KR20010096452A - Dry apparatus - Google Patents

Abstract

PURPOSE: A drying device is provided to supply a device for sludge treatment at a low price and to cut down the cost required for sludge treatment by drying sludge injected into a drum, completely by the flame of a burner. CONSTITUTION: A third drying drum(6) supported by plural support rollers(2) is rotated integrally with a first and a second drying drum(4,5) when a driving motor(3) is operated. A main burner(14) is operated, and heat of a flame from the main burner heats the inside of each drying drum to dry sludge. If the temperature of the third drying drum is low, an auxiliary burner(14') is operated to heat the third drying drum. Then, sludge is injected into a hopper(16) and carried into the first drying drum by a transfer screw(15). The transferred sludge is carried toward a discharge space(10) by guidance of transfer blades(4a) inside the first drying drum. In a process of transferring the sludge, moisture of the sludge is evaporated and the viscosity of the sludge is raised. Thereby, the sludge is attached to the inside of the first drying drum. The sludge is separated from the inside of the first drying drum by air pressure injected from a nozzle of an air spraying pipe(21). The primarily dried sludge is dropped into the second drying drum to be dried again in a process of flowing toward a discharge area(11) by transfer blades(5a). After that, the sludge is injected into the third drum and dried completely. The completely dried sludge is collected in a sludge collector(12) through a discharge port(6c) and discharged through a discharge guide case(12b) by a discharge screw(12a). Therefore, the sludge is dried regularly through the first to the third drying drum.

Description

Drying apparatus

The present invention relates to a drying apparatus for drying sludge generated in a water purification plant or a sewage treatment plant.

In the water treatment process in a water treatment plant or sewage treatment plant, a process for precipitating and filtration of solids such as various heavy metals and soils mixed with water is essential.In the case of precipitating and filtration of water, a large amount of sludge ( Sludge occurs.

As a conventional method of treating sludge generated in the process of treating water as described above, it is generally carried out by placing the sludge in a predetermined space, drying it appropriately by solar heat, and then burying it.

However, when the sludge is treated as described above, the sludge has to be deposited for a long time, and during this period, the sludge is lost by rain water or the like, thereby contaminating the surrounding environment by odor during drying.

As a solution to the problems caused by naturally drying the sludge has been proposed to forcibly dry the sludge by the flame of the burner and to use the dried sludge as an auxiliary material for paving the road.

However, the conventional dryer provided to forcibly dry the sludge as described above is not only complicated in construction, but also has to be provided with several dryers for drying the sludge. Therefore, a considerable cost is required for the provision and maintenance of equipment for drying the sludge. It will take.

The present invention has been invented in view of the above-mentioned various conventional problems, and its object is to inject sludge into a drum having a predetermined space, and at the same time the sludge injected into the drum is completely transferred by the flame of the burner. It is intended to provide a drying apparatus that can supply the apparatus for the treatment of sludge at low cost, as well as reduce the maintenance cost and greatly reduce the cost of the treatment of the sludge.

1 is a cross-sectional view of the drying apparatus according to the present invention

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

Figure 3 is a cross-sectional view of the operating state of the drying apparatus according to the present invention

4 is an enlarged cross-sectional view taken along the line B-B of FIG.

<Code Description of Main Parts of Drawing>

1. Support

2. Support roller

3. Drive motor

4. The first drying drum

5. Second Dry Drum

6. 3rd Drying Drum

7. Support plate

8. Spacer

9, 9 '. shroud

10, 11.Exhaust space

12. Sludge Collection Body

13. Gas collection body

14. Main Burner

14 '. Auxiliary Burner

15. Transfer Screw

In the drying apparatus provided in the present invention, the first drying drum is provided on the inner circumferential surface of the transfer blade and the dispersing blade continuously, and the first and second drying drums are continuously provided on the inner circumference of the first drying drum. A second drying drum fixed to maintain a predetermined distance from the drum, and a third transfer drum and a dispersing wing provided on the inner circumferential surface in succession so as to be fixed to maintain a predetermined distance from the second drying drum outside the second drying drum. A drying drum, a transfer screw provided at one end of the first drying drum in the axial direction, and a first drying drum and the third drying drum near the other ends of the first and third drying drums in the axial direction, respectively. And a main burner and an auxiliary burner installed, a support plate fixed to an outer circumferential surface of the second drying drum, a plurality of support rollers supporting the support plate at a lower portion thereof, and a driving motor for rotating the support rollers. It characterized.

As described above, the first drying drum and the third drying drum are rotated by the driving motor, and the sludge introduced into the first drying drum by the transfer screw is transferred in the axial direction of the first drying drum. The sludge, which is first dried by the flame and then moved to the second drying drum and moved to the second drying drum, is transferred to the third drying drum after being dried secondly while being transferred in the axial direction of the second drying drum, and the third drying drum. The sludge moved to is completely dried by the flame of the auxiliary burner while being transferred in the axial direction of the third drying drum.

Hereinafter, a specific embodiment of the present invention will be described in detail with reference to the drawings.

1 is a sectional view of a drying apparatus according to the present invention, and FIG. 2 is a sectional view taken along the line A-A in FIG.

Reference numeral 1 denotes a support, and a pair of support rollers 2, 2, 2, 2 are rotatably provided at an upper portion of the support 1 at regular intervals. The pair of support rollers 2 and 2 on one side are rotatable by the drive motor 3.

Reference numeral 4 is a first drying drum in which a feed blade 4a and a dispersal blade 4b are fixed to an inner circumferential surface, and a plurality of locking plates 4c are provided on the outer circumferential surface thereof in the axial direction.

On the outer circumference of the first drying drum 4, the second drying drum 5 and the third drying drum 6 are arranged in this order. A pair of support plates 7 and 7 are fixed to the outer circumference of the third drying drum 6 at regular intervals in the axial direction of the third drying drum 6.

The second drying drum 5 and the third drying drum 6 are also provided with transfer blades 5a and 6a and dispersion blades 5b and 6b on the inner circumferential surface thereof.

The first drying drum 4, the second drying drum 5, and the third drying drum 6 are fixed by the spacer 8 to have the same central axis and to be kept at a predetermined interval, and the third drying drum. Both axial end portions of (6) are closed by side plates 9 and 9 '. Here, a plurality of gas discharge holes 9a are formed in one side plate 9 '.

In the fixed state of the side plates 9 and 9 'as described above, between one side plate 9 and one axial end of the first drying drum 4 and between the other side plate 9' and the second drying drum 5. The discharge spaces (10, 11) are formed respectively.

In addition, the transfer blade 4a formed on the inner circumferential surface of the first drying drum 4 is capable of transferring the sludge introduced into the first drying drum 4 to the discharge space 10 by the rotation operation of the first drying drum 4. The conveying blade 5a having a shape and an angle and formed on the inner circumferential surface of the second drying drum 5 can transfer the sludge dropped from the discharge space 10 to the discharge space 11 by rotating the second drying drum 5. The transfer blades 6a formed on the inner circumferential surface of the third drying drum 6 may have sludges dropped from the discharge space 11 by the rotational operation of the third drying drum 6 and the discharge space 11. It has the shape and angle which can be conveyed toward the discharge port 6c formed in the 3rd drying drum 6 on the opposite side. That is, each of the transfer blades 4a, 5a, and 6a has a spiral formed to be slanted in the direction to transfer the sludge.

In addition, the dispersing blades 4b, 5b, and 6b formed on the inner circumferential surface of each of the drying drums 4, 5, and 6 are guided by the transfer blades 4a, 5a, and 6a, and the sludge to be conveyed is raised upward, and then dropped by gravity. The locking plate 4c fixed to the outer circumferential surface of the first drying drum 4 is raised and dropped by the dispersion blades 5b provided in the second drying drum 5. The sludge is kept on the outer surface of the first drying drum 4 so as to increase the drying effect of the sludge.

In the present invention as described above, the support plates (7, 7) fixed to the outer periphery of the third drying drum (6) is mounted on the support rollers (2, 2, 2, 2) installed on the support (1) drive motor (3) ), The support plates 7 and 7 are rotated together with the respective drying drums 4, 5 and 6 on the support rollers 2.

A cap-shaped sludge collector 12 and a gas collector 13 are disposed outside the side plates 9 and 9 ', respectively, and a feed screw 12a is installed inside the sludge collector 12. The lower part of the sludge collection cylinder 12 is in communication with the discharge guide cylinder 12b. The outlet 6c of the third drying drum 6 is accommodated in the sludge collection tank 12.

The main burner 14 is installed at the center of the sludge collection tank 12 toward the inner side of the first drying drum 4, and at the lower part of the sludge collection tank 12 toward the inner side of the third drying drum 6. The auxiliary burner 14 'is provided.

In addition, a transfer screw 15 is installed in the center of the side plate 9 'from the outside of the side plate 9' to the inside of the first drying drum 4, and the transfer screw 15 is operated by a motor 15a. The hopper 16 is provided above the distal end of the transfer screw 15 located outside the side plate 9 '.

Reference numerals 9b and 9c are openings formed in the side plate 9 so that the flames of the main burner 14 and the auxiliary burner 14 'can be injected into the first drying drum 4 and the third drying drum 6, respectively. The reference numeral 17 denotes an exhaust blower fan installed to communicate with the inside of the gas collecting cylinder 13, and the reference numeral 18 denotes an insulator installed on the outer circumferential surface of the third drying drum 6.

The present invention includes sludge separation means (20) for preventing sludge from adhering to the inner surface of the first drying drum (4) at the initial stage when the sludge is introduced into the first drying drum (4). That is, as shown in Figure 1 on the inner surface of the first drying drum (4) adjacent to the transfer screw 15, the air injection pipe 21 having a nozzle at a predetermined interval in the longitudinal direction and one end of the longitudinal direction is closed ) Is fixed at predetermined intervals. In addition, the other end in the longitudinal direction of the air injection pipe 21 is connected to the air chamber 22 disposed in the longitudinal center portion of the first drying drum 4, and the air supply pipe 23 is formed at the axial center of the air chamber 22. The one end in the longitudinal direction of the slidably coupled and the other end in the longitudinal direction of the air supply pipe 23 is connected to the discharge portion of the blowing fan 24 provided on the outside of the gas collecting body (13).

Air supply to the air chamber 22 through the air supply pipe 23 even if the first drying drum 4 is rotated by the configuration in which the air supply pipe 23 is slidably coupled to the air chamber 22 as described above. It proceeds smoothly without any problem, and the sledge is separated from the inner surface of the first drying drum 4 by the high pressure air pressure injected from the nozzle through the air chamber 22 and the air injection pipe 21.

The action of drying the sludge by the drying apparatus of the present invention as described above is as follows.

When the driving motor 3 is operated, the third drying drum 6 supported by the supporting rollers 2, 2, 2, 2 rotates together with the first drying drum 4 and the second drying drum 5. do. When the main burner 14 is operated, the heat of the flame ejected from the main burner 14 warms the inside of each of the drying drums 4, 5 and 6 in a state suitable for drying the sludge. In this case, when the temperature in the third drying drum 6 is low, the auxiliary burner 14 'is operated to further warm the inside of the third drying drum 6.

When the sludge is introduced into the hopper 16 in the above state, the sludge introduced into the hopper 16 is supplied into the first drying drum 4 by the transfer screw 15.

When the sludge is supplied to the first drying drum 4, the sludge is transferred to the discharge space 10 by the guide of the transfer blade 4a provided on the inner circumferential surface of the first drying drum 4. In the process of transporting the sludge, the sludge is added to the first drying drum 4, and as the moisture contained in the sludge evaporates, the viscosity of the sludge increases so that the sludge adheres to the inner surface of the first drying drum 4. However, the sludge attached to the inner surface of the first drying drum 4 is separated from the inner surface of the first drying drum 4 by the air pressure injected from the nozzle of the air injection pipe 21, so the sludge is smoothly transferred. Proceed.

As described above, the sludge which is primarily dried while passing through the first drying drum 4 is transferred to the discharge space 10 and dropped to the second drying drum 5, and the sludge dropped and dropped into the second drying drum 5. It is dried again while being transferred to the discharge space 11 by the transfer blade 5a provided on the inner circumferential surface. And the sludge falling to the third drying drum 6 through the outlet 11 is completely dried while being transported toward the outlet 6c by the guide of the transfer blade (6a) provided on the inner peripheral surface of the third drying drum (6).

And the completely dried sludge collected into the sludge collection cylinder 12 through the discharge opening 6c of the third drying drum 6 is discharged to the outside through the discharge guide cylinder 12b by the discharge operation of the discharge screw 12a. do.

In the drying process of the sludge as described above, the drying is carried out in a state in which the sludge is evenly distributed in each of the drying drums 4, 5, and 6, and thus rapid and uniform drying is performed. And the sludge which is dried in each drying drum 4, 5, 6 is moved upward by the dispersing blades 4b, 5b, 6b provided in the inner surface of each drying drum 4, 5, 6, and falls. Because it is dispersed, there is no fear that the sludge agglomerated into a lump state. In addition, the gas generated in the drying process is discharged to the atmosphere by the blowing fan 17 through the gas discharge hole 9a and the gas collecting body 13 of the side plate 9 '.

Furthermore, the sludge that rises after falling by the dispersing blades 5b while passing through the second drying drum 5 is caught by the catching plate 4c fixed to the outer surface of the first drying drum 4 so that the first drying drum ( Since it dries by the high temperature heat transmitted from the 1st drying drum 4, while staying on the outer surface of 4), it exhibits the outstanding drying effect by this.

Since the sludge obtained by the present invention as described above is almost completely dried, it can be usefully used as an auxiliary material for road paving materials.

The present invention allows the sludge to be dried by heat of the flame by the burner while sequentially transporting the sludge in the rotating first, second and third drying drums, in particular in the first drying drum. The air pressure prevents adhesion to the inner surface of the first drying drum.

Therefore, in the present invention, the drying is performed smoothly while the sludge is evenly distributed in the interior of the first, second and third drying drums, so that the complete drying is quick and uniform.

In addition, since the sludge is dried in one apparatus, the structure of the sludge treatment apparatus can be simplified and supplied at a low cost, and the maintenance cost and the cost of the sludge treatment can be greatly reduced.

Claims (3)

The first drying drum 4 is provided on the inner circumferential surface of the transfer blade 4a and the dispersing blade 4b continuously, and the first drying drum is provided on the inner circumferential surface of the first drying drum 5a and the dispersing blade 5b. A second drying drum 5 fixed to maintain a predetermined distance from the first drying drum 4 on the outer side of (4), and a transfer blade 6a and a dispersion blade 6b are continuously provided on the inner circumferential surface A third drying drum 6 fixed to maintain a predetermined distance from the second drying drum 5 on the outside of the two drying drums 5, and one end portion of the first drying drum 4 in the axial direction A main screw installed toward the first drying drum 4 and the third drying drum 6 near the distal end portions of the transfer screw 15 and the first drying drum 4 and the third drying drum 6 in the axial direction, respectively. Burner 14 and auxiliary burner 14 ', support plates 7 and 7 fixed to the outer circumferential surface of the third drying drum 6, and a plurality of support rollers supporting the support plates 7 and 7 from below. (2,2,2,2) and support rollers (2,2) It is a drive motor (3) for transferring, the 1.2 dry drum and the third dry drum is rotated by the drive motor, and the sludge introduced into the first dry drum by the transfer screw is transferred in the axial direction of the first dry drum. As the first drying by the flame of the main burner is moved to the second drying drum, the sludge moved to the second drying drum is transported in the axial direction of the second drying drum and then dried to the third drying drum. The sludge moved to the third drying drum is completely dried by the flame of the auxiliary burner while being transferred in the axial direction of the third drying drum. The air spray pipe (21) according to claim 1, wherein the air spray pipe (21) is fixed to the inner surface of the first drying drum (4) adjacent to the conveying screw (15), and the air spray pipe (21) is first dried. It is connected to the air chamber 22 disposed in the drum 4, the one end of the longitudinal direction of the air supply pipe 23 is slidably coupled to the axis center of the air chamber 22, and the longitudinal direction of the air supply pipe 23 The other end is connected to the outlet of the blower fan 24, and the first drying drum is formed by the high pressure air pressure sprayed from the nozzle through the air supply pipe 23, the air chamber 22, and the air injection pipe 21. Drying apparatus characterized in that the sledge is separated from the inner surface of 4). The sludge as set forth in claim 1, wherein the sludge that rises and falls by the dispersing blades 5b provided in the second drying drum 5 is fixed to the outer peripheral surface of the first drying drum 4. Drying apparatus characterized in that it is caught by (4c) and dried on the outer surface of the first drying drum (4).