A system and method for preventing boiler explosion

Abstract

The invention discloses a system and method for preventing a boiler from exploding outside. The system comprises a hearth, a water seal plug board, a slag conveyor and a water drainage system. The lower end of the hearth is fixedly provided with the water seal plug board. The slag conveyor is arranged at the lower end of the water seal plug board. The water drainage system is arranged on the slag conveyor and comprises a water drainage valve, a control valve and a pressure detection device. A pressure monitoring device is arranged on the hearth and used for detecting the pressure inside the hearth of the boiler and transmitting a detection signal to the control valve. The control valve is connected with a water drainage switch. The water drainage switch is arranged in a water tank of the slag conveyor. By means of the system and method, when the difference value of the pressure inside the hearth and the environment pressure reaches the preset value, a pressure switch of the system acts, the water drainage switch is opened automatically, the water surface goes down, the space in the hearth is communicated with the atmospheric environment outside the hearth, the pressure balance is reached, and the hearth is protected effectively.

Description

technical field [0001] The invention relates to a system and method for preventing external explosion of a boiler. Background technique [0002] The solid-state slag removal coal-fired boiler generally adopts a wet slag removal process. A slag removal machine is installed at the bottom of the boiler furnace. A certain water level is maintained in the slag removal machine. The water seal plate at the bottom of the boiler is inserted into the water tank of the slag removal machine to a certain depth. Prevent the cold air from the bottom of the furnace from leaking into the boiler, and isolate the combustion space of the boiler from the open space at the bottom of the furnace. The slag generated by combustion in the furnace falls into the water tank and is cooled rapidly, and then is dragged out of the water surface by the scraper of the slag extractor and transported to the designated position, thus ensuring the continuous and safe operation of the boiler. Its structure is as ...

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Problems solved by technology

[0003] However, in some cases of abnormal combustion, there will be a large pressure change in the combustion space in the furnace, sometimes the pressure in the furnace will reach more than 3000Pa, if the difference between the pressure in the furnace and the ambient pressure is too large Causes damage to the furnace wall, and "explosion" occurs, resulting in severe damage to the equipment

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