Online purification skid-mounted treatment device for polluted triethylene glycol solution

By designing the online purification skid-mounted treatment device for contaminated triglycol solution, the combination of integrated base, distillation tower and reboiler is used to solve the problem that contaminated triglycol solution needs to be discarded, and the effect of online purification and reducing operating costs is achieved.

CN222540618UActive Publication Date: 2025-02-28HANCHEN ELITE MARINE ENG (JIANGSU) CO LTD
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Patent Information

Application Number
CN202420636030.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-29
Publication Date
2025-02-28
Estimated Expiration
2034-03-29

AI Technical Summary

Technical Problem

The contaminated triglycol solution needs to be discarded, resulting in increased operating costs and shutdowns when replacing triglycol solution, increasing raw material and labor costs.

Method used

A contaminated triglycol solution online purification skid-mounted treatment device is designed, including an integrated base, a distillation tower and a reboiler. The filtration, decolorization and dehydration of the triglycol solution is achieved through the combination of a particulate filter, an activated carbon filter and a distillation tower.

Benefits of technology

The online purification of triglycol solution is achieved, which avoids shutdowns, reduces operating costs, and extends the service life of triglycol solution.

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Abstract

The utility model discloses a polluted triethylene glycol solution on-line purification skid-mounted treatment device which comprises an integrated base, a rectifying tower and a reboiler, one side above the integrated base is connected with a particle filter element filter, one side of the particle filter element filter is connected with a feeding pipe, one side, far away from the feeding pipe, of the particle filter element filter is connected with a connecting pipe, and the other side of the particle filter element filter is connected with the rectifying tower. The end, away from the particle filter element filter, of the connecting pipe is connected with an activated carbon filter, the side, away from the connecting pipe, of the activated carbon filter is connected with a conveying pipe, the rectifying tower is connected to the end, away from the activated carbon filter, of the conveying pipe, the reboiler is connected to the bottom of the rectifying tower, and the bottom of the reboiler is connected with a discharging pipe. One end, far away from the reboiler, of the discharge pipe is connected with the delivery pump, and the top of the delivery pump is connected with the discharge pipe, so that the triethylene glycol solution can be purified on line in the running state of the natural gas dehydration equipment without shutdown, and the operation cost is reduced.
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Description

Technical Field

[0001] The utility model relates to the technical field of triethylene glycol solution purification, in particular to a skid-mounted treatment device for online purification of polluted triethylene glycol solution. Background Art

[0002] Offshore oil fields use triethylene glycol dehydration equipment to remove water from natural gas and lower the water dew point. During use, the triethylene glycol solution is contaminated and deteriorated due to factors such as high-temperature degradation of regeneration, improper operation of process parameters, and accumulation of salt ions in the water. As a result, the triethylene glycol solution foams severely and changes color and deteriorates during use, resulting in a decrease in the dehydration effect.

[0003] At present, in response to this phenomenon, the contaminated triethylene glycol solution is basically collected on site and discarded as waste, which increases the operating costs and causes downtime when the triethylene glycol solution is replaced, which increases the cost of raw materials and labor.

[0004] Therefore, in view of this, the existing structure and deficiencies are studied and improved, and an online purification skid-mounted treatment device for contaminated triethylene glycol solution is proposed, in order to achieve a more practical purpose. Summary of the invention

[0005] The purpose of the utility model is to provide a skid-mounted treatment device for online purification of contaminated triethylene glycol solution, so as to solve the problem mentioned in the above background that the contaminated triethylene glycol solution is discarded as waste, which will increase the operating cost and cause shutdown when replacing the triethylene glycol solution, which will increase the cost of raw materials and labor.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a skid-mounted treatment device for online purification of contaminated triethylene glycol solution, comprising an integrated base, a distillation tower and a reboiler, wherein a particle filter element filter is connected to one side of the upper side of the integrated base, and a feed pipe is connected to one side of the particle filter element filter, and a connecting pipe is connected to the side of the particle filter element filter away from the feed pipe, an activated carbon filter is connected to the end of the connecting pipe away from the particle filter element filter, and a transmission pipe is connected to the side of the activated carbon filter away from the connecting pipe, a solenoid valve is connected to the transmission pipe, and the distillation tower is connected to the end of the transmission pipe away from the activated carbon filter, the reboiler is connected to the bottom of the distillation tower, and a first discharge pipe is connected to the bottom of the reboiler, a delivery pump is connected to the end of the first discharge pipe away from the reboiler, and a second discharge pipe is connected to the top of the delivery pump.

[0007] Preferably, a vacuum compressor is provided on one side of the reboiler, an outlet pipe is connected to the top of the distillation tower, and one end of the outlet pipe away from the distillation tower is connected to the top of the vacuum compressor, and an exhaust port is provided on one side of the vacuum compressor.

[0008] Preferably, an air inlet pipe is connected to one side of the bottom of the distillation tower, and the air inlet pipe is connected to the top of the reboiler, a connecting baffle is provided at the connection between the distillation tower and the reboiler, and a downpipe is connected to the bottom of the connecting baffle, and the bottom end of the downpipe is connected to the reboiler.

[0009] Preferably, a plurality of groups of tower plates are arranged inside the distillation tower, and two groups of mutually symmetrical overflow weirs are arranged on the top of the tower plates, a plurality of groups of upper gas ports are arranged on the tower plates, and the plurality of groups of upper gas ports are arranged between the two groups of overflow weirs.

[0010] Preferably, a downcomer is connected to one side of the bottom of the tower plate, and a lower liquid port is provided in the downcomer, one side of the downcomer is connected to the side of the overflow weir away from the center of the tower plate, and the positions of two adjacent groups of downcomers at the bottom of the tower plate are symmetrical to each other.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the triethylene glycol solution is filtered, decolorized and partially dehydrated by the online processing skid-mounted equipment and then returned to the main process for reuse. The triethylene glycol solution can be purified online while the natural gas dehydration equipment is running, without stopping the operation, thus reducing the operating cost. The specific contents are as follows:

[0012] The integrated base is used to install and connect various purification treatment devices. The contaminated triethylene glycol solution is lifted from the triethylene glycol storage tank of the natural gas triethylene glycol system to the feed pipe by the lifting pump at normal temperature and pressure, and enters the particle filter element filter through the feed pipe, and the particles in the natural gas triethylene glycol liquid are removed in the particle filter element filter. After the liquid is filtered in the particle filter element filter, it enters the activated carbon filter through the connecting pipe to decolorize the solution. After the solution is de-particled and decolorized, the solution enters the transmission pipe, and the solenoid valve controls the transmission pipe to transport the solution to the distillation tower for dehydration treatment, and the solution enters the reboiler. The solution expands and vaporizes due to the heat in the reboiler, and its density becomes smaller, so it leaves the vaporization space and enters the distillation tower through the air inlet pipe, and smoothly returns to the distillation tower. The gas-liquid two phases in the distillation tower are returned, and the dehydrated solution is transported to the delivery pump through the discharge pipe, and the delivery pump transports the dehydrated solution through the discharge pipe to the storage of natural gas triethylene glycol. In the process of distillation, the gas in the distillation tower is extracted by the vacuum compressor through the air outlet pipe at the top of the distillation tower, and the gas is discharged from the exhaust port, so that the distillation tower forms a vacuum of vacuum flash evaporation. The operating pressure of the vacuum flash distillation tower is lower than the atmospheric pressure, and the boiling point of water at this time is lower than ℃. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the main body of the skid-mounted treatment device for online purification of polluted triethylene glycol solution of the utility model;

[0014] Figure 2It is a top view structural schematic diagram of the reboiler of the skid-mounted treatment device for online purification of contaminated triethylene glycol solution of the utility model;

[0015] Figure 3 It is a schematic structural diagram of the side section of the distillation tower of the skid-mounted treatment device for online purification of polluted triethylene glycol solution of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the side of the tower plate of the skid-mounted treatment device for online purification of polluted triethylene glycol solution of the utility model;

[0017] Figure 5 The utility model is a schematic diagram of the structure of a tower plate of a skid-mounted treatment device for online purification of contaminated triethylene glycol solution from above.

[0018] In the figure: 1. integrated base; 2. particle filter element filter; 21. feed pipe; 22. connecting pipe; 3. activated carbon filter; 31. transmission pipe; 311. solenoid valve; 4. distillation tower; 41. outlet pipe; 42. tower plate; 421. overflow weir; 422. downcomer; 423. lower liquid port; 424. upper gas port; 43. connecting baffle; 44. lower liquid pipe; 5. reboiler; 51. inlet pipe; 52. first outlet pipe; 6. delivery pump; 61. second outlet pipe; 7. vacuum compressor; 71. exhaust port. Implementation

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figures 1 to 5 The utility model provides a technical solution: a skid-mounted treatment device for online purification of contaminated triethylene glycol solution, comprising an integrated base 1, a distillation tower 4 and a reboiler 5, wherein a particle filter element filter 2 is connected to one side of the upper side of the integrated base 1, and a feed pipe 21 is connected to one side of the particle filter element filter 2, and a connecting pipe 22 is connected to a side of the particle filter element filter 2 away from the feed pipe 21, an activated carbon filter 3 is connected to one end of the connecting pipe 22 away from the particle filter element filter 2, and a transmission pipe 31 is connected to the side of the activated carbon filter 3 away from the connecting pipe 22, a solenoid valve 311 is connected to the transmission pipe 31, and the distillation tower 4 is connected to one end of the transmission pipe 31 away from the activated carbon filter 3, the reboiler 5 is connected to the bottom of the distillation tower 4, and a first discharge pipe 52 is connected to the bottom of the reboiler 5, a delivery pump 6 is connected to one end of the first discharge pipe 52 away from the reboiler 5, and a second discharge pipe 61 is connected to the top of the delivery pump 6.

[0021] The integrated base 1 is used to install and connect various purification treatment devices. The contaminated triethylene glycol solution is lifted by the lifting pump from the triethylene glycol storage tank of the natural gas triethylene glycol system to the feed pipe 21 at normal temperature and pressure, and enters the particle filter element filter 2 through the feed pipe 21, and the particles in the natural gas triethylene glycol liquid are removed in the particle filter element filter 2. After the liquid is filtered in the particle filter element filter 2, it enters the activated carbon filter 3 through the connecting pipe 22 to decolorize the solution. After the particles and decolorization of the solution, the solution enters the transmission pipe 31, and the solenoid valve 311 controls the transmission pipe 31 to transport the solution to the distillation tower 4 for dehydration treatment, and the solution enters the reboiler 5 to separate water from the solution. The dehydrated solution is transported to the delivery pump 6 through the first discharge pipe 52, and the delivery pump 6 transports the dehydrated solution to the storage of natural gas triethylene glycol through the second discharge pipe 61.

[0022] The distillation tower 4 is provided with multiple sets of trays 42, and two sets of mutually symmetrical overflow weirs 421 are provided on the top of the trays 42. Multiple sets of upper gas ports 424 are provided on the trays 42, and the multiple sets of upper gas ports 424 are provided between the two sets of overflow weirs 421. A downcomer 422 is connected to one side of the bottom of the tray 42, and a lower liquid port 423 is provided in the downcomer 422. One side of the downcomer 422 is connected to the side of the overflow weir 421 away from the center of the tray 42, and the downcomers 422 at the bottom of two adjacent trays 42 are located at the same position. Symmetrically, after the natural gas triethylene glycol liquid enters the distillation tower 4, the natural gas triethylene glycol liquid falls onto the tower plate 42, and enters the downcomer 422 through the overflow weir 421, and falls to the tower plate 42 of the next layer through the lower liquid port 423 on the downcomer 422, and the two sets of overflow weirs 421 are respectively located at the liquid outlet and the liquid, which are the outlet weir and the inlet weir, respectively, which can maintain the liquid layer on the plate and make the liquid overflow evenly, and the rising gas rises in sequence through the upper gas port 424 on each tower plate 42.

[0023] A vacuum compressor 7 is provided on one side of the reboiler 5, an outlet pipe 41 is connected to the top of the distillation tower 4, and one end of the outlet pipe 41 away from the distillation tower 4 is connected to the top of the vacuum compressor 7, and an exhaust port 71 is provided on one side of the vacuum compressor 7, an inlet pipe 51 is connected to the bottom side of the distillation tower 4, and the inlet pipe 51 is connected to the top of the reboiler 5, a connecting baffle 43 is provided at the connection between the distillation tower 4 and the reboiler 5, and a downpipe 44 is connected to the bottom of the connecting baffle 43, and the bottom end of the downpipe 44 is connected to the reboiler 5, and the solution falls to the connecting baffle 43. And enter the reboiler 5 through the downcomer 44, the gas in the distillation tower 4 is extracted by the vacuum compressor 7 through the outlet pipe 41 at the top of the distillation tower 4, and the gas is discharged from the exhaust port 71, so that the distillation tower 4 forms a vacuum of vacuum flash. The operating pressure of the vacuum flash distillation tower is lower than the atmospheric pressure. At this time, the boiling point of water is lower than 100°C. The solution expands and vaporizes due to the heat in the reboiler 5, and the density becomes smaller, so that it leaves the vaporization space, enters the distillation tower 4 through the inlet pipe 51, and smoothly returns to the distillation tower 4, returning to the gas-liquid two phases in the distillation tower 4, and the gas phase passes upward through the tower plate 42.

[0024] Working principle: When using a variable frequency heating water boiler, first install each purification treatment device on the integrated base 1, and the contaminated triethylene glycol solution is lifted by the lifting pump from the triethylene glycol storage tank of the natural gas triethylene glycol system to the feed pipe 21 at normal temperature and pressure, and enters the particle filter 2 through the feed pipe 21, and the particles in the natural gas triethylene glycol liquid are removed in the particle filter 2. After the liquid is filtered in the particle filter 2, it enters the activated carbon filter 3 through the connecting pipe 22 to decolorize the solution. After the particles are removed and the solution is decolorized, the solution enters the transmission pipe 31, and the solenoid valve 311 controls the transmission pipe 31 to transport the solution to the distillation tower 4 for dehydration treatment.

[0025] After the natural gas triethylene glycol liquid enters the distillation tower 4, the natural gas triethylene glycol liquid falls onto the tower plate 42, and enters the downcomer 422 through the overflow weir 421, and falls to the tower plate 42 of the next layer through the lower liquid port 423 on the downcomer 422. The two sets of overflow weirs 421 are respectively located at the outlet of the liquid and at the liquid, which are the outlet weir and the inlet weir, respectively, and can maintain the liquid layer on the plate and make the liquid overflow evenly, and the solution falls to the connecting baffle 43 at the bottom, and enters the reboiler 5 through the lower liquid pipe 44.

[0026] The solution is heated, expanded, and vaporized in the reboiler 5, and its density decreases, so that it leaves the vaporization space and enters the distillation tower 4 through the air inlet pipe 51, and smoothly returns to the distillation tower 4, returning to the gas-liquid two-phase in the distillation tower 4. The gas phase passes upward through the tower plate 42, and the rising gas rises in sequence through the upper gas ports 424 on each tower plate 42. At the same time, the vacuum compressor 7 extracts the gas in the distillation tower 4 through the air outlet pipe 41 at the top of the distillation tower 4, and discharges the gas from the exhaust port 71, so that the distillation tower 4 forms a vacuum of vacuum flash. The operating pressure of the vacuum flash distillation tower is lower than the atmospheric pressure. At this time, the boiling point of water is lower than 100°C, and the dehydrated solution is transported to the delivery pump 6 through the first discharge pipe 52, and the delivery pump 6 transports the dehydrated solution to the storage of natural gas triethylene glycol through the second discharge pipe 61.

Claims

1. A skid-mounted treatment device for online purification of a contaminated triethylene glycol solution, comprising an integrated base (1), a distillation tower (4) and a reboiler (5), characterized in that: A particle filter cartridge filter (2) is connected to one side of the upper portion of the integrated base (1), and a feed pipe (21) is connected to one side of the particle filter cartridge filter (2), and a connecting pipe (22) is connected to a side of the particle filter cartridge filter (2) away from the feed pipe (21), and an activated carbon filter (3) is connected to one end of the connecting pipe (22) away from the particle filter cartridge filter (2), and a transmission pipe (31) is connected to the side of the activated carbon filter (3) away from the connecting pipe (22), and a solenoid valve (311) is connected to the transmission pipe (31), and the distillation tower (4) is connected to one end of the transmission pipe (31) away from the activated carbon filter (3), and the reboiler (5) is connected to the bottom of the distillation tower (4), and a first discharge pipe (52) is connected to the bottom of the reboiler (5), and a delivery pump (6) is connected to one end of the first discharge pipe (52) away from the reboiler (5), and a second discharge pipe (61) is connected to the top of the delivery pump (6).

2. The skid-mounted treatment device for online purification of contaminated triethylene glycol solution according to claim 1 is characterized by: A vacuum compressor (7) is provided on one side of the reboiler (5), a gas outlet pipe (41) is connected to the top of the distillation tower (4), and an end of the gas outlet pipe (41) away from the distillation tower (4) is connected to the top of the vacuum compressor (7), and an exhaust port (71) is provided on one side of the vacuum compressor (7).

3. The skid-mounted treatment device for online purification of contaminated triethylene glycol solution according to claim 2 is characterized by: An air inlet pipe (51) is connected to one side of the bottom of the distillation tower (4), and the air inlet pipe (51) is connected to the top of the reboiler (5). A connecting baffle (43) is provided at the connection between the distillation tower (4) and the reboiler (5), and a liquid down pipe (44) is connected to the bottom of the connecting baffle (43), and the bottom end of the liquid down pipe (44) is connected to the inside of the reboiler (5).

4. The skid-mounted treatment device for online purification of contaminated triethylene glycol solution according to claim 2 is characterized in that: The distillation tower (4) is provided with a plurality of tower plates (42) inside, and two sets of mutually symmetrical overflow weirs (421) are provided on the top of the tower plates (42). The tower plates (42) are provided with a plurality of upper gas ports (424), and the plurality of upper gas ports (424) are provided between the two sets of overflow weirs (421).

5. The skid-mounted treatment device for online purification of contaminated triethylene glycol solution according to claim 4 is characterized in that: A downcomer (422) is connected to one side of the bottom of the tower plate (42), and a downcomer (422) is provided inside the downcomer (422). One side of the downcomer (422) is connected to a side of the overflow weir (421) away from the center of the tower plate (42), and the positions of the downcomers (422) at the bottoms of two adjacent tower plates (42) are symmetrical to each other.