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Parameter-variable supercritical unit warming method

A supercritical unit and variable parameter technology, applied in the direction of machines/engines, mechanical equipment, steam engine installations, etc., can solve the problems of prolonging the warm-up time at medium speed, low metal temperature of steam turbine cylinder block and rotor, economic loss, etc. The effect of controlling start-up time, saving fuel consumption, and shortening start-up time

Inactive Publication Date: 2013-11-13
YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST +1
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Problems solved by technology

[0005] Because the high-speed warm-up effect of the unit is not satisfactory, and the metal temperature of the cylinder block and rotor of the steam turbine is low, the plant cannot extend the medium-speed warm-up time to 260 minutes
As a result, the boiler consumes a large amount of fuel, and at the same time causes a large amount of heat source loss and economic loss

Method used

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  • Parameter-variable supercritical unit warming method
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  • Parameter-variable supercritical unit warming method

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Embodiment Construction

[0014] In the cold start-up operation of supercritical thermal power units, rationally adjust the boiler combustion and slip parameters to drain and warm the main and reheat steam pipes, so that the steam turbines have the start-up conditions in advance, and the steam parameters reach the main steam 3.0MPa-4.0MPa / 360 ℃-370℃: reheat steam: 0.1MPa-0.3MPa / 320℃-330℃; during high-speed warm-up period, the steam parameters gradually change to: main steam 6.0MPa-7.0MPa / 380℃-390℃: reheat steam :0.7MPa-0.9MPa / 355℃-365℃.

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Abstract

A parameter-variable supercritical unit warming method is characterized in that in a supercritical unit jointly started by a high-pressure cylinder and a medium-pressure cylinder, the parameters of a turbine are 3.0MPa / 360 DEG C in main steam and 0.1MPa / 320 DEG C in reheating steam; and in a high-speed warming period, the parameters are gradually changed to be 6.0MPa / 390 DEG C in main steam and 0.7MPa / 355 DEG C in the reheating steam. The parameter-variable supercritical unit warming method can improve the warming effect of the supercritical unit turbine, and enables each security monitoring parameter of the unit to be more easy to control, thus shortening the starting time of the unit and saving the fuel consumption in the starting process of the unit.

Description

technical field [0001] The invention belongs to the field of thermal power plants, and is a method capable of shortening the warm-up time of a supercritical thermal power unit, improving the warm-up effect, and making various safety monitoring parameters easier to control. Background technique [0002] With the increasing scale of the power system and the increasing national requirements for energy saving and emission reduction of thermal power generating units, the economical and environmentally friendly operation of the unit is becoming more and more important. Reasonable control of the starting and warming parameters of the unit and the selection of an appropriate steam temperature rise rate As well as the metal temperature rise rate of the steam turbine, it can not only shorten the warm-up time of the unit, improve the warm-up effect, save fuel costs, but also is very necessary for the life management of the rotor and the safe operation of the steam turbine. [0003] For...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K13/02F01K7/32
Inventor 李富云严正波李燕勇沈永庆赵明董川杨辰曜范文武
Owner YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST
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