Storage tank solvent self-cleaning type filtering system and storage tank system thereof

Abstract

The utility model relates to the technical field of solvent storage tanks, in particular to a storage tank solvent self-cleaning type filtering system and a storage tank system.The storage tank solvent self-cleaning type filtering system comprises a filtering mechanism, an inlet pipeline and an outlet pipeline, and the inlet pipeline is connected with a pre-filtering space of the filtering mechanism and an output pipeline of a storage tank; an outlet pipeline is connected with the filtered space of the filtering mechanism and a backflow pipeline of the storage tank; the inlet pipeline is provided with a first valve, and the outlet pipeline is provided with a second valve. The solvent in the storage tank can enter the filtering mechanism to be filtered through the inlet pipeline by virtue of the output pipeline under the power action of the pump, and the filtered solvent can enter the reflux pipeline to return to the storage tank through the outlet pipeline, so that the solvent in the storage tank is filtered and cleaned, impurities in the solvent are reduced, and impurity deposition in the storage tank is reduced; the storage tank system comprises the storage tank and the storage tank solvent self-cleaning type filtering system, the solvent is not prone to deposition in the storage tank after being filtered, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of solvent storage tanks, and particularly relates to a self-cleaning filtration system for storage tank solvents and a storage tank system thereof. Background Technique

[0002] The combined unit is a conventional unit in a natural gas purification plant. The solvent circulation system therein includes a solvent recovery tank, which is mainly used to collect solvents discharged during sampling and maintenance. When the solvent in the solvent recovery tank reaches a certain amount or the liquid level of the circulation system is too low, it is necessary to pump the solvent in the tank through a pump, and after filtration, it is returned to the solvent circulation system for use.

[0003] During the long-term operation of the combined unit, the circulating amine liquid carries a large amount of impurities. During the soaking and cleaning of equipment such as pumps and heat exchangers and the liquid discharge process of containers, the impurities enter the solvent recovery tank along with the amine liquid through the dense wiring. As the operation time continues, the impurities carried by the solvent will deposit on the inner wall of the storage tank, generating dirt, slime, etc. The existing solvent recovery tanks generally use horizontal storage tanks, and it is not easy to clean the impurities. The deposited impurities will not only occupy the storage capacity of the storage tank, reducing the liquid storage capacity of the storage tank, but also accelerate the corrosion of the storage tank and affect the service life of the storage tank. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art that impurities are easily deposited in the storage tank, occupying the storage capacity of the storage tank and affecting the service life of the storage tank, and to provide a self-cleaning filtration system for storage tank solvents and a storage tank system thereof.

[0005] In the first aspect, the utility model provides a self-cleaning filtration system for storage tank solvents, including:

[0006] A filtering mechanism, in which a pre-filter space and a post-filter space are provided;

[0007] An inlet pipeline, which connects the pre-filter space and the output pipeline of the storage tank;

[0008] An outlet pipeline, which connects the post-filter space and the return pipeline of the storage tank;

[0009] The inlet pipeline is provided with a first valve, and the outlet pipeline is provided with a second valve.

[0010] A self-cleaning filtration system for storage tank solvents of the present utility model provides a filtration mechanism that can be additionally provided on the basis of the output pipeline and the reflux pipeline of the storage tank. The solvent in the storage tank can enter the filtration mechanism through the output pipeline and the inlet pipeline for filtration treatment. The filtered solvent can enter the reflux pipeline through the outlet pipeline and return to the storage tank, realizing the filtration and cleaning of the solvent in the storage tank, reducing the impurities in the solvent, reducing the impurity deposition in the storage tank, and further achieving the effect of extending the service life of the storage tank. At the same time, it can keep the solvent in the storage tank in a flowing state, disturbing the solvent in the storage tank, so that the impurities in the solvent can be transported to the filtration mechanism with the solvent for filtration treatment, improving the cleanliness of the storage tank. In addition, a self-cleaning filtration system can be additionally provided on the basis of the existing output pipeline and reflux pipeline of the storage tank, with less modification to the original storage tank structure, and it can be more easily modified and installed on the existing storage tank, having high practicability.

[0011] Preferably, the filtration mechanism includes a bag filter. The bag filter can facilitate the removal of the internal structure for cleaning.

[0012] Preferably, the filtration mechanism includes a housing and a filter screen member. The filter screen member is detachably arranged in the housing. The top of the housing is detachably provided with a cover. The filter screen member divides the interior of the housing into a pre-filter space and a post-filter space.

[0013] Preferably, the filter screen member includes a mounting ring member and a filter screen. The mounting ring member is inclined in the housing. It can increase the inlet area of the filter screen member, making it easier for the solvent to enter the filter screen member.

[0014] Preferably, the filtration mechanism is connected with a cleaning pipeline. The cleaning pipeline includes a desalinated water pipeline and a cleaning outlet pipe. The cleaning outlet pipe communicates with the post-filter space. The cleaning outlet pipe is provided with a third valve. When the third valve is in the closed state, desalinated water is input into the filtration mechanism through the desalinated water pipeline for internal immersion cleaning of the filtration mechanism to avoid blockage of the filtration mechanism. After the third valve is opened, the desalinated water carrying impurities is discharged.

[0015] Preferably, the desalinated water pipeline is connected to the cleaning outlet pipe between the third valve and the filtration mechanism. It reduces the number of openings on the filtration mechanism and simplifies the pipeline structure.

[0016] Preferably, the cleaning pipeline further includes a cleaning inlet pipe. The cleaning inlet pipe communicates with the pre-filter space. The cleaning inlet pipe is connected to a gas supply mechanism. By inputting gas into the filtration mechanism, the filtration mechanism can be cleaned under the dual action of gas pressure and desalinated water replacement, improving the cleaning effect of the filtration mechanism and avoiding blockage of the filtration mechanism.

[0017] Preferably, the cleaning inlet pipe is connected to the inlet pipeline between the first valve and the filtering mechanism, and the cleaning outlet pipe is connected to the storage tank. This further reduces the number of openings on the filtering mechanism, simplifies the pipeline structure, and enables the liquid after cleaning to return to the storage tank for storage, reducing the difficulty and cost of liquid recovery and treatment.

[0018] Preferably, the outlet pipeline is connected to the bottom of the filtering mechanism, and the cleaning outlet pipe is connected to the side wall of the filtering mechanism.

[0019] In a second aspect, the present invention provides a storage tank system, including a storage tank and a self-cleaning filtering system for storage tank solvent as described above. The output pipeline and the reflux pipeline are respectively connected to the input filter of the solvent circulation system. The input filter is provided with a control valve, and the output pipeline is provided with a pump.

[0020] In the storage tank system of the present invention, due to the adoption of the above-mentioned self-cleaning filtering system for storage tank solvent, the solvent in the storage tank can, under the action of the pump power, enter the filtering mechanism through the output pipeline and the inlet pipeline for filtering treatment. The solvent after filtering treatment can enter the reflux pipeline through the outlet pipeline and return to the storage tank, realizing the filtering and cleaning of the solvent in the storage tank. After the solvent is filtered, the impurities therein are removed and are not easily deposited in the storage tank, extending the service life of the storage tank.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The present invention provides a self-cleaning filtering system for storage tank solvent, which can add a filtering mechanism on the basis of the output pipeline and the reflux pipeline of the storage tank. The solvent in the storage tank can enter the filtering mechanism through the output pipeline and the inlet pipeline for filtering treatment. The solvent after filtering treatment can enter the reflux pipeline through the outlet pipeline and return to the storage tank, realizing the filtering and cleaning of the solvent in the storage tank, reducing the impurities in the solvent, reducing the impurity deposition in the storage tank, and thus achieving the effect of extending the service life of the storage tank.

[0023] 2. The present invention provides a self-cleaning filtering system for storage tank solvent. By keeping the solvent in the storage tank in a flowing state and disturbing the solvent in the storage tank, the impurities in the solvent can be transported to the filtering mechanism along with the solvent for filtering treatment, improving the cleanliness in the storage tank.

[0024] 3. The present invention provides a self-cleaning filtering system for storage tank solvent, which can add a self-cleaning filtering system on the basis of the existing output pipeline and reflux pipeline of the storage tank, with less modification to the original storage tank structure. It can be relatively easily modified and installed on the existing storage tank, having high practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of a self-cleaning filtration system for storage tank solvents in Embodiment 1 (normal working state);

[0026] Figure 2 Schematic diagram of the structure of the filtration mechanism in Embodiment 1;

[0027] Figure 3 Schematic diagram of the structure of a self-cleaning filtration system for storage tank solvents in Embodiment 1 (filtration state);

[0028] Figure 4 Schematic diagram of the structure of a self-cleaning filtration system for storage tank solvents in Embodiment 2 (cleaning state);

[0029] Markings in the figure:

[0030] 1 - Filtration mechanism, 11 - Space before filtration, 12 - Space after filtration, 13 - Housing, 14 - Filter screen component, 141 - Mounting ring piece, 142 - Filter screen, 15 - Cover, 2 - Inlet pipeline, 3 - Outlet pipeline, 4 - First valve, 5 - Second valve, 6 - Storage tank, 61 - Output pipeline, 62 - Return pipeline, 63 - Input filter, 64 - Control valve, 65 - Pump, 7 - Cleaning pipeline, 71 - Desalination water pipeline, 72 - Cleaning outlet pipe, 73 - Third valve, 74 - Cleaning inlet pipe. Detailed implementation manners

[0031] The present utility model will be further described in detail below in conjunction with specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present utility model to the following embodiments. Any technology implemented based on the content of the present utility model falls within the scope of the present utility model.

[0032] In the description of the specific embodiments of the present utility model, without special explanation, the expression terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product / device / equipment of the present utility model is habitually used. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present utility model or simplifying the description in the specific embodiments, so as to facilitate technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present utility model.

[0033] In addition, when terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but it can be slightly inclined or deviated. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in the directions of "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the technical solution of the present utility model.

[0034] In addition, when expressions such as "first", "second", "third", etc. appear in the terms, they 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 specific components.

[0035] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a plurality of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be a situation exceeding 9.

[0036] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / limited, when terms such as "set", "installed", "connected", "connected", "provided with", "laid", "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be connection means commonly used in the art such as welding, riveting, bolting, threaded connection, etc. This kind of connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements.

[0037] Embodiment 1

[0038] Such as Figures 1 - 4As shown in the figure, a self-cleaning filtration system for solvents in a storage tank is applied to the solvent recovery storage tank 6 of the solvent circulation system. The storage tank 6 is an underground horizontal storage tank, which is provided with an output pipeline 61 and a reflux pipeline 62. The output pipeline 61 and the reflux pipeline 62 are respectively connected to the input filter 63 of the solvent circulation system. The input filter 63 is provided with a control valve 64, and the output pipeline 61 is provided with a pump 65. A self-cleaning filtration system for solvents in a storage tank includes a filtration mechanism 1, an inlet pipeline 2 and an outlet pipeline 3. The filtration mechanism 1 is separated by a filter screen member 14 to form a pre-filter space 11 and a post-filter space 12. The inlet pipeline 2 connects the pre-filter space 11 and the output pipeline 61 of the storage tank 6, and the outlet pipeline 3 connects the post-filter space 12 and the reflux pipeline 62 of the storage tank 6; the inlet pipeline 2 is provided with a first valve 4, and the outlet pipeline 3 is provided with a second valve 5.

[0039] In a self-cleaning filtration system for solvents in a storage tank of this embodiment, as Figure 1 shown, under normal working conditions, the solvent in the storage tank 6 is transported towards the input filter 63 under the action of the pump 65 in the output pipeline 61, enters the solvent circulation system for use after being filtered by the input filter 63, and the separated impurities and part of the liquid return to the storage tank 6 through the reflux pipeline 62 for storage, so that the solvent in the solvent circulation system flows and is used normally. However, the impurities in the storage tank 6 will accumulate more and more with the running time, affecting the liquid storage capacity and service life of the storage tank 6. Therefore, in this embodiment, by adding a filtration mechanism 1 on the basis of the output pipeline 61 and the reflux pipeline 62 of the storage tank 6, as Figure 3 shown, when solvent filtration treatment is required, the control valve 64 of the input filter 63 of the solvent circulation system is closed, so that the solvent in the storage tank 6 can enter the filtration mechanism 1 through the output pipeline 61 and the inlet pipeline 2 under the action of the pump 65 for filtration treatment. The filtered solvent can enter the reflux pipeline 62 through the outlet pipeline 3 and return to the storage tank 6, realizing the filtration and cleaning of the solvent in the storage tank 6, reducing the impurities in the solvent, reducing the impurity deposition in the storage tank 6, and thus achieving the effect of extending the service life of the storage tank 6. At the same time, the solvent in the storage tank 6 can be kept in a flowing state, disturbing the solvent in the storage tank 6, so that the impurities in the solvent can be transported to the filtration mechanism 1 with the solvent for filtration treatment, improving the cleanliness of the storage tank 6. In addition, by adding a self-cleaning filtration system on the basis of the existing output pipeline 61 and reflux pipeline 62 of the storage tank 6, the modification of the original structure of the storage tank 6 is small, and it can be easily modified and set on the existing storage tank 6, with high practicability.

[0040] In an optional implementation manner, the filtration mechanism 1 includes a bag filter. The bag filter has mature technology and can be purchased as a whole. It is convenient to take out the internal structure for cleaning, convenient for cleaning the impurities filtered out of the solvent, and reduces the system maintenance cost.

[0041] In an optional implementation manner, asFigure 2 As shown in the figure, the filtering mechanism 1 includes a housing 13 and a filter screen member 14. The filter screen member 14 is detachably arranged inside the housing 13. A cover 15 is detachably provided at the top of the housing 13. The filter screen member 14 divides the internal space of the housing 13 into a pre-filter space 11 and a post-filter space 12, which facilitates the disassembly and cleaning of the filtering mechanism 1 and is convenient for maintenance.

[0042] In an alternative embodiment, as Figure 2 shown, the filter screen member 14 includes a mounting ring member 141 and a filter screen 142. The mounting ring member 141 is inclined inside the housing 13. The inlet pipeline 2 passes through the side wall of the housing 13 and is arranged towards the area of the mounting ring member 141, which can increase the inlet area of the filter screen member 14, enabling the solvent input from the inlet pipeline 2 to enter the filter screen member 14 more easily and allowing the solvent to be fully filtered.

[0043] Embodiment 2

[0044] As Figure 4 shown, a self-cleaning filtration system for storage tank solvents in this embodiment has a structure similar to that of Embodiment 1. On the basis of Embodiment 1, the filtering mechanism 1 is connected to a cleaning pipeline 7. The cleaning pipeline 7 includes a desalination water pipeline 71 and a cleaning outlet pipe 72. The cleaning outlet pipe 72 communicates with the post-filter space 12, and a third valve 73 is provided on the cleaning outlet pipe 72.

[0045] In a self-cleaning filtration system for storage tank solvents in this embodiment, the desalination water pipeline 71 is used to convey desalinated water into the filtering mechanism 1 to clean the filter screen member 14 inside the filtering mechanism 1, so as to avoid blockage of the filtering mechanism 1. During the cleaning state, the first valve 4, the second valve 5, and the third valve 73 are kept in the closed state, making the filtering mechanism 1 independent of the storage tank 6 and the solvent circulation system. Desalinated water is input into the filtering mechanism 1 through the desalination water pipeline 71 for reverse flushing and immersion cleaning. After the cleaning is completed, the third valve 73 is opened to discharge the desalinated water carrying impurities.

[0046] In an alternative embodiment, the desalination water pipeline 71 is connected to the cleaning outlet pipe 72 between the third valve 73 and the filtering mechanism 1, reducing the number of openings on the filtering mechanism 1 and simplifying the pipeline structure.

[0047] In one or more embodiments, the cleaning pipeline 7 further includes a cleaning inlet pipe 74. The cleaning inlet pipe 74 communicates with the pre-filter space 11, and the cleaning inlet pipe 74 is connected to a gas supply mechanism. By inputting gas into the filtering mechanism 1, the filtering mechanism 1 can be cleaned under the dual action of gas pressure and desalinated water replacement, improving the cleaning effect of the filtering mechanism 1 and avoiding blockage of the filtering mechanism 1.

[0048] In an alternative embodiment, the gas supply mechanism inputs nitrogen into the filtering mechanism 1. By means of nitrogen pressure on the liquid, it is made difficult for the filtering mechanism 1 to become blocked, and impurities therein are easily removed, thus preventing the filtering mechanism 1 from being blocked.

[0049] In an alternative embodiment, the cleaning inlet pipe 74 is connected to the inlet pipeline 2 between the first valve 4 and the filtering mechanism 1, and the cleaning outlet pipe 72 is connected to the storage tank 6. The number of openings on the filtering mechanism 1 is further reduced, the pipeline structure is simplified, and the liquid after cleaning returns to the storage tank 6 for storage, reducing the difficulty and cost of liquid recovery and treatment.

[0050] In an alternative embodiment, the outlet pipeline 3 is connected to the bottom of the filtering mechanism 1, and the cleaning outlet pipe 72 is connected to the side wall of the filtering mechanism 1, enabling the input desalted water to perform backwashing on the side wall of the filter element 14, improving the clogging removal effect, and enabling the treated liquid to return to the storage tank 6 through the outlet pipeline 3, realizing the recovery of the liquid with impurities.

[0051] Embodiment 3

[0052] A storage tank system includes a storage tank 6 and a self-cleaning filtering system for storage tank solvent of Embodiment 2. The storage tank 6 is connected to the input filter 63 of the solvent circulation system through an output pipeline 61 and a return pipeline 62. The input filter 63 is provided with a control valve 64, and the output pipeline 61 is provided with a pump 65.

[0053] In the storage tank system of this embodiment, due to the adoption of the above-mentioned self-cleaning filtering system for storage tank solvent, the solvent in the storage tank 6 can, under the power of the pump 65, enter the filtering mechanism 1 through the output pipeline 61 and the inlet pipeline 2 for filtering treatment. The solvent after filtering treatment can enter the return pipeline 62 through the outlet pipeline 3 and return to the storage tank 6, realizing the filtering and cleaning of the solvent in the storage tank 6. The impurities in the solvent are removed through filtering treatment and are not easily deposited in the storage tank 6, prolonging the service life of the storage tank 6.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A self-cleaning filtration system for a storage tank solvent, characterized in that: include: A filtering mechanism (1), wherein a pre-filtering space (11) and a post-filtering space (12) are provided in the filtering mechanism (1); An inlet pipeline (2), the inlet pipeline (2) connecting the pre-filtration space (11) and an output pipeline (61) of the storage tank (6); An outlet pipeline (3), the outlet pipeline (3) connecting the post-filtration space (12) and a return pipeline (62) of the storage tank (6); The inlet pipeline (2) is provided with a first valve (4), and the outlet pipeline (3) is provided with a second valve (5).

2. A self-cleaning filtration system for solvent storage tanks as claimed in claim 1, characterized in that: The filtering mechanism (1) comprises a bag filter.

3. A self-cleaning filtration system for solvent storage tanks as claimed in claim 1, characterized in that: The filtering mechanism (1) comprises a housing (13) and a filter member (14); the filter member (14) is detachably arranged in the housing (13); a cover (15) is detachably provided on the top of the housing (13); and the filter member (142) divides the interior of the housing (13) into the pre-filtration space (11) and the post-filtration space (12).

4. A self-cleaning filtration system for solvents in a storage tank as claimed in claim 3, characterized in that: The filter screen (142) component comprises a mounting ring (141) and a filter screen (142), and the mounting ring (141) is arranged obliquely in the housing (13).

5. A self-cleaning filtration system for solvents in a storage tank according to any one of claims 1 to 4, characterized in that: The filtering mechanism (1) is connected to a cleaning pipeline (7), the cleaning pipeline (7) comprising a demineralized water pipeline (71) and a cleaning outlet pipe (72), the cleaning outlet pipe (72) being connected to the post-filtration space (12), and the cleaning outlet pipe (72) is provided with a third valve (73).

6. A self-cleaning filtration system for solvents in a storage tank as claimed in claim 5, characterized in that: The demineralized water pipeline (71) is connected to the cleaning outlet pipe (72) between the third valve (73) and the filtering mechanism (1).

7. A self-cleaning filtration system for solvents in a storage tank as claimed in claim 6, characterized in that: The cleaning pipeline (7) further comprises a cleaning inlet pipe (74), wherein the cleaning inlet pipe (74) is connected to the pre-filter space (11), and the cleaning inlet pipe (74) is connected to a gas supply mechanism.

8. A self-cleaning filtration system for solvents in a storage tank as claimed in claim 7, characterized in that: The cleaning inlet pipe (74) is connected to the inlet pipeline (2) between the first valve (4) and the filtering mechanism (1), and the cleaning outlet pipe (72) is connected to the storage tank (6).

9. A self-cleaning filtration system for solvents in a storage tank as claimed in claim 5, characterized in that: The outlet pipeline (3) is connected to the bottom of the filter mechanism (1), and the cleaning outlet pipe (72) is connected to the side wall of the filter mechanism (1).

10. A storage tank system, characterized in that: It comprises a storage tank (6) and a self-cleaning filtration system for storage tank solvent as described in any one of claims 1 to 9, wherein the output pipeline (61) and the return pipeline (62) are respectively connected to an input filter (63) of a solvent circulation system, the input filter (63) is provided with a control valve (64), and the output pipeline (61) is provided with a pump (65).

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