Heat pump coupling biological heat drying system and method

Abstract

The invention relates to a heat pump coupling biological heat drying system and a heat pump coupling biological heat drying method. A wet material is fed into a biological heat drying device and is subjected to hot air coupling biological heat drying so as to be discharged out of the device; normal temperature air enters a heating and condensing coupling device, is subjected to heat exchange and warming, and then enters the biological heat drying device so as to carry out coupling biological heat drying on a biomass; discharged saturated hot wet air enters an evaporation-condensation couplingheat exchange device so as to be subjected to heat exchange, condensation and cooling; condensate water enters a condensate water collecting device; and cooled cold air enters a bio-filter bed so as to be purified and is then discharged into air. According to the heat pump coupling biological heat drying system and the heat pump coupling biological heat drying method provided by the invention, a favorable biomass drying effect is achieved, and meanwhile, a heat pump system and an adsorption dehumidify system are heat-coupled, so that a conventional adsorption dehumidify system is saved, no extra moisture absorbent is required to be added, meanwhile, the problems that a closed system is low in dehumidifying efficiency and large in energy consumption and a non-closed system produces a malodorous gas to pollute environment due to organic matter volatilization are solved, the structure is simplified, the construction and operation cost is reduced, and the heat utilization efficiency is improved.

Description

technical field [0001] The invention relates to a heat pump coupled biological heat drying system and method, belonging to the technical field of solid waste treatment. Background technique [0002] Biomass energy is the solar energy fixed on the earth by photosynthesis of plants. Generally speaking, biomass energy mainly includes agricultural biomass resources, forestry biomass resources, industrial wastewater and urban solid waste. Biomass energy is renewable, widely distributed, and low-pollution. With the development of urban industry and the increase of population, the treatment of municipal waste and biomass waste is facing great challenges. Biomass energy is the fourth largest energy source in the world, after coal, oil and natural gas. Biomass energy conversion and utilization methods are mainly divided into biochemical methods and thermochemical methods. Biochemical methods mainly include utilization methods such as composting and fermentation; thermochemical met...

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Problems solved by technology

[0013] In view of the shortcomings of the prior art and economical considerations, the purpose of the present invention is to provide a heat pump coupling biological heat drying system and method, while achieving a good biomass drying effect, the heat pump system and the adsorption dehumidification system are thermally combined. Coupling, omitting the conventional adsorption dehumidification system, no need to add additional hygroscopic agents, and at the same time solve the problem of low dehumidification efficiency in the closed system and high energy consumption in the non-closed system. heat utilization efficiency

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