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Constant speed retrofitted low NOx coal powder burner

A pulverized coal burner, thick and thin technology, applied in the direction of burners, burners burning powder fuel, combustion methods, etc., can solve the problem of ignition stability, combustion efficiency and denitrification rate are not ideal, anti-slagging and high-temperature corrosion capabilities To achieve the effects of enhanced anti-slagging, enhanced high-temperature corrosion resistance, improved combustion efficiency and denitrification rate

Inactive Publication Date: 2007-10-17
TONGJI UNIV
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  • Description
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Problems solved by technology

The adverse consequences brought about by this are: the ignition stability, combustion efficiency and denitrification rate are not ideal, and the ability to prevent slagging and high-temperature corrosion is also limited

Method used

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  • Constant speed retrofitted low NOx coal powder burner
  • Constant speed retrofitted low NOx coal powder burner

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Experimental program
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Embodiment Construction

[0012] The constant-velocity thick-lean low NOx pulverized coal burner of the present invention is shown in Fig. 2, and its partition blade form has two kinds, and a kind of is the plate-shaped partition blade 3 of about 0°, and a kind of is the spiral partition of about 180° Blade 4.

[0013] 1. Five pressure equalization grooves 5 are arranged on the flat plate-shaped partition blade 3 at about 0°. , 1, 1.5, 2 and 2.5 times the equivalent diameter;

[0014] 2. Five pressure equalizing grooves 5 are arranged on the spiral partition blade 4 of about 180°. The pressure equalizing grooves are rectangular and spaced from each other. It can be selected at 0.5 to 2.5 times the equivalent diameter of the partition blade 4, for example, the position is located at 0.5 , 1, 1.5, 2 and 2.5 times the equivalent diameter.

[0015] The above description of the embodiments is for those of ordinary skill in the art to understand and apply the present invention. It is obvious that those sk...

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Abstract

A constant velocity shade type low NOx coal powder burner includes a separating blade which is disposed with equalizing pressure grooves. The equalizing pressure grooves are disposed at a place with 0.5-2.5 times equivalent diameter on the separating blade. The number of the equalizing pressure groove is one to five. The separating blade includes a 0 degree flat plate shape separating blade and a 180 degrees helical separating blade. The invention had the following advantages: the constant velocity shade type low NOx coal powder burner is a high efficiency low NOx coal powder burner; the burner conquers the fault that the speed in double passages of the shade burner is unequal, and improves the coal powder concentration of concentrated side by about 20% and reduces the coal powder concentration of the weak side by about 20%. Therefore, the constant velocity shade type low NOx coal powder burner is improved in fire stability, burning efficiency and denitrate rate compared with conventional shade coal powder burner, and is also greatly enhanced in slagging proof and high temperature corrosion proof abilities.

Description

technical field [0001] The invention belongs to the field of thermal energy engineering, and relates to power station coal-fired boilers and industrial coal-fired boilers. Background technique [0002] The existing horizontal thick and thin pulverized coal burner is shown in Figure 1. It uses the pipe elbow to concentrate the pulverized coal, and uses a flat plate or spiral blade 1 to maintain the thick and light ratio to form a thick and thin pulverized coal jet 2 for combustion in the boiler furnace. The horizontal thick and thin pulverized coal burner The velocity difference in the two channels of the thick and thin pulverized coal jet is 4-6m / s. The unfavorable consequences are that the ignition stability, combustion efficiency and denitrification rate are not ideal, and the ability to prevent slagging and high-temperature corrosion is also limited. Contents of the invention [0003] The purpose of the present invention is to provide a kind of low NOx pulverized coal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D1/00
Inventor 安恩科
Owner TONGJI UNIV
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