KR20210136681A - Device and method for chlorine removal from residue of waste plastic pyrolysis - Google Patents

Abstract

The present invention relates to a technology for reducing the amount of landfill treatment by separating the pyrolysis residues generated in the process of producing renewable fuel oil from plastic or vinyl wastes into recyclable and landfill, and more particularly, pyrolysis residues It is about an apparatus and method for removing chlorine present in the air and selecting materials with high application potential by using physical properties such as specific gravity and particle size. To this end, in the apparatus for removing chlorine from the pyrolysis residue of combustible waste, the mixing tank 130 for mixing the residue and water; and a stationary tank 140 connected to the mixing tank 130 and separating the residue into a floating residue 155 and a sedimentation residue 165; including, to remove chlorine from the residue by the water Chlorine removal device from pyrolysis residues of combustible waste, characterized in that

Description

Device and method for chlorine removal from residue of waste plastic pyrolysis

The present invention relates to a technology for reducing the amount of landfill treatment by separating the pyrolysis residues generated in the process of producing renewable fuel oil from plastic or vinyl wastes into recyclable and landfill, and more particularly, pyrolysis residues It is about an apparatus and method for removing chlorine present in the air and selecting materials with high application potential by using physical properties such as specific gravity and particle size.

With the development of the industry, the production of products using plastics or synthetic rubber as raw materials is rapidly increasing, but the recycling rate of waste synthetic resins such as waste plastics and rubber is only insignificant compared to the total amount generated. The main cause of this phenomenon is that it takes a lot of cost to recycle waste synthetic resin. The recycling of waste synthetic resin costs a lot for various reasons, but the main reason is that the waste synthetic resin contains various substances. That is, the waste synthetic resin can be easily recycled when it is in a clean state because there are few foreign substances, but in the case of a low-grade product with a lot of foreign substances, a lot of cost is consumed for recycling. Therefore, it is not good in economic terms, and there is a limit to recycling due to the possibility of secondary contamination in the recycling process.

As a technology for recycling waste synthetic resins while reducing costs, there is a method of thermally decomposing waste synthetic resins. The pyrolysis recycling method of waste synthetic resin is a technology to melt and decompose waste synthetic resin by applying high heat to waste synthetic resin, to purify various oils obtained from the decomposition product to obtain oil, and to make a solid residue.

Recently, as waste synthetic resin treatment technology by pyrolysis emulsification technology is known as a treatment technology that can secure economic feasibility, the number of local governments that want to install emulsification facilities to treat waste synthetic resin is increasing. However, pyrolysis residues cannot be found and are currently being completely disposed of in landfills.

It is known that the amount of such solid residues generated is about 20% of the weight of the input waste synthetic resin, and it is recognized as a major factor causing difficulties in the management of pyrolysis and emulsification plants due to the recent increase in landfill treatment costs. To overcome this, the possibility of using it in cement factories or brick factories was reviewed, but it is difficult to use it in these factories because of the low calorific value of the residue and the presence of chlorine in a high ratio of 2% or more. Therefore, in order to increase the utility of the residue, it is suggested as a prerequisite to lower the chlorine component present in the residue and increase the calorific value, and its importance is gradually increasing.

1. Japanese Patent Laid-Open No. 2001-323283 (Method for recovering oil from waste plastics); 2. Korean Patent Laid-Open No. 10-2010-0125568 (Apparatus and method for continuously obtaining high-grade oil from waste synthetic resin using a rotary kiln-type pyrolysis device), 3. Korean Patent Publication No. 10-2013-0038634 (energy-saving multi-stage rotary kiln), 4. Korean Patent Registration No. 10-1478528 (Device and method for removing chlorine from high-boiling decomposition products produced by thermal decomposition of waste synthetic resins).

The present invention has been devised to solve the above problems, and an object of the present invention is to remove chlorine present in the residue so that a part of the residue generated in the pyrolysis and emulsification facility of waste synthetic resin can be utilized in industrial processes and At the same time, it is to provide an apparatus and method for removing chlorine from pyrolysis residues of combustible wastes that select only residues with a high combustible carbon content.

However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

An object of the present invention is to provide an apparatus for removing chlorine from pyrolysis residues of combustible waste, comprising: a mixing tank 130 for mixing the residue with water; and a stationary tank 140 connected to the mixing tank 130 and separating the residue into a floating residue 155 and a sedimentation residue 165; including, to remove chlorine from the residue by the water It can be achieved by a chlorine removal device from the pyrolysis residue of combustible waste, characterized in that.

In addition, a sieving tank 110 is further provided at the front end of the mixing tank 130 , and the fine residues 132 separated by the sieving tank 110 may be introduced into the mixing tank 130 .

In addition, the mixing tank 130 is further provided with a stirrer 135 for mixing the residue and water.

In addition, the stationary tank 140 has an inclined lower portion 144 inclined in one direction, and the sedimentation residue 165 may be separated along the inclined lower portion 144 .

In addition, the stationary tank 140 further includes at least one partition wall 142 dividing the interior into a plurality of regions, and the lower portion of the partition wall 142 is spaced apart from the inclined lower portion 144 .

In addition, a dehydration device 160 connected to the rear end of the stationary tank 140 and separating water from the sedimentation residue 165 is further provided.

In addition, the mixing tank 130 may further include a water supply tank 180 for supplying the water, and the water dehydrated in the dehydration device 160 may be supplied to the water supply tank 180 through the recovery pipe 167 . have.

And, the water supply tank 180 is further provided with a supplementary water storage tank 185 for replenishing insufficient water from the outside.

An object of the present invention as described above, as another category, in a method for removing chlorine from pyrolysis residues of combustible waste, the steps of mixing the residue and water in the mixing tank 130 (S120); and separating the residues into the floating residues 155 and the sedimentation residues 165 in the stationary tank 140 (S130). This can be achieved by chlorine removal from pyrolysis residues of waste.

In addition, before the mixing step (S120), the sieving tank 110 further includes a step (S110) of separating the residue into a coarse residue 125 and a fine residue 132, and the fine residue 132 may be added to the mixing tank 130 .

In addition, a dehydration step (S140) in which the dehydration device 160 separates water from the sedimentation residue 165; may further include.

The water dehydrated in the dehydration step ( S140 ) may be supplied to the water supply tank 180 through the recovery pipe 167 .

According to the present invention, by washing the residue generated in the pyrolysis and emulsification facility of the waste synthetic resin with water and collecting only the floating residue, the chlorine content of the recovered residue is lowered and the calorific value increases, so that the industrial utility value can be increased. For this reason, the recovered residue can be used in a cement process or a brick factory, etc., thereby increasing economic efficiency and recycling rate of resources.

However, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

The following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention to be described later, so the present invention is a matter described in such drawings It should not be construed as being limited only to
1 is a schematic configuration diagram of an apparatus for removing chlorine from pyrolysis residues of combustible waste according to an embodiment of the present invention;
2 is a schematic flowchart of a method for removing chlorine from pyrolysis residues of combustible waste according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component. When a component is referred to as being “connected” to another component, it may be directly connected to the other component, but it should be understood that other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. Meanwhile, other expressions describing the relationship between elements, that is, “between” and “immediately between” or “neighboring to” and “directly adjacent to”, etc., should be interpreted similarly.

The singular expression is to be understood as including the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the described feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Terms defined in the dictionary should be interpreted as being consistent with the meaning of the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

chlorine removal

Hereinafter, the feasibility of chlorine removal from pyrolysis residues of combustible wastes will be explained. First, industrial analysis and elemental analysis of the residue were performed to understand the characteristics of the residue. From the analysis results shown in [Table 1], it can be seen that the residue contains a lot of ash components, and the pyrolysis reaction does not completely occur, so there are many volatiles.

Industry analysis (wt%) Elemental analysis (wt%) Moisture (M) Volatile (VM) Ash Fixed carbon (F.C) carbon (C) Hydrogen (H) Nitrogen (N) 1.63 23.63 45.43 29.31 51.59 3.30 1.33 Analysis conditions: Industrial analysis is based on arrival samples and elemental analysis is based on dry samples.
Analysis method: Ministry of Environment Notice No. 2014-135: Quality test method for solid fuel products
Analysis device: TGA-701 Proximate Analyzer (LECO Co,, USA)
TruSpec Elemental Analyzer (LECO Co,, USA)

In order to understand the characteristics of the pyrolysis residue, it was first screened according to the size of the particles and shown in [Table 2]. As shown in [Table 2], it can be seen that the particle size of the residue is widely distributed from 2 mm or more to 0.3 mm or less.

Classification (diameter, mm) D 2.0 ~
(over) D 1.0 to 2.0 D 0.5 to 1.0 D 0.3 to 0.5 D ~ 0.3
(under) Weight ratio (%) 10.9 28.0 28.4 14.2 18.5

The chlorine component present in the residue was analyzed using ion chromatography. The analysis method is to completely combust the sample at 1,100°C and collect the generated gas as a liquid for analysis. [Table 3] shows the chlorine content according to the shape of the residue, and it can be seen that the chlorine content is higher than 3%.

sample type particle phase powder phase Cl content (wt%) 3.65 3.81 The analysis was performed using a Metrohm Ion Chromatograph (IC) equipped with a MITSUBISHI Combustion module.
This is the result of analysis using
- Column: Shodex IC anion column (4.0 mm × 250 mm, 9 ㎛)
- Eluent : 1 mM Na ₂ CO ₃ + 4 mM NaHCO ₃ , - Flow rate : 1.0 mL/min

Chlorine present in the residues impedes the industrial use of the residues and must be removed. It was determined that chlorine present in the residue was bound to hydrocarbons, and a thermogravimetric analyzer (TGA) was used to measure the decomposition behavior of chlorine and hydrocarbons. As a result of carrying out experiments in an oxidizing atmosphere and a nitrogen atmosphere, respectively, rapid weight loss was measured at 330 °C, 460 °C, and 580 °C. Based on this result, residual chlorine in the residue obtained after heat-treating the particulate residue at a heating rate of 10°C/min at 300°C, 500°C, and 600°C for 1 hour was measured and shown in [Table 4]. As shown in [Table 4], it can be confirmed that the chlorine component is slightly removed when the residue is heat treated, but it can be seen that a large amount of the chlorine component is still remaining.

heat treatment conditions
(nitrogen atmosphere) 300℃, 1hr 500℃, 1hr 600℃, 1hr Cl content (wt%) 2.65 3.07 2.90

As shown in [Table 1], the residue contained ash in a high ratio, so it was analyzed using EDAX to identify the components. Even if the error according to the measurement site is taken into account, the metal components contained in the residue are mainly Ca, Ti, Si, Cl, Al, Na, Mg, K, Fe, etc. The ratio of the components is shown in [Table 5]. As shown in [Table 5], the content of iron (Fe) in the residue is very low. Therefore, it can be seen that magnetic sorting of the residue is not effective as a method for increasing the utilization value of the residue.

Ingredients particle size of the residue 0.3 mm or less in diameter 0.3 to 0.5 mm in diameter 0.5 to 1.0 mm in diameter Ca 1.75 1.31 1.07 Ti 1.34 1.15 0.91 Si 0.84 0.56 1.38 Cl 0.93 1.05 0.74 Al 0.43 0.41 0.37 Na 0.31 0.38 0.19 Mg 0.21 0.12 0.73 K 0 0.10 0.10 Fe 0.09 0.12 0.21 C 73.9 75.1 75.4 O 20.2 19.7 18.9

On the other hand, as shown in [Table 5], by washing the residue with water paying attention to the compositional distribution of metal components present in the residue, some metal components and chlorine present in the residue can be removed, thereby increasing the utility value of the residue. have.

Residues selected according to the size of particles through a sieve were put into the mixing tank and stirred, and then the stirring was stopped. . As the specific gravity of the residues was clearly distinguished from those that were heavier than water and those that were lighter than water, it was possible to easily select the residues using the difference in specific gravity with respect to water.

[Table 6] shows the distribution of the residues selected by the difference in specific gravity by putting the residues selected according to size into the mixing tank. It was found that the proportion of particles having a specific gravity lighter than water was very high when the size of the residue was larger than 0.5 mm, while the proportion of particles having a specific gravity smaller than 0.3 mm was very high.

size of residue 0.3 mm or less in diameter 0.3-0.5 mm in diameter 0.5 to 1.0 mm in diameter Percentage of suspended residues (%) 75.0 58.3 47.9 Proportion of precipitated residue (%) 25.0 41.7 52.1

As it was confirmed that the residues can be easily selected due to the large difference in specific gravity with respect to water, the characteristic change of each of the selected residues was measured.

In order to become a residue that can be used as a heat source in an industrial process, the calorific value is very important. The calorific value of each of the suspended and precipitated residues was measured and compared. [Table 7] shows the calorific value of each residue, and it was confirmed that the calorific value of the suspended residue as it has a lighter specific gravity than water was improved by about 20% compared to the precipitated residue.

sample form
(0.3 to 0.5 mm in diameter) floating residue precipitated residue calorific value
(Kcal/Kg) 5,960 5,040

If the chlorine content of the residue is more than 2%, it is known that it is difficult to use it as a heat source for industrial processes. And the present invention is to remove the residue by washing with water, paying attention to the distribution of metal components present in the residue. That is, Na and Cl components, which are expected to be attached to the residue in the form of salt, are washed with water to dissolve, and the suspended residue is recovered to remove chlorine.

Residues selected with a particle size of 0.3 mm or less are placed in a mixing tank and washed with water by stirring. The metal components present in the residue before and after washing with water were analyzed using XRF, and the results are shown in [Table 8]. As can be seen in [Table 8], the chlorine (Cl) component was reduced by about 88%, and the sodium (Na) component was reduced by more than 90%.

C&O Ca Cl Ti Al Si Na Fe K ... before washing
(Wt%) 82.9 3.68 2.22 2.18 1.11 0.95 0.73 0.44 0.19 after washing
(Wt%) 85.2 4.52 0.49 3.81 1.58 1.40 0.05 0.56 0.14

configuration of the embodiment

Hereinafter, the configuration of the chlorine removal device from the pyrolysis residue of combustible waste according to an embodiment of the present invention will be described in detail. 1 is a schematic configuration diagram of an apparatus for removing chlorine from pyrolysis residues of combustible waste according to an embodiment of the present invention. 1, the residue storage tank 100 temporarily stores the residue discharged from the pyrolysis and emulsification facility of the waste synthetic resin.

The sieving tank 110 is connected to the rear end of the residue storage tank 100, and a screen 115 is installed therein. The sieving tank 110 passes residues of a certain size (eg, diameter 1 mm) or less among the input residues to separate them into fine residues 132 , and separates large-sized residues into coarse residues 125 . do.

The coarse residue storage tank 120 is connected to the rear end of the sieving tank 110 to collect and store the coarse residues 125 that do not pass through the screen 115 . A detailed mechanical device (such as a conveyor or a transfer screw) or configuration for collection is a conventional configuration, so a description thereof will be omitted.

The mixing tank 130 is installed between the sieving tank 110 and the stationary tank 140, and is a component in which the chlorine component in the residue is washed while the fine residue 132 and water are mixed. To this end, a stirrer 135 (eg, a stirring motor and a stirring blade, etc.) is further provided in the mixing tank 130 .

The stationary tank 140 is installed between the mixing tank 130 and the dehydration device 160, and is a component that separates the floating residue 155 and the sedimentation residue 165 by using the difference in specific gravity. The interior of the stationary tank 140 is partitioned by a plurality of partition walls 142 , so that only water and floating residues 155 can cross the partition wall 142 . The lower portion of the partition wall 142 is spaced apart from the inclined lower portion 144, and serves as a passage through which the sedimentation residue 165 can move.

The lower surface of the stationary tank 140 forms an inclined lower part 144 . The inclined lower part 144 forms a descending slope in one direction (eg, the flow direction) so that the sedimentation residue 165 naturally moves and gathers to one side.

The floating residue storage tank 150 is connected to the upper part of the rear end of the stationary tank 140 , and is accommodated by moving the floating residue 155 floating on the water.

The dewatering device 160 is connected to the lower portion of the rear end of the stationary tank 140 , and the sedimentation residue 165 that has sunk under the water is moved and accommodated. A centrifugal separator may be applied to the dehydration device 160 to separate water and the sedimentation residue 165 .

The sedimentation residue storage tank 170 collects and stores the sedimentation residue 165 separated from water in the dehydration device 160 .

The recovery pipe 167 is installed between the dewatering device 160 and the water supply tank 180 to send the water discharged due to dehydration back to the water supply tank 180 . Since the water discharged from the dehydrator 160 contains salt at a low concentration, it may be recovered and used in the water supply tank 180 or discharged.

The water supply tank 180 is a device for supplying water required by the mixing tank 130 , and a water supply pipe 187 extends to the mixing tank 130 .

The make-up water storage tank 185 is a tank that receives and stores water from an external water source (eg, tap water, industrial water, rivers, etc.) when circulating water is insufficient and replenishment is required.

operation of the embodiment

Hereinafter, the operation of the chlorine removal device having the above configuration will be described in detail with reference to the accompanying drawings. 2 is a schematic flowchart of a method for removing chlorine from pyrolysis residues of combustible waste according to an embodiment of the present invention. As shown in FIG. 2 , the residue discharged from the pyrolysis and emulsification facility of the waste synthetic resin is once stored in the residue storage tank 100 .

Then, it is put into the sieve tank 110 . The sieving tank 110 separates the residue into a coarse residue 125 and a fine residue 132 using the screen 115 (S110). The coarse residue 125 of a certain size or more is transferred to the coarse residue storage tank 120 , and the fine residue 132 passing through the screen 115 is introduced into the mixing tank 130 .

The fine residue 132 and water are mixed in the mixing tank 130 (S120). Water is supplied from the water supply tank 180 into the mixing tank 130 through the water supply pipe 187 , and the stirrer 135 promotes uniform stirring of water and residues. Thereby, the chlorine component in the residue is sufficiently dissolved in water to achieve dechlorination.

Next, the residue is separated into a floating residue 155 and a sedimentation residue 165 in the stationary tank 140 (S130). That is, water and floating residues 155 gather at the rear end of the stationary tank 140 while slowly crossing the partition wall 142 inside the stationary tank 140 , and the sedimentation residue 165 flows down the inclined lower part 144 . It gathers at the rear end of the inclined lower part 144 .

Then, the floating residue 155 is collected into the floating residue storage tank 150 , and the sedimentation residue 165 is collected by the dehydrating device 160 . The dehydration device 160 separates water from the sedimentation residue 165 (S140). At this time, the water separated by dehydration may be discharged or supplied to the water supply tank 180 through the recovery pipe 167 . And, the dehydrated sedimentation residue 165 is collected in the sedimentation residue storage tank 170 .

The water supply tank 180 receives and stores water from the make-up water storage tank 185 or the dehydration device 160, and supplies water to the mixing tank 130 when necessary. This allows water to be recycled.

As described above, the chlorine component present in the residue can be removed through the process of first screening and washing with water by utilizing the difference in hydrophobicity and specific gravity with respect to water of the residue. Accordingly, it is possible to further increase the utilization value of the residue.

The detailed description of the preferred embodiments of the present invention disclosed as described above is provided to enable any person skilled in the art to make and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, those skilled in the art can use each configuration described in the above-described embodiments in a way in combination with each other. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that are not explicitly cited in the claims may be combined to form an embodiment, or may be included as new claims by amendment after filing.

100: residue storage tank,
110: Sieve Reumjo,
115: screen,
120: coarse residue storage tank,
125: coarse residue,
130: mixing tank;
132: fine residue,
135: agitator;
140: political group,
142: bulkhead,
144: inclined lower part,
150: floating residue storage tank,
155: floating residue,
160: dehydration device,
165: sedimentation residue,
167: recovery pipe,
170: sedimentation residue storage tank,
180: water tank,
185: make-up water storage tank,
187: water pipe.

Claims (13)

An apparatus for removing chlorine from pyrolysis residues of combustible waste, comprising:
a mixing tank 130 for mixing the residue and water; and
A stationary tank 140 connected to the mixing tank 130 and separating the residue into a floating residue 155 and a sedimentation residue 165; including,
An apparatus for removing chlorine from pyrolysis residues of combustible wastes, characterized in that chlorine is removed from the residues by the water. The method of claim 1,
A sieve tank 110 is further provided at the front end of the mixing tank 130,
An apparatus for removing chlorine from pyrolysis residues of combustible waste, characterized in that the fine residues 132 separated by the sieving tank 110 are introduced into the mixing tank 130 . The method of claim 1,
An apparatus for removing chlorine from pyrolysis residues of combustible waste, characterized in that the mixing tank 130 further includes a stirrer 135 for mixing the residue with the water. The method of claim 1,
The stationary tank 140 has an inclined lower part 144 inclined in one direction,
The settling residue 165 is a device for removing chlorine from the pyrolysis residue of combustible waste, characterized in that separated along the inclined lower portion (144). The method of claim 1,
The stationary tank (140) is an apparatus for removing chlorine from pyrolysis residues of combustible waste, characterized in that it further includes at least one partition wall (142) dividing the interior into a plurality of regions. 6. The method of claim 5,
A device for removing chlorine from pyrolysis residues of combustible waste, characterized in that the lower portion of the partition wall (142) is spaced apart from the inclined lower portion (144). The method of claim 1,
A device for removing chlorine from the pyrolysis residue of combustible waste, which is connected to the rear end of the stationary tank (140) and further includes a dehydration device (160) for separating water from the sedimentation residue (165). 8. The method of claim 7,
The mixing tank 130 further includes a water supply tank 180 for supplying the water,
Device for removing chlorine from pyrolysis residues of combustible waste, characterized in that the water dehydrated in the dewatering device (160) is supplied to the water supply tank (180) through a recovery pipe (167). 9. The method of claim 8,
The water supply tank 180 is an apparatus for removing chlorine from pyrolysis residues of combustible waste, characterized in that the supplementary water storage tank 185 for supplementing insufficient water from the outside is further provided. A method for removing chlorine from pyrolysis residues of combustible waste, the method comprising:
mixing the residue and water in the mixing tank 130 (S120); and
Including a; separating the residue into a floating residue 155 and a sedimentation residue 165 in the stationary tank 140 (S130);
A method for removing chlorine from pyrolysis residues of combustible wastes, characterized in that chlorine is removed from the residues with the water. 11. The method of claim 10,
Before the mixing step (S120),
The sieving tank 110 further includes a step (S110) of separating the residue into a coarse residue 125 and a fine residue 132,
A method of removing chlorine from pyrolysis residues of combustible waste, characterized in that the fine residue 132 is put into the mixing tank 130 . 11. The method of claim 10,
A method of removing chlorine from pyrolysis residues of combustible waste, characterized in that it further comprises a dehydration step (S140) in which the dehydration device 160 separates water from the sedimentation residue 165. 13. The method of claim 12,
A method for removing chlorine from pyrolysis residues of combustible waste, characterized in that the water dehydrated in the dehydration step (S140) is supplied to the water supply tank 180 through a recovery pipe 167.

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