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    Waste gas treatment equipment for cyclone plate columnDirection of waste gas treatment technology:

    来源:admin(传梦环保整理发布)   时间:2018-08-10

    Direction of waste gas treatment technology: From the development of green dyeing and finishing technology at home and abroad, the flue gas treatment technology of dyeing and finishing machine has the following four obvious development trends. Thermal energy utilization and oil recovery in the project of stereotyping machine can produce significant economic benefits. It is the power source for enterprises to turn passive and take the initiative to stereotyping machine. Heat energy utilization. Forming machine is a key energy-consuming equipment, its energy consumption usually accounts for more than 40% of the total energy consumption of dyeing and finishing enterprises, is an important part of energy saving and emission reduction in dyeing and finishing enterprises. The exhaust gas temperature of the setting machine is high and the gas quantity is large, and the direct emission causes a lot of energy waste. The high temperature of waste gas is not conducive to the follow-up purification. The efficient operation of the unit, heat recovery is an essential pre-treatment unit for waste gas treatment. The heat exchange method is used to recover part of the heat contained in the exhaust gas, which can produce good economic benefits. Most of the heat recovered by water/gas heat exchangers is stored in hot water, which can be used in the cooking process of printing and dyeing industry. By using gas/gas heat exchanger, fresh air is preheated and then used in the heat setting process with the heat of exhaust gas. A finalizer can reduce the fuel consumption of boiler by more than 100,000 yuan per year. Oil recovery. The high-temperature exhaust gas discharged by the setting machine contains many kinds of organic compounds, which are harmful to human health and ecological environment. The high boiling point and viscous grease compounds are high in the exhaust gas discharged from the heat setting process during the processing of chemical fiber fabrics. In the process of waste gas purification, the black-brown grease, commonly known as chemical fiber oil, is separated and can be used as a good performance industrial building membrane moulding agent. The price is 3500-4000 yuan per ton. According to the recycling of waste grease 50 kg per day by each stereotyping machine, tens of thousands of yuan of economic benefits can be produced in a year. Composition of exhaust gas from combined process and deep purifying and finalizing machine is complex, and it often contains a large number of submicron viscous particles. The treatment efficiency of single conventional process is not high. It is necessary to adopt combined process including high-voltage electrostatic precipitation technology for advanced treatment of flue gas in order to achieve good purification effect. Combined process. Some organic compounds can be condensed and agglomerated from gaseous molecules into liquid particles, which is helpful to improve the efficiency of the subsequent purification unit. The purification efficiency of lampblack can reach 60% ~ 75% by filtration adsorption and wet washing, and more than 95% can be obtained by electrostatic capture and incineration purification.

    In China, the flue gas control of stereotyping machine has gone through two stages: the simple control mainly based on mechanical dust removal and the standard control mainly based on wet washing. There are significant differences in maintenance cycle, investment and operation cost, operation simplicity and safety and reliability among various governance methods. It is proved by practice that it is difficult for single process equipment to achieve the target of effective treatment of exhaust gas. For example, when wet washing method is used, the outlet flue gas not only has a lot of lampblack, but also has more white water vapor, which still affects the health of workers and the normal life of the surrounding residents. Deep purification. Although incineration combustion has a high removal efficiency for soot, it is seldom used in practice because of its operation cost, simplicity and reliability. Among all kinds of oil-containing flue gas treatment technologies, high-voltage electrostatic precipitation has the most remarkable purification effect, with the advantages of high dust removal efficiency and compact equipment structure. Correct maintenance and elimination of hidden dangers of fire accidents, timely cleaning and slowing down the pollution of high-voltage electrodes are the key to ensure the normal use and stable operation of high-voltage electrostatic precipitators. The environmental pollution caused by the exhaust gas of the stereotype machine has attracted great attention. In recent years, some cities along the southeast coast of China have achieved some results in the special control of printing and dyeing machine flue gas. Taking Shaoxing County of Zhejiang Province as an example, the dyeing and finishing revolution in Shaoxing County has been carried out since 2006, and a major turning point from water control to gas control has been achieved. The action requires dyeing and finishing enterprises to install waste gas purification devices, and must comply with environmental protection, quality supervision, safety supervision and other departments of the specifications and inspection standards, waste gas collection rate reached more than 90%, total particulate matter removal rate reached 80%, oil fume removal rate reached 75%, and the purified waste water and waste oil to prevent and control secondary pollution. Measures. Up to now, the county's stereotypes are basically equipped with waste gas purification devices, the regional atmospheric environment quality has been significantly improved. Some achievements have been made in the special treatment of the waste gas from the stereotyping machine because of the high price and inconvenience in maintenance of the matching heat recovery and flue gas treatment equipment abroad; most enterprises adopt the treatment methods developed by themselves in China, including mechanical purification, wet cleaning, electrostatic capture and incineration purification. Technology, water/gas heat recovery-electrostatic precipitation and gas/gas heat recovery-spray washing process. Compared with the technical requirements of effective recovery of heat energy, discharge of flue gas up to the standard, stable and reliable operation, the existing waste gas treatment projects of stereotyping machines have problems of low flue gas purification efficiency, huge heat recovery potential, and fire accidents. In addition, due to the lack of relevant emission standards and corresponding detection methods, it is difficult to effectively implement the environmental monitoring of flue gas emissions from stereotypes.

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    Zouping Shuaike Painting Purification Equipment Co., Ltd. is a subsidiary of Guangzhou Jiuhua Machinery Equipment Co., Ltd. It specializes in the design and manufacture of environmental protection painting equipment. Its main products are UV photocatalysis, spray tower, swirl tower, activated carbon environmental protection box, water curtain cabinet, central dust removal, paint baking room ass...

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