Method and system for avoiding slagging of circulating fluid bed boiler furnace

A circulating fluidized bed and boiler furnace technology, applied in the field of boiler combustion, can solve problems such as slagging accidents, poor furnace temperature control, etc., achieve the best technical effect and avoid the effect of furnace slagging

Inactive Publication Date: 2013-03-27
SHANGHAI INTELLIGENCE POWER ENG CO LTD
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Problems solved by technology

[0003] In the past boiler operation, pulverized coal furnaces were limited by combustion conditions, so other technical measures could only be taken to avoid furnace slagging
The circulating fluidized b...

Method used

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  • Method and system for avoiding slagging of circulating fluid bed boiler furnace

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Embodiment Construction

[0012] A method for avoiding slagging in the hearth of a circulating fluidized bed boiler in this embodiment, when applied to the hearth of a circulating fluidized bed boiler, the low-pressure saturated steam is sequentially squeezed through the wind box and the air distribution plate and introduced into the hearth of the circulating fluidized bed boiler in combustion , can temporarily block its combustion, and can avoid slagging in the furnace of the circulating fluidized bed boiler. This method can manually introduce low-pressure saturated steam at any time according to needs. Of course, low-pressure saturated steam can also be introduced into the furnace at regular intervals to maintain the effect of continuously avoiding slagging. This embodiment is easy to operate and low in labor intensity. Exemplarily, the preferred pressure of the low-pressure saturated steam in this method is 0.5 MPa, and the corresponding temperature of the low-pressure saturated steam can be directly...

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Abstract

The invention discloses a method and a system for avoiding the slagging of a circulating fluid bed boiler furnace. According to the method, low-pressure saturated steam sequentially passes through an air box and an air distribution plate and is pushed into the circulating fluid bed boiler furnace in burning. The system comprises the circulating fluid bed boiler furnace, a low-pressure steam header, a drainage tank and a discharge pipeline, wherein the circulating fluid bed boiler furnace is provided with the air box and the air distribution plate, the low-pressure steam header is used for outputting the low-pressure saturated steam, the drainage tank is used for recovering condensed water, and the discharge pipeline is directly connected with a trench; the low-pressure steam header is connected with the air box through a steam water pipeline; the low-pressure saturated steam output by the low-pressure steam header is input into the circulating fluid bed boiler furnace through the air box and the air distribution plate; and the drainage tank and the discharge pipeline are arranged on the steam water pipeline in a connecting manner. The method and the system have the advantages that the slagging of the circulating fluid bed boiler furnace can be avoided, and the deficiencies that slagging occurs easily and shutdown slag removal is often required, and potential safety hazard of the original furnace are overcome.

Description

technical field [0001] The invention relates to the technical field of boiler combustion, in particular to a method and system for avoiding slagging in a furnace of a circulating fluidized bed boiler. Background technique [0002] Circulating fluidized bed boilers are widely used in various industries because of their good adaptability to coal types, high combustion efficiency, and high desulfurization efficiency. However, they are often shut down because the furnace is prone to slagging, and the slag removal is labor-intensive and takes a long time. How to avoid slagging in such boilers is still an important problem that all circulating fluidized bed boiler operating units pay attention to. [0003] In the past boiler operation, pulverized coal furnaces were restricted by combustion conditions, so other technical measures could only be taken to avoid furnace slagging. The circulating fluidized bed boiler currently in operation has no good method to overcome the slagging of...

Claims

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Application Information

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IPC IPC(8): F23L7/00F23C10/18
Inventor 廖昌碧
Owner SHANGHAI INTELLIGENCE POWER ENG CO LTD
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