Distribution control method for automatic balancing pressures in mother pipes of boilers run parallelly

A technology of parent pipe pressure and automatic balance, applied in the field of boiler control, can solve the problems of threatening the operation safety of boilers and steam equipment, unstable pressure, large fluctuations, etc., and achieve the effect of automatic operation, stable operation and convenient operation

Inactive Publication Date: 2007-12-26
周振华 +1
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Problems solved by technology

[0002] At present, the automatic adjustment of the main pipe (steam) pressure of boilers running in parallel is a difficult problem in the automation industry. It cannot be solved in actual production and can only be adjusted manually. Therefore, the pressure is very unstable, espec

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  • Distribution control method for automatic balancing pressures in mother pipes of boilers run parallelly

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Embodiment

[0033] Shunde Jinfang Group thermal power station in Shunde District, Foshan, has four 35T / h coal-fired boilers, one 6MW condensing unit, one 6MW back pressure unit, one 3MW back pressure unit, two 3MW condensing units , external power supply and steam supply, controlled by the method of the present invention, in this system, main pipe pressure=6MPa, #1 main steam flow rate=40T / h, #2 main steam flow rate=60T / h, #3 main steam flow rate =50T / h #5 Main steam flow = 100T / h, pressure setting = 3.58MPa, pressure correction PI: P = 35 I = 600, flow correction coefficient = 1.0. In actual operation, due to the automatic adjustment of the load distribution system with the change of load, the stability of the main pipe pressure is significantly improved compared with the conventional control method, and the load change of each boiler is also greatly improved than before. of stability.

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Abstract

This invention discloses an automatic balance and distribution method for pressure of master pipes of parallel operating boilers, which collects and computes volumes of steam equipment and output volume after PID adjustment according to the pressure of a master pipe then sends them to a boiler load distributing module to distribute them to the boilers in terms of a rule, which control burning according to the distributed flow and control the actual flow equal to the distributed ones, when the steam volume or the pressure of a master pipe is changed, the load distributed to the boiler is changed and the actual one is changed too so as to stabilize pressure of master piles and realize automatic adjustment.

Description

technical field [0001] The invention relates to a boiler control technology, in particular to a control method for automatically balancing and distributing the pressure of main tubes of boilers operating in parallel. Background technique [0002] At present, the automatic adjustment of the main pipe (steam) pressure of boilers running in parallel is a difficult problem in the automation industry. It cannot be solved in actual production and can only be adjusted manually. Therefore, the pressure is very unstable, especially in thermal power plants with large load changes. Larger fluctuations seriously threaten the operation safety of boilers and steam-consuming equipment (steam turbines or other equipment), and at the same time cause the thermal efficiency of steam-consuming equipment to decrease. For this reason, the applicant of the present invention has invented a unique method for automatically adjusting the header pipe pressure of boilers operating in parallel, solved th...

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Application Information

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IPC IPC(8): F22B35/18
Inventor 周振华陈雁
Owner 周振华
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