The main methods of exhaust gas treatment
One, catalytic oxidation method: photocatalytic exhaust gas treatment equipment technology is the use of special ultraviolet wavelengths (C-band), in the special catalytic oxidant under the action of the exhaust molecules crushed and further oxidation and reduction of a special treatment method. Exhaust gas molecules first through the special band of ultraviolet light waves broken organic molecules, interrupting its molecular chain; at the same time, through the decomposition of oxygen and water in the air, to get a high concentration of ozone, ozone further absorption of energy, the formation of oxidizing performance of higher free hydroxyl, oxidation of exhaust gas molecules. At the same time, according to different exhaust gas composition configuration of a variety of composite inert catalyst, greatly improve the speed and efficiency of exhaust gas treatment, so as to achieve the purpose of purification of exhaust gas.
The main method of exhaust gas treatment - catalytic oxidation method
The main method of exhaust gas treatment two, masking method: the use of more intense aromatic odors and odors mixed with the odor, in order to mask the odor, so that it can be accepted;
The main method of exhaust gas treatment three, condensation and recovery method: the condensation method of using a multi-stage continuous cooling method, so that the temperature of the hydrocarbons in the mixture of the various components of the oil and gas Below the condensation point from the gaseous state into liquid state, in addition to water vapor air remains gaseous, thus realizing the separation of oil and gas and air, valuable organic matter can be recovered;
The main method of waste gas treatment, soil deodorization: soil deodorization mechanism can be divided into physical adsorption and biological decomposition of two categories, water-soluble malodorous gases (eg, amines, hydrogen sulfide, low-grade fatty acids, etc.) by the absorption of soil water removal, while non-soluble odors are absorbed and removed, while the non-soluble odors are removed. Water-soluble malodorous gases (such as amines, hydrogen sulfide, low-grade fatty acids, etc.) are absorbed by the water in the soil and removed, while non-soluble odors are physically adsorbed on the soil surface and then decomposed by microorganisms in the soil. Advantages: low maintenance costs, deodorizing effect is comparable to activated carbon;
The main method of waste gas treatment V. Dilution and diffusion method will be odorous gases discharged to the atmosphere through the chimney, or diluted with odorless air, reduce the concentration of malodorous substances in order to reduce the odor;
The main method of waste gas treatment VI. Adsorption method: the use of adsorbents to adsorb the odorant substances from the gas phase to the solid phase transfer.
The main method of waste gas treatment - adsorption method
The main method of waste gas treatment VII, biological method: the use of microorganisms in the life process of the gaseous pollutants in the waste gas decomposition into less or even harmless substances. There are a variety of microorganisms in nature, almost all inorganic and organic pollutants can be converted;
The main method of exhaust gas treatment eight, direct combustion method: organic exhaust gas into the combustion chamber, direct contact with the flame combustion, combustion and decomposition of combustible components in the exhaust gas a method. This method is divided into two types of combustion without and with auxiliary fuel. If the concentration of combustible pollutants in the exhaust gas is high, the calorific value is large, and the combustion temperature can be maintained only by burning the exhaust gas (higher than 800 ℃), then the former is selected. Combustible pollutants in the exhaust gas concentration is low, the calorific value of small, need to add auxiliary fuels to maintain the combustion temperature (600 ~ 800 ℃) is to choose the latter;
The main method of exhaust gas treatment nine, exhaust gas scrubbing method: scrubber tower is a waste gas treatment technology, industrial waste gas such as acid mist exhaust treatment, alkali mist exhaust treatment and paint exhaust treatment, spray paint exhaust treatment, organic exhaust treatment of the absorption of the solvents, chemical Waste gas adsorption, oxidation and reduction, acid and alkali neutralization has obvious efficacy, to achieve the second level of waste gas emission standards.
The main method of exhaust gas treatment - exhaust gas scrubbing method
The main method of exhaust gas treatment ten, thermal combustion method: the use of regenerative thermal oxidizing furnace RTO for the treatment of organic waste gas, you can achieve the double effect of energy saving;
The main method of exhaust gas treatment eleven, water absorption method: the use of odor in the water soluble nature of certain substances, so that the odor components directly with the water, thus dissolved in water. Water contact, so that dissolved in water to achieve the purpose of deodorization;
The main method of waste gas treatment XII, adsorption, catalytic combustion method: this method uses honeycomb activated carbon adsorption, in the activated carbon close to the drink and the introduction of hot air for desorption, resolution, desorption of waste gas into the catalytic combustion bed flameless combustion, to purify;
The main method of waste gas treatment XIII, low-temperature plasma: Under the action of an external electric field, the waste gas can be removed and cleaned by the use of low-temperature plasma. Under the action of the applied electric field, the electrons in the electrode space get energy to accelerate the movement, thus triggering a series of complex physical and chemical reactions such as excitation, dissociation or ionization, which makes the chemical bond of the odorous group broken, and then after multi-stage purification to achieve the purpose of deodorization. Advantages: simple process, simple operation, wide gas temperature (-50-80 ℃).