Low-pressure steam source boosting heat supply device of combined heat and power generation unit

Abstract

The invention discloses a low-pressure steam source boosting heat supply device of a combined heat and power generation unit. The low-pressure steam source boosting heat supply device of the combinedheat and power generation unit comprises a steam turbine assembly, a heating module, a detection module and a reheating module. Low-pressure steam is lifted into high-pressure steam through the steamturbine assembly, so that the requirements of heat users of different pressure grades are met, and the unit has the outward long-distance heat supply capacity due to rising of the pressure of heat supply steam; and the heating module, the detection module and the reheating module are designed, an electric heater can be adopted for heating when the heat supply steam temperature is low, water is sprayed to reduce the temperature when the temperature is high, and the steam temperature is adjusted in a large range.

Description

technical field [0001] The invention relates to the technical field of heat supply and power generation and its control analysis, in particular to a low-pressure steam source step-up heat supply device for a heat and power cogeneration unit. Background technique [0002] At present, it is proposed to optimize the industrial and energy structure, reduce the consumption of scattered coal and fuel oil; strengthen the reduction of major pollutants, accelerate the development of cogeneration and centralized heating, and use the existing cogeneration units and pure condensing power generation around cities and industrial parks. A series of requirements such as the implementation of heat supply transformation for units and low-grade waste heat, and the elimination of coal-fired boilers (kilns) within the scope of heat supply and gas supply. [0003] In response to the requirements of the national energy conservation and environmental protection policy, small industrial boilers have...

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Problems solved by technology

The steam flow rate of the steam turbine is directly related to the output of the generator. If the steam flow rate of the steam turbine is large, the output power of the generator will be large, and if the steam flow rate of the steam turbine is small, the output power of the generator will be small; The power of the unit is large; the heat supply flow is small, and the power of the generator set is required to be small; under the heating condition of the cogeneration unit, the electric power of the generator unit cannot be flexibly adjusted to meet the requirements of peak regulation and valley filling of the power grid; the pure condensing steam turbine is used for large-area thermal power generation. After the co-generation transformation, the peak-shaving unit and capacity will be greatly reduced. The large-scale promotion of clean energy such as large-capacity nuclear power units with base loads and intermittent wind and photovoltaic power generation forms will significantly increase the impact on the power grid. To the safe and stable operation of the power grid

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