Anti-blocking device for boiler air preheater

By using the flow guide assembly, scraper plate, electric heating wire and scraper assembly in the air preheater, the problems of reducing flue gas temperature and ash blockage are solved, and the effective heating of the preheating pipe temperature and improving the flue gas flow efficiency are achieved.

CN119642215APending Publication Date: 2025-03-18STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD SKILL TRAINING CENTER
1 Cites 1 Cited by

Patent Information

Application Number
CN202411972945.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

When the flue gas flows downward, the temperature decreases, resulting in a difficult heat increase in the lower part of the preheating pipe, which is easily blocked and corroded by ash, affecting the flue gas flow efficiency.

Method used

An anti-blocking device for boiler air preheater is designed, including a flow guide assembly, a scraper plate, an electric heating wire and a scraper assembly. The dust is scraped away by heating the electric heating wire and the scraper plate, ensuring that the temperature of the preheating pipe is higher than the dew point of water vapor and acid gas, and preventing blockage.

Benefits of technology

It effectively increases the temperature at the lower part of the preheating pipe, prevents dust from being blocked and corroded, and improves the efficiency of flue gas flow.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the technical field of anti-blocking of air preheaters, in particular to an anti-blocking device for a boiler air preheater, which comprises an air preheater and an air outlet hopper fixedly connected to the circumference of the bottom of the air preheater, and an air inlet hopper is fixedly connected to the top of the air preheater along the circumference. Preheating pipes are evenly and fixedly connected between the top and the bottom of the air preheater in a penetrating mode at intervals, a transverse plate is fixedly connected to the inner side of the air preheater, and the preheating pipes fixedly penetrate through the transverse plate. When flue gas is discharged into the preheating pipe, an electric heating wire is started, then an electric lead screw is started to rotate forwards and backwards alternately to drive an n-shaped plate to move up and down, the n-shaped plate drives a scraping plate to move up and down, and the scraping plate drives the electric heating wire to move up and down to heat the lower portion of the preheating pipe, so that the temperature of the preheating pipe is higher than the dew point of water vapor and acid gas in the flue gas; and meanwhile, dust attached to the outer wall of the preheating pipe is scraped away through a scraping plate, blockage caused by dust attached to the inner wall of the preheating pipe can be prevented through the heating effect of a spiral scraping plate and an electric heating wire, and therefore the smoke flowing efficiency is improved.
Need to check novelty before this filing date? Find Prior Art