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Device for removing NOx (Nitrogen Oxide), SO2 (Sulfur Dioxide) and PM2.5 (Particulate Matter 2.5) simultaneously

A SO2 removal technology, applied in chemical instruments and methods, using liquid separating agents, dispersing particle separation, etc., can solve problems such as the predominance of target bacteria, overcome the inhibition problems of oxygen and temperature, and reduce secondary pollution. , the effect of low energy consumption

Inactive Publication Date: 2015-06-03
广州市新望谷环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device effectively solves the problem of oxygen and temperature suppression in exhaust gas, and can make NOx and SO 2 The removal rate reaches over 90%, PM 2.5 The removal rate reaches more than 80%, and it can ensure that the target bacteria in the device are always dominant, so as to maintain the high efficiency of the long-term operation of the device

Method used

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  • Device for removing NOx (Nitrogen Oxide), SO2 (Sulfur Dioxide) and PM2.5 (Particulate Matter 2.5) simultaneously

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A simultaneous removal of NOx, SO 2 and PM 2.5 devices such as figure 1 As shown, it includes a control system 1, a biotrickling filter tower 2 and a microbial activity regenerator 3. The biotrickling filter tower 2 is provided with a packing layer loaded with biofilm, and the microbial activity regenerator 3 is equipped with microbial nutrient solution and newly cultivated targets. Bacteria liquid; the bottom of the biological trickling filter tower 2 communicates with the microbial activity regenerator 3, and the biological activity regenerator 3 communicates with the top of the biological trickling filter tower 2 through a pump, and the top of the biological trickling filter tower 2 is also provided with an exhaust port; controlled by the control system 1 controls the flue gas to be sent to the bottom of the biological trickling filter tower 2, and the control system 1 also controls the liquid in the microbial activity regenerator 3 to be pumped into the top of the ...

Embodiment 2

[0038] The main components and concentration of exhaust gas from a small boiler: NOx100mg / m 3 , SO 2 80mg / m 3 , O 2 8%, CO 2 11%, PM 2.5 The content is 420μg / m 3 , the inlet temperature is 40-50℃, and the average volume flow rate of exhaust gas is 1000m 3 / h.

[0039] (1) According to the amount of gas to be treated, the packing layer of the bio-trickling filter tower is determined to be two layers, and the flow rate of the circulating liquid is 250L / h. The cultured composite bacteria are inoculated on the packing, and the film is formed by mixing the packing and the culture solution. , so that the microorganisms are well loaded on the surface of the packing, and then loaded into the packing tower. Then continue to hang the film for a period of time, and a layer of biofilm grows on the filler, indicating that the film hanging is successful.

[0040] (2) Use a heating rod to keep the temperature at 45°C for the circulating fluid, and keep the dissolved oxygen at 7.6mg / ...

Embodiment 3

[0043] Main components and concentrations of flue gas from a coal-fired power plant: NO700mg / m 3 , SO 2 520mg / m 3 , O 2 8%, CO 2 10%, PM 2.5 The content is 530μg / m 3 . The inlet temperature is 40-50℃, and the exhaust gas volume flow rate is about 10000m 3 / h.

[0044] (1) According to the amount of gas to be treated and the concentration of nitrogen oxides in the exhaust gas, the packing layer of the biological trickling filter tower is determined to be three layers. The total flow rate of circulating liquid is 1000L / h.

[0045] (2) Inoculate the cultured composite bacteria on the filler, and adopt the method of mixed culture of the filler and the culture medium to hang the film, so that the microorganisms are well loaded on the surface of the filler, and then loaded into the packed tower. Then continue to hang the film in the tower for a period of time, and a layer of biofilm grows on the filler, indicating that the film is successful.

[0046] (3) The temperature ...

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Abstract

The invention discloses a device for removing NOx (Nitrogen Oxide), SO2 (Sulfur Dioxide) and PM2.5 (Particulate Matter 2.5) simultaneously. The device comprises a control system, a bio-trickling tower and a microbial activity regenerator, wherein a material filling layer loaded with a biological membrane is arranged in the bio-trickling tower; a microbial nutrient solution is filled in the microbial activity regenerator; the bottom of the bio-trickling tower is communicated with the microbial activity regenerator which is communicated with the top of the bio-trickling tower through a pump; a gas exhausting outlet is formed at the top of the bio-trickling tower; and the control system enables the flue gas to be sent into the bottom of the bio-trickling tower and also enables the liquid in the microbial activity regenerator to be pumped into the top of the bio-trickling tower. As the device is used, the NOx, the SO2 and PM2.5 can be simultaneously removed from the flue gas; and the problem of the inhibition of oxygen and temperature in the environment is solved. Therefore, the device is suitable for the purification of the flue gas in a coal-fired power plant. In addition, the device disclosed by the invention also has the advantages that the process equipment is simple; the energy consumption and the running cost are low; and the secondary pollution is less and the like.

Description

technical field [0001] The invention relates to air pollution control, biological filtration technology, and environmental pollution control technology in the field of environmental protection, and specifically refers to a method for simultaneously removing NO under mesophilic and aerobic conditions. x , SO 2 and PM 2.5 installation. Background technique [0002] The energy production process directly emits a considerable amount of solid particles, and the emission of particles is closely related to factors such as boiler type, power, main fuel, and dust removal and separation devices. Respirable particulate matter from coal combustion, especially PM 2.5 Unlike dust and other fine particles from natural sources, it is usually enriched with various heavy metal elements and organic pollutants such as PAHs and VOCs. [0003] In coal-fired power plants, although the traditional dust removal method has high dust removal efficiency, it still cannot control small particles, esp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/84B01D53/60B01D47/00
CPCY02A50/20
Inventor 黄少斌吴智导张永清邱灼华
Owner 广州市新望谷环保科技有限公司
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