The control method of the single steam pump tripped electric pump and the uncut heat supply of the 600mw supercritical condensate extraction power generation heating unit
A technology of heating unit and control method, which is applied in the direction of control system, steam generation, lighting and heating equipment, etc., can solve the problems of bad economy and society, affect the output and influence of the unit, achieve good social and economic benefits, improve The effect of reliability
Inactive Publication Date: 2015-12-09
FUJIAN HONGSHAN THERMOELECTRICITY
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Problems solved by technology
[0003] As mentioned above, the supercritical power generation and heating unit needs to provide heat for heat users at all times, and the electric heating load is high. When an important auxiliary machine fails, it will affect the output of the unit, especially in the single-unit heating mode, the heat load of the whole plant It is only supplied by one unit. When a single steam pump trips in the heating unit, the unit RB action will reduce the load to 300MW and cut off the heat supply at the same time, which will cause an accident of interruption of external heat supply for the whole plant, which will seriously affect the The production and operation of surrounding enterprises have caused adverse economic and social impacts
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[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] The invention provides a control method for a 600MW supercritical condensate extraction power generation heating unit with a single steam pump tripped and electric pumps connected to start the heat supply without cutting off. The effect of heat supply can avoid the occurrence of accidents of interruption of external heat supply, which greatly improves the reliability of external heat supply of power plants.
[0034] The pre-requisites are as follows:
[0035] 1. Analog control systems, such as unit coordination control system, combustion control system, water supply control system, negative pressure control system, air volume control system, temperature control system and other auxiliary control systems, have been put into normal use, and have undergone corresponding determination. Value disturbance and load change tests, the ...
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The invention discloses a control method for a 600MW supercritical extraction condensing generating heat supply unit to realize no heat supply cutoff through combined starting of an electric pump after a single steam pump trips out. According to the control method disclosed by the invention, after the single steam pump of the generating heat supply unit trips out, running equipment, such as the steam pump, the electric pump, a steam turbine regulating valve and a coal pulverizing system, respectively and correctly operate; the feed water flow is stabilized to be 1400t / h, the electrical load of the unit is stabilized to be 473MW, and the supplied heat flow is stabilized to be 481t / h, and all parameters tend to be stable, so that the effects less load and even no load of the unit is reduced and the heat supply is not cut off after the single steam pump trips out is realized; the accident that the external heat supply of a power plant is interrupted is avoided; the reliability of the external heat supply of the power plant is greatly improved; a powerful guarantee is provided for local surrounding industrial heat users; the control method has good social benefits and economic benefits.
Description
technical field [0001] The invention belongs to the technical field of thermoelectricity, and in particular relates to a control method for a 600MW supercritical condensate extraction power generation heating unit with a single steam pump tripped and an electric pump connected to start uncut heat supply. Background technique [0002] The existing supercritical thermal power generation heating unit unit is mainly composed of boilers, steam turbines, coal mills, blowers, induced draft fans, primary fans, air preheaters, and feed water pump sets. The feed water pump sets of this unit are equipped with two 50 % capacity of the steam-driven feed water pump is used for regular operation, and an electric speed-adjustable feed water pump with a capacity of 30% BMCR is used as a backup pump when the unit starts and the steam-driven feed water pump fails. It burns fuel in the boiler to heat the feed water to generate superheated steam, which enters the steam turbine, drives the turbin...
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IPC IPC(8): F22B35/00
Inventor 熊大健连晖章凯陈键李秉正李树荣
Owner FUJIAN HONGSHAN THERMOELECTRICITY