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The main components of the powder spraying waste gas are the dust particles in the spraying process and the organic waste gas generated in the drying and solidification process. The main components of the powdered waste gas are organic waste gas. In the selection of waste gas treatment process, the powdered waste gas is treated by the combination of pulse bag filter + biological deodorization equipment + activated carbon adsorption bed suitable for organic waste gas treatment.

Description of pulverized coal waste gas treatment process

1、 Pulse bag filter: it is a dry-type dust filtering device. It is suitable for catching fine, dry and non fibrous dust. The filter bag is made of textile filter cloth or non-woven felt. The filtering effect of fiber fabric is used to filter the dusty gas. When the dusty gas enters the bag type dust collector, the dust with large particles and large specific gravity will settle down due to the effect of gravity and fall into the ash hopper. When the gas with fine dust passes through the filter material, the dust will be blocked to purify the gas.

Advantages:

1. The dust removal efficiency is high, generally above 99%. The dust concentration in the gas at the outlet of the dust collector is within tens of mg/m3. It has a high classification efficiency for fine dust with submicron particle size.

2. The range of treatment air volume is wide, ranging from a few cubic meters in 1min to tens of thousands of cubic meters in 1min. It can be used for flue gas dust removal of industrial furnaces and reduce the emission of air pollutants.

3. Simple structure and convenient maintenance and operation

4. On the premise of ensuring the same high dust removal efficiency, the cost is lower than that of the electrostatic precipitator.

5. When glass fiber, polytetrafluoroethylene, P84 and other high-temperature resistant filter materials are used, they can operate at a high temperature above 200 ℃.

6. The characteristics of dust are not sensitive and are not affected by dust and resistance.

2、 Activated carbon adsorber: when the organic waste gas is powered by the fan and enters the activated carbon adsorption tower under positive or negative pressure, due to the unbalanced and unsaturated molecular gravity or chemical force on the solid surface of the activated carbon, when the solid surface contacts with the gas, it can attract the gas molecules to concentrate and maintain them on the solid surface, so that the pollutants and odor can be adsorbed. After the waste gas passes through the activated carbon adsorption tower, Enter the dust removal system of the equipment and discharge the purified gas at high altitude up to the standard.

Advantages:

1. Drawer type arrangement is adopted, which makes the replacement of activated carbon more convenient;

2. The selected columnar activated carbon has large specific surface area, high adsorption efficiency and can reach more than 98%;

3. High adsorption efficiency, large adsorption capacity and wide application range

4. Easy maintenance, no technical requirements and simple operation;

5. It has good selective adsorption and can simultaneously treat a variety of mixed exhaust gases;

6. Wide source and low price

3、 Biological deodorization equipment: it is a method to deal with malodorous gas, which is widely studied, technically mature and commonly used in practice. The treatment process is that the gas containing odor passes through the filter bed from bottom to top after the pretreatment process such as dust removal, humidification or temperature reduction. When passing through the filter layer, the odor is transferred from the gas phase to the water microbial mixed phase (biological layer), and is decomposed by the metabolism of micro organisms attached to the filter material. This method mainly uses the biochemical action of microorganisms to decompose pollutants and convert them into harmless substances. Microorganisms use organic matter as the substrate for their growth and reproduction. Through different transformation ways, macromolecules or organic matter with complex structure are oxidized and decomposed into simple inorganic substances such as water and carbon dioxide.

Advantages:

1. Biotechnology, environmental protection and sanitation, no secondary pollution.

2. It can simultaneously process exhaust gas containing multiple pollutants.

3. With strong impact capacity, it can work normally when the exhaust gas concentration fluctuates between 3-1500ppm.

4. Short processing time and high efficiency. The purification can be completed in 5-10 seconds, and the comprehensive efficiency can reach more than 95%.

5. The construction cost is low, the operation cost is low, and there is no need to add chemicals..

6. Biological strains are coated at one time. There are many kinds of strains and the inoculation time is short

7. It is made of glass fiber reinforced plastic / stainless steel, with beautiful appearance, strong corrosion resistance and long service life

8. Composite filter material is adopted, with large surface area, good air permeability, no hardening and long service life.

9. Double layer structure, interlayer filled with thermal insulation material, suitable for cold weather operation, with anti-corrosion coating on the inner layer