A hydration system for preparing acrylamide crystals

Abstract

The present invention relates to a hydration system for preparing acrylamide crystals, comprising a mycelium unit, the mycelium unit comprising a pair of mycelium storage tanks arranged in parallel; a hydration reaction unit, the hydration reaction unit comprising at least one hydration reaction kettle; an ultrafiltration unit, the ultrafiltration unit comprising a plurality of ultrafiltration membranes arranged in parallel; an aqueous solution metering unit, the aqueous solution metering unit comprising a pair of finished product storage tanks arranged in parallel and a finished product metering tank; a chemical cleaning unit, the chemical cleaning unit comprising a chemical cleaning tank; a recycled water unit, the recycled water unit comprising an underground tank and a recycled water storage tank. The advantages of the present invention are: by using the coordination among the mycelium unit, the hydration reaction unit, the ultrafiltration unit, the aqueous solution metering unit, the cleaning unit, and the recycled water unit, the waste liquid and waste generated in the entire reaction process can be recycled and treated, the discharge of toxic substances can be reduced, and the protection of the surrounding environment is beneficial.

Description

Technical Field

[0001] The invention relates to the field of acrylamide preparation, in particular to a hydration system for preparing acrylamide crystals. Background Art

[0002] Acrylamide is a white crystalline chemical substance and is the raw material for producing polyacrylamide. Polyacrylamide is mainly used in oil and gas extraction, papermaking, water treatment, mineral washing, coatings, textiles, metallurgy, cement reinforcing agent, super absorbent resin, adhesive, leather retanning agent and other fields.

[0003] The existing method for preparing acrylamide is as follows: the raw material acrylonitrile is reacted with water at about 20°C using a biological enzyme catalyst (cultured in the strain room and produced in the fermentation workshop) to generate an acrylamide aqueous solution, which is then refined, concentrated, crystallized, centrifuged, dried, and other processes to obtain an acrylamide crystal product.

[0004] In the above-mentioned preparation process of acrylamide, when the hydration reaction is carried out, since the acrylamide produced is toxic in itself, and the acrylonitrile used as the raw material is also toxic and flammable and explosive, the circulation of acrylonitrile and acrylamide is required during the hydration reaction. Long-term operation will inevitably lead to residual toxic liquids in various places such as pipelines and storage containers. In addition, some waste liquids and wastes generated during the hydration reaction are also toxic. If they are discharged directly, they will inevitably pollute the surrounding environment and are not conducive to the environment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a hydration system for preparing acrylamide crystals which can periodically treat and reduce toxic residues and toxic emissions.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a hydration system for preparing acrylamide crystals, the innovation of which is: comprising:

[0007] A mycelium unit, the mycelium unit comprising a pair of mycelium storage tanks arranged in parallel, the top of the mycelium storage tanks having a fermentation liquid inlet, the bottom of the mycelium storage tanks having a fermentation liquid outlet and a sewage outlet;

[0008] A hydration reaction unit, wherein the hydration reaction unit comprises at least one hydration reaction kettle, the top of which is connected to the fermentation liquid outlet of the bacterial cell storage tank through a connecting pipe, and the bottom of which is provided with a reaction liquid outlet;

[0009] An ultrafiltration unit, the ultrafiltration unit comprises a plurality of ultrafiltration membranes arranged in parallel, the middle side end of the ultrafiltration membrane has a reaction liquid inlet, a finished solution outlet, and a first alkali liquid outlet, the upper side end has a waste mycelium outlet and a retained liquid outlet, the lower side end has a first alkali liquid inlet and a second alkali liquid outlet, the top end has a second alkali liquid inlet, the reaction liquid inlet of the ultrafiltration membrane is connected to the reaction liquid outlet of the hydration reactor through a reaction liquid supply pipeline, a reaction filter and an ultrafiltration membrane pump are sequentially installed on the reaction liquid supply pipeline, the retained liquid outlet of the ultrafiltration membrane is connected to the hydration reactor through a pipeline, and a sewage outlet is also provided on the reaction filter;

[0010] An aqueous solution metering unit, the aqueous solution metering unit comprises a pair of parallel distributed finished product storage tanks and a finished product metering tank, a finished product solution inlet is provided at the top of the finished product storage tank, a finished product solution outlet is provided at the lower side, a finished product solution inlet is provided at the top of the finished product metering tank, a finished product solution outlet is provided at the lower side, the finished product solution inlet of the finished product storage tank is connected to the finished product solution outlet of the ultrafiltration membrane through a finished product pipeline, the finished product solution outlet of the finished product storage tank is connected to the finished product solution inlet of the finished product metering tank through a finished product liquid supply pipeline, a finished product pump is also provided on the finished product liquid supply pipeline, the finished product solution outlet of the finished product metering tank is connected to the refining process through a metering liquid supply pipeline, and a finished product metering pump is provided on the metering liquid supply pipeline;

[0011] A chemical cleaning unit, the chemical cleaning unit comprising a chemical cleaning tank, with a waste mycelium inlet and an alkali solution inlet at the top of the chemical cleaning tank, and an alkali solution outlet and a sewage outlet at the bottom, the waste mycelium inlet of the chemical cleaning tank is connected to the waste mycelium outlet of the ultrafiltration membrane through a pipeline, the alkali solution inlet of the chemical cleaning tank is connected to the alkali solution source through an alkali solution supply pipeline, the alkali solution outlet of the chemical cleaning tank is connected to the first alkali solution inlet and the second alkali solution inlet of the ultrafiltration membrane through an alkali solution discharge pipeline, and a chemical cleaning pump is also provided on the alkali solution discharge pipeline;

[0012] A water recovery unit, the water recovery unit includes an underground tank and a water recovery tank, the upper end of the underground tank is provided with an opening, the lower end is provided with a water outlet, the top end of the water recovery tank is provided with a liquid inlet, and the lower side end is provided with a liquid outlet, the opening of the underground tank is connected with the sewage outlet of the bacterial storage tank, the sewage outlet of the reaction filter, and the sewage outlet of the chemical cleaning tank through a pipeline, the water outlet of the underground tank is connected with the liquid inlet of the water recovery tank through a water recovery pipeline, and the liquid outlet of the water recovery tank is connected with the hydration reactor through a pipeline.

[0013] Furthermore, the bottom end of the bacterial cell storage tank is provided with a frozen brine liquid inlet, the upper side end is provided with a frozen brine liquid outlet, and the top end of the ultrafiltration membrane is provided with a desalted water liquid inlet.

[0014] Furthermore, a wire mesh is provided on the reaction liquid supply pipeline between the reaction filter and the ultrafiltration membrane pump.

[0015] Furthermore, the top of the finished product metering tank also has a circulating liquid inlet, which is connected to the metering liquid supply pipeline through a circulating pipeline, and the connection between the circulating pipeline and the metering liquid supply pipeline is located on the liquid outlet side of the finished product metering pump.

[0016] Furthermore, the two sides of the lower side end of the recovery water storage tank are respectively provided with a frozen brine inlet and a frozen brine outlet.

[0017] Furthermore, the bacterial cell storage tank, finished product storage tank, finished product metering tank, underground tank, and recovered water storage tank are each provided with a compressed air inlet, and the compressed air inlet is connected to an air supply source through a compressed air supply pipe.

[0018] Furthermore, the top of the bacterial cell storage tank, the top of the finished product storage tank, the top of the finished product metering tank, the top of the chemical cleaning tank, and the top of the recovered water storage tank are all provided with a drain pipe.

[0019] The advantages of the present invention are as follows: the hydration system of the present invention adopts the coordination among the mycelium unit, the hydration reaction unit, the ultrafiltration unit, the water dosage unit, the cleaning unit and the water recovery unit, so that the waste liquid and waste generated in the whole reaction process can be recovered and processed, the emission of toxic substances can be reduced, and it is beneficial to the protection of the surrounding environment.

[0020] The frozen brine inlet and the frozen brine outlet are arranged on the bacteria storage tank, so that frozen brine can be introduced into the bacteria storage tank to cool it down, avoiding the temperature of the bacteria storage tank being too high due to long-term work, which may cause explosion in subsequent reactions, thereby improving safety; and the desalted water inlet is arranged on the ultrafiltration membrane, so that desalted water is added to the ultrafiltration membrane when the ultrafiltration membrane is used for filtration, so as to remove some salt residues caused by the use of frozen brine to cool the bacteria storage tank and circulate in the system.

[0021] A wire mesh is arranged between the reaction filter and the ultrafiltration membrane pump so that when the reaction liquid enters the ultrafiltration membrane for filtration, the waste mycelium contained in the reaction liquid is first removed for preliminary filtration.

[0022] The circulating liquid inlet is arranged on the finished product metering tank, so that the finished product solution in the finished product metering tank can be circulated, thereby preventing the finished product solution from crystallizing in the finished product metering tank.

[0023] The frozen brine inlet and the frozen brine outlet are arranged on the recovery water storage tank, so that the recovery water storage tank can be cooled by using the frozen brine to avoid the temperature of the recovery water storage tank being too high.

[0024] The compressed air inlets designed on the bacterial cell storage tank, finished product storage tank, finished product metering tank, underground tank and recovered water storage tank can regularly introduce compressed air into the bacterial cell storage tank, finished product storage tank, finished product metering tank, underground tank and recovered water storage tank for cleaning, thereby reducing the residues of acrylonitrile and acrylamide and improving safety.

[0025] The drain pipes designed on the top of the bacterial storage tank, the top of the finished product storage tank, the top of the finished product metering tank, the top of the chemical cleaning tank, and the top of the recovered water storage tank are to facilitate the circulation of liquids in the bacterial storage tank, the finished product storage tank, the finished product metering tank, the chemical cleaning tank, and the recovered water storage tank to avoid blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] Figure 1 Schematic diagram of the mycelium unit in the present invention.

[0028] Figure 2 It is a schematic diagram of the ultrafiltration unit in the present invention.

[0029] Figure 3 It is a schematic diagram of the water dosage unit in the present invention.

[0030] Figure 4 It is a schematic diagram of the chemical cleaning unit in the present invention.

[0031] Figure 5 It is a schematic diagram of the water recovery unit in the present invention. DETAILED DESCRIPTION

[0032] The following embodiments can enable those skilled in the art to more fully understand the present invention, but the present invention is not limited to the scope of the embodiments.

[0033] like Figure 1-Figure 5 An acrylamide crystal preparation method is shown using a hydration system comprising:

[0034] A mycelium unit, the mycelium unit includes a pair of parallelly distributed mycelium storage tanks 1, a fermentation liquid inlet is provided at the top of the mycelium storage tank 1, a fermentation liquid feed pipe 13 is connected to the fermentation liquid inlet, a fermentation liquid outlet and a sewage outlet are provided at the bottom of the mycelium storage tank 1, a fermentation liquid discharge pipe 11 is connected to the fermentation liquid outlet, and a sewage outlet is connected to the sewage pipe 12. In the present embodiment, the fermentation liquid outlet and the sewage outlet are the same outlet, and valves are installed on the fermentation liquid discharge pipe 11 and the sewage pipe 12, so that the fermentation liquid can be delivered or discharged by opening and closing different valves.

[0035] The bottom end of the bacterial cell storage tank 1 is also provided with a frozen brine inlet, which is connected to a frozen brine supply source through a frozen brine supply pipe 14. The upper side end of the bacterial cell storage tank 1 is provided with a frozen brine outlet, which is connected to a frozen brine supply source through a frozen brine outlet pipe 15. Valves are installed on the frozen brine supply pipe 14 and the frozen brine outlet pipe 15. With the frozen brine inlet and the frozen brine outlet provided on the bacterial cell storage tank 1, frozen brine can be introduced into the bacterial cell storage tank 1 to cool the bacterial cell storage tank 1, thereby avoiding the phenomenon of explosion during subsequent reactions caused by excessive temperature of the bacterial cell storage tank 1 due to long-term operation, thereby improving safety.

[0036] A hydration reaction unit, the hydration reaction unit includes at least one hydration reaction kettle, the top of the hydration reaction kettle is connected to the fermentation liquid outlet of the bacterial cell storage tank 1 through a connecting pipe, and the bottom of the hydration reaction kettle has a reaction liquid outlet.

[0037] An ultrafiltration unit, the ultrafiltration unit includes several ultrafiltration membranes 2 distributed in parallel, the middle side end of the ultrafiltration membrane 2 is provided with a reaction liquid inlet, a finished solution outlet, and a first alkali solution outlet, the reaction liquid inlet of the ultrafiltration membrane 2 is connected to the reaction liquid outlet of the hydration reactor through a reaction liquid supply pipeline 23, a reaction filter 21 and an ultrafiltration membrane pump 22 are sequentially installed on the reaction liquid supply pipeline 23, a sewage outlet is also provided on the reaction filter 21, and a sewage outlet is connected to the sewage outlet 24, the finished solution outlet of the ultrafiltration membrane 2 is connected to a finished solution outlet pipeline 201, the first alkali solution outlet of the ultrafiltration membrane 2 is connected to a first alkali solution outlet pipeline 202, and valves are installed on the reaction liquid supply pipeline 23, the finished solution outlet pipeline 201, and the first alkali solution outlet pipeline 202.

[0038] The upper side end of the ultrafiltration membrane 2 has a waste mycelium outlet and a retentate outlet, a waste mycelium discharge pipe 203 is connected to the waste mycelium outlet of the ultrafiltration membrane 2, and a retentate outlet pipe 205 is connected to the retentate outlet of the ultrafiltration membrane 2, the retentate outlet pipe 205 is connected to the hydration reactor, and valves are installed on the waste mycelium discharge pipe 203 and the retentate outlet pipe 205. In this embodiment, the waste mycelium outlet and the retentate outlet are the same outlet, and the discharge of the waste mycelium or the retentate is achieved by opening and closing different valves on the waste mycelium discharge pipe 203 and the retentate outlet pipe 205.

[0039] The lower side end of the ultrafiltration membrane 2 has a first alkali solution inlet and a second alkali solution outlet. The first alkali solution inlet of the ultrafiltration membrane 2 is connected to a first alkali solution supply pipeline 205, and the second alkali solution outlet pipeline 206 is connected to the second alkali solution outlet of the ultrafiltration membrane 2. Valves are installed on the first alkali solution supply pipeline 205 and the second alkali solution outlet pipeline 206.

[0040] A second alkali solution inlet is provided at the top of the ultrafiltration membrane 2 , and a second alkali solution supply pipeline 207 is connected to the second alkali solution inlet of the ultrafiltration membrane 2 , and a valve is also installed on the second alkali solution supply pipeline 207 .

[0041] The first alkali solution supply pipeline 205 cooperates with the first alkali solution outlet pipeline 202 to realize the circulation of the alkali solution at the first circulation point in the ultrafiltration membrane 2, and the second alkali solution supply pipeline 207 cooperates with the second alkali solution outlet pipeline 206 to realize the circulation of the alkali solution at the second circulation point in the ultrafiltration membrane 2.

[0042] A wire mesh 25 is also provided on the reaction liquid supply pipeline 23 between the reaction filter 21 and the ultrafiltration membrane pump 22. The wire mesh 25 provided between the reaction filter 21 and the ultrafiltration membrane pump 22 is used to perform preliminary filtration on the reaction liquid when the reaction liquid enters the ultrafiltration membrane 2 for filtration, so as to remove the waste mycelium contained in the reaction liquid.

[0043] There is also a desalted water inlet at the top of the ultrafiltration membrane 2, and the desalted water inlet is connected to the desalted water supply source through a desalted water supply pipe 26. For the desalted water inlet set on the ultrafiltration membrane, when the ultrafiltration membrane is used for filtration, desalted water is added to the ultrafiltration membrane 2. Since frozen brine is used for cooling in the bacterial cell storage tank 1, some salt will inevitably remain in the bacterial cell storage tank 1. As the reaction continues, this part of the salt will circulate in the entire hydration system with the circulation of the solution. Therefore, desalted water is added to the ultrafiltration membrane 2 to remove the salt contained in the solution.

[0044] An aqueous solution metering unit, the aqueous solution metering unit includes a pair of parallel distributed finished product storage tanks 3 and a finished product metering tank 31, a finished product solution inlet is provided at the top end of the finished product storage tank 3, a finished product solution outlet is provided at the lower side end of the finished product storage tank 3, a finished solution inlet is provided at the top end of the finished product metering tank 31, and a finished solution outlet is provided at the lower side end of the finished product metering tank 31.

[0045] The finished solution inlet of the finished product storage tank 3 is connected to the finished solution outlet pipe 201 of the ultrafiltration membrane 2 through the finished product pipeline 32, and the finished solution outlet of the finished product storage tank 3 is connected to the finished solution inlet of the finished product metering tank 31 through the finished product supply pipeline 33. A finished product pump 34 is also provided on the finished product supply pipeline 33. The finished solution outlet of the finished product metering tank 31 is connected to the refining process through the metering supply pipeline 35. A finished product metering pump 36 is provided on the metering supply pipeline 35. Valves are installed on the finished product pipeline 32, the finished product supply pipeline 33 and the metering supply pipeline 35.

[0046] There is also a circulating liquid inlet at the top of the finished product metering tank 31, which is connected to the metering liquid supply pipe 35 through a circulating pipe 37, and the connection between the circulating pipe 37 and the metering liquid supply pipe 35 is located at the liquid outlet side of the finished product metering pump 36, and a valve is also installed on the circulating pipe 37. The circulating liquid inlet provided on the finished product metering tank 31 allows the finished product solution in the finished product metering tank 31 to circulate and avoid crystallization of the finished product solution in the finished product metering tank 31.

[0047] A chemical cleaning unit comprises a chemical cleaning tank 4, the top of which is provided with a waste mycelium inlet, an alkali solution inlet and a circulating alkali solution inlet, and the bottom of which is provided with an alkali solution outlet and a sewage outlet.

[0048] The waste mycelium inlet of the chemical cleaning tank 4 is connected to the waste mycelium discharge pipe 203 of the ultrafiltration membrane 2 through a pipe 41, the alkali solution inlet of the chemical cleaning tank 4 is connected to the alkali solution source through an alkali solution supply pipe 42, the circulating alkali solution inlet of the chemical cleaning tank 4 is connected to the first alkali solution outlet pipe 202 and the second alkali solution outlet pipe 206 of the ultrafiltration membrane 2 through an alkali solution feed pipe 45, the alkali solution outlet of the chemical cleaning tank 4 is connected to the first alkali solution supply pipe 205 and the second alkali solution supply pipe 207 of the ultrafiltration membrane 2 through an alkali solution discharge pipe 43, a chemical cleaning pump 44 is also provided on the alkali solution discharge pipe 43, a sewage pipe 45 is connected to the sewage outlet of the chemical cleaning tank 4, and valves are installed on the pipe 41, the alkali solution supply pipe 42, the alkali solution feed pipe 45, the alkali solution discharge pipe 43 and the sewage pipe 45.

[0049] A water recovery unit, the water recovery unit includes an underground tank 5 and a water recovery tank 51, the upper end of the underground tank 5 has an opening, the bottom end of the underground tank 5 has a water outlet, the top end of the water recovery tank 51 has a liquid inlet, and the lower side end of the water recovery tank 51 has a liquid outlet.

[0050] The opening of the underground tank 5 is connected to the sewage pipe 12 of the bacterial storage tank 1, the sewage pipe 24 of the reaction filter 21, and the sewage pipe 45 of the chemical cleaning tank 4 through a pipe. The water outlet of the underground tank 5 is connected to the liquid inlet of the recovery water storage tank 51 through a recovery water pipe 52. The liquid outlet of the recovery water storage tank 51 is connected to the hydration reactor through a pipe 53. Valves are installed on the recovery water pipe 52 and the pipe 53.

[0051] A chilled brine inlet and a chilled brine outlet are respectively provided on both sides of the lower end of the recovery water storage tank 51. A chilled brine feed pipe 54 is connected to the chilled brine inlet of the recovery water storage tank 51, and a chilled brine discharge pipe 55 is connected to the chilled brine outlet of the recovery water storage tank 51. The chilled brine feed pipe 54 and the chilled brine discharge pipe 55 are both connected to a chilled brine supply source. The chilled brine inlet and the chilled brine outlet provided on the recovery water storage tank 51 can utilize chilled brine to cool the recovery water storage tank 51, thereby preventing the temperature of the recovery water storage tank 51 from being too high.

[0052] There is also a compressed air inlet on the bacterial cell storage tank 1, the finished product storage tank 3, the finished product metering tank 31, the underground tank 5, and the recovered water storage tank 51. The compressed air inlet of the bacterial cell storage tank 1 is connected to the air supply source through the first compressed air supply pipe 15, the compressed air inlet of the finished product storage tank 3 is connected to the air supply source through the second compressed air supply pipe 38, the compressed air inlet of the finished product metering tank 31 is connected to the air supply source through the third compressed air supply pipe 39, the compressed air inlet of the underground tank 5 is connected to the air supply source through the fourth compressed air supply pipe 56, and the compressed air inlet of the recovered water storage tank 51 is connected to the air supply source through the fifth compressed air supply pipe 57. The compressed air inlets designed on the bacterial cell storage tank 1, the finished product storage tank 3, the finished product metering tank 31, the underground tank 5, and the recovered water storage tank 51 can regularly introduce compressed air into the bacterial cell storage tank 1, the finished product storage tank 3, the finished product metering tank 31, the underground tank 5, and the recovered water storage tank 51 to clean the bacterial cell storage tank 1, the finished product storage tank 3, the finished product metering tank 31, the underground tank 5, and the recovered water storage tank 51, thereby reducing the residual acrylonitrile and acrylamide in the bacterial cell storage tank 1, the finished product storage tank 3, the finished product metering tank 31, the underground tank 5, and the recovered water storage tank 51 and improving the safety of the entire hydration system.

[0053] The top of the bacterial cell storage tank 1 is provided with a first drain pipe 16, the top of the finished product storage tank 3 is provided with a second drain pipe 301, the top of the finished product metering tank 31 is provided with a third drain pipe 302, the top of the chemical cleaning tank 4 is provided with a fourth drain pipe 46, and the top of the recovery water storage tank 51 is provided with a fifth drain pipe 58. The drain pipes designed at the top of the bacterial cell storage tank 1, the top of the finished product storage tank 3, the top of the finished product metering tank 31, the top of the chemical cleaning tank 4, and the top of the recovery water storage tank 51 are to facilitate the circulation of liquids in the bacterial cell storage tank 1, the finished product storage tank 3, the finished product metering tank 31, the chemical cleaning tank 4, and the recovery water storage tank 51 to avoid blockage.

[0054] Working principle: First, mycelium and a certain amount of deionized water are added into the hydration reactor from the bacterial cell storage tank 1, and then acrylonitrile is slowly added through the tank area frequency conversion pump under the action of stirring, and the hydration reaction is carried out at 18°C ​​and normal pressure. The hydration process uses 0°C liquid ammonia for direct evaporation refrigeration. Under the action of the microbial catalyst, acrylonitrile is quickly converted into acrylamide. After the reaction, a hydration reaction liquid is formed. Then, with the cooperation of the reaction filter 21 and the ultrafiltration membrane pump 22, the hydration reaction liquid is pumped into the ultrafiltration membrane 2, and the mycelium in the reaction liquid is removed by the ultrafiltration membrane 2 to obtain a crude acrylamide solution. The crude acrylamide solution is then sent to the finished product storage tank 3 for temporary storage, and the crude acrylamide solution in the finished product storage tank 3 is then sent to the finished product metering tank 31 for quantitative metering, and the metered finished product metering tank 31 is sent to the refining process for fine processing, and the separated mycelium is sent to the chemical cleaning tank 4 for treatment and recovery, and then sent to the hydration reactor for recycling until it fails.

[0055] The hydration system of the present invention adopts the coordination among the mycelium unit, the hydration reaction unit, the ultrafiltration unit, the water dosage unit, the cleaning unit and the water recovery unit, so as to recycle the waste liquid and waste generated in the whole reaction process, reduce the emission of toxic substances, and be beneficial to the protection of the surrounding environment.

[0056] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hydration system for preparing acrylamide crystals, characterized in that: include A mycelium unit, the mycelium unit comprising a pair of mycelium storage tanks arranged in parallel, the top of the mycelium storage tanks having a fermentation liquid inlet, the bottom of the mycelium storage tanks having a fermentation liquid outlet and a sewage outlet; A hydration reaction unit, wherein the hydration reaction unit comprises at least one hydration reaction kettle, the top of which is connected to the fermentation liquid outlet of the bacterial cell storage tank through a connecting pipe, and the bottom of which is provided with a reaction liquid outlet; An ultrafiltration unit, the ultrafiltration unit comprises a plurality of ultrafiltration membranes arranged in parallel, the middle side end of the ultrafiltration membrane has a reaction liquid inlet, a finished solution outlet, and a first alkali liquid outlet, the upper side end has a waste mycelium outlet and a retained liquid outlet, the lower side end has a first alkali liquid inlet and a second alkali liquid outlet, the top end has a second alkali liquid inlet, the reaction liquid inlet of the ultrafiltration membrane is connected to the reaction liquid outlet of the hydration reactor through a reaction liquid supply pipeline, a reaction filter and an ultrafiltration membrane pump are sequentially installed on the reaction liquid supply pipeline, the retained liquid outlet of the ultrafiltration membrane is connected to the hydration reactor through a pipeline, and a sewage outlet is also provided on the reaction filter; An aqueous solution metering unit, the aqueous solution metering unit comprises a pair of parallel distributed finished product storage tanks and a finished product metering tank, a finished product solution inlet is provided at the top of the finished product storage tank, a finished product solution outlet is provided at the lower side, a finished product solution inlet is provided at the top of the finished product metering tank, a finished product solution outlet is provided at the lower side, the finished product solution inlet of the finished product storage tank is connected to the finished product solution outlet of the ultrafiltration membrane through a finished product pipeline, the finished product solution outlet of the finished product storage tank is connected to the finished product solution inlet of the finished product metering tank through a finished product liquid supply pipeline, a finished product pump is also provided on the finished product liquid supply pipeline, the finished product solution outlet of the finished product metering tank is connected to the refining process through a metering liquid supply pipeline, and a finished product metering pump is provided on the metering liquid supply pipeline; A chemical cleaning unit, the chemical cleaning unit comprising a chemical cleaning tank, with a waste mycelium inlet and an alkali solution inlet at the top of the chemical cleaning tank, and an alkali solution outlet and a sewage outlet at the bottom, the waste mycelium inlet of the chemical cleaning tank is connected to the waste mycelium outlet of the ultrafiltration membrane through a pipeline, the alkali solution inlet of the chemical cleaning tank is connected to the alkali solution source through an alkali solution supply pipeline, the alkali solution outlet of the chemical cleaning tank is connected to the first alkali solution inlet and the second alkali solution inlet of the ultrafiltration membrane through an alkali solution discharge pipeline, and a chemical cleaning pump is also provided on the alkali solution discharge pipeline; A water recovery unit, the water recovery unit includes an underground tank and a water recovery tank, the upper end of the underground tank is provided with an opening, the lower end is provided with a water outlet, the top end of the water recovery tank is provided with a liquid inlet, and the lower side end is provided with a liquid outlet, the opening of the underground tank is connected with the sewage outlet of the bacterial storage tank, the sewage outlet of the reaction filter, and the sewage outlet of the chemical cleaning tank through a pipeline, the water outlet of the underground tank is connected with the liquid inlet of the water recovery tank through a water recovery pipeline, and the liquid outlet of the water recovery tank is connected with the hydration reactor through a pipeline.

2. The hydration system for preparing acrylamide crystals according to claim 1, characterized in that: The bottom end of the bacterial cell storage tank is also provided with a frozen salt water inlet, the upper side end is provided with a frozen salt water outlet, and the top end of the ultrafiltration membrane is also provided with a desalted water inlet.

3. The hydration system for preparing acrylamide crystals according to claim 1, characterized in that: A wire mesh is also arranged on the reaction liquid supply pipeline between the reaction filter and the ultrafiltration membrane pump.

4. The hydration system for preparing acrylamide crystals according to claim 1, characterized in that: The top of the finished product metering tank is also provided with a circulating liquid inlet, which is connected to the metering liquid supply pipeline through a circulating pipeline, and the connection between the circulating pipeline and the metering liquid supply pipeline is located at the liquid outlet side of the finished product metering pump.

5. The hydration system for preparing acrylamide crystals according to claim 1, characterized in that: The two sides of the lower side end of the recovery water storage tank are respectively provided with a frozen brine inlet and a frozen brine outlet.

6. The hydration system for preparing acrylamide crystals according to claim 1, characterized in that: The bacterial cell storage tank, finished product storage tank, finished product metering tank, underground tank and recovered water storage tank are all provided with a compressed air inlet, which is connected to an air supply source through a compressed air supply pipe.

7. The hydration system for preparing acrylamide crystals according to claim 1, characterized in that: The top of the bacterial cell storage tank, the top of the finished product storage tank, the top of the finished product metering tank, the top of the chemical cleaning tank, and the top of the recovered water storage tank are all provided with an emptying pipe.

Images