CN118384963A - Recycling device and method for construction engineering waste - Google Patents

Abstract

The invention relates to the technical field of construction waste recycling equipment, and provides a recycling device and method of construction waste. In the using process, the metal waste in the waste is conveniently separated through the crushing roller and the crushing blade, meanwhile, the metal waste is conveniently collected by utilizing the collecting frame, meanwhile, the electric collecting frame of the first linkage assembly moves left and right in a reciprocating manner, so that the engineering waste is prevented from accumulating in the collecting frame, and the spraying head of the second linkage assembly and the swinging assembly in a driving swinging state is used for spraying mist to dust floating out of the feed inlet, so that the influence of the dust on the working environment is effectively avoided.

Description

A device and method for recycling construction waste

Technical Field

The invention relates to the technical field of construction waste recycling equipment, and in particular to a construction waste recycling device and method.

Background technique

Construction waste refers to the slag, abandoned soil, abandoned materials, residual mud and other wastes generated during the construction, laying, demolition and repair of various buildings, structures, pipelines, etc. by construction units or individuals. With the acceleration of industrialization and urbanization, the construction industry has also developed rapidly, and the resulting construction waste is increasing.

In the prior art, a Chinese patent with publication number "CN115155711A" discloses a construction waste recycling device, which can realize the crushing and filtering recovery of construction waste through the cooperation of a crushing roller and a filter screen, thereby improving the waste recovery efficiency, reducing the use cost, and saving the recovery time. At the same time, the motor provides power, which can drive the roller to roll along the filter screen, and then under the action of the spring force, one end of the filter screen swings up and down, thereby improving the filtering effect, bringing convenience to use, and solving the problems of the existing manual separation and selection of construction waste being too time-consuming and labor-intensive, and the stacking of construction waste causing a greater threat to the health of the workers during the selection, and the manual selection being time-consuming and labor-intensive, low in efficiency, and low in recovery rate, which brings inconvenience to the recycling of construction waste.

However, the existing technology still has major deficiencies, such as:

There will be different types of garbage in construction waste. In order to facilitate the processing of these garbage, they are usually crushed and separated to be selected. Since manual selection is troublesome and impolite, the garbage will be recycled through special recycling devices. At present, most recycling devices usually use inclined grid plates to filter the waste after crushing the construction waste, and set magnets on the grid plates to adsorb the metal in the waste, so as to achieve the separation of construction waste. However, the crushed garbage flows downward by gravity. When too much metal waste is adsorbed on the grid plate, the rest of the garbage will be intercepted by too much metal waste, which will cause excessive garbage to cause blockage in the device.

Summary of the invention

The purpose of the present invention is to provide a device and method for recycling construction waste to solve the problems raised in the above background technology.

To achieve the above object, the present invention provides the following technical solutions:

A construction waste recycling device comprises a box body, the interior of the box body is divided into a crushing chamber and a collecting chamber, a through slot is arranged between the crushing chamber and the collecting chamber, a crushing assembly is arranged inside the crushing chamber, and the construction waste is crushed by the crushing assembly;

The box body is fixedly mounted with a first driving motor, an output end of the first driving motor is fixedly mounted with a rotating shaft, a crushing blade is mounted on the rotating shaft, the crushing blade is located inside the through slot, a collecting frame is arranged inside the collecting chamber, and the collecting frame is located below the through slot outlet;

The upper end surface of the box body is provided with a feed port, and a dust removal component is provided above the feed port, through which the dust generated by the crushing component is cleaned.

Preferably, the crushing assembly includes a mounting plate, a first crushing roller and a second crushing roller, the mounting plate is mounted on a box body, the first crushing roller and the second crushing roller are symmetrically mounted inside a crushing chamber, a second driving motor is fixedly mounted on the mounting plate, a first pulley is fixedly mounted on the output shaft of the second driving motor, a connecting shaft is fixedly mounted on the first crushing roller and the second crushing roller, a second pulley and a driving gear are fixedly mounted on the first crushing roller via the connecting shaft, a driven gear is fixedly mounted on the second crushing roller via the connecting shaft, the driving gear is meshed with the driven gear 2, and the first pulley is transmitted to the second pulley via a transmission belt 1.

Preferably, a linkage component 1 is provided inside the collection chamber, and the linkage component 1 includes a bidirectional thread and a positioning plate, the bidirectional thread is provided on the rotating shaft, the positioning plate is installed on the side end surface of the collection frame, the positioning plate is movably installed on the bidirectional thread, and a crescent pin is movably installed on the positioning plate.

Preferably, the dust removal assembly comprises a water tank, the water tank is mounted on the box body, a water pump is fixedly mounted on the water tank, and an output end of the water pump is connected to a drain pipe.

Preferably, a linkage component 2 is installed on the box body, and the linkage component 2 includes a third pulley and two symmetrically arranged positioning side plates, the two positioning side plates are installed on the upper end surface of the box body, the third pulley is installed on the output shaft of the second drive motor, the position of the third pulley is outside the first pulley, a driving shaft is rotatably installed on the positioning side plate, a fourth pulley and a driving gear are fixedly installed on the driving shaft, and the third pulley and the fourth pulley are driven by a transmission belt 2.

Preferably, a swing assembly is provided on the positioning side plate, and the swing assembly includes a connecting shaft, and the connecting shaft is rotatably mounted on the positioning side plate, a shunt pipe is fixedly mounted on one end of the connecting shaft, a half gear and a reset torsion spring are fixedly mounted on the connecting shaft, and the reset torsion spring is mounted on the positioning side plate at one end away from the connecting shaft, and the half gear is meshed with the driving gear.

Preferably, a spray head is provided on the diverter pipe, the diverter pipe is connected to a connecting pipe, one end of the connecting pipe away from the diverter pipe is connected to a telescopic hose, and one end of the telescopic hose away from the connecting pipe is connected to a drain pipe.

Preferably, a sliding groove is provided at the inner top of the collecting chamber, and the upper end surface of the positioning plate is slidably mounted on the inner top of the sliding groove.

Preferably, a stabilizing plate is fixedly mounted on the box body, and one end of the connecting shaft away from the first crushing roller is rotatably mounted on the stabilizing plate.

A method for using a construction waste recycling device, based on the above-mentioned construction waste recycling device, comprises the following steps:

S1. When in use, the construction waste to be recycled is put into the crushing chamber through the feed port, and the waste is crushed by two crushing rollers in the crushing assembly. The crushed waste will fall into the collection chamber through the through slot. When the crushed waste passes through the through slot, the crushing blades are driven by the first driving motor to crush the waste for the second time;

S2. The crushed waste will fall into the collection frame, and the metal objects in the waste will be collected by the collection frame, and other waste will fall into the bottom of the collection chamber through the mesh of the collection frame. At the same time, the first driving motor will drive the collection frame to reciprocate left and right while driving the crushing blades to rotate, so as to prevent the waste from accumulating in the collection frame through the movement of the collection frame;

S3. When the crushing roller crushes the waste, the water in the water tank is sprayed out through the spray head by the water pump, and the spray head on the diversion pipe is driven to swing at an angle through the linkage component 2 and the swing component, so that the spray head sprays the mist water into the dust floating out from the feed port.

Compared with the prior art, the present invention has the following beneficial effects:

1. In the present invention, the waste is firstly crushed by two crushing rollers in the crushing assembly, and the crushed waste falls into the collecting chamber through the through slot. When the crushed waste passes through the through slot, the crushing blades are driven by the first driving motor to crush the waste for the second time. The two crushings make the waste crushing effect better, so that the metal waste in the waste is separated easily, and the practicality of the recycling device is improved;

2. In the present invention, the waste falling into the collection chamber is filtered by the collection frame, the metal objects in the waste will be collected by the collection frame, and other waste will fall into the bottom of the collection chamber through the mesh of the collection frame. At the same time, the first driving motor drives the collection frame to reciprocate left and right while driving the crushing blades to rotate, and the movement of the collection frame prevents the waste from accumulating in the collection frame;

3. In the present invention, when the crushing roller crushes the waste, dust will float out from the feed bin, and the water in the water tank is sprayed out through the spray head by the water pump, and the spray head on the diversion pipe is driven to swing at an angle through the linkage component 2 and the swing component, so that the spray head can evenly spray the mist water on the dust floating out from the feed port, effectively preventing the dust from affecting the working environment around the box.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is a second schematic diagram of the overall structure of the present invention;

FIG3 is a third schematic diagram of the overall structure of the present invention;

FIG4 is a schematic diagram of the internal structure of the box body in the present invention;

FIG5 is a schematic diagram of the structure of a crushing assembly in the present invention;

FIG6 is a schematic diagram of the structure of the collection frame of the present invention;

FIG. 7 is a schematic diagram of the structure of the meshing of the driving gear and the half gear in the present invention.

In the figure: 1, box body; 2, crushing chamber; 3, collecting chamber; 4, through groove; 5, first driving motor; 6, rotating shaft; 7, crushing blade; 8, collecting frame; 9, feeding port; 10, mounting plate; 11, first crushing roller; 12, second crushing roller; 13, second driving motor; 14, first pulley; 15, connecting shaft; 16, second pulley; 17, driving gear; 18, driven gear; 19, two-way thread; 20, positioning plate; 21, crescent pin; 22, water tank; 23, water pump; 24, drain pipe; 25, third pulley; 26, positioning side plate; 27, driving shaft; 28, fourth pulley; 29, driving gear; 30, connecting shaft; 31, shunt pipe; 32, half gear; 33, reset torsion spring; 34, spray head; 35, connecting pipe; 36, telescopic hose; 37, sliding groove; 38, stable fixing plate.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Please refer to Figures 1-7, the present invention provides a technical solution:

Embodiment 1:

Please refer to Figures 1-4 and 5. A recycling device for construction waste includes a box body 1. A support seat is installed on the lower end surface of the box body 1. A discharge port is provided at the inner bottom of the box body 1. The discharge port is convenient for discharging crushed dust. The side end surface of the box body 1 is used to install a controller, and the electrical equipment in the device is controlled by the controller. This technology is a conventional technical means in this field and is not described in detail here. A box door is installed on the box body 1. The box door is convenient for removing the collection frame 8 installed on the positioning plate 20, so as to facilitate the removal of the metal waste collected in the collection frame 8. A stable fixing plate 38 is fixedly installed on the box body 1. The end of the connecting shaft 15 away from the first crushing roller 11 is rotatably installed on the stable fixing plate 38. The interior of the box body 1 is divided into a crushing chamber 2 and a collecting chamber 3. A through groove 4 is provided between the crushing chamber 2 and the collecting chamber 3. A crushing assembly is provided inside the crushing chamber 2, and construction waste is crushed by the crushing assembly.

The crushing assembly includes a mounting plate 10, a first crushing roller 11 and a second crushing roller 12, the mounting plate 10 is mounted on the box body 1, the first crushing roller 11 and the second crushing roller 12 are symmetrically mounted inside the crushing chamber 2, a second drive motor 13 is fixedly mounted on the mounting plate 10, a first pulley 14 is fixedly mounted on the output shaft of the second drive motor 13, a connecting shaft 15 is fixedly mounted on the first crushing roller 11 and the second crushing roller 12, and the two connecting shafts 15 extend to the outside of the box body 1 away from one end of the first crushing roller 11 and the second crushing roller 12, and the first crushing roller 11 is fixedly mounted on the output shaft of the second drive motor 13. The crushing roller 11 is fixedly installed with a second pulley 16 and a driving gear 17 through a connecting shaft 15, the second crushing roller 12 is fixedly installed with a driven gear 18 through the connecting shaft 15, the driving gear 17 and the driven gear 18 are meshed, the first pulley 14 is transmitted with the second pulley 16 through a transmission belt 1, the box body 1 is fixedly installed with a first driving motor 5, the output end of the first driving motor 5 is fixedly installed with a rotating shaft 6, a crushing blade 7 is installed on the rotating shaft 6, the crushing blade 7 is inside the through groove 4, and the engineering waste is secondary crushed by the crushing blade 7.

In this embodiment, the waste is crushed for the first time by two crushing rollers in the crushing assembly, and the crushed waste will fall into the collecting chamber 3 through the through groove 4. When the crushed waste passes through the through groove 4, the crushing blades 7 are driven by the first driving motor 5 to crush the waste for the second time. The waste crushing effect is better through the two crushings, which makes it easier to separate the metal waste in the waste, thereby improving the practicality of the recycling device.

Embodiment 2:

Please refer to Figures 1-4 and 6. On the basis of Example 1, in order to avoid the inability to separate metal waste from engineering waste, a collecting frame 8 is used to avoid this phenomenon. A collecting frame 8 is arranged inside the collecting chamber 3, and the collecting frame 8 is located below the outlet of the through groove 4. A linkage component 1 is arranged inside the collecting chamber 3. The linkage component 1 includes a bidirectional thread 19 and a positioning plate 20. The bidirectional thread 19 is arranged on the rotating shaft 6, and the positioning plate 20 is installed on the side end surface of the collecting frame 8. The positioning plate 20 is movably installed on the bidirectional thread 19. The positioning plate 20 is installed on the collecting frame 8 by fastening bolts. A crescent pin 21 is movably installed on the positioning plate 20, and the crescent pin 21 is used to make the positioning plate 20 slide back and forth on the bidirectional thread 19. A sliding groove 37 is arranged on the inner top of the collecting chamber 3, and the upper end surface of the positioning plate 20 is slidably installed on the inner top of the sliding groove 37. The sliding groove 37 ensures the stability of the positioning plate 20 during movement, and there will be no positional displacement.

In this embodiment, the waste material falling into the collecting chamber 3 is filtered through the collecting frame 8, the metal objects in the waste material will be collected by the collecting frame 8, and other waste material will fall into the bottom of the collecting chamber 3 through the mesh of the collecting frame 8. At the same time, the first driving motor 5 will drive the collecting frame 8 to reciprocate left and right while driving the crushing blade 7 to rotate, so as to prevent the waste material from accumulating in the collecting frame 8 through the movement of the collecting frame 8.

Embodiment three:

Please refer to Figures 1-4 and 7. On the basis of the first embodiment, in order to prevent the crushing roller from causing dust to float out from the feed port 9 when crushing the waste, a dust removal component is used to prevent this phenomenon from happening. The upper end surface of the box body 1 is provided with a feed port 9, and a dust removal component is provided above the feed port 9. The dust generated by the crushing component is cleaned by the dust removal component. The dust removal component includes a water tank 22, which is installed on the box body 1. A water pump 23 is fixedly installed on the water tank 22, and the output end of the water pump 23 is connected to a drain pipe 24;

A linkage assembly 2 is installed on the box body 1, and the linkage assembly 2 includes a third pulley 25 and two symmetrically arranged positioning side plates 26. The two positioning side plates 26 are installed on the upper end surface of the box body 1. The third pulley 25 is installed on the output shaft of the second drive motor 13. The position of the third pulley 25 is outside the first pulley 14. A driving shaft 27 is rotatably installed on the positioning side plate 26, and a fourth pulley 28 and a driving gear 29 are fixedly installed on the driving shaft 27. The third pulley 25 and the fourth pulley 28 are driven by a transmission belt 2.

A swing assembly is provided on the positioning side plate 26, and the swing assembly includes a connecting shaft 30, which is rotatably mounted on the positioning side plate 26, a shunt pipe 31 is fixedly mounted on one end of the connecting shaft 30, a half gear 32 and a reset torsion spring 33 are fixedly mounted on the connecting shaft 30, and the reset torsion spring 33 is installed on the positioning side plate 26 at one end away from the connecting shaft 30, the half gear 32 is meshed with the driving gear 29, and the shunt pipe 31 can be restored to its original position through the torque of the reset torsion spring 33.

The shunt pipe 31 is provided with a plurality of spray heads 34, through which water mist can be evenly sprayed on the dust to prevent the dust from floating in the air and affecting the health of the staff. The shunt pipe 31 is connected with a connecting pipe 35, and one end of the connecting pipe 35 away from the shunt pipe 31 is connected with a telescopic hose 36, and one end of the telescopic hose 36 away from the connecting pipe 35 is connected with the drain pipe 24.

In this embodiment, when the crushing roller crushes the waste, dust will float out from the feed storage, and the water in the water tank 22 is sprayed out through the spray head 34 by the water pump 23, and the spray head 34 on the diversion pipe 31 is driven to swing at an angle through the linkage component 2 and the swing component, so that the spray head 34 can evenly spray the mist water on the dust floating out from the feed port 9, effectively preventing the dust from affecting the working environment around the box body 1.

A method for using a construction waste recycling device, based on the above construction waste recycling device, comprises the following steps:

S1. When in use, the construction waste to be recycled is put into the crushing chamber 2 through the feed port 9, and the waste is crushed by the two crushing rollers in the crushing assembly. The crushed waste passes through the through slot 4. When the crushed waste passes through the through slot 4, the crushing blades 7 are driven by the first driving motor 5 to perform secondary crushing on the waste;

S2. The crushed waste will fall into the collecting frame 8, and the metal objects in the waste will be collected by the collecting frame 8. Other waste will fall into the bottom of the collecting chamber 3 through the mesh of the collecting frame 8. At the same time, the first driving motor 5 will drive the collecting frame 8 to reciprocate left and right while driving the crushing blades 7 to rotate. The movement of the collecting frame 8 prevents the waste from accumulating in the collecting frame 8.

S3. When the crushing roller crushes the waste, the water in the water tank 22 is sprayed out through the spray head 34 through the water pump 23, and the spray head 34 on the diversion pipe 31 is driven to swing at an angle through the linkage component 2 and the swing component, so that the spray head 34 sprays the mist water into the dust floating out from the feed port 9.

working principle:

When in use, the construction waste to be recycled is put into the crushing chamber 2 through the feed port 9, and the first pulley 14 is driven by the second drive motor 13 to rotate, and the first pulley 14 drives the second pulley 16 to rotate through the transmission belt 1, and the second pulley 16 drives the driving gear 17 and the first crushing roller 11 to rotate through the connecting shaft 15, and then the driving gear 17 and the driven gear 18 are meshed, and the driven gear 18 drives the second crushing roller 12 to rotate through the connecting shaft 15, and the construction waste is first crushed by the rotation of the first crushing roller 11 and the second crushing roller 12;

The first crushed waste will pass through the through slot 4. At this time, the first driving motor 5 drives the rotating shaft 6 to rotate. When the rotating shaft 6 rotates, it drives the crushing blades 7 to rotate at a high speed in the through slot 4, and the waste is crushed for the second time by the crushing blades 7.

The crushed waste will fall into the collection frame 8. At the same time, the first drive motor 5 will drive the reciprocating screw to rotate while driving the crushing blade 7 to rotate. The reciprocating screw rotates on the rotating shaft 6. At this time, the positioning plate 20 will reciprocate horizontally on the reciprocating screw through the crescent pin 21. The positioning plate 20 will synchronously drive the collection frame 8 to reciprocate left and right. The movement of the collection frame 8 prevents the waste from accumulating in the collection frame 8.

The water in the water tank 22 is input into the drain pipe 24 through the water pump 23. At the same time, when the second drive motor 13 drives the first pulley 14 to rotate, it will synchronously drive the third pulley 25 to rotate. The third pulley 25 will drive the fourth pulley 28 to rotate through the transmission belt 2. When the fourth pulley 28 rotates, it will drive the driving gear 29 to rotate through the driving shaft 27. The driving gear 29 is engaged with the half gear 32. When the half gear 32 rotates, it will drive the connecting shaft 30 to rotate. When the connecting shaft 30 drives the shunt pipe 31 to rotate a certain angle, it will be restored to its original position by the torsion of the reset torsion spring 33. Through the reciprocating swing of the shunt pipe 31, the spray head 34 will evenly spray the mist water on the dust floating out from the feed inlet 9.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A construction waste recycling device, comprising a housing (1), characterized in that the interior of the housing (1) is divided into a crushing chamber (2) and a collecting chamber (3), a through slot (4) is provided between the crushing chamber (2) and the collecting chamber (3), a crushing assembly is provided inside the crushing chamber (2), and construction waste is crushed by the crushing assembly; The housing (1) is fixedly mounted with a first drive motor (5); a rotating shaft (6) is fixedly mounted on the output end of the first drive motor (5); a crushing blade (7) is mounted on the rotating shaft (6); the crushing blade (7) is located inside the through groove (4); a collecting frame (8) is provided inside the collecting chamber (3); the collecting frame (8) is located below the outlet of the through groove (4); The upper end surface of the box body (1) is provided with a feed port (9), and a dust removal component is provided above the feed port (9), through which the dust generated by the crushing component is cleaned. 2. A construction waste recycling device according to claim 1, characterized in that: the crushing assembly comprises a mounting plate (10), a first crushing roller (11) and a second crushing roller (12), the mounting plate (10) being mounted on a housing (1), the first crushing roller (11) and the second crushing roller (12) being symmetrically mounted inside a crushing chamber (2), a second driving motor (13) being fixedly mounted on the mounting plate (10), a first pulley (14) being fixedly mounted on an output shaft of the second driving motor (13), a connecting shaft (15) being fixedly mounted on the first crushing roller (11) and the second crushing roller (12), a second pulley (16) and a driving gear (17) being fixedly mounted on the first crushing roller (11) through the connecting shaft (15), a driven gear (18) being fixedly mounted on the second crushing roller (12) through the connecting shaft (15), the driving gear (17) and the driven gear (18) being meshed with each other, and the first pulley (14) being driven by the second pulley (16) through a transmission belt. 3. A construction waste recycling device according to claim 2, characterized in that: a linkage component 1 is arranged inside the collection chamber (3), and the linkage component 1 includes a bidirectional thread (19) and a positioning plate (20), the bidirectional thread (19) is arranged on the rotating shaft (6), the positioning plate (20) is installed on the side end surface of the collection frame (8), the positioning plate (20) is movably installed on the bidirectional thread (19), and a crescent pin (21) is movably installed on the positioning plate (20). 4. A construction waste recycling device according to claim 1, characterized in that: the dust removal component includes a water tank (22), the water tank (22) is installed on the box body (1), a water pump (23) is fixedly installed on the water tank (22), and the output end of the water pump (23) is connected to a drain pipe (24). 5. A recycling device for construction waste according to claim 4, characterized in that: a linkage component 2 is installed on the box body (1), and the linkage component 2 includes a third pulley (25) and two symmetrically arranged positioning side plates (26), the two positioning side plates (26) are installed on the upper end surface of the box body (1), the third pulley (25) is installed on the output shaft of the second drive motor (13), the position of the third pulley (25) is located on the outside of the first pulley (14), a driving shaft (27) is rotatably installed on the positioning side plate (26), a fourth pulley (28) and a driving gear (29) are fixedly installed on the driving shaft (27), and the third pulley (25) and the fourth pulley (28) are driven by a transmission belt 2. 6. A construction waste recycling device according to claim 5, characterized in that: a swing assembly is provided on the positioning side plate (26), and the swing assembly includes a connecting shaft (30), the connecting shaft (30) is rotatably mounted on the positioning side plate (26), one end of the connecting shaft (30) is fixedly mounted with a shunt pipe (31), a half gear (32) and a reset torsion spring (33) are fixedly mounted on the connecting shaft (30), the reset torsion spring (33) is mounted on the positioning side plate (26) at one end away from the connecting shaft (30), and the half gear (32) is meshed with a driving gear (29). 7. A construction waste recycling device according to claim 6, characterized in that: a spray head (34) is provided on the diversion pipe (31), the diversion pipe (31) is connected to a connecting pipe (35), the end of the connecting pipe (35) away from the diversion pipe (31) is connected to a telescopic hose (36), and the end of the telescopic hose (36) away from the connecting pipe (35) is connected to a drain pipe (24). 8. A construction waste recycling device according to claim 3, characterized in that a sliding groove (37) is provided at the inner top of the collecting chamber (3), and the upper end surface of the positioning plate (20) is slidably installed on the inner top of the sliding groove (37). 9. A construction waste recycling device according to claim 2, characterized in that a stabilizing plate (38) is fixedly mounted on the box body (1), and the end of the connecting shaft (15) away from the first crushing roller (11) is rotatably mounted on the stabilizing plate (38). 10. A method for using a construction waste recycling device, based on the construction waste recycling device of claim 7, characterized in that it comprises the following steps: S1. When in use, construction waste to be recycled is put into the crushing chamber (2) through the feed port (9), and the waste is crushed by two crushing rollers in the crushing assembly. The crushed waste falls into the collecting chamber (3) through the through slot (4). When the crushed waste passes through the through slot (4), the crushing blades (7) are driven by the first driving motor (5) to crush the waste for the second time; S2. The pulverized waste will fall into the collecting frame (8), and the metal objects in the waste will be collected by the collecting frame (8), while other waste will fall into the bottom of the collecting chamber (3) through the mesh of the collecting frame (8). At the same time, the first driving motor (5) will drive the collecting frame (8) to reciprocate left and right while driving the pulverizing blades (7) to rotate, so that the waste is prevented from accumulating in the collecting frame (8) by the movement of the collecting frame (8); S3. When the crushing roller crushes the waste, the water in the water tank (22) is sprayed out through the spray head (34) by the water pump (23), and the spray head (34) on the diverter pipe (31) is driven to swing at an angle through the linkage component 2 and the swing component, so that the spray head (34) sprays the mist water into the dust floating out from the feed port (9).