Heat supply unit combining compression heat pump with water heating device and heat supply method of heat supply unit

Abstract

The invention relates to a heat supply unit combining a compression heat pump with a water heating device and a heat supply method of the heat supply unit. The heat supply unit comprises a compression heat pump system, the water heating device, a circulating water inlet-outlet pipe and accessories, and a hot water supply water inlet-outlet pipe and accessories; steam exhaust circulating water of a steam turbine of a cooling power plant flows into the compression heat pump system, carries out primary heating on heat supply water of a heat supply network, and the heat supply water on which primary heating is carried out is heated to the heat supply temperature in the water heating device to flow into the heat supply network. The characteristics that the compression heat pump is high in energy efficiency and simple in structure and a heat supply peak time period overlaps with a power grid low load time period are utilized, waste heat of circulating water of the power plant is recycled by means of the compression heat pump driven by electric energy so that the heat supply base load can be guaranteed, the heat supply water is heated by electric power or steam or other energy sources through secondary heating so that the peak load can be guaranteed, and therefore the problems a thermal power plant generates electricity for a heat supply heavy load, wind power is surplus, and power generation is forced to be abandoned are solved, operation procedures and the structure are simplified, heat supply cost is reduced, and the effects of energy conservation and environment protection are achieved.

Description

technical field [0001] The invention relates to the field of energy, and discloses a compression heat pump driven by electric energy to recover the waste heat contained in the circulating water exhausted by cooling a steam turbine in a power plant, and further raise the temperature through a water heating device to meet the heat supply requirements. Combined heating units and heating methods thereof. Background technique [0002] The exhaust steam of the steam turbine in the power plant contains a large amount of heat. In order to establish the cold source of the thermal cycle of power generation, the heat must be transported to the cooling tower through the circulating water and discharged into the atmosphere, or discharged into the atmosphere through the air cooling device, which accounts for more than 30% of the input heat of the power plant. The low-grade waste heat is wasted. Taking the 330MW heating unit as an example, 126MW of heat can be recovered during the heating...

AI Technical Summary

Problems solved by technology

It combines two low-temperature heat sources, air source and solar energy, to heat hot water for heating. It cannot recover waste heat from power plants, and its structure is complex. It is only suitable for heating in small areas and is greatly affected by air temperature and sunlight. Therefore, it is limited more sexual

The above two existing technologies are not only complex in structure and operation, but also have limited heat recovery capacity, and do not take into account the use of abandoned wind power from wind power during winter heating periods to save energy

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