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CN-224207747-U - Device for capturing carbon dioxide generated in sodium hydroxide production process

CN224207747UCN 224207747 UCN224207747 UCN 224207747UCN-224207747-U

Abstract

The utility model provides a device for gathering carbon dioxide that produces in sodium hydroxide production process, its includes a pre-gathering equipment, a circulation equipment, a power equipment to and a capture tower, pre-gathering equipment external a first conveying equipment, first conveying equipment is used for with the carbon dioxide that produces in the sodium hydroxide production process is transmitted to pre-gathering equipment, pre-gathering equipment with circulation equipment still external a second conveying equipment, the capture tower is by a plurality of reaction section of thick bamboo mutual fixation in proper order, the second conveying equipment is used for pre-gathering equipment with circulation equipment provides low concentration sodium hydroxide solution. According to the utility model, the second conveying equipment is used for continuously supplying the low-concentration sodium hydroxide solution into the circulating equipment and conveying the low-concentration sodium hydroxide solution to the trapping tower through the power equipment main body, and the low-concentration sodium hydroxide solution reacts with the carbon dioxide conveyed by the first conveying equipment to generate sodium carbonate, so that the trapping tower is effectively prevented from being blocked.

Inventors

  • HAN MINGQUAN

Assignees

  • 上海海节科技有限公司

Dates

Publication Date
20260508
Application Date
20250328

Claims (10)

  1. 1. An apparatus for capturing carbon dioxide generated in a sodium hydroxide production process, characterized in that the apparatus for capturing carbon dioxide generated in a sodium hydroxide production process comprises a pre-capturing device for preliminarily absorbing carbon dioxide, a circulating device connected to the pre-capturing device, a power device connected to the circulating device for supplying power to the circulating device, and a capturing tower connected to the power device for capturing carbon dioxide, the pre-capturing device comprises a pre-capturing tank for containing sodium hydroxide solution, and a first gas delivery pipe connected to the capturing tower for delivering gas to the capturing tower, the sodium hydroxide solution and carbon dioxide contained in the pre-capturing tank are preliminarily reacted to preliminarily capture carbon dioxide, the pre-capturing device is connected to a first delivery device, a second delivery device, and a liquid receiving device, the pre-capturing device further comprises a second gas delivery pipe connected to the first delivery device for delivering carbon dioxide generated by the first delivery device, the first delivery device for generating sodium hydroxide solution to the circulating device, the pre-capturing device for receiving sodium hydroxide solution in the circulating device, the pre-capturing device for generating sodium hydroxide solution in the circulating device, the pre-capturing device for receiving sodium hydroxide solution in the circulating device, and the capturing device for receiving sodium hydroxide solution in the circulating device, the device comprises a power equipment body connected with the first conveying pipe and a third conveying pipe connected between the power equipment body and the trapping tower, wherein the power equipment body is used for extracting sodium hydroxide solution in the circulating tank through the first conveying pipe and conveying the sodium hydroxide solution to the trapping tower through the third conveying pipe, the first gas conveying pipe is arranged at the bottom of the trapping tower, the trapping tower comprises a plurality of reaction cylinders which are sequentially stacked, each reaction cylinder comprises a cylinder body, a tray arranged in the cylinder body, and a spray assembly, the tray is used for receiving sodium hydroxide solution flowing into the trapping tower, the tray also comprises a circulation hole formed in the tray and used for circulating sodium hydroxide solution and carbon dioxide, the spray assembly is arranged at intervals with the tray and is provided with a plurality of liquid outlet holes for the sodium hydroxide solution and the carbon dioxide when the sodium hydroxide solution and the carbon dioxide are discharged.
  2. 2. The apparatus for capturing carbon dioxide generated in a sodium hydroxide production process according to claim 1, wherein the pre-capturing tank is made of glass fiber reinforced plastic material, and the pre-capturing tank is hermetically arranged.
  3. 3. The apparatus for capturing carbon dioxide generated in a sodium hydroxide production process according to claim 1, wherein said pre-capturing device further comprises a first level meter for measuring a level of sodium hydroxide solution in said pre-capturing tank.
  4. 4. The apparatus for capturing carbon dioxide generated in the sodium hydroxide production process according to claim 1, wherein the second gas delivery pipe is further provided with a sampling hole for sampling the mass of carbon dioxide delivered by the first delivery device.
  5. 5. The apparatus for capturing carbon dioxide generated in a sodium hydroxide production process according to claim 1, wherein the circulation tank is made of glass fiber reinforced plastic material.
  6. 6. The apparatus for capturing carbon dioxide generated during a sodium hydroxide production process according to claim 1, wherein said circulating means further comprises a second level gauge for measuring the level of sodium hydroxide solution in said circulating tank, and a fourth transfer pipe for discharging excess sodium hydroxide solution in said circulating tank to said liquid receiving means.
  7. 7. The apparatus for capturing carbon dioxide generated in a sodium hydroxide production process according to claim 1, wherein said second transporting means continuously supplements sodium hydroxide solution to said circulation tank to prevent a lack of sodium hydroxide solution in said circulation tank from causing a failure of normal reaction of said capturing column due to a lack of sodium hydroxide solution.
  8. 8. The apparatus for capturing carbon dioxide generated in a sodium hydroxide production process according to claim 1, wherein said power plant body is a circulation pump, and said third delivery pipe has one end connected to said power plant body and the other end including a plurality of shunt pipes.
  9. 9. The apparatus for capturing carbon dioxide generated during sodium hydroxide production as set forth in claim 8, wherein said reaction cartridge further comprises a shunt tube communication hole provided in a side wall of said cartridge body for said shunt tube to pass therethrough, said spray assembly comprises a spray main, a plurality of spray branches provided at intervals on both sides of said spray main and communicating with said spray main, and a plurality of liquid outlet holes are provided on each of said spray branches.
  10. 10. The apparatus for capturing carbon dioxide produced in a sodium hydroxide production process according to claim 1, wherein said capturing tower further comprises a valve provided on said capturing tower for controlling a direction of gas flow, said capturing tower further being externally connected with a chlorine gas delivery pipe for delivering high purity chlorine gas and an exhaust gas capturing apparatus for delivering low purity chlorine gas, said chlorine gas delivery pipe and said exhaust gas capturing apparatus being in a negative pressure state.

Description

Device for capturing carbon dioxide generated in sodium hydroxide production process Technical Field The utility model belongs to the technical field of sodium hydroxide production, and particularly relates to a device for capturing carbon dioxide generated in a sodium hydroxide production process. Background Unqualified chlorine gas is generated in the process of producing sodium hydroxide by electrolyzing saturated saline water, and waste chlorine gas is also generated in the filling process of liquid chlorine. None of these exhaust gases can directly enter normal production processes, and therefore, it is necessary to enter a special exhaust gas capturing device and to carry out absorption treatment by sodium hydroxide to produce bleaching agents, thereby realizing waste recycling. The traditional waste gas trapping device sprays and traps chlorine by adopting sodium hydroxide solution, but carbon dioxide gas containing a small amount of chlorine is generated in the production process of sodium hydroxide, and the carbon dioxide gas reacts with the sodium hydroxide to generate sodium carbonate. Along with the continuous work of the waste gas trapping device, the concentration of sodium carbonate can be gradually increased, so that sodium carbonate crystals can be separated out, and then the air inlet or the discharge port of the waste gas trapping device is blocked, so that great hidden danger is caused for the safety production work of enterprises, and meanwhile, the waste gas trapping device is also invalid. Disclosure of Invention In view of the above, the present utility model provides an apparatus for capturing carbon dioxide generated in a sodium hydroxide production process to solve the above-mentioned problems. An apparatus for capturing carbon dioxide generated in a sodium hydroxide production process, comprising a pre-capturing device for preliminarily absorbing carbon dioxide, a circulating device connected with the pre-capturing device, a power device connected with the circulating device and used for providing power for the circulating device, and a capturing tower connected with the power device and used for capturing carbon dioxide, wherein the pre-capturing device comprises a pre-capturing tank for containing sodium hydroxide solution, and a first gas delivery pipe connected with the capturing tower and used for delivering gas to the capturing tower, the sodium hydroxide solution contained in the pre-capturing tank and carbon dioxide perform preliminary reaction to perform preliminary capturing on carbon dioxide, the pre-capturing device is respectively connected with a first delivery device, a second delivery device, and a liquid receiving device, the pre-capturing device further comprises a second gas delivery pipe connected with the first delivery device and used for delivering carbon dioxide generated in the first delivery device, the first delivery device is used for delivering carbon dioxide generated in a sodium hydroxide production process to the pre-capturing tank, the pre-capturing device is used for delivering sodium hydroxide solution to the circulating device, the pre-capturing device is used for receiving sodium hydroxide solution in the circulating device is provided between the circulating device and the circulating device, the circulating device is used for receiving sodium hydroxide solution, the pre-capturing device is connected with the circulating device is used for receiving sodium hydroxide solution, the circulating device is provided between the circulating device and the circulating device, the power equipment comprises a power equipment main body connected with the first conveying pipe and a third conveying pipe connected between the power equipment main body and the trapping tower, wherein the power equipment main body is used for extracting sodium hydroxide solution in the circulating tank through the first conveying pipe and conveying the sodium hydroxide solution to the trapping tower through the third conveying pipe, the first gas conveying pipe is arranged at the bottom of the trapping tower, the trapping tower comprises a plurality of reaction cylinders which are sequentially stacked, each reaction cylinder comprises a cylinder body, a tray arranged in the cylinder body and a spraying assembly, the tray is used for receiving sodium hydroxide solution flowing into the trapping tower, the tray also comprises a circulation hole which is formed in the tray and used for circulating sodium hydroxide solution and carbon dioxide, and the spraying assembly is arranged at intervals with the tray and is provided with a plurality of liquid outlet holes, and when the liquid outlet holes output sodium hydroxide, the sodium hydroxide reacts with the carbon dioxide to trap the carbon dioxide. Further, the pre-trapping groove is made of glass fiber reinforced plastic materials, and the pre-trapping groove is arranged in a sealing mode. Further, the pre-trapping device also