CN213209191U - Distillation column liquid level measurement system - Google Patents
Distillation column liquid level measurement system Download PDFInfo
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- CN213209191U CN213209191U CN202021749243.2U CN202021749243U CN213209191U CN 213209191 U CN213209191 U CN 213209191U CN 202021749243 U CN202021749243 U CN 202021749243U CN 213209191 U CN213209191 U CN 213209191U
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Abstract
A distillation column level measurement system comprising: the distillation tower comprises a distillation tower, a high-pressure measuring blowing pipeline connected with a high-pressure taking port on the distillation tower, a low-pressure measuring blowing pipeline communicated with a low-pressure taking port on the distillation tower and a differential pressure liquid level meter; the high pressure measurement air blowing pipeline with low pressure measurement air blowing pipeline between connect the differential pressure level gauge, high pressure measurement air blowing pipeline with the other end of low pressure measurement air blowing pipeline be the nitrogen gas entry, high pressure measurement air blowing pipeline with low pressure measurement air blowing pipeline on be provided with ball valve, check valve and mass flow meter respectively, high pressure measurement air blowing pipeline with the one end that low pressure measurement air blowing pipeline be close to the distillation column be equipped with temperature control equipment. The utility model provides a distillation column liquid level measurement system compact structure, easy operation, measurement accuracy is higher.
Description
Technical Field
The utility model relates to an equipment liquid level measurement system, more specifically relates to a liquid level measurement system for heavy oil continuous distillation device.
Background
The atmospheric and vacuum distillation device is also used as a tap device of a conventional refinery and plays an important role in the research stage of a laboratory. The distillation is a simple and effective separation mode for cutting heavy oil fractions, and the continuous distillation device can reduce material loss in the scientific research process and improve the experimental efficiency. For a continuous distillation device, the liquid level of a distillation tower is an important operation index, and the fluctuation of the liquid level directly influences the distillation effect and the product quality. Therefore, the liquid level control of the distillation tower is very important, so that an effective measuring device is needed for liquid level measurement of the continuous distillation device.
CN203976725U discloses a laboratory atmospheric and vacuum continuous distillation device, which comprises a raw material pretreatment system, a distillation tower, a tower top/tower bottom discharge collection system and a vacuum system, wherein the vacuum system consists of a main vacuum-pumping system and a pre-vacuum-pumping system, and the vacuum system is connected with the distillation tower part and the tower top/tower bottom discharge collection system.
CN110081952A discloses a coal tar distillation decompression tower bottom liquid level measurement device, introduces the device's constitution, including pressing from both sides cover measuring cylinder, second flange, decompression tower and barrel, the device is through the mutual cooperation of two flange differential pressure transmitter, top dress interior floater level gauge and cover measuring cylinder to the liquid level measure, but the device structure is more complicated, and is not suitable for the continuous distillation process of comparatively heavy material.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a distillation column liquid level measurement system on prior art's basis.
The utility model provides a distillation column liquid level measurement system, include: the distillation tower comprises a distillation tower, a high-pressure measuring blowing pipeline connected with a high-pressure taking port on the distillation tower, a low-pressure measuring blowing pipeline communicated with a low-pressure taking port on the distillation tower and a differential pressure liquid level meter; the high pressure measurement air blowing pipeline with low pressure measurement air blowing pipeline between connect the differential pressure level gauge, high pressure measurement air blowing pipeline with the other end of low pressure measurement air blowing pipeline be the nitrogen gas entry, high pressure measurement air blowing pipeline with low pressure measurement air blowing pipeline on be provided with ball valve, check valve and mass flow meter respectively, high pressure measurement air blowing pipeline with one section that low pressure measurement air blowing pipeline be close to the distillation column be equipped with temperature control equipment.
The utility model provides a distillation column liquid level measurement system application method, include:
before the distillation device is fed, setting the temperature of temperature control equipment on a low-pressure measurement blowing pipeline and a high-pressure measurement blowing pipeline to be 150-200 ℃, opening ball valves on the low-pressure measurement blowing pipeline and the high-pressure measurement blowing pipeline, and enabling check valves on the low-pressure measurement blowing pipeline and the high-pressure measurement blowing pipeline to be in a normally closed state; the mass flow meters on the low-pressure taking and pressure measuring air blowing pipeline and the high-pressure measuring air blowing pipeline are set to have the same flow value, and when the readings of the two mass flow meters are stable, the differential pressure liquid level meter can measure the liquid level.
And the high-pressure measurement air blowing pipeline and the low-pressure measurement air blowing pipeline accurately control the nitrogen flow through a mass flowmeter, and the nitrogen flow value is 5-500 mL/min. A nitrogen pipeline close to the distillation tower is provided with a heating wire capable of automatically controlling the temperature, so that the pipeline is prevented from being blocked after heavy materials in the tower enter a pressure measuring pipeline, and the temperature control range is 0-220 ℃.
The utility model provides a distillation column liquid level measurement system's beneficial effect does:
the utility model provides a distillation column liquid level measurement system compact structure, easy operation, measurement accuracy is higher. Pressure measuring blowing pipelines are respectively arranged at the high-pressure taking port and the low-pressure taking port, so that heavy materials can be effectively prevented from entering the pipelines to form blockage. In the using process, the mass flow meter is used for accurately controlling the nitrogen flow in the two pressure measuring and blowing pipelines to be the same, so that the influence of blowing on liquid level measurement can be eliminated. The device is suitable for liquid level measurement of a heavy oil continuous distillation device.
Drawings
FIG. 1 is a schematic structural diagram of a distillation column liquid level measuring system;
FIG. 2 is a schematic diagram of a tuning fork level gauge;
in the figure: 1-low pressure measuring and blowing pipeline electric heating wire; 2. 6, 9, 13-ball valve; 3. 14-pressure taking port check valve; 4. 5-mass flow meter; 7-a balancing valve; 8-differential pressure level gauge; 10-a protective barrier; 11-tuning fork level gauge; 12-high pressure measuring and blowing pipeline electric heating wire; 15-vibrating piece; a 16-pronged body; 17-an installation interface; 18-a signal sensor; 19-electrical interface.
Detailed Description
The following detailed description of the embodiments of the present invention is not intended to limit the invention.
The utility model provides a distillation column liquid level measurement system, include: the distillation tower comprises a distillation tower, a high-pressure measuring blowing pipeline connected with a high-pressure taking port on the distillation tower, a low-pressure measuring blowing pipeline communicated with a low-pressure taking port on the distillation tower and a differential pressure liquid level meter; the high pressure measurement air blowing pipeline with low pressure measurement air blowing pipeline between connect the differential pressure level gauge, high pressure measurement air blowing pipeline with the other end of low pressure measurement air blowing pipeline be the nitrogen gas entry, high pressure measurement air blowing pipeline with low pressure measurement air blowing pipeline on be provided with ball valve, check valve and mass flow meter respectively, high pressure measurement air blowing pipeline with one section that low pressure measurement air blowing pipeline be close to the distillation column be equipped with temperature control equipment.
Preferably, the distillation tower liquid level measuring system further comprises a tuning fork side position gauge arranged on the distillation tower and a protective baffle plate positioned at the upper part of the tuning fork side position gauge.
Preferably, the tuning fork liquid level meter is obliquely arranged, and the included angle between the tuning fork liquid level meter and the horizontal plane is 30-45 degrees.
Preferably, the distillation tower comprises an upper tower body and a lower tower kettle, wherein the height of the tower body is 1-5 m, the inner diameter is 100-300 mm, the height of the tower kettle is 0.8-1.2 m, and the inner diameter is 50-100 mm.
Preferably, the tuning fork liquid level meter is arranged on the side wall of the tower kettle and is 50mm-200mm away from the bottom of the tower body.
Preferably, the tuning fork liquid level meter consists of a vibrating reed, a fork body, a mounting interface, a signal sensor and an electrical apparatus interface which are connected in sequence, wherein the length of the fork body is 100mm-150 mm. The utility model discloses a fork length of tuning fork level gauge be longer than the fork length of the conventional tuning fork level gauge that is arranged in the chemical container to measure the liquid level, extend 30-50%. The tuning fork liquid level meter prolongs the fork body, so that the distance between the vibrating plate and the signal sensor is increased, and the influence of heat conduction on electronic components in the signal sensor in the working state of the tuning fork liquid level meter is reduced.
Preferably, the high-pressure tapping is positioned at the bottom of the distillation tower and is 500mm-900mm away from the bottom of the tower body; the low-pressure taking port is positioned on the tower body of the distillation tower and is 800mm-1100mm away from the bottom of the tower body.
Preferably, ball valves are respectively arranged on connecting pipelines of the differential pressure liquid level meter and the high-pressure measuring blowing pipeline and the low-pressure measuring blowing pipeline, and a balance valve is arranged on a bypass.
Preferably, the temperature control device is an electric heating wire with adjustable temperature. More preferably, the length of the pipeline for arranging the electric heating wire is 400mm-1000 mm.
In the distillation tower liquid level measuring system provided by the invention, the tower body height of the distillation tower is preferably 2m-3 m; the internal diameter is preferably 150mm to 250 mm.
The utility model provides a distillation column liquid level measurement system application method, include:
before the distillation device is fed, setting the temperature of temperature control equipment on a low-pressure measurement blowing pipeline and a high-pressure measurement blowing pipeline to be 150-200 ℃, opening ball valves on the low-pressure measurement blowing pipeline and the high-pressure measurement blowing pipeline, preferably opening ball valves on connecting pipelines of a differential pressure liquid level meter and the high-pressure measurement blowing pipeline and the low-pressure measurement blowing pipeline, and opening a balance valve on a bypass; and setting the same flow value for the mass flow meters on the low-pressure sampling and pressure measuring air blowing pipeline and the high-pressure measuring air blowing pipeline, and closing a balance valve on the bypass after the readings of the two mass flow meters are stable, so that the differential pressure liquid level meter can measure the liquid level.
And the high-pressure measurement air blowing pipeline and the low-pressure measurement air blowing pipeline accurately control the nitrogen flow through a mass flowmeter, and the nitrogen flow value is 5-500 mL/min. Preferably, one end of the high-pressure measuring blowing pipeline and one end of the low-pressure measuring blowing pipeline close to the distillation tower are provided with temperature-adjustable electric heating wires, so that heavy materials in the tower are prevented from blocking the pipelines after entering the pressure measuring pipelines, and the temperature control range is 0-220 ℃.
In a preferred embodiment, the distillation tower liquid level measurement system is further provided with a tuning fork liquid level meter, and the differential pressure liquid level meter and the tuning fork liquid level meter are monitored mutually, so that relatively accurate liquid level measurement can be provided for the continuous distillation device, and reliable data can be provided for calculation of material balance. The upper part of the tuning fork liquid level meter is provided with the protective baffle, so that the phenomenon of false liquid level misinformation caused by hanging materials on the tuning fork liquid level meter after the materials enter the distillation tower can be eliminated. In the preferred embodiment, the tuning fork liquid level meter is obliquely arranged, the included angle between the tuning fork liquid level meter and the bottom of the distillation tower is 30-45 degrees, and hanging materials of the tuning fork liquid level meter can be reduced. In order to avoid the influence of high-temperature materials at the bottom of the distillation tower on the electric elements of the tuning fork liquid level meter, the temperature resistance range of the tuning fork liquid level meter is-70-400 ℃.
The structure and application method of the distillation tower liquid level measuring system provided by the utility model are further described with the attached drawings as follows:
FIG. 1 is a schematic structural diagram of a distillation column liquid level measuring system. As shown in fig. 1, the distillation column level measurement system includes:
the distillation tower consists of a tower body at the upper part and a tower kettle at the lower part. The tower body on be equipped with the low pressure and get the pressure mouth, low pressure measurement blowing pipeline and distillation column go up low pressure and get the pressure mouth intercommunication, low pressure measurement blowing pipeline on be equipped with ball valve 2, check valve 3 and mass flowmeter 4, wherein be equipped with temperature control equipment 1 on being close to the one end pipeline that the low pressure got the pressure mouth. The tower kettle is provided with a high-pressure taking port, a high-pressure measuring blowing pipeline is communicated with the high-pressure taking port on the tower kettle, the high-pressure measuring blowing pipeline is provided with a ball valve 13, a one-way valve 14 and a mass flowmeter 5, and a pipeline at one end close to the high-pressure taking port is provided with a temperature control device 12. The other ends of the high-pressure measuring blowing pipeline and the low-pressure measuring blowing pipeline are nitrogen inlets. A differential pressure liquid level meter 8 is connected between the high-pressure measuring blowing pipeline and the low-pressure measuring blowing pipeline, ball valves 6 and 9 are arranged on connecting pipelines of the differential pressure liquid level meter, the high-pressure measuring blowing pipeline and the low-pressure measuring blowing pipeline, the differential pressure liquid level meter is further provided with a bypass, and a balance valve 7 is arranged on the bypass.
The utility model provides a distillation column liquid level measurement system's application method, before the distillation plant feeding, for electric heating wire 1 on the low pressure measurement blowing pipeline and electric heating wire 12 on the high pressure measurement blowing pipeline set temperature be 150 ℃ -200 ℃, open ball valve 2 on the low pressure measurement blowing pipeline, and ball valve 13 on the high pressure measurement blowing pipeline, open the ball valve 6 that links to each other with differential pressure level gauge 8, 9, open balanced valve 7 on the bypass, check valve 3 on the low pressure measurement blowing pipeline and check valve 14 on the high pressure measurement blowing pipeline are normally closed state. The same flow value is set for the mass flowmeter 4 and the mass flowmeter 5, and when the readings of the two mass flowmeters are stable, the balance valve 7 is closed, and at the moment, the differential pressure liquid level meter can measure the liquid level. The protective baffle 10 eliminates the false liquid level misinformation phenomenon caused by hanging materials on the tuning fork liquid level meter 11 after the materials enter the distillation tower.
The structure and the application method of the distillation tower liquid level measuring system provided by the present invention are further illustrated by the following examples, but the present invention is not limited thereto.
Example 1
This embodiment illustrates the utility model provides a distillation column liquid level measurement system's application effect.
A distillation column and a liquid level measuring system as shown in FIG. 1 were used, wherein the distillation column consisted of an upper column body and a lower column bottom, wherein the column body had an inner diameter of 200mm and a height of about 1.5 m; the inner diameter of the tower bottom is 80mm, and the height is about 1 m. The tuning fork liquid level meter is arranged at the position 160mm below the bottom of the distillation tower body and forms an included angle of 45 degrees with the horizontal direction. The high-pressure taking port is positioned at the position 650mm below the bottom of the distillation tower body, and the low-pressure taking port is positioned at the position 1000mm above the bottom of the distillation tower body.
The pressure measurement method comprises the following steps:
before the distillation device is fed, a low-pressure-tapping nitrogen pipeline heating wire 1 and a high-pressure-tapping nitrogen pipeline heating wire 12 are set to proper temperatures, a ball valve 2 on a low-pressure blowing nitrogen pipeline and a ball valve 13 on a high-pressure blowing nitrogen pipeline are opened, ball valves 6 and 9 connected with a differential pressure liquid level meter 8 are opened, a balance valve 7 is opened, and a low-pressure-tapping one-way valve 3 and a high-pressure-tapping one-way valve 14 are in a normally closed state. The same flow value is set for the low-pressure-taking port mass flowmeter 4 and the high-pressure-taking port mass flowmeter 5, the balance valve 7 is closed after the readings of the two paths of mass flowmeters are stable, and the differential pressure liquid level meter can measure the liquid level at the moment.
According to the method, in the embodiment, when the heavy oil is fed by 2kg, the indication number of the differential pressure liquid level meter is increased from 0 liquid level, when the feeding amount reaches 5kg, the tuning fork liquid level meter is started, and the differential pressure liquid level meter displays that the liquid level height is 30 percent.
In the embodiment, the feeding material of the distillation device is oil refinery vacuum residue of Yanshan petrochemical company, China petrochemical industry, Inc., the distillation range is 406.5-721.2 ℃, and the basic properties are as follows:
| item | Data of | Item | Data of |
| Density (20 ℃ C.)/(g/cm)3) | 1.0343 | Wt% of carbon residue | 27.71 |
| Four components, wt% | Elemental analysis wt% | ||
| Saturation fraction | 26.4 | C | 86.24 |
| Aromatic component | 35.7 | H | 9.27 |
| Glue | 27.6 | S | 2.80 |
| Asphaltenes | 10.3 | N | 0.46 |
It is apparent from the embodiment that, the utility model provides a distillation column liquid level measurement system is applicable to heavy oil distillation plant's level measurement, and measuring method is simple and convenient, and measuring result is accurate.
Claims (10)
1. A distillation column level measurement system, comprising: the distillation tower comprises a distillation tower, a high-pressure measuring blowing pipeline communicated with a high-pressure taking port on the distillation tower, a low-pressure measuring blowing pipeline communicated with a low-pressure taking port on the distillation tower and a differential pressure liquid level meter; the high pressure measurement air blowing pipeline and the other end of the low pressure measurement air blowing pipeline are nitrogen inlets, the high pressure measurement air blowing pipeline and the low pressure measurement air blowing pipeline are connected with a differential pressure liquid level meter, the high pressure measurement air blowing pipeline and the low pressure measurement air blowing pipeline are respectively provided with a ball valve, a check valve and a mass flow meter, and one end of the high pressure measurement air blowing pipeline and one end of the low pressure measurement air blowing pipeline, which are close to the distillation tower, are provided with temperature control equipment.
2. The distillation column level measurement system of claim 1, further comprising a tuning fork level gauge positioned on said distillation column and a protective baffle positioned above the tuning fork side gauge.
3. The distillation column liquid level measuring system according to claim 2, wherein the tuning fork level gauge is installed in an inclined manner, and the included angle with the horizontal plane is 30 ° to 45 °.
4. The system for measuring the liquid level in a distillation column as claimed in claim 2, wherein the distillation column comprises an upper column body and a lower column bottom, wherein the column body has a height of 1m to 5m and an inner diameter of 100mm to 300mm, and the column bottom has a height of 0.8m to 1.2m and an inner diameter of 50mm to 100 mm.
5. The distillation column liquid level measuring system according to claim 4, wherein the tuning fork level gauge is disposed on the side wall of the column bottom at a distance of 50mm to 200mm from the bottom of the column body.
6. The distillation column level measuring system according to claim 2, wherein the tuning fork level gauge comprises a vibrating plate, a fork body, a mounting interface, a signal sensor and an electrical interface, which are connected in sequence, wherein the fork body has a length of 100mm to 150 mm.
7. The distillation column liquid level measuring system according to claim 4, wherein the high pressure tapping is positioned on the column bottom and is 500mm-900mm away from the bottom of the column body; the low-pressure taking port is positioned on the tower body of the distillation tower and is 800mm-1100mm away from the bottom of the tower body.
8. A distillation column level measuring system according to claim 4, wherein ball valves are provided on connection lines of the differential pressure level gauge and the high pressure measuring blowing line and the low pressure measuring blowing line, respectively, and a balance valve is provided on a bypass.
9. The distillation column liquid level measuring system according to claim 1 or 2, wherein the temperature control device is an electric heating wire with adjustable temperature, and the length of the pipeline of the electric heating wire is 400mm and 1000 mm.
10. A distillation column level measuring system according to claim 1 or 2, wherein the height of the distillation column body is 2m to 3 m; the inner diameter is 150mm-250 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021749243.2U CN213209191U (en) | 2020-08-20 | 2020-08-20 | Distillation column liquid level measurement system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021749243.2U CN213209191U (en) | 2020-08-20 | 2020-08-20 | Distillation column liquid level measurement system |
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| CN213209191U true CN213209191U (en) | 2021-05-14 |
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| CN202021749243.2U Active CN213209191U (en) | 2020-08-20 | 2020-08-20 | Distillation column liquid level measurement system |
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