Intelligent environment-friendly lime dosage on-site rapid detection device and use method thereof

Abstract

The invention discloses an intelligent environment-friendly lime dosage on-site rapid detection device and a use method thereof, and relates to the technical field of lime detection. Comprising a comprehensive control system and an operation treatment system, a liquid crystal screen and a main power switch are installed on the top face above the comprehensive control system, a calculator is installed in the comprehensive control system, and a potassium oxalate volumetric flask, an ammonium chloride volumetric flask and a tail gas treatment device are installed in the operation treatment system. The potassium oxalate volumetric flask, the ammonium chloride volumetric flask and the tail gas treatment device are sequentially arranged from left to right, a reaction container and an electronic scale are mounted outside the operation treatment system and are sequentially arranged from left to right, a stirrer is mounted at the midpoint position of the bottom surface of the reaction container, and four electrodes are spirally and rotatably mounted on the reaction container from bottom to top; and an ultrasonic generator and a thermostat are arranged below the reaction container. The device disclosed by the invention can realize an integrated function of self-stirring, self-titration, self-measurement and self-cleaning, can quickly detect the lime dosage on site, and improves the detection rate and precision.

Description

Technical Field

[0001] The present invention relates to the technical field of lime detection, and in particular to an intelligent and environmentally friendly on-site rapid detection device for lime dosage and a use method thereof. Background Art

[0002] Lime-stabilized soil, as an important building material, plays an indispensable role in transportation infrastructure construction. It is widely used in roadbeds, pavement bases, tunnel foundations, and bridge foundations, effectively improving the strength, stability, and durability of transportation infrastructure. Lime dosage is crucial in lime-stabilized soil. Accurately measuring lime dosage in lime-stabilized soil can ensure project quality, optimize construction processes, and reduce project costs.

[0003] Traditional devices for measuring lime dosage include EDTA titrators and direct-reading calcium analyzers. EDTA titrators have the following drawbacks: low measurement efficiency, complex operation, subjective test results, and the ability to only perform tests in a laboratory. They also generate ammonia gas, contaminating the environment, and the reagents used are disposable and cannot be recycled. Direct-reading calcium analyzers, on the other hand, suffer from insufficient stirring uniformity, uncontrollable stirring speed, and temperature-dependent measurement results. Summary of the Invention

[0004] In order to solve the above technical problems, it is of great significance to improve the strength of the roadbed and pavement and ensure that the roadbed and base layer achieve the best physical and mechanical properties. To solve the above problems, the technical solution adopted by the present invention is: An intelligent and environmentally friendly on-site rapid detection device for lime dosage includes an integrated control system and an operation processing system for controlling operations and displaying test results. An LCD screen and a main power switch are installed on the top surface of the integrated control system, and a calculator is installed inside. The operation processing system includes an internally arranged potassium oxalate volumetric flask, an ammonium chloride volumetric flask, an exhaust gas treatment device, and an externally arranged reaction container and an electronic scale. The potassium oxalate volumetric flask and the ammonium chloride volumetric flask are respectively connected to the reaction container through a conveying mechanism, the reaction container is connected to the inside of the exhaust gas treatment device through a pipeline, and the exhaust gas treatment device is connected to the ammonium chloride volumetric flask through a conveying mechanism; the reaction container is connected to the inside of the exhaust gas treatment device through a pipeline, and the exhaust gas treatment device is connected to the ammonium chloride volumetric flask through a conveying mechanism; A water inlet and a soil inlet are provided at the upper end of the container, and valve switches are provided at the upper ends of the water inlet and the soil inlet. An agitator is provided in the center of the reaction container, and a first electrode for measuring the pH value of the solution is provided above the top of the agitator. An ultrasonic generator and a thermostat are provided at the bottom of the reaction container, and the reaction container is connected to a drainage pipe through a drainage pipe valve. Four second electrodes for measuring conductivity are spirally installed on the inner wall of the reaction container from bottom to top. A pH meter and an air pressure balancer are provided inside the exhaust gas treatment device. Liquid addition and exhaust ports are provided at the upper ends of the exhaust gas treatment device, potassium oxalate volumetric flask, and ammonium chloride volumetric flask, and valve switches are provided at the upper ends of the liquid addition and exhaust ports.

[0005] Preferably, the delivery mechanism includes an infusion pipeline and a peristaltic pump arranged on the infusion pipeline.

[0006] Preferably, the stirrer comprises a stainless steel hollow iron rod and a plurality of stirring blades installed around the stainless steel hollow iron rod, and the lower end of the stirrer is connected to a driver for driving rotation provided at the bottom of the reaction container.

[0007] Preferably, the first electrode is arranged at the center of the upper end of the stainless steel hollow iron rod, and a hollow protective cover is provided on the outside of the first electrode.

[0008] Preferably, the four second electrodes divide the height of the reaction container into five equal parts in the longitudinal direction and divide the radius of the reaction container into five equal parts in the plane, and are respectively arranged in the four directions of east, south, west and north.

[0009] Preferably, the integrated control system is provided with a liquid crystal screen for displaying relevant parameters in the operation processing system and a main power switch for controlling each device in the operation processing system.

[0010] The method for using the above device comprises the following steps: S1, adding excess ammonium chloride solution from an ammonium chloride volumetric flask into a reaction vessel through a conveying mechanism, and adding lime stabilized soil to be tested into the reaction vessel through a soil inlet; S2, turn on the thermostat, use a stirrer to stir the mixed solution of lime stabilized soil to be tested and ammonium chloride solution inside the reaction vessel; S3, setting a conveying mechanism connected between the potassium oxalate volumetric flask and the reaction vessel, so that the potassium oxalate in the potassium oxalate volumetric flask titrates the mixed solution in the reaction vessel; S4. After each titration, the stirrer stirs the titrated solution, and the stirring time is not less than the reaction time coefficient. After the stirring time exceeds the reaction time coefficient, the second electrode in the reaction vessel measures the conductivity of the mixed solution and records and transmits it to the integrated control system. The solution stirring coefficient is used to determine whether the solution is stirred evenly. After the solution is stirred evenly, the conductivity reading measured by the second electrode is used to calculate the average conductivity reading of the solution; The reaction time coefficient is determined as follows:

[0011] in Indicates the maximum error allowed in the entire experiment; It is expressed as the stirrer speed, rpm; c is the amount of titrant per titration, ml; d is the concentration of the titrant, %; where 、 is the concentration stirring coefficient, which is affected by factors such as the type of titrant and temperature. is the agitator speed coefficient, which is determined by the size and shape of the container and the size and shape of the agitator blades. The titrant dosage coefficient is determined by the type and concentration of the titrant. is the error compensation coefficient, where 50≤a≤250, 1.0≤c≤5.0, 13≤d≤17, 0.01≤ ≤0.1, and the above reaction time coefficient is determined by numerical calculation only; The solution stirring coefficient is determined as follows: Where k is the solution stirring coefficient; 、 、 、 The conductivity readings measured by the four second electrodes in the reaction vessel; It is represented by the conductivity reading measured by the i-th second electrode; It is represented by the conductivity reading measured by the j-th second electrode; When the solution stirring coefficient k is lower than 0.2, the solution has been completely stirred and uniform. After the solution is completely stirred and uniform, the average value x of the conductivity readings measured by the four second electrodes is taken as the conductivity of the solution at this time:

[0012] Wherein, x is the average value of solution conductivity; It is represented by the conductivity reading measured by the i-th second electrode; S5. The integrated control system plots the relationship between the titrant dosage and the solution conductivity, and obtains the dosage of the titrant added when the conductivity reaches the lowest value; S6. Pour water into the reaction vessel from the water inlet, turn on the agitator, turn on the ultrasonic generator, and use the first electrode pH meter for detection; S7, while adding lime to the solution in the reactor from the soil inlet, observing the pH reading of the detection, when the pH reading is 7, open the drainage pipe valve connected to the drainage pipe to discharge the waste liquid; S8. Open the air pressure balance device. The ammonia generated during the reaction will enter the tail gas treatment device through the pipeline. When the pH in the tail gas treatment device is higher than the set value, the solution in the tail gas treatment device is passed into the ammonium chloride volumetric flask through the conveying mechanism.

[0013] Preferably, the tail gas treatment device is filled with a dilute hydrochloric acid solution.

[0014] Compared with the prior art, the present invention provides an intelligent and environmentally friendly on-site rapid detection device for lime dosage and its use method, which has the following beneficial effects: (1) The present invention discloses an intelligent and environmentally friendly on-site rapid detection device for lime dosage and a method for using the device. Based on the principle of ionic reaction, the device uses a titrant to react with calcium ions to generate a precipitate, and the reaction progress is characterized by conductivity. Compared with traditional EDTA titration devices and direct-reading calcium analyzers with low detection efficiency and long detection time, the present invention uses a specific formula to determine the solution stirring coefficient and reaction time coefficient. The solution stirring coefficient can accurately determine whether the solution is stirred evenly, and the reaction time coefficient determines the minimum stirring time after each titration. When the solution stirring time is greater than the reaction time coefficient, the solution stirring coefficient is used to shorten the stirring time as much as possible. The reaction time coefficient ensures the accuracy of the measurement, and the solution stirring coefficient ensures the efficiency of the measurement, thereby achieving both accuracy and efficiency.

[0015] (2) Compared with the traditional EDTA titration device and direct-reading calcium meter that pollute the environment and use multiple reagents, the device of the present invention is green, environmentally friendly and recyclable. The device of the present invention uses lime that is easily available on the construction site to treat wastewater, uses a pH meter to determine the liquid composition in the container, and discharges the waste liquid when the solution is neutral. In addition, the device of the present invention uses dilute hydrochloric acid solution to absorb ammonia generated by the chemical reaction, and uses a pH meter to measure the pH of the solution in the exhaust gas treatment device. When the pH of the solution is higher than a certain standard, the solution is converted from dilute hydrochloric acid solution to ammonium chloride solution, and the peristaltic pump sucks the liquid back into the reaction raw material tank.

[0016] (3) Compared with the traditional EDTA titration device and direct-reading calcium meter with uncontrollable measurement rate, the peristaltic pump used in the device of the present invention can adjust the titration speed, and the integrated control system can accelerate the stirring speed, further improving the measurement efficiency.

[0017] (4) Compared with the traditional EDTA titration device and direct-reading calcium meter that are affected by temperature, the device of the present invention controls the temperature in the reaction vessel through a thermostat, so that the device of the present invention can be used even in extremely bad weather (snowy days). At the same time, the device of the present invention eliminates the influence of the heat released in the chemical reaction on the measurement results, and the measurement results are more precise and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the device of the present invention; Figure 2 Schematic diagram of the internal system structure of the device of the present invention; Figure 3 This is a schematic cross-sectional view of the reaction vessel of the present invention; Figure 4 This is a schematic diagram of the bottom structure of the reaction vessel of the present invention when viewed from above; Figure 5 This is a perspective structural diagram of the agitator structure of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the exhaust gas treatment device; In the figure: 1. LCD screen; 2. Main power switch; 3. Potassium oxalate volumetric flask; 4. Ammonium chloride volumetric flask; 5. Exhaust gas treatment device; 6. Electronic scale; 7. Infusion pipeline; 8. Reaction container; 9. Pipeline; 10. Water inlet; 11. Soil inlet; 12. Agitator; 13. First electrode; 14. Ultrasonic generator; 15. Thermostat; 16. Drain pipe valve; 17. Drain pipe; 18. Second electrode; 19. pH meter; 20. Conveying mechanism; 21. Peristaltic pump; 22. Stainless steel hollow iron rod; 23. Stirring blade; 24. Driver; 25. Liquid filling port; 26. Exhaust port; 27. Calculator; 28. Air pressure balancer. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0021] Example 1: Reference Figure 1-6 , set up an intelligent environmentally friendly lime dosage on-site rapid detection device: Includes an integrated control system and operation processing system for controlling operations and displaying test results; An LCD screen 1 and a main power switch 2 are installed on the top surface of the integrated control system, and a calculator 27 is installed inside; The operation and processing system includes an internally arranged potassium oxalate volumetric flask 3, an ammonium chloride volumetric flask 4, an exhaust gas treatment device 5, and an externally arranged electronic scale 6. The potassium oxalate volumetric flask 3 and the ammonium chloride volumetric flask 4 are respectively connected to the reaction vessel 8 through a conveying mechanism 20, the reaction vessel 8 is connected to the interior of the exhaust gas treatment device 5 through a pipeline 9, and the exhaust gas treatment device 5 is connected to the ammonium chloride volumetric flask 4 through the conveying mechanism 20; a liquid addition port 25 and an exhaust port 26 are provided at the upper ends of the potassium oxalate volumetric flask 3 and the ammonium chloride volumetric flask 4.

[0022] A stirrer 12 is installed at the midpoint of the bottom surface of the reaction vessel 8, and a first electrode 13 is installed at the center of the top of the stirrer 12. A porous protective sleeve made of fluororubber material is installed on the outside of the first electrode 13. Four second electrodes 18 are spirally installed on the inner wall of the reaction vessel 8 from bottom to top. The four second electrodes 18 divide the height of the reaction vessel into five equal parts in the longitudinal direction and divide the radius of the reaction vessel 8 into five equal parts in the plane, and are respectively arranged in the four directions of east, south, west and north; an ultrasonic generator 14 and a thermostat 15 are installed below the reaction vessel, and the lower end of the reaction vessel is connected to a drainage pipe 17 through a valve. The reaction vessel 8 is connected to the ammonium chloride volumetric flask 4 and the potassium oxalate volumetric flask 3 through an infusion pipe 7, and a peristaltic pump 21 is installed on the infusion pipe 7. The reaction vessel 8 is connected to the exhaust gas treatment device 5 through a pipe 9, a pH meter 19 is installed inside the exhaust gas treatment device 5, and the exhaust gas treatment device 5 is connected to the ammonium chloride volumetric flask 4 through a peristaltic pump 21.

[0023] Copper wires are arranged inside the device, connecting the peristaltic pump 21, the stirrer 12, the electrode 13, the pH meter 18, the ultrasonic generator 14, the drainage pipe valve 16, the thermostat 15 and the integrated control system.

[0024] The stirrer 12 is composed of a stainless steel hollow iron rod 22 and eight stirring blades 23. The eight stirring blades 23 are connected to the middle section of the stainless steel hollow iron rod 22 by welding. The rotation and rotation rate of the end of the stainless steel hollow iron rod 22 are controlled by an integrated control system. The potassium oxalate volumetric flask 3 and the pipe 9 are both made of corrosion-resistant stainless steel. The peristaltic pump 21 is connected to the integrated control system via a copper wire, and the titration dosage and titration rate are controlled by the integrated control system. The first electrode 13, the second electrode 18 and the integrated control system play the role of a pH meter and a conductivity tester, and the thermostat 15 ensures that the temperature in the reaction vessel is at room temperature, 25°C; The tail gas treatment device 5 is a cylindrical barrel made of corrosion-resistant stainless steel, filled with a dilute hydrochloric acid solution. The bottom of the pipe connecting the reaction vessel 8 to the tail gas treatment device 5 is immersed in the dilute hydrochloric acid solution, and the pipe 9 connecting the ammonium chloride volumetric flask 4 to the tail gas treatment device 5 is also immersed in the dilute hydrochloric acid solution. A pH meter inside the tail gas treatment device 5 is mounted on the bottom of the cylindrical barrel and connected to the integrated control system via copper wire. Ammonia generated during the reaction reacts with the dilute hydrochloric acid in the vessel through the pipe to produce an ammonium chloride solution. When the pH of the solution exceeds the set value, a peristaltic pump 21 presses the solution from the tail gas treatment device 5 into the ammonium chloride volumetric flask 4. The pH meter 19 in the reaction vessel is used to determine whether the wastewater can be discharged.

[0025] Example 2: Using the device set up in the above embodiment 1, the following operation tests are performed: S1, weighing 50g of lime-stabilized soil to be tested (lime dosage at 3.00%), adding the lime-stabilized soil to be tested into the reaction vessel 8 through the soil inlet 11, and using the integrated control system 2 to control the peristaltic pump 21 to add 200ml of 10% ammonium chloride solution into the reaction vessel 8; S2. Use the integrated control system to control the thermostat 15, set the thermostat 15 reading to 25° C., use the integrated control system to turn on the stirrer 12, and adjust the stirrer 12 rotation speed to 120 rpm; S3. The integrated control system controls the peristaltic pump 21 connecting the potassium oxalate volumetric flask 3 and the reaction vessel 8, sets the titration dose to 1.8 ml, and sets the titration speed to 4 s and 5 s respectively through calculation. The titration endpoint ends after 100 titrations.

[0026] The reaction time coefficient is determined as follows:

[0027] in It represents the maximum error allowed in the entire experiment. It is expressed as the stirrer speed (rpm), c is the amount of titrant per titration (ml), and d is the concentration of the titrant (%), where 、 is the concentration stirring coefficient, which is affected by factors such as the type of titrant and temperature. is the agitator speed coefficient, which is determined by the size and shape of the container and the size and shape of the agitator blades. The titrant dosage coefficient is determined by the type and concentration of the titrant. is the error compensation coefficient, where 50≤a≤250, 1.0≤c≤5.0, 13≤d≤17, 0.01≤ ≤0.1.

[0028] Under the experimental conditions of this laboratory, 、 、 、 、 、 、 、 、 .

[0029]

[0030] Set a=120, c=1.8, d=14.5, Substitution ; S4. After each titration, the stirrer 12 is set to stir the titrated solution through the integrated control system 2. The conductivity of the solution is measured by the four second electrodes 18. It is experimentally measured that after a certain titration, when the stirring time exceeds 4 seconds, the solution stirring coefficient k appears for the first time. 0.2, the solution conductivity readings measured by the four second electrodes 18 are 100.1mS / cm, 100.2mS / cm, 100.1mS / cm, and 100.2mS / cm, respectively, and the integrated control system 2 calculates and records the conductivity; calculate:

[0031] =100.15mS / cm; S5, the integrated control system 2 draws a graph of the relationship between the titrant dosage and the conductivity, and obtains the dosage of the titrant added when the conductivity reaches the lowest value; S6, pouring water into the reaction vessel 8 from the water inlet 10, and turning on the agitator 12, ultrasonic generator 14, pH meter 19 and conductivity meter through the integrated control system; S7, while adding lime to the solution in the reactor from the soil inlet 11, observe the pH reading displayed by the integrated control system. When the pH reading is around 7, open the drainage pipe valve 16 through the integrated control system and continue to add water. When the conductivity reading is lower than the set value and the water is drained, close the drainage pipe valve 16; S8. The ammonia generated during the reaction will enter the tail gas treatment device 5 through the pipeline 9. When the pH in the tail gas treatment device 5 is higher than the set value, the peristaltic pump 21 presses the solution in the tail gas treatment device 5 into the ammonium chloride volumetric flask 4 to achieve complete operation.

[0032] S9. Perform five standard experiments with a stirring speed of 120 rpm, a titrant dosage of 1.8 ml, a titrant concentration of 14.5%, and a stirring time of 4 s. The measured lime dosages are 3.19%, 3.17%, 3.20%, 2.81%, and 2.82%, respectively, which are within 0.055 of the actual value of 3.00%.

[0033] Five sets of standard experiments were performed with a stirring speed of 120 rpm, a titrant dosage of 1.8 ml, a titrant concentration of 14.5%, and a stirring time of 5 s. The measured lime dosages were 3.09%, 3.08%, 2.99%, 2.91% and 3.10%, respectively, which were less than 0.055% of the actual value of 3.00%.

[0034] That is, after testing, under the condition that the specific stirring time is greater than the reaction time coefficient, the measured lime dosages are 3.09%, 3.08%, 2.99%, 2.91% and 3.10% respectively. The maximum error from the actual value of 3% is 3.3%, and the overall error is small. However, under the condition that the specific stirring time is less than the reaction time coefficient, the overall error is large.

[0035] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An intelligent and environmentally friendly on-site rapid detection device for lime dosage, comprising an integrated control system and an operation processing system for controlling operations and displaying detection results, characterized in that: A liquid crystal screen (1) and a main power switch (2) are installed on the top surface of the integrated control system, and a calculator (27) is installed inside. The operation processing system includes a potassium oxalate volumetric flask (3), an ammonium chloride volumetric flask (4), an exhaust gas treatment device (5) arranged inside, and a reaction container (8) and an electronic scale (6) arranged outside. The potassium oxalate volumetric flask (3) and the ammonium chloride volumetric flask (4) are respectively connected to the reaction container (8) through a conveying mechanism (20). The reaction container (8) is connected to the inside of the exhaust gas treatment device (5) through a pipeline (9). The exhaust gas treatment device (5) is connected to the ammonium chloride volumetric flask (4) through the conveying mechanism (20). The upper end of the reaction container (8) is provided with a water inlet (10) and a soil inlet (11), and valve switches are provided on the upper ends of the water inlet (10) and the soil inlet (11). A stirrer (12) is provided in the center of the reaction container (8), and a first electrode (13) for measuring the pH value of the solution is provided above the top of the stirrer (12). An ultrasonic generator (14) and a thermostat (15) are provided at the bottom of the reaction container (8), and the reaction container (8) is connected to a drainage pipe (17) through a drainage pipe valve (16). Four second electrodes (18) for measuring conductivity are spirally installed on the inner wall of the reaction container (8) from bottom to top. A pH meter (19) and a gas pressure balancer (28) are provided inside the exhaust gas treatment device (5). The upper ends of the exhaust gas treatment device (5), the potassium oxalate volumetric flask (3), and the ammonium chloride volumetric flask (4) are all provided with a liquid addition port (25) and an exhaust port (26), and valve switches are provided on the upper ends of the liquid addition port (25) and the exhaust port (26).

2. The intelligent environmentally friendly lime dosage on-site rapid detection device according to claim 1 is characterized in that: The delivery mechanism (20) comprises a liquid delivery pipeline (7) and a peristaltic pump (21) arranged on the liquid delivery pipeline (7).

3. The intelligent environmentally friendly lime dosage on-site rapid detection device according to claim 1 is characterized in that: The stirrer (12) includes a stainless steel hollow iron rod (22) and a plurality of stirring blades (23) installed around the stainless steel hollow iron rod (22). The lower end of the stirrer (12) is connected to a driver (24) for driving rotation provided at the bottom of the reaction container (8).

4. The intelligent environmentally friendly lime dosage on-site rapid detection device according to claim 3 is characterized by: The first electrode (13) is arranged at the center of the upper end of the stainless steel hollow iron rod (22), and a hollow protective cover is arranged outside the first electrode (13).

5. The intelligent environmentally friendly lime dosage on-site rapid detection device according to claim 4 is characterized in that: The four second electrodes (18) divide the height of the reaction container (8) into five equal parts in the longitudinal direction and divide the radius of the reaction container (8) into five equal parts in the plane, and are respectively arranged in the four directions of east, south, west and north.

6. The intelligent environmentally friendly lime dosage on-site rapid detection device according to claim 1 is characterized by: The integrated control system is provided with a liquid crystal screen (1) for displaying relevant parameters in the operation processing system and a main power switch (2) for controlling each device in the operation processing system.

7. A method for using the device according to any one of claims 1 to 6, characterized in that: The method of use comprises the following steps: S1, adding an excess amount of ammonium chloride solution from the ammonium chloride volumetric flask (4) into the reaction container (8) through the conveying mechanism (20), and adding lime stabilized soil to be tested into the reaction container (8) through the soil inlet (11); S2, turning on the thermostat (15), and using the stirrer (12) to stir the mixed solution of the lime-stabilized soil to be tested and the ammonium chloride solution in the reaction container (8); S3, setting a conveying mechanism (20) communicating between the potassium oxalate volumetric flask (3) and the reaction container (8), so that the potassium oxalate in the potassium oxalate volumetric flask (3) titrates the mixed solution in the reaction container (8); S4. After each titration, the stirrer (12) stirs the titrated solution, and the stirring time is not less than the reaction time coefficient. After the stirring time exceeds the reaction time coefficient, the second electrode (18) in the reaction container (8) measures the conductivity of the mixed solution and records the result and transmits it to the integrated control system. The stirring coefficient of the solution is used to determine whether the solution is stirred evenly. After the solution is stirred evenly, the conductivity reading measured by the second electrode (18) is used to calculate the average conductivity reading of the solution; The reaction time coefficient is determined as follows: ； in Indicates the maximum error allowed in the entire experiment; It is represented by the speed of the stirrer (12), rpm; c is the amount of the titrant per titration, ml; d is represented by the concentration of the titrant, %; where 、 is the concentration stirring coefficient, which is affected by different titrant types, temperature and other factors. is the agitator speed coefficient, which is determined by the size and shape of the container and the size and shape of the agitator blades. The titrant dosage coefficient is determined by the type and concentration of the titrant. is the error compensation coefficient, where 50≤a≤250, 1.0≤c≤5.0, 13≤d≤17, 0.01≤ ≤0.1, and the above reaction time coefficient is determined by numerical calculation only; The solution stirring coefficient is determined as follows: ; Where k is the solution stirring coefficient; 、 、 、 Conductivity readings measured by four second electrodes (18) in the reaction container (8); It represents the conductivity measured by the i-th second electrode (18); represents the conductivity measured by the j-th second electrode (18); When the solution stirring coefficient k is lower than 0.2, the solution has been completely stirred and uniform. After the solution is completely stirred and uniform, the average value x of the conductivity readings measured by the four second electrodes (18) is taken as the conductivity of the solution at this time: ； Wherein, x is the average value of solution conductivity; It represents the conductivity measured by the i-th second electrode (18); S5. The integrated control system plots the relationship between the titrant dosage and the solution conductivity, and obtains the dosage of the titrant added when the conductivity reaches the lowest value; S6. Pour water into the reaction container (8) from the water inlet (10), turn on the stirrer (12), turn on the ultrasonic generator (14), and use the first electrode (13) and pH meter (19) for detection; S7, adding lime to the solution in the reactor from the soil inlet (11) while observing the pH reading, and when the pH reading reaches 7, opening the drainage pipe valve (16) connected to the drainage pipe (17) to discharge the waste liquid; S8. The air pressure balancing device is turned on. The ammonia generated during the reaction process enters the tail gas treatment device (5) through the pipe (9). When the pH in the tail gas treatment device (5) is higher than the set value, the solution in the tail gas treatment device (5) is passed into the ammonium chloride volumetric flask (4) through the conveying mechanism (20).

8. The method of use according to claim 7, characterized in that: The tail gas treatment device (5) is filled with a dilute hydrochloric acid solution.

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