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Process system and method for industrial furnace flue gas multi-pollutant multifield-coupling coordination control

A collaborative control, industrial furnace technology, applied in separation methods, chemical instruments and methods, combined devices, etc., can solve problems such as lack of economical and efficient treatment technology, inability to meet NOx emission reduction requirements, and inability to directly apply to the building materials industry. , to achieve the effect of convenient source of raw materials, small footprint, simple preparation and use

Inactive Publication Date: 2017-10-10
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the treatment of flue gas from industrial furnaces, there are currently mature dust removal and desulfurization technologies in China. However, due to the late start in China, there is a lack of economical and efficient treatment technologies for flue gas denitrification.
At present, the denitration technology with practical industrial application in the building materials industry is mainly SNCR denitration technology, but the denitration efficiency of this technology is low (about 40%) and the reducing agent NH 3 Difficult to obtain, unable to meet NOx emission reduction requirements
The SCR denitrification technology widely used in power plants, due to the significant differences between industrial furnaces and power plant boilers in terms of production characteristics and flue gas composition, such as the high content of alkali (alkaline earth) metals in the exhaust flue gas, easily leads to the existing V -Wo-Ti catalyst is poisoned, so it cannot be directly applied to the building material industry
In addition, compared with the power industry, the flue gas emitted from industrial furnaces in the building materials industry also contains a large amount of unconventional pollutants such as heavy metals, fluorides, and chlorides. Although wet desulfurization technology can synergistically remove some unconventional pollutants, the overall low efficiency
Therefore, for the control of flue gas denitrification and unconventional pollutants, the domestic building materials industry currently lacks effective treatment technologies

Method used

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  • Process system and method for industrial furnace flue gas multi-pollutant multifield-coupling coordination control

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The flue gas of a finished kiln in a ceramic factory, the air volume is 50000m 3 / h, main component SO 2 The average concentration is 250mg / m 3 ;The average concentration of NOx is 180mg / m 3 ;The average concentration of HF is 5mg / m 3 ;The average concentration of HCl is 25mg / m 3 , Pb concentration is 1.5mg / m 3 .

[0043] 1) Start the power supply of the automatic control system, and the automatic control system outputs instructions to the lye pump, lye electronic flow meter, oxidant pump, oxidant electronic flow meter, clean water electronic flow meter, mixer, absorbent pump; NaOH lye, NaClO 2 +Ca(ClO) 2 Oxidant (composite molar ratio is 10:1) and clear water are respectively input into the medicament mixing tank after being measured by an electronic flow meter; the mixer is turned on to prepare a multi-effect absorbent with a pH of 6 and an oxidant concentration of 0.5%; the absorbent pump is turned on to The prepared multi-effect absorbent is delivered to the ...

Embodiment 2

[0049] A cement factory kiln flue gas, the air volume is 350000m 3 / h, main component SO 2 The average concentration is 500mg / m 3 ;The average concentration of NOx is 800mg / m 3 ;The average concentration of HF is 35mg / m 3 ; The average concentration of Hg is 0.5mg / m 3 .

[0050] 1) Start the power supply of the automatic control system, and the automatic control system outputs instructions to the lye pump, lye electronic flow meter, oxidant pump, oxidant electronic flow meter, clear water electronic flow meter, mixer, absorbent pump; Ca(OH) 2 Lye, NaClO 2 +Ca(ClO) 2 Oxidant (composite molar ratio is 15:1), clear water is input medicine mixing tank after being measured by electronic flowmeter respectively; Turn on mixer, preparation pH is 8, and the multi-effect absorbent that oxidant concentration is 1.0%; Turn on absorbent pump, will The prepared multi-effect absorbent is delivered to the absorbent storage tank.

[0051] 2) Turn on the induced draft fan, the programma...

Embodiment 3

[0056] Flue gas from a glass kiln in a special glass factory with an air volume of 10,000m 3 / h, main component SO 2 The average concentration is 4500mg / m 3 ;The average concentration of NOx is 3200mg / m 3 ;The average concentration of HF is 17mg / m 3 ;The average concentration of HCl is 37mg / m 3 , Pb concentration is 0.2mg / m 3 .

[0057] 1) Start the power supply of the automatic control system, and the automatic control system outputs instructions to the lye pump, lye electronic flow meter, oxidant pump, oxidant electronic flow meter, clean water electronic flow meter, mixer, absorbent pump; NaOH lye, NaClO 2 +Ca(ClO) 2 Oxidant (composite molar ratio is 20:1), clear water is input medicine mixing tank after being measured by electronic flowmeter respectively; Turn on mixer, preparation pH is 7, and the multi-effect absorbent that oxidant concentration is 2.0%; Turn on absorbent pump, will The prepared multi-effect absorbent is delivered to the absorbent storage tank.

...

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Abstract

The invention discloses a process system and a method for industrial furnace flue gas multi-pollutant multifield-coupling coordination control. The process system comprises a multifield-coupling multi-pollutant coordination control absorption tower, a multi-effect absorbing agent preparation and storage system, an absorbing agent circulation system, an end solution treatment system and an automatic control system, wherein the multi-effect absorbing agent preparation and storage system, the absorbing agent circulation system and the multifield-coupling multi-pollutant coordination control absorption tower are sequentially connected; the absorbing agent circulation system and the end solution treatment system are sequentially connected; the automatic control system is respectively connected with the multi-effect absorbing agent preparation and storage system, the absorbing agent circulation system and the end solution treatment system. The process system and the method for industrial furnace flue gas multi-pollutant multifield-coupling coordination control provided by the invention have the advantages of high pollutant removal efficiency, simple process equipment, low investment and operation cost, easiness in control and management and the like, and are economic and high-efficient industrial furnace flue gas pollution control technologies.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a process system and method for multi-pollutant multi-field coupling cooperative control of industrial furnace flue gas. Background technique [0002] At present, my country's air pollution situation is still severe. The frequent occurrence of smog in the Beijing-Tianjin-Hebei region, the Yangtze River Delta, and the Pearl River Delta region not only seriously threatens the health of our people, but also negatively affects our country's international image. A large number of studies have shown that the main pollutants that cause air pollution in my country are PM, SO 2 , NOx, VOCs, etc. Among them, boilers in the power industry, motor vehicles, and industrial furnaces in the building materials industry are the main sources of atmospheric PM and SO in my country. 2 , The main source of NOx emissions. [0003] my country's flue gas pollution control in ...

Claims

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Application Information

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IPC IPC(8): B01D53/96B01D53/78B01D53/56B01D53/50B01D50/00
CPCB01D50/00B01D53/502B01D53/56B01D53/78B01D53/96B01D2251/304B01D2251/404B01D2251/60B01D2258/0283
Inventor 岑超平方平陈雄波唐志雄唐子君
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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