JPH1176990A - Convertion of water-containing particulate to resource and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device by which an earth.sludge.slime.ash. dehydrated cake in which water-containing particulates having less than 75 μm grain size are present is granulated and solidified in several minutes while remaining water without dehydrating to convert into and regenerate as stable and homogeneous resources therefrom. SOLUTION: A hopper 2, a vibrating screen feeder 3 and a shaftless screw conveyor 4 are provided in a unit frame 1. A starting material is charged into a mixing granulating machine 5, the starting material is kneaded by an optional rotation to be granulated. Charging of an additive is controlled previously with a control panel 14 so that the additive may be blended in accordance with a starting material inputted to the mixing granulating machine provided with a measuring instrument 8. In the mixing granulating machine, the starting material and the additive are kneaded and granulated mixingly by the rotation of a mixing granulating blade 6 and the granulated material is discharged to a product shoot 17 by opening an outlet door after obtaining the chemical effect of a prescribed additive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for containing water, granulating, solidifying, and recycling resources of soil, sludge, sludge, ash, and dehydrated cake in which water-containing fine particles having a particle diameter of less than 75 microns exist. Things. Regarding technology, it is possible to easily recycle water-containing fine particles that have different properties at each discharge location, are unstable in nature, have problems in environmental conservation, and are difficult to reuse, according to the application and purpose. did. As a field of application, soil containing water-containing fine particles with a particle size of less than 75 microns
There are construction works, sewage water treatment, incineration plants, mechanical chemical plants, ready-mixed concrete plants, quarrying industries, and foundry plants that discharge a large amount of sludge, sludge, incineration residue, and dewatered cake. The fields of use of recycled resources cover a wide range of applications, such as backfill materials, roadbed materials, desert greening maintenance materials, horticultural materials, fertilizers, sand substitutes, and ground improvement materials.

[0002]

2. Description of the Related Art Conventionally, the treatment of water-containing fine particles is performed using physical techniques such as draining, solar drying, load consolidation dehydration, mechanical dehydration, and mixing of high-quality soil, and chemical techniques based on cement and lime. And was disposed of at a managed landfill site as difficult to recycle.

[0003]

The particle size generated in large quantities 7
Most of the soil, sludge, sludge, ash, and dewatered cake containing water-containing fine particles of less than 5 microns are transported to the landfill for disposal as waste that is difficult to recycle, and landfilled. With the shortening of the remaining years, the destruction of the natural environment due to illegal dumping of waste has progressed, and this has become a major social problem. Most of soil, sludge, sludge, ash, and dewatered cakes containing water-containing fine particles with a particle diameter of less than 75 microns are unstable, and the properties change depending on the treatment method at each discharge site. In the method, it is difficult to become a resource maintaining stable and uniform quality performance, and it is difficult to reuse the resource. Conventional physical technology and chemical technology processing methods generally only allow each process to be performed independently of each other, perform processing for each process at a plurality of locations, and complete each process in order. This is not a recycling process, but a disposal process. Particle size 75
Most of the soil, sludge, sludge, ash, and dewatered cakes containing submicron water-containing fine particles are used for landfill disposal, with the aim of fulfilling the landfill standard (less than 85% water content) for waste transport to a managed final disposal site. That is the current situation. In recent years, technologies for recycling resources by firing and melting have been developed.
It consumes a huge amount of energy, is difficult to mass-produce as a recyclable material, has problems in terms of environmental conservation quality, increases costs, and has not yet secured economic benefits.
For this reason, soil, sludge, sludge, ash, and dehydrated cake in which water-containing fine particles having an unstable particle size of less than 75 microns are present are regarded as raw materials that can be stably maintained for quality according to the purpose of reuse. There is a keen need for the rapid development of recycling technologies. The present invention has been made to solve these problems.

[0004]

Means for Solving the Problems Unit frame (1)
Inside, a hopper (2) and a vibrating screen feeder (3) are provided, and a shaftless screw conveyor (4) is provided at the lower end. The soil, sludge, sludge, ash, and dewatered cake in which water-containing fine particles having a particle size of less than 75 microns exist are fed into a mixing granulator (5) with a measuring device (8) by a shaftless screw conveyor (4). In the mixing granulator (5) with the measuring device (8), the mixing granulator (6) is arranged at the bottom and connected to the motor (7) with the inverter,
The raw materials are mixed and granulated at an arbitrary rotation. A raw material discharge port is provided in the bottom plate portion of the mixing granulator, and a discharge port door (9) is attached so that it can be closed or opened by a discharge port cylinder (10). A flexible shaftless screw conveyor (12) for supplying an additive from an additive tank (13) to an additive measuring bin (11) is provided. The addition of the additives is performed in conjunction with the batch processing of the mixing granulator (5) with the measuring device (8). The additive amount is controlled in advance by the control panel (14) so as to be blended and designed with an arbitrary proportional value and automatically set to the raw material amount to the mixing granulator (5) with the measuring device (8). The additive is fed from the additive tank (13) to the additive measuring bin (11) by a flexible shaftless screw conveyor (12) until the mixing design input amount is reached.
The motor with the inverter (15) is automatically stopped when a predetermined mixing design input amount is reached. After weighing the prescribed formulation design input, the additive weighing bin (11) is placed in the additive gate (1).
6) is released, and the additive is charged into the mixing granulator (5).
The mixing granulator (5) kneads the raw material and the additive by rotating the mixing granulation wing (6) to mix and granulate, and obtains the chemical effect of the predetermined additive. 9) is opened and discharged to the product chute (17). Control panel (11) Power panel (1
8) is provided so that a series of processing steps can be automatically controlled and can also be controlled manually. Each of these mechanical devices is accommodated and installed in the unit frame (1), and can be moved and installed as a unit. The present invention is a sludge recycling method and a recycling apparatus configured as described above.

[0005]

When the present invention is used, the raw material to the granulating and mixing machine (5) with the measuring device (8) is used as the raw material for the soil, sludge, sludge, ash, and dehydrated cake in which the water-containing fine particles having a particle size of less than 75 microns exist. Input and discharge are performed by batch operation or continuous operation. For the additive, the mixing design with the raw material is set in the control unit in advance, and the additive is metered in the additive measuring bin (11), and the additive is controlled and supplied so as to have a predetermined amount. In conjunction with the operation of the granulator (5), the mixing granulator (5)
To be supplied at any time. The mixing granulator (6) attached to the bottom of the mixing granulator (5) allows the rotation speed of the mixing granulation blade (6) to be controlled at a variable speed by a motor (7) with an inverter, thereby re-controlling the rotation speed of the mixing granulator (6). The number of revolutions is controlled according to the purpose of recycling. A plurality of mixing granulation wings (18) are attached, each of which is bent at a different angle in the rotation direction, so that the raw materials and additives are kneaded in various directions when rotating in the mixing granulator. can do. Mixing and granulating soil, sludge, sludge, ash, and dewatered cake containing water-containing fine particles having a particle size of less than 75 microns using a superabsorbent polymer and a hardening accelerator in combination enables the use of water without using a conventional dehydrator. The fine particles having a particle size of less than 75 microns containing water are granulated and solidified with water, and the particles are granulated and solidified into particles having a particle size of 75 microns or more. It can be grown into granular sand that can be used as the above resources. Since the number of revolutions of the mixed granulation blade (6) can be set freely,
Appropriate conditions can be set according to the properties of soil, sludge, sludge, ash, and dehydrated cake in which water-containing fine particles having a diameter of less than micron exist. Raw materials are charged in advance to the mixing granulator (5),
Kneading with a mixing granulation wing (6), taking in fine particles of less than 75 microns and residual moisture with a superabsorbent polymer, efficiently reducing the apparent water absorption, and adding a curing accelerator in a few minutes The raw material can be recycled and solidified by granulation with water. By using a pigment and a solidifying agent as additives, it can be recycled as a high-value-added product of various colors, and can be used as colorful sand in bunker sands and parks of golf courses. Various additives such as fibrous binders such as antibacterial agents and herbicides can be added to the additives, and soil, sludge, sludge, ash, and dehydrated cake containing water-containing fine particles with a particle size of less than 75 microns can be mixed. As a raw material for recycled resources, new applications can be developed.

[0006]

Embodiments of the present invention will be described below. A hopper (2) in which 0.6 cubic meter of raw material is placed in a unit frame (1) and an inclination angle 5 that can separate 20 mm over
A vibrating screen feeder (3) is provided, and the raw material is charged with a backhoe. Inclination angle 15 at bottom of hopper (2)
The shaftless screw conveyor (4) is arranged, and the shaftless screw conveyor motor with an inverter (19) is operated at 33 revolutions per minute to convey the raw material while containing water, and the 2 ton measuring device (8) Appendix 1.
Charge into a 5 cubic meter capacity mixing granulator (5). A mixing granulation wing (6) is provided at the bottom of a 1.5 cubic meter mixing granulator (5) with a 2 ton measuring device (8), and the mixing granulation wing (18) is rotated halfway in the length direction. Different angles θ1 = 15 °, θ2 = 30 °, θ3 = 4
It is bent at 5mm and attached to the mixed granulation wing (6). The mixing granulation blade (6) is connected to a motor (7) with an inverter, and kneads the raw material at 15 to 50 rotations per minute to mix and granulate. Raw material outlet (9) in the bottom of the mixing granulator
And a discharge door, and a discharge door cylinder (1
In 0), it can be closed or released in three to five stages. 1 cubic meter additive tank (1
3) Flexible shaftless conveyor (1) to supply additive to 200kg additive weighing bin (11)
2) is provided, and the conveyor is operated and driven by a flexible shaftless screw conveyor motor (15) with an inverter that rotates from 200 to 1000 rotations per minute. The input amount of the raw material is set in the range of 500 kg to 1500 kg in accordance with the measurement of the 1.5 cubic meter mixing granulator (5) with the 2 ton measuring device (8). The additive input is controlled by the control panel (14) so as to be set at 10% of the raw material input metering. Until the set amount is reached, the additive measuring bin (1) is moved from the additive tank (13) to the flexible shaftless screw conveyor (12).
Supply to 1). The flexible shaftless screw conveyor motor with inverter (15) automatically stops when a predetermined set amount is reached. At a predetermined set dosage, the 200 kg additive weighing bin (11) opens the additive gate (16) and charges the additive to the mixing granulator (5). The mixing granulator (5) kneads and mixes the raw material and the additive by rotating the mixing blade (6) to obtain a predetermined additive chemical effect, and then opens the discharge door (9). Discharge to product chute (17). Control panel (14) Power panel (18)
Is provided so that a series of processing steps can be automatically controlled and also can be manually controlled. Each of these mechanical devices is housed and installed in the unit frame (1),
It can be moved and installed as a unit.

[0007]

According to the present invention, a particle size of 7
The discharge location of soil, sludge, sludge, ash, and dehydrated cake containing water-containing fine particles of less than 5 microns is different, and the treatment method is also different at each site, so the properties are extremely unstable, and it has been difficult to reuse until now. The thing is granulated and solidified with water,
It can be recycled as a stable and uniform quality resource that can be maintained. At the excavation site,
Excavated sludge, which had been disposed of in the past, can be treated on site, recycled, and used for backfilling, shortening construction time and saving material, and introducing environmental impacts such as the introduction of virgin materials. Cost can be significantly reduced. The recycling rate of sludge, which is industrial waste, can be greatly improved. By reducing the amount of sludge waste, it is possible to extend the remaining years of the management type final disposal site, which is difficult to newly install, and to contribute to the suppression of the destruction of the natural environment due to the illegal dumping of large amounts of sludge. By adding a pigment as an additive, sludge can be recycled as sand of various colors and a high value-added product can be created. By blending and using various additives, recycled resources can be used as backfill materials, roadbed materials, horticultural materials, desert greening maintenance materials, fertilizers and various other resources.

[Brief description of the drawings]

FIG. 1 is a plan view showing an outline of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Unit frame 2 Hopper 3 Vibrating screen feeder 4 Shaftless screw conveyor 5 Mixing granulator 6 Mixing granulation wing 7 Motor with inverter 8 Metering device 9 Discharge door 10 Discharge door cylinder 11 Additive weighing bin 12 Flexible shaftless screw Conveyor 13 Additive tank 14 Control panel 15 Motor with inverter 16 Additive discharge gate 17 Product chute 18 Mixing granulation blade 19 Power panel

Claims (4)

[Claims] 1. A hopper with a vibrating screen capable of charging and separating soil, sludge, sludge, ash, and dehydrated cake containing water-containing fine particles having a particle diameter of less than 75 microns is provided in a unit frame. Install a conveying device such as a screw conveyor, and use soil, sludge, sludge, ash,
Weigh the dehydrated cake as a raw material, put it into a mixing granulator,
The additive is conveyed by a flexible shaftless screw conveyor, etc., and is controlled to be supplied to the additive measuring bin so that the additive compounding design ratio is set in advance to the raw material, and the additive is injected into the mixing granulator, fixed and inclined. In the mixing and granulating machine installed as possible, a mixing and granulating blade rotating at an arbitrary rotation speed at an arbitrary position is arranged, and the raw materials and additives are kneaded,
Recycling of water-containing fine particles characterized in that soil, sludge, sludge, ash, and dehydrated cake containing water-containing fine particles having a particle size of less than 75 microns are each made into water-containing granules and solidified into reusable granules and recycled. apparatus. 2. A hopper provided with a transport function for charging soil, sludge, sludge, ash, and dehydrated cake containing water-containing fine particles having a particle diameter of less than 75 microns is provided in a unit frame, and a mixing hopper is provided below the hopper. The raw material is charged to the granulator, weighed, the additive is transported by the additive supply device, and is controlled to be supplied to the additive weighing bin so that the additive compounding design ratio is set in advance for the raw material. Into the granulator,
In the mixing and granulating machine installed fixed and tiltable, the mixing and granulating blades are installed so that they can be rotated by a motor with an inverter, and these devices are housed in a unit frame,
Kneading raw materials and additives, granulating and solidifying soil, sludge, sludge, incineration residue, and dewatered cake, each containing water-containing fine particles with a particle size of less than 75 microns, into usable granules for recycling. A mobile type water-containing fine particle recycling apparatus, characterized in that: 3. A mixture granulator containing soil, sludge, sludge, ash, and dewatered cake containing water-containing fine particles having a particle size of less than 75 microns is charged into the mixture granulator as a raw material, and the mixture is stirred by the mixture granulator. Soil containing water-containing fine particles having a particle size of less than 75 microns.
Sludge, sludge, ash, and dewatered cake are each kneaded with a superabsorbent polymer and a hardening accelerator, kneaded, water is taken into the superabsorbent polymer, solidified with water, and recycled without mechanical dehydration. A method for recycling water-containing fine particles into resources. 4. The method according to claim 3, wherein the raw material of the hardening accelerator is obtained by finely pulverizing cotton / glass fiber into a fibrous form.