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Desulfurization and denitrification device and method

A desulfurization, denitrification, and inlet technology, which is applied in separation methods, chemical instruments and methods, and the use of liquid separation agents, can solve problems such as secondary pollution, difficulty in meeting discharge requirements, ammonia escape, etc., and meets environmental protection standards. effect, high processing efficiency

Inactive Publication Date: 2019-08-02
苏州华加星光新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] CN 201720811858 discloses a wet denitrification device, which sprays and oxidizes the flue gas after combustion with a sodium-alkali solution. It is effective for low and stable nitrogen oxide content in the flue gas, and it is effective for conditions such as biomass Or garbage and other complex components and variable content, the flue gas after combustion is difficult to meet the emission requirements
CN 201820286917 discloses a treatment method using urea or ammonia solution as a desulfurization and denitrification agent, and sodium hypochlorite as an absorption liquid synergist, and the chlorine element in sodium hypochlorite is the main culprit of dioxins, so ammonia will inevitably exist during the use of this method The problem of escape and secondary pollution

Method used

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  • Desulfurization and denitrification device and method
  • Desulfurization and denitrification device and method
  • Desulfurization and denitrification device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] according to image 3 The device performs continuous desulfurization and denitrification of the gas to be treated. The solid-liquid separator 5 is a circulating pump.

[0051] The gas to be treated is a flue gas with a temperature of 800~1000°C, and the dioxin contained in it is 0.001ng / m 3 , NO is 400mg / Nm 3 , SO 2 6000mg / Nm 3 , particulate matter is 63.1mg / m 3 .

[0052] The absorbent is an aqueous solution of ferrous cysteine, its molar concentration is 0.1mol / L, the molar ratio between ferrous ions and cysteine ​​is 1:4, and the lye is sodium hydroxide and sodium hydrosulfide A mixed aqueous solution in which the molar ratio between sodium hydroxide and sodium hydrosulfide is 1:0.5. The pH of the lye is 9.2.

[0053] The flue gas is continuously input into this desulfurization and denitrification device. The flue gas enters the refrigeration device 10 through the pipeline 001, the temperature of the flue gas is dropped to 80°C suddenly, and then enters the ...

Embodiment 2

[0061] according to figure 2 The device performs continuous desulfurization and denitrification of the gas to be treated. figure 2 Activated carbon filler is used in the device, and its specific surface area is 1200m 2 / g.

[0062] The gas to be treated is a flue gas with a temperature of 800~1000°C, and the dioxin contained in it is 0.001ng / m 3 , NO is 400mg / Nm 3 , SO 2 6000mg / Nm 3 , particulate matter is 63.1mg / m 3 .

[0063] The absorbent is an aqueous solution of ferrous cysteine, its molar concentration is 0.1mol / L, the molar ratio between ferrous ions and cysteine ​​is 1:4, and the lye is sodium hydroxide and sodium hydrosulfide A mixed aqueous solution in which the molar ratio between sodium hydroxide and sodium hydrosulfide is 1:0.5. The pH of the lye is 9.2.

[0064] The flue gas is continuously input into this desulfurization and denitrification device. The flue gas enters the absorption reactor 2 through the inlet 101, and the fresh absorbent enters the ...

Embodiment 3

[0067] according to Figure 5 The device performs continuous desulfurization and denitrification operation of flue gas to be treated. Figure 5 Activated carbon filler is used in the device, and its specific surface area is 1200m 2 / g.

[0068] The gas to be treated is a flue gas with a temperature of 800~1000°C, and the dioxin contained in it is 0.001ng / m 3 , NO is 400mg / Nm 3 , SO 2 6000mg / Nm 3 , particulate matter is 63.1mg / m 3 .

[0069] The absorbent is an aqueous solution of ferrous cysteine, its molar concentration is 0.1mol / L, the molar ratio between ferrous ions and cysteine ​​is 1:4, and the lye is sodium hydroxide and sodium hydrosulfide A mixed aqueous solution in which the molar ratio between sodium hydroxide and sodium hydrosulfide is 1:0.5. The pH of the lye is 9.2.

[0070] The flue gas is continuously input into this desulfurization and denitrification device. The flue gas is divided into two branch inlets through the pipeline 001, one is the inlet 101 ...

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Abstract

The invention provides a desulfurization and denitrification device and method. The desulfurization and denitrification device comprises a to-be-treated gas inlet (101), a fresh absorbent inlet (102),an absorption reactor (2), an absorption and regeneration mixed reactor (3), an alkali liquor tank (4) and a solid-liquid separator (5). By means of the desulfurization and denitrification device andmethod, continuous desulfurization and denitrification of to-be-treated gas can be realized, solid particles in the to-be-treated gas can be removed, the treatment efficiency is high, content of NOxand SOx in discharged gas is low, no dioxin is produced, and the national environmental protection standard can be met.

Description

technical field [0001] The invention relates to a desulfurization and denitrification device and method, in particular to a device and method suitable for flue gas desulfurization and denitrification. Background technique [0002] Most of the nitrogen oxides and sulfur dioxide in the atmosphere come from the combustion of fuels, such as thermal power plants, industrial kilns, civil boilers, exhaust emissions from internal combustion vehicles, and so on. Monitoring shows that the concentration of nitrogen oxides and sulfur dioxide in the urban atmosphere exceeds the standard, the environmental capacity of nitrogen oxides is basically saturated, and some places even produce photochemical smog. Sulfur dioxide and nitrogen oxides are also the main acid-causing substances that cause acid rain pollution. [0003] Acid rain refers to the acidic precipitation caused by air pollution. It is generally considered that the acidity pH=5.6 when the atmospheric precipitation and carbon di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/60B01D53/78B01D53/75B01D53/96B01D47/14
CPCB01D47/14B01D53/60B01D53/75B01D53/78B01D53/96B01D2251/206B01D2258/0283
Inventor 程星星路民平
Owner 苏州华加星光新能源科技有限公司
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