JPS6238730Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The invention is a method for mechanically converting water-containing particles such as gravel, crushed stone, sand, soil, or mixtures thereof into solid-liquid without drying or other heating means. This relates to a dehydration device that separates and dehydrates the water.

Prior Art The basic structure of this type of dewatering device is shown in Japanese Patent Publication No. 55-24029 filed by the present applicant. This dehydration device uses air introduced from one end of the water-containing granules put into a long cylindrical dehydration cylinder (pressure-feeding cylinder) to eject them from an opening at the other end (discharge port) and onto a rotating plate facing the discharge port. The granules and water are separated by collision, and the moisture is passed through a partition plate (solid-liquid separation plate) made of a wire mesh fixed around the rotating plate and discharged from the liquid chute, and the granules are separated from the solid chute. We are collecting more.

Problems that the invention aims to solve Water-containing particles are fed into the device by air introduced into the pressure cylinder and solid-liquid separation is carried out, but the dehydration processing capacity of the dehydration device with the above structure is limited by the air flow. It's decided by then. In order to improve processing capacity, it is necessary to increase the amount of air discharged.
In conventional dehydration equipment, the cross-sectional area of the chute is small and there is a limit to the amount of air discharged, so the amount of air blown cannot be increased.
It is not possible to increase the amount of water-containing granules fed per unit time. As a result, it took time to dehydrate the water-containing granules, resulting in poor working efficiency.

Means for Solving the Problems The present invention allows the water-containing granules charged into the pressure feeding tube 3
The air introduced from the air outlet 3a at one end of the pressure-feeding tube 3 is injected from the outlet 3b at the other end, and is caused to collide with the rotary plate 6 disposed opposite the outlet 3b of the pressure-feeding tube 3. It is arranged around the rotary plate 6 and rotates as one body with the rotary plate 6, and the pressure feeding cylinder 3
In the dewatering apparatus, solid-liquid separation is carried out through a dewatering basket 11 which is expanded in a lattice shape on the side, and water separated from the granules is discharged into a drainage pit 16 through a drainage chute 15. Cyclone 20 for forcibly sucking air from
One end of the suction duct 22, 26 or 30 is opened for connection, and the other end of the duct 22 is opened for connection to at least one of the drainage chute 15 or the drainage pit 16.

Embodiments The present invention will be described below based on illustrated embodiments.

In FIGS. 1 and 2, 1 is a casing, which is installed on a pedestal 2. Reference numeral 3 denotes a cylindrical pressure tube inserted into the casing 1 from the side with approximately half of its total length in a horizontal state, and an air outlet 3a connected to a blower 4 is provided at the outer end of the pressure tube 3. A discharge port 3b is opened at the inner end. 5 is a hopper placed at the rear of the pressure-feeding tube 3;
The opening edge 5a extends to the vicinity of the center of the pressure-feeding tube 3 and is inclined toward the discharge port 3b so that the air flow velocity increases just before the position of dropping into the container and prevents the accumulation and residual of water-containing particles. It's open. Further, around the outer periphery of the discharge port 3b side of the pressure-feeding cylinder 3, there is a first scattering prevention plate 7 with a small diameter facing the rotary plate 6, and a second scattering prevention plate 8 with a large diameter located behind it. It is fixed upright to the cylinder 3. The rotary plate 6 is fixed to the inner end of the rotary shaft 9 and is disposed within the casing 1 so as to face the discharge port 3b.
It is configured to be rotated by a drive device such as a motor (not shown) via a pulley 10 attached to the tip protruding outside the casing 1 of the casing 1. 1
Reference numeral 1 designates a dewatering basket that rotates integrally with the rotary plate 6, and has a shape that expands toward the air outlet 3a side of the pressure-feeding tube 3 so as to have a predetermined distance from the outer circumferential ends of the scattering prevention plates 7 and 8. , the granules have a solid-liquid separation function that allows only water to pass through and not allow them to pass through. 12 is a solid collecting chamber in the casing 1 into which dehydrated granules flow, 13 is a solid chute provided below the solid collecting chamber 12, 14 is a liquid collecting chamber into which water separated from the granules flows, and 15 is a liquid collecting chamber. This is a drainage chute provided below the gathering room 14.

16 is a drainage pit sealed under the ground.
The distal end of the drain chute 15 is connected to the drain pit 16 and opened. 17 is a submersible pump installed in the drainage pit 16, 18 is a drainage pipe connected to the submersible pump 17, 19 is a filter material made of a wire mesh installed upright to partition the inside of the drainage pit 16, and 20 is an air source from the drainage chute 15. This cyclone 20 is installed on a pedestal 21. A suction duct 22 has one end connected to the upper part 20a of the cyclone 20 and the other end connected to the drainage pit 16. The fine particles floating in the drainage pit 16 are then sucked into the suction duct 2 along with the air.
2 into a cyclone 20 and centrifuged to prevent these particles from scattering into the atmosphere. Reference numeral 23 denotes a connecting pipe whose both ends are connected to the drainage pit 16 and the lower part 20b of the cyclone 20, respectively, and the granules centrifuged and collected in the lower part 20b of the cyclone 20 are returned to the drainage pit 16 through this connecting pipe 23. 24 and 25 are dampers provided in the drainage chute 15 and the suction duct 22, respectively.

Therefore, in order to dehydrate the water-containing granules using the dehydrating device having the above configuration, the rotating plate 6 and the dehydrating basket 11 are required.
At the same time, while the blower 4 is sending air at a predetermined flow rate from the air outlet 3a into the pressure tube 3, the water-containing granules are introduced into the pressure tube 3 from the hopper 5, and the air flow causes the water-containing particles to be transferred to the discharge port 3b side. to be pumped to. At the same time, the cyclone 20 is activated to suck the air inside the drain pit 16 and reduce the pressure.
A suction force is applied to the drainage chute 15 communicating with the drain chute 6. Since air is forcibly sucked from the drainage chute 15 by this suction force, the amount of air discharged increases, and the amount of air blown to the pressure feeding tube 3 increases accordingly, resulting in the amount of water-containing granules fed per unit time. increases significantly. Then, the water-containing particles ejected from the discharge port 3b by the air flow are transferred to the rotary plate 6.
The particles collide with the first anti-scattering plate 7, and then again the rotating plate 6. In the process of repeating this collision, the particles and water are completely separated, and the particles are bounced off the first anti-scattering plate 7. The dehydration basket 11 gradually moves toward the outer circumference from the gap between the plate 7 and the dehydration basket 11 and is further rotated.
The dewatering basket 11 is guided to the inclined inner surface by the centrifugal force of
Enter the solid collection chamber 12 in the front casing 1,
It is recovered in a dehydrated state from the solid chute 13 below. On the other hand, the water separated and scattered from the granules passes through the dehydration basket 11, enters the liquid collection chamber on the back side thereof, and is sent to the drainage pit 16 via the drainage chute 15 below.

The drainage pit 16 is depressurized by the suction force of the cyclone 20, and since the suction force is acting on the drainage chute 15, the fine particles floating in the drainage chute 15 or the drainage pit 16 are sucked into the suction duct along with the air. The water is sucked into the cyclone 20 via the cyclone 21, centrifuged and collected at the bottom of the cyclone 20, and then returned to the drainage pit 16 via the connecting pipe 23. In addition, the above drainage pit 1
The degree of pressure reduction in step 6 may be adjusted using the dampers 24 and 25.

Figure 3 shows another embodiment of the present invention.
The same parts as in the above embodiment are indicated by the same reference numerals, and the explanation thereof will be omitted. That is, in this embodiment, the tip of the suction duct 26 communicating with the upper part of the cyclone 20 is connected to the base 15a of the drainage chute 15. Note that 27 is an agitator connected to the upper surface of the cyclone 20 via an exhaust duct 28, and this agitator 27 is further connected to a wet dust collector (not shown) via the duct 27. 30 is a damper provided within the suction duct 28.

FIG. 4 shows still another embodiment of the present invention, in which the suction duct 31 communicating with the upper part of the cyclone 20 is branched, and one branch duct 31a is connected to the base 15a of the drainage chute 15. The other branch duct 31b is connected to the drainage pit 16 and opened. 32 and 33 are dampers provided in each branch duct 31a and 31b.

As a means for increasing the amount of air sent to the pressure tube 3, in addition to the above embodiment, a branch duct open to the atmosphere may be fixed in a part of the drainage chute 15, or a branch duct open to the atmosphere may be installed. The cross-sectional area of the chute 15 may be increased.

Furthermore, on the lower surface of the pressure-feeding cylinder 3, there are slit plates 3 at several locations inside and outside the casing 1, as shown in FIG.
4 is installed diagonally, a first liquid chute 35 is arranged below the slit plate 34 outside the casing 1, and a second liquid chute 36 is arranged below the slit plate 34 inside the casing 1. , both liquid chute 35 and 36 may be combined outside the casing 1.

Effects of the invention According to the invention, the amount of air discharged increases and the amount of air blown increases accordingly, so the amount of water-containing particles sent into the pressure tube per unit time increases significantly. As a result, it becomes possible to dehydrate a large amount of water-containing granules in a short time, and work efficiency can be greatly improved.

[Brief explanation of the drawing]

Fig. 1 is a partially cross-sectional explanatory diagram showing a first embodiment of the dehydrating device according to the present invention, Fig. 2 is a partially omitted vertical sectional view of the dehydrating device, and Fig. 3 is a second embodiment of the dehydrating device. FIG. 4 is a partial cross-sectional explanatory diagram showing a third embodiment of the dewatering device; FIG. 5 is a partially omitted vertical cross-section of the dewatering device in which a slit plate is attached to the pressure tube. It is a diagram. 3... Pressure tube, 3a... Air outlet, 3b... Discharge port, 6... Rotating plate, 11... Dewatering basket, 15... Drain chute, 16... Drain pit, 20... Cyclone, 22, 26 , 30... Suction duct.

Claims (1)

[Scope of utility model registration request] The water-containing granules put into the pressure-feeding cylinder are injected from the outlet at the other end by air introduced from the air outlet at one end of the pressure-feeding cylinder, and the rotating collides with the plate, is arranged around the rotating plate and rotates as one with the rotating plate, and
In the dehydration device, solid-liquid separation is carried out through a dewatering cage that expands in a shape of a bulge on the side of the pressure-feeding cylinder, and the water separated from the granules is discharged into a drainage pit through a drainage chute. A dewatering device characterized in that one end of a suction duct is connected to a cyclone for forcibly sucking air, and the other end of the duct is connected to at least one of a drainage chute and a drainage pit.