Active molecule coupled cloth bag catalytic filtration process for incineration flue gas near-zero emission

An active molecule and near-zero emission technology, which is applied in the direction of combined devices, separation methods, and dispersed particle separation, can solve the problems of unreachable, low adsorption efficiency of acidic substances, and limited removal rate of dioxins, etc.

Pending Publication Date: 2019-06-04
中科天龙(厦门)环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process mainly has the following defects: 1) In order to reduce the dioxin content in the waste incineration flue gas to the EU standard, a large amount of powdered activated carbon must be consumed, usually 15-20kg/h, and the annual operating cost is about 1.5 million y...

Method used

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  • Active molecule coupled cloth bag catalytic filtration process for incineration flue gas near-zero emission
  • Active molecule coupled cloth bag catalytic filtration process for incineration flue gas near-zero emission
  • Active molecule coupled cloth bag catalytic filtration process for incineration flue gas near-zero emission

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Experimental program
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Effect test

Embodiment 1

[0014] The system process route is traditional bag filter flue gas → active molecule generator → filter catalytic bag filter → heat exchanger → high-efficiency scrubber → wet electrostatic precipitator → heat exchanger.

[0015] The flue gas from the waste incineration power generation boiler, after the semi-dry deacidification of the original process and the traditional bag filter, the flue gas is fully mixed with the active molecules first, and other free particles are produced, and enters the catalytic filter bag. Under the action of the surface filter catalyst, pollutants such as NO and dioxin are strongly catalyzed and oxidized into soluble or easily absorbed and removed molecules, and then enter the high-efficiency scrubber to be effectively absorbed and removed, and finally enter the wet electrostatic precipitator to further remove fine particles and Fog droplets, to achieve near-zero emissions of acidic substances, dioxins, dust particles and mist droplets in the flue g...

Embodiment 2

[0017] The filter material structure in the filter catalytic bag filter consists of three layers: 1) filter layer, made of e-PTFE (polytetrafluoroethylene); 2) middle layer; 3) (nanofiber) catalytic layer. The filter material structure consists of the following three parts:

[0018] (1) The filter layer is made of e-PTFE (polytetrafluoroethylene),

[0019] (2) The TiO2 film layer in the middle layer uses electrospinning nanotechnology to form TiO2 into fibers with a diameter of 1-2nm, and then weaves the fibers into a film.

[0020] The (nanofiber) catalytic layer is composed of an active layer (V2O5 / CeO2) and a carrier layer (TiO2 / WO3). V2O5 / CeO2 and TiO2 / WO3 are sprayed into 0.5~1nm fibers by electrospinning respectively, and then woven into Nano film layer. Catalyst activity test see figure 2 .

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Abstract

The invention discloses an active molecule coupled cloth bag catalytic filtration process for incineration flue gas near-zero emission. According to the process, after flue gas from a waste incineration power generation boiler is subjected to semi-dry deacidification through the original process, and passes through a traditional cloth bag dust removing device, the flue gas is completely mixed withactive molecules, and other free particles are generated; the obtained gas enters a catalytic filtering cloth bag, and under the action of a filtering catalyst on the surface of the cloth bag, NO, dioxin and other pollutants are subjected to strong catalytic oxidation into soluble or easily absorbed and removed molecules; the obtained gas enters an efficient washing tower, and the soluble or easily absorbed and removed molecules are effectively absorbed and removed; and finally the obtained material enters a wet electrostatic precipitator, and fine particles and fog droplets are further removed so as achieve the near-zero emission of acidic substances, dioxin, dust particles and fog droplets in the flue gas. According to the present invention, the process is designed for waste incineration flue gas, has advantages of simple process and low reforming cost based on the reforming of the original process, can effectively remove acidic pollutants such as NOx, SO2 and the like, can highly remove dioxin, and further has other advantages.

Description

technical field [0001] The invention belongs to the technical field of boiler flue gas treatment, and in particular relates to an active molecule coupling bag catalytic filtration process for near-zero emission of incineration flue gas. Background technique [0002] The problem of urban garbage has become one of the most serious public hazards in the world today. Timely cleaning and disposal of garbage is an indispensable condition for building a beautiful China and a beautiful, clean and civilized modern city. At present, the most effective way to solve the garbage problem is to reduce, recycle, and harmless. Since the 1960s, waste incineration technology has developed on a large scale in developed countries along with the slogan of resource recycling, and has found a scientific solution to the rapid growth of municipal solid waste, which is also in line with harmlessness, reduction, and resource utilization. standardized waste disposal policy. [0003] However, due to th...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/60B01D53/70B01D53/40B01D50/00
CPCY02A50/20
Inventor 赖永花傅太平傅汉文
Owner 中科天龙(厦门)环保股份有限公司
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