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Method for treating tail gas generated by sulfur dioxide production

A sulfur dioxide and treatment method technology, which is applied in the direction of chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of high cost and large pollution, achieve the effect of great significance, low investment cost, and ensure the drying effect

Inactive Publication Date: 2012-05-02
ANHUI JINGHE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the defects of relatively large pollution and high cost in the tail gas of the sulfur dioxide ring in the prior art, and to provide a treatment method for the tail gas of sulfur dioxide production

Method used

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  • Method for treating tail gas generated by sulfur dioxide production
  • Method for treating tail gas generated by sulfur dioxide production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The sulfur dioxide tail gas treated by the absorption tower is introduced into the gas-liquid separator, and the sulfur dioxide tail gas volume is 5500Nm 3 / h, the sulfur dioxide content is 700mg / Nm 3 , pressure 1kp, gas temperature 40°C. The water content of sulfur dioxide tail gas before separation is 15g / Nm 3 , the water content after separation is 2g / Nm 3 .

[0023] The sulfur dioxide tail gas drawn from the gas-liquid separator enters the drying tower for drying. The drying is filled with structured packing, and the acid divider is sprayed, with a spray volume of 30M 3 / h, drying acid temperature 40 ℃.

[0024] The dried sulfur dioxide tail gas is led to the mixer, and mixed with the pure oxygen from the oxygen system to form a mixed gas, so that the oxygen content increases from 10% to 20% (supplementing oxygen makes the oxygen content of the tail gas reach the normal oxygen content standard of air);

[0025] The mixed gas is sent to the fan, which is then...

Embodiment 2

[0027] The sulfur dioxide tail gas treated by the absorption tower is introduced into the gas-liquid separator, and the sulfur dioxide tail gas volume is 3000Nm 3 / h, the sulfur dioxide content is 346mg / Nm 3 , pressure 0.6kp, gas temperature 40°C. The water content of sulfur dioxide tail gas before separation is 13g / Nm 3 , the water content after separation is 2g / Nm 3 .

[0028] The sulfur dioxide tail gas drawn from the gas-liquid separator enters the drying tower for drying. The drying is filled with structured packing, and the acid divider is sprayed, with a spray volume of 30M 3 / h, drying acid temperature 40 ℃.

[0029] The dried sulfur dioxide tail gas is led to the mixer, and mixed with the pure oxygen from the oxygen system to form a mixed gas, so that the oxygen content increases from 10% to 20% (supplementing oxygen makes the oxygen content of the tail gas reach the normal oxygen content standard of air);

[0030] The mixed gas is sent to the fan, which is th...

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Abstract

The invention relates to a method for treating tail gas generated by sulfur dioxide production. The method is characterized by comprising the following steps of: a, introducing sulfur dioxide tail gas subjected to an absorption process into a gas-liquid separator; b, conveying the sulfur dioxide tail gas separated out of the gas-liquid separator into a drying tower, and drying the sulfur dioxide tail gas by adopting 98% concentrated sulfuric acid in a spraying manner; c, introducing the dried sulfur dioxide tail gas into a mixer and mixing the dried sulfur dioxide tail gas and pure oxygen generated by an oxygen generating process so as to enable the content of oxygen in the mixed gas to reach 20 percent, and conveying the mixed gas into a fan of a sulfuric acid system; and d, conveying the mixed gas into an incinerator by the fan of the sulfuric acid system to burn sulfur. The method has the advantages that the process is simple, the influence on the sulfuric acid system is avoided, the zero emission of the tail gas generated by the sulfur dioxide production is realized, and the secondary pollution is prevented.

Description

Technical field: [0001] The invention relates to a method for producing sulfur dioxide by an air method and recovering and treating the tail gas. technical background: [0002] In the process of producing sulfur dioxide by air method, the production process of absorption and analysis is generally adopted. The absorption and analysis of sulfur dioxide depends on the conditions of the absorption process. Generally, the emission of exhaust gas is around 1000PPM, and the emission has exceeded the standard. Even the use of exhaust gas treatment leaves a lot to be desired. At present, most of them are used: gypsum method, sodium alkali method, ammonia method, metal oxidation method, seawater washing method, etc. Although these desulfurization methods have a certain effect on the removal of sulfur dioxide, the by-products obtained are often not easy to sell, and the price is low, the operating cost is high, and some even cause secondary pollution. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): F23G7/06B01D53/26
Inventor 耿庆保
Owner ANHUI JINGHE IND
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