Automatic backwashing pretreatment system for water quality on-line instrument

Abstract

The utility model discloses and provides an automatic backwashing pretreatment system for a water quality on-line instrument, which comprises a sample inlet, a washing water inlet, a normal-pressure drain outlet, an electric control box and a water quality on-line analyzer, the on-line water quality analyzer sends sampling signals to the electrical control box to control the on-off states of the first pneumatic three-way valve and the second pneumatic three-way valve, and the flushing state is maintained in a normal state, so that the workload of maintenance and cleaning is greatly reduced, algae generation in the system is greatly reduced, the cleanliness is improved, and the service life of the system is prolonged. And during sampling, the flushing state is closed, a sample enters the sampling flow cell after passing through the filter to be sampled and analyzed, automatic control is achieved, and time and worry are saved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of flushing systems, and particularly to an automatic backwashing pretreatment system for on-line water quality meters. Background Art

[0002] The sample pretreatment system is designed and manufactured for on-line water quality analysis meters for factory sewage monitoring. The sample pretreatment system is a system that connects one or more on-line analytical instruments with the source fluid and the discharge point. Its function is to ensure that the analyzer obtains a representative sample within the shortest lag time, and the temperature, pressure, flow rate, and cleanliness of the sample are suitable for the operating conditions required by the analyzer.

[0003] On-line water quality analyzers are classified into COD, TOC, ammonia nitrogen, total phosphorus, total nitrogen, and PH according to different monitoring items. On-line water quality analysis meters are generally installed at the sewage discharge outlet or the water intake of a drinking water plant. An outstanding problem encountered during their operation is the blockage, pollution, and interference with the measurement results caused by insoluble suspended solids and colloids in the water. Usually, the measure taken is to install a filter on the sampling pipeline before the sample enters the analyzer. The disadvantages of traditional filters are twofold. The first is that the filtering capacity is limited, it is easy to clog and fail, and the maintenance and cleaning workload is large. The second is that the filtration is not thorough, and microorganisms such as algal spores and bacteria attached to the filter and the pipe wall are prone to grow and reproduce to form algae, bringing a series of troubles and problems. Utility Model Content

[0004] The present disclosure provides an automatic backwashing pretreatment system for on-line water quality meters to solve one of the technical problems recognized by the inventors.

[0005] The present disclosure provides an automatic backwashing pretreatment system for on-line water quality meters, including a sample inlet, a flushing water inlet, an atmospheric pressure sewage outlet, an electrical control box, and an on-line water quality analyzer. The flushing water inlet is connected to a first pneumatic three-way valve through a first water pipe. The sample inlet is connected to a second pneumatic three-way valve through a second water pipe. One end of the first pneumatic three-way valve is connected to the second pneumatic three-way valve through a third water pipe. A filter is provided on the third water pipe. The second pneumatic three-way valve is connected to the atmospheric pressure sewage outlet. The first pneumatic three-way valve is connected to the water inlet of a sampling flow-through cell. An overflow port is provided at the upper part of the sampling flow-through cell. The overflow port is connected to the atmospheric pressure sewage outlet through a fourth water pipe. The on-line water quality analyzer is connected to the sampling flow-through cell through an analyzer sampling pipe. The electrical control box is connected to the first pneumatic three-way valve and the second pneumatic three-way valve. The electrical control box is connected to the on-line water quality analyzer through an electric wire.

[0006] Preferably, it further includes a compressed air inlet and an electromagnetic control valve. The compressed air inlet is connected to the electromagnetic control valve through a first air pipe. The electromagnetic control valve is connected to the electrical control box through an electric wire. The electromagnetic control valve is respectively connected to the first pneumatic three-way valve and the second pneumatic three-way valve through a second air pipe.

[0007] Preferably, a first ball valve and an air filter pressure reducing valve are provided on the first air pipe.

[0008] Preferably, a second ball valve and a first liquid pressure reducing valve are provided on the first water pipe.

[0009] Preferably, a third ball valve and a second liquid pressure reducing valve are provided on the second water pipe.

[0010] Preferably, a sampling port is provided at the bottom of the sampling flow cell, and a fourth ball valve is provided at the sampling port.

[0011] Preferably, the sampling flow cell is made of transparent PC material.

[0012] Preferably, the electrical control box is an explosion-proof electrical control box.

[0013] Preferably, the electromagnetic control valve is an explosion-proof electromagnetic control valve.

[0014] The beneficial effects of the present disclosure mainly lie in that: the utility model sends a sampling signal to the electrical control box through the water quality on-line analyzer to control the on-off states of the first pneumatic three-way valve and the second pneumatic three-way valve. In the normal state, the flushing state is maintained, which greatly reduces the workload of maintenance and cleaning, and greatly reduces the generation of algae in the system, improves the cleanliness, reduces the interference to the water quality on-line analyzer. When sampling, the flushing state is turned off, and the sample enters the sampling flow cell through the filter for sampling and analysis, with automatic control, saving time and worry.

[0015] It should be understood that both the foregoing general description and the following detailed description are for the purpose of illustration and example only and are not necessarily restrictive of the present disclosure. The accompanying drawings incorporated in and constituting a part of the specification illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1Schematic diagram of the automatic backwashing pretreatment system according to the embodiments of the present disclosure;

[0018] Icons: 1 - Compressed air inlet; 2 - Flushing water inlet; 3 - Sample inlet; 4 - Atmospheric pressure sewage outlet; 5 - Electrical control box; 6 - On-line water quality analyzer; 7 - Electromagnetic control valve; 8 - Filter; 9 - Sampling flow cell; 10 - First pneumatic three-way valve; 11 - Second pneumatic three-way valve; 12 - First water pipe; 13 - Second water pipe; 14 - Third water pipe; 15 - Fourth water pipe; 16 - First air pipe; 17 - Second air pipe; 18 - First ball valve; 19 - Air filter pressure reducing valve; 20 - Second ball valve; 21 - First liquid pressure reducing valve; 22 - Third ball valve; 23 - Second liquid pressure reducing valve; 24 - Fourth ball valve; 25 - Overflow port. Detailed implementation manners

[0019] The technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present disclosure.

[0020] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0021] In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present disclosure. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0022] In the description of the present disclosure, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0023] Embodiment

[0024] As Figure 1As shown in the figure, this embodiment provides an automatic backwashing pretreatment system for an on-line water quality meter, which includes a sample inlet 3, a flushing water inlet 2, a compressed air inlet 1, an atmospheric pressure sewage outlet 4, an electrical control box 5, an electromagnetic control valve 7, and an on-line water quality analyzer 6.

[0025] Among them, the electrical control box 5 is respectively connected to the electromagnetic control valve 7 and the on-line water quality analyzer 6 through wires. The on-line water quality analyzer 6 sends a sampling signal to the electrical control box 5. After receiving the sampling signal, the electrical control box 5 controls the electromagnetic control valve 7 to work. One end of the electromagnetic control valve 7 is connected to the compressed air inlet 1 through a first air pipe 16. The first air pipe 16 is a stainless steel tube. The compressed air outlet end of the electromagnetic control valve 7 is respectively connected to a first pneumatic three-way valve 10 and a second pneumatic three-way valve 11 through a second air pipe 17. The electromagnetic control valve 7 receives the control signal from the electrical control box 5 and controls the on-off states of the first pneumatic three-way valve 10 and the second pneumatic three-way valve 11. The flushing water inlet 2 is connected to the first pneumatic three-way valve 10 through a first water pipe 12. The sample inlet 3 is connected to the second pneumatic three-way valve 11 through a second water pipe 13. One end of the first pneumatic three-way valve 10 is connected to the second pneumatic three-way valve 11 through a third water pipe 14. A filter 8 is provided on the third water pipe 14. The second pneumatic three-way valve 11 is connected to the atmospheric pressure sewage outlet 4. The first pneumatic three-way valve 10 is connected to the water inlet of a sampling flow cell 9. An overflow port 25 is provided on the upper part of the sampling flow cell 9. The overflow port 25 is connected to the atmospheric pressure sewage outlet 4 through a fourth water pipe 15. The on-line water quality analyzer 6 is connected to the sampling flow cell 9 through an analyzer sampling pipe.

[0026] In this embodiment, the automatic backwashing pretreatment system includes a cleaning state and a sampling state. In the normal state, it is in the cleaning state. At this time, the first pneumatic three-way valve 10 is opened in the direction of the cleaning water inlet and the filter 8, and closed in the direction of the sampling flow cell 9. The second pneumatic three-way valve 11 is closed in the direction of the sample inlet, and opened in the direction of the filter 8 and the atmospheric pressure drain port 4. The cleaning water enters through the cleaning water inlet, flows through the first pneumatic three-way valve 10 and the filter 8, and then is discharged from the atmospheric pressure drain port 4. The sample water does not enter the system. At this time, the cleaning water continuously flushes the filter 8 for cleaning. When the water quality on-line analyzer 6 sends a sampling signal to the electrical control box 5, the electrical control box 5 sends a control instruction to the electromagnetic control valve 7, and the electromagnetic control valve 7 switches the valve. At this time, the first pneumatic three-way valve 10 is closed in the direction of the cleaning water inlet, and opened in the direction of the sample flow cell and the filter 8. The second pneumatic three-way valve 11 is opened in the direction of the sample inlet 3 and the filter 8, and closed in the direction of the atmospheric pressure drain port 4. The sample water enters from the sample inlet 3, flows through the filter 8 and then enters the sample flow cell. The water quality on-line analyzer 6 extracts part of the sample from the sample flow cell through the analysis sampling pipe, and the excess sample flows out from the overflow port 25 and enters the atmospheric pressure drain port 4 to be discharged. After sampling is completed, the water quality on-line analyzer 6 stops sending the sampling signal to the electrical control box 5, and the electrical control box 5 sends a control instruction to the electromagnetic control valve 7, and the valve of the electromagnetic control valve 7 switches back to the cleaning state.

[0027] Further, a first ball valve 18 and an air filter pressure reducing valve 19 are provided on the first air pipe 16. The first ball valve 18 controls the on-off of the compressed air inlet 1. The function of the air filter pressure reducing valve 19 is to adjust the pressure of the compressed air and filter the impurities and moisture in the compressed air to prevent clogging of the pneumatic components.

[0028] Further, a second ball valve 20 and a first liquid pressure reducing valve 21 are provided on the first water pipe 12. The second ball valve 20 and the first liquid pressure reducing valve 21 can adjust the pressure of the flushing water.

[0029] Further, a third ball valve 22 and a second liquid pressure reducing valve 23 are provided on the second water pipe 13. The third ball valve 22 and the second liquid pressure reducing valve 23 can adjust the pressure of the sample inlet 3.

[0030] Further, a sampling port is provided at the bottom of the sampling flow cell 9, and a fourth ball valve 24 is provided at the sampling port. By providing the fourth ball valve 24, it is convenient to retain the water sample.

[0031] Further, the sampling flow cell 9 is made of transparent PC material. Through the sampling flow cell 9 made of transparent PC material, the situation of the water sample can be observed intuitively.

[0032] Further, the electrical control box 5 is an explosion-proof electrical control box. Using the explosion-proof electrical control box 5 meets the explosion-proof requirements of some chemical sites.

[0033] Furthermore, the electromagnetic control valve 7 is an explosion-proof electromagnetic control valve 7. The use of the explosion-proof electromagnetic control valve 7 meets the explosion-proof requirements of some chemical sites.

[0034] The working principle of the present utility model: This automatic backwashing pretreatment system includes a cleaning state and a sampling state. In the normal state, it is in the cleaning state. At this time, the cleaning water inlet of the first pneumatic three-way valve 10 is opened in the direction of the filter 8, and the direction of the sampling flow cell 9 is closed. The sample inlet direction of the second pneumatic three-way valve 11 is closed, and the filter 8 and the normal pressure sewage discharge port 4 are opened. The cleaning water enters through the cleaning water inlet, flows through the first pneumatic three-way valve 10 and the filter 8, and then is discharged from the normal pressure sewage discharge port 4. The sample water does not enter the system. At this time, the cleaning water continuously flushes the filter 8 for cleaning. When the water quality on-line analyzer 6 sends a sampling signal to the electrical control box 5, the electrical control box 5 sends a control instruction to the electromagnetic control valve 7, and the electromagnetic control valve 7 performs valve switching. At this time, the cleaning water inlet direction of the first pneumatic three-way valve 10 is closed, and the sample flow cell and the filter 8 are opened. The sample inlet 3 and the filter 8 of the second pneumatic three-way valve 11 are opened, and the normal pressure sewage discharge port 4 is closed. The sample water enters from the sample inlet 3, flows through the filter 8 and then enters the sample flow cell. The water quality on-line analyzer 6 extracts part of the sample from the sample flow cell through the analysis sampling pipe, and the excess sample flows out from the overflow port 25 and enters the normal pressure sewage discharge port 4 to be discharged. After the sampling is completed, the water quality on-line analyzer 6 stops sending the sampling signal to the electrical control box 5, and the electrical control box 5 sends a control instruction to the electromagnetic control valve 7, and the valve switching of the electromagnetic control valve 7 returns to the cleaning state.

[0035] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present disclosure, and are not intended to limit them; Although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. An automatic backwash pretreatment system for water quality online instruments, characterized in that: include: A sample inlet, a flushing water inlet, a normal-pressure sewage outlet, an electrical control box and an online water quality analyzer, wherein the flushing water inlet is connected to a first pneumatic three-way valve through a first water pipe, the sample inlet is connected to a second pneumatic three-way valve through a second water pipe, one end of the first pneumatic three-way valve is connected to the second pneumatic three-way valve through a third water pipe, a filter is provided on the third water pipe, the second pneumatic three-way valve is connected to the normal-pressure sewage outlet, the first pneumatic three-way valve is connected to a water inlet of a sampling circulation pool, an overflow is provided on the upper part of the sampling circulation pool, the overflow is connected to the normal-pressure sewage outlet through a fourth water pipe, the online water quality analyzer is connected to the sampling circulation pool through an analyzer sampling tube, the electrical control box is connected to the first pneumatic three-way valve and the second pneumatic three-way valve, and the electrical control box is connected to the online water quality analyzer through electric wires.

2. The automatic backwash pretreatment system for water quality online instrument according to claim 1 is characterized in that: It also includes a compressed air inlet and an electromagnetic control valve, wherein the compressed air inlet is connected to the electromagnetic control valve through a first air pipe, the electromagnetic control valve is connected to the electrical control box through an electric wire, and the electromagnetic control valve is connected to the first pneumatic three-way valve and the second pneumatic three-way valve respectively through a second air pipe.

3. The automatic backwash pretreatment system for water quality online instrument according to claim 2 is characterized in that: The first air pipe is provided with a first ball valve and an air filtering pressure reducing valve.

4. The automatic backwash pretreatment system for water quality online instrument according to claim 1 is characterized in that: The first water pipe is provided with a second ball valve and a first liquid pressure reducing valve.

5. The automatic backwash pretreatment system for water quality online instrument according to claim 1 is characterized in that: The second water pipe is provided with a third ball valve and a second liquid pressure reducing valve.

6. The automatic backwash pretreatment system for water quality online instrument according to claim 1 is characterized in that: A sampling port is provided at the bottom of the sampling circulation pool, and a fourth ball valve is provided at the sampling port.

7. The automatic backwash pretreatment system for water quality online instrument according to claim 1 is characterized in that: The sampling circulation pool is made of transparent PC material.

8. The automatic backwash pretreatment system for water quality online instrument according to claim 2 is characterized in that: The electrical control box is an explosion-proof electrical control box.

9. The automatic backwash pretreatment system for water quality online instrument according to claim 2, characterized in that: The electromagnetic control valve is an explosion-proof electromagnetic control valve.

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