Plate type evaporation kettle type reboiler

Abstract

A plate type evaporation kettle type reboiler comprises a kettle shell, the reboiler adopts a plate bundle composed of plate type heat exchangers, the plate bundle is composed of a plurality of sets of plate tubes which are vertically arranged, and the upper end face of a fluid inlet of the plate bundle and the lower end face of a fluid outlet of the plate bundle are connected into a whole through an upper collecting tube and a lower collecting tube in a sealed mode respectively. The heat flow inlet is communicated with the upper collecting pipe through the combiner box after entering the kettle shell; the lower collecting pipe is communicated with the heat flow outlet, and the heat flow outlet is connected with the kettle shell through an expansion joint; after the plate bundle support and the lower collecting pipe are fixedly connected, the whole plate bundle is mounted in the kettle shell in a self-supporting manner; working medium inlets are symmetrically formed in the bottom of the kettle shell. The heat exchanger has the advantages of being high in heat transfer efficiency, small in number, small in occupied area, compact in structure, small in pressure drop and simple in technological process.

Description

Technical Field

[0001] The utility model relates to the technical field of reboilers, in particular to a plate-type evaporator-type reboiler. Background Art

[0002] The reboiler is used to heat the working fluid inside the kettle shell, so that the working fluid inside the kettle shell is heated and expanded again until it vaporizes, the density becomes smaller, and part of the working fluid rises into steam. It is a heat transfer equipment that provides energy for heat and mass transfer of vapor-liquid phase working fluid.

[0003] Reboilers are widely used in chemical plants. Currently, the commonly used heat transfer elements of reboilers are mostly shell and tube. Reboilers rely on forced circulation or thermal siphon to provide circulation power. Most of them are traditional shell and tube reboilers installed outside the tower. They have a wide range of applications, but there are some problems: a single series of devices use a large number of shell and tube reboilers, the kettle shell is large, the energy consumption is high, and the cost is high. Most of them are fixed tube plate reboilers, the tube bundle occupies a large space, the large forgings such as the tube plate and equipment flange are heavy, the tube bundle cannot be disassembled, there is no inspection space inside the kettle shell, and it is not easy to inspect, clean and repair. Utility Model Content

[0004] The utility model provides a plate-type evaporator-type reboiler, which has the advantages of high heat transfer efficiency, small number of units, small footprint, compact structure, small pressure drop and simple process flow.

[0005] The technical solution adopted by this utility model is:

[0006] A plate evaporator reboiler comprises a kettle shell. The reboiler adopts a plate bundle composed of a plate heat exchanger, which is composed of multiple groups of plate tubes arranged vertically. The upper end face of the fluid inlet and the lower end face of the fluid outlet of the plate bundle are sealed and connected as a whole by an upper collecting pipe and a lower collecting pipe respectively; the hot flow inlet enters the kettle shell and passes through the junction box and the upper collecting pipe; the lower collecting pipe and the hot flow outlet are connected, and the hot flow outlet is connected to the kettle shell through an expansion joint; after the plate bundle support and the lower collecting pipe are fixed, the plate bundle is installed in the kettle shell in a self-supporting manner; the working medium inlet is symmetrically arranged at the bottom of the kettle shell.

[0007] A separation element is provided at the working medium outlet on the top of the kettle shell.

[0008] A manhole is arranged on the kettle shell.

[0009] The plate tube is composed of a herringbone corrugated plate, a horizontal straight corrugated plate or a tumor-shaped plate.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] 1. The plate bundle consists of multiple groups of plates and tubes arranged vertically. By using different plate types and changing the flow channel size between the plates, the pressure drop is reduced and the heat transfer efficiency is high.

[0012] 2. The plate bundle is installed inside the kettle shell, the reboiler has compact structure, simple flow, high heat transfer efficiency, less equipment number and less engineering investment.

[0013] 3. The plate bundle has high heat transfer efficiency and occupies less space of the kettle shell, and a manhole on the kettle shell is used to conveniently enter the kettle shell for cleaning, inspection and maintenance.

[0014] 4. The plate bundle is provided with a plate bundle support at the lower part, the plate bundle support is welded with a lower collecting pipe, the plate bundle is integrally installed after manufacturing, and is self-supported in the kettle shell, and the installation mode is simple.

[0015] 5. The plate bundle is connected with the kettle shell through a hot flow inlet, a flow box, a collecting pipe, a hot flow outlet and an expansion joint, without a tube plate and a large forging equipment flange, and the project is economical, cost-effective, and has small investment.

[0016] 6. The separator is installed at the working medium outlet of the kettle shell, the reboiler completes heat transfer and separation at the same time, and an external separator is not arranged, and the project has less investment.

[0017] 7. The hot medium enters through the hot flow inlet and the flow box, is distributed by the upper collecting pipe, flows through the plate bundle, completes heating of the working medium in the kettle shell, is collected by the bottom collecting pipe, and is led out of the reboiler through the hot flow outlet, compared with other forms of reboilers, the hot medium and the working medium are uniformly distributed, the flow space is large, and the pressure drop is small.

[0018] 8. The hot flow outlet is connected with the kettle shell through the expansion joint, the plate bundle has good thermal expansion and elongation effect, the expansion joint has the same size as the hot flow outlet, compared with the fixed tube plate type reboiler without shell expansion joint, the project has less investment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the utility model;

[0020] Figure 2 It is a side view of Figure 1 . DETAILED DESCRIPTION

[0021] In order to better introduce the technical scheme of the utility model, the specific implementation manner of the utility model is further explained in combination with Figure 1 and Figure 2 .

[0022] Refer to Figure 1 , Figure 2The utility model relates to a plate type evaporation kettle type reboiler, including kettle shell 5, and reboiler adopts the plate bundle 3 that plate heat exchanger constitutes, and it is composed of multiple groups of plate tube vertical arrangement, and the fluid inlet upper end surface of the plate bundle 3, fluid outlet lower end surface are sealed and connected as an organic whole by upper collecting pipe 4, lower collecting pipe 13 respectively, and hot stream inlet 1 is through the through -flow box 2 and upper collecting pipe 4 after entering kettle shell 5, and the lower collecting pipe 13 and hot stream outlet 11 are through, and hot stream outlet 11 is connected with kettle shell 5 through expansion joint 12, and plate bundle support 8 and lower collecting pipe 13 are welded after the whole plate bundle 3 is self -supporting installation in kettle shell 5, and the bottom of kettle shell 5 is symmetrically provided with working medium inlet 9.

[0023] The upper collecting pipe 4 is welded with the plate bundle 3, and the hot medium flows in the upper collecting pipe 4 and is distributed in the upper collecting pipe 4, so that the hot medium is evenly distributed in the plate bundle 3.

[0024] The lower collecting pipe at the bottom of the plate bundle plays a role in flowing and collecting the hot medium.

[0025] The kettle shell 5 is provided with a manhole 10, and personnel can conveniently enter the kettle shell 5 to check the plate bundle 3.

[0026] The plate tube is composed of herringbone corrugated plates, horizontal straight corrugated plates or nodule-shaped plate pieces, and different channel sizes of plate bundle plate type heat exchange plates are used to change the flow channel size between the plates, so that the pressure drop is low and the heat transfer efficiency is high.

[0027] The working process of the utility model is as follows: the hot medium sequentially passes through the hot stream inlet 1, the through-flow box 2 and the upper collecting pipe 4, and then is evenly exchanged with the working medium in the plate bundle 3 and the kettle shell 5. The hot medium after heat exchange is collected by the collecting pipe 4 at the bottom of the plate bundle 3 and flows out through the hot stream outlet 11 and the expansion joint 12. The working medium in the saturated state is heated and separated into gas phase and liquid phase working medium by the separation element 6 at the top of the kettle shell 5.

Claims

1. A plate-type evaporator kettle-type reboiler comprising a kettle shell, characterized in that, The reboiler uses a plate bundle (3) composed of plate heat exchangers, which is composed of multiple groups of vertically arranged plate tubes, the fluid inlet upper end face and the fluid outlet lower end face of the plate bundle (3) are respectively sealed and connected as a whole by the upper header (4) and the lower header (13); the hot stream inlet (1) enters the kettle shell (5) and then penetrates through the header box (2) and the upper header (4); the lower header (13) and the hot stream outlet (11) are penetrated, and the hot stream outlet (11) is connected with the kettle shell (5) through the expansion joint (12); after the plate bundle support (8) and the lower header (13) are fixedly connected, the plate bundle (3) is integrally and self-supportingly installed in the kettle shell (5); the working medium inlet (9) is symmetrically arranged at the bottom of the kettle shell (5).

2. A plate evaporator type reboiler according to claim 1, characterized in that A separation element (6) is arranged at the working medium outlet (7) at the top of the kettle shell (5).

3. A plate evaporator type reboiler according to claim 1, characterized in that, A manhole (10) is arranged on the kettle shell (5).

4. A plate evaporator type reboiler according to any one of claims 1-3, characterized in that, The plate tube is composed of herringbone corrugated plates, horizontal flat corrugated plates or nodule-shaped plate pieces.

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