AU2018417115B2 - High-efficiency dust removal system and method of pneumatic conveying pipe - Google Patents
High-efficiency dust removal system and method of pneumatic conveying pipe Download PDFInfo
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- AU2018417115B2 AU2018417115B2 AU2018417115A AU2018417115A AU2018417115B2 AU 2018417115 B2 AU2018417115 B2 AU 2018417115B2 AU 2018417115 A AU2018417115 A AU 2018417115A AU 2018417115 A AU2018417115 A AU 2018417115A AU 2018417115 B2 AU2018417115 B2 AU 2018417115B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
Abstract
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(54) Title: SYSTEM AND METHOD FOR HIGHLY EFFICIENT REMOVAL OF DUST FROM PNEUMATIC TRANSPORT PIPE
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(57) Abstract: A system for highly efficient removal of dust from a pneumatic transport pipe comprises a pneumatic material transport
pipe (10). The pneumatic material transport pipe (10) is provided with a dust measurement device (7) and a misting device (8) connected
to a control device and sequentially arranged in a material flow direction. The control device controls, according to a change in a dust
amount in the pneumatic material transport pipe (10), the misting device (8) to generate mist in an amount corresponding to the dust
amount. The system for highly efficient removal of dust from a pneumatic transport pipe can perform a dust removal operation with
C respect to a portion of or the entire pipe, prevent material deterioration or blocking of the pipe resulting from an excessive amount of
mist, and prevent problems such as locally accumulated heat and dust explosion due to insufficient mist.
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Description
Field of the Invention
The present invention relates to an air pneumatic conveying system suitable for dilute-phase and dense-phase coal and grain particles, and in particular, to a high-efficiency
dust removal system and method of a pneumatic conveying pipe.
Description of Related Art A pneumatic conveying system is a conveying system that conveys bulk 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 bulk materials is generally present, and belongs to the category of gas-solid two-phase flow.
In the pneumatic conveying process, the dust capacity in the conveying pipeline is gradually increased due to the friction between the materials and the pipeline and the friction between the materials. In the transportation of coal and grain particles, explosion accident is easily caused when the dust capacity in the pipe increases to the explosion point.
Therefore, it is generally necessary to spray water and humidify the materials prior to material conveying, so as to reduce suspended dust in the pipeline. However, since the materials are sprayed with water and humidified before conveying, the materials may be deteriorated and moldy, and more water inside the pipe may cause blockage of an elbow and a pressurized measuring device, which restricts the application and development of the pneumatic conveying technology in coal and grain transportation.
SUMMARY OF THE INVENTION According to a first aspect, there is provided a high-efficiency dust removal system of a pneumatic conveying pipe, comprising a pneumatic material conveying pipeline, wherein a dust measuring device and a spraying device connected to a control device and sequentially arranged in the material flowing direction are also mounted on the pneumatic material conveying pipeline; and the spraying device is regulated by the control device according to the change in dust capacity in the pneumatic material conveying pipeline to achieve a spraying effect which is suitable for the dust capacity, wherein the dust measuring device mainly consists of a dust sensor, a filter screen, and a measuring pipe; both ends of the measuring pipe are connected to the pneumatic material conveying pipeline by means of the connecting flange; the dust sensor is mounted at an upper end of the middle part of the measuring pipe, and left and right groups of measuring holes are also formed at the upper end of the middle part of the measuring pipe; a conveying airflow enters a measuring area at a front end of the dust sensor from the measuring holes at one end, and flows out from the measuring holes at the other end; the filter screen is mounted at each group of measuring holes; and a data output end of the dust sensor is connected to the data acquisition device via a data transmission line.
Compared with the prior art, the present invention provides a high-efficiency dust removal system of a pneumatic conveying pipe. A dust measuring device and a spraying device connected to a control device and sequentially arranged in the material flowing direction are arranged in a pneumatic conveying pipeline system, so as to transmit the change in dust in the pneumatic conveying pipeline system to the control device and compare the change in dust with a preset normal dust capacity; the control device controls a corresponding electronically controlled flow valve and electronically controlled reversing valve to open the spraying device when the dust capacity in the pipeline is higher than a set dust threshold value; in the spraying process, the dust measuring device and the control device can track the change in dust and the flow data in the pipeline in time, and the spraying device is regulated to produce a reasonable spraying effect to obtain a precise dust suppression way, the spraying volume and the spraying time in the pneumatic conveying pipeline, thereby meeting the demand of partial or overall dust removal of the pipeline, and preventing the problems of material deterioration or pipeline blockage due to excessive spraying, and local heat accumulation and dust explosion due to insufficient spraying. The present invention has strong novelty and wide applicability.
According to a second aspect, there is provided a high-efficiency dust removal method of a pneumatic conveying pipe, comprising the following steps:
1) sequentially arranging multiple groups of dust measuring devices and spraying devices in a pneumatic material conveying pipeline in the material flowing direction, the dust measuring devices and the spraying devices being disposed in pairs;
2) obtaining, by the dust measuring device, the change in dust capacity in the pneumatic material conveying pipeline, transmitting the change to a data acquisition device via a data line, and transmitting, by the data acquisition device, the acquired dust capacity data to a data analysis controller;
3) analyzing, by the data analysis controller, the obtained change in flow field dust capacity, and comparing the change in flow field dust capacity with a preset normal dust capacity;
4) controlling, by the data analysis controller, an electronically controlled flow valve to open when the dust capacity in the pneumatic material conveying pipeline is higher than a set dust threshold value, and turning on a path of an electronically controlled reversing valve to open small spraying holes of the spraying device and close large spraying holes, thereby achieving a weak spraying effect;
5) passing a high-pressure water flow into the pneumatic material conveying pipeline through a high-pressure water flow conveying pipe, the electronically controlled flow valve, a flow meter, the electronically controlled reversing valve, and the spraying device;
6) in the spraying process, the dust capacity and the flow data of the high-pressure water flow collected from the dust measuring device and the flow meter, timely feeding back to the data analysis controller by means of the data acquisition device;
7) adjusting and controlling, by the data analysis controller, the opening degree of the electronically controlled flow valve and the position and the tum-on time of the electronically controlled reversing valve through analysis of the feedback data, so as to open the large spraying holes of the spraying device and close the small spraying holes, thereby achieving a medium spraying effect; and
8) in the medium spraying process, adjusting and controlling, by the data analysis controller, the opening degree of the electronically controlled flow valve and the position and the tum-on time of the electronically controlled reversing valve when the dust capacity in the pipeline obtained by the dust measuring device is still higher than the preset normal dust capacity, so as to open the small spraying holes and the large spraying holes of the spraying device, thereby achieving a strong spraying effect.
Advantageous Effect
Compared with the prior art, the present invention provides a high-efficiency dust removal method of a pneumatic conveying pipe. Multiple groups of dust measuring devices and spraying devices are sequentially arranged in a pneumatic conveying pipeline system in the material flowing direction, so as to transmit the change in dust in the pneumatic conveying pipeline system to a data acquisition device and a data analysis controller and compare the change in dust with a preset normal dust capacity; the data analysis controller controls a corresponding electronically controlled flow valve and electronically controlled reversing valve to open the spraying device when the dust capacity in the pipeline is higher than a set dust threshold value; in the spraying process, the change in dust and the flow data in the pipeline are fed back to the data analysis controller in time by the dust measuring device and the flow meter, and the opening degree of the corresponding electronically controlled flow valve and the position and the turn-on time of the electronically controlled reversing valve are adjusted and controlled through analysis of the feedback data, so as to produce a reasonable spraying effect to obtain a precise dust suppression way, the spraying volume and the spraying time in the pneumatic conveying pipeline, thereby meeting the demand of partial or overall dust removal of the pipeline, and preventing the problems of material deterioration or pipeline blockage due to excessive spraying, and local heat accumulation and dust explosion
due to insufficient spraying. The present invention has strong novelty and wide applicability.
The present invention is further described below with reference to the accompanying drawings and embodiments.
FIG. 1 is a schematic structural diagram of a dust removal system according to an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a spraying device in FIG. 1.
FIG. 3 is a partial enlarged view of A in FIG. 2.
FIG. 4 is a schematic structural diagram of a dust measuring device in FIG. 1.
In the drawings, 1 data acquisition device, 2 data analysis controller, 3 high-pressure water flow conveying pipe, 4 electronically controlled flow valve, 5 flow meter, 6 electronically controlled reversing valve, 7 dust measuring device, 8 spraying device 9 connecting flange, 10 pneumatic material conveying pipeline, 7-1 dust sensor, 7-2 filter screen, 7-3 measuring pipe, 8-1 small spraying hole, 8-2 large spraying hole, 8-3 spraying pipe, 8-4 high-pressure water flow pipe, 8-5 spherical valve, 8-6 valve spring.
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 of the present invention without involving any inventive effort are within the protection scope of the present invention.
FIGs. 1-4 illustrate schematic structural diagrams of a preferred embodiment of the present invention. A high-efficiency dust removal system of a pneumatic conveying pipe in FIG. 1 comprises a pneumatic material conveying pipeline 10, wherein a dust measuring device 7 and a spraying device 8 connected to a control device and sequentially arranged in the material flowing direction are also mounted on the pneumatic material conveying pipeline 10; and the spraying device 8 is regulated by the control device according to the change in dust capacity in the pneumatic material conveying pipeline 10 to achieve a spraying effect which is suitable for the dust capacity. The control device comprises a data acquisition device 1, a data analysis controller 2, an electronically controlled flow valve 4, a flow meter 5, and an electronically controlled reversing valve 6. The data acquisition device 1 is connected to the dust measuring device 7 and the flow meter 5, respectively. The spraying device 8 is connected to the electronically controlled reversing valve 6, the flow meter 5, and the electronically controlled flow valve 4 in sequence. The electronically controlled reversing valve 6 and the electronically controlled flow valve 4 are connected to the data analysis controller 2, respectively. More specifically, an inlet of the electronically controlled reversing valve 6 is connected to an outlet of the flow meter 5, a data output end of the flow meter 5 is connected to the data acquisition device 1 via a data transmission line, an inlet of the flow meter 5 is connected to an outlet of the electronically controlled flow valve 4, and a control end of the electronically controlled flow valve 4 is connected to the data analysis controller 2.
Preferably, multiple groups of dust measuring devices 7 and multiple groups of spraying devices 8 are arranged on the pneumatic material conveying pipeline 10, so that the measurement is more accurate, and the spraying effect is more uniform. In general, the spraying devices 8 and the dust measuring devices 7 are mounted in pairs. The dust measuring devices 7 and the spraying devices 8 are connected to the pneumatic material conveying pipeline 10 by means of a connecting flange 9.
Referring to FIG. 4, in this embodiment, the dust measuring device 7 mainly consists of a dust sensor 7-1, a filter screen 7-2, and a measuring pipe 7-3. Both ends of the measuring pipe 7-3 are connected to the pneumatic material conveying pipeline 10 by means of the connecting flange 9. The dust sensor 7-1 is mounted at an upper end of the middle part of the measuring pipe 7-3, and left and right groups of measuring holes are also formed at the upper end of the middle part of the measuring pipe 7-3. A conveying airflow enters a measuring area at a front end of the dust sensor 7-1 from the measuring holes at one end, and flows out from the measuring holes at the other end. The filter screen 7-2 is mounted at each group of measuring holes. The filter screen 7-2 can prevent the conveyed large particles from entering the measuring area to affect the measurement result. A data output end of the dust sensor 7-1 is connected to the data acquisition device 1 via a data transmission line.
Referring to FIGs. 2 and 3, in this embodiment, the spraying device 8 comprises a spraying pipe 8-3 and a high-pressure water flow conveying pipe 3. Two groups of axially arranged spraying holes are formed at the top of the spraying pipe 8-3. One group of spraying holes is small spraying holes 8-1, and the other group of spraying holes is large spraying holes 8-2. Each group of spraying holes consists of three spraying holes with a radial angle of 30°-90°. Each spraying hole consists of a high-pressure water flow pipe 8-4, a spherical valve 8-5, and a valve spring 8-6. A high-pressure water flow pipe 8-4, a spherical valve 8-5, and a valve spring 8-6 are disposed in each spraying hole. The periphery of a tail end of the high-pressure water flow pipe 8-4 is threadedly and sealedly connected to an upper end of the spraying hole of the spraying pipe 8-3 through a thread. The tail end of the high-pressure water flow pipe 8-4 is in contact with an upper end of the spherical valve 8-5, and a lower end of the spherical valve 8-5 is connected to an outlet of the spraying hole through the valve spring 8-6. The outlet of the spraying hole is a stepped port with a decreasing diameter. A circular groove structure is disposed around a lower end of the stepped hole. Three circular groove structures of each group of spraying holes are communicated with each other. Such a design can avoid the conveyed materials from directly impacting an inner wall of the spraying hole, and prevent the dust from accumulating and blocking the spraying holes. Three high-pressure water flow pipes 8-4 of each group of spraying holes are connected in series to an outlet of the electronically controlled reversing valve 6. A control end of the electronically controlled reversing valve 6 is connected to the data analysis controller 2. The high-pressure water flow conveying pipe 3 is connected to an inlet of the electrically controlled flow valve 4. Different spraying modes are obtained through different valve positions of the electronically controlled directional valve 6, thereby achieving strong, medium and weak spraying effects.
Preferably, the spraying pipe 8-3 is formed by pressing and sintering using the powder metallurgy technology and has strong wear resistance.
A high-efficiency dust removal method of a pneumatic conveying pipe, specifically comprising the following steps:
1) multiple groups of dust measuring devices 7 and spraying devices 8 are sequentially arranged in a pneumatic material conveying pipeline 10 in the material flowing direction, and the dust measuring devices 7 and the spraying devices 8 are disposed in pairs;
2) the change in dust capacity in the pneumatic material conveying pipeline 10 is obtained by the dust measuring device 7, and is transmitted to a data acquisition device 1 via a data line, and the acquired dust capacity data is transmitted to a data analysis controller 2 by the data acquisition device 1;
3) the obtained change in flow field dust capacity is analyzed by the data analysis controller 2, and is compared with a preset normal dust capacity;
4) an electronically controlled flow valve 2 is controlled to open by the data analysis controller 2 when the dust capacity in the pneumatic material conveying pipeline 10 is higher than a set dust threshold value, and a path of an electronically controlled reversing valve 6 is turned on to open small spraying holes 8-1 of the spraying device 8 and close large spraying holes 8-2, thereby achieving a weak spraying effect;
5) a high-pressure water flow is passed into the pneumatic material conveying pipeline 10 through a high-pressure water flow conveying pipe 3, the electronically controlled flow valve 4, a flow meter 5, the electronically controlled reversing valve 6, and the spraying device 8;
6) in the spraying process, the dust capacity and the flow data of the high-pressure water flow collected from the dust measuring device 7 and the flow meter 5 are fed back to the data analysis controller 2 in time by means of the data acquisition device 1;
7) the opening degree of the electronically controlled flow valve 4 and the position and the turn-on time of the electronically controlled reversing valve 6 are adjusted and controlled by the data analysis controller 2 through analysis of the feedback data, so as to open the large spray holes 8-2 of the spraying device 8 and close the small spray holes 8-2, thereby achieving a medium spraying effect; and
8) in the medium spraying process, the opening degree of the electronically controlled flow valve 4 and the position and the tum-on time of the electronically controlled reversing valve 6 are adjusted and controlled by the data analysis controller 2 when the dust capacity in the pipeline obtained by the dust measuring device 7 is still higher than the preset normal dust capacity, so as to open the small spraying holes 8-1 and the large spraying holes 8-2 of the spraying device 8, thereby achieving a strong spraying effect.
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.
Throughout the specification and the claims that follow, unless the context requires otherwise, the words "comprise" and "include" and variations such as "comprising" and "including" will be understood to imply the inclusion of a stated integer or group of integers, but not the exclusion of any other integer or group of integers.
The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement of any form of suggestion that such prior art forms part of the common general knowledge.
Claims (8)
1. A high-efficiency dust removal system of a pneumatic conveying pipe, comprising
a pneumatic material conveying pipeline, wherein a dust measuring device and a
spraying device connected to a control device and sequentially arranged in the
material flowing direction are also mounted on the pneumatic material conveying
pipeline; and the spraying device is regulated by the control device according to the
change in dust capacity in the pneumatic material conveying pipeline to achieve a
spraying effect which is suitable for the dust capacity; wherein the dust measuring
device mainly consists of a dust sensor, a filter screen, and a measuring pipe; both
ends of the measuring pipe are connected to the pneumatic material conveying
pipeline by means of the connecting flange; the dust sensor is mounted at an upper
end of the middle part of the measuring pipe, and left and right groups of measuring
holes are also formed at the upper end of the middle part of the measuring pipe; a
conveying airflow enters a measuring area at a front end of the dust sensor from the
measuring holes at one end, and flows out from the measuring holes at the other end;
the filter screen is mounted at each group of measuring holes; and a data output end of
the dust sensor is connected to the data acquisition device via a data transmission line.
2. The high-efficiency dust removal system of a pneumatic conveying pipe according
to claim 1, wherein multiple groups of dust measuring devices and multiple groups of
spraying devices are arranged on the pneumatic material conveying pipeline; the
spraying devices and the dust measuring devices are mounted in pairs; and the dust
measuring devices and the spraying devices are connected to the pneumatic material
conveying pipeline by means of a connecting flange.
3. The high-efficiency dust removal system of a pneumatic conveying pipe according
to claim 2, wherein the control device comprises a data acquisition device, a data
analysis controller, an electronically controlled flow valve, a flow meter, and an
electronically controlled reversing valve; the data acquisition device is connected to the dust measuring device and the flow meter, respectively; the spraying device is connected to the electronically controlled reversing valve, the flow meter, and the electronically controlled flow valve in sequence; and the electronically controlled reversing valve and the electronically controlled flow valve are connected to the data analysis controller, respectively.
4. The high-efficiency dust removal system of a pneumatic conveying pipe according
to claim 3, wherein an inlet of the electronically controlled reversing valve is
connected to an outlet of the flow meter, a data output end of the flow meter is
connected to the data acquisition device via a data transmission line, an inlet of the
flow meter is connected to an outlet of the electronically controlled flow valve, and a
control end of the electronically controlled flow valve is connected to the data
analysis controller.
5. The high-efficiency dust removal system of a pneumatic conveying pipe according
to claim 3, wherein the spraying device comprises a spraying pipe and a high-pressure
water flow conveying pipe; two groups of axially arranged spraying holes are formed
at the top of the spraying pipe; one group of spraying holes is small spraying holes,
and the other group of spraying holes is large spraying holes; each group of spraying
holes consists of three spraying holes with a radial angle of 30°-90°; a high-pressure
water flow pipe, a spherical valve, and a valve spring are disposed in each spraying
hole; the periphery of a tail end of the high-pressure water flow pipe is threadedly and
sealedly connected to an upper end of the spraying hole of the spraying pipe through a
thread; the tail end of the high-pressure water flow pipe is in contact with an upper
end of the spherical valve, and a lower end of the spherical valve is connected to an
outlet of the spraying hole through the valve spring; the outlet of the spraying hole is a
stepped port with a decreasing diameter; a circular groove structure is disposed
around a lower end of the stepped hole; three circular groove structures of each group
of spraying holes are communicated with each other; three high-pressure water flow
pipes of each group of spraying holes are connected in series to an outlet of the
electronically controlled reversing valve; a control end of the electronically controlled reversing valve is connected to the data analysis controller; and the high-pressure water flow conveying pipe is connected to an inlet of the electrically controlled flow valve.
6. The high-efficiency dust removal system of a pneumatic conveying pipe according
to claim 5, wherein the spraying pipe is formed by pressing and sintering using the
powder metallurgy technology.
7. A high-efficiency dust removal method of a pneumatic conveying pipe, comprising
the following steps:
1) sequentially arranging multiple groups of dust measuring devices and spraying
devices in a pneumatic material conveying pipeline in the material flowing direction,
the dust measuring devices and the spraying devices being disposed in pairs;
2) obtaining, by the dust measuring device, the change in dust capacity in the
pneumatic material conveying pipeline, transmitting the change to a data acquisition
device via a data line, and transmitting, by the data acquisition device, the acquired
dust capacity data to a data analysis controller;
3) analyzing, by the data analysis controller, the obtained change in flow field dust
capacity, and comparing the change in flow field dust capacity with a preset normal
dust capacity;
4) controlling, by the data analysis controller, an electronically controlled flow valve
to open when the dust capacity in the pneumatic material conveying pipeline is higher
than a set dust threshold value, and turning on a path of an electronically controlled
reversing valve to open small spraying holes of the spraying device and close large
spraying holes, thereby achieving a weak spraying effect;
) passing the high-pressure water flow into the pneumatic material conveying
pipeline through a high-pressure water flow conveying pipe, the electronically
controlled flow valve, a flow meter, the electronically controlled reversing valve, and
the spraying device;
6) in the spraying process, the dust capacity and the flow data of the high-pressure
water flow collected from the dust measuring device and the flow meter, timely
feeding back to the data analysis controller by means of the data acquisition device ;
7) adjusting and controlling, by the data analysis controller, the opening degree of the
electronically controlled flow valve and the position and the tum-on time of the
electronically controlled reversing valve through analysis of the feedback data, so as
to open the large spraying holes of the spraying device and close the small spraying
holes, thereby achieving a medium spraying effect; and
8) in the medium spraying process, adjusting and controlling, by the data analysis
controller, the opening degree of the electronically controlled flow valve and the
position and the turn-on time of the electronically controlled reversing valve when the
dust capacity in the pipeline obtained by the dust measuring device is still higher than
the preset normal dust capacity, so as to open the small spraying holes and the large
spraying holes of the spraying device, thereby achieving a strong spraying effect.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810336873.8A CN108421343B (en) | 2018-04-16 | 2018-04-16 | Efficient dust removal system and method in pneumatic conveying pipe |
| CN201810336873.8 | 2018-04-16 | ||
| PCT/CN2018/093017 WO2019200711A1 (en) | 2018-04-16 | 2018-06-27 | System and method for highly efficient removal of dust from pneumatic transport pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2018417115A1 AU2018417115A1 (en) | 2019-10-31 |
| AU2018417115B2 true AU2018417115B2 (en) | 2020-09-17 |
Family
ID=63161118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2018417115A Ceased AU2018417115B2 (en) | 2018-04-16 | 2018-06-27 | High-efficiency dust removal system and method of pneumatic conveying pipe |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN108421343B (en) |
| AU (1) | AU2018417115B2 (en) |
| WO (1) | WO2019200711A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112090204B (en) * | 2020-08-11 | 2022-08-23 | 安徽龙钰徽派古建工艺制品有限公司 | Cutting equipment is used in brick and tile production with function is collected to dust |
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| DE3323486A1 (en) * | 1983-06-30 | 1985-01-03 | Hugo Ibing GmbH, 4350 Recklinghausen | Device for suppressing dust at the outlet of pneumatic delivery lines for construction materials, in particular for dam construction materials in underground working |
| CN103241550A (en) * | 2013-05-09 | 2013-08-14 | 交城义望铁合金有限责任公司 | Pneumatic ash conveying system |
| CN208356378U (en) * | 2018-04-16 | 2019-01-11 | 江苏师范大学 | High-efficiency dust removal system in a kind of pneumatic carrier |
-
2018
- 2018-04-16 CN CN201810336873.8A patent/CN108421343B/en not_active Expired - Fee Related
- 2018-06-27 AU AU2018417115A patent/AU2018417115B2/en not_active Ceased
- 2018-06-27 WO PCT/CN2018/093017 patent/WO2019200711A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2819930A (en) * | 1953-10-14 | 1958-01-14 | Republic Steel Corp | Apparatus for removing dust |
| GB1013774A (en) * | 1964-02-26 | 1965-12-22 | Bergwerksverband Gmbh | Improvements in and relating to pneumatic conveyors |
| JPS5859124A (en) * | 1981-10-02 | 1983-04-08 | Sanko Kuki Sochi Kk | Pneumatic transport method of coal |
| CN203319266U (en) * | 2013-06-26 | 2013-12-04 | 山东电力工程咨询院有限公司 | Dense pneumatic ash conveying system of thermal power plant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108421343A (en) | 2018-08-21 |
| WO2019200711A1 (en) | 2019-10-24 |
| CN108421343B (en) | 2020-09-04 |
| AU2018417115A1 (en) | 2019-10-31 |
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| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |