Novel combustion device with nozzle slagging prevention function

Abstract

The invention relates to a novel combustion device with a nozzle slagging prevention function. The novel combustion device comprises an air powder channel, an air powder nozzle which is formed by a middle nozzle and peripheral high-speed air nozzles, and a limiting adhesive tape which is acted by high-temperature resistant thermal insulation cotton. The peripheral high-speed air nozzles are arranged at the periphery of the middle nozzle and are supplied with air by a boiler bellows, so that a high-speed airflow ring with functions of blocking ash and slag in a boiler and avoiding slagging at the middle nozzle can be formed at the periphery of the middle nozzle, smooth supply of air and powder airflow and the combustion stability of the boiler are ensured, and the operation of the boiler isnot restricted by coal types. The heat-resistant thermal insulation cotton which is not prone to slag sticking is adopted to replace a traditional refractory casting material which is prone to slag sticking and caking, so that thermal insulation and the normal working life of the air powder nozzle are ensured, at the same time the slagging phenomenon on the surface near the air powder nozzle is also avoided, the unimpeded channeling of combustion flue gas in the boiler is facilitated, the occurrence probabilities of coking on the boiler wall, and abrasion or corrosion of the heated surface are reduced, the workload and cost of daily shutdown maintenance are reduced, the boiler operation is not restricted by the coal types, and the practicability is very high.

Description

technical field [0001] The invention relates to the technical field of boiler combustion components, in particular to a novel combustion device which has the function of preventing slagging at the spout and helps to reduce the requirements of the boiler for selecting coal-fired varieties. Background technique [0002] Based on the distribution status of my country's coal resources, product differences and mining and transportation conditions, it is impossible for many boilers to be limited to a specific type of coal as the main fuel. However, as far as boilers with current structural forms are concerned, the effects of different coal types on the environment are quite different. Low-quality coal with low thermal efficiency, difficult ignition and poor combustion stability is used as the main fuel. Inferior coal is easy to produce molten ash during the combustion process, which is easy to stick to the burner nozzle and the furnace wall, resulting in blockage of the nozzle, p...

AI Technical Summary

Problems solved by technology

However, as far as boilers with current structural forms are concerned, the effects of different coal types on the environment are quite different. Use low-quality coal with low thermal efficiency, difficult ignition and poor combustion stability as the main fuel

Inferior coal is easy to produce molten ash during the combustion process, which is easy to stick to the burner nozzle and the furnace wall, resulting in blockage of the nozzle, poor flow of pulverized coal, affecting the combustion stability of the boiler, and also causing water cooling in the furnace. Coking on the wall, wear or corrosion on the heating surface of the furnace wall, etc. affect the operation safety, work stability and normal working life of the boiler, resulting in a high daily shutdown rate of the boiler, heavy maintenance workload and high cost, and affecting the production of power companies. and economic benefits, so from the perspective of economy and practicality, it is not ideal

Therefore, the uncertainty of different application effects caused by different coal combustion on boilers has led to many troubles that boilers cannot be used at will, and enterprises cannot purchase coal types at will, which has become a major problem that plagues the industry at present.

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