CN107823897A - Method for recovering solvents - Google Patents
Method for recovering solvents Download PDFInfo
- Publication number
- CN107823897A CN107823897A CN201711040708.XA CN201711040708A CN107823897A CN 107823897 A CN107823897 A CN 107823897A CN 201711040708 A CN201711040708 A CN 201711040708A CN 107823897 A CN107823897 A CN 107823897A
- Authority
- CN
- China
- Prior art keywords
- exhaust column
- solvent
- dust
- recovery
- recovery tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
- B01D5/0009—Horizontal tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/263—Drying gases or vapours by absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to the recovery technology such as steam, waste gas field, and in particular to a kind of method for recovering solvents, comprises the following steps：A, mixed material is put into retort, heats mixed material, make solvent by thermosetting steam；B, the obtained steam of step A is passed through dust removing units；C, the obtained steam of step B is passed through recovery unit；Recovery unit includes condenser pipe and the recovery tube connected with exhaust column, and recovery tube is provided with check valve, the liquid outlet for connecting receiving flask and the converting interface for connecting vacuum plant, condenser pipe and is located on the outer wall of recovery tube；Check valve is opened, starts condenser pipe, the solvent of liquid is collected from liquid outlet；D, close a check valve within every 5~10 days, start motor and dust absorption fan, dedusting is carried out to exhaust column.It effectively can prevent dust from mixing in solvent using the technical program, and dedusting can be carried out to exhaust column, so as to improve the recovery quality of solvent.
Description
Technical field
The present invention relates to the recovery technology such as steam, waste gas field, and in particular to a kind of method for recovering solvents.
Background technology
In organic chemistry filed, all kinds of solutes of HMW often are dissolved with the organic solvent of low molecule amount to carry out
Prepare, pre-treatment or the post-processing step such as purification, and after preceding processing or post processing, often need solvent from solute
In remove and reclaimed, prevent solvent volatilization from influenceing environment etc..Because most solvent is all that low molecular weight organic closes
Thing, therefore there is preferable volatile performance, therefore at present during recycling design, often cause by way of heating
Substantial amounts of solvent forms steam and volatilized, so as to which it be separated with solute, and recycling design.
Such as during single-base powder is prepared as raw material using nitrocotton, in order to separate and reclaimed solvent,
Prior art is usually to heat mixed material, and is extracted out solvent vapo(u)r using exhaust column, but total before and after single-base powder shaping
There is partial digested cotton dust to enter in exhaust column；Particularly when small size medicine is made, because air quantity is big, or equipment lacks pipe
Reason, can all aspirate part powder into exhaust column.These adsorbing powder dusts are in exhausting inside pipe wall, year in year out, easily block and take out
Airduct；And during negative pressure recycling design is formed by exhausting, it is also easy to mix in solvent, influences the recovery matter of solvent
Amount.
The content of the invention
It is an object of the invention to provide a kind of method for recovering solvents, effectively can prevent dust from mixing in solvent, and can be right
Exhaust column carries out dedusting, so as to improve the recovery quality of solvent.
To reach above-mentioned purpose, base case of the invention is as follows：Method for recovering solvents, comprise the following steps：
A, mixed material is put into retort, heats mixed material, make solvent by thermosetting steam；
B, the obtained steam of step A is passed through dust removing units；Dust removing units include dust absorption fan, exhaust column, motor, rotating shaft
And gear；Exhaust column one end connects with retort, and the exhaust column other end connects with dust absorption fan；The output shaft of motor connects with rotating shaft
Connect, rotating shaft side is provided with the hairbrush for brush exhausting inside pipe wall, and rotating shaft opposite side is provided with supporting plate, and supporting plate connects with pinion rotation
Connect；Exhausting inside pipe wall is provided with the ring gear engaged with gear, and gear is provided with the roller bearing for being used for cleaning exhausting inside pipe wall；Exhausting
Pipe is removably connected with dust suction piece close to one end of retort；
C, the obtained steam of step B is passed through recovery unit；Recovery unit includes condenser pipe and what is connected with exhaust column returns
Closed tube, recovery tube are provided with check valve, the liquid outlet for connecting receiving flask and the converting interface for connecting vacuum plant, condenser pipe and are located at back
On the outer wall of closed tube；Check valve is opened, starts condenser pipe, the solvent of liquid is collected from liquid outlet；
D, close a check valve within every 5~10 days, start motor and dust absorption fan, dedusting is carried out to exhaust column.
The operation principle of dust removing units is in above-mentioned technical proposal：
The output shaft of motor drives axis of rotation so that the hairbrush brush exhausting inside pipe wall being connected with rotating shaft, so that exhausting
Dust on inside pipe wall departs from exhausting inside pipe wall；Meanwhile axis of rotation drives supporting plate to rotate, band moving gear surrounds supporting plate again
Rotated centered on rotating shaft on the ring gear of exhausting inside pipe wall, the roller bearing on such gear is to the exhausting after hairbrush brush
Inside pipe wall carries out secondary cleaning；The dust to be come off from exhausting inside pipe wall is discharged exhausting under the sucking action of dust absorption fan
Pipe；Then motor and dust absorption fan are turned off, that is, reaches the effect to exhaust column dedusting.
The beneficial effect of above-mentioned technical proposal is：
1st, compared with it can not carry out the method for recovering solvents of dedusting to exhaust column in the prior art, the technical program passes through hair
The first cleaning of brush, allow the dust of exhausting inside pipe wall can be easily just de- under the effect of the frictional force of hairbrush and exhausting inside pipe wall
Fall, so as to first removing most dust on exhausting inside pipe wall, at the same time, due to the negative pressure that dust absorption fan provides, after coming off
Dust can soon be sucked out, so as to reach the purpose of rough dusting.
2nd, simultaneously, rotating shaft allow supporting plate rotate during so that gear can be carried out on the ring gear of exhausting inside pipe wall
Circumferential rotation, i.e. gear is not only revolved round the sun centered on rotating shaft, but also can carry out rotation, and so drive roller bearing also can be
Rotation and revolution are carried out on exhausting inside pipe wall, the purpose of secondary cleaning, and roller bearing and exhausting are not only reached to exhausting inside pipe wall
Rolling friction is produced between inside pipe wall, to the secondary cleaning effect of exhausting inside pipe wall more preferably.
3rd, the technical program is when recycling design, using being recovered under reduced pressure so that solvent is under conditions of low pressure
Evaporation, and gaseous solvent is condensed into by liquid by condenser pipe, so as to collect solvent；It can not only allow the heating-up temperature of heater
Even if being volatilized without too high solvent, security incident caused by high temperature etc. is avoided, and the solvent temperature of steam condition will not be too high,
When being condensed on recovery tube, it is easier to liquid is condensed into, it is higher to the rate of recovery of solvent.
4th, the solvent vapo(u)r in the technical program first passes through exhaust column and entered back into recovery tube by reclaiming on tube wall
Condenser pipe is condensed, and more preferably, solvent recovering rate is higher for condensation effect.
5th, the hairbrush in the technical program can also play a certain degree of suction-operated to dust, be more conducive to allow dust to protect
Stay in exhaust column, solvent recovery quality is more preferably.
6th, the dust absorbing that the dust suction piece in the technical program will preliminarily can be run out of from retort, dust removing effects are more
Good, solvent recovery quality is more preferably.
Preferred scheme one, based on scheme preferred scheme, recovery tube is vertically located at one of exhaust column away from retort
End.Vertical design is it is possible to prevente effectively from dust enters recovery tube, and make it that dust is retained in exhaust column as far as possible, is reclaimed
The solvent purity arrived is more preferable.
Preferred scheme two, based on scheme preferred scheme, is provided with the suction vertical with solvent water conservancy diversion direction in recovery tube
Water layer.The moisture absorption that water accepting layer will can be mingled with solvent, solvent quality is more preferable, and water accepting layer and solvent water conservancy diversion direction are hung down
Directly, water removal effect is more preferable.
Preferred scheme three, based on scheme, preferred scheme one or preferred scheme two preferred scheme, it is right in step D
The time of exhaust column dedusting is 30s~85s.Not only good dedusting effect, and efficiency of dust collection is high.
The preferred scheme of preferred scheme four, preferably three, condenser pipe are coiled pipe.The contact surface of coiled pipe and recovery tube
Product is bigger, and condensation effect is more preferably.
Brief description of the drawings
Fig. 1 is the structural representation of dust removing units and recovery unit in method for recovering solvents of the present invention.
Embodiment
Below by the further details of explanation of embodiment：
Reference in Figure of description includes：Retort 1, electric heating cover 10, dust absorption fan 2, exhaust column 3, dust suction
It is piece 30, ring gear 31, motor 4, rotating shaft 40, hairbrush 41, supporting plate 42, gear 5, roller bearing 50, condenser pipe 6, recovery tube 60, unidirectional
Valve 61, water accepting layer 62, liquid outlet 63, converting interface 64.
Embodiment 1
Embodiment 1 substantially as shown in Figure 1, method for recovering solvents, comprises the following steps：
A, mixed material is put into retort 1, heats mixed material, make solvent by thermosetting steam；Retort 1 includes tank
Body and cover the cover at the top of tank body；The preferred electric heating cover 10 of device of mixed material is heated, the tank body of retort 1 is embedded
In heater；Temperature can easily be controlled using electric heating cover 10, so that this equipment can be easily applied to not
It is simple to operate with the solvent recovery of boiling point；
B, the obtained steam of step A is passed through dust removing units；Dust removing units include dust absorption fan 2, exhaust column 3, motor 4,
Rotating shaft 40 and gear 5；The bottom of exhaust column 3 connects through the cover of retort 1 with the tank body of retort 1, the top of exhaust column 3
Connected with dust absorption fan 2.The bottom of exhaust column 3 is also removably connected with dust suction piece 30, and connected mode is preferably with rope by dust suction
Piece 30 is connected to the dust suction cloth of the mode on exhaust column 3, preferably cotton, and the cloth of this material easily produces electrostatic, dust suction effect
Fruit is good, and cost is relatively low；
The output shaft of motor 4 is connected with rotating shaft 40, and the side of rotating shaft 40 is provided with some vertically disposed in brush exhaust column 3
The hairbrush 41 of wall, the opposite side of rotating shaft 40 are provided with supporting plate 42, and supporting plate 42 is rotatablely connected with gear 5, preferably pivotally connected；Exhausting
The inwall at the top of pipe 3 is provided with the ring gear 31 engaged with gear 5, and gear 5 is provided with the roller bearing for being used for cleaning the inwall of exhaust column 3
50, the surface toughness material of roller bearing 50, preferably double faced adhesive tape, and roller bearing 50 is interference fitted in the endoporus of gear 5, convenient dismounting is more
Change；
C, the obtained steam of step B is passed through recovery unit；Recovery unit includes condenser pipe 6 and connected with exhaust column 3
Recovery tube 60, recovery tube 60 are vertically located at the one end of exhaust column 3 away from retort 1, recovery tube 60 be provided with check valve 61, with it is molten
The vertical water accepting layer 62 in agent water conservancy diversion direction, for collect the liquid outlet 63 of liquid solvent with for connecting vacuum plant (such as：Vacuum
Pump) converting interface 64, water accepting layer 62 preferably includes the cloth bag of the inorganic drying agents such as calcium sulfate, copper sulphate, and condenser pipe 6 is located at recovery
On the outer wall of pipe 60,6 preferred coiled pipe of condenser pipe；
D, close a check valve 61 within every 5 days, start motor 4 and dust absorption fan 2, dedusting is carried out to exhaust column 3, dedusting
Time is 30s.
When recycling design, the processing procedure of solvent is the present embodiment：Solvent heating evaporation under conditions of low pressure；
When exhaust column 3 are entered, the part dust in solvent can be attracted on dust suction piece 30；The hair passed through again in recovery tube 60
Brush 41, can also reach a certain degree of absorption, while the temperature of solvent vapo(u)r is gradually reduced to the dust in solvent；After cooling
Solvent enters recovery tube 60, is removed water by water accepting layer 62, and gaseous solvent is condensed into liquid by condenser pipe 6, then
Liquid solvent is collected from liquid outlet 63, when liquid outlet 63 flows out without solvent, closes heater, question response tank 1 is cold
But to after normal temperature, vacuum plant is disassembled, that is, reaches the purpose of recycling design.
When dedusting, the course of work of dedusting is the present embodiment：The output shaft of motor 4 drives rotating shaft 40 to rotate, and makes
The inwall of 41 brush exhaust column of hairbrush 3 being connected with rotating shaft 40 is obtained, so that the dust on the inwall of exhaust column 3 departs from the inwall of exhaust column 3,
In this process, the dust adsorbed on hairbrush 41 can also depart from from hairbrush 41；Meanwhile rotating shaft 40 rotates and drives supporting plate 42
Rotating, supporting plate 42 is rotated on the ring gear 31 of the inwall of exhaust column 3 centered on surrounding rotating shaft 40 with moving gear 5 again, this
Roller bearing 50 on sample gear 5 carries out secondary cleaning to the inwall of exhaust column 3 after the brush of hairbrush 41；The dust to come off is in dust suction wind
Exhaust column 3 is discharged under the sucking action of machine 2；Then motor 4 and dust absorption fan 2 are turned off, that is, reaches and exhaust column 3 is removed
The effect of dirt.
Embodiment 2
The present embodiment and the difference of embodiment 1 are：Close a check valve 61 within every 8 days in step D, start the He of motor 4
Dust absorption fan 2, dedusting is carried out to exhaust column 3, the time of dedusting is 60s.
Embodiment 3
The present embodiment and the difference of embodiment 1 are：Close a check valve 61 within every 10 days in step D, start the He of motor 4
Dust absorption fan 2, dedusting is carried out to exhaust column 3, the time of dedusting is 85s.
Above-described is only embodiments of the invention, and the general knowledge such as known concrete structure and characteristic is not made herein in scheme
Excessive description., without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these should also be considered as protection scope of the present invention, and these are implemented all without the influence present invention
Effect and practical applicability.The scope of protection required by this application should be based on the content of the claims, in specification
The records such as embodiment can be used for the content for explaining claim.
Claims (5)
1. method for recovering solvents, it is characterised in that comprise the following steps：
A, mixed material is put into retort, heats mixed material, make solvent by thermosetting steam；
B, the obtained steam of step A is passed through dust removing units；The dust removing units include dust absorption fan, exhaust column, motor, rotating shaft
And gear；Described exhaust column one end connects with retort, and the exhaust column other end connects with dust absorption fan；The output shaft of the motor
It is connected with rotating shaft, the rotating shaft side is provided with the hairbrush for brush exhausting inside pipe wall, and rotating shaft opposite side is provided with supporting plate, the branch
Fagging is connected with the pinion rotation；The exhausting inside pipe wall is provided with the ring gear that is engaged with the gear, on the gear
Provided with the roller bearing for cleaning exhausting inside pipe wall；The exhaust column is removably connected with dust suction piece close to one end of retort；
C, the obtained steam of step B is passed through recovery unit；The recovery unit includes condenser pipe and connected with the exhaust column
Recovery tube, the recovery tube is provided with check valve, the liquid outlet for connecting receiving flask and the converting interface that connects vacuum plant, described
Condenser pipe is located on the outer wall of recovery tube；Check valve is opened, starts condenser pipe, the solvent of liquid is collected from liquid outlet；
D, close a check valve within every 5~10 days, start motor and dust absorption fan, dedusting is carried out to exhaust column.
2. method for recovering solvents according to claim 1, it is characterised in that：The recovery tube is vertically located at the exhaust column
One end away from retort.
3. method for recovering solvents according to claim 1, it is characterised in that：It is provided with and solvent water conservancy diversion side in the recovery tube
To vertical water accepting layer.
4. according to the method for recovering solvents described in any one of claims 1 to 3 claim, it is characterised in that：It is right in step D
The time of exhaust column dedusting is 30s~85s.
5. method for recovering solvents according to claim 4, it is characterised in that：The condenser pipe is coiled pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711040708.XA CN107823897A (en) | 2017-10-31 | 2017-10-31 | Method for recovering solvents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711040708.XA CN107823897A (en) | 2017-10-31 | 2017-10-31 | Method for recovering solvents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107823897A true CN107823897A (en) | 2018-03-23 |
Family
ID=61650128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711040708.XA Pending CN107823897A (en) | 2017-10-31 | 2017-10-31 | Method for recovering solvents |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107823897A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101156994A (en) * | 2006-08-31 | 2008-04-09 | 三洋电机株式会社 | Distillation apparatus |
| CN201046359Y (en) * | 2007-05-17 | 2008-04-16 | 上海富茵流体设备制造有限公司 | Automatic blowdown brush type filter |
| CN103083962A (en) * | 2013-02-21 | 2013-05-08 | 南通海鹰机电集团有限公司 | Self-sweeping filter |
-
2017
- 2017-10-31 CN CN201711040708.XA patent/CN107823897A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101156994A (en) * | 2006-08-31 | 2008-04-09 | 三洋电机株式会社 | Distillation apparatus |
| CN201046359Y (en) * | 2007-05-17 | 2008-04-16 | 上海富茵流体设备制造有限公司 | Automatic blowdown brush type filter |
| CN103083962A (en) * | 2013-02-21 | 2013-05-08 | 南通海鹰机电集团有限公司 | Self-sweeping filter |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180323 |
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| RJ01 | Rejection of invention patent application after publication |