Secondary air box structure of coal-fired W-flame boiler in power station

Abstract

The invention discloses a secondary air box structure of a coal-fired W-flame boiler in a power station. The secondary air box structure comprises an arch-zone secondary air box, an under-arch secondary air box and left and right main air ducts, wherein the arch-zone secondary air box and the under-arch secondary air box are independently arranged on the front and rear walls of the W-flame boiler respectively; the left and right main air ducts are arranged at both ends of the arch-zone secondary air box and the under-arch secondary air box; two arch-zone secondary air inlets and two under-arch secondary air inlets are respectively arranged in one sides of the arch-zone secondary air box and the under-arch secondary air box in the width direction; an arch-zone secondary small air door and an under-arch secondary small air door are respectively arranged on the other sides of the arch-zone secondary air box and the under-arch secondary air box in the width direction; the two arch-zone secondary air inlets of the arch-zone secondary air box are communicated with the left and right main air ducts through an arch-zone air box air inlet duct; and the two under-arch secondary air inlets of the under-arch secondary air box are communicated with the left and right main air ducts through an under-arch air box air inlet duct. The secondary air box structure has the advantages of uniformity in air distribution, stable air pressure and easiness in control.

Description

technical field [0001] The invention belongs to a power station boiler air box, in particular to a secondary air box structure of a coal-fired "W" flame boiler in a power station. Background technique [0002] With the increasing shortage of energy, the proportion of anthracite in my country's power coal has increased, and more and more "W" flame boilers have been put into operation in my country. The traditional arrangement of the burner air box is as follows: figure 1 As shown, the arch area and the secondary air under the arch share a large air box 1, and the hot air enters from the left and right ends of the large air box 1, and then passes through the secondary small air door 2 in the arch area and the secondary small air door under the arch on both sides of the large air box 1. 3 sent out, the air volume is controlled by electric door 4. The long-term operation shows that the arrangement of the arch area and the arch area sharing a large wind box has the problem of m...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the structure of the existing secondary air box is unfavorable to the economy and safety of the "W" flame boiler

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