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Low-nitrogen combustion device without primary air and secondary air, and application method

A low-nitrogen combustion and secondary air technology, applied in the combustion method, the use of multiple fuel combustion, the use of block fuel and liquid fuel combustion, etc., can solve the problem of high NOx emission concentration in boilers, and achieve lower emission concentration and combustion. The effect of widening the space adjustment space and reducing NOx

Active Publication Date: 2014-03-26
哈尔滨龙高科环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of high NOx emission concentration of the boiler when the primary air rate is high in the pulverized coal boiler, the present invention provides a low-nitrogen combustion device without main secondary air and its use method

Method used

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  • Low-nitrogen combustion device without primary air and secondary air, and application method
  • Low-nitrogen combustion device without primary air and secondary air, and application method
  • Low-nitrogen combustion device without primary air and secondary air, and application method

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specific Embodiment approach 1

[0022] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment. This embodiment includes a bottom air nozzle 3, a compact overburning air nozzle 4, a lower separated overburning air nozzle 5, an upper separated overburning air nozzle 6, an oiling secondary air nozzle 2, an oil lowering Secondary air nozzle 13 and at least three primary air nozzles 1, upper separated overburning air nozzle 6, lower separated overburning air nozzle 5, compact overburning air nozzle 4, oiling secondary air nozzle 2, at least three A continuous arrangement of the primary air spout 1, the secondary air spout 13 and the bottom air spout 3 are arranged sequentially from top to bottom, the middle of the primary air spout 1 is vertically provided with a partition 12, and the middle of the primary air spout 1 The blunt body 10 is horizontally arranged, and the upper and lower spouts on the right side of the blunt body 10 are thick coal powder primary air spouts 7, and ...

specific Embodiment approach 2

[0023] Specific implementation mode two: combination figure 2 The present embodiment will be described. The ratio of the height H to the width B of the primary air nozzle 1 in the present embodiment is 1.2 to 1.5. When the primary air rate is high, increase the area of ​​the primary air nozzle without increasing the lateral distance of the primary air nozzle 1 installation channel (without damaging the original water wall), and control the actual primary wind speed at 24m / s~30m / s. At the same time, a large-area peripheral air nozzle on the backfire side can be set to ensure that the primary air jet does not hit the wall. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0024] Specific implementation mode three: combination figure 2 Describe this embodiment, the peripheral wind 9 on the side of the primary air nozzle 8 of the light pulverized coal in this embodiment is the peripheral wind 9-1 on the backfire side, and the peripheral wind 9 on the primary air nozzle 7 side of the thick pulverized coal is the peripheral wind 9-1 on the fire side 2. The area of ​​the perimeter wind 9-1 on the backfire side is 3 to 6 times the area of ​​the perimeter wind 9-2 on the fire side. Other components and connections are the same as those in the second embodiment.

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Abstract

The invention discloses a low-nitrogen combustion device without primary air and secondary air, and an application method, and relates to a combustion device of a pulverized coal tangentially fired boiler so as to solve the problem of easiness in causing higher NOx emission concentration of a boiler at a high primary air rate of the pulverized coal boiler. An upper separating over fire air nozzle, a lower separating over fire air nozzle, a compact over fire air nozzle, an oiling secondary air nozzle, and at least one primary air nozzle, at least one deoiling secondary air nozzle and at least one bottom air nozzle which are continuously arranged, are arranged from the top to bottom in sequence, a partition board is vertically arranged in the middle of the primary air nozzle, a blunt body is horizontally arranged in the middle of the primary air nozzle, the upper nozzle and the lower nozzle at the right side of the blunt body are thick pulverized coal primary air nozzles, the upper nozzle and the lower nozzle at the left side of the blunt body are thin pulverized coal primary air nozzles, a steady burning tooth is arranged in each thick pulverized coal primary air nozzle, and the periphery of the edge of each air nozzle is provided with surrounding air. The low-nitrogen combustion device without primary air and secondary air and the application method can be used for efficient low-pollution combustion of the pulverized coal boiler with the high primary air rate.

Description

technical field [0001] The invention relates to a combustion device of a pulverized coal tangential combustion boiler, in particular to a low-nitrogen combustion device without main secondary air and a use method thereof. Background technique [0002] The tangential combustion technology of pulverized coal furnace generally refers to the way that the pulverized coal airflow is introduced into the furnace for combustion from the straight-through burners arranged at the 4 corners (or 6 corners, 8 corners) of the furnace. The air-powder mixture from each corner works together to form a strong swirling fireball in the furnace. Generally, the primary and secondary air outlets are often arranged at intervals, and the geometric centerlines of each air outlet are respectively tangent to one or several imaginary circles in the center. In tangential pulverized coal combustion boilers, some boilers have insufficient drying capacity due to high moisture and low calorific value of coal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C1/10F23C5/32F23C7/00F23K3/02
Inventor 王正阳任立立陆叶张小弟果志明王英杰李慧生
Owner 哈尔滨龙高科环境科技有限公司
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