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Wet desulfurization and denitrification integrated process method

A process method, wet desulfurization technology, applied in the direction of chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of restricting the development of the flue gas cleaning industry, low recycling rate, high equipment cost, etc., to reduce the cost of chemicals, Reasonable use and the effect of maximizing benefits

Pending Publication Date: 2022-06-28
ENERGY RES INST OF SHANDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the existing technology has disadvantages such as high equipment cost and low recycling rate, which seriously restrict the development of the flue gas cleaning industry.

Method used

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  • Wet desulfurization and denitrification integrated process method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The exhaust gas after dust removal (containing NO1000ppm, SO21000ppm) is transported from the lower part to the washing tower, and the washing liquid contains urea or ammonia water, sodium carbonate, etc. and auxiliary agents, and the auxiliary agents include complexes and surfactants. one or more. The monitoring instrument at the gas outlet of the scrubber is linked with the electric reversing valve to adjust the composition of the flue gas entering the outlet in real time. When the composition of the flue gas at the outlet is lower than the specified value, the electromagnetic reversing valve is linked to discharge the net flue gas. In the circulating washing step, the washing liquid enters the reaction tank 9 after the flue gas is absorbed. The ionic catalyst described in the reaction tank 9 is a soluble metal salt such as copper sulfate, iron sulfate, and manganese sulfate, and the cation exchange membrane 10 is used to maintain the catalytic ion concentration. , ke...

Embodiment 2

[0031] The waste gas after dedusting (containing NO500ppm, SO2600ppm) is transported to the washing tower from the lower part, and the washing liquid contains urea or ammonia water, sodium carbonate, etc. and auxiliary agents, and the auxiliary agents include complexes and surfactants. one or more. The monitoring instrument at the gas outlet of the scrubber is linked with the electric reversing valve to adjust the composition of the flue gas entering the outlet in real time. When the composition of the flue gas at the outlet is lower than the specified value, the electromagnetic reversing valve is linked to discharge the net flue gas. In the circulating washing step, the washing liquid enters into the reaction tank 9 after the flue gas is absorbed. The ionic catalyst described in the reaction tank 9 is soluble metal salts such as copper sulfate, iron sulfate, and manganese sulfate, and the catalyst ion concentration is kept not less than 20 %, the catalytic ion concentration i...

Embodiment 3

[0033] The waste gas after dust removal (containing NO600ppm, SO2400ppm) is transported from the lower part to the washing tower, and the washing liquid contains urea or ammonia water and sodium carbonate, etc. and auxiliary agents, and the auxiliary agents include complexes, surfactants. one or more. The monitoring instrument at the gas outlet of the scrubber is linked with the electric reversing valve to adjust the composition of the flue gas entering the outlet in real time. When the composition of the flue gas at the outlet is lower than the specified value, the electromagnetic reversing valve is linked to discharge the net flue gas. In the cycle washing step, the washing liquid enters into the reaction tank 9 after the flue gas is absorbed. The ionic catalyst described in the reaction tank 9 is a soluble metal salt such as copper sulfate, iron sulfate, and manganese sulfate, and the catalyst ion concentration is kept at 40%, The catalytic ion concentration is maintained t...

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PUM

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Abstract

The invention discloses a wet desulfurization and denitrification integrated process which comprises the following steps: introducing dedusted flue gas into a washing tower containing an ionic catalyst, carrying out oxidation-reduction reaction in a reaction tank, enabling the temperature of the flue gas at an inlet of the washing tower to be not lower than 50 DEG C, and spraying an absorption agent to wash waste gas in the washing tower; when the washing liquid meets the requirement of oxidized sulfate ions, the washing liquid is pumped into the concentration drying tower through a circulating pump, and a fresh washing agent is supplemented in time. The advantages of maximum utilization of the wet desulfurization and denitrification process, small occupied area and low investment are provided, the agent cost of wet denitrification is reduced as much as possible, cheap urea and ammonia water are used in cooperation with other assistants for absorption in the absorption stage, a low-cost catalyst is adopted in the oxidation reduction stage for catalytic oxidation of NO and SO2, and the reduction efficiency is improved. And a corresponding sulfate byproduct is obtained through the concentration tower. Therefore, on the basis of ensuring certain desulfurization and denitrification efficiency, the cost is reduced as much as possible, and extra benefits are obtained.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a wet desulfurization and denitrification integrated process method. Background technique [0002] With the continuous development of the economy, energy consumption continues to expand, and my country's energy consumption is mainly dominated by fossil energy, and the combustion and utilization of SO2 2 and NO x The main flue gas pollutants have become the main pollution source of my country's atmospheric environment. They are known as the "culprit" and "killer" of air pollutants, which pose a serious threat to the living environment of human beings. It is imperative to control its pollutant emissions. [0003] Currently, for NO x , SO 2 The emission control of the combustion engine mainly starts from three aspects: improvement of fuel, treatment during combustion and post-combustion treatment. Considering the improvement of fuel, the use of high-quality fuel will...

Claims

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Application Information

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IPC IPC(8): B01D53/60B01D53/78B01D53/86B01D53/34
CPCB01D53/78B01D53/346B01D53/60B01D53/8637B01D2258/0283
Inventor 王鲁元玄承博韩世旺张兴宇孙荣峰
Owner ENERGY RES INST OF SHANDONG ACAD OF SCI