KR20120134563A - Equipment for drying organic sludge and system for manufacturing solid fual by using the equipment - Google Patents

Abstract

PURPOSE: An apparatus for drying organic sludge and a solid fuel manufacturing system are provided to reduce the possibility of environmental pollution by minimizing the dischargeable section of bad odor components. CONSTITUTION: An apparatus for drying organic sludge includes a case(101), a sludge inlet(102), a screw conveyor(103), a heating jacket(104), a sludge outlet(105), a vapor outlet(106), a vapor compressor(107), and a vapor-liquid separator(108). The sludge inlet is arranged at the upper side of the upstream of the case. The screw conveyor transfers introducing sludge to downstream. The heating jacket supplies heat to the sludge to be dried. The heating jacket is inscribed to the case. The heating jacket is movably circumscribed to the outer circumference of the screw conveyor. The sludge outlet is arranged at the lower side of the downstream of the case. The vapor outlet is arranged at the lateral upper side of the downstream of the case. The vapor compressor compresses vapor from the vapor outlet. The vapor-liquid separator separates condensed liquid from the compressed vapor and supplies the vapor without the condensed liquid to the heating jacket. [Reference numerals] (AA) Supplying sludge; (BB) Condensate; (CC) Dried sludge

Description

Equipment for drying organic sludge and system for manufacturing solid fual by using the equipment

The present invention relates to an apparatus for drying organic sludge and a solid fuel production system using the apparatus, in a drying process for recycling organic sludge having a high water content to solid fuel, by recycling steam generated while drying the sludge By using the sludge as a heat source for drying, the present invention relates to an apparatus for minimizing the energy input and efficient drying, and a solid fuel production system using the apparatus.

In general, organic sludge is a microbial residue generated during the treatment of water, industrial water, industrial wastewater, sewage, and manure, and most of them contain organic materials. Interest is on the rise.

The generation of domestic sewage and industrial wastewater is increasing greatly for various reasons, such as economic development, population growth, and improvement of living standards. Facilities are also inevitably increasing, and the amount of sludge, a secondary byproduct, is increasing.

Most of these organic sludges are treated by ocean dumping, and the rate of recycling is very low at around 10%, and according to the recent global movement regulating marine dumping, sludges treated with marine dumping on land have to be treated on land. Face to face.

Conventional sludge treatment and recycling methods include landfilling, solidification treatment, composting, carbonization, lightweight aggregate, and incineration treatment. Landfilling methods include groundwater contamination by leachate, weakening of the ground, and securing an area due to landfilling. Tea pollution is a serious problem.

The solidification treatment method is to inject a large amount of solidifying agent and use it as landfill material after curing for a certain period of time, but it requires a long curing period and requires a large installation site, and it is difficult to cope with the occurrence of odors. There are many regulations that need to be resolved and it is difficult to create demand sources.

In addition, the carbonization method and the lightweight aggregate method has a problem of very low economic efficiency.

The incineration method requires a lot of fuel costs for drying the water content within 20% so that it can be incinerated together with the installation cost of the facility, and it is economically inferior because of the need for a treatment facility for secondary air pollution.

Another way to recycle sludge is to dry the sludge and make it into solid fuel.

However, in order to recycle the sludge as solid fuel, the water content of the sludge should be lowered to less than 10% by weight. As a result, fuel cost and facility installation cost are high, resulting in low economic feasibility and odorous components of the sludge produced during the drying process. There is a problem that causes environmental pollution.

As such, the conventional sludge treatment and recycling method is difficult to efficiently treat due to the above problems, and is practically difficult to apply as an effective alternative for recycling to renewable energy.

The problem to be solved by the present invention is to dry organic sludge to produce a solid fuel, it is composed of a simple facility to reduce the installation cost and minimize the energy input to reduce the operating cost, efficient and economical drying To make it happen.

In addition, it is to provide an apparatus that can minimize the emission of odor components generated during the drying of the organic sludge to the outside.

The present invention provides a case 101 having an inner space, an inlet 102 for supplying sludge to an upper end of an upstream end of the case 101, a screw conveyor 103 for transferring the supplied sludge to a downstream end, and the case. A heating jacket 104 fixedly inscribed to 101 and circumscribed to the outer circumferential surface of the screw conveyor 103 so as to be able to slide and supplying heat to the sludge, and provided at a lower downstream end of the case 101 to be dried. Discharge port 105 for discharging the sludge, provided on the upper side of the downstream end of the case 101, steam generated by evaporation of moisture in the sludge introduced into the case 101 and steam discharged from the heating jacket 104 The outlet 106, the steam compressor 107 for compressing the steam discharged from the steam outlet 106 and the condensate in the vapor compressed by the steam compressor 107 is separated and discharged By including a gas-liquid separator 108 is supplied to chukaek the removed steam to the heating jacket 104 can solve the above problems.

In addition, the heating jacket 104 is a pair of dividing the inner space of the wall 111, the cylindrical structure having a space formed inside the donut-shaped cross-section into the lower space 112a and the upper space 112b. The partitions 113a and 113b and a pair of flow paths 114a and 114b formed at one side of each of the pair of partitions 113a and 113b, and the other front end surface of the upper space 112b includes the case ( The communication with the upper portion of the downstream end of 101) is preferable in that the operating cost is reduced by minimizing the input energy.

In addition, the upper space 112b of the heating jacket 104 is installed to extend to the steam outlet 106, the through hole 115 is provided between the upper space 112b and the upper portion of the downstream end of the case 101. It is more preferable in that it can perform drying of sludge smoothly.

In addition, the apparatus can be installed so that a plurality of screw conveyor 103 and the heating jacket 104 in parallel operation, it is preferable to operate at 85 ~ 95 ℃.

In addition, the present invention is the sludge supply unit 10 for storing the organic sludge, the primary dryer 20 to receive the organic sludge from the sludge supply unit 10 to dry by pressurization of the steam compressor 107, the primary dryer Secondary dryer 30 to receive the dried sludge of the (20) is dried by microwaves, the additive is supplied to the dried sludge of the secondary dryer 30 and increases the calorific value of the sludge from the additive supply unit 50 The additive mixing unit 40 to be supplied and mixed, the solidification unit 60 to receive the sludge mixed with the additive from the additive mixing unit 40 to form a solid fuel, and to store the solid fuel of the solidification unit 60 It includes a leachate storage unit 80 for storing the sludge leachate separated from the product storage unit 70 and the sludge supply unit 10, the primary dryer 20 and the secondary dryer 30,

The primary dryer 20 has a case 101 having an inner space, an inlet 102 for supplying sludge to the upper end of the case 101, and a screw conveyor for transporting the supplied sludge to the downstream end ( 103, a heating jacket 104 fixedly inscribed to the case 101 and slidably circumscribed with the outer circumferential surface of the screw conveyor 103 and supplying heat to the sludge, and below the downstream end of the case 101. The discharge port 105 is provided to discharge the dried sludge, provided in the upper side of the downstream end side of the case 101, the steam generated by the evaporation of water in the sludge introduced into the case 101 and the steam coming out of the heating jacket 104 The steam outlet 106 to discharge, the steam compressor 107 for compressing the steam discharged from the steam outlet 106 and the condensate in the steam compressed by the steam compressor 107 by separating the leachate It provides a solid fuel producing system comprising a gas-liquid separator 108 for carrying a feed (80) and the condensate is supplied to the removed steam to the heating jacket 104.

At this time, the water content of the sludge dried in the primary dryer 20 is 25 to 35% by weight, the water content of the sludge dried in the secondary dryer 30 is preferably less than 10% by weight.

In addition, the additive mixing unit 40 is at least one additive selected from the group consisting of sawdust, powdered activated carbon, coal tar, pearlite, ocher and magnesium based on the dried sludge of the secondary dryer 30 to 25 ~ It is preferable that it is a facility which mixes 35 weight%.

The drying device and the system for producing solid fuel according to the present invention have a relatively simple configuration and recycle steam as used in the drying process of the sludge to use as a heat source for drying the sludge, thereby minimizing the energy input and operating costs. .

In addition, there is an effect of reducing the possibility of environmental pollution even if the leakage of the device occurs by minimizing the discharge period of the odor component.

1 is a view showing a longitudinal cross-sectional view of a drying apparatus according to an embodiment of the present invention.
2 is a partial cross-sectional view of a heating jacket mounted inside the drying apparatus.
3 is a view showing a longitudinal cross-sectional view of a drying apparatus according to another embodiment of the present invention.
Figure 4 is a block diagram showing an embodiment of a system for producing an organic sludge solid fuel using the drying device.

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

In describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a longitudinal cross-sectional view of the drying apparatus according to an embodiment of the present invention as 100.

The drying apparatus 100 is a facility for removing moisture by drying the supplied organic sludge, a case 101 having an inner space, an inlet 102 provided at the upper end of the case 101, the sludge is supplied, Screw conveyor 103, which transfers the supplied sludge to the downstream end, is fixedly inscribed in the case 101 and circumscribed to the outer peripheral surface of the screw conveyor 103 so as to be slidable, and supplies heat to the sludge to dry Moisture in the sludge introduced into the jacket 104, the discharge port 105 provided in the lower downstream of the case 101, the discharge port 105 to discharge the dried sludge, the downstream side of the case 101 is introduced into the case 101 evaporates The steam discharge port 106 for discharging the steam generated from the steam and the heating jacket 104, the steam compressor 107 for compressing the steam discharged from the steam outlet 106 It includes a gas-liquid separator (108) for discharging the separated condensate in the compressed vapor from the vapor compressor 107 and the condensed liquid is supplied to the removed steam to the heating jacket 104.

2 is a partial cross-sectional view of a heating jacket 104 in accordance with one embodiment of the present invention.

The heating jacket 104 includes a pair of partitions for dividing the inner wall of the cylindrical structure 111 and the inner space of the wall 111 into a lower space 112a and an upper space 112b. And a pair of flow paths 114a and 114b formed at one side of each of the 113a and 113b and the pair of partitions 113a and 113b, and the other end surface of the upper space 112b is the case 101. It has a structure in communication with the upper portion of the downstream end of the.

That is, the vapor from which the condensate is removed from the gas-liquid separator 108 is introduced into the other lower space 112a of the heating jacket 104, and the lower space 112a of the heating jacket 104 is formed by the partitions 113a and 113b. ) Flows to one side, and flows from one side to the other side along the upper space 112b of the heating jacket 104 via flow paths 114a and 114b formed on one side of the heating jacket 104 of the upper space 112b. The upper end surface is opened to the upper downstream end of the case 101, and the water in the sludge introduced into the case 101 is provided on the upper side of the downstream end of the case 101 together with steam generated by evaporation. It enters the steam compressor 107 through the steam outlet 106.

Since water evaporation in the sludge introduced into the case 101 proceeds more as the degree of vacuum in the case 101 increases, it is advantageous to increase the degree of vacuum in the case 101 to dry the sludge.

To this end, the upper space 112b of the heating jacket 104 is installed to extend to the steam outlet 106, and a through hole 115 is provided between the upper space 112b and the upper portion of the downstream end of the case 101 ( 3), a nozzle of an ejector (ejector) for forcing the steam at the downstream end of the case 101 to the steam outlet 106 by the flow rate of the steam flowing through the through-hole 115 in the upper space (112b). By carrying out the role, the degree of vacuum in the case 101 can be further increased.

In addition, the drying apparatus 100 has one end connected to the steam outlet 106 and the other end connected to a suction port of the steam compressor 107 so as to be circulated with each other, one end of the steam compressor A second pipe L2 connected to the discharge port of 107 and the other end connected to the gas-liquid separator 108 so as to be circulated with each other, one end of which is connected to the gas-liquid separator 108, and the other end of the heating jacket 104 A third pipe (L3) and one end connected to the other side of the lower space (112a) of the lower space 112 and one end thereof are connected to the gas-liquid separator 108, and the other end is connected to a tank (not shown) that stores the condensate and distributed to each other. It may include a fourth pipe (L4) possibly connected.

The screw conveyor 103 is rotated by the drive motor 109 connected on the axial extension line, and transports the sludge introduced into the upstream end of the case 101 to the downstream end.

In addition, the drying apparatus 100 may be provided with a steam trap (not shown) during the fourth pipe (L4) so that the steam of the gas-liquid separator 108 does not flow into the tank for storing the condensate, the steam is In order to prevent condensation during the passage of the heating jacket 104 to inhibit the movement of steam, pipes (not shown) may be installed as tanks for storing the condensate at one side of the lower space 112a of the heating jacket 104. One side of the drying apparatus 100 may be installed lower than the other side so that the condensed water is collected at one side of the lower space 112a of the heating jacket 104.

Since the lower portion of the upstream end of the case 101 has a space between the screw conveyor 103 and the case 101, the sludge supplied through the inlet 102 may be stagnated in the lower upstream end of the case 101, In order to prevent this, an auxiliary plate 116 external to the screw conveyor 103 may be added to the space.

In addition, it may be provided with auxiliary heating means (not shown) for raising the temperature of the drying apparatus 100 during the initial operation, and since the addition of such auxiliary heating means is a known technique, a detailed description thereof will be omitted.

In FIGS. 1 and 3, only one screw conveyor 103 and one heating jacket 104 are installed, respectively, but a plurality of drying apparatuses according to the present invention are installed in parallel or in parallel in a plurality of horizontal or vertical directions as necessary. It is also possible to increase the sludge throughput of 100).

Figure 4 is a block diagram showing an embodiment of a system for producing organic sludge as a solid fuel by using the drying apparatus 100.

As shown in FIG. 4, the apparatus for producing solid fuel according to the present embodiment includes a sludge supply unit 10, a primary dryer 20, a secondary dryer 30, an additive mixing unit 40, and an additive supply unit 50. ), The solidification unit 60, the product storage unit 70 and the leachate storage unit 80.

The sludge supply unit 10 is a facility for storing organic sludge such as sewage sludge and purified water sludge brought in from the outside, and transporting them to the primary dryer 20. The sludge supply unit 10 is a sealed structure to prevent odors from leaking to the outside. The sludge leachate generated is collected in the lower part.

Means for conveying the sludge from the sludge supply unit 10 to the primary dryer 20 can be conveyed through a conventional screw conveyor, a mono pump or a piston pump, such conveying means is common knowledge in the art to which the present invention belongs. It is a well-known technique that can be easily carried out by those skilled in the art and can be changed freely as necessary, and thus, specific limitations on the present invention are not made.

The primary dryer 20 is the first drying sludge supplied from the sludge supply unit 10 using the drying apparatus 100 described above, the primary dried sludge discharged from the primary dryer 20 Is secondary dried in a secondary dryer (30).

The secondary dryer 30 is a drying facility for removing moisture inside the sludge using microwaves generated through a magnetron, which is an electromagnetic heating means, by infiltrating microwaves into the sludge to vibrate moisture. Heat is generated to evaporate moisture.

Moisture evaporated in the secondary dryer 30 is transferred to the leachate storage unit 80, the dried sludge is transferred to the additive mixing unit 40, the additive for increasing the calorific value of the sludge from the additive supply unit 50 The sludge dried and supplied to the additive mixing unit 40 is mixed with the additive.

The sludge and the additive mixed in the additive mixing unit 40 is transferred to the solidification unit 60 is manufactured as a solid fuel of a suitable form such as pellet form, powder form according to the use, the solid fuel is product storage unit 70 Is transferred to and stored.

The leachate separated from the sludge in the sludge supply unit 10, the primary dryer 20 and the secondary dryer 30 is collected in the leachate storage unit 80 to be treated separately.

The secondary dryer 30, the additive mixing unit 40, the additive supply unit 50, the solidification unit 60, the product storage unit 70 and the leachate storage unit 80 are conventional in the art. Since a person of ordinary skill in the art can select and implement an enemy, a detailed description thereof will be omitted.

The drying apparatus of the present invention and the solid fuel production system using the apparatus configured as described above are operated as follows.

Organic sludge such as sewage sludge, purified sludge, etc. introduced from the outside is first stored in the sludge supply unit 10, which usually contains 70 to 80% by weight of water, so that the leachate is separated from the sludge during storage and is collected at the bottom. , Leachate accumulated in the lower portion is sent to the leachate storage unit 80 is processed.

The sludge of the sludge supply unit 10 is transferred to the primary dryer 20, that is, the inlet 102 of the drying apparatus 100 and supplied to the upstream end of the case 101.

The sludge supplied to the upstream end of the case 101 is moved from the upstream end to the downstream end by the rotation of the screw conveyor 103 driven by the drive motor 109, and is provided with a heating jacket provided on the outer circumferential surface of the screw conveyor 103 ( Indirect heating by 104 causes vapor in the sludge to evaporate.

The steam is introduced into the steam compressor 107 through the steam outlet 106 and the first pipe (L1) installed on the upper side of the downstream side of the case 101 and pressurized, the high temperature pressurized by the steam compressor 107, The high pressure steam is sent to the gas-liquid separator 108 via the second pipe L2 to remove condensed water in the steam.

The steam from which the condensed water is removed is introduced into the other side of the lower space 112a of the heating jacket 104 via the third pipe L3, and moves to the one side from the other side of the lower space 112a to the screw conveyor 103. The sludge moving from the upstream end to the downstream end is indirectly heated through the inner wall surface of the heating jacket 104.

The steam moved to one side of the lower space 112a of the heating jacket 104 is introduced into one side of the upper space 112b through the flow paths 114a and 114b, and moves from one side of the upper space 112b to the other side, while the screw conveyor ( The sludge moving from the upstream end to the downstream end by 103 is again indirectly heated through the inner wall surface of the heating jacket 104.

As described above, the high temperature steam transferred from the gas-liquid separator 108 is first introduced into the other side of the lower space 112a of the heating jacket 104 and moved to one side, so the temperature gradient of the lower space 112a is higher than the other side. do.

The sludge introduced into the drying apparatus 100 is moved from the upstream end to the downstream end by the screw conveyor 103, and is moved by occupying the lower space of the screw conveyor 103 by its own weight, as described above. Since the lower space 112a of the 104 has a structure in which the temperature rises from one side to the other side, the sludge moving from the upstream end to the downstream end also gradually increases in temperature, thereby efficiently heating the sludge.

Steam emitted from the other end surface of the upper space 112b and the steam generated from the sludge heated by the heating jacket 104 are the steam outlet 106 and the first pipe (L1) installed on the upper side of the downstream end of the case 101. ) Is introduced into the steam compressor 107 via the suction chamber of the steam compressor 107. The vacuum is introduced into the case 101 through the first pipe L1 and the steam outlet 106. Form.

The vacuum environment of the sludge lowers the evaporation temperature of the sludge from 100 ℃ to 85 ~ 95 ℃, thereby generating more steam from the sludge improves the drying efficiency in the drying apparatus 100, thus drying device 100 Drying in the evaporation is made only by pressurization of the steam compressor 107 can minimize the energy input to the drying heat source.

In particular, as shown in FIG. 3, the upper space 112b of the heating jacket 104 extends to the vapor discharge port 106, and a through hole between the upper space 112b and the upper portion of the downstream end of the case 101. When 115 is provided, the vacuum in the case 101 is further increased, so that the drying efficiency in the drying apparatus 100 is further improved.

In addition, since most organic sludge is carbonized at a temperature of 100 ° C. or more, very strong odor is generated. When drying is performed at less than 100 ° C. under vacuum conditions, odor generation is reduced and drying is performed except for the discharge portion of the steam compressor 107. Since a vacuum is formed in most internal spaces of the apparatus 100, the discharge point of the odor is limited to the discharge portion of the steam compressor 107, so that even if a gap occurs in the drying apparatus 100, the odor does not leak to the outside at most positions. Odor generation is minimized.

In addition, the dried sludge is discharged from the lower space of the screw conveyor 103 to the discharge port 105 by gravity downward through the downstream lower space inside the case 101, and the upper space of the heating jacket 104 ( 112b) Steam generated from the steam and sludge exiting the other end surface and escaped through the upper space of the screw conveyor 103 to the steam outlet 106 upward through the downstream upper space in the case 101. Since the contact of the dried sludge and the steam is minimized, the moisture content of the dried sludge is prevented from being increased.

The steam is continuously circulated through the steam compressor 107, the gas-liquid separator 108, and the heating jacket 104, and the condensate contained in the steam is continuously discharged from the gas-liquid separator 108, and the moisture contained in the sludge evaporates as much as the discharge. Is replenished.

The moisture content of the dry sludge discharged through the discharge port 105 of the drying apparatus 100 is 25 to 35% by weight, and the dry sludge is transferred to the secondary dryer 30 and secondly dried by microwaves.

Microwave generated through magnetron is effective to remove odor because of strong sterilization power, and is absorbed well by water to vibrate water molecules inside the sludge so that they are heated by friction. It generates heat as it moves.

The water molecules moved to the outside are evaporated by the generated frictional heat and sent to the leachate storage unit 80, and the dried sludge is transferred to the additive mixing unit 40.

The water content of the sludge dried in the secondary dryer 30 is preferably less than 10% by weight, but if the moisture content of the dried sludge is 10% by weight or more, it is not preferable because recyclability as regeneration fuel such as auxiliary fuel is lowered.

The lower heating value of the secondary dried sludge is about 4000 kW / kg, and depending on the use, it may be restricted in using it as a solid fuel.

Therefore, it is necessary to increase the calorific value of the sludge. For this purpose, an additive for increasing the calorific value of the sludge from the additive supply part 50 is supplied to the additive mixing part 40 and mixed with the dry sludge transferred from the secondary dryer 30. do.

The additives include sawdust, powdered activated carbon, coal tar, pearlite, ocher, trace magnesium, and the like, based on the dry sludge transferred from the secondary dryer 30, by mixing 25 to 35% by weight of the additives to lower the calorific value of the sludge. It should not be less than ㎉ / ㎏.

The sludge mixed with the additives is transferred to the solidification unit 60 to be formed into pellets or uniformly pulverized according to the purpose to produce a solid fuel in powder form, and the solid fuel is transferred to the product storage unit 70 and stored. do.

The solid fuel may be used as renewable fuels such as auxiliary fuel for thermal power plants and secondary fuel for cement kilns, or may be used as soil improver or landfill cover material.

10: sludge supply unit, 20: 1 primary dryer, 30: secondary dryer, 40: additive mixing unit, 50: additive supply unit, 60: solidification unit, 70: product storage unit, 80: leachate storage unit,
100: drying apparatus, 101: case, 102: inlet, 103: screw conveyor, 104: heating jacket, 105: outlet, 106: steam outlet, 107: steam compressor, 108: gas-liquid separator, 109: driving motor,
111: wall, 112a: lower space, 112b: upper space, 113a: partition, 113b: partition, 114a: euro, 114b: euro, 115: through hole, 116: auxiliary plate
L1: first pipe, L2: second pipe, L3: third pipe, L4: fourth pipe

Claims (9)

A case 101 having an internal space, an inlet 102 provided at an upper end of the case 101 and a sludge supplied therein, a screw conveyor 103 for transferring the supplied sludge to a downstream end, and the case 101. A heating jacket 104 fixedly inscribed to the outer circumferential surface of the screw conveyor 103 so as to be slidable and supplied with heat to the sludge, and discharged from the sludge provided at a lower downstream end of the case 101. Discharge port 105 to be provided on the upper side of the downstream end of the case 101, the steam discharge port 106 for discharging the steam generated by the moisture in the sludge introduced into the case 101 and the steam coming out of the heating jacket 104 ), A steam compressor 107 for compressing the steam discharged from the steam outlet 106 and a condensate in the steam compressed by the steam compressor 107 is separated and discharged. The gas-liquid separator 108, the apparatus for drying the organic sludge containing for supplying a heating jacket 104 to the steam been removed. The method according to claim 1,
The heating jacket 104 includes a pair of partitions for dividing the inner wall of the cylindrical structure 111 and the inner space of the wall 111 into a lower space 112a and an upper space 112b. And a pair of flow paths 114a and 114b formed at one side of each of the 113a and 113b and the pair of partitions 113a and 113b, and the other end surface of the upper space 112b is the case 101. An apparatus for drying organic sludge, characterized in that it is in communication with the upper portion of the downstream end of the. The method according to claim 2,
The upper space 112b of the heating jacket 104 extends to the steam outlet 106, and a through hole 115 is provided between the upper space 112b and the upper portion of the downstream end of the case 101. An apparatus for drying organic sludge. The method according to claim 2,
The apparatus has a first pipe (L1) connected at one end to the steam outlet (106), the other end connected to a suction port of the steam compressor (107), and circulating with each other, and one end to a discharge port of the steam compressor (107). A second pipe L2 connected to the other end and connected to the gas-liquid separator 108 so as to flow to each other, one end of which is connected to the gas-liquid separator 108, and the other end of the lower space 112a of the heating jacket 104 is connected. A third pipe (L3) connected to the other side and circulated to each other and a fourth pipe (L4) connected at one end to the gas-liquid separator (108) and connected to a tank for storing the condensate at the other end to be connected to the other side; An apparatus for drying organic sludge, comprising: The method according to claim 1,
The apparatus is characterized in that a plurality of screw conveyor 103 and the heating jacket 104 is installed in parallel operation, the organic sludge drying apparatus. The method according to claim 1,
The apparatus for drying organic sludge, characterized in that the apparatus is operated at 85 ~ 95 ℃. Sludge supply unit 10 for storing the organic sludge, the primary dryer 20 to receive the organic sludge from the sludge supply unit 10 to dry by the pressure of the steam compressor 107, the drying of the primary dryer 20 The secondary dryer 30, which is supplied with the sludge and dried by microwave, is supplied with the dried sludge of the secondary dryer 30, and is supplied with an additive that increases the calorific value of the sludge from the additive supply unit 50, and mixes the additive. Mixing unit 40, a solidification unit 60 for receiving the sludge mixed with the additive from the additive mixing unit 40 to form a solid fuel, the product storage unit 70 for storing the solid fuel of the solidification unit 60 And leachate storage unit 80 for storing the sludge leachate is separated from the sludge supply unit 10, the primary dryer 20 and the secondary dryer 30,
The primary dryer 20 has a case 101 having an inner space, an inlet 102 for supplying sludge to the upper end of the case 101, and a screw conveyor for transporting the supplied sludge to the downstream end ( 103, a heating jacket 104 fixedly inscribed to the case 101 and slidably circumscribed with the outer circumferential surface of the screw conveyor 103 and supplying heat to the sludge, and below the downstream end of the case 101. The discharge port 105 is provided to discharge the dried sludge, provided in the upper side of the downstream end side of the case 101, the steam generated by the evaporation of water in the sludge introduced into the case 101 and the steam coming out of the heating jacket 104 The steam outlet 106 to discharge, the steam compressor 107 for compressing the steam discharged from the steam outlet 106 and the condensate in the steam compressed by the steam compressor 107 by separating the leachate The solid fuel producing system comprising a gas-liquid separator 108 for carrying a feed (80) and the condensate is supplied to the removed steam to the heating jacket 104. The method of claim 7,
The water content of the sludge dried in the primary dryer 20 is 25 to 35% by weight, the solid fuel production system, characterized in that the water content of the sludge dried in the secondary dryer 30 is less than 10% by weight. The method of claim 7,
The additive mixing unit 40 is 25 to 35 weight of at least one additive selected from the group consisting of sawdust, activated carbon, coal tar, pearlite, ocher and magnesium based on the dried sludge of the secondary dryer 30 Solid fuel manufacturing system, characterized in that the mixing equipment.

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