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Coal burning control method for direct-blown thermal power unit

A thermal power unit and control method technology, applied in the direction of electrical program control, sequence/logic controller program control, etc., can solve the problem of low calorific value of mixed combustion, improve load variable capacity, reduce fuel cost, and change load The effect of ability improvement

Active Publication Date: 2016-02-24
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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Problems solved by technology

[0011] The above studies on the coordinated control system of thermal power units mainly focus on the main control of the boiler and the main control of the steam turbine in the coordinated control. situation, there is no effective means of controlling

Method used

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Embodiment Construction

[0025] The present invention is a kind of direct blowing type thermal power unit coal type co-firing control method, the present invention comprises the following steps:

[0026] 1. Detect and classify the purchased coal, and put the coal with the same characteristics together;

[0027] Coal with the same characteristics refers to coal with the same type and similar calorific value. For example, the types of coal include: lignite, bituminous coal, anthracite, semi-anthracite, lampblack coal, etc. The low calorific value of bituminous coal is 19677KJ / kg, 21227KJ / kg, 22190KJ / kg, etc. The low calorific value of lignite is 12560KJ / kg , 13397KJ / kg, 14653KJ / kg, etc., with a difference of 300KJ / kg in the low calorific value, it can be considered that the calorific value is similar.

[0028] two. Control the type of coal that enters a single coal mill to ensure that the coal that enters a single coal mill is the coal with the same characteristics;

[0029] The method adopts the met...

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Abstract

The invention belongs to the technical field of automatic control of a thermal power plant, in particular to a control method of coal mixed combustion of a direct blowing thermal power generating unit, which can be used for the automatic control of the direct blowing thermal power generating unit when different coals are combusted. When the coal mixed combustion of the thermal power generating unit is realized, the rapidity requirement of automatic generation control (AGC) of a power grid can be satisfied, the safety and stability of primary control parameters can be realized, and the adaptive capacity of the unit to the quality variation of coals is improved. By using the control method, after the coal mixed combustion of the direct blowing thermal power generating unit is realized, the variable load capacity of the unit is improved, and the primary operating parameters of the unit are stabilized by controlling a single coal grinding mill. The control method has the obvious advantages that the variable load capacity of the unit is improved, the AGC requirement of power grid dispatch is satisfied, the stability of the primary operating parameters of the unit is enhanced, the coal adaptability of the unit is increased, and the coal cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of automatic control of thermal power plants, and in particular relates to a method for controlling coal mixed combustion of a direct blowing thermal power unit. It can be used for automatic control when direct blowing thermal power units burn different types of coal at the same time. When the thermal power unit is mixed with coal, it can not only meet the rapidity requirements of the automatic generation control (AGC) of the power grid, but also realize the safety and stability of the main control parameters, and improve the adaptability of the unit to the change of coal quality. Background technique [0002] In recent years, as the price of thermal coal continues to rise, the contradiction between coal and electricity has become increasingly prominent. In order to reduce fuel costs and turn around losses and increase profits, many power plants have begun to mix and burn a large number of non-design coal ty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/04
Inventor 姚远管庆相揭其良王洪凯
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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