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Method and device for purifying waste incineration smoke

A technology for incinerating flue gas and waste, applied in chemical instruments and methods, combined devices, separation methods, etc., can solve problems such as high moisture content, bag dust collector paste, black smoke, etc., to avoid resynthesis temperature, Avoid sticky bags and efficiently remove pollutants

Inactive Publication Date: 2011-11-23
YIXING NENGDA ENVIRONMENTAL PROTECTION TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet method not only has a high removal rate of acid, but also has a good removal effect on various organic pollutants and heavy metals. However, the moisture content in the flue gas after wet deacidification is high, which is easy to cause the subsequent bag filter to stick. , resulting in black smoke during the

Method used

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  • Method and device for purifying waste incineration smoke
  • Method and device for purifying waste incineration smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example is an example of flue gas purification in medical waste incineration. The flue gas generated in the waste incineration process is sent to the quenching absorption tower 1 through the flue gas pipeline. The flue gas is in countercurrent contact with the lye to remove most of the acidic substances and organic pollutants, and the temperature drops to 100°C within 2 seconds. Then enter the heater 2, use the high-temperature flue gas of fuel combustion and the flue gas after wet acid removal to heat up, and the temperature rises to about 130 ° C and enter the activated carbon adsorption device 3 for deep purification, and the purified flue gas enters the bag type. After the dust collector 4 performs dust removal, the purified gas is discharged from the chimney 5 . The emission of harmful substances in the flue gas purified by this method is lower than the maximum allowable emission standard.

Embodiment 2

[0027] This example is an example of flue gas purification in domestic waste incineration. The difference from Example 1 is that after the flue gas generated in the waste incineration process is sent to the quenching absorption tower through the flue gas pipeline, the absorption tail gas directly enters the activated carbon adsorption device for deep purification, and the deeply purified flue gas enters the heater, which is burned with fuel. The high-temperature flue gas from the cyclone is mixed with the flue gas after wet acid removal to heat up, and the temperature rises to about 130 °C and enters the bag filter for dust removal, and the purified gas is discharged from the chimney 5. The emission of harmful substances in the flue gas purified by this method is lower than the maximum allowable emission standard.

Embodiment 3

[0029] This example is similar to Example 1, the difference is that after the flue gas enters the heater 2, the high temperature flue gas generated by the incinerator and the hot air generated after heat exchange with the air are mixed with the flue gas after wet acid removal to heat up. The emission of harmful substances in the flue gas purified by this method is lower than the maximum allowable emission standard.

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Abstract

The invention relates to a method and device for purifying waste incineration smoke. In the method, smoke generated in a waste incineration process is subjected to processes such as wet-type deacidification, heating, activated carbon adsorption, bag dust collection and the like, wherein the wet-type deacidification process plays a role in instantly cooling the smoke generated in a secondary combustion chamber so as to avoid re-synthesis of dioxin. Meanwhile, before entering a dust collector, the smoke subjected to wet-type deacidification is heated by virtue of a heater, so that the phenomenon of pasted bag caused by water vapor condensation is avoided.

Description

technical field [0001] A method and device for purifying flue gas from waste incineration, which are used for the treatment and purification of flue gas generated during the incineration of solid wastes such as domestic waste and medical waste, and belong to the field of harmless treatment of solid waste. Background technique [0002] Compared with other methods, waste incineration, as a method of waste treatment, can better achieve the goals of waste reduction, harmlessness and resource utilization. The flue gas generated during the incineration process will cause secondary pollution to the environment, and these pollutants must be effectively controlled to make them harmless to meet the requirements of environmental protection. This is also a key to waste incineration technology. [0003] The traditional flue gas purification methods mainly include dry flue gas purification process, semi-dry flue gas purification process and wet flue gas purification process. The dry met...

Claims

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Application Information

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IPC IPC(8): B01D50/00B01D53/78
Inventor 不公告发明人
Owner YIXING NENGDA ENVIRONMENTAL PROTECTION TECHCO
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