废气处理的技术方向 Technical direction of waste gas treatment

废气处理的技术一直在不断的改进,那废气处理设备厂家的废气处理有哪些技术方向?

1、废气处理技术方向
       从国内外发展绿色染整技术成果与经验看,染整定型机烟气治理技术具有以下4个明显的发展趋势。

2、热能利用与油脂回收
       定型机工程中的热能利用和油脂回收,可以产生显着的经济收益,是企业转“被动”,为“主动”,进行定型机的动力所在。
       热能利用：定型机是重点耗能设备,其能量消耗通常占染整企业总能耗的40%以上,是染整企业节能减排的重要环节。定型机废气温度高、气量大,直接排放造成大量能源浪费。废气温度高也不利于后续净化。单元的高效运行,进行热能回收是废气治理必不可少的预处理单元。
       废气处理设备厂家采用热交换方式回收废气所含的部分热量,能产生良好的经济效益。用水/气换热器回收的热量,多是以热水形式贮存,可用于印染行业中的煮炼工艺;采用气/气换热器,利用废气中的热量将新鲜空气预热后用于热定型工艺,一台定型机每年可减少锅炉燃料消耗十万元以上。
       油脂回收：定型机排出的高温废气含有多种有机化合物,对人体健康和生态环境都十分有害;加工化纤织物时热定型过程排出的废气,高沸点、粘稠性的油脂类化合物含量很高。废气净化过程中,黑褐色的油脂(俗称“化纤油”)被分离出来,可作为性能良好的工业建筑膜模剂,每吨售价3500~4000元;按每台定型机一天回收废油脂50kg计,一年可产生经济效益数万元。

3、组合工艺与深度净化
       定型机废气成分复杂,常含有大量亚微米级的粘稠性颗粒,单一的常规工艺的处理效率不高,需采用包括高压静电除尘技术在内的组合工艺,对烟气进行深度处理,才能达到良好的净化效果。
       组合工艺：可使部分有机化合物从气态分子冷凝、集聚成为液态颗粒,有助于提高后续净化单元的效率。采用过滤吸附和湿式洗涤等净化方法,对油烟的净化效率可达60%~75%,而采用静电捕获和焚烧净化等几种方法可获得95%以上的净化效率。
       我国定型机烟气治理工作,已经历以机械除尘为主的“简单治理” 和以湿式洗涤为主的“达标治理” 两个阶段。各种治理方法在维护周期、投资运行成本、操作简便性和安全可靠性等方面,存在显着差异。实践证明,单一工艺设备难以达到有效治理废气的目标。例如,采用湿式洗涤法时,出口烟气不但有大量油烟,而且有更多的白色水汽,仍然影响4、职工的身体健康和周围居民的正常生活。
       深度净化：焚化燃烧对油烟虽然具有很高的去除效率,但考虑到运行成本和操作简便性和安全可靠性,在实际中很少被采用。
       在各种定型机含油烟气治理技术中,高压静电除尘法的净化处理效果最为显着,具有除尘效率高和设备结构紧凑等优点。正确维护、消除火灾事故隐患,及时清理、减缓高压电极污染,是确保高压静电除尘设备正常使用和稳定运行的关键。

     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。

Waste gas treatment technology has been constantly improved, then waste gas treatment equipment manufacturers have the technical direction of waste gas treatment?

1. Technical direction of waste gas treatment
According to the development of green dyeing and finishing technology both at home and abroad, there are four obvious developing trends for the smoke control technology of dyeing and finishing machines.

2. Heat energy utilization and oil recovery
The use of heat energy and oil recovery in the shaping machine engineering can produce significant economic benefits, which is the driving force for enterprises to turn "passive" to "active".
Thermal energy utilization: the setting machine is the key energy consumption equipment. Its energy consumption usually accounts for more than 40% of the total energy consumption of dyeing and finishing enterprises, which is an important link of energy saving and emission reduction in dyeing and finishing enterprises. The high temperature and large air capacity of the molding machine waste gas directly cause a lot of energy waste. High exhaust temperature is not conducive to the subsequent purification. Efficient operation of the unit and heat recovery is an indispensable pretreatment unit for waste gas treatment.
Waste gas treatment equipment manufacturers use heat exchange to recover part of the waste gas heat, can produce good economic benefits. The heat recovered by water/gas heat exchanger is mostly stored in hot water, which can be used in the printing and dyeing industry. A gas/gas heat exchanger is used to preheat fresh air in the heat setting process by using the heat in waste gas. A set of shaper can reduce the boiler fuel consumption by more than 100,000 yuan per year.
Oil recovery: high temperature waste gas discharged from the molding machine contains a variety of organic compounds, which are very harmful to human health and ecological environment. The waste gas produced in the heat setting process of processing chemical fiber fabric has high content of high boiling point and viscous oil compounds. In the process of waste gas purification, the black and brown grease (commonly known as "chemical fiber oil") is separated, which can be used as a film mold agent for industrial buildings with good performance, with a price of 3500~4000 yuan per ton. According to each set machine recycling waste oil 50kg per day, a year can produce economic benefits of tens of thousands of yuan.

3. Combination process and deep purification
The waste gas of the molding machine is complex, often contains a large number of sub-micron class of viscous particles, the treatment efficiency of a single conventional process is not high, the composite process including high-voltage electrostatic dust removal technology needs to be adopted to carry out deep treatment of the flue gas, in order to achieve a good purification effect.
Combined process: some organic compounds can be condensed and accumulated into liquid particles from gaseous molecules, which is helpful to improve the efficiency of the following purification units. The purification efficiency of oil fume can reach 60%~75% by using filtration adsorption and wet washing methods, while more than 95% can be obtained by using several methods such as electrostatic capture and incineration purification.
The flue gas treatment work of the setting machine in China has gone through two stages, namely "simple treatment" dominated by mechanical dust removal and "standard treatment" dominated by wet washing. Various governance methods have significant differences in maintenance cycle, investment and operation cost, ease of operation and safety and reliability. Practice has proved that single process equipment is difficult to achieve the goal of effective waste gas treatment. For example, when the wet washing method is adopted, the exported smoke not only contains a lot of lampblack, but also has more white moisture, which still affects the health of workers and the normal life of the surrounding residents.
Deep purification: although incineration combustion has high removal efficiency for lampblack, it is rarely used in practice, considering the cost of operation, ease of operation and safety reliability.
Among all kinds of oil-containing flue gas treatment technologies of the shaper, the high-voltage electrostatic dedusting has the most significant purification effect, which has the advantages of high dedusting efficiency and compact equipment structure. Proper maintenance, elimination of fire hazards, timely cleaning and mitigation of high-voltage electrode pollution are the key to ensure the normal use and stable operation of high-voltage electrostatic dust removal equipment.

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