Sewage (wastewater) water source heat pump and valley electricity energy storage type district heating system

Abstract

The invention discloses a sewage (wastewater) water source heat pump and valley electricity energy storage type district heating system. A sewage (wastewater) gravity pipeline is connected with a sewage (wastewater) regulating reservoir; a sewage (wastewater) automatic water taking device is connected with a sewage (wastewater) outlet pipe; the sewage (wastewater) outlet pipe is connected with a blocking prevention sewage heat exchanger; one side of the blocking prevention sewage heat exchanger is connected with an intermediate water pipe; an intermediate water circulating pump is arranged on the intermediate water pipe; the intermediate water pipe is also connected with a temperature increasing device; one side of the temperature increasing device is connected with a system water pipe; a valley electricity energy storage device and a heating system water circulating pump are arranged on the system water pipe; and the system water pipe is connected with heating users. The sewage (wastewater) water source heat pump and valley electricity energy storage type district heating system disclosed by the invention has the beneficial effects that three operations modes of independent heating of the heat pump, independent heating of the valley electricity energy storage device and combined heating of the heat pump and the valley electricity energy storage device can be realized by opening and closing a waterway switching valve, and peak load shaving of power resources is realized.

Description

technical field [0001] The invention relates to a heat supply system, in particular to a heat supply system combining a water source heat pump and valley electricity energy storage. Background technique [0002] The technology of using heat pumps to recover low-grade thermal energy resources in sewage (waste) water to provide heat and cold sources for building heating, air conditioning and domestic hot water systems is gradually being accepted by the industry. However, due to the hourly change of water temperature and water volume during the sewage (waste) discharge process, the operation of the heat pump heating system is unstable. The water supply temperature of the condenser is low (≤50°C), which is difficult to apply in the district heating and cooling system. On the other hand, judging from my country's current power consumption structure, the peak-to-valley power difference tends to increase year by year. The country has issued corresponding preferential policies to e...

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Problems solved by technology

However, due to the hourly change of water temperature and water volume during the discharge of sewage (waste) water, the operation of the heat pump heating system is unstable. However, the conventional water source heat pump systems currently on the market are limited by the temperature of the low-temperature heat source and the exhaust pressure ratio, resulting in The water supply temperature of the condenser is low (≤50°C), which is difficult to apply in the district heating and cooling system

On the other hand, judging from my country's current electricity consumption structure, the peak-to-valley power difference tends to increase year by year. The country has issued corresponding preferential policies to encourage social electricity consumption to "cut peaks and fill valleys". The gap between peak power supply and demand has promoted the optimal allocation of power resources; however, there are still many key technical problems to be solved in order to realize the "peak shifting and valley filling" of power resources

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