KR100965288B1 - Drying Equipment of Organic Sludge using Immersed Drying Method - Google Patents

Abstract

The present invention relates to a water-in-oil evaporation drying apparatus of organic sludge, wherein the organic sludge or lower hydrocarbon compound transferred to the oil-in-oil evaporation tank is contacted with heated oil, and water in the organic sludge is discharged, and oil is penetrated into the pores, thereby generating heat. The present invention relates to an organic sludge in-oil evaporation drying apparatus capable of producing solid fuels ranging from 4,000 to 6,000 kcal / kg.

The organic sludge in-oil evaporation drying apparatus of the present invention includes a sludge storage hopper in which organic sludge or a lower hydrocarbon compound is stored; Oil storage tanks storing oil for evaporative drying of organic sludge or lower hydrocarbon compounds; An oil-evaporation drying tank in which the oil supplied from the oil storage tank is heated to an appropriate temperature and the organic sludge or the lower hydrocarbon compound is evaporated to dry by the heated oil; Supply means for discharging the organic sludge or the lower hydrocarbon compound from the supply port at the bottom of the storage hopper; A sludge conveying evaporator for supplying organic sludge or a lower hydrocarbon compound supplied by the supply means to the oil-evaporation drying tank and evaporating to dry it; And discharge means for discharging the dry sludge or the lower hydrocarbon compound evaporated from the water through the oil-vapor evaporation drying tank by the sludge conveying evaporation apparatus. And a control unit.

When the organic sludge or lower hydrocarbon compound introduced into the oil-in-vapor evaporation drying tank is in contact with the oil at high temperature, a large amount of bubbles are generated as the moisture of the sludge evaporates momentarily, so that a strong buoyancy acts on the organic sludge, but the sludge transfer evaporation The device prevents organic sludge from rising and can transport organic sludge at a constant speed, so that continuous operation is possible.

Oil evaporation, organic sludge, screw, wing, belt

Description

Drying Equipment of Organic Sludge using Immersed Drying Method}

The present invention relates to a water-in-oil evaporation drying apparatus of organic sludge, wherein the organic sludge or lower hydrocarbon compound transferred to the oil-in-oil evaporation tank is contacted with heated oil, and water in the organic sludge is discharged, and oil is penetrated into the pores, thereby generating heat. The present invention relates to an organic sludge in-oil evaporation drying apparatus capable of producing solid fuels ranging from 4,000 to 6,000 kcal / kg.

In general, organic sludge contained in sewage treatment plant, wastewater treatment plant, food waste treatment plant or livestock manure is about 40 ~ 90% water content, and the content of organic components is 5 ~ 50%. Therefore, when the moisture contained in the organic sludge is effectively removed, the calorific value reaches 4,000 to 6000 kcal / kg, and when used alone or mixed with fuel such as coal, it is possible to use it as a good fuel. In addition, low hydrocarbon compounds have a high water content of 20-70%, so that they can be used as high-calorie coal after drying.

As an example of a conventional dewatering device for dewatering the organic sludge, a screen centrifuge continuously operated in the Federal Republic of Germany Patent No. 948,497, for example, a sliding screen centrifuge, a screw-type screen A method is disclosed in which wet solids dehydrated in a centrifuge or integrated casing centrifuge are dried by a drying apparatus.

The dewatered organic sludge is subjected to a pulverization process in order to dry it to 90% by weight of a dry material in a drying apparatus.

As such, the dehydration apparatus and the drying apparatus for reducing the water content are complicated and the apparatus is large, resulting in a large cost of equipment and operation. In addition, the equipment must be periodically cleaned by the fly ash generated during the crushing, and the dried and molded solid fuel has a problem that the calorific value is not high.

 Meanwhile, by-products such as glycerol and gum generated as by-products in the biodiesel oil / ethanol production process, the rapid increase in biodiesel production, which is a fuel for diesel fuel, has not been developed properly. In addition, the increase in environmental treatment costs has placed an economic burden on the management of the industry.

In addition, the oil components separated from the desorption liquor, animal fat oil from livestock slaughterhouses, and animal fat oil waste from restaurants are the main causes of increased treatment costs of sewage treatment plants as well as sedimentation. Therefore, it is possible to use organic sludge as a frying-evaporative drying oil because these animal and vegetable oils are collected and heated to a constant temperature.

 As of 2006, it contributes to the increase of national resource utilization by using about 2.72 million tons of sewage sludge produced annually in Korea and about 20,000 tons of biodiesel oil / ethanol by-product, glycerol and wastes as main raw materials. In addition, it is required to develop a solid fuel manufacturing apparatus using organic sludge which can reduce the source of sewage caused by unauthorized discharge as biodiesel oil / ethanol waste and provide alternative fuel to improve economic efficiency.

The present invention has been made to solve the above problems, an object of the present invention is to use organic sludge or lower hydrocarbon compounds of various properties by using various copper, vegetable oil and biofuel production by-product waste and fuel oil and waste oil. The present invention provides an organic sludge-in-oil evaporation drying apparatus that can produce solid fuel using high-content organic sludge or lower hydrocarbon compounds by applying evaporative drying method in a short time.

The organic sludge in-oil evaporation drying apparatus of the present invention includes a sludge storage hopper in which organic sludge or a lower hydrocarbon compound is stored; Oil storage tanks storing oil for evaporative drying of organic sludge or lower hydrocarbon compounds; An oil-evaporation drying tank in which the oil supplied from the oil storage tank is heated to an appropriate temperature and the organic sludge or the lower hydrocarbon compound is evaporated to dry by the heated oil; Supply means for discharging the organic sludge or the lower hydrocarbon compound from the supply port at the bottom of the storage hopper; A sludge conveying evaporator for supplying organic sludge or a lower hydrocarbon compound supplied by the supply means to the oil-evaporation drying tank and evaporating to dry it; And discharge means for discharging the dry sludge or the lower hydrocarbon compound evaporated from the water through the oil-vapor evaporation drying tank by the sludge conveying evaporation apparatus. And a control unit.

The sludge conveying evaporator is made of a cylindrical conveying pipe and a screw provided along the longitudinal direction inside the conveying pipe, the sludge conveying evaporation device is formed with a plurality of communication ports in the conveying pipe, the sludge conveying evaporation device The feed pipe and the screw of the diameter is smaller toward the discharge means side, the screw is characterized in that the pitch (pitch) of the transfer blade formed on the outer peripheral surface becomes smaller toward the discharge means side.

The sludge conveying evaporator is composed of a sprocket on both sides and a belt wound on the sprocket and rotated, the belt of the sludge conveying evaporator is formed with a plurality of transfer plates protruding vertically, the belt of the sludge conveying evaporator A plurality of communication ports are formed, and the organic sludge supplied by the supply means is in contact with the bottom surface of the oil-vapor evaporation drying tank by the conveying plate of the belt rotated by the sprocket.

The supply means is characterized in that the piston reciprocating vertically with the supply port of the storage hopper.

The feed hole diameter of the storage hopper is characterized in that larger than the diameter of the supply pipe connecting between the supply means and the sludge feed evaporator.

The upper portion of the oil-vapor evaporation drying tank is characterized in that it further comprises a condenser for condensing water discharged from the organic sludge to discharge to the outside.

When the organic sludge or lower hydrocarbon compound introduced into the oil-evaporation drying tank comes into contact with the oil at high temperature, a large amount of bubbles are generated as the surface and the inside of the sludge evaporate momentarily, so that a strong buoyancy acts on the organic sludge. However, due to the sludge transport evaporation device, organic sludge is prevented from rising and organic sludge can be transported at a constant speed, thereby enabling continuous operation.

In addition, when organic sludge is buried on land, methane (CH4), which is discharged from global warming gases, is suppressed and organic sludge, which is evaporated and dried, is used as a solid fuel of high calorific value, thereby reducing greenhouse gases.

In addition, the organic sludge dried using the oil-vapor evaporation drying method can be used as a fuel and a raw material for the alternative bituminous coal in cement kilns, depending on the properties of the minerals and heavy metals contained in the sludge, and the sludge containing some harmful heavy metals is subjected to high temperature pyrolysis. When the melting method is used to produce high-quality synthesis gas, and heavy metals and inorganic materials are discharged into the molten slag and vitrified, there is an effect of "zero emission" technology that can be used as aggregate for mortar.

Hereinafter, the organic sludge in-oil evaporation drying apparatus of the present invention as described above will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram of a first embodiment of the oil-in-vapor drying apparatus of the present invention, Figure 2 is a conceptual diagram of a second embodiment of the oil-in-vapor drying apparatus of the present invention, Figure 3 is a perspective view of A, B of Figure 1, Figure 4 Is a perspective view of the belt and the transfer plate of FIG.

Organic sludge in-oil evaporation drying apparatus of the present invention, as shown in Figure 1 to 2, sludge storage hopper 10 for storing organic sludge or lower hydrocarbon compounds; An oil storage tank 50 in which oil is stored for evaporative drying of organic sludge or lower hydrocarbon compounds; Oil-evaporated drying tank 40 in which oil supplied from the oil storage tank 50 is heated to an appropriate temperature, and evaporated and dried organic sludge or a lower hydrocarbon compound by heated oil; Supply means 20 for discharging the organic sludge or the lower hydrocarbon compound from the supply port 12 at the bottom of the storage hopper 10; A sludge conveying evaporator (30) for supplying organic sludge or lower hydrocarbon compound supplied by the supply means (20) to the oil-evaporation drying tank (40) and evaporating to dry it; And discharge means (60) for discharging the dry sludge or lower hydrocarbon compound evaporated water passing through the oil-vapor evaporation drying tank 40 by the sludge transfer evaporation device (30); It is made, including.

The storage hopper 10 has a water content of about 40 to 90%, and stores various organic sludges or lower hydrocarbon compounds such as sewage sludge, wastewater sludge, food waste, and livestock manure containing 5 to 50% of organic components. At the bottom, a feed port 12 through which organic sludge or a lower hydrocarbon compound is discharged is formed.

A supply means 20 for supplying the organic sludge discharged to the sludge transport evaporation apparatus 30 is formed in the supply port 12 at the bottom of the storage hopper 10. The supply means 20 is formed of a piston reciprocating vertically with the supply port 12. As the supply means 20 is reversed, the supply port 12 is completely opened to discharge organic sludge as high as the height of the supply means 20, and as the supply means 20 is advanced, the supply port ( The organic sludge discharged through 12) is pushed to one side. The pushed-out organic sludge is compressed by contacting the wall surface perpendicular to the longitudinal direction of the supply means 20 by the advancing supply means 20 to become a solid having a predetermined size. In the than the diameter (L ₁₎ it has a diameter (L ₂₎ of the supply pipe (14) connecting the supply means 20 and the sludge feed evaporator 30 of the supply port 12 at the bottom of the storage hopper (10) zoom is preferably formed (L _1> L _2). Therefore, as the organic sludge discharged from the storage hopper 10 is compressed into a small volume in contact with the wall surface as the supply means 20 moves forward, the sludge transfer evaporation apparatus 30 can be supplied through the supply pipe 14.

The oil storage tank 50 stores various oils such as copper, vegetable oil, biofuel production by-products such as glycerol, fuel oil or oil waste. One side of the oil storage tank 50 is provided with an oil-evaporation drying tank 40 in which the oil supplied from the oil storage tank 50 is heated to react with organic sludge.

The oil-evaporated drying tank 40 is supplied with the oil supplied from the oil storage tank 50, the oil introduced by a heating means (not shown) is heated to about 120 ~ 170 ℃.

The organic sludge discharged by the supply means 20 is supplied to the sludge conveying evaporator 30 through the supply pipe 14. 1 to 2 is an embodiment of the sludge feed evaporation apparatus, Figure 1 is a method by the rotation of the screw, Figure 2 is a method by the rotation of the belt wound on the sprocket.

As shown in FIG. 1, the sludge conveying evaporation apparatus 30 includes a cylindrical conveying tube 32 and a screw 33 provided along the longitudinal direction of the conveying tube 32 inside the conveying tube 32. One end of the transfer pipe 32 is connected to the lower end of the supply pipe 14 through which the organic sludge is supplied by the supply means 20, and the other end extends to the other side wall of the oil-vapor evaporation drying tank 40. As shown in Figure 3 (a), a plurality of communication ports (32a) are formed in the transfer pipe 32, the oil in the oil-evaporation drying tank 40 is freely flowing in and out. The screw 33 provided inside the transfer pipe 32 is rotated by a driving means (not shown), and a spiral transfer blade 34 is formed on the outer circumferential surface along the longitudinal direction of the screw 33. . The diameter of the inner wall surface of the conveying pipe 32 and the diameter of the conveying blade 34 of the screw 33 are formed to be about the same, so that the organic sludge conveyed by the screw 33 is separated from the inner wall surface of the conveying pipe 32. It is desirable to allow better transfer by friction. The transfer pipe 32 is smaller in diameter toward the other side of the oil-in-oil evaporation drying tank 40. In addition, the pitch of the feed blades 34 on the outer circumferential surface of the screw 33 is also reduced. Therefore, the organic sludge conveyed by the screw 33 is mutually compressed by the diameter of the conveying pipe 32 and the pitch of the feed wing 34 is reduced toward the other side of the oil-in-vapor drying tank 40, the volume is reduced, There is an effect that is made of a solid of a predetermined size.

FIG. 2 shows that the organic sludge is transported by the rotation of the belt 37 wound on the rotating sprocket 36 as another embodiment of the sludge transporting evaporator. Two sprockets 36 which are rotated by driving means (not shown) are provided at both ends of the lower end of the oil-vapor evaporation drying tank 40. A belt 37 is wound around the sprocket 36 and rotated. A plurality of transfer plates 38 are formed in the belt 37 perpendicular to the longitudinal direction of the belt 37. As shown in FIG. 4, a plurality of communication ports 37a are formed in the belt 37 to facilitate the rise of moisture discharged from the organic sludge in contact with the hot oil. In addition, it is preferable to reduce the driving force of the sprocket 36 by forming a plurality of holes 38a in the transfer plate 38. The lower end of the supply pipe 14 to which the organic sludge is supplied to the sludge conveying evaporator 30 extends to the lower portion of the one sprocket so as to be in contact with the conveying plate 38 on which the organic sludge rotates, and the oil-evaporation drying tank 40. It is lowered toward the bottom surface of the, by the continuous transport plate 38 is in contact with the bottom surface of the oil-vapor evaporation drying tank 40 is transported to the other side. In the above, the height of the transfer plate 38 is 50 ~ 200mm, the interval between the adjacent transfer plate 38 is formed of 100 ~ 500mm. This prevents organic sludge from rising due to buoyancy due to bubbles generated during the evaporation of organic sludge, and it is easy to adjust the time that organic sludge is evaporated to dry due to the transfer plate 38 at regular intervals. Solid fuel production is possible.

The other side of the oil-evaporated drying tank 40 is provided by the sludge transfer evaporator 30, the discharge means 60 is provided for discharging the dry sludge in which water in the organic sludge is replaced by oil. The discharge means 60 is composed of a cylindrical discharge pipe 62 and a screw 64 provided inside the discharge pipe 62, as shown in Figure 3 (b), the outer peripheral surface of the screw 64 is spiral Discharge wing 66 is formed. The upper discharge blade 66 is formed with a plurality of holes (66a) and the excess oil buried on the surface of the dry sludge conveyed upward by the screw 64 is not discharged to the outside, the oil-evaporation drying tank 40 It is desirable to prevent the rapid consumption of oil by refeeding oil. In addition, the discharge means 60 is formed by forming a small diameter of the discharge pipe 62 and the pitch (pitch) of the discharge wing 66 toward the top so that the discharged dry sludge is made into a solid of a predetermined size, dry sludge It is good to eliminate the separate means for forming the solid body.

The upper portion of the oil-vapor evaporation drying tank 40 is provided with a condenser 70 for condensing moisture discharged from the organic sludge and discharged to the outside. The condenser 70 allows a flow path 74 through which water of low temperature flows through the pump 72 to pass through the condenser 70 so that hot steam discharged from the organic sludge passes through the flow path 74. Heat exchange with water to allow condensation into water. Moisture condensed with water may contain harmful chemical components contained in the organic sludge, it is preferable to be discharged to the outside through a separate purification means (not shown).

It describes the process of drying the organic sludge using the oil-in-oil evaporation drying apparatus configured as described above.

Various organic sludges or lower hydrocarbon compounds, such as sewage sludge, wastewater sludge, food waste or livestock manure, having a water content of about 40 to 90% and having 5 to 50% of organic matter, are stored in the storage hopper 10. By the operation of 20) it is discharged through the supply port 12 at the bottom. As the supply means 20 is reversed, the organic sludge discharged through the supply port 12 is transported as the supply means 20 moves forward, and is made into a solid having a predetermined size in contact with a wall, and the lower portion is supplied through the supply pipe 14. It is supplied to the sludge transport evaporation apparatus (30). The supplied organic sludge comes into contact with the conveying plate 38 by the rotation of the screw 33 or by the rotation of the belt 37, and is transported to the oil-evaporation drying tank 40. The oil supplied from the oil storage tank 50 is previously heated to 120 to 170 ° C. by a heating means (not shown) in the oil-evaporation drying tank 40. The organic sludge conveyed by the sludge conveying evaporation device 30 is in contact with the oil heated to 120 ~ 170 ℃, the moisture of the surface of the organic sludge is instantaneously evaporated, the moisture inside the organic sludge and the heated oil and The liquid-solid conduction heat transfer occurs by the contact of, and the temperature inside the organic sludge is rapidly increased, and the water contained in the organic sludge is discharged to the outside at high pressure and evaporated. In this process, moisture in the organic sludge is evaporated, and a plurality of voids are generated in the organic sludge and negative pressure is generated instantaneously. As a result, oil having a high calorific value penetrates into the pores in which moisture is evaporated. The organic sludge is preferably in contact with the oil in the oil-in-vapor drying tank 40 for 5 to 20 minutes according to the water content so that the substitution of water and oil in the organic sludge is better, and the dried sludge is 1 to 15%. The moisture content is about 4,000 ~ 6,000 kcal / kg. The dried and completed dry sludge is conveyed to the discharge means 60 by the sludge conveying evaporation device 30 and conveyed upward by the screw 64, and the oil on the surface is supplied to the oil-evaporation drying tank 40 again, and the discharge means. It is pressed by the made of a solid of a predetermined size is to be discharged to the outside. In this process, the water discharged from the organic sludge flows into the condenser 70 at the top of the oil-in-vapor drying tank 40 and is condensed into water by heat exchange with water of low temperature and discharged to the outside.

The dry sludge produced by the above process can be used as a fuel and raw material instead of good bituminous coal in cement kilns according to the properties of inorganic and heavy metals contained in the sludge, and sludge containing some harmful heavy metals has a high temperature pyrolysis melting method. When used, it is possible to produce high-quality synthesis gas, and heavy metals and inorganic materials are discharged into molten slag, and when vitrified, there is an effect of "zero emission" technology that can be utilized as aggregate for mortar.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not satisfy all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be variations and variations.

1 is a conceptual diagram of a first embodiment of a water-in-oil evaporation drying apparatus of the present invention.

Figure 2 is a conceptual view of a second embodiment of the oil-in-oil evaporation drying apparatus of the present invention.

3 is a perspective view of A and B of FIG.

4 is a perspective view of the belt and the transfer plate of FIG.

** Description of the symbols for the main parts of the drawings **

10: storage hopper 12: supply port

14: supply pipe

20: supply means

30: sludge conveying evaporation device 32: conveying pipe

32a: communication port 33: screw

34: feed wing 36: sprocket

37: belt 37a: communication port

38: transfer plate 38a: hole

40: evaporation drying tank

50: oil storage tank

60: discharge means 62: pump

64: screw 66: discharge wing

66a: hole

70: condenser 72: pump

74; Flow path

Claims (12)

A sludge storage hopper 10 in which organic sludge or lower hydrocarbon compounds are stored; Oil storage tanks used for evaporative drying of organic sludge or lower hydrocarbon compounds and containing oils consisting of at least one selected from copper, vegetable oils, biofuel production by-products including glycerol, fuel oils or oil wastes. 50); Oil-evaporated drying tank 40 in which oil supplied from the oil storage tank 50 is heated to an appropriate temperature, and evaporated and dried organic sludge or a lower hydrocarbon compound by heated oil; Supply means 20 for discharging the organic sludge or the lower hydrocarbon compound from the supply port 12 at the bottom of the storage hopper 10; A sludge conveying evaporator (30) for supplying organic sludge or lower hydrocarbon compound supplied by the supply means (20) to the oil-evaporation drying tank (40) and evaporating to dry it; And Discharge means (60) for discharging the dry sludge or lower hydrocarbon compounds evaporated water passing through the oil-vapor evaporation drying tank 40 by the sludge transfer evaporation device (30); Including but not limited to, The sludge conveying evaporation apparatus 30 is composed of a cylindrical conveying pipe 32 and a screw 33 provided along the longitudinal direction inside the conveying pipe 32, a plurality of communication holes in the conveying pipe (32) 32a is formed, The conveying pipe 32 and the screw 33 of the sludge conveying evaporation apparatus 30 is smaller in diameter toward the discharge means 60 side, the screw 33 is formed on the outer peripheral surface toward the discharge means 60 side Organic sludge in-oil evaporation drying apparatus, characterized in that the pitch of the transfer blade (34) is reduced. delete delete delete delete The method of claim 1, The sludge conveying evaporation apparatus 30 is an organic sludge in-oil evaporation drying apparatus, characterized in that consisting of a sprocket (36) on both sides and a belt (37) wound and rotated on the sprocket (36). The method of claim 6, Organic sludge in-oil evaporation drying apparatus, characterized in that the belt 37 of the sludge conveying evaporation device (30) is formed with a plurality of transfer plates (38) protruding vertically. The method of claim 7, wherein Organic sludge in-water evaporation drying apparatus, characterized in that a plurality of communication holes (37a) is formed in the belt (37) of the sludge conveying evaporator (30). The method of claim 8, The organic sludge supplied by the supply means 20 is transported in contact with the bottom surface of the oil-vapor evaporation drying tank 40 by the transfer plate 38 of the belt 37 rotated by the sprocket 36. Organic sludge in-oil evaporation drying apparatus. The method according to any one of claims 1, 6, 7, 8, 9, The supply means (20) is organic sludge in-oil evaporation drying apparatus, characterized in that the piston reciprocating vertically with the supply port (12) of the storage hopper (10). The method of claim 10, The diameter L ₁ of the supply port 12 of the storage hopper 10 is larger than the diameter L ₂ of the supply pipe 14 connecting between the supply means 20 and the sludge feed evaporation apparatus 30. Organic sludge in-oil evaporation drying apparatus. The method of claim 11, Organic sludge in-water evaporation drying apparatus, characterized in that the upper portion of the oil-vapor evaporation drying tank 40 is further provided with a condenser (70) for condensing water discharged from the organic sludge to discharge to the outside.

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