Municipal rain, sewage pumping station automatic dredging system and dredging method
Technical field
The invention belongs to municipal rain, sewage pumping station construction technique field, more particularly to a kind of municipal rain, sewage pumping station are certainly
Dynamic desilting system and dredging method.
Background technology
At present, the rain in current some cities of China, sewage pumping station collecting-tank, generally existing siltation, hardened situation,
Pumping station operation and proper drainage have been hampered, the daily life of the people, trip has been had influence on;Current techniques and solution are done
Method:
1st, manpower is gone into the well desilting:Manpower is organized regularly to go into the well desilting, artificial lower well operations need the instrument being equipped with to include:Gas
Physical examination measurement equipment, spade, cleaning shoe, rope, pail etc.;This kind of desilting mode has a following defect, and personnel go into the well potential safety hazard
It is many, time-consuming, efficiency is low, and labor intensity is big, and regular not strong.
2nd, high pressure water flushing formula:Using the high-pressure hydraulic pump for being pre-installed in bottom of pond in pumping plant collecting-tank, pass through outlet pipeline
Upper densely covered nozzle is rinsed, and the alluvial of deposition is activated, and is then aspirated, transported with dredge pump car multi-point;It is often high
Water pump is by after silting, and desilting work can not just proceed, high pressure washing combination dredge pump car, and the continuity of practical operation is not
By force, human input and labor intensity are all very big, and equipment operation and maintenance cost are high.
3rd, stirring-type:Mixing plant is installed in advance in pumping plant collecting-tank, allows the mud largely deposited to suspend by stirring,
Muddy water is discharged to downstream pipe network or along River system by the feed pump for then starting pumping plant;Stir, lifted, discharge in this process not
There is the basic source for solving mud, the burden of downstream drainage pipe network is increased on the contrary, it is in line black in addition with the implementation of river length
Smelly water body has been not allowed to along River system.
For this provide it is a kind of manpower freed from heavy pumping plant collecting-tank desilting work, eliminated safe hidden trouble, reduce
The energy consumption and maintenance cost of pumping station operation, allow the desilting of pumping plant collecting-tank to realize regular practice and coherentization as early as possible, save social resources,
Municipal rain, sewage pumping station automatic dredging system and the dredging method contributed for environmental protection.
The content of the invention
Present invention technical problem present in solution known technology, which is provided, a kind of catchments manpower from heavy pumping plant
Free, eliminate safe hidden trouble in the desilting work of pond, reduce the energy consumption and maintenance cost of pumping station operation, allow the desilting of pumping plant collecting-tank to use up
Fast realize is made a practice of and coherentization, saves social resources, municipal rain, sewage pumping station automatic dredging system and the desilting of energy-conserving and environment-protective
Method.
The present invention is adopted the technical scheme that to solve technical problem present in known technology:
A kind of municipal rain, sewage pumping station automatic dredging system, it is characterised in that:It is described clear including pumping plant and desilting equipment
Silt equipment includes grid spotter, the quick release device that dams, suspension type alluvial lifting device, diving and drains pump;Above-mentioned pumping plant includes
The municipal rain of connection, several back with water inlet line of sewage, the back with water inlet line connect the water inlet of inlet gate well, the inlet gate
Inlet gate is installed, the inlet gate connects headstock gear, and the delivery port side of the inlet gate well sets grid pond in well,
Grid canal is provided between adjacent grid pond, the grid pond abuts collecting-tank, the collecting-tank adjoining lifting pump chamber, in lifting
Lifting pump group is installed in pump chamber;The lifting pump chamber adjoining discharge pressure pond or flowing water Valve well, each lifting pump group are equal
Connect the water inlet of discharge pressure pond or flowing water Valve well, the delivery port connection water outlet of the discharge pressure pond or flowing water Valve well
Pipeline;In the side of collecting-tank provided with cistern or the alluvial received well of damming, dam and be provided with and collection between cistern and collecting-tank
The spilled water hole of pond connection;The opposite side of the corresponding cistern collecting-tank that dams sets dam cistern or alluvial received well, described
Provided with the alluvial import connected with collecting-tank between alluvial received well and collecting-tank;The bottom of the alluvial received well, which is less than, dams
The bottom of cistern, forms an effective trapped volume space;It is provided with the bottom for the cistern that dams and leads slope;The storage that dams
Pond and alluvial received well between collecting-tank bottom it is corresponding alluvial entrance location provided with deposit collector groove, the alluvial collector groove
With water inlet direction into being vertically arranged, the alluvial collector groove laterally deposits received well direction provided with the gradient from the cistern that dams;Institute
The grid spotter stated is arranged in grid pond;The described quick release device that dams, which is arranged on, to dam in cistern;Described suspention
Formula alluvial lifting device movable type is arranged in alluvial received well;Diving is installed in described alluvial received well and drains pump, institute
State diving and drain pump position below alluvial reception bottom.
The present invention can also use following technical measures:
In collecting-tank training wall is provided with close to lifting pump chamber side.
It is provided with structure wall, the structure wall and is communicated with collecting-tank, discharge pressure pond or flowing water Valve well
Hole.
The inlet gate well, grid pond, collecting-tank, the centre position of lifting pump chamber are provided with separation along Inlet and outlet water direction
Wall, separates wall and inlet gate well, grid pond, collecting-tank, lifting pump chamber is divided into two independent units;The alluvial
Collector groove is by separating two alluvial collector grooves that wall is separated on same center line;Two independent collecting-tank sides
Alluvial received well is set respectively;The alluvial received well is correspondingly arranged with alluvial collector groove;The separation wall is provided with correspondence
Alluvial collects groove location provided with two spilled water holes, and two spilled water holes are arranged above and below, and two spilled water holes are on same center line,
One group of quick release device that dams is mounted on two spilled water holes,;
Deflector is set in the spilled water hole both sides on top, and the lower end of the deflector extends to the both sides of alluvial collector groove.
The quick release device that dams includes double-action hydraulic fast opening and closing, the hydraulic piston of the hydraulic pressure fast opening and closing
The body that dams of bar connection, the body that dams is slidably mounted in frame, and the both sides of the frame are provided with chute, the body that dams
Both sides are inserted into chute, are slided up and down in the presence of hydraulic pressure speed drives headstock gear along chute and are realized that speed is opened and Slow Close;The machine
Frame is fixedly mounted on the wall of collecting-tank.
Sluicing hole site has been poured in second coagulation soil structured body, the second coagulation soil structure on the wall of collecting-tank
Correspondence shelf position is embedded with the connector being fixedly connected with frame;Installation is prefabricated with the top collecting-tank wall of frame
Platform, the hydraulic pressure fast opening and closing is inverted in the upper surface of erecting bed, and the liquid presses piston pole of hydraulic pressure fast opening and closing is vertically downward
Extension, the body that dams is connected in the bottom of liquid presses piston pole.
The quick release device that dams includes double-action hydraulic fast opening and closing, the hydraulic piston of the hydraulic pressure fast opening and closing
The body that dams of bar connection, the body that dams is slidably mounted on gantry stand, and the both sides of the gantry stand are provided with chute, described
The dam both sides of body are inserted into chute, slide up and down that to realize that speed is opened gentle along chute in the presence of hydraulic pressure speed drives headstock gear
Close;The side of the gantry stand is fixedly connected with first flange;Tapping pipe is embedded with the spilled water hole of collecting-tank;It is described to let out
The delivery port of water pipe is provided with second flange;Second flange in the first flange and tapping pipe of the gantry stand passes through fastener
It is fixedly connected;The body that dams is installed in the outlet of first flange;The hydraulic pressure fast opening and closing is inverted in the top of gantry stand, liquid
The liquid presses piston pole of pressure fast opening and closing extends vertically downward, and the body that dams is connected in the bottom of liquid presses piston pole.
The suspension type alluvial lifting device is arranged on the top plate of alluvial received well, is connect in top plate both sides along alluvial
The length direction of receipts well, which is provided with line slideway, the line slideway, is equipped with walking dolly, and drive is provided with the walking dolly
Vertical top plate direction is provided with two on the travel driving unit that dynamic walking dolly is moved along line slideway, the walking dolly
Riser, the lower end of the riser extends to the bottom upper position of alluvial received well, and the upper end of the riser is upwardly extended,
Active wheels, the active wheels are installed between the upper end of two risers to rotate by driving member connection driving active wheels
Device for revolving and driving;Driven wheels are installed between the bottom of the riser, pacified between the active wheels and driven wheels
Equipped with belt, the outside of the belt uniformly mounted it is several scoop bucket, the bucket that scoops connects in lower limit position distance alluvial
Receive 3~5cm of bottom of well alluvial received well;Correspondence scoops bucket position and is placed with receiving hopper on the walking dolly.
The present invention also provides a kind of dredging method based on above-mentioned municipal rain, sewage pumping station automatic dredging system, including becomes silted up
The alluvial lifting operation of product collector groove dredging operation, grid pond dredging operation and water leg dredging operation and the collector groove that deposits
1), deposit collector groove dredging operation:Be first shut off the inlet gate of inlet gate well, at the same start water lift pump group and
Diving in alluvial received well drains pump, drains the ponding of collecting-tank;Secondly, while operation is drained into retention cistern
Water filling, making to dam produces liquid level difference between cistern and collecting-tank, dynamic condition is provided for later stage erosion and deposition;3rd, it is pre- when reaching
When phase sets liquid level difference, start the quick release device that dams, the quick release device quick return in 2~5 seconds that dams is acted, and speed of damming is opened
Device is located at the high-order water dammed in cistern and rushes at alluvial collector groove rapidly after opening, the alluvial of the interior deposition of alluvial collector groove exists
Along alluvial collector groove flow direction alluvial received well in the presence of water impact;3rd, now, diving drains pump and is again started up draining
Operation, the current erosion and deposition end of job;Remained if also had in silting and erosion, in the case where keeping dry pond state, pass through investigation mission outside the city or town water source
Mode water filling into the cistern that dams, when reaching expected setting difference in the cistern that dams, carries out secondary erosion and deposition;
2), grid pond dredging operation:Under the state of dry pond, the certain of inlet gate opening of inlet gate well is opened
Degree, using path flow velocity principle, the alluvial to grid bottom of pond portion carries out erosion and deposition;
3) lower section of pump group, is lifted in collecting-tank, pump chamber bottom is provided with the water conservancy diversion slope of 1.5% gradient, utilizes elevator pump
The water hammering that water backflow during shutdown in lifting pipe is produced makes alluvial flow direction alluvial collector groove to pump chamber bottom erosion and deposition.
4) the alluvial lifting operation of alluvial collector groove:Alluvial received well bottom will be deposited on by starting suspension type alluvial lifting device
The alluvial in portion is lifted, and is promoted to receiving hopper, after receiving hopper is fully loaded, receiving hopper is removed, and is changed a new receiving hopper and is
Can continuously it receive.
The present invention has the advantages and positive effects of:Because the present invention uses above-mentioned technical proposal, it is possible to achieve multi-party
Position, multi-angle, multi-level dredging operation, and manpower freed from heavy pumping plant collecting-tank desilting work, is eliminated safely
Hidden danger, reduces the energy consumption and maintenance cost of pumping station operation, allows the desilting of pumping plant collecting-tank to realize regular practice and coherentization, desilting as early as possible
Effect is good, saves social resources, is the advantages of environmental protection is contributed.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is middle A-A sectional views;
Fig. 3 is B-B sectional views in Fig. 1;
Fig. 4 is C-C sectional views in Fig. 1;
Fig. 5 is the quick release device structural representation that dams;
Fig. 6 is quick release device mounting structure schematic diagram of damming;
Fig. 7 is another quick release device structural representation that dams;
Fig. 8 is the mounting structure schematic diagram of quick release device of damming described in Fig. 7;
Fig. 9 is suspension type alluvial lifting device structural representation;
Figure 10 is the pump station structure schematic diagram of embodiment 2.
In figure:100th, pumping plant;110th, back with water inlet line;120th, inlet gate well;121st, inlet gate;122nd, headstock gear;
130th, grid pond;131st, grid canal;140th, collecting-tank;141st, deposit collector groove;142nd, training wall;143rd, structure wall;144、
Wall;145th, second coagulation soil structured body;146th, connector;147th, erecting bed;145th, second coagulation soil structured body;146th, connect
Part;147th, erecting bed;150th, pump chamber is lifted;151st, pump group is lifted;160th, discharge pressure pond;161st, structure wall;170th, water outlet
Pipeline;180th, dam cistern;181st, spilled water hole;190th, deposit received well;191st, top plate;210th, grid spotter;220、
Dam quick release device;221st, double-action hydraulic fast opening and closing;222nd, dam body;223rd, frame;224th, chute;225th, gantry plane
Frame;226th, first flange;227th, tapping pipe;228th, second flange;230th, suspension type alluvial lifting device;231st, line slideway;
232nd, walking dolly;233rd, travel driving unit;234th, riser;235th, active wheels;236th, driving member;237th, revolution driving
Device;238th, driven wheels;239th, belt;2390th, bucket is scooped;2391st, receiving hopper;240th, diving drains pump;300th, dividing wall
Body;310th, spilled water hole;
Embodiment
In order to further understand the content, features and effects of the present invention, hereby enumerating following examples, and coordinate accompanying drawing
Describe in detail as follows:
Embodiment 1, refers to Fig. 1 to Fig. 4, a kind of municipal rain, sewage pumping station automatic dredging system, including the He of pumping plant 100
Desilting equipment, the desilting equipment include grid spotter 210, the quick release device 220 that dams, suspension type alluvial lifting device 230,
Diving drains pump 240;Above-mentioned pumping plant 100 includes the municipal rain of connection, several back with water inlet line 110 of sewage, and the back with water inlet line connects
Tap into and inlet gate 121 is installed in the water inlet of sluice gate well 120, the inlet gate well, the inlet gate connection is opened
Machine 122 is closed, headstock gear controls the opening and closing of inlet gate, and its operation principle belongs to known technology;The inlet gate well
120 delivery port side sets and grid canal 131 is provided between grid pond 130, adjacent grid pond, and the grid pond abuts collecting-tank
140, the collecting-tank adjoining lifting pump chamber 150 has lifting pump group 151 in elevator pump indoor location;The lifting pump chamber adjoining
It is discharge pressure pond 160 in discharge pressure pond or flowing water Valve well, the present embodiment, each lifting pump group is all connected with discharge pressure
The delivery port connection water outlet pipeline 170 of the water inlet in pond, the discharge pressure pond or flowing water Valve well;Set in the side of collecting-tank
There is the cistern 180 that dams, dam between cistern and collecting-tank provided with the spilled water hole 181 connected with collecting-tank;The corresponding storage that dams
The opposite side of pond collecting-tank sets alluvial received well 190, is provided with and connects with collecting-tank between the alluvial received well and collecting-tank
Logical alluvial import, the bottom of the alluvial received well is less than the bottom for the cistern that dams, and forms an effective trapped volume
Space;In the bottom for the cistern that dams provided with slope 181 is led, the bottom precipitation alluvial in the cistern that dams is prevented;The storage that dams
Pond and alluvial received well between collecting-tank bottom it is corresponding alluvial entrance location provided with alluvial collector groove 141, it is described alluvial remittance
Collection groove is with water inlet direction into being vertically arranged, and the alluvial collector groove laterally deposits received well direction provided with slope from the cistern that dams
Degree;Described grid spotter 210 is arranged in grid pond 130;The described quick release device 220 that dams is arranged on the cistern that dams
In 180;Described suspension type alluvial lifting device 230 is portable to be arranged in alluvial received well 190;Described alluvial received well
Diving is inside installed and drains pump 240, the diving drains pump and is located at position below alluvial reception bottom.
In order to realize the guide functions in collecting-tank, training wall 142 is provided with close to lifting pump chamber side in collecting-tank 140.
In order to improve the intensity of pumping plant, in collecting-tank, discharge pressure pond or flowing water Valve well provided with structure wall 143,
161, hole is communicated with the structure wall.
Refer to Fig. 5 and Fig. 6, the above-mentioned quick release device 220 that dams includes double-action hydraulic fast opening and closing 221, position.
The body 222 that dams of the liquid presses piston pole connection of the hydraulic pressure fast opening and closing, the stroke of hydraulic pressure fast opening and closing is more than the body that dams
Effective travel 30%;The body that dams is slidably mounted in frame 223, and the both sides of the frame are provided with chute 224, described to dam
The both sides of body are inserted into chute, are slided up and down in the presence of hydraulic pressure speed drives headstock gear along chute and are realized that speed is opened and Slow Close;Institute
Frame 223 is stated to be fixedly mounted on the wall 144 of collecting-tank.Power is done in municipal rain, sewage pumping station using hydraulic station first
Output center, is realized to the single control and multimachine joint control of quick open type cut-off equipment, and hand, to automatically control switching freely, running status real
Shi Shangchuan;Using the backhaul of oil cylinder, the body that dams is opened within 2~5 seconds;The quick release device that dams have good economy performance, dependable performance, into
The features such as this low cost, efficiency and service life further improve, reduce environmental pollution.
In order to not destroy collecting-tank wall, sluicing hole site has poured second coagulation soil structured body on the wall of collecting-tank
145, correspondence shelf position is embedded with the connector 146 being fixedly connected with frame in the second coagulation soil structure;In frame
Erecting bed 147 is prefabricated with the collecting-tank wall of top, the hydraulic pressure fast opening and closing is inverted in the upper surface of erecting bed, and hydraulic pressure is fast
The liquid presses piston pole of fast headstock gear 221 extends vertically downward, and the body 222 that dams is connected in the bottom of liquid presses piston pole.
On the premise of overall collecting-tank strength of wall body is not influenceed, the installation effectiveness for the quick release device that dams, speed of damming are improved
Opening apparatus can also use following structure, refer to Fig. 7 and Fig. 8, the quick release device that dams quickly is opened including double-action hydraulic
Machine 221 is closed, the body 222 that dams of the liquid presses piston pole connection of the hydraulic pressure fast opening and closing, the body that dams is slidably mounted on dragon
In door frame 225, the both sides of the gantry stand 225 are provided with chute 224, and the both sides for damming body 222 are inserted into chute,
Slided up and down in the presence of hydraulic pressure speed drives headstock gear along chute and realize that speed is opened and Slow Close;The side of the gantry stand 225 is consolidated
Surely it is connected with first flange 226;Tapping pipe 227 is embedded with the spilled water hole of collecting-tank;The delivery port of the tapping pipe is provided with
Second flange 228;The first flange of the gantry stand is fixedly connected with the second flange on tapping pipe by fastener;
The outlet of one flange is installed by the body 222 that dams;The hydraulic pressure fast opening and closing is inverted in the top of gantry stand 225, and hydraulic pressure is quick
The liquid presses piston pole of headstock gear extends vertically downward, and the body 222 that dams is connected in the bottom of liquid presses piston pole.
Referring to Fig. 9, the suspension type alluvial lifting device 230 is arranged on the top plate 191 of alluvial received well, upper
Length direction of the laminate both sides along alluvial received well, which is provided with line slideway 231, the line slideway, is equipped with walking dolly 232,
The travel driving unit 233 that driving walking dolly is moved along line slideway, the walking dolly are installed on the walking dolly
Upper vertical top plate direction is provided with two risers 234, and the lower end of the riser extends to the top position in bottom of alluvial received well
Put, the upper end of the riser is upwardly extended, active wheels 235, the driving wheel are installed between the upper end of two risers
Group connects the device for revolving and driving 237 that driving active wheels are rotated by driving member 236;The bottom of the riser 234 it
Between install driven wheels 238, belt 239 is installed, the outside of the belt is uniform between the active wheels and driven wheels
Mounted it is several scoop bucket 2390, it is described scoop bucket the bottom 3 of lower limit position distance alluvial received well alluvial received well~
5cm;Correspondence scoops bucket position and is placed with receiving hopper 2391 on the walking dolly;Driven under the driving of travel driving unit whole
The length direction of individual device along alluvial received well is moved, the scooping bucket and will be deposited on positioned at lower end extreme position in moving process
Alluvial receive bottom alluvial dipped, after dipping on the effect belt of device for revolving and driving scoop bucket gradually with
Alluvial motion upwards, when the alluvial for moving to upper extreme position and scooping bucket is gradually trickled down in the receiving hopper on walking dolly, when
After receiving hopper is fully loaded, receiving hopper is removed, changing a new receiving hopper can continuously graft clay.
Embodiment 2, in order to improve the reasonability of pump station structure, it is ensured that still be able to run well during maintenance, in the water inlet
Gate shaft 120, grid pond 130, collecting-tank 140, the centre position of lifting pump chamber 150 are provided with separation wall along Inlet and outlet water direction
300, separate wall and inlet gate well, grid pond, collecting-tank, lifting pump chamber are divided into two independent units;The alluvial
Collector groove 141 is by separating two alluvial collector grooves that wall is separated on same center line;Two independent collecting-tanks
Side sets alluvial received well 190 respectively;The alluvial received well is correspondingly arranged with alluvial collector groove;Set on the separation wall
There is corresponding alluvial to collect groove location provided with two spilled water holes 310, two spilled water holes are in arrangement, and two spilled water holes are same up and down
On center line, one group of quick release device 220 that dams is mounted on two spilled water holes;The unit of two such independence can replace
Use, improve operating efficiency, extend the service life of equipment of pumping station;In order to ensure that top spilled water hole converges to alluvial to greatest extent
Washing away for collection groove, deflector 320 is set in the spilled water hole both sides on top, and the lower end of the deflector extends to alluvial collector groove
Both sides.
The present invention also provides a kind of dredging method based on above-mentioned municipal rain, sewage pumping station automatic dredging system, including becomes silted up
The alluvial lifting operation of product collector groove dredging operation, grid pond dredging operation and water leg dredging operation and the collector groove that deposits
1), deposit collector groove dredging operation:Be first shut off the inlet gate of inlet gate well, at the same start water lift pump group and
Diving in alluvial received well drains pump, drains the ponding of collecting-tank;Secondly, while operation is drained into retention cistern
Water filling, making to dam produces liquid level difference between cistern and collecting-tank, dynamic condition is provided for later stage erosion and deposition;3rd, it is pre- when reaching
When phase sets liquid level difference, start the quick release device that dams, the quick release device quick return in 2~5 seconds that dams is acted, and speed of damming is opened
Device is located at the high-order water dammed in cistern and rushes at alluvial collector groove rapidly after opening, the alluvial of the interior deposition of alluvial collector groove exists
Along alluvial collector groove flow direction alluvial received well in the presence of water impact;3rd, now, diving drains pump and is again started up draining
Operation, the current erosion and deposition end of job;Remained if also had in silting and erosion, in the case where keeping dry pond state, pass through investigation mission outside the city or town water source
Mode water filling into the cistern that dams, when reaching expected setting difference in the cistern that dams, carries out secondary erosion and deposition;Dam retaining
Pond retaining can be fully utilized the pool inner water that catchments and be extracted by pump, and collecting-tank current level can also be used as main water
During the expected setting value of water level deficiency in source, retention cistern, investigation mission outside the city or town water source can be borrowed give and supplement, until reaching that expection is set
Definite value;After first time desilting is completed, when the cistern that dams needs refilling, the intake gate of inlet gate well can be first opened
Door, when the water level of collecting-tank rises to certain liquid level, opens the body that dams, is the liquid dammed in cistern using the principle of linker
Position is consistent with the liquid level in collecting-tank, now closes the body that dams, until spilled water hole is realized and closed by the body that dams, retains retaining
During the expected setting value of water level deficiency in pond, investigation mission outside the city or town water source can be borrowed give and supplement, until reaching expected setting value;In addition not
The rainwater that the cistern that dams during progress dredging operation can also be collected is as water source.
2), grid pond dredging operation:Under the state of dry pond, the certain of inlet gate opening of inlet gate well is opened
Degree, using path flow velocity principle, the alluvial to grid bottom of pond portion carries out erosion and deposition;
3) lower section of pump group, is lifted in collecting-tank, pump chamber bottom is provided with the water conservancy diversion slope of 1.5% gradient, utilizes elevator pump
The water hammering that water backflow during shutdown in lifting pipe is produced makes alluvial flow direction alluvial collector groove to pump chamber bottom erosion and deposition.
4) the alluvial lifting operation of alluvial collector groove:Alluvial received well bottom will be deposited on by starting suspension type alluvial lifting device
The alluvial in portion is lifted, and is promoted to receiving hopper, after receiving hopper is fully loaded, receiving hopper is removed, and is changed a new receiving hopper and is
Can continuously it receive.
Using above-mentioned technical proposal, it is possible to achieve multi-faceted, multi-angle, multi-level dredging operation, and by manpower from numerous
Free, eliminate safe hidden trouble in the pumping plant collecting-tank desilting work of weight, reduce the energy consumption and maintenance cost of pumping station operation, allow pumping plant
Regular practice and coherentization are realized in collecting-tank desilting as early as possible, and dredging effect is good, saving social resources, and it is excellent to be that environmental protection is contributed etc.
Point.
It is described above to be only the preferred embodiments of the present invention, any formal limitation not is made to the present invention,
Every technical spirit according to the present invention is belonged to any simple modification made for any of the above embodiments, equivalent variations and modification
In the range of technical solution of the present invention.