CN214270628U - Integrated shield tunneling machine mud-water separation system - Google Patents
Integrated shield tunneling machine mud-water separation system Download PDFInfo
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- CN214270628U CN214270628U CN202022843484.XU CN202022843484U CN214270628U CN 214270628 U CN214270628 U CN 214270628U CN 202022843484 U CN202022843484 U CN 202022843484U CN 214270628 U CN214270628 U CN 214270628U
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Abstract
The utility model discloses a shield constructs quick-witted mud-water separation system integrates, including shale shaker system, degritting swirler, desilting swirler, centrifugal separation system, thick liquid adjustment system, the separation of coarse grain adopts the three-layer shale shaker. The cyclone separation system adopts two stages of cyclones for treatment, namely a cyclone sand remover and a deslimer. The centrifugal separation system accelerates the settling speed of solid-phase particles to realize solid-liquid separation. And the slurry adjusted by the slurry adjusting system is conveyed to the shield machine by the slurry conveying pump. By adopting the processing process flow of screening, desanding, desliming and centrifuging, the method can ensure that the soil cut by the shield can be effectively treated, and can recycle slurry, the mode of the slurry treatment system is mainly integrated modular products, the slurry treatment system is closed, and the wastewater reaches the discharge standard.
Description
Technical Field
The utility model relates to a subway tunnel construction technology especially relates to a shield constructs quick-witted mud-water separation system integrates.
Background
The shield method is one of the main construction methods of subway tunnel engineering, and the slurry balance shield is widely applied in the world due to the advantages of strong adaptability to different soil layers, continuous soil discharge, quick construction progress, convenience for automatic management and the like. If a large amount of waste slurry generated along with shield construction is not properly treated, not only resource waste and shield cost increase are caused, but also the surrounding ecological environment is endangered.
The traditional slurry shield slurry-water separation system needs a large field and is difficult to meet the requirements of urban sewage discharge standards.
SUMMERY OF THE UTILITY MODEL
Based on the problem that prior art exists, the utility model aims at providing a shield constructs quick-witted mud-water separation system integrates, carry out the muddy water that the shield constructs the cutting soil sand formation and carry out the granule separation and handle the back, go into the adjustment tank with retrieving the mud pump again, waste water discharge to reach standard.
The utility model aims at realizing through the following technical scheme:
the utility model discloses an integrated shield tunneling machine mud-water separation system, which comprises a vibrating screen system, a cyclone separation system, a centrifugal separation system and a slurry adjusting system;
the vibrating screen system comprises three layers of vibrating screens, a slurry outlet of the shield is connected above each vibrating screen, and a slurry particle feed opening at the lower part of each vibrating screen is connected with the sedimentation tank;
the cyclone separation system comprises two stages of cyclones, namely a desanding cyclone and a desilting cyclone, and a silt outlet of the sedimentation tank is sequentially connected with the desanding cyclone, a transition silt water tank and the desilting cyclone;
the centrifugal separation system comprises a centrifugal machine, mud and sand outlets of the desanding cyclone and the desilting cyclone are connected with the centrifugal machine, and a slurry outlet of the centrifugal machine is connected with the sedimentation tank;
a slurry outlet of the desilting cyclone and a slurry outlet of the sedimentation tank are connected with the slurry adjusting system, and an outlet pipe of the slurry adjusting system is connected to a slurry recycling port of the shield;
and a gravel outlet above the vibrating screen and a gravel outlet at the lower part of the centrifugal machine are respectively connected with the earthwork vehicle.
By the foregoing the utility model provides a technical scheme can see out, the embodiment of the utility model provides an integrated compact high efficiency integrates shield constructs quick-witted mud-water separation system can adopt "screening-degritting-desilting-centrifugation" processing technology flow, can guarantee that the shield constructs the contaminated soil that the cutting got off and can reach effective processing, the separation is greater than 0.074mm particle diameter mud granule with the processing, be less than 0.020mm particle diameter within range mud thick liquid and carry out recycle, mud-water treatment system's mode uses integrated modularization product as the owner, use the sedimentation tank as assisting. The mud after the sealing treatment meets the requirement of recycling, and the waste water meets the discharge standard.
Drawings
Fig. 1 is a top view of an integrated shield tunneling machine mud-water separation system provided by an embodiment of the present invention;
FIG. 2 is a distribution diagram of a desliming cyclone system in accordance with an embodiment of the present invention;
FIG. 3 is a flow chart of the mud-water separation process according to the embodiment of the present invention.
The reference numbers in the figures illustrate:
1-a vibrating screen system; 2-desanding cyclone; 3-a mud removal swirler; 4-centrifugal separation system.
Detailed Description
Embodiments of the present invention will be described in further detail below. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
The utility model discloses a shield constructs quick-witted mud-water separation system integrates, the concrete implementation mode of its preferred is:
comprises a vibrating screen system, a cyclone separation system, a centrifugal separation system and a slurry adjusting system;
the vibrating screen system comprises three layers of vibrating screens, a slurry outlet of the shield is connected above each vibrating screen, and a slurry particle feed opening at the lower part of each vibrating screen is connected with the sedimentation tank;
the cyclone separation system comprises two stages of cyclones, namely a desanding cyclone and a desilting cyclone, and a silt outlet of the sedimentation tank is sequentially connected with the desanding cyclone, a transition silt water tank and the desilting cyclone;
the centrifugal separation system comprises a centrifugal machine, mud and sand outlets of the desanding cyclone and the desilting cyclone are connected with the centrifugal machine, and a slurry outlet of the centrifugal machine is connected with the sedimentation tank;
a slurry outlet of the desilting cyclone and a slurry outlet of the sedimentation tank are connected with the slurry adjusting system, and an outlet pipe of the slurry adjusting system is connected to a slurry recycling port of the shield;
and a gravel outlet above the vibrating screen and a gravel outlet at the lower part of the centrifugal machine are respectively connected with the earthwork vehicle.
The diameters of the sieve pores of the three layers of vibrating sieves are respectively 10mm, 6mm and 3 mm.
The desanding cyclone and the desilting cyclone are both static cyclones and mainly formed by connecting a cylinder and a conical cylinder, and are provided with an overflow pipe, an underflow pipe and a feeding pipe;
the diameter of the desander in the desanding cyclone is 150-300 mm, and the diameter of the desilter in the desilting cyclone is 100-125 mm.
The centrifugal separation system mainly comprises a horizontal screw centrifuge, and specifically comprises a rotary drum, a screw, a differential system, a liquid level baffle, a driving system and a control system.
The slurry adjusting system comprises an adjusting tank, a surplus tank, an adjusting tank stirrer, a surplus tank stirrer, an adjusting pump, a surplus pump, a density pump, a slurry feeding pump, a fluid infusion pump, a distribution valve, a liquid level meter, a stirring blade, a differential pressure type densimeter and water adding equipment.
The specific embodiment is as follows:
as shown in fig. 1 to 3, the vibrating screen system is used for primary separation, and mainly pre-treats the muddy water to remove water and coarse particles such as lumps and blocks. And separating coarse particles by adopting three layers of vibrating screens, wherein the particles with the particle size of less than 10mm enter the second layer through the first layer of vibrating screen, the particles with the particle size of less than 6mm enter the third layer of vibrating screen after vibration, the slurry particles with the particle size of less than or equal to 3mm are discharged into a sedimentation tank, and all oversize materials of the vibrating screens are discharged to a soil piling site.
The cyclone separation system has the main functions of refining medium and fine particle size separated by the vibrating screen again, gradually reducing the size of the size, adopting two stages of cyclones for treatment, namely a desanding cyclone and a desilting cyclone, adopting a static cyclone, mainly formed by connecting a cylinder and a conical cylinder, and comprising an overflow pipe, a bottom flow pipe, a feeding pipe and other main parts.
The diameter of a mud remover in the mud removing cyclone is 150-300 mm, and the treatment capacity of a single cyclone is 20-120 m when the working pressure is 0.2MPa3/h。
The cyclone with the diameter of 100-125 mm in the mud removal cyclone is called as the mud removal device, and when the working pressure is 0.2MPa, the treatment capacity of a single cyclone is 10-15 m3/h。
The centrifugal separation system mainly comprises a horizontal screw centrifuge, and specifically comprises a rotary drum, a screw, a differential system, a liquid level baffle, a driving system, a control system and the like. The solid-liquid separation is realized by utilizing the density difference of the solid phase and the liquid phase and accelerating the settling velocity of solid phase particles under the action of centrifugal force. The specific separation process is that sludge and flocculant liquid medicine are fed into a mixing cavity in a rotary drum through an inlet pipeline, mixed flocculation is carried out (if the sludge is fed with medicine before a sludge pump or fed with medicine after the pump, flocculation reaction is carried out in advance), the sludge is accelerated inside a rotor and forms a cylindrical liquid ring layer (liquid ring area) due to high-speed rotation and friction resistance of the rotor (a spiral and the rotary drum), solid particles with large specific gravity are settled on the inner wall of the rotary drum to form a mud layer (solid ring layer) under the action of centrifugal force, then a solid phase is pushed to the conical end of the rotary drum by utilizing the relative speed difference of the spiral and the rotary drum, the mud residue is dehydrated and dried after the liquid level is pushed out (a shore area or a drying area), the mud residue is pushed to a residue discharge port to be discharged, and supernatant is discharged from the large end of the rotary drum to realize solid-liquid separation.
The slurry adjusting system comprises an adjusting tank, a surplus tank, an adjusting tank stirrer, a surplus tank stirrer, an adjusting pump, a surplus pump, a density pump, a slurry feeding pump, a slurry supplementing pump, a distribution valve and water adding equipment, wherein the adjusting tank adjusts new and old slurry, the surplus tank stores the new and old slurry, the new and old slurry is stirred by the stirrer respectively, the density pump carries out density detection, the slurry which is adjusted is fed to a shield machine by the slurry feeding pump, and when the shield machine is in a tunneling stopping mode to carry out duct piece assembly, the slurry supplementing pump carries out circulating fluid supplementing for ensuring the soil pressure balance of the front face of a cutter head.
The adjusting tank and the residual tank are respectively composed of a speed-reducing stirrer, a liquid level meter, a stirring blade, a differential pressure type densimeter, a density pump, a circulating pump and corresponding pumps (an adjusting pump and a residual pump). The slurry in the tank is stirred by the stirrer, the technical index of the adjusted slurry is detected by the densimeter, in order to prevent the slurry in the tank from overflowing and being empty, the height level meter is arranged to control the slurry level, the adjusting tank and the residual tank are communicated by the overflow pipe to ensure that the slurry system has enough slurry delivery amount, and when the slurry indexes in the two tanks cannot meet the technical requirements, the adjusting pump and the residual pump are mutually supplemented to adjust again. The adjusting tank subsystem has the functions of stirring and adjusting new and old slurry and also has the function of storing the slurry. After the recycled slurry is repeatedly applied by the shield machine, the specific gravity and viscosity index of the slurry can be continuously changed, and the technical index of the slurry needs to be adjusted again by using the new slurry distributed by the new slurry subsystem for the mixed slurry formed by cutting the soil and sand.
According to the mud-water separation and treatment system mode, a main circulation system device control and adjustment subsystem and a water taking subsystem are controlled; the automatic control system is characterized in that central automatic/central manual control is preferably adopted, a slurry discarding subsystem is set to automatically operate the central control to manually start and stop, and in order to consider the engineering cost, the water adding and slurry adding control in the treatment process adopts manual judgment operation of operators according to the slurry proportioning requirement; the pulping subsystem is designed to manually control the ingredient formula on site and automatically pulp.
The utility model has the advantages as follows:
by adopting the processing process of screening, desanding, desliming and centrifuging, the polluted soil cut by the shield can be effectively treated, the slurry particles with the particle size of more than 0.074mm are separated and treated, the slurry in the particle size range of less than 0.020mm is recycled, and the mode of the slurry treatment system is mainly integrated modular products and is assisted by a sedimentation tank. The treated slurry meets the requirement of recycling, and the wastewater meets the discharge standard.
The utility model provides a shield constructs quick-witted mud-water separation system integrates adopts the physical method to carry out the serialization processing to shield mud, can control the liquid level, the concentration etc. of mud according to the content of pollutant, granule particle diameter, moisture content in the soil, can optimize each technological parameter to reach better separation effect, realize the reutilization of resource, reduce and produce secondary pollution and harm to the environment.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. An integrated shield tunneling machine mud-water separation system is characterized by comprising a vibrating screen system, a cyclone separation system, a centrifugal separation system and a slurry adjusting system;
the vibrating screen system comprises three layers of vibrating screens, a slurry outlet of the shield is connected above each vibrating screen, and a slurry particle feed opening at the lower part of each vibrating screen is connected with the sedimentation tank;
the cyclone separation system comprises two stages of cyclones, namely a desanding cyclone and a desilting cyclone, and a silt outlet of the sedimentation tank is sequentially connected with the desanding cyclone, a transition silt water tank and the desilting cyclone;
the centrifugal separation system comprises a centrifugal machine, mud and sand outlets of the desanding cyclone and the desilting cyclone are connected with the centrifugal machine, and a slurry outlet of the centrifugal machine is connected with the sedimentation tank;
a slurry outlet of the desilting cyclone and a slurry outlet of the sedimentation tank are connected with the slurry adjusting system, and an outlet pipe of the slurry adjusting system is connected to a slurry recycling port of the shield;
and a gravel outlet above the vibrating screen and a gravel outlet at the lower part of the centrifugal machine are respectively connected with the earthwork vehicle.
2. The integrated shield tunneling machine mud-water separation system of claim 1, wherein the mesh diameters of the three layers of vibrating screens are 10mm, 6mm and 3mm respectively.
3. The integrated shield tunneling machine mud-water separation system of claim 1, wherein the desanding cyclone and the desilting cyclone are both static cyclones and mainly formed by connecting a cylinder and a conical cylinder, and are provided with an overflow pipe, an underflow pipe and a feed pipe.
4. The integrated shield tunneling machine mud-water separation system of claim 3, wherein the diameter of a sand remover in the sand removing cyclone is 150-300 mm, and the diameter of a mud remover in the mud removing cyclone is 100-125 mm.
5. The integrated shield tunneling machine mud-water separation system of claim 1, wherein the centrifugal separation system mainly comprises a horizontal screw centrifuge, and specifically comprises a rotary drum, a screw, a differential system, a liquid level baffle, a driving system and a control system.
6. The integrated shield tunneling machine mud-water separation system of claim 1, wherein the slurry adjusting system comprises an adjusting tank, a surplus tank, an adjusting tank stirrer, a surplus tank stirrer, an adjusting pump, a surplus pump, a density pump, a slurry feeding pump, a fluid supplementing pump, a distribution valve, a liquid level meter, a stirring blade, a differential pressure type densimeter and a water adding device.
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| CN202022843484.XU CN214270628U (en) | 2020-12-01 | 2020-12-01 | Integrated shield tunneling machine mud-water separation system |
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| CN202022843484.XU CN214270628U (en) | 2020-12-01 | 2020-12-01 | Integrated shield tunneling machine mud-water separation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390485A (en) * | 2020-12-01 | 2021-02-23 | 北京石油化工学院 | Integrated shield tunneling machine mud-water separation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390485A (en) * | 2020-12-01 | 2021-02-23 | 北京石油化工学院 | Integrated shield tunneling machine mud-water separation system |
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