A high-efficiency and energy-saving calcination equipment for regenerated ferric phosphate

Abstract

This application relates to the field of new energy material preparation technology, and in particular to a high-efficiency and energy-saving calcination device for recycled ferric phosphate, comprising a base, a calcination mechanism at the top of the base, and a discharge mechanism at the bottom of the calcination mechanism. This invention utilizes components such as a rotary kiln shell, a heating furnace shell, an electric heating module, and electric heating tubes. Through the annular heating cavity formed between the heating furnace shell and the rotary kiln shell, and the electrical connection between the electric heating module and the electric heating tubes, the electric heating tubes can uniformly heat the calcined material within the rotary kiln shell via heat transfer oil. The heat transfer oil circulates and conducts heat within the annular heating cavity, avoiding uneven local temperatures. This achieves the effect of fully and uniformly calcining the screened recycled ferric phosphate raw material through efficient heat conduction, improving calcination quality and efficiency.

Description

Technical Field

[0001] This application relates to the field of new energy material preparation technology, and in particular to a high-efficiency and energy-saving calcination equipment for regenerated iron phosphate. Background Technology

[0002] Calcination is a crucial step in the production of recycled ferric phosphate, and its efficiency and energy consumption directly impact product quality and production costs. Traditional calcination equipment generally suffers from uneven heat distribution and low material transfer efficiency, leading to incomplete calcination and significant energy waste. Furthermore, in most equipment, the calcination and discharge stages are independent, with dispersed power systems, increasing equipment complexity and reducing overall operational stability. In addition, material residue often remains during discharge, causing raw material waste and making cleaning and maintenance difficult. Therefore, there is an urgent need to develop a highly efficient and energy-saving calcination device that can solve these problems to meet the growing production demands of the recycled ferric phosphate industry.

[0003] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: Existing equipment employs a single auger or independently driven multi-segment transmission structure, resulting in asynchronous transmission between the calcination and discharge sections. This can easily lead to material accumulation at the discharge port, and even over-burning or sticking due to excessive residence time. Rotary furnaces are mostly horizontally arranged, relying solely on the auger to push materials, resulting in high resistance and low transmission efficiency. This is especially problematic for high-viscosity materials, which are prone to stagnation, impacting production capacity. Utility Model Content

[0004] In order to solve the problems mentioned in the background art, this application provides a high-efficiency and energy-saving calcination equipment for regenerated iron phosphate.

[0005] This application provides a high-efficiency and energy-saving calcination equipment for recycled ferric phosphate, which adopts the following technical solution: A high-efficiency and energy-saving calcination equipment for recycled ferric phosphate includes a base, a calcination mechanism is provided on the top of the base, and a discharge mechanism is provided at the bottom of the calcination mechanism;

[0006] The calcination mechanism includes a rotary kiln shell for containing calcined material, a heating furnace shell for heating the rotary kiln shell, a first auger for pushing the calcined material inside the rotary kiln shell, a first driven gear for driving the first auger to rotate, and a driving gear for simultaneously driving the first auger and the second auger to rotate.

[0007] The drive gear is fixedly installed at the output end of the external motor. One side of the drive gear meshes with the first driven gear for transmission. The drive gear, as the transmission core, is driven by the external motor and simultaneously meshes with the first and second driven gears to achieve synchronous transmission of mixing and discharging, simplifying the power system. The other side of the drive gear meshes with the second driven gear for transmission.

[0008] Optionally, the top of the rotary kiln shell is provided with a feed inlet, the top of the heating furnace shell is provided with an electric heating module, and the heating furnace shell is fixedly sleeved on the outside of the rotary kiln shell;

[0009] The heating furnace shell is equipped with evenly distributed electric heating tubes, which are electrically connected to the electric heating module;

[0010] The outer shell of the heating furnace and the outer shell of the rotary kiln form an annular heating cavity, which is filled with heat-conducting oil.

[0011] Optionally, the first auger is movably installed inside the rotary kiln shell. When the first auger is installed inside the rotary kiln, it stirs the material during rotation to ensure uniform heating; at the same time, it pushes the material to move towards the first discharge port to realize the continuity of the calcination process. The first driven gear is coaxially fixedly connected to the end of the first auger.

[0012] Optionally, the discharge mechanism includes a discharge pipe shell fixedly installed at the bottom of the heating furnace shell, a second auger for pushing the calcined material toward the discharge port, and a second driven gear for driving the second auger to rotate.

[0013] The second driven gear is coaxially and fixedly connected to the end of the second auger, and the second auger is movably installed between the discharge pipe shell and the rotary kiln shell;

[0014] The outer shell of the discharge pipe and the outer shell of the rotary kiln together form a cylindrical discharge channel.

[0015] Optionally, the rotary kiln shell has a first discharge port on the side near the first driven gear, and the first discharge port is connected to the interior of the discharge pipe shell.

[0016] Optionally, the central axis of the rotary kiln shell is arranged at an angle of 3°–8° to the horizontal plane, and the first discharge port is located at the lower end of the rotary kiln shell.

[0017] Optionally, a second discharge port is provided at the bottom of the discharge pipe shell, and the spiral blades of the second auger extend to below the second discharge port.

[0018] In summary, this application includes the following beneficial technical effects:

[0019] 1. This utility model, by incorporating components such as a rotary kiln shell, a heating furnace shell, an electric heating module, and electric heating tubes, utilizes the annular heating cavity formed between the heating furnace shell and the rotary kiln shell, and the electrical connection between the electric heating module and the electric heating tubes, to enable the electric heating tubes to uniformly heat the calcined material within the rotary kiln shell via heat transfer oil. The heat transfer oil circulates and conducts heat within the annular heating cavity, avoiding the problem of uneven local temperatures. This achieves the effect of enabling the device to fully and uniformly calcine the screened recycled iron phosphate raw material through efficient heat conduction, improving calcination quality and efficiency.

[0020] 2. This utility model, by incorporating components such as a first auger, a first driven gear, and a driving gear, utilizes the meshing transmission relationship between the driving gear and the first driven gear to enable the first auger to stir and propel the calcined material within the rotary kiln shell through rotation. The driving gear, driven by an external motor, simultaneously rotates the first auger, further promoting material movement and mixing as the material naturally moves downwards due to the rotary kiln's tilt angle. This achieves the effect of fully stirring and orderly conveying the screened recycled ferric phosphate raw material through mechanical stirring and gravity assistance, ensuring the material's residence time and processing uniformity within the furnace. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0022] Figure 2 This is a partial structural diagram of an embodiment of this application;

[0023] Figure 3 This is a partial structural diagram of the calcination mechanism in an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the partial structure installation of the calcination mechanism in an embodiment of this application;

[0025] Reference numerals: 1. Base; 2. Calcination mechanism; 201. Rotary furnace shell; 202. Feed inlet; 203. Heating furnace shell; 204. Electric heating module; 205. Electric heating tube; 206. First discharge port; 207. First auger; 208. First driven gear; 209. Driven gear; 3. Discharge mechanism; 301. Second driven gear; 302. Second auger; 303. Discharge pipe shell. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0027] This application discloses a high-efficiency and energy-saving calcination equipment for regenerated iron phosphate.

[0028] Please see Figure 1 A high-efficiency and energy-saving calcination device for recycled ferric phosphate includes a base 1, which provides stable support for the entire device, enabling the calcination mechanism 2 to operate stably. A discharge mechanism 3 connects to the calcination process, ensuring smooth discharge of calcined material and guaranteeing continuous operation of the equipment. The calcination mechanism 2 is located at the top of the base 1, and the discharge mechanism 3 is located at the bottom of the calcination mechanism 2. The discharge mechanism 3 includes a discharge pipe shell 303 fixedly installed at the bottom of the heating furnace shell 203, a second auger 302 for pushing the calcined material towards the discharge port, and a second driven gear 301 for driving the second auger 302 to rotate. The discharge pipe shell 303 is connected to the bottom of the heating furnace. The second auger 302 pushes the calcined material towards the discharge port, and the second driven gear 301 drives the auger to rotate, ensuring a smooth and orderly discharge process that is seamlessly connected to the calcination process.

[0029] Please see Figures 2 to 4 The calcination mechanism 2 includes a rotary kiln shell 201 for containing the calcined material, a heating furnace shell 203 for heating the rotary kiln shell 201, a first auger 207 for pushing the calcined material inside the rotary kiln shell 201, a first driven gear 208 for driving the first auger 207 to rotate, and a drive gear 209 for simultaneously driving the first auger 207 and the second auger 302 to rotate. The drive gear 209 is fixedly installed at the output end of an external motor. One side of the drive gear 209 meshes with the first driven gear 208, and the other side of the drive gear 209 meshes with the second driven gear 301. The rotary kiln shell 201 carries the calcined material, the heating furnace shell 203 provides the heating environment, and the first auger 207 continuously pushes the material. The gear transmission system realizes power sharing, making the power transmission of calcination and discharge more efficient and coordinated.

[0030] The drive gear 209 is driven by an external motor. Through meshing transmission on both sides, it synchronously drives the first driven gear 208 and the second driven gear 301, so that the material pushing in the calcination mechanism 2 and the material transmission in the discharge mechanism 3 are consistent, ensuring the synchronous and stable production process.

[0031] The top of the rotary kiln shell 201 is provided with a feed inlet 202, and the top of the heating furnace shell 203 is provided with an electric heating module 204. The heating furnace shell 203 is fixedly sleeved on the outside of the rotary kiln shell 201. The feed inlet 202 facilitates the feeding of calcined material, and the electric heating module 204 provides energy for heating. The heating furnace shell 203 is sleeved on the rotary kiln shell 201 to form a closed heating space, which reduces heat loss and improves heating efficiency and stability.

[0032] The heating furnace shell 203 is equipped with evenly distributed electric heating tubes 205, which are electrically connected to the electric heating module 204. The electric heating tubes 205 are evenly distributed inside the heating furnace shell 203. When energized, they generate heat and work with the electric heating module 204 to make the temperature distribution in the heating area more uniform, ensuring that the calcined material is heated evenly and improving the calcination quality.

[0033] An annular heating chamber is formed between the heating furnace shell 203 and the rotary kiln shell 201, and this annular heating chamber is filled with heat-conducting oil. The annular heating chamber is filled with heat-conducting oil, and by utilizing the good thermal conductivity of the heat-conducting oil, the heat generated by the electric heating tube 205 is quickly and evenly transferred to the rotary kiln shell 201, so that the calcination temperature is more precisely controlled and energy consumption is reduced.

[0034] The first auger 207 is movably installed inside the rotary kiln shell 201, and the first driven gear 208 is coaxially fixedly connected to the end of the first auger 207. The first auger 207 rotates inside the rotary kiln, continuously pushing the calcined material to move, preventing material accumulation, and causing the material to be constantly turned over during the calcination process, fully contacting the heat, and improving calcination efficiency and uniformity.

[0035] Please see Figures 3 to 4 The second driven gear 301 is coaxially fixedly connected to the end of the second auger 302, which is movably installed between the discharge pipe housing 303 and the rotary kiln housing 201. The coaxial connection between the second driven gear 301 and the second auger 302 ensures direct and efficient power transmission. The auger rotates between the discharge pipe and the rotary kiln, promptly discharging the calcined material and preventing material stagnation from affecting production. The discharge pipe housing 303 and the rotary kiln housing 201 together form a cylindrical discharge channel. The smooth interior of the cylindrical discharge channel reduces material conveying resistance, allowing the material to move smoothly under the push of the second auger 302, ensuring a stable and efficient discharge process and improving the overall operating efficiency of the equipment.

[0036] The rotary kiln shell 201 has a first discharge port 206 on the side near the first driven gear 208, and the first discharge port 206 is connected to the interior of the discharge pipe shell 303. The first discharge port 206 connects the rotary kiln and the discharge pipe. The calcined material enters the discharge channel through this port. The channel connection is smooth, ensuring that the material transitions without obstruction, so that the calcination and discharge processes are closely coordinated, improving production continuity.

[0037] The central axis of the rotary kiln shell 201 is inclined at an angle of 3°–8° to the horizontal plane, and the first discharge port 206 is located at the lower end of the rotary kiln shell 201. The inclined arrangement of the rotary kiln shell 201 utilizes gravity to assist the material in moving towards the first discharge port 206 at the lower end, reducing the pushing load of the first auger 207, allowing the material to move naturally in the discharge direction during the calcination process, and improving the overall material transfer efficiency.

[0038] A second discharge port is provided at the bottom of the discharge pipe housing 303, and the spiral blades of the second auger 302 extend below the second discharge port. The second discharge port is located at the bottom of the discharge pipe housing 303 to facilitate material discharge. The spiral blades of the second auger 302 extend below it to completely push the material to the outlet, avoiding residue, ensuring clean discharge, and improving material utilization and equipment cleanliness.

[0039] Example

[0040] Large-scale industrial production of recycled iron phosphate

[0041] This calcination equipment plays a crucial role in the large-scale industrial production of recycled ferric phosphate. First, operators must perform a pre-start inspection to ensure that the base 1 is securely installed in the designated location in the production workshop, providing stable support for the entire equipment. Next, it is confirmed that all components of the calcination mechanism 2 and the discharge mechanism 3 are properly connected, such as the heating furnace shell 203 being securely fitted onto the outside of the rotary kiln shell 201 without any looseness, and the discharge pipe shell 303 being tightly connected to the rotary kiln shell 201.

[0042] Once ready, the calcined recycled ferric phosphate is continuously fed into the rotary kiln shell 201 through the feed inlet 202 at the top of the shell. At this time, the external motor is started, and its output drives the drive gear 209 to rotate. Since the drive gear 209 meshes with the first driven gear 208 on one side and with the second driven gear 301 on the other, the first driven gear 208 drives the first auger 207 to rotate inside the rotary kiln shell 201, and the second driven gear 301 drives the second auger 302 to rotate between the discharge pipe shell 303 and the rotary kiln shell 201.

[0043] Subsequently, the electric heating module 204 on the top of the heating furnace shell 203 is turned on, and the electric heating module 204 controls the electric heating tubes 205 evenly distributed inside the heating furnace shell 203 to be energized and heated. The heat generated by the electric heating tubes 205 is transferred to the annular heating cavity between the heating furnace shell 203 and the rotary kiln shell 201. The heat-conducting oil filled in the cavity evenly conducts the heat to the rotary kiln shell 201, heating and calcining the calcined material inside.

[0044] Because the central axis of the rotary kiln shell 201 is inclined at an angle of 3°-8° to the horizontal plane, and the first discharge port 206 is located at the lower end of the rotary kiln shell 201, during the rotation of the first auger 207 pushing the calcined material, the calcined material is not only stirred to ensure uniform heating, but also gradually moves towards the first discharge port 206 due to the inclination angle and the pushing action of the auger. After calcination is completed, the material enters the interior of the discharge pipe shell 303 through the first discharge port 206, forming a cylindrical discharge channel together with the rotary kiln shell 201. At this time, the spiral blades of the second auger 302 push the calcined material towards the second discharge port at the bottom of the discharge pipe shell 303 until the material is discharged from the second discharge port, completing the entire large-scale calcination production process.

[0045] The implementation principle of a high-efficiency and energy-saving calcination device for regenerated ferric phosphate in this application is as follows:

[0046] First, the material enters the equipment through the feed inlet 202 at the top of the rotary kiln shell 201. At this time, the electric heating module 204 at the top of the heating furnace shell 203 is activated. After being energized with the evenly distributed electric heating tubes 205 inside, it begins to generate heat. The heat is transferred to the heat transfer oil filled in the annular heating cavity between the heating furnace shell 203 and the rotary kiln shell 201. After being heated, the heat transfer oil is heated evenly, thereby preheating the material in the rotary kiln shell 201 in preparation for subsequent calcination.

[0047] Secondly, since the central axis of the rotary kiln shell 201 is arranged at an angle of 3°–8° to the horizontal plane, and the first discharge port 206 is located at the lower end, the external motor drives the drive gear 209 to rotate. The drive gear 209 meshes with the first driven gear 208, so that the first auger 207 rotates inside the rotary kiln shell 201. While rotating, the first auger 207 pushes the material from the higher end to the first discharge port 206 at the lower end. During the material movement, the rotary kiln shell 201 is uniformly heated by the heat transfer oil, and the material comes into full contact with the rotary kiln shell 201 to complete the calcination reaction.

[0048] Next, when the material is pushed by the first auger 207 to the first discharge port 206 at the lower end of the rotary kiln shell 201, the material enters the cylindrical discharge channel formed by the discharge pipe shell 303 and the rotary kiln shell 201 through the first discharge port 206, and thus enters the discharge mechanism 3.

[0049] Next, when the drive gear 209 rotates, its other side meshes with the second driven gear 301, thereby driving the second auger 302 to rotate between the discharge pipe shell 303 and the rotary kiln shell 201. When the second auger 302 rotates, it pushes the calcined material in the discharge channel toward the second discharge port at the bottom of the discharge pipe shell 303. Since the spiral blades of the second auger 302 extend to below the second discharge port, it can ensure that the material moves smoothly and completely toward the second discharge port.

[0050] Finally, the material is pushed by the second auger 302 to the second discharge port at the bottom of the discharge pipe shell 303 and discharged from the second discharge port, completing the entire calcination and discharge process. During the entire operation, the heat transfer oil in the annular heating chamber can transfer heat evenly, reducing heat loss. The electric heating module 204 can precisely control the temperature and improve energy utilization efficiency. At the same time, the drive gear 209 drives the first auger 207 and the second auger 302 to rotate, reducing the number of power equipment and achieving high efficiency and energy saving.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency energy-saving calcination device for regenerating iron phosphate, comprising a base (1), characterized in that: The base (1) is provided with a calcination mechanism (2) at the top and a discharge mechanism (3) at the bottom of the calcination mechanism (2); The calcination mechanism (2) includes a rotary kiln shell (201) for containing calcined material, a heating furnace shell (203) for heating the rotary kiln shell (201), a first auger (207) for pushing the calcined material inside the rotary kiln shell (201), a first driven gear (208) for driving the first auger (207) to rotate, and a driving gear (209) for simultaneously driving the first auger (207) and the second auger (302) to rotate. The drive gear (209) is fixedly installed at the output end of the external motor. One side of the drive gear (209) meshes with the first driven gear (208) for transmission, and the other side of the drive gear (209) meshes with the second driven gear (301) for transmission.

2. The efficient and energy-saving calcination apparatus for regenerative iron phosphate according to claim 1, characterized in that: The rotary kiln shell (201) has a feed inlet (202) at its top, and the heating furnace shell (203) has an electric heating module (204) at its top. The heating furnace shell (203) is fixedly sleeved on the outside of the rotary kiln shell (201). Electric heating tubes (205) are evenly distributed inside the heating furnace shell (203), and the electric heating tubes (205) are electrically connected to the electric heating module (204). The heating furnace shell (203) and the rotary kiln shell (201) form an annular heating cavity, and the annular heating cavity is filled with heat-conducting oil.

3. The efficient and energy-saving calcination apparatus for regenerative iron phosphate according to claim 1, characterized in that: The first auger (207) is movably installed inside the rotary kiln shell (201), and the first driven gear (208) is coaxially fixedly connected to the end of the first auger (207).

4. The efficient and energy-saving calcination apparatus for regenerative iron phosphate according to claim 1, characterized in that: The discharge mechanism (3) includes a discharge pipe shell (303) fixedly installed at the bottom of the heating furnace shell (203), a second auger (302) for pushing the calcined material to move towards the discharge port, and a second driven gear (301) for driving the second auger (302) to rotate; the second driven gear (301) is coaxially fixedly connected to the end of the second auger (302), and the second auger (302) is movably installed between the discharge pipe shell (303) and the rotary kiln shell (201); the discharge pipe shell (303) and the rotary kiln shell (201) together form a cylindrical discharge channel.

5. The efficient and energy-saving calcination apparatus for regenerative iron phosphate according to claim 1, characterized in that: The rotary kiln shell (201) has a first discharge port (206) on the side near the first driven gear (208), and the first discharge port (206) is connected to the interior of the discharge pipe shell (303).

6. The efficient and energy-saving calcination apparatus for regenerative iron phosphate according to claim 1, characterized in that: The central axis of the rotary kiln shell (201) is arranged at an angle of 3°–8° to the horizontal plane, and the first discharge port (206) is located at the lower end of the rotary kiln shell (201).

7. The efficient and energy-saving calcination apparatus for regenerative iron phosphate according to claim 4, characterized in that: The bottom of the discharge pipe housing (303) is provided with a second discharge port, and the spiral blades of the second auger (302) extend to below the second discharge port.

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