CN215112720U

CN215112720U - Device for reducing consumption of fuel gas in combustion of radiant tube

Info

Publication number: CN215112720U
Application number: CN202120606595.0U
Authority: CN
Inventors: 于奎沣; 杨金龙
Original assignee: Tianjin Xintian Steel Cold Rolled Sheet Co ltd
Current assignee: Tianjin Xintian Steel Cold Rolled Sheet Co ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-12-10
Anticipated expiration: 2031-03-25

Abstract

The utility model provides a reduce radiant tube burning gas consumption device, include: the combustion-supporting fan, an oxygen-enriched air collection device, a storage tank of being connected with oxygen-enriched air collection device, the combustion-supporting air pipeline of annealing stove combustor is connected to the storage tank, set up the proportional valve on the combustion-supporting air pipeline of annealing stove combustor, the annealing stove combustor includes the radiant tube, combustion system is connected at the radiant tube both ends, combustion system is close to oxygen-enriched combustion-supporting air inlet one end and sets up the heat exchanger with the radiant tube kneck, combustion system is close to natural gas air inlet one end and sets up the nozzle, the combustion system top is close to the heat exchanger and sets up the exhaust outlet. The utility model utilizes the air separation byproduct as a combustion supporter to participate in the combustion reaction, and the equipment investment is very small; meanwhile, the combustion system is not required to be changed, and only the air-fuel ratio is required to be adjusted; in addition, the amount of air participating in combustion is reduced, and the heat taken away by waste gas is reduced, so that the fuel gas is saved; as the amount of nitrogen brought in by participating in combustion is reduced, the combustion power can be reduced, thereby reducing the emission of nitrogen oxides in the exhaust gas.

Description

Device for reducing consumption of fuel gas in combustion of radiant tube

Technical Field

The utility model relates to a burning technical field, concretely relates to reduce radiant tube burning gas consumption device.

Background

In the product cost constitution, the combustion cost, especially the gas consumption, is significant, but the consumption level cannot be further reduced after the conventional control gas consumption is reduced to a certain degree, and the annealing process needs to use a large amount of nitrogen as protective gas, and after the nitrogen is separated from the air by a conventional nitrogen making unit, the oxygen-enriched air is discharged, so how to save the gas becomes the problem to be solved urgently in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome exist among the prior art not enough, provide a reduce radiant tube burning gas consumption device.

The utility model discloses a realize through following technical scheme: a device for reducing the consumption of radiant tube combustion gas, comprising: a combustion-supporting fan for providing combustion air, an oxygen-enriched air collecting device for collecting oxygen-enriched air in the public auxiliary nitrogen making machine set, a storage tank connected with the oxygen-enriched air collecting device, the storage tank is connected with a combustion-supporting air pipeline of a burner of the annealing furnace, a proportional valve used for adjusting the proportion of the oxygen-enriched air and the combustion-supporting air is arranged on the combustion-supporting air pipeline of the burner of the annealing furnace, the burner of the annealing furnace comprises a radiant tube, two ends of the radiant tube are connected with a combustion system, the combustion system comprises a natural gas inlet and an oxygen-enriched combustion-supporting air inlet, a heat exchanger is arranged at the joint of one end of the combustion system close to the oxygen-enriched combustion-supporting air inlet and the radiant tube, the combustion system is close to one end of the natural gas inlet and is provided with a burner, and the top of the combustion system is close to the heat exchanger and is provided with a waste gas outlet.

Further, the mixing content of the combustion air and the oxygen-enriched air is higher than the oxygen content in the air.

Further, the radiant tube is W-shaped.

The utility model has the advantages that: the utility model utilizes the air separation byproduct as a combustion supporter to participate in the combustion reaction, and the equipment investment is very small; meanwhile, the combustion system is not required to be changed, and only the air-fuel ratio is required to be adjusted; in addition, the amount of air participating in combustion is reduced, and the heat taken away by waste gas is reduced, so that the fuel gas is saved; as the amount of nitrogen brought in by participating in combustion is reduced, the combustion power can be reduced, thereby reducing the emission of nitrogen oxides in the exhaust gas.

Drawings

FIG. 1 is a diagram of oxygen-enriched air being introduced into combustion air in accordance with an embodiment of the present invention;

fig. 2 is a diagram of a radiant tube combustion system for the burner section of fig. 1.

In the figure: 1. a pressure reducing valve; 2. a proportional pressure regulator; 3. a proportional valve; 4. a differential pressure flow meter; 5. a pressure gauge; 6. low-voltage alarm; 7. a filter; 8. a combustion fan; 9. an air line; 10. a radiant tube; 11. a natural gas inlet; 12. an oxygen-enriched combustion-supporting air inlet; 13. a heat exchanger; 14. burning a nozzle; 15. and an exhaust gas outlet.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

In describing the embodiments of the present invention, the view angle of fig. 1 is defined as the view of the oxygen-enriched air accessing combustion air of the embodiments of the present invention. In the description of the embodiments of the present invention, it should be understood that the terms "vertical", "horizontal", "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience of description and simplification of the description of the embodiments of the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the embodiments of the present invention. In the description of the embodiments of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art through specific situations. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating embodiments of the present invention and are not to be construed as limiting the embodiments of the present invention.

The embodiment of the utility model provides a under the prerequisite that does not change existing equipment to public assistance preparation nitrogen gas by-product oxygen boosting air replaces the air to participate in annealing stove nozzle combustion reaction as the combustion improver, under the certain condition of combustion heat production, along with oxygen content promotes among the combustion air, participates in the total air volume of reaction and can reduce, thereby reaches the purpose of practicing thrift the natural gas, can make nitrogen oxide content reduce in the waste gas simultaneously.

As shown in fig. 1, the utility model discloses oxygen-enriched air inserts combustion air picture, the embodiment of the utility model provides a reduce radiant tube burning gas consumption device, include: a combustion-supporting fan for providing combustion air, an oxygen-enriched air collecting device for collecting oxygen-enriched air in the public auxiliary nitrogen making machine set, a storage tank connected with the oxygen-enriched air collecting device, the storage tank is connected with a combustion-supporting air pipeline of a burner of the annealing furnace, a proportional valve used for adjusting the proportion of the oxygen-enriched air and the combustion-supporting air is arranged on the combustion-supporting air pipeline of the burner of the annealing furnace, the burner of the annealing furnace comprises a radiant tube, two ends of the radiant tube are connected with a combustion system, the combustion system comprises a natural gas inlet and an oxygen-enriched combustion-supporting air inlet, a heat exchanger is arranged at the joint of one end of the combustion system close to the oxygen-enriched combustion-supporting air inlet and the radiant tube, the combustion system is close to one end of the natural gas inlet and is provided with a burner, and the top of the combustion system is close to the heat exchanger and is provided with a waste gas outlet. The pressure reducing valve 1 is mainly used for reducing the pressure of the conveyed oxygen-enriched air, and the proportional pressure regulator and the proportional valve are matched for use, so that the flow of the oxygen-enriched air is regulated according to the differential pressure flowmeter, and the content of the oxygen-enriched air in the oxygen air is ensured to be consistent and fixed.

Further, the mixing content of the combustion air and the oxygen-enriched air is higher than the oxygen content in the air. Further, the radiant tube is W-shaped.

Specifically, firstly, impurities in air are filtered through a filter, a combustion fan is used for pumping the air, the air pressure is monitored by the pumped air through a low-pressure alarm device, the stable operation of the whole combustion system can be started when the air pressure reaches a preset value, and the pumped air pressure is ensured to be at a stable value. The oxygen-enriched air is firstly decompressed through a pressure reducing valve, and then the air-fuel ratio is adjusted through a proportional valve, so that the oxygen content in the combustion air is ensured to be at a fixed value. After entering the combustion system, the oxygen-enriched combustion-supporting air firstly passes through the heat exchanger to be heated, then passes through the burner nozzle to be mixed with natural gas, heats the radiant tube and is heated by the furnace chamber.

The actual capacity of the air separation unit at present is calculated, and the capacity of increasing the oxygen-enriched air content of the 6 layers of the annealing furnace of the galvanizing unit from normal 21 percent to about 40 percent can be met. Under the condition of meeting the combustion effect, if the combustion-supporting oxygen amount can not meet all the layers, the layering can be adjusted to different oxygen contents to be respectively controlled. The vertical annealing furnace of the galvanizing unit and the continuous annealing unit is divided into 6 layers, each layer uses a combustion fan to independently provide air for combustion, the on-off mode is adopted to control the burner of each radiant tube, and the gas in the radiant tube is finally cooled through a heat exchanger and discharged from a waste gas outlet. The embodiment of the utility model utilizes the air separation byproduct as a combustion supporter to participate in the combustion reaction, so the equipment investment is very small; meanwhile, the combustion system is not required to be changed, and only the air-fuel ratio is required to be adjusted; in addition, the amount of air participating in combustion is reduced, and the heat taken away by waste gas is reduced, so that the fuel gas is saved; as the amount of nitrogen brought in by participating in combustion is reduced, the combustion power can be reduced, thereby reducing the emission of nitrogen oxides in the exhaust gas.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for reducing the consumption of gas for burning a radiant tube, which is characterized by comprising: a combustion-supporting fan for providing combustion air, an oxygen-enriched air collecting device for collecting oxygen-enriched air in the public auxiliary nitrogen making machine set, a storage tank connected with the oxygen-enriched air collecting device, the storage tank is connected with a combustion-supporting air pipeline of a burner of the annealing furnace, a proportional valve used for adjusting the proportion of the oxygen-enriched air and the combustion-supporting air is arranged on the combustion-supporting air pipeline of the burner of the annealing furnace, the burner of the annealing furnace comprises a radiant tube, two ends of the radiant tube are connected with a combustion system, the combustion system comprises a natural gas inlet and an oxygen-enriched combustion-supporting air inlet, a heat exchanger is arranged at the joint of one end of the combustion system close to the oxygen-enriched combustion-supporting air inlet and the radiant tube, the combustion system is close to one end of the natural gas inlet and is provided with a burner, and the top of the combustion system is close to the heat exchanger and is provided with a waste gas outlet.

2. The device for reducing the consumption of gas by burning a radiant tube as recited in claim 1, wherein the mixing content of the combustion air and the oxygen-enriched air is higher than the oxygen content of the air.

3. The device for reducing the consumption of the combustion gas of the radiant tube as claimed in claim 1, wherein the radiant tube is W-shaped.