CN-116096629-B - Floating pollutant recovery device and floating pollutant recovery system

CN116096629BCN 116096629 BCN116096629 BCN 116096629BCN-116096629-B

Abstract

The invention aims to provide a floating pollutant recovery device and a floating pollutant recovery system, which can efficiently recover floating pollutants from environmental water taken into a ship. A floating contaminant recovery device (40) which is mounted on a ship (2) and recovers floating contaminants contained in environmental water taken into the ship (2) is provided with a recovery filter (41) which is disposed on a backwash drain line (L4) through which backwash drain water after backwashing a filter (120) of a filter device (12) for filtering the environmental water flows, and a clear water supply mechanism (50) which supplies clear water to the recovery filter (41).

Inventors

MANABE ATSUYUKI
Ju Di Jiangsi
Good friend Thomas
TAKEUCHI KEN

Assignees

三浦工业株式会社
株式会社商船三井

Dates

Publication Date: 20260512
Application Date: 20211015
Priority Date: 20201021

Claims (4)

1. A floating contaminant recovery device which is mounted on a ship and is disposed on a backwash drain line of a filter device for filtering floating contaminants contained in environmental water taken in by the ship, The filter device is arranged at the downstream side of the water intake line of the ship, and filters the environmental water flowing through the water intake line by using a filter, The treated water filtered by the filtering device is stored in a treated water storage tank through a treated water line, The process water is supplied from a direction opposite to a filtration direction of a filter of the filtration device by a backwash line for supplying the process water from the process water storage tank to the filtration device, The backwash drain water after backwashing the filter of the filter device is discharged from the backwash drain line, The floating pollutant recovery device is provided with: A recovery filter disposed in the backwash drain line, and A clean water supply mechanism for supplying clean water to the recovery filter, The clean water supply mechanism comprises: a clean water forward washing line connected to the upstream side of the recovery filter and supplying clean water to the recovery filter from the upstream side of the recovery filter; A clean water backwash line connected to the downstream side of the recovery filter and configured to supply clean water to the recovery filter from the downstream side of the recovery filter; a clear water drain line for draining backwash clear water which is supplied from the clear water backwash line and backwash the recovery filter, and And a recovery container for recovering the backwash clean water flowing through the clean water drainage line.
2. A floating contaminant recovery device according to claim 1, wherein, The floating contaminant recovery device further includes a separator that is disposed upstream of the recovery filter in the backwash drain line and that separates solids contained in backwash drain flowing through the backwash drain line.
3. A floating contaminant recovery device according to claim 1, wherein, The filtering precision of the recovery filter is 200-800 mu m.
4. A floating contaminant recovery system which is mounted on a ship and recovers floating contaminants contained in environmental water taken into the ship, The floating pollutant recovery system is provided with: A water intake line for taking in ambient water to the ship; A water intake pump disposed in the water intake line; A filter device disposed downstream of the water intake line and having a filter for filtering ambient water flowing through the water intake line; a treated water storage tank for storing the treated water filtered by the filtering device; a process water line connecting the filtration device with the process water storage tank; A backwash line for supplying treated water to the filter device from a direction opposite to a filtration direction of the filter; a backwash drain line having an upstream side connected to a position on the upstream side of the filter in the filter device and discharging backwash drain as post-backwash treatment water supplied from the backwash line to the filter device, and A floating contaminant recovery device having a recovery filter disposed in the backwash drain line and a clean water supply mechanism for supplying clean water to the recovery filter, The clean water supply mechanism comprises: a clean water forward washing line connected to the upstream side of the recovery filter and supplying clean water to the recovery filter from the upstream side of the recovery filter; A clean water backwash line connected to the downstream side of the recovery filter and configured to supply clean water to the recovery filter from the downstream side of the recovery filter; a clear water drain line for draining backwash clear water which is supplied from the clear water backwash line and backwash the recovery filter, and And a recovery container for recovering the backwash clean water flowing through the clean water drainage line.

Description

Floating pollutant recovery device and floating pollutant recovery system Technical Field The present application relates to a floating contaminant recovery device and a floating contaminant recovery system for recovering floating contaminants from environmental water. The present application claims priority based on japanese patent application No. 2020-17688 invented in japan at 10 months 21 in 2020, and the contents thereof are incorporated herein. Background Ballast water used for cargo ships, tankers, and the like to maintain the attitude and draft of the ship body in a safe state causes disturbance of the marine ecosystem due to the overseas transport of harmful aquatic organisms, and is a serious environmental problem. As a technique for discharging water by making the aquatic organisms in ballast water equal to or less than a certain standard, for example, patent literature 1 exists. Patent document 1 describes that, by a ballast water filtration treatment apparatus constituted by a module independent of the structure of a ballast water treatment system, not only primary filtration is performed when pressurized load is carried out by which backwash water can be discharged to the outside of a ship, but also secondary filtration and backwash for differential pressure elimination are performed when discharge of backwash water to the outside of the ship is not possible, whereby the final filtration rate of marine microorganisms can be improved. Patent documents 2 and 3 disclose techniques for obtaining aquatic organisms from the obtained environmental water. For example, patent document 2 discloses a system for sampling ballast water of a ship, which can easily and continuously collect ballast water without providing a large storage tank and sample aquatic organisms contained in the ballast water in a living state. Patent document 3 describes a microbial concentrator in which a filter for storing sample water is disposed so as to separate a water storage portion of the sample water into a supply side and a discharge side, and a force directed downward in a vertical direction is not applied to a surface of the supply side, whereby microorganisms can be recovered in a living state without being greatly damaged. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2018-153795 Patent document 2 Japanese patent application laid-open No. 2009-115500 Patent document 3 Japanese patent application laid-open No. 2015-14516 Disclosure of Invention Problems to be solved by the invention Plastic pollution is a considerable part of ocean waste and becomes a serious threat. Particularly, it is an urgent problem to cope with marine pollution caused by floating pollutants including microplastic and the like. In the ship, a large amount of environmental water is taken and discharged as cooling water and ballast water, but floating pollutants contained in the environmental water are not effectively recovered and treated. The purpose of the present invention is to provide a floating pollutant recovery device and a floating pollutant recovery system that can efficiently recover floating pollutants from environmental water that is taken into a ship. Means for solving the problems The present invention relates to a suspended solids recovery device that is mounted on a ship and recovers suspended solids contained in environmental water taken into the ship, wherein the suspended solids recovery device is provided with a recovery filter that is disposed in a backwash drain line through which backwash drain water after backwashing the filter of a filter device that filters the environmental water flows, and a clear water supply mechanism that supplies clear water to the recovery filter. Preferably, the clean water supply mechanism has a clean water forward washing line connected to the upstream side of the recovery filter and supplying clean water to the recovery filter from the upstream side of the recovery filter. Preferably, the clean water supply mechanism includes a clean water backwash line connected to a downstream side of the recovery filter and supplying clean water to the recovery filter from the downstream side of the recovery filter, a clean water drain line that discharges backwash clean water obtained by backwashing the recovery filter and supplied from the clean water backwash line, and a recovery vessel that recovers backwash clean water flowing through the clean water drain line. Preferably, the floating contaminant recovery device further includes a separator that is disposed upstream of the recovery filter in the backwash drain line and separates solids contained in backwash drain flowing through the backwash drain line. Preferably, the filtration precision of the recovery filter is 200 μm to 800 μm. The present invention also relates to a floating contaminant recovery system that is mounted on a ship and recovers floating contaminants contained in environmental wate