Online orthophosphate and ammonia nitrogen measuring device in water treatment

Abstract

The utility model belongs to the technical field of phosphate and ammonia nitrogen measurement, and particularly relates to an orthophosphate and ammonia nitrogen on-line measuring device in water treatment, which comprises a measuring machine, a touch screen is mounted on the front side of the measuring machine, a control panel is mounted on the back side of the measuring machine, and an interface end on one side of the measuring machine is linearly connected with a trans-impedance amplifier. According to the utility model, 2.00 mL of water sample is extracted from a water sample container by a first electronic liquid separator and is conveyed to a digestion cup through a multi-way angle valve; 1.00 ml of reagent A is extracted from the reagent A container by the third electronic liquid separator and is conveyed to the digestion cup through the multi-way angle valve; 1.00 ml of reagent B is extracted from the reagent B container by the fourth electronic liquid separator and is conveyed to the digestion cup through the multi-way angle valve; and 6.00 mL of pure water is extracted from the pure water container by the fifth electronic liquid separator, flows through the multi-way angle valve and is conveyed to the digestion cup. The iron wire surrounding the outer wall of the digestion cup starts heating until the temperature in the digestion cup reaches 40 DEG C, and the temperature is kept for 3 minutes;

Description

Technical Field

[0001] The utility model belongs to the technical field of phosphate and ammonia nitrogen measurement, and particularly relates to an on-line measurement device for orthophosphate and ammonia nitrogen in water treatment. Background Art

[0002] In the field of water treatment, orthophosphate and ammonia nitrogen are key indicators of water quality safety. Excessive orthophosphate can lead to eutrophication, triggering excessive algae growth and disrupting the aquatic ecological balance. Excessive ammonia nitrogen levels can be toxic to aquatic organisms and, under certain conditions, can convert into nitrite and nitrate, threatening human health. Therefore, accurate and rapid measurement of orthophosphate and ammonia nitrogen concentrations in water is crucial for ensuring water quality safety and ensuring the proper implementation of water treatment.

[0003] Existing devices often have problems with poor filtration effects and residual impurities affecting test results during water sample pretreatment. During the reaction step, the accuracy and stability of reagent addition are insufficient, resulting in incomplete or imbalanced reactions, as well as long liquid addition and reaction times. Furthermore, the entire measurement process lacks an effective cleaning and drainage mechanism, which can easily cause cross-contamination and affect the accuracy of subsequent measurements. Utility Model Content

[0004] The purpose of the utility model is to provide an online measuring device for orthophosphate and ammonia nitrogen in water treatment, aiming to solve the problems that existing devices often have poor filtration effect and impurity residue affecting the detection results in the water sample pretreatment link; in the reaction step, the accuracy and stability of reagent addition are insufficient, resulting in insufficient reaction or imbalanced reaction ratio, and long liquid addition and reaction time; and the entire measurement process lacks an effective cleaning and drainage mechanism, which easily causes cross contamination and affects the accuracy of subsequent measurements.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an online measuring device for orthophosphate and ammonia nitrogen in water treatment, comprising a measuring machine, a touch screen installed on the front of the measuring machine, a control panel installed on the back of the measuring machine, an interface end on one side of the measuring machine being linearly connected to a transimpedance amplifier, and the other side of the transimpedance amplifier being linearly connected to a photoelectric receiving converter; the optical signal receiving surface of the photoelectric receiving converter is opposite to one side of a digestion cup, the top open end of the digestion cup is opposite to a liquid supply pipe mouth on a multi-way angle valve, an interface on the multi-way angle valve is connected to the discharge port of a first electronic dispenser, the bottom of the first electronic dispenser is screwed onto the bottle mouth end of a water sample container, the bottom interface of the water sample container is docked with the liquid outlet on a first peristaltic pump, and the liquid inlet pipe mouth of the first peristaltic pump is connected to a ceramic membrane.

[0006] As an online measuring device for orthophosphate and ammonia nitrogen in water treatment of the utility model, preferably, a standard liquid container is also provided on one side of the water sample container, and a second electronic liquid dispenser is screwed on the bottle mouth of the standard liquid container, and the liquid outlet of the second electronic liquid dispenser is connected to an interface on the multi-way angle valve.

[0007] As an online measuring device for orthophosphate and ammonia nitrogen in water treatment of the utility model, preferably, a reagent A container is provided on one side of the standard liquid container, and a third electronic liquid dispenser is screwed on the bottle mouth of the reagent A container, and the liquid outlet of the third electronic liquid dispenser is connected to an interface on the multi-way angle valve.

[0008] As an online measuring device for orthophosphate and ammonia nitrogen in water treatment of the utility model, preferably, a reagent B container is provided on one side of the reagent A container, and a fourth electronic liquid dispenser is screwed on the bottle mouth of the reagent B container, and the liquid outlet of the fourth electronic liquid dispenser is connected to an interface on the multi-way angle valve.

[0009] As an online measuring device for orthophosphate and ammonia nitrogen in water treatment of the utility model, preferably, a pure water container is provided on one side of the reagent B container, a fifth electronic liquid dispenser is screwed onto the bottle mouth of the pure water container, and the liquid outlet of the fifth electronic liquid dispenser is connected to an interface on the multi-way angle valve.

[0010] As an online measuring device for orthophosphate and ammonia nitrogen in water treatment of the utility model, preferably, the bottom connecting tube of the digestion cup is installed at the output end of the second peristaltic pump, and the other end of the connecting tube passes through the second peristaltic pump and is inserted into the interior of the waste liquid barrel; a layer of electric heating wire is spirally wound on the outer wall of the digestion cup, and a light source lamp is also provided on one side of the digestion cup, and the light source lamp and the photoelectric receiving converter are symmetrically distributed on both sides of the digestion cup.

[0011] Compared with the prior art, the beneficial effects of the present invention are: water sample pretreatment step: the water sample passes through the ceramic membrane and flows through the first peristaltic pump to be transported to the water sample container, thereby improving the water sample filtration effect and solving the problem of residual impurities affecting the detection results. The specific operation process is as follows: reaction liquid configuration step: the first electronic dispenser extracts 2.00mL of water sample from the water sample container and flows through a multi-way angle valve to be transported to the digestion cup; the third electronic dispenser extracts 1.00ml of reagent A from the reagent A container and flows through a multi-way angle valve to be transported to the digestion cup; the fourth electronic dispenser extracts 1.00ml of reagent B from the reagent B container and flows through a multi-way angle valve to be transported to the digestion cup; the fifth electronic dispenser extracts 6.00mL of pure water from the pure water container and flows through a multi-way angle valve to be transported to the digestion cup. Adding liquid with an electronic dispenser can reduce residual liquid in the pipeline and improve the accuracy and stability of reagent addition. Moreover, using 5 dedicated electronic dispensers in combination with a multi-way angle valve for adding liquid can not only avoid cross-contamination and reduce the cleaning steps of the adding device, but also realize the simultaneous addition of multiple reagents, thereby shortening the addition time and improving detection efficiency.

[0012] Reaction steps: The iron wire wrapped around the outer wall of the digestion cup starts heating until the temperature inside the digestion cup reaches 40°C and is maintained for 3 minutes. Then the light emitted by the light source lamp passes through the digestion cup and reaches the photoelectric receiving converter and is received by the photoelectric receiving converter, thereby obtaining the water sample voltage. The corresponding orthophosphate (or ammonia nitrogen) concentration is found on the calibration curve. Compared with the existing technology, the detection efficiency is improved by increasing the reaction temperature and shortening the reaction time.

[0013] Discharge step: The valve at the lower port of the digestion cup is opened, and the reaction solution in the digestion cup that has been tested is transported to the waste liquid bucket by the second peristaltic pump.

[0014] During the cleaning and drainage process, the fifth electronic dispenser draws 10.00 mL of pure water from the pure water container, which is then transferred through a multi-way angle valve to the digestion cup. The valve at the lower port of the digestion cup then opens, and the cleaning solution in the cup is pumped to the waste tank by a second peristaltic pump. Compared to existing technologies, this more effective cleaning and drainage mechanism prevents cross-contamination that can affect subsequent measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 A schematic diagram of the right side structure provided in an embodiment of the present application;

[0017] Figure 2 This is a left-view structural diagram provided for an embodiment of the present application.

[0018] In the figure: 1. Measuring machine; 2. Touch screen; 3. Control panel; 4. Transimpedance amplifier; 41. Photoelectric receiving converter; 5. Digestion cup; 51. Second peristaltic pump; 52. Waste liquid bucket; 53. Light source lamp; 54. Heating wire; 6. Multi-way angle valve; 7. Water sample container; 71. First electronic dispenser; 72. Standard liquid container; 721. Second electronic dispenser; 73. Reagent A container; 731. Third electronic dispenser; 74. Reagent B container; 741. Fourth electronic dispenser; 75. Pure water container; 751. Fifth electronic dispenser; 8. First peristaltic pump; 9. Ceramic membrane. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-2 The present invention provides the following technical solution: an online measurement device for orthophosphate and ammonia nitrogen in water treatment, comprising a measuring machine 1, a touch screen 2 mounted on the front of the measuring machine 1, a control panel 3 mounted on the back of the measuring machine 1, an interface end on one side of the measuring machine 1 linearly connected to a transimpedance amplifier 4, and the other side of the transimpedance amplifier 4 linearly connected to a photoelectric receiver converter 41. The measuring machine 1 is equipped with an online orthophosphate and ammonia nitrogen measurement system. During use, the photoelectric receiver converter 41 receives refracted light from a light source lamp 53 after passing through a digestion cup 5, processes the received light through the transimpedance amplifier 4, and transmits it to the measuring machine 1. At this point, the tester can operate the corresponding test program according to the test requirements to obtain the actual orthophosphate and ammonia nitrogen contents.

[0021] The optical signal receiving surface of the photoelectric receiving converter 41 is opposite to one side of the digestion cup 5, and the top open end of the digestion cup 5 is opposite to a liquid supply pipe mouth on the multi-way angle valve 6. An interface on the multi-way angle valve 6 is connected to the discharge port of the first electronic liquid dispenser 71. The bottom of the first electronic liquid dispenser 71 is screwed onto the bottle mouth end of the water sample container 7. The bottom interface of the water sample container 7 is connected to the liquid outlet on the first peristaltic pump 8, and the liquid inlet pipe mouth of the first peristaltic pump 8 is connected to the ceramic membrane 9.

[0022] Preferably, a standard liquid container 72 is further provided on one side of the water sample container 7 , and a second electronic liquid dispenser 721 is screwed onto the bottle mouth of the standard liquid container 72 , and the liquid outlet of the second electronic liquid dispenser 721 is connected to an interface on the multi-way angle valve 6 .

[0023] In specific use, preferably: a reagent A container 73 is provided on one side of the standard liquid container 72, and the bottle mouth of the reagent A container 73 is screwed with a third electronic liquid dispenser 731, and the liquid outlet of the third electronic liquid dispenser 731 is connected to an interface on the multi-way angle valve 6.

[0024] Preferably, a reagent B container 74 is provided on one side of the reagent A container 73 , a fourth electronic liquid dispenser 741 is screwed onto the bottle mouth of the reagent B container 74 , and a liquid outlet of the fourth electronic liquid dispenser 741 is connected to an interface on the multi-way angle valve 6 .

[0025] In practice, the reagent A container 73 and reagent B container 74 in this technical solution are equipped with corresponding solutions A and B, respectively. The preparation methods for solutions A and B of the orthophosphate and ammonia nitrogen reagents are as follows: Orthophosphate stock solution: Dry high-purity potassium dihydrogen phosphate at 110°C for 2 hours and cool in a desiccator. Weigh 0.2197g, dissolve in water, and transfer to a 1000mL volumetric flask. Add 5mL of (1+1) sulfuric acid and dilute to the mark with water. This solution contains 50.0μg of phosphorus per mL.

[0026] Orthophosphate standard solution: Pipette 15.00 mL of phosphate stock solution into a 250 mL volumetric flask and dilute to the mark with water. This standard solution contains 3.00 μg of phosphorus per mL.

[0027] Orthophosphate Reagent A Solution: Weigh 18.9g of ascorbic acid into a 500mL beaker and dissolve with approximately 300mL of pure water. Transfer the solution to a 1000mL volumetric flask and dilute to the mark with pure water. Shake well. Store in a 1000mL brown bottle at low temperature. If the solution turns yellow, discard and prepare a new solution.

[0028] Orthophosphate reagent B solution:

[0029] ① Weigh 9.8g of ammonium molybdate and dissolve it in 150mL of pure water;

[0030] ② Weigh 0.26g potassium antimony tartrate and dissolve it in 50mL pure water;

[0031] ③ While stirring, add solution ① to 226 mL of sulfuric acid (1:1), then add solution ②. Transfer the mixture to a 1000 mL volumetric flask. Dilute to the mark with pure water and shake well. Store in a 1000 mL brown reagent bottle at low temperature. The shelf life is 2 months.

[0032] Ammonia nitrogen stock solution: Dry high-grade ammonium chloride at 100°C for 2 hours and cool in a desiccator. Weigh 3.8190 g and dissolve in water. Transfer to a 1000 mL volumetric flask and dilute to the mark with water. This solution should contain 1.00 mg of ammonia nitrogen per mL.

[0033] Ammonia nitrogen standard solution: Pipette 1.25 mL of ammonia nitrogen stock solution into a 250 mL volumetric flask and dilute to the mark with water. This standard solution contains 5.00 μg of ammonia nitrogen per mL.

[0034] Ammonia nitrogen reagent A solution:

[0035] ① Pour 80g of potassium sodium tartrate into a 1000mL beaker and stir with a glass rod until the powder is completely dissolved;

[0036] ② Move ① to an electronic multi-purpose furnace and heat to boiling. When 20% of the water in the solution evaporates, stop heating and cool to room temperature.

[0037] ③ Pour 80g of sodium salicylate and 0.500g of sodium nitrosoferricyanide into the above coolant, stir and dissolve with a small amount (less than 400mL) of pure water. After complete dissolution, transfer to a 1000mL volumetric flask and dilute to the scale line. Shake well and store in a 1000mL reagent bottle away from light. The shelf life is 45 days.

[0038] Ammonia Nitrogen Reagent B Solution: Weigh 37.5g of sodium hydroxide into a 1000mL beaker and dissolve with approximately 600mL of pure water. Add 2.0g of sodium dichloroisocyanurate and dissolve completely. Transfer the solution to a 1000mL volumetric flask and dilute to the mark with pure water. Shake well. Store in a 1000mL bottle away from light. The shelf life is 45 days.

[0039] Preferably, a pure water container 75 is provided on one side of the reagent B container 74 , and a fifth electronic liquid dispenser 751 is screwed onto the bottle mouth of the pure water container 75 , and the liquid outlet of the fifth electronic liquid dispenser 751 is connected to an interface on the multi-way angle valve 6 .

[0040] Preferably: the bottom connecting tube of the digestion cup 5 is installed at the output end of the second peristaltic pump 51, and the other end of the connecting tube passes through the second peristaltic pump 51 and is inserted into the interior of the waste liquid bucket 52; a layer of electric heating wire 54 is spirally wound on the outer wall of the digestion cup 5, and a light source lamp 53 is also provided on one side of the digestion cup 5, and the light source lamp 53 and the photoelectric receiving converter 41 are symmetrically distributed on both sides of the digestion cup 5.

[0041] During specific use, ① detect the 0 mark: first, the third electronic dispenser 731 extracts 1.00 ml of reagent A from the reagent A container 73, flows through the multi-way angle valve 6 and is transported to the digestion cup 5; the fourth electronic dispenser 741 extracts 1.00 ml of reagent B from the reagent B container 74, flows through the multi-way angle valve 6 and is transported to the digestion cup 5; the fifth electronic dispenser 751 extracts 8.00 mL of pure water from the pure water container 75, flows through the multi-way angle valve 6 and is transported to the digestion cup 5.

[0042] Then the heating wire 54 surrounding the outer wall of the digestion cup 5 starts heating until the temperature inside the digestion cup 5 reaches 40°C and is maintained for 3 minutes. Then the light emitted by the light source lamp 53 passes through the digestion cup 5 and reaches the photoelectric receiving converter 41 and is received by the photoelectric receiving converter 41, thereby obtaining a 0-standard voltage (reference voltage).

[0043] Finally, the valve at the lower port of the digestion cup 5 is opened, and the reaction solution in the digestion cup 5 after detection is transported to the waste liquid bucket 52 by the second peristaltic pump 51 .

[0044] ② Cleaning and drainage step: The fifth electronic liquid dispenser 751 extracts 10.00 mL of pure water from the pure water container 75 and flows through the multi-way angle valve 6 to the digestion cup 5. Then the valve at the lower port of the digestion cup 5 is opened, and the cleaning liquid in the digestion cup 5 is transported to the waste liquid bucket 52 by the second peristaltic pump 51.

[0045] ③ Detect high standards: first, the second electronic dispenser 721 extracts 2.00mL of standard liquid from the standard liquid container 72, which flows through the multi-way angle valve 6 and is transported to the digestion cup 5; the third electronic dispenser 731 extracts 1.00ml of reagent A from the reagent A container 73, which flows through the multi-way angle valve 6 and is transported to the digestion cup 5; the fourth electronic dispenser 741 extracts 1.00ml of reagent B from the reagent B container 74, which flows through the multi-way angle valve 6 and is transported to the digestion cup 5; the fifth electronic dispenser 751 extracts 6.00mL of pure water from the pure water container 75, which flows through the multi-way angle valve 6 and is transported to the digestion cup 5.

[0046] Then the heating wire 54 around the outer wall of the digestion cup 5 starts heating until the temperature inside the digestion cup 5 reaches 40°C and is maintained for 3 minutes. Then the light emitted by the light source lamp 53 passes through the digestion cup 5 and reaches the photoelectric receiving converter 41 and is received by the photoelectric receiving converter 41, thereby obtaining a high standard voltage. According to the orthophosphate (or ammonia nitrogen) concentration of the standard solution and the corresponding operating instructions Draw the calibration curve and edit the program.

[0047] Finally, the valve at the lower port of the digestion cup 5 is opened, and the reaction solution in the digestion cup 5 after detection is transported to the waste liquid bucket 52 by the second peristaltic pump 51 .

[0048] ④ Cleaning and drainage step: The fifth electronic liquid dispenser 751 extracts 10.00 mL of pure water from the pure water container 75 and flows through the multi-way angle valve 6 to the digestion cup 5. Then, the valve at the lower port of the digestion cup 5 is opened, and the cleaning liquid in the digestion cup 5 is transported to the waste liquid bucket 52 by the second peristaltic pump 51.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An on-line measuring device for orthophosphate and ammonia nitrogen in water treatment, comprising a measuring machine (1), characterized in that: The front of the measuring machine (1) is provided with a touch screen (2), and the back of the measuring machine (1) is provided with a control panel (3). One side interface end of the measuring machine (1) is linearly connected to the transimpedance amplifier (4), and the other side of the transimpedance amplifier (4) is linearly connected to the photoelectric receiving converter (41); the optical signal receiving surface of the photoelectric receiving converter (41) is opposite to one side of the digestion cup (5), the top open end of the digestion cup (5) is opposite to a liquid supply pipe opening on the multi-way angle valve (6), an interface on the multi-way angle valve (6) is connected to the discharge port of the first electronic liquid dispenser (71), the bottom of the first electronic liquid dispenser (71) is screwed to the bottle end of the water sample container (7), the bottom interface of the water sample container (7) is connected to the liquid outlet of the first peristaltic pump (8), and the liquid inlet of the first peristaltic pump (8) is connected to the ceramic membrane (9).

2. The on-line measuring device for orthophosphate and ammonia nitrogen in water treatment according to claim 1, characterized in that: A standard liquid container (72) is further provided on one side of the water sample container (7), and a second electronic liquid dispenser (721) is screwed onto the bottle mouth of the standard liquid container (72), and the liquid outlet of the second electronic liquid dispenser (721) is connected to an interface on the multi-way angle valve (6).

3. The on-line measuring device for orthophosphate and ammonia nitrogen in water treatment according to claim 2, characterized in that: A reagent A container (73) is provided on one side of the standard liquid container (72), and a third electronic liquid dispenser (731) is screwed onto the bottle mouth of the reagent A container (73), and the liquid outlet of the third electronic liquid dispenser (731) is connected to an interface on the multi-way angle valve (6).

4. The on-line measuring device for orthophosphate and ammonia nitrogen in water treatment according to claim 3, characterized in that: A reagent B container (74) is provided on one side of the reagent A container (73), and a fourth electronic liquid dispenser (741) is screwed onto the bottle mouth of the reagent B container (74), and the liquid outlet of the fourth electronic liquid dispenser (741) is connected to an interface on the multi-way angle valve (6).

5. The on-line measuring device for orthophosphate and ammonia nitrogen in water treatment according to claim 4, characterized in that: A pure water container (75) is provided on one side of the reagent B container (74), and a fifth electronic liquid dispenser (751) is screwed onto the bottle mouth of the pure water container (75), and the liquid outlet of the fifth electronic liquid dispenser (751) is connected to an interface on the multi-way angle valve (6).

6. The on-line measuring device for orthophosphate and ammonia nitrogen in water treatment according to claim 1, characterized in that: The bottom connecting tube of the digestion cup (5) is installed at the output end of the second peristaltic pump (51), and the other end of the connecting tube passes through the second peristaltic pump (51) and is inserted into the interior of the waste liquid barrel (52).

7. The on-line measuring device for orthophosphate and ammonia nitrogen in water treatment according to claim 1, characterized in that: A layer of electric heating wire (54) is spirally wound on the outer wall of the digestion cup (5), and a light source lamp (53) is also provided on one side of the digestion cup (5), and the light source lamp (53) and the photoelectric receiving converter (41) are symmetrically distributed on both sides of the digestion cup (5).

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