KR200362836Y1 - Drying Apparatus of Sludge of Cool and Warm Form - Google Patents

Abstract

The present invention relates to a cold and sludge drying apparatus, comprising: a sludge drying apparatus for drying sludge introduced from a hopper, comprising: a plurality of conveying conveyors for drying the sludge fed from the hopper while being transported by rotation of a transfer screw; One end of the adjacent transfer conveyor is connected to discharge the sludge, the cold passage or hot air circulation passage; A motor for rotating the conveying screw of each conveying conveyor; A crusher selectively inserted into the connection passage to crush sludge; A cold / hot wind supply port provided at a side of the conveyer to supply cold or warm air into the conveyer; It is to include a forced exhaust device for forcibly evacuating the cold or warm air applied to the transfer conveyor, to increase the drying efficiency of the various sludge.

Description

Drying Apparatus of Sludge of Cool and Warm Form}

The present invention relates to a cold and hot sludge drying apparatus, and more particularly to a cold and hot sludge drying apparatus for effectively drying the water-containing sludge by cooling and / or heating.

Sludge is a sediment from sewage treatment or water purification, also called sludge. Sewage sludge contains about 50% organic matter, and the water content is difficult to treat because it is high from 96 to 98% of the initial settling sludge to 99 to 99.5% of the activated sludge. Until now, the sludge was stabilized by anaerobic treatment, and then disposed of by dehydration and landfilling. However, this method is difficult due to the increase in the amount of sludge, so that sewage sludge is directly mechanically dehydrated and then incinerated. In addition, methods such as wet oxidation or heat treatment are also used.

Purified sludge is mainly composed of turbidity and aluminum hydroxide, but may contain 20 to 30% of organic matter depending on raw water. Similar to sewage sludge, it has a moisture content of 98% or more, which makes it difficult to treat and dispose of it. In particular, sludge containing floc of aluminum hydroxide is difficult to dehydrate and concentrate. For this reason, more than a certain amount of purified sludge is subjected to sulfuric acid treatment to recover aluminum hydroxide to aluminum sulfate, and further improve dehydration.

The final treatment of the treated sludge is used as a building material or a road construction material, or as a fertilizer or feed, or by landfilling.

The conventional apparatus for drying various sludges has been mainly used to dry by applying hot air or the like using a transfer conveyor, but there is a problem that a large amount of treatment and effective water absorption cannot be performed.

Therefore, the present invention cools and / or heats sludge, such as food waste or industrial waste containing a large amount of moisture, through a multi-stage transfer conveyor to dry it in a solid state or a powder state, thereby allowing a large amount of treatment and effective drying. It is an object to provide a type sludge drying apparatus.

In addition, the present invention is another object to dry the high-quality sludge so that the sludge is not agglomerated during drying through a multi-stage transfer conveyor, to be crushed into a powder state through a crusher.

The present invention is a sludge drying apparatus for drying the sludge introduced from the hopper for the above purpose, a plurality of conveying conveyor for drying the sludge injected from the hopper while transported by the rotation of the transfer screw; One end of the adjacent transfer conveyor is connected to discharge the sludge, the cold passage or hot air circulation passage; A motor for rotating the conveying screw of each conveying conveyor; A crusher selectively inserted into the connection passage to crush sludge; A cold / hot wind supply port provided at a side of the conveyer to supply cold or warm air into the conveyer; It can be achieved by providing a cold and hot sludge drying apparatus comprising a forced exhaust device for forcibly exhausting the cold or hot air applied to the transfer conveyor.

1 is a front view showing the configuration of a cold-temperature sludge drying apparatus according to the present invention,

Figure 2 is a side view showing the operating state of the cold and hot sludge drying apparatus according to the present invention,

3 is a view showing a chain connection state according to the operation of the cold and hot sludge drying apparatus of the present invention,

Figure 4 is a view showing the structure of the transfer screw of the cold and hot sludge drying apparatus of the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: hopper 20: transfer conveyor

21: screw shaft 22: feed screw

23: support 24: water outlet

25: connecting passage 26: drain

27: ribbon screw 30: outlet

40, 42: crusher 50: hot and cold air supply port

60: forced exhaust 61, 62: exhaust pipe

70: motor 72: drive sprocket

74: driven sprocket 76: chain

77: chain support 80, 81: fixing member

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

1 is a view showing the front of the cold-temperature sludge drying apparatus of the present invention, Figure 2 is a view showing the side.

First, the present invention is a cold and hot sludge drying having a multi-stage conveying conveyor to dry, incinerate or recycle solid or powdered sludge by drying and pulverizing moisture contained in food waste, industrial waste, or sewage treated sludge. Device.

As a component of the present invention, the transfer conveyor 20 is to dry the sludge introduced from the hopper 10 while transferring the rotation of the transfer screw 22, the transfer conveyor 20 is connected to a plurality. That is, the transfer conveyor 20 is installed in the horizontal direction, the plurality of transfer conveyor 20 is connected and installed in the vertical direction.

The transfer conveyor 20 has a cylindrical shape, the screw shaft 21 is rotated in a predetermined direction by the rotational force supplied from the motor 70 is configured in the transfer conveyor 20. And a screw support 23 for supporting the transfer screw 22 to be wound around the screw shaft 21 at a predetermined interval is configured, the ribbon screw 27 between the screw 22a and the screw 22b of the transfer screw 22. ) Are connected (see FIGS. 4A and 4B).

In this way, the conveying conveyor 20 is installed on the screw shaft 21 so that the conveying screw 22 is supported by the support 23 to be rotated in a predetermined direction. The screw support 23 is connected between the screw shaft 21 and the conveying screw 22 in plurality so that the conveying screw 22 is rotated by the rotational force of the screw shaft 21. The ribbon screw 27 connected between the screw 22a and the screw 22b of the conveying screw 22 inverts the sludge conveyed in the conveying conveyor 20 to prevent the sludge from agglomerating and thus improves drying performance. In order to be connected to the whole of the screw wound on the screw shaft 21, it is preferably connected at regular intervals, it is installed to be connected every 90 ° rotation radius.

And the cold and hot water distribution path 25 which has predetermined space | interval space is piped in the outer periphery of the transfer conveyor 20. As shown in FIG. That is, the conveying screw 22 is inserted into the inner tube of the conveying conveyor 20, and the distribution passage 25 through which cold and hot water is transmitted is formed in the outer tube surrounding the inner tube.

The cold and hot water flow passage 25 is provided with a water inlet 24 to which cold water or hot water is supplied from the outside, and a drain hole 26 through which the cold or hot water passed through the cold and hot water flow passage 25 is discharged. The drain 26 is piped to a separate cold water or hot water supply device (not shown). Therefore, cold water or hot water is supplied along the cold / hot water distribution path piped to the outer circumference of the conveyer 20 to cool or heat the sludge in the conveyer 20 to improve drying of the sludge.

The transfer conveyor 20 is connected to a plurality, each transfer conveyor 20 is connected to the connecting passage (30). The connection passage 30 is the end of the transfer conveyor 20, for example, the sludge is introduced from the hopper 10 or the transfer conveyor 20 of the upper end, the sludge transferred by the rotation of the transfer screw 22 is the next lower It is connected to be discharged and input to the transfer conveyor (20). In other words, the exit of the upper transfer conveyor 20 is the inlet of the next lower. When the transport conveyor 20 is connected to the connection passage 30 in this way, the drying section of the sludge becomes longer, so that more rational drying can be achieved.

In addition, the connection passage 30 is also connected to the adjacent conveying conveyor 20 is also a passage through which the cold or hot air flowed from the outside while discharging and injecting the sludge.

And the crusher 40, 42 is optionally inserted into the connecting passage 30 to be crushed in a powder state so as not to aggregate the sludge to be dried and transported. Since the crushers 40 and 42 may be selectively applied to determine the degree of crushing according to the particle size of the sludge, the crusher 40 and 42 may be selectively applied to the corresponding connection passage 30, and the crushing may be performed while the sludge is dried. It will be possible to determine the installation location of the shredders 40, 42 to be made.

On the other hand, the motor 70 is used to rotate the transfer screw 22 in each transfer conveyor 20, the motor 70 is preferably located in the center in which a plurality of transfer conveyor 20 is installed. In FIG. 3, the driving sprocket 72 is connected to the rotating shaft of the motor 70, and the transfer screw 22 of each transfer conveyor 20 is rotated by the motor 70. A driven sprocket 74 is connected to the screw shaft 21 of the. And the drive sprocket 72 and the driven sprocket 74 are connected by the chain 76, respectively. Therefore, the rotational force of the motor 70 is transmitted to the drive sprocket 72 mounted on the rotating shaft, and the drive sprocket 72 is connected to the driven sprocket 74 through the chain 76 so as to rotate the driven sprocket 74. The screw shaft 21 of the transfer screw 22 of each transfer conveyor 20 is rotated. At this time, the rotation direction is made to rotate in the same direction as the rotation direction of the motor 70, the conveying screw 22 of each adjacent conveying conveyor 20, respectively, to convey the sludge in the opposite direction. That is, the conveying screw 22 is wound clockwise and counterclockwise on the screw shaft 21 so that the conveying direction of the sludge becomes the opposite direction even if the conveying screw 22 rotates in the same direction. Furthermore, in consideration of the capacity of the motor 70 or the drying capacity of the sludge, the size and number of the transfer conveyors 20 connected to the chain may be determined. The side surface of each chain 76 is provided with a chain support 77 for supporting the elasticity of the chain 76.

And the hot and cold air supply port 70 is provided on the side of the conveying conveyor (20). Cold and hot air supply port 70 is for allowing the lower end of the plurality of conveying conveyor 20 is installed, that is, the cold or hot air flows from the lower conveying conveyor 20 connected to the connection passage 30, respectively. The cold and hot air supply port 70 is preferably mounted on the transport conveyor 20 installed at the lower end, but can be mounted on the side of the corresponding transport conveyor 20 installed below as needed. Cold and hot air supply port 70 is connected to a cold and hot air supply (not shown) for generating and supplying cold or hot air. Cold air or hot air supplied from the cold and hot air supply port 70 is for effectively drying the sludge during the transport of the sludge. When cold air or warm air flows into the conveying conveyor 20, it is supplied between the conveying screw 22 and the support 23, and is supplied to the upper conveying conveyor 20 through the connecting passage 30.

Cold or warm air supplied to the transfer conveyor 20 is discharged to the outside through the forced exhaust device 60, the forced exhaust device 60 is installed through the exhaust pipe 61 at the top of the transfer conveyor (20) Preferably, but the exhaust pipe 62 is also connected to the transfer conveyor 20 of the central portion installed in a plurality so as to maintain a positive pressure in the transfer conveyor 20.

The forced exhaust device 60 is provided with a plurality of exhaust fans built-in to suck the air in the transfer conveyor 20 to force discharge. The exhaust pipes 61 and 62 connected to the forced exhaust device 60 are connected to the sides of the corresponding one or more transfer conveyors 20.

Fixing members 80 and 81 are installed to support and connect the transport conveyors 20 installed up and down.

As a component of the present invention, the same reference numerals apply to the same parts in the structure and configuration of the transfer conveyor 20.

The operation of the cold and hot sludge drying apparatus of the present invention having such a configuration is carried out by first feeding food waste, industrial waste or sewage treated sludge and the like with water content of about 80 to 85% through the hopper 10. Sludge is introduced into the conveyor 20, and the introduced sludge is conveyed along the rotational direction of the conveying screw 22. And the sludge is turned upside down by the ribbon screw 27 connected between the transfer screw 22 to prevent agglomeration of the sludge.

While the sludge is transferred through the transfer conveyor 20, the drying conditions are improved by cold water or hot water flowing along the cold / hot water flow path 25 installed at the outer periphery of the transfer conveyor 20, and the plurality of transfer conveyors 20 are installed. Sludge is dried more rapidly by cold or hot air supplied through the cold / hot air supply port 70 connected to the bottom of the). The cold or warm air passes through the transfer screw 22 and the support 23, and then is supplied to the upper transfer conveyor 20 through the connection passage 30 connected between the transfer conveyor 20.

In addition, the sludge conveyed through the upper conveying conveyor 20 is discharged to the lower conveying conveyor 20 through the connection passage 30 to continue drying.

In addition, the cold or warm air supplied through the transfer conveyor 20 is discharged to the forced exhaust device 60 through the exhaust pipe 61 connected to the transfer conveyor 20 at the uppermost level, and the exhaust pipe is also provided to the transfer conveyor 20 installed at the center. The 62 is connected so that cold or warm air is discharged.

On the other hand, the cold water or hot water passing through the cold and hot water distribution path 25 of the outer periphery of the conveying conveyor 20 is drained through the drain hole 26, after the heat exchange is performed in the device for supplying cold water or hot water, the water drain port 24 again It is sent through.

And the crusher 40, 42 is installed in the connecting passage 30 connected between the transfer conveyor 20 to crush the sludge agglomerated mass or particles of the dried sludge. Furthermore, the shredder 42 breaks the sludge which is mostly dried into powder form. The sludge powder discharged through the connection passage 30 of the lowermost transport conveyor 20 can be contained in a separate container. Sludge is used for incineration, landfill, fertilizer or feed depending on conditions.

Cold and sludge drying apparatus of the present invention according to the above-described embodiments by connecting and fixing a plurality of transfer conveyors in multiple stages to supply cold water or cold air or hot water or hot air, respectively, to improve the drying efficiency of the sludge, transfer screw and ribbon screw By preventing agglomeration and solidification of the furnace sludge, and by crushing the particles of the sludge by using a crusher, it has the effect of improving the various high-quality sludge drying performance, not limited to only the above-described embodiment, May be easily changed or substituted.

Claims (5)

In the sludge drying apparatus for drying the sludge injected from the hopper, A plurality of transfer conveyors for drying the sludge introduced from the hopper while transferring the sludge in the rotation of the transfer screw; One end of the adjacent transfer conveyor is connected to discharge the sludge, the cold passage or hot air circulation passage; A motor for rotating the conveying screw of each conveying conveyor; A crusher selectively inserted into the connection passage to crush sludge; A cold / hot wind supply port provided at a side of the conveyer to supply cold or warm air into the conveyer; Cold sludge drying apparatus comprising a forced exhaust device for forcibly exhausting the cold or hot air applied to the conveying conveyor. The method of claim 1, wherein the transfer conveyor A screw rotating shaft rotated in a predetermined direction by a rotating force supplied from the motor, A screw support for supporting a transfer screw to be wound around the screw rotation shaft at a predetermined interval; A ribbon screw connected between the screw and the screw of the transfer screw; A water supply port to which cold water or hot water is supplied from the outside of the transfer conveyor; A cold / hot water distribution passage provided with a predetermined space at an outer circumference of the conveying conveyor, in which cold water or hot water supplied from a water outlet is distributed; Cold sludge drying apparatus, characterized in that it comprises a drain for discharging the cold water or hot water passing through the distribution passage. The method of claim 1, wherein the conveying conveyor is a cold and cold type, characterized in that the conveying screw of the adjacent conveying conveyor is rotated in the same direction, the conveying screw is wound in opposite directions so as to convey the sludge in the opposite direction, respectively Sludge drying equipment. The method of claim 1, wherein the rotational force of the motor is connected to the chain through the drive sprocket and the driven sprocket connected to the rotary shaft of the adjacent conveying conveyor, the driven sprocket is characterized in that each chain connected to the driven sprocket of the adjacent conveying conveyor Hot and cold sludge drying apparatus. The cold and sludge drying apparatus according to claim 1, wherein the exhaust pipe of the forced exhaust device is connected to the top and center transfer conveyors so that the pressure in each transfer conveyor remains the same.