JPH10156107A - Dehydration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the dehydration of hydrous raw materials having diversified kinds of properties by providing this device with a dehydration vessel of double structures obtd. by partitioning the inside of a square vessel with a perforated plate and moving a pressurizing plate back and forth along the top of a base plate by the elongation and expansion of the rod of a hydraulic cylinder, thereby using to select packes made of plural kinds of meshes. SOLUTION: The hydrous raw materials are stored in a flocculation reaction vessel 2 and a flocculating agent is supplied from a flocculating agent bin 3 into a soln. refining vessel. Water is added to the agent and the agent is stirred to prepare a flocculating agent soln. The flocculating agent soln. is supplied by a fixed delivery pump to the flocculation reaction vessel 2 where the mixture is kept agitated and mixed until the flocculation reaction is completed. The hydrous raw materials subjected to the flocculation treatment are transported and packed by a supply pump 7 into a filtration pack 9 loaded in the dehydration vessel 8. After the completion of the packing of the dehydrated raw materials, the hydraulic cylinder 15 is operated to move the perforated flank plate 14 to compress the pack 9 from both sides and to start a dehydration treatment. The hydraulic cylinder 15 is stopped after the completion of the dehydration and a gate plate 10 is opened. The pack 9 is hoisted by a lift 16 and is transferred to a storage tank where cake is discharged from the pack 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial applications] In recent years, it has become an urgent task to secure a final disposal site or to dehydrate and reduce the volume of water-containing raw materials due to problems such as overloading and transportation. It is necessary to develop a technology to recycle dehydrated raw materials in order to avoid the shift to water.Since hydrated materials have various physical properties, it is impossible for one type of dehydrator to handle the dehydration of all hydrated materials. Recycling inorganic water-containing raw materials, which is required by governments and treatment companies, to develop a lightweight and low-cost portable dehydrator that can not be carried out and perform dehydration while traveling on site In general, it is an urgent task to develop a technology to recycle and increase the compressive strength of solids by secondary treatment with a solidifying agent. An economical method is to use a cement-based special solidifying agent. Although it is required to use it as a solid, existing dehydrators are Is problematic recycling for solidification strength of cement solidifying agent does not rise in many polymeric flocculant used in the agent.

For example, bentonite sludge, which is a waste of construction waste that is generated in large quantities and poses a problem of disposal, is used in a conventional dewatering machine using a porous screen to increase the dewatering effect by using a polymer-based flocculant. It is a mechanism, therefore, if the purpose is to recycle, it is more unsuitable for the above reasons, if the inorganic coagulant can be used, the cake will be changed from hydrophilic to hydrophobic at the time of dehydration if inorganic coagulant can be used. Physical properties,
Furthermore, if the secondary treatment is performed with a cement-based special solidifying material, the compressive strength required for recycling can be reproduced, and it can be recycled into a composite material of a secondary product such as a building material resource or a roadbed material. In order to solve the above problem, the present dewatering device prepares a filtration pack (hereinafter referred to as a “pack”) made of a plurality of types of mesh sheets that match the model of the device and the physical properties of the water-containing material, and checks the compatibility of the packs. It is highly adaptable to use of inorganic coagulants because it is used by holding.

[0003] The final disposal of organic sludge is often delegated to incineration. For this reason, reducing the volume of dehydration leads to a reduction in disposal costs including fuel consumption and transportation costs. The dehydrator of the present invention uses a pack. Because the compression dehydration method was used, even if the physical properties of the water-containing raw materials are diverse, it is also possible to standardize packs made of multiple types of mesh sheets by adapting to any coagulant and have compatibility, It is economical to use an inexpensive disposable filter paper pack for viscous sludge containing oil or sludge with a strong odor, because it saves washing water and labor required for regeneration.

A special vehicle such as a vacuum vehicle is used for collecting sludge accumulated in the gutters and scum accumulated in the pits. The collected sludge is transported to a factory and then dewatered.
It is the current situation that transport costs take a considerable part of the disposal costs by taking a method such as transporting directly to an incinerator and disposing of it. On the other hand, the dewatering device of the present invention is lightweight and compact. It is also suitable for a vehicle-mounted type, and it is possible to move and work while storing only the reduced dehydrated cake in a storage tank installed on the same vehicle while returning the filtrate to the original while dehydrating on site,
A dewatering apparatus characterized by solving problems such as narrow road conditions and a small working space if it is mounted on a small vehicle, and capable of easily performing on-site work which is impossible with a conventional dehydrator.

[0005]

2. Description of the Related Art Conventionally, in the method of dehydrating a water-containing raw material, a model adapted to the physical properties of the water-containing raw material and the type of coagulant is determined at the stage of designing a machine. There is no dehydrator in a form corresponding to, for example, centrifugal separation method, belt vacuum dehydration method, screw compression method, constriction pressure dehydration method and the like are known, but generally, these models generally have a processing capacity The machinery and equipment are large and do not have the dewatering capacity to handle various water-containing raw materials for the reason given in the previous term. Also, the price is expensive and the mobility is poor, so the interest of residents and related companies is strong. It is difficult to convert it to a portable dewatering machine that dewaters while circulating around the site for the foul odor of gutters and rivers or the scum treatment of harmful sludge or pits, which are the cause of environmental pollution. Not suitable for field work that is needed is to provide a dehydrating device of the present invention to solve these problems.

[0006]

SUMMARY OF THE INVENTION The dehydrator of the present invention has a structure that does not require complicated functions such as a rotating mechanism.
All except the general-purpose pump, such as the power source for dehydration, opening / closing of the gate, tilting of the lift, etc., are operated by the hydraulic cylinder method.The dehydration method adapts to water-containing raw materials and coagulants with various physical properties. A filter pack made of sheets is standardized and prepared, and a pack of a type suitable for the physical properties of the water-containing raw material and the coagulant may be selected and used from the standard pack. It is manufactured with a filter medium sheet that is compatible with various sizes of water-containing raw materials and flocculants, and a size that can be adjusted to the volume of the filter.

If the dewatered cake is easily peeled off from the pack, the pack is used repeatedly. However, sludge such as scum which has strong tackiness or has a bad smell increases the cost of washing and regenerating. It is advisable to produce and use a suitable pack, the dehydration method is a batch type, but it is also possible to treat a large volume of water-containing raw material at one time,
A dewatering device characterized in that the dewatering unit of the device is dewatered by compressing a pack filled with water-containing raw materials by a hydraulic mechanism using a pressurized perforated plate that compresses slowly from both sides.

[0008] The filter pack used in the present dewatering apparatus is dedicated to this apparatus, and is manufactured by determining the size and mesh according to the dehydration model and the physical properties of the water-containing raw material and the type of the flocculant. It is provided in the center, and has a structure in which a fastener for discharging the dehydrated cake is sewn or joined on the lower surface to a length that divides the bottom surface into two parts.

[0009]

According to the present invention, in order to achieve the above-mentioned object, a water-containing raw material sucked by a vacuum pump 1 or the like is stored in a coagulation reaction tank 2, and a solution purification tank is supplied from a coagulant bottle 3 by a quantitative feeder 4. A predetermined amount is supplied to 5 and water is added thereto, followed by stirring to produce a flocculant solution. The flocculant solution is supplied to the flocculation reaction tank 2 by a fixed amount pump 6 and stirred and mixed until the flocculation reaction is completed. The hydrated raw material is transported and filled into the filter pack 9 loaded in the dewatering tank 8 by the supply pump 7.

A hydraulic cylinder 11 is provided on the upper surface of the dewatering tank 8.
A gate plate 10 that opens and closes from the center to the left and right is provided. Inside the dewatering tub 8, a facing porous side plate 12 and a porous bottom plate 13 fixed to the dewatering tub 8 at a fixed interval from the inner surface of the dewatering tub 8; A rod of a hydraulic cylinder 15 mounted on the outer side of the dewatering tank 8 is connected through a side plate of the dewatering tank 8 and moves along the perforated bottom plate 13 according to the expansion and contraction of the rod. In the dehydration, a gate 10 is opened, the pack 9 is loaded, and the water-containing raw material supplied from the coagulation reaction tank 2 is filled. When the filling is completed, the hydraulic cylinder 15 is operated to operate the porous side. Face plate 1
By the structure 4, the water-containing raw material is compressed and dewatered from both sides of the pack 9.

In order to load the pack 9 into the dewatering tub 8, the lift having a double pipe structure is vertically raised up to the upper surface of the dewatering tub 8, refracted horizontally from that position and extended to the center of the dewatering tub 8. The inner pipe 17 of the lift 16 projects the short pipe part downward at the tip of the lift 16, mounts the hanging alloy tool 18, and mounts the hanging alloy tool 1 mounted on the water-containing raw material feeding short pipe part provided in the pack 9.
The hydraulic cylinder 20 that is remotely operated is mounted on the bending portion of the lift 16.

The lift 16 is supported by a base having a bearing 21 incorporated in a vertical lower end thereof, and a guide rope connected to a tip end of the lift 16 can be manually operated when the lift 16 is rotated. A bendable and stretchable hose is connected to the inner tube 17 of the bending section 16 and the rotating section,
The pack 9 connected to the lift 16 is charged by opening the gate plate 10 provided on the upper surface of the dewatering tank 8 and then loading the dewatering raw material. When the filling is completed, the pack 9 is automatically activated by an instruction such as the discharge pressure of the supply pump 7. Is stopped, the hydraulic cylinder 15 is operated, the porous side plate 14 is slowly moved, and the pack 9 is compressed from both sides to start the dehydration treatment. A stop valve 22 is provided.

The filtrate is transferred to the outside of the tank by a filtrate discharge pump 23 with the porous bottom plate 13 below the dewatering tank 8 as a storage part. The filtrate must be neutralized and discharged depending on the amount of PH. Sludge can be reused as dilution water. During the dewatering operation, the gate plate 10 of the dewatering tank 8 is closed to take into consideration pollution such as bad smell.
It is preferable to install a deodorization tower in the tank. When the dehydration is completed, the hydraulic cylinder 15 is stopped by an instruction from a sensor relating to the pressure of the hydraulic cylinder 15 and the like, the gate plate 10 is opened, and the pack 9 is opened.
Tank 2 which is lifted by a lift 16 and provided in close proximity
Then, the cake is discharged from the pack 9, and the discharge is performed by opening the fastener provided on the lower end surface of the pack 9 and dropping it, or by removing the connecting fitting of the pack 9 and replacing it with a new pack, and again, Automatic batch type dehydrator with a method of repeating dehydration.

The pack 9 is manufactured exclusively for the dehydrating apparatus.
The shape is cylindrical or square similar to that of a commercially available flexible container pack, and the entire structure is sewn with a mesh material or joined by another method. A flanged short pipe 25 serving as an inlet is fixed, and a hanging alloy tool 19 connected to the pack 9 is attached to the short pipe 25 with a brim. A fastener 26 having a length that divides the lower surface into two parts is attached to the center of the lower surface. When discharging the dehydrated cake from the pack 9, the fastener 9 is opened and dropped and discharged with the pack 9 connected to the lift 16, and a reinforcing band is provided on the surface of the pack 9 to withstand the weight when the dehydrated cake is lifted. 27 must be arranged in a plurality of rows and columns, and the empty pack 9 is folded in two so as to be easily loaded into the dewatering tub 8 and fixed with the magic hook 28. And out of the structure.

[0015]

According to the present invention, a pack made of a plurality of types of mesh sheets adapted to the physical properties of the water-containing raw material and the type of coagulant is standardized according to the type of the dehydrating apparatus. It is a very simple structure that compresses from both sides of the pack with a perforated plate operated by a hydraulic mechanism in the tank and dewaters the water-containing raw material.It is lightweight and compact and suitable for on-vehicle type. It is the most suitable dehydrator for working, and its features are that it is cheaper than conventional dehydrators because of the extremely simple mechanism and structure of the system, and that it is less likely to break down.

[0016]

FIG. 1 is a schematic side sectional view of one embodiment showing a dewatering step of a dewatering tank 8 according to the present invention. FIG. Tube 17
Is a schematic view in which a hanging alloy tool 18 attached to a short pipe portion projecting downward from the lift 16 and a hanging alloy tool of the pack 9 are connected and lifted up to the upper surface of the dewatering tub 8. Gate plate 1 that can be opened and closed by a hydraulic mechanism provided on the upper surface
FIG. 4C is a schematic view in which the gate plate 10 is closed with the pack 9 loaded and the gate plate 10 closed. (C) shows the rod of the hydraulic cylinder 15 which is filled with the water-containing raw material in the pack 9 and mounted on the outer face plate of the dewatering tank 8. The pack 9 is penetrated through the side plate and connected to the porous compression plate 14, and the pack 9 is compressed and dewatered from both surfaces while slowly moving on the surface of the porous bottom plate 13 by the operation of the hydraulic cylinder 15. During the dehydration, the backflow of the water-containing raw material is prevented. Is a schematic view in which a check valve 21 is provided in the inner pipe 17 and the filtrate is stored in the lower part of the dewatering tank and transferred to the outside of the tank by the discharge pump 22. (d) Opening the gate plate 10 after the dewatering is completed FIG. 4 is a schematic diagram of carrying out a filter cloth pack 9 from a dewatering tank 8.

[0017]

According to the present invention, a pack made of a plurality of types of meshes can be prepared and used properly, so that dehydration can be performed in accordance with water-containing raw materials and flocculants having various physical properties.
Basically, packs are used repeatedly.However, for sludge with strong stickiness or odor, use inexpensive paper packs to dispose of them, thereby eliminating washing water, detergent and cleaning time. Is overall cost reduction and sanitary,

Further, the dewatering apparatus of the present invention can be used, for example, to increase the flocculant in order to reproduce the solidification strength, which is the basis for solidifying inorganic hydrated sludge with a cement-based solidifying agent for recycling. There is a characteristic that the dehydration effect does not change even if it is changed from a molecular system to an inorganic system, and refiltration of the filtrate is not required.In recent years, construction sludge has become difficult to secure a disposal site, and the development of recycling has become an issue. In order to solve these problems, it is necessary to first develop a dehydrator that converts the flocculant into an inorganic type and sufficiently enhances the dehydration effect. It is characterized by its ability to handle various water-containing raw materials and the possibility of recycling.

The dewatering apparatus of the present invention is not only capable of achieving the purpose of dehydration of a water-containing raw material having poor dewatering efficiency by selecting a mesh of a pack, but also capable of performing dehydration processing while moving on site. The transport type can be installed simply by mounting it on a vehicle.Therefore, cleaning water is not required for sludge treatment of existing factories, rivers, irrigation ditches and pits where the installation area cannot be taken, and equipment cost is low and workability is low. As a result, the walking cost can be considerably reduced as compared with the conventional dehydrator.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing one embodiment of a dewatering step of a dewatering tank according to the present invention.

FIG. 2 is a side view and a plan view of the entire assembly drawing of the dewatering device according to the present invention.

FIG. 3 is a side view in which the dewatering device according to the present invention is mounted on a vehicle.

FIG. 4 is an explanatory view of a filtration pack dedicated to a dehydrating apparatus according to the present invention. (A) is the front view which folded the empty pack.
(B) is a front view in which the empty pack was folded in two and fixed with magic hooks. (C) is a schematic diagram of a side surface and a bottom surface in which a pack is filled with a water-containing raw material. (D) is an enlarged side sectional view in which a short pipe with a collar is attached to the water-containing raw material inlet of the pack.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum pump 2 Coagulation reaction tank 3 Coagulant bottle 4 Quantitative feeder 5 Coagulant solution purification tank 6 Quantitative pump 7 Water-containing raw material supply pump 8 Dehydration tank 9 Filtration pack 10 Gate plate 11 Gate opening and closing hydraulic cylinder 12 Perforated side plate 13 Porous bottom Face plate 14 Perforated compression plate 15 Compression hydraulic cylinder 16 Lift 17 Inner tube 18 Inner tube attachment hanging tool 19 Pack inlet hooking tool 20 Lift bending hydraulic cylinder 21 Lift rotation bearing 22 Check valve 23 Filtrate discharge pump 24 Cake holding Tank 25 Short pipe with brim 26 Fastener 27 Reinforcement band 28 Magic hook

Claims (3)

[Claims] 1. A double-layer dewatering tank in which a rectangular container provided with a gate plate that opens and closes the upper surface to the right and left is separated by a perforated plate at a predetermined interval, and the facing side plate and the bottom plate of the partition plate are The pressure plate fixed to the dehydration tub and the remaining facing side plate is connected to the rod of the hydraulic cylinder mounted on the outer plate of the dehydration tub through the side plate, and reciprocates along the bottom plate by the expansion and contraction of the rod. A batch-type dewatering apparatus, wherein the pressurizing plate dewaters the water-containing raw material filled in the filter pack loaded in the dewatering tank by slowly compressing it from both sides by operating a hydraulic cylinder. 2. A double-tube lift in which the water-containing raw material treated with the coagulant rises vertically to the upper side of the dewatering tub, tilts horizontally by a hydraulic mechanism, and extends the tip end to the center of the dewatering tub. Attach the hanging alloy tool to the short pipe part protruding downward at the tip of the inner pipe, connect it to the hanging alloy tool of the filter cloth pack, and operate the lift to attach the inner pipe of the lift to the filter pack loaded in the dehydration tank by the lift operation. The dehydration tank is closed by a hydraulic mechanism during the dehydration operation, opened when the dehydration is completed, and the dewatered cake is packed by the lift. A batch type dewatering apparatus characterized in that the above series of operations are carried out compactly by an automatic control system. 3. The filter pack is in the form of a flexible container pack.
It is cylindrical or rectangular and made of filter sheet. At the center of the upper surface, a short pipe with a brim fitted with a hanging alloy is fixed and used as an inlet for water-containing raw material. Attach a fastener to discharge the water, open the fastener while being suspended by a lift, and drop and discharge the dehydrated cake.
The capacity of cubic rice is appropriate and the size is determined according to the type of dewatering equipment.The filtration pack is to standardize multiple types of mesh sheets made of mesh sheets corresponding to the physical properties of various water-containing raw materials to have compatibility A filtration pack exclusively for a dehydrator according to the present invention.