RU2537589C2 - Adsorber for air drying unit - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: adsorber includes a housing designed as a hollow cylinder, profiled flanges with nozzles installed on both ends of housing for supply and extraction of dried air, longitudinal stringers installed inside the housing. In adsorber before the flange with nozzle for air supply to adsorber cavity there installed is a profiled washer-filter forming cavity for condensate, at that this cavity is connected to cavity of additional condensate collector. In this version internal surface of the flange with nozzle for air supply to adsorber cavity is designed profiled, preferably conical. The top of cone is directed to nozzle inlet, and on the specified surface there made are profiled channels in the form of alternating rings of various diameter.

EFFECT: manufacturing drying unit with adsorber, which design allows excluding condensed moisture occurrence on adsorbent crystals.

2 dwg

Description

The invention relates to air purification and can be used in gas, oil, petrochemical and other industries.

Known devices for cleaning and drying air, including two adsorbers connected by pipelines that are connected to valves, providing switching of their operating modes from the drying mode to the regeneration mode on command from the valve control system (see Japanese application No. 61-35891 B, MKI B01D 53/26, 53/02 of 08/08/15; application EPO No. 0212101, MKI B01D 53/04, 53/26 of 87.03.04; application of Germany No. 3514473, MKI B01D 53/26, from 86.10.23).

A device for cleaning and drying compressed air (application Germany No. 3304722, class B01D 53/26), containing two adsorbers connected by pipelines with valves installed on them, which provide alternate switching of adsorbers from the drying mode to the regeneration mode, a throttle with a supply pipe dried gas under reduced pressure, into the regenerated adsorber and dehumidifier with a dehumidifier valve that opens according to the switching rhythm of the adsorbers.

A disadvantage of the known device is that the accumulated condensate is released into the environment, as well as at high pressure, therefore, the use of this device is impossible when drying, for example, natural gas, where the condensate may contain components that are harmful to the human body and harmful to the environment Wednesday

A device is known for drying compressed gas, including air, including two adsorbers connected by pipelines containing valves, which switch adsorbers from drying mode to regeneration mode, a throttle with a pipeline for supplying dried gas at reduced pressure to a regenerated adsorber and a moisture separator with a dehumidifier valve in which the dehumidifier is divided into two tanks: a high pressure tank, in the cavity of which a check valve is placed mechanically connected to the float device , and a low-pressure tank with an autonomously controlled dehumidifier valve equipped with a safety valve (RF Patent No.2165786, IPC B01D53 / 26).

The device operates as follows.

Wet gas with condensate enters the primary condensate collector, where condensate accumulates. Separated from the condensate, the moist gas enters one of the adsorbers operating alternately: one in the drying mode, the other in the regeneration mode. Switching of the adsorbers from the drying mode to the regeneration mode, as it is saturated with moisture, is provided by means of control valves.

For the regeneration of the adsorber, a part of the dried gas is used, which is passed through the regenerated adsorber at reduced pressure due to throttling by the throttle. In the regeneration mode, part of the dry gas is fed back to the adsorber. Gas passing through the inner cavity of the adsorber and the adsorbent layer is saturated with moisture. Having reached the upper flange of the casing having a temperature different from the gas temperature, the moist gas condenses on the inner surface of the flange. Drops of condensate flowing down from the surface of the flange fall onto the upper layers of the adsorbent, which leads to waterlogging, partial clogging or cracking of the surface of the adsorbent granules.

The main disadvantage of this adsorber is that droplets of condensed moisture, falling on the adsorbent layer, are absorbed by the adsorbent granules, which leads to accelerated destruction of the adsorbent and shorten the life of the entire adsorber as a whole.

The task of the invention is to remedy these disadvantages and create an adsorber, the use of which will prevent the ingress of drip moisture on the granules of the adsorbent.

The problem is achieved in that the proposed adsorber for the air drying unit, according to the invention, contains at least a housing, mainly made in the form of a hollow cylinder, profiled flanges with fittings, mounted from both ends of the housing for supplying and removing drained air, longitudinal ribs, installed inside the housing, while the absorbent is placed inside the housing, and in front of the flange with a fitting for supplying air to the adsorber cavity, a profiled washer-filter is installed, forming a cavity for the condenser sata.

In an embodiment, the inner surface of the flange with a fitting for supplying air into the cavity of the adsorber is shaped, preferably conical, with the top of the cone facing the inlet of the fitting, and shaped grooves are made on this surface in the form of alternating rings of different diameters.

The invention is illustrated by drawings, where in Fig.1 shows a schematic diagram of a block of air drying with the proposed adsorber, in Fig. 2- longitudinal section of the adsorber.

The proposed adsorber can be used as part of a drying unit of the following design.

The air drying unit contains adsorbers 1 and 2, the main condensate collector 3, control valves 4 and 5, designed to periodically switch the adsorbers, as they are saturated with moisture, from the drying mode to the regeneration mode; chokes 6 and 7 with pipelines for supplying dried low-pressure air to the regenerated adsorber, additional condensate collector 8.

The adsorber 1 contains a housing 9, mainly made in the form of a hollow cylinder, profiled flanges 10 and 11 with fittings 12 and 13, respectively, installed from both ends of the housing 9 for supplying and draining drained air. Inside the housing 1, longitudinal ribs are installed 14. In front of the flange 10 with a fitting 12 for supplying air into the adsorber cavity, a profiled washer-filter 15 is installed, which forms a cavity 16 for condensate, and this cavity 16 is connected to the cavity of the additional condensate collector 8.

The proposed adsorber in the composition of the specified device operates as follows.

Moist air with condensate is supplied to the main condensate collector 3, where the condensate accumulates. Separated from the condensate, moist air is supplied to one of the adsorbers 1 or 2, which operate alternately: one in the drying mode, the other in the regeneration mode.

Switching the adsorbers from the drying mode to the regeneration mode, as they are saturated with moisture, is provided by means of control valves 4 and 5. To regenerate the adsorbers 1 and 2, a part of the dried air is used, which is allowed to pass through the throttle at a reduced pressure by throttle 6 or 7. through a regenerated adsorber.

In the drying mode, moist air is supplied to the housing 9 of the adsorber 1 from above through the nozzle 12, after which it passes through the adsorbent layer, is dried and leaves the adsorber through the nozzle 13.

In the regeneration mode, part of the dry, already purified and dried air is fed into the internal cavity of the adsorber housing 1 in the opposite direction through the nozzle 13. Air passing through the internal cavity of the adsorber housing 1 and the adsorbent layer, which contains moisture after air drying, is saturated with moisture. Having reached the upper flange 10 having a temperature different from the temperature of the air flow, moist air condenses on the inner surface of the flange. Drops of condensate flowing down from the surface of the flange 10 accumulate on the surface of the profiled filter washer 15 and accumulate in the cavity 16, from where they are removed through a fitting into an additional condensate collector 8.

In an embodiment, moisture droplets flowing down the conical surface of the flange 10 fall onto the profiled grooves 17 and break down under the action of gravity, which allows localization of the places where droplet moisture is collected.

The installation of a profiled washer filter 15 will protect the upper layers of the adsorbent from contact with drip moisture, improve drainage conditions and thereby increase the service life of the adsorbent.

Using the proposed technical solution will improve the working conditions of the adsorbent and thereby increase the service life of the adsorber and the drying unit as a whole.

Claims (1)

The adsorber for the air drying unit, characterized in that it contains a housing mainly made in the form of a hollow cylinder, profiled flanges with fittings installed on both ends of the housing for supplying and exhausting drained air, longitudinal ribs installed inside the housing, while inside the housing is placed it is absorbent, and in front of the flange with a fitting for supplying air to the adsorber cavity, a profiled washer-filter is installed, forming a cavity for condensate, while the inner surface of the flange with a fitting for the air supply to the adsorber cavity is shaped, preferably conical, with the apex of the cone facing the inlet of the nozzle, while shaped grooves are made on the indicated surface in the form of alternating rings of different diameters.

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