CN215115743U - Fluidized bed experimental device for researching motion characteristics of cold-state particles - Google Patents
Fluidized bed experimental device for researching motion characteristics of cold-state particles Download PDFInfo
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- CN215115743U CN215115743U CN202121225287.XU CN202121225287U CN215115743U CN 215115743 U CN215115743 U CN 215115743U CN 202121225287 U CN202121225287 U CN 202121225287U CN 215115743 U CN215115743 U CN 215115743U
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Abstract
The utility model discloses a fluidized bed experimental device for researching the motion characteristics of cold-state particles, which comprises an air inlet pipe section, a feeding pipe section, a lifting pipe section and a cyclone separator, wherein the air inlet pipe section is connected with the cyclone separator through an air return pipe section to form a closed circulation loop; gas enters the feeding pipe section along the air inlet pipe section to form upward moving gas flow; after falling into the feeding pipe section from the feeding hole, the solid material particles are carried to the lifting pipe section by the airflow under the action of the upward moving airflow, and the solid material particles in the lifting pipe section are in a suspended state and are fully contacted with the air; the cyclone separator separates gas from solid material particles, the solid material particles are collected in a material collecting port at the lower end of the cyclone separator, and meanwhile, the separated gas returns to the air inlet pipe section along the air return pipe section. Compare the fluidized bed that the structure is complicated in actual industrial application, the utility model discloses the structure is succinct, and convenient operation has increased feasibility and the convenience of cold attitude granule motion characteristic research.
Description
Technical Field
The utility model relates to a fluidized bed material is carried, collection device, concretely relates to fluidized bed experimental apparatus for studying cold attitude granule motion characteristic.
Background
A gas-solid fluidized bed is an apparatus which performs a gas-solid reaction process by passing a gas through a granular solid layer to bring solid particles into a suspended motion. The fluidized bed has the advantages of controlling the continuous input and output of solid material particles and enabling the conveyed particles to be in large-area contact reaction with a gas-phase medium, and is widely applied to the fields of chemical industry, plastics, grain and oil, medicines, food and the like. The gas-solid fluidized bed is used as an important tool in industrial process, and is mainly used for drying and pneumatic conveying of solid material particles. The transportation of solid particles during the operation of the fluidized bed is a complicated movement process, and on one hand, the particles and gas interact with each other, and on the other hand, the particles collide with each other, which factors increase the intensity of the movement of the particles, so that the particles are gathered at different positions in the fluidized bed to form clusters. The presence of particle clustering during the process is extremely detrimental to particle drying, reaction and the production of good quality material products. The research on the motion rule of solid particles in the fluidized bed is significant for the research on the mechanism of fluidized bed flow, heat transfer, mass transfer and the like and the design and development of the fluidized bed. However, in industrial practical application, the material particle treatment process is complicated, and the fluidized bed equipment has a complex structure, so that the fluidized bed equipment is difficult to apply to experimental research.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in view of the problems existing in the prior art, the utility model provides a fluidized bed experimental apparatus with simple structure and convenient operation, which is suitable for the research of the motion characteristic of cold-state particles.
The technical scheme is as follows: the fluidized bed experimental device for researching the motion characteristics of the cold state particles comprises an air inlet pipe section, a feeding pipe section, a lifting pipe section and a cyclone separator which are connected in sequence, wherein a feeding hole is formed in the feeding pipe section; the air inlet pipe section and the cyclone separator are connected through an air return pipe section to form a loop connected end to end;
gas enters the feeding pipe section along the air inlet pipe section to form upward moving gas flow; after falling into the feeding pipe section from the feeding hole, the solid material particles are carried to the lifting pipe section by the airflow under the action of the upward moving airflow, and the solid material particles in the lifting pipe section are in a suspended state and are fully contacted with the air; the cyclone separator separates gas from solid material particles, and the separated gas returns to the air inlet pipe section along the air return pipe section.
Further, the air inlet pipe section downward sloping sets up, and it is connected through first return bend the feeding pipe section, the feeding pipe section upward sloping sets up, and it is connected through the second return bend the riser section, the riser section is vertical to be arranged, and it connects cyclone through the third return bend. Preferably, the third bent pipe is a square bent pipe with a bending central angle of 90 degrees; all the pipe sections and the cyclone separator are made of organic glass.
Preferably, the included angle between the air inlet pipe section and the horizontal plane is 25-30 degrees. The included angle between the feeding pipe section and the horizontal plane is 40-45 degrees.
Furthermore, a material storage hopper is arranged on a feeding hole of the feeding pipe section and used for storing solid material particles. A partition plate is arranged in the storage hopper and used for controlling the falling speed of material particles. Preferably, the material storage hopper is of a cubic structure.
Furthermore, a butterfly valve is arranged at the position, close to the air inlet pipe section, of the air return pipe section and used for regulating and controlling the pressure inside the experimental device.
Furthermore, the central axis of the side wall of the pipeline of the lifting pipe section is provided with a pressure measuring hole for measuring the pressure in the experimental device.
Furthermore, the pipe orifice of the air inlet pipe section is connected with a fan through a canvas joint.
The device principle is as follows: the frequency conversion centrifugal fan operates, and the gas is sent into the visual fluidized bed experimental apparatus of cold state. The material particles stored in the storage hopper fall into the feeding pipe section, are mixed with air conveyed from the air inlet pipe section, and are carried to the lifting pipe section by the air. Under the carrying of air, the material particles are suspended and lifted in the lifting pipe section. The solid-phase material particles in the suspension state are fully contacted with the air in a gas-phase field; the material particles are carried to the cyclone separator by air, and gas-solid phases are separated under the action of gravity and centrifugal force. The material particles are collected at a material collecting port at the lower end of the cyclone separator, and meanwhile, the separated air returns to the air inlet pipe section through the air return pipe.
Has the advantages that: compare the fluidized bed of structure complicacy in actual industrial application, the utility model has the advantages of simple structure, measure the convenience, use in throwing into subject research easily, increased the feasibility and the convenience of cold attitude granule motion characteristic research, have higher using value.
Drawings
Fig. 1 is a schematic perspective view of a fluidized bed experimental apparatus for studying the motion characteristics of cold-state visualized particles according to the present invention;
fig. 2 is a side view of the structure of fig. 1.
Description of reference numerals: 1: a variable frequency centrifugal fan; 2: canvas joints; 3: an air inlet pipe section; 4, a first square bent pipe; 5: a feed pipe section; 6: a second square bend; 7: a partition plate; 8: a material storage hopper; 9: hoisting a pipe section; 10: a third square bend; 11: a cyclone separator; 12: a connector; 13: an air return pipe section; 14: butterfly valves.
Detailed Description
The structural features and the working principle of the present invention will be further described with reference to the accompanying drawings and the specific embodiments.
Referring to fig. 1 and 2, the utility model discloses a fluidized bed experimental apparatus for studying visual granule motion characteristic of cold state, it includes: frequency conversion centrifugal fan 1, canvas connect 2, air inlet pipe section 3, first square return bend 4, feeding pipe section 5, second square return bend 6, baffle 7, storage hopper 8, lift tube section 9, third square return bend 10, cyclone 11, connector 12, return air pipeline section 13 and butterfly valve 14.
Frequency conversion centrifugal fan 1 is located the experimental apparatus tip, and air inlet pipe section 3 connects 2 to be connected with frequency conversion centrifugal fan 1 through the canvas, and the canvas connects two ends cross-sectional dimension adaptation in 1 supply-air outlet of frequency conversion centrifugal fan and 3 air intake sizes in air inlet pipe section. The feeding pipe section 5 is connected with the air inlet pipe section 3 through a first square elbow 4. The storage hopper 8 is positioned above the feeding pipe section 5 and is connected with the feeding hole of the feeding pipe section, and the clapboard 7 is arranged in the lower part of the storage hopper 8. The riser section 9 is connected to the feed section by a second square bend 6. The cyclone separator 11 is connected to the riser section 9 via a third square bend 10. The return air pipe section 13 is an L-shaped round pipe and is connected with the cyclone separator 11 through a connector 12, and the size of the connector 12 is matched with the diameter of an air outlet of the cyclone separator 11 and the diameter of the return air pipe section 13. The butterfly valve 14 is arranged in the position of the return air pipe section close to the air inlet pipe section 3. The return air pipe section 13 is connected to the side wall of the air inlet pipe section 3 to form a closed cycle. Specifically, the structure/function of each of the above components is defined as follows:
frequency conversion centrifugal fan 1 lets experimental apparatus function under different operating modes through adjusting the amount of wind, and the required maximum amount of wind of experiment is 500m3/h。
The air inlet pipe section 3 is arranged in a downward inclined mode, the included angle between the air inlet pipe section 3 and the horizontal plane is 25-30 degrees, air enters the feeding pipe section along the air inlet pipe section, and the air inlet pipe section is connected with the canvas joint for the variable-frequency centrifugal fan to reduce the influence of fan vibration.
The feeding pipe section 5 is arranged in an upward inclined mode, an included angle between the feeding pipe section 5 and the horizontal plane is about 40-45 degrees, so that material particles fall into the feeding pipe section and are acted by upward moving air flow to move upwards, and the feeding pipe section and the air inlet pipe section are connected through a square elbow.
And the storage hopper 8 is of a cubic structure and is used for storing solid material particles, a horizontal partition plate 7 is arranged in the storage hopper and is used for controlling the falling speed of the material particles, and the lower end of the storage hopper is connected with a feeding hole in the upper wall surface of the feeding pipe section.
The solid material particles are carried by the air to be in a suspended state and fully contacted with the air, a plurality of circular holes are formed in the central axis of the side wall of the pipeline and used for measuring pressure, and the lifting pipe section is connected with the feeding pipe section through a square elbow.
The cyclone separator 11, solid material particle is left the lift pipe section by air entrainment and gets into cyclone separator, carries out gas-solid separation under the effect of gravity and centrifugal force, and gas is discharged from the gas vent of cyclone separator upper end, and the material particle is collected at the collecting gate of lower extreme, and preferred, cyclone separator and lift pipe section are connected (the crooked central angle is 90 °) with 90 square bend.
The separated gas returns to the air inlet pipe section along the air return pipe section 13, a butterfly valve is arranged at the position of the air return pipe section close to the air inlet pipe section to regulate and control the pressure in the experimental device, and the air return pipe section is connected with the cyclone separator through a connector.
The device principle is as follows: the frequency conversion centrifugal fan operates, and the gas is sent into the visual fluidized bed experimental apparatus of cold state. The material particles stored in the storage hopper fall into the feeding pipe section, are mixed with air conveyed from the air inlet pipe section, and are carried to the lifting pipe section by the air. Under the carrying of air, the material particles are suspended and lifted in the lifting pipe section. The solid-phase material particles in the suspension state are fully contacted with the air in a gas-phase field; the material particles are carried to the cyclone separator by air through the 90-degree square bent pipe, and gas and solid are separated under the action of gravity and centrifugal force. The material particles are collected at a material collecting port at the lower end of the cyclone separator, and meanwhile, the separated air returns to the air inlet pipe section through the air return pipe. Preferably, each pipe section and the cyclone separator are made of organic glass.
By adopting the cold state visual experimental device, the working process of researching the motion characteristics of the particles is as follows:
firstly, before an experiment begins, a proper amount of material particles are stored in a material storage hopper for conveying the experiment; the particle motion is detected by an optical method, a high-speed camera is placed right in front of the lift pipe section, the lift pipe section can be filled with screen pictures, and the number of frames is set to 3000 and 6000fps for shooting.
Secondly, opening a variable-frequency centrifugal fan and adjusting air volume; when the fan stably runs, measuring by using a pressure sensor through a pressure measuring hole on the side wall of the lifting pipe section to obtain the empty bed running pressure drop; after the data collection is finished, the partition plate at the lower end of the storage hopper is drawn out to enable material particles to slowly slide into the device, the material particles are conveyed to the lifting pipe section by the air flow to be fluidized, after the material particles stably flow, the bed pressure drop when the particles are conveyed is measured at the pressure measuring hole of the lifting pipe section, and the material particles are carried to the cyclone separator by the air flow to be separated after being continued for a period of time.
And thirdly, continuously shooting the material particles moving in the lifting pipe section by the high-speed camera, and transmitting the obtained image to a computer for processing by related software.
Claims (10)
1. A fluidized bed experimental device for researching the motion characteristics of cold state particles is characterized by comprising an air inlet pipe section, a feeding pipe section, a lifting pipe section and a cyclone separator which are connected in sequence, wherein a feeding hole is formed in the feeding pipe section; the air inlet pipe section and the cyclone separator are connected through an air return pipe section to form a closed circulation loop connected end to end;
gas enters the feeding pipe section along the air inlet pipe section to form upward moving gas flow; after falling into the feeding pipe section from the feeding hole, the solid material particles are carried to the lifting pipe section by the airflow under the action of the upward moving airflow, and the solid material particles in the lifting pipe section are in a suspended state and are fully contacted with the air; the cyclone separator separates gas from solid material particles, the solid material particles are collected in a material collecting port at the lower end of the cyclone separator, and meanwhile, the separated gas returns to the air inlet pipe section along the air return pipe section.
2. The fluidized bed experimental apparatus for studying the motion characteristics of the cold-state particles as claimed in claim 1, wherein: the air inlet pipe section is arranged in a downward inclined mode and connected with the feeding pipe section through a first bent pipe, the feeding pipe section is arranged in an upward inclined mode and connected with the lifting pipe section through a second bent pipe, the lifting pipe section is vertically arranged, and the lifting pipe section is connected with the cyclone separator through a third bent pipe.
3. The fluidized bed experimental apparatus for studying the motion characteristics of the cold-state particles as claimed in claim 2, wherein: the included angle between the air inlet pipe section and the horizontal plane is 25-30 degrees.
4. The fluidized bed experimental apparatus for studying the motion characteristics of the cold-state particles as claimed in claim 2, wherein: the included angle between the feeding pipe section and the horizontal plane is 40-45 degrees.
5. The fluidized bed experimental apparatus for studying the motion characteristics of the cold-state particles as claimed in claim 2, wherein: the third bent pipe is a square bent pipe with a bending central angle of 90 degrees.
6. The fluidized bed experimental apparatus for studying the motion characteristics of the cold-state particles as claimed in claim 1, wherein: and a material storage hopper is arranged on a feed inlet of the feed pipe section and used for storing solid material particles.
7. The fluidized bed experimental apparatus for studying the motion characteristics of the cold-state particles as claimed in claim 6, wherein: a partition plate is arranged in the storage hopper and used for controlling the falling speed of material particles.
8. The fluidized bed experimental apparatus for studying the motion characteristics of the cold-state particles as claimed in claim 1, wherein: and a butterfly valve is arranged at the position, close to the air inlet pipe section, of the air return pipe section and used for regulating and controlling the pressure inside the experimental device.
9. The fluidized bed experimental apparatus for studying the motion characteristics of the cold-state particles as claimed in claim 1, wherein: and the central axis of the side wall of the pipeline of the lifting pipe section is provided with a pressure measuring hole for measuring the pressure in the experimental device.
10. The fluidized bed experimental apparatus for studying the motion characteristics of the cold-state particles as claimed in claim 1, wherein: the mouth of pipe of air inlet pipe section passes through the canvas and connects the fan.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121225287.XU CN215115743U (en) | 2021-06-02 | 2021-06-02 | Fluidized bed experimental device for researching motion characteristics of cold-state particles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121225287.XU CN215115743U (en) | 2021-06-02 | 2021-06-02 | Fluidized bed experimental device for researching motion characteristics of cold-state particles |
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| CN215115743U true CN215115743U (en) | 2021-12-10 |
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| CN202121225287.XU Active CN215115743U (en) | 2021-06-02 | 2021-06-02 | Fluidized bed experimental device for researching motion characteristics of cold-state particles |
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