JP6854770B2 - Recycling method and related equipment by separating components such as aluminum pack, aluminum plastic laminate, aluminum carton, etc. - Google Patents

Description

Detailed description of the invention

This patent specifically relates to a method for regenerating components by separating and recovering the main components of waste such as aluminum packs, aluminum plastic laminates, and cartons, and applicable equipment. In addition to aiming to avoid environmental pollution, recycling of plastics, aluminum and paper, extraction of reusable polymers, recycling of aluminum cans and aluminum waste, melting and purification using conventional methods, or them The advantage of being able to be used in the production of aluminum raw materials such as chlorine, organic aluminum, and aluminum pigments is taken up. It should be noted that low cost and easily available solvents are used, low power consumption, use of cellulose pulp to manufacture carton paper and corrugated cardboard boxes, or as a material for mechanical pulp, or to bleach (bleached) pulp, and low process costs. And the advantages of investment and best cost / benefit can also be stated.

As is well known by experts in waste recycling technology, the most commonly used is cellulose from the treatment of waste (especially containers and packaging) such as cartons, plastic laminates and aluminum packs. In pulp production, it goes to the final paper industry. However, the aluminum polymer removed in this process is basically mixed and crushed, and later applied to various product processes such as cleaning broom handles and thermocompression bonding materials for roof tiles. Therefore, it can be said that expensive aluminum cannot be fully utilized unless the aluminum component is surely isolated. There is also a liquid or gas fuel production method for power generation using pyrolysis technology, but since pyrolysis is an endothermic process, a large amount of energy from waste combustion is required to produce fuel.

What is important here is that in the case of paper / aluminum polymer laminating, the polymer component is mostly composed of polymer, which has the characteristics of a softening point of 125 ° C and a pour point of 190 ° C, and is a low-density polymer aluminum. It means that a compatibilizer that promotes adhesion is used. Normally, functionalized polyolefin is used as a polymer of ethylene, acrylic acid, and methacrylic acid, and this compound is compatible with thermoplastic materials such as polypropylene, polyethylene terephthalate (PET), and polyamides such as nylon (registered trademark). It improves the solubility and leads to the reuse of reducing materials.

As a result of searching the domestic and international patent databanks, the following were searched:
Spanish Patent PI 2383208 “Recycling method for composites containing aluminum” introduces cellulose recovery technology by mechanical shearing such as container packaging. The waste from this process is directed to aluminum recovery.

However, in this method, polyethylene molecules are destroyed and later sent to paraffin or gas production. The plasma processing process performed at a high heat of 15000 ° C requires an inert environment, consumes a large amount of energy in addition to polymer loss, and is an overall high-cost process.

Many patents have introduced techniques for recovering plastics from carton packaging using solubilizers: tetrahydrofuran, xylene, toluene according to Brazilian Patent PI 0202303-2 “Separation method for multilayer films used in containers and packaging”. 4 Various solvents such as carbon tetrachloride, organic acids, water, acetone and chloroform are used. According to Chinese Patent CN 1554691 "Separation method from aluminum-plated plastic packaging waste to aluminum sheet and plastic film", tetralin, tetrahydrofuran solvent, and glacial acetic acid, which is the base of aluminum chloride, are mentioned. Korean Patent KR 20010016352 describes a technique for causing an aluminum reaction by combining an alcohol component such as methanol, ethanol, propanol and butanol with a salt component (mercury chloride, calcium, aluminum, magnesium, potassium or hydrochloric acid).

In many cases, all of these methods utilize highly toxic or carcinogenic solvents and reagents, and there is a high possibility that the polymer or the compound polymer that reacts with aluminum will be decomposed. When this phenomenon occurs, chlorination increases reagent consumption and complete aluminum metal recovery is not possible.

There are other patents that introduce a separation method different from the above. Brazilian patent PI0006641-9 “Surfactant used for aluminum purification and separation in plastic recycling” is an example. A surfactant and formic acid are used at 85 ° C to 198 ° C to carry out the polymer film gradual removal. However, if an acid is used based on the above conditions, some aluminum residues will also be removed.

Another patent also mentions a method of removing aluminum using strong acids and strong bases:
Brazilian patent PI 0706115-3 “Regeneration of multi-layer packaging” states that sodium hydroxide is used as a solvent, similar to US patent US 5127958 “Metal layer removal step of polymer substrate”.

As Chinese Patent CN 102532592 “Aluminum / Plastic Separator and Its Preparation Method” shows a mixture of 5-50% acid and 25-50% unspecified organic solvent, Japanese Patent JP 20040327047 shows glycol. Polymer separation by density difference using solution is disclosed. However, all of them cause etching of aluminum by using sodium hydroxide.

What should be noted in these steps is the increase in process cost due to the use of acids and bases, and at the same time the removal of aluminum parts or the whole. Ultimately, it causes economic loss and is accompanied by the fact that it reduces the added value of the product.

Considering US Pat. No. 7,598,297 describes the use of generally usable solvents and strong bases such as sodium hydroxide and potassium. Similarly, the applicable process temperature is described in a wide range, but the use of xylene is the only condition at any temperature. This is a method for separating and removing various polymers generated in containers and packaging at different temperatures in that state. However, in this case as well, aluminum etching with a strong base occurs.

European Patent EP 0568791 aims at process exclusivity over a wide temperature range of 40-500 ° C with the use of solvents for oil derivatives (aliphatic, aromatic, naphthene), halogen compounds and mixtures with them. However, in the component separation process of a mixture of paper, aluminum, and polymer, the solvent consumption rate will be considerably high in order to carry out the process under the wide range of conditions as it is now. One of the applied methods taken up in this step is conduction of a solution containing various polymers dissolved in various solvents. The thermal decomposition process under the conditions of 650 to 1200 ° C and 0,1-0,3 Mpa.

As a result of this technical process research, the following issues have been extracted, and the process to be disclosed this time is based on those measures.

1. Many of the current processes allow only partial recovery of components and do not provide optimal added value. The present invention ensures total recovery of reusable components.

2. Some processes have the disadvantage that they consume a lot of energy during the melting of aluminum and polymer and the polymer itself is also decomposed. The present invention uses a technique for separating polymers with a solvent.

3. According to the process, separation of polymer and aluminum requires complicated and labor-intensive work. In the case of the present invention, since the separation uses only a solvent, it is characterized by low investment and low cost of raw materials.

4. Hazardous solvents are used in some processes, and the separation and recycling of their components is a challenge. In the present invention, only a low-cost, easy-to-obtain, harmless solvent is used, and complete regeneration is achieved with low energy consumption.

As a result of this technical process research, the following drawbacks, disadvantages, and limitations were extracted:
a) Many of the current processes allow only partial recovery of components and do not provide optimal added value.

b) Many of the current processes use a variety of materials to recover the polymer attached to the aluminum. These materials are non-reusable consumables in the process and reduce the added value of the product.

c) According to the process, the separation of aluminum and polymer is not carried out, and the high value-added isolated aluminum component is finally applied as a mixed compound.

d) Many processes use a treatment method that separates aluminum but requires excessive energy consumption, and cracking of the polymer occurs due to the process of flowing under high temperature conditions. This material is used as a filler in the production of waxes and volatiles, which have lower added value than the raw polymer. The above process requires a controlled inert environment, and has the disadvantage of increasing process costs.

e) Use of expensive harmful solvents.

f) Large process costs and investment
g) High cost / benefit.

"Recycling method and related equipment by separating components such as aluminum pack, aluminum plastic laminate, aluminum carton" was developed for the purpose of overcoming the drawbacks, disadvantages and limitations of the conventional process, and mainly uses the polymer dissolution method using a solvent. The purpose is to extract and separate the components, recycle the components of waste, avoid environmental pollution, and recycle plastic, aluminum, and paper.

The process according to this patent has the following advantages over the current process:
a) The developed method can obtain a polymer that can be reused in the production of products and films. The recovered polymer can be used as it is in the original form obtained in the process, or can be blended with a virgin polymer or a heterogeneous recovered polymer, and a filler / colorant or various blending agents can be added.

b) The isolated aluminum is melted and refined by the conventional method applied to aluminum cans and aluminum scrap, and used as a raw material for manufacturing aluminum alloys, plates, inorganic compounds such as sodium and aluminate, and organic derivatives such as alkylaluminum. Can be used.

c) The present invention uses a solvent that is easily and inexpensively available because it is a petroleum distilled rather than a synthetic compound.

d) Since it is not blended with other products that use petroleum distillation in a narrow boiling point range as a solvent, this solvent is completely recovered at the end of the process and returned to the beginning of the process. Distillation here is carried out with simple equipment that does not require a fractional distiller at all.

e) Solvent characteristics: Low boiling point, low specific heat, low evaporation enthalpy, which mainly affects energy consumption. This is because almost all solvents except a small part of distillation are reused using a filter without going through a distiller.

f) The process of the invention recovers the polymer while preserving its physical and scientific properties, including the compatibilizer, allowing advantageous applications such as blending the recovered polymer residue with other thermoplastic formulations. is there.

g) Cellulose pulp can be reused in the production of carton paper for corrugated boxes and used as a filler in mechanical pulp or for bleaching processes;
h) Low process cost, low investment cost
i) Low cost benefit The process of the present invention is the knowledge and experience gained by the inventor's past research and development of paraffin compound blocks and polymer-applied radiation barriers (moderators), and the subsequent development of emulsion explosive compositions. It is based on.

The research is to recycle aluminum-plated packaging waste based on the purpose of recovering polymer / aluminum waste polymer in the process of mechanically recovering used paper pulp from aluminum-plated packaging scrap using hydrapulper. Started to meet the need.

Initially, the purpose was to produce aluminum salt for wastewater treatment by removing aluminum by melting and chemical erosion. At the same time, process adjustment was carried out so that aluminum chloride, sulfate and aluminate could be obtained. Polymers generated in the acid or base process were planned to be reused after washing. However, after calculating the price of sodium-based components and considering the flexible use of metallic aluminum (moderator), it was decided to consider the possibility of removing aluminum without oxidizing it.

Utilizing our knowledge of similarity and structure with solid paraffin in the study of polymer properties, polymer solubility tests using solid paraffin were conducted in the following order:
After putting 100 g of solid paraffin in a beaker and raising the temperature to 100 ° C. for fusion, 20 g of a film containing aluminum / polymer was put in and the temperature was raised to about 125 ° C. After stirring with a glass rod for 5 minutes, the entire liquid was poured into another Becker. At this time, molten paraffin was passed through a metal mesh and poured into a container. The contents accumulated on the mesh were washed with cold carbon tetrachloride. It was confirmed on the premise that this component solubilizes cooled paraffin but the polymer is solubilized only when it is heated. As a result, paraffin removed the polymer adhering to aluminum. A tear test of the membrane demonstrated fracture without stretching. It is a film that has different characteristics from that of a composite plastic film.

Another demonstration was that the resulting paraffin-polymer compound solidified at lower temperatures than with paraffin alone.

As a result, we examined a construction method that can separate polymer and paraffin. Since it has a high molecular weight, it is a difficult problem to solve because distillation or fractional solubilization is not applied. First, I tried the direct use of carbon tetrachloride, but rejected it because of its high value and highly harmful component characteristics.

He then proceeded with research on other chlorine uses, all of which were found to have similar problems.

In the next step, studies were carried out using aromatic solvents, chlorinated and non-chlorinated, naphthenic. We also experimented with alcohol esters, Amiru acetate, methyl, and butyl.

In parallel, aluminum removal was tested on polypropylene, PET, and PVC laminated in packaging for chemical blisters, powdered juices, candies, and potato chips. The experimental results of all products were achieved by the solvent used in the experiment. Some solvents have been tested to stricter standards than others, taking into account health hazards and costs.

Since the priority item is aluminum carton packaging, the experiment using other types of waste was temporarily suspended at this point.

Considering the difficulty of separation when using paraffin, next, I tried paraffin-based kerosene, which has a structure similar to that of solid paraffin. Under the same mass ratio condition, dissolution was less than 5 minutes and passed. However, a new problem arose: a method of completely removing the solvent from the polymer. Since a small amount of high molecular weight paraffin compound remained in the composition of the solvent, it was confirmed that it was necessary to heat the polymer at a high temperature in order to effectively remove the residual component. However, considering the molecular chain lengths of kerosene and paraffin, the interaction is high under that condition and separation becomes difficult.

Therefore, sedimentation separation was attempted. The polymer / kerosene becomes a paste after cooling. The paste was added to the same amount of ethanol, stirred, filtered, and washed with ethanol several times. After the drying treatment, the desired precipitated polymer was obtained.

The used mixed solvent was distilled to separate kerosene and ethanol. As a result, it was noticed that it was difficult to completely remove the residual kerosene from the precipitated polymer by distillation, and next, a solvent having similar characteristics to kerosene but having a low boiling point was investigated.

First, a commercially available hexane was used. Since it is a highly volatile solvent, a flask was attached to a reflux condenser to dissolve it, and an elution test was conducted with the same amount of solvent remaining. As a result, dissolution occurred within 5 minutes.

In another test, petroleum ether was subjected to a distillation range of 60 ° C., but it was confirmed that dissolution did not occur because the temperature was lower than that of commercially available hexane.

Considering the results so far, the same amount of solvent / residue was then placed in a steel tank with a lid and heated with hot water (hot water bath). When it reached boiling point, the tank was removed and allowed to cool naturally. When the tank lid was opened and the contents were checked, a small amount of residual heat remained, but most of the solvent was vaporized, and the polymer was sponge-like. I tried to restore the experiment. This time, the solvent was gradually removed as the dissolution occurred under pressure while controlling the softening temperature of the polymer. During the operation, the melting tank was always controlled at a constant pressure and temperature. After the removal was completed, the mixture was cooled to obtain a solid polymer.

As a result of repeating the above experiments, it can be said that the most suitable solvent for polymer isolation and separation from aluminum carton and aluminum plastic laminated packaging is low boiling point and medium boiling point alkanes. The reason is their low molecular weight, which allows good intermolecular interaction with the large molecular chain length of the polymer and is easy to dissolve. Since the structure of the solvent is linear like the polymer, the intermolecular interaction is good, and the van der Waals bond is only broken.

The reason for deciding to use ordinary paraffinic hydrocarbons (straight-chain alkanes) is that they are less harmful than air fresheners and naphthenes and reduce the risk of polymer decomposition (due to their structural similarity), so they are easy to vaporize and distill. is there.

Previous experiments have demonstrated the availability of paraffinic hydrocarbon solvents at boiling points below 120 ° C (preferably 60 ° C to 100 ° C). The polymer melting temperature is lower than about 190 ° C. and the softening temperature is about 105 ° C., so no high pressure needs to be applied. The easy dissolution characteristics and the flexibility of elimination at the time of returning to atmospheric pressure lead to improvement in the quality of the recovered polymer. In order to keep the melting temperature within a certain range, the optimum temperature (polymer softening temperature) was always controlled by increasing the pressure when the temperature became lower than the polymer softening temperature, and the experiment was advanced.

Regarding solvent separation, since its boiling point is lower than the softening temperature of the polymer, part of the solvent will vaporize when it is flowed from the dissolution tank to the outside of the tank, but before removing aluminum, dilute it with a distilled solvent and wash the aluminum. went. The recovery mechanism of the solvent itself was optimized, such as reusing this solvent as the first solvent in the next experimental lot.

The solution containing the polymer is flowed to the next step after the partial concentration due to partial vaporization of the solvent is confirmed. It should be noted that all the solvent vapor is returned to the distiller.

The filter method was examined as the final stage of the experiment. The pressure range of ultrafiltration (emulsion, bacteria, macromolecules and fats and oils) is 1 to 10 bar, and the pore size of the ultrafiltration membrane is 0.001 to 0.1 μm. Given that the average molecular weight of the polymer was 20000 Da, limit filtration seemed to be a promising method. There is great potential for rationalization of energy consumption, and the gas emitted from the boiler at around 250 ° C can be applied to distillation columns, conveyors, and polymer drying processes. Furthermore, when aluminum is melted, after cooling the ingot, the initial temperature of the heat exchanger is 650 ° C and the final temperature is about 125 ° C, so there is a possibility that energy can be used appropriately.

First, when the liquid containing 11% of the polymer dissolved on the ceramic perforated plate was pressure-filtered using a paper filter, the solvent was transferred to the capillary and a more concentrated solid polymer remained on the filter.

In another experiment, after the solution was naturally cooled, it was poured into a paper filter and light pressure was applied proactively using a syringe-shaped device, and the solvent could be separated immediately. Most of the solvent could be removed by wrapping the cake with paper and pressing it on a press. Therefore, it was demonstrated that by filtering the heat solution in this way and then compressing the cake filtration, the separation process can be efficiently improved, leading to energy saving. Even when a paper filter is used, the cake filtration can be easily peeled off, so that the final drying process can be carried out without prior cleaning and the solvent can be completely removed.

Furthermore, the minimum time for polymer dissolution was investigated from the aluminum film in the Tetra Pack® container. Cellulose was removed in advance, and the residue aluminum film fragments of about 30 mm x 30 mm were dipped into kerosene one by one with tweezers while keeping the oil at a constant temperature of 100 ° C. After light agitation, I tried removing each aluminum film with different soaking times: from 2 seconds to 20 seconds every 2 seconds. Aluminum film fragments taken from kerosene heated to 100 ° C. were immediately transferred to a beaker containing cold petroleum ether for cleaning and treatment of solution residues. The aluminum film was torn and tested to confirm the effect of the melting process. Although the aluminum film was cracked, it remained stretched while still adhering to the polymer film. As a result of the experiment, even the fragments immersed in the solvent for 2 seconds were in a cracked state and the polymer could be removed. Therefore, it can be said that the time required for polymer solubilization is extremely short. Since the area and thinness of the film are directly related, it is desirable to increase the immersion time a little more to ensure the polymer removal. Then, even when the film layers overlap as in the bonded portion of the container, dissolution can be ensured. It is also desirable to omit the cap at the stage of disassembling this type of container. This is because the heating time becomes extremely long with a cap. If it is not possible to remove the cap, it is necessary to mechanically remove the aluminum / polymer film and the cap using a strainer or a mesh net. Stirring is also an important step, such as promoting the diffusion of the solvent and facilitating the decomposition of the residue.

The present invention introduces the following innovative techniques.

1. Polymer dissolution using a low molecular weight, low boiling point and medium boiling point alkane-based (boiling point 60 ° C to 120 ° C), especially paraffinic hydrocarbon with a boiling point of 100 ° C or less as a solvent. It is possible to use kerosene as an application example of this new construction method, but in that case, operate within 105 ° C. The temperature is lower than the boiling point and flash point of kerosene, and low flammability is an advantage. Next, residual kerosene is removed using a low boiling point hydrocarbon. Hydrocarbons have good intermolecular interaction with the large molecular chain length of the polymer and are easy to dissolve. Since the structure of the solvent is linear like the polymer, the intermolecular interaction is good, and the van der Waals bond is only broken. One of the advantages of the new method is the easy removal and recovery of the solvent at atmospheric pressure.

2. The polymer melting temperature is about 190 ° C and the softening temperature is about 125 ° C, so there is no need to apply high pressure. One of the advantages of the new method is the easy removal and recovery of the solvent at atmospheric pressure.

3. Polymer / aluminum separation method using polymer dissolution by solvent recirculation. Retention time Ensuring polymer concentration.

4. Method of separating polymer and solvent using a solution containing concentrated polymer. After separation, ensure reusable quality polymers and in-process reproducible solvents.

5. As a method for removing the solvent residue from aluminum, use a low boiling hydrocarbon (preferably a hydrocarbon distillate having a commercially available hexane distillation range) or a cleaning solvent such as petroleum ether or ethanol 96GL to remove the solvent residue after dissolving the aluminum. How to remove.

6. Reduced melting time. Since continuous operation is possible, the area of the melting tank can be reduced. For melting, it is conceivable to install equipment such as solvent immersion using a screw feeder and a conveyor, combination with a pump and a filter, and cooling. In the case of ultrafiltration, improvement of equipment structure such as mounting a filter on the surface of the extruder and process combination that allows continuous operation or batch operation.

7. Process optimization related to energy consumption: As you can see from the recovery flow in the process, separation of pulp and paper, polymer and aluminum, heat recovery at each stage in the process (for example, reuse of gas generated in the process: The vaporized cleaning solvent gas of about 250 ° C. discharged from the boiler is returned to the tower or the polymer drying conveyor). In the aluminum melting process, the heat gas generated by cooling the ingot in a dedicated chamber is recovered and used for solvent heating, or the drying step before the solubilization process after removing cellulose, the drying step of the spray polymer after washing, etc. Can be applied to. The initial temperature is 650 ° C and the final temperature is in the range of 105 ° C, and the above applications are feasible.

8. If necessary, it is also possible to separate the solvent from the polymer using distillation, depending on the application. In that case, the solubilized polymer residue adhering to the aluminum can be removed by diluting a new (distilled) solvent before removing the aluminum from the melting tank by lot operation. The used solvent is recovered and reused as the first solvent in the next lot, which leads not only to effective utilization of the solvent itself but also to more efficient recovery of the polymer.

9. No re-dissolution required for high quality polymer recovery. Reduced processing time.

10. Polymer film can be formed. The resulting film, which is fluidized into a steam-heated cylinder roll in parallel with solvent recovery, can be used without pulverization.

11. The polymer can be isolated by injecting a concentrated solution through a spray dryer chamber and using a rotary disc.

12. Recoverable polymer precipitated with a second solvent.

The following is a list of reference diagrams for explaining the contents of this patent:

FIG. 6 is a continuous production process flow chart of a reuse method by component distribution of aluminum pack, aluminum plastic laminate and carton according to this patent. The batch production process flow chart of the reuse method by the component fraction of the aluminum pack, the aluminum plastic laminate and the carton which concerns on this patent. Schematic diagram showing three track positions of a special device for aluminum. Step A process according to this patent: Block diagram of the process and equipment showing the cellulose separation method of the carton aluminum pack. Step B step according to the present patent: Block diagram of a step and desirable equipment showing the separation and isolation of the polymer composition and aluminum, which are abundant in the aluminum / polymer compounded portion. Step B.a step according to this patent: Step 1 and equipment block diagram showing the separation and isolation of the polymer composition and aluminum, which are abundant in the aluminum / polymer compounding part. Step B.b step according to this patent: Step 2 and equipment block diagram showing the separation and isolation of the polymer composition and aluminum, which are abundant in the aluminum / polymer compounding part. B.d step step according to this patent: A block of steps and equipment representing polymer separation from a concentrated solution containing a polymer. B. Step process in general according to this patent: Block diagram of all process plans and equipment showing the separation and isolation of the polymer composition and aluminum, which are abundant in the aluminum / polymer compounding part. C.1: Step 1: Polymer extraction method by precipitation and drying.

[Detailed description of the invention]
For a better understanding of the process, the following identifications are defined and applied for the process flow and related equipment:
A01 --Film feeder
B01-Intermittent supply device
B01A --Continuous supply device
B02 --Suspension tank
C01 --Dissolving tank
D01 --Special mesh filter
E01 --Polymer Residual Cleaner
F01 --Concentrate tank
F02 --Diluter tank
G10 --Aluminum special outlet
G11-Piston
G11A-Cavity
G12 --Jacket
G12A-Upper mouth
G12B-Lower mouth
H01 --Polymer dryer
I01 --Paste filter
J01 --Solvent vapor condenser
K01 --Aluminum dryer
L01 --Concentrate cooler
LM01 --Heat recovery repair device
M01 --Solvent heater
N01 --Concentrated solution supply device
N02 --Recovery solvent supply device
N03 --Concentrated solution supply device
N04 --Solvent supply device
O01 --Kerosene tank
P01 --Aluminum crusher
Q01 --Flotation tank
R01 --Net basket
S01 --Press machine
T01 --Recirculation pump
U01 --Check valve
U02 --Check valve
V01 --Return pump
X01 --Solvent tank
Y01 --Drain filter
Z01 --Cleaning solvent supply pump
Z02 --Concentrate pump
Z03 --Solvent pump
ECAP-Carton, Aluminum, Plastic Pack, Aluminum Pack
RME-Mechanical Shredder
RTS-Dirty Fragment
TLR-Shards cleaning tank
CP-Perforated basket
FRS-Sewage removal filter unit
SRF --Residual filth of filter unit
ARE --Reclaimed water
RTL-clean scraps
DHP-Hidrapulper Crusher
CCF-Fixed Cylinder Filter
RPA-Polymer / Aluminum-rich Polymer Composition Residues
PC-Cellulose pulp
TTR-Inclined rotating net drum
HC-Liquid Cyclone
TET-Conveyor Net Conveyor
AFIC --Cellulose-removed filtered water
SEC-Dryer
CES-Dried Cellulose
MP-Paper machine
FPA-Paper
BR-Bleach device
CEB-Bleached Cellulose
SOLV-Recovery solvent
CAI-Inclined rail
CTL-Net type conveyor belt conveyor
FSPC-Concentrated Polymer Solution Filter
BSPC-Concentrated Polymer Solution Pump
SPC-Concentrated polymer solution
SPD-Concentrated polymer diluent
FAIP-Polymer and solvent impregnated aluminum sheet
CAV-Vacuum chamber
FAIS-Solvent impregnated aluminum sheet
SL-Cleaning solvent
SEI-Lower drying device
COS-Solvent Condenser
FA-Aluminum sheet
SOLVQ-Recovery thermal solvent
SU-Ultrafiltration Separator
PFP-paste polymer
FPL-Cleaning Filter Press
MDS-Solvent mixing
PPU-wet polymer powder
DSS-Simple solvent distiller
SEPO-Polymer dryer
SLR-Recovery cleaning solvent
PPS-Dry polymer powder
CTL-Net type conveyor belt conveyor
DSPC-Solution filter
BSPC-Solution re-reduction pump
EH-Hildebrand extractor
RSTC-Solution Cooling Heat Exchanger
FFP-Press filter
AQS-Solvent heater
PFP-paste polymer
TQD-Dissolution tank
CR --Reflux cooler
TSF-heat siphon
TS-Solvent tank
FL-Hollow fiber filter
TCS-Solvent Concentration Tank
TSD-Diluting tank
TES-Solution storage tank
SV-Vacuum system
NPP-Nitrogen for purging
FIA-Aluminum film
CRS-Reflux cooler
SR-Preparation solution
VAS-Saturated vapor
CD1 --Condenser 1
CD2-Condenser 2
VA-Steam
TPP-Settling tank
FIL-Polymer filter
TA --Water tank
PPS-Dry Precipitated Polymer
TDE-Sinking Tower
COND-Condenser
DESA-Ethanol Distiller
DESH-Solvent Distiller
AER --We examined the improvement of the recovered ethanol process and the introduction of more appropriate and efficient equipment. As a result of research and research, process optimization projects are described below:
A method for separating components of an aluminum or plastic or carton laminated container that separates aluminum from a plastic film of polyethylene or polypropylene by polymer solubilization using a compatible solvent. The solubilization process involves pressurizing the material below the softening temperature of the polymer, then separating the solvent from the polymer by using a non-solvent dilution of the polymer that is reciprocal other than the main solvent or by lowering the temperature, and finally the solvent of that solvent. Filter and return to solubilization stage for reuse. The procedure for running this cycle continuously is as follows:
A) The film or similar pieces are put into the film feeder (A01) in lot units. The material passes through the check valve (U02) of the continuous feeder (B01A) after the check valve (U01) installed in the lot feeder (B01).

B) Send the set amount of film fragments from the intermittent supply device (B01) to the continuous supply device (B01) with the check valve (U02) open with the check valve (U01) closed; (U01) is opened and material is charged into the intermittent supply device (B01); continuous operation.

C) The film is fed into the continuous supply device (B01A) by the screw transfer device. At the same time, the check valve (U02) is closed and the solvent is continuously charged into the suspension tank (B02) using the cleaning solvent supply pump (Z01). The solvent to film amount ratio is 8 to 15: 1 and the film is completely immersed in the solvent in the suspension tank (B02). Suspension of polymer / aluminum is performed as described above.

D) The suspension is transferred to a melting tank (C01) and agitated by joint heating at 100 ° C to 105 ° C over a long circulation path by an internal helical pitch shaped rotating device. Convection is improved by maintaining a residence time of 2-5 seconds.

E) The suspended polymer and aluminum suspended fluid is sent to a special mesh filter (D01) with a helicoid threaded moving guide. In this way, aluminum is separated from the concentrated solution.

F) Dissolution tank (C01) The concentrated liquid flowing from the mesh holes is sent to the concentrated liquid tank (F01) while applying a counterpressure to the fluid so as to maintain the pressure. The residual aluminum is flowed to the next process (polymer residual washer (E01)) by the guide of the special mesh filter (D01). The substance does not move on the surface from the front and back of the pipe connecting the two processes of this equipment, and from here the aluminum is flowed to the dedicated outlet (G01) while changing the speed depending on the case. ;
G) The filtered and condensed solvent sent from the solvent tank (X01) by the helicoid screw type moving guide is injected into the polymer residual cleaning machine (E01), and the polymer remaining on the aluminum is removed in the cleaning tank (E01). The diluent is recovered and returned to the diluent tank (F02) while applying a counterpressure to the fluid so as to maintain the pressure in the dissolution tank (C01).

H) The recovered concentrate is returned to the concentrate tank (F01) and continuously cooled to 50 to 70 ° C using the concentrate pump (Z02). For this cooling, first, the heat recovery repair machine (LM01) is used to slowly heat the filter with a condensing solvent, and then the condensate cooler (L01) is used to completely cool the material. At this stage, polymer precipitation and insolubilization occur. Next, it is sent to the paste filter (I01), and the filtered solvent is accumulated in the solvent tank (X01) together with the solvent recovered from the solvent steam condenser (J01), and again the heat recovery repair machine (LM01) and the solvent. It is returned in the order of the helicoid screw type movement guide of the pump (Z03), the solvent heater (M01) and the polymer residual washer (E01).

I) The diluent discharged from the polymer residual washer (E01) for cleaning aluminum is returned to the diluent tank (F02), and is continuously returned to the start of the process by the cleaning solvent supply pump (Z01).

J) The filtered cake flows to the polymer dryer (H01) and the solvent vapor is sent to the solvent vapor condenser (J01). The condensing solvent is accumulated with the condensing solvent from the aluminum dryer (K01).

L) All of the solvent vapor is condensed and then sent to the solvent tank (X01) for reuse in aluminum cleaning and returned to the process.

M) Aluminum is intermittently extracted from the aluminum extraction special device (G1O). The extraction port is designed to rotate and open and close intermittently, and its position can be adjusted vertically. This mechanism stabilizes the internal pressure of the melting tank (C01). The polymer-removed aluminum is sent to the dryer (K01), the solvent vapor is separated and sent to the solvent vapor condenser (J01), where it is stored together with the vapor sent from the polymer dryer (H01).

O) Dry aluminum material containing a small amount of cellulose fiber, cap fragments, propylene tape, etc. is put into an aluminum crusher (P01) in lot size. Shear crushing is performed by adding normal temperature kerosene. Residual polymer and cellulose fibers are removed.

P) Stop stirring, transfer the suspended aluminum to the flotation tank (Q01), and spray it with air using the device installed at the bottom of the crusher (P01).

Q) This foam is always removed by draining the supernatant. The foam goes through the net basket (R01) and retains the fine polypropylene and fibers. Kerosene is returned to the tank from the bottom by a recirculation pump (T01).

R) Suspended aluminum is filtered drain (Y01) after impurities are removed. Kerosene is collected by the return pump (V01) and returned to the kerosene tank (O01) for reuse in the next lot. The aluminum is sent to a press (S01) where most of the residual kerosene is removed. The kerosene remaining in the aluminum melting process is completely vaporized.

As an alternative, the process can be optimized with the following improvements and changes:
A) The film or similar pieces are put into the film feeder (A01) in lot units. The material passes through the check valve (U02) of the suspension tank (B02) after the check valve (U01) installed in the lot supply device (B01).

B) After closing the valve (U01) between the film feeder (A01) and the lot feeder (B01), the solvent is supplied to the suspension tank (B02) at the same time as the fixed amount of film is supplied. Each time a material is charged into the lot supply device (B01), the valve (B02) between it and the suspension tank (B02) is closed.

C) Intermittent supply of the concentrate by the recovery solvent supply device (N01) and the cleaning solvent by the recovery solvent supply device (N02) is performed in the positive direction. The concentrated liquid stage is operated until it is charged. The ratio of solvent to film amount is 8 to 15: 1 and the film is completely immersed in the solvent in the suspension tank (B02) to obtain a polymer / aluminum suspension.

H) The recovered concentrated solution is returned to the concentrated solution tank (F01) and intermittently transferred from the concentrated solution supply device (N03) to a cooling step of 50 to 70 ° C. For this cooling, first, the heat recovery repair machine (LM01) is used to slowly heat the filter with a condensing solvent, and then the condensate cooler (L01) is used to completely cool the material. At this stage, polymer precipitation and insolubilization occur. Next, it is sent to the paste filter (I01), and the filtered solvent is accumulated in the solvent tank (X01) together with the solvent recovered from the solvent steam condenser (J01), and again the heat recovery repair machine (LM01), intermittent. It is returned in the order of the solvent supply device (N04), the solvent heater (M01), and the helicoid screw type movement guide of the polymer residual washer (E01).

I) The diluent discharged from the polymer residual washer (E01) for cleaning aluminum is returned to the diluent tank (F02), and is intermittently returned to the start of the process by the recovery solvent supply device (N02).

The following equipment is used to continuously operate the recycling process by separating components of aluminum packs, aluminum plastic laminates, aluminum cartons, etc .: Rotary valve type or screw conveyor type or conveyor belt type film feeder with measuring instrument (A01) ); Intermittent feeder (B01) with diaphragm valve (U02) installed between film feeder (A01) and continuous feeder (B01A), tangential solvent supply port; vertical inside with heating jacket A cylindrical melting tank (C01) with a fixed spiral cross section, a helical screw type conical type special mesh filter (D01) on the net side, and a check valve on the polymer residual cleaning machine (E01) side. .. The material is flowed from here through a duct to the next process; a cross-section large cylindrical polymer residual washer (E01) fitted with a mesh duct. A cylindrical spiral screw with a drilling shaft and a check valve on the diluent tank (E01) side are installed inside; concentrate tank (F01); diluent tank (F02); beating rotary aluminum extraction special device (G10); The piston (G11) operating inside the cylindrical jet (G12) and the jacket upper opening (G12A) are connected to the pressurized process equipment, and are 180 degrees below the height of the upper opening. There is a lower exit (G12B). The piston (G11) has a semi-cylindrical cavity (G11A) with a cut angle of 45 degrees. Three seal rings are attached to the upper part with respect to the height of the cavity, and another three seal rings are set at equal distances to the lower part; indirect heating type moving guide polymer dryer (H01); indirect Heating jacket type mobile guide type aluminum dryer (K01); Heat exchange type concentrate cooling device (L01); Continuously or intermittently pressurized paste filter (I01); Solvent tank (X01); Heat exchange type solvent steam Condenser (J01); Heat exchange type heat recovery repair machine (LM01); Cleaning solvent supply pump (Z01); Concentrate pump (Z02); Solvent pump (Z03); Kerosene tank (O01); Cylindrical propeller rotation Shear aluminum crusher with cutter and buffer (P01); Floatation tank with air sprayer on the bottom of the tank (Q01); Net basket (R01); Piston press (S01); Recirculation pump (T01); Return pump (V01); Basket type drain filter (Y01).

When intermittently operating the recycling process by separating components such as aluminum packs, aluminum plastic laminates, and aluminum cartons, the following equipment may be used as an alternative, and the following equipment may be used to perform the same or auxiliary functions. Possible: Conical cylinder-shaped suspension tank (B02) between intermittent supply device (B01) and dissolution tank (C01); concentrated solution supply device (N01) with piston type or positive moving pump with measuring instrument and recovery solvent Feeding device (N02).

When isolating aluminum as an aluminum pigment by separating the components of an aluminum plastic container, the basic operation is performed according to the process flow introduced, but at the time of isolation, aluminum is filtered and a ceramic element with closed pores is used at the melting temperature. Clean the aluminum. The filtered material is then cooled and filtered through a paste filter with a porous element. (I01).
Only for the recycling of aluminum plastic carton containers, the process related to this patent has the following manufacturing stages:
A. Stage: Cellulose separation of aluminum plastic carton container (ECAP) is performed in the following order:
Obtaining Dirty Material Fragment (RTS) in Aa Container Crushing Process;
Ab Cleaning of Dirty Material Fragments (RTS): Stir vigorously with room temperature water to remove dirt adhering to the shards. The sewage is collected and recirculated through the sewage removal filter unit (SRF). The reclaimed water (ARE) is also returned to wash and the polymer / aluminum-rich polymer composition clean pieces (RTL) are moved to the crushing stage.

A.c The washed pieces (RTL) are put into a shear crusher and turned into pulp and paper. Cellulose fibers disperse during stirring and are affected by the vortex produced by stirring, and fibers smaller and less dense than the resulting residue are expelled from the net. After being exhaled, it slows down and becomes a polymer / aluminum-rich polymer composition residue (RPA). At this stage, it contains almost no cellulose and is directed to the drying process described in A.d. Cellulose pulp (PC) suspensions are collected after precipitation and processed according to the procedure described in A.e.

Ad Polymer / Aluminum-rich Polymer Composition Residues (RPAs) are flushed during the drying process and indirectly with mildly heated or relaxed vapors, or directly heated air or combustion gases. It is dried. After the drying process, the polymer / aluminum-rich polymer composition residue (RPA) is transferred to step B separation and aluminum and polymer isolation steps.

Filtration of A.e Cellulose Pulp (PC) Suspension: Cellulose pulp (PC) is drained and sent to A.f. Since the filtrate is filtered water (AFIC) that does not contain cellulose, it is returned to A.c and supplied to the cellulose dispersion step while being repeatedly circulated.

A.f Cellulose pulp (PC) is partially dried to dry cellulose (CES). At this stage it can also be directed to papermaking (FPA) or sent to a bleached cellulose (CEB) process.

The cellulose separation process of the A-stage aluminum plastic carton container (ECAP) is carried out using the following equipment:
Crush the container using an EAa mechanical crusher (RME) to obtain dirty material fragments (RTS).

E.A.b cleaning and filtration are performed in a stirring fragment cleaning tank (TLR). Place the crushed material in a perforated basket (CP) and place it in a water-filled tank (TLR). Vigorous stirring is performed while applying pressure from a nozzle directed toward the center of the basket to inject water. Stir the center of the basket violently in the close battle direction. The cleaning sewage passes through the perforated basket (CP) and is recirculated in the equipment inside the facility. The reclaimed water (ARE) is returned to the tank through the sewage removal filter unit (FRS) and reused for the next injection. The filth that collects in the filter unit (SRF) is discarded, and the basket (CP) containing the cleaned debris (RTL) is removed from the tank and sent to the E.A.c.

E.A.c Clean Fragments (RTL) are crushed in a hidrapulper crusher (DHP). Place a perforated or net-type fixed cylinder basket (CCF) in a cylinder tank with a slightly larger diameter. A propeller-type cutter device is attached to the upper part of the basket (CCF), and the shaft is lowered to rotate the propeller in the basket (CCF) while stirring and crushing fragments. Cellulose fibers disperse during stirring and are affected by the vortex of stirring, and fibers smaller and less dense than the resulting residue are expelled from the net. Since the inner basket (CCF) diameter is equally smaller than the diameter of the crusher, the rate of exhaled cellulose slows down and is unaffected by the vortex in the basket. Polymer / aluminum-rich polymer composition residues (RPA) pass through an angle valve located at the bottom of the basket (CCF) with little cellulose. Cellulose pulp (PC) is out of the operating range of the propeller and collects outside the basket (CCF). After settling, it passes through the valve at the bottom of the tank and is sent to E.A.e.

Drying of Polymer / Aluminum-rich Polymer Composition Residues (RPA) using E.A.d Tilt Rotating Net Drum (TTR): Drying with mildly heated or relaxed steam, heated air or combustion gas. The heating fluid is injected from the inside of the rotating net drum (TTR) along the axis, and the dried polymer / aluminum-rich polymer composition residue (RPA) is a B-stage polymer-rich polymer composition. Is washed away in the removal process.

Filtration of cellulose pulp (PC) using an E.A.e liquid cyclone (HC) unit. After filtration, the cellulose pulp (PC) is drained by a transport net conveyor (TET) that also serves as a push operation. The pulp is directed to the E.A.f, and the filtered cellulose-free filtered water (AFIC) is returned to the E.A.c and fed to the crusher (DHP) with repeated circulation.

EAf Cellulose pulp (PC) is dried using a conventional dryer (SEC) to disperse it in dried cellulose (CES) or water again, and then sent to a paper machine (MP) to manufacture paper paper (FPA). Alternatively, it is sent to a bleaching device (BR) and used as a raw material for producing bleached cellulose (CEB).

Steps B. B: Separation of components contained in residues and isolation of aluminum and polymers are performed by the following procedure:
Ba Polymer / Aluminum-rich Polymer Composition Residues (RPA) Dissolution: Low or Medium Boiling (60-250 o C) Alkane Solvents (Preferably Hexanes, Alternative Kerosene or Mineral Oils) 100 Maintain a temperature of ~ 105 ° C and stir or mix (100 ° C is desirable when using kerosene). The residence time of the polymer soaking in the solvent is 2 seconds or more. The concentrated polymer solution (SPC) is flushed through the Bd, causing separation of the polymer and solvent-impregnated aluminum sheet (FAIP).

B.b Cleaning of aluminum sheet (FAIP) impregnated with polymer and solvent: Cleaning and draining with solvent (SOLV). The concentrated polymer solution (SPC) is collected and sent to the solvent-impregnated aluminum sheet (FAIS) separation B.d.

B.c Aluminum sheet (FAIS) is cleaned with a low boiling alkane-based cleaning solvent (SL) (petroleum ether, ethanol 96GL or recovery solvent (SOLV) in the dissolution step). After washing, the concentrated polymer solution (SPC) is flowed to B.d, and the aluminum sheet (FA) is separated by drying and evaporation treatment. The solvent distilled in this process is returned to B.a dissolution as a heat recovery solvent (SOLVQ).

Solvent separation of the B.d polymer is carried out by cooling the solution to 50-70 ° C. Polymer separation of the concentrated polymer solution (SPC) is carried out by a hot filtration method under a pressure of 10 to 10 bar. The extracted pasty polymer (PFP) is filtered through B.e for increased concentration. The recovered thermal solvent (SOLVQ) is returned to the dissolution step of B.a.

B.e. Filtering and cleaning paste polymer (PFP) under pressure. Most of the heat recovery solvent (SOLVQ) is removed and returned to the dissolution step of B.a. In this way, wet powdery cake filtration impregnated with a dissolving solvent is completed.

B, f. When a cleaning solvent (SL) different from the dissolving solvent is used, the solvent impregnated in the cake by using a small amount of low boiling point alkane-based cleaning solvent (preferably hexane or ethanol 96GL) for cleaning the cake filtration. Most of the solvent can be removed and the solvent mixture (MDS) can be recovered. Wet Polymer Powder (PPU) is sent to B.i.

Separation of small amounts of solvent mixture (MDS) by B.g distillation. The heat recovery solvent (SOLVQ) remaining at the bottom of the distillation column is returned to the dissolution of B.a, and the recovery cleaning solvent (SLR) is used again for cleaning.

B.h. If the dissolving solvent has a low boiling point, cake filtration is treated as already moist polymer powder (PPU) at this stage and there is no evidence of a high boiling point solvent.

B.i. Wet polymer powder (PPU) is dried to produce the final product, dry polymer powder (PPS). The vaporized residual solvent is distilled and the recovered thermal solvent (SOLVQ) is returned to the dissolution step of B.a.

The following equipment should be used for the B-stage polymer and aluminum separation and process:
Dissolution of EBa polymer / aluminum-rich polymer composition residues (RPA) is carried out in equipment equipped with stepped, curved bottom surface guide rails. Residues (RPA) injected from the top flow from the rail while receiving vibration. This causes complete polymer dissolution. Suspended aluminum in the polymer solution runs off the rails and flows on a net conveyor belt conveyor (CTL). The drain solution is recirculated by a concentrated polymer solution pump (BSPC) and a concentrated polymer solution filter (FSPC) and finally becomes a concentrated polymer solution (SPC), which is sent to the EBd where the polymer and solvent impregnated aluminum sheet (FAIP) are separated. The process is carried out.

E.B.b. A recovery solvent spray (SOLV) is used to clean the polymer and solvent-impregnated aluminum sheet (FAIP) flowing on the net-type conveyor belt conveyor (CTL). At the same time, the concentrated polymer solution (SPC) is once gravity drained, sent to a vacuum chamber (CAV), vacuum drained, and then sent to the E.B.d solvent-impregnated aluminum sheet (FAIS) separation process.

E.B.c A cleaning solvent (SL) spray is then used to clean the solvent-impregnated aluminum sheet (FAIS) flowing through the net-type conveyor belt conveyor (CTL). At the same time, the concentrated polymer solution (SPC) is once gravity drained, sent to a vacuum chamber (CAV), vacuum drained, and then sent to the E.B.d solvent-impregnated aluminum sheet (FAIS) separation process. The separated sheets are dried with low pressure saturated steam in the lower drying device (SEI). The impregnating solvent is evaporated and separated, and then dew condensation is performed in a solvent condenser (COS) to become a recovery heat solvent (SOLVQ), which is returned to E.B.a and reused.

Solvent separation of E.B.d. concentrated polymer solution (SPC) is performed by an ultrafiltration separator (SU) using a ceramic membrane set under a pressure of 2 to 10 bar. After cooling, the pasty polymer (PFP) is sent to the E.B.e pressure filtration step, and the recovered heat solvent (SOLVQ) is returned to the dissolution of E.B.a.

A wash filter press is used for pressure filtration of E.B.e. paste polymer (PFP). Most of the heat recovery solvent (SOLVQ) is recovered and returned to the dissolution of E.B.a. The resulting cake filtration is granular and the moist polymer powder (PPU) is flushed to the next step. Cleaning with diluted cleaning solvent (SL) completely removes the impregnating solvent and recovers a small amount of solvent mixture (MDS).

EBf A simple solvent distiller (DSS) is used to separate small amounts of solvent mixture (MDS), and the solvent (SOLVQ) recovered from the bottom of the distiller (DSS) is returned to the dissolution of EBa and reused. .. The recovered cleaning solvent (SLR) recovered from the top of the distiller (DSS) is used again for cleaning. Wet Polymer Powder Powder (PPU) is then transferred to a Polymer Dryer (SEPO). In this way, dry polymer powder (PPS) is completed. The vapor of the residual solvent is sent to the solvent condenser and the recovered thermal solvent (SOLVQ) is returned to the dissolution of etapa E.B.a.

Ba's aluminum-polymer separation process can be replaced by the following equipment and procedures:
When the EBa1 polymer / aluminum-rich polymer composition residue (RPA) passes through a net-type conveyor belt conveyor (CTL), it is immersed in a recovery solvent (SOLV) and vibrated by circulating solvent injection. The equipment used for polymer residence time is a concentrated polymer solution filter (FSPC) and a concentrated polymer solution pump (BSPC). The concentrated polymer solution (SPC) runs off the net due to gravity, and the polymer and solvent-impregnated aluminum sheet (FAIP) remaining on the conveyor is isolated on the conveyor (CTL).

The process of separating Ba aluminum and polymer can be replaced by the following equipment and procedures:
EBa.2 Polymer / aluminum-rich polymer composition residues (RPA) are dissolved in a Hildebrand extractor using a dissolving solvent (SOLV). The concentrated polymer solution (SPC) is drained by the gravity method to obtain a solvent-impregnated aluminum sheet (FAIP).

Polymer separation of Bd can be performed as an alternative with the following equipment and procedures:
Separation of the EBd1 polymer solvent is carried out by setting the solution cooling heat exchanger (RSTC) to 50-70 ° C and operating the press filter (FFP) at a maximum of 1,5 bar. The solvent (SOLVQ) recovered at 50 to 70 ° C is heated to 100 ° C with a solvent heater (AQS) and returned to the dissolution of Ba e tapa for reuse. The extracted paste-like polymer (PFP) is sent to the Be filter press.

A EB e EC aluminum and polymer separation can be performed as an alternative with the following equipment and procedures ::
Step B. B: Use of a solvent with a boiling point within the operating temperature range of the process to obtain aluminum film (FIA) from concentrated polymer solution (SPC).

Polymer / Aluminum-rich Polymer Composition Residue (RPA) in EBA Melting Tank (TQD) Perforated (CP) Basket Position: Mount a support on the wall to prevent the basket from touching the tank directly. Close the lid of the tank with the basket on it. The melting tank (TQD) will be equipped with two separate heating devices that operate on saturated steam: one is a thermal siphon (TSF) type and uses a large amount of solvent (using a solvent with a boiling point in the process temperature range). Immerse the basket completely for dissolution. The second heating device is installed at the bottom of the tank and is a steam jacket type, so it is suitable for using a small amount of solvent. The basket is completely above the surface of the solvent and acts as a Soxhlet extractor during the aluminum cleaning process: it is connected to a reflux condenser (CR) with controlled temperature, pressure and water volume. Heating steam, water supply flow rate, thermosiphon circulation, pressure control in the melting tank, etc. are also controlled. A valve is attached to the bottom of the tank to transfer the solution to the solvent concentrator (TCS).

Transfer the dissolution solvent (SOLV) having a boiling point within the process temperature range from the EBB solvent tank (TS) to the dissolution tank (TQD): Polymer / aluminum-rich polymer composition residue (RPA) perforated basket (CP) Is completely immersed and dissolution begins. By supplying steam to the thermosiphon (TSF) connected to the dissolution tank (TQD), the solvent in the tube bundle is heated and vaporized to move the liquid column. This column plays a role in the transfer of liquid solvent and circulation through polymer / aluminum-rich polymer composition residue (RPA) fragments. The solvent falls to the bottom and is returned to the tube bundle in repeated cycles (effective dissolution with an efficient recirculation method); partial vaporization of the solvent occurs after 1-5 minutes of circulation. The vaporized solvent is condensed in the reflux condenser (CR) and returned to the tank. Finally, the concentrated polymer solution (SPC) passes from the valve through the hollow fiber filter (FL) to the solvent concentration tank, and the E.B.F process starts. The high temperature condition when passing through the filter (FL) has the effect of significantly lowering the concentration of the solution. Further, due to the solvent ratio used, a stable paste state is completed after cooling.

E.B.C Return the solvent from the solvent tank to the dissolution tank (TQD) again (height below the bottom of the basket (CP)) and start cleaning. At this time, steam is supplied to the jacket attached to the melting tank. The solvent at the bottom of the tank is heated and the steam goes down the basket and reaches the reflux condenser (CR) at the top. The cooler maintains a pressure corresponding to the melting temperature. The solvent condensed at a temperature slightly lower than the saturation temperature permeates the contents in the basket, absorbs heat when it comes into contact with the updraft, and falls as hot water droplets on the fragments in the basket, and is a concentrated polymer solution that still contains aluminum residue. (SPC) Cleaning is performed. The solution is transferred below the bottom of the basket and the aluminum is thoroughly washed. Concentrated polymer diluent (SPD) is transferred to the diluent tank (TSD) via internal pressure by a valve mounted on the tank (TQD) wall side. A reflux condenser (CR) located above the lysis tank (TQD) provides a condensate for a new polymer / aluminum-rich polymer composition residue (RPA) batch (new solvent or recovery solvent). Replenishment).

After the E.B.D cleaning process, the solvent is completely transferred from the dissolution tank (TQD) with the bottom valve closed, and then the vacuum system (SV) is started to create a vacuum environment. The steam is directed to a reflux condenser (CR) (SV), from which it is discharged to the atmosphere. The steam in the jacket retains the heat of the tank. The residual steam in the melting tank (TQD) is then sent to the reflux condenser (CR) along with the purging nitrogen (NPP) airflow, where it is discharged to the atmosphere.

After the E.B.E purge is completed, the dissolution tank (TQD) is opened, the basket (CP) is taken out, and the aluminum film fragment from which the polymer-rich polymer composition has been removed is collected and returned to E.A.b. The recovered aluminum is sent to a melting furnace for casting or other purposes.

The concentrated polymer solution (SPC) in the EBF solvent concentrator is heated and the vapor generated by partial distillation of the solvent is sent to the reflux condenser (CRS) and the recovered heat solvent (SOLVQ) is the solution for replenishing the dissolution tank (TQD). Transferred to storage tank (TES). Preparation solution (SR) of polymer composition containing a large amount of polymer has high viscosity properties and is directly EBG, C.1.a, C.2.a, C.3.a, C.4.a or C.I. 5. Can be sent to a.

E.B.G A high-viscosity polymer-rich polymer composition preparation solution (SR) is applied to relaxed vapor (VAS) with some of the solvent removed. This process is carried out using relaxed direct vapor at a temperature close to the softening temperature of the polymer-rich polymer composition. Under this condition, the enthalpy of steam is high, and solvent removal can be performed more accurately and efficiently. At the same time, saturated joint steam is applied at a temperature close to that of the steam injected into the jacket of the solvent concentrator (TCS). (Because of the atmospheric conditions, the operating temperature is higher than the boiling point of the solvent and is mostly removed); the vapor (water and solvent) resulting from this operation is sent to the condenser, the condensed water is discharged and the solvent vapor is condensed in condenser 1 ( It exits from the top of CD1) and enters condenser 2 (CD2), where solvent condensation occurs. It is flushed into a solution storage tank (TES) of the recovery heat solvent (SOLVQ) that supplies the dissolution tank (TQD) while still hot. Storage of hot solvent contributes to energy saving in the process). The level of solvent removal at this stage is controlled according to the application of concentrated polymer solution (SPC) recycling (for film, powder or pellet, etc.).

C. C stage: Polymer for reuse:
C.1 Precipitate
EC1.a A preparation solution (SR) having a polymer composition rich in high-viscosity polymer is precipitated with ethanol (AE) in a settling tank (TPP) with stirring using an indirect cooling method;
The EC1.b precipitated polymer is then filtered (FIL) to separate the powder. Transfer the powder to a water tank (TA) to remove residual solvent.

E.C.1.c Solvent removal is performed by direct heating with steam (VA). The solvent vapor is flowed into the condenser (COND) and then transferred to the settling tank (TDE) where the immiscible phase and the supernatant solvent are separated.

E.C.1.d Distill the aqueous phase using an ethanol distiller (DESA) to recover the recovered ethanol (AER). The organic phase containing a large amount of dissolution solvent is distilled in a solvent distiller (DESH). As a result, a small amount of ethanol can be recovered in phase equilibrium with the heat recovery solvent (SOLVQ) and the solution.

The E.C.1.e extracted polymer is final filtered (FIL) and dried in a conventional dryer (SEC). In this way, dry polymer powder (PPS) is completed.

For aluminum polyfilm containers containing polypropylene or polyethylene (without paper), operate in steps B and C (after polymer removal). It is almost the same as the polymer / aluminum residual recovery method, and the only difference is the operating temperature. When heated to about 100 ° C, only polyethylene dissolves, and polypropylene remains insoluble. Under these conditions, the solution is filtered and the insoluble solids of polypropylene and aluminum are washed with petroleum ether and then rewashed with ether. Put it in a milling machine that is not completely immersed in the liquid. The liquid referred to here may be, for example, ethanol. When milled under these conditions, the aluminum is crushed and the polypropylene remains as large pieces, which makes it easier to sift and separate them later.

You can also make your energy more comfortable. Considering the various recovery flows of the entire process, heat recovery is performed at all stages of pulp, polymer and aluminum separation. Gas use from a boiler (tower) as an example. The temperature when coming out of the tower reaches up to 250 ° C. It is used to dry the polymer from which the cleaning solvent has been removed. In the case of aluminum melting, if the ingot cooling treatment is performed in a dedicated chamber, the gas that has absorbed the heat of aluminum can be used for solvent heating or for cellulose drying after removing cellulose, before putting it into solubilization, and for drying polymer powder after removing the cleaning solvent. Rich in applicability such as use. Since it is a gas from 650 ° C to the final 105 ° C, it can be used reliably.

Claims (5)

A "aluminum pack, aluminum plastic laminate, recycling method according to component separation such as aluminum cartons", aluminum or plastic or carton laminate container to separate plastic film and aluminum polyethylene or polypropylene with a polymer solubilized with Solvent Related to the component separation method,
The solubilization process involves pressurizing the material below the softening temperature of the polymer, then separating the solvent from the polymer by using a non-solvent dilution of the polymer that is reciprocal other than the main solvent or by lowering the temperature, and finally the solvent of that solvent. The process of filtering, returning to the solubilization stage and reusing, the procedure of continuously rotating this cycle is as follows:
A) The film or similar pieces are put into the film feeder (A01) in lot units, and after the check valve (U01) where the material is installed in the lot feeder (B01), the continuous feeder (B01A) is checked. Pass through the valve (U02);
B) Send the set amount of film fragments from the intermittent supply device (B01) to the continuous supply device (B01) with the check valve (U02) open with the check valve (U01) closed, and close the check valve (U02) to check valve. (U01) is opened and the material is charged into the intermittent supply device (B01).
C) The film is charged into the continuous supply device (B01A) by the screw transfer device, and at the same time, the solvent is washed into the suspension tank (B02) by closing the check valve (U02). The film is completely immersed in the solvent in a suspension tank (B02) with a solvent to film volume ratio of 8 to 15: 1 to suspend the polymer / aluminum;
D) The suspension is transferred to a melting tank (C01) and a long circulation path is agitated by joint heating from 100 ° C to 105 ° C by an internal helical pitch shaped rotating device, which maintains a residence time of 2-5 seconds. By doing so, the convection will be better;
E) Suspended fluid of dissolved polymer and aluminum is sent to a special mesh filter (D01) by a helicoid screw type moving guide, thus separating aluminum from the concentrated solution;
F) The concentrated liquid flowing from the mesh hole while applying back pressure to the fluid to keep the pressure in the melting tank (C01) is sent to the concentrated liquid tank (F01), and the residual aluminum is next with the guide of the special mesh filter (D01). shed step (a polymer residue washer (E01)), where material from front and rear to the preceding pipes connecting two steps of this device is not to proceed on the surface, the case is the helicoid screw moving guide The aluminum is flushed through the dedicated outlet (G01) while changing the speed by
G) The filtered and condensed solvent sent from the solvent tank (X01) by the helicoid screw type moving guide is injected into the polymer residual washer (E01), and the polymer remaining in the aluminum is removed in the cleaning tank (E01), causing the dissolution tank. (C01) The diluent is recovered and returned to the diluent tank (F02) while applying back pressure to the fluid to maintain pressurization;
H) The concentrate recovered in F) is returned to the concentrate tank (F01) and continuously cooled to 50 to 70 ° C using the concentrate pump (Z02). The solvent is slowly heated with a condensate solvent and then completely cooled in a condensate cooler (L01). At this stage, polymer precipitation and insolubilization occur, and then the solvent is sent to a paste filter (I01) and filtered. Is stored in the solvent tank (X01) together with the solvent recovered from the solvent steam condenser (J01), and again the heat recovery repair machine (LM01), solvent pump (Z03), solvent heater (M01) and polymer residual cleaning machine. Returned in the order of the helicoid screw type movement guide of (E01);
I) The diluent discharged from the polymer residual washer (E01) during the aluminum cleaning in G ) is returned to the diluent tank (F02) and continuously returned to the start of the process by the cleaning solvent supply pump (Z01), and the paste filter. The cake after filtration in (I01) flows to the polymer dryer (H01), and the vapor of the solvent impregnated in the cake generated in the polymer dryer (H01) is the solvent vapor condenser (J01).
And the condensing solvent is accumulated with the condensing solvent from the aluminum dryer (K01);
L) All of the solvent vapor is condensed and then sent to the solvent tank (X01) for reuse in aluminum cleaning and back into the process;
M) Aluminum is intermittently extracted from the aluminum extraction special device (G1O), where the extraction port is designed to rotate and open and close intermittently, and the position can be adjusted vertically, so the melting tank (C01) ) Is stabilized, the polymer-removed aluminum is sent to the dryer (K01), the solvent vapor is separated and sent to the solvent steam condenser (J01), and the steam sent from the polymer dryer (H01). Accumulate with;
O) Dry aluminum material containing a small amount of cellulose fiber, cap fragments, propylene tape, etc. is put into an aluminum crusher (P01) in lot size, and room temperature kerosene is added and shear crushed to perform residual polymer and cellulose. Fiber is removed;
P) Stop stirring, transfer the suspended aluminum to the flotation tank (Q01), and spray it with air using the device installed at the bottom of the crusher (P01). ;
Q) This foam is always removed by draining the supernatant, the foam goes through the net basket (R01) and retains fine polypropylene and fibers, and the kerosene is recirculated by the recirculation pump (T01).
R) Suspended aluminum is filtered drain (Y01) after impurities are removed, kerosene is collected by a return pump (V01) and returned to the kerosene tank (O01), reused for the next lot, and aluminum is pressed (S01). ), Where most of the residual kerosene is removed, and the kerosene remaining in the aluminum melting process is completely vaporized. "Recycling method by separating components such as aluminum packs, aluminum plastic laminates, and aluminum cartons". The method of claim 1, wherein the solubilization process separates the solvent from the polymer by using a dilution of a non-solvent polymer that is reciprocal other than the main solvent . "Equipment" used in the recycling process by separating components of the aluminum pack, aluminum plastic laminate, aluminum carton, etc. according to claim 1 , which is characterized by the following:
Film feeder (A01) with rotary valve, screw conveyor or conveyor belt type measuring instrument; intermittent supply with diaphragm valve (U02) installed between film feeder (A01) and continuous feeder (B01A) Vessel (B01), tangential solvent supply port; cylindrical melting tank (C01) with a fixed spiral pitch in the vertical direction on the inside using a heating jacket, helical screw type conical type special mesh filter on the net side A check valve is installed on the side of (D01) and the polymer residual cleaning machine (E01). Material flows as the next process of the duct here; a network duct mounted cross-section sized cylindrical polymer residues washer (E01), diluent a cylindrical helical thread having a perforation axis inside bath (F02) polymers check valve is attached to the side residual washer (E01); concentrate tank (F01); a pulsation rotary aluminum extraction special equipment (G10),; diluent tank (F02) The piston (G11) and jacket upper port (G12A) that operate inside the cylindrical jet (G12) are connected to the pressurized process equipment, and the lower port (G12B) is located 180 degrees below the height of the upper port. ) there is, the piston (G11) has a semi-cylindrical cavity (G11A), the cut angle is Ri 45 degrees der, the bottom has three sealing rings at the top is attached to the height of the cavity Beating rotary aluminum extraction special device (G10) with three more seal rings set at equal distances; Indirect heating type moving guide type polymer dryer (H01); Indirect heating jacket type moving guide type aluminum drying Machine (K01); Heat exchange type concentrate cooling device (L01); Continuously or intermittently pressurized paste filter (I01); Solvent tank (X01); Heat exchange type solvent steam condenser (J01); Heat exchange type Heat recovery repair machine (LM01); Cleaning solvent supply pump (Z01); Concentrate pump (Z02); Solvent pump (Z03); Kerosene tank (O01); Shear aluminum with cylindrical propeller rotary cutter and buffer device Crusher (P01); Floatation tank with air sprayer attached to the bottom of the tank (Q01); Net basket (R01); Piston press (S01); Recirculation pump (T01); Return pump (V01) ; Basket type drain filter (Y01). According to claim 1 A "aluminum pack, aluminum plastic laminate, recycling method according to component separation such as aluminum carton", when isolating the aluminum as aluminum pigment component separation aluminum plastic containers, aluminum when isolation The method according to claim 1, wherein the material is filtered and washed with aluminum at a melting temperature using a ceramic element having closed pores , and then the filtered material is cooled and applied to a paste filter (I01) using a porous element. When isolating aluminum as aluminum pigment component separation aluminum plastic container, a aluminum pack according to claim 4, aluminum plastic laminate, is used in the recycle process according to component separation such as aluminum carton "equipment" , Equipment where the filter (I01) is ceramic.

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