CN111522367A - Automatic drainage system of light oil - Google Patents
Automatic drainage system of light oil Download PDFInfo
- Publication number
- CN111522367A CN111522367A CN202010453573.5A CN202010453573A CN111522367A CN 111522367 A CN111522367 A CN 111522367A CN 202010453573 A CN202010453573 A CN 202010453573A CN 111522367 A CN111522367 A CN 111522367A
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- Prior art keywords
- radio frequency
- valve
- frequency admittance
- separation tank
- admittance switch
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
The invention relates to an automatic drainage system of light oil, comprising: the system comprises a separation tank for simulating the internal condition of the internal floating roof storage tank and the internal floating roof storage tank for bearing crude benzene, wherein the separation tank is communicated with the internal floating roof storage tank through a hose; the separation tank is provided with an interface instrument for detecting the distance between the liquid level and the bottom surface and a radio frequency admittance switch for detecting the liquid level, the interface instrument is arranged at the top of the separation tank, and a probe rod of the interface instrument is arranged in the separation tank; the radio frequency admittance switch comprises a benzene phase radio frequency admittance switch and a water phase radio frequency admittance switch; the bottom of the separating tank is communicated with a drain valve; a discharge hole is formed in the side wall of the inner floating roof storage tank; the interface instrument, the radio frequency admittance switch, the first communicating valve, the second communicating valve, the third communicating valve, the fourth communicating valve and the drain valve are respectively connected with the control system. The invention has the characteristics of automatic drainage, oil-water interface identification and prevention of oil from being discharged out of the benzene tank in the drainage process.
Description
Technical Field
The invention relates to the technical field of oily wastewater treatment, in particular to an automatic drainage system for light oil.
Background
In chemical production, crude benzene needs to be periodically kept stand for drainage due to the requirement of quality management, so that the water content of the crude benzene is ensured to meet the quality standard. At present, the water drainage operation is carried out by adopting a separation water tank which can realize oil-water separation by different densities. After the separation water tank is used for a long time, the problem of failure of an oil-water separation function can occur, and the separation water tank cannot be normally used. The drainage can only be realized by manually confirming the oil and the water.
The crude benzene drainage of the chemical production area depends on the drainage after standing and layering of a separation water tank, an oil-water interface can not be distinguished, a separation tank is arranged on crude benzene large-tank drainage equipment, a magnetic turning column liquid level meter is adopted for the liquid level of the separation tank, the oil-water phase interface liquid level can not be detected in the long-term use process, the drainage operation depends on routing inspection and manual experience confirmation of an operator, the efficiency is low, and the risk that oil is discharged from a benzene tank exists. Therefore, a technology capable of identifying an oil-water interface, realizing automatic drainage, and preventing oil from being discharged out of a benzene tank is needed.
Disclosure of Invention
The invention aims to provide an automatic drainage system for light oil, which has the characteristics of automatic drainage, oil-water interface identification and prevention of oil from being discharged out of a benzene tank in the drainage process.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
an automatic drainage system for light oil, comprising: the system comprises a separation tank for simulating the internal condition of the internal floating roof storage tank and the internal floating roof storage tank for bearing crude benzene, wherein a first communicating valve at the upper part of the separation tank and a second communicating valve at the lower part of the separation tank are respectively communicated with a third communicating valve and a fourth communicating valve of the internal floating roof storage tank through hoses, so that the liquid levels of the separation tank and the internal floating roof storage tank are synchronous; the separation tank is provided with an interface instrument for detecting the distance between the liquid level and the bottom surface and a radio frequency admittance switch for detecting the liquid level, the interface instrument adopts the radio frequency admittance interface instrument, the interface instrument is arranged at the top of the separation tank, and a probe rod of the interface instrument is arranged in the separation tank; the radio frequency admittance switch comprises a benzene phase radio frequency admittance switch for detecting a high liquid level and a water phase radio frequency admittance switch for detecting a low liquid level, and the benzene phase radio frequency admittance switch first corresponding connecting valve is arranged on one side of the separation tank; the water-phase radio frequency admittance switch is arranged at one side of the separation tank corresponding to the fourth communication valve; the bottom of the separating tank is communicated with a drain valve; a discharge port is formed in the side wall of the inner floating roof storage tank and is arranged between the third communicating valve and the fourth communicating valve; the interface instrument, the radio frequency admittance switch, the first communicating valve, the second communicating valve, the third communicating valve, the fourth communicating valve and the drain valve are respectively connected with the control system, so that automatic control is realized.
Preferably, the horizontal position of benzene phase radio frequency admittance switch sets up on the discharge gate, improves the precision of drainage, prevents that crude benzol from discharging by mistake, ensures that finished product crude benzol moisture is qualified.
Preferably, the horizontal position of the water-phase radio frequency admittance switch is arranged below the discharge port, and the installation height of the water-phase radio frequency admittance switch is 500mm-700mm, so that the crude benzene value at the discharge port is ensured to be accurate, and the crude benzene is ensured to be qualified and delivered.
Preferably, the horizontal position of the drain valve is arranged below the water-phase radio frequency admittance switch, and the height of the drain valve is 260-300 mm from the ground, so that thorough drainage is ensured.
Preferably, a stop valve is arranged between the separation tank and the drain valve, and the stop valve is connected with the control system and used for cutting off the drain in case of emergency and below a set lowest position.
Preferably, the control system adopts a DCS control system, and can provide data sharing of a plurality of control stations, so that the operation is convenient.
Compared with the prior art:
the separation tank is provided with an interface instrument for detecting the distance between the liquid level and the bottom surface and a radio frequency admittance switch for detecting the liquid level, the interface instrument adopts the radio frequency admittance interface instrument, the radio frequency admittance switch comprises a benzene phase radio frequency admittance switch and a water phase radio frequency admittance switch, and the benzene phase radio frequency admittance switch is arranged on one side of the separation tank in a first corresponding connection valve; the water phase radio frequency admittance switch is arranged on one side of the separation tank corresponding to the fourth communication valve, and automatic drainage is realized through connection with the control system; the benzene phase radio frequency admittance switch and the water phase radio frequency admittance switch are accurately arranged, so that the oil-water interface can be identified, and the drainage process is prevented from being discharged out of the benzene tank.
Drawings
FIG. 1 is a schematic structural view of an automatic drainage system for light oil in an embodiment of the present invention;
in the figure, 1-the separation tank; 2-an inner floating roof storage tank; 3-a first communication valve; 4-a second communication valve; 5-interface instrument; a 6-benzene phase radio frequency admittance switch; 7-aqueous phase radio frequency admittance switch; 8-a third communication valve; 9-a fourth communication valve; 10-a drain valve; 11-a discharge hole; 12-a shut-off valve.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are provided to illustrate the present invention, and furthermore, the terms "first", "second", etc. are used only for descriptive distinction and are not intended to have a special meaning, but are not intended to limit the scope of the present invention.
Referring to fig. 1, an embodiment of the present application provides an automatic drainage system for light oil, including: the system comprises a separation tank 1 for simulating the internal condition of an internal floating roof storage tank 2 and the internal floating roof storage tank 2 for bearing crude benzene, wherein a first communicating valve 3 at the upper part of the separation tank 1 and a second communicating valve 4 at the lower part of the separation tank are respectively communicated with a third communicating valve 8 and a fourth communicating valve 9 of the internal floating roof storage tank 2 through hoses, so that the liquid levels of the separation tank 1 and the internal floating roof storage tank 2 are synchronous; the separation tank 1 is provided with an interface instrument 5 for detecting the distance between the liquid level and the bottom surface and a radio frequency admittance switch for detecting the liquid level, the interface instrument 5 adopts a radio frequency admittance interface instrument, the interface instrument 5 is arranged at the top of the separation tank 1, and a probe rod of the interface instrument 5 is arranged in the separation tank 1; the radio frequency admittance switch comprises a benzene phase radio frequency admittance switch 6 for detecting a high liquid level and a water phase radio frequency admittance switch 7 for detecting a low liquid level, and the benzene phase radio frequency admittance switch 6 is arranged on one side of the separation tank 1 corresponding to the first connecting valve; the water-phase radio frequency admittance switch 7 is arranged at one side of the separation tank 1 corresponding to the fourth communicating valve 9; the bottom of the separation tank 1 is communicated with a drain valve 10; the lateral wall of the inner floating roof storage tank 2 is provided with a discharge port 11, and the discharge port 11 is arranged between the third communicating valve 8 and the fourth communicating valve 9.
The horizontal position of the benzene phase radio frequency admittance switch 6 is arranged on the discharge hole 11, so that the precision of water discharge is improved, the crude benzene is prevented from being discharged by mistake, and the water content of the finished crude benzene is ensured to be qualified. The horizontal position of the water-phase radio frequency admittance switch 7 is arranged below the discharge hole 11, and the installation height of the water-phase radio frequency admittance switch 7 is 500mm-700mm, so that the crude benzene value at the position of the discharge hole 11 is accurate, and the crude benzene is qualified and delivered.
A cut-off valve 12 is arranged between the separation tank 1 and the drain valve 10, and the cut-off valve 12 is connected with a control system and used for cutting off the drain in case of emergency and the set value is lower than the lowest level.
The interface instrument 5, the radio frequency admittance switch, the first communicating valve 3, the second communicating valve 4, the third communicating valve 8, the fourth communicating valve 9 and the drain valve 10 are respectively connected with a control system to realize automatic control. The control system adopts a DCS control system, can provide a plurality of control stations to share data, and is convenient to operate.
Under the action of a DCS control system, an interface instrument 5 continuously indicates an oil-water interface, a radio frequency admittance switch accurately detects oil and water media, and when a benzene phase radio frequency admittance switch 6 at a high liquid level detects water, a drain valve 10 is opened to realize automatic drainage. When the water phase radio frequency admittance switch 7 at the low liquid level detects the oil interface, the drain valve 10 is closed. And when the inner floating roof storage tank 2 is fed, the first communicating valve 3, the second communicating valve 4, the third communicating valve 8 and the fourth communicating valve 9 are closed, and the first communicating valve 3, the second communicating valve 4, the third communicating valve 8 and the fourth communicating valve 9 are opened 12 hours after the feeding is finished to continuously monitor the oil-water condition in the separation tank 1.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. An automatic drainage system of light oil is characterized by comprising: the device comprises a separation tank (1) and an inner floating roof storage tank (2), wherein a first communication valve (3) at the upper part of the separation tank (1) and a second communication valve (4) at the lower part of the separation tank are respectively communicated with a third communication valve (8) and a fourth communication valve (9) of the inner floating roof storage tank (2) through hoses; the separation tank (1) is provided with an interface instrument (5) and a radio frequency admittance switch, the interface instrument (5) is arranged at the top of the separation tank (1), and a probe rod of the interface instrument (5) is arranged in the separation tank (1); the radio frequency admittance switch comprises a benzene-phase radio frequency admittance switch (6) and a water-phase radio frequency admittance switch (7), and the benzene-phase radio frequency admittance switch (6) is arranged on one side of the separation tank (1) corresponding to the first communicating valve; the water-phase radio frequency admittance switch (7) is arranged at one side of the separation tank (1) corresponding to the fourth communicating valve (9); the bottom of the separating tank (1) is communicated with a drain valve (10); a discharge hole (11) is formed in the side wall of the inner floating roof storage tank (2), and the discharge hole (11) is formed between the third communicating valve (8) and the fourth communicating valve (9); the interface instrument (5), the radio frequency admittance switch, the first communicating valve (3), the second communicating valve (4), the third communicating valve (8), the fourth communicating valve (9) and the drain valve (10) are respectively connected with the control system.
2. The automatic drainage system of light oil according to claim 1, wherein the benzene phase radio frequency admittance switch (6) is horizontally disposed on the discharge port (11).
3. The automatic drainage system of light oil according to claim 2, wherein the horizontal position of the water-phase radio frequency admittance switch (7) is arranged below the discharge hole (11).
4. The automatic drainage system of light oil according to claim 3, wherein the horizontal position of the drainage valve (10) is arranged below the water-phase radio frequency admittance switch (7).
5. The automatic drainage system of light oil according to claim 4, characterized in that a shut-off valve (12) is arranged between the separation tank (1) and the drainage valve (10), and the shut-off valve (12) is connected with a control system.
6. The automatic drainage system of light oil according to claim 5, wherein the control system is a DCS control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010453573.5A CN111522367B (en) | 2020-05-26 | 2020-05-26 | Automatic drainage system of light oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010453573.5A CN111522367B (en) | 2020-05-26 | 2020-05-26 | Automatic drainage system of light oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111522367A true CN111522367A (en) | 2020-08-11 |
| CN111522367B CN111522367B (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010453573.5A Active CN111522367B (en) | 2020-05-26 | 2020-05-26 | Automatic drainage system of light oil |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050247642A1 (en) * | 2004-05-04 | 2005-11-10 | Ramvac Dental Products, Inc. | Separating tank assembly and method of draining separating tank |
| CN201423191Y (en) * | 2009-03-04 | 2010-03-17 | 洪鹤 | Cylinder-divided membrane oil-trap dewatering device |
| CN102109372A (en) * | 2011-01-21 | 2011-06-29 | 中国科学院力学研究所 | Measurement method of oil-water interface |
| KR101578206B1 (en) * | 2015-09-08 | 2015-12-16 | 박수철 | Automatic device of water supply and drain for livestock |
| CN106630215A (en) * | 2016-08-17 | 2017-05-10 | 广东聚源环保科技股份有限公司 | Efficient oil-water separation device for restaurant wastewater |
| CN106916726A (en) * | 2017-03-24 | 2017-07-04 | 中国科学院青岛生物能源与过程研究所 | A kind of fermentation process coupled with separation system for continuously fermenting on a large scale |
| CN109665227A (en) * | 2017-10-13 | 2019-04-23 | 中国石化工程建设有限公司 | Gas pipeline purging equipment for internal floating roof tank |
-
2020
- 2020-05-26 CN CN202010453573.5A patent/CN111522367B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050247642A1 (en) * | 2004-05-04 | 2005-11-10 | Ramvac Dental Products, Inc. | Separating tank assembly and method of draining separating tank |
| CN201423191Y (en) * | 2009-03-04 | 2010-03-17 | 洪鹤 | Cylinder-divided membrane oil-trap dewatering device |
| CN102109372A (en) * | 2011-01-21 | 2011-06-29 | 中国科学院力学研究所 | Measurement method of oil-water interface |
| KR101578206B1 (en) * | 2015-09-08 | 2015-12-16 | 박수철 | Automatic device of water supply and drain for livestock |
| CN106630215A (en) * | 2016-08-17 | 2017-05-10 | 广东聚源环保科技股份有限公司 | Efficient oil-water separation device for restaurant wastewater |
| CN106916726A (en) * | 2017-03-24 | 2017-07-04 | 中国科学院青岛生物能源与过程研究所 | A kind of fermentation process coupled with separation system for continuously fermenting on a large scale |
| CN109665227A (en) * | 2017-10-13 | 2019-04-23 | 中国石化工程建设有限公司 | Gas pipeline purging equipment for internal floating roof tank |
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| Publication number | Publication date |
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| CN111522367B (en) | 2023-04-18 |
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