油墨印刷废气处理介绍 Ink printing waste gas treatment introduction

   有机废气、烟气对人体、生产、产品质量、经济效益、环境、自然景物的美观、生态平衡都有影响。危害的严重程度取决于散发的气量，废气的物理、化学性质，以及周围的情况。对人体的危害，一个成年人每天大约需要19m3空气，以便从中取得所需的氧气。如果工人工作地点(又称作业点或工作区)的空气中含有大量废气，当吸入达到一定数量时，就能引起肺组织及其他纤维化病变，导致多种疾病。也是影响环境和空气质量之首。印刷机在印刷过程中，油墨产生的三苯有机废气，影响厂区工作人员的身体健康。

1、吸收法

  吸收法可分为化学吸收和物理吸收，大部分有机废气不宜采用化学吸收。物理吸收的吸收剂应具有与吸收组分有较高的亲和力，低挥发性，同时还应具有较小的挥发性，吸收液饱和后经解析或精馏后重新使用。本法适用于具有可溶性的有机废气，且吸收剂具有廉价高效的特点，也常作为废气治理过程中的预处理过程，同时可起到冷却降温、预除尘的作用。

2、燃烧法

  本法亦称为热氧化法、热力燃烧法，主要用于有机物高浓度废气的净化。对于自身不能燃烧的中低浓度尾气，通常需助燃剂或加热，能耗大，运行成本比催化燃烧法高10倍以上；运行技术要求高，不易控制与掌握。此法在国内基本上未获推广，仅有少数厂家引进国外治理设备运用于较高浓度和温度的制罐印铁业废气治理中，但终因能耗大及运行不稳定，难以正常运转。

3、催化燃烧法

  该法的优点是催化燃烧为无焰燃烧，安全性好，本法的特点：起燃温度低，节约能源，净化率高，无二次污染；工艺简单，操作方便，安全性好；装置体积小，占地面积少；设备的维修与折旧费较低。该法适用于高温、中高浓度的有机废气治理，国内外已有广泛使用的经验，效果良好。

4、吸附法

   有机废气通过活性炭的吸附，可达到95%的净化率，吸附法设备简单、投资小。活性炭达到饱和时吸附量约30%，应用于净化设备可取20-25%的吸附量。该工艺适用于中低浓度，中小风量的有机废气治理，是目前国内治理“三苯”有机废气成熟的使用方法。对于本方案中风量不大、较低浓度的混合有机废气比较适合选用该工艺。

5、生物净化法

  该法基于成熟的生物处理污水技术上发展起来，具有能耗低、运行费用少的特点，在国外有一定规模的运用。其缺点在于污染物在传质和消解过程中需要有足够的停留时间，从而增大了设备的占地，同时由于微生物具有一定的耐冲击负荷限值，增加了整个处理系统在启停时的控制或维护困难。该法目前在国内污水站废气治理中有少量运用，对于工业废气中治理的运用很少。

6、膜分离法

  该法是利用有机蒸汽与空气透过膜的能力的不同而使二者分开。该法适用于处理较浓的废气（≥1000mg/m3），目前投资和运行成本等费用都高，尚处于实验研究阶段。

7、光催化法

  光催化净化是基于光催化剂在紫外线照射下具有的氧化还原能力而净化污染物。利用光催化净化技术去除空气中的有机污染物具有以下特点：

（1）直接用空气中的氧气做氧化剂，反应条件温和（常温常压）

（2）可以将有机污染物分解为二氧化碳和水等无机小分子，净化效果彻底。

  光催化净化技术具有室温深度氧，二次污染小，运行成本低和可望利用太阳光为反应光源等优点，所以光催化特别合适室内挥发有机物的净化，在深度净化方面显示出了巨大的应用潜力。

   上海永爱健净化设备有限公司专业提供组合式VOCs废气处理新技术及设备。致力成为一家集研发设计、设备制造、工程承包及运营管理于一体的企业。公司拥有环境污染治理总承包资质、环境工程专项设计及多个相关专利证书，是环保协会会员单位。

 Organic waste gas, flue gas on human body, production, product quality, economic benefits, environment, natural scenery beauty, ecological balance are affected. The severity of the hazard depends on the amount of gas released, the physical and chemical nature of the waste gas, and the circumstances surrounding it. To the detriment of the human body, an adult needs about 19m3 of air a day to get the oxygen it needs. If a worker is working at a place of work or... // organic waste gas and flue gas have impacts on human body, production, product quality, economic benefits, environment, natural scenery beauty and ecological balance. The severity of the hazard depends on the amount of gas released, the physical and chemical nature of the waste gas, and the circumstances surrounding it. To the detriment of the human body, an adult needs about 19m3 of air a day to get the oxygen it needs. If the air at a worker's place of work (also known as a work station or work area) contains large amounts of waste gas, when inhaled to a certain amount, it can cause lung tissue and other fibrotic lesions, leading to a variety of diseases. It is also the first to affect the environment and air quality. In the printing process, the printing ink produced triphenyl organic waste gas, affecting the health of the factory staff. 1. Absorption
Absorption can be divided into chemical absorption and physical absorption, most organic waste gas should not be used chemical absorption. The absorbent of physical absorption should have a high affinity with the absorbed component and a low volatility, while at the same time, it should also have a low volatility. The absorbent should be saturated and reapplied after analysis or rectification. This method is applicable to soluble organic waste gas, and the absorber is cheap and efficient. It is also often used as a pretreatment process in waste gas treatment, and can play a role in cooling, cooling and pre-dust removal.
2. Combustion method
This method, also known as thermal oxidation method and thermal combustion method, is mainly used for the purification of organic high concentration waste gas. For the medium and low concentration exhaust gas which cannot be burned by itself, usually the combustion agent or heating is required. The energy consumption is high, and the operation cost is more than 10 times higher than that of the catalytic combustion method. High technical requirements for operation, difficult to control and master. This method has not been popularized in China basically, only a few manufacturers introduce foreign treatment equipment to use in the treatment of waste gas of the canning printing iron industry with higher concentration and temperature, but it is difficult to operate normally due to large energy consumption and unstable operation.
3. Catalytic combustion method
The advantages of this method are that the catalytic combustion is non-flame combustion with good safety and the features of this method are: low starting temperature, energy saving, high net rate and no secondary pollution; Simple process, convenient operation and good safety; The device is small in size and occupies less space. Equipment maintenance and depreciation cost is low. The method is applicable to the treatment of high temperature and high concentration organic waste gas.
4. Adsorption
Organic waste gas can reach 95% net rate through adsorption of activated carbon. The adsorption amount of activated carbon is about 30% when it reaches saturation, 20-25% when it is applied to purification equipment. This process is suitable for the treatment of organic waste gas of medium and low concentration and medium and small air volume, and is the mature application method of the treatment of organic waste gas of "triphenyl" in China at present. The mixed organic waste gas with low air volume and low concentration is more suitable for this process.
5. Biological purification
Based on mature biological wastewater treatment technology, this method is characterized by low energy consumption and low operation cost. The drawback is that the pollutant needs to stay long enough during mass transfer and digestion, thus increasing the occupation of equipment. At the same time, the microorganism has certain impact load limit value, which increases the control or maintenance difficulty of the whole treatment system during startup and shutdown. The method has been applied in domestic waste gas treatment of sewage station, but little in industrial waste gas treatment.
6. Membrane separation method
The method is based on the difference between the ability of organic steam and air to penetrate the membrane. The method is applicable to the treatment of concentrated waste gas (> 1000mg/m3). At present, the cost of investment and operation is high, and it is still in the stage of experimental research.
7. Photocatalytic method
Photocatalytic purification is based on the REDOX ability of photocatalyst under ultraviolet irradiation. Using photocatalytic purification technology to remove organic pollutants in the air has the following characteristics:
(1) direct use of oxygen in the air as an oxidant, with mild reaction conditions (normal temperature and pressure)
(2) organic pollutants can be decomposed into small inorganic molecules such as carbon dioxide and water, and the purification effect is thorough.
Photocatalytic purification technology has the advantages of deep oxygen at room temperature, little secondary pollution, low operation cost and promising use of sunlight as reaction light source. Therefore, photocatalysis is particularly suitable for the purification of indoor volatile organic compounds, showing great application potential in the deep purification.

Shanghai yongaijian purifying equipment co., LTD. Specializes in providing new technology and equipment for combined VOCs waste gas treatment. We are committed to becoming an enterprise integrating r&d, design, equipment manufacturing, engineering contracting and operation management. The company has the general contracting qualification of environmental pollution control, special design of environmental engineering and a number of related patent certificates, and is a member of the environmental protection association.

发布于2017-11-27