Waste heat and electricity composite drive temperature increasing type heat pump circulation system

Abstract

The invention discloses a waste heat and electricity compound drive temperature increasing type heat pump system and relates to the technical field of low-temperature industrial waste heat utilization. An ammonia water mixture serves as a working medium of the system, low-temperature smoke serves as a heat source, and waste heat and electricity are used for preparing industrial vapor. Low-temperature industrial waste heat is used for driving a rectifying tower to produce low-pressure ammonia vapor, meanwhile, high-pressure ammonia liquid evaporation is completed, electricity input externally is used for increasing the pressure of the low-pressure vapor and an ammonia water dilute solution, finally, the high-pressure ammonia vapor and the dilute solution complete the absorption process in an absorber, and released heat is used for preparing the industrial vapor. By means of the waste heat and electricity composite drive temperature increasing type heat pump circulation system, discharge smoke waste heat which cannot be utilized by a waste heat boiler is utilized, the beneficial effects that the wastes heat utilization efficiency is high and the temperature increasing amplitude is large are achieved, industrial vapor with the pressure being 0.5 MPa or above can be prepared, and the low-temperature waste heat utilization range is enlarged. Meanwhile, compared with an existing absorption compression type heat pump, a compressor and pump composite compression manner is adopted, compression power consumption is reduced, and the temperature increasing range of the temperature increasing type heat pump is enlarged.

Description

technical field [0001] The invention relates to the technical field of absorption and compression heating-up heat pumps, in particular to a heating-up heat pump circulation system which uses ammonia water as a working medium and is driven by waste heat and electricity. Background technique [0002] The soaring oil prices and energy consumption brought about by industrialization have attracted widespread attention around the world. Efficient use of waste heat and development of new energy have become a top priority. In addition to the development of new energy sources and more efficient energy systems, new technologies for utilizing waste heat also need to be developed. my country's industrial energy consumption accounts for more than 70% of the total energy consumption, and more than 50% of the energy is converted into industrial waste heat. The medium-high temperature industrial waste heat can be used by the low-temperature process after the high-temperature process through...

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Problems solved by technology

[0003] At present, there are mainly two types of heat pumps: absorption type and compression type. The vapor compression type system is the most widely used, but it uses high-grade electric energy to produce heat energy, and its energy efficiency is relatively low. When the temperature increase is required, the vapor pressure increases. Multi-stage compression is required, and the temperature range that conventional absorption heat pumps can raise is limited

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