CN111203315B - Engineering dregs and sand separating system - Google Patents
Engineering dregs and sand separating system Download PDFInfo
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- CN111203315B CN111203315B CN202010143326.5A CN202010143326A CN111203315B CN 111203315 B CN111203315 B CN 111203315B CN 202010143326 A CN202010143326 A CN 202010143326A CN 111203315 B CN111203315 B CN 111203315B
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- 239000004576 sand Substances 0.000 title claims abstract description 208
- 238000000926 separation method Methods 0.000 claims abstract description 275
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 215
- 239000002893 slag Substances 0.000 claims abstract description 140
- 239000010802 sludge Substances 0.000 claims abstract description 101
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- 239000002689 soil Substances 0.000 claims abstract description 67
- 239000000843 powder Substances 0.000 claims abstract description 19
- 238000005406 washing Methods 0.000 claims description 237
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- 238000002844 melting Methods 0.000 claims description 68
- 230000008018 melting Effects 0.000 claims description 52
- 239000004088 foaming agent Substances 0.000 claims description 44
- 238000002156 mixing Methods 0.000 claims description 33
- 238000003860 storage Methods 0.000 claims description 30
- 239000006228 supernatant Substances 0.000 claims description 26
- 229920001131 Pulp (paper) Polymers 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 18
- 238000011010 flushing procedure Methods 0.000 claims description 14
- 239000012535 impurity Substances 0.000 claims description 10
- 239000002518 antifoaming agent Substances 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 9
- 208000005156 Dehydration Diseases 0.000 claims description 7
- 230000018044 dehydration Effects 0.000 claims description 7
- 238000006297 dehydration reaction Methods 0.000 claims description 7
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- 230000033001 locomotion Effects 0.000 claims description 4
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- 229910000278 bentonite Inorganic materials 0.000 description 15
- 239000000440 bentonite Substances 0.000 description 15
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 15
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- 239000013530 defoamer Substances 0.000 description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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- Treatment Of Sludge (AREA)
Abstract
The invention discloses an engineering slag soil and sand and stone separation system, which can recycle sand and stone, fine powder and other substances obtained after sand and stone separation of sand-containing slag soil generated in tunnel shield and river dredging engineering, and the utilization rate of the sand and stone, fine powder and other substances reaches or exceeds 98%, so that the problem that the existing shield slag soil is largely abandoned due to high recycling difficulty or low recycling rate is solved. The separated sand can be used as building material; the separated fine powder can be used as raw materials of enterprises needing fine powder, such as paint, and the like; finally, the superfine powder obtained by dehydrating the sludge can be used in the fields of building backfilling and the like, and the water can be recycled into the system.
Description
Technical Field
The invention relates to the fields of tunnel engineering, river channel dredging engineering and the like, in particular to a sludge and sand separation and recycling treatment of shield slag, river bottom sludge and the like by an engineering slag soil and sand separation system.
Background
In tunnel engineering, the shield method is mostly used at present, and a large amount of shield residue soil is generated in the construction process. Because additives such as bentonite, foam and the like are required to be added in the shield construction process, the recycling and recycling of shield slag soil are difficult; the river and lake in China are numerous, the coastline is long, the sand-containing silt produced in the river dredging engineering is large, and the silt is cured and piled up for a long time, so that the effective recycling treatment can not be achieved. At present, most of treatment of the shield residue soil and river bottom sludge is a discarding method, and the sludge has a plurality of negative effects on the environment for a long time.
The existing treatment technology of the shield muck comprises a muck environment-friendly regeneration treatment technology, and the existing treatment technology of river bottom sludge comprises a composting treatment technology and a solidification treatment technology.
The environment-friendly regeneration treatment technology of the shield muck is to separate and dehydrate the muck, reduce the discharge amount of the waste muck and recycle the sand and stone in the muck. However, the technology has low recycling rate of silt in shield slag soil.
The composting treatment of river bottom sludge is carried out after improving the sludge characteristics by adding humus and the like, so that a composting product is obtained; the solidification treatment is to add a solidification material into the sludge, and the product generated by the reaction of the solidification material and water has ion exchange effect with clay particles, and is adsorbed among the particles to form solidification products, and finally, the solidification products are buried, and the like.
1 shield dregs environment-friendly regeneration treatment technology: (1) the technological process of the technology is complicated, a large amount of equipment is required to be arranged, and the slag slurry can be separated and treated finally through multiple lifting, so that the equipment cost of the technology is high; (2) the technology only reduces one third of the discharge amount of the waste residue soil in a certain engineering application, and fails to solve the problem of abandoned large amount of shield residue soil; (3) the specification of the sand and stone separated by the technology can not meet the existing market demand, and the sand and stone in the shield slag soil can not be fully benefited.
2 river bottom sludge treatment technology
2.1 composting technology: the composting treatment method aims at treating sludge without heavy metals, has limited application range, can not be used on a large scale, and can produce odor when composting is easily affected by weather, and has high cost and composting process.
2.2 curing treatment technique: the solidification treatment method has certain requirements on the water content of the sludge, and the water content of the sludge at the bottom of a common river is higher, so that the sludge needs to be dehydrated. The natural dehydration requires a large area of land and is easily affected by weather, and the mechanical dehydration has low efficiency and is difficult to meet the requirements of river dredging engineering. Meanwhile, the sludge curing cost is high.
Disclosure of Invention
The invention aims to provide an engineering muck and sand separating system, which solves the problem of effectively removing bentonite foaming agents and the like in muck, and sand separated by the prior art cannot meet market demands.
In order to solve the above problems, the present invention provides an engineering slag and sand separating system, comprising:
the slurry melting and lifting system is used for melting slurry of the slag soil containing the foaming agent and the circulating water containing the defoaming agent to obtain suspended slurry containing the foaming agent and having the concentration of 10% -70%, and lifting the suspended slurry after the slurry melting to a next mechanism; or lifting the slag soil containing the foaming agent into a pool, and pulping the lifted slag soil and circulating water containing the defoaming agent to obtain suspended slag slurry containing the foaming agent and having the concentration of 10% -70%, wherein the suspended slag slurry flows into a next mechanism;
The washing and separating system is used as a next mechanism of the chemical lifting system and is provided with a multi-stage washing and separating system, the first-stage washing and separating system is connected with the chemical pulp lifting system through a pipeline, the multi-stage washing and separating system is communicated with the chemical pulp lifting system through a diversion trench, the multi-stage washing and separating system sequentially carries out sand and stone separation on chemical pulp and lifted suspended slag pulp according to the sequence from the large pore diameter of a screen mesh to the small pore diameter of the screen mesh, and corresponding sand and stone separated by the multi-stage washing and separating system are washed at the same time of carrying out sand and stone separation so as to obtain sand and residual slag pulp with different particle diameters and without foaming agents;
the mud-water separation system is communicated with the final-stage washing separation system, and mud-water separation is carried out on the residual slurry obtained after separation to obtain mud cakes and supernatant;
the circulating water pool system is connected with the mud-water separation system, the washing separation system and the slurry-melting lifting system through pipelines, receives supernatant separated by the mud-water separation system, adds water and necessary medicaments such as defoamers into the supernatant to form circulating water, and conveys the circulating water to the slurry-melting lifting system and the washing separation system;
the auxiliary conveying system is provided with a plurality of conveying systems, and the conveying systems are in one-to-one correspondence with the multi-stage washing and separating systems and are used for conveying sand and stones with different particle diameters and mud cakes separated by the multi-stage washing and separating systems and the mud-water separating systems to respective storage areas;
And the PLC electrical control system adopts a PLC and touch screen control mode to perform switch control and/or regulation control on the starting, stopping and/or frequency of each system and each pipeline.
The technical scheme of the invention has the following beneficial technical effects: the utilization rate of substances such as sand and stone, fine powder and the like obtained after sand and stone separation is carried out on sand and stone-containing dregs generated in tunnel shield and river dredging engineering reaches or exceeds 98%, and the problem that the existing shield dregs are abandoned in a large amount due to high recycling difficulty or low recycling rate is solved. The separated sand can be used as building material; the separated fine powder can be used as raw materials of enterprises needing fine powder, such as paint, and the like; finally, the superfine powder obtained by dehydrating the sludge can be used in the fields of building backfilling and the like, and the water can be recycled into the system.
Drawings
FIG. 1 is a process flow and plan layout of an engineering muck-sand separation system of the present invention;
FIG. 2 is a block diagram of the workflow of the lift-before-lift mode of the present invention;
FIG. 3 is a block diagram of the workflow of the lift-after-lift mode of the present invention;
FIG. 4 is a process flow block diagram of the wash separation system of the present invention;
FIG. 5 is a system layout of the wash separation system of the present invention;
FIG. 6 is a workflow box diagram of the primary wash separation system of the present invention;
FIG. 7 is a workflow box diagram of the secondary wash separation system of the invention;
FIG. 8 is a workflow box diagram of the three stage wash separation system of the present invention;
FIG. 9 is a workflow box diagram of a four-stage wash separation system of the present invention;
FIG. 10 is a block diagram of the workflow of the mud-water separation system of the present invention;
FIG. 11 is a workflow box diagram of the circulating water pond system of the present invention;
FIG. 12 is a workflow box diagram of the accessory conveyor system of the present invention;
fig. 13 is a block diagram of the workflow of the PLC electrical control system of the present invention.
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The core of the invention is that: (1) effectively removing bentonite foaming agents and the like in the dregs; (2) the slag-soil slurry washing system works effectively; (3) the specification of reasonable grading sand meets the market demand.
The technological process and the plane layout diagram of the system in the technology are shown in the following 1, and the technological process of the invention comprises six parts: (1) a slurry lifting system; (2) a wash separation system; (3) a mud-water separation system; (4) a circulating water pond system; (5) an accessory conveyor system; (6) and a PLC electrical control system.
The process flow of the invention is described below: (1) a chemical pulp lifting system: the sand-containing muck produced by tunnel shield and river dredging engineering is subjected to a slurry dissolving process, so that the muck forms 10% -70% concentration muck (i.e. the solid content is 10% -70%) and then is lifted to enter a washing separation system; (2) a wash separation system: the slag slurry is washed after being separated by the mesh separating equipment with different particle sizes to finish the cleaning process of sand and stone, sand and stone with different particle sizes which are clear, clean and recyclable are obtained, and the obtained sand and stone are transported to respective temporary storage areas (washing separating system bins) through respective conveying systems for storage so as to be recycled in related industries. The residual slurry which is not easy to settle and is obtained after separation enters a mud-water separation system; (3) mud-water separation system: the residual slurry which can not be separated again is subjected to a sludge dehydrator to obtain a mud cake with low water content, the mud cake is transported to a dehydrated mud cake storage bin (temporary storage area) for storage by a mud cake conveying system so as to be recycled in the needed industry, and the supernatant flows into a circulating water tank. (4) a circulating water pond system: the supernatant is supplemented with necessary water, and 0.1% -1.5% of defoaming agent or other necessary and small amount of agent is added according to the requirement through a set agent box, so as to remove bentonite foaming agent remained in the water, clarify, improve and restore the water to a recyclable state, and then the water is pressurized and lifted, and is respectively conveyed to a slurry-dissolving lifting system and a washing and separating system for recycling through a slurry mixing pipe and a flushing pipe. (5) an accessory delivery system: and sand and mud cakes obtained by the washing separation system and the mud-water separation system are respectively conveyed to respective temporary storage areas (storage bins) through sand and mud cake conveying systems (belts, slide ways, pipelines and the like) to serve as raw materials for purchasing and using in industries which are required respectively. (6) PLC electrical control system: the system adopts a PLC+touch screen control mode, is provided with touch screen control (remote control/interface control/automatic/manual control), PLC logic control (automatic control) and local cabinet/box control (automatic/manual control), and is used for assisting in collecting data parameters such as flow state, pressure, flow, time and the like by various analog quantity/switching quantity meters, and can be operated in an automatic/manual control mode. Corresponding control parameters are set according to the operation requirement of the process system, so that the safe and stable operation of the whole sand-stone separation system is realized.
The connections between the systems are described below: (1) The connection between the slurry-melting lifting system and the washing separation system is realized through lifting equipment and a conveying pipeline thereof; (2) The connection between the washing separation system and the mud-water separation system is realized through a pipeline; (3) The mud-water separation system is connected with the circulating water pool system through a pipeline; (4) The circulating water tank system is connected with the slurry-melting lifting system and the washing separation system respectively by pressurizing by a clean water pump to form high-pressure water, a slurry mixing pipe, a flushing pipe and the like; (5) The auxiliary conveying system comprises a sand conveying system and a mud cake conveying system with different particle sizes, wherein the sand conveying system and the mud cake conveying system are respectively connected with the washing separating system and the mud separating system which are respectively corresponding to the storage bins, and the sand conveying system and the mud cake conveying system are realized through belts, slideways, pipelines and the like.
In practical application, equipment parameters and arrangement modes in the sand and stone separation system are required to be determined according to the slag soil treatment capacity, the system plane layout and the like of practical projects. The existing technology for separating sand and stone is applied to the existing engineering for treating shield slag soil generated in the tunnel engineering, and the technology for separating sand and stone is described below in connection with the engineering. The main equipment and structures adopted by the system are as follows.
1 chemical pulp lifting system the chemical pulp lifting system can be divided into two operation modes according to the sequence of chemical pulp process and lifting process, one is that the chemical pulp is firstly lifted and then lifted, and the other is that the chemical pulp is firstly lifted and then lifted. The existing engineering adopts an operation mode of slurry pre-treatment and lifting.
1.1 first slurry and then Lift
1.1.1 slag pool (1) function: as a container for storing the slag.
1.1.2 functions of the slurry tank (1): and (3) mixing the slurry of the slag-containing soil to form suspension slurry under the action of slurry mixing equipment, and primarily removing bentonite foaming agents and the like in the slag soil. (2) primary device: and (5) pulping equipment. The slurry melting equipment adopts a hydraulic and mechanical slurry melting mode, namely a slurry mixing pipe and a stirrer, and a high-pressure spray head is arranged on the slurry mixing pipe. (1) The functions are as follows: the slag soil and the circulating water are mixed to form suspended slag slurry under the action of the water outlet pressure of a high-pressure spray nozzle arranged on the slurry mixing pipe and the stirring action of a stirrer, and bentonite foaming agents and the like in the slag soil are effectively removed. (2) Parameters: the water outlet pressure of the high-pressure spray nozzle is more than 15 kg.f/cm < 2 >
1.1.3 lifting device (1) function: and lifting the suspended slag slurry and part of settled large particles in the slurry dissolving tank to a primary washing and separating system. (2) number: sand pump 3, two standby (or grab conveyor 2 sets, one standby). (3) parameters: sand pump q=150m 3 H, h=25m, n=22 kw; grab conveyor q=150m 3 /h，N＝15kw。
1.2 description of slurry after lifting: the type of equipment is basically the same as that of the prior pulp and then lifting, but the position of the pulp is different.
1.2.1 slag pool (1) function: as a container for storing the slag.
1.2.2 lifting device (1) function: and lifting the dregs in the dregs pool to a primary washing and separating system. (2) primary device: grab conveyor (or screw conveyor) + sand pump. (3) number: each equipment is one for 2 pieces. (4) parameters: and determining according to the residue soil treatment capacity and the system layout of the actual engineering.
1.2.3 slurry melting equipment adopts a hydraulic and mechanical slurry melting mode, the slurry melting equipment is a slurry mixing pipe and a stirrer, and a high-pressure spray nozzle is arranged on the slurry mixing pipe. (1) function: the slag soil and the circulating water are mixed to form suspended slag slurry under the action of water outlet pressure of a high-pressure spray nozzle arranged on the slurry mixing pipe and mechanical stirring, and bentonite foaming agents and the like in the slag soil are effectively removed. (2) parameters: the water outlet pressure of the high-pressure spray head is more than 15 kg.f/cm < 2 >.
1.3 advantages and disadvantages of two types of slurry lifting systems
(1) Slurry-first-then-lift mode: the residual foam on the surface of the dregs is very little, and the dregs are separated well, cleanly and beautiful, and the defect is that the quantity of the lifted dregs is large and the working load of the lifting equipment is relatively large.
(2) Lifting-then-pulping mode: the quantity of the lifted slurry is small, the workload of the lifting equipment is light, but the design requirement of the lifted slurry is high, and the operation effect of the slurry mixing equipment is good.
2 the existing engineering of the washing and separating system is provided with four-level separating equipment with different particle diameters (stone, coarse sand, fine sand and silt) according to market demands. Each set of separation equipment is provided with a set of washing components, and the washing components are used as components of the separation equipment and jointly form a washing separation system with the separation equipment. The washing and separating system realizes the washing and separating of the sand-containing slag soil by simultaneously carrying out washing and separating processes.
2.1A primary scrubbing and separating system is comprised of a combined shaftless separating screen containing scrubbing elements. (1) function: washing the slurry and separating clean stones with the size of more than 8-12 mm. (2) number: 1 sleeve; (3) parameters: the length of the sieve is 4m, the inclination angle of the sieve is about 6-20 degrees, the aperture of the sieve is 8-12 mm, and N=11 kw.
2.2 two-stage wash separation system the two sets of independently operated two-stage wash separation systems are operated:
and (3) sleeving: consists of a combined vibration separating screen with a washing component;
and II, sleeving: consists of a combined shaftless separation screen with a washing assembly.
The two-stage washing separation system is designed to independently finish design indexes for the two sets of equipment, and the equipment can independently operate or simultaneously operate.
(1) The functions are as follows: and washing and separating the residual slurry obtained after the separation of the primary washing and separating system to obtain clean coarse sand with the diameter of 3-8 mm. (2) number: 1 set each; (3) parameters: vibrating screen 5m×1.5m, screen plate inclination angle about 5-15 °, n=5.5kw×2, screen 3-3.5mm; the screen mesh diameter of the second-stage shaftless separation screen is 3-3.5mm, and the rest parameters are the same as those of the first-stage shaftless separation screen.
2.3 three-stage washing separation system is operated by two sets of three-stage washing separation systems which are independently operated:
and (3) sleeving: the three-stage combined separation device comprises a wheel type separation sieve with a washing component, a cyclone separator group and a mechanical dewatering sieve;
and II, sleeving: consists of a combined shaftless separation screen with a washing assembly.
The three-stage washing separation system is designed to independently finish design indexes for the two sets of equipment, and the equipment can independently operate or simultaneously operate.
(1) The functions are as follows: and washing and separating the residual slag slurry obtained after the separation of the secondary washing and separating system to obtain clean fine sand with the diameter of 2-3 mm.
(2) The main equipment comprises: (1) wheel separating screen a. Number: 1 sleeve; b. parameters: the wheel diameter was about 2.8m, the double trough screen 1m, the screen aperture 2mm, n=7.5 kw. (2) Cyclone separator group a. Number: 1 set of the sand pump comprises 2 cyclone separators and 2 sand pumps, and the sand pumps are one by one. b. Parameters: pump q=100deg.m 3 H, h=15m, n=11 kw; (3) mechanical dewatering screen a. Number: 1 station; b. parameters: 2.4mX1.2m, screen 0.2mm, vibration motor power 1.5kw×2; (4) the function of the shaftless separation sieve can replace the three devices; a. quantity: 1 sleeve; b. parameters: the screen mesh of the three-stage shaftless separation screen has a diameter of 2mm, and the rest parameters are the same as those of the first-stage shaftless separation screen.
2.4 the four-stage washing separation system is composed of four-stage combined separation equipment, and comprises a cyclone separator group, a mechanical dewatering screen containing a washing component and the like. (1) function: and washing and separating the residual slurry obtained after the separation of the three-stage washing and separating system to obtain clean powder sand with the diameter of 0.2-2 mm. (2) primary device: (1) cyclone separator group: a. quantity: 1 set of the two cyclone tubes with 2 cyclone tubesThe separator is used with 2 sand pumping pumps. b. Parameters: pump q=100deg.m 3 H, h=15m, n=11 kw; (2) mechanical dewatering screen: a. quantity: 1 sleeve; b. parameters: 2.4mX1.2m, screen 0.2mm, vibration motor power 1.5kw×2.
3 mud-water separation system
3.1 sludge pond: (1) function: and receiving residual slag slurry which is not easy to settle and is separated by a washing and separating system. (2) primary device: stirrer, sludge pump: (1) a stirrer: a. quantity: 2 stations; b. parameters are that the diameter of the blade is 2.5m, the axial length is 4m, the rotating speed is 10rpm, two layers of double leaves are provided, the bottom supporting point is contained, and N=11 kw; (2) sludge pump: a. quantity: 2, one for each. b. Parameters q=200m 3 /h，H＝120m，N＝105kw
3.2 sludge dewatering equipment: the prior engineering adopts a chamber filter press. (1) function: and (3) carrying out mud-water separation on the slag slurry which is conveyed to the filter press from the sludge pool and can not be separated any more. (2) number: 2 sleeves; (3) parameters: filtration area 500m 2 The working pressure is 7-14 kg.f/cm 2, the size of the filter plates is 1600 multiplied by 70mm, the number of the filter plates is 115, and the volume of the filter chamber is about 8m 3 。
4, a circulating water pool system: (1) function: and receiving supernatant obtained after the mud-water separation system, supplementing necessary water quantity into the supernatant by a water delivery mechanism, adding 0.1% -1.5% of defoamer medicaments or other necessary medicaments into the water by a medicament box according to the requirement to obtain circulating water capable of being recycled, and finally pressurizing and lifting the circulating water to a water unit. (2) primary device: clean water pump: (1) type (2): a centrifugal pump; (2) quantity: 3, two-purpose one standby (1 serves for the slurry lifting system and 1 serves for the washing separation system, and the slurry lifting system and the washing separation system share 1 standby pump). (3) Parameters: q=100m 3 /h，H＝25-50m，N＝11kw
5 storage bins: (1) function: as a temporary storage area for sand and mud cakes obtained by the treatment of the sand and stone separation system. (2) number: and 5, namely a first-stage washing and separating system bin, a second-stage washing and separating system bin, a third-stage washing and separating system bin, a fourth-stage washing and separating system bin and a dehydrated mud cake bin. (3) parameters: and determining according to actual engineering requirements. (4) primary device: the conveyor is provided with 1 set, and the distance and the height are determined by actual requirements.
6PLC electrical control system: (1) function: and controlling the operation of the whole sand and stone separation system. (2) primary device: consists of a main control box, a PLC cabinet, a variable frequency cabinet, a field control box and the like.
The following describes the systems of the sand separation technique:
1 chemical pulp lifting system
1.1 System core: the pulping equipment is effectively matched with the lifting equipment; effectively removing bentonite foaming agents and the like in the dregs; the slurry is kept as a suspension mixed liquid and is effectively lifted to a separation system, and meanwhile, the slurry is lifted as once as possible to complete the subsequent separation process by self-flowing.
1.2 System functions: the dregs in the dregs pool are slurried to a mixed suspension with the concentration of 10% -70% according to the need, so that the dregs are easy to convey, and are conveyed to a required elevation through lifting equipment, meanwhile, the need of a subsequent washing and separating system is met, and the removal of bentonite foaming agents and the like on the surface of the dregs and the primary cleaning and separating of coarse and fine sand and the like are completed in the slurrying process.
1.3 System architecture and workflow
1.3.1 Pre-slurrying followed by lifting: consists of a slurry melting tank, slurry melting equipment and lifting equipment. A system workflow box diagram for this mode of operation is shown in fig. 2.
1.3.1.1 system architecture: (1) the functions of the slurry melting tank (1): mixing the dregs and water to form a container for suspending the dregs slurry, and removing bentonite foaming agent in the dregs to finish the primary cleaning and separation of coarse and fine sand. (2) The main equipment comprises: the slurry melting equipment is a slurry mixing pipe and a stirrer, and a high-pressure spray head is arranged on the slurry mixing pipe. (3) Working principle: the circulating water is pressurized by a clean water pump, and the slag soil and the water are mixed to form suspended slag slurry under the stirring action of a stirrer and the bentonite foaming agent in the slag soil is cleaned through the water outlet pressure (> 15 kg.f/cm < 2 >) from the slurry mixing pipe to the high-pressure spray head.
(2) Lifting equipment: (1) the functions are as follows: lifting and conveying slag slurry in the slurry melting tank to a primary washing and separating system; (2) the main equipment comprises: sand pumps (or grapple conveyors); (3) working principle: the kinetic energy of mechanical equipment is utilized to complete the lifting and conveying of the slag slurry from the slurry melting tank to the primary washing and separating system.
1.3.1.2 workflow
(1) And (3) a slurry melting process: the high-pressure circulating water acts on the slag slurry through a high-pressure spray nozzle arranged on a slurry mixing pipe in the slurry melting tank, and under the stirring action of the high-pressure water and a stirrer, the sand-containing slag soil and the circulating water form slag slurry with the solid content of 10% -70% and easy conveying, and meanwhile bentonite foaming agents and the like contained in the slag soil are removed, so that the primary cleaning and separation of coarse and fine sand soil are completed.
(2) Lifting process: the sand pump (or grab bucket conveyor) lifts and conveys the suspended slurry formed in the slurry dissolving tank to the primary washing and separating system through a conveying pipeline.
1.3.1.3 connection of devices and structures
(1) The stirrer and the slurry mixing pipe are arranged in the slurry melting tank, and the slurry melting tank is connected with the circulating water tank through a clean water pump and the slurry mixing pipe; (2) The slurry melting tank is connected with the primary washing separation system through the lifting device and the conveying pipeline thereof, so that the cooperation of the slurry melting device and the lifting device is realized.
1.3.2 first Lift-off and then slurrying
Consists of a slag pool, a slurry melting device and a lifting device. A system workflow box diagram for this mode of operation is shown in fig. 3.
1.3.2.1 System architecture:
(1) Slag pool: (1) the functions are as follows: as a container for storing the slag.
(2) Lifting equipment: (1) the functions are as follows: and lifting and conveying the slag soil in the slag pool to a primary washing and separating system. (2) The main equipment comprises: grab conveyor (or screw conveyor) +sand pump; (3) working principle: and the kinetic energy of mechanical equipment is utilized to finish the lifting and conveying of the dregs from the dregs pool to the primary washing and separating system.
(3) Slurry melting equipment: (1) the functions are as follows: mixing the slag soil with circulating water containing 0.1-1.5% of defoaming agent to form slag slurry, and removing bentonite foaming agent and the like from the slag soil. (2) The main equipment comprises: the slurry melting equipment is a slurry mixing pipe and a stirrer, and a high-pressure spray head is arranged on the slurry mixing pipe. (3) Working principle: the method comprises the steps of conveying the muck to a first-stage shaftless separation sieve of a separation system by using a grab bucket conveyor (or a screw conveyor) +a sand and stone pump, mixing the muck with circulating water to form suspended muck slurry by using high-pressure water (pressure is more than 15kg & f/cm < 2 >) and mechanical stirring in the conveying process, removing bentonite foaming agents and the like in the muck, and primarily completing the cleaning and separation of coarse and fine sand.
1.3.2.2 System workflow (1) lifting procedure: a grab conveyor (or screw conveyor) mounted in the slag pool lifts the slag to a desired elevation so that the slag is conveyed to the primary wash separation system and residual slurry in the slag pool is lifted by the sand pump to the primary wash separation system. (2) a pulping process: in the process of lifting and conveying the dregs, a pulping device is arranged, circulating water and the dregs are fully mixed under the stirring action of high-pressure water and machinery, the dregs reaching the feed inlet of the primary washing and separating system are ensured to form dregs with the solid content of about 10-70%, bentonite foaming agent and the like in the dregs are removed, and meanwhile, the primary coarse and fine sand is cleaned and separated.
1.3.2.3 connection of various devices and structures: (1) The connection of the slag pool and the primary washing and separating system is realized through a lifting device (a grab bucket conveyor or a screw conveyor and a sand and stone pump) and a conveying pipeline thereof, and the connection of the circulating water pool and the slurry melting device is realized through a clean water pump, a slurry mixing pipe and the like. (2) The high-pressure spray heads and other slurry melting equipment on the slurry mixing pipe are arranged along the conveying pipeline of the lifting equipment, so that the matching of the lifting equipment and the slurry melting equipment is realized.
2 washing separation system
2.1 System core: the washing component is effectively matched with the separating component; the impurities such as fine soil on the surface of the sand stone are effectively washed; the specification of the sand and stone separated reasonably meets the market demand.
2.2 System functions: the system separates sand and mud from slag slurry conveyed by a slurry-melting lifting system through separating equipment with different screen apertures, and washes sand and mud while separating sand and mud, so that fine soil and the like adhered to the surface of sand and stone in the slag slurry can fall off, foaming agents and the like are further removed, and clean sand and stone with different specifications can be recycled.
2.3 System architecture and workflow: the process flow frame diagram and the general layout diagram of the washing separation system are shown in fig. 4 and 5.
2.3.1 System architecture: the system should be provided with reasonable-level separation equipment to meet the existing market demands, and the existing engineering of the technical application is provided with separation equipment with four levels of different particle sizes (cobble, coarse sand, fine sand and silt) according to the market demands. The washing component is used as a washing component of the separating device and forms a washing separating system together with the separating device. The system has the functions of washing and separating the slurry, and separates the slurry while washing the slurry.
(1) The functions are as follows: multistage sand and stone separation is carried out on the muck according to the design technical requirements, and sand and stones with different particle sizes, which can be recycled, clean and meet the market demands, are obtained.
(2) The main equipment comprises: (1) primary wash separation system: a first-stage combined shaftless separation sieve; (2) two-stage wash separation system: two-stage combined vibrating separating screen and two-stage combined shaftless separating screen; (3) three-stage washing separation system: three-stage combined separation equipment (wheel type separation sieve, cyclone separator group, mechanical dewatering sieve) +three-stage combined shaftless separation sieve; (4) four-stage wash separation system: four-stage combined separation equipment (cyclone separator set, mechanical dewatering screen).
2.3.2 System workflow
(1) Primary wash separation system: the slag slurry obtained by the slurry-melting lifting system is conveyed to a primary washing and separating system, and the slag slurry is washed, and meanwhile, a separating component of separating equipment separates the slag slurry, so that stones (namely primary sand stones) with the diameter of more than 8-12mm are conveyed into a stone conveying system, and the residual slag slurry is conveyed into a secondary washing and separating system;
(2) Two-stage wash separation system: the residual slag slurry is washed and separated by a secondary combined separation device separation assembly, the obtained coarse sand (namely secondary sand) with the diameter of 3-8mm enters a coarse sand conveying system, and the residual slag slurry enters a tertiary washing separation system;
(3) Three-stage washing separation system: the residual slag slurry is washed and separated by a separation component of three-stage combined separation equipment, the obtained fine sand (namely three-stage sand stone) with the diameter of 2-3mm enters a fine sand conveying system, and the residual slag slurry enters a four-stage washing separation system;
(4) Four-stage wash separation system: and (3) while washing the residual slurry, separating by a separation component of a four-stage combined separation device, and enabling the obtained 0.2-2mm silt (namely four-stage sand stone) to enter a silt conveying system, wherein the residual slurry automatically flows into a sludge pond.
2.3.3 connection of devices and structures
(1) The connection between the circulating water tank and each stage of washing separation system is realized by a clean water pump, a flushing pipe, a high-pressure spray head and the like which are arranged in the circulating water tank.
(2) The cooperation of the washing components and the separating components of the combined separating devices is realized by installing a high-pressure spray head on a flushing pipe above the separating components of the combined separating devices.
(3) Connection of the washing separation systems at each stage: (1) the slag slurry discharge port of the primary washing and separating system is higher than the feed port of the secondary washing and separating system and is connected with the feed port of the secondary washing and separating system through a steel plate diversion trench; (2) the slag slurry discharge port of the secondary washing and separating system is higher than the feed port of the tertiary washing and separating system and is connected with the feed port of the tertiary washing and separating system through a steel plate diversion trench; (3) the slag slurry discharge port of the three-stage washing and separating system is higher than the feed port of the four-stage washing and separating system and is connected with the feed port of the four-stage washing and separating system through a steel plate diversion trench. (4) The bins of each level of washing separation system are respectively positioned at the designated positions, the sides of the separation equipment are provided with slag ports, and sand and stone are conveyed to the corresponding bins through the slag ports by an accessory conveying system (belt, slideway, pipeline and the like). (5) The slag-slurry discharging port of the four-stage washing separation system is connected with the sludge tank of the mud-water separation system through a pipeline, so that the connection between the washing separation system and the mud-water separation system is realized.
2.4 stage wash separation System specification
2.4.1 Primary washing separation System
(1) The system structure is as follows: the system consists of a primary combined shaftless separation screen comprising a washing assembly.
(1) The functions are as follows: and conveying the slurry obtained by the slurry-dissolving and lifting system to a primary washing and separating system, washing and separating the slurry by the primary washing and separating system, further removing the residue of foaming agent substances in the slag soil, and simultaneously obtaining the stone with the surface free of fine soil and more than 8-12 mm. (2) The structure is as follows: the shaftless separation sieve mainly comprises a transmission device, a screening component, a frame, a sealing cover and a feed inlet and a discharge outlet. The screen inclination angle of the shaftless separation screen is about 6-20 degrees, and the screen is a wedge-shaped screen with a pore diameter of 8-12 mm.
(3) Working principle: a. washing assembly: the high-pressure water is used for washing the dregs, so that impurities such as fine soil adhered to the surface of the dregs are removed and then flow away with the liquid. Meanwhile, the residue of foaming agent substances in the dregs is further removed. b. Shaftless separation screen: due to the rotation of the equipment, the slag slurry on the screen surface is turned over and rolled, and the slag slurry is separated to obtain an oversize product (stone) and an undersize product (residual slag slurry).
(2) The system work flow: the workflow block diagram of the system is shown in fig. 6. The slag slurry obtained by the slurry-melting lifting system enters a screen mesh of a shaftless separating screen from a feed inlet of a primary combined shaftless separating screen, and clean cobbles with the particle size of more than 8-12mm are separated under the combined action of high-pressure water washing and the screen mesh. The products (stones) on the screen are conveyed to a temporary storage area (a first-stage washing separation system bin) through a stone conveying system through a slag port at the tail part of the shaftless separation screen, and the products (residual slag slurry) under the screen are conveyed to a feeding port of a second-stage washing separation system through a slag slurry discharging port at the bottom of the shaftless separation screen through a steel plate diversion trench.
(3) Matching: the clean water pump conveys the circulating water of the circulating water pool to the high-pressure spray head arranged above the screen mesh of the primary shaftless separation screen through the flushing pipe, so that the cooperation of the separation assembly and the washing assembly of the primary washing separation system is realized.
2.4.2 two-stage washing separation System
(1) The system structure is as follows: the system consists of a two-stage combined shaftless separation sieve containing a washing component and a two-stage combined vibrating sieve containing a washing component.
(1) The functions are as follows: and (3) conveying the residual slag slurry obtained by separation of the primary washing and separating system to a secondary combined vibrating screen and a secondary combined shaftless separating screen through a steel plate diversion trench for washing and separating, further removing the residue of foaming agent substances in the slag soil, and simultaneously obtaining sand and stones with the surfaces free of fine soil and 3-8 mm.
(2) The structure is as follows: the vibrating screen consists of a screening component, a vibration damper, a vibrator, a driving motor and the like. The inclination angle of the vibrating screen is about 5-15 degrees, and the screen is a manganese steel wire woven net with the aperture of 3-3.5 mm; the structure of the second-level shaftless separation sieve is the same as that of the first-level shaftless separation sieve, and the aperture of the screen is 3-3.5mm.
(3) Working principle: a. washing assembly: the working principle of the washing component is the same as that of the first-stage washing and separating system. b. Separation equipment: the vibrating screen uses the principle of vibration excitation of a vibrating motor to enable slag slurry to be thrown up on the screen surface, and simultaneously makes linear motion forwards to reasonably match with a screen mesh so as to achieve the purpose of separation; the working principle of the second-stage shaftless separation sieve is the same as that of the first-stage shaftless separation sieve.
(2) The system work flow: the workflow block diagram of the system is shown in fig. 7. The residual slag slurry obtained after the separation of the primary washing and separating system enters a feed inlet of the secondary washing and separating system and then enters a screen thereof, and clean coarse sand with the particle size of 3-8mm is separated under the action of high-pressure water washing and the screen. Coarse sand enters a temporary storage area (a secondary washing and separating system bin) of the coarse sand through a coarse sand conveying system through a slag port at the bottom of the screen, and residual slag slurry enters a feeding port of a tertiary washing and separating system through a steel plate diversion trench through a discharge port at the tail of the screen.
(3) Matching: the clean water pump conveys the circulating water of the circulating water pool to a high-pressure spray head arranged above the two-stage vibrating screen and the two-stage shaftless separation screen through a flushing pipe, so that the cooperation of a separation component and a washing component of the two-stage washing separation system is realized.
2.4.3 three stage washing separation System
(1) The system structure is as follows: the system consists of three-stage combined separating equipment (a wheel type separating screen, a cyclone separator group and a mechanical dewatering screen) with a washing component and three-stage combined shaftless separating screen.
(1) Wheel-type separating screen a. Function: and (3) separating the residual slurry obtained by separation of the secondary washing separation system from the slurry obtained by mixing the water-containing sand and stone obtained by separation of the tertiary cyclone separator to obtain the water-containing fine sand with the diameter of 2-3 mm. b. The structure is as follows: consists of a motor, a vibration damper, an impeller, a washing tank, a feed inlet, a feed outlet and the like. c. Working principle: the motor is operated to drive the impeller, so that slag slurry entering the washing tank from the feed inlet rolls and is mutually ground under the rotation of the impeller, impurities covered on the surface of sand and sand are removed, and a water vapor layer of coated sand is destroyed; meanwhile, water is added to form strong water flow, so that impurities and foreign matters with small specific gravity are taken away. Clean sand is taken away by the blades and finally enters the sand discharge port.
(2) Three stage cyclone separator group a. Function: and (3) recycling and separating the residual slag slurry returned to the washing tank after being separated by the three-stage wheel type separating screen. b. The structure is as follows: consists of 2 cyclone separators and 2 sand pumps (one sand pump is used for one sand pump). c. Working principle: the slurry delivered to the inlet of the cyclone separator set by the sand pump has a certain speed, and the slurry makes spiral rotation movement from top to bottom in the cyclone. The pressure at the cyclone sidewall is highest when the liquid exhibits swirling motion. Because the underflow caliber of the cyclone is smaller, part of liquid flows to the center with lower pressure and moves to the overflow pipe while rotating in a spiral manner, namely, an internal cyclone is formed, and finally, the liquid is discharged from the overflow port at the upper part. Meanwhile, the sand is acted by centrifugal force, when the force is larger than the liquid resistance force of the sand, the sand moves to the side wall of the cyclone and is separated from the liquid, and part of liquid is discharged from the bottom flow port.
(3) Three-stage mechanical dewatering screen a. Function: and (3) carrying out dehydration treatment on the water-containing fine sand obtained by the separation of the three-stage wheel type separation sieve to obtain the fine sand with the water content of 2-3mm, which meets the requirements. b. The structure is as follows: the mechanical dewatering screen mainly comprises a screen box, a vibration exciter, a supporting system and a motor. c. Working principle: the motor drives two independent vibration exciters to synchronously and reversely run, and the component force of the centrifugal force generated by the two groups of eccentric mass vibration exciters along the vibration direction is overlapped and reversely centrifugally counteracted, so that a single exciting force along the vibration direction is formed, and the screen box is made to reciprocate and linearly move.
(4) Three-stage shaftless separation sieve a. function: the device can replace the functions of the combined separation equipment (a wheel type separation sieve, a cyclone separator group and a mechanical dewatering sieve), namely, the residual slag slurry obtained by separation of a secondary washing separation system is separated, and clean fine sand with the water content meeting the requirement is obtained. b. The aperture of the screen is 2mm, and the rest structures and the working principle are the same as those of the first-stage shaftless separation screen.
(5) Washing assembly a. function: washing the residue soil entering the wheel type separating screen and the three-stage shaftless separating screen, so that impurities such as fine soil adhered to the surface of the residue soil fall off and further removing foaming agents and the like. b. Working principle: the same as the primary wash separation system wash assembly.
(2) The system work flow: the workflow block diagram of the system is shown in fig. 8. (1) The residual slag slurry obtained after separation by the secondary washing and separating system enters three-stage combined separating equipment (a wheel type separating screen, a cyclone separator group and a mechanical dewatering screen): a. the slag slurry enters the feeding hole of the wheel type separating screen and then enters the washing tank of the wheel type separating screen. Meanwhile, the residual slag slurry which is separated by the wheel type separating screen and returns to the washing tank is conveyed to the three-stage cyclone separator group through the sand pump, and the water-containing sand stone separated by the cyclone separator enters the feeding port of the wheel type separating screen from the bottom flow port of the cyclone separator and enters the washing tank of the wheel type separating screen after being converged with the residual slag slurry separated by the secondary washing separating system. The residual slag slurry obtained by the separation of the three-stage cyclone separator overflows through an overflow port at the top of the cyclone separator, flows into a steel plate diversion trench which connects the three-stage washing separation system and the four-stage washing separation system through a pipeline, and finally enters a feed inlet of the four-stage washing separation system. b. The slurry entering the wheel type separating screen washing tank is washed by high pressure water and the wheel type separating screen impeller is used for separating out water-containing fine sand with the particle size of 2-3mm, and the water-containing fine sand enters the mechanical dewatering screen from the wheel type separating screen slag hole. c. The water-containing fine sand is dehydrated by a mechanical dewatering screen, then enters a temporary storage area (a third-stage washing separation system bin) through a fine sand conveying system through a slag port at the tail part of the dewatering screen, and water enters a fourth-stage washing separation system feed inlet through a steel plate diversion trench through a discharge port at the bottom of the dewatering screen.
(2) The residual slurry obtained after separation by the secondary washing and separating system enters a three-stage combined shaftless separating screen: the slag slurry enters a shaftless separation screen mesh from a three-stage shaftless separation screen feed inlet, and fine sand with the diameter of 2-3mm is separated under the actions of high-pressure water washing and the screen mesh. The products (fine sand) on the screen are conveyed to a temporary storage area (a storage bin of a three-stage washing separation system) through a slag port at the tail part of the three-stage shaftless separation screen through a fine sand conveying system, and the products (residual slag slurry) under the screen are conveyed to a feed port of a four-stage washing separation system through a slag slurry discharge port at the bottom of the shaftless separation screen through a steel plate guide groove.
(3) Connection and mating
(1) Connection of the combined screen: a. the sand pump and the conveying pipeline thereof connect the wheel type separation sieve washing tank with the three-stage cyclone separator group, and the three-stage cyclone separator group is arranged above the feeding port of the wheel type separation sieve, so that the connection between the cyclone separator group and the wheel type separation sieve is realized. b. The slag port of the wheel type separation sieve is connected with the three-stage mechanical dewatering sieve through the steel plate diversion trench, so that the wheel type separation sieve is connected with the mechanical dewatering sieve.
(2) The clean water pump conveys the circulating water of the circulating water pool to the high-pressure spray head arranged above the wheel type separating screen impeller and the three-stage shaftless separating screen mesh through the flushing pipe, so that the cooperation of the separating component and the washing component of the three-stage combined separating device and the three-stage combined shaftless separating screen is realized, and the cooperation of the separating component and the washing component of the three-stage washing separating system is further realized.
2.4.4 four-stage separation system
(1) The system structure is as follows: the system consists of a washing component and four-stage combined separating equipment (a cyclone separator group and a mechanical dewatering screen), wherein the four-stage mechanical dewatering screen consists of a screen component, a water tank and the like. The bottom flow port of the four-stage cyclone separator is positioned above the feeding port of the four-stage mechanical dewatering screen, and the water tank is positioned at the bottom of the screen mesh of the mechanical dewatering screen.
(1) Cyclone separator group a. Function: and separating the residual slurry obtained by the separation of the three-stage washing separation system to obtain the water-containing fine sand with the thickness of 0.2-2 mm. b. The structure is as follows: consists of 2 cyclone separators and 2 sand pumps (one sand pump is used for one time). c. Working principle: the working principle is the same as that of the three-stage cyclone separator group.
(2) Mechanical dewatering screen a. Function: dewatering the water-containing fine sand obtained by the four-stage cyclone separator group, wherein a water tank at the bottom of a screen mesh is used as a container for receiving residual slag slurry obtained by a three-stage washing and separating system. b. The structure and the working principle are basically the same as those of the three-stage mechanical dewatering screen.
(3) Washing assembly a. function: washing the water-containing silt which enters the four-stage mechanical dewatering screen after being separated by the four-stage cyclone separator group, so that impurities such as fine soil adhered to the surface of the silt fall off and further removing foaming agents and the like. b. Working principle: the same as the primary wash separation system wash assembly.
(2) The system work flow: the workflow block diagram of the system is shown in fig. 9. (1) The residual slurry obtained after the separation of the three-stage washing and separating system enters a water tank at the bottom of the four-stage mechanical dewatering screen through a steel plate diversion trench, a sand pump lifts and conveys the slurry in the water tank to an inlet of the four-stage cyclone separator, the slurry is separated by a cyclone separator main body, the water-containing silt enters the four-stage mechanical dewatering screen through a bottom flow opening, and the residual slurry overflows to a sludge pond from an overflow opening at the top of the cyclone separator. (2) And (3) dewatering the water-containing fine sand by a four-stage mechanical dewatering screen while washing the water-containing fine sand by a high-pressure spray nozzle to obtain the powder sand with the water content meeting the requirement and the clean surface of 0.2-2 mm. The silt is conveyed to a temporary storage area (a bin of a four-stage washing and separating system) through a silt conveying system, and substances such as water, fine soil and the like enter a water tank at the bottom of the mechanical dewatering screen.
(3) Matching with
The clean water pump conveys the circulating water of the circulating water pool to the high-pressure spray head arranged above the four-stage mechanical dewatering screen mesh through the flushing pipe, so that the cooperation of the separation component and the washing component of the four-stage washing separation system is realized.
3 mud-water separation system
3.1 the core of the system realizes the effective separation of mud and water, and the obtained circulating water can be recycled to the sand-stone separation system by adding some necessary medicaments into the water.
3.2 system function the system carries out dehydration treatment on the residual slurry which is not easy to settle and is obtained after being treated by the washing separation system, thereby obtaining circulating water which can be recycled to the sand and stone separation system and mud cakes used as backfill soil, and fully realizing the recycling of the residue soil.
3.3 System architecture and workflow: the workflow diagram of the mud-water separation system is shown in FIG. 10.
3.3.1 System architecture: the system consists of a sludge pool, a sludge pump, a sludge dehydrator and the like.
(1) Sludge pond (1) function: and receiving the residual slurry obtained by the washing and separating system, and lifting the slurry to a sludge dewatering machine. (2) The main equipment comprises: a stirrer and a sludge pump. a. A stirrer: the motor is used for driving the stirrer blades to rotate, so that the slurry in the sludge pond is stirred, and the sludge is prevented from depositing in the pond. b. Sludge pump: lifting the slurry in the sludge pond to a sludge dehydrator.
(2) Sludge dewatering machine: the prior engineering adopts a box type filter press. a. The functions are as follows: and (3) carrying out mud-water separation on the slag slurry conveyed from the sludge tank. b. The structure is as follows: the box filter press mainly comprises a frame part, a filtering part, a hydraulic part and an electric part, and the liquid outlet mode of the box filter press comprises open flow and four-corner hidden flow. c. Working principle: under the pressure of a sludge pump, the slag slurry is fed into a filtering chamber, and solids and liquid are separated through filtering of filter cloth.
Feeding: the hydraulic cylinder motor starts, the oil cylinder compresses tightly the filter plate, the pressure filter reaches the maximum pressure, the sludge pump is continuously filled with materials in the filter chamber of the pressure filter, the pressure is gradually increased after the whole filter chamber is filled, when the pressure of the sludge pump reaches the set pressure, the sludge pump enters a pressure maintaining stage, at the moment, the supernatant is obviously reduced, the pump is stopped, and the feeding is finished. And after a period of time, discharging.
And (3) discharging: the automatic liquid receiving turning plate is vertically opened, the pump station motor is started, the hydraulic cylinder is gradually relieved, the piston rod moves backwards to pull the compacting plate back to the initial position, the pulling plate manipulator is driven by the variable frequency motor to the first filter plate to take the plate, the filter cake automatically drops under the action of gravity, the action of the pulling plate removing manipulator is repeated, the filter plates are sequentially pulled open until all the filter cakes are discharged, and the pulling plate removing manipulator returns to the initial position. After the filter material is discharged, the hydraulic cylinder motor is restarted to enter the next working cycle.
3.3.2 System workflow
And a sludge pump arranged in the sludge pond conveys the sludge in the pond to a sludge dehydrator, and mud cakes and supernatant are obtained after dehydration treatment of the sludge dehydrator. The mud cake enters a temporary storage area (dehydrated mud cake storage bin) of the mud cake through a mud cake conveying system, and supernatant flows to a circulating water tank through a pipeline.
3.3.3 connection
The sludge pump and the conveying pipeline thereof connect the sludge pool with the sludge dehydrator, and the supernatant obtained by the sludge dehydrator automatically flows into the circulating water pool through the pipeline.
4 circulating water pond system
4.1 System functions: and receiving supernatant obtained after the mud-water separation system, supplementing necessary water into the supernatant, adding 0.1% -1.5% of defoamer or other necessary agents to obtain circulating water which can be recycled, and pressurizing, lifting and conveying the circulating water to a water unit through a clean water pump.
4.2 system structure and working process: a system workflow block diagram of the circulating water pond system is shown in fig. 11.
4.2.1 System architecture: the system consists of a circulating water tank, a clean water pump and the like. (1) the function of a circulating water tank (1): as a container for receiving the supernatant obtained by the mud-water separation system; (2) the main equipment comprises: 3 clear water pumps (1 pulp, 1 washing, 1 standby); (3) working principle: the mechanical energy of the high-speed operation of the motor is utilized, and the mechanical energy is transmitted and converted into power for lifting and conveying circulating water through the blades of the pump.
4.2.2 working flow (1) of the system supplements necessary water quantity for supernatant fluid obtained by the mud-water separation system and adds 0.1% -1.5% of defoamer or other necessary agents to obtain circulating water capable of being recycled; (2) And the circulating water is respectively conveyed to the slurry-dissolving lifting system and the washing separation system through the slurry mixing pipe and the flushing pipe under the pressurizing and lifting actions of the slurry-dissolving and washing clean water pump.
And 4.2.3, connecting the circulating water tank with the mud-water separation system through a self-flowing pipeline, and connecting the circulating water tank with the slurry-dissolving lifting system and the washing separation system through a slurry-dissolving clean water pump, a slurry mixing pipe, a washing clean water pump and a flushing pipe respectively.
5 accessory conveying system
5.1 System functions: the system conveys stones, coarse sand, fine sand, silt and mud cakes obtained by the muck through a slurry-melting lifting system, a washing separation system and a sludge dewatering system to respective temporary storage areas (storage bins) through respective conveying systems respectively, and the stones, the coarse sand, the fine sand, the silt and the mud cakes are used as raw materials for purchasing and using in industries which are required respectively.
5.2 system architecture and working process: a workflow block diagram of the affiliated conveyor system is shown in fig. 12.
5.2.1 System architecture: the system consists of a stone conveying system, a coarse sand conveying system, a fine sand conveying system, a silt conveying system and a mud cake conveying system.
5.2.2 System workflow: (1) stone delivery system: the system conveys stones with the diameter of more than 8-12mm separated by the primary washing and separating system to a storage bin of the primary washing and separating system through a conveying system (a belt, a slideway, a pipeline and the like). (2) a grit delivery system: the system conveys the coarse sand with the diameter of 3-8mm obtained by the separation of the secondary washing and separating system to a storage bin of the secondary washing and separating system through a conveying system (a belt, a slideway, a pipeline and the like). (3) a fine sand conveying system: the system conveys the fine sand with the diameter of 2-3mm obtained by the separation of the three-stage washing and separating system to a storage bin of the three-stage washing and separating system through a conveying system (a belt, a slideway, a pipeline and the like). (4) silt delivery system: the system conveys the powder sand with the diameter of 0.2-2mm obtained by the separation of the four-stage washing and separating system to a bin of the four-stage washing and separating system through a conveying system (a belt, a slideway, a pipeline and the like). (5) mud cake conveying system: the system conveys mud cakes separated by the mud-water separation system to a dehydrated mud cake storage bin through a conveying system (a belt, a slideway, a pipeline and the like).
6PLC electrical control system: the sand-stone separation system adopts a touch screen+PLC control mode, and a system control frame diagram is shown in FIG. 13 in detail.
6.1 automatic control State
6.1.1 Start-up
(1) Control principle: (1) the starting of each separating device of the washing separating system, the sand and stone conveying system and the washing clean water pump of the circulating water pond system is controlled by the starting of the lifting device. (2) The start of the sludge pump and the sludge cake conveying system is controlled by the working process of the filter press.
(2) The control flow is described: (1) when the slurry melting tank is fed, the material meter inputs detected information into the PLC system, the PLC system sends a starting instruction of the slurry melting clean water pump to the electrical system, the slurry melting clean water pump is started, and the electrical system feeds signals back to the PLC system. (2) Under the action of the slurry-melting clean water pump, the liquid level of the slurry-melting tank rises, and the liquid level meter of the slurry-melting tank inputs the detected information into the PLC system. When the liquid level of the slurry melting tank is higher than the low liquid level value (the liquid level is adjustable and accurate to cm) of the liquid level meter, the PLC system sends a starting instruction of the slurry melting stirrer to the electric system, the slurry melting stirrer is started, and the electric system feeds back a starting signal of the slurry melting stirrer to the PLC system; when the liquid level of the slurry melting tank rises to a liquid level value (the liquid level is adjustable and accurate to cm) in the liquid level meter, the PLC system sends a starting instruction of the lifting device to the electric system, the lifting device is started, and the electric system feeds back a starting signal of the lifting device to the PLC system. (3) After the starting signals of the lifting equipment are fed back to the PLC system, the PLC system respectively sends starting instructions of the chemical washing clean water pump, the first-stage shaftless separation sieve, the stone conveying system, the second-stage shaftless separation sieve, the second-stage vibrating sieve, the coarse sand conveying system, the third-stage shaftless separation sieve, the third-stage wheel type separation sieve, the third-stage sand pumping pump, the third-stage mechanical dewatering sieve, the fine sand conveying system, the fourth-stage sand pumping pump, the fourth-stage mechanical dewatering sieve and the powder sand conveying system to the electric system, the equipment is started, and meanwhile the electric system respectively feeds back the respective starting signals of the equipment to the PLC system. (4) The lifting equipment flowmeter inputs flow information of materials conveyed by the lifting equipment into the PLC system, the PLC system sends a frequency change instruction of the lifting equipment to the electrical system, and the electrical system further adjusts the operation frequency of the lifting equipment and feeds signals back to the PLC system. (5) The first-stage charge level indicator inputs information detected from a feed inlet of the first-stage shaftless separation sieve into a PLC system, the PLC system sends a frequency change instruction of the first-stage shaftless separation sieve to an electrical system, and the electrical system further adjusts the running frequency of the first-stage shaftless separation sieve and feeds signals back to the PLC system. (6) The second-stage level gauge 1 inputs information detected from a feed inlet of the second-stage shaftless separation sieve into a PLC system, the PLC system sends a frequency change instruction of the second-stage shaftless separation sieve to an electrical system, and the electrical system further adjusts the running frequency of the second-stage shaftless separation sieve and feeds signals back to the PLC system; the secondary level gauge 2 inputs information detected from a feed inlet of the secondary vibrating screen into a PLC system, the PLC system sends a frequency change instruction of the secondary vibrating screen to an electrical system, and the electrical system further adjusts the running frequency of the secondary vibrating screen and feeds signals back to the PLC system. (7) The three-stage material level meter 1 inputs information detected from a feed inlet of the three-stage shaftless separation sieve into a PLC system, the PLC system sends a frequency change instruction of the three-stage shaftless separation sieve to an electrical system, and the electrical system further adjusts the operation frequency of the three-stage shaftless separation sieve and feeds signals back to the PLC system; the three-level gauge 2 inputs information detected from a feed inlet of the three-level wheel type separating screen into a PLC system, the PLC system sends a frequency change instruction of the three-level wheel type separating screen to an electric system, and the electric system further adjusts the running frequency of the three-level wheel type separating screen and feeds signals back to the PLC system. (8) Under the action of each separating device and the washing clear water pump, the liquid level of the sludge pool continuously rises, and the liquid level meter of the sludge pool inputs the detected information into the PLC system. When the liquid level of the sludge pool is higher than a low liquid level value (the liquid level is adjustable and accurate to cm) of the liquid level meter, the PLC system sends a starting instruction of the sludge pool stirrer to the electric system, the sludge pool stirrer is started, and the electric system feeds back a starting signal of the sludge pool stirrer to the PLC system. (9) The PLC system sends a start instruction of the filter press to the electrical system, the electrical system further starts the filter press, and a start signal is fed back to the PLC system. The pressure gauge inputs the pressure condition information of the filter press during operation into the PLC system, and the sludge tank liquid level gauge also inputs the sludge tank liquid level information into the PLC system. When the pressure of the filter press reaches the maximum compaction pressure and the liquid level of the sludge tank is higher than the low liquid level value (the liquid level is adjustable and accurate to cm) of the liquid level meter, the PLC system sends a starting instruction of the sludge pump to the electric system, the sludge pump is started, and the electric system feeds back a starting signal of the sludge pump to the PLC system; when the feeding pressure of the filter press reaches a set value (the numerical value is adjustable), the PLC system sends a mud cake conveying system delay starting instruction to the electric system, the mud cake conveying system delay (the time is adjustable and accurate to minutes) is started, and the electric system feeds back signals of the mud cake conveying system to the PLC system. The flow information of the materials conveyed by the sludge pump is input into the PLC system by the sludge pump flowmeter, the frequency change instruction of the sludge pump is sent to the electric system by the PLC system, the running frequency of the sludge pump is regulated by the electric system, and the signal is fed back to the PLC system.
6.1.2 stop
(1) Control principle: (1) the stopping of each device in the sand-stone separation system is directly or indirectly controlled by stopping the slurry-melting clean water pump. (2) And controlling the stop of the sludge pump and the sludge cake conveying system by the working process of the filter press.
(2) The control flow is as follows: (1) when the slurry melting tank stops feeding, the material meter inputs detected information into the PLC system, the PLC system sends a stop instruction of the slurry melting clean water pump to the electrical system, the slurry melting clean water pump stops, and the electrical system feeds signals back to the PLC system. (2) Under the effect of lifting means, the liquid level of the chemical pulp pool drops, and the liquid level meter of the chemical pulp pool inputs the detected information into the PLC system. When the liquid level of the chemical pulp pool is a low liquid level value (the liquid level is adjustable and accurate to cm) of the liquid level meter, the PLC system respectively sends stop instructions of the chemical pulp mixer and the lifting device to the electric system, the chemical pulp mixer and the lifting device stop, and the electric system respectively feeds back stop signals of the chemical pulp mixer and the lifting device to the PLC system. (3) After the stop signal of the lifting equipment is fed back to the PLC system, the PLC system sends a delay stop signal of the primary shaftless separation screen to the electrical system, the primary shaftless separation screen is stopped in a delay (time is adjustable and accurate to seconds), and the electrical system feeds back the signal to the PLC system. (4) After the primary shaftless separation sieve stops, the electric system feeds back a stop signal of the primary shaftless separation sieve to the PLC system, the PLC system respectively sends delay stop signals of the stone conveying system, the secondary shaftless separation sieve and the secondary vibrating screen to the electric system, the stone conveying system, the secondary shaftless separation sieve and the secondary vibrating screen respectively stop in a delay mode (time is adjustable and accurate to seconds), and the electric system respectively feeds back signals corresponding to the equipment to the PLC system. (5) After the secondary shaftless separation sieve and the secondary vibrating sieve are stopped, the electric system respectively feeds back corresponding stop signals to the PLC system, the PLC system respectively sends delay stop signals of the coarse sand conveying system, the tertiary shaftless separation sieve, the tertiary wheel type separation sieve and the tertiary sand pumping pump to the electric system, and the coarse sand conveying system, the tertiary shaftless separation sieve, the tertiary wheel type separation sieve and the tertiary sand pumping pump respectively delay (time is adjustable and accurate to seconds) to stop, and the electric system feeds back signals respectively corresponding to the equipment to the PLC system; after the three-stage wheel type separating screen and the three-stage sand pump are stopped, the electric system respectively feeds back corresponding stop signals to the PLC system, the PLC system respectively sends delay stop signals of the fine sand conveying system and the three-stage mechanical dewatering screen to the electric system, the fine sand conveying system and the three-stage mechanical dewatering screen are delayed (time is adjustable and accurate to seconds) to stop, and the electric system respectively feeds back corresponding signals to the PLC system. (6) After the three-stage mechanical dewatering screen is stopped, the electric system feeds back a stop signal to the PLC system, the PLC system respectively sends delay stop signals of the fine sand conveying system and the four-stage sand pumping pump to the electric system, the fine sand conveying system and the four-stage sand pumping pump are stopped in a delay mode (time is adjustable and accurate to seconds), and the electric system respectively feeds back corresponding signals to the PLC system; after the four-stage sand pump stops, the electric system feeds back a stop signal to the PLC system, the PLC system sends a delay stop signal of the four-stage mechanical dewatering screen to the electric system, the four-stage mechanical dewatering screen stops in delay (time is adjustable and accurate to seconds), and the electric system feeds back the signal to the PLC system. (7) After the four-stage dewatering screen is stopped, the electric system feeds back a stop signal to the PLC system, the PLC system respectively sends delay stop signals of the silt conveying system and the washing clean water pump to the electric system, the silt conveying system and the four-stage sand pump are stopped in a delay mode (time is adjustable and accurate to seconds), and the electric system respectively feeds back corresponding signals to the PLC system. (8) Under the action of the sludge pump, the liquid level of the sludge pump is reduced, and the detected information is input into the PLC system by the sludge tank liquid level meter. When the liquid level of the sludge pool is a low liquid level value (the liquid level is adjustable and accurate to cm) of the liquid level meter, the PLC system respectively sends stop instructions of the sludge pool stirrer and the sludge pump to the electric system, the sludge pool stirrer and the sludge pump are stopped, and the electric system respectively feeds back stop signals of the sludge pool stirrer and the sludge pump to the PLC system. (9) In the running process of the filter press, the pressure gauge inputs pressure condition information of the filter press during working into the PLC system. When the feeding pressure of the filter press reaches a set value (the numerical value is adjustable), the PLC system sends a delay stop instruction of the sludge pump to the electric system, the delay (the time is adjustable and accurate to minutes) of the sludge pump is stopped, and the electric system feeds back a signal to the PLC system; when the filter plate restarts to compress after the filter press finishes discharging, the PLC system sends a delay stop instruction of the sludge pump to the electric system, the sludge cake conveying system stops, and the electric system feeds back signals of the sludge cake conveying system to the PLC system. When the liquid level of the circulating water tank is a low liquid level value of the liquid level meter, the PLC system respectively sends stop instructions of the slurry-melting clean water pump and the washing clean water pump to the electric system, the slurry-melting clean water pump and the washing clean water pump are stopped, and the electric system respectively feeds corresponding signals back to the PLC system.
6.2 manual control state: when the whole system is switched to a manual operation state, the operation of each device is controlled by a manual operation button. When a certain device is switched to a manual state, the device in automatic operation can still operate automatically.
6.3 scram system: the emergency stop button is one, the warning lamp is one, and the amortization button is one.
The invention aims to protect an engineering slag soil and sand-stone separation system, and the invention can recycle and utilize sand stone, fine powder and other substances obtained after sand-containing slag soil generated in tunnel shield and river dredging engineering is separated into sand and stone, the utilization rate of the sand-stone, fine powder and other substances reaches or exceeds 98%, and the problem that the existing shield slag soil is largely abandoned due to high recycling difficulty or low recycling rate is solved. The separated sand can be used as building material; the separated fine powder can be used as raw materials of enterprises needing fine powder, such as paint, and the like; finally, the superfine powder obtained by dehydrating the sludge can be used in the fields of building backfilling and the like, and the water can be recycled into the system.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (2)
1. An engineering muck sand separation system, comprising:
the slurry melting and lifting system is used for melting slurry of the slag soil containing the foaming agent and the circulating water containing the defoaming agent to obtain suspended slurry containing the foaming agent and having the concentration of 10% -70%, and lifting the suspended slurry after the slurry melting to a next mechanism; or lifting the slag soil containing the foaming agent into a pool, and pulping the lifted slag soil and circulating water containing the defoaming agent to obtain suspended slag slurry containing the foaming agent and having the concentration of 10% -70%, wherein the suspended slag slurry flows into a next mechanism;
the washing separation system is used as a next mechanism of the chemical pulp lifting system and is provided with a multi-stage washing separation system, the first-stage washing separation system is connected with the chemical pulp lifting system through a pipeline, the multi-stage washing separation systems are communicated through guide grooves, the multi-stage washing separation system sequentially carries out sand and stone separation on chemical pulp and lifted suspended slag pulp according to the sequence of the screen pore diameters from large to small, and corresponding sand and stone separated by the multi-stage washing separation system are washed at the same time of sand and stone separation, so that sand and stone with different particle diameters and residual slag pulp without foaming agent are obtained;
the mud-water separation system is used for carrying out mud-water separation on the residual slurry obtained after separation after the final-stage washing separation system is carried out, so as to obtain mud cakes and supernatant;
The circulating water pool system is connected with the mud-water separation system, the washing separation system and the slurry-melting lifting system through pipelines, receives supernatant separated by the mud-water separation system, adds water and defoaming agents into the supernatant to form circulating water, and conveys the circulating water to the slurry-melting lifting system and the washing separation system;
the auxiliary conveying system is provided with a plurality of conveying systems, and the conveying systems are in one-to-one correspondence with the multi-stage washing and separating systems and are used for conveying sand and stones with different particle diameters and mud cakes separated by the multi-stage washing and separating systems and the mud-water separating systems to respective storage areas;
the PLC electrical control system adopts a PLC and touch screen control mode to perform switch control and/or regulation control on the starting, stopping and/or frequency of each system and each pipeline;
the chemical pulp lifting system comprises: a slurry melting tank, slurry melting equipment, slurry mixing equipment and lifting equipment; the slurry melting tank is communicated with the circulating water tank system through slurry mixing equipment, receives circulating water conveyed by the circulating water tank system through a slurry melting clean water pump and a slurry mixing pipe, and fully mixes and stirs slag soil containing a foaming agent with the circulating water to form suspended slag slurry with the concentration of 10% -70%; the slurry melting equipment is arranged in the slurry melting tank and is used for mixing and stirring slag soil containing foaming agent and circulating water in the slurry melting tank; lifting equipment, including a sand pump and a grab bucket conveyor or a screw conveyor, for lifting the suspended slag slurry to a next mechanism or lifting the slag soil containing the foaming agent to a slurry melting tank for slurry melting;
The wash separation system includes:
the primary washing and separating system is communicated with the slurry melting tank, and is used for washing and separating suspended slurry, and removing foaming agent and fine soil in the slurry to obtain primary sand and stone;
the feed inlet of the secondary washing and separating system is communicated with the primary washing and separating system through a diversion trench and is lower than the discharge outlet of the primary washing and separating system, and the residual slag slurry after primary separation is washed and separated to remove foaming agent and fine soil remained in the slag slurry, so as to obtain secondary sand and stone;
the feed inlet of the third-stage washing and separating system is communicated with the second-stage washing and separating system through a diversion trench and is lower than the discharge outlet of the second-stage washing and separating system, and residual slag slurry after the second-stage separation is washed and separated, and foaming agent and fine soil remained in the slag slurry are removed, so that third-stage sand and stone are obtained;
the feed inlet of the four-stage washing and separating system is communicated with the three-stage washing and separating system through a diversion trench and is lower than the discharge outlet of the three-stage washing and separating system, and residual slag slurry after three-stage washing and separating is washed and separated, and foaming agent and fine soil remained in the slag slurry are removed, so that four-stage sand stone is obtained;
wherein, the particle size of the first-stage sand is larger than that of the second-stage sand, the particle size of the third-stage sand is larger than that of the fourth-stage sand;
The primary scrubbing and separation system comprises: a primary separation screen and a primary washing assembly;
the primary separation sieve is provided with a primary feed inlet, a primary discharge outlet and a primary screen which is obliquely arranged and can rotate, the feed inlet is communicated with the slurry dissolving tank through a slurry dissolving lifting system, the primary screen rotates to drive slurry entering from the primary feed inlet to overturn and roll so as to separate primary sand and stone containing fine soil and foaming agent and slurry after primary separation, and the primary discharge outlet is used for outputting the slurry after primary separation;
the first-stage washing assembly is suspended at the feed inlet and/or above the first-stage screen, is communicated with the circulating water pool through a flushing pipe and a washing clean water pump, and is used for adding circulating water into the first-stage separation screen and washing the first-stage sand while separating the first-stage sand, so as to remove fine soil impurities and foaming agents adhered to the surface of the first-stage sand and obtain clean first-stage sand;
the secondary wash separation system comprises: at least one set of secondary separation screens and at least one set of secondary washing assemblies;
the secondary screen is used for overturning, rolling or throwing the slag slurry after primary separation entering through the secondary feed inlet, separating out secondary sand and stone containing fine soil and foaming agent and slag slurry after secondary separation, and the secondary feed outlet is used for outputting the slag slurry after secondary separation;
At least one set of secondary washing components, wherein each set of secondary washing components corresponds to one set of secondary separating screen and is arranged at the feed inlet and above the secondary screen, and the secondary washing components are communicated with a circulating water tank through a flushing pipe and a washing clean water pump, so that secondary sand and stone are washed while secondary separation is carried out, fine soil impurities and foaming agents adhered to the surface of the secondary sand and stone are removed, and clean secondary sand and stone is obtained;
the three-stage wash separation system comprises: at least one set of tertiary separation screens and at least one set of tertiary washing assemblies;
the three-stage screen sequentially performs overturning, centrifugal movement and dehydration treatment on the slag slurry after the secondary separation entering through the three-stage feed inlet, removes impurities covered on the surface of sand and water vapor layers of coated sand grains and separates out three-stage sand stone containing fine soil and foaming agent and the slag slurry after the three-stage separation, and the three-stage discharge port is used for outputting the slag slurry after the three-stage separation;
at least one set of three-stage washing components, wherein each set of three-stage washing components corresponds to one set of three-stage separating screen, is arranged at the feed inlet and above the three-stage screen, is communicated with a circulating water tank through a flushing pipe and a washing clean water pump, and is used for washing three-stage sand and stone while carrying out three-stage separation, so that fine soil impurities and foaming agents adhered to the surface of the three-stage sand and stone are removed, and clean three-stage sand and stone is obtained;
The four-stage wash separation system comprises: a four stage cyclone separator, a four stage dewatering screen and a four stage washing assembly;
the four-stage separation sieve is provided with a four-stage feed inlet, a four-stage discharge outlet and a rotatable four-stage screen, wherein the four-stage feed inlet is communicated with the three-stage discharge outlet of the three-stage separation sieve through a diversion trench, the four-stage screen performs separation and dehydration treatment on three-stage separated slag slurry entering through the four-stage feed inlet at one time, water vapor of coated sand grains is removed, water-containing four-stage sand stone and four-stage separated slag slurry are separated, and the four-stage discharge outlet is used for outputting the four-stage separated slag slurry;
a fourth-stage dewatering screen is used for dewatering the water-containing fourth-stage sand after the fourth-stage separation to obtain the fourth-stage sand;
the fourth-level washing assembly is arranged at the feed inlet and above the fourth-level screen, is communicated with the circulating water tank through a flushing pipe and a washing clean water pump, and is used for washing the fourth-level sand and stone while carrying out fourth-level separation, so as to remove fine soil and foaming agent adhered to the surface of the fourth-level sand and stone and obtain clean fourth-level sand and stone;
the first-stage separating screen, the second-stage separating screen and the third-stage separating screen are shaftless separating screens with the same structure, the first-stage separating screen adopts a screen with the aperture of 8-12 mm, the second-stage separating screen adopts a screen with the aperture of 3-3.5mm, and the third-stage separating screen adopts a screen with the aperture of 2-3 mm; the fourth-stage separating screen is a vibrating screen, and the aperture of the screen mesh adopted by the fourth-stage separating screen is 0.2-2 mm;
Or the secondary separation screen is a vibrating screen, and the vibrating screen adopts a manganese steel wire woven net with the screen mesh diameter of 3-3.5 mm;
the three-stage separating screen is a wheel type separating screen, and the aperture of the screen mesh of the wheel type separating screen is 2mm; the fourth-stage separating screen is a vibrating screen, and the aperture of the screen adopted by the fourth-stage separating screen is 0.2-3 mm;
the mud-water separation system includes:
a sludge tank for receiving residual slag slurry after passing through a four-stage washing and separating system;
the stirrer is arranged in the sludge tank and used for stirring residual slag slurry in the sludge tank;
the sludge pump is communicated with the sludge pool through a pipeline and is used for conveying slag slurry in the sludge pool;
the sludge dewatering equipment is communicated with the sludge pool through a sludge pump, and is used for dewatering the slurry conveyed by the sludge pump to obtain a sludge cake and supernatant;
the circulating water pond system includes:
the circulating water tank is communicated with the sludge dewatering equipment through a pipeline and receives supernatant formed in the sludge dewatering equipment;
a water delivery mechanism for adding water into the supernatant in the circulating water tank;
the reagent box is used for adding 0.1% -1.5% of defoaming agent into the supernatant fluid in the slurry mixing equipment and the washing equipment to obtain circulating water containing the defoaming agent;
the slurry melting clean water pump is arranged in the circulating water tank, pressurizes supernatant in the circulating water tank and conveys the supernatant to the slurry melting tank through a slurry mixing pipeline arranged in the slurry melting tank;
The washing clean water pump is arranged in the circulating water tank, pressurizes supernatant in the circulating water tank and conveys the supernatant to the washing separation system through the cleaning pipeline.
2. The engineered slag and sand separation system of claim 1,
the plurality of conveying systems includes: the stone conveying system corresponds to the primary washing and separating system and is used for conveying the primary sand and stone separated by the primary washing and separating system to a storage bin of the primary washing and separating system through a belt, a sliding belt or a pipeline;
the coarse sand conveying system corresponds to the secondary washing and separating system, and 3-10mm coarse sand separated by the secondary washing and separating system is conveyed to a storage bin of the secondary washing and separating system through a belt, a sliding belt or a pipeline;
the fine sand conveying system corresponds to the three-stage washing and separating system, and conveys the three-stage sand separated by the three-stage washing and separating system to a storage bin of the three-stage washing and separating system through a belt, a sliding belt or a pipeline;
the powder sand conveying system corresponds to the four-stage washing and separating system, and the four-stage sand separated by the four-stage washing and separating system is conveyed to a bin of the four-stage washing and separating system through a belt, a sliding belt or a pipeline;
and the mud cake conveying system corresponds to the mud-water separation system, and the mud cake prepared by the mud-water separation system is conveyed to a dehydrated mud cake storage bin through a belt, a sliding belt or a pipeline.
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| CN112759411A (en) * | 2021-02-07 | 2021-05-07 | 中铁隧道集团二处有限公司 | Slurry shield muck treatment system and method |
| CN113042193B (en) * | 2021-03-10 | 2022-10-11 | 中铁十六局集团北京轨道交通工程建设有限公司 | Sand-stone separation and cleaning equipment suitable for recycling of muck and construction method |
| CN113318980A (en) * | 2021-05-22 | 2021-08-31 | 深圳市东深环保科技有限公司 | Silt screening machine and screening process |
| CN114748935A (en) * | 2022-01-18 | 2022-07-15 | 浙江交工集团股份有限公司 | Slurry recycling equipment of concrete mixing plant and slurry recycling process thereof |
| CN114522797B (en) * | 2022-02-25 | 2023-04-07 | 河海大学 | Gravel-doped clay soil-stone separation method based on turbid liquid |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003138878A (en) * | 2001-11-02 | 2003-05-14 | Ohbayashi Corp | Shield driving construction method |
| CN108993767A (en) * | 2018-08-04 | 2018-12-14 | 康明克斯（北京）机电设备有限公司 | A kind of mud and water separating equipment |
| CN109057815A (en) * | 2018-08-03 | 2018-12-21 | 中国电建集团铁路建设有限公司 | One kind being used for earth pressure balanced shield, EPBS dregs and integrated wastewater reutilization system |
| CN110092567A (en) * | 2019-04-11 | 2019-08-06 | 湖南锦佳环保科技有限公司 | A kind of shield soil processing method |
| CN110303033A (en) * | 2019-07-30 | 2019-10-08 | 中铁工程服务有限公司 | A kind of shield-tunneling construction dregs processing system and processing method |
| CN209680777U (en) * | 2019-01-15 | 2019-11-26 | 厦门欣意盛非金属材料科技有限公司 | A kind of architecture sediment washing production line |
| CN212092745U (en) * | 2019-12-27 | 2020-12-08 | 程泉 | Engineering dregs, soil, sand and stone separation system |
-
2020
- 2020-03-04 CN CN202010143326.5A patent/CN111203315B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003138878A (en) * | 2001-11-02 | 2003-05-14 | Ohbayashi Corp | Shield driving construction method |
| CN109057815A (en) * | 2018-08-03 | 2018-12-21 | 中国电建集团铁路建设有限公司 | One kind being used for earth pressure balanced shield, EPBS dregs and integrated wastewater reutilization system |
| CN108993767A (en) * | 2018-08-04 | 2018-12-14 | 康明克斯（北京）机电设备有限公司 | A kind of mud and water separating equipment |
| CN209680777U (en) * | 2019-01-15 | 2019-11-26 | 厦门欣意盛非金属材料科技有限公司 | A kind of architecture sediment washing production line |
| CN110092567A (en) * | 2019-04-11 | 2019-08-06 | 湖南锦佳环保科技有限公司 | A kind of shield soil processing method |
| CN110303033A (en) * | 2019-07-30 | 2019-10-08 | 中铁工程服务有限公司 | A kind of shield-tunneling construction dregs processing system and processing method |
| CN212092745U (en) * | 2019-12-27 | 2020-12-08 | 程泉 | Engineering dregs, soil, sand and stone separation system |
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