Method solving air preheater dust clogging problem and intelligent online flushing system

An air preheater and flushing system technology, which is used in flushing, cleaning heat transfer devices, lighting and heating equipment, etc., can solve the problems of the flushing range of the flushing device being limited by height, the shutdown of the flushing process, and affecting the production efficiency. The effect of reduced energy consumption, increased flushing efficiency, and reduced fume loss

Active Publication Date: 2015-10-21
HUNAN DATANG XIANYI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for removing the clogging of the air preheater and an intelligent online flushing system to solve the tec

Method used

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  • Method solving air preheater dust clogging problem and intelligent online flushing system
  • Method solving air preheater dust clogging problem and intelligent online flushing system
  • Method solving air preheater dust clogging problem and intelligent online flushing system

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Embodiment 1

[0059] When the operating pressure difference on the flue gas side of the air preheater reaches 1.2-1.3 times the design pressure, the flushing device is manually activated through the upper computer system and the electric control cabinet, and the driving motor of the flushing device drives the flushing gun barrel to extend to the air preheater The distance between the nozzle of the flushing nozzle and the surface to be flushed is 200mm, aiming at the air preheater partition for flushing, the pressure of the water flow at the flushing nozzle is 70Mpa, and the water volume is 60L / min.

[0060] The 1# furnace and 2# furnace of a power plant are 350MW subcritical coal-fired boilers, and the air preheater is a rotary type. The effect of flushing is shown in the table below:

[0061]

[0062] From the data in the above table, before flushing, the pressure difference on the flue gas side of the A side of the 1# furnace and the B side of the 2# furnace is relatively high, and the...

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Abstract

The invention provides a method solving air preheater dust clogging problems and an intelligent online flushing system; a washing device of the system penetrates a flue gas wall on a flue gas side of the air preheater; a washing gun of the washing device is arranged on a flue gas exit side of the rotary air preheater, i.e., on the bottom of the air preheater, and a nozzle faces upwards; when a heat storage element of the rotary air preheater on a heat-engine plant coal dust boiler flue path is blocked, and import and export operation differential pressure on the glue gas side reaches 1.2-1.3 times of a designed pressure, the high pressure washing system is started, high pressure water is sprayed out from the nozzle of the washing gun of the washing device, and high pressure jet is sprayed out to wash the heat storage element from the bottom of rotating air preheater to an upper side. The high pressure small flow washing mode can fast wash off the ash deposit from the air preheater, thus greatly reducing ventilation resistance of a flue gas heat exchanger, reducing air leak rate, improving heat exchange efficiency of the air preheater, and greatly reducing boiler energy consumption.

Description

technical field [0001] The invention relates to the technical field of dust washing equipment, in particular, to a method for solving dust blocking of an air preheater and an intelligent online washing system. Background technique [0002] The air pre-heater is a heating surface that preheats the air before entering the boiler to a certain temperature through the internal cooling fins, which is used to improve the heat exchange performance of the boiler and reduce energy consumption. Usually, the air preheater of the boiler used for power generation in the power plant is located at the tail of the boiler (where the flue gas and metal temperature are the lowest), and the heat transfer element of the air preheater is usually severely clogged with dust. This could be due to fouling from the acid, or a condition where the cold end of the air preheater is too close to the water dew point, caused by dew point condensation. Modification of selective catalytic reduction conversion ...

Claims

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Application Information

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IPC IPC(8): F28G9/00
Inventor 聂勤俭王银河李启云尹晓峰
Owner HUNAN DATANG XIANYI TECH CO LTD
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