CN110523533A - A kind of Garbage separation equipment and its implementation for river bottom mud disposition - Google Patents
A kind of Garbage separation equipment and its implementation for river bottom mud disposition Download PDFInfo
- Publication number
- CN110523533A CN110523533A CN201910888921.9A CN201910888921A CN110523533A CN 110523533 A CN110523533 A CN 110523533A CN 201910888921 A CN201910888921 A CN 201910888921A CN 110523533 A CN110523533 A CN 110523533A
- Authority
- CN
- China
- Prior art keywords
- rubbish
- bottom mud
- river bottom
- separation chamber
- garbage
- 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
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 106
- 238000000926 separation method Methods 0.000 title claims abstract description 88
- 239000000463 material Substances 0.000 claims abstract description 76
- 238000011084 recovery Methods 0.000 claims abstract description 33
- 238000004140 cleaning Methods 0.000 claims abstract description 20
- 238000010992 reflux Methods 0.000 claims description 20
- 238000005192 partition Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000007769 metal material Substances 0.000 claims description 4
- 239000006148 magnetic separator Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000004576 sand Substances 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention proposes a kind of Garbage separation equipments for river bottom mud disposition, including vibrating screen, recovery pond positioned at vibrating screen first outlet lower part, material guide rail at the vibrating screen second outlet is set, positioned at the rubbish separation chamber of material guide rail lower part, the simultaneously material transportation machine of outside transported material is set in the rubbish separation chamber, the rubbish seperator in material transportation machine exit is set, and the cleaning separator in the rubbish separation chamber and for cleaning separation of material is set, garbage grab bucket is additionally provided with above the rubbish separation chamber.The configuration of the present invention is simple is realized conveniently, operation is recycled by three-level, the refinement to river bottom mud is realized to administer, classification recycling is carried out to the different material isolated to realize, on the one hand the regulation effect for optimizing river bottom mud, on the other hand effectively improves the resource recycling rate in river bottom mud.
Description
Technical field
The present invention relates to river regulation technical field, specific institute is related specifically to a kind of for river bottom mud disposition
Garbage separation equipment and its implementation.
Background technique
River bottom mud is the deposit of river and lake, is the important component of natural water area.After waters is contaminated, in water
Some of the contaminants can be stored in bed mud by precipitating or particulate matter absorption, discharged again under felicity condition, become secondary dirt
Dye source, this pollution are known as sediment pollution.In rivers and lakes during pollution control, mercury regulation is main difficulty
One of point, and environmental problem more generally existing at present.In the prior art, it is mainly used for the improvement of river bottom mud
It is sub-sieve, i.e., river bottom mud is extracted on the bank, then carry out vibration screening, realizes the separation of solid and liquid of sediment pollution, but
Such processing mode is primarily present following defect: (1) sub-sieve is simple, and sifting sort does not refine, cannot achieve for different solid material
Screening separation；(2) solid matter in river bottom mud is caused not can be carried out effectively classification recycling because sub-sieve operation does not refine
It utilizes, leads to the wasting of resources.
Summary of the invention
To solve the disadvantage that the above-mentioned prior art, the present invention propose that a kind of structure is simple, it is convenient to realize, are conducive to resource reclaim
The Garbage separation equipment for river bottom mud disposition utilized.
Technical solution proposed by the present invention is: a kind of Garbage separation equipment for river bottom mud disposition, including vibrating screen,
Recovery pond positioned at vibrating screen first outlet lower part is arranged in the material guide rail at the vibrating screen second outlet, is located at
The material transportation of transported material outward is arranged in the rubbish separation chamber simultaneously in the rubbish separation chamber of material guide rail lower part
The rubbish seperator in material transportation machine exit is arranged in machine, and is arranged in the rubbish separation chamber and is used for clear
The cleaning separator for washing separation of material is additionally provided in the terminal position of the rubbish seperator for drawing metal material
Magnet.
Further, reflux line and reflux pump are additionally provided in the recovery pond, described reflux line one end is located at
In the recovery pond, the other end is passed through the rubbish separation chamber, and the water in the recovery pond can pass through the reflux pump reflux
To the rubbish separation chamber.
Further, garbage grab bucket is additionally provided with above the rubbish separation chamber.
Further, the recovery pond is structure as a whole with the rubbish separation chamber, passes through partition or partition wall therebetween
It separates；Lattice object grid are set in the upper end of the partition or partition wall.
Further, the rubbish seperator is mainly made of belt feeder and magnetic separator.
Further, cleaning separator setting is mainly gentle by jet pump in rubbish separation chamber bottom
Floating pump group at.
Further, the material transportation machine is inclined in the rubbish separation chamber, and entrance is located at the rubbish
Bottom, the exit of rubbish separation chamber extend to the outside on top in the rubbish separation chamber.
Further, the material transportation machine uses stainless steel conveyor belt, is provided with non-slip groove.
Further, the single-deck vibrating screen aperture of the vibrating screen is 3.5cm, and amplitude is 5mm~8mm.
The implementation method of Garbage separation equipment as described above for river bottom mud disposition, comprising the following steps:
(1) river bottom mud is sent into vibrating screen；
(2) the lesser material of partial size enters recovery pond after shaker vibration is screened in river bottom mud；
(3) in river bottom mud the biggish material of partial size via material guide rail be sent into rubbish separation chamber；
(4) cleaning separator work, provides upward water flow and lift of gas, carries out to the material in rubbish separation chamber
Clean detached job；
(5) material after cleaning separation is divided into rubbish and surplus material, and handles as follows respectively: for isolating
The rubbish come, is cleared up by garbage grab bucket；For surplus material, transported by material transportation machine to rubbish seperator, it will be remaining
Metalliferous material and non-metallic material in material are separated.
Advantageous effects of the invention are as follows:
(1) present invention is not only simple in structure, and is realized conveniently.
(2) present invention first passes through vibrating screen and carries out screening recycling to the fine sand in river bottom mud, the materials of larger particles into
Enter to garbage reclamation pond and carry out cleaning separation again, rubbish and there will be the material of recovery value to remove, finally to separating
Material carry out metal and nonmetallic separation, operation is recycled by three-level, the refinement to river bottom mud is realized and administers, thus
It realizes and classification recycling is carried out to the different material isolated, on the one hand optimize the regulation effect of river bottom mud, on the other hand
Effectively improve the resource recycling rate in river bottom mud.
Detailed description of the invention
Accompanying drawing 1 is the structural representation of the present invention；
It is as follows to correspond to title for appended drawing reference in Fig. 1: 1, feed inlet, 2, vibrating screen, 3, recovery pond, 4, cleaning separator,
5, material transportation machine, 6, grid, 7, material guide rail, 8, garbage grab bucket, 9, rubbish separation chamber, 10, rubbish seperator, 11- magnetic
Iron, 12- reflux line, 13- reflux pump.
Specific embodiment
The present invention is further illustrated in the following with reference to the drawings and specific embodiments.
In present invention description, the temporald eixis position such as relational language "upper", "lower", "left", "right", "inner", "outside" is only
Orientation based on the figure and for ease of description simplify the present invention, be not the components must have orientation, structure
It makes, therefore is not considered as limiting the invention.
Embodiment 1
As shown in Fig. 1, it is a kind of for river bottom mud disposition Garbage separation equipment, mainly by vibrating screen, recovery pond,
Material guide rail, rubbish separation chamber, material transportation machine, cleaning separator, rubbish seperator and garbage grab bucket composition.According to above-mentioned
Structure, river bottom mud are successively handled operation three times on vibrating screen, rubbish separation chamber and rubbish seperator, are realized to river
The refinement of bed mud is administered.
Vibrating screen is mainly used for screening the fine sand of small particle, and in the present embodiment, vibrating screen single-deck vibrating screen aperture is
3.5cm, amplitude are 5mm~8mm, and those skilled in the art can also adjust or be arranged vibrating screen according to actual condition demand
Specification.Vibrating screen is obliquely installed, and those skilled in the art can be adjusted according to actual duty requirements or setting tilt angle, and one
As, vibrating screen is higher than vibration sieve outlet close to one end of feed inlet.Mud enters vibrating screen by feed inlet, and mud is in device
Upper residence time 50-60S, it should be noted that residence time those skilled in the art can be according to reality on device for mud
Operating conditions adjustment or setting, vibrating screen operation, partial size are less than after 3.5cm material is screened via shaker vibration and enter recovery pond
Recovery pond medium-fine sand, is periodically recycled, realizes the separation and recycling of the first order by recycling.Partial size is greater than in material
The material of 3.5cm is sent into rubbish separation chamber via material guide rail.
Recovery pond and rubbish separation chamber are respectively positioned on the lower part of vibration sieve outlet, specifically, recovery pond is located at vibrating screen first
Lower part is exported, the material for being less than 3.5cm for receiving partial size；Rubbish separation chamber is located at the object being arranged at vibrating screen second outlet
The lower part for expecting guide rail, the material for being greater than 3.5cm for receiving partial size.In the present embodiment, recovery pond and rubbish separation chamber are one
Body structure, the two upper opening, centre are separated using partition or partition wall, and the volume size of recovery pond and rubbish separation chamber does not make spy
It does not limit.Further, in order to avoid the material flushing between recovery pond and rubbish separation chamber, the present embodiment is in partition or partition wall
Upper end be set to lattice object grid.
Material of the partial size greater than 3.5cm realizes the separation and recycling of the second level in rubbish separation chamber.In rubbish separation chamber
It is provided with cleaning separator, cleaning separator is mainly by jet pump and air bearing pump group at, wherein jet pump in the present embodiment
Specification Q=40m3/ h, lift 60m, upward water flow and gas needed for cleaning separator provides second level separation and recycling
Buoyancy, clean bulky grain (herein bulky grain refer to partial size be greater than 3.5cm) silt during sufficiently by the rubbish of package into
Row separation；Preferably, cleaning separator is located at rubbish separation chamber bottom and the entrance close to material transportation machine, can more have
Effect ground guarantees cleaning separating effect.Rubbish after separation is cleared up via the garbage grab bucket timing being located above rubbish separation chamber；And
Large granular materials after separation are sent by material transportation machine to rubbish seperator, carry out third level separation and recycling, wherein material
Transporter is inclined in rubbish separation chamber, and bottom, the exit that entrance is located at rubbish separation chamber extend to rubbish point
Outside from indoor top.Preferably, material transportation machine specification uses speed 0.2m/s, and stainless steel material conveyer belt above has anti-
Sliding slot.
All there is water in recovery pond and rubbish separation chamber, after internal water is full, be then discharged, if directly being arranged
Out, it is bound to cause the waste of water resource, therefore the present embodiment also carries out reflux recycling to the water in recovery pond, specifically,
The present embodiment is additionally provided with reflux line and reflux pump in recovery pond, and reflux line one end is located in recovery pond, the other end
It is passed through rubbish separation chamber, the water in recovery pond can be back to rubbish separation chamber by reflux pump.When the fine deposition in recovery pond
Afterwards, the fine sand for being deposited in bottom is extracted with external fine sand draw-out device, after the completion of extraction, starts reflux pump, reflux pump
Reflux power is provided, whose in recovery pond is back to rubbish separation chamber by reflux line, to realize that the repetition of water resource is sharp
With.
By being primarily present two kinds of recyclable materials in second level separation and the material recycled, first is that metallics, such as steel
Muscle, iron block etc., another kind are that (note: bulky grain refers to the surplus material particle after the second-order separation to bulky grain herein, by material
Transporter is transported up to the material particular diameter of rubbish seperator, according to the different specification of cleaning separator, generated
Grain is of different sizes) sand material, the two is provided with very high recyclings and is worth.According to this characteristic, rubbish seperator in the present embodiment
It is mainly made of belt feeder and magnetic separator, wherein the preferred transmission speed 1m/s of belt feeder specification.It will be big by rubbish seperator
The iron refuses such as reinforcing bar, iron block separate in granule materials, are then recycled, the bulky grain sand material separated, and carry out
It heaps and recycles.Further, the present embodiment is additionally provided with magnet in the terminal position of rubbish seperator, is separated by rubbish
The metallics that machine is separated is drawn by magnet, on the one hand improves the separating effect of rubbish seperator, on the other hand, magnet
It concentrates and draws metallics, be convenient for subsequent centralized recovery.
Embodiment 2
The present embodiment and embodiment 1 the difference lies in that vibrating screen single-deck vibrating screen aperture is 3cm, amplitude be 5mm~
8mm, matched, recovery pond is then used to receive the material that partial size is less than 3cm, and rubbish separation chamber is then used to receive partial size greater than 3cm
Material.
Embodiment 3
The present embodiment and embodiment 1 the difference lies in that vibrating screen single-deck vibrating screen aperture is 4cm, amplitude be 4mm~
9mm, matched, recovery pond is then used to receive the material that partial size is less than 4cm, and rubbish separation chamber is then used to receive partial size greater than 4cm
Material.
Embodiment 4
The present embodiment is with embodiment 1 the difference lies in that jet pump specification is Q=30m3/ h, lift 50m.
Embodiment 5
The present embodiment is with embodiment 1 the difference lies in that jet pump specification is Q=50m3/ h, lift 70m.
Above-mentioned is presently preferred embodiments of the present invention, it should be understood that those skilled in the art can root without creative work
Pass through logic analysis, reasoning or experiment etc. on the basis of existing technology according to design of the invention and obtain related art scheme,
Therefore these related art schemes all should be in the protection scope of present claims.
Claims (10)
1. a kind of Garbage separation equipment for river bottom mud disposition, it is characterised in that: including vibrating screen (2), be located at the vibration
The recovery pond (3) of dynamic sieve (2) first outlet lower part, the material guide rail (7) being arranged at the vibrating screen (2) second outlet, position
In the rubbish separation chamber (9) of material guide rail (7) lower part, setting interior and outside transported material in the rubbish separation chamber (9)
Material transportation machine (5), be arranged material transportation machine (5) exit rubbish seperator (10), and be arranged described
Cleaning separator (4) in rubbish separation chamber (9) and for cleaning separation of material, in the end of the rubbish seperator (10)
Position is additionally provided with the magnet (11) for drawing metal material.
2. the Garbage separation equipment for river bottom mud disposition according to claim 1, it is characterised in that: in the recovery pond
(3) it is additionally provided with reflux line (12) and reflux pump (13) in, described reflux line (12) one end is located at the recovery pond (3)
Interior, the other end is passed through the rubbish separation chamber (9), and the water in the recovery pond (3) can be flowed back by the reflux pump (13)
To the rubbish separation chamber (9).
3. the Garbage separation equipment for river bottom mud disposition according to claim 2, it is characterised in that: in the rubbish point
Garbage grab bucket (8) are additionally provided with from room (9) top.
4. the Garbage separation equipment for river bottom mud disposition according to claim 3, it is characterised in that: the recovery pond
(3) it is structure as a whole with the rubbish separation chamber (9), is separated by partition or partition wall therebetween；In the partition or partition wall
Upper end be set to lattice object grid (6).
5. the Garbage separation equipment for river bottom mud disposition according to claim 4, it is characterised in that: the rubbish separation
Machine (10) is mainly made of belt feeder and magnetic separator.
6. the Garbage separation equipment for river bottom mud disposition according to claim 5, it is characterised in that: the cleaning separation
Device (4) is arranged in rubbish separation chamber (9) bottom, mainly by jet pump and air bearing pump group at.
7. the Garbage separation equipment for river bottom mud disposition according to claim 6, it is characterised in that: the material transportation
Machine (5) is inclined in the rubbish separation chamber (9), and entrance is located at bottom, the exit of the rubbish separation chamber (9)
Extend to the outside on the interior top of the rubbish separation chamber (9).
8. the Garbage separation equipment for river bottom mud disposition according to claim 7, it is characterised in that: the material transportation
Machine (5) uses stainless steel conveyor belt, is provided with non-slip groove.
9. the Garbage separation equipment for river bottom mud disposition according to claim 8, it is characterised in that: the vibrating screen
(2) single-deck vibrating screen aperture is 3.5cm, and amplitude is 5mm~8mm.
10. the implementation method of -9 described in any item Garbage separation equipments for river bottom mud disposition according to claim 1,
It is characterized in that, comprising the following steps:
(1) river bottom mud is sent into vibrating screen；
(2) the lesser material of partial size enters recovery pond after shaker vibration is screened in river bottom mud；
(3) in river bottom mud the biggish material of partial size via material guide rail be sent into rubbish separation chamber；
(4) cleaning separator work, provides upward water flow and lift of gas, cleans to the material in rubbish separation chamber
Detached job；
(5) material after cleaning separation is divided into rubbish and surplus material, and handles as follows respectively:
For the rubbish separated, cleared up by garbage grab bucket；For surplus material, transported by material transportation machine to rubbish
Seperator, by surplus material metalliferous material and non-metallic material separate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910888921.9A CN110523533A (en) | 2019-09-19 | 2019-09-19 | A kind of Garbage separation equipment and its implementation for river bottom mud disposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910888921.9A CN110523533A (en) | 2019-09-19 | 2019-09-19 | A kind of Garbage separation equipment and its implementation for river bottom mud disposition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110523533A true CN110523533A (en) | 2019-12-03 |
Family
ID=68669352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910888921.9A Pending CN110523533A (en) | 2019-09-19 | 2019-09-19 | A kind of Garbage separation equipment and its implementation for river bottom mud disposition |
Country Status (1)
| Country | Link |
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| CN (1) | CN110523533A (en) |
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|---|---|---|---|---|
| JPH08257317A (en) * | 1995-03-22 | 1996-10-08 | Nippon Steel Corp | Treatment of dredging soil |
| US20030230009A1 (en) * | 2002-06-14 | 2003-12-18 | Chesner Warren Howard | Marine-based platform for dredged solids management |
| CN2698450Y (en) * | 2004-03-15 | 2005-05-11 | 谢明明 | Heavy garbage recovery and classification equipment |
| CN102814316A (en) * | 2012-08-29 | 2012-12-12 | 北京百氏源环保技术有限公司 | Method for pipe network sludge reduction treatment |
| CN205011652U (en) * | 2015-09-23 | 2016-02-03 | 保定市华锐方正机械制造有限公司 | Building waste sorting and recycle device |
| CN106242239A (en) * | 2016-08-01 | 2016-12-21 | 中电建水环境治理技术有限公司 | Polluted bed mud industrial treatment and regenerative system are gushed in lake, river |
| CN106316020A (en) * | 2016-08-16 | 2017-01-11 | 中电建水环境治理技术有限公司 | Garbage sorting regeneration system for treating rive and lake pollution bottom mud |
| CN109516670A (en) * | 2018-12-17 | 2019-03-26 | 宜兴华都琥珀环保机械制造有限公司 | River sludge processing system and processing method |
| CN210787749U (en) * | 2019-09-19 | 2020-06-19 | 兴霖环境(武汉)有限公司 | A rubbish splitter for river course bed mud is dealt with |
-
2019
- 2019-09-19 CN CN201910888921.9A patent/CN110523533A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08257317A (en) * | 1995-03-22 | 1996-10-08 | Nippon Steel Corp | Treatment of dredging soil |
| US20030230009A1 (en) * | 2002-06-14 | 2003-12-18 | Chesner Warren Howard | Marine-based platform for dredged solids management |
| CN2698450Y (en) * | 2004-03-15 | 2005-05-11 | 谢明明 | Heavy garbage recovery and classification equipment |
| CN102814316A (en) * | 2012-08-29 | 2012-12-12 | 北京百氏源环保技术有限公司 | Method for pipe network sludge reduction treatment |
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