CN109865733A - A kind of system and method for shield dregs in-situ processing and recycling - Google Patents
A kind of system and method for shield dregs in-situ processing and recycling Download PDFInfo
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- CN109865733A CN109865733A CN201910172265.2A CN201910172265A CN109865733A CN 109865733 A CN109865733 A CN 109865733A CN 201910172265 A CN201910172265 A CN 201910172265A CN 109865733 A CN109865733 A CN 109865733A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses a kind of shield dregs in-situ processing and the system and method for recycling, the system includes sand washer, mud ditch, mud adjustment tank and filter press, the slurry liquid delivery outlet of sand washer is connected to the slurry liquid input port of mud ditch, the slurry liquid delivery outlet of mud ditch is connected to the slurry liquid input port of mud adjustment tank, and the excess sludge delivery outlet of mud adjustment tank is connected to the excess sludge input port of filter press；Sand washer, mud adjustment tank and filter press are set to the top of mud ditch, and mud ditch is set to below the earth's surface of construction site.Method includes carrying out washing and screening to shield dregs；Slurry liquid is adjusted；Filters pressing is carried out to excess sludge.Present system, have many advantages, such as that simple structure, stable, long service life, occupied area be small, strong operability, there are higher application value and preferable application prospect, its application method can realize that shield dregs stabilisation, minimizing, innoxious and recycling, application prospect are good to the maximum extent.
Description
Technical field
The invention belongs to solid waste recycling fields, and in particular to a kind of shield dregs in-situ processing and recycling
System and method.
Background technique
As national economy rapidly develops, Modern City Traffic pressure is increasing, promotes city underground development swift and violent.And
Present subway work is based on shield-tunneling construction, in shield driven Metro tunnel construction, due to a large amount of water, bentonite, foam etc.
The addition of additive, so that water content is larger in the dregs excavated, dregs outward transport just becomes city manager, unit in charge of construction the most
The problem of headache.If the direct entrucking of the very big dregs of water content transported outward, dregs is excessive to city along road during transportation
Image brings very bad influence, this results in being processed into for a technical problem of shield dregs, therefore studies a kind of shield
The in-situ processing of structure dregs and recycling system and method are necessary.
Treatment in situ in the field of shield dregs is a kind of novel waste resource recovery processing method, it can be achieved that seamless interfacing, real
Show dregs processing " zero distance " transport, avoids secondary pollution, advantage includes small investment, low energy consumption, operation cost is lower, most
Important is realize discarded dregs minimizing, innoxious, recycling processing target.However, China's major part subway work
Place is in city, and small construction area is the main bottleneck for limiting the on-site disposal techniques scale of shield dregs.Conventional molding is set
Standby usual occupied area is larger, operation processing step is relatively complicated, leads to not carry out rational deployment in Urban Metro Construction mouth
The problems such as.
Furthermore river sand is a kind of common construction material that natural rock is hit and friction is formed.China is mainly used for coagulation
The preparation of soil.All the time, either in rural area or urban area, river sand is all essential to building, but in recent years
China's most area all forbids adopting sand activity, and which results in market sandstone rise in price, increases building cost.China is Central-South
Red soil, clay SiO are principally fallen into southern area soil property2/Al2O3Be 2.0~2.4, clay mineral based on kaolinite,
The 80%~85% of clay total amount can be generally accounted for, shield dregs resourcebility degree is high, therefore, research shield dregs recycling tool
It is of great significance.
Summary of the invention
The technical problem to be solved by the present invention is to overcome deficiency in the prior art, provide that a kind of occupied area is small, can grasp
The system of the strong shield dregs in-situ processing of the property made and recycling, also provide a kind of utilization rate of raw materials is high, price is low, operation at
This is low, equipment loss is small, environmentally protective, can realize shield dregs stabilisation, minimizing, innoxious and resource to the maximum extent
The in-situ processing of change and method of resource.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
The system of a kind of shield dregs in-situ processing and recycling, the system comprises mud ditch, mud to adjust tank, filters pressing
Machine and sand washer for shield dregs to be eluted and sieved；The slurry liquid delivery outlet of the sand washer and mud ditch
The slurry liquid delivery outlet of the connection of slurry liquid input port, the mud ditch is connected to the slurry liquid input port of mud adjustment tank, described
The excess sludge delivery outlet of mud adjustment tank is connected to the excess sludge input port of filter press；The sand washer, mud adjust tank
The top of mud ditch is set to filter press, the mud ditch is set to below the earth's surface of construction site.
The system of the above-mentioned in-situ processing of shield dregs and recycling, further improved, the slurry liquid of the mud ditch
Delivery outlet is connected to the slurry liquid input port of mud adjustment tank by the first slurry pipeline, is set on first slurry pipeline
There is the mud push pump for being transported to slurry liquid in mud adjustment tank；The excess sludge delivery outlet of mud adjustment tank with
The excess sludge input port of filter press is connected to by the second slurry pipeline, and second slurry pipeline is equipped with for that will remain
Remaining sludge is delivered to the sludge pressure pump in filter press.
The system of the above-mentioned in-situ processing of shield dregs and recycling, further improved, the slurry liquid of the sand washer
Delivery outlet is connected to the slurry liquid input port of mud ditch by slurry liquid discharge guiding pipe.
The system of the above-mentioned in-situ processing of shield dregs and recycling, further improved, the system also includes be used for
It transports in sand washer and is dehydrated the transport vehicle of mud in finished aggregate or filter press.
The system of the above-mentioned in-situ processing of shield dregs and recycling, further improved, the system also includes shields
Mud dispatch tube, the shield mud dispatch tube are connected to shield machine mud discharging mouth；The shield mud dispatch tube is equipped with for by shield
Dregs be delivered in sand washer into dredge pump.
The system of the above-mentioned in-situ processing of shield dregs and recycling, further improved, the sand washer is screwed washing
Sand machine or bucket sand washer；The mud adjustment tank is flocculation basin；The filter press is belt filter press.
As a general technical idea, the present invention also provides a kind of shield dregs in-situ processing and the sides of recycling
Method, the method carry out in-situ processing to shield dregs using above-mentioned system.
Above-mentioned method, it is further improved, comprising the following steps:
S1, shield dregs is transported to progress washing and screening in sand washer, obtains finished aggregate and slurry liquid；
S2, will be transported in slurry liquid obtained in step S1 mud adjustment tank in be adjusted, obtain supernatant liquor and
Excess sludge；
S3, excess sludge obtained in step S2 is delivered to filter press progress filters pressing, completes the processing to shield dregs.
Above-mentioned method, further improved, in the step S1, the revolving speed for controlling sand washer is 1r/min~2r/
min；The sand factor of the shield dregs is 30%~70%；The finished aggregate includes rubble and fine sand；The grain of the rubble
Diameter >=5mm；The partial size of the fine sand is 0.15mm~10mm；The finished aggregate is transported to outside the venue for following resourceization benefit
With；
It is described to be adjusted to add alum solution, polyaluminum chloride aqueous solution and demulsifier aqueous solution in the step S2
It is added in mud adjustment tank, stirring makes mud demulsification, flocculation, precipitates, and filtering obtains supernatant liquor and excess sludge；It is stated clearly
The volume ratio of alum aqueous solution, polyaluminum chloride aqueous solution and demulsifier aqueous solution is 1: 2: 1；The quality of the alum solution is dense
Degree is 5%~15%；The mass concentration of the polyaluminum chloride aqueous solution is 5%~15%；The matter of the demulsifier aqueous solution
Measuring concentration is 5%~15%；The supernatant liquor is back in step S1 for carrying out washing to shield dregs；
In the step S3, the moisture content of the excess sludge is 80%~99%；The dehydration mud obtained after the filters pressing
It is transported to and is utilized outside the venue for following resourceization；The filtrate a part obtained after the filters pressing flows back into step S2 for mud
Slurries are adjusted, and another part is back in step S1 for carrying out washing to shield dregs.
Above-mentioned method, further improved, in the step S2, the demulsification agent solution is polyacrylamide solution.
Compared with the prior art, the advantages of the present invention are as follows:
(1) the present invention provides a kind of shield dregs in-situ processing and the systems of recycling, including mud ditch, mud to adjust
Tank, filter press and the sand washer for shield dregs to be eluted and sieved, wherein the slurry liquid delivery outlet of sand washer with
The slurry liquid input port of mud ditch is connected to, and the slurry liquid delivery outlet of mud ditch is connected to the slurry liquid input port of mud adjustment tank,
The excess sludge delivery outlet of mud adjustment tank is connected to the excess sludge input port of filter press；Sand washer, mud adjustment tank and pressure
Filter is set to the top of mud ditch, and mud ditch is set to below the earth's surface of construction site.Shield dregs in-situ processing of the present invention and money
The system in source, the position by optimizing each device are complemented each other so that each device is closely coupled, and operation expense is low,
Have many advantages, such as that simple structure, stable, long service life, occupied area be small, strong operability, can make up for it shield scene
The shortcomings that construction area is narrow, shield dregs can not be stored largely, there is higher application value and preferable application prospect.
(2) the present invention provides a kind of shield dregs in-situ processing and the methods of recycling, by carrying out to shield dregs
Washing and screening reduce shield slag soil's water content, volume and transportation cost, the finished-product material finally generated (finished aggregate) tool
Have the advantages that uniform particle sizes, impurity are less, can sell, wherein treated that dregs is separated into is broken through the system resourceization
Stone and fine sand two parts, rubble (coarse aggregate) can be used for construction or bed course construction, and fine sand can be used for cement preparation；Into
One step, be demulsified, flocculated to obtained slurry liquid after washing and screening, by precipitating and filter, obtain supernatant liquor and
Excess sludge, wherein supernatant liquor is used to carry out washing to shield dregs, reduces production cost；Further, to remaining dirty
Mud carries out filters pressing, obtains dehydration mud and filtrate, wherein dehydration mud can be used for preparing building block, creates new economic value, sufficiently
Land resource, energy conservation and environmental protection is utilized, and filtrate can be used for being adjusted mud and carry out washing to shield dregs, reduce
While use cost, and it can effectively solve the sewage handling problem in pressure-filtering process.Shield dregs in-situ processing of the present invention and
The method of recycling can make full use of the construction material in shield dregs, while also can be realized water resource during processing
Recycle, have many advantages, such as that utilization rate of raw materials is high, price is low, operating cost is low, equipment loss is small, environmentally protective, energy
It is enough to realize shield dregs stabilisation, minimizing, innoxious and recycling to the maximum extent, there is preferable application prospect.
Detailed description of the invention
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described.
Fig. 1 is the structural schematic diagram of the in-situ processing of shield dregs and recycling system in the embodiment of the present invention 1.
Marginal data:
1, sand washer；2, mud ditch；3, mud adjusts tank；4, filter press；5, the first slurry pipeline；6, the second mud is defeated
Send pipe；7, mud push pump；8, sludge pressure pump；9, slurry liquid discharge guiding pipe；10, transport vehicle；11, shield mud dispatch tube；12, into
Dredge pump；13, shield machine mud discharging mouth.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
Material employed in following embodiment and instrument are unless otherwise noted commercially available.
Embodiment 1:
As shown in Figure 1, the system of a kind of shield dregs in-situ processing and recycling, including mud ditch 2, mud adjustment tank 3,
Filter press 4 and sand washer 1 for shield dregs to be eluted and sieved, wherein the slurry liquid delivery outlet of sand washer 1 with
The slurry liquid input port of mud ditch 2 is connected to, and the slurry liquid input port of slurry liquid delivery outlet and mud the adjustment tank 3 of mud ditch 2 connects
Logical, the excess sludge delivery outlet of mud adjustment tank 3 is connected to the excess sludge input port of filter press 4；Sand washer 1, mud adjustment
Tank 3 and filter press 4 are set to the top of mud ditch 2, and mud ditch 2 is set to below the earth's surface of construction site.Shield dregs of the present invention is existing
The system of field Treatment and recovery keeps each device closely coupled, complements each other, operation is tieed up by optimizing the position of each device
It protects at low cost, has many advantages, such as that simple structure, stable, long service life, occupied area be small, strong operability, it can be more
The shortcomings that shield site operation area is narrow, shield dregs can not be stored largely is mended, there is higher application value and is preferably answered
Use prospect.
In the present embodiment, the slurry liquid input port of slurry liquid delivery outlet and mud the adjustment tank 3 of mud ditch 2 passes through the first mud
It starches delivery pipe 5 to be connected to, the mud that the first slurry pipeline 5 is equipped with for slurry liquid to be transported in mud adjustment tank 3 pushes
Pump 7；The excess sludge input port of excess sludge delivery outlet and filter press 4 that mud adjusts tank 3 is connected by the second slurry pipeline 6
Logical, the second slurry pipeline 6 is equipped with the sludge pressure pump 8 for being delivered to excess sludge in filter press 4.
In the present embodiment, the slurry liquid delivery outlet of sand washer 1 and the slurry liquid input port of mud ditch 2 pass through slurry liquid guide
Pipe 9 is connected to, wherein the slurry liquid that sand washer 1 generates is transported in mud ditch 2 by slurry liquid discharge guiding pipe 9 and is temporarily stored.
In the present embodiment, above system further includes being dehydrated mud in finished aggregate or filter press 4 for transporting in sand washer 1
Finished aggregate and dehydration mud are transported to over-the-counter progress resource utilization by transport vehicle 10, wherein through the system by transport vehicle 10
Dregs after recycling treatment is separated into rubble and fine sand two parts, and rubble (coarse aggregate) can be used for construction or road surface pad
Layer construction, fine sand can be used for cement preparation.
In the present embodiment, above system further includes shield mud dispatch tube 11, shield mud dispatch tube 11 and shield machine mud discharging mouth
13 connections；Shield mud dispatch tube 11 be equipped with for by shield dregs be delivered in sand washer 1 into dredge pump 12.
In the present embodiment, sand washer 1, mud ditch 2, mud adjustment tank 3, filter press 4, shield machine mud discharging mouth 13 pass through pipeline
(such as the first slurry pipeline 5, the second slurry pipeline 6, slurry liquid discharge guiding pipe 9, shield mud dispatch tube 11) connection, can not only
The problems such as enough avoiding material leakage in transmission process, additionally it is possible to which the occupied area for further decreasing the system is guaranteeing that system is steady
Surely the operability and service life of further lifting system while operation.
In the present embodiment, sand washer 1 is bucket sand washer, and specification (model) is XS2600, outer dimension (long × wide ×
It is high) are as follows: 3520mm × 2390mm × 2690mm, bucket diameter are 2600mm；It is flocculation basin that mud, which adjusts tank 3, as cylindrical
Mud tank is stored up, it is highly 3000mm that the diameter of outer dimension, which is 2000mm,；Filter press 4 is belt filter press, model
FSDNY500, outer dimension (length × width × height) are as follows: 3750mm × 1050mm × 1950mm, strainer width are 600mm.
In the present embodiment, dregs recycling system is constituted into dredge pump 12, sand washer 1 and mud ditch 2；Mud push pump 7, mud
Slurry adjustment tank 3, sludge pressure pump 8 and filter press 4 constitute mud disposal system；For transporting finished aggregate or pressure in sand washer 1
The transport vehicle 10 that mud is dehydrated in filter 4 constitutes distribution system.
In the present embodiment, the first slurry pipeline 5, the second slurry pipeline 6, slurry liquid discharge guiding pipe 9, shield mud dispatch tube
11 be the rubber sludge pipe for meeting HG2184-91 standard.In the present embodiment, preferred rubber sludge pipe volume diameter is 203mm.
In the present embodiment, mud push pumps 7, sludge pressure pump 8, is single-stage single-sucking verticle centrifugel, type into dredge pump 12
Number NL100-16.
A kind of method of shield dregs in-situ processing and recycling, it is existing using the shield dregs in the embodiments of the present invention
The system of field Treatment and recovery carries out in-situ processing to shield dregs, comprising the following steps:
(1) washed-out sand: logical using the shield dregs (sand factor is 30%~70%) for excavating shield machine into dredge pump 12
It crosses shield mud dispatch tube 11 to be sent into the washing trough of sand washer 1, control revolving speed is 1r/min, is rolled under the drive of impeller, and mutually
Phase grinding removes the impurity on sandstone surface in covering dregs, destroys the steam layer of cladding sand grains, in favor of dehydration；Add water simultaneously,
Powerful water flow is formed, in time takes away the small foreign matter of impurity and specific gravity, completes cleaning action, processing capacity is in 30t/h.Clean
Rubble and fine sand are taken away by blade, and last rubble and fine sand pour into blow tank from the impeller of rotation, finished aggregate are obtained, by transporting
Vehicle 10 transports outside the venue, handles for following resourceization, such as construction, prepare cement, wherein the grain of finished aggregate medium stone
Diameter >=5mm, the particle size range of sand is between 0.15-5mm.The slurry liquid of slurry liquid from the sand washer 1 washed after washing and screening is defeated
Outlet drains into mud ditch 2 through slurry liquid discharge guiding pipe 9, carries out subsequent processing.
(2) mud adjusts: being sent into the slurry liquid in mud ditch 2 by the first slurry pipeline 5 using mud push pump 7
Mud adjusts in tank 3, is that 1: 1000 (dosage of additive is true according to field test according to the volume ratio of additive and slurry liquid
It is fixed), additive is added into mud adjustment tank 3, wherein additive includes that alum solution, quality that mass concentration is 5% are dense
Spend the polyaluminum chloride aqueous solution for 12%, the demulsifier aqueous solution (polyacrylamide solution) that mass concentration is 7%, three
Volume ratio be 1: 2: 1, then quickly stirring makes mud demulsification, flocculation, rapid precipitation, filtering, obtains supernatant liquor and and surplus
Remaining sludge, wherein gained supernatant liquor is back in step (1) for carrying out washing to shield dregs.In the step, mainly
Slurry liquid is adjusted, the processing time is total up to 3h.
(3) filters pressing: the excess sludge (moisture content is 80%~99%) for being obtained step (2) using sludge pressure pump 8 is logical
It crosses the second slurry pipeline 6 to send to filter press 4 (belt filter press) progress filters pressing, be made after mud cake (dehydration mud) by transport vehicle 10
It transports outside the venue, is recycled for following resourceization, such as building block.Filtrate a part that filters pressing generates is back to mud adjustment tank 3
Middle carry out circular treatment, a part is back in sand washer 1 washes for carrying out choosing to shield dregs.
The system of the in-situ processing of shield dregs and recycling of the invention, occupied area is small, strong operability, at low cost
Honest and clean, the moisture content of the cake finally generated is low, small in size, equipment operating cost is low, loss is small, utilization rate of raw materials is high.Test knot
Structure shows that system day handles dregs 240t, and generating coarse aggregate (rubble) is 50t, partial size >=5mm, fine sand 100t, partial size model
It is trapped among between 0.15-5mm, dehydration mud (mud cake) moisture content is 60%.
Embodiment 2:
A kind of method of shield dregs in-situ processing and recycling, utilizes the shield dregs in the embodiments of the present invention 1
The system of in-situ processing and recycling handles shield dregs, comprising the following steps:
(1) washed-out sand: logical using the shield dregs (sand factor is 30%~70%) for excavating shield machine into dredge pump 12
Shield mud dispatch tube 11 to be crossed to be sent into the washing trough of sand washer 1, control revolving speed is 1.5r/min, it rolls under the drive of impeller, and
Mutual phase grinding removes the impurity on sandstone surface in covering dregs, destroys the steam layer of cladding sand grains, in favor of dehydration；Add simultaneously
Water forms powerful water flow, in time takes away the small foreign matter of impurity and specific gravity, completes cleaning action, processing capacity is in 45t/h.It is dry
Net rubble and fine sand is taken away by blade, and last rubble and fine sand pour into blow tank from the impeller of rotation, obtains finished aggregate, by
Transport vehicle 10 transports outside the venue, handles for following resourceization, such as construction, prepare cement, wherein finished aggregate medium stone
Partial size >=5mm, the particle size range of sand is between 2-7mm.The slurry liquid of slurry liquid from the sand washer 1 washed after washing and screening is defeated
Outlet drains into mud ditch 2 through slurry liquid discharge guiding pipe 9, carries out subsequent processing.
(2) mud adjusts: will be sent the slurry liquid in mud ditch 2 by the first slurry pipeline 5 using mud push pump 7
Enter in mud adjustment tank 3, is that 1: 1000 (dosage of additive is according to field test according to the volume ratio of additive and slurry liquid
Determine), additive is added into mud adjustment tank 3, wherein additive includes the alum solution, quality that mass concentration is 7%
The demulsifier aqueous solution (polyacrylamide solution) that polyaluminum chloride aqueous solution that concentration is 15%, mass concentration are 7%, three
The volume ratio of person be 1: 2: 1, then quickly stirring, make mud demulsification, flocculation, rapid precipitation, filtering, obtain supernatant liquor and and
Excess sludge, wherein gained supernatant liquor is back in step (1) for carrying out washing to shield dregs.In the step, mainly
It is to be adjusted to slurry liquid, the processing time is total up to 2.5h.
(3) filters pressing: the excess sludge (moisture content is 80%~99%) for being obtained step (2) using sludge pressure pump 8 is logical
It crosses the second slurry pipeline 6 to send to filter press 4 (belt filter press) progress filters pressing, be made after mud cake (dehydration mud) by transport vehicle 10
It transports outside the venue, is recycled for following resourceization, such as building block.Filtrate a part that filters pressing generates is back to mud adjustment tank 3
Middle carry out circular treatment, a part is back in sand washer 1 washes for carrying out choosing to shield dregs.
Show day processing shield dregs up to 360t by test, generations coarse aggregate is 75t, partial size >=5mm, and fine sand is
140t, for particle size range between 2-7mm, dehydration mud (mud cake) moisture content is 65%.
Embodiment 3:
A kind of method of shield dregs in-situ processing and recycling, utilizes the shield dregs in the embodiments of the present invention 1
The system of in-situ processing and recycling handles shield dregs, comprising the following steps:
(1) washed-out sand: logical using the shield dregs (sand factor is 30%~70%) for excavating shield machine into dredge pump 12
It crosses shield mud dispatch tube 11 to be sent into the washing trough of sand washer 1, control revolving speed is 2r/min, is rolled under the drive of impeller, and mutually
Phase grinding removes the impurity on sandstone surface in covering dregs, destroys the steam layer of cladding sand grains, in favor of dehydration；Add water simultaneously,
Powerful water flow is formed, in time takes away the small foreign matter of impurity and specific gravity, completes cleaning action, processing capacity is in 50t/h.Clean
Rubble and sand are carefully taken away by blade, and last rubble and fine sand pour into blow tank from the impeller of rotation, finished aggregate are obtained, by transporting
Vehicle 10 transports outside the venue, handles for following resourceization, such as construction, prepare cement, wherein the grain of finished aggregate medium stone
Diameter >=5mm, the particle size range of sand is between 4-10mm.The slurry liquid washed after washing and screening is exported from the slurry liquid of sand washer 1
Mouth drains into mud ditch 2 through slurry liquid discharge guiding pipe 9, carries out subsequent processing.
(2) mud adjusts: will be sent the slurry liquid in mud ditch 2 by the first slurry pipeline 5 using mud push pump 7
Enter in mud adjustment tank 3, is that 1: 1000 (dosage of additive is according to field test according to the volume ratio of additive and slurry liquid
Determine), additive is added into mud adjustment tank 3, wherein additive includes the alum solution, quality that mass concentration is 7%
The demulsifier aqueous solution (polyacrylamide solution) that polyaluminum chloride aqueous solution that concentration is 15%, mass concentration are 8%, three
The volume ratio of person be 1: 2: 1, then quickly stirring, make mud demulsification, flocculation, rapid precipitation, filtering, obtain supernatant liquor and and
Excess sludge, wherein gained supernatant liquor is back in step (1) for carrying out washing to shield dregs.In the step, mainly
It is to be adjusted to slurry liquid, the processing time is total up to 2.5h.
(3) filters pressing: the excess sludge (moisture content is 80%~99%) for being obtained step (2) using sludge pressure pump 8 is logical
It crosses the second slurry pipeline 6 to send to filter press 4 (belt filter press) progress filters pressing, be made after mud cake (dehydration mud) by transport vehicle 10
It transports outside the venue, is recycled for following resourceization, such as building block.Filtrate a part that filters pressing generates is back to mud adjustment tank 3
Middle carry out circular treatment, a part is back in sand washer 1 washes for carrying out choosing to shield dregs.
Show day processing shield dregs up to 400t by test, generation coarse aggregate is 83.4t, partial size >=5mm, fine sand
For 155.6t, for particle size range between 4-10mm, dehydration mud (mud cake) moisture content is 65%.
Above embodiments are only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned reality
Apply example.All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It is noted that being led for this technology
For the those of ordinary skill in domain, improvements and modifications without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. the system of a kind of shield dregs in-situ processing and recycling, which is characterized in that the system comprises mud ditch (2), mud
Slurry adjustment tank (3), filter press (4) and the sand washer (1) for shield dregs to be eluted and sieved；The sand washer
(1) slurry liquid delivery outlet is connected to the slurry liquid input port of mud ditch (2), the slurry liquid delivery outlet of the mud ditch (2) with
Mud adjusts the slurry liquid input port connection of tank (3), and the mud adjusts excess sludge delivery outlet and filter press (4) of tank (3)
Excess sludge input port connection；The sand washer (1), mud adjustment tank (3) and filter press (4) are set to the upper of mud ditch (2)
Side, the mud ditch (2) are set to below the earth's surface of construction site.
2. the system of shield dregs in-situ processing according to claim 1 and recycling, which is characterized in that the mud ditch
(2) slurry liquid delivery outlet is connected to the slurry liquid input port of mud adjustment tank (3) by the first slurry pipeline (5), described
First slurry pipeline (5) is equipped with the mud push pump (7) for being transported to slurry liquid in mud adjustment tank (3)；It is described
Mud adjusts the excess sludge delivery outlet of tank (3) and the excess sludge input port of filter press (4) passes through the second slurry pipeline (6)
Connection, second slurry pipeline (6) are equipped with the sludge pressure pump for being delivered to excess sludge in filter press (4)
(8)。
3. the system of shield dregs in-situ processing according to claim 1 or 2 and recycling, which is characterized in that described to wash
The slurry liquid delivery outlet of sand machine (1) is connected to the slurry liquid input port of mud ditch (2) by slurry liquid discharge guiding pipe (9).
4. the system of shield dregs in-situ processing according to claim 1 or 2 and recycling, which is characterized in that the system
System further includes for transporting the transport vehicle (10) of finished aggregate or the middle dehydration mud of filter press (4) in sand washer (1).
5. the system of shield dregs in-situ processing according to claim 1 or 2 and recycling, which is characterized in that the system
System further includes shield mud dispatch tube (11), and the shield mud dispatch tube (11) is connected to shield machine mud discharging mouth (13)；The shield
Mud dispatch tube (11) be equipped with for by shield dregs be delivered in sand washer (1) into dredge pump (12).
6. the system of shield dregs in-situ processing according to claim 1 or 2 and recycling, which is characterized in that described to wash
Sand machine (1) is screw sand washer or bucket sand washer；Mud adjustment tank (3) is flocculation basin；The filter press (4) is belt
Filter press.
7. a kind of method of shield dregs in-situ processing and recycling, which is characterized in that the method uses claim 1 to 6
Any one of described in system to shield dregs carry out in-situ processing.
8. the method according to the description of claim 7 is characterized in that the following steps are included:
S1, shield dregs is transported to progress washing and screening in sand washer (1), obtains finished aggregate and slurry liquid；
S2, it will be transported in mud adjustment tank (3) and be adjusted in slurry liquid obtained in step S1, obtain supernatant liquor and surplus
Remaining sludge；
S3, excess sludge obtained in step S2 is delivered to filter press (4) progress filters pressing, completes the processing to shield dregs.
9. the method for shield dregs in-situ processing according to claim 8 and recycling, which is characterized in that the step S1
In, the revolving speed of control sand washer (1) is 1r/min~2r/min；The sand factor of the shield dregs is 30%~70%；It is described
Finished aggregate includes rubble and fine sand；Partial size >=5mm of the rubble；The partial size of the fine sand is 0.15mm~10mm；It is described
Finished aggregate is transported to be utilized for following resourceization outside the venue；
It is described to be adjusted to for alum solution, polyaluminum chloride aqueous solution and demulsifier aqueous solution to be added in the step S2
Mud adjusts in tank (3), stirring, makes mud demulsification, flocculation, precipitates, and filtering obtains supernatant liquor and excess sludge；It is stated clearly
The volume ratio of alum aqueous solution, polyaluminum chloride aqueous solution and demulsifier aqueous solution is 1: 2: 1；The quality of the alum solution is dense
Degree is 5%~15%；The mass concentration of the polyaluminum chloride aqueous solution is 5%~15%；The matter of the demulsifier aqueous solution
Measuring concentration is 5%~15%；The supernatant liquor is back in step S1 for carrying out washing to shield dregs；
In the step S3, the moisture content of the excess sludge is 80%~99%；The dehydration mud transhipment obtained after the filters pressing
To outside the venue for following resourceization utilization；The filtrate a part obtained after the filters pressing flows back into step S2 for slurry liquid
It is adjusted, another part is back in step S1 for carrying out washing to shield dregs.
10. the method for shield dregs in-situ processing according to claim 9 and recycling, which is characterized in that the step
In S2, the demulsification agent solution is polyacrylamide solution.
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| CN110738408A (en) * | 2019-10-10 | 2020-01-31 | 中国铁道科学研究院集团有限公司电子计算技术研究所 | shield segment production and assembly information management system |
| CN111547976A (en) * | 2020-05-13 | 2020-08-18 | 中铁二十二局集团轨道工程有限公司 | Mud-rock residue soil mud-water separation construction method |
| CN112593971A (en) * | 2020-12-15 | 2021-04-02 | 浙江海洋大学 | Subway tunnel shield constructs construction with sediment waste discharge device that falls |
| CN112960888A (en) * | 2021-02-05 | 2021-06-15 | 绿润环境科技(宁波)有限公司 | Sludge treatment system and treatment method thereof |
| CN115417613A (en) * | 2022-08-23 | 2022-12-02 | 中铁工程服务有限公司 | Engineering muck grouting treatment method |
| CN115721974A (en) * | 2023-01-28 | 2023-03-03 | 中铁电气化局集团有限公司 | Slurry circulation preparation grouting system behind shield muck wall |
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| CN115721974B (en) * | 2023-01-28 | 2023-04-04 | 中铁电气化局集团有限公司 | Slurry circulation preparation grouting system behind shield muck wall |
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