Plasma auto-ignition pulverized coal stabilizing device for peak regulation of coal-fired boiler and stabilizing method
A plasma and automatic ignition technology, which is applied in the direction of burners, combustion methods, combustion ignition, etc. for burning powder fuel, can solve the problems of high operation and maintenance costs, increased operation costs, and incomplete combustion of fuel oil, and achieve processing costs and The effect of low operating cost, meeting the requirements of deep peak shaving, and large operating adjustment range
Active Publication Date: 2022-05-17
SHANXI WENLONG COAL MINE ENG DESIGN
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Problems solved by technology
[0004] The auxiliary fuel technology is to use oil (gas) to ensure the stable combustion of pulverized coal. However, due to the large fuel consumption and high operating costs, the fuel combustion is not complete during use, which affects the operation effect and safety of the purification equipment of the post-system.
[0005] Plasma ignition and stable combustion technology is to use high voltage to generate arc between positive and negative electrodes, so that compressed air can generate plasma with high energy density under high pressure, and ignite the pulverized coal flow to achieve the purpose of stable combustion. The system is relatively complicated and the investment cost is high. High-power components have a short service life and high operating and maintenance costs
[0006] Oxygen-enriched stable combustion technology adds a set of liquid oxygen storage and delivery system, which increases operating costs and poses safety hazards
[0007] The difficulty of air preheating and stable combustion technology lies in the control of preheating temperature. If the preheating temperature is too low, it will not be effective; if the temperature is too high, it will easily lead to deflagration in the pipeline and affect long-term operation.
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[0041] It must be noted that, as used in this specification and the appended claims, the singular forms "a", "an" and "the / said" may include both a referent and a referent unless the context clearly dictates otherwise. Include multiple referents (ie, more than two, including two).
[0042] Unless otherwise indicated, the numerical ranges in the present invention are approximate, and therefore may include values outside the stated range. Such numerical ranges may be expressed herein as from "about" one particular value, and / or to "about" another particular value. When such a range is stated, another aspect includes from the one particular value and / or to the other particular value. Similarly, when values are expressed as approximations, by use of the antecedent "about," it will be understood that the particular value forms another aspect. It is also to be understood that each endpoint of a numerical range is significant in relationship to and independent of the other endp...
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Disclosed is a plasma automatic ignition pulverized coal stabilizer for peak regulation of a coal-fired boiler, including a furnace body and a control box; The inner wall of the furnace; the inner wall of the furnace has at least one wear-resistant layer, and a thermocouple is arranged on the inner wall of the furnace; the control box is used to control the automatic start and stop of the plasma, and is electrically connected to the thermocouple. In addition, a corresponding combustion stabilization method is also disclosed. The stable burner has simple structure, strong coal type adaptability, and large operation adjustment range.
Description
technical field [0001] The invention belongs to the technical field of a high-efficiency energy-saving coal-fired boiler burner stabilizer and relates to a plasma automatic ignition pulverized coal burner stabilizer for peak regulation of a coal-fired boiler and a burner stabilized method. Background technique [0002] When the coal-fired boiler generator set is in deep peak regulation, the operating load is reduced, the primary air volume is also reduced, the air temperature is also reduced, the furnace temperature is reduced, the combustion heat in the boiler is reduced, the combustion stability of pulverized coal is reduced, and the boiler is easy to extinguish. [0003] At present, the peak-shaving and stable combustion technologies of coal-fired boilers mainly include auxiliary fuel ignition and stable combustion technologies, plasma ignition and stable combustion technologies, oxygen-enriched and stable combustion technologies, and air preheating and stable combustion t...
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IPC IPC(8): F23D1/00F23Q9/00
CPCF23D1/00F23Q9/00F23D2201/20Y02E20/34
Inventor 江河房倚天胡毅辉李春玉赵建涛聂伟
Owner SHANXI WENLONG COAL MINE ENG DESIGN