CN115231861A - Method for preparing recycled aggregate concrete by using construction waste - Google Patents
Method for preparing recycled aggregate concrete by using construction waste Download PDFInfo
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- CN115231861A CN115231861A CN202210811378.4A CN202210811378A CN115231861A CN 115231861 A CN115231861 A CN 115231861A CN 202210811378 A CN202210811378 A CN 202210811378A CN 115231861 A CN115231861 A CN 115231861A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention belongs to the technical field of concrete for building materials, and particularly relates to a method for preparing recycled aggregate concrete by using building wastes, which comprises the following steps of S1, sorting the building wastes; s2, putting the rest sorted construction waste into a crusher for crushing and screening, putting the crushed mixture into water washing equipment through a closed pipeline for washing and screening; s3, collecting and collecting the aggregate formed by screening in the S2, washing with water again, and drying in the shade to form recycled aggregate; mixing and stirring the prepared recycled aggregate with a water reducing agent, broken stone, cement, water, quartz sand and powder to prepare the recycled aggregate concrete; the water washing equipment comprises a body and a screening roller; through throwing into washing equipment with the construction waste mixture after the breakage, the powder in the mixture forms mud and flows out after mixing with water, reduces the raise dust pollution in the screening process, and the solid aggregate of large granule in the mixture is sieved and is washd, increases the screening efficiency and the cleanliness factor of aggregate.
Description
Technical Field
The invention belongs to the technical field of concrete for building materials, and particularly relates to a method for preparing recycled aggregate concrete by using building wastes.
Background
A large amount of removal is accompanied in the urban building updating process, and a large amount of building garbage is formed in the removal process. The construction waste pollutes the environment and occupies a large amount of limited land, the treatment of the construction waste is a huge project, the concrete is used as a construction material with the largest use amount, the demand on resources is great, and the ecological environment is seriously damaged due to the large amount of mining of mountain bodies required by the coarse aggregate used as a concrete raw material.
The prior art also discloses some technical schemes related to concrete for building materials, for example, a Chinese patent with application number 2015108433138 discloses C30 durable recycled shaping aggregate concrete prepared by using building wastes and a preparation method thereof, the concrete is prepared by mixing cement, fly ash, mineral powder, fine aggregate, coarse aggregate, an additive and water according to a certain proportion, the fine aggregate is sand and the recycled shaping fine aggregate are mixed, the recycled shaping fine aggregate accounts for 20-100% of the total weight of the fine aggregate, the coarse aggregate is gravel and the recycled shaping coarse aggregate, and the recycled shaping coarse aggregate accounts for 20-100% of the total weight of the coarse aggregate. And crushing the construction waste and shaping the particles to obtain the recycled shaping aggregate.
However, in the prior art, the construction waste is required to be screened after being crushed through the through grooves, screening equipment usually works in an open environment, dust pollution is serious in the screening process, and meanwhile, the dust cannot be effectively recycled, so that the recovery rate of effective components of the construction waste is reduced.
Therefore, the invention provides a method for preparing recycled aggregate concrete by using construction waste.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems that the construction waste is crushed and then needs to be screened, screening equipment usually works in an open environment, dust pollution is serious in the screening process, and meanwhile, the dust cannot be effectively recycled, so that the recovery rate of effective components of the construction waste is reduced, the method for preparing the recycled aggregate concrete by using the construction waste is provided by the invention.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a method for preparing recycled aggregate concrete by using construction waste, which comprises the following steps:
s1, sorting the construction waste, removing large wood and plastic impurities contained in the construction waste, and adsorbing large exposed steel bars and iron impurities in the construction waste by matching lifting equipment with an electromagnet;
s2, putting the rest sorted construction waste into a crusher for crushing, putting the crushed mixture into washing equipment through a closed pipeline, performing dustless cleaning on powder with smaller particle diameter contained in the construction waste through a screening roller of the washing equipment, dissolving the powder into water to form slurry, driving grinding balls to crush and filter the large construction waste particles again through a rotary screening roller, and further screening the construction waste;
s3, dehydrating the slurry formed in the S2 through a plate-and-frame filter press, then drying the slurry in the air to obtain powder, then refilling the filtered water into washing equipment through a water inlet pipe, recycling the water, collecting and collecting the aggregate formed by screening in the S2, washing the aggregate again, removing sludge impurities adhered to the surface of the aggregate, and then drying the aggregate in the shade to form recycled aggregate; and mixing and stirring the prepared recycled aggregate with a water reducing agent, broken stone, cement, water, quartz sand and powder to prepare the recycled aggregate concrete.
Preferably, the water washing device comprises a body and a screening drum; the top of the body is provided with a feed hopper, the screening roller is rotatably arranged in the body and is driven to rotate by a speed reduction motor; one side of the opening of the screening roller is communicated with the feed hopper, and the other end of the screening roller is provided with a discharge hole; the bottom of the body is communicated with a discharge pipe at a position corresponding to the discharge hole; the two sides of the body are respectively communicated with a water inlet pipe and a water outlet pipe, the water inlet pipe is connected with a water pool through a water pump, and the water outlet pipe is connected with a wastewater pool through a pipeline; the water inlet pipe and the water outlet pipe are respectively positioned at the upper side and the lower side of the screening roller, and the height of the water inlet pipe is lower than that of the water outlet pipe; when the screening device is used, building garbage is crushed and then needs to be screened, screening equipment usually works in an open environment, dust pollution is serious in the screening process, meanwhile, dust cannot be effectively recycled, and the recovery rate of effective components of the building garbage is reduced.
Preferably, the screening roller is obliquely arranged, and the height of one side, close to the feed hopper, of the screening roller is higher than that of the other side; the periphery of the screening roller is fixedly connected with a shunt ring, and one side of the shunt ring is uniformly provided with a group of first bulges; a screen is arranged in the body at the bottom of the screening roller and is parallel to the axis of the screening roller; the bottom of the body is fixedly connected with a sliding seat, and the screen is positioned at the top of the sliding seat and is in sliding connection with the sliding seat; an electromagnetic valve is arranged in the discharge port, a top rod is fixedly connected to the top of the screen at a position corresponding to the shunt ring, the top rod and the shunt ring are in lap joint, and a second protrusion is fixedly connected to one side, close to the first protrusion, of the top rod; the bottom of the screen is fixedly connected with a support plate, and a spring is fixedly connected between the support plate and the sliding column; a fine material opening is formed in the body at the lower part of the screen; after screening through the screening cylinder, partly aggregate stays in the screening cylinder, another part aggregate falls on the screen cloth after screening cylinder screening, later drive splitter ring and protruding rotation No. one through the screening cylinder, constantly push up No. two protruding and ejector pins, cooperation spring makes the screen cloth constantly vibrate and carry out secondary screening, increase the screening efficiency of aggregate, remaining aggregate is collected through arranging the material pipe on the screen cloth, after the aggregate discharges completely on the screen cloth, open the solenoid valve, make the screening cylinder rotatory and arrange the material simultaneously, cooperate the fine aggregate that the fine material mouth was collected, increase the screening utilization efficiency of aggregate, the splitter ring is cut apart the rivers that the inlet tube flowed in simultaneously, increase the efficiency that rivers carried mud and discharged the body, the water inlet pipe pump that lies in the below simultaneously goes into the suspension mixing efficiency that increases the screen cloth and the interior aggregate of screening cylinder when upwards flowing after rivers, further increase the dissolution discharge efficiency of dust, increase the cleaning cleanliness factor of aggregate.
Preferably, the bottom of the supporting plate is fixedly connected with an elastic scraping blade, and the thickness of one end of the scraping blade, which is far away from the supporting plate, is smaller than that of the other end of the scraping blade; one end of the scraping blade, which is far away from the supporting plate, inclines towards the direction close to the fine material port; the scraping blade is driven to continuously hang the local bottom when the screen mesh slides in a reciprocating mode, and the discharging efficiency of the fine aggregate at the position, close to the sliding seat, of the bottom of the body is improved.
Preferably, a guide wheel is rotatably connected in a guide groove formed in the middle of the supporting plate, one side, far away from the scraping blade, of the bottom end of the supporting plate is rotatably connected with a roller through an elastic rod, and the roller abuts against the inner wall of the body and is in rolling connection with the inner wall of the body; a pull wire is wound on the roller wheel, and the other end of the pull wire bypasses the guide wheel and is fixedly connected with the end part of the scraping piece; because the screen cloth is the tilt state and constantly reciprocating sliding for the screen cloth extrudees the doctor-bar in-process that slides downwards, it draws the line to drive the running roller rotation and rolling through the rolling friction between running roller and the body this moment, and then upwards pull up the doctor-bar, reduce the pressure between doctor-bar and the body bottom, and then reduce the wearing and tearing of doctor-bar, when the cooperation screen cloth slides downwards to one side, the cavity volume between backup pad and the slide reduces, increase rivers to the discharge efficiency of body bottom fine aggregate, recoil is carried out to the screen cloth that is close to the slide position simultaneously, further reduce the jam of screen cloth.
Preferably, the periphery of the middle part of the screening roller is sleeved with a fixing ring, the fixing ring is connected with the body through a support, one side of the fixing ring is provided with a sliding groove, an arch part is arranged at the position, close to the upper part, of the sliding groove, and a sliding pin is connected in the sliding groove in a sliding mode; a group of overflow holes are uniformly distributed on the screening roller at the circumference corresponding to the fixed ring, a movable plate is arranged in each overflow hole, one end of each movable plate is hinged with the inner wall of each overflow hole through a rotating pin, and the other end of each movable plate is fixedly connected with a sliding pin through a support rod; when the sliding pin moves to the arch part, the movable plate rotates and opens the overflow hole; in the rotating process of the screening roller, when the sliding pin moves to the arch part, the movable plate rotates and opens the overflow hole, so that wood chips, foam and other plastic impurities which are insoluble in water and have density lower than that of water in the construction waste are discharged through the overflow hole, and the screening purity of the aggregate is further improved.
Preferably, the bottom of the screening roller, which is close to one side of the feed hopper, is provided with an arc-shaped frame, and the screening roller is in sliding connection with the arc-shaped frame; the arc-shaped frame is fixedly connected with the body through a water replenishing pipe; the inner periphery of the arc-shaped frame is provided with an arc-shaped groove, and the bottom of the arc-shaped groove is communicated with a water replenishing pipe through a first hole; the water replenishing pipe penetrates through the body and extends to the outside of the body, and the water replenishing pipe is communicated with the water pool through the water pump; increase through the arc frame and drive the support to the screening cylinder, when supplying water in to the arc wall through the moisturizing pipe simultaneously, pressurized water discharges through the clearance between arc frame and the screening cylinder, upwards lifts up the screening cylinder slightly for the screening cylinder suspension is on arc frame upper portion, further reduces the wearing and tearing between screening cylinder and the arc frame.
Preferably, one side of the arc-shaped groove close to the speed reduction motor is communicated with a group of spray pipes, and water outlets of the spray pipes are arranged corresponding to sieve holes of the sieving roller; the free end of the spray pipe inclines to one side close to the speed reducing motor; a crescent-shaped stop block is hinged in the spray pipe through a tension spring, and the maximum width of the stop block is less than one half of the inner diameter of the spray pipe; partial water flow through in the arc wall spouts to screening cylinder periphery through the spray tube for high-speed rivers strike the sieve mesh that corresponds the position, further reduce the jam of sieve mesh, aggregate in the rivers acceleration sieve section of thick bamboo of slope is to the efficiency of motion of discharge gate, reduces piling up of aggregate in the screening cylinder and blocks up, and rivers in the spray tube drive the dog shake and constantly strike a sieve section of thick bamboo simultaneously, further increase the efficiency of cleaing away of the impurity that blocks in the sieve mesh in the sieve section of thick bamboo.
Preferably, one side of the check block, which is far away from the tension spring, is hinged with a collision ball through an elastic connecting rod, one side of the collision ball, which is close to the check block, is fixedly connected with a horn-shaped filter cover, and the diameter of the outer edge of the filter cover is smaller than the inner diameter of the spray pipe; reduce impurity entering and block up the spray tube through tubaeform filter mantle through the spray tube, when rivers drive the filter mantle and stretch out the spray tube outside simultaneously, the turbulent flow that rivers impact filter mantle formation further increases collision ball's amplitude of fluctuation, increases collision ball to the striking cleaning efficiency of screening cylinder.
Preferably, a group of through holes are uniformly distributed at the position, close to the middle part, of the stop block, a coil spring is arranged at one side, close to the tension spring, of the stop block, and the end part of the coil spring penetrates through the through holes and is fixedly connected with the filter cover; pulling the coil spring when swinging through the filter mantle for the dog is scraped to coil spring during the diastole, the accumulation of incrustation scale and mud on reduction through-hole and the dog, the swing efficiency of dog when further increasing rivers impact the dog, and the efficiency that resets of filter mantle is increased to the coil spring simultaneously, reduces the filter mantle and blocks the outside probability that can not reset of spray tube.
The invention has the following beneficial effects:
1. the method for preparing the recycled aggregate concrete by using the construction waste comprises the steps of putting a crushed construction waste mixture into a washing device, mixing powder in the mixture with water to form slurry, enabling the slurry to flow out, screening and cleaning large-particle solid aggregates in the mixture, increasing screening efficiency and cleanliness of the aggregates, filtering water in the slurry in the washing device through a filter pressing device, drying in the shade to serve as concrete powder, increasing the recycling rate of the construction waste, reducing dust pollution and further increasing the recycling efficiency of effective components of the construction waste.
2. The invention relates to a method for preparing recycled aggregate concrete by using building wastes, which comprises the steps of screening by using a screening roller, leaving a part of aggregates in the screening roller, screening the other part of aggregates by using the screening roller, falling on a screen, driving a shunting ring and a first protrusion to rotate by using the screening roller, continuously jacking a second protrusion and an ejector rod, enabling the screen to continuously vibrate and perform secondary screening by matching with a spring, increasing the screening efficiency of the aggregates, collecting the aggregates remained on the screen by using a discharge pipe, opening an electromagnetic valve after the aggregates on the screen are completely discharged, simultaneously enabling the screening roller to rotate and discharge the aggregates by matching with fine aggregates collected by a fine material port, increasing the screening utilization efficiency of the aggregates, simultaneously dividing the water flow flowing into a water inlet pipe by using the shunting ring, increasing the efficiency of carrying mud by the water flow and discharging the aggregate out of a body, simultaneously increasing the suspension mixing efficiency of the aggregates in the screen and the screening roller when the water flow upwards after the water flow is pumped into the water inlet pipe positioned below, further increasing the dissolution discharge efficiency of the aggregates and increasing the cleaning cleanliness of dust.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
FIG. 4 is an enlarged view of a portion A of FIG. 3;
FIG. 5 is a cross-sectional view taken at B-B of FIG. 3;
FIG. 6 is an enlarged view of a portion of FIG. 3 at C;
FIG. 7 is a perspective view of the arcuate frame and nozzle of the present invention;
FIG. 8 is a schematic view of the construction of the stop block filter of the present invention;
in the figure: the device comprises a body 1, a screening roller 11, a feed hopper 12, a speed reduction motor 13, a discharge hole 14, a discharge pipe 15, a water inlet pipe 16, a water outlet pipe 17, a diverter ring 18, a first protrusion 19, a screen 2, a sliding seat 21, a top rod 22, a second protrusion 23, a support plate 24, a fine material opening 25, a scraping blade 26, a guide wheel 27, an elastic rod 28, a roller 29, a pull wire 3, a fixing ring 31, a sliding groove 32, an arch part 33, a sliding pin 34, an overflow hole 35, a movable plate 36, a support rod 37, an arc-shaped frame 4, a water replenishing pipe 41, an arc-shaped groove 42, a first hole 43, a spray pipe 44, a sieve hole 47, a tension spring 45, a stop block 46, a connecting rod 48, a collision ball 49, a filter cover 5, a through hole 51 and a coil spring 52.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example one
As shown in fig. 1 to 7, the method for preparing recycled aggregate concrete from construction waste according to the present invention comprises the following steps:
s1, sorting the construction waste, removing large wood and plastic impurities contained in the construction waste, and adsorbing large exposed steel bars and iron impurities in the construction waste by matching lifting equipment with an electromagnet;
s2, putting the sorted residual construction waste into a crusher for crushing, putting the crushed mixture into washing equipment through a closed pipeline, performing dustless cleaning on powder with smaller particle diameter contained in the construction waste through a screening roller 11 of the washing equipment, dissolving the powder in water to form slurry, and simultaneously driving grinding balls to crush and filter large construction waste particles again through a rotary screening roller 11 so as to screen the construction waste;
s3, dehydrating the slurry formed in the S2 through a plate-and-frame filter press, then drying the slurry in the air to obtain powder, then refilling the filtered water into washing equipment through a water inlet pipe 16 for recycling, collecting and collecting the aggregate formed by screening in the S2, washing the aggregate again, removing sludge impurities adhered to the surface of the aggregate, and then drying the aggregate in the shade to form recycled aggregate; and mixing and stirring the prepared recycled aggregate with a water reducing agent, broken stone, cement, water, quartz sand and powder to prepare the recycled aggregate concrete.
The water washing equipment comprises a body 1 and a screening roller 11; the top of the body 1 is provided with a feed hopper 12, the screening roller 11 is rotatably arranged inside the body 1, and the screening roller 11 is driven to rotate by a speed reduction motor 13; one side of the opening of the screening roller 11 is communicated with a feed hopper 12, and the other end of the screening roller 11 is provided with a discharge hole 14; a discharge pipe 15 is communicated with the bottom of the body 1 and corresponds to the discharge hole 14; the two sides of the body 1 are respectively communicated with a water inlet pipe 16 and a water outlet pipe 17, the water inlet pipe 16 is connected with a water pool through a water pump, and the water outlet pipe 17 is connected with a wastewater pool through a pipeline; the water inlet pipe 16 and the water outlet pipe 17 are respectively positioned at the upper side and the lower side of the screening roller 11, and the height of the water inlet pipe 16 is lower than that of the water outlet pipe 17; when the screening device is used, building garbage is crushed and then needs to be screened, screening equipment usually works in an open environment, dust pollution is serious in the screening process, meanwhile, dust cannot be effectively recycled, and the recovery rate of effective components of the building garbage is reduced.
The screening roller 11 is obliquely arranged, and the height of one side, close to the feed hopper 12, of the screening roller 11 is higher than that of the other side; the periphery of the screening roller 11 is fixedly connected with a shunt ring 18, and one side of the shunt ring 18 is uniformly provided with a group of first bulges 19; a screen 2 is arranged in the body 1 at the bottom of the screening roller 11, and the screen 2 is arranged in parallel with the axis of the screening roller 11; the bottom of the body 1 is fixedly connected with a sliding seat 21, and the screen 2 is positioned at the top of the sliding seat 21 and is in sliding connection with the sliding seat 21; an electromagnetic valve is arranged in the discharge port 14, a top of the screen 2 is fixedly connected with a push rod 22 corresponding to the diverter ring 18, the push rod 22 is in lap joint with the diverter ring 18, and one side of the push rod 22, which is close to the first protrusion 19, is fixedly connected with a second protrusion 23; the bottom of the screen 2 is fixedly connected with a support plate 24, and a spring is fixedly connected between the support plate 24 and the sliding column; a fine material port 25 is formed in the body 1 at the lower part of the screen 2; after screening through screening cylinder 11, a part of aggregate remains in screening cylinder 11, another part of aggregate drops on screen cloth 2 after screening through screening cylinder 11, later drive diverter ring 18 and a protruding 19 rotation through screening cylinder 11, constantly push up No. two protruding 23 and ejector pin 22, cooperation spring makes screen cloth 2 constantly vibrate and carry out secondary screening, increase the screening efficiency of aggregate, remaining aggregate is collected through arranging material pipe 15 on screen cloth 2, after the aggregate is discharged completely on screen cloth 2, open the solenoid valve, make screening cylinder 11 rotatory and arrange the material simultaneously, cooperate the fine aggregate that fine material mouth 25 was collected, increase the screening utilization efficiency of aggregate, diverter ring 18 cuts apart the rivers that inlet tube 16 flowed in simultaneously, increase the efficiency that rivers carried mud and discharged body 1, the inlet tube 16 who is located the below increases the suspension mixing efficiency of aggregate in screen cloth 2 and screening cylinder 11 when upwards flowing after the pump-in rivers simultaneously, further increase the dissolution discharge efficiency of dust, increase the cleaning cleanliness factor of aggregate.
The bottom of the supporting plate 24 is fixedly connected with an elastic scraping blade 26, and the thickness of one end, far away from the supporting plate 24, of the scraping blade 26 is smaller than that of the other end; one end of the scraping blade 26, which is far away from the supporting plate 24, inclines towards the direction close to the fine material opening 25; the scraping blade 26 is driven to continuously hang the local bottom when the screen 2 slides back and forth, so that the discharge efficiency of the fine aggregate at the position, close to the sliding seat 21, of the bottom of the body 1 is improved.
A guide wheel 27 is rotatably connected in a guide groove formed in the middle of the supporting plate 24, one side of the bottom end of the supporting plate 24, which is far away from the scraping blade 26, is rotatably connected with a roller 29 through an elastic rod 28, and the roller 29 abuts against the inner wall of the body 1 and is in rolling connection with the inner wall of the body 1; the roller 29 is wound with a pull wire 3, and the other end of the pull wire 3 bypasses the guide wheel 27 and is fixedly connected with the end part of the scraping blade 26; because the screen cloth 2 is the tilt state and constantly reciprocates and slides for screen cloth 2's the in-process extrusion doctor-bar 26 that slides downwards, drive running roller 29 rotation and rolling wire 3 that draws through the rolling friction between running roller 29 and the body 1 this moment, and then upwards pull up doctor-bar 26, reduce the pressure between doctor-bar 26 and the body 1 bottom, and then reduce the wearing and tearing of doctor-bar 26, when cooperation screen cloth 2 slides downwards to one side, the cavity volume between backup pad 24 and the slide 21 reduces, increase the discharge efficiency of rivers to the fine aggregate in body 1 bottom, carry out the recoil to screen cloth 2 near slide 21 position simultaneously, further reduce the jam of screen cloth 2.
The periphery of the middle part of the screening roller 11 is sleeved with a fixing ring 31, the fixing ring 31 is connected with the body 1 through a support, one side of the fixing ring 31 is provided with a sliding chute 32, the position, close to the upper part, of the sliding chute 32 is provided with an arched part 33, and a sliding pin 34 is connected in the sliding chute 32 in a sliding manner; a group of overflow holes 35 are uniformly distributed on the circumference of the screening roller 11 at the position corresponding to the fixed ring 31, a movable plate 36 is arranged in each overflow hole 35, one end of each movable plate 36 is hinged with the inner wall of each overflow hole 35 through a rotating pin, and the other end of each movable plate 36 is fixedly connected with a sliding pin 34 through a support rod 37; when the sliding pin 34 moves to the arch part 33, the movable plate 36 rotates and opens the overflow hole 35; during the rotation of the screening drum 11, when the sliding pin 34 moves to the arch part 33, the movable plate 36 rotates and opens the overflow hole 35, so that the wood chips, foams and other plastic impurities which are insoluble in water and have density lower than that of water in the construction waste are discharged through the overflow hole 35, and the screening purity of the aggregates is further improved.
The bottom of the screening roller 11, which is close to one side of the feed hopper 12, is provided with an arc-shaped frame 4, and the screening roller 11 is in sliding connection with the arc-shaped frame 4; the arc-shaped frame 4 is fixedly connected with the body 1 through a water replenishing pipe 41; an arc-shaped groove 42 is formed in the inner periphery of the arc-shaped frame 4, and the bottom of the arc-shaped groove 42 is communicated with the water replenishing pipe 41 through a first hole 43; the water replenishing pipe 41 penetrates through the body 1 and extends to the outside of the body 1, and the water replenishing pipe 41 is communicated with a water pool through a water pump; increase through arc frame 4 and drive the support to screening cylinder 11, when supplying water to arc 42 in through moisturizing pipe 41 simultaneously, pressure water discharges through the clearance between arc frame 4 and the screening cylinder 11, lifts up screening cylinder 11 slightly upwards for screening cylinder 11 suspends on arc frame 4 upper portion, further reduces the wearing and tearing between screening cylinder 11 and the arc frame 4.
One side of the arc-shaped groove 42 close to the speed reducing motor 13 is communicated with a group of spray pipes 44, and the water outlets of the spray pipes 44 are arranged corresponding to the sieve holes 47 of the sieving roller 11; the free end of the spray pipe 44 inclines to one side close to the speed reducing motor 13; a crescent-shaped stop block 46 is hinged in the spray pipe 44 through a tension spring 45, and the maximum width of the stop block 46 is less than one half of the inner diameter of the spray pipe 44; partial water flow in the arc-shaped groove 42 is sprayed out of the periphery of the screening roller 11 through the spray pipe 44, so that high-speed water flow impacts the screen holes 47 at the corresponding positions, the blockage of the screen holes 47 is further reduced, the movement efficiency of aggregate in the screening roller 11 to the discharge hole 14 is accelerated by inclined water flow, the accumulation and congestion of aggregate in the screening roller 11 are reduced, meanwhile, the water flow in the spray pipe 44 drives the stop block 46 to shake and continuously impact the screening roller 11, and the clearing efficiency of impurities blocked in the screen holes 47 in the screening roller 11 is further improved.
Example two
As shown in fig. 8, a first comparative example, in which another embodiment of the present invention is:
one side of the stop block 46, which is far away from the tension spring 45, is hinged with an impact ball 49 through an elastic connecting rod 48, one side of the impact ball 49, which is close to the stop block 46, is fixedly connected with a horn-shaped filter cover 5, and the diameter of the outer edge of the filter cover 5 is smaller than the inner diameter of the spray pipe 44; impurity entering and blocking of the spray pipe 44 are reduced through the horn-shaped filter cover 5 through the spray pipe 44, and meanwhile when the filter cover 5 is driven by water flow to extend out of the spray pipe 44, the turbulent flow formed by water flow impacting the filter cover 5 further increases the swing amplitude of the collision ball 49, and the collision cleaning efficiency of the collision ball 49 on the screening roller 11 is increased.
A group of through holes 51 are uniformly distributed at the position, close to the middle part, of the stop block 46, a coil spring 52 is arranged at one side, close to the tension spring 45, of the stop block 46, and the end part of the coil spring 52 penetrates through the through holes 51 and then is fixedly connected with the filter cover 5; the coil spring 52 is pulled when the filter cover 5 swings, so that the coil spring 52 scrapes the stop block 46 when relaxing, accumulation of scale and sludge on the through hole 51 and the stop block 46 is reduced, the swinging efficiency of the stop block 46 when water flow impacts the stop block 46 is further increased, meanwhile, the coil spring 52 increases the resetting efficiency of the filter cover 5, and the probability that the filter cover 5 is clamped outside the spray pipe 44 and cannot be reset is reduced.
When the device works, the crushed mixture of the construction waste is put into a washing device, slurry is formed and flows out after powder in the mixture is mixed with water, large-particle solid aggregate in the mixture is screened and cleaned, the screening efficiency and cleanliness of the aggregate are increased, meanwhile, the slurry in the washing device is dried in the shade as concrete powder after water in the slurry is filtered by a filter pressing device, the recycling rate of the construction waste is increased, dust pollution is reduced, and the recycling efficiency of effective components of the construction waste is further increased; after screening by the screening roller 11, a part of aggregates are left in the screening roller 11, the other part of aggregates are screened by the screening roller 11 and then fall on the screen 2, then the screening roller 11 drives the diverter ring 18 and the first protrusion 19 to rotate, the second protrusion 23 and the ejector rod 22 are continuously pushed, the screen 2 is continuously vibrated and secondary screening is carried out by matching with a spring, the screening efficiency of the aggregates is increased, the aggregates remained on the screen 2 are collected by the discharge pipe 15, after the aggregates on the screen 2 are completely discharged, the electromagnetic valve is opened, the screening roller 11 is simultaneously rotated and discharged, the fine aggregates collected by the fine material opening 25 are matched, the screening utilization efficiency of the aggregates is increased, meanwhile, the diverter ring 18 divides the water flow flowing in the water inlet pipe 16, the efficiency of carrying slurry by the water flow and discharging the body 1 is increased, meanwhile, the suspension mixing efficiency of the aggregates in the screen 2 and the screening roller 11 is increased when the water flow upwards after the water flow is pumped by the water inlet pipe 16 positioned below, the dissolution discharging efficiency of the aggregates is further increased, and the cleaning cleanliness of the aggregates is increased; the scraping blade 26 is driven to continuously hang the local bottom when the screen 2 slides back and forth, so that the discharge efficiency of the fine aggregate at the position, close to the sliding seat 21, of the bottom of the body 1 is improved; because the screen 2 is in an inclined state and continuously slides in a reciprocating manner, the scraping blade 26 is extruded in the downward sliding process of the screen 2, at the moment, the roller 29 is driven to rotate and wind the stay wire 3 through rolling friction between the roller 29 and the body 1, the scraping blade 26 is further pulled upwards, the pressure between the scraping blade 26 and the bottom of the body 1 is reduced, the abrasion of the scraping blade 26 is further reduced, and when the screen 2 slides obliquely downwards, the volume of a cavity between the support plate 24 and the sliding seat 21 is reduced, so that the discharge efficiency of water flow to fine aggregate at the bottom of the body 1 is increased, and meanwhile, the screen 2 close to the sliding seat 21 is backflushed, so that the blockage of the screen 2 is further reduced; in the rotation process of the screening roller 11, when the sliding pin 34 moves to the arch part 33, the movable plate 36 rotates and opens the overflow hole 35, so that sawdust, foam and other plastic impurities which are insoluble in water and have density lower than that of water in the construction waste are discharged through the overflow hole 35, and the screening purity of the aggregate is further improved; the screening roller 11 is additionally supported by the arc-shaped frame 4, and when water is supplied to the arc-shaped groove 42 through the water replenishing pipe 41, pressure water is discharged through a gap between the arc-shaped frame 4 and the screening roller 11, and the screening roller 11 is slightly lifted upwards, so that the screening roller 11 is suspended at the upper part of the arc-shaped frame 4, and the abrasion between the screening roller 11 and the arc-shaped frame 4 is further reduced; partial water flow in the arc-shaped groove 42 is sprayed out of the periphery of the screening roller 11 through the spray pipe 44, so that high-speed water flow impacts the screen holes 47 at the corresponding positions, the blockage of the screen holes 47 is further reduced, the movement efficiency of aggregate in the screening roller 11 to the discharge hole 14 is accelerated by inclined water flow, the accumulation and congestion of aggregate in the screening roller 11 are reduced, meanwhile, the water flow in the spray pipe 44 drives the stop block 46 to shake and continuously impact the screening roller 11, and the clearing efficiency of impurities blocked in the screen holes 47 in the screening roller 11 is further improved.
The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A method for preparing recycled aggregate concrete by using construction waste is characterized by comprising the following steps: the method comprises the following steps:
s1, sorting the construction waste, removing large wood and plastic impurities contained in the construction waste, and adsorbing large exposed steel bars and iron impurities in the construction waste by matching lifting equipment with an electromagnet;
s2, putting the rest construction waste after sorting into a crusher for crushing, putting the crushed mixture into washing equipment through a closed pipeline, performing dustless cleaning on powder with smaller particle diameter contained in the construction waste through a screening roller (11) of the washing equipment, dissolving the powder in water to form slurry, and simultaneously driving grinding balls to crush and filter large construction waste particles again through a rotary screening roller (11) so as to screen the construction waste;
s3, dehydrating the slurry formed in the S2 through a plate-and-frame filter press, then drying the slurry in the air to obtain powder, then refilling the filtered water into washing equipment through a water inlet pipe (16), recycling the water, collecting and collecting the aggregate formed by screening in the S2, washing the aggregate again, removing sludge impurities adhered to the surface of the aggregate, and then drying the aggregate in the shade to form recycled aggregate; and mixing and stirring the prepared recycled aggregate with a water reducing agent, broken stones, cement, water, quartz sand and powder to prepare the recycled aggregate concrete.
2. The method for preparing recycled aggregate concrete from construction waste according to claim 1, wherein the method comprises the following steps: the water washing equipment comprises a body (1) and a screening roller (11); the top of the body (1) is provided with a feed hopper (12), the screening roller (11) is rotatably installed inside the body (1), and the screening roller (11) is driven to rotate by a speed reducing motor (13); one side of the opening of the screening roller (11) is communicated with the feed hopper (12), and the other end of the screening roller (11) is provided with a discharge hole (14); a discharge pipe (15) is communicated with the bottom of the body (1) and the position corresponding to the discharge hole (14); the water purifier is characterized in that two sides of the body (1) are respectively communicated with a water inlet pipe (16) and a water outlet pipe (17), the water inlet pipe (16) is connected with a water pool through a water pump, and the water outlet pipe (17) is connected with a wastewater pool through a pipeline; the water inlet pipe (16) and the water outlet pipe (17) are respectively positioned at the upper side and the lower side of the screening roller (11), and the height of the water inlet pipe (16) is lower than that of the water outlet pipe (17).
3. The method for preparing recycled aggregate concrete from construction waste according to claim 2, wherein the method comprises the following steps: the screening roller (11) is obliquely arranged, and the height of one side, close to the feed hopper (12), of the screening roller (11) is higher than that of the other side; the periphery of the screening roller (11) is fixedly connected with a shunt ring (18), and one side of the shunt ring (18) is uniformly provided with a group of first bulges (19); a screen (2) is arranged in the body (1) at the bottom of the screening roller (11), and the screen (2) and the axis of the screening roller (11) are arranged in parallel; the bottom of the body (1) is fixedly connected with a sliding seat (21), and the screen (2) is positioned at the top of the sliding seat (21) and is in sliding connection with the sliding seat (21); an electromagnetic valve is arranged in the discharge port (14), a push rod (22) is fixedly connected to the top of the screen (2) and the corresponding position of the diverter ring (18), the push rod (22) is in lap joint with the diverter ring (18), and a second protrusion (23) is fixedly connected to one side, close to the first protrusion (19), of the push rod (22); the bottom of the screen (2) is fixedly connected with a support plate (24), and a spring is fixedly connected between the support plate (24) and the sliding column; a fine material opening (25) is formed in the body (1) at the lower part of the screen (2).
4. The method for preparing recycled aggregate concrete from construction waste according to claim 3, wherein the method comprises the following steps: the bottom of the supporting plate (24) is fixedly connected with an elastic scraping blade (26), and the thickness of one end, far away from the supporting plate (24), of the scraping blade (26) is smaller than that of the other end of the scraping blade; one end of the scraping blade (26) far away from the supporting plate (24) inclines towards the direction close to the fine material opening (25).
5. The method for preparing recycled aggregate concrete by using construction waste according to claim 4, wherein the method comprises the following steps: a guide wheel (27) is rotatably connected in a guide groove formed in the middle of the supporting plate (24), one side, far away from the scraping blade (26), of the bottom end of the supporting plate (24) is rotatably connected with a roller (29) through an elastic rod (28), and the roller (29) abuts against the inner wall of the body (1) and is in rolling connection with the inner wall of the body (1); the roller (29) is wound with a pull wire (3), and the other end of the pull wire (3) bypasses the guide wheel (27) and then is fixedly connected with the end part of the scraping blade (26).
6. The method for preparing recycled aggregate concrete from construction waste according to claim 1, wherein the method comprises the following steps: the screening drum is characterized in that a fixing ring (31) is sleeved on the periphery of the middle of the screening drum (11), the fixing ring (31) is connected with the body (1) through a support, a sliding groove (32) is formed in one side of the fixing ring (31), an arch portion (33) is arranged at the position, close to the upper portion, of the sliding groove (32), and a sliding pin (34) is connected in the sliding groove (32) in a sliding mode; a group of overflow holes (35) are uniformly distributed on the screening roller (11) at the circumference of the position corresponding to the fixed ring (31), a movable plate (36) is arranged in each overflow hole (35), one end of each movable plate (36) is hinged with the inner wall of each overflow hole (35) through a rotating pin, and the other end of each movable plate (36) is fixedly connected with a sliding pin (34) through a support rod (37); when the sliding pin (34) moves to the arch part (33), the movable plate (36) rotates and opens the overflow hole (35).
7. The method for preparing recycled aggregate concrete from construction waste according to claim 1, wherein the method comprises the following steps: the bottom of one side, close to the feed hopper (12), of the screening roller (11) is provided with an arc-shaped frame (4), and the screening roller (11) is in sliding connection with the arc-shaped frame (4); the arc-shaped frame (4) is fixedly connected with the body (1) through a water replenishing pipe (41); an arc-shaped groove (42) is formed in the inner periphery of the arc-shaped frame (4), and the bottom of the arc-shaped groove (42) is communicated with a water replenishing pipe (41) through a first hole (43); the water replenishing pipe (41) penetrates through the body (1) and extends to the outside of the body (1), and the water replenishing pipe (41) is communicated with the water pool through a water pump.
8. The method for preparing recycled aggregate concrete from construction waste according to claim 7, wherein the method comprises the following steps: one side of the arc-shaped groove (42) close to the speed reducing motor (13) is communicated with a group of spray pipes (44), and water outlets of the spray pipes (44) are arranged corresponding to the sieve holes (47) of the sieving roller (11); the free end of the spray pipe (44) inclines to one side close to the speed reducing motor (13); a crescent-shaped stop block (46) is hinged in the spray pipe (44) through a tension spring (45), and the maximum width of the stop block (46) is smaller than one half of the inner diameter of the spray pipe (44).
9. The method for preparing recycled aggregate concrete from construction waste according to claim 8, wherein the method comprises the following steps: one side of the stop block (46) far away from the tension spring (45) is hinged with a collision ball (49) through an elastic connecting rod (48), one side of the collision ball (49) close to the stop block (46) is fixedly connected with a horn-shaped filter cover (5), and the diameter of the outer edge of the filter cover (5) is smaller than the inner diameter of the spray pipe (44).
10. The method for preparing recycled aggregate concrete from construction waste according to claim 9, wherein the method comprises the following steps: a group of through holes (51) are uniformly distributed at the position, close to the middle, of the stop block (46), a coil spring (52) is arranged at one side, close to the tension spring (45), of the stop block (46), and the end part of the coil spring (52) penetrates through the through holes (51) and then is fixedly connected with the filter cover (5).
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| CN210411444U (en) * | 2019-05-23 | 2020-04-28 | 宿迁市华益混凝土有限公司 | A screening shaking table for recycled concrete production |
| CN113663902A (en) * | 2021-08-25 | 2021-11-19 | 浙江三门永泰建材有限公司 | Recycled concrete aggregate screening system |
| CN114309015A (en) * | 2022-01-29 | 2022-04-12 | 张宗楼 | Building decoration garbage co-processing technology without manual sorting |
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| JP2004181414A (en) * | 2002-12-05 | 2004-07-02 | Kurimoto Ltd | Crushed stone washing apparatus |
| CN104844042A (en) * | 2015-04-13 | 2015-08-19 | 张宗楼 | Concrete aggregate shaping method |
| CN205099585U (en) * | 2015-10-28 | 2016-03-23 | 刘中维 | Screening belt cleaning device is smashed to recycled concrete aggregate |
| JP2018094493A (en) * | 2016-12-12 | 2018-06-21 | 小牧工業株式会社 | Production method of recycled aggregate |
| CN107930828A (en) * | 2017-11-30 | 2018-04-20 | 张宗楼 | A kind of building waste removes the cleaning treatment technology of light weight sundries |
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