On-line detection method for controlling station boiler combustion extinguishment

Abstract

An online detection method for controlling the extinguishing of a station boiler relates to a combustion technology, and is proposed according to the current situation of the flame extinction accidents caused by the discrepancy between coal property and the designed coal in the operation of the station boiler and imperiling the safe operation. The invention is characterized in that: (1) equipping a special-used online detection device and a computer software; (2) arranging all the sensors in the device in a wind and coal inlet of a combustion chamber, arranging a transmitting treatment system near the operating personnel for the automatic detection of a computer; (3) calibrating the ratio of the carbon content to the static electrical signal according to the laboratory result of the actual coal property when putting into operation for the first time; (4) observing the change of the coal power at any time, and comparing the data of the carbon content analysis of raw coal and adjusting the ratio between wind and coal and the supply air rate of the hot and cold wind timely according to a relation curve of the carbon content of coal power and the volatile component; (5) adjusting the static electrical signal comparison value at any time according to the change of the coal. The online detection method can fully meet the demand of monitoring the combustion extinguishment of the station boiler.

Description

technical field [0001] The invention relates to combustion technology, in particular to a detection method for preventing combustion and extinguishing fires of power station boilers. Background technique [0002] Sudden fire extinguishing during the operation of power plant boilers directly endangers the safe operation of the power plant. One of the important triggers is that the quality of coal used does not match the type of coal designed for the boiler, which brings blindness in operation management, and the changeable type of coal Another common problem that exists today. In order to solve the sudden fire extinguishing problem caused by the change of coal type, it is necessary to analyze and test the pulverized coal from time to time, and then adjust the coal delivery status according to the test results. Due to the traditional practice and until now, it takes a long time and cycle to conduct an analysis. It needs to go through the analysis procedure of sampling first, ...

AI Technical Summary

Problems solved by technology

Due to the traditional practice and up to now, it takes a long time and cycle to conduct an analysis. It needs to go through the analysis procedure of sampling, shrinking, re-sample, and finally testing. This process generally takes more than 4 hours. Therefore, the analysis results always arrive at the operator with a lag. During this period, the impact of the change of the medium on the combustion is still not adjusted in time, so that the combustion management of the raw coal is still in a blind state. Naturally, this leads to The fire extinguishing phenomenon will continue to exist

[0003] There is also a representative problem of sampling and testing. For power plants that use mixed coal types, the coal samples may not be representative. Even if the analysis is carried out, the error will be large for the actual coal combustion, and often It will cause false impressions when operators adjust and affect safe operation

[0004] In view of the above situation, the development of a device that can accurately and quickly detect the coal composition of the coal into the furnace can enable the operator to grasp the composition of the coal in real time and adjust the air-to-coal ratio, fuel injection, stable combustion, and hot and cold dampers. It is imperative to be aware of it in advance, so as to avoid unsafe accidents caused by changes in coal quality

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