Heat pump circulating system, drying system, and respective method

Abstract

The invention relates to a heat pump circulating system, a drying system, and a respective method. The heat pump circulating system comprises an absorption heat pump circulating subsystem composed of an absorber, an evaporimeter, a generator, and a condenser, a compressor, and a throttle valve, wherein a generating heat exchanger is arranged in the generator; a condensing heat exchanger is arranged in the condenser; the compressor, the generating heat exchanger, the throttle valve, and the condensing heat exchanger are connected in sequence to form a steam compressing type heat pump circulating subsystem. The drying system comprises the heat pump circulating system, a drying chamber, a heater, and a waste heat exchanger. The heat pump circulating system and the drying system provide driving heat sources for the generator of the absorption heat pump circulating subsystem through the electric driven steam compressing type heat pump circulating subsystem, and meanwhile, provide cold sources for the condenser, so that external driven heat sources and cold sources required by a conventional second kind absorption heat pump are not required, and the electric power can be effectively used to realize the promotion for the temperature quality of waste heat or of the temperature pressure of exhausted steam.

Description

technical field [0001] The invention relates to a heat pump cycle technology in the field of thermal energy engineering, in particular to a novel heat pump cycle system combined with an absorption heat pump cycle and a vapor compression heat pump cycle, a drying system and a method. Background technique [0002] The absorption heat pump cycle system uses the characteristic that the absorption solution can precipitate the vapor of the low boiling point component under certain conditions, and can strongly absorb the vapor of the low boiling point component under another condition to complete refrigeration or heat supply. The absorption cycle usually adopts a two-component absorption solution. It is customary to call the low-boiling point component as the working medium, and the high-boiling point component as the absorbent. water-lithium bromide working medium pair. The existing absorption heat pump cycle system mainly includes: a generator with a built-in heat exchanger, a c...

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Problems solved by technology

[0003] Absorption heat pumps include the first type of absorption heat pump for the purpose of increasing heat and the second type of absorption heat pump for the purpose of raising the heat temperature, that is, outputting high-temperature heat energy. The existing second type of absorption heat pump usually needs The external drive heat source is put into the heat exchanger, and at the same time, the cooling water, that is, the cold source is put into the condensing heat exchanger to operate, so that the scope of application is limited to a certain extent.

On the other hand, due to the limitation of the working pressure of the refrigerant, the vapor compression heat pump is usually unable to output high-temperature heat energy above 85°C, and its application has been greatly restricted.

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