Ammonium nitrate solution preparation and regulation device

Abstract

The utility model belongs to the technical field of ammonium nitrate production, and particularly relates to an ammonium nitrate solution preparing and adjusting device. Comprising an ammonium nitrate solution preparation tank, the top of the ammonium nitrate solution preparation tank is respectively connected with an ammonium nitrate stock solution pipeline, a desalted water pipeline, a dilute nitric acid pipeline, a dilute ammonia water pipeline and a self-circulation pipeline, and inlets of the dilute nitric acid pipeline and the dilute ammonia water pipeline are respectively connected with a dilute nitric acid preparation tank and a dilute ammonia water preparation tank; a stirring device, a liquid level sensor, a pH monitoring device, a temperature sensor and a heating coil are respectively arranged in the ammonium nitrate solution preparation tank; the bottom of the ammonium nitrate solution preparation tank is connected with a liquid outlet pipeline, an outlet of the liquid outlet pipeline is connected with a discharging pump, and an outlet of the discharging pump is respectively connected with a self-circulation pipeline and a discharging pipeline. Through an automatic and high-precision control mode, flexible adjustment can be carried out according to different process requirements, the device is suitable for preparing ammonium nitrate solutions with different scales and requirements, and the production efficiency and the quality stability of the ammonium nitrate solutions are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to ammonium nitrate production technical field, concretely relates to ammonium nitrate solution preparation and adjusting device. BACKGROUND

[0002] In the chemical production process, ammonium nitrate solution as an important raw material, is widely used in fertilizer, explosive and other fields. With the continuous progress of production process, the quality and stability of ammonium nitrate solution are also more and more high, and preparation ammonium nitrate solution needs to control multiple factors accurately, including the concentration of solution, pH, temperature, etc., however, the existing ammonium nitrate solution preparation and adjusting device often has low degree of automation, adjusting precision is not high, the operation is complex, etc., it is difficult to meet the preparation demand under different process conditions.

[0003] Specifically, the traditional ammonium nitrate solution preparation and adjusting device often needs to manually adjust the adding amount of various raw materials in the preparation process, which not only has high labor intensity, but also is difficult to guarantee the accuracy and stability of preparation. At the same time, due to the lack of effective automatic control system, the operation and monitoring of the device are difficult, and operation errors and safety accidents are prone to occur. Therefore, developing a device capable of automatically and accurately preparing and adjusting ammonium nitrate solution has important significance for improving production efficiency, reducing production cost and ensuring production safety. UTILITY MODEL CONTENTS

[0004] According to the above deficiencies in the prior art, the purpose of the utility model is to provide an ammonium nitrate solution preparation and adjusting device, which can be flexibly adjusted according to different process requirements through automatic and high-precision control mode, and is suitable for preparation of ammonium nitrate solution of different scales and requirements, thereby improving the production efficiency and quality stability of ammonium nitrate solution and significantly enhancing the safety and reliability of the production process.

[0005] The utility model is implemented by adopting the following technical solutions:

[0006] The ammonium nitrate solution preparation and adjusting device comprises an ammonium nitrate solution preparation tank, the top of the ammonium nitrate solution preparation tank is respectively connected with an ammonium nitrate stock solution pipeline, a desalted water pipeline, a dilute nitric acid pipeline, a dilute ammonia water pipeline and a self-circulation pipeline, an ammonium nitrate stock solution mass flowmeter and an ammonium nitrate stock solution regulating valve are arranged on the ammonium nitrate stock solution pipeline; a desalted water regulating valve and a desalted water mass flowmeter are arranged on the desalted water pipeline; a dilute nitric acid regulating valve and a dilute nitric acid flow monitoring device are arranged on the dilute nitric acid pipeline; a dilute ammonia water regulating valve and a dilute ammonia water flow monitoring device are arranged on the dilute ammonia water pipeline; a self-circulation control valve is arranged on the self-circulation pipeline; a dilute nitric acid preparation tank and a dilute ammonia water preparation tank are respectively connected with the inlet of the dilute nitric acid pipeline and the dilute ammonia water pipeline;

[0007] The inner part of the ammonium nitrate solution preparation tank is respectively provided with stirring device, liquid level sensor, pH monitoring device, temperature sensor and heating coil, the outlet of the heating coil is connected with desalinated water pipeline through pipeline; the number of the pH monitoring device and the temperature sensor is more than one group;

[0008] The bottom of the ammonium nitrate solution preparation tank is connected with liquid outlet pipeline, the liquid outlet pipeline is provided with liquid outlet control valve, the outlet of the liquid outlet pipeline is connected with discharge pump, the outlet of the discharge pump is respectively connected with self-circulation pipeline and discharge pipeline, the discharge pipeline is provided with discharge control valve.

[0009] The inlet of the heating coil is connected with steam, the inlet of the heating coil is provided with steam regulating valve.

[0010] The desalinated water pipeline is also respectively connected with dilute nitric acid preparation tank and dilute ammonia water preparation tank through pipeline, the pipeline from the desalinated water pipeline to the dilute nitric acid preparation tank is respectively provided with dilute nitric acid tank regulating valve and dilute nitric acid tank mass flow meter, the pipeline from the desalinated water pipeline to the dilute ammonia water preparation tank is respectively provided with dilute ammonia water tank regulating valve and dilute ammonia water tank mass flow meter.

[0011] The dilute nitric acid preparation tank and the dilute ammonia water preparation tank are also respectively connected with nitric acid pipeline and ammonia water pipeline, the nitric acid pipeline is provided with nitric acid regulating valve and dilute nitric acid mass flow meter; the ammonia water pipeline is provided with ammonia water regulating valve and dilute ammonia water mass flow meter.

[0012] The dilute nitric acid preparation tank and the dilute ammonia water preparation tank are respectively provided with dilute nitric acid liquid level sensor and dilute ammonia water liquid level sensor.

[0013] The ammonium nitrate solution preparation and adjustment device also comprises control system, the control system is electrically connected with ammonium nitrate stock solution mass flow meter, ammonium nitrate stock solution regulating valve, desalinated water regulating valve, dilute nitric acid regulating valve, dilute nitric acid flow monitoring device, dilute ammonia water regulating valve, dilute ammonia water flow monitoring device, self-circulation control valve, liquid level sensor, pH monitoring device, temperature sensor, liquid outlet control valve, discharge pump, discharge control valve, dilute nitric acid tank regulating valve, dilute ammonia water tank regulating valve, nitric acid regulating valve, ammonia water regulating valve, dilute nitric acid liquid level sensor, dilute nitric acid mass flow meter, dilute ammonia water liquid level sensor, dilute ammonia water mass flow meter, steam regulating valve, desalinated water mass flow meter, dilute nitric acid tank mass flow meter and dilute ammonia water tank mass flow meter.

[0014] The working principle of the device is as follows:

[0015] The mass fraction of 96%, pH value of 6.5-7.5 ammonium nitrate stock solution enters the ammonium nitrate solution preparation tank through the ammonium nitrate stock solution pipeline, and the desalted water enters the ammonium nitrate solution preparation tank from the desalted water pipeline, and the dilute ammonium nitrate solution is mixed and prepared under the action of the stirring device, and the concentration thereof is adjusted through the desalted water; the addition amount of the ammonium nitrate stock solution and the desalted water is monitored through the ammonium nitrate stock solution mass flow meter and the desalted water mass flow meter, the liquid level of the ammonium nitrate solution preparation tank is monitored through the liquid level sensor, and the ammonium nitrate stock solution adjusting valve and the desalted water adjusting valve are interlocked controlled to keep the liquid level of the ammonium nitrate solution preparation tank at about 80%; the pH value in the ammonium nitrate solution preparation tank is monitored through the pH monitoring device, and the dilute nitric acid adjusting valve or the dilute ammonia water adjusting valve is interlocked controlled; the addition amount of the nitric acid solution or the dilute ammonia water is monitored through the dilute nitric acid flow monitoring device or the dilute ammonia water flow monitoring device, and then the pH value of the dilute ammonium nitrate solution in the ammonium nitrate solution preparation tank is adjusted; the temperature in the ammonium nitrate solution preparation tank is monitored through the temperature sensor, and the steam adjusting valve is interlocked controlled to realize the accurate control of the temperature of the dilute ammonium nitrate solution in the ammonium nitrate solution preparation tank by adjusting the steam amount entering the heating coil, so that the crystallization is prevented. The ammonium nitrate solution preparation tank is provided with multiple groups of pH monitoring devices and temperature sensors, so that the pH and temperature of the dilute nitric acid solution at different positions in the ammonium nitrate solution preparation tank can be monitored in real time, and the self-circulation control valve, the discharge pump and the discharge control valve are started at the same time as the stirring device is started during the initial feeding stage or the feeding process of the nitric acid solution or the dilute ammonia water, so that the rapid mixing of different materials in the ammonium nitrate solution preparation tank is realized, and when the values of the pH monitoring devices at all positions are close to each other and stable, that is, the mixing is uniform, the self-circulation control valve is interlocked closed, and the discharge control valve is opened to discharge.

[0016] In the device, the control system is further used to control the dilute nitric acid tank adjusting valve and the nitric acid adjusting valve, to adjust the addition amount of the nitric acid and the desalted water in the dilute nitric acid preparation tank, and the addition amount of the nitric acid and the desalted water is monitored through the dilute nitric acid mass flow meter and the dilute nitric acid tank mass flow meter, so that the mass fraction of 10% nitric acid solution is prepared; the liquid level in the dilute nitric acid preparation tank is monitored through the dilute nitric acid liquid level sensor.

[0017] Similarly, the control system is used to control the dilute ammonia water tank adjusting valve and the ammonia water adjusting valve, to adjust the addition amount of the ammonia water and the desalted water in the dilute ammonia water preparation tank, and the addition amount of the ammonia water and the desalted water is monitored through the dilute nitric acid mass flow meter and the dilute ammonia water tank mass flow meter, so that the mass fraction of 10% dilute ammonia water is prepared; the liquid level in the dilute ammonia water preparation tank is monitored through the dilute ammonia water liquid level sensor.

[0018] Compared with the prior art, the device has the following beneficial effects:

[0019] The ammonium nitrate solution preparation and adjustment device of this invention achieves precise control over key aspects such as raw material addition, pH adjustment, temperature control, and liquid level monitoring, ensuring the efficiency and accuracy of the preparation process. By utilizing a mass flow meter and regulating valve to precisely control the amount of raw materials added, combined with a real-time monitoring device, the mass fraction and pH value of the prepared ammonium nitrate solution are guaranteed to be stable and reliable. Furthermore, the device also offers advantages such as high safety, energy saving and environmental protection, simple operation, and easy maintenance, providing an efficient and reliable solution for the preparation and adjustment of ammonium nitrate solutions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the ammonium nitrate solution preparation and adjustment device of the present invention;

[0021] In the diagram: 1. Ammonium nitrate solution preparation tank; 2. Ammonium nitrate stock solution mass flow meter; 3. Ammonium nitrate stock solution regulating valve; 4. Demineralized water regulating valve; 5. Dilute nitric acid regulating valve; 6. Dilute nitric acid flow monitoring device; 7. Dilute ammonia water regulating valve; 8. Dilute ammonia water flow monitoring device; 9. Self-circulation control valve; 10. Dilute nitric acid preparation tank; 11. Dilute ammonia water preparation tank; 12. Stirring device; 13. Liquid level sensor; 14. pH monitoring device; 15. Temperature sensor; 16. Heating coil; 7. Discharge control valve; 18. Discharge pump; 19. Discharge control valve; 20. Regulating valve for dilute nitric acid tank; 21. Regulating valve for dilute ammonia tank; 22. Nitric acid regulating valve; 23. Ammonia regulating valve; 24. Dilute nitric acid level sensor; 25. Dilute nitric acid mass flow meter; 26. Dilute ammonia level sensor; 27. Dilute ammonia mass flow meter; 28. Steam regulating valve; 29. ​​Demineralized water mass flow meter; 30. Mass flow meter for dilute nitric acid tank; 31. Mass flow meter for dilute ammonia tank. Detailed Implementation

[0022] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Example 1

[0024] like Figure 1As shown, the ammonium nitrate solution preparation and adjustment device comprises an ammonium nitrate solution preparation tank 1, the top of the ammonium nitrate solution preparation tank 1 is respectively connected with an ammonium nitrate stock solution pipeline, a desalted water pipeline, a dilute nitric acid pipeline, a dilute ammonia water pipeline and a self-circulation pipeline, the ammonium nitrate stock solution pipeline is provided with an ammonium nitrate stock solution mass flow meter 2 and an ammonium nitrate stock solution adjusting valve 3; the desalted water pipeline is provided with a desalted water adjusting valve 4 and a desalted water mass flow meter 29; the dilute nitric acid pipeline is provided with a dilute nitric acid adjusting valve 5 and a dilute nitric acid flow monitoring device 6; the dilute ammonia water pipeline is provided with a dilute ammonia water adjusting valve 7 and a dilute ammonia water flow monitoring device 8; the self-circulation pipeline is provided with a self-circulation control valve 9; the inlet of the dilute nitric acid pipeline and the dilute ammonia water pipeline is respectively connected with a dilute nitric acid preparation tank 10 and a dilute ammonia water preparation tank 11;

[0025] The inside of the ammonium nitrate solution preparation tank 1 is respectively provided with a stirring device 12, a liquid level sensor 13, a pH monitoring device 14, a temperature sensor 15 and a heating coil 16, the outlet of the heating coil 16 is connected with the desalted water pipeline through a pipeline; the number of the pH monitoring device 14 and the temperature sensor 15 is two groups;

[0026] The bottom of the ammonium nitrate solution preparation tank 1 is connected with a liquid outlet pipeline, the liquid outlet pipeline is provided with a liquid outlet control valve 17, the outlet of the liquid outlet pipeline is connected with a discharge pump 18, the outlet of the discharge pump 18 is respectively connected with the self-circulation pipeline and a discharge pipeline, the discharge pipeline is provided with a discharge control valve 19.

[0027] The inlet of the heating coil 16 is connected with steam, the inlet of the heating coil 16 is provided with a steam adjusting valve 28.

[0028] The desalted water pipeline is also respectively connected with the dilute nitric acid preparation tank 10 and the dilute ammonia water preparation tank 11 through pipelines, the pipeline from the desalted water pipeline to the dilute nitric acid preparation tank 10 is respectively provided with an inlet dilute nitric acid tank adjusting valve 20 and an inlet dilute nitric acid tank mass flow meter 30, the pipeline from the desalted water pipeline to the dilute ammonia water preparation tank 11 is respectively provided with an inlet dilute ammonia water tank adjusting valve 21 and an inlet dilute ammonia water tank mass flow meter 31.

[0029] The dilute nitric acid preparation tank 10 and the dilute ammonia water preparation tank 11 are also respectively connected with a nitric acid pipeline and an ammonia water pipeline, the nitric acid pipeline is provided with a nitric acid adjusting valve 22 and a dilute nitric acid mass flow meter 25; the ammonia water pipeline is provided with an ammonia water adjusting valve 23 and a dilute ammonia water mass flow meter 27.

[0030] The dilute nitric acid preparation tank 10 and the dilute ammonia water preparation tank 11 are respectively provided with a dilute nitric acid liquid level sensor 24 and a dilute ammonia water liquid level sensor 26.

[0031] The ammonium nitrate solution preparation and adjustment device further comprises a control system electrically connected with the ammonium nitrate stock solution mass flowmeter 2, the ammonium nitrate stock solution adjusting valve 3, the desalted water adjusting valve 4, the dilute nitric acid adjusting valve 5, the dilute nitric acid flow monitoring device 6, the dilute ammonia water adjusting valve 7, the dilute ammonia water flow monitoring device 8, the self-circulation control valve 9, the liquid level sensor 13, the pH monitoring device 14, the temperature sensor 15, the liquid outlet control valve 17, the discharge pump 18, the discharge control valve 19, the dilute nitric acid tank inlet adjusting valve 20, the dilute ammonia water tank inlet adjusting valve 21, the nitric acid adjusting valve 22, the ammonia water adjusting valve 23, the dilute nitric acid liquid level sensor 24, the dilute nitric acid mass flowmeter 25, the dilute ammonia water liquid level sensor 26, the dilute ammonia water mass flowmeter 27, the steam adjusting valve 28, the desalted water mass flowmeter 29, the dilute nitric acid tank inlet mass flowmeter 30 and the dilute ammonia water tank inlet mass flowmeter 31.

[0032] When working, the specific steps are as follows:

[0033] 1) Raw material addition and mixing: the ammonium nitrate stock solution with a mass fraction of 96% and a pH value of 7.0 and the desalted water are respectively introduced into the ammonium nitrate solution preparation tank 1 through respective pipelines, and mixed under the action of the stirring device 12. At the same time, the addition amount of the raw materials is accurately controlled through the ammonium nitrate stock solution adjusting valve 3 and the desalted water adjusting valve 4, and the liquid level is monitored and controlled to be kept at 80% through the liquid level sensor 13.

[0034] 2) pH value adjustment: the pH value in the ammonium nitrate solution preparation tank 1 is monitored in real time through the pH monitoring device 14, and according to the monitoring result, the control system automatically adjusts the addition amount of the dilute nitric acid or the dilute ammonia water, and the accuracy of the adjustment is ensured through the dilute nitric acid flow monitoring device 6 or the dilute ammonia water flow monitoring device 8, so as to realize the accurate control of the solution pH value.

[0035] 3) Temperature control: the temperature in the ammonium nitrate solution preparation tank 1 is monitored in real time through the temperature sensor 15, when the temperature is lower than 20℃, the control system automatically opens the steam adjusting valve 28 to increase the steam amount entering the heating coil 16 to increase the solution temperature, and vice versa, when the temperature exceeds 50℃, the steam amount is reduced.

[0036] 4) Rapid mixing and discharge: when the initial feeding or the pH value adjustment is performed, the liquid outlet control valve 17, the discharge pump 18 and the self-circulation control valve 9 are simultaneously started, and the self-circulation is used to promote the rapid mixing of different materials in the ammonium nitrate solution preparation tank 1. When the pH monitoring device 14 shows that the values of each part are close and stable, it is considered that the solution is uniformly mixed, at this time, the self-circulation control valve 9 is closed, and the discharge control valve 19 is opened for discharge.

[0037] 5) Preparation of nitric acid solution and dilute ammonia water: the control system adjusts the amount of nitric acid, ammonia water and desalinated water added into the dilute nitric acid preparation tank 10 and the dilute ammonia water preparation tank 11 by controlling the dilute nitric acid tank adjusting valve 20 and the nitric acid adjusting valve 22, and the dilute ammonia water tank adjusting valve 21 and the ammonia water adjusting valve 23, respectively, while monitoring the amount of desalinated water and nitric acid or ammonia water added, to ensure that the mass fraction of the prepared nitric acid solution and dilute ammonia water is 10%.

Claims

1. An ammonium nitrate solution preparation and conditioning apparatus, characterized by, The application relates to a preparation tank for an ammonium nitrate solution, which comprises an ammonium nitrate solution preparation tank (1), an ammonium nitrate solution preparation tank (1) top is respectively connected with an ammonium nitrate solution pipeline, a desalted water pipeline, a dilute nitric acid pipeline, a dilute ammonia water pipeline and a self-circulation pipeline, the ammonium nitrate solution pipeline is provided with an ammonium nitrate solution mass flowmeter (2) and an ammonium nitrate solution adjusting valve (3); the desalted water pipeline is provided with a desalted water adjusting valve (4) and a desalted water mass flowmeter (29); the dilute nitric acid pipeline is provided with a dilute nitric acid adjusting valve (5) and a dilute nitric acid flow monitoring device (6); the dilute ammonia water pipeline is provided with a dilute ammonia water adjusting valve (7) and a dilute ammonia water flow monitoring device (8); the self-circulation pipeline is provided with a self-circulation control valve (9); the inlet of the dilute nitric acid pipeline and the dilute ammonia water pipeline is respectively connected with a dilute nitric acid preparation tank (10) and a dilute ammonia water preparation tank (11); The ammonium nitrate solution preparation tank (1) is internally provided with a stirring device (12), a liquid level sensor (13), a pH monitoring device (14), a temperature sensor (15) and a heating coil (16), and the outlet of the heating coil (16) is connected with the desalted water pipeline through a pipeline; The bottom of the ammonium nitrate solution preparation tank (1) is connected with a liquid outlet pipeline, the liquid outlet pipeline is provided with a liquid outlet control valve (17), the outlet of the liquid outlet pipeline is connected with a discharge pump (18), the outlet of the discharge pump (18) is respectively connected with the self-circulation pipeline and a discharge pipeline, and the discharge pipeline is provided with a discharge control valve (19).

2. The ammonium nitrate solution formulation and conditioning apparatus of claim 1, wherein, The inlet of the heating coil (16) is connected with steam, and the inlet of the heating coil (16) is provided with a steam adjusting valve (28).

3. The ammonium nitrate solution formulation and conditioning apparatus of claim 2, wherein, The desalted water pipeline is also respectively connected with the dilute nitric acid preparation tank (10) and the dilute ammonia water preparation tank (11) through pipelines, the pipeline from the desalted water pipeline to the dilute nitric acid preparation tank (10) is respectively provided with an inlet dilute nitric acid tank adjusting valve (20) and an inlet dilute nitric acid tank mass flowmeter (30), and the pipeline from the desalted water pipeline to the dilute ammonia water preparation tank (11) is respectively provided with an inlet dilute ammonia water tank adjusting valve (21) and an inlet dilute ammonia water tank mass flowmeter (31).

4. The ammonium nitrate solution formulation and conditioning apparatus of claim 3, wherein, The dilute nitric acid preparation tank (10) and the dilute ammonia water preparation tank (11) are also respectively connected with a nitric acid pipeline and an ammonia water pipeline, the nitric acid pipeline is provided with a nitric acid adjusting valve (22) and a dilute nitric acid mass flowmeter (25), and the ammonia water pipeline is provided with an ammonia water adjusting valve (23) and a dilute ammonia water mass flowmeter (27).

5. The ammonium nitrate solution formulation and conditioning apparatus of claim 4, wherein, The dilute nitric acid preparation tank (10) and the dilute ammonia water preparation tank (11) are respectively provided with a dilute nitric acid liquid level sensor (24) and a dilute ammonia water liquid level sensor (26).

6. The ammonium nitrate solution formulation and conditioning apparatus of claim 5, wherein, The control system is electrically connected with the ammonium nitrate stock solution mass flow meter (2), the ammonium nitrate stock solution regulating valve (3), the desalted water regulating valve (4), the dilute nitric acid regulating valve (5), the dilute nitric acid flow monitoring device (6), the dilute ammonia water regulating valve (7), the dilute ammonia water flow monitoring device (8), the self-circulation control valve (9), the liquid level sensor (13), the pH monitoring device (14), the temperature sensor (15), the liquid outlet control valve (17), the liquid outlet pump (18), the liquid outlet control valve (19), the dilute nitric acid tank inlet regulating valve (20), the dilute ammonia water tank inlet regulating valve (21), the nitric acid regulating valve (22), the ammonia water regulating valve (23), the dilute nitric acid liquid level sensor (24), the dilute nitric acid mass flow meter (25), the dilute ammonia water liquid level sensor (26), the dilute ammonia water mass flow meter (27), the steam regulating valve (28), the desalted water mass flow meter (29), the dilute nitric acid tank inlet mass flow meter (30) and the dilute ammonia water tank inlet mass flow meter (31).

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