KR20210080950A - Waste acrylic recycling system and waste acrylic recycling method - Google Patents

Abstract

The present invention relates to a regeneration system for recovering an acryl material from waste acryl and a regeneration method using the same. Particularly, the present invention relates to a regeneration system capable of increasing the regeneration ratio of a reusable regenerated acryl material from waste acryl and minimizing waste generation, and a regeneration method using the same. The regeneration system for recovering an acryl material from waste acryl includes: a base regeneration unit including a first regeneration vessel to which waste acryl is introduced and a first heating means for heating the first regeneration vessel to melt and vaporize the waste acryl, and configured to produce a first extract through a condensation process; a raw material regeneration unit including a second regeneration vessel to which the first extract supplied from the base regeneration unit is introduced and a second heating means for heating the second regeneration vessel to vaporize the first extract, and configured to recover a regenerated material through a condensation process; and a precipitate layer regeneration unit including a precipitate layer regeneration vessel for receiving the lower layer solution precipitated in the bottom of the second regeneration vessel and discharged therefrom and a third heating means for heating the precipitate layer regeneration vessel to vaporize the lower layer solution, and configured to recycle the second extract produced through a condensation process to the second regeneration vessel.

Description

A recycling system for obtaining acrylic raw materials from waste acrylic and a recycling method using the same {WASTE ACRYLIC RECYCLING SYSTEM AND WASTE ACRYLIC RECYCLING METHOD}

The present invention relates to a recycling system for obtaining an acrylic raw material from waste acrylic and a recycling method using the same, and more particularly, it can increase the recycling rate of a recyclable acrylic raw material from waste acrylic and minimize the generation of waste. A regeneration system for obtaining acrylic raw materials from waste acrylic that can effectively extract recycled raw materials without adding additional substances in the process of acrylic regeneration, thereby improving the quality of acrylic recycled raw materials and reducing regeneration costs, and a regeneration method using the same is about

In general, acryl is a transparent plastic having superior light transmittance than glass, and is also called polymethacrylate (PMMA: Polymethylmethacrylate) or methyl methacrylate (MMA: Methylmethacrylate).

In addition, acrylic is widely used in various fields due to the convenience of production and the variety of color and shape deformation. As a result, scrap is generated in the manufacturing process of acrylic products, and the amount of acrylic discarded after use is increasing.

When the waste acrylic as described above is treated by incineration, air pollutants such as dioxins are generated and acrylic is widely recycled in that it is an expensive material.

The recycling method of waste acrylic is to pulverize, melt, and refine waste acrylic and regenerate it as a liquid acrylic raw material. For example, in Korean Patent Registration No. 10-1985147, 'acquiring acrylic raw material from waste oil from waste acrylic recycling process' extraction method' is disclosed, and it is to be performed by an apparatus as shown in FIG.

The extraction method for obtaining the acrylic raw material is an extraction method for extracting the acrylic raw material from the waste oil from the waste acrylic regeneration process of regenerating the acrylic raw material with waste acrylic, a) heating the waste oil to 500 ~ 800 ° C. collecting the condensate condensed by cooling the gas generated by the method to obtain a primary extract; b) The first extract is heated to 450 ~ 750 ° C, and the condensed liquid is collected by cooling the gas generated by heating, but in the middle time period except for the initial predetermined time and the last predetermined time among the total condensate collection time collecting the collected condensate to obtain a secondary extract; c) preparing a mixed solution by mixing the secondary extract with hydroquinone monomethyl ether; d) The mixture is heated to 400 ~ 750 ° C, and the condensed liquid is collected by cooling the gas generated by heating, but is collected in the intermediate time period except for the initial predetermined time and the last predetermined time among the total condensate collection time Collecting the condensate to obtain an acrylic recycled raw material; includes.

In the conventional extraction method for obtaining the acrylic raw material described above, compared to the inputted waste acrylic, only 85% by weight is recycled as a liquid acrylic raw material, and the remaining 15% by weight remains as waste, so it must be treated by incineration, etc., which causes environmental pollution. There are limitations that still exist.

And the conventional extraction method for obtaining the acrylic raw material has a disadvantage in that the step of preparing a mixed solution by mixing hydroquinone monomethyl ether after the step of obtaining the secondary extract is additionally performed. In particular, since the step of preparing such a mixed pressure solution is to inject a separate compound, there is a limitation in that the transparency of the naturally regenerated acrylic raw material is reduced (increased turbidity), resulting in poor marketability, and since additional raw materials such as compounds are added, regeneration The disadvantage is that the cost increases.

Korea Patent No. 10-1985147 'Extraction method to obtain acrylic raw material from waste oil from waste acrylic regeneration process' Korea Patent No. 10-1048268 'Recycling method of waste acrylic resin'

The present invention has been proposed in view of the above, and a regeneration system for obtaining an acrylic raw material from waste acrylic and a recycling method using the same to increase the regeneration efficiency of a recyclable acrylic raw material recyclable from waste acrylic and minimize the generation of waste Its purpose is to provide

Another object of the present invention is to extract acrylic raw materials from waste acrylic so that it is possible to effectively extract recycled raw materials without adding additional materials in the process of recycling waste acrylic, thereby improving the quality of acrylic recycled raw materials and reducing regeneration costs. An object of the present invention is to provide a reproduction system for obtaining and a reproduction method using the same.

In order to achieve the above object, the regeneration system for obtaining acrylic raw material from waste acrylic according to the present invention is a regeneration system for obtaining acrylic raw material from waste acrylic, the primary regeneration container into which the waste acrylic is put, the primary regeneration container a basic regeneration unit having a primary heating means for melting and vaporizing waste acrylic by heating and generating a primary extract through a condensation process; A secondary regeneration container into which the primary extract supplied from the basic regeneration unit is put, a secondary heating means for heating the secondary regeneration container to vaporize the primary extract, and to obtain a regeneration raw material through a condensation process raw material recycling unit; and a sedimentation layer regeneration container in which the lower layer solution precipitated in the lower part of the secondary regeneration container is discharged and accommodated, and a tertiary heating means for heating the sedimentation layer regeneration container to vaporize the lower layer solution, and generated through a condensation process and a sedimentation layer regeneration unit for recycling the secondary extract to the secondary regeneration container.

The basic regeneration unit condenses the gas passing through the primary discharge line connected to the primary regeneration vessel to generate the primary extract, a primary heat exchange unit for generating the primary extract, a primary extract storage container in which the primary extract is accommodated, and the It may be configured to include a first pressure-feeding pump for pressurizing the primary extract accommodated in the primary extract storage container to the secondary regeneration container via a primary transfer line.

The raw material regeneration unit may be configured to include a secondary heat exchange unit for generating the recycled raw material by condensing the gas passing through the secondary discharge line connected to the secondary regeneration container, and a recycled raw material storage container in which the recycled raw material is accommodated. have.

The sedimentation layer regeneration unit includes a tertiary heat exchange unit for condensing gas passing through a tertiary discharge line connected to the sedimentation layer regeneration container to form a secondary extract, a secondary extract storage container in which the secondary extract is accommodated, the It may be configured to include a second pressure-feeding pump for pressurizing the secondary extract of the secondary extract storage container to the secondary regeneration container via a secondary transfer line.

Preferably, the precipitation layer regeneration unit further includes a buffer container connected to the secondary regeneration container by a drain line to discharge the lower layer solution and performing a buffer function, wherein the buffer container is configured to be separable from the drain line. It can be arranged in the tertiary heating means for the purpose of the sedimentation layer regeneration container.

On the other hand, the precipitation layer regeneration unit, the buffer container for performing a buffer function connected to the secondary regeneration container and the drain line so that the lower layer solution is discharged; a tertiary transfer line installed to supply the secondary extract of the secondary extract storage container to the buffer container; a secondary extract control valve unit for controlling the flow of the secondary extract flowing to the secondary transfer line and the tertiary transfer line; a sedimentation layer transport line connected between the buffer container and the sedimentation layer regeneration container; and a third pressure-feeding pump installed in the sedimentation layer transfer line and pressurizing the lower layer solution containing the secondary extract contained in the buffer container to the sedimentation layer regeneration container.

Here, the sedimentation layer regeneration unit includes a sedimentation layer control valve for controlling the inflow of the lower layer solution into the buffer container; and a stirrer installed in the buffer container to mix the secondary extract solution and the lower layer solution.

In the regeneration method using a regeneration system for obtaining acrylic raw material from waste acrylic according to the present invention, the regeneration method using a regeneration system for obtaining acrylic raw material from waste acrylic according to the present invention, in which the waste acrylic injected into the primary regeneration container is A primary extract solution obtaining step of heating to 500 to 800° C. for 12 to 14 hours by a sub-heating means and condensing the vaporized gas to obtain a primary extract; and heating the secondary regeneration container into which the primary extract is injected at 400 to 700° C. for 13 to 15 hours by the secondary heating means, and condensing the vaporized gas to obtain a regeneration raw material; and heating the sedimentation layer regeneration container in which the solution of the lower layer of the secondary regeneration container is discharged and accommodated by the tertiary heating means to 550 to 850° C. for 4 to 20 hours and condensing the vaporizing gas to obtain a secondary extract. and a step of obtaining a tea extract, wherein the step of obtaining a regenerated raw material is performed by mixing the second extract obtained in the obtaining of the first extract with the first extract.

The secondary extract obtaining step may further include a mixing process of mixing the secondary extract with the lower layer solution generated in the regenerated raw material obtaining step.

Here, the mixing process may be performed by adding the secondary extract in an amount of 5 to 20% by weight based on the weight of the lower layer solution.

Preferably, the step of obtaining the regenerated raw material may be performed until 4 to 16 wt% with respect to 100 wt% of the first extract injected into the secondary regeneration container remains as the lower layer solution.

In addition, the heating temperature of the regenerated raw material obtaining step can be carried out to be a lower temperature in the range of 50 to 100 ℃ than the heating temperature of the first extract obtaining step.

The heating time of the regenerated raw material obtaining step may be longer than the heating time of the primary extract obtaining step in the range of 1 to 3 hours.

According to the regeneration system for obtaining an acrylic raw material from waste acrylic according to the present invention and a regeneration method using the same, the waste precipitated in the extraction process of the acrylic recycled raw material is not discarded, but is extracted as a recycled raw material once more by the sedimentation layer regeneration unit. It is possible to increase the regeneration efficiency and minimize the generation of waste, thereby reducing environmental pollution.

According to the regeneration system for obtaining an acrylic raw material from waste acrylic according to the present invention and a regeneration method using the same, a separate material is not added in the regeneration process of waste acrylic, and the heating temperature and heating time are appropriately controlled for each regeneration process. As a result, the recycled raw material does not change to colored, so it is possible to improve marketability and reduce the cost of recycling.

1 is a view for explaining an extraction method for obtaining an acrylic raw material from waste oil from a waste acrylic recycling process;
2 is a view for explaining a regeneration system for obtaining an acrylic raw material from waste acrylic according to a first embodiment of the present invention, and is a schematic diagram showing the main components in a simplified manner to help understanding.
3 is a view for explaining a regeneration system for obtaining an acrylic raw material from waste acrylic according to a second embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. 2 to 3, the same reference numerals are given to the same components in FIGS. 2 to 3 to be described.

On the other hand, in each drawing, a detailed description of a configuration that can be easily recognized by a person of ordinary skill in the art from a general technique, and an action and effect thereof will be simplified or omitted. In addition, since the present invention has the characteristics of a regeneration system for obtaining an acrylic raw material from waste acrylic and a regeneration method using the same, the related parts will be mainly illustrated and described, and the description of the remaining parts will be simplified or omitted.

2 is a view for explaining a regeneration system for obtaining an acrylic raw material from waste acrylic according to a first embodiment of the present invention, and is a schematic diagram showing the main components in a simplified manner to help understanding.

Referring to FIG. 2, the recycling system for obtaining acrylic raw materials from waste acrylic according to the first embodiment of the present invention heats and melts waste acrylic such as acrylic scrap and waste acrylic, and then condenses the vaporized gas to regenerate the liquid. As a regeneration system for obtaining raw materials, a basic regeneration unit (1), a raw material regeneration unit (2) and a sedimentation layer regeneration unit (3) are provided.

The basic regeneration unit 1 is a component that melts solid waste acrylic and condenses the vaporizing gas to generate a primary extract, and heats the primary regeneration container 11 and the primary regeneration container into which the waste acrylic is put. A primary heating means 12 for melting and vaporizing waste acrylic is provided.

The primary regeneration container 11 is formed in the form of a closed tank having a substantially cylindrical shape, and an openable and openable door (not shown) for inputting waste acrylic is provided at the upper portion, and a pressure sensing means 19a for sensing the internal pressure. ), a temperature sensing means (19b) for sensing the internal temperature, etc. are installed.

In addition, the primary regeneration container 11 is preferably made of a material such as Korean standard STS 316L, which contains molybdenum in stainless steel and has a very low carbon content so as to satisfy chemical resistance, heat resistance, acid resistance, corrosion resistance, etc. .

The primary heating means 12 may be configured to heat the primary regeneration container using fossil fuels or the like as an energy source, but in this embodiment, it is heated by electric energy to improve the working environment and reduce air pollution. It consists of a structure in which an electric heater is built into the heater base.

In addition, the basic regeneration unit 1 includes a primary heat exchange unit 13 for generating a primary extract by condensing the gas vaporized in the primary regeneration container 11, and a primary extract solution in which the generated primary extract is accommodated. A storage container 14, and a first pressure-feeding pump 15 for pressure-feeding the primary extract to a secondary regeneration container 21 to be described later are configured.

The primary heat exchange unit 13 may be configured without any particular limitation as long as it is a heat exchanger capable of condensing gas through heat exchange, but in this embodiment, the primary exhaust line 17 through which the gas passes is built-in and the cooling water is not filled. is a water-cooled heat exchanger having a cooling chamber 131, a cooling water supply line 132 connected to the cooling chamber 131 for supplying cooling water, and a cooling water recovery line 133 for discharging cooling water. have.

The first pressure pump 15 is a pump installed in the primary transfer line 18, which is a pipe installed between the primary extract storage container 14 and the secondary regeneration container 21 to be described later, and has chemical resistance, heat resistance, Applies to materials made of acid-resistant and corrosion-resistant materials.

On the other hand, the raw material regeneration unit 2 is a component that generates a recycled raw material by heating the primary extract produced in the liquid phase to vaporize and condensing the gas to be vaporized again while passing through the basic regeneration unit 1, and the basic regeneration unit ( A secondary regeneration container 21 into which the primary extract liquid supplied from 1) is put, and a secondary heating means 22 for heating the secondary regeneration container to vaporize the primary extract liquid are provided.

In addition, the raw material regeneration unit 2 includes a secondary heat exchange unit 23 that condenses the gas passing through the secondary discharge line 27 connected to the secondary regeneration vessel 21 to generate a renewable raw material, and secondary heat exchange. A recycled raw material storage container 24 is configured in which the recycled raw material generated through the heat exchange action of the unit 23 is accommodated.

In addition, the secondary regeneration container 21 has a pressure sensing means 29a and a liquid amount detecting means 29c that can check the amount of the primary extract and the remaining lower layer water solution input together with the pressure detecting means 29a and the temperature detecting means 29b. It is preferred to be constructed. Here, the liquid amount detecting means may be configured by selecting from among a flow meter capable of detecting a flow rate, a level sensor detecting the level of the liquid, and a load cell capable of detecting the weight of the liquid.

On the other hand, the sedimentation layer regeneration unit 3 is generated as a regenerated raw material by vaporizing in the above-described raw material regenerating unit 2 in the primary extract, and then settles down due to specific gravity in the lower portion of the secondary regeneration container 21 and remains in the lower layer. As a component for processing the solution, the sedimentation layer regeneration container 31, the tertiary heating means 32, the tertiary heat exchange unit 33, the secondary extract storage container 34, and the second pressure pump 35 are used. Consists of.

The sedimentation layer regeneration container 31 is a container in which the lower layer solution precipitated in the lower part of the secondary regeneration container 21 is discharged and accommodated, and the tertiary heating means 32 heats the sedimentation layer regeneration container 31 and accommodates the lower part. It is a component that vaporizes the solution, and the tertiary heat exchange unit 33 condenses the gas flowing through the tertiary discharge line 37 connected to the sedimentation layer regeneration vessel 31 to generate the secondary extract. .

In addition, the secondary extract liquid storage container 34 is a container in which the secondary extract generated in the heat exchange process of the tertiary heat exchange unit 33 is accommodated and stored, and the second pressure pump 35 is a secondary extract liquid storage container 34 . ) is a pump that pressurizes the secondary extract accommodated in the secondary regeneration container 21 through the secondary transfer line 38 .

On the other hand, the sedimentation layer regeneration unit 3 further comprises a buffer container 41 that is connected by a secondary regeneration container 21 and a drain line 42 to perform a buffer function so that the lower layer solution is discharged and accommodated. has been

The buffer container 41 is configured to be separable from the drain line 42, and is moved by a moving means (not shown) such as a crane or a forklift in a state separated from the drain line and installed in the tertiary heating means 32. It can be used for the purpose of the sedimentation layer regeneration container 31 used in the secondary extract obtaining step to be described later.

Here, the buffer container 41 is preferably arranged to correspond to each secondary regeneration container when the secondary regeneration container 21 is composed of a plurality, and may be additionally arranged with a sufficient margin for continuous flow operation.

In addition, the drain line 42 is provided with a sedimentation layer control valve 43 for controlling the flow of the lower layer solution, such as when the buffer container 41 is separated.

On the other hand, the container or piping constituting the above-described basic regeneration unit 1, raw material regeneration unit 2, and sedimentation layer regeneration unit 3 is made of stainless steel to satisfy chemical resistance, heat resistance, acid resistance, corrosion resistance, and the like. It is preferable to be made of the same material as the Korean standard STS 316L, which contains molybdenum and has a very low carbon content.

Hereinafter, a regeneration method using a regeneration system for obtaining an acrylic raw material from waste acrylic according to a first embodiment of the present invention will be described.

The regeneration method using a regeneration system for obtaining acrylic raw materials from waste acrylic according to the first embodiment of the present invention is a primary method of obtaining a primary extract from waste acrylic by the basic regeneration unit 1 as shown in FIG. Extraction liquid obtaining step, regenerated raw material obtaining step of obtaining a regenerated raw material from the primary extract by the raw material regenerating unit (2), and a secondary extracting liquid obtaining step of obtaining a second extracting liquid from the first extracting liquid by the sedimentary layer regenerating unit (3) However, the regenerated raw material acquisition step is characterized in that the secondary extract is mixed with the primary extract.

In the first extract obtaining step, 600 Kg of waste acrylic such as a waste acrylic plate is put into the primary regeneration container 11, and it is melted for 12 to 14 hours in the range of 500 to 800° C. by the primary heating means 12, while heating In the process, the gas vaporized through the primary discharge line 17 is passed through the primary heat exchange means 13 and condensed to generate a primary extract.

Preferably, the heating temperature of the primary regeneration container 11 is carried out at a set temperature in the range of 550 to 650 ° C. It is preferable to carry out by adding or subtracting within the range of ±30 minutes based on 13 hours at this set temperature.

The regeneration raw material acquisition step is to condense the vaporized gas by heating the secondary regeneration container 21 into which the primary extract is put in the range of 400 to 700° C. by the secondary heating means 22 for 13 to 15 hours to obtain a recycled raw material. is a step At this time, the heating temperature of the secondary regeneration vessel 21 is preferably performed at a set temperature in the range of 500 to 600° C., and by adding or subtracting within the range of ±30 minutes based on 14 hours at this set temperature.

In the step of obtaining the regenerated material, the first extract contained in the first extract storage container 14 is pumped through the first pressure pump 15 through the first transfer line 18 through the secondary regeneration container ( 21) and then execute.

As described above, the gas vaporized in the heating process of the secondary regeneration vessel 21 flows through the secondary discharge line 27 and is condensed into a renewable raw material as it passes through the secondary heat exchange means 22, and then the recycled raw material is stored. The container 24 is filled.

And, as a result of experimentally confirming the amount of extracted raw material compared to the amount of energy input of the secondary heating means 22 in the step of obtaining the renewable raw material, 4 to 16 wt% with respect to 100 wt% of the primary extract injected into the secondary regeneration container 21 It can be seen that it is effective to carry out until the lower layer solution remains.

In addition, the recycling raw material acquisition step minimizes the generation of waste in the regeneration process by mixing the secondary extract obtained in the secondary extract acquisition step to be described later with the primary extract, thereby reducing the amount of incineration of solid waste and reducing environmental pollution. .

On the other hand, in the secondary extract obtaining step, the lower layer solution remaining after the primary extract injected into the secondary regeneration vessel 21 is vaporized and obtained as a regeneration raw material is filled in the sedimentation layer regeneration vessel 31 and heated again. It is a step of condensing the vaporizing gas to obtain a secondary extract.

To explain the secondary extract acquisition step in more detail, first, during the execution of the renewable raw material acquisition step performed in the secondary regeneration container 21, the lower layer has a relatively large specific gravity due to impurities in the primary and secondary extracts, etc. After filling the buffer container 41 with the solution, the buffer container 41 is separated from the drain line 42 and installed in the tertiary heating means 32 using a moving means (not shown) such as a crane or forklift. The installation work is carried out to perform the function of the sedimentation layer regeneration container 31 for the secondary extract obtaining step.

In this state, the lower layer solution accommodated in the sedimentation layer regeneration container 31 is heated to 550 to 850° C. by the tertiary heating means 32 for 4 to 20 hours, and the vaporizing gas is condensed to obtain the secondary extract. 2 Carry out the step of obtaining the tea extract.

And, as a result of experimentally confirming the secondary extract acquisition step, it was found that it is efficient to carry out until less than 10% by weight of waste remains with respect to 100% by weight of the lower layer solution injected into the sedimentation layer regeneration container 31, It was found that if the waste acrylic to be used did not contain other kinds of foreign substances, it was desirable to carry out until 8% by weight of the waste remained.

As described above, the gas vaporized in the heating process of the sedimentation layer regeneration vessel 31 flows through the tertiary discharge line 37 and is condensed into the secondary extract as it passes through the tertiary heat exchange means 33, and then the secondary It is filled in the extract solution storage container (34).

As such, the secondary extract liquid filled in the secondary extract liquid storage container 34 is recycled to the secondary regeneration container 21 through the secondary transfer line 38 according to the pumping action of the second pressure pump 35 and then regenerated. It is obtained as a renewable raw material through the raw material acquisition stage.

As described above, it was found that 552 kg of liquid recycled raw material was obtained as a result of performing the first extract obtaining step, regenerated raw material obtaining step, and second extracting liquid obtaining step by injecting 600 Kg of waste acrylic, and various wastes such as solid waste for incineration It was confirmed that the separation was approximately 48Kg.

After all, when the recycling system for obtaining acrylic raw materials from waste acrylic according to the first embodiment of the present invention is applied to recycle waste acrylic, 92 wt% of liquid acrylic recycled raw material is obtained and 8 wt% of waste is separated. Compared to the technology in which 15% by weight of waste was generated compared to the input amount of waste acrylic, the amount of waste generated can be reduced by 7% by weight, and thus the efficiency of obtaining recycled raw materials can be increased by 7% by weight.

On the other hand, as a result of implementing the regeneration method using the regeneration system for obtaining the acrylic raw material from the waste acrylic according to the first embodiment of the present invention, the solid waste in the primary regeneration container 11 in which the primary extract obtaining step is performed Compared to the case where the acrylic plate is put in and heated and melted, the primary extract that has already been converted into liquid is put into the secondary regeneration container 21 where the regeneration raw material acquisition step is performed, so the secondary regeneration container 21 is heated at high temperature for a long time. When heated at a high temperature, the color of the liquid regenerated raw material changes from colorless to colored, and the disadvantage of rapidly lowering commercial properties was confirmed.

Accordingly, the regeneration method using a regeneration system for obtaining an acrylic raw material from waste acrylic according to the first embodiment of the present invention was tested while changing various heating temperature and heating time conditions. As a result, the primary regeneration container 11, the secondary regeneration Results for the heating temperature and heating time of the vessel 21 and the sediment layer regeneration vessel 31 were obtained.

More specifically, the conditions of the heating temperature and the heating time include changing the melting and vaporizing heating temperature at intervals of 10° C. in the primary extract liquid obtaining step, the regenerated raw material obtaining step, and the second extract obtaining step, and setting the heating time to 10 Various tests were carried out, changing at minute intervals.

Summarizing the results obtained through the above test, the heating temperature of the regenerated raw material obtaining step is carried out so as to be lower than the heating temperature of the first extract obtaining step as described above in the range of 50 to 100 ° C., and the regenerated raw material obtaining step If the heating time is longer in the range of 1 to 3 hours than the heating time of the first extract obtaining step, the color does not change to colored, but it can be confirmed that the colorless can be maintained to keep the commercial properties constant. In addition, it was confirmed that the heating temperature and heating time of the sedimentation layer regeneration vessel 31 in which the secondary extract obtaining step is performed do not have a special effect on the quality of the regenerated material, but in consideration of the overall process or flow operation, the temperature is 550 to 850 ° C It is preferable to carry out in the range of 4 to 20 hours.

Hereinafter, another embodiment according to the present invention will be described, but detailed descriptions of components similar to those of the above-described first embodiment will be omitted, and components having differences will be mainly described. In addition, in the following other embodiments, as long as it is an employable structure among the components shown in the first embodiment or the components shown in different embodiments, the detailed description or drawings will be omitted as it may be selectively applied.

3 is a view for explaining a regeneration system for obtaining an acrylic raw material from waste acrylic according to a second embodiment of the present invention, and is a schematic diagram showing the main components in a simplified manner to help understanding.

Referring to Figure 3, the regeneration system for obtaining acrylic raw material from waste acrylic according to the second embodiment of the present invention is provided with a basic regeneration unit (1), a raw material regeneration unit (2) and a sedimentation layer regeneration unit (3), , the sedimentation layer regeneration unit (3) is a sedimentation layer regeneration vessel (31), a tertiary heating means (32), a tertiary heat exchange unit (33), a secondary extract storage container (34), and a second pressure pump (35). Constructed, as in the first embodiment described above, by moving the buffer container 41 and installing it on the tertiary heating means 32, there is no need for a pre-preparation work to prepare the sedimentation layer regeneration container, so that the automatic flow operation is performed. It is characterized in that it is configured to be possible.

In addition, the second embodiment of the present invention is a detailed configuration of the basic regeneration unit 1, the raw material regeneration unit 2, and the sedimentation layer regeneration unit 3, which are the same and similar to the first embodiment among the main components. Detailed description of the sedimentation layer regeneration container 31, the tertiary heating means 32, the tertiary heat exchange unit 33, the secondary extract storage container 34, and the second pressure pump 35 is omitted, and the sedimentation layer Among the components provided in the reproducing unit 3, a portion having a differentiation will be mainly described.

The sedimentation layer regeneration unit 3 is provided with a buffer container 51 performing a buffer function, and unlike the buffer container 41 of the first embodiment configured as a separate and movable type (see FIG. 2 ), the secondary regeneration container 21 is It is connected by a drain line 52 in a non-movable structure at the bottom.

And, the sedimentation layer regeneration unit 3 includes a tertiary transfer line 53 installed to supply the secondary extract of the secondary extract storage container 31 to the buffer container 45, a secondary transfer line 38 and A sedimentation bed transfer line connected between the secondary extract liquid control valve part 54 for controlling the flow of the secondary extract liquid flowing to the tertiary transfer line 53, and the buffer container 51 and the sedimentation layer regeneration container 31 (55) and a third pressure-feeding pump (56) installed in the sedimentation bed transfer line (55) is further configured.

The secondary extract liquid control valve unit 54 may be configured in a manner in which a 2-way valve is installed in the secondary transfer line 38 and the tertiary transfer line 53, respectively, but in this embodiment In the example, it is composed of a three-way valve installed at the connection portion of the secondary transfer line 38 and the third transfer line 53 for simplicity and simplification of the structure. Here, the three-way valve is preferably composed of an automatic valve equipped with a driving actuator to enable automatic opening/closing operation when an electric signal is input.

Here, the secondary transfer line 38, the tertiary transfer line 53 and the precipitation layer transfer line 55 may be formed of a metal tube or a synthetic resin tube to satisfy chemical resistance, heat resistance, acid resistance, corrosion resistance, and the like.

The third pressure pump 56 is installed in the sedimentation layer transfer line 55 and is configured to pressurize the secondary extract for dilution mixed with the lower layer solution accommodated in the buffer container 51 to the sedimentation layer regeneration container 31 . It is composed of a slurry pump made of a material that satisfies chemical resistance, heat resistance, acid resistance, and corrosion resistance in consideration of the fact that it has relatively high specific gravity and viscosity and pumps materials containing slurry.

In addition, a stirrer 57 may be installed in the buffer container 51 to effectively mix the secondary extract solution with the lower layer solution, and the drain line 52 has a sedimentation layer control that controls the inflow of the lower layer solution. A valve portion 58 is provided.

Hereinafter, a regeneration method using a regeneration system for obtaining an acrylic raw material from waste acrylic according to a second embodiment of the present invention will be described, but descriptions of the same and similar parts as the regeneration method according to the first embodiment will be omitted.

The regeneration method using a regeneration system for obtaining an acrylic raw material from waste acrylic according to a second embodiment of the present invention includes a primary extract liquid obtaining step of obtaining a primary extract from waste acrylic by the basic regeneration unit (1), a raw material regeneration unit (2) to obtain a regenerated raw material from the primary extract, and a secondary extract to obtain a secondary extract from the primary extract by the sedimentation layer regeneration unit (3). As in the first embodiment, the buffer container is moved and installed on the tertiary heating means, so there is no need for a pre-preparation work to prepare the sedimentation layer regeneration container, so that the secondary extract obtaining step can be performed more smoothly.

More specifically, in the second embodiment, the secondary extract obtaining step includes a sedimentation layer transport line 55 and a third pressure feeding pump 56, so a buffer for accommodating the lower layer solution generated in the regenerated raw material obtaining step Without moving the vessel 51, it can flow directly into the sedimentation layer regeneration vessel 31 through the pumping action of the third pressure pump 56.

Then, by using the third transfer line 53, the secondary extract obtained in the second extract liquid acquisition step is opened and closed by the secondary extract control valve unit 54 (flow to the secondary transfer line 38 is blocked and the third When performing the mixing process of supplying and mixing to the buffer container 51 through the pumping action of the three-way valve so as to flow into the feed line 53) and the second pressure pump 35, the concentration of the precipitation layer solution can be diluted, so that the pumping action by the third pressure pump 56 is possible.

In addition, the above mixing process minimizes the inflow of the secondary extract so that the pumping time of the second pressure pump 35 and the third pressure pump 56 can be shortened and the heating load of the third heating means 32 can be reduced. it is important

Accordingly, as a result of repeating the above mixing process while variously controlling the inflow of the secondary extract, if the input amount of the secondary extract is 5% by weight or more based on the weight of the lower layer solution, the general slurry pump is transferred without overload. I was able to confirm that this is possible. Based on these experimental results, the secondary extract is added in an amount of 5 to 20% by weight, but it is preferable to add the secondary extract to about 15% by weight so that the inflow of the secondary extract is not excessive.

In addition, the secondary extract obtaining step is preferably carried out until 4 to 16% by weight with respect to 100% by weight of the primary extract injected into the secondary regeneration container 21 remains as the lower layer solution.

Although the configuration and operation of a regeneration system for obtaining an acrylic raw material from waste acrylic according to an embodiment of the present invention described above and a regeneration method using the same have been described, these are exemplary and those of ordinary skill in the art can use the present invention It will be understood that it is possible to substitute and modify some of the above-described embodiments without departing from the spirit of the invention.

Therefore, it should be understood that the scope of protection of the present invention extends to the invention described in the claims and their equivalents.

1: Basic regeneration unit 11: Primary regeneration container
12:1 primary heat means 13:1 primary heat exchange part
14: 1st extract storage container 15: 1st pressure pump
2: Raw material recycling unit 21: Secondary recycling container
22: secondary heat means 23: secondary heat exchange unit
24: Recycled material storage container 3: Precipitation layer regeneration unit
31: sedimentation layer regeneration container 32: third heating means
33: 3rd heat exchange part 34: 2nd extract storage container
35: second pressure pump 41, 51: buffer container
42, 52: drain line 43: sedimentation layer control valve part
53: 3rd transfer line 54: 2nd extract control valve part
55: sedimentation layer transfer line 56: third pressure pump

Claims (8)

In the regeneration system for obtaining acrylic raw material from waste acrylic,
a basic regeneration unit having a primary regeneration container into which waste acrylic is put, a primary heating means for melting and vaporizing waste acrylic by heating the primary regeneration container, and generating a primary extract through a condensation process;
A secondary regeneration container into which the primary extract supplied from the basic regeneration unit is put, a secondary heating means for heating the secondary regeneration container to vaporize the primary extract, and to obtain a regeneration raw material through a condensation process raw material recycling unit; and
A sedimentation layer regeneration container in which the lower layer solution precipitated in the lower part of the secondary regeneration container is discharged and accommodated, and a tertiary heating means for heating the sedimentation layer regeneration container to vaporize the lower layer solution; A regeneration system for obtaining an acrylic raw material from waste acrylic, comprising a; a sedimentation layer regeneration unit for recycling the tea extract to the secondary regeneration container.
According to claim 1,
The basic regeneration unit condenses the gas passing through the primary discharge line connected to the primary regeneration vessel to generate the primary extract, a primary heat exchange unit in which the primary extract is accommodated, a primary extract storage container, and the A first pressure-feeding pump for pressurizing the primary extract accommodated in the primary extract storage container to the secondary regeneration container via a primary transfer line,
The raw material regeneration unit comprises a secondary heat exchange unit for generating the recycled raw material by condensing the gas passing through the secondary discharge line connected to the secondary regeneration container, and a recycled raw material storage container in which the recycled raw material is accommodated,
The sedimentation layer regeneration unit includes a tertiary heat exchange unit for condensing gas passing through a tertiary discharge line connected to the sedimentation layer regeneration container to form a secondary extract, a secondary extract storage container in which the secondary extract is accommodated, the A regeneration system for obtaining acrylic raw materials from waste acrylic, characterized in that it further comprises a second pressure pump for pumping the secondary extract from the secondary extract storage container to the secondary regeneration container via a secondary transfer line.
3. The method of claim 2,
The precipitation layer regeneration unit further includes a buffer container connected to the secondary regeneration container by a drain line to discharge the lower layer solution and performing a buffer function, wherein the buffer container is configured to be detachable from the drain line. A regeneration system for obtaining an acrylic raw material from waste acrylic, characterized in that it is disposed in a cooling means for the purpose of the sedimentation layer regeneration container.
3. The method of claim 2,
The sedimentation layer regeneration unit,
a buffer container connected to the secondary regeneration container by a drain line to discharge the lower layer solution and performing a buffer function;
a tertiary transfer line installed to supply the secondary extract of the secondary extract storage container to the buffer container;
a secondary extract control valve unit for controlling the flow of the secondary extract flowing to the secondary transfer line and the tertiary transfer line;
a sedimentation layer transport line connected between the buffer container and the sedimentation layer regeneration container; and
Acrylic raw materials from waste acrylic comprising a; a third pressure pump installed in the sedimentation layer transfer line and pressurize the lower layer solution containing the secondary extract accommodated in the buffer container to the sedimentation layer regeneration container Acquisition playback system.
5. The method of claim 4,
a sedimentation layer control valve unit for controlling the inflow of the lower layer solution into the buffer container; and
A regeneration system for obtaining an acrylic raw material from waste acrylic, characterized in that it further comprises;
In the regeneration method using a regeneration system for obtaining an acrylic raw material from the waste acrylic according to any one of claims 1 to 5,
A primary extract obtaining step of heating the waste acrylic put into the primary regeneration container at 500 to 800° C. for 12 to 14 hours by the primary heating means and condensing the vaporized gas to obtain a primary extract; and
A regeneration raw material obtaining step of heating the secondary regeneration container into which the primary extract is put at 400 to 700° C. for 13 to 15 hours by the secondary heating means, and condensing the vaporized gas to obtain a regeneration raw material; and
Secondary to obtain a secondary extract by heating the sedimentation layer regeneration vessel in which the solution in the lower layer of the secondary regeneration vessel is discharged and accommodated at 550 to 850° C. for 4 to 20 hours by the tertiary heating means and condensing the vaporizing gas Including the step of obtaining the extract,
The regeneration raw material obtaining step is a regeneration method using a regeneration system for obtaining acrylic raw materials from waste acrylic, characterized in that the secondary extract obtained in the primary extract obtaining step is mixed with the primary extract.
7. The method of claim 6,
The second extract obtaining step further comprises a mixing process of mixing the second extract with the lower layer solution generated in the reclaimed raw material obtaining step. Regeneration method using a regeneration system for obtaining acrylic raw materials from waste acrylic .
8. The method of claim 7,
The mixing process is carried out by introducing the secondary extract in an amount of 5 to 20% by weight based on the weight of the lower layer solution,
The regenerated raw material obtaining step is performed until 4 to 16 wt% with respect to 100 wt% of the first extract put into the secondary regeneration container remains as the lower layer solution, while the heating temperature of the regenerated raw material obtaining step is It is carried out so that the temperature is lower in the range of 50 to 100 ° C than the heating temperature of the first extract obtaining step, and the heating time of the regenerated raw material obtaining step is longer than the heating time of the first extract obtaining step in the range of 1 to 3 hours. A regeneration method using a regeneration system to obtain an acrylic raw material from waste acrylic, characterized in that it is carried out by

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