CN110568272A - Powder pneumatic conveying electrostatic monitor - Google Patents
Powder pneumatic conveying electrostatic monitor Download PDFInfo
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- CN110568272A CN110568272A CN201810571448.7A CN201810571448A CN110568272A CN 110568272 A CN110568272 A CN 110568272A CN 201810571448 A CN201810571448 A CN 201810571448A CN 110568272 A CN110568272 A CN 110568272A
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- electric field
- powder
- processing device
- charge chamber
- signal acquisition
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention provides a powder pneumatic conveying static monitor, which comprises a power supply, wherein the power supply is connected with a signal acquisition and processing device, and the signal acquisition and processing device comprises a signal receiving circuit, a signal amplifying circuit and a signal converting circuit which are sequentially connected. The input end of the signal acquisition and processing device is respectively connected with an electric field intensity sensor and a charge chamber, the output end of the signal acquisition and processing device is connected with a terminal instrument, and the electric field intensity sensor, the charge chamber and the terminal instrument are all connected with the signal acquisition and processing device through shielded cables. The structure of the charge chamber is a double-layer metal cylinder structure which is insulated from each other, a movable door is arranged at the bottom of the charge chamber, and the opening or closing of the movable door is controlled by a terminal instrument through a signal acquisition and processing device. The invention can realize the automatic detection of the charge-to-mass ratio of the powder in the pipeline, ensure the real-time monitoring of static electricity in the powder conveying process and ensure the safety of the conveying process.
Description
Technical Field
The invention relates to the field of powder static monitoring of petrochemical enterprises, in particular to a pipeline powder air-conveying static monitor.
background
In the petrochemical industry, electrostatic discharge of powder can cause accidents such as fire, explosion and the like. Therefore, effective real-time online monitoring of the charge amount in the powder processing operation process is a leading issue of great attention in the field of electrostatic research. The electrostatic parameters of the powder mainly comprise electrostatic voltage, electrostatic electric field, charge-mass ratio and the like. The charge-to-mass ratio (q/m) is an important parameter for characterizing the degree of charge of the powder, and when the charge-to-mass ratio exceeds a limit value, the surface electric field intensity of each powder particle is enough to ionize the surrounding atmosphere, which will cause electrostatic discharge of the powder. Therefore, the measurement of the charge-to-mass ratio is of great significance for preventing electrostatic discharge accidents.
Disclosure of Invention
Based on the technical problem, the invention provides a powder air-assisted static electricity monitor which can perform real-time online monitoring on powder static electricity in pipelines of petrochemical enterprises.
The technical solution adopted by the invention is as follows:
A powder pneumatic conveying static monitor comprises an electric field intensity sensor for detecting a static electric field in a pipeline, a charge chamber for detecting the charge-to-mass ratio of powder in the pipeline, a signal acquisition and processing device and a terminal instrument;
The electric field intensity sensor and the charge chamber are both arranged on the pipeline, the electric field intensity sensor and the charge chamber are both connected with the input end of the signal acquisition and processing device, and the output end of the signal acquisition and processing device is connected with the terminal instrument.
Preferably, the signal acquisition and processing device comprises a signal receiving circuit, a signal amplifying circuit and a signal conversion circuit which are connected in sequence.
Preferably, the electric field intensity sensor, the charge chamber and the terminal instrument are all connected with the signal acquisition and processing device through shielded cables.
Preferably, the signal acquisition and processing device is connected with a power supply.
Preferably, the electric field intensity sensor comprises a detection probe, and the detection probe is insulated from the pipeline.
preferably, the charge chamber includes the barrel, and the barrel includes inside and outside two-layer metal section of thick bamboo, and mutual insulation between two-layer metal section of thick bamboo is provided with the dodge gate that is used for adjusting the inside powder material volume of charge chamber in the bottom of charge chamber.
Preferably, the charge chamber is fixed in the center of the pipe by a metal rod.
Preferably, the opening, closing and opening amplitude of the movable door are controlled by a terminal instrument through a signal acquisition and processing device.
Preferably, an insulating material is filled between the two layers of metal cylinders.
Preferably, the specific monitoring process is as follows: the electric field intensity sensor detects the electric field intensity in the pipeline and compares the electric field intensity with a set value in the terminal instrument, when the detected electric field intensity does not exceed the set value, a movable door at the bottom of the charge chamber is in an open state, and powder can freely pass through the charge chamber; when the detected electric field strength exceeds a set value, the terminal instrument controls the movable door at the bottom of the charge chamber to be closed through the signal acquisition and processing device, the movable door is in a Faraday cylinder shape after being closed, and the charge-to-mass ratio of the powder falling into the charge chamber is tested.
The beneficial technical effects of the invention are as follows:
In the powder pneumatic conveying static monitor provided by the invention, the electric field intensity sensor can detect the electric field intensity in the pipeline, and when the electric field intensity is detected not to exceed a set value, the movable door at the bottom of the charge chamber is in an open state, so that powder can freely pass through the movable door; and when the detected electric field intensity exceeds a set value, the movable door at the bottom of the charge chamber is closed according to the set time, and the charge-to-mass ratio of the powder falling into the charge chamber is tested after the movable door is closed. The invention can realize the automatic detection of the charge-to-mass ratio of the powder in the pipeline, ensure the real-time monitoring of static electricity in the powder conveying process and ensure the safety of the conveying process.
Drawings
the invention will be further described with reference to the following detailed description and drawings:
FIG. 1 is a schematic structural view of the powder pneumatic conveying electrostatic monitor of the present invention.
Detailed Description
As shown in fig. 1, the powder pneumatic conveying static monitor comprises a power supply 1, wherein the power supply 1 is connected with a signal acquisition and processing device 2, and the signal acquisition and processing device 2 comprises a signal receiving circuit, a signal amplifying circuit and a signal conversion circuit which are sequentially connected.
The input end of the signal acquisition and processing device 2 is respectively connected with an electric field intensity sensor 3 and a charge chamber 4, and the output end of the signal acquisition and processing device 2 is connected with a terminal instrument 5.
The electric field intensity sensor 3, the charge chamber 4 and the terminal instrument 5 are all connected with the signal acquisition and processing device 2 through shielded cables.
The electric field intensity sensor 3 is installed on the pipeline 6 and used for detecting an electrostatic electric field in the pipeline 6, and a probe of the electric field intensity sensor 3 is insulated from the pipeline 6.
The charge chamber 4 is fixed in the center of the pipeline 6 through a metal rod and is insulated from the pipeline, the charge chamber 4 is made of double-layer metal cylinders, the two layers of metal cylinders are insulated from each other, a movable door is arranged at the bottom of the charge chamber, and the time required by opening or closing and closing of the movable door is controlled by a terminal instrument 5 through a signal acquisition and processing device 2.
When the electric field intensity sensor is used, the electric field intensity sensor 3 can detect the electric field intensity in the pipeline 6 and compare the electric field intensity with a set value in the terminal instrument 5, when the electric field intensity is detected not to exceed the set value, the movable door at the bottom of the charge chamber 4 is in an open state, and powder can freely pass through the charge chamber. When the detected electric field intensity exceeds a set value, the movable door at the bottom of the charge chamber is closed according to the set closing time, the movable door is in a Faraday cylinder shape after being closed, and the charge-to-mass ratio of the powder falling into the charge chamber is tested.
the invention can realize the automatic detection of the charge-to-mass ratio of the powder in the pipeline, ensure the real-time monitoring of static electricity in the powder conveying process and ensure the safety of the conveying process.
Parts not described in the above modes can be realized by adopting or referring to the prior art.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a powder wind send static monitor which characterized in that: the device comprises an electric field intensity sensor for detecting an electrostatic electric field in a pipeline, a charge chamber for detecting the charge-to-mass ratio of powder in the pipeline, a signal acquisition and processing device and a terminal instrument;
The electric field intensity sensor and the charge chamber are both arranged on the pipeline, the electric field intensity sensor and the charge chamber are both connected with the input end of the signal acquisition and processing device, and the output end of the signal acquisition and processing device is connected with the terminal instrument.
2. The powder pneumatic conveying electrostatic monitor of claim 1, wherein: the signal acquisition and processing device comprises a signal receiving circuit, a signal amplifying circuit and a signal conversion circuit which are connected in sequence.
3. The powder pneumatic conveying electrostatic monitor of claim 1, wherein: and the electric field intensity sensor, the charge chamber and the terminal instrument are connected with the signal acquisition and processing device through shielded cables.
4. The powder pneumatic conveying electrostatic monitor of claim 1, wherein: the signal acquisition and processing device is connected with a power supply.
5. The powder pneumatic conveying electrostatic monitor of claim 1, wherein: the electric field intensity sensor comprises a detection probe, and the detection probe is insulated from the pipeline.
6. The powder pneumatic conveying electrostatic monitor of claim 1, wherein: the charge chamber comprises a barrel body, the barrel body comprises an inner layer of metal barrel and an outer layer of metal barrel, the two layers of metal barrels are insulated from each other, and a movable door used for adjusting the amount of powder materials in the charge chamber is arranged at the bottom of the charge chamber.
7. the powder pneumatic conveying electrostatic monitor of claim 6, wherein: the charge chamber is fixed in the center of the pipeline through a metal rod.
8. The powder pneumatic conveying electrostatic monitor of claim 6, wherein: the opening, closing and opening amplitude of the movable door are controlled by the terminal instrument through the signal acquisition and processing device.
9. The powder pneumatic conveying electrostatic monitor of claim 6, wherein: and an insulating material is filled between the two layers of metal cylinders.
10. The powder pneumatic conveying electrostatic monitor of any one of claims 1 to 9, wherein the specific monitoring process is as follows: the electric field intensity sensor detects the electric field intensity in the pipeline and compares the electric field intensity with a set value in the terminal instrument, when the detected electric field intensity does not exceed the set value, a movable door at the bottom of the charge chamber is in an open state, and powder can freely pass through the charge chamber; when the detected electric field strength exceeds a set value, the terminal instrument controls the movable door at the bottom of the charge chamber to be closed through the signal acquisition and processing device, the movable door is in a Faraday cylinder shape after being closed, and the charge-to-mass ratio of the powder falling into the charge chamber is tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810571448.7A CN110568272A (en) | 2018-06-06 | 2018-06-06 | Powder pneumatic conveying electrostatic monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810571448.7A CN110568272A (en) | 2018-06-06 | 2018-06-06 | Powder pneumatic conveying electrostatic monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110568272A true CN110568272A (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810571448.7A Pending CN110568272A (en) | 2018-06-06 | 2018-06-06 | Powder pneumatic conveying electrostatic monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110568272A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2618171Y (en) * | 2003-05-10 | 2004-05-26 | 江苏东强股份有限公司 | Electrostatic power monitor |
| CN1548966A (en) * | 2003-05-10 | 2004-11-24 | 江苏东强股份有限公司 | Powder electrostatic monitor |
| CN205384325U (en) * | 2015-12-29 | 2016-07-13 | 中国石油化工股份有限公司 | Pipeline powder static monitoring ware |
-
2018
- 2018-06-06 CN CN201810571448.7A patent/CN110568272A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2618171Y (en) * | 2003-05-10 | 2004-05-26 | 江苏东强股份有限公司 | Electrostatic power monitor |
| CN1548966A (en) * | 2003-05-10 | 2004-11-24 | 江苏东强股份有限公司 | Powder electrostatic monitor |
| CN205384325U (en) * | 2015-12-29 | 2016-07-13 | 中国石油化工股份有限公司 | Pipeline powder static monitoring ware |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191213 |
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| RJ01 | Rejection of invention patent application after publication |