CN114602230B - Air-blowing prying type residual filter cake removing assembly - Google Patents
Air-blowing prying type residual filter cake removing assembly Download PDFInfo
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- CN114602230B CN114602230B CN202210260169.5A CN202210260169A CN114602230B CN 114602230 B CN114602230 B CN 114602230B CN 202210260169 A CN202210260169 A CN 202210260169A CN 114602230 B CN114602230 B CN 114602230B
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- 239000012065 filter cake Substances 0.000 title claims abstract description 67
- 238000007664 blowing Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000007790 scraping Methods 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 17
- 238000010926 purge Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 description 12
- 238000007599 discharging Methods 0.000 description 7
- 238000000926 separation method Methods 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008241 heterogeneous mixture Substances 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
- B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6438—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles
- B01D29/6446—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles with a rotary movement with respect to the filtering element
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cleaning In General (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of residual filter cake treatment, and particularly relates to an air blowing prying type residual filter cake cleaning assembly. The invention comprises an air-blowing knife which comprises a blade for scraping materials, and is characterized in that: the blade is in an arc tile shape, and the arc opening of the blade faces to the advancing direction of the blade; the air blowing knife further comprises a knife back nozzle, and the air flow jet direction of the knife back nozzle points to the back surface of the blade, so that the air flow flows to the cutting edge of the blade along the back surface of the cambered surface-shaped blade. The invention can not only utilize the air blowing knife therein to generate vortex-shaped air flow force of 'prying upwards' for the residual filter cake, thereby being capable of prying upwards the residual filter cake, and simultaneously being matched with the rotary action of the rotary shaft and the scraper rest, and being capable of completing the purging and unloading functions for all the residual filter cake surfaces; the invention well completes the aim of purging and removing the residual filter cake, has high filter cake removal rate, remarkably improves the filtration efficiency and correspondingly prolongs the cycle period of the filtration medium.
Description
Technical Field
The invention belongs to the technical field of residual filter cake treatment, and particularly relates to an air blowing prying type residual filter cake cleaning assembly.
Background
Filtration is one of the most common and effective chemical unit operations for separating liquid/solid heterogeneous mixtures, and is in the form of air press filtration, vacuum filtration, mechanical extrusion, etc. in industrial production. During filtration, the liquid in the mixture passes through the meshes of the filter medium, and the solid materials in the mixture are trapped on the surfaces of the filter medium such as filter cloth, a metal filter screen or a filter element, so that the purpose of solid-liquid separation is achieved. In the filtering operation, as the filtering process is carried out, the thickness of the solid particle layer, namely the filter cake, is continuously increased, so that the filtering resistance is continuously increased, and the filtering rate is continuously reduced, therefore, the thickness of the filter cake is one of key factors influencing the filtering rate. In the production, the filter equipment can achieve the purpose of removing filter cakes through various structural modes, such as a scraper/scraping plate structure, a vibrating structure, a filter bag overturning structure, a flushing structure and the like; the filter cake discharging mode of the filter equipment with wider application range, such as a multifunctional filter washing drying integrated machine, a flat plate type scraper lower discharging centrifugal machine and the like, is scraper discharging, namely the scraper scrapes and discharges the filter cake layer by rotating and penetrating. In order to protect the filter medium from being scratched, a gap of about 10mm is finally formed between the scraper and the filter medium, and the filter cake remained in the gap is a residual filter cake and cannot be removed by the scraper. According to the above, the residual filter cake can reduce the next filtration rate, and can also cause cross-use and mixing between each batch of materials, and the residual filter cake has to be removed by manual cleaning in production practice. In the filtering equipment with larger specification and model, the residual filter cake reaches hundreds of kilograms, which not only greatly reduces the production efficiency, but also has larger labor intensity; if the materials are toxic or flammable and explosive, certain potential safety hazards are also provided for manual removal, and the problem needs to be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the air blowing prying type residual filter cake removing component which is compact in structure and convenient and reliable to use, and can be applied to the existing filter cake scraping equipment, so that an air blowing knife in the component can be utilized to generate vortex-shaped air flow force for prying the residual filter cake, the residual filter cake can be pryed up, and the sweeping and removing functions of all residual filter cake surfaces can be completed by matching with the rotary action of a rotary shaft and a scraper frame; the invention well completes the aim of purging and removing the residual filter cake, has high filter cake removal rate, remarkably improves the filtration efficiency and correspondingly prolongs the cycle period of the filtration medium.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a residual filter cake of air blow sled formula clears away subassembly, includes air blow sword, this air blow sword including the blade that is used for scraping material, its characterized in that: the blade is in an arc tile shape, and the arc opening of the blade faces to the advancing direction of the blade; the air blowing knife further comprises a knife back nozzle, and the air flow jet direction of the knife back nozzle points to the back surface of the blade, so that the air flow flows to the cutting edge of the blade along the back surface of the cambered surface-shaped blade.
Preferably, the assembly further comprises a swivel shaft rotatable about its own axis; the top of the rotary shaft is provided with a power source for driving the rotary shaft to rotate, the bottom of the rotary shaft is radially extended with a scraper frame, and a blade back nozzle is arranged at the scraper frame; the scraper rest and the rotary shaft are hollow and are communicated with each other to form a sealing cavity, so that the cavity of the scraper rest is communicated with the inner cavity of the rotary shaft and the joint cavity of the back nozzle spray cavity.
Preferably, the shape of the scraper frame is in a regular triangular table shape with thin top and thick bottom, the bottom surface of the scraper frame is fixed at the rotary shaft, the air blowing knife is arranged at the front side plate of the scraper frame, the knife back nozzle is arranged at the lower side plate of the scraper frame, and the height of a front edge formed by the cooperation of the front side plate and the lower side plate is lower than that of a rear edge formed by the cooperation of the rear side plate and the lower side plate.
Preferably, the included angle alpha between the lower side plate and the horizontal plane is 8-12 degrees; the included angle beta between each edge of the regular triangular platform-shaped scraper frame and the top surface of the prismatic platform is 85-89 degrees.
Preferably, the number of the scraping knife rest is two, and the scraping knife rest is circumferentially and uniformly distributed along the axis of the rotary shaft; the air blowing cutters are more than two groups and are sequentially arranged along the length direction of the corresponding scraper rest, and the advancing paths of all the air blowing cutters are matched with each other to form a round cleaning surface which is matched with the shape of the filter cake.
Preferably, bottom nozzles communicated with the inner cavity of the rotary shaft are arranged on the bottom surface of the rotary shaft, and the bottom nozzles are more than two groups and are axially symmetrically arranged relative to the axis of the rotary shaft; in a plan view parallel to the axis of the rotary shaft, the bottom nozzles are formed in a scroll-like arrangement, and the injection direction of the bottom nozzles is directed in the direction of rotation of the rotary shaft.
Preferably, the curvature k=0.015 to 0.03 of the blade.
The invention has the beneficial effects that:
1) Based on the structure of the original scraping knife, the invention provides an air-blowing knife structure, thereby realizing the redirecting and advancing function of the air flow at the knife back nozzle by utilizing the bonding effect of the air flow ejected by the knife back nozzle along the arc knife back, and finally enabling the high-pressure air flow to be ejected to the cutting edge area along the arc knife back to form the air-blowing knife. The high-pressure air flow redirected to the cutting edge of the air blowing knife can compensate and act on the matching gap between the cutting edge of the blade and the filter plate, so that vortex-shaped air flow force of prying upwards is generated on the residual filter cake at the matching gap, and the purpose of prying up the residual filter cake is achieved. With the rotation action of the rotating shaft and the scraper rest, the specific arc opening of the blade is matched, and the tilted residual filter cake can complete the purging and unloading function of the whole residual filter cake surface under the action of high-pressure airflow and even the rotation and shoveling action of the blade.
The invention well completes the purging and cleaning of the residual filter cake, has high filter cake removal rate, obviously improves the filtration efficiency and correspondingly prolongs the cycle period of the filtration medium.
2) As a preferable scheme of the scheme, the air blowing knife can utilize high-pressure air to meet an arc-shaped knife back with a certain curvature so as to generate a wall attaching effect, achieve the function of changing the air flow direction, finally give out air along the lower surface of the blade edge, generate an 'prying-up' vortex-shaped air flow force on the residual filter cake from the surface to the inner layer, and pry the residual filter cake layer by layer. Based on the above description, the blade of the present invention may be an arc-shaped blade with a certain curvature as a whole, so as to improve the convenience of use and processing.
3) In practical use, the air knife of the invention can be independently arranged on a certain side shaft or can be directly arranged on a stirring shaft serving as a rotating shaft. During actual assembly, the air source can pass through the inner cavity of the rotating shaft and the scraper overhead cavity to the position of the knife back nozzle due to the actual requirement of the knife back nozzle on high-pressure air flow, so that the high-pressure air flow running function is realized. Meanwhile, due to the special regular triangular platform structure of the scraper frame, on one hand, the edge inclination angle of the scraper frame is 85-89 degrees, so that when the scraper frame rotates, the part close to the center of the rotating shaft can be contacted with materials first, the part far away from the center of the rotating shaft is contacted with the materials later, and the effect of pushing the materials outwards from the center is formed. On the other hand, the front edge height formed by the cooperation of the front side plate and the lower side plate of the scraper rest is lower than the rear edge height formed by the cooperation of the rear side plate and the lower side plate, so that the front inclined layout can be naturally formed when the blade is installed, the scraping function of the blade is ensured, and meanwhile, the back nozzle can be sprayed to the back of the blade at a proper angle after the blade is installed, thereby realizing the wall-along flow effect of high-pressure air flow, and achieving multiple purposes.
4) When the blades are used, the blades are set to be left and right complementary, the back of each blade is provided with a high-pressure gas nozzle to form a plurality of gas blowing surfaces, and the blowing and discharging of the whole residual filter cake surface are completed through left and right complementary, so that the blowing reaction force of the integral structure is reduced.
Drawings
FIG. 1 is an assembled state diagram of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a schematic bottom view of the present invention;
fig. 4 is a schematic view of the working state of the blade.
The actual correspondence between each label and the component name of the invention is as follows:
a-residual cake
10-blade 20-back nozzle 30-rotating shaft
40-doctor blade holder 41-front side plate 42-lower side plate 43-rear side plate
50-bottom nozzle
Detailed Description
For ease of understanding, the specific structure and operation of the present invention will be further described herein with reference to FIGS. 1-4:
in order to protect the filter medium from damage by the scraping mechanism, a gap is usually left between the blade of the scraping mechanism and the filter medium, and the gap is larger for separation equipment with high technical parameters, which is generally 10 mm. Therefore, the residual cake a in the gap is deposited more uniformly on the surface of the filter medium of the separating apparatus, and needs to be removed by other means. Based on the above, the present invention adopts the air-blowing structure as shown in fig. 1-2. The invention can be applied to the structure of the filter press shown in fig. 1, and can be installed on a scraper centrifuge and other separation equipment by proper modification.
In actual design, if high-pressure gas is simply adopted to directly purge residual filter cakes, the effect is poor; the main reason is that the residual filter cake A is the bottommost layer of the filter cake, the compression is larger, and the filter cake is in a harder state. The high pressure gas directly sweeps the filter cake surface, instead compacting to some extent the residual filter cake a, especially the filter cake formed by the compressible material, and thus it is difficult to obtain the desired effect. In order to obtain a good purging effect, the original hardening state of the residual filter cake A is changed to loosen the residual filter cake A; secondly, the high-pressure gas cannot directly purge the surface of the filter cake, but is discharged along the lower surface of the cutting edge of the blade 10, so that the filter cake is pried up layer by layer, and the residual filter cake A is not compacted directly under high pressure; again, pneumatic purging is performed to cover the entire residual cake area and push the purged residual cake a to the discharge outlet. Based on the above, the invention utilizes the wall attaching effect of the blade 10 with a certain curvature, which is encountered by high-pressure gas, so as to change the direction of the air flow, further generate an 'prying' vortex-like air flow force on the residual filter cake A from the surface to the inner layer as shown in fig. 4, finally pry the residual filter cake, and the required complete discharging purpose can be achieved.
More specifically, as shown in fig. 1 to 4, the present invention includes a rotating shaft 30, a wiper blade holder 40, and a blade 10, a back nozzle 20, and a bottom nozzle 50 on the wiper blade holder 40. Wherein: as shown in fig. 2 to 3, the doctor blade holder 40 is divided into a left bracket and a right bracket, and integrally takes a straight-line structure; the left bracket and the right bracket are of regular triangular platform-shaped design structures with wide positions close to the rotating shaft 30 and narrow positions far away from the rotating shaft 30 in overlook view. The included angle beta formed by the edges of the left bracket and the right bracket and the top surface or the bottom surface of the scraper rest 40 is 85-89 degrees, or the included angle beta is 1-5 degrees with a plumb line vertical to the top surface of the scraper rest 40; thus, when the scraper 40 rotates clockwise, the scraper blade contacts the material first near the rotating shaft 30 and then contacts the material second far from the rotating shaft 30, thereby pushing the material outward from the center. And finally, the material reaches a filter cake discharge hole arranged on the side surface of the barrel of the separation equipment, so that the discharging effect is realized. The rotation of the scraper holder 40 is achieved by a power source, such as a power motor or the like, driving the rotary shaft 30 via a transmission system.
The scraper rest 40 has a hollow triangular platform structure, and has light weight and good rigidity. Illustrated in fig. 3-4: the front side plate 41, the rear side plate 43, and the lower side plate 42 constituting the wiper blade holder 40 are welded to each other in a regular triangular table shape, and the wiper blade holder 40 in the regular triangular table shape has a design structure that is wide near the rotation shaft 30 and narrow away from the rotation shaft 30. The bottom end, namely the large end, of the scraper rest 40 is welded with the scraper rest 40, and the small end, namely the top end, is sealed by welding with a sealing plate, so that a closed cavity is formed. In order to reduce friction between the scraping tool rest 40 and the material during scraping, when the left bracket is welded with the scraping tool rest 40, the lower side plate 42 forms an angle alpha with the horizontal plane, generally 8-12 degrees; the right bracket structure is similar to this and will not be described again, but when welded to the doctor bracket 40, the left and right brackets form a circumferentially uniform structure along the axis of the rotary shaft.
The blade 10 has an arc shape with a certain curvature, and the arc opening faces the rotation direction of the scraper holder 40, and may be generally fixed to the front side plate 41 by means of bolts, welding, or the like. The number of the blades 10 may be 5 or more according to the technical parameters of the separating apparatus, and are fixed to the front side plates 41 of the left and right brackets in a certain order. In order to make the stress of each blade 10 smaller when scraping materials, the width of each blade 10 is limited, each blade 10 is only responsible for scraping annular fields with certain sizes, and the blades 10 are staggered and mutually complemented to form a 'complementary' blade layout so as to scrape all materials. The number of complementary blades 10 in fig. 1-3 is six.
In the up-down motion of the lifting assembly, the invention generates lifting motion, thereby normally discharging most materials. Subsequently, to protect the filter medium, a residual cake remains, which can only be removed by means of the high-pressure gas purging according to the invention. For this purpose, high-pressure nozzles, namely, a back nozzle 20 and a bottom nozzle 50, are provided on the back surface of the blade 10 and the bottom surface of the rotating shaft 30. The axis of the back nozzle 20 is at a certain angle with the lower side plate 42 and is at a certain distance from the back of the blade 10, so that the air flow emitted by the back nozzle 20 changes the direction of the air flow when flowing through a cambered surface with a certain curvature on the back of the blade 10, and a 'prying' vortex-shaped air flow force can be formed when the air flow enters the surface of the residual filter cake, so that the residual filter cake is prized, and the residual filter cake is prevented from being compacted by direct blowing of the air flow. In actual manufacturing, the back nozzle 20 may be connected to the lower side plate 42 by a screw connection type, and the distance between the back nozzle 20 and the back of the blade may be properly adjusted by adjusting the screw. A large number of application practices prove that when the curvature k=0.015-0.03 of the blade 13 is in the range of 60-150 mm, the processing difficulty of the blade 13 is small, the air flow generates an adsorption effect after flowing through the curved surface, a certain acceleration is obtained after the air flow deflects, and the air flow 'prying-up' effect is most obvious.
In order to purge the whole residual cake surface by the back nozzle 20, the back of each blade 10 is provided with a corresponding back nozzle 20. The air flow generated by all the knife back nozzles 20 rotates through the rotating shaft 30 to form an annular surface, the stress is limited, and the annular surfaces of all the knife back nozzles 20 are mutually complemented and staggered. In order to prevent the residual filter cake at the bottom of the scraper 40 from forming a purge dead zone, the bottom nozzles 50 disposed at the bottom of the rotary shaft 30 can compensate for the purge dead zone, so that the air flow direction ejected from the bottom nozzles 50 is consistent with the air flow direction ejected from the knife back nozzles 20 at the corresponding sides, that is, all the air flow directions face the rotary direction of the rotary shaft 30. Under the combined action of the air flow generated by the knife back nozzle 20 and the bottom surface nozzle 50, the air flow action range of the invention covers the whole residual filter cake surface, and the residual filter cake A is blown to the discharge valve arranged on the side surface of the barrel of the separation equipment and finally discharged through the filter cake discharge hole.
In practical design, each high-pressure nozzle is a fan-shaped nozzle, the fan-shaped surface is acted on the surface of the residual filter cake by the maximum radian, and the material of the fan-shaped surface can be selected according to the material property.
After the high-pressure nozzle is installed, the internal air passage of the high-pressure nozzle is communicated with the air dividing passage of the lower side plate 42; the hollow space of the scraper holder 40 communicates with the air dividing passage and also communicates with the inner space of the hollow rotary shaft 30. The rotary shaft 30 is a hollow shaft, the top end of the rotary shaft is connected with a rotary joint, and the tail end of the rotary shaft is provided with a left transverse channel and a right transverse channel which are respectively communicated with the left bracket and the right bracket. The gas with certain pressure enters the inner cavity of the rotary shaft 30 through the rotary joint, and enters the back nozzle 20 and the bottom nozzle 50 through the scraper rest 40, so that the air flow spraying and sweeping purpose is finally realized.
The invention can well complete the purging and cleaning of the residual filter cake, the filter cake removal rate is up to more than 80%, the filtration efficiency is improved, and the cycle period of the filter medium is prolonged. By changing the blades 10 with different curvatures, changing the rotation speed and the height of the rotating shaft 30, changing the number of nozzles, changing the gas pressure and other operating parameters, the device can adapt to different residual filter cakes, and has extremely strong material adaptability and remarkable effect.
It will be understood by those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments, but includes other specific forms of the same or similar structures that may be embodied without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.
Claims (6)
1. The utility model provides a residual filter cake of air blow sled formula clears away subassembly, includes air blow sword, this air blow sword is including blade (10) that are used for scraping material, its characterized in that: the blade (10) is in an arc tile shape, and an arc opening of the blade (10) faces to the advancing direction of the blade (10); the air blowing knife further comprises a knife back nozzle (20), wherein the air flow jet direction of the knife back nozzle (20) points to the back surface of the blade (10) so that air flow flows to the cutting edge of the blade (10) along the back surface of the cambered blade (10);
the curvature k of the blade (10) is 0.015-0.03.
2. The residual cake removal assembly of claim 1, wherein: the assembly further comprises a swivel shaft (30) which can perform a swivel action around its own axis; the top of the rotary shaft (30) is provided with a power source for driving the rotary shaft (30) to rotate, the bottom of the rotary shaft (30) is radially extended with a scraper frame (40), and the knife back nozzle (20) is arranged at the scraper frame (40); the scraper frame (40) and the rotary shaft (30) are hollow and are communicated with each other to form a sealing cavity, so that the cavity of the scraper frame (40) is communicated with the inner cavity of the rotary shaft (30) and the spraying cavity of the back nozzle (20).
3. The residual cake removal assembly of claim 2, wherein: the scraper frame (40) is in a regular triangular platform shape with a thin top and a thick bottom, the bottom surface of the scraper frame (40) is fixed at the rotary shaft (30), the air blowing knife is arranged at the front side plate (41) of the scraper frame (40), the knife back nozzle (20) is arranged at the lower side plate (42) of the scraper frame (40), and the front edge height formed by the cooperation of the front side plate (41) and the lower side plate (42) is lower than the rear edge height formed by the cooperation of the rear side plate (43) and the lower side plate (42).
4. A residual cake removal assembly according to claim 3, wherein: the included angle alpha between the lower side plate (42) and the horizontal plane is 8-12 degrees; the included angle beta between each edge of the regular triangular table-shaped scraper frame (40) and the top surface of the prismatic table is 85-89 degrees.
5. The residual cake removal assembly of claim 2 or 3 or 4, wherein: the scraper frames (40) are two groups and are circumferentially and uniformly distributed along the axis of the rotary shaft (30); the air blowing cutters are more than two groups and are sequentially arranged along the length direction of the corresponding scraper rest (40), and the travelling paths of all the air blowing cutters are matched with each other to form a round cleaning surface which is matched with the shape of the filter cake.
6. The residual cake removal assembly of claim 2 or 3 or 4, wherein: the bottom surface of the rotary shaft (30) is provided with bottom surface nozzles (50) communicated with the inner cavity of the rotary shaft (30), and the bottom surface nozzles (50) are more than two groups and are axially symmetrically arranged relative to the axis of the rotary shaft (30); in a plan view parallel to the axis of the rotary shaft (30), the bottom nozzles (50) are arranged in a spiral pattern, and the injection direction of each bottom nozzle (50) is directed in the rotation direction of the rotary shaft (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210260169.5A CN114602230B (en) | 2022-03-16 | 2022-03-16 | Air-blowing prying type residual filter cake removing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210260169.5A CN114602230B (en) | 2022-03-16 | 2022-03-16 | Air-blowing prying type residual filter cake removing assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114602230A CN114602230A (en) | 2022-06-10 |
| CN114602230B true CN114602230B (en) | 2023-09-19 |
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|---|---|---|---|
| CN202210260169.5A Active CN114602230B (en) | 2022-03-16 | 2022-03-16 | Air-blowing prying type residual filter cake removing assembly |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5607588A (en) * | 1995-02-28 | 1997-03-04 | Peterson; John G. | Scraper for scraping filter cake from moving filter medium |
| JPH09141019A (en) * | 1995-11-17 | 1997-06-03 | Shinko Pantec Co Ltd | Filter dryer and agitating blade for the same |
| US6092255A (en) * | 1998-08-11 | 2000-07-25 | Kim; Frank Y. H. | Scraper or squeegee with curved blade surfaces |
| EP1228807A1 (en) * | 2001-02-01 | 2002-08-07 | Krauss-Maffei Process Technology AG | Device and method for scraping a solid cake out of a centrifuge drum |
| CN2748182Y (en) * | 2004-10-29 | 2005-12-28 | 张家港华大离心机制造有限公司 | Filter screen desludging device of centrifuge |
| CN104307777A (en) * | 2014-11-18 | 2015-01-28 | 苏州禾盛新型材料股份有限公司 | Air sac type scraper mechanism for PCM production painting |
| CN210207414U (en) * | 2019-05-18 | 2020-03-31 | 浙江丰明实业有限公司 | Closed scraper |
| CN210303454U (en) * | 2019-04-29 | 2020-04-14 | 河北宏望食品有限公司 | Agitating unit is used in production of instant noodle seasoning |
| CN111391167A (en) * | 2020-03-31 | 2020-07-10 | 李亚 | Secondary granulation hot melting treatment process for recycling plastic products |
| CN111677247A (en) * | 2020-06-18 | 2020-09-18 | 合肥皖兴建设工程有限公司 | Waterproof engineering waterproof paint brushing construction method |
| CN111962000A (en) * | 2020-08-19 | 2020-11-20 | 唐山市佳冠实业有限公司 | Air knife body for air flow adjustable hot-dip galvanized plate production and use method |
| CN113509777A (en) * | 2021-07-12 | 2021-10-19 | 核工业烟台同兴实业集团有限公司 | Air-blowing type scraper for moving disc type filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8985277B2 (en) * | 2012-07-31 | 2015-03-24 | United Technologies Corporation | Case with integral lubricant scavenge passage |
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| US5607588A (en) * | 1995-02-28 | 1997-03-04 | Peterson; John G. | Scraper for scraping filter cake from moving filter medium |
| JPH09141019A (en) * | 1995-11-17 | 1997-06-03 | Shinko Pantec Co Ltd | Filter dryer and agitating blade for the same |
| US6092255A (en) * | 1998-08-11 | 2000-07-25 | Kim; Frank Y. H. | Scraper or squeegee with curved blade surfaces |
| EP1228807A1 (en) * | 2001-02-01 | 2002-08-07 | Krauss-Maffei Process Technology AG | Device and method for scraping a solid cake out of a centrifuge drum |
| CN2748182Y (en) * | 2004-10-29 | 2005-12-28 | 张家港华大离心机制造有限公司 | Filter screen desludging device of centrifuge |
| CN104307777A (en) * | 2014-11-18 | 2015-01-28 | 苏州禾盛新型材料股份有限公司 | Air sac type scraper mechanism for PCM production painting |
| CN210303454U (en) * | 2019-04-29 | 2020-04-14 | 河北宏望食品有限公司 | Agitating unit is used in production of instant noodle seasoning |
| CN210207414U (en) * | 2019-05-18 | 2020-03-31 | 浙江丰明实业有限公司 | Closed scraper |
| CN111391167A (en) * | 2020-03-31 | 2020-07-10 | 李亚 | Secondary granulation hot melting treatment process for recycling plastic products |
| CN111677247A (en) * | 2020-06-18 | 2020-09-18 | 合肥皖兴建设工程有限公司 | Waterproof engineering waterproof paint brushing construction method |
| CN111962000A (en) * | 2020-08-19 | 2020-11-20 | 唐山市佳冠实业有限公司 | Air knife body for air flow adjustable hot-dip galvanized plate production and use method |
| CN113509777A (en) * | 2021-07-12 | 2021-10-19 | 核工业烟台同兴实业集团有限公司 | Air-blowing type scraper for moving disc type filter |
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|---|---|
| CN114602230A (en) | 2022-06-10 |
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