Resource utilization method of industrial mixed salt containing organic solvent
An organic solvent and resource utilization technology, which is applied in the field of resource utilization of industrial mixed salt, can solve the problems of high energy consumption, long residence time, and high equipment investment cost, and achieve the effect of low energy consumption and reduced difficulty
Active Publication Date: 2021-07-30
江苏迈克化工机械有限公司
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Problems solved by technology
[0005] 1. A large amount of waste salt is produced, and the disposal technology is difficult and costly;
[0006] 2. There is a lack of waste salt resource disposal technology that can be applied in engineering;
[0007] 3. Waste salt recycling lacks labeling support and policy guidance
[0014] Disadvantages: large investment in equipment, high security risks
[0017] Disadvantages: Adding chemicals will bring in new impurities and increase the difficulty of subsequent processing
[0020] Disadvantages: The configuration of washing liquid is cumbersome, and the washing effect is difficult to control
[0023] Disadvantages: high equipment investment cost and high energy consumption
Method used
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Embodiment Construction
[0045] The present invention will be further described now in conjunction with accompanying drawing.
[0046] This embodiment is described by taking the extraction of sodium chloride as an example.
[0047] Such as figure 1 Shown, the resource utilization method that contains the industrial mixed salt of organic solvent, comprises the following steps:
[0048] For one wash, the waste salt is dissolved into the first washer for washing, and the first washer is equipped with a washing solvent, and the washing solvent is used to dissolve the organic solvent in the waste salt;
[0049] Once filtered, the waste salt after washing is subjected to solid-liquid separation once, and the waste salt is separated from the washing solvent;
[0050] For secondary washing, the waste salt after primary filtration enters the second scrubber for washing, and the second scrubber is filled with saturated sodium chloride brine, which is used to dissolve other salts other than sodium chloride;
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The invention relates to a method for treating waste salt, in particular to a method for recycling industrial mixed salt containing organic solvent, comprising the following steps: washing once, dissolving waste salt in a first washer for washing, and the first washer is equipped with There is a washing solvent; the waste salt after the first washing is subjected to a solid-liquid separation; the second washing, the waste salt after the first filtration enters the second washer for washing, and the second washer is filled with saturated brine, and the saturated brine is used to dissolve the Other salts other than the salts to be obtained; secondary solid-liquid separation after secondary washing; three washings, the waste salt enters the third washer for washing, and the third washer is filled with undersaturated brine, and the undersaturated brine is used for Dissolving the salts in the waste salt; three times of solid-liquid separation after three washings, the waste salt is separated from the brine, the brine is formed and the saturated brine is formed. The method has short technological process time, small equipment investment, easy subsequent treatment, high recovery rate, high salt purity and low energy consumption.
Description
technical field [0001] The invention relates to a treatment method of waste salt, in particular to a resource utilization method of industrial mixed salt containing organic solvents. Background technique [0002] Industrial waste salt refers to by-product crystalline salts produced in the process of re-industrial production. According to the composition, it can be divided into: single waste salt, mixed salt and miscellaneous salt (containing impurities). The main sources of industrial waste salt in my country are: soda ash industry, chlor-alkali industry, pesticide industry, coal chemical industry, printing and dyeing industry, oil and gas exploration industry and solid waste treatment industry. The annual industrial waste salt production is more than 20 million tons. [0003] The hazards of improper treatment of industrial waste salt: it will directly lead to the pollution of surface water and groundwater, pollute the soil, destroy the ecological environment, lead to land...
Claims
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IPC IPC(8): C01D3/14C01D3/04
Inventor 曾锡华曾煜辉
Owner 江苏迈克化工机械有限公司