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Waste sulfuric acid dechlorination tower using air blowing technology, and waste sulfuric acid chlorine removal method

A technology of air blowing and waste sulfuric acid, applied in separation methods, sulfur trioxide/sulfuric acid, chemical instruments and methods, etc., can solve the problems of low purity of chlorine gas, uneven packing arrangement, short gas-liquid contact time, etc. Achieve the effects of increasing mass transfer contact time, ensuring mass transfer efficiency, and reducing gas consumption

Active Publication Date: 2015-08-12
LIAOCHENG LUXI CHEM ENG DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the existing waste sulfuric acid dechlorination tower used in the air blowing method, the gas and liquid of the flat support plate go through the same channel, and the flow resistance of gas and liquid is very large, which is easy to form liquid flooding. In addition, the filler easily occupies the position of the hole, which is effective channel low
When the bell-jar support plate supports the same weight of packing and medium, there are problems of large plate thickness, large investment, and occupying too much effective space of the tower
[0004] On the other hand, due to problems such as uneven packing arrangement or short gas-liquid contact time, etc., problems such as large gas consumption, low purity of chlorine gas, and low extraction rate are caused.

Method used

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  • Waste sulfuric acid dechlorination tower using air blowing technology, and waste sulfuric acid chlorine removal method
  • Waste sulfuric acid dechlorination tower using air blowing technology, and waste sulfuric acid chlorine removal method
  • Waste sulfuric acid dechlorination tower using air blowing technology, and waste sulfuric acid chlorine removal method

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Experimental program
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Effect test

Embodiment 1

[0034] A waste sulfuric acid dechlorination tower for air blowing method, comprising a tower body 1, the tower body 1 is a vertical cylinder, the bottom of the tower body 1 is provided with a gas injection type packing support plate 2, the tower body 1 The side is provided with a waste liquid feed port, the top of the tower is provided with a gas outlet, and the bottom of the tower is provided with a liquid outlet, and the gas jet packing support plate 2 is an annular top beam 3 and a radial brace 4 A convex support system surrounded by the bottom plate, the radiant brace 4 is divided into a protrusion and a smooth part, the protrusion is located at the bottom of the radiant strut 4, the bottom plate and the protrusion are provided with a liquid outlet, and the smooth Gas injection ports are evenly arranged on the upper part, and the gas injection packing support plate is filled with garland packing.

[0035] The support plate of the tower is the main liquid-receiving area of ...

Embodiment 2

[0037] The top of the gas injection packing support plate is provided with an annular top beam, which is connected to the bottom plate through 10 radiant braces, and the other structures are the same as in Embodiment 1. The gas flows in all directions according to the different radiation directions of the beam, forming turbulence, which is more conducive to the mass transfer process.

Embodiment 3

[0039] The diameter of the annular top beam is 1 / 2 of the diameter of the tower body, and other structures are the same as in Embodiment 1.

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Abstract

The invention discloses a waste sulfuric acid dechlorination tower using an air blowing technology, and a waste sulfuric acid chlorine removal method. The waste sulfuric acid dechlorination tower comprises a waste sulfuric acid pump, a waste sulfuric acid tank and a dechlorination tower. In the invention, the flow is simple, and no dechlorination agents are used, so loss of the utilization value of sulfuric acid due to entrance of other impurities to sulfuric acid is avoided; and fee chlorine in waste sulfuric acid is removed, so pollution to environment is avoided.

Description

technical field [0001] The invention belongs to a treatment method for waste sulfuric acid produced in a chlorine gas drying process, in particular to a waste sulfuric acid dechlorination tower for air blowing and a chlorine gas removal method. technical background [0002] The waste sulfuric acid produced in the chlorine drying tower of ion-exchange membrane caustic soda contains a small amount of chlorine gas. The waste chlorine content is about 0.1-0.12%, of which the free chlorine part is 0.07-0.08%. After volatilization, air pollution will be generated. According to the current production The operation of the device requires dechlorination of waste sulfuric acid. Most of the existing enterprises blow off the waste sulfuric acid produced in the chlorine drying tower of the ionic membrane caustic soda chlorine treatment unit with air to remove the free chlorine. , to prevent chlorine gas from overflowing when the waste sulfuric acid enters the storage tank, causing envir...

Claims

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Application Information

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IPC IPC(8): B01D19/00C01B17/90B01D53/78B01D53/68
Inventor 肖光周艳广张文杰袁甫荣康健牛东芳马忠明孙景双荣红焕
Owner LIAOCHENG LUXI CHEM ENG DESIGN