Sintering equipment based on treatment of Fenton process sludge

Abstract

The utility model relates to the technical field of iron phosphate sintering, and provides sintering equipment based on Fenton process sludge treatment, which comprises a treatment cylinder, a plurality of supporting legs are fixedly connected to the bottom end of the treatment cylinder, a heat exchange pipe is arranged in the middle of the treatment cylinder, the heat exchange pipe is connected through an external heat exchanger, and the external heat exchanger is connected with the treatment cylinder. Four sintering cylinders which are uniformly distributed are vertically inserted into the processing cylinder, a blanking mechanism is arranged in each sintering cylinder, a plurality of circles of electric heating pipes are arranged at the lower part of the processing cylinder, and the sintering temperature output of the electric heating pipes to regional positions is 500-1000 DEG C. According to the device, the function of heating the interior of the treatment barrel is achieved through the electric heating pipe, waste heat is absorbed through the heat exchange pipe, the temperature is kept, crystal water, a small amount of free water and impurity sulfur elements in iron phosphate can be removed, meanwhile, transformation of an iron phosphate crystal structure can be achieved, and the device is suitable for different application scenes.

Description

Technical Field

[0001] This utility model relates to the field of ferric phosphate sintering technology, and in particular to a sintering device based on the treatment of Fenton process sludge. Background Technology

[0002] Currently, the Fenton reaction is a relatively common method for treating wastewater containing recalcitrant organic matter. However, due to the addition of ferrous ions, the sludge produced after wastewater treatment contains approximately 55%–75% ferric hydroxide, and this sludge is primarily treated as solid waste, leading to a significant waste of iron resources. Lithium iron phosphate (LFP) is a lithium-ion battery cathode material with advantages such as high energy density, long cycle life, and good safety performance. In recent years, with the development of new energy vehicles and energy storage industries, the market demand for LFP batteries has gradually increased. As an important raw material for the preparation of LFP, the demand for iron phosphate will continue to rise. Therefore, recycling iron resources for the preparation of LFP is a feasible resource utilization method.

[0003] The iron phosphate produced from the Fenton process sludge treatment contains water of crystallization and a small amount of free water after washing, making it unsuitable as a raw material for the direct preparation of lithium iron phosphate. To address these issues, a sintering device based on the treatment of Fenton process sludge is proposed. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that the iron phosphate produced from the treatment of Fenton process sludge contains water of crystallization and a small amount of free water after washing, making it unsuitable as a raw material for the preparation of lithium iron phosphate.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a sintering device for treating Fenton process sludge, comprising a treatment cylinder, with multiple support legs fixedly connected to the bottom end of the treatment cylinder, a heat exchange tube arranged in the middle of the treatment cylinder, the heat exchange tube being connected via an external heat exchanger, the lower end of the heat exchange tube being an input port, and the upper end being an output port, the treatment cylinder being divided into a cooling storage chamber and a sintering chamber by a partition plate, four evenly distributed sintering cylinders vertically inserted inside the treatment cylinder, a feeding mechanism being arranged inside the sintering cylinder, and an input mechanism being arranged at the top of the treatment cylinder. The device is interconnected with each sintering cylinder. A partition plate is fixedly connected to the lower end of the processing cylinder. Multiple coils of electric heating tubes are arranged at the lower part of the processing cylinder. The electric heating tubes output a sintering temperature of 500℃-1000℃ for the corresponding area. The electric heating tubes heat the inside of the processing cylinder. The heat exchange tubes absorb the residual heat and maintain the temperature. The device of this application allows the crystal water and a small amount of free water in the iron phosphate to evaporate, and can remove the impurity sulfur element, ensuring its excellent performance. At the same time, it can realize the transformation of the iron phosphate crystal structure, making it suitable for different application scenarios.

[0006] In a preferred embodiment, the bottom of the processing cylinder and the dividing plate are both funnel-shaped. A discharge pipe is connected to the bottom of the processing cylinder, and a switch valve is installed inside the discharge pipe. The funnel shape of the bottom of the processing cylinder and the dividing plate can collect materials, and the valve inside the discharge pipe can output the sintered materials.

[0007] In a preferred embodiment, the input mechanism includes a support column fixedly connected to the top of the processing cylinder. A wide-mouth ring is fixedly connected to the top of the support column. The wide-mouth ring has four evenly distributed through holes. A conveying pipe is fixedly connected to the lower end of each through hole. The other end of the conveying pipe is connected to the sintering cylinder. External materials are received through the wide-mouth ring, and the materials are transferred through the conveying pipe.

[0008] In a preferred embodiment, the feeding mechanism includes a spiral feeding rod rotatably connected inside the sintering cylinder, and a rotating shaft rotatably connected to the middle of the top of the processing cylinder. The spiral feeding rod is drivenly connected to the rotating shaft. By setting the spiral feeding rod to output material into the processing cylinder, the iron phosphate powder that has agglomerated during heating can be broken up and transported by the action of the spiral feeding rod, thereby making the sintering feeding of iron phosphate powder smoother.

[0009] In a preferred embodiment, a pusher ring is rotatably connected to the wide-mouth ring along its outer circumference. The rotating shaft is fixedly connected to the pusher ring, and the rotation of the rotating shaft drives the rotation of the pusher ring, thereby sweeping the material inside the wide-mouth ring into the sintering cylinder.

[0010] In a preferred embodiment, the top end of the spiral feed rod passes through the sintering cylinder, and a driven gear is fixedly connected to the through end. A driving gear is fixedly sleeved on the shaft corresponding to the driven gear. The driving gear is meshed with multiple driven gears for transmission. The function of synchronously driving multiple spiral feed rods can be realized by rotating the shaft in conjunction with the driven gears.

[0011] In a preferred embodiment, a drive motor is fixedly installed on the upper outer wall of the processing cylinder, a main pulley is fixedly connected to the output end of the drive motor, an auxiliary pulley is fixedly connected to the outer circumference of the rotating shaft, and a belt is sleeved between the auxiliary pulley and the main pulley for transmission. The drive motor is used as the drive, and the output of the drive motor can transmit rotation to the rotating shaft through the cooperation of the main pulley, the auxiliary pulley and the belt.

[0012] In a preferred embodiment, a pressure relief pipe is provided on the top side wall of the sintering cylinder, and the pressure relief pipe is connected to an external pipeline to prevent excessive pressure from the steam inside the sintering cylinder during the sintering process, which would affect the normal operation of the device.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. This utility model uses an electric heating tube to heat the inside of the processing cylinder and a heat exchange tube to absorb residual heat and maintain the temperature. The device of this application allows the ferric phosphate containing water of crystallization and a small amount of free water to evaporate, and can remove the impurity sulfur element, ensuring its excellent performance. At the same time, it can realize the transformation of the ferric phosphate crystal structure, making it suitable for different application scenarios.

[0015] 2. This utility model can simultaneously output and feed materials by using a drive motor and a rotating shaft, and can break up and transport ferric phosphate powder that has agglomerated during heating, thereby making the sintering and feeding of ferric phosphate powder smoother. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of a sintering device for treating Fenton process sludge provided by this utility model;

[0017] Figure 2 A schematic diagram of the internal structure of a sintering device for treating Fenton process sludge provided by this utility model;

[0018] Figure 3 A front view of a sintering device for treating Fenton process sludge provided by this utility model;

[0019] Figure 4 A partial structural schematic diagram of a sintering device for treating Fenton process sludge provided by this utility model;

[0020] Figure 5 This utility model provides an internal view of the sintering cylinder of a sintering device for treating Fenton process sludge.

[0021] Legend:

[0022] 1. Processing cylinder; 101. Sintering chamber; 102. Cooling and temporary storage chamber; 2. Wide-mouth ring; 3. Support column; 4. Pushing ring; 5. Through hole; 6. Drive motor; 7. Support leg; 8. Discharge pipe; 9. Heat exchange tube; 10. Sintering cylinder; 11. Dividing plate; 12. Spiral feed rod; 13. Conveying pipe; 14. Pressure relief pipe; 15. Driven gear; 16. Drive gear; 17. Rotating shaft; 18. Main pulley; 19. Auxiliary pulley; 20. Belt; 21. Electric heating tube. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a technical solution: a sintering device for treating Fenton process sludge, including a treatment cylinder 1, with multiple support legs 7 fixedly connected to the bottom end of the treatment cylinder 1, a heat exchange tube 9 arranged in the middle of the treatment cylinder 1, the heat exchange tube 9 being connected through an external heat exchanger, the lower end of the heat exchange tube 9 being the input port, and the upper end being the output port, the treatment cylinder 1 being divided into a sintering chamber 101 and a cooling temporary storage chamber 102 by a partition plate 11, four evenly distributed sintering cylinders 10 being vertically inserted inside the treatment cylinder 1, a feeding mechanism being arranged inside the sintering cylinder 10, and an input mechanism being arranged at the top of the treatment cylinder 1 to connect with each sintering cylinder. The sintering cylinders 10 are interconnected and cooperate with each other. The lower end of the processing cylinder 1 is fixedly connected to the partition plate 11. The lower part of the processing cylinder 1 is provided with multiple coils of electric heating tubes 21. The electric heating tubes 21 output a sintering temperature of 500℃-1000℃ for the area. The electric heating tubes 21 realize the function of heating the inside of the processing cylinder 1. The residual heat is absorbed by the heat exchange tubes 9 and the temperature is maintained. The device of this application allows the crystal water and a small amount of free water in the iron phosphate to evaporate, and can remove the impurity sulfur element, ensuring its excellent performance. At the same time, it can realize the transformation of the iron phosphate crystal structure, making it suitable for different application scenarios.

[0025] like Figure 1-5 As shown, the bottom of the processing cylinder 1 and the dividing plate 11 are both funnel-shaped. The bottom of the processing cylinder 1 is connected to a discharge pipe 8, and a switch valve is installed inside the discharge pipe 8. The funnel shape of the bottom of the processing cylinder 1 and the dividing plate 11 can play the role of collecting materials. The valve installed inside the discharge pipe 8 can realize the function of outputting the sintered materials.

[0026] like Figure 1-5 As shown, the input mechanism includes a support column 3 fixedly connected to the top of the processing cylinder 1. A wide-mouth ring 2 is fixedly connected to the top of the support column 3. Four evenly distributed through holes 5 are opened on the wide-mouth ring 2. A conveying pipe 13 is fixedly connected to the lower end of each through hole 5. The other end of the conveying pipe 13 is connected to the sintering cylinder 10. The material is received from the outside through the wide-mouth ring 2 and transferred through the conveying pipe 13.

[0027] like Figure 1-5As shown, the feeding mechanism includes a spiral feeding rod 12 rotatably connected inside the sintering cylinder 10. A rotating shaft 17 is rotatably connected to the top and middle of the processing cylinder 1. The spiral feeding rod 12 is connected to the rotating shaft 17 for transmission. By setting the spiral feeding rod 12, materials are output into the processing cylinder 1. The iron phosphate powder that has agglomerated due to heating can be broken up and transported under the action of the spiral feeding rod 12, thereby making the sintering feeding of iron phosphate powder smoother.

[0028] like Figure 1-5 As shown, a pusher ring 4 is rotatably connected to the outer circumference of the wide-mouth ring 2. The rotating shaft 17 is fixedly connected to the pusher ring 4. The rotation of the rotating shaft 17 drives the rotation of the pusher ring 4, thereby sweeping the material in the wide-mouth ring 2 into the sintering cylinder 10.

[0029] like Figure 1-5 As shown, the top end of the spiral feed rod 12 passes through the sintering cylinder 10, and a driven gear 15 is fixedly connected to the through end. The rotating shaft 17 is fixedly sleeved with a driving gear 16 corresponding to the driven gear 15. The driving gear 16 is meshed with multiple driven gears 15 for transmission. The function of synchronously driving multiple spiral feed rods 12 can be realized by rotating the rotating shaft 17 in coordination with the driven gears 15.

[0030] like Figure 1-5 As shown, a drive motor 6 is fixedly installed on the upper outer wall of the processing cylinder 1. A main pulley 19 is fixedly connected to the output end of the drive motor 6. An auxiliary pulley 18 is fixedly connected to the outer circumference of the rotating shaft 17. A belt 20 is sleeved between the auxiliary pulley 18 and the main pulley 19 for transmission. The drive motor 6 is used as the drive, and the output of the drive motor 6 can transmit the rotation to the rotating shaft 17 through the cooperation of the main pulley 19, the auxiliary pulley 18 and the belt 20.

[0031] like Figure 1-5 As shown, a pressure relief pipe 14 is provided on the top side wall of the sintering cylinder 10. The pressure relief pipe 14 is connected to an external pipeline to prevent excessive pressure from the steam inside the sintering cylinder 10 during the sintering process, which would affect the normal operation of the device.

[0032] Working principle: During the sintering process, the washed material is fed into the wide-mouth ring 2, and then fed into the sintering cylinder 10 through the rotating shaft 17 in conjunction with the pusher ring 4 and the conveying pipe 13. The material is then output downwards through the screw feeder 12. The lower part of the processing cylinder 1 is heated to a high-temperature zone of about 900℃ through the electric heating tube 21. The heat exchange tube 9 of the processing cylinder 1 can control the temperature of the upper part of the processing cylinder 1 at about 220℃ by inputting low-temperature steam. When the iron phosphate powder reaches the upper part of the processing cylinder 1, the moisture in the iron phosphate powder can be removed. When the iron phosphate powder reaches the high-temperature zone, it can form hexagonal iron phosphate crystals. After the iron phosphate is sintered at high temperature, it can be fed into the cooling storage chamber 102 through the separator 11 for temporary storage. This device recovers the excess heat in the high-temperature zone through the heat exchange tube 9, which can be used for other processing energy use. While reducing the influence of the high-temperature zone on the low-temperature zone temperature, it also further improves energy conservation and reduces production costs.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A sintering device for treating Fenton process sludge, comprising a treatment cylinder (1), wherein a plurality of support legs (7) are fixedly connected to the bottom end of the treatment cylinder (1), characterized in that, A heat exchange tube (9) is provided in the middle of the processing cylinder (1). The heat exchange tube (9) is connected through an external heat exchanger. The lower end of the heat exchange tube (9) is the input port, and the upper end is the output port. The processing cylinder (1) is divided into a sintering chamber (101) and a cooling storage chamber (102) by a partition plate (11). Four evenly distributed sintering cylinders (10) are vertically inserted in the processing cylinder (1). A feeding mechanism is provided in the sintering cylinder (10). An input mechanism is provided at the top of the processing cylinder (1) and communicates with each sintering cylinder (10). A partition plate (11) is fixedly connected to the lower end of the processing cylinder (1). A multi-turn electric heating tube (21) is provided at the lower part of the processing cylinder (1). The electric heating tube (21) outputs a sintering temperature of 500℃-1000℃ for the area.

2. The sintering equipment based on the treatment of Fenton process sludge according to claim 1, characterized in that: The bottom of the processing cylinder (1) and the dividing plate (11) are both funnel-shaped. The bottom end of the processing cylinder (1) is connected to a discharge pipe (8), and a switch valve is installed inside the discharge pipe (8).

3. A sintering device based on the treatment of Fenton process sludge according to claim 1, characterized in that: The input mechanism includes a support column (3) fixedly connected to the top of the processing cylinder (1). A wide-mouth ring (2) is fixedly connected to the top of the support column (3). Four evenly distributed through holes (5) are opened on the wide-mouth ring (2). A material conveying pipe (13) is fixedly connected to the lower end of each through hole (5). The other end of the material conveying pipe (13) is connected to the sintering cylinder (10).

4. A sintering device based on the treatment of Fenton process sludge according to claim 3, characterized in that: The feeding mechanism includes a spiral feeding rod (12) rotatably connected inside the sintering cylinder (10), and a rotating shaft (17) rotatably connected to the middle of the top end of the processing cylinder (1). The spiral feeding rod (12) and the rotating shaft (17) are connected in a transmission connection.

5. A sintering device based on the treatment of Fenton process sludge according to claim 4, characterized in that: The wide-mouth ring (2) is rotatably connected to the outer circumference of the inner edge of the ring (4), and the rotating shaft (17) is fixedly connected to the pusher ring (4).

6. A sintering device based on the treatment of Fenton process sludge according to claim 5, characterized in that: The top end of the spiral feed rod (12) passes through the sintering cylinder (10), and a driven gear (15) is fixedly connected to the through end. The rotating shaft (17) is fixedly fitted with a driving gear (16) at the location corresponding to the driven gear (15). The driving gear (16) is meshed with and connected to multiple driven gears (15).

7. A sintering device based on the treatment of Fenton process sludge according to claim 6, characterized in that: A drive motor (6) is fixedly installed on the upper outer wall of the processing cylinder (1). A main pulley (19) is fixedly connected to the output end of the drive motor (6). A secondary pulley (18) is fixedly connected to the outer circumference of the rotating shaft (17). A belt (20) is sleeved between the secondary pulley (18) and the main pulley (19) for transmission connection.

8. A sintering device based on the treatment of Fenton process sludge according to claim 1, characterized in that: The top side wall of the sintering cylinder (10) is provided with a pressure relief pipe (14), which is connected to an external pipeline.

Images