CN218584158U - Deviation correcting system for remote transmission liquid level meter - Google Patents
Deviation correcting system for remote transmission liquid level meter Download PDFInfo
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- CN218584158U CN218584158U CN202222749338.XU CN202222749338U CN218584158U CN 218584158 U CN218584158 U CN 218584158U CN 202222749338 U CN202222749338 U CN 202222749338U CN 218584158 U CN218584158 U CN 218584158U
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Abstract
The utility model provides a teletransmission level gauge deviation correction system relates to petrochemical equipment technical field. Comprises a regeneration tower, an on-site liquid level meter, a correction liquid level meter and a control system. The on-site liquid level meter is communicated with the regeneration tower through the first valve and the second valve respectively, the correction liquid level meter is installed on the surface of the on-site liquid level meter, the liquid level indicating piece of the correction liquid level meter is matched with the liquid level indicating piece of the on-site liquid level meter in a magnetic attraction mode, and the correction liquid level meter is in communication connection with the control system. The liquid level meter is corrected through the setting, the liquid level indicator piece of the liquid level meter and the field liquid level meter is enabled to be magnetically attracted and matched, the liquid level value measured by the field liquid level meter can be directly read out by the correction liquid level meter, the liquid level value is transmitted to the control system, and the liquid level information of the field liquid level meter can be directly received by the control system.
Description
Technical Field
The utility model relates to a petrochemical equipment technical field particularly, relates to a teletransmission level gauge deviation correction system.
Background
The flow of a semi-lean liquid pump at the bottom of a normal-pressure regeneration tower T-6502 of an oil product center oil product device decarbonization unit is about 850T/h, and the liquid output amount of the semi-lean liquid pump is large, so that the liquid level of the regeneration tower needs to be accurately detected, timely liquid supplement is facilitated, and the semi-lean liquid pump is prevented from being empty, affecting the normal operation of the decarbonization unit, damaging equipment and causing working condition fluctuation.
Because the installation position of the normal pressure regeneration tower T-6502 of the decarburization unit is inconvenient for long-term field maintenance, a differential pressure type remote liquid level meter is generally adopted to transmit liquid level information to a control center, and the control center performs liquid supplementing or maintenance according to liquid level data. The inventor finds that the liquid level value of the differential pressure type remote transmission liquid level meter is greatly influenced by the temperature, so that the deviation between the transmitted liquid level signal and the actual liquid level is large, the maximum liquid level deviation can reach about 80%, and the serious threat is caused to the stable operation of a regeneration tower and a decarburization unit.
In view of this, the utility model is especially provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a teletransmission level gauge deviation correction system, its liquid level data that can control the teletransmission and the error range of the interior actual liquid level data of regenerator column have guaranteed the steady operation of regenerator column and decarbonization unit in the permissible range.
The embodiment of the utility model is realized like this:
in a first aspect, the utility model provides a system is corrected to teletransmission level gauge deviation, including regeneration tower, on-the-spot level gauge, correction level gauge and control system.
The on-site liquid level meter is communicated with the regeneration tower through the first valve and the second valve respectively, the correction liquid level meter is installed on the surface of the on-site liquid level meter, the liquid level indicating piece of the correction liquid level meter is matched with the liquid level indicating piece of the on-site liquid level meter in a magnetic attraction mode, and the correction liquid level meter is in communication connection with the control system.
The utility model discloses a level gauge is corrected in the setting to the cooperation is inhaled to the liquid level indicator magnetism that makes correction level gauge and on-the-spot level gauge, makes correction level gauge can directly read out on-the-spot level gauge measuring level value, and transmits this level value to control system, makes control system can directly receive on-the-spot level gauge's liquid level information.
In an alternative embodiment, the leveling gauge comprises any one of a level sensor or a reed pipe gauge.
When the magnetic floater outside the pipe changes up and down along with the liquid level, the dry springs at the liquid level in the main guide pipe are sequentially connected, so that the resistance value of the sensor changes, and the resistance value is converted into a liquid level display value through the circuit module. The utility model discloses the dry reed pipe type level gauge and level sensor who use in all are the conventional structure of market, and its signal transmission mode is also current, as long as can with the liquid level signal transmission to control system of on-the-spot level gauge can.
In an alternative embodiment, the field level gauge is a magnetic flip-board level gauge.
In an alternative embodiment, the range of the on-site level gauge is within 60 to 100% of the regenerator column level height. For example, when the height of the liquid level in the regeneration tower is 6m, the range of the liquid level meter on site is 3.6 to 6m, or 3.85 to 5.85 m.
In an alternative embodiment, the leveling gauge may also be provided with alarm warnings, which may be provided at 70%, 65%, 50% and 45% of the range of the on-site gauge, respectively.
For example, when the range of the on-site liquid level meter is 3.85-5.85 m of the height of the liquid level of the regeneration tower, the alarm warning liquid levels are 5.25m, 5.15m, 4.85m and 4.75m respectively, and are used for reminding an operator of liquid supplement.
Because the liquid contained in the normal pressure regeneration tower of the decarburization unit is easy to crystallize in the long-term storage process, and the liquid level measurement precision of the on-site liquid level meter is influenced, in order to ensure that the liquid level of the regeneration tower is as accurate as possible, the inventor proposes the following solution.
In an optional embodiment, the system further comprises a remote transmission liquid level device, wherein the remote transmission liquid level device comprises a differential pressure type liquid level meter, and the differential pressure type liquid level meter is communicated with the regeneration tower through a pipeline and is in communication connection with the control system.
Through setting up a teletransmission liquid level device again, can make the liquid level data that the differential level gauge of pressure detected obtained in the teletransmission liquid level device compare with the liquid level data that on-the-spot level gauge detected, obtain comparatively accurate liquid level information.
In an alternative embodiment, the remote liquid level transmission device further comprises a capillary tube, the capillary tube is mounted at the inlet end and/or the outlet end of the differential pressure type liquid level meter, and the capillary tube is communicated with the external air pipe.
In an alternative embodiment, the surface of the capillary tube is provided with thermal insulation.
Because differential level gauge receives temperature influence liquid level variation great, consequently sets up the heat insulating part on the surface of capillary, avoids external temperature to cause the influence to the capillary, simultaneously with capillary and external tuber pipe switch-on, when differential level gauge's liquid level skew is great, external tuber pipe lets in non-purified wind, cools down capillary and differential level gauge, reduces the liquid level error.
In an optional implementation mode, the device further comprises a liquid level prompting switch, and the liquid level prompting switch is installed on the tower wall of the regeneration tower and used for early warning and liquid supplementing.
In an alternative embodiment, the liquid level prompting switch is arranged at the height of 20-50% of the liquid level of the regeneration tower. For example, if the height of the liquid level in the regeneration tower is 6m, the position of the liquid level indication switch may be 4.5 m. When the liquid level in the regeneration tower is lower than 4.5m, the liquid level prompting switch sends out an early warning signal, and when the liquid level is higher than 4.5m, the liquid level prompting switch does not send out the early warning signal.
In alternative embodiments, the control system may be a distributed control system or other existing control system, so long as receiving the level signal is enabled.
The embodiment of the utility model provides a beneficial effect is:
the utility model provides a teletransmission level gauge deviation correction system corrects the level gauge through setting up to the cooperation is inhaled to the liquid level indicator magnetism that makes correction level gauge and on-the-spot level gauge, makes and corrects the level gauge and can directly read out on-the-spot level gauge measuring level value, and transmits this level value to control system, makes control system can directly receive on-the-spot level gauge's liquid level information.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a deviation correction system of a remote liquid level meter according to a first embodiment of the present invention;
fig. 2 is a line diagram of liquid level variation according to the first embodiment of the present invention.
100-deviation correction system of remote transmission liquid level meter; 110-a regeneration column; 120-field level gauge; 130-a correction level gauge; 131-field level; 140-differential pressure level gauge; 141-remote liquid level; 150-liquid level prompting switch; 161-offset; 162-temperature at capillary.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
First embodiment
Referring to fig. 1, the present embodiment provides a remote liquid level meter deviation correction system 100, which includes a regeneration tower 110, an on-site liquid level meter 120, a correction liquid level meter 130 and a control system (not shown).
The regeneration tower 110 provided by the embodiment is a regeneration tower of a T-6502 model.
The on-site liquid level meter 120 is communicated with the regeneration tower 110 through a first valve and a second valve respectively, the correction liquid level meter 130 is installed on the outer side of the on-site liquid level meter 120, a liquid level indicator of the correction liquid level meter 130 is matched with a liquid level indicator of the on-site liquid level meter 120 in a magnetic attraction mode, and the correction liquid level meter 130 is in communication connection with the control system.
In the present embodiment, the leveling level gauge 130 is a dry reed type level gauge. The liquid level meter is an externally attached liquid level meter, and a main guide pipe is internally provided with a group of reed pipes and a precise resistor. When the magnetic floater outside the pipe changes up and down along with the liquid level, the dry springs positioned at the liquid level in the main guide pipe are sequentially connected to change the resistance value of the sensor, and the resistance value is converted into a liquid level display value through the circuit module.
In this embodiment, the in-situ level gauge 120 is a magnetic flip-board level gauge.
In this embodiment, the height of the liquid level in the regeneration tower 110 is 6m, and the range of the on-site liquid level meter 120 is 3.85 to 5.85 m.
In this embodiment, the remedial level meter 130 may also be provided with alarm alerts, which may be provided at 70%, 65%, 50%, and 45% of the range of the on-site level meter 120, respectively. Namely, the alarm warning liquid levels of the correction liquid level meter 130 are respectively 5.25m, 5.15m, 4.85m and 4.75m, and are used for reminding an operator to replenish liquid.
Since the liquid contained in the atmospheric regenerator 110 of the decarbonization unit is easy to crystallize during long-term storage, which affects the accuracy of the level measurement of the on-site level gauge 120, in order to ensure that the liquid level in the regenerator 110 is as accurate as possible, in this embodiment, the liquid level meter further includes a remote transmission liquid level 141 device, and the remote transmission liquid level 141 device includes a differential pressure type liquid level gauge 140 and a capillary tube (not shown in the figure).
The differential pressure gauge 140 is in communication with the regeneration tower 110 via a conduit and is in communication with the control system. The two capillary tubes are respectively arranged at the inlet end and the outlet end of the differential pressure type liquid level meter 140, the capillary tubes are communicated with an external air pipe, and the surfaces of the two capillary tubes are provided with heat insulation pieces.
In this embodiment, in order to obtain the fluid replacement signal more accurately, a fluid level indicating switch 150 is installed on the wall of the regeneration tower 110.
In this embodiment, the liquid level indicating switch 150 is set at 4.5m of the height of the liquid level in the regeneration tower 110. When the liquid level in the regeneration tower 110 is lower than 4.5m, the liquid level prompting switch 150 sends out an early warning signal, and when the liquid level is higher than 4.5m, the liquid level prompting switch 150 does not send out the early warning signal, so that the situation that the liquid level information of the on-site liquid level meter 120 and the remote transmission liquid level 141 is not timely is avoided, and the liquid can be directly and quickly early warned and replenished.
The deviation correcting system 100 for the remote liquid level meter provided by the embodiment has the following working principle:
referring to fig. 2, the in-situ level gauge 120 detects the liquid level in the regeneration tower 110, and the reed in the reed pipe level gauge floats with the magnetic liquid level indicator of the in-situ level gauge 120 and transmits the signal to the control system. The control system receives the liquid level signal of the reed pipe liquid level meter, so as to obtain a field liquid level 131 signal measured by the field liquid level meter 120. The differential pressure gauge 140 simultaneously senses the level of the liquid in the regenerator column 110 and transmits the height information to the control system, which receives the remote liquid level 141 signal from the differential pressure gauge 140. Whether the remote fluid level 141 signal of the differential pressure gauge 140 is offset is determined by comparing the received field fluid level 131 signal and the remote fluid level 141 signal received in the control system. Before the point on the abscissa of fig. 2 of 35, there is a large deviation 161 between the site fluid level 131 and the remote fluid level 141.
The non-purified gas is introduced into the capillary from the point 35, the temperature of the capillary is reduced, the on-site liquid level 131 and the remote liquid level 141 are approximately overlapped, and the deviation 161 is correspondingly reduced to be within 20 percent.
Further, observing the temperature 162 at the capillary tube, when the temperature 162 at the capillary tube is higher than 35 ℃, the field level 131 rises sharply with the remote level 141 unchanged until the full scale, at which time the non-purified wind should be turned on, controlling the field level 131 and the remote level 141 to show substantial agreement. When the temperature 162 at the capillary tube is lower than 30 ℃, the field liquid level 131 begins to drop rapidly under the condition that the remote transmission liquid level 141 is not changed, at this time, non-purified air should be properly turned down, and the temperature 162 at the capillary tube is controlled between 30 ℃ and 35 ℃ to ensure that the field liquid level 131 and the remote transmission liquid level 141 are approximately equal.
When the liquid level in the regeneration tower 110 is reduced to 5.25m, 5.15m, 4.85m and 4.75m respectively, the reed pipe liquid level meter sends out a warning signal to remind of liquid supplement; when the liquid level in the regeneration tower 110 is reduced to 4.5m, the liquid level prompting switch 150 sends out a warning signal to remind the liquid replenishing again.
The embodiment of the utility model provides a teletransmission level gauge deviation correction system 100, it has following advantage at least:
1) Through setting up correction level gauge 130 to make the cooperation of correcting the liquid level indicator magnetism of level gauge 130 and on-the-spot level gauge 120, make correct level gauge 130 can directly read out the measured liquid level value of on-the-spot level gauge 120, and transmit this liquid level value to control system, make control system can directly receive on-the-spot level gauge 120's liquid level information. The method can directly omit the existing remote transmission liquid level 141 meter, avoid the error of the liquid level information and obtain more accurate liquid level data.
2) In some embodiments, the utility model discloses can also increase a differential level gauge 140 again, differential level gauge 140 indicates the actual liquid level of regenerator column 110 with on-the-spot level gauge 120 jointly, in order to avoid differential level gauge 140's liquid level data to produce deviation 161, can also correct the liquid level height adjustment capillary's of on-the-spot level gauge 120 of level gauge 130 transmission temperature through observing to correct differential level gauge 140's liquid level data.
3) Because differential level gauge 140 receives temperature influence liquid level change great, consequently sets up the heat insulating part on the surface of capillary, avoids ambient temperature to cause the influence to the capillary, with capillary and external tuber pipe switch-on simultaneously, when differential level gauge 140's liquid level skew is great, external tuber pipe lets in non-purified wind, cools down capillary and differential level gauge 140, reduces the liquid level error.
4) The liquid level switch can prompt the low value of the liquid level of the regeneration tower 110, so that the liquid can be conveniently replenished by an operator in time.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A deviation correction system of a remote transmission liquid level meter is characterized by comprising a regeneration tower, an on-site liquid level meter, a correction liquid level meter and a control system;
the on-site liquid level meter is respectively communicated with the regeneration tower through a first valve and a second valve, the correction liquid level meter is installed on the surface of the on-site liquid level meter, the liquid level indicating piece of the correction liquid level meter is matched with the liquid level indicating piece of the on-site liquid level meter in a magnetic absorption mode, and the correction liquid level meter is in communication connection with the control system.
2. The remote transmission liquid level meter deviation correction system according to claim 1, wherein the correction liquid level meter comprises any one of a liquid level sensor or a reed pipe type liquid level meter.
3. The remote level gauge deviation correction system of claim 2, wherein the field level gauge is a magnetic flip-board level gauge.
4. The remote-transmission level gauge deviation correction system of claim 3, wherein the range of the on-site level gauge is in the range of 60-100% of the regenerator column level height.
5. The system of claim 2 or 3, further comprising a remote fluid level assembly comprising a differential fluid level gauge in communication with the regeneration tower and the control system via a conduit.
6. The system of claim 5, wherein the remote-sensing liquid level apparatus further comprises a capillary tube, the capillary tube is mounted at the inlet end and/or the outlet end of the differential pressure type liquid level meter, and the capillary tube is in communication with an external air pipe.
7. The remote liquid level gauge deviation correction system of claim 6, wherein the surface of said capillary tube is provided with thermal insulation.
8. The deviation correction system for the remote liquid level meter according to claim 1, further comprising a liquid level prompting switch, wherein the liquid level prompting switch is mounted on the tower wall of the regeneration tower and used for early warning and liquid replenishment.
9. The system of claim 8, wherein the liquid level indication switch is installed at a height of 20-50% of the liquid level of the regeneration tower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222749338.XU CN218584158U (en) | 2022-10-19 | 2022-10-19 | Deviation correcting system for remote transmission liquid level meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222749338.XU CN218584158U (en) | 2022-10-19 | 2022-10-19 | Deviation correcting system for remote transmission liquid level meter |
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| CN218584158U true CN218584158U (en) | 2023-03-07 |
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| CN202222749338.XU Active CN218584158U (en) | 2022-10-19 | 2022-10-19 | Deviation correcting system for remote transmission liquid level meter |
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