Powder supply device and asphalt flue gas purification system

Abstract

The embodiment of the invention discloses a powder supply device and an asphalt flue gas purification system. The powder supply device comprises a mounting frame, a powder supply device and a power supply device, the stock bin is mounted on the mounting frame and used for storing powder; the feeding pipe can be communicated with the stock bin, and the height of the feeding pipe is lower than that of the stock bin; the unloader is communicated with one end, far away from the stock bin, of the feeding pipe; the discharging pipe is communicated with the unloader, and the unloader can discharge the powder in the feeding pipe into the discharging pipe; the powder feeding fan communicates with the discharging pipe, and the powder feeding fan can supply air into the discharging pipe so as to blow out powder in the discharging pipe; and the blowing device is connected with the stock bin and the feeding pipe, and the blowing device can supply air into the stock bin and the feeding pipe. The blowing device can supply air into the stock bin and the feeding pipe, airflow acts on the powder in the stock bin and the feeding pipe, the flowability of the powder is improved, the powder accumulated or attached to the wall surface can be blown off, and then the powder is prevented from being accumulated in the stock bin and the feeding pipe.

Description

Technical Field

[0001] This application relates to the field of asphalt fume purification technology, and in particular to a powder supply device and an asphalt fume purification system. Background Technology

[0002] The powder supply device in the asphalt fume purification system is used to supply powder, which is used to purify the asphalt fume. The powder flows downward under its own gravity in the powder supply device and is blown out by the fan. However, the powder is prone to accumulate in the silo and feed pipe during the flow process. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0004] In view of the above, the first aspect of this application proposes a powder supply device, comprising: a mounting frame; a hopper mounted on the mounting frame, the hopper being used to store powder; a feed pipe communicating with the hopper, the height of the feed pipe being lower than that of the hopper; a discharge device communicating with the end of the feed pipe away from the hopper; a discharge pipe communicating with the discharge device, the discharge device being able to discharge the powder in the feed pipe into the discharge pipe; a powder feeding fan communicating with the discharge pipe, the powder feeding fan being able to blow air into the discharge pipe to blow out the powder in the discharge pipe; and a blowing device connected to the hopper and the feed pipe, the blowing device being able to blow air into the hopper and the feed pipe.

[0005] In some technical solutions provided in this application, the blowing device includes: an air storage cylinder containing compressed gas; at least one first air supply pipe installed in a silo, one end of which is connected to the air storage cylinder and the other end extends into the silo, wherein the compressed gas in the air storage cylinder can be sent into the silo through the first air supply pipe; and at least one second air supply pipe installed in a feed pipe, one end of which is connected to the air storage cylinder and the other end extends into the feed pipe, wherein the compressed gas in the air storage cylinder can be sent into the feed pipe through the second air supply pipe.

[0006] In some of the technical solutions provided in this application, the end of the hopper near the feed pipe has a conical discharge component. Along the direction toward the feed pipe, the cross-sectional size of the conical discharge component gradually decreases, and the first air supply pipe extends into the conical discharge component.

[0007] In some of the technical solutions provided in this application, the first air supply pipe extends into the hopper and has multiple first air outlets on its pipe wall, and the second air supply pipe extends into the feed pipe and has multiple second air outlets on its pipe wall.

[0008] In some of the technical solutions provided in this application, the portion of the first air supply pipe inside the hopper extends inclined from high to low, and the portion of the second air supply pipe inside the feed pipe extends inclined from high to low.

[0009] In some of the technical solutions provided in this application, the blowing device further includes: multiple electromagnetic pulse valves, which are respectively installed between the first air supply pipe and the air storage cylinder and between the second air supply pipe and the air storage cylinder. The electromagnetic pulse valves can open and close the first air supply pipe and the second air supply pipe.

[0010] In some of the technical solutions provided in this application, the feed pipe has a conical structure, and the cross-sectional dimensions of the feed pipe gradually decrease along the direction away from the hopper.

[0011] In some of the technical solutions provided in this application, the powder supply device further includes: a connecting pipe, one end of which is connected to the unloader, and the other end is connected to the discharge pipe and extends into the discharge pipe, with the portion of the connecting pipe extending into the discharge pipe bent in the direction away from the powder feeding fan.

[0012] In some of the technical solutions provided in this application, the powder supply device further includes: a slide gate valve, installed between the silo and the feed pipe. The slide gate valve can switch between an open state and a closed state. When the slide gate valve is in the open state, the silo is connected to the feed pipe. When the slide gate valve is in the closed state, the slide gate valve isolates the silo from the feed pipe.

[0013] The second aspect of this application discloses an asphalt fume purification system, comprising: a reaction device in which asphalt fume is collected; and a powder supply device as disclosed in the first aspect of this application, wherein the discharge pipe of the powder supply device is connected to the reaction device and the discharge pipe is capable of discharging powder into the reaction device so that the powder purifies the asphalt fume.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: This application provides a blowing device in the powder supply device, which can deliver air to the silo and feed pipe. The airflow acts on the powder in the silo and feed pipe, increasing the flowability of the powder and blowing off the powder that is piled up or attached to the wall, thereby preventing the powder from accumulating in the silo and feed pipe. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic diagram of the structure of a powder supply device according to an embodiment of this application is shown; Figure 2 A schematic diagram of the feed pipe of one embodiment provided in this application is shown; Figure 3This invention provides a schematic diagram of the structure of a connecting pipe inserted into a discharge pipe according to an embodiment of the present application. Figure 4 A schematic diagram of the structure of a gas storage cylinder according to an embodiment of this application is shown; Figure 5 A schematic diagram of the structure of the first air outlet duct section according to an embodiment of this application is shown.

[0016] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100. Powder supply device; 110. Mounting frame; 120. Hopper; 121. Conical discharge component; 122. Storage cylinder; 130. Feed pipe; 140. Unloader; 150. Discharge pipe; 160. Powder feeding fan; 170. Blowing device; 171. Air storage cylinder; 172. First air supply pipe; 1721. First flexible pipe section; 1722. First air outlet pipe section; 1723. First air outlet; 173. Second air supply pipe; 1731. Second flexible pipe section; 1732. Second air outlet pipe section; 1733. Second air outlet; 174. Electromagnetic pulse valve; 180. Slide valve; 190. Connecting pipe. Detailed Implementation

[0017] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0018] The following reference Figures 1 to 5 The powder supply device 100 and the asphalt fume purification system provided according to some embodiments of the present invention are described.

[0019] In one embodiment according to this application, such as Figure 1 As shown, this application proposes a powder supply device 100, including: a mounting frame 110; a hopper 120 mounted on the mounting frame 110, the hopper 120 being used to store powder; a feed pipe 130 connected to the hopper 120, the height of the feed pipe 130 being lower than the hopper 120; a discharger 140 connected to the end of the feed pipe 130 away from the hopper 120; a discharge pipe 150 connected to the discharger 140, the discharger 140 being able to discharge the powder in the feed pipe 130 into the discharge pipe 150; a powder feeding fan 160 connected to the discharge pipe 150, the powder feeding fan 160 being able to blow air into the discharge pipe 150 to blow out the powder in the discharge pipe 150; and a blowing device 170 connected to the hopper 120 and the feed pipe 130, the blowing device 170 being able to blow air into the hopper 120 and the feed pipe 130.

[0020] The powder supply device 100 proposed in this application can be used in an asphalt fume purification system. The powder supply device 100 can provide powder for purifying asphalt fumes. The powder supply device 100 includes a mounting frame 110, a hopper 120, a feed pipe 130, a discharger 140, a discharge pipe 150, and a powder feeding fan 160. The hopper 120 is used to store powder. When the discharger 140 discharges, the powder in the hopper 120 can enter the discharge pipe 150 through the feed pipe 130, and then the powder in the discharge pipe 150 is blown out by the powder feeding fan 160 to achieve feeding.

[0021] Specifically, the hopper 120 is mounted on the mounting frame 110 and can store a certain amount of powder. The feed pipe 130 is located below the hopper 120, and the bottom of the hopper 120 can communicate with the feed pipe 130. The powder in the hopper 120 can flow into the feed pipe 130 under the action of gravity. The unloader 140 is located below the feed pipe 130 and is connected to the end of the feed pipe 130 away from the hopper 120. The discharge pipe 150 is connected to the unloader 140. When the unloader 140 is opened for unloading, the powder in the feed pipe 130 enters the unloader 140, and the unloader 140 discharges the powder into the discharge pipe 150.

[0022] In one possible embodiment, the unloader 140 is equipped with a rotatable impeller. When the unloader 140 is opened for unloading, the impeller rotates, carrying powder with it. When the powder rotates to a position near the discharge pipe 150, it falls into the discharge pipe 150. The unloading speed of the unloader 140 can be adjusted by changing the rotation speed of the impeller.

[0023] The powder feeding fan 160 is connected to the discharge pipe 150. When the powder feeding fan 160 is running, it blows air into the discharge pipe 150. The airflow generated by the powder feeding fan 160 blows the powder out of the discharge pipe 150, thus completing the powder supply process. The wind speed of the powder feeding fan 160 is adjustable. When the powder supply is large, the wind speed of the powder feeding fan 160 can be increased; when the powder supply is small, the wind speed of the powder feeding fan 160 can be decreased.

[0024] Understandably, when the powder has high moisture content or a small total amount, the powder is prone to localized accumulation or poor flowability within the hopper 120 or feed pipe 130. To improve the flowability of the powder and prevent its accumulation within the hopper 120 and feed pipe 130, this application further includes a blowing device 170 in the powder supply device 100. The blowing device 170 can supply air into the hopper 120 and feed pipe 130 to blow out the accumulated powder. Specifically, the blowing device 170 can generate a high-pressure airflow. The blowing device 170 is connected to the hopper 120 and feed pipe 130 and can supply air into them. The airflow generated by the blowing device 170 blows the powder into the hopper 120 and feed pipe 130, thereby increasing the flowability of the powder and blowing off any powder accumulated or adhering to the walls. This prevents powder from accumulating in the hopper 120 and feed pipe 130, and improves the flowability of the powder.

[0025] By providing a blowing device 170 in the powder supply device 100, air can be blown into the hopper 120 and the feed pipe 130 through the blowing device 170. The airflow acts on the powder in the hopper 120 and the feed pipe 130, increasing the fluidity of the powder and blowing off the powder that is piled up or attached to the wall, thereby preventing the powder from accumulating in the hopper 120 and the feed pipe 130.

[0026] In some embodiments, optionally, such as Figure 1 As shown, the blowing device 170 includes: an air storage cylinder 171 containing compressed gas; at least one first air supply pipe 172 installed in the hopper 120, one end of the first air supply pipe 172 being connected to the air storage cylinder 171 and the other end extending into the hopper 120, wherein the compressed gas in the air storage cylinder 171 can be fed into the hopper 120 through the first air supply pipe 172; and at least one second air supply pipe 173 installed in the feed pipe 130, one end of the second air supply pipe 173 being connected to the air storage cylinder 171 and the other end extending into the feed pipe 130, wherein the compressed gas in the air storage cylinder 171 can be fed into the feed pipe 130 through the second air supply pipe 173.

[0027] In this embodiment, the structure of the blowing device 170 is defined. The blowing device 170 includes an air storage cylinder 171, a first air supply pipe 172, and a second air supply pipe 173. The air storage cylinder 171 stores compressed gas, which can be discharged through the first air supply pipe 172 and the second air supply pipe 173 to form an airflow. An air inlet is provided on the air storage cylinder 171, through which compressed gas can be injected. In one possible embodiment, the air storage cylinder 171 is manufactured by welding and sealing both ends of a thick-walled seamless tube with a diameter of 160 mm and a length of 1500 mm. One end is opened and a short pipe with a diameter of 45 mm and a length of 200 mm with a flange is welded on. This short pipe serves as the air inlet of the air storage cylinder 171 and is used to connect compressed air.

[0028] Specifically, a first air supply pipe 172 is installed in the silo 120. One end of the first air supply pipe 172 is connected to an air storage cylinder 171, and the other end extends into the silo 120. Compressed gas in the air storage cylinder 171 can be discharged into the silo 120 through the first air supply pipe 172 to form an airflow. The airflow can increase the flowability of the powder in the silo 120 and can blow accumulated powder off the wall of the silo 120, preventing powder from accumulating in the silo 120. There can be one or more first air supply pipes 172. When there are multiple first air supply pipes 172, they are installed at different positions in the silo 120 to form airflow in multiple directions.

[0029] Furthermore, the first air supply pipe 172 includes a first flexible pipe section 1721 and a first air outlet pipe section 1722. The first flexible pipe is connected to the air storage cylinder 171 and is made of a flexible material, which facilitates adjustment of the installation position of the air storage cylinder 171. The first air outlet pipe section 1722 is installed in the hopper 120. One end of the first air outlet pipe section 1722 is connected to the first flexible pipe section 1721, and the other end extends into the hopper 120. The first air outlet pipe section 1722 is made of a rigid material to facilitate control of the air outlet position of the first air supply pipe 172 and prevent the first air outlet pipe from moving under the pressure of powder. In one possible embodiment, the first air outlet pipe is made of a seamless metal pipe with a diameter of 32 mm and a length of 300 mm.

[0030] Furthermore, a second air supply pipe 173 is installed in the feed pipe 130. One end of the second air supply pipe 173 is connected to the air storage cylinder 171, and the other end extends into the feed pipe 130. Compressed gas in the air storage cylinder 171 can be discharged into the feed pipe 130 through the second air supply pipe 173 to form an airflow. The airflow can increase the flowability of the powder in the feed pipe 130 and can blow accumulated powder off the wall of the feed pipe 130, preventing powder from accumulating in the feed pipe 130. There can be one or more second air supply pipes 173. When there are multiple second air supply pipes 173, they are installed at different positions in the feed pipe 130 to form airflow in multiple directions.

[0031] Furthermore, the second air supply pipe 173 includes a second flexible pipe section 1731 and a second air outlet pipe section 1732. The second flexible pipe is connected to the air storage cylinder 171 and is made of a flexible material, which facilitates adjustment of the installation position of the air storage cylinder 171. The second air outlet pipe section 1732 is installed in the feed pipe 130. One end of the second air outlet pipe section 1732 is connected to the second flexible pipe section 1731, and the other end extends into the feed pipe 130. The second air outlet pipe section 1732 is made of a rigid material to facilitate control of the air outlet position of the second air supply pipe 173 and prevent the second air outlet pipe from moving under the pressure of the powder.

[0032] The first air outlet duct section 1722 has a threaded end near the air storage cylinder 171, and a threaded connector is installed at the end of the first flexible duct section 1721. The first air outlet duct section 1722 is connected to the first flexible duct section 1721 via threads. The second air outlet duct section 1732 has a threaded end near the air storage cylinder 171, and a threaded connector is installed at the end of the second flexible duct section 1731. The second air outlet duct section 1732 is connected to the second flexible duct section 1731 via threads.

[0033] By providing a first air supply pipe 172 and a second air supply pipe 173 in the blowing device 170, air can be supplied to the hopper 120 and the feed pipe 130 respectively through the first air supply pipe 172 and the second air supply pipe 173. In one possible embodiment, the second air outlet pipe is made of a seamless metal pipe with a diameter of 32 mm and a length of 300 mm.

[0034] In some embodiments, optionally, such as Figure 1 As shown, the end of the hopper 120 near the feed pipe 130 has a conical feeder 121. Along the direction toward the feed pipe 130, the cross-sectional size of the conical feeder 121 gradually decreases, and the first air supply pipe 172 extends into the conical feeder 121.

[0035] In this embodiment, the structure of the hopper 120 is defined. The hopper 120 includes a storage cylinder 122 and a conical discharge member 121. The conical discharge member 121 is connected to the bottom of the storage cylinder 122 and is located near the feed pipe 130. The cross-sectional dimensions of the conical discharge member 121 gradually decrease along the direction toward the feed pipe 130. Understandably, compared to a cylindrical structure, the conical structure can slow down the flow rate of the powder and allow the powder to flow downwards along the inclined inner wall, reducing the accumulation of powder on the bottom wall.

[0036] Furthermore, the first air supply pipe 172 extends into the conical feeding component 121, that is, the first air supply pipe 172 supplies air to the powder in the conical feeding component 121 to improve the flowability of the powder in the conical feeding component 121 and prevent the powder from accumulating in the conical feeding component 121.

[0037] In some embodiments, optionally, such as Figure 2 and Figure 5 As shown, the first air supply pipe 172 extends into the hopper 120 and has multiple first air outlets 1723 on its pipe wall, and the second air supply pipe 173 extends into the feed pipe 130 and has multiple second air outlets 1733 on its pipe wall.

[0038] In this embodiment, the structures of the first air supply pipe 172 and the second air supply pipe 173 are defined. A portion of the first air supply pipe 172 extends into the hopper 120, and another portion is located outside the hopper 120. The portion of the first air supply pipe 172 extending into the hopper 120 has multiple first air outlets 1723 on its wall, which are used to discharge airflow. Specifically, the first air supply pipe 172 includes a first flexible pipe section 1721 and a first air outlet pipe section 1722. The first air outlet pipe section 1722 is installed on the wall of the hopper 120, and a portion of the first air outlet pipe section 1722 is located inside the hopper 120. The multiple first air outlets 1723 are located on the portion of the first air outlet pipe section 1722 located inside the hopper 120. The end of the first air outlet section 1722 located inside the hopper 120 is a closed structure, and multiple first air outlets 1723 are evenly distributed along the extension direction of the first air outlet section 1722 on the pipe wall. This increases the number of air outlet positions of the first air supply pipe 172, allowing the airflow to act more evenly on the powder at different locations within the hopper 120, further improving the flowability of the powder.

[0039] Furthermore, the end of the first air supply pipe 172 is located at the center of the conical feeder 121, which further increases the effective area of ​​the airflow within the hopper 120.

[0040] Furthermore, a portion of the second air supply pipe 173 extends into the feed pipe 130, while the other portion is located outside the hopper 120. The portion of the second air supply pipe 173 extending into the feed pipe 130 has multiple second air outlets 1733 on its wall, used to discharge airflow. Specifically, the second air supply pipe 173 includes a second flexible pipe section 1731 and a second air outlet pipe section 1732. The second air outlet pipe section 1732 is installed on the wall of the feed pipe 130, with a portion located inside the feed pipe 130. Multiple second air outlets 1733 are located on the portion of the second air outlet pipe section 1732 located inside the feed pipe 130. The end of the second air outlet pipe section 1732 located inside the feed pipe 130 is a closed structure, and the multiple second air outlets 1733 are evenly distributed along the extension direction of the second air outlet pipe section 1732 on its wall. This increases the outlet position of the second air supply pipe 173, allowing the airflow to act more evenly on the powder at different positions within the feed pipe 130, further improving the flowability of the powder.

[0041] In one possible embodiment, the end of the second air supply pipe 173 is located at the center of the feed pipe 130, which can further increase the area of ​​action of the airflow within the feed pipe 130.

[0042] In one possible embodiment, the diameter of the first air outlet 1723 and the second air outlet 1733 is 10mm. By setting the air outlet and the second air outlet 1733 as opening structures with smaller diameters, the airflow velocity can be increased, thereby improving the effect of the airflow on the powder, further improving the flowability of the powder, and preventing powder accumulation.

[0043] In some embodiments, optionally, there are multiple first air supply pipes 172 and multiple second air supply pipes 173, with multiple first air supply pipes 172 installed at different positions of the conical feeder 121 and multiple second air supply pipes 173 installed at different positions of the feed pipe 130.

[0044] In this embodiment, the first air supply pipe 172 and the second air supply pipe 173 are further defined, with multiple first air supply pipes 172 and multiple second air supply pipes 173. The multiple first air supply pipes 172 operate independently, meaning they can supply air simultaneously or individually. The multiple first air supply pipes 172 are installed at different positions on the conical feeder 121; specifically, they are arranged sequentially along the circumference of the conical feeder 121. This increases the area of ​​airflow acting on the powder within the conical feeder 121, achieving multi-point air supply, preventing uneven force distribution on the powder within the hopper 120, avoiding localized accumulation, and further improving the flowability of the powder within the hopper 120. Furthermore, since the multiple first air supply pipes 172 operate independently, each first air supply pipe 172 can be opened or closed according to the different powder accumulation conditions at various locations within the hopper 120.

[0045] Furthermore, the multiple second air supply ducts 173 operate independently, meaning they can supply air simultaneously or individually. The multiple second air supply ducts 173 are installed at different positions within the feed pipe 130; specifically, they are arranged sequentially along the circumference of the feed pipe 130. This increases the area of ​​airflow action on the powder within the feed pipe 130, enabling multi-point air supply, preventing uneven force distribution on the powder within the feed pipe 130, avoiding localized accumulation, and further improving the flowability of the powder within the feed pipe 130. Moreover, since the multiple second air supply ducts 173 operate independently, each second air supply duct 173 can be opened or closed individually based on the different powder accumulation conditions at different locations within the feed pipe 130.

[0046] In some embodiments, optionally, the portion of the first air duct 172 within the hopper 120 extends at an angle from high to low, and the portion of the second air duct 173 within the feed pipe 130 extends at an angle from high to low.

[0047] In this embodiment, the first air supply pipe 172 and the second air supply pipe 173 are further defined. Both the first air supply pipe 172 and the second air supply pipe 173 are installed at an angle. Specifically, the portion of the first air supply pipe 172 within the hopper 120 extends at an angle from high to low, that is, the portion of the first air supply pipe 172 within the hopper 120 extends downward at an angle. This allows the powder near the conical feeder 121 to be subjected to the force of airflow, which helps to improve the flowability of the powder in the lower area, making it easier for the powder to flow into the feed pipe 130. In one possible embodiment, the angle between the portion of the first air supply pipe 172 within the hopper 120 and the horizontal direction is 45°.

[0048] Furthermore, the portion of the second air supply pipe 173 within the feed pipe 130 extends at an angle from high to low, i.e., the portion of the second air supply pipe 173 within the feed pipe 130 extends downwards at an angle. This allows the powder near the bottom of the feed pipe 130 to be subjected to the force of airflow, which helps improve the flowability of the powder in the lower region, making it easier for the powder to flow into the discharge pipe 150. In one possible embodiment, the angle between the portion of the second air supply pipe 173 within the feed pipe 130 and the horizontal direction is 60°.

[0049] In some embodiments, optionally, such as Figure 1 and Figure 4 As shown, the blowing device 170 also includes: a plurality of electromagnetic pulse valves 174, which are respectively installed between the first air supply pipe 172 and the air storage cylinder 171 and the second air supply pipe 173 and the air storage cylinder 171. The electromagnetic pulse valves 174 can open and close the first air supply pipe 172 and the second air supply pipe 173.

[0050] In this embodiment, the structure of the blowing device 170 is further defined. The blowing device 170 also includes a plurality of electromagnetic pulse valves 174, which are used to control the first air supply pipe 172 and the second air supply pipe 173. Specifically, the plurality of electromagnetic pulse valves 174 are all installed in the air storage tank 171, and the plurality of electromagnetic pulse valves 174 are respectively configured to correspond one-to-one with at least one first air supply pipe 172 and at least one second air supply pipe 173. Each first air supply pipe 172 is connected to one of the plurality of electromagnetic pulse valves 174, and each second air supply pipe 173 is connected to one of the plurality of electromagnetic pulse valves 174. The electromagnetic pulse valve 174 connected to the first air supply pipe 172 can control the opening and closing of the first air supply pipe 172, as well as the air supply duration and frequency of the first air supply pipe 172. The electromagnetic pulse valve 174 connected to the second air supply pipe 173 can control the opening and closing of the second air supply pipe 173, as well as the air supply duration and frequency of the second air supply pipe 173. Multiple electromagnetic pulse valves 174 work independently of each other.

[0051] Furthermore, the first flexible tube of the first air supply duct 172 is connected to the corresponding electromagnetic pulse valve 174, and the second flexible tube of the second air supply duct 173 is connected to the corresponding electromagnetic pulse valve 174.

[0052] By installing multiple electromagnetic pulse valves 174 in the blowing device 170, the opening and closing states of the first air supply pipe 172 and the second air supply pipe 173, as well as the air supply duration and air supply frequency, can be controlled by the electromagnetic pulse valves 174, thereby improving the blowing effect of the blowing device 170.

[0053] In some embodiments, optionally, such as Figure 1 and Figure 2As shown, the feed pipe 130 has a conical structure, and the cross-sectional dimensions of the feed pipe 130 gradually decrease along the direction away from the hopper 120.

[0054] In this embodiment, the structure of the feed pipe 130 is defined. The feed pipe 130 has a conical structure, and its cross-sectional dimensions gradually decrease along the direction away from the hopper 120. Since the feed pipe 130 has a structure that is larger at the top and smaller at the bottom, its inner wall is inclined. Compared with the traditional cylindrical structure, the conical feed pipe 130 in this application is easier to feed, and the powder can flow downward along the inclined inner wall, reducing the possibility of powder accumulating on the pipe wall and at the bottom of the feed pipe 130. It can also prevent a large amount of powder from falling rapidly and avoids material overflow.

[0055] In one possible embodiment, the diameter of the end of the feed pipe 130 near the hopper 120 is 160 mm, and the diameter of the end of the feed pipe 130 away from the hopper 120 is 60 mm.

[0056] In some embodiments, optionally, such as Figure 1 and Figure 3 As shown, the powder supply device 100 also includes a connecting pipe 190, one end of which is connected to the unloader 140, and the other end is connected to the discharge pipe 150 and extends into the discharge pipe 150. The portion of the connecting pipe 190 extending into the discharge pipe 150 is bent in a direction away from the powder feeding fan 160.

[0057] In this embodiment, the structure of the powder supply device 100 is further defined. The powder supply device 100 also includes a connecting pipe 190, which connects the unloader 140 to the discharge pipe 150. Specifically, one end of the connecting pipe 190 is connected to the unloader 140, and the other end is connected to the discharge pipe 150. When the unloader 140 is unloading, the powder can flow into the discharge pipe 150 through the connecting pipe 190.

[0058] Furthermore, one end of the connecting pipe 190, which is connected to the discharge pipe 150, extends into the discharge pipe 150, and the portion of the connecting pipe 190 extending into the discharge pipe 150 bends away from the powder feeding fan 160. Understandably, the powder feeding fan 160 generates airflow within the discharge pipe 150, blowing the powder out of the discharge pipe 150. If the connecting pipe 190 does not extend into the discharge pipe 150, the air pressure generated by the powder feeding fan 160 within the discharge pipe 150 can easily backflow into the connecting pipe 190, leading to uneven powder feeding. In this application, the end of the connecting pipe 190 extends into the discharge pipe 150. The portion of the connecting pipe 190 extending into the discharge pipe 150 turbulents the airflow generated by the powder feeding fan 160, preventing backflow of air pressure at the inlet of the connecting pipe 190, thus ensuring uniform powder feeding. Furthermore, at the connection between the discharge pipe 150 and the connecting pipe 190, the extension of the connecting pipe 190 will reduce the ventilation diameter of the discharge pipe 150, resulting in a siphon effect where the powder can be quickly blown out by the airflow. Figure 3 The direction of the middle arrow indicates the direction of the airflow.

[0059] In one possible embodiment, the bending angle of the connecting pipe 190 is 40°.

[0060] In some embodiments, optionally, such as Figure 1 As shown, the powder supply device 100 also includes a slide gate valve 180, which is installed between the hopper 120 and the feed pipe 130. The slide gate valve 180 can switch between an open state and a closed state. When the slide gate valve 180 is in the open state, the hopper 120 is connected to the feed pipe 130. When the slide gate valve 180 is in the closed state, the slide gate valve 180 isolates the hopper 120 from the feed pipe 130.

[0061] In this embodiment, the structure of the powder supply device 100 is further defined. The powder supply device 100 also includes a gate valve 180, which is used to control the connection or blockage between the hopper 120 and the feed pipe 130. Specifically, the gate valve 180 is installed between the hopper 120 and the feed pipe 130, and the gate valve 180 has a movable valve plate that can move between an open position and a closed position. When the valve plate is in the closed position, the valve plate blocks the connection between the hopper 120 and the feed pipe 130, and the powder cannot flow from the hopper 120 into the feed pipe 130. At this time, the gate valve 180 is in a closed state. When the valve plate moves to the open position, the valve plate no longer blocks the connection between the hopper 120 and the feed pipe 130, the hopper 120 and the feed pipe 130 are connected, and the powder can flow into the feed pipe 130. At this time, the gate valve 180 is in an open state.

[0062] By installing a gate valve 180 between the hopper 120 and the feed pipe 130, the connection or blockage between the hopper 120 and the feed pipe 130 can be controlled by switching the state of the gate valve 180, thereby controlling whether to discharge materials.

[0063] In one embodiment of this application, an asphalt fume purification system is also proposed, comprising: a reaction device in which asphalt fume is collected; a powder supply device 100 as proposed in any of the above embodiments, wherein the discharge pipe 150 of the powder supply device 100 is connected to the reaction device and the discharge pipe 150 is capable of discharging powder into the reaction device so that the powder purifies the asphalt fume.

[0064] The asphalt fume purification system proposed in this embodiment can purify asphalt fumes by adsorbing harmful substances in the asphalt fumes with powder. The asphalt fume purification system includes a reaction device and a powder supply device 100. The reaction device collects the asphalt fumes to be purified. The discharge pipe 150 of the powder supply device 100 is connected to the reaction device, and the powder supply device 100 blows powder into the reaction device through the discharge pipe 150, mixing the powder with the asphalt fumes to achieve purification.

[0065] The asphalt fume purification system proposed in this embodiment includes the powder supply device 100 proposed in any of the above embodiments, and therefore has all the beneficial effects of the powder supply device 100 proposed in any of the above embodiments.

[0066] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0068] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A powder supply device, characterized in that, include: Mounting rack; A hopper, installed on the mounting frame, is used to store powder materials; A feed pipe is connected to the hopper, and the height of the feed pipe is lower than that of the hopper. The unloader is connected to the end of the feed pipe furthest from the hopper; The discharge pipe is connected to the unloader, which can discharge the powder in the feed pipe into the discharge pipe; A powder feeding blower is connected to the discharge pipe, and the powder feeding blower can blow air into the discharge pipe to blow out the powder in the discharge pipe; A blowing device is connected to the hopper and the feed pipe, and the blowing device is capable of blowing air into the hopper and the feed pipe.

2. The powder supply device according to claim 1, characterized in that, The blowing device includes: A gas storage cylinder containing compressed gas; At least one first air supply pipe is installed in the silo, one end of the first air supply pipe is connected to the air storage cylinder, and the other end extends into the silo, and the compressed gas in the air storage cylinder can be sent into the silo through the first air supply pipe; At least one second air supply pipe is installed on the feed pipe, one end of the second air supply pipe is connected to the air storage cylinder, and the other end extends into the feed pipe, so that the compressed gas in the air storage cylinder can be sent into the feed pipe through the second air supply pipe.

3. The powder supply device according to claim 2, characterized in that, The hopper has a tapered discharge component at one end near the feed pipe. The cross-sectional size of the tapered discharge component gradually decreases along the direction toward the feed pipe, and the first air supply pipe extends into the tapered discharge component.

4. The powder supply device according to claim 2, characterized in that, The first air supply pipe extends into the hopper and has multiple first air outlets on its pipe wall, and the second air supply pipe extends into the feed pipe and has multiple second air outlets on its pipe wall.

5. The powder supply device according to claim 2, characterized in that, The portion of the first air supply pipe inside the hopper extends at an angle from high to low, and the portion of the second air supply pipe inside the feed pipe also extends at an angle from high to low.

6. The powder supply device according to claim 2, characterized in that, The blowing device further includes: Multiple electromagnetic pulse valves are respectively installed between the first air supply pipe and the air storage cylinder and between the second air supply pipe and the air storage cylinder. The electromagnetic pulse valves can open and close the first air supply pipe and the second air supply pipe.

7. The powder supply device according to any one of claims 1 to 6, characterized in that, The feed pipe has a conical structure, and its cross-sectional dimensions gradually decrease along the direction away from the hopper.

8. The powder supply device according to any one of claims 1 to 6, characterized in that, Also includes: A connecting pipe, one end of which is connected to the unloader and the other end of which is connected to the discharge pipe and extends into the discharge pipe, wherein the portion of the connecting pipe extending into the discharge pipe is bent away from the powder feeding fan.

9. The powder supply device according to any one of claims 1 to 6, characterized in that, Also includes: A slide gate valve is installed between the hopper and the feed pipe. The slide gate valve can switch between an open state and a closed state. When the slide gate valve is in the open state, the hopper is connected to the feed pipe. When the slide gate valve is in the closed state, the slide gate valve isolates the hopper from the feed pipe.

10. An asphalt fume purification system, characterized in that, include: A reaction apparatus, wherein asphalt fumes are collected within the reaction apparatus; According to any one of claims 1 to 9, the powder supply device has a discharge pipe connected to the reaction device, and the discharge pipe is capable of discharging powder into the reaction device so that the powder can purify the asphalt fumes.

Images