WO2005084789A1 - スラリーの抜き出し方法 - Google Patents
スラリーの抜き出し方法 Download PDFInfo
- Publication number
- WO2005084789A1 WO2005084789A1 PCT/JP2005/004141 JP2005004141W WO2005084789A1 WO 2005084789 A1 WO2005084789 A1 WO 2005084789A1 JP 2005004141 W JP2005004141 W JP 2005004141W WO 2005084789 A1 WO2005084789 A1 WO 2005084789A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slurry
- tank
- extracting
- stirring tank
- extraction pipe
- Prior art date
Links
Classifications
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
- B01J8/0035—Periodical feeding or evacuation
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
- B01J8/10—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles or endless belts
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/09—Preparation of carboxylic acids or their salts, halides or anhydrides from carboxylic acid esters or lactones
-
- 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
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00743—Feeding or discharging of solids
- B01J2208/00761—Discharging
-
- 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
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00796—Details of the reactor or of the particulate material
- B01J2208/00823—Mixing elements
- B01J2208/00831—Stationary elements
- B01J2208/0084—Stationary elements inside the bed, e.g. baffles
Definitions
- the present invention relates to a method for extracting slurry from a stirring tank containing the slurry in a stable manner for a long period of time.
- slurry fields are used in various situations. However, since the slurry contains solids, this can cause some handling problems. One of them is that it is necessary to keep the solid in the slurry flowing so that it does not settle in the container. For this reason, the slurry is usually housed in a stirred tank equipped with a stirrer.
- Exfoliated sediments usually exist as large lumps or their crushed pieces that do not decompose to the size of the crystals in the slurry and remain exfoliated.
- extraction of slurry from the container is often performed through an extraction pipe usually provided at the bottom in order to reduce dead space.
- the opening of the extraction pipe is located at the same position as the tank bottom.
- the lump or the crushed material flows into the withdrawal tube and causes poor liquid transfer. May cause or even complete occlusion.
- various stirrers have been proposed, it is technically difficult to bring the slurry into a completely mixed state by stirring.
- the solubility of terephthalic acid in an aqueous solution under the reaction conditions is relatively small, so most of the generated terephthalic acid is It is suspended in an aqueous solution as crystals. Some of the crystals accumulate on the walls of the reactor and on the stirrer to form a hard solid. If solids are separated due to impact or the like and mixed into the slurry, they may flow into the extraction pipe at the bottom of the tank, and the extraction pipe may be blocked, preventing the slurry from being sent.
- the above-described blockage occurs because the pressure reducing valve has a narrowed portion that has a narrower flow path than the pipe. It is in a state that is likely to occur.
- Patent Literature 1 proposes a method in which an opening of an extraction pipe installed at the bottom is protruded by 50 mm or more from the bottom to be installed.
- a stirrer of a type that cannot project 5 Om m from the bottom depending on the shape of the stirrer, and has a drawback that its application range is limited.
- Patent Literature 1 Japanese Patent Application Laid-Open No. H08-141 4 8 6
- the present invention has been made in view of the background art described above, and has as its object a method of extracting a slurry in which the extraction of a slurry is not hindered by the exfoliated sediment and solids settled and deposited at the bottom of the tank. It is to provide
- the present inventors have conducted intensive studies to solve the above problems, and found that when an apparatus having a specific configuration is used, a slurry can be extracted without being hindered by sedimentation and accumulated solids. Thus, the present invention has been completed.
- the present invention has stated that "when extracting a slurry from a stirring tank having a bottom part, a side wall part, and a slurry extraction pipe and containing a slurry, A slurry extraction method characterized in that the slurry is extracted from the opening of the slurry extraction pipe on the side wall portion. "The blockage of the slurry extraction pipe can be prevented, and the above object can be achieved. .
- the opening of the slurry discharge pipe protrudes from the side wall of the stirring tank toward the inside of the stirring tank. In this case, it is possible to suppress the exfoliated matter and the settled solids from flowing into the slurry extraction pipe, and prevent the slurry extraction from being hindered.
- a slurry extraction pipe is installed on the side wall of the stirring tank so as to protrude into the stirring tank, and the normal direction of the opening surface of the slurry extraction pipe is the same as that of the slurry.
- 0 ° or more and less than 90 ° with respect to the downstream direction of the flow preferably 0 ° or more and 60 ° or less, more preferably 0 ° or more and less than 30 ° Is preferred.
- a vortex is generated downstream in the vicinity of the opening surface, and the stirring effect of the vortex can prevent solids from being formed in the slurry extraction pipe.
- the invention's effect According to the slurry extracting method of the present invention, since the slurry extracting pipe is provided on the side wall of the stirring tank containing the slurry, the solidified crystals deposited on the tank wall of the stirring tank and the stirring blade are removed. It is possible to prevent the slurry extraction pipe from being clogged by peeling and solid substances being deposited on the slurry extraction pipe to prevent the slurry extraction from being hindered.
- FIG. 1 is a schematic view of an example of a stirring tank used when carrying out the slurry extracting method of the present invention.
- 2 to 9 are schematic diagrams showing the specific shapes of the openings of the slurry extraction pipe.
- FIG. 1 shows an example of the stirring tank according to the embodiment of the present invention.
- Figure (a) is a horizontal sectional view taken along plane A-A in Figure (b)
- Figure (b) is a vertical sectional view taken along plane BB in Figure (a).
- FIG. 1 shows that the stirring tank 1 is formed in a vertical cylindrical shape, and the stirring tank has a bottom portion 1a and a side wall portion 1b. Further, the stirring tank is provided with a baffle 2 in the vertical direction along the inner wall of the side wall 1b.
- a stirring blade 3 is provided in the center of the stirring tank 1 in a vertical direction.
- the rotating shaft 4 of the stirring blade extends upward through the upper wall of the stirring tank 1, and is configured to be driven by a driving device 5.
- a raw material introduction path 6 is connected to an intermediate portion of the stirring tank 1.
- Stirring tank 1 side The wall portion 1b is provided with a slurry extraction pipe ⁇ ⁇ ⁇ ⁇ , preferably protruding from the side wall portion 1b of the stirring tank toward the inside of the stirring tank. Then, the slurry is discharged through the pressure reducing valve 8 as necessary.
- the method of the present invention can be preferably used in a slurry comprising terephthalic acid and a liquid.
- a liquid water or glycols such as ethylene glycol, propylene glycol, tetramethylene glycol, and diethylene glycol can be preferably mentioned. Water is most suitable because it is inexpensive and easy to handle.
- FIG. 2 is an enlarged view of the tip of the slurry extraction pipe 7 shown in FIG.
- the slurry extraction pipe 7 is projected inward from the side wall 1b of the stirring tank, and the normal direction 9a of the opening surface 9 is downstream of the slurry flow generated by stirring.
- the direction is set at an angle of 0 degree or more and less than 90 degrees, preferably 0 degree or more and 60 degrees or less, more preferably 0 degree or more and 30 degrees or less with respect to direction 10 (see FIG. 2 ( b)).
- the normal direction 9a of the opening surface 9 of the slurry discharge pipe 7 is set to an angle of 90 degrees or more with respect to the downstream direction 10 of the slurry flow. (See Fig. 3 (b)), the vortex 11 generated downstream of the slurry extraction pipe will be generated behind the opening surface, and the slurry stirring effect cannot be obtained. .
- the flow of the slurry is not limited to a flow generated only for the purpose of stirring, and may be, for example, a slurry flow generated when the slurry is introduced from the raw material introduction path into the stirring tank.
- the angle of the opening surface in the normal direction to the downstream direction of the slurry flow is shown to be clockwise, but is not limited to clockwise, and is not limited to clockwise. Yes (see Figure 7).
- FIGS. 4 to 9 are views showing an embodiment of a preferred shape of the protrusion of the slurry extraction pipe according to the present invention.
- the slurry extraction speed can be increased.
- the pressure valve is not particularly limited, and a normal pressure reducing valve can be used.
- the method of the present invention it is also preferable to draw out the slurry by suctioning it with a pump.
- a pump This is a preferred embodiment in that the speed of extracting the slurry can be increased.
- the pump is not particularly limited, and an ordinary pump for feeding liquid can be used.
- Example 1 In a terephthalic acid production facility based on the hydrolysis reaction of dimethyl terephthalate, the hydrolysis reaction is carried out in a four-stage continuous tank reactor having a plurality of stirring tanks having a stirrer as shown in FIG. At this time, a slurry consisting mainly of terephthalic acid and water, having a temperature of about 250 ° C, a pressure of 4 MPa, and a slurry concentration of about 50% by weight, in the first-stage reaction vessel was reduced by a pressure reducing valve. Thereafter, the solution was continuously fed to a second-stage reaction tank maintained at a temperature of about 23.5 ° C. and a pressure of 3 MPa.
- the terephthalic acid slurry in the second-stage reaction tank was sucked by a pump, and was continuously sent to the third-stage reaction tank maintained at a temperature of about 23.5 ° C and a pressure of 3 MPa.
- the terephthalic acid slurry in the third-stage reaction tank is continuously sent to the fourth-stage reaction tank maintained at a temperature of about 220 ° C and a pressure of 2.2 MPa through a pressure reducing valve.
- the terephthalic acid slurry in the fourth-stage reaction tank was continuously sent to a slurry storage tank maintained at a temperature of about 10 ° C. and an atmospheric pressure via a pressure reducing valve.
- the slurry extraction pipe in each reaction tank was placed on the side wall of the stirring tank, at a position that was always lower than the liquid level of the slurry in the reaction tank.
- the slurry extraction pipe was installed so that the normal direction of the opening face of the slurry extraction pipe was 30 degrees with respect to the downstream direction of the slurry flow generated by stirring.
- Example 1 a continuous tank type in which the installation direction of the slurry extraction pipe was changed so that the normal direction of the opening surface of the slurry extraction pipe was in the downstream direction of the slurry flow generated by the agitation, and was 0 ° with respect to the slurry extraction pipe A reactor was prepared. In other words, a slurry extraction pipe with the shape of the opening face as shown in Fig. 8 was used. When the slurry was sent using this device, the operation could be continued for four months without clogging.
- Example 1 the normal direction of the opening surface of the slurry extraction pipe was agitated.
- a continuous tank reactor was prepared in which the installation of the slurry extraction pipe was changed so as to be 60 degrees with respect to the downstream direction of the slurry flow generated by the above.
- the amount of slurry withdrawn per unit time was reduced to 85% of the amount at the start of the feed, but it was operated for 4 months without blockage Was able to continue.
- Example 1 when the slurry was withdrawn from the former stirring tank at the center of the bottom of the reactor and the slurry was sent, the slurry could not be withdrawn in 5 hours, and the operation was continued. could not be done.
- the slurry extraction method of the present invention can suppress the slurry extraction from being hindered by the separated sediment and sedimentation / accumulated solids, so that the extraction can be performed extremely stably, and the slurry is handled. Can be deployed in various fields.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Accessories For Mixers (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006510799A JP4660473B2 (ja) | 2004-03-05 | 2005-03-03 | スラリーの抜き出し方法 |
EP05720412A EP1726356A4 (en) | 2004-03-05 | 2005-03-03 | METHOD OF DISCHARGING LIQUID SLUDGE |
US10/591,249 US7482485B2 (en) | 2004-03-05 | 2005-03-03 | Method for extracting slurry |
AU2005219323A AU2005219323B2 (en) | 2004-03-05 | 2005-03-03 | Slurry discharging method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-062331 | 2004-03-05 | ||
JP2004062331 | 2004-03-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005084789A1 true WO2005084789A1 (ja) | 2005-09-15 |
Family
ID=34918112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/004141 WO2005084789A1 (ja) | 2004-03-05 | 2005-03-03 | スラリーの抜き出し方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7482485B2 (ja) |
EP (1) | EP1726356A4 (ja) |
JP (1) | JP4660473B2 (ja) |
AU (1) | AU2005219323B2 (ja) |
TW (1) | TW200534922A (ja) |
WO (1) | WO2005084789A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017042688A (ja) * | 2015-08-24 | 2017-03-02 | 住友金属鉱山株式会社 | スラリーの処理装置、スラリーの排出方法 |
JP2020032403A (ja) * | 2018-08-28 | 2020-03-05 | 旭化成株式会社 | 酸化物触媒の製造装置、酸化物触媒の製造方法、及びその酸化物触媒を用いた不飽和酸又は不飽和ニトリルの製造方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10087578B2 (en) | 2013-08-09 | 2018-10-02 | Inbicon A/S | Device for discharging pretreated biomass from higher to lower pressure regions |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0889706A (ja) * | 1994-09-19 | 1996-04-09 | Mitsubishi Chem Corp | 晶析槽の運転方法 |
JPH10216661A (ja) | 1997-01-31 | 1998-08-18 | Toshiba Corp | 蛍光体洗浄槽 |
JPH10291957A (ja) * | 1997-02-20 | 1998-11-04 | Mitsui Chem Inc | 芳香族カルボン酸の製造方法および装置 |
JPH11128612A (ja) * | 1997-08-25 | 1999-05-18 | Mitsubishi Heavy Ind Ltd | 液抜き装置及び湿式排煙脱硫装置のスラリ濃度管理方法 |
JP2003128624A (ja) * | 2001-10-16 | 2003-05-08 | Teijin Ltd | ポリエステル原料の製造方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5502247A (en) * | 1994-11-17 | 1996-03-26 | Amoco Corporation | Process for recovery of aromatic acid or ester and polyol from waste polyester resins |
JPH08141386A (ja) | 1994-11-21 | 1996-06-04 | Mitsubishi Chem Corp | スラリーの抜出し方法 |
US5919977A (en) * | 1997-02-20 | 1999-07-06 | Mitsui Chemicals, Inc. | Process for producing aromatic carboxylic acid and apparatus therefor |
US6572259B2 (en) | 2001-04-20 | 2003-06-03 | Burnett Lime Co., Inc. | Apparatus and method to dispense a slurry |
-
2005
- 2005-03-03 JP JP2006510799A patent/JP4660473B2/ja not_active Expired - Fee Related
- 2005-03-03 US US10/591,249 patent/US7482485B2/en not_active Expired - Fee Related
- 2005-03-03 EP EP05720412A patent/EP1726356A4/en not_active Withdrawn
- 2005-03-03 AU AU2005219323A patent/AU2005219323B2/en not_active Ceased
- 2005-03-03 WO PCT/JP2005/004141 patent/WO2005084789A1/ja active Application Filing
- 2005-03-04 TW TW094106706A patent/TW200534922A/zh unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0889706A (ja) * | 1994-09-19 | 1996-04-09 | Mitsubishi Chem Corp | 晶析槽の運転方法 |
JPH10216661A (ja) | 1997-01-31 | 1998-08-18 | Toshiba Corp | 蛍光体洗浄槽 |
JPH10291957A (ja) * | 1997-02-20 | 1998-11-04 | Mitsui Chem Inc | 芳香族カルボン酸の製造方法および装置 |
JPH11128612A (ja) * | 1997-08-25 | 1999-05-18 | Mitsubishi Heavy Ind Ltd | 液抜き装置及び湿式排煙脱硫装置のスラリ濃度管理方法 |
JP2003128624A (ja) * | 2001-10-16 | 2003-05-08 | Teijin Ltd | ポリエステル原料の製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1726356A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017042688A (ja) * | 2015-08-24 | 2017-03-02 | 住友金属鉱山株式会社 | スラリーの処理装置、スラリーの排出方法 |
JP2020032403A (ja) * | 2018-08-28 | 2020-03-05 | 旭化成株式会社 | 酸化物触媒の製造装置、酸化物触媒の製造方法、及びその酸化物触媒を用いた不飽和酸又は不飽和ニトリルの製造方法 |
JP7216620B2 (ja) | 2018-08-28 | 2023-02-01 | 旭化成株式会社 | 酸化物触媒の製造装置、酸化物触媒の製造方法、及びその酸化物触媒を用いた不飽和酸又は不飽和ニトリルの製造方法 |
Also Published As
Publication number | Publication date |
---|---|
US7482485B2 (en) | 2009-01-27 |
EP1726356A4 (en) | 2008-03-26 |
AU2005219323B2 (en) | 2010-11-25 |
US20070179313A1 (en) | 2007-08-02 |
AU2005219323A1 (en) | 2005-09-15 |
TW200534922A (en) | 2005-11-01 |
JP4660473B2 (ja) | 2011-03-30 |
EP1726356A1 (en) | 2006-11-29 |
JPWO2005084789A1 (ja) | 2008-01-17 |
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