Asphalt mist vapor removal device for an asphalt distributor

Abstract

This utility model discloses an asphalt mist removal device for asphalt distributors, comprising: a support base plate, a support cover, a demisting assembly, and a recovery assembly. The support cover is connected to the support base plate and has a spray pipe that is driven to rise and fall inside, with multiple nozzles arranged on the spray pipe. The demisting assembly has a mist-suction pipe installed on the upper end of the support cover and generating negative pressure, and a purifier connected to the output end of the mist-suction pipe through a purification pipe. The recovery assembly has a recovery box located above the spray pipe for receiving liquid asphalt. This utility model uses a support cover to cover the outside of the spray pipe to prevent asphalt mist from directly diffusing into the air. The demisting assembly generates a certain negative pressure, causing the asphalt mist to enter the purifier for purification. The recovery box can recover some of the collected liquid asphalt, resulting in higher utilization. Therefore, the overall structure is simple and compact, achieving purification and recovery of asphalt mist and preventing asphalt mist overflow and environmental pollution.

Description

Technical Field

[0001] This utility model relates to road construction technology and belongs to the field of environmental protection. Specifically, it relates to an asphalt mist removal device for asphalt spraying trucks. Background Technology

[0002] An asphalt distributor truck is a tank-type special-purpose vehicle used for spraying asphalt. It delivers hot asphalt through high-pressure pipelines to multiple nozzles and sprays it evenly onto the road surface, providing a bonding layer for subsequent asphalt mixture paving or surface treatment (such as chip seal). It is widely used in road construction for highways, urban roads, airports, ports, and reservoirs.

[0003] In highway construction and maintenance projects, traditional asphalt spraying processes have some environmental drawbacks. When high-temperature asphalt is sprayed under pressure atomization, a large amount of blue smoke containing polycyclic aromatic hydrocarbons (PAHs) (a type of strong carcinogen) is instantly generated due to the flash evaporation effect. This smoke is more volatile at high temperatures and diffuses into the air, generating a large amount of suspended particulate matter (PM2.5, PM10). Atomized asphalt not only harms human health (causing cancer and mutations) but also pollutes soil and water bodies through sedimentation, damaging the ecosystem. Currently, traditional asphalt spraying trucks lack proper treatment of atomized asphalt or have low demisting capabilities. For example, they lack protective covers to prevent the diffusion of atomized asphalt, which easily causes splashing and overflow. Even with baffles installed on the outside of the nozzles, some atomized asphalt still overflows and pollutes the environment. Some methods use negative pressure collection, but the atomized asphalt can easily form water droplets on the cover plate due to the collection path, making it impossible to collect and utilize. Utility Model Content

[0004] The purpose of this invention is to provide an asphalt mist removal device for asphalt spraying trucks. It has a simple and compact structure, realizes the purification and recycling of asphalt mist, and avoids asphalt mist overflowing and polluting the environment during asphalt spraying.

[0005] To achieve the above objectives, the asphalt mist removal device for asphalt distributors includes:

[0006] The support base plate is installed on the asphalt distributor truck;

[0007] The support cover is connected to the support base plate and has a spray pipe that is driven to rise and fall inside, and multiple nozzles are arranged on the spray pipe.

[0008] The defogging assembly includes a mist suction pipe installed on the upper end of the support cover and generating negative pressure, and a purifier connected to the output end of the mist suction pipe via a purification pipe; the mist suction pipe contains a first filter assembly for preliminary treatment of asphalt mist.

[0009] The recycling assembly has a recycling bin located above the spray pipe to collect liquid bitumen.

[0010] The recovery assembly also includes a second filtration assembly for filtering impurities in liquid asphalt and a return pump;

[0011] The input end of the second filter component is connected to the recovery tank, and the output end is connected to the return pump;

[0012] The other end of the return pump is connected to the asphalt tank via a return pipe.

[0013] In some examples of this utility model, the recycling bin has a groove in the middle of its lower end, with an open structure at the upper end and receiving cavities on both sides;

[0014] An absorbent layer is laid at the opening of the groove.

[0015] In some examples of this utility model, the groove opening is provided with a plurality of spaced support bars;

[0016] Each support bar is an upward-convex arched structure, with the adsorption layer located above the support bar and the corresponding ends located within the receiving cavity.

[0017] In some examples of this utility model, at least one arc-shaped mesh is provided inside the support cover; the arc-shaped mesh curves upward.

[0018] There are multiple recycling bins, which are installed on the inner wall of the support cover and located at the lower end of the arc-shaped net.

[0019] In some examples of this utility model, the support cover is wider at the bottom and narrower at the top, and has a trapezoidal structure in its length cross-section.

[0020] In some examples of this utility model, the support cover is driven to lift and be mounted on the support base plate and connected to the mist suction pipe via a hose;

[0021] The cylinder body is mounted on the support base plate, and the telescopic end that moves up and down is connected to the support cover.

[0022] In some examples of this utility model, a centrifugal fan is provided on the mist suction pipe;

[0023] Heating components are provided on the support cover and the output end of the centrifugal fan.

[0024] Compared with existing technologies, the asphalt mist removal device for asphalt distributors is designed to prevent asphalt mist from directly spreading into the air by having a support cover installed on the outside of the spray pipe. The demisting component generates a certain negative pressure, which allows the asphalt mist to enter the purifier for purification. The recovery box can recover some of the collected liquid asphalt, resulting in higher utilization. Therefore, the overall structure is simple and compact, achieving the purification and recovery of asphalt mist and preventing asphalt mist from overflowing and polluting the environment.

[0025] Because the recycling bin has a groove in the middle of the lower end and an adsorption layer is laid at the opening of the groove, some asphalt mist can be adsorbed by the adsorption layer when it moves upward, thus avoiding the recycling bin blocking the asphalt mist; in addition, the support bar has an upward-convex arched structure, which can increase the contact area between the adsorption layer and the asphalt mist, and when the asphalt mist is adsorbed by the adsorption layer and collects, the liquid asphalt can flow into the receiving cavity along the sides of the adsorption layer, thus preventing the asphalt from falling vertically from the adsorption layer.

[0026] Alternatively, the support cover may have at least one upward-curving mesh inside, which can directly collect asphalt mist on the mesh and also catch liquid asphalt falling from the top of the support cover. Finally, the liquid asphalt can flow downward along the curve into the recycling bin on the inner wall of the support cover. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the assembly of the support base plate and the asphalt spraying vehicle in this utility model;

[0028] Figure 2 This is an assembly diagram of the defogging component, support cover and support base plate in this utility model;

[0029] Figure 3 This is a schematic diagram of the spray pipe located inside the support cover in this utility model;

[0030] Figure 4 This is a schematic diagram of the recycling component in this utility model;

[0031] Figure 5 This is a left view of an example of the assembly of the recycling bin in this utility model;

[0032] Figure 6 This is a schematic diagram of an example of a recycling bin in this utility model;

[0033] Figure 7 This is a left view of another example of the assembly of the recycling bin in this utility model;

[0034] In the diagram: 10. Supporting substrate;

[0035] 20. Support cover;

[0036] 31. Centrifugal fan; 32. Purification pipe; 33. Purifier; 34. Discharge pipe; 35. Mist suction pipe;

[0037] 41. Spray pipe; 42. Nozzle;

[0038] 51. Reflux pump; 52. Reflux pipe; 53. Gear pump;

[0039] 60. Recycling bin; 61. Adsorption layer; 62. Support strip; 63. Groove; 64. Arc-shaped mesh. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0041] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0042] like Figures 1 to 3 As shown, the asphalt mist removal device for asphalt distributors includes:

[0043] Support base plate 10 is installed on the asphalt distributor truck;

[0044] The support cover 20 is connected to the support base plate 10 and has a spray pipe 41 that is driven to rise and fall inside, and multiple nozzles 42 are arranged on the spray pipe 41.

[0045] The defogging assembly includes a mist suction pipe 35 installed on the upper end of the support cover 20 and generating negative pressure, and a purifier 33 connected to the output end of the mist suction pipe 35 via a purification pipe 32.

[0046] The recycling assembly has a recycling bin 60 located above the spray pipe 41 for receiving liquid asphalt;

[0047] Specifically, the support base plate 10 is fixedly connected to the tail plate of the asphalt sprayer. It is the support structure of this cleaning device and can be made of corrosion-resistant steel plate with a certain hardness to support the corresponding support cover 20, demisting component and recycling component.

[0048] The support cover 20 is installed outside the spray pipe 41 and can cover the perimeter without any blind spots to ensure the efficiency of asphalt mist recovery. The support cover 20 does not contact the spray pipe 41. That is, the spray pipe 41 moves inside the support cover 20 through the lifting component and can maintain a certain distance. When the spray pipe 41 moves downward and extends, the support cover 20 can completely cover the spray pipe 41 and the nozzle 42 to collect the mist generated during asphalt spraying. When the spray pipe 41 moves upward and retracts, the support cover 20 can play a role in blocking dust and human damage to protect the spray pipe 41. It is noted that the lifting component can be a hydraulic cylinder, which is installed on the support base plate 10 and its output end is connected to the spray pipe 41.

[0049] In the demisting assembly, the suction pipe 35 is located at the upper end of the support cover 20 and is equipped with a centrifugal fan 31 to generate negative pressure. The centrifugal fan 31 is driven by a high-performance motor, that is, it uses high-speed rotating blades to draw gas into the housing and accelerate it. It relies on centrifugal force to discharge toxic gases, ensuring that asphalt mist can be effectively drawn in and facilitate subsequent separation and purification. The purification pipe 32 is used to transfer the asphalt mist to the purifier 33. The purifier 33 can use physical filtration, chemical adsorption and other technologies to purify the asphalt mist. For example, it is equipped with activated carbon inside. The purified mist will be discharged from the discharge pipe 34. This means that the pure asphalt mist meets the stringent requirements of GB 36278-2018 "Emission Standard of Air Pollutants for Asphalt Industry".

[0050] In the recycling assembly, the recycling bin 60 is located above the spray pipe 41 and is used to receive and store liquid or solid asphalt that has been sprayed. There can be multiple recycling bins 60, which are arranged at intervals along the length of the support cover 20. The bottoms of adjacent recycling bins 60 are connected by conduits. Furthermore, the recycling bin 60 has a second filter assembly, which can filter impurities in the liquid asphalt.

[0051] When the asphalt mist removal device for the asphalt distributor truck is in use, the spray pipe 41 is driven to extend downwards, and hot asphalt is evenly sprayed onto the construction road surface through the nozzle 42. The asphalt mist generated during construction is surrounded by the support cover 20.

[0052] When the defogging component activates, the centrifugal fan 31 starts, creating a negative pressure within the suction pipe 35. Some asphalt mist and dust splashed from the road surface by the mist impact enter the purifier 33 through the suction pipe 35 and purification pipe 32 for treatment, and are finally discharged through the discharge pipe 34. The suction pipe 35 may be equipped with a first filter component; that is, under the action of the centrifugal fan 31, the asphalt mist first undergoes preliminary treatment through the first filter component in the suction pipe 35, such as removing PM2.5 from the atomized asphalt. 1.0 (Diameter ≤10μm), PM 2.5 The asphalt mist is separated from dust particles with a diameter ≤2.5μm and larger, as well as toxic substances such as PAHs adsorbed on the surface of the particles. The separated asphalt mist enters the purifier 33 through the purification pipe 32. The purifier 33 further processes the asphalt mist, such as adsorbing toxic substances such as polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs), hydrogen sulfide (H2S), mercaptans (RSH), and carbon disulfide (CS2), and finally discharges into the air through the emission pipe 34.

[0053] During the operation of the defogging component, some asphalt mist will accumulate inside the support cover 20. Under the action of negative pressure, the asphalt mist will easily accumulate on the upper part of the support cover 20 and gradually cool to form water droplets of liquid asphalt. As the liquid asphalt accumulates and under the action of gravity, the liquid asphalt flows into the recycling tank 60 for storage and collection.

[0054] The asphalt mist removal device for asphalt distributors is covered by a support cover 20 on the outside of the spray pipe 41 to prevent asphalt mist from directly spreading into the air. The demisting component generates a certain negative pressure, causing the asphalt mist to enter the purifier 33 for purification. The recovery box 60 can recover some of the collected liquid asphalt. Therefore, the overall structure is simple and compact, realizing the purification and recovery of asphalt mist and preventing asphalt mist from overflowing and polluting the environment.

[0055] In some examples of this utility model, such as Figure 4 As shown, the recycling assembly also includes a second filter assembly and a reflux pump 51;

[0056] The input end of the second filter assembly is connected to the recovery tank 60, and the output end is connected to the return pump 51;

[0057] The other end of the return pump 51 is connected to the asphalt tank via the return pipe 52;

[0058] Specifically, the input end of the return pump 51 is connected to the recovery tank 60 through the second filter assembly, and the output end is connected to the asphalt tank through the return pipe 52.

[0059] The second filter assembly can filter the liquid asphalt in the recycling bin 60. For example, during the asphalt construction process, sand, dust, or even metal may splash into the recycling bin 60, and the second filter assembly can filter out these impurities.

[0060] The return pump 51 starts, sucking the filtered liquid asphalt into the return pipe 52, and can then enter the asphalt tank under the further operation of the gear pump 53, realizing the recycling of asphalt.

[0061] As an example of recycling bin 60, such as Figure 5 , Figure 6 As shown, the recycling bin 60 has a groove 63 in the middle of its lower end, with an open structure at the upper end and receiving cavities on both sides;

[0062] An adsorption layer 61 is laid at the opening of the groove 63;

[0063] Specifically, the groove 63 allows asphalt mist to enter from below, preventing asphalt mist from accumulating at the bottom of the recycling bin 60; the receiving cavity is used to receive the corresponding liquid asphalt.

[0064] The adsorption layer 61 can be a porous adsorption material such as activated carbon fiber, or a composite filter material, such as an outer layer of high-temperature resistant metal mesh or glass fiber cloth and an inner layer of activated carbon. When the demisting component is activated, some asphalt mist moves upward and is adsorbed through the adsorption layer 61, thus avoiding the obstruction of the asphalt mist by the recovery box 60.

[0065] Furthermore, such as Figure 5 , Figure 6 As shown, the opening of the groove 63 is provided with a plurality of spaced support bars 62;

[0066] Each support bar 62 is an upwardly convex arched structure, and the adsorption layer 61 is located above the support bar 62 with its two ends located in the receiving cavity.

[0067] Specifically, the support strip 62 is made of high temperature and corrosion resistant metal material, which is used to support the adsorption layer 61. Multiple support strips 62 are arranged at intervals to form an outer metal mesh structure. At this time, the adsorption layer 61 is laid on the mesh structure and its two ends can extend into the corresponding receiving cavity.

[0068] The support strip 62 has an upward-convex arched structure, which can increase the contact area between the adsorption layer 61 and the asphalt mist. On the other hand, when the asphalt mist is adsorbed by the adsorption layer 61 and collected, the liquid asphalt can flow into the receiving cavity along both sides of the adsorption layer 61, thus preventing the asphalt from falling vertically from the adsorption layer 61.

[0069] The two containment chambers are connected to each other and to the return pump 51. When the liquid asphalt in the containment chamber reaches a certain amount, the return pump 51 is started to recycle the asphalt in the containment chamber.

[0070] As another example of recycling bin 60, such as Figure 7 As shown, the support cover 20 has at least one arc-shaped mesh 64 inside; the arc-shaped mesh 64 is arc-shaped upward;

[0071] There are multiple recycling bins 60, which are installed on the inner wall of the support cover 20 and are located at the lower end of the arc-shaped net 64.

[0072] Specifically, the arc-shaped mesh 64 is a multi-mesh structure and a metal material that is resistant to high temperature and corrosion. It has little impact on the operation of the demisting component. That is, after the demisting component is started, under the action of negative pressure, the asphalt mist can pass through the arc-shaped mesh 64 and move upward.

[0073] The arc-shaped mesh 64 is curved upwards, which can directly collect asphalt mist on the arc-shaped mesh 64, and can also receive liquid asphalt falling from the top of the support cover 20. Finally, the liquid asphalt can flow down the arc into the recycling box 60 on the inner wall of the support cover 20.

[0074] As explained, the recycling bin 60 is small in size, which can minimize the accumulation of asphalt mist on the recycling bin 60.

[0075] In some examples of this utility model, such as Figure 4 , Figure 5 As shown, the support cover 20 has a structure that is wider at the bottom and narrower at the top, and has a trapezoidal structure in its length cross-section;

[0076] Specifically, the support cover 20 has a structure that is wider at the bottom and narrower at the top, so that the lower end can be located around the spray pipe 41, and the constricted structure can accelerate the asphalt mist, allowing the asphalt mist to quickly enter the suction pipe 35.

[0077] Furthermore, the support cover 20 is driven to rise and fall on the support base plate 10;

[0078] Specifically, the support cover 20 can be connected to the mist suction pipe 35 via a hose and to the lifting assembly around its periphery;

[0079] The lifting assembly can be a cylinder mounted on the support base plate 10 and an auxiliary guide rod. After the cylinder is started, the telescopic end drives the support cover 20 to move up and down.

[0080] In this example, the lifting and lowering adjustment of the support cover 20 can be matched with the lifting and lowering of the spray pipe 41 and the spray flow rate of the nozzle 42, so as to avoid the support cover 20 failing to cover the outside of the spray pipe 41. For example, when the spray pipe 41 moves downward and the spray flow rate of the nozzle 42 is large, the asphalt mist has a greater impact on the ground, which can easily cause some asphalt mist to overflow from below the support cover 20. At this time, the support cover 20 moves downward accordingly to cover the outside of the spray pipe 41. It should be noted that when the support cover 20 is raised and lowered by the cylinder, it has an elastic telescopic structure. For example, the output end of the cylinder is connected to the support cover 20 through a telescopic rod, so that the support cover 20 can move upward elastically to buffer when it encounters an obstacle and avoid damage to the support cover 20.

[0081] In some examples of this utility model, heating components are provided on the support cover 20 and the output end of the centrifugal fan 31;

[0082] Specifically, the heating component can be an electric heater, such as a PTC ceramic heater or a resistance heating tube. It uses a PID temperature controller to adjust the power to achieve constant temperature output, and a temperature sensor is added to assist in temperature control. The types of heating components and temperature sensors will not be further elaborated here.

[0083] The addition of a heating component to the support cover 20 ensures that the asphalt is kept at a certain temperature, preventing it from sticking inside the support cover 20 after cooling and thus being unable to be collected by the recycling box 60; the centrifugal fan 31 heats the atomized asphalt to a certain temperature to ensure normal transportation.

[0084] The foregoing description, with reference to preferred embodiments, details an exemplary implementation of the asphalt mist removal device for asphalt distributors proposed in this utility model. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this utility model, and various combinations can be made to the various technical features and structures proposed in this utility model without exceeding the protection scope of this utility model, which is determined by the appended claims.

Claims

1. An asphalt mist removal device for asphalt distributors, comprising: Support base plate (10) is installed on asphalt sprayer; Its characteristic is that it further includes: The support cover (20) is connected to the support base plate (10) and has a spray pipe (41) that is driven to rise and fall inside, and multiple nozzles (42) are arranged on the spray pipe (41). The defogging assembly has a mist suction pipe (35) installed on the upper end of the support cover (20) and generating negative pressure, and a purifier (33) connected to the output end of the mist suction pipe (35) through a purification pipe (32); the mist suction pipe (35) is provided with a first filter assembly for preliminary treatment of asphalt mist. The recycling assembly has a recycling bin (60) located above the spray pipe (41) for receiving liquid asphalt. The recovery assembly also includes a second filter assembly for filtering impurities in liquid asphalt and a return pump (51). The input end of the second filter assembly is connected to the recovery tank (60), and the output end is connected to the return pump (51); The other end of the return pump (51) is connected to the asphalt tank via the return pipe (52).

2. The asphalt mist removal device for an asphalt distributor truck according to claim 1, characterized in that, The recycling bin (60) has a groove (63) in the middle of its lower end. The upper end of the groove (63) is an open structure and the two sides are receiving cavities. An adsorption layer (61) is laid at the opening of the groove (63).

3. The asphalt mist removal device for an asphalt distributor truck according to claim 2, characterized in that, The groove (63) opening is provided with a plurality of spaced support bars (62). Each support bar (62) is an upwardly convex arched structure, with the adsorption layer (61) located above the support bar (62) and the two ends located in the receiving cavity respectively.

4. The asphalt mist removal device for an asphalt distributor truck according to claim 1, characterized in that, The support cover (20) has at least one arc-shaped mesh (64) inside; the arc-shaped mesh (64) is arc-shaped upward; There are multiple recycling bins (60), which are installed on the inner wall of the support cover (20) and located at the lower end of the arc-shaped net (64).

5. The asphalt mist removal device for an asphalt distributor truck according to any one of claims 1 to 4, characterized in that, The support cover (20) is wider at the bottom and narrower at the top, and has a trapezoidal structure in its length section.

6. The asphalt mist removal device for an asphalt distributor truck according to claim 5, characterized in that, The support cover (20) is driven to lift and install on the support base plate (10) and is connected to the mist suction pipe (35) through a hose; The cylinder body is mounted on the support base plate (10), and the telescopic end that moves up and down is connected to the support cover (20).

7. The asphalt mist removal device for an asphalt distributor truck according to any one of claims 1 to 4, characterized in that, A centrifugal fan (31) is provided on the mist suction pipe (35); heating components are provided on the support cover (20) and the output end of the centrifugal fan (31).

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