Polysulfone resin production equipment

Abstract

The invention discloses polysulfone resin production equipment, and relates to the technical field of polysulfone resin production. The polysulfone resin production equipment comprises a precipitation drying kettle, a spraying device, a steam input device, a heating device and a solvent collecting device, wherein a first mounting port is formed in the top of the precipitation drying kettle, a second mounting port is formed in one side of the upper part of the precipitation drying kettle, an exhaust port is formed in the other side of the upper part of the precipitation drying kettle, and a discharge port is formed in the bottom of the precipitation drying kettle; the spraying device is mounted at the first mounting opening; the steam input device is mounted at the second mounting opening; the heating device is arranged on the precipitation drying kettle; the solvent collecting device comprises a flash tank and a cooling device arranged on the flash tank, the flash tank is connected with the exhaust port through a first exhaust pipe, and an air outlet is formed in the upper portion of the flash tank. According to the technical scheme provided by the invention, the production efficiency of the polysulfone resin can be improved, and the purity of the prepared polysulfone resin can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of polysulfone resin production, in particular to polysulfone resin production equipment. Background Art

[0002] Bisphenol A polysulfone resin has many excellent properties such as high molecular stability, transparency, hydrolysis stability, chemical resistance, and biocompatibility. It can be widely used in aerospace, electronics, medical equipment, and automotive parts.

[0003] Bisphenol A type polysulfone resin uses bisphenol A and 4,4'-dichlorodiphenyl sulfone as raw materials, forms a viscous solution through polycondensation reaction, mixes the viscous solution with a precipitant (such as water, methanol, or ethanol) to precipitate the polysulfone resin, and then grinds the precipitated polysulfone resin solid, washes and dries it to obtain the polysulfone resin. The existing polysulfone resin has low production efficiency and the purity of the obtained polysulfone resin is low. Summary of the invention

[0004] The main purpose of the invention is to provide a polysulfone resin production device, aiming to solve the problems of low production efficiency of the existing polysulfone resin and low purity of the prepared polysulfone resin.

[0005] To achieve the above object, the polysulfone resin production equipment proposed by the present invention comprises:

[0006] The coagulation and drying kettle has a first installation opening on the top, a second installation opening on one side of the upper part of the coagulation and drying kettle, an exhaust port on the other side of the upper part, and a discharge port on the bottom;

[0007] A spray device, installed at the first installation port;

[0008] A steam input device is installed at the second installation port;

[0009] A heating device is arranged on the coagulation and drying kettle; and

[0010] The solvent collecting device comprises a flash tank and a cooling device arranged on the flash tank, wherein the flash tank is connected to the exhaust port through a first exhaust pipe, an air outlet is arranged at the top of the flash tank, and a liquid discharge port is arranged at the bottom.

[0011] In one embodiment, the spray device comprises:

[0012] A nozzle, mounted on the first mounting port, and the nozzle has a nozzle hole with an aperture of 0.5 to 2.0 mm;

[0013] A feed pipe connected to the nozzle; and

[0014] The first pressure pump is arranged on the feed pipe.

[0015] In one embodiment, the steam input device comprises:

[0016] A steam distributor is installed at the second installation port.

[0017] an air inlet pipe connected to the air inlet end of the steam distributor; and

[0018] A steam controller is arranged on the air inlet pipe.

[0019] In one embodiment, the polysulfone resin production equipment further comprises a reflux pipe, one end of which is connected to the gas outlet, and the other end of which is connected to the steam controller, and a second pressure pump is provided on the reflux pipe.

[0020] In one embodiment, the polysulfone resin production equipment further includes a condenser connected to the exhaust port via a second exhaust pipe, a condensation water tank connected to the condenser, and a vacuum device connected to the condensation water tank.

[0021] In one embodiment, the heating device comprises a first jacket disposed on the outer wall of the coagulation and drying kettle, wherein a steam inlet is disposed on one side of the first jacket and a steam outlet is disposed on the other side thereof.

[0022] In one embodiment, the cooling device comprises a second jacket disposed on the outer wall of the flash tank, wherein a cooling water inlet is disposed on one side of the second jacket and a cooling water outlet is disposed on the other side thereof.

[0023] In one embodiment, the polysulfone resin production equipment further comprises:

[0024] A reaction kettle for generating a polysulfone resin solution; and

[0025] A filter, used for solid-liquid separation of the polysulfone resin solution generated in the reactor;

[0026] Wherein, the spray device is used to spray the liquid after solid-liquid separation into the precipitation drying kettle in the form of mist.

[0027] In one embodiment, in the direction from feed to liquid outlet, the filter includes a first filter membrane with a pore size of 30-50 μm, a second filter membrane with a pore size of 10-20 μm, and a third filter membrane with a pore size of 3-8 μm, which are arranged in sequence.

[0028] In one embodiment, a stirring device is provided at the lower part of the coagulation and drying kettle.

[0029] In the technical scheme of the present invention, the raw materials for preparing polysulfone resin undergo polycondensation reaction in the reactor to form a polysulfone resin viscous liquid, which is diluted to form a polysulfone resin solution; the filter performs solid-liquid separation on the polysulfone resin solution to remove byproducts such as solid salts in the polysulfone resin solution, which helps to improve the purity of the obtained polysulfone resin product. The steam input device inputs high-pressure water vapor into the precipitation drying kettle, so that the temperature in the precipitation drying kettle is maintained at 160-180°C, which is higher than the boiling point of the solvent in the raw materials for preparing polysulfone resin. The spray device sprays the filtered polysulfone resin solution into the precipitation drying kettle in the form of mist, and the mist liquid entering the precipitation drying kettle contacts with the high-pressure steam. Since the temperature in the precipitation drying kettle is higher than the boiling point of the solvent in the raw materials for preparing polysulfone resin, the solvent in the mist liquid can be quickly vaporized to form solvent gas. After the solvent in the mist liquid is removed, the polysulfone resin can be solidified and precipitated and sink to the bottom of the precipitation drying kettle. The contact between the mist liquid and the high-pressure steam can ensure that the particle size of the precipitated polysulfone resin particles is small, avoiding the steps of crushing and washing, improving the production efficiency, and effectively removing by-products such as solid salts and solvents, thereby improving the purity of the final product.

[0030] After the polysulfone resin is precipitated, the heating device can directly dry the precipitated polysulfone resin particles. Since the precipitation and drying of the polysulfone resin particles are completed in the precipitation drying kettle, there is no need to set up a separate drying device, which avoids the transfer of materials, and there is no need for crushing and washing steps before drying, which simplifies the production process, further improves the production efficiency of the polysulfone resin, and saves water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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 description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 A schematic structural diagram of an embodiment of a polysulfone resin production device provided by the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the connection structure between the feed pipe and the filter.

[0034] Description of Figure Numbers:

[0035] 100. Polysulfone resin production equipment; 1. precipitation drying kettle; 11. first installation port; 12. second installation port; 13. exhaust port; 131. filter screen; 132. first exhaust pipe; 132a. first valve; 133. second exhaust pipe; 133a. second valve; 14. discharge port; 21. feed pipe; 22. first pressure pump; 23. third valve; 24. nozzle; 25. reactor; 26. filter; 261. first filter membrane; 262. second filter membrane; 263. third filter membrane Filter membrane; 27, liquid collecting box; 31, air inlet pipe; 32, steam controller; 33, fourth valve; 34, steam distributor; 41, flash tank; 411, air outlet; 412, liquid discharge port; 42, reflux pipe; 43, second booster pump; 51, first jacket; 511, steam inlet; 512, steam outlet; 52, stirring shaft; 521, stirring blade; 6, second jacket; 61, cooling water inlet; 62, cooling water outlet; 71, condenser; 72, condensate tank; 73, vacuum device.

[0036] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] Bisphenol A type polysulfone resin uses bisphenol A and 4,4'-dichlorodiphenyl sulfone as raw materials, forms a viscous solution through polycondensation reaction, mixes the viscous solution with a precipitant (such as water, methanol, or ethanol) to precipitate the polysulfone resin, and then grinds the precipitated polysulfone resin solid, washes and dries it to obtain the polysulfone resin. The existing polysulfone resin has low production efficiency and the purity of the obtained polysulfone resin is low.

[0041] In view of this, the present invention provides a polysulfone resin production device to solve the problems of low production efficiency of the existing polysulfone resin and low purity of the prepared polysulfone resin.

[0042] See also Figure 1 and Figure 2 In one embodiment of the present invention, the polysulfone resin production equipment 100 includes a reactor 25, a filter 26, a precipitation drying reactor 1, a spray device, a steam input device, a heating device, and a solvent collecting device. The reactor 25 is used to generate a polysulfone resin solution; the filter 26 is used to separate the polysulfone resin solution generated in the reactor 25 into solid and liquid; the top of the precipitation drying reactor 1 is provided with a first installation port 11, one side of the upper part of the precipitation drying reactor 1 is provided with a second installation port 12, and the other side of the upper part of the precipitation drying reactor 1 is provided with a second installation port 13. An exhaust port 13 is provided, and a discharge port 14 is provided at the bottom of the coagulation and drying kettle 1; the spray device is installed at the first installation port 11; the steam input device is installed at the second installation port 12; the heating device is arranged on the coagulation and drying kettle 1; the solvent collecting device includes a flash tank 41 and a cooling device arranged on the flash tank 41, the flash tank 41 is connected to the exhaust port 13 through a first exhaust pipe 132, and the flash tank 41 is provided with an air outlet 411 at the top and a liquid discharge port 412 at the bottom.

[0043] In the technical solution of the present invention, the raw materials for preparing bisphenol A type polysulfone resin (4,4'-dichlorodiphenyl sulfone, bisphenol A, anhydrous potassium carbonate, dimethyl sulfoxide, and toluene in a molar ratio of 1:1:1.3:7:1.4) are put into a reactor 25, and a viscous solution is formed through a polycondensation reaction. An organic solvent is injected into the reactor 25 to dilute the viscous solution after the reaction to form a polysulfone resin solution. The organic solvent used to dilute the viscous solution is the same as the organic solvent (dimethyl sulfoxide) in the raw materials for preparing bisphenol A type polysulfone resin, and during dilution, the amount of the organic solvent used is 0.5 to 3.0 wt% of the viscous solution.

[0044] The filter 26 performs solid-liquid separation on the polysulfone resin solution to remove byproducts such as solid salts in the polysulfone resin solution, which helps to improve the purity of the obtained polysulfone resin product. After the polysulfone resin solution is filtered through the filter 26, a filtered polysulfone resin solution is obtained. It can be understood that the filtered polysulfone resin solution contains almost no byproducts such as salts.

[0045] The steam input device sprays water vapor into the coagulation drying kettle 1 at a pressure of 0.5-1.0 MPa, and the water vapor fills the coagulation drying kettle 1, so that the temperature in the coagulation drying kettle 1 is maintained at 160-180°C, which is higher than the boiling point of the solvent in the raw material for preparing the polysulfone resin.

[0046] The spray device sprays the filtered polysulfone resin solution into the precipitation drying kettle 1 in the form of mist, and the mist liquid entering the precipitation drying kettle 1 contacts with high-pressure steam. Since the temperature in the precipitation drying kettle 1 is higher than the boiling point of the solvent in the preparation raw material of the polysulfone resin, the solvent in the mist liquid can be quickly vaporized to form a solvent gas. After the solvent in the mist liquid is removed, the polysulfone resin can be solidified and precipitated and sink to the bottom of the precipitation drying kettle 1 to achieve the purpose of separating the polysulfone resin from the solvent. And the mist liquid contacts with high-pressure steam, which can ensure that the particle size of the precipitated polysulfone resin particles is smaller, avoids the steps of crushing and washing, and improves production efficiency. In addition, the solidified precipitated polysulfone resin particles sink to the bottom of the precipitation drying kettle 1. After the precipitation of the polysulfone resin is completed, the heating device is started, and the sinking polysulfone resin particles are directly dried. Since the precipitation and drying of the polysulfone resin particles are completed in the precipitation drying kettle 1, there is no need to set up a drying device separately, which avoids the transfer of materials, simplifies the production process, and further improves the production efficiency of the polysulfone resin.

[0047] The polysulfone resin particles after drying can be discharged from the discharge port 14. It can be understood that the discharge port 14 is opened at the bottom of the precipitation drying kettle 1, and a valve is provided on the discharge port 14. Under normal circumstances, the valve is in a closed state. When the polysulfone resin particles need to be discharged, the valve is opened, so that the polysulfone resin product is easily collected.

[0048] During the solidification and precipitation of the polysulfone resin, the high-pressure steam and solvent gas in the precipitation drying kettle 1 are discharged through the first exhaust pipe 132. The water vapor and solvent gas discharged from the first exhaust pipe 132 enter the flash tank 41, and a cooling device is provided on the flash tank 41 to cool the water vapor and solvent gas in the tank. Since the boiling point of the solvent is higher than that of water, the solvent gas is condensed and liquefied quickly to form a liquid when it is cooled, and falls to the bottom of the flash tank 41, while most of the water vapor and a very small part of the solvent gas are discharged from the gas outlet 411. The liquid solvent falling to the bottom of the flash tank 41 can be discharged through the drain port 412 for the treatment of the solvent. It is understandable that a valve is provided on the drain port 412, and the valve is in a closed state under normal conditions, and when the liquid solvent in the tank needs to be discharged, the valve is in an open state.

[0049] Specifically, the polysulfone resin production equipment 100 further includes a second exhaust pipe 133 connected to the exhaust port 13. After the polysulfone resin is solidified and precipitated, when the polysulfone resin particles are dried, water vapor generated during the drying process is discharged through the second exhaust pipe 133.

[0050] It should be noted that a first valve 132a is provided on the first exhaust pipe 132, and a second valve 133a is provided on the second exhaust pipe 133. During the solidification and precipitation process of the polysulfone resin, the first valve 132a is in an open state and the second valve 133a is in a closed state; when the polysulfone resin particles are dried, the first valve 132a is in a closed state and the second valve 133a is in an open state.

[0051] In order to allow the filtered polysulfone resin solution to be better sprayed into the coagulation and drying kettle 1 in a mist form, the spray device includes a nozzle 24, a feed pipe 21, and a first pressure pump 22. The nozzle 24 is installed on the first installation port 11, and the nozzle 24 has a plurality of spray holes, and the aperture of the spray holes is 0.5 to 2.0 mm; the feed pipe 21 is connected to the nozzle 24; the first pressure pump 22 is arranged on the feed pipe 21.

[0052] By adopting the above technical solution, the first pressure pump 22 pressurizes the filtered polysulfone resin solution, so that the polysulfone resin solution is sprayed out through the spray hole at a pressure of 0.15-0.40MPa, and the mist-like polysulfone resin liquid contacts the high-pressure steam, and the solvent in the polysulfone resin liquid is quickly vaporized to form solvent gas, and is discharged together with the high-pressure steam, and the polysulfone resin is solidified and precipitated, and sinks to the bottom of the precipitation drying kettle 1 in the form of particles. It can be understood that the filtered polysulfone resin solution is contained in the collecting tank 27, and the feed end of the feed pipe 21 extends into the collecting tank 27, and the pressure pump is started to pump the polysulfone resin solution in the collecting tank 27 to the nozzle 24, and then enters the precipitation drying kettle 1.

[0053] Furthermore, the nozzle 24 is rotatably mounted on the first mounting port 11 , and a rotary joint is provided between the nozzle 24 and the feed pipe 21 .

[0054] By adopting the above technical scheme, the nozzle 24 is rotatable, and the polysulfone resin solution of mist can be contacted with steam more fully, further improving the vaporization effect of the solvent in the polysulfone resin solution, making the polysulfone resin solidify and separate out more fully, both ensuring that the particle diameter of the polysulfone resin is smaller, and also improving the productivity of the polysulfone resin. And the nozzle 24 is arranged on the top of the precipitation drying kettle 1, helping to extend the contact time of the polysulfone resin solution of mist and steam, to improve the vaporization effect of the solvent. It is understandable that the feed pipe 21 is provided with the third valve 23, when it is necessary to transport the polysulfone resin solution to the precipitation drying kettle 1, the third valve 23 is opened, and when it is necessary to stop the input of the polysulfone resin solution, the third valve 23 is closed.

[0055] It should be noted that the rotation speed of the nozzle 24 is 200-800 rpm; the volume of the coagulation drying kettle 1 is 3-5 times the volume of the polysulfone resin solution to be sprayed. For example, when the volume of the coagulation drying kettle 1 is 100L, the volume of the polysulfone resin solution to be sprayed is 20L.

[0056] In order to ensure that high-pressure steam can be smoothly transported into the coagulation and drying kettle 1, the steam input device includes a steam distributor 34, an air inlet pipe 31 and a steam controller 32. The steam distributor 34 is installed on the second installation port 12, the air inlet pipe 31 is connected to the air inlet end of the steam distributor, and the steam controller 32 is arranged on the air inlet pipe 31.

[0057] By adopting the above technical solution, the steam controller 32 can adjust the pressure of water vapor so that the water vapor is ejected through the steam distributor 34 at a pressure of 0.5 to 1.0 MPa, so that the temperature in the precipitation drying kettle 1 is maintained at 160 to 180°C, which is higher than the boiling point of the solvent in the raw materials for preparing the polysulfone resin, so that the solvent can be better vaporized and the polysulfone resin can be better solidified and precipitated.

[0058] It is understandable that a fourth valve 33 is provided on the air inlet pipe 31. When high-pressure steam needs to be delivered to the coagulation and drying kettle 1, the fourth valve 33 is opened, and when the input of high-pressure steam needs to be stopped, the fourth valve 33 is closed.

[0059] Specifically, the polysulfone resin production equipment 100 further includes a filter screen 131, which is disposed at the air inlet end of the exhaust port 13, and the first exhaust pipe 132 and the second exhaust pipe 133 are respectively connected to the air outlet end of the exhaust port 13. In this way, the filter screen 131 can intercept the polysulfone resin particles to prevent the polysulfone resin particles from being discharged along with the steam and other gases.

[0060] Furthermore, the polysulfone resin production equipment 100 further includes a reflux pipe 42 , one end of which is connected to the gas outlet 411 , and the other end of which is connected to the steam controller 32 , and a second pressure pump 43 is disposed on the reflux pipe 42 .

[0061] By adopting the above technical solution, the water vapor and solvent gas discharged from the first exhaust pipe 132 enter the flash tank 41. The flash tank 41 is provided with a cooling device to cool the water vapor and solvent gas in the tank. Since the boiling point of the solvent is higher than that of water, the solvent gas is quickly condensed and liquefied to form a liquid when it is cooled, and falls to the bottom of the flash tank 41, while most of the water vapor and a very small part of the solvent gas are discharged from the air outlet 411 and pumped to the air inlet end of the steam controller 32 through the second booster pump 43 to serve as a steam source for high-pressure steam, thereby realizing the recycling of resources and reducing the amount of waste liquid generated.

[0062] In order to better discharge the steam generated by the polysulfone resin particles during the drying process, the polysulfone resin production equipment 100 also includes a condenser 71 connected to the second exhaust pipe 133, a condensation water tank 72 connected to the condenser 71, and a vacuum device 73 connected to the condensation water tank 72.

[0063] By adopting the above technical solution, the vacuum device 73 puts the condensation water tank 72 and the condenser 71 in a negative pressure state, so that the second exhaust pipe 133 can better discharge the steam in the precipitation drying kettle 1 to fully dry the polysulfone resin particles.

[0064] In an embodiment of the present invention, the heating device comprises a first jacket 51 disposed on the outer wall of the coagulation and drying kettle 1 , and a steam inlet 511 is disposed on one side of the first jacket 51 , and a steam outlet 512 is disposed on the other side.

[0065] By adopting the above technical solution, when it is necessary to dry the polysulfone resin particles at the bottom of the coagulation drying kettle 1, high-temperature steam (temperature is 120-150°C) is input from the steam inlet 511, and the high-temperature steam enters the first jacket 51 to dry the polysulfone resin particles in the coagulation drying kettle 1. After heat exchange, the temperature of the high-temperature steam is reduced, and the cooled steam is discharged from the steam outlet 512, and the cycle is repeated to dry the polysulfone resin particles in the coagulation drying kettle 1.

[0066] Furthermore, the heating device also includes a stirring device, and the stirring device is arranged at the lower part of the coagulation and drying kettle 1.

[0067] By adopting the above technical solution, when the polysulfone resin particles are dried, the stirring device is started, so that the polysulfone resin particles can be dried more fully.

[0068] Specifically, the stirring device includes a stirring shaft 52 rotatably disposed in the coagulation and drying kettle 1 , and a stirring blade 521 disposed on the stirring shaft 52 , and the stirring shaft 52 is parallel to a horizontal plane.

[0069] In an embodiment of the present invention, the cooling device comprises a second jacket 6 arranged on the outer wall of the flash tank 41 , a cooling water inlet 61 is arranged on one side of the second jacket 6 , and a cooling water outlet 62 is arranged on the other side of the second jacket 6 .

[0070] By adopting the above technical solution, cooling water (tap water with a temperature of about 25°C) enters the second jacket 6 through the cooling water inlet 61 to cool the high-temperature water vapor and solvent gas in the tank. After heat exchange, the temperature of the cooling water in the second jacket 6 increases and flows out from the cooling water outlet 62. This cycle is repeated to better cool the high-temperature water vapor and solvent gas in the tank.

[0071] In order to more fully remove by-products such as solid salts in the polysulfone resin solution to improve the purity of the final product, in the direction from feed to liquid outlet, the filter 26 includes a first filter membrane 261, a second filter membrane 262, and a third filter membrane 263 arranged in sequence; the first filter membrane 261 has filter holes with a pore size of 30 to 50 μm; the second filter membrane 262 has filter holes with a pore size of 10 to 20 μm; the third filter membrane 263 has filter holes with a pore size of 3 to 8 μm.

[0072] By adopting the above technical scheme, after the polysulfone resin solution is filtered by the three-layer filter membrane, by-products such as solid salts in the polysulfone resin solution can be separated more fully, the pore sizes of the filter holes of the three-layer filter membrane decrease successively, and the filter holes of each layer of the filter membrane adopt a pore size within a specific range, so that the filtered polysulfone resin solution almost does not contain by-products such as solid salts, and the purity of the obtained polysulfone resin product is better guaranteed, and the grayscale of the obtained polysulfone resin product is ≤0.1%.

[0073] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A polysulfone resin production equipment, characterized in that, include: The coagulation and drying kettle has a first installation opening on the top, a second installation opening on one side of the upper part of the coagulation and drying kettle, an exhaust port on the other side of the upper part, and a discharge port on the bottom; A spray device, installed at the first installation port; A steam input device is installed at the second installation port; A heating device is arranged on the coagulation drying kettle; and The solvent collecting device comprises a flash tank and a cooling device arranged on the flash tank, wherein the flash tank is connected to the exhaust port through a first exhaust pipe, an air outlet is arranged at the top of the flash tank, and a liquid discharge port is arranged at the bottom.

2. The polysulfone resin production equipment according to claim 1, characterized in that: The spray device comprises: A nozzle, mounted on the first mounting port, and the nozzle has a nozzle hole with an aperture of 0.5 to 2.0 mm; a feed pipe connected to the nozzle; and The first pressure pump is arranged on the feed pipe.

3. The polysulfone resin production equipment according to claim 1, characterized in that: The steam input device comprises: A steam distributor is installed at the second installation port. an air inlet pipe connected to the air inlet end of the steam distributor; and A steam controller is arranged on the air inlet pipe.

4. The polysulfone resin production equipment according to claim 3, characterized in that: The polysulfone resin production equipment also includes a reflux pipe, one end of which is connected to the gas outlet, and the other end of which is connected to the steam controller, and a second pressure pump is arranged on the reflux pipe.

5. The polysulfone resin production equipment according to claim 1, characterized in that: The polysulfone resin production equipment also includes a condenser connected to the exhaust port through a second exhaust pipe, a condensation water tank connected to the condenser, and a vacuum device connected to the condensation water tank.

6. The polysulfone resin production equipment according to claim 1, characterized in that: The heating device comprises a first jacket arranged on the outer wall of the coagulation drying kettle, wherein a steam inlet is arranged on one side of the first jacket and a steam outlet is arranged on the other side thereof.

7. The polysulfone resin production equipment according to claim 1, characterized in that: The cooling device comprises a second jacket arranged on the outer wall of the flash tank, wherein a cooling water inlet is arranged on one side of the second jacket, and a cooling water outlet is arranged on the other side of the second jacket.

8. The polysulfone resin production equipment according to claim 1, characterized in that: The polysulfone resin production equipment also includes: A reaction kettle for generating a polysulfone resin solution; and A filter, used for solid-liquid separation of the polysulfone resin solution generated in the reactor; Wherein, the spray device is used to spray the liquid after solid-liquid separation into the precipitation drying kettle in the form of mist.

9. The polysulfone resin production equipment according to claim 8, characterized in that: In the direction from feed to liquid outlet, the filter comprises a first filter membrane with a pore size of 30-50 μm, a second filter membrane with a pore size of 10-20 μm, and a third filter membrane with a pore size of 3-8 μm, which are arranged in sequence.

10. The polysulfone resin production equipment according to claim 1, characterized in that: A stirring device is arranged at the lower part of the precipitation drying kettle.

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