Heat exchange device for spray freeze dryer

Abstract

The invention relates to the technical field of heat exchange, in particular to a heat exchange device for a spray freeze dryer, which comprises a heat exchange bin and a heat exchange tube, a cooling water inlet tube is mounted on one side of the bottom end of the heat exchange bin, an adjusting mechanism comprising a first motor and a conical rotating block is arranged at the top of the cooling water inlet tube, and tube plates are fixedly mounted at two ends of the heat exchange bin. A plurality of uniformly distributed heat exchange tubes are fixedly mounted between the two tube plates, and a plurality of uniformly distributed micro-channel mechanisms comprising brackets and micro-channel grooves are arranged among every four heat exchange tubes. The adjusting mechanism can control the flow speed of cooling water so as to improve the heat exchange efficiency and synchronously add chemicals to clean sediments, and the micro-channel mechanism can expand the heat exchange area of the heat exchange pipe.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange, and in particular to a heat exchange device for a spray freeze dryer. Background Art

[0002] The spray freeze dryer transports liquid materials to the spray gun through a peristaltic pump to be atomized into small droplets in the micron size. The small droplets encounter the cooled cold air and instantly freeze into small ice crystals. The small ice crystals are sublimated under high vacuum and dried into solid powder. After the heat is transferred, a heat exchange device is needed to exchange the working fluid temperature.

[0003] A heat exchange device is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. It can improve energy utilization and is suitable for different working fluids and different working conditions. These heat exchangers promote heat exchange between fluids by pumping. When the heat exchange efficiency needs to be improved, the pumping power can generally only be increased. However, as the pumping power increases, the fluid flow rate increases and the fluid residence time decreases, and the fluid heat exchange area cannot be increased by simply increasing the pumping power. Therefore, there are certain limitations and deficiencies in improving the heat exchange efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a heat exchange device for a spray freeze dryer.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A heat exchange device for a spray freeze dryer, comprising a heat exchange bin and a heat exchange tube, wherein a cooling water inlet tube is installed on one side of the bottom end of the heat exchange bin, an adjusting mechanism including a first motor and a conical rotating block is arranged on the top of the cooling water inlet tube, tube sheets are fixedly installed at both ends of the heat exchange bin, a plurality of evenly distributed heat exchange tubes are fixedly installed between the two tube sheets, a plurality of evenly distributed microchannel mechanisms including brackets and microchannel grooves are arranged between every four heat exchange tubes, a connecting bin is connected to one side of the heat exchange bin, a horizontally arranged partition plate connected to the center of the tube sheet is fixedly installed on the side of the connecting bin close to the tube sheet, a vertically arranged circular baffle is fixedly connected to one side of the partition plate, the diameter of the circular baffle plate is the same as the inner diameter of the connecting bin, a fixed bin is arranged inside the connecting bin, and a reversing mechanism is arranged inside the fixed bin;

[0007] The bracket is a hollow structure, with hollow grooves at the top and bottom of the bracket, and a plurality of sunken through holes at both sides of the bracket. The bracket is respectively abutted against four heat exchange tubes, and a microchannel groove is formed between the outer wall of the heat exchange tube and the sunken structure of the bracket. Four arc-shaped baffles are slidably connected around the bracket.

[0008] A first motor is fixedly installed on the top side wall of the cooling water inlet pipe, and the output shaft of the first motor penetrates into the cooling water inlet pipe. The end of the output shaft of the first motor is fixedly connected to a conical rotating block movably connected to the inner wall of the cooling water inlet pipe. A disc is fixedly connected to the part of the output shaft of the first motor located outside the cooling water inlet pipe, and the outer ring of the disc is connected to a dosing assembly.

[0009] Preferably, a cooling water outlet pipe is installed on the top of the heat exchange chamber away from the connecting chamber, and the side wall of the cooling water outlet pipe is connected to a first bypass, and the first bypass is connected to a first temperature sensor.

[0010] Preferably, a working fluid inlet pipe is installed at the top of the connecting bin, a working fluid outlet pipe is installed at the bottom of the connecting bin, a side wall of the working fluid outlet pipe is connected to a second bypass, and the second bypass is connected to a second temperature sensor.

[0011] Preferably, a plurality of fan-shaped flower plates are evenly installed on the top and bottom of the inner wall of the heat exchange chamber, the height of the fan-shaped flower plates is greater than the radius of the tube plate, and the heat exchange tube passes through each fan-shaped flower plate.

[0012] Preferably, a horizontally arranged turbofan is fixedly mounted at the center of the tube sheet side wall, a turbofan is also mounted between every two fan-shaped flower plates, and each turbofan and the partition plate are located in the same horizontal plane.

[0013] Preferably, a pillar is fixedly connected to the center of the inner wall of the bracket, and eight evenly distributed telescopic sleeves are fixedly provided on the outer wall of the pillar. A tension spring connected to the telescopic end is provided inside the telescopic sleeve, and the telescopic ends of every two telescopic sleeves are fixedly connected to the inner wall of an arc-shaped baffle.

[0014] Preferably, a second motor is fixedly installed on the other side of the top of the cooling water inlet pipe, and the output shaft of the second motor penetrates into the cooling water inlet pipe. The end of the output shaft of the second motor is also fixedly connected to a conical rotating block. The two conical rotating blocks have the same structure and are symmetrical to each other. A storage bin is opened on the side wall of one side of the conical rotating block, and an isolation curtain is rolled up in the storage bin.

[0015] Preferably, the dosing component includes a dosing barrel and a dosing valve, the outer ring of the disc is rotatably connected to a connecting rod, the outer wall of the cooling water inlet pipe above the first motor is fixedly provided with a slide rail, a slider is slidably connected in the slide rail, the end of the connecting rod is rotatably connected to the slider, a fixedly installed dosing barrel is provided on one side of the heat exchange chamber, the bottom end of the dosing barrel is connected to the side wall of the cooling water inlet pipe by a dosing pipe, a dosing valve is installed at the end of the dosing pipe, and the top of the slider is rotatably connected to the valve handle of the dosing valve.

[0016] Preferably, the fixed bin is provided with a first pipe opening connected to the working fluid inlet pipe, a second pipe opening connected to the cavity above the partition plate, a third pipe opening connected to the cavity below the partition plate, and a fourth pipe opening connected to the working fluid outlet pipe from top to bottom on one side close to the circular baffle.

[0017] Preferably, the reversing mechanism includes a rotating block and a third motor, the rotating block is rotatably connected inside the fixed bin, the third motor is fixedly mounted on the outer wall of the fixed bin, the output shaft of the third motor is connected to the center of the rotating block, a first through cavity and a second through cavity are provided at the top and bottom of one side of the rotating block, a third through cavity connected to the bottom side wall of the rotating block is provided at the top of the other side of the rotating block, and a fourth through cavity connected to the top side wall and the bottom of the rotating block is provided on one side of the third through cavity.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention arranges an adjustment mechanism, collects data through a first temperature sensor and a second temperature sensor to calculate the heat exchange efficiency, and the adjustment mechanism controls the rotation of the first motor and the second motor through an external controller, driving the two conical rotating blocks to approach each other or move away from each other. When the two conical rotating blocks approach each other, the outlet end of the cooling water inlet pipe is reduced. When the power of the external cooling water pump remains unchanged, the outlet pressure of the cooling water inlet pipe is increased when the outlet is reduced, thereby increasing the inlet flow rate of the cooling water. When the cooling water flow rate increases, the heat exchange efficiency of the working fluid can be improved. Conversely, when the outlet temperature of the working fluid is lower than the preset temperature, the first motor and the second motor can be rotated in the opposite direction to move the two conical rotating blocks away from each other, thereby enlarging the outlet end of the cooling water inlet pipe, reducing the outlet pressure of the cooling water inlet pipe and reducing the cooling water inlet flow rate, thereby reducing the heat exchange efficiency, and increasing the outlet temperature of the working fluid to reach the preset temperature, thereby realizing the change of the cooling water inlet flow rate without controlling the external circulating water pump, which can reduce energy consumption and achieve a smaller range of control.

[0020] The present invention sets a microchannel mechanism. The microchannel mechanism adds a bracket between the outer walls of the heat exchange tube. The bracket abuts against the heat exchange tube to offset the water hammer impact of the cooling water on the heat exchange tube during the flow of cooling water. The material of the bracket itself is the same as that of the heat exchange tube, and the abutment state is maintained. The outer wall area of ​​the heat exchange tube can be effectively expanded through the bracket. Under normal working conditions of the heat exchanger, the heat exchange area of ​​the heat exchange tube is improved, and the heat exchange efficiency can also be improved. When the regulating mechanism increases the outlet flow rate of the cooling water inlet pipe, the cooling water flow rate and pressure in the heat exchange bin are improved. When a higher flow rate flows into the bracket through the hollow groove, the inside of the bracket is filled with cooling water with a higher pressure, while the amount of cooling water in the microchannel groove is very small and the pressure is insufficient. At this time, the arc baffle can be pushed to slide and finally abut the outer wall of the heat exchange tube. At this time, the arc baffle can further expand the heat exchange area of ​​the heat exchange tube, so that the heat exchange efficiency of the heat exchanger is further improved.

[0021] The present invention provides a dosing component, which is controlled by the rotation of the first motor. When the heat exchange efficiency of the heat exchanger needs to be enhanced, the rotation of the first motor drives the conical rotating block to rotate in opposite directions to increase the cooling water flow rate. At the same time, the first motor can drive the disk to rotate and drive the connecting rod to push the slider up, so that the slider can push the valve handle to rotate and then open the dosing valve, so that the rust remover and other agents stored in the dosing barrel can flow into the cooling water inlet pipe through the dosing pipe. At this time, the cooling water in the heat exchange bin can carry the rust remover and other agents to remove the deposits or rust on the inner wall of the heat exchange bin and the outer wall of the heat exchange tube and finally flow out of the heat exchange bin with the flow of cooling water. After cleaning the deposits or rust, the heat exchange efficiency of the heat exchange tube can also be improved. Cooperating with the adjustment mechanism to adjust the cooling water flow rate, the heat exchange effect can be further improved, which plays a positive role in the heat transfer of the working fluid.

[0022] The present invention provides a reversing mechanism, and the fixed bin periodically changes the flow direction of the working medium through the reversing mechanism, so that the working medium can circulate periodically in the heat exchange tubes in the upper and lower parts. Due to the limitations of factors such as the length of the heat exchange tube and the increase of the cooling water temperature with the flow direction, the temperature distribution state of the heat exchange tube and the cooling water at different positions can be improved in actual use, so that the working medium can fully release heat to the cooling water during the flow direction cycle change, and cooperate with various components of the heat exchange bin to improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0024] Figure 2 A schematic diagram of the heat exchange tube structure of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0025] Figure 3 A schematic diagram of a turbofan structure of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0026] Figure 4 A schematic diagram of the structure of a microchannel mechanism of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0027] Figure 5 A schematic diagram of a support structure of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0028] Figure 6 A schematic diagram of the structure of an arc-shaped baffle plate for a heat exchange device for a spray freeze dryer proposed by the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of a cooling water inlet pipe of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0030] Figure 8 A schematic diagram of the structure of an adjustment mechanism of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0031] Fig. 9 A heat exchange device for a spray freeze dryer proposed by the present invention Figure 8 A magnified image of the area in the middle;

[0032] Fig.10 This is a schematic diagram of the storage bin structure of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0033] Fig.11 This is a schematic diagram of the structure of a connecting bin of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0034] Fig.12 A schematic diagram of the position of a circular baffle plate of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0035] Fig.13 A schematic diagram of the structure of a partition plate of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0036] Fig.14 A schematic diagram of the structure of a reversing mechanism of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0037] Fig.15 This is a schematic diagram of the structure of both sides of a rotating block of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0038] Fig.16 A perspective view of a rotating block of a heat exchange device for a spray freeze dryer proposed by the present invention;

[0039] Fig.17 The present invention provides a schematic diagram of the working medium flow direction when the reversing mechanism of the heat exchange device for the spray freeze dryer is in operation.

[0040] In the figure: 1, heat exchange chamber; 2, connecting chamber; 3, cooling water inlet pipe; 4, cooling water outlet pipe; 401, first bypass; 5, working fluid inlet pipe; 6, working fluid outlet pipe; 7, second bypass; 8, heat exchange tube; 9, tube sheet; 901, fan-shaped flower plate; 10, turbofan; 11, microchannel mechanism; 12, bracket; 13, microchannel groove; 14, pillar; 15, telescopic sleeve; 16, arc baffle; 17, adjustment mechanism; 18, first motor; 181, second motor; 19, conical rotating block; 20, Storage bin; 21. Isolation curtain; 22. Dosing assembly; 23. Disc; 24. Connecting rod; 25. Sliding block; 26. Dosing barrel; 27. Dosing tube; 28. Dosing valve; 29. ​​Valve handle; 30. Partition plate; 31. Circular baffle; 32. Fixed bin; 33. First pipe opening; 34. Second pipe opening; 35. Third pipe opening; 36. Fourth pipe opening; 37. Reversing mechanism; 38. Rotating block; 39. Third motor; 40. First through cavity; 41. Second through cavity; 42. Third through cavity; 43. Fourth through cavity. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] Reference Figure 1-17 , a heat exchange device for a spray freeze dryer, comprising a heat exchange bin 1 and a heat exchange tube 8, a cooling water inlet pipe 3 is installed on one side of the bottom end of the heat exchange bin 1, an adjusting mechanism 17 including a first motor 18 and a conical rotating block 19 is arranged on the top of the cooling water inlet pipe 3, tube sheets 9 are fixedly installed at both ends of the heat exchange bin 1, a plurality of evenly distributed heat exchange tubes 8 are fixedly installed between the two tube sheets 9, a plurality of evenly distributed microchannel mechanisms 11 including brackets 12 and microchannel grooves 13 are arranged between every four heat exchange tubes 8, a connecting bin 2 is connected to one side of the heat exchange bin 1, a horizontally arranged partition plate 30 connected to the center of the tube sheet 9 is fixedly installed on the side of the connecting bin 2 close to the tube sheet 9, a vertically arranged circular baffle 31 is fixedly connected to one side of the partition plate 30, the diameter of the circular baffle 31 is the same as the inner diameter of the connecting bin 2, a fixed bin 32 is arranged inside the connecting bin 2, and a reversing mechanism 37 is arranged inside the fixed bin 32;

[0043] The bracket 12 is a hollow structure, with hollow grooves at the top and bottom of the bracket 12, and a plurality of sunken through holes at both sides of the bracket 12. The bracket 12 is respectively in contact with four heat exchange tubes 8 on all sides, and a microchannel groove 13 is formed between the outer wall of the heat exchange tube 8 and the sunken structure of the bracket 12. Four arc-shaped baffles 16 are slidably connected to the bracket 12.

[0044] A first motor 18 is fixedly installed on the top side wall of the cooling water inlet pipe 3, and the output shaft of the first motor 18 penetrates into the cooling water inlet pipe 3. The end of the output shaft of the first motor 18 is fixedly connected to a conical rotating block 19 movably connected to the inner wall of the cooling water inlet pipe 3. A disc 23 is fixedly connected to the part of the output shaft of the first motor 18 located outside the cooling water inlet pipe 3, and the outer ring of the disc 23 is connected to the dosing assembly 22.The heat exchanger transfers the heat of the high-temperature working fluid after use in the spray freeze dryer to the external cooling water, so that the working fluid can be recycled and reused, and can also improve the working effect of the subsequent spray freeze dryer by lowering the working fluid temperature. Due to the physical property of temperature ascending, the cooling water flows from bottom to top, and the cooling water inlet pipe 3 is pumped by the external cooling water circulation pump. The regulating mechanism 17 controls the rotation of the first motor 18 and the second motor 181 through the external controller, driving the two conical rotating blocks 19 to approach or move away from each other. Due to the conical structure of the conical rotating block 19 with a small top and a large bottom, when the two conical rotating blocks 19 approach each other, the outlet end of the cooling water inlet pipe 3 is reduced. Under the condition that the power of the external cooling water pump remains unchanged, When the outlet is reduced, the outlet pressure of the cooling water inlet pipe 3 increases, thereby increasing the inlet flow rate of the cooling water. When the cooling water flow rate increases, the heat exchange efficiency of the working medium can be improved. On the contrary, when the outlet temperature of the working medium is lower than the preset temperature, the first motor 18 and the second motor 181 can be rotated in the opposite direction so that the two conical rotating blocks 19 move away from each other, thereby enlarging the outlet end of the cooling water inlet pipe 3, reducing the outlet pressure of the cooling water inlet pipe 3 and reducing the inlet flow rate of the cooling water, thereby reducing the heat exchange efficiency, and increasing the outlet temperature of the working medium to reach the preset temperature, thereby realizing the change of the inlet flow rate of the cooling water without controlling the external circulating water pump, which can reduce energy consumption and achieve a smaller range of control. 8, the connecting chamber 2 is divided into an upper and a lower part by the circular baffle 31 and the partition plate 30, so that the heat exchange tube 8 is also divided into an upper and a lower part, which can be used for the inflow and outflow of the working medium. The outer wall of the heat exchange tube 8 is directly in contact with the flowing cooling water, and the heat of the working medium is transferred to the cooling water during the flow process. The microchannel mechanism 11 adds a bracket 12 between the outer walls of the heat exchange tube 8. The bracket 12 abuts against the heat exchange tube 8 to offset the water hammer impact of the cooling water on the heat exchange tube 8 during the flow of the cooling water. Due to the setting of the microchannel groove 13 and the characteristic that the cooling water fills the heat exchange chamber 1 during operation, the cooling water can still maintain contact with the heat exchange tube 8 in the flow mode, and the material of the bracket 12 itself is the same as that of the heat exchange tube 8. , while maintaining the abutment state, the outer wall area of ​​the heat exchange tube 8 can be effectively expanded through the bracket 12. Under the normal working state of the heat exchanger, the increase in the heat exchange area of ​​the heat exchange tube 8 can also improve the heat exchange efficiency. When the regulating mechanism 17 increases the outlet flow rate of the cooling water inlet pipe 3, the cooling water flow rate and pressure in the heat exchange bin 1 are improved. When a higher flow rate flows into the bracket 12 through the hollow groove, the inside of the bracket 12 is filled with cooling water with a higher pressure, while the amount of cooling water in the microchannel groove 13 is very small and the pressure is insufficient. At this time, the arc baffle 16 can be pushed to slide and finally abut the outer wall of the heat exchange tube 8. At this time, the arc baffle 16 can further expand the heat exchange area of ​​the heat exchange tube 8, so that the heat exchange efficiency of the heat exchanger is further improved.

[0045] As a technical optimization solution of the present invention, a cooling water outlet pipe 4 is installed on the top of the heat exchange chamber 1 away from the connecting chamber 2, and the side wall of the cooling water outlet pipe 4 is connected to a first bypass 401, and the first bypass 401 is connected to a first temperature sensor. The first temperature sensor can monitor the cooling water temperature of the cooling water outlet pipe 4 in real time, and the heat exchange efficiency can be calculated in combination with the cooling water inlet temperature and the working medium outlet temperature, which can be easily adjusted.

[0046] As a technical optimization solution of the present invention, a working fluid inlet pipe 5 is installed at the top of the connecting bin 2, a working fluid outlet pipe 6 is installed at the bottom of the connecting bin 2, a second bypass 7 is connected to the side wall of the working fluid outlet pipe 6, and a second temperature sensor is connected to the second bypass 7. The second temperature sensor can monitor the working fluid temperature of the working fluid outlet pipe 6 in real time, and perform a detailed calculation of the heat exchange efficiency in combination with the working fluid inlet temperature and the cooling water outlet temperature, so that the adjustment of the heat exchange efficiency is supported by data.

[0047] As a technical optimization solution of the present invention, a plurality of fan-shaped flower plates 901 are evenly installed on the top and bottom of the inner wall of the heat exchange bin 1, the height of the fan-shaped flower plates 901 is greater than the radius of the tube sheet 9, and the heat exchange tube 8 passes through each fan-shaped flower plate 901. The fan-shaped flower plates 901 can be used to support the heat exchange tube 8, and can also limit the flow direction of the cooling water through the fan-shaped flower plates 901, so that the cooling water can fill the entire heat exchange bin 1 and fully perform heat exchange.

[0048] As a technical optimization solution of the present invention, a horizontally arranged turbofan 10 is fixedly installed at the center of the side wall of the tube sheet 9, and a turbofan 10 is also installed between every two fan-shaped flower plates 901, and each turbofan 10 and the partition plate 30 are located at the same horizontal plane. When the cooling water flows through the turbofan 10, it can drive the turbofan 10 to rotate, and the rotating turbofan 10 can also enhance the turbulence, so that the cooling water flow heat exchange effect is increased, and when the regulating mechanism 17 increases the outlet flow rate of the cooling water inlet pipe 3, the speed of the turbofan 10 can also increase, and vice versa, the speed of the turbofan 10 decreases.

[0049] As a technical optimization solution of the present invention, a support 14 is fixedly connected to the center of the inner wall of the bracket 12, and eight evenly distributed telescopic sleeves 15 are fixedly arranged on the outer wall of the support 14. A tension spring connected to the telescopic end is arranged inside the telescopic sleeve 15, and the telescopic ends of every two telescopic sleeves 15 are fixedly connected to the inner wall of an arc-shaped baffle 16. When the cooling water pressure inside the bracket 12 is not enough to offset the tension of the tension spring, the arc-shaped baffle 16 is stored in the microchannel groove 13, and when the regulating mechanism 17 increases the outlet flow rate of the cooling water inlet pipe 3, the arc-shaped baffle 16 can further expand the heat exchange area of ​​the heat exchange tube 8, so that the heat exchange efficiency of the heat exchanger is further improved.

[0050] As a technical optimization solution of the present invention, a second motor 181 is fixedly installed on the other side of the top of the cooling water inlet pipe 3, and the output shaft of the second motor 181 penetrates into the cooling water inlet pipe 3. The end of the output shaft of the second motor 181 is also fixedly connected to a conical rotating block 19. The two conical rotating blocks 19 have the same structure and are symmetrical to each other. A storage bin 20 is provided on the side wall of one side of the conical rotating block 19, and an isolation curtain 21 is rolled up in the storage bin 20. The bottoms of the two conical rotating blocks 19 are connected to the inner wall of the cooling water inlet pipe 3, so that the outlet size of the cooling water inlet pipe 3 can be mainly controlled by the top size of the two conical rotating blocks 19. The isolation curtain 21 can connect the gap between the two conical rotating blocks 19, so that the two conical rotating blocks 19 form a whole, ensuring that the cooling water flowability is not affected, and the isolation curtain 21 can move with the two conical rotating blocks 19 through the winding shaft.

[0051] As a technical optimization solution of the present invention, the dosing component 22 includes a dosing barrel 26 and a dosing valve 28. The outer ring of the disc 23 is rotatably connected to the connecting rod 24. A slide rail is fixedly provided on the outer wall of the cooling water inlet pipe 3 above the first motor 18. A slider 25 is slidably connected in the slide rail. The end of the connecting rod 24 is rotatably connected to the slider 25. A fixedly installed dosing barrel 26 is provided on one side of the heat exchange chamber 1. A dosing pipe 27 is connected to the bottom end of the dosing barrel 26 and the side wall of the cooling water inlet pipe 3. A dosing valve 28 is installed at the end of the dosing pipe 27. The top of the slider 25 is rotatably connected to the valve handle 29 of the dosing valve 28. The dosing component 22 is controlled by the rotation of the first motor 18. When the heat exchange efficiency of the heat exchanger needs to be enhanced, the first motor 18 rotates to drive the conical rotating block 19 to rotate in opposite directions to increase the cooling water flow rate. At the same time, the first motor 18 can drive the disc 23 to rotate and drive the connecting rod 24 to push the slider 25 up, so that the slider 25 can push the valve handle 29 to rotate and then open the dosing valve 28, so that the rust remover and other agents stored in the dosing barrel 26 can flow into the cooling water inlet pipe 3 through the dosing pipe 27. At this time, the cooling water in the heat exchange bin 1 can carry the rust remover and other agents to remove the sediment or rust on the inner wall of the heat exchange bin 1 and the outer wall of the heat exchange tube 8 and finally flow out of the heat exchange bin 1 with the flow of cooling water. After cleaning the sediment or rust, the heat exchange efficiency of the heat exchange tube 8 can also be improved. Cooperating with the adjustment mechanism 17 to adjust the cooling water flow rate, the heat exchange effect can be further improved, which plays a positive role in the heat transfer of the working fluid.

[0052] As a technical optimization solution of the present invention, the fixed bin 32 is provided with a first pipe opening 33 connected to the working medium inlet pipe 5, a second pipe opening 34 connected to the upper cavity of the partition plate 30, a third pipe opening 35 connected to the lower cavity of the partition plate 30, and a fourth pipe opening 36 connected to the working medium outlet pipe 6 from top to bottom on the side close to the circular baffle 31. The fixed bin 32 periodically changes the flow direction of the working medium through the reversing mechanism 37, so that the working medium can circulate periodically in the upper and lower parts of the heat exchange tube 8. Due to the limitations of the length of the heat exchange tube 8 and the increase of the cooling water temperature with the flow direction, the temperature distribution state of the heat exchange tube 8 and the cooling water at different positions can be improved in actual use, so that the working medium can fully release heat to the cooling water during the flow cycle change, and cooperate with the various components of the heat exchange bin 1 to improve the heat exchange efficiency.

[0053] As a technical optimization solution of the present invention, the reversing mechanism 37 includes a rotating block 38 and a third motor 39. The rotating block 38 is rotatably connected inside the fixed bin 32, and the third motor 39 is fixedly installed on the outer wall of the fixed bin 32. The output shaft of the third motor 39 is connected to the center of the rotating block 38. A first through cavity 40 and a second through cavity 41 are provided at the top and bottom of one side of the rotating block 38, and a third through cavity 42 connected to the bottom side wall of the rotating block 38 is provided at the top of the other side of the rotating block 38. A fourth through cavity 43 connected to the top side wall and the bottom of the rotating block 38 is provided on one side of the third through cavity 42. By rotating the third motor 39 to drive the rotating block 38 to perform a periodic 180-degree rotation, the first through cavity 40 can be connected to the first pipe opening 33 and the second pipe opening 34, and the second through cavity 41 can be connected to the third pipe opening 35 and the fourth pipe opening 36, so that the working medium flows into the upper heat exchange tube 8 through the working medium inlet pipe 5, and then flows out to the working medium outlet pipe 6 through the lower heat exchange tube 8, or the third through cavity 42 can be connected to the first pipe opening 33 and the third pipe opening 35, and the fourth through cavity 43 can be connected to the second pipe opening 34 and the fourth pipe opening 36, so that the working medium flows into the lower heat exchange tube 8 through the working medium inlet pipe 5, and then flows out to the working medium outlet pipe 6 through the upper heat exchange tube 8, so that the working medium flow direction can be periodically changed in direction, which has a positive significance for improving the heat exchange efficiency. In conjunction with the function of the regulating mechanism 17, the heat exchange efficiency of the heat exchanger can be effectively improved.

[0054] When the present invention is in use, the external cooling water circulation pump is started to pump the cooling water into the cooling water inlet pipe 3 and flow through the two conical rotating blocks 19 and then flow into the heat exchange chamber 1. The fan-shaped flower plate 901 limits the flow direction of the cooling water, so that the cooling water can flow up and down to fill the entire heat exchange chamber 1 and then flow out of the cooling water outlet pipe 4, while the working fluid flows into the upper heat exchange tube 8 through the working fluid inlet pipe 5, and then flows out to the working fluid outlet pipe 6 through the lower heat exchange tube 8. At this time, the excess heat carried by the working fluid can be transferred to the cooling water. The cooling water flowing through the bracket 12 can flow into the microchannel groove 13 and contact the outer wall of the heat exchange tube 8. When the cooling water flows through the turbofan 10, it can drive the turbofan 10 to rotate, and the rotating turbofan 10 can enhance turbulence, through the third motor 39 The rotation drives the rotating block 38 to perform a periodic 180-degree rotation, so that the first through cavity 40 is connected with the first pipe opening 33 and the second pipe opening 34, and the second through cavity 41 is connected with the third pipe opening 35 and the fourth pipe opening 36, so that the working medium flows into the upper heat exchange tube 8 through the working medium inlet pipe 5, and then flows out to the working medium outlet pipe 6 through the lower heat exchange tube 8, or the third through cavity 42 is connected with the first pipe opening 33 and the third pipe opening 35, and the fourth through cavity 43 is connected with the second pipe opening 34 and the fourth pipe opening 36, so that the working medium flows into the lower heat exchange tube 8 through the working medium inlet pipe 5, and then flows out to the working medium outlet pipe 6 through the upper heat exchange tube 8, so that the flow direction of the working medium can be periodically changed.

[0055] The first temperature sensor can monitor the cooling water temperature of the cooling water outlet pipe 4 in real time, and the second temperature sensor can monitor the working medium temperature of the working medium outlet pipe 6 in real time. The heat exchange efficiency is calculated by combining parameters such as the cooling water inlet temperature, the cooling water outlet temperature and the working medium outlet temperature. When the heat exchange efficiency needs to be improved, the regulating mechanism 17 controls the rotation of the first motor 18 and the second motor 181 through an external controller, driving the two conical rotating blocks 19 to approach each other. Due to the conical structure of the conical rotating blocks 19, which are small at the top and large at the bottom, when the two conical rotating blocks 19 approach each other, the outlet end of the cooling water inlet pipe 3 is reduced. When the power of the external cooling water pump remains unchanged, the outlet pressure of the cooling water inlet pipe 3 increases when the outlet is reduced, thereby increasing the inlet flow rate of the cooling water. When the cooling water flow rate increases, the cooling water flow rate and pressure in the heat exchange chamber 1 are improved, and a higher When the flow rate flows into the interior of the bracket 12 through the hollow groove, the interior of the bracket 12 is filled with cooling water with a higher pressure, while the amount of cooling water in the microchannel groove 13 is very small and the pressure is insufficient. At this time, the arc baffle 16 can be pushed to slide and finally abut the outer wall of the heat exchange tube 8. At this time, the arc baffle 16 can further expand the heat exchange area of ​​the heat exchange tube 8. At the same time, the speed of the turbofan 10 can also increase, and the first motor 18 can drive the disc 23 to rotate and drive the connecting rod 24 to push the slider 25 up, so that the slider 25 can push the valve handle 29 to rotate and then open the dosing valve 28, so that the rust remover and other agents stored in the dosing barrel 26 can flow into the cooling water inlet pipe 3 through the dosing pipe 27. At this time, the cooling water in the heat exchange bin 1 can carry the rust remover and other agents to remove the sediment or rust on the inner wall of the heat exchange bin 1 and the outer wall of the heat exchange tube 8, and finally flow out of the heat exchange bin 1 with the flow of cooling water.

[0056] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0057] What has been described above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat exchange device for a spray freeze dryer, comprising a heat exchange chamber (1) and a heat exchange tube (8), characterized in that: A cooling water inlet pipe (3) is installed on one side of the bottom end of the heat exchange chamber (1), and an adjustment mechanism (17) including a first motor (18) and a conical rotating block (19) is arranged on the top of the cooling water inlet pipe (3). Tube sheets (9) are fixedly installed at both ends of the heat exchange chamber (1), and a plurality of evenly distributed heat exchange tubes (8) are fixedly installed between the two tube sheets (9), and a plurality of evenly distributed microchannels including brackets (12) and microchannel grooves (13) are arranged between every four heat exchange tubes (8). The heat exchange chamber (1) has a connecting chamber (2) connected to one side thereof, a horizontally arranged partition plate (30) connected to the center of the tube sheet (9) is fixedly installed on the side of the connecting chamber (2) close to the tube sheet (9), a vertically arranged circular baffle (31) is fixedly connected to one side of the partition plate (30), the diameter of the circular baffle (31) is the same as the inner diameter of the connecting chamber (2), a fixed chamber (32) is arranged inside the connecting chamber (2), and a reversing mechanism (37) is arranged inside the fixed chamber (32); The bracket (12) is a hollow structure, the top and bottom of the bracket (12) are provided with hollow grooves, the two sides of the bracket (12) are provided with a plurality of sunken through holes, the bracket (12) is respectively in contact with four heat exchange tubes (8) on all sides, a microchannel groove (13) is formed between the outer wall of the heat exchange tube (8) and the sunken structure of the bracket (12), and four arc-shaped baffles (16) are slidably connected on all sides of the bracket (12); A first motor (18) is fixedly mounted on the top side wall of the cooling water inlet pipe (3); an output shaft of the first motor (18) penetrates into the interior of the cooling water inlet pipe (3); a conical rotating block (19) movably connected to the inner wall of the cooling water inlet pipe (3) is fixedly connected to the end of the output shaft of the first motor (18); a disc (23) is fixedly connected to the part of the output shaft of the first motor (18) located outside the cooling water inlet pipe (3); and a dosing assembly (22) is connected to the outer ring of the disc (23).

2. A heat exchange device for a spray freeze dryer according to claim 1, characterized in that: A cooling water outlet pipe (4) is installed on the top of the heat exchange chamber (1) away from the connecting chamber (2), and the side wall of the cooling water outlet pipe (4) is connected to a first bypass (401), and the first bypass (401) is connected to a first temperature sensor.

3. A heat exchange device for a spray freeze dryer according to claim 1, characterized in that: A working fluid inlet pipe (5) is installed at the top of the connecting chamber (2), a working fluid outlet pipe (6) is installed at the bottom of the connecting chamber (2), a side wall of the working fluid outlet pipe (6) is connected to a second bypass (7), and the second bypass (7) is connected to a second temperature sensor.

4. A heat exchange device for a spray freeze dryer according to claim 1, characterized in that: A plurality of fan-shaped flower plates (901) are evenly installed on the top and bottom of the inner wall of the heat exchange chamber (1), the height of the fan-shaped flower plates (901) is greater than the radius of the tube plate (9), and the heat exchange tube (8) passes through each fan-shaped flower plate (901).

5. A heat exchange device for a spray freeze dryer according to claim 4, characterized in that: A horizontally arranged turbofan (10) is fixedly installed at the center of the side wall of the tube sheet (9), and a turbofan (10) is also installed between every two fan-shaped flower plates (901). Each turbofan (10) and the partition plate (30) are located on the same horizontal plane.

6. A heat exchange device for a spray freeze dryer according to claim 1, characterized in that: A pillar (14) is fixedly connected to the center of the inner wall of the support (12), and eight evenly distributed telescopic sleeves (15) are fixedly arranged on the outer wall of the pillar (14). A tension spring connected to the telescopic end is arranged inside the telescopic sleeve (15), and the telescopic ends of every two telescopic sleeves (15) are fixedly connected to the inner wall of an arc-shaped baffle (16).

7. A heat exchange device for a spray freeze dryer according to claim 1, characterized in that: A second motor (181) is fixedly installed on the other side of the top of the cooling water inlet pipe (3), and the output shaft of the second motor (181) penetrates into the interior of the cooling water inlet pipe (3). The end of the output shaft of the second motor (181) is also fixedly connected to a conical rotating block (19). The two conical rotating blocks (19) have the same structure and are symmetrical to each other. A storage bin (20) is provided on the side wall of one side of the conical rotating block (19), and an isolation curtain (21) is rolled up in the storage bin (20).

8. A heat exchange device for a spray freeze dryer according to claim 1, characterized in that: The dosing assembly (22) comprises a dosing barrel (26) and a dosing valve (28); the outer ring of the disc (23) is rotatably connected to a connecting rod (24); a slide rail is fixedly provided on the outer wall of the cooling water inlet pipe (3) above the first motor (18); a slider (25) is slidably connected inside the slide rail; the end of the connecting rod (24) is rotatably connected to the slider (25); a fixedly installed dosing barrel (26) is provided on one side of the heat exchange chamber (1); a dosing pipe (27) is connected to the bottom end of the dosing barrel (26) and the side wall of the cooling water inlet pipe (3); a dosing valve (28) is installed at the end of the dosing pipe (27); and the top of the slider (25) is rotatably connected to a valve handle (29) of the dosing valve (28).

9. A heat exchange device for a spray freeze dryer according to claim 3, characterized in that: The fixed bin (32) is provided with, from top to bottom, a first pipe opening (33) connected to the working medium inlet pipe (5), a second pipe opening (34) connected to the cavity above the partition plate (30), a third pipe opening (35) connected to the cavity below the partition plate (30), and a fourth pipe opening (36) connected to the working medium outlet pipe (6), respectively, on a side close to the circular baffle plate (31).

10. A heat exchange device for a spray freeze dryer according to claim 1, characterized in that: The reversing mechanism (37) comprises a rotating block (38) and a third motor (39); the rotating block (38) is rotatably connected inside the fixed bin (32); the third motor (39) is fixedly mounted on the outer wall of the fixed bin (32); the output shaft of the third motor (39) is connected to the center of the rotating block (38); a first through cavity (40) and a second through cavity (41) are provided at the top and bottom of one side of the rotating block (38); a third through cavity (42) connected to the side wall of the bottom of the rotating block (38) is provided at the top of the other side of the rotating block (38); and a fourth through cavity (43) connected to the side wall and the bottom of the top of the rotating block (38) is provided on one side of the third through cavity (42).

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