Ammonifier for producing calcium ammonium nitrate solution

Abstract

The utility model discloses an ammoniator for producing calcium ammonium nitrate solution, the ammoniator comprises a mixing chamber, an ammoniation chamber, a throat pipe and a diffusion pipe which are connected in sequence, the mixing chamber is respectively communicated with a solution feeding pipe and a gaseous ammonia feeding pipe, the tail end of the solution feeding pipe extends into the mixing chamber, the gaseous ammonia feeding pipe is of an inverted T-shaped structure, and the diffusion pipe is communicated with the solution feeding pipe. The gas ammonia feeding pipe is vertically connected with the mixing chamber; the ammoniation chamber is a horizontally-arranged conical barrel with the large front portion and the small rear portion, the tail of the ammoniation chamber is communicated with the throat pipe, and the tail of the throat pipe is communicated with the diffusion pipe. The device disclosed by the utility model is particularly suitable for producing the calcium ammonium nitrate solution, realizes one-time direct production of the calcium ammonium nitrate solution, avoids the process link of preparing ammonium nitrate, and improves the safety of the device; reaction heat directly heats the solution, so that the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to an ammoniator, in particular to an ammoniator for producing calcium ammonium nitrate solution, belonging to the field of chemical equipment. Background Art

[0002] The production of calcium ammonium nitrate solution usually adopts the normal pressure neutralization reaction of gaseous ammonia and dilute nitric acid to generate ammonium nitrate solution, and then the ammonium nitrate solution is mixed with calcium nitrate solution to prepare calcium ammonium nitrate solution. At present, some domestic enterprises use the ammonium carbonate conversion method to prepare ammonium nitrate and then produce calcium ammonium nitrate solution with calcium nitrate solution, using tower granulation, which basically uses the original ammonium nitrate device to produce calcium ammonium nitrate. This process has the problems of high energy consumption and poor safety. In the document

[2021] No. 64 of the Ministry of Emergency Management and other five ministries and commissions, the sales, purchase and use of ammonium nitrate are managed as civilian explosives, which also restricts the purchase of ammonium nitrate by calcium ammonium nitrate production enterprises.

[0003] Therefore, the calcium ammonium nitrate industry needs to solve this process problem as soon as possible. Utility Model Content

[0004] The utility model provides an ammoniation device for producing calcium ammonium nitrate solution, which fundamentally solves the process problem of using pure ammonium nitrate solution in the production process of calcium ammonium nitrate, and can directly produce calcium ammonium nitrate solution economically and efficiently.

[0005] The utility model solves the problems of high energy consumption and poor safety in the prior art. The principle is that after the calcium nitrate solution containing nitric acid enters the ammoniation device, it directly reacts with the gaseous ammonia coming from another inlet to generate calcium ammonium nitrate solution. The chemical reaction formula is:

[0006] 5Ca(NO3)2+HNO3+NH3+10H2O= 5Ca(NO3)2•NH4NO3•10H2O

[0007] The utility model adopts the following technical solutions:

[0008] An ammoniaizer for producing calcium ammonium nitrate solution, the ammoniaizer comprising a mixing chamber, an ammoniaizing chamber, a throat and a diffusion tube connected in sequence, the mixing chamber being respectively connected with a solution feed tube and a gas ammonia feed tube, the end of the solution feed tube extending into the mixing chamber, the gas ammonia feed tube being an inverted T-shaped structure, and being vertically connected to the mixing chamber; the ammoniaizing chamber being a horizontally placed conical cylinder with a larger front and a smaller rear, the tail of the ammoniaizing chamber being connected with the throat, and the tail of the throat being connected with the diffusion tube.

[0009] In the above device, the ratio of the length of the ammoniation chamber to the diameter of the inlet end is 0.6-1, the cone angle of the ammoniation chamber is in the range of 15-45°, the length-diameter ratio of the throat is 10-15, the cone angle of the diffusion tube is 5-15°, and the diameter of the end of the diffusion tube is equal to the diameter of the inlet end of the ammoniation chamber. The diameter ratio of the solution feed pipe to the mixing chamber is 0.6-0.8.

[0010] In the above device, the ends of the solution feed pipe, the gas ammonia feed pipe, the mixing chamber and the ammoniation chamber are flange structures, and adjacent components are connected by flanges and bolts respectively.

[0011] In the above device, a hollow atomizing nozzle is provided at the end of the solution feeding pipe, the end of the hollow atomizing nozzle is conical, and the hollow atomizing nozzle faces the direction of the ammoniation chamber.

[0012] In the above device, the vertical pipe section of the gas ammonia feed pipe is tangentially connected to the horizontal section of the mixing chamber.

[0013] The end of the solution feed pipe is close to the inlet of the ammoniation chamber, that is, the ammonia gas entering the gas ammonia feed pipe is initially contacted and mixed with the solution in the mixing chamber, and then enters the ammoniation chamber for reaction; the gas ammonia feed pipe is vertically connected to the mixing chamber pipeline, and the main pipeline cavity of the mixing chamber is a circular solution feed pipe, and the gas and liquid do not contact. The solution enters the ammoniation chamber through the hollow atomizing nozzle at the end of the solution feed pipe, and the solution and gas ammonia are fully mixed in the ammoniation chamber for reaction. The utility model is used for producing calcium ammonium nitrate, and the solution feed includes two solutions of calcium nitrate and nitric acid, and the two enter the solution feed pipe together as a mixed solution.

[0014] The throat is a cylindrical structure, and the materials are fully mixed in the throat to perform supplementary reaction.

[0015] The diffusion tube is a gradually expanding conical tube structure, and the completely reacted materials flow out after being pressurized and decelerated through the diffusion tube.

[0016] The beneficial effects of the utility model are:

[0017] (1) Directly produce calcium ammonium nitrate solution in one go, avoiding the process of preparing ammonium nitrate and improving the safety of the device;

[0018] (2) The equipment has a simple structure and is easy to use;

[0019] (3) The reaction heat directly heats the solution, reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] In the figure: 1: solution feed pipe; 2: gas ammonia feed pipe; 3: ammoniazing chamber; 4: throat; 5: diffusion tube; 6: hollow atomizing nozzle; 7: flange; 8: gasket; 9: bolt; 10: mixing chamber. DETAILED DESCRIPTION

[0022] The present invention is further illustrated by the following examples, but is not limited to the following examples.

[0023] like Figure 1 As shown, an ammoniation device for producing calcium ammonium nitrate solution is a tubular reactor, which includes a mixing chamber 10, an ammoniation chamber 3, a throat 4 and a diffusion tube 5 connected in sequence, the mixing chamber is communicated with a solution feed pipe 1 and a gas ammonia feed pipe 2 respectively; the end of the solution feed pipe 1 extends into the mixing chamber 10, the gas ammonia feed pipe 2 is an inverted T-shaped structure, and the gas ammonia feed pipe 2 is vertically connected to the mixing chamber 10; the ammoniation chamber 3 is a horizontally placed conical cylinder with a larger front and a smaller rear, the tail of the ammoniation chamber 3 is communicated with the throat 4, and the tail of the throat 4 is communicated with the diffusion tube 5.

[0024] In the above device, the ratio of the length of the ammoniation chamber 3 to the inlet diameter is 0.6-1, the cone angle range of the ammoniation chamber 3 is 15-45°, the length-to-diameter ratio of the throat 4 is 10-15, the cone angle of the diffusion tube 5 is 5-15°, and the diameter of the end of the diffusion tube 5 is equal to the diameter of the inlet of the ammoniation chamber 3. The diameter ratio of the solution feed pipe 1 to the mixing chamber is 0.6-0.8.

[0025] A hollow atomizing nozzle 6 is provided at the end of the solution feeding pipe 1. The end of the hollow atomizing nozzle is conical. The hollow atomizing nozzle faces the direction of the ammonia chamber. Under the action of the surrounding gas ammonia, the liquid can be better atomized and react with the gas ammonia.

[0026] In the above device, the ends of the solution feed pipe, the gas ammonia feed pipe, the mixing chamber and the ammoniation chamber are flange structures, and adjacent components are connected by flanges 7, gaskets 8 and bolts 9 respectively.

[0027] from Figure 1 In the figure, the end of the solution feed pipe 1 is close to the inlet of the ammoniation chamber 3, that is, the ammonia gas entering the gas ammonia feed pipe 1 is initially contacted and mixed with the solution in the mixing chamber 10, and then enters the ammoniation chamber 3 for reaction; the gas ammonia feed pipe 2 is vertically connected to the mixing chamber 10 pipeline, and the main pipeline cavity of the mixing chamber 10 is a circular solution feed pipe 1, and the gas and liquid do not contact before feeding. The utility model is used for the production of calcium ammonium nitrate, and the solution raw materials include two solutions of calcium nitrate and nitric acid, and the two enter the solution feed pipe together as a mixed solution. The mixed solution enters the ammoniation chamber through the hollow atomizing nozzle 6 at the end of the solution feed pipe, and the solution and gas ammonia are fully mixed in the ammoniation chamber to react.

[0028] The throat pipe 4 is a cylindrical structure, and the materials are fully mixed in the throat pipe for supplementary reaction. The diffusion pipe 5 is a gradually expanding conical tube structure, and the materials that have reacted completely flow out after being pressurized and decelerated through the diffusion pipe.

[0029] The utility model is used to produce calcium ammonium nitrate solution by an ammonifier process:

[0030] See attached Figure 1 The calcium nitrate and nitric acid mixed solution coming from the solution feed pipe 1 is atomized by the hollow atomizing nozzle 6 and then enters the ammoniation chamber 3. It is initially contacted and mixed with the gaseous ammonia coming from the gaseous ammonia feed pipe 2 in the mixing chamber 10, and then enters the ammoniation chamber 3 for an ammoniation reaction. The molar ratio of calcium nitrate, nitric acid and gaseous ammonia is controlled at about 5:1:1. Then, an ammoniation supplementary reaction is carried out in the throat 4. The heat released by the ammoniation reaction increases the solution temperature by 10-20°C (satisfying the reaction conditions). The completely reacted liquid flows out through the diffusion tube 5 to finally obtain a calcium ammonium nitrate solution.

Claims

1. An ammoniation apparatus for producing calcium ammonium nitrate solution, characterized in that: The ammoniator comprises a mixing chamber, an ammoniating chamber, a throat and a diffusion tube which are connected in sequence. The mixing chamber is communicated with a solution feed tube and a gas ammonia feed tube respectively. The end of the solution feed tube extends into the mixing chamber. The gas ammonia feed tube is an inverted T-shaped structure, and the gas ammonia feed tube is vertically connected to the mixing chamber. The ammoniating chamber is a horizontally placed conical cylinder with a larger front and a smaller rear. The tail of the ammoniating chamber is communicated with the throat, and the tail of the throat is communicated with the diffusion tube.

2. The ammonifier for producing calcium ammonium nitrate solution according to claim 1, characterized in that: The ratio of the length of the ammoniation chamber to the inlet diameter is 0.6~1, the corresponding cone angle range of the ammoniation chamber is 15-45°, the aspect ratio of the throat is 10~15, the cone angle of the diffuser is 5~15°, and the diameter of the diffuser end is equal to the diameter of the inlet end of the ammoniation chamber.

3. The ammonifier for producing calcium ammonium nitrate solution according to claim 1, characterized in that: The diameter ratio of the solution feed pipe to the mixing chamber is 0.6-0.

8.

4. The ammonifier for producing calcium ammonium nitrate solution according to claim 1, characterized in that: The ends of the solution feed pipe, the gas ammonia feed pipe, the mixing chamber and the ammoniation chamber are flange structures, and adjacent components are connected by flanges and bolts respectively.

5. The ammoniation device for producing calcium ammonium nitrate solution according to claim 1, characterized in that: A hollow atomizing nozzle is arranged at the end of the solution feeding pipe, the end of the hollow atomizing nozzle is conical, and the hollow atomizing nozzle faces the direction of the ammoniation chamber.

6. The ammoniation device for producing calcium ammonium nitrate solution according to claim 1, characterized in that: The vertical pipe section of the gas ammonia feed pipe is tangentially connected to the horizontal section of the mixing chamber.

7. The ammoniation device for producing calcium ammonium nitrate solution according to claim 1, characterized in that: The throat is a cylindrical structure, and the materials are fully mixed in the throat to perform supplementary reaction.

8. The ammoniation device for producing calcium ammonium nitrate solution according to claim 1, characterized in that: The diffusion tube is a gradually expanding conical tube structure, and the completely reacted materials flow out after being pressurized and decelerated through the diffusion tube.

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