Double-cooling heat source heat pump low-temperature sludge drying system with waste heat recovery function and application method thereof

A waste heat recovery and heat source technology, applied in heat pump, refrigeration and liquefaction, dehydration/drying/thickened sludge treatment, etc., can solve the problems of increased sludge drying system cost, reduced dehumidification capacity, low energy utilization rate, etc., to achieve structural Novelty, save energy, reduce the effect of initial investment

Pending Publication Date: 2019-09-20
YANGZHOU UNIV +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] With the substantial increase in sewage treatment capacity, the amount of sludge produced has also increased significantly. Most of the sludge is simply dehydrated to 80% by belt filter presses or centrifuges, and then transported out for disposal. easy to cause secondary pollution
However, the existing sludge drying heat pump needs to cool and dehumidify the return air at the same time, resulting in a decrease in dehumidification capacity, and the temperature in the drying room is low in the initial stage of drying, and all the energy of the system come

Method used

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  • Double-cooling heat source heat pump low-temperature sludge drying system with waste heat recovery function and application method thereof
  • Double-cooling heat source heat pump low-temperature sludge drying system with waste heat recovery function and application method thereof
  • Double-cooling heat source heat pump low-temperature sludge drying system with waste heat recovery function and application method thereof

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with accompanying drawing:

[0027] Such as figure 1 As shown, a dual heat source dual cold source heat pump sludge drying system with waste heat recovery at low temperature, including the first refrigerant circuit, the second refrigerant circuit, the heat pipe circuit, the air circuit, the first sewage circuit and the second sewage circuit .

[0028] Such as figure 1 As shown, in the first refrigerant circuit, the refrigerant liquid absorbs the heat of the pre-cooled air 15 in the first evaporator 7 and becomes refrigerant vapor and enters the gas-liquid separator 8 to dehumidify the pre-cooled air 15, and the compressor 1 Continuously pump the refrigerant vapor in the gas-liquid separator 8, and compress it into a high-temperature and high-pressure gas and send it to the first condenser 2. The refrigerant vapor is cooled by the sewage water inlet 19 in the first condenser 2, and then Enter the second

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Abstract

The invention discloses a double-cooling heat source heat pump low-temperature sludge drying system with a waste heat recovery function and an application method thereof, and belongs to the technical field of sludge treatment equipment. The double-cooling heat source heat pump low-temperature sludge drying system comprises a first refrigerant circuit, a second refrigerant circuit, a heat pipe circuit, a first sewage circuit and a second sewage circuit. The structure is novel, operation principles are clear, sensible heat of return air is absorbed by a heat pipe exchanger, and dehumidified air is preheated; sewage of a sewage plant is used as a heat source to provide energy for a heat pump system; in an early stage of drying, the system operates under a temperature rise condition, and rapid and stable operation can be realized as the sewage serves as the heat source; in a later period of drying, the sewage of the sewage plant serves as a cold source to take away extra heat, and the system operates under a heat release condition; the sewage can take away the extra heat rapidly when serving as the cold source, so that energy can be saved, initial equipment investment can be reduced, and the cost of the sludge drying system can be further lowered.

Description

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Claims

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Application Information

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Owner YANGZHOU UNIV
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