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A comprehensive treatment method and device for waste gas discharged from a petrochemical sewage treatment plant

A petrochemical sewage and treatment field technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve problems such as explosion risks, unsafe hidden dangers, and no treatment measures, so as to enhance stability and safety, and maintain stability Operation and guaranteed service life effect

Active Publication Date: 2019-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this kind of waste gas, special waste gas treatment devices are generally introduced, which has the risk of explosion and unsafety hazards, and the treatment scale is large and the treatment cost is high.
[0005] CN200310104990.5 discloses a method for purifying high-concentration organic waste gas, which uses catalytic combustion to treat high-concentration organic waste gas, including pretreatment of waste gas and corresponding entrained air, heat exchangers, heaters, catalytic oxidation reactors, etc. equipment, but this method is mainly aimed at the exhaust gas with a total hydrocarbon concentration of 2000-25000 μL / L. If the exhaust gas is higher than this range, or even reaches the explosion limit of combustibles, there will be no effective treatment measures
CN200810012686.0 discloses a method for treating exhaust gas from a storage tank area, which uses condensation and adsorption to treat exhaust gas from similar acidic water storage tank areas and oil product tank areas. However, waste gas from petrochemical sewage plants generally cannot be recovered through condensation, and deep condensation consumes a lot of energy, and then treated by adsorption, there are also post-treatment problems such as saturated regeneration of adsorbents

Method used

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  • A comprehensive treatment method and device for waste gas discharged from a petrochemical sewage treatment plant

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Effect test

Embodiment 1

[0030] Adopt the present invention to attach figure 1 The process is to treat the exhaust gas emitted by a sewage treatment plant of a refinery. The sources of exhaust gas mainly include waste water treatment structures such as grease traps, flotation tanks, tanks in tanks, regulating tanks, and waste oil tanks. Among them, the exhaust gas emitted from exhaust gas sources such as grease traps and flotation tanks is relatively stable, and the exhaust gas volume is about 2500Nm 3 / h, the total hydrocarbon concentration of exhaust gas is 2000-9000mg / m 3 , the total sulfide content is 30-500mg / m 3 ;The tank-in-tank, regulating tank, waste oil tank, etc. will intermittently emit exhaust gas when the tank pressure increases due to material collection or temperature changes, and the exhaust gas volume is about 0-150Nm 3 / h, the total hydrocarbon concentration in the exhaust gas is 5000-200000mg / m 3 , falling into the explosion range of some pollutants, the total sulfide content is...

Embodiment 2

[0032] Adopt the present invention to attach figure 1 The process is to treat the exhaust gas emitted by a sewage treatment plant of a refinery. The sources of exhaust gas mainly include waste water treatment structures such as grease traps, flotation tanks, tanks in tanks, regulating tanks, and waste oil tanks. Among them, the exhaust gas emitted from exhaust gas sources such as grease traps and flotation tanks is relatively stable, and the exhaust gas volume is about 1500Nm 3 / h, the total hydrocarbon concentration of exhaust gas is 2000-10000mg / m 3 , the total sulfide content is 30-300mg / m 3 ;The tank-in-tank, regulating tank, waste oil tank, etc. will intermittently emit exhaust gas when the tank pressure increases due to material collection or temperature changes, and the exhaust gas volume is about 0-100Nm 3 / h, the total hydrocarbon concentration in the exhaust gas is 8000-200000mg / m 3 , falling within the explosion range of some pollutants, the total sulfide content...

Embodiment 3

[0034] Adopt the present invention to attach figure 1 The process is to treat the exhaust gas emitted by a sewage treatment plant of a refinery. The sources of exhaust gas mainly include waste water treatment structures such as grease traps, flotation tanks, tanks in tanks, regulating tanks, and waste oil tanks. Among them, the exhaust gas emitted from exhaust gas sources such as grease traps and flotation tanks is relatively stable, and the exhaust gas volume is about 1500Nm 3 / h, the total hydrocarbon concentration of exhaust gas is 2000-10000mg / m 3 , the total sulfide content is 100-500mg / m 3 ;The tank-in-tank, regulating tank, waste oil tank, etc. will intermittently emit exhaust gas when the tank pressure increases due to material collection or temperature changes, and the exhaust gas volume is about 0-100Nm 3 / h, the total hydrocarbon concentration in the exhaust gas is 8000-200000mg / m 3 , falling into the explosion range of some pollutants, the total sulfide content ...

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Abstract

The invention relates to a comprehensive treatment method of waste gas discharged by a petrochemical sewage treatment plant. The method comprises the following steps: dividing waste gas sources of the petrochemical sewage treatment plant into an unstable waste gas source and a stable waste gas source, wherein when waste gas is charged from the unstable waste gas source, enabling the waste gas to enter diesel absorption equipment for treatment; when no waste gas is charged from the unstable waste gas source, introducing a certain amount of air into the diesel absorption equipment, maintaining the pressure of the diesel absorption equipment to be stable and ensuring the concentration of organic matters in the waste gas to be stabilized at 5,000-40,000mg / m<3> after treatment; then mixing the waste gas with waste gas discharged from the stable waste gas source, enabling the mixed gas into desulfurization equipment for treatment, adjusting the mixed gas with air to below 25% of a lower explosive limit, dedusting with a filter, performing catalytic oxidation after pre-heating and heating, recycling heat and discharging purified gas according to a corresponding standard. According to the method, for the characteristics of the waste gas discharged from different discharge sources of the sewage treatment plant, diffluent-confluence treatment is carried out on the waste gas, therefore, the method has the characteristics of stable and reliable device, high safety, good treatment effect, small energy consumption and the like.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a comprehensive treatment method and device for waste gas discharged from a petrochemical sewage treatment plant, especially for oil separation tanks, flotation tanks, tanks in tanks, regulating tanks, and waste oil tanks in petrochemical sewage treatment plants A comprehensive treatment method for waste gas discharged from structures such as the total import of sewage, etc. Background technique [0002] The sewage treatment plant is an important sewage treatment facility for petrochemical enterprises. Sewage treatment plants of petrochemical enterprises generally have structures such as aeration tanks, grease traps, flotation tanks, tanks in tanks, regulating tanks, and waste oil tanks. The aeration tank mainly uses biochemical methods to treat low-concentration sewage, and the concentration of emitted waste gas is low, and the amount of waste gas is ver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14B01D46/00B01D53/86B01D53/02B01D53/48B01D53/44B01D53/78
CPCB01D46/00B01D53/02B01D53/1493B01D53/44B01D53/48B01D53/507B01D53/78B01D53/8603B01D2251/304B01D2252/20B01D2257/30B01D2257/70B01D2258/02B01D2259/124
Inventor 刘忠生王新赵磊王海波郭兵兵
Owner CHINA PETROLEUM & CHEM CORP