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Method for treating fetid exhaust gas in production process of sulfo-amino ester
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A technology for the production process of thioamino esters, which is applied in the field of treatment of malodorous waste gas in the production process of thioamino esters, can solve problems such as inconvenient operation, and achieve the effects of simple method, low investment and operation cost, and stable effect
Active Publication Date: 2012-06-13
CAC NANTONG CHEM
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Each method requires the use of some special equipment or some chemical preparations, which is inconvenient to operate
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Embodiment 1
[0019] (1) The malodorous gas with low boiling point produced in the thioamino ester production process is passed into the buffer tank through vacuuming, and the control pressure is -0.04MPa;
[0020] (2) The gas in the buffer tank is cooled by a cryogenic device, and the freezing temperature is 30° C., and the hydrogen sulfide and VOSC (mercaptan, sulfide) therein are recovered.
[0021] The content of hydrogen sulfide in the collected gas is 160mg / g, the content of VOSC (mercaptan, sulfide) is 2mg / g, the content of hydrogen sulfide in the tail gas after cryogenic treatment is 80mg / g, and the content of VOSC (mercaptan, sulfide) ) content is 750μg / g.
Embodiment 2
[0023] (1) The malodorous gas with low boiling point produced in the thioamino ester production process is passed into the buffer tank through vacuuming, and the control pressure is -0.1MPa;
[0024] (2) The gas in the buffer tank is cooled by a cryogenic device, and the freezing temperature is -50°C, and the hydrogen sulfide and VOSC (mercaptan, sulfide) therein are recovered.
[0025] The content of hydrogen sulfide in the collected gas is 160mg / g, the content of VOSC (mercaptan, sulfide) is 2mg / g, the content of hydrogen sulfide in the tail gas after cryogenic treatment is 100μg / g, and the content of VOSC (mercaptan, sulfide) ) content of 95 μg / g.
Embodiment 3
[0027] (1) The malodorous gas with low boiling point produced in the thioamino ester production process is passed into the buffer tank through vacuuming, and the control pressure is -0.06MPa;
[0028] (2) The gas in the buffer tank is cooled by a cryogenic device, and the freezing temperature is -10°C, and the hydrogen sulfide and VOSC (mercaptan, sulfide) therein are recovered.
[0029] The content of hydrogen sulfide in the collected gas is 160mg / g, the content of VOSC (mercaptan, sulfide) is 2mg / g, the content of hydrogen sulfide in the tail gas after cryogenic treatment is 80μg / g, and the content of VOSC (mercaptan, sulfide) ) content of 15 μg / g.
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Abstract
The invention relates to a method for treating fetid exhaust gas in a production process of sulfo-amino ester, which comprises the following steps of: introducing the fetid exhaust gas with low boiling point produced in the production process into a buffer tank; cooling the gas in the buffer tank by a cryogenic device and recycling a smelly but useful substance therein. Compared with the prior art, the method does not use a chemical agent or add large-scale absorption equipment, but directly uses a conventional refrigerating device in the industrial production so as to realize that a recoveryrate is as high as 99 percent; the method is suitable for removing low-concentration fetid gas containing sulfide; and the method has the following advantages of simple method, reasonable process, stable effect, low operation cost and no secondary pollution and the like.
Description
technical field [0001] The invention relates to a treatment method for waste gas, in particular to a treatment method for malodorous waste gas in the production process of thioamino esters. Background technique [0002] Chemical companies often produce malodorous gases containing sulfur compounds in the process of product production and processing, polluting the atmospheric environment and affecting public health. Large petrochemical companies use Claus combustion devices for high-concentration malodorous exhaust gas emissions. For some low-concentration sulfide stench Generally, activated carbon adsorption, microbial degradation, chemical agent absorption and decomposition, or absorption oxidation methods are used. [0003] Patent No. CN1217952 relates to a method for the removal and purification of sulfur-containing malodorous gases, which introduces the use of sulfur bacillus contact degradation method for removal. Patent No. CN1393278 relates to a purification method for...
Claims
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