JPH11199047A - Residue slurry transfer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a facility without installing a residue water tank by transferring a residue to a separator as a residue slurry after connecting a crusher for crushing the residue with a jet pump a shoot therebetween and supplying the water to the shoot. SOLUTION: The residue mixed in a sewage is raked up in a sedimentation basin by a dust collector 1 such as a bar screen and carried to the crusher 3 through a belt conveyer 2. A jet pump 11 is connected to the exit of the crusher 3 through a shoot 10 and water for miscellaneous use is supplied into the shoot 10 in order to be sucked the redidue crushed more finely by the crusher 3 into the jet pump 11 easily. The residue and miscellaneous use water are sucked together by the jet pump 11 and formed to a residue slurry and transfered to a residue separator 6. A separated liquid separated from a solid part is returned to a drive water tank 9 by which the drive water of the jet pump 11 is supplied. As this method does not need the installation of the residue water tank, the facility cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sewage treatment plant,
More specifically, the present invention relates to a device for converting “sewage (floating contaminants)” collected in a sand basin in a sewage treatment plant into a slurry and transferring the slurry to a dewatering machine.

[0002]

2. Description of the Related Art Sewage sent to a sewage treatment plant contains suspended impurities such as sand, paper, cloth, wood chips, etc., which damage pumps, valves and other machinery. A sand basin is installed as a means to prevent this, sand is deposited in the sand basin, and the residue is collected by a dust remover such as a bar screen, and the sewage sent to the sewage treatment plant in this way is collected in advance by the sand basin. After removal of sand and residue, the process is shifted to the next processing step.

Conventionally, as a means for taking out the residue collected by a dust remover in a sand basin outside the system, as shown in FIG. 2, the residue removed by a dust remover 1 such as a bar screen is removed by a belt conveyor 2. , Into the crushing machine 3, finely crushed, and then into the residue tank 4. Miscellaneous water (water treated for rainwater and wastewater, which cannot be used as drinking water, but is used for watering, fountains, cooling water, etc.) is supplied into the wastewater tank 4. It is stored in a slurry form in the wastewater tank 4.

[0004] Slurry residue (residue slurry)
The sewage is sent to a sewage separator 6 by a jet pump 5 installed in a sewage tank 4, where solid-liquid separation is performed by the separator 6, and the solid residue is sent to a dehydrator 7. The water is then dewatered, dropped into the storage hopper 8, and carried out of the system. The separated liquid separated from the solid content is returned to the driving water tank 9 which supplies the driving water for the jet pump 5. Miscellaneous water is supplied to the driving water tank 9, and surplus water in the driving water tank is drained to a sand basin.

[0005]

The above-mentioned conventional sewage transfer means is provided with a sewage tank 4 which slurries the sewage in the sewage tank and slurries the sewage with a jet pump 5 to remove the slurries. Since the wastewater was sent to No. 6, a wastewater tank and an installation place for the water tank were required, and equipment costs were accordingly high. An object of the present invention is to simplify equipment and reduce equipment costs without installing the above-mentioned residue tank.

[0006]

A crusher 3 for crushing the residue collected from a sand basin and a jet pump 11 are connected via a chute 10 therebetween.
, And transferred to the separator 6 as a residue slurry.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a residue slurry transfer apparatus according to the present invention will be described below. FIG. 1 is an explanatory view showing a residue transporting means when the residue slurry transfer device according to the present invention is used. The residue mixed in the sewage is settled in a sand basin in the same manner as before.
And conveyed to the crusher 3 via the belt conveyor 2. A jet pump 11 is connected to the outlet of the crusher 3 through a chute 10. Miscellaneous water is supplied into the chute 10 so that the finely crushed residue is easily sucked into the jet pump 11. Have been. Then, the residue and the miscellaneous water are sucked together by the jet pump 11 to form a residue slurry, which is transferred to the residue separator 6.

[0008] The subsequent operation is the same as in the prior art, where solid-liquid separation is performed by the separator 6, the solid residue is fed to a dehydrator 7, dewatered, dropped into a storage hopper 8, and discharged outside the system. It is carried out. The separated liquid separated from the solid content is supplied to the jet pump 11
Is returned to the driving water tank 9 that supplies the driving water.
Miscellaneous water is supplied to the driving water tank 9, and surplus water in the driving water tank is drained to a sand basin.

[0009] In the illustrated example, the miscellaneous water is supplied to the chute 10, but a part of the separated liquid or a part of the driving water may be supplied. In addition, a running water trough (not shown) may be used instead of the belt conveyor 2 as a means for transporting the residue from the dust remover 1 to the crusher 3. In that case, a part of the chopping water, the separated liquid or the driving water is supplied to the running water trough, and the supply of water to the chute 10 is unnecessary.

[0010]

According to the present invention, it is not necessary to install a scum tank, so that the equipment cost can be reduced, and when the scum is sucked into the jet pump 11, it is mixed with the high-pressure driving water of the jet pump. Therefore, it has the effect of being cleaned.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a residue transport means when a residue slurry transfer device according to the present invention is used.

FIG. 2 is an explanatory view showing a conventional sewage carrying slurry conveying means.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 dust remover 2 belt conveyor 3 crusher 4 sewage tank 5 jet pump 6 sewage separator 7 dehydrator 8 storage hopper 9 drive water tank 10 chute 11 jet pump

Claims (3)

[Claims] 1. A crusher (3) for crushing sewage collected from a sand basin, connected to a jet pump (11), and transferred to a separator (6) as sewage slurry. Slurry transfer device. 2. A chute (10) is provided between the crusher (3) and the jet pump (11).
2. The slurry transfer apparatus according to claim 1, wherein water is supplied to the slurry. 3. The slurry transfer apparatus according to claim 1, wherein the waste collected from the sand basin is transported to a crusher (3) through a running water trough.