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活性炭吸附净化装置在涂装印刷行业的应用

  有0人浏览   日期:2019-08-13

文章摘要: 现阶段国内常见到的涂装工艺涂料关键是由树脂、助剂、颜填料、溶剂所构成,其中成膜物质关键包括树脂、颜填料,溶剂关键起稀释、混和、分散树脂、颜填料的作用,使树脂与颜填料充分混和、不凝聚,减少沉降速率。......

首先我们先来了解下涂装工艺生产线常见的涂料原料都是哪些成份构成,有机废气成分是怎样产生的?

First of all, let's know what ingredients are common paint raw materials in the painting process production line, and how the organic waste gas components are produced.

现阶段国内常见到的涂装工艺涂料关键是由树脂、助剂、颜填料、溶剂所构成,其中成膜物质关键包括树脂、颜填料,溶剂关键起稀释、混和、分散树脂、颜填料的作用,使树脂与颜填料充分混和、不凝聚,减少沉降速率。

At present, the key of coating technology commonly seen in China is composed of resins, additives, pigments and fillers, and solvents. The key of film-forming material includes resins, pigments and fillers. Solvents play the roles of dilution, mixing, dispersing resins and pigments and fillers, so that the resins and pigments can be fully mixed and not coagulated, and the sedimentation rate can be reduced.

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现阶段汽车涂料所采用溶剂的关键成份为苯、甲苯、乙苯、二甲苯、乙酸乙酯、乙酸丁酯等,涂料在喷涂、蒸发、烘干操作过程中溶剂、助剂会渐渐蒸发出去,产生工业废气(VOCs)。在汽车涂装操作过程中产生的工业废气关键有喷涂工业废气和烘干工业废气,随着涂料的类型及涂装工艺方法的差异,挥发到空气中的溶剂占涂料总使用量的20%~80%。

At present, the key components of solvents used in automotive coatings are benzene, toluene, ethylbenzene, xylene, ethyl acetate, butyl acetate, etc. Solvents and additives will gradually evaporate during spraying, evaporation and drying operations, resulting in industrial exhaust gases (VOCs). The key industrial exhaust gas produced in automobile painting operation is spraying industrial exhaust gas and drying industrial exhaust gas. With the difference of coating type and coating process, the solvent volatilized into the air accounts for 20%-80% of the total amount of paint used.

通过对汽车涂装生产线进行监测得知,在涂装工艺车间内可监测出15种有机化合物。

Through the monitoring of automobile painting production line, 15 kinds of organic compounds can be monitored in the painting workshop.

这些有机废气排放到空气中,在一定条件下运用光化学反应,对臭氧层造成严重威胁,影响空气质量,同时若长久在含有高浓幅度工业废气环境中工作,会损伤人的中枢神经系统严重危害作业人员的身心健康。

These organic exhaust gases are discharged into the air. Under certain conditions, photochemical reactions are used to pose a serious threat to the ozone layer and affect the air quality. At the same time, if they work in the environment with high concentration of industrial exhaust gases for a long time, they will damage the human central nervous system and seriously endanger the physical and mental health of workers.

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近些年,从国家到地方,均越来越高度重视生态环境问题,不同地区在根据国家行业标准的基础上均不同程度的施行了应对涂装工艺行业的有机废气排放控制标准,在标准内部对VOC大允许排放标准浓度值及排放标准总量均作出严格要求。运用标准的严格实施,推动有关企业对环保设施进行改造及产品升级,并推动行业的技术进步。

In recent years, more and more attention has been paid to the ecological environment from the national to the local level. On the basis of the national industry standards, different regions have implemented different levels of emission control standards to deal with the organic exhaust emissions from painting process industries. Within the standards, the concentration and emission of VOC are allowed. The total amount of standard is strictly required. Strict implementation of standards will be used to promote the transformation of environmental protection facilities and product upgrading by relevant enterprises, and to promote technological progress in the industry.

现阶段涂装工艺行业应对工业废气较为常见的处理方式有活性炭吸附、UV光解、吸附浓缩+催化燃烧、蓄热式焚烧炉等,今天我们主要了解下活性炭吸附工艺:

At present, the common treatment methods for industrial waste gas in coating industry are activated carbon adsorption, UV photolysis, adsorption concentration + catalytic combustion, regenerative incinerator and so on. Today we mainly understand the activated carbon adsorption process.

活性炭吸附工艺:

Activated carbon adsorption process:

活性炭吸附设备主要应对喷涂工业废气,运用活性炭比表面积(500~1700 m2/g)大,孔隙发达、表层官能团丰富和活性高、具有出色的吸附特性等特点,能够将有机溶剂蒸气分子结构吸附在其表层,进而做到减少工业废气浓度值的目地,是有机废气处理中运用非常广泛的方法。

Activated carbon adsorption equipment mainly deals with industrial waste gas from spraying industry. It can adsorb the molecular structure of organic solvent vapor on its surface by using the characteristics of large specific surface area of activated carbon (500-1700 m2/g), developed pore, rich surface functional groups and high activity, and excellent adsorption characteristics, so as to reduce the concentration value of industrial waste gas. The purpose of this study is to find a very wide range of methods for organic waste gas treatment.

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现阶段,在常见的活性炭吸附装置中通常会设置过滤装置和冷却器,对工业废气进行预处理,进而去除工业废气中的漆雾和水分,并将工业废气降低至合适的温度,以保证活性炭不被阻塞,保证装置的安全性能。

At present, filter devices and coolers are usually installed in common activated carbon adsorption devices to pretreat industrial exhaust gas, then remove paint mist and water from industrial exhaust gas, and reduce industrial exhaust gas to the appropriate temperature to ensure that activated carbon is not blocked and the safety performance of the device is guaranteed.

预处理后的工业废气经由活性炭吸附床,工业废气中的有机化合物分子结构会填充在活性炭表层的的孔穴中被吸附在表层,从左到工业废气分离的目地,实现净化功效。

The pretreated industrial waste gas is adsorbed by activated carbon adsorption bed, and the molecular structure of organic compounds in industrial waste gas will be filled in the holes on the surface of activated carbon and adsorbed on the surface. From left to the purpose of separation of industrial waste gas, the purification effect will be realized.

由于活性炭吸附归属于物理去除法,活性炭的吸附效率会随着吸附量的增多逐渐衰减,当吸附饱合之后,活性炭的孔隙会被有机分子结构阻塞,进而失去吸附能力,这时就需要对活性炭进行更换或是脱附处置,使之再次具有吸附功效。

Because the adsorption of activated carbon belongs to physical removal method, the adsorption efficiency of activated carbon will gradually decrease with the increase of adsorption capacity. When the adsorption is saturated, the pore of activated carbon will be blocked by organic molecular structure, and then the adsorption capacity will be lost. At this time, it is necessary to replace or desorb activated carbon to make it have adsorption again. Affiliated efficacy.

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经检测,现阶段常见的活性炭的吸附效率为87%,经活性炭吸附后,工业废气的浓度值可减少30%~50%。

The adsorption efficiency of activated carbon is 87%, and the concentration of industrial waste gas can be reduced by 30%-50% after adsorption by activated carbon.

此方法具有装置简单、投资小、处理量大等优势,适合运用在喷涂量较小,浓度值低,工业废气成分较为简单的喷涂环境中。

This method has the advantages of simple installation, small investment and large amount of treatment. It is suitable for spraying environment with small amount of spraying, low concentration and simple industrial waste gas composition.

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Thank you for your reading and watching. The wonderful content of this article comes from: B2B e-commerce platform. We will continue to show you more wonderful content. For more details, please click: http://www.lushangyun.com.


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