NL2027592B1 - Device and method for separating solids from wash-water exiting an exhaust gas cleaning system (egcs) - Google Patents

Device and method for separating solids from wash-water exiting an exhaust gas cleaning system (egcs) Download PDF

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Publication number
NL2027592B1
NL2027592B1 NL2027592A NL2027592A NL2027592B1 NL 2027592 B1 NL2027592 B1 NL 2027592B1 NL 2027592 A NL2027592 A NL 2027592A NL 2027592 A NL2027592 A NL 2027592A NL 2027592 B1 NL2027592 B1 NL 2027592B1
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Netherlands
Prior art keywords
filter unit
solids
secondary filter
water
conduit
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NL2027592A
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Dutch (nl)
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NL2027592A (en
Inventor
Johannes Maria Schrauwen Franciscus
Leo Evert Nijst Christiaan
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Wfu B V
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Priority to NL2027592A priority Critical patent/NL2027592B1/en
Priority to PCT/EP2022/053661 priority patent/WO2022175258A1/en
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Publication of NL2027592B1 publication Critical patent/NL2027592B1/en

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A device for separating solids comprising soot, ash, exhaust gas particles and condensed oil residue from wash-water exiting an Exhaust Gas Cleaning System (EGCS). The device uses a primary 5 filter unit that connects with a wash-water outlet of the EGCS. The primary filter unit exits solids separated therein to a secondary filter unit. The secondary filter unit exits filtered wash-water and solids separated from the wash-water in the secondary filter unit. The deVice is also equipped with a pumping unit provided between the primary and secondary filter unit, and configured for pumping the solids separated from the wash-water in the primary filter unit through the second 10 conduit to the secondary filter unit. A sludge storage container is used to collect the solids exiting from the secondary filter unit. The deVice allows to significantly reducing the amount of solids released into the seawater, as typically occurs with an open loop EGCS.

Description

DEVICE AND METHOD FOR SEPARATING SOLIDS FROM WASH-WATER EXITING AN EXHAUST GAS CLEANING SYSTEM (EGCS)
TECHNICAL FIELD The present invention concerns a device and method for separating solids comprising soot, ash, exhaust gas particles and condensed oil residue from wash-water exiting an Exhaust Gas Cleaning System (EGCS). In particular, the invention concerns a device and method for separating said solids from wash-water exiting an EGCS on a vessel, for instance a seagoing vessel.
BACKGROUND ART Exhaust Gas Cleaning System (EGCS) are frequently used on vessels as a possible solution to meet the requirements of the IMO regulations to reduce ship-sourced Sulphur oxides (SO) emissions. An EGCS may for instance comprise a scrubber that is typically placed in an engine exhaust, such as a chimney, of a vessel. By contacting the exhaust gases with sea or fresh water containing suitable chemicals for scrubbing in the scrubber, the sulphur content in the exhaust gases may be reduced to applicable fuel oil Sulphur limits. The wash-water exiting from the EGCS is discharged over-board. The solids exiting from the EGCS are separated from the wash water and may be collected in a sludge tank provided on-board. The sludge is typically processed off-line, preferably on-shore, using well-known methods.
The EGCS may comprise an open loop scrubber, designed to operate by utilizing seawater and percolate the seawater one time through; a closed loop scrubber that makes use of water containing the chemicals for scrubbing and recirculation through the system: or a hybrid scrubber that is able to switch from an open to a closed mode.
A problem of the known EGCS is that the wash-water exiting the system may contain a significant amount of solids, such as soot, ash, exhaust gas particles and condensed oil residue, that are released into the seawater with the wash-water of the EGCS, which can be harmful to the environment.
It is an aim of the present invention therefore to provide a device and method for separating solids comprising soot, ash, exhaust gas particles and condensed oil residue from wash-water exiting an Exhaust Gas Cleaning System (EGCS), in particular provided on a vessel.
DISCLOSURE OF THE INVENTION These and other aims are provided by a device in accordance with claim 1. The invention provides a device for separating solids comprising soot, ash. exhaust gas particles and condensed oil residue from wash-water exiting an Exhaust Gas Cleaning System (EGCS), the device comprising: - a primary filter unit, comprising a primary filter inlet that connects through a first conduit with a wash-water outlet of the EGCS, a primary filter first outlet that exits filtered wash-water, and a primary filter second outlet that exits solids separated from the wash-water in the primary filter unit, as well as means for exiting the separated solids from the primary filter unit through said second outlet; - a secondary filter unit, comprising a secondary filter inlet that connects through a second conduit with the primary filter second outlet for the separated solids. a secondary filter first outlet that exits filtered wash-water through a third conduit, and a secondary filter second outlet that exits solids separated from the wash-water in the secondary filter unit, as well as means for exiting the separated solids from the secondary filter unit through said second outlet; and - a sludge storage container, comprising an inlet that connects with the secondary filter second outlet that exits the solids through a fourth conduit.
The invented device allows to significantly reduce the amount of solids released into the seawater with the wash water of an open loop EGCS, reducing possible adverse effects on the environment.
A further advantage of the invented device is that chemicals or sorbents are not required to capture the solids.
This reduces size, weight, equipment and operational costs.
Yet another advantage of the device is that a substantially reduced, and preferably very low, volume of sludge is produced compared to the amount of wash water that has been cleaned.
The volume of processed water divided by the volume of sludge produced by the secondary filter may be in the range of 100,000- 200,000 for instance.
The solids collected from the first and second filter unit form a sludge that is still pumpable.
An embodiment of the invention provides a device wherein the means for exiting the separated solids from the primary filter unit through said second outlet further comprise a compressed fluid tank and fluid compressor connected with the pumping unit and configured for generating a relatively large flow of backflush water for a relatively short time through the primary filter unit for cleaning the primary filter unit from the solids, and pumping the backflush water with the solids cleaned from the primary filter unit through the conduit to the secondary filter unit.
Alternatively, compressing means that are typically provided on a vessel could also be used to provide a relatively large flow of backflush water through the primary filter unit. However, the present embodiment provides a flexible unit for this purpose.
The outflow from the EGCS may be achieved by providing an open/close valve in the first conduit that leads to the primary filter unit. Opening the open/close valve may provide an outflow from the EGCS though the first conduit to the primary filter unit, conveniently under the action of gravity. The EGCS is then provided at a larger height than the primary filter unit. Alternatively, a pumping unit may be used for providing the outflow from the EGCS though the first conduit to the primary filter unit. Another embodiment relates to a device that further comprises a first valve provided in the first conduit for regulating the outflow of wash-water from the EGCS. The first valve may be operably manually, or may be part of a control circuit that regulates the outflow from the EGCS.
In practical embodiments, a device is provided, further comprising a second valve provided in the second conduit for regulating the outflow of solids from the primary filter unit to the secondary filter unit; and/or further comprising a third valve provided in the third conduit for regulating the outflow of wash-water from the secondary filter unit; and/or further comprising a fourth valve provided in the fourth conduit for regulating the outflow of solids from the secondary filter unit to the sludge storage container. In order to be able to adjust the outflow from the primary filter unit to the secondary filter unit and the filtering capacity of the secondary filter unit, a practical embodiment provides a device wherein the secondary filter unit is further provided with a buffer vessel for accommodating fluctuations in the stream of solids separated from the wash-water in the primary filter unit through the conduit to the secondary filter unit. It also may have advantages, for instance increasing efficiency or yield, to provide a device according to an embodiment wherein the third conduit for the wash-water originating from the secondary filter unit reconnects to the first conduit for the wash-water originating from the EGCS. This provides a recycling of wash-water exiting the secondary primary unit to the primary filter unit.
In order to be able to temporarily clean the secondary filter unit, a device according to an embodiment is characterized in that the means for exiting the separated solids from the secondary filter unit through said second outlet comprise a secondary filter additional inlet that connects through an additional conduit with a source of backflush water, wherein an additional valve is provided in the additional conduit for regulating the outflow of backflush water from the source to the secondary filter unit for cleaning the secondary filter unit from solids.
It may be advantageous to provide an embodiment of the device wherein the source of backflush water connects to the primary filter first outlet that exits the filtered wash-water originating from the primary filter unit.
To further increase yield, a device according to an embodiment comprises dewatering means provided between the secondary filter unit and the sludge storage container for further dewatering the solids exited from the secondary filter unit. A suitable embodiment provides the dewatering means in the fourth conduit, whereby the dewatering means preferably comprise a filter press. Such equipment is readily available.
In another embodiment, the dewatering means are provided in the sludge storage container itself. They preferably comprise a membrane filter provided in the sludge storage container. A suitable solution provides a so-called big bag that contains a permeable liner and that collects the sludge and filters out excess water that is collected in a receptacle into which the big bag is provided, for instance hung.
For safety reasons, another embodiment relates to a device wherein the EGCS comprises a secondary wash-water outlet that exits to the seawater in case of emergency.
The primary and secondary filter units may in principle be embodied in any form suitable for the purpose. Particularly suitable is an embodiment wherein the primary and/or secondary filter unit comprises a plurality of candle filters. Such filter units are relatively compact and configured to separate a relatively large amount of solids with a relatively low amount of wash-water.
The pumping unit may also be chosen among equipment suitable for the purpose. A particularly suitable pumping unit comprises a membrane pump.
Preferably, the secondary filter unit is designed to be smaller than the primary filter unit. This saves space on a deck of a vessel. In practical embodiments, the secondary filter unit 1s configured for processing a flow of water that is 100 times smaller than the water flow processable by the primary filter unit, more preferably 100 times smaller, even more preferably 500 times smaller, even more preferably 1000 times smaller, and most preferably 2000 times smaller.
With the invented device, solids comprising soot, ash, exhaust gas particles and condensed oil 5 residue may be separated from wash-water exiting an Exhaust Gas Cleaning System (EGCS), preferably on a vessel.
According to the invention, a method for separating solids comprising soot, ash, exhaust gas particles and condensed oil residue from wash-water exiting an Exhaust Gas Cleaning System (EGCS) comprises: - providing a device as claimed; - exiting wash-water from the EGCS and taking in the wash-water through the first conduit into the primary filter unit; - separating solids from the wash-water in the primary filter unit, discharging filtered wash- water through the primary filter first outlet; and exiting solids separated from the wash-water in the primary filter unit through the primary filter second outlet; - pumping the solids separated from the wash-water in the primary filter unit through the second conduit to the secondary filter unit; - taking in the separated solids through the second conduit into the secondary filter unit; - further separating solids from the wash-water in the secondary filter unit, discharging filtered wash-water via the secondary filter first outlet through the third conduit; and exiting solids separated from the wash-water in the secondary filter unit via the secondary filter second outlet; and - discharging the solids separated in the secondary filter unit to the sludge storage container through the fourth conduit.
A preferred embodiment provides a method wherein a relatively large flow of backflush water is generated for a relatively short time through the primary filter unit for cleaning the primary filter unit from the solids, and the backflush water is pumped with the solids cleaned from the primary filter unit through the conduit to the secondary filter unit.
In another embodiment, the outflow of wash-water from the EGCS is regulated by the first valve provided in the first conduit.
In yet another embodiment, the outflow of solids from the primary filter unit to the secondary filter unit is regulated by the second valve provided in the second conduit.
Yet another embodiment provides a method wherein the outflow of wash-water from the secondary filter unit is regulated by the third valve provided in the third conduit.
The outflow of solids from the secondary filter unit to the sludge storage container is regulated by the fourth valve provided in the fourth conduit, according to yet another embodiment of the method.
It may further be advantageous in a method according to another embodiment to accommodate fluctuations in the stream of solids separated from the wash-water in the primary filter unit through the conduit to the secondary filter unit by a buffer vessel of the secondary filter unit. Also, according to yet another embodiment, flow of backflush water is generated from the backflush water source to the secondary filter unit for cleaning the secondary filter unit from solids, and the backflush water with the solids cleaned from the secondary filter unit is provided through the fourth conduit to the sludge storage container under the influence of gravity. In another embodiment, the secondary filter unit may process a flow of water that is 100 times smaller than the water flow processed by the primary filter unit, more preferably 200 times smaller, even more preferably 500 times smaller, even more preferably 1000 times smaller, and most preferably 2000 times smaller. Dewatering means may be provided between the secondary filter unit and the sludge storage container for dewatering the solids exited from the secondary filter unit before storing said further dewatered sludge in the storage container. Dewatering may be carried out in a filter press, provided in the fourth conduit. In another embodiment, further dewatering of the solids exiting the secondary filter unit is achieved by storing the solids in a sludge storage container that comprises a membrane filter provided therein, for instance in the form of a big bag.
Itis explicitly mentioned that the embodiments disclosed in the present application may be combined in any possible combination of these embodiments, and that each separate embodiment may be the subject of a divisional application.
BRIEF DESCRIPTION OF THE FIGURE The above brief description, as well as other objects, features and advantages of the present invention will be more fully appreciated by reference to the following detailed description of a presently preferred, but nonetheless illustrative embodiment, when taken in conjunction with the accompanying drawing wherein: Fig. 1 is a schematic representation of a device according to an embodiment of the present Invention.
DETAILED DISCLOSURE OF THE INVENTION A scheme of the device and filtration system is shown in figure 1. Components of the device include a primary filter unit 2, a secondary filter unit 3 equipped with a buffer vessel 4, a membrane pump 5 connected to a compressed air tank 6 and air compressor 7. Flow control between the components (1-7) is achieved by valves A, B, C, D, and E. The intake to the primary filter unit 2 is wash water exiting from an EGCS 1. Solids separated by the primary and secondary filter units (2, 3) are drained to a sludge tank 8 which may be provided on deck of a vessel (not shown) or may be provided under deck. The device according to the embodiment shown discharges filtered wash water S2. In case of emergency, wash water can be discharged directly from the EGCS or scrubber S1. S3 represents backflush water used for cleaning the secondary filter 3. In an alternative embodiment, S3 may be taken from S2, using a small extra pump.
The device operates as follows. during normal operation valves A and C are open. Valves E and D are closed. Wash water from the EGCS 1 is processed by the primary filter 2. The primary filter unit 2 in the embodiment shown has multiple candle filters. The majority of the candles is filtering the wash water exiting from the EGCS 1, and the filtered water is discharged as stream S2. The driving force for wash water flow through the primary filter is gravity. Solids captured in 2 are removed by temporarily reversing the direction of water flow through one (or several) of the candle filters. Thereto, valve B is opened for a relatively short time. The membrane pump 5 starts working and discharges the so-called backflush water with solids from the primary filter to the buffer 4 and the secondary filter unit 3.
Configuring individual candle filters of the primary filter unit 2 for filtration or for backflush is integrated within the embodiment of the primary filter.
The change of flow configuration from filtration to backflush may be initiated by a timer, by a filter pressure drop sensor, or manually, or by other methods and means, if desired.
The duration of the backflush may be set by a timer, by the pump system, or manually, or by other methods and means, if desired.
Filtration and backflush of candle filters may occur in parallel.
The pump system comprises the membrane pump 5 and is driven by compressed air originating from tank 6. Air in the tank 6 may be pressurized by the compressor 7. The pump generates a large flow of backflush water for a short time using the compressed air stored in the tank 6. The compressor 7 has only a fraction of the capacity required for continuous operation of the pump, which is advantageous.
The pump 5 is started once valve B is opened.
Optionally, pump operation can be controlled by a valve in the air line from the tank 6 to the membrane pump 5. Pump operation may be synchronized with, and triggered by, lining up one or several candle filters of the primary filter unit 2 for backflush.
Backflush water with solids that originated from the primary filter unit 2 is transported by the membrane pump 3 to the secondary filter unit 3. The buffer vessel 4 accommodates the short, large and fluctuating discharge of the pump 5. The inventory of the buffer is gradually supplied to the secondary filter unit 3. Water, separated by the secondary filter unit 3 may be recycled to the primary filter unit 2 by gravity.
An option here is to discharge the water directly to the stream S2. The buffer vessel 4 may have an internal, pressurized air volume separated from the water and solids by a flexible membrane.
The air pressure may be controlled at a constant pressure, or the air pressure may be allowed to vary in dependence of the volume of water and solids.
Buffer vessel 4 and secondary filter unit 3 may be integrated in a single piece of equipment, if desired.
Solids are discharged from 3 by closing valves B and C, and opening valve D to the sludge tank 8. Solids removal and filter cleaning may be facilitated by supplying backflush water S3 by opening valve E.
Solids removal from the secondary filter unit 3 may be done automatically or manually.

Claims (27)

CONCLUSIES I. Inrichting voor het scheiden van vaste stoffen die roet, as, uitlaatgasdeeltjes en gecondenseerde olieresten omvatten uit waswater dat uit een Exhaust Gas Het reinigen van System (EGCS) komt, de inrichting omvattende: - een primaire filtereenheid, omvattende een primaire filterinlaat die via een eerste leiding is verbonden met een waswateruitlaat van de EGCS, een primaire filter eerste uitlaat die gefilterd waswater afvoert, en een primaire filter tweede uitlaat die in de primaire filtereenheid van het waswater afgescheiden vaste stoffen afvoert; - een secundaire filtereenheid, omvattende een secundaire filtermlaat die via een tweede leiding is verbonden met de primaire filter tweede uitlaat voor de afgescheiden vaste stoffen, cen secundaire filter eerste uitlaat die gefilterd waswater afvoert via een derde leiding, en een secundaire filter tweede uitlaat die in de secundaire filtereenheid van het waswater afgescheiden vaste stoffen afvoert, evenals middelen voor het afvoeren van de afgescheiden vaste stoffen van de secundaire filtereenheid via genoemde tweede uitlaat: - waarbij de middelen voor het afvoeren van de afgescheiden vaste stoffen van de primaire filtereenheid via genoemde tweede uitlaat een pompeenheid omvatten die in de tweede leiding tussen de primaire en secundaire filtereenheid is aangebracht, en die is ingericht voor het verpompen van de in de primaire filtereenheid van het waswater afgescheiden vaste stoffen via de tweede leiding naar de secundaire filtereenheid; en - een slib opslagcontainer, omvattende een inlaat die is verbonden met de secundaire filter tweede uitlaat die de vaste stoffen via een vierde leiding afvoert.CONCLUSIONS I. Apparatus for separating solids comprising soot, ash, exhaust gas particles and condensed oil residues from wash water coming from an Exhaust Gas Cleaning System (EGCS), the apparatus comprising: - a primary filter unit comprising a primary filter inlet which connected through a first conduit to a wash water outlet of the EGCS, a primary filter first outlet that discharges filtered wash water, and a primary filter second outlet that discharges solids separated from the wash water in the primary filter unit; - a secondary filter unit comprising a secondary filter outlet which is connected via a second conduit to the primary filter second outlet for the separated solids, a secondary filter first outlet which discharges filtered wash water via a third conduit, and a secondary filter second outlet which in the secondary filter unit discharges separated solids from the wash water, as well as means for discharging the separated solids from the secondary filter unit through said second outlet: the means for discharging the separated solids from the primary filter unit through said second outlet comprising a pump unit which is arranged in the second conduit between the primary and secondary filter unit and which is adapted to pump the solids separated in the primary filter unit from the washing water via the second conduit to the secondary filter unit; and - a sludge storage container comprising an inlet connected to the secondary filter second outlet which discharges the solids through a fourth conduit. 2. Inrichting volgens conclusie 1, waarin de afvoermiddelen voor de afgescheiden vaste stoffen vanaf de primaire filtereenheid via genoemde tweede uitlaat verder een onder druk staande vloeistoftank en vloeistofcompressor omvatten die met de pompeenheid is verbonden en is ingericht voor het opwekken van een relatief grote stroom backflushwater voor een relatief korte tijd door de primaire filtereenheid voor het reinigen van de primaire filtereenheid van de vaste stoffen, en het verpompen van het backflushwater met de gereinigde vaste stoffen vanaf de primaire filtereenheid via de leiding naar de secundaire filtereenheid.Apparatus according to claim 1, wherein the discharge means for the separated solids from the primary filter unit via said second outlet further comprises a pressurized liquid tank and liquid compressor connected to the pump unit and adapted to generate a relatively large flow of backflush water. for a relatively short time through the primary filter unit to clean the primary filter unit from the solids, and pump the backflush water with the cleaned solids from the primary filter unit through the conduit to the secondary filter unit. 3. Inrichting volgens één der voorgaande conclusies, verder omvattende een eerste klep die is aangebracht in de eerste leiding voor het reguleren van de uitstroom van waswater vanuit de EGCS.Apparatus according to any one of the preceding claims, further comprising a first valve disposed in the first conduit for regulating the outflow of wash water from the EGCS. 4. Inrichting volgens één der voorgaande conclusies, verder omvattende een tweede klep die is aangebracht in de tweede leiding voor het reguleren van de uitstroom van vaste stoffen vanuit de primaire filtereenheid naar de secundaire filtereenheid.An apparatus according to any preceding claim, further comprising a second valve disposed in the second conduit for regulating the outflow of solids from the primary filter unit to the secondary filter unit. 5. Inrichting volgens één der voorgaande conclusies, verder omvattende een derde klep die in de derde leiding is aangebracht voor het reguleren van de uitstroom van waswater vanuit de secundaire filtereenheid.Apparatus according to any one of the preceding claims, further comprising a third valve arranged in the third conduit for regulating the outflow of wash water from the secondary filter unit. 6. Inrichting volgens één der voorgaande conclusies, verder omvattende een vierde klep die inde vierde leiding is aangebracht voor het reguleren van de uitstroom van vaste stoffen vanuit de secundaire filtereenheid naar de slib opslagcontainer.An apparatus according to any one of the preceding claims, further comprising a fourth valve arranged in the fourth conduit for regulating the outflow of solids from the secondary filter unit to the sludge storage container. 7. Inrichting volgens één der voorgaande conclusies, waarin de secundaire filtereenheid verder is voorzien van een buffervat voor het opvangen van fluctuaties in de stroom van in de primaire filtereenheid van het waswater afgescheiden vaste stoffen via de leiding naar de secundaire filtereenheid.An apparatus according to any one of the preceding claims, wherein the secondary filter unit further comprises a buffer vessel for absorbing fluctuations in the flow of solids separated from the wash water in the primary filter unit via the conduit to the secondary filter unit. 8. Inrichting volgens één der voorgaande conclusies, waarin de derde leiding voor het uit de secundaire filtereenheid afkomstige waswater terugverbindt met de eerste leiding voor het van de EGCS afkomstige waswater.An apparatus according to any one of the preceding claims, wherein the third conduit for the washing water coming from the secondary filter unit connects back to the first conduit for the washing water coming from the EGCS. 9. Inrichting volgens één der voorgaande conclusies, waarin de afvoermiddelen voor de van de secundaire filtereenheid via genoemde tweede uitlaat afgescheiden vaste stoffen een secundaire filter additionele inlaat omvatten die via een additionele leiding is verbonden met een bron voor backflushwater, waarin een additionele klep is voorzien in de additionele leiding voor het reguleren van de uitstroom van backflushwater vanaf de bron naar de secundaire filtereenheid voor het reinigen van de secundaire filtereenheid van vaste stoffen.An apparatus according to any one of the preceding claims, wherein the discharge means for the solids separated from the secondary filter unit via said second outlet comprises a secondary filter additional inlet connected via an additional conduit to a source of backflush water, in which an additional valve is provided. in the additional conduit for regulating the outflow of backflush water from the source to the secondary filter unit for cleaning the secondary filter unit from solids. 10. Inrichting volgens conclusie 9, waarin de bron voor backflushwater is verbonden met de primaire filter eerste uitlaat die het gefilterde waswater dat afkomstig is van de primaire filtereenheid afvoert.The apparatus of claim 9, wherein the backflush water source is connected to the primary filter first outlet that discharges the filtered wash water from the primary filter unit. 11. Inrichting volgens één der voorgaande conclusies, waarin ontwatermiddelen zijn voorzien tussen de secundaire filtereenheid en de slib opslagcontainer voor het ontwateren van de vaste stoffen die uit de secundaire filtereenheid komen.Apparatus according to any one of the preceding claims, wherein dewatering means are provided between the secondary filter unit and the sludge storage container for dewatering the solids coming from the secondary filter unit. 12. Inrichting volgens conclusie 11, waarin de ontwatermiddelen zijn aangebracht in de vierde leiding en bij voorkeur een filterpers omvatten.12. Device as claimed in claim 11, wherein the dewatering means are arranged in the fourth conduit and preferably comprise a filter press. 13. Inrichting volgens conclusie 11 of 12, waarin de ontwatermiddelen zijn aangebracht in de slib opslagcontainer en bij voorkeur een membraanfilter omvatten die in de slib opslagcontainer is opgenomen.13. Device as claimed in claim 11 or 12, wherein the dewatering means are arranged in the sludge storage container and preferably comprise a membrane filter which is accommodated in the sludge storage container. 14. Inrichting volgens één der voorgaande conclusies, waarin de EGCS een secundaire waswateruitlaat omvat die afvoert naar het zeewater in geval van nood.Apparatus according to any one of the preceding claims, wherein the EGCS comprises a secondary wash water outlet which discharges to the seawater in an emergency. 15. Inrichting volgens één der voorgaande conclusies, waarin de primaire en/of secundaire filtereenheid een hoeveelheid kaarsfilters omvatten.15. Device as claimed in any of the foregoing claims, wherein the primary and/or secondary filter unit comprise a plurality of candle filters. 16. Inrichting volgens één der voorgaande conclusies, waarin de pompeenheid een {5 membraanpomp omvat.16. Device as claimed in any of the foregoing claims, wherein the pump unit comprises a diaphragm pump. 17. Inrichting volgens één der voorgaande conclusies, waarin de secundaire filtereenheid kleiner is dan de primaire filtereenheid.An apparatus according to any one of the preceding claims, wherein the secondary filter unit is smaller than the primary filter unit. 18. Inrichting volgens conclusie 17, waarin de secundaire filtereenheid is ingericht voor het verwerken van een waterstroom die 100 keer kleiner is dan de waterstroom die door de primaire filtereenheid kan worden verwerkt, met meer voorkeur 100 keer kleiner, met nog meer voorkeur 500 keer kleiner, met nog meer voorkeur 1000 keer kleiner, en met de meeste voorkeur 2000 keer kleiner.An apparatus according to claim 17, wherein the secondary filter unit is adapted to process a water flow that is 100 times smaller than the water flow that can be processed by the primary filter unit, more preferably 100 times smaller, even more preferably 500 times smaller , even more preferably 1000 times smaller, and most preferably 2000 times smaller. 19. Werkwijze voor het scheiden van vaste stoffen die roet, as, uitlaatgasdeeltjes en gecondenseerde olieresten omvatten uit waswater dat uit een Exhaust Gas System (EGCS) komt, de werkwijze omvattende: - het verschaffen van een inrichting volgens één der voorgaande conclusies; - het afvoeren van waswater uit de EGCS en het invoeren van het waswater door de eerste leiding in de primaire filtereenheid; - het in de primaire filtereenheid afscheiden van vaste stoffen uit het waswater, het afvoeren van gefilterd waswater door de primaire filter eerste uitlaat; en het afvoeren van in de primaire filtereenheid van het waswater afgescheiden vaste stoffen door de primaire filter tweede uitlaat;A method for separating solids comprising soot, ash, exhaust gas particles and condensed oil residues from wash water coming from an Exhaust Gas System (EGCS), the method comprising: - providing a device according to any one of the preceding claims; - discharging wash water from the EGCS and introducing the wash water through the first conduit into the primary filter unit; - separating solids from the washing water in the primary filter unit, discharging filtered washing water through the primary filter first outlet; and discharging solids separated in the primary filter unit from the wash water through the primary filter second outlet; - het verpompen van in de primaire filtereenheid van het waswater afgescheiden vaste stoffen door de tweede leiding naar de secundaire filtereenheid; - het invoeren van de afgescheiden vaste stoffen door de tweede leiding in de secundaire filtereenheid; - verder het scheiden van vaste stoffen van het waswater in de secundaire filtereenheid, het afvoeren van gefilterd waswater via de secundaire filter eerste uitlaat door de derde leiding ; en het afvoeren van in de secundaire filtereenheid van het waswater afgescheiden vaste stoffen via de secundaire filter tweede uitlaat; en - het afvoeren van de in de secundaire filtereenheid afgescheiden vaste stoffen naar de slib opslagcontainer door de vierde leiding.- pumping solids separated from the washing water in the primary filter unit through the second line to the secondary filter unit; - introducing the separated solids through the second conduit into the secondary filter unit; - further separating solids from the washing water in the secondary filter unit, discharging filtered washing water through the secondary filter first outlet through the third conduit; and discharging solids separated in the secondary filter unit from the wash water through the secondary filter second outlet; and - discharging the solids separated in the secondary filter unit to the sludge storage container through the fourth conduit. 20. Werkwijze volgens conclusie 19, waarin een relatief grote stroom backflushwater voor een relatief korte tijd door de primaire filtereenheid wordt geleid voor het reinigen van de primaire filtereenheid van de vaste stoffen, en het backflushwater met de gereinigde vaste stoffen vanaf de primaire filtereenheid via de leiding naar de secundaire filtereenheid wordt gepompt.The method of claim 19, wherein a relatively large stream of backflush water is passed through the primary filter unit for a relatively short time to clean the primary filter unit of the solids, and the backflush water with the cleaned solids is passed from the primary filter unit through the said primary filter unit. line is pumped to the secondary filter unit. 21. Werkwijze volgens één der conclusies 19-20, waarin de uitstroom van waswater van de EGCS wordt gereguleerd door de in de eerste leiding aangebrachte eerste klep.A method according to any one of claims 19-20, wherein the outflow of washing water from the EGCS is regulated by the first valve arranged in the first conduit. 22. Werkwijze volgens één der conclusies 19-21, waarin de uitstroom van vaste stoffen vanuit de primaire filtereenheid naar de secundaire filtereenheid wordt geregeld door de in de tweede leiding aangebrachte tweede klep.A method according to any one of claims 19-21, wherein the outflow of solids from the primary filter unit to the secondary filter unit is controlled by the second valve arranged in the second conduit. 23. Werkwijze volgens één der conclusies 19-22, waarin de uitstroom van waswater vanuit de secundaire filtereenheid wordt geregeld door de in de derde leiding aangebrachte derde klep.A method according to any one of claims 19-22, wherein the outflow of washing water from the secondary filter unit is controlled by the third valve arranged in the third conduit. 24. Werkwijze volgens één der conclusies 19-23, waarin de uitstroom van vaste stoffen vanuit de secundaire filtereenheid naar de slib opslagcontainer wordt geregeld door de in de vierde leiding aangebrachte vierde klep .A method according to any one of claims 19-23, wherein the outflow of solids from the secondary filter unit to the sludge storage container is controlled by the fourth valve arranged in the fourth conduit. 25. Werkwijze volgens één der conclusies 19-24, waarin fluctuaties in de stroom door de leiding naar de secundaire filtereenheid van in de primaire filtereenheid van het waswater afgescheiden vaste stoffen worden opgevangen door het buffervat van de secundaire filtereenheid.A method according to any one of claims 19-24, wherein fluctuations in the flow through the conduit to the secondary filter unit of solids separated from the wash water in the primary filter unit are collected by the buffer vessel of the secondary filter unit. 26. Werkwijze volgens één der conclusies 19-25, waarin een stroom backflushwater van de backflush waterbron naar de secundaire filtereenheid wordt opgewekt voor het reinigen van de secundaire filtereenheid van vaste stoffen, en het backflushwater met de gereinigde vaste stoffen vanaf de secundaire filtereenheid wordt verschaft door de vierde leiding naar de slib opslagcontainer onder de invloed van zwaartekracht.A method according to any one of claims 19 to 25, wherein a flow of backflush water is generated from the backflush water source to the secondary filter unit for cleaning the secondary filter unit from solids, and the backflush water is provided with the cleaned solids from the secondary filter unit. through the fourth pipe to the sludge storage container under the influence of gravity. 27. Werkwijze volgens één der conclusies 19-26, waarin de secundaire filtereenheid een stroom water verwerkt die 100 keer kleiner is de waterstroom die door de primaire filtereenheid wordt verwerkt, met meer voorkeur 100 keer kleiner, met nog meer voorkeur 500 keer kleiner, met nog meer voorkeur 1000 keer kleiner, en met de meeste voorkeur 2000 keer kleiner.A method according to any one of claims 19-26, wherein the secondary filter unit processes a flow of water that is 100 times smaller than the water flow processed by the primary filter unit, more preferably 100 times smaller, even more preferably 500 times smaller, with even more preferably 1000 times smaller, and most preferably 2000 times smaller.
NL2027592A 2021-02-18 2021-02-18 Device and method for separating solids from wash-water exiting an exhaust gas cleaning system (egcs) NL2027592B1 (en)

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