CN211005152U - Urea melting device is used in water-soluble fertile production of high tower granulation - Google Patents
Urea melting device is used in water-soluble fertile production of high tower granulation Download PDFInfo
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- CN211005152U CN211005152U CN201922097230.5U CN201922097230U CN211005152U CN 211005152 U CN211005152 U CN 211005152U CN 201922097230 U CN201922097230 U CN 201922097230U CN 211005152 U CN211005152 U CN 211005152U
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Abstract
A urea melting device for producing a high-tower granulation water-soluble fertilizer comprises a urea melting kettle, a heat-conducting oil circulation electric heating furnace and an ammonia absorption tank; the top of urea melting cauldron is equipped with agitator motor, agitator motor drives vertical setting through the pivot and rotates at the internal (mixing) shaft of urea melting cauldron, top-down evenly is equipped with multiunit stainless steel stirring rake on the (mixing) shaft, the top of urea melting cauldron still is equipped with material import and ammonia discharge port, the ammonia discharge port is connected to through the pipeline of taking the valve in the ammonia absorption tank. The utility model discloses utilize the conduction oil to do heat transfer medium, the accuse temperature is more accurate, reduces the temperature difference of firing equipment and urea contact segment, reduces the production of biuret. Stirring motor and multiunit stainless steel stirring rake can homogenize the internal urea of cauldron for the heat absorbs evenly, thereby avoids local overheat, further reduces the production of biuret.
Description
Technical Field
The utility model relates to a fertilizer production facility field, concretely relates to water-soluble fertile production of high tower granulation is with urea melting device.
Background
The melting temperature of the agricultural urea is 130 ℃, when the melting temperature exceeds 130 ℃, biuret substances can be generated in the urea, and if the content of the biuret in fertilizers applied in industry exceeds standard, seedling burning can be caused, so that the harm to crops is large. In the actual fertilizer production process, in order to improve the melting efficiency and reduce the cost, saturated steam generated by a coal-fired boiler is generally used for heating urea particles through a coil pipe to be melted into liquid in a melting tank, and the saturated steam is used as a heat transfer medium. However, the steam coil needs to bear larger steam pressure, and the wall of the steam coil needs to be made thicker, which affects the heat transfer efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a urea melting device is used in water-soluble fertile production of high tower granulation to above-mentioned defect.
The utility model comprises a urea melting kettle, a heat-conducting oil circulation electric heating furnace and an ammonia absorption tank;
the top of the urea melting kettle is provided with a stirring motor, the stirring motor drives a stirring shaft vertically arranged in the urea melting kettle body to rotate through a rotating shaft, a plurality of groups of stainless steel stirring paddles are uniformly arranged on the stirring shaft from top to bottom, the top of the urea melting kettle is also provided with a material inlet and an ammonia gas discharge port, and the ammonia gas discharge port is connected into the ammonia gas absorption tank through a pipeline with a valve;
the urea melting kettle is internally provided with a spiral coil from top to bottom, an inlet of the spiral coil is positioned at the bottom of the urea melting kettle, an outlet of the spiral coil is positioned at the upper part of the urea melting kettle and is positioned at the same side of a kettle body of the urea melting kettle as the inlet of the spiral coil, a plurality of groups of stainless steel stirring paddles are positioned in a vertical space formed by the spiral coil and are not in contact with the spiral coil, an outlet of the spiral coil is connected to an oil inlet at the top of the heat-conducting oil circulation electric heating furnace through a heat-conducting oil return pipe, an inlet of the spiral coil is connected with an oil outlet at the bottom of the heat-conducting oil circulation electric heating furnace through a heat-conducting oil feed pipe, the heat-conducting oil feed pipe is provided with a heat-conducting oil conveying pump.
And a flow control valve is arranged on the liquid discharge channel.
And the outside of the kettle body of the urea melting kettle is wrapped with a heat-insulating layer.
And the group of heat conduction fins consists of two heat conduction fins which are symmetrically arranged along the central axis of the spiral coil pipe body.
The heat conduction fins are of arc-shaped sheet structures.
The utility model has the advantages that: the heat conduction oil is used as a heat transfer medium, and high-temperature steam is not used as a heat conduction source, so that the temperature control is more accurate, the temperature difference of the contact part of the heating equipment and the urea is reduced, and the generation of biuret is reduced. Stirring motor and multiunit stainless steel stirring rake can homogenize the internal urea of cauldron for the heat absorbs evenly, thereby avoids local overheat, further reduces the production of biuret.
Description of the drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural view of a spiral coil in a urea melting kettle.
Fig. 3 is a schematic structural diagram of a heat-conducting fin on a spiral coil.
Fig. 4 is a schematic cross-sectional view of a heat-conducting fin.
Detailed Description
As shown in the attached drawing, the utility model comprises a urea melting kettle 1, a heat-conducting oil circulation electric heating furnace 2 and an ammonia absorption tank 3;
the top of the urea melting kettle 1 is provided with a stirring motor 4, the stirring motor 4 drives a stirring shaft 5 vertically arranged in the urea melting kettle 1 through a rotating shaft to rotate, a plurality of groups of stainless steel stirring paddles 6 are uniformly arranged on the stirring shaft 5 from top to bottom, the top of the urea melting kettle 1 is also provided with a material inlet 7 and an ammonia gas discharge port 8, and the ammonia gas discharge port 8 is connected into the ammonia gas absorption tank 3 through a pipeline with a valve;
the urea melting kettle 1 is internally provided with a spiral coil 9 from top to bottom, the inlet of the spiral coil 9 is positioned at the bottom of the urea melting kettle 1, the outlet of the spiral coil 9 is positioned at the upper part of the urea melting kettle 1 and is positioned at the same side of the kettle body of the urea melting kettle 1 as the inlet of the spiral coil 9, a plurality of groups of stainless steel stirring paddles 6 are positioned in a vertical space formed by the spiral coil 9, and the plurality of groups of stainless steel stirring paddles 6 are not contacted with the spiral coil 9, the outlet of the spiral coil 9 is connected to the oil inlet at the top of the heat-conducting oil circulation electric heating furnace 2 through a heat-conducting oil return pipe 10, the inlet of the spiral coil 9 is connected with the oil outlet at the bottom of the heat-conducting oil circulation electric heating furnace 2 through a heat-conducting oil inlet pipe 11, the heat conduction oil feeding pipe 11 is provided with a heat conduction oil conveying pump 12, the pipe wall of the spiral coil pipe 9 is welded with a group of heat conduction fins 13, and the bottom of the urea melting kettle 1 is provided with a liquid drainage channel 14.
The liquid discharge channel 14 is provided with a flow control valve.
The outside of the urea melting kettle 1 is wrapped with a heat insulation layer.
The group of heat conducting fins 13 is composed of two heat conducting fins 13 symmetrically arranged along the central axis of the tube body of the spiral coil 9.
The heat conducting fins 13 are of an arc-shaped sheet structure.
The working principle is as follows: urea is added from a material inlet 7 at the top of the urea melting kettle 1, then a stirring motor 4 drives a plurality of groups of stainless steel stirring paddles 6 in the kettle body to stir, meanwhile, a heat conduction oil circulation electric heating furnace 2 sends heated heat conduction oil into the spiral coil pipe 9 through a heat conduction oil liquid inlet pipe 11 and a heat conduction oil delivery pump 12 to heat and melt the urea in the kettle body, and the heat conduction oil flows back to the heat conduction oil circulation electric heating furnace 2 through a heat conduction oil return pipe 10 to be recycled; the welding has a set of heat conduction fin 13 on helical coil 9's the pipe wall, and a set of heat conduction fin 13 comprises two heat conduction fins 13 along the central axis symmetry setting of helical coil 9 body, has effectively increased the area of contact of helical coil 9 with urea, has improved heating efficiency. Meanwhile, urea can be decomposed to generate a small amount of ammonia gas in the melting process, the ammonia gas discharge port 8 is arranged at the top of the urea melting kettle 1, and the ammonia gas discharge port 8 is connected into the ammonia gas absorption tank 3 through a pipeline with a valve, so that the generated ammonia gas can be completely absorbed, and the environment pollution is avoided. The utility model discloses utilize the conduction oil to do heat transfer medium, rather than utilizing high-temperature steam as leading the heat source, the accuse temperature is more accurate, reduces the temperature difference of firing equipment and urea contact segment, reduces the production of biuret. Stirring motor and multiunit stainless steel stirring rake can homogenize the internal urea of cauldron for the heat absorbs evenly, thereby avoids local overheat, further reduces the production of biuret.
Claims (5)
1. A urea melting device for producing a high-tower granulation water-soluble fertilizer is characterized by comprising a urea melting kettle (1), a heat-conducting oil circulation electric heating furnace (2) and an ammonia absorption tank (3);
the top of the urea melting kettle (1) is provided with a stirring motor (4), the stirring motor (4) drives a stirring shaft (5) vertically arranged in the urea melting kettle (1) through a rotating shaft to rotate, a plurality of groups of stainless steel stirring paddles (6) are uniformly arranged on the stirring shaft (5) from top to bottom, the top of the urea melting kettle (1) is also provided with a material inlet (7) and an ammonia gas discharge port (8), and the ammonia gas discharge port (8) is connected into the ammonia gas absorption tank (3) through a pipeline with a valve;
the urea melting kettle (1) is internally provided with a spiral coil (9) from top to bottom, the inlet of the spiral coil (9) is positioned at the bottom of the urea melting kettle (1), the outlet of the spiral coil (9) is positioned at the upper part of the urea melting kettle (1) and is positioned at the same side of the kettle body of the urea melting kettle (1) as the inlet of the spiral coil (9), a plurality of groups of stainless steel stirring paddles (6) are positioned in a vertical space formed by the spiral coil (9), the plurality of groups of stainless steel stirring paddles (6) are not contacted with the spiral coil (9), the outlet of the spiral coil (9) is connected to an oil inlet at the top of the heat-conducting oil circulating electric heating furnace (2) through a heat-conducting oil return pipe (10), the inlet of the spiral coil (9) is connected with an oil outlet at the bottom of the heat-conducting oil circulating electric heating furnace (2) through a heat-conducting, the pipe wall of the spiral coil pipe (9) is welded with a group of heat conduction fins (13), and the bottom of the urea melting kettle (1) is provided with a liquid drainage channel (14).
2. The urea melting device for producing the high tower granulation water soluble fertilizer as recited in claim 1, characterized in that the drainage channel (14) is provided with a flow control valve.
3. The urea melting device for producing the high-tower granulated water-soluble fertilizer as claimed in claim 1, wherein the outside of the urea melting kettle (1) is wrapped with an insulating layer.
4. The urea melting device for producing the high-tower granulated water-soluble fertilizer as claimed in claim 1, wherein the group of heat conducting fins (13) consists of two heat conducting fins symmetrically arranged along the central axis of the tube body of the spiral coil (9).
5. The urea melting device for producing the high-tower granulation water-soluble fertilizer as claimed in claim 4, wherein the heat-conducting fins (13) are of arc-shaped sheet structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922097230.5U CN211005152U (en) | 2019-11-29 | 2019-11-29 | Urea melting device is used in water-soluble fertile production of high tower granulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922097230.5U CN211005152U (en) | 2019-11-29 | 2019-11-29 | Urea melting device is used in water-soluble fertile production of high tower granulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211005152U true CN211005152U (en) | 2020-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922097230.5U Active CN211005152U (en) | 2019-11-29 | 2019-11-29 | Urea melting device is used in water-soluble fertile production of high tower granulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211005152U (en) |
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2019
- 2019-11-29 CN CN201922097230.5U patent/CN211005152U/en active Active
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