WO2003059501A1 - Appareil et procede de granulation d'hydrates mixtes de chlorure de calcium et de chlorure de sodium et granules de ces hydrates mixtes - Google Patents

Appareil et procede de granulation d'hydrates mixtes de chlorure de calcium et de chlorure de sodium et granules de ces hydrates mixtes Download PDF

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Publication number
WO2003059501A1
WO2003059501A1 PCT/JP2001/011636 JP0111636W WO03059501A1 WO 2003059501 A1 WO2003059501 A1 WO 2003059501A1 JP 0111636 W JP0111636 W JP 0111636W WO 03059501 A1 WO03059501 A1 WO 03059501A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluidized bed
raw material
particles
calcium
salt
Prior art date
Application number
PCT/JP2001/011636
Other languages
English (en)
Japanese (ja)
Inventor
Mitsuhiro Nishimoto
Kazuhito Nishimoto
Takashi Ichimura
Masayasu Ito
Zenji Kato
Satoshi Suwa
Sumito Satou
Original Assignee
Kaisei Kogyo Co., Ltd.
Aitech Co., Ltd.
Tsukishima Kikai Co., 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 Kaisei Kogyo Co., Ltd., Aitech Co., Ltd., Tsukishima Kikai Co., Ltd. filed Critical Kaisei Kogyo Co., Ltd.
Priority to AU2002225376A priority Critical patent/AU2002225376A1/en
Priority to PCT/JP2001/011636 priority patent/WO2003059501A1/fr
Publication of WO2003059501A1 publication Critical patent/WO2003059501A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D3/00—Halides of sodium, potassium or alkali metals in general
    • C01D3/22—Preparation in the form of granules, pieces, or other shaped products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/16—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/20—Halides
    • C01F11/24—Chlorides

Definitions

  • the sprayed aqueous calcium chloride solution adheres to the seed particles flowing in the fluidized bed and granulates, so that it is possible to generate a granulated product using a dilute aqueous solution, and Even if the temperature in the fluidized bed is relatively low, by adjusting the partial pressure of steam in the fluidized bed, the vapor pressure of calcium chloride is set to an appropriate vapor pressure corresponding to this temperature in the vapor pressure diagram.
  • calcium chloride hydrate having a predetermined number of water molecules can be granulated. .
  • the granulated hydrated calcium salt hydrate thus granulated is used, for example, as a snow-melting agent.
  • the surface of the granulated material is made of only salted hydrate calcium hydrate.
  • a granulating apparatus of the present invention provides a mixed aqueous solution of Zionidani calcium and Shiidani sodium and Z or An apparatus for granulating a mixed hydrate of salted calcium and salted sodium, which produces a granulated product by spraying a raw material solution comprising a mixture of an aqueous solution of calcium chloride and solid sodium chloride, wherein the fluidized bed
  • the supply system for supplying the raw material solution further comprises a solidification preventing device for preventing the raw material solution from staying in the supply system to thereby prevent the solidification of the raw material solution.
  • the number of sieves, the size of the mesh, the inclination angle with respect to the horizontal plane, and the like of the sieve mesh are appropriately set according to the size and shape of the granules of the granulated product to be separated as a product.
  • the feed pipe 1 from which the shield plate 19 is branched By closing one of the eight, particles can be selectively fed to the other.
  • the branched feed pipe 18 is connected to the pulverizer 16 and the drying cooler 20, respectively, and is connected to the second damper 17.
  • the branched feed pipe 18 is connected to the fluidized bed 1 and the seed hopper 12.
  • the medium particles stored in the hopper 21 A beyond the position of the supply pipe 21 C are discharged from the supply pipe 21 C and It is supplied to the pulverizer 16 and pulverized together with the coarse particles as described above.
  • the medium particles extracted by the vibrating conveyor 21 B in the storage device 21 and the coarse particles selectively discharged by the first damper 15 are solidified in the drying cooler 20.
  • the product is subjected to anti-sintering treatment to obtain a product.
  • the exhaust port of the fluidized bed 1 provided with the humidity sensor H 3 is connected to the scrubber 22.
  • the scrubber 22 sprays exhaust gas from the fluidized bed 1 introduced into the washing tower 22A from a spray nozzle 22B provided at an upper part in the washing tower 22A. It is a spray type that is washed with washing water.
  • the washing liquid that has washed the exhaust gas and absorbed the calcium salt component and the sodium salt component contained in the exhaust gas is held at the bottom of the washing tower 22A.
  • the steam is heated by steam and circulated as washing water by a scrubber pump 23, and at least a part of the tank is mixed with a mixture of salted calcium and salted sodium as raw materials. It can be circulated and supplied to 10 as well.
  • the exhaust gas cleaned by the scrubber 22 can be exhausted by the exhaust blower 24. Have been. ⁇
  • a spray nozzle 8 is arranged at a predetermined spray height by being moved up and down as appropriate, and supplied from a raw material solution tank 1 ° whose concentration has been adjusted by the concentration adjusting device 9 described above. This is supplied by the pump 11 through the supply line 11A, Is sprayed from the spray nozzle 8.
  • the concentration of the raw material melt adjusted by the concentration adjusting device 9 is lower than the state of a molten salt such as a conventional granulator using a flaker or a rotating disk, and is about 5 wt%. It is said to be as low as about 6 O wt% at most, and usually about 37-53 wt%. Then, the raw material solution thus sprayed adheres to the surface of the flowing seed particles and is dried, and the seed particles are enlarged to form granules.
  • the granulator having the above configuration, by adjusting the partial pressure of water vapor in the fluidized bed 1 according to the temperature in the fluidized bed 1 in this manner, a predetermined salted calcium to be granulated can be obtained.
  • the vapor pressure of the calcium chloride hydrate in the fluidized bed 1 can be set to the vapor pressure corresponding to the number of water molecules of the calcium chloride hydrate in the sodium chloride mixture.
  • a mixed hydrate of calcium chloride and sodium salt containing calcium chloride hydrate having a molecular number can be produced. For this reason, it is possible to reliably produce a granulated product of a mixed hydrate with salted sodium containing calcium chloride hydrate having an appropriate number of water molecules according to the use as a product.
  • the aqueous solution of calcium chloride in the solution solidifies and causes clogging, and the next time the granulation is restarted, even if the raw material solution is sprayed from the spray nozzle 8, the raw material solution can be supplied to the supply pipe 11A.
  • the raw material solution remaining in the supply pipe 11A by closing the pulp 11B is returned to the tank 10 via the return pipe 25.
  • the return pipe 25 or by circulating the raw material solution through the supply pipe 11A and the return pipe 25, it is possible to prevent the raw material solution from remaining in the supply pipe 11A and prevent the solidification thereof. You can.
  • the scrubber 22 is of a spray type that cleans exhaust gas introduced into the cleaning tower 22A with cleaning water sprayed from a spray nozzle 22B.
  • a spray-type scrubber 22 has a slower exhaust gas flow rate for processing than, for example, a venturi-type scrubber, thereby reducing the pressure loss.
  • the power of the exhaust blower 24 for exhausting the exhaust gas is small, and therefore, according to the present embodiment, it is possible to achieve more economical granulation.
  • the generated granules are used as a hygroscopic material, it is possible to secure a sufficient space around the particles and improve the hygroscopicity by the former spinous granules in the shape of confetti.
  • the latter round granulated product has a higher filling rate per container per unit volume than the former, and can exhibit stable moisture absorption over a long period of time. Can be obtained.
  • the temperature and humidity (water content) of the flowing gas, and the concentration and flow rate of the raw material solution are automatically controlled using a computer or the like based on the measurement results of other sensors. This makes it possible to more accurately adjust the partial pressure of water vapor.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Glanulating (AREA)

Abstract

L'invention concerne un appareil de granulation d'hydrates mixtes de chlorure de calcium et de chlorure de sodium, dans lequel un fluide matière première contenant une solution aqueuse mixte de chlorure de calcium et de chlorure de sodium et/ou un mélange d'une solution aqueuse de chlorure de calcium et de chlorure de sodium solide est pulvérisé en particules de granulation dans une couche fluidisée (1) et simultanément les particules de granulation sont fluidisées pour se transformer en granulés. L'invention est caractérisée en ce que l'appareil a, dans son système d'alimentation, un réservoir (10) et un conduit d'alimentation (11A) destiné à céder le fluide matière première à la couche fluidisée (1), un dispositif empêchant la consolidation tel qu'une conduite de retour (25) ou une conduite d'évacuation (26), destiné à empêcher le fluide matière première d'être retenu dans le système d'alimentation et, par conséquent, de se consolider. Même lorsque l'opération de granulation est arrêtée dans la couche fluidisée, l'appareil est dépourvu de colmatage dans le système d'alimentation du fluide matière première et peut être redémarré rapidement et sans à-coups.
PCT/JP2001/011636 2001-12-28 2001-12-28 Appareil et procede de granulation d'hydrates mixtes de chlorure de calcium et de chlorure de sodium et granules de ces hydrates mixtes WO2003059501A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002225376A AU2002225376A1 (en) 2001-12-28 2001-12-28 Apparatus and method for granulating mixed hydrate of calcium chloride and sodium chloride, and granule of the mixed hydrate
PCT/JP2001/011636 WO2003059501A1 (fr) 2001-12-28 2001-12-28 Appareil et procede de granulation d'hydrates mixtes de chlorure de calcium et de chlorure de sodium et granules de ces hydrates mixtes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/011636 WO2003059501A1 (fr) 2001-12-28 2001-12-28 Appareil et procede de granulation d'hydrates mixtes de chlorure de calcium et de chlorure de sodium et granules de ces hydrates mixtes

Publications (1)

Publication Number Publication Date
WO2003059501A1 true WO2003059501A1 (fr) 2003-07-24

Family

ID=11738096

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/011636 WO2003059501A1 (fr) 2001-12-28 2001-12-28 Appareil et procede de granulation d'hydrates mixtes de chlorure de calcium et de chlorure de sodium et granules de ces hydrates mixtes

Country Status (2)

Country Link
AU (1) AU2002225376A1 (fr)
WO (1) WO2003059501A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110330045A (zh) * 2019-07-17 2019-10-15 曲靖众一合成化工有限公司 一种回收永固紫精制废水中氯化钙的方法
CN111268713A (zh) * 2020-01-20 2020-06-12 岳中周 一种固体氯化钙的生产方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61153132A (ja) * 1984-12-26 1986-07-11 Mitsui Toatsu Chem Inc 尿素の造粒方法
US5632102A (en) * 1994-11-14 1997-05-27 Glatt Gmbh Process and apparatus for the production and/or treatment of particles
JPH10183105A (ja) * 1996-12-20 1998-07-14 Tokuyama Corp 融雪剤
JP2000203833A (ja) * 1999-01-13 2000-07-25 Kaisei Kogyo Kk 塩化カルシウム水和物の造粒方法および造粒装置
JP2002020118A (ja) * 2000-07-03 2002-01-23 Kaisei Kogyo Kk 塩化カルシウム水和物の造粒装置および造粒方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61153132A (ja) * 1984-12-26 1986-07-11 Mitsui Toatsu Chem Inc 尿素の造粒方法
US5632102A (en) * 1994-11-14 1997-05-27 Glatt Gmbh Process and apparatus for the production and/or treatment of particles
JPH10183105A (ja) * 1996-12-20 1998-07-14 Tokuyama Corp 融雪剤
JP2000203833A (ja) * 1999-01-13 2000-07-25 Kaisei Kogyo Kk 塩化カルシウム水和物の造粒方法および造粒装置
JP2002020118A (ja) * 2000-07-03 2002-01-23 Kaisei Kogyo Kk 塩化カルシウム水和物の造粒装置および造粒方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110330045A (zh) * 2019-07-17 2019-10-15 曲靖众一合成化工有限公司 一种回收永固紫精制废水中氯化钙的方法
CN111268713A (zh) * 2020-01-20 2020-06-12 岳中周 一种固体氯化钙的生产方法

Also Published As

Publication number Publication date
AU2002225376A1 (en) 2003-07-30

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