CN205664699U - Bifilar stream mixes tube bank shell and tube type heat exchanger - Google Patents

Abstract

The utility model discloses a bifilar stream mixes tube bank shell and tube type heat exchanger, including casing, tube sheet, flange, head, cylinder baffle, spiral pipe, spiral rib straight tube, ordinary straight tube, shell side business turn over oral siphon, spiral pipe tube side business turn over oral siphon, straight tube tube side business turn over oral siphon and er shi support, its characterized in that: it restraints to constitute self -supporting formula straight tube by spiral rib straight tube and ordinary straight tube for replace tradition winding tubular heat exchanger's a core section of thick bamboo, the both ends that the straight tube was restrainted are afterwards welded through expanding earlier and are fixed in on the tube sheet, the spiral pipe twines outside the straight tube is restrainted, the winding opposite direction of adjacent two -layer spiral pipe, and the spiral pipe both ends are afterwards welded through expanding earlier and are fixed in on the tube sheet, the pipe case is constituteed with the flange to head, cylinder baffle, and cylinder baffle one end is welded in the head inboardly, and the circular recess joint on the other end and the tube sheet is sealed to to manage the case and fall into two spaces, respectively corresponding to straight tube tube side and spiral pipe tube side. The utility model discloses increased heat transfer area, heat exchange efficiency is higher.

Description

Double stream mixed tube bundle shell and tube heat exchanger

technical field

The utility model relates to the technical field of shell-and-tube heat exchangers, in particular to a double-flow mixing tube-bundle shell-and-tube heat exchanger.

Background technique

The heat exchanger is one of the key equipment for adjusting the temperature of the process medium and recovering waste heat to achieve energy saving and consumption reduction. The tube-wound heat exchanger is a special shell-and-tube heat exchanger. Compared with the general shell-and-tube heat exchanger, the tube-wound heat exchanger has a large heat transfer coefficient, compact structure, small fouling tendency in the tube side, and easy operation. It is widely used in subcoolers and liquefiers (liquid oxygen, liquid ammonia) of large-scale air separation devices, and is also widely used in pharmaceuticals, food, petroleum, chemical industry, metallurgy, electric power, and textile. and HVAC fields.

The existing coiled tube heat exchanger mainly includes parts such as shell, core tube and spiral tube bundle. The core tube is a closed cylinder with both ends welded and fixed to the tube sheet, and is located in the center of the heat exchanger to support the spiral tube. This structure causes the core tube part not to participate in heat exchange, wastes the space of the heat exchanger, reduces the heat exchange area, makes the heat exchanger not compact enough, and the heat exchange efficiency needs to be improved.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides a double-flow mixed tube bundle shell-and-tube heat exchanger, which replaces the core tube with a self-supporting straight tube bundle, increases the heat transfer area, and replaces the traditional coiled tube heat exchanger The space occupied by the core barrel of the heat exchanger is utilized to improve the heat exchange efficiency of the heat exchanger.

The technical scheme adopted in the utility model is: a double-flow mixed tube bundle shell-and-tube heat exchanger, including a shell, a tube plate, a flange, a head, a cylindrical partition, a spiral tube, and a straight tube with spiral ribs. , Ordinary straight pipe, shell-side inlet and outlet pipes, spiral pipe-side inlet and outlet pipes, straight pipe-side inlet and outlet pipes and ear-type supports. It is characterized in that: a self-supporting straight tube bundle is composed of spiral rib straight tubes and ordinary straight tubes, which is used to replace the core tube of the traditional winding tube heat exchanger, and the two ends of the straight tube bundle are fixed on the tube plate by welding; the spiral The tubes are wound outside the straight tube bundle, and the winding directions of the adjacent two layers of spiral tubes are opposite. The two ends of the spiral tubes are fixed on the tube plate by welding; One end of the partition is welded to the inner side of the head, and the other end is butted and sealed with the circular groove on the tube plate, and the tube box is divided into two spaces, corresponding to the straight tube side and the spiral tube side respectively.

A circular groove is machined on the plane of the tube sheet corresponding to the tube box for connecting with the cylindrical partition.

Both the ordinary straight pipe and the spiral rib straight pipe adopt larger diameter pipes, carbon steel pipes or stainless steel pipes can be selected, and the spiral pipes use smaller diameter pipes, stainless steel pipes or copper pipes can be selected.

The self-supporting straight tube bundle is arranged in concentric circles, the inner layer is arranged with spiral rib straight tubes, the outermost layer is arranged with ordinary straight tubes, and the straight tubes are self-supported by spiral ribs.

The spiral tube is wound on the self-supporting straight tube bundle layer by layer from the inside to the outside. The layers of the spiral tube are arranged with 2-6mm thick metal spacers at intervals of 90º or 60º along the circumference. The tube end of the spiral tube and the tube sheet The connection is fixed by expansion first and then welding.

The spiral-ribbed pipe is wound with spiral metal ribs on the outer wall of an ordinary straight pipe, the height of the ribs is equal to the distance between the pipes, and the two ends of the ribs are fixed on the straight pipe by spot welding.

Compared with the prior art, the utility model has the following beneficial effects: First, the core tube of the traditional tube-wound heat exchanger is replaced by a self-supporting straight tube bundle, which makes full use of the space occupied by the core tube and increases the heat exchange rate. The thermal area improves the heat exchange efficiency; the second is that the self-supporting straight tube bundle and the spiral tube bundle constitute a mixed tube bundle, which makes the structure of the heat exchanger more compact and improves the flow space of the fluid in the shell side of the heat exchanger; the third is to use a cylinder The shaped partition divides the tube box into two spaces, thus realizing the dual flow in the tube side.

Description of drawings

Figure 1 is a schematic diagram of the structure of a double-stream mixed tube-bundle shell-and-tube heat exchanger.

Fig. 2 is a front view of the tube sheet of the double-stream mixing tube bundle shell-and-tube heat exchanger.

Reference signs: 1-head; 2-cylindrical partition; 3-shell; 4-ear support; 5-shell side fluid outlet pipe; 6-flange; 7-tube sheet; 8-straight Tube side fluid inlet tube; 9-spiral tube tube side fluid inlet tube; 10-spiral rib straight tube; 11-ordinary straight tube; 12-spiral tube; 13-shell side fluid inlet tube; 14-spiral tube tube side fluid Outlet pipe; 15-straight tube side fluid outlet pipe.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

The assembly process of the double-stream mixed tube bundle shell-and-tube heat exchanger: first, insert the spiral rib straight tube and the ordinary straight tube into one side of the tube plate one by one from the inner layer to the outer layer, and then insert the straight tubes into the other side one by one. side tube sheet, and then all straight tubes and tube sheets are fixed by first expansion and then welding to form a self-supporting straight tube bundle; the spiral tube is wound on the self-supporting straight tube bundle layer by layer from the inside to the outside, and the spiral tube layer and layer A number of spacers are arranged between the adjacent layers of spiral tube bundles, and the direction of rotation of the spiral tube bundles in adjacent layers is opposite. The spiral tube ends and the tube sheets are fixed by expansion first and then welding; Install the heads with cylindrical partitions at both ends of the shell, and connect and fix them with the shell flange.

When the heat exchanger is working, the shell-side fluid flows in from the inlet pipe 13, axially scours the straight tube bundle and the spiral tube bundle in the shell, conducts convective heat exchange with the straight tube and the spiral tube, and flows out from the outlet pipe 5. The straight tube side and the spiral tube side correspond to two different heat exchange media, and the fluid inlet pipe 8 of the straight tube side and the fluid inlet pipe 9 of the helical tube side flow into the straight tube 10, 11 and the spiral tube 12 respectively, and are connected with the shell The heat is exchanged with the pass fluid, and finally flows out from the straight pipe pass fluid outlet pipe 15 and the helical pipe pass fluid outlet pipe 14.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (4)

1. a bifilar stream mixed tube bundle shell-and-tube heat exchanger, including housing, tube sheet, flange, end socket, cylindrical shape dividing plate, spiral Pipe, spiral rib straight tube, normal straight tube, shell side inlet/outlet pipe, serpentine pipe tube side inlet/outlet pipe, straight tube tube side inlet/outlet pipe and ear Formula bearing, it is characterised in that: formed self-support type straight tube bundle by spiral rib straight tube and normal straight tube, be used for replacing traditional wound The core cylinder of pipe heat exchanger, the two ends of straight tube bundle are scheduled on tube sheet by first swollen rear solid welding；Described serpentine pipe is wrapped in straight tube bundle Outward, serpentine pipe two ends are scheduled on tube sheet by first swollen rear solid welding；Described end socket, cylindrical shape dividing plate form bobbin carriage, cylinder with flange Shape dividing plate one end is welded in inside end socket, the other end and the circular trough Butt sealing on tube sheet, and bobbin carriage is divided into two spaces, Correspond respectively to straight tube tube side and serpentine pipe tube side.

Bifilar stream mixed tube bundle shell-and-tube heat exchanger the most according to claim 1, it is characterised in that: described tube sheet corresponds to A circular trough is processed, for docking with cylindrical shape dividing plate in the plane of bobbin carriage.

Bifilar stream mixed tube bundle shell-and-tube heat exchanger the most according to claim 1, it is characterised in that: described normal straight tube and Spiral rib straight tube all uses larger-diameter tubing, and described serpentine pipe uses the tubing of small diameter.

Bifilar stream mixed tube bundle shell-and-tube heat exchanger the most according to claim 1, it is characterised in that: described self-support type is straight Tube bank arranges spiral ribs bar straight tube by circular concentric stringing, its internal layer, and outermost layer arranges normal straight tube, by spiral rib between straight tube Form self-supporting.