Ammonium sulfate drying system based on vibrated fluidized bed
By introducing a cleaning brush to unblock the air holes, increasing the contact time between hot air and ammonium sulfide and recycling hot air, the problems of fluidized bed plate blockage and low thermal energy utilization are solved, and the effects of efficient drying and material saving are achieved.
Patent Information
- Application Number
- CN202422726908.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-11-08
AI Technical Summary
When using a vibrating fluidized bed to dry ammonium sulfide, the pores in the fluidized bed plate are easily blocked by small particles, the heat exchange effect of ammonium sulfide and hot gas is poor, the thermal energy utilization rate is low, and there are more materials entrained in the exhausted gas, resulting in pollution and waste of materials.
A vibrating fluidized bed-based ammonium sulfide drying system is designed, including screw conveyor, cleaning brush, fluidized bed plate, hot gas pipe, jet pipe, gas-solid separator and other components. By cleaning brushes, the blocked air holes are cleared, the contact time between hot gas and ammonium sulfide is increased, and the spiral blades are used to form a cyclone to improve the drying effect. The entrained materials are separated by gas-solid separator, and hot gas is recycled to reduce material waste.
It has achieved effective clearance of blockage, improved drying effect, reduced material waste, improved heat energy utilization, avoided environmental pollution, and had significant economic and social value.
Smart Images
Figure CN223138206U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ammonium sulfate drying, in particular to an ammonium sulfate drying system based on a vibrating fluidized bed. Background Art
[0002] The ammonia desulfurization process has received more and more extensive attention due to its high desulfurization efficiency, simple process, high economic value of by-products, etc. Ammonia desulfurization uses industrial synthetic ammonia as raw material. The ammonium sulfate slurry that has absorbed sulfur dioxide is pumped into a hydrocyclone by a pump and then enters a centrifuge for separation in sequence, and becomes qualified ammonium sulfate fertilizer after being dried by a drying device. Most of the drying of ammonium sulfate in China uses a vibrating fluidized bed dryer. This dryer is a new type of high-efficiency fluidized drying equipment suitable for drying granular and powdery materials. It is a new type of equipment that has gradually developed and expanded its application in recent years, and is increasingly becoming the main model in drying equipment. It is a new drying device that applies a vibration source with specific requirements to an ordinary fluidized bed dryer.
[0003] At present, when using a vibrating fluidized bed to dry ammonium sulfate, the following problems still exist: First, the air holes in the fluidized bed plate are easily blocked by small particles, affecting the drying effect and being unfavorable for the drying of ammonium sulfate; second, the heat exchange effect between ammonium sulfate and hot gas is not good, the thermal energy utilization rate is not high, and the drying effect is not good; third, there is more material entrained in the discharged gas, which will not only cause pollution but also lead to waste of materials. Therefore, it is objectively necessary to develop and manufacture an ammonium sulfate drying system based on a vibrating fluidized bed that can dredge blockages, has good drying effect, and less material waste. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an ammonium sulfate drying system based on a vibrating fluidized bed that can dredge blockages, has good drying effect, and less material waste.
[0005] The purpose of the utility model is realized as follows. It includes an upper shell, a lower shell, and a vibrator arranged on the outer wall of the lower shell. A screw conveyor is arranged above the upper shell. There are multiple discharge ports at the bottom of the screw conveyor. Each discharge port is communicated with the top of the upper shell through a feeding pipe. A cylinder is installed on the upper shell near the feeding pipe. After the piston rod of the cylinder extends into the upper shell, a motor is arranged. A cross bar is arranged on the output shaft of the motor. A cleaning brush is arranged on the lower surface of the cross bar. A fluidized bed plate with air holes is arranged in the upper shell below the cleaning brush. An exhaust port is arranged at the upper part of the upper shell. Multiple end-sealed hot gas pipes are arranged side by side at the lower part of the lower shell. A jet pipe is evenly arranged at the top of each hot gas pipe. A vertical shaft is arranged in the jet pipe. A spiral blade is arranged on the vertical shaft. An air-solid separator is arranged on the outer side of the lower shell. The exhaust port is communicated with the air inlet of the air-solid separator through a pipeline.
[0006] Further, a cold air duct is provided below the lower housing. The top of the cold air duct is communicated with the bottom of the lower housing through a discharge pipe, and the outlet end of the cold air duct is communicated with the gas-solid separator.
[0007] Further, a circulation pipe is connected to the exhaust port of the gas-solid separator. A heater is provided on the circulation pipe, and the gas outlet end of the circulation pipe is communicated with the gas inlet end of the hot air pipe.
[0008] Further, a fan blade is rotatably connected to the upper end of the vertical shaft after the vertical shaft extends out of the jet pipe.
[0009] Further, a dispersing blade is provided on the motor output shaft above the cross bar.
[0010] Further, pressure sensors are provided in both the upper housing and the lower housing.
[0011] When the utility model operates, the ammonium sulfate material to be dried is introduced into the screw conveyor. The screw conveyor conveys and uniformly feeds the ammonium sulfate material. The ammonium sulfate material falls from the feeding pipe into the upper housing and lands on the fluidized bed plate. Under the action of vibration, it passes through the fluidized bed plate and falls into the lower housing. When the pores on the fluidized bed plate are blocked and the ammonium sulfate material accumulates on the fluidized bed plate, the air cylinder and the motor can be started. The air cylinder drives the cross bar and the cleaning brush to move downward, and the motor drives the cross bar and the cleaning brush to rotate, cleaning the ammonium sulfate material accumulated on the fluidized bed plate and dredging the pores, ensuring that the ammonium sulfate material can uniformly and smoothly fall from the pores. At the same time, hot air is introduced into the jet pipe from the hot air pipe. Under the guiding action of the spiral blade, a swirling flow is formed after the hot air exits the jet pipe. The swirling flow can drive the ammonium sulfate material to flow together, increasing the contact time between the hot air and the ammonium sulfate material, improving the stirring ability of the hot air on the ammonium sulfate material, and further improving the drying effect of the hot air on the ammonium sulfate material. The hot air after drying the ammonium sulfate material is introduced into the gas-solid separator to separate the ammonium sulfate material wrapped in the hot air, avoiding environmental pollution when the hot air is discharged and reducing the waste of ammonium sulfate material. The utility model can dredge blockages, has good drying effect and less material waste, and has significant economic value and social value. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic diagram of the overall structure of the utility model;
[0013] In the figure: 1 - upper housing, 2 - lower housing, 3 - vibrator, 4 - screw conveyor, 5 - feeding pipe, 6 - air cylinder, 7 - motor, 8 - cross bar, 9 - cleaning brush, 10 - fluidized bed plate, 11 - exhaust port, 12 - hot air pipe, 13 - jet pipe, 14 - spiral blade, 15 - gas-solid separator, 16 - cold air duct, 17 - discharge pipe, 18 - circulation pipe, 19 - heater, 20 - fan blade, 21 - dispersing blade, 22 - pressure sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] The present utility model will be further described below in conjunction with the accompanying drawings, but it is not limited to the present utility model in any way. Any changes or improvements based on the present utility model fall within the protection scope of the present utility model.
[0015] As Figure 1 shown, the present utility model includes an upper housing 1, a lower housing 2, and a vibrator 3 provided on the outer wall of the lower housing 2. The upper housing 1 and the lower housing 2 can be connected by a flange, which is convenient for manufacturing, installation, and maintenance. The vibrator 3 is an existing device for generating vibration. A screw conveyor 4 is provided above the upper housing 1. A plurality of discharge ports are provided at the bottom of the screw conveyor 4. Each discharge port is communicated with the top of the upper housing 1 through a feeding pipe 5. A cylinder 6 is installed on the upper housing 1 near the feeding pipe 5. After the piston rod of the cylinder 6 extends into the upper housing 1, a motor 7 is provided. A cross bar 8 is provided on the output shaft of the motor 7. A cleaning brush 9 is provided on the lower surface of the cross bar 8. The cleaning brush 9 is an existing technology and can clean the ammonium sulfate material in the pores of the fluidized bed plate 10. A fluidized bed plate 10 with pores is provided in the upper housing 1 below the cleaning brush 9. An exhaust port 11 is provided in the upper part of the upper housing 1. A plurality of hot gas pipes 12 with blocked ends are arranged side by side in the lower part of the lower housing 2. A jet pipe 13 is uniformly provided at the top of each hot gas pipe 12. A vertical shaft is provided in the jet pipe 13, and a spiral blade 14 is provided on the vertical shaft. A gas-solid separator 15 is provided outside the lower housing 2. The exhaust port 11 is communicated with the air inlet of the gas-solid separator 15 through a pipeline.
[0016] When the present utility model operates, the ammonium sulfate material to be dried is introduced into the screw conveyor 4. The screw conveyor 4 conveys and uniformly feeds the ammonium sulfate material. The ammonium sulfate material falls from the feeding pipe 5 into the upper housing 1 and lands on the fluidized bed plate 10. Under the action of vibration, it passes through the fluidized bed plate 10 and falls into the lower housing 2. When the pores on the fluidized bed plate 10 are blocked and the ammonium sulfate material accumulates on the fluidized bed plate 10, the cylinder 6 and the motor 7 can be started. The cylinder 6 drives the cross bar 8 and the cleaning brush 9 to move downward, and the motor 7 drives the cross bar 8 and the cleaning brush 9 to rotate, cleaning the ammonium sulfate material accumulated on the fluidized bed plate 10 and dredging the pores to ensure that the ammonium sulfate material can fall smoothly and uniformly from the pores. At the same time, hot gas is introduced into the jet pipe 13 from the hot gas pipe 12. Under the guiding action of the spiral blade 14, a swirling flow is formed after spraying out of the jet pipe 13. The swirling flow can drive the ammonium sulfate material to flow together, increasing the contact time between the hot gas and the ammonium sulfate material, improving the stirring ability of the hot gas on the ammonium sulfate material, and further improving the drying effect of the hot gas on the ammonium sulfate material. The hot gas after drying the ammonium sulfate material is introduced into the gas-solid separator 15 to separate the ammonium sulfate material entrained in the hot gas, avoiding environmental pollution when the hot gas is discharged and reducing waste of the ammonium sulfate material.
[0017] A cold air duct 16 is arranged below the lower housing 2. The top of the cold air duct 16 is communicated with the bottom of the lower housing 2 through a discharge pipe 17. The outlet end of the cold air duct 16 is communicated with the gas-solid separator 15. During operation, pressurized cold air is introduced into the cold air duct 16. After the dried ammonium sulfate material falls into the cold air duct 16, it will be carried by the cold air and flow, and heat exchange will occur during the flow process, absorbing the heat in the ammonium sulfate to cool and chill the ammonium sulfate. After cooling, they enter the gas-solid separator 15 together for separation, and then the cooled ammonium sulfate is obtained.
[0018] A circulation pipe 18 is connected to the exhaust port of the gas-solid separator 15. A heater 19 is arranged on the circulation pipe 18. The air outlet end of the circulation pipe 18 is communicated with the air inlet end of the hot air pipe 12. The dried ammonium sulfate is cooled in the cold air duct 16 and then enters the gas-solid separator 15. Similarly, the hot air after drying the ammonium sulfate is also discharged into the gas-solid separator 15, and gas-solid separation is carried out in the gas-solid separator 15 to separate the ammonium sulfate solid in the gas. However, since the separated gas still contains a certain amount of heat, if it is directly discharged, it will undoubtedly cause waste of heat. It is passed through the heater 19 to be heated and raised in temperature, and then passed into the hot air pipe 12 to continue drying the ammonium sulfate, realizing the recycling of the hot air. On the one hand, it avoids waste of heat, and on the other hand, it can also avoid environmental pollution caused by the discharge of hot air.
[0019] The upper end of the vertical shaft extends out of the jet pipe 13 and is rotatably connected with a fan blade 20. The fan blade 20 is rotatably installed on the vertical shaft. When the hot air sprays out from the jet pipe 13, it will drive the fan blade 20 to rotate. When the fan blade 20 rotates, it will agitate and strike the falling ammonium sulfate particles, increasing the contact time between the ammonium sulfate particles and the hot air, and thus improving the drying efficiency of the ammonium sulfate.
[0020] A dispersing blade 21 is arranged on the output shaft of the motor 7 above the cross bar 8. When the motor 7 operates, it will drive the dispersing blade 21 to rotate. When the ammonium sulfate falls, it will be struck by the dispersing blade 21, thereby breaking up large pieces or large granular ammonium sulfate to prevent large pieces or large granular ammonium sulfate from accumulating on the fluidized bed plate 10 and causing blockage.
[0021] Pressure sensors 22 are arranged in both the upper housing 1 and the lower housing 2. The pressure sensors 22 detect the air pressure above and below the fluidized bed plate 10. When the air pressures are inconsistent, it may be that the pores on the fluidized bed plate 10 are blocked. At this time, the pores can be cleaned by the cleaning brush 9 to brush off the blocked materials in the pores, thereby ensuring the efficient operation of the drying system.
Claims
1. A ammonium sulfate drying system based on a vibrating fluidized bed, comprising an upper housing (1), a lower housing (2), and a vibrator (3) arranged on the outer wall of the lower housing (2), characterized in that Above the said upper housing (1), a screw conveyor (4) is provided. Multiple discharge ports are arranged at the bottom of the screw conveyor (4). Each discharge port is communicated with the top of the upper housing (1) through a feed pipe (5). A cylinder (6) is installed on the upper housing (1) near the feed pipe (5). After the piston rod of the cylinder (6) extends into the upper housing (1), a motor (7) is provided. A cross bar (8) is arranged on the output shaft of the motor (7). A cleaning brush (9) is arranged on the lower surface of the cross bar (8). Inside the upper housing (1) below the cleaning brush (9), a fluidized bed plate (10) with air holes is provided. An exhaust port (11) is arranged at the upper part of the upper housing (1). Inside the lower housing (2), multiple hot gas pipes (12) with sealed ends are arranged side by side at the lower part. At the top of each hot gas pipe (12), a jet pipe (13) is evenly arranged. A vertical shaft is arranged inside the jet pipe (13), and spiral blades (14) are arranged on the vertical shaft. An air-solid separator (15) is arranged on the outer side of the lower housing (2). The exhaust port (11) is communicated with the air inlet of the air-solid separator (15) through a pipeline.
2. The ammonium sulfate drying system based on a vibrating fluidized bed according to claim 1, characterized in that Below the said lower housing (2), a cold air pipe (16) is provided. The top of the cold air pipe (16) is communicated with the bottom of the lower housing (2) through a discharge pipe (17). The outlet end of the cold air pipe (16) is communicated with the air-solid separator (15).
3. The ammonium sulfate drying system based on a vibrating fluidized bed according to claim 1, wherein A circulation pipe (18) is connected to the exhaust port of the air-solid separator (15). A heater (19) is arranged on the circulation pipe (18). The gas outlet end of the circulation pipe (18) is communicated with the gas inlet end of the hot gas pipe (12).
4. The ammonium sulfate drying system based on a vibrating fluidized bed according to claim 1, characterized in that The upper end of the vertical shaft extends out of the jet pipe (13) and is rotatably connected with a fan blade (20).
5. The ammonium sulfate drying system based on a vibrating fluidized bed according to claim 1, wherein On the output shaft of the motor (7) above the cross bar (8), a dispersing blade (21) is arranged.
6. The ammonium sulfate drying system based on a vibrating fluidized bed according to claim 1, wherein Pressure sensors (22) are arranged inside both the upper housing (1) and the lower housing (2).