Equipment for efficiently preparing ammonia from urea

Abstract

The utility model provides high-efficiency urea ammonia production equipment which comprises a urea solution storage tank, the urea solution storage tank is connected with a liquid inlet of a pyrolysis tank through a pipeline, a plurality of nozzles are arranged at the liquid inlet, a conveying pump is arranged on a connecting pipe of the urea solution storage tank and the pyrolysis tank, a booster fan is arranged on one side of the pyrolysis tank, and a plurality of nozzles are arranged on the other side of the pyrolysis tank. An air outlet end of the booster fan is connected with an air inlet of the pyrolysis tank through a pipeline, an electric heater is arranged between the booster fan and the pyrolysis tank, an air pipe is arranged in the pyrolysis tank, the air pipe is arranged below the nozzle, the air pipe is fixed with the inner wall of the pyrolysis tank through a connecting block, the air pipe is annular, and a plurality of air taps are fixedly arranged on the air pipe. Through the cooperation of the booster fan, the electric heater, the gas pipe and the baffle plate, the problems of incomplete urea pyrolysis reaction and low ammonia production efficiency are solved; the electric heater is electrically connected with the electric control valve, the urea pyrolysis efficiency is adjusted according to the requirement of ammonia gas, and the electric energy consumption is greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of urea pyrolysis, and more specifically, to a urea high-efficiency ammonia production device. Background Art

[0002] As an important chemical raw material, urea is widely used in agriculture, industry and other fields. In the process of urea ammonia production, urea pyrolysis equipment often has poor mixing effect between urea solution and hot air, resulting in incomplete urea pyrolysis reaction, low ammonia production efficiency and high energy consumption. Therefore, a new type of urea high-efficiency ammonia production equipment is needed to improve the urea pyrolysis efficiency and reduce energy consumption. Utility Model Content

[0003] The utility model provides a urea high-efficiency ammonia production device, which solves the problem of low ammonia production efficiency due to incomplete urea pyrolysis reaction through the cooperation of a booster fan, an electric heater, an air pipe and a baffle; the electric heater is electrically connected to an electric control valve, and the urea pyrolysis efficiency is adjusted according to the demand for ammonia, thereby greatly reducing the power consumption.

[0004] The utility model is realized through the following technical solutions.

[0005] A urea high-efficiency ammonia production device comprises: a urea solution storage tank; a pyrolysis tank, wherein the urea solution storage tank is connected to a liquid inlet of the pyrolysis tank through a pipeline, and a plurality of nozzles are arranged at the liquid inlet of the pyrolysis tank; a transport pump is arranged on the connecting pipe between the urea solution storage tank and the pyrolysis tank, a booster fan is arranged on one side of the pyrolysis tank, an air outlet end of the booster fan is connected to an air inlet of the pyrolysis tank through a pipeline, an electric heater is arranged between the booster fan and the pyrolysis tank, an air pipe is arranged in the pyrolysis tank, the air pipe is arranged below the nozzle, the air pipe is fixed to the inner wall of the pyrolysis tank through a connecting block, the air pipe is annular, and a plurality of air nozzles are fixed on the air pipe.

[0006] The electric heater installed between the booster fan and the pyrolysis tank heats the gas to provide the heat required for pyrolysis. The gas pipe is S-shaped to enhance the mixing effect of urea solution and high-temperature gas, thereby improving the pyrolysis efficiency.

[0007] In a further technical solution, in order to accelerate the pyrolysis of the urea solution, baffles are fixedly provided on the inner wall of the pyrolysis tank and are tilted downward by 30° to 45° horizontally. The baffles are staggeredly arranged on the inner wall of the pyrolysis tank.

[0008] It is used to guide the flow of urea solution and further promote the mixing and reaction of urea solution and high-temperature gas.

[0009] Furthermore, in order to ensure uniform temperature in the pyrolysis tank, a branch pipe is provided on the air pipe, the branch pipe is fixed to the inner wall of the pyrolysis tank through a support plate, and a plurality of air holes are provided on the branch pipe at equal intervals.

[0010] This allows the hot air to be more evenly distributed inside the pyrolysis tank, further improving the pyrolysis efficiency.

[0011] Furthermore, in order to prevent the temperature in the pyrolysis tank from dissipating, an interlayer is provided on the pyrolysis tank, and an insulation layer is provided in the interlayer.

[0012] The setting of the insulation layer effectively reduces the heat loss of the pyrolysis tank and improves the thermal energy utilization efficiency.

[0013] Furthermore, in order to save power consumption of the electric heater, an electric control valve is provided at the gas outlet of the pyrolysis tank, and the electric control valve is electrically connected to the electric heater through a controller.

[0014] When the required amount of ammonia is small, the electric control valve is adjusted to a smaller value. The controller receives a signal to reduce the power consumption of the electric heater, thereby lowering the temperature in the furnace and slowing down the thermal decomposition of the urea solution.

[0015] Furthermore, in order to facilitate the discharge of water in the pyrolysis tank, a liquid outlet is provided at the bottom of the pyrolysis tank, and a valve is provided on the liquid outlet.

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

[0017] The present application realizes uniform mixing and efficient reaction of urea solution and hot air through the cooperation of a booster fan, an electric heater, an air pipe and a baffle, significantly improving the pyrolysis efficiency of urea. A branch pipe and a plurality of air holes are arranged on the air pipe, so that the hot air can be more evenly distributed inside the pyrolysis tank, further improving the pyrolysis efficiency, making the reaction more thorough, and reducing the unreacted urea residue.

[0018] In addition, by setting up an electrical connection between the electric control valve and the electric heater, precise control of the pyrolysis process is achieved. When the amount of ammonia required is reduced, the power consumption of the electric heater is reduced, making the equipment operation more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the practical pyrolysis tank;

[0020] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the pyrolysis tank of the utility model;

[0022] In the figure: 1. urea solution storage tank; 2. pyrolysis tank; 201. liquid inlet; 202. air inlet; 203. air outlet; 204. nozzle; 205. connecting block; 206. liquid outlet; 3. transport pump; 4. booster fan; 5. electric heater; 6. air pipe; 7. air nozzle; 8. baffle; 9. branch pipe; 10. air hole; 11. interlayer; 12. electric control valve; 13. valve. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other technical solutions can be obtained based on the provided drawings without paying creative work.

[0024] Example 1

[0025] Combination Figure 1 to Figure 3 The utility model is a urea efficient ammonia production device, comprising: a urea solution storage tank 1; a pyrolysis tank 2, wherein the urea solution storage tank 1 is connected to a liquid inlet 201 of the pyrolysis tank 2 through a pipeline, and a plurality of nozzles 204 are arranged at the liquid inlet 201 of the pyrolysis tank 2; a transport pump 3 is arranged on the connecting pipe between the urea solution storage tank 1 and the pyrolysis tank 2, a booster fan 4 is arranged on one side of the pyrolysis tank 2, and an air outlet end of the booster fan 4 is connected to an air inlet 202 of the pyrolysis tank 2 through a pipeline, and an electric Heater 5, an air pipe 6 is arranged in the pyrolysis tank 2, the air pipe 6 is arranged below the nozzle 204, the air pipe 6 is fixed to the inner wall of the pyrolysis tank 2 through a connecting block 205, the air pipe 6 is annular, and a plurality of air nozzles 7 are fixedly arranged on the air pipe 6, a baffle 8 with a horizontal downward inclination of 30° to 45° is fixedly arranged on the inner wall of the pyrolysis tank 2, the baffle 8 is staggered on the inner wall of the pyrolysis tank 2, a branch pipe 9 is arranged on the air pipe 6, the branch pipe 9 is fixed to the inner wall of the pyrolysis tank 2 through a support plate, and a plurality of air holes 10 are evenly spaced on the branch pipe 9.

[0026] During the implementation process, the urea solution storage tank 1 is connected to the liquid inlet 201 of the pyrolysis tank 2 through a pipeline. The transport pump 3 on the pipeline facilitates the stable transportation of the urea solution to the pyrolysis tank 2. A nozzle 204 is provided at the liquid inlet 201 so that the urea solution can be evenly sprayed into the pyrolysis tank 2 to provide the required hot air for the pyrolysis tank 2. The air outlet end of the booster fan 4 is connected to the air inlet 202 of the pyrolysis tank 2 through a pipeline. An electric heater 5 is provided between the booster fan 4 and the pyrolysis tank 2 to heat the air to meet the temperature conditions required for pyrolysis. An air pipe 6 is provided inside the pyrolysis tank 2, and the air pipe 6 is connected to the pyrolysis tank 2 through a connecting block 205. The inner wall of the pyrolysis tank 2 is fixed, and the air pipe 6 is fixedly connected to the air inlet 202. The air pipe 6 is annular, and a plurality of air nozzles 7 are fixedly arranged on the air pipe 6, so that the hot air can be evenly distributed in the pyrolysis tank 2. The air pipe 6 is arranged below the nozzle 204 to improve the mixing effect of the urea solution and the hot air. In order to further improve the mixing effect, a baffle 8 with a horizontal downward inclination of 30° to 45° is also fixedly arranged on the inner wall of the pyrolysis tank 2. The baffles 8 are arranged in a staggered manner. The baffles 8 can not only guide the flow direction of the urea solution, but also increase the contact area between the urea solution and the hot air, thereby improving the pyrolysis efficiency. In addition, a branch pipe 9 is also arranged on the air pipe 6. The branch pipe 9 is fixed on the inner wall of the pyrolysis tank 2 through a support plate, and a plurality of air holes 10 are evenly spaced thereon, so that the hot air can be further evenly distributed in the pyrolysis tank 2 through the branch pipe 9 and the air holes 10, thereby enhancing the pyrolysis effect.

[0027] In actual operation, the urea solution is transported to the pyrolysis tank 2 through the transport pump 3, and the booster fan 4 sends air to the electric heater 5, which heats the air to 600°C. At 600°C, urea is most likely to be pyrolyzed to produce ammonia. The air is then sent to the pyrolysis tank 2, where the urea solution is fully mixed with the hot air and undergoes a pyrolysis reaction to produce ammonia and other products. Finally, the product is discharged through the outlet 203 of the pyrolysis tank 2, completing the entire ammonia production process.

[0028] Example 2

[0029] Combination Figure 3 On the basis of the first embodiment, an interlayer 11 is provided on the pyrolysis tank 2, and an insulation layer is provided in the interlayer 11. An electric control valve 12 is provided at the gas outlet 203 of the pyrolysis tank 2, and the electric control valve 12 is electrically connected to the electric heater 5 through a controller. A liquid outlet 206 is provided at the bottom of the pyrolysis tank 2, and a valve 13 is provided on the liquid outlet 206.

[0030] During the implementation process, an insulation layer is provided in the interlayer 11. The setting of the insulation layer effectively reduces the heat loss of the pyrolysis tank 2 and improves the thermal energy utilization efficiency. When the amount of ammonia required later is small, the electric control valve 12 is adjusted down, and the controller receives the signal. The controller controls the temperature of the electric heater 5 to reduce the temperature in the pyrolysis tank 2, thereby slowing down the pyrolysis of the urea solution, thereby reducing the power consumption of the electric heater 5, and making the equipment run more stably and reliably. A liquid outlet 206 is provided at the bottom of the pyrolysis tank 2 to facilitate the discharge of water in the pyrolysis tank.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solution recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A urea efficient ammonia production equipment, characterized in that: include: Urea solution storage tank (1); The pyrolysis tank (2), the urea solution storage tank (1) and the liquid inlet (201) of the pyrolysis tank (2) are connected via a pipeline, and a plurality of nozzles (204) are provided at the liquid inlet (201) of the pyrolysis tank (2); A transport pump (3) is provided on the connecting pipe between the urea solution storage tank (1) and the pyrolysis tank (2); a booster fan (4) is provided on one side of the pyrolysis tank (2); an air outlet of the booster fan (4) is connected to an air inlet (202) of the pyrolysis tank (2) through a pipeline; an electric heater (5) is provided between the booster fan (4) and the pyrolysis tank (2); an air pipe (6) is provided in the pyrolysis tank (2); the air pipe (6) is provided below the nozzle (204); the air pipe (6) is fixed to the inner wall of the pyrolysis tank (2) through a connecting block (205); the air pipe (6) is annular; and a plurality of air nozzles (7) are fixedly provided on the air pipe (6).

2. The urea efficient ammonia production equipment according to claim 1, characterized in that: Baffles (8) are fixedly arranged on the inner wall of the pyrolysis tank (2) and are tilted downward at a horizontal angle of 30° to 45°. The baffles (8) are arranged in a staggered manner on the inner wall of the pyrolysis tank (2).

3. The urea efficient ammonia production equipment according to claim 1, characterized in that: The air pipe (6) is provided with a branch pipe (9), which is fixed to the inner wall of the pyrolysis tank (2) through a support plate, and a plurality of air holes (10) are provided on the branch pipe (9) at equal intervals.

4. The urea efficient ammonia production equipment according to claim 1, characterized in that: The pyrolysis tank (2) is provided with an interlayer (11), and a heat-insulating layer is provided inside the interlayer (11).

5. The urea efficient ammonia production equipment according to claim 1, characterized in that: An electric control valve (12) is provided at the gas outlet (203) of the pyrolysis tank (2), and the electric control valve (12) is electrically connected to the electric heater (5) through a controller.

6. The urea efficient ammonia production equipment according to claim 1, characterized in that: The bottom of the pyrolysis tank (2) is provided with a liquid outlet (206), and a valve (13) is provided on the liquid outlet (206).

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