KR100676867B1 - Treatment apparatus for dewatering cake - Google Patents

Abstract

An apparatus for treating dewatered cake which proceeds drying and fermentation of the dewatered cake automatically and continuously, and recycles the dewatered cake as compost through fermentation by primarily drying dewatered cake in a drying drum, secondly drying the dewatered cake while naturally transferring the primarily dried dewatered cake in multiple drying tanks, and then fermenting the secondly dried dewatered cake is provided. An apparatus for treating dewatered cake comprises: a first drying equipment(10) for drying the dewatered cake while rotating dewatered cake of sludge injected into a drying drum(20) through an injection hopper(11); a first transfer equipment(30) for transferring the dewatered cake primarily dried in the first drying equipment; a second drying equipment(40) comprising drying tanks(43,45,47) constructed in multistage to dry the dewatered cake while sequentially and naturally transferring the dewatered cake injected into the second drying equipment through the first transfer equipment; a dehumidification equipment(60) that provides the first drying equipment and the second drying equipment with a drying air for drying the dewatered cake; a second transfer equipment(70) for transferring the dewatered cake secondly dried in the second drying equipment; and a fermentation equipment(80) for fermenting and removing the dewatered cake transferred through the second transfer equipment.

Description

Treatment apparatus for dewatering cake

1 is a block diagram showing a dewatering cake processing apparatus according to the present invention,

Figure 2 is a block diagram showing a primary drying device of the dehydration cake processing apparatus according to the present invention,

3 is a configuration diagram showing a secondary drying apparatus of the dehydration cake processing apparatus according to the present invention,

Figure 4 is a schematic diagram showing the internal structure of the drying tank of the secondary drying apparatus in the present invention,

5 is a cross-sectional view taken along the line A-A of FIG. 4.

<Explanation of symbols for the main parts of the drawings>

10: primary drying device 11: input hopper

12: rotary valve 13: closing chute

15 input screw 16 supply pipe

17: exhaust pipe 19: support

20: drying drum 21: external drum

22: moving guide wing 23: the inner drum

24: moving guide wing 25: transfer bucket

27: discharge pipe 27a: circulation / discharge screw

29: outlet damper 30: primary transfer device

31: feed pipe 32: feed screw

40: secondary drying device 41: feed hopper

42, 44, 46, 48: rotary valves 43, 45, 47: drying tank

52: horizontal nozzle pipe 53: vertical nozzle pipe

60: dehumidifier 61: dry dehumidifier

61a: heater 61b: dehumidification rotor

64, 66: air supply piping 65, 67: exhaust piping

70: secondary conveying device 71: blower

72 transfer pipe 73 feeder

80 fermentation device 81 raw water supply pump

82: stirrer 83: distribution / discharge conveyor

84: sprayer 85: fermenter

86: leachate piping 87: raw water supply piping

88: blower 89: blower piping

90: raw water storage tank

The present invention relates to a dewatering cake processing device generated during a wastewater treatment process, and more particularly, to a dewatering cake processing device capable of fermenting a dewatering cake after drying.

In general, the treatment of sewage and manure, livestock wastewater, etc., dehydration cake is generated, dehydration cake is a sludge dehydrated to the extent that can be handled as a solid, it usually refers to a water content of 85% or less.

As such dewatered cakes are designated as wastes, and the problems of secondary costs and secondary pollutions are raised, most of them are treated with marine dumping, and marine pollution is intensifying. But this too is expensive.

In addition, the dehydration cake is composed of high moisture content and fine particles, there is a problem in poor mobility and easy to recycle as a fertilizer.

The present invention has been made in order to solve the above problems, the drying and fermentation of the dewatered cake by first drying the dewatered cake in a drying drum, secondary drying while transporting naturally in a multi-stage drying tank, and then fermented. It is an object of the present invention to provide a dehydration cake processing apparatus which allows the automatic and continuous fermentation and the fermentation of the dehydrated cake to be recycled as fertilizer.

Dewatering cake processing apparatus according to the present invention for realizing the above object, the first drying device for drying while rotating the sludge dewatering cake introduced into; A primary transporting device for transporting the dehydrated cakes first dried in the primary drying device; A secondary drying device having a multilayer structure such that the dewatered cake introduced through the primary transport device can be dried while being sequentially transported naturally; A dehumidifying apparatus for providing drying air to dry the dewatering cake to the first drying apparatus and the second drying apparatus; A secondary transport device for transporting the dehydrated cake secondary dried in the secondary drying device; It is characterized in that it comprises a fermentation device for fermenting the dehydration cake supplied through the secondary transfer device.

The primary drying apparatus includes a drying drum to which the dehydration cake is dried, a support for supporting the drying drum to be rotatable, driving means for rotating the drying drum, and one side of the drying drum to be dried. It is configured to include an inlet for injecting the dewatering cake into the drum, and a discharge portion provided on the other side of the drying drum is discharged from the dewatering cake dried in the drying drum.

The secondary drying apparatus is connected to the primary transfer device, the input hopper into which the dehydration cake is introduced, a plurality of drying tanks connected in series in the vertical direction to enable the natural transfer of the dehydration cake to the lower side of the input hopper, An input hopper, a plurality of valve mechanisms respectively provided between the respective drying tanks and the lowermost lower drying tanks, and an air supply pipe and an exhaust pipe connected to the respective drying tanks to supply or discharge the air supplied from the dehumidifying device. It is configured by.

The dehumidifying apparatus includes a dry dehumidifier using a heater and a dehumidifying rotor, and a circulating blower circulating drying air between the dry dehumidifier and the primary and secondary drying apparatuses.

The secondary conveying apparatus may be connected to a conveying pipe connected between the fermentation apparatus in the secondary drying device, and a dewatering cake connected to the inlet side of the conveying pipe by using the force of air. It is configured to include a blower so as to provide a blowing power.

The fermentation apparatus is a fermentation tank for fermentation of the dehydration cake supplied through the secondary transfer device, a distribution / discharge conveyor for dispensing or discharging the dewatering cake supplied from the secondary transfer device provided on the fermentation tank, the fermentation tank A stirrer provided in the agitating dehydration cake, a raw water supply device for supplying raw water into the fermentation tank, a leachate discharge pipe connected to a lower portion of the fermentation tank to discharge leachate therein, and a fermentation for supplying air into the fermentation tank It is configured to include a blower.

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

1 is a block diagram showing a dewatering cake processing apparatus according to the present invention.

As shown in this, the dewatering cake processing apparatus according to the present invention, the primary drying device 10 for drying while rotating the sludge dewatering cake introduced into the drying drum 20 through the input hopper 11, and the primary Drying tank (10) for transporting the dehydrated cake primarily dried in the drying device 10, and the drying tank so that the dewatered cake introduced through the primary transport device 30 can be naturally transported while being sequentially transported ( 43, 45, 47 is a dehumidification to provide a secondary drying apparatus 40 having a multi-layer structure, and drying air for drying the dewatering cake to the primary drying apparatus 10 and the secondary drying apparatus 40 The apparatus 60, the secondary conveying apparatus 70 for conveying the dehydrated cake secondary dried in the secondary drying apparatus 40 and the dehydrating cake conveyed through the secondary conveying apparatus 70 It consists of the fermentation apparatus 80 to process.

Referring to the main components of the dewatering cake processing apparatus according to the present invention in detail as follows.

2 is a block diagram showing the primary drying apparatus 10 of the dehydration cake processing apparatus according to the present invention.

As shown therein, the primary drying apparatus 10 includes a drying drum 20 through which a dehydration cake is dried, and a support 19 supporting the drying drum 20 so as to be rotatable through a support roller 18. ), A drum motor 26 which is a driving means for rotationally driving the drying drum 20, and one side (right side in the drawing) of the drying drum 20 are connected to the dehydration cake inside the drying drum 20. It is composed of an inlet (10A) for injecting, and an outlet (10B) is provided on the other side (left side in the drawing) of the drying drum 20 is discharged dehydrated cake dried in the drying drum (20).

The drying drum 20 is installed on the center of the outer drum 21 and the outer drum 21 rotatably supported by the support 19, both sides open so that the dehydration cake and drying air can pass through. The inner drum 23, the inner guide surfaces 22 and 24 provided on the inner side of the outer drum 21 and the inner drum 23 to move the dewatering cake in the drum, and the outer drum 21. Is provided on the discharge portion (10B) side is provided with a transfer bucket 25 that can be transferred to the inside of the inner drum 23 or through the discharge portion (10B) dehydration cake.

The inner drum 23 is preferably installed in a fixed position (20a) having a tripod structure in the outer drum 21, the transfer bucket 25 is inside the discharge pipe 27 to be described later It consists of a structure that can drop the dehydrated cake.

The drying drum 20 is an air supply pipe 16 so that the drying air supplied from the dehumidifier 60 is introduced into the inner drum 23 and then discharged through the outer drum 21. And an exhaust pipe 17 are provided. That is, the air supply pipe 16 is configured to extend through the outer drum 21 at the center of the input screw 15 to be described later to just before the inner drum 23, the exhaust pipe 17 is Located below the air supply pipe 16, it is configured to be connected to the outside from the side of the outer drum (21).

The moving guide vanes 22 and 24 are preferably formed on the inner surfaces of the inner drum 23 and the outer drum 21 so as to have a spiral guide structure so that the dehydrating cake moves in one direction. )

The movement guide vanes 22 and 24 of the outer drum 21 and the inner drum 23 are preferably formed in opposite directions so that the dewatering cake can be moved in the opposite direction.

The input portion 10A is an input hopper 11 into which a dewatering cake is introduced, an input chute 13 positioned in a vertical direction and connected from the input hopper 11 into the drying drum 20, and the input A rotary valve 12, which is a valve mechanism provided between the hopper 11 and the inlet chute 13 to open and close the inside, and is connected to the inside of the drying drum 20 at a lower part of the inlet chute 13 to provide a dehydration cake. It comprises an input screw 15 for conveying into the drying drum 20 and a motor 14 for driving the same.

The discharge portion 10B is connected to the outside from the inside of the drying drum 20, the inner portion of the drying drum 20 has a discharge pipe 27 made of a structure in which the top and the front open, and the discharge pipe 27 inside And a circulation / discharge screw 27a for circulating the dewatering cake introduced from the drying drum 20 back to the drying drum 20 or conveying the drying drum 20 to the outside while being rotated forward or reversely and driven therein. And a discharge damper 29 provided at an end of the discharge pipe 27 to block the discharge port.

Here, the rotary valve 12 of the inlet 10A and the outlet damper 29 of the outlet 10B are configured to seal the inside of the drying drum 20.

3 is a configuration diagram showing a secondary drying apparatus 40 of the dehydration cake processing apparatus according to the present invention, Figure 4 is a schematic diagram showing the internal structure of the drying tank of the secondary drying apparatus 40 in the present invention, 5 is a cross-sectional view taken along the line AA of FIG. 4.

As shown in FIG. 2, the secondary drying apparatus 40 is connected to the primary transfer device 30 so that an input hopper 11 into which a dehydration cake is introduced, and a natural nature of the dehydration cake on the lower side of the input hopper 11. Between the plurality of drying tanks 43, 45, 47 continuously connected in the vertical direction so as to be transported, between the input hopper 11 and the respective drying tanks 43, 45, 47, the lowermost drying tank 47. A plurality of rotary valves 42, 44, 46, and 48, respectively provided at a lower portion thereof, to enable a quantitative transfer of a dewatering cake and a blockage of external air, and connected to the respective drying tanks 43, 45, and 47. And a supply pipe 66 and an exhaust pipe 67 through which the air supplied from the device 60 is supplied or discharged.

In particular, as shown in FIGS. 4 and 5, the drying air supplied from the air supply pipe 66 is uniformly distributed in the drying tanks 43, 45, 47 in the drying tanks 43, 45, 47. Nozzle pipes 52 and 53 are provided.

The nozzle pipes 52, 53 are horizontal nozzle pipes 52 arranged in a circular or radial structure in a horizontal direction inside the drying tanks 43, 45, 47, and at the center of the horizontal nozzle pipes 52. It is preferable that it consists of the vertical nozzle pipe 53 connected perpendicularly to the lower side of each drying tank 43,45,47.

And the exhaust pipe 67 is preferably configured to be connected to the drying tank 43, 45, 47 in the upper portion of the air supply pipe (66).

Hereinafter, the primary transfer device 30, the dehumidification device 60, the secondary transfer device 70, and the fermentation device 80 will be described with reference to FIG. 1.

First, the primary transfer device 30 is provided with a transfer pipe 31 connected between the primary drying device 10 and the secondary drying device 40 and the inside of the transfer pipe 31 to provide a dehydration cake. Conveyor or a conveying screw 32 for conveying, and a conveying motor 33 for driving the conveyor or conveying screw (32).

Next, the dehumidifier 60 is a dry dehumidifier 61 using a heater 61a and a dehumidification rotor 61b, and between the dry dehumidifier 61 and the primary and secondary drying apparatuses 10 and 40. And a circulation blower 63 for circulating the air for drying.

Of course, between the dry dehumidifier 61 and the primary and secondary drying apparatuses 10 and 40, a circulation pipe consisting of the air supply pipes 64 and 66 and the exhaust pipes 65 and 67 is connected.

In the present embodiment, the dehumidifier 60 is configured as a dry dehumidifier 61, but not limited to this, it is possible to use a refrigeration cycle, or other dehumidification apparatus if the device to remove the water. .

Next, the secondary conveying apparatus 70 is connected between the fermentation apparatus 80 in the secondary drying apparatus 40 and the conveying pipe 72 to which the dehydration cake is conveyed, and the inlet side of the conveying pipe 72. A blower 71 connected to provide a blowing force to transfer the dewatered cake discharged from the secondary drying apparatus 40 by using the force of air, and is provided at an end of the transfer pipe 72. It consists of an injector 73 for feeding the dehydration cake into the fermentation apparatus (80).

Next, the fermentation apparatus 80 is provided on the fermentation tank 85 and the fermentation tank 85 is fermented to the dehydration cake supplied through the secondary transport device 70, the secondary transport device 70 Distribution / discharge conveyor 83 for distributing or discharging the supplied dewatering cake, a stirrer 82 provided in the fermentation tank 85 to agitate the dewatering cake, and supplying raw water for supplying raw water into the fermentation tank 85. A device 81, 87, 90, a leachate discharge pipe 86 connected to a lower portion of the fermentation tank 85 to discharge leachate therein, and a fermentation blower 88 for supplying air into the fermentation tank 85 are provided. It is configured to include.

The fermentation tank 85 is preferably provided with a porous portion 91 made of gravel and the like for the leachate discharge and air blowing.

Preferably, the distribution / discharge conveyor 83 has a screw structure that is rotated by a motor.

The raw water supply device includes a raw water supply pipe 87, a raw water storage tank 90 provided at the center of the fermentation tank 85, and a raw water supply pump 81 for supplying raw water stored in the raw water storage tank 90; It is provided with an upper portion of the fermentation tank 85 is composed of a sprinkler 84 to evenly spray the raw water supplied through the raw water supply pump 81.

Referring to the operation of the dehydration cake processing apparatus according to the present invention configured as described above are as follows.

First, when the dewatering cake generated in the wastewater treatment process is introduced into the drying drum 20 through the input hopper 11 of the primary drying apparatus 10, the dehumidifying cake is circulated inside according to the rotation of the drying drum 20. Drying is effected by the drying air supplied from the device 60.

That is, when the dewatering cake is introduced into the feed hopper 11, it is supplied into the drying drum 20 by the feed screw 15 through the opened rotary valve 12 and the feed chute 13.

When the introduction of the dehydration cake into the drying drum 20 is completed, the rotary valve 12 and the outlet damper 29 are closed to rotate the drum motor 26 in a state where the drying drum 20 is sealed, thereby drying the drying drum ( While rotating 20), the dehumidifying device 60 is operated to dry the dehydration cake while circulating the drying air into the drying drum 20.

At this time, the dewatering cake introduced into the drying drum 20 is moved to the right in the drawing by the movement guide blade 22 as the external drum 21 rotates while being inserted into the external drum 21. The moved dewatering cake is dropped into the circulation / discharge screw 27a by the transfer bucket 25. Since the circulation / discharge screw 27a is rotated in a circulating direction instead of discharging the dewatering cake, the dewatering cake is supplied into the inner drum 23, and the dewatering cake introduced into the inner drum 23 is a movement guide vane. By 24, it is dried while moving to the left direction in the figure.

On the other hand, the drying air supplied from the dehumidifying device 60 through the air supply pipe 16 flows into the inner drum 23 in the direction opposite to the traveling direction of the dewatering cake, and then passes through the inner drum 23. After passing through the inside of the outer drum 21, the exhaust pipe 17 is circulated back to the dehumidifying device 60.

 Therefore, the dewatering cake is circulated to the outer drum 21, the transfer bucket 25, the circulation / discharge screw 27a, the inner drum 23, and the outer drum 21, on the contrary, the drying air is supplied to the air supply pipe 16 ), The inner drum 23, the outer drum 21 is circulated in order to dry the dehydration cake.

As such, the dehydration cake dried by the operation of the primary drying device 10 has a water content of 80 to 83% to 68 to 70%, and also forms a round shape having a predetermined size in the circulation process.

Next, when the primary drying of the dewatering cake is completed as described above, when the outlet damper 29 is opened and the circulation / discharge screw 27a is rotated in the opposite direction to the above operation, the drying drum 20 The dewatering cake dropped from the transfer bucket 25 to the discharge pipe 27 as it rotates passes through the discharge pipe 27 and is supplied to the secondary drying device 40 via the primary transfer device 30 shown in FIG. 1. .

The dewatering cake supplied into the input hopper 11 at the outlet of the transfer pipe 31 of the primary transfer device 30 is introduced into the primary drying tank 43 through the primary rotary valve 42.

When the desired amount, that is, the quantity of dewatering cake is introduced into the primary drying tank 43, the upper and lower rotary valves 42 and 44 at the upper side and the lower side are closed, and the air supply pipe is supplied from the dehumidifying device 60. The dewatering cake is dried using the drying air supplied through (66).

In this case, since the drying pipe 43 is provided with nozzle pipes 52 and 53 as shown in FIGS. 4 and 5, the drying air is uniformly sprayed into the tank to dry the dewatering cake.

As described above, the dehydration cake is dried while being naturally transported to the secondary drying tank 45 and the tertiary drying tank 47 located below, depending on the degree of drying of the dewatering cake. It is completely dried at about 17%, maintains a round shape, has a certain strength, and is not easily deformed even by adding water.

On the other hand, after the air drying the dewatering cake in the primary drying device 10 and the secondary drying device 40 is introduced into the dry dehumidifier (61) through each exhaust pipe (17) (65) (67) After being dehumidified with hot dry air while passing through the heater 61a and the dehumidification rotor 61b, it is again supplied to the inside of each drying apparatus 10 and 40 through the supply pipes 64 and 66. FIG.

Next, the dewatered cake, which is secondarily dried as described above, is supplied to the fermentation apparatus 80 through the conveying pipe 72 by the force of air by the blower of the secondary conveying apparatus 70.

At this time, the dewatering cake introduced into the fermentation apparatus 80 is supplied while being evenly dispersed in the fermentation tank 85 by the distribution / discharge conveyor 83.

Thereafter, the raw water supply pump 81 is operated to spray and supply the raw water to the fermentation tank 85 at a water content of 75% according to the fermentation conditions, and operate the stirrer 82 to mix evenly. At this time, the raw water excessively supplied in the fermentation tank 85 is discharged to the outside through the leachate pipe 86.

When the fermentation preparation of the dewatering cake is completed as described above, when the air is supplied to the lower portion of the fermentation tank 85 through the blower pipe 89 by operating the blower 88, the dewatering cake is adapted to the fermentation conditions of water, air, and pH. Fermented, the fermented compost is discharged to the outside using the stirrer 82 and the distribution / discharge conveyor 83 to be used.

The dehydration cake processing apparatus according to the present invention configured and operated as described above, the first drying the dewatered cake in a drying drum, and then secondary drying while naturally transported in a multi-stage drying tank, fermented by the dried dehydrated cake as a fertilizer Since it is configured to be recycled, the drying and fermentation of the dehydrated cake is continuously operated automatically, thereby facilitating the treatment of the dehydrated cake and providing the advantage of easily recycling the dehydrated cake as a fertilizer.

Claims (6)

A primary drying device for drying while rotating the sludge dewatering cake introduced into the interior; A primary transporting device for transporting the dehydrated cakes first dried in the primary drying device; A secondary drying device having a multilayer structure or a single layer structure so that the dewatered cake introduced through the primary transfer device can be dried while being sequentially transported; A dehumidifying apparatus for providing drying air to dry the dewatering cake to the first drying apparatus and the second drying apparatus; A secondary transport device for transporting the dehydrated cake secondary dried in the secondary drying device; Dewatering cake processing device comprising a fermentation device for fermenting a dewatering cake supplied through the secondary transfer device. The method according to claim 1, The primary drying apparatus includes a drying drum to which the dehydration cake is dried, a support for supporting the drying drum to be rotatable, driving means for rotating the drying drum, and one side of the drying drum to be dried. An inlet for injecting a dewatering cake into the drum, and a discharge part provided at the other side of the drying drum to discharge the dewatering cake dried in the drying drum; The drying drum is provided with an external drum rotatably supported by the support, an inner drum installed at a central portion of the outer drum and open at both sides, and provided on the inner side of the outer drum and the inner drum, and having a dewatering cake in the drum. It includes a movement guide wing for moving; Dehydration cake processing device, characterized in that the other side of the outer drum is provided with a transfer bucket for transferring the dewatering cake to the inner or the discharge portion of the inner drum. The method according to claim 2, The drying drum is a dewatering cake processing device, characterized in that the air supply pipe and the exhaust pipe is installed so that the drying air supplied from the dehumidifying device is introduced into the inner drum and discharged through the outer drum. The method according to claim 2, The discharge part is connected to the outside from the inside of the drying drum, the inner portion of the drying drum has an upper and front open structure, and the dewatering cake introduced from the drying drum provided in the discharge pipe while rotating forward or reverse Dehydration cake processing apparatus comprising a circulation / discharge screw for circulating the inner back to the drying drum or transported to the outside of the drying drum. The method according to claim 1, The secondary drying apparatus is connected to the primary transfer device, the input hopper into which the dehydration cake is introduced, a plurality of drying tanks connected in series in the vertical direction to enable the natural transfer of the dehydration cake to the lower side of the input hopper, An input hopper, a plurality of valve mechanisms respectively provided between the respective drying tanks and the lowermost lower drying tanks, and an air supply pipe and an exhaust pipe connected to the respective drying tanks to supply or discharge the air supplied from the dehumidifying device. and, The air supply pipe is a dewatering cake processing device, characterized in that the horizontal nozzle pipe or vertical nozzle pipe for uniformly distributing the supplied drying air in the drying tank. The method according to claim 1, The fermentation apparatus is a fermentation tank for fermentation of the dehydration cake supplied through the secondary transfer device, a distribution / discharge conveyor for dispensing or discharging the dewatering cake supplied from the secondary transfer device provided on the fermentation tank, the fermentation tank A stirrer provided in the agitation dehydration cake, a raw water supply device for supplying raw water into the fermentation tank, a leachate discharge pipe connected to the lower fermentation tank for discharging leachate therein, and a fermentation for supplying air into the fermentation tank Dewatering cake processing device comprising a blower.

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