CN-118925449-B - High-concentration organic waste gas treatment system for storage and loading and unloading links

Abstract

The application discloses a high-concentration organic waste gas treatment system in a storage and loading and unloading link, which relates to the technical field of organic waste gas treatment, and comprises a low-temperature solvent absorption system, an activated carbon adsorption and desorption system and a high-temperature oxidation treatment system, wherein the low-temperature solvent absorption system, the activated carbon adsorption and desorption system and the high-temperature oxidation treatment system are sequentially connected in series through a waste gas conveying pipeline, the low-temperature solvent absorption system can absorb organic matters in waste gas through a low-temperature solvent, the activated carbon adsorption and desorption system can intermittently adsorb the organic matters in the waste gas through activated carbon, and the activated carbon of the activated carbon adsorption and desorption system can carry out organic matter desorption in an interval between two adsorption actions. The application uses the technical means of removing organic matters by combining low-temperature solvent with active carbon, replaces the low-temperature condensation link in the conventional oil gas recovery process, and has the advantages of more energy saving and low operation cost.

Inventors

• ZHENG CHENGWEI
• Kang Tie

Assignees

• 上海安居乐环保科技股份有限公司

Dates

Publication Date

20260508

Application Date

20240812

Claims (6)

1. 1. The high-concentration organic waste gas treatment system for the storage and loading and unloading links is characterized by comprising a low-temperature solvent absorption system (1), an activated carbon adsorption and desorption system (3) and a high-temperature oxidation treatment system (4), wherein the low-temperature solvent absorption system (1), the activated carbon adsorption and desorption system (3) and the high-temperature oxidation treatment system (4) are sequentially connected in series through a waste gas conveying pipeline, the low-temperature solvent absorption system (1) can absorb organic matters in waste gas through a low-temperature solvent, the activated carbon adsorption and desorption system (3) can intermittently adsorb the organic matters in the waste gas through activated carbon, and the activated carbon of the activated carbon adsorption and desorption system (3) is used for desorbing the organic matters in interval intervals between two adsorption actions; The low-temperature solvent absorption system (1) comprises a solvent storage container (11), a lean oil pump (12), a lean oil cooling heat exchanger (14), a refrigerating unit (16) and an absorption tower (17), wherein the solvent storage container (11), the lean oil pump (12), the lean oil cooling heat exchanger (14) and the absorption tower (17) are sequentially connected through a solvent conveying pipeline to form a circulation loop, and the refrigerating unit (16) is used for cooling the solvent passing through the lean oil cooling heat exchanger (14); The activated carbon adsorption and desorption system (3) comprises adsorption tanks (31), vacuum pumps (32) and switching valves (33), wherein the adsorption tanks (31) are filled with activated carbon, two adsorption tanks (31) are arranged, the two adsorption tanks (31) alternately operate, and the switching valves (33) are used for enabling the two adsorption tanks (31) to be respectively in corresponding communication relation with the vacuum pumps (32) and an exhaust gas conveying pipeline; the air inlet pipe of the adsorption tank (31) comprises an air inlet main pipe (312) and a bypass pipe (313), wherein the air inlet main pipe (312) is connected with the end wall of the adsorption tank (31), the bypass pipe (313) is connected with the side wall of the adsorption tank (31), and a port of the bypass pipe (313) connected with the adsorption tank (31) is inclined towards a port of the air inlet main pipe (312) connected with the adsorption tank (31); The gas-liquid separator (2) is arranged between the low-temperature solvent absorption system (1) and the activated carbon adsorption and desorption system (3) in series, the gas-liquid separator (2) is provided with a drain valve (5) for intermittently discharging liquid solvent, the drain valve (5) is a floating ball drain valve, the floating ball drain valve comprises a shell (51) and a floating ball (52), the floating ball (52) is made of ferrite or martensitic stainless steel, a magnet (53) is arranged at the top of the shell (51), the magnet (53) is positioned at the inner side of the shell (51), and the magnet (53) is used for applying upward magnetic attraction force to the floating ball (52), and the magnetic attraction force is smaller than the gravity of the floating ball (52).
2. 2. The system for treating high-concentration organic waste gas in a storage and loading and unloading link according to claim 1, wherein the low-temperature solvent absorption system (1) further comprises a rich oil pump (13) and a lean-rich oil heat exchanger (15), the lean-rich oil heat exchanger (15) is installed between the lean oil pump (12) and the lean-rich oil cooling heat exchanger (14) in series, the rich oil pump (13) is used for pumping the solvent refluxed by the absorption tower (17), and the solvent refluxed by the absorption tower (17) is used as a cooling medium of the lean-rich oil heat exchanger (15).
3. 3. The system for treating high-concentration organic waste gas in a storage and loading and unloading link according to claim 1, wherein the absorption tower (17) is provided with a circulating air pump (18), the outlet end of the circulating air pump (18) is connected with the lower part of the absorption tower (17), and the inlet end of the circulating air pump (18) is connected with the top of the absorption tower (17).
4. 4. The system for treating high-concentration organic waste gas in a storage and loading and unloading truck according to claim 1, wherein the adsorption tank (31) is provided with a nitrogen pipe (34), and the nitrogen pipe (34) is used for conveying nitrogen to the adsorption tank (31).
5. 5. The system for treating high-concentration organic waste gas in a storage and loading and unloading link according to claim 1, wherein the air flow direction of the adsorption tank (31) is integrally along the height direction of the adsorption tank (31), activated carbon in the adsorption tank (31) is arranged in a layered mode, activated carbon on the upper layer and activated carbon on the lower layer are separated by separating sheets (311), a notch (3111) is formed in one side of each separating sheet (311), and notches (3111) of the separating sheets (311) adjacent to each other vertically are staggered along the circumferential direction of the adsorption tank (31).
6. 6. The system for treating high-concentration organic waste gas in a storage and loading and unloading link according to claim 1, wherein the high-temperature oxidation treatment system (4) comprises a heat accumulating type oxidation furnace (41), a combustible gas explosion lower limit analyzer (42) is arranged at the front end of the heat accumulating type oxidation furnace (41), and an induced air pipe (43) is arranged at the front end of the combustible gas explosion lower limit analyzer (42).

Description

High-concentration organic waste gas treatment system for storage and loading and unloading links Technical Field The application relates to the technical field of organic matter-containing waste gas treatment, in particular to a high-concentration organic waste gas treatment system in a storage and loading and unloading link. Background For high-concentration organic waste gas generated in production links of storage, loading and unloading vehicles and the like in industries of petrochemical industry, coal chemical industry, new energy cathode materials and the like, the conventional treatment method at present adopts oil gas recovery processes of low-temperature condensation, adsorption, membrane separation and the like. In the prior art, the low-temperature condensation process step requires that the temperature of the organic waste gas is reduced to about-70 ℃ through two-stage or three-stage condensation, and a large amount of energy is consumed in the process, so that the operation cost is high. Disclosure of Invention In order to reduce the operation cost of high-concentration organic waste gas treatment, the application provides a high-concentration organic waste gas treatment system in a storage and loading and unloading link. The application provides a high-concentration organic waste gas treatment system for a storage and loading and unloading link, which adopts the following technical scheme: The system comprises a low-temperature solvent absorption system, an activated carbon adsorption and desorption system and a high-temperature oxidation treatment system, wherein the low-temperature solvent absorption system, the activated carbon adsorption and desorption system and the high-temperature oxidation treatment system are sequentially connected in series through an exhaust gas conveying pipeline, the low-temperature solvent absorption system can absorb organic matters in the exhaust gas through a low-temperature solvent, the activated carbon adsorption and desorption system can intermittently adsorb the organic matters in the exhaust gas through activated carbon, and the activated carbon of the activated carbon adsorption and desorption system is used for desorbing the organic matters in an interval between two adsorption actions. By adopting the technical scheme, the waste gas generated in the storage and loading and unloading link sequentially passes through the low-temperature solvent absorption system, the gas-liquid separator, the activated carbon adsorption and desorption system and the high-temperature oxidation treatment system. The low-temperature solvent absorption system firstly absorbs organic matters with large molecular weight and high boiling point in the waste gas, then the activated carbon absorption and desorption system further filters and reduces the concentration of the organic matters in the waste gas, and after the concentration of the organic matters in the waste gas is reduced to a certain degree, the high-temperature oxidation treatment system is utilized to carry out high-temperature oxidation treatment. According to the technical scheme, the concentration of organic matters in the low-temperature solvent absorption is utilized, the operation cost is low, the adaptability of the solvent absorption to gas components is high, the organic matters with large molecular weight can be absorbed, the problem of activated carbon blockage is not easy to occur, the adsorption capacity of the activated carbon adsorption and desorption process is high, the concentration of waste gas can be further reduced, and the integral working condition fluctuation resistance of the system is improved. The technical means of removing organic matters by combining low-temperature solvents with active carbon replaces a low-temperature condensation link in the conventional oil gas recovery process, and the whole system is more energy-saving and has low operation cost. Optionally, the low-temperature solvent absorption system comprises a solvent storage container, a lean oil pump, a lean oil cooling heat exchanger, a refrigerating unit and an absorption tower, wherein the solvent storage container, the lean oil pump, the lean oil cooling heat exchanger and the absorption tower are sequentially connected through a solvent conveying pipeline to form a circulation loop, and the refrigerating unit is used for cooling the solvent passing through the lean oil cooling heat exchanger. By adopting the technical scheme, when the low-temperature solvent absorption system is operated, the solvent in the solvent storage container flows to the top of the absorption tower after passing through the lean oil cooling heat exchanger under the pumping action of the lean oil pump, the lean oil cooling heat exchanger cools and cools the solvent, high-concentration organic waste gas enters from the bottom of the absorption tower and is in countercurrent contact with the low-temperature absorption solvent sprayed from the to