Pillow-shaped plate type decompression sublimation crystallizer

Abstract

The invention relates to the technical field of sublimation crystallizers, in particular to a pillow-shaped plate type decompression sublimation crystallizer which comprises a sublimation tank body, a first crystallization tank body is arranged on the side of the sublimation tank body, a second crystallization tank body is arranged on the side of the first crystallization tank body, and the upper surface of the sublimation tank body is communicated with a first ventilation pipe. The bottom of the side wall of the first crystallization tank body is communicated with a first ventilation pipe, the output end of the first ventilation pipe is communicated with the interior of the first crystallization tank body, the bottom of the side wall of the first crystallization tank body is communicated with a second ventilation pipe, the output end of the second ventilation pipe is communicated with the interior of the second crystallization tank body, a feeding opening is formed in the upper surface of the sublimation tank body, and a sealing cover plate is arranged at the input end of the feeding opening. According to the invention, the sublimation tank body can be efficiently and uniformly heated through the arranged water bath heating assembly, the crystallization efficiency of the crystallizer can be improved through the arranged pressure reduction synergistic assembly, and the crystallization operation with higher purity and higher efficiency can be realized through the arranged crystallization assembly.

Description

Technical Field

[0001] The invention relates to the technical field of sublimation crystallizers, and in particular to a pillow-shaped plate-type reduced-pressure sublimation crystallizer. Background Art

[0002] Sublimation crystallization is the process in which a substance changes directly from a solid state to a gas state and then from a gas state back to a solid state. During the sublimation process, a substance changes directly from a solid state to a gas state, skipping the liquid state, without going through the liquid stage. Under normal circumstances, substances at room temperature and pressure, such as ice, can sublime directly into water vapor without passing through the liquid state. This is because under certain temperature and pressure conditions, the saturated vapor pressure of a substance is equal to the saturated vapor pressure in equilibrium with its liquid phase. This temperature is called the sublimation temperature of the substance. Sublimation crystallization has some special applications. For example, sublimation can be used to remove impurities from solid substances. Pure substances can be separated by sublimation. This method is widely used in chemical laboratories and industrial production. In addition, sublimation is also used in some drying technologies. For example, in a high humidity environment, when the condensation machinery cannot effectively remove moisture, sublimation can be used to convert the substance from a wet state to a dry state.

[0003] After searching, the patent document with publication number CN209500855U discloses a sublimation crystallization device for testing the purity of chemical components of traditional Chinese medicine preparations, including a hot oil heater, a sublimation kettle, a crystallization kettle and a cooling water tank, wherein: the sublimation kettle includes a sublimator, a first shell, and a first interlayer formed between the sublimator and the first shell, and the first interlayer is connected to the hot oil heater through an oil outlet pipe and an oil return pipe; the crystallization kettle includes a crystallizer, a second shell, and a second interlayer formed between the crystallizer and the second shell. It is safe and efficient, easy to operate, has low heat loss, high thermal efficiency, fast crystallization speed, and good sublimation crystallization effect.

[0004] The above prior art often has the following problems when used: The existing sublimation crystallizer has low crystallization efficiency when in use. Since the process of direct condensation and crystallization of substances from the gas state has high requirements on the temperature and other environmental conditions, the temperature control of the crystallizer has a greater impact on the crystallization efficiency. More precise temperature control and more uniform heating methods can improve the crystallization efficiency. In addition, the existing technology also has problems such as low crystallization purity, slow crystallization speed and unstable crystallization quality. Some substances contain components with similar condensation temperatures, which can easily be mixed with impurities during the crystallization process, reducing the purity of the product. Corresponding measures are needed to solve this problem. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a pillow-shaped plate-type vacuum sublimation crystallizer, which can effectively solve the problems of low crystallization efficiency, low crystallization purity, slow crystallization speed and unstable crystallization quality in the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a pillow-type plate-type decompression sublimation crystallizer, comprising a sublimation tank body, a first crystallization tank body is arranged on the side of the sublimation tank body, a second crystallization tank body is arranged on the side of the first crystallization tank body, a first vent pipe is connected to the upper surface of the sublimation tank body, an output end of the first vent pipe is connected to the interior of the first crystallization tank body, a second vent pipe is connected to the bottom of the side wall of the first crystallization tank body, an output end of the second vent pipe is connected to the interior of the second crystallization tank body, a feed port is arranged on the upper surface of the sublimation tank body, a sealing cover plate is arranged at the input end of the feed port, and sealing doors are arranged on the side walls of the first crystallization tank body and the second crystallization tank body; The crystallization mechanism comprises a water bath heating component, a decompression and synergistic component and two crystallization components, and the two crystallization components are respectively located in a No. 1 crystallization tank body and a No. 2 crystallization tank body.

[0007] According to the above-mentioned pillow-type plate-type vacuum sublimation crystallizer, the water bath heating assembly includes a water bath jacket sleeved on the sublimation tank body, the side wall of the water bath jacket is connected to a No. 1 water inlet pipe, the side wall of the water bath jacket is connected to a No. 1 water outlet pipe, and the input end of the No. 1 water inlet pipe and the output end of the No. 1 water outlet pipe are both equipped with valves.

[0008] According to the above-mentioned pillow-type plate-type reduced-pressure sublimation crystallizer, the reduced-pressure enhancement component includes an air inlet pipe connected to the upper surface of the sublimation tank body, the upper surface of the No. 2 crystallization tank body is connected to an air outlet pipe, and the input end of the air inlet pipe and the output end of the air outlet pipe are both equipped with air valves.

[0009] According to the above-mentioned pillow-type plate-type vacuum sublimation crystallizer, the crystallization component includes a card slot arranged in the bottom surface of a No. 1 crystallization tank body, a plurality of fixed blocks are clamped in the card slot, the upper surfaces of the plurality of fixed blocks are fixedly connected with pillow-type crystallization plates, the side walls of the plurality of pillow-type crystallization plates are provided with a plurality of welds and welding rings, the upper half of the side wall of the No. 1 crystallization tank body is connected with a water inlet main pipe, a water inlet distribution pipe is arranged in the No. 1 crystallization tank body, the output end of the water inlet main pipe is connected with the side wall of the water inlet distribution pipe, and the side wall of the water inlet distribution pipe is connected with a plurality of A No. 2 water inlet pipe is provided, and the output ends of the multiple No. 2 water inlet pipes are respectively connected with the side walls of the multiple pillow-shaped crystallization plates, and the bottoms of the side walls of the multiple pillow-shaped crystallization plates are all connected with a No. 2 water outlet pipe. A water outlet collecting pipe is provided in the No. 2 crystallization tank body, and the side wall of the water outlet collecting pipe is connected with the output ends of the multiple No. 2 water outlet pipes. The side wall of the water outlet collecting pipe is connected with a water outlet main pipe, and the water outlet main pipe penetrates the side wall of the No. 1 crystallization tank body and extends to the outside of the No. 1 crystallization tank body. The input end of the water inlet main pipe and the output end of the water outlet main pipe are both equipped with valves.

[0010] According to the above-mentioned pillow-type plate-type reduced-pressure sublimation crystallizer, the No. 1 crystallization tank body and the No. 2 crystallization tank body are both located on the same side of the sublimation tank body, the sublimation tank body and the No. 1 crystallization tank body are connected through a No. 1 ventilation pipe, and the No. 1 crystallization tank body and the No. 2 crystallization tank body are connected through a No. 2 ventilation pipe.

[0011] According to the above-mentioned pillow-shaped plate-type vacuum sublimation crystallizer, the No. 1 water inlet pipe and the No. 1 water outlet pipe are respectively located on both sides of the water bath jacket, and the sublimation tank body is located in the water bath jacket.

[0012] According to the above-mentioned pillow-type plate-type vacuum sublimation crystallizer, the air inlet pipe is located on the side of the feed port, the air outlet pipe is connected to the interior of the No. 2 crystallization tank body, and the two sealing doors are located on the same side of the No. 1 crystallization tank body and the No. 2 crystallization tank body.

[0013] According to the above-mentioned pillow-shaped plate type vacuum sublimation crystallizer, a plurality of the pillow-shaped crystallization plates are arranged equidistantly, the pillow-shaped crystallization plates are formed by welding and inflating two stainless steel plates, the water inlet distribution pipe and the water outlet collecting pipe are in a parallel positional relationship, the water inlet distribution pipe and the water inlet main pipe are vertically arranged, and the water outlet collecting pipe and the water outlet main pipe are vertically arranged.

[0014] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: 1. The water bath heating assembly provided in the present invention can realize efficient and uniform heating of the sublimation tank. For the sublimation process, especially for the sublimation of heat-sensitive substances, such a stable temperature environment is crucial. Water bath heating can accurately control the temperature within a suitable range, and the temperature fluctuation is very small, which is conducive to the stable sublimation of these substances and avoids the decomposition of substances or other side reactions caused by excessively high temperature, thereby improving the purity of the product and reducing the generation of impurities.

[0015] 2. The present invention is beneficial to improving the crystallization efficiency of the crystallizer by setting up a decompression and efficiency-enhancing component. By introducing an inert gas into the crystallizer or connecting a vacuum device at the output end, the gaseous sublimated material can flow quickly in the crystal, thereby helping to improve the crystallization efficiency.

[0016] 3. The present invention can achieve a higher purity and higher efficiency crystallization operation by setting up a crystallization component. The heat exchange structure used in the crystallization component has a larger heat exchange area, which makes the heat exchange efficiency higher, thereby greatly improving the efficiency of crystallization. At the same time, multiple groups of crystallization components cooperate with each other, and through a special temperature control mechanism, the separation of different components can be achieved, which is beneficial to improving the purity of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure analysis of the present invention; Figure 2 A schematic diagram of a three-dimensional structural analysis of the present invention from another viewing angle; Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 4 A schematic diagram of a three-dimensional structure from another viewing angle of the present invention; Figure 5 for Figure 2 Enlarged view of point A in the middle.

[0019] Figure numerals: 1, sublimation tank body; 2, crystallization tank body No. 1; 3, crystallization tank body No. 2; 4, ventilation pipe No. 1; 5, ventilation pipe No. 2; 6, feed port; 7, sealing door; 8, water bath jacket; 9, water inlet pipe No. 1; 10, water outlet pipe No. 1; 11, air inlet pipe; 12, air outlet pipe; 13, slot; 14, fixing block; 15, pillow-type crystallization plate; 16, welding seam; 17, welding ring; 18, water inlet main pipe; 19, water inlet distribution pipe; 20, water inlet pipe No. 2; 21, water outlet pipe No. 2; 22, water outlet collecting pipe; 23, water outlet main pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] Example: Refer to Figures 1 to 5A pillow-type plate-type decompression sublimation crystallizer comprises a sublimation tank body 1, a No. 1 crystallization tank body 2 is arranged on the side of the sublimation tank body 1, a No. 2 crystallization tank body 3 is arranged on the side of the No. 1 crystallization tank body 2, a No. 1 ventilation pipe 4 is connected to the upper surface of the sublimation tank body 1, the output end of the No. 1 ventilation pipe 4 is connected to the interior of the No. 1 crystallization tank body 2, a No. 2 ventilation pipe 5 is connected to the bottom of the side wall of the No. 1 crystallization tank body 2, the output end of the No. 2 ventilation pipe 5 is connected to the interior of the No. 2 crystallization tank body 3, a feed port 6 is arranged on the upper surface of the sublimation tank body 1, a sealing cover plate is arranged at the input end of the feed port 6, the side walls of the No. 1 crystallization tank body 2 and the No. 2 crystallization tank body 3 are both equipped with sealing doors 7, and the No. 1 crystallization tank body 2 is connected to the No. 2 crystallization tank body 3. The crystal tank body 2 and the second crystal tank body 3 are both located on the same side of the sublimation tank body 1. The sublimation tank body 1 is connected to the first crystal tank body 2 through the first ventilation pipe 4, and the first crystal tank body 2 is connected to the second crystal tank body 3 through the second ventilation pipe 5. The sublimation tank body 1 is used as the starting point for the sublimation of the substance. The first crystal tank body 2 and the second crystal tank body 3 are sequentially arranged on its side. The three are sequentially connected through the first ventilation pipe 4 and the second ventilation pipe 5 to form a complete sublimation crystallization system. The feed port 6 on the upper surface of the sublimation tank body 1 is used to put in the raw materials to be sublimated and crystallized. The cover plate ensures the sealing of the feed port 6 in the non-feeding state to prevent impurities from entering and material leakage; The crystallization mechanism comprises a water bath heating component, a decompression and synergistic component and two crystallization components, the two crystallization components are respectively located in a No. 1 crystallization tank body 2 and a No. 2 crystallization tank body 3, the water bath heating component comprises a water bath jacket 8 sleeved on the sublimation tank body 1, the side wall of the water bath jacket 8 is connected to a No. 1 water inlet pipe 9, the side wall of the water bath jacket 8 is connected to a No. 1 water outlet pipe 10, the input end of the No. 1 water inlet pipe 9 and the output end of the No. 1 water outlet pipe 10 are both equipped with valves, the decompression and synergistic component comprises an air inlet pipe 11 connected to the upper surface of the sublimation tank body 1, the upper surface of the No. 2 crystallization tank body 3 is connected to an air outlet pipe 12, the input end of the air inlet pipe 11 and the air outlet pipe 1 2 are equipped with air valves at the output ends, the crystallization assembly includes a slot 13 arranged on the inner bottom surface of the No. 1 crystallization tank body 2, a plurality of fixing blocks 14 are connected in the slot 13, the upper surfaces of the plurality of fixing blocks 14 are fixedly connected with pillow-shaped crystallization plates 15, the side walls of the plurality of pillow-shaped crystallization plates 15 are provided with a plurality of welding seams 16 and welding rings 17, the upper half of the side wall of the No. 1 crystallization tank body 2 is connected with a water inlet main pipe 18, a water inlet distribution pipe 19 is provided in the No. 1 crystallization tank body 2, the output end of the water inlet main pipe 18 is connected with the side wall of the water inlet distribution pipe 19, the side wall of the water inlet distribution pipe 19 is connected with a plurality of No. 2 water inlet pipes 20, and the output ends of the plurality of No. 2 water inlet pipes 20 are respectively connected with a plurality of The side walls of the pillow-shaped crystallization plates 15 are connected, and the bottoms of the side walls of the plurality of pillow-shaped crystallization plates 15 are connected with a No. 2 water outlet pipe 21. A water outlet collecting pipe 22 is provided in the No. 2 crystallization tank body 3. The side walls of the water outlet collecting pipe 22 are connected with the output ends of the plurality of No. 2 water outlet pipes 21. The side walls of the water outlet collecting pipe 22 are connected with a water outlet main pipe 23. The water outlet main pipe 23 runs through the side wall of the No. 1 crystallization tank body 2 and extends to the outside of the No. 1 crystallization tank body 2. The input end of the water inlet main pipe 18 and the output end of the water outlet main pipe 23 are both equipped with valves. The No. 1 water inlet pipe 9 and the No. 1 water outlet pipe 10 are respectively located on both sides of the water bath jacket 8. The sublimation tank body 1 is located in the water bath jacket 8. The air inlet The tube 11 is located on the side of the feed port 6, the air outlet pipe 12 is connected to the interior of the No. 2 crystallization tank body 3, and the two sealing doors 7 are located on the same side of the No. 1 crystallization tank body 2 and the No. 2 crystallization tank body 3. The sealing doors 7 on the side walls of the No. 1 crystallization tank body 2 and the No. 2 crystallization tank body 3 are convenient for collecting the crystallized products and maintaining and cleaning the equipment. Multiple pillow-shaped crystallization plates 15 are equidistantly arranged, and the pillow-shaped crystallization plates 15 are formed by welding and inflating two stainless steel plates. The water inlet distribution pipe 19 and the water outlet collecting pipe 22 are in a parallel position relationship, the water inlet distribution pipe 19 and the water inlet main pipe 18 are vertically arranged, and the water outlet collecting pipe 22 and the water outlet main pipe 23 are vertically arranged.

[0023] The working principle of the present invention is as follows: when in use, the material to be sublimated and crystallized is put into the sublimation tank body 1 through the feed port 6, and then the cover plate is closed to ensure that the feed port 6 is sealed. After that, the temperature of the subsequent water bath heating is determined according to the properties of the material and the process requirements, and the water bath heating component is started. Hot water is introduced into the water bath jacket 8 through the No. 1 water inlet pipe 9 to heat and sublimate the material in the sublimation tank body 1. The sublimated gaseous substance enters the No. 1 crystallization tank body 2 through the No. 1 ventilation pipe 4. At this time, part of the gaseous substance can be preliminarily crystallized here. In the No. 1 crystallization tank body 2, the card slot 13 is used to fix a plurality of pillow-shaped crystallization plates 15, and the pillow-shaped crystallization plates 15 are composed of two pieces of non- The stainless steel plates are welded and expanded, and the side walls are provided with a plurality of weld seams and welding rings. Before the sublimated gaseous substance enters the No. 1 crystallization tank body 2, the water inlet main pipe 18 needs to be connected to the external cold water supply system, and its output end is connected to the water inlet distribution pipe 19. After the cold water enters the water inlet distribution pipe 19 along the water inlet main pipe 18, the cold water is distributed to the inside of each pillow-shaped crystallization plate 15 through a plurality of No. 2 water inlet pipes 20. At this time, the water in the pillow-shaped crystallization plate 15 absorbs the heat of the sublimated gas. After the sublimated gas enters the No. 1 crystallization tank body 2 from the sublimation tank body 1 through the No. 1 ventilation pipe 4, it encounters the low-temperature pillow-shaped crystallization plate 15, and the gaseous substance cools and crystallizes on its surface. The design of the plate 15 increases the contact area between the device and the sublimation gas, and improves the crystallization efficiency. At the same time, by accurately controlling the water inlet temperature and flow rate, the crystallization temperature can be adjusted to make the crystallization process more stable and controllable, which is conducive to obtaining high-quality and high-purity crystallized products. After the cold water enters the pillow-shaped crystallization plate 15 through the No. 2 water inlet pipe 20, it will flow down from the top of the pillow-shaped crystallization plate 15 along the weld 16, and then flow into the water outlet collection pipe 22 through the No. 2 water outlet pipe 21, and then be discharged through the water outlet main pipe 23. In this way, efficient crystallization operation is achieved. After completing one crystallization, the sublimated gaseous substance entering the No. 1 crystallization tank body 2 will pass through the No. 2 channel The air pipe 5 enters the No. 2 crystallization tank body 3. The principle is similar to the above. The sublimated material is crystallized again through the No. 2 crystallization tank body 3, which is conducive to improving the efficiency of crystallization, so that the sublimated material can be extracted to a greater extent, which is more in line with the actual use requirements. At the same time, when performing sublimation crystallization, if the sublimation rate is not fast, the flow rate of the sublimated gaseous material is small, the gas flow rate can be increased by the decompression enhancement component, and inert gas is filled into the air inlet pipe 11. At the same time, an exhaust device is installed at the output end of the air outlet pipe 12. In this way, the circulation of gas inside the crystallizer is accelerated, thereby improving the crystallization rate and efficiency, which is more in line with the actual use requirements; While achieving more efficient crystallization operation, the two crystallization components can also improve the purity of the crystallized product, because after the target substance is sublimated, the gas formed not only has the target substance, but also has other components. When these substances enter the No. 1 crystallization tank body 2 together with the target substance, if the water temperature is low and the temperature at which the impurities can be condensed and sublimated is high, this will cause the impurities to crystallize together with the target substance and adhere to the pillow-shaped crystallization plate 15, thereby affecting the purity of the product. At this time, the purity of the crystallized product can be improved by cooperating with the two crystallization components. In view of the above situation, higher temperature water can be introduced into the No. 1 crystallization tank body 2 to crystallize the impurities or by-products first, and then the target product is crystallized through the No. 2 crystallization tank body 3. At this time, the gas reaching the No. 2 crystallization tank body 3 has a higher purity of internal components under the impurity removal effect of the No. 1 crystallization tank body 2. Crystallization operation is performed on the sublimated gas at this time to obtain a target substance with higher purity. In this way, a product with higher purity can be obtained, which is more in line with actual usage needs.

[0024] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pillow-type plate-type vacuum sublimation crystallizer, characterized in that: include: A sublimation tank body (1), wherein a first crystallization tank body (2) is arranged on the side of the sublimation tank body (1), and a second crystallization tank body (3) is arranged on the side of the first crystallization tank body (2); the upper surface of the sublimation tank body (1) is connected to a first ventilation pipe (4), and the output end of the first ventilation pipe (4) is connected to the interior of the first crystallization tank body (2); the bottom of the side wall of the first crystallization tank body (2) is connected to a second ventilation pipe (5), and the output end of the second ventilation pipe (5) is connected to the interior of the second crystallization tank body (3); a feed port (6) is arranged on the upper surface of the sublimation tank body (1), and a sealing cover plate is arranged at the input end of the feed port (6); and the side walls of the first crystallization tank body (2) and the second crystallization tank body (3) are both provided with sealing doors (7); A crystallization mechanism, the crystallization mechanism comprising a water bath heating component, a pressure reduction and synergistic component and two crystallization components, the two crystallization components being respectively located in a No. 1 crystallization tank body (2) and a No. 2 crystallization tank body (3).

2. A pillow-type plate-type vacuum sublimation crystallizer according to claim 1, characterized in that: The water bath heating assembly comprises a water bath jacket (8) sleeved on the sublimation tank body (1), the side wall of the water bath jacket (8) being connected to a first water inlet pipe (9), the side wall of the water bath jacket (8) being connected to a first water outlet pipe (10), and valves being installed at the input end of the first water inlet pipe (9) and the output end of the first water outlet pipe (10).

3. The pillow-type plate-type vacuum sublimation crystallizer according to claim 1, characterized in that: The decompression and synergistic component comprises an air inlet pipe (11) connected to the upper surface of the sublimation tank body (1), and the upper surface of the second crystallization tank body (3) is connected to an air outlet pipe (12), and the input end of the air inlet pipe (11) and the output end of the air outlet pipe (12) are both equipped with air valves.

4. The pillow-type plate-type vacuum sublimation crystallizer according to claim 1, characterized in that: The crystallization assembly comprises a slot (13) provided on the inner bottom surface of a first crystallization tank body (2), a plurality of fixed blocks (14) being clamped in the slot (13), a pillow-shaped crystallization plate (15) being fixedly connected to the upper surfaces of the plurality of fixed blocks (14), a plurality of weld seams (16) and weld rings (17) being provided on the side walls of the plurality of pillow-shaped crystallization plates (15), an upper half of the side wall of the first crystallization tank body (2) being connected to a water inlet main pipe (18), a water inlet distribution pipe (19) being provided in the first crystallization tank body (2), an output end of the water inlet main pipe (18) being connected to the side wall of the water inlet distribution pipe (19), and a plurality of second water inlet pipes (20) being connected to the side wall of the water inlet distribution pipe (19). The output ends of the plurality of No. 2 water inlet pipes (20) are respectively connected to the side walls of the plurality of pillow-shaped crystallization plates (15); the bottoms of the side walls of the plurality of pillow-shaped crystallization plates (15) are connected to the No. 2 water outlet pipes (21); a water outlet collecting pipe (22) is provided in the No. 2 crystallization tank body (3); the side wall of the water outlet collecting pipe (22) is connected to the output ends of the plurality of No. 2 water outlet pipes (21); the side wall of the water outlet collecting pipe (22) is connected to the water outlet main pipe (23); the water outlet main pipe (23) penetrates the side wall of the No. 1 crystallization tank body (2) and extends to the outside of the No. 1 crystallization tank body (2); the input end of the water inlet main pipe (18) and the output end of the water outlet main pipe (23) are both provided with valves.

5. The pillow-type plate-type vacuum sublimation crystallizer according to claim 1, characterized in that: The first crystallization tank body (2) and the second crystallization tank body (3) are both located on the same side of the sublimation tank body (1); the sublimation tank body (1) and the first crystallization tank body (2) are connected via a first ventilation pipe (4); and the first crystallization tank body (2) and the second crystallization tank body (3) are connected via a second ventilation pipe (5).

6. The pillow-type plate-type vacuum sublimation crystallizer according to claim 2, characterized in that: The No. 1 water inlet pipe (9) and the No. 1 water outlet pipe (10) are respectively located on both sides of the water bath jacket (8), and the sublimation tank body (1) is located inside the water bath jacket (8).

7. The pillow-type plate-type vacuum sublimation crystallizer according to claim 3, characterized in that: The air inlet pipe (11) is located on the side of the feed port (6), the air outlet pipe (12) is connected to the interior of the No. 2 crystallization tank body (3), and the two sealing doors (7) are located on the same side of the No. 1 crystallization tank body (2) and the No. 2 crystallization tank body (3).

8. The pillow-type plate-type vacuum sublimation crystallizer according to claim 4, characterized in that: The plurality of pillow-shaped crystallization plates (15) are arranged at equal distances from each other. The pillow-shaped crystallization plates (15) are formed by welding and expanding two stainless steel plates. The water inlet distribution pipe (19) and the water outlet collecting pipe (22) are arranged in parallel. The water inlet distribution pipe (19) and the water inlet main pipe (18) are arranged vertically. The water outlet collecting pipe (22) and the water outlet main pipe (23) are arranged vertically.

Images