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Radiant pipe combustion performance thermal simulation test furnace and method

A combustion performance and radiant tube technology, applied in the direction of combustion method, burner, combustion type, etc., can solve the problem of difficult detection of radiant tube flame combustion state, achieve the effects of reducing emissions, reducing fuel consumption, and improving combustion efficiency

Active Publication Date: 2018-11-16
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a thermal simulation test furnace and method for radiant tube combustion performance, overcome the deficiencies of the prior art, solve the problem that the flame combustion state in the radiant tube is difficult to detect in actual production, improve the temperature uniformity of the wall surface of the radiant tube, and ensure Heating quality of thin strip products

Method used

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  • Radiant pipe combustion performance thermal simulation test furnace and method

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Experimental program
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Effect test

Embodiment 1

[0049] The cold-rolled continuous annealing furnace with an annual output of 500,000 tons uses mixed gas fuel. The W-type radiant tube is installed in a thermal simulation experimental furnace, and the same mixed gas is used as fuel to test the thermal performance of the radiant tube combustion. 40 thermocouples are used to detect the uniformity of the wall temperature of the radiant tube, and to detect the thermal efficiency of the radiant tube, the thermal efficiency of the heat exchanger, and the amount of backflow flue gas. Through thermal performance testing, its air-fuel ratio and suction parameters are optimized. The optimized parameters are applied in actual production, reducing the unit consumption of the continuous annealing furnace from 0.927GJ / t to 0.895GJ / t, which is a reduction of 3.45%, and the NOx emission is reduced from the original 105ppm to 79ppm.

Embodiment 2

[0051] A silicon steel factory uses coke oven gas as the fuel drying furnace, and the U-shaped radiant tube it uses is installed in the thermal simulation experimental furnace. The same coke oven gas is used as the fuel to test the thermal performance of the radiant tube combustion. 30 thermocouples are used to detect the uniformity of the wall temperature of the radiant tube, and the thermal efficiency of the radiant tube and the heat exchanger are also tested. Through the thermal performance test, the thermal parameters are obtained, which are used in the development and manufacture of a new type of radiant tube complete set of high-efficiency and low-nitrogen large reflux flue gas circulation. After the new product is actually applied, the combustion efficiency of the radiant tube is 99.9%, the thermal efficiency of the radiant tube is greater than 70%, and the maximum temperature difference of the radiant tube wall is less than 100°C.

Embodiment 3

[0053] The hot-dip galvanizing continuous annealing furnace with an annual output of 620,000 tons uses mixed gas as fuel. The W-type radiant tube used in it was installed on the thermal simulation experimental furnace, and the same mixed gas was used as fuel to test the combustion performance of the radiant tube heating. 40 thermocouples are used to detect the uniformity of the wall temperature of the radiant tube, and the thermal efficiency of the radiant tube and the heat exchanger are also tested. Through thermal performance testing, the air-fuel ratio combustion parameters are optimized, the heating capacity of the radiant tube in the F2 section is improved, and the production energy efficiency of the hot-dip galvanizing continuous annealing furnace is increased by 1.1%.

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Abstract

The invention relates to a radiant pipe combustion performance thermal simulation test furnace and a method. The test furnace comprises a furnace body, a movable end wall, a radiant pipe, a slideway,a trolley bottom, a heat exchanger, a preheating air pipe and a radiation pipe burner. Compared with the prior art, the radiant pipe combustion performance thermal simulation test furnace and the method has the beneficial effects that the combustion performance of the radiant pipe of a continuous annealing furnace in actual production can be detected, the detection result can be used for optimizing combustion parameters of the continuous annealing furnace combustion control model, the combustion efficiency of the radiant pipe is improved, the efficiency of the heat exchanger is improved, the fuel consumption is reduced, the emission amount of NOx pollutants is reduced, and energy conservation and environmental protection are facilitated; and in addition, in a new product development designprocess of a radiant pipe complete device, the selection of thermal parameters is also a very important experiment method, the heating effect of the new product is improved, and the heating quality of thin strip steels is ensured.

Description

technical field [0001] The invention relates to the technical field of continuous annealing furnace combustion in the iron and steel metallurgy industry, in particular to a thermal simulation experimental furnace and method for combustion performance of a radiant tube heating complete set. Background technique [0002] Radiant tubes are mainly used for heating silicon steel, galvanized, and cold-rolled continuous annealing furnace thin strip steel. The complete set of radiant tube heating includes: main burner, ignition burner, radiant tube, reflux device, radiant tube heat exchanger, and its combustion performance directly affects the heating quality of strip steel in continuous annealing furnace . Commonly used in continuous annealing furnace 2 +H 2 The protective gas is fully sealed. After the gas is burned in the radiant tube, it is difficult to detect and control the thermal performance indicators such as the visible flame length, the temperature change of the high-t...

Claims

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Application Information

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IPC IPC(8): F27B17/02F27D3/12F27D9/00F23D14/12F23D14/46F23D14/66G01M99/00
CPCF23D14/12F23D14/46F23D14/66F27B17/02F27D3/123F27D9/00F27D2009/0018G01M99/002Y02E20/34
Inventor 贾丽娣何天庆马光宇郝博姜大鹏朱维东白世洪昌亮赵爱华高军
Owner ANGANG STEEL CO LTD
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