CN109351015A - A kind of horizontal sand warehouse water treatment plant - Google Patents
A kind of horizontal sand warehouse water treatment plant Download PDFInfo
- Publication number
- CN109351015A CN109351015A CN201811307856.8A CN201811307856A CN109351015A CN 109351015 A CN109351015 A CN 109351015A CN 201811307856 A CN201811307856 A CN 201811307856A CN 109351015 A CN109351015 A CN 109351015A
- Authority
- CN
- China
- Prior art keywords
- sand warehouse
- horizontal sand
- water
- filter plate
- water filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 239000004576 sand Substances 0.000 title claims abstract description 103
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000002002 slurry Substances 0.000 abstract description 7
- 108091006146 Channels Proteins 0.000 description 29
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 102000011899 Aquaporin 2 Human genes 0.000 description 1
- 108010036221 Aquaporin 2 Proteins 0.000 description 1
- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The present invention provides a kind of horizontal sand warehouse water treatment plants, comprising: drainage channel, the drainage channel are formed on the side wall of horizontal sand warehouse and are located at horizontal sand warehouse side bottom, and the side of close horizontal sand warehouse inner wall is fixed with block frame in drainage vias inner walls；Water filter plate, the water filter plate and block frame card set fixation；Strobe for filtrating water, the strobe for filtrating water are fixed on the inner wall of horizontal sand warehouse, and be vertically movably covered on water filter plate towards the side surface in sand warehouse, wherein when the horizontal sand warehouse is for when storing dry tailings, the strobe for filtrating water to be closed；When the horizontal sand warehouse is for when storing last mortar, the strobe for filtrating water is opened, the moisture in the last mortar is discharged from drainage channel by the water filter plate, it has simplified structure and is easily achieved, it enables to horizontal sand warehouse while meeting the needs for storing dry tailings and last mortar, the concentration of filling slurry is improved, and strainer can be cleaned in real time without disassembly repeatedly.
Description
Technical field
The present invention relates to mining last mortar filling technique fields, specifically, being related to a kind of horizontal sand warehouse drainage dress
It sets.
Background technique
In common mining technique, need by filling method in mine down-hole support country rock, the process be by
Filling aggregate adds water that the mortar of certain mass concentration is made, then in the way of pipeline, chute or drilling, by mortar with
The mode of gravity flow is delivered to underground filling position.The mortar of construction site is generally comprised according to its means of transportation and is transported by waterpower
Low concentration last mortar, and by the dry tailings of vehicle transport, under the prior art, the last mortar transported for waterpower is using vertical
Formula sand warehouse is stored and is concentrated, and the dry tailings of vehicle transport is then stored using horizontal sand warehouse.
A kind of water treatment plant based on horizontal sand warehouse is proposed under the prior art, is met simultaneously with realizing by single device
Store the requirement of mortar and dry tailings.The horizontal sand warehouse water treatment plant is in opening up hole on sand bar bottom bulkhead, then at the hole
Two sides block flange is set, and closed towards one end on the inside of the horizontal sand warehouse using closed steel plate in the hole, should
Equally distributed filtration hole is formed on steel plate；Metal screen, metal is arranged towards one end on the outside of the horizontal sand warehouse in the hole
Strainer is fixed by a fixed strainer, in this way, when last mortar flows into inside horizontal sand warehouse, through hole and is set on hole
Metal screen is filtered last mortar.
By constantly studying and practicing, the horizontal sand warehouse water treatment plant under this kind of above-mentioned prior art throws away that there are more
Technical problem:
1), when the horizontal sand warehouse water treatment plant is for when storing dry tailings, dry tailings easily to be caused by metal screen
Metal screen blocking；On the other hand, Horizontal sand warehousing has dry tailings and meets with rainwater weather or by external water to horizontal
When sand warehouse carries out washing away cleaning, rainwater or cleaning water are entered inside sand warehouse by the filter opening of metal screen, then cause to store
There are the dry tailings water inlets inside sand warehouse；
2) excessive draining, is prevented for when storing last mortar, lacking effectively means when the horizontal sand warehouse water treatment plant,
So that after the concentration for the last mortar being stored in it reaches filling needs, since the presence of metal filter screen still can make tailings
Moisture in slurry continues to be lost, so that this kind of horizontal sand warehouse water treatment plant is difficult to meet the requirement of storage last mortar in fact；
3), in above-mentioned this horizontal sand warehouse water treatment plant, closed steel plate and fixed strainer pass through steel plate to protect gold
Belong to strainer, such connection and fixed form are more heavy, and the steel plate that water treatment plant is used to fix strainer is convex by block is arranged in
Edge and the bolt between it are fixed, and are under the environment of humidity due to long-term trap drainage, bolt is easy to appear corruption
Rotten or even failure then eventually leads to the last mortar leakage of storage.
In view of this, should be improved to the prior art, to solve the above-mentioned technical problems in the prior art.
Summary of the invention
In order to solve the above-mentioned technical problem the present invention makes, the purpose is to provide it is a kind of with simplified structure and
It is easily achieved, enables to horizontal sand warehouse while meeting the needs for storing dry tailings and last mortar, improve the concentration of filling slurry,
And it is not necessary that disassembly can be in real time to the horizontal sand warehouse water treatment plant of the cleaning of strainer repeatedly.
To achieve the goals above, the present invention provides a kind of horizontal sand warehouse water treatment plant, the horizontal sand warehouse drainage dresses
Setting includes: drainage channel, which is formed on the side wall of horizontal sand warehouse and is located at horizontal sand warehouse side bottom, the filter
Side on aquaporin inner wall close to horizontal sand warehouse inner wall is fixed with block frame；Water filter plate, the water filter plate and the retaining edge
Frame card sets fixation；Strobe for filtrating water, the strobe for filtrating water are fixed on the inner wall of horizontal sand warehouse, and vertically movably lid is set
In the inner surface of the water filter plate, wherein when the horizontal sand warehouse is for when storing dry tailings, the strobe for filtrating water to be closed；
When the horizontal sand warehouse is for when storing last mortar, the strobe for filtrating water opening will be in the last mortar by the water filter plate
Moisture from drainage channel be discharged.
Preferably, the horizontal sand warehouse water treatment plant may include the multiple drainages for being uniformly distributed in its surrounding sidewall bottom
Channel.
Preferably, locked groove can be respectively formed on four sides of the block frame, it can be on the frame of the water filter plate
It is respectively arranged with and the one-to-one lock tongue of locked groove, wherein, can be with when the water filter plate and the block frame card set fixed
Each lock tongue is controlled by knob, is inserted it into the corresponding locked groove, so that the water filter plate is fixed.
Preferably, the strobe for filtrating water can be bulkhgead gate, and the strobe for filtrating water can be connected to motor, and pass through motor
It can control being turned on or off for the strobe for filtrating water.
Preferably, the water filter plate may include strainer, can be respectively arranged in the both side surface of the strainer and paste therewith
The grid of conjunction could be formed with strainer open channels on one side surface of the water filter plate, wherein when installing the strainer,
The strainer is inserted into fixation out of described strainer open channels.
It is further preferred that the strainer open channels can be by being formed in three grooves of one side surface of water filter plate
It surrounds.
Further preferably, the mesh number of the strainer can be in the range of 200 mesh to 300 mesh.
Preferably, spray head has can be set towards one end on the outside of horizontal sand warehouse in the drainage channel, which can be with
Water pipe connection, the spray head is towards the water filter plate, wherein the spray head to wash away the water filter plate according to predetermined period,
It can prevent the water filter plate from blocking.
As described above with practice it is found that in horizontal sand warehouse water treatment plant of the present invention, in horizontal sand warehouse
Multiple equally distributed drainage channels are formed on bottom, water filter plate and strobe for filtrating water are provided in drainage channel, strobe for filtrating water is along vertical
Histogram is to being movably arranged at water filter plate towards on the side surface inside sand warehouse, in this way, when horizontal sand warehouse is dry for storing
It, can be by closing strobe for filtrating water, so that outside rainwater or water for cleaning will not enter sand by drainage channel when tailings
Inside storehouse, the dry tailings watered and wetting inside sand warehouse is prevented；Drainage channel is provided with spray head towards the side outside horizontal sand warehouse,
Spray head is connect with water pipe, and towards water filter plate on the inside of drainage channel, in this manner it is achieved that water filter plate is rinsed in time, with
It avoids frequently replacing strainer；In addition, water filter plate is logical by being set to drainage in horizontal sand warehouse water treatment plant of the present invention
Block frame in road is fixed, and locked groove is formed on four sides of block frame, is formed on the frame of water filter plate with locked groove one by one
Corresponding lock tongue, by the connection of locked groove and lock tongue so that the installation of water filter plate is fixed more firm, water filter plate includes strainer, and
Strainer is reinforced by grid, forms open channels on a side surface of water filter plate so that strainer insertedly with water filter plate
Connection.In conclusion horizontal sand warehouse water treatment plant of the present invention has simplified structure and is easily achieved, enable to crouch
Formula sand warehouse meets the needs for storing dry tailings and last mortar simultaneously, and can be improved the concentration of filling slurry, and without tearing open repeatedly
Unloading then can further ensure the quality of filling slurry in real time to the cleaning of strainer.
Detailed description of the invention
Fig. 1 is side view, shows horizontal sand warehouse water treatment plant side structure described in one embodiment of the present of invention；
Fig. 2 is cross-sectional view, the cross-section structure in the direction A-A of horizontal sand warehouse water treatment plant shown in FIG. 1；
Fig. 3 is schematic diagram, shows the structure of block frame in horizontal sand warehouse water treatment plant shown in FIG. 1；
Fig. 4 schematic diagram shows the structure of water filter plate in horizontal sand warehouse water treatment plant shown in FIG. 1.
Specific embodiment
The embodiment of horizontal sand warehouse water treatment plant of the present invention described below with reference to the accompanying drawings.This field it is common
Technical staff will recognize, without departing from the spirit and scope of the present invention, can use a variety of different modes pair
Described embodiment is modified.Therefore, attached drawing and description are regarded as illustrative in nature, rather than are wanted for limiting right
The protection scope asked.In addition, in the present specification, attached drawing is drawn not in scale, and identical appended drawing reference indicates identical
Part.
Fig. 1 is side view, shows horizontal sand warehouse water treatment plant side structure described in one embodiment of the present of invention.
Fig. 2 is cross-sectional view, the cross-section structure in the direction A-A of horizontal sand warehouse water treatment plant shown in FIG. 1.As shown in Figure 1 to Figure 2, at this
The horizontal sand warehouse water treatment plant as described in the examples of invention includes eight drainage channels being formed on horizontal sand warehouse side wall 1
2, which is connected to the inside and outside of horizontal sand warehouse, ruler along the direction extension perpendicular to horizontal sand warehouse side wall 1
Very little is 800 millimeters * 800 millimeters * 300 millimeters.Drainage channel 2 is located at horizontal sand warehouse side bottom, and in other realities of the invention
It applies in example, multiple equally distributed filters can be opened up in two side bottoms of horizontal sand warehouse according to specific filling needs and specification
Aquaporin 2.Drainage channel 2 is provided with spray head 3 towards one end on the outside of horizontal sand warehouse, which is connected to water pipe 4, and spray head 3
Towards water filter plate 5, in this way, may be implemented in real time to wash away water filter plate 5 by opening spray head 3, to prevent its blocking, then
Influence the filter effect in drainage channel.3 gauge pressure of spray head used in the examples of the invention is 0.3MPa.
Fig. 3 is schematic diagram, shows the structure of block frame in horizontal sand warehouse water treatment plant shown in FIG. 1.Extremely referring to Fig. 1
Fig. 3, the side on 2 inner wall of drainage channel close to horizontal sand warehouse inner wall are fixedly installed block frame 6, and block frame uses square steel
It is made, water filter plate 5 is fixedly installed on block frame 6, is additionally provided with strobe for filtrating water 7 on horizontal sand warehouse inner wall, the strobe for filtrating water 7
Vertically movably be covered on water filter plate 5 towards on the side surface in sand warehouse.
Specifically, being respectively formed with locked groove 61 on four sides of block frame 6, and it is respectively set on the frame of water filter plate 5
Have with the one-to-one lock tongue 51 of locked groove 61, in this embodiment of the invention, the diameter of locked groove 61 is 12 millimeters, lock tongue 51
Diameter is 10 millimeters, and lock tongue 51 can be controlled by knob 52, when water filter plate 5 sets fixed with the card of block frame 6, passes through knob
Each lock tongue 51 is controlled, is inserted it into corresponding locked groove 61, so that the installation of water filter plate 5 is fixed.Strobe for filtrating water 7 uses
Motor driven, in this embodiment of the invention, strobe for filtrating water 7 are electronic stock bulkhgead gate, pass through motor control drainage lock
Door 7 opens or closes, when horizontal sand warehouse prevents external rainwater or clear for when storing dry tailings, closing strobe for filtrating water 7
Wash water is entered inside sand warehouse by drainage channel 2, when storing last mortar, and can open strobe for filtrating water, logical by drainage
Road is filtered draining.
Fig. 4 schematic diagram shows the structure of water filter plate in horizontal sand warehouse water treatment plant shown in FIG. 1.Show as shown in Figure 1 to Figure 4,
In this embodiment of the invention, water filter plate 5 includes a strainer 53, is respectively arranged in the both side surface of the strainer 53 and pastes therewith
Fixed grid 54 is closed, grid 54 is made of aluminum alloy material, and having a size of 780 millimeters * 780 millimeters * 50 millimeters, grid 54 is risen
Reinforcement effect is formed with strainer open channels 55 on one side surface of water filter plate 5, and in this embodiment of the invention, strainer is spacious
Mouth channel 55 is surrounded by three grooves 551 for being formed in a side surface of water filter plate 5, in this way, strainer 53 can be from strainer opening
Insertion is fixed in channel 55.In this embodiment of the invention, the mesh number of strainer 53 is 200 mesh, in other implementations of the invention
In example, the mesh number of strainer 53 is in the range of 200 mesh to 300 mesh.In this embodiment, strainer 53 is metal screen, and use is resistance to
Corrode the anti abrasive stainless steel diagonal screen for tiltedly knitting 200 mesh to 300 mesh, having a size of 750 millimeters * 750 millimeters.
As described above with practice it is found that in horizontal sand warehouse water treatment plant of the present invention, in horizontal sand warehouse
Multiple equally distributed drainage channels are formed on bottom, water filter plate and strobe for filtrating water are provided in drainage channel, strobe for filtrating water is along vertical
Histogram is to being movably arranged at water filter plate towards on the side surface in sand warehouse, in this way, when horizontal sand warehouse is for storing dry tail
It, can be by closing strobe for filtrating water, so that outside rainwater or water for cleaning will not enter sand warehouse by drainage channel when sand
Inside prevents the dry tailings watered and wetting inside sand warehouse；Drainage channel is provided with spray head towards the side outside horizontal sand warehouse, spray
Head is connect with water pipe, and towards water filter plate on the inside of drainage channel, in this manner it is achieved that being rinsed in time to water filter plate, to keep away
Exempt from frequently to replace strainer；In addition, water filter plate is by being set to drainage channel in horizontal sand warehouse water treatment plant of the present invention
Interior block frame is fixed, and locked groove is formed on four sides of block frame, is formed on the frame of water filter plate a pair of with locked groove one
The lock tongue answered, by the connection of locked groove and lock tongue so that the installation of water filter plate is fixed more firm, water filter plate includes strainer, and is filtered
Netcom crosses grid and is reinforced, and forms open channels on a side surface of water filter plate, so that strainer insertedly connects with water filter plate
It connects.In conclusion horizontal sand warehouse water treatment plant of the present invention has simplified structure and is easily achieved, enable to horizontal
Sand warehouse meets the needs for storing dry tailings and last mortar simultaneously, and can be improved the concentration of filling slurry, and without dismantling repeatedly
The quality of filling slurry then can be further ensured in real time to the cleaning of strainer.
Describe horizontal sand warehouse water treatment plant according to the present invention in an illustrative manner above with reference to attached drawing.But
It will be appreciated by those skilled in the art that can also not departed from for the horizontal sand warehouse water treatment plant that aforementioned present invention is proposed
Various improvement are made on the basis of the content of present invention.Therefore, protection scope of the present invention should be by appended claims
Content determines.
Claims (8)
1. a kind of horizontal sand warehouse water treatment plant, which is characterized in that the horizontal sand warehouse water treatment plant includes:
Drainage channel, the drainage channel are formed on the side wall of horizontal sand warehouse and are located at horizontal sand warehouse side bottom, the drainage
Side in vias inner walls close to horizontal sand warehouse inner wall is fixed with block frame；
Water filter plate, the water filter plate and the block frame card set fixation；
Strobe for filtrating water, the strobe for filtrating water are fixed on the inner wall of horizontal sand warehouse, and are vertically movably covered on described
Water filter plate towards the side surface in sand warehouse, wherein
When the horizontal sand warehouse is for when storing dry tailings, the strobe for filtrating water to be closed；When the horizontal sand warehouse is for storing tail
When mortar, the strobe for filtrating water is opened, and the moisture in the last mortar is discharged from drainage channel by the water filter plate.
2. horizontal sand warehouse water treatment plant as described in claim 1, which is characterized in that the horizontal sand warehouse water treatment plant includes equal
The even multiple drainage channels for being distributed in its surrounding sidewall bottom.
3. horizontal sand warehouse water treatment plant as described in claim 1, which is characterized in that distinguish shape on four sides of the block frame
At there is locked groove, it is respectively arranged on the frame of the water filter plate and the one-to-one lock tongue of locked groove, wherein
When the water filter plate and the block frame card set fixed, each lock tongue is controlled by knob, insert it into
The corresponding locked groove in so that the water filter plate is fixed.
4. horizontal sand warehouse water treatment plant as described in claim 1, which is characterized in that the strobe for filtrating water is bulkhgead gate, institute
It states strobe for filtrating water to be connected to motor, passes through being turned on or off for strobe for filtrating water described in motor control.
5. horizontal sand warehouse water treatment plant as described in claim 1, which is characterized in that the water filter plate includes strainer, the strainer
Both side surface on be respectively arranged with the grid being bonded therewith, it is logical that strainer opening is formed on a side surface of the water filter plate
Road, wherein
When installing the strainer, the strainer is inserted into fixation out of described strainer open channels.
6. horizontal sand warehouse water treatment plant as claimed in claim 5, which is characterized in that the strainer open channels are by being formed in
Three grooves for stating one side surface of water filter plate surround.
7. horizontal sand warehouse water treatment plant as claimed in claim 5, which is characterized in that the mesh number of the strainer is in 200 mesh to 300
In the range of mesh.
8. horizontal sand warehouse water treatment plant as described in claim 1, which is characterized in that the drainage channel is towards outside horizontal sand warehouse
One end of side is provided with spray head, which connect with water pipe, and the spray head is towards the water filter plate, wherein
The spray head prevents the water filter plate from blocking to wash away the water filter plate according to predetermined period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307856.8A CN109351015A (en) | 2018-11-05 | 2018-11-05 | A kind of horizontal sand warehouse water treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307856.8A CN109351015A (en) | 2018-11-05 | 2018-11-05 | A kind of horizontal sand warehouse water treatment plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109351015A true CN109351015A (en) | 2019-02-19 |
Family
ID=65344308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811307856.8A Pending CN109351015A (en) | 2018-11-05 | 2018-11-05 | A kind of horizontal sand warehouse water treatment plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109351015A (en) |
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| CN207786077U (en) * | 2017-12-18 | 2018-08-31 | 光大环保技术研究院（南京）有限公司 | A kind of sludge cleaning device |
| CN208018293U (en) * | 2018-02-08 | 2018-10-30 | 昆山奕昕电机科技有限公司 | A kind of quick screen mounting structure |
| JP2018168645A (en) * | 2017-03-30 | 2018-11-01 | 若築建設株式会社 | Filtration unit and rainwater treatment facility using the same |
| CN209317148U (en) * | 2018-11-05 | 2019-08-30 | 中冶北方（大连）工程技术有限公司 | A kind of horizontal sand warehouse water treatment plant |
-
2018
- 2018-11-05 CN CN201811307856.8A patent/CN109351015A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200338772Y1 (en) * | 2003-08-30 | 2004-01-24 | 김경호 | a filtering and bed smell preventing device for a manhole |
| CN201337845Y (en) * | 2009-01-15 | 2009-11-04 | 长沙有色冶金设计研究院 | Water treatment device used for horizontal sand tank |
| CN203648264U (en) * | 2014-01-11 | 2014-06-18 | 玉溪大红山矿业有限公司 | High-efficiency precipitation treatment pond of muddy water in ore dressing |
| CN204637742U (en) * | 2014-12-31 | 2015-09-16 | 天津渤化中河化工有限公司 | A kind of chemical sludge filtration treatment device |
| CN205399355U (en) * | 2016-02-25 | 2016-07-27 | 荣昌祥 | River course is repaiied and is prevented for engineering river course device of controlling flood |
| JP2018168645A (en) * | 2017-03-30 | 2018-11-01 | 若築建設株式会社 | Filtration unit and rainwater treatment facility using the same |
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