Study on local temperature controlling technology and equipment in heat disaster coal well
Abstract
Along with continuous increasing of coal resources mining depth, high temperature and heat disaster is becoming more and more serious. In that case, the health of workers under coal well is threated at any time. Coal resources safe mining is impacted seriously. In order to eliminate coal well heat disaster, scholars at home and abroad have inputted a lot of time and energy. They researched controlling theory of coal well heat disaster. They developed cooling equipment of high temperature. They have achieved some results. But the equipment is too large in which result, it is hard to move. The power of the equipment is high. So, it cost large amount of electric power. The maintenance cost is huge that the coal could not afford. In a word, application effect is not ideal.
Based on this, the article analyzed the influence factors of coal well heat disaster firstly. Then, the calculation method of cooling load in coal well was researched. The author put forward the technology of local high temperature controlling. ZLS-90 movable cooling equipment was developed successfully which includes refrigeration compressor, evaporator, water cooling condenser and expansion valve etc. The property of compressor plays an important part in cooling effect of whole system. After comparing, we choose GEA bock compressor. Enthalpy difference comprehensive testing system was used to test the performance of the equipment. Test results show that all performance index comply with the designing requirements. The property is also stable.
The paper also proposed discharging heat with heat-rod to deal with the heat of condensation as well as using the heat synthetically. By means of local temperature controlling technology and equipment, we can carry out effective cooling. In that case, the working environment under coal well would be guaranteed, safety production of coal well would be guaranteed. It would realize efficiency, conservation and environmental protection of resource.References
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