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Method for processing sucralose tail gas

A technology of sucralose and treatment method, which is applied in the chemical industry, can solve the problems of high cost and secondary pollution, and achieve the effect of thorough recovery of sulfur dioxide, strong practicability, and environmental protection

Inactive Publication Date: 2017-03-01
ANHUI JINGHE IND
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Problems solved by technology

[0003] The purpose of the present invention is to provide a treatment method for sucralose tail gas in order to overcome the disadvantages of large cost and secondary pollution caused by the corresponding lye absorption and neutralization method. The way of HCl, the lye absorption in it is abolished, and the cryogenic method is used to recover and produce liquid sulfur dioxide

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  • Method for processing sucralose tail gas
  • Method for processing sucralose tail gas

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Embodiment Construction

[0017] Such as figure 1 As shown, the equipment used in the present invention is shown in the following table.

[0018]

[0019] The tail gas from sucralose first passes through the water washing tower to wash away the HCl entrained in the gas. The water washing tower is equipped with a circulating water washing cooler and its connected water washing pump to control the washing temperature in the water washing tower at 30°C-38°C. CL-≥500ppm in the washing tower, concentrated water is extracted.

[0020] The tail gas treated by the water scrubber is condensed by a precooler, and then processed by a gas-liquid separator. The separated liquid returns to the water scrubber and the gas enters the Roots blower. The inlet pressure of the roots blower is set at -2kpa during normal operation. When the inlet pressure of the blower shows +1KPa, start the roots blower, open the blower outlet valve, and set the negative pressure of the blower inlet at -2kpa. Concentrated SO pressurized by Ro...

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Abstract

The invention relates to a method for processing sucralose tail gas. The method comprises the following steps: sucralose tail gas passes through a washing tower for washing HCl gas, then is subjected to gas-liquid separation through a precooler and a gas-liquid separation device, the separated liquid is returned to a washing tower, the separated gas passes through a Roots blower and then pressured, the gas passes through a primary condenser and a secondary condenser for refrigeration processing, the formed SO2 liquid and non-condensable gas are introduced into a SO2 recovery storage tank, and the non-condensable gas is introduced into an absorbing tower of an original SO2 system or emptied. The method has the advantages that processing of the sulfur dioxide in tail gas does not require consumption of alkali lye, massive alkali lye consumption is saved; the sulfur dioxide can be thoroughly recovered, no new waste is required to be processed; the method for recovering the sulfur dioxide is simple, and maneuverability and practicality are strong.

Description

Technical field [0001] The invention belongs to a preparation method of sucralose in the technical field of chemical industry, and particularly relates to a treatment method for liquefying gaseous sulfur dioxide in sucralose tail gas into a liquid state by a cryogenic method, so as to achieve the purpose of tail gas purification, emission reduction, and production increase. Background technique [0002] In the preparation process of sucralose, every ton of sucralose produced will produce 4 tons of sulfur dioxide waste gas that needs to be treated. In the previous process for the treatment of sulfur dioxide in sucralose tail gas, lye was mainly used for absorption and neutralization, but this not only cost a lot of investment, but also produced new solid waste that needed to be treated, forming a second pollution. Summary of the invention [0003] The purpose of the present invention is to overcome the disadvantages of high cost and secondary pollution caused by the corresponding l...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/00
CPCB01D53/1481B01D53/002B01D2257/2045
Inventor 田家民杨明开
Owner ANHUI JINGHE IND
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