Low NOx combustion method and low NOx combustion system
A combustion method and burner technology, applied in low NOx combustion system and low NOx combustion field, can solve the problems of flue gas pollution, increased production cost, environmental pollution, etc., and achieve the effect of reducing NOx emissions
Active Publication Date: 2017-10-27
湖南高华环保股份有限公司
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Problems solved by technology
[0002] Combustion furnaces in the prior art generally use coal as fuel, and the flue gas generated after coal combustion contains a large amount of nitrogen oxides, which is very easy to cause environmental pollution
[0003] In order to solve the problem of flue gas pollution, the traditional method is to use water or liquid medicine to wash the flue gas. Although this can eliminate some nitrogen oxides, it will increase production due to the need to replace the liquid medicine every once in a while. cost
In addition, the purification effect of flue gas still needs to be improved by using gas scrubbing to eliminate nitrogen oxides.
Method used
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[0034] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.
[0035] In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer" , "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention. In addition, t...
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A low-NOx combustion method comprises the steps that a pulverized coal burner and a separated over-fire air burner are arranged in a hearth in a partitioned mode, air spraying openings and an over-fire air spraying opening are provided, a main combustion area, a secondary combustion area and an NOx reducing area are formed in the hearth, and the air spraying openings and the over-fire air spraying opening are used for providing air for combustion; oxygen-deficient combustion is conducted in the main combustion area under the condition of abundant fuel, and oxygen-enriched combustion is conducted in the secondary combustion area; and steam injection operation is conducted when the fuel at the main combustion area burns. According to the low-NOx combustion method, the oxygen concentration in a primary combustion area is controlled while combustion is enhanced, NOx reduction is achieved under the condition of oxygen-deficient combustion, and the purpose of emission reduction is achieved. A low-NOx combustion system comprises a combustion furnace body and an air supply system, wherein the main combustion area, the reduction area and the secondary combustion area for oxygen-deficient combustion and oxygen-enriched combustion are sequentially arranged in the hearth of the combustion furnace body, the air supply system comprises the air spraying openings and the over-fire air spraying opening, and the over-fire air spraying opening is formed above the air spraying openings. The low-NOx combustion system can be used for conducting fuel-rich oxygen-deficient combustion, and the purpose of lowering NOx emission is achieved.
Description
technical field [0001] The present invention relates to the technical field of combustion devices, and more specifically relates to a low NOx combustion method and a low NOx combustion system. Background technique [0002] Combustion furnaces in the prior art generally use coal as fuel, and the flue gas generated after coal combustion contains a large amount of nitrogen oxides, which is very likely to cause environmental pollution. [0003] In order to solve the problem of flue gas pollution, the traditional method is to use water or liquid medicine to wash the flue gas. Although this can eliminate some nitrogen oxides, it will increase production due to the need to replace the liquid medicine every once in a while. cost. In addition, the gas scrubbing method is used to eliminate nitrogen oxides, and the purification effect of flue gas still needs to be improved. Contents of the invention [0004] (1) Technical issues [0005] How to reduce the content of nitrogen oxide...
Claims
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IPC IPC(8): F23C6/00
CPCY02E20/34
Inventor 李滔
Owner 湖南高华环保股份有限公司