Heat storage peak shaving system

Abstract

The invention provides a heat storage peak shaving system. The heat storage peak shaving system comprises a generator set, a heater, a deaerator, a water storage tank, a condenser, a condensate pump and a booster pump. The condensate pump is connected to the heater to form a water supply adjusting pipeline of the heat storage peak shaving system. The heater is connected to the deaerator. The watersupply adjusting pipeline is provided with a first valve set and a first flow monitoring device. The heater is connected to a steam turbine generator set. A hot water pipeline of the heat storage peak shaving system is formed between the water storage tank and the deaerator. The water storage tank is connected with the booster pump to form a heat release branch line of the hot water pipeline. Theheat release branch line is further connected with a heat storage branch line in parallel. The heat release branch line and the heat storage branch line are gathered to a hot water pipeline main line. The hot water pipeline main line is provided with a second valve set and a second flow monitoring device and finally connected to a deaerator main line. The condensate pump is connected to the waterstorage tank to form a cold water pipeline of the heat storage peak shaving system. The heat storage peak shaving system further comprises a third valve set. The condensate pump, the condenser and the water storage tank communicate with one another through the third valve set.

Description

technical field [0001] The invention designs the field of thermal power generation technology peak regulation, specifically a heat storage peak regulation system. Background technique [0002] In order to meet the needs of the rapid development of renewable energy and improve the capacity of renewable energy consumption, it is urgent to further enhance the flexibility of the power grid. Among them, the flexibility of load adjustment includes: deep peak shaving (low load operation of boiler and steam turbine), rapid start and stop of units, ramp rate of units, and thermoelectric decoupling of combined heat and power units. [0003] At present, the rapid adjustment of the power generation of the unit mainly uses the steam inlet valve of the steam turbine to release the heat storage capacity of the boiler in the short term; the condensate throttling optimization method changes the condensate flow through the heater in a short time. [0004] Although the use of boiler heat stor...

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Problems solved by technology

[0004] Although the use of boiler heat storage capacity can quickly respond to dispatching instructions, the heat storage capacity is limited, which can only increase the output of the unit in the short term, and cause large fluctuations in the main steam pressure

The optimization method of condensate throttling reduces the flow rate of the condensate regulating valve and relies on the self-balancing ability of the low-pressure heater of the unit to increase the output power of the steam turbine. However, when the condensate flow rate is greatly changed, the water level of the deaerator and the water level of the condenser Both will be greatly disturbed, changing the condensate flow rate for a long time will affect the safe operation of the unit, and the continuous capacity cannot be guaranteed

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