A few days ago, the Ministry of Ecology and Environment, together with relevant departments and relevant provincial (municipal) governments, jointly issued the “Action Plan for Comprehensive Air Pollution Control in the Autumn and Winter of 2019~2020 in the Yangtze River Delta Region” (hereinafter referred to as the “Plan”), clarifying the plans for the Yangtze River Delta region today and tomorrow The air quality improvement goals in the autumn and winter of the two years are: the average concentration of PM2.5 will decrease by 2% year-on-year, and the number of days with severe and above pollution will decrease by 2% year-on-year.
The “Plan” proposes that all localities should focus on enterprise clusters such as textile printing and dyeing to further determine the positioning of industrial development , scale and layout, in accordance with the overall requirements of “building a batch of benchmarks, transforming and upgrading a batch, optimizing and integrating a batch, and eliminating a batch”, formulate a comprehensive rectification plan, propose specific governance tasks, unify standards and timetables, and enhance industrial development Quality and environmental governance levels.
There is no doubt that this has pressed the “fast forward button” on the waste gas treatment of textile printing and dyeing enterprises. What should enterprises do? What to do?
Shenghong Group Co., Ltd.: Clean energy is precise and controllable
“China’s printing and dyeing enterprises are diverse Guangzhou, production technology capabilities have developed rapidly in recent years. While creating huge economic benefits, it has also brought about environmental pollution problems.” Zhu Donglan, director of the printing and dyeing office of Shenghong Group Co., Ltd. pointed out that the setting machine is the largest energy consumer in printing and dyeing enterprises. One of the high-temperature equipment, the traditional setting machine uses coal to cause the thermal oil boiler to generate heat. However, coal will produce a large amount of carbon dioxide and nitrogen oxides during the combustion process. Its displacement is large and its concentration is high. In addition, it affects the ozone layer. Destruction and serious atmospheric pollution.
“With the continuous occurrence of smog and haze weather, finding clean energy to replace coal burning has become an important task for the global energy industry.” Zhu Donglan said that through research, the main energy sources to replace coal burning It is natural gas and biomass, but the specific calorific value and utilization rate of natural gas are much higher than that of biomass. It is non-toxic and has high combustion thermal efficiency. It is transported through pipelines and does not require storage equipment and facilities. Therefore, using natural gas to replace coal is the best choice.
“We removed the thermal oil pipe inside the shaping machine and installed a combustion chamber so that the hot air can fully circulate and convection to ensure indoor temperature balance and a controllable temperature rise rate. The company installed a burner and burner control system, so that operations can be completed on a unified platform. Compared with the coal-fired boiler heating before the transformation, this technology does not require the use of thermal oil as a heat medium for secondary heating conversion. The heat generated directly heats the circulating air, which is used by the circulating air. The temperature controls the flame size of the burner with a control accuracy of ±1°C, allowing optimal energy utilization. At the same time, since it is directly transported to the shaping machine through pipelines, it can be used on demand and the load is stable, avoiding unnecessary Waste and reduced energy usage.” Zhu Donglan introduced in detail.
She said that with the development trend of national environmental protection policies and energy policies, as well as the gradual improvement of natural gas energy supply conditions, the promotion of natural gas heating shaped direct combustion technology is an inevitable trend , Shenghong Group will assume more social responsibilities, take the initiative to achieve innovative breakthroughs on the basis of technology, provide reference for atmospheric management in the printing and dyeing industry, and will vigorously promote energy-saving and emission reduction technologies.
Yuyue Home Textile Co., Ltd.: centralized processing to reduce costs
“As a large home textile enterprise, the company actively In response to the national environmental protection policy, the waste gas generated during the production process has been comprehensively and effectively controlled in advance.” Zhang Guoqing, vice chairman of Yuyue Home Textile Co., Ltd., pointed out that due to the large number of printing and dyeing production equipment and large distribution areas, it is usually difficult to achieve the goal with just one system. Waste gas treatment requirements.
“To this end, the company’s engineering technology department organized technical personnel to conduct on-site inspections, discussions, and demonstrations many times, and comprehensively discussed and optimized various treatment plans. Finally, it was determined that the sub-regions would be divided into multiple areas. The exhaust gas generation equipment is grouped and connected in parallel, and the exhaust gas is collected and processed through cooling, filtration, and low-temperature plasma technology. While achieving environmentally friendly ultra-low emissions, it also reduces the operating costs of environmental protection facilities and reduces heating energy costs.
Zhang Guoqing introduced that the system first collects the exhaust gas discharged by the equipment through pipelines to the cooling section of the front section of the purification equipment. This cooling section has its own automatic filtration system to remove lint, particulate matter, Dust and other impurities are filtered through the grid to filter the residual gas in the exhaust gas. After being cooled by a high-efficiency cooling fin tube condenser, it can be reduced to below 50°C, and then enters the low-temperature plasma electric field. The exhaust gas purified by the ion electric field can reach ultra-low emissions. Standard.
According to reports, the heat recovery device adopts the most advanced coil-type structure, which uses a 35% alcohol solution to conduct counter-current exchange with the exhaust gas, and the ethylene glycol solution takes away the exhaust gas. Most of the heat is absorbed, so as to achieve the exhaust gas cooling effect. The cooled exhaust gas can be reduced to below 50°C, while the exchanged ethylene glycol liquid is above 65°C. The boost circulation pump releases the carried amount through the high-efficiency heat exchanger. We provide winter heating sources in workshops and offices.
“By calculating the amount of waste heat recovered in the VOCs treatment process, the company saved a total of 8,800 tons of steam for winter heating per year, reducing heating costs. The cost is 1.76 million yuan. In the process of sustainable development, the company adopts scientific and reasonable energy-saving and environmental protection measures, which not only saves energy while protecting the environment, but also achieves significant economic benefits and effectively enhances the company’s social influence and market competitiveness.. “Zhang Guoqing said.
Jiaxing Jiumin Biotechnology Co., Ltd.: Plant deodorization effect is obvious
As we all know, the sewage treatment tanks in the textile printing and dyeing industry have high organic pollutant content, large changes in water quality, and complex composition. During the treatment process, a certain amount of hydrogen sulfide, methyl mercaptan, methyl sulfide, ammonia and other odors will be produced Gas. This odor gas belongs to industrial odorous gas.
“The control of odorous gas is an important step in winning the battle to defend the blue sky. It is a green, environmentally friendly and non-secondary pollution-free purification Technology is the direction of development. “The relevant person in charge of Jiaxing Jiumin Biotechnology Co., Ltd. said that the development and application of plant-based deodorants has become a hot spot in the research of ecological deodorants in recent years.
“Multi-enzyme composite air purifier is a product that has received national invention patents after pilot tests were completed in the laboratory and industrial transformation was completed by the enterprise to form a production scale. The preparation adopts multi-enzyme compound deodorization technology, which uses plants as raw materials, is extracted and synthesized through formula, because it has the characteristics of high processing efficiency, simple equipment required, easy operation, low cost, no secondary pollution and convenient management and maintenance. , has become a hot research topic in many countries and is a development direction of odor control. Practice has proved that the method of degrading odor by multi-enzyme composite products has unparalleled advantages over physical and chemical methods. ”
According to reports, the principle of multi-enzyme compound air purification technology to purify malodorous gases is to atomize the multi-enzyme compound air purification liquid through the high-pressure atomization device through the control system. The atomized multi-enzyme composite molecule droplets have a large specific surface area and surface energy, with an average of about tens of kilocalories per mole. The surface of the solution can not only effectively absorb odor molecules in the air, but also make them The three-dimensional configuration of the adsorbed odor molecules changes, weakening the chemical bonds in the odor molecules, making the odor molecules more unstable and prone to chemical reactions with other molecules.
For example, the person in charge said that the company’s printing and dyeing sewage treatment tank covers an area of 27 acres, with a daily processing capacity of 60,000 tons. It is responsible for the centralized treatment of sewage discharged by 14 textile printing and dyeing companies in the industrial park. There is an obvious odor 20 meters away from the factory boundary. The test results Approaching to exceed the standard, the company applied multi-enzyme compound deodorization technology to solve the problem of waste odor. After one week of operation, the effect was obvious, the test results were basically zero, and there was no odor at the factory boundary.</p
