CN202725497U - Omnidirectional airflow wind distributing and material distributing mechanism used for dry method classification - Google Patents
Omnidirectional airflow wind distributing and material distributing mechanism used for dry method classification Download PDFInfo
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- CN202725497U CN202725497U CN 201220369034 CN201220369034U CN202725497U CN 202725497 U CN202725497 U CN 202725497U CN 201220369034 CN201220369034 CN 201220369034 CN 201220369034 U CN201220369034 U CN 201220369034U CN 202725497 U CN202725497 U CN 202725497U
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- wind
- air
- ventilating duct
- pneumatic jig
- sieve
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Abstract
The utility model belongs to the technical field of wind distribution and material distribution, and particularly relates to an omnidirectional airflow wind distributing and material distributing mechanism used for dry method classification. The mechanism comprises a wind sieve arranged on the upper side, a wind supply device for 360-degree omni-circumferential wind distribution is arranged at the lower side of the wind sieve, sieve pores for facilitating wind sent by the wind supply device to blow out are uniformly distributed in the wind sieve, and the upper surface of the wind sieve is in a slant shape for facilitating the slide-down and the dispersion of materials from the wind sieve. The wind sieve of the mechanism is in a cone shape, i.e. a circumferential conical sieve surface is adopted for the mechanism, and compared with single-point material distribution and linear material distribution modes generally adopted by a conventional fluidized bed, the material distribution mode of the conical sieve surface has the advantage that the material distribution area of the fluidized bed can be obviously enlarged so as to help uniform material distribution; and simultaneously the wind supply device for 360-degree omni-circumferential wind distribution is arranged at the lower side of the wind sieve, and the circumferential uniform wind distribution is realized. According to the mechanism disclosed by the utility model, the production capacity is obviously improved, and the classifying, drying and cooling efficiency is improved.
Description
Technical field
The utility model belongs to cloth wind and Strand Feeding Technique field, is specifically related to a kind of full angle air-flow cloth wind, material-feeding mechanism for dry classification.
Background technology
Concerning fluidization, air-distribution device has decisive influence to the fluidized state of whole bed.In the prior art, because air-distribution device design is unreasonable, cause gas cloth wind inhomogeneous, channel occurs easily and produce cloth wind dead band, finally make the bed can not normal fluidization, thereby directly affect the operating efficiency of fluid bed.
In addition, air-distribution device is arranged on the below for aerofoil usually, this moment is owing to the sieve plate shape, for the restriction of aerofoil top sieve pore structure and the reason in cloth wind dead band, fine grained accumulation, clogging will appear inevitably, simultaneously because fluid bed fluidisation area is large, bed surface is wide, generally adopts single-point cloth and linear cloth, produces thus the inhomogeneous phenomenon of cloth; Thickness of bed layer is uneven in addition, thereby wet stock agglomerate so that material can not effectively be disperseed.
The inhomogeneous fluid effect that all will affect fluid bed of cloth wind and cloth, thus the effect of the operations such as classification, drying, cooling further affected, and limited the development of fluid bed dry classification and particle drying, cooling technology.
Summary of the invention
The purpose of this utility model provides a kind of full angle air-flow cloth wind, material-feeding mechanism for dry classification, this cloth wind, material-feeding mechanism be compact conformation not only, and effectively solved the cloth wind of existing fluid bed, the deficiency of Strand Feeding Technique, improved classification and drying efficiency.
For achieving the above object, the utility model has adopted following technical scheme: a kind of full angle air-flow cloth wind, material-feeding mechanism for dry classification, this mechanism comprises the pneumatic jig that is arranged on upside, the downside of pneumatic jig is provided with and is 360 degree loopfuls to the air-supply arrangement of cloth wind, be evenly equipped with the sieve aperture of being convenient to go out from the wind that the air-supply arrangement place sends here on the described pneumatic jig, and the upper surface of pneumatic jig be set to be convenient to material on pneumatic jig landing and disperse skewed.
The utility model can also be able to further realization by following technical measures:
Preferably, described pneumatic jig is coniform, and pneumatic jig by horizontal grating and vertically grating enclose and form; Described vertical grating under the top of coniform pneumatic jig is oblique, be radial cloth be made as a plurality of, described horizontal grating in the form of a ring, and laterally grating longitudinally grating be set to a plurality of from top to bottom.
Further, it is smooth circular-arc that the upper surface of described horizontal grating is, and laterally the incline direction of the upper surface of the incline direction of grating upper surface and pneumatic jig matches.
Preferably, described air-supply arrangement comprises the air feed post of vertical shape, and the revolution center line of the axis of described air feed post and pneumatic jig coincides; The lower end of described air feed post is air intake, and the upper end of air feed post links to each other with the bottom surface of pneumatic jig, and the upper segment column that is positioned at the pneumatic jig masked areas of air feed post is provided with air supply hole with it.
The aperture of described air supply hole is identical, and along hoop be arranged in air feed post week side and the air supply hole that is on the same level direction jointly consist of hoop air supply hole group, described air supply hole group uniformly-spaced is arranged on the shaft of air feed post from top to bottom.
Further, described air-supply arrangement also comprise match with the air feed post so that loopful to the ventilating duct of cloth wind, one end and the air feed post of described ventilating duct are connected, and the air inlet of ventilating duct is connected with described air supply hole, and the end away from air supply hole of ventilating duct also is that the air outlet of ventilating duct is set to the cloth wind gap that consists of between horizontal grating.
Preferably, described ventilating duct is corresponding one by one with air supply hole, and described ventilating duct is the fan shape that is surrounded by dividing plate, and the air inlet place of ventilating duct is provided with and prevents the gasket seal that leaks out, and the end limit at the air outlet place of ventilating duct is resisted against on the bottom surface of described pneumatic jig; The base spacer of ventilating duct that is in upside is all identical with the roof spacer size and shape of the adjacent ventilating duct that is in downside, and this base spacer therewith roof spacer be connected with each other.
As preferred version of the present utility model, the air inlet place of described ventilating duct is provided with the wind-guiding screen of being convenient to realize even distributing wind in the ventilating duct.
Further, described wind-guiding screen is flat tabular, and an end of the close described air supply hole of wind-guiding screen to be a side be that plane, opposite side are the chock shape on inclined-plane, the inclined-plane side of the chock shape end of described wind-guiding screen is set to the barrel medial surface towards ventilating duct.
Further, the plate face of described wind-guiding screen is parallel to each other, and the end away from the air inlet of ventilating duct of wind-guiding screen is mutually concordant; To increasing gradually between the barrel medial surface of ventilating duct, and the length of wind-guiding screen reduces between the barrel medial surface of ventilating duct from the air inlet middle part of ventilating duct the distance between plates of two adjacent air guiding grid plates gradually from the air inlet of ventilating duct middle part.
The utlity model has following beneficial effect:
1), the pneumatic jig in the utility model is coniform, it also is the coniform compass screen surface that the utility model has adopted hoop, single-point cloth and linear distributing mode that this cone shape compass screen surface distributing mode generally adopts compared with traditional fluid bed, can enlarge markedly the cloth area of fluid bed, thereby help to realize uniform distribution; Simultaneously the utility model is provided with at the downside of pneumatic jig and is 360 degree loopfuls to the air-supply arrangement of cloth wind, has realized the hoop even distributing wind.Therefore the utility model so that thickness of feed layer and in machine translational speed can regulate as required, thereby significantly improved production capacity, and improved classification, drying, cooling effectiveness.
2), material at first drops on the upper surface of pneumatic jig from upside, because the upper surface of pneumatic jig is skewed, therefore material drops down along the upper surface of pneumatic jig, material is subject to the wind action that air-supply arrangement sends and bumps when dropping down, therefore in whole cloth process, because fall, the synergy of collision and gas shock so that the wet stock clustered particles can in time obtain disperseing, thereby be that next step drying, graded operation is ready.
3), because the wind speed and direction of hoop air-flow wind is adjustable, so that material just can disperse and fluidisation equably at the friction parts with under than the situation of low gas velocity, thereby the energy consumption of greatly reducing, simultaneously this cloth wind, material-feeding mechanism are also less to the surface damage of material, therefore the utility model can be used for the drying of fragile material, does not also affect working effect when material particles is irregular.
4), because cloth wind of the present utility model, cloth effect are comparatively even, so the material of processing through the utility model can be heated evenly when drying operation, heat exchange is abundant, dry tenacity is high, has higher energy-saving effect compared with common drying machine.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of pneumatic jig.
Fig. 3 is the structural representation of air feed post.
Fig. 4 is the structural representation that air feed post and ventilating duct match.
Fig. 5,6 is the structural representation of ventilating duct.
Fig. 7 is the arrangement states schematic diagram of wind-guiding sieve plate.
Fig. 8 is the structural representation of wind-guiding sieve plate.
The implication of mark is as follows among the figure:
10-pneumatic jig 11-horizontal grating 12-vertical grating 13-cloth wind gap
20-air feed post, 21-air supply hole, 30-ventilating duct, 31-dividing plate
32-end limit, 33-wind-guiding screen, 34-air inlet, 311-roof spacer
332-plane, 312-base spacer, 331-inclined-plane
The specific embodiment
As shown in Figure 1, a kind of full angle air-flow cloth wind, material-feeding mechanism for dry classification, this mechanism comprises the pneumatic jig 10 that is arranged on upside, the downside of pneumatic jig 10 is provided with and is 360 degree loopfuls to the air-supply arrangement of cloth wind, be evenly equipped with the sieve aperture of being convenient to go out from the wind that the air-supply arrangement place sends here on the described pneumatic jig 10, and the upper surface of pneumatic jig 10 is set to be convenient to material landing skewed on pneumatic jig.
Preferably, described pneumatic jig 10 is coniform, and pneumatic jig 10 by horizontal grating 11 and vertically grating 12 enclose and form; Described vertical grating 12 under the top of coniform pneumatic jig 10 is oblique, be radial cloth be made as a plurality of, described horizontal grating 11 in the form of a ring, and laterally grating 11 longitudinally grating 12 arrange from top to bottom.
Further, it is smooth circular-arc that the upper surface of described horizontal grating 11 is, and laterally the incline direction of the upper surface of the incline direction of grating 11 upper surfaces and pneumatic jig 10 matches.
Also namely as shown in Figure 2, described pneumatic jig 10 is the conical compass screen surfaces that surrounded by horizontal grating 11 and vertical grating 12, consists of cloth wind gap 13 between the two adjacent horizontal gratings 11.The cross section of described horizontal grating 11 is smooth fan-shaped cambered surface, described fan-shaped one side contacts with vertical grating 12, fan-shaped another side extends to the outside of pneumatic jig 10, thereby so that laterally the fan-shaped cambered surface of grating 11 is along the oblique lower bending of compass screen surface, this frame mode is conducive to the wet stock agglomerate when avoiding fine to stop up collision disperses.
As shown in Figure 1, the drift angle angle beta of described coniform pneumatic jig 10 is chosen between 60 °～120 ° according to screen length, raw meal particle size demand and wet stock agglomerate content.
Preferably, shown in Fig. 1,3,4, described air-supply arrangement comprises the air feed post 20 of vertical shape, and the revolution center line of the axis of described air feed post 20 and pneumatic jig 10 coincides; The lower end of described air feed post 20 is air intake, and the upper end of air feed post 20 links to each other with the bottom surface of pneumatic jig 10, and the upper segment column that is positioned at pneumatic jig 10 masked areas of air feed post 20 is provided with air supply hole 21 with it.
The aperture of described air supply hole 21 is identical, and is arranged in air feed post 20 all sides and is in that air supply hole 21 on the same level direction is common to consist of hoop air supply hole groups along hoop, and described air supply hole group uniformly-spaced is arranged on the shaft of air feed post 20 from top to bottom.
Shown in Fig. 3,4, the air supply hole 21 of described air feed post 20 on 360 ° of directions of level equiangularly arranged six, the quantity of air supply hole 21 can increase or reduce as required, and described six air supply holes 21 consist of a hoop air supply hole group; Hoop air supply hole group is vertically uniformly-spaced neatly arranged five groups on the shaft of air feed post 20, and the quantity of described hoop air feed post group can increase or reduce as required, thereby improves the uniformity of cloth wind.
Further, described air-supply arrangement also comprise match with air feed post 20 so that loopful to the ventilating duct 30 of cloth wind, one end and the air feed post 20 of described ventilating duct 30 are connected, and the air inlet 34 of ventilating duct 30 is connected with described air supply hole 21, and the end away from air supply hole 21 of ventilating duct 30 also is that the cloth wind gap 13 that the air outlet of ventilating duct 30 is set to consist of between horizontal grating 11 also is sieve aperture.
Preferably, described ventilating duct 30 is corresponding one by one with air supply hole 21, described ventilating duct 30 is the fan shape that is surrounded by dividing plate 31, and the air inlet place of ventilating duct 30 is provided with and prevents the gasket seal that leaks out, and the end limit 32 at the air outlet place of ventilating duct 30 is resisted against on the bottom surface of described pneumatic jig 10; The base spacer of ventilating duct that is in upside is all identical with the roof spacer size and shape of the adjacent ventilating duct that is in downside, and this base spacer therewith roof spacer be connected with each other.
As shown in Figure 6, the upper and lower surface of described ventilating duct 30 is the identical sallop screen of angle, and ventilating duct 30 is bolted on the air feed post 20, and overlapping for air port 21 on the air inlet 34 of ventilating duct 30 and the air feed post 20.
As shown in Figure 6, the specification that is in the ventilating duct 30 on the same horizontal level is identical, and the base spacer 312 of ventilating duct 30 on radical length greater than roof spacer 311, thereby be convenient to realize close contact with skewed compass screen surface.
As preferred version of the present utility model, the air inlet place of described ventilating duct 30 is provided with the wind-guiding screen 33 of being convenient to realize even distributing wind in the ventilating duct.
Further, as shown in Figure 8, described wind-guiding screen 33 is flat tabular, and an end of the close described air supply hole 21 of wind-guiding screen 33 to be a side be that plane, opposite side are the chock shape on inclined-plane, the inclined-plane side of the chock shape end of described wind-guiding screen 33 is set to the barrel medial surface towards ventilating duct 30.
Further, the plate face of described wind-guiding screen 33 is parallel to each other, and the end away from the air inlet of ventilating duct 30 of wind-guiding screen is mutually concordant; To increasing gradually between the barrel medial surface of ventilating duct 30, and the length of wind-guiding screen reduces between the barrel medial surface of ventilating duct 30 from the air inlet middle part of ventilating duct 30 distance between plates of two adjacent air guiding grid plates gradually from the air inlet of ventilating duct 30 middle part.
As shown in Figure 7, described wind-guiding screen 33 places in the ventilating duct 30, the side view of each wind-guiding screen 33 is similar, but the thickness of wind-guiding screen 33 and length are different, and the upper surface that places ventilating duct air inlet 34 1 sides of wind-guiding screen 33 and lower surface are at an angle ramped shaped or chock shape.Because the central speed of the classification wind that is entered by ventilating duct air inlet 34 is large, and the peripheral direction wind speed is little, so the spacing of each wind-guiding screen 33 increases gradually by the middle mind-set both sides of classification wind, thereby classification wind is carried out even distributing wind by the shape of ventilating duct 30.
As shown in Figure 7, the thickness of each wind-guiding screen 33 diminishes between the barrel medial surface of ventilating duct 30 gradually from the air inlet middle part of ventilating duct 30.
Be provided with the stator of strap bolt around described ventilating duct air inlet 34 and air supply hole 21 contact jaws, ventilating duct 30 is connected and fixed by bolt and air feed post 20, adds gasket seal in case leak-stopping wind at stator and air feed post 20 contacted places.
Below in conjunction with Fig. 1 the course of work of the present utility model is described further:
The utility model comprises that cone shape pneumatic jig 10 and 360 degree loopfuls are to the air-supply arrangement of cloth wind.
Cone shape pneumatic jig 10 is by horizontal grating 11 and the vertical tapered compass screen surface that surrounds of grating 12, consists of cloth wind gap 13 between the two adjacent horizontal gratings 11, described pneumatic jig 10 place air-supply arrangement above.
360 degree loopfuls then are to be made of air feed post 20 and ventilating duct 30 to the air-supply arrangement of cloth wind.The epimere of air feed post 20 stretches into the bottom of cone shape pneumatic jig 10, and the upper segment column of air feed post 10 evenly be placed with it equal and opposite in direction and uniformly-spaced arrange from top to bottom air supply hole 21, the utility model adopts six air supply holes 21 in each horizontal direction, and in the vertical direction air supply hole 21 is uniformly-spaced neatly arranged.The upper and lower surface of ventilating duct 30 is the identical sallop screen of angle, and ventilating duct 30 is bolted on the air feed post 20, and ventilating duct, and air supply hole 21 coincides on 30 air inlet 34 and the air feed post 20.
The air inlet place of described ventilating duct 30 is provided with the wind-guiding screen 33 of being convenient to realize even distributing wind in the ventilating duct.Described wind-guiding screen 33 is flat tabular, and it is that plane, opposite side are the chock shape on inclined-plane that an end of the close described air supply hole 21 of wind-guiding screen 33 is a side, and the inclined-plane side of the chock shape end of described wind-guiding screen 33 is set to the barrel medial surface towards ventilating duct 30.
Concrete cloth, cloth wind classification process are as follows:
Material falls from the upside of coniform pneumatic jig 10 because the upper surface of pneumatic jig 10 is skewed, so the wet stock of agglomerate along the upper surface of pneumatic jig 10 drop down and constantly with the compass screen surface collision, with the even distribution of realization material; Simultaneously because 360 degree loopfuls can realize to the comprehensive of pneumatic jig 10 and without the even air feed at dead angle that to the air-supply arrangement of cloth wind so material is subject to the impact of the air-flow that air-supply arrangement sends and obtains further effectively disperseing when dropping down; Setting by the cloth wind gap 13 between the adjacent transverse grating 11, effectively avoided the obstruction of thin material, the size of the total wind supply quantity by regulating 20 inputs of air feed post is to regulate the wind-force size, can effectively solve the bed uneven phenomenon that occurs in the classification process, realized even and efficient cloth wind, cloth, ready for realizing next step high-effective classifying to material.
Claims (10)
1. full angle air-flow cloth wind, material-feeding mechanism that is used for dry classification, it is characterized in that: this mechanism comprises the pneumatic jig (10) that is arranged on upside, the downside of pneumatic jig (10) is provided with and is 360 degree loopfuls to the air-supply arrangement of cloth wind, be evenly equipped with the sieve aperture of being convenient to go out from the wind that the air-supply arrangement place sends here on the described pneumatic jig (10), and the upper surface of pneumatic jig (10) be set to be convenient to material on pneumatic jig landing and disperse skewed.
2. full angle air-flow cloth wind, material-feeding mechanism for dry classification according to claim 1, it is characterized in that: described pneumatic jig (10) is coniform, and pneumatic jig (10) by horizontal grating (11) and vertically grating (12) enclose and form; Described vertical grating (12) under the top of coniform pneumatic jig (10) is oblique, be radial cloth be made as a plurality of, described horizontal grating (11) in the form of a ring, and laterally grating (11) longitudinally grating (12) be set to a plurality of from top to bottom.
3. full angle air-flow cloth wind, material-feeding mechanism for dry classification according to claim 2, it is characterized in that: the upper surface of described horizontal grating (11) is smooth circular-arc, and laterally the incline direction of the upper surface of the incline direction of grating (11) upper surface and pneumatic jig (10) matches.
4. according to claim 2 or 3 described full angle air-flow cloth wind, material-feeding mechanisms for dry classification, it is characterized in that: described air-supply arrangement comprises the air feed post (20) of vertical shape, and the revolution center line of the axis of described air feed post (20) and pneumatic jig (10) coincides; The lower end of described air feed post (20) is air intake, and the upper end of air feed post (20) links to each other with the bottom surface of pneumatic jig (10), and the upper segment column that is positioned at pneumatic jig (10) masked areas of air feed post (20) is provided with air supply hole (21) with it.
5. full angle air-flow cloth wind, material-feeding mechanism for dry classification according to claim 4, it is characterized in that: described air-supply arrangement also comprise match with air feed post (20) so that loopful to the ventilating duct (30) of cloth wind, one end of described ventilating duct (30) and air feed post (20) are connected, and the air inlet of ventilating duct (30) is connected with described air supply hole (21), and the end away from air supply hole (21) of ventilating duct (30) also is that the cloth wind gap that the air outlet of ventilating duct (30) is set to consist of between horizontal grating (11) also is sieve aperture.
6. full angle air-flow cloth wind, material-feeding mechanism for dry classification according to claim 4, it is characterized in that: the aperture of described air supply hole (21) is identical, and be arranged in all sides of air feed post (20) and the air supply hole (21) that is on the same level direction consists of hoop air supply hole group jointly along hoop, described air supply hole group uniformly-spaced is arranged on the shaft of air feed post (20) from top to bottom.
7. full angle air-flow cloth wind, material-feeding mechanism for dry classification according to claim 5, it is characterized in that: described ventilating duct (30) is corresponding one by one with air supply hole (21), described ventilating duct (30) is the fan shape that is surrounded by dividing plate (31), the air inlet place of ventilating duct (30) is provided with and prevents the gasket seal that leaks out, and the end limit (32) at the air outlet place of ventilating duct (30) is resisted against on the bottom surface of described pneumatic jig (10); The base spacer of ventilating duct that is in upside is all identical with the roof spacer size and shape of the adjacent ventilating duct that is in downside, and this base spacer therewith roof spacer be connected with each other.
8. it is characterized in that according to claim 5 or 7 described full angle air-flow cloth wind, material-feeding mechanisms for dry classification: the air inlet place of described ventilating duct (30) is provided with the wind-guiding screen (33) of being convenient to realize even distributing wind in the ventilating duct.
9. full angle air-flow cloth wind, material-feeding mechanism for dry classification according to claim 8, it is characterized in that: described wind-guiding screen (33) is flat tabular, and it is that plane, opposite side are the chock shape on inclined-plane that an end of the close described air supply hole (21) of wind-guiding screen (33) is a side, and the inclined-plane side of the chock shape end of described wind-guiding screen (33) is set to the barrel medial surface towards ventilating duct (30).
10. full angle air-flow cloth wind, material-feeding mechanism for dry classification according to claim 9, it is characterized in that: the plate face of described wind-guiding screen (33) is parallel to each other, and an end of the air inlet away from ventilating duct (30) of wind-guiding screen (33) (34) is mutually concordant; To increasing gradually between the barrel medial surface of ventilating duct (30), and the length of wind-guiding screen (33) reduces between the barrel medial surface of ventilating duct (30) from the air inlet middle part of ventilating duct (30) distance between plates of two adjacent air guiding grid plates gradually from the air inlet of ventilating duct (30) middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220369034 CN202725497U (en) | 2012-07-27 | 2012-07-27 | Omnidirectional airflow wind distributing and material distributing mechanism used for dry method classification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220369034 CN202725497U (en) | 2012-07-27 | 2012-07-27 | Omnidirectional airflow wind distributing and material distributing mechanism used for dry method classification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202725497U true CN202725497U (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220369034 Withdrawn - After Issue CN202725497U (en) | 2012-07-27 | 2012-07-27 | Omnidirectional airflow wind distributing and material distributing mechanism used for dry method classification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202725497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825009A (en) * | 2012-07-27 | 2012-12-19 | 安徽理工大学 | 360-degree airflow air and material distributing mechanism for dry classification |
| CN105170025A (en) * | 2015-06-24 | 2015-12-23 | 杭州化工机械有限公司 | Tower bottom rotation fluidized bed |
-
2012
- 2012-07-27 CN CN 201220369034 patent/CN202725497U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825009A (en) * | 2012-07-27 | 2012-12-19 | 安徽理工大学 | 360-degree airflow air and material distributing mechanism for dry classification |
| CN102825009B (en) * | 2012-07-27 | 2014-07-16 | 安徽理工大学 | 360-degree airflow air and material distributing mechanism for dry classification |
| CN105170025A (en) * | 2015-06-24 | 2015-12-23 | 杭州化工机械有限公司 | Tower bottom rotation fluidized bed |
| CN105170025B (en) * | 2015-06-24 | 2017-05-24 | 杭州化工机械有限公司 | Tower bottom rotation fluidized bed |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130213 Effective date of abandoning: 20140716 |
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| RGAV | Abandon patent right to avoid regrant |