A combined cooling condenser

Abstract

This application discloses a combined cooling condenser, including a left tube box, a right tube box, a heat exchange tube bundle, and a horizontal shell. The left and right tube boxes are axially connected to both ends of the horizontal shell. Each tube box includes a closed housing with a partition and an inner tube sheet inside. The left tube box is divided into first and second inlet chambers and first and second outlet chambers by the partition and the inner tube sheet. The right tube box is divided into third and fourth outlet chambers and third and fourth inlet chambers by the partition and the inner tube sheet. The heat exchange tube bundle consists of heat exchange sleeves, which include inner and outer tubes. The first and second inlet chambers are connected to the third and fourth outlet chambers through the outer tubes, respectively. The third and fourth inlet chambers are connected to the first and second outlet chambers through the inner tubes, respectively. The shell is divided into first, second, and third shell passes by a head assembly. The condenser of this application has a dual-tube-pass, multi-shell-pass heat exchange structure, high heat exchange efficiency, compact structure, and high safety.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, specifically to a combined cooling condenser. Background Technology

[0002] Existing ammonia synthesis methods generally employ a single-tower circulation system. For example, Chinese patent CN105883852A discloses an ammonia synthesis reaction system comprising: an ammonia synthesis tower, a combined waste heat boiler, a feedwater heater, a circulating gas heat exchanger, a water cooler, a combined ammonia cooler, a diammonium cooler, an ammonia separator, a liquid ammonia tank, and a circulating machine. Gas preheated in the circulating gas heat exchanger enters the ammonia synthesis tower, and the reacted gas directly enters the combined waste heat boiler from the bottom of the ammonia synthesis tower. The gas circulation ratio in a single-tower process is typically 3.0–3.8, resulting in a large gas circulation volume, low ammonia net value in the synthesis tower, and low operating efficiency.

[0003] To address the aforementioned technical problems, the applicant filed a patent application on March 28, 2024, for a bipolar single-cycle ammonia synthesis method (patent number CN118145674A). This method features low ammonia circulation volume, high synthesis tower operating efficiency, high catalyst reaction efficiency, and low cycle power consumption. The combined cooling condenser used in this method can effectively reduce the ammonia temperature during ammonia separation; however, this combined cooling condenser has a complex structure, and the heat exchange efficiency of the cold exchange unit is low. Utility Model Content

[0004] To address the problems existing in CN118145674A, this application proposes a novel combined cooling condenser.

[0005] The technical solution adopted in this application is:

[0006] A combined cooling condenser includes a left tube box, a right tube box, a heat exchange tube bundle, and a horizontal shell. The left tube box and the right tube box are axially connected to the left and right ends of the horizontal shell, respectively.

[0007] Both the left and right pipe boxes consist of cylindrical boxes that are closed at both ends by end plates and outer pipe plates, and the boxes are equipped with partitions and inner pipe plates.

[0008] The left side tube box is divided into a first air inlet chamber, a second air inlet chamber, a first air outlet chamber, and a second air outlet chamber by a partition and an inner tube plate;

[0009] The right-side tube box is divided into a third air outlet chamber, a fourth air outlet chamber, a third air inlet chamber, and a fourth air inlet chamber by a partition and an inner tube plate;

[0010] Each air inlet chamber is equipped with an air inlet pipe, and each air outlet chamber is equipped with an air outlet pipe.

[0011] The heat exchange tube bundle consists of several heat exchange sleeves extending axially along the shell. Each heat exchange sleeve includes an inner tube and an outer tube. The outer tube is fitted over the inner tube and has an annular flow channel between it and the inner tube wall. The two ends of the inner tube extend to the left and right side tube boxes and are fixed to the inner tube plate, respectively. The two ends of the outer tube extend to the left and right side tube boxes and are fixed to the outer tube plate, respectively.

[0012] The first and second air intake chambers are connected to the third and fourth air outlet chambers respectively via external pipes;

[0013] The third and fourth air intake chambers are connected to the first and second air outlet chambers respectively through inner tubes;

[0014] The shell is divided into a first shell side, a second shell side, and a third shell side by a first head assembly and a second head assembly; the first shell side, the second shell side, and the third shell side are respectively provided with a refrigerant inlet and a refrigerant outlet.

[0015] Furthermore, the heat exchange tube bundle is located in the lower middle part of the horizontal shell; the left and right tube boxes are arranged coaxially, and the center line of the tube boxes is located below the center line of the shell.

[0016] By adopting the above technical solution, the shell-side space above the heat exchanger tube bundle can be increased, thereby improving operational safety.

[0017] Furthermore, the baffle is L-shaped, with one end extending horizontally along the center line of the tube box to the outer tube sheet, and the other end extending vertically upward to the inner wall of the tube box, dividing the inner cavity of the tube box into an upper cavity and a lower cavity; the horizontal part of the inner tube sheet and the baffle cross each other, dividing the upper cavity and the lower cavity into two air inlet chambers and two air outlet chambers.

[0018] The heat exchange tube bundle is divided into upper and lower parts by a partition. The upper part of the heat exchange tube bundle is used to cool the ammonia gas after water cooling in the secondary ammonia synthesis reaction, and the lower part of the heat exchange tube bundle is used to cool the ammonia gas after water cooling in the primary ammonia synthesis reaction.

[0019] Furthermore, both the left and right tube boxes are equipped with a first baffle plate, which is fixed to the inner tube sheet by a tie rod; the first baffle plate is a single-arch baffle plate.

[0020] The first baffle plate can improve the heat exchange efficiency inside the tube box.

[0021] Furthermore, a second baffle, a third baffle, and a fourth baffle are respectively provided in the first shell side, the second shell side, and the third shell side. The second baffle, the third baffle, and the fourth baffle are respectively supported on the bottom wall of the shell by brackets. The second baffle, the third baffle, and the fourth baffle are all support plates.

[0022] The installation of baffles can improve the heat exchange efficiency of the shell side.

[0023] Furthermore, the top of the first, second, and third shells are equipped with a safety valve interface, a vent, a gaseous refrigerant outlet, and a pressure gauge interface; the bottom of each is equipped with a drain outlet and a liquid refrigerant inlet; the sides are equipped with a manhole and a level gauge interface; and the bottom of the second and third shells is equipped with a nitrogen inlet.

[0024] Safety valves are used to ensure operational safety; vent ports are used to release gas from the shell side during maintenance; drain ports are used to release liquid from the shell side during maintenance; level gauges are used to monitor the liquid refrigerant level; pressure gauges are used to monitor the pressure of gaseous refrigerant in the shell side; manholes are used for maintenance; and nitrogen inlets are used to purge and replace nitrogen before use.

[0025] Furthermore, the bottom of the second shell side is also provided with a liquid refrigerant outlet, which is connected to the liquid refrigerant inlet of the first shell side via a pipe.

[0026] The unvaporized liquid refrigerant in the second shell side is used as a refrigerant in the first shell side as a cooling medium, thus reusing the liquid refrigerant, improving its utilization rate and reducing consumption.

[0027] Furthermore, the first end cap assembly includes a first shell-side end cap and a first tube sheet. The first tube sheet and the first shell-side end cap are connected by a cylindrical seal. The heat exchange tube bundle passes through the first tube sheet, and its outer tube is expanded to the first tube sheet.

[0028] The first tube sheet serves to support and fix the heat exchange tubes, and the use of an expansion joint structure between the outer tube and the first tube sheet ensures safety.

[0029] Furthermore, the second end cap assembly includes a second shell-side end cap, a second tube sheet, and a third tube sheet. The second tube sheet and the second shell-side end cap are connected by a cylindrical seal. The third tube sheet is welded to the second tube sheet. A connecting cavity is provided between the third tube sheet and the second tube sheet. The inner tube of the heat exchange tube bundle passes through the second tube sheet and the third tube sheet. The outer tube of the heat exchange tube bundle on the left side of the connecting cavity passes through the second tube sheet and communicates with the connecting cavity. The outer tube of the heat exchange tube bundle on the right side of the connecting cavity passes through the third tube sheet and communicates with the connecting cavity. The outer tubes are welded to the second tube sheet and the third tube sheet respectively.

[0030] The third tube sheet and the second tube sheet serve to support and fix the heat exchange tubes. The outer tubes are welded to the second and third tube sheets, and the outer tubes on both sides are connected through a connecting cavity, which makes this application suitable for environments with larger pressure differentials.

[0031] Furthermore, the inner tube is made of S30408, the outer tube is made of 09MnNiD, the inner tube consists of rigid pipe sections at both ends and a flexible pipe section in the middle, the flexible pipe section is made of corrugated pipe; the left and right pipe boxes are both made of 09MnNiD, and the horizontal shell is made of 16MnDR or 09MnNiDR.

[0032] The inner tube uses a corrugated pipe made of S30408 ​​material, which has higher heat transfer efficiency. Furthermore, the corrugated pipe is flexible, compensating for the deformation caused by the different expansion and contraction rates of the inner and outer tubes, reducing damage to the tube sheet welds. The 09MnNiD material has good temperature resistance and impact toughness, while the outer tube, tube box, and shell are made of 09MnNiDR material, ensuring safe use.

[0033] The beneficial effects of this utility model are:

[0034] 1. This application combines the cold exchanger, primary ammonia cooler, and secondary ammonia cooler of the primary ammonia synthesis reaction and the cold exchanger, primary ammonia cooler, and secondary ammonia cooler of the secondary ammonia synthesis reaction into a single heat exchange shell, which greatly reduces the manufacturing cost and operational complexity of the equipment, saves control components such as pipes and valves, and saves installation space.

[0035] 2. This application uses a heat exchange jacket consisting of an outer tube and an inner tube as a heat exchange tube bundle, which enables the condenser of this application to have a double tube-pass, multi-shell-pass heat exchange structure. This structure greatly increases the flow rate of the heat exchange medium, improves the heat exchange efficiency, and makes the condenser structure compact and highly safe. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the combined cooling condenser of this utility model.

[0037] Figure 2 for Figure 1 The left-side view.

[0038] Figure 3 for Figure 1 Sectional view along the BB direction.

[0039] Figure 4 This is a schematic diagram of the second head assembly.

[0040] Figure 5 This is a schematic diagram of the connection structure between the inner tube, the inner tube sheet, and the support plate.

[0041] Figure 6 This is a schematic diagram of the baffle plate structure.

[0042] Figure 7 This is a schematic diagram of the left-side pipe box.

[0043] Figure 8 This is a schematic diagram of the right-side pipe box.

[0044] Figure 9 This is a schematic diagram illustrating the working principle of this utility model. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and preferred embodiments.

[0046] See Figures 1-3 This application provides a combined cooling condenser, including a left tube box 10, a right tube box 20, a heat exchange tube bundle 40 and a horizontal shell 30. The left tube box 10 and the right tube box 20 are axially connected to the left and right ends of the horizontal shell 30, respectively. The heat exchange tube bundle 40 is axially disposed inside the horizontal shell 30, with its two ends extending into the left tube box 10 and the right tube box 20, respectively.

[0047] In this embodiment, the left tube box 10 and the right tube box 20 are arranged collinearly, with the center line of the tube box located below the center line of the shell; the heat exchange tube bundle 40 is arranged in the lower middle part of the horizontal shell 30 and is arrayed within the cross-section of the tube box.

[0048] The heat exchange tube bundle 40 consists of several heat exchange sleeves extending axially along the shell. Each heat exchange sleeve includes an inner tube 41 and an outer tube 42. The outer tube 42 is fitted over the inner tube 41 and an annular flow channel is provided between the outer tube 42 and the inner tube wall. In this embodiment, the inner tube 41 is made of S30408 ​​stainless steel with an outer diameter of 19mm, and the outer tube 42 is made of 09MnNiD steel with a diameter of 35*3.5mm. The radial width of the annular flow channel is 4.5mm.

[0049] See Figure 7 The left-side tube box 10 includes a cylindrical box body closed at both ends by a box body end plate 11 and an outer tube plate 12. Inside the box body are a partition 13 and an inner tube plate 14. The partition 13 is L-shaped, with one end extending horizontally along the center line of the tube box to the outer tube plate 12, and the other end extending vertically upwards to the inner wall of the tube box, dividing the inner cavity of the tube box into an upper cavity and a lower cavity. The inner tube plate 14 intersects the horizontal portion of the partition 13, dividing the upper cavity into a first air inlet chamber 101 and a first air outlet chamber 103, and dividing the lower cavity into a second air inlet chamber 102 and a second air outlet chamber 104. The top of the first air inlet chamber 101 has an a2 air inlet port, the top of the first air outlet chamber 103 has a d2 air outlet port, the bottom of the second air inlet chamber 102 has an a1 air inlet port, and the bottom of the second air outlet chamber 104 has a d1 air outlet port.

[0050] The left end of the heat exchange tube bundle 40 extends through the outer tube sheet 12 into the interior of the left tube box 10. The outer tube 42 of the heat exchange tube bundle 40 passes through the outer tube sheet 12 and communicates with the first air inlet chamber 101 and the second air inlet chamber 102 respectively. The inner tube 41 of the heat exchange tube bundle 40 passes through the outer tube sheet 12 and the inner tube sheet 14 and communicates with the first air outlet chamber 103 and the second air outlet chamber 104 respectively. The left end of the outer tube 42 is welded to the outer tube sheet 12, and the left end of the inner tube 41 is welded to the inner tube sheet 14.

[0051] Two first baffles 15 are also provided between the inner tube sheet 14 and the outer tube sheet 12, and the two first baffles 15 are fixed to the inner tube sheet 14 by tie rods 16. The arrangement of the first baffles 15 can improve the heat exchange efficiency of the first air inlet chamber 101 and the second air inlet chamber 102. The first baffles 15 also serve to support the inner tube 41.

[0052] The top of the second air outlet chamber 104 is also provided with an e2 thermometer interface for installing a thermometer to measure the temperature of the second air outlet chamber 104.

[0053] The bottom of the left-side pipe box 10 is also equipped with a pipe box bracket to support the pipe box and improve its rigidity.

[0054] See Figure 8 The structure of the right-side tube box 20 is the same as that of the left-side tube box 10. The right-side tube box 20 includes a cylindrical box body that is closed at both ends by a box body end plate 21 and an outer tube plate 22. The box body is provided with a partition 23 and an inner tube plate 24. The partition 23 is L-shaped, with one end extending horizontally along the center line of the tube box to the outer tube plate 22, and the other end extending vertically upward to the inner wall of the tube box, dividing the inner cavity of the tube box into an upper cavity and a lower cavity. The inner tube plate 24 and the horizontal part of the partition 23 cross each other, dividing the upper cavity into a third air inlet chamber 203 and a third air outlet chamber 201, and dividing the lower cavity into a fourth air inlet chamber 204 and a fourth air outlet chamber 202. The top of the third air inlet chamber 203 is provided with a c2 air inlet, the top of the third air outlet chamber 201 is provided with a b2 air outlet, the bottom of the fourth air inlet chamber 204 is provided with a c1 air inlet, and the bottom of the fourth air outlet chamber 202 is provided with a b1 air outlet.

[0055] The right end of the heat exchange tube bundle 40 extends through the outer tube sheet 22 into the inside of the right-side tube box 20. The outer tube 42 of the heat exchange tube bundle 40 passes through the outer tube sheet 22 and communicates with the third air inlet chamber 203 and the fourth air inlet chamber 204 respectively. The inner tube 41 of the heat exchange tube bundle 40 passes through the outer tube sheet 22 and the inner tube sheet 24 and communicates with the third air outlet chamber 201 and the fourth air outlet chamber 202 respectively. The right end of the outer tube 42 is welded to the outer tube sheet 22, and the right end of the inner tube 41 is welded to the inner tube sheet 24.

[0056] Two first baffles 25 are also provided between the inner tube sheet 24 and the outer tube sheet 22, and the two first baffles 25 are fixed to the inner tube sheet 24 by tie rods 26. The arrangement of the first baffles 25 can improve the heat exchange efficiency of the third exhaust chamber 201 and the fourth exhaust chamber 202. The first baffles 25 also serve to support the inner tube 41.

[0057] The top of the fourth air intake chamber 204 is also equipped with an e4 thermometer interface for installing a thermometer to measure the temperature of the fourth air intake chamber 204.

[0058] The bottom of the right-side pipe box 20 is also equipped with a pipe box bracket to support the pipe box and improve its rigidity.

[0059] See Figure 5 The inner tube 41 consists of rigid tube sections 411 at both ends and a flexible tube section 412 in the middle, the flexible tube section 412 being a corrugated pipe; the rigid tube sections 411 are used for fixing and installing the inner tube, such as... Figure 5 As shown, the rigid tube section 411 at the left end of the inner tube 41 slides through the first baffle 15 of the left tube box and is welded to the outer tube sheet 12. The rigid tube section 411 at the right end of the inner tube 41 slides through the first baffle 25 of the right tube box and is welded to the outer tube sheet 22. The flexible tube section 412 is used to connect the rigid tube sections 411 at both ends. Since the corrugated pipe has a larger surface area, the heat exchange effect of the inner and outer tubes can be further improved.

[0060] See Figure 1 The horizontal shell 30 is divided into a first shell side 301, a second shell side 302, and a third shell side 303 by a first end cap assembly 31 and a second end cap assembly 32.

[0061] The first shell side 301 has h1, m1, k1, and j1 ports at the top, s1 and t1 ports at the bottom, and y5, y6, w5, and w6 ports and an x3 manhole on the side; the second shell side 302 has h2, m2, k2, and j2 ports at the top, r2, u1, s2, and t2 ports at the bottom, and y3, y4, w3, and w4 ports and an x2 manhole on the side; the third shell side 303 has h3, m3, k2, and j3 ports at the top, s3, u2, and t3 ports at the bottom, and y1, y2, w1, and w2 ports and an x1 manhole on the side.

[0062] H1, H2, and H3 are all safety valve ports; M1, M2, and M3 are all vent ports; K1, K2, and K3 are all gaseous refrigerant outlets; J1, J2, and J3 are all pressure gauge interfaces; S1, S2, and S3 are all liquid refrigerant inlets; T1, T2, and T3 are all drain ports; R2 is a liquid refrigerant outlet; U1 and U2 are both nitrogen inlets; Y1-6 are the first level gauge interfaces; and W1-6 are the second level gauge interfaces. Two level gauges are installed in each shell side to ensure the accuracy of level monitoring and improve operational safety.

[0063] In this embodiment, the r2 port of the second shell side 302 is connected to the s1 port of the first shell side 301 via a pipe.

[0064] The first end cap assembly 31 includes a first shell-side end cap and a first tube sheet. The first shell-side end cap is an arc-shaped plate protruding to the right and is welded to the horizontal shell 30. The first tube sheet is a circular flat plate and is sealed to the first shell-side end cap by a cylindrical tube. The first tube sheet is vertically arranged, and the heat exchange tube bundle 40 passes through the first tube sheet, with its outer tube 42 expanded to connect with the first tube sheet.

[0065] See Figure 4 The second end cap assembly 32 includes a second shell-side end cap 321, a second tube sheet 323, and a third tube sheet 324. The second shell-side end cap 321 is an arc-shaped plate protruding to the right and is welded to the horizontal shell 30. The second tube sheet 323 and the third tube sheet 324 are both circular flat plates. The second tube sheet 324 and the second shell-side end cap 321 are sealed together by a cylinder 322. The third tube sheet 324 is welded to the second tube sheet 323. 4. Right grooves are formed on both sides opposite to the second tube sheet 323. The two grooves fit together to form a connecting cavity 320. The inner tube 41 of the heat exchange tube bundle 40 passes through the third tube sheet 324 and connects to the second tube sheet 323. The outer tube of the heat exchange tube bundle on the left side of the connecting cavity passes through the second tube sheet 323 and connects to the connecting cavity. The outer tube of the heat exchange tube bundle on the right side of the connecting cavity passes through the third tube sheet 324 and connects to the connecting cavity. The outer tube 42 is welded to both the second tube sheet 323 and the third tube sheet 324. A drain pipe 325 is provided at the bottom of the connecting cavity 320. The lower end of the drain pipe 325 passes through the horizontal shell 30 to form a drain port. The drain pipe 325 is used to drain the liquid in the connecting cavity during maintenance.

[0066] See Figure 1 , Figure 3 and Figure 6 A second baffle, a third baffle, and a fourth baffle are respectively provided in the first shell side 301, the second shell side 302, and the third shell side 303. The second, third, and fourth baffles are supported on the bottom wall of the shell by brackets. Figure 3 As shown, the fourth baffle 33 is supported on the bottom wall of the housing by a bracket 331. Figure 6 As shown, the first, second, third, and fourth baffles have the same structure and are all support plates.

[0067] This application can be used for cooling and condensing primary and secondary gaseous ammonia in a bipolar ammonia synthesis process. For example, when used to replace the combined cooling condenser in patent number CN118145674A, its working principle is as follows:

[0068] See Figure 9The -35℃ gaseous ammonia separated by the primary ammonia separator enters the fourth inlet chamber 204 of the right tube box through port C1, flows through the inner tube 41 of the lower heat exchange tube bundle inside the shell, and then enters the second outlet chamber 104 of the left tube box. The gaseous ammonia with a temperature of 35℃ discharged from port d1 enters the shell side of the secondary heat exchanger.

[0069] The -35℃ gaseous ammonia separated by the secondary ammonia separator enters the third inlet chamber 203 of the right tube box through port C2, flows through the inner tube 41 of the upper heat exchange tube bundle inside the shell and enters the first outlet chamber 103 of the left tube box. The gaseous ammonia with a temperature of 35℃ discharged from port d2 enters the inlet of the circulating machine.

[0070] Ammonia gaseous at 40°C from the primary water cooler enters the second inlet chamber 102 of the left tube box through port a1, flows through the outer tube 42 of the lower heat exchange tube bundle inside the shell, and then enters the fourth outlet chamber 202 of the right tube box. Ammonia gaseous at -35°C discharged from port b1 enters the primary ammonia separator.

[0071] Ammonia gaseous at 40°C from the secondary water cooler enters the first inlet chamber 101 of the left tube box through port a2, flows through the outer tube 42 of the upper heat exchange tube bundle inside the shell, and then enters the third outlet chamber 201 of the right tube box. Ammonia gaseous at -35°C discharged from port b2 enters the secondary ammonia separator.

[0072] Inside the heat exchanger, the low-temperature ammonia gas in the inner tube 41 exchanges heat with the high-temperature ammonia gas in the outer tube 42, causing the temperature of the low-temperature ammonia gas in the inner tube 41 to rise and the temperature of the high-temperature ammonia gas in the outer tube 42 to fall.

[0073] In the first shell side 301, liquid refrigerant at a temperature of -20°C from the second shell side 302r2 port enters through port s1, exchanges heat with the heat exchange tube, and changes from liquid to gaseous phase through phase change heat transfer. The gaseous refrigerant at an outlet temperature of -20°C is discharged from port K1.

[0074] In the second shell side 302, liquid refrigerant at a temperature of -20°C from the boundary area (refrigeration unit) enters through port s2, exchanges heat with the heat exchange sleeve, and changes from liquid phase to gas phase through phase change heat transfer. The gaseous refrigerant at an outlet temperature of -20°C is discharged from port K2.

[0075] In the third shell side 303, liquid refrigerant at a temperature of -41°C from the boundary area (refrigeration unit) enters through port s3, exchanges heat with the heat exchange tube, and changes from liquid to gas phase through phase change heat transfer. The gaseous refrigerant at an outlet temperature of -41°C is discharged from port K3.

[0076] The combined cooling condenser of this application can also be used in other processes that require simultaneous cooling of two gases and simultaneous recovery of some heat energy.

[0077] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A combined cooling condenser, characterized in that, It includes a left tube box (10), a right tube box (20), a heat exchange tube bundle (40) and a horizontal shell (30), with the left tube box (10) and the right tube box (20) axially connected to the left and right ends of the horizontal shell (30) respectively; Both the left-side tube box (10) and the right-side tube box (20) include a cylindrical box that is closed at both ends by a box end plate and an outer tube plate, and a partition and an inner tube plate are provided inside the box. The left side tube box (10) is divided into a first air inlet chamber (101), a second air inlet chamber (102), a first air outlet chamber (103), and a second air outlet chamber (104) by a partition and an inner tube plate; The right-side tube box (20) is divided into a third air outlet chamber (201), a fourth air outlet chamber (202), a third air inlet chamber (203), and a fourth air inlet chamber (204) by a partition and an inner tube plate; Each air inlet chamber is equipped with an air inlet pipe, and each air outlet chamber is equipped with an air outlet pipe. The heat exchange tube bundle (40) consists of several heat exchange sleeves extending along the shell axial direction. The heat exchange sleeves include an inner tube (41) and an outer tube (42). The outer tube (42) is fitted outside the inner tube (41) and an annular flow channel is provided between the outer tube (42) and the inner tube wall. The two ends of the inner tube (41) extend to the left and right side tube boxes respectively and are fixed to the inner tube plate. The two ends of the outer tube (42) extend to the left and right side tube boxes respectively and are fixed to the outer tube plate. The first air inlet chamber (101) and the second air inlet chamber (102) are connected to the third air outlet chamber (201) and the fourth air outlet chamber (202) respectively through the outer pipe (42); The third air intake chamber (203) and the fourth air intake chamber (204) are connected to the first air outlet chamber (103) and the second air outlet chamber (104) respectively through the inner tube (41); The shell is divided into a first shell side, a second shell side, and a third shell side by a first head assembly and a second head assembly; the first shell side, the second shell side, and the third shell side are respectively provided with a refrigerant inlet and a refrigerant outlet.

2. The combined cooling condenser of claim 1, wherein, The heat exchange tube bundle (40) is located in the lower middle part of the horizontal shell (30); the left tube box (10) and the right tube box (20) are arranged in a collinear manner, and the center line of the tube box is located below the center line of the shell.

3. The combined cooling condenser of claim 1, wherein, The baffle is L-shaped, with one end extending horizontally along the center line of the tube box to the outer tube sheet, and the other end extending vertically upward to the inner wall of the tube box, dividing the inner cavity of the tube box into an upper cavity and a lower cavity; the horizontal part of the inner tube sheet and the baffle cross each other, dividing the upper cavity and the lower cavity into two air inlet chambers and two air outlet chambers.

4. The combined cooling condenser of claim 1, wherein, Both the left tube box (10) and the right tube box (20) are equipped with a first baffle plate, which is fixed to the inner tube plate by a tie rod; the first baffle plate is a single bow-shaped baffle plate.

5. The combined cooling condenser of claim 1, wherein, The first shell side, the second shell side, and the third shell side are respectively provided with a second baffle plate, a third baffle plate, and a fourth baffle plate. The second baffle plate, the third baffle plate, and the fourth baffle plate are respectively supported on the bottom wall of the shell by brackets. The second baffle plate, the third baffle plate, and the fourth baffle plate are all support plates.

6. The combined cooling condenser of claim 1, wherein, The first, second, and third shells are equipped with a safety valve interface, vent, gaseous refrigerant outlet, and pressure gauge interface at the top, and a drain outlet and liquid refrigerant inlet at the bottom. The sides are equipped with manholes and level gauge interfaces. The bottom of the second and third shells is equipped with a nitrogen inlet.

7. The combined cooling condenser of claim 6, wherein, The bottom of the second shell side is also provided with a liquid refrigerant outlet, which is connected to the liquid refrigerant inlet of the first shell side through a pipe.

8. The combined cooling condenser of claim 1, wherein, The first end cap assembly includes a first shell-side end cap and a first tube sheet. The first tube sheet and the first shell-side end cap are connected by a cylindrical seal. The heat exchange tube bundle (40) passes through the first tube sheet, and its outer tube is expanded to the first tube sheet.

9. The combined cooling condenser of claim 1, wherein, The second end cap assembly includes a second shell-side end cap, a second tube sheet, and a third tube sheet. The second tube sheet and the second shell-side end cap are connected by a cylindrical seal. The third tube sheet is welded to the second tube sheet. A connecting cavity is provided between the third tube sheet and the second tube sheet. The inner tube (41) of the heat exchange tube bundle (40) passes through the second tube sheet and the third tube sheet. The outer tube (42) of the heat exchange tube bundle (40) on the left side of the connecting cavity passes through the second tube sheet and communicates with the connecting cavity. The outer tube (42) of the heat exchange tube bundle (40) on the right side of the connecting cavity passes through the third tube sheet and communicates with the connecting cavity. The outer tube (42) is welded to the second tube sheet and the third tube sheet respectively.

10. The combined cooling condenser of claim 1, wherein, The inner tube (41) is made of S30408, the outer tube (42) is made of 09MnNiD, the inner tube (41) is composed of rigid pipe sections (411) at both ends and flexible pipe section (412) in the middle, and the flexible pipe section (412) is made of corrugated pipe; the left pipe box (10) and the right pipe box (20) are both made of 09MnNiD, and the horizontal shell (30) is made of 16MnDR or 09MnNiDR.

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