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Method and device for selectively removing hydrogen sulfide by use of ultrasonically atomized liquid droplets

A hydrogen sulfide removal and ultrasonic atomization technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of methyldiethanolamine waste, low absorption efficiency, and weak desulfurization selectivity

Active Publication Date: 2012-12-05
SHANGHAI HUACHANG ENVIRONMENT PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The primary technical problem to be solved by the present invention is to solve the problem of low desulfurization selectivity and low absorption efficiency in the existing hydrogen sulfide-containing gas removal process, resulting in waste of methyldiethanolamine, and improve the absorption efficiency and absorption accuracy

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  • Method and device for selectively removing hydrogen sulfide by use of ultrasonically atomized liquid droplets
  • Method and device for selectively removing hydrogen sulfide by use of ultrasonically atomized liquid droplets

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Embodiment 1

[0066] In a 50000m 3 / h of natural gas production and treatment process, according to the method of the present invention, a droplet enhanced desulfurization and decarbonization device is used to enhance the separation of natural gas mixtures containing hydrogen sulfide and carbon dioxide to achieve high efficiency and low loss. The effective separation of natural gas and acid gas in a variety of acid gas mixtures, the specific operation process and effect are described as follows:

[0067] 1. Mixed gas properties and operating conditions

[0068] The mixed gas is natural gas, the main components are 96% alkanes, 1% hydrogen sulfide and about 9% carbon dioxide. Natural gas processing capacity is 5000m 3 / h, the operating temperature of the gas phase density is 50°C, and the operating pressure is 2.7MPa. The concentration of N-methylglycolamine solution (methyldiethanolamine) is 20-40%. It is atomized by an ultrasonic atomizer, and the average atomized particle diameter is below 50...

Embodiment approach

[0070] Methyldiethanolamine droplets are produced by an ultrasonic atomizer, the average droplet particle diameter is below 50 microns; the mixed gas containing sulfur and carbon quickly enters the cyclone; in the cyclone, a large number of methyldiethanolamine droplets It fully contacts and reacts with the sulfur and carbon components in the mixed gas; then, the desulfurized and decarbonized gas entrains methyldiethanolamine droplets into the cyclone, and performs ultra-low pressure drop gas-liquid cyclone separation; Diethanolamine is separated from the purified mixed gas, and the pressure drop is less than 30mmH 2 O (300Pa); the content of hydrogen sulfide in the purified gas is less than 10ppm; the methyldiethanolamine droplets are enriched, recovered, regenerated, and recycled.

[0071] 3. Experimental results

[0072] After separation by the use of droplet enhanced desulfurization and decarburization methods, the hydrogen sulfide content at the gas phase outlet of the cyclone...

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Abstract

The invention relates to a method and device for selectively removing hydrogen sulfide by use of ultrasonically atomized liquid droplets, and provides a method for selectively removing hydrogen sulfide by use of ultrasonically atomized liquid droplets. The method comprises (i) atomizing a methyldiethanolamine solution by ultrasonic atomization to give liquid droplets with a size of 10-15mum; (ii) uniformly mixing the obtained methyldiethanolamine liquid droplets with a gas containing hydrogen sulfide and spraying the mixture into a cyclone within time shorten than one second; (iii) in the cyclone, allowing the methyldiethanolamine liquid droplets to absorb the hydrogen sulfide in the gas while separating the methyldiethanolamine liquid droplets in the cyclone field of the cyclone, and aggregating to form a hydrogen sulfide-rich methyldiethanolamine solution; and (iv) recycling the hydrogen sulfide-rich methyldiethanolamine solution, atomizing by ultrasonic atomization to give liquid droplets, and cyclically using the liquid droplets in the step (ii). Also provided is a device for selectively removing hydrogen sulfide by use of ultrasonically atomized liquid droplets.

Description

Technical field [0001] The invention belongs to the field of chemical environmental protection, and relates to an ultrasonic atomizer that atomizes methyldiethanolamine into droplets, selectively removes hydrogen sulfide in a cyclone, and separates the droplets in a cyclone field to obtain The method of purifying gas is suitable for the selective desulfurization and gas-liquid heterogeneous separation process including acidic gas containing hydrogen sulfide and carbon dioxide. Specifically, the present invention provides a cyclone separation method and device for selective desulfurization and liquid droplet absorption in a hydrogen sulfide gas desulfurization process. Background technique [0002] With the development of economy and society, the air pollution and greenhouse effect caused by the burning of fossil fuels have seriously threatened the global environment on which humans depend. In the process of using fossil raw materials, inorganic sulfur (hydrogen sulfide, SO 2 Etc....

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/52B01D45/16
Inventor 钱鹏汪华林许德建吴精平邱阳吴文峰
Owner SHANGHAI HUACHANG ENVIRONMENT PROTECTION
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