Ammonia release adsorption device in the hydration reaction process of coal ash-based filling paste, adsorption method and detection method

Abstract

The invention relates to an ammonia release adsorption device in the hydration reaction process of coal ash-based filling paste. The device comprises a curing chamber I for placing the coal ash-basedfilling paste, a gas collecting hood with a unique outlet for air and gas is arranged above the curing chamber I, and the outlet is connected with a gas inlet of an ammonia adsorption tower II througha pipeline with a sucking pump and a gas flowmeter. Absorption liquid is arranged in the ammonia gas adsorption tower II and located below the gas inlet, a hollowed-out filler supporting plate, an absorption liquid collecting and redistributing device, a filler pressing device and an absorption liquid distributor are sequentially arranged above the gas inlet, and a tail gas exhaust port is formedin the top of the ammonia gas adsorption tower II; and the absorption liquid distributor is connected with absorption liquid at the bottom of the ammonia gas adsorption tower II through a return pipewith a return pump. The invention further provides an adsorption method based on the adsorption device and an ammonia release detection method, and the total release amount and the release rule of ammonia gas in the hydration reaction process of the denitrified fly ash-based filling paste can be accurately mastered.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and relates to the adsorption and detection of hazardous gases in the mining process, in particular to an ammonia release adsorption device and detection method during the hydration reaction of a fly ash-based filling paste. Background technique [0002] Coal mines mainly adopt the longwall roof caving mining method of underground workers, which has caused rock collapse, land subsidence, groundwater resources and ecological damage, and a large number of coal pillars left underground, especially the "three downs" (under structures, Under the railway and under the water body) the amount of coal pressure is increasing, resulting in a serious waste of resources. Filling mining is a mining method that can effectively control the subsidence of the overlying strata above the goaf roof volume, and can effectively solve the above mining problems. In addition, the pithead power station can convert the...

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Problems solved by technology

[0004] In order to solve the above-mentioned problems such as denitrification fly ash-based filling and mining paste, the residual ammonia escapes and the lack of detection devices and methods with simple and quick operation, accurate detection results, and strong applicability, the purpose of the present invention is to provide a fly ash Ammonia release ads...

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