A boiler furnace large slag recycling system

Abstract

The invention provides a boiler furnace slag recycling system. The boiler furnace slag recycling system comprises a hearth, a slag dredger, a recovery bin and a recovery pipe; the recovery bin is mounted below the hearth; an inlet of the slag dredger is formed below the recovery bin; the recovery pipe is connected to the upper end of the side surface of the hearth from the side surface of the recovery bin; a recovery bin inlet air brake and a recovery bin slag discharge air brake are respectively arranged at the upper and lower two ends of the recovery bin; a hot air inlet is mounted on the side surface, opposite to the recovery pipe, of the recovery bin; and a combustor is arranged in the connecting place between the recovery pipe and the hearth. The boiler furnace slag recycling system is higher in hearth maintenance safety, reduces the car content of slag in a boiler, improves the boiler efficiency, has no need to highly open secondary air on the lower layer to reduce the slag to influence the boiler combustion, reduces faults of the slag dredger, prolongs the life of the slag dredger, and reduces the electric consumption. One part of slag physical heat is directly discharged in to a boiler furnace to reduce the heat loss of the boiler. The hearth is not directly communicated with the water surface of the slag dredger to prevent water vapor from directly entering the hearth to influence the boiler combustion so as to cause extinction.

Description

technical field [0001] The invention relates to a recycling system for large slag in a boiler furnace. Background technique [0002] At present, the large slag of the solid-state slag discharge boiler in thermal power plants is directly discharged into the hull of the slag extractor, which has the following problems: 1. When the slag extractor is overhauled, a water seal baffle is used to block the slag, and the safety factor is not high. 2. After the large boiler slag is discharged, it is directly loaded to the ash yard by car. The large slag with high carbon content cannot be used, which affects the economy of the boiler. 3. In order to reduce the carbon content of the large slag, the operating personnel generally increase the bottom air, which reduces the stability of the boiler combustion, and increases the risk of boiler flameout for boilers with poor combustion. 4. The amount of boiler slag is large, the speed of the slag extractor is fast and the output is large, whi...

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Problems solved by technology

[0002] At present, the large slag of solid-state slag discharge boilers in thermal power plants is directly discharged into the hull of the slag extractor, and there are the following problems: 1. When the slag extractor is overhauled, the safety factor is not high because the water seal baffle is used to block the slag.

2. After the boiler slag is discharged, it is directly loaded to the ash yard by car, and the large slag with high carbon content cannot be used, which affects the economy of the boiler

3. In order to reduce the carbon content of the large slag, the operating personnel generally increase the bottom air, which reduces the stability of the boiler combustion, and increases the risk of boiler flameout for boilers with poor combustion

4. The amount of slag in the boiler is large, the speed of the slag machine is fast and the output is large, it is easy to cause the failure of the slag machine and affect the life of the slag machine, increasing the power consumption of the slag machine

5. The physical heat of ash and slag is directly discharged into the slag removal machine, which affects the economy

6. When the large coke is broken, more water vapor is generated, which enters the furnace and affects the combustion of the boiler, which may cause the boiler to stall

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