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  • VOC废气处理技术有哪些
  • 本站编辑:杭州瑞茂环保技术有限公司发布日期:2018-08-08 10:37 浏览次数:

当前,VOC废气处理技术主要包括热破坏法、变压吸附分离与净化技术、吸附法和氧化处理方法等。

At present, VOC waste gas treatment technology mainly includes thermal destruction, pressure swing adsorption separation and purification technology, adsorption and oxidation treatment methods。

一、热破坏法

1。 Thermal damage method

热破坏法是指直接和辅助燃烧有机气体,也就是VOC,或利用合适的催化剂加快VOC的化学反应,最终达到降低有机物浓度,使其不再具有危害性的一种处理方法。

Thermal damage method refers to the direct and auxiliary combustion of organic gas, that is, VOC, or the use of appropriate catalysts to accelerate the chemical reaction of VOC, and ultimately to reduce the concentration of organic matter, so that it is no longer a harmless treatment.

技术|七大VOC废气处理技术

VOC waste gas treatment technology

热破坏法对于浓度较低的有机废气处理效果比较好,因此,在处理低浓度废气中得到了广泛应用。这种方法主要分为两种,即直接火焰燃烧和催化燃烧。直接火焰燃烧对有机废气的热处理效率相对较高,一般情况下可达到99%。而催化燃烧指的是在催化床层的作用下,加快有机废气的化学反应速度。这种方法比直接燃烧用时更少,是高浓度、小流量有机废气净化的首选技术。

Thermal destructive method has a good effect on the treatment of low concentration organic waste gas, so it has been widely used in the treatment of low concentration waste gas。 This method is mainly divided into two types: direct flame combustion and catalytic combustion。 Direct flame combustion has relatively high heat treatment efficiency for organic waste gas, and can reach 99% under normal conditions。 Catalytic combustion refers to accelerating the rate of chemical reaction of organic waste gas under the action of catalytic bed。 This method is less than direct combustion, and is the preferred technology for purification of organic waste gas with high concentration and low flow rate。

二、吸附法

Two, adsorption method

大发棋牌下载有机废气中的吸附法主要适用于低浓度、高通量有机废气。现阶段,这种有机废气的处理方法已经相当成熟,能量消耗比较小,但是处理效率却非常高,而且可以彻底净化有害有机废气。实践证明,这种处理方法值得推广应用。

Organic waste gas adsorption method is mainly suitable for low concentration and high flux organic waste gas. At this stage, the treatment method of this organic waste gas is quite mature, the energy consumption is relatively small, but the treatment efficiency is very high, and it can thoroughly purify the harmful organic waste gas. Practice has proved that this method is worthy of popularization and application.

技术|七大VOC废气处理技术

VOC waste gas treatment technology

但是这种方法也存在一定缺陷,它需要的设备体积比较庞大,而且工艺流程比较复杂;如果废气中有大量杂质,则容易导致工作人员中毒。所以,使用此方法处理废气的关键在于吸附剂。当前,采用吸附法处理有机废气,多使用活性炭,主要是因为活性炭细孔结构比较好,吸附性比较强。

But this method also has some defects, it needs a large volume of equipment, and the process is more complex; if there is a large amount of impurities in the waste gas, it is easy to cause the workers to be poisoned。 Therefore, the key to treating waste gas by this method is adsorbent。 At present, the use of activated carbon in the treatment of organic waste gas by adsorption is mainly due to its fine pore structure and strong adsorption。

此外,经过氧化铁或臭氧处理,活性炭的吸附性能将会更好,有机废气的处理将会更加安全和有效。

In addition, the adsorption performance of activated carbon will be better after iron oxide or ozone treatment, and the treatment of organic waste gas will be more safe and effective.

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三、生物处理法

大发棋牌下载Three. Biological treatment

从处理的基本原理上讲,采用生物处理方法处理有机废气,是使用微生物的生理过程把有机废气中的有害物质转化为简单的无机物,比如CO2、H2O和其它简单无机物等。这是一种无害的有机废气处理方式。

From the basic principle of processing, the use of biological treatment to treat organic waste gas is the use of microbial physiological processes to convert harmful substances in organic waste gases into simple inorganic substances, such as CO2, H2O and other simple inorganic substances. This is a harmless treatment of organic waste gas.

技术|七大VOC废气处理技术

VOC waste gas treatment technology

一般情况下,一个完整的生物处理有机废气过程包括3个基本步骤:

Generally speaking, a complete biological treatment of organic waste gas includes 3 basic steps.

a)有机废气中的有机污染物首先与水接触,在水中可以迅速溶解;

大发棋牌下载A) organic pollutants in organic waste gas first contact with water and can be dissolved rapidly in water。

b)在液膜中溶解的有机物,在液态浓度低的情况下,可以逐步扩散到生物膜中,进而被附着在生物膜上的微生物吸收;

B) the dissolved organic matter in the liquid film can gradually spread into the biofilm, and then be absorbed by the microorganism attached to the biofilm under the condition of low liquid concentration.

c)被微生物吸收的有机废气,在其自身生理代谢过程中,将会被降解,最终转化为对环境没有损害的化合物质。

C) Organic waste gases absorbed by microorganisms will be degraded during their own physiological metabolism and eventually converted into compounds that do not harm the environment.

四、变压吸附分离与净化技术

Four, pressure swing adsorption separation and purification technology

变压吸附分离与净化技术是利用气体组分可吸附在固体材料上的特性,在有机废气与分离净化装置中,气体的压力会出现一定的变化,通过这种压力变化来处理有机废气。

Pressure swing adsorption separation and purification technology is a characteristic of adsorption on solid materials by using gas components。 In organic waste gas and separation purification equipment, the pressure of gas will change to a certain extent, and the organic waste gas can be treated by this pressure change。

技术|七大VOC废气处理技术

VOC waste gas treatment technology

大发棋牌下载PSA技术主要应用的是物理法,通过物理法来实现有机废气的净化,使用材料主要是沸石分子筛。沸石分子筛,在吸附选择性和吸附量两方面有一定优势。在一定温度和压力下,这种沸石分子筛可以吸附有机废气中的有机成分,然后把剩余气体输送到下个环节中。在吸附有机废气后,通过一定工序将其转化,保持并提高吸附剂的再生能力,进而可让吸附剂再次投入使用,然后重复上步骤工序,循环反复,直到有机废气得到净化。

The main application of PSA technology is physical method, through physical method to achieve the purification of organic waste gas, mainly using zeolite molecular sieves. Zeolite molecular sieve has certain advantages in two aspects of adsorption selectivity and adsorption capacity. At a certain temperature and pressure, the zeolite molecular sieve can absorb the organic components in the organic waste gas, and then transfer the remaining gas to the next step. After the adsorption of organic waste gas, it is converted through a certain process to maintain and improve the regenerative capacity of the adsorbent, and then the adsorbents can be reinvested again, and then repeated steps are repeated until the organic waste gas is purified.

近年来,该技术开始在工业生产中应用,对于气体分离有良好效果。该技术的主要优势有:能源消耗少、成本比较低、工序操作自动化及分离净化后混合物纯度比较高、环境污染小等。使用该技术对于回收和处理有一定价值的气体效果良好,市场发展前景广阔,成为未来有机废气处理技术的发展方向。

In recent years, the technology has been applied in industrial production and has good effect on gas separation. The main advantages of this technology are: low energy consumption, low cost, automation of process operation, high purity of mixture and small environmental pollution after separation and purification. The use of this technology is good for the recovery and treatment of gas with a certain value, the market has a broad prospects for development, and become the future direction of the development of organic waste gas treatment technology.


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