JPH10305298A - Integrated screenings cleaning and dehydrating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive integrated screenings cleaning and dehydrating device making screenings sanitary and easy to handle, having a simple structure, made more compact and capable of being continuously operated. SOLUTION: This integrated screenings cleaning and dehydrating device consists of an agitating and cleaning chamber 12a having a a cleaning water feed pipe for cleaning screenings and an agitator for agitating the cleaning water, a cleaning water discharge chamber 12b having a level control weir 18 and a cleaning water discharge port, a screen 31 for separating screenings from cleaning water, a screw conveyor 32 for conveying the separated screenings, a press part 33 for compressing and dehydrating the conveyed screenings and a screen-type screenings remover 30 having a discharge part for discharging the compressed and dehydrated screenings. The agitating and cleaning chamber 12a and the cleaning water discharge chamber 12b are partitioned by the remover 30, and the cleaning water in the agitating and cleaning chamber 12a is passed through the screen of the remover 30 and transferred to the cleaning water discharge chamber 12b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage cleaning and dewatering apparatus for separating and removing sewage from sewage generated from a sewage treatment plant in a sanitary and easy-to-handle manner. The present invention relates to an apparatus for cleaning and dewatering residue.

[0002]

2. Description of the Related Art In a sewage treatment facility or the like, sewage is treated by a scum residue removing device, and sewage is discharged. This residue, as it is, contains a large amount of human feces and putrefactive organic substances, and has a high water content. Therefore, it is unsanitary and has poor handling when transporting. In addition, in landfills such as landfills, it causes odor and groundwater pollution. Therefore, it is very important to wash the residue discharged from the residue removing device in a sanitary manner to prevent environmental pollution, and to dehydrate the residue in order to improve the handleability of the residue.

Conventionally, various types of washing apparatuses and dehydrating apparatuses are used alone or in combination as appropriate for washing and dewatering the residue.

However, if the above-mentioned conventional residue cleaning and dewatering apparatus is used alone, either of the cleaning and dehydration is not sufficient. In addition, the combination use requires a large amount of equipment and therefore requires a large scale, so that it is expensive, occupies a large installation space, and the driving operation is complicated.

[0005] In addition, a washing apparatus is provided in the residue removing device itself, and the residue is washed in the process of removing the residue from the wastewater. However, in this case, the amount of washing water becomes excessive with respect to the amount of the residue to be removed, and the washing effect cannot be expected much.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a compact and inexpensive sediment washing and dewatering apparatus which makes the sediment separated and removed from sewage sanitary and easy to handle. With the goal. It is still another object of the present invention to provide an integrated residue cleaning and dewatering apparatus having a simple configuration and a simple operation.

[0007]

According to the present invention, there is provided an integrated cleaning and dewatering apparatus for cleaning residue, comprising: (a) a stirring and cleaning chamber having a cleaning water supply means for cleaning the cleaning residue and a stirring device for stirring the cleaning water;
(B) a washing water discharge chamber having an overflow weir for adjusting the water level and washing water drainage means, (c) a screen for separating the residue from the washing water, and a screw conveyor for transporting the separated residue. A press unit for compressing and dewatering the conveyed residue, and a screen-type residue removing device having a discharge unit for discharging the compressed and dewatered residue, the agitation cleaning chamber and the cleaning water discharge chamber, The screen is separated by the screen-type residue removing device, and the washing water in the agitation washing chamber passes through the screen of the screen-type residue removing device and moves to the washing water discharge chamber.

When the agitation washing chamber and the washing water discharge chamber are partitioned by the screen-type screen of the residue removing apparatus, a partition member may be provided to separate the two chambers.

The stirring device for stirring the washing chamber is preferably a mechanical stirrer, a diffuser for aeration and stirring, or a washing water spray nozzle for spraying high-pressure washing water.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a basic conceptual diagram of an integrated residue cleaning / dewatering apparatus of the present invention. FIG. 2 shows the concept of the division between the agitation washing chamber and the washing water discharge chamber clarified by the partition member.

The washing water discharge chamber may be of a type whose whole upper part is open as shown in FIGS. 1 and 2 or a type whose part is closed as shown in FIG. Good.

According to a first aspect of the present invention, there is provided an integrated residue cleaning / dewatering apparatus comprising: (a) a cleaning residue supply inlet; a cleaning water supply means for supplying cleaning water for cleaning the residue; And (b) a screen-type residue removing device 30 for separating and removing the residue from the washing water in the stirring and cleaning room, and (c) the screen-type residue removing device. A washing water discharge chamber 12b having a drainage means for discharging the washing water from which the residue has been separated and removed, and an overflow weir for adjusting the water level is provided. Then, the screen-type residue removing device 30 is disposed between the agitation washing chamber 12a and the washing water discharge chamber 12b as shown in FIG.
An annular screen 31 that is partially open and separates and removes residues mixed in the washing water when the washing water passes, and a screw that scrapes and transports the residues separated on the inner surface of the annular screen 31 A conveyor 32, a press unit 33 for compressing and dewatering the residue transferred by the screw conveyor 32, and an unloading unit 34 for discharging the compressed and dewatered residue.
And

According to a second aspect of the present invention, there is provided an integrated residue cleaning / dewatering apparatus comprising: (a) a cleaning residue supply inlet; cleaning water supply means for supplying cleaning water for cleaning the residue; And (b) a screen-type residue removing device 50 for separating and removing the residue from the washing water in the stirring and cleaning room, and (c) the screen-type residue removing device. A washing water discharge chamber 12b having a drainage means for discharging the washing water from which the residue has been separated and removed, and an overflow weir for adjusting the water level is provided. As shown in FIG. 6, the screen-type residue removing device 50 is disposed between the agitation washing chamber 12a and the washing water discharge chamber 12b to divide the two chambers and has an opening for introducing washing water. A rotary drum screen 51 that mixes in the wash water and separates the residue; a hopper 52 that receives the residue from the screen 51;
A screw conveyor 32 that drops the hopper 52 and conveys the residue, a press unit 33 that compresses and dewaters the residue conveyed by the screw conveyor 32, and a discharge unit 34 that discharges the compressed and dewatered residue. And

Further, according to the third aspect, the integrated residue cleaning / dewatering apparatus comprises: (a) a cleaning residue supply inlet; a cleaning water supply means for supplying cleaning water for cleaning the residue; A stirring and washing chamber 12a having a stirring device for stirring, (b) a screen-type residue removing device 70 for separating and removing residue from the washing water in the stirring and cleaning room, and (c) a screen-type residue removing device. Wash water discharge chamber 1 having a drain means for discharging the wash water from which the residue has been separated and removed, and an overflow weir for adjusting the water level.
2b. As shown in FIG. 7, the screen-type residue removing device 70 is disposed between the agitation washing chamber 12a and the washing water discharge chamber 12b to divide the two chambers,
An annular screen 71 having an opening for introducing washing water and separating sediment mixed in the washing water, a rotary rake 72 for scraping the sediment separated on the inner surface of the screen 71, and a rotary rake 72 for scraping; A scraper (not shown) for scraping off the removed residue, a hopper 52 for receiving the residue scraped off by the scraper, a screw conveyor 32 for transporting the dropped residue to the hopper 52, and the screw conveyor A press unit 33 for compressing and dewatering the residue conveyed at 32 is provided, and a discharge unit 34 for discharging the compressed and dewatered residue. It should be noted that the scraper is not necessarily provided.

Each of the above embodiments will be described in detail below.

FIG. 4 is a schematic sectional view showing a first embodiment of the integrated residue cleaning / dewatering apparatus of the present invention. FIG.
FIG. 5 is a partially cutaway perspective view showing a screen-type residue removing device used in the integral-type residue washing / dewatering device of FIG. 4.

In FIG. 4, an integrated type residue cleaning / dewatering apparatus 1 is shown.
0 is a stirring and washing chamber 1 having a charging port 11 for charging residue.
2a and a washing water discharge chamber 12b having washing water drainage means. The stirring washing chamber 12a and the washing water discharge chamber 12b form an integrated washing tank 12. The stirring and washing chamber 12a has a washing water supply unit 13 for supplying the washing water for washing the residue to the stirring and washing chamber 12a, and a stirring to stir the water in the stirring and washing chamber 12a to crush and wash the residue. Machine 14 is provided. Further, the washing water discharge chamber 12b is provided with a washing water discharging means 15 for discharging the washing water and a screen type residue removing device 30 for separating and removing the washed residue from the washing water in the agitation washing chamber 12a. ing. The screen type residue removing device 30 is disposed between the stirrer 14 and the washing water discharging means 15. The washing water supply unit 13 has a water supply valve, and the washing water discharge means 15 has a drain valve.

Referring to FIG. 5, a screen-type residue removing device 30 includes a fixed screen 31 having a plurality of linear wedge screen members arranged so as to form a plurality of linear gaps, and an opening 31a formed in a part thereof. A screw conveyor 32 that is close to the inner peripheral surface of the screen 31 and scrapes and transports the washed and separated residue separated on the inner peripheral surface of the screen 31.
And a press unit 33 for compressing and dewatering the residue conveyed by the screw conveyor 32, and an unloading unit 34 for discharging the residue after washing and dehydration to the outside.

The screen may be a bar screen or a punch metal screen.

In the case shown in the figure, an opening 31a is formed in a substantially cylindrical space formed by an arrangement of wedge screens.
Are formed by end faces on both sides in the axial direction of the cylindrical space and an upper rectangular surface connecting these end faces. A screw conveyor 32 enters the screen 31 from one of the end faces (openings). From the other of the end faces and the upper rectangular face,
Wash water enters the screen and passes through the linear gap in the screen. At this time, the residue remains on the screen. The screen-type residue removing device 30 is the same as that described in FIG. 2 of JP-A-2-43908, FIG. 4 of JP-A-3-2410, and JP-A-4-35704. Equivalent to.

As described above, as a basic concept, the agitation washing chamber 12a and the washing water discharge chamber 12b are separated by a screen type residue removing device 30. However, specifically, the agitation washing chamber 12a and the washing water discharge chamber 12b are screen-type and are separated by a residue removing device or a partition member, and further complemented by a guide plate or another partition plate. Is also good.

In FIG. 4, a guide plate is provided between the agitated washing chamber 12a and the washing water discharge chamber 12b so that essentially all of the agitated and washed residue is easily introduced into the opening 31a of the screen 31. It is preferable to provide 35 or the like. Alternatively, the periphery of the opening 31a of the screen 31 may be sealed and connected to the edge of the guide plate 35 with packing or the like.

It is preferable that the screw conveyor 32 has a structure in which the transfer of the residue is smooth by changing the screw pitch and the like, and the drainage is good.

The press unit 33 is provided at a level higher than the water level L in order to efficiently dehydrate the washed residue. Then, the sewage flowing out during the dehydration process of the press unit 33 is returned to the washing water discharge chamber 12b.

Next, an example of one batch operation of the integrated residue cleaning / dewatering apparatus 10 shown in FIG. 4 will be described.

(1) The discharge valve B of the washing water discharge means 15 is closed.

(2) The water supply valve of the cleaning water supply unit 13 is opened to supply the cleaning water to the agitation cleaning chamber 12a, and water is supplied until the cleaning water reaches a predetermined water level L. In addition, even after reaching the water level L, water supply is continued without closing the water supply valve.

(3) The residue is charged from the charging port 11 into the stirring / cleaning chamber 12a.

(4) The agitator 14 is operated for a predetermined time, and after the agitation and cleaning of the residue proceeds to some extent, the driving device 36 of the screw conveyor 32 is operated. In addition, the stirring and cleaning chamber 1
Although water is always supplied to 2a, the surplus water passes through the screen 31 and overflows from the overflow weir 18 of the washing water discharge chamber 12b, so that the water level L in both chambers is kept constant.

(5) After washing with stirring for a predetermined time, the stirrer 14 is stopped. Then, the drain valve B of the washing water discharging means 15 is opened. In the illustrated example, the discharge valve B is connected to the cleaning water discharge chamber 12.
b, the washing water in the stirring washing chamber 12a must pass through the screen 31 in order to be discharged. At that time, the washed residue is reliably guided and captured on the inner peripheral surface of the screen 31.

(6) The washed residue captured by the screen 31 is conveyed by the screw conveyor 32, dehydrated by the press unit 33, and carried out of the carry-out unit 34.

(7) The water supply valve of the cleaning water supply unit 13 is closed,
The operation of the driving device 36 of the screw conveyor 32 is stopped. When the discharge from the cleaning water discharging means 15 is completed, the drain valve B of the cleaning water discharging means 15 is closed.

This one-batch operation can be performed manually as needed or regularly using a cycle timer or the like.

As an example of implementation, when to have been separated from wastewater generated from sewage treatment plants treated with residue washed dehydrator and integral shown in Figure 4 the residue 100 kg, the amount of washing water is 2m ^3, processing The time is 30 minutes, and the obtained residue is
COD content 5g / kg (dry weight), water content 60
% By weight, and the carry-out amount was 15 kg.

FIG. 6 shows a screen-type residue removing device 5 used in the second embodiment of the integrated residue cleaning / dewatering device of the present invention.
FIG. 4 is a partially cutaway schematic perspective view showing a zero. The illustration is omitted except for the screen type residue removing device.

In FIG. 6, a screen-type residue removing device 50 includes a rotary drum screen 51 that has been cleaned from sewage and separates the residue on the inner peripheral surface, and a cleaned residue that drops from the drum screen 51. Receiving hopper 52
And a screw conveyor 32 for transferring the washed residue received by the hopper 52 while dewatering the same, and a press unit 3 for compressing and dewatering the residue transferred by the screw conveyor 32.
3 and an unloading unit 34 that unloads the residue after washing and dehydration. The hopper 52 may be made of punch metal.

The drum screen 51 is formed by arranging annular wedge screen members so as to form a large number of annular gaps. Openings are formed on both sides in the axial direction of a cylindrical space formed thereby. That is, the screw conveyor 32 enters the screen 51 from one opening.
The other opening forms an opening 51a for taking the washing water into the screen 51, from which the washing water entering the screen 51 passes through the annular gap. The screw conveyor 32, the press unit 33, and the unloading unit 34
Are the same as in FIGS. 4 and 5, and the same reference numerals as those in FIGS. Hereinafter, the same members as those in the other drawings are denoted by the same reference numerals.

Screen-type residue removing apparatus 50 shown in FIG.
One batch operation of the integrated residue cleaning and dewatering apparatus of the present embodiment having the above is shown in FIG. 4 except that the rotary drum screen 51 is operated and stopped in accordance with the start and the end of cleaning and dehydration, respectively. This is the same as the one-batch operation of the integrated residue cleaning / dewatering apparatus 10 described above.

FIG. 7 shows a screen type residue removing apparatus 7 used in the third embodiment of the integrated type residue cleaning / dewatering apparatus of the present invention.
FIG. 4 is a partially cutaway schematic perspective view showing a zero. The illustration is omitted except for the screen type residue removing device.

In FIG. 7, a screen-type residue removing device 70 is a modification of the screen-type residue removing device 50 of FIG. 6, and is a fixed type drum which has been washed from sewage and separates residue on the inner peripheral surface. Screen 71 and the drum screen 7
1, a rotary rake 72 for scraping off the washed residue remaining on the inner peripheral surface of the inner ring 1, a scraper (not shown) for scraping off the washed residue removed by the rotary rake 72, and a hopper 52 for receiving the residue. A screw conveyor 32 that partially enters the hopper 52 and transports the washed residue in the hopper while dewatering the same; a press unit 33 that compresses and dewaters the residue transported by the screw conveyor 32; And a carry-out section 34 for carrying out the dewatered residue. The screen 71 has substantially the same configuration as the screen 51 of FIG. The screen type residue removing apparatus 70 corresponds to the apparatus described in FIG. 1 of JP-A-2-43908 and JP-A-3-2410.

Screen-type residue removing device 70 shown in FIG.
The batch operation of the integrated residue washing and dewatering apparatus of this embodiment having the above configuration is the same as that shown in FIG. 4 except that the rotary rake 72 is operated and stopped in accordance with the start and end of washing and dehydration, respectively. 1 of washing residue dewatering device 10
This is the same as described for the batch operation.

The integrated residue cleaning and dewatering apparatus of the present invention comprises:
(1) Conventionally used for removing and recovering sewage from sewage and incorporating screening, transportation and dehydration in a compact manner and known as a sewage removal device, it is now used as a washed and removed sewage collection and dehydration device. use,
(2) A part of the screen path of the above-mentioned residue removing apparatus and a part of the conveying path including the screw conveyor are provided in the washing water discharge chamber. Therefore, the space saving of this device is achieved.

Thus, the integrated residue cleaning and dewatering apparatus of the present invention has a simple structure, has a high cleaning effect on the residue, is extremely compact, and is inexpensive. Further, the operation of the integrated residue cleaning and dewatering apparatus of the present invention is simple.

[0044]

According to the present invention, there is provided an integrated type residue cleaning and dewatering apparatus which has a simple structure, has a high cleaning effect on residue, is extremely compact, is inexpensive, and has a simple operation. Can be.

Further, since the conventionally used sewage removing device can be integrated and used for the sewage washing and dewatering device,
The added value of the conventionally used residue removing device can be increased.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of an integrated residue cleaning and dewatering apparatus of the present invention.

FIG. 2 is a basic configuration diagram showing a modification of the integrated residue cleaning / dewatering apparatus of FIG. 1;

FIG. 3 is a basic configuration diagram showing a modification of the integrated residue cleaning / dewatering apparatus of FIG. 1;

FIG. 4 is a schematic explanatory sectional view showing a first embodiment of the integrated residue cleaning and dewatering apparatus of the present invention.

5 is a partially cutaway schematic perspective view showing a screen-type residue removing device used in the integrated residue cleaning / dewatering device of FIG. 4;

FIG. 6 is a partially cut-away schematic perspective view showing a screen-type residue removing device used in a second embodiment of the integral residue cleaning / dewatering device of the present invention.

FIG. 7 is a partially cut-away schematic perspective view showing a screen-type residue removing device used in a third embodiment of the integral residue cleaning / dewatering device of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 Integrated residue washing and dewatering device 11 Loading inlet 12 Washing tank 12a Stirring washing chamber 12b Washing water discharge chamber 13 Washing water supply unit 14 Stirrer 15 Washing water discharging means 17 Partition member 18 Overflow weir 30, 50, 70 screen type Residue removing device 31, 51, 71 Screen 31a, 51a, 71a Opening 32 Screw conveyor 33 Pressing unit 34 Unloading unit 35 Guide plate 36 Screw conveyor driving device 52 Hopper 72 Rotary rake B Drain valve L Water level

Claims (3)

[Claims] 1. A stirring and cleaning chamber having (a) a washing water supply means for washing the residue and a stirring device for stirring the washing water,
(B) a washing water discharge chamber having an overflow weir for adjusting the water level and washing water drainage means, (c) a screen for separating the residue from the washing water, and a screw conveyor for transporting the separated residue. A press unit for compressing and dewatering the conveyed residue, and a screen-type residue removing device having a discharge unit for discharging the compressed and dewatered residue, the agitation cleaning chamber and the cleaning water discharge chamber, The screen is separated by the screen-type residue removing device, and the washing water in the agitation washing chamber passes through the screen of the screen-type residue removing device and moves to the washing water discharge chamber. Washing and dewatering equipment. 2. The agitated washing chamber and the washing water discharge chamber,
2. The apparatus according to claim 1, wherein the screen is separated by a screen and a partition member of the screen-type residue removing apparatus. 3. The agitation device for agitating the agitation cleaning chamber is a mechanical agitator, a diffuser for aeration and agitation, or a cleaning water injection nozzle for injecting high-pressure cleaning water. Integral residue cleaning and dewatering device.