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Chemical microwave treatment method of industrial methyldiethanolamine wastewater

A technology of methyldiethanolamine and microwave chemistry, which is applied in chemical instruments and methods, natural water treatment, water/sewage multi-stage treatment, etc., can solve the problems of difficult degradation, ineffective treatment of wastewater, high COD of wastewater, and promote Degradation, accelerating the speed and efficiency of flocculation and sedimentation, and improving the removal rate

Inactive Publication Date: 2015-07-01
PUYANG DESHENG IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MDEA wastewater has extremely high COD, is not easy to degrade, has certain toxicity to microorganisms, and has stable properties, is easily soluble in water, and is not easy to be adsorbed, so conventional treatment methods have no obvious effect on MDEA wastewater treatment

Method used

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  • Chemical microwave treatment method of industrial methyldiethanolamine wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Take 2000ml of raw water, measure its pH=9, COD Cr =1080mg / L, the water quality is slightly muddy.

[0061] Add 2000ml of raw water into the water tank, add 2ml of oxidant sodium hypochlorite, turn on the mixer, stir evenly for 1 minute, and the pH is reduced to 7 after measurement.

[0062] Take 1ml of the prepared mass concentration of 5% diatomite and calcium oxide sensitizer suspension, wherein the mass concentration of diatomite and calcium oxide are both 2.5%, add it to the waste water, turn on the mixer, and stir evenly for 30 seconds , the pH rose to 11 by measurement.

[0063] Take 1 ml of the prepared polyferric sulfate coagulant solution, the concentration of which is 5%, add the mixed solution, turn on the mixer, stir evenly for 30 seconds, and the pH is reduced to 8 after measurement.

[0064] Turn on the small liquid lift pump, start the microwave equipment at the same time, and introduce the mixed liquid into the microwave processing equipment.

[0065...

Embodiment 2

[0069] Dilute the wastewater of MDEA to be treated to a COD of about 1000 mg / L.

[0070] Add sodium hypochlorite solution with a concentration of 10% into the aeration box at a volume ratio of 1:1000, and aerate the box at the same time to maintain a stable air-dissolving ratio and aeration time.

[0071] Introduce the waste water into the stirring box, add 5% diatomite and calcium oxide mixed sensitizer solution to the waste water, and its volume is 1 / 2000 of the volume of the waste water. The volume of the coagulant solution is 1 / 2000 of the volume of the waste water. Continue to stir and mix until it is uniform. Because the solution of the sensitizer itself is alkaline and the solution of the coagulant itself is acidic, in this way, the MDEA to be entered into the microwave reactor is The pH of the wastewater was controlled to neutral.

[0072] The mixed wastewater enters the microwave sensitization reactor with a microwave power of 1.6kW, and the wastewater stays here for...

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Abstract

The invention relates to a chemical microwave treatment method of industrial methyldiethanolamine wastewater. The method comprises the following steps: (1) providing the methyldiethanolamine wastewater to be treated; (2) aerating the methyldiethanolamine wastewater to be treated by adding an oxidizing agent so as to increase the amount of dissolved oxygen and evenly mix the oxidizing agent with the water body; (3) adding a sensitizing agent and a coagulant and evenly stirring and mixing; (4) performing a concerted reaction on the sensitizing agent and the coagulant under the action of microwaves so as to generate a coagulant with a better adsorption precipitation effect, thereby further enhancing the adsorption precipitation effect; (5) performing sludge and water separation; (6) leading a separated supernatant to be filtered; (7) generating ozone and hydroxyl radicals under the irradiation of a microwave electrodeless lamp so as to further degrade methyldiethanolamine until methyldiethanolamine is mineralized. According to the method, the effective reaction of methyldiethanolamine can be performed on the basis of the functions of microwave energy; the deep treatment on methyldiethanolamine is further performed via the electrodeless photochemical oxidation of the microwaves, so that the problem that the methyldiethanolamine wastewater is difficult to treat is solved.

Description

technical field [0001] The invention relates to environmental protection technology, in particular to a method for treating industrial wastewater containing methyldiethanolamine. Background technique [0002] N-methyldiethanolamine (also known as methylethylene glycolamine, abbreviated as MDEA) is a tertiary amine substance. The molecular formula is CH 3 N(CH 2 CH 2 Oh) 2 , the molecular weight is 119.16, the specific gravity is 1.0418, the boiling point is 247°C, the viscosity at 12°C is 101cP, the freezing point is -48°C, and can be completely dissolved in water. [0003] At present, methyldiethanolamine has been widely used as a desulfurization solvent in natural gas desulfurization, coal gasification desulfurization and refinery desulfurization. MDEA vs H 2 S has high selectivity and low energy consumption, and is used in Claus raw material gas concentration, Scott method tail gas treatment, low calorific value gas desulfurization and other processes. [0004] MDE...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F103/36
Inventor 陈一虎苗西魁余江张闯
Owner PUYANG DESHENG IND
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