CN206127173U - Washing device of thick adipic acid thick liquids in adipic acid production process - Google Patents
Washing device of thick adipic acid thick liquids in adipic acid production process Download PDFInfo
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- CN206127173U CN206127173U CN201621085318.5U CN201621085318U CN206127173U CN 206127173 U CN206127173 U CN 206127173U CN 201621085318 U CN201621085318 U CN 201621085318U CN 206127173 U CN206127173 U CN 206127173U
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- adipic acid
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Abstract
The utility model relates to an apparatus for producing of adipic acid provides a washing device of thick adipic acid thick liquids in adipic acid production process, include: thick adipic acid thickener, the thick sour centrifuge who is linked together with thick adipic acid thickener, the blender that is connected with thick sour centrifuge's wet adipic acid, the washing wintercherry that is connected with blender material jar is with the industry adipic acid thickener that washing wintercherry material jar is connected, the industry adipic acid centrifuge who is connected with industry adipic acid thickener. The utility model discloses greatly reduced in the adipic acid content of nitrate, be sent to the adipic acid of subsequent refined process, the content of nitrate has reduced more than 50% than original technique, provides the assurance for the quality that further promotes smart adipic acid product. The adipic acid raw materials of low nitrate content is provided for TPU and nylon spinning trade. The utility model discloses still optimized original fresh water (FW) system, make full use of the fresh water (FW), reduced the emission, realized green production.
Description
Technical field
The utility model is related to a kind of process units of adipic acid, and in particular to the wash mill of thick adipic acid slurry.
Background technology
Important industrial chemicals during adipic acid, calls adipic acid, belongs to aliphatic dibasic acid.Adipic acid has binary aliphatic
The general character of acid, including esterification, aminating reaction, salt-forming reaction.At present polyurethane and nylon salt row are mainly used at home
Industry field, and developing rapidly due to polyurethane industries among others, account for the 65%～70% of domestic adipic acid aggregate consumption, and nylon salt is accounted for
20%～25%, the other field such as plasticizer accounts for 8%～10%.Domestic emerging thermoplastic polyurethane product (TPU) and nylon66 fiber
Fast development so that smart adipic acid product quality, the especially content of nitrate have higher requirement.
The smart adipic acid of traditional Production Processes of Adipic Acid production, product specification is to meet and is in SH/T1499.1-2012
《Smart adipic acid Part I：Specification》In specify accordingly.But domestic different industries medium and high level market is to smart adipic acid poor quality
The requirement of alienation, to product quality, on request grade is followed successively by different industries:Industrial yarn, civilian silk ＞ TPU ＞ PU slurry ＞ footwear
Prime cement material.
Nitrate and false nitric acid content are higher, and end breakage rate is raised when can cause nylon salt polymer spinning, and certain
In content the increase of nitrate anion cause adipic acid melting colourity significantly increase, will occur in TPU production processes viscosity decline,
The problems such as yellowish, therefore it is particularly important to control the nitrate content meaning of smart adipic acid.
Traditional production method, the acid solution after oxidation reaction evaporates in thick acid crystal device adiabatic cooling, then thick acid
Slurry carries out separation of solid and liquid after thick acid-thickened and centrifugation, obtains technique grade adipic acid, then carries out entering essence after dissolving decolouring
Acid crystal device, the slurry after crystallization send fluidized drying system to be dried after thickening centrifugation, obtains product essence adipic acid.
And the defect existing for traditional method is：Nitrate and false nitric acid content are higher, and 1.5～3mg/kg of nitric acid content can cause
During nylon salt polymer spinning end breakage rate raise, will occur in TPU production processes viscosity decline, yellowish the problems such as.
Therefore the needs of spinning grade nylon 66 and thermoplastic polyurethane can not be met.
Utility model content
It is an object of the invention to provide a kind of wash mill of the thick adipic acid slurry in adipic acid production process, to overcome
The drawbacks described above that prior art is present, meets the needs of association area development.
Device of the present utility model, including：
Thick adipic acid thickener；
Outlet with described thick adipic acid thickener by pipeline be connected be provided with former technique water inlet it is thick acid from
Scheming；
Export with the wet adipic acid of described thick acid centrifuging machine and be provided with the mixed of new technology water inlet by what pipeline was connected
Clutch；
The washing acid for being provided with washing process water inlet being connected by pipeline with the mixture outlet of described blender
Slurry tank；
Backwash process water out is provided with the slurry outlet of described washing acid slurry tank by what mashing pump was connected
Industrial adipic acid thickener；
The industry for being provided with desalination water inlet being connected with the outlet of the thickening thing of described industrial adipic acid thickener oneself two
Acid centrifuging machine；
The utility model brings following beneficial effect due to taking above technical scheme：
The utility model greatly reduces the content of nitrate in adipic acid, provides more clean for decolouring and Crystallization Procedure
Raw material, in being sent to the adipic acid of follow-up refining step, the content of nitrate reduces more than 50% than original technology, and oneself two
Acid melting colourity is substantially big, and the quality further to lift smart adipic acid product provides guarantee.For TPU and nylon shioze wire rows industry
There is provided the adipic acid raw material of protonitrate content.The utility model also optimizes original technique water system, takes full advantage of work
Skill water, reduces discharge, realizes environmental protection production.
Description of the drawings
Fig. 1 is the wash mill schematic diagram of the thick adipic acid slurry in adipic acid production process.
Specific embodiment
Referring to Fig. 1, device of the present utility model, including：
Thick adipic acid thickener 1；
Outlet 101 with described thick adipic acid thickener 1 is provided with former technique water inlet 202 by what pipeline was connected
Thick acid centrifuging machine 2；
New technology water inlet is provided with the wet adipic acid outlet 201 of described thick acid centrifuging machine 2 by what pipeline was connected
701 blender 7；
Washing process water inlet 501 is provided with the mixture outlet 702 of described blender 7 by what pipeline was connected
Washing acid slurry tank 5；
Gone out by the backwash process water that is provided with that mashing pump is connected with the slurry outlet 502 of described washing acid slurry tank 5
The industrial adipic acid thickener 8 of mouth 802；
The industry for being provided with desalination water inlet 601 being connected with the thickening thing outlet of described industrial adipic acid thickener 8
Adipic acid centrifuge 6；
Described industrial adipic acid centrifuge 6 is the centrifuge that can continuously rinse internal filtering in rotating drum cake, is that this area leads to
Equipment, such as company of the Switzerland Fu Laimu Co., Ltds trade mark are the centrifuge of P-100, and this centrifuge can continuously be rinsed and turned
Filter cake in drum；
Preferably, described washing acid slurry tank 5 is provided with agitator；
Preferably, also including mother liquor acid tank 10, the mother liquor acid outlet 102 of described thick adipic acid thickener 1 passes through pipeline
It is connected with mother liquor acid tank 10, the washing water out 203 of described thick acid centrifuging machine 2 is connected by pipeline with mother liquor acid tank 10
Connect；
Preferably, also including former technique water pot 3, described industrial adipic acid thickener 8 and described former technique water pot 3
Technique water inlet 301 is connected by pipeline, the former technique water out 302 of described former technique water pot 3 by pipeline with it is thick
The former technique water inlet 202 of acid centrifuging machine 2 is connected；
Preferably, the washing process water out 602 of described industrial adipic acid centrifuge 6 is by pipeline and washing acid slurry
The washing process water inlet 501 of tank 5 is connected；
Using said apparatus, the method that the thick adipic acid slurry from thick acid crystal operation is washed, including it is as follows
Step：
(1) thick adipic acid thickener 1 from the thick adipic acid slurry of thick acid crystal operation, will be sent into, separation contains binary
Acid and the mother liquor acid of nitric acid, obtain the adipic acid slurry that weight solid content is 35～45% thickenings, and the mother liquor acid separated is sent
Enter mother liquor acid tank 10；
In described thick adipic acid slurry, the component containing following percentage by weight：
Adipic acid 30～40%, nitrate surplus 13～18%, diacid content 4～8%, water 30～35%.
The structure of described thick adipic acid thickener 1 is conventional, be can be found in《Candle filter is in the thick thickener of adipic acid
On type selecting with application》Oil and chemical industry equipment 2011；
(2) and then by the adipic acid slurry of the thickening for obtaining, thick acid centrifuging machine 2 is sent into, with from the former work of former technique water pot 3
Skill water is with 6m3/ h～14m3/ h flows are washed, and solid-liquor separation, obtain wet adipic acid；
The adipic acid slurry of thickening is with the weight ratio of former fresh water (FW)：
The adipic acid slurry of thickening：Former fresh water (FW)=1：0.8-1.2；
The washings that thick acid centrifuging machine 2 is discharged enter mother liquor acid tank 10, for reclaiming the catalyst in mother liquor acid, discharge two
First acid；
(3) wet adipic acid and the new technology water from new technology water pot 4 are mixed into humidification in described blender 7, weight
Amount solid-to-liquid ratio is 1:2.5～3, subsequently into washing acid slurry tank 5, with the washing process water from industrial adipic acid centrifuge 6
Mixing, it is 1.5～1.8 to control weight solid-to-liquid ratio, and stirring, dispersion, mixing, speed of agitator is 50rpm～65rpm；
(4) by the material slurry pumping of washing acid slurry tank 5 to industrial adipic acid thickener 8, described industry oneself two
Acid-thickened device 8 claps SECO using three groups of filters, carries out extraction backwash, and fresh water (FW) delivers to former cold technique water pot 3；
(5) material after thickening delivers to industrial adipic acid centrifuge 6, with solid-liquor separation after desalination water washing, obtain it is thick oneself
Diacid, is sent to follow-up refining step；
The flow of desalted water is 6～10m3/ h, 0.8～1.2, filter cake is controlled in 4cm～6cm, pusher for wash ratio control
Speed is 1200～1500r.p.m, and charging rate is 8-12m3/h；
Using the method, it is ensured that very high detersive efficiency, because of the persistent movement of filter cake, can avoid being produced on filter cake and split
Seam, fresh water (FW) is back to washing acid slurry tank 5；
Term " former fresh water (FW) " refers to the water circulated in technical process；Term " new technology water " refers to supplementary technique
Water；Term " wash ratio " refers to the ratio of adipic acid slurry and washings；Term " pusher speed " refers to adipic acid slurry
In the speed of three-level rotary drum turnover.
Claims (5)
1. the wash mill of the thick adipic acid slurry in adipic acid production process, it is characterised in that include：
Thick adipic acid thickener (1)；
Outlet (101) with described thick adipic acid thickener is provided with former technique water inlet (202) by what pipeline was connected
Thick acid centrifuging machine (2)；
New technology water inlet is provided with wet adipic acid outlet (201) of described thick acid centrifuging machine (2) by what pipeline was connected
(701) blender (7)；
Washing process water inlet (501) is provided with the mixture outlet (702) of described blender by what pipeline was connected
Washing acid slurry tank (5)；
Gone out by the backwash process water that is provided with that mashing pump is connected with the slurry outlet (502) of described washing acid slurry tank (5)
The industrial adipic acid thickener (8) of mouth (802)；
The industry for being provided with desalination water inlet (601) being connected with the outlet of the thickening thing of described industrial adipic acid thickener oneself two
Acid centrifuging machine (6).
2. the wash mill of the thick adipic acid slurry in adipic acid production process according to claim 1, it is characterised in that
Described washing acid slurry tank is provided with agitator.
3. the wash mill of the thick adipic acid slurry in adipic acid production process according to claim 1, it is characterised in that
Also include mother liquor acid tank, mother liquor acid outlet (102) of described thick adipic acid thickener is connected by pipeline with mother liquor acid tank,
The washing water out (203) of described thick acid centrifuging machine is connected by pipeline with mother liquor acid tank.
4. the wash mill of the thick adipic acid slurry in adipic acid production process according to claim 1, it is characterised in that
Also include former technique water pot (3), the technique water inlet of described industrial adipic acid thickener (8) and described former technique water pot
(301) it is connected by pipeline, the former technique water out (302) of described former technique water pot is by pipeline and thick acid centrifuging machine
Former technique water inlet (202) is connected.
5. the wash mill of the thick adipic acid slurry in adipic acid production process according to claim 1, it is characterised in that
The washing that the washing process water out (602) of described industrial adipic acid centrifuge (6) passes through pipeline and washing acid slurry tank (5)
Technique water inlet (501) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621085318.5U CN206127173U (en) | 2016-09-27 | 2016-09-27 | Washing device of thick adipic acid thick liquids in adipic acid production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621085318.5U CN206127173U (en) | 2016-09-27 | 2016-09-27 | Washing device of thick adipic acid thick liquids in adipic acid production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206127173U true CN206127173U (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621085318.5U Active CN206127173U (en) | 2016-09-27 | 2016-09-27 | Washing device of thick adipic acid thick liquids in adipic acid production process |
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| CN (1) | CN206127173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112457186A (en) * | 2020-11-25 | 2021-03-09 | 重庆华峰化工有限公司 | Device and method for separating and recovering dibasic acid and catalyst in adipic acid production |
-
2016
- 2016-09-27 CN CN201621085318.5U patent/CN206127173U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112457186A (en) * | 2020-11-25 | 2021-03-09 | 重庆华峰化工有限公司 | Device and method for separating and recovering dibasic acid and catalyst in adipic acid production |
| CN112457186B (en) * | 2020-11-25 | 2021-09-14 | 重庆华峰化工有限公司 | Device and method for separating and recovering dibasic acid and catalyst in adipic acid production |
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