Energy-saving system for multi-heat-source industry heating of thermal power plant and intelligent control method of energy-saving system

Abstract

The invention discloses an energy-saving system for multi-heat-source industry heating of a thermal power plant and an intelligent control method of the energy-saving system. The energy-saving systemis characterized by comprising a boiler, a turbine high-pressure cylinder, a turbine intermediate-pressure cylinder, a turbine low-pressure cylinder, a rotation partition plate, an h-grade regenerative heater, a k-grade regenerative heater, a j-grade regenerative heater, a first heat exchanger, a second heat exchanger, a third heat exchanger, a pressure matcher, a deaerator, a water feed pump, a temperature reducing and pressure reducing device and a steam user. By means of the energy-saving system for multi-heat-source industry heating of the thermal power plant and the intelligent control method of the energy-saving system, the superheat degree of heating steam can be sufficiently recycled, the energy efficiency of the system is improved, power capability losses of a regenerative systemare reduced, the control method for industry heating is further optimized based on the principle that the power capability losses are minimum and the irreversible losses are minimum, and therefore itis ensured that a heating unit can run with the maximum efficiency during full-working-condition running.

Description

technical field [0001] The invention belongs to the technical field of cogeneration of heat and power, and in particular relates to an energy-saving system and an intelligent control method for industrial heat supply with multiple heat sources in thermal power plants, and is especially suitable for thermal power plants for industrial heat supply. Background technique [0002] At present, my country's policies are gradually emphasizing the promotion of new energy sources and reducing the proportion of thermal power units, which makes the development of thermal power units face severe challenges. At present, for the thermal power plants that have realized industrial extraction and central heating in the early stage in my country, due to the simple and extensive heating technology and serious energy loss, the comprehensive energy utilization efficiency of thermal power plants cannot be further improved, and many thermal power plants that have already provided industrial heating ...

AI Technical Summary

Problems solved by technology

Among them, Patent 1 has relatively large limitations. One is that the superheat of the steam is not recycled, and the other is that it simply solves the negative impact of a single extraction steam port when the unit is in variable load operation, but it does not provide how to optimize the operation of the port. , can not really solve the problem of high energy consumption

As for Patent 2, not only its application range is different, but also its technology has certain limitations. First, when the unit is under high load, its normal industrial steam extraction port is the medium pressure cylinder exhaust steam, while the normal industrial steam extraction port of the present invention is the medium pressure cylinder exhaust steam. The steam extraction port in the middle of the pressure cylinder shows that the parameters of the heating unit used in it are higher than that of the heating unit involved in the present invention; the second is that the superheat of the steam is not fully recycled, and the temperature parameters of the high and low pressure steam of the hot press It is not adjustable and cannot increase the ejection coefficient of the heat press, so there are certain limitations in improving energy efficiency

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