A kind of anti-clogging dust air volume control method and operation monitoring device of air preheater

Abstract

The invention provides an air preheater anti-blocking dust air volume control method and an operation monitoring device. The air preheater anti-blocking dust air volume control method adjusts and controls the anti-blocking dust air volume by changing the amount of dust carried by the anti-blocking gray air. The anti-blocking ash operation monitoring device includes a first sampling pipe, a second sampling pipe, a first sampling control valve, a second sampling control valve, a dust concentration analysis chamber, a dust concentration measuring instrument and an anti-blocking ash air flow transmission device. The anti-clogging dust air volume control method of the present invention provides a direct basis for the regulation of the anti-clogging dust air volume of the air preheater, determines the most suitable air volume, improves the economical operation of the air preheater anti-clogging dust system, and ensures the anti-clogging dust effect ;The anti-blocking ash operation monitoring device has a simple structure and is easy to control. It is more intuitive to adjust the anti-blocking ash air volume through the amount of dust carried by the anti-blocking ash wind; the installation structure of the anti-blocking ash operation monitoring device for the air preheater is simple. Easy to operate, easy to transform, strong practicability, easy to promote.

Description

technical field [0001] The invention relates to an anti-clogging dust air volume control method and an operation monitoring device of an air preheater, belonging to the technical field of operation optimization of an air preheater of a power station boiler. Background technique [0002] Rotary air preheater (referred to as "air preheater") is a heat exchange equipment used in large-scale power plant boilers. It uses the heat of boiler flue gas to heat the air required for combustion to improve the efficiency of the boiler. . After passing through the air preheater, the flue gas temperature is generally cooled from 300-400°C to 100-150°C, and the corresponding air temperature is generally heated from 0-50°C to 280-380°C. [0003] The air preheater utilizes the continuous rotation of the rotor loaded with heat storage elements to realize continuous heat absorption on the air side and continuous heat release on the flue gas side. According to the needs of the boiler fuel syste...

AI Technical Summary

Problems solved by technology

In engineering applications, the anti-blocking gray air enters the inlet of the anti-blocking ash bin from the cold end of the air preheater, and carries the above-mentioned dust adhering to the heat storage element to flow out from the outlet of the anti-blocking ash bin. The existing anti-blocking ash air volume adjustment is lacking Direct basis, although parameters such as the ash pollution coefficient of the heat storage element and the resistance of the air preheater can be monitored online, the sensitivity and accuracy are not enough for real-time adjustment of the anti-blocking ash air volume, and cannot adapt to the operation of the boiler and auxiliary system Changes in working conditions

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