Filtering device for triethylene glycol pregnant solution

Abstract

The utility model relates to the field of triethylene glycol cyclic regeneration, in particular to a filtering device for triethylene glycol rich liquor, which comprises a first cavity and a second cavity, the first cavity is connected with the second cavity, the first cavity is provided with a filtering cavity, the second cavity is provided with a liquid collecting cavity, and the first cavity is provided with an ultrafiltration membrane assembly. The ultrafiltration membrane component divides the filtering cavity into a pre-filtering cavity and a post-filtering cavity, the pre-filtering cavity is positioned on the top side of the ultrafiltration membrane component, the post-filtering cavity is positioned on the bottom side of the ultrafiltration membrane component, and the liquid collecting cavity is communicated with the post-filtering cavity; the first cavity is provided with a liquid inlet pipeline communicated with the pre-filtering cavity, and the liquid inlet pipeline is provided with a liquid inlet valve; the second cavity is provided with a liquid discharging pipeline communicated with the liquid collecting cavity, and a liquid discharging valve is arranged on the liquid discharging pipeline; the first cavity is provided with a maintenance opening communicated with the filtering cavity, and the maintenance opening is covered with a cover plate; the triethylene glycol pregnant solution is filtered through the ultrafiltration membrane assembly, so that the filtered triethylene glycol pregnant solution does not contain condensate oil and solid impurities, and downstream equipment and pipelines are prevented from being blocked.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of triethylene glycol recycling, particularly relates to a filter device for triethylene glycol rich solution. BACKGROUND

[0002] In the process of exploiting natural gas, gas well needs to be dehydrated in the station, and triethylene glycol is used to dehydrate natural gas at present, so that the natural gas dew point reaches the requirement of external transmission, and then the natural gas is pressurized and externally transmitted; the triethylene glycol used in the field is recycled to realize reuse; the recycling steps of triethylene glycol are as follows: buffer tank (poor liquid)→plate heat exchanger→plunger pump→absorption tower→rich liquid after exchanging with natural gas→rectifying column→flash tank→granular filter→activated carbon filter→granular filter→plate heat exchanger→heat exchange through the coil into the buffer tank→rectifying column→reboiler→buffer tank (poor liquid); since the triethylene glycol rich solution contains condensate oil and other solid impurities, when various impurities flow in the pipeline along with the rich solution, the equipment and pipeline are prone to be blocked, so that the triethylene glycol liquid circulation is not smooth, thereby leading to a great reduction of dehydration efficiency. The current maintenance method is as follows: after stopping the triethylene glycol dehydration regeneration system, the equipment pipeline is cleaned, the filter elements in the granular filter and activated carbon filter are replaced, and new triethylene glycol is used when necessary; the equipment maintenance cycle is long, and the high price of triethylene glycol leads to high production cost. SUMMARY

[0003] The utility model aims at overcoming the deficiency that the equipment and pipeline of the triethylene glycol recycling system are prone to be blocked in the prior art, and provides a filter device for triethylene glycol rich solution.

[0004] The utility model provides a filter device for triethylene glycol rich solution, which comprises

[0005] The first cavity and the second cavity are connected, the first cavity is provided with a filter cavity, the second cavity is provided with a liquid collecting cavity, the first cavity is provided with an ultrafiltration membrane assembly, the ultrafiltration membrane assembly separates the filter cavity into a pre-filtering cavity and a post-filtering cavity, the pre-filtering cavity is located on the top side of the ultrafiltration membrane assembly, the post-filtering cavity is located on the bottom side of the ultrafiltration membrane assembly, and the liquid collecting cavity is communicated with the post-filtering cavity;

[0006] The first cavity is provided with a liquid inlet pipeline communicated with the pre-filtering cavity, and a liquid inlet valve is arranged on the liquid inlet pipeline; the second cavity is provided with a liquid outlet pipeline communicated with the liquid collecting cavity, and a liquid outlet valve is arranged on the liquid outlet pipeline;

[0007] The first cavity is provided with a maintenance opening communicated with the filter cavity, and a cover plate is arranged on the maintenance opening cover.

[0008] The utility model discloses a filter device for triethylene glycol rich liquid, the ultrafiltration membrane assembly in the filter cavity can remove the condensate oil and solid impurities in triethylene glycol rich liquid, guarantee the triethylene glycol rich liquid discharged in the liquid collection cavity does not contain condensate oil and solid impurities, thereby avoiding the impurity blockage equipment and pipeline, in the vertical direction, the first cavity is located at the top of the second cavity, makes triethylene glycol rich liquid can enter the ultrafiltration membrane assembly and filter under the action of gravity, and the triethylene glycol rich liquid after filtering is collected through the liquid collection cavity and is discharged from the liquid discharge pipeline, is provided with the maintenance mouth in the first cavity, when the ultrafiltration membrane assembly needs maintenance, can make the first cavity isolate through the closing liquid discharge valve and liquid inlet valve, and the operating personnel maintain the ultrafiltration membrane assembly through the maintenance mouth.

[0009] The ultrafiltration membrane is a filter membrane for an ultrafiltration process, and is a high polymer semi-permeable membrane capable of separating high polymer colloids or suspended particles of a certain size from a solution; the ultrafiltration membrane is driven by pressure, has a pore size of 1-100 nm, and belongs to an asymmetric membrane type; the pore density is about 10 / cm, and the operating pressure difference is 100-1000 kPa; the ultrafiltration membrane is suitable for removing colloidal particles and macromolecules, and can separate a solution with a concentration of less than 10%; the high polymer polymer membrane has an asymmetric pore structure, and is divided into two layers: the upper layer is a functional layer, has dense micropores and the function of intercepting macromolecules, and has a pore size of 1-20 nm; the lower layer is a support layer with a large-pore structure, and has the function of increasing the strength of the membrane; the functional layer is thin, and has a large water flux; the ultrafiltration process of the ultrafiltration membrane is essentially a mechanical screening process, and the size of the pores on the surface of the membrane is the most important control factor; the solute that can be separated by the ultrafiltration membrane is a molecule with a size of 1-30 nm, and the substances rejected by the ultrafiltration membrane are related to the shape, size, flexibility of the molecules, and operating conditions, etc. In addition to the characteristics of the membrane. The ultrafiltration membrane is generally made into various types of assemblies, such as a tubular type, a plate type, a roll type, and a capillary type, and is applied by assembling multiple assemblies together to increase the filtration area.

[0010] Preferably, a cutoff valve is arranged between the first cavity and the second cavity.

[0011] By closing the cutoff valve, the filter cavity is isolated from the liquid collection cavity, so that dirt does not fall into the liquid collection cavity when the operating personnel maintain the ultrafiltration membrane assembly; when the ultrafiltration membrane assembly filters the triethylene glycol rich liquid, dirt adheres to the filter cavity where the ultrafiltration membrane assembly is arranged, and the liquid collection cavity remains relatively clean; by closing the cutoff valve, dirt after cleaning of the ultrafiltration membrane assembly does not fall into the liquid collection cavity, so that the liquid collection cavity is not cleaned, the cleaning time is reduced, the cleaning efficiency is improved, and the cleanliness of the triethylene glycol rich liquid discharged from the filter device after maintenance is ensured.

[0012] Preferably, the first cavity is provided with a blowdown pipe and a steam pipe, the blowdown pipe is communicated with the post-filtering cavity, and the blowdown pipe is provided with a blowdown valve; the steam pipe is communicated with the pre-filtering cavity, and the steam pipe is provided with a steam valve.

[0013] By setting the steam pipe and the blowdown pipe, when the ultrafiltration membrane assembly needs to be cleaned, the ultrafiltration membrane assembly is dredged by closing the shut-off valve, introducing high-temperature steam into the filtering cavity, and opening the blowdown valve, so that the condensed oil is liquefied and discharged from the blowdown pipe when the high-temperature steam passes through the ultrafiltration membrane assembly; before the high-temperature steam is introduced, the triethylene glycol rich liquid is recovered through the liquid inlet pipe.

[0014] Preferably, the first cavity is provided with a pressure relief valve, and the pressure relief valve is communicated with the filtering cavity.

[0015] By setting the pressure relief valve, overpressure work in the filtering cavity is avoided, and safety is ensured.

[0016] Preferably, the maintenance opening is arranged at the top of the first cavity, and the maintenance opening is communicated with the pre-filtering cavity.

[0017] Preventing the triethylene glycol rich liquid from leaking from the maintenance opening.

[0018] Preferably, the cover plate is an arched cover, and the pressure relief valve is arranged on the cover.

[0019] The arched cover is more convenient for setting the pressure relief valve, the pressure relief valve is arranged at the highest position of the arched cover, so as to avoid that the triethylene glycol rich liquid blocks the pressure relief valve; the pressure relief valve can be disassembled with the cover plate, so as to be convenient for the operator to maintain and check the pressure relief valve.

[0020] Preferably, the bottom of the liquid collecting cavity is funnel-shaped, the liquid outlet pipe is communicated with the lowest position of the funnel-shaped bottom, and the top of the liquid collecting cavity is arc-shaped.

[0021] The funnel-shaped cavity bottom is convenient for the filtered triethylene glycol rich liquid to gather at the bottom of the liquid collecting cavity; the arc-shaped cavity top makes the liquid drops gathered at the top of the liquid collecting cavity slide down along the cavity wall under the action of gravity.

[0022] Preferably, the ultrafiltration membrane assembly comprises a filter plate and a plurality of cylindrical filter cores, the shape of the filter plate is matched with the shape of the filtering cavity, the cylindrical filter cores are arranged in the filter plate in a nested mode, and the filter plate is connected with the first cavity.

[0023] A plurality of cylindrical filter cores are adopted to increase the filtering area and the filtering efficiency of the triethylene glycol rich liquid; the filter plate is used to fix the cylindrical filter cores at a certain position in the filtering cavity, the filter plate divides the filtering cavity into the pre-filtering cavity and the post-filtering cavity, and the triethylene glycol rich liquid is ensured to pass through the cylindrical filter cores for filtering.

[0024] Preferably, a plurality of through mounting holes are formed on the filter plate, and the cylindrical filter core is nested in the mounting holes, and the side wall of the cylindrical filter core is a mesh structure.

[0025] The plurality of mounting holes are uniformly arranged on the filter plate, so that the cylindrical filter cores are uniformly distributed on the filter plate, and the side wall of the cylindrical filter core is mesh-shaped, so that the triethylene glycol rich liquid can pass through the mesh-shaped side wall and enter the cylindrical filter core for filtration.

[0026] Preferably, a support seat is arranged at the bottom of the second cavity, and the support seat is used for abutting against the ground.

[0027] By arranging the support seat, the filtration device for the triethylene glycol rich liquid can be stably fixed on the ground.

[0028] Compared with the prior art, the filtration device for the triethylene glycol rich liquid has the following beneficial effects:

[0029] 1. The filtration device for the triethylene glycol rich liquid, the ultrafiltration membrane assembly in the filtration cavity can remove the condensate oil and solid impurities in the triethylene glycol rich liquid, so that the triethylene glycol rich liquid discharged from the liquid collecting cavity does not contain condensate oil and solid impurities, thereby avoiding the blockage of the equipment and pipelines by impurities; in the vertical direction, the first cavity is located at the top of the second cavity, so that the triethylene glycol rich liquid can enter the ultrafiltration membrane assembly for filtration under the action of gravity, and the filtered triethylene glycol rich liquid is collected through the liquid collecting cavity and discharged from the liquid discharge pipeline; the maintenance opening is arranged in the first cavity, and when the ultrafiltration membrane assembly needs to be maintained, the first cavity can be isolated by closing the liquid discharge valve and the liquid inlet valve, so that the operating personnel can maintain the ultrafiltration membrane assembly through the maintenance opening.

[0030] 2. The filtration device for the triethylene glycol rich liquid has the advantages of simple structure, easy manufacturing, convenient maintenance, filtration of the triethylene glycol rich liquid through the ultrafiltration membrane assembly, no condensate oil and solid impurities in the filtered triethylene glycol rich liquid, avoidance of blockage of downstream equipment and pipelines, reduction of equipment maintenance time, improvement of dehydration efficiency, good economic value and practical value. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 FIG. 1 is a structural schematic view of a filtration device for a triethylene glycol rich liquid according to an embodiment of the present application;

[0032] Figure 2 FIG. 2 is a structural schematic view of a filtration device for a triethylene glycol rich liquid according to another embodiment of the present application.

[0033] Markings in the drawing:

[0034] 1-first cavity, 2-second cavity, 3-filtering cavity, 31-pre-filtering cavity, 32-post-filtering cavity, 4-liquid collecting cavity, 5-liquid inlet pipeline, 6-liquid outlet pipeline, 7-liquid inlet valve, 8-liquid outlet valve, 9-maintenance port, 10-cover plate, 11-shutoff valve, 12-steam pipeline, 13-drainage pipeline, 14-steam valve, 15-drainage valve, 16-pressure relief valve, 17-ultrafiltration membrane assembly, 171-filtering plate, 172-cylindrical filter core, 18-supporting seat. DETAILED DESCRIPTION

[0035] The utility model will be described in further detail below in combination with specific embodiments. However, this should not be understood as the scope of the above-mentioned subject matter of the utility model being limited to the following embodiments. Any technology realized based on the content of the utility model falls within the scope of the utility model.

[0036] In the description of the embodiments of the utility model, the terms indicating the orientation or position relationship of "up", "down", "left", "right", "center", "inner", "outer", etc. are expressed based on the orientation or position relationship shown in the drawings or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only used to facilitate the description of the scheme of the utility model or simplify the description in the embodiments to facilitate the quick understanding of the scheme by the technicians and should not be understood as indicating or implying that the specific device / component / element must have a specific orientation or be constructed and operated in a specific position relationship, so it should not be understood as a limitation on the utility model.

[0037] In addition, the terms "horizontal", "vertical", "suspension", "parallel", etc. do not mean that the corresponding device / component / element must be absolutely horizontal or vertical or suspended or parallel. For example, "horizontal" only means that its direction is more horizontal relative to "vertical" and does not mean that the structure must be completely horizontal but can be slightly inclined. Alternatively, it can be simply understood that the corresponding device / component / element is arranged in the direction of "horizontal", "vertical", "suspension", "parallel", etc. and can have an error / offset of ±10% relative to the corresponding direction, more preferably an error / offset of ±8%, more preferably an error / offset of ±6%, more preferably an error / offset of ±5%, and more preferably an error / offset of ±4%. As long as the corresponding device / component / element is within the error / offset range, it can still achieve its role in the scheme of the utility model.

[0038] In addition, the terms "first", "second", "third", etc. are only used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of the specific components.

[0039] Further, in the description of the embodiments of the utility model,'several' 'a plurality of''several' represents at least 2. It can be 2, 3, 4, 5, 6, 7, 8, 9 etc. Any situation, it can even be more than 9 cases.

[0040] Further, in the description of the technical scheme of the utility model, unless otherwise explicitly specified / limited / limited, the term'set' 'installation' 'connected' 'connected' 'provided with' 'laid' 'arranged' should be understood broadly, for example, it can be fixedly connected, it can also be detachably connected, or integrally connected, it can be welding, riveting, bolting, screw connection and other commonly used connection means in the art. The connection can be mechanical connection, electrical connection or communication connection, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements.

[0041] Embodiment 1

[0042] As shown in Figure 1 A filter device for triethylene glycol rich liquid, comprising

[0043] The first cavity 1 and the second cavity 2, the first cavity 1 is connected with the second cavity 2, the first cavity 1 is provided with filter cavity 3, the second cavity 2 is provided with liquid collecting cavity 4, the first cavity 1 is provided with ultrafiltration membrane assembly 17, the ultrafiltration membrane assembly 17 divides the filter cavity 3 into filter front cavity 31 and filter rear cavity 32, the filter front cavity 31 is located at the top side of the ultrafiltration membrane assembly 17, the filter rear cavity 32 is located at the bottom side of the ultrafiltration membrane assembly 17, the liquid collecting cavity 4 is communicated with the filter rear cavity 32;

[0044] The first cavity 1 is provided with liquid inlet pipeline 5 communicated with the filter front cavity 31, the liquid inlet pipeline 5 is provided with liquid inlet valve 7;The second cavity 2 is provided with liquid outlet pipeline 6 communicated with the liquid collecting cavity 4, the liquid outlet pipeline 6 is provided with liquid outlet valve 8;

[0045] The first cavity 1 is provided with maintenance opening 9 communicated with the filter cavity 3, the maintenance opening 9 cover is provided with cover plate 10.

[0046] The utility model discloses a filter device for triethylene glycol rich liquid, the ultrafiltration membrane assembly 17 in filter cavity 3 can remove the condensate oil and solid impurities in triethylene glycol rich liquid, guarantee the triethylene glycol rich liquid discharged in the liquid collection cavity 4 does not contain condensate oil and solid impurities, thereby avoiding the impurity blockage equipment and pipeline, in vertical direction, first cavity 1 is located at the top of second cavity 2, makes triethylene glycol rich liquid can enter the ultrafiltration membrane assembly 17 and filter under the action of gravity, and the triethylene glycol rich liquid after filtering is collected through the liquid collection cavity 4 and is discharged from the liquid discharge pipeline 6, is provided with maintenance mouth 9 in first cavity 1, when needing maintenance to the ultrafiltration membrane assembly 17, can pass through the first cavity 1 is isolated by closing liquid discharge valve 8 and liquid inlet valve 7, makes the operating personnel maintain the ultrafiltration membrane assembly 17 through maintenance mouth 9.

[0047] In one or more embodiments, a cutoff valve 11 is provided between the first cavity 1 and the second cavity 2, and the first cavity 1 and the second cavity 2 are connected through the cutoff valve 11; when the cutoff valve 11 is opened, the filtered cavity 32 and the liquid collection cavity 4 are communicated through the cutoff valve 11; when the cutoff valve 11 is closed, the filter cavity 3 is isolated from the liquid collection cavity 4, which prevents dirt from falling into the liquid collection cavity 4 during maintenance of the ultrafiltration membrane assembly 17; when the ultrafiltration membrane assembly 17 filters the triethylene glycol rich liquid, dirt adheres to the filter cavity 3 where the ultrafiltration membrane assembly 17 is arranged, and the liquid collection cavity 4 remains relatively clean. By closing the cutoff valve 11, it can be avoided that the dirt after cleaning of the ultrafiltration membrane assembly 17 falls into the liquid collection cavity 4 and contaminates the liquid collection cavity 4, which avoids cleaning of the liquid collection cavity 4, reduces the cleaning time, improves the cleaning efficiency, and ensures the cleanliness of the triethylene glycol rich liquid discharged by the filter device after maintenance.

[0048] In an optional embodiment, the first cavity 1 is provided with a blowdown pipeline 13 and a steam pipeline 12, the blowdown pipeline 13 is communicated with the filtered cavity 32, and the steam pipeline 12 is communicated with the pre-filtering cavity 31, so that the blowdown pipeline 13 and the steam pipeline 12 are respectively located on both sides of the ultrafiltration membrane assembly 17. When it is necessary to dredge the ultrafiltration membrane, the cutoff valve 11 is closed, the blowdown valve 15 is opened, and steam is introduced into the filter cavity 3 through the steam pipeline 12, so that the steam passes through the filter membrane when flowing in the filter cavity 3, the condensate oil is liquefied by the high temperature of the steam, and the condensate oil is discharged from the blowdown pipeline 13 at the bottom of the filter cavity 3; the blowdown valve 15 is arranged in the blowdown pipeline 13, so that the operating personnel can control the blowdown time, and the steam valve 14 is arranged in the steam pipeline 12, so that the operating personnel can control the time when the steam is introduced into the filter cavity 3.

[0049] In one or more embodiments, the first cavity 1 is provided with a pressure relief valve 16, and the pressure relief valve 16 is communicated with the filter cavity 3; by arranging the pressure relief valve 16, it can be avoided that the ultrafiltration membrane assembly 17 works under overpressure when it is blocked, and the safety of the operating equipment and the operating personnel is ensured.

[0050] In an optional embodiment, the maintenance opening 9 is arranged at the top of the first cavity 1, the maintenance opening 9 is in communication with the pre-filter cavity 31, the cover plate 10 is an arc-shaped cover, the pressure relief valve 16 is arranged at the highest position of the arc-shaped cover; as the cover plate 10 is disassembled, the pressure relief valve 16 will be disassembled from the first cavity 1, which is convenient for the operator to maintain and check the pressure relief valve 16, and ensures the safety of the equipment operation; the arc-shaped cover plate 10 can avoid the contact between the pressure relief valve 16 and the triethylene glycol rich liquid, and avoid the blockage of the pressure relief valve 16.

[0051] In an optional embodiment, the cover is hinged to the first cavity 1.

[0052] In one or more embodiments, the bottom of the liquid collecting cavity 4 is funnel-shaped, and the liquid discharge pipeline 6 is in communication with the lowest position of the funnel-shaped bottom; the funnel-shaped bottom of the liquid collecting cavity 4 can make the liquid more easily gather at the lowest position of the bottom, and the lowest position of the bottom is communicated through the liquid discharge pipeline 6, which is convenient for discharging the filtered triethylene glycol rich liquid.

[0053] In an optional embodiment, the top of the liquid collecting cavity 4 is arc-shaped; the liquid drops gathered at the top of the liquid collecting cavity 4 can slide down along the cavity wall under the action of gravity, avoiding the triethylene glycol rich liquid drops hanging at the top of the liquid collecting cavity 4.

[0054] In one or more embodiments, the ultrafiltration membrane assembly 17 is composed of a filter plate 171 and a plurality of cylindrical filter cores 172, the shape of the filter plate 171 is adapted to the shape of the filter cavity 3, and the filter cavity 3 can be divided into a pre-filter cavity 31 at the upper part and a post-filter cavity 32 at the lower part after the filter plate 171 is arranged in the filter cavity 3, the steam pipeline 12 and the liquid inlet pipeline 5 are both in communication with the pre-filter cavity 31, the post-filter cavity 32 is in communication with the shut-off valve 11, a plurality of through holes are arranged on the filter plate 171 as mounting holes, the cylindrical filter cores 172 can be embedded in the through holes, in order to ensure the filtering effect, the cylindrical filter cores 172 and the through holes need to be sealed, the filter plate 171 is connected with the first cavity 1 to fix the filter plate 171; the side wall of the cylindrical filter core 172 is a mesh structure, and the triethylene glycol rich liquid can pass through the mesh structure to enter the cylindrical filter core 172 for filtering; the filter plate 171 is welded and fixed with the first cavity 1.

[0055] In an optional embodiment, the filter plate 171 is detachably connected with the first cavity 1.

[0056] In one or more embodiments, a support seat 18 is arranged at the bottom of the second cavity 2, and the support seat 18 can support the first cavity 1 and the second cavity 2 by abutting against the ground, so as to avoid the first cavity 1 and the second cavity 2 from falling over.

[0057] Specifically, the liquid inlet pipeline 5 and the liquid discharge pipeline 6 are both stainless steel pipelines, which have corrosion resistance and can ensure the durability of the durable filter device.

[0058] Specifically, the ultrafiltration membrane module 17 has a membrane pore size of 80 nm and a membrane pore density of approximately 10 / cm. At an operating pressure of 0.3 MPa and a temperature of 35 °C, the membrane flux of the ultrafiltration membrane is approximately 30 L / (m2·h).

[0059] Specifically, the inlet pipe 5 is connected to the rich liquid inlet of the absorption tower, and the outlet pipe 6 is connected to the distillation column.

[0060] This invention provides a filtration device for triethylene glycol-rich liquid. The triethylene glycol-rich liquid is filtered through an ultrafiltration membrane module 17 to remove condensate oil and solid impurities from the triethylene glycol-rich liquid, thereby preventing blockage of downstream equipment and pipelines.

[0061] This filtration device is installed next to the absorption tower, with a quick-opening blind flange 10 serving as the cover above the tank. It is connected to the first chamber 1 via a pressure relief valve 16 and two inlet pipelines. One pipeline is a steam pipeline connected to the reboiler, and the other pipeline is an inlet pipe 5 connected to the rich liquor inlet of the absorption tower. The rich liquor glycol containing various impurities flows into the filtration chamber 3 through the inlet pipe 5 and comes into contact with the ultrafiltration membrane module 17 in the filtration chamber 3 for filtration. The filtered clean triethylene glycol settles into the collection chamber 4 at the bottom of the filtration device and flows to the distillation column for heat exchange through the drain pipe 6 at the bottom. A sewage pipe 13 is installed at the bottom of the first chamber 1 and connects to the wastewater. A ball valve is installed between the first chamber 1 and the second chamber 2 as a shut-off valve 11. When the pressure in the inlet pipe 5 connected to the rich liquid pipeline of the absorption tower is too high, it indicates that the ultrafiltration membrane module 17 needs to be cleaned. At this time, close the inlet valve 7 and the shut-off valve 11 on the inlet pipe 5, open the steam valve 14 on the steam pipe 12 and the drain valve 15 on the drain pipe 13, and introduce steam to clean the ultrafiltration membrane module 17 at high temperature, evaporating the grease and impurities attached to the ultrafiltration membrane module 17. After the cleaning is completed, close the steam valve 14, close the drain valve 15, open the shut-off valve 11 and the inlet valve 7, and then put the filtration device into use.

[0062] Example 2

[0063] like Figure 2 The filtration device shown is for triethylene glycol-rich liquid. Its structure is roughly the same as that of Example 1. The difference from Example 1 is that no steam pipe and drain pipe are provided in the filtration chamber, and no shut-off valve is provided between the filtration chamber and the collection chamber. When the ultrafiltration membrane module becomes clogged, the operator can replace the columnar filter element through the maintenance port 9 by shutting off the inlet valve and the drain valve.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filter device for triethylene glycol rich liquid, characterized by The utility model relates to a kind of ultrafiltration membrane module and its installation method, including First cavity (1) and second cavity (2), the first cavity (1) is connected with the second cavity (2), the first cavity (1) is equipped with filter cavity (3), the second cavity (2) is equipped with liquid collecting cavity (4), the first cavity (1) is equipped with ultrafiltration membrane assembly (17), the ultrafiltration membrane assembly (17) separates the filter cavity (3) into filter front cavity (31) and filter rear cavity (32), the filter front cavity (31) is located in the top side of the ultrafiltration membrane assembly (17), the filter rear cavity (32) is located in the bottom side of the ultrafiltration membrane assembly (17), the liquid collecting cavity (4) is communicated with the filter rear cavity (32); The first cavity (1) is provided with liquid inlet pipeline (5) communicated with the filter front cavity (31), and the liquid inlet pipeline (5) is provided with liquid inlet valve (7); the second cavity (2) is provided with liquid outlet pipeline (6) communicated with the liquid collecting cavity (4), and the liquid outlet pipeline (6) is provided with liquid outlet valve (8); The first cavity (1) is provided with maintenance opening (9) communicated with the filter cavity (3), and the maintenance opening (9) is provided with cover plate (10).

2. A filter device for triethylene glycol rich liquid according to claim 1, characterized in that The first cavity (1) and the second cavity (2) are provided with cut-off valve (11).

3. A filter device for triethylene glycol rich liquid according to claim 2, characterized in that The first cavity (1) is provided with blowdown pipeline (13) and steam pipeline (12), the blowdown pipeline (13) is communicated with the filter rear cavity (32), and the blowdown pipeline (13) is provided with blowdown valve (15); the steam pipeline (12) is communicated with the filter front cavity (31), and the steam pipeline (12) is provided with steam valve (14).

4. The filter device for triethylene glycol rich liquid according to claim 1, wherein The first cavity (1) is provided with pressure relief valve (16), and the pressure relief valve (16) is communicated with the filter cavity (3).

5. A filter device for triethylene glycol rich liquid according to claim 4, characterized in that The maintenance opening (9) is opened in the top of the first cavity (1), and the maintenance opening (9) is communicated with the filter front cavity (31).

6. A filter device for triethylene glycol rich liquid according to claim 5, characterized in that The cover plate (10) is an arched cover, and the pressure relief valve (16) is arranged on the cover.

7. The filter device for triethylene glycol rich liquid according to claim 1, wherein The bottom of the liquid collecting cavity (4) is funnel-shaped, the liquid outlet pipeline (6) is communicated with the lowest part of the funnel, and the top of the liquid collecting cavity (4) is arc-shaped.

8. The filter device for triethylene glycol rich liquid according to claim 1, wherein The ultrafiltration membrane assembly (17) includes filter plate (171) and a plurality of cylindrical filter cores (172), the shape of the filter plate (171) is matched with the shape of the filter cavity (3), the cylindrical filter cores (172) are nested in the filter plate (171), and the filter plate (171) is connected with the first cavity (1).

9. A filter device for triethylene glycol rich liquid according to claim 8, characterized in that A plurality of through mounting holes are formed in the filter plate (171), the cylindrical filter cores (172) are nested in the mounting holes, and the side wall of the cylindrical filter core (172) is a mesh structure.

10. A filtration device for triethylene glycol-rich solutions according to any one of claims 1-9, characterized in that, The bottom of the second cavity (2) is provided with a support seat (18), and the support seat (18) is used for abutting ground.

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