SU1402760A1 - Combination probe for checking slagging of boiler furnace - Google Patents

Abstract

The invention allows to increase the accuracy of control. A clean heat sink (TP) 1 is located above the pollution of the Limeps TP 2 and their ends 3 and 4 face the furnace and are located in the plane of the screen tubes 5. Heat is removed from the TP by air-cooled finned heat pipes 8 installed in the housing 12 with a gap, forming the air channel 13. Channel 13 is open at both ends in TP I, and its end facing the furnace forms a cooling air supply nozzle 14 to TP I. In TP 2, channel 13 through the air duct 16 is connected to nozzle 17, which is mainly directed parallel the plane of the pipe 5 on the torus n 3 TP 1. This allows washing of the end face 3 the air from both TA and create an air curtain along the pipe, whereby the end of the washing conditions 4 TA 2 fumes remain constant. 1 il. i (/: with

Description

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The invention relates to instrumentation engineering and can be applied in power engineering to monitor the condition of the heating surfaces of a boiler, namely, the slagging of their screens.

The purpose of the invention is to improve accuracy.

The drawing shows a combined probe for monitoring the slagging of the boiler screens.

The proposed probe contains a clean thermal receiver 1 and a polluted heat sink 2, the corresponding ends 3 and 4 of which are located in the shield 11 of the screen tubes 5. The net tenlon receiver 1 is installed at the loading radius 2 and is offset from it the movement of the smoke gases in the firebox, for zones of hot air, this corresponds to the location of the clean heat sink 1 over the contaminated one. 2. The distance between them depends on the Reed mode and design factors (gas velocity in the firebox, vacuum, Mtepbi heat receivers, etc.) and comp exhibits a 80-250 mm. Each heat-receiving device, except for Tfrts, contains a heat sink 6 with the thermocouples 7 installed in it, the opposite end of which is adjacent to the tee removal system from the heat sink. The heat removal system is made in the form of a thermal tube 8, partially filled with water 9. The heat pipe 8 is equipped with fins 10, a terminal- thermocouple 11 and is fitted with a gap into the body 12. The gap between the tag 8 and the body 12 forms an air duct 13, open at both ends in numerical T (iM heat source, and its end facing the furnace forms a nozzle 14 "supplying cooling air to clean heat. m HiJKy 1. Heat sink 6 is separated from air - Nfgo channel 13 with protective screens 15. In | the contamination of the heat pump system 13 air channel 13 through the air channel rob 16 is connected to the Soil 17 nanravleppomu pre- i.mushestvenno 1loskosti parallel furnace tubes 5 on the pure end 3 teplonriem- NMAI.

The control over the slagging of the furnace scills using the combined probe is carried out as follows.

Combined probe in the area of interest on the firebox. in the hatch. Due to the pressure difference in the furnace volume and outside the boiler, air flow 13 is organized through the air ducts 13, which, if necessary, can be controlled by spacers in the inlet section of the air ducts

gates. The passing air cools the heat pipes 8 equipped with fins 10 and through nozzles 14 and 17 enters the furnace volume. In this case, due to the air duct 16, the end 3 of the clean heat receiver 1 is washed with air from both tenlo acceptors, and the combined jet creates an air curtain along the screen pipes 5, as a result of which the end face 4 of the load does not change significantly heat collector 2. Heat supply due to heat exchange of heat receivers with a flare in the furnace and heat removal from the opposite end of the heat sink NIKOV to the cooling air using heat pipes 8

5 create in heat sinks 6 temperature differences, which are measured by thermocouples 7. Over time, on the washable flue gases of the end 4 of the contaminated heat sink 2, deposits may form, which leads to a decrease in the heat flow and differential gains from this heat sink. temperatures in the heat sink 6 of this heat sink: At the same time, the end 3 of the heat sink 1, which is protected by an air curtain, remains in operation5 but is clean and the temperature difference in its heat sink 6 depends only on the heat radiation torch in the furnace. Obtaining information on heat radiation from the furnace and change in heat flux due to slagging after signal processing in the collection, conversion and comparison system is used to optimize the operation of the boiler according to the conditions of slagging and cleaning devices.

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Claims (1)

Invention Formula The combined probe for monitoring the slagging of the boiler furnace screens, containing polluted and clean heat receivers, the ends are cut into the furnace and are located in the plane of the screen tubes, the heat removal system from the heat inlets in the form of air-cooled finned heat pipes, a nozzle of a supply of cooling air to a pure heat source. characterized in that for the purpose of leadership Accuracy, the heat removal system from the heat source of the heat receiver additionally contains an air duct with an outlet nozzle directed toward the end of the clean heat receiver along the movement of the flue gases, predominantly parallel to the plane of the screen tubes, and pure heat intake - the nickname is located above the polluted one.