Method for producing ammonium sulfate and calcium carbonate by using carbon dioxide mineralized gypsum in a continuous production device

Abstract

The application discloses a production method of a device for continuously producing ammonium sulfate and calcium carbonate by carbon dioxide mineralization of gypsum, which comprises a spray tower reaction device and a multistage kettle type reaction device. The spray tower reaction device comprises, from bottom to top, a reaction tank, a first absorption zone, a second absorption zone and a third absorption zone. The first absorption zone is provided with an ammonia water spraying layer at the upper portion and a flue gas inlet above the reaction tank at the lower portion. The second absorption zone is provided with a circulating spraying layer at the upper portion. The circulating spraying layer sprays liquid extracted from the reaction tank through a circulating pipeline and a circulating pump. The third absorption zone is provided with a gypsum spraying layer at the upper portion. The spray tower reaction device transports reaction slurry in the reaction tank to the multistage kettle type reaction device through a conveying pipeline provided with a pressurizing pump. The multistage kettle type reaction device comprises a plurality of kettle type reactors arranged in series. The application improves the continuity of the system operation, and reduces ammonia escape through the controllability of the system operation process.

Description

Technical Field

[0001] This invention belongs to the field of carbon absorption technology, specifically relating to a production method for a device that continuously produces ammonium sulfate and calcium carbonate using carbon dioxide to mineralize gypsum. Background Technology

[0002] One existing method for carbon dioxide absorption and utilization involves absorbing carbon dioxide with ammonia water, followed by further processing of the resulting ammonium carbonate solution. This is achieved by adding solid waste gypsum to a reactor to react calcium sulfate and ammonium carbonate, yielding recyclable products: ammonium sulfate and calcium carbonate. The calcium carbonate can be further utilized as a raw material in cement production systems, while the ammonium sulfate obtained by drying and crystallizing the solution is used as fertilizer. Thus, this method not only absorbs carbon dioxide but also processes solid waste gypsum, producing recyclable ammonium sulfate and calcium carbonate.

[0003] In the reactions described above, it is crucial to ensure sufficient absorption of carbon dioxide. Furthermore, the reaction between calcium sulfate and ammonium carbonate is difficult to separate from the reactants in a timely manner before completion. Therefore, the current practice is to first fully absorb carbon dioxide, then react the reactants with a corresponding amount of solid waste gypsum until complete, and finally separate the reactants. The degree of reaction is often judged by changes in pH during the reaction process. However, this method necessitates a batch-based reaction process. After a certain amount of reactants has fully reacted, the system must be stopped, the products removed, and only then can the next round of reaction begin. This results in the system being unable to operate continuously. Adjustments to the amount and rate of reactant input during operation are difficult to make in a timely manner and can only be made after each reaction cycle. The continuity and controllability of the system operation still need further improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a production method for a continuous production of ammonium sulfate and calcium carbonate using carbon dioxide to mineralize gypsum. This method addresses the technical problem of insufficient continuity and controllability in the operation of existing carbon dioxide absorption systems during the process from absorbing carbon dioxide to reacting it with solid waste gypsum to obtain usable products.

[0005] The production method for continuously producing ammonium sulfate and calcium carbonate using carbon dioxide to mineralize gypsum includes a spray tower reaction device and a multi-stage batch reactor. The spray tower reaction device includes, from bottom to top, a reaction tank, a first absorption zone, a second absorption zone, and a third absorption zone. The first absorption zone has an ammonia water spray layer at the top and a flue gas inlet located above the reaction tank at the bottom. The second absorption zone has a circulating spray layer at the top, which draws liquid from the reaction tank for spraying through a circulating pipeline and a circulating pump. The third absorption zone has a gypsum spray layer at the top for spraying solid waste gypsum slurry. The spray tower reaction device transports the reaction slurry in the reaction tank to the multi-stage batch reactor through a delivery pipeline equipped with a pressurized pump. The multi-stage batch reactor includes several batch reactors arranged in series.

[0006] Preferably, each of the batch reactors is equipped with a pH sensor to detect the degree of reaction, and several pH sensors are evenly distributed from bottom to top in the reaction tank.

[0007] Preferably, the lower part of the reaction tank is provided with a bubbler for upward output of flue gas, the bubbler is provided with uniformly distributed air jets, and the bubbler is connected in parallel with the flue gas inlet to the flue gas input pipe of the flue gas to be treated.

[0008] Preferably, the lower part of the reaction tank is further provided with an ejector located above the bubbler. The ejector has several jet nozzles that spray ammonia water downward toward the bubbler. The jet nozzles are evenly distributed on the lower surface of the ejector. The ammonia water spray layer includes a first sprayer, which is connected in parallel with the ejector to the ammonia water inlet pipe.

[0009] Preferably, the circulating spray layer includes a second sprayer connected to the outlet of the circulating pipeline, the circulating pipeline being connected to the circulating inlet of the spray tower reaction device via the circulating pump, the circulating inlet being lower than the slurry overflow outlet connected to the conveying pipeline but higher than the ejector position.

[0010] Preferably, the reaction slurry is transported between the batch reactors through a delivery pipeline equipped with a pressurized pump. Each batch reactor is equipped with a feed pipe connected to the delivery pipeline. The feed pipe extends to the inner bottom of the batch reactor and has a jet nozzle at the discharge end, with the jet nozzle facing obliquely upward.

[0011] Preferably, the solid waste gypsum slurry, ammonia water, and carbon dioxide absorbed by spraying all enter from the top of the reaction tank. Therefore, the top of the liquid in the reaction tank is the concentrated reaction area of ​​the reactants. Excessive ammonia water is input to ensure that carbon dioxide is fully absorbed. The pH sensor detects the acidity and alkalinity to determine the consumption of ammonia water at different depths during the reaction process. Ammonia water is replenished below the circulation inlet using an ejector to ensure that the liquid in the area where the circulation inlet is located is continuously ammonia-rich mixed solution.

[0012] Preferably, the first and second sprayers are arranged in at least two layers from the upper right to the lower right, and the gypsum spray layer includes a third sprayer for adding solid waste gypsum raw materials and absorbing escaped ammonia gas, and the third sprayer is arranged in at least one layer from top to bottom.

[0013] The advantages of this invention are as follows: This scheme involves injecting flue gas, adding ammonia and solid waste gypsum, etc., all within the spray tower reaction device, eliminating the need to interrupt the feed to ensure the mixture of solid waste gypsum and ammonia reacts fully. Furthermore, any incompletely reacted slurry in this scheme can be monitored for reaction degree using a pH sensor, allowing for adjustments to the input amounts of each raw material, thus ensuring controllable concentration and reaction degree in the slurry. Multi-stage treatment ensures complete reaction of the slurry.

[0014] By employing a multi-stage batch reactor, the volume of mixed slurry input from the reaction tank and transferred between different batch reactors is relatively small each time, enabling the transfer and reaction of raw materials at shorter time intervals, and ultimately obtaining fully reacted products. This improves the continuity of the system's operation. Furthermore, by detecting the pH value at different locations in the reaction tank and different batch reactors, the degree of reaction of the raw materials at each location can be understood. The control of the raw material delivery rate further enables the controllability of the carbon absorption and reaction processes in this system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the spray tower reaction device in this invention.

[0016] Figure 2 This is a schematic diagram of the multi-stage batch reactor in this invention.

[0017] Figure 3 This is a schematic diagram of the production method of the apparatus for continuously producing ammonium sulfate and calcium carbonate using carbon dioxide to mineralize gypsum according to the present invention.

[0018] The labels in the attached diagram are as follows: 1. Spray tower reaction device, 2. Bubble blower, 3. Jet nozzle, 4. Flue gas inlet, 5. First sprayer, 6. Second sprayer, 7. Third sprayer, 8. Circulation inlet, 9. Circulation pump, 10. Pressurization pump, 11. Slurry overflow outlet, 12. Stirred reactor, 13. Jet nozzle. Detailed Implementation

[0019] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of the present invention, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention.

[0020] like Figure 1-3 As shown, this invention provides a method for the continuous production of ammonium sulfate and calcium carbonate from gypsum mineralized by carbon dioxide. The method includes a spray tower reaction unit 1 and a multi-stage batch reactor. The spray tower reaction unit 1 comprises, from bottom to top, a reaction tank, a first absorption zone, a second absorption zone, and a third absorption zone. The first absorption zone has an ammonia water spray layer at its upper part and a flue gas inlet 4 located above the reaction tank at its lower part. The second absorption zone has a circulating spray layer at its upper part. The circulating spray layer draws liquid from the reaction tank for spraying through a circulating pipeline and a circulating pump 9. The third absorption zone... A gypsum spray layer is provided above the third absorption zone for spraying solid waste gypsum slurry (containing calcium sulfate). The spray tower reaction device 1 transports the reaction slurry in the reaction tank to the multi-stage batch reactor via a pipeline equipped with a pressure pump 10. The multi-stage batch reactor includes several batch reactors 12 arranged in series. The batch reactors 12 are all connected by pipelines equipped with pressure pumps 10, and each batch reactor 12 is equipped with a pH sensor to detect the degree of reaction. Several pH sensors are evenly distributed from bottom to top in the reaction tank. The gypsum spray layer is located in the uppermost third absorption zone. It is not only used to add the raw material solid waste gypsum slurry, but also to absorb ammonia gas by utilizing the acidity of the solid waste gypsum slurry, thereby reducing the pollution of the air by ammonia gas escaping during the reaction. During the spraying process, both the ammonia water below and the circulating sprayed liquid with a high ammonia content will cause ammonia gas to escape. Some of the ammonia gas is absorbed by the sprayed liquid or reacts with carbon dioxide, but some ammonia gas will continue to escape. The acidic solid waste gypsum slurry can effectively absorb this part of the ammonia gas, and the solid waste gypsum slurry that has absorbed the ammonia gas will fall into the reaction tank to participate in the reaction.

[0021] The lower part of the reaction tank is equipped with a bubbler 2 that outputs flue gas upwards. The bubbler 2 has evenly distributed jet nozzles and is connected in parallel with the flue gas inlet 4 to the flue gas input pipe of the flue gas to be treated. The upward output of the bubbler 2 is used to achieve the bubbling effect, so that the amount of flue gas that allows the raw materials in the upper part of the reaction tank to be mixed more thoroughly accounts for less than 20% of the total flue gas input. The remaining no less than 80% of the flue gas enters the first absorption zone through the flue gas inlet 4.

[0022] The lower part of the reaction tank is also equipped with an ejector 3 located above the bubbler 2. The ejector 3 has several jet nozzles that spray ammonia water downwards towards the bubbler 2. The jet nozzles are evenly distributed on the lower surface of the ejector 3. The ammonia water spray layer includes a first sprayer 5, which is connected in parallel with the ejector 3 to the ammonia water inlet pipe. A jet pressurization pump 10 is provided in the sprayer or between the sprayer and the ammonia water inlet pipe to pressurize and thus better generate ammonia water jets in the liquid of the reaction tank. The ammonia water sprayed by the first sprayer 5 should be able to fully react and absorb the flue gas input in the first absorption zone; the ammonia water sprayed by the ejector 3 into the liquid of the reaction tank should be able to react and absorb a portion of the carbon dioxide from the flue gas used for bubbling.

[0023] In this way, by using a small portion of the bubbling flue gas and the corresponding ammonia water jet for the reaction, the liquid and added raw materials in the reaction tank can be fully mixed under the bubbling and tumbling of the liquid, enhancing the reaction efficiency and also facilitating the subsequent reaction of the mixed slurry in the multi-stage batch reactor. Most of the ammonia water input to the spray tower reaction device 1 is sprayed out from the first sprayer 5 to absorb carbon dioxide in the flue gas, while a small portion is sprayed into the liquid in the reaction tank. Both the jetter 3 and the bubbler 2 are located at the bottom of the reaction tank, which not only ensures a good bubbling effect, allowing most of the reaction raw materials and products in the reaction tank to be concentrated at the top under the bubbling action and then extracted and transported by the conveying pipeline, but also ensures a high ammonia content while the ammonia water jet reacts with the carbon dioxide in the liquid, so that the circulation pipeline can extract an ammonia-rich mixed solution, improving the absorption effect of carbon dioxide in the flue gas.

[0024] The circulating spray layer includes a second sprayer 6, which is connected to the outlet of the circulating pipeline. The circulating pipeline is connected to the circulating inlet 8 of the spray tower reaction device 1 via the circulating pump 9. The circulating inlet 8 is lower than the slurry overflow port 11 connected to the conveying pipeline but higher than the ejector 3. During normal operation, the liquid level in the reaction tank varies above the circulating inlet 8, ensuring that the circulating spray layer can continuously spray the ammonia-rich mixed solution absorbed by the circulating pipeline, thus ensuring a stable absorption effect on carbon dioxide in the flue gas. The slurry overflow port 11, located above, is used when a certain amount of ammonia water and solid waste gypsum slurry is injected into the reaction tank, causing the liquid level to rise to a certain height. After the liquid level is detected by the liquid level detection device, the mixed slurry near the liquid level is conveyed to the multi-stage batch reactor via the conveying pipeline equipped with a pressurized pump 10. The conveying stops when the liquid level is lower than the slurry overflow port 11, thereby achieving controllable conveying of the mixed slurry. To detect the degree of reaction of the mixed slurry in the above-mentioned liquid level change range, a pH sensor is installed within the liquid level change range.

[0025] In this embodiment, the first sprayer 5 constituting the ammonia spray layer has at least two layers from top to bottom, the second sprayer 6 constituting the circulating spray layer also has at least two layers from top to bottom, and the third sprayer 7 constituting the gypsum spray layer can have only one layer. The first and second sprayers 5 and 6 are configured with more layers because they need to fully absorb the large amount of carbon dioxide in the flue gas, while the third sprayer 7, used for adding solid waste gypsum slurry and absorbing escaped ammonia, can have only one layer.

[0026] The batch reactor 12 is equipped with a feed pipe connected to the conveying pipeline. The feed pipe extends to the bottom of the inner side of the batch reactor 12 and has a jet nozzle 13 at the discharge end, which is positioned obliquely upward. The mixed slurry input in this way passes through the feed pipe and the jet nozzle 13, causing it to be ejected obliquely upward from the bottom of the inner cavity of the batch reactor 12, forming a high-pressure jet. The impact of the high-pressure jet agitates the mixed slurry input into the inner cavity, improving reaction efficiency and allowing the mixed slurry to react more quickly within the limited time in the batch reactor 12. This ensures that the multi-stage batch reactor allows the input mixed slurry to undergo complete reaction through multiple stages within a limited time.

[0027] The working principle of this scheme is as follows: The spray tower reaction device 1 absorbs carbon dioxide from the flue gas and adds ammonia and solid waste gypsum slurry as reaction raw materials. Simultaneously, the reaction tank achieves the initial reaction of the raw materials, forming a mixed slurry. In this section, a pH sensor monitors the reaction status of the raw materials at different depths in the reaction tank. Since the solid waste gypsum slurry, ammonia, and carbon dioxide absorbed by the spray all enter from the top of the reaction tank, the top of the liquid in the reaction tank is the concentrated reaction area of ​​the reactants. Furthermore, to ensure that as much carbon dioxide as possible is absorbed from the flue gas, ammonia is generally added in excess, resulting in a slightly alkaline solution in the reaction. After the addition of the solid waste gypsum slurry, a combined reaction occurs between ammonia, absorbed carbon dioxide, and calcium sulfate. The pH sensor detects the acidity and alkalinity to determine the consumption of ammonia during the reaction process at different depths. The ammonia-rich mixed solution is extracted from the more alkaline depth in the reaction tank and circulated and sprayed in the second absorption zone to absorb as much carbon dioxide as possible from the flue gas.

[0028] Because flue gas is continuously introduced into the spray tower reaction unit 1, and raw materials are continuously added, it is difficult to achieve complete reaction of the raw materials in the reaction tank while the system is running continuously and flue gas is continuously transported. Therefore, this scheme utilizes a multi-stage batch reactor to sequentially transport the mixed slurry with a high degree of reaction in the reaction tank to each stage of batch reactor 12. Generally, the mixed slurry that has undergone more reaction is located in the upper part near the liquid surface, where there is a larger amount of newly added raw materials and more thorough mixing, resulting in a higher content of raw materials and reaction products. The multi-stage batch reactor quantitatively obtains the mixed slurry from the upper layer of the reaction tank according to the capacity and reaction rate of the batch reactor 12. The acquisition of the mixed slurry is coordinated with the addition of ammonia water and solid waste gypsum slurry to ensure that the amount of matter in the reaction tank changes controllably within a certain range during continuous operation.

[0029] In each batch reactor 12, the mixed slurry is allowed a certain reaction time, the raw materials react to obtain a certain amount of product, and the pH value of the slurry further changes towards the pH value after complete reaction. By setting up a sufficient number of batch reactors 12, the amount of mixed slurry injected into each batch reactor 12 is reduced while ensuring that the raw materials can fully react after multi-stage reaction. In the final batch reactor 12, the raw materials are completely converted into ammonium sulfate solution and calcium carbonate. After the final product is output, it is then subjected to subsequent separation, drying and other treatments.

[0030] In this way, the injection of flue gas and the addition of raw materials such as ammonia and solid waste gypsum slurry can be carried out continuously during system operation without interrupting the supply to ensure the full reaction of the mixture of solid waste gypsum slurry and ammonia. In this scheme, the degree of reaction of the incompletely reacted slurry can be detected by a pH sensor, allowing for adjustments to the input amounts of each raw material (mainly ammonia and solid waste gypsum slurry) to ensure controllable concentration and reaction degree in the slurry. Then, when the total liquid volume in the reaction tank reaches a certain level, i.e., the liquid level exceeds a certain height above the slurry overflow port 11, the slurry at the top of the reaction tank is transported to a subsequent multi-stage batch reactor for complete reaction. This process involves a relatively small volume of slurry input from the reaction tank and transferred between different batch reactors 12 each time, allowing for short time intervals for raw material transfer and reaction. Therefore, the reaction process yields a fully reacted final product mixture while avoiding the problems of long reaction times, large quantities of raw materials and reaction products in a single reaction vessel, and the inability to continuously input raw materials to maintain the overall continuous operation of the device. Therefore, in the process of absorbing carbon dioxide and reacting with solid waste gypsum slurry, this device improves the continuity of the system operation. Furthermore, by detecting the pH value at different locations in the reaction tank and in different batch reactors 12, the degree of reaction of the raw materials at each location can be understood. In addition, by controlling the raw material delivery rate, the carbon absorption process and the reaction process in this system can be made controllable.

[0031] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A production method for a continuous production of ammonium sulfate and calcium carbonate using a carbon dioxide-mineralized gypsum plant, characterized in that: The device includes a spray tower reaction device (1) and a multi-stage batch reactor. The spray tower reaction device (1) includes a reaction tank, a first absorption zone, a second absorption zone and a third absorption zone from bottom to top. The first absorption zone is provided with an ammonia spray layer at the top and a flue gas inlet (4) located above the reaction tank at the bottom. The second absorption zone is provided with a circulating spray layer at the top. The circulating spray layer draws liquid from the reaction tank for spraying through a circulating pipeline and a circulating pump (9). The third absorption zone is provided with a gypsum spray layer for spraying solid waste gypsum slurry. The spray tower reaction device (1) transports the reaction slurry in the reaction tank to the multi-stage batch reactor through a conveying pipeline equipped with a pressurizing pump (10). The multi-stage batch reactor includes a number of batch reactors (12) arranged in series. Each of the batch reactors (12) is equipped with a pH sensor, and several pH sensors are evenly distributed from bottom to top in the reaction tank; This device detects the liquid level height through a liquid level detection device, and sequentially transports the mixed slurry with a high degree of reaction in the reaction tank to each stage of the batch reactor (12). The degree of reaction is detected by a pH sensor, and the input amount of each raw material is selected to ensure that the concentration of substances and the degree of reaction in the mixed slurry are controllable. The specific production method is as follows: The spray tower reaction device (1) absorbs carbon dioxide from the flue gas, adds ammonia water and solid waste gypsum slurry as reaction raw materials, and simultaneously achieves the initial reaction of the raw materials through the reaction tank to form a mixed slurry. The reaction status of the raw materials in the reaction tank at different depths is detected by the pH sensor. The solid waste gypsum slurry, ammonia water and carbon dioxide absorbed by the spray all enter from the top of the reaction tank. The top of the liquid in the reaction tank is the concentrated reaction area of ​​the reactants. In order to ensure that the carbon dioxide in the flue gas is absorbed as much as possible, the ammonia water is generally in excess, which leads to the solution in the reaction being alkaline. After the solid waste gypsum slurry is added, a common reaction occurs between ammonia water, absorbed carbon dioxide and calcium sulfate. The pH sensor detects the acidity and alkalinity to determine the consumption of ammonia water in the reaction process at different depths. The ammonia-rich mixed solution is extracted from the more alkaline depth in the reaction tank and circulated and sprayed in the second absorption zone to absorb carbon dioxide in the flue gas as much as possible. Flue gas is continuously introduced into the spray tower reaction device (1), and raw materials are continuously added. Using a multi-stage batch reactor, the mixed slurry with a high degree of reaction in the reaction tank is sequentially transported to each stage of batch reactor (12). The newly added raw materials are more abundant and the mixing is more thorough, containing more raw materials and reaction products. The multi-stage batch reactor quantitatively obtains the mixed slurry from the upper layer of the reaction tank according to the capacity and reaction rate of the batch reactor (12). The acquisition of the mixed slurry is coordinated with the addition of ammonia water and solid waste gypsum slurry to ensure that the amount of matter in the reaction tank changes controllably within a certain range during continuous operation. In each batch reactor (12), the mixed slurry is given a certain reaction time, the raw materials react to obtain a certain amount of product, and the pH value of the slurry further changes towards the pH value after complete reaction. Through the transfer and reaction of the mixed slurry in each batch reactor (12), while reducing the amount of mixed slurry injected into each single batch reactor (12), it is ensured that the raw materials can achieve full reaction after multi-stage reaction. In the final batch reactor (12), the raw materials are completely converted into ammonium sulfate solution and calcium carbonate. After the final product is output, it is then subjected to subsequent separation and drying treatment. The degree of reaction of the unreacted mixed slurry can be detected by pH sensor, and the input amount of each raw material can be changed to ensure that the concentration of substances and the degree of reaction in the mixed slurry are controllable. Then, when the total amount of liquid in the reaction tank reaches a certain level, that is, when the liquid level exceeds a certain height of the slurry overflow port (11), the mixed slurry at the top of the reaction tank is transported to the subsequent multi-stage batch reactor. The mixed slurry is completely reacted by using multi-stage treatment. The volume of mixed slurry input from the reaction tank and transferred between different batch reactors (12) is relatively small each time, and the raw materials can be transferred and reacted in a shorter time interval.

2. The production method of the apparatus for continuously producing ammonium sulfate and calcium carbonate using carbon dioxide to mineralize gypsum according to claim 1, characterized in that: The lower part of the reaction tank is provided with a bubbler (2) that outputs flue gas upward. The bubbler (2) is provided with uniformly distributed jet nozzles. The bubbler (2) and the flue gas inlet (4) are connected in parallel to the flue gas input pipe of the flue gas to be treated.

3. The production method of the apparatus for continuously producing ammonium sulfate and calcium carbonate using carbon dioxide to mineralize gypsum according to claim 2, characterized in that: The reaction tank is also provided with a jetting device (3) located above the bubbler (2) at the bottom. The jetting device (3) is provided with several jet nozzles that spray ammonia water downward toward the bubbler (2). The jet nozzles are evenly distributed on the lower surface of the jetting device (3). The ammonia water spraying layer includes a first sprayer (5), which is connected in parallel with the jetting device (3) to the ammonia water input pipe.

4. The production method of the apparatus for continuously producing ammonium sulfate and calcium carbonate using carbon dioxide to mineralize gypsum according to claim 3, characterized in that: The circulating spray layer includes a second sprayer (6), which is connected to the outlet of the circulating pipeline. The circulating pipeline is connected to the circulating inlet (8) of the spray tower reaction device (1) via the circulating pump (9). The circulating inlet (8) is lower than the slurry overflow outlet (11) connected to the conveying pipeline but higher than the ejector (3).

5. The production method of the apparatus for continuously producing ammonium sulfate and calcium carbonate using carbon dioxide to mineralize gypsum according to claim 4, characterized in that: The reaction slurry is transported between the batch reactors (12) through a conveying pipeline equipped with a pressurizing pump (10). The batch reactor (12) is equipped with a feed pipe connected to the conveying pipeline. The feed pipe extends to the bottom of the inner side of the batch reactor (12) and is equipped with a jet nozzle (13) at the discharge end. The jet nozzle (13) is set at an angle upward.

6. The production method of the apparatus for continuously producing ammonium sulfate and calcium carbonate using carbon dioxide to mineralize gypsum according to claim 5, characterized in that: Solid waste gypsum slurry, ammonia water, and carbon dioxide absorbed by spraying all enter from the top of the reaction tank. Therefore, the top of the liquid in the reaction tank is the concentrated reaction area of ​​the reactants. Excessive ammonia water is input to ensure that carbon dioxide is fully absorbed. The pH sensor detects the acidity and alkalinity to determine the consumption of ammonia water at different depths during the reaction process. Ammonia water is added below the circulation inlet (8) using the jet injector (3) to ensure that the liquid in the area where the circulation inlet (8) is located is continuously ammonia-rich mixed solution.

7. The production method of the apparatus for continuously producing ammonium sulfate and calcium carbonate using carbon dioxide to mineralize gypsum according to claim 6, characterized in that: The first sprayer (5) and the second sprayer (6) are arranged in at least two layers from the upper right to the lower right. The gypsum spray layer includes a third sprayer (7) for adding solid waste gypsum slurry and absorbing escaped ammonia gas. The third sprayer (7) is arranged in at least one layer from top to bottom.

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