• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Semi-closed water circuit system for suction dredges, comprising at least: a suction pipe (2) with a suction head (1) and a suction pump; a pitcher (4) where dredged sediments and water accumulate; a series of antirrebose side plates (4a) located on the edge of the wall of the pitcher (4); a compartment of excess water (7) for the accumulation of overflowed water; and a recirculation system (8), which carries the turbid water overflowed from the ship to the seabed, to an area close to the suction head (1). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2574495A2
    申请号:ES201431877
    申请日:2014-12-18
    公开日:2016-06-20
    发明作者:Carlos DURÁN NEIRA；Xulio FERNÁNDEZ HERMIDA；Pablo IZQUIERDO BELMONTE；Pablo YÁÑEZ ALFONSO；José Antonio VILÁN VILÁN
    申请人:Canlemar SL；Nodosa SL；Canlemar S L；Centro De Investig Submarinas S L；Nodosa S L；Centro de Investigaciones Submarinas SL；
    IPC主号:
    专利说明:

    Semi-closed water circuit system for suction dredgers Field of application of the invention:
    The system included in the present invention has application within the naval sector, taking into account environmental aspects, in order to guarantee the conservation of the seabed during a suction dredging process. Specifically, this invention refers to an improved semi-closed water circuit system for suction dredgers, which presents improvements in the management of sucked materials and their deposition on the seabed, reducing the environmental impact of the area where develops such dredging activity.
    More specifically, the system of the invention is of the type comprising: a suction circuit, consisting of a suction pipe, a suction head and a suction pump; and at least one pitcher in which the suction circuit is poured through a discharge pipe. The present invention aims to improve technical aspects of the described system to further minimize the environmental impact of the process, and to improve and reduce the necessary operating times during the dredging operation. Background of the invention
    Currently in the naval industry there are a wide variety of systems that increase efficiency during dredging operations, consisting essentially of the introduction of various devices in the suction mouth, to improve the dredging capacity of the system, such as: hydraulic systems, water jets under pressure, etc. Current dredgers base their operating principle on a suction head attached to a tube through which, thanks to a pumping system, the material is brought up from the seabed, along with a large amount of water, to a container container, called Cantabrian, located on the ship or on the surface. In said pitcher, the densest sediments are deposited in its bottom while, as the pitcher is filled with water with sediments in


    Flotation (or cloudy water) overflows or overflows at its top, falling directly into the sea. The process of dredging and overflowing of turbid water to the sea is prolonged throughout the dredging process, until the pitcher is as full as possible of dense sediments deposited. However, during the whole process large quantities of cloudy water have been spilled into the sea, contaminated with the finest and least dense sediments, which return to the sea, from the surface of the same, and causing a great pollution since, being Not very dense materials, they disperse through water due to sea currents. On average, in today's conventional dredging systems, 30% of the sediments of the dredged material return to the sea due to overflowing the turbid water from the pitcher to the sea surface.
    ES-2-345-869-B1 is known as a system that increases dredging efficiency through the use of surplus water from the pitcher, thereby minimizing the environmental impact derived from the process.
    The aforementioned problem of current conventional dredging systems is joined by the fact that, in recent years, environmental regulations in Spain, since our incorporation into the European Union with the signing of various environmental preservation agreements, is each Stronger time. Currently there are specific rules that directly affect dredging activities and that have increased the environmental requirements that must be met during them. The current regulatory framework for compliance is the “guidelines for the characterization of dredged material and its relocation in waters of the maritime-terrestrial public domain” published by the Ministry of Agriculture, Food and Environment in 2014, which requires, for the realization of most dredging operations, a declaration and study of the environmental impact of the process. In addition, given the imminent change in the sector, marked by the existence of a stricter regulatory framework and a greater environmental protection obligation, only dredging processes


    eco-sustainable will be competitive, leaving out current conventional systems. Description of the invention
    The present invention aims at a semi-closed water system for suction dredgers with which it is possible to reduce the environmental impact of the dredging operation and improve the dredging efficiency of finer materials. Another object of the invention is to achieve an efficient and ecological application of the dredging process under existing environmental regulations and recommendations. The semi-closed water circuit system of the present invention improves the previously known systems and significantly reduces the pollution produced in the dredging zone during the process. This system implements the recirculation of the cloudy water that overflows from the pitcher, and that in normal conditions, falls back to the sea, on the surface, causing a dispersion of the pollutants they contain, which would be distributed over a wide area of the environment, with the consequent environmental impact produced. With this invention, the overflowed turbid water from the pitcher is contained in an additional compartment, called a surplus water compartment (cloudy water, with light sediments), and is recirculated towards the seabed. Said recirculation can be with forced impulsion, by means of an additional pumping system, different from the one of suction, or without forced impulse, since the water would circulate towards the seabed from the compartment thanks to the own weight of the water column. The sediments contained in the turbid water that is recirculated are, therefore, directed again towards the suction zone, so that a large part of them are sucked again during the process. Recirculating cloudy water in the background


    marine already supposes an enormous ecological benefit because the dispersion of this cloudy water will now be much smaller and concentrated since it is very close to the seabed where it was located, and in addition, part of it is again dredged. The semi-closed water circuit system described in this invention, together with a complementary system for improving the sediment discharge process by geotextile, significantly reduces the environmental impact of the dredging process, thus allowing dredging vessels to use This technology adapts to the most demanding environmental regulations. The system of the invention is formed by the following elements: - Suction head, through which the sediments mixed with abundant water enter a pipe or suction arm, thanks to the impulse of a suction pump, and reach the pit where both water and sediments are deposited together, through a discharge pipe. -Cántara: compartment in whose bottom the densest sediments accumulate by decantation, and in whose upper part, the water is disposed, with the less dense materials extracted during the dredging process, forming a cloudy water. The pitcher also has a series of vertical plates and deflector obstacles inside, whose functionality is detailed below. -Left of surplus water: located in the vicinity of the pitcher (or pitchers), that is, either along all or part of its periphery of being a vessel with a single pitcher; in the middle of the two independent pitcher zones located on split-vessel vessels (or two cantaras), or in suitable areas around one or more of them in the case of vessels with multiple pitchers. In all cases, the purpose is to accumulate water from the overflow of the pitcher (or pitchers) through overflows. - System of recirculation of cloudy water formed by a set of pipes, in general, parallel to the pipe itself or suction arm, where said water is directed back to the seabed, in general, to the environment of the suction head. The movement of cloudy water is achieved or without drive


    forced, by the weight of the water column itself, and without energy consumption, or with forced impulsion, by means of a second pumping system different from that of suction. The principle of operation of this dredging system is based on the following operations. First, the dredge sucks the sedimentary material from the seabed through the dredging head and its pipe
    or suction arm, thanks to the performance of a suction pump. These sediments, mixed with water from the seabed, are deposited and accumulated in the pitcher, in which the heaviest materials decant at their bottom. The pitcher is therefore filled with a mixture of sedimentary material and water. As the pitcher is filled, the excess water overflows, dragging with it lighter sedimentary materials, a mixture of water and less dense sediments (cloudy water). In conventional dredging systems, when overflowing the water from the pitcher it is poured directly to the surface of the sea, producing a contamination of the area with light sedimentary materials. However, with the present invention, the surplus turbid water is collected in a surplus water compartment and recirculated to the seabed through the recirculation system. In addition, the pitcher presents a series of baffle obstacles, for example of the type of baffle plates, which constitute the so-called system of appeasement of water in the pitcher, whose function is to favor the decantation of sediments carried by water. This appeasement system ensures that the circulation of fluid in the pitcher and between the pitcher and the excess water compartment is slow. The appeasement system is completed with a series of plates, chains and guiding elements for the water located between the discharge pipe and the pitcher, so that the water sucked and poured into the pitcher is circulated in a guided way and with a less beating, favoring the decantation and avoiding the drag of the sediments already deposited in the pitcher. Likewise, the discharge mouths of the discharge pipe are oriented to achieve this slow circulation and laminar regime of the sucked water. Finally, also with the objective of favoring the sedimentation of sediments, they are poured into the pitcher


    Non-polluting chemicals, such as anionic flocculants, that favor flocculation or agglutination of colloidal substances present in cloudy water, thus facilitating their decantation. In this way, a series of physicochemical systems and techniques are defined to favor the decantation of
    5 sediments. By means of the system described in the present invention, part of the dredged material contained in the cloudy water is recirculated back to the seabed, through the recirculation system. This prevents excess water from directly overflowing into the sea, as it is recirculated back to the
    10 background. This decreases the dispersion of sedimentary material contained in cloudy water, unlike if it was poured directly to the sea surface from the pitcher. However, the present invention improves the dredging system and allows vessels that implement this semi-closed circuit system to
    15 dredged, they can perform these operations in accordance with the regulatory framework that will meet greater requirements for environmental protection, since this system significantly improves the environmental impact of this process. The system of the invention can be complemented with other known means,
    20 such as the use of a bag of geotextile material that wraps around all the sediment deposited in the pitcher and that, during the process of dumping into the sea, prevents disintegration, dispersion and separation of the same, reducing pollution of the area where said deposition

    Brief description of the drawings
    Next, in order to facilitate the understanding of this invention, the drawings present therein are briefly described, to aid in the better compression of the dredged water closed circuit system, and of the
    5 dredging process described herein: Figure 1 shows a diagram, in isometric view, of a vessel implementing the semi-closed dredging circuit system. Figure 2 shows a side view of said system. Figure 3 shows an isometric detail of the head.
    10 Figure 4 a side visa of said head. Figure 5 shows a front view of the pitcher with a detail of the edge of it.
    These figures represent the functional elements of the system of
    15 dredged, identified according to the following numbering: 1-Suction head 1a-Side plate of the suction head 2-Pipe or suction arm 3-Discharge pipe to pitcher
    20 3 ´-Discharge mouths 4-Cantabria 4a-Perimeter edge of the pit 5-Overflows 6-Water appeasement system
    25 7-Leftover water compartment 8-Recirculation system 8a-Recirculation system nozzle 8b-First rigid section of the recirculation system tube 8c-Third flexible section of the recirculation system tube
    30 8d-Second inner section of the recirculation system tube

    Detailed description of an embodiment.
    As shown in Figure 1, the dredged material (sediments) is dragged, along with the seabed water, from the head (1) through the pipe or suction arm (2) to the discharge pipe ( 3) to the pitcher or pitchers (4) of the dredge. Water with sediments is suctioned through a pumping system. In the pitcher, the use of side plates (4th) on its perimeter edge, figures 2 and 5, allows to avoid lateral overflows of the contents of the pitcher produced by the movements of the ship. The discharge pipe (3) pours through a series of discharge mouths (3 ') that are oriented inwards, opposite to each side of the pitcher, to propitiate a slow circular flow and increase the settling time of the sediments. Likewise, in the pitcher it is possible to favor, by means of different known physical-chemical systems, the decantation of the sedimentary particles contained in the water, thanks to a system of appeasement of water (6) composed for example based on a plurality of obstacles baffles that reduce the speed of the circulating fluid through the pitcher. When the pitcher is filled, the surplus turbid water (water plus less dense sediments) overflows through overflows (5) from the pitcher to a compartment of excess water (7). The system is valid both for dredgers with a single central tank and for ships of several independent tanks. The location of the surplus water compartment (7) will depend on the morphology of the ship and can be located in the central area, between the pitchers, at any interior point or along the perimeter thereof. The cloudy water contained in the surplus water compartment (7) is conducted to a recirculation system (8). Said system allows the excess water to be redirected back to the seabed, completing the semi-closed circuit, through different sections that are part of the recirculation system, generally parallel to the pipe or suction arm (2), figure 2, : A first section (8b) of rigid tube, generally parallel and close to the pipe or suction arm (2), a second section (8d) of tube, which runs through the inside of the


    vessel and a third section (8c) of flexible tube that connects the first and second section mentioned and allows to adapt to the degrees of freedom of the suction pipe (2), ending in a nozzle (8a) of the recirculation system. Recirculation is achieved either by a forced drive system
    5 (drive pump) or without said forced drive system, by the weight of the water column itself and the difference in elevation between the excess water compartment and the seabed.
    The nozzle of the recirculation system (8a) returns the turbid water left over with light sediments to an area close to the suction head itself (1).
    10 which allows a large part of said fluid (cloudy water with sediments) to be sucked again (completing the semi-closed circuit of the dredging process). The use of side plates (1a), figure 3, in the suction head allows to increase its stability by increasing the support surface of the head, as well as increasing the pressure exerted by the head on the bed
    15 marine, contributing to avoid vertical movements of the head, and also, eliminating the grooves that occur during dredging due to successive passes of the head on the seabed.

    权利要求:
    Claims (5)
    [1]
    one. Semi-closed water circuit system for suction dredgers, comprising at least one suction circuit consisting of a suction pipe (2), a suction head (1) and a suction pump; at least one pitcher (4) that accumulates dredged sediments and water; and a discharge pipe (3) of the water sucked into the pitchers (4) ,, characterized in that it also includes: - Overflows (5) that channel the remaining water from the pitcher (4) to at least one remaining water compartment ( 7), for the accumulation of overflowed water from the pitcher (4); and -a recirculation system (8) that conducts the accumulated water in the surplus water compartment (7) to a recirculation nozzle (8a) located on the seabed, close to the suction head (1).
    [2]
    2. System according to claim one, characterized in that the recirculation system comprises a first section (8b) of rigid tube that reaches the nozzle (8 a) parallel and close to the suction pipe (2); a second section (8d) of pipe that starts at the bottom of the excess water compartment (7) and runs through the interior of the vessel; and a third section (8c) of flexible pipe, which connects the first and second sections of pipe.
    [3]
    3. System according to claim 1, characterized in that the suction head (1) has external stabilizing side plates (1a).
    [4]
    Four. System according to claim 1, characterized in that the pitcher (4) has on the edge of its wall side plates (4a), which act against the overflow of said pitchers.
    [5]
    5. System according to claim 1 characterized in that it comprises a water appeasement system (6) composed of a plurality of deflector obstacles arranged between the water discharge pipe (3) and the

    pitcher or pitchers (4) and intended to favor the decantation of sediments, in the pitcher or pitchers (4).

    6 3´
    4 3
    5
    2
    8
    one
    Fig. 1
    3 744th3
    8d
    8c
    8b
     Fig. 2
    8a

    Fig. 5
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3999566A|1975-08-21|1976-12-28|Ishikawajima-Harima Jukogyo Kabushiki Kaisha|Method and apparatus for discharging overboard excess water from hopper of hopper suction dredger or barge or scow|
    JPS62164922A|1986-01-13|1987-07-21|Mitsubishi Heavy Ind Ltd|Drag-suction dredger|
    GB2235482B|1989-08-29|1993-11-03|Kaisya Ikikaihatu Yugen|Method of and apparatus for preventing diffusion of muddy water in sand/gravel gathering equipment|
    BE1005478A3|1991-10-30|1993-08-03|Dredging Int|Procedure and equipment for selective removal of contaminated anduncontaminated dredged material|
    ES2345869B1|2009-04-03|2011-06-20|Centro De Investigaciones Submarinas, S.L.|CLOSED WATER CIRCUIT SYSTEM FOR SUCTION DRAGES.|
    CN102249515A|2011-07-14|2011-11-23|中交天津港航勘察设计研究院有限公司|Dredged mud dewatering method for small suction cutter dredger|CN106013307B|2016-07-11|2018-03-06|浙江国际海运职业技术学院|A kind of structure improved dredger|
    CN106013294B|2016-07-11|2018-03-06|浙江海洋大学|A kind of spoil disposal tubular construction of dredger|
    CN106193163A|2016-08-30|2016-12-07|张大伟|A kind of efficiently cutter suction dredger|
    CN106759600A|2016-12-02|2017-05-31|中交天津航道局有限公司|A kind of rake inhales the method that ship excavates sulfide hydrogen toxic gas soil property|
    NL2019109B1|2017-06-22|2019-01-07|Boskalis Bv Baggermaatschappij|Trailing suction hopper dredger having a recycle system for effluent and method for suction dredging|
    CN108086385A|2017-12-22|2018-05-29|合肥市脍炙人家家居用品有限责任公司|A kind of new mud walking ship|
    US10167609B1|2018-01-12|2019-01-01|Cashman Dredging & Marine Contracting Co., LLC|Carouseling articulated dredge and barge|
    GB201814059D0|2018-08-29|2018-10-10|Rotech Group Ltd|Improved underwater device|
    CN111021447A|2019-12-27|2020-04-17|山东良耘生态科技有限公司|Sludge cleaning ship suitable for Bohai Bay navigation channel|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201431877A|ES2574495B1|2014-12-18|2014-12-18|SEMI-CLOSED WATER CIRCUIT SYSTEM FOR SUCTION DRAGES|ES201431877A| ES2574495B1|2014-12-18|2014-12-18|SEMI-CLOSED WATER CIRCUIT SYSTEM FOR SUCTION DRAGES|
    PCT/ES2015/070931| WO2016097455A1|2014-12-18|2015-12-18|Semi-closed water circuit system for suction dredger|
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