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Method for carrying out real-time furnace monitoring for pulverized-coal boiler-superheater reheater

A real-time monitoring, pulverized coal boiler technology, applied in the direction of boiler working status indication, etc., can solve the problem that the flue gas side in the furnace cannot be accurately reflected.

Inactive Publication Date: 2012-01-11
SHANGHAI WANGTE ENERGY RESOURCE SICENCE & TECH
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AI Technical Summary

Problems solved by technology

However, using the ratio of the steam enthalpy increase at the inlet and outlet of the tubes of these different screens to their average steam enthalpy increase to define the thermal deviation coefficient of the screen cannot accurately reflect the situation on the flue gas side of the furnace

Method used

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Embodiment Construction

[0007] According to the basic principle of boiler heat transfer, the invention decomposes the steam enthalpy increase deviation coefficient in the pipe into the heat absorption non-uniformity (deviation) coefficient of the flue gas side pipe and the flow non-uniformity (deviation) coefficient of the steam side in the pipe. The enthalpy increase of the steam in each tube can be obtained from the temperature and pressure of the inlet and outlet of the tube, and the ratio of the enthalpy increase of the steam in the same tube number to the average enthalpy increase of the steam in these tubes is the thermal deviation coefficient of each tube; The steam flow deviation coefficient of each screen along the furnace width can be obtained through the static pressure distribution of the inlet and outlet headers of the tube group and the resistance characteristics of the tube group (see "Standards for Hydrodynamic Calculation of Power Plant Boilers"); each tube corresponds to the tube pane...

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Abstract

The invention relates to a method for carrying out real-time furnace monitoring for a pulverized-coal boiler-superheater reheater, which is the method for accurately extrapolating furnace smoke-gas heat-discharging nonuniformly-quantified indexes through an external inlet-outlet steam-temperature measured value outside the superheater reheater. The method comprises the following steps of: firstly obtaining the steam-flow deviation coefficients of pipe screens along the width of a furnace through the structure and the parameter of the superheater reheater; then computing the steam enthalpy-increasing deviation coefficients among all the screens along the width of the furnace through temperature-measuring points installed outside the furnace; multiplying the two coefficients of the same pipe screen to obtain the smoke-gas heat-discharging deviation coefficient of the screen along the direction of the width of the furnace, wherein the smoke-gas heat-discharging deviation coefficient represents the nonuniform degree of the smoke-gas heat-discharging strength along the width of the furnace; and displaying the heat-discharging strength situations of smoke gas along with the difference of working conditions in the furnace to provide important references for the burning adjustment of a boiler.

Description

technical field [0001] The invention relates to a method for real-time monitoring of a superheater reheater of a pulverized coal boiler in a furnace, which is applied to a pulverized coal boiler equipped with a superheater reheater system and relates to the fields of energy and power. Background technique [0002] The superheater reheater system of the pulverized coal boiler has the worst heating conditions in the steam-water system of the boiler. The temperature of the flue gas side is around 1000°C, the temperature of the steam must reach 400-600°C, and the steam pressure must reach hundreds of atmospheres. , so the heat resistance and strength requirements of this part of the steel are very high. Since the heating surface of this part is generally at the outlet of the furnace, the tube group is composed of several tube panels, and each tube panel is composed of many tubes. The inlet and outlet of the tubes are respectively connected to the inlet header and the outlet head...

Claims

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Application Information

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IPC IPC(8): F22B37/38
Inventor 王孟浩陆方王衡
Owner SHANGHAI WANGTE ENERGY RESOURCE SICENCE & TECH
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