Construction method for resource utilization of building waste by multi-stage crushing and screening

Abstract

The application relates to the technical field of building waste crushing, and discloses a building waste multi-stage crushing and screening resource construction method, which comprises the following steps: transporting building waste to a crushing station; the crushing station is provided with an impact crusher, the impact crusher crushes the building waste into crushed materials, and the crushed materials are discharged through a discharge port; the crushed materials are transported to a single-layer primary vibrating screen, the crushed materials are screened into coarse materials and fine materials through the primary vibrating screen; the fine materials are transported to a screening station, the screening station is provided with multiple layers of secondary vibrating screens, the fine materials pass through the multiple layers of secondary vibrating screens from top to bottom, a plurality of screening materials with different particle sizes and in sequence are intercepted by the multiple layers of secondary vibrating screens, and powder materials pass through the multiple layers of secondary vibrating screens, and the plurality of screening materials are separated and output. The obtained powder materials and the plurality of screening materials intercepted by the multiple layers of secondary vibrating screens can be used as raw materials for brick making or concrete making, etc., waste is turned into treasure, the comprehensive utilization rate of the building waste is improved, and remarkable economic and social benefits are achieved.

Description

Technical Field

[0001] This invention patent relates to the technical field of construction waste crushing, and more specifically, to a construction method for the resource utilization of construction waste through multi-stage crushing and screening. Background Technology

[0002] Construction and demolition processes generate a large amount of construction waste, including excavated soil, slag, and discarded materials. Statistics show that in 2022, my country's construction waste exceeded 2 billion tons. Construction waste cannot degrade naturally, and currently, my country's main disposal methods are landfill and recycling. However, the capacity of landfill sites for construction waste is limited, and recycling only involves processing usable old materials.

[0003] In the existing technology, due to the huge volume of construction waste, the limited capacity of construction waste disposal sites, and the lack of corresponding recycling measures, it is difficult to effectively treat construction waste. The long-term accumulation of construction waste occupies a large amount of land and easily causes serious pollution and ecological damage to soil, rivers, vegetation, and atmosphere. Summary of the Invention

[0004] The purpose of this invention is to provide a construction method for the resource utilization of construction waste through multi-stage crushing and screening, aiming to solve the problem that existing technologies are unable to effectively treat construction waste, resulting in serious pollution and ecological harm.

[0005] This invention is implemented as follows: a construction method for the resource recovery of construction waste through multi-stage crushing and screening includes the following construction steps:

[0006] 1) Transport construction waste to the crushing station;

[0007] 2) The crushing station has an impact crusher, which has a crushing chamber. The impact crusher is provided with an inlet and an outlet that communicate with the crushing chamber. The crushing chamber has a crushing zone, which is provided with multiple concentrically rotating hammers. The outer side of the crushing zone is provided with an impact liner.

[0008] The construction waste is fed into the crushing zone through the inlet. Multiple hammers rotate and impact the construction waste, and the impact liner bounces the construction waste that deviates from the crushing zone back into the crushing zone until the impact crusher crushes the construction waste into crushed material, which is then discharged through the outlet.

[0009] 3) The crushed material is conveyed to a single-layer primary vibrating screen, where it is screened into coarse and fine materials.

[0010] 4) The fine material is conveyed to the screening station, which has a multi-level vibrating screen. The fine material is screened from top to bottom through the multi-level vibrating screen to form a variety of screening materials with different particle sizes that are sequentially intercepted by the multi-level vibrating screen, as well as powder material that passes through the multi-level vibrating screen. The various screening materials are separated and output.

[0011] Optionally, the crushing station is equipped with a frame, and the bottom of the frame is equipped with a traveling track, and the impact crusher is mounted on the frame.

[0012] Optionally, the single-layer vibrating screen is mounted on a frame, and the impact crusher and the primary vibrating screen are arranged sequentially along the front-back direction of the frame.

[0013] Optionally, the discharge port is located at the lower part of the impact crusher, and the discharge port is connected to the top of the primary vibrating screen via a primary conveyor belt.

[0014] In construction step 2), the crushed material discharged from the outlet falls onto the primary conveyor belt, is transported by the primary conveyor belt to the top of the primary vibrating screen, and falls from top to bottom onto the primary vibrating screen.

[0015] Optionally, the screening station is equipped with a receiving hopper, and the multiple layers of secondary vibrating screens are arranged at intervals from top to bottom, and the multiple layers of secondary vibrating screens are arranged at an angle; a secondary conveyor belt is provided between the receiving hopper and the top of the multi-layer vibrating screens.

[0016] Each of the secondary vibrating screens in each layer is provided with a discharge conveyor belt at its lower end, and the discharge conveyor belt is arranged at an upward inclination along the transmission direction of the discharge conveyor belt.

[0017] In construction step 4), the fine material is placed in the receiving hopper, and the fine material in the receiving hopper is transported to the top of the multi-level vibrating screen through the secondary conveyor belt, and falls from top to bottom onto the secondary vibrating screen.

[0018] The fine material is sequentially sieved through a multi-level vibrating screen from top to bottom to form various sieved materials and powder. The various sieved materials are respectively placed on the multi-level vibrating screen and are correspondingly transported to multiple discharge conveyor belts by multiple secondary vibrating screens for separation and output. The powder falls below the multi-level vibrating screen.

[0019] In step 4), a fine material conveyor belt is provided below the primary vibrating screen, and the fine material is conveyed to the receiving hopper through the fine material conveyor belt.

[0020] Optionally, the front end of the frame is provided with a feed hopper, which is connected to the feed inlet of the impact crusher. The feed inlet is formed at the upper part of the impact crusher, and the crushing zone is formed below the feed inlet.

[0021] In construction step 2), the construction waste is placed in the feed hopper, and the construction waste in the feed hopper enters the crushing zone from top to bottom through the feed inlet;

[0022] The primary vibrating screen has a coarse material outlet at its front end, and a coarse material conveyor belt is provided between the coarse material outlet and the feed hopper; in step 4), the coarse material discharged from the coarse material outlet is conveyed to the top of the feed hopper by the coarse material conveyor belt and falls from top to bottom onto the feed hopper.

[0023] Optionally, the feed inlet and the crushing zone are arranged vertically offset, a curved feed channel is formed between the feed inlet and the crushing zone, and a sliding bottom wall is formed at the bottom of the feed channel, which extends downward from the lower end of the feed inlet to the crushing zone.

[0024] In construction step 2), the construction waste enters the feed channel through the feed inlet and slides down the bottom wall of the material into the crushing zone.

[0025] Optionally, the crushing chamber has an impact zone, which is arranged outside the crushing zone. The impact zone extends downward from the upper end of the feed inlet and is offset from the crushing zone; the feed inlet and the impact zone are respectively arranged on both sides of the crushing zone.

[0026] Along the top-to-bottom direction of the counterattack zone, the counterattack zone is provided with multiple counterattack liners, the multiple counterattack liners are arranged in a staggered manner inside and out, and the adjacent counterattack liners are arranged in a staggered and overlapping manner.

[0027] In construction step 2), the construction waste falling into the crushing zone is impacted by the rotating hammers of multiple hammers, and then deviates into the impact zone where it is bounced back into the crushing zone by multiple impact plates.

[0028] Optionally, the impact liner has an impact sidewall facing the crushing zone and a reverse sidewall away from the crushing zone. The middle part of the impact sidewall protrudes outward from the crushing zone, forming a bend. An expansion joint is connected to the reverse sidewall, and the expansion joint is arranged inclined downward along the direction from top to bottom of the impact zone. The discharge port is arranged away from the crushing zone.

[0029] In construction step 2), when the construction waste is deflected into the impact zone by the hammer, the construction waste impacts the impact sidewall of the impact liner and bounces back into the crushing zone.

[0030] When the construction waste impacts the impact wall, the telescopic device drives the impact liner to swing toward the crushing zone, and the bottom of the impact liner at the top of the impact zone passes over the discharge port; when the construction waste is bounced back to the crushing zone by the impact wall, the telescopic device drives the impact liner to swing away from the crushing zone and reset, and the bottom of the impact liner at the bottom of the impact zone is aligned vertically with the discharge port.

[0031] Optionally, a rotating head is hinged to the side wall of the impact, and the rotating head is provided with multiple stirring arms. The inner end of the stirring arm is fixedly connected to the rotating head, and the outer end of the stirring arm extends toward the crushing zone. The multiple stirring arms enclose a stirring area, and an elastic layer is provided at the bottom of the stirring area. The elastic layer is fixedly connected to the rotating head and is respectively connected to the inner end of the multiple stirring arms.

[0032] In construction step 2), when the construction waste impacts the impact liner and the telescopic device drives the impact liner to swing, multiple mixing arms rotate with the rotating head to rotate and mix the construction waste impacting the impact liner, and the elastic layer rebounds the construction waste back to the crushing zone.

[0033] Compared with existing technologies, the multi-stage crushing and screening resource utilization construction waste method provided by this invention involves transporting construction waste to a crushing station equipped with an impact crusher. The impact crusher crushes the construction waste into crushed material, which is then conveyed to a primary vibrating screen for screening into coarse and fine materials. The fine material is then conveyed to a multi-stage vibrating screen in the screening station, which includes a secondary vibrating screen and multiple layers of screens. This multi-stage vibrating screen can separate powder that has passed through multiple screens and material stuck on each layer of screens. The powder and the material from each layer of screens are piled up in various areas of the construction site. According to the mixing ratio, each type of material and powder is used to make bricks or concrete, etc., thus turning waste into treasure, improving the comprehensive utilization rate of construction waste, and having significant economic and social benefits. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the process for the multi-stage crushing, screening, and resource utilization construction method for construction waste provided by the present invention;

[0035] Figure 2 This is a three-dimensional schematic diagram of the crushing station provided by the present invention;

[0036] Figure 3 This is a three-dimensional schematic diagram of the screening station provided by the present invention;

[0037] Figure 4 This is an internal schematic diagram of the impact crusher provided by the present invention;

[0038] Figure 5This is a front view schematic diagram of the impact liner provided by the present invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0041] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0042] Reference Figure 1-5 The image shown is a preferred embodiment of the present invention.

[0043] The construction waste multi-stage crushing, screening, and resource recovery method provided by this invention includes the following construction steps:

[0044] 1) Transport construction waste to the crushing station;

[0045] 2) The crushing station has an impact crusher 110, which has a crushing chamber. The impact crusher 110 is provided with a feed inlet 1100 and a discharge outlet 1101 that connect to the crushing chamber. The crushing chamber has a crushing zone, which is provided with multiple concentric rotating hammers 111. An impact liner 112 is provided on the outside of the crushing zone.

[0046] Construction waste is conveyed to the crushing zone through the feed inlet 1100. Multiple hammers 111 rotate and impact the construction waste, and the impact liner 112 bounces the construction waste that deviates from the crushing zone back into the crushing zone until the impact crusher 110 crushes the construction waste into crushed material, which is then discharged through the discharge outlet 1101.

[0047] 3) The crushed material is conveyed to the single-layer primary vibrating screen 120, and the crushed material is screened into coarse material and fine material by the primary vibrating screen 120;

[0048] 4) Fine materials are conveyed to screening station 200, which has multi-level vibrating screen 210. Fine materials are screened from top to bottom through multi-level vibrating screen 210 to form screening materials of different particle sizes that are sequentially intercepted by multi-level vibrating screen 210, as well as powder materials that pass through multi-level vibrating screen 210. Multiple screening materials are separated and output.

[0049] The above-mentioned multi-stage crushing and screening resource utilization method for construction waste involves transporting construction waste to a crushing station equipped with an impact crusher 110. The impact crusher 110 crushes the construction waste into crushed material, which is then conveyed to a primary vibrating screen 120 for screening into coarse and fine materials. The fine material is then conveyed to a multi-stage vibrating screen 210 in a screening station 200. The multi-stage vibrating screen 210 includes a secondary vibrating screen and multiple layers of screens, which can separate powder that has passed through multiple screens and material stuck on each layer of screens. The powder and the material from each layer of screens are piled up in various areas of the construction site. According to the mixing ratio, each type of material and powder is used to make bricks or concrete, etc., turning waste into treasure, improving the comprehensive utilization rate of construction waste, and having significant economic and social benefits.

[0050] In a preferred embodiment, the multi-level vibrating screen 210 has three layers of screens. The first layer of screen can screen the crushed stone, the second layer of screen can screen the medium-sized sand, and the third layer of screen can screen the fine-sized sand. The materials of each level are stored and piled up separately, which facilitates strict measurement according to the mixing ratio during batching and ensures the quality of bricks.

[0051] Specifically, a block forming machine that integrates the advantages of table vibration and mold vibration can be used to vibrate and press the mixture of cement, powder and sieved material into shape. That is, by filling the mold with the mixture, the combined action of the vibrating table and the pressing head creates table-mold resonance, which makes the mixture fast, uniform and compact, forming environmentally friendly bricks with a certain strength.

[0052] Specifically, the crushing plant is equipped with a frame 100, and a traveling track 101 is provided at the bottom of the frame 100. The impact crusher 110 is mounted on the frame 100. This allows for convenient movement and layout of the crushing plant, providing high flexibility.

[0053] In a preferred embodiment, a single-layer vibrating screen is mounted on the frame 100, and the impact crusher 110 and the primary vibrating screen 120 are arranged sequentially along the front-to-back direction of the frame 100. Thus, the crushed material from the impact crusher 110 is transported to the primary vibrating screen 120, which is arranged with its front end facing down and its rear end facing up, allowing the screened coarse material to roll to the front end of the primary vibrating screen 120 under gravity.

[0054] The discharge port 1101 is located at the lower part of the impact crusher 110, and the discharge port 1101 is connected to the top of the primary vibrating screen 120 through the primary conveyor belt 130.

[0055] In construction step 2), the crushed material discharged from outlet 1101 falls onto the primary conveyor belt 130, which then transports it to the top of the primary vibrating screen 120, where it falls from top to bottom. In this way, the primary conveyor belt discharges the crushed material to the top opening at the rear end of the primary vibrating screen 120, causing finer materials to fall downwards under gravity and coarser materials to roll downwards along the inclined direction of the primary vibrating screen 120, achieving automated screening and high-efficiency processing.

[0056] The screening station 200 is equipped with a receiving hopper 220, and multi-level vibrating screens 210 are arranged at intervals from top to bottom, and the multi-level vibrating screens 210 are arranged at an incline; a secondary conveyor belt 230 is provided between the top of the receiving hopper 220 and the top of the multi-level vibrating screens 210.

[0057] Each level of vibrating screen is equipped with a discharge conveyor belt 240 at its lower end. The discharge conveyor belt 240 is arranged at an upward inclination along the transmission direction of the discharge conveyor belt 240.

[0058] In construction step 4), the fine material is placed in the receiving hopper 220. The fine material in the receiving hopper 220 is transmitted to the top of the multi-level vibrating screen 210 through the secondary conveyor belt 230 and falls from top to bottom onto the secondary vibrating screen.

[0059] Fine materials pass through the multi-level vibrating screen 210 from top to bottom in sequence to form various screened materials and powder. The various screened materials are placed on the multi-level vibrating screen 210 respectively, and are transferred by the multi-level vibrating screen 210 to multiple discharge conveyor belts 240 for separation and output. The powder falls below the multi-level vibrating screen.

[0060] In step 4), a fine material conveyor belt 140 is provided below the primary vibrating screen 120, through which the fine material is conveyed to the receiving hopper 220. Thus, the multi-level vibrating screen 210 includes a secondary vibrating screen and multiple layers of screens. The fine material is transported obliquely upwards through the receiving hopper 220 to the top opening of the secondary vibrating screen, where it falls onto the top layer of screens. Correspondingly, each layer of screens has a discharge conveyor belt 240 connected to its bottom. This allows various screened materials of different particle sizes, as well as fine materials, to be piled separately in different accumulation areas on the construction site, facilitating strict measurement according to the mix proportions during batching and ensuring the quality of the bricks.

[0061] The front end of the frame 100 is provided with a feed hopper 160, which is connected to the feed inlet 1100 of the impact crusher 110. The feed inlet 1100 is formed on the upper part of the impact crusher 110, and the crushing zone is formed below the feed inlet 1100.

[0062] In construction step 2), the construction waste is placed in the feed hopper 160, and the construction waste in the feed hopper 160 enters the crushing zone from top to bottom through the feed inlet 1100;

[0063] The primary vibrating screen 120 has a coarse material outlet at its front end, and a coarse material conveyor belt 150 is provided between the coarse material outlet and the feed hopper 160. In step 4), the coarse material discharged from the coarse material outlet is conveyed to the top of the feed hopper 160 via the coarse material conveyor belt 150 and falls onto the feed hopper 160 from top to bottom. In this way, the coarse material can be re-crushed by the impact crusher 110 via the coarse material conveyor belt 150, thereby maximizing resource utilization.

[0064] In a preferred embodiment, an iron remover is also provided between the primary vibrating screen 120 and the discharge port 1101. The iron remover is used to adsorb impurities such as waste steel bars and waste iron wires remaining in the crushed material to ensure the quality of the material.

[0065] The feed inlet 1100 is arranged vertically offset from the crushing zone. A curved feed channel is formed between the feed inlet 1100 and the crushing zone. A sliding bottom wall 1102 is formed at the bottom of the feed channel. The sliding bottom wall 1102 extends downward from the lower end of the feed inlet 1100 to the crushing zone.

[0066] In construction step 2), construction waste enters the feed channel through the feed inlet 1100 and slides downwards along the sliding bottom wall 1102 into the crushing zone. In this way, the construction waste is effectively slowed down by the sliding bottom wall 1102 before rolling downwards into the crushing zone, resulting in more thorough crushing, ensuring crushing quality, and preventing excessive coarse material from remaining in the crushed material.

[0067] The crushing chamber has an impact zone, which is arranged outside the crushing zone. The impact zone extends downward from the upper end of the feed inlet 1100 and is offset from the crushing zone. The feed inlet 1100 and the impact zone are respectively arranged on both sides of the crushing zone.

[0068] Along the counterattack zone from top to bottom, the counterattack zone is provided with multiple counterattack liner plates 112. The multiple counterattack liner plates 112 are arranged in a staggered manner inside and outside, and the adjacent counterattack liner plates 112 are arranged in a staggered and overlapping manner.

[0069] In construction step 2), the construction waste falling into the crushing zone is impacted by multiple rotating hammers 111. Construction waste that deviates into the impact zone is then rebounded back into the crushing zone by multiple impact plates 112. This ensures that after being impacted by the hammers 111, larger pieces of construction waste experience greater force and fly rapidly towards the impact zone. The impact zone counteracts these larger pieces, causing them to rebound back into the crushing zone for further crushing, thus ensuring the quality of the crushing process.

[0070] The impact liner 112 has an impact sidewall facing the crushing zone and a reverse sidewall away from the crushing zone. The middle part of the impact sidewall protrudes outward from the crushing zone, forming a bend. An expansion joint 113 is connected to the reverse sidewall. Along the direction from top to bottom of the impact zone, the expansion joint 113 is arranged downward at an angle. The discharge port 1101 is arranged away from the crushing zone.

[0071] In construction step 2), when the construction waste is deflected into the impact zone by the hammer 111, the construction waste hits the impact sidewall of the impact liner 112 and bounces back into the crushing zone.

[0072] When construction waste impacts the impact wall, the expansion joint 113 drives the impact liner 112 to swing towards the crushing zone, with the bottom of the upper impact liner 112 extending beyond the discharge port 1101. When the construction waste rebounds from the impact wall back into the crushing zone, the expansion joint 113 drives the impact liner 112 to swing away from the crushing zone and reset, with the bottom of the lower impact liner 112 aligned vertically with the discharge port 1101. In this way, construction waste impacting the upper impact liner 112 will rebound back into the crushing zone for further crushing, while construction waste impacting the lower impact liner 112 will be discharged towards the discharge port 1101, ensuring efficient discharge and preventing excessive construction waste in the crushing zone.

[0073] In this embodiment, a rotating head 114 is hinged to the side wall of the impact chamber. The rotating head 114 is provided with a plurality of stirring arms 115. The inner end of the stirring arm 115 is fixedly connected to the rotating head 114, and the outer end of the stirring arm 115 extends toward the crushing zone. The plurality of stirring arms 115 surround to form a stirring area. An elastic layer 116 is provided at the bottom of the stirring area. The elastic layer 116 is fixedly connected to the rotating head 114 and is respectively connected to the inner end of the plurality of stirring arms 115.

[0074] In construction step 2), when construction waste impacts the impact liner 112 and the expansion joint 113 drives the impact liner 112 to swing, multiple mixing arms 115 rotate with the rotating head 114, rotating and mixing the construction waste impacting the impact liner 112. Meanwhile, the elastic layer 116 rebounds the construction waste back into the crushing zone. Thus, the elastic layer 116 acts as a force-dissipating element, and the expansion joint 113 drives the impact liner 112 to swing, increasing the rebound speed of the construction waste. Simultaneously, during this process, the mixing arms 115, under the rotation of the rotating head 114, repeatedly impact the construction waste, promoting crushing and improving crushing efficiency.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction method for the resource utilization of construction waste through multi-stage crushing and screening, characterized in that: The construction steps include the following: 1) Transport construction waste to the crushing station; 2) The crushing station has an impact crusher, which has a crushing chamber. The impact crusher is provided with an inlet and an outlet that communicate with the crushing chamber. The crushing chamber has a crushing zone, which is provided with multiple concentrically rotating hammers. The outer side of the crushing zone is provided with an impact liner. The construction waste is fed into the crushing zone through the inlet. Multiple hammers rotate and impact the construction waste, and the impact liner bounces the construction waste that deviates from the crushing zone back into the crushing zone until the impact crusher crushes the construction waste into crushed material, which is then discharged through the outlet. 3) The crushed material is conveyed to a single-layer primary vibrating screen, where it is screened into coarse and fine materials. 4) The fine material is conveyed to the screening station, which has a multi-level vibrating screen. The fine material is screened from top to bottom through the multi-level vibrating screen to form a variety of screening materials with different particle sizes that are sequentially intercepted by the multi-level vibrating screen, as well as powder material that passes through the multi-level vibrating screen. The various screening materials are separated and output. The multi-level vibrating screen has three layers of screens. The first layer screens the crushed stone, the second layer screens the medium sand-sized material, and the third layer screens the fine sand-sized material. The impact liner has an impact sidewall facing the crushing zone and a back sidewall away from the crushing zone. The middle part of the impact sidewall protrudes outward from the crushing zone, forming a bend. The crushing chamber has an impact zone. An expansion joint is connected to the back sidewall. Along the direction from top to bottom of the impact zone, the expansion joint is arranged at a downward inclination. The discharge port is located off-center from the crushing zone; In construction step 2), when the construction waste is deflected into the impact zone by the hammer, the construction waste impacts the impact sidewall of the impact liner and bounces back into the crushing zone. When the construction waste impacts the impact sidewall, the telescopic device drives the impact liner to swing toward the crushing zone, and the bottom of the impact liner above the impact zone passes over the discharge port. When the construction waste is bounced back into the crushing zone by the impact sidewall, the telescopic device drives the impact liner to swing away from the crushing zone and reset. The bottom of the impact liner at the bottom of the impact zone is arranged vertically aligned with the discharge port. A rotating head is hinged to the side wall of the impact chamber. The rotating head is provided with multiple stirring arms. The inner end of the stirring arm is fixedly connected to the rotating head, and the outer end of the stirring arm extends toward the crushing zone. The multiple stirring arms enclose a stirring area. The bottom of the stirring area is provided with an elastic layer. The elastic layer is fixedly connected to the rotating head and is connected to the inner end of each of the multiple stirring arms. In construction step 2), when the construction waste impacts the impact liner and the telescopic device drives the impact liner to swing, multiple mixing arms rotate with the rotating head to rotate and mix the construction waste impacting the impact liner, and the elastic layer rebounds the construction waste back to the crushing zone.

2. The construction waste multi-stage crushing, screening, and resource utilization method as described in claim 1, characterized in that, The crushing station is equipped with a frame, and the bottom of the frame is equipped with a traveling track. The impact crusher is mounted on the frame.

3. The construction waste multi-stage crushing, screening, and resource utilization method as described in claim 2, characterized in that, The primary vibrating screen is mounted on the frame, and the impact crusher and the primary vibrating screen are arranged sequentially along the front-back direction of the frame.

4. The construction waste multi-stage crushing, screening, and resource utilization method as described in claim 1, characterized in that, The discharge port is located at the bottom of the impact crusher, and the discharge port is connected to the top of the primary vibrating screen via a primary conveyor belt. In construction step 2), the crushed material discharged from the outlet falls onto the primary conveyor belt, is transported by the primary conveyor belt to the top of the primary vibrating screen, and falls from top to bottom onto the primary vibrating screen.

5. The construction waste multi-stage crushing, screening, and resource utilization method as described in claim 2, characterized in that, The screening station is equipped with a receiving hopper, and multiple layers of secondary vibrating screens are arranged at intervals from top to bottom, and the multiple layers of secondary vibrating screens are arranged at an angle; a secondary conveyor belt is provided between the receiving hopper and the top of the multi-layer vibrating screens; Each of the secondary vibrating screens in each layer is provided with a discharge conveyor belt at its lower end, and the discharge conveyor belt is arranged at an upward inclination along the transmission direction of the discharge conveyor belt. In construction step 4), the fine material is placed in the receiving hopper, and the fine material in the receiving hopper is transported to the top of the multi-level vibrating screen through the secondary conveyor belt, and falls from top to bottom onto the secondary vibrating screen. The fine material is sequentially sieved through a multi-level vibrating screen from top to bottom to form various sieved materials and powder. The various sieved materials are respectively placed on the multi-level vibrating screen and are correspondingly transported to multiple discharge conveyor belts by multiple secondary vibrating screens for separation and output. The powder falls below the multi-level vibrating screen. In step 4), a fine material conveyor belt is provided below the primary vibrating screen, and the fine material is conveyed to the receiving hopper through the fine material conveyor belt.

6. The construction waste multi-stage crushing, screening, and resource utilization method as described in claim 5, characterized in that, The front end of the frame is provided with a feed hopper, which is connected to the feed inlet of the impact crusher. The feed inlet is formed at the upper part of the impact crusher, and the crushing zone is formed below the feed inlet. In construction step 2), the construction waste is placed in the feed hopper, and the construction waste in the feed hopper enters the crushing zone from top to bottom through the feed inlet; The primary vibrating screen has a coarse material outlet at its front end, and a coarse material conveyor belt is provided between the coarse material outlet and the feed hopper; in step 4), the coarse material discharged from the coarse material outlet is conveyed to the top of the feed hopper by the coarse material conveyor belt and falls from top to bottom onto the feed hopper.

7. The construction waste multi-stage crushing, screening, and resource utilization method as described in claim 1, characterized in that, The feed inlet is offset vertically from the crushing zone. A curved feed channel is formed between the feed inlet and the crushing zone. A sliding bottom wall is formed at the bottom of the feed channel. The sliding bottom wall extends downward from the lower end of the feed inlet to the crushing zone. In construction step 2), the construction waste enters the feed channel through the feed inlet and slides down the bottom wall of the material sliding channel into the crushing zone.

8. The construction waste multi-stage crushing, screening, and resource utilization method as described in claim 1, characterized in that, The impact zone is arranged outside the crushing zone, extending downward from the upper end of the feed inlet and offset from the crushing zone; the feed inlet and the impact zone are respectively arranged on both sides of the crushing zone. Along the top-to-bottom direction of the counterattack zone, the counterattack zone is provided with multiple counterattack liners, the multiple counterattack liners are arranged in a staggered manner inside and out, and the adjacent counterattack liners are arranged in a staggered and overlapping manner. In construction step 2), the construction waste falling into the crushing zone is impacted by the rotating hammers of multiple hammers. The construction waste that deviates to the impact zone is bounced back into the crushing zone by multiple impact plates.

Images