Intrinsically safe ammonium nitrate solution production system

Abstract

The utility model belongs to the technical field of ammonium nitrate solution production, and particularly relates to an intrinsically safe ammonium nitrate solution production system which comprises a neutralization system, an ammonium nitrate solution evaporation system, an ammonium nitrate solution pH adjusting system, an ammonium nitrate solution concentration adjusting and loading system and a process steam washing system, the ammonium nitrate solution pH adjusting system comprises an ammonium nitrate solution tank, the ammonium nitrate solution tank is further connected with a pH online detection assembly, the pH online detection assembly comprises an ammonium nitrate solution dilution tank and a first pH meter 16, and an inlet of the ammonium nitrate solution dilution tank is connected with the ammonium nitrate solution tank through a pipeline. An outlet of the ammonium nitrate solution diluting tank is connected with a first pH meter through a pipeline; according to the utility model, the pH on-line detection assembly is arranged, the pH on-line detection is carried out on an ammonium nitrate solution in the ammonium nitrate solution tank through the pH on-line detection assembly, and then the ammonia adding amount of the ammonium nitrate solution tank is adjusted through the second ammonia gas flow adjusting valve.

Description

Technical Field

[0001] The utility model belongs to the technical field of ammonium nitrate solution production, and specifically relates to an intrinsically safe ammonium nitrate solution production system. Background Art

[0002] As the ammonium nitrate market continues to change, more and more customers tend to choose ammonium nitrate solution products that are easy to use and have low overall costs. For ammonium nitrate production companies, ammonium nitrate solution products can save energy consumption in the drying and belt conveying processes, as well as product packaging costs and labor costs; for ammonium nitrate explosive production companies, they can save labor costs for product crushing and energy consumption in the dissolution process.

[0003] Many explosives manufacturers have strict requirements on the concentration and pH index range of ammonium nitrate solution, with concentration index requirements of 92-93% and pH index requirements of 4.5-6. When using the tubular reactor method to produce ammonium nitrate solution, the concentration of ammonium nitrate solution can be easily achieved by controlling the pressure and temperature of the evaporation system, but it is difficult to directly adjust the pH of the ammonium nitrate solution to meet the requirements. Usually, an ammonium nitrate solution manufacturer sets up an ammonium nitrate solution preparation tank, first feeds the ammonium nitrate solution into the preparation tank, adjusts its pH to meet the requirements by adding dilute nitric acid, ammonia water or gaseous ammonia, and then loads it for export.

[0004] In order to improve the production efficiency of ammonium nitrate solution, reduce the safety risks caused by the storage of ammonium nitrate solution, and reduce production costs, it is necessary to improve the existing ammonium nitrate production system. Utility Model Content

[0005] The utility model provides an intrinsically safe ammonium nitrate solution production system in view of the above problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An intrinsically safe ammonium nitrate solution production system, comprising a neutralization system, an ammonium nitrate solution evaporation system, an ammonium nitrate solution pH adjustment system, an ammonium nitrate solution concentration adjustment and loading system, and a process steam washing system;

[0008] The neutralization system comprises a gas ammonia delivery pipeline, a dilute nitric acid delivery pipeline, a tubular reactor and a reactor flash tank, wherein the gas ammonia delivery pipeline is connected to the tubular reactor for delivering gas ammonia into the tubular reactor, the dilute nitric acid delivery pipeline is connected to the tubular reactor for delivering dilute nitric acid into the tubular reactor, the reactor flash tank is connected to the tubular reactor for flash separation of the gas-liquid mixture delivered from the tubular reactor, the steam outlet of the reactor flash tank is connected to the bottom of the neutralization washing tower through a pipeline, and the solution outlet at the bottom of the reactor flash tank is connected to the inlet of the primary evaporator receiving tank through a pipeline;

[0009] The ammonium nitrate solution evaporation system comprises a primary evaporator receiving tank, a primary evaporator, a primary evaporator separator, an evaporative condenser and a steam ejector, wherein the top of the primary evaporator receiving tank is connected to the inlet of the evaporative condenser through a pipeline, the first input end of the steam ejector is connected to a 0.8Mpa steam pipeline, the second input end of the steam ejector is connected to the evaporative condenser for extracting the non-condensable gas in the evaporative condenser, the bottom of the primary evaporator receiving tank is connected to the top of the primary evaporator through a pipeline, the steam outlet of the primary evaporator is communicated with the primary evaporator separator, the steam outlet of the primary evaporator separator is connected to the inlet of the evaporative condenser, and the bottoms of the primary evaporator and the primary evaporator separator both enter the bottom of the ammonium nitrate solution tank through a connecting pipeline;

[0010] The ammonium nitrate solution pH regulating system comprises an ammonium nitrate solution tank, on which an agitator is arranged, and in which an ammonia adding regulating pipeline and a water adding cooling pipeline are arranged, the ammonia adding regulating pipeline extends to the bottom of the ammonium nitrate solution tank, and the water adding cooling pipeline extends to the top of the ammonium nitrate solution tank, and the ammonium nitrate solution tank is also connected with a pH online detection component, the pH online detection component comprises an ammonium nitrate solution dilution tank and a No. 1 pH meter 16, the inlet of the ammonium nitrate solution dilution tank is connected to the ammonium nitrate solution tank through a pipeline, and the ammonium nitrate solution dilution tank is also provided with a water adding dilution pipeline for fully diluting and cooling the high-temperature ammonium nitrate solution entering the ammonium nitrate solution dilution tank, the outlet of the ammonium nitrate solution dilution tank is connected to the No. 1 pH meter through a pipeline, so as to facilitate the online pH measurement of the ammonium nitrate solution, and an ammonium nitrate solution pump is arranged at the outlet of the ammonium nitrate solution tank, and the pipeline of the ammonium nitrate solution pump outlet is connected to a granulation tower and a pipeline mixer;

[0011] The ammonium nitrate solution concentration adjustment and loading system comprises a pipeline mixer and a pump pipe, the pipeline mixer is connected to a water adding adjustment pipeline, a desalted water flow meter and a desalted water regulating valve are arranged on the water adding adjustment pipeline, and the outlet of the pipeline mixer is connected to the pump pipe through a pipeline;

[0012] The process steam washing system comprises an evaporative condensate tank, an evaporative condensate pump, a neutralization washing tower, a No. 2 liquid level regulating valve, a neutralization washing pump, a No. 2 pH meter and a pH regulating valve. The inlet of the evaporative condensate tank is connected to the outlet of the evaporative condenser, the outlet of the evaporative condensate tank is connected to the inlet of the evaporative condensate pump, the outlet of the evaporative condensate pump is connected to the neutralization washing tower through a pipeline with a No. 2 liquid level regulating valve, the liquid level of the neutralization washing tower is controlled by the No. 2 liquid level regulating valve, the outlet of the lower part of the neutralization washing tower is connected to the neutralization washing pump, the outlet of the neutralization washing pump is connected to the middle part of the neutralization washing tower through a pipeline with a No. 2 pH meter, and a nitric acid inlet pipeline with a pH regulating valve is also connected to the pipeline at the outlet of the neutralization washing pump.

[0013] Furthermore, a No. 1 ammonia gas flowmeter and a No. 1 ammonia gas flow regulating valve are provided on the ammonia gas delivery pipeline, a dilute nitric acid flowmeter and a dilute nitric acid regulating valve are provided on the dilute nitric acid delivery pipeline, and a No. 1 liquid level regulating valve is provided on the pipeline between the reactor flash tank and the primary evaporator receiving tank.

[0014] Furthermore, an evaporation pressure regulating valve is connected to the pipeline between the steam ejector and the evaporation condenser, the input end of the evaporation pressure regulating valve is connected to the atmosphere, and the output end of the evaporation pressure regulating valve is connected to the evaporation condenser.

[0015] Furthermore, a No. 2 gas ammonia flowmeter and a No. 2 gas ammonia flow regulating valve are provided on the ammonia adding regulating pipeline, and a water adding and cooling valve is provided on the water adding and cooling pipeline.

[0016] Furthermore, an ammonium nitrate solution flow meter and an emergency shut-off valve are arranged on the pipeline between the outlet of the pipeline mixer and the crane pipe.

[0017] Furthermore, the pipeline at the outlet of the neutralization and washing pump is also connected to the reactor flash tank.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The utility model is provided with a pH online detection component, through which the pH online detection is performed on the ammonium nitrate solution in the ammonium nitrate solution tank, and then the amount of ammonia added into the ammonium nitrate solution tank is adjusted by the No. 2 gas ammonia flow regulating valve, so as to achieve online adjustment of the pH of the ammonium nitrate solution in the ammonium nitrate solution tank, thereby improving the production efficiency of the ammonium nitrate solution and avoiding the safety risks caused by separately setting up an ammonium nitrate solution preparation tank to store the ammonium nitrate solution;

[0020] The utility model can adjust the evaporation pressure of the ammonium nitrate solution evaporation system through an evaporation condenser, a steam ejector and an evaporation pressure regulating valve, and adjust the evaporation temperature of the ammonium nitrate solution evaporation system by adjusting the amount of steam entering the primary evaporator; when only the ammonium nitrate solution is produced, the concentration of the ammonium nitrate solution can be directly controlled to be 92-93% by adjusting the evaporation temperature and the evaporation pressure of the ammonium nitrate solution; when the granular ammonium nitrate and the ammonium nitrate solution are co-produced, the concentration of the ammonium nitrate solution can be controlled to be 96-97% by adjusting the evaporation temperature and the evaporation pressure of the ammonium nitrate solution, and then the concentration of the ammonium nitrate solution can be adjusted to 92-93% through a pipeline mixer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] In the figure, ammonia gas delivery pipeline 1, dilute nitric acid delivery pipeline 2, tubular reactor 3, reactor flash tank 4, neutralization washing tower 5, primary evaporator receiving tank 6, primary evaporator 7, primary evaporator separator 8, evaporation condenser 9, steam ejector 10, ammonium nitrate solution tank 11, stirrer 12, ammonia adding regulation pipeline 13, water adding cooling pipeline 14, ammonium nitrate solution dilution tank 15, No. 1 pH meter 16, water adding dilution pipeline 17, ammonium nitrate solution pump 18, granulation tower 19, pipeline mixer 20, crane pipe 21, water adding regulation pipeline 22, Desalted water flowmeter 23, desalted water regulating valve 24, evaporation condensate tank 25, evaporation condensate pump 26, No. 2 liquid level regulating valve 27, neutralization washing pump 28, No. 2 pH meter 29, pH regulating valve 30, No. 1 gas ammonia flowmeter 31, No. 1 gas ammonia flow regulating valve 32, dilute nitric acid flowmeter 33, dilute nitric acid regulating valve 34, No. 1 liquid level regulating valve 35, evaporation pressure regulating valve 36, No. 2 gas ammonia flowmeter 37, No. 2 gas ammonia flow regulating valve 38, water adding and cooling valve 39, ammonium nitrate solution flowmeter 40, emergency shut-off valve 41. DETAILED DESCRIPTION

[0023] In order to further illustrate the technical solution of the present invention, the present invention is further described below through embodiments.

[0024] like Figure 1 As shown, an intrinsically safe ammonium nitrate solution production system includes a neutralization system, an ammonium nitrate solution evaporation system, an ammonium nitrate solution pH adjustment system, an ammonium nitrate solution concentration adjustment and loading system and a process steam washing system;

[0025] The neutralization system comprises a gas ammonia delivery pipeline 1, a dilute nitric acid delivery pipeline 2, a tubular reactor 3 and a reactor flash tank 4, wherein the gas ammonia delivery pipeline 1 is connected to the tubular reactor 3 for delivering gas ammonia into the tubular reactor 3, the dilute nitric acid delivery pipeline 2 is connected to the tubular reactor 3 for delivering dilute nitric acid into the tubular reactor 3, a gas ammonia flow meter 31 and a gas ammonia flow regulating valve 32 are arranged on the gas ammonia delivery pipeline 1, a dilute nitric acid flow meter 33 and a dilute nitric acid regulating valve 34 are arranged on the dilute nitric acid delivery pipeline 2, the reactor flash tank 4 is connected to the tubular reactor 3 for flash separation of the gas-liquid mixture delivered from the tubular reactor 3, the steam outlet of the reactor flash tank 4 is connected to the bottom of the neutralization washing tower 5 through a pipeline, the solution outlet at the bottom of the reactor flash tank 4 is connected to the inlet of the primary evaporator receiving tank 6 through a pipeline, and a liquid level regulating valve 35 is arranged on the pipeline between the reactor flash tank 4 and the primary evaporator receiving tank 6;

[0026] The ammonium nitrate solution evaporation system comprises a primary evaporator receiving tank 6, a primary evaporator 7, a primary evaporator separator 8, an evaporative condenser 9 and a steam ejector 10. The top of the primary evaporator receiving tank 6 is connected to the inlet of the evaporative condenser 9 through a pipeline. The first input end of the steam ejector 10 is connected to a 0.8Mpa steam pipeline. The second input end of the steam ejector 10 is connected to the evaporative condenser 9 for extracting the non-condensable gas in the evaporative condenser 9. The pipeline between the steam ejector 10 and the evaporative condenser 9 is connected to the steam ejector 10. An evaporation pressure regulating valve 36 is connected, the input end of the evaporation pressure regulating valve 36 is connected to the atmosphere, the output end of the evaporation pressure regulating valve 36 is connected to the evaporation condenser 9, the bottom of the primary evaporator receiving tank 6 is connected to the top of the primary evaporator 7 through a pipeline, the steam outlet of the primary evaporator 7 is communicated with the primary evaporator separator 8, the steam outlet of the primary evaporator separator 8 is connected to the inlet of the evaporation condenser 9, and the bottoms of the primary evaporator 7 and the primary evaporator separator 8 both enter the bottom of the ammonium nitrate solution tank 11 through a connecting pipeline;

[0027] The ammonium nitrate solution pH adjustment system comprises an ammonium nitrate solution tank 11, on which an agitator 12 is arranged, in which an ammonia adding adjustment pipeline 13 and a water adding and cooling pipeline 14 are arranged, the ammonia adding adjustment pipeline 13 extends to the bottom of the ammonium nitrate solution tank 11, the water adding and cooling pipeline 14 extends to the top of the ammonium nitrate solution tank 11, a No. 2 gas ammonia flowmeter 37 and a No. 2 gas ammonia flow regulating valve 38 are arranged on the ammonia adding adjustment pipeline 13, a water adding and cooling valve 39 is arranged on the water adding and cooling pipeline 14, and a pH online detection component is also connected to the ammonium nitrate solution tank 11, the pH online detection component The components include an ammonium nitrate solution dilution tank 15 and a No. 1 pH meter 16. The inlet of the ammonium nitrate solution dilution tank 15 is connected to the ammonium nitrate solution tank 11 through a pipeline. A water dilution pipeline 17 is also provided on the ammonium nitrate solution dilution tank 15 for fully diluting and cooling the high-temperature ammonium nitrate solution entering the ammonium nitrate solution dilution tank 15. The outlet of the ammonium nitrate solution dilution tank 15 is connected to the No. 1 pH meter 16 through a pipeline to facilitate online pH measurement of the ammonium nitrate solution. An ammonium nitrate solution pump 18 is provided at the outlet of the ammonium nitrate solution tank 11. The outlet pipeline of the ammonium nitrate solution pump 18 is connected to a granulation tower 19 and a pipeline mixer 20.

[0028] The ammonium nitrate solution concentration adjustment and loading system comprises a pipeline mixer 20 and a pump pipe 21, a water adding adjustment pipeline 22 is connected to the pipeline mixer 20, a desalted water flow meter 23 and a desalted water regulating valve 24 are arranged on the water adding adjustment pipeline 22, the outlet of the pipeline mixer 20 is connected to the pump pipe 21 through a pipeline, and an ammonium nitrate solution flow meter 40 and an emergency shut-off valve 41 are arranged on the pipeline between the outlet of the pipeline mixer 20 and the pump pipe 21;

[0029] The process steam washing system comprises an evaporation condensate tank 25, an evaporation condensate pump 26, a neutralization washing tower 5, a No. 2 liquid level regulating valve 27, a neutralization washing pump 28, a No. 2 pH meter 29 and a pH regulating valve 30. The inlet of the evaporation condensate tank 25 is connected to the outlet of the evaporation condenser 9, the outlet of the evaporation condensate tank 25 is connected to the inlet of the evaporation condensate pump 26, the outlet of the evaporation condensate pump 26 is connected to the neutralization washing tower 5 through a pipeline with a No. 2 liquid level regulating valve 27, the liquid level of the neutralization washing tower 5 is controlled by the No. 2 liquid level regulating valve 27, the outlet of the lower part of the neutralization washing tower 5 is connected to the neutralization washing pump 28, the outlet of the neutralization washing pump 28 is connected to the middle part of the neutralization washing tower 5 through a pipeline with a No. 2 pH meter 29, the pipeline of the outlet of the neutralization washing pump 28 is also connected to a nitric acid inlet pipeline with a pH regulating valve 30, and the pipeline of the outlet of the neutralization washing pump 28 is also connected to the reactor flash tank 4.

[0030] A process for producing an intrinsically safe ammonium nitrate solution comprises the following steps:

[0031] S1, neutralization stage: gaseous ammonia and dilute nitric acid are delivered to the tubular reactor 3 through the gaseous ammonia delivery pipeline 1 and the dilute nitric acid delivery pipeline 2, and the flow rate of gaseous ammonia entering the tubular reactor 3 is controlled by the No. 1 gaseous ammonia flowmeter 31 and the No. 1 gaseous ammonia flow regulating valve 32, and the flow rate of dilute nitric acid entering the tubular reactor 3 is controlled by the dilute nitric acid flowmeter 33 and the dilute nitric acid regulating valve 34. In the tubular reactor 3, gaseous ammonia reacts with dilute nitric acid to generate ammonium nitrate solution and release heat. The ammonium nitrate solution after the reaction enters the reactor flash tank 4 for gas-liquid separation to obtain an ammonium nitrate solution with a mass concentration of 78%; the ammonium nitrate solution with a mass concentration of 78% enters the primary evaporator receiving tank 6 from the bottom of the reactor flash tank 4, and the liquid level of the reactor flash tank 4 is controlled by the No. 1 liquid level regulating valve 35; the process steam flashed enters the neutralization washing tower 5 from the upper part of the reactor flash tank 4;

[0032] S2, ammonium nitrate solution evaporation stage: the ammonium nitrate solution with a mass concentration of 78% enters the primary evaporator 7 from the primary evaporator receiving tank 6 for evaporation, and the gas-liquid separation is carried out in the primary evaporator separator. According to the production needs, an ammonium nitrate solution with a mass concentration of 96%-97% or 92%-93% can be obtained. The ammonium nitrate solution enters the ammonium nitrate solution tank 11, and the generated process steam enters the evaporation condenser 9 for condensation and then enters the evaporation condensation liquid tank 25; the evaporation pressure of the primary evaporator 7 is controlled by the evaporation pressure regulating valve 36. When liquid ammonium nitrate and solid ammonium nitrate are co-produced, the evaporation pressure is controlled at 20-30 kPa, and the evaporation temperature is controlled at 140-150°C to obtain a 96-97% ammonium nitrate solution; when only liquid ammonium nitrate is produced, the evaporation pressure is controlled at 35-40 kPa, and the evaporation pressure is controlled at 135-140°C;

[0033] S3, pH adjustment stage of ammonium nitrate solution: the ammonium nitrate solution enters the ammonium nitrate solution tank 11 from the primary evaporator 7 and the primary evaporator separator 8, a small amount of ammonium nitrate solution enters the ammonium nitrate solution dilution tank 15 and is diluted and cooled by adding desalted water, the pH of the ammonium nitrate solution is measured online by a No. 1 pH meter 16, the amount of ammonia added to the ammonium nitrate solution tank 11 is controlled by a No. 2 gas ammonia flowmeter 37 and a No. 2 gas ammonia flow regulating valve 38, the pH of the ammonium nitrate solution is adjusted to 4.5-6, and the ammonium nitrate solution is sent to the pipeline mixer 20 or the granulation tower 19 through the ammonium nitrate solution pump 18; the ammonium nitrate solution tank 11 is provided with an agitator 12 and a water adding and cooling pipeline 14, the function of the agitator 12 is to fully mix and react the ammonium nitrate solution with gas ammonia, the function of the water adding and cooling pipeline 14 is to prevent the ammonium nitrate solution from overheating, when the temperature of the ammonium nitrate solution reaches 180°C, the water adding and cooling valve 39 is opened, and desalted water is added to the ammonium nitrate solution tank 11 for cooling;

[0034] S4, ammonium nitrate solution concentration adjustment and loading stage: in the case of liquid ammonium nitrate and solid ammonium nitrate, the ammonium nitrate solution with a mass concentration of 96-97% enters the pipeline mixer 20, desalted water is added to the pipeline mixer 20 through the water adding adjustment pipeline 22, and the flow rate of desalted water entering the pipeline mixer 20 is adjusted by the desalted water flowmeter 23 and the desalted water regulating valve 24, and the mass concentration of the ammonium nitrate solution is adjusted to 92-93%, and then the ammonium nitrate solution enters the crane pipe 21 for loading;

[0035] S5, process steam washing stage: the process steam flashed out of the reactor flash tank 4 enters the neutralization washing tower 5 from the bottom of the neutralization washing tower 5 for washing, and the washed process steam is used as a heat source for other equipment, and the neutralization washing liquid enters the reactor flash tank 4 for recovery. The evaporation condensate enters the neutralization washing tower 5 from the upper part of the neutralization washing tower 5 through the evaporation condensate pump 26, and the liquid level of the neutralization washing tower 5 is controlled by the neutralization washing tower 5 liquid level regulating valve. A part of the neutralization washing liquid after washing is circulated to the neutralization washing tower 5 through the neutralization washing pump 28 to wash the process steam, and another part of the neutralization washing liquid enters the reactor flash tank 4 through the neutralization washing pump 28 for recovery; the pH of the neutralization washing liquid is adjusted by the pH regulating valve 30, and the pH of the neutralization washing liquid is displayed online by the No. 2 pH meter 29.

[0036] The above shows and describes the main features and advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the utility model.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An intrinsically safe ammonium nitrate solution production system, characterized in that: It includes a neutralization system, an ammonium nitrate solution evaporation system, an ammonium nitrate solution pH adjustment system, an ammonium nitrate solution concentration adjustment and loading system, and a process steam washing system; The neutralization system comprises a gaseous ammonia delivery pipeline (1), a dilute nitric acid delivery pipeline (2), a tubular reactor (3) and a reactor flash tank (4); the gaseous ammonia delivery pipeline (1) is connected to the tubular reactor (3) for delivering gaseous ammonia into the tubular reactor (3); the dilute nitric acid delivery pipeline (2) is connected to the tubular reactor (3) for delivering dilute nitric acid into the tubular reactor (3); the reactor flash tank (4) is connected to the tubular reactor (3) for flash separation of the gas-liquid mixture delivered from the tubular reactor (3); the steam outlet of the reactor flash tank (4) is connected to the bottom of the neutralization washing tower (5) through a pipeline; and the solution outlet at the bottom of the reactor flash tank (4) is connected to the inlet of the primary evaporator receiving tank (6) through a pipeline; The ammonium nitrate solution evaporation system comprises a primary evaporator receiving tank (6), a primary evaporator (7), a primary evaporator separator (8), an evaporative condenser (9) and a steam ejector (10); the top of the primary evaporator receiving tank (6) is connected to the inlet of the evaporative condenser (9) through a pipeline; the first input end of the steam ejector (10) is connected to a 0.8Mpa steam pipeline; the second input end of the steam ejector (10) is connected to the evaporative condenser (9) for extracting non-condensable gas in the evaporative condenser (9); the bottom of the primary evaporator receiving tank (6) is connected to the top of the primary evaporator (7) through a pipeline; the steam outlet of the primary evaporator (7) is in communication with the primary evaporator separator (8); the steam outlet of the primary evaporator separator (8) is connected to the inlet of the evaporative condenser (9); the bottoms of the primary evaporator (7) and the primary evaporator separator (8) both enter the bottom of the ammonium nitrate solution tank (11) through a connecting pipeline; The ammonium nitrate solution pH adjustment system comprises an ammonium nitrate solution tank (11), on which a stirrer (12) is arranged, and in which an ammonia addition adjustment pipeline (13) and a water addition cooling pipeline (14) are arranged, wherein the ammonia addition adjustment pipeline (13) extends to the bottom of the ammonium nitrate solution tank (11), and the water addition cooling pipeline (14) extends to the top of the ammonium nitrate solution tank (11). The ammonium nitrate solution tank (11) is also connected with a pH online detection component, wherein the pH online detection component comprises an ammonium nitrate solution dilution tank (15) and a No. 1 pH meter (16). The inlet of the dilution tank (15) is connected to the ammonium nitrate solution tank (11) through a pipeline. The ammonium nitrate solution dilution tank (15) is also provided with a water dilution pipeline (17) for fully diluting and cooling the high-temperature ammonium nitrate solution entering the ammonium nitrate solution dilution tank (15). The outlet of the ammonium nitrate solution dilution tank (15) is connected to a No. 1 pH meter (16) through a pipeline to facilitate online pH measurement of the ammonium nitrate solution. An ammonium nitrate solution pump (18) is provided at the outlet of the ammonium nitrate solution tank (11). The outlet pipeline of the ammonium nitrate solution pump (18) is connected to a granulation tower (19) and a pipeline mixer (20); The ammonium nitrate solution concentration adjustment and loading system comprises a pipeline mixer (20) and a pump pipe (21), the pipeline mixer (20) is connected to a water adding adjustment pipeline (22), a desalted water flow meter (23) and a desalted water regulating valve (24) are arranged on the water adding adjustment pipeline (22), and the outlet of the pipeline mixer (20) is connected to the pump pipe (21) through a pipeline; The process steam washing system comprises an evaporation condensate tank (25), an evaporation condensate pump (26), a neutralization washing tower (5), a No. 2 liquid level regulating valve (27), a neutralization washing pump (28), a No. 2 pH meter (29) and a pH regulating valve (30), wherein the inlet of the evaporation condensate tank (25) is connected to the outlet of the evaporation condenser (9), the outlet of the evaporation condensate tank (25) is connected to the inlet of the evaporation condensate pump (26), and the outlet of the evaporation condensate pump (26) is connected to the inlet of the evaporation condensate pump (26) through a No. 2 The pipeline of the liquid level regulating valve (27) is connected to the neutralization washing tower (5), and the liquid level of the neutralization washing tower (5) is controlled by the second liquid level regulating valve (27). The outlet of the lower part of the neutralization washing tower (5) is connected to the neutralization washing pump (28), and the outlet of the neutralization washing pump (28) is connected to the middle part of the neutralization washing tower (5) through a pipeline with a second pH meter (29). The pipeline of the outlet of the neutralization washing pump (28) is also connected to a nitric acid inlet pipeline with a pH regulating valve (30).

2. The intrinsically safe ammonium nitrate solution production system according to claim 1, characterized in that: A No. 1 ammonia gas flow meter (31) and a No. 1 ammonia gas flow regulating valve (32) are provided on the ammonia gas delivery pipeline (1), a dilute nitric acid flow meter (33) and a dilute nitric acid regulating valve (34) are provided on the dilute nitric acid delivery pipeline (2), and a No. 1 liquid level regulating valve (35) is provided on the pipeline between the reactor flash tank (4) and the primary evaporator receiving tank (6).

3. The intrinsically safe ammonium nitrate solution production system according to claim 2, characterized in that: An evaporation pressure regulating valve (36) is connected to the pipeline between the steam ejector (10) and the evaporation condenser (9), the input end of the evaporation pressure regulating valve (36) is connected to the atmosphere, and the output end of the evaporation pressure regulating valve (36) is connected to the evaporation condenser (9).

4. The intrinsically safe ammonium nitrate solution production system according to claim 3, characterized in that: A No. 2 gas ammonia flow meter (37) and a No. 2 gas ammonia flow regulating valve (38) are provided on the ammonia adding regulating pipeline (13), and a water adding and cooling valve (39) is provided on the water adding and cooling pipeline (14).

5. The intrinsically safe ammonium nitrate solution production system according to claim 4, characterized in that: An ammonium nitrate solution flow meter (40) and an emergency shut-off valve (41) are arranged on the pipeline between the outlet of the pipeline mixer (20) and the lift pipe (21).

6. The intrinsically safe ammonium nitrate solution production system according to claim 5, characterized in that: The pipeline at the outlet of the neutralization washing pump (28) is also connected to the reactor flash tank (4).

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