CN109310001B - Safe and reliable active oil product static eliminator - Google Patents
Safe and reliable active oil product static eliminator Download PDFInfo
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- CN109310001B CN109310001B CN201711133432.XA CN201711133432A CN109310001B CN 109310001 B CN109310001 B CN 109310001B CN 201711133432 A CN201711133432 A CN 201711133432A CN 109310001 B CN109310001 B CN 109310001B
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- pipeline
- generating device
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
- H05F3/04—Carrying-off electrostatic charges by means of spark gaps or other discharge devices
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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
- G01R29/24—Arrangements for measuring quantities of charge
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- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The invention provides a safe and reliable active oil product static eliminator, which mainly solves the problem that oil product static in a thin pipeline cannot be eliminated. The connecting flange connects the static eliminator on the pipeline in series; the discharge voltage of the discharge needle is controllable; the insulating block is used for ensuring that the discharge needle and the pipeline cannot be punctured by high voltage; the oil charge density is used for detecting the electrostatic charge condition of oil in the pipeline and is connected with the control module through a data line; the positive voltage generating device is used for outputting voltage; the control device receives data of the oil charge density monitor and controls the output of the positive voltage generating device or the negative voltage generating device; when the data detected by the oil charge density monitor exceeds a threshold value, the control device starts the positive voltage generating device or the negative voltage generating device.
Description
Technical Field
The invention relates to oil delivery pipe static elimination equipment in flammable and explosive places such as petrochemical oil and gas storage and transportation, in particular to a safe and reliable active oil static eliminator.
Background
In the oil conveying process, a large amount of static electricity is generated in the oil conveying process due to the reasons that the conductivity of the oil is low, the oil conveying speed is too high, the oil contains impurities and the like. GB 12158 and 2006 general guidelines for preventing electrostatic accidents and GB 13348 and 2009 Electrostatic safety regulations for liquid Petroleum products specify that a liquid electrostatic eliminator can be installed at the end of a pipe to reduce electrostatic accumulation. However, at present, the oil pipeline static eliminator is mainly a passive static eliminator, which eliminates oil static by discharging static electricity of discharge needles in an induction mode and is installed on a pipeline with a larger diameter. At present, an active oil product static eliminator is not applied to a small-diameter thin pipe of an oil pipeline. And the existing active oil product static eliminator exists, when no oil product exists in the pipeline or the fluid section of the oil product in the pipeline is smaller than the diameter of the pipeline, a large amount of oil gas will remain in the pipeline under the two conditions, if the discharge needle is exposed in the oil gas at the moment, the discharge can directly generate electric spark in the pipeline, so that the danger of oil gas detonation can be caused.
In order to eliminate oil static in a thin pipeline and prevent explosion danger caused by direct discharge of a discharge needle in a pipeline where oil gas is stored, the invention provides a safe and reliable active oil static eliminator which needs to be developed.
Disclosure of Invention
The invention provides a safe and reliable active oil product static eliminator, which aims to eliminate oil product static in a pipeline with a smaller diameter and solve the problem that the explosion danger caused by the direct discharge of a discharge needle of the active oil product eliminator in the pipeline where oil gas is reserved.
A safe and reliable active oil product static eliminator comprises a pipeline, a connecting flange, a discharge needle, an insulating block, an oil product charge density monitor, a positive voltage generating device, a negative voltage generating device and a control device; the oil charge density monitor is arranged on the pipeline and is connected with the control device through a data line, the control device is respectively connected with the positive voltage generating device and the negative voltage generating device, and the positive voltage generating device and the negative voltage generating device are respectively connected with the discharge needles through leads; the discharge needle is arranged at the bottom of the pipeline, the discharge end of the discharge needle is wrapped in the insulating block, the insulating block is exposed out of the discharge end, and a gap is reserved between the discharge end of the discharge needle and the inner wall of the pipeline; a plurality of discharge needles are arranged at the bottom of the pipeline at equal intervals, and two adjacent discharge needles are respectively connected with the positive voltage generating device and the negative voltage generating device.
Preferably, the magnitude of the output voltage of the positive voltage generating device and the magnitude of the output voltage of the negative voltage generating device are less than 1500V.
It is further preferred that the positive voltage generating means is connected to a plurality of discharge needles to discharge simultaneously; the negative voltage generating device is connected with a plurality of discharge needles and discharges simultaneously.
It is also preferable that the pipe is used as a main body of the static eliminator, has a diameter equal to that of the oil pipeline, and is connected in series to the oil pipeline through a connecting flange.
It is also preferred that the length of the pipe is 3 to 7 times the diameter of the pipe.
More preferably, the material for making the insulating block is polytetrafluoroethylene.
It is further preferred that the pipe has a diameter of 50mm and the connecting flange has the same diameter as the pipe flange.
More preferably, the radius of curvature of the end of the discharge needle is 1000 μm.
It is also preferred that the controller receives measurement data from the oil charge density monitor when the detected value is greater than 5 μ C/m3The control device controls the positive voltage generating device or the negative voltage generating device to discharge.
The invention has the beneficial effects that: the tip of the used discharge needle has smaller curvature radius, is easy to ionize and is more beneficial to eliminating the static electricity of oil products; the insulating block is used for ensuring that the discharge needle and the pipeline are not punctured due to discharge, and ensuring that the discharge needle plays a role; the spray point sets up the bottom of pipeline and the discharge end of spray point leaves the clearance with the pipeline inner wall, is easily by oil submergence to avoided the direct burning that discharges and lead to of active oil canceller spray point in the pipeline that oil gas persists to explode the danger.
Drawings
FIG. 1 is a schematic view of an active oil electrostatic eliminator;
FIG. 2 is a schematic view of a structure of a discharge needle;
in the figure: 1-a pipeline; 2-a connecting flange; 3-a discharge needle; 4-an insulating block; 5-oil charge density monitor; 6-positive voltage generating means; 7-negative voltage generating means; 8-control device.
Detailed Description
Referring to fig. 1 to 2, a safe and reliable active oil electrostatic eliminator is described as follows:
a safe and reliable active oil product static eliminator comprises a pipeline 1, a connecting flange 2, a discharge needle 3, an insulating block 4, an oil product charge density monitor 5, a positive voltage generating device 6, a negative voltage generating device 7 and a control device 8. The oil charge density monitor 5 is arranged on the pipeline 1, the oil charge density monitor 5 is connected with the control device 8 through a data line, the control device is respectively connected with the positive voltage generating device 6 and the negative voltage generating device 7, and the positive voltage generating device 6 and the negative voltage generating device 7 are respectively connected with the discharge needles 3 through leads. The discharge needle 3 is arranged at the bottom of the pipeline 1, the discharge end of the discharge needle 3 is wrapped in the insulating block 4, the insulating block 4 is exposed out of the discharge end, and a gap is reserved between the discharge end of the discharge needle 3 and the inner wall of the pipeline; a plurality of discharge needles 3 are arranged at the bottom of the pipeline 1 at equal intervals, and two adjacent discharge needles 3 are respectively connected with a positive voltage generating device 6 and a negative voltage generating device 7. The pipeline 1 is used as the main body of the electrostatic eliminator, the diameter of the pipeline is equal to the diameter of an oil pipeline, and the pipeline is connected in series with the oil pipeline through a connecting flange. The length of the pipeline is 3-7 times of the diameter of the pipeline, the diameter of the pipeline 1 is 50mm, and the diameter of the connecting flange is the same as that of the pipeline flange.
Referring to fig. 1 and 2, the discharge needles are further specifically described, 4 discharge needles are uniformly arranged and arranged at the bottom of the pipeline 1, the polarities of the adjacent discharge needles 3 connected with a power supply are opposite, the discharge ends of the discharge needles wrapped in the insulation blocks are exposed out of the insulation blocks, and the insulation blocks are made of polytetrafluoroethylene. A gap is reserved between the discharge end of each discharge needle 3 and the inner wall of the pipeline, the curvature radius of the end part of each discharge needle is 1000 microns, two adjacent discharge needles 3 are respectively connected with a positive voltage generating device 6 and a negative voltage generating device 7, and the positive voltage generating device 6 is connected with 2 discharge needles for discharging simultaneously; the negative voltage generating device 7 is connected with 2 discharge needles and discharges simultaneously. All arrange the discharge needle 3 in 1 bottom of pipeline and form the recess at the pipeline inner wall, guaranteed that the discharge needle tip is in all the time under the liquid level of oil, still can remain partial oil in the recess that the pipeline inner wall discharge needle exists even when not having the oil in the pipeline to cover the discharge needle tip, not only avoided the direct burning explosion danger that leads to of discharging in the pipeline that oil gas persists of active oil canceller discharge needle, still protected the discharge needle not damaged by the corrosive action.
To further specify the power supply condition of the voltage generating device, the magnitude of the output voltage of the positive voltage generating device 6 and the magnitude of the output voltage of the negative voltage generating device 7 are less than 1500V. The positive voltage generating device 6 can output positive voltage of 0-1500V, and the magnitude can be adjusted. The negative voltage generating device 7 can output negative 0-1500V voltage, and the magnitude can be adjusted. The control device 8 receives the measurement data of the oil charge density monitor 5, and when the detection value is more than 5 mu C/m3At this time, the control device 8 controls the positive voltage generator 6 or the negative voltage generator 7 to discharge.
Further specifically describing the control situation of the control device, the working process of the control device specifically comprises the following steps: when the oil charge density monitor 5 monitors that the charge density in the pipeline is + 5-20 mu C/m3In the meantime, the output voltage of the negative voltage generating device 7 is-0-1500V, the control device 8 controls the negative voltage generating device 7 to be started, and the output voltage of the power supply is adjusted along with the gradient of the charge density and the like. When the oil charge density monitor 5 monitors that the charge density in the pipeline 1 is-5-20 mu C/m3In the meantime, the control device 8 controls the power supply to be turned on, the output voltage of the power supply 1 is + 0-1500V, the control device 8 controls the positive voltage generating device to be turned on, and the output voltage of the power supply 1 is adjusted along with the charge density and other gradients.
The tip of the used discharge needle has smaller curvature radius, so that the discharge needle is easy to ionize and is more beneficial to eliminating oil static electricity; the insulating block is used for ensuring that the discharge needle and the pipeline are not punctured due to discharge, and ensuring that the discharge needle plays a role; the spray point sets up the bottom of pipeline and the discharge end of spray point leaves the clearance with the pipeline inner wall, is easily by oil submergence to avoided the direct burning that discharges and lead to of active oil canceller spray point in the pipeline that oil gas persists to explode the danger.
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 (5)
1. A safe and reliable active oil product static eliminator is characterized by comprising a pipeline, a connecting flange, a discharge needle, an insulating block, an oil product charge density monitor, a positive voltage generating device, a negative voltage generating device and a control device;
the oil charge density monitor is arranged on the pipeline and is connected with the control device through a data line, the control device is respectively connected with the positive voltage generating device and the negative voltage generating device, and the positive voltage generating device and the negative voltage generating device are respectively connected with the discharge needles through leads; the output voltage of the positive voltage generating device and the output voltage of the negative voltage generating device are less than 1500V; the positive voltage generating device is connected with the plurality of discharge needles and discharges simultaneously; the negative voltage generating device is connected with the plurality of discharge needles and discharges simultaneously;
the discharge needle is arranged at the bottom of the pipeline, the discharge end of the discharge needle is wrapped in the insulating block, the insulating block is exposed out of the discharge end, and a gap is reserved between the discharge end of the discharge needle and the inner wall of the pipeline; a plurality of discharge needles are arranged at the bottom of the pipeline at equal intervals, and two adjacent discharge needles are respectively connected with the positive voltage generating device and the negative voltage generating device;
the pipeline is used as the main body of the static eliminator, the diameter of the pipeline is equal to the diameter of the oil pipeline, and the pipeline is connected in series with the oil pipeline through a connecting flange;
the controller receives the measurement data of the oil charge density monitor, and when the detection value is more than 5 mu C/m3When the positive voltage generator or the negative voltage generator is in the positive voltage state, the control device controls the positive voltage generator or the negative voltage generator to discharge; when the oil charge density monitor monitors that the charge density in the pipeline is + 5-20 mu C/m3In the meantime, the output voltage of the negative voltage generating device is-0-1500V, the control device controls the negative voltage generating device to be started, and the output voltage of the power supply is adjusted along with the gradient of the charge density and the like; when the oil charge density monitor monitors that the charge density in the pipeline is-5-20 mu C/m3In the meantime, the control device controls the power supply to be turned on, the output voltage of the power supply is + 0-1500V, the control device controls the positive voltage generating device to be turned on, and the output voltage of the power supply is adjusted along with the charge density and other gradients.
2. The active oil electrostatic eliminator of claim 1, wherein the length of said pipe is 3-7 times of the diameter of said pipe.
3. The active oil electrostatic eliminator of claim 1, wherein said insulating block is made of teflon.
4. The active oil electrostatic eliminator of claim 1, wherein said pipe diameter is 50mm, and the connecting flange and the pipe flange have the same diameter.
5. The active oil electrostatic eliminator of claim 1, wherein the radius of curvature of the discharge needle end is 1000 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711133432.XA CN109310001B (en) | 2017-11-16 | 2017-11-16 | Safe and reliable active oil product static eliminator |
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| CN201711133432.XA CN109310001B (en) | 2017-11-16 | 2017-11-16 | Safe and reliable active oil product static eliminator |
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| CN109310001A CN109310001A (en) | 2019-02-05 |
| CN109310001B true CN109310001B (en) | 2021-02-09 |
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| TWI313054B (en) * | 2003-07-22 | 2009-08-01 | Trinc Or | Static eliminator |
| CN2849430Y (en) * | 2005-10-13 | 2006-12-20 | 江苏东强股份有限公司 | Pipeline type Xelminator |
| CN1769761A (en) * | 2005-10-13 | 2006-05-10 | 江苏东强股份有限公司 | Pipe type static eliminator |
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