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Circulating fluidized bed boiler ignition apparatus and method thereof

A circulating fluidized bed and boiler technology, which is applied to combustion methods, combustion ignition, lighting and heating equipment, etc., can solve the problems of frequent furnace shutdowns for maintenance and wear, and achieve the effects of reducing start-up costs, saving fuel, and being easy to use.

Inactive Publication Date: 2009-06-24
张德君
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Since the circulating fluidized bed boiler works under the condition of high-speed air flow, it will cause serious wear and tear and require frequent shutdown and maintenance

Method used

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  • Circulating fluidized bed boiler ignition apparatus and method thereof

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Embodiment Construction

[0011] Such as figure 1 As shown, the left side is No. I circulating fluidized bed boiler, and the right side is No. II circulating fluidized bed boiler. Each circulating fluidized bed boiler includes a cyclone separator 1, a standpipe 2 and a feeder 5 installed under the cyclone separator. A red slag conveying device is connected to the slag discharge pipe 6 at the lower end of the feeder 5 of the two boilers. The device is a pneumatic conveying device, and valves are respectively installed between the pneumatic conveying device and the slag discharge pipe 6 . The outlet 4 connecting the feeder and the boiler is respectively connected with branch pipelines connected with the power conveying device, and valves are respectively installed on the branch pipelines.

[0012] When the No. I circulating fluidized bed boiler needs to be ignited and started after overhaul, the valve I7 and valve III11 are closed, and the valve II8 and valve IV12 are opened. At this time, the high temp...

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Abstract

The invention relates to a circulating fluidized bed boiler ignition device and an ignition method thereof. The boiler ignition device comprises a circulating fluidized bed boiler, a cyclone separator and a material return device which is arranged below the cyclone separator. The boiler ignition device is characterized in that one end of a red slag conveying device is connected with a slag discharge pipe of the material return device and a discharge outlet through two pipelines, the other end thereof is connected with the slag discharge pipe of the material return device on the adjacent circulating fluidized bed boiler, and valves are respectively arranged on the pipelines at the two ends of the red slat conveying device. The device and the method connect the two boilers through the red slag conveying device between the two circulating fluidized bed boilers, then when in ignition of one boiler after the overhaul, red slag with the high temperature of 800-900 DEG C of the other boiler can be utilized for starting up the boiler, thereby saving a great amount of fuel. The invention has the advantages of simple structure, convenient use and ability of effectively reducing the startup cost of the boiler after the overhaul.

Description

Technical field [0001] The invention relates to an ignition device and an ignition method for a circulating fluidized bed boiler. Background technique [0002] At present, large-scale circulating fluidized bed technology has become mature and is mainly used for coal-fired thermal power generation. The basic process of the circulating fluidized bed boiler is as follows: after coal and desulfurizer are sent into the furnace, they are quickly surrounded by a large amount of inert high-temperature materials, ignited and burned, and desulfurized at the same time, and move to the upper part of the furnace under the action of the rising flue gas flow. The water-cooled wall and other heating surfaces arranged in the furnace release heat. After the coarse particles enter the suspension area, they deviate from the main airflow under the action of gravity and external force, so as to stick to the wall and flow down. The gas-solid mixture enters the high-temperature cyclone separator ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23Q13/00
Inventor 张德君
Owner 张德君
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