KR100897207B1 - Sludge drying machine - Google Patents

Abstract

The present invention relates to a drying apparatus for heating and drying the sludge generated in the waste water treatment process, a treatment tank of a predetermined size in which a sludge inlet is formed at the upper end and a sludge discharge port is formed at the lower end, and rotatably vertically penetrates at the center of the treatment tank. Sludge inlet of the treatment tank is installed, but the outer peripheral surface has a hollow shaft formed with a plurality of hot air supply holes in the up, down direction, and a plurality of impellers integrally rotated with the hollow shaft to crush the sludge injected into the treatment tank By crushing sludge falling into the impeller with the impeller, the sludge stays in the treatment tank can be increased, so that continuous crushing and dispersion can be achieved, and also to the hot air supplied through the hot air supply port. Can be dried to improve working efficiency Reduction of energy consumption due to the increase in coordination and case relates to a sludge drying device that can significantly reduce drying costs.

Sludge, treatment tank, impeller

Description

Sludge drying machine

The present invention relates to a drying apparatus for drying the sludge generated in the wastewater treatment process, rotatably installed inside the treatment tank, provided with a hollow shaft capable of supplying hot air, integrally with the hollow shaft on the outer peripheral surface of the hollow shaft By installing a rotatable impeller, the sludge that is introduced from the upper part of the treatment tank and falls down by the impeller rotation can be broken up and scattered upward, thereby increasing the time for the sludge to stay in the treatment tank, The present invention relates to a sludge drying apparatus capable of effectively dispersing sludge particles to allow continuous crushing and drying to be performed, and also to drastically reduce a drying cost due to an increase in drying efficiency as well as an improvement in work efficiency.

In general, high concentrations of organic wastewater discharged from domestic sewage or barns are treated by water purification in sewage treatment plants or sewage treatment plants in order to prevent environmental pollution.

The wastewater treatment process is performed in parallel with the biochemical treatment using microorganisms and physicochemical treatment such as precipitation, adsorption, or coagulation.

Therefore, the wastewater treatment process is generally composed of several treatment stages such as neutralization stage to neutralize acid and alkaline wastewater, microbial treatment stage to treat organic matter with microorganism, chemical treatment stage, coagulation and flocculation stage, sedimentation stage, filtration and disinfection stage. In this case, a large amount of sludge is generated which is agglomerated and precipitated during the treatment.

Sludge is a precipitate which is precipitated by a flocculant or the like, and generally contains 70% or more of water, and contains inorganic and organic substances in a ratio of about 6: 4.

These sludges are recycled by chemical analysis, etc. At this time, the pre-treatment process, dehydration process, drying process by heating and drying, molding process by molding with a granulator, and firing process are carried out.

At this time, the drying process of drying the sludge is one of the important treatment process for drying the sludge by evaporating the moisture contained in the sludge, the sludge is dried using a separate drying device.

Hereinafter, a conventional sludge drying apparatus will be described with reference to FIG. 1.

1 is a schematic configuration diagram of a conventional sludge drying apparatus,

As shown, the sludge 130 is transported in a state loaded on the conveyor (100), the stirrer 110 that can stir the sludge 130 being transported is installed on the conveyor 100 is installed .

In addition, a hot air supply unit 120 for supplying hot air to dry the sludge 130 to be transported is installed on the conveyor 100.

Therefore, the sludge 130 is continuously transported by the conveyor 100 and agitated by the rotational operation of the stirrer 110 while being heated and dried by the hot air of the hot air supply unit 120.

However, the conventional sludge drying apparatus as described above has the following problems.

First, since the sludge is transported on the conveyor and sequentially agitated by the rotational operation of the stirrer, the agglomerated sludge is not effectively crushed, and the sludge particles are scattered to the surroundings, thereby contaminating the surroundings. As it is provided separately from the stirrer to supply hot air from the upper part of the sludge, the hot air is not easily infiltrated into the sludge uniformly and effectively, so that the drying efficiency is notably reduced, and the energy consumption efficiency is reduced due to the increase of drying time. There was also a problem of increased cost.

The present invention has been made to solve the above problems, firstly, by slitting falling down from the upper part of the treatment tank by using an impeller installed in the hollow shaft in the center continuously and simultaneously lifted upwards, sludge Prolonged residence time in the treatment tank allows continuous dispersion and crushing so that the aggregated sludge is finely crushed more effectively, and secondly, hot air is sprayed directly between the impeller through the hollow shaft to be crushed and dispersed By allowing the sludge to penetrate internally, it is possible to provide uniform and effective heat drying, and to provide a sludge drying apparatus in which the drying efficiency can be significantly improved.

In order to achieve the above object, the present invention forms a space of a predetermined size so that the sludge can be dried, but the sludge inlet and the steam outlet are formed at the upper end and the sludge outlet is formed so that the sludge is discharged at the lower end, and the treatment A hollow shaft which is installed through the center portion of the jaw so as to be rotatable and rotatably provided, but the inside thereof is empty, and a hot air fan is connected to one end thereof, and a plurality of hot air supply holes are arranged to be spaced apart along the longitudinal direction on the outer circumferential surface thereof; Impellers are arranged to be spaced apart on the outer circumferential surface in the longitudinal direction of the hollow shaft to be integrally rotatable with the hollow shaft to crush the sludge introduced into the treatment tank, and a drive unit for rotating the hollow shaft It is configured by.

In addition, the hot air supply hole of the hollow shaft is formed in a plurality of spaced apart along the circumferential direction of the outer peripheral surface of the hollow shaft, the hot air supply hole and the impeller may be alternately arranged along the longitudinal direction of the hollow shaft.

In addition, the impeller is a wing that is provided with a predetermined length so that one end is coupled to the support and the outer circumference of the support and the other end is coupled to the hollow shaft, the other end is rotated adjacent to the inner circumferential surface of the treatment tank to crush the sludge Can be configured.

In addition, the wing portion of the present invention may be provided with a plurality on the support symmetrically with respect to the center of the hollow shaft can be more effectively crushed sludge.

In addition, the wing portion is composed of a chain installed to have flexibility in the circumferential direction of the hollow shaft, the chain can be axially coupled in the up and down direction to the coupling protrusion formed at regular intervals along the outer circumferential surface of the support. .

In addition, the chain may be arranged to form a counterclockwise spiral from the upper side to the lower side of the hollow shaft so as to effectively lift the sludge introduced into the treatment tank.

On the other hand, in the upper portion of the treatment tank of the present invention, a partition wall is formed so that a predetermined width of the vapor discharge chamber is formed along the inner circumferential surface of the treatment tank below the steam discharge port, and the impeller may be installed between the hollow shaft and the partition wall.

In addition, the hollow shaft is coupled to the upper rotary support of the predetermined length and the lower rotary support having a through hole formed in the center portion, the upper and lower rotary supports are respectively coupled to the bearings installed on the upper and lower ends of the treatment tank, respectively. .

At this time, the blower may be connected to the steam outlet so as to forcibly discharge the steam in the treatment tank.

In addition, the drive unit is composed of a drive motor and a belt for transmitting the rotational force of the drive motor and a pulley integrally coupled to the lower rotation support of the hollow shaft connected to the belt.

In addition, one side of the outer peripheral surface of the treatment tank may be further provided with an auxiliary burner for heating the inside of the treatment tank so that the sludge in the treatment tank can be dried more effectively.

As described above, the present invention not only has the sludge stayed in the treatment tank for a long time to be continuously crushed and dispersed, but also the hot air can effectively penetrate the inside of the sludge, so that the drying efficiency is remarkably improved. In addition, the energy consumption can be minimized, thereby reducing the production cost of the product due to the reduction of the drying cost.

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

Figure 2 shows a schematic side cross-sectional view of one embodiment of the sludge drying apparatus of the present invention, Figure 3 shows a perspective view of one embodiment of the hollow shaft and the impeller of the present invention.

As shown in FIG. 2, the present invention comprises a treatment tank 1, a hollow shaft 10, an impeller 20, and a driving unit 30.

The treatment tank 1 serves as a tank in which the sludge is dried, and is provided as a cylinder of a metal material of a predetermined height having an empty inside.

At this time, the treatment tank 1 is installed to be supported by the support frame (5).

On the other hand, one side of the upper surface of the treatment tank 1 is formed with a sludge inlet 6 through which sludge can be introduced, and a water vapor outlet 7 through which the steam inside the treatment tank 1 can be discharged. On the lower side, a sludge discharge port 8 through which dried sludge can be discharged is formed.

A sludge inlet 6 is connected to an inlet means (not shown) for continuously injecting sludge, and a blower for forcibly sucking and discharging water vapor inside the treatment tank 1 is connected to the steam outlet 7. (Not shown) is preferably connected.

As the blower, a general blower such as a centrifugal type or a rotary type that is commonly used may be used.

On the other hand, the sludge discharge port (8) may be connected to the transport means that can be transported to various treatment processes for recycling the sludge is dried and discharged into a product such as chemical analysis.

On the other hand, the hollow shaft 10 is installed in the vertical direction in the center of the treatment tank (1).

The hollow shaft 10 is a shaft of a tubular shape of a predetermined length, the inside of which is empty and both ends are open, and the upper rotary support 15 and the lower rotary support 16 are respectively coupled to the upper end and the lower end.

The upper and lower rotary supports 15 and 16 are one end portion coupled to the hollow shaft 10 so as to be integrally rotated with the hollow shaft 10, and may be coupled by welding or screwing, etc. Inserted through the upper and lower surfaces of 1) respectively.

At this time, the upper and lower rotary support (15, 16) is inserted into the bearing (18, 19) installed on the upper surface and the lower surface of the treatment tank (1) is rotatably installed.

On the other hand, the upper rotary support 15 is provided to seal the hollow shaft 10, the lower rotary support 16 is inserted to be inserted through the bearing 19, the hot air to be supplied inside the hollow shaft 10 Through-holes are formed in the central portion so as to be possible.

Therefore, a hot air fan (not shown) is connected to the through hole of the lower rotary support 16 so that hot air may be supplied into the hollow shaft 10.

Hollow shaft 10 and the upper, lower rotation support (15, 16) is not limited to the above embodiment, may be provided in a variety of structures to be rotatable in the center of the treatment tank (1), or the upper, lower rotation support 15 and 16 may be integrally formed on the hollow shaft 10.

On the other hand, as shown in the enlarged view of Figure 2, the outer peripheral surface of the hollow shaft 10, the circular hot air supply hole 12 is formed in the longitudinal direction spaced apart at regular intervals.

At this time, the hot air supply port 12 is preferably formed so that a plurality of spaced apart in the circumferential direction of the outer peripheral surface of the hollow shaft (10).

On the other hand, as shown in Figure 3, the impeller 20, which is arranged in a plurality spaced apart at regular intervals on the outer circumferential surface along the longitudinal direction of the hollow shaft 10, consisting of a support 21 and the wing portion 25 do.

The hot air supply holes 12 of the impeller 20 and the hollow shaft 10 are along the longitudinal direction of the hollow shaft 10 such that the hot air supply holes 12 are positioned between the impellers 20 adjacent to each other in the up and down directions. Alternately placed.

The support 21 is extrapolated to the hollow shaft 10 at regular intervals, and may be welded to be integrally rotatable with the hollow shaft 10.

The support 21 has a cutting groove 20b is formed so that the coupling protrusion 20a is formed at a predetermined interval on the outer circumference, and the coupling hole 22 is formed in the coupling protrusion 20a so that the wing portion 25 can be coupled thereto. , Is formed penetrating in the downward direction.

On the other hand, the wing portion 25 is rotated integrally with the hollow shaft 10 while rotating the sludge injected into the treatment tank 1 about the hollow shaft 10 and simultaneously crushed, as shown in Figure 3 A plurality of support members 21 may be provided to be symmetrical with respect to the center of the shaft 10.

At this time, the wing 25 may be configured as a chain having flexibility in only one direction.

The chain may be used a conventional roller chain (roller), one end portion in the vertical direction to the engaging projection (20a) of the support 21 by the coupling pin 26 to have flexibility in the circumferential direction of the hollow shaft (10). Axially coupled.

Therefore, the chain is installed so as to maintain flexibility in the circumferential direction of the hollow shaft 10 but not in the longitudinal direction.

However, the wing 25 is not limited to the above-described standard roller chain, a wire chain or the like in which a plurality of rings are continuously connected may be used.

Therefore, the wing portion 25 is to crush the sludge while rotating the inside of the treatment tank 1 in the horizontal direction while maintaining a straight form by the centrifugal force during the rotation of the hollow shaft (10).

On the other hand, the drive unit 30 is composed of a belt 35 and a pulley 37 for transmitting the rotational force of the drive motor 31 and the drive motor 31.

The drive motor 31 may be installed on the support frame 5, and the drive shaft 32 is coupled to the drive pulley 33 to which the belt 35 is coupled.

Meanwhile, the pulley 37 is extrapolated and coupled to the lower rotation support 16 of the hollow shaft 10 so as to rotate simultaneously with the lower rotation support 16, and the pulley 37 is connected to the belt 35.

Therefore, the rotational force of the drive motor 31 is transmitted to the hollow shaft 10 through the belt 35, the pulley 37 and the lower rotary support (16).

Meanwhile, in order to improve the drying rate of the sludge, an auxiliary burner 50 may be further provided at one side of the outer circumferential surface of the treatment tank 1 so as to provide a direct fire power into the treatment tank 1, and the auxiliary burner 50 may have a flame. It is preferable to be provided so that it may spray in the downward direction of the processing tank 1.

In addition, the sludge drying apparatus of the present invention may be connected in parallel with a plurality of sludge as necessary to allow the sludge to go through the same drying process for several times.

Meanwhile, FIGS. 4 and 5 show another embodiment of the hollow shaft 10 and the impeller 20 of the present invention, and FIG. 4 shows a perspective view of the hollow shaft 10 and the impeller 20, and FIG. 5. Shows the top view of FIG.

4 and 5 are the same as the embodiment of FIG. 3 except for the configuration of the coupling position of the wing 25, only the modified configuration will be described.

As shown, the wing portion 25 is respectively coupled to the engaging projection 20a of the support 21 so that the coupling position proceeds in the counterclockwise direction in descending downward direction from the top of the hollow shaft 10.

That is, the chain of the wing portion 25 is shifted from the support 21 coupled to the top of the hollow shaft 10 to the support 21 positioned downward, the position is changed in the counterclockwise direction, so that the hollow shaft 10 A counterclockwise spiral is formed in a downward direction with respect to the upper part.

At this time, the wing 25 is installed radially with respect to the center of the hollow shaft 10 in a plan view as shown in FIG.

Therefore, the entire wing portion 25 of the impeller 20 provided in the hollow shaft 10 is in the form of a spiral based on the center of the hollow shaft 10 when the hollow shaft 10 rotates counterclockwise as shown by an arrow. By forming the trajectory of the sludge, the sludge falling down from the upper part of the treatment tank 1 can be crushed, and at the same time, the effect of raising the sludge upwards more effectively can be obtained.

3 and 4, the wing portion 25 is not limited to being formed in plural to be symmetrical with respect to each other with respect to the hollow shaft 10, and may be provided in one or more than two, and also 4 may reduce the distance between the coupling protrusions 20a of the support 21 to form more coupling protrusions 20a, so that the wings 25 may have a more detailed spiral shape.

Hereinafter will be described the operation of the sludge drying apparatus of the present invention.

First, when the hollow shaft 10 that receives the rotational force of the driving unit 30 rotates, the impeller 20 rotates at the same time, and thus, the wing 25 of the impeller 20 moves inside the treatment tank 1. It will rotate 360 degrees.

In addition, the hot air introduced into the hollow shaft 10 by the hot air fan is supplied between the impellers 20 through the hot air supply holes 12.

At this time, when the sludge is introduced into the treatment tank 1 through the sludge inlet 6 in the upper portion of the treatment tank 1, the sludge collides with the wing portions 25 of the rotating impeller 20 and is crushed, and at the same time the treatment tank by centrifugal force. (1) It falls while rotating inside.

In addition, when the wing portion 25 of the impeller 20 is provided in a helical shape, the sludge receives centrifugal force by the rotation of the wing portion 25 and simultaneously receives a force to be lifted upward. The more time you stay, the more effectively you will be broken.

On the other hand, hot air is introduced into the impeller 20 to dry the crushed sludge.

The sludge crushed and dried as described above moves to the lower part of the treatment tank 1 and is discharged to the outside through the sludge discharge port 8.

The water vapor is discharged to the outside through the water vapor outlet 7 in the upper portion of the treatment tank (1).

On the other hand Figure 6 shows another embodiment of the sludge drying apparatus of the present invention, Figure 7 is a cross-sectional view of Figure 6, the embodiment of Figure 2 except for the configuration in which the partition wall 40 is installed on the upper treatment tank (1) Since it is the same as the example, only the changed configuration will be described.

As shown, the partition wall 40 is installed in the upper portion of the treatment tank 1 so that the steam discharge chamber 42 having a predetermined width is formed along the inner circumferential surface.

The partition wall 40 is installed above the processing tank 1 so as to form a concentric circle with the hollow shaft 10, and is a cylinder in which the upper and lower portions of the predetermined height are opened, and a support unit having one end coupled to the inner circumferential surface of the processing tank 1. It is coupled to and supported at the other end of 45.

The support 45 may be installed to support the upper and lower portions of the partition 40, and as illustrated in FIG. 7, a plurality of supports 45 may be spaced apart along the circumference of the partition 40.

Meanwhile, the wing portion 25 of the impeller 20 installed between the outer circumferential surface of the hollow shaft 10 and the inner circumferential surface of the partition 40 has a length shorter than that of the wing portion 25 installed below the treatment tank 1. By doing so, the partition 40 is rotatably installed.

Therefore, the partition wall 40 is formed by separating the upper portion of the treatment tank 1 into the sludge input chamber 9 in which the impeller 20 is rotated and the steam discharge chamber 42 through which the steam is discharged, whereby the water vapor in the treatment tank 1 It is to be able to discharge more effectively.

At this time, the sludge inlet 6 is provided in the sludge inlet chamber 9, the steam outlet 7 is provided in the upper steam outlet 42, blower (7) as shown in the embodiment of FIG. Not shown) is preferably provided.

Therefore, the sludge is first introduced into the sludge input chamber 9 above the treatment tank 1 through the sludge inlet 6, and then crushed by the wing 25 of the impeller 20 to be rotated and dried simultaneously. 1) It moves to the lower part and undergoes continuous crushing and drying process.

On the other hand, the steam is more effectively discharged to the outside of the treatment tank 1 through the steam discharge chamber 42 and the steam discharge port (7).

Therefore, the present invention receives the centrifugal force and the upward force by the impeller 20 in which the sludge falling from the upper part of the treatment tank 1 rotates, so that the staying time in the treatment tank 1 of the sludge is extended. As a result, continuous dispersing and crushing can be achieved, so that not only effective crushing is possible, but also hot air is directly injected between the crushed sludge and penetrated directly inside the sludge, thereby increasing drying efficiency and reducing energy consumption. .

As described above, the above embodiments are merely described as examples for convenience of description and are not intended to limit the scope of the claims.

1 is a schematic configuration diagram of a conventional sludge drying apparatus,

Figure 2 is a schematic side cross-sectional view of one embodiment of the sludge drying apparatus of the present invention,

Figure 3 is a perspective view of the hollow shaft and the impeller of the present invention,

4 is a perspective view of another embodiment of the hollow shaft and the impeller of the present invention,

5 is a plan view of the embodiment of FIG. 4;

Figure 6 is a side view of another embodiment of the sludge drying apparatus of the present invention,

7 is a plan sectional view of the upper portion of the treatment tank in the embodiment of FIG.

Explanation of symbols on the main parts of the drawings

1: treatment tank 5: support frame

6: sludge inlet 7: steam outlet

9: sludge feeding chamber 8: sludge discharge outlet

10: hollow shaft 12: hot air supply port

15: upper rotary support 16: lower rotary support

18,19: bearing 20: impeller

20a: engaging protrusion 20b: cutting groove

21 support body 22 bonding hole

30: drive unit 31: drive motor

32: drive shaft 33: drive pulley

35: belt 37: pulley

40: bulkhead 42: steam discharge chamber

45: support 50: auxiliary burner

100: conveyor 110: agitator

120: hot air supply unit 130: sludge

Claims (11)

A treatment tank which forms a space having a predetermined size so that the sludge can be dried, and a sludge inlet and a steam outlet are respectively formed at an upper end thereof, and a sludge discharge outlet is formed at the lower end thereof so that sludge is discharged; It is installed through the center portion of the treatment tank in the up and down direction to be rotatably provided, and the inside is empty, and one end is connected to a hot air blower, and the outer circumferential surface is formed so that a plurality of hot air supply holes are spaced apart along the longitudinal direction. Hollow shaft; An impeller in which a plurality of impellers are arranged to be spaced apart from the outer circumferential surface along the longitudinal direction of the hollow shaft to be rotatable integrally with the hollow shaft so as to fracture the sludge introduced into the treatment tank; And It is configured to include a drive unit for rotating the hollow shaft, The impeller, One end is coupled to the support that is extrapolated to the hollow shaft and the outer circumference of the support, and the other end is composed of a wing portion provided with a predetermined length to rotate the adjoining along the inner peripheral surface of the treatment tank to crush the sludge, The wing portion is composed of a chain that is installed to have flexibility in the circumferential direction of the hollow shaft, the chain is characterized in that the shaft is coupled in the up, down direction to the coupling protrusion formed at a predetermined interval along the outer peripheral surface of the support Sludge drying equipment. The method of claim 1, And a plurality of hot air supply holes of the hollow shaft are spaced apart from each other along the circumferential direction of the outer circumferential surface of the hollow shaft, and the hot air supply holes and the impeller are alternately arranged along the longitudinal direction of the hollow shaft. delete The method of claim 2, The sludge drying apparatus, characterized in that the plurality of wings are provided on the support symmetrically with respect to the center of the hollow shaft. delete The method of claim 1, The chain is sludge drying apparatus, characterized in that arranged to form a counterclockwise helix from the upper side to the lower side of the hollow shaft to effectively lift the sludge injected into the treatment tank. The method of claim 1, Sludge drying apparatus, characterized in that the partition is installed in the upper upper portion of the treatment tank so that the water vapor discharge chamber of a predetermined width is formed along the inner circumferential surface of the treatment tank, the impeller is installed between the hollow shaft and the partition wall. The method according to any one of claims 1, 2, 4, 6 and 7, The hollow shaft is coupled to the upper rotary support of the predetermined length and the lower rotary support having a through hole formed in the central portion and the upper and lower rotary supports are respectively coupled to the bearings installed on the upper and lower ends of the treatment tank, respectively. Sludge drying device characterized in that. The method of claim 8, And a blower is connected to the steam outlet so that water vapor in the treatment tank is forcibly discharged. The method of claim 9, The driving unit, Sludge drying apparatus comprising a pulley connected to the belt and integrally coupled to the lower rotation support of the hollow shaft and the belt for transmitting the rotational force of the drive motor and the drive motor. The method of claim 9, One side of the outer peripheral surface of the treatment tank is a sludge drying apparatus further comprises an auxiliary burner for heating the inside of the treatment tank so that the sludge in the treatment tank can be dried more effectively.

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