Liquid deslagging cyclone furnace with three-section type secondary air control valve

Abstract

The invention discloses a liquid deslagging cyclone furnace with a three-section type secondary air control valve, which comprises a cyclone cylinder, a combustor, a cyclone furnace outlet and a secondary air channel, and the area of the secondary air channel exceeding the top of the cyclone furnace is set as an air regulation area. Two vertical partition plates are arranged inwards from the secondary air inlet to divide the air adjusting area into three independent and non-circulating sections, namely a first section, a second section and a third section which are arranged side by side; a movable secondary air control door is arranged in each section, and the first secondary air control door, the second secondary air control door and the third secondary air control door independently control opening / closing of the secondary air duct and the opening degree of the secondary air duct through an electronic control unit. Therefore, the air quantity of the secondary air entering the furnace at the different air duct inlets is adjusted, the distribution of the secondary air in different areas in the furnace is controlled, mixing and combustion of coal particles and the secondary air are more sufficient, and the overall combustion temperature in the furnace is increased.

Description

technical field [0001] The invention relates to the technical field of liquid slagging furnaces, in particular to a liquid slagging cyclone furnace with a three-stage secondary air control door. Background technique [0002] The cyclone furnace is a liquid slagging furnace. Compared with the solid slagging coal-fired boilers commonly used in China, its biggest advantage is that it can burn low-melting ash coal. Due to the sodium content of this coal, when a conventional coal-fired boiler uses this coal, the high temperature environment in the furnace will cause serious slagging and contamination of the heating surface. Cyclone furnaces have been widely used in the United States, and there are currently about 500 cyclone furnaces in operation. Since most of the ash in the cyclone furnace will be discharged as liquid slag, the amount of fly ash entering the furnace is greatly reduced, thereby greatly reducing the problem of contamination of the heating surface. Therefore, th...

AI Technical Summary

Problems solved by technology

If the combustion temperature cannot be kept high enough in the furnace, the molten slag cannot maintain a flowing state, resulting in the clogging of the slag outlet, the ash cannot be discharged, and a large amount of ash will gradually accumulate in the furnace, seriously affecting the normal operation of the boiler and resulting in CO emissions from the boiler The content of unburned carbon in the ash and slag increased significantly, and the furnace had to be shut down for treatment

Images