CN201121890Y - Low nitrogen oxide wall-attached energy-saving and environmental protection graded burner - Google Patents

Abstract

The utility model discloses a low-nitrogen oxide wall-attached energy-saving and environment-friendly graded burner, which comprises a combustion channel composed of flue bricks (1), a sound-absorbing plate (2) and a high-temperature heat-resistant fiber lining (3). Insulation inner tube and burner body (4), long light (7), gas gun (6), air duct is set in burner body (4), air inlet is set on burner side, gas gun (6) is two The lower part of the gas gun is located in the burner body (4), and the upper part is located in the combustion channel. The two rows of gas guns are arranged in a ladder shape, that is, the outlets of the two rows of gas guns are not at the same height. The utility model has a large operating elastic range, which can reach 10:1, and the double-row gas guns can be controlled separately. It can be burned separately or combined. Greatly improves the operating flexibility of the burner. To meet the needs of large changes in the load of the heating furnace of the hydrogenation unit.

Description

Low nitrogen oxide wall-attached energy-saving and environmental protection graded burner

technical field

The utility model belongs to a burner, and mainly relates to an energy-saving and environment-friendly graded burner attached to a wall with low nitrogen oxides.

Background technique

At present, in order to meet the low-load operation of the heating furnace device, the burner mostly adopts online replacement of small energy gas guns. Not only is the labor intensity high, but it also affects the balanced operation of the heating furnace. Especially when the operating pressure of the furnace is positive, the gas gun cannot be replaced online. The operating flexibility range of traditional conventional gas burners is small, and the maximum can only reach 5:1. Therefore, the traditional burner cannot realize the low-load stable operation of the heating furnace in the initial stage of operation. In addition, traditional gas burners generally use primary air supply, fuel gas and combustion-supporting air are mixed unevenly, the flame burns violently in the combustion channel, and a high-temperature zone is easily generated at the exit of the fire channel bricks, resulting in a large amount of thermodynamic nitrogen oxides produced by combustion, which is harmful to the atmospheric environment. create pollution.

Contents of the invention

The purpose of the utility model is to provide a high-efficiency, energy-saving and environment-friendly low-nitrogen oxide wall-attached energy-saving and environment-friendly graded burner. It can improve the operating flexibility of the burner and meet the demand for large changes in the load of the heating furnace of the hydrogenation unit.

The purpose of this utility model can be achieved by adopting the following technical solutions: a combustion channel composed of special-shaped flue bricks; The air duct is set inside, and the air inlet is set on one side of the burner; two rows of gas guns are set, the lower part of the gas gun is located in the burner body, and the upper part is located in the combustion channel, and the two rows of gas guns are arranged in steps, that is, two rows of gas discharge Exits are not at the same height.

Each of the two rows of gas guns is composed of three gas guns, the three gas guns have the same height, and the bottoms of the three gas guns in each row are connected and connected to the air intake pipe.

The two rows of gas guns are set in two separate combustion areas separated by refractory bricks, one row is placed in the combustion channel close to the furnace wall; the other row is placed in the refractory bricks, the nozzles are higher than the refractory bricks, The slope above blocks the outside of the fire path.

The utility model has a large operating elastic range, which can reach 10:1, and the double-row gas guns can be controlled separately. It can be burned separately or combined. Greatly improves the operating flexibility of the burner. To meet the needs of large changes in the load of the heating furnace of the hydrogenation unit. The utility model is installed on the furnace bottom of the heating furnace, adopts the step-by-step graded combustion technology, the flame rises against the furnace wall, first heats the furnace wall to become a uniform hot wall carrier, and then radiates heat to the furnace tube. The heat radiation of the furnace tube is more uniform, thereby avoiding local overheating and coking of the medium in the tube, and improving the service life of the furnace tube and the thermal efficiency of the heating furnace. At the same time, the highest flame temperature is reduced, and the generation of NOx is reduced, thereby achieving the purpose of reducing thermodynamic nitrogen oxides; the utility model adopts special-shaped refractory bricks, and the air distribution channel and diffusion channel formed by special-shaped refractory bricks have a great impact on the length, rigidity, The shape is well controlled to ensure that the flame licks the wall, and the combustion air and gas are fully and evenly mixed to ensure that the fuel can be fully burned at a low excess air coefficient; the utility model is different from the traditional flat flame attached to the wall. The biggest difference of the gas gun is that it adopts multiple heads and graded form, which can effectively control

The width and height of the flame, and the combustion of the gas mixed with the combustion air in stages. The technology of the utility model adopts the stepped combustion technology to achieve the purpose of integration of high efficiency, energy saving and environmental protection.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model.

Accompanying drawing 2 is the B-B view of Fig. 1.

As shown in the figure: 1. Refractory bricks, 2. Noise-absorbing panels, 3. Lining, 4. Burner body, 5. Air regulating butterfly valve, 6. Gas gun, 8. Furnace wall.

Detailed ways

In conjunction with the accompanying drawings, the specific embodiments of the utility model are described.

As shown in Figures 1, 2, and 3: the combustion channel composed of fire bricks 1; the sound-absorbing and heat-preserving inner cylinder composed of the sound-absorbing board and the high-temperature heat-resistant fiber lining 3, and the burner body 4, the long light, the combustion channel and the burner The bodies 4 are connected by flanges. An air duct is set in the burner body 4, an air inlet is set on one side of the burner, and an air regulating butterfly valve 5 is installed in the air inlet; two rows of gas guns 6 are set, the lower part of the gas gun 6 is located in the burner body 4, and the upper part is located in the combustion channel , two rows of gas guns 6 are arranged in steps, that is, the outlets of the two rows of gas guns are not at the same height, and one row of gas guns is higher than the other row of gas guns. Each row in the two rows of gas guns is composed of three gas guns 6, and the height of the three gas guns 6 in each row is consistent, and the bottom of the three gas guns in each row is connected and connected with the air intake pipe. Two rows of gas guns are set in two separate combustion areas separated by refractory bricks 1, one row is placed in the combustion channel close to the furnace wall, and the other row is placed in the refractory bricks. The nozzles are higher than the refractory bricks and placed on the refractory bricks Set up a ramp that keeps the nozzles off the outside of the fire path. When the gas gun in the combustion channel is mixed with the combustion air, the outer gas gun sprays the gas into the high-temperature flue gas along the slope. On the one hand, this part of the gas is preheated, on the other hand, the temperature of the combustion flame is reduced, and the thermodynamic nitrogen oxidation is reduced. quantity. Under the unique air distribution of refractory bricks, it is mixed with combustion air in stages, among which three gas guns spray gas at a certain angle to mix with combustion air in advance, and the other three gas guns spray gas at a certain angle to mix with combustion mixture, further reducing the local combustion temperature , to reduce the generation of NOx, and the combustion flame is attached to the furnace wall in a flat shape for combustion.

Claims (3)

1. low NOx attached wall energy-conserving and environment-protective fractional combustion device, comprise that noise elimination that fire trough, acoustical panel (2) and high-temperature heat-resistance fiber liner (3) that quarl (1) constitutes are formed is incubated inner core and burner body (4), altar lamp, gas gun (6), in burner body (4), the air channel is set, in burner one side air inlet is set, it is characterized in that: gas gun (6) is two rows, the gas gun bottom is positioned at burner body (4), top is positioned at fire trough, the stepped arrangement of two gas-removing rifles, promptly the outlet of two gas-removing rifles is not at sustained height.

2. low NOx attached wall energy-conserving and environment-protective fractional combustion device according to claim 1, it is characterized in that: each row in the two gas-removing rifles is made up of three gas guns, the height unanimity of three gas guns of each row, three gas gun bottoms of each row are communicated with and are connected with air inlet pipe.

3. low NOx attached wall energy-conserving and environment-protective fractional combustion device according to claim 1, it is characterized in that: described two gas-removing rifles are arranged on two independent combustion zones that separated by refractory brick (1), and a row places in the fire trough of furnace wall; Another row places in the refractory brick (1), and its shower nozzle exceeds refractory brick, and is provided with one with the slope of shower nozzle retaining in the quirk outside on refractory brick.

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