Safety disposal method and device for exhaust waste gas of petrochemical wastewater treatment plant

A petrochemical sewage and waste gas treatment device technology, which is applied to chemical instruments and methods, separation methods, air quality improvement, etc., can solve the problems that exhaust gas cannot be recovered through condensation, deep condensation consumes a lot of energy, and instrument lags, etc., to achieve long-term guarantee The effects of stable and safe operation, improved safety and reliability, no explosion risk and unsafe hidden danger

Inactive Publication Date: 2018-06-12
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, waste gas discharged from petrochemical sewage treatment plants generally cannot be recovered through condensation, and deep condensation consumes a lot of energy, and then treated by adsorption method, there are post-treatment problems such as saturated regeneration of adsorbents
[0007] In the current waste gas treatment facilities, such as catalytic oxidation devices, instruments such as combustible gas alarms are generally installed as safety protection for waste gas treatment devices, but such instruments generally have hysteresis. According to the general gas flow rate, high-concentration gas has already entered After 10-30s from the exhaust gas treatment main device, the combustible gas alarm and other online analysis instruments will respond, which exposes the exhaust gas treatment device to the risk of high-concentration exhaust gas explosion for a short time, which is extremely unsafe

Method used

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  • Safety disposal method and device for exhaust waste gas of petrochemical wastewater treatment plant

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Experimental program
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Effect test

Embodiment 1

[0028] The sewage treatment plant of a refining and chemical enterprise has structures such as collection wells, lifting tanks, adjustment tanks, grease traps, and flotation tanks for the treatment of oily and salty wastewater. All structures are sealed with covers, and exhaust gas is emitted from each structure through induced draft fans. Introduce a catalytic oxidation device for centralized treatment. On the sealing covers of all structures, there is an automatically adjustable shutter-type gas displacement device. There are oil-water interface meters in the collection wells, lifting tanks, and regulating tanks to monitor the quality of upstream water.

[0029] When light oil enters the water collection well under abnormal conditions, the oil-water detector immediately gives a signal, which is adjusted through the exhaust interlock control valve to reduce the bleed air of the structure by 50%. When the combustible gas concentration monitor detects the exhaust gas and combustib...

Embodiment 2

[0031] The sewage treatment plant of a refining and chemical enterprise has structures such as collection wells, lifting tanks, adjustment tanks, grease traps, and flotation tanks for the treatment of oily and salty wastewater. All structures are sealed with covers, and exhaust gas is emitted from each structure through induced draft fans. Introduce a catalytic oxidation device for centralized treatment. On the sealing covers of all structures, there is an automatically adjustable shutter-type gas displacement device. There are oil-water interface meters in the collection wells, lifting tanks, and regulating tanks to monitor the quality of upstream water.

[0032] When the oil-water detector does not give a signal, and the combustible gas concentration monitor detects that the exhaust gas and combustible gas concentration increases and reaches 20% LEL, the combustible gas concentration monitor sends an alarm signal to start the shutter type gas replacement on the cover of each st...

Embodiment 3

[0034] The sewage treatment plant of a refining and chemical enterprise has structures such as collection wells, lifting tanks, adjustment tanks, grease traps, and flotation tanks for the treatment of oily and salty wastewater. All structures are sealed with covers, and exhaust gas is emitted from each structure through induced draft fans. Introduce a catalytic oxidation device for centralized treatment, install a flame arrestor and a combustible gas concentration monitor in the exhaust gas collection pipeline. Pipeline gas displacement equipment is installed on the sealing covers of all structures, and the gas displacement pipeline is equipped with regulating valves. Oil-water interface meters are installed in the collection wells, lifting tanks, and regulating tanks to monitor the quality of the upstream water. The bleed air outlet pipelines of each structure are equipped with exhaust interlocking control valves.

[0035] When a large amount of light oil enters the collection w...

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Abstract

The invention relates to a safety disposal method and device for an exhaust waste gas of a petrochemical wastewater treatment plant. With respect to the characteristics of waste gases of different emission sources of a petrochemical wastewater treatment plant, an oil and water detector, an exhaust interlocking control valve, a combustible gas concentration monitor, gas replacement equipment and the like are arranged to perform monitoring and interlocking control on abnormal working conditions, so that long-term stable running of a waste gas disposal device is guaranteed, explosion risks and potential safety hazards are avoided, and stable, efficient and safe disposal of the exhaust waste gas of the petrochemical wastewater treatment plant is realized.

Description

Technical field [0001] The invention belongs to the technical field of waste gas treatment, and specifically relates to a method and device for the safe treatment of waste gas discharged from a petrochemical sewage treatment plant, especially for oil traps, flotation tanks, tanks in tanks, regulating tanks, and slop tanks in petrochemical sewage treatment plants. , Safe treatment methods and devices for waste gas discharged from structures such as the total sewage inlet. Background technique [0002] Sewage treatment plant is an important sewage treatment facility for petrochemical enterprises. Generally, there are structures such as collection tank (collection well), tank-in-tank, adjustment tank (pool), grease trap, flotation tank, and aeration tank. The aeration tank mainly uses biochemical methods to treat low-concentration sewage, which emits a low concentration of waste gas and a very large amount of waste gas. Structures such as grease traps, flotation tanks, tanks in tan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/84B01D53/02G05D27/02
CPCB01D53/02B01D53/84B01D53/86B01D53/8687G05D27/02Y02A50/20
Inventor 王筱喃赵磊王新
Owner CHINA PETROLEUM & CHEM CORP
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