CN117884210A - Material recycling device for low-carbon building construction - Google Patents

Abstract

The invention discloses a material recycling device for low-carbon building construction, which belongs to the field of building brick material recycling, and comprises a screening recycling box, wherein a recycling screening unit is arranged in the screening recycling box and is used for screening large-volume waste materials after decoration dismantling, crushing small-volume waste materials after decoration dismantling and refining and screening materials after recycling and crushing mechanisms, and a recycling temporary storage mechanism is arranged at the outer side of the screening recycling box and is used for storing materials after crushing and screening of the recycling screening unit. According to the invention, the large-volume waste materials in the building decoration materials slide rightwards into the primary screening temporary storage box through the inclined screening bracket, and the small-volume waste materials fall to the top of the jaw broken pieces through the screening cross arm and are broken, so that the broken pieces are subjected to re-screening, and the metal materials and the light plastic materials which can be adsorbed by magnetic force in the mixed broken pieces can be classified and recovered, thereby achieving the effect of improving the recycling value of the waste materials of the building decoration.

Description

A low-carbon building construction material recycling device

Technical Field

The invention relates to the technical field of building decoration material recycling, and in particular to a low-carbon building construction material recycling device.

Background technique

After the main structure of the house is completed, the redundant walls in the house need to be demolished according to the interior design drawings. During the wall demolition process, a large amount of construction waste mainly composed of bricks, concrete and thermal insulation materials will be generated. Therefore, by recycling the waste materials generated during the construction and decoration process, it is possible to accelerate the creation of a low-carbon green living environment.

At present, when the wall building materials are removed during the decoration process, they are directly crushed by a crushing device to form debris mixed with various building materials. When recycling them, they can only be used as earth backfill materials, which undoubtedly wastes the recycling value of the remaining materials. For example, the mixed debris contains steel bars and tie bars for wall support (anti-tensile) metal materials, PVC pipes for water and electricity conduction, and foam layer plastic materials for insulation.

Therefore, we propose a material recycling device for low-carbon building construction.

Summary of the invention

The purpose of the present invention is to solve the problem that the wall building materials removed during the existing decoration process cannot be directly crushed by a crushing device to effectively recover the metal materials and plastic materials in the mixed debris, thereby reducing the recovery value of the building decoration demolition materials, and to propose a low-carbon building construction material recycling device.

In order to achieve the above object, the present invention adopts the following technical solutions:

A material recycling device for low-carbon building construction comprises a screening and recycling box for decoration and demolition materials, the top of the screening and recycling box is connected to a dust treatment pipe, a recycling and screening unit is arranged inside the screening and recycling box, and the recycling and screening unit is composed of a recycling primary screening mechanism, a recycling crushing mechanism and a recycling re-screening mechanism in a processing order from top to bottom of the decoration and demolition materials, the recycling primary screening mechanism is used to screen large-volume waste materials after decoration and demolition, the recycling crushing mechanism is used to crush small-volume waste materials after decoration and demolition, the recycling re-screening mechanism is used to refine and screen the materials crushed by the recycling crushing mechanism, and a recycling temporary storage mechanism is arranged on the outside of the screening and recycling box, and the recycling temporary storage mechanism is used to store the materials crushed and screened by the recycling screening unit.

Preferably, the recovery primary screening mechanism includes a screening feed box arranged at the top of the side of the screening recovery box, the top of the screening feed box is connected to a recovery closed pipe, the bottom of the screening feed box is provided with a primary screening transverse inlet, and an inclined screening bracket is provided below the primary screening transverse inlet, and a screening cross arm is fixed inside the inclined screening bracket.

Preferably, a screening blocking bracket fixed to the inner top wall of the screening recovery box is provided on the top of the screening cross arm, and a lifting screening extrusion block is movably connected to the bottom of the screening blocking bracket, and the lifting screening extrusion block is located above the notches of two adjacent front and rear screening cross arms.

Preferably, the recovery and crushing mechanism includes a jaw crushing mating block fixed to the bottom of the screening cross arm in the opposite direction of the inclination of the screening cross arm, and a jaw crusher is arranged at the bottom of the screening cross arm. The jaw crusher consists of a crushing servo motor, a jaw crushing piece and a transmission component that drives the jaw crushing piece to reciprocate through the crushing servo motor.

Preferably, the jaw crushing matching block and the jaw crushing piece are arranged alternately, and both are arranged to be inclined downward, and a crushing outlet is opened on the left side of the jaw crushing piece.

Preferably, the recovery and re-screening mechanism includes a heat dissipation screening pipe arranged on the left side wall of the screening recovery box, the heat dissipation screening pipe is connected to a screening blower, and the inner bottom wall of the screening recovery box is provided with an arc-shaped screening bracket.

Preferably, the heat dissipating screening pipe is provided with a rotating screening arc ring slidably connected to the side wall of the screening recovery box above the air outlet on the inner side of the screening recovery box, and the bending direction of the rotating screening arc ring is opposite to that of the arc screening bracket.

Preferably, the recovery and temporary storage mechanism includes a primary screening temporary storage box connected to the right side of the screening recovery box, the inner wall of the primary screening temporary storage box is slidably connected with an electromagnet collecting bracket, the upper rotation of the electromagnet collecting bracket is connected with a vertical collecting bracket, and a brick collection through hole is opened between the electromagnet collecting bracket and the vertical collecting bracket.

Preferably, the inner wall of the screening recovery box is slidably connected to a re-screening collection box, the inner wall of the screening recovery box is slidably provided with a pneumatic detection slider, and the left side of the pneumatic detection slider is touch-connected with a touch-type start switch, the top of the touch-type start switch is electrically connected to an electric lifting hydraulic cylinder fixed to the left side of the screening recovery box, and the bottom of the electric lifting hydraulic cylinder is fixed with a lifting and closing bracket slidably connected to the left side wall of the screening recovery box through a hydraulic connecting rod, the pneumatic detection slider is slidably connected to the right side of the lifting and closing bracket, the left side of the re-screening collection box is fixed to the right side of the lifting and closing bracket, and a re-screening collection chamber is provided inside the re-screening collection box.

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

1. Aiming at the problem that the wall building materials removed during the existing decoration process cannot be directly crushed by the crushing device to effectively recycle the metal materials and plastic materials in the mixed slag, which reduces the recycling value of the building decoration demolition materials, the wall building materials removed during the decoration process are dropped into the screening feed box through the recovery closed pipe by setting the screening bracket, and the large volume of waste is slid to the right into the primary screening temporary storage box by the inclined screening bracket, and the small volume of waste is dropped to the top of the jaw crusher through the screening cross arm and crushed, so as to facilitate the subsequent screening airflow blown by the screening blower to re-screen the crushed materials, so that the metal materials and lightweight plastic materials that can be magnetically adsorbed in the mixed slag can be classified and recycled, so as to achieve the effect of improving the recycling value of building decoration waste.

2. By arranging the lifting and screening extrusion blocks, jaw crushers and screening cross arms and other devices to cooperate with each other, after the large-volume waste, that is, the recyclable bricks slide to the top of the screening cross arm, the top is squeezed by the lifting and screening extrusion blocks, so as to remove the concrete from the surface of the bricks, simplify the cleaning steps of the recycled bricks, and improve the available value of the recycled bricks.

3. Through the coordination of devices such as heat dissipation screening tube, arc-shaped screening bracket and re-screening collection box, after the small volume waste is crushed and falls through the jaw crusher, the screening blower is started to blow air to the heat dissipation screening tube, and the waste on the bottom wall of the screening recovery box is driven to the inner wall of the screening recovery box, thereby driving waste of different qualities to move to different heights of the arc-shaped screening bracket, and the driving force is offset by the component force of the waste gravity along the direction of the driving force, so that the waste stays at different heights of the arc-shaped screening bracket, achieving the effect of pneumatic re-screening, which is convenient for the subsequent classification and collection of the screened waste through the re-screening collection box.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a low-carbon building construction material recycling device proposed by the present invention;

FIG2 is an exploded view of the internal structure of a low-carbon building construction material recycling device proposed by the present invention;

FIG3 is an exploded view of an inclined screening support structure of a low-carbon building construction material recycling device proposed by the present invention;

FIG4 is an exploded view of the internal structure of a low-carbon building construction material recycling device proposed by the present invention from another perspective;

FIG5 is a schematic cross-sectional view of a rotary screening arc ring structure of a low-carbon building construction material recycling device proposed by the present invention;

FIG6 is a schematic diagram of the structure of a re-screening and collecting box of a low-carbon building construction material recycling device proposed by the present invention;

7 is a schematic diagram of the structure of a touch-type starting switch and a pneumatic detection slider of a lifting and closing bracket cross section of a low-carbon building construction material recycling device proposed by the present invention.

In the figure: 1. Screening recovery box; 11. Dust treatment pipe; 2. Screening feed box; 21. Recovery closed pipe; 22. Primary screening horizontal inlet; 3. Inclined screening bracket; 31. Screening cross arm; 311. Jaw crushing matching block; 32. Screening blocking bracket; 33. Lifting screening extrusion block; 4. Jaw crusher; 41. Crushing servo motor; 42. Jaw crushing piece; 5. Heat dissipation screening pipe; 51. Screening blower; 52. Arc screening bracket; 53. Rotary screening arc ring; 6. Primary screening temporary storage box; 61. Electromagnet collection bracket; 62. Vertical collection bracket; 7. Rescreening collection box; 71. Pneumatic detection slider; 72. Electric lifting hydraulic cylinder; 73. Lifting closed bracket; 74. Rescreening collection chamber.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Referring to Figures 1-7, a low-carbon building construction material recycling device includes a screening and recycling box 1 for decoration and demolition materials. The top of the screening and recycling box 1 is connected to a dust treatment pipe 11. A recycling screening unit is arranged inside the screening and recycling box 1. The recycling screening unit consists of a recycling primary screening mechanism, a recycling crushing mechanism and a recycling re-screening mechanism in a top-down processing order of the decoration and demolition materials. The recycling primary screening mechanism is used to screen large-volume waste materials after decoration and demolition, the recycling crushing mechanism is used to crush small-volume waste materials after decoration and demolition, and the recycling re-screening mechanism is used to refine and screen the materials crushed by the recycling crushing mechanism. A recycling temporary storage mechanism is arranged on the outside of the screening and recycling box 1. The recycling temporary storage mechanism is used to store the materials crushed and screened by the recycling screening unit.

Through the above technical scheme, after the screening air is blown into the recovery initial screening mechanism, the dust in the crushed material is driven to move upward, and the dust is discharged from the screening recovery box 1 through the dust processing pipe 11. At this time, a liquid dust suction device can be connected to the outlet of the dust processing pipe 11 to absorb the dust to avoid polluting the external environment of the screening recovery box 1.

As shown in Figures 3 and 4, the recovery primary screening mechanism includes a screening feed box 2 arranged at the top of the side of the screening recovery box 1, the top of the screening feed box 2 is connected to a recovery closed pipe 21, the bottom of the screening feed box 2 is provided with a primary screening transverse inlet 22, and an inclined screening bracket 3 is provided below the primary screening transverse inlet 22, and a screening cross arm 31 is fixed inside the inclined screening bracket 3.

Through the above technical solution, a screening blocking bracket 32 fixed to the inner top wall of the screening recovery box 1 is provided on the top of the screening cross arm 31, and a lifting screening extrusion block 33 is movably connected to the bottom of the screening blocking bracket 32, and the lifting screening extrusion block 33 is located above the gaps of the two front and rear adjacent screening cross arms 31;

Based on the above, the interval between the front and rear adjacent screening cross arms 31 is smaller than the width of the recycled bricks, so that when the reusable bricks pass through the top of the screening cross arm 31, they are collected from the right side of the top of the inclined screening bracket 3, and when large-volume construction waste, i.e., bricks with a larger area, fall, the top of the bricks is squeezed by lifting the screening squeeze block 33, and the smaller bricks and the concrete on the surface of the larger bricks are screened from the interval between the screening cross arms 31, thereby ensuring that the larger bricks after recycling do not need to remove the concrete, reducing the difficulty of recycling.

As shown in Figures 3 and 4, the recovery and crushing mechanism includes a jaw crushing mating block 311 fixed to the bottom of the screening cross arm 31 and in the opposite direction of the inclination of the screening cross arm 31, and a jaw crusher 4 is arranged at the bottom of the screening cross arm 31. The jaw crusher 4 consists of a crushing servo motor 41, a jaw crushing piece 42 and a transmission component that drives the jaw crushing piece 42 to reciprocate through the crushing servo motor 41.

Through the above technical solution, the jaw crushing matching block 311 and the jaw crushing piece 42 are staggered, and both are tilted downward, and a crushing outlet is opened on the left side of the jaw crushing piece 42, thereby increasing the crushing path of small-volume construction waste falling to the jaw crushing piece 42, thereby improving the crushing effect of small-volume construction waste.

Based on the above, when the small-volume waste falls to the top of the jaw crusher 42 through the screening cross arm 31, the jaw crusher 4 drives the jaw crusher 42 and the bottom of the jaw crusher matching block 311 to squeeze and crush the small-volume waste, completing the screening and crushing operations in the recycling process of small-volume construction waste.

As shown in Figure 4, the recycling and re-screening mechanism includes a heat dissipation screening tube 5 arranged on the left side wall of the screening recovery box 1, the heat dissipation screening tube 5 is connected to the screening blower 51, and the inner bottom wall of the screening recovery box 1 is curved to be provided with an arc-shaped screening bracket 52, which can drive construction waste materials of different qualities to move to the curved surfaces of different heights of the arc-shaped screening bracket 52 when the screening airflow is blown into the heat dissipation screening tube 5 to overcome the power generated by the screening airflow.

Through the above technical solution, the heat dissipation screening pipe 5 is provided with a rotary screening arc ring 53 slidably connected to the side wall of the screening recovery box 1 above the air outlet on the inner side of the screening recovery box 1, and the rotary screening arc ring 53 is arranged to be rolled downward, so that the plastic building materials can be recovered after the screening airflow blows to the rotary screening arc ring 53, and the bending direction of the rotary screening arc ring 53 is opposite to that of the arc screening bracket 52;

Based on the above, the inner wall of the screening recovery box 1 is slidably connected with the re-screening collection box 7, and the inner wall of the screening recovery box 1 is slidably provided with a pneumatic detection slider 71, and the left side of the pneumatic detection slider 71 is touch-connected with a touch-type starting switch, and the top of the touch-type starting switch is electrically connected to an electric lifting hydraulic cylinder 72 fixed to the left side of the screening recovery box 1, and the bottom of the electric lifting hydraulic cylinder 72 is fixed with a lifting and closing bracket 73 slidably connected to the left side wall of the screening recovery box 1 through a hydraulic connecting rod, the pneumatic detection slider 71 is slidably connected to the right side of the lifting and closing bracket 73, and the left side of the re-screening collection box 7 is fixed to the right side of the lifting and closing bracket 73, that is, as shown in Figures 1, 6 and 7, the lifting and closing bracket 73 is divided into a lifting and closing bracket 73 that is slidably connected to the inner wall of the left side of the screening recovery box 1 The hopper 73 is a substantially parallel plate 72 which is fixed to the bottom of the hopper 73 and is provided with a re-screening collection chamber 74. The re-screening collection box 7 is composed of a driving part which is dynamically connected and a closing part which is slidably connected to the left side of the screening recovery box 1. During the lifting and lowering process of the lifting and lowering closing bracket 73, the closing part is used to seal the slide groove during the lifting and lowering sliding process to prevent dust and impurities from flying out from the gap of the lifting and lowering slide groove, so as to achieve the purpose of sealing the lifting and lowering slide groove during the lifting and lowering sliding process of the closing bracket 73 by the electric lifting hydraulic cylinder 72, and isolating the inside and outside of the screening recovery box 1. In addition, a re-screening collection chamber 74 is provided inside the re-screening collection box 7, that is, the re-screening collection box 7 is composed of a closing plate arranged at the bottom and a collection area arranged at the top. When the electric lifting hydraulic cylinder 72 is started, the lifting and lowering of the closing plate fixed to the lifting and lowering closing bracket 73 can be controlled, thereby completing the lifting and lowering control of the re-screening collection box 7.

Further based on the above, the pneumatic detection slider 71 is set in a blade shape and fits the inner wall of the screening recovery box 1, so as to capture the screening airflow blown out by the screening blower 51. When the screening blower 51 is working, the inside of the screening recovery box 1 is blown through the heat dissipation screening pipe 5, thereby driving the pneumatic detection slider 71 to move upward, as shown in Figure 7. At this time, the pneumatic detection slider 71 touches the touch start switch set on the top of the inner wall of the lifting and closing bracket 73, and turns on the electric lifting hydraulic cylinder 72 to drive the lifting and closing bracket 73 to rise, thereby closing the bottom of the arc-shaped screening bracket 52. After the screening blower 51 stops working, the pneumatic detection slider 71 descends. At this time, the pneumatic detection slider 71 is not in contact with the lifting and closing bracket 73. The touch-type start switch provided on the inner wall of the closed bracket 73 is touched, and the electric lifting hydraulic cylinder 72 is turned on to drive the lifting closed bracket 73 to descend, and the classified materials are moved to the materials at different radius areas on the top of the arc-shaped screening bracket 52 in sequence according to their ability to overcome the screening airflow and maintain the original state, and fall from the top of the lifting closed bracket 73 to the corresponding re-screening collection chamber 74, completing the collection operation of the re-screened fragments. This is the control process of controlling the lifting and lowering of the electric lifting hydraulic cylinder 72 by the pneumatic detection slider 71 during the re-screening process of construction waste, and after collection, the fragments that need to be recycled in different areas can be classified and collected through the cover plate corresponding to the re-screening collection chamber 74.

As shown in Figure 4, the recovery temporary storage mechanism includes a primary screening temporary storage box 6 connected to the right side of the screening recovery box 1, and the inner wall of the primary screening temporary storage box 6 is slidably connected with an electromagnet collecting bracket 61, and the upper rotation of the electromagnet collecting bracket 61 is connected with a vertical collecting bracket 62, and a brick collection through hole is opened between the electromagnet collecting bracket 61 and the vertical collecting bracket 62.

Through the above technical scheme, the small volume metal materials that can be magnetically adsorbed and fall through the gap of the screening cross arm 31 are magnetically adsorbed and captured by the vertical collecting bracket 62 vertically attached to the side wall of the screening recovery box 1. After the construction waste collected in the screening feed box 2 is screened and recovered, the electromagnet collecting bracket 61 is taken out of the primary screening temporary storage box 6 to drive the metal materials captured by magnetic adsorption to move outside the primary screening temporary storage box 6, thereby facilitating the capture operation of the metal materials after magnetic adsorption.

In the present invention, the building materials removed during decoration are put into the screening recovery box 1 through the screening feed box 2, and the large-volume waste is screened through the screening cross arm 31, so that the large-volume decoration construction waste falls into the primary screening temporary storage box 6, and when the small-volume waste falls to the top of the jaw crushing piece 42 through the screening cross arm 31, the jaw crusher 4 drives the jaw crushing piece 42 and the bottom of the jaw crushing matching block 311 to squeeze and crush the small-volume waste, completing the screening and crushing operation in the process of recycling small-volume construction waste, which is the primary screening process of construction waste recycling;

Based on the above, the interval between the front and rear adjacent screening cross arms 31 is smaller than the width of the recycled bricks, so that when the reusable bricks pass through the top of the screening cross arms 31, they are collected from the right side of the top of the inclined screening bracket 3, and when large-volume construction waste, i.e., bricks with a larger area, fall, the top of the bricks is squeezed by lifting the screening squeeze block 33, and the concrete on the surface of the smaller bricks and the larger bricks is screened from the interval between the screening cross arms 31, thereby ensuring that the larger bricks after recycling do not need to remove the concrete, which increases the difficulty of recycling;

Based on the above, after the large volume falls across the screening cross arm 31 into the primary screening temporary storage box 6, the metal materials that can be magnetically adsorbed therein are collected by the electromagnet collection bracket 61 arranged on the side, and the reusable bricks are collected to the bottom of the primary screening temporary storage box 6 through the brick collection through hole;

After the small-volume waste is crushed by the jaw crushing piece 42 and the jaw crushing matching block 311 and falls into the re-screening collection box 7, the screening blower 51 is started to drive the heat dissipation screening tube 5 to the center of the bottom wall of the screening recovery box 1 for air selection. During this period, the screening air blown out by the heat dissipation screening tube 5 drives the heavier fragments to move to different heights on the top of the inclined arc screening bracket 52, and the flow direction of the screening air is toward the top of the screening recovery box 1, so that the plastic fragments can be driven into the downward-rolling rotary screening arc ring 53, and the upward-flowing air can cool the working jaw crusher 4, increase its working time, and thus improve the working efficiency of the jaw crusher 4;

Based on the above, the pneumatic detection slider 71 is set in a blade shape and fits the inner wall of the screening recovery box 1, so as to capture the screening airflow blown out by the screening blower 51. When the screening blower 51 is working, the inside of the screening recovery box 1 is blown through the heat dissipation screening pipe 5, thereby driving the pneumatic detection slider 71 to move upward. At this time, the electric starting switch is turned on so that the electric lifting hydraulic cylinder 72 drives the lifting and closing bracket 73 to rise, thereby closing the bottom of the arc-shaped screening bracket 52. After the screening blower 51 stops working, the pneumatic detection slider 71 descends. At this time, the electric starting switch is turned on so that the electric lifting hydraulic cylinder 72 drives the lifting and closing bracket 73 to rise, thereby closing the bottom of the arc-shaped screening bracket 52. 2 drives the lifting and closing bracket 73 to descend, and the classified materials, that is, the materials at different radius areas on the top of the arc-shaped screening bracket 52 according to the ability to overcome the screening airflow to maintain the original state, fall from the top of the lifting and closing bracket 73 to the corresponding re-screening collection chamber 74, and complete the collection operation of the re-screened fragments. This is the control process of controlling the lifting and lowering of the electric lifting hydraulic cylinder 72 by the pneumatic detection slider 71 during the re-screening process of the construction waste, and after collection, the fragments that need to be recycled in different areas can be classified and collected through the cover plate corresponding to the re-screening collection chamber 74.

The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims (7)

1. A low-carbon building construction material recycling device, comprising a screening recovery box (1) for decoration and demolition materials, the top of the screening recovery box (1) being connected to a dust treatment pipe (11), characterized in that a recycling screening unit is arranged inside the screening recovery box (1), the recycling screening unit being composed of a recycling primary screening mechanism, a recycling crushing mechanism and a recycling re-screening mechanism in a top-down processing order of the decoration and demolition materials, the recycling primary screening mechanism being used to screen large-volume waste materials after decoration and demolition, the recycling crushing mechanism being used to crush small-volume waste materials after decoration and demolition, and the recycling re-screening mechanism being used to refine and screen the materials crushed by the recycling crushing mechanism; A recovery temporary storage mechanism is arranged outside the screening recovery box (1), and the recovery temporary storage mechanism is used to store the material after crushing and screening by the recovery screening unit; The recovery primary screening mechanism comprises a screening feed box (2) arranged at the top of the side of the screening recovery box (1), the top of the screening feed box (2) is connected to a recovery closed pipe (21), the bottom of the screening feed box (2) is provided with a primary screening transverse inlet (22), and an inclined screening bracket (3) is arranged below the primary screening transverse inlet (22), and a screening cross arm (31) is fixed inside the inclined screening bracket (3); A screening blocking bracket (32) fixed to the inner top wall of the screening recovery box (1) is arranged on the top of the screening cross arm (31), and a lifting screening extrusion block (33) is movably connected to the bottom of the screening blocking bracket (32), and the lifting screening extrusion block (33) is located above the notches of two front and rear adjacent screening cross arms (31). 2. A low-carbon building construction material recycling device according to claim 1, characterized in that the recycling and crushing mechanism includes a jaw crushing matching block (311) fixed to the bottom of the screening cross arm (31) and the opposite inclination direction of the screening cross arm (31), and a jaw crusher (4) is arranged at the bottom of the screening cross arm (31), and the jaw crusher (4) is composed of a crushing servo motor (41), a jaw crushing piece (42) and a transmission component that drives the jaw crushing piece (42) to reciprocate through the crushing servo motor (41). 3. A low-carbon building construction material recycling device according to claim 2, characterized in that the jaw crushing matching block (311) and the jaw crushing piece (42) are arranged alternately, and both are arranged to be inclined downward, and a crushing outlet is opened on the left side of the jaw crushing piece (42). 4. A low-carbon building construction material recycling device according to claim 3, characterized in that the recycling and re-screening mechanism includes a heat dissipation screening pipe (5) arranged on the left side wall of the screening recovery box (1), the heat dissipation screening pipe (5) is connected to a screening blower (51), and the inner bottom wall of the screening recovery box (1) is provided with an arc-shaped screening bracket (52). 5. A low-carbon building construction material recycling device according to claim 4, characterized in that the heat dissipation screening pipe (5) is provided with a rotating screening arc ring (53) slidably connected to the side wall of the screening recovery box (1) above the air outlet on the inner side of the screening recovery box (1), and the rotating screening arc ring (53) is opposite to the bending direction of the arc screening bracket (52). 6. A low-carbon building construction material recycling device according to claim 5, characterized in that the recycling temporary storage mechanism includes a primary screening temporary storage box (6) connected to the right side of the screening recovery box (1), the inner wall of the primary screening temporary storage box (6) is slidably connected with an electromagnet collecting bracket (61), the upper part of the electromagnet collecting bracket (61) is rotatably connected with a vertical collecting bracket (62), and a brick collecting through hole is opened between the electromagnet collecting bracket (61) and the vertical collecting bracket (62). 7. A low-carbon building construction material recycling device according to claim 6, characterized in that the inner wall of the screening recovery box (1) is slidably connected to a re-screening collection box (7), the inner wall of the screening recovery box (1) is slidably provided with a pneumatic detection slider (71), and the left side of the pneumatic detection slider (71) is touch-connected with a touch-type starting switch, the top of the touch-type starting switch is electrically connected to an electric lifting hydraulic cylinder (72) fixed to the left side of the screening recovery box (1), and the bottom of the electric lifting hydraulic cylinder (72) is fixed with a lifting and closing bracket (73) slidably connected to the left side wall of the screening recovery box (1) through a hydraulic connecting rod, the pneumatic detection slider (71) is slidably connected to the right side of the lifting and closing bracket (73), the left side of the re-screening collection box (7) is fixed to the right side of the lifting and closing bracket (73), and a re-screening collection chamber (74) is provided inside the re-screening collection box (7).