Multiple sets of storage tanks collectively filtering system

Abstract

The utility model relates to walnut processing technical field, specifically related to multiple groups of storage tank common multiple filtration system, including at least three storage tanks, each storage tank is divided into upper clarifying zone and lower sedimentation zone, and the bottom of storage tank is connected with blowdown pipe, and the inlet end of blowdown pipe is flush with the bottom of lower sedimentation zone, and the blowdown valve is installed on the blowdown pipe, the top of each storage tank is connected with one root for the input pipeline of pressing crude oil and two first conveying pipes, and the inlet end of first conveying pipe is located at upper clarifying zone position, and the first filter pump is installed on each first conveying pipe, one second conveying pipe is arranged between the adjacent two storage tanks, and the outlet end of corresponding first conveying pipe of adjacent two storage tanks is connected with second conveying pipe, and the second filter pump is installed on each second conveying pipe, and the outlet end of all second conveying pipes is connected with third conveying pipe, and the third filter pump is installed on third conveying pipe.

Description

Technical Field

[0001] This utility model relates to the field of walnut processing technology, specifically to a multi-stage filtration system using multiple storage tanks. Background Technology

[0002] In the refining of walnut oil, the pressed crude oil needs to undergo multi-stage filtration to remove walnut kernel fragments and waxy sediment. Current technology employs a series of storage tanks with a tiered filtration system. The process is as follows: 1. Sedimentation and impurity removal: The pressed crude oil is fed into the first storage tank and allowed to settle. The denser walnut kernel fragments and waxy sediment settle to form a mud layer, with the upper layer being the primary clarified oil; 2. Primary coarse filtration: The primary clarified oil is pumped through a first pipeline to the second storage tank, where a primary filtration device (such as a filter bag) is installed to filter the primary clarified oil into coarse filtered oil; 3. Secondary fine filtration: The primary clarified oil is pumped through a second pipeline to the third storage tank, where a secondary filtration device (such as a filter cartridge) is installed to further filter the coarse filtered oil. Finally, the walnut oil after secondary fine filtration is discharged through a third pipeline. However, the existing technology has the following three technical problems:

[0003] 1. Low conveying efficiency: Since the above-mentioned series storage tank cascade filtration system only has one first storage tank for settling and settling of the pressed crude oil, it takes a period of time for the pressed crude oil to be fed into the first storage tank until it is completely filled. It also takes a period of time for the filled pressed crude oil to settle and settle. After this part of the pressed crude oil flows out of the first storage tank and passes through the subsequent primary coarse filtration and secondary fine filtration, it needs to go through the process of feeding pressed crude oil, settling and settling, primary coarse filtration and secondary fine filtration again. This process is repeated and takes a lot of time, resulting in low conveying efficiency.

[0004] Furthermore, because the storage tanks in the aforementioned series-connected cascade filtration system are transported via only a single connected pipe, the transport path is limited, and the pipe diameter directly restricts the flow rate, resulting in a low overall flow velocity. Moreover, walnut oil must completely flow through the preceding storage tank before entering the next; replacing the filter equipment in any storage tank or repairing any pipe will forcibly interrupt subsequent transport. For example, when the filter bag in the second storage tank is replaced, the coarse filtered oil in the first storage tank cannot continue to flow, causing upstream equipment to shut down and creating a "chain reaction shutdown," which also leads to low transport efficiency.

[0005] 2. Complex structure: Since the above-mentioned series storage tank cascade filtration system installs the filtration equipment (such as filter bags, filter elements, etc.) inside the storage tank, a support frame needs to be installed inside the storage tank to support the filtration equipment. In order to ensure that the walnut oil is fully filtered, there need to be corresponding seals between the support frame and the storage tank, and between the support frame and the filtration equipment, so that all the walnut oil can pass through the filter holes of the filtration equipment. This makes the structure relatively complex.

[0006] 3. High investment cost: The filtration equipment in the above-mentioned series storage tank cascade filtration system needs to be customized according to the diameter of the storage tank. For example, a storage tank with a diameter of 5 meters requires a filter element with a diameter of 5 meters to be customized, which is costly. In addition, installing and welding it into the storage tank also requires a lot of manpower.

[0007] Therefore, there is an urgent need to design a multi-tank, multi-filtration system to solve the technical problems of low conveying efficiency, complex structure, and high investment cost of existing technologies. Utility Model Content

[0008] The present invention aims to provide a multi-tank, multi-filtration system to solve the technical problems of low conveying efficiency, complex structure, and high investment cost in the prior art.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] 1) A multi-tank, multi-filtration system, characterized in that it comprises at least three storage tanks, each of which is divided into an upper clarification zone and a lower sedimentation zone. A drain pipe is connected to the bottom of each storage tank, with the inlet end of the drain pipe flush with the bottom of the lower sedimentation zone. A drain valve is installed on the drain pipe. Each storage tank is connected to a top of an input pipe for introducing pressed crude oil and two first conveying pipes. The inlet end of each first conveying pipe is located at the upper clarification zone. A first filter pump is installed on each of the first conveying pipes. A second conveying pipe is provided between each pair of adjacent storage tanks. The outlet ends of the corresponding first conveying pipes of the two adjacent storage tanks are connected to the second conveying pipe. A second filter pump is installed on each of the second conveying pipes. The outlet ends of all the second conveying pipes are connected to a third conveying pipe, on which a third filter pump is installed.

[0011] When using this invention to filter crude oil, the oil is simultaneously fed into each storage tank through the input pipe at the top of each tank. This invention includes at least three storage tanks, each of which independently receives crude oil, achieving parallel input. After a period of settling, the walnut kernel fragments and waxy sediments in the crude oil will naturally settle. The upper clarification zone is used to collect primary clarified oil, while the lower sedimentation zone is used to settle walnut kernel fragments and waxy sediments to form a mud layer. Operators can periodically discharge the mud layer through the drain pipe by periodically opening the drain valve.

[0012] After the walnut kernel fragments and waxy sediment settle to the lower sedimentation zone, the first filtration pump is turned on to perform a primary filtration on the primary clarified oil pumped from the upper clarification zone of each storage tank to the first delivery pipe, obtaining primary filtered oil. The second filtration pump pumps the primary filtered oil from the corresponding first delivery pipes of two adjacent storage tanks in parallel to the second delivery pipe, achieving multi-path flow. During this process, the primary clarified oil in the two first delivery pipes can be mixed and then filtered a second time to obtain secondary filtered oil. Then, the third filtration pump pumps all the secondary filtered oil from the second delivery pipes in parallel to the third delivery pipe. During this process, all the secondary filtered oil in the second delivery pipes can be mixed and then filtered a third time to finally obtain refined walnut oil. In operation, the operator can simultaneously operate the input and output of multiple storage tanks without waiting for a single tank to complete the entire process.

[0013] This invention features multiple storage tanks for the natural settling of walnut kernel fragments and waxy sediments in crude pressed oil. Multiple tanks operate simultaneously, allowing for parallel crude oil input, settling, and filtration. This avoids the bottleneck caused by a single tank in existing technologies, where only one tank is used for settling. The parallel multi-path piping increases flow rate, preventing flow limitations imposed by a single pipe diameter and preventing system-wide shutdowns due to maintenance, thus eliminating "chain-reaction shutdowns" and improving the overall conveying efficiency. The filtration function is achieved by a first, second, and third filter pump, rather than being installed inside the storage tanks. The pumps drive the oil flow while simultaneously performing filtration, with the storage tanks only used for settling. This simplifies the internal structure and overall design of the invention. Integrated pump filtration facilitates standardized production, eliminating the need for customized large-scale filtration equipment based on the storage tank diameter, reducing manufacturing costs. The modular design of the piping and pumps reduces installation and welding labor costs, further lowering the initial investment cost.

[0014] 2) According to the multi-tank multiple filtration system described in 1), wherein: the storage tank located in the upper clarification zone is cylindrical, and the storage tank located in the lower sedimentation zone is conical.

[0015] The cylindrical upper clarification zone reduces oil flow disturbance, stabilizes the oil layer, and improves the quality of the primary clarified oil. The conical lower sedimentation zone concentrates walnut kernel fragments and waxy sediments, shortens the settling time, and improves the overall transport efficiency. In addition, during the settling process of the walnut kernel fragments and waxy sediments in the conical lower sedimentation zone, they will converge towards the bottom center. Since the inlet end of the drain pipe is flush with the bottom of the lower sedimentation zone, that is, the inlet end of the drain pipe is flush with the bottom center of the conical lower sedimentation zone, only a small amount of oil will be mixed and discharged during the draining process, which can reduce oil loss.

[0016] 3) According to the multi-tank common multiple filtration system described in 1), wherein: a capacitive liquid level sensor is installed on the inner side wall of the storage tank, the capacitive liquid level sensor is electrically connected to a microprocessor, and the microprocessor is electrically connected to all the first filtration pumps.

[0017] A capacitive level sensor monitors the liquid level in the upper clarification zone of each storage tank in real time. The data measured by the capacitive level sensor is then sent to a microprocessor. The microprocessor sets the data measured by the capacitive level sensor in real time as the measured value. A low liquid level value and a high liquid level value are preset in the microprocessor. When the measured value is greater than the high liquid level value, the first filter pump is started to extract the primary clarified oil from the upper clarification zone. When the measured value is lower than the low liquid level value, the first filter pump is turned off to prevent the first filter pump from running dry.

[0018] Capacitive level sensors detect liquid levels based on changes in the dielectric constant of the oil, offering high accuracy and resistance to oil contamination. Automated control reduces manual intervention time, and level monitoring ensures continuous sedimentation and oil extraction, eliminating waiting times caused by improper level management in existing technologies and improving delivery efficiency. The use of capacitive level sensors and microprocessors to replace manual valve control reduces operational complexity and lowers labor costs.

[0019] 4) According to the multi-tank common multiple filtration system described in 1), wherein: the first filtration pump is provided with a first filter screen, the second filtration pump is provided with a second filter screen, and the third filtration pump is provided with a third filter screen, wherein the mesh size of the first filter screen is smaller than that of the second filter screen and the third filter screen.

[0020] A first filter screen is fixedly connected to the inlet of the first filter pump, a second filter screen is fixedly connected to the inlet of the second filter pump, and a third filter screen is fixedly connected to the inlet of the third filter pump. In the first filtration process, the oil flow path is as follows: upper clarified oil → first delivery pipeline → first filter pump (passing through the first filter screen) → large particles are trapped → output to the second delivery pipeline. In the second filtration process, the oil flow path is as follows: oil flows into the second delivery pipeline → second filter pump (passing through the second filter screen) → medium-sized particles are removed → output to the third delivery pipeline. In the third filtration process, the oil flow path is as follows: all oil flows into the third delivery pipeline → third filter pump (passing through the third filter screen) → smaller particles are trapped → finished oil is output. The mesh size of the first, second, and third filter screens increases sequentially to avoid overloading the preceding filter screens and causing clogging.

[0021] The beneficial effects of this utility model are as follows:

[0022] This invention features multiple storage tanks for the natural settling of walnut kernel fragments and waxy sediments in crude pressed oil. Multiple tanks operate simultaneously, allowing for parallel crude oil input, settling, and filtration. This avoids the bottleneck of waiting in a single storage tank, a problem present in existing technologies. The parallel multi-path piping increases flow rate, preventing flow limitations imposed by a single pipe diameter and preventing system-wide shutdowns due to maintenance, thus eliminating "chain-reaction shutdowns" and improving the overall conveying efficiency. The filtration function is achieved by a first, second, and third filter pump, rather than being installed inside the storage tanks. The pumps drive the oil flow while simultaneously performing filtration, with the storage tanks used only for settling. This simplifies the internal structure and overall design. Integrated pump filtration facilitates standardized production, eliminating the need for custom-designed large-scale filtration equipment based on the storage tank diameter, reducing manufacturing costs. The modular design of the piping and pumps reduces installation and welding labor costs, further lowering the initial investment.

[0023] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0024] Figure 1 This is a top view of the multi-tank multiple-filtration system of this utility model;

[0025] Figure 2 This is a front view of one of the storage tanks in the multi-group storage tanks of this utility model.

[0026] In the diagram: 1. Storage tank; 11. Upper clarification zone; 12. Lower sedimentation zone; 2. Drain pipe; 3. Drain valve; 4. Input pipe; 5. First conveying pipe; 6. First filter pump; 7. Second conveying pipe; 8. Second filter pump; 9. Third conveying pipe; 10. Third filter pump. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0032] Please see Figures 1-2 This utility model discloses a multi-tank, multi-filtration system, comprising at least three storage tanks 1. Each storage tank 1 is divided into an upper clarification zone 11 and a lower sedimentation zone 12. A drain pipe 2 is connected to the bottom of each storage tank 1, with the inlet end of the drain pipe 2 flush with the bottom of the lower sedimentation zone 12. A drain valve 3 is installed on the drain pipe 2. Each storage tank 1 is connected to an input pipe 4 for introducing pressed crude oil and two first conveying pipes 5 at the top. The inlet end of the first conveying pipe 5 is located at the upper clarification zone 11, and a first filter pump 6 is installed on each first conveying pipe 5. A second conveying pipe 7 is provided between each pair of adjacent storage tanks 1, and the outlet ends of the corresponding first conveying pipes 5 of the two adjacent storage tanks 1 are connected to the second conveying pipe 7. A second filter pump 8 is installed on each second conveying pipe 7. The outlet ends of all the second conveying pipes 7 are connected to a third conveying pipe 9, and a third filter pump 10 is installed on the third conveying pipe 9.

[0033] In this embodiment, there are three storage tanks 1, six first conveying pipes 5, and three second conveying pipes 7. When filtering the crude pressed oil using this embodiment, the oil is simultaneously fed into each storage tank 1 through the input pipe 4 at the top of each storage tank 1. This embodiment includes three storage tanks 1, each of which independently receives the crude pressed oil, achieving parallel input. After a period of settling, the walnut kernel fragments and waxy sediments in the crude pressed oil will naturally settle. The upper clarification zone 11 is used to collect the primary clarified oil, and the lower sedimentation zone 12 is used to settle the walnut kernel fragments and waxy sediments to form a mud layer. The operator can periodically discharge the mud layer through the drain pipe 2 by periodically opening the drain valve 3.

[0034] After the walnut kernel fragments and waxy sediment settle to the lower sedimentation zone 12, the first filter pump 6 is turned on to perform a first filtration on the primary clarified oil pumped from the upper clarification zone 11 of each storage tank 1 to the first delivery pipe 5, obtaining primary filtered oil. The second filter pump 8 pumps the primary filtered oil from the first delivery pipes 5 corresponding to two adjacent storage tanks 1 in parallel to the second delivery pipe 7, achieving multi-path flow. During this process, the primary clarified oil in the two first delivery pipes 5 can be mixed and then filtered a second time to obtain secondary filtered oil. Then, the third filter pump 10 pumps all the secondary filtered oil in the second delivery pipes 7 in parallel to the third delivery pipe 9. During this process, all the secondary filtered oil in the second delivery pipes 7 can be mixed and then filtered a third time to finally obtain refined walnut oil. When this utility model is in operation, the operator can operate the input and output of multiple storage tanks 1 simultaneously without waiting for a single tank to complete the entire process.

[0035] This embodiment features multiple storage tanks 1 for the natural settling of walnut kernel fragments and waxy sediments in crude pressed oil. Multiple storage tanks 1 operate simultaneously, allowing crude oil input, settling, and filtration to occur in parallel. This avoids the bottleneck caused by only one tank performing settling in existing technologies. The parallel multi-path pipelines increase flow rate, preventing flow limitations imposed by a single pipeline diameter. This also prevents system-wide shutdowns due to maintenance, eliminating "chain shutdowns" and improving the conveying efficiency of this invention. The filtration function is achieved by a first filter pump 6, a second filter pump 8, and a third filter pump 10, rather than being installed inside the storage tanks 1. The pumps drive the oil flow while simultaneously performing filtration; the storage tanks 1 are only used for settling, simplifying the internal structure and making the overall structure of this invention simpler. Pump-integrated filtration facilitates standardized production, eliminating the need for custom-designed large-scale filtration equipment based on the diameter of the storage tanks 1, thus reducing manufacturing costs. The modular design of the pipelines and pumps reduces installation and welding labor costs, further lowering the overall investment cost of this invention.

[0036] In this embodiment: the storage tank 1 located in the upper clarification zone 11 is cylindrical, and the storage tank 1 located in the lower sedimentation zone 12 is conical. The cylindrical upper clarification zone 11 can reduce oil flow disturbance, stabilize the oil layer, and improve the quality of the primary clarified oil; the conical lower sedimentation zone 12 can concentrate walnut kernel fragments and waxy sediments, shorten the settling time, and improve the overall conveying efficiency. In addition, during the settling process of the walnut kernel fragments and waxy sediments in the conical lower sedimentation zone 12, they will converge towards the bottom center. Since the inlet end of the drain pipe 2 is flush with the bottom of the lower sedimentation zone 12, that is, the inlet end of the drain pipe 2 is flush with the bottom center of the conical lower sedimentation zone 12, only a small amount of oil will be mixed and discharged during the draining process, which can reduce oil loss.

[0037] In this embodiment: a capacitive level sensor is installed on the inner wall of storage tank 1. The capacitive level sensor is electrically connected to a microprocessor, and the microprocessor is electrically connected to all the first filter pumps 6. The capacitive level sensor in this embodiment can be an FRD-8021. The capacitive level sensor monitors the liquid level height of the upper clarification zone 11 of each storage tank 1 in real time, and then sends the data measured by the capacitive level sensor to the microprocessor. The microprocessor sets the data measured by the capacitive level sensor in real time as the measured value. A low liquid level value and a high liquid level value are preset in the microprocessor. When the measured value is greater than the high liquid level value, the first filter pump 6 is started to extract the primary clarified oil from the upper clarification zone 11. When the measured value is lower than the low liquid level value, the first filter pump 6 is turned off to prevent the first filter pump 6 from running dry.

[0038] Capacitive level sensors detect liquid levels based on changes in the dielectric constant of the oil, offering high accuracy and resistance to oil contamination. Automated control reduces manual intervention time, and level monitoring ensures continuous sedimentation and oil extraction, eliminating waiting times caused by improper level management in existing technologies and improving delivery efficiency. The use of capacitive level sensors and microprocessors to replace manual valve control reduces operational complexity and lowers labor costs.

[0039] In this embodiment: a first filter screen is installed in the first filter pump 6, a second filter screen is installed in the second filter pump 8, and a third filter screen is installed in the third filter pump 10. The mesh size of the first filter screen is smaller than that of the second filter screen, which is smaller than that of the third filter screen. In this embodiment, the first filter pump 6, the second filter pump 8, and the third filter pump 10 can all be model YG-80-250. The first filter screen is fixedly connected to the suction inlet of the first filter pump 6 via a flange structure, the second filter screen is fixedly connected to the suction inlet of the second filter pump 8 via a flange structure, and the third filter screen is fixedly connected to the suction inlet of the third filter pump 10 via a flange structure. The mesh size of the first filter screen is 100 mesh, the second filter screen is 200 mesh, and the third filter screen is 300 mesh.

[0040] In the first filtration process, the oil flow path is as follows: upper clarified oil → first conveying pipe 5 → first filter pump 6 (passing through the first filter screen) → large particles are trapped → output to the second conveying pipe 7. In the second filtration process, the oil flow path is as follows: oil flows into the second conveying pipe 7 → second filter pump 8 (passing through the second filter screen) → medium-sized particles are removed → output to the third conveying pipe 9. In the third filtration process, the oil flow path is as follows: all oil flows into the third conveying pipe 9 → third filter pump 10 (passing through the third filter screen) → smaller particles are trapped → finished oil is output. The mesh size of the first, second, and third filter screens increases sequentially to avoid overloading the preceding filter screens and causing clogging.

[0041] The above are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A multi-tank, multi-filtration system, characterized in that: The system includes at least three storage tanks, each divided into an upper clarification zone and a lower sedimentation zone. A drain pipe connects to the bottom of each tank, with its inlet flush with the bottom of the lower sedimentation zone. A drain valve is installed on the drain pipe. Each storage tank has an input pipe for introducing pressed crude oil and two first conveying pipes connected to its top. The inlet of each first conveying pipe is located in the upper clarification zone, and a first filter pump is installed on each first conveying pipe. A second conveying pipe connects each pair of adjacent storage tanks, with the outlets of the corresponding first conveying pipes of adjacent tanks sharing a common connection to the second conveying pipe. A second filter pump is installed on each second conveying pipe. The outlets of all second conveying pipes share a common connection to a third conveying pipe, on which a third filter pump is installed.

2. The multi-tank multiple-filtration system according to claim 1, characterized in that: The storage tank located in the upper clarification zone is cylindrical, and the storage tank located in the lower sedimentation zone is conical.

3. The multi-tank multiple-filtration system according to claim 1, characterized in that: A capacitive liquid level sensor is installed on the inner wall of the storage tank. The capacitive liquid level sensor is electrically connected to a microprocessor, which is electrically connected to all the first filter pumps.

4. The multi-tank common multiple filtration system according to claim 1, characterized in that: The first filter pump is equipped with a first filter screen, the second filter pump is equipped with a second filter screen, and the third filter pump is equipped with a third filter screen. The mesh size of the first filter screen is smaller than that of the second filter screen and the third filter screen.

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