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Regeneration method and device for acid gas-containing solvent

A technology of acid gas and regeneration device, which is applied in the chemical industry, can solve the problems of large steam consumption, serious solvent degradation, and high equipment investment, and achieve the effects of strong penetration, fast heating speed, and investment saving

Pending Publication Date: 2020-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has problems such as high equipment investment, large land occupation, large steam consumption, serious solvent degradation, slow regeneration speed, and low regeneration degree. It is difficult to make breakthroughs in traditional technical improvements.

Method used

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  • Regeneration method and device for acid gas-containing solvent
  • Regeneration method and device for acid gas-containing solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Flue gas capture CO 2 The device uses amine solution as the absorbent to absorb carbon dioxide in the flue gas, and the treated flue gas volume (dry basis) is 550600Nm 3 / h, the carbon dioxide content in the flue gas is 14.45%, and the flue gas temperature is 45°C; in the amine solution for absorbing carbon dioxide, the total concentration of organic amines (comprising monoethanolamine, methyldiethanolamine, diethanolamine, piperazine) is 20% by weight, the rest is water, the flow rate of the amine solution is 3200Nm 3 / h; After the flue gas is decarbonized, the capture rate of carbon dioxide by the amine solution is 82%.

[0043] Using the present invention figure 1 The regeneration device shown in the figure deals with the amine solution that has absorbed carbon dioxide. The amine solution enters the inlet area through the solvent inlet 1, and flows into the degassing pipe 6 through the inlet on the first separator. The microwave transmitter in the microwave emittin...

Embodiment 2

[0048] A set of purification system for removing hydrogen sulfide in natural gas, using MDEA (methyldiethanolamine) aqueous solution (MDEA concentration: 30% by weight) as absorbent to absorb hydrogen sulfide in natural gas, natural gas processing capacity 200Nm 3 / h, the absorption operating pressure is 8.3MPa, and the hydrogen sulfide content in the purified natural gas is less than 200ppm.

[0049] Using the present invention figure 1 The shown regenerative device handles the MDEA aqueous solution that has absorbed hydrogen sulfide. The MDEA aqueous solution enters the inlet area through the solvent inlet 1, flows into the degassing pipe 6 through the inlet on the first partition, and the microwave emitter in the microwave emitting pipe 5 emits microwaves. Microwave heating the MDEA aqueous solution in the degassing tube, the microwave processing power is 10kW-60kW (based on the amount of solvent 1t / h), the average microwave processing time of the solution is 2-4min, and th...

Embodiment 3

[0054] A set of purification system for removing hydrogen sulfide in natural gas, using MDEA aqueous solution (MDEA concentration: 30% by weight) as absorbent to absorb hydrogen sulfide in natural gas, natural gas processing capacity 4000Nm 3 / h, the absorption operating pressure is 3.5MPa, and the hydrogen sulfide content in the purified natural gas is less than 100ppm.

[0055] Using the present invention figure 1 The shown regenerative device handles the MDEA aqueous solution that has absorbed hydrogen sulfide. The MDEA absorbent enters the inlet area through the solvent inlet 1, flows into the degassing pipe 6 through the inlet on the first partition, and the microwave emitter in the microwave emitting pipe 5 emits microwaves. , carry out microwave heating on the MDEA aqueous solution in the degassing pipe, the microwave processing power is 10kW-90kW (based on the amount of solvent 1t / h), the average microwave processing time of the solution is 2-4min, and the hydrogen sul...

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Abstract

The invention provides a regeneration method for an acid gas-containing solvent. The regeneration method comprises a step of performing a microwave heating treatment on the acid gas-containing solventto separate acid gas from the solvent. The invention further provides a regeneration device for an acid gas-containing solvent. The regeneration device comprises a tank body, a first partition plateand a second partition plate, the first partition plate and the second partition plate are arranged in the tank body and are perpendicular to the axial direction, the tank body is divided into an inlet area, a regeneration area and an outlet area from top to bottom through the first partition plate and the second partition plate; the regeneration area comprises a regenerated gas collecting cavity,a microwave transmitting tube and a degassing tube are arranged in the regeneration area in the axial direction; a regenerated gas outlet is formed in the upper part of the side wall of the tank bodyin the regeneration area, a condensate outlet is formed in the lower part of the side wall of the tank body in the regeneration area, a solvent inlet is formed in the side wall of the tank body in the inlet area, and a solvent outlet is arranged in the bottom of the outlet area. According to the method, the solvent is heated through microwave heating, the gas-liquid balance condition in the solvent is changed, and the acid gas is separated from the solvent.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a microwave heating-based regeneration method and device for a solvent containing acid gas. Background technique [0002] The solvent absorption method has a long history of application in the removal of industrial acid gases. It was first used in the process gas purification of coal chemical industry. Commonly used methods include Benfield method (potassium carbonate absorbent), Selexol, low-temperature methanol washing, MDEA, MEA And other physical and chemical absorption methods, the common point of these methods is that the separation of absorbent and acid gas is required by hot regenerative air stripping, so as to realize the regeneration of solvent. This process often requires very high regeneration tower equipment, equipped with a large solvent boiler, and the solvent is regenerated by steam heating. This method has problems such as high equipment investment, larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/00
CPCB01D19/0036
Inventor 毛松柏汪东陈曦黄汉根黄钟斌
Owner CHINA PETROLEUM & CHEM CORP
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