Coal storage bunker low-pressure CO2 partial inerting protection method

Abstract

The invention discloses a coal storage bunker low-pressure CO2 partial inerting protection method. The method comprises the steps that 1, a temperature detector or CO concentration detector on a certain inerting branch sends an alarming signal; 2, a controller receives the alarming signal, and a main control valve is opened; 3, the controller controls a selection valve to be opened and starts working of an air temperature type gasifier; 4, the controller opens a corresponding partition valve on the inerting branch, the content of CO2 needing to be injected into a coal storage bunker is calculated, and the pressure and the flow rate of a pressure adjusting device and a flow limiting device are adjusted; 5, the controllers simultaneously opens a plurality of spray heads of a spraying deviceon the inerting branch, and the CO2 is sprayed to the corresponding zone inside the coal storage bunker; and 6, after spraying is completed, the controller sequentially closes the spraying device, thepartition valve, the selection valve and the main control valve. The coal storage bunker low-pressure CO2 partial inerting protection method has the beneficial effects that the low-pressure CO2 is adopted to serve as a work medium to partially protect flammable points in the coal storage bunker, the optimal effect is achieved, and the storage amount and using amount of the low-pressure CO2 are decreased.

Description

technical field [0001] The invention relates to the technical field of inerting protection for coal storage bunkers, in particular to a low-pressure CO 2 Locally inert protected methods. Background technique [0002] For the closed coal storage bunkers of power plants, it is generally used to use nitrogen to inert the interior of the coal storage bunkers. A nitrogen generator is installed at the front end of the inerting protection system of the coal storage bunkers, and nitrogen is obtained by using air separation technology. The method of using self-made nitrogen for inert protection is more economical due to the wide source of nitrogen and can be prepared at any time, but the effect is not good. [0003] When the raw coal in the raw coal bunker and pulverized coal bunker of the power plant comes into contact with the air, it will undergo oxidation reaction and release heat and carbon monoxide. The collision and long-term stacking of the raw coal in the raw coal bunker wi...

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Problems solved by technology

[0004] However, for the inerting protection of large-volume spherical coal storage bunkers or silos with a coal storage capacity of up to 100,000 tons, the inerting protection effect is not good if the conventional nitrogen gas is used; 2 Inerting protection system, low pressure CO required 2 The quantity is huge, the economy is not high, and a large amount of low-pressure CO is stored on site 2 Affect site layout and aesthetics

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