Ash-scraping waste-heat-recovering coal-saving device

Abstract

The invention relates o a recycling device for boiler smoking waste heat that includes box. The smoke mouth A and B are set on the up end and the down end. Snake shaped pipe bundle is installed on the box, and the two ends connect to A and B. The feature is that it has dust shaving device. Shaving board is covering on the pipe bundle, and the bolt is set on the box that could fix the board by nuts. The shaving board driving device contains dynamo. The driving wheel of the dynamo is connected to the driven wheel of the bolt. The invention has the advantages of simple structure, low cost, easy to maintain, good dust cleaning effect, high heat recovery efficiency, etc.

Description

technical field [0001] The invention relates to a boiler flue gas waste heat recovery device, which is an economizer for recovering waste heat from dust scraping. Background technique [0002] At present, in the boiler manufacturing technology, in order to use energy more efficiently, an economizer is generally installed in the tail flue of the boiler, and the purpose is to recover and utilize the heat of the flue gas. Among them, the serpentine tube economizer is a commonly used economizer. This economizer is connected to the boiler flue. The flue gas in the boiler flue washes the heated outer surface of the serpentine tube bundle, and the cooling water (boiler feed water) flows from the The lower header enters, flows upward through the serpentine tube bundle, and then flows out from the upper header, so as to realize the recovery of flue gas heat. In order to prevent the fly ash in the flue gas from depositing on the heated surface of the serpentine tube bundle and affect...

AI Technical Summary

Problems solved by technology

From the perspective of operation, these cleaning methods all have the disadvantage of poor cleaning effect and affecting heat recovery.

One of the reasons is that whether the high-speed airflow blows the heating surface of the serpentine tube bundle or the falling steel ball impacts the heating surface of the serpentine tube bundle, it is bound to be blocked, and the airflow velocity or impact velocity is reduced; the second reason is that no It is possible to arrange a soot blower for each row of heated tubes in the serpentine tube bundle, and the freely scattered steel balls cannot fill the entire flue section

In particular, these dust removal devices are designed under the condition that the flue gas has not yet condensed, and can only clean dry ash. Under the condition of flue gas condensation, the wet ash with strong cohesiveness will continue to adhere to the serpentine The heat-receiving surface of the tube bundle forms a heat-insulating layer, and none of the existing cleaning devices can remove the dust that has formed the heat-insulating layer

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