The glass industry is an important industry in China and plays a crucial role in the country's economic development. During the "Tenth Five Year Plan" period, China's fixed assets investment grew rapidly, industrialization and urbanization accelerated, and the demand for construction glass, automotive glass, and glass products increased significantly. It has created great space for the development of the glass industry, and China's glass manufacturing capacity has jumped to the top in the world for more than ten years.
The wastewater from glass edge grinding mainly comes from the cutting, edge grinding, and edge cleaning processes during the processing of glass products. The main pollutants are glass powder (silicon powder) produced during the cutting and grinding process, which is milky white in color and has high turbidity. There are no organic substances, inorganic salts, or plasma substances added in the wastewater generating section, and no ionic pollutants are produced during the production process. The characteristics of the production process determine the balance of water quality and the small fluctuation of water quantity in the production wastewater. Under the condition of recycling, the suspended solids and chromaticity of wastewater are relatively high.
　　Process Introduction:
Production wastewater - regulating tank - primary sedimentation tank - glass edge grinding water treatment equipment - reuse water tank
The wastewater from glass edge grinding is intercepted by a grid to remove large debris, and then sent to the regulating tank by a sewage pump to be transported to the sewage treatment equipment. Different chemicals, flocculants, pH regulators, etc. are then added. The mixed wastewater directly enters the self-developed high-efficiency separation and purification equipment, where the entire process of coagulation, fine filtration, and sludge concentration collection is completed in the equipment tank.
The treated clean water enters the clean water tank for industrial reuse or discharge. The equipment sludge is discharged into the concentrated sludge tank through a timed liquid discharge method, and then processed into sludge cake through a pressure filtration mechanism. The moisture content of the dehydrated mud cake is less than 20%, and the dehydrated mud cake can be bagged and regularly transported for processing.
　　Characteristics of glass edge grinding water treatment equipment:
Stable operation of equipment: For glass deep processing enterprises, production equipment operates continuously for 24 hours. As a water treatment equipment that is compatible with production, this is particularly important. All equipment in this system is controlled by PLC to reduce human intervention factors. Minimize the equipment failure rate and ensure the continuous operation of production equipment.
Excellent effluent quality: tailored to the characteristics of water used in production processes such as glass edge grinding, drilling, and cleaning. The effluent turbidity of this system is less than 1 NTU, suspended solids are less than 30 mg/l, and chromaticity is less than 30 times. Fully meet the requirements for production water, with sensory capabilities comparable to tap water.
Low operating costs: The average cost per ton of water treatment is 0.40-0.55 yuan, far lower than the water intake cost of tap water.
Easy to operate: This device adopts an integrated control system to avoid remote operations and is easy to operate.