A biomass cogeneration operation method based on terminal electric heat pump mixed water heating

Abstract

The invention provides a biomass combined heat and power generation operating method based on terminal electric heating pump water mixing heat supply, and belongs to the technical field of biomass energy utilization. According to the method, system parameters of a biomass combined heat and power generation system are set according to set basic parameters, and the total dead steam amount of a steamturbine, the water flow of a terminal electric heating pump evaporator, the water flow of a condenser, the effluent temperature of the terminal electric heating pump evaporator, the effluent temperature on the low-temperature side of a smoke spraying water heat exchanger and the exhaust smoke temperature of a chimney are kept unchanged; the hot water temperature and the return water temperature supplied to a user heat exchanger are estimated; the effluent temperature and the actual performance coefficient of the condenser of a terminal electric heating pump are determined, and the terminal electric heating pump is adjusted; the dead steam pressure on a high-temperature side inlet of a dead steam heat exchanger is calculated, and the dead steam pressure of the steam turbine is adjusted; and the heat supply amount of the dead steam heat exchanger is calculated, the dead steam amounts entering the dead steam heat exchanger and the high-temperature side of a steam condenser are adjusted,and therefore cooling water circulation is controlled. By means of the method, biomass power plant waste heat can be utilized to the maximum degree.

Description

technical field [0001] The invention proposes a biomass heat and power cogeneration operation method based on a terminal electric heat pump for heat supply by mixing water, which belongs to the technical field of biomass energy utilization. Background technique [0002] As an important part of renewable energy, biomass is of great significance for ensuring energy security and reducing greenhouse gas carbon emissions. In 2017, there were 747 biomass power generation projects in my country, with a cumulative installed capacity of 14.762 million kW, and about 22 million tons of coal-fired power generation substitutes. According to statistics, my country's biomass power generation has the potential to replace coal-fired coal with a potential of 460 million tons of standard coal per year. Material power generation has broad prospects for development. [0003] However, at present, due to the constraints of uneven distribution of biomass resources and the radius of raw material col...

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Problems solved by technology

[0005] In addition, the operation method of the traditional biomass power plant only adjusts its heat supply by adjusting the amount of steam extraction, which cannot realize the control of the amount of waste heat recovery, and is not suitable for the biomass cogeneration system of flue gas and waste steam waste heat recovery.

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