Industrial dechlorination system and method for preparing alpha gypsum by hydrothermal method

Abstract

The application belongs to the field of chlorine removal process, and specifically discloses an industrial dechlorination system and method for preparing alpha gypsum by a hydrothermal method. The system comprises a gypsum production assembly, a wastewater dechlorination assembly, a sedimentation tank and a water quality parameter monitoring control assembly. The gypsum production assembly is composed of a raw material tank, a dosing tank, a blending unit, a reaction unit and a separation unit, and realizes the finishing of products; the wastewater dechlorination assembly is composed of a heat exchanger, a dechlorination tank, a dosing device, a first Cl ‑ monitor, a pH monitor and a second Cl ‑ monitor, and realizes the water quality adjustment and dechlorination of the chlorine-containing waste liquid. The water quality parameter monitoring control assembly is composed of a first Cl 2+ monitor, a Ca 2+ monitor and a second Cl 2+ monitor, and is used for controlling the dosing amount of the raw material tank and the dosing tank. The industrial dechlorination system for preparing alpha gypsum by the hydrothermal method realizes the dechlorination treatment of the desulfurized gypsum, and can be used for industrial production, and overcomes the problems of high cost and incomplete dechlorination of the desulfurized gypsum in the industrial application of the prior art.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of chlorine removal process, and particularly relates to an industrial dechlorination system and method for preparing alpha gypsum by a hydrothermal method. BACKGROUND

[0002] With the encouragement and support of the state for the comprehensive utilization of industrial by-product gypsum, the resource utilization of desulfurization gypsum has become an important way to reduce pollution and protect the environment. Desulfurization gypsum is a by-product produced in the flue gas desulfurization process of coal-fired power plants, and the control of the content of chloride ions therein is of great significance for reducing environmental pollution. By reducing the content of chloride ions, the utilization value of desulfurization gypsum can be improved, and its application in green building materials and gypsum whisker new products and new materials can be promoted.

[0003] The chloride ions in desulfurization gypsum mainly come from chlorine in coal and chloride ions in process water. Due to the repeated use of industrial water and process water in the desulfurization system, chloride ions gradually accumulate in the slurry in the absorption tower, resulting in a continuous increase in the concentration of chloride ions, and even a serious over-standard. High content of chloride ions can cause problems such as moisture return, sagging and yellowing of gypsum products, and also cause strong corrosion, which seriously affects the normal operation of the desulfurization system. Reducing the content of chloride ions in gypsum can improve the dehydration effect of gypsum and promote the stability of gypsum quality, so reducing the content of chloride ions in desulfurization gypsum is of great importance to environmental protection and the utilization rate of gypsum.

[0004] The prior art generally cannot solve the technical problem of high chlorine content in desulfurization gypsum. The traditional method is to modify the existing desulfurization equipment, such as replacement and modification of vacuum belt dewatering machines and desulfurization water sources, but these modifications will increase the operating cost of enterprises, and the chlorine removal is not complete, which is not conducive to large-scale chlorine removal of desulfurization gypsum. The further improved normal pressure salt solution method, normal pressure alcohol water method and microwave dehydration method are currently still in the laboratory stage and need to be further optimized before they can be realized for industrial production. SUMMARY

[0005] In view of the above technical problems in the prior art, the application provides an industrial dechlorination system and method for preparing alpha gypsum by a hydrothermal method. The industrial dechlorination system for preparing alpha gypsum by a hydrothermal method comprises a gypsum production assembly, a wastewater dechlorination assembly, a sedimentation tank and a water quality parameter monitoring and control assembly. The dechlorination treatment of desulfurization gypsum is realized by using the wastewater dechlorination assembly, the sedimentation tank and the water quality parameter monitoring and control assembly, and industrial production can be carried out, overcoming the problems of high cost and incomplete chlorine removal of desulfurization gypsum in the industrial application of the prior art.

[0006] To achieve the above object, the following technical solutions are adopted in the application:

[0007] An industrial dechlorination system for preparing alpha gypsum by a hydrothermal method comprises:

[0008] The gypsum production assembly includes a dosing tank, a raw material tank, a preparation unit, a reaction unit and a separation unit, mixing is carried out in the preparation unit, a stirrer for promoting mixing is arranged in the preparation unit, reaction is carried out in the reaction unit, the reaction unit adopts a high-pressure inner-outer jacketed reactor with the application number CN202420246778.X, solid-liquid separation is carried out in the separation unit, a filter screen for solid-liquid separation is arranged in the separation unit, the preparation unit, the reaction unit and the separation unit are sequentially and throughly connected, and the raw material tank and the dosing tank are throughly connected with the preparation unit.

[0009] The wastewater chlorine removal assembly includes a heat exchanger, a first Cl - monitor, a chlorine removal tank, a dosing device and a pH monitor, the chlorine removal tank is provided with a stirrer, the raw material tank, the separation unit and the dosing device are throughly connected to the chlorine removal tank, the heat exchanger is arranged between the separation unit and the chlorine removal tank, the first Cl - monitor is arranged between the heat exchanger and the chlorine removal tank, and the pH monitor is installed at the outlet end of the chlorine removal tank; the heat exchanger can utilize the waste heat of the high-temperature chlorine-containing wastewater discharged from the separation unit, and obtain low-temperature wastewater, the low-temperature wastewater enters the chlorine removal tank, the outlet of the heat exchanger is connected with the chlorine removal tank; a first Cl - monitor is further arranged on the connecting passage between the heat exchanger and the chlorine removal tank. - The pH monitor is connected with the chlorine removal tank, the dosing amount of the dosing device is adjusted through the detection result of the pH monitor, and the outlet of the dosing device is connected with the chlorine removal tank.

[0010] The first Cl - monitor and the first valve are electrically connected; if the monitoring result of the first Cl monitor is higher than the upper limit of the chlorine ion concentration, the wastewater is directly discharged from the first valve without chlorine removal in the chlorine removal tank; if the monitoring result of the first Cl monitor is lower than the upper limit of the chlorine ion concentration, the wastewater enters the chlorine removal tank for chlorine removal.

[0011] The sedimentation tank is throughly connected with the chlorine removal tank, and the wastewater discharged from the chlorine removal tank is transported to the sedimentation tank for settlement treatment.

[0012] The water quality parameter monitoring control assembly includes a second Cl - monitor and a Ca 2+ monitor, the second Cl - monitor and the Ca 2 + monitor is connected to the outlet end of the sedimentation tank, and the sedimentation tank is throughly connected to the inlet end of the preparation unit, the aluminum salt in the dosing tank and the calcium salt in the raw material tank can be left in the supernatant after precipitation in the sedimentation tank, and the rest is monitored and then enters the preparation unit.

[0013] A feeder is arranged between the raw material tank and the dechlorination tank, the outlet of the raw material tank is connected with the inlet of the feeder, the outlet of the feeder is connected with the dechlorination tank, Ca 2+ The monitor is electrically connected with the feeder, Ca 2+ The monitor obtains the Ca 2+ After obtaining the concentration, the flow of the feeder is regulated, and then the amount of by-product gypsum supplied to the dechlorination tank through the raw material tank is regulated. The outlet end of the dosing tank, the dispensing unit and the dechlorination tank are connected through a distributor, a second chloride ion monitor is electrically connected with the distributor, and a second Cl - The monitor obtains the Cl - After obtaining the concentration, the distribution amount of the distributor is regulated, and then the amount of aluminum sulfate supplied to the dechlorination tank through the dosing tank is regulated.

[0014] Further, the dosing tank stores a crystal control agent, the crystal control agent controls the crystal transformation and obtains alpha gypsum, the raw material tank stores by-product gypsum, the by-product gypsum is desulfurization gypsum, the main component of the desulfurization gypsum is calcium sulfate, and the crystal control agent and the by-product gypsum react in the reaction unit.

[0015] Further, the dosing device stores an alkaline substance or sulfuric acid for adjusting pH, and the alkaline substance or sulfuric acid is discharged into the dechlorination tank to adjust the pH of the cooling wastewater to be alkaline.

[0016] Further, a discharger is installed on the sedimentation tank, and calcium chloroaluminate is discharged through the discharger.

[0017] Further, a ball valve is arranged between the sedimentation tank and the inlet of the gypsum hydrothermal conversion unit, the outlet of the sedimentation tank is connected to the inlet of the dispensing unit through the ball valve, and the reuse of supernatant is realized.

[0018] Further, when the sedimentation tank is connected to the inlet end of the dispensing unit, heat exchange is carried out in the heat exchanger first, and the waste heat is utilized to heat the supernatant transported in the sedimentation tank.

[0019] Further, a second valve and a material pump are arranged between the pH monitor and the sedimentation tank, the outlet of the dechlorination tank is connected to the sedimentation tank through the valve and the material pump, the outlet of the sedimentation tank is connected with the discharger, and the other outlet of the sedimentation tank is connected to the second Cl - monitor and Ca 2+ monitor.

[0020] Further, the separation unit is also connected with a post-treatment unit, and the post-treatment unit collects alpha gypsum.

[0021] The present application also protects the method of the industrial dechlorination system for preparing alpha gypsum by the above-mentioned hydrothermal method, which comprises the following steps:

[0022] Before the system is started: all valves and dosing devices are in the closed state.

[0023] When the system is running, the by-product gypsum in the raw material tank and the crystal control agent in the dosing tank are jointly added into the preparation unit for mixing, and then are transported into the reaction unit for reaction to obtain alpha gypsum and chlorine-containing wastewater, and then the solid-liquid separation is carried out in the separation unit, and the alpha gypsum is transported into the post-processing unit.

[0024] The high-temperature chlorine-containing wastewater enters into the heat exchanger for heat exchange to obtain low-temperature wastewater, the low-temperature wastewater enters into the dechlorination tank, and the by-product gypsum is supplemented into the dechlorination tank through the raw material tank, and the aluminum sulfate is supplemented into the dechlorination tank through the dosing tank, and the dechlorination reaction is carried out to obtain dechlorination wastewater.

[0025] At the same time, the alkaline substance or sulfuric acid in the dosing device is discharged into the dechlorination tank for pH adjustment, and the amount of the alkaline substance or sulfuric acid is monitored according to the pH monitor.

[0026] The dechlorination wastewater is transported into the sedimentation tank for sedimentation, and the supernatant is discharged into the preparation unit, and the amount of the by-product gypsum supplemented into the dechlorination tank through the raw material tank is adjusted according to the Ca 2+ The transport amount of the feeder is adjusted according to the calcium ion detection result of the monitor, and then the amount of the by-product gypsum supplemented into the dechlorination tank through the raw material tank is regulated. The second Cl - The distribution amount of the distributor is adjusted according to the chlorine ion monitoring result of the monitor, and then the amount of the aluminum sulfate supplemented into the dechlorination tank through the dosing tank is regulated.

[0027] System shutdown: the raw material tank, the dosing tank, the preparation unit, the reaction unit, the separation unit and the heat exchanger are closed, and the wastewater supply is stopped; the dosing device, the distributor, the first valve, the feeder and the material pump are closed; the second valve, the ball valve and the discharger are closed, and the sludge and the supernatant are stopped.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] 1、The industrial dechlorination system for preparing alpha gypsum by a hydrothermal method comprises a gypsum production assembly, a wastewater dechlorination assembly, a sedimentation tank and a water quality parameter monitoring and control assembly. Desulfurized gypsum is used as raw material, and the gypsum production assembly is used to prepare alpha gypsum, and chlorine-containing wastewater is obtained at the same time, so that the desulfurized gypsum is dechlorinated and the alpha gypsum which can be used secondarily is obtained. In the wastewater dechlorination assembly, the desulfurized gypsum is used to treat the chlorine-containing wastewater, and pH adjustment is carried out to obtain dechlorination wastewater. After the dechlorination wastewater is precipitated in the sedimentation tank, the supernatant is discharged into the water quality parameter monitoring and control assembly, and the Ca 2+ The transport amount of the feeder is adjusted according to the calcium ion detection result of the monitor, and then the amount of the by-product gypsum supplemented into the dechlorination tank through the raw material tank is regulated. The second Cl -The monitor controls the distribution amount of the distributor, and then controls the supplement amount of aluminum sulfate in the chlorine-containing wastewater; the precipitate is discharged through the discharger, and the industrial dechlorination system for preparing alpha gypsum by the hydrothermal method realizes dechlorination of desulfurization gypsum and industrial production, the dechlorination process uses desulfurization gypsum as raw material, the cost is effectively reduced, and the dechlorination is complete.

[0030] 2, if Ca 2+ If the monitoring result of the monitor does not reach the set value of the calcium ion concentration, the conveying amount of the feeder is increased, and calcium sulfate is supplemented. 2+ If the monitoring result of the monitor reaches or exceeds the set value of the calcium ion concentration, the conveying of the feeder is stopped.

[0031] 3, if the second Cl - If the chlorine ion concentration of the monitor is large, the amount of aluminum sulfate delivered by the distributor to the dechlorination tank is increased, and the delivery amount to the blending unit is reduced; if the second Cl - If the chlorine ion concentration of the monitor reaches the requirement, the delivery of aluminum sulfate by the distributor to the dechlorination tank is stopped, and the remaining aluminum sulfate enters the blending unit.

[0032] 4, the precipitate of the sedimentation tank is discharged through the discharger, and the supernatant contains calcium salt and aluminum salt, which returns to the gypsum production assembly again, the supernatant enters the blending unit through the ball valve, realizes the reuse of the supernatant after wastewater dechlorination, and reduces the supply of clean water.

[0033] 5, the dosing device in the wastewater dechlorination assembly stores alkaline substances or sulfuric acid for adjusting pH, the pH in the dechlorination tank can be monitored by the pH monitor, the dosing amount supplemented by the dosing device into the dechlorination tank is adjusted, so that the pH of the wastewater reaches 7.0-8.0.

[0034] 6, a heat exchanger is arranged between the separation unit and the dechlorination tank, the temperature of the high-temperature wastewater is reduced after entering the heat exchanger, and the low-temperature wastewater enters the dechlorination tank for dechlorination; the excess heat in the high-temperature wastewater can heat the supernatant conveyed in the sedimentation tank through the heat exchanger, reducing energy loss.

[0035] 7, the industrial dechlorination system for preparing alpha gypsum by the hydrothermal method comprises a gypsum production assembly, a wastewater dechlorination assembly, a sedimentation tank and a water quality parameter monitoring and control assembly, and the Ca 2+ monitor, the first Cl - monitor, the second Cl - monitor and the pH monitor are arranged, so that the accurate control of the feeding amount is realized, the complete removal of chlorine is ensured, and the waste of materials is avoided. The heat exchanger reduces the temperature of the high-temperature wastewater, realizes the effective utilization of the excess heat, and reduces the operation cost. In addition, the supernatant in the sedimentation tank enters the gypsum production assembly, realizes the reuse of the supernatant, and reduces the supply amount of clean water. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is the overall structure schematic diagram of the industrial dechlorination system for preparing alpha gypsum by the hydrothermal method of the present application.

[0037] Wherein: 1 - raw material tank; 2 - dosing tank; 3 - dosing device; 4 - deployment unit; 5 - reaction unit; 6 - separation unit; 7 - heat exchanger; 8 - dechlorination tank; 9 - sedimentation tank; 10 - post-processing unit; 11 - distributor; 12 - material feeder; 13 - first Cl - monitor; 14 - first valve; 15 - pH monitor; 16 - second valve; 17 - material pump; 18 - material discharger; 19 - second Cl - monitor; 20 - Ca 2+ monitor; 21 - ball valve. DETAILED DESCRIPTION

[0038] The specific embodiments of the present application are described in detail below, but it should be understood that the scope of protection of the present application is not limited by the specific embodiments. Based on the examples in the present application, all other examples obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application. The experimental methods described in the embodiments of the present application are conventional methods unless otherwise specified.

[0039] In view of the technical defect of high chlorine content in the existing desulfurization gypsum, the present application provides an industrial dechlorination system for preparing alpha gypsum by a hydrothermal method, so as to realize dechlorination of desulfurization gypsum and obtain alpha gypsum capable of being reused. In the present application, a subcritical hydrothermal conversion method is proposed, so that the calcium sulfate dihydrate in the desulfurization gypsum dissolves and recrystallizes in the aqueous solution. This process continuously generates alpha calcium sulfate hemihydrate, and at the same time, the chlorine ions and other impurities originally wrapped in the calcium sulfate dihydrate are released in the process of dissolution, so as to achieve the effect of green dechlorination and quality improvement. Moreover, after the chlorine ions in the chlorine-containing wastewater are removed by the desulfurization gypsum, the calcium salt in the supernatant is beneficial to the production of gypsum and is reused in the water for gypsum production, thereby reducing resource loss and industrial operation cost, and having important significance for reducing production investment.

[0040] The industrial dechlorination system for preparing alpha gypsum by the hydrothermal method of the present application and the process based on the industrial dechlorination system for preparing alpha gypsum by the hydrothermal method are described in detail as follows:

[0041] The industrial dechlorination system for preparing alpha gypsum by the hydrothermal method, as shown in Figure 1 , comprises:

[0042] The gypsum production assembly comprises a raw material tank 1, a dosing tank 2, a preparation unit 4, a reaction unit 5 and a separation unit 6, the preparation unit 4, the reaction unit 5 and the separation unit 6 are sequentially and throughly connected, the raw material tank 1 and the dosing tank 2 are throughly connected with the preparation unit 4, the dosing tank 2 stores a crystal control agent, the raw material tank 1 stores by-product gypsum, a basic substance or sulfuric acid for adjusting pH is stored in a dosing device 3, and a post-treatment unit 10 is further connected to the separation unit 6.

[0043] The wastewater chlorine removal assembly comprises a heat exchanger 7, a first Cl - A monitor 13, a chlorine removal tank 8, the dosing device 3 and a pH monitor 15, the raw material tank 1, the separation unit 6 and the dosing device 3 are throughly connected to the chlorine removal tank 8, the heat exchanger 7 is arranged between the separation unit 6 and the chlorine removal tank 8, the first Cl - The monitor 13 is arranged between the heat exchanger 7 and the chlorine removal tank 8, and the pH monitor 15 is arranged at an outlet end of the chlorine removal tank 8.

[0044] The first Cl - A first valve 14 is further arranged on a bypass between the monitor 13 and the chlorine removal tank 8, the first Cl - The monitor 13 and the first valve 14 are electrically connected.

[0045] A sedimentation tank 9 is throughly connected with the chlorine removal tank 8, a second valve 16 and a material pump 17 are arranged between the chlorine removal tank 8 and the sedimentation tank 9, and a material discharger 18 is further arranged on the sedimentation tank 9.

[0046] The water quality parameter monitoring and control assembly comprises a second Cl - A monitor 19 and a Ca 2+ Monitor 20, the second Cl - Monitor 19 and a Ca 2+ The monitor 20 is connected to an outlet end of the sedimentation tank 9, the sedimentation tank 9 is throughly connected to an inlet end of the preparation unit 4, a ball valve 21 is arranged between the sedimentation tank 9 and the inlet end of the preparation unit 4, when the sedimentation tank 9 is throughly connected to the inlet end of the preparation unit 4, heat exchange in the heat exchanger 7 is first, and pipelines are arranged between the sedimentation tank 9 and the heat exchanger 7 and between the heat exchanger 7 and the preparation unit 4.

[0047] A material feeder 12 is arranged between the raw material tank 1 and the chlorine removal tank 8, the Ca 2+ The monitor 20 is further electrically connected with the material feeder 12. The outlet end of the dosing tank 2, the preparation unit 4 and the chlorine removal tank 8 are connected through a distributor 11, the second Cl - The monitor 19 and the distributor 11 are electrically connected.

[0048] Embodiment 1

[0049] The method is based on an industrial dechlorination system for preparing alpha gypsum by a hydrothermal method, as shown inFigure 1 , comprising the following steps:

[0050] At the initial stage of starting the industrial dechlorination system for preparing alpha gypsum based on the hydrothermal method, ensure that the first valve 14, the discharger 18, the ball valve 21, the distributor 11, the second valve 16, the material feeder 12 and the material pump 17 are all in the closed state, and the dosing device 3, the blending unit 4, the reaction unit 5, the separation unit 6 and the heat exchanger 7 are also all in the closed state.

[0051] When starting the industrial dechlorination system for preparing alpha gypsum based on the hydrothermal method, first make the by-product gypsum in the raw material tank 1 and the crystal control agent in the dosing tank 2 enter the blending unit 4 for mixing, then enter the reaction unit 5 for sufficient reaction, and then enter the separation unit 6 for separation, to obtain alpha gypsum and chlorine-containing wastewater, and deliver the alpha gypsum to the post-processing unit 10.

[0052] The high-temperature chlorine-containing wastewater enters the heat exchanger 7 for heat exchange, and low-temperature wastewater is obtained, and the excess heat after heat exchange is used to heat the supernatant of the backflow of the sedimentation tank 9. The low-temperature wastewater enters the dechlorination tank 8, the pH monitor 15 monitors the pH of the low-temperature wastewater, and the addition amount of the alkaline substance or sulfuric acid of the dosing device 3 is adjusted, so that the pH of the low-temperature wastewater reaches 7.0-8.0.

[0053] The main component of the by-product gypsum is calcium sulfate, and the low-temperature wastewater enters the dechlorination tank 8 and is fully reacted by the stirrer, so that the chlorine is effectively and completely removed, and dechlorination wastewater is obtained.

[0054] The second valve 16 and the material pump 17 are opened, the dechlorination wastewater is delivered to the sedimentation tank 9 for sedimentation, the supernatant and the precipitate are obtained, the discharger 18 is opened to discharge the sludge, and the supernatant is delivered to the blending unit 4 through the ball valve 21, and the addition amount of the dosing device 3 to the dechlorination tank 8 is adjusted according to the monitoring result of the Ca 2+ monitor 20 on the Ca 2+ content in the supernatant. The addition amount of the material feeder 12 to the dechlorination tank 8 is adjusted according to the monitoring result of the second Cl - monitor 19 on the Cl - content in the supernatant.

[0055] The adjustment means during the normal operation of the industrial dechlorination system for preparing alpha gypsum based on the hydrothermal method are as follows: a, if the monitoring result of the first Cl - monitor 13 is higher than the upper limit of the chlorine ion concentration, the wastewater is directly discharged from the first valve 14 without dechlorination in the dechlorination tank; if the monitoring result of the first Cl -If the monitoring result of the monitor 13 is lower than the upper limit of the chloride ion concentration, the wastewater enters the dechlorination tank 8 for dechlorination.b. If the pH value of the low-temperature wastewater is too high, the amount of sulfuric acid added in the dosing device 3 is increased; if the pH value of the wastewater is too low, the amount of sodium hydroxide added in the dosing device 3 is increased.c. If the calcium ion concentration of the supernatant of the precipitation tank 9 is too low, the amount of the dosing device 12 is increased; if the calcium ion concentration of the supernatant of the precipitation tank 9 reaches or is higher than the set value, the dosing device 12 is closed.d. If the chloride ion concentration of the supernatant of the precipitation tank 9 is too high, the amount of aluminum sulfate delivered by the distributor 11 to the dechlorination tank 8 is increased, and the amount delivered to the blending unit 4 is decreased; if the chloride ion concentration of the supernatant of the precipitation tank 9 reaches the requirement, the delivery of aluminum sulfate by the distributor 11 to the dechlorination tank 8 is stopped, and the remaining aluminum sulfate enters the blending unit 4.

[0056] After the industrial dechlorination system based on the hydrothermal method for preparing alpha gypsum receives a shutdown instruction, the raw material tank 1, the dosing tank 2, the blending unit 4 and the heat exchanger 7 are sequentially closed, the wastewater supply is stopped, the dosing device 12 is closed, the addition of desulfurized gypsum is stopped, the distributor 11 is closed, the addition of crystal control agent is stopped, the dosing device 3 is automatically closed under the control of the pH monitor 15 after adding alkaline substances or sulfuric acid, the calcium salt and aluminum salt in the dechlorination tank 8 are fully stirred with the wastewater to react and enter the precipitation tank 9, the material pump 17 and the second valve 16 are closed after the dechlorination tank 8 is completely emptied. After the supernatant in the precipitation tank 9 enters the blending unit 4, the ball valve 21 is closed, and the discharger 18 is opened to discharge the sludge. After the sludge is completely discharged, the discharger 18 is closed.

[0057] The above content only illustrates the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made according to the technical idea of the present application on the basis of the technical solution falls within the protection scope of the claims of the present application.

Claims

1. A hydrothermal method for preparing α-gypsum in an industrial dechlorination system, characterized in that, The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. A wastewater chlorine removal assembly comprising a heat exchanger (7), a first Cl - a monitor (13), a chlorine removal tank (8), a dosing device (3) and a pH monitor (15), said raw material tank (1), said separation unit (6) and said dosing device (3) being connected in series to said chlorine removal tank (8), said heat exchanger (7) being arranged between said separation unit (6) and said chlorine removal tank (8), said first Cl - monitor (13) being arranged between said heat exchanger (7) and chlorine removal tank (8), said pH monitor (15) being arranged at the outlet end of said chlorine removal tank (8); said first Cl - A first valve (14) is arranged on the bypass between the monitor (13) and the chlorine removal tank (8). - The monitor (13) is electrically connected with the first valve (14). The application relates to a gypsum production assembly. a water quality parameter monitoring control assembly comprising a second Cl - a monitor (19) and Ca 2+ a monitor (20), said second Cl - a monitor (19) and said Ca 2+ a monitor (20) is connected to the outlet end of said sedimentation tank (9), and said sedimentation tank (9) is connected through to the inlet end of said dispensing unit (4); The raw material tank (1) is provided with a feeder (12) between the raw material tank (1) and the chlorine removal tank (8), and the Ca 2+ A monitor (20) is electrically connected with the feeder (12); the outlet end of the dosing tank (2), the distribution unit (4) and the chlorine removal tank (8) are connected through a distributor (11), and the second Cl - A monitor (19) is electrically connected with the distributor (11).

2. The industrial dechlorination system for the hydrothermal preparation of alpha gypsum according to claim 1, characterized in that, The application relates to a gypsum production assembly.

3. The industrial dechlorination system for hydrothermally preparing α gypsum according to claim 2, characterized by, The application relates to a gypsum production assembly.

4. The industrial dechlorination system for hydrothermally preparing α gypsum according to claim 3, characterized by, The application relates to a gypsum production assembly.

5. The industrial dechlorination system for hydrothermally preparing α gypsum according to claim 4, characterized by, The application relates to a gypsum production assembly.

6. The industrial dechlorination system for hydrothermally preparing α gypsum according to claim 5, characterized by, The application relates to a gypsum production assembly.

7. The industrial dechlorination system for hydrothermally preparing high-strength α gypsum according to claim 6, characterized by, The application relates to a gypsum production assembly.

8. The industrial dechlorination system for hydrothermally preparing high-strength α gypsum according to claim 7, characterized by, The application relates to a gypsum production assembly.

9. A method for the industrial dechlorination of α-gypsum based on the hydrothermal process according to claim 8, characterized in that, The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The chlorine-removed wastewater is transported into the sedimentation tank (9) for sedimentation, the supernatant is discharged into the distribution unit (4), and the Ca 2+ The monitor (20) adjusts the feeding amount of the feeder (12) according to the detection result of the calcium ions in the supernatant, thereby regulating the amount of by-product gypsum supplemented to the chlorine-removal tank (8) from the raw material tank (1); the second Cl - The monitor (19) adjusts the distribution amount of the distributor (11) according to the detection result of the chlorine ions in the supernatant, thereby regulating the amount of aluminum sulfate supplemented to the chlorine-removal tank (8) from the dosing tank (2).

10. The method of claim 9, wherein, The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. The application relates to a gypsum production assembly. 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