低温等离子废气处理技术
技术简介
低温等离子废气处理技术，采用双介质阻挡放电形式产生等离子体，所产生等离子体的密度是其他技术产生等离子体密度的1500倍，最初用于氟利昂类、哈隆类物质的分解处理，后延伸至工业恶臭、异味、有毒有害气体处理。该技术节能、环保，应用范围广，所有化工生产环节产生的恶臭异味几乎都可以处理，并对二恶英有良好的分解效果。
等离子体工业废气处理技术已研制出标准化废气治理设备，利用所产生的高能电子、自由基等活性粒子激活、电离、裂解工业废气中的各组成份，使之发生分解，氧化等一些列复杂的化学反应，再经过多级净化，从而消除各种污染源排放的异味、臭味污染物，使有毒有害气体达到低毒化、无毒化，保护人类生存环境。由于其对污染物分子的高效分解且处理能耗低等特点，为工业废气的处理开辟了一条新的思路。
作用原理
低温等离子体是继固态、液态、气态之后的物质第四态，当外加电压达到气体的 放电电压时，气体被击穿，产生包括电子、各种离子、原子和自由基在内的混合体。放电过程中虽然电子温度很高，但重粒子温度很低，整个体系呈现低温状态，所以称为低温等离子体。低温等离子体降解污染物是利用这些高能电子、自由基等活性粒子和废气中的污染物作用，使污染物分子在极短的时间内发生分解，并发生后续的各种反应以达到降解污染物的目的。（注：低温等离子体相对于高温等离子体而言，属于常温运行。）
等离子体反应区富含极高的物质，如高能电子、离子、自由基和激发态分子等，废气中的污染物质可与这些具有较高能量的物质发生反应，使污染物质在极短的时间内发生分解，并发生后续的各种反应以达到讲解污染物的目的。与传统的电晕放电形势产生的低温等离子技术相比较，等离子体技术放电密度是电晕放电的1500倍，这就是传统低温等离子体技术治理工业废气99%以失败而告终的原因。
技术特点
与目前国内常用的异味气体治理方法相比较，等离子体工业废气处理技术具有以下特点：
低温等离子体技术应用于恶臭气体治理，具有处理效果好，运行费用低廉、无二次污染、运行稳定、操作管理简便、即开即用等优点。
①介质阻挡放电产生电子能量高，低温等离子体密度大，达到常用等离子技术（电晕放电）的1500倍，几乎可以和所有的恶臭气体分子作用；
②技术反应速度快，气体通过反应区的速度达到3-15米/秒，即达到很好的处理效果，其他技术气体通过反应区的速度0.01米/秒都很难达到的处理效果；
③气体通过部分，全部采用陶瓷、石英、不锈钢等防腐蚀材料，电极与废气不直接接触，根本上解决了低温等离子体技术设备腐蚀问题；其他技术是气体与电极直接接触，电极在3个月或1年内会造成严重腐蚀，即使通过的气体没有腐蚀性，自身所产生的臭氧也会把电极造成腐蚀；
④主机为成套工业废气处理装置，前面配有专用塔，能有效去除废气中的粉尘和水分，操作简单；
⑤自动化程度高，设备启动、停止十分迅速，随用随开，对于部分化工生产的不连续性，可以在生产时开启，不生产的间隙停止运行，大量的节约能源；
⑥运行成本较低，比常用的蓄热式燃烧炉RTO节约运行费用5-8倍，每立方米气量运行费用仅为0.3～0.9分钱，部分高浓度废气可以通过空气稀释后用技术处理；
⑦应用范围广阔，基本不受气温和污染物成分的影响，对恶臭异味的臭气浓度有良好的分解作用，恶臭异味的去除率达80-98%，处理后的气体臭气浓度达到国家标准；
⑧技术处理工业废气技术不是水洗技术，是通过高能量等离子体对污染物的直接击穿和直接轰击，使分子链断裂，并非污染物的转移；
⑨重要特点：以非甲烷总烃为例，用色谱法检测，非甲烷总烃去除率也许只有45%，但恶臭异味的去除率达93%。这是因为非甲烷总烃经过处理后，部分分子变成小分子，用色谱法检测时，依然表现为非甲烷总烃；恶臭异味的去除率高，表明实际已经分解了93%以上的污染物质，因为分解后的物质也有部分有异味；
⑩解决了二恶英这个世界难题，二恶英类物质含有氯，多数是亲电子基团，更容易被电子轰击。
Brief introduction of Technology
Exhaust treatment technology of low temperature plasma, using double dielectric barrier discharge produced plasma generated by plasma density is 1500 times that of other techniques to produce plasma density, initial treatment for the decomposition of freon and jalon substances, later extended to industrial odor, odor, toxic and harmful gas treatment. The technology is energy saving, environmental protection, wide range of applications, all chemical production process of odor, odor can be almost all treatment, and dioxin has a good decomposition effect.
Plasma industrial waste gas treatment technology has developed a standardized waste gas treatment equipment, the use of high-energy electrons, free radicals generated by active particle activation, industrial components in the exhaust gas ionization, cracking, the decomposition, oxidation and other complex chemical reaction after multi-stage purification, so as to eliminate emissions various sources of pollution, odor odor pollutants, toxic and harmful gases to achieve low toxicity, non-toxic, protecting environment for human survival. Because of its high efficiency of decomposition of pollutants and low energy consumption, it opens up a new way for the treatment of industrial waste gas.
Action principle
Low temperature plasma is the fourth state material after solid, liquid and gas, when the applied voltage reaches the discharge voltage of gas, gas breakdown, produce mixture including electron, ions, atoms and free radicals. Although the electron temperature is very high in the discharge process, the temperature of heavy particles is very low, and the whole system presents a low temperature state, so it is called the low temperature plasma. Low temperature plasma degradation of pollutants pollutants using these high-energy electrons, free radicals and particles in the waste, the pollutant molecules in a very short time decomposition, and various subsequent responses to achieve the purpose of pollutants degradation. (Note: low temperature plasma belongs to normal temperature operation relative to high temperature plasma)
Rich plasma reaction zone of high material, such as high-energy electrons, ions and free radicals and excited molecules, pollutants in the exhaust gas can react with the high energy of the material, so that the pollutants occurred in a very short period of time and the occurrence of subsequent decomposition, reaction to achieve the purpose of pollutants on. Low temperature plasma technology and corona discharge situation compared with the traditional technology, the plasma discharge density is 1500 times of corona discharge, which is why the traditional low temperature plasma technology of industrial waste treatment failed in 99%.
Technical characteristics
With the current domestic common odor treatment method compared to plasma industrial waste gas treatment technology has the following characteristics:
Low-temperature plasma technology was applied to the treatment of malodorous gas, has good treatment effect, low running cost, no two pollution, stable operation, simple operation and management, which advantages in.
Of dielectric barrier discharge electron energy is high, low temperature plasma density, plasma technology to achieve common (Corona) 1500 times, almost all of the functions and malodorous gas molecules;
Technical reaction speed, gas through the reaction zone can reach the speed of 3-15 M / s, which is to achieve a good treatment effect, other technology of gas through the reaction zone of the speed of 0.01 M / s are difficult to achieve treatment effect;
The gas through the part, using all ceramic, quartz, stainless steel and other corrosion resistant materials, electrode is not in direct contact with the gas, to solve the problem of equipment corrosion in the low temperature plasma technology; other technology is in direct contact with the gas and the electrode, the electrode caused serious corrosion in 3 months or 1 years, even through the no corrosive gas, the ozone generated by the electrodes will cause corrosion;
The host for the complete industrial waste gas treatment device, equipped with a special front tower, can effectively remove dust and moisture in the exhaust gas, simple operation;
, high degree of automation, equipment start and stop very quickly, with the open, for the discontinuous part of chemical production, can be opened at the time of production, the production gap does not stop running, saving a lot of energy;
The operation cost 6 is lower than the commonly used regenerative combustion furnace RTO save running costs 5-8 times per cubic meter of gas operation cost is only 0.3 to 0.9 cents, part of the high concentration of the exhaust gas through the air can be diluted with processing technology;
The scope of application of and broad, basically not affected by the temperature and composition of pollutants and odor concentration of foul smell has decomposition effect, the removal rate of 80-98% of the foul smell, odor gas concentration after treatment to reach the national standard;
Technology and treatment of industrial waste gas washing technology is not technology, through the high energy plasma of pollutants directly breakdown and direct bombardment, the molecular chain rupture, transfer of pollutants is not;
An important feature of 9: non methane hydrocarbons were detected by chromatography, non methane total hydrocarbon removal rate may be only 45%, but the removal rate of 93% foul smell. This is because the non methane hydrocarbons after treatment, some molecules into small molecules, detected by chromatography, is mainly non methane hydrocarbons; foul smell removal rate is high, that actual have broken down more than 93% polluting substances, because after the decomposition of the material are also part of the smell;
Solves the problems of this world of dioxins, dioxins containing chlorine, mostly electrophilic group, more easily by electron bombardment.
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