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Method for Improving Load Response Rate of Generating Units in Medium-Speed ​​Coal Pulverization System

A technology for generating sets and machine powder, applied in grain processing and other directions, can solve the problems of slow boiler load response rate, affecting the grid load response rate of the generator set, and difficulty in reaching the grid load response rate, etc. effect of speed

Active Publication Date: 2022-05-24
国投云顶湄洲湾电力有限公司
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Problems solved by technology

But for medium-speed pulverizing system boilers, the pulverized coal fuel command acts on the coal feeder, and the coal feeder feeds the coal into the coal pulverizer to be ground into pulverized coal, which is then dried by hot primary air and carried into the coal pulverizer on the top of the coal pulverizer. The rotary separator at the outlet, after the coarse and fine coal powder is separated by the rotary separator at the outlet of the coal mill, the coarse coal powder returns to the coal mill for secondary grinding and the fine coal enters the furnace through the pulverized coal pipeline. The above process takes time and requires In 3-5 minutes, the timeliness of pulverized coal entering the furnace directly leads to the slow boiler load response rate, which affects the power grid load response rate of the generator set, making it difficult to meet the requirements of the grid load response rate

Method used

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  • Method for Improving Load Response Rate of Generating Units in Medium-Speed ​​Coal Pulverization System
  • Method for Improving Load Response Rate of Generating Units in Medium-Speed ​​Coal Pulverization System

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Embodiment Construction

[0022] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] The present invention is a method for improving the response load rate of a generator set of a medium-speed coal mill pulverization system, comprising the following steps:

[0024] S1. Assuming that the grid load demand is Q1 at time T1, and the demand at time T2 is Q2, the DCS of the medium-speed pulverized coal pulverizing system responds to the grid load demand and releases the boiler combustion chamber load Z. At this time, the boiler of the medium-speed pulverizing pulverization system burns The chamber needs to rise from Z1 at time T1 to Z2 at time T2, and the boiler load change rate is (Z2-Z1) / (T2-T1). Corresponding to the amount of coal fed X, the calculation formula is as follows:

[0025] X(Z)=a*(kZ+i) +b[(Z2-Z1) / (T2-T1)]

[0026] k, i are fitting constants, determined by experiments, a is the correction coefficient of the ...

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Abstract

The invention relates to a method for improving the response load rate of a generating set of a medium-speed pulverized coal pulverization system. According to the load (active power) demand of the power grid, the DCS of the medium-speed coal pulverization system pre-controls the working status of the coal feeder, grinding roller, rotary separator, and primary air regulating valve, thereby increasing the boiler load of the medium-speed pulverization system Response rate, improve the rate at which the generating set responds to the load demand of the grid.

Description

technical field [0001] The invention relates to a method for improving the response load rate of a generator set of a medium-speed coal mill pulverizing system. Background technique [0002] At present, the electricity demand of market users changes very fast, especially the start and stop of large electrical equipment, which has a great impact on the power grid. In order to meet the user's electricity demand in time and maintain the stability of the grid frequency, the grid-connected generator set is required. Has a faster load response rate. In thermal power plants, in order to improve the grid load response rate of the steam turbine unit, the main method is to improve the response speed of the boiler load. Saturated steam volume to improve boiler load response rate. [0003] The response speed of the boiler load is mainly affected by the air volume and the coal volume. The air supply volume (oxygen volume) used for boiler combustion is directly sent into the furnace to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C25/00B02C21/00
CPCB02C25/00B02C21/00
Inventor 唐安虎方凯旋
Owner 国投云顶湄洲湾电力有限公司
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