Crystallizing tank for processing bismaleimide

Abstract

The utility model discloses a crystallizing tank for processing bismaleimide, and relates to the technical field of bismaleimide. The crystallization tank comprises a heat preservation top cover, a heat preservation tank, an air blower and a water storage tank, a crystallization tank main body is clamped and fixed in the heat preservation tank, a spiral heating plate is clamped and fixed on the peripheral surface of the crystallization tank main body, a supporting filter screen and a spraying frame are arranged at the bottom of the heat preservation top cover, and the air blower is arranged at the top of the peripheral surface of the heat preservation tank; and a water storage tank is arranged at the bottom of the peripheral surface of the heat preservation tank, and a liquid pump is connected to the bottom of the peripheral surface of the water storage tank in a penetrating and clamping mode. By arranging the heat preservation top cover, the heat preservation tank, the air blower and the water storage tank, the problems that a recrystallization device is complex, large in size and high in production cost, crystallized bismaleimide needs to be cleaned and dried through the device, and operation is inconvenient are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bismaleimide, in particular to a crystallization pot for bismaleimide processing. Background Art

[0002] Bismaleimide is another type of resin system derived from the polyimide resin system. It is a bifunctional compound with maleimide as the active end group. It has similar fluidity and moldability to epoxy resins and can be processed and molded by the same general methods as epoxy resins, overcoming the disadvantage of relatively low heat resistance of epoxy resins. Bismaleimide resins are widely used in aviation, aerospace, machinery, electronics and other fields due to their excellent heat resistance, electrical insulation, wave transmission, radiation resistance, flame retardancy, good mechanical properties and dimensional stability, and molding process similar to epoxy resin. In the production and processing of bismaleimide, it is necessary to crystallize the produced liquid so that bismaleimide crystallizes and precipitates in the mother liquor for the next step of processing. Crystallization is the process in which the solute in the hot saturated solution is cooled and the solute is supersaturated due to the decrease in solubility, so that the solute is precipitated in the form of crystals. Rapid cooling of the mother liquor by a crystallization tank can greatly improve the crystallization efficiency of bismaleimide, but it still has the following disadvantages in actual use:

[0003] 1. The utility model disclosed in the publication number CN215427405U discloses a bismaleimide continuous recrystallization device, wherein the recrystallization material is dissolved in the recrystallization liquid; a recrystallization kettle, which realizes recrystallization, is connected to the recrystallization liquid discharge port of the dissolving kettle through a solution transport pipe, and is provided with a recrystallization liquid discharge port and a recrystallization material discharge port; and a solvent buffer tank, which is connected to the recrystallization liquid discharge port of the recrystallization kettle through a solution transport pipe, collects the recrystallization liquid for temperature control and reprocessing, and returns the recrystallization liquid to the dissolving kettle through the solution transport pipe through the action of a metering pump. In order to improve the crystallization efficiency of bismaleimide and avoid that the mother liquor still contains a large amount of effective ingredients, it is usually necessary to use a crystallization device to recrystallize the bismaleimide, but the recrystallization device usually needs to be provided with multiple tanks to transport and process the bismaleimide and the mother liquor, and the structure is relatively complex and the volume is large, which greatly increases the production cost and maintenance expenses;

[0004] 2. During the crystallization process of bismaleimide through a crystallization tank, a certain amount of mother liquor usually remains on the surface of the bismaleimide after the crystallization process. Therefore, a treatment device needs to be set up to clean and dry the crystallized bismaleimide, which is inconvenient to operate. Utility Model Content

[0005] The utility model aims to provide a crystallization tank for processing bismaleimide. By means of a heat-insulating top cover, a heat-insulating tank, a blower and a water storage tank, the utility model solves the problem that when bismaleimide is crystallized, recrystallization is usually required to improve the crystallization efficiency, but the recrystallization device is relatively complex, large in size, and has a high production cost. In addition, the crystallized bismaleimide needs to be cleaned and dried by the device, which is inconvenient to operate.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a crystallization tank for bismaleimide processing, comprising a heat preservation top cover, a heat preservation tank, a blower and a water storage tank, wherein a crystallization tank body is clamped and fixed in the heat preservation tank, a spiral heating plate is clamped and fixed on the outer peripheral surface of the crystallization tank body, a lifting cylinder is clamped on the top of the heat preservation top cover, a supporting filter screen and a spray rack are arranged at the bottom of the heat preservation top cover, a blower is arranged on the top of the outer peripheral surface of the heat preservation tank, a first air inlet pipe is clamped and fixed on one side of the blower, a second air inlet pipe is penetrated and welded on the outer peripheral surface of the first air inlet pipe, a water storage tank is arranged on the bottom of the outer peripheral surface of the heat preservation tank, and a liquid pump is penetrated and clamped on the bottom of the outer peripheral surface of the water storage tank;

[0008] The main body of the crystallization tank can be heated by the spiral heating plate, and the mother liquor containing bismaleimide after the crystallization treatment is heated again, so as to facilitate the crystallization treatment of bismaleimide again. The lifting cylinder can drive the supporting filter to move up and down. After one crystallization treatment, the supporting filter drives the bismaleimide particles to separate from the mother liquor. At the same time, the condensed water is sprayed on the surface of the bismaleimide particles through the spray rack to clean the bismaleimide particles. At the same time, the spiral heating plate heats the mother liquor again, so as to accurately perform the next crystallization treatment and improve the production efficiency. The blower can drive the flow of air. When the crystallization treatment is carried out, the air is blown into the heat preservation tank through the second air inlet pipe, and the spiral heating plate is used to heat the mother liquor again. The rotary heating plate can increase the heat conduction area of ​​the crystallizer body, and the flowing air quickly cools the crystallizer body and the mother liquor containing bismaleimide, and performs crystallization treatment on the bismaleimide. When the bismaleimide particles are discharged, the blower blows air into the crystallizer body through the first air inlet pipe to air-cool and dry the bismaleimide particles. At the same time, the air containing moisture is condensed through the condenser and stored in the water storage tank, which is convenient for cleaning the bismaleimide particles again. The crystallizer has a simple structure and occupies a small volume. It can recrystallize the mother liquor and complete the cleaning and drying of the bismaleimide particles at the same time, which greatly improves the convenience of using the crystallizer.

[0009] Further, a hopper is welded through the top of the insulation top cover, a sealing cover is provided at the bottom of the insulation top cover, the bottom of the hopper is connected to the top of the sealing cover, a connecting pipe is connected to the top of the sealing cover, the spray rack is connected to the bottom of the connecting pipe, the spray rack is located between the support filter and the sealing cover, and the sealing cover is connected to the top of the crystallization tank body;

[0010] After the bismaleimide particles are crystallized, the water in the water tank can be sprayed on the surface of the bismaleimide particles through the spray rack to clean them. At the same time, the main body of the crystallizer can heat the mother liquor again through the spiral heating plate to accurately prepare for the next crystallization process, thereby improving the convenience of using the crystallizer.

[0011] Furthermore, a telescopic tube is slidably connected to the bottom of the lifting cylinder, the supporting filter is connected to the bottom of the telescopic tube, a scraper is welded and fixed to the top edge of the supporting filter, the telescopic tube is inserted through the insulation top cover and the top of the sealing cover, and the supporting filter and the scraper are attached to the inner wall of the crystallization tank body;

[0012] The lifting cylinder can drive the supporting filter screen and the scraper to move up and down to discharge the bismaleimide particles after crystallization treatment. At the same time, the scraper can scrape off the bismaleimide particles attached to the inner wall of the crystallization tank body, thereby improving the discharge efficiency.

[0013] Furthermore, a discharge pipe is welded through the top of the outer peripheral surface of the crystallizer body, a liquid discharge pipe is welded through the center of the bottom of the crystallizer body, a support frame is fixedly connected to the bottom of the insulation tank, a first exhaust pipe is welded through the bottom of the insulation tank, the discharge pipe is connected to the outer peripheral surface of the insulation tank, the liquid discharge pipe is connected to the bottom of the crystallizer body, and the spiral heating plate is attached to the inner wall of the insulation tank;

[0014] During the crystallization treatment, the heat conduction area of ​​the crystallization tank body can be increased by the spiral heating plate, and the blower drives the flowing air to quickly cool down the crystallization tank body and the mother liquor containing bismaleimide, thereby improving the crystallization efficiency of bismaleimide. After a crystallization treatment is completed, the crystallization tank body can be heated by the spiral heating plate to facilitate the recrystallization of the mother liquor. There is no need to transfer the mother liquor, which reduces costs and reduces the probability of clogging of the crystallization tank.

[0015] Furthermore, the first air inlet pipe is penetrated and clamped with a first solenoid valve on its outer circumference, the second air inlet pipe is penetrated and clamped with a second solenoid valve on its outer circumference, the first air inlet pipe is penetrated and clamped with the outer circumferences of the insulation tank and the crystallization tank body, and the second air inlet pipe is penetrated and clamped with the outer circumference of the insulation tank;

[0016] When performing crystallization treatment, the first air inlet pipe is closed and the second air inlet pipe is opened, so that the blower blows cold air into the insulation tank, and the heated air is discharged through the first exhaust pipe to cool the crystallization tank body and the mother liquor. When discharging the bismaleimide particles, the second air inlet pipe is closed and the first air inlet pipe is opened. The air passes through the surface of the bismaleimide particles and the supporting filter, driving the heated and evaporated air into the water storage tank, drying the bismaleimide particles, and improving the convenience of using the crystallization tank.

[0017] Furthermore, a condenser is welded through the top of the water storage tank, the top of the condenser is clamped and connected to the outer peripheral surface of the insulation tank and the crystallization tank body, the outer peripheral surface of the condenser is clamped and connected to the third solenoid valve, the outer peripheral surface of the condenser is welded and fixed with a heat dissipation fin, the bottom of the outer peripheral surface of the condenser is welded and connected to the second exhaust pipe, the heat dissipation fin is located between the third solenoid valve and the second exhaust pipe, the top of the liquid pump is clamped and connected to a hose, and the other end of the hose is clamped and connected to the top of the connecting pipe;

[0018] The hot air entering the condenser tube is quickly cooled down, and the moisture in the air is condensed and stored in the water tank. When the bismaleimide particles treated by crystallization are discharged for the second time, the condensed water in the water tank is pumped to the spray rack through a liquid pump to clean the bismaleimide particles, thereby improving the convenience of using the crystallization tank.

[0019] The utility model has the following beneficial effects:

[0020] 1. The utility model solves the problem that a crystallization device needs to recrystallize bismaleimide by arranging a heat-insulating top cover and a heat-insulating tank. However, a recrystallization device usually needs to be provided with multiple tanks to transport and process bismaleimide and mother liquor, which has a relatively complex structure and a large volume, greatly increasing the problem of production cost and maintenance expenses. When performing crystallization, the spiral heating plate increases the heat conduction area of ​​the main body of the crystallization tank, and the blower drives the cold air to move along the spiral heating plate, quickly cooling the main body of the crystallization tank and the mother liquor containing bismaleimide, and performing crystallization on the bismaleimide. After one crystallization, the lifting cylinder drives the supporting filter to move upward, so that the bismaleimide particles are separated from the mother liquor. The spiral heating plate heats the mother liquor while the bismaleimide particles are discharged, so that the next crystallization can be performed accurately without transferring the mother liquor, thereby reducing the cost and the probability of clogging of the crystallization tank.

[0021] 2. The utility model solves the problem that during the crystallization process of bismaleimide through a crystallization tank, a certain amount of mother liquor usually remains on the surface of the bismaleimide after the crystallization treatment, and thus a processing device needs to be provided to clean and dry the crystallized bismaleimide, which is inconvenient to operate. When the bismaleimide particles are discharged, the liquid pump pumps the condensed water in the water storage tank into the spray rack and sprays it on the surface of the bismaleimide particles to clean the bismaleimide particles. After cleaning, the bismaleimide particles are air-cooled and dried by the flow of air driven by the blower. At the same time, the insulation tank heats the mother liquor for the next crystallization treatment, so that the crystallization tank can clean and dry the bismaleimide particles without affecting the next crystallization treatment, thereby greatly improving the convenience of using the crystallization tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a structural effect diagram of the utility model;

[0024] Figure 3 This is a structural diagram of the thermal insulation top cover and the supporting filter screen of the utility model;

[0025] Figure 4 It is a structural diagram of the main body of the heat preservation tank and the crystallization tank of the utility model;

[0026] Figure 5 This is a structural diagram of the blower of the utility model;

[0027] Figure 6 It is a structural diagram of the water storage tank of the utility model.

[0028] Reference numerals:

[0029] 1. Insulation top cover; 101. Sealing cover; 102. Lifting cylinder; 103. Hopper; 104. Telescopic tube; 105. Support filter; 106. Scraper; 107. Spray rack; 108. Connecting pipe; 2. Insulation tank; 201. Crystallization tank body; 202. Support rack; 203. First exhaust pipe; 204. Discharge pipe; 205. Spiral heating plate; 206. Drain pipe; 3. Blower; 301. First air inlet pipe; 302. First solenoid valve; 303. Second air inlet pipe; 304. Second solenoid valve; 4. Water storage tank; 401. Condenser; 402. Liquid pump; 403. Third solenoid valve; 404. Second exhaust pipe; 405. Hose; 406. Heat dissipation fins. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] See also Figure 1-6 As shown, the utility model is a crystallization tank for bismaleimide processing, comprising a heat preservation top cover 1, a heat preservation tank 2, a blower 3 and a water storage tank 4, a crystallization tank body 201 is fixedly connected in the heat preservation tank 2, a spiral heating plate 205 is fixedly connected to the outer peripheral surface of the crystallization tank body 201, a lifting cylinder 102 is fixedly connected to the top of the heat preservation top cover 1, a supporting filter screen 105 and a spray rack 107 are arranged at the bottom of the heat preservation top cover 1, a blower 3 is arranged at the top of the outer peripheral surface of the heat preservation tank 2, a first air inlet pipe 301 is fixedly connected to one side of the blower 3, a second air inlet pipe 303 is welded through the outer peripheral surface of the first air inlet pipe 301, a water storage tank 4 is arranged at the bottom of the outer peripheral surface of the heat preservation tank 2, and a liquid pump 402 is connected to the bottom of the outer peripheral surface of the water storage tank 4;

[0032] The mother liquor containing bismaleimide is poured into the main body of the crystallizer 201, the first air inlet pipe 301 is closed and the second air inlet pipe 303 is opened, the blower 3 is started to draw cold air into the heat preservation tank 2 through the second air inlet pipe 303, the cold air moves along the spiral heating plate 205 and cools the main body of the crystallizer 201 and the mother liquor containing bismaleimide, so that the bismaleimide crystals are precipitated, and after a certain period of time, the lifting cylinder 102 is controlled to drive the supporting filter screen 105 to move upward, so that the precipitated bismaleimide particles are separated from the mother liquor, and at the same time, the second air inlet pipe 303 is closed and the first air inlet pipe 301 is opened, and the spiral heating plate 205 is turned on to heat the crystallizer 201. The tank body 201 and the mother liquor are heated, and the liquid pump 402 pumps the condensed water in the water storage tank 4 into the spray rack 107 and sprays it on the surface of the bismaleimide particles to clean the bismaleimide particles. After the bismaleimide particles are cleaned, the blower 3 is started to pump air into the crystallization tank body 201, so that the air passes through the surface of the bismaleimide particles and the supporting filter 105, and the bismaleimide particles are air-cooled and dried while the air drives the evaporated water to enter the condenser 401 for condensation. After the drying treatment of the bismaleimide particles is completed, the discharge pipe 204 is opened and the bismaleimide particles are discharged by the flow of air.

[0033] Among them Figure 1-3As shown, a hopper 103 is welded through the top of the insulation top cover 1, a sealing cover 101 is arranged at the bottom of the insulation top cover 1, the bottom of the hopper 103 is penetrated and connected to the top of the sealing cover 101, the top of the sealing cover 101 is penetrated and connected with a connecting pipe 108, a spray rack 107 is penetrated and connected to the bottom of the connecting pipe 108, the spray rack 107 is located between the support filter 105 and the sealing cover 101, the sealing cover 101 is connected to the top of the crystallization tank body 201, the bottom of the lifting cylinder 102 is slidably connected with a telescopic tube 104, the support filter 105 is connected to the bottom of the telescopic tube 104, the top edge of the support filter 105 is welded and fixed with a scraper 106, the telescopic tube 104 is penetrated and plugged into the insulation top cover 1 and the top of the sealing cover 101, and the support filter 105 and the scraper 106 are attached to the inner wall of the crystallization tank body 201;

[0034] After the bismaleimide particles are crystallized, the lifting cylinder 102 drives the supporting filter 105 and the scraper 106 to move upward, and the crystals precipitated on the inner wall of the crystallization tank body 201 are scraped off to the surface of the supporting filter 105, and the supporting filter 105 and the bismaleimide particles are separated from the mother liquor. The water in the water storage tank 4 is sprayed on the surface of the bismaleimide particles through the spray rack 107 to clean them. At the same time, the crystallization tank body 201 heats the mother liquor again through the spiral heating plate 205 to accurately prepare for the next crystallization treatment.

[0035] Among them Figure 1 , 2 As shown in , 4 and 5, a discharge pipe 204 is welded through the top of the outer peripheral surface of the crystallizer body 201, a drain pipe 206 is welded through the center of the bottom of the crystallizer body 201, a support frame 202 is fixedly connected to the bottom of the insulation tank 2, a first exhaust pipe 203 is welded through the bottom of the insulation tank 2, the discharge pipe 204 is connected through the insulation tank 2, the drain pipe 206 is connected through the bottom of the crystallizer body 201, the spiral heating plate 205 is attached to the inner wall of the insulation tank 2, the first air inlet pipe 301 is connected through the outer peripheral surface of the first electromagnetic valve 302, the second air inlet pipe 303 is connected through the outer peripheral surface of the second electromagnetic valve 304, the first air inlet pipe 301 is connected through the insulation tank 2 and the outer peripheral surface of the crystallizer body 201, and the second air inlet pipe 303 is connected through the outer peripheral surface of the insulation tank 2;

[0036] When performing crystallization treatment, close the first solenoid valve 302 and open the second solenoid valve 304, start the blower 3 to draw cold air into the insulation tank 2 through the second air inlet pipe 303, the cold air moves along the spiral heating plate 205 and cools the crystallization tank body 201 and the mother liquor containing bismaleimide, so that the bismaleimide is crystallized and precipitated. After the first crystallization treatment is completed, when the bismaleimide particles are discharged, close the second solenoid valve 304 and open the first solenoid valve 302, the air enters the crystallization tank body 201 through the first air inlet pipe 301, and passes through the surface of the bismaleimide particles and the supporting filter 105, driving the heated and evaporated air into the water storage tank 4, and the bismaleimide particles are dried. At the same time, the spiral heating plate 205 heats the crystallization tank body 201, and further heats the mother liquor.

[0037] Among them Figure 1 , 2 As shown in , 6, a condenser 401 is welded through the top of the water storage tank 4, the top of the condenser 401 is connected to the outer peripheral surface of the insulation tank 2 and the crystallization tank body 201, the outer peripheral surface of the condenser 401 is connected to the third solenoid valve 403, the outer peripheral surface of the condenser 401 is welded and fixed with a heat dissipation fin 406, the bottom of the outer peripheral surface of the condenser 401 is welded through the second exhaust pipe 404, the heat dissipation fin 406 is located between the third solenoid valve 403 and the second exhaust pipe 404, the top of the liquid pump 402 is connected to the hose 405, and the other end of the hose 405 is connected to the top of the connecting pipe 108;

[0038] The hot air entering the condenser 401 is quickly cooled down, and the moisture in the air is condensed and stored in the water tank 4. The cold air is discharged through the second exhaust pipe 404. When the crystallized bismaleimide particles are discharged for the second time, the condensed water in the water tank 4 is pumped to the spray rack 107 through the liquid pump 402 to clean the bismaleimide particles.

[0039] The specific working principle of the utility model is as follows: a mother liquor containing bismaleimide is poured into the hopper 103, the mother liquor containing bismaleimide falls into the crystallization tank body 201 under the action of gravity, the first solenoid valve 302 is closed and the second solenoid valve 304 is opened, the blower 3 is started to draw cold air into the insulation tank 2 through the second air inlet pipe 303, the cold air moves along the spiral heating plate 205 and is discharged through the first exhaust pipe 203, and the crystallization tank body 201 and the mother liquor containing bismaleimide fall ... mother liquor containing bismaleimide falls into the crystallization tank body 201 under the action of gravity, the mother liquor containing bismaleimide falls into the crystallization tank body 201 under the action of gravity, the mother liquor containing bismaleimide falls into the crystallization tank body 201 under the action of gravity, the mother liquor containing bismaleimide falls into The mother liquor containing bismaleimide is cooled to make bismaleimide crystallize. After a certain period of crystallization treatment, the lifting cylinder 102 drives the support filter 105 and the scraper 106 to move upward, scraping the crystals precipitated on the inner wall of the crystallization tank body 201 onto the surface of the support filter 105, and separating the support filter 105 and the bismaleimide particles from the mother liquor. The liquid pump 402 pumps the condensed water in the water storage tank 4 to the spray rack 107 to clean the bismaleimide particles. Wash, and at the same time, open the spiral heating plate 205 to heat the crystallizer body 201 and the mother liquor, close the second solenoid valve 304 and open the first solenoid valve 302, and at the same time open the third solenoid valve 403, the blower 3 drives the air to enter the crystallizer body 201 through the first air inlet pipe 301, and through the surface of the bismaleimide particles and the supporting filter 105, the bismaleimide particles are dried, and at the same time, the heated and evaporated air is driven into the condenser 401, the hot air is quickly cooled, and the moisture in the air is condensed and stored in the water storage tank 4, and the cold air is discharged through the second exhaust pipe 404. After the drying process is completed, open the discharge pipe 204 and close the third solenoid valve 403, and the bismaleimide particles are discharged through the discharge pipe 204 by the flow of air, and the discharge pipe 204 is closed to crystallize the heated mother liquor again, and after multiple crystallization processes, the drain pipe 206 is opened to pour out the residual mother liquor.

[0040] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A crystallization tank for bismaleimide processing, comprising a heat-insulating top cover (1), a heat-insulating tank (2), a blower (3) and a water storage tank (4), characterized in that: A crystallization tank body (201) is clamped and fixed inside the heat preservation tank (2), a spiral heating plate (205) is clamped and fixed on the outer peripheral surface of the crystallization tank body (201), a lifting cylinder (102) is clamped on the top of the heat preservation top cover (1), a supporting filter (105) and a spray rack (107) are arranged at the bottom of the heat preservation top cover (1), a blower (3) is arranged at the top of the outer peripheral surface of the heat preservation tank (2), a first air intake pipe (301) is clamped and fixed on one side of the blower (3), a second air intake pipe (303) is penetrated and welded on the outer peripheral surface of the first air intake pipe (301), a water storage tank (4) is arranged at the bottom of the outer peripheral surface of the heat preservation tank (2), and a liquid pump (402) is clamped and connected to the bottom of the outer peripheral surface of the water storage tank (4).

2. A crystallization tank for bismaleimide processing according to claim 1, characterized in that: A hopper (103) is welded through the top of the thermal insulation top cover (1), a sealing cover (101) is arranged at the bottom of the thermal insulation top cover (1), the bottom of the hopper (103) is penetrated and clamped on the top of the sealing cover (101), a connecting pipe (108) is penetrated and clamped on the top of the sealing cover (101), the spray rack (107) is penetrated and clamped on the bottom of the connecting pipe (108), the spray rack (107) is located between the supporting filter screen (105) and the sealing cover (101), and the sealing cover (101) is clamped on the top of the crystallization tank body (201).

3. A crystallization tank for bismaleimide processing according to claim 1, characterized in that: The bottom of the lifting cylinder (102) is slidably connected with a telescopic tube (104), the supporting filter (105) is connected to the bottom of the telescopic tube (104), the top edge of the supporting filter (105) is welded and fixed with a scraper (106), the telescopic tube (104) penetrates and is plugged into the top of the insulation top cover (1) and the sealing cover (101), and the supporting filter (105) and the scraper (106) are attached to the inner wall of the crystallization tank body (201).

4. A crystallization tank for bismaleimide processing according to claim 1, characterized in that: A discharge pipe (204) is welded through the top of the outer peripheral surface of the crystallizer body (201), a drainage pipe (206) is welded through the center of the bottom of the crystallizer body (201), a support frame (202) is clamped and fixed to the bottom of the insulation tank (2), a first exhaust pipe (203) is welded through the bottom of the insulation tank (2), the discharge pipe (204) is clamped and connected to the outer peripheral surface of the insulation tank (2), the drainage pipe (206) is clamped and connected to the bottom of the crystallizer body (201), and the spiral heating plate (205) is attached to the inner wall of the insulation tank (2).

5. A crystallization tank for bismaleimide processing according to claim 1, characterized in that: The first air inlet pipe (301) is penetrated and clamped with a first solenoid valve (302) on its outer circumference, the second air inlet pipe (303) is penetrated and clamped with a second solenoid valve (304) on its outer circumference, the first air inlet pipe (301) is penetrated and clamped with the outer circumferences of the heat preservation tank (2) and the crystallization tank body (201), and the second air inlet pipe (303) is penetrated and clamped with the outer circumference of the heat preservation tank (2).

6. A crystallization tank for bismaleimide processing according to claim 2, characterized in that: A condenser (401) is welded through the top of the water storage tank (4), and the top of the condenser (401) is clamped on the outer peripheral surface of the heat preservation tank (2) and the crystallization tank body (201). A third solenoid valve (403) is clamped through the outer peripheral surface of the condenser (401). A heat dissipation fin (406) is welded and fixed to the outer peripheral surface of the condenser (401). A second exhaust pipe (404) is welded through the bottom of the outer peripheral surface of the condenser (401), and the heat dissipation fin (406) is located between the third solenoid valve (403) and the second exhaust pipe (404). A hose (405) is clamped through the top of the liquid pump (402), and the other end of the hose (405) is clamped on the top of the connecting pipe (108).

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