2016 in Shandong Province recently held in Qingdao City, the Chinese ecological textile environmental protection science and technology conference, China Textile Engineering Institute deputy director of environmental Specialized Committee Wang Baosheng told reporters, "emission standard of air pollutants for textile printing and dyeing industry" (hereinafter referred to as the "standard") is expected to be released this year.
Textile printing and dyeing waste gas emissions more subtle, difficult to regulate. Due to the lack of specific, targeted standards, textile waste gas treatment and monitoring technology is still in the blank stage." Wang Baosheng said that the country is organizing experts to prepare the standard, he himself was also involved in the formulation of work, has been investigated in Guangdong, Fujian, Zhejiang, Jiangsu, Shandong and other places hundreds of enterprises.
In order to meet the requirements of the national standards, the enterprise must improve the management level and improve the management level, and effectively control the pollution of the textile industry to the atmospheric environment." Wang Baosheng believes that this will be bound to improve the cost of environmental protection of textile printing and dyeing enterprises, industry enterprises will enter a new round of reshuffle.
High temperature molding machine consumption potential
It is understood that the industrial source of VOCs emissions involved in many industries, the current lack of authoritative recognition of the emission inventory, which is one of the key industries in the printing industry.
Printing and dyeing industry energy consumption, heavy pollution. The gaseous pollutants in printing and dyeing industry are often discharged in the form of high temperature gas mixture." Wang Baosheng told reporters that the high-temperature stereotypes of the exhaust gas emissions have a high temperature (120 DEG C ~ 170 C), high pollution (composition complex) characteristics, and in the textile printing and dyeing industry emissions of relatively large. Statistics show that as a high energy consumption process, the drying process of the domestic energy utilization rate is about 40% ~ 50% (setting function of consumption is about 35%), while the foreign advanced level of 70%, therefore, setting machine energy saving also has great potential.
According to reports, in 2008, the national development and Reform Commission issued the "printing and dyeing industry access conditions" in specific provision, setting (tenter drying device) with temperature and humidity parameters on-line measurement and control device, a waste gas purification and waste heat recovery device, the outer layer has good insulation properties.
"The types and composition of VOCs pollutants emitted by the printing and dyeing industry are complex, and no one seems to be able to study them in detail, but it is certain that they contain acidic gases, ordinary organic matter and malodorous gases." Wang Baosheng said, stereotypes machine exhaust treatment is the key to the printing and dyeing industry industrial gas pollution control, which has become a consensus. In the "standard" formulation, the increase in the VOCs index.
Wang Baosheng also revealed that the wastewater generated in the process of printing and dyeing wastewater treatment plant, especially in front of the sewage treatment process, there are a lot of odor emissions, will affect the surrounding environment, to harm the surrounding residents. Therefore, in the "standard" has also increased the development of the relevant indicators.
Waste gas treatment technology research and development needs to be strengthened
Insiders predict that the future of the national level will be the introduction of air pollution prevention and control plan is more strict, the current policy is "opening", a series of environmental policy "countries combined, will undoubtedly promote the further development of printing and dyeing industry, energy-saving emission reduction and clean production.
However, at present, there is one thing that people do not, companies are reluctant to do independent, suggested that the government or industry, special research on public project of printing and dyeing industrial waste gas composition and content, it is useful to use the most appropriate technology of printing and dyeing waste gas treatment." Wang Baosheng believes that in the face of the upcoming release of the standard, it is necessary to strengthen the research and development of waste gas treatment technology related reserves and evaluation and promotion.
At present, some provinces have introduced the local standards for the discharge of atmospheric pollutants. More stringent local standards, Zhejiang Province, the textile dyeing and finishing industry air pollutant emission standards. In addition to the requirements of the production facilities should take reasonable measures, not to dilute the emissions, but also on the organization of emission control and air pollution control equipment, and so put forward specific requirements.
It is understood that the organization China Textile Engineering Institute of relevant experts, after research and experiment for many years, has designed and manufactured a setting machine exhaust heat recovery and disposal system of a kind of intelligent, and successfully applied to Guangdong Hutai printing and dyeing and other large enterprises.
"Normally, setting machine exhaust gas is discharged directly, the exhaust gas which contains heat have been emitted into the atmosphere, but through the system of the heat exchange device, the high temperature exhaust heat conversion for hot water recycling, can produce considerable economic value." Wang Baosheng said, from the enterprise actual operation situation, an average of about 400000 yuan, Recyclable about 44 thousand yuan a month, after deducting operating costs 7442 yuan / month, not counting in waste oil recovery situation, more than a year to recover the cost of equipment.