Combined heat and power generation peak regulation system based on steam supply and heat supply coupling and load regulation method

Abstract

The invention discloses a combined heat and power generation peak regulation system based on steam supply and heat supply coupling and a load regulation method. The system mainly comprises a combined heat and power generation unit, a condenser, industrial steam users, back pressure machines, power generators, steam type electrode boilers, a steam-water mixed heating device, a drainage buffer device, circulating water pumps, a heating user, a steam-water heat exchanger, a water-water heat exchanger, a hot water heat storage device and a power grid. Steam complementary energy is recycled for power generation through the back pressure machines, low-pressure steam is formed to be supplied to low-pressure steam users to be used, steam and steam drainage are used for supplying heat to the heating user, the hot water heat storage device is used for carrying out electric peak regulation on the combined heat and power generation unit and the power grid, and the steam type electrode boilers are used for cooperating with the combined heat and power generation system for flexible regulation. According to the combined heat and power generation system, through efficient integration of steam supply and heat supply of combined heat and power generation, the diversified and multi-grade heat utilization requirements of the users are met, gradient efficient utilization of energy is achieved, the power peak regulation capacity of the combined heat and power generation system is excavated in combination with the heat storage device, and the market application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of combined heat and power generation, and in particular relates to a combined heat and power generation peak-shaving system and a load regulation method based on steam supply coupling heating, and is especially suitable for a combined heat and power generation system that requires both steam supply and heating. Background technique [0002] At present, in order to improve the comprehensive energy utilization efficiency of thermal power units and strive for more utilization hours of power generation, the conversion of pure condensing units to heat supply has been widely developed. However, for different industrial steam users, due to their different processes, the required steam pressure parameters are also different. For thermal power units, there is only one main pipeline for external steam supply, that is, only one external steam supply can be provided. Pressure parameter of steam. As a result, the steam...

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Problems solved by technology

However, for different industrial steam users, due to their different processes, the required steam pressure parameters are also different. For thermal power units, there is only one main pipeline for external steam supply, that is, only one external steam supply can be provided. steam pressure parameter

As a result, the steam supply parameters of the thermal power unit do not match with the steam users, which not only cannot guarantee the steam demand of steam users, but also causes energy loss to a certain extent

In particular, the current rapid development of new energy power has more and more stringent requirements on the peak-shaving capability of thermal power units. The needs of the country's energy transition at this stage

[0003] In addition, in recent years, with the promotion of energy conservation and emission reduction in industrial parks and the rapid development of central heating, the high-pollution and low-energy-efficiency heating boilers in the original industrial parks have been gradually shut down and replaced by cogeneration centralized heating. However, the energy requirements for steam users and heating users are different. Generally speaking, for heating users, a hot water pipe network is laid, and for steam users, a steam pipe network is laid, resulting in a huge investment in pipe network construction.

[0004] To sum up the technical problems faced by the market, the main technical solutions are: the Chinese patent "High and Low Pressure Two-Stage Industrial Steam Extraction and Heating Device for Steam Turbine" with the application number 201310667813.1. However, the disadvantage is that two steam main pipelines need to be laid, which greatly increases the investment cost; especially, every time a steam pressure parameter requirement is increased, the same problem is faced

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