A kind of crystallization separation process of magnesium sulfate in CLT acid high-salt wastewater
A high-salt wastewater, crystallization separation technology, applied in the direction of magnesium sulfate, general water supply conservation, natural water treatment, etc., can solve the problems of complicated biochemical process, high treatment cost, and many procedures, and achieve continuous and stable operation and good energy-saving effect , the effect of high separation purity
Active Publication Date: 2022-07-05
想莱(常州)节能科技有限公司
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Problems solved by technology
However, this biochemical method is not only complicated in process, but also has many procedures, and the treatment cost is also high, and the treatment effect is poor.
Microorganisms will be affected by salt tolerance, chemical precipitation will add new elements into the wastewater, and will cause waste of sulfate resources, which does not meet the requirements of resource recovery and utilization
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[0015] The present invention will now be described in further detail with reference to the accompanying drawings.
[0016] like figure 1 As shown, a process for separating magnesium sulfate crystallization in CLT acid high-salt wastewater has the following steps:
[0017] S1. Perform nanofiltration adsorption separation on CLT acid high-salt wastewater, and use activated carbon nanofiltration membrane to separate and recycle CLT acid macromolecular organic matter and some intermediate products in high-salt wastewater;
[0018] S2. Due to other impurity ions such as iron ions and chloride ions remaining in the wastewater, the separated wastewater is subjected to chemical precipitation reaction to remove impurities, and the residual impurity ions in the wastewater are converted into other precipitation substances by chemical precipitation;
[0019] S3, carry out thermal evaporation and concentration of the waste water after the impurity removal treatment, and crystallize under ...
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Abstract
The invention relates to a process for separating magnesium sulfate crystallization from CLT acid high-salt wastewater, comprising the following steps: (1), performing nanofiltration adsorption separation on CLT acid high-salt wastewater; (2), performing chemical precipitation reaction on the separated wastewater (3), carry out thermal evaporation concentration crystallization to the treated waste water; (4), carry out recrystallization treatment to the crystal after thermal evaporation concentration crystallization; (5), because the solvent after concentration and crystallization is also doped with part solute, so it is recycled or re-introduced into the system after post-processing. The invention integrates adsorption separation, impurity removal treatment, evaporative concentration, crystallization and evaporative recovery process, can effectively deal with the problem of waste water produced by the toluene sulfonation method, and recycles magnesium sulfate in the waste water, and the produced magnesium sulfate is pure High, uniform crystal shape and particle size, solve the problem of evaporation failure in the evaporation process and the problems of low purity and low precipitation effect of crystalline products, and it is easy to achieve large-scale production.
Description
technical field [0001] The invention relates to a crystallization separation process of magnesium sulfate in CLT acid high-salt wastewater produced by a toluene sulfonation method. Background technique [0002] At present, there are many synthetic methods of CLT acid, but the toluene sulfonation method is widely used in the industrial preparation of CLT acid. This method uses toluene as a raw material, and needs to add materials such as sulfuric acid, magnesium oxide, sodium chloride and iron powder in the reaction process. The final synthesis of CLT acid. However, the production of a large amount of CLT acid has resulted in a large amount of serious high-salt organic wastewater, which contains a large amount of sulfate, impurity ions and intermediate products and other organic substances. If this wastewater is directly discharged or discharged without advanced treatment, it will cause considerable damage to the environment However, the sulfate in wastewater has the signifi...
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IPC IPC(8): C02F9/10C01F5/40C02F103/36
CPCC02F9/00C01F5/40C02F1/283C02F1/442C02F1/04C02F1/52C02F2103/36Y02A20/131
Inventor 张琳计益翔师承诚许伟刚卜诗余志康房加美胡一旸
Owner 想莱(常州)节能科技有限公司