Slag inhibitor adding nozzle for boiler

Abstract

The invention discloses a slag inhibitor adding nozzle for a boiler. The slag inhibitor adding nozzle comprises a swingable slag inhibitor nozzle and a slag inhibitor nozzle air duct, wherein the swingable slag inhibitor nozzle is connected with the slag inhibitor nozzle air duct through a nozzle swing pin shaft; a two-stage slag inhibitor concentration guide plate is arranged at the front end of the swingable slag inhibitor nozzle; one end of a nozzle swing connecting rod mechanism is connected with the swingable slag inhibitor nozzle, and the other end of the nozzle swing connecting rod mechanism penetrates out of the slag inhibitor nozzle air duct and then is connected with a nozzle swing angle adjusting handle; a nozzle swing angle indicator and a pin shaft fixing disk are arranged on the nozzle swing angle adjusting handle; and a vertical swing angle of the nozzle is adjusted through the nozzle swing angle adjusting handle and is fixed by penetrating a fixing pin into the pin shaft fixing disk. According to the slag inhibitor adding nozzle for the boiler, the high-temperature and high-speed hot air flow serves as a conveying medium of a slag inhibitor, parameters, the structure and the material of a slag prevention air nozzle are reasonably designed, and the slag inhibitor is sprayed to the position near a water cooling wall in a targeted manner, so that adjustment is flexible, convenient, safe and reliable, the utilization efficiency of the slag inhibitor is improved, the operation cost is reduced, and slag bonding control over the water cooling wall is achieved.

Description

technical field [0001] The invention belongs to the technical field of pulverized coal boiler combustion, and in particular relates to a boiler antislagging agent adding nozzle, which is suitable for boilers burning easy slagging coal. Background technique [0002] There are many types of slagging-prone coals with large reserves, such as Shenhua coal, Zhundong high-alkali coal and Jingbei coal are all slagging-prone coals. Slagging of the water wall is prone to occur when the boiler burns coals that are prone to slagging or improper operation adjustments. Slagging will reduce the heat transfer efficiency of the water wall, and the accumulated slagging may damage the cold ash hopper and seriously affect the operation of the boiler. safety and economy. [0003] At present, some coal-fired power plants have carried out the application test of adding aluminum-based anti-slagging agent to the boiler, showing that the anti-slagging agent can change the characteristics of coal ash...

AI Technical Summary

Problems solved by technology

The easy-to-slagging coal ash in the middle of the furnace will not cause slagging on the water-cooled wall, only the easy-to-sludge coal ash near the water-cooled wall will continue to stick to the water-cooled wall, so it is inevitable to add anti-slagging agent to the coal belt As a result, a large amount of anti-slag agent entering the middle of the furnace with coal powder cannot play the role of preventing slagging of the water wall, resulting in a large amount of waste of anti-slag agent

However, the anti-slagging effect of spraying anti-slagging agent through the furnace fire viewing hole is directly related to the position and quantity of the fire viewing hole, and requires a lot of manpower and manual operation, which cannot be operated continuously and reliably.

[0004] Aiming at the problems of high cost and low utilization efficiency of anti-slag agent, there is an urgent need for an anti-slag agent adding device that can directly act on the water wall, is highly targeted, can be adjusted flexibly, and is safe and reliable.

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