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Waste water treating method for methyl ethyl ketone production

A methyl ethyl ketone and wastewater technology, which is applied in biological water/sewage treatment, water/sewage treatment, sustainable biological treatment, etc., can solve the literature reports of no methyl ethyl ketone production discharge wastewater treatment method, the guiding significance is not strong, and the treatment effect is not good. and other problems, to achieve the effect of stable and reliable treatment effect, low equipment requirements and low cost

Inactive Publication Date: 2004-04-21
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

However, steam stripping is basically used, and useful substances need to be recovered, so the guiding significance for the treatment of wastewater discharged from MEK production is not strong
[0008] Therefore, as far as the current research status at home and abroad is concerned, there is no literature report on the wastewater treatment method for the production of methyl ethyl ketone
At the same time, according to the previous analysis, there are still some problems in the direct use of some existing steam stripping technologies for the treatment of wastewater discharged from MEK production: for example, steam stripping often uses steam for desorption, which is dangerous and expensive
The blow-off method uses air to blow off at room temperature, and the treatment effect is not good.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] The wastewater discharged from MEK production is heated to 50°C and then enters the stripping tower. The raw water CODcr is 14963mg / L. The waste water flows down from the top of the tower through the liquid distribution device, the air enters from the bottom of the tower, and the waste water spray density is 40m 3 / m 2 h, the gas-water ratio is 50, and the theoretical plate number of the stripper is 18.

[0030] After air stripping treatment, the CODcr of MEK production wastewater is reduced to 4300mg / L, reaching the pretreatment target.

[0031] After the air stripping treatment water is subjected to contact oxidation treatment, the CODcr of the effluent is reduced to 80mg / L, which meets the national secondary discharge standard.

Embodiment 2

[0033] The wastewater discharged from MEK production is heated to 90°C and then enters the stripping tower. The raw water CODcr is 14963mg / L. The waste water flows down from the top of the tower through the liquid distribution device, the air enters from the bottom of the tower, and the waste water spray density is 5m 3 / m 2 h, the gas-water ratio is 150, and the theoretical plate number of the stripper is 30.

[0034] After air stripping treatment, the CODcr of wastewater discharged from MEK production was reduced to 2100mg / L, reaching the pretreatment target.

[0035] After the air stripping treatment water is subjected to contact oxidation treatment, the CODcr of the effluent is reduced to 70mg / L, which meets the national secondary discharge standard.

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Abstract

A process for treating the sewage discharged in production of paramethadione includes such steps as heating it to a certain temp, pumping it in stripping tower containing filler, counter-current stripping, biochemical treating, and exhausting the waste gas to high space or catalytic burning it. Its advantages are high effect and high biochemical treating efficiency.

Description

technical field [0001] The invention relates to a treatment method of organic chemical wastewater, in particular to a treatment method of methyl ethyl ketone (MEK) production and discharge wastewater. Background technique [0002] Methyl ethyl ketone (MEK) is an excellent solvent and an important raw material for fine chemicals. It is mainly used in the fields of paint production, lubricating oil dewaxing, tape cleaning, and paint strippers. [0003] In actual production, due to the complex composition of the wastewater discharged from the MEK production unit, it contains various pollutants such as methyl ethyl ketone, methanol, tert-butanol, and sec-butanol, and the CODcr is as high as 15,000 mg / L. It is difficult to achieve standard discharge through direct biochemical treatment. Due to the complex composition of wastewater from MEK production, it is difficult to treat it by general coagulation and biochemical methods. Although activated carbon adsorption and advanced oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/00C02F1/00C02F3/12C02F9/08
CPCY02W10/10
Inventor 程学文胡家祥栾金义王文军杜蓓王宜军
Owner CHINA PETROLEUM & CHEM CORP
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