Petrochemical heat exchanger

Abstract

The utility model belongs to the technical field of heat exchangers, and particularly relates to a petrochemical heat exchanger. The device comprises a vertically-arranged shell, a first feeding pipe vertically penetrates through the top of the shell, a first discharging pipe vertically penetrates through the bottom of the shell, two partition plates which are horizontally distributed up and down are horizontally arranged in the shell, and a second feeding pipe and a second discharging pipe are arranged on the side wall, between the two partition plates, of the shell in a penetrating mode. A plurality of partition plates are arranged in the shell, a plurality of heat exchange pipes vertically penetrate through the two partition plates, the upper half portion of each heat exchange pipe is provided with a first synergistic assembly used for improving the heat exchange efficiency, the lower half portion of each heat exchange pipe is provided with a second synergistic assembly, and a control assembly used for controlling uniform feeding of each heat exchange pipe is arranged at the position, on the tops of the partition plates, in the shell. According to the heat exchanger, under the action of the control assembly, each heat exchange tube is fed uniformly, the utilization rate of the heat exchange tubes is increased, the heat exchange efficiency is improved, and under the action of the two synergistic assemblies, the heat exchange efficiency is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and particularly relates to a petrochemical heat exchanger. Background Art

[0002] A petrochemical heat exchanger is a device widely used in the process of petrochemical production. It is a device that uses the principle of heat conduction to transfer heat between two fluids at different temperatures through heat conduction to meet the temperature requirements in the production process. Generally, through heat transfer media such as pipelines, the heat of high-temperature substances is transferred to low-temperature substances to make the two reach temperature equilibrium.

[0003] A shell-and-tube heat exchanger is a type of heat exchanger, mainly composed of a shell, a tube bundle, a tube sheet, etc. Parallel tube bundles are installed inside the shell. The raw material enters the shell through the tube bundle and exchanges heat through the medium. However, when feeding, it is easy to have the problem of uneven feeding in each tube bundle, and the liquid distribution in each tube bundle is uneven, without making full use of the tube bundle, resulting in a reduction in heat exchange efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a petrochemical heat exchanger with a simple structure and improved heat exchange efficiency.

[0005] The petrochemical heat exchanger includes a vertically arranged shell. A first feed pipe is vertically penetrated through the top of the shell, and a first discharge pipe is vertically penetrated through the bottom of the shell. Two first partitions are horizontally arranged in the shell in a vertical and upper-lower distribution. A second feed pipe and a second discharge pipe are respectively penetrated through the side wall of the shell between the two first partitions. A number of heat exchange tubes are vertically penetrated through the two first partitions. A first efficiency-enhancing component for improving heat exchange efficiency is arranged on the upper half of each heat exchange tube, and a second efficiency-enhancing component is arranged on the lower half of each heat exchange tube. A control component for controlling the uniform feeding of each heat exchange tube is arranged in the shell above the top of the first partition.

[0006] Further, the control component includes a feed tank horizontally installed in the shell above the first partition. A number of liquid separation tubes are vertically penetrated through the bottom of the feed tank, and the feed end of the heat exchange tube is higher than the discharge end of the liquid separation tube.

[0007] Further, the liquid separation tubes and the heat exchange tubes are arranged at intervals.

[0008] Further, the first efficiency-enhancing component includes a connecting pipe installed on the heat exchange tube. A secondary pipe is penetrated through the side wall of the connecting pipe. A second partition is horizontally arranged in the secondary pipe; one end of the second partition is fixed on the inner side wall of the connecting pipe, and a gap for water flow is left between the other end and the vertical side wall of the secondary pipe. The width of the second partition is equal to the inner diameters of the connecting pipe and the secondary pipe.

[0009] Further, the second efficiency enhancing component includes a deflector plate, which is in a spiral structure, and the side wall of the deflector plate is fixed on the inner side wall of the heat exchange tube.

[0010] Further, the width of the deflector plate is between 3 mm and 5 mm.

[0011] Further, the second feed pipe is installed through the side wall of the housing at the bottom of the upper first partition, and the second discharge pipe is installed through the side wall of the housing at the top of the lower first partition.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] In the present utility model, the raw material enters the housing through the first feed pipe, and the heat exchange medium enters the housing between the two first partitions through the second feed pipe. Under the action of the control component, each heat exchange tube is evenly fed, improving the utilization rate of the heat exchange tube and the heat exchange efficiency. Under the action of the two efficiency enhancing components, the heat exchange efficiency is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is Figure 1 the top view of the auxiliary pipe in

[0016] Figure 3 is Figure 1 the partial enlarged view at A in

[0017] Figure 4 is Figure 1 the partial enlarged view at B in

[0018] The names of the components in the figure: 1, housing; 2, feed trough; 3, first feed pipe; 4, liquid distribution pipe; 5, heat exchange tube; 6, first partition; 7, auxiliary pipe; 8, second partition; 9, connecting pipe; 10, deflector plate; 11, second discharge pipe; 12, first discharge pipe; 13, second feed pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will be further described below with reference to the accompanying drawings through specific embodiments, but it is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present invention. Embodiment

[0020] The petrochemical heat exchanger described in this embodiment, such as Figure 1 , Figure 2 and Figure 3As shown in the figure, it includes a vertically arranged housing 1. A first feed pipe 3 is vertically penetrated through the top of the housing 1. A through hole communicating up and down is opened at the top of the housing 1. The first feed pipe 3 is vertically penetrated in the through hole. The liquid to be temperature-adjusted enters the housing 1 from the first feed pipe 3. The first feed pipe 3 is made of steel pipe;

[0021] A first discharge pipe 12 is vertically penetrated through the bottom of the housing 1. A through hole communicating up and down is opened at the bottom of the housing 1. The first discharge pipe 12 is vertically penetrated in the through hole. The liquid after heat exchange flows out of the housing 1 from the first discharge pipe 12. The first discharge pipe 12 is made of steel pipe;

[0022] Two first partition plates 6 are horizontally arranged in the housing 1 in a vertically distributed manner. The left ends of the two first partition plates 6 are fixed on the left inner side wall of the housing 1, and the right ends are fixed on the right inner side wall of the housing 1. The two first partition plates 6 are horizontally installed in the housing 1 up and down. The two first partition plates 6 divide the middle part of the housing 1 into a heat exchange cavity, and the raw material completes heat exchange in the heat exchange cavity. The first partition plates 6 are made of steel plates;

[0023] The side walls of the housing 1 between the two first partition plates 6 are respectively penetrated with a second feed pipe 13 and a second discharge pipe 11. The heat exchange medium enters the heat exchange cavity from the second feed pipe 13, and the used medium is discharged from the heat exchange cavity through the second discharge pipe 11. Both the second feed pipe 13 and the second discharge pipe 11 are made of steel pipes;

[0024] A number of heat exchange tubes 5 are vertically penetrated through the two first partition plates 6. Through holes communicating up and down are opened on both the two first partition plates 6. The upper end of the heat exchange tube 5 is penetrated in the through hole of the upper first partition plate 6, and the lower end of the heat exchange tube 5 is penetrated in the through hole of the lower first partition plate 6. When the raw material flows through the heat exchange tubes 5, it exchanges heat with the medium in the heat exchange cavity to increase or decrease the temperature of the raw material. The heat exchange tubes 5 are made of steel pipes;

[0025] A connecting pipe 9 is installed on the heat exchange pipe 5. The lower end of the upper half of the connecting pipe 9 is fixed to the upper end of the connecting pipe 9, and the upper end of the lower half of the connecting pipe 9 is fixed to the lower end of the connecting pipe 9. The connecting pipe 9 is connected and communicated with the heat exchange pipe 5. The connecting pipe 9 is made of steel pipe, and the connecting pipe 9 and the heat exchange pipe 5 are connected by welding. A secondary pipe 7 is penetrated through the side wall of the connecting pipe 9, and the secondary pipe 7 is connected and communicated with the connecting pipe 9. A second partition plate 8 is horizontally arranged in the secondary pipe 7, and the second partition plate 8 is horizontally arranged in the secondary pipe 7 and the connecting pipe 9. One end of the second partition plate 8 is fixed to the inner side wall of the connecting pipe 9, and a gap for water flow is left between the other end and the vertical side wall of the secondary pipe 7. One end of the second partition plate 8 is fixed to the inner side wall of the connecting pipe 9, and the other end penetrates into the secondary pipe 7. A gap is left between the movable end of the second partition plate 8 and the vertical side wall of the secondary pipe 7. The width of the second partition plate 8 is equal to the inner diameters of the connecting pipe 9 and the secondary pipe 7. The second partition plate 8 is composed of left and right parts. One part of the second partition plate 8 is located in the connecting pipe 9, and this part of the second partition plate 8 is in a disc structure with a diameter equal to the inner diameter of the connecting pipe 9. The connecting pipe 9 is divided into upper and lower parts by the second partition plate 8 to prevent the raw material from directly passing through the connecting pipe 9. The other end part of the second partition plate 8 extends into the secondary pipe 7, and this part of the second partition plate 8 is in a rectangular structure with a width equal to the inner diameter of the secondary pipe 7, dividing the secondary pipe 7 into upper and lower parts. The second partition plate 8 guides the raw material to flow in the secondary pipe 7, increasing the contact time and contact area between the raw material and the heat exchange medium and improving the heat exchange efficiency. The whole paragraph constitutes the first efficiency-enhancing component for improving the heat exchange efficiency. When the first efficiency-enhancing component is in use, the raw material enters the heat exchange pipe 5 from the upper end of the heat exchange pipe 5. When the raw material flows through the connecting pipe 9 and the secondary pipe 7, under the action of the second partition plate 8, the raw material is guided to flow along the route as Figure 1 shown, increasing the contact area and contact time between the raw material and the heat exchange medium and improving the heat exchange efficiency. Of course, in the first efficiency-enhancing component, the size of the connecting pipe 9 is equal to the size of the heat exchange pipe 5. By using the connecting pipe 9 instead of the heat exchange pipe 5, it is beneficial to the installation of the second partition plate 8.

[0026] A flow guide plate 10 is arranged in the heat exchange pipe 5. The flow guide plate 10 is in a spiral structure, and the side wall of the flow guide plate 10 is fixed to the inner side wall of the heat exchange pipe 5. When the raw material flows through the lower half of the heat exchange pipe 5, under the guiding action of the flow guide plate 10, the raw material presents a turbulent state. Turbulence is a fluid motion state, and its characteristics are that the flow velocity changes irregularly with time and space, showing phenomena such as rotation, mixing, and vortex. Since the velocity and flow state of the fluid will affect the heat transfer efficiency, the fluid in the turbulent state will produce fluid mixing, increasing the intensity of heat diffusion, thereby improving the heat transfer efficiency. The whole paragraph constitutes the second efficiency-enhancing component;

[0027] Inside the housing 1 above the first partition plate 6, a feed trough 2 is horizontally installed. The front end of the feed trough 2 is fixed on the front inner side wall of the housing 1, and the rear end of the feed trough 2 is fixed on the rear inner side wall of the housing 1. The raw material enters the feed trough 2 through the first feed pipe 3. The feed trough 2 is welded by multiple steel plates. Vertically installed through the bottom of the feed trough 2 are several liquid distribution pipes 4. Through holes that communicate up and down are opened at the bottom of the feed trough 2. The upper ends of the liquid distribution pipes 4 are vertically installed in the through holes. The liquid distribution pipes 4 are made of steel pipes. The feed end of the heat exchange pipe 5 is higher than the discharge end of the liquid distribution pipe 4. After the raw material passes through the liquid distribution pipe 4, it accumulates on the top of the upper first partition plate 6. When the liquid level of the raw material is higher than the feed end of the heat exchange pipe 5, the raw material evenly enters several heat exchange pipes 5. The whole paragraph constitutes a control component for controlling the uniform feeding of each heat exchange pipe 5. When the control component is in use, the raw material enters the feed trough 2 through the first feed pipe 3, and then through several liquid distribution pipes 4, it accumulates on the top of the upper first partition plate 6. When the liquid level of the raw material is higher than the feed end of the heat exchange pipe 5, the raw material evenly enters several heat exchange pipes 5, making the feeding speed of each heat exchange pipe 5 equal and improving the utilization efficiency of the heat exchange pipes 5. Of course, the control component can also set the heat exchange pipes 5 as movable structures. The heat exchange pipes 5 slide up and down along the through holes of the first partition plate 6. After all the raw material enters the housing 1, the heat exchange pipes 5 are pulled downwards so that the upper ends of the heat exchange pipes 5 are flush with the top of the first partition plate 6, making all the raw material accumulated on the top of the first partition plate 6 enter the heat exchange pipes 5 to avoid waste of the raw material.

[0028] When this embodiment is in use, the raw material enters the housing 1 through the first feed pipe 3, and the heat exchange medium enters the heat exchange cavity between the two first partition plates 6 through the second feed pipe 13. The uniform feeding of each heat exchange pipe 5 is controlled by the control component to improve the utilization efficiency of the heat exchange pipes 5. When the raw material flows through the heat exchange cavity, heat exchange is carried out with the heat exchange medium to increase or decrease the temperature of the raw material. The heat exchange efficiency of the raw material is improved by two efficiency enhancement components. After heat exchange, the raw material is discharged from the housing 1 through the first discharge pipe 12, and the used medium is discharged from the heat exchange cavity through the second discharge pipe 11. Embodiment

[0029] This embodiment further illustrates the technology, as Figure 1 shown, the liquid distribution pipes 4 and the heat exchange pipes 5 are distributed at intervals, and the liquid distribution pipes 4 and the heat exchange pipes 5 are staggered to prevent the raw material from directly flowing into the heat exchange pipes 5 after passing through the liquid distribution pipes 4, ensuring the uniform feeding of each heat exchange pipe 5. Embodiment

[0030] This embodiment will further illustrate the technology. The width of the flow guide plate 10 is between 3 mm and 5 mm. In a small heat exchanger, the inner diameter of the heat exchange tube is generally 20 mm, and the width of the flow guide plate 10 is one-fifth of the inner diameter of the heat exchange tube 5. The space vacated in the middle of the flow guide plate 10 does not affect the normal flow of the raw material. At the same time, the flow guide plate 10 with a certain width can play a role in guiding the raw material, causing the raw material to generate a turbulent state in the heat exchange tube 5. The width of the flow guide plate 10 can be determined to be 3 mm, 5 mm, 4 mm, or any width between 3 mm and 5 mm. Embodiment

[0031] This embodiment will further illustrate the technology, as Figure 1 shown, the second feed pipe 13 is installed on the side wall of the housing 1 at the bottom of the upper first partition 6, and the second discharge pipe 11 is installed on the side wall of the housing 1 at the top of the lower first partition 6. The housing 1 between the two first partitions 6 is a heat exchange cavity, and the heat exchange medium is located in the heat exchange cavity. The second feed pipe 13 is installed at the top of the side wall of the heat exchange cavity, which is conducive to the heat exchange medium entering the heat exchange cavity, and the second discharge pipe 11 is installed at the bottom of the side wall of the heat exchange cavity, which is conducive to the discharged medium after use leaving the heat exchange cavity.

Claims

1. A petrochemical heat exchanger, comprising a vertically arranged shell (1), a first feed pipe (3) vertically passing through the top of the shell (1), and a first discharge pipe (12) vertically passing through the bottom of the shell (1), characterized in that: Two first baffles (6) are horizontally arranged in the shell (1) and are distributed horizontally in an upper and lower direction. A second feed pipe (13) and a second discharge pipe (11) are respectively installed on the side wall of the shell (1) between the two first baffles (6). A plurality of heat exchange tubes (5) are vertically installed on the two first baffles (6). A first efficiency enhancement component for improving heat exchange efficiency is arranged on the upper half of each heat exchange tube (5), and a second efficiency enhancement component is arranged on the lower half of each heat exchange tube (5). A control component for controlling uniform feeding of each heat exchange tube (5) is arranged in the shell (1) at the top of the first baffle (6).

2. The petrochemical heat exchanger according to claim 1, characterized in that: The control assembly comprises a feed trough (2), the feed trough (2) being horizontally mounted in the housing (1) above the first partition plate (6), a plurality of liquid distribution pipes (4) being vertically mounted through the bottom of the feed trough (2), and a feed end of the heat exchange tube (5) being higher than a discharge end of the liquid distribution pipe (4).

3. The petrochemical heat exchanger according to claim 2, characterized in that: The liquid separation tube (4) and the heat exchange tube (5) are distributed at intervals.

4. The petrochemical heat exchanger according to claim 1, characterized in that: The first enhancement component comprises a connecting pipe (9), the connecting pipe (9) being mounted on the heat exchange pipe (5), a secondary pipe (7) being passed through the side wall of the connecting pipe (9), and a second baffle (8) being horizontally arranged inside the secondary pipe (7); one end of the second baffle (8) being fixed to the inner side wall of the connecting pipe (9), and a gap for water flow to pass between the other end and the vertical side wall of the secondary pipe (7), and the width of the second baffle (8) being equal to the inner diameter of the connecting pipe (9) and the secondary pipe (7).

5. The petrochemical heat exchanger according to claim 1, characterized in that: The second efficiency enhancement component comprises a guide plate (10), the guide plate (10) being in a spiral structure, and the side wall of the guide plate (10) being fixed on the inner side wall of the heat exchange tube (5).

6. The petrochemical heat exchanger according to claim 5, characterized in that: The width of the guide plate (10) is between 3 mm and 5 mm.

7. The petrochemical heat exchanger according to claim 1, characterized in that: The second feed pipe (13) is installed on the side wall of the shell (1) at the bottom of the upper first partition (6), and the second discharge pipe (11) is installed on the side wall of the shell (1) at the top of the lower first partition (6).

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