A laboratory water treatment filtration device and filtration method thereof

Abstract

The invention belongs to the technical field of laboratory water treatment, and specifically relates to a laboratory water treatment filtering device and a filtering method thereof; the device comprises: a water sample container, a double-layer supporting device, an AC contactor A, an AC contactor B, an AC contactor C, a grounding device, two guide rails, a filter A, a filter B, a vacuum pump, a hose, a manual valve A, a manual valve B, a solenoid valve A, a solenoid valve B, a three-way joint, a liquid level relay B, a liquid level relay A, a liquid level relay C and a plurality of signal cables and control cables; the device is used to effectively solve the technical problems that the manual filtering process of water samples in a nuclear power plant environment monitoring laboratory is complicated, has high intensity and is easy to cause operating errors.

Description

Technical Field

[0001] The invention belongs to the technical field of laboratory water treatment, and in particular relates to a laboratory water treatment filtering device and a filtering method thereof. Background Art

[0002] In a nuclear power plant environmental monitoring laboratory, before daily laboratory analysis and monitoring of water samples, it is necessary to pre-treat the water samples according to the experimental procedures. One of the important processes is to filter the water samples. During filtration, the filtration speed is slow, and the experimental analysts need to operate, monitor and replenish water on site throughout the process. Replenishment of water is required about once every 15 minutes, and personnel frequently perform water replenishment operations. When replenishing water, it is necessary to lift the bucket containing the water sample (about 20 kg) and pour water into the filter device. One experiment requires more than 30 water replenishment operations, which is labor-intensive. In particular, there are more women among the experimental analysts, and they need to frequently move heavy water sample buckets to replenish water to the filter. The labor intensity is high, which easily causes water samples to spill, and occupies human resources, greatly reducing work efficiency and delaying the total time consumed by laboratory analysis.

[0003] Therefore, it is necessary to design a dual-channel filtration device and filtration method that can increase the filtration speed, realize automatic water replenishment and automatic filtration, and automatically stop at the end of filtration when filtering laboratory analytical water samples, so as to improve the deficiencies of the above-mentioned prior art. Summary of the invention

[0004] The purpose of the present invention is to design a laboratory water treatment filtration device and a filtration method thereof, which are used to effectively solve the technical problems that the manual filtration process of water samples in the nuclear power plant environment monitoring laboratory is complicated, intensive and prone to operating errors.

[0005] The technical solution of the present invention:

[0006] A laboratory water treatment and filtering device, comprising: a water sample container, a double-layer support device, an AC contactor A, an AC contactor B, an AC contactor C, a grounding device, two guide rails, a filter A, a filter B, a vacuum pump, a hose, a manual valve A, a manual valve B, a solenoid valve A, a solenoid valve B, a three-way connector, a liquid level relay B, a liquid level relay A, a liquid level relay C and a plurality of signal cables and control cables;

[0007] The top of the double-layer support device is an upper partition, on which a water sample container and two guide rails are respectively arranged, and the lower part of the water sample container is connected to one end of the pipeline; a three-way joint is arranged at the other end of the pipeline, and the three-way joint divides the pipeline into left and right pipelines, wherein a manual valve A and a solenoid valve A are respectively arranged on the left pipeline of the pipeline; a manual valve B and a solenoid valve B are respectively arranged on the right pipeline of the pipeline; the bottom of the double-layer support device is a lower partition; a filter A and a filter B are respectively arranged on the left and right sides of the lower partition; the left pipeline of the pipeline is arranged above the filter A; the right pipeline of the pipeline is arranged above the filter B, and the lower partition is also connected to a grounding device; the filters A and B are connected to the air suction port of the vacuum pump through a hose;

[0008] One of the two guide rails is equipped with a liquid level relay B, a liquid level relay A and a liquid level relay C in sequence from left to right; the other guide rail is equipped with an AC contactor B, an AC contactor A and an AC contactor C in sequence from left to right;

[0009] A liquid level detector A is provided in the water sample container; the liquid level detector A is connected to the liquid level relay A via a signal cable;

[0010] The liquid level relay A is connected to the input end of the AC contactor A via a control cable.

[0011] The vacuum pump is also connected to the output end of the AC contactor A; and filter membranes are provided in both the filter A and the filter B.

[0012] The two guide rails are horizontally installed on the upper partition board, with a distance of 15 cm between the two guide rails, and both ends of each guide rail are fixed to the upper partition board by screws.

[0013] The liquid level detector B and the liquid level detector C are respectively inserted into the filter membrane of the filter A and the filter B at a position of cm above the filter membrane; the liquid level detector B and the liquid level detector C are respectively connected to one end of the liquid level relay B and the liquid level relay C through a signal cable.

[0014] The other end of the liquid level relay B is connected to the input end of the AC contactor B, and the output end of the AC contactor B is connected to the solenoid valve A; the other end of the liquid level relay C is connected to the input end of the AC contactor C, and the output end of the AC contactor C is connected to the solenoid valve B.

[0015] The AC contactor B and the AC contactor C are also connected to the output end of the AC contactor A via a connecting cable.

[0016] The left pipeline of the pipeline is set at 1 cm just above the filter A, and the right pipeline of the pipeline 15 is set at 1 cm just above the filter B.

[0017] The filtering method of any one of the laboratory water treatment filtering devices as described above comprises the following steps:

[0018] Step 1: Pour the water sample to be filtered into the water sample container at one time, adjust the manual valve A and manual valve B to 50% opening, turn on the power switch, manually start the vacuum pump, and draw negative pressure on filter A and filter B to establish a pressure difference on both sides of the filter membrane;

[0019] Step 2: Since there is water in the water sample container during step 1, the liquid level detector A automatically and continuously detects the liquid level in the water sample container; when the liquid level in the water sample container meets the standard value, the liquid level detector A automatically sends a water signal and transmits it to the liquid level relay A, so that the liquid level relay A automatically sends a closing signal to close the AC contactor A and supply power to the device; at the same time, the liquid level detector B and the liquid level detector C continuously monitor the water level signals of the filter A and the filter B;

[0020] Step 2.1: When the liquid level detector B and the liquid level detector C detect the signal of low water level of filter A and filter B, they are transmitted to the liquid level relay B and the liquid level relay C respectively, so as to automatically close the AC contactor B and the AC contactor C respectively, and supply power to the solenoid valve A and the solenoid valve B respectively, so that the solenoid valve A and the solenoid valve B are opened, and the filter A and the filter B are automatically replenished with water respectively; the system enters the automatic operation state, realizes automatic water replenishment and automatic filtration, until the filtration work is completed;

[0021] Step 2.2: When the liquid level detector B and the liquid level detector C detect the signal of high water level of filter A and filter B, AC contactor B and AC contactor C are automatically disconnected and the power is cut off, solenoid valve A and solenoid valve B are closed, and water supply to filter A and filter B is stopped;

[0022] Step 3: When the water in the water sample container is filtered, the liquid level detector automatically and continuously detects the liquid level height in the water sample container; the water level in the water sample container will drop to the bottom of the container, and the liquid level detector automatically sends a low liquid level signal and transmits it to the liquid level relay A, thereby automatically opening the AC contactor A, disconnecting the power supply of the device, and automatically stopping the vacuum pump, and the AC contactors B and C are automatically opened, and all components of the device automatically stop.

[0023] Beneficial effects of the present invention:

[0024] [1] The laboratory water treatment filtration device designed by the present invention is a passive automatic water replenishment device, which can automatically start replenishing water when the water level in the filter drops to the set water level, and automatically stop replenishing water when the water level in the filter rises to the set water level, so as to automatically maintain the water level of the filter and realize unattended automatic filtration. During the working process, the experimental analysts can carry out other work without staying by the filtration device. After the personnel get off work, the device can still continue to work, and after the filtration is completed, the device can automatically stop and automatically cut off the power to ensure safety;

[0025] [2] The water replenishment device designed by the present invention can realize the simultaneous filtration of the same water sample by two filtration devices, thereby increasing the filtration speed, shortening the time required for water sample processing, and thus effectively reducing the total time required for experimental analysis and improving work efficiency;

[0026] [3] The present invention is provided with a water shortage protection device, which can automatically cut off the power supply and stop the operation of the device when the water sample in the water sample bucket is filtered out, effectively avoiding the safety risk of running without water after the water sample is filtered out;

[0027] [4] The filtration device designed in the present invention adopts a negative pressure dual-channel passive automatic water replenishment function. By pumping negative pressure, a certain pressure difference is established on both sides of the filter membrane, thereby increasing the speed at which the water sample passes through the filter membrane and shortening the time required for water treatment.

[0028] [5] The present invention does not require the installation of water pumps and other equipment, and can perform passive automatic water replenishment through gravity, thereby reducing production costs and achieving good economic benefits;

[0029] [6] The present invention can effectively reduce the labor intensity of workers and improve work efficiency.

[0030] [7] A grounding device is also provided in the device of the present invention to ensure the safety of electricity use and eliminate the risk of electric shock to personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of a laboratory water treatment and filtration device according to the present invention;

[0032] Figure 2 A flow chart of a filtration method for a laboratory water treatment filtration device according to the present invention

[0033] Among them: 1. Double-layer support device, 2. Liquid level relay A, 3. Liquid level relay B, 4. Liquid level relay C, 5. AC contactor A, 6. AC contactor B, 7. AC contactor C, 8. Liquid level detector A, 9. Liquid level detector B, 10. Liquid level detector C, 11. Solenoid valve A, 12. Solenoid valve B, 13. Manual valve A, 14. Manual valve B, 15. Pipeline, 16. Water sample container, 17. Three-way connector, 18. Filter A, 19. Filter B, 20. Hose, 21. Vacuum pump, 22. Connecting cable, 23. Control cable, 24. Grounding device, 25. Signal cable. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0035] A laboratory water treatment and filtering device, comprising: a water sample container 16, a double-layer support device 1, an AC contactor A5, an AC contactor B6, an AC contactor C7, a grounding device 24, two guide rails, a filter A18, a filter B19, a vacuum pump 21, a hose 20, a manual valve A13, a manual valve B14, a solenoid valve A11, a solenoid valve B12, a three-way connector 17, a liquid level relay B3, a liquid level relay A2, a liquid level relay C4 and a plurality of signal cables 25 and a control cable 23;

[0036] The top of the double-layer support device 1 is an upper partition, on which a water sample container 16 and two guide rails are respectively arranged, and the lower part of the water sample container 16 is connected to one end of a pipe 15; a three-way joint 17 is arranged at the other end of the pipe 15, and the three-way joint 17 divides the pipe 15 into a left pipe and a right pipe, wherein a manual valve A13 and a solenoid valve A11 are respectively arranged on the left pipe of the pipe 15; a manual valve B14 and a solenoid valve B12 are respectively arranged on the right pipe of the pipe 15; the bottom of the double-layer support device 1 is a lower partition; Filter A18 and filter B19 are respectively arranged on the left and right sides of the lower partition; the left pipeline of the pipeline 15 is arranged above the filter A18; the right pipeline of the pipeline 15 is arranged above the filter B19, and the lower partition is also connected to a grounding device 24; the filter A18 and the filter B19 are connected to the suction port of the vacuum pump 21 through a hose 20, so that a vacuum pump 21 can simultaneously establish negative pressure inside the filter A18 and the filter B19, increase the pressure difference on both sides of the filter membrane, and improve the filtration speed.

[0037] One of the two guide rails is equipped with a liquid level relay B3, a liquid level relay A2 and a liquid level relay C4 in sequence from left to right; the other guide rail is equipped with an AC contactor B6, an AC contactor A5 and an AC contactor C7 in sequence from left to right;

[0038] The water sample container 16 is provided with a liquid level detector A8; the liquid level detector A8 is connected to the liquid level relay A2 via a signal cable 25;

[0039] The liquid level relay A2 is connected to the input end of the AC contactor A5 via a control cable 23, and the AC contactor A5 is also connected to a 220V AC power supply.

[0040] The vacuum pump 21 is also connected to the output end of the AC contactor A5; filter membranes are provided in the filter A18 and the filter B19.

[0041] The two guide rails are horizontally installed on the upper partition board, with a distance of 15 cm between the two guide rails, and both ends of each guide rail are fixed to the upper partition board by screws.

[0042] The liquid level detector B9 and the liquid level detector C10 are respectively inserted 1 cm above the filter membranes of the filters A18 and B19; the liquid level detector B9 and the liquid level detector C10 are respectively connected to one end of the liquid level relay B3 and the liquid level relay C4 through a signal cable 25.

[0043] The other end of the liquid level relay B3 is connected to the input end of the AC contactor B6, and the output end of the AC contactor B6 is connected to the solenoid valve A11; the other end of the liquid level relay C4 is connected to the input end of the AC contactor C7, and the output end of the AC contactor C7 is connected to the solenoid valve B12.

[0044] The AC contactor B6 and the AC contactor C7 are also connected to the output end of the AC contactor A5 via a connecting cable 22 .

[0045] The left channel of the pipeline 15 is arranged 1 cm above the filter A18, and the right channel of the pipeline 15 is arranged 1 cm above the filter B19.

[0046] like Figure 2 As shown, the filtering method of any of the above-mentioned laboratory water treatment filtering devices comprises the following steps:

[0047] Step 1: Pour the water sample to be filtered into the water sample container 16 at one time, adjust the manual valve 13 and the manual valve 14 to 50% opening, turn on the power switch, manually start the vacuum pump 21, and draw negative pressure on the filter 18 and the filter 19 to establish a pressure difference on both sides of the filter membrane of the filter;

[0048] Step 2: Since there is water in the water sample container 16 during step 1, the liquid level detector 8 automatically and continuously detects the liquid level in the water sample container 16; when the liquid level in the water sample container 16 meets the standard value, the liquid level detector 8 automatically sends a water signal and transmits it to the liquid level relay A2, so that the liquid level relay A2 automatically sends a closing signal to close the AC contactor A5 and supply power to the device; at the same time, the liquid level detector B9 and the liquid level detector C10 continuously monitor the water level signals of the filter A18 and the filter B19;

[0049] Step 2.1: When the liquid level detector B9 and the liquid level detector C10 detect the signal of low water level of filter A18 and filter B19, they are transmitted to the liquid level relay B3 and the liquid level relay C4 respectively, thereby automatically closing the AC contactor B6 and the AC contactor C7 respectively, and supplying power to the solenoid valve A11 and the solenoid valve B12 respectively, so that the solenoid valve A11 and the solenoid valve B12 are opened, and the filter A18 and the filter B19 are automatically replenished with water respectively; the system enters the automatic operation state, realizes automatic water replenishment and automatic filtration, until the filtration work is completed;

[0050] Step 2.2: When the liquid level detector B (9) and the liquid level detector C10 detect the signal that the water level of the filter A18 and the filter B19 is high, the AC contactor B6 and the AC contactor C7 are automatically disconnected and the power is cut off, and the solenoid valve A11 and the solenoid valve B12 are closed, and the water supply to the filter A18 and the filter B19 is stopped;

[0051] Step 3: When the water in the water sample container 16 is filtered, the liquid level detector 8 automatically and continuously detects the liquid level height in the water sample container 16; the water level in the water sample container 16 will drop to the bottom of the container, and the liquid level detector 8 automatically sends a low liquid level signal and transmits it to the liquid level relay A2, thereby automatically opening the AC contactor A5, disconnecting the power supply of the device, and automatically stopping the vacuum pump 21, and the AC contactors B6 and C7 are automatically opened, and all components of the device automatically stop.

[0052] The three liquid level relays described in the present invention are all 220V liquid level relays, the three AC contactors are all normally open AC contactors, the solenoid valve A11 and the solenoid valve B12 are normally closed solenoid valves, which are connected by cables to achieve liquid level detection and control.

[0053] As described above, the liquid level detectors B9 and C10 in the filter A18 and filter B19 transmit the liquid level signal to the liquid level relay B3 and the liquid level relay C4 respectively. The liquid level relay B3 and the liquid level relay C4 control the opening and closing states of the AC contactors B6 and C7 according to the liquid level signal, and then control the switch of the solenoid valve A11 and the solenoid valve B12, so as to realize the automatic water replenishment and automatic stop of water replenishment of the filtration device and maintain the continuous filtration state. When the liquid level of the water sample container 16 drops to the set value (indicating the end of the filtration work), the liquid level detector A8 sends a signal to the liquid level relay A2, and the liquid level relay A2 automatically issues a command to put the AC contactor A5 of the power supply into the open state, and the device automatically stops and is put into the power-off state to ensure safety.

[0054] The present invention is described in detail above with reference to the accompanying drawings and embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. Any content not described in detail in the present invention can adopt the existing technology.

Claims

1. A laboratory water treatment filtration device, characterized in that: include: A water sample container (16), a double-layer support device (1), an AC contactor A (5), an AC contactor B (6), an AC contactor C (7), a grounding device (24), two guide rails, a filter A (18), a filter B (19), a vacuum pump (21), a hose (20), a manual valve A (13), a manual valve B (14), a solenoid valve A (11), a solenoid valve B (12), a three-way connector (17), a liquid level relay B (3), a liquid level relay A (2), a liquid level relay C (4), and a plurality of signal cables (25) and a control cable (23); The top of the double-layer support device (1) is an upper baffle, on which a water sample container (16) and two guide rails are respectively arranged, and the lower part of the water sample container (16) is connected to one end of a pipeline (15); the other end of the pipeline (15) is provided with a three-way joint (17), and the three-way joint (17) divides the pipeline (15) into a left pipeline and a right pipeline, wherein a manual valve A (13) and a solenoid valve A (11) are respectively arranged on the left pipeline of the pipeline (15); and a manual valve B (14) and a solenoid valve B (12) are respectively arranged on the right pipeline of the pipeline (15); the bottom of the double-layer support device (1) is a lower baffle; A filter A (18) and a filter B (19) are respectively arranged on the left and right sides of the lower partition; the left pipeline of the pipeline (15) is arranged above the filter A (18); the right pipeline of the pipeline (15) is arranged above the filter B (19), and the lower partition is also connected to a grounding device (24); the filter A (18) and the filter B (19) are connected to the air extraction port of a vacuum pump (21) via a hose (20); One of the two guide rails is provided with a liquid level relay B (3), a liquid level relay A (2) and a liquid level relay C (4) in sequence from left to right; the other guide rail is provided with an AC contactor B (6), an AC contactor A (5) and an AC contactor C (7) in sequence from left to right; A liquid level detector A (8) is arranged in the water sample container (16); the liquid level detector A (8) is connected to the liquid level relay A (2) via a signal cable (25); The liquid level relay A (2) is connected to the input end of the AC contactor A (5) via a control cable (23), and the AC contactor A (5) is also connected to a 220V AC power supply; The two guide rails are horizontally installed on the upper partition, with a distance of 15 cm between the two guide rails, and both ends of each guide rail are fixed to the upper partition by screws; The liquid level detector B (9) and the liquid level detector C (10) are respectively inserted 1 cm above the filter membranes of the filter A (18) and the filter B (19); the liquid level detector B (9) and the liquid level detector C (10) are respectively connected to one end of the liquid level relay B (3) and the liquid level relay C (4) via a signal cable (25); The other end of the liquid level relay B (3) is connected to the input end of the AC contactor B (6), and the output end of the AC contactor B (6) is connected to the solenoid valve A (11); the other end of the liquid level relay C (4) is connected to the input end of the AC contactor C (7), and the output end of the AC contactor C (7) is connected to the solenoid valve B (12); The AC contactor B (6) and the AC contactor C (7) are also connected to the output end of the AC contactor A (5) via a connecting cable (22); The left channel of the pipeline (15) is arranged 1 cm above the filter A (18), and the right channel of the pipeline (15) is arranged 1 cm above the filter B (19).

2. A laboratory water treatment filtration device as claimed in claim 1, characterized in that: The vacuum pump (21) is also connected to the output end of the AC contactor A (5); and filter membranes are provided in both the filter A (18) and the filter B (19).

3. A filtration method for a laboratory water treatment filtration device according to any one of claims 1 to 2, characterized in that: The steps include: Step 1: Pour the water sample to be filtered into the water sample container (16) at one time, adjust the manual valve A (13) and the manual valve B (14) to 50% opening, turn on the power switch, manually start the vacuum pump (21), and draw negative pressure on the filter A (18) and the filter B (19) to establish a pressure difference on both sides of the filter membrane; Step 2: Since there is water in the water sample container (16) during step 1, the liquid level detector A (8) automatically and continuously detects the liquid level in the water sample container (16); when the liquid level in the water sample container (16) meets the standard value, the liquid level detector A (8) automatically sends a water signal and transmits it to the liquid level relay A (2), so that the liquid level relay A (2) automatically sends a closing signal to close the AC contactor A (5) and supply power to the device; at the same time, the liquid level detector B (9) and the liquid level detector C (10) continuously monitor the water level signals of the filter A (18) and the filter B (19); Step 2.1: When the liquid level detector B (9) and the liquid level detector C (10) detect the signal that the water level of the filter A (18) and the filter B (19) is low, the signal is transmitted to the liquid level relay B (3) and the liquid level relay C (4), respectively, so that the AC contactor B (6) and the AC contactor C (7) are automatically closed, and the electromagnetic valve A (11) and the electromagnetic valve B (12) are powered respectively, so that the electromagnetic valve A (11) and the electromagnetic valve B (12) are opened, and the filter A (18) and the filter B (19) are automatically replenished with water respectively; the system enters the automatic operation state, realizes automatic water replenishment and automatic filtration, until the filtration work is completed; Step 2.2: When the liquid level detector B (9) and the liquid level detector C (10) detect the signal that the water level of the filter A (18) and the filter B (19) is high, the AC contactor B (6) and the AC contactor C (7) are automatically disconnected to cut off the power supply, and the solenoid valve A (11) and the solenoid valve B (12) are closed, and the water supply to the filter A (18) and the filter B (19) is stopped; Step 3: When the water in the water sample container (16) is filtered, the liquid level detector (8) automatically and continuously detects the height of the liquid level in the water sample container (16); the water level in the water sample container (16) drops to the bottom of the container, and the liquid level detector (8) automatically sends a low liquid level signal and transmits it to the liquid level relay A (2), thereby automatically opening the AC contactor A (5), disconnecting the power supply of the device, and the vacuum pump (21) automatically stops, and the AC contactor B (6) and AC contactor C (7) are automatically opened, and the various components of the device automatically stop.

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