JPH0663599A - Dehydration drying method for sludge, soil and the like and its device - Google Patents

Abstract

PURPOSE:To compress sludge, soil, etc., which are industrial waste to solid cake by a vacuum car and to release the compressed waste water as pollution- free water quality. CONSTITUTION:This dehydration drying method comprises sucking and housing the sludge, soil, etc., 4 into a vacuum tank 3 by using the vacuum car 1, then compressing the sludge, etc., by a piston toward a screen 5 provided at an opening/closing cap 11 at one end of the tank 3 to form the solid cake 10 and screening the compressed water by a screen 5 to the standard for prevention of water pollution or below.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehydration / drying method for sludge, sand and the like using a vacuum truck, and an apparatus therefor.

[0002]

2. Description of the Related Art In a conventional vacuum car, only the whiskers sucked into the tank and the sand and sand are pressurized and discharged to the outside from the hose connected to the discharge port, so they are treated as industrial waste and discarded anywhere. I couldn't do that.

[0003]

SUMMARY OF THE INVENTION According to the present invention, a solid cake which is sucked into a vacuum tank and industrial waste such as earth and sand is forced into the tank by forced consolidation and forced dehydration, and the solid cake can be easily removed from the tank. The purpose of the present invention is to reuse the above solid cake that is discharged and is not handled as industrial waste as backfilling soil and landfilling soil, and drains the dehydrated wastewater in good water quality.

[0004]

In order to achieve the above object, the present invention depressurizes the inside of a vacuum tank of a vacuum vehicle, sucks and stores sludge and earth and sand in the tank by the suction force by the depressurization. Of the sludge and earth and sand toward the screen provided at one end of the solid cake with a piston, the concentration of the compressed water is filtered by the screen below a predetermined standard of water pollution, the screen is moved to move the solid Dewatering and drying method of sludge and earth and sand, which is characterized by discharging the cake to the outside of the tank.
A method for dehydrating and drying sludge and earth and sand according to the invention, which has a step of evaporating water in the earth and sand and discharging the water to the outside of the tank. A vacuum tank is provided on the chassis of a vacuum car, and the tank is cylindrical. , An opening / closing lid is provided at one end of the tank,
A drainage pipe communicating with the outside is provided outside the opening / closing lid, an opening / closing valve is provided in the drainage pipe, a screen is provided inside the opening / closing lid, and a piston is fitted inside the tank. Dewatering and drying device for sludge and earth and sand, which is provided with a jack for reciprocating the piston at the other end of the tank. The tank is provided in the front-rear direction, and one end is a rear end.
The other end is the front end. The dewatering / drying device for sludge / sand / sand according to the third invention. The opening / closing lid is the end plate of the tank, and the water collecting chamber is interposed between the inlet opening of the drainage pipe and the screen. The sludge / debris dewatering / drying device according to the third or fourth invention, which is formed of the above-mentioned third, fourth or fifth invention, wherein the screen is a multi-layer screen including a cloth, a wire net and a support frame.・ Dewatering and drying device for sediments The screen mesh can prevent water pollution.
Dewatering / drying device for sludge and earth and sand according to the fourth, fifth or sixth invention, wherein an exhaust pipe of a running drive engine of a vacuum vehicle is branched through a switching valve, and the branch pipe is connected to the tank. Sludge according to the third, fourth, fifth or sixth invention, respectively.
Consists of a dewatering device for sediment.

[0005]

In the present invention, the opening / closing valve 13 of the drain pipe 12 is closed, and the air in the vacuum tank 3 on the chassis 2 is sucked and removed by the blower 15 to reduce the pressure in the tank 3 and connect it to the upper portion of the tank 3. When the flexible hose connected to the tip of the suction hose 16 is inserted into sludge, mud or earth and sand and the opening / closing valve 17 of the hose 16 is opened, the earth and sand 4 is sucked into the tank 3.

At this time, the piston 9 in the tank 3 is located at the front end portion inside the tank 3, and the earth and sand 4 is sucked and housed between the piston 9 and the screen 5 at the rear end portion (FIG. 1). In this state, the open / close valve 17 of the suction hose 16 is closed, the open / close valve 13 of the drain pipe 12 is opened, and the reciprocating jack 14 is operated to move the piston 9 toward the screen 5 from the position shown by the solid line in FIG. When slid to the line position, the earth and sand 4 are squeezed between the screen 5 and the piston 9 to form a solid cake 10, and the squeezed water passes through the screen 5 and is filtered below the water pollution prevention standard to collect water. It is accumulated in 11 ″ and is further discharged from the drain pipe 12 to the outside.

By switching the switching valve 39, the exhaust gas of the driving engine 37 is introduced from the branch pipe 40 into the tank 3.
The water content of the earth and sand 4 can be evaporated.

In this state, the opening / closing lid 11 is opened as shown in FIG. 3, the rear end of the tank 3 is opened, and the solid cake 10 is pushed by the piston 9 to bring the cake 10 to the ground 18
To fall. When the tank 3 is tilted as shown in FIG. 3, the cake 10 falls to the ground 18 by its own weight. After that, the piston 9 and the opening / closing lid 11 are returned to their original positions, the tank 3 is also returned to its original horizontal position, and this is repeated.

[0009]

[Example] A driver's seat 2'is provided at the front of the chassis 2 and front wheels 19 are provided.
Also, a vacuum tank 3 having a cylindrical shape, an elliptic cylindrical shape, a rectangular cylindrical shape, or the like is provided in the front-rear direction on the chassis 2 having the drive rear wheels 20. The blower 1 provided on the chassis 2 is above the tank 3.
It is possible to connect the suction pipe 15 'of No. 5 and to suck and discharge the internal air to make the inside of the tank 3 into a vacuum (reduced pressure). Further, the suction pipe or the upper end of the suction hose 16 is connected to the upper portion of the tank 3, and the lower end is fixed to the rear portion of the chassis 2, and the opening / closing valve 1 is fixed to the fixed portion.
7, and a suction flexible hose for sludge, mud or sand 4 is connected to the lower end.

At the rear end (one end) of the tank 3, there is arranged an opening / closing lid 11 provided with a flange 21 'that abuts the rear end flange 21 on the outer circumference of the bulging mirror plate 11', and both flanges 21, 2 are provided.
The arms 22 and 23 provided on the upper part of 1'are attached to the horizontal horizontal pin 2
5, which is pivotally supported by the arm 21 ′ on the end plate 11 ′ side and the tank 3
The lid 11 can be opened and closed from the closed position shown in FIG. 1 to the open position shown in FIG. 3 by connecting the arm 26 provided on the upper surface of the above with the cylinder 27.

A drainage pipe 12 communicating with the outside is provided outside the opening / closing lid 11, and an opening / closing valve 13 is provided in the drainage pipe 12, and the inside of the lid 11 is made of angled steel. A pressure-resistant multi-layer screen 5 composed of a grid-shaped support frame 8, a wire net 7 and a cloth 6 is provided, and the water collecting chamber 11 is provided between the screen 5 and the end plate 11 ′ or between the inlet opening 12 ′ of the drain pipe 12. And the mesh of the cloth 6 of the screen 5 is 74 μφ or less (Fukuoka water pollution standard),
It is possible to prevent water pollution. Of course, the number of layers of the cloth 6 and the wire mesh 7 may be plural.

A piston 9 is fitted into the inside of the tank 3 as described above, and is reciprocally slidable from the front end (the other end) to the front end (the one end) of the tank 3 and is reciprocated outside the front end. The operation jack 14 (hydraulic jack) can be slid back and forth from the solid line position in FIG. 1 to the virtual line position. Such a tank 3 can be mounted not only in the front-back direction but also in the top-bottom direction.
By connecting the upper end of the to the rear part of the tank 3, the pressure reduction when the piston 9 slides forward can be utilized for the suction of the earth and sand 4.

The exhaust pipe 38 of the traveling drive engine 37 provided in the front part of the chassis 2 is branched via a switching valve 39, and the branch pipe 40 is connected to the tank 3 via a check valve 41. .

Reference numeral 28 in the figure denotes a vent hole, and 29 is a machine frame of the jack 14 fixed to the front end of the tank 3. Further, 30 is a hydraulic motor, 31 is a hydraulic pump, 32 is a hydraulic pipe,
Reference numeral 33 is a support shaft between the tank 3 and the chassis 2, 34 is a lifting cylinder for the tank 3, 35 is a reinforcing rib for the tank 3, and 36 is a pedestal for the tank 3.

[0015]

Industrial Applicability Since the present invention is based on the above-described method and apparatus, the vacuum tank 3 of the vacuum car 1 can be used to squeeze the sludge and earth and sand 4 sucked into the tank 3 into a solid cake 10 for industrial use. Not only can it be reused as backfilling sand or landfilling sand that is not handled as waste, but the concentration of compressed wastewater to the solid cake 10 can be suppressed below the water pollution prevention standard, and waste and wastewater can be suppressed. Not only can pollution be prevented, but the solid cake 10 can be quickly and conveniently dropped and discharged anywhere on the ground.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing a dehydration / drying method using a vacuum truck of the present invention.

FIG. 2 is a cutaway front view of a screen.

FIG. 3 is a side view of the open / close lid in an open state.

[Explanation of symbols]

 1 Vacuum Vehicle 2 Chassis 3 Vacuum Tank 4 Sludge and Sediment 5 Screen 6 Cloth 7 Wire Mesh 8 Support Frame 9 Piston 10 Solid Cake 11 Open / Close Lid 11 'End Plate 11 "Water Collection Room 12 Drain Pipe 12' Inlet Opening Port 13 Open / Close Valve 14 Reciprocating jack 37 Drive engine 38 Exhaust pipe 39 Switching valve 40 Branch pipe

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location E02F 7/00 D 9022-2D

Claims (8)

[Claims] 1. A vacuum tank of a vacuum car is depressurized, and the suction force of the depressurization causes sludge to enter the tank.
Suction and storage of earth and sand, squeeze the sludge and earth and sand into a solid cake toward the screen provided at one end of the tank with a piston, and filter the concentration of the squeezed water to below a predetermined standard of water pollution by the screen. A method for dehydrating and drying sludge and earth and sand, wherein the screen is moved to discharge the solid cake to the outside of the tank. 2. A step of sending exhaust gas of a running drive engine of a vacuum vehicle into the tank, evaporating water of sludge and earth and sand in the tank by the gas, and discharging the water out of the tank. The sludge according to claim 1 having
Dewatering and drying method of earth and sand. 3. A vacuum tank is provided on a chassis of a vacuum vehicle, the tank is cylindrical, an opening / closing lid is provided at one end of the tank, and a drain pipe communicating with the outside is provided outside the opening / closing lid. An opening / closing valve is provided in the drain pipe, a screen is provided inside the opening / closing lid, a piston is fitted inside the tank, and a jack for reciprocating the piston is provided at the other end of the tank. Dewatering and drying equipment for sludge and earth and sand. 4. The dewatering and drying apparatus for sludge and earth and sand according to claim 3, wherein the tank is provided in the front-rear direction, one end is a rear end, and the other end is a front end. 5. The sludge according to claim 3, wherein the opening / closing lid is an end plate of the tank, and a water collecting chamber is interposed between the inlet opening of the drainage pipe and the screen. Dewatering and drying equipment for earth and sand. 6. The dewatering and drying apparatus for sludge and earth and sand according to claim 3, wherein the screen is a multi-layered screen composed of a cloth, a wire mesh and a support frame. 7. The dewatering and drying apparatus for sludge and earth and sand according to claim 3, wherein the screen mesh is capable of preventing water pollution. 8. The method according to claim 3, wherein the exhaust pipe of the engine for driving the traveling of the vacuum vehicle is branched through a switching valve, and the branched pipe is connected to the tank. Dewatering and drying equipment for the sludge and earth and sand listed.