CN207286714U - A kind of TVR evaporation concentration devices of NMMO ionic liquids - Google Patents
A kind of TVR evaporation concentration devices of NMMO ionic liquids Download PDFInfo
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- CN207286714U CN207286714U CN201720895329.8U CN201720895329U CN207286714U CN 207286714 U CN207286714 U CN 207286714U CN 201720895329 U CN201720895329 U CN 201720895329U CN 207286714 U CN207286714 U CN 207286714U
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Abstract
The utility model discloses a kind of TVR evaporation concentration devices of NMMO ionic liquids, including adverse current pre-heating system, following current vapo(u)rization system and heat pump compressibility, adverse current pre-heating system includes the secondary condenser, condensation water preheater, N effect preheaters being sequentially connected in series, until an effect preheater；Following current vapo(u)rization system includes 1st effective evaporator, the 2nd effect evaporator being sequentially connected in series, until N+1 effect evaporators；Material is introduced by secondary condenser, is sequentially entered condensation water preheater, N effects preheater, N 1 and is imitated preheater, until entering an effect preheater；Again by one effect preheater enter 1st effective evaporator, 2nd effect evaporator, until N+1 effect evaporator in, and N+1 effect evaporator discharge port obtain 85% concentrate；Complete the concentration of material.The present apparatus has NMMO preferable concentrated effect, and heat utilization ratio is high, and the NMMO solvent strengths after processing reach 85%, and steam-water ratio reaches 0.2.
Description
Technical field
The utility model belongs to evaporation of the solvent concentrate recovery process, and in particular to a kind of TVR evaporations of NMMO ionic liquids
Enrichment facility.
Background technology
Lyocell fiber is a kind new regenerated celulose fibre, is attracted widespread attention in recent years, it is with having
Solvent NMMO dissolves, and is prepared by dry-jet wet spinning process, its production process is polluted without waste water,waste gas and industrial residue, used molten
Agent is nontoxic to human body and environment and recyclable, and the rate of recovery reaches more than 99.5%.For NMMO solvents, it
Easily cure with low temperature, high temperature particularly temperature has the characteristics that labile when being higher than 95 DEG C, the boiling point of NMMO liter is with concentration
Rise and constantly increase, more than 60% boiling point rises and drastically raises, up to 52 DEG C during 85% concentration.Due to its physical property feature,
Corresponding advanced, suitable evaporation concentration technique is needed to its concentration and recovery.
It is dense that a kind of evaporation of cellulose solvent NMMO aqueous solutions is disclosed in Chinese patent literature CN201620194361.9
Compression apparatus, after traditional vaporising device and the processing of corresponding preheating device, when NMMO concentration of aqueous solution is 85%, its carbonated drink
Than reaching 0.225；But the device is only six traditional effect falling film evaporation devices, for the processing of NMMO aqueous solutions evaporation and concentration
Afterwards, steam-water ratio is still not ideal enough, it is still necessary to which device and technique are further improved to obtain more preferable treatment effect.And the present apparatus
Using new TVR evaporating and concentrating process, steam-water ratio is up to 0.2.
The content of the invention
Goal of the invention：The utility model aim is in view of the deficiencies of the prior art, there is provided a kind of high treating effect, can
Obtain the TVR evaporation concentration devices of the NMMO ionic liquids of relatively low steam-water ratio.
Technical solution：A kind of TVR evaporation concentration devices of NMMO ionic liquids, including adverse current pre-heating system, following current evaporation
System and heat pump compressibility, the secondary condenser, condensation water preheater, N effects that the adverse current pre-heating system includes being sequentially connected in series are pre-
Hot device, N-1 effect preheaters, until an effect preheater；The following current vapo(u)rization system includes 1st effective evaporator, two effects being sequentially connected in series
Evaporator, until N+1 effect evaporators, every 1st effective evaporator include the falling film evaporator and separator of appropriate level；Institute
Stating heat pump compressibility includes steam jet heat pump and respective line；
The discharge port of the one effect preheater and the feed inlet of 1st effective evaporator connect, the steam of the 1st effective evaporator into
Steam jet heat pump is connected at mouthful, is exported in the 1st effective evaporator through the separated indirect steam of separator by two branches, one
Indirect steam is imported steam jet heat pump by bar branch, and indirect steam is imported 2nd effect evaporator by another branch；
The preheater steam of the uncooled indirect steam introduction pipe of heating chamber and appropriate level enters in one~N effect evaporators
Mouth connection；One~N-1 imitates evaporator, and material after the separated indirect steam of separator, evaporation and concentration and condensed water importing is next
Imitate evaporator；The separated indirect steam of separator is introduced directly into main condenser, N~N+1 effect evaporators in N~N+1 effect evaporators
Middle condensed water is imported in condensation water preheater；
The outlet of the steam jet heat pump is divided into two branches, i.e., one effect steam branch and N+1 effect steam branches, described
The steam inlet of one effect steam branch and 1st effective evaporator connects, and N+1 effect steam branches and the steam inlet of N+1 effect evaporators connect
Connect, mixed vapour branch path is imported evaporation injection heat pump 1st effective evaporator and N+1 imitates evaporator；
The gaseous phase outlet of the main condenser and the gas phase entrance of secondary condenser connect, and the secondary condenser connects vacuum pump
Group, fixed gas is extracted out；
Material is introduced by secondary condenser, sequentially enters condensation water preheater, N effects preheater, N-1 effect preheaters, until into
Enter an effect preheater；1st effective evaporator, 2nd effect evaporator are entered, until in N+1 effect evaporators by an effect preheater again, and by N+
The discharge port of 1 effect evaporator obtains 85% concentrate；Complete the concentration of material；It is complete by circulating pump that every level-one of material turns material
Into；
The indirect steam that raw steam imports in steam jet heat pump with 1st effective evaporator forms mixed vapour, mixed vapour
By steam jet heat pump outlet into 1st effective evaporator and N+1 effect evaporators, the conveying of steam is completed.
Further, consumption, N=5 can be expected by being reduced while completion material preferably concentrates.
Further, to avoid steam superheating from producing harmful effect to material, the exit of the steam jet heat pump is set
There is spray desuperheating device, the water of the spray desuperheating device is imitated the condensed water in evaporator from N+1, filled by the spray desuperheating
Put and suitably cool down to the steam in pipeline, eliminate steam superheating.
Further, exported in the 2nd effect evaporator through the separated indirect steam of separator by two branches, a branch
Indirect steam is imported N+1 effect steam branches by road, eventually enters into N+1 effect evaporators；Indirect steam is imported three by another branch
Imitate evaporator.
Further, in the 1st effective evaporator N+1 effect steam branch is also introduced directly into through the separated indirect steam of separator
Road, eventually enters into N+1 effect evaporators.
Further, the condensation water preheater is board-like multithread pass heat exchanger；One~N imitates preheater and condenser is
Fixed tube-sheet exchanger；Include shell and tube falling film evaporator and tangent line cyclone separator per 1st effective evaporator.
Further, each steam branch for being connected into the N+1 effects steam branch is equipped with flow control valve, is born according to operation
Lotus adjusts the flow of each branch supply steam.
Further, the N+1 effects evaporator discharge port has discharging pump, and online refractive power is installed in the outlet of the discharging pump
Instrument, detects discharge concentration, discharges when concentrate concentration reaches 85%.
Beneficial effect：(1) present apparatus can rationally utilize steam, preferable concentrated effect be completed to NMMO, using steam
The indirect steam that one effect of jet heat pump compression evaporates, is mixed into 120 DEG C or so of steam, reduces the pressure and use of raw steam
Amount, equivalent to the energy-saving effect of increase 1st effective evaporator；(2) condensed water, fixed gas and the secondary steaming that pre- heat utilization device produces
Vapour, the heat of whole technique are fully utilized, and steam-water ratio reaches 0.2, lead over the 0.23 of world level；(3) after handling
NMMO solvent strengths reach 85%.
Brief description of the drawings
Fig. 1 is the overall flow schematic diagram in embodiment 1.
Embodiment
Technical solutions of the utility model are described in detail below by attached drawing, but the scope of protection of the utility model
It is not limited to the embodiment.
Embodiment 1：A kind of TVR evaporation concentration devices of NMMO ionic liquids, including adverse current pre-heating system, following current evaporation system
System and heat pump compressibility, the adverse current pre-heating system include the secondary condenser, condensation water preheater, six effect preheatings being sequentially connected in series
Device, five effect preheaters, quadruple effect preheater, triple effect preheater, two effect preheaters and an effect preheater；The following current vapo(u)rization system bag
Include the 1st effective evaporator being sequentially connected in series, 2nd effect evaporator, triple effect evaporator, four-effect evaporator, quintuple effect evaporator and sextuple-effect evaporation
Device, every 1st effective evaporator include the falling film evaporator and separator of appropriate level；The heat pump compressibility includes steaming
Vapour jet heat pump and respective line；
The discharge port of the one effect preheater and the feed inlet of 1st effective evaporator connect, the steam of the 1st effective evaporator into
Steam jet heat pump is connected at mouthful, is exported in the 1st effective evaporator through the separated indirect steam of separator by two branches, one
Indirect steam is imported steam jet heat pump by bar branch, and indirect steam is imported 2nd effect evaporator by another branch；
The preheater steam of the uncooled indirect steam introduction pipe of heating chamber and appropriate level in one~quintuple effect evaporator
Entrance connects；Under one~four-effect evaporator imports material after the separated indirect steam of separator, evaporation and concentration and condensed water
1st effective evaporator, fully discharges high-temperature condensation water thermal energy, thermal energy is utilized to greatest extent；Separator in five~sextuple effect
Separated indirect steam is introduced directly into main condenser, maintains the higher vacuum of system, end effect vacuum is up to 80mbar；Five~six
Condensed water in evaporator is imitated to import in condensation water preheater；
The outlet of steam jet heat pump is divided into two branches, i.e., one effect steam branch and six effect steam branches, an effect
The steam inlet of steam branch and 1st effective evaporator connects, and the steam inlet of six effect steam branches and sextuple effect connects, and steams
Send out jet heat pump and mixed vapour branch path is imported into 1st effective evaporator and sextuple effect；
Exported in 2nd effect evaporator through the separated indirect steam of separator by two branches, a branch leads indirect steam
Enter six effect steam branches, eventually enter into sextuple effect；Another indirect steam is imported triple effect evaporator by branch；One effect evaporation
Six effect steam branches are also introduced directly into through the separated indirect steam of separator in device, eventually enter into sextuple effect；It is connected into six effects
Each steam branch of steam branch is equipped with flow control valve, and the flow of each branch supply steam is adjusted according to working load；It is raw
The indirect steam that steam imports in steam jet heat pump with 1st effective evaporator forms mixed vapour, and mixed vapour is sprayed by steam
Heat pump is pumped into 1st effective evaporator and sextuple effect, completes the conveying of steam.
The gaseous phase outlet of main condenser and the gas phase entrance of secondary condenser connect, and the secondary condenser connects vacuum pump group,
Fixed gas is extracted out.
In the present apparatus, the exit of steam jet heat pump is equipped with spray desuperheating device, and the water of spray desuperheating device comes from six
The condensed water in evaporator is imitated, is suitably cooled down to the steam in pipeline by the spray desuperheating device, eliminates steam superheating.
Condensation water preheater is board-like multithread pass heat exchanger；One~five effect preheater and condenser change for fixed tube sheet type
Hot device；Include shell and tube falling film evaporator and tangent line cyclone separator per 1st effective evaporator；Sextuple effect discharge port has
Discharging pump, the outlet of discharging pump install online refractometer, detect discharge concentration, discharge when concentrate concentration reaches 85%.
30 DEG C, 15% NMMO solvents pass sequentially through secondary condenser, condensation water preheater, five effect preheaters, quadruple effect preheating
The preheating of device, triple effect preheater, two effect preheaters, an effect preheater enters 1st effective evaporator, and pre- hydrothermal solution adds in 1st effective evaporator
The top in hot cell is evenly distributed by cloth liquid disk, in membranaceous along tube wall to flowing down, at the same time heated and is steamed with heating chamber shell side
Vapour (being derived from steam jet heat pump) exchanges heat, and feed liquid is evaporated concentrate in the process, after being concentrated through 1st effective evaporator, portion
Sub-material liquid is transferred to 2nd effect evaporator concentration by an effect circulating pump, and the feed liquid after two effect concentrations, part feed liquid is followed by two effects
Ring pump is transferred to triple effect evaporator concentration, and so on, decline feed liquid is transferred to sextuple effect concentration by five effect circulating pumps,
Feed concentration after six effect concentrations reaches 85%, steam-water ratio of 85% concentrate through discharging pump discharge system, after testing device
Reach 0.2.
Whole concentration process temperature is not higher than 115 DEG C, 5 DEG C lower than Austrian import 6+1 effect evaporator temperatures, can be effective
The pyrolytic for avoiding NMMO ionic liquids；
In the TVR evaporation concentration devices of above-mentioned NMMO ionic liquids, the heating steam of six effect falling film evaporators can use
Heating steam is used as by the use of the indirect steam (100 DEG C) of 2nd effect evaporator, it is possible to provide 4-5 DEG C of effective heat transfer temperature difference, makes system
Obtain more economical steam-water ratio.The operational load of this vaporising device is 70-105%, each effect heat transfer temperature in underrun
Subtractive is few, and the indirect steam temperature of 2nd effect evaporator can be reduced to 95 DEG C or so, in order to improve system operatio elasticity, in underload
Using the mixed vapour (100 DEG C or so) that 1st effective evaporator or an effect and heat pump export as heating steam during operation, two
Pipeline is all mixed, and is realized and can be used simultaneously by control valve, or used respectively.
In the TVR evaporation concentration devices of above-mentioned NMMO ionic liquids, whens NMMO ionic liquid concentrations more than 50%, holds
Easily crystallization, therefore the 5th effect and the 6th effect Matter Transfer pump, valve, pipeline devise hot water jacket's insulation.
As described above, although the utility model has been represented and described with reference to specific preferred embodiment, but it must not
It is construed to the limitation to the utility model itself.The spirit and scope of the utility model that appended claims define are not being departed from
Under the premise of, can various changes can be made in the form and details to it.
Claims (8)
- A kind of 1. TVR evaporation concentration devices of NMMO ionic liquids, it is characterised in that：Evaporated including adverse current pre-heating system, following current System and heat pump compressibility, the secondary condenser, condensation water preheater, N effects that the adverse current pre-heating system includes being sequentially connected in series are pre- Hot device, N-1 effect preheaters, until an effect preheater；The following current vapo(u)rization system includes 1st effective evaporator, two effects being sequentially connected in series Evaporator, until N+1 effect evaporators, every 1st effective evaporator include the falling film evaporator and separator of appropriate level；Institute Stating heat pump compressibility includes steam jet heat pump and respective line；The discharge port of the one effect preheater and the feed inlet of 1st effective evaporator connect, at the steam inlet of the 1st effective evaporator Steam jet heat pump is connected, is exported in the 1st effective evaporator through the separated indirect steam of separator by two branches, a branch Indirect steam is imported steam jet heat pump by road, and indirect steam is imported 2nd effect evaporator by another branch；The preheater steam inlet of the uncooled indirect steam introduction pipe of heating chamber and appropriate level connects in one~N effect evaporators Connect；One~N-1 imitates evaporator and material after the separated indirect steam of separator, evaporation and concentration and condensed water is imported next effect steaming Send out device；The separated indirect steam of separator is introduced directly into main condenser in N~N+1 effect evaporators, and N~N+1 is imitated cold in evaporator Condensate is imported in condensation water preheater；The outlet of the steam jet heat pump is divided into two branches, i.e., one effect steam branch and N+1 effect steam branches, an effect The steam inlet of steam branch and 1st effective evaporator connects, and N+1 is imitated steam branch and is connected with the steam inlet of N+1 effect evaporators, Mixed vapour branch path is imported evaporation injection heat pump 1st effective evaporator and N+1 imitates evaporator；The gaseous phase outlet of the main condenser and the gas phase entrance of secondary condenser connect, and the secondary condenser connects vacuum pump group, Fixed gas is extracted out；Material is introduced by secondary condenser, condensation water preheater, N effects preheater, N-1 effect preheaters is sequentially entered, until entering one Imitate preheater；1st effective evaporator, 2nd effect evaporator are entered, until in N+1 effect evaporators by an effect preheater again, and imitated by N+1 The discharge port of evaporator obtains 85% concentrate；Complete the concentration of material；Every level-one of material turns material and is completed by circulating pump；The indirect steam that raw steam imports in steam jet heat pump with 1st effective evaporator forms mixed vapour, and mixed vapour is by steaming The conveying of steam is completed into 1st effective evaporator and N+1 effect evaporators in the outlet of vapour jet heat pump.
- 2. the TVR evaporation concentration devices of NMMO ionic liquids according to claim 1, it is characterised in that：N=5.
- 3. the TVR evaporation concentration devices of NMMO ionic liquids according to claim 1, it is characterised in that：The steam spray The exit for penetrating heat pump is equipped with spray desuperheating device, and the water of the spray desuperheating device imitates the condensed water in evaporator from N+1, Suitably cooled down to the steam in pipeline by the spray desuperheating device, eliminate steam superheating.
- 4. the TVR evaporation concentration devices of NMMO ionic liquids according to claim 1, it is characterised in that：Two effect is steamed Exported in hair device through the separated indirect steam of separator by two branches, indirect steam is imported N+1 effect steam branch by a branch Road, eventually enters into N+1 effect evaporators；Another indirect steam is imported triple effect evaporator by branch.
- 5. the TVR evaporation concentration devices of NMMO ionic liquids according to claim 1, it is characterised in that：One effect is steamed N+1 effect steam branches are also introduced directly into through the separated indirect steam of separator in hair device, eventually enter into N+1 effect evaporators.
- 6. the TVR evaporation concentration devices of NMMO ionic liquids according to claim 1, it is characterised in that：The condensed water Preheater is board-like multithread pass heat exchanger；It is fixed tube-sheet exchanger that one~N, which imitates preheater and condenser,；Each effect evaporation Device includes shell and tube falling film evaporator and tangent line cyclone separator.
- 7. the TVR evaporation concentration devices of the NMMO ionic liquids according to claim 1 or 5 or 6, it is characterised in that：It is connected into Each steam branch of the N+1 effects steam branch is equipped with flow control valve, and adjusting each branch according to working load supplies steam Flow.
- 8. the TVR evaporation concentration devices of NMMO ionic liquids according to claim 1, it is characterised in that：The N+1 effects are steamed Hair device discharge port has discharging pump, and the outlet of the discharging pump installs online refractometer, detects discharge concentration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720895329.8U CN207286714U (en) | 2017-07-21 | 2017-07-21 | A kind of TVR evaporation concentration devices of NMMO ionic liquids |
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| CN201720895329.8U CN207286714U (en) | 2017-07-21 | 2017-07-21 | A kind of TVR evaporation concentration devices of NMMO ionic liquids |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115245687A (en) * | 2022-06-30 | 2022-10-28 | 内蒙古敕勒川糖业有限责任公司 | Five-effect evaporation system for sugar production and use method |
| CN115245687B (en) * | 2022-06-30 | 2024-05-14 | 内蒙古敕勒川糖业有限责任公司 | Five-effect evaporation system for sugar production and use method |
-
2017
- 2017-07-21 CN CN201720895329.8U patent/CN207286714U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115245687A (en) * | 2022-06-30 | 2022-10-28 | 内蒙古敕勒川糖业有限责任公司 | Five-effect evaporation system for sugar production and use method |
| CN115245687B (en) * | 2022-06-30 | 2024-05-14 | 内蒙古敕勒川糖业有限责任公司 | Five-effect evaporation system for sugar production and use method |
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