JP2583531Y2 - Sludge collection vehicle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge collection vehicle for dredging sludge in rivers, lakes and marshes, civil engineering work sites, or the like, or for sludge pits of industrial waste.

[0002]

2. Description of the Related Art Conventionally, as an apparatus used for dredging sludge and sludge pits of this kind, for example, the apparatus shown in Japanese Patent Application Publication No. 176500/1999 is known.

That is, in this apparatus, high-pressure water sent from a high-pressure water pump is supplied to a jet pump provided in the middle of a recovery hose, and the jet pump pumps up raw water including sludge and sludge such as sludge pits and collects the high-pressure water together with high-pressure water. After being conveyed through the collection hose into the settling tank, the sludge is separated and settled in the settling tank, and garbage and sludge are collected by the trash collection conveyor and the sludge collection conveyor provided in the settling tank, and then left in the settling tank. The measure is to supply the clear water to the high-pressure water pump again.

As described above, in the above-mentioned means, a sedimentation tank is used to separate and recover solids from raw water containing solids such as sludge, but the sedimentation tank alone is relatively coarse and has a large specific gravity. Since only particles can be separated and collected, and fine particles cannot be collected, there is a problem in terms of processing capacity.

[0005] Of course, as a means for compensating for this, for example, as practiced in a water purification plant or the like, raw water is introduced into mixing ponds arranged in series and in multiple stages to coagulate bansulfate and polyaluminum chloride. The aluminum hydroxide is added to the mixture, and the mixture is rapidly mixed to form aluminum hydroxide.The aluminum hydroxide is used as a medium to gradually aggregate the sludge to form an agglomerate, which is further stirred in the next floc forming pond. A method is known in which a floc is coarse and dense, and then separated and settled in a settling pond.

[0006]

However, in order to apply such a means to a sludge collection vehicle, a mixing tank for rapidly mixing a flocculant into raw water containing sludge to flocculate sludge,
A floc forming tank is needed to make the agglomerated sludge into a larger agglomerate, and the size of the device itself is inevitably increased. Therefore, the size of the device is limited due to space and weight restrictions on the vehicle, and the sludge treatment capacity is not reduced. There was a problem of not getting.

Therefore, an object of the present invention is to use a flocculant and not require a mixing tank or a floc forming tank, thereby reducing the size of the apparatus and reducing the sludge treatment capacity without reducing the sludge treatment capacity. An object of the present invention is to provide a sludge collection vehicle equipped with a novel mechanism capable of improving only the separation performance and significantly increasing the efficiency as a sludge collection vehicle.

[0008]

In order to achieve the above-mentioned object, in the present invention, high-pressure water sent from a high-pressure water pump is supplied to a jet pump provided at the tip of a recovery hose, and the jet pump is used to supply the high-pressure water. While sucking up the sludge, it is transported together with high-pressure water through a collection hose into the settling tank,
After the sludge is separated and settled in the sedimentation tank and treated and collected, the coagulant tank for supplying the coagulant to the suction side of the high-pressure water pump is provided in a sludge collection vehicle in which the supernatant water is sucked again by the high-pressure water pump. It was connected.

[0009]

The coagulant supplied to the suction side of the high-pressure water pump is thereby supplied to the jet pump while being mixed with the high-pressure water, and the high-pressure water mixed with the coagulant at the jet pump and a collection hose. The raw water containing the sludge that has been sucked up into the jet forms a jet stream.
And is rapidly mixed there, where the flocculant begins to work and condenses the sludge.

The high-pressure water containing the flocculant and the raw water rapidly mixed as described above gradually undergoes flocculation of sludge while passing through the relatively long recovery hose 3, and the floc of coarse particles having a large specific gravity. And sent to the settling tank.

Thus, according to the sludge recovery vehicle of the present invention, sludge can be generated as flocs having a relatively coarse and large specific gravity without using a flocculant and without using a mixing tank or a floc forming tank. Even with a vehicle of the same size, only the sludge separation performance can be improved without lowering the sludge treatment capacity, and the efficiency as a sludge recovery vehicle can be significantly increased.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

In FIG. 1 and FIG. 2, a sludge collection vehicle A according to one embodiment of the present invention includes a settling tank 2 for sludge treatment mounted on a vehicle body 1 and a sludge S into the settling tank 2.
And a recovery hose 3 for transporting raw water containing.

A raw water receiving tank 4 is provided above the settling tank 2, and the raw water receiving tank 4 is provided with a coagulant auxiliary tank 6 having a supply pump 5.
The coagulant can be supplied into the raw water receiving tank 4.

In the settling tank 2, a screw conveyor 7 for collecting the settled sludge S, and a sludge collection conveyor 8 connected to the screw conveyor 7 to drain the collected sludge S and to carry it out to the outside. And sludge S conveyed by the sludge collection conveyor 8 on the vehicle body 1
Conveyor 9 for loading and unloading to and from
Is provided.

The raw water receiving tank 4 communicates with the settling tank 2, and the raw water receiving tank 4 is connected to a base end of a recovery hose 3, and the raw water containing the sludge S conveyed through the recovery hose 3. Is once received by the raw water receiving tank 4, where a predetermined amount of coagulant is supplied and mixed into the sedimentation tank 2.

A recovery hose 3 having a base connected to the raw water receiving tank 4 has a sufficient length extending therefrom, and a jet pump 10 is provided at a distal end thereof. The suction hose 11 extends.

On the other hand, a high-pressure water pump 13 driven by a power engine 12 is provided on the vehicle body 1,
The suction side of the high-pressure water pump 13 communicates with the jet pump 10 by a high-pressure hose 15 on the suction side through the passage 14 and the discharge side communicates the supernatant water in the sedimentation tank 2 with the high-pressure water pump 13. The high pressure water is supplied to the jet pump 10 while sucking it, and the jet pump 10 is driven by the high pressure water.

A coagulant tank 17 provided with a supply pump 16 is provided on the vehicle body 1. The coagulant tank 17 communicates with the suction side passage 14 of the high-pressure water pump 13 through a pipe 18. A coagulant can be supplied to the suction side of the thirteen.

Further, an overflow chamber 2 communicating with the inside of the settling tank 2 through a strainer 19 is provided above the settling tank 2.
0, a return hose 21 extends outward from the overflow chamber 20, and the supernatant water overflowing from the sedimentation tank 2 to the overflow chamber 20 is returned to the original sludge collection site C by the return hose 21. I am going to put it back.

Next, the operation will be described.

After the transfer conveyor 9 is pulled out toward the carrier of the transport vehicle B, a control panel 22
To start the high-pressure water pump 13 and the supply pump 16 and, at the same time, start the sludge recovery conveyor 8 and the transfer conveyor 9.

With the start of the high-pressure water pump 13 and the supply pump 16, the supernatant water in the settling tank 2 is sucked into the high-pressure water pump 13 through the passage 14, and at the same time, the coagulation in the coagulant tank 17 is performed by the supply pump 16. The agent is added.

Thus, the high-pressure water containing the coagulant is supplied from the high-pressure hose 15 to the recovery hose 3 through the jet pump 10.

On the other hand, the supply of the high-pressure water causes the jet pump 10 to operate to suck up sludge S such as sludge at the collection site C from the tip of the suction hose 11, and from the collection hose 3 in a state where the high-pressure water and the sludge are mixed. It is conveyed toward the raw water receiving tank 4 on the settling tank 2 side.

At this time, the high-pressure water mixed with the coagulant and the sludge S sucked up from the suction hose 11 are jetted into the recovery hose 3 as a jet stream from the jet pump 10, and are rapidly mixed there. The agent starts working and starts to agglomerate the sludge S.

Therefore, the high-pressure water containing the flocculant and the sludge S are sufficiently rapidly mixed by the jet pump 10 without providing a mixing tank, and the sludge S starts to agglomerate.

The raw water containing the high-pressure water and the sludge S rapidly mixed as described above gradually progresses to agglomeration of the sludge S while passing through the relatively long recovery hose 3, so that coarse particles having a large specific gravity are formed. It is conveyed to the raw water receiving tank 4 in the settling tank 2 as flock.

For this reason, the sludge S is sent to the raw water receiving tank 4 of the settling tank 2 as a relatively large floc without using the floc forming tank.

Then, while observing the properties of the raw water sent to the raw water receiving tank 4, the control pump 22 is operated, if necessary, to start the supply pump 5, and the raw water is supplied from the coagulant auxiliary tank 6 to the raw water receiving tank 4. An appropriate amount of coagulant is added and sent to the settling tank 2 while improving the coagulation performance.

Thus, the sludge S contained in the raw water as a relatively coarse floc having a large specific gravity is rapidly settled in the sedimentation tank 2, and is collected by the screw conveyor 7 while the base end of the sludge collection conveyor 8. They are collected in a part, transported while being drained by the collection conveyor 8, transferred to the transfer conveyor 9, and sent to the carrier B for loading.

While the above operations are repeated, the sludge S at the sludge collection site C is collected one after another.

On the other hand, with the progress of this operation, the water level in the settling tank 2 rises due to the water sucked up together with the sludge S from the tip of the suction hose 11, and the water that has grown is overflowed through the strainer 19 into the overflow chamber 20. , And is returned to the sludge collection site C through the return hose 21 from here.

[0034]

As described above, according to the present invention, the use of a flocculant and the necessity of a mixing tank or a floc forming tank are not required. Therefore, even if the vehicle has the same size, the sludge treatment capacity is reduced. This has the effect that only the sludge separation performance can be improved without any problem, and the efficiency as a sludge recovery vehicle can be significantly increased.

[Brief description of the drawings]

FIG. 1 is a diagram showing a sludge treatment state of a sludge collection vehicle according to one embodiment of the present invention.

FIG. 2 is a diagram schematically showing a sludge treatment and recovery mechanism of the sludge treatment vehicle.

[Explanation of symbols]

 Reference Signs List A sludge collection vehicle B transport vehicle C sludge collection site S sludge 1 body 2 sedimentation tank 3 collection hose 8 sludge collection conveyor 9 transshipment conveyor 10 jet pump 11 suction hose 13 high-pressure water pump 14 passage 15 high-pressure hose 16 supply pump 17 aggregation Agent tank 20 overflow chamber 21 return hose

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) C02F 11/00-11/20

Claims (1)

(57) [Scope of request for utility model registration] 1. A high-pressure water sent from a high-pressure water pump is supplied to a jet pump provided at a tip of a recovery hose, and sludge is sucked up by the jet pump, and the sludge is transported together with the high-pressure water into the settling tank through the recovery hose. After the sludge is separated and settled in the sedimentation tank and treated and collected, the coagulant tank for supplying the coagulant to the suction side of the high-pressure water pump is provided in a sludge collection vehicle in which the supernatant water is sucked again by the high-pressure water pump. A sludge collection vehicle that is connected.