Views: 5 Author: XICHENG EP LTD Publish Time: 2021-08-23 Origin: XICHENG EP LTD
Exhaust gas treatment should be carried out from two aspects: one is to remove dust from suspended particulate pollutants; the other is to purify gaseous pollutants. The control of gaseous pollutants is mainly to use physical and chemical properties, such as solubility, adsorption saturation, and dew point. And the differences in the choice of chemical reactions, etc., separate the pollutants from the exhaust gas; perhaps the pollutants are converted into harmless or easy-to-treat substances. The basic methods of exhaust gas purification include absorption method, adsorption method, condensation method, catalytic conversion method and incineration method.
Overview of Air Pollution Treatment Skills Air pollution treatment skills are an important countermeasure for atmospheric environmental maintenance. Clean incineration technology is a general term for all the technologies that reduce pollutant emissions and use power of traveling fuel during the incineration process, including processing, incineration, conversion, and pollution emission control. Sulfur dioxide, nitrogen oxides and smoke (dust) are my country's primary air pollutants. Reducing the emission of sulfur dioxide, nitrogen oxides and smoke (dust) is concerned with maintaining and improving the atmospheric environment. Not only is it very important. And very urgent. Therefore, the following is an overview of the control skills of sulfur dioxide, nitrogen oxides and smoke (dust).
Clean incineration skills
Clean coal incineration technology refers to the ability of coal to be purified before combustion to reduce pollution emissions, travel power during the coal incineration process, and reduce pollutant emissions. It includes methods such as changing the nature of fuel, improving incineration methods, adjusting burning conditions, and appropriately participating in additives to control the generation of pollutants.
High chimney flue gas emission skills
The high chimney emission of flue gas is to directly discharge the flue gas containing pollutants into the atmosphere through the high chimney. It is the slack and dilution of pollutants to larger planning and farther areas. The purified and qualified flue gas is discharged into the atmosphere through the chimney. Use the effect of the atmosphere to further reduce the concentration of air pollutants on the ground.
Dust removal processing skills
Smoke (powder) dust purification technology is also called dust removal and purification technology. It can distinguish particulate pollutants from the exhaust gas and recover the operation process. The equipment that completes the process is called a purifier. There are various types of gaseous pollutants with different characteristics, so the purification methods selected are also different. Common methods include absorption, adsorption, catalysis, incineration, condensation, and membrane separation. , Electron beam irradiation purification method and biological purification method, etc.
The treatment of smoke (powder) dust is mainly completed by improving fuel technology and selecting dust removal technology.
1. Improve incineration skills
Particulates such as smoke and coal dust from thorough incineration are less than those from incomplete incineration. Therefore, the air supplied during the incineration process must be appropriate. The fuel is completely incinerated. The amount of air supplied is greater than the theoretical air calculated by the plate-forming reaction formula. If the amount of air supplied is small, it cannot be completely incinerated. If the amount of air supplied is too large, the temperature of the incinerator will be lowered and the amount of flue gas will be increased. Adequate mixing of air and fuel is the condition for complete burning.
2. Choose dust removal skills
This is a useful way to deal with smoke (dust). Dust removal skills can be divided into dry dust removal and wet dust removal according to whether liquid is involved in the dust removal process. Generally, based on the principle of particle separation in the dust removal process, dust removal skills can be roughly divided into: suction dust removal, inertial force dust removal, centrifugal dust removal, scrubbing dust removal, filter dust removal, electric dust removal, and sonic dust removal.
3. Choose a purifier reasonably
Reasonable selection of purifiers can not only ensure the purification and dust removal power required for qualified emissions, but also form the most economical purification system. In recent years, the dust removal technology has been opened up quickly, and the dust removal power has also improved significantly, especially electrostatic dust removal and bag dust removal. Therefore, for some projects that dominate air pollution and emit the largest smoke (dust) dust, such as large thermal power plants and large cement plants, electrostatic purifiers and industrial smoke and dust purifiers are often used. The dust removal power of industrial dust collectors can generally reach more than 98%, and it is widely used because of its high power, stable and reliable functions, and simple operation. In addition to industrial purifiers, other purifiers are also widely used due to their economy, convenience, and advanced features of dust removal power. The purifier is the process of ionizing the dust-containing gas through the high-voltage power plant, so that the dust particles are charged, and the dust particles are deposited on the dust collector under the action of the electric field force, and the dust particles are separated from the dust-containing gas. A kind of dust removal equipment. The fundamental difference between it and other dust removal processes is that the separating force (primarily electrostatic force) acts on the particles instead of the entire airflow. This is why it has low energy consumption for separating particles and low airflow resistance. Features. The primary benefit of the purifier is: low pressure loss and high trapping power for fine dust. It can be higher than 99%, and it can be operated under high temperature or strong corrosive gas.