A rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater

Abstract

The application provides a rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater, and belongs to the technical field of wastewater detection. The method solves the technical problems of poor sampling effect and the like. The rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater comprises the following steps: preparing potassium persulfate solution and placing the solution in a storage box for standby; placing a sampling device into a sampling pool, separating part of the wastewater in the wastewater pool in a closed space by the sampling device, and then dispersing the bottom of the wastewater; after the dispersion is completed, using a suction pump to suck the wastewater into a sampling box for storage; installing the sampling box on a detection device through a quick connection mechanism, connecting the sampling box with a detection box, and then sending the wastewater in the sampling box into the detection box; and using a quantitative liquid feeding mechanism to add the potassium persulfate solution in the storage box into the detection box, and mixing and reacting the potassium persulfate solution with the wastewater. The application has the advantages of improving the detection accuracy of total nitrogen and phosphorus content and being convenient.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wastewater monitoring, and relates to a rapid detection and analysis method, in particular to a rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater. BACKGROUND

[0002] Total nitrogen includes inorganic nitrogen such as nitrate, nitrite and ammonium salt, and organic nitrogen such as protein, amino acid, ribonucleic acid, enzyme and organic amine. The total nitrogen content is one of important indexes for measuring water quality, is often used to represent the degree of water pollution by nutrients, and is one of main items for environmental water detection. Total phosphorus includes elemental phosphorus, orthophosphate, condensed sulfate, pyrophosphate, metaphosphoric acid and organic group combined phosphate. The main sources are domestic sewage, chemical fertilizer, organophosphorus pesticide and phosphate detergent used in modern detergent, etc. Excessive phosphorus will cause water pollution and peculiar smell, and cause phenomena such as lake eutrophication and red tide in bays. Therefore, it is necessary to detect total nitrogen and total phosphorus.

[0003] Through retrieval, a detection method and system for total nitrogen and total phosphorus are disclosed in Chinese patent literature (application number: 201410249295.6; publication number: CN 103983597 B). The detection method comprises the following steps: heating water sample added with potassium persulfate in an alkaline and closed environment, digesting for 1-10 minutes at 70-110°C, then changing the PH value of the water sample to an acid environment, and continuing to digest for 1-10 minutes at 125-250°C to obtain completely digested water sample, avoiding corrosion of high-temperature alkaline environment to the test vessel, and high temperature of 125-250°C accelerates the digestion process of the water sample, then determining the total nitrogen content by using existing ultraviolet spectrophotometry, and then adding ammonium molybdate reagent in the completely digested water sample, and determining the total phosphorus content in the water sample by using ammonium molybdate spectrophotometry. In this way, after the water sample is completely digested, the sequential detection of total nitrogen and total phosphorus can be achieved, the water sample does not need to be digested twice, the detection time is further accelerated, and the detection efficiency is improved.

[0004] Although the detection method disclosed in the patent can achieve the sequential detection of total nitrogen and total phosphorus after the water sample is completely digested, the water sample does not need to be digested twice, the detection time is further accelerated, and the detection efficiency is improved, but when the wastewater is stored, a sediment is generated, part of nitrogen and phosphorus substances are precipitated to the bottom, and only the liquid above is taken when sampling, so that the detection accuracy is affected. Even if part of the sediment is taken out when sampling, the proportion of the sediment and the wastewater cannot be guaranteed, and the detection accuracy is limited. SUMMARY

[0005] The present application aims at the above-mentioned problems existing in the prior art, and provides a rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater.

[0006] The object of the present application can be achieved by the following technical solutions.

[0007] The rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater comprises the following steps.

[0008] S1, prepare potassium persulfate solution and store it in a storage box for standby;

[0009] S2, place the sampling device into the sampling pool, and separate part of the wastewater in the wastewater pool in a sealed space, and then disperse the bottom of the wastewater;

[0010] S3, after the dispersion is completed, use the suction pump to suck the wastewater into the sampling box for storage;

[0011] S4, install the sampling box on the detection device through the quick connection mechanism, connect the sampling box and the detection box, and then send the wastewater in the sampling box into the detection box;

[0012] S5, use the quantitative liquid feeding mechanism to add the potassium persulfate solution in the storage box into the detection box to mix and react with the wastewater;

[0013] S6, after a period of reaction, use the first light source to emit a wavelength of 220nm light path, which passes through the detection box and is received by the first photodetector, and is sent to the circuit board assembly for signal processing and analog-to-digital conversion, and then generates test data, i.e. the total nitrogen content in the water body to be tested can be calculated;

[0014] S7, after the total nitrogen content is detected, add sodium molybdate, antimony potassium tartrate and ascorbic acid to the digestion detection pool for color development, and then use the second light source to emit a wavelength of 880nm light path, which passes through the detection box and is received by the second photodetector, and is sent to the circuit board assembly for signal processing and analog-to-digital conversion, and then generates test data, i.e. the total phosphorus content in the water body to be tested can be calculated.

[0015] In the step S5, the solution temperature is heated to 80-120℃ during the reaction, and the reaction time is 5-12min.

[0016] The first light source is a deuterium lamp, and the second light source is an LED light source.

[0017] The device used in the steps S1-S6 is a rapid detection device, which comprises a frame, a detection box fixed on the frame, a storage box fixed on the upper end of the detection box, detection windows arranged on the left and right sides of the detection box, a first mounting plate and a second mounting plate fixed on the upper side of the frame, a first light source and a second light source fixed on the first mounting plate, a first photoelectric detector and a second photoelectric detector fixed on the second detection plate, a quantitative liquid feeding mechanism arranged between the detection box and the storage box, a limiting frame fixed on the front side of the frame, a sampling box arranged in the limiting frame, a quick connection mechanism arranged between the sampling box and the detection box, a sampling device arranged on the sampling box, an air bag fixed on the periphery of the sampling box, and a handle arranged on the sampling box.

[0018] The working principle of the device is as follows: when the working environment beside the wastewater pool is suitable for the detection device to go, the sampling box is placed on the limiting frame, connected with the detection box through the quick connection mechanism, and then the device is pushed to the side of the wastewater pool through the frame, the sampling device is put into the sampling pool, part of the wastewater in the wastewater pool is separated in a closed space through the sampling device, and then the bottom of the wastewater is dispersed, after the dispersion is completed, the wastewater is pumped into the sampling box through the suction pump and then directly into the detection box, the potassium persulfate solution in the storage box is added into the detection box through the quantitative liquid feeding mechanism, and mixed with the wastewater to react; after a period of reaction, the first light source emits a wavelength of 220nm light path, which passes through the detection box and is received by the first photoelectric detector, and is sent to the circuit board assembly for signal processing and analog-digital conversion, and then test data is generated, that is, the total nitrogen content in the water body to be measured can be calculated; after the total nitrogen content is detected, sodium molybdate, antimony potassium tartrate and ascorbic acid are added into the digestion detection pool for color development, and then the second light source emits a wavelength of 880nm light path, which passes through the detection box and is received by the second photoelectric detector, and is sent to the circuit board assembly for signal processing and analog-digital conversion, and then test data is generated, that is, the total phosphorus content in the water body to be measured can be calculated; when the working environment beside the wastewater pool is not suitable for the detection device to go, the sampling device can be taken down first, put into the sampling pool, and then part of the wastewater in the wastewater pool is separated in a closed space through the sampling device, and then the bottom of the wastewater is dispersed; after the dispersion is completed, the wastewater is pumped into the sampling box through the suction pump for storage; the sampling box is installed on the detection device through the quick connection mechanism, the sampling box is communicated with the detection box, and then the wastewater in the sampling box is sent into the detection box, and the above detection steps are repeated; the device can be used in different working environments, and the sampling is uniform, which prevents the bottom sediment of the wastewater pool from affecting the accuracy of detection.

[0019] The storage box is provided with a storage cavity and a quantitative cavity, and a draw port is arranged between the quantitative cavity and the storage cavity.

[0020] With the above structure, when liquid is sent, the piston is moved by the handle, the potassium persulfate solution in the storage cavity is drawn into the quantitative cavity until the adjusting plate abuts against the side wall of the quantitative cavity, then the piston is pushed in the opposite direction, the potassium persulfate solution in the quantitative cavity is sent into the detection box through the liquid sending pipe, when the amount of liquid needs to be adjusted, the threaded rod is rotated to drive the adjusting plate to move, and the position of the adjusting plate is observed through the observation window, so that the movement distance of the piston is adjusted and limited, and different detection requirements are met.

[0021] The quick connection mechanism comprises a first quick connection assembly and a second quick connection assembly, the first quick connection assembly comprises a liquid inlet pipe, the liquid inlet pipe is communicated with the detection box, the other end of the liquid inlet pipe is fixed with a first quick connector, a first quick connection cavity is arranged in the first quick connector, a first insertion port is arranged at the end of the first quick connection cavity away from the liquid inlet pipe, a first inclined surface is arranged at the end of the first quick connection cavity close to the first insertion port, a plurality of first positioning rings are arranged in the first quick connection cavity, a first spring is fixed in the first quick connection cavity, the other end of the first spring abuts against the first positioning ring, a first positioning pipe is fixed in the first quick connection cavity, the liquid inlet pipe is communicated with the first positioning pipe, a sealing gasket is arranged in the first positioning pipe, the inlet of the sealing gasket is a horn-shaped structure, a suction pump is fixed on the sampling box, a water outlet pipe is fixed on the suction pump, the other end of the water outlet pipe is inserted into the first positioning pipe through the first insertion port and the first positioning ring in sequence, and an unlocking port communicated with the first quick connection cavity is arranged in the first quick connector.

[0022] With the above structure, when working, the other end of the water outlet pipe is inserted into the first positioning pipe through the first insertion port and the first positioning ring in sequence, and the first spring, the positioning ring and the first inclined surface are matched, so that the connection between the detection box and the sampling box is completed, the operation is simple and convenient, the inlet of the sealing gasket is a horn-shaped structure, the water outlet pipe can enter the first positioning pipe, the sealing property of the connection is ensured, and waste liquid leakage is prevented, when disassembly is needed, a screwdriver or other tools is inserted into the unlocking port, the first positioning ring is aligned, and the limiting of the liquid sending pipe is released, so that the liquid sending pipe can be easily pulled out, time and labor are saved.

[0023] The second quick connecting assembly comprises a connecting rod, one end of the connecting rod is fixedly connected with the detection box, the other end of the connecting rod is fixedly provided with a second quick connector, a second quick connecting cavity is formed in the second quick connector, a second inserting opening is formed at one end of the second quick connecting cavity away from the connecting rod, a second inclined surface is arranged at one end of the second quick connecting cavity close to the second inserting opening, a plurality of second positioning rings are arranged in the second quick connecting cavity, a second spring is fixedly arranged in the second quick connecting cavity, the other end of the second spring abuts against the second positioning ring, a second positioning tube is fixedly arranged in the second quick connecting cavity, the sampling box is fixedly provided with an inserting rod, the other end of the inserting rod is inserted into the second positioning tube through the second inserting opening and the second positioning ring in sequence, and an unlocking opening in communication with the second quick connecting cavity is formed in the second quick connector.

[0024] When the detection box is connected with the sampling box, the inserting rod is inserted into the second positioning tube through the second inserting opening and the second positioning ring in sequence, the second positioning ring is locked with the inserting rod under the action of the second spring, the second inclined surface and the second positioning ring, the sampling box is fixed, and the sampling box has high stability.

[0025] The sampling device comprises a connecting frame, the connecting frame is fixedly connected with the sampling box, a turnover motor is fixedly arranged on the connecting frame, an output shaft end of the turnover motor is fixedly provided with a turnover seat, the turnover seat is fixedly provided with a sampling seat, a telescopic pipe is fixedly arranged at the lower end of the sampling seat, a counterweight seat is fixedly arranged at the lower end of the telescopic pipe, a water pump is fixedly arranged on the sampling box, the water pump is in communication with the sampling seat through a hose, a winding mechanism is fixedly arranged in the counterweight seat, a pull rope is arranged on the winding mechanism, and the other end of the pull rope is fixedly connected with the sampling seat.

[0026] When the sampling box is installed on the frame for use, the telescopic pipe and the sampling box are parallel, the frame pushes the sampling box to the side of the wastewater pool, the telescopic pipe is placed into the wastewater pool, the winding mechanism is operated to pay out the line, the telescopic pipe sinks to the bottom of the wastewater pool under the action of the counterweight seat, the telescopic pipe separates the wastewater pool into a sealed environment, and sealed sampling is facilitated.

[0027] The counterweight seat is internally provided with an inflation cavity, a gas pump is fixedly arranged in the inflation cavity, an air inlet pipe of the gas pump is in communication with the outside through a pipeline, an air outlet end of the gas pump is fixedly provided with a gas jet pipe, and a plurality of gas jet openings are formed in the outer periphery of the gas jet pipe.

[0028] With the above structure, when the counterweight seat sinks to the bottom of the wastewater tank, the air jet pipe sprays air flow around by air pump inflation, so that the sediment at the bottom of the wastewater tank is lifted and evenly distributed, improving the uniformity of sampling.

[0029] The detection box is fixed with a partition plate, a driving cavity is formed between the lower side of the partition plate and the detection box, a rotary motor is fixed in the driving cavity, the output shaft end of the rotary motor is fixed with a rotating disc, the rotating disc is fixed with a first magnet and a second magnet, a rotating ring is rotatably connected to the upper side of the partition plate, the rotating ring is composed of a third magnet and a fourth magnet, a stirring column is fixed on the rotating ring, a plurality of stirring blades are fixed on the stirring column, an elastic assembly is fixed on the upper side of the partition plate, an ejection plate is fixed on the elastic assembly, a plurality of trapezoidal seats are annularly distributed on the upper side of the ejection plate, a support rod is fixed on the stirring column, a rotating wheel is rotatably connected to the support rod, and the rotating wheel is attached to the trapezoidal seat.

[0030] With the above mechanism, during work, the rotary motor drives the first magnet and the second magnet to rotate through the rotating disc, the first magnet and the third magnet are attracted, and the second magnet and the fourth magnet are attracted, so that the stirring blades are driven to rotate through the rotating ring, the reaction liquid is stirred and mixed, the effect of the reaction is improved, the structure can prevent the stirring blades from blocking the detection window, ensure the normal operation of the detection work, and the rotary motor and the stirring blades are not in contact, so that the temperature of the internal reaction liquid is not transmitted to the rotary motor, the stability of the work is ensured, when the stirring column rotates, the rotating wheel rotates, the cooperation between the rotating wheel and the trapezoidal seat can press down the ejection plate, the spring ejection plate is lifted under the action of the elastic assembly, so that the sediment at the bottom is lifted, and the effect of the reaction is improved.

[0031] Compared with the prior art, the rapid detection and analysis method of total nitrogen and phosphorus content in the fertilizer industry wastewater has the following advantages:

[0032] 1. The detection method of the present application can evenly distribute the nitrogen and phosphorus in the wastewater during sampling, ensuring the accuracy of the sampling, thereby ensuring the accuracy of the detection, and without the need to disturb all the wastewater in the wastewater tank, reducing the detection cost and difficulty, this method can be used in different working environments, and can make the sampling more uniform, preventing the sediment at the bottom of the wastewater tank from affecting the accuracy of the detection.

[0033] 2、When the working environment beside the wastewater pool is suitable for the detection device to go, the sampling box is placed on the limiting frame, connected with the detection box through the quick connection mechanism, and then the device is pushed to the side of the wastewater pool through the frame, the sampling device is put into the sampling pool, part of the wastewater in the wastewater pool is separated in a closed space, then the bottom of the wastewater is dispersed, after the dispersion is completed, the wastewater is pumped into the sampling box and then directly into the detection box, the potassium persulfate solution in the storage box is added into the detection box through the quantitative liquid feeding mechanism, and mixed with the wastewater for reaction; after a period of reaction, the first light source emits a wavelength of 220nm light path, which passes through the detection box and is received by the first photodetector, and is sent to the circuit board assembly for signal processing and analog-digital conversion, and then test data is generated, that is, the total nitrogen content in the water body to be measured can be calculated; after the total nitrogen content is detected, sodium molybdate, antimony potassium tartrate and ascorbic acid are added to the digestion detection pool for color development, and then the second light source emits a wavelength of 880nm light path, which passes through the detection box and is received by the second photodetector, and is sent to the circuit board assembly for signal processing and analog-digital conversion, and then test data is generated, that is, the total phosphorus content in the water body to be measured can be calculated; when the working environment beside the wastewater pool is not suitable for the detection device to go, the sampling device can be taken down first, put into the sampling pool, and the sampling device separates part of the wastewater in the wastewater pool in a closed space, and then disperses the bottom of the wastewater; after the dispersion is completed, the wastewater is pumped into the sampling box for storage; the sampling box is installed on the detection device through the quick connection mechanism, the sampling box is communicated with the detection box, and then the wastewater in the sampling box is sent into the detection box, and the above detection steps are repeated; the device can be used in different working environments, and the sampling is uniform, and the accuracy of detection is prevented from being affected by the sediment at the bottom of the wastewater pool.

[0034] 3、When feeding liquid, the piston is moved by pulling the handle, the potassium persulfate solution in the storage cavity is extracted to the quantitative cavity, until the adjusting plate is in contact with the side wall of the quantitative cavity, then the piston is pushed in the opposite direction, the potassium persulfate solution in the quantitative cavity is sent into the detection box through the liquid feeding pipe, when the amount of liquid feeding needs to be adjusted, the adjusting plate is moved by rotating the threaded rod, and the position of the adjusting plate is observed through the observation window, so as to accurately adjust and limit the movement distance of the piston, meet the different detection needs.

[0035] 4. In operation, the other end of the water outlet pipe is inserted into the first positioning pipe through the first insertion port and the first positioning ring in sequence, and the connection between the detection box and the sampling box is completed by cooperation of the first spring, the positioning ring and the first inclined surface, which is simple and convenient, the inlet of the sealing gasket is a horn-shaped structure to facilitate the water outlet pipe to enter the first positioning pipe, and the sealing property of the connection is ensured to prevent waste liquid leakage, when disassembly is needed, the first positioning ring is pushed straight by inserting a screwdriver or other tools into the unlocking port, so that the positioning of the liquid feeding pipe is released, and the liquid feeding pipe can be easily pulled out, saving time and effort.

[0036] 5. When the sampling box is installed on the frame for use, the telescopic pipe and the sampling box are parallel, the frame pushes the sampling box to the side of the wastewater pool, the telescopic pipe is placed into the wastewater pool, and then the pay-off mechanism operates, under the action of the counterweight seat, the telescopic pipe sinks to the bottom of the wastewater pool, so that the telescopic pipe separates the wastewater pool into a sealed environment, facilitating sealed sampling, when the sampling box works alone, the sampling box is directly placed in the wastewater pool, under the action of the air bag, the sampling box floats to the water surface, and then the telescopic pipe and the sampling box are perpendicular through cooperation of the overturning motor and the overturning seat, and then the above operation is repeated for sampling, which can not only meet different use requirements, but also can wind up the telescopic pipe when not in use, so that space is not occupied, and transfer and storage are facilitated.

[0037] 6. When the counterweight seat sinks to the bottom of the wastewater pool, the air jet pipe sprays air flow to the surrounding through air inflation of the air pump, so that the sediment at the bottom of the wastewater pool is stirred up, and the uniformity of sampling is improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is the process flow chart of the present application.

[0039] Figure 2 is the structural schematic diagram of the rapid detection equipment in the present application.

[0040] Figure 3 is the structural schematic diagram of the storage box in the present application.

[0041] Figure 4 is the structural schematic diagram of the sampling box in the present application.

[0042] Figure 5 is the structural schematic diagram of the sampling equipment in the present application.

[0043] Figure 6 is the structural schematic diagram of the detection box in the present application.

[0044] Figure 7 is the structural schematic diagram of the ejection plate in the present application.

[0045] Figure 8This is a schematic diagram of the structure of the second quick-connect component in this invention.

[0046] Figure 9 This is a schematic diagram of the structure of the first quick-connect component in this invention.

[0047] In the diagram, 1. Frame; 2. Detection box; 3. First mounting plate; 4. First light source; 5. Second light source; 6. Second mounting plate; 7. Second photoelectric detector; 8. First photoelectric detector; 9. Storage box; 10. Liquid delivery pipe; 11. Liquid inlet pipe; 12. Storage chamber; 13. Metering chamber; 14. Extraction port; 15. Discharge port; 16. Piston; 17. Threaded rod; 18. Handle; 19. Adjustment plate; 20. Observation window; 21. Detection window; 22. First quick connector; 23. Connecting rod; 24. Second quick connector; 25. Sampling box; 26. Suction pump; 27. Water outlet pipe; 28. Handle; 29. ​​Connecting rod; 30. Airbag; 31. Connecting frame; 32. Tilting motor; 33. Tilting base; 34. Sampling seat; 35. Telescopic tube; 36. Counterweight seat; 37. Water pump; 38. Pull rope; 39. Inflation chamber; 40. Air pump; 41. Air jet pipe; 42. Baffle; 43. Rotary motor; 44. Rotary disk; 45. First magnet; 46. Second magnet; 47. Fourth magnet; 48. Third magnet; 49. Stirring column; 50. Stirring blade; 51. Elastic component; 52. Support rod; 53. Ejector plate; 54. Rotary wheel; 55. Trapezoidal seat; 56. Second insertion port; 57. Second positioning ring; 58. Second positioning tube; 59. Second spring; 60. First insertion port; 61. First positioning ring; 62. First spring; 63. First positioning tube; 64. Sealing gasket; 65. Winding mechanism. Detailed Implementation

[0048] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0049] like Figures 1-9 As shown, the rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater includes the following steps:

[0050] S1. Prepare potassium persulfate solution and place it in storage box 9 for later use;

[0051] S2. Place the sampling device into the sampling pool. The sampling device will separate a portion of the wastewater into a closed space in the wastewater pool and then disperse the wastewater at the bottom.

[0052] S3. After dispersion, the wastewater is pumped into the sampling box 25 by the suction pump 26 for storage.

[0053] S4, install the sampling box 25 on the detection equipment through the quick connection mechanism, communicate the sampling box 25 with the detection box 2, and then send the wastewater in the sampling box 25 into the detection box 2;

[0054] S5, add the potassium persulfate solution in the storage box 9 into the detection box 2 through the quantitative liquid feeding mechanism, and mix and react with the wastewater;

[0055] S6, after a period of reaction, the first light source 4 emits a light path with a wavelength of 220nm, passes through the detection box 2, is received by the first photodetector 8, is sent to the circuit board assembly for signal processing and analog-digital conversion, and then generates test data, so that the total nitrogen content in the water body to be measured can be calculated;

[0056] S7, after the total nitrogen content is detected, sodium molybdate, potassium antimony tartrate and ascorbic acid are added to the digestion detection tank for color development, the second light source 5 emits a light path with a wavelength of 880nm, passes through the detection box 2, is received by the second photodetector 7, is sent to the circuit board assembly for signal processing and analog-digital conversion, and then generates test data, so that the total phosphorus content in the water body to be measured can be calculated.

[0057] In the step S5, the solution temperature is heated to 80-120℃ during the reaction, and the reaction time is 5-12min.

[0058] The first light source 4 is a deuterium lamp, and the second light source 5 is an LED light source.

[0059] The equipment used in the steps S1-S6 is a rapid detection equipment, which includes a vehicle frame 1, the vehicle frame 1 is fixed with a detection box 2, the upper end of the detection box 2 is fixed with a storage box 9, the left and right sides of the detection box 2 are both provided with detection windows 21, the upper side of the vehicle frame 1 is fixed with a first mounting plate 3 and a second mounting plate 6, the first mounting plate 3 is fixed with a first light source 4 and a second light source 5, the second detection plate is fixed with a first photodetector 8 and a second photodetector 7, a quantitative liquid feeding mechanism is arranged between the detection box 2 and the storage box 9, a limiting frame is fixed on the front side of the vehicle frame 1, a sampling box 25 is arranged in the limiting frame, a quick connection mechanism is arranged between the sampling box 25 and the detection box 2, a sampling device is arranged on the sampling box 25, an air bag 30 is fixed on the periphery of the sampling box 25, and a handle 28 is arranged on the sampling box 25.

[0060] The working principle of the present application is that when the working environment beside the wastewater pool is suitable for the detection equipment to go, the sampling box 25 is placed on the limiting frame, connected with the detection box 2 through the quick connection mechanism, and then the device is pushed to the side of the wastewater pool through the vehicle frame 1, the sampling equipment is put into the sampling pool, and part of the wastewater in the wastewater pool is separated in a closed space, then the bottom of the wastewater is dispersed, after the dispersion is completed, the wastewater is pumped into the sampling box 25 by the suction pump 26 and then directly sent into the detection box 2, the potassium persulfate solution in the storage box 9 is added into the detection box 2 through the quantitative liquid feeding mechanism and mixed with the wastewater for reaction; after a period of reaction, the first light source 4 emits a light path with a wavelength of 220nm, which passes through the detection box 2 and is received by the first photodetector 8, and then is sent to the circuit board assembly for signal processing and analog-digital conversion, and then test data is generated, that is, the total nitrogen content in the water body to be measured can be calculated; after the total nitrogen content is detected, sodium molybdate, potassium antimony tartrate and ascorbic acid are added into the digestion detection pool for color development, and then the second light source 5 emits a light path with a wavelength of 880nm, which passes through the detection box 2 and is received by the second photodetector 7, and then is sent to the circuit board assembly for signal processing and analog-digital conversion, and then test data is generated, that is, the total phosphorus content in the water body to be measured can be calculated; when the working environment beside the wastewater pool is not suitable for the detection equipment to go, the sampling equipment can be taken down first, put into the sampling pool, and then part of the wastewater in the wastewater pool is separated in a closed space, and then the bottom of the wastewater is dispersed; after the dispersion is completed, the wastewater is pumped into the sampling box 25 by the suction pump 26 for storage; the sampling box 25 is installed on the detection equipment through the quick connection mechanism, the sampling box 25 is communicated with the detection box 2, and then the wastewater in the sampling box 25 is sent into the detection box 2, and the above detection steps are repeated, so that the device can be applied to different working environments, and the sampling is uniform, and the accuracy of detection is prevented from being affected by the sediment at the bottom of the wastewater pool.

[0061] The storage box 9 is provided with a storage cavity 12 and a quantitative cavity 13, and a suction port 14 is formed between the storage cavity 12 and the quantitative cavity 13; the quantitative liquid feeding mechanism comprises a piston 16 slidingly connected in the quantitative cavity 13, a threaded rod 17 rotatably connected to the piston 16, a handle 18 fixed to the other end of the threaded rod 17 and extending out of the storage box 9, an adjusting plate 19 threadedly connected to the threaded rod 17, and a discharge port 15 formed at the lower end of the quantitative cavity 13 and fixedly connected with a liquid feeding pipe 10; the lower end of the liquid feeding pipe 10 is communicated with the detection box 2, one-way valves are arranged in the discharge port 15 and the suction port 14, an observation window 20 is arranged on the quantitative cavity 13, and a scale is arranged on the observation window 20.

[0062] With the above structure, when sending liquid, the potassium persulfate solution in the storage cavity 12 is extracted to the quantitative cavity 13 by pulling the handle 18 to move the piston 16, until the adjusting plate 19 is in contact with the side wall of the quantitative cavity 13, then the potassium persulfate solution in the quantitative cavity 13 is sent into the detection box 2 through the liquid sending pipe 10 by pushing the piston 16 in the opposite direction, when it is necessary to adjust the amount of liquid sent, the threaded rod 17 is rotated to drive the adjusting plate 19 to move, and the position of the adjusting plate 19 is observed through the observation window 20, so as to facilitate accurate adjustment and realize the adjustment limit of the moving distance of the piston 16, so as to meet different detection requirements.

[0063] The quick connection mechanism comprises a first quick connection assembly and a second quick connection assembly, the first quick connection assembly comprises a liquid inlet pipe 11, the liquid inlet pipe 11 is communicated with the detection box 2, the other end of the liquid inlet pipe 11 is fixed with a first quick connector 22, a first quick connection cavity is formed in the first quick connector 22, a first insertion port 60 is formed at the end of the first quick connection cavity away from the liquid inlet pipe 11, a first inclined surface is arranged at the end of the first quick connection cavity close to the first insertion port 60, a plurality of first positioning rings 61 are arranged in the first quick connection cavity, a first spring 62 is fixed in the first quick connection cavity, the other end of the first spring 62 is in contact with the first positioning ring 61, a first positioning pipe 63 is fixed in the first quick connection cavity, the liquid inlet pipe 11 is communicated with the first positioning pipe 63, a sealing gasket 64 is arranged in the first positioning pipe 63, the inlet of the sealing gasket 64 is in a horn-shaped structure, a suction pump 26 is fixed on the sampling box 25, a water outlet pipe 27 is fixed on the suction pump 26, the other end of the water outlet pipe 27 is inserted into the first positioning pipe 63 through the first insertion port 60 and the first positioning ring 61 in sequence, and an unlocking port is formed in the first quick connector 22 and communicated with the first quick connection cavity.

[0064] With the above structure, when working, the other end of the water outlet pipe 27 is inserted into the first positioning pipe 63 through the first insertion port 60 and the first positioning ring 61 in sequence, and the connection between the detection box 2 and the sampling box 25 is completed by the cooperation of the first spring 62, the positioning ring and the first inclined surface, which is simple and convenient to operate, the inlet of the sealing gasket 64 is in a horn-shaped structure, which facilitates the entry of the water outlet pipe 27 into the first positioning pipe 63, and ensures the sealing of the connection and prevents leakage of waste liquid, when it is necessary to disassemble, a screwdriver or other tools is inserted into the unlocking port to align the first positioning ring 61, so that the positioning of the liquid sending pipe 10 is released, and the liquid sending pipe 10 can be easily pulled out, saving time and effort.

[0065] The second quick connecting assembly comprises a connecting rod 23, one end of the connecting rod 23 is fixedly connected with the detection box 2, the other end of the connecting rod 23 is fixedly connected with a second quick connector 24, a second quick connecting cavity is formed in the second quick connector 24, a second inserting opening 56 is formed in the end of the second quick connecting cavity away from the connecting rod 23, a second inclined surface is arranged in the end of the second quick connecting cavity close to the second inserting opening 56, a plurality of second positioning rings 57 are arranged in the second quick connecting cavity, a second spring 59 is fixedly arranged in the second quick connecting cavity, the other end of the second spring 59 abuts against the second positioning ring 57, a second positioning pipe 58 is fixedly arranged in the second quick connecting cavity, a plug-in rod 29 is fixedly arranged on the sampling box 25, the other end of the plug-in rod 29 is inserted into the second positioning pipe 58 after sequentially passing through the second inserting opening 56 and the second positioning ring 57, and an unlocking opening is formed in the second quick connector 24 and communicates with the second quick connecting cavity.

[0066] When the detection box 2 is connected with the sampling box 25, the plug-in rod 29 is inserted into the second positioning pipe 58 after sequentially passing through the second inserting opening 56 and the second positioning ring 57, the second positioning ring 57 locks the plug-in rod 29 under the action of the second spring 59, the second inclined surface and the second positioning ring 57, the sampling box 25 is fixed, the sampling box 25 has high stability in cooperation with the first quick connecting assembly, and the sampling box 25 can be disassembled by the same operation mode as the first quick connecting assembly, which is simple and convenient.

[0067] The sampling device comprises a connecting frame 31, the connecting frame 31 is fixedly connected with the sampling box 25, a turnover motor 32 is fixedly arranged on the connecting frame 31, a turnover seat 33 is fixedly arranged on the output shaft end of the turnover motor 32, a sampling seat 34 is fixedly arranged on the turnover seat 33, an extension pipe 35 is fixedly arranged on the lower end of the sampling seat 34, a counterweight seat 36 is fixedly arranged on the lower end of the extension pipe 35, a water pump 37 is fixedly arranged on the sampling box 25, the water pump 37 communicates with the sampling seat 34 through a hose, a winding mechanism 65 is fixedly arranged in the counterweight seat 36, a pull rope 38 is arranged on the winding mechanism 65, and the other end of the pull rope 38 is fixedly connected with the sampling seat 34.

[0068] With the above structure, when the sampling box 25 is installed on the frame 1 for use, the telescopic pipe 35 is parallel to the sampling box 25, the frame 1 pushes the sampling box 25 to the side of the wastewater pool, the telescopic pipe 35 is placed into the wastewater pool, and then the pay-off mechanism 65 is operated to pay off the wire, under the action of the counterweight seat 36, the telescopic pipe 35 sinks to the bottom of the wastewater pool, so that the telescopic pipe 35 separates the wastewater pool into a sealed environment, facilitating sealed sampling. When the sampling box 25 works alone, the sampling box 25 is directly placed in the wastewater pool, under the action of the air bag 30, the sampling box 25 floats to the water surface, and then the telescopic pipe 35 is perpendicular to the sampling box 25 through the cooperation of the overturning motor 32 and the overturning seat 33, and then the above operation is repeated for sampling. Not only can different use requirements be met, but also the telescopic pipe 35 can be retracted when not in use, without occupying space, facilitating transfer and storage.

[0069] The counterweight seat 36 is internally provided with an inflation cavity 39, the inflation cavity 39 is fixed with an air pump 40, the air inlet pipe of the air pump 40 is communicated with the outside through a pipeline, and the air outlet end of the air pump 40 is fixed with a jet pipe 41, and the outer periphery of the jet pipe 41 is provided with a plurality of jet ports.

[0070] With the above structure, when the counterweight seat 36 sinks to the bottom of the wastewater pool, the air pump 40 is inflated to make the jet pipe 41 spray air flow to the surrounding, so as to stir up the sediment at the bottom of the wastewater pool, so as to improve the uniformity of sampling.

[0071] The detection box 2 is fixed with a partition plate 42, a driving cavity is formed between the lower side of the partition plate 42 and the detection box 2, a rotating motor 43 is fixed in the driving cavity, the output shaft end of the rotating motor 43 is fixed with a rotating disc 44, the rotating disc 44 is fixed with a first magnet 45 and a second magnet 46, a rotating ring is rotatably connected to the upper side of the partition plate 42, the rotating ring is composed of a third magnet 48 and a fourth magnet 47, a stirring column 49 is fixed on the rotating ring, a plurality of stirring blades 50 are fixed on the stirring column 49, an elastic assembly 51 is fixed on the upper side of the partition plate 42, a shooting plate 53 is fixed on the elastic assembly 51, a plurality of trapezoidal seats 55 are annularly distributed on the upper side of the shooting plate 53, a supporting rod 52 is fixed on the stirring column 49, a rotating wheel 54 is rotatably connected to the supporting rod 52, and the rotating wheel 54 is attached to the trapezoidal seat 55.

[0072] With the above mechanism, in working, the rotating motor 43 drives the first magnet 45 and the second magnet 46 to rotate through the rotating disc 44, the first magnet 45 and the third magnet 48 are adsorbed, the second magnet 46 and the fourth magnet 47 are adsorbed, so as to drive the stirring blade 50 to rotate through the rotating ring, the reaction liquid is stirred and mixed, the effect of the reaction is improved, meanwhile, the structure is arranged, the stirring blade 50 can prevent the detection window 21 from being shielded, the normal detection work is ensured, the rotating motor 43 and the stirring blade 50 are not in contact, the temperature of the internal reaction liquid cannot be transmitted to the rotating motor 43, the stability of the work is ensured, when the stirring column 49 rotates, the runner 54 rotates, the runner 54 cooperates with the trapezoidal seat 55, the elastic spring plate 53 can be pressed down, the elastic spring plate 53 is popped up under the action of the elastic assembly 51, so that the bottom sediment is lifted, the effect of the reaction is improved.

[0073] The specific embodiments described herein are merely illustrative of the principles of this application. Numerous modifications or adaptations will be readily apparent to those skilled in the art of this application without departing from the spirit or scope of the application as defined by the following claims.

Claims

1. A rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater, characterized in that, Includes the following steps: S1. Prepare potassium persulfate solution and store it in storage box (9) for later use; S2. Place the sampling device into the wastewater tank. The sampling device will separate a portion of the wastewater into a closed space in the wastewater tank, and then disperse the wastewater at the bottom. S3. After dispersion, the wastewater is pumped into the sampling box (25) by the suction pump (26) for storage. S4. Install the sampling box (25) on the rapid detection equipment through the quick connection mechanism, connect the sampling box (25) to the detection box (2), and then send the wastewater in the sampling box (25) into the detection box (2); S5. Using a quantitative liquid delivery mechanism, the potassium persulfate solution in the storage box (9) is added to the detection box (2) to mix and react with the wastewater; S6. After a period of reaction, the first light source (4) emits a light path with a wavelength of 220nm. After passing through the detection box (2), the light is received by the first photodetector (8) and sent to the circuit board assembly for signal processing and analog-to-digital conversion. Then, test data is generated, and the total nitrogen content in the water body to be tested can be calculated. S7. After the total nitrogen content is detected, sodium molybdate, potassium antimony tartrate and ascorbic acid are added to the digestion test tank for color development. Then, the second light source (5) emits light with a wavelength of 880nm. After passing through the test box (2), the light is received by the second photodetector (7) and sent to the circuit board assembly for signal processing and analog-to-digital conversion. Then, test data is generated, and the total phosphorus content in the water body to be tested can be calculated. The equipment used in steps S1-S6 is a rapid testing device. The rapid testing device includes a frame (1), a testing box (2) is fixed on the frame (1), a storage box (9) is fixed on the upper end of the testing box (2), testing windows (21) are provided on both the left and right sides of the testing box (2), a first mounting plate (3) and a second mounting plate (6) are fixed on the upper side of the frame (1), a first light source (4) and a second light source (5) are fixed on the first mounting plate (3), a first photodetector (8) and a second photodetector (7) are fixed on the second testing plate, a quantitative liquid delivery mechanism is provided between the testing box (2) and the storage box (9), a limit frame is fixed on the front side of the frame (1), a sampling box (25) is set in the limit frame, a quick connection mechanism is provided between the sampling box (25) and the testing box (2), a sampling device is provided on the sampling box (25), an airbag (30) is fixed on the outer periphery of the sampling box (25), and a handle (28) is provided on the sampling box (25). The quick-connect mechanism includes a first quick-connect component and a second quick-connect component. The first quick-connect component includes an inlet pipe (11) that is connected to the detection box (2). The other end of the inlet pipe (11) is fixed with a first quick connector (22). The first quick connector (22) has a first quick-connect cavity. The end of the first quick-connect cavity away from the inlet pipe (11) has a first insertion port (60). The end of the first quick-connect cavity near the first insertion port (60) has a first inclined surface. The first quick-connect cavity has a plurality of first positioning rings (61). The first quick-connect cavity has a first spring (62) fixed inside it. The other end of the first spring (62) has a first positioning ring (61) that is fixed inside it. The first positioning tube (63) is fixed inside the first quick-connect cavity, which is in contact with the first positioning ring (61). The liquid inlet tube (11) is connected to the first positioning tube (63). The first positioning tube (63) is provided with a sealing gasket (64). The inlet of the sealing gasket (64) is a funnel-shaped structure. The sampling box (25) is fixed with a suction pump (26). The suction pump (26) is fixed with a water outlet tube (27). The other end of the water outlet tube (27) passes through the first insertion port (60) and the first positioning ring (61) in sequence and is inserted into the first positioning tube (63). The first quick connector (22) is provided with an unlocking port that is connected to the first quick-connect cavity. The second quick-connect assembly includes a connecting rod (23), one end of which is fixedly connected to the detection box (2), and the other end of which is fixedly connected to a second quick connector (24). The second quick connector (24) has a second quick-connect cavity, and the end of the second quick connector cavity away from the connecting rod (23) has a second insertion port (56). The end of the second quick connector cavity near the second insertion port (56) has a second inclined surface. The second quick connector cavity has several second positioning rings (57). The second quick connector cavity has a second spring (59) fixed inside. The other end of the second spring (59) abuts against the second positioning ring (57). The second quick connector cavity has a second positioning tube (58) fixed inside. The sampling box (25) has a plug rod (29) fixed on it. The other end of the plug rod (29) passes through the second insertion port (56) and the second positioning ring (57) in sequence and is inserted into the second positioning tube (58). The second quick connector (24) has an unlocking port that communicates with the second quick connector cavity.

2. The rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater according to claim 1, characterized in that, In step S5, the solution temperature is heated to 80-120℃ during the reaction, and the reaction time is 5-12 minutes.

3. The rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater according to claim 1, characterized in that, The first light source (4) is a deuterium lamp, and the second light source (5) is an LED light source.

4. The rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater according to claim 1, characterized in that, The storage box (9) has a storage cavity (12) and a quantitative cavity (13). A extraction port (14) is provided between the quantitative cavity (13) and the storage cavity (12). The quantitative liquid delivery mechanism includes a piston (16) slidably connected in the quantitative cavity (13). A threaded rod (17) is rotatably connected to the piston (16). The other end of the threaded rod (17) extends out of the storage box (9) and is fixed with a handle (18). An adjusting plate (19) is threadedly connected to the threaded rod (17). The adjusting plate (19) is slidably connected to the quantitative cavity (13). A discharge port (15) is provided at the lower end of the quantitative cavity (13). A liquid delivery pipe (10) is fixedly connected to the discharge port (15). The lower end of the liquid delivery pipe (10) is connected to the detection box (2). A one-way valve is provided in both the discharge port (15) and the extraction port (14). An observation window (20) is provided on the quantitative cavity (13). A scale is provided on the observation window (20).

5. The rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater according to claim 1, characterized in that, The sampling device includes a connecting frame (31), which is fixedly connected to the sampling box (25). A flip motor (32) is fixed on the connecting frame (31). A flip seat (33) is fixed at the output shaft end of the flip motor (32). A sampling seat (34) is fixed on the flip seat (33). A telescopic tube (35) is fixed at the lower end of the sampling seat (34). A counterweight seat (36) is fixed at the lower end of the telescopic tube (35). A water pump (37) is fixed on the sampling box (25). The water pump (37) is connected to the sampling seat (34) through a hose. A winding mechanism (65) is fixed inside the counterweight seat (36). A pull rope (38) is provided on the winding mechanism (65). The other end of the pull rope (38) is fixedly connected to the sampling seat (34).

6. The rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater according to claim 5, characterized in that, The counterweight (36) has an air chamber (39) inside, and an air pump (40) is fixed inside the air chamber (39). The air inlet pipe of the air pump (40) is connected to the outside through a pipe. The air outlet end of the air pump (40) is fixed with a jet pipe (41), and several jet ports are opened on the outer periphery of the jet pipe (41).

7. The rapid detection and analysis method for total nitrogen and phosphorus content in fertilizer industrial wastewater according to claim 1, characterized in that, The detection box (2) is fixed with a partition (42). A drive cavity is formed between the lower side of the partition (42) and the detection box (2). A rotary motor (43) is fixed in the drive cavity. A rotating disk (44) is fixed at the output shaft end of the rotary motor (43). A first magnet (45) and a second magnet (46) are fixed on the rotating disk (44). A rotating ring is rotatably connected to the upper side of the partition (42). The rotating ring is composed of a third magnet (48) and a fourth magnet (47). A stirring column (49) is fixed on the rotating ring. Several stirring blades (50) are fixed on the stirring column (49). An elastic component (51) is fixed to the upper side of the partition (42). A catapult plate (53) is fixed to the elastic component (51). Several trapezoidal seats (55) are distributed in a ring on the upper side of the catapult plate (53). A support rod (52) is fixed to the stirring column (49). A rotating wheel (54) is rotatably connected to the support rod (52). The rotating wheel (54) is in contact with the trapezoidal seat (55).

Images