Atmospheric gas radiation heating device

Abstract

The invention discloses an atmospheric gas radiation heating device which comprises a burner, a quartz glass radiant tube and an igniter, wherein the burner comprises a nozzle, an injection tube and a burner head part; the burner head part consists of an inner tube and an outer tube which are concentric, and one end of an annular belt between the inner tube and the outer tube is sealed; the injection tube is communicated with the annular belt; the end of the sealed annular belt of the inner tube is a secondary air inlet, while the other end of the inner tube is provided with an inner flame cover; a corresponding end of the outer tube is provided with an outer flame cover, and a flame hole is formed between the inner flame cover and the outer flame cover; and the inner tube is internally provided with a secondary air conditioning device. The invention has simple structure, convenient mounting, low manufacture and maintenance cost, high burning strength, long service life and large burner load regulation ratio, can meet the requirement of different heating powers to a larger extent and can be widely applied to industrial kilns of the industries of steel, petrochemical industry, machinery, building materials, boilers, waste incineration, and the like.

Description

[0001] technical field [0002] The invention relates to an atmospheric gas radiation heating device, which can be widely used in the heating process and drying process in the fields of mechanical manufacturing and material manufacturing using gas, and can also be used in industrial furnaces that require a protective atmosphere in the iron and steel and mechanical industries. The invention belongs to the technical field of gas combustion and application engineering. [0003] Background technique [0004] A gas radiant tube is a heating device that burns gaseous fuel. Using the gas radiant tube as the heating device is economically reasonable, with high energy utilization efficiency and little environmental pollution. The radiant tube body is mostly made of heat-resistant steel centrifugal casting tube, and some are made of rolled material and high-temperature ceramic material. The air supply mode of the radiant tube burner can be divided into blast type, suction type, suct...

AI Technical Summary

Problems solved by technology

In addition, the metal radiant tube is easily deformed due to the temperature inhomogeneity on the surface of the tube body; and the long-term erosion of the radiant tube by high-temperature flames and gas-air mixed combustion products will cause corrosion of the tube body. These factors all affect the gas radiant tube. Service life and use effect

[0007] (2) The mixing of air / gas in the radiant tube requires electric energy, and the mixing ratio of air / gas is not easy to control

[0008] The conventional radiant tube heats the radiant tube through the high-temperature flue gas after the gas / air is mixed and burned in the combustion chamber by means of forced premixing, which requires a special air supply system and consumes electricity, while the gas / air mixing ratio It needs to be controlled by a special control device, and the load adjustment ratio is very small

[0009] (3) The thermal efficiency of the radiant tube is not high

[0010] The blackness of conventional radiant tubes is low. In order to improve efficiency, the method of brushing radiant paint on the surface of metal tubes is often used to increase the blackness of radiant tubes. After the equipment has been running for a long time, the surface paint will fall off, which will increase production. cost and inconvenience

[0011] (4) High pollutant discharge content

[0012] Since the flame temperature in a conventional radiant tube can reach 1500°C, this will cause NO x A large amount of generation, and the CO emission content is easy to exceed the standard under the condition of improper combustion control

[0013] (5) Inconvenient installation

When any equipment in the integrated structure is damaged, it cannot be replaced and repaired

For the split structure, the connection between the burner and the radiant tube is complicated, and the problem of burner eccentricity often occurs

Because the fuel burns in the limited space of the radiant tube, when the burner is eccentric, the circumferential temperature distribution will be uneven, and the flame will directly wash the tube wall, resulting in excessive local temperature and shortening its service life.

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