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Boiler over-fire air adjusting method based on momentum moment

An adjustment method, a technology of burnout air, applied in the combustion method, combustion air/fuel supply, adjustment of air supply and other directions, can solve problems such as adjustment of boiler burnout air, and achieve elimination of residual rotation, convenient use, and flue gas distribution. uniform effect

Active Publication Date: 2020-08-18
CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a method for adjusting boiler overfire air based on dynamic moment, which can effectively solve the problem of boiler overfire air adjustment

Method used

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  • Boiler over-fire air adjusting method based on momentum moment
  • Boiler over-fire air adjusting method based on momentum moment
  • Boiler over-fire air adjusting method based on momentum moment

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Embodiment Construction

[0043] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings and examples.

[0044] A method for adjusting boiler burn-out air based on power moment, including a four-corner tangential combustion boiler, the combustion area forms a clockwise or counterclockwise combustion tangent circle, and in order to eliminate residual rotation in burn-out air, a counterclockwise or clockwise rotation is formed. the inverse circle of

[0045] The sum of the momentum moments of the burners with opposite rotation directions in the main combustion zone is the anti-tangential wind momentum moment; the sum of the momentum moments of the burners with the main combustion zone rotating in the same direction is the tangential wind momentum moment;

[0046] The sum of the inverse tangential wind momentum and the sum of the tangential wind momentum are compared:

[0047]

[0048] In the formula, M 反 is ...

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Abstract

The invention relates to a boiler over-fire air adjusting method based on momentum moment. According to the technical scheme, the method comprises steps as follows: burner momentum moment in oppositerotating directions in a main burning zone is summated to obtain reverse tangent wind momentum moment; burner momentum moment in the same rotating direction in the main burning zone is summated to obtain tangent wind momentum moment; a ratio of the sum of the reverse tangent wind momentum moment to the sum of the tangent wind momentum moment is obtained, and a reverse tangent angle of over-fire air is adjusted through an over-fire air adjusting mechanism until the ratio is in a range of 0.8-1.2. According to the method, a thermal state adjusting effect is realized by a cold state test, workingprocess and workload are simplified, and working efficiency is greatly increased; by adjustment for the boiler over-fire air, a rotary cutting effect of the over-fire air is improved, residual rotation of a boiler is eliminated, flue gas in a horizontal flue of the boiler is uniformly distributed, finally, dust is accumulated in the horizontal flue uniformly, besides, the falling dust has no influence on boiler disturbance, negative pressure avoids fluctuating sharply, flue gas temperature difference and steam temperature difference of the horizontal flue are reduced, and safe operation of the boiler is improved.

Description

technical field [0001] The invention relates to a method for adjusting boiler burn-out air based on power moment. Background technique [0002] Coal-fired generator sets are the main force of electric power now. Four-corner tangential combustion boilers have been widely used in coal-fired generator sets. The primary and secondary co-rotating combustions are used, and a few layers of reverse paranoid winds are arranged in the main combustion area to reduce the coking of the furnace in the main combustion area, but the rotation direction of the main combustion area cannot be changed. The overburning air is arranged on the upper part of the furnace. The overburning air has the function of swinging left and right. It can be adjusted through the left and right adjustment mechanism of the overburning air. The adjustment mechanism has an adjustment angle display to eliminate the residual rotation of the boiler circle. In the actual operation of the boiler, in order to reduce NOx e...

Claims

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Application Information

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IPC IPC(8): F23L1/00F23L9/00F23N3/00
CPCF23L1/00F23L9/00F23N3/00
Inventor 李有信王磊蓝晓村程金武安敬学姬亚许贺廖彭伟孔禹
Owner CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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