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On-line fault diagnosis method and system of coal-fired power plant coal feeder

A technology for a coal-fired power plant and a diagnostic method, applied in general control systems, control/regulation systems, information technology support systems, etc., can solve problems such as inaccurate measurement, poor working conditions, and aging equipment, and achieve improved reliability, economical efficiency, etc. And the effect of safe operation guarantee

Active Publication Date: 2015-04-29
CHANGZHOU IND TECH RES INST OF ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor working conditions of the metering device of the coal feeder, it is easy to cause inaccurate metering due to failures such as equipment aging and loose speed probes, and the occurrence of this inaccurate metering is a gradual process, which will only occur when the cumulative deviation reaches a certain level. If it is detected by the operating personnel, failure to deal with the fault in time will affect the normal combustion control of the boiler, which will bring unfavorable factors to the safe and economical operation of the unit

Method used

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  • On-line fault diagnosis method and system of coal-fired power plant coal feeder
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  • On-line fault diagnosis method and system of coal-fired power plant coal feeder

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Embodiment 1

[0027] The present invention needs to read the material level information (coal height) of the raw coal bunker 2, the cumulative coal delivery amount of the designated raw coal bunker 2 through the coal feeding belt 1, and the cumulative coal feeding amount information of the coal feeder 3. These data can be stored in the power plant. Read from the production real-time database or access it through the factory-level monitoring system (sis), or connect to field devices, and then obtain the above data through calculation; the above data can be obtained through existing technologies, and will not be described here.

[0028] figure 1 A schematic diagram of the fuel delivery system involved in the power plant coal feeder of the present invention is shown.

[0029] Such as figure 1 As shown, a method for online fault diagnosis of a power plant coal feeder of the present invention includes: determining whether the coal feeder 3 fails by calculating the coal density in the raw coal b...

Embodiment 2

[0042] image 3 It shows the functional block diagram of the coal-fired power plant coal feeder fault online diagnosis system of the present invention.

[0043] Such as image 3 As shown, on the basis of embodiment 1, the present invention also provides a kind of power plant coal feeder 3 fault diagnosis system, comprising:

[0044] The fault diagnosis calculation unit is connected with the material level meter, the coal feeding belt 1 and the coal feeder 3, and judges whether the coal feeder 3 fails by calculating the coal density in the current raw coal bunker 2.

[0045] Specifically, the fault diagnosis calculation unit includes a data acquisition terminal, and the material level meter, the coal loading belt scale and the coal feeder 3 respectively enter the corresponding data collected into the fault diagnosis calculation unit through the data acquisition terminal, and the fault diagnosis The calculation unit also includes a processor module, through which the calculati...

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Abstract

The invention relates to an on-line fault diagnosis method and system of a coal-fired power plant coal feeder. The diagnosis method of the coal feeder includes the step of dynamically calculating the density of coal in a raw coal bunker so as to judge whether the coal feeder has a fault. The fault diagnosis method and system can be widely applied to monitoring fuel transport systems in thermal power plants. Especially, gradually changing measurement deviation of the coal feeder can be diagnosed, fault diagnosis of the coal feeder is achieved, and an alarm is given. In addition, by identifying the measurement deviation of the coal feeder, bases are provided for equipment management and maintenance personnel to carry out maintenance based on the equipment status, the reliability of power station auxiliary equipment is improved, and safe and economic operation of a unit is guaranteed.

Description

technical field [0001] The invention belongs to the field of coal-fired power generation production monitoring and equipment fault prediction and diagnosis, and in particular relates to a method and system for fault diagnosis of a coal feeder in a coal-fired power plant. Background technique [0002] In the fuel transportation system of coal-fired power plants, the raw coal needs to be weighed and measured by the coal belt scale before entering the raw coal bunker of a specific coal feeder. Among them, the coal feeder is the key equipment for measuring and controlling the quality of raw coal entering the boiler. Due to the harsh working conditions of the metering device of the coal feeder, it is easy to cause inaccurate metering due to failures such as equipment aging and loose speed probes, and the occurrence of this inaccurate metering is a gradual process, which will only occur when the cumulative deviation reaches a certain level. It is noticed by the operating personne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
CPCG05B23/0254Y04S10/52
Inventor 钟崴陈孝武吴燕玲周懿
Owner CHANGZHOU IND TECH RES INST OF ZHEJIANG UNIV