A regenerative m-shaped radiant tube unit and its combustion method

Abstract

The invention provides a regenerative M-shaped radiant tube unit and a combustion method thereof. The regenerative M-shaped radiant tube unit includes: a regenerative burner, an M-shaped flame radiant tube, and a regenerative combustion A reversing device; the regenerative burner is connected to the M-shaped flame radiant tube, and the reversing device is connected to the regenerative burner. The regenerative M-shaped radiant tube unit is composed of a whole, which integrates combustion, heat transfer, smoke exhaust and heat storage; the regenerative burner can use high heat such as liquefied gas, natural gas, coke oven gas and light oil. The value of fuel, when working, the air and flue gas need to be reversed but the fuel does not need to be reversed. Through the above method, the regenerative M-shaped radiant tube unit is formed as a whole, which can effectively reduce the flame combustion temperature of the regenerative burner, and reduce NO while saving fuel. x It can improve the uniformity of the wall temperature of the radiant tube, increase the service life of the radiant tube, and improve the heating quality.

Description

technical field [0001] The invention relates to the technical field of industrial heating burners, in particular to a regenerative M-shaped radiant tube unit and a combustion method thereof. Background technique [0002] The flame radiant tube is a heating device that uses the heat generated by the combustion of the gas in the tube to transfer the heat to the heated object in the furnace through the surface of the heated tube in the form of thermal radiation. At present, the radiant tubes used are mainly divided into two categories: flame radiation The thermal efficiency of the flame radiant tube is about twice higher than that of the electric heating radiant tube. Therefore, the flame radiant tube is mainly a common heating device for the controllable atmosphere heat treatment furnace. Food and other industries also have applications. [0003] Flame radiant tubes in the fields of iron and steel, metallurgical industrial furnaces and mechanical heat treatment mainly use gas...

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Problems solved by technology

[0004] In the prior art, regenerative combustion is also used to improve thermal efficiency. Generally, the combustion-supporting air can be preheated to about 800°C. During operation, the fuel spray gun, air, and flue gas are reversed at the same time. When one fuel spray gun sprays fuel, the other The fuel spray gun is closed and no fuel passes through, so it is easy to discharge the remaining fuel in the closed spray gun without fuel passing through, resulting in waste, resulting in unclean combustion, low thermal efficiency, etc., and it is easy to cause burning and coking of the spray gun head, affecting the service life of the spray gun. Moreover, the uniformity of the wall surface temperature of the radiant tube is poor, and the radiant tube burns seriously. At the same time, due to the NO x It will be very high and does not meet the current emission standards for steel and metallurgical industrial furnaces, so it is rarely used effectively in radiant tubes

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