CA1163142A - Vacuum plant for ships for the removal of polluted water - Google Patents
Vacuum plant for ships for the removal of polluted waterInfo
- Publication number
- CA1163142A CA1163142A CA000368477A CA368477A CA1163142A CA 1163142 A CA1163142 A CA 1163142A CA 000368477 A CA000368477 A CA 000368477A CA 368477 A CA368477 A CA 368477A CA 1163142 A CA1163142 A CA 1163142A
- Authority
- CA
- Canada
- Prior art keywords
- polluted water
- collecting container
- duct
- container
- vacuum plant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/008—Temporary fluid connections for emptying mobile sewage holding tanks, e.g. of trailers, boats
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
- Physical Water Treatments (AREA)
- Catching Or Destruction (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Vacuum plant for ships is disclosed for the removal of polluted water. A vacuum pump is connected at the suction side to the upper part of a collecting container in which collecting container a polluted water duct (with an inlet valve) opens out. The valve controls the suction of water and air to-gether into the collecting container through the duct. The duct debouches near the bottom of the collecting container after arriving there from a higher level.
The duct may enter the collecting container above or below the level at which it debouches.
Vacuum plant for ships is disclosed for the removal of polluted water. A vacuum pump is connected at the suction side to the upper part of a collecting container in which collecting container a polluted water duct (with an inlet valve) opens out. The valve controls the suction of water and air to-gether into the collecting container through the duct. The duct debouches near the bottom of the collecting container after arriving there from a higher level.
The duct may enter the collecting container above or below the level at which it debouches.
Description
~ ~L631~2 BACKGROUND OF ~HE INVEN~ION
.
The invention rela-tes -to a vacuum plant for ships, for -the removal of pollu-ted water. In known plant a vacuum pump is connected to a collecting container at the suction side, one or more polluted water ducts (with inlet valves) opening ou-t into this collect-ing container, the said valves controlling the suction of polluted water and air into the ducts and into the collecting container.
Vacuum plan-ts for the removal of polluted water are suitable for ships because they allow freedom in the layout of the ducts. ~he design and layout of the duc-ts can take into account the particular spatial conditions prevailing in the given instance; there is no need -to produce a pressure head; and smaller duc-t cross-sections can be used. Vacuum plants for the removal of polluted water of the kind in question are described, for example, in German Patent Specification No. 1,238,858 and in German laid-open Specifica-tion No. 24 55 551.
As correct operation of the vacuum plan-t for -the removal of pol-luted water depends, inter alia, on the vacuum level prevailing in the system, both the vacuum pump and also the polluted water ducts have hitherto been connected to the collecting container above the highes-t possible water level, so that the suction side of the vacuum pump was in direct communication with the polluted water ducts above -the space in the collecting container and above the water level in this container. However, no attention was devoted to the aeration of the polluted wa-ter~ Attention was merely devoted to the question of maintaining as small as possible the flow resistance between the vacuum pump and the polluted water ducts and also to the question of precluding the chances of back-, ~ ~63~2 .
` flow. When, as is fre~uently the case on ships, the polluted water, containing faeces, has been passed to a clarification plant, a special aeration process took place, by means of compressed air and in conjunction with the clarification process1 for the purpose of promoting -the aerobic decomposition procedllres. However, this aera-tion did not affect those coarser solid componen-ts of the polluted water which were retained, for example by sieves, before the clarification plant, and which were then separated from the polluted water.
SUMMARY OF THE INVE~r~IO~
; Underlying this invention is the object of providing a vacuum plant, which serves for the removal of ~; polluted water and which is of the kind defined at the ; 15 outset of this specification, in which aeration of the polluted water is appreciably improved withou-t entailing additional expense. It is proposed according -to the invention and for realising -this object, that the polluted water duct shall arrive from a higher level and -then open 20 out near the bottom of the collecting container.
As a result of this provision, proposed according -to -the invention, the air, which is suctioned by way of the polluted water duct and which is in the form of bubbles, must "bubble through" the volume of polluted 25 water present in the collecting container before this air :,.
is sucked ou-t of the collecting container by way of the vacuum pump. Accordingly, there is achieved, in the s collecting con-tainer itself, not only strong turbulence, particularly of the sediment, but also continuous aera-` ~0 tion of the polluted wa-ter in the collecting container.
The water receives air in dissolved form, and air bubbles continue to adhere to the constituents of the polluted water. The desired aerobic decomposition processes :
start to take place immediately; indeed, these decomp-. ~
, ,' ~163t~2 osition processes take place at all the components of the polluted water removed from the collection points includ-ing those components which are not directly passed, in the ship, to a clarification plant.
~ 5 In dependence on the par-ticular design of the ; clarification plant communicating with the vacuum plant for the removal of pollu-ted water it is possible, when the provisions of the present invention are adopted, either to reduce the separate aeration process, which has hitherto been carried out in the plant for the removal of polluted water, or possibly to dispense with this aera-tion process completely.
With regard -to the operation of the vacuum plant for the removal of polluted water, it has surprisingly ' 15 been found that the operation of this plant for the ` removal of polluted water has even been improved by means of the invention. ~he additional flow resistance, presented at the collecting container by the modification to the duc-ting layout, or the loss in pressure, cost practically no energy, as, on account of the relatively short length of the polluted water ducts on a ship, the ; suction force - hitherto present at the inlet valve, ;~ through which the polluted water, which accumulated at ! : toilets and at other collection points for the polluted water, was sucked into the vacuum ducting system - was so - great that even when the inle-t valves were opened only for a very short period of time, larger quantities of air than were necessary were suctioned in the normal case, and the suction flow was so powerful that it produced undesirably loud noises. In this respect 9 when the provisions of the present invention are adopted, the water, through which the air has to flow and which is present in the collecting container and in the end of the polluted water duct, presents a resistance which is . ~
~ ~314~
altogether of benefit and which somewhat reduces the power of the reactions o~ the plant when an inlet valve is opened for a short period of -time.
It is also feasible, as an alternative to -the inventive proposal, to arrange for all the polluted water duc-ts to be connected to the collecting container at the upper portion of the lat-ter and, in the course of the further pa-th of travel of the polluted water, to thrust the air, expelled from the pressure side of the vacuum pump, through the polluted water after the collecting container. However, this procedure would entail the drawback of a decreased efficiency, as vacuum pumps should, insofar as is possible, not operate with counterpressure.
BRIEF D~SCRIP~IO~ OF l'HE DRAWINGS
-Embodiments of the inven-tion are described below with reference to the accompanying schematic drawings, in which:-Fig. 1 illustrates a first embodiment, wi-th a polluted water duct which en-ters a collecting container from above the latter; and Fig. 2 illustra-tes an embodiment with a polluted water duct which is connec-ted to the bottom of the collecting container and enters the latter from below after descending from a higher level.
D~AILED D~SCRIP~IO~ OF THE PREF~RRED ~MBODIME~S
~ oth Fig. 1 and Fig. 2 only show the collecting container, designated as 10, of a vacuum plant for the removal of polluted water, this vacuum plant being installed on a ship and having a single polluted water duct 12. It is to be understood that a number of ducts may be branched onto the duct 12 for the purpose of leading polluted water -to the collecting container from a number of toile-ts and other points from which the polluted water is collected. Alternatively, a number of polluted , ~ ~3i~2 . .
. ., ` water ducts 12 could individually lead to the collecting container 10~ ~or the sake of simplicity, in the embodi-ment shown in ~ig. 1 only a single toilet 14 is shown, an inlet valve 16 being arranged from this toilet 14. ~he ac-tuation of the inlet valve 16 may take place automatic-ally by means of the underpressure present in the system, when a certain quanti-ty of polluted water has accumulated upstream of the valve. ~he inlet valve 16 may be so ~ controlled that, each time the valve opens, a specified i 10 amount of polluted water - and, also, a specified volume of air, which should be a multiple of the quantity of polluted water - is admitted into the polluted water duct 12 before the valve automatically re-closes. With reference to the con-trol of the inlet valve 16 reference is made to German laid-open Specification ~o. 24 55 551, referred to earlier in this specification. Instead of the sys-tem whereby the inle-t valve 16 opens automatically, i-t is also possible, as is known in the case of vacuum toilets, to provide an opening mechanism which can be actuated at will; however, it is also preferable if the ; opening dura-tion can be adjusted to a fixed value so as to prevent losses occurring through the inlet valve being open too long.
:~.
~he underpressure in the collecting container 10 and in the network of polluted water ducts 12 is produced by a vacuum pump 18 and is maintained during operation of the plant for the removal of polluted water. ~he under-pressure causes the polluted water, which has been admitted into the duct system by the inlet valve 16, and also the air which has been admitted, to be sucked into j the collecting container 10. Whereas the air is immed-;; iately removed from the collecting con-tainer 10 by the vacuum pump 18, the polluted water accumulates, and thus attains a greater volume in the collecting container 10, before it is pumped out of the collecting container 10 by :
;
.
:; .
, . .
.,. ~
~,. . .
,, ~ 1~3142 one or more conven-tional polluted water pumps (not shown), and is passed to (for example) a clarification plant.
A clarification plant of this kind usually has a number of stages in which take place, for example, the successive steps of primary clarification, aera-tion, biological purification, and secondary clarification. Conveniently, a sieve is arranged upstream of the polluted water pump, which also serves to comminute the solid components of the polluted water, this sieve retaining the coarser compon-ents of the polluted water, so that these coarser compon-en-ts can be removed from the water.
As is clear from Fig. 1, the polluted water duct 12 leads, from above, into the polluted water container 10, which is completely closed and kept under vacuum, this duct 12 -terminating close to the bottom of the collecting container and below the wa-ter level of the latter. ~he underpressure produced by the vacuum pump 18 is propagated to the polluted water duc-t 12 through the pollu-ted wa-ter present in the collecting container 10 When the inlet valve 16 is closed there is hardly any difference between the underpressure in the polluted water duct 12 and in the upper area of the collec-ting container 10 above the water level in the latter. Consequently, the water level is almost the same in the foremost end of the duct 12 and in the collecting container 10.
~ he arrangement, shown in Fig. 1, of the down-stream end of the polluted wa-ter duct 12 relative to the collecting container 10 is such that the suctioned air must pass the volume of water present in the collecting container 10 before this air can be removed, by suction, by -the vacuum pump 18. A guide and distribution device 20 may be provided for effecting a better dis-tribution of the air in the polluted water contained in the collecting container 10. In the embodiment shown in Fig. 1 this ~ 1~31~2 device 20 has the form of a flange which is located at the end of the duct 12 and which surrounds -the la-tter.
~his flange may possibly also be perforated.
It may be recommendable to arrange for that part of the polluted water duct 12 which debouches into the collecting container 10 - polluted water thus being present in this particular part of the polluted water duct 12 - to be of greater cross-section th~n the remaining part of the polluted water duct 12; in this w~y it is possible to reduce the flow resistance pres-ented to the air by the water contained in the downstream end of the duct 12. ~his is illustrated in ~ig. 2.
As is readily apparent from Fig. 1, the down-stream end of the polluted water duct 12, which extends downwardly into the collecting container 10, does no-t have to be in the form of a tube or hose. ~hus, the collecting con-tainer 10 may, by the shape given to it, ;itself form the downstream end of the polluted water duc-t 12. ~or example, this modification may be such that a partition wall extends transversely through the collecting container and runs from the upper closure wall -to a point lying close to the bottom of the collecting container, the polluted water duct 12 debouching on one side~of this partition wall within the upper closure ; -25 wall of the collecting container, while the vacuum pump `18 is connected to the collecting container on the opposite side of the partition wall~ If this modifica-tion is adopted the air arriving from the polLuted water duct 12 will be sucked, under the partition wall, through ~30 the water contained in the collecting container 10.
~ he embodiment shown in ~ig. 2 differs from that shown in ~ig. 1 in that the polluted water duct 12 passes to the inner region of the collecting container, close -to the bottom of this collecting container, outside the ~' .
.
~ ~314~
., collecting container 10 and, agaln, leads to this point . from above the maximum water level in the collecting .. container. ~he construction and arrangeme:nt of the s remaining part of the polluted water duct are of no ' 5 significance for the purposes of the invention. In this i respect use may be made of experience hitherto gained, wi-th alternately rising and descending duct sections.
r:
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;' ~
i ~
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~,., ~ .
,~
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,:
'.''~;
'' r' , ~ _9_ .,
.
The invention rela-tes -to a vacuum plant for ships, for -the removal of pollu-ted water. In known plant a vacuum pump is connected to a collecting container at the suction side, one or more polluted water ducts (with inlet valves) opening ou-t into this collect-ing container, the said valves controlling the suction of polluted water and air into the ducts and into the collecting container.
Vacuum plan-ts for the removal of polluted water are suitable for ships because they allow freedom in the layout of the ducts. ~he design and layout of the duc-ts can take into account the particular spatial conditions prevailing in the given instance; there is no need -to produce a pressure head; and smaller duc-t cross-sections can be used. Vacuum plants for the removal of polluted water of the kind in question are described, for example, in German Patent Specification No. 1,238,858 and in German laid-open Specifica-tion No. 24 55 551.
As correct operation of the vacuum plan-t for -the removal of pol-luted water depends, inter alia, on the vacuum level prevailing in the system, both the vacuum pump and also the polluted water ducts have hitherto been connected to the collecting container above the highes-t possible water level, so that the suction side of the vacuum pump was in direct communication with the polluted water ducts above -the space in the collecting container and above the water level in this container. However, no attention was devoted to the aeration of the polluted wa-ter~ Attention was merely devoted to the question of maintaining as small as possible the flow resistance between the vacuum pump and the polluted water ducts and also to the question of precluding the chances of back-, ~ ~63~2 .
` flow. When, as is fre~uently the case on ships, the polluted water, containing faeces, has been passed to a clarification plant, a special aeration process took place, by means of compressed air and in conjunction with the clarification process1 for the purpose of promoting -the aerobic decomposition procedllres. However, this aera-tion did not affect those coarser solid componen-ts of the polluted water which were retained, for example by sieves, before the clarification plant, and which were then separated from the polluted water.
SUMMARY OF THE INVE~r~IO~
; Underlying this invention is the object of providing a vacuum plant, which serves for the removal of ~; polluted water and which is of the kind defined at the ; 15 outset of this specification, in which aeration of the polluted water is appreciably improved withou-t entailing additional expense. It is proposed according -to the invention and for realising -this object, that the polluted water duct shall arrive from a higher level and -then open 20 out near the bottom of the collecting container.
As a result of this provision, proposed according -to -the invention, the air, which is suctioned by way of the polluted water duct and which is in the form of bubbles, must "bubble through" the volume of polluted 25 water present in the collecting container before this air :,.
is sucked ou-t of the collecting container by way of the vacuum pump. Accordingly, there is achieved, in the s collecting con-tainer itself, not only strong turbulence, particularly of the sediment, but also continuous aera-` ~0 tion of the polluted wa-ter in the collecting container.
The water receives air in dissolved form, and air bubbles continue to adhere to the constituents of the polluted water. The desired aerobic decomposition processes :
start to take place immediately; indeed, these decomp-. ~
, ,' ~163t~2 osition processes take place at all the components of the polluted water removed from the collection points includ-ing those components which are not directly passed, in the ship, to a clarification plant.
~ 5 In dependence on the par-ticular design of the ; clarification plant communicating with the vacuum plant for the removal of pollu-ted water it is possible, when the provisions of the present invention are adopted, either to reduce the separate aeration process, which has hitherto been carried out in the plant for the removal of polluted water, or possibly to dispense with this aera-tion process completely.
With regard -to the operation of the vacuum plant for the removal of polluted water, it has surprisingly ' 15 been found that the operation of this plant for the ` removal of polluted water has even been improved by means of the invention. ~he additional flow resistance, presented at the collecting container by the modification to the duc-ting layout, or the loss in pressure, cost practically no energy, as, on account of the relatively short length of the polluted water ducts on a ship, the ; suction force - hitherto present at the inlet valve, ;~ through which the polluted water, which accumulated at ! : toilets and at other collection points for the polluted water, was sucked into the vacuum ducting system - was so - great that even when the inle-t valves were opened only for a very short period of time, larger quantities of air than were necessary were suctioned in the normal case, and the suction flow was so powerful that it produced undesirably loud noises. In this respect 9 when the provisions of the present invention are adopted, the water, through which the air has to flow and which is present in the collecting container and in the end of the polluted water duct, presents a resistance which is . ~
~ ~314~
altogether of benefit and which somewhat reduces the power of the reactions o~ the plant when an inlet valve is opened for a short period of -time.
It is also feasible, as an alternative to -the inventive proposal, to arrange for all the polluted water duc-ts to be connected to the collecting container at the upper portion of the lat-ter and, in the course of the further pa-th of travel of the polluted water, to thrust the air, expelled from the pressure side of the vacuum pump, through the polluted water after the collecting container. However, this procedure would entail the drawback of a decreased efficiency, as vacuum pumps should, insofar as is possible, not operate with counterpressure.
BRIEF D~SCRIP~IO~ OF l'HE DRAWINGS
-Embodiments of the inven-tion are described below with reference to the accompanying schematic drawings, in which:-Fig. 1 illustrates a first embodiment, wi-th a polluted water duct which en-ters a collecting container from above the latter; and Fig. 2 illustra-tes an embodiment with a polluted water duct which is connec-ted to the bottom of the collecting container and enters the latter from below after descending from a higher level.
D~AILED D~SCRIP~IO~ OF THE PREF~RRED ~MBODIME~S
~ oth Fig. 1 and Fig. 2 only show the collecting container, designated as 10, of a vacuum plant for the removal of polluted water, this vacuum plant being installed on a ship and having a single polluted water duct 12. It is to be understood that a number of ducts may be branched onto the duct 12 for the purpose of leading polluted water -to the collecting container from a number of toile-ts and other points from which the polluted water is collected. Alternatively, a number of polluted , ~ ~3i~2 . .
. ., ` water ducts 12 could individually lead to the collecting container 10~ ~or the sake of simplicity, in the embodi-ment shown in ~ig. 1 only a single toilet 14 is shown, an inlet valve 16 being arranged from this toilet 14. ~he ac-tuation of the inlet valve 16 may take place automatic-ally by means of the underpressure present in the system, when a certain quanti-ty of polluted water has accumulated upstream of the valve. ~he inlet valve 16 may be so ~ controlled that, each time the valve opens, a specified i 10 amount of polluted water - and, also, a specified volume of air, which should be a multiple of the quantity of polluted water - is admitted into the polluted water duct 12 before the valve automatically re-closes. With reference to the con-trol of the inlet valve 16 reference is made to German laid-open Specification ~o. 24 55 551, referred to earlier in this specification. Instead of the sys-tem whereby the inle-t valve 16 opens automatically, i-t is also possible, as is known in the case of vacuum toilets, to provide an opening mechanism which can be actuated at will; however, it is also preferable if the ; opening dura-tion can be adjusted to a fixed value so as to prevent losses occurring through the inlet valve being open too long.
:~.
~he underpressure in the collecting container 10 and in the network of polluted water ducts 12 is produced by a vacuum pump 18 and is maintained during operation of the plant for the removal of polluted water. ~he under-pressure causes the polluted water, which has been admitted into the duct system by the inlet valve 16, and also the air which has been admitted, to be sucked into j the collecting container 10. Whereas the air is immed-;; iately removed from the collecting con-tainer 10 by the vacuum pump 18, the polluted water accumulates, and thus attains a greater volume in the collecting container 10, before it is pumped out of the collecting container 10 by :
;
.
:; .
, . .
.,. ~
~,. . .
,, ~ 1~3142 one or more conven-tional polluted water pumps (not shown), and is passed to (for example) a clarification plant.
A clarification plant of this kind usually has a number of stages in which take place, for example, the successive steps of primary clarification, aera-tion, biological purification, and secondary clarification. Conveniently, a sieve is arranged upstream of the polluted water pump, which also serves to comminute the solid components of the polluted water, this sieve retaining the coarser compon-ents of the polluted water, so that these coarser compon-en-ts can be removed from the water.
As is clear from Fig. 1, the polluted water duct 12 leads, from above, into the polluted water container 10, which is completely closed and kept under vacuum, this duct 12 -terminating close to the bottom of the collecting container and below the wa-ter level of the latter. ~he underpressure produced by the vacuum pump 18 is propagated to the polluted water duc-t 12 through the pollu-ted wa-ter present in the collecting container 10 When the inlet valve 16 is closed there is hardly any difference between the underpressure in the polluted water duct 12 and in the upper area of the collec-ting container 10 above the water level in the latter. Consequently, the water level is almost the same in the foremost end of the duct 12 and in the collecting container 10.
~ he arrangement, shown in Fig. 1, of the down-stream end of the polluted wa-ter duct 12 relative to the collecting container 10 is such that the suctioned air must pass the volume of water present in the collecting container 10 before this air can be removed, by suction, by -the vacuum pump 18. A guide and distribution device 20 may be provided for effecting a better dis-tribution of the air in the polluted water contained in the collecting container 10. In the embodiment shown in Fig. 1 this ~ 1~31~2 device 20 has the form of a flange which is located at the end of the duct 12 and which surrounds -the la-tter.
~his flange may possibly also be perforated.
It may be recommendable to arrange for that part of the polluted water duct 12 which debouches into the collecting container 10 - polluted water thus being present in this particular part of the polluted water duct 12 - to be of greater cross-section th~n the remaining part of the polluted water duct 12; in this w~y it is possible to reduce the flow resistance pres-ented to the air by the water contained in the downstream end of the duct 12. ~his is illustrated in ~ig. 2.
As is readily apparent from Fig. 1, the down-stream end of the polluted water duct 12, which extends downwardly into the collecting container 10, does no-t have to be in the form of a tube or hose. ~hus, the collecting con-tainer 10 may, by the shape given to it, ;itself form the downstream end of the polluted water duc-t 12. ~or example, this modification may be such that a partition wall extends transversely through the collecting container and runs from the upper closure wall -to a point lying close to the bottom of the collecting container, the polluted water duct 12 debouching on one side~of this partition wall within the upper closure ; -25 wall of the collecting container, while the vacuum pump `18 is connected to the collecting container on the opposite side of the partition wall~ If this modifica-tion is adopted the air arriving from the polLuted water duct 12 will be sucked, under the partition wall, through ~30 the water contained in the collecting container 10.
~ he embodiment shown in ~ig. 2 differs from that shown in ~ig. 1 in that the polluted water duct 12 passes to the inner region of the collecting container, close -to the bottom of this collecting container, outside the ~' .
.
~ ~314~
., collecting container 10 and, agaln, leads to this point . from above the maximum water level in the collecting .. container. ~he construction and arrangeme:nt of the s remaining part of the polluted water duct are of no ' 5 significance for the purposes of the invention. In this i respect use may be made of experience hitherto gained, wi-th alternately rising and descending duct sections.
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Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Vacuum plant, for ships, for the removal of polluted water, comprising a collecting container whose upper part can be connected to the suction side of a vacuum pump, in which collect-ing container one or more polluted water ducts with inlet valves open, said inlet valves controlling the suction of polluted water and air together into the duct and into the collecting container, the polluted water debouching near the bottom of the collecting container after arriving there from a higher level so that the polluted water in the container will be intermittently aerated by air sucked into the container, from time to time, by the operation of the inlet valves.
2. Vacuum plant as claimed in claim 1, wherein the polluted water duct passes through the bottom of the collecting container.
3. Vacuum plant as claimed in claim 1, wherein the polluted water duct passes into the collecting container from above or laterally, and terminates in the vicinity of the bottom of the collecting container.
4. Vacuum plant as claimed in any one of claims 1 to 3, wherein that part of the polluted water duct which debouches into the collecting container is of greater cross-section than the remaining part of the polluted water duct.
5, Vacuum plant as claimed in any one of claims 1, or 2, or 3, comprising a fixed or movable guide and distribution device in the collecting container, this device being used to guide and distribute the inwardly suctioned air.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3001229A DE3001229C2 (en) | 1980-01-15 | 1980-01-15 | Vacuum drainage system for ships |
| DEP3001229.4 | 1980-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1163142A true CA1163142A (en) | 1984-03-06 |
Family
ID=6092075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000368477A Expired CA1163142A (en) | 1980-01-15 | 1981-01-14 | Vacuum plant for ships for the removal of polluted water |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS56105787A (en) |
| CA (1) | CA1163142A (en) |
| DE (1) | DE3001229C2 (en) |
| FI (1) | FI68024B (en) |
| FR (1) | FR2473459A1 (en) |
| GB (1) | GB2068468B (en) |
| NL (1) | NL8100108A (en) |
| NO (1) | NO148878C (en) |
| SE (1) | SE8100185L (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4623452A (en) * | 1985-09-17 | 1986-11-18 | Petersen Robert N | Dockside system for the collection and disposal of bilge water and waste oil |
| FI108937B (en) * | 1999-03-10 | 2002-04-30 | Evac Int Oy | Vacuum Toilet Device |
| DE10011627C1 (en) * | 2000-03-10 | 2001-10-25 | Gerd Grass | Drive device for stair lifts |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE27214C (en) * | G. STUMPF in Berlin SW., Ritterstrafse 61 | Facility for lifting faeces | ||
| DE1238858B (en) * | 1956-05-08 | 1967-04-13 | Sven Algot Joel Lijendahl | Arrangement for the discharge of toilet waste from houses |
| SE389882B (en) * | 1975-04-23 | 1976-11-22 | Ifoe Ab | DEVICE AT VACUUM CLOSET WITH COLLECTION CONTAINER |
| SE409480B (en) * | 1977-12-14 | 1979-08-20 | Electrolux Ab | WAY TO TRANSPORT WASTEWATER BY VACUUM |
-
1980
- 1980-01-15 DE DE3001229A patent/DE3001229C2/en not_active Expired
- 1980-12-30 FI FI804060A patent/FI68024B/en not_active Application Discontinuation
-
1981
- 1981-01-07 GB GB8100379A patent/GB2068468B/en not_active Expired
- 1981-01-12 FR FR8100693A patent/FR2473459A1/en not_active Withdrawn
- 1981-01-12 NL NL8100108A patent/NL8100108A/en not_active Application Discontinuation
- 1981-01-14 SE SE8100185A patent/SE8100185L/en not_active Application Discontinuation
- 1981-01-14 JP JP327981A patent/JPS56105787A/en active Pending
- 1981-01-14 CA CA000368477A patent/CA1163142A/en not_active Expired
- 1981-01-14 NO NO810107A patent/NO148878C/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI68024B (en) | 1985-03-29 |
| GB2068468B (en) | 1984-06-13 |
| NO810107L (en) | 1981-07-16 |
| JPS56105787A (en) | 1981-08-22 |
| FI804060L (en) | 1981-07-16 |
| NO148878C (en) | 1984-01-11 |
| DE3001229A1 (en) | 1981-07-23 |
| SE8100185L (en) | 1981-07-16 |
| GB2068468A (en) | 1981-08-12 |
| NL8100108A (en) | 1981-08-17 |
| DE3001229C2 (en) | 1983-01-13 |
| FR2473459A1 (en) | 1981-07-17 |
| NO148878B (en) | 1983-09-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |