Dead wind source heat pump shaft anti-freezing system based on heat pipe heat exchange

Abstract

The invention discloses a dead wind source heat pump shaft anti-freezing system based on heat pipe heat exchange. The dead wind source heat pump shaft anti-freezing system comprises a dead wind heat taking device, an initiative and passive combined air source heat pump unit with a heat pipe heat exchanger, a dead wind heat exchange defrost flushing device and a mine heating unit with a heat pipe heat exchanger. The dead wind heat taking device is connected in a coal mine dead wind pipeline in series so that waste heat in dead wind of coal mine can be utilized. A compressor, a condenser, an evaporator, an expansion valve and an oil separator are arranged in the air source heat pump unit for sufficiently absorbing heat from a dead wind heat exchange device, and a heat source is provided for the mine heating unit through the condenser. The dead wind heat exchange defrost flushing device is provided with a flushing pump, a settling pond, a middle water pool and a flushing water pool and is connected with the air source heat pump unit through a hot water heating pipeline. By means of the dead wind source heat pump shaft anti-freezing system based on heat pipe heat exchange, the heat pipe heat exchange technology is combined with the air source heat pump unit, the dead wind heat exchange technology and the shaft anti-freezing system, heat can be taken from dead wind of a coal mine reliably and is used for anti-freezing use of a shaft, and the running wind resistance is low.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to an anti-freezing system for shaft shafts of exhaust-air source heat pumps based on heat pipe heat exchange technology, which is mainly used for anti-freezing shaft shafts of coal mines. Background technique [0002] Heat pipe technology has been widely used in aerospace, military and other industries before, and heat pipes have such good thermal conductivity. Because the heat absorption and heat release of objects are relative, whenever there is a temperature difference, the phenomenon of heat transfer from high temperature to low temperature will inevitably occur. From the perspective of three ways of heat transfer (radiation, convection, conduction), convection conduction is the fastest. The heat pipe is a phase change process in which the medium evaporates at the hot end and then condenses at the cold end, that is, uses the latent heat of evaporation and latent heat of con...

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Problems solved by technology

[0003] There are two different technical routes in the existing mine exhaust air waste heat utilization technology. One is spray heat extraction. The spray heat extraction has a small heat gain, and a large amount of coal dust is easy to accumulate and block. After the air temperature is lower than 10 degrees, it is necessary to continuously add antifreeze and other defects. The other is the direct evaporative heat extraction method. Because the direct evaporative air is mixed with more dust, the exhaust air heat exchanger is easy to be blocked, etc. The problem is that the wind resistance of the exhaust air heat exchanger is relatively large. At the same time, the heat transfer area of ​​a single evaporator is small in the direct evaporative heat extraction. The heating efficiency of the source heat pump restricts the application and promotion of the direct evaporative exhaust air source heat pump

[0004] At the same time, both of the above two waste heat utilization technologies have a problem of low energy saving rate. In some places, coal saving is basically not energy saving. It only solves the problem of using clean energy, and the energy saving benefit is not obvious. Therefore, the market competitiveness is not strong. Problems such as difficulty in promotion

[0005] The existing mine shaft antifreeze mainly adopts mine heating units, which use steam heating coils or finned heat exchangers to directly heat fresh air, which consumes a lot of energy

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