Continuous solid-liquid separation equipment
By setting a cone cylinder and a stirring paddle in the cylinder of the solid-liquid separation equipment, the rapid settlement and separation of the catalyst is achieved by using gravity and stirring, which solves the problem that traditional filters are difficult to achieve controllable proportions of continuous solid-liquid separation and separation of the catalyst, and realizes continuous online separation and control of the catalyst.
Patent Information
- Application Number
- CN202420655724.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-01
AI Technical Summary
It is difficult for traditional filters to achieve continuous solid-liquid separation and controllability of the catalyst, especially when the service life of the catalyst is different.
A continuous solid-liquid separation device is designed. By setting a cone in the cylinder, it is divided into two parts, and a stirring paddle and a liquid stopper are set up in the lower part, so as to achieve rapid settlement and separation of the catalyst by gravity and stirring.
Continuous online separation of catalysts is realized, the yield and return ratio of catalysts is controlled, continuous production is supported, equipment investment is small, and the cost of use is low.
Smart Images
Figure CN222605699U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solid-liquid separation, in particular to continuous solid-liquid separation equipment. Background Art
[0002] Solid-liquid separation is a common unit operation in chemical processes, typically the separation of catalysts in slurry bed reactors. In the production process of slurry bed reactors, the catalyst has a certain service life and needs to be extracted and regenerated. During continuous reactions, the catalyst flows out of the reactor along with the reaction liquid. Some catalysts need to be partially returned to the reactor for recycling after being extracted. The lifespan of the catalysts is different, and the proportion of catalysts that flow out of the reactor and return to the reactor needs to be controlled. The catalyst is easy to settle in the reaction liquid. If a traditional filter is used, it involves the conversion of different phases, and it is difficult to achieve continuous solid-liquid separation of the catalyst and controllable separation ratio. Summary of the invention
[0003] The utility model provides continuous solid-liquid separation equipment, which is particularly suitable for online separation of catalysts and helps to realize continuous production.
[0004] The technical solution of the utility model is to provide a continuous solid-liquid separation equipment, including a cylinder, a cone cylinder is arranged in the cylinder, the end of the cone cylinder with a large diameter faces upward and is connected to the inner wall of the cylinder, the end of the cone cylinder with a small diameter faces downward and is provided with a through hole at the tip, and the cylinder is divided into an upper and lower part by the cone cylinder; a feed port is arranged on the side of the lower part of the cylinder, a slurry outlet is arranged at the bottom, and a clear liquid outlet is arranged on the upper part of the cylinder.
[0005] Furthermore, a stirring paddle is provided at the lower part of the cylinder, one end of the stirring shaft is located above the outside of the cylinder and connected to the driving device, and the other end passes through the through hole of the cone cylinder to connect to the stirring paddle, and the stirring shaft and the through hole do not contact each other to form a gap structure for the passage of materials.
[0006] Furthermore, the width of the gap is 1-10 mm.
[0007] Furthermore, a plurality of liquid baffles are provided above the tip of the cone, the thickness of the liquid baffles is 1-20 mm, and the lower ends of the liquid baffles are close to the through holes but do not contact the stirring shaft.
[0008] Furthermore, the stirring paddle is an anchor type, turbine type, propeller type or frame type stirring paddle.
[0009] Furthermore, the cone is a filter cloth structure.
[0010] The utility model has the following beneficial effects:
[0011] The utility model arranges a cone in the cylinder to divide it into two parts, an upper part and an lower part, and feeds from the lower part. The slurry containing the solid phase is mixed evenly in the lower part. With the continuous addition of the slurry, part of the slurry passes through the through hole of the cone and enters the upper part of the cylinder. The solid phase is settled and separated under the action of gravity, and the clear liquid in the upper part overflows from the clear liquid outlet at the upper part of the cylinder. An agitator is arranged at the lower part of the cylinder. After the materials are fully mixed, they can be returned to the reaction system for reuse through the slurry outlet at the bottom, or be subsequently separated and regenerated. Since no agitator structure is arranged at the upper part of the cylinder, the solid phase can quickly settle back to the lower part of the cylinder.
[0012] Furthermore, a plurality of liquid baffles are arranged above the tip of the cone, which have a certain strength and thickness, and can avoid stirring disturbance in the lower part of the cylinder as much as possible, forming clear liquid in the upper part, and realizing rapid sedimentation and separation of solid and liquid. The slurry in the lower part is evenly mixed and can be directly returned to the reaction system.
[0013] The device has a reasonable structural design. By using the device to separate the catalyst of the reaction system, the amount of catalyst taken out of the reaction system and returned to the reactor can be controlled, fluid operation and continuous production can be realized, the equipment investment is small, and the use cost is low. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model system. DETAILED DESCRIPTION
[0015] The embodiments of the present invention will be described in detail below in conjunction with examples, but those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention.
[0016] like Figure 1 As shown, a continuous solid-liquid separation equipment comprises a cylinder 1, in which a cone 2 is arranged, the end of the cone with a larger diameter faces upward and is connected to the inner wall of the cylinder 1, the end of the cone with a smaller diameter faces downward and a through hole 2-1 is arranged at the tip, and the cylinder 1 is divided into an upper part and a lower part by the cone 2; a feed inlet 1-1 is arranged on the side of the lower part of the cylinder 1, a slurry outlet 1-2 is arranged on the bottom, and a clear liquid outlet 1-3 is arranged on the upper part of the cylinder.
[0017] The cylinder 1 may be a reactor type, with the bottom and top sealed with heads to form a closed container; a reaction tank may also be used, with a cone to separate the upper and lower spaces.
[0018] Preferably, a stirring paddle 3 is provided at the lower part of the cylinder 1, one end of the stirring shaft 4 is located above the outside of the cylinder and connected to the driving device, and the other end passes through the through hole of the cone cylinder and is connected to the stirring paddle, and the stirring shaft 4 and the through hole 2-1 are not in contact with each other to form a gap structure for the passage of materials. By providing a stirring paddle and a stirring shaft, the slurry at the lower part of the cylinder can be stirred and mixed, and the concentrated slurry can be returned for circulation or extracted for subsequent treatment.
[0019] Preferably, the width of the gap is 1-10 mm. The gap should be small while ensuring that the medium can flow through.
[0020] Preferably, a plurality of liquid baffles 5 are provided above the tip of the cone 2, the thickness of the liquid baffles is 1-20 mm, and the lower end of the liquid baffles is close to the through hole but does not contact the stirring shaft. The liquid baffles have a certain strength and thickness, which can increase the force on the cone at this location and prevent the stirring of the lower slurry from disturbing the upper part of the cylinder.
[0021] Preferably, the stirring paddle 3 is an anchor type, turbine type, propeller type or frame type stirring paddle.
[0022] Preferably, the cone is a filter cloth structure. The filter cloth structure can better filter the solid-liquid mixture with a small solid phase size, and the liquid can enter the upper part of the cylinder through the micropores of the filter cloth, while the solid phase is blocked. If a filter cloth cone is used, the gap between the stirring shaft and the cone can be made smaller, and the solid phase mixture can be prevented from entering the upper part of the cylinder through the gap structure as much as possible. The cone can also adopt a rigid plate structure, in which case the solid-liquid mixture can only enter the upper part of the cylinder through the gap structure, and the solid phase is no longer separated by sedimentation on the cylinder.
[0023] During continuous reaction, the catalyst flows out of the reactor together with the reaction liquid. Some catalysts need to be partially returned to the reactor for recycling after being extracted. The lifespan of the catalysts is different, and the proportion of the catalysts flowing out of the reactor returning to the reactor needs to be controlled. When the equipment provided by the utility model is used to process the reaction liquid with solid-phase catalyst, the material enters the cylinder from the feed port on the side of the lower part of the cylinder. Due to the high density of the catalyst, it settles downward under the action of gravity. As the material is gradually added, part of the material will enter the upper part of the cylinder through the gap structure. There is no stirring structure in the upper part of the cylinder, and the solid-phase catalyst can be better settled back to the lower part of the cylinder. The liquid phase in the upper part gradually clarifies and overflows from the clear liquid outlet 1-3. Due to the setting of the stirring paddle in the lower part of the cylinder, the material distribution is still relatively uniform. The extraction pump can be used to directly transport the slurry in the lower part back to the reactor for circulation. When the service life of the catalyst reaches the requirement, the circulation ratio of the catalyst can be controlled by the material transportation flow rate and extraction amount, so as to realize continuous production.
[0024] The above embodiments are only for illustrating the technical ideas and features of the utility model, and the contents are only preferred embodiments of the utility model, but the protection scope of the utility model is not limited thereto. Within the technical scope disclosed by the utility model, equivalent changes or improvements based on the technical solution and utility model concept of the utility model should be included in the protection scope of the utility model.
Claims
1. A continuous solid-liquid separation device, characterized in that: The invention comprises a cylinder (1), wherein a conical cylinder (2) is arranged inside the cylinder, wherein the end of the conical cylinder with a larger diameter faces upward and is connected to the inner wall of the cylinder (1), and the end of the conical cylinder with a smaller diameter faces downward and is provided with a through hole (2-1) at the tip, and the cylinder (1) is divided into an upper part and a lower part by the conical cylinder (2); a feed port (1-1) is arranged on the side of the lower part of the cylinder (1), a slurry outlet (1-2) is arranged at the bottom, and a clear liquid outlet (1-3) is arranged at the upper part of the cylinder.
2. The continuous solid-liquid separation equipment according to claim 1, characterized in that: A stirring paddle (3) is provided at the bottom of the cylinder (1); one end of the stirring shaft (4) is located above the outside of the cylinder and connected to a driving device, and the other end passes through a through hole of the cone cylinder and is connected to the stirring paddle; the stirring shaft (4) and the through hole (2-1) are not in contact with each other, forming a gap structure for material to pass through.
3. The continuous solid-liquid separation equipment according to claim 2, characterized in that: The width of the gap is 1-10 mm.
4. The continuous solid-liquid separation equipment according to claim 3, characterized in that: A plurality of liquid baffles (5) are provided above the tip of the cone (2), the thickness of the liquid baffles being 1 to 20 mm, and the lower ends of the liquid baffles being close to the through holes but not in contact with the stirring shaft.
5. The continuous solid-liquid separation equipment according to claim 2, characterized in that: The stirring paddle (3) is an anchor type, turbine type, propeller type or frame type stirring paddle.
6. The continuous solid-liquid separation equipment according to any one of claims 1 to 5, characterized in that: The cone cylinder is a filter cloth structure.