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Acid regeneration acid gas absorption and exhaust emission reduction system and utilization method thereof

An acid regeneration and acid gas technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as insufficient development and optimization attention, and achieve the effect of reducing pollution and harm

Inactive Publication Date: 2015-04-01
CHINA IRON & STEEL RES INST GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insufficient attention has been paid to the development and optimization of absorption and scrubbing system process methods in the field of acid regeneration technology as a whole, although limited improvements have also been made in absorption and exhaust emission control

Method used

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  • Acid regeneration acid gas absorption and exhaust emission reduction system and utilization method thereof

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Effect test

Embodiment 1

[0043] Waste acid treatment capacity 3.5m 3 / h acid regeneration unit, the inlet temperature of the primary absorption tower is 88-96°C. Intake volume is 8700~9500Nm 3 / h, the instant spray volume is about 3.5m 3 / h of absorbed water. The area of ​​the round hole type acid-resistant graphite heat exchanger is 20m 2 The cooling capacity is about 190,000Kcal / h (equivalent to 50,000kcal to 60,000kcal for every cubic meter of acid liquid regenerated). The outlet gas temperature of the primary absorption tower is 65-70°C, and the outlet gas temperature of the exhaust gas scrubber is about 60°C, which meets the standard discharge. Compared with the conventional acid regeneration process, the discharge temperature of exhaust gas is reduced by 13-18°C, and the amount of exhaust gas is reduced by nearly 20%.

Embodiment 2

[0045] Waste acid treatment capacity 4m 3 / h acid regeneration unit, the intake temperature of the primary absorption tower is 88-96°C, and the intake air volume is 9000-11000Nm 3 / h, the average spray volume of the absorption level at the top of the tower is about 4m 3 / h. The material of the heat exchanger is made of acid-resistant and temperature-resistant F4 (polytetrafluoroethylene), and the area of ​​the cooler is 28m 2 , The cooling capacity is about 210000Kcal / h (equivalent to 50000kcal~60000kcal for every cubic meter of acid liquid regenerated). The gas temperature at the outlet of the first-stage absorption tower is 10-15°C lower than that of the original process, and the outlet gas temperature of the exhaust gas scrubber is about 60°C, meeting the emission standard. Compared with the existing technology, the discharge temperature of exhaust gas is reduced by 13-16°C, and the amount of exhaust gas is reduced by 16-18%.

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Abstract

The invention relates to an acid regeneration acid gas absorption and exhaust emission reduction system and a utilization method thereof. The acid regeneration acid gas absorption and exhaust emission reduction system comprises a primary absorber, a secondary absorber, a blower, a gas-liquid separator and a waste gas washing tower which are sequentially communicated. The acid regeneration acid gas absorption and exhaust emission reduction system also comprises a water collecting tank, wherein the water collecting tank is respectively communicated with the primary absorber and secondary absorber. A heat exchanger is arranged between the water collecting tank and primary absorber, and used for cooling absorbed water flowing out of the water collecting tank and sending the cooled absorbed water into the primary absorber. The acid regeneration acid gas absorption and exhaust emission reduction system or acid regeneration method provided by the invention solves the problems of overhigh temperature, high moisture content, overproof and unstable acid content and the like in the exhaust emitted by the acid regeneration engineering, and reduces the pollution and hazards.

Description

technical field [0001] The invention belongs to the technical field of waste acid regeneration, and in particular relates to an acid regeneration acid gas absorption and tail gas emission reduction system and its utilization method. Background technique [0002] In the field of waste acid treatment, the absorption of high-temperature acid gas and waste gas scrubbing in acid regeneration acid gas absorption and tail gas emission reduction systems are important process links and control objectives. The process of high temperature acid gas absorption mainly determines the quality of regenerated acid. The exhaust gas scrubbing system ensures that the acid-containing exhaust gas is purified and discharged up to the standard. If the absorption effect of the absorption system is not ideal, the acid content in the exhaust gas will inevitably increase. Therefore, the quality of high-temperature acid gas absorption not only determines the quality of regenerated acid products, but al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/18
Inventor 杨绿邱光习王海林张振林郭振英
Owner CHINA IRON & STEEL RES INST GRP
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