Yearly Archive 2023-03-03

The ventilation in the mine needs a lot, and the ventilation temperature can basically be maintained for more than 20 years, and the air temperature of the mine return air will increase with the increase of the depth. Therefore, the mine return air contains huge low-temperature heat energy. From the perspective of return air shaft, the temperature of mine return air is much higher than that of inlet air. In addition, the return air volume of the mine is large. Therefore, there is a large amount of low-temperature heat energy in the return air of the mine. This part of heat energy is not used, but directly discharged into the atmosphere, which will cause huge waste of heat energy.
If the mine return air is used as a low temperature heat source, separate heat pipe and gravity technology can be used to convert it into a useful high temperature heat source to meet the anti-freezing effect of the borehole, and the effect is very good. The heat pipe steam generator technology is used in the mine site of the same work in and out of the well. It can be used to recover the residual heat of the return air in the mine and achieve the antifreezing effect of the shaft
The hot air directly transfers heat to the cold air through the evaporation section wall and the condensation section wall of the heat pipe, thus avoiding the heat loss caused by the heat transfer of the ordinary heat exchanger through the third heat exchange medium, and improving the heat exchange efficiency; Since the evaporation part and the condensation part are separated, it is possible to avoid manufacturing long conveying pipes
Compared with the traditional heat pipe heat exchanger, the steam of the separated heat pipe flows in the same direction from the top to the bottom of the liquid film in the condensing section, which avoids the single-tube long portable limit heat pipe heat exchanger. Therefore, under the same heat transfer conditions, the tube with smaller diameter can be selected as the heat transfer tube to ensure the compactness of the device
The cold and hot fluids are completely isolated, and the area of the condensation surface or the evaporation surface can be greatly changed to adjust the heat flux density, so as to adjust the temperature of the heat pipe wall to ensure that it is higher than the low temperature dew point fluid, thus preventing corrosive gases, and the dew point corrosion can ensure the long-term operation of the equipment; The structure design and position arrangement are simple and flexible, and it is easy to realize the mixed distribution of forward and reverse flow. At the same time, multiple condensing sections can be set and used in parallel with them.

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