CN210229648U - Reconstituted tobacco extraction liquid membrane separation, purification and concentration system - Google Patents
Reconstituted tobacco extraction liquid membrane separation, purification and concentration system Download PDFInfo
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- CN210229648U CN210229648U CN201921117769.6U CN201921117769U CN210229648U CN 210229648 U CN210229648 U CN 210229648U CN 201921117769 U CN201921117769 U CN 201921117769U CN 210229648 U CN210229648 U CN 210229648U
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Abstract
The utility model relates to a reconstituted tobacco extraction liquid membrane separation, purification and concentration system, which comprises a first subsystem and a second subsystem which are connected in sequence; the first subsystem comprises an extract liquid storage tank, a stock solution pump, a filter, a first safety filter, a heat exchanger and an ultrafiltration membrane component which are connected in sequence; the second subsystem comprises a refined liquid storage tank, a first booster pump, a second security filter, a first high-pressure pump, a reverse osmosis membrane module and a pre-concentrated liquid storage tank which are connected in sequence, the second booster pump, a third security filter, a second high-pressure pump and a STRO membrane module are connected in sequence, and the output end of the STRO membrane module is respectively connected with the concentrated liquid storage tank and the permeate liquid storage tank; the output end of the ultrafiltration membrane component is connected with the input end of the refined liquid storage tank, and the output end of the ultrafiltration membrane component is provided with a return pipe connected with the extract liquid storage tank.
Description
Technical Field
The utility model belongs to the technical field of reconstituted tobacco, specifically relate to a reconstituted tobacco extraction liquid membrane separation purifies concentrated system.
Background
The paper-making process is used to reproduce tobacco leaves internationally for over half a century. In the later period of the 90 s in the 20 th century, the process is tested in Shantou, Hangzhou and other places in China to produce tobacco leaves, and then the process is expanded to the whole country. At present, the tobacco sheets are widely used in cigarette formulas at home and abroad. In some cigarette brands, the average blending proportion of reconstituted tobacco is more than 20%.
The paper-making method uses tobacco material such as tobacco powder, tobacco stem and tobacco shred as raw material, and according to a certain formula, the processes of leaching, solid-liquid separation, paper making, evaporation, concentration and coating, the tobacco component is extracted out to prepare coating liquor, and the insoluble tobacco raw material is undergone the processes of disintegration and grinding to obtain pulp, and then the pulp is dewatered, dried and made into sheet so as to obtain the tobacco sheet base. And finally, uniformly coating the prepared coating liquid on the film base, drying, tearing the film base, and preparing the reconstituted tobacco according to the technical requirements.
In the existing reconstituted tobacco production process, the extract is purified by a circular vibrating screen and a centrifugal machine, the purification effect is not ideal, and proteins, pectin lignin and the like which have negative effects on the quality in the extract cannot be removed. The purified extract is mainly concentrated by an MVR (mechanical vapor recompression) evaporator, and the MVR evaporator has the defects of small effective temperature difference, large heat exchange area, high equipment value and the like, and in addition, because the temperature is high (55 ℃) in the evaporation process, heat-sensitive components such as flavor substances and the like in the extract can also go bad or be lost, so that the quality of reconstituted tobacco is influenced.
Therefore, a (novel) filter is applied to the reconstituted tobacco production process, the filter adopts the solid-liquid separation principle of adsorption filtration of a suspension filter medium, the separation effect is obvious, the performance is stable, the filter is integrally manufactured, and the filter is easy to install, corrosion resistant, long in service life and small in occupied area.
As a novel separation technology, the membrane separation technology has the advantages of high separation precision, good separation effect, no phase change, low energy consumption, small occupied area and the like, and can be used as a device for deep separation and purification. However, the use of the above-mentioned filter based on the membrane separation technique still has disadvantages, for example, referring to chinese patent (publication No. CN 105286077B), a method for purifying an extract liquid from a paper-making reconstituted tobacco is disclosed, in which the extract liquid is passed through a mesh screen and a horizontal centrifuge in sequence to remove impurities, and then the extract liquid obtained after the impurities are removed is concentrated by a concentration device. The method can not remove fine insoluble substances and macromolecular (protein, pectin, lignin, etc.) soluble substances in the extractive solution. Refer to chinese patent (grant publication No. CN 203828052U) and disclose a paper-making process reconstituted tobacco extract low-temperature concentration system, which includes a pretreatment device, a refined liquid storage tank, a first-stage disc-tube reverse osmosis system, a second-stage disc-tube reverse osmosis system, a concentrated liquid storage tank, and a cleaning device connected in sequence, wherein the cleaning device is connected with the first-stage disc-tube reverse osmosis system, the system adopts a disc-tube reverse osmosis membrane for concentration, and the concentration of the extract can be concentrated from 2.5-8% to 30-45% of concentrated liquid at 5-40 ℃. The system adopts a two-stage disc tube type reverse osmosis (DTRO) membrane device to concentrate the extraction liquid, and has higher requirements on supporting equipment and higher energy consumption although higher concentration times can be achieved.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to extract purification and evaporative concentration problem that exists in the production of present paper-making method reconstituted tobacco, provide a reconstituted tobacco extract liquid membrane separation and purification concentration system, system simple structure is practical and effective, and area is little, the energy consumption is low.
For solving the technical problem, the utility model provides a technical scheme of system does: a reconstituted tobacco extraction liquid membrane separation purification concentration system comprises a first subsystem and a second subsystem which are sequentially connected;
the first subsystem comprises an extract liquid storage tank, a stock solution pump, a filter, a first safety filter, a heat exchanger and an ultrafiltration membrane component which are connected in sequence;
the second subsystem comprises a refined liquid storage tank, a first booster pump, a second security filter, a first high-pressure pump, a reverse osmosis membrane module and a pre-concentrated liquid storage tank which are connected in sequence, the second booster pump, a third security filter, a second high-pressure pump and a STRO membrane module are connected in sequence, and the output end of the STRO membrane module is respectively connected with the concentrated liquid storage tank and the permeate liquid storage tank;
the output end of the ultrafiltration membrane component is connected with the input end of the refined liquid storage tank, and the output end of the ultrafiltration membrane component is provided with a return pipe connected with the extract liquid storage tank.
Furthermore, the system also comprises a cleaning water tank and a cleaning pump; a backwash pump; a washing pump and an air compressor; the input end of the cleaning water tank is respectively communicated with the output ends of the ultrafiltration membrane module, the reverse osmosis membrane module and the STRO membrane module, the cleaning pump is arranged at the output end of the cleaning water tank, and the output end of the cleaning pump is respectively communicated with the input ends of the ultrafiltration membrane module, the reverse osmosis membrane module and the STRO membrane module; the backwashing pump is arranged at the output end of the refined liquid storage tank and connected with the input end of the extract liquid storage tank, and a backwashing pipeline of the backwashing pump is communicated with the ultrafiltration membrane component of the first subsystem; the flushing pump is arranged at the output end of the permeate liquid storage tank, and the output end of the flushing pump is communicated with the STRO membrane module; the air compressor is communicated with the ultrafiltration membrane component of the first subsystem.
Still further, a suspension filter medium is arranged at the upper part of the filter; the middle part consists of a water distribution plate and a polypropylene (PP) inclined pipe; the lower part is a concentrated solution area, and a sewage outlet is arranged on the filter.
Still further, the suspension filter medium in the filter is a spherical modified high polymer material with the diameter of 0.5-2mm and a surface microporous structure.
Still further, the ultrafiltration membrane in the ultrafiltration membrane component is one of an organic tubular membrane or a ceramic membrane; the reverse osmosis membrane module uses a Polyamide (PA) spiral membrane element.
Furthermore, the organic tubular membrane is a graphene modified PVDF membrane element, and the ceramic membrane is a silicon carbide material membrane element.
Furthermore, the system also comprises a control cabinet, wherein the control cabinet is arranged in the first subsystem to control the opening and closing of all the pumps of the system and the valves on the pipelines.
Furthermore, a sampling valve is arranged on the ultrafiltration membrane component; a sampling valve is arranged on the reverse osmosis membrane component; a sampling valve is arranged on the preconcentrate storage tank; a sampling valve is arranged on the STRO membrane component; a sampling valve is arranged on the concentrated solution storage tank; the permeate storage tank is provided with a sampling valve.
The technical scheme of the process provided by the utility model is as follows: a treatment process of a reconstituted tobacco extraction liquid membrane separation, purification and concentration system comprises the following steps:
first, passing through a first subsystem: (1) collecting the tobacco stem/tobacco powder extract liquid after soaking and extraction into an extract liquid storage tank; (2) opening a valve at the output end of the extraction liquid storage tank, and conveying the extraction liquid to a filter through a raw liquid pump; (3) filtering the extract liquor by the filter, and then feeding the extract liquor into a first safety filter; (4) then heating or controlling the temperature through a heat exchanger; (5) then the extract enters an ultrafiltration membrane component for separation and purification;
and then the second subsystem: (6) the permeate of the ultrafiltration membrane enters a refined liquid storage tank, and the concentrated solution of the ultrafiltration membrane flows back to the extract liquid storage tank; (7) after a valve at the output end of the refined liquid storage tank is opened, the refined liquid enters the reverse osmosis membrane component through the first booster pump, the second security filter and the first high-pressure pump in sequence; (8) after separation and concentration are carried out through a reverse osmosis membrane component, the pre-concentrated solution enters a pre-concentrated solution storage tank, and produced water is discharged into a wastewater pool or recycled; (9) after a valve at the output end of the pre-concentrated solution storage tank is opened, the pre-concentrated solution sequentially passes through a second booster pump, a third cartridge filter and a second high-pressure pump and enters the STRO membrane module; (10) and after further separation and concentration by an STRO membrane module, the concentrated solution enters a concentrated solution storage tank, the produced water enters a permeate storage tank, and the produced water is recycled as the water for the production process.
Further, a cleaning step is carried out after the step (10);
the cleaning step comprises the following steps:
(1) and (3) offline cleaning of the ultrafiltration membrane component: opening a valve at the output end of the permeate storage tank, opening a cleaning pump, and enabling cleaning liquid to enter the ultrafiltration membrane component through a pipeline in sequence; heating the cleaning liquid through a heat exchanger; the cleaning solution circularly flows back to the extraction liquid storage tank;
(2) online cleaning of an ultrafiltration membrane component: when the device normally works, backwashing and gas washing are carried out, a backwashing pump is opened during backwashing, other pumps and valves are closed, so that a valve on a backwashing pipeline is opened, backwashing is carried out by using refined liquid, and permeate liquid returns to an extract liquid storage tank; during air washing, other pumps and valves are closed, and valves on an air pipe of the air compressor and valves on a backwashing pipeline are opened;
(3) offline cleaning of the reverse osmosis membrane module and the STRO membrane module: opening a valve of the cleaning water tank, opening a cleaning pump, and cleaning the reverse osmosis membrane module and the STRO membrane module through the output end of the cleaning pump; cleaning liquid enters the ultrafiltration membrane component through the output end of the cleaning pump, and is heated through the heat exchanger; the cleaning solution circularly flows back to the extraction liquid storage tank; and opening a valve at the output end of the flushing pump to clean the STRO membrane module.
The technical effects of the utility model: the filter and the ultrafiltration membrane component are adopted for purification, the process is simple, and the purification effect is good. The reverse osmosis membrane module and the STRO membrane module are adopted for concentration, the concentration of the extract liquor can be concentrated from 2.0-8.0% to a concentrated solution with the concentration more than 30% at normal temperature, and the concentration multiple is far higher than that of a common reverse osmosis membrane; the system can also effectively remove fine insoluble substances, pectin, lignin, protein and other macromolecular substances with negative influence in the extraction liquid, avoid the loss of thermosensitive substances in the tobacco extraction liquid, retain the aroma components in the tobacco and improve the quality of the reconstituted tobacco; furthermore, the utility model discloses still have area little, the energy consumption is lower, degree of automation is high, the easy advantage of industrialization application.
Drawings
FIG. 1 is a schematic structural view of the reconstituted tobacco extraction liquid membrane separation, purification and concentration system of the present invention;
FIG. 2 is an enlarged view of the upper portion of FIG. 1;
fig. 3 is an enlarged view of the lower half of fig. 1.
Detailed Description
The following further describes the present invention with reference to specific embodiments. The specific embodiments described herein are merely illustrative of the present invention and do not limit the scope of the invention.
Referring to the drawings, P denotes a pressure gauge and F denotes a flow rate meter. The following filters and (new) filters are all shown in the figure. The ultrafiltration membrane device and the ultrafiltration membrane component are ultrafiltration membrane components in the figure; the following reverse osmosis membrane (RO) preconcentration device, reverse osmosis membrane (RO) device and reverse osmosis membrane module are reverse osmosis membrane modules in the figure; the following pipe-network type reverse osmosis membrane (STRO) devices, pipe-network type reverse osmosis membranes (STRO), and STRO membrane modules are STRO membrane modules in the drawings.
The utility model discloses the system adopts (novel) filter and milipore filter subassembly (milipore filter device) to purify, and the flow is simple, purifying effect is better. Concentrating by adopting a reverse osmosis membrane component (reverse osmosis membrane (RO) device) and a STRO membrane component (net type reverse osmosis membrane (STRO) device), wherein the concentration of the extract can be concentrated from 2.0-8.0% to a concentrated solution with the concentration ratio higher than that of a common reverse osmosis membrane at normal temperature; the system can also effectively remove fine insoluble substances, pectin, lignin, protein and other macromolecular substances with negative influence in the extraction liquid, avoid the loss of thermosensitive substances in the tobacco extraction liquid, retain the aroma components in the tobacco and improve the quality of the reconstituted tobacco; furthermore, the utility model discloses still have area little, the energy consumption is lower, degree of automation is high, the easy advantage of industrialization application.
Specifically, the utility model discloses a reconstituted tobacco extraction liquid membrane separation purifies concentrated system, this system is including consecutive extract storage tank, stock solution pump, (novel) filter, first security filter, heat exchanger, milipore filter device, refined liquid storage tank, first booster pump, second security filter, first high-pressure pump, reverse osmosis membrane (RO) device, preconcentration liquid storage tank, second booster pump, third security filter, second high-pressure pump, pipe network formula reverse osmosis membrane (STRO), concentrate storage tank, still include backwash pump, flush pump, air compressor machine washing water tank and scavenging pump. The system adopts a (novel) filter and an ultrafiltration membrane device for purification, and has simple flow and better purification effect. Concentrating by adopting a reverse osmosis membrane (RO) device and a net type reverse osmosis membrane (STRO) device, wherein the concentration of the extract can be concentrated from 2.0-8.0% to a concentrated solution with the concentration of more than 30% at normal temperature, and the concentration multiple is far higher than that of a common reverse osmosis membrane; the system can also effectively remove fine insoluble substances, pectin, lignin, protein and other substances which have negative influence on macromolecules in the extraction liquid, can avoid the loss of thermosensitive substances in the tobacco extraction liquid, retains the aroma components in the tobacco and can reproduce the quality of the tobacco leaves too high; furthermore, the utility model has the advantages of area is little, the energy consumption is lower, degree of automation is high, easily industrialization is used.
Example 1:
the utility model provides a reconstituted tobacco extraction liquid membrane separation purifies concentrated system, this system includes consecutive extract storage tank, stock solution pump, filter, first safety filter, heat exchanger, milipore filter device, refined liquid storage tank, first booster pump, second safety filter ware, first high-pressure pump, reverse osmosis membrane (RO) preconcentration device, preconcentration liquid storage tank, second booster pump, third safety filter ware, second high-pressure pump, pipe network formula reverse osmosis membrane (STRO), concentrate storage tank, still includes backwash pump, flush pump, air compressor machine washing water tank and scavenging pump.
The upper part of the filter is provided with a suspension filter medium, the middle part of the filter consists of a water distribution plate and a polypropylene (PP) inclined pipe, the lower part of the filter is a concentrated solution area, and the filter is provided with a sewage outlet.
The suspension filter medium in the filter is a spherical modified high polymer material, the diameter of the suspension filter medium is 0.5-2mm, the suspension filter medium has a surface microporous structure, and the density of the suspension filter medium is far less than that of water.
The membrane in the ultrafiltration membrane device is one of an organic tubular membrane or a ceramic membrane.
The organic tubular membrane is a graphene modified PVDF membrane element, and the ceramic membrane is a silicon carbide material membrane element.
The reverse osmosis membrane (RO) device uses a wide-flow-channel and anti-pollution Polyamide (PA) roll-type membrane element.
The pipe network type reverse osmosis membrane (STRO) device adopts open-type flow channel, pollution-resistant, high-temperature resistant and high-pressure resistant elements, the high temperature can be resistant to 50-60 ℃, and the pressure resistance can reach 100 bar.
The ultrafiltration membrane device can carry out online backwashing and gas washing through a backwashing pump and an air compressor, and carry out offline chemical cleaning through a cleaning water tank and a cleaning pump.
The pipe network type reverse osmosis membrane (STRO) device can be subjected to online washing and offline chemical washing through a washing water tank and a washing pump.
The utility model discloses reconstituted tobacco extraction liquid membrane separation purifies concentrated system's process flow:
first, passing through a first subsystem: (1) collecting the tobacco stem/tobacco powder extract liquid after soaking and extraction into an extract liquid storage tank; (2) opening a valve at the output end of the extraction liquid storage tank, and conveying the extraction liquid to a filter through a raw liquid pump; (3) the extract liquid filtered by the filter enters a first safety filter again to prevent some mechanical impurities in the extract liquid from entering a subsequent ultrafiltration membrane component; (4) then heating or controlling the temperature through a heat exchanger; (5) then the extract enters an ultrafiltration membrane component for separation and purification to remove macromolecular substances and fine insoluble substances;
and then the second subsystem: (6) the permeate of the ultrafiltration membrane enters a refined liquid storage tank, and the concentrated solution of the ultrafiltration membrane flows back to the extract liquid storage tank; (7) after a valve at the output end of the refined liquid storage tank is opened, the refined liquid enters a reverse osmosis membrane component (namely a reverse osmosis RO membrane concentration device) through a first booster pump, a second security filter and a first high-pressure pump in sequence; (8) after separation and concentration are carried out through a reverse osmosis membrane component, the pre-concentrated solution enters a pre-concentrated solution storage tank, produced water can be discharged into a wastewater pool or recycled, and refined solution is concentrated to a certain concentration by controlling the recovery rate; (9) after a valve at the output end of the pre-concentrated solution storage tank is opened, the pre-concentrated solution sequentially passes through a second booster pump, a third cartridge filter and a second high-pressure pump and enters an STRO membrane module (namely a STRO membrane concentration device); (10) after further separation and concentration by the STRO membrane module, the concentrated solution enters a concentrated solution storage tank, the produced water enters a permeate storage tank, the produced water can be recycled as water for the production process, and the pre-concentrated solution is concentrated to a certain concentration by controlling the recovery rate.
The cleaning process after the process flow of the reconstituted tobacco extraction liquid membrane separation, purification and concentration system is as follows:
(1) and (3) offline cleaning of the ultrafiltration membrane component: opening a valve at the output end of the permeate storage tank, opening a cleaning pump, and enabling cleaning liquid to enter the ultrafiltration membrane component through a pipeline in sequence; the cleaning liquid is heated through the heat exchanger, so that the cleaning effect is improved; the cleaning liquid circularly flows back to the extract liquid storage tank (the cleaning tank), and the circulation and soaking time can be controlled during cleaning. And finally discharging the cleaning liquid to a wastewater pool for treatment.
(2) Online cleaning of an ultrafiltration membrane component: when the device normally works, backwashing and air washing can be periodically carried out, a backwashing pump is opened during backwashing, other pumps and valves are closed, so that the valve on a backwashing pipeline is opened, backwashing is carried out by using refined liquid, and the permeate liquid returns to an extract liquid storage tank; and during air washing, other pumps and valves are closed, so that the valves on the air pipe of the air compressor and the valves on the backwashing pipeline are opened. Normally, the operation is carried out for 30-45 minutes, and the backwashing and air washing time is 30-60 seconds.
(3) And (3) offline cleaning of the reverse osmosis membrane module and the STRO membrane module (namely offline cleaning of the RO and the STRO modules): and a valve of the cleaning water tank is opened, and the cleaning pump is opened, so that the reverse osmosis membrane module and the STRO membrane module can be cleaned through the output end of the cleaning pump. Cleaning liquid enters the ultrafiltration membrane component through the output end of the cleaning pump, and is heated through the heat exchanger, so that the cleaning effect is improved; the cleaning liquid circularly flows back to the extract liquid storage tank (the cleaning tank), and the circulation and soaking time can be controlled during cleaning. And finally discharging the cleaning liquid to a wastewater pool for treatment.
And the output end of the permeate liquid storage tank is provided with a flushing pump, the output end of the flushing pump is communicated with the STRO membrane module, and a valve at the output end of the flushing pump is opened to clean the STRO membrane module.
The above description is only a specific embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the principle of the present invention, a plurality of modifications or equivalent replacements may be performed on the technical solution of the present invention, and these should also be considered as belonging to the protection scope of the present invention.
Claims (8)
1. The utility model provides a reconstituted tobacco extraction liquid membrane separation purifies concentrated system which characterized in that: comprises a first subsystem and a second subsystem which are connected in sequence;
the first subsystem comprises an extract liquid storage tank, a stock solution pump, a filter, a first safety filter, a heat exchanger and an ultrafiltration membrane component which are connected in sequence;
the second subsystem comprises a refined liquid storage tank, a first booster pump, a second security filter, a first high-pressure pump, a reverse osmosis membrane module and a pre-concentrated liquid storage tank which are connected in sequence, the second booster pump, a third security filter, a second high-pressure pump and a STRO membrane module are connected in sequence, and the output end of the STRO membrane module is respectively connected with the concentrated liquid storage tank and the permeate liquid storage tank;
the output end of the ultrafiltration membrane component is connected with the input end of the refined liquid storage tank, and the output end of the ultrafiltration membrane component is provided with a return pipe connected with the extract liquid storage tank.
2. The reconstituted tobacco extract liquid membrane separation, purification and concentration system according to claim 1, characterized in that: the system also comprises a cleaning water tank and a cleaning pump; a backwash pump; a washing pump and an air compressor; the input end of the cleaning water tank is respectively communicated with the output ends of the ultrafiltration membrane module, the reverse osmosis membrane module and the STRO membrane module, the cleaning pump is arranged at the output end of the cleaning water tank, and the output end of the cleaning pump is respectively communicated with the input ends of the ultrafiltration membrane module, the reverse osmosis membrane module and the STRO membrane module; the backwashing pump is arranged at the output end of the refined liquid storage tank and connected with the input end of the extract liquid storage tank, and a backwashing pipeline of the backwashing pump is communicated with the ultrafiltration membrane component of the first subsystem; the flushing pump is arranged at the output end of the permeate liquid storage tank, and the output end of the flushing pump is communicated with the STRO membrane module; the air compressor is communicated with the ultrafiltration membrane component of the first subsystem.
3. The reconstituted tobacco extract liquid membrane separation, purification and concentration system according to claim 1 or 2, characterized in that: the upper part of the filter is provided with a suspension filter medium; the middle part consists of a water distribution plate and a polypropylene (PP) inclined pipe; the lower part is a concentrated solution area, and a sewage outlet is arranged on the filter.
4. The reconstituted tobacco extract liquid membrane separation, purification and concentration system according to claim 3, characterized in that: the suspension filter medium in the filter is a spherical modified high polymer material with the diameter of 0.5-2mm and a surface microporous structure.
5. The reconstituted tobacco extract liquid membrane separation, purification and concentration system according to claim 1 or 2, characterized in that: the ultrafiltration membrane in the ultrafiltration membrane component is one of an organic tubular membrane or a ceramic membrane; the reverse osmosis membrane module uses a Polyamide (PA) spiral membrane element.
6. The reconstituted tobacco extract liquid membrane separation, purification and concentration system according to claim 5, characterized in that: the organic tubular membrane is a graphene modified PVDF membrane element, and the ceramic membrane is a silicon carbide material membrane element.
7. The reconstituted tobacco extract liquid membrane separation, purification and concentration system according to claim 1 or 2, characterized in that: the system also comprises a control cabinet, wherein the control cabinet is arranged in the first subsystem to control the opening and closing of all the pumps of the system and the valves on the pipelines.
8. The reconstituted tobacco extract liquid membrane separation, purification and concentration system according to claim 1 or 2, characterized in that: the ultrafiltration membrane component is provided with a sampling valve; a sampling valve is arranged on the reverse osmosis membrane component; a sampling valve is arranged on the preconcentrate storage tank; a sampling valve is arranged on the STRO membrane component; a sampling valve is arranged on the concentrated solution storage tank; the permeate storage tank is provided with a sampling valve.
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| CN110314548A (en) * | 2019-07-17 | 2019-10-11 | 安徽科博瑞环境科技有限公司 | Reconstituted tobacco extracts liquid film separation purification concentration systems and its treatment process |
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| CN110314548A (en) * | 2019-07-17 | 2019-10-11 | 安徽科博瑞环境科技有限公司 | Reconstituted tobacco extracts liquid film separation purification concentration systems and its treatment process |
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