KR20130090851A

KR20130090851A - A method for reducing a sediment and a apparatus for reducing a sediment

Info

Publication number: KR20130090851A
Application number: KR1020130053021A
Authority: KR
Inventors: 정영남
Original assignee: 주식회사 덕진엔지니어링; 정영남
Priority date: 2013-05-10
Filing date: 2013-05-10
Publication date: 2013-08-14

Abstract

The present invention relates to a sediment reduction method and a sediment reduction treatment system for separating sediments containing contaminants or organic substances in stages and separating and treating them as contaminants, sand and organic materials through a dehydration process. Stores the sediment in the storage hopper; Transferring the sediment stored in the storage hopper to a rotary screen sorter to separate a mixture of contaminants, seeds and sand; Transferring the contaminants to a first screw press to remove moisture; Transferring the mixture of seeds and sand to a drum screen to separate the seeds and sand; Transferring the separated seeds to a second screw press to remove moisture; Taking out the contaminants from which moisture has been removed and the seeds from which the moisture has been removed; Transporting the sand to a sand washer and washing the sand while blowing air from the bottom of the sand washer, and the sediment reduction processing system includes a storage hopper; A rotary screen sorter for separating the sediment stored in the storage hopper into a mixture of contaminants, seeds, and sand; A first screw press for removing moisture from the contaminants; A drum screen for separating the seed and sand mixture into seeds and sand; A second screw press for removing moisture from the separated seeds; A sand washer for washing the sand separated by the drum screen and transporting the sand to the outside; And an air blower for blowing air from under the sand entering the sand washer.

Description

A method for reducing a sediment and a Apparatus for reducing a sediment}

The present invention relates to a method for reducing sediment and a treatment system for reducing sediment, more specifically, sediment containing sediments or organic substances in stages to separate and treat sediments, sand and organic substances through a dehydration process. The present invention relates to a weight reduction method and a deposit reduction processing system.

Sediments such as wastewater treatment plant, manure treatment plant and sewage treatment plant contain not only sand but also various contaminants and organic substances. In particular, dredged soils generated during the cleaning of sediments, sewer pipes, and conduits deposited in pumping stations or reservoirs contain various contaminants, sand, and sand. Dredged soil which occurs when the sediment deposited in the pump station or the reservoir, sewage pipe or conduit cleaning can also be referred to as sediment, and unless otherwise stated, the sediment is used as a concept including sediment or dredged soil.

In the related art, sediments, dredged soils, etc. were collected and stored at a predetermined place, waited until moisture was released, and then dumped or incinerated. However, marine dumping of sediments and dredged soil containing large quantities of organic matter is prohibited under international treaties. Currently, sediments and dredged soils are collected and stored in a certain place, and waited until moisture is drained out, landfilled, or incinerated and then landfilled. In the case of storing the sediment, dredged soil, etc. for a long time, organic matters decay and odors are generated, thereby providing a place where flies and mosquitoes live. Incidentally, the cost of incineration of sediment or dredged soil is determined by the treatment amount and the moisture content of water. The higher the water content of the sediment or dredged soil, the higher the energy cost.

Therefore, it is desirable to reduce and recycle the amount of sediment and dredged soil to be incinerated. In addition, reducing the water content of the sediment and dredged soil to be incinerated is one way to reduce energy costs.

Most sediments are made of incinerators, such as wood, textiles, plastic products, seeds, and fibres, and inorganic minerals that cannot be incinerated, such as sand. Therefore, if separated into coarse contaminants such as wood, textiles, plastic products, and fine contaminants such as seeds and fibres, respectively, can be incinerated through the dehydration process, and if the inorganic sand is separated separately, the soil cover of the landfill after washing Can be recycled. According to such a treatment step, by effectively treating the sediment, it is possible to reduce the amount of the sediment to be buried.

[Prior Art Literature]

(Patent Document 01) Korea Patent Registration No. 10-0892258

(Patent Document 02) Republic of Korea Patent Registration No. 10-0942564

(Patent Document 03) Korea Patent Registration No. 10-1208992

An apparatus for separating stones in a stepwise manner and separating the stains into impurities, sediments and organic substances through a dehydration process is disclosed in Korean Patent Registration No. 10-0892258 entitled " Mixed Tank Type Needle Separator ". This mixing tank-type sedimentation separator includes an import screen for sedimenting the dredged soil; Import storage hopper; Coarse scavenger eliminator; And, the mixing tank into which the dredged soil sedimented by the lifting device or the dredged soil settled in the coarse scavenger eliminator flows; A discharge pipe connected to the mixing tank; A main screw conveyor for transferring the sedimentation introduced into the mixing tank through the discharge pipe; A support bearing unit for supporting a lower end of the rotation shaft of the main screw conveyor; Air cleaning means for removing the odor of the salivary, preventing the corruption; Settling mixing means for spraying water on the settlings introduced into the mixing tank; Settling washing means for washing and removing organic contaminants contained in the settling; A sedimentation dehydrator for lowering the moisture content of the sedimentation introduced from the discharge pipe; Sedimentation dehydrator washing means for side washing the sedimentation introduced into the dehydration dehydrator; The inside of the air conveyor made of a wear-resistant material to transfer the sedimentation introduced from the sedimentation dehydrator to the storage hopper.

However, in the mixed tank type sedimentation separator, when the collected dredged soil is put into the upper part of the square grid screen by using the dredging transport vehicle, the blind screen is blocked by the impurities of the rag or wood string type. At this time, even if the dredged soil falls to the bottom while washing the dredged soil in the upper part, it is difficult to move the screw by rewinding it to the screw feeder protector. In addition, there is a disadvantage that the coarse contaminant which is separated from the coarse scum eliminator by the washing water is discharged to the outside together with moisture without dehydration function, and the disposal of the discharged contaminants causes drying and incineration. Dredged sand from which more contaminants have been removed is stored in the loading storage hopper and flows into the upper part of the sedimentation dehydrator.There is a discharge tube near the upper part, so the sand recovery rate is lowered because it exits directly to the discharge tube without being settled. Due to the sedimentation dehydrator used for the sand has a disadvantage that it is difficult to reuse.

Another apparatus for separating sediment in stages and separating and treating sediment, sediment, and organic materials through a dehydration process is disclosed in Korean Patent Registration No. 10-0942564 entitled "Sewage Dredging Treatment System." This sewage dredged water treatment device transfers dredged water from the storage tank through the dredged conveying conveyor into the drum washing machine, and the dredged and sediment of dredged material transferred into the drum washing machine is washed by the washing water sprayed inside. Separated; The separated washed contaminants are transferred to a debris dewatering screw press and dehydrated, and then the dehydrated contaminants are transferred to a contaminant storage box; The washed sediment separated from the contaminants is transferred to the washing water and the washing machine containing the organic material, and separated from the washing water containing the organic material through the precipitation process; The sedimentation separated through the sedimentation process is transferred to the sedimentation dewatering conveyor press through the sedimentation sorting screw conveyor and the dewatered sedimentation is transferred to the sedimentation storage device; Washed water containing overflowed organic material in the sedimentation plant is transferred to the wash water storage tank.

However, in the sewage dredged water treatment device, dredged water with different properties such as water or contaminants flows directly into the drum washing machine through a direct moving conveyor without control or control, so that the hard dredged water is not washed well by spray washing. It has a disadvantage. In addition, there is a disadvantage in that the dredged soil that is not separated and entangled is discharged toward the screw press, which is an outlet of the contaminant, by blocking the screen gap.

In addition, the fiber seeds, such as low-density fiber seeds containing the organic matter escaped to the washing machine is not removed and is re-introduced into the wash water storage tank is decomposed due to decay and odor is generated one by one person has a disadvantage. In addition, even if the filtrate treatment water containing the organic matter is combined with the sewage, there is a disadvantage that the decomposition time of the organic material is long, a large treatment cost occurs.

Another device and system for separating sediments in stages and separating them into contaminants, sediments and organic materials through the dehydration process is registered in the Korean patent under the name of "Sediment Washing Device and Sediment Treatment Device Including It". 1208992. In this treatment apparatus, the sediment cleaning device includes: a sediment transport casing extending inclined downward from the start end to the end; At least one sediment input unit provided in the sediment transfer casing between a start end and the end end; A sediment discharge portion provided below the end face of the sediment transfer casing and discharging the sediment at the same time as the dropping end; A main spray nozzle for spraying the washing water into the sediment conveying casing in a direction for conveying the sediment; It consists of one or more intermediate spray nozzles for spraying wash water along the sediment transfer casing towards the sediment being transferred.

However, even if the water is sprayed, such immersion cleaners cannot be recycled because the effluents in the organic state with a lot of organic matter are washed with the upper surface but the middle and the lower surface are not evenly cleaned and are discharged in the state of being rich with organic matter. It has a disadvantage. In addition, organic sewage separated during washing is re-introduced into the sewage treatment process, so that the sewage treatment process accumulates in the sewage treatment process, thereby increasing the load of the sewage treatment process.

Dredged sand from which the contaminants have been removed has a low recovery rate and has a problem in that it is difficult to reuse because the sand is broken due to the sedimentation dehydrator used to remove water from the sand.

In addition, in the case of processing dredging with different properties, such as sand or other contaminants, when dredges are introduced into the drum washing machine, the hardened dredged water is not washed well by spray washing. As organic contaminants are re-introduced into the sewage treatment process, contaminants and the like accumulate in the sewage treatment process, thereby increasing the load of the sewage treatment process.

The present invention aims to minimize the amount of contaminants to be incinerated by separating the sediment into incinerated contaminants and recyclable sand, and to maximize the amount of sand contained in the sediment.

The objects are to store the sediment in a storage hopper; Transferring the sediment stored in the storage hopper to a rotary screen sorter to separate a mixture of contaminants, seeds and sand; Transferring the contaminants to a first screw press to remove moisture; Transferring the mixture of seeds and sand to a drum screen to separate the seeds and sand; Transferring the separated seeds to a second screw press to remove moisture; Taking out the contaminants from which moisture has been removed and the seeds from which the moisture has been removed; The sand is transported to a sand washer is achieved by a method for reducing the sediment reduced by washing the sand to the outside.

In the method, the contaminants from which the moisture is removed and the seeds from which the moisture is removed are taken out to be incinerated at the cautery. In addition, it is transported to a sand washer and washed and then taken out to be used as cover material.

In the method, the storage hopper may be divided into an inflow hopper and a main hopper, and the sediment introduced into the inflow hopper may be introduced into the main hopper through a control gate.

In the method, the sand washer is composed of a drive motor for rotating the crank shaft for rocking the collection scraper unit, the transfer scraper unit and the transfer scraper unit in order to separate the fine contaminants such as seeds contained in the sand. When the transport scraper unit of the sand washing machine is shaken up, down, left and right, the lower part of the transport scraper unit is immersed in water and shaken in the water so that fine particles such as seeds contained in the sand can easily escape from the sand. In addition, the apparatus may further include a blower for removing moisture from the washed sand.

In addition, the above objects and the storage hopper; A rotary screen sorter for separating the sediment stored in the storage hopper into a mixture of contaminants, seeds, and sand; A first screw press for removing moisture from the contaminants; A drum screen for separating the seed and sand mixture into seeds and sand; A second screw press for removing moisture from the separated seeds; It is achieved by the sediment reduction treatment system comprising; a sand washer to wash the sand separated by the drum screen to be carried out to the outside.

In the apparatus, the storage hopper is composed of the inlet hopper, the main hopper and the control gate, the sediment flowing into the inlet hopper may be introduced into the main hopper through the control gate.

In the apparatus, the sand washer is composed of a conveying scraper unit swinging up, down, left and right by a crankshaft driven by a drive motor to separate the fine particles such as seeds contained in the sand. In addition, the apparatus may further include a blower for removing moisture from the washed sand.

The sediment reduction method and the sediment reduction treatment system of the present invention are a system for forcibly dehydrating and discharging dredged soil containing organic matter in a conventional treatment method without being properly washed, and treating it as waste without recycling. Economic losses were not reduced. In the present invention, however, organic matters such as contaminants or seeds are selected and dehydrated through each of the first, second and third stages, and the volume or weight is reduced to lead to incineration, and the wastewater generated in this process is treated with sewage treatment. The combined treatment does not require a separate wastewater treatment process. In addition, in step 4, the precipitated sand is washed and picked up and dried to reduce the transportation cost by reducing the weight, and to produce sand that can be recycled as a cover agent, thereby significantly reducing the treatment cost of the sediment. There is an economic effect.

1 is a schematic view showing a sediment reduction treatment system
Figure 2 is a process chart showing a method for reducing sediment
3 is a plan view of the storage tank
4 is a front view of the storage tank
5 is a plan view of the primary sorter
6 is a front view of the primary sorter;
7 is a plan view of the secondary sorter
8 is a front view of the secondary sorter
9 is a top view of the sand washer
10 is a front view of the sand washer
11 is a plan view of a secondary screw press
12 is a front view of a secondary cruce press

First, with reference to FIG. 1 and FIG. 2, the whole sediment reduction processing system is demonstrated.

The sediment is introduced into the storage tank 100 by the dredge car dredged over the sediment transport pipe. Considering that when a large amount of sediment and dredged soil is introduced at a time, the storage tank 100 is separated into two of the inflow hopper 121 and the main hopper 151. The inflow hopper 121 and the main hopper 151 are connected to the connection passage, and the control gate 123 for opening and closing the passage in the connection passage is installed (see FIGS. 3 and 4). The main hopper 151 is provided with a separate feeder 160 for transferring the sediment or dredged soil introduced into the main hopper 151 to the primary contaminant sorter 200.

The sediment or dredged soil transported from the separation transporter 160 enters the first contaminant sorter 200 and the sediments contained in the sediment or dredged soil are sorted. The primary contaminant sorter 200 is composed of a rotary screen device 210 and a primary screw press device 260 (see FIGS. 5 and 6). The rotary screen device 210 separates the sediments and sediments contained in the sediment or dredged soil, and discharges the contaminants to the outside of the apparatus through the primary screw press device 260, and the sediment is the lower outflow passage 241. To enter the secondary sorter 300 through.

The secondary sorter 300 for sorting the contaminants in the sediment coming from the primary contaminant sorter 200 through the lower outflow passage 241 is located at the rear of the transfer screw 303 and the transfer screw 303. 330 (see FIGS. 7 and 8). The drum screen 330 separates elongated contaminants such as seeds, threads or hairs contained in the sediment introduced into the interior. Long elongated contaminants such as seeds, yarns or hairs are discharged to the outside through the second screw press 500, and the sediment from which elongated contaminants such as seeds or yarns or hairs are removed is passed through the lower outlet 361 to the sand washer 400. Enter).

The sand washer 400 separates the sand while removing fine contaminants contained in the sediment introduced through the lower outlet 361 of the secondary sorter 300. The sand from which fine contaminants have been removed can be taken out and reused as cover material.

Next, the structure of each component constituting the immersion reduction treatment system will be described in detail with reference to the accompanying drawings.

The structure of the storage tank 100 is shown in FIGS. 3 and 4. The storage tank 100 into which the sediment is introduced is divided into two of the inflow hopper 121 and the main hopper 151 to process over time when a large amount of the sediment and the dredged soil is introduced at once. The inflow hopper 121 and the main hopper 151 are connected to the connection passage 123, and the connection passage 123 is provided with a gate 125 for opening and closing the inflow passage. The gate 125 opens or closes the connection passage 123 by the gate opening and closing device 127. The inflow hopper 121 is larger than the main hopper 151, and the sediment and dredged soil are first stored in the inflow hopper 121 and then transferred to the main hopper 151 through the connection passage 123. The bottom surface of the inflow hopper 121 is inclined so that the sediment and the dredged soil flows to the main hopper 151 together with the washing water.

On the upper side of the main hopper 151 in which the sediment and the dredged soil flows into and is stored therein, a floating contaminant outflow pipe 153 is installed, in which the floating contaminant floating in the water overflows first, and the main hopper 151 is also provided. Auxiliary outflow pipe 155 for preventing the overflow is installed higher than the floating contaminant outflow pipe 153. The floating contaminant outflow pipe 153 is connected to the secondary sorting unit 300 described below, and the floating contaminant that exits through the floating contaminant outflow pipe 153 is processed in the secondary sorting unit 300. In addition, the auxiliary outflow pipe 155 is connected to the sewage process inlet pipe.

The bottom surface of the main hopper 151 has an inclined structure in which the inflow hopper is lower and gradually increases in the outflow direction, and the sediment and dredged soil coming from the inflow hopper 121 are accumulated from the lowest bottom surface. The sediment and dredged soil accumulated on the bottom surface is transported by the separation transporter (160). The bottom surface on which the sediment and the dredged soil is stacked is one end of the separation conveyor 160 and the other end is installed to be inclined to extend longer than the water surface. This structure allows the wash water to be guided to the floating contaminant outflow pipe 153 and only the sediment mixed with sand is led to the sediment outlet pipe 165 of the separation transporter to enter the primary contaminant sorter 200. Separation transporter 160 through the feeder outlet is a structure in which a pair of screw impeller 161 is coupled to the support bearing at the end and fixed. The upper part of the pair of screw impeller 161 is covered with a cover so that odors do not leak. In the center of the upper part of the cover, a long check opening is installed for maintenance or operation check.

The structure of the primary contaminant sorter 200 is shown in FIGS. 5 and 6. The first separator (200) for selecting contaminants from the settled material and dredged material flowing through the settler outlet pipe is composed of a rotary screen (210) and a primary screw press (250). The rotary screen 210 has a plurality of main ring 223 is provided between the plurality of main ring 223 to separate the contaminants sandwiched between the screen portion and the main ring to maintain a constant gap to guide the primary screw press (250) A contaminant separator consisting of an auxiliary ring 225, and an injection mechanism 237 through which washing water is sprayed to wash down the contaminants spread over the plurality of main rings 223.

A screen for maintaining a constant gap by having a gap adjusting washer between a plurality of main rings 223 is rotated by a drive chain 203 connected to a drive motor 201, and a contaminant separator comprising a plurality of auxiliary rings 225. Also rotated by the drive chain 205 for transmitting the rotational force of the drive chain 203 connected to the drive motor 201. The coarse contaminants contained in the sediment and dredged soil falling onto the plurality of main rings 223 are separated by a contaminant separator consisting of a plurality of auxiliary rings 225 and then enter the primary screw press 250 and onto the sediment and dredged soil. The included sand and fine contaminants fall down through the gap between the plurality of main rings 223 and then enter the inlet 301 of the secondary sorter 300 via the sand outlet 241.

The structure of the secondary contaminant sorter 300 is shown in FIGS. 7 and 8. Since the secondary contaminant selector 300 is for separating fine contaminants contained in the sediment and the dredged soil, coarse contaminants included in the sediment and the dredged soil were first removed by the primary contaminant sorter 200, and thus the second contaminants. A drum screen is used as the sorter 300. The drum screen includes a transfer screw 303 driven by the drive motor 351 and a drum screen 330 positioned at the rear end of the transfer screw 303. One side of the cylindrical body is formed with an inlet through which the sand transported along the conveying screw 303 is introduced, and a contaminant outlet is formed on the opposite side. The drum screen 330 is a lying cylindrical body, in which a plurality of holes are formed in the circumferential surface of the cylindrical body, and a rib 313 formed in a spiral shape is formed inside the cylindrical body. The diameter of the holes drilled in the circumferential surface of the cylinder is determined by the size of the sand to be screened.

Sand and fine dredged soil containing sand and fine contaminants entering the inlet 301 of the drum screen 330 is transferred along the transfer screw 303 as the driving motor is driven to the drum screen 330 located at the rear end. do. Sediment and dredged soil containing sand and fine contaminants entering the drum screen are transported along the spiral rib 313 formed inside the cylindrical body. The sand and the fine contaminants contained in the sediment and the dredged soil are transported along the spiral ribs 313 formed inside the cylindrical body, exiting the cylindrical body through the holes drilled in the circumferential surface of the cylindrical body, and the lower connection pipe. Enter the sand washer 400 via (361).

On the other hand, long slenders such as sand, seeds, threads, or hairs larger than the holes drilled on the circumferential surface of the cylindrical body do not escape the holes, are transported along the ribs 313 in the cylindrical body, and the contaminant outlet 313 Comes out through. The long, narrow contaminants such as large sand, seeds, threads or hairs that come out through the contaminant outlet 317 enter the secondary screw press 500 and are dehydrated and processed. While the sediment and the dredged soil are transported along the conveying screw 303, the high pressure water is washed through the nozzle 361 so that the hole in the surface is blocked by thin and long contaminants such as sand, thread or hair. prevent.

The structure of the sand washer 400 is shown in FIGS. 9 and 10. The sand washer 400 is opened upward to allow sand to enter through the lower outlet 361 of the secondary contaminant sorter 300, and the sand having the inclined bottom surface having a low and gradually increasing portion of the sand coming in. It has a receiving hopper 401. Sand hopper 401 is filled with water up to a certain height to remove and wash the fine particles contained in the sand. A sand discharging mechanism 410 is provided along the inclined bottom surface of the sand accommodating hopper 401.

The sand discharging mechanism 410 shakes the collecting scraper unit 411 and the conveying scraper unit 413 and the collecting scraper unit 411 and the conveying scraper unit 413 installed along the inclined bottom surface of the sand receiving hopper 401. Swing mechanism 420 is included. The collection scraper unit 411 collects sand, and the transport scraper unit 413 is shaken by the swing mechanism 420 to raise the collected sand up. The swing mechanism 420 connects both sides of the upper portion of the conveying scraper unit 413 to the four-jointed support 431 and pushes and pulls the support 431 to shake the collecting scraper unit 411 and the conveying scraper unit 413. .

That is, the connection points of the first joint 431a and the second joint 431b of the support 431 are connected to pivot about the first cross bar 433, and the third joint 431c of the support 431 and The connection point of the fourth joint 431d is configured to pivot about the second crossbar 435. The first cross bar 433 is fitted to the main cam mechanism 425, and the second cross bar 435 is fitted to the sub cam mechanism 435. The main cam mechanism 425 and the sub cam mechanism 429 are connected by a connecting rod 427, and the main cam mechanism 425 is connected to the crankshaft 423 which is rotated by the drive motor 421. have.

A first support bar 441 connected to the first support 437 having one end fixed thereto is coupled to the main cam mechanism 425. The third crossbar 443 is connected to the main cam mechanism 425 and the first support bar 441. A second support bar 445 is connected to the auxiliary cam mechanism 429, which is connected to the second support 439 having one end fixed thereto. A fourth crossbar 447 is connected to the auxiliary cam mechanism 429 and the second support bar 445.

Therefore, when the crankshaft 423 is rotated by the drive motor 421, the main cam mechanism 425 rotates about the third crossbar 443 along the crankshaft 423, and the fixed first support bar. Advance and retreat about one end of (441). As the main cam mechanism 425 rotates, moves forward and retracts, the auxiliary cam mechanism 429 connected by the main cam mechanism 425 and the connecting rod 427 rotates, moves forward, and retracts.

Accordingly, as the main cam mechanism 425 moves up or down and moves forward or retracts, the first cross bar 433 fitted to the main cam mechanism 425 also moves up or down and moves forward or backward. In addition, the sub cam mechanism 429 connected to the main cam mechanism 425 and the connecting rod 427 also moves up or down and moves forward or backward, and the second cross bar 435 fitted to the sub cam mechanism 429 also moves up. Ascend or descend, advance or retreat.

Transfer connected to the support 431 into which the first cross bar 433 and the second cross bar 435 are fitted as the first cross bar 433 and the second cross bar 435 move up or down and move forward or retreat. The scraper unit 413 moves up or down and moves forward or backward. Therefore, as the conveying scraper unit 413 moves up or down and moves forward or retracts, the conveying scraper unit sways up, down, left and right. When the conveying scraper unit 413 is shaken up, down, left and right, the sand collected by the collecting scraper unit 411 rises up along the conveying scraper unit 413 and is discharged to the outside through the sand outlet 415. .

At this time, since the lower portion of the scraper is located in the sand-filled hopper 401 is filled with water, the fine particles contained in the sand while the conveying scraper unit 413 is shaken up, down, left and right out into the water. While the conveying scraper unit 413 is shaken, air may be blown under the portion of the conveying scraper unit 413 positioned in the water to better escape the fine particles contained in the sand. Blowing air down the portion of the conveying scraper unit is achieved by installing the air supply pipe 419 connected from the air blow mechanism 417 and the air blow mechanism 417 under the portion of the conveying scraper unit 413 in the water. .

The sand placed on the conveying scraper unit 413 is continuously turned upside down while the conveying scraper unit 413 is shaken up, down, left, and right. By being discharged, it can be used as a cover agent. A blower 451 which blows air so that the sand rising upwards by the transfer scraper unit 413 to dry quickly is installed, and the air discharge unit 455 connected to the blower 451 and the air discharge pipe 435 is provided at the sand outlet. 415 may be disposed around.

The structure of the secondary screw press 500 is shown in FIGS. 11 and 12. The secondary screw press 500 squeezes the fine contaminants filtered from the drum screen 300 and squeezes water and discharges them to the outside. The secondary screw press 500 is provided with an inlet 501 through which fine contaminants filtered from the drum screen 300 enter. The body 511 is tapered from the inlet 501 toward the contaminant discharge port 503, and a water discharge hole through which a water discharge hole through which water from the fine contaminant is discharged is extended, and within the body 511. The tapered screw 513 is positioned along the shape of the body portion 511. The lower portion of the body portion 511 is provided with a connecting pipe 505 so that the water contained in the fine contaminants exited through the water discharge hole enters the sewage treatment process, and the deodorizing and exhausting mechanism 507 is disposed above the body portion 511. ) Is installed.

The fine contaminants entering the inlet 501 are squeezed between the tapered body portion 511 and the tapered screw 513 while moving along the screw 513 driven by the motor 521 and fall into the contaminant outlet 503. I'm going. At this time, the water contained in the fine contaminants fall down through the water discharge hole of the body portion 511 and enters the sewage treatment process through the lower connection 돤 505.

No. 523 is a motor side sprocket driven by the motor 521, and 525 is a screw side sprocket driven by the motor side sprocket 523.

The present invention is a sediment generated in various sedimentation tank storage tank, such as sedimentation of sewage treatment plant sewage treatment plant sewage treatment plant and sediments deposited in the pumping station or reservoir, and various sediments generated during cleaning of sewage pipes or sediments, or dredged soil containing sand Are separated into large organic matters (wood textiles vinyl) and fine microorganisms (seed fibrous), which are separated by filtration and separated and dehydrated and moved to incineration treatment, and sands, which are inorganic matters, are separated and washed to cover soil of landfills. Purified wastewater that is recycled and contains a small amount of organic matter can be effectively reduced in waste by separating and discharging it into incinerators, coveralls, and treated water by merging them into existing sewage treatment processes.

Claims

Storing the sediment in a storage hopper;
Transferring the sediment stored in the storage hopper to a rotary screen sorter to separate a mixture of contaminants, seeds and sand;
Transferring the contaminants to a first screw press to remove moisture;
Transferring the mixture of seeds and sand to a drum screen to separate the seeds and sand;
Transferring the separated seeds to a second screw press to remove moisture;
Taking out the contaminants from which moisture has been removed and the seeds from which the moisture has been removed;
A method for reducing sediment reduction by transferring sand to a sand washer and washing the sand while blowing air from the bottom of the sand washer.

The method according to claim 1,
The storage hopper is divided into an inflow hopper and the main hopper, the sediment reduction processing method in which the sediment flowing into the inflow hopper is introduced into the main hopper through a control gate.

The method according to claim 1,
The washed sand is removed from the water by the blower, the sediment reduction treatment method is carried out to the outside.

A hopper for storing the sediment;
A rotary screen sorter for separating the sediment stored in the storage hopper into a mixture of contaminants, seeds, and sand;
A first screw press for removing moisture from the contaminants;
A drum screen for separating the seed and sand mixture into seeds and sand;
A second screw press for removing moisture from the separated seeds;
A sand washer for washing the sand separated by the drum screen and transporting the sand to the outside;
And an air blower mechanism for blowing air from under the sand entering the sand washer.

The method of claim 4,
The storage hopper is composed of the inlet hopper, the main hopper and the control gate, the sediment reduction processing system in which the immersion introduced into the inflow hopper is introduced into the main hopper through the control gate.

The method according to claim 5,
The sand washing machine comprises a transfer scraper unit which is moved up and down and left and right by a crankshaft driven by a drive motor to separate the fine particles such as seeds contained in the sand.

The method of claim 6,
And the sand washer further comprises a blower for removing water from the washed sand.