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Piping-main scheme boiler load coordinating control method

A technology of coordinated control and boiler load, applied in control systems, steam generation, lighting and heating equipment, etc., can solve problems such as unstable pressure of the main pipe, eliminate mutual interference of loads, improve safety and stability, and improve thermal efficiency. Effect

Active Publication Date: 2011-02-02
哈尔滨中远控制工程有限公司
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Problems solved by technology

[0011] The purpose of the present invention is to solve the problem of unstable main pipe pressure caused by the manual adjustment of existing main pipe boilers, and to provide a load coordination control method for main pipe boilers

Method used

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  • Piping-main scheme boiler load coordinating control method

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specific Embodiment approach 1

[0028] Embodiment 1: The DCS used in this embodiment is based on the existing DCS of each boiler, and a main pipe pressure load coordination control DCS is added, and the pressure load coordination control DCS of the main pipe is connected with each boiler. DCS connection, the pressure load of the main pipe is coordinated to control the working process of DCS as follows:

[0029] Step 1: Obtain the control modes of all boilers on the main steam main pipe according to the control modes sent by the DCS of each boiler, and adjust the control mode of each boiler, and then send the adjusted control mode to the DCS of each boiler; then Execute step two;

[0030] Step 2: Calculate the external total load demand increment ΔSP_Dz according to the deviation epm=SPm-Pm between the main pipe pressure set value SPm and the actual value Pm, and then perform step 3;

[0031] Step 3: Calculate the incremental load distribution coefficient of each boiler alfa[i]=(Dq_h[i]-Dq_l[i]) / ∑(Dq_h[i]-Dq...

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Abstract

The invention discloses a load coordination control method for a header system boiler, relating to the load coordination control method for boilers at power station. The invention solves problem of unstable vapor pressure in a main vapor pipe of the header system operation boiler adjusted by manpower currently and realizes an automatic adjustment of pressure of the main pipe. The pressure load ofthe main pipe in the system adjusts control mode of each boiler in coordination with DCS; then according to overall load demand of the system, load given value of each boiler is adjusted by incrementand sent to the DCS of each boiler of the system; the adjustment method of the load given value of each boiler is that: when load difference of each boiler of the system is over big and the load needs increasing, the load given value of the boiler with minimum load needs increasing; when the load needs decreasing, the load given value of the boiler with maximum load needs decreasing and the givenvalue is fixed. The load coordination control method for the header system boiler has the advantages of being able to effectively control fluctuation of the pressure of the main pipe within + / -0.1MPa.

Description

technical field [0001] The invention relates to a load control method of a boiler in a power station, in particular to a load coordination control method of a parent tube boiler. Background technique [0002] The operation mode of the main pipe boiler refers to the operation mode in which multiple boilers operate in parallel and supply steam to the same steam main pipe at the same time to meet the load demand of power generation and heating network. The parent control operation mode has the advantages of flexible unit configuration, convenient scheduling, small investment, quick results and high reliability. And central heating and other industries are widely used. In the prior art, when the main tube boiler is running, a boiler is usually set up to adjust the steam pressure in the main tube (hereinafter referred to as "main tube pressure"). This boiler is also called "pressure regulating boiler", and the operating boiler is Pressure regulating boiler, other boilers with r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B35/18
Inventor 柴庆宣
Owner 哈尔滨中远控制工程有限公司
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