Maintaining and energy-saving method for blowout stand-by boiler

A standby boiler and maintenance technology is applied in the field of maintenance during the period of industrial boiler shutdown and standby, which can solve the problems of high maintenance energy consumption, slow startup of standby boilers, and inability to meet continuous production of enterprises, so as to achieve rapid startup and reduce wall temperature difference. , good maintenance effect

Active Publication Date: 2011-08-31
KUNMING CELLULOSE FIBERS CO LTD
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AI Technical Summary

Problems solved by technology

The above maintenance methods are suitable for the situation that the boiler is shut down and not hot standby. After long-term practice, it is proven and widely used. However, if the boiler needs to be in a long-term standby state after shutdown, the above maintenance methods will The disadvantage of slow startup of the standby boiler is obvious, it cannot meet the needs of continuous production of the enterprise, and the maintenance energy consumption is high

Method used

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  • Maintaining and energy-saving method for blowout stand-by boiler
  • Maintaining and energy-saving method for blowout stand-by boiler

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] 1. Water side maintenance: When the boiler is running, the PH value of the boiler water is actually controlled between 10 and 12. Therefore, after the boiler is shut down for standby, keep the boiler water during operation, maintain the drum water level 11 within the range of ±30mm from the center of the drum, close all drain valves and drain valves, and perform water side maintenance.

[0016] 2. Steam side maintenance: After the boiler is shut down for standby, fully open its main steam electric valve 2 and main steam manual valve 3, close the manual emptying primary valve 5 and manual emptying secondary valve 4, and drain the water from the low-pressure steam main pipe The pipeline leads 3kg of low-pressure steam through its main steam pipe 1, the outlet header of the secondary superheater 6, the secondary superheater 7, the primary superheater 8, and the inl...

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Abstract

The invention relates to a maintaining and energy-saving method for a blowout stand-by boiler, which comprises the following steps: after the boiler steps out, reserving a fire bed; after the boiler is naturally cooled, when the exit temperature of the furnace chamber drops to 100 DEG C or so, the drum pressure is 0.05-0.1 MPa and the water level is kept within the range of drum central line +/-30mm, carrying out maintenance: carrying out water-side maintenance and vapor-side maintenance, and restarting the blowout stand-by boiler every 24 hours, wherein every time the restarting operation is finished, the opening of the fume outlet baffle is controlled at 10%, and the furnace chamber draft is adjusted to the minimum. The method provided by the invention well overcomes the defects in the prior art. The test proves that the method has favorable application effect and has the characteristics of quick start of the blowout stand-by boiler, favorable maintenance effect and obvious energy-saving effect.

Description

technical field [0001] The invention belongs to the technical field of maintenance during standby of industrial boilers, and in particular relates to a maintenance and energy-saving method for drain pipe boilers of chain furnaces during standby. Background technique [0002] The maintenance of the boiler during shutdown is mainly to prevent the corrosion of the boiler. If the maintenance is not good, the corrosion is often more serious during the shutdown period than when the boiler is running. Corrosion is caused by moisture on the metal surface and the entry of air. As long as it is kept dry or isolated from air (oxygen), corrosion can be effectively prevented. Commonly used shutdown maintenance methods include pressure maintenance, wet maintenance, dry maintenance and inflation maintenance. The above maintenance methods are suitable for the situation that the boiler is shut down and not hot standby. After long-term practice, it is proven and widely used. However, if the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F15/00
Inventor 陈浩杨必胜
Owner KUNMING CELLULOSE FIBERS CO LTD
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