Powder particle size separation device
By designing a powder particle size separation device that includes scrapers and baffles, two-stage screening of coal powder was achieved, solving the problem of incomplete separation of coarse and fine powders, avoiding repeated grinding and resource waste, and improving separation efficiency.
Patent Information
- Application Number
- CN202422725237.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-08
AI Technical Summary
In existing technologies, coal powder separation devices only perform a single sieving process, resulting in incomplete separation of coarse and fine powders, leading to repeated grinding and resource waste.
A powder particle size separation device was designed, which includes first and second separation chambers. By using the cooperation of scrapers and baffles, coarse powder is scraped and pushed on the first screen and enters the second separation chamber for secondary screening, ensuring the complete separation of coarse and fine powder.
By performing two screenings, the repeated grinding of fine powder is avoided, resource waste is reduced, separation efficiency is improved, the operation process is simplified, and labor consumption is reduced.
Smart Images
Figure CN223517906U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to powder separation device technical field, concretely relates to a powder granularity separation device. BACKGROUND
[0002] A thermal power plant, abbreviated as a thermal power plant, is a factory that uses combustible materials (such as coal) as fuel to produce electric energy. Its basic production process is: when the fuel is burned, the water is heated to generate steam, the chemical energy of the fuel is converted into heat energy, the steam pressure drives the steam turbine to rotate, the heat energy is converted into mechanical energy, and then the steam turbine drives the generator to rotate, converting mechanical energy into electric energy.
[0003] Large thermal power plants burn coal powder to improve coal combustion efficiency, so the raw coal in the coal bucket is first sent to the coal mill to be ground into coal powder, and the coarse powder and fine powder in the ground coal powder need to be separated to ensure that the coal powder added to the furnace is uniform in particle size.
[0004] Currently, when screening coal powder, it is mostly passed through a screen, and the fine powder under the screen is used for combustion, and the coarse powder on the screen is ground again in the coal mill. However, such a one-time screening may not completely separate the fine powder from the coarse powder, and the coarse powder may be repeatedly ground when it is ground again, resulting in resource waste. In addition, the coarse powder left above the screen after screening is usually removed by tilting the screen, which is not only troublesome to use, but also wastes manpower. UTILITY MODEL CONTENTS
[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a powder granularity separation device to solve the technical problems of the current separation device, which only screens once, resulting in incomplete separation of coarse and fine coal powder, and repeated grinding of coarse powder when it is ground again, resulting in resource waste.
[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a powder granularity separation device, the separation device comprises a feeding hopper, a first separation barrel communicated with the feeding hopper, a second separation barrel, and a fine powder collecting hopper arranged below the first separation barrel and the second separation barrel; a first screen is arranged in the first separation barrel, a scraper driven by a driving member and capable of moving along the first screen is arranged above the first screen; a baffle is hingedly connected to the upper end of the scraper, the end of the baffle away from the scraper is slidingly connected in a sliding groove arranged on the front and rear side walls of the first separation barrel, and the sliding groove is arranged close to the right side wall of the first separation barrel; a communication port communicated with the second separation barrel is arranged at the position of the first screen on the left side wall of the first separation barrel; a second screen is arranged in the second separation barrel below the communication port; a coarse powder discharge port is arranged at the lower end of the second screen in the second separation barrel; and the lower ends of the first screen and the second screen are communicated with the fine powder collecting hopper.
[0007] Preferably, the lower end of the scraper is provided with a brush head in contact with the first screen.
[0008] Preferably, the first screen is obliquely arranged, and the inclination angle is smaller than that of the second screen.
[0009] Preferably, the driving member is a hydraulic cylinder, the telescopic rod of which extends into the first separation barrel and is connected with the scraper, and the hydraulic cylinder is fixedly connected to a support plate arranged on one side of the first separation barrel.
[0010] Preferably, the telescopic rod is parallel to the first screen and is obliquely arranged.
[0011] Preferably, the bottom of the fine powder collecting hopper is obliquely arranged, and a fine powder discharge port is arranged at the lowest end of the fine powder collecting hopper.
[0012] The technical scheme of the present application has the following beneficial effects:
[0013] The present application is provided with two separation barrels, and screens are arranged in the two separation barrels. The coarse powder separated in the first separation barrel is sent into the second separation barrel, and is screened again by the second screen, so as to ensure more thorough screening of the coarse powder and the fine powder, and avoid the problem that the not thoroughly screened fine powder is sent into the coal mill again, causing repeated grinding and wasting of resources. The chute is arranged on the right side wall of the first separation barrel, the both ends of the baffle are slidably connected in the chute, the lower end of the baffle is hingedly connected with the scraper, the scraper can be driven to reciprocate along the first screen by the driving member, the coarse powder screened on the first screen is pushed into the second separation barrel, and the coarse powder is screened again in the second separation barrel, so as to ensure sufficient screening. When the coarse powder on the first screen is pushed by the scraper to move into the second separation barrel, the movable end of the baffle is driven to move, the upper end of the baffle is slid in the chute, and the coal powder falling from the feeding hopper without being screened is shielded, so as to avoid the falling coal powder from blocking the scraper when the scraper returns, and ensure normal use of the scraper. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a main view of an embodiment of the powder particle size separation device.
[0015] Figure 2 It is a left view of an embodiment of the powder particle size separation device.
[0016] Among them, Figure 1 , 2In the middle, 1-feeding hopper, 2-the first separation bucket, 21-communication, 22-slideway, 23-supporting plate, 3-the second separation bucket, 31-coarse powder discharge port, 4-fine powder collecting hopper, 41-fine powder discharge port, 5-the first screen, 6-the second screen, 7-scraper, 71-brush head, 8-hydraulic cylinder, 9-shutter, 91-sliding shaft. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments, and do not limit the scope of the utility model.
[0018] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0019] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0020] The specific embodiments are as follows:
[0021] Embodiment 1, as Figure 1 , 2As shown, a powder particle separation device, the separation device includes a feed hopper 1, a first separation barrel 2, a second separation barrel 3 and a fine powder collecting hopper 4. The feed hopper 1 is fixedly connected to the upper end of the first separation barrel 2, for guiding the separated coal powder into the first separation barrel 2. The second separation barrel 3 is arranged on the left side of the first separation barrel 2, close to the lower end of the second separation barrel 3. A communication port 21 is arranged on the left side wall of the first separation barrel 2, which is in communication with the second separation barrel 3. A first screen 5 is arranged in the first separation barrel 2, and the left end of the first screen 5 is arranged at the lower end of the communication port 21. A second screen 6 is arranged in the second separation barrel 3 below the communication port 21, and the second screen 6 is arranged obliquely, and a coarse powder discharge port 31 is arranged on the side wall of the second separation barrel at the lower end of the second screen 6. The inclined second screen 6 facilitates the automatic discharge of coarse powder from the coarse powder discharge port 31, and the coarse powder on the second screen 6 can be completely discharged by manual scraping if necessary. The fine powder collecting hopper 4 is arranged below the first separation barrel 2 and the second separation barrel 3, for collecting fine powder screened by the first screen 5 and the second screen 6.
[0022] In this embodiment, the first screen and the second screen are both connected with a vibration driving member, which facilitates the separation of the two screens under the driving of the vibration driving member.
[0023] A scraper 7 is arranged above the first screen 5 in the first separation barrel 2, and the scraper 7 can reciprocate along the first screen 5 under the driving of the driving member, and push and scrape the coarse powder screened on the first screen 5, and push the screened coarse powder into the second separation barrel 3. A baffle 9 is hinged to the upper end of the scraper 7, and slide shafts 91 are arranged on the upper end of the baffle 9, which are slidingly connected in slide grooves 22 arranged on the front and rear side walls of the first separation barrel 2, and the slide grooves 22 are arranged vertically and close to the right side wall of the first separation barrel 2. When the scraper 7 slides to the left, the lower end of the baffle 9 is driven to the left, and the upper end of the baffle 9 slides downward along the slide grooves 22, and the baffle 9 is inclined above the first screen 5, so that the baffle 9 intercepts the coal powder falling from the feed hopper 1, avoiding the coal powder falling on the right side of the scraper 7, avoiding the obstruction when the scraper 7 slides to the right, and ensuring the normal pushing and scraping use of the scraper 7.
[0024] The coal powder to be separated enters the first separating barrel 2 from the feeding hopper 1 and falls on the first screen 5 for screening, and the fine powder falls into the fine powder collecting hopper 4, and the coarse powder remains above the first screen 5. After a certain time interval, the coarse powder on the first screen 5 accumulates more, at which time the driving member drives the scraper 7 to slide to the left, and the coarse powder is pushed into the second separating barrel 3 from the communication port 21, falls on the second screen 6 for secondary screening, so that the fine powder in the coarse powder is separated thoroughly, and the fine powder separated again falls into the fine powder collecting hopper 4, and the coarse powder screened on the second screen 6 is discharged from the coarse powder discharge port 31. After being screened twice in the first separating barrel 2 and the second separating barrel 3, the fine powder in the coal powder is screened more thoroughly, and the fine powder is prevented from being sent into the coal mill again for repeated grinding, and resource waste is reduced.
[0025] Further, the lower end of the scraper 7 is provided with a brush head 71, the lower end of the brush head 71 is in contact with the first screen 5, and the first screen 5 is also conveniently cleaned by the brush head 71 during the process of pushing the coarse powder.
[0026] Further, the first screen 5 is inclined to facilitate pushing the coarse powder on the first screen 5 into the second separating barrel 3. In the embodiment, the inclination direction of the first screen 5 is the same as that of the second screen 6, and the inclination angle of the first screen 5 is smaller than that of the second screen 6.
[0027] Further, the driving member is a hydraulic cylinder 8, which is arranged on the right side of the first separating barrel 2 and fixedly connected to the support plate 23 arranged on the right side of the first separating barrel 2. The telescopic rod of the hydraulic cylinder 8 extends into the first separating barrel 2, and the end of the telescopic rod is fixedly connected to the scraper 7 to drive the movement of the scraper 7.
[0028] In the embodiment, the telescopic rod is arranged obliquely parallel to the first screen 5 to ensure that the scraper 7 can always be close to the first screen 5.
[0029] Further, the bottom of the fine powder collecting hopper 4 is inclined, and a fine powder discharge port 41 is arranged at the lowest end of the fine powder collecting hopper 4, and the inclined bottom facilitates automatic discharge of the fine powder, which is more convenient.
[0030] The utility model is described exemplarily above in combination with the drawings, and obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as various non-essential improvements are made by adopting the technical scheme of the utility model, or the concept and technical scheme of the utility model are directly applied to other occasions without improvement, which are all within the protection scope of the utility model.
Claims
1. A powder particle size separation device, characterized by, The separation device comprises a feeding hopper, a first separation barrel in communication with the feeding hopper, a second separation barrel, and a fine powder collecting hopper arranged below the first separation barrel and the second separation barrel; a first screen is arranged in the first separation barrel, a scraper driven by a driving member and capable of moving along the first screen is arranged above the first screen; a shielding plate is hingedly connected to the upper end of the scraper, the end of the shielding plate away from the scraper is slidingly connected to a sliding groove arranged on the front and rear side walls of the first separation barrel, and the sliding groove is arranged close to the right side wall of the first separation barrel; a communication port in communication with the second separation barrel is arranged at the position of the first screen on the left side wall of the first separation barrel; a second screen is arranged in the second separation barrel below the communication port; a coarse powder discharge port is arranged at the lower end of the second separation barrel; and the first screen and the second screen are in communication with the fine powder collecting hopper.
2. The powder particle size separation device of claim 1, wherein A brush head is arranged at the lower end of the scraper, and the brush head is in contact with the first screen.
3. The powder particle size separation device of claim 1, wherein The first screen is arranged in an inclined manner, and the inclination angle is smaller than that of the second screen.
4. The powder particle size separation apparatus of claim 3, wherein The driving member is a hydraulic cylinder, the telescopic rod of the hydraulic cylinder is connected to the scraper and arranged in the first separation barrel, and the hydraulic cylinder is fixedly connected to a support plate arranged on one side of the first separation barrel.
5. The powder particle size separation apparatus of claim 4, wherein The telescopic rod is parallel to the first screen and arranged in an inclined manner.
6. The powder particle size separation device of claim 1, wherein The bottom of the fine powder collecting hopper is arranged in an inclined manner, and a fine powder discharge port is arranged at the lowest end of the fine powder collecting hopper.