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Slurry circulating pump RB control method of thermal power generating unit

A slurry circulating pump and control method technology, applied in the direction of electrical program control, comprehensive factory control, comprehensive factory control, etc., can solve the problems of different processing time, imperfect interlocking protection logic of slurry circulating pump, different accident spraying effects, etc. , to achieve the effect of stable operation

Active Publication Date: 2014-09-03
STATE GRID CORP OF CHINA +1
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Problems solved by technology

However, the reason for the tripping of the slurry circulating pump is different, and the processing time is different. The cooling effect of accident spraying alone is not obvious; the transmission reliability of the desulfurization side signal and the host signal is not high; Uncertain within safe operating range
[0004] In addition, the interlock protection logic of the slurry circulation pump is not perfect, such as the low liquid level of the absorption tower can be canceled

Method used

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  • Slurry circulating pump RB control method of thermal power generating unit
  • Slurry circulating pump RB control method of thermal power generating unit
  • Slurry circulating pump RB control method of thermal power generating unit

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Embodiment Construction

[0029] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0030] The technical terms appearing in the text are explained separately below.

[0031] Furnace Negative Pressure: The furnace negative pressure is a parameter reflecting the pressure in the furnace. There are two ways to express pressure: one is called absolute pressure (also known as real pressure), which is the pressure value obtained from absolute vacuum as the starting point of measurement. The other is called relative pressure, which is the pressure value obtained by measuring the local atmospheric pressure as the...

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Abstract

The invention discloses a slurry circulating pump RB control method of a thermal power generating unit. in allusion to abnormal flue-gas temperature rising of a boiler, during shutdown of all or part of slurry circulating pumps, the slurry circulating pumps RB are triggered and a spray system is started so as to realize matching control among unit coordinated control, accident spray commissioning and the slurry circulating pumps. By the slurry circulating pump RB mode, unit load is reduced while all accident sprays are all put into operation, and flue-gas temperature can fall to a safe range.

Description

technical field [0001] The invention relates to a method for controlling a slurry circulating pump RB of a thermal power unit. Background technique [0002] The desulfurization system (FGD) designed in the early stage of my country's large thermal power plants is equipped with bypass flue and bypass flue gas baffle, the purpose is to ensure the safe operation of the boiler flue gas system and the convenience of unit start-up. When the desulfurization system fails, the flue gas is discharged directly from the bypass flue into the chimney by opening the bypass flue gas baffle to ensure the stable operation of the boiler flue gas system. According to the requirements of environmental protection, the flue gas desulfurization bypass baffle door of the thermal power unit needs to be removed, and all thermal power units need to block the desulfurization flue gas system bypass baffle. After the desulfurization bypass baffle is blocked, it is necessary to maintain the safe and stabl...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 罗志浩戴航丹吴永存陈波尹峰金冯梁张永军舒畅赵琦
Owner STATE GRID CORP OF CHINA
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