Energy-saving heat exchanger for processing of pharmaceutical intermediates

Abstract

The application discloses an energy-saving heat exchanger for processing of medical intermediates, and relates to the field of medical processing.The energy-saving heat exchanger comprises a heat exchanger main body, a turbulence structure is arranged in the heat exchange cavity, the turbulence structure comprises a driving motor fixedly installed at the end of the heat exchanger main body, the output end of the driving motor is provided with a reciprocating screw rod connected with the bearing of the heat exchanger main body, two groups of moving plates are screw-installed on the outer wall of the reciprocating screw rod in an equidistant manner, first through holes and second through holes are respectively arranged on the outer walls of the two sides of the moving plates, a cleaning structure for cleaning the outer wall of the heat exchange pipe is arranged on one side of the moving plate, and a air-drying structure is arranged on the other side of the moving plate.The energy-saving heat exchanger for processing of medical intermediates can timely remove the scale on the outer wall of the heat exchange pipe while improving the heat exchange efficiency, delays the decay rate of the heat exchange efficiency, reduces the energy consumption caused by the scale, and does not need to disassemble the equipment, thereby reducing the maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical processing technology, specifically to an energy-saving heat exchanger for processing pharmaceutical intermediates. Background Technology

[0002] Pharmaceutical intermediates are key semi-finished products that connect chemical raw materials and final drugs. They are not drugs themselves and cannot be used directly to treat diseases. Their core role is to serve as "building blocks" in the drug synthesis process, providing the necessary chemical structure for the subsequent synthesis of active drug components. In the processing of pharmaceutical intermediates, heat exchangers are key equipment for heating, cooling or maintaining a constant temperature of materials. Their performance directly affects the reaction efficiency, product quality and production energy consumption of pharmaceutical intermediates.

[0003] In the prior art, Chinese Patent No. CN221484267U discloses a novel tubular heat exchanger, including a base shell. A medium outlet pipe is fixedly connected to the top of the base shell, and a medium outlet pipe is fixedly connected to the bottom of the base shell. Mounting plates are provided at both ends of the base shell, and fastening bolts are provided on the mounting plates. A sealing cylinder is provided on the left side of the mounting plate, and a medium inlet pipe is fixedly connected to the top of the sealing cylinder. A medium outlet pipe is fixedly connected to the bottom of the sealing cylinder. A third cavity is provided inside the sealing cylinder on the right side. An inner shell is provided inside the base shell, and fixing members are provided at both ends of the inner shell. An upper half tube bundle is provided on the fixing members, and a lower half tube bundle is provided on the fixing members. Baffles are provided on the upper half tube bundle and the lower half tube bundle. The fastening bolts facilitate workers to clean the interior and prevent scale from affecting the interior.

[0004] For example, in the prior art, Chinese patent CN214582650U discloses a novel tubular heat exchanger, including a novel tubular heat exchanger body, a base, and connecting columns. The novel tubular heat exchanger body has symmetrically arranged bases on both sides, and connecting columns are fixedly installed on the upper surface of each base. Through the design of a motor, rotating shaft, thread, fixing block, nozzle, and cavity, the motor drives the rotating shaft to rotate, which in turn drives the thread to rotate. At this time, the thread drives the fixing block to move, and then the thread fills the cavity with water. The water then sprays out from the inside of the nozzle, and then the thread drives the sponge brush to clean the surface of the novel tubular heat exchanger body. Through the optimization of the novel tubular heat exchanger body, the cleaning effect is achieved, preventing situations where some parts of the device are difficult to clean, and where dirt and dust on the surface may corrode the device surface and reduce the service life of the device if it is not cleaned for a long time.

[0005] Based on the above information, existing heat exchangers, when processing pharmaceutical intermediates, often suffer from scaling on the outer wall of the heat exchange tubes due to the presence of viscous and easily fouling components in these intermediates. This not only requires periodic disassembly and cleaning, a time-consuming and labor-intensive process that severely impacts processing efficiency, but also causes a rapid decrease in the heat transfer coefficient due to material adhesion and scaling, leading to accelerated heat exchange efficiency decay and increased equipment energy consumption. Therefore, we propose an energy-saving heat exchanger for pharmaceutical intermediate processing. Summary of the Invention

[0006] The purpose of this invention is to provide an energy-saving heat exchanger for processing pharmaceutical intermediates, in order to solve the problem mentioned in the background art where, when processing pharmaceutical intermediates, the pharmaceutical intermediates often contain viscous and easily scale-forming components, which easily form scale on the outer wall of the heat exchange tubes. This not only requires periodic disassembly and cleaning, which is time-consuming and labor-intensive and seriously affects processing efficiency, but also causes the heat transfer coefficient to decrease rapidly due to material adhesion and scaling, leading to accelerated decay of heat exchange efficiency and thus increasing equipment energy consumption.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving heat exchanger for pharmaceutical intermediate processing, comprising a heat exchanger body, the heat exchanger body being composed of a heat exchange cavity and heat exchange tubes arranged in an array inside the heat exchange cavity, the heat exchange cavity being provided with a turbulence structure, the turbulence structure including a drive motor fixedly installed at the end of the heat exchanger body, and the output end of the drive motor being provided with a reciprocating lead screw connected to the bearing of the heat exchanger body, and two sets of equally spaced moving plates being threaded on the outer wall of the reciprocating lead screw, the outer walls of the moving plates being respectively provided with a first through hole and a second through hole, and the first through hole and the second through hole being respectively provided with a one-to-one correspondence with the heat exchange tubes, one side of the moving plate being provided with a cleaning structure for cleaning the outer wall of the heat exchange tubes, and the other side of the moving plate being provided with a drying structure for drying the cleaned outer wall of the heat exchange tubes.

[0008] Preferably, the movable plate is slidably connected to the inner wall of the heat exchange cavity, and the outer wall of the movable plate is in contact with the inner wall of the heat exchange cavity. The diameter of the first through hole is larger than the diameter of the heat exchange tube, and the first through hole is connected to the second through hole. The diameter of the second through hole is larger than the diameter of the first through hole. The reciprocating screw is fitted with a telescopic sleeve on its outer wall.

[0009] Preferably, the cleaning structure includes a cleaning pipe fixedly installed on the outer wall of the movable plate, and a cleaning nozzle is provided on the outer wall of the cleaning pipe. A drain valve is provided at the bottom of the heat exchange chamber. A first cavity is provided inside the side of the movable plate with the first through hole. A first air inlet pipe is provided on the outer wall of the movable plate, and an air pump is connected to the first air inlet pipe. The first air inlet pipe is connected to the first cavity. A cleaning airbag is provided on the inner wall of the first through hole.

[0010] Preferably, the cleaning pipe is located on the outer wall of the movable plate on the side with the first through hole, and a water inlet pipe is fixedly connected to the outer wall of the cleaning pipe, and a water pump is connected to the outside of the water inlet pipe. The cleaning nozzles are provided on both the side of the cleaning pipe near the inner wall of the heat exchange chamber and the side near the heat exchange pipe, and the cleaning nozzles are set at equal angles.

[0011] Preferably, the cleaning airbag is connected to the first cavity, and the outer wall of the cleaning airbag is in contact with the outer wall of the heat exchange tube in the cleaning state, for wiping and cleaning the dirt on the outer wall of the heat exchange tube.

[0012] Preferably, the air-drying structure includes a groove formed on the side wall of the movable plate. The groove is located on the outer wall of the movable plate on the side with the second through hole, and the groove is connected to the heat exchange cavity. The inner wall of the second through hole has air-drying holes distributed at equal intervals. One end of the air-drying holes is connected to the second through hole, and the other end of the air-drying holes is connected to the groove.

[0013] Preferably, the cleaning structure further includes a cleaning pipe rotatably mounted on the outer wall of the movable plate. The outer wall of the movable plate is provided with a rotating groove, and the inner wall of the rotating groove is rotatably connected to the end of the cleaning pipe. The interior of the rotating groove is connected to the water inlet pipe, and the end of the cleaning pipe is provided with a drive baffle.

[0014] Preferably, the drive baffle is located inside the rotating groove, and the drive baffle is designed to be inclined as a whole. The drive baffle is distributed at equal angles. The end of the cleaning tube is provided with connecting holes distributed at equal angles, and the two ends of the connecting holes are respectively connected to the inside of the cleaning tube and the rotating groove.

[0015] Preferably, the air-drying structure further includes a second cavity disposed inside the movable plate, the outer wall of the movable plate is provided with a second air inlet pipe, and the second air inlet pipe is connected to the interior of the second cavity, and the end of the air-drying vent away from the heat exchange tube is connected to the second cavity.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This energy-saving heat exchanger for pharmaceutical intermediate processing, by setting up a turbulence structure and using a drive motor to drive a reciprocating screw to rotate, causes the moving plate to reciprocate within the heat exchange chamber. This creates turbulence in the fluid inside the heat exchange chamber, improving the heat exchange efficiency between the fluid and the heat exchange tubes and reducing energy consumption. At the same time, the reciprocating motion of the moving plate provides the power basis for the cleaning and drying structures, realizing a multi-functional integrated design.

[0017] 2. Through the design of the cleaning structure, during the movement of the moving plate, the cleaning airbag can expand under the action of the air pump and fit against the outer wall of the heat exchange tube to wipe and clean the dirt on the outer wall of the heat exchange tube. At the same time, the cleaning nozzle on the cleaning tube can rinse the heat exchange tube and the inner wall of the heat exchange chamber from multiple angles. Cleaning can be completed without disassembling the equipment, avoiding the time-consuming and labor-intensive problems caused by regular disassembly and cleaning, and ensuring processing efficiency.

[0018] 3. By setting up a drying structure, the outer wall of the heat exchange tube can be quickly dried by the gas flow in the heat exchange chamber after cleaning and during the resetting of the moving plate. Gas is sprayed out through the drying vents to accelerate the evaporation of moisture on the surface of the heat exchange tube, preventing residual moisture after cleaning from contacting pharmaceutical intermediates and affecting product quality. At the same time, it avoids the formation of new dirt deposits on the surface of the heat exchange tube, which helps to maintain the heat exchange efficiency of the heat exchange tube.

[0019] 4. The rotatable cleaning tube in the cleaning structure can rotate under the action of the drive baffle and the impact force of the water flow, so that the rinsing range of the cleaning nozzle is wider and more uniform, improving the cleaning effect, further reducing the scale residue on the outer wall of the heat exchange tube, ensuring the heat transfer performance of the heat exchange tube, and reducing the energy consumption of the equipment.

[0020] 5. The overall structure is ingeniously designed, organically combining turbulence, cleaning, and drying functions. While improving heat exchange efficiency, it can promptly remove scale from the outer wall of the heat exchange tubes, slow down the rate of heat exchange efficiency decay, reduce the problem of increased energy consumption caused by scale, meet energy-saving requirements, and eliminate the need for frequent disassembly of the equipment, thereby reducing maintenance costs and improving the practicality and economy of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the heat exchanger body of the present invention; Figure 3 This is a schematic diagram of the turbulence structure of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the movable plate of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the cleaning tube, cleaning nozzle, first through hole, and cleaning airbag structure of the present invention; Figure 7 This is a schematic diagram of the rotating groove and driving baffle structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 9This is a schematic diagram of the cleaning tube, drive baffle, and connecting hole structure of the present invention; Figure 10 This is a schematic diagram of the movable plate, the second through hole, and the air drying hole structure of the present invention; Figure 11 This is a schematic diagram of the cross-sectional structure of the second cavity of the present invention.

[0022] In the diagram: 1. Heat exchanger body; 2. Heat exchange chamber; 3. Heat exchange tube; 4. Drain valve; 5. Drive motor; 6. Reciprocating screw; 7. Telescopic sleeve; 8. Moving plate; 9. First cavity; 10. First through hole; 11. Cleaning airbag; 12. First air inlet pipe; 13. Cleaning pipe; 14. Cleaning nozzle; 15. Water inlet pipe; 16. Groove; 17. Drying air hole; 18. Second through hole; 19. Rotating groove; 20. Connecting hole; 21. Drive baffle; 22. Second cavity; 23. Second air inlet pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figures 1-6 The present invention provides the following technical solution: an energy-saving heat exchanger for pharmaceutical intermediate processing, comprising a heat exchanger body 1, the heat exchanger body 1 being composed of a heat exchange cavity 2 and heat exchange tubes 3 arranged in an array inside the heat exchange cavity 2, the heat exchange cavity 2 being provided with a turbulence structure, the turbulence structure including a drive motor 5 fixedly installed at the end of the heat exchanger body 1, and the output end of the drive motor 5 being provided with a reciprocating lead screw 6 connected to the bearing of the heat exchanger body 1, and the outer wall of the reciprocating lead screw 6 being threaded with two sets of equally spaced moving plates. 8. The outer walls on both sides of the movable plate 8 are respectively provided with a first through hole 10 and a second through hole 18, and the first through hole 10 and the second through hole 18 are respectively provided with a one-to-one correspondence with the heat exchange tube 3; the movable plate 8 is slidably connected to the inner wall of the heat exchange cavity 2, and the outer wall of the movable plate 8 is in contact with the inner wall of the heat exchange cavity 2. The diameter of the first through hole 10 is larger than the diameter of the heat exchange tube 3, and the first through hole 10 is connected to the second through hole 18, and the diameter of the second through hole 18 is larger than the diameter of the first through hole 10. The outer wall of the reciprocating screw 6 is fitted with a telescopic sleeve 7.

[0025] The turbulence-inducing structure drives the reciprocating screw 6 to rotate via the drive motor 5, causing the two sets of threaded moving plates 8 to reciprocate linearly along the inner wall of the heat exchange chamber 2. The moving plates 8 are tightly fitted and slidably connected to the inner wall of the heat exchange chamber 2. The first through hole 10 and the second through hole 18 on both sides correspond one-to-one with the heat exchange tubes 3, ensuring that the moving plates 8 do not interfere with the heat exchange tubes 3 during movement, allowing the pharmaceutical intermediates to flow through the first through hole 10 and the second through hole 18. The telescopic sleeve 7 sleeved on the outside of the reciprocating screw 6 can prevent the pharmaceutical intermediates from directly contacting the reciprocating screw 6, which could lead to corrosion or cross-contamination and affect operation. When the moving plates 8 reciprocate, on the one hand, they break the flow boundary layer in the heat exchange chamber 2 through their own movement, enhancing the turbulence of the medium and improving the heat exchange efficiency; on the other hand, they drive the cleaning structure and the drying structure to move synchronously, achieving comprehensive cleaning and drying of all heat exchange tubes 3. The equidistant distribution design of the two sets of moving plates 8 can make the turbulence effect more uniform and improve the coverage efficiency of the cleaning operation.

[0026] Example 2: Please refer to Figures 2-6 Based on Embodiment 1, a cleaning structure is also disclosed, the specific structure of which is as follows: A cleaning structure for cleaning the outer wall of the heat exchange tube 3 is provided on one side of the movable plate 8. The cleaning structure includes a cleaning pipe 13 fixedly installed on the outer wall of the movable plate 8, and a cleaning nozzle 14 is provided on the outer wall of the cleaning pipe 13. A drain valve 4 is provided at the bottom of the heat exchange chamber 2. A first cavity 9 is provided inside the side of the movable plate 8 with a first through hole 10. A first air inlet pipe 12 made of flexible tubing is provided on the outer wall of the movable plate 8. An air pump is connected to the first air inlet pipe 12, and the first air inlet pipe 12 is connected to the first cavity 9. A cleaning airbag 11 is provided on the inner wall of the first through hole 10. The cleaning pipe 13 is located on the outer wall of the movable plate with the first through hole 10, and a water inlet pipe 15 is fixedly connected to the outer wall of the cleaning pipe 13. A water pump is connected to the water inlet pipe 15. The cleaning nozzle 14 is provided on both the side of the cleaning pipe 13 near the inner wall of the heat exchange chamber 2 and the side near the heat exchange tube 3, and the cleaning nozzle 14 is set at equal angles.

[0027] like Figures 3-5 As shown, the cleaning airbag 11 is connected to the first cavity 9, and the outer wall of the cleaning airbag 11 is in contact with the outer wall of the heat exchange tube 3 in the cleaning state, which is used to wipe and clean the dirt on the outer wall of the heat exchange tube 3.

[0028] The cleaning pipe 13 is fixed to the side of the movable plate 8 with the first through hole 10. High-pressure cleaning fluid is supplied through the inlet pipe 15 of an external water pump. The inlet pipe 15 is a flexible hose. The cleaning nozzles 14 are distributed on both sides near the inner wall of the heat exchange chamber 2 and the heat exchange tube 3, and are set at equal angles. They can perform high-pressure flushing on the inner wall of the heat exchange chamber 2 and the outer wall of the heat exchange tube 3 while the movable plate 8 is moving. The first cavity 9 inside the movable plate 8 is connected to an external air pump through the first air inlet pipe 12. The cleaning airbag 11 on the inner wall of the first through hole 10 is connected to the first cavity 9. When cleaning is required, the air pump inflates the first cavity 9 through the first air inlet pipe 12, causing the cleaning airbag 11 to expand and fit tightly against the outer wall of the heat exchange tube 3. As the moving plate 8 reciprocates, the cleaning airbag 11 wipes the outer wall of the heat exchange tube 3. Combined with the flushing action of the high-pressure cleaning fluid, it can effectively remove sticky scale and attached materials. The waste liquid generated during cleaning moves towards the drain valve 4 through the moving plate 8, so that the waste liquid is discharged from the drain valve 4 at the end and middle section of the heat exchange chamber 2, thereby achieving the cleaning of the outer wall of the heat exchange tube 3 and the inner wall of the heat exchange chamber 2.

[0029] Example 3: Please refer to Figure 2 , Figure 4 and Figure 5 Based on Embodiment 1, a drying structure is also disclosed, the specific structure of which is as follows: The other side of the movable plate 8 is provided with a drying structure for drying the outer wall of the cleaned heat exchange tube 3. The drying structure includes a groove 16 opened on the side wall of the movable plate 8. The groove 16 is located on the outer wall of the movable plate 8 on the side where the second through hole 18 is provided, and the groove 16 is connected to the heat exchange cavity 2. The inner wall of the second through hole 18 is provided with drying air holes 17 distributed at equal intervals. One end of the drying air hole 17 is connected to the second through hole 18, and the other end of the drying air hole 17 is connected to the groove 16.

[0030] After the cleaning structure completes the cleaning operation, the air pump stops inflating the first cavity 9, the cleaning airbag 11 contracts, and the moving plate 8 continues to move and reset, squeezing the air inside the heat exchange chamber 2. Part of the airflow in the heat exchange chamber 2 flows directly from the second through hole to the first through hole, and another part of the airflow first enters the groove, then enters the drying air hole 17 through the groove 16, and then is blown towards the outer wall of the heat exchange tube 3 through the drying air hole 17. Then the airflow flows from the second through hole 18 to the first through hole 10, and finally is discharged from the drain valve 4, forming a cycle. As the moving plate 8 moves, the airflow can sweep the entire outer wall of the heat exchange tube 3, accelerate the evaporation of residual cleaning liquid, and avoid the formation of new scale due to residual moisture after cleaning. At the same time, under normal heat exchange conditions, the circulation of pharmaceutical intermediates in the groove 16 and the drying air hole 17 can also enhance the disturbance of pharmaceutical intermediates in the heat exchange chamber 2, and help improve the heat exchange efficiency.

[0031] Example 4: Please refer to Figure 7-9Based on Embodiment 1, the following structure is also disclosed: The cleaning structure further includes a cleaning pipe 13 rotatably mounted on the outer wall of the movable plate 8. The outer wall of the movable plate 8 is provided with a rotating groove 19, and the inner wall of the rotating groove 19 is rotatably connected to the end of the cleaning pipe 13. The interior of the rotating groove 19 is connected to the water inlet pipe 15. The end of the cleaning pipe 13 is provided with a driving baffle 21. The driving baffle 21 is located inside the rotating groove 19, and the driving baffle 21 is designed with an overall inclination and is distributed at equal angles. The end of the cleaning pipe 13 is provided with a connecting hole 20 distributed at equal angles, and the two ends of the connecting hole 20 are respectively connected to the interior of the cleaning pipe 13 and the rotating groove 19.

[0032] The cleaning pipe 13 is rotatably connected to the outer wall of the moving plate 8 via the rotating groove 19. The interior of the rotating groove 19 is connected to the water inlet pipe 15. The drive baffles 21 at the end of the cleaning pipe 13 are designed with an inclined angle and are distributed at equal angles. When the high-pressure cleaning fluid enters the rotating groove 19 through the water inlet pipe 15, the water flow impacts the drive baffles 21 to generate torque, causing the cleaning pipe 13 to rotate around its own axis. The equal-angle connecting holes 20 at the end of the cleaning pipe 13 allow the cleaning fluid to enter the interior of the cleaning pipe 13 from the rotating groove 19 and be sprayed out through the nozzles on the cleaning pipe 13. The rotating cleaning pipe 13 can make the cleaning fluid form a spiral jet flow, which enhances the flushing force on the outer wall of the heat exchange tube 3 and the inner wall of the heat exchange cavity 2. At the same time, the rotational movement of the cleaning pipe 13, combined with the movement of the moving plate 8, forms a three-dimensional cleaning trajectory, effectively removing stubborn scale. No additional power is needed to drive the rotation of the cleaning pipe 13; the rotation is achieved by the pressure of the cleaning fluid itself, which further improves the energy efficiency of the equipment.

[0033] Example 5: Please refer to Figures 10-11 Based on Embodiment 1, the following structure is also disclosed: the air-drying structure further includes a second cavity 22 disposed inside the movable plate 8, the outer wall of the movable plate 8 is provided with a second air inlet pipe 23 made of flexible tubing, and the second air inlet pipe 23 is connected to the interior of the second cavity 22, and the end of the air-drying vent 17 away from the heat exchange tube 3 is connected to the second cavity 22.

[0034] When the moving plate 8 moves and the cleaning structure is activated, external high-pressure gas enters the second cavity 22 through the second air inlet pipe 23 and is blown directionally toward the outer wall of the heat exchange tube 3 through the drying air holes 17. Compared with the drying structure that relies on natural airflow, the air source pressure and flow rate can be precisely controlled, and the drying intensity can be adjusted according to the cleaning situation. The high-pressure gas forms a uniform airflow through the equally spaced drying air holes 17. With the reciprocating motion of the moving plate 8, the residual moisture on the outer wall of the heat exchange tube 3 can be dried quickly, which significantly reduces the risk of secondary scaling. Moreover, the drying operation can be carried out at the same time as cleaning the outer wall of the heat exchange tube 3, thereby improving the cleaning efficiency.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving heat exchanger for processing pharmaceutical intermediates, comprising a heat exchanger body (1), wherein the heat exchanger body (1) is composed of a heat exchange cavity (2) and heat exchange tubes (3) arranged in an array inside the heat exchange cavity (2), characterized in that: The heat exchange cavity (2) is provided with a turbulence structure. The turbulence structure includes a drive motor (5) fixedly installed at the end of the heat exchanger body (1). The output end of the drive motor (5) is provided with a reciprocating screw (6) connected to the bearing of the heat exchanger body (1). The outer wall of the reciprocating screw (6) is threaded with two sets of moving plates (8) distributed at equal intervals. The outer walls of the two sides of the moving plate (8) are respectively provided with a first through hole (10) and a second through hole (18). The first through hole (10) and the second through hole (18) are respectively provided with a heat exchange tube (3). One side of the moving plate (8) is provided with a cleaning structure for cleaning the outer wall of the heat exchange tube (3). The other side of the moving plate (8) is provided with a drying structure for drying the outer wall of the cleaned heat exchange tube (3). The cleaning structure includes a cleaning pipe (13) fixedly installed on the outer wall of the movable plate (8), and a cleaning nozzle (14) is provided on the outer wall of the cleaning pipe (13). A drain valve (4) is provided at the bottom of the heat exchange chamber (2). A first cavity (9) is provided inside one side of the movable plate (8) with a first through hole (10). A first air inlet pipe (12) is provided on the outer wall of the movable plate (8), and an air pump is connected to the first air inlet pipe (12). The first air inlet pipe (12) is connected to the first cavity (9). A cleaning airbag (11) is provided on the inner wall of the first through hole (10). The air-drying structure includes a groove (16) opened on the side wall of the movable plate (8). The groove (16) is located on the outer wall of the movable plate (8) on the side where the second through hole (18) is provided, and the groove (16) is connected to the heat exchange cavity (2). The inner wall of the second through hole (18) is provided with air-drying air holes (17) distributed at equal intervals. One end of the air-drying air hole (17) is connected to the second through hole (18), and the other end of the air-drying air hole (17) is connected to the groove (16).

2. The energy-saving heat exchanger for pharmaceutical intermediate processing according to claim 1, characterized in that: The movable plate (8) is slidably connected to the inner wall of the heat exchange cavity (2), and the outer wall of the movable plate (8) is in contact with the inner wall of the heat exchange cavity (2). The diameter of the first through hole (10) is larger than the diameter of the heat exchange tube (3), and the first through hole (10) is connected to the second through hole (18), and the diameter of the second through hole (18) is larger than the diameter of the first through hole (10). The outer wall of the reciprocating screw (6) is fitted with a telescopic sleeve (7).

3. The energy-saving heat exchanger for pharmaceutical intermediate processing according to claim 1, characterized in that: The cleaning pipe (13) is located on the outer wall of the moving plate (8) on the side with the first through hole (10), and the outer wall of the cleaning pipe (13) is fixedly connected to the water inlet pipe (15), and the water inlet pipe (15) is connected to a water pump. The cleaning nozzle (14) is provided on both the side of the cleaning pipe (13) near the inner wall of the heat exchange chamber (2) and the side near the heat exchange pipe (3), and the cleaning nozzle (14) is set at equal angles.

4. The energy-saving heat exchanger for pharmaceutical intermediate processing according to claim 1, characterized in that: The cleaning airbag (11) is connected to the first cavity (9), and the outer wall of the cleaning airbag (11) is in contact with the outer wall of the heat exchange tube (3) in the clean state, for wiping and cleaning the dirt on the outer wall of the heat exchange tube (3).

5. The energy-saving heat exchanger for pharmaceutical intermediate processing according to claim 1, characterized in that: The air-drying structure also includes a second cavity (22) disposed inside the movable plate (8). The outer wall of the movable plate (8) is provided with a second air inlet pipe (23), and the second air inlet pipe (23) is connected to the second cavity (22). The end of the air-drying vent (17) away from the heat exchange tube (3) is connected to the second cavity (22).

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