WO2008038335A1 - Appareil de récupération de contenu solide et procédé de récupération de contenu solide - Google Patents

Appareil de récupération de contenu solide et procédé de récupération de contenu solide Download PDF

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Publication number
WO2008038335A1
WO2008038335A1 PCT/JP2006/319002 JP2006319002W WO2008038335A1 WO 2008038335 A1 WO2008038335 A1 WO 2008038335A1 JP 2006319002 W JP2006319002 W JP 2006319002W WO 2008038335 A1 WO2008038335 A1 WO 2008038335A1
Authority
WO
WIPO (PCT)
Prior art keywords
solid content
wet cake
filter
rotary valve
discharge
Prior art date
Application number
PCT/JP2006/319002
Other languages
English (en)
Japanese (ja)
Inventor
Akio Yamashita
Akira Fujiwara
Takumi Kaneko
Original Assignee
Mitsubishi Kakoki Kaisha, Ltd.
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 Mitsubishi Kakoki Kaisha, Ltd. filed Critical Mitsubishi Kakoki Kaisha, Ltd.
Priority to CN2006800541858A priority Critical patent/CN101415476B/zh
Priority to JP2008536216A priority patent/JPWO2008038335A1/ja
Priority to PCT/JP2006/319002 priority patent/WO2008038335A1/fr
Publication of WO2008038335A1 publication Critical patent/WO2008038335A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/76—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes

Definitions

  • the present invention relates to a solid content recovery apparatus and a solid content recovery method, and more specifically, for example, pressurizing and filtering a solid content obtained by pressurizing and filtering a slurry containing solid content such as crystals.
  • the present invention relates to a solid content recovery apparatus and a solid content recovery method that can be smoothly taken out under atmospheric pressure.
  • Patent Document 1 As a conventional technique of this type, for example, a technique described in Patent Document 1 is known.
  • the technique described in Patent Document 1 relates to a method and apparatus for recovering crystals from a slurry, and its main part is generally configured as shown in FIG.
  • a conventional crystal recovery apparatus for example, as shown in FIG.
  • the pressurizing filter 1 includes a slurry reservoir 1B connected to a slurry supply pipe 1A, and an entire circumference partly immersed in the slurry reservoir 1B.
  • a rotary drum 1C having a filter medium on its surface, a housing 1D surrounding the rotary drum 1C and forming a pressurized space with a slurry reservoir 1B, and a pressurized gas (inert gas such as nitrogen) connected to the housing 1D
  • a stripping means (not shown) for stripping the cake, and discharging the wet cake to the rotary valve 2 as shown by the white arrow in the cake discharge path 1F connected to the housing 1D.
  • the pressure filter includes a pipe for collecting the filtrate in the rotating drum 1C and a cleaning means for cleaning the wet cake
  • the rotary valve 2 is disposed between the pressurizing filter 1 and the dryer under atmospheric pressure, and maintains the airtightness in the housing 1C of the pressurizing filter 1 while maintaining the airtightness. Remove the wet cake from the filter 1 to the atmospheric pressure side.
  • Patent Document 2 a technique described in Patent Document 2 is known.
  • the technology of Patent Document 2 relates to a method and apparatus for recovering crystals from a slurry, and this apparatus is generally configured as shown in FIG.
  • Pressurizing filter 11 that pressurizes and filters slurry S to obtain a wet cake, first rotary valves 12 and 12 that take out the wet cake from this pressurizing filter 11, and these first rotary valves
  • the buffer tanks 13 and 13 for temporarily storing the wet cake taken out at 12 and 12, the boosters 14 and 14 for adjusting the pressure in the buffer tanks 13 and 13 to atmospheric pressure, and the boosters 14 and 14 And second rotary valves 15 and 15 for taking out the wet cake from the buffer tanks 13 and 13 adjusted to the atmospheric pressure.
  • the pressurizing filter 11 is configured according to the one shown in FIG. 2, the corresponding parts are designated by numbers in the 10s and their description is omitted.
  • Reference numeral 16 denotes a first screw conveyor
  • 17 denotes a second screw conveyor
  • 18 denotes a pipe connecting the housing 11D and the booster 14.
  • the second rotary valves 15 and 15 are configured to discharge the wet cake from the buffer tank 13 adjusted to a substantially atmospheric pressure by the boosters 14 and 14 to the atmosphere side while maintaining airtightness. Yes. For this reason, there is no possibility of adversely affecting equipment such as a dryer installed on the downstream side where the gas in the pressurized filter 11 does not leak to the downstream side of the second rotary valves 15 and 15. In addition, since the leaked gas is reused, the amount of inert gas used for pressurization can be saved.
  • Patent Document 1 JP-A-11 179115
  • Patent Document 2 JP-A-2005-118754
  • the first rotary valve 12 and 12 and the second rotary valve 15 and 15 are both of the pressure filter 11.
  • the first rotary valves 12 and 12 are also enlarged, and the space blockage of the first rotary valves 12 and 12 is reduced.
  • the power costs of the boosters 14 and 14 for adjusting the internal pressure to atmospheric pressure increased, there was a problem.
  • the present invention has been made to solve the above-described problems, and prevents gas leakage from the pressurized filter to the low pressure side, saving power costs and adding the pressurized filter.
  • the object of the present invention is to provide a solid content recovery device and a solid content recovery method in which the pressurized gas does not adversely affect the solid content discharge means and various devices arranged downstream thereof.
  • the solid content recovery apparatus is powerful! ] A pressure-type filter that separates solids and liquids by filtering the slurry with pressurized gas; a discharge path that discharges the solids separated in the pressure-type filter; A solid content recovery apparatus comprising: a discharge means for discharging solid content; and a deposition means for depositing the solid content is provided in the discharge path at an upstream side of the discharge means. The pressurized gas in the pressurized filter is shut off by the solid deposit layer.
  • the solid content recovery device is the measurement device according to claim 1, provided with a measuring device for measuring the height of the deposited layer.
  • Control means for controlling the discharge amount of the solid content by the discharge means based on the measured value is provided.
  • the pressure filter is a rotary single chamber filter. Specially It is a sign.
  • the solid content recovery device is the solid content recovery device according to any one of claims 1 to 3, wherein the solid content discharge means is the first unit.
  • the rotary valve has a container for temporarily storing the solid content taken out by the first rotary valve, and a second rotary valve for taking out the solid content from the container.
  • the solid content and the liquid content are separated by filtering the slurry under pressure of a pressurized gas in a sealed structure pressurized filter.
  • the discharge on the upstream side of the discharge means A step of depositing the solid content in a predetermined region of the road, a step of measuring the height of the deposited layer of the solid content, and a step of controlling the discharge amount by the discharge means based on the measurement result. It is characterized by that.
  • the pressure of the pressurized filter can be prevented from leaking gas to the low pressure side, and the power cost can be saved. It is possible to provide a solid content recovery apparatus and a solid content recovery method that do not adversely affect various devices arranged on the downstream side.
  • FIG. 1 is a schematic view showing an embodiment of the solid recovery device of the present invention.
  • the solid content recovery apparatus 20 of the present embodiment includes a pressure filter 21 that filters the slurry S under pressure to separate the solid content from the filtrate as a wet cake C.
  • the first screw feeder 22 arranged in the discharge passage of the pressure filter 21, the first rotary valve 23 for taking out the wet cake C supplied from the pressure filter 21 by the first screw feeder 22, and the first rotary valve Buffer tank 24 for temporarily storing wet cake C taken out to the low pressure side (atmospheric pressure side) through 23, second rotary valve 25 for taking out wet cake C from buffer tank 24, and second rotary valve 25 Taken out through And a second screw feeder 27 for feeding the Etto cake C to the dryer 26.
  • the pressurizing filter 21 includes a slurry supply pipe 21A, a slurry reservoir 21B, a rotating drum 21C, a rotor, a udging 21D, a gas supply pipe 21E, and a cake discharge path 21F.
  • This is a rotary single-chamber filter that discharges the wet cake C from the cake discharge passage 21F to the first screw feeder 22.
  • 21G is a pipe through which the slurry overflows from the slurry reservoir 21B.
  • the wet cake C supplied from the first screw feeder 22 is deposited in the discharge path between the first screw feeder 22 and the first rotary valve 22.
  • a deposition means 28 is provided.
  • the deposition means 28 includes a deposition tube 28A on which the wet cake C is deposited and a ball valve 28B that holds the wet cake C in the deposition tube 28A, and is deposited on the deposition tube 28A that forms a part of the discharge path.
  • the wet cake C has a sealing function of blocking the discharge path of the pressure filter 21 from the first rotary valve 23 and maintaining the airtightness in the pressure filter 21.
  • the first rotary valve 23 since the first rotary valve 23 does not require a high level of confidentiality, the first rotary valve 23 can employ a structure in which the airtightness between the rotary blade and the casing is reduced. Wear between the two can be reduced.
  • the ball valve 28B is closed when the wet cake C is deposited in the deposition tube 28A, and is opened by the first rotary valve 23 when the wet cake C is taken out from the deposition tube 28A. Therefore, at the start of operation, the ball valve 28B is controlled to open when the pressurizing filter 21 is operated for a predetermined time and a predetermined amount of wet cake C is accumulated in the deposition tube 28A.
  • a height measuring device 30 is attached to the deposition tube 28A, and the height measuring device 30 constantly measures the height of the deposited layer of the wet cake C in the deposition tube 28A.
  • a first controller 31 is connected to the height measuring device 30, and the first controller 31 controls the rotational speed of the first rotary valve 23 based on the measurement signal of the height measuring device 30 and accumulates it. The discharge amount of the wet cake C in the pipe 28A is adjusted to maintain the wet cake C in the deposition pipe 28A at a predetermined height.
  • the first controller 31 increases the discharge amount of the wet cake C based on the measurement signal from the height measuring device 30. Adjustment is made so as to obtain a predetermined deposition height. On the contrary, if the wet cake C becomes lower than the predetermined pile height, the first controller 31 reduces the discharge amount of the wet cake C to the predetermined pile height based on the measurement signal from the height measuring device 30. Adjust as follows. In this way, the first controller 31 always maintains the wet cake C of the stacking tube 28A at a constant height based on the measurement signal from the height measuring device 30, and the sealing function by the wet cake C is stabilized. To do.
  • the amount of gas leakage is determined as a result of various investigations on the allowable amount of gas leakage. It was found to depend on the pressure, the diameter of the deposition tube 28A, and the moisture content of the wet cake C. If it is preferable to set the gas leakage to 10 Nm 3 Z or less in order to prevent adverse effects on the devices arranged downstream of the first rotary valve 23, the gas leakage will be 10 Nm 3. It was also found that it is preferable to set the deposition height of the wet cake C in the deposition means 28 to about 1500 mm in order to suppress it to Z minutes or less.
  • the buffer tank 24 is a sealed container that temporarily stores the wet cake C discharged by the first rotary valve 23.
  • the koffa tank 24 also has a role of temporarily storing gas leaking from the first rotary valve 23 in the event that the seal mechanism of the deposition means 28 is broken.
  • a pressure detector 32 for detecting the pressure of the leaked gas is attached to the notch tank 24, and a second controller 33 is connected to the pressure detector 32.
  • a gas discharge pipe 34 is connected to the buffer tank 24, and a valve 35 that is driven via the second controller 33 is attached to the gas discharge pipe 34.
  • the second controller 33 starts and stops the second rotary valve 25 based on the detection signal from the pressure detector 32.
  • the second controller 33 opens the nozzle 35 of the discharge pipe 34 based on the detected signal to return the inside of the buffer tank 24 to the atmospheric pressure. In this way, the pressure of the leaked gas in the buffer tank 24 is large. Even when the pressure exceeds the atmospheric pressure, the pressure detector 32 and the second controller 33 function to return the pressure in the buffer tank 24 to the atmospheric pressure, thereby preventing the gas leakage to the downstream side, and the second screw feeder 27 and the dryer. It is possible to reliably prevent adverse effects on 26.
  • 36 D is a scrubber attached to the discharge pipe 34.
  • the solid content recovery device 20 is driven, and an inert gas such as nitrogen gas is supplied from the gas supply pipe 21E into the housing 21D to pressurize the housing 21D.
  • an inert gas such as nitrogen gas is supplied from the gas supply pipe 21E into the housing 21D to pressurize the housing 21D.
  • the slurry S is filtered through the rotating drum 21C under pressure by the pressurized gas while the rotating drum 21C rotates in the direction of the arrow.
  • the solid content is collected as wet cake C on the surface of the rotating drum 21C.
  • the wet cake C is washed in the washing area while the rotating drum 21C rotates, and then reaches the peeling area, and the force of the rotating drum 21C is also peeled off by the peeling means.
  • the rotating drum 21C from which the wet cake C has been peeled reaches the liquid level of the slurry S and repeats the pressure filtration and washing described above.
  • the filtrate in the rotating drum 21C is discharged out of the rotating drum 21.
  • the wet cake C from which the rotating drum 21C force has also been peeled is also supplied into the first screw feeder 22 by the cake discharge path 21F.
  • the first screw feeder 22 supplies the wet cake C to the deposition tube 28A of the deposition means 28.
  • the ball valve 28B of the deposition means 28 is closed, the wet cake C is deposited in the deposition pipe 28A and the pressurized gas is prevented from leaking to the first rotary valve 23 side.
  • the first rotary valve 23 is driven at the same time as the ball valve 28B of the deposition means 28 is opened, and the deposition tube 28A is under atmospheric pressure.
  • the wet cake C inside is discharged to the buffer tank 24. While the wet cake C is discharged from the deposition tube 28A, the pressure filter 21 replenishes the deposition tube 28A with the wet cake C. Since the pressure filter 21 is sealed by the depositing means 28 in this way, even if the first rotary valve 23 is enlarged and the confidentiality is lowered, the pressurized gas is transferred from the first rotary valve 23 side to the buffer tank 24 side. There is no leakage. [0030] During this time, the wet cake C in the deposition tube 28A is constantly monitored by the height measuring device 30.
  • the first controller 31 is activated based on the measurement signal from the height measuring device 30 to increase the discharge amount of the wet cake C by the first rotary valve 23. Adjust to a predetermined pile height. On the contrary, if the wet cake C is lower than the predetermined pile height, the first controller 31 is activated based on the measurement signal from the height measuring device 30 to reduce the discharge amount of the wet cake C by the first rotary valve 23. To adjust to a predetermined height. In this way, the sealing function by the wet cake C is stabilized by always maintaining the wet cake C of the deposition tube 28A at a constant height.
  • the second rotary valve 25 causes the wet cake C in the buffer tank 24 to be discharged under atmospheric pressure. 2Discharge to screw feeder 27.
  • the second screw feeder 27 supplies the wet cake C to the dryer 26, and the wet cake C is dried in the dryer 26 and supplied to the subsequent process. Accordingly, the pressurized gas of the pressurized filter 21 does not leak from the first rotary valve 23 to the downstream side, and the second screw feeder 27 arranged on the downstream side of the first rotary valve 23 may adversely affect the dryer 26.
  • the pressurized gas of the pressurized filter 21 does not leak from the first rotary valve 23 to the downstream side, and the second screw feeder 27 arranged on the downstream side of the first rotary valve 23 may adversely affect the dryer 26.
  • the sealing function by the depositing means 28 is broken for some reason and the pressurized gas of the pressurized filter 21 leaks from the first rotary valve 23 to the buffer tank 24, the inside of the buffer tank 24 The pressure exceeds atmospheric pressure.
  • the pressure detector 32 detects a pressure higher than the atmospheric pressure, and transmits the detection signal to the second controller 33. Based on the detection signal, the second controller 33 automatically opens the valve 35 of the discharge pipe 34 to discharge the gas in the buffer tank 24 and return the buffer tank 24 to atmospheric pressure.
  • the second controller 33 works so that the leaked gas is discharged from the discharge pipe 34 and instantaneously returned to atmospheric pressure.
  • the wet cake C can be continuously discharged from the buffer tank 24 without stopping. Therefore, even if the sealing function of the depositing means 28 is destroyed, the leakage of the pressurized gas from the buffer tank 24 to the downstream side thereof is prevented, and the adverse effects on various devices on the downstream side of the buffer tank 24 are prevented. It can be surely prevented.
  • the pressurizing filter 21 separates the wet cake C and the liquid component by filtering the slurry S under the pressurization of the pressurized gas.
  • the pressurized gas does not leak to the downstream side of the first rotary valve 23, and there is no possibility that the pressurized gas will adversely affect the downstream equipment.
  • the discharge amount of the wet cake C from the first rotary valve 23 is controlled based on the measurement result of the height measuring device 30, and the height of the deposited layer of the wet cake C of the deposition means 28 is kept constant. Therefore, the blocking function of the pressure filter 21 by the deposited layer can be stabilized. Furthermore, since the leakage of the pressurized gas from the pressurized filter 21 can be prevented, the amount of pressurized gas used can be saved.
  • the solid content recovery device of the present invention is provided with a solid content depositing means between the pressurizing filter and the discharge means, and the pressurized gas of the pressurizing filter is sealed by the solid content deposited by the depositing means. Any device having a configuration to do so may be used.
  • the solid content recovery method of the present invention includes a step of depositing a solid content in a predetermined region of a solid content discharge path upstream of the discharge means, and a step of measuring the height of the solid content deposition layer. And a step of controlling the discharge amount by the discharge means based on the measurement result.
  • the present invention relates to general engineering industry, fertilizer industry, metal that collects solids by filtering slurry. It can be used in fields such as industry or food industry. Brief Description of Drawings
  • FIG. 1 is a schematic view showing one embodiment of the solid content recovery device of the present invention.
  • FIG. 2 is a schematic view showing a main part of a conventional solid content recovery device.
  • FIG. 3 is a schematic view showing a main part of another conventional solid content recovery apparatus. Explanation of symbols

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un appareil de récupération de contenu solide qui empêche une fuite de gaz à partir d'un filtre-presse vers son côté basse pression, réalisant des économies de coûts énergétique, et qui évite des influences adverses du gaz de pression du filtre-presse sur le moyen de décharge de contenu solide et sur différents dispositifs placés en aval de celui-ci. L'appareil de récupération de contenu solide révélé (20) comprend - un filtre-presse (21) apte à filtrer la bouillie (S) sous du gaz de pression afin de séparer celle-ci en un gâteau humide (C) et en un liquide; - un canal de décharge permettant de décharger le gâteau humide (C) séparé par le filtre-presse (21); et, - une première soupape rotative (23), un réservoir tampon (24) et une seconde soupape rotative (25), lesquels sont placés le long du canal de décharge et utilisés pour décharger le gâteau humide (C), où un moyen de dépôt (28) permettant de déposer le gâteau humide (C) est positionné en amont de la première soupape rotative (23) et sur le canal de décharge, de sorte que le gaz de pression à l'intérieur du filtre-presse (21) est bloqué par la première soupape rotative (23) à l'aide d'une couche de dépôt de gâteau humide (C) à l'intérieur du moyen de dépôt (28).
PCT/JP2006/319002 2006-09-25 2006-09-25 Appareil de récupération de contenu solide et procédé de récupération de contenu solide WO2008038335A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2006800541858A CN101415476B (zh) 2006-09-25 2006-09-25 固体成分的回收装置以及固体成分的回收方法
JP2008536216A JPWO2008038335A1 (ja) 2006-09-25 2006-09-25 固形分の回収装置及び固形分の回収方法
PCT/JP2006/319002 WO2008038335A1 (fr) 2006-09-25 2006-09-25 Appareil de récupération de contenu solide et procédé de récupération de contenu solide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/319002 WO2008038335A1 (fr) 2006-09-25 2006-09-25 Appareil de récupération de contenu solide et procédé de récupération de contenu solide

Publications (1)

Publication Number Publication Date
WO2008038335A1 true WO2008038335A1 (fr) 2008-04-03

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PCT/JP2006/319002 WO2008038335A1 (fr) 2006-09-25 2006-09-25 Appareil de récupération de contenu solide et procédé de récupération de contenu solide

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JP (1) JPWO2008038335A1 (fr)
CN (1) CN101415476B (fr)
WO (1) WO2008038335A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010049598A1 (fr) * 2008-10-30 2010-05-06 Gaudfrin Dispositif d 'extraction des gâteaux issus de la filtration à disques sous pression et procédé d'extraction associé

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05504293A (ja) * 1989-12-29 1993-07-08 アマフィルター　ビーブイ フィルター装置からフィルターケーキを搬出する方法と装置
JP2002528245A (ja) * 1998-10-27 2002-09-03 オウトクンプ オサケイティオ ユルキネン 加圧空間から材料を除去する装置
JP2005118754A (ja) * 2003-10-20 2005-05-12 Mitsubishi Kakoki Kaisha Ltd 固形分の回収システム及び固形分の回収方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05504293A (ja) * 1989-12-29 1993-07-08 アマフィルター　ビーブイ フィルター装置からフィルターケーキを搬出する方法と装置
JP2002528245A (ja) * 1998-10-27 2002-09-03 オウトクンプ オサケイティオ ユルキネン 加圧空間から材料を除去する装置
JP2005118754A (ja) * 2003-10-20 2005-05-12 Mitsubishi Kakoki Kaisha Ltd 固形分の回収システム及び固形分の回収方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010049598A1 (fr) * 2008-10-30 2010-05-06 Gaudfrin Dispositif d 'extraction des gâteaux issus de la filtration à disques sous pression et procédé d'extraction associé
US20110204001A1 (en) * 2008-10-30 2011-08-25 Gaudfrin Device for Extracting Cakes Resulting from Pressurised Disc Filtration, and Associated Extraction Method
CN102202757A (zh) * 2008-10-30 2011-09-28 戈德弗兰公司 源自盘式压滤的滤饼的提取装置和相关提取方法
AU2008363518B2 (en) * 2008-10-30 2016-01-21 Gaudfrin Device for extracting cakes resulting from pressurised disc filtration, and associated extraction method
US9487360B2 (en) 2008-10-30 2016-11-08 Gaudfrin Device for extracting cakes resulting from pressurized disc filtration, and associated extraction method

Also Published As

Publication number Publication date
JPWO2008038335A1 (ja) 2010-01-28
CN101415476A (zh) 2009-04-22
CN101415476B (zh) 2012-09-19

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