Waste separation equipment for civil engineering construction and separation method thereof

Abstract

The invention belongs to the technical field of waste separation, and particularly relates to waste separation equipment for civil engineering construction and a separation method thereof.The waste separation equipment comprises a separation main body and further comprises a bubble impact type air flotation mechanism and a slag scraping mechanism, the bubble impact type air flotation mechanism is arranged in the separation main body, and the slag scraping mechanism is arranged in the separation main body; the bubble impact type air flotation mechanism comprises a through type driving assembly, a bubble cavitation assembly and a foaming generation assembly, the through type driving assembly is arranged at the top end of the interior of the separation main body, the bubble cavitation assembly is arranged on the through type driving assembly, and the foaming generation assembly is arranged in the separation main body; according to the bubble impact type air flotation mechanism, inorganic substances such as concrete particles, mortar fragments and brick and tile fragments and organic substances such as plastic fragments and paper scraps can be effectively separated from waste materials by utilizing the adhesion of micro bubbles, and the separation mode not only improves the separation efficiency, but also ensures the separation accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of waste separation, and specifically refers to waste separation equipment and a separation method for civil engineering construction. Background Art

[0002] Civil engineering construction waste refers to waste generated during construction, demolition, and maintenance, including concrete blocks, mortar fragments, brick and tile fragments, wood fragments, plastic films, paper scraps, and other materials. These wastes not only occupy a large amount of land resources, but may also pollute the environment. Therefore, it is of great significance to effectively separate and reuse them.

[0003] Traditional civil engineering construction waste separation devices mostly use screening, magnetic separation and other methods. These methods are more effective for separating material particles with large density differences, but are often not effective for separating material particles with similar density but different surface properties, such as fine concrete particles and plastic fragments. This is because the screening method mainly relies on the size of the material particles for separation, while the magnetic separation method relies on the magnetism of the material particles for separation, and neither method can fully consider the differences in the surface properties of the material particles. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a civil engineering construction waste separation device and a separation method thereof.

[0005] The technical solution adopted by the present invention is as follows: The present invention provides a waste separation device for civil engineering construction, including a separation body, a bubble impact type flotation mechanism and a scraping mechanism, the bubble impact type flotation mechanism is arranged in the separation body, and the scraping mechanism is arranged in the separation body; the bubble impact type flotation mechanism includes a through-type drive component, a bubble cavitation component and a foaming generating component, the through-type drive component is arranged on the internal top of the separation body, the bubble cavitation component is arranged on the through-type drive component, and the foaming generating component is arranged in the separation body.

[0006] Furthermore, the separation body includes a separation platform, a lifting cylinder is provided at the internal bottom end of the separation platform, a lifting block is provided at the output end of the lifting cylinder, a foam separation chamber is provided in the separation platform, a partition is provided on the inner side wall of the foam separation chamber, a support net is provided in the partition, the support net is connected to the flotation separation chamber above, and a columnar net is provided on the support net.

[0007] Furthermore, the through-type drive assembly includes a cavitation cavity, which is arranged at the outer bottom end of the lifting block, and an equipment cavity is arranged at the lower end of the cavitation cavity. A motor is arranged at the inner top end of the equipment cavity, and a gear 1 is arranged at the output end of the motor. A driving tube is rotatably sleeved on the bottom end of the equipment cavity, and a gear 2 is sleeved on the driving tube. The gears 1 and 2 are meshed and rotatably connected. A bearing is arranged at the inner top end of the equipment cavity, and the top end of the driving tube is connected to the inner ring of the bearing. A sealing ring is arranged on the outer ring of the bearing, and the sealing ring is rotatably sleeved on the outer wall of the driving tube. A water spray hole is opened on the side wall of the driving tube.

[0008] Furthermore, the bubble cavitation component includes an ultrasonic generator, which is arranged at the internal bottom end of the bubble cavitation component, the outer side wall of the cavitation chamber is connected to one end of a connecting pipe, and the other end of the connecting pipe is connected to the outer ring of a bearing, and a water pump is provided at the inner top of the lifting block, the output end of the water pump is connected to one end of an output pipe, and the other end of the output pipe is connected to the upper end of the bubble cavitation component, the input end of the water pump is connected to one end of a water suction hose, and the other end of the water suction hose is connected to the outer side wall of the flotation separation chamber.

[0009] Furthermore, the foaming generating component includes a nitrogen storage tank, which is arranged at one end of the interior of the separation table, the output end of the foaming generating component is connected to one end of the output pipe 2, the other end of the output pipe 2 is connected to the bubble disk, and the bubble disk is arranged below the support net, the output pipe 2 is provided with a pressure reducing valve, the output pipe 2 is provided with an electronic valve 2, and the electronic valve 2 is arranged on one side of the pressure reducing valve.

[0010] Furthermore, the scraping mechanism includes a transverse pushing assembly and a water adding assembly. The transverse pushing assembly is arranged on one side of the upper end of the separation table, and the water adding assembly is arranged on the other side inside the separation table.

[0011] Furthermore, the transverse push assembly includes a telescopic cylinder, which is arranged on one side of the upper end of the separation table. A scraper is provided at the output end of the telescopic cylinder, and a rubber pad is provided at the lower end of the scraper.

[0012] Furthermore, the water adding assembly includes a water tank, which is arranged on the other side of the separation table. A water pump 2 is provided at the lower end of the outer wall of the water tank. The water pumping end of the water pump 2 is arranged at the inner bottom end of the water tank. The output end of the water pump 2 is connected to one end of a water pipe. The other end of the water pipe is arranged at the inner bottom end of the foam separation chamber. An electronic valve 1 is provided on the water pipe.

[0013] Furthermore, the front side of the air flotation separation chamber is opened and closed with a sealed opening and closing door 2, the front side of the separation platform is opened and closed with a sealed opening and closing door 1, and the outer side wall of the separation platform is provided with a drain valve, and the water outlet end of the drain valve is arranged at the inner bottom end of the air flotation separation chamber.

[0014] The present invention also discloses a separation method of a waste separation device for civil engineering construction, which mainly comprises the following steps:

[0015] Step 1: First open the sealed opening and closing door 1 and the sealed opening and closing door 2, put the construction waste into the air flotation separation chamber, close the sealed opening and closing door 1 and the sealed opening and closing door 2, and inject water into the air flotation separation chamber from the upper end of the air flotation separation chamber. When the water is higher than the cylindrical net, stop, and the output end of the lifting cylinder moves downward to drive the lifting block to move downward, and insert the driving pipe into the cylindrical net;

[0016] Step 2: Start the water pump 1, and let the water in the air flotation separation chamber enter the bubble cavitation component through the water pump hose and the output pipe 1. Use the cavitation effect generated by the ultrasonic generator to generate tiny bubbles in the water flow, and at the same time destroy the double-layer spherical symmetric structure of the particles in the liquid, and generate a dipole moment, which causes the particles to destabilize and condense and increase, which is beneficial to the separation of the particles. The water treated by the ultrasonic generator enters the driving pipe and is sprayed out through the water spray hole. The rotation of the motor output end drives the gear 1 to rotate, the rotation of the gear 1 drives the gear 2 to rotate, the rotation of the gear 2 drives the driving pipe to rotate, and the rotation of the driving pipe drives the water spray hole to rotate. The water flow impacts the surface of the engineering construction waste, which is beneficial to the separation of the particles on the surface of the engineering construction waste;

[0017] Step 3: Open the pressure reducing valve and the second electronic valve, and the nitrogen compressed in the foaming component enters the bubble disk through the output pipe 2, and enters the air flotation separation chamber from the support net in the form of tiny bubbles, and adsorbs inorganic substances such as tiny concrete particles, mortar fragments, brick and tile fragments, and organic substances such as plastic fragments and paper scraps on the bubbles and floats to the water surface to form a foam layer. These suspended solids usually have a higher specific surface area and a lower density, and are easy to adhere to the bubbles;

[0018] Step 4: After the separation is completed, start the water pump 2, inject the water in the water tank into the bottom end of the foam separation chamber, and then enter the air flotation separation chamber. The water surface in the air flotation separation chamber floats up. When the foam layer rises to the port of the air flotation separation chamber, the output end of the telescopic cylinder moves to drive the scraper to move, and the scraper movement drives the rubber pad to move, pushing the foam layer into the foam separation chamber, opening the sealed opening and closing door 1 to complete the collection, and finally opening the water release valve to release the water in the foam separation chamber.

[0019] The beneficial effects achieved by the present invention using the above structure are as follows:

[0020] (1) The bubble impact flotation mechanism utilizes the adhesion of tiny bubbles to effectively separate inorganic substances such as concrete particles, mortar fragments, brick and tile fragments, and organic substances such as plastic fragments and paper scraps from waste. This separation method not only improves the separation efficiency, but also ensures the accuracy of separation.

[0021] (2) The setting of the foaming component. Nitrogen is chemically stable and is not easy to react chemically with other substances, thus avoiding chemical pollution that may be generated during the flotation process. Nitrogen has a low solubility in liquid, so it is easier to form stable bubbles and improve the flotation efficiency.

[0022] (3) The setting of the bubble cavitation component can destroy the spherical symmetric structure of the double electric layer of particles in the liquid and generate a dipole moment, which causes the particles to destabilize and condense and increase in size, which is beneficial to the separation of particles.

[0023] (4) The high-frequency vibration of the ultrasonic generator can create many tiny cavities inside the liquid. These cavities expand and burst rapidly under the action of ultrasonic waves, forming tiny bubbles, which can further accelerate the floating of suspended matter.

[0024] (5) The cavitation effect of the ultrasonic generator can form a local environment of high temperature and high pressure in the water body, which is beneficial to the degradation of chemical pollutants and the enhancement of mass transfer process, thereby improving the effect of flotation separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 This is a front view of a waste separation device for civil engineering and construction of the present invention;

[0027] Figure 2 This is a front cross-sectional view of a waste separation device for civil engineering construction of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the air flotation separation chamber;

[0029] Figure 4 It is a top view of the separation platform;

[0030] Figure 5 It is a schematic diagram of the equipment cavity structure;

[0031] Figure 6 for Figure 2 A partial enlarged view of part A;

[0032] Figure 7 for Figure 2 A partial enlarged view of part B.

[0033] Among them, 1. separation body, 2. bubble impact flotation mechanism, 3. scraping mechanism, 4. sealed opening and closing door 1, 5. sealed opening and closing door 2, 6. drain valve, 7. separation platform, 8. lifting cylinder, 9. lifting block, 10. foam separation chamber, 11. flotation separation chamber, 12. partition, 13. support net, 14. cylindrical net, 15. through-type drive component, 16. bubble cavitation component, 17. foaming component, 18. cavitation chamber, 19. equipment chamber, 20. motor, 21. gear 1, 22. gear 2, 23. Drive pipe, 24. Water spray hole, 25. Bearing, 26. Sealing ring, 27. Ultrasonic generator, 28. Connecting pipe, 29. Water pump one, 30. Output pipe one, 31. Suction hose, 32. Nitrogen storage tank, 33. Output pipe two, 34. Bubble disk, 35. Pressure reducing valve, 36. Horizontal thrust assembly, 37. Water adding assembly, 38. Telescopic cylinder, 39. Scraper, 40. Rubber pad, 41. Water tank, 42. Water pump two, 43. Water pipe, 44. Electronic valve one, 45. Electronic valve two. DETAILED DESCRIPTION

[0034] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0035] like Figure 1-Figure 7As shown, the present invention proposes a waste separation device for civil engineering construction, including a separation body 1, the separation body 1 includes a separation platform 7, the inner bottom end of the separation platform 7 is provided with a lifting cylinder 8, the output end of the lifting cylinder 8 is provided with a lifting block 9, a foam separation chamber 10 is provided in the separation platform 7, the inner side wall of the foam separation chamber 10 is provided with a partition 12, a support net 13 is provided in the partition 12, the upper part of the support net 13 is connected to the flotation separation chamber 11, the front side opening and closing of the flotation separation chamber 11 is provided with a sealed opening and closing door 2 5, the front side opening and closing of the separation platform 7 is provided with a sealed opening and closing door 1 4, a drain valve 6 is provided on the outer side wall of the separation platform 7, a columnar net 14 is provided on the support net 13, and also includes a bubble impact type flotation mechanism 2 and a scraping mechanism 3, the bubble impact type flotation mechanism 2 is arranged in the separation body 1, and the scraping mechanism 3 is arranged In the separation body 1, the scraping mechanism 3 includes a horizontal push component 36 and a water adding component 37. The horizontal push component 36 is arranged on one side of the upper end of the separation platform 7. The horizontal push component 36 includes a telescopic cylinder 38. The telescopic cylinder 38 is arranged on one side of the upper end of the separation platform 7. The output end of the telescopic cylinder 38 is provided with a scraper 39, and the lower end of the scraper 39 is provided with a rubber pad 40. The water adding component 37 is arranged on the other side of the separation platform 7. The water adding component 37 includes a water tank 41. The water tank 41 is arranged on the other side of the separation platform 7. A water pump 42 is provided at the lower end of the outer wall of the water tank 41. The water pumping end of the water pump 42 is arranged at the inner bottom end of the water tank 41. The output end of the water pump 42 is connected to one end of a water pipe 43. The other end of the water pipe 43 is arranged at the inner bottom end of the foam separation chamber 10. An electronic valve 44 is provided on the water pipe 43.The bubble impact air flotation mechanism 2 includes a through-type drive component 15, a bubble cavitation component 16 and a foaming component 17. The through-type drive component 15 is arranged at the internal top end of the separation body 1. The through-type drive component 15 includes a cavitation chamber 18. The cavitation chamber 18 is arranged at the external bottom end of the lifting block 9. The lower end of the cavitation chamber 18 is provided with an equipment chamber 19. The internal top end of the equipment chamber 19 is provided with a motor 20. The output end of the motor 20 is provided with a gear 21. The bottom end of the equipment chamber 19 is rotatably sleeved with a drive tube 23, and the drive tube 23 is sleeved with a gear The gear 1 21 and the gear 2 22 are meshed and connected to each other for rotation. A bearing 25 is provided at the top of the inner part of the equipment cavity 19. The top of the driving tube 23 is connected to the inner ring of the bearing 25. A sealing ring 26 is provided at the outer ring of the bearing 25. The sealing ring 26 is rotatably sleeved on the outer wall of the driving tube 23. A water spray hole 24 is provided on the side wall of the driving tube 23. The bubble cavitation component 16 is arranged on the through-type driving component 15. The bubble cavitation component 16 includes an ultrasonic generator 27. The ultrasonic generator 27 is arranged at the bottom of the bubble cavitation component 16. The outer wall of the cavitation chamber 18 is connected to one end of the connecting pipe 28, and the other end of the connecting pipe 28 is connected to the outer ring of the bearing 25. A water pump 29 is provided at the top of the lifting block 9. The output end of the water pump 29 is connected to one end of the output pipe 30, and the other end of the output pipe 30 is connected to the upper end of the bubble cavitation component 16. The input end of the water pump 29 is connected to one end of the water suction hose 31, and the other end of the water suction hose 31 is connected to the outer wall of the air flotation separation chamber 11. The foaming component 17 is arranged on the separation main In the body 1, the foaming component 17 includes a nitrogen storage tank 32, which is arranged at one end of the separation platform 7. The output end of the foaming component 17 is connected to one end of the output pipe 33, and the other end of the output pipe 33 is connected to the bubble plate 34. The bubble plate 34 is arranged below the support net 13. The output pipe 33 is provided with a pressure reducing valve 35, and the output pipe 33 is provided with an electronic valve 45. The electronic valve 45 is arranged on one side of the pressure reducing valve 35. The water outlet end of the drain valve 6 is arranged at the bottom end of the air flotation separation chamber 11. ;

[0036] When in use, the sealed opening and closing door 14 and the sealed opening and closing door 25 are first opened, and the construction waste is placed in the air flotation separation chamber 11. The sealed opening and closing door 14 and the sealed opening and closing door 25 are closed, and water is injected into the air flotation separation chamber 11 from the upper end of the air flotation separation chamber 11. When the water is higher than the cylindrical net 14, the water is stopped, and the output end of the lifting cylinder 8 moves downward to drive the lifting block 9 to move downward, and the driving pipe 23 is inserted into the cylindrical net 14. The water pump 129 is started, and the water in the air flotation separation chamber 11 enters the bubble cavitation component 16 through the water pump hose 31 and the output pipe 130, and the ultrasonic generator is used. The cavitation produced by 27 produces tiny bubbles in the water flow, and at the same time destroys the double-layer spherical symmetric structure of the particles in the liquid, and produces a dipole moment, which causes the particles to destabilize and condense and increase, which is beneficial to the separation of the particles. The ultrasonic generator 27 enters the driving tube 23 after processing, and is sprayed out through the water spray hole 24. The output end of the motor 20 rotates to drive the gear 1 21 to rotate, the gear 1 21 rotates to drive the gear 2 22 to rotate, the gear 2 22 rotates to drive the driving tube 23 to rotate, and the driving tube 23 rotates to drive the water spray hole 24 to rotate. The water flow impacts the surface of the engineering construction waste, which is beneficial to the engineering construction waste. To separate the particles on the surface of the waste, open the pressure reducing valve 35 and the electronic valve 45, and the nitrogen compressed in the foaming component 17 enters the bubble disk 34 through the output pipe 33, and enters the air flotation separation chamber 11 from the support net 13 in the form of tiny bubbles, and adsorbs the tiny concrete particles, mortar fragments, brick and tile fragments and other inorganic substances, as well as plastic fragments, paper scraps and other organic substances on the bubbles and floats to the water surface to form a foam layer. These suspended solids usually have a higher specific surface area and a lower density, and are easy to adhere to the bubbles. After the separation is completed, start the water pump 4 2. Inject the water in the water tank 41 into the inner bottom end of the foam separation chamber 10, and then enter the air flotation separation chamber 11. The water surface in the air flotation separation chamber 11 floats up. When the foam layer rises to the port of the air flotation separation chamber 11, the output end of the telescopic cylinder 38 moves to drive the scraper 39 to move, and the movement of the scraper 39 drives the rubber pad 40 to move, pushing the foam layer into the foam separation chamber 10, opening the sealed opening and closing door 4 to complete the collection, and finally opening the water release valve 6 to release the water in the nonsense foam separation chamber 10. The above is the overall working process of the present invention. Repeat this step when you use it next time.

[0037] It can be seen from the above embodiments that the beneficial effects of the present invention are:

[0038] The bubble impact flotation mechanism is set up, and the adhesion of tiny bubbles is utilized to effectively separate inorganic substances such as concrete particles, mortar fragments, brick and tile fragments, and organic substances such as plastic fragments and paper scraps from waste materials. This separation method not only improves the separation efficiency, but also ensures the accuracy of separation. The setting of the foaming component makes nitrogen chemically stable and not easy to react chemically with other substances, thereby avoiding chemical pollution that may be generated during the flotation process. The solubility of nitrogen in liquid is low, so it is easier to form stable bubbles, thereby improving the flotation efficiency. The setting of the bubble cavitation component can destroy the double electric layer spherical symmetry structure of particles in the liquid and generate a dipole moment, causing the particles to destabilize and condense and increase, which is beneficial to the separation of particles. The high-frequency vibration of the ultrasonic generator can generate many tiny cavities inside the liquid. These cavities expand and burst rapidly under the action of ultrasonic waves to form tiny bubbles, which can further accelerate the floating of suspended matter. The cavitation effect of the ultrasonic generator can form a local environment of high temperature and high pressure in the water body, which is beneficial to the degradation of chemical pollutants and the strengthening of mass transfer process, thereby improving the effect of flotation separation.

[0039] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A waste separation device for civil engineering construction, comprising a separation body (1), characterized in that : It also includes a bubble impact type flotation mechanism (2) and a scraping mechanism (3), wherein the bubble impact type flotation mechanism (2) is arranged in the separation body (1), and the scraping mechanism (3) is arranged in the separation body (1); the bubble impact type flotation mechanism (2) includes a through-type drive component (15), a bubble cavitation component (16) and a foaming generation component (17), wherein the through-type drive component (15) is arranged at the internal top end of the separation body (1), the bubble cavitation component (16) is arranged on the through-type drive component (15), and the foaming generation component (17) is arranged in the separation body (1).

2. The civil engineering construction waste separation equipment according to claim 1, characterized in that: The separation body (1) comprises a separation platform (7), a lifting cylinder (8) is provided at the inner bottom end of the separation platform (7), a lifting block (9) is provided at the output end of the lifting cylinder (8), a foam separation chamber (10) is provided in the separation platform (7), a partition (12) is provided on the inner side wall of the foam separation chamber (10), a support net (13) is provided in the partition (12), the support net (13) is connected to the air flotation separation chamber (11) at the top, and a columnar net (14) is provided on the support net (13).

3. The civil engineering construction waste separation equipment according to claim 2, characterized in that: The through-type driving assembly (15) comprises a cavitation chamber (18), wherein the cavitation chamber (18) is arranged at the outer bottom end of the lifting block (9), and an equipment chamber (19) is arranged at the lower end of the cavitation chamber (18). A motor (20) is arranged at the inner top end of the equipment chamber (19), and a gear 1 (21) is arranged at the output end of the motor (20). A driving tube (23) is rotatably sleeved at the bottom end of the equipment chamber (19), and a gear 2 (22) is sleeved on the driving tube (23). The gear 1 (21) and the gear 2 (22) are meshed and rotatably connected. A bearing (25) is arranged at the inner top end of the equipment chamber (19), and the top end of the driving tube (23) is connected to the inner ring of the bearing (25). A sealing ring (26) is arranged on the outer ring of the bearing (25), and the sealing ring (26) is rotatably sleeved on the outer wall of the driving tube (23). A water spray hole (24) is arranged on the side wall of the driving tube (23).

4. The civil engineering construction waste separation device according to claim 3, characterized in that: The bubble cavitation component (16) comprises an ultrasonic generator (27), and the ultrasonic generator (27) is arranged at the inner bottom end of the bubble cavitation component (16). The outer wall of the cavitation chamber (18) is connected to one end of a connecting pipe (28), and the other end of the connecting pipe (28) is connected to the outer ring of a bearing (25). The inner top end of the lifting block (9) is provided with a water pump (29), and the output end of the water pump (29) is connected to one end of an output pipe (30), and the other end of the output pipe (30) is connected to the upper end of the bubble cavitation component (16). The input end of the water pump (29) is connected to one end of a water suction hose (31), and the other end of the water suction hose (31) is connected to the outer wall of the air flotation separation chamber (11).

5. The civil engineering construction waste separation device according to claim 4, characterized in that: The foaming component (17) comprises a nitrogen storage tank (32), which is arranged at one end inside the separation table (7); the output end of the foaming component (17) is connected to one end of the second output pipe (33); the other end of the second output pipe (33) is connected to a bubble disk (34); the bubble disk (34) is arranged below the support net (13); a pressure reducing valve (35) is arranged on the second output pipe (33); an electronic valve (45) is arranged on the second output pipe (33); the electronic valve (45) is arranged on one side of the pressure reducing valve (35).

6. The equipment for separating waste from civil engineering and construction according to claim 5, characterized in that: The scraping mechanism (3) comprises a horizontal pushing assembly (36) and a water adding assembly (37), wherein the horizontal pushing assembly (36) is arranged on one side of the upper end of the separation table (7), and the water adding assembly (37) is arranged on the other side inside the separation table (7).

7. The civil engineering construction waste separation device according to claim 6, characterized in that: The horizontal push assembly (36) comprises a telescopic cylinder (38), wherein the telescopic cylinder (38) is arranged on one side of the upper end of the separation platform (7), a scraper (39) is arranged at the output end of the telescopic cylinder (38), and a rubber pad (40) is arranged at the lower end of the scraper (39).

8. The equipment for separating waste from civil engineering and construction according to claim 7, characterized in that: The water adding assembly (37) comprises a water tank (41), the water tank (41) being arranged at the other side of the separation platform (7), a water pump (42) being arranged at the lower end of the outer wall of the water tank (41), a water pump (42) being arranged at the inner bottom end of the water tank (41), an output end of the water pump (42) being connected to one end of a water pipe (43), the other end of the water pipe (43) being arranged at the inner bottom end of the foam separation chamber (10), and an electronic valve (44) being arranged on the water pipe (43).

9. The civil engineering construction waste separation device according to claim 8, characterized in that: The front side of the air flotation separation chamber (11) is opened and closed with a sealed opening and closing door 2 (5), the front side of the separation platform (7) is opened and closed with a sealed opening and closing door 1 (4), and the outer side wall of the separation platform (7) is provided with a drain valve (6), and the water outlet end of the drain valve (6) is arranged at the inner bottom end of the air flotation separation chamber (11).

10. A separation method for a waste separation device for civil engineering construction, characterized in that: The civil engineering construction waste separation device according to claim 9 comprises the following steps: Step 1: first open the sealed opening and closing door 1 (4) and the sealed opening and closing door 2 (5), put the construction waste into the air flotation separation chamber (11), close the sealed opening and closing door 1 (4) and the sealed opening and closing door 2 (5), and inject water into the air flotation separation chamber (11) from the upper end of the air flotation separation chamber (11). When the water level is higher than the cylindrical net (14), stop, the output end of the lifting cylinder (8) moves downward to drive the lifting block (9) to move downward, and insert the driving pipe (23) into the cylindrical net (14); Step 2: Start the water pump 1 (29), and let the water in the air flotation separation chamber (11) enter the bubble cavitation component (16) through the water pump hose (31) and the output pipe 1 (30). The cavitation effect generated by the ultrasonic generator (27) is used to generate tiny bubbles in the water flow, and at the same time, the double electric layer spherical symmetric structure of the particles in the liquid is destroyed, and a dipole moment is generated, causing the particles to destabilize and condense and increase, which is beneficial to the separation of the particles. The water treated by the ultrasonic generator (27) enters the driving pipe (23) and is sprayed out through the water spray hole (24). The output end of the motor (20) rotates to drive the gear 1 (21), and the gear 1 (21) rotates to drive the gear 2 (22). The gear 2 (22) rotates to drive the driving pipe (23), and the driving pipe (23) rotates to drive the water spray hole (24). The water flow impacts the surface of the engineering construction waste, which is beneficial to the separation of the particles on the surface of the engineering construction waste. Step 3: Open the pressure reducing valve (35) and the second electronic valve (45), and the nitrogen compressed in the foaming generating assembly (17) enters the bubble disk (34) through the second output pipe (33), and enters the air flotation separation chamber (11) from the support net (13) in the form of tiny bubbles, and adsorbs inorganic substances such as tiny concrete particles, mortar fragments, brick and tile fragments, and organic substances such as plastic fragments and paper scraps on the bubbles and floats to the water surface to form a foam layer. These suspended solids usually have a higher specific surface area and a lower density, and are easy to adhere to the bubbles; Step 4: After separation is completed, start the water pump 2 (42) to inject the water in the water tank (41) into the bottom end of the foam separation chamber (10), and then enter the air flotation separation chamber (11). The water surface in the air flotation separation chamber (11) floats up. When the foam layer rises to the port of the air flotation separation chamber (11), the output end of the telescopic cylinder (38) moves to drive the scraper (39), and the movement of the scraper (39) drives the rubber pad (40) to move, pushing the foam layer into the foam separation chamber (10). The sealed opening and closing door 1 (4) is opened to complete the collection. Finally, the water release valve (6) is opened to release the water in the nonsense foam separation chamber (10).

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