Burner and recycled asphalt stirring system

Abstract

The utility model belongs to the technical field of asphalt regeneration, and relates to a combustor and a regenerated asphalt stirring system. The combustor comprises a fan, an inner head cover, a flame stabilizing disc, a fuel pipeline and an air duct. The regenerated asphalt stirring system comprises a primary roller, a regeneration roller, a regeneration flue and a combustor. According to the combustor and the regenerated asphalt stirring system, the asphalt flue gas treatment efficiency is high, the heat consumption of the original roller is reduced, and the heat loss of a part of the combustor is reduced. And the regenerated asphalt flue gas is mixed with the air of the fan, so that the combustor is in a low-oxygen combustion condition, and the generation and emission of nitrogen oxides are favorably reduced. Asphalt smoke can participate in combustion to the maximum extent, meanwhile, the asphalt smoke is evenly distributed on the periphery of the combustor through the annular air duct, and the problem that single-side jet flow of the asphalt smoke affects flame partial combustion is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt regeneration and relates to a burner and a regenerated asphalt stirring system. Background Art

[0002] Recycled asphalt mixing plant is a kind of production equipment that mixes the treated old asphalt mixture with regeneration agent, new asphalt material, new aggregate, etc. in a certain proportion to form recycled asphalt mixture. The production process of recycled asphalt mixture generates a large amount of high-temperature flue gas at the regeneration drum, so how to utilize the high-temperature flue gas is an urgent problem that equipment manufacturers need to solve.

[0003] To solve the above problems, the invention patent application with application number CN202311210824.7 discloses a continuous production equipment and production process of recycled asphalt mixture, including a drying and heating drum feed port installed on one side of the belt conveyor and used for drying and heating aggregates; a burner is connected to the side away from the drying and heating drum feed port; a hot flue gas duct is connected to the drying and heating drum and used for hot gas extraction; the new and old material mixed heating drum is connected to the discharge port of the drying and heating drum through a guide pipe, and is connected to the hot flue gas duct; a continuous belt scale is provided under the RAP hopper and is used to weigh the RAP for transportation, and after transportation, it is introduced into the new and old material mixed heating drum through a belt conveyor; the drum driving parts are respectively arranged on the drying and heating drum and the new and old material mixed heating drum; and a continuous mixer is installed at the discharge port of the new and old material mixed heating drum. This kind of continuous production equipment of recycled asphalt mixture introduces the heat discharged by the drying and heating drum into the new and old material mixed heating drum through the hot flue gas duct, so that the new and old material mixed heating drum can heat the internal materials without the heating of the burner. Although the cost of the structure is low, the asphalt fume is not able to be completely treated by passing the asphalt fume directly into the mixed heating drum of new and old materials. The asphalt fume has certain viscosity and corrosiveness, which can easily cause corrosion to the equipment and shorten its service life. In addition, the asphalt fume contains substances that are harmful to the environment and human body. This form of direct use of the fume can easily cause the fume to leak, posing a safety hazard. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the utility model provides a burner and a regenerated asphalt mixing system, and the technical solutions adopted are as follows:

[0005] A burner includes a fan, an inner head cover, a flame stabilizing disk, and a fuel pipeline, wherein the fan is connected to the inner head cover, the inner head cover is arranged outside the flame stabilizing disk, the flame stabilizing disk is connected to the fuel pipeline, and also includes a wind tube including an air inlet, an air outlet, and an annular air duct, one end face of the wind tube is connected to the fan, and the other end face is provided with an annular air duct, the inner head cover is arranged in the annular air duct, the air inlet is connected to the annular air duct, and the air outlet is arranged on the annular air duct.

[0006] Furthermore, the air inlet is arranged in the tangential direction of the annular air duct.

[0007] Furthermore, the annular air duct includes an inner cavity plate and an outer cavity plate, the inner cavity plate and the outer cavity plate are respectively connected to the air cylinder, and the inner cavity plate and the outer cavity plate form an air duct groove.

[0008] Furthermore, it also includes a plurality of swirl blades, which are arranged in the annular air duct and are used to form a swirl in the wind discharged toward the air outlet through the annular air duct.

[0009] Furthermore, it also includes a plurality of nozzles, wherein the nozzle includes an air duct and a nozzle, wherein one end of the air duct is connected to the annular air duct, and the other end extends into the inner head cover, and the nozzle is arranged at the end of the air duct extending into the head cover.

[0010] Furthermore, the nozzles include multiple rows, and the air ducts of the multiple rows of nozzles have different lengths.

[0011] A regenerated asphalt mixing system includes an original drum, a regenerated drum, a regeneration flue, and a burner. The burner is arranged at one end of the original drum. One end of the regeneration flue is connected to the regeneration drum, and the other end is connected to the air inlet of the burner wind tube, which is used to introduce the smoke in the regeneration drum into the annular air duct.

[0012] Furthermore, it also includes a primary flue and a dust collector. One end of the primary flue is connected to the primary drum, and the other end is connected to the dust collector, so as to introduce the flue gas in the primary drum into the dust collector.

[0013] Furthermore, the regeneration flue includes a regeneration primary flue, a regeneration secondary flue and an induced draft fan, the regeneration primary flue is connected to the regeneration drum, the regeneration secondary flue is connected to the burner, and the regeneration primary flue is connected to the regeneration secondary flue through the induced draft fan.

[0014] Furthermore, it also includes a regeneration third-level flue, one end of which is connected to the regeneration second-level flue, and the other end is connected to the dust collector, so as to adjust part of the flue gas in the regeneration drum to be introduced into the dust collector.

[0015] From the above description of the utility model, it can be seen that compared with the prior art, the regenerated asphalt mixing system and burner of the utility model have high efficiency in treating asphalt smoke, reduce the heat consumption of the original drum, and reduce the heat loss of a part of the burner. The regenerated asphalt smoke is mixed with the fan air, so that the burner is in a low-oxygen combustion condition, which is conducive to reducing the generation and emission of nitrogen oxides. The asphalt smoke can participate in the combustion to the maximum extent, and at the same time, the asphalt smoke is evenly distributed around the burner through the annular air duct, avoiding the problem of the unilateral jet of asphalt smoke affecting the flame burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a burner structure is provided for a specific implementation;

[0017] Figure 2 A schematic diagram of the structure of a burner annular air duct is provided for a specific implementation;

[0018] Figure 3 A main diagram of a burner annular air duct is specifically implemented;

[0019] Figure 4 It is a schematic diagram of a regenerated asphalt mixing system in a specific embodiment 1;

[0020] Figure 5 For the specific implementation of the second burner structure schematic diagram;

[0021] Figure 6 It is a schematic diagram of the structure of the annular air duct of the second burner for specific implementation;

[0022] Figure 7 It is the main diagram for the specific implementation of the two burner annular air duct;

[0023] Figure 8 It is a schematic diagram of a regenerated asphalt mixing system according to a second specific embodiment. DETAILED DESCRIPTION

[0024] The present invention is further described below through specific implementation methods. Specific embodiment one:

[0026] Reference Figure 1-Figure 4 As shown, a burner includes a fan 1, an inner head cover 2, a flame stabilizing plate 3, a fuel pipeline 4, and a wind tube 5;

[0027] The fan 1 is connected to the inner head cover 2, and the inner head cover 2 is arranged outside the flame stabilizing plate 3, and the flame stabilizing plate 3 is connected to the fuel pipeline 4;

[0028] The wind tube 5 includes an air inlet 51, an air outlet 52, and an annular air duct 53. One end surface of the wind tube 5 is connected to the fan 1, and the other end surface is provided with an annular air duct 53. The inner head cover 2 is arranged in the annular air duct 53. The air inlet 51 is connected with the annular air duct 53. The air inlet 51 is arranged in the tangent direction of the annular air duct, and the air outlet 52 is arranged on the annular air duct 53.

[0029] The annular air duct 53 includes an inner cavity plate 531, an outer cavity plate 532, and swirl blades 533. The inner cavity plate 531 and the outer cavity plate 532 are respectively connected to the wind tube 5. The inner cavity plate 531 and the outer cavity plate 532 form an air duct groove. A plurality of swirl blades are arranged in the air duct groove to form a swirl of wind discharged toward the air outlet 52 through the annular air duct 53.

[0030] The regenerated asphalt mixing system includes a raw drum 100, a regenerated flue 200, a regenerated drum 300, a raw flue 400 and a dust collector 500.

[0031] The burner is arranged at one end of the primary drum 100, and one end of the regeneration flue 200 is connected to the regeneration drum 300, and the other end is connected to the air inlet 51 of the burner wind tube, so as to introduce the smoke in the regeneration drum 300 into the annular air duct 53;

[0032] One end of the primary flue 400 is connected to the primary drum 100 , and the other end is connected to the dust collector 500 , so as to introduce the flue gas in the primary drum 100 into the dust collector 500 .

[0033] The working process of the above-mentioned recycled asphalt mixing system and burner is as follows:

[0034] The regenerated asphalt mixing system of this embodiment is suitable for use when the amount of asphalt smoke generated by the regenerated drum 300 is relatively large. When the regenerated asphalt mixture is produced, a large amount of asphalt smoke will be generated at the regenerated drum 300, and the regenerated flue 200 will transport the asphalt smoke to the wind tube 5 of the burner connected to the original drum 100;

[0035] The asphalt smoke enters the annular air duct 53 from the air inlet 51, wherein the annular air duct 53 is an annular structure, and the air inlet 51 is tangent to the annular air duct 53, so that the asphalt smoke can form a spiral wind after passing through the annular air duct 53, avoiding the jet formed by the asphalt smoke due to the single-sided wind outlet causing the burner flame to burn unevenly, and the asphalt smoke is discharged through the air outlet 52 on the side of the annular air duct 53. The swirl blades 533 can produce a swirl effect on the asphalt smoke, so that the asphalt smoke is evenly distributed around the inner head cover 2 for secondary combustion;

[0036] The asphalt fume undergoes secondary combustion in the burner and the raw drum 100. The trace amount of asphalt fume remaining after the secondary combustion is wrapped with dust and adsorbed on the bag in the dust collector 500, and finally the treated harmless fume is discharged through the chimney. Specific embodiment 2:

[0038] A burner, comprising a fan 1, an inner head cover 2, a flame stabilizing plate 3, a fuel pipeline 4, and a wind tube 5, which are the same as those in the first specific embodiment;

[0039] The wind tube 5 includes an air inlet 51, an air outlet 52, and an annular air duct 53a. One end face of the wind tube 5 is connected to the fan 1, and the other end face is provided with an annular air duct 53a. The inner head cover 2 is arranged in the annular air duct 53a. The air inlet 51 is connected to the annular air duct 53a. The air inlet 51 is arranged in the tangent direction of the annular air duct, and the air outlet 52 is arranged on the upper side of the annular air duct 53a. The annular air duct 53a is provided with multiple nozzles 54a. The nozzle 54a includes an air duct 541a and a nozzle 542a. One end of the air duct 541a is connected to the annular air duct 53a, and the other end extends into the inner head cover 2. The nozzle 542a is arranged at one end of the air duct 541a extending into the head cover 2. The nozzle 54a includes multiple rows, and the air duct lengths of the multiple rows of nozzles 54a are different.

[0040] The regenerated asphalt mixing system includes a primary drum 100, a regenerated drum 300, a primary flue 400 and a dust collector 500 which are the same as those in the specific embodiment 1, with the difference that the regenerated flue includes a regenerated primary flue 2001, a regenerated secondary flue 2002, a regenerated tertiary flue 2003 and an induced draft fan 2004, the regenerated primary flue 2001 is connected to the regenerated drum 300, the regenerated secondary flue 2002 is connected to the burner, the regenerated primary flue is connected to the regenerated secondary flue through the induced draft fan 2004, one end of the regenerated tertiary flue 2003 is connected to the regenerated secondary flue 2002, and the other end is connected to the dust collector 2004, so as to adjust part of the smoke in the regenerated drum to be introduced into the dust collector 2004.

[0041] The working process of the above-mentioned recycled asphalt mixing system and burner is as follows:

[0042] The regenerated asphalt mixing system of this embodiment is suitable for use when the amount of asphalt smoke generated by the regenerated drum 300 is relatively small. When the regenerated asphalt mixture is produced, a large amount of asphalt smoke will be generated at the regenerated drum 300. The induced draft fan 2004 transports the asphalt smoke generated by the regenerated drum 300 through the regeneration primary flue 2001 and the regeneration secondary flue 2025 to the burner connected to the original drum 100. The induced draft fan 2004 controls the asphalt smoke intake into the burner according to the burner processing air volume. The remaining excess asphalt smoke is sent to the dust collector 500 through the regeneration tertiary flue 2003.

[0043] The air inlet 51 is tangent to the annular air duct 53a, so that the asphalt smoke can form a spiral wind after passing through the annular air duct 53a, avoiding the jet formed by the asphalt smoke due to the unilateral air outlet causing the burner flame to burn unevenly;

[0044] The asphalt smoke enters the annular air duct 53a from the air inlet 51, and enters the raw drum 100 through two paths to participate in the combustion. Part of the asphalt smoke comes out through the nozzle 54a on the inner side of the annular air duct 53a. The nozzle 542a is set in the head cover 2. The asphalt smoke enters the rear of the flame stabilizing plate 3 and mixes with the air generated by the fan 1. The mixed gas participates in the combustion of the burner as a combustion aid of the burner. The nozzle 54a is arranged on the inner side of the annular air duct 53a. Each row of air pipes 541a has different lengths and is staggered with each other so that the asphalt smoke can enter the flow layer of the burner air duct, making it more evenly mixed with the air. The oxygen content of the mixed gas is lower than that of the air, which can make the burner under low-oxygen combustion conditions, which is beneficial to reduce the generation and emission of nitrogen oxides; the rest of the asphalt smoke comes out through the air outlet 52 on the side of the annular air duct 53a, and the asphalt smoke is evenly distributed around the inner head cover 2 for secondary combustion;

[0045] The asphalt fume undergoes secondary combustion in the burner and the raw drum 100. The trace amount of asphalt fume remaining after the secondary combustion is wrapped with dust and adsorbed on the bag in the dust collector 500, and finally the treated harmless fume is discharged through the chimney.

[0046] The utility model of the regenerated asphalt mixing system and burner has high efficiency in treating asphalt fume, reduces the heat consumption of the original drum, and reduces the heat loss of a part of the burner. The regenerated asphalt fume is mixed with the fan air, so that the burner is in a low-oxygen combustion condition, which is conducive to reducing the generation and emission of nitrogen oxides. The asphalt fume can participate in the combustion to the maximum extent, and at the same time, the asphalt fume is evenly distributed around the burner through the annular air duct, avoiding the problem of the unilateral jet of the asphalt fume affecting the flame burning.

[0047] The above are only some specific implementation methods of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A burner, comprising a fan, an inner head cover, a flame stabilizing disk, and a fuel pipeline, wherein the fan is connected to the inner head cover, the inner head cover is arranged outside the flame stabilizing disk, and the flame stabilizing disk is connected to the fuel pipeline, characterized in that: It also includes a wind tube including an air inlet, an air outlet, and an annular air duct. One end face of the wind tube is connected to the fan, and the other end face is provided with an annular air duct. The inner head cover is arranged in the annular air duct, the air inlet is connected to the annular air duct, and the air outlet is arranged on the annular air duct.

2. The burner according to claim 1, characterized in that :The air inlet is arranged in the tangential direction of the annular air duct.

3. The burner according to claim 1, characterized in that The annular air duct includes an inner cavity plate and an outer cavity plate, the inner cavity plate and the outer cavity plate are respectively connected to the wind tube, and the inner cavity plate and the outer cavity plate form an air duct groove.

4. The burner according to claim 1 or 3, characterized in that : It also includes a plurality of swirl blades, which are arranged in the annular air duct and are used to form a swirl in the wind discharged toward the air outlet through the annular air duct.

5. The burner according to claim 1, characterized in that : It also includes a plurality of nozzles, the nozzles include an air duct and a nozzle, one end of the air duct is connected to the annular air duct, and the other end extends into the inner head cover, and the nozzle is arranged at the end of the air duct extending into the head cover.

6. The burner according to claim 5, characterized in that: The nozzles include multiple rows, and the air ducts of the multiple rows of nozzles have different lengths.

7. A regenerated asphalt mixing system, comprising a primary drum, a regenerated drum, and a regenerated flue, characterized in that: It also includes the burner described in any one of claims 1-6, wherein the burner is arranged at one end of the original drum, one end of the regeneration flue is connected to the regeneration drum, and the other end is connected to the air inlet of the burner wind tube, so as to introduce the smoke in the regeneration drum into the annular air duct.

8. The regenerated asphalt mixing system according to claim 7, characterized in that: It also includes a primary flue and a dust collector. One end of the primary flue is connected to the primary drum, and the other end is connected to the dust collector, so as to introduce the flue gas in the primary drum into the dust collector.

9. The regenerated asphalt mixing system according to claim 7, characterized in that: The regeneration flue comprises a regeneration primary flue, a regeneration secondary flue and an induced draft fan, the regeneration primary flue is connected to the regeneration drum, the regeneration secondary flue is connected to the burner, and the regeneration primary flue is connected to the regeneration secondary flue through the induced draft fan.

10. The regenerated asphalt mixing system according to claim 9, characterized in that: It also includes a regeneration third-level flue, one end of which is connected to the regeneration second-level flue, and the other end is connected to the dust collector, so as to adjust part of the flue gas in the regeneration drum to be introduced into the dust collector.

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