KR100314378B1 - Recyling process unit of purification plant sludge - Google Patents

Abstract

PURPOSE: An apparatus for recycling sludge of a purification plant is provided to prevent environmental pollution by processing waste sludge having moisture content of 70 to 80% produced in a large amount at the purification plant. CONSTITUTION: In recycling the sludge produced at a purification plant comprising the processes of sludge collection, dehydration, multistage extrusion, rotary drying and rotary calcining, the apparatus for recycling sludge of the purification plant is characterized in that: a dehydrator(3) used in the repeated dehydration process is divided into a dehydration part(4) and a compression part(5); a piston(4"') connected to a rod(4") of a cylinder(4') is inserted into a porous part(3') at the upper part of which a hopper is formed in the dehydration part(4) so that sludge admitted into the porous part(3') is repeatedly dehydrated as the piston(4"') is being repeatedly reciprocated; and the dehydrated sludge is extruded in a pellet shape through extruding paths(5"',6",7",8") formed on the circumference of the extruding pipes(6,7,8) by consecutively operating multiple extruding pipes(6,7,8) installed in front of the porous part(3') as the rod (4") of the piston (4"') and an extrusion piston rod (5") are being operated at the same time after an open-and-shut door of the hopper is closed when the repeatedly dehydrated sludge is accumulated in a certain amount.

Description

Recycling equipment for water purification plant sludge {RECYLING PROCESS UNIT OF PURIFICATION PLANT SLUDGE}

The present invention relates to an apparatus for recycling sludge produced in large quantities in a water treatment plant.

Increasing Urban Population Due to the development of industrial society, the demand for industrial water is increasing day by day, and the production of tap water is increasing rapidly. Accordingly, the amount of sludge produced in the water purification plant is also relatively increasing.

Such sludge is a colloidal phenomenon with a very high water content (70-80%), which not only causes environmental pollution due to leachate leakage from the treatment process and odor from the decay process. As a result of relying on purchase, relying on dumping at sea, or relying on dumping at sea, there is a problem of paper shortage in the case of purchase processing, and a problem of water gloss in the case of marine dumping.

In order to solve such a problem, in recent years, a rotary drying furnace is mainly used as a mechanical dehydration and drying method by belt press or original strength, but this is caused by condensation of processed materials due to excessive consumption of energy and centrifugal force generated during rotation of the drying furnace. Because of the agglomeration, there was a drawback that could not be used as a soil improver or additive to aggregates or building materials.

The present invention has been invented to solve the above problems, the present invention is to put the sludge collected in the water purification plant in the primary hopper and the solids or sediments contained in the process sludge is added to the secondary hopper through the conveying conveyor The sludge dropped into the secondary hopper in the form of pure sludge, and the sludge dropped from the secondary hopper is compressed by the piston connected to the hydraulic cylinder rod which is repeated backward and backward within the perforated part of the dehydrating extruder. When the sludge reaches a certain amount, the sludge is extruded into a pellet shape by multiple extrusion tubes connected to the extrusion cylinder rod and dropped on the secondary conveying conveyor, and the pellet conveyed by the secondary conveyor is inclined backwardly on the upper part of the drying prescribed machine. Ascending from the rotary kiln located below it In the process of being transported into the forward inclined rotary kiln in the dry state by high heat, it is fired by the high temperature of 700 ℃ or higher which is injected from the burner, and becomes pellets with little moisture content and flows into the recycled product packaging through the third conveying conveyor. It was made.

1 is a process display of the present invention

2 is a schematic view of the apparatus of the present invention.

3 is an exploded perspective view of portion 'A' of FIG.

4 is a diagram showing the operation of FIG.

5 is a cross-sectional view of FIG.

6 is a cross-sectional view of FIG.

7 is an exploded perspective view of part 'B' of FIG.

8 is a cross-sectional view of FIG.

* Explanation of symbols for important parts of the drawings

Process for sorting gas-sludge b Dewatering process Multi-extrusion process

La-Drying Process Ma-Firing Process Bar-Recycling Product Packaging Process

1,1'-hopper 2,2 ', 2'-conveyor conveyor 3-dehydrator

3'- Perforated 3'- Dewatered 3 ''-Air Outlet

4-dehydration 4'-cylinder 4'-rod

4 ''-piston 5-extrusion 5a-hydraulic cylinder

5'-Piston Rod 5'5 ''-Jump 6,7,8-Extrusion Tube 6 ', 7', 8 ', 6', 7 ', 8'-Jump 5' ', 6' ', 7 '', 8 ''-extrusion furnace

9-drying kiln 10-rotating drying furnace 10'-rotating kiln

10'-Curved 11-Firewall 12-Burner

13-Communication 14-Sprocket 15-Motor

15'-support

This will be described in detail based on the drawings.

First, the fixing thereof is described based on FIG. 1. Sludge sorting process (a), repeated dehydration process (b), multistage extrusion process (c), rotary drying process (d), rotary firing process (e), recycling product packaging process (F), in the apparatus thereof, as shown in FIGS. 2 to 6, a primary conveying conveyor 2 is provided at the lower outlet of the primary input hopper 1, and at its rear end, The vehicle inlet hopper 1 'is provided, a dehydrator 3 is provided at the lower outlet thereof, a dehydrator 4 is formed at one side of the dehydrator 3, and an extruded part 5 is installed at the other side. In the porous part 3 ', a piston 4' 'connected to the rod 4' of the hydraulic cylinder 4 'is fitted, and the sludge introduced into the porous part 3' is pressed while repeating backward and forward. At this time, the leachate is allowed to flow out through the dehydration hole (3 '), and the three extruded portion (5) gradually different in diameter and length Extruded pipes 6, 7 and 8 are sandwiched in multiple, but the inner peripheral surfaces of these extruded pipes 6, 7 and 8 are extruded by 6 '', 7 '' and 8 ''. Is formed, and engaging jaws 6 ', 7', 8 ', 6', 7 ', 8' are formed at the front and rear ends of the outer circumferential surface so as to be caught in multiple stages, and the inner extrusion pipe 6 The piston rod 5 'of the hydraulic cylinder 5a is fitted therein, but the rear end jaw 5' of the rod 5 'is caught by the outer end jaw 6' of the inner extrusion pipe 6, , The inner end locking jaw 6 'of the inner extrusion pipe 6 is caught by the locking jaw 5' 'of the rod 5' formed at a predetermined interval at a predetermined interval, and the outer end of the extruded portion 5 The installed secondary conveying conveyor 2 'is connected to the dry calciner 9, as shown in FIGS. 7 and 8, and the rotary drying furnace 10, which is inclined backward, is provided on the upper portion of the dry calciner 9. In the lower portion thereof, a forward-facing rotary kiln 10 'is provided and communicated with the curved portion 10', but this rotary drying furnace 10 ) And a fireproof wall body 11 are attached to the inner circumferential wall of the rotary firing furnace 10 ', a communication 13 is provided in the opening of the rotary drying furnace 10, and a burner (in the opening of the rotary firing furnace 10'). 12), a tertiary conveying conveyor 2 'is installed at the lower end of the opening of the rotary firing furnace 10', and the sprockets are formed on the outer circumferential surfaces of the rotary drying furnace 10 and the rotary firing furnace 10 '. 14 is formed so that the rotary drying furnace 10 and the rotary firing furnace 10 'are decelerated and rotated by the motor 15 installed on the support 15'.

The apparatus of the present invention configured as described above is a treatment apparatus which collects sludge generated in a large amount in a water treatment plant and enables recycling to soil additives or additives of construction aggregates.

The sludge collected at the water purification plant is a colloidal shape with its water content of 70 to 80%, and it contains some solids or contaminants. The first step of the treatment apparatus of the present invention is a sludge sorting process, in which the osteoid sludge collected in the water purification plant is introduced into the first hopper (1). The sludge flowing out to the bottom of (1) is collected by the primary conveying conveyor (2) to collect the solids or contaminants contained in the sludge to be introduced into the secondary hopper (1 ') in the pure sludge state.

The secondary process is a repetitive dehydration process, and the sludge introduced into the secondary hopper 1 'is dropped into the lower portion of the hopper 1' and introduced into the dehydration part 4 formed in the dehydrator 3, and when the input is completed, the hopper As the opening and closing plate of 1 'is locked, the piston 4' 'connected to the rod 4' of the inlet cylinder 4 'advances and compresses the sludge. At this time, the extruded pipe (6) (7) (8) installed in the extruded part 5 is locked as the jaws (5 ') 6' (7 ') 8' contact with each other as shown in FIG. Since it is in the state, the leachate generated during the compression is discharged out through the dehydration hole (3 '), and the excessive pressure generated at this time is exhausted through the air outlet (3' '). As such, when the primary pressing is completed, the piston 4 '' is retracted to the original position, and the sludge in the hopper 1 'is introduced into the porous part 3' and filled in the vacancy. The opening and closing plate is closed and the piston 4 '' is pressed again to depress the sludge. When such dewatering operation is continued and the compressed and dewatered sludge is filled in the porous portion 3 ', the dewatering operation is performed because the opening door of the hopper 1' is locked and the operation of the piston 4 '' is stopped at the same time. Is complete. At this time, the water content is in the range of 40%, the volume is reduced by more than 60%.

In the multi-stage compression process, which is the third process, as the piston rod 5 'of the hydraulic cylinder 5a fitted in the extrusion part 5 is operated, the outer end engaging jaw 5' 'of the rod 5' is moved. The inner locking jaw 6 'of the inner extrusion pipe 6 is pressed, and this inner locking jaw 6' presses the inner locking jaw 7 'of the middle extrusion pipe 7, and this inner locking jaw is pressed. (7 ') is a series of pressing the inner locking jaw (8') of the outer extrusion pipe 8, the extrusion pipe (6) (7) (8) is gradually introduced into the porous section (3 ') in multiple stages. At this time, as the piston 4 ″ of the dehydrator 3 also moves inward, the dehydrated material charged in the porous portion 3 ′ is extruded 5 ′ of the extruded pipes 6, 7, 8. It is extruded into a pellet shape as shown in FIG. 6 through ') (6 ") (7 " and 8 ") and then dropped onto the secondary conveying conveyor 2'.

In the dry firing process of the 4th and 5th process, when the pellet extruded by the 2nd process by the 2nd conveying conveyor 2 'is put into the rotary drying furnace 10 of the dry baking machine 9, the rotary drying furnace ( 10) in the state that the pellets are evenly dried due to the high temperature of 700 ° C. or higher rising from the rotary kiln 10 ', the rotary kiln 10' passes through the curved portion 10 'along the inclined surface of the drying furnace 10. ) Into the fired kiln (10 ') is also inclined to the previous term so that the dried pellets are gradually moved to the front while the water is injected by the flame of the burner 12 is injected from the inlet of the kiln (10') The pellet is completely removed, and is introduced into the packing table in the state of becoming a recycling material for adding soil improving agent or construction aggregate through the third process (2 '), the sixth process.

In addition, most of the odors generated from the drying of the pellets having a moisture content of 40% in the drying furnace 10 or the firing furnace 10 'are discharged through the communication 13 or the organic matters having a high odor. Since it is erased by the high temperature of 700 ° C. or higher generated in the burner 12, it does not cause pollution to the environment.

As described above, when the sludge having a water content of 70 to 80% is treated with a pellet which is a soil improving agent or an aggregate recycling additive through a dehydration extrusion process and a dry firing process, the weight thereof is reduced to 70% range, and the volume is reduced to 80% range. It can be.

According to the apparatus of the present invention as described above, it is possible to treat the colloidal sludge in the water content range of 70 to 80% in a large amount in a water treatment plant without incurring environmental pollution. Since it can be recycled as a soil improver or aggregate additive in civil construction, the prevention of environmental pollution is a very useful invention because it can greatly contribute to the national industrial development by recycling waste resources with water.

Claims (2)

Sludge sorting process (a), repeated dehydration process (b), multi-stage extrusion process (c), rotary drying process (d), and rotary firing process (e) are used to recycle the sludge produced in the water purification plant. In the dehydrator 3 used for the process, it is divided into the dehydration part 4 and the crimping | compression part 5, and the dehydration part 4 is the cylinder 4 in the porous part 3 'with the hopper 1' at the upper part. The piston 4 '' connected to the rod 4 'of the') is fitted to allow the sludge introduced into the porous part 3 'to be repeatedly dewatered while repeating the forward and backward movements, and the dewatered sludge is repeatedly At this time, the opening and closing door of the hopper 1 'is closed and the multi-extrusion installed in front of the porous portion 3' while the rod 4 'and the extrusion piston rod 5' of the piston 4 '' are operated simultaneously. Extruded furnaces 5 '', 6 '' formed by dehydrating sludge, which is operated by chains of pipes 6, 7, 8, formed on the main surface of the extruded pipes 6, 7, 8 ( Via 7 '') (8 '') Recycling processing apparatus in a water treatment plant sludge to be extruded into a let-shape. In the rotary drying step (D) and the rotary firing step (E), the refractory wall body 11 is attached to the inner circumferential wall on the upper side of the dry firing machine 9, and the opening 13 has a communication 13 in the opening direction. Rotating drying furnace 10 is installed in the motor 15, the fire wall 11 is attached to the inner circumferential wall, the burner 12 is installed in the opening and rotated by the motor 15 A kiln (10 ') is installed, and the rotary drying furnace (10) and the rotary kiln (10'), the recycling treatment apparatus for water purification plant sludge which is communicated by the curved portion (10 ').