What should I do with glass wastewater?
[China Glass Network] In recent days, environmental protection has become a big problem. Industrial enterprises in various fields have been affected. Because air pollution is relatively directly observable, everyone is only concerned about air pollution, but in fact, water pollution. It is also prominent in China. As a member of “heavy pollutionâ€, glass wastewater treatment is also a technical issue worthy of attention. So what are the treatment processes for these wastewaters? 1. Glass deep processing pure water preparation process Glass deep processing washing water requires pure water with a conductivity of less than 8 μs/cm. The raw water of the system adopts municipal tap water, and is pretreated by double filtration process (multi-media filtration + activated carbon filtration), and then enters the reverse osmosis device. The effluent can be directly used for washing, or the ion exchange resin treatment process can be increased by the latter stage to meet higher requirements. Water requirements. 2, coated glass processing ultra-pure water preparation process The water used for the coating line requires water quality as a poor conductor, that is, pure water with a resistivity greater than 16 MΩ•cm. Pure water is usually produced by a UF (ultrafiltration) device, a secondary RO (reverse osmosis) device, an EDI (electrodeionization) device, a polishing mixed bed, and the like, and the nitrogen water is sealed at the end to shield the pure water from the outside air. 3, curved washing machine wastewater online treatment and reuse process The reverse rinsing water of the curved washing machine is usually pure water, and the water production cost is high. The online recycling process can realize the recycling of water resources and reduce the production cost. Through the on-site modification of the curved washing machine, the recycling process is mainly a physical filtration process, while considering the on-line operating conditions, automatic control is adopted to achieve constant pressure water supply, and a temperature compensation device is provided. 4. Glass processing integrated wastewater treatment and reuse process The glass processing integrated wastewater mainly comes from the edging and washing section, and the main pollutants are glass powder and cleaning agent. The return water glass sewage treatment integrated machine can realize the first-level reuse through the processes of sedimentation, air flotation, filtration, etc., instead of using tap water for the edging and washing section, the reuse rate is greater than 95%, and the operating cost is less than 0.5 yuan/ton. water. 5, glass edging coolant treatment and reuse process In the glass processing production process, the heat generated by the edging process causes the ambient temperature to rise, and the phenomenon of glass burn, the life of the grinding wheel is reduced, and the edging time is too long. The addition of the grinding wheel coolant can prevent and alleviate the above situation and improve the edging. Efficiency, but the one-time use is more expensive. After concentrated treatment of the edging coolant wastewater, after treatment by vertical flow sedimentation and static pressure filtration device, the recycling system can recover 98% of the coolant, increasing the edging efficiency by 30%, and reducing the use cost. 6. Coating frozen cooling water system process The coated glass production line generates a large amount of heat during the production process and needs to be cooled in time to ensure the normal operation of the equipment. The cooling water process is divided into a freezing system and a cooling system. The chilled cooling water system has three independent cycles, namely cooling cathode, cooling floor baffle, cooling cathode power supply and power cabinet. The inner circulating cooling water (pure water) is exchanged by a water pump and a radiator, and the cooled cooling water is supplied to the coating line, and the outer circulating cooling water (tap water) is cooled by a cooling tower disposed outside the workshop. In the process design, constant pressure variable frequency energy-saving control technology is adopted for all pumps to make the system run stably and reliably. In fact, the process technology for treating sewage and wastewater has existed for a long time. However, most enterprises have not kept up with the environmental awareness. They prefer not to spend a lot of money on the purchase of environmental protection equipment, but once the state pays attention to environmental protection, it suffers earlier. Often these are also businesses. TAIZHOU GAOXIN NONWOVENS CO.,LTD , https://www.cntz-nonwovens.com