CN114046494A - Communication system and standby method for industrial steam extraction - Google Patents
Communication system and standby method for industrial steam extraction Download PDFInfo
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- CN114046494A CN114046494A CN202111112059.6A CN202111112059A CN114046494A CN 114046494 A CN114046494 A CN 114046494A CN 202111112059 A CN202111112059 A CN 202111112059A CN 114046494 A CN114046494 A CN 114046494A
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- 238000000605 extraction Methods 0.000 title claims abstract description 191
- 238000004891 communication Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005086 pumping Methods 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010977 unit operation Methods 0.000 abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
- F22D1/325—Schematic arrangements or control devices therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Fluid Pressure (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a communication system and a standby method of industrial extraction steam, which comprises a first-stage extraction steam, a first high-pressure heater, an extraction industrial extraction steam valve group, a fourth machine water supply main pipe, a temperature reduction valve group, a temperature reducer and a safety valve; the first-stage steam extraction is connected with a first high-pressure heater, the output end of the first-stage steam extraction is connected with the input end of a first-stage steam extraction valve group, the first-stage steam extraction valve group is connected with a desuperheater, and the output end of a fourth water supply main pipe is connected with the desuperheater through the desuperheater valve group. According to the invention, after the unit is tripped, the parallel connection of steam extraction can be realized through the fourth unit of the contact system, so that the continuity of industrial steam extraction and the stability of parameters are ensured, and the stable operation of a power plant is ensured; the first pumping and the second pumping of the fourth unit can realize the self-supply of industrial pumping steam through a fifth industrial pumping pipeline, so that the environmental protection parameters in the unit operation process reach the standard, and the loss of electric quantity and the economic check of a power grid are avoided.
Description
Technical Field
The invention relates to the technical field of thermal power coal-fired units, in particular to an industrial steam extraction connection system and a standby method.
Background
The industrial steam extraction is an important income part of a thermal power plant, and the steam which is used for performing work by a steam turbine meets certain parameters of users, thereby reducing the cold source loss of a coal-fired unit, improving the circulating heat efficiency of the unit, reducing the coal consumption, saving the power supply cost, and gaining extra income through the supply of a steam source; at present, most of ammonia gas for denitration in a thermal power plant is formed by industrial steam extraction and urea hydrolysis, so that the stability of industrial steam extraction parameters and flow determines whether a unit can reach the national ultra-low emission standard.
At present, the single-machine operation condition of a unit often occurs in most power grids, if the single-machine operation is stopped under the abnormal condition, the risk of losing industrial steam extraction is faced, the industrial steam extraction of the unit and the unit are communicated for standby, and the pressure grade of a proper communication steam source is selected, so that the method is one of the technical problems faced by the thermal power plant at present.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an industrial steam extraction connection system and a standby method.
In order to achieve the purpose, the invention adopts the following technical scheme:
an industrial extraction communication system comprising:
the system comprises a first-stage steam extraction device, a first high-pressure heater, a first extraction industrial steam extraction valve group, a fourth machine water supply main pipe, a temperature reduction valve group, a desuperheater and a safety valve;
the first-stage steam extraction is connected with a first high-pressure heater, the output end of the first-stage steam extraction connection is connected with the input end of a first industrial steam extraction valve group, the first industrial steam extraction valve group is connected with a desuperheater, the output end of a fourth main water supply pipe is connected with the desuperheater through the desuperheater valve group, a safety valve is arranged on a rear pipeline of the desuperheater to ensure the safety of equipment and pipelines, the desuperheater is simultaneously connected with a drain valve group, and the drain valve group can drain and warm the pipes fully before the start of operation;
the desuperheater is also connected to manual doors of industrial steam extraction pipelines from a fourth machine to a fifth machine, the manual doors of the industrial steam extraction pipelines from the fourth machine to the fifth machine are connected with electric doors of cylinders from the fifth machine to the steam splitting cylinder and a unit denitration steam supply device, and the unit denitration steam supply device can provide steam for denitration for a unit; the output end of the electric door from the fifth machine to the steam-separating cylinder is connected with an industrial steam-extracting steam-separating cylinder, and the output end of the industrial steam-extracting steam-separating cylinder is connected with the input end of a steam supply device of an industrial steam-extracting user.
Preferably, the communication system for industrial steam extraction further comprises a secondary steam extraction and a fifth machine industrial steam extraction;
the pipeline door of the fifth machine industrial steam extraction is connected with the fifth machine industrial steam extraction electric door, then is merged into the fifth machine industrial steam extraction pipeline, and is connected with the fifth machine industrial steam extraction to steam distribution cylinder electric door through the fifth machine industrial steam extraction pipeline;
the secondary steam extraction is connected with a second high-pressure heater, the secondary steam extraction is connected with a second steam extraction valve group, the second steam extraction valve group is connected with the safety valve, the second steam extraction valve group is connected with a drain valve group, and the second steam extraction valve group is connected with the manual valves of the fourth-fifth-machine industrial steam extraction pipelines.
Preferably, the first-extraction industrial extraction valve group comprises an electric valve, an adjusting valve and front and rear manual valves of the electric valve; the temperature reduction valve group comprises an adjusting door, a manual door in front of the adjusting door, a check valve and a manual door behind the adjusting door, and efficient and quick adjustment of a pumping industrial steam extraction valve and a temperature reduction valve is facilitated.
Preferably, the safety valve arranged on the rear pipeline of the desuperheater is an air safety valve, and safety of equipment and pipelines can be guaranteed through the air safety valve.
Preferably, the pipeline from the first-stage steam extraction and the second-stage steam extraction to the fifth-machine industrial steam extraction is provided with a drain valve group, and water and warm pipes can be fully conveyed before operation.
Preferably, the air safety valve comprises a valve body, an air inlet channel is formed in the bottom of the valve body, a valve seat is fixedly mounted at the top of the air inlet channel, an exhaust pipe is formed in the side face of the valve body, a valve cover is fixedly mounted at the top of the valve body through a flange and a screw, an upper spring disc is fixedly mounted at the top of the inner side of the valve cover, a pressure spring is fixedly mounted at the bottom of the upper spring disc, a lower spring disc is fixedly mounted at the bottom of the pressure spring, a valve rod is movably sleeved on the inner side of the upper spring disc, the valve rod is fixedly sleeved with the lower spring disc, and meanwhile a cleaning mechanism is mounted at the bottom end of the valve rod.
Preferably, clean mechanism is including clean dish, air vane and dwang, the dwang is fixed cup joint in the bottom of valve rod, just the dwang with rolling bearing is installed to the junction of valve rod, air vane fixed mounting in the table lateral wall of dwang, clean dish with the dwang is fixed cup joints, the inboard fixed mounting of clean dish has fixed box, the inside of fixed box is close to one side fixed mounting of dwang has expanding spring, expanding spring's other end fixed mounting has clean stick.
A method for backing up an industrial extraction steam, comprising the steps of:
the method comprises the steps that during the hot standby period, the fourth-fifth industrial steam extraction pipeline doors are kept fully opened, the electric door, the adjusting door and the temperature-reducing water adjusting door in the first-extraction industrial steam extraction valve group, the electric door, the adjusting door and the fourth-machine water supply main pipe in the second-extraction industrial steam extraction valve group are kept closed to the first-extraction temperature-reducing valve group, other manual doors are kept opened, the drain door is properly opened, and the electric door and the adjusting door are interlocked at the throwing-in position;
after receiving the command that the fifth machine industrial steam extraction is stopped and the fourth machine industrial steam extraction is immediately put into operation, immediately stopping the operation of the first high-pressure heater and the second high-pressure heater, closing steam inlet electric doors of the first high-pressure heater and the second high-pressure heater, and after the high-pressure heater is stopped, opening electric doors and adjusting doors in the second-extraction industrial steam extraction valve group and putting the second-extraction industrial steam extraction into operation;
and opening an electric door and an adjusting door in a fourth machine first-pumping industrial steam extraction valve group, feeding a fourth machine water supply main pipe to a pumping and temperature-reducing valve group, and putting the fourth machine water supply main pipe into the first-pumping industrial steam extraction valve group.
Preferably, the temperature of the industrial steam extraction main pipe is kept at 240-300 ℃, and the pressure of the industrial steam extraction main pipe does not exceed 0.85-0.9 MPa.
Compared with the prior art, the invention has the beneficial effects that:
1. the safety valve arranged on the rear pipeline of the desuperheater can ensure the safety of equipment and pipelines; the drain valve group connected with the desuperheater can drain and warm the pipe fully before operation, so that the safety of equipment is ensured; the safety of equipment and pipelines can be ensured by arranging an empty safety valve in the rear pipeline of the desuperheater;
2. when the pipeline pressure behind the desuperheater exceeds the limit set by the safety valve, the gas in the air inlet channel pushes the valve clack to move upwards and compress the pressure spring, after the valve clack is jacked up by the gas, the air inlet channel and the inside of the exhaust pipe are in a flowing state, the rotating rod is driven to rotate through the rotation of the pneumatic blades, and the cleaning disc is driven to rotate at the same time;
when the air pressure in the pipeline recovers to a normal level, the valve clack is pushed to recover to a closed state under the action of the pressure spring, the rotating rod stops rotating, the cleaning rod retracts to the original position under the action of the restoring force of the telescopic spring, additional driving force is not needed, the cleaning and automatic resetting effects are achieved by utilizing the pressure of the air, the energy is saved, and the safe operation of the system is ensured.
3. After the unit trips, because the fourth unit pressure grade is different, utilize the fourth unit to realize drawing steam and connect in parallel through the contact system, guarantee the continuity of industry drawing steam and the stability of parameter, guaranteed the stable operation of power plant.
4. Compared with the prior power plant, once the industrial steam extraction is lost for more than half an hour, if the fourth unit is operated, the nitrogen oxides exceed the standard, the hourly mean value of the nitrogen oxides exceeds a certain limit, the unit is forced to be unplanned to stop operation, the serious assessment of the power grid is caused, the environmental protection parameters in the unit operation process can be guaranteed to reach the standard through the novel communication system and the novel standby method, and the loss of electric quantity and the economic assessment of the power grid are avoided.
Drawings
FIG. 1 is a schematic diagram of a backup method for industrial steam extraction according to the present invention;
FIG. 2 is a schematic diagram of an industrial extraction communication system according to the present invention;
fig. 3 is a schematic view of the overall structure of an air safety valve of a communication system for industrial steam extraction according to the present invention;
FIG. 4 is a schematic view of the drive mechanism of the cleaning mechanism for the air relief valve of the tie-up system for industrial steam extraction according to the present invention;
fig. 5 is a schematic structural view of a cleaning mechanism of an air safety valve of a communication system of industrial steam extraction provided by the invention.
In the figure: 1. a valve body; 2. a valve cover; 3. an air intake passage; 4. an exhaust pipe; 5. a valve seat; 6. An upper spring holder; 7. a valve stem; 8. a pressure spring; 9. a valve flap; 10. a cleaning mechanism; 11. a lower spring holder; 12. an air vane; 13. cleaning the disc; 14. a fixing box; 15. a tension spring; 16. A cleaning rod; 17. rotating the rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, an industrial extraction steam communication system includes:
the system comprises a first-stage steam extraction device, a first high-pressure heater, a first extraction industrial steam extraction valve group, a fourth machine water supply main pipe, a temperature reduction valve group, a desuperheater and a safety valve;
the first-stage steam extraction is connected with a first high-pressure heater, the output end of the first-stage steam extraction connection is connected with the input end of a first extraction industrial steam extraction valve group, the first extraction industrial steam extraction valve group is connected with a desuperheater, the output end of a fourth water supply main pipe is connected with the desuperheater through the desuperheater valve group, a safety valve is arranged on a rear pipeline of the desuperheater to ensure the safety of equipment and a pipeline, the desuperheater is connected with a drain valve group at the same time, and the drain valve group can drain and warm the pipe fully before the desuperheater is put into operation;
the desuperheater is also connected to manual doors of industrial steam extraction pipelines from a fourth machine to a fifth machine, the manual doors of the industrial steam extraction pipelines from the fourth machine to the fifth machine are connected with electric doors of cylinders from the fifth machine to the steam splitting cylinder and a unit denitration steam supply device, and the unit denitration steam supply device can provide denitration steam for the unit; the output end of the electric door from the fifth machine to the steam-separating cylinder is connected with an industrial steam-extracting steam-separating cylinder, and the output end of the industrial steam-extracting steam-separating cylinder is connected with the input end of a steam supply device of an industrial steam-extracting user.
Referring to fig. 2, an industrial steam extraction communication system further includes a secondary steam extraction and a fifth machine industrial steam extraction;
the pipeline door of the fifth machine industrial steam extraction is connected with the fifth machine industrial steam extraction electric door, then is merged into the fifth machine industrial steam extraction pipeline, and is connected with the fifth machine industrial steam extraction to steam distribution cylinder electric door through the fifth machine industrial steam extraction pipeline;
the second-stage steam extraction and second-stage steam extraction are connected with a second high-pressure heater, the second-stage steam extraction is connected with a second-stage steam extraction valve group, the second-stage steam extraction valve group is connected with a safety valve, the second-stage steam extraction valve group is connected with a drain valve group, and the second-stage steam extraction valve group is connected with manual valves of industrial steam extraction pipelines from a fourth machine to a fifth machine.
As shown in fig. 2, the first-pumping industrial extraction valve group comprises an electric valve, an adjusting valve and front and rear manual valves of the electric valve; the temperature reduction valve group comprises an adjusting door, a manual door in front of the adjusting door, a check valve and a manual door behind the adjusting door, and the industrial steam extraction valve and the temperature reduction valve can be conveniently and efficiently and quickly adjusted.
As shown in FIG. 2, the safety valve arranged on the rear pipeline of the desuperheater is an empty safety valve, and the safety of equipment and pipelines can be ensured through the empty safety valve.
Referring to fig. 2, the pipeline from the first-stage steam extraction and the second-stage steam extraction to the fifth-machine industrial steam extraction is provided with a drain valve group, and water and heating pipes can be fully conveyed before operation.
As shown in fig. 3, inlet channel 3 has been seted up to the bottom of the valve body 1 of air relief valve, inlet channel 3's top fixed mounting has disk seat 5, blast pipe 4 has been seted up to the side of valve body 1, flange and screw fixed mounting have valve gap 2 at the top of valve body 1, inboard top fixed mounting of valve gap 2 has last spring holder 6, the bottom fixed mounting who goes up spring holder 6 has pressure spring 8, pressure spring 8's bottom fixed mounting has lower spring holder 11, the inboard activity of going up spring holder 6 has cup jointed valve rod 7, and valve rod 7 and lower spring holder 11 fixed cup joint, clean mechanism 10 is installed to the bottom of valve rod 7 simultaneously.
As shown in fig. 4-5, the cleaning mechanism 10 includes a cleaning disk 13 and a pneumatic blade 12, the valve rod 7 is fixedly mounted on the surface side wall of the valve rod 7, the cleaning disk 13 is fixedly sleeved with the valve rod 7, a fixing box 14 is fixedly mounted on the inner side of the cleaning disk 13, an extension spring 15 is fixedly mounted on one side of the fixing box 14 close to the valve rod 7, and a cleaning rod 16 is fixedly mounted on the other end of the extension spring 15.
Referring to fig. 1, a method for backing up an industrial extraction steam includes the following steps:
s1: during the hot standby period, the fourth machine to the fifth machine industrial steam extraction pipeline doors are kept fully opened, the electric door, the adjusting door and the temperature-reducing water adjusting door in the first-pump industrial steam extraction valve group, the electric door, the adjusting door and the fourth machine water supply main pipe in the second-pump industrial steam extraction valve group and the first-pump temperature-reducing valve group are kept closed, other manual doors are kept opened, the drain door is properly opened, and the electric door and the adjusting door are interlocked at the throwing-in position;
s2: after receiving a command that the fifth machine industrial steam extraction stops running and the fourth machine industrial steam extraction immediately starts, immediately stopping running of the first high-pressure heater and the second high-pressure heater, closing steam inlet electric doors of the first high-pressure heater and the second high-pressure heater, and after stopping running of the high-pressure heater, opening electric doors and adjusting doors in a second-extraction industrial steam extraction valve group and starting second extraction to industrial steam extraction;
s3: and opening an electric door and an adjusting door in a fourth machine first-pumping industrial steam extraction valve group, feeding a fourth machine water supply main pipe to a pumping and temperature-reducing valve group, and putting the fourth machine water supply main pipe into the first-pumping industrial steam extraction valve group.
The temperature of the industrial steam extraction main pipe is kept at 300 ℃ of 240 ℃ and the pressure of the industrial steam extraction main pipe is not more than 0.85-0.9 MPa.
In the invention, the first-pumping industrial steam extraction valve group comprises an electric door, an adjusting door and front and rear manual doors of the electric door; the temperature reduction valve group comprises an adjusting door, a manual door in front of the adjusting door, a check valve and a manual door behind the adjusting door, and is convenient for efficiently and quickly adjusting the industrial steam extraction valve and the temperature reduction valve;
when the pipeline pressure behind the desuperheater exceeds the limit set for the air safety valve, the gas in the air inlet channel 3 pushes the valve flap 9 to move upwards and compress the pressure spring 8, after the valve flap 9 is jacked up by the gas, the air inlet channel 3 and the inside of the exhaust pipe 4 are in a flowing state, the rotating rod 17 is driven to rotate through the rotation of the pneumatic blade 12, and the cleaning disk 13 is driven to rotate at the same time, the cleaning rod 16 extends out in the direction far away from the rotating rod 17 under the influence of the rotating centrifugal force, the top of the valve seat 5 is rubbed, the top of the valve seat 5 can be cleaned, impurities attached to the top of the valve seat 5 in the gas can be removed, the sealing performance of the air safety valve is ensured, and the stability and the safety of the whole pipeline system are improved;
when the air pressure in the pipeline is restored to a normal level, the valve clack 9 is pushed to be restored to a closed state under the action of the pressure spring 8, the rotating rod 17 stops rotating, the cleaning rod 16 retracts to the original position under the action of the restoring force of the telescopic spring 15, additional driving force is not needed, the cleaning and automatic restoration effects are achieved by utilizing the pressure of the air, the energy is saved, and the safe operation of the system is ensured;
during the hot standby period, the fourth machine to the fifth machine industrial steam extraction pipeline doors are kept fully opened, the electric door, the adjusting door and the temperature-reducing water adjusting door in the first-pump industrial steam extraction valve group, the electric door, the adjusting door and the fourth machine water supply main pipe in the second-pump industrial steam extraction valve group and the first-pump temperature-reducing valve group are kept closed, other manual doors are kept opened, the drain door is properly opened, and the electric door and the adjusting door are interlocked at the throwing-in position;
after receiving a command that the fifth machine industrial steam extraction is stopped and the fourth machine industrial steam extraction is immediately put into operation, immediately stopping the operation of the first high-pressure heater and the second high-pressure heater, closing steam inlet electric doors of the first high-pressure heater and the second high-pressure heater, and quickly opening an electric door and an adjusting door in a second-extraction industrial steam extraction valve group after the high-pressure heater is stopped to put in second-extraction industrial steam extraction;
opening an electric door and an adjusting door in a fourth machine first-pumping industrial steam extraction valve group, putting a fourth machine water supply main pipe to a pumping temperature reduction valve group, and pumping to industrial steam extraction;
after the unit is tripped, the fourth unit of the contact system can realize parallel steam extraction, so that the continuity of industrial steam extraction and the stability of parameters are ensured, and the stable operation of a power plant is ensured; meanwhile, industrial steam extraction self-supply can be realized through the first steam extraction and the second steam extraction of the fourth unit and the fifth industrial steam extraction pipeline, environmental protection parameters in the unit operation process are guaranteed to reach the standard, and electric quantity loss and economic assessment of a power grid are avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. An industrial extraction steam communication system, comprising:
the system comprises a first-stage steam extraction device, a first high-pressure heater, a first extraction industrial steam extraction valve group, a fourth machine water supply main pipe, a temperature reduction valve group, a desuperheater and a safety valve;
the first-stage steam extraction is connected with a first high-pressure heater, the output end of the first-stage steam extraction connection is connected with the input end of a first industrial steam extraction valve group, the first industrial steam extraction valve group is connected with a desuperheater, the output end of a fourth main water supply pipe is connected with the desuperheater through the desuperheater valve group, a safety valve is arranged on a rear pipeline of the desuperheater to ensure the safety of equipment and pipelines, the desuperheater is simultaneously connected with a drain valve group, and the drain valve group can drain and warm the pipes fully before the start of operation;
the desuperheater is also connected to manual doors of industrial steam extraction pipelines from a fourth machine to a fifth machine, the manual doors of the industrial steam extraction pipelines from the fourth machine to the fifth machine are connected with electric doors of cylinders from the fifth machine to the steam splitting cylinder and a unit denitration steam supply device, and the unit denitration steam supply device can provide steam for denitration for a unit; the output end of the electric door from the fifth machine to the steam-separating cylinder is connected with an industrial steam-extracting steam-separating cylinder, and the output end of the industrial steam-extracting steam-separating cylinder is connected with the input end of a steam supply device of an industrial steam-extracting user.
2. An industrial steam extraction communication system as claimed in claim 1, wherein the industrial steam extraction communication system further includes a secondary steam extraction and a fifth machine industrial steam extraction;
the pipeline door of the fifth machine industrial steam extraction is connected with the fifth machine industrial steam extraction electric door, then is merged into the fifth machine industrial steam extraction pipeline, and is connected with the fifth machine industrial steam extraction to steam distribution cylinder electric door through the fifth machine industrial steam extraction pipeline;
the secondary steam extraction is connected with a second high-pressure heater, the secondary steam extraction is connected with a second steam extraction valve group, the second steam extraction valve group is connected with the safety valve, the second steam extraction valve group is connected with a drain valve group, and the second steam extraction valve group is connected with the manual valves of the fourth-fifth-machine industrial steam extraction pipelines.
3. The system of claim 1, wherein the group of extraction industrial extraction valves includes a power gate, a regulator gate, and a front and rear manual gate for the power gate; the temperature reduction valve group comprises an adjusting door, a manual door in front of the adjusting door, a check valve and a manual door behind the adjusting door, and efficient and quick adjustment of a pumping industrial steam extraction valve and a temperature reduction valve is facilitated.
4. An industrial steam extraction communication system as claimed in claim 1, wherein the safety valve provided in the rear pipeline of the desuperheater is an air safety valve, and the safety of equipment and pipelines can be ensured through the air safety valve.
5. The system of claim 1, wherein the pipes from the first-stage extraction steam and the second-stage extraction steam to the fifth-stage industrial extraction steam are provided with a drain valve set, so that water and heating pipes can be fully delivered before operation.
6. The industrial steam extraction communication system as claimed in claim 1, wherein the air-to-air safety valve comprises a valve body (1), an air inlet passage (3) is formed at the bottom of the valve body (1), a valve seat (5) is fixedly mounted at the top of the air inlet passage (3), an exhaust pipe (4) is formed at the side surface of the valve body (1), a valve cover (2) is fixedly mounted at the top of the valve body (1) through a flange and a screw, an upper spring disc (6) is fixedly mounted at the top of the inner side of the valve cover (2), a pressure spring (8) is fixedly mounted at the bottom of the upper spring disc (6), a lower spring disc (11) is fixedly mounted at the bottom of the pressure spring (8), a valve rod (7) is movably sleeved at the inner side of the upper spring disc (6), and the valve rod (7) is fixedly sleeved with the lower spring disc (11), meanwhile, a cleaning mechanism (10) is installed at the bottom end of the valve rod (7).
7. The connection system of industry extraction of steam of claim 6, characterized in that, clean mechanism (10) is including clean dish (13), air vane (12) and dwang (17), dwang (17) fixed cup joint in the bottom of valve rod (7), just dwang (17) with rolling bearing is installed to the junction of valve rod (7), air vane (12) fixed mounting in the table lateral wall of dwang (17), clean dish (13) with dwang (17) fixed cup joint, the inboard fixed mounting of clean dish (13) has fixed box (14), the inside of fixed box (14) is close to one side fixed mounting of dwang (17) has expanding spring (15), the other end fixed mounting of expanding spring (15) has clean stick (16).
8. A standby method for industrial extraction steam is characterized by comprising the following steps:
the method comprises the steps that during the hot standby period, the fourth-fifth industrial steam extraction pipeline doors are kept fully opened, the electric door, the adjusting door and the temperature-reducing water adjusting door in the first-extraction industrial steam extraction valve group, the electric door, the adjusting door and the fourth-machine water supply main pipe in the second-extraction industrial steam extraction valve group are kept closed to the first-extraction temperature-reducing valve group, other manual doors are kept opened, the drain door is properly opened, and the electric door and the adjusting door are interlocked at the throwing-in position;
after receiving the command that the fifth machine industrial steam extraction is stopped and the fourth machine industrial steam extraction is immediately put into operation, immediately stopping the operation of the first high-pressure heater and the second high-pressure heater, closing steam inlet electric doors of the first high-pressure heater and the second high-pressure heater, and after the high-pressure heater is stopped, opening electric doors and adjusting doors in the second-extraction industrial steam extraction valve group and putting the second-extraction industrial steam extraction into operation;
and opening an electric door and an adjusting door in a fourth machine first-pumping industrial steam extraction valve group, feeding a fourth machine water supply main pipe to a pumping and temperature-reducing valve group, and putting the fourth machine water supply main pipe into the first-pumping industrial steam extraction valve group.
9. A backup method for industrial steam extraction according to claim 8, characterized in that the temperature of the industrial steam extraction main pipe is maintained at 240-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112059.6A CN114046494B (en) | 2021-09-23 | 2021-09-23 | Communication system and standby method for industrial steam extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112059.6A CN114046494B (en) | 2021-09-23 | 2021-09-23 | Communication system and standby method for industrial steam extraction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114046494A true CN114046494A (en) | 2022-02-15 |
| CN114046494B CN114046494B (en) | 2024-03-22 |
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