Operation control method of micro-oil burner for 1050MW ultra-supercritical pulverized coal boiler
A pulverized coal boiler and ultra-supercritical technology, which is applied in the control of combustion, lighting and heating equipment, etc., can solve the problems affecting the primary air jet direction and jet velocity of the burner, boiler fire extinguishing, and primary air duct blockage.
Active Publication Date: 2018-01-30
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology
Therefore, coking can easily occur in the burner and at the burner outlet
Once coking occurs, it will definitely affect the jet flow direction and jet velocity of the burner, thus affecting the normal operation of the burner
In turn, it will affect the stability and economy of the entire furnace combustion. When the coking is serious, it may also cause a blockage of the air duct and a boiler fire extinguishment.
In addition, if the coking in the burner causes the pulverized coal flow to deflect outward, it will cause the flame to scour the water wall and cause coking on the water wall, which will also threaten the safe operation of the boiler
Method used
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[0028] This embodiment is described by taking the 1050 MW ultra-supercritical boiler manufactured by Harbin Boiler Works Co., Ltd. as an example. The boiler model is HG-3100 / 28.25-YM4.
[0029] The burner of the boiler adopts the octagonal reverse double tangential circle combustion method without partition wall, and the full swing burner. The burner has a total of six layers of primary air outlets, three layers of oil air chambers, and twelve layers of auxiliary air chambers. The entire burner is fixedly connected to the water-cooled wall and expands downward with the water-cooled wall. Four layers of additional burn-off air nozzles are arranged 7.2m (meters) above the center line of the upper layer of pulverized coal nozzles. Each burner is equipped with three mechanical atomization oil guns, and there are 24 oil guns in the whole furnace, and each oil gun is equipped with a high-energy ignition device. The pulverizing system adopts the medium-speed grinding positive pressu...
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The invention relates to a method for controlling the operation of a micro-oil burner of a 1050 megawatt ultra-supercritical pulverized coal boiler, which includes: before using the micro-oil burner to ignite, starting a fan; The oil pressure of the pipe is 2.8-2.9MPa, the primary wind speed is 20-30m / s, the output of the micro-oil burner is 130kg / h, and the wall temperature of the micro-oil burner is controlled at 280°C-500°C. The micro-oil burner operation control method of the 1050 MW ultra-supercritical pulverized coal boiler starts the fan once before using the micro-oil burner to ignite, and when the micro-oil burner is used to ignite, the oil pressure of the oil supply main pipe is set to The primary wind speed is 20-30m / s, the output of the micro-oil burner is 130kg / h, and the wall temperature of the micro-oil burner is controlled within the range of 280°C to 500°C to prevent the wall temperature from being too high And cause micro-oil burner coking, so as to ensure the normal operation of the burner and boiler.
Description
technical field [0001] The invention relates to the field of ultra-supercritical pulverized coal boilers in thermal power plants, in particular to a method for controlling the operation of a micro-oil burner of a 1050 megawatt ultra-supercritical pulverized coal boiler. Background technique [0002] Ultra-supercritical boilers refer to boilers with a working fluid pressure above 26MPa. Ultra-supercritical boilers have significant energy-saving and environmental-improving effects. Therefore, they are widely used in thermal power plants. [0003] The working principle of the micro-oil ignition burner is: the micro-oil gasification oil gun cooperates with the high-strength oil combustion chamber to form a high-temperature oil flame after combustion. The high-temperature oil flame is introduced into the first-stage combustion zone of the pulverized coal burner. When the dense-phase pulverized coal passes through gasification and burns the high-temperature flame, the temperature ...
Claims
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IPC IPC(8): F23N5/00
Inventor 李德波李方勇钟俊许凯陈磊成明涛
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID