• 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:
    [Problem] To provide a more compact cleaning apparatus for a sand filtration layer, and reduce the scale of operations and the running costs. [Solution] The cleaning system (1) is designed for use in a seawater permeation intake apparatus (5) for intake of seawater having permeated through a sand filtration layer (2) and a supporting gravel layer (3) on the seabed through intake pipes (4) buried in the supporting gravel layer (3), in order to remove from the sand filtration layer (2) suspended matter that could cause clogging. The system is provided with: diffuser tubes (7) buried in the sand filtration layer (2) and having air holes (6); and a compressed air delivery means (8) for feeding air into the diffuser tubes (7). The filtration sand of the sand filtration layer (2) is agitated by jetting air from the air holes (6), removing suspended matter that has become admixed or deposited in the sand filtration layer (2). [Effect] As compared with conventional systems that inject water or seawater into a sand filtration layer, the cleaning equipment can be more compact, and the scale of operations and running costs can be reduced.
    公开号:ES2554297A2
    申请号:ES201590053
    申请日:2013-10-25
    公开日:2015-12-17
    发明作者:Masaki Inui；Hideyuki Niizato；Takayuki Inoue；Youichi YANAGIMOTO；Tadao Oiwa；Hitoshi Mimura
    申请人:Nagaoka International Corp；Hitachi Zosen Corp；Nagaoka KK；
    IPC主号:
    专利说明:

    5
    10
    fifteen
    twenty
    25
    30
    However, in cases where an apparatus for the admission of seawater infiltration is to cover a large area for the admission of water, the volume of fresh water or seawater required for cleaning increases accordingly with the surface area for the admission of water. In this way, the size of the cleaning apparatus increases, the construction scale increases and the operating cost also increases.
    Patent Reference
    Patent Reference 1: Publication No. 2004-33993 of Japanese Kokai Patent Application.
    Compendium of the Invention Problems to be solved by the invention
    The problem that is proposed to solve the invention is that the conventional cleaning system for a sand filtration layer was of a type in which fresh water or sea water was injected into the sand filtration layer, and therefore a cleaning device of a larger size, of a larger construction scale, as well as a higher operating cost was required.
    Means to solve these problems
    The object of the present invention is to provide a cleaning system for a sand filtration layer, which uses a smaller apparatus, which has a lower cost, and which has a better cleaning capacity than the conventional system that injects fresh water. or seawater in a sand filtration layer.
    In order to achieve this object, the present invention provides a cleaning system configured to remove sediment from clogging of a sand filtration layer. This system is used with an apparatus for an admission of seawater infiltration that makes an admission of seawater, by means of a water intake pipe buried in the gravel support layer, after water has been infiltrated of sea through the filtration layer and the support gravel layer on an ocean floor. This cleaning system is provided with a diffuser pipe buried in the support gravel layer, the diffuser pipe having blow holes, and a compressed air supply device configured to supply air to the diffuser pipe. The air is blown through the blow holes to agitate the filtration sand of the sand filtration layer, to remove sediments that have been trapped within the sand filtration layer or accumulated on it.
    5
    10
    fifteen
    twenty
    25
    30
    In accordance with the present invention, high pressure air is blown from the blow holes made in the diffuser pipe, feeding the air from the compressed air supply device into the diffusion pipe buried in the sand filtration layer. High pressure air bubbles blown from the blow holes make the filtration sand agitated, making it possible to remove sediments that are trapped inside the sand filtration layer or accumulated on it.
    Advantageous effects of the invention
    The present invention uses compressed air as a fluid that acts on the filtration sand, thus making it possible to reduce the size of the apparatus compared to conventional systems that inject fresh water or seawater into the sand filtration layer, reducing with it the scale of construction, as well as the cost of operation. The present invention is also able to reliably prevent the clogging of the sand filtration layer by regularly supplying air from the compressed air supply device to the diffuser pipe.
    Brief description of the drawings
    Figure 1 is a drawing illustrating the structure of the cleaning system according to the present invention.
    Figure 2 shows cross-sectional views of the diffuser pipe, in which Figure 2 (a) is a drawing illustrating the range of positions of blow holes for which the filtration sand does not flow easily inward, and the Figure 2 (b) is a drawing showing the position of the blow holes in the example of Figure 1.
    Figure 3 shows examples that prevent the interference of the blow holes, in which Figure 3 (a) is a drawing showing a structure in which the blow holes are arranged in a staggered or three-way configuration alternating between right and left, and Figures 3 (b) is a drawing showing a structure in which the blow holes are arranged in the same positions on the right and left, and arranged so that the blow holes of a pipe diffuser are in a three-way position in front of the blow holes of a nearby diffuser pipe.
    Figure 4 shows an example in which the blow holes are configured to form a nozzle, in which Figure 4 (a) is a drawing of a case in which the orifice of
    5
    10
    fifteen
    twenty
    25
    30
    blowing has a configuration in which the peripheral area is highlighted out; Figure 4 (b) is a drawing of a case in which a nozzle is attached to a separate member; and Figure 4 (c) is a drawing illustrating the configuration of the nozzle shown in Figure 4 (b).
    Figure 5 shows an example in which the diffuser pipe is bent in a wave form, in which Figure 5 (a) is a plan view, Figure 5 (b) is a front view and Figure 5 ( c) is a side view.
    Figure 6 shows an example in which the diffuser pipe is bent into a waveform with joints or joints, in which Figure 6 (a) is a front view showing a unit; Figure 6 (b) is a front view showing a state in which multiple units are linked together; and Figure 6 (c) is a side view.
    Figure 7 is an image illustrating the results of tests showing the relationship between the depth of the diffuser pipe [in which in Figure 7 (a) it is 100 mm; in figure 7 (b) it is 300 mm; in figure 7 (c) it is 500 mm; and in Figure 7 (d) it is 1000 mm] and the area in which air bubbles are blown.
    Figure 8 is an image illustrating the test results showing the relationship between the depth of the diffuser pipe [in which in Figure 8 (a) is 300 mm and in Figure 8 (b) it is 500 mm ] and the area in which air bubbles are blown.
    Figure 9 is an image illustrating the results of tests showing the relationship between the volumetric flow rate of air fed to the diffuser pipe [which in Figure 9 (a) is 80 L / min; in figure 9 (b) it is 150 L / min; and in Figure 9 (c) it is 300 L / min] and the area in which air bubbles are blown.
    Figure 10 is a drawing illustrating an example in which the area surrounding the blow holes is covered with a net having holes with a diameter smaller than the diameter of the filtration sand.
    Figure 11 is a drawing illustrating an example in which the area surrounding the blow holes is covered with a porous member having holes with a diameter smaller than the diameter of the filtration sand, in which Figure 11 ( a) shows a state prior to the union of the porous member, and Figure 11 (b) shows a state in which a porous member is joined in a position of a blow hole.
    5
    10
    fifteen
    twenty
    25
    30
    Preferred Embodiment of the Invention
    In the following an example of a preferred embodiment of the present invention is described in detail, using Figures 1-11.
    Example
    In Figure 1, Reference Number 1 indicates an apparatus for an admission of seawater infiltration for the introduction of a seawater that has been infiltrated through a layer of filtration sand 2 and a layer of gravel 3 of support which are arranged on an ocean floor, by means of a water inlet pipe 4 buried in the support gravel layer 3. The water inlet pipe 4 is a pipe that has a water inlet port, and a water collection pump is connected to the water inlet pipe 4 to introduce seawater that has been infiltrated through the layer 2 sand filtration and gravel layer 3 support.
    Reference Number 5 indicates a cleaning system of the present invention that performs cleaning by eliminating sediments that cause clogging of the filtration sand layer 2, and which has a diffuser pipe 7 that has a blow hole 6 and is buried in the filtration sand layer 2, and having a diffuser pipe 7 provided with a blow hole 6 and is buried in the filtration sand layer 2, and a compressed air supply device 8 that feeds air into the pipe diffuser 7.
    In the present example, a plurality of diffuser pipes 7 are buried and aligned next to each other horizontally. The diffuser pipes 7 are connected to a collecting pipe 9 which is connected to a compressed air supply device 8 that includes a compressor and an air tank. In the present invention, diffuser pipes 7 are straight pipes having blow holes 6 arranged at fixed intervals. Reference Number 10 represents the air bubbles that are blown from the blow holes 6.
    Because the diffuser pipes 7 are buried in the filtration sand layer 2, the present invention is capable of cleaning by periodically feeding air to the diffuser pipes 7 from the compressed air supply device 8, so that it is agitated the filtration sand of the filtration sand layer 2 by blowing the air from the blow holes 6, thereby driving upwards by blowing, in a seawater
    5
    10
    fifteen
    twenty
    25
    30
    11, the sediments trapped in the filtration sand layer 2 or accumulated on the surface thereof. Sediments that are driven upward by blow in seawater 11 are discharged outside the system into the intake zone and water by means of a wave or a current, for example.
    Figure 2 shows cross-sectional views of the diffuser pipe 7. It is desirable to arrange the blow holes 6 in a range of positions such that the blow holes 6 are oriented downward from their horizontal position when installed on the ocean floor, as shown by the arrows in figure 2 (a). This is because if the blow holes 6 are arranged in an upwardly oriented position, the filtration sand flows easily to the diffuser pipes 7 when they are in a standby mode in which cleaning is not being performed. If the blow holes 6 are arranged in a downward position from their horizontal position, the filtration sand can be prevented from flowing inward as long as the pressure inside the diffuser pipes 7 is higher than the outside.
    In order to hinder an inverse flow of filtration sand into the diffuser pipes 7, it is desirable that the diameter of the blow holes 6 be 5 times smaller than the average size of the filtration sand particles.
    In the example shown in Figure 1, two blow holes 6 are arranged in a rotated position + 30 ° to the right or to the left, using as a model (0 °) the lower end of the vertical direction in cross section of the diffuser pipe 7. The blow holes 6 are oriented radially from the center of the diffuser pipe 7. This configuration makes it possible to prevent the flow of sand towards the diffuser pipe 7, and also to blow air at high pressure to a wide area even if there is a diffuser pipe 7.
    The present invention may use a perforated diffuser pipe that releases air bubbles from the entire length of the pipe body, but the type of pipe shown in Figure 2 (b) is capable of expelling the air at a higher pressure, provided that there is no change in the amount of air that is supplied, thereby improving the cleaning effect on the filter sand in the area surrounding the blow holes 6.
    As shown in a plan view of the diffuser pipes of Figure 3, the blow holes 6 are arranged in positions that do not interfere with the blow holes 6 of
    5
    10
    fifteen
    twenty
    25
    30
    another diffuser pipe 7 next. This improves the overall cleaning effect, because there is no reduction in the pressure at which the air is expelled. Specifically, a configuration is used in which the blow holes 6 of a diffuser pipe 7 are arranged in a triplet configuration alternating between right and left, and the blow holes 6 are arranged in a triplet configuration so that the blow holes 6 are arranged in positions between the blow holes 6 facing the other diffuser pipe 7, as shown in Figure 3 (a).
    In another example, the blow holes 6 may be arranged in the same positions on the right and left, and arranged so that the blow holes 6 of a diffuser pipe are in a three-way position in front of the blow holes of a proximal diffuser pipe 7, as shown in Figure 3 (b).
    In the configuration of the diffuser pipe 7 shown in Figure 2, if the internal pressure of the diffuser pipe 7 is less than the external pressure when the cleaning of the filtration sand layer 2 is completed, there is the possibility of an inverse flow of sand along with seawater to the diffuser pipe 7. In a worst case scenario, if this inverse flow of filtration sand continues to accumulate within the diffuser pipe 7, there is a risk that the diffuser pipe 7 becomes clogged.
    Therefore, it is advantageous in the present invention that the blow holes 6 are configured in the form of a nozzle protruding outwardly from the diffuser pipe 7, because even if there is a reverse flow of Filtration sand towards the diffuser pipe 7, it is easier to discharge it outside, during the next cleaning.
    Specifically as shown in Figure 4 (a), the blow holes 6 are configured in the form of a nozzle by highlighting out the surrounding area 6a of the blow hole 6. Likewise, as shown in Figure 4 (b ), a nozzle 6b may be attached as a separate member to the diffuser pipe 7. The joining position of the nozzle 6b may, for example, be in a position to rotate + 60 ° using the end as a reference (0 °) lower than the vertical direction at the time of installation on the ocean floor.
    As shown in Figure 4 (c), when using the nozzle 6b as a separate member,
    5
    10
    fifteen
    twenty
    25
    30
    its outer shape is cylindrical, but its inner shape has a nozzle surface 6ba that is made in the shape of a cone trunk (a cone with the tip suppressed in a horizontal plane). One such nozzle 6b can be made of rubber or a synthetic resin.
    In order to avoid the reverse flow of filtration sand, the present invention may use a structure in which the diffuser pipe 7 is bent in a wave form, so that the position of the blow holes 6 is the vertical position lower when installed on the ocean floor.
    Specifically, by folding the diffuser pipe 7 in a wave form, as shown in Figures 5 (a) - 5 (c), for example, the position in which the blow holes 6 are arranged is the lowest vertical position when installed on the ocean floor. If this is done, then even if there is an inverse flow of filtration sand to the diffuser pipe 7, it is possible to easily discharge the sand to the outside during the next wash because the filtration sand is guided towards the blow holes 7 by the inclination.
    Furthermore, as shown in Figure 6, if the diffuser pipe 7 is bent in a wave form, a plurality of units 7a can be connected to form a joint type diffuser pipe. In the example shown in Figure 6, the same effect of easily discharging the external filtration shown in Figure 5 is achieved simply by using a specified number of connected diffuser pipes as shown in Figure 6 (b) and in the Figure 6 (c), which have units of the type illustrated in Figure 6 (a).
    If the burial depth of the diffuser pipe 7 (the distance from the surface of the filtration sand layer 2 to the blow holes 6 of the diffuser pipe 7) is too shallow, there is a risk that the diffusion pipe 7 will result exposed in the ocean, because the air bubbles 10 are blown only directly above the blow holes 6, without being dispersed within the filtration sand layer 2, and also because the ocean floor is dragged by waves and ship traffic. On the other hand, if the burial depth of the diffuser pipe 7 is too large, uniform cleaning is impossible, because the air bubbles 10 are not blown towards the top of the filtration sand layer 2 in the ocean, due to the greater resistance of the filtration sand layer 2, and this results in the air being trapped within the filtration sand layer 2.
    5
    10
    fifteen
    twenty
    25
    30
    Therefore, the present inventors carried out experiments to determine the area to which the air bubbles 10 are blown, in which a group of diffuser pipes is installed (diameter of 2 mm blow holes, joint angle of holes of 30 ° blow, passage of 300 mm blow holes, and distance between 300 mm diffuser pipes) at burial depths of 100 mm, 500 mm and 1000 mm. Figure 7 shows the results of these tests, with an image of the filtration sand layer 2 seen from a plan orientation.
    If the burial depth is 100 mm (see Figure 7 (a), the depth is too shallow, so that the distance at which the air is blown from the blow holes 6 is insufficient, resulting in the air bubbles 10 come out mainly only above the blow holes 6, the air bubbles 10 being also large in size, therefore there is an area in which the air bubbles 10 are not blown between the diffuser pipes 7 , making it impossible to clean evenly within the cleaning zone.
    If the burial depth is 300 mm (see Figure 7 (b), the area within which the air bubbles are blown 10 tends to make it slightly difficult to diffuse the air bubbles, and tends to easily blow large bubbles of air above the blow holes 6, compared to a burial depth of 500 mm, as described below, but it was seen that air bubbles are uniformly blown within the general area in which they are installed diffuser pipes 7.
    It was determined that if the burial depth is 500 mm (see Figure 7 (c)), the air bubbles 10 are blown more evenly in the area where the diffuser pipes 7 are installed.
    If the burial depth is 1000 mm (see Figure 7 (d)), the resistance increases because the layer of filtration sand 2 is thicker, and the air bubbles 10 are easily blown from the proximity of a wall and a group of pipes that are outside the area within which the diffuser pipes 7 are installed, making it impossible to clean evenly the area within which the diffuser pipes 7 are installed.
    TABLE 1 summarizes the results of the tests described above, as well as the results for burial depths of 200 mm and 700 mm, and evaluates these
    results. The evaluation is recorded in 5 levels, with a score of "5" as the best and a score of "1" for the worst.
    TABLE 1
     Burial Depth  State of Bubbles Punctuation
     100 mm  The bubbles appear directly above the bubble holes, so that there is an area towards which air bubbles are not blown between the diffuser pipes. It is not possible to clean evenly within the cleaning zone. one
     200 mm  The results are not as favorable as for a depth of 300-500 mm, but the bubbles are blown towards the area where the diffuser pipes are installed, making them usable for cleaning. 3
     300 mm  Bubbles were determined that were blown approximately uniformly towards the area where the diffuser pipes are installed. 4
     500 mm  Bubbles were determined that were blown in the most uniform way towards the area where the diffuser pipes are installed. 5
     700 mm  The results are not as favorable as for a burial depth of 300-500 mm, but bubbles are blown into the area where diffuser pipes are installed, making them usable for cleaning. 3
     1000 mm  Bubbles are blown outside the area where the diffuser pipes are installed. It is impossible to clean evenly in the area where the diffuser pipes are installed. one
    5
    10
    fifteen
    twenty
    25
    30
    TABLE 1 shows that it is advantageous that the burial depth of the diffuser pipe 7 is between 200 mm and 700 mm, for a score of "3" or greater, and that it is more advantageous than the burial depth of the diffuser pipe 7 is between 300 mm and 500 mm, for a score of "4" or greater.
    A description is given below of the interval between diffuser pipes 7. If a plurality of diffuser pipes 7 are buried and aligned close to each other horizontally, as in the example described in Figure 1, the interval between diffuser pipes 7 is advantageously between 100-600 mm.
    If the diffuser pipes 7 are arranged too close together, the diffuser pipes 7 prevent the infiltration of seawater, so that there is the problem of a reduction in the proportion of water intake. Conversely, if the diffuser pipes 7 are arranged too far apart, there is a problem that the air bubbles are not blown uniformly towards the sand layer 2 of filtration. Studies carried out by the present inventors show that an appropriate distance for the interval between diffuser pipes 7 is 100-600 mm, a distance within which the aforementioned problems do not occur.
    A description is given below of the step to which the blow holes are arranged 6. If a plurality of blow holes 6 are arranged in a single diffuser pipe 7, as in the example shown in Figure 1, the step to which they are The blow holes 6 are advantageously arranged in the range of 100-700 mm.
    If the passage at which the blow holes 6 are arranged is too small, a larger volume of compressed air must be fed from the compressed air supply device 8. Conversely, if the passage at which the blow holes 6 are arranged is too large, the cleaning area is scarce. Studies carried out by the present inventors show that an appropriate distance for the interval between diffuser pipes 7 is between 100 and 700 mm, a distance within which the aforementioned problems do not occur.
    In addition, the present inventors carried out experiments to determine the area in which air bubbles are blown by each blow hole, in cases where groups of diffuser pipes are arranged (diameter of blow holes 2 mm, angle of
    5
    10
    fifteen
    twenty
    25
    30
    union of 30 ° blow holes and volumetric air flow of 10 L / min per hole) at a burial depth of 300 mm and 500 mm. Figure 8 shows the results of these experiments.
    The results of the previous experiments showed that in the case of any depth, as the volume of air fed to the diffuser pipes 7 increased, an area 12 increased within which air bubbles 10 were blown from the blow holes 6, of so that, finally, the axial direction of the diffuser pipe 7 formed the major axis of an ellipse.
    It was thought that the reason why the zone 12, within which air bubbles 10 were blown from the blow holes 6, forms an ellipse, is that the porosity of the filtration sand layer 2 is high in the proximity of the diffuser pipes 7, so that the air bubbles migrate easily, and the air bubbles 10 adhere to the diffuser pipes 7, and move to the lake in the axial direction of the diffuser pipes 7.
    If the burial depth is 300 mm (see Figure 8 (a)), the size of the elliptical zone 12 towards which the bubbles 10 are blown, has a length of the major axis L1 that is 35-40 cm, and a length of the minor axis L2 that is 25-30 cm. On the other hand, if the burial depth is 500 mm (see Figure 8 (b)), the length of the major axis L1 is 40-45 cm and the length of the minor axis is 30-35 cm.
    In accordance with the experiments performed by the present inventors, it was determined that the area into which the air bubbles 10 are blown from a blow hole 6 also depends on the burial depth of the diffuser pipes 7. It was thought that this is because the greater the depth of burial of the diffuser pipes 7, the wider the area towards which the air bubbles 10 diffuse until they reach the surface of the filtration sand layer 2.
    Based on the above findings, it is advantageous that the interval between the diffuser pipes is between 100 mm and 300 mm if the burial depth of the diffuser pipes 7 is between 100 mm and 300 mm.
    Furthermore, if the burial depth of the diffuser pipes 7 is between 100 mm and 300 mm, the passage at which the blow holes 6 are arranged is advantageously in the range of 150-500 mm.
    5
    10
    fifteen
    twenty
    25
    30
    In addition, the present inventors carried out experiments to determine the relationship between the volumetric flow rate of air fed to the group of diffuser pipes (diameter of 2 mm blow holes, union angle of blow holes 30 °, passage of blow holes 300 mm, distance between diffuser pipes of 300 mm, and burial depth of 500 mm), and the area to which air bubbles are blown. Figure 9 (a) to Figure 9 (c) show the results of tests performed under conditions where the volumetric air flow rate was 80 L / min, 150 L / min and 300 L / min, and the images are seen from an orientation in plan.
    It was determined that as the volumetric air flow increases, the area towards which the air bubbles 10 are blown gradually increases, until the volumetric flow of air fed to the diffuser pipes 7 reaches 150 L / min (10 L / min for each blow hole).
    It was determined that the air bubbles are uniformly diffused towards the area in which the diffuser pipes 7 are installed, when the volumetric flow rate of air fed to the diffuser pipes 7 is in the range of 150-200 L / min (10-13 L / min for each blow hole).
    It was determined that the diameter of the bubbles 10 that are blown increases if the volumetric flow rate of the air fed to the diffuser pipes 7 exceeds 200 L / min (13 L / min for each blow hole). If the diameter of the air bubbles 10 increases, there is a risk that the filtration sand will be more easily blown up with the air bubbles 10, causing the filtration sand to flow out.
    Based on the above findings, it is advantageous that the volumetric flow rate of air fed from the compressed air supply device 8 to the diffuser pipes 7 is 10-13 L / min for each blow hole under the aforementioned conditions (diameter of 2 mm blow holes, 30 ° blow holes union angle, 300 mm blow holes, distance between diffuser pipes 300 mm, and burial depth of 500 mm). However, it was predicted that the range of the volumetric flow rate would fluctuate if the passage of the blow holes and the interval between the diffuser pipes changes with the other conditions. Therefore, the volumetric flow rate is advantageously between 2 L / min and 30 L / min.
    5
    10
    fifteen
    twenty
    25
    30
    Because the present invention, as described above, uses compressed air as a fluid that acts on the filtration sand, a smaller size, smaller scale construction, and a lower operating cost than a conventional system can be achieved. that injects fresh water or seawater into the filtration sand layer. Furthermore, the present invention is capable of reliably preventing the clogging of the sand filtration layer by regularly supplying air from the compressed air supply device to the diffuser pipe.
    The present invention is not limited to the example described above, and the preferred embodiment can, of course, be advantageously modified within the scope of the technical ideas set forth in the claims.
    For example, in the example described above, an example was explained in which sediments blown upwards from the filtration sand layer are discharged outside the system of the water intake zone by waves or streams when air is fed from the compressed air supply device 8 for reverse cleaning of the filtration sand layer, but the means for removing sediments are not limited thereto. For example, a configuration can be used in which a suction pipe connected to a suction pump is installed above the filtration sand layer 2, and the sediments that are blown up from the filtration sand layer are suctioned by the suction pipe.
    In addition, in the example described above, a configuration used to prevent the reverse flow of filtration sand from the blow holes to the diffuser pipes, and in which the blow holes are arranged only in a downwardly oriented range from the horizontal direction when installed on the ocean floor, and a configuration in which the blow holes themselves are configured in the form of a nozzle (see Figure 4 (a)), as well as a configuration in which the nozzles are joined to the blow holes as separate members (see Figure 4 (b)), but the means to prevent the reverse flow of filtration sand are not limited thereto.
    For example, as shown in Figure 10, the reverse flow of filtration sand can be prevented by covering the diffuser pipe 7 with a net 13 having holes smaller than the diameter of the filtration sand. Alternatively, the reverse flow of filtration sand
    It can be avoided by joining a porous ring-shaped member 14 with holes smaller than the diameter of the filter sand, in the position of the blow holes 6 of the diffuser pipe 7, as shown in Figure 11.
    When using any of the above configurations, there is no longer a need to limit the disposition interval of the blow holes 6 to a side that is less than the horizontal direction, because even if the blow holes 6 are arranged in Any position in the entire circumference of the diffuser pipe 7, it is possible to avoid the reverse flow of filtration sand. It should be noted that although Figure 10 shows an example in which the network 13 is connected around the entire diffuser pipe 7, the network 13 10 can be joined only in positions where the blow holes 6 are present , as in the example illustrated in Figure 11.
    Explanation of the reference symbols
     1 Apparatus for the admission of water infiltration will be
     2 Filtration sand layer
     fifteen  3 Layer of gravel support
     4 Water intake pipe
     5 Cleaning system
     6 Blow hole
     7 Diffuser pipe
     twenty  8 Compressed air supply device
    5
    10
    fifteen
    twenty
    25
    30

    1. A cleaning system used with an apparatus for an admission of seawater infiltration that performs an admission of seawater, by means of a water intake pipe buried in a layer of gravel support, after the seawater has been infiltrated through the filtration sand layer and the support gravel layer on an ocean floor, the cleaning system being configured to remove blockage sediments from the filtration sand layer and clean the layer of filtration sand, including the cleaning system:
    a diffuser pipe buried in the support gravel layer, the diffuser pipe having blow holes; Y
    a compressed air supply device configured to feed air
    to the diffuser pipe,
    in which the air is blown through the blow holes to agitate the filtration sand of the filtration sand layer, to remove sediments that have been trapped within the filtration sand layer or accumulated thereon.
    2. The cleaning system according to claim 1, wherein a burial depth of the diffuser pipe is in a range of 200 mm to 700 mm.
    3. The cleaning system according to claim 1 or 2, wherein a plurality of diffuser pipes are buried in a range between 100 mm and 600 mm.
    4. The cleaning system according to any of claims 1-3, wherein a step in which the blow holes are arranged is in the range of 100 mm to 700 mm.
    5. The cleaning system according to any of claims 1-4, wherein the blow holes are arranged in a range of positions such that the blow holes are turned down from their horizontal position when placed on the ocean floor.
    6. The cleaning system according to any of claims 1-5, wherein the diameter of the blow holes is 5 times smaller than the average particle size of the filter sand.
    权利要求:
    Claims (4)
    [7]
    7. The cleaning system according to any of claims 1-6, wherein the blow holes are arranged in positions that do not interfere with the blow holes of another proximal diffuser pipe.
    [8]
    8. The cleaning system according to any of claims 1-7, in the
    5 that the blow holes are configured in the form of a nozzle that
    protrudes outward from the diffuser pipe.
    [9]
    9. The cleaning system according to any of claims 1-8, wherein the diffuser pipe is bent in a wave form, so that the position of the blow holes is the lowest vertical position when it is 10 installed on the ocean floor.
    [10]
    10. The cleaning system according to any of claims 1-9, wherein a volumetric flow rate of air fed from the pressurized air supply device to the diffuser pipe is in the range of 2 L / min to 30 L / min for each blow hole.
    fifteen
    image 1
    类似技术:
    公开号 | 公开日 | 专利标题
    ES2554297A2|2015-12-17|Cleaning system for sand filtration layer
    ES2694436T3|2018-12-20|Outlet tank for a fish cage
    CN102783929A|2012-11-21|Hand-held submersible pool and spa power cleaner
    JP2013160041A|2013-08-19|Screen water intake cleaning system using variable flow of non-compressive liquid
    JP2010119904A|2010-06-03|Pneumatic water pump apparatus
    ES2738575T3|2020-01-23|Sprinkler base
    CN203860251U|2014-10-08|Oxygenation device for fishpond
    ES2365027T3|2011-09-20|MIXING DEVICE.
    CN205346880U|2016-06-29|Impeller and have its water albumen separator
    CN202181547U|2012-04-04|Device for collecting sewage on water surface
    WO2019208962A1|2019-10-31|Small microbubble generation device for fish farm
    CA2726970A1|2011-03-22|Counter current supersaturation oxygenation system
    JP2011167674A|2011-09-01|Underwater aeration device
    KR20180098038A|2018-09-03|Green tide removal device
    KR101221116B1|2013-01-11|Radial aeration apparatus having fountain
    JP2007069096A|2007-03-22|Wet dust precipitator
    CN209396908U|2019-09-17|A kind of underground conservation pool ecological circulation one purification of water quality processing structure
    CA3053166A1|2018-08-16|Fluid flow control apparatus
    RU2298063C1|2007-04-27|Streamlined fish passing mouth
    KR200328793Y1|2003-10-01|Aquarium air drop gushing system
    CN213159968U|2021-05-11|Follow-up water absorption assembly and material taking machine
    ES2595053T3|2016-12-27|Aquarium water purification equipment
    KR101208816B1|2012-12-06|Water purification apparatus in river using the micro bubble
    JP2008150816A|2008-07-03|Suspended matter extracting device
    KR101733953B1|2017-05-10|Suction duck for sludge
    同族专利:
    公开号 | 公开日
    WO2014091828A1|2014-06-19|
    AU2013358367B2|2016-12-08|
    AU2013358367A1|2015-06-18|
    JP6047003B2|2016-12-21|
    JP2014117643A|2014-06-30|
    US20150314221A1|2015-11-05|
    CN104822431A|2015-08-05|
    CN104822431B|2016-11-23|
    ES2554297R1|2016-02-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR557656A|1922-10-20|1923-08-13|Method and device for cleaning large-area sand filters|
    US2555201A|1947-02-26|1951-05-29|Carl H Nordell|Diffuser tube|
    JPS541621Y2|1974-11-06|1979-01-24|
    US4223843A|1978-03-16|1980-09-23|Texaco Inc.|Air distribution apparatus|
    US4322299A|1980-08-18|1982-03-30|General Filter Company|Method of simultaneous air-water wash of multiple-media filters|
    JPH0143566B2|1981-09-11|1989-09-21|Kurita Water Ind Ltd|
    JPS6221286Y2|1982-03-12|1987-05-29|
    US4976873A|1989-12-14|1990-12-11|Zimpro/Passavant Inc.|Pulsing portions of a filter cell to extend a filter run|
    JPH07289813A|1994-04-27|1995-11-07|Hitachi Chem Co Ltd|Waste water treatment device|
    JP2000186351A|1998-12-22|2000-07-04|Kumagai Gumi Co Ltd|Penetration-type water intake method|
    US20080193340A1|2007-02-09|2008-08-14|Cocco Raymond A|Fluidized bed sparger|
    US8454841B2|2010-05-11|2013-06-04|Roberts Marketing De, Inc.|Method of filtering water or wastewater|
    CN201862301U|2010-11-19|2011-06-15|北京京诚科林环保科技有限公司|Blast furnace slag washing water filter|
    CN102284202A|2011-05-27|2011-12-21|青岛东宇水处理设备开发有限公司|Water filter equipment|
    JP2012246711A|2011-05-30|2012-12-13|Hitachi Zosen Corp|Seawater percolation and filtration method, and device for preventing sand layer surface from clogging|
    JP5822623B2|2011-09-30|2015-11-24|日立造船株式会社|Seawater osmotic filtration method and osmotic water intake unit|
    CN102626564A|2011-11-09|2012-08-08|高全财|Novel multimedium filter for water treatment|
    JP5869375B2|2012-03-05|2016-02-24|日立造船株式会社|Seawater infiltration device|JP2015157233A|2014-02-21|2015-09-03|日立造船株式会社|Seawater permeation intake apparatus|
    JP6530205B2|2015-03-12|2019-06-12|日立造船株式会社|Seepage water intake system|
    CN104878801B|2015-05-15|2016-06-22|甘肃省地质环境监测院|Convenient gravel cobble permeable layer, its construction process and the cleaning method thereof cleaned|
    JP6553433B2|2015-07-10|2019-07-31|水ｉｎｇ株式会社|Dispersing device, upward-flowing reaction device having the same, and operating method thereof|
    CN105148575A|2015-09-30|2015-12-16|胡小弟|Backwash device|
    CN111636543A|2020-06-03|2020-09-08|陈阳利|Self-driven shunting screening road drainage device|
    法律状态:
    2017-06-13| FC2A| Grant refused|Effective date: 20170607 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2012-273514|2012-12-14|
    JP2012273514A|JP6047003B2|2012-12-14|2012-12-14|Filtration sand layer cleaning system|
    [返回顶部]