Regenerative burner capable of using two fuels

Abstract

The utility model provides a regenerative burner capable of using two fuels. The regenerative burner capable of using the two fuels comprises a regenerative burner box body (1), a coke oven gas burner (2) and a natural gas burner (3), a coke oven gas burner (2) is embedded in the regenerative burner box body (1), and a natural gas burner (3) is embedded in the coke oven gas burner (2). According to the heat accumulating type burner, the high heat value fuel and the low heat value fuel are used, safety production is guaranteed, meanwhile, on-line switching of the two fuels can be achieved, the two fuels can be used in a mixed mode according to different proportions, and the heat accumulating type burner has important significance for stabilizing continuous production of enterprises.

Description

Technical Field

[0001] The utility model relates to a regenerative burner technology used for heating in the field of industrial furnaces, in particular to a regenerative burner capable of using two fuels. Background Art

[0002] At present, the regenerative burners used in domestic gas industrial furnaces are of various types, but they all use a single gas as fuel. High calorific value gas, such as natural gas, has high cost of use, and long-term use is not conducive to reducing costs for enterprises. Medium calorific value gas, such as coke oven gas, is a by-product of other production processes and has a lower cost of use than natural gas. Therefore, the development of a dual-fuel regenerative burner is a problem that technicians in this field are eager to solve. Utility Model Content

[0003] The purpose of the utility model is to solve the problem of single fuel selection for current regenerative burners and propose a regenerative burner that can use two fuels. The regenerative burner is a regenerative burner that uses two fuels with high and low calorific values. While ensuring safe production, it can also realize online switching of the two fuels and can also realize the mixing of the two fuels in different proportions, which is of great significance for stabilizing the continuous production of enterprises.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a regenerative burner that can use two fuels, including a regenerative burner box body, a coke oven gas burner and a natural gas burner; the regenerative burner box body is embedded with a coke oven gas burner, and the coke oven gas burner is embedded with a natural gas burner;

[0005] The main body of the regenerative burner box includes a casting module, a fiber blanket, a central air duct, a central air interface flange, a sealing plate, a first regenerative cavity and a second regenerative cavity;

[0006] The casting module has a first heat storage cavity and a second heat storage cavity arranged in parallel on the left and right sides;

[0007] A central air duct is arranged between the first heat storage cavity and the second heat storage cavity, the side wall of the central air duct is connected to the central air interface flange, and a sealing plate is arranged between the central air duct and the coke oven gas burner;

[0008] The coke oven gas burner includes a coke oven gas cyclone pressurizing plate, a coke oven gas pipeline, a coke oven gas burner mounting plate, a coke oven gas interface flange and a coke oven gas burner sealing plate. A coke oven gas cyclone pressurizing plate is arranged at one end of the coke oven gas pipeline, and a coke oven gas burner sealing plate is arranged at the other end. A coke oven gas burner mounting plate is arranged on the side wall of the coke oven gas pipeline close to the coke oven gas burner sealing plate. The coke oven gas burner is fixed to the heat storage burner housing through the coke oven gas burner mounting plate, and the side wall of the coke oven gas pipeline between the coke oven gas burner sealing plate and the coke oven gas burner mounting plate is connected to the coke oven gas interface flange.

[0009] The natural gas burner includes a burner disc, a bracket, an automatic ignition electrode, a flame detection electrode, a natural gas pipeline, a natural gas burner mounting plate and a natural gas interface flange. A burner disc is arranged at one end of the natural gas pipeline, and a natural gas interface flange is arranged at the other end. A natural gas burner mounting plate is arranged on the side wall of the natural gas pipeline near the natural gas interface flange. The natural gas burner and the coke oven gas burner are fixed by the natural gas burner mounting plate and the coke oven gas burner sealing plate; the automatic ignition electrode is fixed to the side wall of the natural gas pipeline through a bracket, and the flame detection electrode is fixed to the side wall of the natural gas pipeline through a bracket. The natural gas burner is provided with an automatic ignition electrode and a flame detection electrode to realize automatic ignition and flame detection of the burner, improve ignition efficiency and ensure safe production.

[0010] Furthermore, the casting module is formed by casting a casting material in the shell of the regenerative burner; the casting material is a low-cement casting material, which has the characteristics of low porosity, good stability and high strength. Different from other casting methods, low-cement casting can be carried out at room temperature, is simple to operate and has low cost.

[0011] Furthermore, a refractory fiber blanket is provided between the casting module and the inner wall of the thermal storage burner shell. Before casting the casting material, a layer of refractory fiber blanket is installed on the inner side wall of the thermal storage burner shell, between the shell and the cavity. The refractory fiber blanket has a good thermal insulation effect. Under the condition of the same thickness, the thermal insulation effect is better than that of the casting material product. After casting, the casting material, the refractory fiber blanket and the thermal storage burner shell are integrally formed, and the structure is stable and durable.

[0012] Furthermore, a row of firebricks are installed inside the first heat storage cavity and the second heat storage cavity. The main function of the firebricks is to form a stable fluid structure for the medium in the cavity through the evenly distributed through holes on the firebricks, which is helpful for heat exchange and can limit the collapse of the honeycomb structure caused by gas pressure impact in the cavity.

[0013] Furthermore, a plurality of honeycombs are sequentially installed behind the fire-blocking bricks to form a set of heat storage chambers, wherein the honeycomb body is in the shape of a small cube, and the cross section is a plurality of regular hexagonal holes arranged sequentially, and each hole is parallel to each other, which effectively improves the heat exchange efficiency.

[0014] Further, the air nozzles (first air nozzles, second air nozzles) of the first heat storage cavity and the second heat storage cavity are provided with double or multiple rows of air jet holes, and the air jet holes are at an angle of 10-20 degrees to the center line of the heat storage burner that can use two fuels, preferably at an angle of 15 degrees, so that a mixture of air and gas can be formed on the center extension line of the heat storage burner that can use two fuels of the present invention, so as to ensure that the flame is always burning in the center of the burner body;

[0015] Furthermore, the coke oven gas burner has the advantage that the coke oven gas cyclone booster plate is provided with two circles of small holes for increasing the coke oven gas ejection velocity, and the small holes are arranged in a staggered manner so that the coke oven gas is evenly mixed with the air when ejected and burns fully.

[0016] Furthermore, the advantage of the natural gas burner is that the natural gas burner disc is close to a hemispherical structure, and a plurality of small holes of equal size are arranged on the hemispherical surface, which can effectively increase the gas flow rate and evenly disperse and spray it, so as to make the combustion more complete.

[0017] The utility model can use two kinds of fuel regenerative burner and industrial furnace working principle:

[0018] When in working state one, the high-temperature flue gas in the furnace enters the first heat storage cavity 16 from the first air inlet (i.e., the first smoke exhaust inlet). After the high-temperature flue gas exchanges heat with the heat storage body in the first cavity, the temperature of the heat storage body increases, and the flue gas temperature decreases, and is discharged from the first combustion-supporting air interface. At the same time, the combustion-supporting air enters the second heat storage cavity 17 from the second combustion-supporting air interface. The heat storage body in the second heat storage cavity 17 exchanges heat with the combustion air, and the temperature of the heat storage body decreases. After the temperature of the combustion air increases, it is ejected through the air nozzle.

[0019] When in working state two, the high-temperature flue gas in the furnace enters the second heat storage cavity 17 from the second air inlet (i.e., the second smoke exhaust inlet). After the high-temperature flue gas exchanges heat with the heat storage body in the second heat storage cavity 17, the temperature of the heat storage body increases, and the flue gas temperature decreases, and is discharged from the second combustion-supporting air interface. At the same time, the combustion-supporting air enters the first heat storage cavity 16 from the first combustion-supporting air interface. The heat storage body in the first heat storage cavity 16 exchanges heat with the combustion air, and the temperature of the heat storage body decreases. After the temperature of the combustion air increases, it is ejected through the air nozzle.

[0020] Working state 1 and working state 2 are switched every several seconds (for example, thirty seconds), which can effectively preheat the combustion air, save fuel, reduce the temperature of flue gas emissions, and reasonably utilize waste heat.

[0021] When two fuels are used at the same time, the amount of different fuels entering the furnace is controlled by the flow regulating valve and flow meter installed on the gas pipeline respectively; the flow meter sends the collected flow data to the upper computer system, converts the air flow coefficient required for combustion through the calorific value of the two fuels, and feeds back to the flow meter and flow regulating valve on the air pipeline. The valve adjusts and controls the amount of combustion air sent to the furnace, so as to achieve the purpose of complete combustion of different fuels in the furnace at the same time.

[0022] Another object of the utility model is to disclose an industrial furnace, which adopts the above-mentioned regenerative burner capable of using two kinds of fuels.

[0023] The utility model can use two kinds of fuel regenerative burner and industrial furnace, compared with the prior art has the following advantages:

[0024] 1) The utility model heat storage burner can realize combustion after preheating the combustion air, which can effectively save energy and reduce emissions.

[0025] 2) The utility model heat storage burner is provided with two left and right combustion air heat storage chambers, and the two sides are alternately exhausting smoke and storing heat.

[0026] 3) The utility model heat storage burner is a heat storage burner that uses two kinds of fuels with high and low calorific values. While ensuring safe production, it can also realize online switching of the two fuels, and can also realize the mixing of the two fuels in different proportions. It is controlled by the upper computer, which is of great significance for stabilizing the continuous production of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the front view of the regenerative burner that can use two kinds of fuels;

[0028] Figure 2 The right side view of the regenerative burner which can use two kinds of fuels;

[0029] Figure 3 A top view of a regenerative burner that can use two types of fuel;

[0030] Figure 4 It is a top view of a cross-sectional view of a regenerative burner that can use two types of fuels;

[0031] Figure 5 for Figure 4 AA direction diagram

[0032] Figure 6 for Figure 4 BB direction schematic diagram;

[0033] Figure 7 This is a schematic diagram of the coke oven gas burner structure;

[0034] Figure 8This is a schematic diagram of the structure of the coke oven gas cyclone booster plate;

[0035] Fig. 9 This is a schematic diagram of the natural gas burner structure. DETAILED DESCRIPTION

[0036] The present invention is further described below with reference to the embodiments:

[0037] Example 1

[0038] This embodiment discloses a regenerative burner that can use two kinds of fuels, such as Figure 1-9 As shown, it comprises a regenerative burner housing body 1, a coke oven gas burner 2 and a natural gas burner 3; the regenerative burner housing body 1 is embedded with the coke oven gas burner 2, and the coke oven gas burner 2 is embedded with the natural gas burner 3;

[0039] The regenerative burner box body 1 comprises a casting module 11, a fiber blanket 12, a central air duct 13, a central air interface flange 14, a sealing plate 15, a first regenerative cavity 16 and a second regenerative cavity 17;

[0040] The casting module 11 is formed by casting a casting material in a heat storage burner shell 110; the casting material is a low-cement casting material, which has the characteristics of low porosity, good stability and high strength. Unlike other casting methods, low-cement casting can be carried out at room temperature, which is simple to operate and low in cost. The casting module 11 is provided with a first heat storage cavity 16 and a second heat storage cavity 17 in parallel on the left and right; a refractory fiber blanket 12 is provided between the casting module 11 and the inner wall of the heat storage burner shell. Before the casting material is cast, a layer of refractory fiber blanket is installed on the inner side wall of the heat storage burner shell, between the shell and the cavity. The refractory fiber blanket has a good thermal insulation effect. Under the condition of the same thickness, the thermal insulation effect is better than that of casting material products. After casting, the casting material, the refractory fiber blanket 12 and the heat storage burner shell are integrally formed, and the structure is stable and durable. A row of fire-blocking bricks 18 are installed inside the first heat storage cavity 16 and the second heat storage cavity 17. The main function of the fire-blocking bricks is to form a stable fluid structure for the medium in the cavity through the evenly distributed through holes on the fire-blocking bricks, which is helpful for heat exchange and can limit the collapse of the honeycomb structure in the cavity due to the impact of gas pressure. After the fire-blocking bricks, a plurality of honeycombs 19 are installed in sequence to form a set of heat storage cavities (see Figure 6 The honeycomb body 19 is closely attached to the back of the fire-blocking brick 18). The honeycomb body has a small cube shape, and a cross section of a plurality of regular hexagonal holes arranged in sequence, each hole being parallel to each other, which effectively improves the heat exchange efficiency.

[0041] A central air duct 13 is arranged between the first heat storage cavity 16 and the second heat storage cavity 17, the side wall of the central air duct 13 is connected with the central air interface flange 14, a sealing plate 15 is arranged between the central air duct 13 and the coke oven gas burner 2, and the inner wall of the central air duct 13, the outer wall of the coke oven gas pipeline 22 and the central air interface flange 14 form a central air channel; the air nozzles (first air nozzles and second air nozzles) of the first heat storage cavity 16 and the second heat storage cavity 17 are provided with double or multiple rows of jet holes, and the jet holes are at an angle of 15 degrees with the heat storage burner that can use two fuels, so that a mixture of air and gas can be formed on the central extension line of the heat storage burner that can use two fuels in the present invention, so as to ensure that the flame is always burning in the center of the burner body;

[0042] The coke oven gas burner 2 is arranged in the central air duct 13, and the coke oven gas burner 2 includes a coke oven gas cyclone pressurizing plate 21, a coke oven gas pipeline 22, a coke oven gas burner mounting plate 23, a coke oven gas interface flange 24 and a coke oven gas burner sealing plate 25. The coke oven gas pipeline 22 is provided with a coke oven gas cyclone pressurizing plate 21 at one end and a coke oven gas burner sealing plate 25 at the other end; the coke oven gas pipeline 22 is close to the coke oven gas burner A coke oven gas burner mounting plate 23 is arranged on the side wall of the nozzle sealing plate 25, and the coke oven gas burner 2 is fixed to the heat storage burner housing through the coke oven gas burner mounting plate 23. The side wall of the coke oven gas pipeline 22 between the coke oven gas burner sealing plate 25 and the coke oven gas burner mounting plate 23 is connected to the coke oven gas interface flange 24, and the inner wall of the coke oven gas pipeline 22, the outer wall of the natural gas pipeline 35 and the coke oven gas interface flange 24 form a coke oven gas channel. The advantage of the coke oven gas burner 2 is that the coke oven gas cyclone booster plate 21 is provided with two circles of small holes to increase the coke oven gas ejection velocity, and the small holes are arranged in a staggered manner, so that the coke oven gas is evenly mixed with the air when ejected, and the combustion is sufficient;

[0043] The natural gas burner 3 is inserted into the coke oven gas pipeline 22, and the natural gas burner 3 includes a burner disc 31, a first bracket 32, an automatic ignition electrode 33, a second bracket 34, a flame detection electrode 36, a natural gas pipeline 35, a natural gas burner mounting plate 37 and a natural gas interface flange 38. The burner disc 31 is arranged at one end of the natural gas pipeline 35, and the natural gas interface flange 38 is arranged at the other end. The natural gas burner mounting plate 37 is arranged on the side wall of the natural gas pipeline 35 near the natural gas interface flange 38. The natural gas burner 3 and the coke oven gas burner 2 are fixed to the coke oven gas burner sealing plate 25 through the natural gas burner mounting plate 37; the automatic ignition electrode 33 is fixed to the side wall of the natural gas pipeline 35 through the first bracket 32 ​​and the second bracket 34, and the flame detection electrode 36 is fixed to the side wall of the natural gas pipeline through the bracket. The advantages of the natural gas burner are that the natural gas burner disc 31 is provided, which is close to a hemispherical structure, and the hemispherical surface is provided with small holes of equal size, which can effectively increase the gas flow rate and evenly disperse and spray, so as to make the combustion more complete. The automatic ignition electrode 33 and the flame detection electrode 34 are provided to realize the automatic ignition and flame detection of the burner, improve the ignition efficiency and ensure safe production.

[0044] Example 2

[0045] This embodiment discloses an industrial furnace, which adopts the regenerative burner capable of using two fuels as described in Embodiment 1.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A regenerative burner capable of using two fuels, characterized in that: It comprises a regenerative burner box body (1), a coke oven gas burner (2) and a natural gas burner (3); the regenerative burner box body (1) is embedded with the coke oven gas burner (2), and the natural gas burner (3) is embedded with the coke oven gas burner (2); The regenerative burner box body (1) comprises a casting module (11), a central air duct (13), a central air interface flange (14), a sealing plate (15), a first regenerative cavity (16) and a second regenerative cavity (17); the first regenerative cavity (16) and the second regenerative cavity (17) are arranged in parallel on the left and right sides of the casting module (11); a central air duct (13) is arranged between the first regenerative cavity (16) and the second regenerative cavity (17); a side wall of the central air duct (13) is connected to the central air interface flange (14); and a sealing plate (15) is arranged between the central air duct (13) and the coke oven gas burner (2); The coke oven gas burner (2) comprises a coke oven gas cyclone pressurizing plate (21), a coke oven gas pipeline (22), a coke oven gas burner mounting plate (23), a coke oven gas interface flange (24) and a coke oven gas burner sealing plate (25); one end of the coke oven gas pipeline (22) is provided with the coke oven gas cyclone pressurizing plate (21), and the other end is provided with the coke oven gas burner sealing plate (25); a coke oven gas burner mounting plate (23) is provided on a side wall of the coke oven gas pipeline (22) close to the coke oven gas burner sealing plate (25); and the side wall of the coke oven gas pipeline (22) between the coke oven gas burner sealing plate (25) and the coke oven gas burner mounting plate (23) is connected to the coke oven gas interface flange (24); The natural gas burner (3) comprises a burner disc (31), a bracket, an automatic ignition electrode (33), a flame detection electrode (36), a natural gas pipeline (35), a natural gas burner mounting plate (37) and a natural gas interface flange (38); the burner disc (31) is arranged at one end of the natural gas pipeline (35), and the natural gas interface flange (38) is arranged at the other end; the natural gas burner mounting plate (37) is arranged on the side wall of the natural gas pipeline (35) close to the natural gas interface flange (38); the automatic ignition electrode (33) is fixed to the side wall of the natural gas pipeline (35) by means of a bracket, and the flame detection electrode (36) is fixed to the side wall of the natural gas pipeline by means of a bracket.

2. The regenerative burner capable of using two fuels according to claim 1, characterized in that: A refractory fiber blanket (12) is arranged between the casting module (11) and the inner wall of the heat storage burner shell.

3. The regenerative burner capable of using two fuels according to claim 1, characterized in that: A row of fire-blocking bricks (18) is installed inside the first heat storage cavity (16) and the second heat storage cavity (17).

4. The regenerative burner capable of using two fuels according to claim 1, characterized in that: Several honeycomb bodies (19) are installed in sequence after the fire-blocking bricks.

5. The regenerative burner capable of using two fuels according to claim 1, characterized in that: The air nozzles of the first heat storage cavity (16) and the second heat storage cavity (17) are provided with double or multiple rows of air jet holes, and the air jet holes form an angle of 10-20 degrees with the center line of the heat storage burner that can use two kinds of fuels.

6. The regenerative burner capable of using two fuels according to claim 1, characterized in that: The coke oven gas cyclone pressure boosting plate (21) is provided with two circles of small holes for increasing the ejection velocity of the coke oven gas, and the small holes are arranged in a staggered manner.

7. The regenerative burner capable of using two fuels according to claim 1, characterized in that: The natural gas burner disc (31) is close to a hemispherical structure, and a plurality of small holes of equal size are arranged on the hemispherical surface.

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