Stock solution regenerating soilless filtration system

Abstract

This utility model discloses a soilless filtration system for raw liquid regeneration, relating to the field of filtration technology. It includes: a raw liquid tank, a delivery pump, a residue-free filter cartridge, and a purified liquid tank connected in sequence. The residue-free filter cartridge includes a cylinder and a filter element. The bottom of the cylinder has a drain port and an inlet pipe, while the top has an outlet pipe, a cleaning pipe, and a third air supply pipe. A drain valve is installed at the drain port. The top of the inner cavity of the cylinder is connected to the first air supply pipe, and the bottom of the inner cavity is connected to a residual pressure return pipe. The purified liquid tank is connected to the cleaning pipe. In this utility model, the first air supply pipe is used for raw pressure return to avoid waste during solid removal. The third air supply pipe blows the filter cake off and discharges it. The cleaning pipe regenerates the filter element, resulting in good filter element regeneration. When using raw liquid for backflow cleaning, the residue inside the cylinder remains raw liquid and does not affect subsequent raw liquid filtration.

Description

Technical Field

[0001] This utility model relates to the field of filtration technology, and in particular to a soilless filtration system for raw liquid regeneration. Background Technology

[0002] With the rapid development and application of advanced technologies, the requirements for fluids in both daily life and industrial production are becoming increasingly stringent, especially for beverages. Currently, filter machines are frequently used as the main filtration equipment for beverages. The core component of a filter machine is the filter element. However, during use, the filter element will gradually become clogged by impurities and will no longer be able to work. If the filter element that cannot work is discarded and replaced with a new one, it will result in a large investment in consumables.

[0003] In existing technologies, backwashing regeneration is often used to solve the problem of filter clogging. Specifically, gas or liquid is used as the cleaning fluid. The cleaning fluid enters from the outlet of the filter element and flows in the opposite direction to the filtrate, thereby flushing out the impurities clogging the filter element and discharging them from the drain port at the bottom of the filter. However, during the discharge process, the cleaning fluid is discharged along with the original liquid and impurities in the filter, resulting in waste of the original liquid. Moreover, when using liquid for discharge, some liquid will remain in the filter element, affecting the filtrate used for subsequent filtration.

[0004] Therefore, there is an urgent need for a soilless filtration system that uses raw liquid for regeneration, has a good regeneration effect, and saves raw liquid resources. Utility Model Content

[0005] The purpose of this invention is to provide a soilless filtration system for raw liquid regeneration to solve the problems existing in the prior art. Before sewage discharge, the raw liquid in the cylinder is pumped out through the air supply of the first air supply pipeline, which reduces the waste of raw liquid during sewage discharge and improves the regeneration effect. During cleaning, the raw liquid is used as the reflux of the cleaning liquid to reduce the impact of residual cleaning liquid on the filtrate.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a soilless filtration system for raw liquid regeneration, comprising a raw liquid tank, a delivery pump, at least one residue-free filter cartridge, and a purified liquid tank connected in sequence. The residue-free filter cartridge includes a cylinder body and a filter element. The filter element is vertically arranged inside the cylinder body. The bottom of the cylinder body is provided with a solid discharge port and a liquid inlet pipe. The top of the cylinder body is provided with a liquid outlet pipe, a cleaning pipe, and a third air supply pipe, all of which are connected to the filter element. A solid discharge valve is provided at the solid discharge port. The top of the inner cavity of the cylinder body is connected to the first air supply pipe. The bottom of the inner cavity of the cylinder body is connected to a residual pressure return pipe. Valves are provided on the liquid inlet pipe, the liquid outlet pipe, the cleaning pipe, the first air supply pipe, the residual pressure return pipe, and the third air supply pipe. The purified liquid tank is connected to the cleaning pipe.

[0007] Preferably, the residue-free filter cartridge is connected to the purified liquid tank via a precision filter.

[0008] Preferably, the purification liquid tank is connected to the cleaning pipeline and the liquid outlet pipeline of the precision filter through a pump body and a filter, respectively.

[0009] Preferably, the pipeline between the precision filter and the purified liquid tank is connected to the cleaning pipeline, and valves are provided on both the connecting pipeline between the precision filter and the cleaning pipeline and the connecting pipeline between the precision filter and the purified liquid tank.

[0010] Preferably, the bottom of the purified liquid tank is provided with a discharge pipe, and the discharge pipe is provided with a purified liquid delivery pump and a valve body. The purified liquid delivery pump and the valve body of the discharge pipe are both electrically connected to the control system.

[0011] Preferably, the bottom of the inner cavity of the cylinder is connected to a second air supply pipeline, and a valve is provided on the second air supply pipeline.

[0012] Preferably, the first gas supply line, the second gas supply line, and the third gas supply line are all connected to the compressed gas supply equipment via a main gas supply line, and the main gas supply line is equipped with a pressure regulating valve for controlling the pressure.

[0013] Preferably, the top of the cylinder is provided with a residual liquid outlet pipe, the outlet of the residual liquid outlet pipe is connected to the original liquid tank, and the inlet is located at the bottom of the inner cavity of the filter element.

[0014] The present invention achieves the following main technical effects compared to the prior art:

[0015] The gas supplied through the first air supply line can pump the original liquid in the cylinder into the residual liquid return line to avoid waste during solid removal. After all the original liquid in the cylinder is pumped out, the solid removal valve and the third air supply line are opened to blow the filter cake off and discharge it. Then, the solid removal valve is closed and the cleaning line is opened to move from the inside of the filter element to the outside of the filter element, removing the remaining impurities on the filter element and realizing the regeneration of the filter element. When using the original liquid for backflow cleaning, the residue in the cylinder is still the original liquid, which does not affect the subsequent original liquid filtration. During the original liquid cleaning, the solid removal valve is in the closed state.

[0016] The other solutions of this utility model achieve the following technical effects compared to the prior art:

[0017] The combination of the second air supply line and the exhaust line enables gas to circulate within the cylinder, achieving the blowing and solidification of the filter cake. At this point, the filter cake becomes less sticky due to the lack of moisture. The gas from the third air supply line blows air from the inside of the filter element to the outside, more effectively blowing off the filter cake and impurities within the filter element, improving the regeneration effect of the filter element, reducing the impurity content in the raw liquid during subsequent raw liquid cleaning, and at the same time, the debris discharged from the solidification outlet has a low water content, improving its ease of cleaning and subsequent sludge treatment, which meets environmental protection requirements.

[0018] The combination of the second air supply line and the residual liquid discharge line can discharge the residual liquid inside the filter element. After the machine is stopped, it can ensure that no filtrate remains in the filter element, thus avoiding the waste of this part of the filtrate. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a system diagram of the soilless filtration system for raw liquid regeneration in an embodiment of this utility model;

[0021] The components include: 1. Raw material tank; 2. Residue-free filter cartridge; 3. Precision filter; 4. Purified liquid tank; 5. Residue discharge pipeline; 6. First air supply pipeline; 7. Third air supply pipeline; 8. Cleaning pipeline; 9. Second air supply pipeline; and 10. Solid discharge valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The purpose of this invention is to provide a soilless filtration system for raw liquid regeneration to solve the problems existing in the prior art. Before sewage discharge, the raw liquid in the cylinder is pumped out through the air supply of the first air supply pipeline, which reduces the waste of raw liquid during sewage discharge and improves the regeneration effect. During cleaning, the raw liquid is used as the reflux of the cleaning liquid to reduce the impact of residual cleaning liquid on the filtrate.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Please refer to the following: Figure 1 As shown, a soilless filtration system for raw liquid regeneration is provided, comprising a raw liquid tank 1, a transfer pump, at least one residue-free filter cartridge 2, and a purified liquid tank 4 connected in sequence. The transfer pump pumps the raw liquid in the raw liquid tank 1 to the residue-free filter cartridge 2 for filtration, and then the filtered liquid is stored in the purified liquid tank 4. The residue-free filter cartridge 2 includes a cylinder and filter elements. The filter elements are vertically arranged in the cylinder through a partition inside the cylinder. To improve the filtration effect, multiple filter elements are arranged in the cylinder. A solid discharge port and a liquid inlet pipe are provided at the bottom of the cylinder, and an liquid outlet pipe, a cleaning pipe 8, and a third air supply pipe 7 are provided at the top. The liquid outlet pipe, the cleaning pipe 8, and the third air supply pipe 7 are all connected to the inner cavity of the filter elements. A solid discharge valve 10 is provided at the solid discharge port. The top of the inner cavity of the cylinder is connected to the first air supply pipe 6, and the bottom of the inner cavity of the cylinder is connected to a residual pressure return pipe. The liquid inlet pipe and the liquid outlet pipe are also connected to the filter elements. Valves are installed on the cleaning pipeline 8, the first air supply pipeline 6, the third air supply pipeline 7, and the residual hydraulic return pipeline. The purified liquid tank 4 is connected to the cleaning pipeline 8. The power source for the cleaning liquid supplied by the cleaning pipeline 8 is a delivery pump. The working principle of this system is as follows: the gas supplied by the first air supply pipeline 6 can push the original liquid in the cylinder into the residual hydraulic return pipeline to avoid waste during solid removal. After all the original liquid in the cylinder is squeezed out, the solid removal valve 10 and the third air supply pipeline 7 are opened to blow down and discharge the filter cake. Then, the solid removal valve 10 is closed and the cleaning pipeline 8 is opened to move from the inside of the filter element to the outside of the filter element, removing the remaining impurities on the filter element and realizing the regeneration of the filter element. When using the original liquid for backflow cleaning, the residue in the cylinder is still the original liquid, which does not affect the subsequent original liquid filtration. During original liquid cleaning, the solid removal valve 10 is in the closed state.

[0026] To improve the filtration effect of the raw liquid, the residue-free filter cartridge 2 is connected to the purified liquid tank 4 through the precision filter 3, which is equivalent to using a secondary filtration method to filter the raw liquid.

[0027] The purification liquid tank 4 is connected to the cleaning pipeline 8 and the liquid outlet pipeline of the precision filter 3 through the pump body and the filter respectively. The pump body and the filter are designed so that the whole system can perform a major wash periodically. That is, the pump body and the filter are used to pump the filtrate in the purification liquid tank 4 to the precision filter 3 and the residue-free filter cartridge 2, and the filter elements of both are simultaneously backwashed.

[0028] The pipeline between the precision filter 3 and the purification liquid tank 4 is connected to the cleaning pipeline 8. Valves are installed on the connecting pipeline between the precision filter 3 and the cleaning pipeline 8, as well as on the connecting pipeline between the precision filter 3 and the purification liquid tank 4. The opening and closing of the relevant pipelines can be controlled by controlling the opening and closing of the valves.

[0029] The bottom of the purified liquid tank 4 is equipped with a discharge pipeline, on which a purified liquid transfer pump and a valve body are installed. Both the purified liquid transfer pump and the valve body of the discharge pipeline are electrically connected to the control system.

[0030] The bottom of the inner cavity of the cylinder is connected to a second air supply pipe 9, which is equipped with a valve. The cooperation between the second air supply pipe 9 and the exhaust pipe enables the flow of gas within the cylinder. The exhaust pipe can be directly installed on the cylinder to solidify the filter cake. At this time, the filter cake has reduced viscosity due to lack of moisture. The gas from the third air supply pipe 7 is used to blow air from the inside of the filter element to the outside, which more effectively blows off the filter cake and impurities in the filter element, improves the regeneration effect of the filter element, reduces the impurity content in the raw liquid during the subsequent raw liquid cleaning process, and the impurities discharged from the discharge port have a low water content, which improves the ease of cleaning and the ease of subsequent sludge treatment, meeting environmental protection requirements.

[0031] The first gas supply line 6, the second gas supply line 9, and the third gas supply line 7 are all connected to the compressed gas supply equipment through the main gas supply line. The main gas supply line is equipped with a pressure regulating valve for controlling the pressure.

[0032] The main air supply line has a branch that connects to the liquid outlet of the precision filter 3, which can be regenerated by backflushing. A valve is installed on the branch.

[0033] A filter can be installed at the air inlet of the main gas supply line to improve the cleanliness of the gas.

[0034] An air storage tank is installed between the main gas supply pipeline and the compressed gas supply equipment to act as a buffer.

[0035] The top of the cylinder is equipped with a residual liquid outlet pipe 5. The outlet of the residual liquid outlet pipe 5 is connected to the raw liquid tank 1, and the inlet is located at the bottom of the inner cavity of the filter element. The cooperation between the second air supply pipe 9 and the residual liquid outlet pipe 5 can use pressure to discharge the residual liquid in the filter element through the residual liquid outlet pipe 5. After the machine is stopped, it can be ensured that no filtrate remains in the filter element, thus avoiding the waste of this part of the filtrate.

[0036] The residual pressure return pipeline is connected to the original liquid tank 1. The returned original liquid enters the original liquid tank 1 for storage. At the same time, in order to improve the pressure return effect of the original liquid, the inlet of the residual pressure return pipeline should be set close to the bottom of the inner cavity of the cylinder.

[0037] The exhaust pipe and the residual pressure return pipe can exist as the same pipe.

[0038] The liquid outlets of multiple filter elements inside the cylinder are connected to a central pipe, which collects the filtrate from multiple filter elements and discharges it. The liquid outlet pipe, cleaning pipe 8, and third air supply pipe 7 of the cylinder are all connected to the filter elements through the liquid outlet of the central pipe of several filter elements. The specific liquid outlet pipe, cleaning pipe 8, third air supply pipe 7, and central pipe are connected by a four-way connector.

[0039] To reduce the need for drilling at the bottom of the cylinder, the residual hydraulic return line and the inlet line are connected to the bottom of the cylinder's inner cavity via a connecting pipe.

[0040] In this embodiment, several residual liquid-free filter cartridges 2 are connected in parallel between the delivery pump and the precision filter 3. The multiple residual liquid-free filter cartridges 2 work alternately. When a residual liquid-free filter cartridge 2 is being regenerated, a residual liquid-free filter cartridge 2 needs to be in working state to improve the working efficiency of the system. When multiple residual liquid-free filter cartridges 2 are connected in parallel, since the filtered raw liquid continuously enters the precision filter 3 and then enters the purified liquid tank 4 from the precision filter 3, there is no need to set a delivery pump on the cleaning pipeline 8. The power is provided by the delivery pump at the front end of the residual liquid-free filter cartridge 2 in working state (the valve between the precision filter 3 and the purified liquid tank 4 needs to be closed; when only one residual liquid-free filter cartridge 2 or multiple residual liquid-free filter cartridges 2 are set in series, a delivery pump needs to be set on the cleaning pipeline 8 to provide power).

[0041] The liquid outlet pipe of the cylinder and the liquid outlet pipe of the precision filter 3 are both connected to the raw liquid tank 1 through branch pipes, which are used to re-supply the filtered liquid into the raw liquid tank 1 for repeated filtration to improve the filtration effect. Valves are installed on the branch pipes.

[0042] The outlet pipe of the purified liquid tank 4 is connected to the original liquid tank 1 via a branch pipe, so that the purified liquid can be re-supplied into the original liquid tank 1 for further filtration.

[0043] A flow meter is installed on the liquid outlet pipe of the cylinder to detect the flow rate in real time. When the flow rate decreases, it indicates that the filter element in the cylinder is clogged. A flow meter is also installed on the liquid outlet pipe of the purified liquid tank 4 to detect the liquid outlet flow rate.

[0044] In this system, all valves are controlled by the control system, which improves the system's level of automation.

[0045] The above-mentioned soilless filtration system solid-liquid separation and regeneration method for the raw solution regeneration soilless filtration system includes the following steps:

[0046] S1: The control system stops the liquid inlet of the liquid inlet pipeline, opens the residual pressure return pipeline and the first air supply pipeline 6, and the air enters the cylinder and occupies the space inside the cylinder. The raw liquid inside the cylinder is squeezed out from the residual pressure return pipeline and the squeezed raw liquid is collected for the next filtration.

[0047] S2: After the original hydraulic pressure is discharged, the control system closes the residual hydraulic pressure return line and the first air supply line 6, and opens the second air supply line 9 and the exhaust line. When the gas moves from bottom to top, it passes the location of the filter element and blows the filter cake solid by airflow.

[0048] S3: After the solidification is completed, close the second air supply line 9 and the exhaust line, open the third air supply line 7 and the solid discharge valve 10 to blow off and discharge the filter cake and impurities outside the filter element, thus completing the solid-liquid separation.

[0049] S4: After the filter cake is discharged, close the third air supply line 7 and the solid discharge valve 10, open the cleaning line 8 and the residual pressure return line, and the raw liquid flows from the filter element into the cylinder in the opposite direction to the flow of the filtrate to achieve backwashing and clean the residual impurities on the filter membrane of the filter element.

[0050] If the system needs to be shut down later, after cleaning in step S4, close the cleaning pipeline 8 and open the first air supply pipeline 6. The original liquid in the cylinder will be forced out. After the original liquid is discharged, close the first air supply pipeline 6 and the residual liquid return pipeline, and open the second air supply pipeline 9 and the residual liquid outlet pipeline 5. Gas enters the filter element cavity from the cylinder. As the gas in the filter element cavity increases, the residual liquid in the filter element is forced out from the filter element, thus exporting the residual liquid in the filter element to the original liquid tank 1.

[0051] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0052] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A soilless filtration system for raw liquid regeneration, characterized in that, The system comprises a raw liquid tank, a transfer pump, at least one residue-free filter cartridge, and a purified liquid tank, which are connected in sequence. The residue-free filter cartridge includes a cylinder body and a filter element. The filter element is vertically arranged inside the cylinder body. The bottom of the cylinder body has a drain port and a liquid inlet pipe. The top of the cylinder body has a liquid outlet pipe, a cleaning pipe, and a third air supply pipe, all of which are connected to the filter element. A drain valve is installed at the drain port. The top of the inner cavity of the cylinder body is connected to the first air supply pipe. The bottom of the inner cavity of the cylinder body is connected to a residual pressure return pipe. Valves are installed on the liquid inlet pipe, the liquid outlet pipe, the cleaning pipe, the first air supply pipe, the residual pressure return pipe, and the third air supply pipe. The purified liquid tank is connected to the cleaning pipe.

2. The soilless filtration system for raw liquid regeneration according to claim 1, characterized in that, The residue-free filter cartridge is connected to the purified liquid tank via a precision filter.

3. The soilless filtration system for raw liquid regeneration according to claim 2, characterized in that, The purification liquid tank is connected to the cleaning pipeline and the liquid outlet pipeline of the precision filter via a pump and a filter, respectively.

4. The soilless filtration system for raw liquid regeneration according to claim 2, characterized in that, The pipeline between the precision filter and the purified liquid tank is connected to the cleaning pipeline, and valves are installed on both the connecting pipeline between the precision filter and the cleaning pipeline and the connecting pipeline between the precision filter and the purified liquid tank.

5. The soilless filtration system for raw liquid regeneration according to claim 1, characterized in that, The bottom of the purified liquid tank is provided with a discharge pipe, and the discharge pipe is equipped with a purified liquid delivery pump and a valve body. The purified liquid delivery pump and the valve body of the discharge pipe are both electrically connected to the control system.

6. The soilless filtration system for raw liquid regeneration according to claim 1, characterized in that, The bottom of the inner cavity of the cylinder is connected to a second air supply pipeline, and a valve is installed on the second air supply pipeline.

7. The soilless filtration system for raw liquid regeneration according to claim 6, characterized in that, The first, second, and third gas supply lines are all connected to the compressed gas supply equipment via a main gas supply line, and the main gas supply line is equipped with a pressure regulating valve for controlling the pressure.

8. The soilless filtration system for raw liquid regeneration according to claim 6, characterized in that, The top of the cylinder is provided with a residual liquid outlet pipe, the outlet of which is connected to the original liquid tank, and the inlet is located at the bottom of the inner cavity of the filter element.

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