A kind of coal mine underground mobile nitrogen production device and its technology

Abstract

The invention provides a coal mine underground mobile nitrogen production device and its technology, belonging to the technical field of underground nitrogen production, including an air compression mechanism, a membrane separation nitrogen production mechanism and a scaling constraint assembly. The coal mine underground mobile nitrogen generating device and its process filter and compress the air to obtain high-pressure gas through the air compression mechanism, and then produce high-pressure nitrogen through the membrane separation nitrogen generating mechanism, which can fully meet the needs of medium and long drilling holes in the coal mine At the same time, it can make up for the pressure loss during the nitrogen delivery process, improve the effect of nitrogen slag removal during the drilling process, and can replace the filter plate without stopping the machine, which can not only meet the needs of air filtration in nitrogen production in a timely manner At the same time, it can effectively avoid the problem that the unfiltered air directly enters the nitrogen generating device to affect the purity and flow of nitrogen, and improves the stability of the pressure value of nitrogen produced, as well as the purity and flow of nitrogen.

Description

Technical field [0001] The present invention relates to the field of undermined nitrogen production technology, specifically a coal mine underground mobile nitrogen making device and the process thereof. Background [0002] Coal mine drilling construction is one of the important steps of coal mining, in the drilling construction need to timely drilling process produced slag chips from the hole discharge, the current commonly used slag discharge method is hydraulic slag discharge, water as the medium of slag chips to wash and discharge the hole, but for soft crushing coal seam, the use of hydraulic slag will lead to the collapse of the hole wall itself is not strong to increase the waste hole rate, therefore, in the process of soft crushing coal seam drilling construction is usually used wind discharge slag, Although the wind slag discharge effectively reduces the waste hole rate, but its slag discharge process will promote the three necessary conditions for spontaneous combustion...

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Problems solved by technology

[0002] Underground coal mine drilling construction is one of the important steps in coal mining. During drilling construction, it is necessary to discharge the slag generated during the drilling process from the hole in time. At present, the commonly used slag discharge method is hydraulic slag discharge. Water is used as the medium to wash the slag and discharge it out of the hole. However, for soft and broken coal seams, the use of hydraulic slag discharge will cause the wall of the hole itself to collapse and increase the waste porosity. Therefore, drilling in soft and broken coal seams Wind slagging is usually used in the process of slagging, and although wind slagging can effectively reduce the waste porosity, it will promote the three necessary conditions for coal seam spontaneous combustion in the process of slagging, that is, the high temperature generated by the high-speed rotation of the drill bit, flammable and continuous ventilation and oxygen supply, thus seriously reducing the safety of mine production. For this, some existing drilling constructions have begun to try to use nitrogen as the slag discharge medium, and the nitrogen produced by the underground nitrogen production device in the coal mine is used to supply the drill pipe. The airflow formed by the nitrogen gas discharges the slag generated by the cutting of the drill bit from the hole, which can effectively reduce the probability of coal seam natural occurrence and improve the safety of mine production

[0003] However, the pressure value of nitrogen gas produced by the existing nitrogen generating device is relatively low, which cannot fully meet the needs of medium and long drilling holes, and pressure loss will occur during the transportation process, which further reduces the pressure value of nitrogen gas, correspondingly Reduce the effect of nitrogen slag removal during drilling. Secondly, due to the high dust content in the underground air, in order to ensure the purity and flow of nitrogen, the nitrogen generators in underground mines are usually equipped with air removal and filtering mechanisms. At the same time, in order to ensure The sufficiency and stability of the intake air volume of the nitrogen device will increase the replacement frequency of filter components accordingly. However, the existing filter component replacement process is generally carried out in a shutdown state, and the flexibility of replacement is low, which cannot be fully and timely. The nitrogen production process requires air filtration quality, and during the replacement interval, unfiltered air will directly enter the nitrogen production device, which will reduce the purity and flow of nitrogen accordingly

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