Resource utilization method of chemical mixed salts
A technology for resource utilization and chemical industry, applied in the field of resource utilization of chemical miscellaneous salts, can solve the problems of poor process environmental protection, products that are difficult to meet industrial application requirements, and high processing costs, and achieve improved utilization, continuous production process circulation, and enhanced floating. select effect effect
Active Publication Date: 2019-06-11
CHINA UNIV OF MINING & TECH
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Problems solved by technology
However, coal chemical miscellaneous salt is a compound industrial waste combining organic and inorganic. The existing hazardous waste treatment standard has high treatment costs, poor environmental protection of the process, and the product cannot meet the requirements of industrial applications. Therefore, after concentration and crystallization of salty wastewater It is urgent to find an economically feasible, low energy consumption, high environmental protection, safe and stable treatment path for the produced crystalline salt
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[0025] Implementation of the present invention will be further described below in conjunction with accompanying drawing:
[0026] Such as figure 1 and figure 2 Shown, the resource utilization method of chemical miscellaneous salt of the present invention is characterized in that concrete steps are as follows:
[0027] Transport the saline wastewater produced by coal chemical enterprises to the sewage treatment plant for multi-stage concentration and crystallization to form miscellaneous salts, and feed miscellaneous salts, collectors and foaming agents into mixing tank 1 through pipelines, miscellaneous salts, collectors The ratio with the foaming agent depends on the needs. The collector is diesel oil, the foaming agent is 2-octanol, the concentration of high-concentration saline wastewater is 3000mg / L, and the main components of miscellaneous salts include: Na 2 SO 4 +NaCl+K 2 SO 4 Proportion 0~100%; Na 3 NO 3 +CaCl 2 +Na 2 CO 3 +Silicate accounts for 0~100%; CaSO...
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The invention relates to a resource utilization method of chemical mixed salts, is suitable for treatment of hazardous waste mixed salts in coal chemical industry, and belongs to the field of coal resource utilization. The method comprises the following steps: salt-containing wastewater is transported and concentrated to form the mixed salts, the mixed salts, a collecting agent and a foaming agentare sent into a stirring barrel, after the materials are fully and uniformly mixed in the stirring barrel, the mixture is sent into an ore pulp pretreater, pulverized coal is sent into the ore pulp pretreater, water is added, and mixing is performed to form ore pulp; completely-mineralized ore pulp is sent into a rough flotation machine: when a foam layer is stabilized, a scraping plate valve ofthe rough flotation machine is opened for sorting operation, and sorted rough concentrate and rough tailings are discharged; the discharged rough concentrate and the rough tailings are separately sentinto sedimentation filtration centrifugal dehydration machines for dehydration, a centrifugate produced after the dehydration is repeatedly used, after flotation is performed, an overflow enters a filter press I, and filter residues from the filter press I are discharged as final selected concentrate products; and filter residues from a filter press II are discharged as final scavenging concentrate. The method provided by the invention has simple steps, a good use effect and wide practicality.
Description
Technical field [0001] The invention relates to a resource utilization method of chemical miscellaneous salt, especially suitable for the treatment of coal chemical hazardous waste miscellaneous salt and the resource utilization method of chemical miscellaneous salt used in the field of coal resources utilization. Background technique [0002] Modern coal chemical enterprises refer to coal processing and transformation industries that use coal as the main energy source to produce various clean energy and basic industrial raw materials, including coal-to-oil, coal-to-gas, coal-to-methanol, coal-to-olefin (aromatic) Pyrolysis and quality utilization and other enterprises. In recent years, with the rapid development of China's coal chemical industry, various enterprises will produce a large amount of industrial high-concentration saline wastewater every year. The direct or indirect (including diluted) discharge of high-concentration saline wastewater will not only cause great ...
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IPC IPC(8): B03D1/001B09B3/00B03D103/08
Inventor 蒋立翔桂夏辉武建军邢耀文张锐夏阳超郭芳余丁世豪
Owner CHINA UNIV OF MINING & TECH