Burning system of discharging combustible exhaust gas in multistage, and method of application

Abstract

A multistage discharge-combustion system of combustible waste gas consists of air exhaust subsystem including air exhaust general pipe, multiple air exhaust branch pipe connected to general pipe and controllable valve set on said branch pipe; combustion subsystem including two sets of combustion furnaces with multistage burners formed by multiple burner and air exhaust branch pipe; and controllerbeing used to control valves set on various stages of burners.

Description

technical field [0001] The invention relates to a combustible waste gas emission combustion system and its use method, in particular to a combustible waste gas multi-stage discharge combustion system and its use method. Background technique [0002] Many production devices of natural gas, petrochemical and other enterprises will produce a large amount of combustible waste gas that cannot be used and must be discharged during the production process or in an accident state. As the production scale of such enterprises increases, the discharge of combustible waste gas also increases. The general treatment methods for these large-volume combustible gases are as follows: [0003] One is direct venting at high points, that is, the combustible gas is vented directly through a chimney of a certain height, and the harm of the combustible gas to the surrounding environment is reduced through the diffusion of the atmosphere; but since no treatment measures are taken for the combustible...

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Problems solved by technology

[0003] One is direct venting at high points, that is, the combustible gas is vented directly through a chimney of a certain height, and the harm of the combustible gas to the surrounding environment is reduced through the diffusion of the atmosphere; but since no treatment measures are taken for the combustible gas, this treatment method will It directly pollutes the atmospheric environment, and also has potential safety hazards; as the requirements for environmental protection and safety become increasingly stringent, this treatment method is rarely used;

[0004] The other is an elevated flare, which burns the combustible gas through the flare head burner erected at a high altitude, which can reduce environmental pollution, but there are problems such as high noise, high heat radiation intensity, black smoke, difficult ignition, light pollution, and maintenance. Difficulties and other disadvantages; this is currently the most used method among existing torches in refining and chemical enterprises;

[0005] The Chinese utility model patent No. 02265117.9, titled "An Environmentally Friendly Exhaust Gas Emission Ground Combustion Device", discloses a combustible exhaust gas emission combustion system. The radiation-proof sound-absorbing screen on the outer edge of the furnace body, and the burner is set on the ground can solve the problems of noise, heat radiation, and difficulty in ignition; Can be limited to less than 80 tons per hour

For a long time, in order to improve the processing capacity of the combustible waste gas emission combustion system, those skilled in the art are accustomed to increasing the number of burners in the combustion furnace and increasing the diameter of the combustion furnace. With the expansion of the production scale of the enterprise, the combustible waste gas The emission usually reaches hundreds of tons or even more than a thousand tons per hour. The device designed according to this system mode can no longer meet the requirements of treating large-volume exhaust gas

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