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A method for treating self-sustained combustion of VOCs by catalytic ignition at room temperature

A technology of catalytic ignition and treatment method, applied in combustion methods, combustion types, incinerators, etc., can solve the problems of difficult recycling and comprehensive utilization, insufficient attention to waste gas emission treatment, small total amount, etc., and achieve good water quality. Thermal stability and high temperature stability, good catalytic combustion activity, environmental protection effect

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, petrochemical small-scale and pilot-scale test devices produce VOCs waste gas containing a certain amount of low unsaturated hydrocarbons. enough attention
So far, there is still a lack of catalytic combustion technology that is considered to have relatively high economic value for this type of VOCs exhaust gas at home and abroad.

Method used

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  • A method for treating self-sustained combustion of VOCs by catalytic ignition at room temperature
  • A method for treating self-sustained combustion of VOCs by catalytic ignition at room temperature

Examples

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Effect test

Embodiment 1

[0035] This example is used to illustrate a method for treating VOCs waste gas containing a certain amount of low unsaturated hydrocarbons by catalytic ignition at room temperature of the present invention.

[0036] The finished catalyst A was loaded into the reactor, and the catalyst loading amount was 0.02L, accounting for 80% by volume of the fixed bed reactor. When the temperature of the catalyst bed in the reactor equipped with the doped noble metal composite oxide catalyst is 33 °C, the volume flow rate of VOCs waste gas of 12 L / h (the composition is shown in Table 1) and 1.5 L / h of hydrogen Pass into the reactor together, and then pass in 20L / h of air to make the VOCs waste gas catalytically ignite, and the temperature of the catalyst bed is rapidly raised to 450 °C; enter the catalytic self-sustained combustion stage, and then stop the flow of hydrogen and reduce the volume of VOCs waste gas. The flow rate was adjusted to 6L / h, and air with a volume flow of 75L / h was i...

Embodiment 2

[0045] This example is used to illustrate a method for treating VOCs waste gas containing a certain amount of low unsaturated hydrocarbons and hydrogen by catalytic ignition at room temperature of the present invention.

[0046] The finished catalyst A was loaded into the reactor, and the catalyst loading amount was 0.02L, accounting for 80% by volume of the fixed bed reactor. When the temperature of the catalyst bed in the reactor equipped with the doped noble metal composite oxide catalyst is 33 °C, the VOCs waste gas (the composition is shown in Table 2) with a volume flow of 12 L / h is passed into the reactor, and then Introduce 20L / h of air to catalyze the ignition of VOCs waste gas, and the temperature of the catalyst bed is rapidly raised to 450°C; enter the catalytic self-sustained combustion stage, then adjust the volume flow of VOCs waste gas to 6L / h, and feed 75L / h With the volume flow of air, the temperature of the catalyst bed rapidly increased to about 650 °C, and...

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Abstract

The invention relates to a treatment method for the self-sustained combustion of VOCs catalyzed and ignited at room temperature in the technical field of VOCs-containing waste gas treatment. The treatment method includes the following steps: in the catalytic ignition stage, under normal temperature and pressure, when the temperature of the catalyst bed in the reactor equipped with the doped noble metal composite oxide catalyst is 30-45° C., the VOCs waste gas is removed. and H 2 Pass into the reactor, and then pass in air to make the VOCs exhaust gas catalytically ignite, enter the catalytic self-sustained combustion stage, and then stop feeding H 2 And adjust the feed flow of VOCs waste gas, and adjust the volume flow of incoming air, the reaction is developed into a self-sustained combustion reaction of VOCs waste gas, and the VOCs waste gas is completely oxidized into carbon dioxide and water and then discharged through the reactor outlet. Compared with the traditional VOCs catalytic combustion ignition technology, this method does not require external auxiliary heating, and does not require a new ignition device.

Description

technical field [0001] The invention relates to the technical field of VOCs-containing waste gas treatment, and further, relates to a treatment method for catalyzing the self-sustained combustion of VOCs at room temperature. Background technique [0002] Common VOCs purification technologies include condensation method, adsorption method, absorption method, catalytic method, biological method, etc. These methods are widely used. The catalytic method is to heat the VOCs to the light-off temperature (200-450°C) to realize the catalytic and non-catalytic combustion reactions of the VOCs to generate carbon dioxide and water. [0003] Patent CN106979526A provides a low-temperature plasma rapid ignition method for catalytic self-sustained combustion of VOCs at normal temperature and pressure. By placing a catalyst in the discharge area of ​​the plasma reactor, after applying a voltage, the gas discharge generates a low-temperature plasma. The waste gas to be treated containing a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G7/07
CPCF23G7/07Y02A50/20
Inventor 杨沙沙王国清王育张利军刘小波彭晖刘俊杰马天石
Owner CHINA PETROLEUM & CHEM CORP
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