CN212327443U - Liquid distribution test system in large-scale packed tower - Google Patents
Liquid distribution test system in large-scale packed tower Download PDFInfo
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- CN212327443U CN212327443U CN202020731647.2U CN202020731647U CN212327443U CN 212327443 U CN212327443 U CN 212327443U CN 202020731647 U CN202020731647 U CN 202020731647U CN 212327443 U CN212327443 U CN 212327443U
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Abstract
The utility model discloses a liquid distribution test system in large-scale filler tower, including filler test rectifying column, the bottom in the filler test rectifying column is equipped with the hydrops groove, hydrops groove top is provided with a plurality of check hydrops unit check for collecting the liquid that descends from the different cross-sections of filler, utilize nitrogen gas and organic liquid simulation rectifying column operating mode pressure and the descending liquid distribution condition under the gas-liquid load condition, select the organic liquid that has similar surface tension with liquid air, can better simulate the actual flow state of liquid air in the rectifying column, bottom hydrops groove upper portion is provided with a plurality of check hydrops unit, divide whole rectifying column cross-section into a plurality of square unit check, every square unit check below is connected with the hydrops pipe, be used for collecting the liquid that descends from the different positions of filler, and obtain the descending liquid flow rate of filler in different positions through the liquid level count, thereby obtaining the distribution characteristics of the descending liquid at different positions of the filler.
Description
Technical Field
The utility model relates to a liquid distribution test system, more specifically say a bit, relate to a liquid distribution test system in large-scale packing tower, belong to industry rectification field.
Background
At present, industrial rectification equipment is developing towards large-scale, therefore, the diameter of a rectification tower is continuously increased, the diameter of the rectification tower is known to reach the magnitude of 10m, but the bias flow severity of descending liquid in the tower is rapidly increased along with the increase of the diameter of the rectification tower, the current published data shows that most of rectification packing descending liquid distribution test devices adopt air and water to simulate a rectification two-phase medium, certain inconsistency exists between the occurrence of fluid viscosity, surface tension and the like and the actual rectification condition, in addition, the distribution of the descending liquid at the bottom of a packing of the rectification tower is basically observed by naked eyes at present, and the distribution condition of the descending liquid on the radial section of the packing cannot be accurately quantified.
SUMMERY OF THE UTILITY MODEL
In order to solve the prior art problem, the utility model provides a liquid distribution test system in large-scale packing tower with can utilize technical characterstic such as decline liquid distribution condition under nitrogen gas and organic liquid simulation rectifying column operating mode pressure and the gas-liquid load condition.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
the liquid distribution test system in the large-scale packed tower comprises a packed test rectifying tower, wherein a liquid accumulation groove is formed in the bottom of the packed test rectifying tower, and a plurality of square unit grids are arranged above the liquid accumulation groove and used for collecting liquid descending from different sections of a packing.
As an improvement, the gaps on the circumference of the inner wall of the packed test rectification column are removed, and 112 square unit cells are arranged in total.
As an improvement, square cell below is connected with the gas-liquid separation post, the gas-liquid separation post 7 is built-in to be filled with the gas-liquid separation filter screen and comes out in order to descend the gas separation in the liquid, gas-liquid separation post lower extreme is connected with the liquid collection post, be equipped with level sensor in the liquid collection post, level sensor is connected with PLC, and the liquid through gas-liquid separation filter screen gas-liquid separation falls into the liquid collection post.
As an improvement, the device also comprises a nitrogen pipe network with a stop valve a and an outlet pipeline with a blower, wherein a branch of the nitrogen pipe network converges with the outlet pipeline to realize convergence of the internal normal pressure nitrogen and the nitrogen, the converged nitrogen enters a hot end inlet of a nitrogen cooling heat exchanger, hot end outlets of the nitrogen cooling heat exchanger are respectively connected with an inlet of a stop valve b and an inlet of a stop valve c, an outlet of the stop valve b is connected with a gas inlet of a packing test rectifying tower, an outlet of the stop valve c is connected with a gas inlet of an organic liquid storage tank, a temperature sensor is connected between the inlet of the stop valve b and the inlet of the stop valve c, a pressure sensor is connected between the outlet of the stop valve b and the gas inlet of a packing test rectifying tower 1, and the temperature sensor a and the pressure sensor are both.
As an improvement, the bottom of the packing test rectifying tower is connected with an organic liquid outlet pipeline, the organic liquid outlet pipeline is respectively connected with a liquid pump inlet and a liquid stop valve outlet, the liquid stop valve inlet is connected with a liquid outlet of a liquid storage tank, the liquid pump outlet is respectively connected with a stop valve e inlet and a heat exchanger hot end inlet, the stop valve e outlet is connected with the liquid inlet of the liquid storage tank, the heat exchanger hot end outlet is connected with a stop valve f inlet, the stop valve f outlet is connected with a liquid inlet at the upper part of the packing test rectifying tower 1, a temperature sensor b is arranged between the heat exchanger hot end outlet and the stop valve inlet, and the temperature sensor b is connected with the PLC to transmit a temperature signal to the PLC for terminal display;
as an improvement, an exhaust stop valve inlet is connected to an exhaust port at the top of the packing test rectifying tower, an outlet of an exhaust stop valve 3 is connected with an inlet of a gas-liquid filter, an outlet of the gas-liquid filter is divided into two paths which are respectively an organic liquid outlet and a nitrogen outlet, the organic liquid outlet of the gas-liquid filter is connected with an inlet of a stop valve i, the outlet of the stop valve i is connected with an inlet of an organic liquid storage tank, the nitrogen outlet of the gas-liquid filter is respectively connected with an inlet of a stop valve j and an inlet of a stop valve k, and the outlet of the stop valve j is respectively.
As an improvement, the cold-end inlet of the nitrogen cooling heat exchanger and the cold-end inlet of the heat exchanger are connected with a chilled water outlet of the chilled water unit together, and the cold-end outlet of the nitrogen cooling heat exchanger and the cold-end outlet of the heat exchanger are connected with a chilled water return port of the chilled water unit together to form a circulating heat exchange pipeline.
As an improvement, the upper part and the lower part of the packing test rectifying tower are respectively connected with a pressure measurement port, the pressure measurement ports of the upper part and the lower part are respectively connected with a stop valve g inlet and a stop valve h inlet, the stop valve g outlet and the stop valve h outlet are jointly connected onto a differential pressure measuring instrument, and the differential pressure measuring instrument is connected with a PLC (programmable logic controller) so as to transmit a differential pressure signal output by the differential pressure measuring instrument to the PLC and display the differential pressure signal through a terminal.
As an improvement, the blower is electrically connected with the PLC to realize the control of the operation and the stop of the blower by sending digital switch signals through the PLC.
As an improvement, the upper part of the liquid storage tank is provided with a safety valve.
Has the advantages that: bottom hydrops groove upper portion is provided with a plurality of square cell, falls into a plurality of square cell with whole rectifying column cross-section, and every square cell below is connected with the hydrops pipe for collect from the liquid that packs different positions and descend, and obtain the descending liquid flow rate of packing in different positions through liquid level counting, thereby obtain the distribution characteristic of descending liquid at the different positions of packing.
Drawings
Fig. 1 is a schematic diagram of the testing system of the present invention.
FIG. 2 is a cross-sectional view taken at A-A of the present invention.
FIG. 3 is a cross-sectional view taken at B-B of the present invention.
FIG. 4 is a cross-sectional view taken at D-D of the present invention.
Detailed Description
The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following embodiments.
As shown in fig. 1-4, a specific embodiment of a liquid distribution test system in a large packed tower is shown, which includes a packed test rectifying tower 1, a liquid accumulation tank is arranged at the bottom inside the packed test rectifying tower 1, a plurality of liquid accumulation square grids 27 are arranged above the liquid accumulation tank for collecting liquid descending from different sections of the packing, a total of 112 square grids 27 are arranged by removing gaps on the circumference of the inner wall of the packed test rectifying tower 1, a gas-liquid separation column 7 is connected below the square grids 27, a gas-liquid separation filter screen 28 is filled in the gas-liquid separation column 7 for separating gas in descending liquid, a liquid collection column 6 is connected to the lower end of the gas-liquid separation column 7, a liquid level sensor is arranged in the liquid collection column 6, and the liquid level sensor is connected with a PLC29, liquid after gas-liquid separation of the gas-liquid separation filter screen 28 falls into the liquid collection column 6, the descending liquid load and descending liquid flow rate of different sections of the filler are obtained by measuring the liquid level change of the liquid collection column 6, the liquid level signal of the liquid level sensor is transmitted to the PLC29 to be displayed through a terminal, a plurality of square liquid accumulation units are arranged on the upper portion of the bottom liquid accumulation tank, the section of the whole rectifying tower is divided into a plurality of square cells, a liquid accumulation pipe is connected below each square cell and used for collecting liquid descending from different positions of the filler, the descending liquid flow rate of the filler at different positions is obtained through liquid level counting, and therefore the distribution characteristics of the descending liquid at different positions of the filler are obtained.
Also included is a nitrogen pipe network with shut-off valve a25 and an outlet line with blower 24, the branch of the nitrogen pipe network and the outlet pipeline converge to realize the convergence of the nitrogen and the nitrogen under the internal normal pressure, the converged nitrogen enters the hot end inlet of the nitrogen cooling heat exchanger 15, the hot end outlet of the nitrogen cooling heat exchanger 15 is respectively connected with the inlet of a stop valve b16 and the inlet of a stop valve c17, the outlet of the stop valve b16 is connected with the gas inlet of the packing test rectifying tower 1, the outlet of the stop valve c17 is connected with the gas inlet of the organic liquid storage tank 19, a temperature sensor 18 is connected between the inlet of the stop valve b16 and the inlet of the stop valve c17, a pressure sensor 31 is connected between the outlet of the stop valve b16 and the gas inlet of the packing test rectifying tower 1, the temperature sensor a18 and the pressure sensor 31 are both connected to the PLC29 so that temperature signals and pressure signals can be transmitted to the PLC29 to be displayed through a terminal;
the bottom of the packed test rectifying tower 1 is connected with an organic liquid outlet pipeline, the organic liquid outlet pipeline is respectively connected with an inlet of a liquid pump 8 and an outlet of a liquid stop valve 14, an inlet of the liquid stop valve 14 is connected with a liquid outlet of a liquid storage tank 19, an outlet of the liquid pump 8 is respectively connected with an inlet of a stop valve e13 and an inlet of a hot end of a heat exchanger 9, an outlet of the stop valve e13 is connected with the liquid inlet of the liquid storage tank 19, an outlet of the hot end of the heat exchanger 9 is connected with an inlet of a stop valve f11, an outlet of the stop valve f11 is connected with an inlet of liquid at the upper part of the packed test rectifying tower 1, a temperature sensor b10 is arranged between the outlet of the hot end of the heat exchanger 9 and the inlet of the stop valve f11, and the;
an air outlet at the top of the packing test rectifying tower 1 is connected with an inlet of an exhaust stop valve 3, an outlet of the exhaust stop valve 3 is connected with an inlet of a gas-liquid filter 26, an outlet of the gas-liquid filter 26 is divided into two paths which are respectively an organic liquid outlet and a nitrogen outlet, the organic liquid outlet of the gas-liquid filter 26 is connected with an inlet of a stop valve i21, an outlet of the stop valve i21 is connected with a liquid inlet of an organic liquid storage tank 19, a nitrogen outlet of the gas-liquid filter 26 is respectively connected with an inlet of a stop valve j22 and an inlet of a stop valve k23, and outlets of the stop valve j22 are respectively connected.
As an improvement, a cold-end inlet of the nitrogen cooling heat exchanger 15 and a cold-end inlet of the heat exchanger 9 are connected with a chilled water outlet of the chilled water unit 12, and a cold-end outlet of the nitrogen cooling heat exchanger 15 and a cold-end outlet of the heat exchanger 9 are connected with a chilled water return port of the chilled water unit 12 to form a circulating heat exchange pipeline.
As an improvement, the upper part and the lower part of the packing test rectifying tower 1 are respectively connected with a pressure measuring port, the pressure measuring ports of the upper part and the lower part are respectively connected with an inlet of a stop valve g2 and an inlet of a stop valve h4, an outlet of the stop valve g2 and an outlet of the stop valve h4 are jointly connected to the differential pressure measuring instrument 5, and the differential pressure measuring instrument 5 is connected with the PLC29 to realize that a differential pressure signal output by the differential pressure measuring instrument 5 is transmitted to the PLC29 to be displayed through a terminal.
As a modified embodiment, the blower 24 is electrically connected with the PLC29 to realize the control of the operation and the stop of the blower 24 through the digital switch signal sent by the PLC 29.
The operation method comprises the following steps:
1) before starting the test device, closing all valves, fully infiltrating the surface of the filler, slowly opening the liquid stop valve 14, enabling the organic liquid in the organic liquid storage tank 19 to enter the bottom of the filler test rectifying tower 1 and the inlet of the liquid pump 8, starting the liquid pump 8 and simultaneously opening the stop valve f11, enabling the organic liquid to enter the top of the filler test rectifying tower 1, spraying the organic liquid onto the surface of the filler from the top of the filler test rectifying tower 1, gradually descending to the bottom of the filler test rectifying tower 1, then conveying the organic liquid back to the top of the filler test rectifying tower 1 by the liquid pump 8, and circulating for 1.5-2 hours until the surface of the filler is fully infiltrated;
2) after the surface of the filler is fully soaked, starting a chilled water unit 12, cooling organic liquid at the outlet of a liquid pump 8 through a heat exchanger 9, slowly opening a stop valve a25 and a stop valve b16, and allowing nitrogen from a pipe network under normal pressure to enter the bottom of a filler test rectifying tower 1 after passing through a nitrogen cooling heat exchanger 15 to serve as ascending gas;
3) slowly opening an exhaust stop valve 3, enabling the gas at the top of the packing test rectifying tower 1 to enter a gas-liquid filter 26, separating liquid in the top exhaust gas, opening a stop valve i21, returning the liquid separated by the gas-liquid filter 26 to an organic liquid storage tank 19, dividing nitrogen at the outlet of the gas-liquid filter 26 into two paths, opening a stop valve j22 when the pressure of the gas-liquid filter 26 reaches a preset value, and directly converging the nitrogen in an outlet pipeline of an air blower 24 with the nitrogen in a nitrogen pipeline network; when the pressure of the gas-liquid filter 26 is not equal to the preset value, the stop valve k23 is opened, and the nitrogen is pressurized by the blower 24 and then converged with the nitrogen in the pipe network;
the temperature sensor b10 detects the temperature of liquid at the outlet of the liquid pump 8 to serve as the basis for adjusting the heat load of the heat exchanger 9, the heat load adjustment of the heat exchanger 9 is realized by changing the flow rate of chilled water of the chilled water unit 12, the pressure difference measuring instrument 5 measures the pressure difference between the top and the bottom of the packing test rectifying tower 1 to determine the resistance of the packing, the pressure sensor 31 measures the pressure of a nitrogen inlet at the bottom of the packing test rectifying tower 1 to determine the start and stop of the blower 24, and the temperature sensor 18 detects the temperature of nitrogen at the outlet of the hot end of the nitrogen cooling heat exchanger 15 to adjust the flow rate of the chilled water of the.
Finally, it should be noted that the present invention is not limited to the above embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (10)
1. A liquid distribution test system in a large-scale packed tower is characterized in that: the device comprises a packing test rectifying tower (1), wherein a liquid accumulation groove is formed in the bottom of the packing test rectifying tower (1), and a plurality of square unit grids (27) are arranged above the liquid accumulation groove and used for collecting liquid descending from different sections of packing.
2. The liquid distribution test system in the large packed tower according to claim 1, wherein: a total of 112 square cells (27) were arranged by removing the gaps on the circumference of the inner wall of the packed test rectification column (1).
3. The liquid distribution test system in the large packed tower according to claim 1 or 2, wherein: the square cell (27) below is connected with gas-liquid separation post (7), gas-liquid separation filter screen (28) in order to come out the gas separation in the descending liquid is filled in gas-liquid separation post (7), gas-liquid separation post (7) lower extreme is connected with liquid collection post (6), be equipped with level sensor in liquid collection post (6), level sensor is connected with PLC (29), and liquid through gas-liquid separation filter screen (28) gas-liquid separation falls into liquid collection post (6).
4. The liquid distribution test system in the large packed tower according to claim 3, wherein: the device is characterized by further comprising a nitrogen pipe network with a stop valve a (25) and an outlet pipeline with an air blower (24), wherein a branch of the nitrogen pipe network and the outlet pipeline are converged to realize convergence of internal normal pressure nitrogen and nitrogen, the converged nitrogen enters a hot end inlet of a nitrogen cooling heat exchanger (15), a hot end outlet of the nitrogen cooling heat exchanger (15) is respectively connected with an inlet of a stop valve b (16) and an inlet of a stop valve c (17), an outlet of the stop valve b (16) is connected with a gas inlet of a packing test rectifying tower (1), an outlet of the stop valve c (17) is connected with a gas inlet of an organic liquid storage tank (19), a temperature sensor a (18) is connected between the inlet of the stop valve b (16) and the inlet of the stop valve c (17), a pressure sensor (31) is connected between the outlet of the stop valve b (16) and the gas inlet of the packing test rectifying, The pressure sensors (31) are connected to the PLC (29) so that temperature signals and pressure signals can be transmitted to the PLC (29) and displayed through a terminal.
5. The liquid distribution test system in the large packed tower according to claim 4, wherein: the bottom of the packing test rectifying tower (1) is connected with an organic liquid outlet pipeline which is respectively connected with an inlet of a liquid pump (8) and an outlet of a liquid stop valve (14), the inlet of the liquid stop valve (14) is connected with the liquid outlet of the machine liquid storage tank (19), the outlet of the liquid pump (8) is respectively connected with an inlet of a stop valve e (13) and an inlet of the hot end of the heat exchanger (9), the outlet of the stop valve e (13) is connected with the liquid inlet of the machine liquid storage tank (19), the hot end outlet of the heat exchanger (9) is connected with the inlet of a stop valve f (11), the outlet of the stop valve f (11) is connected with the liquid inlet at the upper part of the packing test rectifying tower (1), a temperature sensor b (10) is arranged between the outlet of the hot end of the heat exchanger (9) and the inlet of the stop valve f (11), the temperature sensor b (10) is connected with the PLC (29) to transmit a temperature signal to the PLC (29) for displaying through a terminal.
6. The liquid distribution test system in the large packed tower according to claim 4 or 5, wherein: an exhaust stop valve (3) inlet is connected to an exhaust outlet at the top of the packing test rectifying tower (1), an outlet of the exhaust stop valve (3) is connected with an inlet of a gas-liquid filter (26), an outlet of the gas-liquid filter (26) is divided into two paths which are respectively an organic liquid outlet and a nitrogen outlet, the organic liquid outlet of the gas-liquid filter (26) is connected with an inlet of a stop valve i (21), an outlet of the stop valve i (21) is connected with a liquid inlet of an organic liquid storage tank (19), a nitrogen outlet of the gas-liquid filter (26) is respectively connected with an inlet of a stop valve j (22) and an inlet of a stop valve k (23), and an outlet of the stop valve j (22) is respectively connected to an outlet of an air blower (24), an.
7. The liquid distribution test system in the large packed tower according to claim 5, wherein: the cold end inlet of the nitrogen cooling heat exchanger (15) and the cold end inlet of the heat exchanger (9) are connected with a chilled water outlet of the chilled water unit (12) together, and the cold end outlet of the nitrogen cooling heat exchanger (15) and the cold end outlet of the heat exchanger (9) are connected with a chilled water return port of the chilled water unit (12) together to form a circulating heat exchange pipeline.
8. The liquid distribution test system in the large packed tower according to claim 5 or 7, wherein: the packing test rectifying column (1) upper portion and lower part are connected with the pressure measurement mouth respectively, and the pressure measurement mouth of upper portion and lower part is connected with stop valve g (2) import and stop valve h (4) import respectively, stop valve g (2) export and stop valve h (4) export are connected on differential pressure measuring apparatu (5) jointly, differential pressure measuring apparatu (5) are connected with PLC (29) and pass through the terminal demonstration in order to realize differential pressure signal transmission of differential pressure measuring apparatu (5) output to PLC (29).
9. The liquid distribution test system in the large packed tower according to claim 4, wherein: the blower (24) is electrically connected with the PLC (29) to realize the control of the operation and the stop of the blower (24) by sending digital quantity switching signals through the PLC (29).
10. The liquid distribution test system in the large packed tower according to claim 4, wherein: the upper part of the liquid storage tank (19) is provided with a safety valve.
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| CN202020731647.2U CN212327443U (en) | 2020-05-07 | 2020-05-07 | Liquid distribution test system in large-scale packed tower |
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| CN202020731647.2U CN212327443U (en) | 2020-05-07 | 2020-05-07 | Liquid distribution test system in large-scale packed tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111530113A (en) * | 2020-05-07 | 2020-08-14 | 杭州制氧机集团股份有限公司 | Liquid distribution test system in large-scale packed tower and operation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111530113A (en) * | 2020-05-07 | 2020-08-14 | 杭州制氧机集团股份有限公司 | Liquid distribution test system in large-scale packed tower and operation method |
| CN111530113B (en) * | 2020-05-07 | 2023-12-01 | 杭氧集团股份有限公司 | Liquid distribution test system in large-scale packed tower and operation method |
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Address after: 799 Xiangfu Road, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee after: Hang Yang Group Co.,Ltd. Address before: 310014 No. 799 Xiangfu Road, Qingshan Lake Street, Linan District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou oxygen generator group Co.,Ltd. |