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WO2015146181A1 - Bac de sédimentation - Google Patents

Bac de sédimentation Download PDF

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Publication number
WO2015146181A1
WO2015146181A1 PCT/JP2015/001735 JP2015001735W WO2015146181A1 WO 2015146181 A1 WO2015146181 A1 WO 2015146181A1 JP 2015001735 W JP2015001735 W JP 2015001735W WO 2015146181 A1 WO2015146181 A1 WO 2015146181A1
Authority
WO
WIPO (PCT)
Prior art keywords
raw water
plate
tank body
inflow pipe
tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/001735
Other languages
English (en)
Japanese (ja)
Inventor
雄二郎 大庭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP2016510048A priority Critical patent/JP6165968B2/ja
Publication of WO2015146181A1 publication Critical patent/WO2015146181A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B01D21/04—Settling tanks with single outlets for the separated liquid with moving scrapers
    • B01D21/06—Settling tanks with single outlets for the separated liquid with moving scrapers with rotating scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B01D21/0045—Plurality of essentially parallel plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2405—Feed mechanisms for settling tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2427—The feed or discharge opening located at a distant position from the side walls

Definitions

  • Embodiment of this invention is related with a sedimentation tank.
  • a mechanism for changing the raw water flowing out from the bottom of the sedimentation tank into a uniform upward flow is required.
  • a structure in which a structure is installed below the feed well and the flow of water is changed is generally used (see Patent Document 2).
  • a plate is disposed below the feed well, and the plate causes the raw water to form a collision jet on the upper surface of the plate and flow out in the horizontal direction. Thereafter, the main flow forms an upward flow on the tank wall surface and flows out through the inclined plate.
  • the raw water outflow angle is in the horizontal direction, it is difficult to generate sludge at the bottom of the sedimentation tank, and the effect of improving the quality of the treated water is obtained, and at the same time, the raw water outflow part is set at a lower position, The effect of enabling the height to be reduced is obtained. Further, since the mainstream passes near the tank wall surface, the inclined plate installed only near the tank wall surface has a greater effect and suppresses the leakage of suspended solids.
  • the impinging jet on the upper surface of the plate forms a local high-speed flow near the plate.
  • the rising flow velocity at the tank wall surface is increased, the substantial residence time is reduced, and the quality of the treated water is deteriorated.
  • the high-speed jet near the bottom of the sedimentation tank has the property of drawing in the surrounding fluid, so that sludge is likely to roll up at the bottom of the sedimentation tank.
  • This impinging jet velocity is determined only by the treatment flow rate and the feedwell diameter when the distance between the bottom of the feedwell and the plate is more than a certain distance, so the flow velocity is finely adjusted according to the tank diameter and treatment flow rate. It is impossible to do.
  • the problem to be solved by the present invention is to reduce the rising rate of raw water on the tank wall surface without causing sludge winding in the inflow pipe and the sedimentation tank having a plate below the inflow pipe, and It is to increase the quality of treated water by increasing time.
  • the sedimentation tank of the embodiment is disposed so as to be parallel to the wall surface of the tank body in the central part of the tank body, the inflow pipe for supplying raw water into the tank body, and the inflow A raw water distribution mechanism composed of a plurality of plates disposed below the pipe. Except for the plate located at the lowermost end, the plurality of plates are formed with an opening centered on the axis of the inflow pipe, and the size of the opening changes from the upper plate to the lower plate. It gradually narrows as it goes.
  • FIG. 4 is a partially enlarged view of a plurality of inclined plates arranged in the circumferential direction of the settling tank (tank body) shown in FIG. 3 when viewed from above.
  • FIG. 4 is a partially enlarged view of a plurality of inclined plates arranged in the circumferential direction of the settling tank (tank body) shown in FIG. 3 when viewed from above.
  • FIG. 1 is a cross-sectional view showing a schematic configuration of a sedimentation tank in the present embodiment
  • FIG. 2 is an enlarged view showing a region in the vicinity of the lower portion of the inflow pipe of the sedimentation tank shown in FIG.
  • the sedimentation tank 10 of the present embodiment includes a tank body 11, an inflow pipe 12 disposed so as to be parallel to the wall surface 11 ⁇ / b> A of the tank body 11, in the central portion of the tank body 11, A raw water distribution mechanism 13 disposed below the inflow pipe 12. That is, the axis of the inflow pipe 12 is disposed so as to coincide with the axis of the tank body 11.
  • the outer shape of the wall surface of the tank body when the tank body 11 is viewed in plan may be circular, or a rectangular shape such as a square or a rectangle. There may be. Further, it may be a pentagon or more polygonal shape. Therefore, the three-dimensional shape of the tank body 11 is a columnar shape or a polygonal column shape. As will be described later, since it is preferable that the raw water flows uniformly in the tank body 11 in order to allow the flocs to settle efficiently, a circular shape is a perfect circle, and a polygonal shape is a positive shape. A polygonal outer shape is more preferable.
  • the bottom of the tank body has a shape in which the center of the bottom of the shape is recessed so that the sediment can be settled and recovered efficiently.
  • a shape in which a conical shape or a polygonal pyramid shape is turned upside down and the center of the bottom is the apex of the cone and the lowermost portion is more preferable.
  • the discharge port 11B is provided in the lowest part of the bottom part of this tank body so that sediment can be discharged
  • size of the tank 11 can be arbitrarily adjusted according to the quantity of the raw water which should be processed.
  • Examples of the size of the tank body 11 include those having a capacity of 20 to 530 m 3 , an inner diameter of 3 to 15 m, and a height of 2 to 4 m.
  • the inflow pipe 12 is arranged in the central portion of the tank body 11 so as to be parallel to the wall surface of the tank body 11, and the raw water supplied from the inflow pipe 12 is axially below the tank body 11 from the inflow pipe 12. And is supplied into the tank body 11. That is, the inflow pipe 12 is positioned at the center of the outer shape of the tank body 11 in the outer shape of the wall surface when the tank body 11 is viewed in plan, and feeds raw water toward the bottom of the tank body 11. Provided.
  • the inflow pipe 12 is preferably provided at a position lower than the central portion in the height direction of the tank body 11. By providing it at a position lower than the central portion, it is possible to sufficiently disperse raw water, which will be described later, and to form an upward flow after dispersion.
  • the diameter of the inflow pipe 12 depends on the supply amount of raw water, and may be appropriately selected depending on the size of the tank body 11 and the like. As this diameter, for example, a pipe having an inner diameter of 0.1 to 0.4 times the inner diameter of the tank body 11 is preferable.
  • a raw water supply pipe 14 for supplying raw water from the outside is connected to the inflow pipe 12, and a scraping shaft 15 is disposed at the center of the inflow pipe 12.
  • the scraping shaft 15 is configured to rotate in a direction indicated by an arrow at an upper center portion of the tank body 11 in FIG. 1 by a drive mechanism (not shown). Further, the scraping shaft 15 is connected to a support plate 16 positioned below the scraping shaft 15, and a plurality of scraping plates 17 are suspended from the support plate 16 toward the lower side (the bottom of the tank body 11). .
  • the scraping shaft 15, the support plate 16 and the scraping plate 17 constitute a scraping mechanism.
  • the sediment after the raw water treatment is scraped to the discharge port 11 ⁇ / b> B located at the bottom center of the tank body 11.
  • the sediment can be discharged to the outside of the tank body 11 from the discharge port 11B.
  • an overflow weir 18 and a discharge pipe 19 are disposed above the tank body 11.
  • the raw water distribution mechanism 13 disperses the raw water supplied from the supply pipe 12 in the horizontal direction, and is preferably configured to disperse evenly.
  • FIG. 2 shows an example of the raw water distribution mechanism 13.
  • the raw water distribution mechanism 13 includes a circular first plate 131, a circular second plate 132, and a circular third plate 133 having the same outer shape.
  • the first plate 131 is formed with a first opening 131A
  • the second plate 132 is formed with a second opening 132A, each of which has an annular shape.
  • the diameter of the first opening 131A is larger than the diameter of the first opening 132A, and these openings are formed concentrically around the axis of the inflow pipe 12, that is, the scraping shaft 15.
  • the outer diameters of the first plate 131, the second plate 132, and the third plate 133 are not less than the diameter of the inflow pipe 12, and are preferably 1 to 3 times the diameter of the inflow pipe 12.
  • the diameter of the first opening 131A provided in the first plate 131 can be, for example, 0.7 to 0.8 times the diameter of the inflow pipe 12, and the first plate 131 provided in the second plate 132 has a diameter of 0.7 to 0.8.
  • the diameter of the second opening 132A can be 0.5 to 0.6 times the diameter of the inflow pipe 12. Therefore, the diameter of the second opening 132A is smaller than the diameter of the first opening 131A.
  • the flow rate of the supplied raw water collides with each plate in order from the outer peripheral side by sequentially reducing the diameter of the opening from the upper plate to the lower plate. It will be.
  • the raw water colliding with the plate is evenly distributed in the horizontal direction on the outer peripheral side.
  • distribution is performed in steps by each plate, there is little load compared with making it collide at a time and changing the flow of raw
  • the third plate 133 has no opening, but an opening smaller than the second opening 132A can be formed.
  • the raw water that collided with the plate is evenly distributed in the horizontal direction on the outer peripheral side, and gradually dispersed in the horizontal direction by being performed stepwise on each plate.
  • the load can be released downward when the flow rate at the time of dispersion increases, such as when the amount of treated water is large.
  • the first plate 131, the second plate 132, and the third plate 133 are held and fixed by a holding member (not shown) so that each has a predetermined positional relationship. Further, the raw water distribution mechanism 13 is also important in the positional relationship with the inflow pipe 12, and is arranged and fixed so that the centers (axes) thereof coincide with each other in the vertical direction. Therefore, the raw water distribution mechanism 13 is preferably fixed to the inflow pipe 12.
  • the above-described raw water distribution mechanism 13 is composed of three plates, but it is also possible to disperse the raw water finely stepwise by providing more plates. At this time, the number of plates is preferably about 3 to 5.
  • natural water is disperse
  • a region where the upward flow is generated is a sedimentation separation portion, and a region where the downward flow is generated is a sludge retention portion.
  • the sediment separation part and the sludge retention part are divided by a horizontal plane at the position where the raw water distribution mechanism 13 is provided, and the area above the horizontal plane is the sedimentation separation part, and the area below the horizontal plane is the sludge retention part. You can also.
  • the tank body 11, the inflow pipe 12, the raw water distribution mechanism 13 and the like constituting the precipitation tank 10 can be made of any material, and when handling corrosive raw water, it is made of a material such as stainless steel or plastic. It is preferable to use stainless steel particularly when strength is required.
  • the raw water descending in the vicinity of the wall surface 12 ⁇ / b> A of the inflow pipe 12 first collides with the outer peripheral surface 131 ⁇ / b> B of the first plate 131 located at the uppermost stage of the raw water distribution mechanism 13, and hits the wall surface 11 ⁇ / b> A of the tank body 11. It begins to flow horizontally toward.
  • the raw water descending near the middle between the wall surface 12 ⁇ / b> A of the inflow pipe 12 and the axis of the inflow pipe 12 collides with the outer peripheral surface 132 ⁇ / b> B of the second plate 132 located in the middle stage of the raw water distribution mechanism 13. It flows out horizontally toward the wall surface 11A.
  • the raw water descending near the axis of the inflow pipe 12 collides with the main surface 133B of the third plate 133 located at the lowest stage of the raw water distribution mechanism 13 and flows out horizontally toward the wall surface of the tank body 11. To do.
  • the raw water that has descended the inflow pipe 12 collides with a plate disposed below the inflow pipe 12 at a time and flows out in the horizontal direction. Instead, it is distributed in the vertical direction by the plurality of plates 131, 132 and 133 constituting the raw water distribution mechanism 13, and flows out in the horizontal direction stepwise at different heights.
  • the raw water distribution can be performed by appropriately adjusting the number and interval of the plates in the raw water distribution mechanism 13 and the size of the opening.
  • the flow rate of the raw water distributed in the horizontal direction from the mechanism 13 and the raw water rising along the wall surface 11A of the tank body 11 can be finely adjusted. For example, the number and interval of the plates in the raw water distribution mechanism 13 are increased, and the size of the opening is gradually reduced from the upper plate toward the lower plate, and is distributed horizontally in each plate.
  • the flow velocity can be finely adjusted (reduced) according to the size of the tank body 11, that is, the sedimentation tank 10, and the amount of treated water.
  • the amount of raw water distributed by each plate is approximately the same.
  • the raw water that has risen along the wall surface 11A of the tank body 11 is overflowed as treated water. 18 is discharged to the outside through the discharge pipe 19.
  • the suspended matter separated and removed in the sedimentation tank 10 accumulates at, for example, the bottom of the tank body 11, that is, the bottom of the sedimentation tank 10, and the scraping shaft 15 of the scraping mechanism is rotated in the direction indicated by the arrow in the figure.
  • the scraping plate 17 is scraped to the center of the bottom. And this settled floating substance is discharged
  • the raw water containing suspended solids supplied into the sedimentation tank 10 is settled, and only the treated water from which the suspended solids are efficiently separated and removed is discharged from the discharge pipe 19 of the sedimentation tank 10. Will be able to get from.
  • FIG. 3 is a cross-sectional view showing a schematic configuration of the sedimentation tank in the present embodiment
  • FIG. 4 shows a plurality of inclined plates arranged in the circulation direction of the sedimentation tank (tank body) shown in FIG.
  • FIG. 5 is a partially enlarged view when seen from the center
  • FIG. 5 is a partially enlarged view when a plurality of inclined plates arranged in the circulation direction of the settling tank (tank body) shown in FIG. 3 is seen from above.
  • FIG. 3 is a cross-sectional view showing a schematic configuration of the sedimentation tank in the present embodiment
  • FIG. 4 shows a plurality of inclined plates arranged in the circulation direction of the sedimentation tank (tank body) shown in FIG.
  • FIG. 5 is a partially enlarged view when seen from the center
  • FIG. 5 is a partially enlarged view when a plurality of inclined plates arranged in the circulation direction of the settling tank (tank body) shown in FIG. 3 is seen from above.
  • FIG. 3 is a cross-
  • a plurality of inclined plates 25 are arranged on the wall surface 11 ⁇ / b> A of the tank body 11 in the circumferential direction with respect to the sedimentation tank 10 of the first embodiment. Different points are set. Further, an area of the inclined plate 25 that is in contact with and fixed to the wall surface 11A of the tank body 11 is disposed so as to form an angle ⁇ with the horizontal direction.
  • the vicinity of the wall surface 12A of the inflow pipe 12 descends.
  • the raw water that has fallen near the middle of the wall surface 12A of the inflow pipe 12 and the axis of the inflow pipe 12 and the raw water that has descended near the axis of the inflow pipe 12 are respectively
  • the outer peripheral surface 131B of the first plate 131 located in the upper stage, the outer peripheral surface 132B of the second plate 132 located in the middle stage of the raw water distribution mechanism 13, and the third plate 133 located in the lowermost stage of the raw water distribution mechanism 13 Collides with main surface 133B.
  • the distributed raw water flows horizontally toward the wall surface of the tank body 11 and then rises along the wall surface 11A of the tank body 11, the raw water collides with the inclined plate 25. To come.
  • a local high-speed flow is not formed on the surface of each plate of the raw water distribution mechanism 13. Furthermore, in addition to the substantial increase in residence time due to the suppression of the increase in speed of the rising flow velocity when the raw water rises along the wall surface 11A of the tank body 11, the raw water comes to collide with the inclined plate 25. Floating substances in the raw water can be separated and removed more effectively, and the quality of the treated water can be maintained in a good state.
  • the angle ⁇ between the region where the inclined plate 25 shown in FIG. 4 is in contact with and fixed to the wall surface 11A of the tank body 11 and the horizontal direction can be 45 to 80 degrees, for example.
  • the width L can be 5 to 30% of the radius of the tank body 11, and the height H can be 10 to 50% of the height of the tank body 11.
  • the inclined plate 25 can be in any form such as a corrugated plate member in addition to a rectangular plate member.
  • FIG. 6 is a cross-sectional view showing a schematic configuration of the sedimentation tank in the present embodiment
  • FIG. 7 is an enlarged view showing a region in the vicinity of the lower part of the inflow pipe of the sedimentation tank shown in FIG.
  • interval of the several plate which comprises the raw
  • the difference is that an interval control mechanism 35 is provided.
  • the plate interval control mechanism 35 is a fixing jig 351 for fixing the lowermost third plate 133 disposed at the lower end of the scraping shaft 15, and an outer peripheral surface of the third plate 133. , And a pair of threaded shafts 352 disposed at opposite positions.
  • Screw threads are formed on the entire side surface of the threaded shaft 352 or in the vicinity of the first plate 131 and the second plate 132 where the first plate 131 and the second plate 132 are screwed.
  • the screw holes 131C and 132C provided are meshed with each other.
  • the first plate 131 and the second plate 132 are screwed to the threaded shaft 352, and the threaded shaft 352 is rotated, so that the space between the first plate 131 and the second plate 132 is increased.
  • the relative position, or the relative position of the first plate 131 and / or the second plate 132 with the third plate 133 can be controlled.
  • the plate interval control mechanism 35 of the present embodiment the interval between the three plates constituting the raw water distribution mechanism 13 can be adjusted.
  • the said flow rate is adjusted finely according to the magnitude

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

L'objet de la présente invention est, dans un bac de sédimentation comprenant une conduite d'admission et des plaques sous la conduite d'admission, de réduire le taux d'élévation d'eau brute au niveau des surfaces de paroi du bac sans donner lieu à un soulèvement des boues, d'augmenter le temps de rétention de l'eau brute et d'améliorer ainsi la qualité de l'eau traitée. Un bac de sédimentation selon un mode de réalisation est pourvu d'un corps de bac, d'une conduite d'admission (12) disposée dans la partie centrale du corps de bac de manière à être parallèle aux surfaces de paroi du corps de bac pour l'alimentation en eau brute à l'intérieur du corps de bac, et d'un mécanisme de distribution d'eau brute (13) disposé sous la conduite d'admission (12) et formé d'une pluralité de plaques (131, 132, 133). À l'exception de la plaque (133) positionnée sur l'extrémité la plus basse, des parties d'ouverture (131A, 132A) sont formées en prenant l'axe de la conduite d'admission (12) comme centre dans la pluralité de plaques, et la taille des parties d'ouverture se réduit progressivement de la plaque latérale supérieure à la plaque latérale inférieure.
PCT/JP2015/001735 2014-03-26 2015-03-26 Bac de sédimentation Ceased WO2015146181A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016510048A JP6165968B2 (ja) 2014-03-26 2015-03-26 沈殿漕

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014064573 2014-03-26
JP2014-064573 2014-03-26

Publications (1)

Publication Number Publication Date
WO2015146181A1 true WO2015146181A1 (fr) 2015-10-01

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PCT/JP2015/001735 Ceased WO2015146181A1 (fr) 2014-03-26 2015-03-26 Bac de sédimentation

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JP (2) JP6165968B2 (fr)
WO (1) WO2015146181A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016059797A1 (fr) * 2014-10-15 2016-04-21 株式会社 東芝 Cuve de décantation et procédé de sédimentation
JP2019126770A (ja) * 2018-01-24 2019-08-01 株式会社西原環境 固液分離装置
JP2020089845A (ja) * 2018-12-06 2020-06-11 株式会社東芝 沈殿槽
CN112206574A (zh) * 2020-10-12 2021-01-12 湖南创大玉兔化工有限公司 一种cn过滤器内代替玻璃钢材料固定斜板的方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735365Y2 (fr) * 1977-04-12 1982-08-05
JPS6274414A (ja) * 1985-09-30 1987-04-06 Ina Shokuhin Kogyo Kk 改良された掻寄板を有するシツクナ
JP2004530554A (ja) * 2001-06-25 2004-10-07 オウトクンプ　オサケイティオ　ユルキネン スラリを清澄化および／または濃縮する方法および装置
JP2007069189A (ja) * 2005-09-09 2007-03-22 Kurita Water Ind Ltd 沈殿槽
JP2012066249A (ja) * 2012-01-06 2012-04-05 Kurita Water Ind Ltd 沈殿槽
JP2012239944A (ja) * 2011-05-16 2012-12-10 Yoshikazu Shoda 遠心沈殿分離装置

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JPS507576Y2 (fr) * 1971-08-23 1975-03-06
JPS4858653A (fr) * 1971-11-11 1973-08-17
JP4254426B2 (ja) * 2003-08-27 2009-04-15 栗田工業株式会社 沈殿槽装置
CA2672004C (fr) * 2009-07-14 2012-03-27 Imperial Oil Resources Limited Materiel d'alimentation pour recipient de separation solides- liquides

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735365Y2 (fr) * 1977-04-12 1982-08-05
JPS6274414A (ja) * 1985-09-30 1987-04-06 Ina Shokuhin Kogyo Kk 改良された掻寄板を有するシツクナ
JP2004530554A (ja) * 2001-06-25 2004-10-07 オウトクンプ　オサケイティオ　ユルキネン スラリを清澄化および／または濃縮する方法および装置
JP2007069189A (ja) * 2005-09-09 2007-03-22 Kurita Water Ind Ltd 沈殿槽
JP2012239944A (ja) * 2011-05-16 2012-12-10 Yoshikazu Shoda 遠心沈殿分離装置
JP2012066249A (ja) * 2012-01-06 2012-04-05 Kurita Water Ind Ltd 沈殿槽

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016059797A1 (fr) * 2014-10-15 2016-04-21 株式会社 東芝 Cuve de décantation et procédé de sédimentation
JP2019126770A (ja) * 2018-01-24 2019-08-01 株式会社西原環境 固液分離装置
JP7083650B2 (ja) 2018-01-24 2022-06-13 株式会社西原環境 固液分離装置
JP2020089845A (ja) * 2018-12-06 2020-06-11 株式会社東芝 沈殿槽
CN112206574A (zh) * 2020-10-12 2021-01-12 湖南创大玉兔化工有限公司 一种cn过滤器内代替玻璃钢材料固定斜板的方法
CN112206574B (zh) * 2020-10-12 2022-11-25 湖南创大玉兔化工有限公司 一种cn过滤器内代替玻璃钢材料固定斜板的方法

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JP6165968B2 (ja) 2017-07-19
JP2017154140A (ja) 2017-09-07
JP6325722B2 (ja) 2018-05-16
JPWO2015146181A1 (ja) 2017-04-13

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