AU2018417114A1 - Unblocking system and method of pneumatic conveying pipeline - Google Patents
Unblocking system and method of pneumatic conveying pipeline Download PDFInfo
- Publication number
- AU2018417114A1 AU2018417114A1 AU2018417114A AU2018417114A AU2018417114A1 AU 2018417114 A1 AU2018417114 A1 AU 2018417114A1 AU 2018417114 A AU2018417114 A AU 2018417114A AU 2018417114 A AU2018417114 A AU 2018417114A AU 2018417114 A1 AU2018417114 A1 AU 2018417114A1
- Authority
- AU
- Australia
- Prior art keywords
- reverse
- conveying
- pressurizing
- holes
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
An unblocking system and method of a pneumatic conveying pipeline. A pressure measuring system and a reverse pressurizing system are sequentially arranged on a material conveying pipeline in the material flowing direction, wherein the pressure measuring system comprises a pressure measuring pipe and a pressure sensor; and the reverse pressurizing system comprises a reverse pressurizing pipe, an electronically controlled reversing valve, a conveying flow valve, a reverse flow valve, a high-pressure air conveying pipe, and a vacuum pumping pipe. Three pipeline connectors and three annular air chambers are arranged on the reverse pressurizing pipe; the three annular air chambers are respectively provided with a group of whirl holes, a group of pressurizing holes, and a group of reverse whirl holes which open to the interior of the reverse pressurizing pipe. The whirl holes at the rear of the material conveying direction each form an included angle relative to the pipeline in both the axial direction and the radial direction, and the working directions of the whirl holes are the same as the material conveying direction; the pressurizing holes at the middle of the material conveying direction are perpendicular to the axial direction of the pipeline, and the working directions of the pressurizing holes are perpendicular to the material conveying direction; and the reverse whirl holes at the front of the material conveying direction each form an included angle relative to the pipeline in both the axial direction and the radial direction, and the working directions of the reverse whirl holes are opposite to the material conveying direction. The present invention can pressurize and prevent the pipeline from blockage.
Description
UNBLOCKING SYSTEM AND METHOD OF PNEUMATIC CONVEYING PIPELINE
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to an unblocking system and method of a pneumatic conveying pipeline, which are suitable for an air pneumatic conveying system of dilute-phase and dense-phase inert materials.
Description of Related Art
A pneumatic conveying system is a conveying system that conveys powder materials in a pipeline by using an airflow having a certain pressure and a certain speed. In the pneumatic conveying pipeline, a mixed medium of air and powder materials is generally present and belongs to the category of gas-solid two-phase flow. In the pneumatic conveying process, the conveying speed of the materials is gradually reduced due to the friction between the materials and the pipeline and the friction between the materials, and as a result, the materials are blocked at a position with a large pressure loss, such as an elbow pipe or a bifurcated pipe.
Therefore, in the known pneumatic conveying system, in order to alleviate the occurrence of blockage, a pressurizing device is often added to the pneumatic conveying system. However, pipeline blockage may occur when the materials are agglomerated from moisture. In this case, further positive pressurization may make material slugs that block the pipeline more compact. Once the material slugs are stuck in the pipeline, the subsequent materials continue to accumulate, which aggravates pipeline blockage and results in complete blockage of the pipeline, thereby causing accidents such as pneumatic conveying system breakdown. Therefore, timely elimination of the material slugs that cause the blockage is the key to ensure the smooth and efficient conveying of the pneumatic conveying system.
i
SUMMARY OF THE INVENTION
Technical Problem
To overcome the foregoing deficiencies of the prior art, the present invention provides an unblocking system and method of a pneumatic conveying pipeline, which can generate a rapid reverse impact flow field to disperse the blocked material slugs in time while satisfying the normal conveying pressurizing effect, thereby meeting the demand of partial or overall pressurized conveying of pipelines and preventing pipeline blockage accidents.
Technical Solution
The present invention adopts the following technical solution to solve the technical problems:
An unblocking system of a pneumatic conveying pipeline, comprising a material conveying pipeline, wherein a pressure measuring system and a reverse pressurizing system are sequentially mounted on the material conveying pipeline in the material flowing direction. The pressure measuring system comprises a pressure measuring pipe, a dustproof tank, and a pressure sensor. Left and right ends of the pressure measuring pipe are connected to the material conveying pipeline, and a pressure measuring hole is formed at an upper end of the middle part of the pressure measuring pipe; the dustproof tank is mounted on the pressure measuring hole; a filter screen is mounted between the pressure measuring hole and the dustproof tank; and the pressure sensor is mounted on the top of the dustproof tank. The filter screen and the dustproof tank can avoid the conveyed material particles from blocking the pressure measuring hole and prevent the material dust from entering the pressure sensor, thereby affecting the measurement result. The reverse pressurizing system comprises a reverse pressurizing pipe, an electronically controlled reversing valve, a conveying flow valve, a reverse flow valve, a high-pressure air conveying pipe, and a vacuum pumping pipe. Three pipeline connectors and three annular air chambers are arranged on the reverse pressurizing pipe; one ends of the three pipeline connectors are respectively in communication with the three annular air chambers in the reverse pressurizing pipe, and the other ends are respectively connected to an airflow conveying pipeline; the three annular air chambers are respectively provided with a group of whirl holes, a group of pressurizing holes, and a group of reverse whirl holes which open to the interior of the reverse pressurizing pipe. The whirl holes at the rear of the material conveying direction each form an included angle relative to the pipeline in both the axial direction and the radial direction, and the working directions of the whirl holes are the same as the material conveying direction; the pressurizing holes at the middle of the material conveying direction are perpendicular to the axial direction of the pipeline, and the working directions of the pressurizing holes are perpendicular to the material conveying direction; the reverse whirl holes at the front of the material conveying direction each form an included angle relative to the pipeline in both the axial direction and the radial direction, and the working directions of the reverse whirl holes are opposite to the material conveying direction. An interface of the whirl holes is connected to an outlet of the electronically controlled reversing valve; an inlet I of the electronically controlled reversing valve is connected to an outlet of the conveying flow valve, an inlet II of the electronically controlled reversing valve is connected to the vacuum pumping pipe, and an inlet of the conveying flow valve is connected to the high-pressure air conveying pipe; interfaces of the pressurizing holes and the reverse whirl holes are in communication with each other and then connected to an outlet of the reverse flow valve, and an inlet of the reverse flow valve is connected to the high-pressure air conveying pipe. A data acquisition device and a data analysis controller are further comprised. A data output end of the pressure sensor is connected to the data acquisition device via a data transmission line; a control end of the electronically controlled reversing valve is connected to the data analysis controller via a data transmission line; control ends of the conveying flow valve and the reverse flow valve both are connected to the data analysis controller via data transmission lines; and the data acquisition device is connected to the data analysis controller via a data transmission line.
An unblocking method of a pneumatic conveying pipeline, comprising the following steps:
1) sequentially arranging multiple groups of pressure measuring systems and reverse pressurizing systems on a material conveying pipeline in the material flowing direction;
2) transmitting, by the pressure measuring system, the obtained flow field pressure change in the material conveying pipeline to a data acquisition device in real time;
3) transmitting, by the data acquisition device, the acquired pressure data to a data analysis controller;
4) analyzing, by the data analysis controller, the flow field pressure change and comparing with a preset normal pneumatic conveying value;
5) in the normal conveying process, setting a conveying flow valve and a reverse pressurizing valve throughout a pneumatic conveying system in a closed state, and an electronically controlled reversing valve in position I, that is, connecting the conveying flow valve and whirl holes of the reverse pressurizing pipe;
6) in the normal conveying process, when the flow field pressures obtained by the pressure measuring systems at position N and position N+l of the material conveying pipeline are lower than the normal conveying value, and no sudden high flow field pressure occurs throughout the conveying system, opening, by the data analysis controller, the conveying flow valve at an upstream N-l nearest to the N, so that a high-pressure airflow in the high-pressure air conveying pipe enters the whirl holes of the reverse pressurizing pipe at the upstream N-l to produce a whirl pressurized conveying effect;
7) in the normal conveying process, if the flow field pressure obtained by the pressure measuring device at the position N of the material conveying pipeline is suddenly increased, and the flow field pressures at a downstream N+l position and subsequent positions are lower than the normal conveying value, indicating that a pipeline blockage accident will occur in the position N to the downstream N+l position, and closing, by the data analysis controller, the conveying flow valves at positions N+l and N+2, and opening reverse flow valves at positions N and N+l, so that a high-pressure airflow in the high-pressure air conveying pipe enters pressurizing holes and reverse whirl holes of the reverse pressurizing pipes at positions N and N+l, wherein the reverse whirl holes generate a reverse swirling flow to impact a blocked material pile, and the pressurizing holes provide sufficient backpressure and high-pressure air for the reverse swirling flow and prevent materials in a downstream conveying pipe from being sucked into the reverse swirling flow;
8) switching the electronically controlled reversing valve upstream of the position N to position II while opening the reverse swirling flow, that is, connecting a vacuum pumping pipe and the whirl holes of the reverse pressurizing pipe, thereby generating vacuum negative pressure to increase the pressure difference across the blocked material pile and improve the reverse thrust, and discharging excess reverse airflow to prevent problems in subsequent conveying, the process being called reverse impact process; and
9) after one reverse impact is done over a short period of time in a range of 10 ms and 1,000 ms, restoring the material conveying pipeline to the conveying state, and if the case that the flow field pressure is suddenly increased in step 7) continues to occur, further executing steps 7) and step 8) until normal conveying is restored.
Advantageous Effect
Compared with the existing prior art, in the unblocking system and method of a pneumatic conveying pipeline of the present invention, multiple groups of pressure measuring systems and reverse pressurizing systems are sequentially arranged on a material conveying pipeline in the material flowing direction, the pressure field pressures obtained by the pressure measuring systems are transmitted to a data acquisition device and a data analysis controller and compared with a preset normal conveying value, an upstream conveying flow valve nearest to a certain position is opened when the flow field pressures of the certain position and subsequent positions are lower than the normal conveying value, and there is no sudden high flow field pressure throughout the system, so that a high-pressure airflow enters whirl holes of a reverse pressurizing pipe to produce a whirl pressurized conveying effect; two reverse flow valves at a certain position and the downstream nearest position are opened when the flow field pressure of the certain position is suddenly increased, and the flow field pressures at the downstream are lower than the normal conveying valve, so that a reverse impact force is generated to disperse the blocked material pile, and simultaneously, an upstream vacuum pumping pipe nearest to the position and whirl holes of the reverse pressurizing pipe are connected, so that a vacuum negative pressure is generated to increase the differential pressure across the blocked material pile and improve the reverse thrust, and excess reverse airflow is also discharged to prevent problems in subsequent conveying. The present invention can generate a rapid reverse impact flow field to disperse the blocked material slugs while satisfying the normal conveying pressurizing effect, thereby meeting the demand of partial or overall pressurized conveying of pipelines and preventing pipeline blockage accidents, and has strong novelty and wide applicability.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is further described below with reference to the accompanying drawings and embodiments.
FIG. 1 is a schematic structural diagram of an unblocking system according to an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a reverse pressurizing pipe in FIG. 1.
FIG. 3 is a schematic structural diagram of a pressure measuring system in FIG. 1.
In the drawings, 1 high-pressure air conveying pipe, 2 data acquisition device, 3 vacuum pumping pipe, 4 data analysis controller, 5 connection tee, 6 pressure measuring pipe, 6-1 pressure sensor, 6-2 dustproof tank, 6-3 filter screen, 6-4 pressure measuring hole, 7 conveying flow valve, 8 electronically controlled reversing valve, 9 reverse pressurizing pipe, 10 reverse flow valve, 11 material conveying pipeline, 9-1 pipeline connector, 9-2 annular air chamber, 9-3 whirl hole, 9-4 pressurizing hole, 9-5 reverse whirl hole.
DETAILED DESCRIPTION OF THE INVENTION
To make the objectives, technical solutions, and advantages of embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described below clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments without involving any inventive effort are within the protection scope of the present invention.
FIGs. 1-3 are schematic structural diagrams of a preferred embodiment of the present invention. An unblocking system of a pneumatic conveying pipeline in FIG. 1 comprises a material conveying pipeline 11, wherein a pressure measuring system and a reverse pressurizing system are sequentially mounted on the material conveying pipeline 11 in the material flowing direction. The pressure measuring system comprises a pressure measuring pipe 6, a dustproof tank 6-2, and a pressure sensor 6-1. Left and right ends of the pressure measuring pipe 6 are connected to the material conveying pipeline 11 via connecting flanges, and a pressure measuring hole 6-4 is formed at an upper end of the middle part of the pressure measuring pipe 6; the dustproof tank 6-2 is mounted on the pressure measuring hole 6-4; a filter screen 6-3 is mounted between the pressure measuring hole 6-4 and the dustproof tank 6-2; and the pressure sensor 6-1 is mounted on the top of the dustproof tank 6-2. The filter screen 6-3 and the dustproof tank 6-2 can avoid the conveyed material particles from blocking the pressure measuring hole and prevent the material dust from entering the pressure sensor 6-1, thereby affecting the measurement result (as shown in FIG. 3). The reverse pressurizing system comprises a reverse pressurizing pipe 9, an electronically controlled reversing valve 8, a conveying flow valve 7, a reverse flow valve 10, a high-pressure air conveying pipe 1, and a vacuum pumping pipe 3. With reference to FIG. 2, three pipeline connectors 9-1 and three annular air chambers 9-2 are arranged on the reverse pressurizing pipe 9; one ends of the three pipeline connectors 9-1 are respectively in communication with the three annular air chambers 9-2 in the reverse pressurizing pipe 9, and the other ends are respectively connected to an airflow conveying pipeline; the three annular air chambers 9-2 are respectively provided with a group of whirl holes 9-3, a group of pressurizing holes 9-4, and a group of reverse whirl holes 9-5 which open to the interior of the reverse pressurizing pipe 9. The whirl holes 9-3 at the rear of the material conveying direction each form an included angle relative to the pipeline in both the axial direction and the radial direction, and the working directions of the whirl holes 9-3 are the same as the material conveying direction; the pressurizing holes 9-4 at the middle of the material conveying direction are perpendicular to the axial direction of the pipeline, and the working directions of the pressurizing holes 9-4 are perpendicular to the material conveying direction; the reverse whirl holes 9-5 at the front of the material conveying direction each form an included angle relative to the pipeline in both the axial direction and the radial direction, and the working directions of the reverse whirl holes 9-5 are opposite to the material conveying direction. An interface of the whirl holes 9-3 is connected to an outlet of the electronically controlled reversing valve 8; an inlet I of the electronically controlled reversing valve 8 is connected to an outlet of the conveying flow valve 7, an inlet II of the electronically controlled reversing valve 8 is connected to the vacuum pumping pipe 3, and an inlet of the conveying flow valve 7 is connected to the high-pressure air conveying pipe 1; interfaces of the pressurizing holes 9-4 and the reverse whirl holes 9-5 are in communication with each other and then connected to an outlet of the reverse flow valve 10, and an inlet of the reverse flow valve 10 is connected to the high-pressure air conveying pipe 1. A data acquisition device 2 and a data analysis controller 4 are further comprised. A data output end of the pressure sensor 6-1 is connected to the data acquisition device 2 via a data transmission line; a control end of the electronically controlled reversing valve 8 is connected to the data analysis controller 4 via a data transmission line; control ends of the conveying flow valve 7 and the reverse flow valve 10 are connected to the data analysis controller 4 via data transmission lines; and the data acquisition device 2 is connected to the data analysis controller 4 via a data transmission line.
In this embodiment, the material conveying pipeline 11 is preferably provided with multiple groups of pressure measuring systems and reverse pressurizing systems arranged at intervals, thereby providing a better using effect. Specifically, the pressure measuring systems and the reverse pressurizing systems are connected to the material conveying pipeline 11 via a port of the pressure measuring pipe 6 and a port of the reverse pressurizing pipe 9, respectively. Specifically, the pressure measuring pipe 6 and the reverse pressurizing pipe 9 may be connected to the material conveying pipeline 11 via connecting flanges.
Preferably, each group of whirl holes 9-3, each group of pressurizing holes 9-4, and each group of reverse whirl holes 9-5 are arranged on respective annular air chambers 9-2 at uniform intervals; and there are 4-10 holes in each group of whirl holes 9-3, each group of pressurizing holes 9-4 and each group of reverse whirl holes 9-5, respectively.
As a specific implementation, the electronically controlled reversing valve 8 and the vacuum pumping pipe 3, the conveying flow valve 7 and the high-pressure air conveying pipe 1, as well as the reverse flow valve 10 and the high-pressure air conveying pipe 1 may be connected via connection tees 5, respectively.
An unblocking method of a pneumatic conveying pipeline, comprising the following steps:
1) multiple groups of pressure measuring systems and reverse pressurizing systems are sequentially arranged on a material conveying pipeline 11 in the material flowing direction;
2) the pressure measuring system transmits the obtained flow field pressure change in the material conveying pipeline 11 to a data acquisition device 2 in real time;
3) the data acquisition device 2 transmits the acquired pressure data to a data analysis controller 4;
4) the data analysis controller 4 analyzes the flow field pressure change and compares with a preset normal pneumatic conveying value;
5) in the normal conveying process, a conveying flow valve 7 and a reverse pressurizing valve 9 throughout a pneumatic conveying system are in a closed state, and an electronically controlled reversing valve 8 is in position I, that is, the conveying flow valve 7 and whirl holes 9-3 of the reverse pressurizing pipe 9 are connected;
6) in the normal conveying process, when the flow field pressures obtained by the pressure measuring systems at position N and position N+l of the material conveying pipeline 11 are lower than the normal conveying value, and no sudden high flow field pressure occurs throughout the conveying system, the data analysis controller 4 opens the conveying flow valve 7 at an upstream N-l nearest to the N, so that a high-pressure airflow in the high-pressure air conveying pipe 1 enters the whirl holes 9-3 of the reverse pressurizing pipe 9 at the upstream N-l to produce a whirl pressurized conveying effect;
7) in the normal conveying process, if the flow field pressure obtained by the pressure measuring device 6 at the position N of the material conveying pipeline 11 is suddenly increased, and the flow field pressures at a downstream N+l position and subsequent positions are lower than the normal conveying value, it is indicated that a pipeline blockage accident will occur in the position N to the downstream N+l position, and the data analysis controller 4 closes the conveying flow valves 7 at positions N+l and N+2, and opens reverse flow valves 10 at positions N and N+l, so that a high-pressure airflow in the high-pressure air conveying pipe 1 enters pressurizing holes 9-4 and reverse whirl holes 9-5 of the reverse pressurizing pipes 9 at positions N and N+l, wherein the reverse whirl holes 9-5 generate a reverse swirling flow to impact a blocked material pile, and the pressurizing holes 9-4 provide sufficient backpressure and high-pressure air for the reverse swirling flow and prevent materials in a downstream conveying pipe from being sucked into the reverse swirling flow;
8) the electronically controlled reversing valve 8 upstream of the position N is switched to position II while the reverse swirling flow is opened, that is, a vacuum pumping pipe 3 and the whirl holes 9-3 of the reverse pressurizing pipe 9 are connected, so that vacuum negative pressure is generated to increase the pressure difference across the blocked material pile and improve the reverse thrust, and also excess reverse airflow is discharged to prevent problems in subsequent conveying, the process being called reverse impact process; and
9) after one reverse impact is done over a short period of time in a range of 10 ms and 1,000 ms, the material conveying pipeline 11 is restored to the conveying state, and if the case that the flow field pressure is suddenly increased in step 7) continues to occur, steps 7) and step 8) are further executed until normal conveying is restored.
The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way. Any simple modifications and equivalent changes made to the foregoing embodiments in accordance with the io technical spirit of the present invention fall within the protection scope of the present invention.
Claims (9)
1) sequentially arranging multiple groups of pressure measuring systems and reverse pressurizing systems on a material conveying pipeline (11) in the material flowing direction;
1. An unblocking system of a pneumatic conveying pipeline, comprising a material conveying pipeline (11), wherein a pressure measuring system and a reverse pressurizing system are sequentially mounted on the material conveying pipeline (11) in the material flowing direction; the pressure measuring system comprises a pressure measuring pipe (6), a dustproof tank (6-2), and a pressure sensor (6-1); left and right ends of the pressure measuring pipe (6) are connected to the material conveying pipeline (11), and a pressure measuring hole (6-4) is formed at an upper end of a middle part of the pressure measuring pipe (6); the dustproof tank (6-2) is mounted on the pressure measuring hole (6-4); a filter screen (6-3) is mounted between the pressure measuring hole (6-4) and the dustproof tank (6-2); and the pressure sensor (6-1) is mounted on the top of the dustproof tank (6-2);
the reverse pressurizing system comprises a reverse pressurizing pipe (9), an electronically controlled reversing valve (8), a conveying flow valve (7), a reverse flow valve (10), a high-pressure air conveying pipe (1), and a vacuum pumping pipe (3); three pipeline connectors (9-1) and three annular air chambers (9-2) are arranged on the reverse pressurizing pipe (9); one ends of the three pipeline connectors (9-1) are in communication with the three annular air chambers (9-2) in the reverse pressurizing pipe (9) respectively, and the other ends are connected to an airflow conveying pipeline; the three annular air chambers (9-2) are respectively provided with a group of whirl holes (9-3), a group of pressurizing holes (9-4), and a group of reverse whirl holes (9-5) which open to the interior of the reverse pressurizing pipe (9); the whirl holes (9-3) at the rear of the material conveying direction each form an included angle relative to the pipeline in both the axial direction and the radial direction, and the working directions of the whirl holes (9-3) are the same as the material conveying direction; the pressurizing holes (9-4) at the middle of the material conveying direction are perpendicular to the axial direction of the pipeline, and the working directions of the pressurizing holes (9-4) are perpendicular to the material conveying direction; the reverse whirl holes (9-5) at the front of the material conveying direction each form an included angle relative to the pipeline in both the axial direction and the radial direction, and the working directions of the reverse whirl holes (9-5) are opposite to the material conveying direction; an interface of the whirl holes (9-3) is connected to an outlet of the electronically controlled reversing valve (8); an inlet I of the electronically controlled reversing valve (8) is connected to an outlet of the conveying flow valve (7), an inlet II of the electronically controlled reversing valve (8) is connected to the vacuum pumping pipe (3), and an inlet of the conveying flow valve (7) is connected to the high-pressure air conveying pipe (1); interfaces of the pressurizing holes (9-4) and the reverse whirl holes (9-5) are in communication with each other and then connected to an outlet of the reverse flow valve (10), and an inlet of the reverse flow valve (10) is connected to the high-pressure air conveying pipe (1);
a data acquisition device (2) and a data analysis controller (4) are further comprised; a data output end of the pressure sensor (6-1) is connected to the data acquisition device (2) via a data transmission line; a control end of the electronically controlled reversing valve (8) is connected to the data analysis controller (4) via a data transmission line; control ends of the conveying flow valve (7) and the reverse flow valve (10) are connected to the data analysis controller (4) via data transmission lines; and the data acquisition device (2) is connected to the data analysis controller (4) via a data transmission line.
2) transmitting, by the pressure measuring system, the obtained flow field pressure change in the material conveying pipeline (11) to a data acquisition device (2) in real time;
2. The unblocking system of a pneumatic conveying pipeline according to claim 1, wherein the material conveying pipeline (11) is provided with multiple groups of pressure measuring systems and reverse pressurizing systems arranged at intervals; and the pressure measuring systems and the reverse pressurizing systems are connected to the material conveying pipeline (11) via a port of the pressure measuring pipe (6) and a port of the reverse pressurizing pipe (9), respectively.
3) transmitting, by the data acquisition device (2), the acquired pressure data to a data analysis controller (4);
3. The unblocking system of a pneumatic conveying pipeline according to claim 1 or 2, wherein each group of whirl holes (9-3), each group of pressurizing holes (9-4), and each group of reverse whirl holes (9-5) are arranged on respective annular air chambers (9-2) at uniform intervals; and there are 4-10 holes in each group of whirl holes (9-3), each group of pressurizing holes (9-4) and each group of reverse whirl holes (9-5), respectively.
4) analyzing, by the data analysis controller (4), the flow field pressure change and comparing with a preset normal pneumatic conveying value;
4. The unblocking system of a pneumatic conveying pipeline according to claim 3, wherein the electronically controlled reversing valve (8) and the vacuum pumping pipe (3), the conveying flow valve (7) and the high-pressure air conveying pipe (1), as well as the reverse flow valve (10) and the high-pressure air conveying pipe (1) are connected via connection tees (5), respectively.
5) in the normal conveying process, setting a conveying flow valve (7) and a reverse pressurizing valve (9) throughout a pneumatic conveying system in a closed state, and an electronically controlled reversing valve (8) in position I, that is, connecting the conveying flow valve (7) and whirl holes (9-3) of the reverse pressurizing pipe (9);
5. An unblocking method of a pneumatic conveying pipeline, comprising the following steps:
6) in the normal conveying process, when the flow field pressures obtained by the pressure measuring systems at position N and position N+l of the material conveying pipeline (11) are lower than the normal conveying value, and no sudden high flow field pressure occurs throughout the conveying system, opening, by the data analysis controller (4), the conveying flow valve (7) at an upstream N-l nearest to the N, so that a high-pressure airflow in the high-pressure air conveying pipe (1) enters the whirl holes (9-3) of the reverse pressurizing pipe (9) at the upstream N-l to produce a whirl pressurized conveying effect;
7) in the normal conveying process, if the flow field pressure obtained by the pressure measuring device (6) at the position N of the material conveying pipeline (11) is suddenly increased, and the flow field pressures at a downstream N+l position and subsequent positions are lower than the normal conveying value, indicating that a pipeline blockage accident will occur in the position N to the downstream N+l position, and closing, by the data analysis controller (4), the conveying flow valves (7) at positions N+l and N+2, and opening reverse flow valves (10) at positions N and N+l, so that a high-pressure airflow in the high-pressure air conveying pipe (1) enters pressurizing holes (9-4) and reverse whirl holes (9-5) of the reverse pressurizing pipes (9) at positions N and N+l, wherein the reverse whirl holes (9-5) generate a reverse swirling flow to impact a blocked material pile, and the pressurizing holes (9-4) provide sufficient backpressure and high-pressure air for the reverse swirling flow and prevent materials in a downstream conveying pipe from being sucked into the reverse swirling flow;
8) switching the electronically controlled reversing valve (8) upstream of the position N to position II while opening the reverse swirling flow, that is, connecting a vacuum pumping pipe (3) and the whirl holes (9-3) of the reverse pressurizing pipe (9), thereby generating vacuum negative pressure to increase the pressure difference across the blocked material pile and improve the reverse thrust, and discharging excess reverse airflow to prevent problems in subsequent conveying, the process being called reverse impact process; and
9) after one reverse impact is done over a short period of time in a range of 10 ms and 1,000 ms, restoring the material conveying pipeline (11) to the conveying state, and if the case that the flow field pressure is suddenly increased in step 7) continues to occur, further executing steps 7) and step 8) until normal conveying is restored.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810336872.3 | 2018-04-16 | ||
| CN201810336872.3A CN108584443B (en) | 2018-04-16 | 2018-04-16 | Pneumatic conveying pipeline blockage dredging system and method |
| PCT/CN2018/093016 WO2019200710A1 (en) | 2018-04-16 | 2018-06-27 | System and method for clearing blocked pneumatic transport pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2018417114A1 true AU2018417114A1 (en) | 2019-10-31 |
| AU2018417114B2 AU2018417114B2 (en) | 2021-03-11 |
Family
ID=63622523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2018417114A Ceased AU2018417114B2 (en) | 2018-04-16 | 2018-06-27 | Unblocking system and method of pneumatic conveying pipeline |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN108584443B (en) |
| AU (1) | AU2018417114B2 (en) |
| WO (1) | WO2019200710A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201906310D0 (en) * | 2019-05-03 | 2019-06-19 | Schenck Process Uk Ltd | Material conveying apparatus with shut down valves |
| BR112022024009A2 (en) * | 2020-05-25 | 2022-12-20 | Nte Holding S R L | FLUID CONTROL SYSTEM IN PNEUMATIC TRANSPORT PIPELINES FOR POWDER OR GRANULATED MATERIAL |
| CN112173716A (en) * | 2020-10-19 | 2021-01-05 | 北京易识科技有限公司 | Pneumatic conveying pipeline sample conveying system |
| CN113048407A (en) * | 2021-03-18 | 2021-06-29 | 中国商用飞机有限责任公司 | System for detecting and dredging blockage point of aircraft waste water pipeline and control method thereof |
| CN113494653A (en) * | 2021-06-23 | 2021-10-12 | 桐昆集团浙江恒通化纤有限公司 | Device and method for relieving blockage of vacuum system of polyester production device |
| CN115815246A (en) * | 2022-12-05 | 2023-03-21 | 核工业理化工程研究院 | Reverse purging method and device for blocking of negative pressure vacuum pipeline |
| CN115773776B (en) * | 2022-12-05 | 2024-08-16 | 核工业理化工程研究院 | Blocking test method for negative pressure vacuum pipeline |
| CN118683994B (en) * | 2024-08-29 | 2024-10-29 | 山东金骐智能装备有限公司 | Pneumatic conveying flow control device based on pressure feedback |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593734A (en) * | 1978-12-29 | 1980-07-16 | Gen Resource Corp | Method and device for carrying corpuscular substance through pipeeline |
| DE3037517C2 (en) * | 1980-10-03 | 1983-12-08 | Waeschle Maschinenfabrik Gmbh, 7980 Ravensburg | System for the pneumatic conveying of bulk goods |
| JPS6118635A (en) * | 1984-06-21 | 1986-01-27 | Matsui Seisakusho:Kk | Pneumatic conveyance of powder material free from clogging and apparatus thereof |
| DE3714923A1 (en) * | 1987-05-05 | 1988-12-01 | Waeschle Maschf Gmbh | DEVICE FOR PNEUMATICALLY CONVEYING SCHUETTGUT |
| JPH10114430A (en) * | 1996-10-09 | 1998-05-06 | Satake Eng Co Ltd | Clogging prevention device for powder and granular material transport |
| JPH10338349A (en) * | 1997-06-11 | 1998-12-22 | Sumitomo Metal Ind Ltd | Powder blowing tank switching control method |
| JPH1143225A (en) * | 1997-07-24 | 1999-02-16 | Matsui Mfg Co | Pneumatic transportation method for powder and granular and pneumatic transportation device for powder and granular material |
| DE102004047457B8 (en) * | 2004-09-30 | 2009-11-26 | Coperion Gmbh | Method for operating a conveyor system for flowable bulk materials, conveyor system for carrying out the method and multiple-function valve for this purpose |
| CN201362508Y (en) * | 2009-01-14 | 2009-12-16 | 西安信耐机电设备有限公司 | Stone coal subpressure pneumatic conveying system |
| CN201982871U (en) * | 2010-11-19 | 2011-09-21 | 曹臻 | Efficient cement delivery pipeline |
| CN105621103A (en) * | 2014-12-01 | 2016-06-01 | 常州常衡德宇粉体集成系统有限公司 | Positive-pressure conveying system device |
| CN204280722U (en) * | 2014-12-03 | 2015-04-22 | 新疆佰澜德技术开发有限公司 | Pebble coal positive pressure pneumatic conveying boosting compensation device |
| CN204624703U (en) * | 2015-05-12 | 2015-09-09 | 厦门龙净环保物料输送科技有限公司 | For the blockage-clearing device of long distance Pneumatic conveying pipeline |
| CN205526693U (en) * | 2016-02-26 | 2016-08-31 | 江苏耐尔冶电集团有限公司 | Wear -resisting pipeline of mine long range transport |
| CN107226353B (en) * | 2016-03-25 | 2019-08-27 | 宝山钢铁股份有限公司 | It is a kind of from dredging material-transporting system and its from dredging method |
| CN206511662U (en) * | 2017-02-24 | 2017-09-22 | 三峡大学 | Thick and thin phase burner plugging handling system |
| CN107082283B (en) * | 2017-05-10 | 2019-10-11 | 中国矿业大学 | A kind of self-excited oscillation type pulse eddy flow booster |
| CN208150512U (en) * | 2018-04-16 | 2018-11-27 | 江苏师范大学 | A kind of Pneumatic conveying pipeline blocking dredging system |
-
2018
- 2018-04-16 CN CN201810336872.3A patent/CN108584443B/en active Active
- 2018-06-27 AU AU2018417114A patent/AU2018417114B2/en not_active Ceased
- 2018-06-27 WO PCT/CN2018/093016 patent/WO2019200710A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019200710A1 (en) | 2019-10-24 |
| AU2018417114B2 (en) | 2021-03-11 |
| CN108584443A (en) | 2018-09-28 |
| CN108584443B (en) | 2024-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2018417114B2 (en) | Unblocking system and method of pneumatic conveying pipeline | |
| CN104359661A (en) | Universal valve performance test device | |
| GB2285285A (en) | Fuel staging system | |
| CN107084167B (en) | A kind of hydraulic control system and method for determining specific discharge output | |
| CN203630649U (en) | Gas flow or pressure adjustment device | |
| CN107270127B (en) | A kind of dry gas seals pressure charging system | |
| GB1300197A (en) | Pipeline pump station by-pass | |
| CN111963466B (en) | Centrifugal fan for air conditioning system | |
| CN112128620B (en) | Method for using device for controlling closing time of valve | |
| KR101581232B1 (en) | Anti surge system for compressor | |
| CN209674248U (en) | Voltage-regulating system | |
| AU2018418036B2 (en) | System and method for pneumatic conveying with accurate pressurization | |
| USRE30329E (en) | Method and apparatus for antisurge protection of a dynamic compressor | |
| CN208150512U (en) | A kind of Pneumatic conveying pipeline blocking dredging system | |
| CN106872158A (en) | A kind of experimental provision for studying Venturi transmission ejector injection characteristic | |
| US4364410A (en) | Bi-directional flow control system | |
| CN209674249U (en) | Pressure control device and voltage-regulating system | |
| CN218168089U (en) | Mechanical speed controller for pipe cleaner | |
| CN208902204U (en) | A kind of differential pressure type gas flowmeter automatic blowout device | |
| CN112253992A (en) | System for inflating and exhausting vacuum container | |
| CN219897619U (en) | Pump control SNCR denitration gas-liquid distribution device | |
| CN220323061U (en) | Special detection table for regeneration performance of filter element | |
| CN221348832U (en) | Device for adjusting compressed air flow | |
| JPH04328435A (en) | Connecting pipe for differential pressure transmitter | |
| CN208779139U (en) | A kind of high-pressure reversing valve group |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |