Waste gas treatment equipment is mainly the use of different technologies, to reduce the harmful ingredients emissions through recycling or removal, reach a kind of environmental protection equipment to protect the environment, clean air, make our environment from being polluted.
Classification of waste gas treatment equipment:
[absorption equipment]
Absorption method uses low volatile or non-volatile solvent to absorb VOCs, and then use VOCs and absorbent physical properties of separation.
VOCs containing gas from the bottom of the absorption tower into the tower, in the rising process and from the top absorbent countercurrent contact the purified gas discharged from the tower. Absorption of VOCs absorber through the heat exchanger after entering the stripper top, the temperature is higher than the absorption temperature or pressure is lower than the absorption desorption pressure conditions. After desorption, the absorbent returns to the absorption tower after condensation through the solvent condenser. VOCs gas desorbed through the condenser, a gas-liquid separator with pure VOCs gas leaving the stripper, be recycled. The process is suitable for gas purification with higher VOCs concentration and lower temperature, and other processes need to be adjusted accordingly.
[adsorption equipment]
In the use of porous solid material processing fluid mixture, fluid in one component or some components may be absorbed and concentrated on the surface, this phenomenon is known as adsorption. Adsorption of waste gas, the adsorption of the object is gaseous pollutants, gas-solid adsorption. The adsorbed gas component is called adsorbate and porous solid substance is called adsorbent.
After the adsorbate is adsorbed on the solid surface, a adsorbed adsorbate can be separated from the surface of the adsorbent. When a period of time after adsorption, due to surface adsorbate concentration, the adsorption capacity decreased significantly while the adsorption purification requirements, the need to adopt some measures to make the adsorbate has adsorption desorption, the adsorption capacity of CO, a process known as adsorbent regeneration. Therefore, in the actual adsorption engineering, it is the use of adsorption recycling process of repeated adsorption to achieve removal of pollutants in the exhaust gas and recovery of useful components in the exhaust gas.
Organic waste gas combustion and catalytic purification equipment
Combustion method is very effective in treating high concentrations of Voc and odorous compounds, the principle is to use excessive air to make these impurities burning, most of the carbon dioxide and water vapor generated, can be discharged into the atmosphere. But when the treatment of chlorinated organic compounds and sulfur, combustion HCl or SO2 production, need further processing of combustion gas. Jiangsu waste gas treatment equipment manufacturers
[industrial organic waste gas low-temperature plasma treatment equipment]
The plasma is a ionized gas, the English name is plasma, it was named by the American science Muir, in 1927 to study the phenomenon of discharge of mercury vapor at low pressure. The plasma consists of a large number of atoms, neutral atoms, excited atoms, photons and free radicals, but the number of electrons and positive ions must be electrically neutral, which is the meaning of "plasma". The plasma has many different aspects of electricity and electromagnetism, which is different from solid, liquid and gas, so some people call it the fourth state of matter. According to the state, temperature and ion density, plasma can be divided into high temperature plasma and low temperature plasma (body and cold plasma). The high temperature plasma ionization degree of various particle temperature close to 1, almost the same system in thermodynamic equilibrium, it is mainly used in the study of controlled thermonuclear reaction. While the low temperature plasma learns non-equilibrium state, the temperature of various particles is not the same. The electron temperature (Te) = ion temperature (Ti), more than 104K, and the ion and neutral particle temperature can be as low as 300 ~ 500K. The general gas discharge electron belongs to low temperature plasma.
As of 2013, the mechanism of low temperature plasma was considered as the result of particle inelastic collision. Low temperature plasma rich in electrons and ions, free radicals and excited molecules, including high-energy electrons and gas molecules (atoms) collision, which converts energy into ground state molecules (atoms) can occur, excitation, dissociation and ionization and a series of straw in the activated state. On the one hand to open the gas molecular bond, to generate some single molecules and solid particles; the other one of.OH, H2O2. and other free radicals with strong oxidation of O3 in high-energy electron plays a decisive role in this process, the thermal motion of ions only side effects. Under atmospheric pressure, the electron temperature level in the highly nonequilibrium plasma generated by gas discharge is much higher than the gas temperature (around 100 C). The chemical reaction of various types in non equilibrium plasma, mainly depends on the electron mean energy, electron density, gas temperature, harmful gas concentration and gas composition is more than. The need for some large activation energy of the reaction such as the removal of refractory pollutants in the atmosphere can also be provided for low concentration, high velocity, large volume containing volatile organic pollutants and sulfur pollutant treatment.
Methods plasma generated common is gas discharge, the gas discharge is through some kind of mechanism to make an electron out of gas ionization of atoms or molecules in the gas medium formed called ionized gas, if gas ionization produced by the electric field and the formation of conduction current, this phenomenon is called gas discharge. According to the mechanism of the discharge, the properties of the gas pressure J source and the geometry of the electrode, the gas discharge plasma can be divided into the following forms: glow discharge; dielectric barrier discharge;