Drying and cooling equipment for diammonium phosphate production
By designing a diammonium phosphate production equipment with integrated drying and cooling functions, drying with air pump heating and inclined air outlets, and cooling through cooling pipes and liquid ammonia, the problem of separate treatment of drying and cooling processes in the prior art is solved, and efficient drying and cooling is achieved, reducing costs and improving efficiency.
Patent Information
- Application Number
- CN202421847215.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-31
AI Technical Summary
In the existing diammonium phosphate production process, the drying and cooling processes are processed separately, which increases equipment costs and has limited cooling effects, resulting in large workload and low efficiency.
A drying and cooling equipment including a drying box, a heating box, a connecting pipe, an air pump, a cooling pipe and a cooling pipe are designed. Gas is extracted and heated through the air pump, and the inclined air outlet and a cooling pipe are used for full drying and cooling, and the cooling effect is further improved by liquid ammonia as a coolant.
It realizes efficient drying and cooling of diammonium phosphate particles, reduces equipment costs, improves production efficiency, and improves energy-saving and environmental protection through heat recovery and reuse.
Smart Images
Figure CN223020798U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of diammonium phosphate production, in particular to a drying and cooling device for diammonium phosphate production. Background Art
[0002] Diammonium phosphate is a compound fertilizer containing two nutrient components of nitrogen and phosphorus, which is suitable for various crops and soils, especially for crops that like nitrogen and need phosphorus. It can be used as a base fertilizer or top dressing, and it is advisable to apply it deeply. During the production process of diammonium phosphate, it is necessary to dry the diammonium phosphate particles formed after spray granulation treatment. Generally, the drying treatment is carried out in a dryer. After drying, the temperature of the diammonium phosphate is relatively high, and it needs to be cooled before being bagged.
[0003] At present, the produced diammonium phosphate is generally dried and cooled by different devices. The drying and cooling processes are treated separately, which increases the equipment cost. Moreover, the cooling effect on diammonium phosphate is limited. It is also necessary to place the cooled diammonium phosphate in a bulk material storage to cool naturally, which increases the workload and reduces the work efficiency. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the problems in the prior art, and to provide a drying and cooling device for diammonium phosphate production with high efficiency and good cooling effect.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A drying and cooling device for diammonium phosphate production, comprising:
[0007] A housing, with a feed inlet provided at its top;
[0008] A drying box, which is arranged inside the housing. A plurality of air outlets are horizontally spaced on the outer wall of the drying box;
[0009] A heating box, which is arranged inside the drying box and is communicated with each air outlet;
[0010] A connecting pipe, which is arranged at the bottom of the drying box. An air outlet cylinder is arranged inside the connecting pipe. A plurality of through holes are provided on the outer wall of the air outlet cylinder, and the air outlet cylinder is connected with an air inlet pipe;
[0011] An air pump, whose air outlet is communicated with the heating box and whose air inlet is located above the connecting pipe, so as to extract the gas inside the connecting pipe and transport it to the heating box;
[0012] And a cooling pipe, one end of which is connected to the bottom of the connecting pipe. A refrigeration pipe is wound around the outside of the cooling pipe, and a coolant is arranged inside the refrigeration pipe.
[0013] Furthermore, the tops of both the drying oven and the outer shell are conical. There is a gap between the outer wall of the drying oven and the inner wall of the outer shell for the material to pass through. Each air outlet is inclined upward in the direction from the inside to the outside of the drying oven.
[0014] Furthermore, the refrigeration pipe is spirally wound around the outside of the cooling pipe, and connecting pipes are provided at both ends of the refrigeration pipe.
[0015] Furthermore, the cooling pipe is inclined, and the lower end of the cooling pipe extends to the outside of the outer shell.
[0016] Furthermore, the coolant is liquid ammonia.
[0017] Furthermore, the outer shell is provided with a feed pipe at the feed inlet. An exhaust pipe is provided on one side of the feed pipe, and the exhaust pipe extends into the interior of the feed pipe.
[0018] Furthermore, heating wires are provided inside the heating box.
[0019] Furthermore, an air suction pipe is provided at the air inlet of the air pump, and the lower end of the air suction pipe is directly above the connecting pipe.
[0020] Furthermore, a guide plate is provided inside the outer shell. The guide plate is located between the drying oven and the connecting pipe. The guide plate is inclined, and the top of the connecting pipe is connected to one side of the guide plate.
[0021] Furthermore, a blower is further included. The air outlet of the blower is connected to the lower end of the air inlet pipe, so that external gas enters the air outlet cylinder through the air inlet pipe. The air outlet cylinder coincides with the axis of the connecting pipe. There is a gap between the outer wall of the air outlet cylinder and the inner wall of the connecting pipe for the material to pass through.
[0022] The beneficial effects of the present utility model are as follows:
[0023] In the drying and cooling equipment for diammonium phosphate production of the present utility model, the air pump causes high-temperature air to be ejected from the air outlets to dry the falling diammonium phosphate particles. And because each air outlet is inclined upward, the hot air flows from bottom to top, so as to comprehensively dry the falling diammonium phosphate particles. The hot air for drying will flow upward and finally be discharged and collected through the exhaust pipe, and the collected gas will be processed by subsequent equipment and then discharged;
[0024] The dried diammonium phosphate particles will fall into the connecting pipe. At this time, the blower makes external cold gas enter the air outlet cylinder to absorb the heat of the diammonium phosphate particles falling into the gap between the air outlet cylinder and the connecting pipe, so as to cool the dried diammonium phosphate particles. And because at this time the air pump extracts the gas inside the connecting pipe through the air suction pipe, the gas that has absorbed heat can be sucked into the heating box, so as to recycle the heat and improve the energy conservation and environmental protection effect of the device;
[0025] The diammonium phosphate particles fall into the inclined cooling pipe, and liquid ammonia spirally surrounds the outer wall of the cooling pipe through the refrigeration pipe to cool the cooling pipe, thereby further cooling the diammonium phosphate particles falling in the cooling pipe and improving the cooling effect on the diammonium phosphate particles. Brief Description of the Drawings
[0026] Figure 1 It is a schematic cross-sectional structure diagram of a drying and cooling device for diammonium phosphate production proposed by the present utility model;
[0027] Figure 2 It is a schematic three-dimensional structure diagram of a drying box of a drying and cooling device for diammonium phosphate production proposed by the present utility model;
[0028] Figure 3 It is a schematic three-dimensional structure diagram of a cooling pipe and a refrigeration pipe of a drying and cooling device for diammonium phosphate production proposed by the present utility model.
[0029] In the figure: 1 housing, 2 drying box, 3 heating box, 4 air outlet, 5 air pump, 6 air suction pipe, 7 connecting pipe, 8 air outlet cylinder, 9 air inlet pipe, 10 cooling pipe, 11 refrigeration pipe, 12 guide plate, 13 electric heating wire, 14 feeding pipe, 15 exhaust pipe. Detailed Description of the Embodiment
[0030] The technical solutions of this patent will be further described in detail below in conjunction with the specific embodiments.
[0031] The embodiments of this patent are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.
[0032] In the description of this patent, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent.
[0033] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.
[0034] Referring to Figures 1 - 3 , a drying and cooling device for diammonium phosphate production, is applied to the drying and cooling process of diammonium phosphate production, aiming to improve production efficiency and reduce costs.
[0035] The drying and cooling device for diammonium phosphate production includes a housing 1, a drying chamber 2, a heating chamber 3, a connecting pipe 7, an air pump 5, a cooling pipe 10, and a blower.
[0036] The top of the housing 1 is provided with a feeding port, and a feeding pipe 14 is arranged at the feeding port. Through the feeding pipe 14, the diammonium phosphate particles formed after spray granulation can be conveyed into the interior of the housing 1. The diammonium phosphate particles will fall onto the drying chamber 2 arranged inside the housing 1. Since the tops of both the drying chamber 2 and the housing 1 are conical, there is a gap between the outer wall of the drying chamber 2 and the inner wall of the housing 1. The diammonium phosphate particles falling onto the drying chamber 2 will fall through the gap between the drying chamber 2 and the housing 1. A plurality of air outlets 4 are horizontally arranged at intervals on the outer wall of the drying chamber 2. Thus, the high-temperature air inside the drying chamber 2 is ejected through the air outlets 4 to dry the falling diammonium phosphate particles. And since each air outlet 4 is inclined upward along the direction from the inside to the outside of the drying chamber 2, the hot air flows upward from bottom to top through the inclined upward air outlets 7, so as to comprehensively dry the falling diammonium phosphate particles. The hot air for drying will finally be discharged and collected through the exhaust pipe 15 arranged on the feeding pipe 14, and the collected gas will be processed by subsequent equipment and then discharged.
[0037] The heating chamber 3 is arranged inside the drying chamber 2. An electric heating wire 13 is arranged inside the heating chamber 3, and the heating chamber 3 is communicated with each air outlet 4. The air outlet of the air pump 5 is communicated with the heating chamber 3. The air inlet of the air pump 5 is provided with a suction pipe 6, and the lower end inlet of the suction pipe 6 is located directly above the connecting pipe 7. The air pump 5 extracts the gas inside the connecting pipe 7 through the suction pipe 5 and transports it to the heating chamber 3 to be heated by the electric heating wire 13. The hot air is ejected through the air outlets 4, thereby drying the diammonium phosphate particles.
[0038] The connecting pipe 7 is arranged at the bottom of the drying oven 2. Inside the outer shell 1, there is a guide plate 12 which is located between the drying oven 2 and the connecting pipe 7. The top of the connecting pipe 7 is connected to one side of the guide plate 12. The guide plate 12 is inclined. The guide plate 12 can collect the diammonium phosphate particles dried by the drying oven 2 and make them fall into the connecting pipe 7. Inside the connecting pipe 7, there is an air outlet cylinder 8. The air outlet cylinder 8 coincides with the axis line of the connecting pipe 7. There are multiple through holes on the outer wall of the air outlet cylinder 8. There is a gap between the outer wall of the air outlet cylinder 8 and the inner wall of the connecting pipe 7. The lower end of the air outlet cylinder 8 is connected to an air inlet pipe 9. The blower is arranged outside the device, and the air outlet of the blower is connected to the lower end of the air inlet pipe 9. Thus, the external cold gas enters the air outlet cylinder 8 through the air inlet pipe 9. Subsequently, the cold gas is ejected through the through holes on the air outlet cylinder 8. The cold gas enters the gap between the air outlet cylinder 8 and the connecting pipe 7 and absorbs the heat of the diammonium phosphate particles falling into the gap between the air outlet cylinder 8 and the connecting pipe 7, thereby cooling the dried diammonium phosphate particles. And because at this time the air pump 5 extracts the internal gas of the connecting pipe 7 through the suction pipe 5, the gas that has absorbed heat can be sucked into the heating box 3, thereby recycling the heat and improving the energy conservation and environmental protection effect of the device.
[0039] One end of the cooling pipe 10 is connected to the bottom of the connecting pipe 7. The refrigeration pipe 11 is spirally wound around the outside of the cooling pipe 10. There is a coolant inside the refrigeration pipe 11. The coolant is liquid ammonia. There are connecting pipes at both ends of the refrigeration pipe 11, through which liquid ammonia can be introduced into the refrigeration pipe 11, so that the liquid ammonia spirally surrounds and passes through the outer wall of the cooling pipe 10 to cool the cooling pipe 10, thereby further cooling the diammonium phosphate particles falling in the connecting pipe 7. Because the cooling pipe 10 is inclined and the lower end of the cooling pipe 10 extends to the outside of the outer shell 1, the diammonium phosphate particles that have been cooled again are discharged and collected.
[0040] The working principle of this drying and cooling equipment for diammonium phosphate production: During use, the diammonium phosphate particles formed after spray granulation treatment are conveyed into the inside of the outer shell 1 through the feeding pipe 14. The diammonium phosphate particles will fall onto the drying oven 2 arranged inside the outer shell 1. The diammonium phosphate particles falling onto the drying oven 2 will fall through the gap between the drying oven 2 and the outer shell 1. At this time, the air pump 5 makes the high-temperature air heated by the heating wire 13 inside the heating box 3 be ejected from the air outlet 4 to dry the falling diammonium phosphate particles. And because each air outlet 4 is inclined upward, the hot air flows from bottom to top, thereby comprehensively drying the falling diammonium phosphate particles. The hot air for drying will flow upward and finally be discharged and collected through the exhaust pipe 15 arranged on the feeding pipe 14, and the collected gas will be processed by subsequent equipment and then discharged;
[0041] The dried diammonium phosphate particles will fall onto the inclined guide plate 12, and thus be collected and fall into the connecting pipe 7, and then fall through the gap between the air outlet cylinder 8 and the connecting pipe 7. At this time, the blower extracts external cold gas, which enters the air outlet cylinder 8 through the air inlet pipe 9. Subsequently, the cold gas is ejected through the through holes on the air outlet cylinder 8. The cold gas enters the gap between the air outlet cylinder 8 and the connecting pipe 7, absorbs the heat of the diammonium phosphate particles falling into the gap between the air outlet cylinder 8 and the connecting pipe 7, thereby cooling the dried diammonium phosphate particles. And because the air pump 5 extracts the internal gas of the connecting pipe 7 through the suction pipe 5 at this time, the gas that has absorbed heat can be sucked into the heating box 3, so as to recycle the heat and improve the energy conservation and environmental protection effect of the device;
[0042] The diammonium phosphate particles that have been cooled once continue to fall into the inclined cooling pipe 10. At this time, liquid ammonia is introduced into the refrigeration pipe 11 through the connecting pipe. The liquid ammonia spirally surrounds the outer wall of the cooling pipe 10 to cool the cooling pipe 10, thereby further cooling the diammonium phosphate particles falling in the cooling pipe 10. The diammonium phosphate particles after being cooled again are discharged and collected by the inclined cooling pipe 10.
[0043] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.
Claims
1. A drying and cooling equipment for diammonium phosphate production, characterized in that: include: A housing (1) having a feed inlet at the top; A drying box (2) is arranged inside the housing (1), and a plurality of air outlets (4) are arranged at intervals in the transverse direction on the outer wall of the drying box (2); A heating box (3), which is arranged inside the drying box (2) and is connected to each of the air outlets (4); A connecting pipe (7) is arranged at the bottom of the drying box (2), an air outlet tube (8) is arranged inside the connecting pipe (7), a plurality of through holes are arranged on the outer wall of the air outlet tube (8), and the air outlet tube (8) is connected to an air inlet pipe (9); An air pump (5), whose air outlet is connected to the heating box (3) and whose air inlet is located above the connecting pipe (7), so as to extract the gas inside the connecting pipe (7) and transport it to the heating box (3); and a cooling pipe (10), one end of which is connected to the bottom of the connecting pipe (7); a refrigeration pipe (11) is arranged around the outside of the cooling pipe (10); and a cooling liquid is arranged inside the refrigeration pipe (11).
2. The drying and cooling equipment for diammonium phosphate production according to claim 1, characterized in that: The top of the drying box (2) and the top of the outer shell (1) are both conical, and a gap is provided between the outer wall of the drying box (2) and the inner wall of the outer shell (1) for the passage of materials, and each of the air outlets (4) is arranged to be inclined upward from the inside to the outside of the drying box (2).
3. The drying and cooling equipment for diammonium phosphate production according to claim 1, characterized in that: The refrigeration pipe (11) is arranged in a spiral shape and surrounds the outside of the cooling pipe (10), and connecting pipes are provided at both ends of the refrigeration pipe (11).
4. The drying and cooling equipment for diammonium phosphate production according to claim 1, characterized in that: The cooling pipe (10) is inclined, and the lower end of the cooling pipe (10) extends to the outside of the outer shell (1).
5. The drying and cooling equipment for diammonium phosphate production according to claim 1, characterized in that: The coolant is liquid ammonia.
6. The drying and cooling equipment for diammonium phosphate production according to claim 1, characterized in that: The housing (1) is provided with a feed pipe (14) at the feed inlet, and an exhaust pipe (15) is provided on one side of the feed pipe (14), and the exhaust pipe (15) extends into the interior of the feed pipe (14).
7. The drying and cooling equipment for diammonium phosphate production according to claim 1, characterized in that: The heating box (3) is provided with a heating wire (13) inside.
8. The drying and cooling equipment for diammonium phosphate production according to claim 1, characterized in that: The air inlet of the air pump (5) is provided with an air suction pipe (6), and the lower end of the air suction pipe (6) is located directly above the connecting pipe (7).
9. The drying and cooling equipment for diammonium phosphate production according to claim 1, characterized in that: A guide plate (12) is provided inside the housing (1), and the guide plate (12) is located between the drying box (2) and the connecting pipe (7). The guide plate (12) is inclined, and the top of the connecting pipe (7) is connected to one side of the guide plate (12).
10. The drying and cooling equipment for diammonium phosphate production according to any one of claims 1 to 9, characterized in that: It also includes a blower, the air outlet of the blower is connected to the lower end of the air inlet pipe (9) so that external air can enter the air outlet tube (8) through the air inlet pipe (9), the air outlet tube (8) and the axis of the connecting tube (7) coincide with each other, and a gap is provided between the outer wall of the air outlet tube (8) and the inner wall of the connecting tube (7) for the passage of materials.