KR101041055B1 - A method for refused plastics fuel of sludge with melting by products obtained by thermoplastic macromolecular compounds - Google Patents

Abstract

The present invention relates to a sludge fuelization method using molten byproducts of thermoplastic polymer compounds. Sludge fuelization method using the molten by-product of the thermoplastic polymer compound according to an embodiment of the present invention, a sludge pretreatment process for preparing pretreated sludge so that the particle size of the raw sludge is uniform, removing foreign matter contained in the thermoplastic polymer compound and crushing or pulverizing A thermoplastic polymer compound pretreatment step, a pre-treatment of the thermoplastic polymer compound is added to the melting tank and heated to produce a high temperature liquid material, and the sludge solid fuel is produced by reacting the pretreated sludge and the high temperature liquid material A sludge fuelization process is included. As a result, it is possible to increase the recycling rate of various sludges and thermoplastic polymer compounds and to utilize them as sludge solid fuels.

Thermoplastics, polymer compounds, sludge, liquid materials, flue gases, solid fuels,

Description

Sludge fueling method using molten by-product of thermoplastic polymer compound {A METHOD FOR REFUSED PLASTICS FUEL OF SLUDGE WITH MELTING BY PRODUCTS OBTAINED BY THERMOPLASTIC MACROMOLECULAR COMPOUNDS}

The present invention relates to a sludge fuelization method using molten by-products of a thermoplastic polymer compound, and more particularly, a thermoplastic polymer for fueling sludge using various sludges and thermoplastic polymer compounds such as sewage sludge, food sludge, and organic sludge of livestock waste sludge. A method of sludge fueling using molten byproducts of a compound.

Domestic sewage sludge production amounted to 2,557,374 tons / year as of the end of 2005. Domestic sewage sludge generation and treatment status are shown in Table 1 below.

year Marine emissions Landfill Incineration recycle system 2005 199 (78.0%) 4 (1.7%) 29 (11.2%) 12 (4.8) 256 (million tons / year)

As of the end of 2005, about 256 million tons of sewage sludge were generated annually, of which 78% were marine discharges and 1.7% were landfilled. However, since marine discharges have been banned since 2012, an environment-friendly alternative to incineration is needed.

At present, the sewage sludge treatment method is largely divided into four types, and the treatment costs paid are shown in Table 2 below.

[Sewage Sludge Treatment Cost] Ocean discharge Landfill incineration Recycling (Cement) 26,000 won / ton 27,000 (won / ton) 55,000 (KRW / ton) 48,000 won / ton

As shown in Table 2, it can be seen that the annual cost of treating sewage sludge is enormous.

Conventional sludge drying is mainly done by using hot air, and it is difficult to apply the site due to the energy cost required for drying. In addition, the sludge generated after drying should be subjected to secondary treatment such as landfilling or recycling at a water content of around 20 to 40%.

Currently, technology development is being developed to produce organic sludge as energy, but oil-on-water dehydration drying feed uses oil as a heat medium to maintain high temperature under reduced pressure (to prevent deterioration of oil) so that moisture is less than 6%. In order to remove oil from the dried raw material, the dried raw material is de-oiled through a centrifugal separator or an extrusion press, and the like is used as a feed by pulverizing and selecting it. However, in the prior art oil temperature drying method, the dried sludge is difficult to store and transfer to other areas because waste oil is on the outside.

Meanwhile, polymer compounds are widely used in our daily lives such as tires, adhesives, soaps, PVC, nylon, synthetic rubber, liquid crystal monitors, and plastics. Especially thermoplastic polymer compounds

Korea is the fourth largest producer of thermoplastic polymers in the world after the United States, Japan, and Germany, producing about 10 million tons / year, about 6% of the world's production of thermoplastic polymers. About 4 million tons of thermoplastic polymer compounds are generated annually, which is 14% of the total amount of 29 million tons / year generated.

The amount of thermoplastic polymer compound produced in Korea increases at an average rate of 6.5% every year, and it is expected that about 5.7 million tons of thermoplastic polymer compound will be generated in 2010. The increase rate was the highest at 8.1%.

In rural areas, about 100,000 tons of waste vinyl is used to grow horticultural crops each year, and the amount of untreated waste vinyl is known to be over 1 million tons. In addition, waste fishes such as PE, PP, EPS, synthetic fibers, etc. dumped in offshore waters are estimated to be about 40,000 tons per year.

In 2004, 1.3 million tons of recycled thermoplastic polymers were recycled out of the 3.93 million tons of thermoplastic polymers, and the recycling rate was 30.9%. This figure is relatively low compared to OECD countries. .

The recycling technology of thermoplastic polymer compound developed until now is largely recycled raw material, thermal recycling or incineration to recover thermal energy of thermoplastic polymer compound, and raw material or liquid through chemical treatment. And chemical recycle converting into solid fuel.

Therefore, there is an urgent need to develop technologies for alternative energy conversion of sludge and thermoplastic polymer compounds, which are by-products of landfilling, ocean discharge, and surplus by-products.

Accordingly, an object of the present invention is to provide a sludge fueling method using melt by-products of thermoplastic polymer compounds which can simultaneously increase the recycling rate of various sludges and thermoplastic polymer compounds that are currently landfilled, incinerated, and discharged from the ocean.

Another problem to be solved by the present invention is to provide a sludge fuelization method using the molten by-product of the thermoplastic polymer compound to dry the sludge by using the exhaust gas generated during the melting of the thermoplastic polymer compound in order to minimize the energy cost of the sludge drying. have.

Technical problem of the present invention is not limited to the technical problems mentioned above, other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

Sludge fuelization method using the melt by-product of the thermoplastic polymer compound according to an embodiment of the present invention for solving these technical problems is included in the sludge pretreatment process, the thermoplastic polymer compound to prepare the pretreated sludge to uniform particle diameter A thermoplastic polymer compound pretreatment step of removing foreign material, crushing or pulverizing, a melting process of adding the pretreated thermoplastic polymer compound to a melting tank and heating it to produce a high temperature liquid material, and the pretreated sludge and the high temperature liquid material. And a sludge fuelization process for reacting the sludge to produce sludge solid fuel.

The melting process may be melted for 3 to 4 hours at 200 to 350 ℃.

The sludge fuelization process may be reacted for 20 to 40 minutes at 80 to 120 ℃.

The sludge fuelization process may include 100 parts by weight of the pretreated sludge and 30 to 50 parts by weight of the liquid material.

The thermoplastic polymer compound is polystyrene, ethylene vinyl acetate copolymer, ethyl ethylene acrylate copolymer, polypropylene, acrylonitrile-butadiene-styrene copolymer, acrylonitrile-styrene copolymer, methyl methacrylate, vinyl chloride vinyl chloride Copolymer, vinyl acetate maleic acid copolymer, vinyl chloride acetate copolymer, vinylidene chloride copolymer, vinylidene chloride copolymer, vinyl acrylonitrile copolymer, ethylene vinyl chloride copolymer, propylene vinyl chloride copolymer, vinyl acetate, poly Vinyl alcohol, polyamide, polyacetal, polyester, polycarbonate, polysulfone, polyetherimide, polyamideimide and polyphenylene sulfide, or a copolymer of two or more thereof.

In the sludge fuelization method using the melt by-product of the thermoplastic polymer compound according to another embodiment of the present invention, the sludge drying of the pretreated sludge and the exhaust gas generated during the melting of the thermoplastic polymer compound between the melting process and the sludge fuelization process. The sludge drying process may further include a sludge drying process for preparing a dry sludge by evaporating water contained in the pretreated sludge into the apparatus, wherein the pretreated sludge may be the dry sludge.

The sludge drying process may be hot air dried for 20 to 40 minutes at 120 to 200 ℃.

As described above, according to the sludge fuelization method using the molten by-product of the thermoplastic polymer compound according to the embodiment of the present invention, there is an effect of increasing the recycling rate by producing sludge solid fuel using various sludges and the thermoplastic polymer compound.

In addition, according to the sludge fuelization method using the molten by-product of the thermoplastic polymer compound according to an embodiment of the present invention, various land sludges and land discharged sludges are converted into sludge solid fuel, thereby reducing energy replacement and sludge treatment costs. .

In addition, according to the sludge fuelization method using the molten by-product of the thermoplastic polymer compound according to an embodiment of the present invention can improve the efficiency and reliability in terms of waste treatment and energy recovery, it is currently landfill, marine discharge Energy efficiency of surplus by-products and high efficiency clean waste treatment technology can be secured.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

First, a sludge fuelization method using melt byproducts of a thermoplastic polymer compound according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 1.

1 is a process diagram of a sludge fuelization method using melt byproducts of a thermoplastic polymer compound according to an exemplary embodiment of the present invention.

As shown in Figure 1, the sludge fuelization method using the melt by-product of the thermoplastic polymer compound according to an embodiment of the present invention is largely sludge pretreatment step (S100), thermoplastic polymer compound pretreatment step (S200), melting step (S300) And it may include a sludge fuelization process (S400).

Hereinafter, the characteristics of each process will be described.

First, the sludge pretreatment step (S100) will be described.

The sludge pretreatment step (S100) is a process of uniformizing the particle diameter of various raw sludges, and can finely crush or grind the raw sludge into a size of about 5 to 30 mm with a crusher. Here, the raw sludge used in the present invention may be used not only organic sludge but also waste sludge generated from sewage treatment plants, industrial wastewater treatment plants, livestock manure, and the like. The pretreated sludge may thus contain about 60 to 70% by weight of moisture.

Next, the thermoplastic polymer compound pretreatment step (S200) will be described.

The thermoplastic polymer compound pretreatment step (S200) is a step of removing metals and the like contained in various thermoplastic polymer compounds. The thermoplastic polymer compound used herein is polystyrene, ethylene vinyl acetate copolymer, ethyl ethylene acrylate copolymer, polypropylene, acrylonitrile-butadiene-styrene copolymer, acrylonitrile-styrene copolymer, methyl methacrylate, vinyl chloride chloride Vinyl acetate copolymer, vinyl vinyl acetate maleic acid copolymer, vinyl chloride acetate vinyl copolymer, vinylidene chloride vinyl chloride, vinyl acrylonitrile chloride copolymer, ethylene vinyl chloride copolymer, propylene vinyl chloride copolymer, vinyl acetate , Polyvinyl alcohol, polyamide, polyacetal, polyester, polycarbonate, polysulfone, polyetherimide, polyamideimide and polyphenylene sulfide are used. Such thermoplastic polymer compounds are resins which can be plasticized to the extent that they can be molded by heating, and can be used for extrusion molding and injection molding.

The thermoplastic polymer compound is removed using a crusher, magnetic screening, screening, and, if necessary, a pretreatment device such as a wind separator to remove foreign substances such as metals. In the case of a thermoplastic polymer compound in which foreign substances such as metals are not mixed, a pretreatment step (S200) is not required, but a particle size control crushing or grinding process may be required to increase efficiency in the melting step (S300) described later. In this case, the thermoplastic polymer compound may be finely crushed or pulverized to a size of about 5 to 30 mm with a crusher.

Next, the melting step (S300) will be described.

Melting step (S300) is a step of injecting the pretreated thermoplastic polymer compound into the melting tank and heating the melting tank to about 200 to 350 ℃ using an electric heater, heat medium oil, direct heat or hot air.

In the melting step (S300), the thermoplastic polymer compound finely ground by the thermoplastic polymer compound pretreatment step (S200) is supplied to the melting tank. In this case, a device mainly used as a supply device may use a screw conveyor or a rotary valve, or a combination thereof. In addition to this, a piston (Piston) -type input device may be used, but since it is a known technology, a detailed description thereof will be omitted.

When the thermoplastic polymer compound is added to the melting bath and heated, the solid state is changed into a liquid state. That is, when the heat is applied to the thermoplastic polymer compound at about 100 to 200 ° C., the melt melts. When the heat is applied at about 200 to 350 ° C., the polymer chain is broken and changed into a low molecular material. Melting baths may be used with stirred tanks and the thermoplastic polymer compound supplied is liquefied during residence time to ensure sufficient fluidity.

As the heating method of the melting tank, various methods such as heating by an electric heater, heating by heat medium oil, heating by direct heating or hot air, heating by high temperature liquid circulated from the reactor, and the like can be used. At this time, the residue of the thermoplastic polymer compound remaining in the melting tank is discharged to the outside.

On the other hand, since the decomposition temperature and decomposition rate of the thermoplastic polymer compound varies depending on the type, the composition of the liquid substance changes with time when thermally decomposing raw materials mixed with various types of thermoplastic polymer compounds, which is the subsequent sludge fuelization process ( S400) may affect the recovery of dry sludge of uniform quality. Therefore, the temperature of the molten bath is a very important factor to be considered in the plant operation and has a significant influence on the reaction time and the heating temperature. The reaction time according to the present invention is 3 to 4 hours, the heating temperature is preferably in the range of about 200 to 350 ℃. The reaction time varies slightly depending on the type of the compound, but when reacted for about 3 to 4 hours, a high temperature liquid material having sufficient fluidity can be obtained. Hot liquid material has a property of solidifying at room temperature, wherein the calorific value of the hardened liquid material is about 9,000 to 11,000 kcal / kg.

Here, if the temperature of the molten bath is too high, the residence time is shortened, but a lot of gaseous products are generated and coke is deposited on the inner wall of the molten bath to lower the heat transfer efficiency, and if it is severely generated, the operation of the molten bath becomes impossible. It is essential to maintain the reaction time and optimum temperature within the range of.

Finally, the sludge fuelization process (S400) will be described.

The sludge fuelization process (S400) is a process for producing sludge solid fuel by reacting the sludge pretreated in the sludge pretreatment process (S100) with a high temperature liquid substance generated in the melting process (S300) in a sludge fuelization reactor.

That is, in the present invention, the pretreated sludge is melt-kneaded together with the thermoplastic polymer compound through a stirrer rotating at a low speed of 3rpm at a temperature above the softening point to attach the pretreated sludge particles to the molten liquid material. The amount of the hot liquid material required in the sludge fuelization process (S400) is preferably adjusted to 30 to 50 parts by weight of the liquid material to 100 parts by weight of the pretreated sludge.

That is, the pretreated sludge is immersed in the liquid material for a predetermined time, and the water in the pretreated sludge is efficiently evaporated by stirring and vibrating, so that the pretreated sludge is dried, and where the water of the pretreated sludge is present, The liquid substance is replaced to obtain a sufficiently mixed state of the pretreated sludge and the hot liquid substance. In particular, a sufficient amount of liquid material is impregnated into the pretreated sludge, since the voids in the pretreated sludge are sufficiently widened as water escapes into the steam inside the pretreated sludge. At this time, the reaction time of the liquid material and the pretreated sludge takes about 20 to 40 minutes, the calorific value of the fuel produced is about 5,000 to 6,000 kcal / kg. In addition, the sludge fuelization reaction tank is preferably heated to about 80 to 120 ℃ to react while preventing the solidification of the liquid material.

As described above, the sludge solid fuel produced by the present invention has a diameter of 10 mm to 60 mm, and the sludge solid fuel melted is 15% or less in water content, and about 25 to 35% of sludge throughput can be produced. In this case, the final sludge solid fuel may be cooled and cured without being molded.

Hereinafter, with respect to the sludge fuelization method using the melt byproduct of the thermoplastic polymer compound according to another embodiment of the present invention focusing on the difference from the sludge fuelization method using the melt byproduct of the thermoplastic polymer compound according to an embodiment of the present invention It will be described in detail with reference to.

2 is a flowchart of a sludge fuelization method using melt byproducts of a thermoplastic polymer compound according to another exemplary embodiment of the present invention.

As shown in Figure 2, the sludge fuelization method using the molten by-product of the thermoplastic polymer compound according to another embodiment of the present invention, the sludge pretreatment process (S100), a thermoplastic polymer to prepare the pretreated sludge by uniformizing the particle diameter of the original sludge Thermoplastic polymer compound pretreatment step (S200) for removing and pulverizing foreign substances contained in the compound, melting step (S300) for preparing a high temperature liquid material by heating the pretreated thermoplastic polymer compound in a melting tank (S300), the pretreated sludge And a sludge drying process (S350) for preparing dry sludge by evaporating moisture contained in the pretreated sludge by injecting the exhaust gas generated during melting of the thermoplastic polymer compound into a sludge drying apparatus, and the dry sludge and the high temperature liquid phase. Sludge lead that reacts materials to produce sludge solid fuel It may be made, including the drawing process (S450).

That is, in the present embodiment, the sludge solid fuel is reacted by drying the dried sludge with a moisture content of about 40 to 60% by using a flue gas generated when the pretreated sludge melts the thermoplastic polymer compound. It is characteristic in producing.

In the present embodiment, the sludge pretreatment process (S100), the thermoplastic polymer compound pretreatment process (S200), and the melting process (S300) are the same as in the embodiment of the present invention as described above, and thus detailed description thereof will be omitted.

First, the sludge drying process (S350) will be described.

Sludge drying step (S350) is a step of primary drying by hot air drying method using the exhaust gas generated when the sludge pretreated in the sludge pretreatment step (S100) melting the thermoplastic polymer compound of the melting step (S300) as a heat source. .

In this process, the sludge firstly dried by the sludge drying apparatus has a water content of about 40 to 60%. In other words, the higher the water content of the sludge increases the energy load and may inhibit the safe operation due to the rapid vaporization of water, it is usually preferable to limit the water content to 40 to 70% or less. At this time, the odor and exhaust gas generated during drying is finally processed through the exhaust gas treatment device.

Here, the sludge drying device is a temperature of 120 ~ 200 ℃ hot air introduced into the rotary kiln type should be installed inside the impeller to facilitate the sludge transfer and contact with the exhaust gas, so that sludge tangling does not occur shall. In addition, by controlling the speed of the impeller and rotary kiln should be able to actively deal with the problems that may occur during drying, the sludge residence time in the sludge drying apparatus is about 20 to 40 minutes.

As such, when the sludge is first dried by the sludge drying process (S350), the amount of dry sludge generated through the sludge drying apparatus is about 300 to 750 kg.

Next, the sludge fuelization process (S450) is demonstrated.

The sludge fuelization process (S450) is a process of producing sludge solid fuel by reacting the high temperature liquid material generated in the melting process (S300) and the dry sludge first dried in the sludge drying process (S350) in a sludge fuelization reactor.

That is, the dry sludge is immersed in a high temperature liquid material for a predetermined time, and is stirred and vibrated, so that the moisture in the dry sludge is efficiently evaporated, so that the dry sludge is secondarily dried, and in the place where the moisture of the dry sludge existed. Subsequently, the liquid substance of is substituted and the dry sludge and the high temperature liquid substance are sufficiently mixed.

In particular, a sufficient amount of liquid material is impregnated into the dry sludge because the voids in the dry sludge are sufficiently widened while water escapes into the steam inside the secondary dried sludge. At this time, the reaction time of the liquid material and the dry sludge takes about 20 to 40 minutes, the calorific value of the fuel produced is about 5,000 to 6,000 kcal / kg. In addition, the sludge fuelization reaction tank is preferably heated to about 80 to 120 ℃ to react while preventing the solidification of the liquid material.

As described above, the final sludge solid fuel produced by the present invention has a water content of 15% or less, and about 25 to 35% of sludge throughput may be produced.

Hereinafter, the sludge fuelization method using the molten by-product of the thermoplastic polymer compound according to the present invention will be described using the preferred embodiment of the present invention, but the following examples are only preferred embodiments of the present invention for the purpose of understanding the present invention. The invention is not limited to the following examples.

Example 1

Filter foreign substances such as metal contained in the raw sludge supplied from sewage treatment plant and crush them into 20mm size. In addition, after filtering the foreign matter mixed in the waste plastic, the waste plastic is shredded to about 50mm in size. The crushed waste plastic is placed in a melting bath heated to 300 ° C. and melted through a stirrer rotating at a low speed of 3 rpm for 4 hours. When the waste plastic becomes a liquid material having high fluidity, the sludge particles react with the pretreated sludge for about 30 minutes through a stirrer rotating at a low speed of 3 rpm in the sludge fuel tank at a ratio of 3: 7. To be attached. At this time, the sludge fueling reaction tank is heated to 80 ° C. so that a sufficient amount of liquid substance is impregnated into the voids in the sludge, and then cooled slowly while preventing solidification of the liquid substance to finally produce sludge solid fuel having a size of about 10 to 60 mm.

Example 2

Filter foreign substances such as metals contained in the raw sludge supplied from the sewage treatment plant and crush them to have a particle diameter of about 20mm. In addition, after filtering the foreign matter mixed in the waste vinyl and finely crushed, the waste vinyl is put into a molten bath heated to 200 ℃ and melted through a stirrer rotating at a low speed of 3rpm for 3 hours. At this time, a hot exhaust gas is generated during heating. A flue gas of about 150 ° C. generated during melting of the waste plastic is introduced into the sludge drying apparatus together with the pretreated sludge to dry the pretreated sludge to form a dry sludge having a water content of 50%. Thereafter, the dry sludge and the high temperature liquid material are added to the sludge fueling reaction tank at a ratio of 3: 7, and reacted for about 25 minutes through a stirrer rotating at a low speed of 3 rpm so that the dry sludge particles adhere to the molten liquid material. Here, the sludge fuelization reactor is heated to 80 ° C. so that a sufficient amount of liquid material is impregnated into the pores in the dry sludge, and then cooled slowly while preventing solidification of the liquid material, thereby finally producing sludge solid fuel having a size of about 10 to 60 mm.

Hereinafter, the economics of the sludge fuelization method using the molten by-product of the thermoplastic polymer compound according to the present invention and the conventional sludge treatment technology and similar technologies will be described with reference to Tables 3 and 4.

Technical name dry incineration carbonization Oil temperature drying Example Treatment target
matter Sludge Sludge Sludge Sludge Thermoplastic polymer compound
Sludge Energy utilization lowness height middle lowness height Energy-efficient
convenience lowness middle middle lowness height Profitability lowness lowness lowness lowness height

As shown in Table 3, the sludge fuelization method using the melt by-product of the thermoplastic polymer compound according to the present invention can be treated simultaneously with the thermoplastic polymer compound and sludge treatment, the thermoplastic polymer compound at 200 to 350 ℃ The energy utilization is high and convenient by drying the sludge using the exhaust gas of 120 to 200 ℃ generated when melting. In addition, by reacting the dried sludge with a liquid material of a high temperature it can be expected the sales, etc. due to the production and sale of sludge solid fuel.

division Oil temperature drying Example Remarks To dry
Used
matter
Waste oil Flue gas and high-temperature liquid substance generated when melting thermoplastic polymer compound Sludge throughput: 100 tons / day
Waste Purchase Fee: 400 wonL
Waste oil consumption when drying sludge: 10% of sludge throughput
-Liquid fuel consumption when drying sludge: 30 ~ 40% of sludge throughput
-Sludge treatment fee: 40,000 won
Waste plastic treatment fee: 100,000 won
When drying
Cost of Consumption (1) Waste Purchase Cost
100 tons / day * 400 won / L * 0.1 = 4 million won
none

waste
Processing fee
Income (2)

Sludge Treatment Fee Income
100 tons / day * 40,000 won / tonne = 4 million won / day -Waste plastic (waste vinyl) processing costs
40㎥ / day * 100,000 won / ton = 4 million won / day
-Sludge treatment fee income
100 tons / day * 40,000 won / tonne = 4 million won / day
-Processing fee income: 8 million won / day Estimated Revenue
(Excluding driving costs)
(2)-(1) = 0 won / day
(2)-(1) = 8 million won / day
Device configuration
Sludge Dryer Melting tank
Sludge drying equipment
Sludge Fueling Reactor

As shown in Table 4, in the prior art oil temperature drying method, the dried sludge is difficult to store and transfer to other areas because the waste oil is on the outside, but the sludge dried according to the present embodiment within 30 minutes at room temperature It can be used as a sludge solid fuel that has a solid surface that is smooth and can be easily stored and transferred to other areas. In addition, this embodiment is a useful invention that can expect a stable profit through the waste treatment and sludge solid fuel sales.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of the invention.

1 is a process diagram of a sludge fuelization method using melt by-products of a thermoplastic polymer compound according to an embodiment of the present invention, and

Figure 2 shows a process diagram of the sludge fuelization method using the melt by-product of the thermoplastic polymer compound according to another embodiment of the present invention, respectively.

Claims (7)

Sludge pretreatment process for producing pretreated sludge so that the water content is 60 to 70% without uniform drying process and the particle size of the raw sludge is uniform. Thermoplastic polymer compound pretreatment process for removing foreign matter contained in the thermoplastic polymer compound, crushing or crushing A melting step of preparing the pre-treated thermoplastic polymer compound in a melting tank and heating it to produce a high temperature liquid material; and A sludge fueling process for producing a sludge solid fuel having a water content of 15% or less by reacting the pretreated sludge with the high temperature liquid material. Include, The melting step, Melt at 200-350 ° C. for 3-4 hours, The sludge fuelization process, Reaction is carried out at 80 to 120 ℃ for 20 to 40 minutes, containing 100 parts by weight of the pretreated sludge and 30 to 50 parts by weight of the liquid material Sludge fuelization using molten byproducts of thermoplastic polymer compounds. delete delete delete In claim 1, The thermoplastic polymer compound, Polystyrene, ethylene vinyl acetate copolymer, ethyl ethylene acrylate copolymer, polypropylene, acrylonitrile-butadiene-styrene copolymer, acrylonitrile-styrene copolymer, methyl methacrylate, vinyl chloride vinyl acetate copolymer, vinyl chloride Vinyl acetate maleic acid copolymer, vinyl vinyl acetate copolymer, vinylidene chloride vinyl chloride copolymer, vinyl acrylonitrile chloride copolymer, ethylene vinyl chloride copolymer, propylene vinyl chloride copolymer, vinyl acetate, polyvinyl alcohol, polyamide And a sludge fueling method using a melt by-product of a thermoplastic polymer compound which is any one or two or more copolymers of polyacetal, polyester, polycarbonate, polysulfone, polyetherimide, polyamideimide and polyphenylene sulfide. delete delete

Images