JPH0585500U - Sludge recovery truck - Google Patents

Abstract

(57) [Summary] [Purpose] Sludge separation performance is achieved by using a flocculant and without the need for a mixing tank or floc formation tank, thereby reducing the size of the device and without decreasing sludge treatment capacity. Improve the efficiency of the sludge recovery vehicle. [Structure] The high-pressure water sent from the high-pressure water pump 13 is supplied to a jet pump 10 provided at the tip of the recovery hose 3,
The sludge is sucked up by the jet pump and is conveyed together with the high pressure water into the settling tank 2 through the recovery hose 3, and the sludge is separated and settled in the settling tank 2 to be treated and recovered, and then the supernatant water is again supplied to the high pressure water pump 13. In the sludge recovery vehicle designed to suck out, the coagulant tank 17 is connected to the suction side of the high-pressure water pump 13. As a result, the high-pressure water containing the coagulant is rapidly mixed with the raw water as a jet flow from the jet pump 10 into the recovery hose 3, and both are rapidly mixed, and the recovery hose 3 is used. Generate flock.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sludge recovery vehicle for dredging sludge in rivers, lakes and marshes, civil engineering sites, etc., or sludge pits for industrial waste.

[0002]

[Prior Art]

 Conventionally, as an apparatus used for dredging of this type of sludge or sludge pit, there is known an apparatus as disclosed in, for example, Japanese Patent Application Publication No. 176500.

That is, this product supplies high-pressure water sent from a high-pressure water pump to a jet pump provided in the middle of a recovery hose, and this jet pump sucks up raw water containing sludge such as sludge and sludge pits to obtain high pressure water. The sludge is separated and settled in the settling tank through the collection hose through the collection hose, and the dust and sludge are collected by the waste collection conveyor and sludge collection conveyor provided in the settling tank. The remaining supernatant water is supplied to the high-pressure water pump again.

As described above, in the above means, the settling tank is used to separate and recover the solid matter from the raw water containing the solid matter such as sludge, but this settling 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 processing capacity.

Of course, as a means for compensating for this, for example, as is actually practiced in water purification plants, raw water is introduced into a mixing pond arranged in series and in multiple stages to remove vanadium sulfate, polychlorinated aluminum, etc. By adding a flocculant and rapidly mixing it to form aluminum hydroxide, sludge is gradually flocculated in the aluminum hydroxide as a medium into agglomerates, which are then further aggregated in the next floc formation pond. A known method is to stir to make coarse and dense flocs, and then separate and settle in a sedimentation basin.

[0006]

[Problems to be solved by the device]

 However, in order to apply such a method to a sludge recovery vehicle, a mixing tank that rapidly mixes a flocculant with raw water containing sludge to agglomerate sludge, and floc formation that makes this agglomerated sludge into larger agglomerates Since a tank is required and the equipment itself becomes large, the size of the equipment is limited due to the space and weight restrictions on the vehicle, and there is a problem that the sludge treatment capacity must be reduced.

Therefore, an object of the present invention is to use a flocculant and not to require a mixing tank or a floc formation tank, thereby making it possible to downsize the device and thereby reduce sludge treatment performance. It is to provide a sludge recovery vehicle equipped with a new mechanism that can improve only the separation performance of the sludge and significantly improve the efficiency of the sludge recovery vehicle.

[0008]

[Means for solving the problem]

 In order to achieve the above 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 sucks up sludge and Is transported together with high-pressure water through a collection hose into the settling tank, and after sludge is separated and settled in the settling tank for treatment and collection, the high-pressure water pump is used to collect the supernatant water again. The coagulant tank for supplying the coagulant to the suction side was connected.

[0009]

[Action]

 As a result, the coagulant supplied to the suction side of the high-pressure water pump is supplied to the jet pump while being mixed with the high-pressure water, and at the jet pump, the high-pressure water mixed with the coagulant and the recovery hose are supplied. The raw water containing the sludge that has been sucked up becomes a jet flow and is jetted into the recovery hose 3, where it is rapidly mixed and the coagulant begins to work to agglomerate the sludge.

Further, in the high-pressure water and the raw water containing the coagulant rapidly mixed as described above, the sludge agglomerates gradually while passing through the comparatively long recovery hose 3, and the coarse particles having a large specific gravity are obtained. Will be sent to the sedimentation tank.

[0011] 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 while using a flocculant and without using a mixing tank or a floc formation tank. Therefore, even with vehicles of the same size, it is possible to improve only the sludge separation performance without lowering the sludge treatment capacity and significantly improve the efficiency as a sludge recovery vehicle.

[0012]

【Example】

 The invention will be described below with reference to the drawings.

1 and 2, a sludge recovery vehicle A, which is an embodiment of the present invention, has 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 carrying the raw water contained therein.

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 flocculant can be supplied into the inside.

Further, in the settling tank 2, a screw conveyor 7 for collecting the settled sludge S, and a sludge recovery conveyor that is connected to the screw conveyor 7 and drains the collected sludge S to the outside while draining it. 8 is provided on the vehicle body 1, and a transfer conveyor 9 for loading and unloading the sludge S carried by the sludge recovery conveyor 8 onto the transport vehicle B is provided on the vehicle body 1.

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

The recovery hose 3 whose base end is connected to the raw water receiving tank 4 extends with a sufficient length from this, and a jet pump 10 is provided at the tip, and from this jet pump 10. Furthermore, 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 settling tank 2 through a passage 14, and The discharge side is connected to the jet pump 10 by a high-pressure hose 15. The high-pressure water pump 13 sucks the supernatant water in the settling tank 2 and supplies it to the jet pump 10 at a high pressure. It is designed to drive 10.

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

Further, an overflow chamber 20 communicating with the inside of the settling tank 2 via a strainer 19 is provided above the inside of the settling tank 2, and from this overflow chamber 20, a return hose 21 goes outward. The supernatant water overflowing from the settling tank 2 to the overflow chamber 20 is returned to the original sludge recovery site C by the return hose 21.

Next, the operation will be described.

After pulling out the transhipment conveyor 9 toward the bed of the carrier B, the control panel 22 provided on the vehicle body 1 is operated to start the high-pressure water pump 13 and the supply pump 16, and at the same time. The sludge recovery conveyor 8 and the transshipment conveyor 9 are also started.

When the high-pressure water pump 13 and the supply pump 16 are started, 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 supply pump 16 causes the flocculating agent tank 17 to coagulate. 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 jet pump 10 operates by the supply of this high-pressure water to suck up the sludge S such as sludge at the recovery site C from the tip of the suction hose 11, and the high-pressure water and the sludge are mixed with each other from the recovery hose 3. It is transported to 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 become a jet flow from the jet pump 10 and are jetted into the recovery hose 3 so that they are rapidly mixed and coagulated at this point. The agent begins to work and the sludge S begins to agglomerate.

Therefore, the high pressure water containing these coagulants 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.

Further, in the raw water containing the high-pressure water and the sludge S rapidly mixed as described above, the sludge S gradually agglomerates while passing through the comparatively long recovery hose 3, resulting in a coarse and large specific gravity. The particles become flocs and are transported to the raw water receiving tank 4 in the settling tank 2.

From this, the sludge S becomes a relatively large floc and is sent to the raw water receiving tank 4 of the sedimentation tank 2 without using the floc formation tank.

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

Thus, the sludge S that is relatively coarse and has a large specific gravity and is contained in the raw water rapidly settles in the settling tank 2, and is collected by the screw conveyor 7 while being collected at the base end of the sludge recovery conveyor 8. Collected in a portion, transported while being drained by the recovery conveyor 8, transferred to the transshipment conveyor 9, and sent to the carrier B for loading.

The sludge S at the sludge collection site C is successively collected by repeating the above operation.

On the other hand, as this operation progresses, 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, but the water thus grown overflows through the strainer 19. It overflows into the chamber 20 and returns from here to the sludge collection site C through the hose 21.

[0034]

[Effect of the device]

 As described above, according to the present invention, a flocculating agent is used, and neither a mixing tank nor a floc formation tank is required. Therefore, even if the vehicle is the same size, the sludge treatment capacity is not deteriorated and the sludge treatment capacity is reduced. It has the effect of improving only the separation performance of the sludge and significantly increasing the efficiency as a sludge recovery vehicle.

[Brief description of drawings]

FIG. 1 is a diagram showing a sludge treatment situation of a sludge recovery vehicle according to an 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]

 A Sludge recovery vehicle B Transport vehicle C Sludge recovery site S Sludge 1 Vehicle body 2 Sedimentation tank 3 Recovery hose 8 Sludge recovery conveyor 9 Transloading 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

Claims (1)

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