Sprinkling open type absorption heat pump system capable of recycling waste heat of airflow containing moisture

Abstract

The invention relates to a sprinkling open type absorption heat pump system capable of recycling the waste heat of the airflow containing moisture. The sprinkling open type absorption heat pump system capable of recycling the waste heat of the airflow containing moisture comprises an absorber, a generator, a condenser, a solution-water heat exchanger, a sprinkling device and a drive heat source. A flue gas inlet and a flue gas outlet are formed in the side surfaces of the absorber respectively. The sprinkling device is arranged above the flue gas inlet and located in the absorber. A dilute solution outlet formed in the bottom of the absorber is connected with a dilute solution inlet formed in the generator. A concentrated solution outlet formed in the generator is connected with a solution channel of the solution-water heat exchanger and the sprinkling device in sequence. One side of the generator is connected with the drive heat source. A steam outlet is formed in the top of the generator. The condenser is connected with the steam outlet of the generator. A water channel of the solution-water heat exchanger and a heat exchange tube of the condenser are communicated with cold water and a heat consumer installation respectively. According to the sprinkling open type absorption heat pump capable of recycling the waste heat of the airflow containing moisture, the high-temperature airflow containing moisture is made to enter the generator to be in direct contact with an atomization working medium sprinkled by the sprinkling device, so that heat and mass transfer is conducted; in this way, the heat exchanger coefficient is high, heat and water steam in the airflow containing moisture can be effectively recycled during heat exchange, the influence of the dew point of the airflow is avoided, the temperature of the airflow containing the humidity is greatly lowered, and the airflow containing the humidity is discharged out of the absorber.

Description

technical field [0001] The invention relates to a heat pump system, in particular to a spray-type open-type absorption heat pump system for recovering the waste heat of the wet gas flow. Background technique [0002] Most of the current steelmaking, ironmaking, metallurgical and chemical production processes can produce high-grade moist gas streams. For example, after the flue gas of a coal-fired power plant is desulfurized, the volume of water vapor accounts for about 10% of the total flue gas emissions. The main component of the natural gas used in the gas-fired boiler room is methane (CH4), and the water vapor volume component in the flue gas discharged after combustion is close to 20%; Simply discharging the water vapor and latent heat of vaporization into the atmosphere will not only increase the operating cost, but also form white smoke, which will cause acid corrosion of the chimney or the environment. Taking a gas boiler room as an example, one cubic meter of natura...

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Problems solved by technology

When the invention patent process is the second type of absorption heat pump, the temperature of the absorber is the highest temperature of the system, and the membrane heat and mass transfer method cannot reduce the temperature of the wet air flow to a low enough temperature to discharge the absorber, so the recovered latent heat is limited. It is also not applicable to the situation where the temperature of the wet air flow is low; when the inventive process is the first type of absorption heat pump, the absorption efficiency cannot be optimized; whether the absorber structure is internally cooled or adiabatic, the structural complexity is increased. The processing is difficult, and the heat transfer coefficient of the membrane heat transfer is low, and the absorber requires a large heat transfer area, so the use is limited; the heating return water only recovers the heat released by the absorber flue gas, and the heat released by the condenser adopts low temperature The cold source is recycled, so the system needs to provide a low-temperature cold source, and the low-grade heat energy has not been applied

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