AU2018417114B2 - Unblocking system and method of pneumatic conveying pipeline - Google Patents

Unblocking system and method of pneumatic conveying pipeline Download PDF

Info

Publication number
AU2018417114B2
AU2018417114B2 AU2018417114A AU2018417114A AU2018417114B2 AU 2018417114 B2 AU2018417114 B2 AU 2018417114B2 AU 2018417114 A AU2018417114 A AU 2018417114A AU 2018417114 A AU2018417114 A AU 2018417114A AU 2018417114 B2 AU2018417114 B2 AU 2018417114B2
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.)
Ceased
Application number
AU2018417114A
Other versions
AU2018417114A1 (en
Inventor
Yan Hu
Panpan HUANG
Jianping Li
Yu Liu
Yanxiang WANG
Bangsheng XING
Daolong YANG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Normal University
Original Assignee
Jiangsu Normal University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jiangsu Normal University filed Critical Jiangsu Normal University
Publication of AU2018417114A1 publication Critical patent/AU2018417114A1/en
Application granted granted Critical
Publication of AU2018417114B2 publication Critical patent/AU2018417114B2/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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

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.
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 inletII 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+1 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-i 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-i 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+1 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+1 position, and closing, by the data analysis controller, the conveying flow valves at positions N+1 and N+2, and opening reverse flow valves at positions N and N+1, 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+1, 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, 9-5reverse 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+1 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-i 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-i 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+1 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+1 position, and the data analysis controller 4 closes the conveying flow valves 7 at positions N+1 and N+2, and opens reverse flow valves 10 at positions N and N+1, 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+1, 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 technical spirit of the present invention fall within the protection scope of the present invention.

Claims (1)

  1. What is claimed is:
    1. An unblocking system of a pneumatic conveying pipeline, comprising a material
    conveying pipeline (11), wherein multiple groups of pressure measuring systems and
    multiple groups of reverse pressurizing systems arranged at intervals are sequentially
    mounted on the material conveying pipeline (11) in a material conveying direction;
    each 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);
    each 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) are positioned downstream of the material conveying
    direction relative to the pressurizing holes (9-4) and 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) 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) are positioned upstream of the material conveying direction relative to the pressurizing holes (9-4) and 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); the pressure measuring systems and the reverse pressurizing systems 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; 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. The unblocking system of a pneumatic conveying pipeline according to claim 1
    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.
    3. The unblocking system of a pneumatic conveying pipeline according to claim 2,
    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.
    4. 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 (11) in a material conveying
    direction;
    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;
    3) transmitting, by the data acquisition device (2), the acquired pressure data to a data
    analysis controller (4);
    4) analyzing, by the data analysis controller (4), the flow field pressure change and
    comparing with a preset normal pneumatic conveying value;
    ) 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);
    6) in the normal conveying process, when the flow field pressures obtained by the
    pressure measuring systems at position N and position N+1 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-1 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-i 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+1 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+1
    position, and closing, by the data analysis controller (4), the conveying flow valves (7)
    at positions N+1 and N+2, and opening reverse flow valves (10) at positions N and
    N+1, 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+1, 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.
AU2018417114A 2018-04-16 2018-06-27 Unblocking system and method of pneumatic conveying pipeline Ceased AU2018417114B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201810336872.3A CN108584443A (en) 2018-04-16 2018-04-16 A kind of Pneumatic conveying pipeline blocks dredging system and method
CN201810336872.3 2018-04-16
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 AU2018417114A1 (en) 2019-10-31
AU2018417114B2 true 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) CN108584443A (en)
AU (1) AU2018417114B2 (en)
WO (1) WO2019200710A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085388A (en) * 1980-10-03 1982-04-28 Waeschle Maschf Gmbh Apparatus for pneumatically conveying bulk material
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

Family Cites Families (16)

* Cited by examiner, † Cited by third party
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
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
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085388A (en) * 1980-10-03 1982-04-28 Waeschle Maschf Gmbh Apparatus for pneumatically conveying bulk material
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

Also Published As

Publication number Publication date
CN108584443A (en) 2018-09-28
AU2018417114A1 (en) 2019-10-31
WO2019200710A1 (en) 2019-10-24

Similar Documents

Publication Publication Date Title
AU2018417114B2 (en) Unblocking system and method of pneumatic conveying pipeline
US5442922A (en) Fuel staging system
US4046490A (en) Method and apparatus for antisurge protection of a dynamic compressor
CN104359661A (en) Universal valve performance test device
CN111236361A (en) Bypass pipeline water hammer protection method
CN209745566U (en) Test device for thrust adjusting system of rocket engine
CN202687508U (en) Conveying system for granular solid material and blockage removing device thereof
CN203630649U (en) Gas flow or pressure adjustment device
CN209800371U (en) Device capable of effectively preventing fan surge
RU2194884C2 (en) Method of and device for preventing stalling-and-surging of turbocompressor at changing over from parallel connection into off-line mode of operation
CN111963466B (en) Centrifugal fan for air conditioning system
CN107270127B (en) A kind of dry gas seals pressure charging system
KR101581232B1 (en) Anti surge system for compressor
RU11588U1 (en) GAS PUMPING SYSTEM FROM A MAIN PIPELINE SECTION
USRE30329E (en) Method and apparatus for antisurge protection of a dynamic compressor
AU2018418036B2 (en) System and method for pneumatic conveying with accurate pressurization
CN208150512U (en) A kind of Pneumatic conveying pipeline blocking dredging system
US4364410A (en) Bi-directional flow control system
CN208902204U (en) A kind of differential pressure type gas flowmeter automatic blowout device
CN218168089U (en) Mechanical speed controller for pipe cleaner
RU2317451C1 (en) Jet pump starting system
CN112253992A (en) System for inflating and exhausting vacuum container
CN209674248U (en) Voltage-regulating system
CN220323061U (en) Special detection table for regeneration performance of filter element
US3811473A (en) Fluidic pressure regulator

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