Combustor and method for improving combustor
A technology of burners and combustion cylinders, which is applied in the direction of combustion methods, burners, and burners for burning powder fuels, etc. It can solve problems such as coal powder density and airflow speed are not uniform, affect combustion quality, and cannot turn airflow.
Inactive Publication Date: 2013-02-13
YANTAI LONGYUAN POWER TECH
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Problems solved by technology
However, due to space constraints, the deflector cannot completely divert the airflow
Since the two airflows cannot be completely parallel, the incoming airflow will blow the plasma flame (or the previous stage flame) away, thereby increasing the temperature of the cylinder wall and making the pulverized coal slagging
[0007] In addition, in this technology, since the air flow containing pulverized coal and the air flow enter in the direction perpendicular to the combustion tube, the density of pulverized coal and the velocity of the air flow are not uniform on the cross section perpendicular to the combustion tube. , thus affecting the combustion quality
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[0038] image 3 A partial schematic cross-sectional view of a first embodiment of a plasma-ignited burner of the first aspect of the invention is shown. For simplicity, the figure also only shows the figure 2 Similar pulverized coal-laden air flows into the inlet 102 , the first stage combustor 104 and the second stage combustor 106 . Since the structure of the multi-stage combustor has also been described above, it will not be repeated here. What needs to be clarified is that, as mentioned in the background technology section, there are no restrictions on the number of stages of the combustion chamber that the air flow containing pulverized coal enters, the technology of the combustion chamber that directly enters the air, and the total number of stages of the combustion chamber, which can be determined according to the power requirements and the size of the space The total number of stages varies from two to three, four or more, depending on the application, such as figu...
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The invention relates to a burner and a method for modifying the burner. The burner comprises at least two stage burning cylinders and an ignition device which ignites coal dusts in a first stage burning cylinder of the two stage burning cylinders, wherein the burning flame of the upper stage burning cylinder ignites the coal dusts in the lower stage burning cylinder, or burns with complementary air in the lower stage burning cylinder, and the burner further comprises a first cylinder, a second cylinder, a first tube and a second tube, wherein the first cylinder is used to provide coal dusts containing air flow for at least one stage burning cylinder, including the first stage burning cylinder, the second cylinder arranged outside the first cylinder is used to provide coal dusts containing air flow for at least one stage burning cylinder which follows the burning cylinders inside the first cylinder, the first tube is used to provide coal dusts containing air flow for the first cylinder, and the second tube is used to supply coal dusts containing air flow for the second cylinder. The method for modifying the burner is to modify the existing burner with a center cylinder into the above burner, and the center cylinder is used as the first cylinder of the burner.
Description
technical field [0001] The invention relates to the technical field of pulverized coal combustion, in particular to a burner and a method for transforming an existing burner. Background technique [0002] Coal-fired thermal power generation is currently the main power generation method adopted by various countries. Ignition is a major aspect of the boiler combustion process. With the increase of boiler capacity, how to complete the start-up process of the boiler quickly and economically is a major problem to be solved urgently. [0003] In order to replace the oil ignition method that consumes a large amount of fuel, plasma ignition technology has been developed in recent years. [0004] In order to ignite low-quality coal, the traditional plasma ignition system adopts the "pre-chamber" technology. The composition of the pre-combustion chamber is to insulate the combustion cylinder, usually a layer of refractory material is lined in the combustion chamber. Through the ini...
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IPC IPC(8): F23C6/04F23C7/00F23D1/00
Inventor 苗雨旺唐宏刘鹏牛涛纪书信蔡飞王新光于文波
Owner YANTAI LONGYUAN POWER TECH