CN111266384A - Building muck on-site recycling system - Google Patents

Abstract

A building muck on-site recycling system comprises: the sand-stone separation production line is used for primarily screening building residue soil, sand-stone materials are screened to the sand-stone screening production line for further screening, and screened mud and the like are conveyed to the mud treatment production line for recycling bricks, so that the recycling of the building residue soil is realized, and the recycling problem of the building residue soil is effectively solved.

Description

A system for on-site recycling and reuse of construction waste

technical field

The invention relates to a system for on-site recycling and reuse of construction slag, in particular to a construction slag with relatively high sand and gravel content excavated from urban construction such as high-rise foundation pit excavation, subway tunnel excavation, etc. A system for separating and reusing these construction wastes.

Background technique

At present, the sand materials used in construction projects are basically collected from rivers, but excessive digging of river (river) sand will cause the river (river) bed to decline as a whole. It is easy to cause the water level to drop, making it difficult to obtain water for irrigation and domestic water along the line. Therefore, it has become a general trend that the country gradually prohibits disorderly excavation of river (river) sand, resulting in tight supply of sand materials, soaring prices and rising construction costs. On the other hand, in order to protect cultivated land, the use of clay-fired bricks has been banned in China, and the non-fired bricks currently used in the market are inferior to clay bricks in strength and durability. cost.

At the same time, in urban construction, the construction slag excavated from foundation pits is currently abandoned and accumulated in the wilderness, which not only occupies land or even occupies farmland or forest land, but is not conducive to the growth of vegetation, and even causes environmental damage. If the damage is further, the dust will increase for a long time. If it rains for a long time, there is also the danger of mudslides, which will affect the safety of life and property.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a system for on-site recycling and reuse of construction slag, which can effectively solve the problem of urban slag disposal, and at the same time, can solve the problems of tight supply of sand and gravel during construction.

In order to solve the above problems, the present invention provides a system for on-site recycling and reuse of construction waste, including: a sand and gravel separation production line: using a dump truck or a loader loading device to transport the construction waste with high sand and gravel content to the coarse steel mesh for separation At the same time, it is supplemented by the high-pressure water impact separation device, so that the sand and gravel are initially separated and the mud is dissolved in the water. The coarse steel mesh separation device is placed at an inclination of 45°-50°, the transverse steel bars are placed above, and the longitudinal steel bars are placed below the transverse steel bars, which are used to increase the resistance of the falling stone, prolong the impact time of high-pressure water, and increase the "stone impact". The role of "stone" to improve the separation rate of sand and gravel. The medium and fine mud and sand slurry flow separated by the coarse steel mesh separation device flows into the double-screw sand washing device under the action of its own weight. The double-screw sand washing device includes a feeding chute, a double-screw sand washing machine, a drive system and a discharge chute. The slurry flow of medium and fine mud and sand enters the feeding chute, the double-screw sand washer and the discharge chute in turn. The double-screw sand washer is driven by the drive system to fully grind and separate the medium and fine mud and sand, and then convey it to the discharge chute. Medium and fine sand screening drum device. The medium and fine sand and gravel screening drum device includes the second feeding spiral blade segment, the second sand and gravel frying and washing segment, the second round hole sieve plate segment and the second discharging spiral blade segment, which are set at an inclination of 5-8 degrees, and the inlet is high and The outlet is low, 2.2-2.5m in diameter and 16-18m in length. The medium and fine mud and gravel enter the feed spiral blade segment, the sand and gravel frying and washing section, the round-hole sieve plate section and the discharging spiral blade segment in turn. , the mud is dissolved in water, and the round-hole sieve plate section screens the sand, stone, and mud-water mixture that meets the size specifications into the debris flow trough. The device is crushed. The stone crushing device first cleans up the humus organic matter, plastics and other sundries through high-pressure gas, and then crushes the oversized sand and stone mixture and transports it to the coarse sand and gravel screening drum device for re-screening. separation. The coarse mud and gravel mixture separated by the coarse steel mesh separation device rolls down to the coarse sand and gravel screening drum device under the action of its own weight. The coarse sand and gravel screening drum device also includes the first feeding spiral blade segment, the first sand and gravel frying and washing segment, the first circular hole sieve plate segment and the first discharging spiral blade segment, which are set at an inclination of 4-6 degrees. The outlet is low, the diameter is 3.0-3.2m, and the length is 12-15m. Compared with the medium and fine sand and gravel screening drum device, the rigidity, strength and wear resistance of the blade materials in each section of the coarse sand and gravel screening drum device are higher. The coarse mud-gravel mixture enters the feed spiral blade segment, the sand-gravel frying and washing section, the round-hole sieve plate section and the discharge spiral blade segment in turn. , the mud is dissolved in water, and the round-hole sieve plate section screens the sand, stone and mud-water mixture that meets the size specifications into the debris flow trough, and the over-sized sand and stone mixture is transported to the stone crushing device through the discharge spiral blade segment. It is also crushed and then sent to the coarse gravel screening drum device for re-screening and separation.

Sand and gravel screening production line: the sand, stone and mud-water mixture from the debris flow trough first reach the stone washing device. After the sand and stone mixture is washed and drained by the stone washing device, it is transported to the stone vibration screening The sand and stone mixtures that meet the size specifications are screened according to different particle sizes and stacked in different sand and gravel piles respectively. Then, the remaining sand is washed and drained by the sand washing device, and sent to the sand vibrating screening device. The sand vibrating screening device sieves the sand according to different particle sizes and stacks them in different sand The remaining mud water will all flow into the mud and rock pool, and then enter the mud treatment system.

Slurry treatment production line: The mud in the mud pool is transported to the mud sedimentation tank by the mud pump, and the soil and silt in the mud are settled down, so that the surface layer gradually forms clear water, which is collected and reused after filtration. The mud and powder at the bottom of the mud sedimentation tank The sand is transported to the mud dewatering device to reduce the moisture content to below 35%. The deslimed water is collected and reused. The dewatered soil and silt are sent to the mixing device. At the same time, 13%-16% mass of shale material is added to complete the process. After mixing, high-performance mud is formed, and the high-performance mud is transported to the extrusion device to complete the brick making, and then stacked in the stacking drying yard for natural drying or air drying, and the bricks after drying are put into the firing device. , so as to complete the sintering and become building bricks.

Further, in the above-mentioned construction waste site recycling system, the coarse steel mesh separation device is inclined at 45°-50°, the length is 7-8m, the width is 3.5-4m, and the length of the side length of the steel mesh mesh gap is 60mm, The diameter of transverse reinforcement is 50mm, and the diameter of longitudinal reinforcement is 40mm.

Further, in the above-mentioned construction waste on-site recycling system, the horizontal steel bars of the coarse steel mesh are placed above, and the longitudinal steel bars are placed below the horizontal steel bars, which are used to increase the resistance of the falling stone, increase the impact time of high-pressure water, and increase the "stone". The effect of "beating the stone" can improve the separation rate of sand and gravel.

Further, the double helixes of the double helix sand washing device in the above-mentioned construction waste on-site recycling system are installed in parallel and rotate in the middle direction.

Further, the bottom of the mud pool in the above-mentioned construction waste on-site recycling system is made of a reinforced concrete structure, and the bottom is inclined to one end.

Further, the mud sedimentation tank in the above-mentioned construction residue on-site recycling system includes several small sedimentation tanks, and each small sedimentation tank includes a mud injection port and a dewatering pump.

Further, the mud dewatering device in the above-mentioned construction waste on-site recycling system is a screw extrusion device.

In the invention, the construction slag excavated from the construction site is processed on the spot, and the sand, stone and soil are separated out, and the soil is fired respectively, and the sand and stone are used as concrete raw materials for production.

Description of drawings

FIG. 1 is a layout diagram of an embodiment of the present invention.

FIG. 2 is a front view of the structure of the device for separating the coarse steel mesh according to the present invention.

FIG. 3 is a side view of the structure of the device for separating the coarse steel mesh according to the present invention.

Figure 4a is a schematic structural diagram of the double-spiral sand washing device of the present invention.

Fig. 4b is a left side view of Fig. 4a.

FIG. 5 is a schematic structural diagram of a medium-fine sand and gravel screening drum device or a coarse sand and stone screening drum device according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of the installation structure of the hook-shaped blade in the water-soluble frying and washing section of the sand and gravel screening drum of the present invention.

Fig. 7 is a schematic diagram of the mixture of the present invention being sprinkled in the shape of a material curtain along the circular section of the water-soluble frying and washing section inside the sand and gravel screening drum device.

Reference number:

1: Sand and gravel separation production line; 11: Dump truck or loader feeding device; 12: High-pressure water impact separation device; 13: Coarse steel mesh separation device; 14: Double spiral sand washing device; 1401: Feeding chute; 1402: Double Spiral sand washing machine; 1403: Drive system; 1404: Discharge chute; 15: Medium and fine sand and gravel screening drum device; 1501: Second feeding spiral blade segment; 1502: Second sand and gravel frying and washing section; 1503: Second 1504: The second discharging spiral blade segment; 16: The coarse sand and stone screening drum device; 1601: The first feeding spiral blade segment; 1602: The first water-soluble frying and washing hook leaf segment; 1603: The first A round hole sieve plate section; 1604: The first discharge spiral blade segment; 17: Stone crushing device; 2: Sand and gravel screening production line; 21: Debris flow trough; device; 25: sand washing device; 26: sand vibrating screening device; 27: mud overflow device; 3: mud treatment production line; 31: mud pool; 32: mud sedimentation tank; 33: mud dewatering device; 34 : mixing device; 35: extrusion device; 36: stacking drying yard; 37: firing device.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the specific embodiments and the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present invention.

In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for description purposes, and cannot be understood as indicating or implying relative importance.

Referring to Fig. 1 to Fig. 7 , the system for on-site recycling and reuse of construction waste shown in this embodiment includes the following devices:

Sand and gravel separation production line 1: The construction waste is transported to the coarse steel mesh separation device 13 through the dump truck or the loading device 11 of the loader, and the coarse steel mesh separation device is installed at an inclination of 45°-50°. At the top, the longitudinal steel bars are below the horizontal steel bars, and the horizontally installed steel bars are used to increase the resistance of the falling stone, prolong the impact time of high-pressure water, and increase the collision probability of "stone and stone". Under the impact of the high-pressure water impact separation device 12, it is initially broken, and the mud, sand and stone mixture with a size of less than 60mm falls into the debris flow groove 21 through the grid of the coarse steel mesh separation device, and flows into the double-screw sand washing device 14. The double-screw sand washing device The 14 machine includes a feeding chute 1401, a double-screw sand washer 1402, a drive system 1403, and a discharge chute 1404. The mixture flows into the double-screw sand washer 1402 through the feed chute 1401. Driven by the drive system 1403, a pair of The parallel-installed double helix rotates from both sides to the middle to fully grind and separate the medium and fine sand and gravel slurry mixture, and then push the mixture discharge chute 1404 to convey it to the medium and fine sand and gravel screening drum device 15 . The medium and fine sand and gravel screening drum device 15 includes a second feeding spiral blade segment 1501, a second sand and gravel frying and washing segment 1502, a second circular hole sieve plate segment 1503, and a second discharging spiral blade segment 1504, inclined 5-8 degrees Setting, the inlet is high and the outlet is low, the diameter is 2.2-2.5m, the length is 16-18m, the diameter of the circular screen hole is 50mm, the medium and fine sand and gravel mud mixture enters the second feeding spiral blade segment 1501, the second sand and gravel in turn The frying and washing section 1502, the second circular hole sieve plate section 1503, the second discharging spiral blade section 1504, the second sand and gravel frying and washing section 1502 further crushes the sand and washes it repeatedly with high pressure water to form a mixture of sand and stone. The round hole sieve plate section 1503 screens the sand and stone mixture with a size of less than 50mm and enters the debris flow tank 21 to flow to the next production process system. The stone crushing device 17 is crushed. The stone crushing device 17 first cleans up the septic organic matter, plastics and other sundries through high-pressure gas, and then crushes the mixture through the crusher and transports it to the coarse steel mesh separation device 13 for reassembly. separation. The coarse stones or mud blocks with a size greater than or equal to 60 mm separated by the coarse steel mesh separation device 13 are washed into the coarse sand screening drum device 16 for abrasive separation. The coarse sand screening drum device 16 includes a first feeding screw. The blade segment 1601, the first sand and gravel frying and washing segment 1602, the first round-hole sieve plate segment 1603, and the first discharge spiral blade segment 1604 are set at an inclination of 4-6 degrees, the inlet is high and the outlet is low, and the diameter is 3.0-3.2m , the length is 12-15m, and the diameter of the circular sieve is 50mm. Coarse stones and mud blocks sequentially enter the first feeding spiral blade segment 1601, the first sand and gravel frying and washing segment 1602, the first round-hole sieve plate segment 1603 and the first discharging spiral blade segment 1604, and the first sand and gravel frying and washing segment 1604. 1602 Further crush the rough stones and mud blocks and repeatedly scour and cut them with high-pressure water to form a mixture of sand, stone and mud. The first round hole sieve plate section 1603 screens the sand and stone mixture with a size less than 50mm into the debris flow groove 21 and flows down In the production process system, the sand and stone mixture with a size greater than or equal to 50mm is transported to the stone crushing device 17 through the first discharge screw blade segment 1604 for further processing.

Sand and gravel screening production line 2: The mixture of sand, stone and mud flowing from the debris flow tank 21 is transported to the stone vibrating screening device 23 through the stone washing device 22. The stone washing device 22 is usually a chain bucket type stone lifting equipment, During the washing process of the stone washing device 22, the sand and stone mixtures that meet the size specifications are washed with water and drained, and then transported to the stone vibrating screening device 23, screened according to different particle sizes and stacked respectively in For different sand and gravel yard 24, the specific screening standard can be implemented in accordance with the GB/T14685-2001 "pebble and crushed stone for construction" size standard, and the specific particle size specifications can be 4.75mm-9.5mm, 9.5mm-16mm, 16mm- 19mm, 19mm-26.5mm, 26.5mm-31.5mm, 31.5mm-37.5mm and 37.5mm-53mm; then the remaining sand is washed and drained by the sand washing device 25, and sent to the sand vibrating screen The device 26, the sand vibrating screening device 26 sieves the sand according to different particle sizes and stacks them in different sand and gravel yards 24. The specific screening standard can be in accordance with the size of GB/T14685-2001 "Pebbles and Crushed Stones for Construction" Standard implementation, the specific particle size specifications can be respectively 0.15mm-0.3mm, 0.3mm-0.6mm, 0.6mm-1.18mm, 1.18mm-2.36mm, and 2.36mm-4.75mm; all the remaining mud water flows into the mud pool 31, and enter the mud treatment device. A mud water overflow device 27 is set at a part of the debris flow tank 21, so that part of the mud water can directly overflow to the mud pool 31. The debris flow tank 21 is a concrete structure, connected to the outlet of the sand and gravel screening drum device in front, and then connected to the mud pool 31. , According to the production process flow, the sand, gravel and mud-water mixture can flow from high to low.

Slurry treatment production line 3: The mud in the mud pool 31 is transported to the mud sedimentation tank 32, wherein the bottom of the mud pool 31 is made of reinforced concrete structure, and the bottom is inclined to one end, so that the soil dissolved in the water is easy to settle to the lower part of the mud pool. At one end, water with less mud and sand is at the higher end. The mud sedimentation tank 32 includes several small sedimentation tanks, and each small sedimentation tank includes a mud injection port and a dewatering pump, and can operate independently. The top of each small sedimentation tank has a lower cone, and a thick mud pump is set at the bottom; it is transported to the mud dewatering device 33 for dehydration treatment, and can be injected into the mud dewatering device 33 through the thick mud pump at multiple points for filtration and dewatering, thereby forming a mud cake, The extruded and filtered water is precipitated to form clear water and collected by filtration, which can gradually form clear water by sinking the soil and silt in the mud to the surface layer. The sand and gravel screening drum device 15, the coarse sand and gravel screening drum device 16, the stone washing device 24, and the sand washing device 27 are reused, and the soil and silt at the bottom of the mud sedimentation tank 32 are transported to the mud dewatering device 33, and the mud dewatering device 33 is composed of multiple sets of screw extruding devices. After dehydration, the moisture content can be reduced to below 35%. The deslimed water is collected and reused. After the dehydration is completed, the soil and silt enter the mixing device 34. % mass proportion of shale material, after the mixing is completed, high-performance mud is formed, and the high-performance mud is transported to the extrusion device 35 to make bricks completely, and is stacked in the stacking drying yard 36, so as to be naturally sun-dried or air-dried, The bricks after drying are put into the sintering apparatus 37, sintering is completed, and it becomes a brick for construction. The sintering quality must meet the relevant standards of GB 5101-2003 "Sintered Ordinary Bricks" and GB13544-2011 "Sintered Porous Bricks and Porous Blocks". When the water in all water-requiring process links is insufficient, tap water can be used to supplement it.

In this embodiment, the high sand content construction slag is formed into mud and sand slurry by the combined action of the coarse steel mesh separation device 13 and the high-pressure water impact separation device 12, which accelerates the dissolution of mud and sand in water, and then separates the coarse and medium-fine sand and gravel. In this way, the separation efficiency of mud, sand and stone can be improved, and the whole process can be produced continuously without waiting for the production of a certain link in the middle.

It should be understood that the above-mentioned specific embodiments of the present invention are only used to illustrate or explain the principle of the present invention, but not to limit the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the protection scope of the present invention. Furthermore, the appended claims of this invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalents of such scope and boundaries.

Claims (7)

1. The utility model provides a building dregs scene recovery system of recycling which characterized in that includes:

the sand-stone separation production line comprises a coarse steel bar separation device, a double-helix sand washing device, a coarse sand-stone screening roller device and a medium-fine sand-stone screening roller device;

the coarse steel bar separation device is used for separating building muck, screening coarse stones or mud blocks with the particle size of more than 60mm to the coarse gravel screening roller device, and screening medium-fine silt slurry with the particle size of less than 60mm to the double-helix sand washing device;

the double-helix sand washing device comprises a feed chute, a double-helix sand washing machine, a driving system and a discharge chute, wherein the feed chute, the double-helix sand washing machine, the driving system and the discharge chute are sequentially arranged;

the coarse gravel screening roller device is arranged in an inclined manner at an angle of 4-6 degrees, an inlet is positioned on the high side, an outlet is positioned on the low side, the coarse gravel screening roller device comprises a first feeding spiral blade segment, a first gravel frying and washing segment, a first round-hole sieve plate segment and a first discharging spiral blade segment, the length of the double-screw sand washing device is 12-15m, and the diameter of the double-screw sand washing device is 3.0-3.2 m;

the medium and fine sand screening roller device is arranged in an inclined manner at an angle of 5-8 degrees, an inlet is positioned on the high side, an outlet is positioned on the low side, the medium and fine sand screening roller device comprises a second feeding spiral blade segment, a second sand stir-frying and washing segment, a second round hole sieve plate segment and a second discharging spiral blade segment, the length of the medium and fine sand screening roller device is 16-18m, and the diameter of the medium and fine sand screening roller device is 2.2-2.5 m;

grit screening production line includes: the mud-rock launder is used for collecting sand, stone and muddy water mixture, the stone material washing device is used for washing the mixture and conveying the mixture to the vibration screening device, the vibration screening device is used for screening sand materials with different particle sizes,

a slurry treatment line comprising: a slurry sedimentation tank, a slurry dehydration device, a mixing device, an extrusion device and a firing device;

the mud sedimentation tank is used for collecting mud and sedimentating, the mud dewatering device is used for dewatering the mud after sedimentation, the mixing device is used for mixing silt, soil and shale materials, the extrusion device is used for extrusion molding to manufacture building bricks, and the firing device is used for sintering the building bricks.

2. The construction waste site recycling system according to claim 1, characterized in that:

the coarse mesh reinforcement separating device is obliquely arranged at an angle of 45-50 degrees, the length is 7-8m, the width is 3.5-4m, the side length of gaps of mesh meshes of the mesh reinforcement is 60mm, the diameter of transverse steel bars is 50mm, and the diameter of longitudinal steel bars is 40 mm.

3. The construction waste site recycling system according to claim 2, characterized in that:

and the transverse steel bars of the coarse steel bar net separating device are arranged above the longitudinal steel bars.

4. The construction waste site recycling system according to claim 1, characterized in that:

the double helix of the double helix sand washing device is arranged in parallel, and the rotation direction is towards the middle.

5. The construction waste site recycling system according to claim 1, characterized in that:

the bottom of the mud sedimentation tank is made of a reinforced concrete structure, and the bottom of the mud sedimentation tank is obliquely arranged towards one end.

6. The construction waste site recycling system according to claim 1, characterized in that:

the mud sedimentation tank comprises a plurality of small sedimentation tanks, and each sedimentation tank comprises a mud injection port and a dewatering pump.

7. The construction waste site recycling system according to claim 1, characterized in that:

the slurry dewatering device is a screw extrusion device.

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