KR101229005B1

KR101229005B1 - Arraratus of manufacturing fuel and manufacturing method of fuel using sludge

Info

Publication number: KR101229005B1
Application number: KR1020100062595A
Authority: KR
Inventors: 장영광; 장민훈
Original assignee: 장민훈; 장영광
Priority date: 2010-06-30
Filing date: 2010-06-30
Publication date: 2013-02-04
Also published as: KR20120001952A

Abstract

The present invention relates to a fuel production apparatus and a manufacturing method using the sludge, the sludge supply unit for supplying the dried sludge mass; A pulverizing unit for pulverizing the sludge mass supplied from the sludge supply unit; A screen filter unit which receives the sludge crushed from the crushing unit and applies vibration to make the powder form and then separates it; A sludge silo in which powder sludge filtered by the screen filter part is stored; Petrochemical silos, slaked lime silos and water tanks in which petrochemical powder, slaked lime and water are stored respectively; A kneader for mixing and conveying a sludge mixture composed of the sludge, petrochemical powder, slaked lime and water discharged from the sludge silo, petrochemical silo, slaked lime silo and water tank; A aging tank for aging by stirring the sludge mixture supplied from the kneader; A fuel coal forming unit receiving the sludge mixture matured in the aging tank and carbonizing the fuel coal; And it characterized in that it comprises a dry discharge unit for discharging the hot air drying the fuel coal formed in the fuel coal forming unit.
According to the fuel production apparatus and the manufacturing method using the sludge according to the present invention, by adding petrochemical powder, calcined lime and the like to the sludge powder to form a solid, it is possible to produce a fuel coal with a higher calorific value by drying.

Description

Fuel production apparatus and manufacturing method using sludge {ARRARATUS OF MANUFACTURING FUEL AND MANUFACTURING METHOD OF FUEL USING SLUDGE}

The present invention relates to a fuel manufacturing apparatus and a manufacturing method using sludge, and more specifically, to add a petrochemical powder, calcined lime and the like to the sludge powder to form a solid after drying the sludge to increase the heat of the sludge It relates to a fuel production apparatus and a manufacturing method using.

In general, wastewater containing a large amount of sludge is generated in sewage treatment, wastewater treatment, or various kinds of livestock manure, and the sludge is separated from water using a centrifuge or a concentrator to separate the sludge from the sludge. After disposal, it is disposed of after titration.

However, when the sludge from which the water is removed is disposed of, serious pollution of the soil and pollution of the environment occur.

In other words, the sludge generated by the supply of sewage and sludge generated in large quantities during the treatment of livestock manure have become a big problem to secure disposal sites such as landfills, and for this reason, it is recycled as a valuable resource using sludge. Various ways to do this are being sought, and ways to reduce the use of cone posts to green farmland and to use molten slugs of sludge incineration ash for construction materials such as civil engineering are required. There was a problem with low realism.

In addition, the existing sewage treatment plant or waste water treatment plant is moved to a state containing sludge in the water, so the flocculation tank is formed by solidifying floc by administering a flocculant, etc. Since the sludge is separated and the sludge separated above is mostly disposed or disposed of in landfill or incineration, serious environmental problems occur due to bad smell or soil pollution generated during disposal.

An object of the present invention is to solve the above problems, and to form a sludge, waste water sludge into a solid fuel coal, a fuel manufacturing apparatus and a manufacturing method using a sludge to be used as fuel for home, power plants, etc. To provide.

In order to achieve the above object, the fuel manufacturing apparatus using the sludge of the present invention, the sludge supply unit for supplying the dried sludge mass; A pulverizing unit for pulverizing the sludge mass supplied from the sludge supply unit; A screen filter unit which receives the sludge crushed from the crushing unit and applies vibration to make the powder form and then separates it; A sludge silo in which powder sludge filtered by the screen filter part is stored; Petrochemical silos, slaked lime silos and water tanks in which petrochemical powder, slaked lime and water are stored respectively; A kneader for mixing and conveying a sludge mixture composed of the sludge, petrochemical powder, slaked lime and water discharged from the sludge silo, petrochemical silo, slaked lime silo and water tank; A aging tank for aging by stirring the sludge mixture supplied from the kneader; A fuel coal forming unit receiving the sludge mixture matured in the aging tank and carbonizing the fuel coal; And it characterized in that it comprises a dry discharge unit for discharging the hot air drying the fuel coal formed in the fuel coal forming unit.

The sludge supply unit, the pulverization unit, the screen filter unit, the kneader, the aging tank and the fuel coal forming unit may be installed in a closed state.

In addition, first, second and third bucket conveyors for transferring the sludge or the sludge mixture are installed between the sludge supply unit and the crush unit, between the crush unit and the screen filter unit, and between the aging tank and the fuel coal forming unit, respectively. A fourth bucket conveyor and a transfer belt may be installed between the screen filter unit and the sludge silo.

In addition, the first, second, third, fourth bucket conveyor and the transfer belt is characterized in that the installation is closed with the outside.

In addition, the grinding unit is characterized in that the hammer mill.

In addition, a dust collector is installed between the crushing unit and the second bucket conveyor to collect dust particles of the sludge crushed in the crushing unit, characterized in that the filter cloth is installed on the upper side of the dust collector.

In addition, the filter cloth is characterized in that the medium filter or hepa filter.

In addition, the screen filter unit, the hopper is formed in the upper opening; A screen filter installed at an upper side of the hopper to be inclined to separate the sludge in powder form; And a vibration motor attached to the hopper or screen filter to generate vibration.

The apparatus may further include a screw conveyor for returning sludge which is not separated from the screen filter to the first bucket conveyor.

In addition, the aging tank includes a stirring cylinder, an impeller disposed in the stirring cylinder, a motor for rotating the impeller, the aging tank is characterized in that the sludge mixture is stirred for 3 to 4 minutes.

The fuel coal forming unit may include a pair of first and second forming rollers and a driving unit for rotating the forming rollers, wherein a plurality of forming grooves are formed on the outer circumference of the first and second forming rollers. do.

In addition, the forming groove is characterized in that it is made of any one of the shape of an ellipse or hemispherical shape, a rectangular parallelepiped, a cube in which the cross-sectional area gradually decreases in the radial direction from the outer peripheral surface of the first and second forming rollers.

In addition, when the forming groove is formed in the elliptic shape, the length of the long axis of the forming groove of the forming roller outer peripheral is characterized in that 50 ~ 70mm.

In addition, the dry discharge unit, characterized in that it comprises a mesh conveyor belt, a rotary drive unit for rotating the mesh conveyor belt and a heater and a blowing fan for supplying high temperature hot air.

In addition, the dust collecting unit is further provided on the lower side of the mesh conveyor belt.

In addition, the heating temperature of the heater is characterized in that the 70 ~ 80 ℃.

Fuel production method using the sludge of the present invention devised to achieve the object as described above, (a) grinding the sludge mass to produce a sludge powder; (b) adding a petrochemical powder, slaked lime and water to the sludge powder to produce a sludge mixture; (c) stirring the sludge mixture produced in step (b); (d) injecting the sludge mixture stirred in the step (c) into a molding machine to form fuel coal; And (e) characterized in that it comprises the step of hot air drying the fuel coal formed in step (d).

In addition, the sludge mixture is characterized by consisting of a mixture of 50 to 70% by weight of sludge powder, 22 to 30% by weight of petrochemical powder, 1 to 3% by weight of lime and 7 to 9% by weight of water. It is done.

In addition, the petrochemical powder is characterized in that it comprises vinyl, PE, PVC, PP and RDF.

In addition, the sludge powder is characterized in that consisting of sewage, wastewater sludge or food waste.

According to the fuel production apparatus and the manufacturing method using the sludge according to the present invention described above, by adding petrochemical powder, calcined lime, etc. to the sludge powder to form a solid, it is possible to produce a fuel coal with a higher calorific value by drying.

By using such fuel coal as fuel for domestic boilers and power plants, it is possible to replace some of the fossil fuels.

In addition, the sludge supply unit, the pulverization unit, the screen filter unit, the kneader, the aging tank, the fuel coal forming unit and the plurality of bucket conveyors are installed in a closed state to the outside, so that the fine dust generated during the process of manufacturing fuel coal is scattered. There is also an effect that can prevent.

1 is a block diagram showing an apparatus for producing fuel using sludge according to an embodiment of the present invention.
2 is a perspective view briefly showing a fuel coal forming unit of the fuel production apparatus using sludge according to an embodiment of the present invention.
3 is a cross-sectional view of the forming roller of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram showing a fuel production apparatus using sludge according to an embodiment of the present invention, Figure 2 is a perspective view briefly showing a fuel coal forming unit of the fuel production apparatus using sludge according to an embodiment of the present invention, Figure 3 Is a cross-sectional view of the forming roller of FIG.

Fuel production apparatus using sludge according to an embodiment of the present invention is to form a fuel coal that can be fuelized after mixing other materials in the sewage, wastewater sludge, as shown in Figures 1 to 3, sludge supply unit 100 ), Crushing unit 110, screen filter unit 120, sludge silo 200, petrochemical silo 210, slaked lime silo 220, water tank 230, kneader 300, aging tank ( 310, the fuel coal forming unit 320 and the dry discharge unit 330.

First, the sludge supply unit 100 supplies sludge dried in a conventional rotary kiln dryer (not shown) to a pulverization unit 110 to be described later. Applicable

In this case, the sludge supply unit 100 is preferably installed in a closed state with the outside to prevent dust generated during the process of transporting the sludge along the sludge supply unit 100 to the outside, for example, It is possible by further providing a case surrounding the outer edge of the conveyor belt.

In addition, the sludge includes sewage and wastewater sludge, but may further include food waste and manure.

On the other hand, the sludge conveyed from the sludge supply unit 100 is first supplied to the first bucket conveyor 410 for the upper input into the crushing unit 110 and the lumped state due to the bucket rotation of the first bucket conveyor 410 The sludge is introduced into the grinding unit 110.

At this time, the sludge mass introduced into the crushing unit 110 has an irregular shape having a diameter of about 40 ~ 60mm.

On the other hand, the first bucket conveyor 410 is also preferably installed in a closed state with the outside, such as the sludge supply unit 100 for the same reason as described above.

The crushing unit 110 is a sludge supply unit 100 more specifically, the crushed sludge lumps transferred from the first bucket conveyor 410 has a particle size of a predetermined size or less, the crushed sludge lump is It has a particle size of about 2 ~ 3mm and is discharged to the lower side of the crushing unit (110).

Conventional hammer mill (hammer mill) may be applied to the grinding unit 110, the sludge mass injected into the grinding unit 110 is crushed by a centrifugal rotating hammer (not shown) inside the fine slit groove ( It is discharged to have the above-described particle size through (not shown).

At this time, the sludge discharged from the crushing unit 110 has a state of small viscosity, for example, it is possible to sufficiently powder by the human hand or a fine vibration.

Subsequently, the sludge discharged to the lower side of the crushing unit 110 is first supplied to the second bucket conveyor 420 and then the second bucket conveyor 420 for the top input of the screen filter unit 120 which will be described later as described above. Due to the bucket rotation of the sludge is introduced into the upper side of the screen filter unit 120.

Meanwhile, the dust collector 710 may be further installed in the closed passage 510 between the crushing unit 110 and the second bucket conveyor 420 to collect dust particles of the sludge.

Since the sludge dust particles collected by the dust collector 710 can be lowered downward and re-supplied to the second bucket conveyor 420, it is possible to prevent the air pollution due to the scattering of the sludge dust particles in the air, The fine dust particles that can be scattered and disposed of can be recycled.

Here, the filter cloth 720 is preferably installed on the upper side of the dust collector 710 to filter out fine particles such as sludge dust and dust in the air and to discharge the air in a somewhat clean state to the outside. 720 may be applied as a medium filter or a hepa filter.

More specifically, the screen filter unit 120 receives the sludge formed from the second bucket conveyor 420 in the form of particles of about 2 to 3 mm, and then vibrates to powder the sludge. It is for.

The screen filter unit 120 is a hopper 121 having an inlet is formed in the upper side so as to communicate with the outlet of the second bucket conveyor 420, the screen filter 122, the hopper (121) installed inclined above the hopper 121 121 or a vibration motor 123 attached to the screen filter 122 to generate vibration.

Here, the screen filter 122 is made of a mesh form having a mesh of fine size to separate the powdered sludge below the mesh size to the lower side, the powder of the sludge through the vibration impartment using the vibration motor 123 Anger is made more quickly and efficiently.

In addition, the powdered sludge separated from the screen filter 122 is introduced into the bucket of the fourth bucket conveyor 440 and then supplied to the sludge silo 200 through the transfer belt 520.

Here, the second bucket conveyor 420, the screen filter unit 120, the fourth bucket conveyor 440 and the conveying belt 520 is to prevent the dust of the sludge in the form of particles or sludge of the powder form to be scattered in the air. It is preferably made in a closed state with respect to the outside, for example, as described above can be arranged in a predetermined case.

On the other hand, one side of the hopper 121 is further provided with a screw conveyor 610 consisting of a return screw 611 and a screw motor 612 for rotating the return screw 611, the return screw 611 Is extended to the first bucket conveyor 410 is installed.

Therefore, the sludge particles having a predetermined size or more, which are not filtered by the screen filter 122, are returned through the screw conveyor 610 and re-injected into the first bucket conveyor 410 and then through the crushing unit 110. The grinding process is repeated.

As described above, the sludge silo 200 is supplied with and stored with powdered sludge through the transfer of the fourth bucket conveyor 440 and the transfer belt 520.

In addition, one side of the sludge silo 200 is provided with a petrochemical silo 210, a slaked lime silo 220 and a water tank 230 in which petrochemical powder, slaked lime and water are respectively stored.

Here, the petrochemical powder is to form a fuel coal, which will be described later having a higher caloric value by mixing with the sludge powder, petrochemical waste products such as household waste dry matter, PE, PP, PVC, waste solid fuel (RDF), vinyl It is prepared by melting and grinding.

In addition, the fuel coal formed by the addition of the petrochemical powder has a higher calorific value of at least 20 to 30% or more than the fuel coal formed from the sludge powder only.

The calcined lime (calcium hydroxide; Ca (OH) ₂ ) gives viscosity during mixing of the sludge powder and the petrochemical powder in the kneader 300 and the aging tank 310 which will be described later. It functions as a caking agent for solidifying the mixture, and also has a high pH in the mixture to prevent generation of harmful gases such as ammonia by oxidation and reduction reactions during the solidification treatment.

The kneader 300 is a sludge composed of the sludge powder 200, the petrochemical silo 210, the slaked lime silo 220 and the water tank 230, the sludge powder, petrochemical powder, slaked lime and water Conveying the mixture while mixing.

Such a kneader 300 may be applied to a conventional screw conveyor, it is preferable to be applied in a structure having at least two or more screws in order to more evenly mix the sludge mixture.

Meanwhile, the sludge powder, the petrochemical powder, and the sintered ash are provided in the respective injection pipes connecting the lower portion of the sludge silo 200, the petrochemical silo 210, and the slaked lime silo 220 and the inlet of the kneader 300. In addition to adjusting the input amount, the rotary valve 301 is installed to supply a predetermined amount for a predetermined period.

In addition, on the pipe connecting the water tank 230 and the kneader 300, a manual valve or a solenoid valve capable of automatic adjustment is installed to adjust the injection amount of water.

Therefore, the control unit (not shown) adjusts the rotation angle of the rotary valves 301 and adjusts the opening degree of the solenoid valve to adjust the amount of the aforementioned powders, slaked lime and water into the kneader 300.

In the embodiment of the present invention the sludge mixture is 50 to 70% by weight of the sludge powder, 22 to 30% by weight petrochemical powder, 1 to 3% by weight of lime and 7 to 9% by weight of water It should be a mixed configuration.

In addition, the sludge silo 200, the petrochemical silo 210, the slaked lime silo 220 and the water tank 230 is provided with a load cell (not shown) to easily check the remaining amount of the contents stored therein. It is installed.

On the other hand, the sludge mixture is mixed in the kneader 300 is put into the aging tank 310 and stirred for a predetermined time.

Specifically, the aging tank 310 is configured to include a stirring cylinder 311, the impeller 312 disposed in the stirring cylinder 311, the motor 313 for rotating the impeller 312, the aging In the tank 310, the sludge mixture is aged by stirring for 3-4 minutes.

If the stirring time is less than 3 minutes, the viscosity of the sludge mixture has a considerably high state, making it difficult to form the fuel coal in the fuel coal forming unit 320 to be described later. Similarly, if the stirring time exceeds 4 minutes, Since the viscosity is low, the fuel coal forming operation of the fuel coal forming unit 320 becomes difficult.

Meanwhile, the sludge mixture matured in the aging tank 310 is supplied to the fuel coal forming unit 320 through a normal conveyor belt and a third bucket conveyor 430.

As shown in FIGS. 2 and 3, the fuel coal forming unit 320 carbonizes the sludge mixture with fuel coal, and includes a pair of first and second forming rollers 321 and 322 and the forming rollers 321 and 322. It comprises a drive unit (not shown) for rotating.

Here, a plurality of forming grooves 324 are formed in the first and second forming rollers 321 and 322, and the sludge mixture introduced into the upper inlet of the fuel coal forming unit 320 is filled in the forming grooves 324. The first and second shaping rollers 321 and 322 are rotated to form a solid fuel coal.

On the other hand, the forming groove 324 may be formed in an elliptical shape in which the cross-sectional area gradually decreases in the radial direction from the outer peripheral surface of the first, second forming rollers (321, 322), wherein the long axis length of the forming groove in the outer peripheral surface Make it 50 ~ 70mm.

In addition, the forming groove 324 may be made in a variety of shapes, such as hemispherical, rectangular parallelepiped, cube.

In the embodiment of the present invention, the sludge supply unit 100, the crushing unit 110, to prevent the sludge powder from scattering in the air during the sludge is transferred from the initial sludge supply unit 100 to the fuel coal forming unit 320 The screen filter unit 120, the kneader 300, the aging tank 310 and the fuel coal forming unit 320 is preferably installed in a closed state.

However, the inlet and outlet for the input and discharge of the sludge is to communicate with each other, the first, second, third, fourth bucket conveyor (410, 420, 430, 440) and the conveying belt 520 for the same reason as described above Also to be installed in a closed state with the outside.

The dry discharge unit 330 is supplied with the fuel coal formed by the fuel coal forming unit 320, and receives a mesh conveyor belt 331, a rotation driving unit (not shown) for rotating the mesh conveyor belt 331, and high temperature hot air. It is configured to include a heater (not shown) and a blowing fan (not shown) to supply.

In the embodiment of the present invention, the heater to prevent the fuel coal is burned during the process of transporting the fuel coal along the mesh conveyor belt 331 due to excessive heat generation of the heater, or the heat generation amount of the heater is not enough to dry the fuel coal sufficiently hot air. The exothermic temperature is to be 70 ~ 80 ℃.

Therefore, the fuel coal formed in the fuel coal forming unit 320 is supplied to the dry discharge unit 330 and dried by hot air and finally discharged. The fuel coal is used for various purposes such as domestic boilers, thermal power generation, and market stores. It can be used as fuel.

In addition, a separate dust collecting part (not shown) is further provided below the mesh conveyor belt 331 to collect the sludge powder falling from the fuel coal during the process of transporting the fuel coal in a state of being struck in the upper portion of the mesh conveyor belt 331. Make it possible.

The sludge powder collected in the dust collecting part is resupplied to the initial sludge supply part 100 or the first bucket conveyor 410 or the like.

On the other hand, the drying discharge unit 330, it is preferable that the exhaust communication 810 is further installed to discharge the fine and light dust or sludge particles generated during the process of drying and transporting the fuel coal.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to such specific embodiments, and those skilled in the art may appropriately change within the scope described in the claims of the present invention. Or modifications may be possible.

For example, the first, second, third, and fourth bucket conveyors 410, 420, 430, and 440 may be changed to a screw conveyor installed inclined, and a medium or hepa filter may be further installed in the exhaust communication 810.

100: sludge supply unit 110: crushing unit
120: screen filter unit 121: hopper
122: screen filter 123: vibration motor
200: sludge silo 210: petrochemical silo
220: slaked lime silo 230: water tank
300: kneader 301: rotary valve
310: aging tank 311: stirring vessel
312 impeller 313 motor
320: fuel coal forming unit 321: first forming roller
322: second forming roller 324: forming groove
330: dry discharge unit 331: mesh conveyor belt
410: first bucket conveyor 420: second bucket conveyor
430: third bucket conveyor 440: fourth bucket conveyor
510: passage 520: transport belt
610: screw conveyor 611: return screw
612: screw motor 710: dust collector
720: filter cloth 810: exhaust communication

Claims

A sludge supply unit for supplying dried sludge mass;
A pulverizing unit for pulverizing the sludge mass supplied from the sludge supply unit;
A screen filter unit which receives the sludge crushed from the crushing unit and applies vibration to make the powder form and then separates it;
A sludge silo in which powder sludge filtered by the screen filter part is stored;
Petrochemical silos, slaked lime silos and water tanks in which petrochemical powder, slaked lime and water are stored respectively;
A kneader for mixing and conveying a sludge mixture composed of the sludge, petrochemical powder, slaked lime and water discharged from the sludge silo, petrochemical silo, slaked lime silo and water tank;
A aging tank for aging by stirring the sludge mixture supplied from the kneader;
A fuel coal forming unit receiving the sludge mixture matured in the aging tank and carbonizing the fuel coal; And
It includes a dry discharge unit for hot-air drying and discharge the fuel coal formed in the fuel coal forming unit,
The sludge supply unit, the pulverization unit, the screen filter unit, the kneader, the maturation tank and the fuel coal forming unit is installed in a closed state with the external fuel manufacturing apparatus using sludge.

delete

The method of claim 1,
First, second and third bucket conveyors for transporting the sludge or the sludge mixture are installed between the sludge supply unit and the crush unit, between the crush unit and the screen filter unit, and between the aging tank and the fuel coal forming unit, respectively.
A sludge sludge fuel production apparatus, characterized in that the fourth bucket conveyor and the transfer belt is installed between the screen filter unit and the sludge silo.

The method of claim 3,
The first, second, third, fourth bucket conveyor and the conveying belt is a fuel manufacturing apparatus using sludge, characterized in that installed in a closed state with the outside.

The method of claim 1,
The grinding unit is a fuel manufacturing device using sludge, characterized in that the hammer mill.

The method of claim 3,
A dust collector is installed between the crushing unit and the second bucket conveyor to collect dust particles of the sludge crushed in the crushing unit, and a filter cloth is installed on the upper side of the dust collector.

The method according to claim 6,
The filter fabric is a fuel manufacturing apparatus using sludge, characterized in that the medium filter or hepa filter.

The method of claim 1,
The screen filter unit,
Hopper formed in the upper opening;
A screen filter installed at an upper side of the hopper to be inclined to separate the sludge in powder form; And
And a vibration motor attached to the hopper or screen filter to generate vibration.

9. The method of claim 8,
And a screw conveyor for returning sludge that is not separated from the screen filter to the first bucket conveyor.

The method according to any one of claims 1 or 3 to 9,
The aging tank includes a stirring cylinder, an impeller disposed in the stirring cylinder, a motor for rotating the impeller,
In the aging tank, the sludge mixture using a sludge mixture, characterized in that for 3 to 4 minutes.

The method according to any one of claims 1 or 3 to 9,
The fuel coal forming unit includes a pair of first and second forming rollers and a driving unit to rotate the forming rollers, wherein a plurality of forming grooves are formed on the outer circumference of the first and second forming rollers. Fuel production apparatus using.

The method of claim 11,
The forming groove is a fuel manufacturing apparatus using sludge, characterized in that formed in any one of the shape of the ellipse or hemispherical shape, rectangular parallelepiped, cube and the sectional area gradually decreases in the radial direction from the outer peripheral surface of the first and second forming rollers. .

The method of claim 12,
When the forming groove is formed in the elliptic shape, the length of the long axis of the forming groove of the outer peripheral roller forming roller is 50 ~ 70mm, characterized in that the fuel production apparatus using sludge.

The method according to any one of claims 1 or 3 to 9,
The dry discharge unit,
And a mesh conveyor belt, a rotary driving unit for rotating the mesh conveyor belt, and a heater and a blower fan for supplying hot air at high temperature.

15. The method of claim 14,
Fuel production apparatus using sludge, characterized in that the dust collecting unit is further installed on the lower side of the mesh conveyor belt.

15. The method of claim 14,
Exothermic temperature of the heater is a fuel manufacturing apparatus using sludge, characterized in that 70 ~ 80 ℃.

(a) milling the sludge mass to produce sludge powder;
(b) adding a petrochemical powder, slaked lime and water to the sludge powder to produce a sludge mixture;
(c) stirring the sludge mixture produced in step (b);
(d) injecting the sludge mixture stirred in the step (c) into a molding machine to form fuel coal; And
(e) hot air drying the fuel coal formed in the step (d);
The sludge mixture is characterized by consisting of a mixture of 50 to 70% by weight of the sludge powder, 22 to 30% by weight of petrochemical powder, 1 to 3% by weight of lime and 7 to 9% by weight of water. Fuel production method using sludge.

delete

18. The method of claim 17,
The petrochemical powder is a fuel manufacturing method using sludge, characterized in that containing vinyl, PE, PVC, PP and RDF.

18. The method of claim 17,
The sludge powder is sludge, fuel production method using sludge, characterized in that consisting of waste water sludge or food waste.