Carbonization reactor and carbonization reaction method

Abstract

The present application relates to the technical field of chemical equipment, and discloses a new type of carbonization reactor and a carbonization reaction method. The new type of carbonization reactor includes a reactor body, a liquid inlet pipe, a slurry discharge pipe, an air inlet pipe, a stirring and gas distribution device, and a pressure regulating component; the stirring and gas distribution device includes a hollow stirring part and a gas distribution part fixedly connected thereto and communicating with the inside, and the gas distribution part is a plurality of gas distribution plates arranged at intervals up and down along the hollow stirring part; the hollow stirring part has a gas channel connected to the air inlet pipe; each gas distribution plate surrounds the hollow stirring part and is fixedly connected to the hollow stirring part as a whole, and an annular chamber communicating with the gas channel is formed inside; the gas distribution plate is wavy, and a plurality of air outlets are provided on the lower surface, and an air jet valve is installed at the air outlet. The use of the present application can increase the turbulence of the reaction materials, improve the reaction efficiency, reduce the rate of scar formation on the reactor wall, extend the equipment operation time, and improve the equipment production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, in particular to a novel carbonization reaction kettle and a carbonization reaction method. Background Art

[0002] Sodium carbonate is one of the important chemical raw materials, widely used in light industry, daily chemicals, building materials, chemical industry, food industry, metallurgy, textiles, petroleum, national defense, medicine and other fields. It is used as a raw material, cleaning agent, detergent for manufacturing other chemicals, and is also used in photography and analysis. The second largest consumer of soda ash is metallurgy, textiles, petroleum, national defense, medicine and other industries. The glass industry is the largest consumer of soda ash, with each ton of glass consuming 0.2 tons of soda ash. Among the industrial soda ash, light industry, building materials, and chemical industries account for about 2 / 3, followed by metallurgy, textiles, petroleum, national defense, medicine and other industries.

[0003] At present, both the Solvay process and the Hou process require carbonization of ammonium salt water to generate sodium bicarbonate precipitate with low solubility, which is then separated from the system and calcined to obtain sodium carbonate product. The carbonization reaction in the alkali industry is generally completed using a carbonization tower.

[0004] The inventors of the present application have found that, since the carbonization reaction requires a certain liquid residence time in the tower and a certain gas phase volume space, the carbonization reaction is generally carried out by using a large-volume carbonization tower to meet the above reaction requirements. In addition, the inventors of the present application also recognize that: due to the low degree of turbulence of the fluid inside the carbonization tower, a sodium bicarbonate scar layer will be formed on the inner wall of the carbonization tower, especially on the surface of the cooling tube, during the alkali production process. The longer the operation time, the thicker the scar layer. When the scar layer is formed to a certain thickness, the heat transfer efficiency decreases, the gas and liquid channels become smaller, and the operation cannot be carried out normally. Therefore, the current carbonization tower generally needs to be cleaned after operating for dozens of hours, and several carbonization towers are usually organized into a group for rotation cleaning. Therefore, how to improve the operation time of the carbonization reaction equipment is a difficult problem in the current design of carbonization reaction equipment. Summary of the invention

[0005] According to one embodiment of the present invention, the purpose is to provide a new carbonization reactor and a carbonization reaction method, which can increase the turbulence of the reaction material flow, reduce the formation rate of sodium bicarbonate scars, extend the operation time of the equipment, and improve the production efficiency of the equipment. The above purpose can be achieved by the following technical solutions:

[0006] According to one aspect of the present invention, a novel carbonization reactor provided by the present invention comprises: a reactor body, a liquid inlet pipe and a slurry discharge pipe connected to the interior of the reactor body, an air inlet pipe, a stirring and gas distribution device connected to the air inlet pipe and rotatable in the reactor body, and a pressure regulating component connected to the interior of the reactor body; wherein the stirring and gas distribution device comprises a hollow stirring portion and a gas distribution portion fixedly connected thereto and internally connected thereto, the gas distribution portion being a plurality of gas distribution plates arranged at intervals up and down along the hollow stirring portion; a gas channel is provided in the hollow stirring portion, and the gas channel is connected to the air inlet pipe; each gas distribution plate surrounds the hollow stirring portion and is fixedly connected to the hollow stirring portion as a whole and has an annular chamber formed therein which is connected to the gas channel; the gas distribution plate is wavy, and a plurality of gas outlets are provided on the lower surface, and a jet valve is installed at the gas outlet for spraying gas in the form of bubbles.

[0007] Optionally, the hollow stirring part comprises: an air-guiding transmission rod, a paddle and a driving motor located outside the kettle body; wherein the gas channel is arranged inside the air-guiding transmission rod, one end of the air-guiding transmission rod rotates through the top of the kettle body and is connected to the driving motor for transmission and connects the gas channel with the air inlet pipe, and the other end is located inside the kettle body and fixedly mounted with the paddle; a plurality of gas distribution plates are arranged at intervals up and down along the air-guiding transmission rod, each gas distribution plate surrounds the air-guiding transmission rod and is fixedly connected to the air-guiding transmission rod as a whole and has an annular chamber formed inside that communicates with the gas channel.

[0008] Optionally, the upper surface and the lower surface of the gas distribution plate are both wavy curved surfaces, and the two wavy curved surfaces are parallel to each other. Further, the downwardly concave curved groove formed by the wavy curved surface is a strip groove.

[0009] Optionally, the plurality of air outlet holes are evenly distributed on the lower surface in multiple circles, and the multiple circles of air outlet holes all take the air guide transmission rod as the center; and the jet valve is a spring air valve.

[0010] Optionally, the pressure regulating component is used to automatically adjust the pressure in the kettle body, and includes a demister, an air outlet pipe, a pressure gauge and a back-pressure valve, wherein the demister is fixedly mounted on the inner wall of the kettle body above the liquid inlet pipe, and a hole is provided in the middle of the demister for the air guide transmission rod to pass through, the air outlet pipe is connected to the interior of the kettle body above the demister, and the pressure gauge and the back-pressure valve are arranged in sequence on the air outlet pipe along the air outlet direction.

[0011] Optionally, the liquid inlet pipe is located at the upper part of the kettle body, and a feed valve and a feed flow meter are provided on the liquid inlet pipe. The slurry discharge pipe is located at the bottom of the kettle body, and a discharge valve and a discharge flow meter are provided on the slurry discharge pipe. An inlet pressure gauge is provided on the air inlet pipe, and an outlet pressure gauge is provided on the air outlet pipe.

[0012] Optionally, the kettle body has a jacket, and the jacket has a cooling water inlet and a cooling water outlet.

[0013] According to another aspect of the present invention, a carbonization reaction method provided by the present invention includes: driving a hollow stirring portion to rotate, wherein the hollow stirring portion drives a gas distribution plate to rotate; sending liquid into a kettle body through a liquid inlet pipe, and sending carbon dioxide gas into chambers of multiple gas distribution plates through an air inlet pipe and a gas channel; the gases in the chambers of the multiple gas distribution plates are respectively sprayed out in the form of bubbles, and react with the liquid in the kettle body, and the slurry generated by the reaction is discharged through a slurry discharge pipe; wherein, during the reaction process, the pressure in the kettle body is regulated by a pressure control component.

[0014] Optionally, the step of regulating the pressure in the kettle body through the pressure regulating component includes: setting a preset pressure of the back pressure valve in the pressure regulating component; when the carbon dioxide gas pressure in the kettle body is less than the preset pressure, the back pressure valve automatically closes; when the carbon dioxide gas pressure in the kettle body is greater than or equal to the preset pressure, the back pressure valve automatically opens to discharge excess gas; wherein the gas entering the back pressure valve is the gas treated by the demister on the upper part of the kettle body.

[0015] Optionally, the preset pressure is 0.4 MPa.

[0016] Optionally, the method further comprises: during the reaction process, introducing flowing cooling water into the jacket of the kettle body.

[0017] Beneficial effects: According to one embodiment of the present invention, by setting a specific stirring and gas distribution device, the turbulence degree of the reaction materials in the kettle is increased, the gas-liquid mass transfer is strengthened, the reaction efficiency is improved, and the formation rate of the sodium bicarbonate scar is reduced, thereby extending the operation time of the equipment; and the pressure in the kettle is maintained during the reaction by a pressure regulating component, the air intake is stabilized, and the smooth progress of the carbonization reaction is ensured, which is conducive to extending the operation time of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a carbonization reactor in one embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the gas distribution plate in the carbonization reactor in one embodiment of the present invention, wherein A is a top view and B is a bottom view.

[0020] Figure 3 It is a structural schematic diagram of the connection between the gas guide transmission rod and the gas distribution plate in the carbonization reactor in one embodiment of the present invention. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] A novel carbonization reactor provided in an embodiment of the present application includes: a reactor body, a liquid inlet pipe and a slurry discharge pipe connected to the interior of the reactor body, an air inlet pipe, a stirring and air distribution device connected to the air inlet pipe and rotatable in the reactor body, and a pressure regulating component connected to the interior of the reactor body.

[0023] The stirring and gas distributing device includes a hollow stirring part and a gas distributing part fixedly connected thereto and internally communicated therewith. The hollow stirring part has a gas channel therein, which is communicated with the air inlet pipe outside the kettle body. The hollow stirring part stirs the reaction materials in the kettle body by rotating on the one hand, and transports the gas to the gas distributing part through the gas channel on the other hand, and drives the gas distributing part to rotate on the other hand, and the gas distributing part rotates and distributes gas under the drive of the hollow stirring part. By setting the stirring and gas distributing device as a structure in which the stirring and gas distributing parts are connected and communicated, stirring and gas distributing are performed under the action of rotation, which increases the turbulence of the reaction materials in the kettle, strengthens the gas-liquid mass transfer, improves the reaction efficiency, and also reduces the formation rate of the sodium bicarbonate scar, thereby extending the operation time of the equipment to a certain extent.

[0024] In addition, the gas distribution part in the stirring gas distribution device is set as a multi-stage gas distribution plate arranged at intervals up and down along the hollow stirring part, and each gas distribution plate is set as a wave-type distribution plate. By setting a multi-stage and wave-type gas distribution plate, the liquid in the kettle body forms a layered multi-stage stirring based on the rotation of the multi-stage gas distribution plate, which improves the stirring uniformity. At the same time, based on the wave-type structure, the liquid will continuously fluctuate, further increasing the turbulence of the fluid, and also increasing the residence time of the liquid, and improving the gas-liquid mass transfer.

[0025] Furthermore, the upper and lower surfaces of the gas distribution plate are both set as wavy curved surfaces. Preferably, the two curved surfaces are set parallel to each other to further improve the uniformity of material distribution in the kettle. In addition, preferably, the downwardly concave curved groove formed by the wavy curved surface is a strip groove. Compared with other shapes such as circular grooves, the wavy gas distribution plate with strip grooves generates a stronger degree of turbulence on the fluid.

[0026] In addition, in the stirring arrangement device, the multiple air outlets arranged at the bottom of the gas distribution part are arranged on the lower surface of the gas distribution plate in a multi-circle uniform distribution form. Moreover, the multiple circles of air outlets are arranged with the gas guide transmission rod as the center of the circle. By arranging the air outlets at the bottom of the wave-type gas distribution plate in the above manner, the gas is ejected in the form of bubbles under the action of multiple rotating gas distribution plates, and the gas is evenly distributed in the liquid in the form of bubbles, increasing the contact area between the gas and the liquid, increasing the turbulence of the material, and strengthening the gas-liquid mass transfer. Moreover, the above arrangement can ensure that the turbulence degree at various places inside the kettle body remains relatively consistent, so that the reaction is carried out more evenly and fully, and the reaction efficiency is improved.

[0027] Furthermore, jet valves are installed at the multiple circles of air outlet holes, preferably spring air valves. Gas is ejected in the form of bubbles through the spring air valve and the spring air valve port, while preventing liquid backflow and solid blockage, thereby extending the operating time of the equipment.

[0028] In addition, the present application adopts a pressure control component to adjust the pressure in the kettle in an automatic adjustment manner to stabilize the amount of carbon dioxide. Furthermore, a pressure-controlled back-pressure valve is used in the pressure control component, and the amount of carbon dioxide in the kettle is controlled by the back-pressure valve, specifically by balancing the carbon dioxide gas pressure in the reactor with the spring force in the back-pressure valve. Among them, when the carbon dioxide gas pressure in the reactor is less than the preset pressure, the pressure-controlled back-pressure valve is closed, and when the carbon dioxide gas pressure in the reactor is greater than or equal to the preset pressure, the pressure-controlled back-pressure valve is opened to discharge excess gas treated by the defoamer. The back-pressure valve is used to automatically maintain the air pressure in the kettle, stabilize the amount of carbon dioxide, and provide conditions for the orderly progress of the carbonization reaction.

[0029] In addition, a demister is provided before the back pressure valve. The gas needs to be processed by the demister first and then discharged through the back pressure valve. By providing a demister before the back pressure valve to remove foam, the processing efficiency of the back pressure valve is ensured, the service life is extended, and the single operation time of the equipment is also extended.

[0030] Figure 1 The structure of a carbonization reactor in one embodiment is schematically shown. Figure 2 A top view A and a bottom view B of a gas distribution plate are schematically shown. Figure 3 The structure of the connection between the gas guide transmission rod and the gas distribution plate is schematically shown. Figure 1-Figure 3 The novel carbonization reactor and the method for carbonization reaction using the same in the present application are further described.

[0031] like Figure 1As shown, the novel carbonization reactor provided in this embodiment includes: an air inlet pipe 2, a drive motor, a reactor body, a demister 6, an air outlet pipe 18, a back pressure valve 20, a liquid inlet pipe 7, an air guide transmission rod 12, a plurality of gas distribution plates 11, blades 13, and a slurry discharge pipe 14.

[0032] An air inlet valve 1 and an air inlet pressure gauge 3 are installed on the air inlet pipe 2, a feed valve 9 and a feed flowmeter 8 are installed on the liquid inlet pipe 7, an air outlet pressure gauge 19 is also installed on the air outlet pipe 18, and a discharge valve 15 and a discharge flowmeter 16 are installed on the slurry discharge pipe 14. The above-mentioned valves and instrument settings make it easier to control the operation process, ensure the smooth progress of the reaction, and thus help to extend the equipment operation time.

[0033] The driving motor may be an electric motor 4, which is arranged outside the kettle body and is connected to the gas transmission rod 12 through a rotating shaft. When driven by the driving motor, the gas transmission rod 12 rotates inside the kettle body, and the gas transmission rod 12 drives a plurality of wave-shaped gas distribution plates 11 and blades 13 to rotate together with the gas transmission rod 12 to stir the material together. A gas channel is arranged inside the gas transmission rod 12, and the gas channel is connected to the air inlet pipe 2, for example, by a rotatable gas joint connected to the air inlet pipe 2, and the two are connected inside while ensuring that the rotation of the gas transmission rod 12 is not affected.

[0034] The kettle body is welded by a shell 10 and a head, a jacket 17 is arranged outside the shell 10, and a cooling water inlet is arranged at the lower part, and a cooling water outlet is arranged at the upper part, and flowing cooling water is introduced during the reaction process to take away the reaction heat inside the kettle body. The liquid inlet pipe 7 can be located at one side of the top of the shell 10, the slurry discharge pipe 14 is located at the middle of the lower head, and the gas outlet pipe 18 is located at the upper head 5.

[0035] The demister 6 is fixedly mounted at the top of the shell 10 of the kettle body and is located above the liquid inlet pipe 7. The demister 6 is a circular structure with a hole inside for the air guide transmission rod 12 to pass through. The outer wall is fixedly mounted to the inner wall of the kettle body. The gas in the shell 10 will be first defoamed by the demister 6 and then discharged through the air outlet pipe 18 and the back pressure valve 20, ensuring the orderly operation of the reaction, extending the service life of the back pressure valve 20, and also extending the single operation time of the equipment.

[0036] The gas outlet pipe 18 is connected to the upper end cap 5 located above the demister 6, and a gas outlet pressure gauge 19 and a back pressure valve 20 are sequentially installed on the gas outlet pipe 18 along the gas outlet direction. The pressure-controlled back pressure valve 20 controls the carbon dioxide intake by balancing the carbon dioxide gas pressure in the reactor with the spring force of the back pressure valve 20. When the carbon dioxide gas pressure in the reactor is less than the preset pressure, the pressure-controlled back pressure valve 20 is closed. When the carbon dioxide gas pressure in the reactor is greater than or equal to the preset pressure, the pressure-controlled back pressure valve 20 is opened to discharge the excess gas treated by the demister 6.

[0037] In this embodiment, if Figure 1 As shown, the gas-guiding transmission rod 12, a plurality of gas distribution plates 11, blades 13, and a driving motor together constitute a stirring and gas distribution device in the reactor. Among them, the top of the gas-guiding transmission rod 12 can be rotatably passed through the hole in the middle of the demister 6 and through the upper end cap 5 of the reactor body to be connected to the driving motor outside the reactor body, and the gas channel inside the gas-guiding transmission rod 12 is connected to the air inlet pipe 2. The bottom end of the gas-guiding transmission rod 12 is fixedly mounted with blades 13. A plurality of wave-like gas distribution plates 11 fixed and connected to the gas-guiding transmission rod 12 are installed at intervals along the upper and lower sides of the rod. The driving motor drives the gas-guiding transmission rod 12 to rotate, and the gas-guiding transmission rod 12 drives the plurality of gas distribution plates 11 and blades 13 thereon to rotate simultaneously, so as to stir the material in the reactor body.

[0038] A plurality of gas distribution plates 11 are arranged on the gas guide transmission rod 12 at intervals in the upper and lower parts and are located between the liquid inlet pipe 7 and the slurry discharge pipe 14, forming a multi-layer multi-stage distribution gas. Figure 3 As shown, each gas distribution plate 11 surrounds the gas guide transmission rod 12 and is fixedly connected to the gas guide transmission rod 12 as a whole, and an annular chamber is formed inside the gas distribution plate 11 and communicates with the gas channel of the gas guide transmission rod 12. Figure 2 As shown, the center of the gas distribution plate 11 has a central hole 22 that is fixedly connected to the gas guide transmission rod 12 and communicates with the inside. In addition, the gas distribution plate 11 and the gas guide transmission rod 12 can also be formed into an integrated structure, which better ensures the internal connectivity between the two, ensures safer and more reliable rotation, overcomes the safety problem caused by unreliable connection, and similarly prolongs the operation time of the equipment.

[0039] The gas distribution plate 11 is a wave-type distribution plate, and both the upper and lower surfaces thereof are wave-type curved surfaces, and each curved surface is formed with one or more downwardly concave strip-shaped curved grooves, which increase the fluctuation of the material during the reaction process and improve the turbulence. Furthermore, the wave-shaped curved surfaces of the upper and lower surfaces are completely consistent in shape and are arranged parallel to each other to form a wave-type distribution plate together with the peripheral side plates. In addition, the multiple air outlets at the bottom of the gas distribution plate 11 are evenly arranged in a multi-circle distribution form on the lower surface, and the multiple circles of air outlets are centered on the gas guide transmission rod 12, which can increase the turbulence of the material in the kettle body while making the turbulence of the material in each part of the kettle body more consistent, thereby improving the efficiency of the carbonization reaction; Figure 2 As shown, a spring gas valve is installed at the air outlet to spray the gas in the form of bubbles while preventing liquid backflow and solid blockage. This method also extends the single operation time of the equipment.

[0040] When using the above-mentioned new carbonization reactor of the present application to carry out the carbonization reaction, it includes: when the operation starts, the motor 4 is turned on, and the gas transmission rod 12 drives the blades and the multi-stage wave-shaped gas distribution plate 11 to rotate. The feed liquid enters the reactor through the feed valve and the liquid flow meter in turn. The carbon dioxide gas is sent into the air inlet pipe 2 through the air inlet valve 1; wherein, the air inlet pressure is controlled by the back pressure valve 20 controlled by the pressure of the air outlet pipe 18. When the carbon dioxide gas pressure in the reactor is less than the preset pressure (0.4MPa), the pressure-controlled back pressure valve 20 is closed. When the carbon dioxide gas pressure in the reactor is greater than or equal to the preset pressure, the pressure-controlled back pressure valve 20 is opened to discharge the excess gas treated by the defoamer 6. The carbon dioxide gas in the air inlet pipe 2 enters the annular chamber in the multi-stage wave-shaped gas distribution plate 11 through the gas channel in the air guide transmission rod 12, and is ejected in the form of bubbles from the spring gas valve port 21 on the lower surface of the gas distribution plate 11. The carbon dioxide reacts with the liquid in the reactor to generate bicarbonate slurry, which is discharged from the reactor in sequence through the slurry discharge pipe 14, the slurry discharge valve 15, and the slurry discharge flowmeter 16. In addition, during the whole process, the jacket 17 of the reactor body is filled with flowing cooling water, and the heat generated by the reaction is taken away by the cooling water. The pressure in the reactor is displayed by the pressure gauge of the air outlet pipe 18.

[0041] In this embodiment, the new carbonization reactor maintains a constant air pressure in the reactor by means of a pressure-controlled back pressure valve 20, thereby stabilizing the carbon dioxide supply; by means of a multi-stage and wave-like gas distribution plate 11, in coordination with the gas-guiding transmission rod 12 and the paddle 13, the turbulence of the fluid in the reactor is increased, the gas-liquid mass transfer is enhanced, and the reaction efficiency is improved; by installing a spring gas valve at the gas outlet of the gas distribution plate 11, the gas is sprayed out in the form of bubbles to prevent liquid backflow and solid blockage; each of the above embodiments can extend the single operation time of the reactor. By adopting the above embodiments, the present application can increase the turbulence of the reaction material flow to the greatest extent, reduce the formation rate of the sodium bicarbonate scar, and improve the production efficiency of the reactor.

[0042] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for particular uses.

Claims

1. A carbonization reactor, characterized in that: A kettle body, a liquid inlet pipe and a slurry discharge pipe connected to the inside of the kettle body, an air inlet pipe, a stirring and air distribution device connected to the air inlet pipe and rotatable in the kettle body, and a pressure regulating component connected to the inside of the kettle body; wherein the stirring and air distribution device comprises a hollow stirring portion and an air distribution portion fixedly connected thereto and connected to the inside, the air distribution portion is a plurality of gas distribution plates arranged at intervals up and down along the hollow stirring portion; a gas channel is provided in the hollow stirring portion, and the gas channel is connected to the air inlet pipe; each gas distribution plate surrounds the hollow stirring portion and is fixedly connected to the hollow stirring portion as a whole and has an annular chamber connected to the gas channel formed therein; the gas distribution plate is wavy, and a plurality of air outlets are provided on the lower surface, and an air jet valve is installed at the air outlet for spraying gas in the form of bubbles; Wherein, the upper surface and the lower surface of the gas distribution plate are both wavy curved surfaces, and the two wavy curved surfaces are parallel to each other; the jet valve is a spring gas valve; The pressure regulating assembly is used to automatically regulate the pressure in the kettle, and comprises a demister, an air outlet pipe, a pressure gauge and a back pressure valve, wherein the demister is fixedly mounted on the inner wall of the kettle above the liquid inlet pipe, the middle of the demister has a hole for the air guide transmission rod to pass through, the air outlet pipe is connected to the inside of the kettle above the demister, and the pressure gauge and the back pressure valve are sequentially arranged on the air outlet pipe along the air outlet direction; The liquid inlet pipe is located at the upper part of the kettle body, and is provided with a feed valve and a feed flowmeter; the slurry discharge pipe is located at the bottom of the kettle body, and is provided with a discharge valve and a discharge flowmeter; the air inlet pipe is provided with an air inlet valve and an air inlet pressure gauge, and the air outlet pipe is provided with an air outlet pressure gauge.

2. The carbonization reactor according to claim 1, characterized in that: The hollow stirring part includes: an air-guiding transmission rod, a paddle and a driving motor located outside the kettle body; wherein the gas channel is arranged inside the air-guiding transmission rod, one end of the air-guiding transmission rod rotates through the top of the kettle body and is connected to the driving motor for transmission so that the gas channel is connected to the air inlet pipe, and the other end is located inside the kettle body and fixedly installed with the paddle; a plurality of gas distribution plates are arranged at intervals up and down along the air-guiding transmission rod, each gas distribution plate surrounds the air-guiding transmission rod and is fixedly connected to the air-guiding transmission rod as a whole and has an annular chamber formed inside that is connected to the gas channel.

3. The carbonization reactor according to claim 1, characterized in that: The downwardly concave curved groove formed by the wavy curved surface is a strip-shaped groove.

4. The carbonization reactor according to claim 2, characterized in that: The plurality of air outlet holes are evenly distributed on the lower surface in a plurality of circles, and the plurality of circles of air outlet holes are all centered on the air guide transmission rod.

5. The carbonization reactor according to claim 1, characterized in that: The kettle body is provided with a jacket, and the jacket is provided with a cooling water inlet and a cooling water outlet.

6. A carbonization reaction method, characterized in that: The carbonization reaction kettle according to any one of claims 1 to 5 is used, comprising: driving the hollow stirring part to rotate, the hollow stirring part drives the gas distribution plate to rotate; sending the liquid into the kettle body through the liquid inlet pipe, and sending the carbon dioxide gas into the chambers of multiple gas distribution plates through the gas inlet pipe and the gas channel; the gases in the chambers of the multiple gas distribution plates are respectively sprayed out in the form of bubbles, and react with the liquid in the kettle body, and the slurry generated by the reaction is discharged through the slurry discharge pipe; wherein, during the reaction process, the pressure in the kettle body is adjusted by the pressure regulating component; wherein, The step of regulating the pressure in the kettle body by means of a pressure regulating component comprises: setting a preset pressure of a back pressure valve in the pressure regulating component; when the carbon dioxide gas pressure in the kettle body is less than the preset pressure, the back pressure valve automatically closes; when the carbon dioxide gas pressure in the kettle body is greater than or equal to the preset pressure, the back pressure valve automatically opens to discharge excess gas; wherein the gas entering the back pressure valve is the gas treated by a demister on the upper part of the kettle body.

7. The carbonization reaction method according to claim 6, characterized in that: The preset pressure is 0.4 MPa.

8. The carbonization reaction method according to claim 6, characterized in that: Also includes: During the reaction, flowing cooling water is introduced into the jacket of the kettle.

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