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Treatment method of diethanol amine wastewater

A technology of diethanolamine and treatment method, which is applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of cumbersome and uneconomical processes, and achieve simple and economical operation. cost effect

Inactive Publication Date: 2020-11-10
GUANGDONG UNIV OF PETROCHEMICAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this invention, iron carbon is used to micro-electrolyze methyldiethanolamine, and other methods are used to oxidize and degrade organic matter. It is not economical to adjust to acidity in the early stage and alkaline in the later stage

Method used

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  • Treatment method of diethanol amine wastewater
  • Treatment method of diethanol amine wastewater
  • Treatment method of diethanol amine wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The treatment method of diethanolamine waste water comprises the following steps successively:

[0031] a. Pretreatment: Add 200ppm ferric chloride flocculant to the diethanolamine wastewater, seal it, settling and separating after 500r / min stirring reaction, the supernatant is the pretreatment effluent, and the pretreatment effluent is clear light green, and the predicted The pH of the treatment solution is 8.9, the ammonia nitrogen content is 324mg / L, the total nitrogen content is 583mg / L, the COD is 9022mg / L, and the TOC is 3048mg / L;

[0032] b. Add sodium chloride to adjust the chloride ion concentration of the pretreatment effluent to 10g / L;

[0033] c. Electrolysis: get one liter of the solution processed by step b and add it to the electrolytic cell, use the titanium plated ruthenium iridium plate as the anode and the titanium plate as the negative electrode, and carry out electrolysis to the solution in the electrolytic cell through direct current to the anode a...

Embodiment 2

[0035] The difference between embodiment 2 and embodiment 1 is:

[0036] The electrolysis time is 8 hours in the step c.

Embodiment 3

[0038] The difference between embodiment 3 and embodiment 1 is:

[0039] The electrolysis time is 6 hours in the step c.

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Abstract

The invention discloses a treatment method of diethanolamine wastewater, which sequentially comprises the following steps: a, pretreatment: adding a flocculant into the diethanolamine wastewater, stirring the mixture to react, carrying out settling separation, and carrying out supernatant to obtain a pretreatment effluent; b, adjusting the chloride ion concentration of the pretreated effluent to 10 g / L20 g / L; and c, electrolysis: adding 1L of the solution treated in the step b into an electrolytic tank, and applying direct current to the anode and the cathode to conduct electrolysis on the solution in the electrolytic tank, wherein a titanium-based coating electrode serves as an anode, a metal electrode serves as a cathode, the current is 2.5 A, the voltage is 6 V, the polar plate distanceis 3 cm, and the polar plate size is 10*10 cm2. According to the method, the pH of the wastewater does not need to be adjusted, the operation is simple, and the COD and ammonia nitrogen content of the diethanol amine wastewater are reduced.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, more specifically, it relates to a treatment method of diethanolamine waste water. Background technique [0002] Natural gas and refinery gas need to be desulfurized. Alcohol amine desulfurization is a widely used method. The absorption-regeneration reaction process using alcohol amine as absorbent has the advantages of mature technology, high desulfurization efficiency, and recyclable operation. The alcohol amine method generally uses alkanolamines, such as ethanolamine, diethanolamine, diisopropanolamine, methyldiisopropanolamine, and diethanolamine, as solvents for desulfurization and decarburization. The wastewater produced in the alcohol amine desulfurization process is mainly composed of alcohol amines, and also contains a small amount of hydrocarbons and a small amount of decomposition products, such as amides, thiosulfuric acids, thiocyanates, etc., alcohol amine wastewater ...

Claims

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Application Information

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IPC IPC(8): C02F1/467C02F1/52C02F1/56C02F101/34C02F101/38
CPCC02F1/5236C02F1/4672C02F1/56C02F2101/38C02F2101/34
Inventor 叶芳芳张帅李长刚詹彤陈田福王尚芝谢文玉李德豪刘志森王儒珍梁家豪杨振兴李阳王储叶绮彤钟英佳陈茜文涛陈亮郑良浩
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH