JPH07313996A - Sludge regenerating, utilizing and purifying total apparatus - Google Patents

Abstract

PURPOSE:To simultaneously perform dredging and the purification of water by connecting a dredging pump and a large-sized refuse removing filter to a sludge water separator and arranging a large number of tanks in the separator and arranging a storage tank, a return pump and a continuous kneader to the outside of the separator. CONSTITUTION:Sludge water drawn into a dredging pump 1 and treated with a large-sized refuse removing filter 2 is sent to the first tank 5 of a sludge water separator 4 and a flocculation/sedimentation agent is charged in the first tank 5 from a drug injector 6 to separate the sludge water into water and sludge. Supernatant water is drained as fresh water while the settled sludge is drawn out of a large number of emitting orifices 8a-8d to be sent to the earth and sand decanter 17 and sludge decanter 22 of a centrifugal separator. Thereafter, the dehydrated and squeezed sludge water is introduced into a plurality of storage tanks 19a, 19b and returned to the first tank 5 by a plurality of return pumps 21a, 21b. The dehydrated sludge is fed to a continuous kneader 24 to be kneaded with the solidifying agent charged from a silo 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge recycling and purification total system for simultaneously performing dredging and water quality purification on lakes, ponds, moats, swamps, rivers, ports and the like.

[0002]

2. Description of the Related Art Conventionally, lakes, ponds, etc. have been used as target areas for dredging.
There are moats, swamps, rivers and ports. These sludges have an inorganic (soil-like) part and a fluffy organic part in the upper part of the lake bottom. The inorganic part is processed by excavating it with a dredging machine such as a backhoe, but water pollution The current situation is that the organic matter layer, which is considered to be the origin of the above, is not excavated, only diffused, and no fundamental treatment is performed. Furthermore, there is an idea that dredging work and water purification are different. Since the target area to be dredged is different from the environmental conditions such as lakes, ponds, moats, swamps, rivers, and harbors, dredging work and water purification that meet all these conditions can be done at a low cost at the same time. There was no way.

[0003]

As a conventional sludge recycling and purification method, there has been the idea that it is unavoidable that suspended matter such as organic matter contaminates the water quality during dredging work. The problem to be solved by the present invention enables improvement of current water quality and dredging of sludge, reuse of sludge, water quality maintenance after dredging, dredging / purification / sludge early treatment, significant reduction of total cost, and shortening of construction period. It is to provide what to do.

[0004]

[Means for Solving the Problems] In order to contribute to the global environment, is there a significant social significance in consideration of the environment, purification, recycling, recycling, low ecology, construction cost reduction, safety, etc.? This inventor thought that. Then, I wondered if I could use the total technology that was a compilation of the existing technologies. The inventor has made various prototypes of this system based on such an idea.
Then, a system for continuously performing dredging work, purification of water quality and reuse of sludge in one process was conceived, and the present invention could be completed.

Means for solving the above-mentioned problems will be described. FIG. 1 shows a sludge recycling and purification total system according to the present invention. The present invention is as follows. That is, the dredging pump 1 is joined to the large dust removing filter 2. Then, the discharge part 3 of the large dust removing filter 2 is joined to the sludge water separation device 4. A drag injector 6 and a stirring device 7a are provided above the first tank 5 of the sludge water separation device 4, a discharge port 8a is provided at the bottom of the first tank 5, and a lower portion is provided between the first tank 5 and the second tank 9. A partition plate 10a having an opening is provided. Then, the stirring device 7 is placed in the second tank 9.
b, and a partition plate 10b having an upper opening between the second tank 9 and the third tank 11, and the stirring device 7c in the third tank 11.
And discharge ports 8b and 8c are provided at the bottom of the third tank 11, a partition plate 10c having a lower opening is provided between the third tank 11 and the fourth tank 12, and a discharge port 8d is provided at the bottom of the fourth tank 12. , Fourth tank 1
A filter 13 and an overflow portion 14 are provided on the upper part of 2, and a fresh water drain port 15 is provided at the tip of the overflow portion 14.

[0006] A sludge transfer device 16 interlocking from the first tank 5 to the fourth tank 12 is provided, the discharge ports 8a and 8b are joined to the sediment decanter 17, and the sludge decanter 17 is connected to the sludge outlet 18a.
And a water storage tank 19a are provided, the sludge take-out port 18a is joined to the transfer device 20, and the return pump 2 is connected to the water storage tank 19a.
1a is provided, and the return pump 21a is connected to the sludge water separation device 4
To the upper first tank 5 of the above. The discharge parts 8c and 8d of the sludge water separation device 4 are joined to the sludge decanter 22, the sludge decanter 22 is provided with a sludge outlet 18b and a water storage tank 19b, and the sludge outlet 18b is joined to the transfer device 20. A return pump 21b is provided in the water storage tank 19b, and the return pump 21b is joined to the upper part of the upper first tank 5 of the sludge water separator 4. A continuous kneading machine 24 is provided at the discharge port 23 of the carrier device 20.
The solidifying agent silo 25 and the charging amount adjusting device 26 are joined to the continuous kneading machine 24 by the solidifying agent conveying device 27, and the conveying device 28 is provided in the continuous kneading machine 24. The stirring devices 7a, 7b and 7c are the stirring blades 29 and the pipes 30 of the magnetizing air stirring device. Further, the sludge transfer device 16 is a screw conveyor. Further, the conveying device 21 is a screw conveyor.

[0007]

The present invention is based on the block diagram of FIG.
The treatment process of sludge water will be described. In the figure, sludge and sludge water are sucked into a dredging pump 1, and sludge water 31 treated by a large-scale dust removal filter 2 for the purpose of removing dust is sent to a first tank 5 of a sludge water 31 separation device 4, where it is a coagulating sedimentation agent. Is introduced by a drag injector 6 to be coagulated and settled in the sludge water separator 4 to separate into water and sludge. Then, the clean water becomes clean water 32 and is drained. The sludge settled down is extracted from the discharge ports 8a, 8b, 8c, 8d and sent to the sediment decanter 17 and the sludge decanter 22 of the centrifugal separator. Then, the sludge water 31 that has been dehydrated and squeezed out enters the water storage tanks 19a and 19b, and is returned to the first tank 5 of the sludge water separation device 4 by the return pumps 21a and 21b. The dehydrated sludge is conveyed to the continuous kneader 24 by the screw conveyor 20. Therefore, the solidifying agent whose amount has been adjusted by the amount adjusting device 27 from the solidifying agent silo 26 is conveyed to the continuous kneading machine 24, where
The sludge and the solidifying agent are kneaded and immediately discharged in the state of reusable soil 33 that can be carried out.

[0008]

Example 1 This sludge recycling and purification total system is used as follows. That is, the dredging pump 1 is put in a lake, a pond, a moat, a swamp, a river, a harbor, etc. in which the sludge water 31 is accumulated. The sludge water 31 is mainly composed of the fluffy organic matter in the upper layer of the lake bottom, which causes the water pollution.
Inhale with Gravel, wood chips, dust, etc. contained in the sludge water 31 are separated into only the sludge water 31 by the large-sized dust removing filter 2, and the sludge water 31 is sent to the first tank 5 of the sludge separation device 4 at the same time. The coagulant is added while adjusting the input amount from the drag injector 6. At this time, the aggregating agent mixes with the sludge water 31 while being mixed, and the stirring blade 29 is swiftly rotated for the purpose of promoting the stirring, whereby the stirring is promoted. Then, they flow into the second tank 9 through the opening below the partition plate 10a of the first tank 5. Further, the purpose of the second tank 9 is to further accelerate the chemical reaction of the flocculant by further stirring the flocculant and the sludge water 31 from the first tank 5, so that the suspended matter in the sludge water 31 becomes a floc. Is formed. In order to further make it into a large and stable floc, it is agitated by the agitating blade 29 at a proper, medium speed rotation. In addition, magnetized air is sent from the magnetized air generator 30 through a pipe in order to assist it, improve water quality, and add a function of increasing dissolved oxygen in water. As a result, the sludge water 31 overflowing the partition plate 10b from the second tank 9 and the flocculant are sufficiently stirred and flow into the third tank 11. And, in the third tank 11, two slightly larger stirring blades 29 are provided,
It rotates at a fairly slow rotation speed of about 9 revolutions per minute. The third tank 11 is a tank for sedimenting flocs of sludge, and suspended solids in water settle at the bottom of the tank. What settled down due to the rotation of the screw conveyor 16 at the bottom thereof flows, and the discharge ports 8b, 8c
The suspended solids in the water are more likely to settle because they are pulled out from. Therefore, the sludge water 31 flows continuously.
The partition plate 1 provided between the third tank 11 and the fourth tank 12
Water and a small amount of flocs separated by the coagulant flow into the fourth tank 12 through the opening at the bottom of 0c. In the lower part of the fourth tank 12, the flocs are pulled out from the discharge port 8d. Further, the cleaned water passes through the filter 13 provided on the entire upper portion of the fourth tank 12 and flows out. And this water is 32
And then return to the original dredging site. And the first tank 5
The sludge with a large specific gravity and a large amount of mud is mainly drawn out from the discharge port 8a. And this sludge and the discharge port 8 of the third tank 11
The sludge from b and 8c together flows into the decanter 17 for earth and sand.

Discharge ports 8c, 8 of the third tank 11 and the fourth tank 12
From d, sludge with a light specific gravity is mainly extracted, and these together flow into the sludge decanter. The earth and sand decanter 17 has a larger processing capacity than the sludge decanter 22. Then, the sludge having a water content of about 90% to 100% is dehydrated from the sludge by the centrifugal separator built in the decanter 17 for sediment and the decanter 22 for sludge.
The kneading machine 2 at one place is carried by the screw conveyor of the carrying device 20 from the outlets 18a and 18b of each decanter.
Collected in 4. The kneaded material from the silo containing the solidifying agent while adjusting the input amount is directly loaded onto the belt conveyor, the transportation vehicle, etc. as the transportation device 25, and recycled in various directions as the recycled soil 33. Used. The sludge water 31 that has been dehydrated by the decanter centrifuge and squeezed out is fed back to the first tank 5 of the sludge separation device 4 from the water storage tank joined to each decanter via the return pop. . This sludge water 31
Since it is already sewage that has cohesive power, the amount of coagulant added will be efficient each time it is circulated.

[0010]

[Experimental Example 1] Test location Sand sampling site at the site of Tokai Urban Development Co., Ltd. Shitoro Town, Hamamatsu City, Shizuoka Prefecture Test date July 29, 1993 (Thursday) 10:30 am-
12:00 Weather Observing the sludge using a suction device and confirming the flocculating effect of the flocculating sedimentation agent The flocculant on the bottom of the lake is fed with a flocculating agent through the suction port on the pump ship, and stirred during transportation to Trommel. Flocs are settled in the sand basin and tap water is discharged from the discharge pipe, and the situation is observed. Inflow rate from pump ship 17 m ³ / min Flocculant input rate (a) 360 g / min (0.0021
%) (B) 1200 g / min (0.0070%) (c) 1920 g / min (0.0110%) (Situation) (A) Scouring occurs at the falling point of the sand sampling pond and the effect of coagulation separation (sedimentation) Was blocked. (B) Since the settling tank has a simple structure and the length of downflow is short, flocs do not settle. (C) Although the coagulant was charged from the suction port on the pump ship, the coagulant was too small to supply a sufficient amount, and the coagulant was also supplied from the opening of the trommel. (D) Since the settling tank is small and the water depth is shallow with respect to the inflow rate (17 m ³ / min) from the top of the pump ship, the floc settling space cannot be secured. (E) A protective net for painting was used as a filter facility, but the filter effect was not sufficient. (F) The coagulation reaction is completed in the first settling tank even when the coagulant is added from Trommel. (Flock is formed.) From the above experimental results, the following problems were created. . (B) Install a settling tank that matches the inflow rate. (B) Understand various conditions such as floc sedimentation speed, water depth, coagulant mixing ratio, floc formation status, and specific gravity. (C) Examine the filter device. (D) Floc solidification experiment (mixing ratio of solidifying agent by water absorption hydration reaction, uniaxial compressive strength test, PH value, etc.) As described above, the basic experiment on the first day was started on July 29, 1993, The machine as a system was completed on November 5, 1993 by repeating the trial-and-error improvement and devising the position of the shielding plate, the shape, the stirring method of the coagulant and mud, the position of pulling out the sludge, and the number of sludge. However, the experiment and the establishment of technology by moving the whole system according to the flow chart diagram began on November 5, 1993.
This system is for practically expressing the basic principles of the new sludge recycling and purification system and the sewage (wastewater) treatment system. The entire system is installed in a 4t vehicle to play the role of the demonstration. I made it into a type that can be moved and tested anywhere.

[0011]

[Experimental Example 2] Test location Shitoro Tokai Urban Development Co., Ltd., Hamamatsu City, Shizuoka Prefecture Sand sampling site on-site Test date: April 15, 1994 (Friday) AM 10:00 to PM 15:30 continuous operation. Weather Observing raw and treated water data for continuous operation and purification. Data such as the mud content, the amount of coagulant-sedimentation agent added, and the amount of solidification agent added by the hydration reaction are collected. Test method The following results were obtained by pumping the organic mud containing nitrogen and phosphorus after collecting sand from the site of the eel pond and passing it through this system. Test result Flow rate from pump 300 l / min
Amount of coagulant 30 g / min (in the beaker test, coagulant 30 g-
It was effective with an input amount of 50 g.) It was constructed with a mud content of 5% to 9%. Centrifuge After dehydration, the water content was 90% to 100%. Amount of solidifying agent used to make it a corn index that can be carried out Approximately 30% of the sludge weight ratio (In the beaker test, an amount of 20% is effective for 100% water content sludge) Solidifying agent by hydration reaction The raw material of PS is made of PS ash (paper sludge). PS ash is made by completely making paper from pulp originally produced from the soil, burning the drawn dust, and completely oxidizing it. Then, by putting a solidification reaction accelerator therein and stirring it as a solidifying agent, it can be adjusted by combining the type and blending of solidifying agents according to the purpose of recycling sludge. . When strength is required, it creates strength close to that of concrete and creates a shape similar to dry (aggregated) soil, and when breeding is required, it absorbs the odor of sludge when it is desired to use neutral residual soil. However, it is possible to carry out immediately. In addition, it is characterized by early strength, and even in soft ground where the backhoe etc. is set and sinks, the solidifying agent is diffused locally, and it is agitated by a machine such as a bucket stabilizer, and the agitation is completed. Therefore, the backhoe can carry on it by itself. In addition, it is considered that the sludge and the solidifying agent can be used as a base material (aggregate) for a roadbed by mixing the agitated material with the coarse soil. For the above reasons, it is called a sludge recycling total system. The following is the result of water quality inspection. Water quality inspection sheet <Analysis: Shizuoka Industrial Environment Center Environmental measurer: Fukuichi Ohnami> Before treatment After treatment Before processing After treatment

[0012]

[Experimental Example 3] Test location Shitoro Yogi pond, Hamamatsu City, Shizuoka Prefecture Test date October 16, 1993 Weather Clear Water Quality Survey Form <Analysis: Shizuoka Industrial Environment Center Environmental Weigher: Fukuichi Ohnami> Before processing After treatment

[0013]

[Experimental Example 4] Test location Shimada City, Shizuoka Prefecture Tokai Pulp Test day August 24, 1993 Weather Clear Water quality survey form <Analysis: Shizuoka Industrial Environment Center Environmental Measurer: Fukuichi Ohnami> Before processing After treatment

[0014]

【The invention's effect】

(B) No pollution. (B) Does not affect the ecosystem. (C) There is a processing capacity suitable for the purpose. (D) The total construction cost can be reduced compared to the conventional method. (E) The construction period can be shortened compared to the conventional method. (F) Do not disturb the surroundings by smell, noise, dirt, traffic congestion, vibration, etc. (G) It can be done in a smaller space than conventional methods. (H) Any location can be set. (I) Water pollution and pollution can be easily dealt with by changing the scale of the system. (G) By recycling sludge substances, it can be used as a soil conditioner and as an environmental protection substance. (L) Sludge disposal costs and disposal sites are unnecessary. Therefore, a small space is sufficient. (E) Transportation costs are reduced. (W) The number of loading and unloading operations can be reduced. (Vi) The construction cost can be significantly reduced when both dredging and purification are performed at the same time. (Ta) Does not pollute the road because sludge does not have to be carried. Furthermore, the road does not become congested because no dump is needed.

[0015]

[Brief description of drawings]

FIG. 1 is a flowchart showing a first embodiment.

FIG. 2 is a block diagram showing a first embodiment.

[Explanation of symbols]

 1 Dredging Pump 2 Large Dust Removal Filter 3 Discharge Unit 4 Sludge Separator 5 First Tank 6 Drag Injector 7a Stirrer 7b Stirrer 7c Stirrer 8a Discharge Port 8b Discharge Port 8c Discharge Port 8d Discharge Port 9 Second Tank 10a Partition Plate 10b Partition plate 10c Partition plate 11 Third tank 12 Fourth tank 13 Filter 14 Overflow part 15 Fresh water drainage port 16 Sludge transfer device 17 Sediment decanter 18a Sludge discharge port 18b Sludge discharge port 19a Water storage tank 19b Water storage tank 20 transfer device 21a Return pump 21b Return pump 22 Sludge decanter 23 Discharge port 24 Continuous kneader 25 Solidifying agent transport device 26 Solidifying agent silo 27 Input amount adjusting device 28 Transport device 29 Stirring blade 30 Magnetic air generator 31 Sludge water 32 Clean water 33 Recycled soil

Claims (4)

[Claims] 1. A dredging pump (1) is joined to a large-sized dust removing filter (2), and the large-sized dust removing filter (2) is joined.
The discharge part (3) of (1) is connected to the sludge water separation device (4), and the drag injector (6) and the stirring device (7a) are provided above the first tank (5) of the sludge water separation device (4), A discharge port (8a) is provided at the bottom of the first tank (5), and the first tank (5)
(10a) with a lower opening between the second tank (9) and
A stirrer (7b) is provided in the second tank (9), and a partition plate (10b) having an open top is provided between the second tank (9) and the third tank (11). A stirring device (7c) in the third tank (11) and a discharge port (8b) in the bottom of the third tank (11);
(8c) is provided, a partition plate (10c) having a lower opening is provided between the third tank (11) and the fourth tank (12), and a discharge port (8d) is provided at the bottom of the fourth tank (12). And the fourth tank (1
A filter (13) and an overflow section (14) are provided on the upper part of 2), a fresh water drainage port (15) is provided at the tip of the overflow section (14), and the first tank (5) to the fourth tank (12) are provided. A sludge transfer device (16) interlocking with the above is provided, and the discharge ports (8a), (8b) are joined to the sediment decanter (17), and the sludge removal port (18) is connected to the sediment decanter (17).
a) and a water storage tank (19a) are provided, and the sludge outlet (1
8a) is spliced to the transfer device (20), and the water storage tank (1
9a) is provided with a return pump (21a), the return pump (21a) is connected to the upper first tank (5) of the sludge water separator (4), and the discharge parts (8c) and (8d) are connected. The sludge decanter (22) is connected to the sludge decanter (22) and the water storage tank (19).
b) is provided, and the sludge removal port (18b) is connected to the transfer device (2
0), a return pump (21b) is provided in the water storage tank (19b), and the return pump (21b) is connected to the upper part of the first tank (5) of the sludge water separator (4), A continuous kneader (2) is attached to the discharge port (23) of the transfer device (20).
4) is provided, the solidifying agent conveying device (25) is joined to the continuous kneader (24), and the solidifying agent silo (26) and the charging amount adjusting device (27) interlocking with the solidifying agent conveying device (25). A sludge recycling and purification total system comprising a continuous kneading machine (24) and a carrying device (28). 2. Stirring devices (7a), (7b), (7c)
The sludge recycling and purification total system according to claim 1, wherein the stirring blade is a stirring blade. 3. The magnetizing air stirring generator (30) is used as the stirring device (7b).
Total system for sludge recycling and purification. 4. A sludge transfer device (16) and a transfer device (2)
The sludge recycling and purification total system according to claim 1, 2 or 3, wherein 0) is a screw conveyor.