JP2003159505A - Separating and dewatering apparatus for screenings - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a separating and dewatering apparatus for screenings having a compact tank capacity to separate and treat a screenings-and-water mixture collectively flowing in a short time. <P>SOLUTION: This apparatus comprises a casing 39, a spiral transport wing body 40 arranged inside the casing 39, and a drive device 41 driving the transport wing body 40 to rotate. The one end of the casing 39 is separated and submerged in a holding tank 30 for screenings. The casing 39 comprises a draining part 42, a transport part 43 and a compressing/dewatering part 44. An inflow port 45 is formed so as to open in opposite to a screen 31 on the upperside of the draining part 42. A discharge port 47 is formed to communicate with a discharge duct 46 on the underside of the compressing part 44. The underside section of the draining part 42 is formed of a porous member 48. The transport wing body 40 comprises a spiral wing 49 with a wing spirally arranged in a section corresponding to the draining part 42, a screw wing 51 with wings spirally arranged around the rotating axis 50 in a section corresponding to the transport part 43, and a cutting-down wing 52 with the wing body spirally arranged in an opposite direction to the screw wing 51 in a section corresponding to the compressing/dewatering part 44. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen residue separation and dehydrator, and relates to a screen residue removal technique in wastewater treatment facilities such as sewage treatment facilities.

[0002]

2. Description of the Related Art Conventionally, in a sand basin in a sewage treatment facility,
For example, there is one as shown in FIGS. As shown in FIG. 4, the sand basin 1 is provided with a sand raising device 2 and a sand collecting device 3, and the sand raising device 2 lifts the sand collected in a sand pit 4 formed at the bottom of the sand basin 1. To do. As shown in FIG. 5, the sand lifting device 2 is provided with a jet pump 6 at the lower end of the sand lifting pipe 5, and the jet pump 6 is provided with a receiving pipe 7 provided at the lower end of the sand lifting pipe 5 and an opening of the receiving pipe 7. The jet nozzle 8 is disposed so as to face the high pressure water 9 from the jet nozzle 8.
The high-pressure jet water stream 11 mixed with the air 10 is jetted up to the receiving pipe 7, and the negative pressure created by this jet draws the surrounding sand and residue together with the water flow and pushes it into the receiving pipe 7 with the high-pressure jet water flow.

The sand collecting device 3 has a plurality of nozzles 12 arranged in multiple stages. The sand collecting device 3 collects sand in the sand pit 4 by injecting high-pressure water from the nozzles 12 toward the sand pit 4. A dust remover 13 is arranged at the inlet of the sand basin 1, and the residue in the inflow water removed by the dust remover 13 is transported by the transport device 1
In step 4, the residue is conveyed to the residue pressurizing device 15. As shown in FIG.
The screen residue feeding device 15 has a tank 17 for storing the screen residue crushed by the crusher 16 and a horizontal jet pump 18 provided under the tank 17, and transfers the screen residue by a high pressure jet water stream. is there.

The pressurized water pump equipment 19 is a pressurized water tank 20.
And the pump 21, and through the high-pressure water supply pipes 22 and 23, the jet pump 6 of the sand lifting device 2, the nozzle 12 of the sand collecting device 3, and the horizontal jet pump 1 of the residue pumping device 15.
The high pressure water for driving is supplied to 8.

The jet pump 6 is connected to a sand settling separator 25 through a sand settling conveying line 24 connected to the sand raising pipe 5, and the screen residue pressure feeding device 15 is set at a screen residue conveying line 26 and the screen residue separating device 2 is formed.
Connected to 7.

Examples of the residue separator 27 include a drum screen type, a rotary rake type, a storage tank integrated type automatic dust remover and a screw dehydrator.

[0007]

A large amount of the screen residue mixed water is temporarily pumped to the screen residue separator 27 by the screen residue pumping device 15. For this reason, it is necessary to set the processing capacity of the residue separation device 27 in accordance with the maximum inflow amount, which is an excess facility having an excessive processing capacity with respect to the average processing amount.

Further, there is a problem that the apparatus itself such as a hopper for temporarily storing becomes large, and a space for arranging the apparatus cannot be secured, and installation itself becomes impossible. The present invention is to solve the above-mentioned problems, and an object thereof is to provide a residue separation dehydrator capable of separating and treating concentrated residue water that flows intensively in a short time in a compact tank capacity. .

[0009]

In order to solve the above-mentioned problems, the residue-separating and dehydrating machine of the present invention according to claim 1 is a residue-mixing water that flows through a carrier pipe with a high-pressure water stream as a carrier fluid. A method for separating and dehydrating mustard residue, a primary drainer formed by a screen that is arranged so as to face the opening of the transfer pipeline, and a separate residue storage tank that stores drainage drained by the primary drainer , A separation and dehydration device that is separated and installed in the residue storage tank, and the separation and dehydration device has a cylindrical casing in which one end is separated and placed by immersion in the residue storage tank, and an axial center that is disposed in the casing. It has a spiral conveyor blade that rotates around and a drive device that is arranged at the other end of the casing located outside the tank and that rotationally drives the rotation axis of the conveyor blade, and the casing is sequentially arranged from the lower end side. It has a drainer, a conveyor, and a compression dehydrator, An inflow port that opens toward the screen is formed on the surface side, a discharge port that communicates with the discharge duct is formed on the lower surface side of the compression dehydration section, and the lower surface side portion of the water draining section is formed with a porous member, The wing body has a spiral wing in which only the wing body is spirally arranged at the part corresponding to the draining part, and a screw wing in which the wing body is spirally arranged around the rotation axis at the part corresponding to the transport part. In addition, the blade body is provided with a cutting blade in which the blade body is arranged in a reverse spiral shape with the screw blade at a portion corresponding to the compression dehydration portion.

With the above-mentioned structure, the primary draining device roughly drains the mixed residue water flowing from the carrier pipe to separate the residue. At this time, the screen of the primary drainer is in an inclined state, and the residue mixed water flowing through the transfer pipe comes into contact with the screen with residual energy derived from the high-pressure water flow, so it is separated on the drainer. The residue is drained continuously while efficiently rinsing it with the subsequent mixed residue water. In this way, by using the residual energy of the residue mixed water as a driving force for separating and removing the residue from the screen, the residue on the screen can be efficiently separated and a high-pressure water stream is generated. It is possible to increase the power efficiency of the entire equipment by effectively utilizing the pump power used for.

By separating most of the water from the residue-mixed water by the screen of the primary drainer, the separated residue storage tank stores almost only the drained residue, and a large amount of residue residue is mixed. Even when water flows in, the volume of the tank can be designed only by the amount of contained sludge, resulting in a compact size.

By separating a large amount of separated residue in a compact tank capacity and storing the residue, the separation dehydrator separates the separated residue accumulated in the lower part of the residue storage tank by an amount corresponding to the dehydration capacity. It can be quantitatively cut out and drained, conveyed, and compressed and dehydrated.

In the separation dehydrator, the spiral wing, the screw wing, and the cutting wing are integrally rotated by the driving device rotatingly rotating the rotary shaft of the conveying wing body, and the residue that flows into the casing from the inflow port is removed. It is conveyed upward toward the discharge port. In the draining section, the spiral residue is pulled up by the spiral blade while being drained by the porous member on the lower surface side, and the drained residue is conveyed upward by the screw blade in the conveying section, and is extruded from the conveying section in the compression dehydration section. The residue is received by a back pressure plate placed on the other end of the casing and dehydrated while being compressed, and the compressed residue is cut out to the discharge port by a cutting blade that is a spiral shape opposite to the screw blade, and is discharged to the outside through a discharge duct. .

It has been proved as an empirical rule that the compressed residue can be smoothly discharged by opening the discharge port in a rectangular shape when discharging from this discharge port to the discharge duct.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. This embodiment is based on the configuration described above with reference to FIGS. 4 to 6, and the description thereof will be omitted. 1 to 3, the residue transfer pipeline 2
6 is for transferring the residue as mixed residue water by a high-pressure water flow as a carrier fluid.
5 and a pressurized water pump facility 19 are provided.

A screen 31 forming a primary drainer is disposed inside the separated residue storage tank 30 of the residue separation / dehydration machine 29 communicating with the residue transfer pipeline 26.
Is formed by a wedge wire or the like, which is inclinedly arranged so as to face the opening 32 of the transport pipeline 26. Screen 31
Is separated and the inner area of the residue storage tank 30 is drained with a screen 31 to store the residue, and is divided into a storage area 34 composed of a residue storage section 33a and a desorption water storage section 33b and a separated water area 35. A separated water drain pipe 36 is connected to the bottom of the separated water region 35 of the separated residue storage tank 30, and a desorbed water discharge pipe 37 is connected to the desorbed water storage part 33b of the storage region 34.

The separating / dehydrating machine 38 drains and removes the residue and conveys it. The separating / dehydrating machine 38 is installed so that the lower end side is separated and immersed in the residue storage tank 30 and inclined obliquely upward, and the storage area 34 is removed. It is divided into a residue storage section 33a and a desorption water storage section 33b.

The separation and dehydrator 38 separates one end to remove the residue storage tank 3.
0 has a cylindrical casing 39 to be immersed and placed,
A drive device 4 in which a spiral conveying blade body 40 that rotates around an axis is arranged inside the casing 39, and the rotation axis of the conveying blade body 40 is rotationally driven at the other end of the casing 39 located outside the tank.
1 is arranged.

The casing 39 has a draining section 42, a conveying section 43, and a compression dehydration section 44 in order from the lower end side, and an inflow port 45 is formed on the upper surface side of the draining section 42 so as to face the screen 31. A drain port 47 communicating with the drain duct 46 is formed on the lower surface side of the compression dehydration unit 44, and the draining unit 4
The lower surface side portion of 2 is formed by a porous member 48 such as punching metal. The discharge port 47 has a rectangular shape opening over the diameter width of the casing 39.

The transport wing body 40 has a spiral wing 49 in which only the wing body is spirally arranged at a portion corresponding to the draining portion 42, and the wing body is provided around the rotating shaft 50 at a portion corresponding to the transport portion 43. The screw blades 51 are arranged in a spiral shape, and the cutting blades 52 are arranged in a portion corresponding to the compression / dehydration unit 44 in a spiral shape opposite to the screw blades 51.
Located at the end of 4 behind the cutting blade 52 and the casing 39
A back pressure plate 53 is arranged at the other end of the.

The compressed dewatering section 44 has a desorption water storage section 3 at its tip.
A drain pipe 54 communicating with 3b is provided, and the casing 3
The water sprinkling pipe 55 arranged at the upper part of 9 sprinkles water to the water draining part 42 and the compression dewatering part 44 at the beginning of operation.

The operation of the above configuration will be described below. In the residue separation / dehydration machine 29, the residue mixed water separated from the residue transfer pipeline 26 and flowing into the residue storage tank 30 is roughly drained by a screen 31 which is a primary drainer to separate the residue and separate the residue. Is stored in the residue storage portion 33a of the storage area 34, and the separated water that has passed through the screen 31 is drained from the separated water area 35 to the outside through the separated water drain pipe 36.

At this time, the screen 3 of the primary drainer
1 is in an inclined state, and the mixed residue water flowing through the residue transfer pipeline 26 abuts the screen 31 with residual energy derived from the high-pressure water flow, so that the separated residue on the screen 31 is removed. Draining is continuously performed while efficiently rinsing the subsequent screened residue mixed water.

As described above, by utilizing the residual energy of the residue mixed water as the driving force for removing the separated residue from the screen 31, the residue on the screen 31 can be efficiently separated. It is possible to effectively utilize the pump power of the pressurized water pump facility 19 used to generate the high-pressure water stream, and to enhance the power efficiency of the entire facility.

By separating most of the water from the screen residue mixed water with the screen 31 of the primary draining device, the screen residue storage part 33a of the storage area 34 of the screen residue storage tank 30 is separated to contain only the screened residue. Therefore, even if a large amount of mixed residue water flows in, the tank volume can be designed only by the amount of contained residue, and the size becomes compact.

In the separating and dehydrating machine 38, the driving device 41 rotationally drives the rotating shaft 50 of the conveying blade body 40, whereby the spiral blade 49, the screw blade 51, and the cutting blade 52 are integrally rotated, and the inlet 45 is rotated. The residue flowing into the casing 39 is conveyed upward toward the discharge port 47.

In the water draining section 42, the spiral blade 49 is used to drain the screen residue while pulling it upwards with the porous member 48 on the lower surface side, and the drained screen residue is fed to the screw blade 5 in the conveying section 43.
1 conveys upward, and in the compression dehydration section 44, the conveying section 43
The backpressure plate 53 receives the residue of the waste that is extruded from the container and dehydrates it while compressing it, and the compressed residue is cut out to the discharge port 47 by the cutting blade 52 that is in a spiral shape opposite to that of the screw blade 51, and is passed through the discharge duct 46 to the outside. To discharge.

When discharging from the discharge port 47 to the discharge duct 46, as shown by the broken line in FIG. 3, when the discharge port 47 has a circular or elliptical shape, the cut-out residue remains without being discharged. Dead space α is generated, but discharge port 4
It has been found as an empirical rule that the compressed residue can be smoothly discharged by opening 7 in a rectangular shape.

[0029]

As described above, according to the present invention, by utilizing the residual energy of the residue mixed water in the primary drainer, the residue can be efficiently separated by the screen, and the pump power is effective. It can be used to increase the power efficiency of the entire equipment, and by storing only the sludge that has been separated and drained from the sludge storage tank, even if a large amount of the sludge mixed water flows in, it is included. It is possible to make a compact tank capacity based only on the amount of residue, and by separating and storing a large amount of residue in a residue storage tank with a compact tank capacity,
The separation dehydrator can perform draining, compression dehydration, and transportation in an amount corresponding to the dehydration capacity, and the separation capacity can be set to an appropriate one that matches the averaged capacity such as the inflow amount per hour.

In the separation dehydrator, the casing has a draining section,
A transport unit and a compression dehydration unit are provided, and a spiral wing is attached to the transport wing body.
By installing screw blades and cutting blades, draining, dehydration,
The compression can be performed efficiently, and the compressed residue can be reliably cut out by the cutting blades and smoothly discharged from the rectangular discharge port.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a screen residue separation / dehydration machine according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of the same residue separation dehydrator.

FIG. 3 is an enlarged view of a main part of the same residue separation dehydrator.

FIG. 4 is a schematic diagram showing a configuration of a sand basin in a sewage treatment facility.

FIG. 5 is an explanatory view showing the action of the jet pump.

FIG. 6 is a schematic diagram showing a screen residue pumping device.

[Explanation of symbols]

26 Screen transfer line 29 Screen residue separation dehydrator 30 Separation and residue storage tank 31 screen 32 openings 33a Residue storage area 33b Desorption water storage section 34 Storage area 35 Separated water area 36 Separated water drain pipe 37 Desorption water discharge pipe 38 Separation dehydrator 39 casing 40 Transport wing 41 Drive 42 Drainer 43 Transport section 44 Compression dehydration unit 45 Inlet 46 Exhaust duct 47 outlet 48 Perforated member 49 spiral wings 50 rotation axis 51 screw wing 52 cutting wings 53 Back pressure plate 54 drainage pipe 55 Water pipe

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B01D 29/30 501 (72) Inventor Yoshio Kitagawa 1-247 Shikitsu East, Naniwa-ku, Osaka City, Osaka Prefecture Kubota's F term (reference) 4D041 AA01 AA02 AB02 AB15 AB17 AB24 4D059 AA01 BE02 BE11 BE13 BE51 CB06 CB27 4D066 AA05 BA05 BB03 BB14 BB34

Claims (2)

[Claims] 1. A method for separating and dehydrating dross from a mixed water mixture, which flows through a transport line accompanied by a high-pressure water flow as a transport fluid, and which is formed by a screen that is arranged so as to face an opening of the transport line. It has a primary dewatering device, a separated debris storage tank that stores the debris drained by the primary dewatering device, and a separation dewatering device that is separated and installed in the debris storage tank. Cylindrical casing to be immersed and placed in the residue storage tank, spiral conveying blades arranged inside the casing and rotating around the axis, and conveying blades arranged at the other end of the casing outside the tank The casing has a drive device for rotationally driving the rotating shaft of the body, and the casing has a drainer, a conveyer, and a compression dehydrator in order from the lower end side, and a flow opening facing the screen on the upper surface side of the drainer. An inlet is formed, and a drainage duct is provided on the lower surface side of the compression dehydration unit. The drainage part has a spiral blade in which only the wing body is spirally arranged at the part corresponding to the drainage part. , A cutting blade having a screw blade in which a blade body is spirally arranged around the rotation axis at a portion corresponding to the conveying portion, and the blade body is arranged in a spiral shape opposite to the screw blade at a portion corresponding to the compression dehydration portion. A screen residue separation dehydrator characterized by having. 2. The screen residue separation and dehydrator according to claim 1, wherein the discharge port is opened in a rectangular shape.