CN106139696A - Filter - Google Patents
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- CN106139696A CN106139696A CN201610322175.3A CN201610322175A CN106139696A CN 106139696 A CN106139696 A CN 106139696A CN 201610322175 A CN201610322175 A CN 201610322175A CN 106139696 A CN106139696 A CN 106139696A
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- China
- Prior art keywords
- filter
- reel
- solid
- fluid
- cleaning
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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
- B01D33/067—Construction of the filtering drums, e.g. mounting or sealing arrangements
-
- 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
- B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
- B01D33/60—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for washing
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/29—Filter cartridge constructions
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
The present invention relates to a kind of rotary filter, comprising: a) filter reel, it positions in the enclosure and can enclose in a first direction in described shell and is rotated about their axes；B) loading area, it is for by the outer surface of solids laden to described filter reel；C) discharge region, it is for discharging solid from the described outer surface of described filter reel；D) the first solid cleaning area, before it is positioned at described discharge region in said first direction and after described loading area, and include being configured to clean the first solid cleaning fluid input that fluid is directed on the solid on the described outer surface of described filter reel；And e) filter reel cleaning area, before it is positioned at described loading area in said first direction and after described discharge region, and include being configured to clean the filter reel cleaning fluid input that fluid is directed on described filter reel, fluid output is cleaned with the filter reel being configured to clean fluid input collection cleaning fluid from described filter reel, described rotary filter is characterised by, described rotary filter is configured to that from described filter reel, cleaning fluid is cleaned fluid output and is delivered to described first solid cleaning fluid input.The invention still further relates to a kind of method for being separated by solid in rotary filter with liquid, and a kind of be incorporated to the method for the technique producing purified aromatic dicarboxylic acid.
Description
Technical field
The present invention relates to a kind of rotary filter, a kind of side for being separated by solid in rotary filter with liquid
Method, and a kind of be incorporated to the method for the technique manufacturing aromatic dicarboxylic acid.
Background technology
A large amount of chemical technologies that rotary filter separates with liquid for needing solid, such as, manufacture synthetic mesophase thing, than
Such as aromatic dicarboxylic acid (such as p-phthalic acid (TA)), p-phthalic acid (TA) is widely used for manufacturing the most poly-
Polyester such as (ethylene terephthalate) (PET).Rotary filter provides and allows to carry out some works in one piece apparatus
The advantage of skill step.Specifically, first serosity is separated into filter cake and filtrate by rotary filter, makes filter cake warp subsequently
By subsequent treatment (such as clean, be dried) and then discharged.Subsequent treatment can be including (for example) single phase or many
Stage cake clean, displacement cleaning, backwash, closed circulation cleaning, repulping, solvent exchange, decatize, extraction and
Mechanically or thermally cookies is dry.Processing step can perform in the separate sections chamber of filter interior, and this allows to drain discretely
Filtrate and other fluid.
Rotary filter generally includes rotatable reel, and rotatable reel has the external surface peripheral being arranged in its circumference
A series of filter units.A series of excretory duct is contained in the inside of reel, and the filtration of the bases of filter unit is situated between by it
Matter (commonly referred to as filter cloth or film) is connected to control head, controls head and collects filtrate and be applied to any place of cake
Reason fluid (such as, cleaning fluid) or the solid product being present on the outer surface of filter unit.Excretory duct also can be to
Filter unit provides gas backwash to evict filter cake during drain steps from.Reel can rotate in the enclosure, shell around
Its circumference is divided into a series of district, in each district can by processing stage be applied to filter cake, i.e. described district is the most each other
Continue so that along with reel rotate, filter unit run into continuously each district and each processing stage.Control head to bear
Duty drain indivedual filtrate discretely and include rotary core and static ring, described stationary ring iris wipe be divided into a series of district with
Those districts of shell are corresponding.
In use, by under stress serosity being fed to reel outside, serosity is applied to volume in the first phase
Cylinder.In filtration stage, via excretory duct, filtrate is removed to control head from filter cake, and filtrate can be made to return to produce slurry
The manufacturing process of liquid, is further processed, or is dropped.Along with reel rotates, filter cake moved from the inceptive filtering stage
To processing stage.These processing stage can comprise multiple wash phase.Make cleaning fluid by volume in a wash phase
Cylinder (via filter unit and excretory duct) is delivered to relevant to that wash phase via the cleaning fluid input in shell
The cleaning fluid controlled in the head output of connection.Then cleaning fluid can be removed from rotary filter, or inverse in the multistage
In stream cleaning process, can will clean the cleaning fluid input that fluid is directed in previous wash phase.With immediately preceding filter rank
Filter cake in the district that wash phase after Duan is associated is the dirtiest (that is, its pollutant containing Cmax), and
Filter cake in the district being associated with final wash phase (as filter cake experiences) is that the cleanest (that is, it contains minimum dense
The pollutant of degree).Similarly, the fluid that cleans being fed to final wash phase is typically the cleanest, and exits immediately
The fluid that cleans of the wash phase after filtration stage is typically the dirtiest.The final operational phase of rotary filter relates to
And such as by via the gas backwash of excretory duct and/or by machinery scraping remove filter cake, and cleaned filter cloth from reel
To remove residual solid and to prevent dirty.
Aromatic dicarboxylic acid manufactures typically by the catalysis oxidation of hydrocarbon presoma in organic solvent.As raw for PET
The reactant that produces and the TA that needs is referred to as " purified p-phthalic acid " (PTA) and usually contains more than 99.97 weights
Amount %, the p-phthalic acid of preferably more than 99.99 weight %, and the 4-p-carboxybenzaldehyde (4-CBA) less than 25ppm.
At commercial size, the PTA being suitable for PET production is typically to prepare by two-stage process.First, there is gold
(the most in atmosphere) xylol is aoxidized to provide in the case of metal catalyst (such as cobalt and/or manganese salt or compound)
" crude terephthalic acid " (CTA), such as (e.g.) US 2, described in 833,816.Secondly, this it is purified by subsequently
Oxidation reaction and the CTA that produces, this is because it generally by such as 4-CBA, paratolunitrile and gives yellowish to TA
The impurity such as the various foreign pigment of color pollute.The purification of CTA generally except need at least one physical procedures (such as crystallization,
Clean) outside also need at least one chemical transformation (such as hydrogenation) to obtain PTA.PTA is typically considered business
Product project, annual produces millions of tons, and it is thus desirable to make manufacturer reduce its cost so that the economy that produces of PTA and
Efficiency maximizes.This can be by not only reducing fund cost (such as equipment cost) but also reducing variable cost (such as with refuse
The cost that disposal, parent material use, organic solvent, heating fuel and demineralized water are associated) and realize.
Rotary filter cleans PTA crystal after can be used for the chemical transformation in purifying process.PTA serosity is presented
Deliver to outside filter reel, and clean gained PTA filter cake with water and be dried.The PTA discharged according to this step
Generally it is further dried and produces for PET.After discharge PTA filter cake, cleaned filter cloth is to remove remaining PTA
Crystal, makes filter cloth again contact fresh PTA serosity, and repeated washing circulation subsequently.
Need to reclaim the PTA removed in cloth cleaning step from filter.The PTA serosity that can will be caused by cloth cleaning step
It is recycled back in purge process (such as the water of the aqueous slurry for forming CTA in solvent exchange step
Part), thus cause PTA finally to enter back into the feeding for rotary filter.But, this causes per unit to be produced
The energy consumption of raw PTA increases (the most recycled PTA is heated twice).
One target of the present invention is to provide a kind of rotary filter, wherein effectively reclaims cleaned in cloth cleaning step
Solid.It is another object of the present invention to provide a kind of less expensive for manufacturing aromatic dicarboxylic acid and effective technique.
Other target will be apparent to from following description.
Summary of the invention
A first aspect of the present invention provides a kind of rotary filter, comprising:
A) filter reel, it positions in the enclosure and can enclose in a first direction in described shell and is rotated about their axes；
B) loading area, it is for by the outer surface of solids laden to described filter reel；
C) discharge region, it is for discharging solid from the described outer surface of described filter reel；
D) the first solid cleaning area, before it is positioned at described discharge region in said first direction and after described loading area,
And include that be configured to be directed on the solid on the described outer surface of described filter reel by cleaning fluid first is solid
Body cleans fluid input；And
E) filter reel cleaning area, its be positioned at described loading area in said first direction before and described discharge region it
After, and include being configured to clean the filter reel cleaning fluid input that fluid is directed on described filter reel,
Fluid output is cleaned with the filter reel being configured to clean fluid input collection cleaning fluid from described filter reel,
Described rotary filter is characterised by, described rotary filter is configured to cleaning fluid from described filtration
Device reel cleans fluid output and is delivered to described first solid cleaning fluid input.
Filter reel cleans in the cleaning fluid contact filtration device reel cleaning area the most suitably collected in fluid output
The outer surface of filter reel, the most for discharging the outer surface of the filter reel of solid in discharge region.Because crossing
The outer surface of the filter reel in filter reel cleaning area includes the cleaned solid of residual volume suitably, so from
Filter reel cleans the fluid that cleans of fluid output and is suitably or includes the cleaned solid in described cleaning fluid
Serosity.Therefore the transfer that this cleaning fluid cleans fluid input to the first solid allows by these cleaned solids extremely
A few part is collected on the filter in the first solid cleaning area and together with the main body of cleaned solid and reclaims row
Put in district, rather than clean with filter reel remove from rotary filter together with fluid and be dropped or stand unnecessary
Process (such as, in the case of being recirculated back to PTA via purge process) further.Additionally, total cleaning of filter
Fluid (such as water) consumes and reduces, this is because clean fluid via the first solid to input the cleaning being incorporated in filter
A part for fluid is cleaned fluid by recycled filter reel rather than the cleaning fluid of cleaning forms.
The present invention also provides for a kind of method separated with liquid by solid in rotary filter in this respect, it include with
Lower step:
I () is by being incorporated into the mixture of described solid and described liquid on the outer surface of filter reel in loading area
And by described solids laden to the described outer surface of described filter reel, wherein said filter reel is positioned at shell
In and can enclose in a first direction in described shell and be rotated about their axes；
(ii) make described filter reel enclose in described shell in said first direction to be rotated about their axes；
(iii) in the first solid cleaning area, described filter is cleaned with the cleaning fluid cleaning fluid input from the first solid
Described solid on the described outer surface of reel；
(iv) cleaned solid is discharged from the described outer surface of described filter reel；And
V () is used for inherent filtration device reel in filter reel cleaning area and cleans the cleaning fluid described mistake of cleaning of fluid input
The described outer surface of filter reel and collect described cleaning fluid in filter reel cleans fluid output,
Described method is characterised by, described method further includes steps of
(vi) the described filter reel of step (v) is cleaned the described cleaning fluid collected in fluid output and be directed to step
Suddenly described first solid of (iii) cleans fluid input.
Described solid generally includes aromatic dicarboxylic acid, it is therefore preferable to purified aromatic dicarboxylic acid.It is highly preferred that institute
Stating aromatic dicarboxylic acid is p-phthalic acid.Described liquid generally includes water.
Another aspect of the present invention provides a kind of technique for producing purified aromatic dicarboxylic acid, and it includes organic molten
The catalysis oxidation of hydrocarbon presoma in agent, described technique comprises the following steps:
I) in the case of there is metallic catalyst, in described organic solvent, described hydrocarbon presoma is aoxidized to provide rough fragrance
Race's dicarboxylic acids and discharge gas；And
II) rough aromatic dicarboxylic acid described in purification is to obtain described purified aromatic dicarboxylic acid,
Wherein said technique farther includes the method via a first aspect of the present invention by the purified aromatic series of solid
The step that dicarboxylic acids separates with liquid.
Accompanying drawing explanation
Fig. 1 is the expanded view of rotary filter.
Fig. 2 is the cross section of the rotary filter of Fig. 1.
Detailed description of the invention
Various embodiments of the present invention described herein.It will be recognized that the feature specified in each embodiment can refer to other
Determine feature and be combined to provide other embodiments.
Rotary filter
The rotary filter 10 that Fig. 1 is shown includes filter reel 12.Filter reel 12 is included in its outer surface
On filter unit 14, filter unit 14 via excretory duct 16 with control head 18 be in fluid communication.Cross
In filter reel 12 is positioned at shell 20 and can enclose in shell 20 and be rotated about their axes.
The rotary filter of the present invention is preferably hydraulic rotary filter.
Shell
The rotary filter of the present invention includes the shell containing filter reel, and filter reel can be in the enclosure first
Side rotates upward around its axle.Shell is generally of a series of opening, the mixture of solid and liquid (such as serosity) with
And process fluid (such as cleaning fluid) can be incorporated into rotary filter by described opening, and treated solid is (i.e.,
Filter cake) can be removed from rotary filter by described opening.Process fluid input and can include single entrance independently of one another
Port, maybe can include multiple entry port, and it can longitudinally and/or circumferentially be arranged around shell.Preferably, individual other places
Reason reagent (comprise serosity and process fluid) is by pressure feed to shell, and operation pressure usually no more than about 7 bar,
Generally between about 4 bars and about 5 bars, the differential pressure crossing over filter cake is typically about 3 bars (but being up to about 5 bars).Shell is indulged
Be divided into a series of district (or section chamber) to ground, its define filter reel rotate passed through many processing stage.
These districts comprise loading area, discharge region, the first solid cleaning area and filter reel cleaning area.
Loading area
Rotary filter includes loading area, and it includes that loading area inputs suitably, and the mixture of solid and liquid is (such as
Serosity) can be incorporated in rotary filter by the input of described loading area (inputting via loading area suitably).
Discharge region
Rotary filter includes discharge region, and it includes suitably for discharging filter cake (i.e., from the outer surface of filter reel
Cleaned solid on the outer surface of filter reel) component.Generally, this component includes plough or cutter, and it is arranged
Become and rotate along with filter reel and filter cake is wiped off from the outer surface of filter reel that (such as, described plough or cutter can be with mistakes
The outer surface tangentially of filter reel and arrange).This component is suitably disposed at discharge region output (such as chute or transmission
Band) top, for removing filter cake from rotary filter.
Rotary filter can include the further region in addition to above-mentioned district.For example, rotary filter can include solid
Dry section and/or one or more other solid cleaning area.
In each at least loading area, solid cleaning area and solid dry section (if present), the most outside
There is annular space between inner surface and the outer surface of filter reel of shell, therefore promote to carry out fluid even from described district
The input of the whole surface overlying regions of logical filter reel accesses reagent treatment.It will be appreciated that " annular space " is only on boundary
The arc of the circumference determining the inner surface of the shell in district extends above, and each district by suitable resolution element with proximity every
From.Therefore, annular space promote filter cake from described district whole surface overlying regions (or in the case of loading area,
The whole surface of filter cloth in described district) the input of given area access fluid.
Solid cleaning area
Before first solid cleaning area is positioned at discharge region in a first direction and after loading area, and include being configured to clearly
The first solid that wash body is directed on the solid on the outer surface of filter reel cleans fluid input.Cleaning fluid is usual
For water.Because the cleaning fluid from the cleaning fluid output of filter reel is delivered to the first solid and cleans stream in the present invention
Body inputs, so by the cleaning fluid cleaned on the solid that fluid input is directed on the outer surface of filter reel at least
A part is from filter reel cleaning area.Therefore, cleaning fluid input it is directed on the outer surface of filter reel
Solid on clean fluid suitably for or include the serosity of cleaned solid in described cleaning fluid.Flowed by cleaning
The remainder cleaning fluid on solid that body input is directed on the outer surface of filter reel is typically the clear of cleaning
Wash body, i.e. the cleaning fluid not yet used in cleaning process.This cleans fluid and can derive from and described solid and liquid
The technique (such as, aromatic dicarboxylic acid manufacturing process) that body is identical, can be maybe fresh cleaning fluid (such as demineraliting
Water).
As mentioned above, rotary filter can include one or more other solid cleaning area.After loading area
Solid cleaning area in filter cake (that is, the solid on the outer surface of filter reel) be that the dirtiest (that is, it contains
The pollutant of big concentration), and final solid cleaning area (that is, the filter cake final solid " experienced " in a first direction
Cleaning area) in filter cake be the cleanest (that is, its pollutant containing least concentration).Similarly, in a first direction
On be fed to the fluid that cleans of final solid cleaning area and be typically the cleanest, and exit the solid after loading area
The fluid that cleans of cleaning area is typically the dirtiest.Because being cleaned the cleaning fluid of fluid output collection by filter reel and depositing
Be the cleaned solid in described cleaning fluid at least with the filter cake entering final solid cleaning area in a first direction
It is equally clean, it may be preferred that rotary filter is configured to cleaning fluid defeated from filter reel cleaning fluid
Go out to be delivered to the cleaning fluid input of this final solid cleaning area, i.e. " the first solid cleaning area " is in a first direction
Final solid cleaning area (the final solid cleaning area experienced by filter cake).
The cleaning fluid cleaning fluid output from filter reel is preferably delivered to the in the case of without intermediate treatment
One solid cleans fluid and inputs to revise its chemical property.For example, the clear of fluid output is cleaned from filter reel
Wash body can clean fluid input without filtering and/or being delivered to the first solid in the case of chemical extraction.Roll up from filter
Cylinder clean fluid output cleaning fluid can be delivered in the case of without intermediate treatment first solid clean fluid input with
Revise its physical property (such as temperature, pressure).In the case of without intermediate treatment, inherent filtration device reel cleans stream in the future
The cleaning fluid of body output is delivered to the first solid cleaning fluid input and can avoid moving from rotary filter in this step
Except cleaning the solid reclaimed in fluid.
Therefore rotary filter can include the second solid cleaning area, and it is clear that it is positioned at the first solid the most in a first direction
Before washing district and after loading area.Rotary filter can farther include the 3rd solid cleaning area, and it is preferably first
Before being positioned at the second solid cleaning area on direction and after loading area.It is clear that rotary filter can farther include the 4th solid
Wash district, before it is positioned at the 3rd solid cleaning area the most in a first direction and after loading area.Rotary filter can
Farther include the 5th solid cleaning area, before it is positioned at the 4th solid cleaning area the most in a first direction and loading area
Afterwards.Rotary filter can provide backwash process, wherein by solid from first be associated with the first solid cleaning area
Body cleans the second solid cleaning fluid input that the cleaning fluid of fluid output collection is directed in the second solid cleaning area.Class
As, the cleaning fluid cleaning fluid output collection from the second solid being associated with the second solid cleaning area can be directed to
The 3rd solid in 3rd solid cleaning area cleans fluid input, can be by solid from the 3rd be associated with the 3rd solid cleaning area
Body cleans the 4th solid cleaning fluid input that fluid is directed in the 4th solid cleaning area of cleaning of fluid output collection, and
The cleaning fluid cleaning fluid collection from the 4th solid being associated with the 4th solid cleaning area can be directed to the 5th solid
The 5th solid in cleaning area cleans fluid.In this configuration, rotary filter can use " clean skew ", such as the
Described in No. 1410610.8 UK Patent Application cases, the full text of described patent application case is hereby incorporated herein by
In.
Solid dry section
Rotary filter (closes after being suitably included on first direction before being positioned at discharge region and the first solid cleaning area
Suitable ground is after all solids cleaning area) solid dry section.Solid dry section includes being configured to dry gas suitably
The solid on solid (the most cleaned solid) that body is directed on the outer surface of filter reel is dried gas input.
It is dried gas by heating (relative to filter cake) suitably to promote to be dried.Dry gas can be nitrogen, superheated steam or its
Mixture.
Filter reel cleaning area
Filter reel after rotary filter is included on first direction before being positioned at loading area and discharge region cleans
District, it includes being configured to clean the filter reel cleaning fluid input that fluid is directed on filter reel, and quilt
It is configured to clean fluid input from filter reel and collects the filter reel cleaning fluid output of cleaning fluid.Rotary mistake
Filter is configured in the future inherent filtration device reel and cleans the cleaning fluid of fluid output and be delivered to the first solid to clean fluid defeated
Enter.In the future inherent filtration device reel clean that this of fluid output cleans that fluid is delivered in the rotary filter of the present invention the
One solid cleans the component of fluid input and will be apparent to for the technician, such as conventional pipeline.
Filter reel cleaning area supply the outer surface discharging the filter reel of cleaned solid include residual suitably
The cleaned solid of surplus, i.e. these cleaned solids or are embedded in filter cloth on filter cloth.Therefore, come
Inherent filtration device reel cleans the fluid that cleans of fluid output and is suitably or includes cleaned the consolidating in described cleaning fluid
The serosity of body.Described serosity can include about 1 to about 50 weight % (gross weight based on described serosity) in described cleaning fluid
Or about 2.5 to about 45 weight %, or about 5 to about 40 weight %, or about 7.5 to about 35 weight %, preferably about 10
Cleaned solid to about 30 weight %.
Cleaning fluid is water suitably.Filter reel cleans fluid input and is configured to clean cleaning fluid suitably
It is directed on filter reel, i.e. the cleaning fluid not yet used in cleaning process.This clean fluid can derive from
Described solid and liquid phase technique (such as aromatic dicarboxylic acid manufacturing process) together, can be maybe fresh cleaning fluid (example
Such as demineralized water).
Filter reel cleans fluid input and is configured to be directed to cleaning fluid the outer surface of filter reel suitably
On.For example, the input of filter reel cleaning fluid can include that one or more spray nozzle, described spray nozzle are configured to
It is ejected into cleaning fluid on the outer surface of filter reel, thus cleaned filter cloth.Filter reel cleans fluid output
It can be the cleaning fluid of the outer surface being used for the filter reel in collection contact filtration device reel cleaning area the most suitably
Any component, such as conduit.
Filter reel
Filter reel is cylindrical suitably, and (that is, its curved surface, relative to it to include being arranged in its circumference suitably
It is typically the most smooth end face) multiple filter units (generally between 16 and 24) around.Therefore, mistake
The outer surface of filter reel can include multiple filter unit circumferentially arranged and/or multiple filter list being longitudinally arranged
Unit, and the most multiple the most circumferentially but also the filter unit that is longitudinally arranged, it can form the table across filter reel
The array of the filter unit of at least part of (and being preferably all) in face.Filter unit is by from filter reel
The filter unit wall that radially goes out of surface define and separated from one another, and generally cross over its surface circumferentially and vertical
Arrange to ground.In typical filter reel, filter unit accommodates filter unit insert, described filter list
Unit's insert is incorporated to filter medium (commonly referred to as filter cloth or film) and fastening (generally fixing) with bolt to reel.
Filter cloth allows to make fluid (such as filtrate, cleaning fluid, dry gas) logical when serosity is applied to filter reel
Cross, but collect filter cake (that is, solid) in its surface.Depending on the needs of application, filter cloth is typically by plastics or metal
Fabric is made, and this is conventional in the art.Therefore, each filter unit is defined, wherein by four walls suitably
Filter cloth, in the bases of unit, therefore forms pouch in the outer surface of filter reel, and fluid is (such as serosity, clear
Wash body) flowable in described pouch and solid material can be collected in described pouch.Cake thickness is generally 5 to 200
Mm, or 50 in the range of 175mm, or 120 to 150mm, and can by insertion have insert partition and
Change.
Therefore filter unit provides fluid intake in the outer surface of filter reel.By the fluid of filter cloth (such as
Filtrate, clean fluid, be dried gas) by be connected to fluid issuing multiple excretory ducts collect, fluid issuing again with control
Head is in fluid communication.Excretory duct from the multiple filter units in given lengthwise rows can and join the most really
Close to form the single feeding from given input area to fluid issuing.From the outer surface of filter reel to the stream controlling head
Therefore body path is provided by filter unit, filter cloth, excretory duct and fluid issuing.
Filter reel can enclose the most in a first direction and be rotated about their axes.This is its direction that " works ", i.e. its
Normal operating rotates to carry out the direction of the function required for rotary filter.Therefore, above-mentioned all process are being included
In the rotary filter in stage, along with reel rotates up in " first " or " work " side, its outer surface Shang Dianhuo district
(such as, filter unit) passes sequentially through loading area, the 5th solid cleaning area, the 4th solid cleaning in whole process rotates
District, the 3rd solid cleaning area, the second solid cleaning area, the first solid cleaning area, solid dry section, discharge region, and mistake
Filter reel cleaning area.
The production of aromatic dicarboxylic acid
It will be appreciated that for producing technique and the equipment of aromatic dicarboxylic acid by the catalysis oxidation of hydrocarbon presoma in organic solvent
General operation be well-known.For example, as discussed above, the p-phthalic acid that PET produces it is suitable for
(that is, purified p-phthalic acid) is typically to prepare by two-stage process.First, there is metallic catalyst (example
Such as cobalt and/or manganese salt or compound) in the case of aoxidize (such as using air) xylol to provide rough terephthaldehyde
Acid.Secondly, the crude terephthalic acid being purified by this oxidation reaction subsequently and produce is with removal of impurity (such as, 4-CBA
And paratolunitrile) to obtain purified p-phthalic acid.The purification of crude terephthalic acid is generally except needing at least one
At least one chemical transformation (such as hydrogenation) is also needed to outside individual physical procedures (such as crystallize, cleaning etc.).
The aromatic dicarboxylic acid produced in the technique of the present invention is preferably chosen from p-phthalic acid, phthalic acid and isophthalic
Dioctyl phthalate.Aromatic dicarboxylic acid is preferably p-phthalic acid.Hydrocarbon presoma is can be oxidized to form aromatic dicarboxylic acid
Compound.Therefore, by such as during hydrocarbon presoma is usually the position of the carboxylic acid substituent in required end product
C1-6The substituted benzene of group or the naphthalenes such as alkyl, formoxyl or acetyl group.Preferably hydrocarbon presoma is through C1-6Alkyl is substituted
Benzene, especially xylol.Organic solvent is usually aliphatic carboxylic acid (such as acetic acid), or this type of aliphatic carboxylic acid with
The mixture of water.Can oxygen can any under the conditions of carry out oxidation reaction, the most described reaction can be carried out in atmosphere.
Catalysts generally includes cobalt and/or manganese (such as its acetate), wherein bromine source (the such as hydrogen bromide) of soluble form
As accelerator.The temperature of oxidation reaction is generally at about 100-250 DEG C, in the range of preferably about 150-220 DEG C.Any
Normal pressures can be used for described reaction, suitably reactant mixture is maintained liquid condition.
Oxidation stage performs to be catalyzed in organic solvent the function of oxygenated hydrocarbon presoma, therefore forms product stream and discharges gas.
Product stream is typically transferred to crystallization stage to form the first serosity and the overhead vapor of rough aromatic dicarboxylic acid crystal.Rough
First serosity of aromatic dicarboxylic acid crystal is typically passed through to separate (or solvent exchange) stage, wherein by mother solution with rough
Aromatic dicarboxylic acid crystal separate, described rough aromatic dicarboxylic acid crystal then can with liquid, aqueous mix to be formed rough
Second serosity of aromatic dicarboxylic acid crystal.This second serosity of rough aromatic dicarboxylic acid crystal is typically transferred to purification and sets
Standby, heated and stood hydrogenation, cooled down subsequently to form the serosity of purified aromatic dicarboxylic acid crystal.Warp
Purified aromatic dicarboxylic acid crystal is reclaimed from described serosity by the method for a first aspect of the present invention.
Therefore, in the technique of the present invention, via the method for a first aspect of the present invention by the purified aromatic series of solid
Dicarboxylic acids separates with liquid (suitably for liquid, aqueous).Therefore, filter reel in filter reel cleaning area
Outer surface includes the cleaned purified aromatic dicarboxylic acid of residual volume, and cleans fluid output from filter reel
Clean fluid suitably for or include the serosity of cleaned purified aromatic dicarboxylic acid in described cleaning fluid.
Described serosity can include about 1 to about 50 weight % (gross weight based on described serosity) in described cleaning fluid, or about 2.5
To about 45 weight %, or about 5 to about 40 weight %, or about 7.5 to about 35 weight %, preferably about 10 to about 30
The cleaned purified aromatic dicarboxylic acid of weight %.
Gas of discharging from oxidation stage is generally separated into the liquid stream rich in organic solvent and rich in water in the distillation stage
Steam stream.The stream rich in organic solvent from the distillation stage generally includes 80-95%w/w organic solvent and generally returns
To oxidation stage.The steam flow rich in water from the distillation stage often includes 0.1-5.0%w/w organic solvent and generally exists
Condensation phase is condensed into condensate flow and top gas.A part for condensate flow is typically used as being formed above-mentioned rough
The liquid, aqueous source of the second serosity of aromatic dicarboxylic acid crystal.A part for condensate flow be also usually formed for from
The source cleaning fluid of the purified aromatic dicarboxylic acid crystal of purifier apparatus.In particular, condensate flow can form this
The step (iii) of the method for the first aspect of invention and/or the source cleaning fluid of step (v).
In discharge region from the cleaned purified aromatic dicarboxylic acid of the outer surface discharge of filter reel suitably
Transfer to exsiccator to remove remaining cleaning fluid.The purified aromatic dicarboxylic acid of gained is commonly used to manufacture poly-subsequently
(ethylene terephthalate).
The present invention will be further described with reference to Fig. 2.
The cross section of the rotary filter 10 provided in Fig. 2 shows a series of five districts, and shell 20 is drawn around its circumference
It is divided into described five districts: loading area 30, solid cleaning area 40, dry section 50, discharge region 60 and filter reel clean
District 70.In use, by the mixture (such as serosity) of solid and liquid being incorporated into via loading area input 32
By in solids laden to the outer surface of filter reel 12 in loading area 30.Solid is collected in filter unit 14
Filter cloth on, and liquid filtrate by filter unit 14 and via excretory duct 16 transfer to control head 18.Liquid
Filtrate can return to produce the manufacturing process of mixture, is further processed, or is dropped.
Filter reel encloses in direction a and is rotated about their axes, thus causes solid on the outer surface of filter reel 12
It is sent in solid cleaning area 40.With via solid on the outer surface of the filter reel 12 in solid cleaning area 40
Clean the cleaning fluid cleaning solid that fluid input 42 is incorporated in solid cleaning area 40.It is similar to liquid filtrate, cleans
Fluid is transferred to control head 18 by filter unit 14 and via excretory duct 16.This cleans fluid and can be directed into separately
The cleaning fluid input of one solid cleaning area (not shown), or be removed for processing further or disposing.Along with filtration
Device reel continues to enclose in direction a to be rotated about their axes, and solid is sent to dry section on the outer surface of filter reel 12
In 50, wherein it is dried gas with the solid on the outer surface of device for drying and filtering reel 12 via dry gas input 52 introducing.
Along with filter reel continues to enclose in direction a to be rotated about their axes, solid transmits on the outer surface of filter reel 12
To discharge region 60.Solid is wiped off for being collected in chute 64 by cutter 62 from the outer surface of filter reel 12.
The outer surface of filter reel 12 completely rotates the final district passed through in direction a for filtering around its axle
Device reel cleaning area 70.The outer surface of filter reel 12 is used to inherent filtration device reel and cleans the cleaning of fluid input 72
The remaining cleaned solid that fluid is rinsed to remove on filter cloth or is embedded in filter cloth.Including remaining warp
This cleaning fluid of the solid cleaned is collected in filter reel and cleans in fluid output 74 and be directed to solid cleaning stream
Body input 42.
Claims (20)
1. a rotary filter, comprising:
A) filter reel, it positions in the enclosure and can enclose in a first direction in described shell and is rotated about their axes；
B) loading area, it is for by the outer surface of solids laden to described filter reel；
C) discharge region, it is for discharging solid from the described outer surface of described filter reel；
D) the first solid cleaning area, its be positioned at described discharge region in said first direction before and described loading area it
After, and include being configured to drawing the on the drought solid to the described outer surface of described filter reel by cleaning fluid
One solid cleans fluid input；And
E) filter reel cleaning area, before it is positioned at described loading area in said first direction and described discharge region
Afterwards, and include being configured to drawing the drought filter reel to described filter reel by cleaning fluid to clean fluid defeated
Enter, and the filter reel being configured to clean from described filter reel fluid input collection cleaning fluid cleans fluid
Output,
Described rotary filter is characterised by, described rotary filter is configured to cleaning fluid from described mistake
Filter reel cleans fluid output and is delivered to described first solid cleaning fluid input.
2. the method in rotary filter, solid separated with liquid, it comprises the following steps:
I () by being incorporated into the outer surface of filter reel in loading area by the mixture of described solid and described liquid
Upper and by described solids laden to the described outer surface of described filter reel, wherein said filter reel is positioned at
In shell and can enclose in a first direction in described shell and be rotated about their axes；
(ii) make described filter reel enclose in described shell in said first direction to be rotated about their axes；
(iii) in the first solid cleaning area, described mistake is cleaned with the cleaning fluid cleaning fluid input from the first solid
Described solid on the described outer surface of filter reel；
(iv) cleaned solid is discharged from the described outer surface of described filter reel；And
V () is used for inherent filtration device reel in filter reel cleaning area and cleans described in the cleaning fluid cleaning that fluid inputs
The described outer surface of filter reel and collect described cleaning fluid in filter reel cleans fluid output,
Described method is characterised by, described method further includes steps of
(vi) the described cleaning fluid collected in the described filter reel cleaning fluid output of step (v) is drawn drought to arrive
Described first solid of step (iii) cleans fluid input.
Rotary filter the most according to claim 1 or method according to claim 2, wherein said mistake
The described outer surface of the described filter reel in filter reel cleaning area includes the cleaned solid of residual volume, and from
Described filter reel cleans the described cleaning fluid of fluid output and is or includes cleaned the consolidating in described cleaning fluid
The serosity of body.
Rotary filter the most according to claim 3 or method, wherein said serosity includes in described cleaning fluid
About 1 to about 50 weight %, the cleaned solid of preferably about 10 to about 30 weight %.
5., according to the rotary filter described in arbitrary aforementioned claim or method, wherein said rotary filter is joined
It is set in the case of without intermediate treatment the cleaning fluid cleaning fluid output from described filter reel is delivered to institute
State the first solid and clean fluid input to revise the chemical property of described cleaning fluid.
6., according to the rotary filter described in arbitrary aforementioned claim or method, wherein said filter reel cleans stream
Body input is configured to clean cleaning fluid is drawn drought to described filter reel.
7., according to the rotary filter described in arbitrary aforementioned claim or method, wherein said cleaning fluid is water.
8., according to the rotary filter described in arbitrary aforementioned claim or method, wherein said filter reel cleans stream
Body input is configured to draw drought to the described outer surface of described filter reel by cleaning fluid.
9., according to the rotary filter described in arbitrary aforementioned claim or method, wherein said rotary filter includes
Second solid cleaning area.
Rotary filter the most according to claim 9 or method, wherein said second solid cleaning area is described
Before being positioned at described first solid cleaning area on one direction and after described loading area.
11. according to the rotary filter described in arbitrary aforementioned claim or method, and it further includes at described first party
Solid dry section after before being upwards positioned at described discharge region and described first solid cleaning area.
12. include enclosing according to the rotary filter described in arbitrary aforementioned claim or method, wherein said filter reel
Multiple filter units around its circumference.
13. is liquid according to the rotary filter described in arbitrary aforementioned claim or method, wherein said rotary filter
Pressure rotary filter.
14. include aromatic series dicarboxyl according to the method described in any claim in claim 2-13, wherein said solid
Acid, it is therefore preferable to purified aromatic dicarboxylic acid.
15. methods according to claim 14, wherein said aromatic dicarboxylic acid is p-phthalic acid.
16. 1 kinds of techniques being used for producing purified aromatic dicarboxylic acid, it includes the catalysis of hydrocarbon presoma in organic solvent
Oxidation, described technique comprises the following steps:
I) in the case of there is metallic catalyst, in described organic solvent, described hydrocarbon presoma is aoxidized to provide rough
Aromatic dicarboxylic acid and discharge gas；And
II) rough aromatic dicarboxylic acid described in purification is to obtain described purified aromatic dicarboxylic acid,
Wherein said technique farther includes to incite somebody to action via according to the method described in any claim in claim 2-15
The step that the purified aromatic dicarboxylic acid of solid separates with liquid.
17. techniques according to claim 16, the described filter reel in wherein said filter reel cleaning area
Described outer surface include the cleaned purified aromatic dicarboxylic acid of residual volume, and clear from described filter reel
The cleaned purified aromatic series dicarboxyl that the described cleaning fluid of wash body output is or includes in described cleaning fluid
The serosity of acid.
18. techniques according to claim 17, wherein said serosity includes in described cleaning fluid about 1 to about 50
Weight %, the cleaned purified aromatic dicarboxylic acid of preferably about 10 to about 30 weight %.
19. according to the technique described in any claim in claim 16-18, and it further includes steps of
III) by from step I in the distillation stage) described discharge gas be separated into the liquid stream rich in organic solvent and richness
Aqueous steam stream；And
IV) condensate flow will be condensed into from steam stream rich in water described in the described distillation stage in condensation phase；
The source of the described cleaning fluid of wherein said condensate flow forming step (v).
20. techniques according to claim 19, the described cleaning of wherein said condensate flow also forming step (iii)
The source of fluid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB1508411.4A GB201508411D0 (en) | 2015-05-15 | 2015-05-15 | Filter |
| GB1508411.4 | 2015-05-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106139696A true CN106139696A (en) | 2016-11-23 |
Family
ID=53505883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610322175.3A Pending CN106139696A (en) | 2015-05-15 | 2016-05-16 | Filter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106139696A (en) |
| GB (1) | GB201508411D0 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1231635A (en) * | 1967-09-14 | 1971-05-12 | ||
| CN1066841A (en) * | 1991-04-12 | 1992-12-09 | 阿莫科公司 | Be used to reclaim improving one's methods of pure terephthalic acid (PTA) |
| CN1099312A (en) * | 1993-05-24 | 1995-03-01 | 三井石油化学工业株式会社 | Method and apparatus for recovering crystals from slurry |
| CN201534023U (en) * | 2009-10-17 | 2010-07-28 | 兰州瑞德干燥技术有限公司 | Filtering, washing and drying integrated continuous pressure filter |
| EP2522414A1 (en) * | 2011-05-11 | 2012-11-14 | Siemens Aktiengesellschaft | Filter device, method for its operation and usage |
| CN202715303U (en) * | 2012-06-27 | 2013-02-06 | 江苏赛德力制药机械制造有限公司 | Pressurized rotary drum filter |
-
2015
- 2015-05-15 GB GBGB1508411.4A patent/GB201508411D0/en not_active Ceased
-
2016
- 2016-05-16 CN CN201610322175.3A patent/CN106139696A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1231635A (en) * | 1967-09-14 | 1971-05-12 | ||
| CN1066841A (en) * | 1991-04-12 | 1992-12-09 | 阿莫科公司 | Be used to reclaim improving one's methods of pure terephthalic acid (PTA) |
| CN1099312A (en) * | 1993-05-24 | 1995-03-01 | 三井石油化学工业株式会社 | Method and apparatus for recovering crystals from slurry |
| CN201534023U (en) * | 2009-10-17 | 2010-07-28 | 兰州瑞德干燥技术有限公司 | Filtering, washing and drying integrated continuous pressure filter |
| EP2522414A1 (en) * | 2011-05-11 | 2012-11-14 | Siemens Aktiengesellschaft | Filter device, method for its operation and usage |
| CN202715303U (en) * | 2012-06-27 | 2013-02-06 | 江苏赛德力制药机械制造有限公司 | Pressurized rotary drum filter |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201508411D0 (en) | 2015-07-01 |
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Application publication date: 20161123 |