High-efficiency steam curing and drying system for high-strength ardealite
By designing a high-efficiency steam-curing and drying system for high-strength phosphogypsum, the problems of complex high-strength gypsum preparation processes and high energy consumption have been solved, an efficient and continuous crystallization and drying process has been achieved, and product quality and production efficiency have been improved.
Patent Information
- Application Number
- CN202421151048.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The preparation process of high-strength gypsum has problems such as complex pretreatment process, high crystallization temperature, large liquid-solid ratio, and insufficient economic benefits.
An efficient steam curing and drying system for high-strength phosphogypsum is designed, including a high-frequency vibrating screen, a mixing bin, a multi-layer belt trolley, a steam curing system and a fluidized bed. Through high-frequency vibrating screen screening, mixing bin mixing, multi-layer Belt trolley transportation, steam curing system steam curing and fluidized bed drying optimize the crystallization and drying process of phosphogypsum.
It improves the crystal transfer efficiency and product quality, reduces energy consumption and waste generation, realizes continuous production, improves production efficiency, and the product quality is stable and reliable, meeting various performance requirements of high-strength gypsum powder.
Smart Images
Figure CN222374595U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of phosphogypsum processing equipment, in particular to a high-strength phosphogypsum high-efficiency steaming and drying system. Background Art
[0002] Phosphogypsum is a by-product of the wet-process phosphoric acid production process. Since it contains impurities such as water-soluble P2O5, water-soluble F and some organic matter, the utilization of phosphogypsum has become an industry problem. As the country pays more and more attention to the utilization of phosphogypsum, the storage of phosphogypsum can no longer be an effective solution.
[0003] High-strength gypsum powder has the advantages of being waterproof, fireproof, environmentally friendly, and lightweight. It is the best material for improving the quality, grade, and upgrading of various gypsum products. It has great application prospects in self-leveling and building blocks. At present, most high-strength gypsum is prepared from natural gypsum. The preparation of high-strength gypsum from phosphogypsum has the characteristics of complex pretreatment process, high crystal transformation temperature, large liquid-solid ratio, and unclear economic benefits.
[0004] At present, there are three main preparation processes for high-strength gypsum in China, one is the autoclave method, one is the hydrothermal method, and the other is the combined use of the above two methods.
[0005] The process of steam curing is as follows: after pretreatment, phosphogypsum is placed in an autoclave, steam is introduced, and at a certain temperature and pressure, after a certain steam curing time, the dihydrate gypsum is converted into high-strength hemihydrate gypsum. This production process has high energy consumption and intermittent production.
[0006] The hydrothermal method is to place a mixed solution of dihydrate phosphogypsum and a crystal-changing agent in a reactor and convert it into hemihydrate gypsum at a certain temperature and pressure. The advantage of this production process is high product quality, but the disadvantage is high requirements for raw materials and high energy consumption.
[0007] The joint production process of the two is: dihydrate phosphogypsum and a crystal-changing agent are mixed in an aqueous solution, and pressurized and stirred to crystallize and prepare hemihydrate gypsum. This production process has unstable product quality, a high liquid-to-solid ratio, a large footprint, and high energy consumption. Utility Model Content
[0008] The purpose of the utility model is to provide a high-strength phosphogypsum efficient steaming and drying system to solve the problems raised in the above background technology that most of the current high-strength gypsum is prepared from natural gypsum, and the preparation of high-strength gypsum from phosphogypsum has the characteristics of complex pretreatment process, high crystal transformation temperature, large liquid-to-solid ratio, and unclear economic benefits.
[0009] To achieve the above-mentioned purpose, the utility model provides a high-strength phosphogypsum efficient steaming and drying system, comprising a high-frequency vibrating screen, a mixing bin is arranged at one end of the high-frequency vibrating screen, a multi-layer belt trolley is arranged at one end of the mixing bin, a steaming system is arranged at one end of the multi-layer belt trolley, a fluidized bed is installed at one end of the steaming system, a warehouse is arranged at one end of the fluidized bed, the steaming system comprises an inclined tank body, high-temperature steam is introduced into the tank body through a pipeline, a feeding port is arranged at the top end of the tank body, and a discharge port is arranged at the bottom end of the tank body.
[0010] Preferably, a first feed port is provided at the top of the mixing chamber, a plurality of rotating shafts are installed inside the mixing chamber, a plurality of stirring rods are installed on the outer wall of the rotating shaft, one end of the rotating shaft is driven to rotate by a motor, and a feed port is provided at the bottom of one side of the mixing chamber.
[0011] Preferably, the stirring rods are arranged at equal intervals.
[0012] Preferably, there are two rotating shafts, which are arranged vertically and parallelly.
[0013] Preferably, a plurality of filter belts are installed in sequence from top to bottom inside the multi-layer belt trolley, a second feed port is arranged at the top of the multi-layer belt trolley, and a discharge port is arranged at one side of the bottom of the multi-layer belt trolley.
[0014] Preferably, a serpentine flow channel is formed between the filter belts, a water receiving trough is provided at the bottom of the multi-layer belt trolley, and a drainage pipe is connected to one side of the water receiving trough.
[0015] Preferably, a universal wheel is installed at the bottom of the multi-layer belt trolley.
[0016] Preferably, a ramp block is provided at the bottom of the multi-layer belt trolley near the discharge port.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] In the high-strength phosphogypsum efficient steam curing and drying system, the system first screens the phosphogypsum through a high-frequency vibrating screen, effectively controls the particle size of the material, and provides high-quality uniform materials for the subsequent crystallization process, thereby improving the crystallization efficiency and product quality. In the mixing bin, the design of multiple rotating shafts and stirring rods allows the phosphogypsum and additives to be fully mixed, ensuring the uniform distribution of the crystallization agent, laying the foundation for the subsequent steam curing process. The steam curing system adopts an inclined tank body, which is heated by passing high-temperature steam, so that the phosphogypsum can be evenly heated in the tank body, and due to the inclined design of the tank body, the material will slowly move downward under the action of gravity, increasing the contact time between the material and the steam, thereby improving the steam curing effect. Compared with the traditional intermittent production method, the system design of the utility model allows the entire processing process to be carried out continuously, thereby improving production efficiency and reducing energy consumption. By optimizing the steam curing and drying process, energy consumption and waste generation are reduced, and the fluidized bed drying method is also more efficient and environmentally friendly. The phosphogypsum processed by this system has stable and reliable product quality, meets all performance requirements of high-strength gypsum powder, and provides strong support for the widespread application of high-strength gypsum. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Figure 2 This is a schematic diagram of the structure of the mixing bin in the utility model;
[0021] Figure 3 It is a schematic diagram of the structure of the multi-layer belt trolley in the utility model.
[0022] The meaning of each number in the figure is:
[0023] 1. High-frequency vibrating screen; 2. Mixing bin; 21. Rotating shaft; 22. Mixing rod; 23. Motor; 24. First feed port; 25. Feed port; 3. Multi-layer belt trolley; 31. Filter belt; 32. Second feed port; 33. Discharge port; 34. Universal wheel; 35. Water trough; 36. Inclined block; 37. Drain pipe; 4. Steaming system; 5. Fluidized bed; 6. Warehouse. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] The utility model provides a high-strength phosphogypsum high-efficiency steaming and drying system, such as Figure 1-Figure 3 As shown, it includes a high-frequency vibrating screen 1, a mixing bin 2 is provided at one end of the high-frequency vibrating screen 1, a multi-layer belt trolley 3 is provided at one end of the mixing bin 2, a steaming system 4 is provided at one end of the multi-layer belt trolley 3, a fluidized bed 5 is installed at one end of the steaming system 4, a warehouse 6 is provided at one end of the fluidized bed 5, and the steaming system 4 includes an inclined tank body, high-temperature steam is introduced into the tank body through a pipeline, a feeding port is provided at the top of the tank body, and a discharge port is provided at the bottom of the tank body.
[0026] In this embodiment, a first feed port 24 is provided at the top of the mixing bin 2, a plurality of rotating shafts 21 are installed inside the mixing bin 2, a plurality of stirring rods 22 are installed on the outer wall of the rotating shaft 21, one end of the rotating shaft 21 is driven to rotate by a motor 23, and a material removal port 25 is provided at the bottom of one side of the mixing bin 2 to facilitate the removal of materials.
[0027] Specifically, the stirring rods 22 are arranged at equal intervals to facilitate uniform stirring.
[0028] Furthermore, there are two rotating shafts 21, which are arranged in parallel up and down to facilitate uniform stirring.
[0029] Furthermore, a plurality of filter belts 31 are installed in sequence from top to bottom inside the multi-layer belt trolley 3, a second feed port 32 is arranged at the top of the multi-layer belt trolley 3, and a discharge port 33 is arranged at one side of the bottom of the multi-layer belt trolley 3 to facilitate the discharge of materials.
[0030] Furthermore, a serpentine flow channel is formed between the filter belts 31 , and a water receiving trough 35 is provided at the bottom of the multi-layer belt trolley 3 , and a drainage pipe 37 is connected to one side of the water receiving trough 35 .
[0031] Furthermore, a universal wheel 34 is installed at the bottom of the multi-layer belt trolley 3 to facilitate the movement of the multi-layer belt trolley 3.
[0032] Furthermore, a slope block 36 is provided at the bottom of the multi-layer belt trolley 3 near the discharge port 33 to facilitate smooth sliding of the materials.
[0033] The utility model comprises the following steps:
[0034] S1. After the phosphogypsum is screened with a high-frequency vibrating screen to remove large and small particles, select the raw material with the appropriate particle size;
[0035] S2. After measuring the raw materials, pretreatment agent, water and crystal conversion agent, mix them in a stirring device and age them for 1-2 days;
[0036] S3. The aged raw materials are sent into the steam curing system using a multi-layer belt trolley, the steam curing pressure is controlled at 0.3-0.6MPa, the steam curing temperature is 130-160°C, and the steam curing time is 3-6h for steam curing crystal transformation;
[0037] S4. After the crystallization is completed, the material is immediately sent to the fluidized bed drying system through the track after decompression and cooling. After drying, it does not need to be crushed and enters the finished product warehouse.
[0038] After the material with suitable particle size is selected by high-frequency vibration screen, the product can be the finished high-strength gypsum powder without crushing, which is also conducive to the subsequent crystallization and drying.
[0039] The multi-layer belt trolley filter cloth has the function of filtering water and ventilation, which is convenient for steaming, drying and unloading. The steaming kettle presents a slope of 5-10 degrees, which is convenient for the discharge of system water during steaming and affects the subsequent pressure reduction and temperature reduction when the material absorbs water and turns into dihydrate gypsum.
[0040] The fluidized bed drying system is adopted, the drying temperature is 130-160℃, the drying time is 3-6h, and the material can be dried to obtain the finished high-strength gypsum powder without crushing.
[0041] Finally, it should be noted that the electronic components of the steaming system 4, fluidized bed 5, etc. in this embodiment are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires respectively. The specific connection means should refer to the working sequence between the electrical components in the above-mentioned working principle to complete the electrical connection, which are all well-known technologies in the art.
[0042] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A high-strength phosphogypsum high-efficiency steam curing and drying system, comprising a high-frequency vibrating screen (1), characterized in that: A stirring bin (2) is arranged at one end of the high-frequency vibration screen (1), a multi-layer belt trolley (3) is arranged at one end of the stirring bin (2), a steaming system (4) is arranged at one end of the multi-layer belt trolley (3), a fluidized bed (5) is installed at one end of the steaming system (4), a warehouse (6) is arranged at one end of the fluidized bed (5), and the steaming system (4) comprises an inclined tank body, high-temperature steam is introduced into the tank body through a pipeline, a feeding port is arranged at the top end of the tank body, and a discharge port is arranged at the bottom end of the tank body.
2. The high-strength phosphogypsum efficient steaming and drying system according to claim 1 is characterized in that: A first feed port (24) is provided at the top of the stirring chamber (2), a plurality of rotating shafts (21) are installed inside the stirring chamber (2), a plurality of stirring rods (22) are installed on the outer wall of the rotating shaft (21), one end of the rotating shaft (21) is driven to rotate by a motor (23), and a material removal port (25) is provided at the bottom of one side of the stirring chamber (2).
3. The high-strength phosphogypsum efficient steam curing and drying system according to claim 2 is characterized in that: The stirring rods (22) are arranged at equal intervals.
4. The high-strength phosphogypsum efficient steaming and drying system according to claim 2 is characterized in that: The number of the rotating shafts (21) is two, and they are arranged vertically and parallelly.
5. The high-strength phosphogypsum efficient steaming and drying system according to claim 1 is characterized in that: A plurality of filter belts (31) are installed in sequence from top to bottom inside the multi-layer belt trolley (3), a second feed port (32) is arranged at the top of the multi-layer belt trolley (3), and a discharge port (33) is arranged at one side of the bottom of the multi-layer belt trolley (3).
6. The high-strength phosphogypsum efficient steaming and drying system according to claim 5 is characterized in that: A serpentine flow channel is formed between the filter belts (31), and a water receiving trough (35) is provided at the bottom of the multi-layer belt trolley (3), and a drainage pipe (37) is connected to one side of the water receiving trough (35).
7. The high-strength phosphogypsum efficient steaming and drying system according to claim 5 is characterized in that: A universal wheel (34) is installed at the bottom of the multi-layer belt trolley (3).
8. The high-strength phosphogypsum efficient steaming and drying system according to claim 5 is characterized in that: A slope block (36) is provided at the bottom of the multi-layer belt trolley (3) near the discharge port (33).