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Uniform air distribution device for air chamber inlet of grate-fired furnace

A technology of air distribution device and bed combustion furnace, which is applied in the field of power engineering, can solve problems such as unfavorable coal seam stability, and achieve the effects of reducing resistance loss, reducing speed peaks, and leveling the range

Inactive Publication Date: 2014-08-06
XI AN JIAOTONG UNIV +1
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Problems solved by technology

However, for the current single-side air-inlet layer combustion chamber equipped with an equalizer plate, most of the upper part of the air chamber is equipped with a partition, due to its forced flow diversion, all appear on the fire grate corresponding to the partition. Local high-speed areas are very unfavorable for maintaining the stability of coal seams

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  • Uniform air distribution device for air chamber inlet of grate-fired furnace

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Embodiment Construction

[0009] The structural principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0010] See attached figure 1 , the present invention includes a reverse "J" shaped upper partition 1 installed on the upper part of the inlet of the air chamber of the layer-burning furnace. The length of the lower straight section is 25~40mm, the angle between the upper straight section and the lower straight section of the upper partition and the horizontal line is -30°~30°, the total height of the upper partition H1=a+(0.3~0.4)x; the upper partition A "balance hole" 2 is set in the vertical part of the upper partition; the distance between the upper partition and the air inlet of the air chamber S1=(0.5~0.6)×(0.25~0.3)L; where a is the distance between the grate and the upper part of the air inlet, and x is the air inlet The height of the tuyere, L is the length of the air chamber.

[0011] In the present invention, a reverse ...

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Abstract

A uniform air distribution device for an air chamber inlet of a grate-fired furnace comprises an inverted 'J'-shaped upper partition plate mounted on the upper portion of the air chamber inlet of the grate-fired furnace. The distance between the top end of the upper partition plate and a grate ranges from 10mm to 40mm, the length of an upper straight section of the upper partition plate ranges from 10mm to 20mm, the length of a lower straight section of the upper partition plate ranges from 25mm to 40mm, the total height H1 of the upper partition plate is equal to a+ (0.3-0.4) x, a 'balancing hole' 2 is arranged on a vertical portion of the upper partition plate, and the distance S1 between the upper partition plate and an air inlet of an air chamber is equal to (0.5-0.6)X(0.25-0.3) L, wherein the a refers to the distance between the grate and the upper portion of the air inlet, the x refers to the height of the air inlet, and the L refers to the length of the air chamber. By the aid of the uniform air distribution device, fine air distribution uniformity of the air chamber is ensured, resistance is controlled within a narrow range, and conditions are created for improving the operation efficiency of the grate-fired furnace, saving energy and reducing emission.

Description

technical field [0001] The invention belongs to an air distribution device in the technical field of power engineering, and in particular relates to an air distribution device for improving the uniformity of lateral air distribution of a layered combustion furnace. Background technique [0002] my country's industrial boilers are widely used. According to the data from the National Bureau of Statistics and the Bureau of Special Equipment, by the end of 2010, the total number of boilers in the country exceeded 600,000, and more than half of them were fired furnaces. The design efficiency of industrial boilers in my country is generally only 1% to 3% lower than that of developed countries, but the operating efficiency is more than 10% lower. The main reasons for the low operating efficiency and large heat loss of the floor-burning furnace are the unreasonable air distribution and poor adaptability of the floor-burning furnace. The existing layer-fired furnace generally has th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23L1/00
Inventor 惠世恩陈志良荆强征徐通模李文杰周屈兰谭厚章赵钦新李娜王宇峰高青王志鹏高振兴
Owner XI AN JIAOTONG UNIV
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