CN208604047U - The equipment of NMP recycling purification in a kind of production of lithium battery - Google Patents
The equipment of NMP recycling purification in a kind of production of lithium battery Download PDFInfo
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Abstract
The utility model provides the equipment of NMP recycling purification in a kind of production of lithium battery, including absorption plant, buffer unit, first dehydration rectifier unit, second dehydration rectifier unit and NMP rectifier unit, absorption plant is connect with buffer unit, buffer unit outlet is connect with the first dehydration rectifier unit feed inlet, first dehydration rectifier unit tower reactor heavy constituent extraction mouth is connect with the second dehydration rectifier unit feed inlet, second dehydration rectifier unit tower reactor heavy constituent extraction mouth is connect with NMP rectifier unit feed inlet, 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, by lithium battery produce in NMP waste gas recovery purify can be directly used as electron level nmp solvent lithium battery produce in solvent, NMP availability height；The waste liquid of generation is recycled, and forms closed loop, the dangerous waste outlet side of device is few, and discharge amount is small, realizes circular economy and green chemical industry.
Description
Technical field
The utility model belongs to lithium battery production technical field, recycles essence more particularly, to NMP in a kind of production of lithium battery
The equipment of system.
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
The equipment that problem to be solved in the utility model is to provide NMP recycling purification in a kind of production of lithium battery, can be by lithium
The NMP gas volatilized in battery plus-negative plate material, diaphragm production process is recycled and is purified, and electron level nmp solvent is obtained,
It can be directly used for the solvent of positive and negative pole material 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 NMP recycling purification in a kind of production of lithium battery, including absorption plant, buffer unit, the first dehydration rectifying
Device, the second dehydration rectifier unit and NMP rectifier unit, the inlet of absorption plant are connect with agent feeding device is absorbed, and are absorbed
The liquid outlet of device and the entrance of buffer unit connect, and the outlet of buffer unit and the feed inlet of the first dehydration rectifier unit connect
It connects, the tower reactor heavy constituent extraction mouth of the first dehydration rectifier unit is connect with the feed inlet of the second dehydration rectifier unit, the second dehydration
The tower reactor heavy constituent extraction mouth of rectifier unit is connect with the feed inlet of NMP rectifier unit, and the tower top of the first dehydration rectifier unit is light
Component produces mouth and the inlet of absorption plant connects, the tower top light component extraction mouth and buffer unit of the second dehydration rectifier unit
Entrance connection.
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 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.
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,
Second dehydration rectifier unit tower reactor heavy constituent extraction mouth connect with the cold medium entrance of third heat exchanger, third heat exchanger it is cold
Media outlet is connect with the entrance of third preheater.
The utility model has the advantages and positive effects of: the recycling refining plant uses three tower cascade connected mode, can incite somebody to action
The NMP to volatilize in electrode material of lithium battery production is recycled and is purified, and final separation obtains electron level nmp solvent, can be directly used as
The solvent of positive and negative pole material uses in lithium battery production, substantially increases the availability of NMP；What rectifying was isolated in the device is useless
Water is recycled by NMP waste gas absorbing system, and closed loop cycle is formed inside device, and entire recycle only has absorption tower in refining plant
Exhaust gas of the gas outlet discharge containing micro NMP and the tower reactor heavy constituent outlet drain of NMP rectifying column contain 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；Realize waste heat in device
Effective use, reduce equipment energy consumption, 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
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 and NMP rectifier unit 4, the inlet of absorption plant 1 and suction
Agent feeding device 16 is received to connect, the liquid outlet of absorption plant 1 connect with the entrance of buffer unit 15, the outlet of buffer unit 15 and
Be dehydrated rectifier unit 2 feed inlet connection, dehydration rectifier unit 2 tower reactor heavy constituent extraction mouth and be dehydrated rectifier unit 3 into
The tower reactor heavy constituent extraction mouth of material mouth connection, dehydration rectifier unit 3 is connect with the feed inlet of NMP rectifier unit 4, dehydration rectifying dress
Set 2 tower top light component extraction mouth connect with the inlet of absorption plant 1, be dehydrated rectifier unit 3 tower top light component extraction mouth
It is connect with the entrance of buffer unit 15.In absorption plant 1 using water as absorbent by electrode material of lithium battery produce in the NMP that volatilizees
It absorbs, absorbing liquid is sent into surge tank 15 and is collected, the NMP absorbing liquid in surge tank 15 is sent into three series connection rectifier units and is carried out
Rectification and purification, absorbing liquid carry out preliminary hydro-extraction, overhead extraction water through dehydration rectifier unit 2, and tower reactor produces NMP and part water, so
The heavy constituent that tower reactor produces is passed through in dehydration rectifier unit 3 afterwards and is further dehydrated, by NMP after the second dehydration rectifier unit 3
In water further separate, be dehydrated the overhead extraction NMP and water of rectifier unit 3, tower reactor extraction is for predominantly NMP and containing a small amount of
Weight heterocompound, metal ion, free ammonium, the heavy constituent of water, tower reactor heavy constituent are passed through NMP rectifier unit 4 and further purify it
Middle NMP, after the separation of NMP rectifier unit 4, overhead extraction is NMP of the concentration not less than 99.9%, concentration is not more than 100mg/L
Water, concentration be not more than the metal ion of 1mg/L no more than the free ammonium of 1mg/L, concentration, tower reactor extraction contains 50%-80%
NMP, on a small quantity weigh heterocompound, metal ion, free ammonium heavy constituent.The device uses three tower cascade connected mode, can be by lithium battery
The NMP to volatilize in electrode material production is recycled and is purified, and 4 tower top of NMP rectifying column can produce electron level NMP, can be directly used as lithium
The solvent of positive and negative pole material uses in battery production, substantially increases the availability of NMP.Wherein it is dehydrated the tower top of rectifier unit 2
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 introduced into absorption dress
It sets 1 to reuse as absorbent, can be used as the supplement of absorbent, reduce the consumption of water when absorbing NMP, and by rectifier unit
2 waste liquid circulation utilizes；And be dehydrated in the tower top light component extraction of rectifier unit 3 still containing the NMP of 50%-80% or so, it should
Device is introduced into surge tank 15, again the charging as rectifier unit 2, together with from the NMP waste liquid that absorption plant 1 absorbs
As charging, so that the waste liquid circulation of rectifier unit 3 be utilized, the NMP in waste liquid is taken full advantage of.Rectifying separates in the device
Waste water out is recycled by NMP waste gas absorbing system, and closed loop cycle is formed inside device, entire to recycle in refining plant only
The exhaust gas of the gas outlet discharge containing micro NMP on absorption tower and the tower reactor heavy constituent outlet drain of NMP rectifying column contain a small amount of NMP
Kettle it is 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, 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, 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.
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 connection of matter entrance, the thermal medium outlet of heat exchanger and the entrance of condenser connect, the tower reactor heavy constituent extraction of dehydration rectifier unit 3
Mouth is connect with the cold medium entrance of heat exchanger, and the cold medium outlet of heat exchanger is connect with the entrance of preheater.It adopts the top of the distillation column
Heat exchange occurs between high-temperature gas and feeding liquid out, on the one hand makes high-temperature gas before entering condenser by cold in advance
But, the energy consumption of condenser can be saved, feeding liquid is pre-heated before entering preheater, preheater can be saved
Energy consumption, and make high-temperature gas condensation generate waste heat be used effectively, reduce energy dissipation.
NMP recycling purification apparatus uses three tower cascade connected mode in the production of lithium battery described in the present embodiment, can be by lithium battery
The NMP to volatilize in electrode material production is recycled and is purified, and electron level NMP can be obtained in final separation, and it is raw to can be directly used for lithium battery
Solvent uses in production, substantially increases the availability of NMP；The waste water that rectifying is isolated in the device is by NMP waste gas absorbing system
It recycles, forms closed loop cycle inside device, the entire gas outlet discharge for recycling only absorption tower in refining plant is containing micro-
The kettle that the tower reactor heavy constituent outlet drain of the exhaust gas and NMP rectifying column of measuring NMP contains a small amount of NMP is residual, the dangerous waste of device, waste liquid row
Outlet is few, and discharge amount is small, realizes circular economy and green chemical industry；The effective use of waste heat in device is realized, equipment is reduced
Energy consumption, it is 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 (8)
1. the equipment of NMP recycling purification in a kind of lithium battery production, it is characterised in that: including absorption plant, buffer unit, first
It is dehydrated rectifier unit, the second dehydration rectifier unit and NMP rectifier unit, inlet and the absorbent supply of the absorption plant fill
Set connection, the liquid outlet of the absorption plant is connect with the entrance of the buffer unit, the outlet of the buffer unit with it is described
The feed inlet connection of first dehydration rectifier unit, the tower reactor heavy constituent extraction mouth and described second of the first dehydration rectifier unit
It is dehydrated the feed inlet connection of rectifier unit, the tower reactor heavy constituent extraction mouth of the second dehydration rectifier unit and the NMP rectifying
The feed inlet of device connects, the inlet of tower top light component the extraction mouth and the absorption plant of the first dehydration rectifier unit
The tower top light component extraction mouth of connection, the second dehydration rectifier unit is connect with the entrance of the buffer unit.
2. the equipment of NMP recycling purification according to claim 1, it is characterised in that: the first dehydration rectifier unit packet
First rectifying column, the first condenser, the first reboiler and the first preheater are included, the outlet of the buffer unit is pre- with described first
The entrance of hot device connects, and the outlet of first preheater is connect with the feed inlet of the first rectifying column, first rectifying
The overhead gas outlet of tower is connect with the entrance of first condenser, and the outlet of first condenser is all the way with described first
The overhead reflux entrance of rectifying column connects, and another way produces mouth with the tower top light component of the first rectifying column and connect, and described the
The tower reactor liquid outlet of one rectifying column is connect with the entrance of first reboiler all the way, another way and the first rectifying column
Tower reactor heavy constituent produces mouth connection, and the outlet of first reboiler is connect with the tower reactor reflux inlet of the first rectifying column.
3. the equipment of NMP recycling purification according to claim 2, it is characterised in that: the first dehydration rectifier unit is also
Including First Heat Exchanger, the overhead gas outlet of the first rectifying column is connect with the thermal medium entrance of the First Heat Exchanger,
The thermal medium outlet of the First Heat Exchanger is connect with the entrance of first condenser, the outlet of the buffer unit with it is described
The cold medium entrance of First Heat Exchanger connects, and the cold medium outlet of the First Heat Exchanger and the entrance of first preheater connect
It connects.
4. the equipment of NMP recycling purification according to claim 1 to 3, it is characterised in that: the second dehydration rectifying
Device includes Second distillation column, the second condenser, the second reboiler and the second preheater, the tower of the first dehydration rectifier unit
Kettle heavy constituent extraction mouth is connect with the entrance of second preheater, the outlet of second preheater and the Second distillation column
Feed inlet connection, the Second distillation column overhead gas outlet is connect with the entrance of second condenser, described second
The outlet of condenser is connect with the overhead reflux entrance of the Second distillation column all the way, the tower of another way and the Second distillation column
Light component extraction mouth connection is pushed up, the tower reactor liquid outlet of the Second distillation column connects with the entrance of second reboiler all the way
It connects, the tower reactor heavy constituent extraction mouth of another way and the Second distillation column connect, the outlet of second reboiler and described the
The tower reactor reflux inlet of two rectifying columns connects.
5. the equipment of NMP recycling purification according to claim 4, it is characterised in that: the second dehydration rectifier unit is also
Including the second heat exchanger, the overhead gas outlet of the Second distillation column is connect with the thermal medium entrance of second heat exchanger,
The thermal medium outlet of second heat exchanger is connect with the entrance of second condenser, the tower of the first dehydration rectifier unit
Kettle heavy constituent extraction mouth is connect with the cold medium entrance of second heat exchanger, the cold medium outlet of second heat exchanger and institute
State the entrance connection of the second preheater.
6. the equipment of NMP according to claim 1 to 3 recycling purification, it is characterised in that: the absorption plant includes
The gas feed of absorption tower and reflux pump, the absorption tower is connect with NMP source exhaust gas, the absorption agent feeding device and described
The tower top light component extraction mouth of first dehydration rectifier unit is connect with the lean solution entrance on the absorption tower, the rich solution on the absorption tower
Outlet is connect by the reflux pump with the rich solution reflux inlet on the absorption tower all the way, and another way enters with the buffer unit
Mouth connection.
7. the equipment of NMP recycling purification according to claim 1 to 3, it is characterised in that: the NMP rectifier unit packet
Include third distillation column, third condenser, third reboiler and third preheater, the tower reactor recombination of the second dehydration rectifier unit
Extraction mouth is divided to connect with the entrance of the third preheater, the outlet and the charging of the third distillation column of the third preheater
The overhead gas outlet of mouth connection, the third distillation column is connect with the entrance of the third condenser, the third condenser
Outlet connect all the way with the overhead reflux entrance of the third distillation column, light group of tower top of another way and the third distillation column
Divide extraction mouth connection, the tower reactor liquid outlet of the third distillation column is connect with the entrance of the third reboiler all the way, another
Road is connect with the tower reactor heavy constituent of third distillation column extraction mouth, the outlet and the third distillation column of the third reboiler
Tower reactor reflux inlet connection.
8. the equipment of NMP according to claim 7 recycling purification, it is characterised in that: the NMP rectifier unit further includes the
The overhead gas outlet of three heat exchangers, the third distillation column is connect with the thermal medium entrance of the third heat exchanger, and described the
The thermal medium outlet of three heat exchangers is connect with the entrance of the third condenser, the tower reactor recombination of the second dehydration rectifier unit
Extraction mouth is divided to connect with the cold medium entrance of the third heat exchanger, cold medium outlet and the third of the third heat exchanger
The entrance of preheater connects.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821172474.4U CN208604047U (en) | 2018-07-17 | 2018-07-17 | The equipment of NMP recycling purification in a kind of production of lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821172474.4U CN208604047U (en) | 2018-07-17 | 2018-07-17 | The equipment of NMP recycling purification in a kind of production of lithium battery |
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| Publication Number | Publication Date |
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| CN208604047U true CN208604047U (en) | 2019-03-15 |
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| CN201821172474.4U Active CN208604047U (en) | 2018-07-17 | 2018-07-17 | The equipment of NMP recycling purification in a kind of production of lithium battery |
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| Country | Link |
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2018
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