Control system of mining raw water filtering device

Abstract

The utility model discloses a control system of a mine raw water filtering device, which is used for solving the technical problems that when the mine raw water filtering device is blocked, which filter is blocked cannot be known in advance, and each filter needs to be washed, and belongs to the technical field of industrial automation control systems. A water inlet of a first-stage basket filter is sequentially connected with a main water inlet pressure sensor and a raw water inlet through pipelines, and a water outlet of the first-stage basket filter is sequentially connected with a first-stage filter outlet pressure sensor and a two-position five-way valve through pipelines; the two-position five-way valve is further sequentially connected with a second-stage filtering outlet pressure sensor and a water inlet of a third-stage security filter through a pipeline, and a water outlet of the third-stage security filter is sequentially connected with a third-stage filtering outlet pressure sensor and a water inlet of a fourth-stage reverse osmosis filter through a pipeline; a water outlet of the fourth-stage reverse osmosis filter is sequentially connected with a fourth-stage filtering outlet pressure sensor and a fourth-stage filtering water outlet through a pipeline, and the sensors are electrically connected with a PLC (Programmable Logic Controller).

Description

Technical Field

[0001] This utility model belongs to the field of industrial automation control system technology, and specifically relates to a control system for a mine raw water filtration device. Background Technology

[0002] Currently, mining raw water filtration devices generally have four stages of filtration: the first stage is a basket filter, which mainly filters impurities and solid particles in the water; the second stage is a fiber filter, which is mainly used to filter suspended particles in the water, and also has a certain removal effect on various large molecular organics, colloids, viruses, bacteria, etc.; the third stage is a security filter, which can effectively intercept or adsorb trace suspended particles, colloids, microorganisms, etc. in the water; and the fourth stage is a reverse osmosis filter, which mainly removes silt, rust, organic pollution, heavy metal ions, bacteria and residual chlorine from the water, which can greatly improve the safety of water quality.

[0003] Mining raw water filtration devices often experience filter clogging during prolonged use. In such cases, it is necessary to manually operate the valve to reverse the flow and backwash the filter, allowing the filter residue in the filter medium to be discharged from the filter, or to replace the filter element, thereby meeting the filtration requirements of the filtration device and ensuring water quality safety. Since it is impossible to know in advance which stage of the filter is clogged, each stage of the filter needs to be flushed. Utility Model Content

[0004] The purpose of this invention is to provide a control system for a mine raw water filtration device, which solves the technical problem that when a mine raw water filtration device becomes clogged, it is impossible to know in advance which stage of the filter is clogged, and each stage of the filter needs to be flushed.

[0005] This utility model is achieved using the following technical solution:

[0006] A control system for a mine raw water filtration device includes a primary basket filter. The inlet of the primary basket filter is connected in sequence to a main inlet pressure sensor and a raw water inlet via pipelines. The outlet of the primary basket filter is connected in sequence to a primary filter outlet pressure sensor and a two-position five-way valve via pipelines. The primary basket filter also has a primary filter drain outlet controlled by a primary filter drain valve. A mixer is installed on the upper side of the primary basket filter. The two-position five-way valve is connected to a secondary fiber filter and a secondary filter drain outlet, respectively. The two-position five-way valve is also connected in sequence to a secondary filter outlet pressure sensor via pipelines. The system includes the inlet of the main filter and the inlet of the three-stage security filter. The outlet of the three-stage security filter is connected in sequence to the outlet pressure sensor of the three-stage filter and the inlet of the four-stage reverse osmosis filter via pipelines. The outlet of the four-stage reverse osmosis filter is connected in sequence to the outlet pressure sensor of the four-stage filter and the outlet of the four-stage filter via pipelines. The four-stage reverse osmosis filter is also equipped with a drain outlet of the four-stage filter controlled by an inlet flow control valve. The main inlet pressure sensor, the outlet pressure sensor of the first-stage filter, the outlet pressure sensor of the second-stage filter, the outlet pressure sensor of the third-stage filter, and the outlet pressure sensor of the fourth-stage filter are all electrically connected to a PLC controller.

[0007] In application, the main inlet pressure sensor and the primary filter outlet pressure sensor can detect the raw water pressure entering the primary basket filter and the outlet pressure after passing through the primary basket filter, respectively. When a large amount of impurities accumulate in the media of the primary basket filter, the main inlet pressure sensor and the primary filter outlet pressure sensor will transmit the detection results back to the PLC controller. The pressure difference calculated by the PLC controller will exceed the set value, which indicates that the primary basket filter is blocked.

[0008] The secondary filter outlet pressure sensor can detect the outlet pressure after filtration by the secondary fiber filter. At the same time, the primary filter outlet pressure sensor acts as the inlet pressure sensor for the secondary filter to detect the inlet pressure of the secondary fiber filter. When a large amount of impurities accumulate in the secondary fiber filter medium, the primary and secondary filter outlet pressure sensors will transmit the detection results back to the PLC controller. The pressure difference calculated by the PLC controller will exceed the set value, indicating that the secondary fiber filter is blocked.

[0009] The tertiary filter outlet pressure sensor can detect the outlet pressure after filtration by the tertiary security filter. At the same time, the secondary filter outlet pressure sensor acts as the inlet pressure sensor for the tertiary filter, detecting the inlet pressure of the tertiary security filter. When a large amount of impurities accumulate in the medium of the tertiary security filter, the secondary and tertiary filter outlet pressure sensors will transmit the detection results back to the PLC controller. The pressure difference calculated by the PLC controller will exceed the set value, indicating that the tertiary security filter is blocked.

[0010] The fourth-stage filter outlet pressure sensor detects the outlet pressure after filtration by the fourth-stage reverse osmosis filter. Meanwhile, the third-stage filter outlet pressure sensor acts as the inlet pressure sensor for the fourth-stage filter, detecting the inlet pressure. When a significant amount of impurities accumulates in the fourth-stage reverse osmosis filter medium, both the third-stage and fourth-stage filter outlet pressure sensors transmit their detection results back to the PLC controller. The pressure difference calculated by the PLC controller will exceed the set value, indicating that the fourth-stage reverse osmosis filter is clogged.

[0011] More preferably, both the primary filter drain valve and the inlet flow control valve are electrically connected to a PLC controller.

[0012] More preferably, the mixer is electrically connected to a PLC controller.

[0013] More preferably, the two-position five-way valve is electrically connected to a PLC controller.

[0014] More preferably, the PLC controller includes a touch screen, on which the start and stop of the mixer, the two-position five-way valve, the primary filter drain valve, and the inlet flow control valve can be operated independently. The touch screen can directly observe the real-time values ​​of the total inlet pressure sensor, the primary filter outlet pressure sensor, the secondary filter outlet pressure sensor, the tertiary filter outlet pressure sensor, and the quaternary filter outlet pressure sensor.

[0015] More preferably, the two-position five-way valve includes port 1, port 2, port 3, port 4, and port 5. The pipeline connected to the primary filter outlet pressure sensor is connected to port 1. The inlet of the secondary fiber filter is connected to port 3. The outlet of the secondary fiber filter is connected to port 5. The secondary fiber filter is connected to port 2. Port 4 is connected to the pipeline connected to the secondary filter outlet pressure sensor.

[0016] This invention can perform real-time monitoring of each stage of the filter to ensure the equipment is in optimal working condition, and can quickly locate clogged filters to facilitate timely handling of problems in the mine raw water filtration device. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the present invention.

[0020] In the diagram: 1. Raw water inlet; 2. Primary basket filter; 3. Main inlet pressure sensor; 4. Mixer; 5. Primary filter drain valve; 6. Primary filter drain outlet; 7. Primary filter outlet pressure sensor; 8. Two-position five-way valve; 9. Secondary filter drain outlet; 10. Secondary fiber filter; 11. Secondary filter outlet pressure sensor; 12. Tertiary security filter; 13. Tertiary filter outlet pressure sensor; 14. Quaternary reverse osmosis filter; 15. Quaternary filter outlet pressure sensor; 16. Quaternary filter outlet; 17. Inlet flow control valve; 18. Quaternary filter drain outlet; 19. Touch screen; 20. PLC controller. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0022] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0024] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] Example 1: A control system for a mine raw water filtration device includes a primary basket filter 2. The inlet of the primary basket filter 2 is connected in sequence to a main inlet pressure sensor 3 and a raw water inlet 1 via pipelines. The outlet of the primary basket filter 2 is connected in sequence to a primary filter outlet pressure sensor 7 and a two-position five-way valve 8 via pipelines. The primary basket filter 2 is also equipped with a primary filter drain outlet 6 controlled by a primary filter drain valve 5. A mixer 4 is installed on the upper side of the primary basket filter 2. The two-position five-way valve 8 is connected to a secondary fiber filter 10 and a secondary filter drain outlet 9, respectively. The two-position five-way valve 8 is also connected in sequence to a secondary filter outlet pressure sensor 11 and a tertiary filter via pipelines. The inlet of the three-stage security filter 12 and the outlet of the three-stage security filter 12 are connected in sequence to the outlet pressure sensor of the three-stage filter and the inlet of the four-stage reverse osmosis filter 14 via pipelines. The outlet of the four-stage reverse osmosis filter 14 is connected in sequence to the outlet pressure sensor of the four-stage filter and the outlet of the four-stage filter 16 via pipelines. The four-stage reverse osmosis filter 14 is also equipped with a drain outlet 18 controlled by the inlet flow control valve 17. The total inlet pressure sensor 3, the outlet pressure sensor of the first-stage filter 7, the outlet pressure sensor of the second-stage filter 11, the outlet pressure sensor of the third-stage filter 13, and the outlet pressure sensor of the fourth-stage filter 15 are all electrically connected to the PLC controller 20.

[0026] In application, the tertiary filter outlet pressure sensor 13 can detect the outlet pressure after filtration by the tertiary security filter 12. At the same time, the secondary filter outlet pressure sensor 11 acts as the inlet pressure sensor of the tertiary security filter 12 to detect the inlet pressure of the tertiary security filter 12. When a large amount of impurities accumulate in the medium of the tertiary security filter 12, the PLC controller 20 will issue an alarm message, and then the filter medium in the tertiary security filter 12 needs to be replaced manually.

[0027] In Example 2, the primary filter drain valve 5 is electrically connected to a PLC controller 20, and the mixer 4 is electrically connected to a PLC controller 20.

[0028] In application, the total inlet water pressure sensor 3 and the primary filter outlet pressure sensor 7 can detect the raw water pressure entering the primary basket filter 2 and the outlet pressure after filtration by the primary basket filter 2, respectively. When a large amount of impurities accumulate in the medium of the primary basket filter 2, the PLC controller 20 controls the agitator 4 to stir the liquid in the primary basket filter 2, thereby loosening the filter residue and discharging the impurities through the primary filter drain outlet 6.

[0029] The working principle is as follows: the raw water inlet 1 is connected to the inlet of the first-stage basket filter 2. At the same time, the pipeline is equipped with a total inlet water pressure sensor 3 to measure the inlet water pressure of the first-stage basket filter 2. The first-stage filter drain outlet 6 is connected to the drain outlet of the first-stage basket filter 2. At the same time, the pipeline is equipped with a first-stage filter drain valve 5. A mixer 4 is installed on the upper side of the first-stage basket filter 2. The outlet of the first-stage basket filter 2 is connected to the inlet of the two-position five-way valve 8. At the same time, the pipeline is equipped with a first-stage filter outlet pressure sensor 7 to measure the outlet water pressure of the first-stage basket filter 2, which also serves as the inlet water pressure of the second-stage fiber filter 10.

[0030] In Example 3, a two-position five-way valve 8 is electrically connected to a PLC controller 20.

[0031] In application, the secondary filter outlet pressure sensor 11 can detect the outlet pressure after filtration by the secondary fiber filter 10. At the same time, the primary filter outlet pressure sensor 7 acts as the inlet pressure sensor of the secondary fiber filter 10 to detect the inlet pressure of the secondary fiber filter 10. When a large amount of impurities accumulate in the medium of the secondary fiber filter 10, the PLC controller 20 controls the electric two-position five-way valve 8 to switch directions, backwash the secondary fiber filter 10, and discharge the impurities.

[0032] The working principle is as follows: the inlet and outlet of the secondary fiber filter 10, as well as the secondary filter drain outlet 9, are connected to a two-position five-way valve 8. The inlet of the tertiary security filter 12 is also connected to the two-position five-way valve 8. A secondary filter outlet pressure sensor 11 is installed on the pipeline to measure the outlet pressure of the secondary fiber filter 10, which also serves as the inlet pressure of the tertiary security filter 12. The outlet of the tertiary security filter 12 is connected to the inlet of the quaternary reverse osmosis filter 14. A tertiary filter outlet pressure sensor 13 is also installed on the pipeline to detect the outlet pressure of the tertiary security filter 12, which also serves as the inlet pressure of the quaternary reverse osmosis filter 14.

[0033] In Example 4, the inlet flow control valve 17 is electrically connected to a PLC controller 20.

[0034] In application, the fourth-stage filter outlet pressure sensor 15 can detect the outlet pressure after filtration by the fourth-stage reverse osmosis filter 14, while the third-stage filter outlet pressure sensor 13 acts as the inlet pressure sensor of the fourth-stage reverse osmosis filter 14 to detect the inlet pressure of the fourth-stage filter. When a large amount of impurities accumulate in the medium of the fourth-stage reverse osmosis filter 14, the PLC controller 20 controls the inlet water flow control valve 17 to release the pressure in the reverse osmosis filter, and at the same time increases the flow rate on the surface of the reverse osmosis membrane to flush the deposited impurities.

[0035] The working principle is as follows: the outlet 16 of the fourth-stage filter is connected to the outlet of the fourth-stage reverse osmosis filter 14. A pressure sensor 15 for the outlet of the fourth-stage filter is installed on the pipeline to measure the outlet pressure of the fourth-stage reverse osmosis filter 14. The drain outlet 18 of the fourth-stage filter is connected to the fourth-stage reverse osmosis filter 14. An inlet flow control valve 17 is installed on the pipeline to regulate the pressure and flow rate on the surface of the reverse osmosis membrane in the fourth-stage reverse osmosis filter 14.

[0036] In Example 5, the two-position five-way valve 8 includes ports 1, 2, 3, 4, and 5. A pipeline connected to the primary filter outlet pressure sensor 7 is connected to port 1. The inlet of the secondary fiber filter 10 is connected to port 3, the outlet of the secondary fiber filter 10 is connected to port 5, the secondary fiber filter 10 is connected to port 2, and port 4 is connected to a pipeline connected to the secondary filter outlet pressure sensor 11. The total inlet pressure sensor 3, the primary filter outlet pressure sensor 7, the secondary filter outlet pressure sensor 11, the tertiary filter outlet pressure sensor 13, and the quaternary filter outlet pressure sensor 15 are connected to the input terminal of the PLC controller 20. The primary filter drain valve 5 and the inlet flow control valve 17 are electrically connected to the output terminal of the PLC controller 20.

[0037] The working principle of the control system of a mine raw water filtration device in automatic filtration mode is as follows:

[0038] When the primary basket filter 2 is in automatic filtration mode, the primary filter drain valve 5 is closed. Raw water flows from the raw water inlet 1 through the inlet of the primary basket filter 2 and out through the outlet. At this time, the system automatically detects the values ​​of the total inlet pressure sensor 3 and the primary filter outlet pressure sensor 7 and performs a subtraction operation. When the difference between the two is greater than or equal to the system set value, the system automatically cleans the primary basket filter 2. First, the PLC controller 20 controls the two-position five-way valve 8 to operate to the closed state (to prevent sewage from flowing in). Then, the PLC controller 20 controls the primary filter drain valve 5 to open, and at the same time, the agitator 4 is started to flush the primary basket filter 2. The flushed sewage is discharged through the primary filter drain outlet 6. When the system set flushing time is reached, the PLC controller 20 first controls the agitator 4 to stop, then operates the two-position five-way valve 8 to the filtration state, and finally closes the primary filter drain valve 5.

[0039] When the secondary fiber filter 10 is in automatic filtration mode, the two-position five-way valve 8 is in filtration mode. At this time, port 1 is connected to port 3, and port 5 is connected to port 4. Water flows through the two-position five-way valve 8, entering from the top of the secondary fiber filter 10 and exiting from the bottom. It then passes through the two-position five-way valve 8 again to enter the next stage of filtration. At this time, the system automatically detects the values ​​of the pressure sensor 11 at the outlet of the secondary filter and the pressure sensor 7 at the outlet of the primary filter and performs a subtraction operation. When the difference between the two values ​​is greater than or equal to the system set value, the PLC controller 20 controls the two-position five-way valve 8 to operate in backwash mode. At this time, port 1 is connected to port 5, and port 3 is connected to port 2. Water flows through the two-position five-way valve 8, entering from the bottom of the secondary fiber filter 10 and exiting from the top. The wastewater after backwashing is discharged through the secondary filter drain port 9. When the system set backwash time is reached, the PLC controller 20 controls the two-position five-way valve 8 to operate in filtration mode.

[0040] When the three-stage safety filter 12 is in automatic filtration mode, the system will automatically detect the values ​​of the three-stage filter outlet pressure sensor 13 and the two-stage filter outlet pressure sensor 11 and perform a subtraction operation. When the difference between the two values ​​is greater than or equal to the system set value, the system will issue an alarm message, prompting the worker to replace the filter element of the three-stage safety filter 12.

[0041] When the four-stage reverse osmosis filter 14 is in automatic filtration mode, the inlet flow control valve 17 will be closed. After the water flows through the reverse osmosis membrane, it will be discharged from the four-stage filter outlet 16 for use by subsequent equipment. At the same time, the system will automatically detect the values ​​of the four-stage filter outlet pressure sensor 15 and the three-stage filter outlet pressure sensor 13 and perform a subtraction operation. When the difference between the two is greater than or equal to the system set value, the PLC controller 20 controls the inlet flow control valve 17 to be fully opened, thereby increasing the flow rate across the surface of the reverse osmosis membrane. The large flow rate is used to wash away impurities on the surface of the reverse osmosis membrane. When the system set flushing time is reached, the PLC controller 20 controls the inlet flow control valve 17 to be closed, and the equipment enters the normal filtration state.

[0042] Example 6: The working principle of the control system of a mine raw water filtration device in time-based filtration mode is as follows: The system will perform rinsing according to the set time intervals for each stage of filtration. In this mode, the priority of pressure difference is higher than the priority of time. That is, if the pressure difference reaches the rinsing threshold within the set time interval, the system will automatically rinse the filter and reset the time interval.

[0043] In Example 7, the PLC controller 20 includes a touch screen 19. The touch screen 19 can independently operate the start and stop of the mixer 4, the two-position five-way valve 8, the primary filter drain valve 5, and the inlet flow control valve 17. It can directly observe the real-time values ​​of the total inlet pressure sensor 3, the primary filter outlet pressure sensor 7, the secondary filter outlet pressure sensor 11, the tertiary filter outlet pressure sensor 13, and the quaternary filter outlet pressure sensor 15.

[0044] The working principle of the control system of a mine raw water filtration device in manual filtration mode is as follows: The operator can operate the equipment individually on the touchscreen 19 according to the actual situation, including controlling the operation and stop of the mixer 4; opening and closing the primary filter drain valve 5; closing, filtration, and backwashing of the two-position five-way valve 8; opening and closing the inlet flow control valve 17; and simultaneously, the operator can see the real-time values ​​of all pressure sensors on the touchscreen 19, including the total inlet pressure sensor 3; the primary filter outlet pressure sensor 7; the secondary filter outlet pressure sensor 11; the tertiary filter outlet pressure sensor 13; and the quaternary filter outlet pressure sensor 15.

[0045] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A control system for a mine raw water filtration device, characterized in that: The system includes a primary basket filter (2), whose inlet is connected in sequence to a main inlet pressure sensor (3) and a raw water inlet (1) via a pipeline. The outlet of the primary basket filter (2) is connected in sequence to a primary filter outlet pressure sensor (7) and a two-position five-way valve (8) via a pipeline. The primary basket filter (2) is also equipped with a primary filter drain outlet (6) controlled by a primary filter drain valve (5). A mixer (4) is installed on the upper side of the primary basket filter (2). The two-position five-way valve (8) is connected to a secondary fiber filter (10) and a secondary filter drain outlet (9) respectively. The two-position five-way valve (8) is also connected in sequence to a secondary filter outlet pressure sensor (11) and a tertiary security filter (12) via a pipeline. The outlet of the three-stage security filter (12) is connected in sequence to the outlet pressure sensor (13) of the three-stage filter and the inlet of the four-stage reverse osmosis filter (14) through a pipeline. The outlet of the four-stage reverse osmosis filter (14) is connected in sequence to the outlet pressure sensor (15) of the four-stage filter and the outlet of the four-stage filter (16) through a pipeline. The four-stage reverse osmosis filter (14) is also equipped with a drain outlet (18) of the four-stage filter controlled by the inlet flow control valve (17). The total inlet pressure sensor (3), the outlet pressure sensor (7) of the first-stage filter, the outlet pressure sensor (11) of the second-stage filter, the outlet pressure sensor (13) of the third-stage filter and the outlet pressure sensor (15) of the fourth-stage filter are all electrically connected to the input terminal of the PLC controller (20).

2. The control system for a mine raw water filtration device according to claim 1, characterized in that: The primary filter drain valve (5) and the inlet flow control valve (17) are both electrically connected to the output terminal of the PLC controller (20).

3. The control system for a mine raw water filtration device according to claim 2, characterized in that: The mixer (4) is electrically connected to a PLC controller (20).

4. The control system of the mine raw water filtration device according to claim 3, characterized in that: The two-position five-way valve (8) is electrically connected to a PLC controller (20).

5. The control system of the mine raw water filtration device according to claim 4, characterized in that: The PLC controller (20) includes a touch screen (19). The touch screen (19) can be used to operate the start and stop of the mixer (4), the two-position five-way valve (8), the primary filter drain valve (5), and the inlet flow control valve (17) independently. The touch screen (19) can directly observe the real-time values ​​of the total inlet pressure sensor (3), the primary filter outlet pressure sensor (7), the secondary filter outlet pressure sensor (11), the tertiary filter outlet pressure sensor (13), and the quaternary filter outlet pressure sensor (15).

6. The control system of a mine raw water filtration device according to any one of claims 1-5, characterized in that: The two-position five-way valve (8) includes port 1, port 2, port 3, port 4 and port 5. The pipeline connected to the primary filter outlet pressure sensor (7) is connected to port 1. The inlet of the secondary fiber filter (10) is connected to port 3. The outlet of the secondary fiber filter (10) is connected to port 5. The secondary fiber filter (10) is connected to port 2. Port 4 is connected to the pipeline connected to the secondary filter outlet pressure sensor (11).

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