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Sinochem News from June 16 to 18, at the 2021 Waste Salt Treatment and Comprehensive Utilization of Salt Resources (Qiao Fa) Forum in Shijiazhuang, the participating experts agreed that the utilization of waste salt resources must be managed throughout the process , Take the route of reduction, resource utilization and harmlessness
.
Li Yingji, president of the China Association for the Promotion of Industrial Environmental Protection, said that at present, the amount and variety of salt-containing solid (hazardous) waste generated by many industries such as pesticides, printing and dyeing, coal chemical industry, and coking are large and difficult to handle.
The landfill sites are limited.
The problem has become a major obstacle restricting the green development of the industry
.
Qu Ruijing, chief expert of the Renewable Resources Industrialization Research Center of the China Enterprise Management Institute, pointed out that only by realizing the recycling of hazardous waste and reducing the use of primary ore can we truly achieve pollution reduction
.
For the disposal of waste salt, he suggested that the solid management department issue a resource utilization exemption policy, formulate disposal specifications and resource product standards in a timely manner; encourage leading companies to take the lead in forming cross-industry and cross-professional collaborative innovation alliances, and train professional management personnel
Cao Dayong, director of the Testing and Evaluation Center of Shandong Academy of Environmental Sciences, said that waste salt has a wide range of sources, various types, and a high content of toxic and hazardous substances.
Using waste salt as a resource is currently the most reasonable way to dispose of it
.
He emphasized that the health risk assessment in the comprehensive utilization of waste salt is particularly important
Zhang Wei, director of the Resource Research and Design Institute of China National Salt Engineering and Technology Research Institute Co.
, Ltd.
, suggested that by-product salt should be given priority to provide salt for the "two alkalis"
.
He introduced that domestic sodium chloride is mainly used for dozens of uses such as caustic soda, soda ash, daily chemicals, printing and dyeing, among which the amount of salt used in the "two alkalis" accounts for about 70% of the total sodium chloride consumption
At present, some domestic enterprises have been in the forefront of the industry in the development of waste salt centralized disposal and resource recycling technology.
For example, Suzhou Qiaofa Environmental Protection Technology Co.
, Ltd.
independently innovates the core technology of low-consumption and high-efficiency MVR evaporator device, which can realize waste Centralized salt disposal and resource reuse
.
At present, this technology has been widely used in industries such as coking and carbon black
