CN104858048A - Residue soil environmental regenerating retreatment method and equipment by adoption of earth pressure balance shield - Google Patents
Residue soil environmental regenerating retreatment method and equipment by adoption of earth pressure balance shield Download PDFInfo
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- CN104858048A CN104858048A CN201510228018.1A CN201510228018A CN104858048A CN 104858048 A CN104858048 A CN 104858048A CN 201510228018 A CN201510228018 A CN 201510228018A CN 104858048 A CN104858048 A CN 104858048A
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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Abstract
The invention provides a residue soil environmental regenerating retreatment method and equipment by adoption of earth pressure balance shield. In the invention, water is utilized in a completely closed cycle so that new water is necessarily added into a system during the initial stage of production. After stable production, new water is no longer consumed. Even when high water content of residue soil is discharged by the shield, a part of tail water of a liquid filtering pool is necessarily discharged on the regular basis/at any moment. Therefore, the amount of residue soil outputted as waste residue is decreased so that cost of land occupation is saved. Mud cakes dehumidified by a filter press has certain utilization value so that the mud cakes are more suitable for landfill (especially backfill) or direct discharge (such as accumulation) and are also applicable to production of tiles so that damage and consumption to arable lands or resources are decreased. Reclamation of sand-gravel aggregates correspondingly reduces environmental cost caused by digging of sandstones in the equivalent amount. The residue soil environmental regenerating retreatment method and the equipment by adoption of the earth pressure balance shield have prominent resources and environment benefits and economic benefit.
Description
Technical field
The present invention relates to earth pressure balanced shield, EPBS dregs processing method and equipment, for the environmental friendly regenerated utilization of dregs.
Background technology
At present, at home in subway and various constructing tunnel, extensively adopt earth pressure balanced shield, EPBS driving technology.The features such as this driving method has soil layer wide accommodation, driving speed is fast, cost is low, construction safety.According to interrelated data introduction, in a line, big city, two wires, often have up to a hundred balancing earth-pressure shielding machines to carry out various tunnel construction at the same time, about there are 800 balancing earth-pressure shielding machines in the whole nation in work.But, because subway tunnel is generally all in two, 30 meters, underground, the even degree of depth of tens meters, so the dregs (" dregs " herein all refers to the dregs that EPB shield tunneling is discharged) that EPB shield tunneling is discharged all can contain large quantity of moisture, is even in half flow regime.If do not carry out separating treatment and dehydration to dregs, can give to rafting outside dregs and defeatedly bring very big inconvenience, cost of transportation is high, and shipment efficiency is low, and spill pollution road, dregs cannot be piled high, and occupied ground is large.Due to local government and environmental administration, the discharge to dregs strictly limits, being normally restricted of construction.
1, in the past, the dregs that earth pressure balanced shield, EPBS digs out is adopt the processing method directly transporting to appointed place stacking or landfill substantially.Now for certain subway earth pressure balanced shield, EPBS engineering (hereinafter referred to as " certain engineering "), dregs processing cost and the pollution condition that may cause are described.
(1) dregs discharge cost of transportation is high.In certain engineering, wherein certain bid section total length is the bifilar tunnel of 2.4km, diameter 6.28 meters, produce the loose dregs of about 9.7 ten thousand steres.By the 75 yuan of calculating of discharge every cube of dregs freight charges, these dregs are transported and approximately needs 7,280,000 yuan of freight charges.If the subway of 24 kilometers long, dregs freight charges will reach more than 7,000 ten thousand yuan.
(2) dump dregs to need to take to stack place in a large number, costly.If be deposited in by above-mentioned 9.7 ten thousand stere dregs on the ground of 1 hectare (15 mu, 10,000 square meters), need heap high 9.7 meters.Same as above, the subway of 24 kilometers long, discarded dregs just needs is piled high 9.7 meters on 150 mu of soils.
(3) dregs water content is high.The dregs that earth pressure balanced shield, EPBS digs out has the water content up to more than 40%, sometimes even presents semi-fluid state.Owing to containing clay component in dregs, these moisture can not be separated with dregs rapidly.If such high-moisture dregs transports with general lorry, can seriously spill in transit, due to the environmental administration at different levels dregs that nearly all limiting emission is such (this type of situation is of common occurrence), project progress often had a strong impact on and engineering cost by corresponding raising.
2, according to available data display, in the dregs that certain engineering is dug out, the sandstone of nearly 1/3rd are the inorganic raw materials of recoverable.In 2.4 kilometers of engineerings, about have the useful sand material of 3.2 ten thousand steres, value can reach 3,200,000 yuan.In 24 kilometers of subway engineerings, then contain the useful sandstone material being worth more than 3,000 ten thousand yuan.
But due to the high-moisture of dregs, common screening is difficult to sieve the dregs composition of different-grain diameter, and especially, sieve aperture is very easily blocked by the clay component of High water cut (mud).
Visible, institute's problems faced, neither the separation of simple different-grain diameter composition, dehydration that neither be simple, also can not be that the process of " first dewater, sieve " is (because to the bulky grain composition both containing 20 to 200mm, the dregs simultaneously again containing clay component is difficult to fast dewatering.)
The economy of these problems, society, Significance for Environment, be not limited in above-mentioned.Capital construction occupies very large proportion in China's economy.The resource consumption of the production of construction material is a huge challenge always; Local at some, building materials are fired and are fetched earth, and cause the destruction of large-area cultivated land resource; Local at other, often can see the endocrator adopted sand and leave over.Form distinct contrast therewith, at the periphery in a lot of city, but have much huge dregs heap, trees have been planted in wherein a lot of tops, show these dregs heap by as permanent accumulation.The soil of surrounding city, no matter as ploughing or as construction land, be all extremely precious, in addition the accumulation of dregs being unstable, easily caves in, and is also serious dust pollution source.If not have no alternative, be the soil of surrounding city will not be used for stacking dregs.
While be in order to obtain sandstone, brickmaking fetches earth and destroys large quantities of arable land and territory, another side is then take a large amount of valuable soil to dispose capital construction dregs, cause the main cause of this situation, it is the sorting recovery problem of dregs itself, it had both shown as technical limitation, and what be also embodied in efficiency is low.Bricks and Tiles Plant will inevitably addressing with building clay distribution in (be substantially all high-quality plough), to take clay on the spot, both eliminated the cost of long-distance transport clay, saved again or reduced the cost of sorting raw material (clay).Equally, the inevitable addressing in sandpit, in the position in high-quality sandstone ore deposit, if the available sandstone content in a battle field is lower, does not just have business to dig and adopts value.So, the recycling of dregs, with clay, sandstone " exploitation " compared with, economic benefit suffers inferior position, this inferior position be affect dregs recycle restraining factors.
At present, the actual treatment method of some construction parties is that these dregs are stacked, and after its dehydration, then carries out the separation such as screening to it; Some places are really piled up the dregs of surrounding city and are carried out separation reprocessing, by screening clay wherein and the sandstone of different-grain diameter, carry out the recycling of dregs, and correspondingly reduce accumulation occupation of land.But such way has serious problems, comprising:
1) first, dregs (may be semi-fluid) be transported to aheap from building site, the difficulty in transportation technology, to drop be all problem and restriction;
2) accumulation needs occupied ground;
3) because the dewatering speed of clay component is very slow, so need very large stacking area could meet dehydration requirement;
4) moisture in dregs contains the compositions such as shield structure agent, stacks the moisture infiltration natural water that dehydration can make these contain the agent of shield structure, causes corresponding pollution to the latter;
5) because clay component in dregs and sandstone composition mix, some small bits of clay can be bonded on sand particles; These clay components be bonded on sand particles are not separated by screening and sand particles, so containing the clay component be bonded on sand particles in the sandstone of screening acquisition; Such sandstone poor quality, even cannot meet the requirement of construction.Such as, if such sandstone is used in concrete, then concrete intensity can seriously reduce, and even cannot meet design requirement.
6) such process will through steps such as " transport-accumulation-(dehydration)-screening-entrucking-transports ", and link is too much.
The high cost that these problems result in " accumulation-reprocessing ", recycles deficiency in economic performance, and has relevant natural water pollution problem.A lot of place also would rather be reluctant to do subsequent treatment to the dregs piled up piling up permanence, is exactly the too poor direct embodiment of this " accumulation-reprocessing " economic benefit.
To territory, environmental resource these directly injure or waste, the outstanding contradiction reflecting construction and development, also show and reclaim the social benefit of dregs: every recycle side's dregs more, just equal a few side plough fetch earth, a few side river course digs sand, a few side piles up and takes up an area.
Therefore, a kind of effective solution is badly in need of, to carry out in-situ processing effectively and rapidly to above-mentioned dregs.
Summary of the invention
According to an aspect of the present invention, provide a kind of earth pressure balanced shield, EPBS dregs processing method, described dregs is the dregs that earth pressure shield tunneling machine is discharged, and it is characterized in that comprising:
With the drag conveyor being seated in point feed bin bottom with bottom opening, continuously the dregs fallen from described point of feed bin is sent into primary vibration sieve, and by drag conveyor priming apparatus to drag conveyor shower water, by primary vibration sieve priming apparatus to the upper shower water of primary vibration sieve, to dilute dregs;
The screenings of primary vibration sieve is sent into the first agitator through the first slurry storage tank;
Mud the first Pulp pump after stirring through the first agitator is delivered to secondary vibration sieve;
By secondary vibration sieve priming apparatus to the upper shower water of secondary vibration sieve, the dregs on secondary vibration sieve is diluted;
The oversize of secondary vibration sieve is dropped down onto slag field;
Slurries under the sieve of secondary vibration sieve are sent into the second slurry storage tank;
The the second Pulp pump pressurization of the slurries of the second slurry storage tank is pumped into one-level cyclone;
The overflow portion of the slurries after one-level cyclone classification is sent into the second agitator, the underflow part of the slurries after one-level cyclone classification is sent into sand washer;
Add water with sand washer priming apparatus sand washer, the underflow part of described slurries is washed, and the particle after washing is sent into three grades of vibratory sieves;
By three grades of vibratory sieve priming apparatus to shower water on three grades of vibratory sieves, the particle on three grades of vibratory sieves is diluted;
Slurries under the sieve of three grades of vibratory sieves are sent into described second slurry storage tank, to proceed circulation classification to slurries under this sieve;
The overflow portion of the slurries of sand washer is sent into described second agitator;
The 3rd Pulp pump pressurization of the slurries through stirring in second agitator is pumped into second cyclone, to carry out classification;
Overflow slurry after second cyclone classification is sent into the 3rd agitator, and wherein said 3rd agitator is communicated with on top with the second agitator, and the low concentration slurries namely in the second agitator can overflow in the 3rd agitator from top;
The low concentration slurries after stirring in 3rd agitator are transported to the first agitator with the 4th Pulp pump, thus the mud in dilution the first agitator;
The bottom slurry of second cyclone is sent into the 4th agitator;
The slurries membrane pump after stirring in 4th agitator is sent into filter press and carries out filter-press dehydration.
According to another aspect of the present invention, provide a kind of earth pressure balanced shield, EPBS dregs treatment facility, described dregs is the dregs that earth pressure shield tunneling machine is discharged, and it is characterized in that comprising:
Be seated in the drag conveyor of point feed bin bottom with bottom opening, for continuously the dregs fallen from described point of feed bin being sent into primary vibration sieve;
Drag conveyor priming apparatus, for drag conveyor shower water, to dilute dregs;
Primary vibration sieve priming apparatus, for the upper shower water of primary vibration sieve, to dilute dregs;
First slurry storage tank, the screenings for primary vibration is sieved sends into the first agitator;
Described first agitator;
First Pulp pump, delivers to secondary vibration sieve for the mud after described first agitator is stirred;
Described secondary vibration sieve;
Secondary vibration sieve priming apparatus, for the upper shower water of secondary vibration sieve, dilutes the dregs on secondary vibration sieve;
Second slurry storage tank, for accept secondary vibration sieve sieve under slurries;
Second Pulp pump, for pumping into one-level cyclone the slurries pressurization in the second slurry storage tank;
One-level cyclone, for carrying out classification to above-mentioned slurries,
Second agitator, for receiving by the overflow portion of the slurries of one-level cyclone classification,
Sand washer, it receives the underflow part of the slurries after one-level cyclone classification;
Sand washer priming apparatus, for adding water to sand washer, washs the underflow part of described slurries;
Three grades of vibratory sieves, it receives the particle after washing;
Three grades of vibratory sieve priming apparatus, for shower water on three grades of vibratory sieves, dilute the particle on three grades of vibratory sieves, wherein
Under the sieve of three grades of vibratory sieves, slurries are admitted to described second slurry storage tank, to proceed circulation classification to slurries under this sieve,
The overflow portion of the slurries of sand washer is sent into described second agitator,
3rd Pulp pump, for pumping into second cyclone, to carry out classification the pressurization of the slurries through stirring in the second agitator;
3rd agitator, it receives the overflow slurry after second cyclone classification, and wherein said 3rd agitator is communicated with on top with the second agitator, and the low concentration slurries namely in the second agitator can overflow in the 3rd agitator from top;
4th Pulp pump, for the low concentration slurries after stirring in the 3rd agitator are transported to the first agitator, thus the mud in dilution the first agitator;
4th agitator, it receives the bottom slurry of second cyclone;
Membrane pump, for delivering to filter press the slush pump after stirring in the 4th agitator;
Described filter press, carries out filter-press dehydration for the slurries come membrane pump pumping.
Accompanying drawing explanation
Fig. 1 is the Plant arrangement figure of EPB shield tunneling dregs separation equipment according to an embodiment of the invention.
Fig. 2 is the flow chart of earth pressure balanced shield, EPBS dregs separating technology according to an embodiment of the invention.
Description of reference numerals:
1-storing divides feed bin 2-drag conveyor 3-primary vibration to sieve 4-first slurry storage tank 5-first agitator 6-first Pulp pump 7-secondary vibration sieve 8-second slurry storage tank 9-second Pulp pump 10-one-level cyclone 11-second agitator 12-sand washer 13-tri-grades of vibratory sieve 14-the 3rd Pulp pump 15-second cyclone 16-the 3rd agitator 17-the 4th Pulp pump 18-the 4th agitator 19-membrane pump 20-filter press 21-reservoir 22-clear water reserviors 23-storing and divides feed bin priming apparatus 24-drag conveyor priming apparatus 25-mono-vibration level sieve priming apparatus 26-secondary vibration sieve priming apparatus 27-tri-grades of vibratory sieve priming apparatus 28-sand washer priming apparatus
Detailed description of the invention
For the problems referred to above of prior art, the applicant conducts in-depth research, especially in conjunction with the actual conditions of earth pressure balanced shield, EPBS construction and the feature of discharge dregs, through laboratory repetition test and concentrating on studies, propose the regenerated environment protecting processing method that EPB shield tunneling of the present invention discharges dregs, it is by optimizing dregs separation process scheme, reasonable disposition process equipment, the every technical parameter of Optimal Setting, efficient on-the-spot separation can be carried out to dregs, process, greatly reduce discarded dregs discharge capacity, reclaim valuable sandstone material, decrease the destruction of emission to environment.
3, technical process explanation
As shown in Figure 1 and Figure 2, the storing that the dregs that shield machine (not shown) is discharged is poured over bottom opening divides feed bin 1, primary vibration sieve 3 sent into by dregs by drag conveyor 2 continuously that be seated in point feed bin 1 bottom, on point feed bin 1, drag conveyor 2 and primary vibration sieve 3, spray clear water (or recirculated water) respectively by point feed bin priming apparatus 23, a drag conveyor priming apparatus 24 and primary vibration sieve priming apparatus 25 simultaneously, dregs is diluted; After the scalping screening of primary vibration sieve 3, tentatively can realize being separated of bulk footpath material and mud, the oversize of primary vibration sieve 3 drops down onto slag field; According to one embodiment of present invention, this partial material main component is the gravel, cobble, ball clay etc. of granularity at 20 to 200mm, and stone can be used as after reclaiming and paves the way, makes foundation material; The screenings of primary vibration sieve 3 enters the first slurry storage tank 4 and the first agitator 5.Mud delivers to secondary vibration sieve 7 with the first Pulp pump 6 after agitator 5 stirs, and sprays clear water (or recirculated water), dilute dregs by secondary vibration sieve priming apparatus 26 on secondary vibration sieve 7; The oversize of secondary vibration sieve 7 is sand materials of medium grain size (relative bulk footpath material), drops down onto slag field to be recycled; According to one embodiment of present invention, the main component of the sand material of this medium grain size is the stone of granularity at 5 to 20mm, can be used as aggregate after recovery; Under the sieve of secondary vibration sieve 7, slurries enter the second slurry storage tank 8; Slurries in second slurry storage tank 8 are pumped into one-level cyclone 10 by the second Pulp pump 9 pressurization.Slurries are after cyclone 10 classification, overflow portion enters the second agitator 11, bottom slurry enters sand washer 12, added water by sand washer priming apparatus 28 pairs of sand washers 12, bottom slurry is cleaned, particle after washing is sent into three grades of vibratory sieves 13 by sand washer 12, sprays clear water (or recirculated water), dilute the particle on three grades of vibratory sieves 13 by three grades of vibratory sieve priming apparatus 27 on three grades of vibratory sieves 13; The oversize of three grades of vibratory sieves 13 is sand materials of small particle diameter (relative medium grain size material), drops down onto slag field to be recycled; According to one embodiment of present invention, the sandstone material main component of this small particle diameter is the sand of granularity at 0.15 to 5mm, can be used as the raw material of tunnel grouting after recovery; Under the sieve of three grades of vibratory sieves 13, slurries also enter the second slurry storage tank 8, to be continued circulation classification.The overflow slurry of sand washer 12 flows into the second agitator 11; Slurries in agitator 11 are pumped into second cyclone 15 to carry out classification by the 3rd Pulp pump 14 pressurization after stirring.
Owing to being added water by sand washer priming apparatus 28 pairs of sand washers 12, bottom slurry is cleaned, particle after washing is sent into three grades of vibratory sieves 13 by sand washer 12, and owing to spraying clear water on secondary vibration sieve 7 and three grades of vibratory sieves 13, its oversize (sand material (stone as 5 to 20mm) of medium grain size, the sand material (sand as 0.15 to 5mm) of small particle diameter) all pass through washing and effectively eliminate the small bits of clay be bonded on sand particles, thus the sand material of high-quality is become, avoid the major defect of the isolated sand material quality caused due to mixing of clay component in aforementioned prior art.
Overflow slurry after second cyclone 15 classification enters the 3rd agitator 16.3rd agitator 16 is communicated with on top with the second agitator 11, and the low concentration slurries namely in agitator 11 can overflow in agitator 16 from top.Low concentration slurries in 3rd agitator 16 are transported to the first agitator 5 by the 4th Pulp pump 17 after stirring, and play the effect of mud in dilution first agitator 5; The bottom slurry of second cyclone 15 enters the 4th agitator 18.Slurries in 4th agitator 18 are sent into filter press 20 by membrane pump 19 and are dewatered after stirring.The recyclable backfill soil of doing of mud cake after dehydration utilizes, or remaining dregs stacking field of can transporting to eaily is stored up.Here, by the classification of second cyclone 15 pairs of slurries, the bottom slurry concentration of second cyclone 15 can be improved, thus improve the dewatering efficiency of filter press 20.The filtrate water that filter press 20 is discharged enters reservoir 21, recycles, or outer row after regularly process.Mud cake after filter press dehydration, or there is certain value, be more suitable for landfill (especially backfilling) or directly discharge (such as piling up) process.Mud cake also may be used for making the building materials such as brick and tile, because it is through separation screening, has higher quality, is thus more suitable for the raw material made as brick and tile, thus the destruction of corresponding reduction arable land, environment and consumption.
Clear water reserviors 22 are guarantee water sources of all shower waters in the solution of the present invention, flushing water, supplementing water and Pulp pump water seal water.When the filtrate water that filter press 20 is discharged is available, system flow of the present invention to utilize filtrate water, otherwise is added in system with regard to needing to extract clear water from clear water reserviors 22.
Comprise according to feature of the present invention, advantage and/or beneficial effect:
A) drag conveyor 2 is adopted to sieve 3 continuous uniform feedings to primary vibration, and divide feed bin priming apparatus 23, drag conveyor priming apparatus 24, primary vibration to sieve priming apparatus 25 to dregs spray clear water or recirculated water by storing in feeding and screening process, make half mobility mud change the mud of the good fluidity of high-moisture into, effectively achieve the screening requirement of primary vibration sieve 3;
B) in technological process, be configured with sand washer 12 and multiple agitator 5,11,16, sand washer 12 is utilized to effectively reduce the clay of sand material surface adhesion, agitator 5,11,16 is utilized to smash ball clay in mud, avoid these ball claies to be mixed in sandstone material, thus effectively ensure that recovery sand material quality;
C) in links such as secondary screening, three grades of screenings and washed-out sands, spray has been installed and has added clear water or circulating water device 26,27,28,, thus can according to field condition, regulable control amount of water, control the reasonable concentration of mud, make separation, classification and cleaning performance reach optimum state.
D) Equipments Setting of the present invention and Process operating parameters according to circumstances (can comprise: dregs process lot size, stratum geological condition, user are to the granularity requirements etc. reclaiming sand material) and adjusting targetedly, thus have adaptability widely according to the environmental friendly regenerated processing scheme of this earth pressure balanced shield, EPBS dregs of the present invention.
The effect of expection example
If apply the present invention in certain engineering, analyze by measuring and calculating, income can be obtained and comprise:
1, in the subway engineering that 2.4km is long, roach slag discharge capacity 1/3rd can be reduced, save freight charges 2,400,000 yuan, reduce occupation of land 5 mu;
2, because isolated stone, ball clay and the mud cake through filter press dehydration are convenient to transport, the transporter that engineering contractor (enforcement side of the present invention) can transport with responsible stone, mud cake consults to reduce the freight, and it is 1,300,000 yuan that these freight charges reduce estimation number;
3, recyclable sand material 3.2 ten thousand stere, the creation of value 3,200,000 yuan;
4, save above and the value that creates adds up to more than 6,900,000 yuan, equipment investment and operating cost budget totally 510 ten thousand yuan, both offset, and only the dregs process of the subway engineering of 2.4km can create economic benefit 1,800,000 yuan.
5, in the solution of the present invention, because water is that complete closed cycle utilizes, so just need to add new water in system at the production initial stage, after administration measure, substantially no longer consumption of new water.Even when the dregs water content of shield structure discharge is very high, also need regularly outer tail water of draining in a part of reservoir.
6, because finally as the cost of floor space that the minimizing of the dregs amount of waste residue output is saved.
7, the mud cake after filter press dehydration, or there is certain value, be more suitable for landfill (especially backfilling) or directly discharge (such as piling up) process; Also may be used for the making of brick and tile, reduce destruction and the consumption of arable land or resource.
8, the utilization of above-mentioned 3rd sand material reclaimed, correspondingly reduces equivalent sandstone and excavates caused Environmental costs.
9, owing to being added water by sand washer priming apparatus 28 pairs of sand washers 12, bottom slurry is cleaned, particle after washing is sent into three grades of vibratory sieves 13 by sand washer 12, and owing to spraying clear water on secondary vibration sieve and three grades of vibratory sieves, its oversize (sand material (stone as 5 to 20mm) of medium grain size, the sand material (sand as 0.15 to 5mm) of small particle diameter) all pass through washing and effectively eliminate the small bits of clay be bonded on sand particles, thus the sand material of high-quality is become, avoid the major defect of the isolated sand material quality caused due to mixing of clay component in prior art.Significantly improve the economic benefit that dregs is separated, also significantly improve the value of dregs.
Resource, the environmental benefit of above 5-9 item, cannot direct monetary value weigh, but extremely important and significant beyond doubt.
In sum, the solution of the present invention can realize effective separation and the dehydration of earth pressure balance being discharged to dregs, reduces discarded dregs discharge capacity, recycles the sand material in dregs, alleviate the destruction to environment.The present invention is the one effectively successfully scheme solving an earth pressure balanced shield, EPBS dregs process difficult problem, and its popularizing application prospect is extremely wide.
Claims (10)
1. earth pressure balanced shield, EPBS dregs processing method, described dregs is the dregs that earth pressure shield tunneling machine is discharged, and it is characterized in that comprising:
With the drag conveyor (2) being seated in point feed bin (1) bottom with bottom opening, primary vibration sieve (3) sent into by the dregs that will fall from described point of feed bin (1) continuously, and by drag conveyor priming apparatus (24) to drag conveyor (2) shower water, and sieve priming apparatus (25) to the upper shower water of primary vibration sieve (3), to dilute dregs by primary vibration;
Screenings primary vibration being sieved (3) sends into the first agitator (5) through the first slurry storage tank (4);
Mud the first Pulp pump (6) after stirring through the first agitator (5) is delivered to secondary vibration sieve (7);
Sieve priming apparatus (26) to the upper shower water of secondary vibration sieve (7) by secondary vibration, the dregs in secondary vibration sieve (7) is diluted;
Oversize secondary vibration being sieved (7) drops down onto slag field;
Under secondary vibration being sieved the sieve of (7), slurries send into the second slurry storage tank (8);
The second Pulp pump (9) pressurization of slurries in second slurry storage tank (8) is pumped into one-level cyclone (10);
The overflow portion of the slurries after one-level cyclone (10) classification is sent into the second agitator (11), the underflow part of the slurries after one-level cyclone (10) classification is sent into sand washer (12);
With sand washer priming apparatus (28), sand washer (12) is added water, the underflow part of described slurries is washed, and the particle after washing is sent into three grades of vibratory sieves (13);
By three grades of vibratory sieve priming apparatus (27) to the upper shower water of three grades of vibratory sieves (13), the particle on three grades of vibratory sieves (13) is diluted;
Slurries under the sieve of three grades of vibratory sieves (13) are sent into described second slurry storage tank (8), to proceed circulation classification to slurries under this sieve;
The overflow portion of the slurries of sand washer (12) is sent into described second agitator (11);
The 3rd Pulp pump (14) pressurization of the slurries through stirring in second agitator (11) is pumped into second cyclone (15), to carry out classification;
Overflow slurry after second cyclone (15) classification is sent into the 3rd agitator (16), wherein said 3rd agitator (16) is communicated with on top with the second agitator (11), and the low concentration slurries namely in the second agitator (11) can overflow in the 3rd agitator (16) from top;
The low concentration slurries after stirring in 3rd agitator (16) are transported to the first agitator (5) with the 4th Pulp pump (17), thus the mud in dilution the first agitator (5);
The bottom slurry of second cyclone (15) is sent into the 4th agitator (18);
The slurries membrane pump (19) after stirring in 4th agitator (18) is sent into filter press (20) and carries out filter-press dehydration.
2. earth pressure balanced shield, EPBS dregs processing method according to claim 1, is characterized in that comprising further:
Dregs is poured in a point feed bin (1),
Add water to a point feed bin (1) with point feed bin priming apparatus (23).
3. earth pressure balanced shield, EPBS dregs processing method according to claim 1, is characterized in that comprising further:
Oversize primary vibration being sieved (3) drops down onto slag field, and the oversize of described primary vibration sieve (3) is bulk footpath material, and its main component is granularity at the gravel of 20mm to 200mm, cobble and/or ball clay;
Oversize secondary vibration being sieved (7) drops down onto slag field, and the oversize of this secondary vibration sieve (7) is the sand material of medium grain size, and its main component is the stone of granularity at 5mm to 20mm;
The oversize of described three grades of vibratory sieves (13) is the sand material of small particle diameter, and its main component is the sand of granularity at 0.15mm to 5mm.
4. earth pressure balanced shield, EPBS dregs processing method according to claim 1, is characterized in that:
The water of drag conveyor (2), primary vibration sieve (3), secondary vibration sieve (7), three grades of upper sprays of vibratory sieve (13) is mixing waters of recirculated water, clear water and/or recirculated water and clear water,
Wherein,
Described clear water from clear water reserviors (22),
Described recirculated water is from reservoir (21), and the filtrate water that wherein filter press (20) is discharged enters reservoir (21),
When the filtrate water that filter press (20) is discharged is sufficient, described earth pressure balanced shield, EPBS dregs processing method uses filtrate water, otherwise supplies water with the spray met on drag conveyor (2), primary vibration sieve (3), secondary vibration sieve (7), three grades of vibratory sieves (13) with regard to extracting clear water as required from clear water reserviors (22).
5. earth pressure balanced shield, EPBS dregs processing method according to claim 4, is characterized in that:
After the stable circulation of the water to drag conveyor (2), primary vibration sieve (3), secondary vibration sieve (7), three grades of upper sprays of vibratory sieve (13), when the water content of the dregs that shield structure is discharged exceedes the water consumption needed for this circulation, the tail water in reservoir of regularly and/or at any time draining (21).
6. earth pressure balanced shield, EPBS dregs treatment facility, described dregs is the dregs that earth pressure shield tunneling machine is discharged, and it is characterized in that comprising:
Be seated in the drag conveyor (2) of point feed bin (1) bottom with bottom opening, send into primary vibration sieve (3) for the dregs that will fall from described point of feed bin (1) continuously;
Drag conveyor priming apparatus (24), for drag conveyor (2) shower water, to dilute dregs;
Primary vibration sieve priming apparatus (25), for the upper shower water of primary vibration sieve (3), to dilute dregs;
First slurry storage tank (4), the screenings for primary vibration being sieved (3) sends into the first agitator (5);
Described first agitator (5);
First Pulp pump (6), delivers to secondary vibration sieve (7) for the mud after described first agitator (5) is stirred;
Described secondary vibration sieve (7);
Secondary vibration sieve priming apparatus (26), for the upper shower water of secondary vibration sieve (7), dilutes the dregs in secondary vibration sieve (7);
Second slurry storage tank (8), for accept secondary vibration sieve (7) sieve under slurries;
Second Pulp pump (9), for pumping into one-level cyclone (10) the slurries pressurization in the second slurry storage tank (8);
One-level cyclone (10), for carrying out classification to above-mentioned slurries,
Second agitator (11), for receiving by the overflow portion of the slurries of one-level cyclone (10) classification,
Sand washer (12), it receives the underflow part of the slurries after one-level cyclone (10) classification;
Sand washer priming apparatus (28), adds water for giving sand washer (12);
Sand washer priming apparatus (28), for adding water to sand washer (12), washs the underflow part of described slurries;
Three grades of vibratory sieves (13), it receives the particle after washing;
Three grades of vibratory sieve priming apparatus (27), for the upper shower water of three grades of vibratory sieves (13), dilute the particle on three grades of vibratory sieves (13), wherein
Under the sieve of three grades of vibratory sieves (13), slurries are admitted to described second slurry storage tank (8), to proceed circulation classification to slurries under this sieve,
The overflow portion of the slurries of sand washer (12) is sent into described second agitator (11),
3rd Pulp pump (14), for pumping into second cyclone (15), to carry out classification the pressurization of the slurries through stirring in the second agitator (11);
3rd agitator (16), it receives the overflow slurry after second cyclone (15) classification, wherein said 3rd agitator (16) is communicated with on top with the second agitator (11), and the low concentration slurries namely in the second agitator (11) can overflow in the 3rd agitator (16) from top;
4th Pulp pump (17), for the low concentration slurries after stirring in the 3rd agitator (16) are transported to the first agitator (5), thus the mud in dilution the first agitator (5);
4th agitator (18), it receives the bottom slurry of second cyclone (15);
Membrane pump (19), for delivering to filter press (20) the slush pump after stirring in the 4th agitator (18);
Described filter press (20), carries out filter-press dehydration for the slurries come membrane pump (19) pumping.
7. earth pressure balanced shield, EPBS dregs treatment facility according to claim 6, is characterized in that:
The oversize of primary vibration sieve (3) is dropped down onto slag field, and the oversize of described primary vibration sieve (3) is bulk footpath material, and its main component is granularity at the gravel of 20mm to 200mm, cobble and/or ball clay;
The oversize of secondary vibration sieve (7) is dropped down onto slag field, and the oversize of this secondary vibration sieve (7) is the sand material of medium grain size, and its main component is the stone of granularity at 5mm to 20mm;
The oversize of described three grades of vibratory sieves (13) is the sand material of small particle diameter, and its main component is the sand of granularity at 0.15mm to 5mm.
8. earth pressure balanced shield, EPBS dregs treatment facility according to claim 6, is characterized in that:
The water of drag conveyor (2), primary vibration sieve (3), secondary vibration sieve (7), three grades of upper sprays of vibratory sieve (13) is mixing waters of recirculated water, clear water and/or recirculated water and clear water,
Wherein,
Described clear water from clear water reserviors (22),
Described recirculated water is from reservoir (21), and the filtrate water that wherein filter press (20) is discharged enters reservoir (21),
When the filtrate water that filter press (20) is discharged is sufficient, described earth pressure balanced shield, EPBS dregs treatment facility uses filtrate water, otherwise supplies water with the spray met on drag conveyor (2), primary vibration sieve (3), secondary vibration sieve (7), three grades of vibratory sieves (13) with regard to extracting clear water as required from clear water reserviors (22).
9. earth pressure balanced shield, EPBS dregs treatment facility according to claim 8, is characterized in that:
After the stable circulation of the water to drag conveyor (2), primary vibration sieve (3), secondary vibration sieve (7), three grades of upper sprays of vibratory sieve (13), when the water content of the dregs that shield structure is discharged exceedes the water consumption needed for this circulation, the tail water in reservoir (21) regularly and/or is at any time drained.
10. earth pressure balanced shield, EPBS dregs treatment facility according to claim 6, is characterized in that:
Dregs is poured onto in a point feed bin (1),
Described earth pressure balanced shield, EPBS dregs treatment facility comprises further: storing divides feed bin priming apparatus (23), for adding water to a point feed bin (1).
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