JPS59136184A - Treating device for waste water from moving type dock - Google Patents

Abstract

PURPOSE:To make a titled device compact and inexpensive by incorporating the treating stage necessary for treating waste water which is raw water in said device and constituting movably the device. CONSTITUTION:This treating device for waste water from a moving type dock is placed on the ground around a repair dock 2 into which a ship 1 to be repaired is docked. Raw water W which is the waste water collected in a water collecting pit 6 is fed by a raw water pump 8 to this treating device where a flocculating assistant is added to the water through a grit tank 9 and thereafter the water is fed to a tank 10 with low speed stirring means. The water is then fed from the lower part of the tank 10 to the center in the bottom of a pressurized floating tank 12 where pressurizing water is added to the water W by a pressure water tank 15 and a pressure water pump 16 to float scum on the surface of the raw water. The scum is raked by a sludge scraper 13 and is dropped into a tank 14 for the pressure floating scum. The raw water W which is subjected to the primary treatment falls from the triangular weir around the upper part of the tank 12 and is fed through an intermediate tank to a sand filter 18. The filtered water is stored temporarily in a treated water tank 19 and is released as treated water Wc into the sea, outboard.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a transfer type dock wastewater treatment device used for treating and discharging wastewater into the sea.

Unlike the case of a newly built ship, at the dock where a repair ship is docked, wastewater containing oil (last water, shell washing water, various bilges, etc.) is discharged, and these wastewaters are completely drained. Pollution prevention ordinances require that wastewater be treated and released into ponds as clean seawater.

Therefore, conventionally, in this type of repair dock, holes are dug underground around each dock and concrete tanks for various treatment processes are installed as wastewater treatment equipment, but in this case, the area occupied by the equipment is There was a problem that the size of the equipment became very large and the cost of the equipment was also very high.

Therefore, the present invention has been made to solve the above problems, and focusing on the fact that the wastewater treatment equipment for repair troughs as described above is not always used, it is possible to transfer water from one dock to the other. It is an object of the present invention to provide a transportable dock wastewater treatment device that is configured to be easily transportable, compact, and inexpensive.

That is, the transportable dock wastewater treatment device of the present invention is characterized by having a built-in treatment process necessary for treating raw water as wastewater and being configured to be transportable.

An embodiment of the present invention will be described below with reference to the drawings, which are perspective views of a transfer type dock wastewater treatment device in an embodiment of the present invention.

The illustrated transfer type dock wastewater treatment device is placed on the ground around a repair dock 2 where a repair ship 1 is docked, and inside this repair dock 2, a Rotsky washer 6, a nozzle 4, etc. is used to clean the outer skin of the repair ship 1, and discharge ballast water containing oil and various bilges, but such drainage is directly under the dock pump room 5 installed in front of the dock gate 21. The water is collected in a water collection pit 6.

Note that if particularly heavily contaminated wastewater is discharged from the repair ship 1 or the like, the portable oil-water separator 7 is used to roughly remove oil and the like in the repair dock 2.

Next, the raw water W of the wastewater collected in the water collection point B is sent by the raw water pump 8 in the dock pump room 5 to the transfer type dock wastewater treatment device (hereinafter simply referred to as the treatment device for convenience) of the present invention.

The raw water W sent to the treatment device first settles relatively large stones, sand, etc. in a sand settling tank 9, and a flocculation aid such as a polymer flocculant is injected into the raw water W.

Next, the raw water W is sent to the slow stirring tank 10 by the overflow from the sand settling tank 9, and is slowly stirred by the slow stirring machine 11 for floc growth. The raw water W is sent to the center of the bottom, where the raw water W is supplied with a pressurized water tank 15 and a pressurized water pump 1.
Pressurized water sent by 6 is added, and flocs float to the surface of the raw water as scum due to microbubbles of the pressurized water, and are scraped up by scum and sludge scraper 16. The scum tack 14 is placed under pressure.

Incidentally, the sludge settled at the bottom of the pressurized flotation tank 12 is also collected in a sludge pin (not shown) by the scum and sludge scraper 16, and taken out by a vacuum car or the like.

With this treatment device that incorporates the wastewater treatment process configured as described above, the raw water W that has undergone the next treatment flows down from the triangular weir provided around the upper part of the pressurized flotation tank 12 and is sent to the intermediate tank 17. C After water is sent to the sand filter 18 and filtered by an intermediate pump (not shown), it is temporarily stored in the treated water tank 19, and then the treated water Wc is poured into the sea outside.
It is released as

In addition, 20 in the figure indicates the primary power supply panel, and when the furnace material of the sand filter 18 becomes clogged, the treated water tank 19
The FU is cleaned by backwashing using the treated water Wc inside, and the dirty backwash water Wn is returned to the concentration pit 6.

As explained above, after the wastewater treatment of raw water W at this repair dock 2 is completed, if wastewater treatment is required at another repair dock, this 1 set of treatment equipment can be moved to the required location using a crane and a trailer. In order to make it easy to move, this processing equipment incorporates equipment for each processing process and various steel tanks three-dimensionally, making it compact as a whole and making it easy to move during transportation. Hooks for crane lifting are provided as appropriate.

In order to send the raw water W to this treatment equipment, the raw water pump 8 that is always available at the repair dock 2 can be used for the purpose, so there is no need to include the raw water pump 8 in the treatment equipment itself, and the equipment is as simple as that. can be made lightweight.

Note that the wastewater treatment step in the treatment apparatus of the present invention may be any wastewater treatment process other than the above embodiments.

It is also applicable to those with a process.

Therefore, the treatment equipment of the present invention requires less installation space than conventional underground concrete wastewater treatment equipment.
It also has the advantage of being about half the production cost.

Furthermore, since the processing equipment of the present invention is of a transportable type, a common processing equipment can be used alternately at two or more repair docks, thereby saving space in the shipyard yard and reducing equipment investment costs. It is extremely effective.

[Brief explanation of the drawing]

The drawing is a perspective view of a transfer type dock wastewater treatment device in an embodiment of the present invention. 2... Repair dock, 6... Water collection pit, 8... Raw water pump, 19... Treated water tank, W... Raw water, Wc
... Treated water.

Claims (1)

[Claims] A transportable dock wastewater treatment device characterized by having a built-in treatment process necessary for wastewater treatment of raw water and being configured to be transportable.