A production system for preparing inositol and magnesium-ammonium phosphate using corn steep liquor and recovering ammonium chloride

Abstract

The utility model relates to corn soaking water treatment technical field especially, relates to a kind of production system for preparing inositol and ammonium magnesium phosphate with the recovery of ammonium chloride using corn soaking water, including resin column, nanofiltration membrane processing equipment, enzymatic hydrolysis kettle, first filtering device, first concentration kettle, chromatographic separation device being connected with corn soaking water supernatant delivery pipeline, eluent outlet of chromatographic separation device is connected with inositol liquid delivery pipeline and phosphate solution delivery pipeline respectively, inositol liquid delivery pipeline is connected with first crystallization kettle, second crystallization kettle, first drying device, inositol storage tank;Phosphate solution delivery pipeline is connected with reaction kettle, second filtering device, second drying device, ammonium magnesium phosphate storage tank;The filtrate outlet of second filtering device is connected with buffer kettle, second concentration kettle, centrifuge, third drying device and ammonium chloride storage tank. High yield, high recovery and high purity inositol product and ammonium magnesium phosphate product can be obtained using the above production system, and the recovery of ammonium chloride is realized.

Description

Technical Field

[0001] This utility model relates to the field of corn soaking water technology, and in particular to a production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water. Background Technology

[0002] Corn soaking water is wastewater generated during the corn soaking process in corn starch production. It is rich in phytic acid (inositol hexaphosphate), protein, sugars, inorganic salts, and other components. Phytic acid is the core precursor for the production of inositol, but the traditional process has the following drawbacks: (1) Resource waste: Phytic acid in corn soaking water is not efficiently extracted and utilized, and is discharged with wastewater; (2) Environmental pressure: Soaking water with high organic matter and high phosphorus is directly discharged, polluting water bodies and soil; (3) Poor economic efficiency: Existing inositol production mostly uses rice bran and other raw materials, which is costly, complex, and by-products (such as ammonium salts) are not recovered, resulting in low resource utilization. Therefore, it is necessary to develop a production system that uses corn soaking water to prepare inositol and magnesium ammonium phosphate and recover ammonium chloride. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride by using corn soaking water to address the shortcomings of the existing technology. This production system can produce high-yield, high-purity inositol and magnesium ammonium phosphate products and realize the recovery of ammonium chloride.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water includes a resin column connected to a corn soaking water supernatant delivery pipeline. The inlet of the resin column is connected to a desorption agent delivery pipeline, the outlet of the resin column is connected to a nanofiltration membrane treatment device, the outlet of the nanofiltration membrane treatment device is connected to an enzymatic hydrolysis vessel, the outlet of the enzymatic hydrolysis vessel is connected to a first filtration device, the outlet of the first filtration device is connected to a first concentration vessel, the outlet of the first concentration vessel is connected to a chromatographic separation device, the eluent outlet of the chromatographic separation device is connected to both an inositol solution delivery pipeline and a phosphate solution delivery pipeline, the inositol solution delivery pipeline is connected to a first crystallization vessel, the crystal outlet of the first crystallization vessel is connected to a second crystallization vessel, and the inlet of the second crystallization vessel is connected to a third crystallization vessel. The feed inlet is connected to an ethanol delivery pipeline; the crystal outlet of the second crystallizer is connected to a first drying device; the outlet of the first drying device is connected to an inositol storage tank; the phosphate solution delivery pipeline is connected to a reaction vessel; the feed inlet of the reaction vessel is connected to an ammonia delivery pipeline; the outlet of the reaction vessel is connected to a second filtration device; the filter residue outlet of the second filtration device is connected to a second drying device; the outlet of the second drying device is connected to a magnesium ammonium phosphate storage tank; the filtrate outlet of the second filtration device is connected to a buffer vessel; the feed inlet of the buffer vessel is connected to a hydrochloric acid delivery pipeline; the outlet of the buffer vessel is connected to a second concentration vessel; the concentrate outlet of the second concentration vessel is connected to a centrifuge; the outlet of the centrifuge is connected to a third drying device; and the outlet of the third drying device is connected to an ammonium chloride storage tank.

[0006] As an improved technical solution, the resin column includes a first resin column, a second resin column, a third resin column and a fourth resin column connected in series.

[0007] As an improved technical solution, the enzymatic hydrolysis vessel includes a vessel body, with a feed inlet and a hydrolytic enzyme inlet at the top of the vessel body, an enzymatic hydrolysate outlet at the bottom of the vessel body, a jacket on the outside of the vessel body, and a temperature sensor, a pH sensor, and a rotating shaft inside the vessel body. One end of the rotating shaft is connected to a motor, and multiple stirring plates are provided on the rotating shaft. The temperature sensor and the pH sensor are electrically connected to a controller.

[0008] As an improved technical solution, the first concentration vessel and the second concentration vessel include a vessel body, with a feed inlet and a concentrate outlet respectively at the top and bottom of the vessel body. The vessel body is provided with a jacket on the outside and a rotating shaft inside the vessel body. One end of the rotating shaft is connected to a motor, and multiple stirring rods are provided on the rotating shaft.

[0009] As an improved technical solution, the first filtration device and the second filtration device are plate and frame filters with a filter cloth pore size of 300-500 mesh.

[0010] As an improved technical solution, the chromatographic separation device includes a first chromatographic column, a second chromatographic column, a third chromatographic column and a fourth chromatographic column connected in series. The eluent outlets of the first chromatographic column and the second chromatographic column are respectively connected to phosphate solution delivery pipelines, and the eluent outlets of the third chromatographic column and the fourth chromatographic column are respectively connected to inositol solution delivery pipelines.

[0011] As an improved technical solution, both the first crystallization vessel and the second crystallization vessel include a vessel body. The top and bottom of the vessel body are respectively provided with a feed inlet and a crystal outlet. A liquid outlet is provided on one side of the lower part of the vessel body. The liquid outlet is connected to a crystallization mother liquor conveying pipeline through a vacuum pump. The vessel body is provided with a jacket on the outside and a rotating shaft is provided inside the vessel body. One end of the rotating shaft is connected to a motor. A stirring frame is provided on the rotating shaft, and multiple stirring rods are provided on the stirring frame. A filter screen is provided on the inner wall of the vessel body at a position corresponding to the liquid outlet.

[0012] As an improved technical solution, the first drying device, the second drying device, and the third drying device are double cone dryers.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are:

[0014] The production system for preparing inositol and magnesium ammonium phosphate using corn soaking water and recovering ammonium chloride includes a resin column connected to a corn soaking water supernatant delivery pipeline. The resin column inlet is connected to a desorption agent delivery pipeline, the resin column eluent outlet is connected to a nanofiltration membrane treatment device, the nanofiltration membrane treatment device's retentate outlet is connected to an enzymatic hydrolysis vessel, the enzymatic hydrolysis vessel's outlet is connected to a first filtration device, the first filtration device's filtrate outlet is connected to a first concentration vessel, the first concentration vessel's concentrate outlet is connected to a chromatographic separation device, the chromatographic separation device's eluent outlet is connected to both an inositol solution delivery pipeline and a phosphate solution delivery pipeline, the inositol solution delivery pipeline is connected to a first crystallization vessel, and the first crystallization vessel's crystal outlet is connected to a second crystallization vessel. The inlet of the reactor is connected to the ethanol delivery pipeline; the crystal outlet of the second crystallization reactor is connected to the first drying device; the outlet of the first drying device is connected to the inositol storage tank; the phosphate solution delivery pipeline is connected to the reaction vessel; the inlet of the reaction vessel is connected to the ammonia delivery pipeline; the outlet of the reaction vessel is connected to the second filtration device; the filter residue outlet of the second filtration device is connected to the second drying device; the outlet of the second drying device is connected to the magnesium ammonium phosphate storage tank; the filtrate outlet of the second filtration device is connected to the buffer vessel; the inlet of the buffer vessel is connected to the hydrochloric acid delivery pipeline; the outlet of the buffer vessel is connected to the second concentration vessel; the concentrated liquid outlet of the second concentration vessel is connected to the centrifuge; the outlet of the centrifuge is connected to the third drying device; the outlet of the third drying device is connected to the ammonium chloride storage tank. Under the action of a delivery pump, the supernatant from the corn soaking water delivery pipeline enters the resin column (phytic acid is adsorbed). Ammonium chloride, acting as a eluting agent, enters the resin column along the eluting agent delivery pipeline to elute the phytic acid. The collected eluting solution is then pumped through a pipeline into a nanofiltration membrane treatment device. After concentration, the collected retentate enters the enzymatic hydrolysis tank. The resulting solution after enzymatic hydrolysis enters the first filtration device. The collected filtrate then enters the first concentration tank for concentration. The concentrated solution is then pumped through a pipeline into the chromatographic separation device. Deionized water, acting as the mobile phase, enters the chromatographic separation device for elution. The collected inositol solution is then transported through the inositol solution delivery pipeline. The crystals enter the first crystallization vessel and, after cooling and crystallization, enter the second crystallization vessel. Simultaneously, ethanol, driven by a pump, enters the second crystallization vessel via an ethanol delivery pipeline. After recrystallization, the resulting crystals are conveyed to the first drying unit for drying. Finally, the inositol product is stored in an inositol storage tank. Phosphoric acid collected by the chromatographic separation device after elution is pumped into the reaction vessel via a phosphate solution delivery pipeline. Ammonium dihydrogen phosphate is then added, and ammonia water is introduced to control the pH. After stirring and reacting, the solution is pumped into the second filtration device. The collected filter residue is conveyed to the second drying unit for drying, and the resulting magnesium ammonium phosphate is stored in a magnesium ammonium phosphate storage tank.The filtrate from the second filtration unit enters the buffer tank. Hydrochloric acid, driven by a pump, enters the buffer tank through a hydrochloric acid delivery pipeline. After mixing, it is pumped into the second concentration tank, where it is then centrifuged. The collected crystals are conveyed to the third drying unit for drying and finally stored in an ammonium chloride storage tank. This production system yields high-volume, high-yield, and high-purity inositol and magnesium ammonium phosphate products, and also enables the recovery of ammonium chloride.

[0015] The resin column consists of a first resin column, a second resin column, a third resin column, and a fourth resin column connected in series. This design allows for the full adsorption of phytic acid.

[0016] The enzymatic hydrolysis vessel consists of a vessel body with a feed inlet and a hydrolytic enzyme inlet at the top, and an enzymatic hydrolysate outlet at the bottom. An external jacket surrounds the vessel, while the interior houses a temperature sensor, a pH sensor, and a rotating shaft. One end of the shaft is connected to a motor, and multiple stirring plates are mounted on the shaft. The temperature and pH sensors are electrically connected to a controller. The concentrated solution enters the vessel, and hydrolytic enzymes (phytase and protease) are added. The heat transfer medium in the jacket provides the necessary temperature for the enzymatic hydrolysis reaction, and the pH is controlled. Once the motor starts, it drives the rotating shaft and multiple stirring plates to mix the solution, ensuring thorough contact and reaction between the concentrated solution and the hydrolytic enzymes. The pH and temperature sensors transmit the detected temperature and pH data to the controller. This enzymatic hydrolysis vessel, with its rational design, significantly improves enzymatic hydrolysis efficiency.

[0017] The first and second concentration vessels each consist of a vessel body. The top and bottom of the vessel body are respectively equipped with a feed inlet and a concentrate outlet. The vessel body is fitted with a jacket, and inside the vessel body is a rotating shaft. One end of the rotating shaft is connected to a motor, and multiple stirring rods are mounted on the shaft. The filtrate or reaction liquid enters the vessel body, where the heat medium in the jacket heats and concentrates it. After the motor starts, it drives the rotating shaft and multiple stirring rods to rotate, ensuring that the filtrate or reaction liquid is heated fully and evenly, greatly improving the concentration efficiency.

[0018] The first and second filtration devices are plate and frame filters with a filter cloth pore size of 300-500 mesh. The first filtration device can effectively separate the enzymatic hydrolysis products from impurities; the second filtration device can filter the reaction liquid to achieve solid-liquid separation.

[0019] The chromatographic separation device comprises a first, second, third, and fourth chromatographic column connected in series. The eluent outlets of the first and second columns are connected to phosphate solution delivery pipelines, while the eluent outlets of the third and fourth columns are connected to inositol solution delivery pipelines. The filtrate after enzymatic hydrolysis is concentrated and then fed into the first, second, third, and fourth columns connected in series. Elution is then performed using deionized water (the first, second, third, and fourth columns are disconnected during elution). Based on transmittance data, the phosphate solution eluted from the first and second columns and the inositol solution eluted from the third and fourth columns are collected.

[0020] Since both the first and second crystallization kettles include a kettle body, the top and bottom of the kettle body are respectively provided with a feed inlet and a crystal outlet, and the lower side of the kettle body is provided with a liquid outlet, which is connected to the crystallization mother liquor conveying pipeline through a vacuum pump; the kettle body is provided with a jacket on the outside, and a rotating shaft is provided inside the kettle body, one end of which is connected to a motor, and a stirring frame is provided on the rotating shaft, with multiple stirring rods on the stirring frame; a filter screen is provided on the inner wall of the kettle body at the position corresponding to the liquid outlet. Inositol solution enters the first crystallization vessel. The coolant in the jacket of the first crystallization vessel cools the inositol solution. After the motor starts, it drives the rotating shaft, stirring frame, and multiple stirring rods to rotate and stir the solution, promoting uniform cooling. The mother liquor is discharged through the mother liquor delivery pipeline by a vacuum pump. The crystals then enter the second crystallization vessel. Ethanol enters the vessel through the ethanol delivery pipeline by a delivery pump. The heating medium in the jacket provides the temperature required for recrystallization. After the motor starts, it drives the rotating shaft, stirring frame, and multiple stirring rods to stir and mix the crystal solution. Impurities are incorporated into the ethanol. The inositol crystals enter the next processing equipment, and the mother liquor is discharged through the mother liquor delivery pipeline by a vacuum pump. The first and second crystallization vessels described above are rationally designed, achieving secondary crystallization of inositol and greatly improving crystallization efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water according to this utility model;

[0022] Among them, 1-corn soaking water supernatant delivery pipeline, 2-resin column, 20-first resin column, 21-second resin column, 22-third resin column, 23-fourth resin column, 3-eluent delivery pipeline, 4-nanofiltration membrane treatment equipment, 5-enzymatic hydrolysis vessel, 50-temperature sensor, 51-pH sensor, 52-controller, 6-first filtration device, 7-first concentration vessel, 8-chromatographic separation device, 80-first chromatographic column, 81-second chromatographic column, 82-third chromatographic column, 84-fourth chromatographic column Spectrometer column, 9-Inositol solution delivery pipeline, 10-Phosphate solution delivery pipeline, 11-First crystallization vessel, 12-Second crystallization vessel, 13-Ethanol delivery pipeline, 14-First drying device, 15-Inositol storage tank, 16-Reaction vessel, 17-Ammonia water delivery pipeline, 18-Second filtration device, 19-Second drying device, 20-Magnesium ammonium phosphate storage tank, 21-Buffer vessel, 22-Hydrochloric acid delivery pipeline, 23-Second concentration vessel, 24-Centrifuge, 25-Third drying device, 26-Ammonium chloride storage tank. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] A production system for preparing inositol and magnesium ammonium phosphate using corn soaking water and recovering ammonium chloride, such as Figure 1As shown, the system includes a resin column 2 (comprising a first resin column 20, a second resin column 21, a third resin column 22, and a fourth resin column 23 connected in series, with D315 packing material) connected to a corn soaking water supernatant conveying pipeline 1. The inlet of the resin column 2 is connected to a desorption agent conveying pipeline 3, the outlet of the desorption liquid from the resin column 2 is connected to a nanofiltration membrane treatment device 4, the outlet of the nanofiltration membrane treatment device 4 is connected to an enzymatic hydrolysis vessel 5, and the outlet of the enzymatic hydrolysis vessel 5 is connected to a first filtration device 6 (filter cloth pore size 300-5). (00-mesh plate and frame filter), the filtrate outlet of the first filtration device 6 is connected to the first concentration vessel 7, the concentrate outlet of the first concentration vessel 7 is connected to the chromatographic separation device 8, the eluent outlet of the chromatographic separation device 8 is connected to the inositol solution delivery pipe 9 and the phosphate solution delivery pipe 10 respectively, the inositol solution delivery pipe 9 is connected to the first crystallization vessel 11, the crystal outlet of the first crystallization vessel 11 is connected to the second crystallization vessel 12, the feed inlet of the second crystallization vessel 12 is connected to the ethanol delivery pipe 13, and the crystal outlet of the second crystallization vessel 12 is connected to the first drying... Device 14, the outlet of the first drying device 14 is connected to the inositol storage tank 15; the phosphate solution conveying pipeline 10 is connected to the reaction vessel 16 (including the vessel body, with an inlet and an outlet at the top and bottom of the vessel body respectively, a rotating shaft inside the vessel body, one end of the rotating shaft connected to a motor, and multiple hollow structure stirring plates on the rotating shaft), the inlet of the reaction vessel 16 is connected to the ammonia water conveying pipeline 17, and the outlet of the reaction vessel 16 is connected to the second filtration device 18 (a plate and frame filter with a filter cloth pore size of 300-500 mesh), the second filtration device... The filter residue outlet of device 18 is connected to the second drying device 19, and the outlet of the second drying device 19 is connected to the magnesium ammonium phosphate storage tank 20; the filtrate outlet of the second filtration device 18 is connected to the buffer vessel 21, the inlet of the buffer vessel 21 is connected to the hydrochloric acid conveying pipeline 22, the outlet of the buffer vessel 21 is connected to the second concentration vessel 23, the concentrate outlet of the second concentration vessel 23 is connected to the centrifuge 24 (hanging bag centrifuge), the outlet of the centrifuge 24 is connected to the third drying device 25, and the outlet of the third drying device 25 is connected to the ammonium chloride storage tank 26.

[0025] Under the action of a delivery pump, the supernatant from the corn soaking water delivery pipeline enters the resin column (phytic acid is adsorbed). Ammonium chloride, acting as a eluting agent, enters the resin column along the eluting agent delivery pipeline to elute the phytic acid. The collected eluting solution is then pumped along the pipeline into a nanofiltration membrane treatment device. After concentration, the collected retentate enters the enzymatic hydrolysis tank. The resulting solution after enzymatic hydrolysis enters the first filtration device. The collected filtrate then enters the first concentration tank for concentration. The concentrated solution is then pumped along the pipeline into the chromatographic separation device. Deionized water, acting as the mobile phase, enters the chromatographic separation device for elution. The collected inositol solution is then transported via an inositol solution delivery system. The solution enters the first crystallization vessel via a pipeline. After cooling and crystallization, the crystals then enter the second crystallization vessel. Simultaneously, ethanol, driven by a pump, enters the second crystallization vessel via an ethanol delivery pipeline. After recrystallization, the resulting crystals are conveyed to the first drying unit for drying. Finally, the inositol product is stored in an inositol storage tank. Phosphoric acid collected by the chromatographic separation unit after elution is pumped into the reaction vessel via a phosphate solution delivery pipeline. Ammonium dihydrogen phosphate is then added, and ammonia water is introduced to control the pH. After stirring and reacting, the solution is pumped into the second filtration unit. The collected filter residue is conveyed into the second drying unit, and the resulting magnesium ammonium phosphate is stored in a magnesium ammonium phosphate storage tank. The filtrate from the second filtration unit enters the buffer vessel. Hydrochloric acid, driven by a pump, enters the buffer vessel via a hydrochloric acid delivery pipeline. After stirring and mixing, it is pumped into the second concentration vessel, where it is centrifuged. The collected crystals are conveyed to the third drying unit for drying and finally stored in an ammonium chloride storage tank. The above production system can produce high-yield, high-purity inositol and magnesium ammonium phosphate products, and also enables the recovery of ammonium chloride.

[0026] The enzymatic hydrolysis vessel 5 includes a vessel body with a feed inlet and a hydrolytic enzyme inlet at the top, and an enzymatic hydrolysate outlet at the bottom. The vessel body is surrounded by a jacket. Inside the vessel body are a temperature sensor 50, a pH sensor 51, and a rotating shaft. One end of the rotating shaft is connected to a motor, and multiple stirring plates are mounted on the shaft. The temperature and pH sensors are electrically connected to a controller 52. The concentrated solution enters the vessel body, and hydrolytic enzymes (phytase and protease) are added. The heating medium in the jacket provides the temperature required for the enzymatic hydrolysis reaction, and the pH is controlled. After the motor starts, it drives the rotating shaft and multiple stirring plates to stir and mix the solution, ensuring sufficient contact and reaction between the concentrated solution and the hydrolytic enzymes. The pH and temperature sensors transmit the detected temperature and pH data to the controller. This enzymatic hydrolysis vessel, with its rational design, significantly improves enzymatic hydrolysis efficiency.

[0027] The first concentration vessel 7 and the second concentration vessel 23 each include a vessel body. The top and bottom of the vessel body are respectively provided with a feed inlet and a concentrate outlet. The vessel body is equipped with a jacket, and inside the vessel body is a rotating shaft. One end of the rotating shaft is connected to a motor, and multiple stirring rods are mounted on the shaft. The filtrate or reaction liquid enters the vessel body, and the heat medium in the jacket heats and concentrates it. After the motor starts, it drives the rotating shaft and multiple stirring rods to rotate, ensuring that the filtrate or reaction liquid is fully and evenly heated, greatly improving the concentration efficiency.

[0028] The chromatographic separation device 8 includes a first chromatographic column 80, a second chromatographic column 81, a third chromatographic column 82, and a fourth chromatographic column 83 connected in series (the packing material for all four columns is D001). The eluent outlets of the first chromatographic column 80 and the second chromatographic column 81 are respectively connected to the phosphate solution delivery pipe 10, and the eluent outlets of the third chromatographic column 82 and the fourth chromatographic column 83 are respectively connected to the inositol solution delivery pipe 9. The filtrate after the enzymatic hydrolysis reaction is concentrated and then fed into the first, second, third, and fourth chromatographic columns connected in series. Then, deionized water is used for elution (the first, second, third, and fourth chromatographic columns are disconnected during elution). The phosphate solution eluted from the first and second chromatographic columns and the inositol solution eluted from the third and fourth chromatographic columns are collected based on the transmittance data.

[0029] The first crystallization vessel 11 and the second crystallization vessel 12 both include a vessel body. The top and bottom of the vessel body are respectively provided with a feed inlet and a crystal outlet. The lower side of the vessel body is provided with a liquid outlet, which is connected to the crystallization mother liquor conveying pipeline through a vacuum pump. The vessel body is provided with a jacket on the outside and a rotating shaft is provided inside the vessel body. One end of the rotating shaft is connected to a motor. A stirring frame is provided on the rotating shaft, and multiple stirring rods are provided on the stirring frame. A filter screen is provided on the inner wall of the vessel body at the position corresponding to the liquid outlet. Inositol solution enters the first crystallization vessel. The coolant in the jacket of the first crystallization vessel cools the inositol solution. After the motor starts, it drives the rotating shaft, stirring frame, and multiple stirring rods to rotate and stir the solution, promoting uniform cooling. The mother liquor is discharged through the mother liquor delivery pipeline by a vacuum pump. The crystals then enter the second crystallization vessel. Ethanol enters the vessel through the ethanol delivery pipeline by a delivery pump. The heating medium in the jacket provides the temperature required for recrystallization. After the motor starts, it drives the rotating shaft, stirring frame, and multiple stirring rods to stir and mix the crystal solution. Impurities are incorporated into the ethanol. The inositol crystals enter the next processing equipment, and the mother liquor is discharged through the mother liquor delivery pipeline by a vacuum pump. The first and second crystallization vessels described above are rationally designed, achieving secondary crystallization of inositol and greatly improving crystallization efficiency.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water, characterized in that, The apparatus includes a resin column connected to a pipeline for conveying the supernatant from corn soaking water; the inlet of the resin column is connected to a pipeline for conveying an eluent; the outlet of the resin column is connected to a nanofiltration membrane treatment device; the outlet of the nanofiltration membrane treatment device is connected to an enzymatic hydrolysis vessel; the outlet of the enzymatic hydrolysis vessel is connected to a first filtration device; the outlet of the first filtration device is connected to a first concentration vessel; the outlet of the first concentration vessel is connected to a chromatographic separation device; the eluent outlet of the chromatographic separation device is connected to both an inositol solution delivery pipeline and a phosphate solution delivery pipeline; the inositol solution delivery pipeline is connected to a first crystallization vessel; the crystal outlet of the first crystallization vessel is connected to a second crystallization vessel; the inlet of the second crystallization vessel is connected to an ethanol delivery pipeline; the crystal outlet of the second crystallization vessel is connected to a first drying device; the outlet of the first drying device is connected to an inositol storage tank; the phosphate solution delivery pipeline is connected to a reaction vessel; the inlet of the reaction vessel is connected to an ammonia water delivery pipeline; the outlet of the reaction vessel is connected to a second filtration device; the filter residue outlet of the second filtration device is connected to a second drying device; and the outlet of the second drying device is connected to a magnesium ammonium phosphate storage tank. The filtrate outlet of the second filtration device is connected to a buffer vessel, the inlet of the buffer vessel is connected to a hydrochloric acid delivery pipeline, the outlet of the buffer vessel is connected to a second concentration vessel, the concentrate outlet of the second concentration vessel is connected to a centrifuge, the outlet of the centrifuge is connected to a third drying device, and the outlet of the third drying device is connected to an ammonium chloride storage tank.

2. The production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water according to claim 1, characterized in that, The resin column comprises a first resin column, a second resin column, a third resin column, and a fourth resin column connected in series.

3. The production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water according to claim 1, characterized in that, The enzymatic hydrolysis vessel includes a vessel body, with a feed inlet and a hydrolytic enzyme inlet at the top of the vessel body, and an enzymatic hydrolysate outlet at the bottom of the vessel body. The vessel body is equipped with a jacket on the outside, and a temperature sensor, a pH sensor, and a rotating shaft are installed inside the vessel body. One end of the rotating shaft is connected to a motor, and multiple stirring plates are installed on the rotating shaft. The temperature sensor and the pH sensor are electrically connected to a controller.

4. The production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water according to claim 1, characterized in that, The first and second concentration vessels each include a vessel body. The top and bottom of the vessel body are respectively provided with a feed inlet and a concentrate outlet. The vessel body is provided with a jacket on the outside and a rotating shaft is provided inside the vessel body. One end of the rotating shaft is connected to a motor, and multiple stirring rods are provided on the rotating shaft.

5. A production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water according to claim 1, characterized in that, The first and second filtration devices are plate and frame filters with a filter cloth pore size of 300-500 mesh.

6. The production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water according to claim 1, characterized in that, The chromatographic separation device includes a first chromatographic column, a second chromatographic column, a third chromatographic column, and a fourth chromatographic column connected in series. The eluent outlets of the first and second chromatographic columns are respectively connected to phosphate solution delivery pipelines, and the eluent outlets of the third and fourth chromatographic columns are respectively connected to inositol solution delivery pipelines.

7. A production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water according to claim 1, characterized in that, Both the first and second crystallization vessels include a vessel body. The top and bottom of the vessel body are respectively provided with a feed inlet and a crystal outlet. A liquid outlet is provided on one side of the lower part of the vessel body. The liquid outlet is connected to a crystallization mother liquor conveying pipeline through a filtration pump. The vessel body is provided with a jacket on the outside and a rotating shaft is provided inside the vessel body. One end of the rotating shaft is connected to a motor. A stirring frame is provided on the rotating shaft, and multiple stirring rods are provided on the stirring frame. A filter screen is provided on the inner wall of the vessel body at a position corresponding to the liquid outlet.

8. A production system for preparing inositol and magnesium ammonium phosphate and recovering ammonium chloride using corn soaking water according to claim 1, characterized in that, The first drying device, the second drying device, and the third drying device are double cone dryers.

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