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Method for treating VOCs waste gas in petrochemical industry through normal-temperature high-efficiency catalytic degradation

A catalytic degradation and petrochemical technology, which is applied in the direction of chemical instruments and methods, separation methods, physical/chemical process catalysts, etc., can solve the problems of complex structure of catalytic reaction tower, unfavorable popularization and application, and large energy consumption, so as to reduce reaction activation Energy, avoid agglomeration, long service life

Inactive Publication Date: 2016-10-26
淄博宝泉环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still necessary to heat the exhaust gas, increase the temperature of the exhaust gas, and consume a lot of energy; in addition, the internal structure of the catalytic reaction tower is complex, and two kinds of catalytic beds are installed in the same tower, which requires high towers and is not conducive to industrial application.

Method used

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  • Method for treating VOCs waste gas in petrochemical industry through normal-temperature high-efficiency catalytic degradation
  • Method for treating VOCs waste gas in petrochemical industry through normal-temperature high-efficiency catalytic degradation
  • Method for treating VOCs waste gas in petrochemical industry through normal-temperature high-efficiency catalytic degradation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The steps of waste gas produced in the present invention's control of petroleum refining process are as follows:

[0035] (1) The exhaust gas enters the first spray tower from the bottom, and in the first spray tower, it collides with the alkaline spray liquid sprayed from top to bottom, and the acid components in the spray liquid and the exhaust gas form salt, and dust is collected, discharged from the bottom of the first spray tower, and the treated waste gas is discharged from the top of the first spray tower;

[0036] (2) The exhaust gas discharged from the first spray tower enters the second spray tower from the bottom, and collides with the spray liquid sprayed from top to bottom in the second spray tower to dissolve the soluble components in the exhaust gas A solution is formed, the solution is discharged from the bottom of the second spray tower, and the waste gas after spraying treatment is discharged from the top;

[0037] (3) The exhaust gas discharged from ...

Embodiment 2

[0057] The difference between this embodiment and Embodiment 1 is: CeMnO 3 / TiO 2 @@SiO 2 The specific preparation process conditions of the catalyst are different. Specifically:

[0058] The rotating speed of stirring in the step a is 450r / min; Nanoscale CeMnO in the step b 3 / TiO 2 MediumCeMnO 3 The mass load of the mass loading is 6%; the wavelength of ultraviolet light in step c is 240nm; the time of the hydrothermal reaction in step c is 8h in step d, the carbon layer thickness is 3nm, and the carbon layer accounts for the nanometer CeMnO after coating 3 / TiO 2 4% of the total mass of the catalyst; the silicon layer accounts for the CeMnO after coating in step e 3 / TiO 2 30% of the total mass of the catalyst.

Embodiment 3

[0060] The difference between this embodiment and Embodiment 1 is: CeMnO 3 / TiO 2 @@SiO 2 The specific preparation process conditions of the catalyst are different. Specifically:

[0061] The rotating speed of stirring in the step a is 600r / min; Nanoscale CeMnO in the step b 3 / TiO 2 MediumCeMnO 3 The mass load of the mass loading is 8%; the wavelength of ultraviolet light in step c is 275nm; the time of hydrothermal reaction in step c is 10h in step d, and the thickness of carbon layer is 4nm, and carbon layer accounts for nanometer CeMnO after coating 3 / TiO 2 5% of the total mass of the catalyst; the silicon layer accounts for the CeMnO after coating in step e 3 / TiO 2 40% of the total mass of the catalyst.

[0062] Using the above method, the comparison of VOCs before and after treatment in petrochemical plants, the results are shown in the table below:

[0063]

[0064] It can be seen from the comparison of the VOCs content before and after the treatment that...

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Abstract

The invention discloses a method for treating VOCs waste gas in petrochemical industry through normal-temperature high-efficiency catalytic degradation and belongs to the technical field of waste gas treatment. The method disclosed by the invention comprises the following steps of: enabling waste gas to enter a first spraying tower from the bottom, collide relative to each other with alkaline spraying liquid sprayed from top to bottom and neutralize acid ingredients to form salt, trapping dust, discharging from the bottom, and enabling the waste gas to be discharged from the top; enabling the waste gas to enter a second spraying tower from the bottom, collide relative to each other with spraying liquid sprayed from top to bottom and dissolve soluble ingredients to form a dissolved solution, discharging from the bottom, introducing ozone into the waste gas discharged from the top, and carrying out oxidation reduction reaction under the action of a CeMnO3 / TiO2@SiO2 catalyst to generate CO2 and H2O, so that waste gas treatment is completed. The treatment method disclosed by the invention has the advantages that a large number of 'gas state' hydroxyl free radicals are produced and released and are fully contacted with gas state VOCs molecules as no interphase resistance exists, so that efficiency of treating 'gas' with 'gas' is greatly improved, and VOCs are rapidly and efficiently degraded into micromolecules such as CO2 and H2O and extremely small amount of inorganic salt.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a method for catalytically degrading VOCs waste gas in the petrochemical industry at room temperature with high efficiency. Background technique [0002] The petrochemical industry is a pillar industry in my country. It processes crude oil into various petroleum products through a series of processes such as atmospheric and vacuum distillation, catalytic cracking, delayed coking, catalytic reforming, gas processing and product refining. The main raw materials of petroleum refining enterprises are hydrocarbons and some trace elements such as sulfur and nitrogen, and there are a large amount of alkanes in hydrocarbons, and a small amount of aromatic hydrocarbons and cycloalkanes. Therefore, volatile organic compounds (VOCs) such as benzene, phenols, organic sulfides, and organic chlorides are emitted during the petroleum refining process. [0003] According...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/86B01D53/78B01D53/44B01D53/40B01D47/06B01J23/34
CPCB01D47/06B01D53/40B01D53/75B01D53/78B01D53/8687B01D2251/104B01D2255/2065B01D2255/20707B01D2255/2073B01D2255/30B01D2258/02B01D2259/122B01J23/34Y02P70/10
Inventor 李其忠丁辉
Owner 淄博宝泉环保工程有限公司
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