Air duct mechanism for flue gas treatment of asphalt mixing plant

Abstract

The utility model provides an air duct mechanism for flue gas treatment of an asphalt mixing plant, and relates to the technical field of flue gas dust removal and purification. The cyclone dust collector comprises a shell, cyclone blades, an air guide cone and an air guide plate, the whole shell is in a three-fork shape with a long vertical section and a short horizontal section, an upward circular air inlet is formed in the upper end of the shell, an ash hopper is arranged at the bottom of the shell, a circular air outlet facing the horizontal direction is formed in the end of the horizontal section of the shell, and a rectangular box is arranged at the intersection of the horizontal section and the vertical section in the middle of the shell; a thin waist section is arranged between the air inlet and the rectangular box body, a plurality of rotational flow blades are arranged on the inner surface of the upper part of the thin waist section, an air guide cone with an upward sharp part is arranged in the center of the lower part of the thin waist section, a plurality of connecting rods are arranged on the outer edge of the bottom of the air guide cone, and the outer ends of the connecting rods are fixed on the inner surface of the upper part of the rectangular box body; an air guide plate is arranged in the rectangular box body, and the air guide plate and a box body side plate form a turning air channel. According to the air duct mechanism for flue gas treatment of the asphalt mixing plant, dust attachment can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas dust removal and purification, and specifically, to an air duct mechanism for flue gas treatment in an asphalt mixing plant. Background Art

[0002] An asphalt mixing plant is a station for producing asphalt mixtures, and there are various asphalt mixture mixing devices in the asphalt mixing plant. Asphalt mixtures are designed in strict accordance with the ratio of aggregate, asphalt, mineral powder, and additives. During the production process, each component needs to be weighed, and different-sized aggregates, fillers, and asphalt that are dried and heated need to be mixed and stirred in proportion at a specified temperature to form a uniform mixture. Asphalt mixtures are widely used in the construction of high-grade highways, urban roads, airports, docks, parking lots, and other projects. Asphalt mixtures are the main materials for asphalt pavement construction, and their performance directly affects the quality of asphalt pavements.

[0003] During the production process of asphalt mixtures, asphalt and some aggregates and powders need to be heated, and heating will generate flue gas. Moreover, dust will be generated throughout the entire production process including mixing. The dust and flue gas will pollute the atmospheric environment and need to be treated. The existing dust removal systems in asphalt mixing plants use multi-stage dust removal equipment, and air duct mechanisms such as pipes are provided between the dust removal equipment and between the dust generation points and the dust removal equipment. The existing air duct mechanisms have problems such as being prone to dust adhesion and the air duct resistance increasing over time. Content of the Utility Model

[0004] Therefore, the utility model proposes an air duct mechanism for flue gas treatment in an asphalt mixing plant to improve the problems existing in the above prior art.

[0005] The technical solution of the utility model is as follows:

[0006] An air duct mechanism for flue gas treatment in an asphalt mixing plant includes a housing, swirl vanes, a wind guiding cone, and a wind guiding plate. The housing is integrally in a three-pronged shape with a long vertical section and a short horizontal section. The upper end of the housing is an upward-facing circular air inlet, a dust hopper is provided at the bottom of the housing, and a circular air outlet facing the horizontal direction is provided at the end of the horizontal section of the housing. The intersection of the horizontal section and the vertical section in the middle of the housing is a rectangular box body; a thin waist section is provided between the air inlet and the rectangular box body. Multiple swirl vanes are provided on the inner surface of the upper part of the thin waist section, and a wind guiding cone with a pointed end facing upward is provided at the center of the lower part of the thin waist section. Multiple connecting rods are provided on the outer edge of the bottom of the wind guiding cone, and the outer ends of the connecting rods are fixed on the inner surface of the upper part of the rectangular box body; a wind guiding plate is provided in the rectangular box body, and the wind guiding plate and the side plate of the box body form a turning air duct.

[0007] As a preferred technical solution, there are two air guide plates, both of which are inclined and parallel to each other. The upper edge of the upper air guide plate is located at the junction of the rectangular box and the air outlet, and the lower edge of the lower air guide plate is located at the junction of the rectangular box and the ash hopper.

[0008] As a preferred technical solution, two plug-in valves connected in series are provided at the bottom end of the ash hopper, and the two plug-in valves are arranged at intervals.

[0009] As a preferred technical solution, the inner diameter of the air inlet is equal to the inner diameter of the air outlet, and the side length of the rectangular box in the horizontal direction is greater than the diameter of the air inlet.

[0010] As a preferred technical solution, the bottom end of the ash hopper is a square ash discharge port, the gate valve is arranged below the ash discharge port, the valve plate of the gate valve is square, and a square pipe is between the two gate valves.

[0011] The working principle and beneficial effects of the utility model are:

[0012] The utility model provides an air duct mechanism for smoke treatment in an asphalt mixing station. When in use, the air inlet and the air outlet are respectively connected to the pipeline. After the smoke enters from the air inlet, it passes through the swirl blades to generate a swirl. Then, the air flow speed is accelerated after passing through the thin waist section. Then, the rotating air flow is guided to the side wall by the air guide cone. Part of the dust falls into the ash hopper under the action of centrifugal force and gravity. The downward airflow continues to be guided by the air guide plate, then turns upward and flows to the air outlet. Part of the dust falls into the ash hopper under the action of gravity. When the dust in the ash hopper accumulates to a certain extent, the ash is discharged. When discharging the ash, the upper gate valve is first opened to allow the dust to fall into the space between the two gate valves, and then the upper gate valve is closed, and then the lower gate valve is opened to complete one ash discharge. The utility model of the air duct mechanism for smoke treatment in an asphalt mixing station can block and discharge large particles of dust in time to reduce dust adhesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model after cutting;

[0018] In the figure: 1. Housing; 11. Air inlet; 12. Air outlet; 13. Ash hopper; 14. Narrow waist section; 2. Swirl vane; 3. Air guide cone; 31. Connecting rod; 4. Air guide plate; 5. Slide valve. Detailed implementation manners

[0019] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 to 4 As shown in the figure, this embodiment provides an air duct mechanism for flue gas treatment in an asphalt mixing plant, which includes a housing 1, a swirl vane 2, an air guide cone 3 and an air guide plate 4. The housing 1 is in a three-pronged shape with a long vertical section and a short horizontal section as a whole. The upper end of the housing 1 is a circular air inlet 11 facing upward. The bottom of the housing 1 is provided with an ash hopper 13. The end of the horizontal section of the housing 1 is provided with a circular air outlet 12 facing the horizontal direction. The intersection of the horizontal section and the vertical section in the middle of the housing 1 is a rectangular box. There is a narrow waist section 14 between the air inlet 11 and the rectangular box. The inner surface of the upper part of the narrow waist section 14 is provided with multiple swirl vanes 2. The center of the lower part of the narrow waist section 14 is provided with an air guide cone 3 with a pointed part facing upward. The outer edge of the bottom of the air guide cone 3 is provided with multiple connecting rods 31, and the outer ends of the connecting rods 31 are fixed on the inner surface of the upper part of the rectangular box. An air guide plate 4 is arranged in the rectangular box, and the air guide plate 4 and the side plate of the box form a turning air duct.

[0021] Specifically, in this embodiment, the number of the air guide plates 4 is two. The two air guide plates 4 are both inclined and parallel to each other. The upper edge of the upper air guide plate 4 is located at the junction of the rectangular box and the air outlet 12, and the lower edge of the lower air guide plate is located at the junction of the rectangular box and the ash hopper 13.

[0022] In addition, the bottom end of the ash hopper 13 is provided with two series-connected slide valves 5, and the two slide valves 5 are arranged at intervals. The bottom end of the ash hopper 13 is preferably provided with a square ash discharge port, and the slide valve 5 is arranged below the ash discharge port. At this time, the valve plate of the slide valve 5 is square, and the pipeline between the two slide valves 5 is square. Preferably, the inner diameter of the air inlet 11 is equal to the inner diameter of the air outlet 12, and the side length of the rectangular box in the horizontal direction is greater than the diameter of the air inlet 11.

[0023] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air duct mechanism for flue gas treatment of an asphalt mixing plant, characterized in that: It includes a housing, swirl vanes, a wind guiding cone and a wind guiding plate. The housing is overall in a three-pronged shape with a long vertical section and a short horizontal section. The upper end of the housing is a circular air inlet facing upwards, a dust hopper is provided at the bottom of the housing, a circular air outlet facing the horizontal direction is provided at the end of the horizontal section of the housing, and the intersection of the horizontal section and the vertical section in the middle of the housing is a rectangular box body; there is a thin waist section between the air inlet and the rectangular box body. Multiple swirl vanes are provided on the inner surface of the upper part of the thin waist section, a wind guiding cone with a pointed part facing upwards is provided at the center of the lower part of the thin waist section, and multiple connecting rods are provided on the outer edge of the bottom of the wind guiding cone. The outer ends of the connecting rods are fixed on the inner surface of the upper part of the rectangular box body; a wind guiding plate is provided in the rectangular box body, and the wind guiding plate and the side plate of the box body form a turning air duct.

2. The air duct mechanism for flue gas treatment of the asphalt mixing plant according to claim 1, characterized in that: The number of the wind guiding plates is two. The two wind guiding plates are both inclined and parallel to each other. The upper edge of the upper wind guiding plate is located at the junction of the rectangular box body and the air outlet, and the lower edge of the lower wind guiding plate is located at the junction of the rectangular box body and the dust hopper.

3. The air duct mechanism for flue gas treatment of the asphalt mixing plant according to claim 2, characterized in that: Two series-connected flap valves are provided at the bottom end of the dust hopper, and the two flap valves are arranged at intervals.

4. The air duct mechanism for flue gas treatment of an asphalt mixing plant according to claim 3, characterized in that: The inner diameter of the air inlet is equal to the inner diameter of the air outlet, and the side length of the rectangular box body in the horizontal direction is greater than the diameter of the air inlet.

5. The air duct mechanism for flue gas treatment of an asphalt mixing plant according to claim 3, characterized in that: The bottom end of the dust hopper is a square ash discharge port. The flap valve is provided below the ash discharge port. The valve plate of the flap valve is square, and a square pipeline is provided between the two flap valves.

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