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Method for controlling operation of minitype oil burner of 1050 MW 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: 2015-08-19
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Application Information

AI Technical Summary

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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  • Method for controlling operation of minitype oil burner of 1050 MW ultra-supercritical pulverized coal boiler
  • Method for controlling operation of minitype oil burner of 1050 MW ultra-supercritical pulverized coal boiler

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Embodiment Construction

[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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Abstract

The invention relates to a method for controlling the operation of a minitype oil burner of a 1050 MW ultra-supercritical pulverized coal boiler. The method for controlling the operation of the minitype oil burner of the 1050 MW ultra-supercritical pulverized coal boiler comprises the steps that a primary draught fan is started before the minitype oil burner is used for ignition; when the minitype oil burner is used for ignition, the oil pressure of a main oil supply pipe is 2.8-2.9 Mpa, the primary wind speed is 20-30 m / s, the output force of the minitype oil burner is 130 kg / h, and the temperature of the wall of the minitype oil burner is controlled to be 280-500 DEG C. According to the method for controlling the operation of the minitype oil burner of the 1050 MW ultra-supercritical pulverized coal boiler, the primary draught fan is started before the minitype oil burner is used for ignition, when the minitype oil burner is used for ignition, the oil pressure of the main oil supply pipe is 2.8-2.9 Mpa, the primary wind speed is 20-30 m / s, the output force of the minitype oil burner is 130 kg / h, and the temperature of the wall of the minitype oil burner is controlled to be 280-500 DEG C, in this way, the situation that the minitype oil burner is coked due to the fact that the temperature of the wall is too high is solved, and normal operation of the burner and the boiler is guaranteed.

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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Application Information

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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
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