Directional purging system and method

Abstract

The invention relates to a directional purging system and method. The directional purging system comprises a reversing valve and a purging device, wherein the reversing valve comprises a gas connecting pipe orifice, a smoke connecting pipe orifice and a burner front pipe joint; the purging device comprises a purging joint and a purging pipe connected in sequence; and the purging joint is connectedto a valve body of the reversing valve, and communicates with the burner front pipe joint. The method comprises the following steps: before the reversing valve enables a burner front pipe to enter asmoke discharge state from gas input, the purging device is started; purging gas is introduced in the purging device to purge the burner front pipe; and when purging is finished, the reversing valve actuates a reversing action, so that the burner front pipe is changed to the smoke discharge state. Residual gas in pipes at each time of purging can be purged into a hearth, so that the CO content inthe smoke is greatly reduced, and the purposes of fuel saving and environmental protection are achieved.

Description

technical field [0001] The invention relates to the technical field of regenerative combustion, in particular to a reversing purge system and method for a regenerative combustion device. Background technique [0002] The regenerative combustion technology alternately switches the air or gas fuel and the flue gas through the reversing device, so that it flows through the heat storage body, which can recover the sensible heat of the high-temperature flue gas to the greatest extent, and the exhaust gas temperature can be reduced below 180 °C , and the combustion-supporting medium or gas fuel can be preheated to above 1000°C to form a new type of flame that is different from the traditional flame, and the temperature distribution in the furnace can be made more uniform by reversing the combustion. [0003] The regenerative burner is a burner with a waste heat recovery device in the regenerator, which is used in pairs to achieve periodic combustion through reversing. One furnace...

AI Technical Summary

Problems solved by technology

This part of the gas does not participate in the combustion, which not only causes energy waste, but also brings huge pressure on environmental protection because of the CO component in the gas.

[0007] Therefore, for each reversing, the gaseous fuel in the pipeline from the burner to the reversing device will be discharged out of the furnace together with the flue gas, and the CO component in the gas will be discharged into the atmosphere. Due to the huge pressure on environmental protection, it is necessary to invent a device and method that prevents the fuel gas in the reversing pipeline from being discharged into the flue gas

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