Pneumatic conveying system and using method thereof

Abstract

The invention provides a pneumatic conveying system and a using method thereof.The pneumatic conveying system comprises a feeding unit, a first gas-solid separator, a second gas-solid separator,... and an Mth gas-solid separator, and M is an integer larger than 1; the feeding unit comprises a feeding device, a feeding main pipe, a first feeding branch pipe, a second feeding branch pipe,..., and an Mth feeding branch pipe. The feeding main pipe is connected to a discharging port of the feeding device. One end of the first feeding branch pipe is connected to the feeding main pipe, and the other end of the first feeding branch pipe is connected to the first gas-solid separator; one end of the second feeding branch pipe is connected to the feeding main pipe, and the other end of the second feeding branch pipe is connected to the second gas-solid separator; ...; one end of the Mth feeding branch pipe is connected to the feeding main pipe, and the other end of the Mth feeding branch pipe is connected to the Mth gas-solid separator. According to the conveying device, different types of materials can be conveyed through different conveying pipelines, and therefore the quality or purity of the conveyed materials is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of powder and granular material conveying technology, specifically relating to a pneumatic conveying system and its usage method. Background Technology

[0002] Pneumatic conveying is widely used for transporting powdery and granular materials such as grain samples due to its flexible pipeline layout and ease of closed conveying. However, existing pneumatic conveying systems typically use only one conveying pipeline. After each material transport, material residue can easily form inside the pipeline, contaminating different types of materials transported in the next batch. This results in a drawback where the quality or purity of the transported materials cannot be guaranteed. Summary of the Invention

[0003] This invention provides a pneumatic conveying system and its usage method, which can transport different types of materials through different conveying pipelines, thereby ensuring the quality or purity of the transported materials.

[0004] A pneumatic conveying system includes: a feeding unit and a first gas-solid separator, a second gas-solid separator, ... and an Mth gas-solid separator, where M is an integer greater than 1; The feeding unit includes a feeding device, a main feeding pipe, a first feeding branch pipe, a second feeding branch pipe, ..., an Mth feeding branch pipe, and the main feeding pipe is connected to the outlet of the feeding device; One end of the first feeding branch pipe is connected to the main feeding pipe, and the other end is connected to the first gas-solid separator, so that the material in the feeding device can enter the first gas-solid separator in sequence through the main feeding pipe and the first feeding branch pipe. One end of the second feeding branch pipe is connected to the main feeding pipe, and the other end is connected to the second gas-solid separator, so that the material in the feeding device can enter the second gas-solid separator in sequence through the main feeding pipe and the second feeding branch pipe; … One end of the Mth feed branch pipe is connected to the main feed pipe, and the other end is connected to the Mth gas-solid separator, so that the material in the feeding device can enter the Mth gas-solid separator in sequence through the main feed pipe and the Mth feed branch pipe.

[0005] Preferably, the number of the feeding units is N, where N is an integer greater than 1.

[0006] Preferably, it also includes a first vacuum tube, a second vacuum tube, ... and an Mth vacuum tube; One end of the first vacuum tube is connected to the exhaust port of the first gas-solid separator, and the other end is connected to an external vacuum device. The external vacuum device can vacuum the first feeding branch pipe through the first gas-solid separator to drive the material entering the first feeding branch pipe from the feeding device into the first gas-solid separator. One end of the second vacuum tube is connected to the exhaust port of the second gas-solid separator, and the other end is connected to an external vacuuming device, so that the external vacuuming device can vacuum the first feed branch pipe through the second gas-solid separator, thereby driving the material from the feeding device into the second feed branch pipe into the second gas-solid separator. … One end of the Mth vacuum tube is connected to the exhaust port of the Mth gas-solid separator, and the other end is connected to an external vacuuming device, so that the external vacuuming device can evacuate the Mth feed branch pipe through the Mth gas-solid separator, thereby driving the material entering the Mth feed branch pipe from the feeding device into the Mth gas-solid separator.

[0007] Preferably, it also includes a controller; A feeding valve electrically connected to the controller is provided on the main feeding pipe, so that the controller can control the opening or closing of the feeding valve; A first shut-off valve electrically connected to the controller is provided on the first feed branch pipe so that the controller can control the opening or closing of the first shut-off valve; A second shut-off valve, electrically connected to the controller, is provided on the second feed branch pipe so that the controller can control the second shut-off valve to open or close. … An Mth shut-off valve, electrically connected to the controller, is installed on the Mth feed branch pipe so that the controller can control the opening or closing of the Mth shut-off valve.

[0008] Preferably, when the system includes the first vacuum tube, the second vacuum tube, ... and the Mth vacuum tube, a first negative pressure valve electrically connected to the controller is provided on the first vacuum tube, so that the controller can control the first negative pressure valve to open or close. A second negative pressure valve, electrically connected to the controller, is provided on the second vacuum tube so that the controller can control the second negative pressure valve to open or close. … An Mth negative pressure valve is provided on the Mth vacuum tube and electrically connected to the controller, so that the controller can control the opening or closing of the Mth negative pressure valve.

[0009] Preferably, it also includes a first intake pipe, a second intake pipe, ... and an Mth intake pipe; A first air inlet is provided on the first feeding branch pipe. One end of the first air inlet pipe is connected to the first air inlet, and the other end is in a free state so that external air can enter the first feeding branch pipe through the first air inlet pipe. A first air inlet valve is provided on the first air inlet pipe. The first air inlet valve is electrically connected to the controller so as to open or close under the control of the controller. A second air inlet is provided on the second feeding branch pipe. One end of the second air inlet pipe is connected to the second air inlet, and the other end is in a free state so that external air can enter the second feeding branch pipe through the second air inlet pipe. A second air inlet valve is provided on the second air inlet pipe. The second air inlet valve is electrically connected to the controller so as to open or close under the control of the controller. … An Mth air inlet is provided on the Mth feed branch pipe. One end of the Mth air inlet pipe is connected to the Mth air inlet, and the other end is in a free state, so that external air can enter the Mth feed branch pipe through the Mth air inlet pipe. An Mth air inlet valve is provided on the Mth air inlet pipe. The Mth air inlet valve is electrically connected to the controller to open or close under the control of the controller.

[0010] A method of using a pneumatic conveying system, employing any of the above-mentioned technical features, wherein the number of feeding units in the pneumatic conveying system is N, where N is an integer greater than 1, including: Material feeding path establishment steps: Establish the working feeding unit, the working gas-solid separator, and the working feeding branch pipe in the working feeding unit that corresponds to the working gas-solid separator; Feeding steps: The material in the working feeding unit is transported to the working gas-solid separator through the working feeding branch pipe.

[0011] Preferably, when the pneumatic conveying system includes a controller, a feed valve electrically connected to the controller is provided on the main feed pipe, a first shut-off valve electrically connected to the controller is provided on the first feed branch pipe, a second shut-off valve electrically connected to the controller is provided on the second feed branch pipe, ..., and an Mth shut-off valve electrically connected to the controller is provided on the Mth feed branch pipe, The feeding process includes the following steps: S110, The controller controls the working shut-off valve installed on the working feed branch pipe to open; S140, The controller controls the opening of the working feed valve in the working feed unit.

[0012] Preferably, when the pneumatic conveying system includes a first vacuum tube, a second vacuum tube, ... and an Mth vacuum tube, and a first negative pressure valve electrically connected to the controller is provided on the first vacuum tube, a second negative pressure valve electrically connected to the controller is provided on the second vacuum tube, ..., and an Mth negative pressure valve electrically connected to the controller is provided on the Mth vacuum tube, Between steps S110 and S140, the following is included: Step S120: The controller controls the opening of the working negative pressure valve corresponding to the working gas-solid separator.

[0013] Preferably, when the pneumatic conveying system includes a first air inlet pipe, a second air inlet pipe, ... and an Mth air inlet pipe, and a first air inlet valve electrically connected to the controller is provided on the first air inlet pipe, a second air inlet valve electrically connected to the controller is provided on the second air inlet pipe, ..., and an Mth air inlet valve electrically connected to the controller is provided on the Mth air inlet pipe, Step S120 further includes the controller controlling the opening of the working air inlet valve corresponding to the working feed branch pipe and other air inlet valves in the first feeding unit.

[0014] Preferably, Between step S120 and step S140, the following is also included: In step S130, the controller controls the working air inlet valve corresponding to the working feed branch pipe and other air inlet valves in the first feeding unit to close.

[0015] Preferably, a cleaning step is included after the feeding step, the cleaning step comprising the steps of: S210, The controller controls the working feed valve to close; S220, The controller controls the opening of other air intake valves in the first feeding unit.

[0016] Preferably, the step S220 is followed by the step: S230. Establish an idle feed branch pipe connected to the working gas-solid separator; S240, The controller controls the working shut-off valve and opens the shut-off valve and air inlet valve corresponding to the idle feed branch pipe.

[0017] Preferably, the working gas-solid separator has a solid discharge port at the bottom, and a discharge valve is provided on the solid discharge port, the discharge valve being electrically connected to the controller; The cleaning step is followed by a discharge step, which includes: S310, The controller controls the working negative pressure valve to close; S320. The controller controls the discharge valve to open based on the air pressure information inside the working feed branch pipe.

[0018] The pneumatic conveying system provided by the present invention employs a technical solution in which one end of the first feeding branch pipe is connected to the main feeding pipe and the other end is connected to the first gas-solid separator, one end of the second feeding branch pipe is connected to the main feeding pipe and the other end is connected to the second gas-solid separator, ... and one end of the Mth feeding branch pipe is connected to the main feeding pipe and the other end is connected to the Mth gas-solid separator. This solution enables the transport of different types of materials through different conveying pipelines, thereby ensuring the quality or purity of the transported materials. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the pneumatic conveying system in Embodiment 1; Figure 2 yes Figure 1 A schematic diagram of the circuit connections; Figure 3 This is a flowchart illustrating the usage method of the pneumatic conveying system in Example 2; Figure 4 yes Figure 3 Flowchart of material supply steps; Figure 5 yes Figure 3 Flowchart of cleaning steps; Figure 6 yes Figure 3 Flowchart of material discharge steps.

[0020] The reference numerals in the figure are as follows: 1-Feeding unit; 2-First gas-solid separator; 3-Second gas-solid separator; 4-Feeding device; 5-Main feeding pipe; 6-First feeding branch pipe; 7-Second feeding branch pipe; 8-First feeding unit; 9-Second feeding unit; 10-First vacuum tube; 11-Second vacuum tube; 12-Controller; 13-Feeding valve; 14-First shut-off valve; 15-Second shut-off valve; 16-First negative pressure valve; 17-Second negative pressure valve; 18-First air inlet pipe; 19-Second air inlet pipe; 20-First air inlet valve; 21-Second air inlet valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] Example 1

[0023] like Figure 1 As shown, a pneumatic conveying system includes: a feeding unit 1 and a first gas-solid separator 2, a second gas-solid separator 3, ... and an Mth gas-solid separator (not shown), where M is an integer greater than 1. The feeding unit 1 includes a feeding device 4, a main feeding pipe 5, a first feeding branch pipe 6, a second feeding branch pipe 7, ..., an Mth feeding branch pipe (not shown), and the main feeding pipe 5 is connected to the outlet of the feeding device 4. One end of the first feeding branch pipe 6 is connected to the main feeding pipe 5, and the other end is connected to the first gas-solid separator 2, so that the material in the feeding device 4 can enter the first gas-solid separator 2 in sequence through the main feeding pipe 5 and the first feeding branch pipe 6; one end of the second feeding branch pipe 7 is connected to the main feeding pipe 5, and the other end is connected to the second gas-solid separator 3, so that the material in the feeding device 4 can enter the second gas-solid separator 3 in sequence through the main feeding pipe 5 and the second feeding branch pipe 7; ...; one end of the Mth feeding branch pipe is connected to the main feeding pipe 5, and the other end is connected to the Mth gas-solid separator, so that the material in the feeding device 4 can enter the Mth gas-solid separator in sequence through the main feeding pipe 5 and the Mth feeding branch pipe. This technical solution enables different materials to be transported to different gas-solid separators through different feed branch pipes, thereby avoiding cross-contamination between different types of materials caused by transporting different types of materials sequentially through the same feed branch pipe. This ensures the quality or purity of the transported materials and also has the advantages of reasonable design and simple structure.

[0024] The number of feeding units 1 is N, where N is an integer greater than 1. Figure 1 The number of feeding units 1 shown is two, namely the first feeding unit 8 and the second feeding unit 9. This forms a matrix network for the pneumatic conveying system, creating a multi-input, multi-output, configurable negative pressure conveying network that flexibly adapts to complex processes involving multiple sources of materials and multiple target devices. The structure and control logic can be naturally extended to multi-source, multi-purpose scenarios, exhibiting strong versatility and scalability, and is suitable for high-cleanliness applications such as intelligent sample conveying.

[0025] In actual production, such as Figure 1As shown, it also includes a first vacuum tube 10, a second vacuum tube 11, ... and an Mth vacuum tube. One end of the first vacuum tube 10 is connected to the exhaust port of the first gas-solid separator 2, and the other end is connected to an external vacuuming device (not shown in the figure). The external vacuuming device can evacuate the first feed branch pipe 6 through the first gas-solid separator 2 to drive the material entering the first feed branch pipe 6 from the feeding device into the first gas-solid separator 2. One end of the second vacuum tube 11 is connected to the exhaust port of the second gas-solid separator 3, and the other end is connected to an external vacuuming device so that the external vacuuming device can evacuate the first feed branch pipe 6 through the second gas-solid separator 3 to drive the material entering the second feed branch pipe 7 from the feeding device into the second gas-solid separator 3. ... One end of the Mth vacuum tube is connected to the exhaust port of the Mth gas-solid separator, and the other end is connected to an external vacuuming device so that the external vacuuming device can evacuate the Mth feed branch pipe through the Mth gas-solid separator to drive the material entering the Mth feed branch pipe from the feeding device into the Mth gas-solid separator. During operation, the material transport can be powered by the vacuuming effect of external vacuum equipment.

[0026] As one possible implementation method, such as Figure 1 , 2 As shown, it also includes a controller 12. A feed valve 13, electrically connected to the controller 12, is installed on the main feed pipe 5, allowing the controller 12 to control the opening and closing of the feed valve 13. A first shut-off valve 14, electrically connected to the controller 12, is installed on the first feed branch pipe 6, allowing the controller 12 to control the opening and closing of the first shut-off valve 14; a second shut-off valve 15, electrically connected to the controller 12, is installed on the second feed branch pipe 7, allowing the controller 12 to control the opening and closing of the second shut-off valve 15; ...; an Mth shut-off valve, electrically connected to the controller 12, is installed on the Mth feed branch pipe, allowing the controller 12 to control the opening and closing of the Mth shut-off valve. The controller 12 is a programmable logic controller (PLC). In practical operation, if the controller 12 confirms that the first feeding branch pipe 6 should be in the working state, while the second feeding branch pipe 7, ..., the Mth feeding branch pipe should be in the non-working state, the controller 12 controls the first shut-off valve 14 on the first feeding branch pipe 6, which should be in the working state, to open. At this time, the first feeding branch pipe 6 is in the conducting state, and can transport materials. At the same time, the controller controls the second shut-off valve on the second feeding branch pipe 7, ..., the Mth shut-off valve on the Mth feeding branch pipe to close. At this time, the second feeding branch pipe 7, ..., the Mth feeding branch pipe are all in the shut-off state and cannot transport materials. This allows for precise adjustment of the working state of each feeding branch pipe, resulting in a high degree of automation.

[0027] Furthermore, such as Figure 1 , 2As shown, when the system includes a first vacuum tube 10, a second vacuum tube 11, ..., and an Mth vacuum tube, a first negative pressure valve 16 electrically connected to the controller 12 is provided on the first vacuum tube 10, so that the controller 12 can control the first negative pressure valve 16 to open or close; a second negative pressure valve 17 electrically connected to the controller 12 is provided on the second vacuum tube 11, so that the controller 12 can control the second negative pressure valve 17 to open or close; ...; an Mth negative pressure valve electrically connected to the controller 12 is provided on the Mth vacuum tube, so that the controller 12 can control the Mth negative pressure valve to open or close. In actual operation, if the controller 12 confirms that the first feed branch pipe 6 and its corresponding first gas-solid separator 2 should be in working condition, while the second feed branch pipe 7, ..., the Mth feed branch pipe and their respective corresponding second gas-solid separators 3, ..., the Mth gas-solid separator should be in non-working condition, the controller 12 controls the first negative pressure valve 16 to open, and simultaneously controls the second negative pressure valve 17, ..., the Mth negative pressure valve to close.

[0028] As a preferred implementation method, such as Figure 1 , 2As shown, it also includes a first air inlet pipe 18, a second air inlet pipe 19, ... and an Mth air inlet pipe. A first air inlet hole (not shown) is provided on the first feed branch pipe 6. One end of the first air inlet pipe 18 is connected to the first air inlet hole, and the other end is in a free state, so that external air can enter the first feed branch pipe 6 through the first air inlet pipe 18. A first air inlet valve 20 is provided on the first air inlet pipe 18. The first air inlet valve 20 is electrically connected to the controller 12 to open or close under the control of the controller 12. A second air inlet hole (not shown) is provided on the second feed branch pipe 7. One end of the second air inlet pipe 19 is connected to the second air inlet hole, and the other end is in a free state, so that external air can enter the first feed branch pipe 6 through the first air inlet pipe 18. The air can enter the second feeding branch pipe 7 through the second air inlet pipe 19. A second air inlet valve 21 is provided on the second air inlet pipe 19. The second air inlet valve 21 is electrically connected to the controller 12 so as to open or close under the control of the controller 12; ...; An Mth air inlet hole is provided on the Mth feeding branch pipe. One end of the Mth air inlet pipe is connected to the Mth air inlet hole, and the other end is in a free state so that external air can enter the Mth feeding branch pipe through the Mth air inlet pipe. An Mth air inlet valve is provided on the Mth air inlet pipe. The Mth air inlet valve is electrically connected to the controller 12 so as to open or close under the control of the controller 12. In actual operation, if the controller 12 confirms that the first feeding branch pipe 6 should be in working condition, while the second feeding branch pipe 7, ..., the Mth feeding branch pipe should be in non-working condition, the controller 12 controls the first air inlet valve 20 to open, and at the same time controls the second air inlet valve 21, ..., the Mth negative pressure valve to close. At this time, external air enters the first feeding branch pipe 6 through the first air inlet pipe 18 and adjusts the air pressure (negative pressure) value in the first feeding branch pipe 6, thereby ensuring the uniformity and stability of material transportation in the first feeding branch pipe 6.

[0029] The pneumatic conveying system in this embodiment establishes a multi-inlet, multi-outlet, configurable negative pressure conveying network, which can flexibly adapt to complex processes involving multiple sources of materials and multiple target devices. Its structure and control logic can be naturally extended to multi-source, multi-target scenarios, and it has strong versatility and scalability, making it suitable for high-cleanliness applications such as intelligent sample conveying.

[0030] Example 2

[0031] A method of using a pneumatic conveying system, employing the pneumatic conveying system described in Embodiment 1, wherein the number of feeding units in the pneumatic conveying system is N, where N is an integer greater than 1. For example... Figure 3 As shown, the usage method includes: The steps for establishing the material feeding path are as follows: Establish the working material feeding unit, the working gas-solid separator, and the working feed branch pipe in the working material feeding unit that corresponds to the working gas-solid separator. Feeding steps: The material in the working feeding unit is transported to the working gas-solid separator through the working feeding branch pipe.

[0032] See Figure 1 In this embodiment, the first feeding unit 8 can be defined as the working feeding unit, the first gas-solid separator as the working gas-solid separator, and the first feeding branch pipe 6 in the first feeding unit 8 as the working feeding branch pipe.

[0033] Specifically, when the pneumatic conveying system includes a controller, a feeding valve electrically connected to the controller is installed on the main feeding pipe, a first shut-off valve electrically connected to the controller is installed on the first feeding branch pipe, a second shut-off valve electrically connected to the controller is installed on the second feeding branch pipe, ..., and an Mth shut-off valve electrically connected to the controller is installed on the Mth feeding branch pipe, such as Figure 4 As shown, the feeding process includes the following steps: S110, The controller controls the opening of the working shut-off valve set on the working feed branch pipe; S140, The controller controls the opening of the working feed valve in the working feed unit.

[0034] It should be noted that all shut-off valves, air inlet valves, and negative pressure valves in the system are closed before the feeding step begins. See Figure 1 The working shut-off valve in step S110 refers to the first shut-off valve 14 installed on the first feed branch pipe 6 in the first feeding unit 8. When this valve is opened, the first feed branch pipe 6 in the first feeding unit 8 is in a conductive state and can transport materials. The working feed valve in step 130 refers to the feed valve 13 in the first feeding unit 8. When this valve is opened, the material in the feed device 4 in the first feeding unit 8 can enter the first feed branch pipe 6 through the feed pipe 5 for transportation.

[0035] Furthermore, when the pneumatic conveying system includes a first vacuum tube, a second vacuum tube, ... and an Mth vacuum tube, and a first negative pressure valve electrically connected to the controller is installed on the first vacuum tube, a second negative pressure valve electrically connected to the controller is installed on the second vacuum tube, ..., and an Mth negative pressure valve electrically connected to the controller is installed on the Mth vacuum tube, ... Figure 4 As shown, the process between steps S110 and S140 includes: Step S120: The controller opens the working negative pressure valve corresponding to the working gas-solid separator.

[0036] See Figure 1 In step S120, the working negative pressure valve is the first negative pressure valve 16 in the first feeding unit 8. After the valve is opened, the external vacuuming equipment can evacuate the first feeding branch pipe 6 through the first gas-solid separator 2.

[0037] Preferably, when the pneumatic conveying system includes a first air inlet pipe, a second air inlet pipe, ... and an Mth air inlet pipe, and a first air inlet valve electrically connected to the controller is provided on the first air inlet pipe, a second air inlet valve electrically connected to the controller is provided on the second air inlet pipe, ... and an Mth air inlet valve electrically connected to the controller is provided on the Mth air inlet pipe, step S120 further includes the controller controlling the opening of the working air inlet valve corresponding to the working feed branch pipe and other air inlet valves in the first feeding unit, wherein the working air inlet valve and other air inlet valves can be opened sequentially before the working negative pressure valve is opened, or the working air inlet valve and other air inlet valves are opened simultaneously with the working negative pressure valve.

[0038] See Figure 1 The working air intake valve is the first air intake valve 20 in the first feeding unit 8. At this time, the other air intake valves are one or more of the air intake valves 21, ..., M. During step 120, the feeding valve 13 is closed and the first air intake valve 20 is open. Air can enter the first feeding branch pipe 6 through the first air intake pipe 18 and other air intake pipes (which can be one or more of the second air intake pipe 19, ..., M). This can establish a stable high-speed airflow channel within the first feeding branch pipe 6 before proceeding to step S140. This can prevent the material from directly entering the first feeding branch pipe 6 and causing blockage.

[0039] Furthermore, between steps S120 and S140, step S130 is also included, in which the controller controls the working air inlet valve corresponding to the working feed branch pipe and other air inlet valves in the first feeding unit to close.

[0040] As one possible implementation method, such as Figure 3 As shown, a cleaning step is included after the feeding step, such as... Figure 5 As shown, the cleaning process includes the following steps: S210, The controller closes the working feed valve; S220, the controller controls the opening of other air inlet valves in the working feeding unit.

[0041] Reference Figure 1At this point, since the material no longer enters the first feed branch pipe 6, the first feed branch pipe 6 becomes a pure air conveying system. External airflow enters the first feed branch pipe 6 through other inlet pipes besides the first inlet pipe 18 (i.e., the second inlet pipe 19, ..., the Mth inlet pipe), moving at high speed and blowing any residual material in the first feed branch pipe 6 into the first gas-solid separator 2. This allows for automatic cleaning of the inside of the first feed branch pipe 6 without manual operation, significantly reducing material residue and cross-contamination within the first feed branch pipe 6. It should be noted that in actual operation, the order of opening the other inlet valves is: second inlet valve, ..., the Mth inlet valve.

[0042] Furthermore, after step S220, the following is also included: S230. Establish an idle feed branch pipe connected to the working gas-solid separator; S240, the controller controls the working shut-off valve to close, and opens the shut-off valve and air inlet valve corresponding to the idle feed branch pipe.

[0043] Reference Figure 1 The idle feed branch pipe is the first feed branch pipe 6 in the second feed unit 9. At this time, the first feed branch pipe 6 in the second feed unit 9 is in an idle state. In this way, the airflow in the first feed branch pipe 6 of the second feed unit 9 can be used to perform secondary cleaning of the inlet main pipe of the first gas-solid separator 2 to ensure that there is no risk of cross-contamination at the junction.

[0044] As one possible implementation, the working gas-solid separator has a solid discharge port at the bottom. Figure 1 (Not shown in the image), a discharge valve is installed at the solid discharge port ( Figure 1 (not shown in the image), the discharge valve is electrically connected to the controller; like Figure 3 As shown, a material discharge step is included after the cleaning step, such as... Figure 6 As shown, the material discharge steps include: S310, The controller controls the negative pressure valve to close; S320: The controller controls the opening of the discharge valve based on the air pressure information inside the working feed branch pipe.

[0045] This ensures that all solid material is discharged from the working gas-solid separator after the cleaning step, preventing any residue from remaining in the separator. It should be noted that in actual operation, the discharge step begins after a 5-10 second delay following the completion of the cleaning step.

[0046] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A pneumatic conveying system, characterized in that: include: The feeding unit (1) and the first gas-solid separator (2), the second gas-solid separator (3), ... and the Mth gas-solid separator, where M is an integer greater than 1; The feeding unit (1) includes a feeding device (4), a feeding main pipe (5), a first feeding branch pipe (6), a second feeding branch pipe (7), ..., the Mth feeding branch pipe, and the feeding main pipe (5) is connected to the outlet of the feeding device (4); One end of the first feed branch pipe (6) is connected to the feed main pipe (5), and the other end is connected to the first gas-solid separator (2), so that the material in the feed device (4) can enter the first gas-solid separator (2) in sequence through the feed main pipe (5) and the first feed branch pipe (6); One end of the second feed branch pipe (7) is connected to the feed main pipe (5), and the other end is connected to the second gas-solid separator (3), so that the material in the feeding device (4) can enter the second gas-solid separator (3) in sequence through the feed main pipe (5) and the second feed branch pipe (7); … One end of the Mth feed branch pipe is connected to the feed main pipe (5), and the other end is connected to the Mth gas-solid separator, so that the material in the feed device (4) can enter the Mth gas-solid separator in sequence through the feed main pipe (5) and the Mth feed branch pipe.

2. The pneumatic conveying system according to claim 1, characterized in that: The number of the feeding units (1) is N, where N is an integer greater than 1.

3. The pneumatic conveying system according to claim 1, characterized in that: It also includes a first vacuum tube (10), a second vacuum tube (11), ... and an Mth vacuum tube; One end of the first vacuum tube (10) is connected to the exhaust port of the first gas-solid separator (2), and the other end is connected to an external vacuum device. The external vacuum device can vacuum the first feed branch pipe (6) through the first gas-solid separator (2) to drive the material that enters the first feed branch pipe (6) from the feeding device into the first gas-solid separator (2). One end of the second vacuum tube (11) is connected to the exhaust port of the second gas-solid separator (3), and the other end is connected to an external vacuuming device so that the external vacuuming device can vacuum the first feed branch pipe (6) through the second gas-solid separator (3) to drive the material from the feeding device into the second feed branch pipe (7) into the second gas-solid separator (3). … One end of the Mth vacuum tube is connected to the exhaust port of the Mth gas-solid separator, and the other end is connected to an external vacuuming device, so that the external vacuuming device can evacuate the Mth feed branch pipe through the Mth gas-solid separator, thereby driving the material entering the Mth feed branch pipe from the feeding device into the Mth gas-solid separator.

4. The pneumatic conveying system according to any one of claims 1 to 3, characterized in that: It also includes a controller (12); A feeding valve (13) electrically connected to the controller (12) is provided on the feeding main pipe (5) so that the controller (12) can control the feeding valve (13) to open or close. A first shut-off valve (14) electrically connected to the controller (12) is provided on the first feed branch pipe (6) so that the controller (12) can control the first shut-off valve (14) to open or close. A second shut-off valve (15) electrically connected to the controller (12) is provided on the second feed branch pipe (7) so that the controller (12) can control the second shut-off valve (15) to open or close. … An M-th shut-off valve is provided on the M-th feed branch pipe and is electrically connected to the controller (12) so that the controller (12) can control the M-th shut-off valve to open or close.

5. The pneumatic conveying system according to claim 4, characterized in that: When the first vacuum tube (10), the second vacuum tube (11), ... and the Mth vacuum tube are included, a first negative pressure valve (16) electrically connected to the controller (12) is provided on the first vacuum tube (10) so that the controller (12) can control the first negative pressure valve (16) to open or close. A second negative pressure valve (17) electrically connected to the controller (12) is provided on the second vacuum tube (11) so that the controller (12) can control the second negative pressure valve (17) to open or close. … An Mth negative pressure valve is provided on the Mth vacuum tube and electrically connected to the controller (12) so that the controller (12) can control the Mth negative pressure valve to open or close.

6. The pneumatic conveying system according to claim 5, characterized in that: It also includes a first intake pipe (18), a second intake pipe (19), ... and an Mth intake pipe; A first air inlet is provided on the first feed branch pipe (6). One end of the first air inlet pipe (18) is connected to the first air inlet, and the other end is in a free state so that external air can enter the first feed branch pipe (6) through the first air inlet pipe (18). A first air inlet valve (20) is provided on the first air inlet pipe (18). The first air inlet valve (20) is electrically connected to the controller (12) so as to open or close under the control of the controller (12). A second air inlet is provided on the second feeding branch pipe (7). One end of the second air inlet pipe (19) is connected to the second air inlet, and the other end is in a free state so that external air can enter the second feeding branch pipe (7) through the second air inlet pipe (19). A second air inlet valve (21) is provided on the second air inlet pipe (19). The second air inlet valve (21) is electrically connected to the controller (12) so as to open or close under the control of the controller (12). … An Mth air inlet is provided on the Mth feed branch pipe. One end of the Mth air inlet pipe is connected to the Mth air inlet, and the other end is in a free state so that external air can enter the Mth feed branch pipe through the Mth air inlet pipe. An Mth air inlet valve is provided on the Mth air inlet pipe. The Mth air inlet valve is electrically connected to the controller (12) so as to open or close under the control of the controller (12).

7. A method of using a pneumatic conveying system, comprising using the pneumatic conveying system as described in any one of claims 1 to 6, wherein the number of feeding units in the pneumatic conveying system is N, where N is an integer greater than 1, characterized in that: Including the following steps: Material feeding path establishment steps: Establish the working feeding unit, the working gas-solid separator, and the working feeding branch pipe in the working feeding unit that corresponds to the working gas-solid separator; Feeding steps: The material in the working feeding unit is transported to the working gas-solid separator through the working feeding branch pipe.

8. The method of using the pneumatic conveying system according to claim 7, characterized in that: When the pneumatic conveying system includes a controller, a feeding valve electrically connected to the controller is provided on the main feeding pipe, a first shut-off valve electrically connected to the controller is provided on the first feeding branch pipe, a second shut-off valve electrically connected to the controller is provided on the second feeding branch pipe, ..., and an Mth shut-off valve electrically connected to the controller is provided on the Mth feeding branch pipe, the feeding step includes the following steps: S110, The controller controls the working shut-off valve installed on the working feed branch pipe to open; S140, The controller controls the opening of the working feed valve in the working feed unit.

9. The method of using the pneumatic conveying system according to claim 8, characterized in that: When the pneumatic conveying system includes a first vacuum tube, a second vacuum tube, ... and an Mth vacuum tube, and a first negative pressure valve electrically connected to the controller is provided on the first vacuum tube, a second negative pressure valve electrically connected to the controller is provided on the second vacuum tube, ..., and an Mth negative pressure valve electrically connected to the controller is provided on the Mth vacuum tube; the process between steps S110 and S140 includes: Step S120: The controller controls the opening of the working negative pressure valve corresponding to the working gas-solid separator.

10. The method of using the pneumatic conveying system according to claim 8, characterized in that: When the pneumatic conveying system includes a first air inlet pipe, a second air inlet pipe, ... and an Mth air inlet pipe, and a first air inlet valve electrically connected to the controller is provided on the first air inlet pipe, a second air inlet valve electrically connected to the controller is provided on the second air inlet pipe, ... and an Mth air inlet valve electrically connected to the controller is provided on the Mth air inlet pipe, step S120 further includes: the controller controlling the opening of the working air inlet valve corresponding to the working feed branch pipe and other air inlet valves in the first feeding unit.

11. The method of using the pneumatic conveying system according to claim 10, characterized in that: Between step S120 and step S140, the following is also included: In step S130, the controller controls the working air inlet valve corresponding to the working feed branch pipe and other air inlet valves in the first feeding unit to close.

12. The method of using the pneumatic conveying system according to claim 11, characterized in that: The feeding step is followed by a cleaning step, which includes the following steps: S210, The controller controls the working feed valve to close; S220, The controller controls the opening of other air intake valves in the working feeding unit.

13. The method of using the pneumatic conveying system according to claim 12, characterized in that: The step S220 is followed by the following step: S230. Establish an idle feed branch pipe connected to the working gas-solid separator; S240, The controller controls the working shut-off valve to close, and opens the shut-off valve and air inlet valve corresponding to the idle feed branch pipe.

14. The method of using the pneumatic conveying system according to claim 12 or 13, characterized in that: The working gas-solid separator has a solid discharge port at the bottom, and a discharge valve is provided on the solid discharge port. The discharge valve is electrically connected to the controller. The cleaning step is followed by a discharge step, which includes: S310, The controller controls the working negative pressure valve to close; S320. The controller controls the discharge valve to open based on the air pressure information inside the working feed branch pipe.

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