JP2010023024A - Vaporizing and drying device of organic sludge immersed in oil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vaporizing and drying device of organic sludge immersed in oil which can produce a sold fuel having a calorific value of 4,000-6,000 kcal/kg. <P>SOLUTION: The vaporizing and drying device of organic sludge immersed in oil includes a sludge storing hopper storing organic sludge or lower coal, an oil storage tank storing petroleum oil or waste oil for vaporizing and drying the organic sludge, a vaporizing and drying tank of oil in which the oil fed from the oil storage tank is heated at a proper temperature and the organic sludge is vaporized and dried with the heated oil, a feed means discharging the organic sludge through a feed opening at the lower end of the storing hopper to the outside, a sludge transfer device feeding the organic sludge fed by the sludge transfer means to the vaporizing and drying tank of oil to be vaporized and dried, and a discharge means discharging the dried sludge of which the water is vaporized through the vaporizing and drying tank of oil by the sludge transfer means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an oil-in-oil evaporative drying apparatus for organic sludge or lower coal having a water content of 30 to 90%, and oil sludges in which organic sludge or lower coal transferred to an in-oil evaporation tank is heated. Or, by contacting with various waste oils, the oil penetrates through the voids after the moisture of organic sludge or lower coal is discharged, producing a solid fuel with a calorific value of 4,000 to 6,000 kcal / kg It relates to a possible organic sludge oil evaporation drying apparatus.

  Generally, the organic sludge contained in a sewage treatment plant, a wastewater treatment plant, a garbage disposal plant, or livestock manure has a water content of about 40 to 90% and an organic component content of 5 to 50%. Therefore, when the moisture contained in the organic sludge is effectively removed, the calorific value reaches about 4,000 to 6,000 kcal / kg. When used alone or mixed with a fuel such as coal, a good quality It can be used as fuel. Alternatively, low-grade coals such as lignite and peat, and some lignite coals, have a high moisture content of 30 to 70%. If they are not dried, they will be used as high-calorie coal of 5,500 to 6,500 kcal / kg. I can't.

  As an example of a conventional dewatering device for dewatering the organic sludge, German Patent 948,497 discloses a continuously operated screen centrifuge, such as a sliding screen centrifuge, screw A method is disclosed in which wet solids that have been dewatered in a screen-type screen centrifuge or an integral casing centrifuge are dried by a drying device.

  The organic sludge dehydrated in this manner is subjected to a pulverization process in order to dry it to 90% by weight of a dry substance in a drying apparatus.

  As described above, as the dehydrating apparatus and the drying apparatus for reducing the moisture content are becoming more complicated and larger, there is a problem that a lot of equipment costs and operation costs are required. Further, due to the arsenic powder generated at the time of pulverization, the equipment must be periodically cleaned, and the solid fuel formed by drying has a problem that the calorific value is not so high.

  On the other hand, by-product waste including glycerol and gum generated as by-products in the biodiesel / ethanol production process has not been developed due to the rapid increase in the production of biodiesel, an alternative fuel for light oil, and its processing This is not only very difficult, but also increases the cost of environmental treatment, which places an economic burden on the management of the industrial body.

  In addition, oil components separated from the effluent during garbage disposal, animal fatty oils generated at slaughterhouses, and animal and vegetable fatty oil wastes generated at restaurants are currently deposited in sewer pipes. It is not only the main cause of increasing the treatment cost of the sewage treatment plant. Therefore, when these animal and vegetable fatty oils are collected and heated at a predetermined temperature, they become liquid, so that organic sludge can be used as oil for evaporating and drying in oil.

  As of 2006, the use of glycerol sewage sludge and 20,000 tons of biodiesel / ethanol by-products generated annually in Korea as the main raw materials and the utilization of national resources. Organic that contributes to growth, reduces environmental pollution in the environment, and reduces the source of sewage through unauthorized discharge of biodiesel / ethanol waste and provides alternative fuels to improve economy Development of a solid fuel production apparatus using sludge is demanded.

German Patent No. 948,497

  The present invention has been derived in order to solve the above-mentioned problems. The object of the present invention is to provide various animal and vegetable fatty oils, by-product waste from biofuel production, and petroleum oils for fuel. Applying a method for evaporating and drying in oil, which can evaporate and dry organic sludge or lower hydrocarbon compounds with various properties in a short time using various waste oils generated in industrial bodies, including automobiles. Another object of the present invention is to provide an organic sludge evaporative drying apparatus that can produce a solid fuel using organic sludge having a moisture content of 30 to 90% or lower coal.

The apparatus for evaporating and drying in organic sludge oil of the present invention includes a sludge storage hopper in which organic sludge or lower hydrocarbon compounds are stored; an oil storage tank in which oil for evaporating and drying organic sludge is stored; The oil supplied from the storage tank is heated to an appropriate temperature, and the organic sludge is evaporated and dried by the heated oil. The organic sludge is discharged from the supply port at the lower end of the storage hopper. A supply means; a sludge transfer evaporation apparatus for supplying the organic sludge supplied by the supply means to the evaporative drying tank in oil and evaporating and drying; and a water content passing through the evaporative drying tank in oil by the sludge transfer evaporation apparatus. A discharge means for discharging the evaporated dry sludge to the outside.
At this time, the organic sludge may be, for example, any one or more selected from the group consisting of sewage sludge having a moisture content of 40 to 90%, wastewater sludge, livestock manure and garbage.
Further, the lower hydrocarbon compound may be, for example, any one or more selected from the group consisting of peat, lignite and lignite having a water content of 30 to 70%.
The sludge transfer evaporator comprises a cylindrical transfer pipe and a screw provided along the longitudinal direction inside the transfer pipe, and the sludge transfer evaporator has a plurality of communication ports formed in the transfer pipe, The diameter of the transfer pipe and the screw of the sludge transfer evaporation device decreases as it approaches the discharge means, and the pitch of the transfer blades formed on the outer peripheral surface decreases as the screw approaches the discharge means. The sludge transfer evaporator comprises a sprocket on both sides and a belt wound around the sprocket to rotate, and a plurality of transfer plates protruding vertically are formed on the belt of the sludge transfer evaporator, A plurality of communication ports are formed in the belt of the sludge transfer evaporator, and the organic sludge supplied by the supply means is The belt is transported in contact with the bottom surface of the in-oil evaporation drying tank by a belt transfer plate rotated by a sprocket.
The supply means is a piston that reciprocates in a direction perpendicular to a supply port of the storage hopper.
A diameter of the supply port of the storage hopper is larger than a diameter of a supply pipe connecting the supply means and the sludge transfer evaporator.
The upper part of the in-oil evaporation drying tank is further provided with a condenser for condensing moisture discharged from the organic sludge and discharging it to the outside.

  According to the above configuration, when the organic sludge put into the evaporative drying tank in oil comes into contact with high-temperature oil, the water on the surface and inside of the sludge instantly evaporates and a large amount of bubbles are generated. Strong buoyancy acts on the organic sludge, but the sludge transfer evaporator prevents the organic sludge from floating, and the organic sludge can be transferred at a constant speed. There is an effect that can.

In addition, when methane (CH ₄ ), which is a global warming gas emitted when landfilling organic sludge on land, is suppressed, and evaporatively dried organic sludge is used as a high-calorie solid fuel, greenhouse gases are defined. There is an effect that can be reduced periodically.

  Furthermore, organic sludge dried using the evaporative drying method in oil can be used as a raw material and as an excellent substitute for briquettes in cement kilns, depending on the properties of inorganic substances and heavy metals contained in the sludge. The sludge containing some toxic heavy metals can produce high-quality synthesis gas when using the high-temperature pyrolysis melting method, and heavy metals and minerals can be discharged as molten slag to become nitrified. There is an effect of “zero emission” technology that can be used as a material.

The conceptual diagram of Example 1 of the evaporative drying apparatus in oil of this invention. The conceptual diagram of Example 2 of the evaporative drying apparatus in oil of this invention. The perspective view of A and B of FIG. FIG. 3 is a perspective view of the belt and the transfer plate in FIG. 2.

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

  FIG. 1 is a conceptual diagram of Embodiment 1 of the in-oil evaporation drying apparatus of the present invention, FIG. 2 is a conceptual diagram of Embodiment 2 of the in-oil evaporation drying apparatus of the present invention, and FIG. FIG. 4 is a perspective view of the belt and the transfer plate of FIG. 2.

  As shown in FIGS. 1 and 2, the apparatus for evaporating and drying in organic sludge oil of the present invention includes a sludge storage hopper 10 in which organic sludge or lower coal is stored; petroleum oils for evaporating and drying organic sludge, or An oil storage tank 50 in which waste oil is stored; the oil supplied from the oil storage tank 50 is heated to an appropriate temperature, and the organic sludge is evaporated and dried by the heated oil; Supply means 20 for discharging organic sludge from the supply port 12 at the lower end of the storage hopper 10; sludge transfer evaporation for supplying the organic sludge supplied by the supply means 20 to the evaporative drying tank 40 and evaporating and drying it. Apparatus 30; and the dried sludge from which moisture has been evaporated by the sludge transfer evaporation apparatus 30 through the in-oil evaporation drying tank 40 is discharged to the outside. Detecting means 60; consisting of.

  The storage hopper 10 has a moisture content of about 30 to 90%, and stores various organic sludges such as sewage sludge, wastewater sludge, garbage or livestock manure containing 5 to 50% organic components, A supply port 12 through which organic sludge is discharged is formed at the lower end.

  A supply means 20 for supplying the discharged organic sludge to the sludge transfer evaporator 30 is formed at the supply port 12 at the lower end of the storage hopper 10. The supply means 20 is formed of a piston that reciprocates in the direction perpendicular to the supply port 12. When the supply means 20 moves backward, the supply port 12 is completely opened, and organic sludge corresponding to the height of the supply means 20 is discharged, and when the supply means 20 moves forward, the supply port 12 is The organic sludge discharged through the pipe is pushed out to one side. The extruded organic sludge is compressed in contact with the wall surface perpendicular to the longitudinal direction of the supply means 20 by the supply means 20 that advances, and becomes a solid body of a predetermined size. In the above, the diameter L1 of the supply port 12 at the lower end of the storage hopper 10 is formed larger than the diameter L2 of the supply pipe 14 connecting the supply means 20 and the sludge transfer evaporator 30 (L1> L2). Is preferred. Accordingly, the organic sludge discharged from the storage hopper 10 is compressed to a small volume in contact with the wall surface by the advancement of the supply means 20, so that the sludge transfer evaporator 30 is supplied via the supply pipe 14. Supply becomes possible.

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

  In the in-oil evaporation drying tank 40, the oil supplied from the oil storage tank 50 is introduced, and the inflowing oil is heated to about 120 to 170 ° C. by heating means (not shown).

  The organic sludge discharged by the supply means 20 is supplied to the sludge transfer evaporator 30 via the supply pipe 14. FIGS. 1 and 2 show an embodiment of the sludge transfer evaporation apparatus. FIG. 1 shows a system based on the rotation of a screw, and FIG. 2 shows a system based on the rotation of a belt wound around a sprocket.

  As shown in FIG. 1, the sludge transfer evaporator 30 includes a cylindrical transfer pipe 32 and a screw 33 provided in the transfer pipe 32 along the longitudinal direction of the transfer pipe 32. One end of the transfer pipe 32 is connected to the lower end of the supply pipe 14 to which organic sludge is supplied by the supply means 20, and the other end extends to the other side wall of the in-oil evaporation drying tank 40. As shown in FIG. 3A, a plurality of communication ports 32 a are formed in the transfer pipe 32, and oil can freely flow into and out of the in-oil evaporation drying tank 40. 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 peripheral surface along the longitudinal direction of the screw 33. The inner wall diameter of the transfer pipe 32 and the diameter of the transfer blade 34 of the screw 33 are formed in substantially the same manner, and the organic sludge transferred by the screw 33 is further improved by friction with the inner wall surface of the transfer pipe 32. It is preferable to be transported. The diameter of the transfer pipe 32 decreases as it approaches the other side of the evaporative drying tank 40 in oil. Further, the pitch of the transfer blades 34 on the outer peripheral surface of the screw 33 is also reduced. Accordingly, the organic sludge transferred by the screw 33 is pressed against each other by the diameter of the transfer pipe 32 and the pitch of the transfer blades 34 that become smaller toward the other side of the evaporative drying tank 40 in oil, and the volume is reduced. There is an effect of becoming a solid body of size.

  FIG. 2 shows another embodiment of the sludge transfer evaporator, in which organic sludge is transferred by the rotation of a belt 37 wound around a rotating sprocket 36. Two sprockets 36 rotated by driving means (not shown) are provided on both sides of the lower end of the in-oil evaporation drying tank 40. A belt 37 is wound around the sprocket 36 and rotates, and a plurality of transfer plates 38 are formed on the belt 37 perpendicular to the longitudinal direction of the belt 37. As shown in FIG. 4, the belt 37 is formed with a plurality of communication ports 37a for easily floating moisture discharged from organic sludge in contact with high-temperature oil. The transfer plate 38 is preferably formed with a plurality of holes 38a to reduce the driving force of the sprocket 36. The lower end of the supply pipe 14 to which the organic sludge is supplied to the sludge transfer evaporator 30 is extended to the lower part of the sprocket on the one side so as to come into contact with the transfer plate 38 on which the organic sludge rotates. The bottom of the middle evaporative drying tank 40 descends and is transferred to the other side in contact with the bottom surface of the in-oil evaporating and drying tank 40 by the transfer plate 38 that continues to rotate. In the above, the height of the transfer plate is 50 to 200 mm and the interval between the transfer plates is 100 to 500 mm, so that the transfer plate is prevented from being lifted by buoyancy due to bubbles generated in the evaporation process in the sludge oil. Therefore, the evaporative drying time can be easily adjusted, and a uniform solid fuel can be produced.

  On the other side of the in-oil evaporating and drying tank 40, there is provided discharging means 60 for discharging dried sludge that has been transferred by the sludge transfer evaporating device 30 and whose water in the organic sludge has been replaced with oil. As shown in FIG. 3B, the discharge means 60 includes a cylindrical discharge pipe 62 and a screw 64 provided inside the discharge pipe 62, and a spiral discharge blade is provided on the outer peripheral surface of the screw 64. 66 is formed. A plurality of holes 66a are formed in the discharge blade 66, and excess oil adhering to the surface of the dry sludge transferred upward by the screw 64 is not discharged to the outside, but is re-supplied to the in-oil evaporation drying tank 40 Thus, it is preferable to prevent rapid consumption of oil. Further, the discharge means 60 is formed such that the diameter of the discharge pipe 62 and the pitch of the discharge blades 66 become smaller toward the upper end, and the dried sludge discharged is pressed into a solid body of a predetermined size. Thus, it is preferable to eliminate a separate means for forming the dry sludge into a solid body.

  A condenser 70 for condensing moisture discharged from the organic sludge and discharging it to the outside is provided on the upper part of the in-oil evaporation drying tank 40. The condenser 70 is configured such that a flow path 74 in which low temperature water flows by the pump 72 passes through the inside of the condenser 70, so that hot steam discharged from the organic sludge passes through the flow path 74. Heat exchange with water so that it is condensed into water. The water condensed in the water may contain harmful chemical components contained in the organic sludge, so it is discharged to the outside through a separate purification means (not shown). It is preferable.

  A process in which organic sludge is dried using the in-oil evaporation drying apparatus configured as described above will be described.

  Various organic sludges 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% organic components stored in the storage hopper 10 are supplied by the supply means. 20 is discharged through the supply port 12 at the lower end. The organic sludge discharged through the supply port 12 by the backward movement of the supply means 20 is transported by the advancement of the supply means 20 and comes into contact with the wall surface to become a solid body having a predetermined size. 14 to the sludge transfer evaporator 30 at the lower end. The supplied organic sludge comes into contact with the transfer plate 38 by the rotation of the screw 33 or by the rotation of the belt 37 and is transferred to the in-oil evaporation drying tank 40. In the oil evaporation drying tank 40, the oil supplied from the oil storage tank 50 is preheated to 120 to 170 ° C. by heating means (not shown). When the organic sludge transferred by the sludge transfer evaporator 30 comes into contact with the oil heated to 120 to 170 ° C., the water on the surface of the organic sludge evaporates instantaneously, and the water inside the organic sludge However, liquid-solid conduction heat transfer occurs due to contact with heated oil, the internal temperature of the organic sludge rises rapidly, and the moisture contained in the organic sludge is discharged to the outside at a high pressure. And evaporated. In this process, water inside the organic sludge is evaporated, and a plurality of voids are formed inside the organic sludge, and a negative pressure is instantaneously generated. As a result, oil having a high calorific value penetrates into the voids where moisture has been evaporated. It is preferable that the organic sludge is brought into contact with the oil in the in-oil evaporation drying tank 40 for 5 to 20 minutes depending on the water content so that the water and oil in the organic sludge can be replaced more effectively. The dried sludge after drying exhibits a moisture content of about 1 to 15%, and the calorific value increases to about 4,000 to 6,000 kcal / kg. The dried sludge that has been dried is transferred to the discharge means 60 side by the sludge transfer evaporator 30 and transferred upward by the screw 64, and the oil on the surface is again supplied to the in-oil evaporation drying tank 40 and is pressure-bonded by the discharge means. Thus, it becomes a solid body of a predetermined size and is discharged to the outside. In this process, the water discharged from the organic sludge flows into the condenser 70 at the top of the in-oil evaporation drying tank 40, is condensed into water by heat exchange with the low temperature water, and is discharged to the outside. become.

  The dry sludge produced in the above process can be used as a raw material in cement kiln and as an excellent substitute for briquette, depending on the properties of inorganic substances and heavy metals contained in the sludge. Sludge containing harmful heavy metals can produce high-quality synthesis gas when using the high-temperature pyrolysis melting method, and heavy metals and minerals can be used as molten slag for nitrification. There is an effect of “zero emission” technology that can be used as a material.

  Terms and words used in this specification and claims should not be construed as limited to ordinary or lexicographic meanings, and the inventor should use terms to describe his invention in the best possible manner. In accordance with the principle that this concept can be appropriately defined, it must be interpreted into a meaning and concept consistent with the technical idea of the present invention. Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not satisfy all the technical ideas of the present invention. It should be understood that, at the time of filing, there can be various equivalents and variations that can be substituted for these.

10: Storage hopper 12: Supply port 14: Supply pipe 20: Supply means 30: Sludge transfer evaporation device 32: Transfer pipe 32a: Communication port 33: Screw 34: Transfer blade 36: Sprocket 37: Belt 37a: Communication port 38: Transfer Plate 38a: Hole 40: Evaporation drying tank in oil 50: Oil storage tank 60: Discharge means 62: Pump 64: Screw 66: Discharge feather 66a: Hole 70: Condenser 72: Pump 74: Flow path

Claims (14)

A sludge storage hopper 10 in which organic sludge or lower hydrocarbon compounds are stored;
Oil storage tank 50 in which petroleum oils for evaporative drying of organic sludge or lower hydrocarbon compounds, as well as various automobiles, industrial waste oil, animal and vegetable fatty oils, biodiesel by-products are stored;
An oil-in-oil evaporation drying tank 40 in which the oil supplied from the oil storage tank 50 is heated to an appropriate temperature, and organic sludge or lower coal is evaporated and dried by the heated oil;
Supply means 20 for discharging organic sludge or low-grade coal from the supply port 12 at the lower end of the storage hopper 10;
A sludge transfer evaporator 30 for supplying organic sludge or lower coal supplied by the supply means 20 to the in-oil evaporation drying tank 40 to evaporate and dry; and the in-oil evaporation drying tank 40 by the sludge transfer evaporation apparatus 30. The organic sludge in-oil evaporating and drying apparatus, comprising: a discharge means 60 for discharging dry sludge from which water has been evaporated or low-grade coal to the outside.   The organic sludge according to claim 1, wherein the sludge transfer evaporator 30 includes a cylindrical transfer pipe 32 and a screw 33 provided in the transfer pipe 32 along the longitudinal direction. Evaporative drying equipment in oil.   The organic sludge evaporative drying apparatus according to claim 2, wherein the sludge transfer evaporator 30 has a plurality of communication ports 32 a formed in a transfer pipe 32.   The organic sludge oil evaporation drying apparatus according to claim 3, wherein the diameter of the transfer pipe 32 and the screw 33 of the sludge transfer evaporation apparatus 30 decreases as it approaches the discharge means 60 side.   5. The organic sludge in-oil evaporation drying apparatus according to claim 4, wherein the screw 33 has a pitch of the transfer blades 34 formed on the outer peripheral surface as it approaches the discharge means 60 side.   2. The organic sludge evaporative drying apparatus according to claim 1, wherein the sludge transfer evaporator 30 includes a sprocket 36 on both sides and a belt 37 that is wound around the sprocket 36 and rotates.   The organic sludge in-oil evaporation drying apparatus according to claim 6, wherein a plurality of transfer plates (38) protruding vertically are formed on the belt (37) of the sludge transfer evaporation apparatus (30).   The organic sludge evaporative drying apparatus according to claim 7, wherein a plurality of communication ports 37a are formed in the belt 37 of the sludge transfer evaporator 30.   The organic sludge supplied by the supply means (20) is transferred in contact with the bottom surface of the in-oil evaporation drying tank (40) by a transfer plate (38) of a belt (37) rotated by the sprocket (36). 8. The organic sludge oil evaporation drying apparatus according to 8.   The evaporative drying in organic sludge oil according to any one of claims 1 to 9, wherein the supply means 20 is a piston that reciprocates in a direction perpendicular to the supply port 12 of the storage hopper 10. apparatus.   The diameter L1 of the supply port 12 of the storage hopper 10 is larger than the diameter L2 of the supply pipe 14 connecting the supply means 20 and the sludge transfer evaporator 30 according to claim 10. Evaporative drying equipment in organic sludge oil.   [12] The organic material according to claim 11, further comprising a condenser 70 in the upper part of the in-oil evaporation drying tank 40 for condensing moisture discharged from the organic sludge and discharging it to the outside. Evaporative drying equipment in basic sludge oil.   The organic sludge is any one or more selected from the group consisting of sewage sludge having a moisture content of 40 to 90%, wastewater sludge, livestock manure, and garbage. Evaporative drying apparatus in organic sludge oil described in 1.   The organic material according to claim 1 or 2, wherein the lower hydrocarbon compound is at least one selected from the group consisting of peat, lignite and lignite having a moisture content of 30 to 70%. Evaporative drying equipment in sludge oil.

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