A pretreatment back flushing structure for total organic carbon water quality automatic detector

Abstract

A kind of pretreatment backflush structure for total organic carbon water quality automatic detector.It includes sample inlet valve, two-way electromagnetic valve is connected above sample inlet valve by conduit, it is connected to sampling point by conduit below sample inlet valve, as sample inlet;Two-way electromagnetic valve is connected filter by conduit above filter, filter right end is connected first reversing electromagnetic valve B end by conduit, first reversing electromagnetic valve A end is connected quick connector by conduit, quick connector other end is connected compressed air by hose for backflush, first reversing electromagnetic valve C end is connected variable-diameter tee joint first end by conduit, variable-diameter tee joint second end is connected to instrument sampling port by polytetrafluoroethylene tube;Filter below is connected second reversing electromagnetic valve B end by conduit, second reversing electromagnetic valve A end is connected to purge outlet.The pretreatment backflush structure is based on sample inlet passage, filter backflush passage is added by reversing electromagnetic valve, can realize automatic backflush function, can ensure the stability of instrument flow path.

Description

Technical Field

[0001] This utility model relates to the technical field of automatic online total organic carbon (TOC) analyzers, and in particular to a pretreatment backflushing structure for an automatic TOC water quality analyzer. Background Technology

[0002] Maintaining a clean and stable flow path is crucial for the accurate and reliable operation of the total organic carbon (TOC) analyzer, and is a key factor in ensuring the quality of experimental data.

[0003] In existing automated online total organic carbon (TOC) analyzers, when large particles such as silt clog the filter in the water sample, manual disassembly and cleaning of the filter is required. This increases maintenance workload and is inefficient, especially at monitoring points with severe water pollution and high levels of impurities. Failure to clean the residue in the sample inlet line can cause filter blockage, preventing sampling and measurement. This also affects the accuracy and real-time performance of the measurements. Furthermore, manual methods cannot meet the demands of modern automated water quality testing. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned technical problems and provide a pretreatment backflushing structure for an automatic total organic carbon water quality analyzer. Based on the sample inlet path, the pretreatment backflushing structure adds a filter backflushing path through a reversing solenoid valve, which can realize the automatic backflushing function and ensure the stability of the instrument's flow path.

[0005] To solve the aforementioned problems in the prior art, the technical solution of this utility model is as follows:

[0006] This utility model discloses a pretreatment backflushing structure for an automatic total organic carbon water quality analyzer. It includes an inlet stop valve, a two-way solenoid valve connected above the inlet stop valve via a conduit, and a sampling point connected below the inlet stop valve via a conduit, serving as the sample inlet. A filter is connected above the two-way solenoid valve via a conduit. The right end of the filter is connected to the B end of a first reversing solenoid valve via a conduit. The A end of the first reversing solenoid valve is connected to a quick-connect fitting via a conduit. The other end of the quick-connect fitting is connected to compressed air via a hose for backflushing. The C end of the first reversing solenoid valve is connected to the first end of a reducing tee connector via a conduit. The second end of the reducing tee connector is connected to the instrument's sampling port via a polytetrafluoroethylene tube. The third end of the reducing tee connector is connected to a second tee connector via a conduit. The left end of the second tee connector is connected to a third tee connector via a stainless steel tube. The left end of the third tee connector is connected to the sample outlet. Instrument waste liquid is discharged from below the third tee connector.

[0007] The filter is connected to the B end of the second reversing solenoid valve via a conduit. The A end of the second reversing solenoid valve is connected to the purge outlet for the discharge of purge gas and pollutants. The C end of the second reversing solenoid valve is connected to the return shut-off valve via a conduit for regulating water sample pressure and flow. The return shut-off valve is connected to the second tee connector via a conduit below, forming a quick loop.

[0008] When the pretreatment backflush structure is not backflushing, the two-way solenoid valve is normally open, the first reversing solenoid valve BC is connected, the second reversing solenoid valve BC is connected, and the pretreatment backflush structure can feed samples normally. Part of the sample is transported to the instrument sampling port through the first reversing solenoid valve and the second end of the reducing tee connector, while the other part of the sample is discharged through the second reversing solenoid valve, the return shut-off valve, the second tee connector, and the sample outlet to ensure a certain sampling flow rate.

[0009] When the pretreatment backflushing structure performs backflushing, the two-way solenoid valve is closed, the first reversing solenoid valve BA is connected, and the second reversing solenoid valve AB is connected. Compressed air is blown into the filter from the first reversing solenoid valve, and the deposits on the filter element are blown away through the second reversing solenoid valve and the purge outlet.

[0010] This utility model discloses a pretreatment backflushing structure for an automatic water quality analyzer for total organic carbon, which has the following advantages:

[0011] 1. Based on the sample inlet path, this pretreatment backflush structure adds a filter backflush path through a reversing solenoid valve, which can realize automatic backflush function, ensure the stability of the instrument flow path, and can be applied to monitoring points with serious water pollution and many impurities.

[0012] 2. It can backflush the blockages attached to the filter element to the discharge port, avoiding the inability to take samples and measure due to filter blockage;

[0013] 3. It can clean up residues on the sample inlet line, effectively improving the accuracy and real-time performance of measurements;

[0014] 4. This solution can be set to automatically backflush at a set time, achieving long-term maintenance-free operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pretreatment backflushing structure for an automatic water quality analyzer for total organic carbon according to this utility model.

[0016] Figure 2 This is a schematic diagram of the pretreatment backflushing structure of an automatic water quality analyzer for total organic carbon during normal sampling. The arrows indicate the sample path.

[0017] Figure 3This is a schematic diagram of the pretreatment backflushing structure for an automatic water quality analyzer for total organic carbon, as described in this utility model. The arrows indicate the backflushing path. Detailed Implementation

[0018] The present invention will be further described below with reference to embodiments:

[0019] Example 1:

[0020] like Figures 1-3 This utility model discloses a pretreatment backflushing structure for an automatic total organic carbon water quality analyzer. It includes an injection stop valve 1, a two-way solenoid valve 2 connected above the injection stop valve via a conduit, and a sampling point connected below the injection stop valve via a conduit, serving as the sample inlet M. A filter 3 is connected above the two-way solenoid valve via a conduit, and the right end of the filter is connected to the B end of a first reversing solenoid valve 4 via a conduit. The A end of the first reversing solenoid valve is connected to a quick-connect fitting 5 via a conduit, and the other end of the quick-connect fitting is connected to compressed air H via a hose for backflushing. The C end of the first reversing solenoid valve is connected to the first end of a reducing tee fitting 6 via a conduit. The second end of the reducing tee fitting is connected to the instrument sampling port G via a polytetrafluoroethylene tube. The third end of the reducing tee fitting is connected to a second tee fitting 7 via a conduit. The left end of the second tee fitting is connected to a third tee fitting 8 via a stainless steel tube. The left end of the third tee fitting is connected to the sample outlet P. Instrument waste liquid is discharged from the instrument waste liquid port Q below the third tee fitting.

[0021] The filter is connected to the B end of the second reversing solenoid valve 9 via a conduit. The A end of the second reversing solenoid valve is connected to the purge outlet N for the discharge of purge gas and pollutants. The C end of the second reversing solenoid valve is connected to the return shut-off valve 10 via a conduit for the regulation of water sample pressure and flow. The return shut-off valve is connected to the second tee connector via a conduit below to form a fast loop.

[0022] Furthermore, the conduit for the pretreatment backflushing structure is made of stainless steel.

[0023] Example 2:

[0024] The difference between this embodiment and embodiment 1 is that the pretreatment backflushing structure is also connected to a timer, which controls the backflushing time to achieve a timed backflushing function.

[0025] Example 3:

[0026] The difference between this embodiment and Embodiment 1 is that the filter is connected to a filter element detector, which can detect the filtration function of the filter element. When the filter element detector detects that the filtration rate of the filter element is less than the set value, the pretreatment backflushing structure performs backflushing.

[0027] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A pretreatment backflushing structure for an automatic total organic carbon water quality analyzer, characterized in that: It includes an injection shut-off valve, a two-way solenoid valve connected above the injection shut-off valve via a conduit, and a sampling point connected below the injection shut-off valve via a conduit as a sample inlet. A filter is connected above the two-way solenoid valve via a conduit, and the right end of the filter is connected to the B end of the first reversing solenoid valve via a conduit. The A end of the first reversing solenoid valve is connected to a quick-connect fitting via a conduit, and the other end of the quick-connect fitting is connected to compressed air via a hose for backflushing. The C end of the first reversing solenoid valve is connected to the first end of a reducing tee fitting via a conduit, and the second end of the reducing tee fitting is connected to the instrument's sampling port via a polytetrafluoroethylene tube. The filter is connected to the B end of the second reversing solenoid valve via a conduit. The A end of the second reversing solenoid valve is connected to the purge outlet for the discharge of purge gas and pollutants.

2. The pretreatment backflushing structure for an automatic total organic carbon water quality analyzer according to claim 1, characterized in that, The third end of the reducing tee is connected to the second tee via a conduit. The left end of the second tee is connected to the third tee via a stainless steel tube. The left end of the third tee is connected to the sample outlet. The instrument waste liquid is discharged from below the third tee. The second reversing solenoid valve C is connected to the return shut-off valve via a conduit to regulate the water sample pressure and flow rate. The return shut-off valve is connected to the second tee connector via a conduit to form a fast loop.

3. The pretreatment backflushing structure for an automatic total organic carbon water quality analyzer according to claim 1, characterized in that, The conduit for the pretreatment backflushing structure is made of stainless steel.

4. The pretreatment backflushing structure for an automatic total organic carbon water quality analyzer according to claim 1, characterized in that, The pretreatment backflushing structure is also connected to a timer, which controls the backflushing time to achieve a timed backflushing function.

5. The pretreatment backflushing structure for an automatic total organic carbon water quality analyzer according to claim 1, characterized in that, The filter is connected to a filter element detector, which can detect the filtration function of the filter element. When the filter element detector detects that the filtration rate of the filter element is less than a set value, the pretreatment backflushing structure performs backflushing.

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