Lightride to create a new direction of coking wastewater resource utilization

2022-05-09 0 By

China’s coking industry in the 1990s into a period of rapid development, the national coke production increased year by year.Coking industry in driving China’s economic and social development at the same time, but also caused serious pollution and damage to the environment, especially the discharge of coking wastewater, so that rivers, lakes and groundwater have been seriously polluted, to the human living environment has brought serious damage.With the increasingly serious industrial pollution and water shortage, coking wastewater discharge and national standards continue to improve.With the upgrading of environmental protection, the coking industry in recent years in the field of environmental protection investment continued to grow.Decades of coking wastewater has a “road of growth” “twelfth five-year” period, water consumption unit value added of industry need to reduce 30%, water resources has become the bottleneck of sustainable development of a lot of enterprise, therefore, developed economic and reasonable, efficient new coking wastewater treatment technology is still a major issue in the research field of the industrial wastewater.During the “13th Five-Year plan” period, the coking industry has made a lot of achievements in terms of production capacity, structural transformation and technological development.A shift from production growth to intensive efficiency, resource conservation and environmental friendliness;Over 50 million tons of excess production capacity were reduced in the coking industry.Great progress has been made in the development and application of materials such as the comprehensive utilization of coke oven gas to produce methanol and ammonia and natural gas.Coking production enterprises in key national environmental monitoring areas have basically achieved standard emissions;Full use of the dry distillate function of coke oven and the advantage of high energy conversion efficiency to develop gasification coke, and then synthesize natural gas, methanol and other clean raw fuels;Remarkable achievements have been made in the application and promotion of civil clean coke to replace the burning pollution of bulk coal.”Fourteen five” new period, according to the “coking industry” fourteen five “development planning outline” elaborated, the coking industry is facing new requirements.By 2025, coking wastewater production will be reduced by 30%, nitrogen oxide and sulfur dioxide production will be reduced by 20% respectively;We will optimize solid waste treatment processes and increase the resource utilization rate of solid waste by more than 10 percent.Environmental protection requirements are becoming stricter, and enterprises are required to discharge coking wastewater after treatment to the standard. For some places where water resources are lacking, coking wastewater is required to be treated to the reuse standard and used back in the enterprise to achieve nearly zero discharge of wastewater.However, there are a large number of macromolecules in coking wastewater which are difficult to degrade. The traditional activated sludge method can not effectively remove these substances, so there are still more organic compounds in the biochemical water.As a result, the effluent can not be discharged to the standard or used in the enterprise.Therefore, it is necessary to treat the refractory organic matter in depth.At present, the domestic coking wastewater is mainly treated by activated sludge method and coagulation precipitation method, which can reach the secondary discharge standard of “Comprehensive Sewage Discharge Standard” (GB8978-1996).With the implementation of the new Pollutant Discharge Standard for Coking Chemical Industry (GB16171-2012), the direct discharge standard for coking chemical wastewater will be further increased to COD80mg/L and ammonia nitrogen 10mg/L in 2015, and the original biochemical treatment method can no longer meet the requirements of the new standard.How to create a new direction of coking wastewater resource utilization?Membrane separation technology with conventional separation process, such as filtration, distillation, extraction, evaporation, recrystallization, decoloring, such as adsorption, compared with the features of easy operation, compact equipment, working environment safety, save energy consumption and chemical reagent, no phase change, no pollution etc, is one of the promising high and new technology with development, the industrial technology in the 21st century reform plays a decisive role.In the process of further advanced treatment of coking wastewater, membrane combination technologies such as ultrafiltration and reverse osmosis can realize the recycling of wastewater resources, which is in line with the circular economic development mode with low consumption, low discharge and high efficiency advocated by the state.Lightrider has been deeply engaged in the field of environmental protection for several decades, and the water treatment equipment fully “fits” the new requirements of the “14th Five-year plan” period of coking wastewater.The membrane separation technology is applied to the advanced treatment of coking wastewater, which can stratify the pollutants in the wastewater, so as to effectively enhance the effect of wastewater treatment.Lightride has developed a membrane advanced treatment and reuse system -Neterfo limit separation system for all kinds of high concentration wastewater treatment.Compared with the original reverse osmosis system, the working pressure of this system can reach 120bar by combining the large cross-flow PON anti-pollution technology and POM wide-channel viaduct technology.It is suitable for high-multiple treatment of high-salt wastewater and various high-concentration water-based materials, breaking through the bottleneck of 50% recovery rate, and the comprehensive recovery rate can reach more than 90%.According to the characteristics and treatment standards of coking wastewater, Lightride has a complete set of wastewater reuse ( and near zero discharge scheme, which has become the technical guarantee of coking wastewater treatment.The wastewater treated by the biochemical system enters the regulating tank, and then goes through the pretreatment device to enter the ultrafiltration equipment to ensure that the water quality meets the water inlet requirements of the subsequent system. The wastewater is treated by the limit separation system to reach the reuse standard, and then is treated by the evaporation crystallization system to achieve near-zero discharge.Wastout pretreatment system is adopted in the pretreatment device, which breaks the limitation of traditional filtration and precipitation process and integrates various functions such as coagulation and flocculation, dosing agitation and precipitation cycle to ensure effective removal of turbidity and SS, while reducing TOC, chroma, metal and hardness content according to water quality.Ultrafiltration equipment is one of the important equipment of water treatment filter, the set of equipment is mainly to filter the quality of water, filter element in the production process, filter element plays a major role in environmental protection.The water treatment efficiency of the filter element will gradually weaken after running for a period of time, thus affecting the water quality requirements, so the filter element will be replaced irregularly according to the water quality.Neterfo limit separation system is resistant to high hardness and high COD impact.Chemical cleaning recovery is good, compared with the traditional anti-pollution membrane components of nearly double life.The Neterfo limit Separation system is equipped with three series of custom modular designs to achieve a high degree of matching requirements.System built-in AI chip to achieve intelligent adjustment, always ensure efficient running state.Coking wastewater decades of “metamorphosis” road to usher in development opportunities, Lightride equipment innovation strength, quality assurance, become a new coking wastewater treatment and utilization of the “way”.