Hydrogen chloride gas circulating recovery system

A hydrogen chloride gas recycling technology, applied in the direction of chlorine/hydrogen chloride, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as high treatment costs, and achieve the effect of promoting clean production, reducing pollution, and improving recovery rate

Inactive Publication Date: 2012-01-04
SUZHOU WUGAN PHARMA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the unabsorbed and discharged hydrogen chloride gas, tail gas treatment also requires a high amount of treatment costs

Method used

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  • Hydrogen chloride gas circulating recovery system
  • Hydrogen chloride gas circulating recovery system
  • Hydrogen chloride gas circulating recovery system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0013] figure 1 Shown a kind of hydrogen chloride gas circulation recovery system, the main body comprises the hydrogen chloride tail gas tank 1, the first-level falling film tower 2, the second-level falling film tower 3 and the third-level packed tower 4 installed in parallel, and the gas outlet of the hydrogen chloride tail gas tank 1 and The air inlet at the upper part of the first-stage falling film tower 2 is connected; The air outlet at the lower end of the secondary falling film tower 3 is connected to the circulation tank 2 8-2, and the air outlet at the lower part of the secondary falling film tower 3 is connected to the air inlet at the lower part of the tertiary packing tower 4; the tertiary packing tower 4. The discharge port at the lower end is connected to the circulation tank 1 8-1, and the air outlet at the upper end of the three-stage packed tower 4 is connected to the air inlet of the vacuum buffer tank 5; the air outlet of the vacuum buffer tank 5 is conne...

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Abstract

The invention relates to a hydrogen chloride gas circulating recovery system, which is characterized in that: a main body comprises a hydrogen chloride tail gas tank, a first-stage falling film tower, a second-stage falling film tower and a third-stage packing tower which are parallelly arranged, and a vacuum buffer tank which participates in forming a circulating system, wherein a gas outlet of the vacuum buffer tank is connected with a gas inlet of a water ring vacuum unit; a discharge hole of the water ring vacuum unit is connected to feeding holes of a circulating tank 1, a circulating tank 2 and a circulating tank 3 respectively; and a discharge hole on the left side of the circulating tank 3 is connected with a circulating finished product tank. Hydrogen chloride tail gas generated in the process of producing industrial sulfanilamide is subjected to circulating absorption through the structure, and the obtained hydrochloric acid can be recycled, so that the resource utilization rate is fully improved, pollution-free production is promoted, production cost is reduced, and the zero emission index of hydrogen chloride gas is met.

Description

technical field [0001] The invention relates to a hydrogen chloride gas circulation recovery system for recovering the hydrogen chloride gas produced in the production of industrial sulfonamide. Background technique [0002] At present, it is used in the chemical industry. In the industrial workshops for the production of industrial sulfonamides, for the treatment of the generated hydrogen chloride tail gas, the figure 2 The structure shown is for absorption treatment. This structure includes a hydrogen chloride tail gas pipe 1 connected in sequence, a falling film absorption tower 10, a condenser 11 and a finished product recovery tank 9. This structure has a simple process, and the absorbed hydrogen chloride gas can only be absorbed in the absorption tower. The water bath method is used to absorb the two simple parts of the condenser and the condenser. If the concentration of the recovered hydrochloric acid is less than that, the reuse of the absorbed hydrochloric acid can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18C01B7/01
Inventor 施方浩
Owner SUZHOU WUGAN PHARMA
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