Method for carrying out catalytic and oxidative treatment on waste gas produced by hydrogen peroxide propylene oxidation (HPPO) device

A catalytic oxidation and exhaust gas technology, applied in chemical instruments and methods, gas treatment, separation methods, etc., can solve the problem of exhaust gas not being discharged up to standard, and achieve good technical effects

Inactive Publication Date: 2017-11-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem that exhaust gas cannot meet the standard discharge in the prior art, and a new method for catalytic oxidation treatment of exhaust gas from HPPO unit is provided

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  • Method for carrying out catalytic and oxidative treatment on waste gas produced by hydrogen peroxide propylene oxidation (HPPO) device

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Comparison scheme
Effect test

Embodiment 1

[0018] The invention relates to a method for catalytic oxidation treatment of waste gas from HPPO devices, such as figure 1 As shown, the exhaust gas of the HPPO device described in the present invention mainly contains volatile organic pollutants such as propylene, methanol, propylene oxide, and sulfide VOC. The present invention fully considers the safety redundancy of the exhaust gas treatment system, and sets 2 sets of parallel heaters- Catalytic oxidation reactor unit equipment. ① Under normal operating conditions, both sets of heater-catalytic oxidation reactor unit equipment are put into operation, and each set of unit equipment operates at 50% load; ② When the heater fails and needs to be stopped for maintenance, the unit When the equipment stops running, the operating load of another set of unit equipment is increased to 100%; ③When the catalytic oxidation reactor catalyst needs to be regenerated, this set of unit equipment stops operating, and the operating load of t...

Embodiment 2

[0025] According to the conditions and steps described in Example 1, the production scale was changed to a 100,000-ton / year HPPO industrial production unit, and the process conditions of the hydrocarbon-containing waste gas of the HPPO unit to be treated are shown in Table 1.

[0026] Adopt the method for catalytic oxidation treatment waste gas of HPPO device of the present invention, heat exchanger operating temperature is 280 ℃, heater operating temperature is 310 ℃, catalytic oxidation reactor operating temperature is 310 ℃, operating pressure is 65KPa, catalyst is 100% palladium Noble metal honeycomb catalysts. Thus, the organic pollutant VOC in hydrocarbon-containing waste gas is treated by catalytic oxidation reaction, the VOC removal rate is above 96.3%, and the concentration of non-methane total hydrocarbons in the purified waste gas after treatment is reduced to 90mg / m 3 Below, it can be discharged directly at high altitude through the exhaust pipe.

Embodiment 3

[0028] According to the conditions and steps described in Example 1, the production scale was changed to a 300,000-ton / year HPPO industrial production unit, and the process conditions of the hydrocarbon-containing waste gas of the HPPO unit to be treated are shown in Table 1.

[0029]Using the method for treating waste gas from an HPPO device by catalytic oxidation of the present invention, the operating temperature of the heat exchanger is 210°C, the operating temperature of the heater is 295°C, the operating temperature of the catalytic oxidation reactor is 295°C, the operating pressure is 57KPa, and the catalyst is 70% platinum and 30% palladium noble metal honeycomb catalyst. Thus, the organic pollutant VOC in hydrocarbon-containing waste gas is treated by catalytic oxidation reaction, the VOC removal rate is above 96.6%, and the concentration of non-methane total hydrocarbons in the purified waste gas after treatment is reduced to 87mg / m 3 Below, it can be discharged dire...

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Abstract

The invention relates to a method for carrying out catalytic and oxidative treatment on waste gas produced by a hydrogen peroxide propylene oxidation (HPPO) device, mainly aiming at solving the problem that in the prior art, waste gas emission can not meet the standards. According to the method for carrying out catalytic and oxidative treatment on the waste gas produced by the HPPO device, after being preheated in a heat exchanger, the hydrocarbon-containing waste gas produced by the HPPO device respectively enters a first heater and a second heater so as to be heated to the catalytic and oxidative reaction temperature, and then respectively enters a first catalytic oxidation reactor and a second catalytic oxidation reactor so as to be subjected to an oxidation reaction, thus generating H2O and CO2; gases at outlets of the first catalytic oxidation reactor and the second catalytic oxidation reactor are mixed together and then enter the heat exchanger so as to exchange heat with the hydrocarbon-containing waste gas produced by the HPPO device; after heat exchange is finished, the concentration of non-methane hydrocarbon in the purified waste gas is reduced to 120mg/m<3> or less; the technical scheme of high-altitude emission better solves the problems. The method can be used for treating the waste gas produced by the HPPO device.

Description

technical field [0001] The invention relates to a method for catalytic oxidation treatment of waste gas from an HPPO device. Background technique [0002] Propylene oxide is a widely used basic chemical raw material, and its demand has continued to grow in recent years. The hydrogen peroxide method (HPPO method for short) is compared with the chlorohydrin method commonly used in my country to prepare propylene oxide, and has the characteristics of simple production process, less pollution and low energy consumption. The exhaust gas produced by the HPPO legal propylene oxide plant mainly comes from continuous emission sources such as HPPO plant process exhaust gas, vacuum system exhaust gas, sewage treatment plant exhaust gas, and intermittent emission sources such as storage tank exhaust gas. The hydrocarbon-rich components in the tail gas are mainly hydrocarbons such as propylene, methanol, and propylene oxide; these waste gases have high hydrocarbon content, and the exist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/72
CPCB01D53/72B01D53/86B01D53/8668B01D2256/22B01D2257/702B01D2257/708B01D2258/02Y02A50/20Y02C20/20
Inventor 叶志一陆璐施竞怡张斌李真泽杨建平何琨
Owner CHINA PETROLEUM & CHEM CORP
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