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Carbonization and crystallization method for treating high-salt high-organic waste water

A technology for crystallization treatment and organic wastewater, applied in chemical instruments and methods, special compound water treatment, water/sewage treatment, etc. The effect of difficulty, lower energy consumption, and reduced organic concentration

Active Publication Date: 2018-09-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is: the problem that the evaporation and crystallization effect is not good when the existing high-salt and high-organic wastewater is treated

Method used

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  • Carbonization and crystallization method for treating high-salt high-organic waste water

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Embodiment 1

[0031] A method for treating high-salt and high-organic wastewater by carbonization and crystallization:

[0032] (1) Configure 10mL carbonized crystallization agent: hydrochloric acid 15%, malonic acid 25%, ferric sulfate 3%, zinc nitrate 5% and deionized water 52% by volume percentage, get hydrochloric acid 1.5mL, malonic acid 2.5mL, 0.3mL of iron sulfate, 0.5mL of zinc nitrate and 5.2mL of deionized water are mixed together and stirred evenly to make a metal salt carbide crystallization agent;

[0033] (2) Measure 25mL of high-salt and high-organic wastewater, filter and remove impurities, and add it to a 100mL special high-pressure reactor. Next, take 5 mL of the carbonized crystallization agent configured in step (1) and add it to the reaction kettle, stir at a temperature of 30° C. at a speed of 80 r / min for 20 minutes, and close the reaction kettle after the wastewater and the carbonized crystallization agent are fully mixed;

[0034] (3) Heating the reactor to hydroth...

Embodiment 2

[0038] A method for treating high-salt and high-organic wastewater by carbonization and crystallization:

[0039] (1) Configure 10mL carbonization crystallization agent: by volume percentage, sulfuric acid 10%, hydrochloric acid 10%, succinic acid 15%, glutaric acid 15%, ferric sulfate 5%, potassium nitrate 10% and deionized water 35%, take respectively Sulfuric acid 1mL, hydrochloric acid 1mL, succinic acid 1.5mL, glutaric acid 1.5mL, ferric sulfate 0.5mL, potassium nitrate 1mL and deionized water 3.5mL, mix them together, stir evenly, make metal salt carbonization crystallization agent;

[0040] (2) Measure 25mL of high-salt and high-organic wastewater, filter and remove impurities, and add it to a 100mL special high-pressure reactor. Next, take 5 mL of the carbonized crystallization agent configured in step (1) and add it to the reaction kettle, stir at a temperature of 50° C. at a speed of 120 r / min for 40 minutes, and close the reaction kettle after the wastewater and the...

Embodiment 3

[0045] A method for treating high-salt and high-organic wastewater by carbonization and crystallization:

[0046] (1) Configure 50mL carbonization crystallization agent: 15% sulfuric acid, 20% hydrochloric acid, 25% succinic acid, 5% copper chloride, 5% potassium nitrate, 1% palladium nitrate and 29% deionized water by volume percentage, take respectively Mix 7.5mL of sulfuric acid, 10mL of hydrochloric acid, 12.5mL of succinic acid, 2.5mL of copper chloride, 2.5mL of potassium nitrate, 0.5mL of palladium nitrate and 14.5mL of deionized water, mix them together, and stir them evenly to make metal salt carbide crystals agent;

[0047] (2) Measure 50mL of high-salt and high-organic wastewater, filter and remove impurities, and add it to a 100mL special high-pressure reactor. Next, take 20 mL of the carbonized crystallization agent prepared in step (1) and add it to the reactor, stir at a temperature of 50° C. at a speed of 160 r / min for 60 minutes, and close the reactor after t...

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Abstract

The invention discloses a carbonization and crystallization method for treating high-salt high-organic waste water. The method is characterized in that a metal salt carbonization and crystallization agent containing organic acid and inorganic acid is prepared; the high-salt high-organic waste water is added into a reaction still, the metal carbonization and crystallization agent is added into thereaction still, the liquid is stirred and mixed, and after the liquid is uniformly mixed, the reaction still is closed; the reaction still is heated to a predetermined temperature, the constant temperature carbonation reaction is conducted, the liquid is stirred constantly, after the reaction is finished, the reaction still is cooled to the indoor temperature, and the mixture in the reaction stillis subjected to solid-liquid separation to obtain separating liquid; the separating liquid is subjected to evaporative crystallization treatment to obtain evaporated liquid, salt and high-concentration evaporated residual liquid. The method utilizes the hydrothermal carbonization technology with mild reaction conditions, short reaction time, strong adaptability and lower energy consumption to pretreat the waste water, organic concentration is reduced, therefore the evaporative crystallization effect of the high-salt high-organic waste water is improved, and subsequent biotreatment loading anddifficulty degree of up-to-standard discharge or cyclic utilization of condensed fluid are reduced.

Description

technical field [0001] The invention relates to a method for treating high-salt and high-organic wastewater by carbonization and crystallization, and performing hydrothermal carbonization to significantly improve the evaporation crystallization rate of salt and the biochemical performance of evaporation liquid, which belongs to the technical field of wastewater treatment. Background technique [0002] At present, biological methods are generally used in wastewater treatment in my country, but some production industries such as chemical industry, food, processing, printing and dyeing, oil exploration, pharmaceutical and pesticide production, etc., the wastewater produced in the production process has the characteristics of high salt and high organic content. The COD in the wastewater reaches 10000-100000 mg / L, the mass fraction of salt is greater than 1%, and some toxic and harmful substances are inevitably present. Ordinary biological cells are easily inactivated in such a wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/30
CPCC02F1/02C02F1/048C02F2101/30C02F2305/00
Inventor 李响王静薛罡钱雅洁刘振鸿陈红张文启王晓暖袁健孙敏李前
Owner DONGHUA UNIV
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