CN208814924U - The equipment of the accurate processing of NMP recycling purification in a kind of production of lithium battery - Google Patents
The equipment of the accurate processing of NMP recycling purification in a kind of production of lithium battery Download PDFInfo
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- CN208814924U CN208814924U CN201821128130.3U CN201821128130U CN208814924U CN 208814924 U CN208814924 U CN 208814924U CN 201821128130 U CN201821128130 U CN 201821128130U CN 208814924 U CN208814924 U CN 208814924U
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The utility model provides the equipment of the accurate processing of NMP recycling purification in a kind of production of lithium battery, including absorption plant, buffer unit, three concatenated rectifier units and adsorbent equipment, absorption plant liquid outlet is connect with buffer unit entrance, buffer unit outlet is connect with the first dehydration rectifier unit feed inlet, first dehydration rectifier unit heavy constituent extraction mouth is connect with the second dehydration rectifier unit feed inlet, second dehydration rectifier unit heavy constituent extraction mouth is connect with NMP rectifier unit feed inlet, NMP rectifier unit tower top light component extraction mouth is connect with adsorbent equipment feed inlet, adsorbent is filled in adsorbent equipment, first dehydration rectifier unit tower top light component extraction mouth is connect with absorption plant inlet, second dehydration rectifier unit tower top light component extraction mouth is connect with buffer unit entrance.The device using three tower cascade connected and handled through adsorption tower precision, by lithium battery produce in NMP waste gas recovery purify can be directly used as electron level nmp solvent lithium battery produce in positive and negative pole material solvent.
Description
Technical field
The utility model belongs to lithium battery production technical field, mentions more particularly, to NMP recycling in a kind of production of lithium battery
The equipment of pure accurate processing.
Background technique
N-Methyl pyrrolidone, English name N-Methyl pyrrolidone, i.e. NMP are important industrial chemicals, are
Commonly used solvent in the polar solvent and Production Process of Lithium Battery that a kind of selectivity is strong and stability is good, it is raw in lithium battery
During production, use NMP when making lithium battery positive and negative pole material, production lithium battery diaphragm is solvent more, and in production process, with
The production of lithium battery positive and negative pole material, diaphragm, nmp solvent used constantly volatilize, can will volatilize in usual production process
NMP take away, and absorb processing then discharge, will cause the serious waste of NMP raw material, while will also result in the pollution of environment,
Therefore, it is necessary to which the NMP gas that will volatilize recycles and reuses, to improve the utilization rate of NMP, reduce environmental pollution, but due to
When preparing electrode material, a part weight heterocompound and metal ion, unhindered amina etc. can be taken out of with solvent volatilization, is recycled
NMP purity is very low, there is impurity such as absorbent, weight heterocompound, metal ion, unhindered aminas in absorbing liquid, obtains recycling
NMP can not be directly used as solvent recycling.
Summary of the invention
Problem to be solved in the utility model is to provide setting for the NMP recycling accurate processing of purification in a kind of production of lithium battery
It is standby, can the NMP gas that volatilized in lithium battery positive and negative pole material, diaphragm production process be recycled and be purified, obtain electronics
Grade NMP, can be directly used for the solvent in Production Process of Lithium Battery.
In order to solve the above technical problems, the technical solution adopted in the utility model is:
The equipment of the accurate processing of NMP recycling purification in a kind of production of lithium battery, including absorption plant, buffer unit, first
It is dehydrated rectifier unit, the second dehydration rectifier unit, NMP rectifier unit and adsorbent equipment, the inlet and absorbent of absorption plant
Feedway connection, the liquid outlet of absorption plant and the entrance of buffer unit connect, the outlet of buffer unit and the first dehydration essence
The feed inlet of distillation unit connects, the charging of the tower reactor heavy constituent extraction mouth of the first dehydration rectifier unit and the second dehydration rectifier unit
The tower reactor heavy constituent extraction mouth of mouth connection, the second dehydration rectifier unit is connect with the feed inlet of NMP rectifier unit, NMP rectifying dress
The feed inlet of the tower top light component extraction mouth and adsorbent equipment set connects, and the eluent inlet and eluent of adsorbent equipment supply
Device connection, fills adsorbent in adsorbent equipment, the tower top light component extraction mouth of the first dehydration rectifier unit and absorption plant
Inlet connection, the tower top light component extraction mouth of the second dehydration rectifier unit and the entrance of buffer unit connect.
In technical solution, it is preferred that adsorbent equipment includes the first adsorption tower and the second adsorption tower, the tower of NMP rectifier unit
Top light component extraction mouth is connect with the feed inlet of the feed inlet of the first adsorption tower and the second adsorption tower respectively, and the first adsorption tower is washed
The eluent inlet of de- liquid inlet and the second adsorption tower is connect with the liquid outlet of elution liquid supplying device respectively, the first absorption
The eluent inlet of tower, the eluent inlet of the second adsorption tower, the feed inlet of the first adsorption tower and the second adsorption tower into
Shut-off valve is equipped in material mouth.
In technical solution, it is preferred that the first dehydration rectifier unit includes first rectifying column, the first condenser, first boils again
The outlet of device and the first preheater, buffer unit is connect with the entrance of the first preheater, the outlet of the first preheater and the first essence
The feed inlet connection of tower is evaporated, the overhead gas outlet of first rectifying column is connect with the entrance of the first condenser, the first condenser
Outlet is connect with the overhead reflux entrance of first rectifying column all the way, and the tower top light component extraction mouth of another way and first rectifying column connects
It connects, the tower reactor liquid outlet of first rectifying column is connect with the entrance of the first reboiler all the way, the tower of another way and first rectifying column
Kettle heavy constituent produces mouth connection, and the outlet of the first reboiler and the tower reactor reflux inlet of first rectifying column connect.
In technical solution, it is preferred that the first dehydration rectifier unit further includes First Heat Exchanger, the tower overhead gas of first rectifying column
Body outlet is connect with the thermal medium entrance of First Heat Exchanger, and the entrance of the thermal medium outlet of First Heat Exchanger and the first condenser connects
It connects, the outlet of buffer unit and the cold medium entrance of First Heat Exchanger connect, and the cold medium outlet of First Heat Exchanger and first is in advance
The entrance of hot device connects.
In technical solution, it is preferred that the second dehydration rectifier unit includes Second distillation column, the second condenser, second boils again
The tower reactor heavy constituent extraction mouth of device and the second preheater, the first dehydration rectifier unit is connect with the entrance of the second preheater, and second
The outlet of preheater and the feed inlet of Second distillation column connect, the overhead gas outlet of Second distillation column and entering for the second condenser
Mouth connection, the outlet of the second condenser are connect with the overhead reflux entrance of Second distillation column all the way, another way and Second distillation column
Tower top light component extraction mouth connection, the tower reactor liquid outlet of Second distillation column connect with the entrance of the second reboiler all the way, separately
It is connect all the way with the tower reactor heavy constituent of Second distillation column extraction mouth, the outlet of the second reboiler and the tower reactor of Second distillation column flow back
Entrance connection.
In technical solution, it is preferred that the second dehydration rectifier unit further includes the second heat exchanger, the tower overhead gas of Second distillation column
Body outlet is connect with the thermal medium entrance of the second heat exchanger, and the entrance of the thermal medium outlet of the second heat exchanger and the second condenser connects
It connects, the tower reactor heavy constituent extraction mouth of the first dehydration rectifier unit is connect with the cold medium entrance of the second heat exchanger, the second heat exchanger
Cold medium outlet connect with the entrance of the second preheater.
In technical solution, it is preferred that NMP rectifier unit includes third distillation column, third condenser, third reboiler and
The tower reactor heavy constituent extraction mouth of three preheaters, the second dehydration rectifier unit is connect with the entrance of third preheater, third preheater
Outlet and the feed inlet of third distillation column connect, the outlet of the overhead gas of third distillation column and the entrance of third condenser connect
It connects, the outlet of third condenser is connect with the overhead reflux entrance of third distillation column all the way, the tower of another way and third distillation column
Light component extraction mouth connection is pushed up, the tower reactor liquid outlet of third distillation column is connect with the entrance of third reboiler all the way, another way
It is connect with the tower reactor heavy constituent of third distillation column extraction mouth, the outlet of third reboiler and the tower reactor reflux inlet of third distillation column
Connection.
In technical solution, it is preferred that NMP rectifier unit further includes third heat exchanger, and the overhead gas of third distillation column goes out
Mouth is connect with the thermal medium entrance of third heat exchanger, and the thermal medium outlet of third heat exchanger is connect with the entrance of third condenser,
The liquid outlet of elution liquid supplying device connect with the cold medium entrance of third heat exchanger, and the cold medium of third heat exchanger exports and the
The eluent inlet of one adsorption tower and the eluent inlet of the second adsorption tower are separately connected.
In technical solution, it is preferred that absorption plant includes absorption tower and reflux pump, and the gas feed on absorption tower and NMP are useless
The lean solution of the connection of gas source, the tower top light component extraction mouth and absorption tower that absorb agent feeding device and the first dehydration rectifier unit enters
Mouth connection, the rich solution outlet on absorption tower passes through reflux pump all the way and the rich solution reflux inlet on absorption tower connects, another way and buffering
The entrance of device connects.
The utility model has the advantages and positive effects of:
1. the recycling refining plant is absorbed using absorption tower, and is handled through three concatenated rectifying column rectification and purifications, finally
Remove minor amount of water and heavy metal through adsorption tower, electrode material of lithium battery can be produced in the NMP that volatilizees recycle and purifies, finally divide
From electron level nmp solvent is obtained, the solvent that can be directly used as positive and negative pole material in lithium battery production is used, and substantially increases NMP
Availability；
, can be significantly to the adsorbent zeolite regeneration in another set of adsorption tower when 2. a set of adsorption treatment of two sets of adsorption towers is arranged
The processing time is saved, treatment effeciency is improved；
3. adsorption tower eluent and the top of the distillation column steam heat-exchanging improve Eluant temperature, adsorbent reactivation processing can be improved
When heavy metal elution rate；
4. the waste water that rectifying is isolated in the device is recycled by NMP waste gas absorbing system, closed loop is formed inside device
Circulation, the tower of entire gas outlet the discharge exhaust gas containing micro NMP and NMP rectifying column for recycling only absorption tower in refining plant
The kettle that kettle heavy constituent outlet drain contains a small amount of NMP is residual, and the dangerous waste of device, waste liquid outlet side are few, and discharge amount is small, realizes circulation
Economy and green chemical industry；
5. realizing the effective use of waste heat in device, equipment energy consumption is reduced, it is energy saving.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of NMP recycling purification apparatus in the lithium battery production of the utility model embodiment.
In figure:
1, absorption plant 2, dehydration rectifier unit 3, dehydration rectifier unit
4, NMP rectifier unit 5, rectifying column 6, condenser
7, reboiler 8, preheater 9, heat exchanger
10, rectifying column 11, condenser 12, reboiler
13, preheater 14, heat exchanger 15, buffer unit
16, agent feeding device 17, absorption tower 18, reflux pump are absorbed
19, adsorbent equipment 20, elution liquid supplying device 21, adsorption tower
22, adsorption tower
Specific embodiment
The embodiment of the present invention is described further below with reference to embodiment:
As shown in Figure 1, the equipment of NMP recycling purification includes absorption plant in a kind of production of lithium battery described in the present embodiment
1, buffer unit 15, dehydration rectifier unit 2, dehydration rectifier unit 3, NMP rectifier unit 4 and adsorbent equipment 19, absorption plant 1
Inlet is connect with agent feeding device 16 is absorbed, and the liquid outlet of absorption plant 1 is connect with the entrance of buffer unit 15, buffer unit
15 outlet is connect with the feed inlet of dehydration rectifier unit 2, the tower reactor heavy constituent extraction mouth of dehydration rectifier unit 2 and dehydration rectifying
The feed inlet of device 3 connects, and the tower reactor heavy constituent extraction mouth of dehydration rectifier unit 3 is connect with the feed inlet of NMP rectifier unit 4,
The tower top light component extraction mouth of NMP rectifier unit 4 is connect with the feed inlet of adsorbent equipment 19, the eluent feed liquor of adsorbent equipment 19
Mouth is connect with elution liquid supplying device 20, and adsorbent, the tower top light component extraction of dehydration rectifier unit 2 are filled in adsorbent equipment 19
Mouth is connect with the inlet of absorption plant 1, and the tower top light component extraction mouth of dehydration rectifier unit 3 and the entrance of buffer unit 15 connect
It connects.In absorption plant 1 using water as absorbent by electrode material of lithium battery produce in the NMP that volatilizees absorb, absorbing liquid is sent to slow
It rushes in tank 15 and collects, the NMP absorbing liquid in surge tank 15 is sent into three series connection rectifier units and carries out rectification and purification, and absorbing liquid is through de-
Crystal's distillation unit 2 carries out preliminary hydro-extraction, overhead extraction water, and tower reactor produces NMP and part water, the heavy constituent for then producing tower reactor
It is passed through in dehydration rectifier unit 3 and is further dehydrated, the water in NMP is further separated after the second dehydration rectifier unit 3, is dehydrated
The overhead extraction NMP and water of rectifier unit 3, tower reactor extraction for predominantly NMP and containing a small amount of weight heterocompound, metal ion,
Free ammonium, the heavy constituent of water, tower reactor heavy constituent is passed through NMP rectifier unit 4 and further purifies wherein NMP, through NMP rectifier unit 4
After separation, overhead extraction is NMP of the concentration not less than 99.9%, water of the concentration no more than 100mg/L, concentration are not more than 1mg/L
Free ammonium, concentration be not more than 1mg/L metal ion, tower reactor extraction contains 50%-80%NMP, a small amount of heavy metal ion, trip
Heavy constituent from ammonium, the tower top light component of NMP rectifier unit 4 enter adsorbent equipment 19 and are further processed, fill out in adsorbent equipment 19
There are adsorbent, such as molecular sieve, active carbon, chitosan microball etc., has to minor amount of water remaining in NMP and heavy metal ion very strong
Absorption property, through adsorbent equipment 19 processing after obtain it is aqueous be less than 50mg/L, the electricity without containing free ammonium and heavy metal ion
Sub- grade nmp solvent.The device is absorbed using absorption tower, through three concatenated rectifying column rectifying, and through adsorption tower removing water and again
Metal ion, electrode material of lithium battery can be produced in the NMP that volatilizees recycle and purify, electron level NMP finally can be obtained, can be straight
The solvent use for being used as positive and negative pole material in lithium battery production is connect, the availability of NMP is substantially increased.Wherein it is dehydrated rectifier unit
2 tower top light component extraction mouth is connect with the inlet of absorption plant 1, will be dehydrated the water that rectifier unit 2 is isolated and is further drawn
Enter absorption plant 1 to reuse as absorbent, can be used as the supplement of absorbent, reduces the consumption of water when absorbing NMP, and will
The waste liquid circulation of rectifier unit 2 utilizes；And it is dehydrated in the tower top light component extraction of rectifier unit 3 still containing 50%-85% or so
NMP, which is introduced into surge tank 15, the charging as rectifier unit 2 again, with the NMP absorbed from absorption plant 1
Waste liquid, so that the waste liquid circulation of rectifier unit 3 be utilized, takes full advantage of the NMP in waste liquid together as charging.In the device
The waste water that rectifying is isolated is recycled by NMP waste gas absorbing system, and closed loop cycle, entire recycling purification dress are formed inside device
The tower reactor heavy constituent outlet drain of exhaust gas of the gas outlet discharge containing micro NMP and NMP rectifying column that there was only absorption tower in setting contains
There is the kettle of a small amount of NMP residual, the dangerous waste of device, waste liquid outlet side are few, and discharge amount is small, realizes circular economy and green chemical industry.
Preferably, adsorbent equipment 19 includes adsorption tower 21 and adsorption tower 22, and the tower top light component of NMP rectifier unit 4 produces
Mouth is connect with the feed inlet of the feed inlet of adsorption tower 21 and adsorption tower 22 respectively, the eluent inlet and adsorption tower of adsorption tower 21
22 eluent inlet is connect with the liquid outlet of elution liquid supplying device 20 respectively, and the eluent inlet of adsorption tower 21 is inhaled
It is equipped with shut-off valve on the feed inlet of the eluent inlet of attached tower 22, the feed inlet of adsorption tower 21 and adsorption tower 22, passes through tune
The opening and closing for saving shut-off valve may be controlled to an adsorption tower processing charging, while be passed through eluent to suction in another adsorption tower
Attached dose of progress zeolite regeneration, improves treatment effeciency, also may be controlled to two adsorption towers at the time needed for saving adsorption tower regeneration
Charging is handled simultaneously, improves treatment effeciency.
Preferably, adsorption tower, i.e. buffer unit 15 can also be set between dehydration rectifier unit 2 after buffer unit 15
Outlet and adsorption tower entrance connect, adsorption tower outlet be dehydrated rectifier unit 2 feed inlet connect, filled in adsorption tower
The adsorbents such as molecular sieve, active carbon, diatomite, in NMP waste liquid to be processed water and heavy metal ion to carry out preliminary absorption de-
It removes, since there are heavy metal ion in NMP waste liquid to be processed, is dehydrated when rectifier unit 2 separates it and needs higher time
Ratio is flowed, the higher energy consumption of the generation of equipment can be made, and after adsorption tower is added herein to the heavy metal preliminary treatment in waste liquid, it can make
The reflux ratio of postorder rectifier unit reduces, to reduce equipment energy consumption.
Preferably, it includes rectifying column 5, condenser 6, reboiler 7 and preheater 8, buffering that rectifier unit 2 is dehydrated in the device
The outlet of device 15 is connect with the entrance of preheater 8, and the outlet of preheater 8 is connect with the feed inlet of rectifying column 5, rectifying column 5
Overhead gas outlet is connect with the entrance of condenser 6, and the outlet of condenser 6 is connect with the overhead reflux entrance of rectifying column 5 all the way,
The tower top light component extraction mouth of another way and rectifying column 5 connect, and the tower reactor liquid outlet of rectifying column 5 enters with reboiler 7 all the way
Mouth connection, another way are connect with the tower reactor heavy constituent of rectifying column 5 extraction mouth, and the outlet of reboiler 7 and the tower reactor of rectifying column 5 flow back
Entrance connection.
It is furthermore preferred that dehydration rectifier unit 2 further includes heat exchanger 9, overhead gas outlet and the heat exchanger 9 of rectifying column 5
The connection of thermal medium entrance, the thermal medium outlet of heat exchanger 9 are connect with the entrance of condenser 6, the outlet and heat exchange of buffer unit 15
The cold medium entrance of device 9 connects, and the cold medium outlet of heat exchanger 9 is connect with the entrance of preheater 8.5 overhead extraction of rectifying column
Heat exchange occurs between high-temperature gas and feeding liquid, pre-cools high-temperature gas before entering condenser, it can
The energy consumption for saving condenser is pre-heated feeding liquid before entering preheater, can save the energy of preheater
Consumption, and the waste heat for generating high-temperature gas condensation is used effectively, and reduces energy dissipation.
Preferably, dehydration rectifier unit 3 includes rectifying column 10, condenser 11, reboiler 12 and preheater 13, is dehydrated rectifying
The tower reactor heavy constituent extraction mouth of device 2 is connect with the entrance of preheater 13, the outlet of preheater 13 and the feed inlet of rectifying column 10
Connection, rectifying column 10 overhead gas outlet is connect with the entrance of condenser 11, the outlet of condenser 11 all the way with rectifying column 10
The connection of overhead reflux entrance, the tower top light component of another way and rectifying column 10 produces mouth and connect, the tower reactor liquid of rectifying column 10
Outlet is connect with the entrance of reboiler 12 all the way, and another way is connect with the tower reactor heavy constituent of rectifying column 10 extraction mouth, reboiler 12
Outlet connect with the tower reactor reflux inlet of rectifying column 10.
It is furthermore preferred that dehydration rectifier unit 3 further includes heat exchanger 14, overhead gas outlet and the heat exchanger 14 of rectifying column 10
The connection of thermal medium entrance, the thermal medium outlet of heat exchanger 14 connect with the entrance of condenser 11, the tower reactor of dehydration rectifier unit 2
Heavy constituent extraction mouth is connect with the cold medium entrance of heat exchanger 14, and the cold medium outlet of heat exchanger 14 and the entrance of preheater 13 connect
It connects.Heat exchange occurs between the high-temperature gas and feeding liquid of 10 overhead extraction of rectifying column, on the one hand makes high-temperature gas cold in entrance
It is pre-cooled before condenser, the energy consumption of condenser can be saved, on the other hand make feeding liquid preparatory before entering preheater
Heating, can save the energy consumption of preheater, and the waste heat for generating high-temperature gas condensation is used effectively, and reduces energy dissipation.
Preferably, NMP rectifier unit 4 includes rectifying column, condenser, reboiler and preheater, is dehydrated the tower of rectifier unit 3
Kettle heavy constituent produces mouth and the entrance of preheater connects, and the outlet of preheater and the feed inlet of rectifying column connect, the tower of rectifying column
The entrance for pushing up gas vent and condenser connects, and the outlet of condenser is connect with the overhead reflux entrance of rectifying column all the way, another
The tower top light component of road and rectifying column produces mouth connection, and the tower reactor liquid outlet of rectifying column is connect with the entrance of reboiler all the way,
Another way and the extraction mouth connection of the tower reactor heavy constituent of rectifying column, the outlet of reboiler and the tower reactor reflux inlet of rectifying column connect.
It is furthermore preferred that NMP rectifier unit 4 further includes heat exchanger, the overhead gas outlet of rectifying column and the heat of heat exchanger are situated between
The entrance of the connection of matter entrance, the thermal medium outlet of heat exchanger and condenser connects, and elutes the liquid outlet of liquid supplying device 20 and changes
The cold medium entrance of hot device connects, and the eluent import of the cold medium outlet adsorption tower 21,22 of heat exchanger is separately connected.By NMP
The overhead vapours of rectifier unit 4 exchanges heat with eluent, is heated eluent, and high temperature can be accelerated to be desorbed, and washes adsorbent
Desorption rate greatly improves when de-, improves adsorbent reactivation efficiency, and the waste heat of rectifying column, energy saving is effectively utilized.
In technical solution, it is preferred that NMP rectifier unit further includes third heat exchanger, the tower overhead gas of the third distillation column
Body outlet is connect with the thermal medium entrance of the third heat exchanger, and the thermal medium outlet and the third of the third heat exchanger are cold
The entrance of condenser connects, and the liquid outlet of the elution liquid supplying device is connect with the cold medium entrance of the third heat exchanger, institute
State the elution of the cold medium outlet and the eluent inlet and second adsorption tower of first adsorption tower of third heat exchanger
Liquid inlet is separately connected.
Preferably, absorption plant 1 includes absorption tower 17 and reflux pump 18, and the gas feed on absorption tower 17 and NMP exhaust gas come
Source connection absorbs agent feeding device 16 and is dehydrated the lean solution entrance of tower top light component the extraction mouth and absorption tower 17 of rectifier unit 2
Connection, the rich solution outlet on absorption tower 17 passes through reflux pump 18 all the way and connect with the rich solution reflux inlet on absorption tower 17, another way and
The entrance of buffer unit 15 connects.
NMP recycling purification apparatus is absorbed using absorption tower in the production of lithium battery described in the present embodiment, concatenated through three
Rectifying column rectifying, and remove water and heavy metal ion through adsorption tower, electrode material of lithium battery can be produced in the NMP recycling volatilized
And purify, electron level nmp solvent can be obtained in final separation, and the solvent that can be directly used for positive and negative pole material in lithium battery production makes
With substantially increasing the availability of NMP；To the adsorbent in another set of adsorption tower when a set of adsorption treatment of two sets of adsorption towers is arranged
Zeolite regeneration can greatly save the processing time, improve treatment effeciency；Adsorption tower eluent and the top of the distillation column steam heat-exchanging improve
Eluant temperature, the elution rate of heavy metal when adsorbent reactivation processing can be improved；The waste water quilt that rectifying is isolated in the device
NMP waste gas absorbing system recycles, and forms closed loop cycle inside device, entire to recycle in refining plant going out for only absorption tower
The kettle that the tower reactor heavy constituent outlet drain of exhaust gas of the port discharge containing micro NMP and NMP rectifying column contains a small amount of NMP is residual, dress
The dangerous waste set, waste liquid outlet side are few, and discharge amount is small, realizes circular economy and green chemical industry；Realize waste heat in device has
Effect utilizes, and reduces equipment energy consumption, energy saving.
One embodiment of the utility model is described in detail above, but the content is only the utility model
Preferred embodiment should not be considered as limiting the scope of the present invention.It is all to be made according to application scope of the utility model
All the changes and improvements etc., should still belong within the patent covering scope of the utility model.
Claims (9)
1. the equipment of the accurate processing of NMP recycling purification in a kind of lithium battery production, it is characterised in that: including absorption plant, buffering
Device, the first dehydration rectifier unit, the second dehydration rectifier unit, NMP rectifier unit and adsorbent equipment, the absorption plant into
Liquid mouth is connect with agent feeding device is absorbed, and the liquid outlet of the absorption plant is connect with the entrance of the buffer unit, described slow
The outlet of flushing device is connect with the feed inlet of the first dehydration rectifier unit, the tower reactor recombination of the first dehydration rectifier unit
Extraction mouth and the feed inlet of the second dehydration rectifier unit is divided to connect, the tower reactor heavy constituent of the second dehydration rectifier unit is adopted
Outlet is connect with the feed inlet of the NMP rectifier unit, the tower top light component extraction mouth of the NMP rectifier unit and the absorption
The feed inlet of device connects, and the eluent inlet of the adsorbent equipment is connect with elution liquid supplying device, the adsorbent equipment
Middle filling adsorbent, the tower top light component extraction mouth of the first dehydration rectifier unit and the inlet of the absorption plant connect
It connects, the tower top light component extraction mouth of the second dehydration rectifier unit is connect with the entrance of the buffer unit.
2. the equipment of the accurate processing of NMP recycling purification in lithium battery production according to claim 1, it is characterised in that: institute
State adsorbent equipment include the first adsorption tower and the second adsorption tower, the NMP rectifier unit tower top light component extraction mouth respectively with
The feed inlet of first adsorption tower is connected with the feed inlet of second adsorption tower, the eluent feed liquor of first adsorption tower
The eluent inlet of mouth and second adsorption tower is connect with the liquid outlet of the elution liquid supplying device respectively, and described first
The eluent inlet of adsorption tower, the eluent inlet of second adsorption tower, the feed inlet of first adsorption tower and institute
It states and is equipped with shut-off valve on the feed inlet of the second adsorption tower.
3. the equipment of the accurate processing of NMP recycling purification in lithium battery production according to claim 1 or 2, it is characterised in that:
The first dehydration rectifier unit includes first rectifying column, the first condenser, the first reboiler and the first preheater, the buffering
The outlet of device connect with the entrance of first preheater, the outlet of first preheater and the first rectifying column into
The overhead gas outlet of material mouth connection, the first rectifying column is connect with the entrance of first condenser, first condensation
The outlet of device is connect with the overhead reflux entrance of the first rectifying column all the way, and the tower top of another way and the first rectifying column is light
Component produces mouth connection, and the tower reactor liquid outlet of the first rectifying column is connect with the entrance of first reboiler all the way, separately
It is connect all the way with the tower reactor heavy constituent of first rectifying column extraction mouth, the outlet of first reboiler and first rectifying
The tower reactor reflux inlet of tower connects.
4. the equipment of the accurate processing of NMP recycling purification in lithium battery production according to claim 3, it is characterised in that: institute
Stating the first dehydration rectifier unit further includes First Heat Exchanger, the overhead gas outlet of the first rectifying column and first heat exchange
The thermal medium entrance of device connects, and the thermal medium outlet of the First Heat Exchanger is connect with the entrance of first condenser, described
The outlet of buffer unit is connect with the cold medium entrance of the First Heat Exchanger, the cold medium outlet of the First Heat Exchanger and institute
State the entrance connection of the first preheater.
5. the equipment of the accurate processing of NMP recycling purification in lithium battery production according to claim 1 or 2, it is characterised in that:
The second dehydration rectifier unit includes Second distillation column, the second condenser, the second reboiler and the second preheater, and described first
The tower reactor heavy constituent extraction mouth of dehydration rectifier unit is connect with the entrance of second preheater, the outlet of second preheater
It is connect with the feed inlet of the Second distillation column, the overhead gas outlet of the Second distillation column and entering for second condenser
Mouth connection, the outlet of second condenser are connect with the overhead reflux entrance of the Second distillation column all the way, another way and institute
The tower top light component extraction mouth connection of Second distillation column is stated, the tower reactor liquid outlet of the Second distillation column is all the way with described second
The entrance of reboiler connects, and another way is connect with the tower reactor heavy constituent of Second distillation column extraction mouth, second reboiler
Outlet connect with the tower reactor reflux inlet of the Second distillation column.
6. the equipment of the accurate processing of NMP recycling purification in lithium battery production according to claim 5, it is characterised in that: institute
Stating the second dehydration rectifier unit further includes the second heat exchanger, the overhead gas outlet of the Second distillation column and second heat exchange
The thermal medium entrance of device connects, and the thermal medium outlet of second heat exchanger is connect with the entrance of second condenser, described
The tower reactor heavy constituent extraction mouth of first dehydration rectifier unit is connect with the cold medium entrance of second heat exchanger, and described second changes
The cold medium outlet of hot device is connect with the entrance of second preheater.
7. the equipment of the accurate processing of NMP recycling purification in lithium battery production according to claim 2, it is characterised in that: institute
Stating NMP rectifier unit includes third distillation column, third condenser, third reboiler and third preheater, the second dehydration essence
Distillation unit tower reactor heavy constituent extraction mouth connect with the entrance of the third preheater, the outlet of the third preheater with it is described
The feed inlet of third distillation column connects, and the overhead gas outlet of the third distillation column and the entrance of the third condenser connect
It connects, the outlet of the third condenser is connect with the overhead reflux entrance of the third distillation column all the way, another way and described the
The tower top light component extraction mouth connection of three rectifying columns, the tower reactor liquid outlet of the third distillation column are boiled with the third again all the way
The entrance of device connects, and another way is connect with the tower reactor heavy constituent of third distillation column extraction mouth, and the third reboiler goes out
Mouth is connect with the tower reactor reflux inlet of the third distillation column.
8. the equipment of the accurate processing of NMP recycling purification in lithium battery production according to claim 7, it is characterised in that: institute
Stating NMP rectifier unit further includes third heat exchanger, overhead gas outlet and the third heat exchanger of the third distillation column
The connection of thermal medium entrance, the thermal medium outlet of the third heat exchanger are connect with the entrance of the third condenser, the elution
The liquid outlet of liquid supplying device is connect with the cold medium entrance of the third heat exchanger, the cold medium outlet of the third heat exchanger
It is separately connected with the eluent inlet of first adsorption tower and the eluent inlet of second adsorption tower.
9. the equipment of the accurate processing of NMP recycling purification in lithium battery production according to claim 1 or 2, it is characterised in that:
The absorption plant includes absorption tower and reflux pump, and the gas feed on the absorption tower is connect with NMP source exhaust gas, the absorption
The tower top light component extraction mouth of agent feeding device and the first dehydration rectifier unit is connect with the lean solution entrance on the absorption tower,
The rich solution outlet on the absorption tower passes through the reflux pump all the way and connect with the rich solution reflux inlet on the absorption tower, another way with
The entrance of the buffer unit connects.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821128130.3U CN208814924U (en) | 2018-07-17 | 2018-07-17 | The equipment of the accurate processing of NMP recycling purification in a kind of production of lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821128130.3U CN208814924U (en) | 2018-07-17 | 2018-07-17 | The equipment of the accurate processing of NMP recycling purification in a kind of production of lithium battery |
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| CN208814924U true CN208814924U (en) | 2019-05-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167146A (en) * | 2019-12-26 | 2020-05-19 | 重庆市中润化学有限公司 | NMP waste liquid is retrieved with dehydration tower |
| CN111978233A (en) * | 2020-09-15 | 2020-11-24 | 安徽英特力工业工程技术有限公司 | Device for improving purity of NMP crude product after methylamine removal |
-
2018
- 2018-07-17 CN CN201821128130.3U patent/CN208814924U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167146A (en) * | 2019-12-26 | 2020-05-19 | 重庆市中润化学有限公司 | NMP waste liquid is retrieved with dehydration tower |
| CN111978233A (en) * | 2020-09-15 | 2020-11-24 | 安徽英特力工业工程技术有限公司 | Device for improving purity of NMP crude product after methylamine removal |
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