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Oil sludge tail gas treatment process

A tail gas treatment and process technology, applied in the field of sludge tail gas treatment technology, can solve problems such as failure to meet emission standards

Inactive Publication Date: 2017-05-17
江苏碧诺环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Oil sludge can be pyrolyzed to recover the oily substances in it, but the pyrolysis tail gas contains a large amount of organic matter, sulfide and nitrogen compounds, which cannot meet the national emission standards without treatment

Method used

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  • Oil sludge tail gas treatment process

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Experimental program
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Effect test

Embodiment 1

[0039] The oil sludge at the bottom of the tank is pyrolyzed at a temperature of 280°C and an absolute pressure of less than 900 mbar. After the steam obtained from pyrolysis is cooled, oil and pyrolysis tail gas are obtained, and the pyrolysis tail gas is sent to figure 1 shown in the tail gas treatment device for treatment.

[0040] Such as figure 1 As shown, the tail gas treatment device includes a counter-current lye washing tower 500 , a counter-current atomizing water washing tower 501 and a three-phase multi-media catalytic oxidation tower 502 . The alkali washing liquid in the countercurrent alkali washing tower 500 is 5% by weight of sodium hydroxide solution, the contact time between the alkali washing liquid and the tail gas is controlled to be 7 seconds, and the liquid-gas volume ratio is 5:1; the countercurrent atomizing water washing tower 501 The contact time between reclaimed water and the tail gas after alkali washing is 6 seconds, and the liquid-gas volume r...

Embodiment 2

[0042] The steps of Example 2 are basically the same as those of Example 1, except that the pyrolysis of oil sludge is divided into the first pyrolysis and the second pyrolysis, the temperature of the first pyrolysis is 105°C, the time is 2 hours, and the pressure is 800°C mbar, the temperature of the second pyrolysis is 260° C., the time is 3 hours, and the pressure is less than 50 mbar. The hydrogen sulfide content in the obtained tail gas is 0.01mg / m 3 , the hydrogen sulfide emission is 0.06Kg / h, and the odor concentration is 35. Exhaust gas meets national standards GB14554-93, GB16297-96 and GB18484-2001.

Embodiment 3

[0044] The step of embodiment 3 is substantially the same as that of embodiment 1, and the difference is that the alkali washing liquid is 1% by weight of sodium hydroxide solution in the countercurrent type alkali washing tower 500, and the contact time of the controlling alkali washing liquid and the tail gas is 15 seconds , the liquid-gas volume ratio is 3:1; the contact time between the water in the counter-current atomization water washing tower 501 and the tail gas after alkali washing is 6 seconds, and the liquid-gas volume ratio is 1:1; The residence time in the oxidation tower 502 is 30 seconds, the liquid-gas volume ratio is 6:1, the liquid phase includes 5% by weight of dilute sulfuric acid, 3% by weight of hydrogen peroxide and 10% by weight of ferrous chloride solution, the molar ratio of hydrogen peroxide and ferrous ions The weight ratio of dilute sulfuric acid to hydrogen peroxide is 1:4, and the specific surface area of ​​the nickel-based catalyst is 287 m 2 / ...

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Abstract

The invention relates to an oil sludge tail gas treatment process, which comprises the following steps of sequentially performing reverse flow alkali washing, reverse flow atomization water washing and multi-media catalytic oxidation treatment on oil sludge tail gas generated through oil sludge pyrolysis to obtain the treated tail gas. The process disclosed by the invention can be used for treating the oil sludge tail gas, so that the tail gas can conform to the national discharge standard.

Description

technical field [0001] The present disclosure relates to the technical field of oil sludge treatment, and in particular, relates to an oil sludge tail gas treatment process. Background technique [0002] Oily sludge is oily sludge, belonging to HW08 hazardous waste, which is flammable and toxic, and the toxic substances in oily sludge are difficult to degrade, causing serious harm to ecology and human health. [0003] The treatment of oily sludge is difficult and has not been effectively treated at present. Industries such as petroleum refining and chemical industry produce millions of tons of oily sludge every year, and the stock is huge. [0004] Sludge can be pyrolyzed to recover the oily substances in it, but the pyrolysis tail gas contains a large amount of organic matter, sulfide and nitrogen compounds, which cannot meet the national emission standards without treatment. Contents of the invention [0005] The purpose of the present disclosure is to provide a sludge ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/78B01D53/86B01D53/44
CPCB01D53/75B01D53/78B01D53/8687B01D2251/106B01D2255/20753
Inventor 蒋子才蒋子厚
Owner 江苏碧诺环保科技有限公司