FR2565930A1 - WATER EXHAUST APPARATUS USED FOR CLEANING OF CALES FUNDS - Google Patents

Abstract

THE INVENTION RELATES TO THE DRAINAGE OF THE CLEANING WATER FROM THE WEDGES. THE CALES 9 OF A SHIP CONTAIN BOTTOMS 8 OF CALES WHICH COLLECT THE WATER FROM THE WASHING OF THE CALES, HAVING RESTRICTED RESIDUES SUCH AS COAL PARTICLES, ORE, ETC. THE WATER AND THE REMAINS ARE ASPIRED BY EJECTORS 13 PLACED UNDER EACH BED, AND BY A MAIN EJECTOR 16. ACCORDING TO THE INVENTION, A CONNECTING PIPE 24 IS FITTED BETWEEN A BALLAST WATER SUPPLY PIPE 2 AND THE PIPING 15 CLEANING WATER DRAIN, SO THAT THE CURRENT SPEED IS INCREASED IN THIS PIPING AND PREVENTS CLOGGING. APPLICATION TO THE CLEANING OF SHIPS.

Description

t

  The present invention relates to an apparatus for evaluating

  cleaning waste water containing residues after cleaning a set of holds of a bulk transport vessel, the apparatus preventing the precipitation of these remains contained in the used cleaning water when the shims were cleaned, by circulation in a main draining sewage cleaning pipe

  and towards the bottom of this piping.

  In a cargo bulk cargo ship such as coal, ores, steel scrap and cereals, the holds are cleaned with seawater and the like after unloading the bulk cargo. Sewage cleaning water contains a considerable amount of remains such as ore particles, coal particles or small particles.

scrap pieces.

  A first conventional apparatus for discharging the waste water from the ship outwards when the holds have been cleaned, the water containing a considerable amount of remains, is described below with reference to the drawings. FIG. 1 is a schematic plan view of this first conventional apparatus, FIG. 2 is a view of this first conventional apparatus with torn parts, and FIG.

  schematic of Figure 2 along the line A-A.

  As shown in Figures 1 to 3, a pipe

  main land 2 ballast water supply,

  having a main valve 3, introduces the ballast water

  several bypass piping having

  respective secondary valves 4, connected to the pipe

  main land 2 ballast water supply, to several tanks 1 formed in a double bottom of the ship. A main pump 6 transmits the ballast water sucked by a suction port 7 of water

  several tanks 1 through the

  It also transmits the ballast water sucked in as a motive water to a nozzle of a main ejector described below.

of this memoir.

  Several tanks 8 of bilges are dis-

  two 9A of each of the holds 9. The waste water 11 cleaning, when the wedges 9 were cleaned, containing a considerable amount of

  such as ore particles, particulates

  cules of coal or small pieces of scrap, circulates through each of the openings 12 formed at a rate of two each at the bottom 9A of each hold 9, to the

  respective tanks holds 9 which retain them.

  Several secondary ejectors 13 for

  vacuum cleaning wastewater stored in

  8 tanks are arranged at a rate of two under each of the shims 9. A suction port 13a of each of

  secondary ejectors 13 is connected to a lower part

  each tank 8, and an evacuation port 13B

  each of the secondary ejectors 13 is connected to a main sewage discharge pipe

  cleaning, described later in this memo.

  The waste water 11 of cleaning contained in each of the tanks 8 is sucked from the suction port 13A of each secondary ejector 13 under the action of water ejected at high speed at the end of the nozzle 14 of each of the secondary ejectors 13, and it is evacuated by

  the orifice 13B of each of the ejectors 13 to the pipe

  main wastewater disposal area.

  The above-mentioned main wastewater discharge pipe 15 collects the waste water 15 sucked by each of the secondary ejectors 13 and thus flows to an outlet end 15A of this piping.

main evacuation.

  The aforementioned main ejector 16 sucks water

  spent cleaning in the main piping

  15 evacuation so that he evacuates it outside

  of the ship. A suction port 16A of the main ejector

  16 is connected by a main valve 17 to the ori-

  15A output of the main pipe 15, and the main ejector 16 has a discharge port 16B

  used cleaning water outside the ship.

  A nozzle 18 of the main ejector 16 is connected to the main pump 6 by a driving water supply pipe 20 having a valve 19. The cleaning waste water 11 flowing in the main drainage pipe 15 is sucked from the orifice 16A of the main ejector 16 under the action of water ejected at high speed by the main pump 6 from the tip of the nozzle 18 of the main ejector 16, and it is evacuated outside the ship from

  the orifice 16B of the main ejector 16.

  In this first conventional apparatus mentioned above,

  ballast water is transferred to the various reservoirs

  see 1 in the following manner. The valve 19 of the supply water pipe 20 is closed

  while the main valve 3 of the main piping

  supply blade 2 and the secondary valve 4 of

  each of the branch pipes 5 connected to the pipe

  main feeder 2 are open, and the main pump 6 is turned on. Thus, the ballast water sucked by the suction port 7 of the main pump 6 is transmitted to the various tanks

  1 of ballasting through the main supply pipe 2

  and the corresponding derived piping 5.

  In the first conventional apparatus mentioned above, the used cleaning water of the various shims 9 and containing a considerable quantity of residues 10 is discharged outside the vessel in the following manner. The driving water is transmitted to the nozzle 14 of each of the secondary ejectors 13 by another pump (not shown) so that the waste water 11 containing residues 10 and which is stored in each of the tanks 8, is sucked up and discharged into the main pipe 15 wastewater discharge. On the other hand, the main valve 3 of the ballast water supply pipe 2 is closed while the valve 19 of the driving water supply pipe and the main valve 17 of the main drainage pipe 15 are open, and the main pump 6 is started. As a result, the ballast water sucked by the suction port 7 of the main pump 6 is transmitted in the form of motive water to the nozzle 18 of the main ejector 16 via the piping 20. food. Thus, the cleaning wastewater stuck in the main discharge pipe 13 of the secondary ejectors 13 is evacuated outside the vessel with the aid of the main ejector 16, from the port 16B. evacuation of it, under the action of water

  projected at high speed at the end of the ejector nozzle 18

principal 16.

  However, the first aforesaid apparatus of conventional type poses the following problems. Each of the secondary ejectors 13 has the advantage of not risking

  to show a malfunction due to its structural

  ture and the absence of a rotating part. Each of the secondary ejectors 13 may, however, suck only a part of the remains 10 contained in the waste water 11, precipitating at the bottom of each of the tanks 8, because the force

  suction is lower than that of an ordinary pump.

  In addition, the remains 10 sucked by the secondary ejectors

  Drains 13 precipitate at the bottom of the main piping 1-5 discharge and thus block this pipe 15, which can make it impossible to evacuate the wastewater 11

  cleaning outside the ship.

  We now consider a second conventional apparatus for discharging waste cleaning water containing residues, after cleaning the holds of a bulk cargo ship, with reference to Figure 4 which is a section with parts torn off from this second

classic device.

  As shown in Figure 4, several tanks 8 bilges are used as in the first conventional apparatus mentioned above two at the bottom 9A of each of the shims 9. Several hoppers 21 are placed at a rate of one per tank 8 Each hopper 21 is vertically fixed under each of two openings

  12 formed at the bottom 9A of each of the holds 9. An opening

  the bottom of each of the hoppers 21 is disposed opposite an evacuation orifice 8A formed in the bottom of

each of the tanks 8.

  Several secondary ejectors 13 intended to suck up the wastewater of cleaning kept in the tanks

  8 are placed at a rate of two under each of the holds 9.

  A suction orifice 13A of each of the secondary ejectors 13 is connected to the discharge orifice 8A of each tank 8 and a discharge or discharge port 13B of each of the secondary ejectors 13 is connected to a main pipe 15 of wastewater cleaning. A nozzle 14 of each of the secondary ejectors 13 is connected to the suction port 13A of each of these ejectors 13 by a piping 22 mounted bypass. The driving water transmitted to the nozzle 15 of each of the secondary ejectors 13 is ejected at high speed at the end of the nozzle 14 and, simultaneously,

  part of this motive water is ejected through the pipe

  Derived from the cleaning waste water 11 to the port 13A, in the same direction as the waste water stream 11 cleaning. The other structures of the second conventional apparatus are similar to those of the first

aforementioned conventional apparatus.

  In this second conventional apparatus, the waste water 11 for cleaning, when the shims 9 have been cleaned, the water containing residues 10, flows into the hopper 21 through each opening 12 at the rate of two at the bottom 9A of each shims 9. As described above, as the lower opening of each hopper 21 is turned in front of the discharge orifice 8A of each tank 8, the remains 10 contained in the cleaning waste water 11 flow from each hopper 21 directly to the orifice

  13A suction of each of the secondary ejectors 13.

  Under the action of the driving water ejected at high speed at the end of the nozzle 14 of each secondary ejector 13, the waste water 11 for cleaning containing the remains 10 is

  sucked to the suction port 13A of each of the ejects

  secondary cells and is evacuated through port 13B of

  these ejectors in the main drainage pipe 15

  waste water. As previously described, a part of the driving water transmitted to the nozzle 14 of each of the secondary ejectors 13 is projected by the branch pipe 22 into the cleaning waste water 11 sucked by the suction port 13A, in the same direction. As a consequence, the wastewater 11 for cleaning is discharged into the main pipe from the discharge orifice 13B of each secondary ejector 13, without the remains 10 of the waste water 11 does not plug the suction port 13A of each of the secondary ejector 13. In addition, as the remains 10 contained in the waste water 11 flow from each hopper 21 directly to the port 13A d '. suction of the ejectors 13, the remains 10 are almost completely sucked by the ejectors 13 without precipitation

  at the lower part of the vats 8.

  However, the second conventional apparatus mentioned above has the following problems. The remains 10 contained in the waste water 11 cleaning when the shims 9 have been cleaned, precipitate at the bottom of the main pipe 15 wastewater outlet and thus block this pipe 15, so that the evacuation of water

  worn 11 outside the ship may be impossible.

  In these circumstances, it is desirable to

  have a wastewater disposal device of net

  cleaning containing remains, after cleaning the holds of a bulk cargo ship, preventing the precipitation of the remains contained in the used cleaning water when it has cleaned the holds,

  water flowing through a main drainage pipe

  wastewater to the bottom of this pipe-

  main area, but such a device is not currently

well known.

  The invention therefore relates to an apparatus for discharging wastewater containing cleaning residues after the cleaning of the holds of a bulk transport vessel, allowing the removal of the precipitation of the remains contained in the wastewater after cleaning the holds,

  water flowing through a main drainage pipe

  wastewater, so the leftovers can not accumulate

  at the bottom of the main drainage pipe

  cuation. More specifically, the invention relates to a wastewater cleaning apparatus containing residues after cleaning the holds of a bulk cargo ship having a double bottom structure and having a main water supply pipe of ballasting which feeds several ballast tanks placed on the two sides of a ship, the apparatus comprising: a plurality of bilge tanks arranged, at least one at the bottom of each of the holds, with a plurality of secondary ejectors arranged at at least one below each of the holds, each ejector being intended to suck up the waste water containing residues after cleaning the holds, this water being kept in the tanks, a suction port of each of the ejectors secondary

  being connected to a lower part of a corresponding vessel

  a main drain for discharging waste water for collecting the water sucked by the secondary ejectors, with transmission of the water thus collected to an outlet end of

  the main drainage pipe, an evacuation

  or discharge of each of the secondary electors being connected to the main discharge pipe, and a main ejector for sucking the cleaning waste water flowing into the main drainage pipe so that it is discharged to the main drainage pipe. the outside of the vessel, a suction port of the main ejector being connected to the outlet end of the main discharge pipe of wastewater, the main ejector having an outlet or discharge port for discharging spent water outside the vessel, characterized in that a connecting pipe is disposed between an upstream end of the main discharge pipe of wastewater, given the direction of flow of the water used in the main drain piping, on the one hand, and the main ballast water supply piping on the other hand, so that part of the ballast water is introduced into the main piping of evacuation of wastewater

  through the main water supply piping

  in ballast water, the speed of the waste water flow flowing through the main piping

evacuation is thus increased.

  Other features and advantages of the invention will be better understood when reading the

  following description of examples of realization

  and with reference to the accompanying drawings in which, Figures 1 to 4 having already been described: Figure 5 is a schematic plan view of an embodiment of apparatus according to the invention for discharging waste water cleaning containing remains after cleaning the holds of a ship

bulk transport.

  In view of the foregoing considerations, studies have been carried out within the scope of the invention for the development of a wastewater cleaning apparatus containing residues after the cleaning of the holds of a ship transported in bulk, this device preventing the precipitation of the remains contained in the wastewater cleaning after cleaning the holds,

  water flowing through a main drainage pipe

  the remains can not accumulate at the bottom of this main drainage pipe. Consequently, it has been found according to the invention that the precipitation of the remains contained in the cleaning water on the bottom of the main drainage pipe could be avoided by increasing the flow rate of the wastewater cleaning when the holds have been cleaned, this water circulating in the piping

main evacuation.

  The invention is based on this discovery.

  More specifically, FIG. 5 is a view

  schematic plan of the apparatus according to the invention.

  This apparatus comprises a main pipe 2 of food

  in ballast water with a main valve

  3 blade that introduces, as in the first device

  conventional, ballast water in several pipe-

  4 bypassed and having secondary valves 4, connected to 19l main pipe 2 supply, the water reaching several reservoirs

  1 ballast forms in a double bottom of the ship.

  A main pump 6 transmits the ballast water sucked through an orifice 7 to several ballast tanks 1 through the main ballast water supply pipe 2 and bypass pipes, and transmits the water the ballast thus sucked in the form of driving water to a nozzle of a main ejector described below, the pump also supplying the main pipe 2 for supplying water sucked from ballast and a connecting pipe

  described below, joining a main piping

  wastewater discharge blade described in the following.

  Several tanks of bilges 8 are used

  as in the first conventional apparatus at the rate of two at the bottom of each hold 9. The used cleaning water, after the cleaning of the holds 9 and containing a considerable amount of remains such as particles of ore,

  particles of coal or small pieces of iron

  raille, flows through each opening (not shown) arranged at a rate of two at the bottom of each shim 9, to the respective tanks 8 which retain it. Several secondary ejectors 13 intended to suck the waste water stored in the tanks 8 are arranged, as in the first conventional apparatus,

  at the rate of two under each hold 9. A suction port

  Each ejector 13 is connected, as in the first conventional apparatus, to a lower part of each tank 8 and a discharge orifice of each ejector 13 is connected, as in the first apparatus.

  conventional, to the main drainage pipe de-

  written in the following. The wastewater cleaning retained by each tank 8 is sucked, as in the first embodiment, from the suction port of each secondary ejector 13, under the action of the driving water ejected at high speed by the end of the nozzle (not shown) of each ejector 13, with evacuation of the discharge or discharge orifice of each ejector 13 to the main discharge pipe

- waste water.

  The main cleaning wastewater discharge pipe 15 indicated above collects the water sucked by the secondary ejectors 13, as in the first conventional apparatus, and the water thus collected.

  is transmitted to an outlet end 15A of the pipe

main area of evacuation.

  The aforesaid main ejector 16 draws the wastewater, as in the first conventional apparatus, which circulates in the main drainage pipe 15 so that it is driven out of the vessel. A discharge port 16A of the main ejector 16 is connected by a main valve 17 to the outlet end 15A of the main discharge pipe 15, as in the first conventional apparatus, and the main ejector

  16, as in this apparatus, an orifice 16B for failure

  or disposal of used water outside the vessel. A nozzle 18 of the main ejector 16 is connected

  at the main pump 6 by a supply pipe 20

  driving water having a valve 19, as in the first conventional apparatus. The cleaning wastewater circulating in the main drainage pipe 15 is sucked, as in the first conventional apparatus, from the suction port 16A of the main ejector 16, under the action of the ejected driving water. high speed

  by the pump 6 at the end. of the nozzle 18 of the main ejector

  16, and is evacuated outside the ship by the

  16B discharge section of the main ejector 16.

  A connecting pipe 24 having a valve 23 is mounted between the upstream end 15B of the pipework

  evacuation, taking into account the direction of

  wastewater in the main drain pipe on the one hand and the main water supply pipe 2 on the other hand. Part of the ballast water is introduced into the main drainage pipe 15 via the main supply pipe 2 so that the flow rate of the waste water in the main drainage pipe 15 is increased, the remains contained by the wastewater cleaning can not precipitate at the bottom of the main pipe 15 evacuation. In the aforementioned embodiment of apparatus according to the invention, the ballast water is transmitted to the various tanks 1 of ballasting in the following manner. The valve 19 of the supply water supply pipe 20 and the valve 23 of the connection pipe 24 are closed while the main valve 3 of the main supply pipe 2 and the valve

  secondary 4 of each bypass piping 5,

  corded to the main supply pipe 2,

  are open, and the pump 6 is put into operation.

  Thus, the ballast water sucked by the suction port 7

  The main pump 6 is transferred to the various tanks 1 of ballast by the main piping

  2 ballast water supply and

  respective lands 5 mounted in shunt. In the embodiment of apparatus according to the invention, the waste water, after cleaning the wedges 9 and containing a considerable amount of residues, is

  evacuated outside the ship in the following manner.

  The driving or driving water is transmitted, as in the first conventional apparatus, to the nozzle of each

  secondary ejector 13 by another pump (not shown).

  felt) so that the waste water containing residues is sucked up, this water being kept in the tanks 8,

  then evacuated to the main drainage pipe.

  On the other hand, the main valve 3 of the main water supply pipe 2, the valve 19 of the water supply pipe 20

  motor, the main valve 17 of the main piping

  drain 15 and the valve 23 of the piping

  24 connections are open, while the secondary valve

  4 of each branched piping 5, connected to the main ballast water supply pipe 2, is closed, and the main pump 6 is turned on. As a result, some of the water

  ballast aspirated through port 7 of the main pump.

  blade 6 is transmitted, as motive water, to the nozzle 18

  of the main ejector 16 by the feed pipe 20

  driving water. and at the same time, the remainder of the sucked-up ballast water is passed to the main discharge pipe 15B through its upstream end 15B through the main pipe.

  2 supply and 24 piping connection.

  Thus, the wastewater of cleaning collected in the pipe-

  main drainage area by the secondary ejectors

  13 is discharged, with the ballast water transferred

  to the main drainage pipe 15 through

  main supply piping 2 and connecting piping 24 to the outside of the vessel, through the main ejector 16, from

  of the discharge or discharge port 16B of this

  ci, under the action of the driving water ejected at high speed at the end of the nozzle 18 of the ejector 16. As the speed of the wastewater cleaning that circulates in the main drainage pipe 15 is increased by the presence of the ballast water transmitted to the main discharge pipe 15 by the main supply pipe 2 and the connecting pipe 24,

  the remains containing the waste water can not

  piter at the bottom of the main drainage pipe.

  The device embodiment according to the invention

  described above is an application of the invention

  the first conventional apparatus shown in FIGS. 1 to 3. Of course, the invention also applies to the second conventional apparatus shown in FIG.

figure 4.

  According to the invention, the speed of the wastewater cleaning stream, after the cleaning of the holds of a bulk transport vessel, the water circulating in a main drainage pipe of waste water of

  cleaning is increased by introducing ballast water

  in the main sewage pipe cleaning system, so that the precipitation of

  remains contained in the wastewater, on the bottom of the pipe-

  main drainage area, can be avoided, and this piping can not get clogged, the device

  thus having useful industrial effects.

  Of course, various modifications may be made by those skilled in the art to the apparatuses which have just been described solely as non-limiting examples.

  without departing from the scope of the invention.

Claims (1)

CLAIM   Apparatus for discharging waste water containing residues, after cleaning the holds of a bulk cargo ship having a double-bottomed structure and having a main water supply pipe for ballast water for transmitting water ballast water with several ballast tanks placed on both sides of the vessel, the apparatus comprising: a plurality of bilge tanks (8) at least one at the bottom (9A) of each hold (9), a plurality of secondary ejectors (13) at least one under each of the shims (9), each ejector being intended to suck up the wastewater containing residues after cleaning the shims (9), this water being preserved in the bilge tanks (8), a suction port (13A) of each ejector (13)   being connected to a lower part of a corresponding vessel   wedge (8), a main pipe (15) for discharging wastewater for cleaning the waste water sucked by the secondary ejectors (13) and for transmitting the collected water to one end outlet (15SA) of the main discharge pipe of wastewater, an outlet (13B) of each of the secondary ejectors (13) being connected to the main pipe (15) of wastewater discharge, and a main ejector (16) for sucking waste cleaning water flowing through the main wastewater cleaning main pipe (15) - so that it is driven out of the vessel, an orifice suction nozzle (16A) of the main ejector (16) being connected to the outlet end (15A) of the main cleaning wastewater discharge pipe (15), the main ejector (16) having an orifice (16B) for discharging the waste water outside the vessel, characterized in that it comprises a a connecting pipe (24) placed between an upstream end (15B) of the main waste water discharge pipe (15), taking into account the direction of circulation of the waste water in the main pipe (15) of on the one hand, and the main ballast water supply pipe (2), on the other hand, so that a portion of the ballast water is introduced into the main piping.   vent (15) via the pipe   main land (2) of ballast water supply, so that the flow velocity of the waste water flowing through the main piping   (15) wastewater cleaning outlet is increased.