Flow path system of total-iron online colorimetric analyzer

Abstract

The utility model provides a flow path system of a total iron on-line colorimetric analyzer, which relates to the technical field of on-line analyzer calibration, and comprises a liquid distribution valve, a first pump body, a mixing and stirring pool, a second pump body and a colorimetric assembly which are connected in sequence, the liquid distribution valve is used for distributing one of air, a first reagent for converting total iron into iron ions, a second reagent for developing the iron ions, a standard solution with known iron ion concentration and a water sample to be detected to enter the first pump body; by means of the first control valve, the second control valve and the third control valve, before each time of measurement of a water sample to be detected, the control assembly forcibly uses a standard solution for online automatic calibration, the total iron content of the finally output water sample to be detected is well guaranteed, and the quality of detection data is guaranteed by adopting the flow path system in a long-term unattended state.

Description

Technical Field

[0001] The utility model belongs to the technical field of on-line analyzer calibration, and more specifically, relates to a flow path system of a total iron on-line colorimetric analyzer. Background Art

[0002] At present, when detecting the total iron content in an aqueous solution, most on-line analyzers of the sensor type do not have an automatic calibration function. It is necessary for maintenance personnel to go to the site for manual calibration at intervals (usually once a month or several months). However, this calibration interval is too long and cannot guarantee the quality of measurement data under the long-term unattended state. Most users are skeptical about such data. In principle of quantitative analysis of instruments, any analytical instrument should be calibrated before measurement to ensure the quality of measurement data. Content of the Utility Model

[0003] The purpose of the utility model is to provide a flow path system of a total iron on-line colorimetric analyzer for the deficiencies of the prior art, so as to solve the problem that most current on-line analyzers of the sensor type do not have an automatic calibration function and it is necessary for maintenance personnel to go to the site for manual calibration at intervals, which seriously affects the quality of detection data under the long-term unattended state as mentioned in the above background art.

[0004] To achieve the above purpose, the utility model provides a flow path system of a total iron on-line colorimetric analyzer, and the flow path system includes:

[0005] A liquid distribution valve, a first pump body, a mixing and stirring tank, a second pump body and a colorimetric component connected in sequence. The liquid distribution valve is used to distribute one of air, a first reagent for converting total iron into iron ions, a second reagent for iron ion color development, a standard solution with a known iron ion concentration and a water sample to be measured into the first pump body;

[0006] A first control valve, a second control valve and a third control valve. The first control valve is arranged between the first pump body and the mixing and stirring tank, and the first control valve can control the fluid to be discharged from the system or discharged into the mixing and stirring tank. The second control valve is arranged between the mixing and stirring tank and the second pump body. The mixing and stirring tank is provided with a vent port, and the vent port is connected to the third control valve;

[0007] A control component, which is electrically connected to the liquid distribution valve, the first pump body, the second pump body, the first control valve, the second control valve, the third control valve and the mixing and stirring tank. The control component can send instructions to the liquid distribution valve, the first pump body, the second pump body, the first control valve, the second control valve, the third control valve and the mixing and stirring tank to enable the colorimetric component to measure the absorbance of the standard solution and the water sample to be measured in sequence.

[0008] Preferably, the flow path system of the total iron on-line colorimetric analyzer further includes a heater, and the heater is connected to the mixing and stirring tank.

[0009] Preferably, the liquid distribution valve is provided with a liquid distribution outlet, an air inlet, a first reagent inlet, a second reagent inlet, a standard solution inlet, and a water sample to be measured inlet.

[0010] Preferably, the first control valve is provided with a first inlet, a first outlet, and a second outlet. The first outlet communicates with the mixing and stirring tank, and the second outlet and the outlet of the colorimetric component both lead to the outside of the system (generally).

[0011] Preferably, the first control valve is a solenoid valve.

[0012] Preferably, both the second control valve and the third control valve are pressure tube valves.

[0013] Preferably, both the first pump body and the second pump body are peristaltic pumps.

[0014] Preferably, the flow path system of the total iron on-line colorimetric analyzer further includes a filter head, and the filter head is connected to the water sample to be measured inlet.

[0015] Preferably, the colorimetric component includes a colorimetric cell, a light source, and a photovoltaic cell, and the colorimetric cell is arranged between the light source and the photovoltaic cell.

[0016] Preferably, the flow path system of the total iron on-line colorimetric analyzer further includes a locator, and the locator is arranged between the second pump body and the colorimetric component.

[0017] The present utility model provides a flow path system of a total iron on-line colorimetric analyzer, and its beneficial effects are as follows: The first control valve, the second control valve, and the third control valve of the flow path system can perform opening and closing actions after receiving instructions to sequentially measure the absorbance of the standard solution and the water sample to be measured. Before each measurement of the water sample to be measured, the control component compulsorily uses the standard solution for on-line automatic calibration, so that the iron ion concentration of the finally output water sample to be measured is well guaranteed. Using this flow path system under the condition of long-term unattended operation ensures the quality of the detection data.

[0018] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By describing the exemplary embodiments of the present utility model in more detail in conjunction with the drawings, the above-mentioned and other objects, features, and advantages of the present utility model will become more obvious. Among them, in the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.

[0020] Figure 1The structural schematic diagram of the flow path system of an all-iron online colorimetric analyzer according to an embodiment of the present invention is shown.

[0021] Explanation of reference numerals:

[0022] 1. Liquid distribution valve; 2. First pump body; 3. Mixing and stirring tank; 4. Colorimetric component; 5. First control valve; 6. Second control valve; 7. Third control valve; 8. Vent port; 9. Air inlet; 10. First reagent inlet; 11. Second reagent inlet; 12. Standard solution inlet; 13. Water sample to be measured inlet; 14. Second pump body; 15. First outlet; 16. Second outlet. Detailed implementation manners

[0023] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0024] As Figure 1 shown, the present invention provides a flow path system of an all-iron online colorimetric analyzer, and the flow path system includes:

[0025] A liquid distribution valve 1, a first pump body 2, a mixing and stirring tank 3, a second pump body 14, and a colorimetric component 4 connected in sequence. The liquid distribution valve 1 is used to distribute one of air, a first reagent for converting all iron into iron ions, a second reagent for iron ion color development, a standard solution with a known iron ion concentration, and a water sample to be measured into the first pump body 2;

[0026] A first control valve 5, a second control valve 6, and a third control valve 7. The first control valve 5 is arranged between the first pump body 2 and the mixing and stirring tank 3, and the first control valve 5 can control the fluid to be discharged from the system or discharged into the mixing and stirring tank 3. The second control valve 6 is arranged between the mixing and stirring tank 3 and the second pump body 14. The mixing and stirring tank 3 is provided with a vent port 8, and the vent port 8 is connected to the third control valve 7;

[0027] A control component, which is electrically connected to the liquid distribution valve 1, the first pump body 2, the second pump body 14, the first control valve 5, the second control valve 6, the third control valve 7, and the mixing and stirring tank 3. The control component can send instructions to the liquid distribution valve 1, the first pump body 2, the second pump body 14, the first control valve 5, the second control valve 6, the third control valve 7, and the mixing and stirring tank 3 to enable the colorimetric component 4 to sequentially measure the absorbance of the standard solution and the water sample to be measured.

[0028] Specifically, to solve the problem that most current online analyzers of sensor type do not have an automatic calibration function, and maintenance personnel need to go to the site for manual calibration at regular intervals, which seriously affects the quality of detection data in the long-term unattended state, the present utility model provides a flow path system for a total iron online colorimetric analyzer. The control component of this flow path system is a PLC controller. The PLC controller is programmed with a program for controlling a liquid dispensing valve 1, a first pump body 2, a second pump body 14, a first control valve 5, a second control valve 6, a third control valve 7, and a mixing and stirring tank 3. The control program of the PLC controller can achieve the control function of this flow path system with existing technology. The first control valve 5, the second control valve 6, and the third control valve 7 of this flow path system can perform opening and closing actions after receiving instructions to sequentially measure the absorbance of a standard solution and a water sample to be measured. Before each measurement of the water sample to be measured, the control component compulsorily uses the standard solution for online automatic calibration, ensuring the iron ion concentration of the finally output water sample to be measured is well guaranteed. Using this flow path system in the long-term unattended state ensures the quality of detection data.

[0029] Specifically, the first reagent can be a hydrochloric acid solution for converting total iron into iron ions, and the second reagent can be a mixed solution of sodium acetate, hydroxylamine hydrochloride, and o-phenanthroline for realizing the color development of iron ions.

[0030] Preferably, the flow path system of the total iron online colorimetric analyzer further includes a heater, and the heater is connected to the mixing and stirring tank 3.

[0031] Specifically, the water sample to be measured or the standard solution can respectively enter the mixing and stirring tank 3, and are mixed and heated with the hydrochloric acid solution here to ensure that all total iron is converted into iron ions.

[0032] Preferably, the liquid dispensing valve 1 is provided with a liquid distribution outlet, an air inlet 9, a first reagent inlet 10, a second reagent inlet 11, a standard solution inlet 12, and a water sample to be measured inlet 13.

[0033] Specifically, the liquid dispensing valve 1 is a five-in-one-out liquid dispensing valve.

[0034] Preferably, the first control valve 5 is provided with a first inlet, a first outlet 15, and a second outlet 16. The first outlet 15 is communicated with the mixing and stirring tank 3, and the second outlet 16 is communicated with the outlet of the colorimetric component 4.

[0035] Preferably, the first control valve 5 is a solenoid valve.

[0036] Specifically, the solenoid valve is a two-position three-way solenoid valve.

[0037] Specifically, the solenoid valve is convenient for automatic control.

[0038] Preferably, both the second control valve 6 and the third control valve 7 are pressure tube valves.

[0039] Preferably, both the first pump body 2 and the second pump body 14 are peristaltic pumps.

[0040] Preferably, the flow path system of the total iron on-line colorimetric analyzer further includes a filter head, and the filter head is connected to the water sample inlet 13 to be measured.

[0041] Specifically, the water sample to be measured is sucked into the flow path system from the position of the filter head.

[0042] Preferably, the colorimetric component 4 includes a colorimetric cell, a light source, and a photovoltaic cell, and the colorimetric cell is arranged between the light source and the photovoltaic cell.

[0043] Specifically, it is used to read the absorbance of the standard solution and the water sample to be measured.

[0044] Preferably, the flow path system of the total iron on-line colorimetric analyzer further includes a locator, and the locator is arranged between the second pump body 14 and the colorimetric component 4.

[0045] Specifically, the locator can identify whether it is air or solution in the flow path system to ensure that the pipeline passing through the colorimetric component 4 is filled with the water sample to be measured during measurement, and to ensure that the air expels the residue of the previous sample in the flow path system.

[0046] In summary, when the flow path system of the total iron on-line colorimetric analyzer of the present invention is implemented, as Figure 1 shown, it specifically includes:

[0047] The calibration steps of the flow path system include:

[0048] The liquid distribution valve 1 is switched to the air inlet 9, the first outlet 15 of the first control valve 5 (two-way three-way solenoid valve) is closed and the second outlet 16 is opened. Air passes through the liquid distribution valve 1, the first pump body 2, and the second opening 16 of the first control valve and is discharged for 30 s. The third control valve is closed and the second control valve 6 is opened. The first outlet 15 of the first control valve is opened and the second outlet 16 is closed. Air passes through the liquid distribution valve 1, the first pump body 2, the first outlet 15 of the first control valve 5, the mixing and stirring tank 3, the second pump body 14, and the colorimetric cell, and is discharged from the outlet of the colorimetric cell for 30 s;

[0049] The third control valve 7 is opened and the second control valve 6 is closed;

[0050] The liquid distribution valve 1 is switched to the standard solution inlet 12, and a preset time is set to suck the standard solution into the mixing and stirring tank 3. The liquid distribution valve 1 is switched to the air inlet 9, and a preset time is set to suck air to push the remaining standard solution in the flow path system into the mixing and stirring tank 3, and a delay of 30 s is set;

[0051] The liquid distribution valve 1 is switched to the first reagent inlet 10, and the process after repeating the third step "the liquid distribution valve is switched to the standard solution inlet" is repeated;

[0052] The liquid dispensing valve 1 is switched to the second reagent inlet 11, and the process after repeating the third step "the liquid dispensing valve is switched to the standard solution inlet" is carried out;

[0053] ⑦ Start the heater and keep it running for 5 min. Open the first control valve 5. After a preset period of time, read the absorbance of the mixed solution in the colorimetric cell. Keep it running for 30 s after all the mixed solution is discharged.

[0054] ⑧ Stop heating of the heater, the stirring of the first pump body 2, the second pump body 14 and the mixing and stirring tank 3. Open both the second control valve 6 and the third control valve 7, and enter the sleep state to wait for the next wake-up.

[0055] The embodiments of the present utility model have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A flow path system of an all-iron on-line colorimetric analyzer, characterized in that, The flow path system includes: A liquid dispensing valve, a first pump body, a mixing and stirring tank, a second pump body, and a colorimetric component connected in sequence. The liquid dispensing valve is used to distribute one of air, a first reagent for converting total iron into iron ions, a second reagent for iron ion color development, a standard solution with a known iron ion concentration, and a water sample to be measured into the first pump body; A first control valve, a second control valve, and a third control valve. The first control valve is arranged between the first pump body and the mixing and stirring tank, and the first control valve can control the fluid to be discharged from the system or discharged into the mixing and stirring tank. The second control valve is arranged between the mixing and stirring tank and the second pump body. The mixing and stirring tank is provided with a vent port, and the vent port is connected to the third control valve; A control component, which is electrically connected to the liquid dispensing valve, the first pump body, the second pump body, the first control valve, the second control valve, the third control valve, and the mixing and stirring tank. The control component can send instructions to the liquid dispensing valve, the first pump body, the second pump body, the first control valve, the second control valve, the third control valve, and the mixing and stirring tank to enable the colorimetric component to sequentially measure the absorbance of the standard solution and the water sample to be measured.

2. The flow path system of an all-iron online colorimetric analyzer according to claim 1, characterized in that, The flow path system of the total iron on-line colorimetric analyzer further includes a heater, and the heater is connected to the mixing and stirring tank.

3. The flow path system of a total iron on-line colorimetric analyzer according to claim 1, characterized in that, The liquid dispensing valve is provided with a flow distribution outlet, an air inlet, a first reagent inlet, a second reagent inlet, a standard solution inlet, and a water sample to be measured inlet.

4. The flow path system of an all-iron online colorimetric analyzer according to claim 1, characterized in that, The first control valve is provided with a first inlet, a first outlet, and a second outlet. The first outlet is communicated with the mixing and stirring tank, and the second outlet and the outlet of the colorimetric component both lead to the outside of the system.

5. The flow path system of an all-iron online colorimetric analyzer according to claim 1, characterized in that, The first control valve is a solenoid valve.

6. The flow path system of an all-iron online colorimetric analyzer according to claim 1, characterized in that Both the second control valve and the third control valve are pressure tube valves.

7. The flow path system of an all-iron online colorimetric analyzer according to claim 1, characterized in that, Both the first pump body and the second pump body are peristaltic pumps.

8. The flow path system of an all-iron online colorimetric analyzer according to claim 3, characterized in that, The flow path system of the total iron on-line colorimetric analyzer further includes a filter head, and the filter head is connected to the water sample to be measured inlet.

9. The flow path system of an all-iron on-line colorimetric analyzer according to claim 1, characterized in that, The colorimetric component includes a colorimetric cell, a light source, and a photovoltaic cell, and the colorimetric cell is arranged between the light source and the photovoltaic cell.

10. The flow path system of an all-iron on-line colorimetric analyzer according to claim 1, characterized in that, The flow path system of the total iron on-line colorimetric analyzer further includes a locator, and the locator is arranged between the second pump body and the colorimetric component.

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