Double-cyclone cylinder burner W-shaped flame boiler capable of stably burning pulverized coal

Abstract

The invention discloses a double-cyclone cylinder burner W-shaped flame boiler capable of stably burning pulverized coal. The boiler consists of a lower hearth (1), an upper hearth (2), a front-rear arch (3) and a front-rear wall water cooling wall (4); the lower part of the front-rear wall water cooling wall (4) is provided with a secondary air nozzle; the front-rear arch (3) is provided with a primary air nozzle (6), a gas exhaust nozzle (7) and a secondary air C nozzle (5); and the air outlet of the secondary air C nozzle (5) and the vertical direction form an included angle of 1-10 degrees. According to the invention, the secondary air C nozzle and the vertical direction form a fixed included angle and form a group of closely parallel air stream with the primary air, thus the interferences of the secondary air at the C nozzle to the main pulverized coal air stream of the primary air can be reduced, the burning stability is improved, also the secondary air entering from the secondary air C nozzle also can supply air in the course of burning of the main pulverized coal air stream under the tilting angle, and better burning rate is achieved.

Description

technical field [0001] The invention relates to a W-shaped flame furnace, in particular to a W-shaped flame boiler with double cyclone tube burners for stable pulverized coal combustion. Background technique [0002] W-type flame boilers are mainly used for burning low-volatile coal types. The existing double-cyclone burners—W-type flame boilers (such as figure 2 shown) usually has the following characteristics: the pulverized coal airflow primary air nozzle 6 and the exhaust gas nozzle 7 are arranged on the arch, the secondary air B6-1, A7-1, C nozzle 5 are arranged on the arch, the secondary air D8, E9 , F10 is arranged on the front and rear walls under the arch. The F air nozzle (10) of the conventional double cyclone burner W-type flame boiler is horizontal. This kind of boiler has problems such as difficulty in adding air when the load is high, poor combustion stability, and poor burnout performance. After the angle is tilted down, the combustion economy is greatly im...

AI Technical Summary

Problems solved by technology

The F air nozzle (10) of the conventional double cyclone burner W-type flame boiler is horizontal. This kind of boiler has problems such as difficulty in adding air when the load is high, poor combustion stability, and poor burnout performance. After the angle is tilted down, the combustion economy has been greatly improved, but there is still a situation of poor combustion stability under high load, especially when the coal quality fluctuates greatly

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