Coal mine underground movable nitrogen making device and process thereof

Abstract

The invention provides a coal mine underground movable nitrogen making device and a process thereof, and belongs to the technical field of underground nitrogen making. The coal mine underground movable nitrogen making device comprises an air compression mechanism, a membrane separation nitrogen making mechanism and a scaling constraint assembly. According to the coal mine underground movable nitrogen-making device and the process thereof, air is filtered and compressed through the air compression mechanism to obtain high-pressure gas, then high-pressure nitrogen is prepared through the membrane separation nitrogen-making mechanism, the requirement of medium and long drill holes in the coal mine underground can be fully met, meanwhile, pressure loss in the nitrogen conveying process can be made up, the nitrogen deslagging effect in the drilling process is improved, the filter plate can be replaced under the non-stop state, the requirements for the air filtering quality and the air inlet amount in the nitrogen making process can be fully met in time, meanwhile, the problem that unfiltered air directly enters a nitrogen making device to affect the nitrogen purity and flow can be effectively solved, and the stability of the pressure value of the generated nitrogen and the purity and flow of the nitrogen are improved.

Description

technical field [0001] The invention relates to the technical field of underground nitrogen production, in particular to a coal mine underground mobile nitrogen production device and a process thereof. Background technique [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 con...

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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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