CN209128345U - A kind of PTA energy saving device - Google Patents
A kind of PTA energy saving device Download PDFInfo
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- CN209128345U CN209128345U CN201821296777.7U CN201821296777U CN209128345U CN 209128345 U CN209128345 U CN 209128345U CN 201821296777 U CN201821296777 U CN 201821296777U CN 209128345 U CN209128345 U CN 209128345U
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 57
- 238000006243 chemical reaction Methods 0.000 claims abstract description 55
- 238000002156 mixing Methods 0.000 claims abstract description 36
- 230000003647 oxidation Effects 0.000 claims abstract description 34
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims abstract description 14
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 42
- 239000012530 fluid Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 6
- 229940071125 manganese acetate Drugs 0.000 abstract description 6
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 abstract description 6
- RVHSTXJKKZWWDQ-UHFFFAOYSA-N 1,1,1,2-tetrabromoethane Chemical compound BrCC(Br)(Br)Br RVHSTXJKKZWWDQ-UHFFFAOYSA-N 0.000 abstract description 5
- 229940011182 cobalt acetate Drugs 0.000 abstract description 5
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000001590 oxidative effect Effects 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 23
- 239000007789 gas Substances 0.000 description 20
- 239000000463 material Substances 0.000 description 9
- 239000012452 mother liquor Substances 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- 239000012535 impurity Substances 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 238000003541 multi-stage reaction Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- GOUHYARYYWKXHS-UHFFFAOYSA-N 4-formylbenzoic acid Chemical compound OC(=O)C1=CC=C(C=O)C=C1 GOUHYARYYWKXHS-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000007086 side reaction Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- ZWLPBLYKEWSWPD-UHFFFAOYSA-N o-toluic acid Chemical compound CC1=CC=CC=C1C(O)=O ZWLPBLYKEWSWPD-UHFFFAOYSA-N 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- RDHPKYGYEGBMSE-UHFFFAOYSA-N bromoethane Chemical compound CCBr RDHPKYGYEGBMSE-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000012066 reaction slurry Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a kind of PTA energy saving devices, by adding the homogeneous premixing reaction device of a hypergravity between charging mixing arrangement and oxidation reactor, the homogeneous premixing reaction device of hypergravity includes motor, shell, end cap, shaft, rotor, stationary ring and charging jet pipe.Rotor includes rotating disk and rotating ring；Rotating ring includes the internal layer rotating ring for being sequentially coaxially sleeved on shaft periphery from the inside to the outside, intermediate rotating ring and outer layer rotating ring.The utility model passes through the homogeneous premixing reaction device of hypergravity added, to oxidation reaction process tool, there are two effects: mixture is secondary mixes for 1. paraxylene, solvent acetic acid, catalyst (cobalt acetate, manganese acetate, promotor tetrabromoethane), improves mixing evenness.2. being passed through air initiated oxidation reaction, improves oxidizing reaction rate in oxidation reactor, improves main reaction yield；Shorten the cooling time, reduces the evaporation capacity of solvent acetic acid.
Description
Technical field
The utility model relates to a kind of PTA process units, especially a kind of PTA energy saving device.
Background technique
Existing p-phthalic acid's commercial plant oxidation reaction unit, before crude terephthalic acid oxidation reaction, paraxylene,
Acetic acid, the homogeneous of catalyst premix the technology mixed using traditional " in-tank mixing or static mixer ", and flow chart is shown in
Fig. 1.In the utility model, p-phthalic acid is together simply referred to as PTA, and crude terephthalic acid is together simply referred to as CTA, paraxylene
Together simply referred to as PX.
In PTA commercial plant oxidation reaction unit, as shown in Figure 1, raw material paraxylene, solvent acetic acid, catalyst (vinegar
Sour cobalt, manganese acetate, promotor tetrabromoethane) enter in charging charging mixing arrangement 1 by a certain percentage, charging here mixes dress
Setting can be blending tank, or static mixer etc..Mixed material is sent anti-to oxidation by the pressurization of mixed liquor charge pump 2
Device 3 is answered, under certain temperature, pressure, oxidation reaction is carried out with the air from compressor, since oxidation reaction generates largely
Heat vaporizes partial solvent acetic acid and material, and vaporized gas enters the condensation of condenser 4, and condensate liquid flows back into oxidation again
Reactor 3, not condensed gas drain into subsequent recovery workshop section, and the TA slurry of generation is extracted out from the discharging of oxidation reactor 3, into
Enter crystallizing tank 5 and carry out secondary oxidation and crystallization, the reacted slurry pump 6 of TA slurry enters 7 mistake of filter after being pressurized after decrease temperature and pressure
Filter is condensed into TA filter cake and enters drying system, and filtrated stock enters mother liquor tank 8 and returns to charging mixing after 9 pressurization of mother liquor reuse pump
Device 1 is recycled.
However, above-mentioned PTA commercial plant oxidation reaction unit technology has much room for improvement there is also deficiency.
PX oxidation reaction is more complex chemical reaction, during the reaction, shares the reaction of two classes and occurs, one kind is main anti-
It answers, PX is oxidized to paraxylene under high temperature, excessive oxygen and high-intensitive stirring condition；It is another kind of, it is same with main reaction
The side reaction of Shi Fasheng, main side reaction are the combustion reactions of solvent acetic acid and raw material PX.
Using charging mixing arrangement to raw material paraxylene, solvent acetic acid, catalyst (cobalt acetate, manganese acetate, promotor four
Bromoethane) by a certain percentage mixing when, incorporation time is shorter, and homogeneous mixed effect is poor, into oxidation reactor after easily occur it is secondary
Reaction, production carbon monoxide, carbon dioxide and water, influences the yield of main reaction；Meanwhile because main reaction and side reaction process are all
Exothermic process, and the cooling in reaction process is taken away mainly by acetic acid vaporization, solvent-oil ratio is larger.
Utility model content
The technical problems to be solved in the utility model is in view of the above shortcomings of the prior art, and to provide a kind of PTA energy conservation
Consumption reducing device, the PTA energy saving device mention while homogeneously premixing the mixing evenness of reaction before improving CTA oxidation reaction
Oxidizing reaction rate, raising main reaction yield in high oxidation reactor；The pressure and temperature of oxidation reactor is reduced, acetic acid is reduced
Consumption.
In order to solve the above technical problems, the technical solution adopted in the utility model is:
A kind of PTA energy saving device, including charging mixing arrangement, the homogeneous premixing reaction device of hypergravity and oxidation reaction
Device；The homogeneous premixing reaction device setting of hypergravity is between charging mixing arrangement and oxidation reactor.
Charging mixing arrangement is for raw material paraxylene, solvent acetic acid and catalyst to be tentatively pre-mixed.
The homogeneous premixing reaction device of hypergravity includes motor, shell, end cap, shaft, rotor, stationary ring and charging jet pipe.
Shell is coaxially coated on rotor outer periphery, and end cap seal lid is closed in shell side.
Gas access and liquid outlet are provided on shell, gas access is perpendicular with shell, and liquid outlet and oxidation are anti-
The liquid inlet of device is answered to be connected；Be provided with liquid inlet and gas vent on end cap, liquid inlet by mixed liquor charge pump with
The liquid outlet of charging mixing arrangement is connected.
One end of shaft, which is connected to the motor, to be connect, and the other end of shaft is worn from the central axis of shell, rotor and end cap respectively
It crosses, is sealing rotation connection between shaft and shell and end cap.
Rotor includes rotating disk and rotating ring；Rotating disk is coaxially fixedly set in shaft periphery, rotating ring include from the inside to the outside according to
Internal layer rotating ring, intermediate rotating ring and outer layer rotating ring, the quantity of intermediate rotating ring of the secondary coaxial package in shaft periphery are at least one；It is dynamic
One end of ring is connected with rotating disk；Runner hole is laid on rotating ring；External seal chamber is formed between outer layer rotating ring and shell,
External seal chamber is connected with gas access and liquid outlet respectively；It is formed between internal layer rotating ring and shaft and is connected with gas vent
Interior seal chamber.
Charging jet pipe is circumferentially laid between internal layer rotating ring and the intermediate rotating ring adjoining with internal layer rotating ring, and feeds spray
The spray orifice of pipe rotating ring towards the middle；Every charging jet pipe is connected with the feeding pipe at liquid inlet.
When intermediate rotating ring is one, a stationary ring is set between intermediate rotating ring and outer layer rotating ring；When intermediate rotating ring is two
When a above, respectively setting one is quiet between two neighboring intermediate rotating ring and between outer layer rotating ring and adjacent intermediate rotating ring
Ring；One end of stationary ring is connected with end cap.
Stationary ring forms stationary ring fluid course by the circumferentially evenly distributed formation of several cylinders between adjacent two cylinders.
One end of rotating ring is detachably connected with rotating disk.
One end of stationary ring is detachably connected with end cap.
Feeding mixing arrangement is blending tank or static mixer.
Catalyst is one of cobalt acetate, manganese acetate or promotor tetrabromoethane or combination.
The utility model has the following beneficial effects:
1. promoting paraxylene, solvent acetic acid, catalyst (cobalt acetate, manganese acetate, promotor tetrabromoethane) mixture two
It is secondary to mix, improve mixing evenness.
2. greatly strengthening mass transfer, heat transfer in mixed process, partial oxidation reaction is carried out.
3. being passed through air initiated oxidation reaction, improves oxidizing reaction rate in oxidation reactor, improves main reaction yield；Drop
The pressure and temperature of suboxides reactor reduces acetic acid consumption.
Detailed description of the invention
Fig. 1 shows a kind of structural schematic diagram of PTA commercial plant in the prior art.
Fig. 2 shows a kind of structural schematic diagram of PTA energy saving device in the utility model.
Fig. 3 shows that the homogeneous premixing reaction device of hypergravity is parallel to the vertical section schematic diagram of shaft.
Fig. 4 shows the homogeneous premixing reaction device of hypergravity perpendicular to the vertical section schematic diagram of shaft.
Fig. 5 shows PX oxidation reaction stepwise reaction equation.
Wherein have: 1. charging mixing arrangements；2. mixed liquor charge pump；3. oxidation reactor；4. condenser；5. crystallizing tank；
6. reaction slurry pumps；7. filter；8. mother liquor tank；9. mother liquor reuse pumps；10. the homogeneous premixing reaction device of hypergravity.
11. motor；12. shell；121. gas access；122. liquid inlet；13. mechanical seal；14. end cap；141. liquid
Body entrance；142. gas vent；143 stationary rings；144. charging jet pipes；151. rotating disk；152. rotating ring；1521. outer layer rotating ring；
1522. intermediate rotating ring；1523. internal layer rotating ring；16. shaft；17. bearing.
Specific embodiment
The utility model is described in further detail with specific better embodiment with reference to the accompanying drawing.
As shown in Fig. 2, a kind of PTA energy saving device, including charging mixing arrangement 1, the homogeneous premixing reaction of hypergravity
Device 10, oxidation reactor 3, condenser 4, crystallizing tank 5, filter 7 and mother liquor tank 8.
Charging mixing arrangement is preferably blending tank or static mixer etc., for by raw material paraxylene, solvent acetic acid and
Catalyst is tentatively pre-mixed.Wherein, catalyst is preferably one of cobalt acetate, manganese acetate or promotor tetrabromoethane etc.
Or combination.
The homogeneous premixing reaction device setting of hypergravity is between charging mixing arrangement and oxidation reactor.
Oxidation reactor 3, condenser 4, crystallizing tank 5, filter 7 and mother liquor tank 8 laying mode be the prior art, here
It repeats no more.
As shown in Figure 3 and Figure 4, the homogeneous premixing reaction device of hypergravity include motor 11, shell 12, end cap 14, shaft 16,
Rotor, stationary ring 143 and charging jet pipe 144.
Shell is coaxially coated on rotor outer periphery, and end cap seal lid is closed in shell side.
Gas access 121 and liquid outlet 122 are provided on shell, gas access is perpendicular with shell, liquid outlet with
The liquid inlet of oxidation reactor is connected.
Liquid inlet 141 and gas vent 142 are provided on end cap, liquid inlet passes through mixed liquor charge pump 2 and charging
The liquid outlet of mixing arrangement is connected.
One end of shaft preferably passes through shaft coupling and is connected with motor 11, the other end of shaft respectively from shell, rotor and
The central axis of end cap passes through, and preferably is formed as sealing using bearing 17 and mechanical seal 13 between shaft and shell and end cap
Rotation connection.
Rotor includes rotating disk 151 and rotating ring 152.
Rotating disk is coaxially fixedly set in shaft periphery, and rotating ring includes sequentially coaxially being sleeved on shaft periphery from the inside to the outside
Internal layer rotating ring 1523, intermediate rotating ring 1522 and outer layer rotating ring 1521, the quantity of intermediate rotating ring are at least one, preferably two with
On.
One end of rotating ring is connected with rotating disk, is preferably detachably connected.Runner hole is laid on rotating ring；Outer layer
External seal chamber 153 is formed between rotating ring and shell, external seal chamber is connected with gas access and liquid outlet respectively；Internal layer rotating ring
The interior seal chamber 154 being connected with gas vent is formed between shaft.
Charging jet pipe is circumferentially laid between internal layer rotating ring and the intermediate rotating ring adjoining with internal layer rotating ring, and feeds spray
The spray orifice of pipe rotating ring towards the middle；Every charging jet pipe is connected with the feeding pipe at liquid inlet.
When intermediate rotating ring is one, a stationary ring is set between intermediate rotating ring and outer layer rotating ring.
When intermediate rotating ring is more than two, between two neighboring intermediate rotating ring and outer layer rotating ring and adjacent centre is moved
One stationary ring is respectively set between ring；One end of stationary ring is connected with end cap, is preferably detachably connected.
For stationary ring by the circumferentially evenly distributed formation of several cylinders, one end of every cylindrical body is preferably detachable with end cap
It connects, forms stationary ring fluid course between adjacent two cylinders.
The working principle of the homogeneous premixing reaction device of hypergravity
In the homogeneous premixing reaction device 10 of hypergravity, air enters shell from air intake, and from rotor outer ring to turning
Subcenter movement, mixed liquor enters rotor center by liquid inlet, under the influence of centrifugal force from rotor center to rotor outer ring
It throws away, in this way, mixed liquor is contacted with air inversion, oxidation reaction occurs while mixing, the slurry mixed liquor after reaction
Being discharged into oxidation reactor 3 by housing bottom liquid outlet nozzle, the reaction was continued, the acetic acid steam evaporated in reaction process
It is discharged into condenser 4 from top to condense, condensed acetic acid liquid self-flowing is recycled into oxidation reactor 3.
The homogeneous premixing reaction device 10 of hypergravity not only has the homogeneous immixture of forced fluid liquid, while also having gas-liquid mass transfer
Effect, that is, improve the power of oxidation reaction, and has the function of anti-blocking, guarantees long period, the efficient operation of equipment.
It is every in process fluid flow to pass through one group of rotating ring-stationary ring just in homogeneous 10 shell of premixing reaction device of hypergravity
It redistributes once, is equivalent to the series connection in multiple mass transfer end effects area.Fluid between fixed-rotor is made by high shear
With enhancing the mixed effect between drop and drop.
The homogeneous premixing reaction device of hypergravity uses stationary ring, rotor configuration, prevents solid particulate matter obstruction, forced fluid
Liquid mass transfer, gas-liquid mass transfer, the advantage for strengthening micro mixing, structure are described as follows:
1. the homogeneous premixing reaction device basic structure of hypergravity is formed by stationary ring (namely stator) and rotor are chimeric, stationary ring is solid
It is scheduled on end cap, rotor includes multilayer rotating ring, rotating ring and the radially spaced arrangement of stationary ring, forms rotating ring-stationary ring alternately chimeric knot
Structure.
2. in the homogeneous premixing reaction device of hypergravity, liquid is every in flow process to be needed again by one group of rotating ring-stationary ring
Distribution is primary, is equivalent to multiple end effect area series connection in hypergravity equipment, further enhances mixing and mass transport process.
3. non-filling in the homogeneous premixing reaction device of hypergravity, while liquid by high shear is in height between stationary ring-rotor
Turbulence state is spent, there is automatic cleaning action, be not in clogging for high-viscosity material or crystalline deposit system.
4. using releasable connection side between the rotating ring and rotator seat and stationary ring and end cap of the homogeneous premixing reaction device of hypergravity
Formula, assembling and convenient disassembly, same equipment are assembled by different structures, applicable different requirement.
5. structure is simple without sealing in complicated gas phase inside the homogeneous premixing reaction device of hypergravity.
Homogeneous premixing method before a kind of CTA oxidation reaction, includes the following steps.
Step 1, preliminary premixing: raw material paraxylene, solvent acetic acid and catalyst enter charging mixing by a certain percentage
Device is tentatively pre-mixed.
Step 2, homogeneous premixing: the material through being tentatively pre-mixed is sent homogeneously pre- to hypergravity by the pressurization of mixed liquor charge pump
It is homogeneously pre-mixed in mixing reactor, homogeneous premixing includes the following steps.
Step 21, liquid pan feeding: rotor rotation, liquid of the material being tentatively pre-mixed from the homogeneous premixing reaction device of hypergravity
Body entrance enters, and is uniformly delivered to each charging between internal layer rotating ring and the intermediate rotating ring adjoining with internal layer rotating ring
In jet pipe.
Step 22, droplets mixing: under the action of the discharge pressure of mixed liquor charge pump and centrifugal force, liquid material will
Away from the movement of internal layer rotating ring, namely first pass through the runner hole on the intermediate rotating ring adjoining with internal layer rotating ring, then into
Enter the stationary ring fluid course in stationary ring, then successively pass through intermediate rotating ring, stationary ring again, until reaching outer layer rotating ring；Liquid material
Every combination by a rotating ring and stationary ring, due to just will once be redistributed by shear action.
Step 23, mix: while step 22 droplets mixing, air in compressor, will from gas access into
Enter external seal chamber, then enters the stationary ring fluid course in stationary ring from the runner hole on outer layer rotating ring, successively flow inward into, and with
By the drop counter current contacting of shear action in step 22, mix, while oxidation reaction occurs；Homogeneous hybrid reaction process
The gas phase of middle generation enters the condensation of condenser 4；Slurry mixed liquor after reaction is discharged into oxygen by the liquid outlet of housing bottom
Change reactor, under certain temperature, pressure, oxidation reaction is carried out with the air from compressor, since oxidation reaction generates greatly
The heat of amount vaporizes partial solvent acetic acid and material, and vaporized gas is discharged into condenser condensation from top, after condensation
Acetic acid liquid self-flowing be recycled into oxidation reactor, not condensed gas drains into subsequent recovery workshop section, the TA of generation
Slurry is extracted out from oxidation reactor discharging, carries out secondary oxidation and crystallization into crystallizing tank, TA slurry is through anti-after decrease temperature and pressure
Enter filter filtering and concentrating after answering slurry pump to be pressurized and enter drying system at TA filter cake, filtrated stock enters mother liquor tank through mother liquor
Blending tank (or static mixer) recycling is returned to after reuse pump pressurization.
PX oxidation is the core of PTA device, selects suitable oxidation reaction condition, is to reduce raw and auxiliary material consumption, reduce
Byproduct generates and improves the deciding factor of product quality, and optimization reaction condition becomes the commanding elevation of technological development.React item
The general trend of piece optimization is to reduce reaction pressure and temperature, improves catalyst concn and improves catalyst, accelerator ratio.
PX oxidation reaction stepwise reaction equation is as shown in Figure 5.
The critically important precondition of the oxidation reaction of PX is liquid phase mass transfer problem.Existing PTA prevailing technology uses kettle
Formula stirred reactor, gas enter reaction kettle from reactor lower part, realize that liquid phase uniformly mixes by stirring.
The process characteristic of the utility model is homogeneously to be pre-mixed instead before liquid phase enters oxidation reactor in hypergravity
Progress liquid phase in device is answered to be sufficiently mixed and carry out part reaction, gas-liquid homogeneous mixture enters further anti-in oxidation reactor
It answers.
Research shows that methyl benzoic acid (PT acid) oxidation is speed during following two fact 1.PX oxidation stepwise reaction
Most slow single step reaction；2. impurity (PT acid, 4-CBA etc.) generates the PTA due to generating in reaction process during stepwise reaction
Crystal wraps up impurity, hinders the further oxidation of impurity.
PX → TALD → PT acid → 4-CBA → PTA may be implemented in the homogeneous premixing reaction device of the hypergravity of the utility model
Part stepwise reaction, material enters the intermediate product partial size very little (nanoscale) of oxidation reactor, high-intensitive shear action
The intermediate product of big crystal grain is prevented to be formed.Subsequent material gas-liquid in oxidation reactor comes into full contact with reaction, same temperature,
Pressure, catalysts conditions decline low impurity content.
In PTA oxidation process using higher temperature, pressure major reason be need to improve reaction rate, reduce impurity contain
Amount.The utility model can effectively improve existing oxidizing reactor reaction rate by strengthening mass transport process, reduce impurity content.
Studies have shown that 5%, 4-CBA and PT can be improved in present reactor production capacity in the case where the other conditions of present reactor are constant
The content of impurities such as acid can reduce by 20%.
Preferred embodiments of the present invention are described in detail above, still, the utility model is not limited to above-mentioned reality
Apply the detail in mode, in the range of the technology design of the utility model, can to the technical solution of the utility model into
The a variety of equivalents of row, these equivalents belong to the protection scope of the utility model.
Claims (4)
1. a kind of PTA energy saving device, it is characterised in that: including feeding mixing arrangement, the homogeneous premixing reaction device of hypergravity
And oxidation reactor；The homogeneous premixing reaction device setting of hypergravity is between charging mixing arrangement and oxidation reactor；
Charging mixing arrangement is for raw material paraxylene, solvent acetic acid and catalyst to be tentatively pre-mixed；
The homogeneous premixing reaction device of hypergravity includes motor, shell, end cap, shaft, rotor, stationary ring and charging jet pipe；
Shell is coaxially coated on rotor outer periphery, and end cap seal lid is closed in shell side；
Gas access and liquid outlet are provided on shell, gas access is perpendicular with shell, liquid outlet and oxidation reactor
Liquid inlet be connected；Liquid inlet and gas vent are provided on end cap, liquid inlet passes through mixed liquor charge pump and charging
The liquid outlet of mixing arrangement is connected；
One end of shaft, which is connected to the motor, to be connect, and the other end of shaft is passed through from the central axis of shell, rotor and end cap respectively, is turned
It is sealing rotation connection between axis and shell and end cap；
Rotor includes rotating disk and rotating ring；Rotating disk is coaxially fixedly set in shaft periphery, and rotating ring includes successively same from the inside to the outside
Internal layer rotating ring, intermediate rotating ring and outer layer rotating ring, the quantity of intermediate rotating ring of the axle sleeve mounted in shaft periphery are at least one；Rotating ring
One end is connected with rotating disk；Runner hole is laid on rotating ring；External seal chamber is formed between outer layer rotating ring and shell, it is outer close
Envelope chamber is connected with gas access and liquid outlet respectively；Formation is connected interior with gas vent between internal layer rotating ring and shaft
Seal chamber；
Charging jet pipe is circumferentially laid between internal layer rotating ring and the intermediate rotating ring adjoining with internal layer rotating ring, and feeds jet pipe
Spray orifice rotating ring towards the middle；Every charging jet pipe is connected with the feeding pipe at liquid inlet；
When intermediate rotating ring is one, a stationary ring is set between intermediate rotating ring and outer layer rotating ring；When intermediate rotating ring be two with
When upper, a stationary ring was respectively set between two neighboring intermediate rotating ring and between outer layer rotating ring and adjacent intermediate rotating ring；It is quiet
One end of ring is connected with end cap；
Stationary ring forms stationary ring fluid course by the circumferentially evenly distributed formation of several cylinders between adjacent two cylinders.
2. PTA energy saving device according to claim 1, it is characterised in that: one end of rotating ring is removable with rotating disk
Unload connection.
3. PTA energy saving device according to claim 1 or 2, it is characterised in that: one end of stationary ring is removable with end cap
Unload connection.
4. PTA energy saving device according to claim 1, it is characterised in that: charging mixing arrangement is blending tank or quiet
State mixer.
Priority Applications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114887569A (en) * | 2022-05-23 | 2022-08-12 | 南通富莱克流体装备有限公司 | Gas-liquid-solid supergravity reinforced reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114887569A (en) * | 2022-05-23 | 2022-08-12 | 南通富莱克流体装备有限公司 | Gas-liquid-solid supergravity reinforced reactor |
| CN114887569B (en) * | 2022-05-23 | 2023-10-03 | 南通富莱克流体装备有限公司 | Gas-liquid-solid supergravity reinforced reactor |
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