Pretreatment device for water quality analysis system

Abstract

The utility model discloses a pretreatment device for a water quality analysis system, which comprises a pretreatment box for storing sample water to be analyzed, a water inlet is arranged on the bottom side wall of the pretreatment box, the water inlet is connected with a sample water inlet through a pipeline, and the pipeline of the sample water inlet is connected with a manual sampling port; the at least two layers of filtering structures are fixed on the inner circumferential wall of the pretreatment box in parallel up and down, a water outlet is formed in the upper end of the pretreatment box and located above the filtering structure on the uppermost layer, and the water outlet is connected with an analyzer sampling port through a pipeline; one backwashing spray head is correspondingly arranged above each layer of filtering structure; and the switch valves are respectively arranged on the pipeline of the sample water inlet, the pipeline of the sampling port of the analyzer, the pipeline connected with the backwashing spray head and the pipeline connected with the manual sampling port. Instrument sampling and manual sampling can be facilitated, meanwhile, the situation that an instrument cannot conduct detection due to the water quality sample introduction blocking problem of an analysis system is reduced, and reliable guarantee is provided for stable operation of the instrument.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and in particular relates to a pretreatment device for a water quality analysis system. Background Art

[0002] In the field of online automatic water quality monitoring, due to the varying water quality conditions, especially when testing wastewater generated by petrochemical plants, problems such as frequent failures and a sudden reduction in service life are common. This is mainly due to the poor quality of the measured water, which prevents the instrument from operating for long periods of time. Currently, there are also devices that pre-treat water quality for monitoring, filtering impurities in the wastewater in advance. However, these pre-treatment devices still suffer from frequent clogging of the filter and low treatment efficiency. They also have problems such as inconvenience in manual sampling or sampling with analytical instruments due to unreasonable structures. Utility Model Content

[0003] The purpose of the utility model is to provide a pretreatment device which can facilitate instrument sampling and manual sampling, reduce the problem of instrument failure due to water quality sampling blockage in the analysis system, and provide reliable guarantee for the stable operation of the instrument.

[0004] In order to solve the above problems, the utility model provides a pretreatment device for a water quality analysis system, comprising a pretreatment box for storing sample water to be analyzed, a water inlet being provided on the bottom side wall of the pretreatment box, the water inlet being connected to a sample water inlet through a pipe, and the pipe of the sample water inlet being connected to an artificial sampling port; at least two layers of filtering structures being fixed on the inner circumferential wall of the pretreatment box in parallel up and down, a water outlet being provided at the upper end of the pretreatment box and being located above the uppermost layer of filtering structure, and the water outlet being connected to the sampling port of an analyzer through a pipe; a backwash nozzle, a backwash nozzle being correspondingly provided above each layer of filtering structure; and switch valves being respectively provided on the pipe of the sample water inlet, the pipe of the analyzer sampling port, the pipe connected to the backwash nozzle, and the pipe connected to the artificial sampling port.

[0005] The pretreatment device of the utility model is provided with a multi-stage filtering structure, which physically filters the water sampled by the analyzer, removes the dirty media in the sample water, and retains the components that need to be analyzed. The water outlet is located above the uppermost filtering structure, and the analyzer sampling port connected to the water outlet can obtain the filtered water sample of the uppermost layer; at the same time, a backwash nozzle is provided to clean the filtering structure, prevent blockage, and improve the processing efficiency. In addition, the on-off valve is used to control the on-off of the manual sampling port and the analyzer sampling port respectively, so that it is convenient to select manual or analytical instrument sampling.

[0006] In some embodiments, an overflow port is further provided at the upper end of the pretreatment tank, and the overflow port is positioned higher than the water outlet. Thus, the provision of the overflow port can ensure a stable liquid level and prevent excessive sample water to be analyzed from being injected through the water inlet and overflowing the pretreatment tank.

[0007] In some embodiments, a manifold is provided below the pretreatment tank, an overflow pipe is connected between the overflow port and the manifold, a drain port is provided at the bottom of the pretreatment tank and communicates with the manifold, and a valve is provided on the pipe connected to the drain port. Thus, by providing the drain port and the manifold, when a backwash nozzle is used to flush the filter structure, dirty water can be discharged from the bottom of the pretreatment tank through the drain port and discharged through the manifold together with the sample water flowing out of the overflow pipe.

[0008] In some embodiments, the pretreatment tank includes a cylindrical portion and a conical portion connected to the bottom end of the cylindrical portion, the sewage outlet is located at the bottom end of the conical portion, and the filtration structure is disposed within the cylindrical portion. Thus, the conical portion facilitates the discharge of dirty sewage from the sewage outlet.

[0009] In some embodiments, a water collection container is provided directly below the manual sampling port. The water collection container is connected to a manifold, one end of which is closed and the other end of which is provided with a sewage discharge outlet. Thus, during manual sampling, the water collection container can catch sample water dripping from the manual sampling port, preventing it from overflowing and contaminating the ground.

[0010] In some embodiments, the filter structure is detachably mounted on the inner peripheral wall of the pre-treatment tank, thereby facilitating replacement or removal of the filter structure for thorough cleaning.

[0011] In some embodiments, the filtration structure is a filter mesh, which uses an ultrafiltration membrane.

[0012] In some embodiments, the backwash nozzle is connected to the backwash water inlet via a pipe, and a switch valve is also provided on the pipe. Thus, by controlling the switch valve, the backwash working mode can be achieved.

[0013] In some embodiments, the on / off valves on the sample water inlet pipe, the pipe to the analyzer sampling port, the pipe connected to the backwash nozzle, and the pipe to the sewage outlet are all solenoid valves. The on / off valve on the pipe to the manual sampling port is a manual valve. The solenoid valves are electrically connected to a controller. This allows the controller to automatically control the opening and closing of the analyzer sampling port and the backwash pump head, thereby enabling selection of both automatic sampling and analysis and backwash operating modes, improving the level of intelligence.

[0014] In some embodiments, a water tank cover is provided on the top of the pre-treatment tank, thereby facilitating dust prevention of the pre-treatment tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a pretreatment device for a water quality analysis system according to one embodiment of the present invention.

[0016] In the picture:

[0017] 1. Pretreatment tank; 11. Water inlet; 12. Sample water inlet; 13. Manual sampling port; 14. Water outlet; 15. Analyzer sampling port; 16. Overflow port; 17. Overflow pipe; 18. Cylindrical part; 19. Conical part; 191. Sewage outlet; 110. Water tank cover; 2. Filter structure; 21. First-stage filter screen; 22. Second-stage filter screen; 3. Backwash nozzle; 31. Backwash water inlet; 4. On / off valve; 5. Confluence pipe; 51. Sewage confluence discharge port; 6. Water receiving container. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0020] Figure 1 The figure schematically shows a pre-processing device for a water quality analysis system according to an embodiment of the present invention. Figure 1As shown, the device includes a pretreatment box 1 for storing sample water to be analyzed, a water inlet 11 is provided on the bottom side wall of the pretreatment box 1, the water inlet 11 is connected to a sample water inlet 12 through a pipe, and the pipe of the sample water inlet 12 is connected to an artificial sampling port 13; at least two layers of filter structures 2 are fixed on the inner wall of the pretreatment box 1 in parallel up and down, a water outlet 14 is provided at the upper end of the pretreatment box 1 and is located above the uppermost filter structure 2, and the water outlet 14 is connected to an analyzer sampling port 15 through a pipe; a backwash nozzle 3, a backwash nozzle 3 is correspondingly provided above each layer of the filter structure 2; a switch valve 4 is respectively provided on the pipe of the sample water inlet 12, the pipe of the analyzer sampling port 15, the pipe connected to the backwash nozzle 3, and the pipe connected to the artificial sampling port 13. The sample water to be analyzed is continuously introduced from the sample water inlet 12 so that the water level of the sample water exceeds the uppermost filter structure and is connected to the water quality analysis system through the analyzer sampling port 15, providing an online monitoring test environment for the water quality analysis system.

[0021] The multi-stage filtration structure 2 uses a filter screen and an ultrafiltration membrane. In an actual embodiment, for example, a two-stage filtration structure 2 is used, which includes a first-stage filter screen 21 and a second-stage filter screen 22. The water sampled by the analyzer is physically filtered to remove the dirty media in the sample water and retain the components that need to be analyzed. The water outlet 14 is located above the topmost filter structure 2 (in this case, above the second-stage filter screen 22). The analyzer sampling port 15 connected to the water outlet 14 can obtain the filtered water sample of the top layer; at the same time, a backwash nozzle 3 is provided to clean the filter structure 2, prevent blockage, and improve processing efficiency. In addition, the manual sampling port 13 and the analyzer sampling port 15 are respectively controlled by the switch valve 4 to facilitate the selection of manual or analytical instrument sampling. In a preferred embodiment, the filter structure 2 is detachably mounted on the inner wall of the pretreatment box 1. As a result, it is convenient to replace or remove the filter structure 2 for thorough cleaning.

[0022] In a preferred embodiment, an overflow port 16 is further provided at the upper end of the pretreatment tank 1. The overflow port 16 is positioned higher than the water outlet 14. Thus, the provision of the overflow port 16 ensures a stable liquid level and prevents excessive sample water to be analyzed from being injected through the water inlet 11 and overflowing the pretreatment tank 1.

[0023] In this embodiment, a manifold 5 is provided below the pretreatment tank 1, an overflow pipe 17 is connected between the overflow port 16 and the manifold 5, a drain port 191 is provided at the bottom end of the pretreatment tank 1, and the pipe connected to the drain port 191 is provided with an on-off valve 4. Thus, by providing the drain port 191 and the manifold 5, when the backwash nozzle 3 is used to flush the filter structure 2, dirty sewage can be discharged from the bottom of the pretreatment tank 1 through the drain port 191 and discharged through the manifold 5 together with the sample water flowing out of the overflow pipe 17.

[0024] Furthermore, the backwash nozzle 3 is connected to a backwash water inlet 31 via a pipeline, and the pipeline is also provided with a switch valve 4. Thus, by controlling the switch valve 4, the backwash working mode can be achieved.

[0025] Furthermore, the switch valves 4 provided on the pipes for the sample water inlet 12, the pipes for the analyzer sampling port 15, the pipes connected to the backwash nozzle 3, and the pipes connected to the sewage outlet 191 are all solenoid valves. The switch valve 4 provided on the pipe for the manual sampling port 13 is a manual valve, and the solenoid valves are electrically connected to the controller. Thus, the controller can automatically control the opening and closing of the analyzer sampling port 15 and the opening and closing of the backwash pump head, thereby enabling the selection of two operating modes: automatic sampling and analysis and backwashing, and improving the level of intelligence. The controller can be a programmable controller. The manual valve can be used to conveniently control the opening or closing of the manual sampling port 13.

[0026] In this embodiment, the pretreatment box 1 includes a cylindrical portion 18 and a conical portion 19 connected to the bottom end of the cylindrical portion 18. The sewage outlet 191 is provided at the bottom end of the conical portion 19, and the filtering structure 2 is provided in the cylindrical portion 18. Thus, through the setting of the conical portion 19, dirty sewage can be easily discharged from the sewage outlet 191, which is conducive to draining the sewage.

[0027] As a preferred embodiment, a water receiving container 6 is provided directly below the manual sampling port 13. The water receiving container 6 is connected to the manifold 5. The manifold 5 is closed at one end and has a sewage confluence outlet 51 at the other end. Thus, during manual sampling, the water receiving container 6 can catch sample water dripping from the manual sampling port 13, preventing it from overflowing and contaminating the ground.

[0028] Furthermore, a water tank cover 110 is provided at the top of the pre-treatment box 1, and the water tank cover 110 is detachably connected to the top of the pre-treatment box 1. This facilitates dust prevention of the pre-treatment box 1.

[0029] The specific pretreatment operation of the pretreatment device for the water quality analysis system of the utility model includes the following steps:

[0030] Sampling and analysis: first close the bottom sewage discharge solenoid valve, sampling solenoid valve and sample water solenoid valve, then open the sample water solenoid valve after 5S (adjustable), and let the sample water flow into the pretreatment box 1 from the sample water inlet 12; wait for 60S (adjustable) and then open the sampling solenoid valve to transport the pretreated sample water from the analyzer sampling port 15 to the external analyzer.

[0031] Backwashing: first close the sample water solenoid valve, sampling solenoid valve and backwashing solenoid valve, open the bottom drain valve, and discharge the sample water in the pretreatment tank 1 from the drain port 191; after waiting for 60S (adjustable), open the backwashing solenoid valve, and introduce clean water from the backwashing water inlet 31. The backwashing nozzle 3 sprays and rinses the first-stage filter 21 and the second-stage filter 22 at the same time; after waiting for 120S (adjustable), close the backwashing solenoid valve and the flushing is completed; wait for another 30S (adjustable) and then close the bottom draining solenoid valve to drain the flushed sewage from the drain port 191.

[0032] The pretreatment device for a water quality analysis system of the present invention can facilitate instrument sampling and manual sampling through the arrangement of a multi-stage filtration structure 2, a backwash nozzle 3, and a switch valve 4 corresponding to the pipeline of the manual sampling port 13 and the analyzer sampling port 15. At the same time, it can reduce the problem of the analysis system being unable to detect the instrument due to the blockage of the water quality sampling, and provide a reliable guarantee for the stable operation of the instrument.

[0033] The above descriptions are merely some embodiments of the present invention. Persons skilled in the art will readily appreciate that variations and improvements can be made without departing from the inventive concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A pretreatment device for a water quality analysis system, characterized in that: include: A pretreatment box, used for storing the sample water to be analyzed, wherein the bottom side wall of the pretreatment box is provided with a water inlet, the water inlet is connected to a sample water inlet through a pipeline, and the pipeline of the sample water inlet is connected to an artificial sampling port; At least two layers of filtering structures are fixed in parallel on the inner peripheral wall of the pretreatment box, the upper end of the pretreatment box is provided with a water outlet and is located above the uppermost layer of the filtering structure, and the water outlet is connected to the sampling port of the analyzer through a pipeline; A backwash nozzle, wherein a backwash nozzle is correspondingly provided above each layer of the filtering structure; The switch valves are respectively arranged on the pipeline of the sample water inlet, the pipeline of the analyzer sampling port, the pipeline connected to the backwashing nozzle, and the pipeline connected to the manual sampling port.

2. The pretreatment device for a water quality analysis system according to claim 1, characterized in that: An overflow port is also provided at the upper end of the pretreatment box, and the position of the overflow port is higher than the water outlet.

3. The pretreatment device for a water quality analysis system according to claim 2, characterized in that: A manifold is provided below the pretreatment box, an overflow pipe is connected between the overflow port and the manifold, a sewage outlet connected to the manifold is provided at the bottom of the pretreatment box, and a switch valve is provided on the pipeline connected to the sewage outlet.

4. The pretreatment device for a water quality analysis system according to claim 3, characterized in that: The pretreatment box comprises a cylindrical portion and a conical portion connected to the bottom end of the cylindrical portion, the sewage outlet is arranged at the bottom end of the conical portion, and the filtering structure is arranged in the cylindrical portion.

5. The pretreatment device for a water quality analysis system according to claim 3, characterized in that: A water receiving container is arranged below the artificial sampling port, and the water receiving container is communicated with the confluence pipe. One end of the confluence pipe is closed, and the other end is provided with a sewage confluence discharge port.

6. The pretreatment device for a water quality analysis system according to any one of claims 1 to 5, characterized in that: The filtering structure is detachably mounted on the inner peripheral wall of the pre-processing box.

7. The pretreatment device for a water quality analysis system according to claim 6, characterized in that: The filtering structure is a filter net.

8. The pretreatment device for a water quality analysis system according to claim 3, characterized in that: The backwash nozzle is connected to a backwash water inlet through a pipeline, and a switch valve is also arranged on the pipeline.

9. The pretreatment device for a water quality analysis system according to claim 8, characterized in that: The switch valves arranged on the pipe of the sample water inlet, the pipe of the analyzer sampling port, the pipe connected to the backwash nozzle, and the pipe connected to the sewage outlet are all solenoid valves, and the switch valve arranged on the pipe of the manual sampling port is a manual valve, and the solenoid valve is electrically connected to the controller.

10. The pretreatment device for a water quality analysis system according to any one of claims 1 to 5, characterized in that: A water tank cover is arranged on the top of the pretreatment tank.

Images