A self-cleaning pretreatment system for water analyzers

Abstract

This invention discloses a self-cleaning pretreatment system for a water analyzer, comprising a housing and a self-cleaning assembly. The housing contains a filter module within its filter chamber. The self-cleaning assembly includes a multi-way valve group connected to a cleaning chamber and a discharge chamber. The multi-way valve group is connected to a backwash water pump, a compressed air source module, and a dosing pump. The self-cleaning module also includes a discharge valve connected to the cleaning chamber and the discharge chamber. This invention employs pulsed gas-liquid backwashing combined with chemical cleaning, significantly improving the cleaning effect on the filter element compared to traditional methods and extending its service life. During operation, the equipment uses a PLC controller for fully automated control, eliminating the need for manual intervention. Remote monitoring and operation are possible, reducing maintenance costs. Compared to traditional methods, it saves on reagent consumption and reduces wastewater discharge.

Description

Technical Field

[0001] This utility model relates to the technical field of water quality analysis equipment, specifically to a self-cleaning pretreatment system for a water analyzer, which can automatically filter and purify water samples and perform self-cleaning maintenance to ensure the long-term stable operation of the water analyzer. Background Technology

[0002] Water analyzers are widely used in environmental monitoring, industrial process control, and other fields to monitor water quality parameters in real time. However, the water samples to be analyzed usually contain impurities such as suspended particles, colloids, and microorganisms. If these impurities are introduced directly into the analyzer, they can cause sensor contamination and pipeline blockage, affecting measurement accuracy and equipment lifespan.

[0003] Traditional pretreatment systems, although equipped with filtration devices, have the following drawbacks: filter cartridges are prone to clogging, requiring frequent manual replacement or cleaning, resulting in high maintenance costs; backwashing is ineffective and difficult to completely remove stubborn pollutants; chemical cleaning processes are complex, requiring manual preparation of chemicals and taking a long time; and they cannot automatically adjust cleaning strategies according to changes in water quality, resulting in low levels of intelligence. Utility Model Content

[0004] The purpose of this invention is to provide a highly automated, effective self-cleaning pretreatment system for water analyzers. Through optimized gas-liquid backwashing and chemical cleaning technologies, it extends the service life of the filter element and improves the reliability and measurement accuracy of the water analyzer.

[0005] The technical solution adopted by this utility model is as follows: a self-cleaning pretreatment system for a water analyzer, comprising a housing, a cleaning chamber, a filtering chamber, and a discharge chamber arranged sequentially from the input end to the output end within the housing, and an inlet pump at the input end of the housing; a filtering module is provided in the filtering chamber; and a self-cleaning component is also included; the self-cleaning component includes a multi-way valve group connected to the cleaning chamber, the multi-way valve group being connected to a backwash water pump, a compressed air source module, and a dosing pump, and the self-cleaning module also includes a discharge valve connected to the cleaning chamber and the discharge chamber; the multi-way valve group, the backwash water pump, the compressed air source module, the dosing pump, and the discharge valve are connected to a controller module.

[0006] In this technical solution, the pretreatment system can be connected to a water analyzer. After the inlet pump starts, the water sample is filtered through the filtration module, and the clean water sample is then delivered to the water analyzer. The filter cake layer formed by impurities trapped by the filtration module can be cleaned through multiple modes, including gas-liquid flushing and chemical cleaning. In gas-liquid flushing mode, the air and water paths are opened through a multi-way valve assembly. Cleaning water and compressed air are input using a backwash water pump and a compressed air source module, causing clean water and compressed air to mix inside the filter element to form a gas-liquid pulse. The controller module optimizes the pulse intensity and frequency by adjusting the opening and closing frequency of the multi-way valve assembly and the compressed air pressure, effectively removing contaminants from the surface of the filter element. The backwash wastewater is discharged from the system through a discharge valve. In chemical cleaning mode, a chemical cleaning agent is drawn by a dosing pump and injected into the filtration module through the multi-way valve assembly for circulating cleaning. The cleaning wastewater is discharged from the system through a drain outlet.

[0007] Preferably, the controller module is signal-connected to a differential pressure sensor module that monitors the pressure difference between the discharge chamber and the cleaning chamber.

[0008] Preferably, the dosing pump is connected to an acid storage tank, an alkali storage tank, and an oxidant storage tank.

[0009] Preferably, the housing has an input connector and an output connector at the input end and the output end, respectively, and the input connector and the output connector are equipped with a sampling control valve that is connected to the controller module for signal transmission.

[0010] Preferably, the filter chamber is provided with sealing rings at both ends that abut against the edges of the filter module.

[0011] Preferably, the filter element of the filtration module is a hollow fiber membrane or a ceramic membrane filter element.

[0012] The beneficial effects of this invention are as follows: The cleaning effect achieved by combining pulsed gas-liquid backwashing with chemical cleaning is significantly improved compared to traditional methods, extending the filter cartridge's lifespan. The equipment operates with a controller, achieving fully automated control of the entire process without manual intervention, thus reducing maintenance costs. Automated control allows for flexible adjustment of cleaning strategies and reagent ratios based on different water quality characteristics, making it widely applicable. The self-cleaning process precisely controls reagent dosage and cleaning time, saving reagent consumption and reducing wastewater discharge compared to traditional methods, demonstrating high practical value. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1This is a structural diagram of the self-cleaning pretreatment system for a water analyzer provided in an embodiment of this utility model.

[0015] Reference numerals: housing 100, cleaning chamber 110, filter chamber 120, discharge chamber 130, inlet pump 200, filter module 300, multi-way valve group 400, backwash water pump 500, compressed air source module 600, dosing pump 700, discharge valve 800, acid storage tank 9000, alkali storage tank 1000, oxidant storage tank 1100, input connector 1200, output connector 1300, sampling control valve 1400, sealing ring 1500. Detailed Implementation

[0016] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0017] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0018] like Figure 1 As shown in the figure, a specific embodiment of this utility model provides a self-cleaning pretreatment system for a water analyzer, including a housing 100. The housing 100 contains a cleaning chamber 110, a filter chamber 120, and a discharge chamber 130 arranged sequentially from the input end to the output end. An inlet pump 200 is provided at the input end of the housing 100. A filter module 300 is provided in the filter chamber 120. The system also includes a self-cleaning component. The self-cleaning component includes a multi-way valve assembly 400 connected to the cleaning chamber 110. The multi-way valve assembly 400 is connected to a backwash water pump 500, a compressed air source module 600, and a dosing pump 700. The self-cleaning module also includes a discharge valve 800 connected to the cleaning chamber 110 and the discharge chamber 130. A controller module is connected to the multi-way valve assembly 400, the backwash water pump 500, the compressed air source module 600, the dosing pump 700, and the discharge valve 800.

[0019] like Figure 1As shown, with the above settings, the pretreatment system provided in this embodiment can be connected to a water analyzer. The filter module 300 is used to trap impurities in the water sample. After the inlet pump 200 starts, the water sample is filtered through the filter module 300, and the resulting clean water sample is delivered to the water analyzer. After the sampling and filtration operation, the filter cake layer formed by the impurities trapped by the filter module can be cleaned by rinsing in various modes, including gas-liquid rinsing mode and chemical cleaning mode. In gas-liquid rinsing mode, the inlet pump 200 is first shut off, and the air and water paths are opened through the multi-way valve group 400. Cleaning water and compressed gas are input using the backwash water pump 500 and the compressed air source module 600, causing clean water and compressed air to mix inside the filter element to form a gas-liquid pulse. The controller module adjusts the opening and closing frequency of the multi-way valve group 400 and the compressed air pressure to form pulse cleaning. By adjusting parameters such as pulse frequency, air pressure, and water pressure, contaminants on the surface of the filter element are efficiently removed. The backwash wastewater is discharged from the system through the discharge valve 800. In the chemical cleaning mode, the cleaning agent is drawn by the dosing pump 700 and injected into the filter module 300 through the multi-way valve assembly 400 for circulating cleaning. The cleaning wastewater is discharged from the system through the drain outlet. In practical applications, the controller module automatically adjusts the ratio and concentration of cleaning agents such as acids, alkalis, and oxidants based on the pollution characteristics of the water sample (e.g., hardness, organic matter content). Simultaneously, the controller module records the effect and parameters of each cleaning cycle and optimizes subsequent cleaning strategies through machine learning algorithms to achieve a balance between cleaning effectiveness and cost. The combination of pulsed gas-liquid backwashing and chemical cleaning improves the cleaning effect of the filter element by 30%-50% compared to traditional methods, and extends the filter element's lifespan by 2-3 times.

[0020] like Figure 1 As shown, in actual use, to achieve automatic cleaning, the controller module is connected to a differential pressure sensor module that monitors the pressure difference between the discharge chamber 110 and the cleaning chamber 130. Thus, the controller module can compare the transmembrane pressure difference through the differential pressure sensor module. When the controller module detects that the transmembrane pressure difference reaches a set threshold (e.g., 0.1 MPa) or the running time reaches a preset value, it triggers the backwashing program. After rinsing is completed, the differential pressure can also be monitored to automatically determine whether chemical cleaning needs to be initiated.

[0021] In the chemical dosing cleaning mode, different chemicals need to be selected according to the cleaning requirements. In this embodiment, the dosing pump 700 is connected to an acid storage tank 9000, an alkali storage tank 1000, and an oxidant storage tank 1100. Thus, during cleaning, the dosing pump 700 draws cleaning agent (such as hydrochloric acid solution with pH=2 or sodium hydroxide solution with pH=12) from the corresponding chemical storage tank; this agent is then injected into the filter unit through the multi-way valve assembly 400 for circulating cleaning or soaking cleaning.

[0022] As mentioned above, this system needs to be connected to a water analysis instrument for filtering sampled water. In this embodiment, the input end 1200 and the output end 1300 of the housing 100 are respectively provided. The input end 1200 and the output end 1300 are provided with sampling control valves 1400 that are connected to the controller module. The input end 1200 and the output end 1300 are respectively connected to the sampling end and the water analyzer. During sampling, the sampling control valve 1400 is opened to ensure that the water sample is normally input into the analyzer. During cleaning, the sampling control valve 1400 is closed to ensure that the seal is maintained during rinsing.

[0023] like Figure 1 As shown, in order to ensure the sealing of the assembly area between the filter module 300 and the housing 100, the filter chamber 120 is provided with sealing rings 1500 at both ends that abut against the edges of the filter module 300.

[0024] In practical applications, the filter element of the filter module 300 is a hollow fiber membrane or a ceramic membrane filter element. High-precision filter elements such as hollow fiber membranes or ceramic membranes are used to intercept impurities in water samples.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail 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. Such 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 of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A self-cleaning pretreatment system for a water analyzer, comprising a housing (100), wherein a cleaning chamber (110), a filtration chamber (120), and a discharge chamber (130) are arranged sequentially from the input end to the output end within the housing (100); an inlet pump (200) is provided at the input end of the housing (100); and a filtration module (300) is provided within the filtration chamber (120); characterized in that... ； It also includes a self-cleaning component; the self-cleaning component includes a multi-way valve assembly (400) connected to the cleaning chamber (110), the multi-way valve assembly (400) being connected to a backwash water pump (500), a compressed air source module (600) and a dosing pump (700), and the self-cleaning module also includes a discharge valve (800) connected to the cleaning chamber (110) and the discharge chamber (130); The multi-way valve assembly (400), backwash water pump (500), compressed air source module (600), dosing pump (700) and discharge valve (800) are connected to a controller module.

2. The self-cleaning pretreatment system for a water analyzer according to claim 1, characterized in that; The controller module is signal-connected to a differential pressure sensor module that monitors the pressure difference between the discharge chamber (130) and the cleaning chamber (110).

3. The self-cleaning pretreatment system for a water analyzer according to claim 1, characterized in that; The dosing pump (700) is connected to an acid storage tank (9000), an alkali storage tank (1000), and an oxidant storage tank (1100).

4. The self-cleaning pretreatment system for a water analyzer according to claim 1, characterized in that; The housing (100) is provided with an input connector (1200) and an output connector (1300) at its input and output ends, respectively. The input connector (1200) and the output connector (1300) are provided with sampling control valves (1400) that are connected to the controller module signal.

5. The self-cleaning pretreatment system for a water analyzer according to claim 1, characterized in that; The filter chamber (120) is provided with sealing rings (1500) at both ends that abut against the edges of the filter module (300).

6. The self-cleaning pretreatment system for a water analyzer according to claim 1, characterized in that; The filter element of the filter module (300) is a hollow fiber membrane or a ceramic membrane filter element.

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