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Emission reduction system and method for waste gas discharged by storage tank

A storage tank and working fluid storage tank technology, which is applied to tank trucks, transportation and packaging, transportation of passenger cars, etc., can solve the problems of pollutant discharge from storage tanks, complex treatment processes, and high equipment investment, and achieve simple equipment and operation, and save equipment. The effect of low investment and operating costs

Pending Publication Date: 2021-06-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the methods described in patent CN105737517 A and patent CN108069155A, it is necessary to set up an oil and gas recovery system and communicate with the gas pipeline network, the system is complex, and the device investment is high
[0006] Existing storage tanks are mainly vaulted roof tanks, inner floating roof tanks and outer floating roof tanks. During the breathing process of storage tanks, there are suction and exhaust processes, and there are pollutants discharged from storage tanks. The process is relatively complicated and the treatment cost is high

Method used

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  • Emission reduction system and method for waste gas discharged by storage tank

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Embodiment 1

[0036] like figure 1 As shown, the storage tank emission reduction system of the present invention includes an oil storage tank 1, a gas storage tank 2, a working fluid storage tank 7, a first working fluid pump 5, a second working fluid pump 6 and related detection and control instruments. The top of the oil storage tank 1 communicates with the top of the gas storage tank 2 through a gas connecting pipe 3 . The top of the gas storage tank 2 is provided with a waste gas discharge pipeline 4 , and the bottom of the gas storage tank 2 is provided with a liquid outlet 9 and a liquid inlet 10 . A liquid outlet 12 and a liquid inlet 11 are respectively provided at the bottom and middle of the working fluid storage tank 7 . The inlet and outlet of the first working fluid pump 5 communicate with the liquid outlet 9 of the gas storage tank and the liquid inlet 11 of the working fluid storage tank respectively. The inlet and outlet of the second working fluid pump 6 communicate with ...

Embodiment 2

[0039] combine figure 1, the method for reducing emission of exhaust gas in the tank area of ​​the present invention includes the following content: when the oil storage tank 1 produces exhaust gas and the tank top pressure is higher than the exhaust pressure (that is, the high value of the exhaust pressure of the storage tank, the high value of the exhaust pressure can be the pressure Any value in the range of 1~2kPa), start the first working fluid pump 5, reduce the liquid level in the gas storage tank 2, and send part of the working fluid to the working fluid storage tank 7, and the exhaust gas generated by the oil storage tank 1 (Oil gas) enters the gas storage tank 2 through the gas connecting pipe 3. When the tank top pressure of the oil storage tank 1 drops to 0.2-0.5 kPa, stop the first working fluid pump 5; The working fluid pump 6 discharges the working fluid in the working fluid storage tank 7 to the gas storage tank 2, increases the liquid level in the gas storage...

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Abstract

The invention discloses an emission reduction system for waste gas discharged by a storage tank. The emission reduction system for the waste gas comprises an oil product storage tank, a gas storage tank, a working liquid storage tank, a first working liquid pump, a second working liquid pump and a related detection control instrument. The tank top of the oil product storage tank communicates with the tank top of the gas storage tank through a gas connecting pipe; meanwhile, the tank top of the gas storage tank is provided with a waste gas discharge pipeline; a liquid outlet and a liquid inlet are formed in the bottom of the gas storage tank; the liquid outlet of the gas storage tank communicates with the liquid inlet of the working liquid storage tank through the first working liquid pump; and the liquid inlet of the gas storage tank communicates with the liquid outlet of the working liquid storage tank through the second working liquid pump. According to the emission reduction system, the pressure of the gas storage tank is adjusted by adjusting the liquid level of the gas storage tank, and then waste gas emission reduction of the storage tank is achieved. The system has the characteristics of safety, reliability, simplicity in equipment operation, low operation cost, obvious energy-saving effect and the like.

Description

technical field [0001] The invention relates to the technical field of environmental protection and energy saving, in particular to a method and a system for reducing the emission of exhaust gas from a storage tank. Background technique [0002] During the storage and transportation of oil products and chemicals, a large amount of oil gas or volatile organic compounds (VOCs) escape. According to statistics, the annual loss of light oil products accounts for about 0.5% of light oil products. On the one hand, it leads to a large amount of waste of oil and gas or volatile organic compounds, reducing the economic benefits of enterprises, and on the other hand, it leads to serious environmental pollution. . In addition, since oil and air can easily form explosive mixtures (the lower explosion limit is generally 1% to 6%), the escape of oil and gas will cause the concentration of oil and gas around the corresponding facilities to easily reach the explosion limit, and the oil and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D90/48B65D90/00B65D90/28B65D88/74
CPCB65D90/48B65D90/00B65D90/28B65D88/744
Inventor 刘忠生廖昌建王海波朴勇戴金玲
Owner CHINA PETROLEUM & CHEM CORP