CN115744310A - Reducing self-suction paper basin vibration type multi-material synchronous mixing and continuous powder feeding device - Google Patents
Reducing self-suction paper basin vibration type multi-material synchronous mixing and continuous powder feeding device Download PDFInfo
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- CN115744310A CN115744310A CN202211457529.7A CN202211457529A CN115744310A CN 115744310 A CN115744310 A CN 115744310A CN 202211457529 A CN202211457529 A CN 202211457529A CN 115744310 A CN115744310 A CN 115744310A
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- 239000000843 powder Substances 0.000 title claims abstract description 110
- 239000000463 material Substances 0.000 title claims abstract description 91
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 18
- 239000007921 spray Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims 1
- 238000005243 fluidization Methods 0.000 abstract description 4
- 230000005587 bubbling Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000002028 Biomass Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 241000197194 Bulla Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000002352 blister Diseases 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
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Abstract
The invention discloses a variable-diameter self-suction paper cone vibration type multi-material synchronous mixing and continuous powder feeding device, which comprises a material mixing system and a plurality of branch powder feeding systems, wherein the material mixing system comprises a plurality of branch powder feeding systems; the material mixing system comprises a gas supply pipe, a mixing cavity, a main powder supply pipe and the like; the branch powder feeding system comprises a branch powder feeding pipe and the like. The screw rod is connected with the output shaft of the motor, the lifting platform is in threaded fit with the screw rod, and the powder feeding speed of each material is independently controlled by controlling the rotating speed of the motor of the powder feeding systems of different branches, so that the powder feeding proportion of mixed materials in the mixing cavity is controlled. The front end of the mixing cavity is connected with a reducing pressure reducing and speed increasing spray pipe, the speed of carrying gas is increased, the pressure of the gas is reduced, and the negative pressure in the mixing cavity is maintained, so that materials of the branch powder feeding system can smoothly fall into the mixing cavity. The lower semi-cylindrical surface of the mixing cavity is provided with a loudspeaker type vibration device, and the caused vibration can enable the materials entering the mixing cavity to be in a bubbling fluidization state, be uniformly mixed and flow along with the carrying gas.
Description
Technical Field
The invention relates to the technical field of combustion of solid fuels such as pulverized coal, biomass and the like and the technical field of material conveying, in particular to a variable-diameter self-suction paper basin vibration type multi-material synchronous mixing and continuous powder feeding device which is used for realizing mixing and continuous powder feeding of one or more solid materials.
Background
In the experimental process of studying the burning rate of the single-particle material, the powder feeding rate in the high-temperature environment is required to be controlled within a small range so as to weaken or eliminate the mutual influence among the single particles in the high-temperature environment, so that continuous, micro-amount and stable powder feeding is required.
In the application environment, the existing screw type feeding and distributing device is a powder feeding device which is widely applied, but in the actual use process, when a screw powder feeder is used for conveying powdery materials with strong viscosity and accumulation, such as biomass, lignite and the like, blockage is easy to occur, blanking is not easy, certain vibration needs to be applied, and the stability and the applicability of the powder feeding process are influenced.
Chinese patent application No. 201510541954.8 discloses a multi-material synchronous mixing and continuous micro-powder feeding device, which can provide continuous micro-feeding as low as 0.01g/min, but the flow design direction of the carried air flow in the device can generate a certain squeezing effect on the materials in the powder feeding process, which can generate lumps when the materials with stronger viscosity are conveyed, thereby affecting the stability and uniformity of the powder feeding and causing unpredictable results. So that the situation that the feed delivery pipe is blocked frequently occurs in the actual use process, which brings inconvenience to the actual use.
When a research on the effect of mixed combustion of various fuels or additives on fuels is carried out in a laboratory, different materials are mixed in a silo in a certain selected proportion and fed by using a traditional single material feeding mode [ Zhao Qing, shanghai college bulletin, 2014,36 (6): 511-515]. However, due to the difference of the density and the shape of different materials, the actual feeding proportion is different from the material mixing proportion in the silo, and a significant error exists.
In the multi-material mixing powder feeding research in a laboratory, the stable and unchanged material mixing ratio and the micro-powder conveying are often required to be realized at the same time, but the powder feeding speed is higher and the mixing ratio is unstable in the mode of direct mixing and conventional feeding in a material bed, which is widely adopted at present, so that larger errors can be brought, and the requirements can not be met.
Disclosure of Invention
The invention aims to provide a variable-diameter self-suction paper basin vibration type multi-material synchronous mixing and continuous powder feeding device, which can realize continuous micro powder feeding of one or more solid materials and can provide the powder feeding rate as low as 0.005 g/min.
In order to achieve the purpose, the invention adopts the technical scheme that:
a variable-diameter self-suction paper cone vibration type multi-material synchronous mixing and continuous powder feeding device comprises a material mixing system and a plurality of branch powder feeding systems; the material mixing system comprises a gas supply pipe, a variable-diameter pressure-reducing speed-increasing spray pipe, a cone type vibration surface, a loudspeaker type vibration device, a mixing cavity and a main powder supply pipe; the branch powder feeding system comprises a motor, a screw rod, a lifting platform, a storage pipe bracket, a storage pipe and a branch powder feeding pipe;
the screw rod is connected with the output shaft of the motor, and the lifting platform is in threaded fit with the screw rod; a material storage pipe bracket is arranged on the lifting platform; a storage pipe is fixedly arranged in the storage pipe bracket and keeps surface contact, a round hole is formed in the bottom of the storage pipe, a branch powder supply pipe extends into the storage pipe through the round hole and contacts with a material, and the upper surface of the branch powder supply pipe is flush with the material surface; the bottom of the branch powder feeding pipe of each branch powder feeding system is fixedly connected with the mixing cavity, and the upper end surface of the cone-type vibrating surface is connected with the mixing cavity; the air supply pipe is connected with the mixing cavity through the reducing pressure reducing and speed increasing spray pipe, and the outlet of the mixing cavity is connected with the main powder supply pipe.
The invention is further improved in that the material mixing system is arranged below the branch powder feeding systems.
The invention is further improved in that the mixing cavity is cylindrical, the top of the mixing cavity is fixedly connected with each branch feeding pipe, and the lower semi-cylindrical plane is provided with a cone-type vibrating surface.
A further improvement of the invention is that a loudspeaker-type vibratory device is arranged below the cone-type vibratory surface, providing different vibration frequencies and amplitudes.
The invention is further improved in that the storage pipe bracket is fixed with the lifting platform, so that the storage pipe is ensured to vertically move in the lifting process.
The powder feeding device is further improved in that the branch feeding and distributing pipe extends into the storage pipe through a circular cavity formed in the lower end of the storage pipe and is in contact with materials stored in the storage pipe, the branch feeding and distributing pipe and the storage pipe move relatively in the powder feeding process, and the upper surfaces of the materials in the branch feeding and distributing pipe and the storage pipe are enabled to be flush.
The invention has the further improvement that the upper end of the material storage pipe is provided with a material storage pipe sealing silica gel plug, so that impurity gas is prevented from being brought in the powder feeding process.
The invention has the further improvement that the powder feeding speed of each material is independently controlled by controlling the rotating speed of the motors of the powder feeding systems of different branches, so that the powder feeding proportion of the mixed materials in the mixing cavity is controlled.
The invention has the further improvement that the speed of the carrying airflow is increased and the pressure intensity is reduced through the reducing pressure reducing and accelerating spray pipe, negative pressure is formed in the mixing cavity, the materials in the branch powder feeding pipes are sucked, the materials are ensured to move along with the carrying airflow under the vibration of the loudspeaker type vibration device, and the distance between the materials and the materials of the branch powder feeding pipes is prolonged and the materials are mixed with each other.
Compared with the prior art, the invention has at least the following beneficial technical effects:
the movable storage pipe is arranged at the lower part of the fixed and sealed air chamber and is driven by the motor to move upwards at a certain speed; the powder feeding device is parallel to and level with the powder feeding descending pipe in the powder feeding process, and the negative pressure formed in the mixing cavity can ensure that materials cannot be adhered to the wall surface of the powder feeding descending pipe; after the materials of each branch enter the shell-mounted mixing cavity, the materials can be smoothly and uniformly mixed under the action of the cone-type vibration device, so that the aim of uniformly mixing various materials is fulfilled; the lifting speed of the platform of each powder feeding branch can be respectively adjusted, and the powder feeding speed of each powder feeding branch can be adjusted by adjusting the lifting speed of the motor, so that the ratio of materials can be conveniently adjusted; the cone type vibration device can enable the particles to be always in an airflow passage, and a fluidization state is easy to form, so that the particles are easy to carry. The distance between the bottom of the branch powder feeding pipe and the material is determined by the carrying airflow speed, the powder feeding speed is determined by the rotating speed of the motor, and continuous and stable micro-powder feeding at low carrying airflow speed can be realized.
Drawings
FIG. 1 is a schematic view of a variable diameter self-priming cone vibration type multi-material synchronous mixing and continuous powder feeding device of the present invention.
Description of the reference numerals:
1. the air supply pipe comprises an air supply pipe 2, a reducing pressure reducing and speed increasing spray pipe 3, a cone type vibration surface 4, a loudspeaker type vibration device 5, a mixing cavity 6, a main powder supply pipe 7, a branch powder supply pipe 8, a lifting platform 9, a lead screw 10, a motor 11, a storage pipe 12, a storage pipe support 13 and a storage pipe sealing silica gel plug.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the variable diameter self-priming cone vibration type multi-material synchronous mixing and continuous powder feeding device provided by the invention comprises a material mixing system and a plurality of branch powder feeding systems; the material mixing system comprises a gas supply pipe 1, a reducing pressure reducing and speed increasing spray pipe 2, a cone type vibration surface 3, a loudspeaker type vibration device 4, a mixing cavity 5 and a main powder supply pipe 6; the branch powder feeding system comprises a motor 10, a screw rod 9, a lifting platform 8, a storage pipe support 12, a storage pipe 11, a storage pipe sealing silica gel plug 13 and a branch powder feeding pipe 7.
The branch powder feeding systems are arranged in parallel and are independently controlled without interference, and the powder feeding speed of each material is independently controlled by controlling the rotating speed of the motors of the different branch powder feeding systems, so that the powder feeding proportion of mixed materials at the outlet of the material mixing device is controlled.
The screw rod 9 is connected with an output shaft of a motor 10, the lifting platform 8 is in threaded fit with the screw rod 9, the lifting speed of the lifting platform 8 can be controlled by adjusting the rotating speed of the stepping motor 10, and the relative height of the storage pipe 11 relative to the branch powder feeding pipe 7 is further controlled; a storage pipe bracket 12 is arranged on the lifting platform 8; the bottom of the storage pipe 11 is provided with a round hole, the branch powder feeding pipe 7 extends into the storage pipe 11 through the round hole and is in contact with the material, and the upper surface of the branch powder feeding pipe 7 is flush with the surface of the material; the storage pipe support 12 is fixed with the lifting platform 8, the storage pipe 11 is fixedly installed in the storage pipe support 12 and keeps surface contact, and the storage pipe 11 and the branch powder feeding pipe 7 keep vertical and concentric. The mixing cavity 5 is provided with openings connected with the branch powder feeding systems on the upper surface along the airflow direction, the number of the openings can be set according to the types of different materials to be mixed, the bottom of a branch powder feeding pipe 7 of each branch powder feeding system is fixedly connected with the mixing cavity 5, and the upper end surface of the cone-shaped vibrating surface 3 is connected with the mixing cavity; the gas supply pipe 1 is connected with a mixing cavity 5 through a reducing pressure reducing and speed increasing spray pipe 2, and the outlet of the mixing cavity 5 is connected with a main powder supply pipe 6. And the lower semi-cylindrical surface of the mixing cavity 5 is provided with a loudspeaker type vibration device 4, so that materials falling from the branch powder feeding system can be kept in a good bubbling fluidization state under the action of the vibration device.
A reducing speed-increasing spray pipe 2 is arranged between the gas supply pipe 1 and the mixing cavity 5, the speed of carrying air flow is increased through the spray pipe 2, the pressure intensity is reduced, the negative pressure in the cavity is maintained and relaxed, and the smooth falling of the materials of the branch powder supply pipe 7 is ensured.
The storage tube 11 is provided with a storage tube sealing silica gel plug 13 which is in sealing fit with the storage tube 11, so that magazine materials are prevented from being brought into the powder feeding tube in the powder feeding process, and simultaneously, the aspiration of the impurity gas into the mixing cavity 5 is avoided.
When the device works, a certain amount of materials are loaded into the material storage pipe 11, the relation between the speed of the materials entering the mixing cavity 5 and the speed of the corresponding stepping motor is firstly calibrated according to the stacking density of different materials, a relevant corresponding relation is established, and the speeds of the stepping motors of different branches are set according to working conditions. The beginning is given and is carried gas, carry gas can form the negative pressure in hybrid chamber 5 after reducing step-down speeding up spray tube 2 for lift platform 8 is at the ascending in-process, the material is after exceeding the branch road and giving the interface of powder pipe 7, because the negative pressure in the hybrid chamber 5 can fall smoothly, get into hybrid chamber 5, and be the tympanic bulla fluidization state under the effect of speaker formula vibrator 4 of hybrid chamber 5 lower surface, and then mix in proper order under the effect of carrying gas, and carry the material and transport.
In conclusion, the invention can realize micro powder feeding, and the lowest continuous stable powder feeding speed reaches 5mg/min: the powder can be continuously and stably fed when the carrying airflow speed is close to the main airflow speed, the micro-powder feeding of the carrying airflow can be realized, the influence on the temperature field and the speed field of the outlet of the main powder feeding pipe is small, and the method has important significance on the experiment of the carrying flow reactor with short retention time: the accurate quantitative mixing powder feeding of various materials can be realized by adjusting the rotating speed of each material driving motor.
Claims (9)
1. A variable-diameter self-suction paper cone vibration type multi-material synchronous mixing and continuous powder feeding device is characterized by comprising a material mixing system and a plurality of branch powder feeding systems; the material mixing system comprises a gas supply pipe (1), a reducing pressure-reducing speed-increasing spray pipe (2), a cone-type vibrating surface (3), a loudspeaker-type vibrating device (4), a mixing cavity (5) and a main powder supply pipe (6); the branch powder feeding system comprises a motor (10), a screw rod (9), a lifting platform (8), a storage pipe bracket (12), a storage pipe (11) and a branch powder feeding pipe (7);
the screw rod (9) is connected with an output shaft of the motor (10), and the lifting platform (8) is in threaded fit with the screw rod (9); a material storage pipe bracket (12) is arranged on the lifting platform (8); a storage pipe (11) is fixedly installed in the storage pipe bracket (12) and keeps surface contact, a round hole is formed in the bottom of the storage pipe (11), a branch powder supply pipe (7) extends into the storage pipe (11) through the round hole and contacts with the material, and the upper surface of the branch powder supply pipe (7) is flush with the material surface; the bottom of a branch powder feeding pipe (7) of each branch powder feeding system is fixedly connected with the mixing cavity (5), and the upper end surface of the cone type vibration surface (3) is connected with the mixing cavity (5); the gas supply pipe (1) is connected with the mixing cavity (5) through the reducing pressure reducing speed increasing spray pipe (2), and the outlet of the mixing cavity (5) is connected with the main powder supply pipe (6).
2. The variable diameter self-priming cone vibratory multi-material synchronous mixing and continuous feeding device as claimed in claim 1, wherein the material mixing system is arranged below the plurality of branch feeding systems.
3. The variable diameter self-priming cone vibratory multi-material synchronous mixing and continuous feeding device as claimed in claim 1, wherein the mixing chamber (5) is cylindrical in shape, the top of the mixing chamber is fixedly connected with each branch feeding pipe (7), and the lower semi-cylindrical plane is provided with cone vibratory surfaces (3).
4. A variable diameter self-priming cone vibratory multi-material synchronous mixing and continuous powdering device according to claim 3, characterized in that a speaker type vibratory device (4) is arranged below the cone type vibratory surface (3) to provide different vibration frequencies and amplitudes.
5. The variable-diameter self-priming cone vibration type multi-material synchronous mixing and continuous powder feeding device as claimed in claim 1, wherein the storage tube support (12) is fixed with the lifting platform (8) to ensure that the storage tube (11) moves vertically during lifting.
6. The variable-diameter self-suction paper basin vibration type multi-material synchronous mixing and continuous powder feeding device as claimed in claim 1, wherein the branch feeding branch pipe (7) extends into the storage pipe (11) through a circular hole formed in the lower end of the storage pipe (11) and is in contact with materials stored in the storage pipe (11), the branch feeding branch pipe (7) and the storage pipe (11) move relatively in the powder feeding process, and the upper surfaces of the materials in the storage pipe (11) of the branch feeding branch pipe (7) are flush.
7. The variable diameter self-priming paper basin vibration type multi-material synchronous mixing and continuous powder feeding device as claimed in claim 1, wherein the upper end of the storage tube (11) is provided with a storage tube sealing silica gel plug (13) to avoid introducing impurity gas in the powder feeding process.
8. The variable diameter self-priming cone vibratory multi-material synchronous mixing and continuous powder feeding device as claimed in claim 1, wherein the powder feeding rate of each material is independently controlled by controlling the rotation speed of the motor (1) of different branch powder feeding systems, thereby controlling the powder feeding ratio of the mixture in the mixing chamber (5).
9. The variable diameter self-priming cone vibratory multi-material synchronous mixing and continuous powder feeding device as claimed in claim 1, wherein the carrying air flows through the variable diameter pressure reducing and accelerating nozzle (2), the speed is increased, the pressure is reduced, negative pressure is formed in the mixing cavity (5), the materials in the powder feeding pipes are sucked in the branch paths, and the materials are ensured to move along with the carrying air flows under the vibration of the loudspeaker type vibration device (4) and are extended to be mixed with the materials in the powder feeding pipes of the branch paths.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211457529.7A CN115744310A (en) | 2022-11-21 | 2022-11-21 | Reducing self-suction paper basin vibration type multi-material synchronous mixing and continuous powder feeding device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211457529.7A CN115744310A (en) | 2022-11-21 | 2022-11-21 | Reducing self-suction paper basin vibration type multi-material synchronous mixing and continuous powder feeding device |
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| CN202211457529.7A Pending CN115744310A (en) | 2022-11-21 | 2022-11-21 | Reducing self-suction paper basin vibration type multi-material synchronous mixing and continuous powder feeding device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0264943A2 (en) * | 1986-10-23 | 1988-04-27 | Warner-Lambert Company | Improved powder feeder |
| CN105151797A (en) * | 2015-08-28 | 2015-12-16 | 西安交通大学 | Synchronous mixing and continuous micro-feeding device for various materials |
| CN106081629A (en) * | 2016-08-04 | 2016-11-09 | 中国神华能源股份有限公司 | Powder conveying apparatus |
| CN107879115A (en) * | 2017-11-10 | 2018-04-06 | 哈尔滨工业大学 | A kind of bubble type pressurization trace quantity gives powder device |
| CN216511467U (en) * | 2021-12-29 | 2022-05-13 | 苏州市淳然环境技术有限公司 | Electrostatic spraying fluidization powder returning device |
-
2022
- 2022-11-21 CN CN202211457529.7A patent/CN115744310A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0264943A2 (en) * | 1986-10-23 | 1988-04-27 | Warner-Lambert Company | Improved powder feeder |
| CN105151797A (en) * | 2015-08-28 | 2015-12-16 | 西安交通大学 | Synchronous mixing and continuous micro-feeding device for various materials |
| CN106081629A (en) * | 2016-08-04 | 2016-11-09 | 中国神华能源股份有限公司 | Powder conveying apparatus |
| CN107879115A (en) * | 2017-11-10 | 2018-04-06 | 哈尔滨工业大学 | A kind of bubble type pressurization trace quantity gives powder device |
| CN216511467U (en) * | 2021-12-29 | 2022-05-13 | 苏州市淳然环境技术有限公司 | Electrostatic spraying fluidization powder returning device |
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