JP2000015294A - Regeneration treatment for recycling industrial waste and production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct solid-liquid separation efficiently and to produce a large amount of dewatered cake at a time by a method in which a recessed filter plate is covered with a filter cloth, it is connected horizontally and fastened by a hydraulic mechanism, sludge is injected directly on the filter plate by forcible feeding, the filtrate, after being subjected to pH treatment, is used as recycled water, and the dewatered cake is used as reclaimed soil. SOLUTION: A square, recessed steel filter plate 7 covered with a filter cloth is connected many times, suspended by a special suspending apparatus 8, and fixed. The central part of the filter plate 7 is fastened by a hydraulic mechanism. Sludge is injected through a sludge placing valve 1 and fed forcibly by an air pump. Filtrate which passed through the filter cloth is discharged outside through the channel hole of punching metal formed in the filter plate 7, and after being subjected to pH treatment, is used as recycled water. Dewatered cake 9 after solid-liquid separation can be used as a soil solidification material and an embankment and also can be recycled as an organic potassium phosphate fertilizer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0101]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dewatering device for forcibly pumping directly to a filter plate by a pressurizing motor to separate sludge from solid and liquid, and to recycle a solidified solid (a dehydrated cake) as a reclaimed soil. To a manufacturing method.

[0092]

2. Description of the Related Art A conventional dewatering device compresses sludge stored in a box of a fixed capacity by a filter press, and the treatment time is greatly affected by the concentration of sludge, resulting in a very low efficiency.

[0093]

In the conventional dewatering apparatus, not only does the treatment time fluctuate until compaction (dewatering cake) occurs depending on the concentration of sludge, but its elementary particles are very small like bentonite-based sludge. Fine materials have problems that not only cannot sufficient dewatering treatment be performed, but also that processing performance per hour is inferior.

[0093]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a method of forcibly pumping and directly concentrating directly on a filter plate, adding sludge water of ready-mixed concrete thereto, and efficiently performing solid-liquid separation. A large amount of dewatered cake can be made in a short period of time, and the addition of sludge water from ready-mixed concrete increases the setting effect and can be effectively used as reclaimed soil as a soil solidifying material and backfill soil.

[0056]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to an air pump for connecting a plurality of rectangular concave filter plates made of a steel plate, suspending them with a special suspension device, and tightening the center of the filter plates with a hydraulic mechanism to forcibly feed sludge. Is attached.

The sludge pumped into the filter chamber is filtered and accumulated by the filter cloth to form scale, and the filtrate passing through the filter cloth passes through the slot of the punching metal cut in the filter plate to the outside. After discharge and PH treatment, it is used as reclaimed water.

The dewatering device constructed as described above is very efficient due to the special mechanism of the filter plate, and the time required for one cycle is greatly reduced. Uniform and large-scale dehydration can be performed without variation in solidification of the form of the scale (dewatered cake), and high-quality regenerated water can be obtained.

Embodiments will be described with reference to the drawings.
In FIG. 1, the filter plate (7) of the dehydrator is fixed by a special suspension device (8). Sludge is inserted through the sludge driving valve (1) and is forcibly pumped by an air pump (6) to be compressed and solidified. As a result, the dewatered cake and the filtrate are separated and effectively used as reclaimed soil and reclaimed water, respectively.

In the embodiment shown in FIG. 2, a filter cloth is attached to the concave portion of the filter plate, and the state of the punching metal cut into the filter plate is shown.

[0099]

The present invention is embodied in the form described above and has the following effects.

[0010] By forcibly pumping the sludge directly to the concavely concave filter plate, a large amount of dewatered cake can be made at a time, and there is no variation in the dewatering time depending on the type of sludge, and the dewatering process can be performed efficiently. Can do well.

[0011] By adding the sludge water of the ready-mixed concrete, the coagulation effect is improved and the bentonite-based sludge can be efficiently separated into solid and liquid.

Further, the dewatered cake separated into solid and liquid can be used as a soil solidifying material and an embankment as a reclaimed soil.
By crushing pork bones, beef bones, etc. and mixing them with these organic substances, it can be recycled as an organic potassium phosphate fertilizer.

By adopting the above-mentioned dewatering method in which sludge is directly inserted into the concave filter plate and forcedly fed, solid-liquid separation is facilitated and a uniform dewatered cake can always be produced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a concave filter plate.

FIG. 2 is a detailed development view of a concave filter plate.

FIG. 3 is a cross-sectional view showing an embodiment of a concave filter plate.

FIG. 4 is an overall development view of the dewatering device.

FIG. 5 is a system diagram of an embodiment of a dewatering treatment of construction sludge.

[Explanation of symbols]

 1. Sludge driving pipe 2. Sludge tank 3. Filter cloth 4. Bunching metal 5. Hydraulic cylinder 6. Air blow pipe 7. Filter plate 8. Hanging device 9. Dehydrated cake

Claims (1)

[Claims] 1. A filter cloth (7) (3) on a concavely concave filter plate.
The sludge (2) is forcibly injected directly into the filter plate by air pressure and tightened with a hydraulic mechanism (6), and the filtrate passed through the filter cloth is subjected to PH treatment and then used as reclaimed water for compression and solidification. A dewatering device that recycles the recycled solid (dewatered cake) (9) as recycled soil and recycles industrial waste.