Landfill leachate membrane concentrated solution reduction and resourceful treatment system and method

Abstract

The invention discloses a landfill leachate membrane concentrated solution reduction and resourceful treatment system and method. The treatment system comprises an immersion combustion evaporation device, an industrial salt preparation device, a miscellaneous salt resourceful treatment device and a waste residue treatment device. The industrial salt preparation device comprises a forced circulation evaporation crystallizer for preparing industrial salt KCl and NaCl by using a saturated membrane concentrated solution, a flash evaporation cooling crystallizer for preparing industrial salt NaNO3and Na2SO4 by using mother liquor discharged from the forced circulation evaporation crystallizer, and a sodium sulfate evaporator; the miscellaneous salt resourceful treatment device comprises a reaction kettle, concentrated sulfuric acid is added into the reaction kettle, miscellaneous salts generated after the industrial salts are prepared enter the reaction kettle to react to prepare NaHSO4 and HCl, and reacted waste salt enters the waste residue treatment device to be formed so as to be solidified and buried. According to the treatment system, separation of the industrial salts is achieved while the membrane concentrated solution is subjected to submerged combustion evaporation reduction treatment, circulation of the salt in the environment is reduced, the salt is recycled, and the economical efficiency and environmental friendliness of landfill leachate membrane concentrated solution treatment are further improved.

Description

technical field [0001] The invention relates to a landfill leachate membrane concentrate reduction and resource recovery treatment system and method, belonging to the technical field of organic high-salt waste liquid treatment. Background technique [0002] At present, the treatment methods for landfill leachate membrane concentrate mainly include: recharge method, advanced oxidation method, incineration method, etc.; although the recharge method has the advantages of low cost and simple operation, the salinity and The continuous accumulation of refractory substances makes the high-salt leachate re-enter the treatment system in the subsequent treatment process, resulting in an increase in osmotic pressure and a reduction in membrane life; the advanced oxidation method is flexible in technology selection, but the treatment cost is high, and the treatment effect is difficult to meet the discharge standard; The content of calcium and magnesium ions in the membrane concentrated ...

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Problems solved by technology

[0006] Purpose of the invention: In view of the unsatisfactory effect of traditional treatment methods for membrane concentrates in the prior art, and the reduction and insufficient resource utilization in the simultaneous immersion evaporation process, the present invention provides a reduction and resource utilization of landfill leachate membrane concentrates. treatment system, and provide a method for using the system to reduce the amount of membrane concentrate and recycle it

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