CN206705998U - A kind of trimellitic anhydride rectifier unit - Google Patents
A kind of trimellitic anhydride rectifier unit Download PDFInfo
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- CN206705998U CN206705998U CN201720483394.XU CN201720483394U CN206705998U CN 206705998 U CN206705998 U CN 206705998U CN 201720483394 U CN201720483394 U CN 201720483394U CN 206705998 U CN206705998 U CN 206705998U
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- condenser
- rectifying column
- trimellitic anhydride
- trap
- vavuum pump
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Abstract
The utility model discloses a kind of trimellitic anhydride rectifier unit, including the first distillation still, first rectifying column, the first condenser, the first vavuum pump, it is additionally provided with after-fractionating kettle, Second distillation column, the second condenser and the second vavuum pump, and the first trap and the second trap, first trap connects with the top of the first condenser and the first vavuum pump respectively, and second trap connects with the top of the second condenser and the second vavuum pump respectively.The utility model is by way of two sets of rectifying columns are connected, so as to effectively reduce the height of rectifying column, reduce the energy consumption of rectifying column and improve the stability of equipment operation, simultaneously, by the design of filler, the power consumption of rectifying column is reduce further, greatly improves the rectification efficiency of trimellitic anhydride, and purity is more preferable, trimellitic anhydride rectifying field can be widely applied to.
Description
Technical field
Trimellitic anhydride production and processing field is the utility model is related to, is filled more particularly, to a kind of trimellitic anhydride rectifying
Put.
Background technology
Trimellitic anhydride (TMA) is the important source material of organic synthesis industry, can produce the chemicals of more performances, such as plasticizer
Trioctyl trimellitate (TOTM) (TOTM), polyester imine resin, water soluble paint and powdery paints etc..China generally utilizes pseudocumene
(TMB) Heavy Aromatic Hydrocarbons production trimellitic anhydride, trimellitic anhydride is prepared by liquid-phase air oxidation, using Co-Mn-Br to urge
Change system, using acetic acid as solvent, more than 200 DEG C, trimellitic acid is made under the environment below 2.3MPa pressure, then be dehydrated into
Acid anhydride obtains trimellitic anhydride crude product, re-refines to obtain product.Existing process for refining is made using rectifying processing, to reach foot
Enough purity, the height of packing layer is required very high in its rectifying column, and steam, which needs to reach overhead condensation by packing layer, to be separated
Trimellitic anhydride finished product can just be obtained.The height of packing layer is more next, and resistance is bigger so that and the power consumption of vavuum pump is also bigger, and
Steam flow velocity in rectifying column is low so that the efficiency of rectifying substantially reduces, and also further increases the energy consumption of equipment.
Utility model content
The purpose of this utility model is to provide a kind of trimellitic anhydride rectifier unit, solves existing trimellitic anhydride rectifying dress
It is low to put efficiency, the problem of high energy consumption.
Technical scheme is used by the utility model solves its technical problem：A kind of trimellitic anhydride rectifier unit, bag
Include the first distillation still, first rectifying column, the first condenser, the first vavuum pump, top and the first rectifying of first distillation still
The first gas phase pipe and the first bottom of towe return duct are provided between the bottom of tower, first condenser is arranged on the top of first rectifying column
Portion is simultaneously connected with first rectifying column pipeline, and crude product is provided with the first rectifying column and extracts pipe out；After-fractionating kettle is additionally provided with,
Second distillation column, the second condenser and the second vavuum pump, the crude product are extracted pipe out and are connected with after-fractionating kettle, the after-fractionating
The second gas phase pipe and the second bottom of towe return duct are provided between the top of kettle and the bottom of Second distillation column；Second condenser with
Connected at the top of Second distillation column, finished product is provided with the Second distillation column and extracts pipe out；
Be additionally provided with the first trap and the second trap, first trap respectively with the top of the first condenser and
First vavuum pump connects, and second trap connects with the top of the second condenser and the second vavuum pump respectively.
Further, the height of the first rectifying column is 5.5~6m, and the height of the Second distillation column is 9~10m.
Further, be provided with filler in the first rectifying column and Second distillation column, filler include ceramic corrugated plate and
Ceramic flat plate, the section waveform of the ceramic corrugated plate is sine and cosine wave structure, and the wavelength of sine and cosine ripple is 1.5~2mm.
Preferably, ceramic corrugated plate and ceramic flat plate is stated alternately to be stacked, and the ripple of two neighboring ceramic corrugated plate
Line prismatic incline direction is opposite.
As another embodiment, two ceramic corrugated plates, and two are provided between the adjacent two ceramic flat plate
The ripple prismatic incline direction of ceramic corrugated plate is opposite.
For convenience of regulation vacuum, first vavuum pump and the second vavuum pump are Roots vacuum system, in Roots vacuum
Regulating valve is provided with the pipeline that unit is connected with the first trap and the second trap.
The beneficial effects of the utility model：The utility model is by setting two rectifying columns, point preliminary rectifying and finished product essence
Evaporate two steps to complete, the height of the rectifying column greatly reduced, reduce resistance of the steam in rectifying column, so as to effectively reduce
Time of the steam in rectifying column so that the power consumption of vavuum pump greatly reduces, meanwhile, it can also shorten time of whole rectifying,
Improve production efficiency.The structure design of the rectifying inner-tower filling material, the resistance that steam flows in filler is substantially reduced, improved
The flowing velocity of steam, so as to reduce the power consumption of condenser and vavuum pump, improve production efficiency.
Below with reference to drawings and examples, the utility model is described in detail.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the dimensional structure diagram one of filler in the utility model.
Fig. 3 is Fig. 2 partial side view.
Fig. 4 is the dimensional structure diagram two of filler in the utility model.
Fig. 5 is Fig. 4 partial side view.
Embodiment
Embodiment, as shown in Figures 1 to 3, a kind of trimellitic anhydride rectifier unit, including the first distillation still 1, first rectifying column
2, the first condenser 3, the first vavuum pump 4, is provided between the top of first distillation still 1 and the bottom of first rectifying column 2
One gas phase pipe 5 and the first bottom of towe return duct 6.First condenser 3 be arranged on the top of first rectifying column 2 and with the first rectifying
The pipeline of tower 2 is connected, and crude product is provided with the first rectifying column 2 and extracts pipe 7 out.It is additionally provided with after-fractionating kettle 11, the second rectifying
Tower 12, the second condenser 13 and the second vavuum pump 14, the crude product are extracted pipe 7 out and are connected with after-fractionating kettle 11, and described second steams
Evaporate and the second gas phase pipe 15 and the second bottom of towe return duct 16 are provided between the top of kettle 11 and the bottom of Second distillation column 12；Described
Two condensers 13 are connected with the top of Second distillation column 12, and finished product is provided with the Second distillation column 12 and extracts pipe 17 out.Described
The height of one rectifying column 2 is 5.5~6m, and the height of the Second distillation column 12 is 9~10m.First vavuum pump 4 and second
Vavuum pump 14 is Roots vacuum system, on the pipeline that Roots vacuum system is connected with the first trap 8 and the second trap 18
It is provided with regulating valve 10, the convenient dynamics for adjusting the first vavuum pump 4 and the second vavuum pump 14, the Roots vacuum system power consumption
It is low, stable performance, efficiently.
Be additionally provided with the first trap 8 and the second trap 18, first trap 8 respectively with the first condenser 3
Top and the first vavuum pump 4 connect, second trap 18 top with the second condenser 13 and the second vavuum pump 14 respectively
Connection.
Filler 9 is provided with the first rectifying column 2 and Second distillation column 12, filler 9 includes ceramic corrugated plate 91 and pottery
Porcelain flat plate 92, the section waveform of the ceramic corrugated plate 91 is sine and cosine wave structure, and the wavelength of sine and cosine ripple is 1.5~2mm.
The ceramic corrugated plate 91 and ceramic flat plate 92 are alternately stacked, and the ripple prismatic of two neighboring ceramic corrugated plate 91 inclines
Tilted direction is opposite.The filling-material structure can make flowing of the steam in filler more smoothly, reduce steam and stop in filler
The time is stayed, reduces the power consumption of condenser and vavuum pump.
When the present apparatus works, the trimellitic anhydride crude product in kettle enters the first distillation still 1, inclined benzene three by feed pipe
Acid anhydrides crude product mainly (mainly includes other the lower boiling cracking of diacid and part comprising trimellitic anhydride, heavy constituent, light component
Thing) and a small amount of on-condensible gas, heats the first distillation still 1, material enters first rectifying column 2 through the first gas phase pipe 5, and material is by the
Enter the first condenser 3 after filler 9 in one rectifying column 2, product flows under gravity after the condensation cooling of the first condenser 3
On the liquid phase distributor for entering first rectifying column 2, final product is flowed on the filler 9 of tower top section, and product from tower bottom with rising up into
Steam heat-exchanging obversion so that trimellitic anhydride separates with light component in light component, product after collecting tank is collected by
Crude product is extracted pipe 7 out and is flowed into after-fractionating kettle 11；Part light component and on-condensible gas are pumped to first by the first vavuum pump 4 and caught
In storage 8, on-condensible gas delivers to incinerator burning disposal by pipeline, is deposited in after the light component cooling in the first trap 8
Tank bottom is collected.Steam heavy constituent in first rectifying column 2, its steam not and rise to tower top section and are condensed, and are passed through after being condensed
First bottom of towe return duct 6 is flowed into the first distillation still 1, and through constantly evaporation, heavy constituent is managed after becoming tarry by heavy constituent extraction
Discharge, becomes black slag after cooling.Extract effect of the crude product in after-fractionating kettle 11 and Second distillation column 12 of the extraction of pipe 7 out through crude product
Under, the method for operation is identical with first rectifying column 2, and extracting pipe 17 out eventually through finished product obtains the trimellitic anhydride finished product of high-purity.
The present apparatus utilizes two sets of rectifying column parallel forms, can reduce the height of rectifying column, so as to reduce steam in rectifying column
Running resistance, meanwhile, also by the change of filling-material structure, make operation of the steam in filler more smoothly.Substantially reduce
The energy consumption of equipment, meanwhile, the time of rectifying is also shortened, improves production efficiency.The trimellitic anhydride that the present apparatus obtains it is pure
For degree up to more than 97.5%, the content of the phthalic anhydride containing light component substantially increases inclined benzene within 100ppm
The purity of three acid anhydrides, meet the high request of European Union environmental protection standard；During save 30% calorific value consumption；Together
When, due to the reduction of equipment power dissipation, enhance the operation stability of equipment so that equipment operation maintenance maintenance dynamics drops significantly
It is low.The device cannot be only used for the production of trimellitic anhydride, it may also be used for other acid anhydrides, esters such as trioctyl trimellitate (TOTM), neighbour
In the industrial production of phthalic acid dioctyl ester.
Embodiment 2：As shown in Fig. 1, Fig. 3, Fig. 4, a kind of trimellitic anhydride rectifier unit, including first rectifying column 2 and
Two rectifying columns 12, filler 9 are provided with the first rectifying column 2 and Second distillation column 12, filler 9 includes the ceramic He of corrugated plate 91
Ceramic flat plate 92, the section waveform of the ceramic corrugated plate 91 are sine and cosine wave structure, the wavelength of sine and cosine ripple for 1.5~
2mm.Two ceramic corrugated plates 91, and the ripple rib of two ceramic corrugated plates 91 are provided between the adjacent two ceramic flat plate 92
Shape incline direction is opposite.Other are the same as embodiment 1.
The utility model is not limited to above-described embodiment, on the basis of technical scheme disclosed in the utility model, this
The technical staff in field is according to disclosed technology contents, it is not necessary to which performing creative labour can is special to some of which technology
Sign makes some and replaces and deform, and these are replaced and deformed in the scope of protection of the utility model.
Claims (6)
1. a kind of trimellitic anhydride rectifier unit, including the first distillation still (1), first rectifying column (2), the first condenser (3), the
One vavuum pump (4), the first gas phase pipe (5) is provided between the top of first distillation still (1) and the bottom of first rectifying column (2)
With the first bottom of towe return duct (6), first condenser (3) is arranged on the top of first rectifying column (2) and and first rectifying column
(2) pipeline is connected, and crude product is provided with the first rectifying column (2) and extracts pipe (7) out；It is characterized in that：It is additionally provided with the second steaming
Evaporate kettle (11), Second distillation column (12), the second condenser (13) and the second vavuum pump (14), the crude product extracts pipe (7) and the out
Two distillation stills (11) are connected, and the second gas is provided between the top of the after-fractionating kettle (11) and the bottom of Second distillation column (12)
Mutually pipe (15) and the second bottom of towe return duct (16)；Second condenser (13) is described with being connected at the top of Second distillation column (12)
Finished product is provided with Second distillation column (12) and extracts pipe (17) out；
Be additionally provided with the first trap (8) and the second trap (18), first trap (8) respectively with the first condenser
(3) top and the first vavuum pump (4) connection, second trap (18) respectively with the top of the second condenser (13) and the
Two vavuum pumps (14) connect.
2. trimellitic anhydride rectifier unit as claimed in claim 1, it is characterised in that：The height of the first rectifying column (2)
For 5.5~6m, the height of the Second distillation column (12) is 9~10m.
3. trimellitic anhydride rectifier unit as claimed in claim 1, it is characterised in that：The first rectifying column (2) and second
Filler (9) is provided with rectifying column (12), filler (9) includes ceramic corrugated plate (91) and ceramic flat plate (92), the ceramics
The section waveform of corrugated plate (91) is sine and cosine wave structure, and the wavelength of sine and cosine ripple is 1.5~2mm.
4. trimellitic anhydride rectifier unit as claimed in claim 3, it is characterised in that：The ceramic corrugated plate (91) and ceramics
Flat plate (92) is alternately stacked, and the ripple prismatic incline direction of two neighboring ceramic corrugated plate (91) is opposite.
5. trimellitic anhydride rectifier unit as claimed in claim 3, it is characterised in that：The adjacent two ceramic flat plate (92)
Between be provided with two ceramic corrugated plates (91), and the ripple prismatic incline direction of two ceramic corrugated plates (91) is opposite.
6. the trimellitic anhydride rectifier unit as described in claim 1 to 5 any one, it is characterised in that：First vacuum
Pump (4) and the second vavuum pump (14) are Roots vacuum system, in Roots vacuum system and the first trap (8) and the second trap
(18) it is provided with regulating valve (10) on the pipeline of connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720483394.XU CN206705998U (en) | 2017-05-03 | 2017-05-03 | A kind of trimellitic anhydride rectifier unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720483394.XU CN206705998U (en) | 2017-05-03 | 2017-05-03 | A kind of trimellitic anhydride rectifier unit |
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| CN206705998U true CN206705998U (en) | 2017-12-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441251A (en) * | 2018-03-28 | 2018-08-24 | 商丘中清环保科技有限公司 | Cryogenic distillation process |
| CN108441252A (en) * | 2018-03-28 | 2018-08-24 | 商丘中清环保科技有限公司 | Cryogenic distillation apparatus |
| CN109055768A (en) * | 2018-02-24 | 2018-12-21 | 虔东稀土集团股份有限公司 | A method of it preparing the vacuum drying oven of High purity samarium metal and its prepares High purity samarium metal |
| CN110448932A (en) * | 2019-09-04 | 2019-11-15 | 江苏正丹化学工业股份有限公司 | A kind of trimellitic acid continuous crystallisation is centrifuged into acid anhydride equipment |
-
2017
- 2017-05-03 CN CN201720483394.XU patent/CN206705998U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055768A (en) * | 2018-02-24 | 2018-12-21 | 虔东稀土集团股份有限公司 | A method of it preparing the vacuum drying oven of High purity samarium metal and its prepares High purity samarium metal |
| CN108441251A (en) * | 2018-03-28 | 2018-08-24 | 商丘中清环保科技有限公司 | Cryogenic distillation process |
| CN108441252A (en) * | 2018-03-28 | 2018-08-24 | 商丘中清环保科技有限公司 | Cryogenic distillation apparatus |
| CN108441251B (en) * | 2018-03-28 | 2021-02-23 | 商丘中清环保科技有限公司 | Cryogenic distillation process |
| CN110448932A (en) * | 2019-09-04 | 2019-11-15 | 江苏正丹化学工业股份有限公司 | A kind of trimellitic acid continuous crystallisation is centrifuged into acid anhydride equipment |
| CN110448932B (en) * | 2019-09-04 | 2024-05-28 | 江苏正丹化学工业股份有限公司 | Trimellitic acid continuous crystallization centrifugation becomes anhydride equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A rectification device for trimellitic anhydride Effective date of registration: 20200922 Granted publication date: 20171205 Pledgee: Bank of China Limited Huangshan Branch Pledgor: ANHUI TAIDA NEW MATERIALS Co.,Ltd. Registration number: Y2020980006322 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210809 Granted publication date: 20171205 Pledgee: Bank of China Limited Huangshan Branch Pledgor: ANHUI TAIDA NEW MATERIALS Co.,Ltd. Registration number: Y2020980006322 |