Multi-layer circuit and multi-burner port flameless ceramic burner

Abstract

The invention relates to a multi-layer circuit and multi-burner port flameless ceramic burner. 1-3 sets of burners are combined and installed at the upper part of a top combustion stove when the multi-layer circuit and multi-burner port flameless ceramic burner is used; an upper gas circuit, a middle air circuit and a lower gas circuit, which are sequentially communicated with an upper gas inlet, a middle air inlet and a lower gas inlet are distributed inside the stove wall from top to bottom; an upper burner port layer and a lower burner port layer are arranged on the inner wall of the stove wall; burner port rings are evenly distributed; gas nozzles are respectively formed in the lower part of the upper gas circuit and the upper part of the lower gas circuit; air nozzles are respectively formed at the top side and the bottom side of the middle air circuit; the air and the gas respectively enter upper and lower mixed channels inside respective circuits through corresponding nozzles, and then eject through the burner ports to burn. Control of the burner is as follows: combustion heat load distribution from an upper burner port layer to a lower burner port layer is sequentially reduced, and the excessive coefficients of combustion air are sequentially increased. The air and gas inlets of the burner and the circuits are interconvertible in position, and the multi-layer circuit and multi-burner port flameless ceramic burner is applicable to various top combustion stoves.

Description

technical field [0001] The present invention relates to a multi-layer loop multi-flame hole flameless ceramic burner, in particular to a multi-loop ceramic burner for flameless combustion of top-fired hot blast stoves used in ironmaking blast furnaces, which belongs to the ceramic burner technology of industrial kilns field. Background technique [0002] The top-fired hot blast stove is also called the non-combustion chamber hot blast stove. This kind of hot blast stove does not have a special combustion chamber, but uses the space on the top of the furnace as a combustion chamber. The combustion chamber is much smaller. Since the top-fired hot blast stove has fully absorbed the technical advantages of other types of hot blast stoves, it has been considered as the development direction of hot blast stove technology. Since the top-fired hot blast stove does not have a special combustion chamber for gas combustion, in such a small space, in order to achieve complete combusti...

AI Technical Summary

Problems solved by technology

In the center of the rotary recirculation zone (in the center of the regenerator), the flue gas flow rate is very low or negative, while at the periphery of the rotary recirculation zone, the air velocity is high, which will affect the heat transfer effect of the regenerator

[0007] The Chinese patent "Multi-Fire Hole Flameless Ceramic Burner" (Patent No. 200510018640.6) discloses a burner that borrows from and improves the Kalukin ceramic burner, and does not form a swirl zone after the fuel and air are sprayed out , to overcome the problem of uneven air distribution in the regenerator caused by the Kalukin type ceramic burner

However, this kind of ceramic burner is arranged in a single layer on the top-fired hot blast stove, and the combustion heat load of the hot blast stove should not be too large, otherwise the design of the combustion nozzle will be large, which will not only affect the structural strength of the fire wall of the combustion chamber, but also affect the combustion of gas Effects and Flame Shapes

[0008] The burner technology disclosed above, with the expansion of the construction scale of the current top-fired hot blast stove, these burner technologies can no longer meet the requirements of the newly built large top-fired hot blast stove, so innovatively develop new burners to adapt to large top-fired hot blast stoves The requirements for combustion-type hot blast stoves have become a top priority

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