CN114260106B - Classification treatment system for earth pressure balance shield dregs - Google Patents
Classification treatment system for earth pressure balance shield dregs Download PDFInfo
- Publication number
- CN114260106B CN114260106B CN202111569262.6A CN202111569262A CN114260106B CN 114260106 B CN114260106 B CN 114260106B CN 202111569262 A CN202111569262 A CN 202111569262A CN 114260106 B CN114260106 B CN 114260106B
- Authority
- CN
- China
- Prior art keywords
- shield
- mud
- belt conveyor
- dryer
- screw type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002893 slag Substances 0.000 claims abstract description 58
- 239000002002 slurry Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000001035 drying Methods 0.000 claims abstract description 29
- 239000002689 soil Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 20
- 230000018044 dehydration Effects 0.000 claims abstract description 18
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 239000004575 stone Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 17
- 230000005641 tunneling Effects 0.000 abstract description 10
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000012216 screening Methods 0.000 abstract description 3
- 208000005156 Dehydration Diseases 0.000 description 14
- 238000010276 construction Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 108010066057 cabin-1 Proteins 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Abstract
The invention discloses a grading treatment system for earth pressure balance shield dregs, which comprises a screw conveyor, a vibrating screen, a horizontal screw type centrifuge, a lamp tube dryer and a continuous belt conveyor, wherein the screw conveyor, the vibrating screen, the horizontal screw type centrifuge, the lamp tube dryer and the continuous belt conveyor are arranged in a shield machine cabin; the spiral conveyor is used for conveying the shield slag to the vibrating screen; the vibrating screen is used for separating dregs and conveying separated slurry into the horizontal screw type centrifugal machine; the horizontal screw type centrifuge carries out centrifugal dehydration and separation on the slurry to obtain a mud cake, and the mud cake is sent into a lamp tube dryer; the lamp tube dryer carries out drying treatment on the mud cake and conveys the mud cake to the continuous belt conveyor; and conveying the dried mud cake to the outside of the shield cabin by the continuous belt conveyor. In the scheme, the in-cabin dehydration operation of the shield slag soil can be completed through multistage modularized screening and dehydration in the shield machine, so that the tunneling and slag discharging efficiency of the shield is greatly improved; the method can realize solid-liquid separation of sand, soil and water in the shield slag soil, realize recycling of water removal and improve the rear end value of the shield slag soil.
Description
Technical Field
The invention relates to the technical field of tunnel engineering, in particular to a grading treatment system for earth pressure balance shield dregs.
Background
The earth pressure balance shield construction method is one of the main methods of urban subway section tunnel construction, and is particularly widely applied to sandy pebble or sand gravel areas. The slurry and broken stone generated by tunnel excavation are mixed to form a large amount of shield waste residue soil. As modifier such as bentonite and foaming agent are added in the stratum water content and shield tunneling process, the dregs generated in the shield construction process are in a plastic flowing state (the water content is 40% -60%).
Various methods for dehydrating and separating shield slag soil exist, and the dehydrated slag soil can meet the requirement of no scattering and leakage when transported outside a work area. But the method for solving the problem of low dehydration treatment efficiency in the shield tunneling process is quite limited, and the dehydration efficiency can only meet 30% -40% of the tunneling speed of the shield machine, so that the tunneling speed of the shield construction is severely restricted. The construction efficiency and the construction progress of the shield tunneling machine can be greatly reduced, and the urban subway construction process is further affected. For example: 1. the transportation of the water-containing muck is generally that a muck hopper truck to be fully loaded with muck moves to a turnout, and another muck truck in an empty bin is started to a muck outlet for further propulsion, and the process takes at least 10-20 minutes. 2. Not only inconvenient transportation but also low discharge efficiency can occur during the discharge and transportation in the dregs tunnel; and sediment is easy to leak and dust is easy to disperse, so that the inside of the shield machine is polluted, and the normal operation of the device is easy to influence.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a grading treatment system for the earth pressure balance shield muck, which solves the problems that the construction efficiency and the construction progress of a shield machine are reduced and the construction progress of urban subways are influenced due to low dehydration efficiency of the existing muck dehydration equipment.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the grading treatment system for the earth pressure balance shield dregs comprises a screw conveyor, a vibrating screen, a horizontal screw type centrifuge, a lamp tube dryer and a continuous belt conveyor which are arranged in a shield machine cabin;
the spiral conveyor is used for conveying the shield slag soil from the shield cutter head to the vibrating screen;
the vibrating screen is used for vibrating and separating soil, sand and stone, sending the sand and stone obtained after separation into a continuous belt conveyor, and sending the separated slurry into a horizontal screw type centrifuge;
the horizontal screw type centrifugal machine is used for carrying out centrifugal dehydration and separation on the slurry to obtain a mud cake, and sending the obtained mud cake into the lamp tube dryer;
the lamp tube dryer carries out drying treatment on the mud cake and conveys the dried mud cake to the continuous belt conveyor; and conveying the dried mud cake to the outside of the shield cabin by the continuous belt conveyor.
Further, an input port and an output port are arranged on the screw conveyor, the input port is used for being communicated with a soil bin provided with a shield cutter head, the screw conveyor is obliquely arranged, and the height of the output port is higher than that of the input port; a vibrating screen is arranged below the output port.
Further, the vibrating screen comprises a hopper with a funnel structure, the hopper is positioned below the output port, and a horizontal screw type centrifuge and a continuous belt conveyor are arranged on one side of the hopper; the hopper is obliquely arranged towards the horizontal screw type centrifugal machine and the continuous belt conveyor, and the inclination angle is 20-30 degrees; one side of the top of the hopper, which is close to the direction of the horizontal screw type centrifugal machine and the continuous belt conveyor, is provided with a hopper discharge hole for discharging sand and stones in the dregs, and the bottom of the hopper is provided with a mud outlet for discharging mud, and the mud outlet is communicated with the horizontal screw type centrifugal machine.
Further, the horizontal screw type centrifuge comprises a centrifuge shell with a hollow cylindrical structure, wherein one end of the centrifuge shell is provided with a slurry feed port and a centrifugal liquid discharge port which are communicated with a slurry output port, and the other end of the centrifuge shell is provided with a centrifugal slag hole;
a rotary drum is arranged in the centrifugal machine shell, the rotary drum is of a hollow columnar structure with an opening at one end, a plurality of filtering holes are formed in the circumferential outer wall of the rotary drum, and rotary spiral blades are arranged in the rotary drum;
the slurry feed inlet is communicated with the middle part of the rotary drum, the centrifugal liquid discharge port and the centrifugal slag outlet are both positioned outside the rotary drum, and the centrifugal slag outlet is used for being communicated with the lamp tube dryer.
Further, a weir plate for adjusting the depth of the liquid pool is arranged inside the centrifuge shell. The weir plate can adjust the depth of the liquid pool and the length of the dewatering area, and change the water content of the residue mud finally separated from the horizontal decanter centrifuge and the grain size range of mud cakes.
Further, the bottom of the mud delivery outlet is provided with a collecting tank, the bottom of the collecting tank is provided with a mud pump, and the mud pump pumps mud in the collecting tank into the mud feed inlet. The slurry pump is provided to avoid uneven feeding caused by variation of feeding pressure. By adopting the method of quantitative feeding and conveying of the slurry pump, a large amount of slurry can be prevented from suddenly entering the horizontal decanter centrifuge, so that the feed pipe is twisted off, the inner cavity of the rotary drum is blocked, and the vibration of the main transmission bearing is increased, and if the horizontal decanter centrifuge is damaged for a long time.
Further, the lamp tube dryer comprises a dryer shell, wherein the dryer shell is provided with a stirring dewatering tank and a sealing area which are mutually independent, a rotating shaft is arranged in the stirring dewatering tank, stirring blades with spiral structures are arranged on the rotating shaft, and a plurality of circles of drying lamp tubes are annularly arranged on the inner wall of the stirring dewatering tank; the two ends of the dryer shell are respectively provided with a drying slag inlet and a drying slag outlet which are communicated with the inside of the dryer shell; the drying slag inlet is communicated with the centrifugal slag outlet; the dried dregs are discharged to a continuous belt conveyor through a drying slag outlet;
the sealing area is provided with a driving device for driving the rotating shaft to rotate around the axis of the sealing area.
Further, an insulation layer is arranged in the dryer shell; a steam condenser communicated with the inside of the dryer shell is arranged on the circumferential outer wall of the dryer shell, and a water collecting pipe communicated with the screw conveyor is arranged on the steam condenser; the driving device is a rotating motor; the outside of the dryer shell is provided with a temperature control device for controlling the heating quantity of the drying lamp tube.
The basic principle of the invention is as follows: firstly, conveying the dregs from the shield cutter head to a vibrating screen by a screw conveyor, vibrating and separating the dregs, namely soil, sand and stones by the vibrating screen, and enabling fine-grained dregs slurry with the diameter of 0-2mm to enter a collecting tank by utilizing vibration extrusion, scouring and gravitational potential energy. When the vibrating screen is used, high-pressure clean water is adopted to flush the dregs, so that the blockage of the dregs on the vibrating screen can be prevented, the clay adhered to sand can be effectively reduced, and better conditions are provided for recycling the sand. Separating stone blocks and gravel with the particle size of more than 2mm, discharging the stone blocks and gravel onto a transfer belt conveyor from a hopper discharge port, and transporting the stone blocks and gravel out of a tunnel, wherein the stone blocks and the gravel can be used as building material aggregates according to performance requirements; the material head is obliquely arranged and connected with the material transferring belt conveyor, so that the aggregate is conveniently collected and transferred; the upper part of the hopper can be equidistantly provided with a high-pressure water spray gun for crushing and flushing the separated earth and stone blocks; mud guards are arranged around the top of the hopper to prevent mud from splashing and polluting equipment during flushing; the slurry is output into the horizontal screw type centrifuge through a slurry output port at the bottom of the hopper;
the slurry flows into a slurry pump from a collecting tank to be pressurized and quantitatively pumped into a horizontal screw type centrifuge, the slurry is subjected to solid-liquid separation under the action of huge centrifugal force generated by high-speed rotation, solid-phase particles with larger specific gravity are deposited on the inner wall of a rotary drum, and solid-phase particles (mud cakes) deposited on the inner wall of the rotary drum are scraped off by a spiral blade and pushed out of a centrifugal slag hole; the liquid phase after centrifugal separation flows out of the rotary drum along the liquid outlet, and is discharged into a sewage pipe network through the centrifugal liquid outlet, and part of the liquid phase is recycled for construction operation water.
The mud is dehydrated by a horizontal screw type centrifuge to form mud cakes with the grain diameter of 0.005mm-2mm and the water content of 15% -25%, and enters a lamp tube dryer through a centrifugal slag hole, and a field engineer can adjust the temperature (namely the working quantity of the lamp tube) according to the water content of the mud cakes to dry the mud cakes. The lamp tube drives the rotating shaft to rotate through the motor, so that the stirring blades rotate, and the conveyed mud cakes are extruded by the follow-up mud cakes to be conveyed backwards and dried. Discharging the dried mud cake from a drying slag outlet; the mud cake is directly discharged by the continuous slag discharge belt conveyor, the discharged mud cake can be recycled according to characteristics, for example, the mud cake is used for manufacturing clay bricks, roadbed cushion filling and the like, the steam condenser cools and condenses the water vapor in the dryer shell, and the condensed clear water is conveyed to the screw conveyor or the vibrating screen through the water collecting pipe.
The beneficial effects of the invention are as follows: 1. in the scheme, the spiral conveyor, the vibrating screen, the horizontal spiral centrifugal machine, the lamp tube dryer and the continuous belt conveyor in the shield machine cabin can complete the dehydration operation of the shield dregs in the cabin through multistage modularized screening and dehydration in the shield machine, so that the tunneling and deslagging efficiency of the shield is greatly improved; the solid-liquid separation of sand, soil and water in the shield slag soil can be realized, the recycling of the dehydrated water is realized, and the rear end value of the waste slag is improved; the method avoids the possibility of polluting the inside of the shield machine when the shield muck is discharged, and reduces the total risk and cost in the shield muck treatment process.
2. The horizontal spiral centrifugal machine in the scheme has a compact structure, is suitable for installation and operation in a shield machine cabin, can realize closed dehydration operation in a narrow space of the shield machine, and avoids slag soil and slurry pollution. In addition, the filter cloth and the filter screen are not needed in the process, so that the time consumption for replacing the filter cloth and the filter screen is avoided; the horizontal spiral centrifugal machine can adjust a weir plate of a centrifugal mother liquor outlet, and adjust the depth of a liquid pool and the length of a dewatering area so as to adapt to the slag soil dewatering work of different stratum in tunneling; meanwhile, the horizontal screw type centrifugal machine lengthens the straight rotary drum, increases the sedimentation time of materials, and simultaneously increases liquid phase diversion holes on the screw, thereby greatly increasing the dehydration capability of the centrifugal machine.
3. The temperature control device in the scheme is connected with the drying lamp tube, and the number of the heating lamp tubes can be controlled according to the water content of the materials. In addition, compared with the traditional hot air dryer, slag soil dust emission is easy to cause when the hot air dryer is used for drying, the influence of the lamp tube dryer on the internal environment of the shield machine is very small, and the dust is prevented from influencing the working environment in the cabin of the shield machine.
Drawings
FIG. 1 is a schematic diagram of a hierarchical treatment system for earth pressure balance shield muck.
Fig. 2 is a schematic structural view of a vibrating screen.
Fig. 3 is a schematic diagram of the structure of a decanter centrifuge.
Fig. 4 is a schematic structural view of a lamp dryer.
FIG. 5 is a flow chart of dewatering and deslagging of the soil pressure balance shield muck classification system.
1, a shield cabin; 2. a screw conveyor; 201. an input port; 202. an output port; 3. a vibrating screen; 301. a hopper; 302. a discharge hole of the hopper; 303. a mud outlet; 4. horizontal screw type centrifuge; 401. a centrifuge housing; 402. a slurry feed port; 403. centrifuging the slag outlet; 404. a centrifugal liquid discharge port; 405. a rotating drum; 406. a helical blade; 407. a weir plate; 5. a lamp tube dryer; 501. a dryer housing; 502. stirring a dewatering tank; 503. a sealing region; 504. a rotating shaft; 505. stirring blades; 506. drying the lamp tube; 507. a slag inlet for drying; 508. drying the slag outlet; 509. a driving device; 510. a heat preservation layer; 511. a steam condenser; 6. a continuous belt conveyor; 7. a collection tank; 8. and (3) a slurry pump.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
As shown in fig. 1 to 5, the invention provides a grading treatment system for earth pressure balance shield dregs, which comprises a screw conveyor 2, a vibrating screen 3, a horizontal screw type centrifuge 4, a lamp tube dryer 5 and a continuous belt conveyor 6, wherein the screw conveyor 2, the vibrating screen 3, the horizontal screw type centrifuge 4, the lamp tube dryer 5 and the continuous belt conveyor 6 are arranged in a shield cabin 1; the screw conveyor 2 is used for conveying shield slag soil from the shield cutterhead to the vibrating screen 3; the vibrating screen 3 is used for vibrating and separating soil, sand and stone from the dregs, sending the sand and stone obtained after separation into the continuous belt conveyor 6, and sending the separated slurry into the horizontal screw type centrifuge 4; the horizontal screw type centrifuge 4 is used for carrying out centrifugal dehydration and separation on the slurry to obtain a mud cake and sending the obtained mud cake into the lamp tube dryer 5;
the lamp tube dryer 5 carries out drying treatment on the mud cake and conveys the dried mud cake to the continuous belt conveyor 6; the continuous belt conveyor 6 conveys the dried mud cake to the outside of the shield nacelle 1.
Preferably, but not limited to, the screw conveyor 2 is provided with an input port 201 and an output port 202, the input port 201 is used for communicating with a soil bin provided with a shield cutter head, the screw conveyor 2 is obliquely arranged, and the output port 202 is higher than the input port 201; a vibrating screen 3 is provided below the output port 202. The inclined arrangement of the screw conveyor 2 may facilitate the arrangement of the vibrating screen 3.
The vibrating screen 3 comprises a hopper 301 with a funnel structure, the hopper 301 is positioned below the output port 202, and a horizontal screw type centrifugal machine 4 and a continuous belt conveyor 6 are arranged on one side of the hopper 301; the hopper 301 is obliquely arranged towards the horizontal screw type centrifugal machine 4 and the continuous belt conveyor 6, the inclination angle is 20-30 degrees, and the hopper 301 is convenient for discharging sand and stones in the dregs after vibrating; a hopper discharge hole 302 for discharging sand and stones in the dregs is formed in one side, close to the horizontal decanter centrifuge 4 and the continuous belt conveyor 6, of the top of the hopper 301, a mud outlet 303 for discharging mud is formed in the bottom of the hopper 301, and the mud outlet 303 is communicated with the horizontal decanter centrifuge 4.
The vibrating screen 3 has the following working principle: the vibrating screen 3 performs the vibratory separation of the earth, the sand and the stone, and the slurry of the fine-grained slag with the diameter of 0-2mm is vibrated into the collecting tank 7 by utilizing the vibration extrusion, the scouring and the gravitational potential energy. The high-pressure clean water is adopted to flush the dregs in the time sharing of the vibrating screen 3, so that not only can the blockage of the dregs on the vibrating screen 3 be prevented, but also the clay adhered to sand can be effectively reduced, and better conditions are provided for the reutilization of sand. The stones and gravel with the particle size larger than 2mm are separated, discharged to a transfer belt conveyor from a hopper discharge hole 302 and transported out of a tunnel, and can be used as building material aggregate according to performance requirements; the material head is obliquely arranged and connected with the material transferring belt conveyor, so that the aggregate is conveniently collected and transferred; a high-pressure water spray gun can be equidistantly arranged above the hopper 301 and is used for crushing and flushing the separated earth and stone blocks; mud guards are arranged around the top of the hopper 301 to prevent mud from splashing and polluting equipment during flushing; the slurry is output into the decanter centrifuge 4 through a slurry output port 303 at the bottom of the hopper 301.
The bottom of the slurry outlet 303 is provided with a collecting tank 7, the bottom of the collecting tank 7 is provided with a slurry pump 8, and the slurry pump 8 pumps the slurry in the collecting tank 7 into a slurry inlet 402. The slurry pump 8 is provided to avoid uneven feeding caused by variation of the feeding pressure. By adopting the quantitative feeding method of the slurry pump 8, a large amount of slurry can be prevented from suddenly entering the horizontal decanter centrifuge 4, so that the feed pipe is twisted off, the inner cavity of the rotary drum 405 is blocked, and the vibration of the main transmission bearing is increased, and if the horizontal decanter centrifuge 4 is damaged for a long time.
The horizontal screw type centrifuge 4 comprises a centrifuge shell 401 with a hollow cylindrical structure, wherein one end of the centrifuge shell 401 is provided with a slurry feed port 402 and a centrifugal liquid discharge port 404 which are used for being communicated with the slurry output port 303, and the other end is provided with a centrifugal slag hole 403; a rotary drum 405 is arranged in the centrifuge shell 401, the drum 405 is of a hollow columnar structure with an opening at one end, a plurality of filtering holes are formed in the circumferential outer wall of the drum 405, and a rotary helical blade 406 is arranged in the drum 405; the slurry feed port 402 is communicated with the middle of the rotary drum 405, the centrifugal liquid discharge port 404 and the centrifugal slag outlet 403 are both positioned outside the rotary drum 405, and the centrifugal slag outlet 403 is used for communicating with the lamp dryer 5.
The working principle of the horizontal screw type centrifugal machine 4 is as follows: the slurry flows into a slurry pump 8 from a collecting tank 7 to be pressurized and quantitatively pumped into a horizontal screw type centrifugal machine 4, the slurry is subjected to solid-liquid separation under the action of huge centrifugal force generated by high-speed rotation, solid-phase particles with larger specific gravity are deposited on the inner wall of a rotary drum 405, and solid-phase particles (mud cakes) deposited on the inner wall of the rotary drum 405 are scraped off by a spiral blade 406 and pushed out of a centrifugal slag hole 403; the centrifugally separated liquid phase flows out of the rotary drum 405 along the liquid outlet, and is discharged into a sewage pipe network through the centrifugal liquid outlet 404, and is partially recycled for construction operation water. The mud is dehydrated by a horizontal screw type centrifuge 4 to form mud cakes with the grain diameter of 0.005mm-2mm and the water content of 15% -25%, and the mud cakes enter a lamp tube dryer 5 through a centrifugal slag outlet 403. The horizontal screw type centrifugal machine 4 is compact in structure, suitable for installation and operation in the shield cabin 1, capable of realizing closed dehydration operation in a narrow space of the shield machine and avoiding slag mud pollution. In addition, the filter cloth and the filter screen are not needed in the process, so that the time consumption for replacing the filter cloth and the filter screen is avoided; the horizontal screw type centrifuge 4 can adjust a weir plate 407 of a centrifugal mother liquor outlet, and adjust the depth of a liquid pool and the length of a dewatering area so as to adapt to the slag soil dewatering work of different stratum in tunneling; meanwhile, the horizontal screw type centrifugal machine 4 lengthens the straight rotary drum 405, so that the sedimentation time of materials is increased, and meanwhile, liquid phase diversion holes are added on the screw, so that the dehydration capacity of the centrifugal machine can be greatly increased.
The lamp tube dryer 5 comprises a dryer shell 501, wherein the dryer shell 501 is provided with a stirring dewatering tank 502 and a sealing area 503 which are mutually independent, a rotating shaft 504 is arranged in the stirring dewatering tank 502, stirring blades 505 with spiral structures are arranged on the rotating shaft 504, and a plurality of circles of drying lamp tubes 506 are annularly arranged on the inner wall of the stirring dewatering tank 502; the two ends of the dryer shell 501 are respectively provided with a drying slag inlet 507 and a drying slag outlet 508 which are communicated with the inside of the dryer shell; the drying slag inlet 507 is used for communicating with the centrifugal slag outlet 403; the dried dregs are discharged to the continuous belt conveyor 6 through a drying slag outlet 508; the sealing area 503 is provided with a drive means 509 for driving the rotation shaft 504 around its own axis. Further, an insulation layer 510 is provided in the dryer housing 501; a steam condenser 511 is provided on the circumferential outer wall of the dryer housing 501 in communication with the inside thereof, and a water collecting pipe is provided on the steam condenser 511 for communication with the screw conveyor 2; the driving device 509 is a rotary motor; the dryer housing 501 is provided externally with a temperature control device for controlling the amount of heat generated by the drying light 506.
The field engineer can adjust the temperature (namely the working quantity of the lamp tubes) according to the water content of the mud cake to dry the mud cake. The lamp tube drives the rotating shaft 504 to rotate through the motor, so that the stirring blade 505 rotates, and the conveyed mud cake is extruded by the follow-up mud cake to be conveyed backwards and dried. Discharging the dried mud cake from a drying slag outlet 508; the mud cake is directly discharged by continuous slag discharge belt conveyor, and the discharged mud cake can be recycled according to characteristics, for example, the mud cake is used for manufacturing clay bricks, roadbed cushion filling and the like, the steam condenser 511 is used for cooling and condensing the steam in the dryer shell 501, and the condensed clear water is conveyed to the screw conveyor 2 or the vibrating screen 3 through the water collecting pipe, so that the aim of saving water resources is fulfilled. Compared with the traditional hot air dryer, the light tube dryer 5 is easy to cause dust and slag, the light tube dryer 5 has little influence on the internal environment of the shield machine, and dust is prevented from influencing the working environment in the shield cabin 1.
In summary, in the scheme, the spiral conveyor 2, the vibrating screen 3, the horizontal spiral centrifugal machine 4, the lamp tube dryer 5 and the continuous belt conveyor 6 in the shield cabin 1 can complete the cabin dehydration operation of shield slag soil through multistage modularized screening and dehydration in the shield machine, so that the tunneling and slag discharging efficiency of the shield is greatly improved; the solid-liquid separation of sand, soil and water in the shield slag soil can be realized, the recycling of the dehydrated water is realized, and the rear end value of the waste slag is improved; the method avoids the possibility of polluting the inside of the shield machine when the shield muck is discharged, and reduces the total risk and cost in the shield muck treatment process.
Claims (3)
1. The grading treatment system for the earth pressure balance shield dregs is characterized by comprising a screw conveyor, a vibrating screen, a horizontal screw type centrifuge, a lamp tube dryer and a continuous belt conveyor which are arranged in a shield machine cabin;
the spiral conveyor is used for conveying shield slag soil from the shield cutter head to the vibrating screen;
the vibrating screen is used for vibrating and separating soil, sand and stone, sending the sand and stone obtained after separation into a continuous belt conveyor, and sending the separated slurry into the horizontal screw type centrifugal machine;
the horizontal screw type centrifugal machine is used for carrying out centrifugal dehydration and separation on the slurry to obtain a mud cake, and sending the obtained mud cake into the lamp tube dryer;
the lamp tube dryer is used for drying the mud cake and conveying the dried mud cake to the continuous belt conveyor; conveying the dried mud cake to the outside of a shield cabin by a continuous belt conveyor;
the horizontal screw type centrifuge comprises a centrifuge shell with a hollow cylindrical structure, wherein one end of the centrifuge shell is provided with a slurry feeding port and a centrifugal liquid discharging port which are communicated with the slurry output port, and the other end of the centrifuge shell is provided with a centrifugal slag outlet;
a rotary drum is arranged in the centrifugal machine shell, the rotary drum is of a hollow columnar structure with an opening at one end, a plurality of filtering holes are formed in the outer wall of the circumference of the rotary drum, and rotary spiral blades are arranged in the rotary drum;
the slurry feeding port is communicated with the middle part of the rotary drum, the centrifugal liquid discharging port and the centrifugal slag outlet are both positioned outside the rotary drum, and the centrifugal slag outlet is used for being communicated with the lamp tube dryer;
a weir plate for adjusting the depth of the liquid pool is arranged in the centrifuge shell;
the bottom of the mud output port is provided with a collecting tank, the bottom of the collecting tank is provided with a mud pump, and the mud pump pumps the mud in the collecting tank into the mud feeding port;
the lamp tube dryer comprises a dryer shell, wherein the dryer shell is provided with a stirring dewatering tank and a sealing area which are mutually independent, a rotating shaft is arranged in the stirring dewatering tank, stirring blades with spiral structures are arranged on the rotating shaft, and a plurality of circles of drying lamp tubes are annularly arranged on the inner wall of the stirring dewatering tank; the two ends of the dryer shell are respectively provided with a drying slag inlet and a drying slag outlet which are communicated with the inside of the dryer shell; the drying slag inlet is used for communicating with the centrifugal slag outlet; the dried dregs are discharged to the continuous belt conveyor through the drying slag outlet; the sealing area is provided with a driving device for driving the rotating shaft to rotate around the axis of the sealing area;
an insulation layer is arranged in the dryer shell; a steam condenser communicated with the inside of the dryer shell is arranged on the circumferential outer wall of the dryer shell, and a water collecting pipe communicated with the screw conveyor is arranged on the steam condenser; the driving device is a rotating motor; the outside of the dryer shell is provided with a temperature control device for controlling the heating quantity of the drying lamp tube.
2. The grading treatment system for the earth pressure balance shield muck, according to claim 1, wherein the screw conveyor is provided with an input port and an output port, the input port is used for being communicated with a soil bin provided with a shield cutter head, the screw conveyor is obliquely arranged, and the height of the output port is higher than that of the input port; the vibrating screen is arranged below the output port.
3. The grading treatment system for the earth pressure balance shield muck according to claim 2, wherein the grading treatment system comprises a plurality of grading treatment units,
the vibrating screen comprises a hopper with a funnel structure, the hopper is positioned below the output port, and one side of the hopper is provided with the horizontal screw type centrifugal machine and the continuous belt conveyor; the hopper is obliquely arranged towards the horizontal screw type centrifugal machine and the continuous belt conveyor, and the inclination angle is 20-30 degrees; the top of the hopper is close to one side of the horizontal screw type centrifugal machine and the direction of the continuous belt conveyor and is provided with a hopper discharge hole for discharging sand and stones in the dregs, the bottom of the hopper is provided with a mud outlet for discharging mud, and the mud outlet is communicated with the horizontal screw type centrifugal machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111569262.6A CN114260106B (en) | 2021-12-21 | 2021-12-21 | Classification treatment system for earth pressure balance shield dregs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111569262.6A CN114260106B (en) | 2021-12-21 | 2021-12-21 | Classification treatment system for earth pressure balance shield dregs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114260106A CN114260106A (en) | 2022-04-01 |
| CN114260106B true CN114260106B (en) | 2024-04-02 |
Family
ID=80828426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111569262.6A Active CN114260106B (en) | 2021-12-21 | 2021-12-21 | Classification treatment system for earth pressure balance shield dregs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114260106B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215536A (en) * | 2021-12-21 | 2022-03-22 | 成理科技(成都)股份有限公司 | Shield tunneling machine with muck drying function and muck drying method thereof |
| CN114772899A (en) * | 2022-04-27 | 2022-07-22 | 成理科技(成都)股份有限公司 | Shield muck treatment device and using method |
| CN116008049B (en) * | 2023-03-30 | 2023-06-06 | 西安石油大学 | Geological sample preprocessing device |
| CN117247213A (en) * | 2023-08-28 | 2023-12-19 | 中铁十四局集团装备有限公司 | Mud sewage recycling device for shield tunneling machine |
| CN116906068B (en) * | 2023-09-13 | 2023-12-01 | 北京市市政四建设工程有限责任公司 | Slag discharging device for tunnel shield construction |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964667A (en) * | 2014-05-27 | 2014-08-06 | 杨仲辉 | Sludge dryer utilizing waste heat |
| CN105350974A (en) * | 2015-11-16 | 2016-02-24 | 中国铁建重工集团有限公司 | Earth pressure balance shield machine |
| CN208294531U (en) * | 2018-06-14 | 2018-12-28 | 中建交通建设集团有限公司 | A kind of slag-tapping system and shield machine |
| CN110219665A (en) * | 2019-07-03 | 2019-09-10 | 江苏格睿特管网工程有限公司 | Dregs pumping engineering method and its system based on earth pressure balance shield machine |
| CN110252778A (en) * | 2019-07-18 | 2019-09-20 | 深圳市洪桦环保科技有限公司 | Shield landwaste recycling and reusing system and method |
| CN110695064A (en) * | 2019-11-12 | 2020-01-17 | 青岛恩普环保设备有限公司 | Shield muck zero-discharge treatment system and method |
| CN112194336A (en) * | 2020-11-17 | 2021-01-08 | 上海良延环保科技发展有限公司 | Sludge dewatering device |
| CN112619283A (en) * | 2020-12-30 | 2021-04-09 | 湖南路佳环保科技有限公司 | Shield muck solid-liquid separation system and separation method thereof |
-
2021
- 2021-12-21 CN CN202111569262.6A patent/CN114260106B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964667A (en) * | 2014-05-27 | 2014-08-06 | 杨仲辉 | Sludge dryer utilizing waste heat |
| CN105350974A (en) * | 2015-11-16 | 2016-02-24 | 中国铁建重工集团有限公司 | Earth pressure balance shield machine |
| CN208294531U (en) * | 2018-06-14 | 2018-12-28 | 中建交通建设集团有限公司 | A kind of slag-tapping system and shield machine |
| CN110219665A (en) * | 2019-07-03 | 2019-09-10 | 江苏格睿特管网工程有限公司 | Dregs pumping engineering method and its system based on earth pressure balance shield machine |
| CN110252778A (en) * | 2019-07-18 | 2019-09-20 | 深圳市洪桦环保科技有限公司 | Shield landwaste recycling and reusing system and method |
| CN110695064A (en) * | 2019-11-12 | 2020-01-17 | 青岛恩普环保设备有限公司 | Shield muck zero-discharge treatment system and method |
| CN112194336A (en) * | 2020-11-17 | 2021-01-08 | 上海良延环保科技发展有限公司 | Sludge dewatering device |
| CN112619283A (en) * | 2020-12-30 | 2021-04-09 | 湖南路佳环保科技有限公司 | Shield muck solid-liquid separation system and separation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114260106A (en) | 2022-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114260106B (en) | Classification treatment system for earth pressure balance shield dregs | |
| CN104265214B (en) | Landing-free automatic recovering and processing device for drill cuttings and waste liquid | |
| CN106890504A (en) | Super fine sand recovery device and sand and water separating system and its handling process | |
| CN210393963U (en) | Mud dehydration processing system | |
| CN106914336A (en) | Fine sand reclaims all-in-one and fine sand recovery processing technique | |
| CN111533399A (en) | Silt solidification construction equipment | |
| CN109174612A (en) | A kind of concrete sandstone separator | |
| CN109909053B (en) | Sand and stone separation cleaning equipment | |
| CN110342774A (en) | A kind of drying method for sludge | |
| CN205228054U (en) | Vacuum drying system | |
| CN213140278U (en) | Environment-friendly screw elevator for conveying granular materials | |
| CN111255470B (en) | Slurry-soil pressure dual-mode shield system and control method | |
| CN206763115U (en) | Fine sand reclaims all-in-one | |
| CN109530100A (en) | A kind of O&M method of closing in type mud centrifugation apparatus | |
| CN2398007Y (en) | Cleaning and recovery equipment for residual concrete | |
| KR100616525B1 (en) | A cleansing device aggregate | |
| CN114535268A (en) | Building residue soil recycling method and recycling system thereof | |
| CN211666719U (en) | Slurry-soil pressure double-mode shield device | |
| CN111636835A (en) | Drilling slag treatment vehicle and drilling slag construction method | |
| KR100462815B1 (en) | sand and gravel a manufacturing process and system | |
| CN206762449U (en) | Super fine sand recovery device and sand and water separating system | |
| CN207079144U (en) | A kind of feedway of sticky sludge | |
| CN206631744U (en) | A kind of feed well of sandstone separator | |
| CN106555402A (en) | A kind of spouting plant and its using method | |
| CN212867469U (en) | Slurry non-landing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |