CN114618673A - Water-saving sand washing method for building residue soil material - Google Patents
Water-saving sand washing method for building residue soil material Download PDFInfo
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- 239000004576 sand Substances 0.000 title claims abstract description 221
- 238000005406 washing Methods 0.000 title claims abstract description 101
- 239000000463 material Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000002689 soil Substances 0.000 title claims abstract description 24
- 239000002002 slurry Substances 0.000 claims abstract description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000012216 screening Methods 0.000 claims abstract description 36
- 238000011084 recovery Methods 0.000 claims abstract description 28
- 238000002844 melting Methods 0.000 claims abstract description 23
- 230000008018 melting Effects 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000004537 pulping Methods 0.000 claims abstract description 7
- 230000018044 dehydration Effects 0.000 claims description 8
- 238000006297 dehydration reaction Methods 0.000 claims description 8
- 239000004570 mortar (masonry) Substances 0.000 claims description 8
- 229910000617 Mangalloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000010494 dissociation reaction Methods 0.000 claims description 3
- 230000005593 dissociations Effects 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims 1
- 238000004064 recycling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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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
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
- B03B5/56—Drum classifiers
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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
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
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Abstract
The invention provides a water-saving sand washing method for building residue soil materials, which comprises the following operation steps: pulping: mixing the raw materials provided by the feeding mechanism through slurry melting equipment to obtain slurry; screening: screening out stones with the particle size larger than 5mm in the slurry through screening equipment to obtain silt slurry; pre-grading: pre-grading the silt slurry through a pre-grading swirler to obtain underflow coarse sand and pre-grading overflow; sand washing: elutriating the underflow coarse sand by a sand washer to obtain coarse sand and sand-washing overflow; fine sand recovery: recovering the fine sand in the pre-classification overflow through a fine sand recovery cyclone, and adjusting the feed material concentration for fine sand recovery by utilizing the sand washing overflow; and (3) dehydrating: and dehydrating the coarse sand and the fine sand through a dehydrating screen. The invention adopts a pre-grading mode, can effectively treat the building residue soil material with high mud content, can obtain clean finished sand without serially connecting a plurality of sand washers, improves the sand washing efficiency and saves the water for sand washing.
Description
Technical Field
The invention relates to a method for treating and recycling building residue soil materials, in particular to a water-saving sand washing method for building residue soil materials.
Background
The sand washing of high-mud-content residue soil materials in the building industry is carried out after the residue soil materials are slurried into slurry. The existing sand washing technology is that after slurry is dissolved, a plurality of stages of sand washing machines are connected in series, a large amount of clear water is added in the sand washing process, and the sand is washed by the multi-stage sand washing machines for one time and then is recycled and dehydrated through fine sand to obtain a cleaner finished sand material. However, the process increases the equipment investment cost, the sand washer usually needs to be connected in series by 3 or 4 levels to ensure the sand washing cleanliness, and meanwhile, the water consumption needs to reach a solid-liquid ratio of 1:3 or even 1:4, so that the equipment maintenance amount is increased and the load of a sewage treatment system is increased in the actual production process.
In order to ensure that water resources are not circulated in a large amount in the sand washing process, increase the investment of rear-end sewage treatment equipment and increase the load of a whole sand washing system, and in order to reduce the investment of whole plant selection equipment, reduce the overhaul quantity of equipment and save the occupied area of a plant area, a new water-saving sand washing method for building muck materials is necessary to be provided to solve the problems.
Disclosure of Invention
In order to overcome the defects of the conventional sand washing method for the high-mud-content muck materials, the invention aims to provide a water-saving sand washing method for the high-mud-content building muck materials.
The embodiment of the invention can be realized by the following technical scheme:
a water-saving sand washing method for building muck materials comprises the following operation steps:
s1 pulping: mixing raw materials provided by a feeding mechanism through slurry melting equipment to obtain slurry, wherein the raw materials comprise a residue soil material and water;
s2 screening: screening out stones with the particle size larger than 5mm in the slurry through screening equipment to obtain silt slurry;
s3 pre-classification: pre-grading the silt slurry through a pre-grading cyclone to obtain underflow coarse sand and pre-grading overflow, wherein the lower limit of the particle size of the coarse sand is 0.15mm to 0.25 mm;
s4 sand washing: elutriating the underflow coarse sand by a sand washer to obtain coarse sand for dehydration and sand washing overflow;
s5 fine sand recovery: recovering the fine sand in the pre-classification overflow through a fine sand recovery cyclone, and adjusting the feed material concentration for fine sand recovery by utilizing the sand washing overflow, wherein the lower limit of the particle size of the fine sand is 0.074 mm;
s6 dehydration: and dehydrating the coarse sand and the fine sand through a dehydrating screen.
Further, in the slurry melting operation of step S1, the feeding mechanism is composed of a vibrating mechanism and a slurry mixing tank, the vibrating mechanism is used for avoiding the clogging of the raw materials, and the slurry mixing tank is used for fully mixing the raw materials.
Further, in the step S1 slurry melting operation, the slurry melting device is a drum-type device, a spiral material guiding groove is arranged inside the slurry melting device, a motor driving device is arranged outside the slurry melting device, and the slurry melting device rotates clockwise along the tangential direction under the action of the motor driving device to drive the muck material and the water to be mixed inside the slurry melting device.
Further, in the screening operation of step S2, the screening device is disposed at the end of the slurry melting device, a double-layer drum-type screening mechanism is adopted, the inner layer is made of a wear-resistant steel plate with a thickness of 10mm, and is provided with a plurality of screen holes with a diameter of 10mm, so as to avoid impact of large particles on the outer layer, and the outer layer is a wear-resistant manganese steel wire screen mesh with a thickness of 5 mm;
the spiral material guide mechanism is arranged inside the screening equipment and used for standardizing the advancing direction of the slurry, increasing the retention time of the slurry in the screening equipment and improving the screening efficiency;
the tail end of the screening equipment is provided with a strip seam type screen hole with the width of 5mm, and the strip seam type screen hole is used for screening out stones with the grain diameter larger than 5 mm.
Further, in the step S3, in the pre-classification operation, the pre-classification cyclone is a large-diameter long-cone cyclone, and adopts a spiral feeding body structure, and the cone adopts a tapered cone angle, so that when most of the mud in the mud-sand slurry is thrown away in advance, the dissociation of the mud-sand is promoted in a centrifugal field, and the sand washing efficiency is improved.
Further, in the sand washing operation of step S4, the processed material is mortar formed by underflow grit obtained through the classification operation of step S3, and the mud content of the mortar meets the requirement of first-level sand washing.
Further, in the step S4, the sand washer is a wheel type sand washer, and includes a sand washer bucket, an underflow structure and a driving motor, where the underflow structure is used to strengthen classification, reduce turbulence in the tank, and adjust classification particle size.
Furthermore, in the sand washing operation of step S4, additional water is required, and the amount of additional water is adjusted according to the requirement for coarse sand washing and the requirement for fine sand recovery.
Further, the materials processed in the fine sand recovery process of step S5 are the pre-classification overflow obtained in the pre-classification operation of step S3, the sand washing overflow obtained in the sand washing operation of step S4, and the undersize slurry obtained in the dehydration operation of step S6.
Compared with the prior art, the water-saving sand washing method for the building residue soil material provided by the embodiment of the invention at least has the following beneficial effects:
1. the invention provides a water-saving sand washing method for building muck materials, which sequentially comprises slurrying, screening, pre-grading, sand washing, fine sand recycling and dewatering during working, so that sand washing of the building muck materials with high mud content is realized, and clean sand meeting the building sand standard is obtained.
2. The water-saving sand washing method for the building residue soil material, provided by the invention, adopts a rotational flow pre-classification process to pre-classify the mortar after slurrying in order to reduce the production water consumption, so that a large amount of mud can be prevented from being brought into a sand washing machine, and the sand washing difficulty of the sand washing machine is increased.
3. According to the water-saving sand washing method for the building residue soil material, the material treated by the sand washing machine is pre-graded mortar, the mud content is reduced, the sand washing machine does not need to adopt multistage series connection, and clean finished sand can be obtained through one-stage sand washing.
4. According to the water-saving sand washing method for the building residue soil material, provided by the invention, the materials processed by the fine sand recovery cyclone are the pre-classification overflow of the pre-classification cyclone, the sand washing overflow of a sand washing machine and the undersize slurry of a dewatering screen, and the sand washing overflow is controlled by adjusting the water quantity of the supplementary water, so that the feed concentration of the fine sand recovery is adjusted, the requirement of the fine sand recovery can be met, the accurate control of the water for sand washing is realized, and the water for sand washing is saved.
5. The water-saving sand washing method for the building residue soil materials, provided by the invention, can be used for collecting the materials containing fine sand in each operation process in a centralized manner to obtain a high fine sand recovery rate, and can also be used for effectively reducing the water consumption through recycling the water for sand washing to realize the purpose of water saving.
Drawings
FIG. 1 is a flow chart of a water-saving sand washing method of building residue soil materials according to an embodiment of the invention;
FIG. 2 is an apparatus and process flow diagram of a water-saving sand washing method for construction waste materials according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a sand washer according to an embodiment of the present invention.
Reference numerals in the figures
1: pulping equipment, 2: pre-classification swirler, 3: sand washer, 4: fine sand recovery cyclone, 5: dewatering screen, 6: slurry pump, 7: slurry pump, 8: spiral material guiding groove, 9: tapered flat bottom structure, 10: sand washing wheel hopper, 11: underflow structure, 12: a motor drive device.
Detailed Description
The present invention will be further described below based on preferred embodiments with reference to the accompanying drawings.
In addition, the various components on the drawings are enlarged or reduced for convenience of understanding, but this is not intended to limit the scope of the present invention.
Singular references also include plural references and vice versa.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are usually placed when products of the embodiments of the present invention are used, the orientations or positional relationships are merely used for convenience of description and simplification of the description, and the terms do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and therefore, the present invention should not be construed as being limited. Furthermore, the terms first, second, etc. may be used in the description to distinguish between different elements, but these should not be limited by the order of manufacture or by importance to be understood as indicating or implying any particular importance among or between such elements.
The terminology used in the description is for the purpose of describing the embodiments of the invention and is not intended to be limiting of the invention. It is also to be understood that, unless otherwise expressly stated or limited, the terms "disposed," "connected," and "connected" are intended to be open-ended, i.e., may be fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be specifically understood by those skilled in the art.
Referring to fig. 1 and 2, the invention provides a water-saving sand washing method for building muck materials, which comprises the following operation steps:
s1 pulping: mixing raw materials provided by a feeding mechanism through slurry melting equipment to obtain slurry, wherein the raw materials comprise a residue soil material and water;
specifically, the muck material is fed into the slurry melting equipment 1 through a feeding mechanism, meanwhile, pressurized water is fed into the slurry melting equipment 1 through a high-pressure water distribution nozzle, and the water and the muck material are fully mixed in the rotating process of the slurry melting equipment 1 to obtain slurry for the subsequent operation steps;
in some preferred embodiments of the invention, the muck material is conveyed to the feeding platform by the forklift and fed into the feeding mechanism, two rows of high-pressure water distribution nozzles are arranged at the upper part of the feeding mechanism, water is pumped from the clean water tank to the high-pressure water distribution nozzles by the clean water pump, and muddy water is mixed on the feeding mechanism; the feeding mechanism consists of a vibrating mechanism and a slurry mixing tank, the vibrating mechanism is used for avoiding the clogging of raw materials, and the slurry mixing tank is used for fully mixing the raw materials.
In some preferred embodiments of the present invention, the slurry transforming apparatus 1 is a drum-type apparatus, the inside of the apparatus is provided with a spiral material guiding chute 8, the outside of the apparatus is provided with a motor driving device, and the slurry transforming apparatus 1 rotates clockwise in a tangential direction under the action of the motor driving device to drive the muck material and water to be mixed inside to form slurry.
S2 screening: screening out stones with the particle size larger than 5mm in the slurry through screening equipment to obtain silt slurry;
in some preferred embodiments of the present invention, the screening device and the pulp melting device 1 are integrated, specifically, the screening device is disposed at the end of the pulp melting device 1, and a double-layer drum-type screening mechanism is adopted, the inner layer is made of a wear-resistant steel plate with a thickness of 10mm and is provided with a plurality of screen holes with a diameter of 10mm for avoiding impact of large particles on the outer layer, and the outer layer is a wear-resistant manganese steel wire screen with a thickness of 5 mm; the spiral material guide mechanism is arranged inside the screening equipment and used for standardizing the advancing direction of the slurry, increasing the retention time of the slurry in the screening equipment and improving the screening efficiency; the end of the screening equipment is provided with a strip seam type sieve pore with the width of 5mm, slurry is graded by 5mm in the rotating process, wherein materials such as stones with the particle size of more than 5mm enter a waste rock storage yard, and other silt slurry enters a sand washing material pool.
S3 pre-classification: pre-grading the silt slurry through a pre-grading cyclone to obtain underflow coarse sand and pre-grading overflow, wherein the lower limit of the particle size of the coarse sand is 0.15mm to 0.25 mm;
specifically, the mud-sand slurry in the sand washing material pool is pumped to a pre-classification cyclone 2 through a slurry pump 6, classification is carried out in the pre-classification cyclone 2, the slurry does centrifugal motion in the pre-classification cyclone 2 under the condition of pressure feeding, the specific gravity of different particles is different under different centrifugal forces, wherein, the coarse particles move downwards along the circumference to form underflow coarse sand and are discharged to a sand washing machine 3 from a sand setting port, and the rest slurry containing fine particles rotates upwards along the axis to be used as pre-classification overflow and is discharged to a fine sand material pool from an overflow port;
in some preferred embodiments of the present invention, the pre-classification cyclone 2 is a large-diameter long-cone cyclone, and adopts a helical line feeding body structure, and the cone adopts a tapered cone angle, so as to promote the dissociation of silt under a centrifugal force field and improve the sand washing efficiency while removing most of silt in silt slurry in advance;
the pre-grading cyclone 2 adopts a tapered flat bottom structure 9, the tapered flat bottom structure 9 is beneficial to the concentration and grading of materials with higher mud content, and the graded granularity of pre-grading can be effectively controlled, in the embodiment of the invention, the graded granularity of pre-grading is controlled to be 0.15mm to 0.25mm, namely, the lower limit of the grain size of coarse sand obtained through pre-grading operation is 0.15mm to 0.25mm, the particles with the bottom larger than the lower limit of the grain size form underflow coarse sand to enter a sand washer 3, and the rest slurry containing the particles with the grain size smaller than the lower limit of the grain size is discharged into a fine sand material pool as pre-grading overflow.
S4 sand washing: elutriating the underflow coarse sand by a sand washer to obtain coarse sand for dehydration and sand washing overflow;
in the embodiment of the invention, the underflow grit obtained in step S3 enters the sand washer 3, is elutriated in the sand washer 3 in the form of mortar, the grit obtained after elutriation is fished out and sent to the dewatering equipment 5, and the rest of slurry containing fine sand is discharged into a fine sand material pool as sand washing overflow, because the silt in the mortar is fully dissociated and the mud content reaches the requirement of 1-level sand washing, the increase of the difficulty of sand washing caused by bringing a large amount of mud into the sand washer 3 is avoided, and multi-level sand washing is not needed, thereby realizing the effect of saving water for sand washing;
in the embodiment of the invention, a wheel type sand washer is used for sand washing in the sand washing process, additional water needs to be added in the sand washing process, the wheel type sand washer elutes coarse sand in the rotation process of a wheel bucket and then fishes the coarse sand out through the wheel bucket, fig. 3 shows a structural schematic diagram of the sand washer 3 according to a specific embodiment of the invention, as shown in fig. 3, the sand washer 3 comprises a sand washing wheel bucket 10, an under-overflow structure 11 and a motor driving device 12, under the action of the motor driving device 12, the sand washing wheel bucket 10 is driven to rotate through a transmission belt, so that the coarse sand is elutriated in a sand washing groove and then fished out, the rest slurry containing fine sand enters the under-overflow structure 11, the under-overflow structure 11 can carry out reinforced classification, reduce turbulence in the groove and can flexibly adjust the classification granularity of the sand washing overflow, in the embodiment of the invention, the classification granularity of the sand washing overflow is the same as the classification granularity of the pre-classification in the step S3, after grading, the slurry containing fine sand enters a fine sand material pool;
in some preferred embodiments of the present invention, the water amount of the additional water in the sand washing operation of step S4 is adjusted according to the requirement for elutriation of coarse sand and the requirement for recovery of fine sand, and by adjusting the water amount of the additional water added to the sand washer 3, the coarse sand after elutriation can meet the requirements for cleanliness, and the like, and at the same time, the flow rate of the overflow of the sand washing entering the fine sand material pool can be adjusted, and further the adjustment of the feed material concentration for recovery of fine sand is realized, so as to meet the requirement for recovery of fine sand, and achieve a higher fine sand recovery rate.
S5 fine sand recovery: recovering the fine sand in the pre-classification overflow through a fine sand recovery cyclone, and simultaneously adjusting the feed material concentration for recovering the fine sand by utilizing the sand washing overflow, wherein the lower limit of the particle size of the fine sand is 0.074 mm;
in some embodiments of the present invention, the materials processed in the step S5 fine sand recovery process are the pre-classification overflow obtained in the step S3 pre-classification operation, and the sand washing overflow obtained in the step S4 sand washing operation, after entering the fine sand material pool, the materials are pumped to the fine sand recovery cyclone 4 through the slurry pump 7, under the action of the centrifugal force field of the fine sand recovery cyclone 4, the fine sand particles with the particle size larger than 0.074mm are recovered, the recovered fine sand enters the dewatering device 5, and the upper overflow of the fine sand recovery cyclone 4 is the waste water after sand washing, and enters the waste water treatment system.
S6 dehydration: dehydrating the coarse sand and the fine sand through a dehydrating screen;
specifically, coarse sand fished out by a sand washing wheel bucket 10 of the sand washing machine 3 and fine sand recycled by the fine sand recycling cyclone 4 enter the dewatering screen 5 together for dewatering, and the screen surface of the dewatering screen 5 discharges finished sand.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit of the invention, and it is intended to claim all such changes and modifications as fall within the scope of the appended claims.
Claims (9)
1. A water-saving sand washing method for building residue soil materials is characterized by comprising the following operation steps:
s1 pulping: mixing the raw materials provided by the feeding mechanism through pulping equipment to obtain slurry, wherein the raw materials comprise muck materials and water;
s2 screening: screening out stones with the particle size larger than 5mm in the slurry through screening equipment to obtain silt slurry;
s3 pre-classification: pre-grading the silt slurry through a pre-grading cyclone to obtain underflow coarse sand and pre-grading overflow, wherein the lower limit of the particle size of the coarse sand is 0.15mm to 0.25 mm;
s4 sand washing: elutriating the underflow coarse sand by a sand washer to obtain coarse sand for dehydration and sand washing overflow;
s5 fine sand recovery: recovering the fine sand in the pre-classification overflow through a fine sand recovery cyclone, and adjusting the feed material concentration for fine sand recovery by utilizing the sand washing overflow, wherein the lower limit of the particle size of the fine sand is 0.074 mm;
s6 dehydration: and dehydrating the coarse sand and the fine sand through a dehydrating screen.
2. A water-saving sand washing method for building residue soil materials according to claim 1, characterized in that:
in the slurry melting operation of the step S1, the feeding mechanism is composed of a vibrating mechanism and a slurry mixing tank, the vibrating mechanism is used for avoiding the clogging of the raw materials, and the slurry mixing tank is used for fully mixing the raw materials.
3. A water-saving sand washing method for building muck materials according to claim 1, characterized in that:
in the step S1 slurry melting operation, the slurry melting device is a drum-type device, a spiral guide chute is arranged inside the slurry melting device, a motor driving device is arranged outside the slurry melting device, and the slurry melting device rotates clockwise along the tangential direction under the action of the motor driving device to drive the muck material and the water to be mixed inside the slurry melting device.
4. A water-saving sand washing method for building residue soil materials according to claim 1, characterized in that:
in the screening operation of the step S2, the screening equipment is arranged at the tail end of the pulping equipment, a double-layer drum type screening mechanism is adopted, the inner layer is made of a wear-resistant steel plate with the thickness of 10mm, and is provided with a plurality of screen holes with the aperture of 10mm for avoiding the impact of large particles on the outer layer, and the outer layer is a wear-resistant manganese steel wire screen with the thickness of 5 mm;
the spiral material guide mechanism is arranged inside the screening equipment and used for standardizing the advancing direction of slurry, increasing the retention time of the slurry in the screening equipment and improving the screening efficiency;
the tail end of the screening equipment is provided with a strip seam type screen hole with the width of 5mm, and the strip seam type screen hole is used for screening out stones with the grain diameter larger than 5 mm.
5. A water-saving sand washing method for building residue soil materials according to claim 1, characterized in that:
in the step S3, in the pre-classification operation, the pre-classification cyclone is a large-diameter long-cone cyclone, a spiral line feeding body structure is adopted, and the cone adopts a tapered cone angle, so that when most of mud in the mud-sand slurry is removed in advance, the dissociation of the mud-sand is promoted in a centrifugal force field, and the sand washing efficiency is improved.
6. A water-saving sand washing method for building residue soil materials according to claim 1, characterized in that:
in the sand washing operation of the step S4, the processed material is mortar formed by underflow coarse sand obtained by the grading operation of the step S3, and the mud content of the mortar meets the requirement of first-grade sand washing.
7. A water-saving sand washing method for building residue soil materials according to claim 1, characterized in that:
in the step S4, the sand washer is a wheel type sand washer and comprises a sand washer bucket, an underflow structure and a driving motor, wherein the underflow structure is used for strengthening classification, reducing turbulence in the tank and adjusting classification granularity.
8. A water-saving sand washing method for building residue soil materials according to claim 1, characterized in that:
in the sand washing operation of the step S4, additional water needs to be added, and the water quantity of the additional water is adjusted according to the requirement for coarse sand washing and the requirement for fine sand recovery.
9. A water-saving sand washing method for building residue soil materials according to claim 1, characterized in that:
the materials processed in the fine sand recovery process of step S5 are the pre-classification overflow obtained in the pre-classification operation of step S3, the sand washing overflow obtained in the sand washing operation of step S4, and the undersize slurry obtained in the dehydration operation of step S6.
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| CN101700446A (en) * | 2009-10-27 | 2010-05-05 | 湖州新开元碎石有限公司 | Sand-water separating and recycling method |
| CN203862376U (en) * | 2014-05-27 | 2014-10-08 | 张荣国 | Gravel washing, recovering and dewatering all-in-one machine |
| CN204380842U (en) * | 2014-11-21 | 2015-06-10 | 福建南方路面机械有限公司 | A kind of washed-out sand fine sand reclaims dehydrating integrated machine |
| CN206763115U (en) * | 2017-03-30 | 2017-12-19 | 四川磊蒙机械设备有限公司 | Fine sand reclaims all-in-one |
| CN108940570A (en) * | 2018-07-10 | 2018-12-07 | 吴海屏 | A kind of waste disposal grading technology |
| 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 |
| CN211964558U (en) * | 2020-01-16 | 2020-11-20 | 福建南方路面机械股份有限公司 | Building dregs recycling equipment |
| CN212524526U (en) * | 2020-05-29 | 2021-02-12 | 青岛恩普环保设备有限公司 | Engineering spoil tail slurry water environmental protection processing system |
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