Heat exchange equipment for o-chlorophenylglycine production

Abstract

A heat exchange device used in the production of o-chlorophenylglycine, relates to the field of chemical heat exchange equipment, includes a shell, heat exchange tubes, tube sheets and heads, and also includes a diverter box; the shell has two sections, each of the two sections of the shell has an end fixedly connected to the diverter box, each of the two sections of the shell is provided with a group of heat exchange tubes, and the two ends of the heat exchange tubes are respectively connected to the diverter box and the tube sheets at the end of the shell; a partition is provided inside the diverter box, and the partition separates the inside of the diverter box into a mutually independent feed chamber and a discharge chamber. The present invention changes the heat exchange tubes in the tubular heat exchanger from one group to two groups, which is equivalent to cutting the existing length of the heat exchange tubes into two sections. The heat exchange tubes are shortened by such a design, and then the cleaning difficulty of the heat exchange tubes is reduced without reducing the heat exchange effect and increasing the space occupied, and the vibration wear of the heat exchange tubes is slowed down, while avoiding the need to set an expansion joint on the shell to avoid the expansion joint weakening the pressure bearing capacity of the shell.

Description

Technical Field

[0001] The invention belongs to the field of chemical heat exchange equipment, and in particular relates to a heat exchange equipment used in the production of o-chlorophenylglycine. Background Art

[0002] Heat exchange equipment is a common type of equipment in the chemical industry. In the chemical industry, heat exchange equipment is usually used to provide energy for core process units and heat or cool raw materials, intermediate products and final products to specified temperatures, improve production efficiency, improve energy efficiency, and reduce energy consumption in chemical processes. In the industrial production process of o-chlorophenylglycine, heating or cooling of feed liquid and medium is often involved, so heat exchange equipment is a necessary equipment for the production of o-chlorophenylglycine.

[0003] The most common heat exchange equipment is the tubular heat exchanger, whose structure includes a shell and heat exchange tubes arranged inside the shell. The two media for heat exchange flow through the inner and outer sides of the heat exchange tubes respectively, thereby realizing heat exchange through the tube wall of the heat exchange tube.

[0004] The problems existing in the prior art are:

[0005] In the existing tubular heat exchanger, a tube sheet is connected to each end of the heat exchange tube, and the two ends of the heat exchange tube are fixedly connected to the shell of the tubular heat exchanger through the two tube sheets. At the same time, a large tubular heat exchanger is used in the production of o-chlorophenylglycine, and the length of the heat exchange tube inside is relatively large, which leads to problems such as difficulty in cleaning the inside of the heat exchange tube and vibration and wear of the heat exchange tube.

[0006] In addition, in the prior art, when the length of the heat exchange tube is large, an expansion joint needs to be provided on the shell to avoid excessive stress concentration after thermal expansion and contraction of the heat exchange tube, and the provision of the expansion joint will significantly weaken the pressure bearing capacity of the shell. Summary of the invention

[0007] The object of the present invention is to provide a heat exchange device used in the production of o-chlorophenylglycine. Without reducing the heat exchange effect of the tubular heat exchanger and increasing the space occupied, the structure of the existing tubular heat exchanger is improved to reduce the difficulty of cleaning the heat exchange tubes and slow down the vibration and wear of the heat exchange tubes. At the same time, it is avoided to set an expansion joint on the shell to avoid the expansion joint weakening the pressure bearing capacity of the shell.

[0008] The technical problem solved by the present invention is achieved by the following technical scheme: The present invention provides a heat exchange device applied to the production of o-chlorophenylglycine, comprising a shell, a heat exchange tube, a tube sheet and a head, wherein the heat exchange tube is located on the inner side of the shell, and the tube sheet is fixedly connected to the end of the shell and the end of each heat exchange tube at the same time, and the end of the shell and the tube sheet are provided with a head corresponding to each other, and the internal space of each heat exchange tube is connected with the inner space of the head, and the channel inside the heat exchange tube and the part intersecting with the two ends thereof are called the tube side, and the channel outside the heat exchange tube and the part intersecting with the two ends thereof are called the shell side, and the two fluids flowing through the tube side and the shell side respectively realize heat exchange through the tube wall of the heat exchange tube;

[0009] Also includes a shunt box;

[0010] The shell has two sections, each of which has an end fixedly connected to the diverter box. A group of heat exchange tubes are arranged in each of the two sections of the shell, and the two ends of the heat exchange tubes are respectively connected to the diverter box and the tube sheet at the end of the shell, and the internal space of the heat exchange tubes is respectively connected to the internal space of the head and the internal space of the diverter box;

[0011] A partition is provided inside the diverter box, which separates the inside of the diverter box into a feed chamber and a discharge chamber that are independent of each other. A tube fluid inlet is provided on the outside of the feed chamber, and a tube fluid outlet is provided on the outside of the discharge chamber. In each group of heat exchange tubes, a heat exchange tube is connected to the feed chamber or the discharge chamber, so that the feed chamber and the discharge chamber are connected through the two groups of heat exchange tubes in the two sections of the shell;

[0012] A shell fluid inlet and a shell fluid outlet are arranged on the outer side of the shell.

[0013] As a preferred solution, the axes of the two sections of the shell coincide with each other, that is, the two sections of the shell are respectively connected to the two sides of the diverter box.

[0014] As a preferred solution, the axes of the two sections of the shell form an angle of 90 degrees with each other.

[0015] As a preferred solution, the outer sides of the two sections of the shell are each provided with a shell fluid inlet and a shell fluid outlet.

[0016] As a preferred solution, the outer sides of the two sections of the shell are provided with a shell fluid inlet and a shell fluid outlet, and the shell fluid inlet and the shell fluid outlet are respectively provided on the two sections of the shell;

[0017] A connecting pipe for connecting the inner spaces of the two shell sections is arranged in the diverter box.

[0018] As a preferred solution, there is only one partition, which is horizontally arranged in the diversion box. The spaces on the upper and lower sides of the partition are the feed chamber and the discharge chamber respectively. By arranging the partition in this way, the two groups of heat exchange tubes in the two sections of the shell can be connected in parallel between the feed chamber and the discharge chamber.

[0019] As a preferred solution, there are two partitions, which divide the internal space of the diverter box into three independent spaces, two of which are the feed cavity and the discharge cavity, and the third is a connecting cavity.

[0020] In the two groups of heat exchange tubes in the two sections of the shell, half of the heat exchange tubes in each group are connected to the connecting cavity, and the remaining half of the heat exchange tubes in each group are connected to the feed cavity and the discharge cavity respectively;

[0021] By arranging the partition in the above manner, the two groups of heat exchange tubes in the two sections of the shell can be connected in series between the feed cavity and the discharge cavity.

[0022] As a preferred solution, the diverter box includes a box body and a channel converter, the shell and the heat exchange tube are connected to the box body, the top of the box body is provided with an opening, the channel converter is inserted into the box body through the opening and fixed by a fastener;

[0023] The partition and each chamber separated by the partition are arranged inside the channel converter.

[0024] As a preferred solution, the box body is processed with a stepped through hole corresponding to the end of the heat exchange tube, and the end of the heat exchange tube passes through the stepped through hole;

[0025] The end of the heat exchange tube is processed with a flange structure, one side of the flange structure abuts against the step surface of the stepped through hole, and the other side of the flange structure is provided with a sealing ring;

[0026] The surface of the channel converter facing the end of the heat exchange tube is a slope, and correspondingly, a slope is processed on the side of the sealing ring facing the channel converter. During the insertion of the channel converter into the box, the slope on the box squeezes the sealing ring, thereby achieving sealing between the channel converter and the heat exchange tube.

[0027] The present invention improves the prior art and produces the following effects:

[0028] 1. The present invention changes the shell and heat exchange tubes in the tubular heat exchanger from one group to two groups, which is equivalent to cutting the existing length of the heat exchange tube into two sections. Through such a design, the heat exchange tube is shortened, and then the cleaning difficulty of the heat exchange tube is reduced without reducing the heat exchange effect and increasing the space occupation, and the vibration wear of the heat exchange tube is reduced. At the same time, it is avoided to set an expansion joint on the shell to prevent the expansion joint from weakening the pressure bearing capacity of the shell.

[0029] In addition, in the prior art, due to the difficulty in assembly, the tubular heat exchanger cannot be set into a 90-degree bend shape. In the present invention, the two shell sections can be respectively connected to two surfaces of the diverter box that are at an angle of 90 degrees to each other, thereby overcoming the technical obstacles in the prior art, so that the overall shape of the tubular heat exchanger can be flexibly changed by replacing the diverter box, and at the same time, the layout of the pipelines connected to the tubular heat exchanger is more compact, which is conducive to the adaptation and flexible layout of the installation space.

[0030] 2. In the present invention, a detachable and replaceable channel converter is provided on the diverter box, and the partition and each chamber separated by the partition are arranged inside the channel converter. By replacing the channel converter with a different partition structure, the two groups of heat exchange tubes in the two sections of the shell can be switched between series and parallel, thereby changing the residence time of the fluid in the heat exchange tube under the condition that other working conditions remain unchanged, and realizing a significant adjustment of the heat exchange performance index of the tubular heat exchanger. The significance of adjusting the heat exchange performance index is:

[0031] When installing or replacing a tubular heat exchanger, civil engineering is required and the construction process is cumbersome. When the performance indicators of a tubular heat exchanger change significantly, the heat exchange performance can be quickly re-matched with other production links and production parameters without replacing the tubular heat exchanger (only the channel converter needs to be replaced), so that the entire set of production equipment can be quickly converted to produce other products with similar production conditions and different heat exchange performance requirements.

[0032] 3. The present application sets a detachable channel converter in the diverter box. On the basis of this structure, the inclined surface on the outside of the diverter box is used to compress the sealing ring to achieve sealing. It is a detachable connection to facilitate the replacement of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention.

[0034] Figure 2 It is a schematic structural diagram of a second embodiment of the present invention.

[0035] Figure 3 Schematic diagram of the structure of the third embodiment of the present invention

[0036] Figure 4 It is a schematic structural diagram of a fourth embodiment of the present invention.

[0037] Figure 5 yes Figure 4 A partial enlarged view of point A in the middle.

[0038] Figure 6 is Figure 4 Schematic diagram of the improved structure.

[0039] Figure 7 It is a schematic structural diagram of a fifth embodiment of the present invention.

[0040] Figure 8 It is a schematic structural diagram of a sixth embodiment of the present invention.

[0041] Fig. 9 It is a schematic diagram of the structure of the existing tubular heat exchanger which is the basis for the improvement of the present invention.

[0042] Fig.10 It is a schematic diagram of the structure after three shell sections and a diverter box are combined into a T shape.

[0043] Fig.11 It is a schematic diagram of the structure after four shell sections and a diverter box are combined into a cross shape.

[0044] Fig.12 It is a schematic diagram of the structure after three sections of the shell and two diverter boxes are combined into a straight line shape.

[0045] In the figure, 1, head, 2, tube fluid inlet, 3, partition, 4, shell fluid inlet, 5, tube sheet, 6, shell, 7, heat exchange tube, 8, expansion joint, 9, shell fluid outlet, 10, tube fluid outlet, 11, feed cavity, 12, discharge cavity, 13, diverter box, 14, channel converter, 15, connecting pipe, 16, sealing ring, 17, flange, 18, inclined surface. DETAILED DESCRIPTION

[0046] The present invention is further described below in conjunction with the accompanying drawings:

[0047] Embodiment 1: Figure 1 As shown, this embodiment includes a shell 6, a heat exchange tube 7, a tube sheet 5 and a head 1. The heat exchange tube 7 is located on the inner side of the shell 6. The tube sheet 5 is fixedly connected to the end of the shell 6 and the end of each heat exchange tube 7. The end of the shell 6 and the tube sheet 5 are correspondingly provided with a head 1. The internal space of each heat exchange tube 7 is connected with the inner space of the head 1. The channel inside the heat exchange tube 7 and the part intersecting with the two ends thereof are called the tube side. The fluid flowing through the tube side is called the tube fluid. The channel outside the heat exchange tube 7 and the part intersecting with the two ends thereof are called the shell side. The fluid flowing through the shell side is called the shell fluid. The tube fluid and the shell fluid realize heat exchange through the tube wall of the heat exchange tube 7.

[0048] The above structures already exist in Fig. 9 The conventional prior art is shown in the figure, so it will not be described here in detail.

[0049] like Figure 1As shown, in this embodiment, a diverter box 13 is provided, the shell 6 has two sections, each of the two sections of the shell 6 has an end fixedly connected to the diverter box 13, and a group of heat exchange tubes 7 are provided in each of the two sections of the shell 6, and the two ends of each heat exchange tube 7 are respectively connected to the diverter box 13 and the tube sheet 5 at the end of the shell 6, and the internal space of the heat exchange tube 7 is respectively connected to the internal space of the head 1 and the internal space of the diverter box 13; a partition 3 is provided inside the diverter box 13, and the partition 3 separates the inside of the diverter box 13 into a feed chamber 11 and a discharge chamber 12 that are independent of each other, and a tube fluid inlet 2 is provided on the outside of the feed chamber 11, and a tube fluid outlet 10 is provided on the outside of the discharge chamber 12. In each group of heat exchange tubes 7, there is a heat exchange tube 7 that is connected to the feed chamber 11 or the discharge chamber 12, so that the feed chamber 11 and the discharge chamber 12 are connected through the two groups of heat exchange tubes 7 in the two sections of the shell 6.

[0050] Such a design shortens the heat exchange tube 7, thereby reducing the difficulty of cleaning the heat exchange tube 7 and slowing down the vibration wear of the heat exchange tube 7 without reducing the heat exchange effect and increasing the space occupied. At the same time, it is avoided to set the expansion joint 8 on the shell 6 to prevent the expansion joint 8 from weakening the pressure bearing capacity of the shell 6.

[0051] During operation, the fluid (tube fluid) entering the diverter box 13 first enters the feed chamber 11 inside the diverter box 13, and then is distributed to each heat exchange tube 7. After the tube fluid flows through each heat exchange tube 7, it converges into the discharge chamber 12 inside the diverter box 13, and then flows out of the tubular heat exchanger.

[0052] like Figure 1 As shown, the outer side of the shell 6 is provided with a shell fluid inlet 4 and a shell fluid outlet 9. During operation, the fluid (shell fluid) entering the shell 6 from the shell fluid inlet 4 contacts and exchanges heat with the outer wall of each heat exchange tube 7 in the shell 6, and then flows out from the shell fluid outlet 9. In this embodiment, the outer sides of the two sections of the shell 6 are each provided with a shell fluid inlet 4 and a shell fluid outlet 9. When in use, it is necessary to connect the shell fluid outlet 9 on one section of the shell 6 with the shell fluid inlet 4 on the other section of the shell 6 through a pipeline, so as to connect the shells in the two sections of the shell 6 in series.

[0053] like Figure 1 As shown, in this embodiment, the axes of the two sections of the shell 6 coincide with each other, that is, the two sections of the shell 6 are respectively connected to the two sides of the diverter box 13.

[0054] In this embodiment, there is only one partition 3, which is horizontally arranged in the diverter box 13. The spaces on the upper and lower sides of the partition 3 are respectively the feed chamber 11 and the discharge chamber 12. At the same time, the two groups of heat exchange tubes 7 are equally divided into upper and lower parts by the partition 3. The heat exchange tube 7 on the upper side of the partition 3 is connected to the feed chamber 11. After the tube fluid enters the feed chamber 11, it enters the heat exchange tube 7 connected to the feed chamber 11 from the left and right directions, and then reaches the inner space of the left and right heads 1. Then, the tube fluid flows through the heat exchange tube 7 connected to the discharge chamber 12 and enters the discharge chamber 12. Therefore, in this embodiment, the two groups of heat exchange tubes 7 in the two-stage shell 6 are connected in parallel.

[0055] Embodiment 2: Figure 2 As shown, in some embodiments, by simply adjusting the connection position of the shell 6 on the diverter box 13, it is easy to connect the two sections of the shell 6 to the two surfaces of the diverter box 13 that are at an angle of 90 degrees to each other, so that the overall shape of the tubular heat exchanger can be flexibly changed by replacing the diverter box 13, which is conducive to the adaptation and flexible layout of the installation space.

[0056] In fact, in addition to the two-stage housing 6 at 90 degrees to each other, a three-stage housing 6 can be arranged with the diverter box 13 as the center (such as Fig.10 As shown), four-section housing 6 (as Fig.11 As shown in FIG. 1 ), multiple housings 6 and multiple diverter boxes 13 can also be connected in series alternately to form a straight line (as shown in FIG. Fig.12 As shown in FIG. 1 ), the multi-segment shell 6 and the plurality of diverter boxes 13 can also be arbitrarily combined in a straight line combination mode and a bent combination mode to form a combined heat exchanger of a specific shape that meets specific space requirements. During the implementation process, the partition 3 can be set in the diverter box 13 as required to achieve overall series or parallel connection, or partial series or parallel connection. There is no technical difficulty in setting the partition 3, which will not be described in detail here.

[0057] Embodiment 3: Figure 3 As shown, in this embodiment, the outer sides of the two sections of the shell 6 are provided with a shell fluid inlet 4 and a shell fluid outlet 9, and the shell fluid inlet 4 and the shell fluid outlet 9 are respectively provided on the two sections of the shell 6. The shell fluid inlet 4 and the shell fluid outlet 9 are used to achieve the communication between the internal spaces of the two sections of the shell 6 and the outside. The diverter box 13 is provided with a connecting pipe 15 for connecting the internal spaces of the two sections of the shell 6, so as to connect the internal spaces of the two sections of the shell 6 in series.

[0058] Embodiment 4: Figure 4 As shown, this embodiment and Figure 1The key difference between the illustrated embodiments is that in Embodiment 1, the two groups of heat exchange tubes 7 in the two-section shell 6 are connected in parallel, while in this embodiment, by changing the arrangement of the partition 3, the two groups of heat exchange tubes 7 in the two-section shell 6 are connected in series between the feed chamber 11 and the discharge chamber 12. Under the condition that other conditions remain constant, the time for the tube fluid to pass through the tube path is changed, thereby changing the performance parameters of the tubular heat exchanger to adapt to the heat exchange requirements in different scenarios.

[0059] In this embodiment, the diverter box 13 includes a box body and a channel converter 14, the shell 6 and the heat exchange tube 7 are connected to the box body, the top of the box body is provided with an opening, the channel converter 14 is inserted into the box body through the opening, and is fixed by fasteners; the partition 3 and each chamber separated by the partition 3 are arranged inside the channel converter 14. When applied, by replacing the channel converter 14 with different partition 3 structures, the two groups of heat exchange tubes 7 in the two sections of the shell 6 can be switched between series connection and parallel connection, thereby changing the residence time of the fluid in the heat exchange tube 7 in the heat exchange tube 7, and realizing the adjustment of the heat exchange performance index of the tubular heat exchanger.

[0060] like Figure 4 and 5 As shown, in this embodiment, the box body is processed with a stepped through hole corresponding to the end of the heat exchange tube 7, and the end of the heat exchange tube 7 passes through the stepped through hole; the end of the heat exchange tube 7 is processed with a flange 17 structure, one side of the flange 17 structure abuts against the stepped surface of the stepped through hole, and the other side of the flange 17 structure is provided with a sealing ring 16; the surface of the channel converter 14 facing the end of the heat exchange tube 7 is a slope 18, and correspondingly, the sealing ring 16 is processed with a slope 18 on the side facing the channel converter 14. During the insertion of the channel converter 14 into the box body, the slope 18 on the box body squeezes the sealing ring 16, and then realizes the sealing between the channel converter 14 and the heat exchange tube 7. The present application sets a detachable channel converter 14 in the diverter box 13. On the basis of this structure, the slope 18 on the outer side of the diverter box 13 is used to press the sealing ring 16 to achieve sealing. It is a detachable connection, which is convenient for replacing the heat exchange tube 7.

[0061] During specific implementation, the material of the sealing ring 16 can be selected according to the sealing requirements, and specific materials include conventional hard sealing materials such as copper and polytetrafluoroethylene.

[0062] In specific implementation, each sealing ring can be attached to a thin plate with a thickness not exceeding 0.5 mm (such as a polytetrafluoroethylene plate or a copper plate, and a through hole corresponding to the heat exchange tube should be left on the thin plate to facilitate liquid passage). In this way, all sealing rings can be installed quickly and the inclined surface on the sealing ring can be ensured to be in the correct position in the installation hole.

[0063] like Figure 6As shown, as a more preferred solution, during implementation, the end of the heat exchange tube 7 can be extended into the inner side of the sealing ring 16 to support the inner side of the sealing ring 16 and prevent the sealing ring 16 from being crushed.

[0064] Embodiment 5: Figure 7 As shown, this embodiment and Figure 4 The embodiment shown differs in the way the partition wall 3 is arranged.

[0065] like Figure 7 As shown, in this embodiment, there are two partitions 3, and the two partitions 3 divide the internal space of the diverter box 13 into three independent spaces, two of which are the feed chamber 11 and the discharge chamber 12, and the third independent space is a connecting chamber; in the two groups of heat exchange tubes 7 in the two-section shell 6, half of the heat exchange tubes 7 in each group of heat exchange tubes 7 are connected to the connecting chamber, and the remaining half of the heat exchange tubes 7 in each group of heat exchange tubes 7 are connected to the feed chamber 11 and the discharge chamber 12, respectively.

[0066] During operation, after the tube fluid enters the feed cavity 11, it enters a portion of the heat exchange tubes 7 in the left shell 6, and then reaches the inner space of the left end head 1, and then enters the connecting cavity through a portion of the heat exchange tubes 7 in the left shell 6; the tube fluid entering the connecting cavity enters a portion of the heat exchange tubes 7 in the right shell 6, and then reaches the inner space of the right end head 1, and then enters the discharge cavity 12 through another portion of the heat exchange tubes 7 in the right shell 6. It can be seen that in this embodiment, the two groups of heat exchange tubes 7 in the two sections of the shell 6 are connected in series.

[0067] It should be noted that when the series connection is adopted, the heat exchange conditions of the left and right shell groups are different, among which:

[0068] The tube fluid first flows through the left shell, and the left shell participates in heat exchange first. In the early stage of heat exchange, the temperature difference between the inside and outside of the heat exchange tube is large, and the thermal stress of the heat exchange tube is also large; the tube fluid then flows through the right shell, and the right shell participates in heat exchange later. In the later stage of heat exchange, the temperature difference between the inside and outside of the heat exchange tube is small, and the thermal stress of the heat exchange tube is also small. In this case, when it is necessary to increase the heat exchange area by lengthening the heat exchange tube, the length of the right heat exchange tube can be increased first, so as to avoid the problem of excessive thermal stress of the heat exchange tube after the heat exchange tube is lengthened.

[0069] Example 6: Figure 8 As shown, this embodiment and Figure 7 The embodiment shown differs in the way the partition wall 3 is arranged.

[0070] like Figure 8 As shown, Figure 7The same thing is that two partitions 3 are also provided in this embodiment, and the discharge chamber 12, the connecting chamber and the discharge chamber 12 are also separated by the two partitions 3. The difference is that the positions of the partitions 3 and the pipe fluid outlet 10 are adjusted.

Claims

1. A heat exchange device for use in the production of o-chlorophenylglycine, comprising a shell (6), a heat exchange tube (7), a tube sheet (5) and a head (1), wherein the heat exchange tube (7) is located on the inner side of the shell (6), the tube sheet (5) is fixedly connected to the end of the shell (6) and the end of each heat exchange tube (7), the end of the shell (6) and the tube sheet (5) are provided with a head (1) corresponding to each other, the internal space of each heat exchange tube (7) is connected to the internal space of the head (1), the channel inside the heat exchange tube (7) and the part intersecting with the two ends thereof are called the tube side, and the channel outside the heat exchange tube (7) and the part intersecting with the two ends thereof are called the shell side, and the two fluids flowing through the tube side and the shell side respectively exchange heat through the tube wall of the heat exchange tube (7), characterized in that: Also includes a shunt box (13); The shell (6) has two sections, each of which has an end fixedly connected to the diverter box (13). A group of heat exchange tubes (7) are arranged in each of the two sections of the shell (6). The two ends of each heat exchange tube (7) are respectively connected to the diverter box (13) and the tube sheet (5) at the end of the shell (6), and the internal space of the heat exchange tube (7) is respectively connected to the internal space of the head (1) and the internal space of the diverter box (13); A partition (3) is provided inside the flow dividing box (13), and the partition (3) divides the inside of the flow dividing box (13) into a feed chamber (11) and a discharge chamber (12) which are independent of each other; a tube fluid inlet (2) is provided on the outside of the feed chamber (11), and a tube fluid outlet (10) is provided on the outside of the discharge chamber (12); in each group of heat exchange tubes (7), one heat exchange tube (7) is connected to the feed chamber (11) or the discharge chamber (12), so that the feed chamber (11) and the discharge chamber (12) are connected through the two groups of heat exchange tubes (7) in the two-stage shell (6); The outer side of the shell (6) is provided with a shell fluid inlet (4) and a shell fluid outlet (9); There is only one partition plate (3), which is arranged horizontally in the diverter box (13), and the spaces on the upper and lower sides of the partition plate (3) are the feed chamber (11) and the discharge chamber (12), respectively. By arranging the partition plate (3) in this way, the two groups of heat exchange tubes (7) in the two sections of the shell (6) can be connected in parallel between the feed chamber (11) and the discharge chamber (12); The diverter box (13) comprises a box body and a channel converter (14), the shell (6) and the heat exchange tube (7) are both connected to the box body, the top of the box body is provided with an opening, the channel converter (14) is inserted into the box body through the opening, and is fixed by a fastener; The partition (3) and the chambers separated by the partition (3) are all arranged inside the channel converter (14).

2. A heat exchange device for use in the production of o-chlorophenylglycine according to claim 1, characterized in that: The box body is machined with a stepped through hole corresponding to the end of the heat exchange tube (7), and the end of the heat exchange tube (7) passes through the stepped through hole; The end of the heat exchange tube (7) is processed with a flange (17) structure, one side of the flange (17) structure abuts against the step surface of the stepped through hole, and the other side of the flange (17) structure is provided with a sealing ring (16); The surface of the channel converter (14) facing the end of the heat exchange tube (7) is a bevel (18), and correspondingly, a bevel (18) is processed on the side of the sealing ring (16) facing the channel converter (14). When the channel converter (14) is inserted into the box, the bevel (18) on the box squeezes the sealing ring (16), thereby achieving sealing between the channel converter (14) and the heat exchange tube (7).

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