Common purification methods of PP spray waste gas purification tower
What is the product of PP spray waste gas purification tower? Maybe many people don't know it very well. Here's a brief introduction of desulfurization PP spray waste gas purification tower manufacturer.
(1) absorption method
Absorption purification is an important and commonly used method in waste gas treatment. It is a method to separate harmful substances from waste gas and purify waste gas by using the different solubility of each mixed component in the selected absorbent, or the combination of one or more components and the active component in the absorbent.
The absorption equipment used mainly includes spray scrubber, foam scrubber, venturi scrubber and so on. The absorption process is similar to the wet dedusting process, except that the wet dedusting process uses clear water, while the absorption process uses solvent or absorption solution to purify harmful gases.
The advantage of absorption method is that it can deal with almost all kinds of harmful gases, has a wide range of application, and can recover valuable products. The disadvantage is that the process is relatively complex, sometimes the absorption efficiency is not high, and the absorption solution needs to be treated again, otherwise it will cause waste water pollution.
(2) activated carbon adsorption
Adsorption is a kind of solid surface phenomenon. It is a gaseous pollutant treated by porous solid adsorbent in activated carbon adsorption tower. One or several components are adsorbed on the solid surface under the action of molecular gravity or chemical bond force, so as to achieve the purpose of separation. Among them, activated carbon is widely used.
活性炭对对苯、甲苯、二甲苯、乙醇、煤油、汽油、苯乙烯、氯乙烯等物质都有吸附功能。活性炭净化装置具有较高的效率，但活性炭吸附到 量时会达到饱和， 或 换活性炭，因此运行成本较高。活性炭吸附设备常用于低浓度废气和脱臭的后处理。
Activated carbon has adsorption function for benzene, toluene, xylene, ethanol, kerosene, gasoline, styrene, vinyl chloride and other substances. The activated carbon purification device has high efficiency, but when the amount of activated carbon is absorbed, it will reach saturation, or change the activated carbon, so the operation cost is high. Activated carbon adsorption equipment is often used in the post-treatment of low concentration waste gas and deodorization.
(3) biological deodorization
Biological deodorization is to transform the substances with odor through the physiological metabolism of microorganisms, so as to achieve the purpose of deodorization. At present, the methods of biological treatment of waste gas in sewage treatment plant and sewage pump house mainly include soil deodorization, biological filter and biological trickling filter, etc. the treatment effect is good.
(4) low temperature plasma technology
Plasma is the fourth state of matter after solid, liquid and gas. When the applied voltage reaches the discharge voltage of gas, the gas is broken down and a mixture of electrons, various ions, atoms and free radicals is produced. Although the electron temperature is very high, the temperature of heavy particles is very low, and the whole system presents a low temperature state, so it is called low temperature plasma. The degradation of pollutants by low-temperature plasma is to use these active particles such as electrons and free radicals and the pollutants in the exhaust gas to decompose the pollutants in a short time. The method has the advantages of good treatment effect, low operation cost, no secondary pollution, stable operation, simple operation and management, ready to use and so on.
Common purification methods of PP spray waste gas purification tower
(5) ultraviolet (UV) catalytic oxidation
废气的UV光催化氧化装置处理机理包括两个过程：一是在产生 离子群体的过程中， 数量的有害气体分子受 作用，本身分解成单质或转化为无害物质。二是含有***量 粒子和高活性的自由基的离子群体，与分子气体(如H2S、甲苯等)作用，打开了其分子内部的化学键，转化为无害物质。新生态的氧离子具有很强的氧化性，能有效地氧化分解不受负离子作用控制的有机物。与废气反应后多余的氧离子(正)，能与氧离子(负)很快结合成中性氧。
The treatment mechanism of UV photocatalytic oxidation device for waste gas includes two processes: one is that in the process of generating ion groups, a number of harmful gas molecules are affected, and they are decomposed into simple substances or transformed into harmless substances. Second, the ion group containing a large number of particles and highly active free radicals, interacts with molecular gases (such as H2S, toluene, etc.), opens the chemical bond inside its molecules, and transforms into harmless substances. The new ecological oxygen ions have strong oxidizability, which can effectively oxidize and decompose the organic matters not controlled by the negative ions. After reacting with the waste gas, the excess oxygen ions (positive) can quickly combine with oxygen ions (negative) to form neutral oxygen.
UV catalysis is a deep reaction technology at room temperature. Photocatalytic oxidation equipment can oxidize organic pollutants in water, air and soil into harmless products at room temperature.
(6) RTO (regenerative hermaloxidizer)
RTO is a thermal oxidation decomposer, also known as a regenerative incinerator. Its basic principle is to oxidize the organic waste gas to CO2 and H2O at high temperature (≥ 760 ℃), so as to purify the waste gas and recover the heat released during decomposition, so as to achieve the dual purpose of environmental protection and energy saving. RTO is a kind of energy-saving environmental protection device which is used to treat middle and high concentration VOC waste gas. The main structure of RTO is composed of combustion chamber, ceramic packing bed and switch valve. The regenerative ceramic packed bed heat exchanger in the device can recover the heat energy to a large extent, and the heat recovery rate is more than 95%. There is little or no fuel used in VOC treatment. If low concentration waste gas is treated, concentration device can be selected to reduce combustion consumption.
RTO treatment technology is applicable to the purification of organic waste gas, coating waste gas, odor waste gas and other waste gas; it is applicable to the situation that the components of waste gas often change or the waste gas contains components (such as mercury, tin, zinc and other metal vapor, phosphorus, phosphide, arsenic, etc.) that make the catalyst toxic or activity decline, and it is easy to make the catalyst inactive; it contains halogen and a large amount of water vapor, containing halogen Hydrocarbons and other corrosive organic gases.
废气pp喷淋废气净化塔净化率高，净化率一般在98%以上。可实现全自动化控制，操作简单，运行稳定， 可靠性高。蓄热室内温度均匀分级增加，加强了炉内传热，换热效果 佳，炉膛容积小，降低了设备的造价。采用分级燃烧技术，延缓状燃烧下释出热能；炉内升温匀，烧
The purification rate of waste gas PP spray waste gas purification tower is high, and the purification rate is generally above 98%. It can realize full automatic control, simple operation, stable operation and high reliability. The temperature in the regenerator increases uniformly and hierarchically, which strengthens the heat transfer in the furnace, has good heat exchange effect, small furnace volume and reduces the cost of equipment. Adopt staged combustion technology to release heat energy under delayed combustion; raise the temperature in the furnace evenly and burn