An impurity separation device for harmless treatment of river sediment

Abstract

The present invention discloses an impurity separation device for harmless treatment of river sediment. By adopting a multi-step method such as metal separation, crushing, screening, flotation, etc. to treat the sediment harmlessly, the impurities in the sediment can be easily separated, the purity of the sediment is effectively improved, the utilization of the sediment is convenient, the influence of impurities on the normal use of the sediment is avoided, the functionality of the equipment is improved, and the larger sand and gravel in the sediment can be separated from the impurities conveniently, thereby avoiding the waste of sand and gravel and improving the separation effect of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection equipment, and in particular to an impurity separation device for harmless treatment of river sediment. Background Art

[0002] In the process of river management, the harmless treatment of sediment is an important part of river management. By separating the sediment and the impurities buried in it, the purity of the sediment is improved, which makes it convenient to use the sediment in construction sites such as buildings and bridges, and avoids the pollution of the river by impurities in the sediment. When treating sediment, the commonly used separation method is screening. By sending the sediment and the impurities buried in it into the screening machine for screening, the small particles of sediment can be directly separated, thereby achieving the purpose of sediment purification and harmless treatment. However, this separation method also has many disadvantages, such as:

[0003] 1. The sediment contains metal objects, which can damage the equipment;

[0004] 2. The paper scraps and small plastic particles contained in the sediment cannot be effectively separated, resulting in low sediment purity;

[0005] 3. The sand and gravel in the mud and sand cannot be separated from metal objects, plastic objects, rubber objects, etc., which easily leads to the waste of sand and gravel resources. In addition, the equipment can only separate small particles of mud and sand, and the functionality of the equipment is poor. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides an impurity separation device for harmless treatment of river sediment.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] An impurity separation device for harmless treatment of river sediment, comprising:

[0009] Magnetic separation unit, used to separate metal objects from sediment;

[0010] A crushing unit is used to introduce the sediment after the metal objects are separated into the crushing unit, and the shredded paper, plastic objects, sand and gravel in the sediment are crushed by the crushing unit;

[0011] The water tank is used to hold water. The crushed sediment is introduced into the water in the water tank to prepare for the subsequent flotation work;

[0012] Vibrating screen, used to screen out objects in the mud and sand that cannot be broken by rubber;

[0013] The air flotation unit is used to introduce air bubbles into the water in the water tank, so that the air bubbles can flot the broken paper scraps and plastic objects in the mud and sand in the water tank, thereby separating the impurities from the mud and sand;

[0014] Aggregate channel, the number of the aggregate channels is two, the bottom of the water tank is inclined, the two aggregate channels are connected and installed on the water tank, one of the aggregate channels is used to collect and gather the filtered sediment, and the other aggregate channel is used to collect and gather the impurities intercepted by the vibrating screen;

[0015] A lifting unit, wherein the number of the lifting units is two, and the two lifting units are respectively connected to the output ends of the two material collecting channels, and the lifting units are used to lift and transport the materials gathered in the material collecting channels to an external collection device;

[0016] The water circulation unit is used to extract the water in the two lifting units and reintroduce it into the water tank, so that the water forms a circulation flow in the water tank, the aggregate channel and the lifting unit, which facilitates the water flow to flush the materials in the aggregate channel into the lifting unit to avoid material deposition.

[0017] More preferably, the side wall of the water tank is connected with a discharge trough plate, and the discharge trough plate is located above the liquid level in the water tank;

[0018] The air flotation unit supplies high-pressure bubble water into the water tank, so that the bubbles can be quickly enlarged or burst after entering the water tank, the amount of water-dissolved bubbles can be increased, and water can be continuously supplied to the inside of the water tank.

[0019] More preferably, the magnetic separation unit comprises a first fixed barrel, a material guide channel and a material discharge channel are arranged at a relatively inclined top of an outer wall of the first fixed barrel, and the material guide channel and the material discharge channel are connected, and an outer end of the material discharge channel is far away from the first fixed barrel, a first motor is arranged on a side wall of the first fixed barrel, a first rotating shaft is arranged at an output end of the first motor, the first rotating shaft is located in the first fixed barrel, a plurality of magnetic plates are arranged in an annular shape on an inner wall of the first fixed barrel, and a connecting rod is connected between the first rotating shaft and the magnetic plates;

[0020] Wherein, the first fixed barrel, the material guiding channel and the material discharging channel are all made of insulating materials.

[0021] More preferably, the pulverizing unit comprises a second fixed barrel connected to the bottom of the material guiding channel, two pulverizing rollers are arranged opposite to each other in the second fixed barrel, and teeth are arranged on the outer walls of the pulverizing rollers.

[0022] More preferably, a rotating ring is rotatably provided at both the front and rear ends of the inner wall of the second fixed barrel, a plurality of scrapers are provided between the two rotating rings, the scrapers are in contact with the inner wall of the second fixed barrel, and the diameter of the two crushing rollers that rotates in the opposite direction to the rotating ring is larger than the diameter of the other crushing roller;

[0023] Wherein, the second fixed bucket is connected to the water tank, and the connecting position is located at the top corner of the water tank.

[0024] More preferably, a second motor is provided on the outer end surface of the second fixed barrel, and a worm is provided at the output end of the second motor, on which three worm wheels are meshed, and the three worm wheels are staggered, wherein two worm wheels located on both sides of the worm are respectively connected to the two crushing rollers for transmission, and the remaining worm wheel is provided with a transmission wheel, which is located in the second fixed barrel and is connected to the inner wall of the circumference of a rotating ring for transmission.

[0025] More preferably, the vibrating screen is tilted and slidably installed on the inner wall of the water tank, the tilting direction of the vibrating screen is perpendicular to the sliding direction of the vibrating screen, and ramps are tiltedly arranged on both the front and rear sides of the top of the vibrating screen, the outer ends of the ramps are fixed on the inner wall of the water tank, and the gap between the vibrating screen and the inner wall of the water tank is blocked by the ramps when the vibrating screen slides;

[0026] A third motor is fixed on the outer wall of the water tank, a turntable is provided at the output end of the third motor, a lever is eccentrically provided on the turntable, a long slot plate is provided on the outer sliding sleeve of the lever, a right-angle slide plate is provided at the bottom of the long slot plate, an outer end of the right-angle slide plate vertically passes through the water tank and is connected to the vibrating screen, and the right-angle slide plate slides relative to the water tank.

[0027] More preferably, the lifting unit includes a lifting cylinder in a vertical state, the bottom of the lifting cylinder is connected to the aggregate channel, a fourth motor is provided at the top of the lifting cylinder, a second rotating shaft is provided at the output end of the fourth motor, the second rotating shaft is located in the lifting cylinder, a spiral plate is provided on the outer wall of the second rotating shaft, and the top of the outer wall of the lifting cylinder is connected to a drainage trough plate.

[0028] More preferably, the flotation unit includes a shunt pipe, the input end of the shunt pipe is connected to the external bubble water forming chamber, and multiple output ends of the shunt pipe are connected to guide pipes, which extend into the water tank and are located at the bottom of the vibrating screen. Multiple through holes are opened on the outer wall of the guide pipe in the water tank.

[0029] More preferably, the water circulation unit includes a water pump installed on the top of the water tank, the output end of the water pump is inserted into the water in the water tank, the input end of the water pump is provided with a tee, the two input ends of the tee are respectively connected to the two lifting cylinders, and the tee and the lifting cylinders are connected through filter holes.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: by adopting a multi-step method such as metal separation, crushing, screening, flotation, etc. to carry out harmless treatment of sediment, the impurities in the sediment can be conveniently separated, the purity of the sediment is effectively improved, the utilization of the sediment is convenient, the influence of impurities on the normal use of the sediment is avoided, the functionality of the equipment is improved, and it is convenient to separate larger sand and gravel in the sediment from the impurities, thereby avoiding the waste of sand and gravel and improving the separation effect of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the structure of the present invention;

[0033] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the magnetic separation unit and the crushing unit;

[0034] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the magnetic separation unit and the crushing unit;

[0035] Figure 4 yes Figure 1 Schematic diagram of the enlarged structure of the medium water tank;

[0036] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of the medium water tank;

[0037] Markings in the attached drawings: 1, magnetic separation unit; 2, crushing unit; 3, water tank; 4, vibrating screen; 5, flotation unit; 6, aggregate channel; 7, lifting unit; 8, water circulation unit; 9, first fixed barrel; 10, guide channel; 11, discharge channel; 12, first motor; 13, first rotating shaft; 14, magnetic plate; 15, connecting rod; 16, second fixed barrel; 17, crushing roller; 18, rotating ring; 19, scraper; 20, second motor; 21, worm; 22, worm gear; 23, transmission wheel; 24, ramp plate; 25, third motor; 26, turntable; 27, lever; 28, long groove plate; 29, right-angle slide plate; 30, lifting cylinder; 31, fourth motor; 32, second rotating shaft; 33, spiral plate; 34, drainage groove plate; 35, shunt pipe; 36, guide pipe; 38, water pump; 39, three-way pipe. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0039] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0041] like Figures 1 to 5 As shown, an impurity separation device for harmless treatment of river sediment of the present invention comprises:

[0042] Magnetic separation unit 1, used to separate metal objects from sediment;

[0043] The crushing unit 2 is used to crush the silt after the metal objects are separated, and the shredded paper, plastic objects, sand and gravel in the silt are crushed by the crushing unit 2;

[0044] The water tank 3 is used to hold water. The crushed sediment is introduced into the water in the water tank 3 to prepare for the subsequent flotation work.

[0045] Vibrating screen 4, used to screen the rubber and other unbreakable objects in the sediment;

[0046] The air flotation unit 5 is used to introduce air bubbles into the water in the water tank 3, so that the air bubbles can flotate the broken paper scraps, plastics and other objects in the sediment in the water tank 3, so as to separate such impurities from the sediment;

[0047] Aggregate channel 6, the number of the aggregate channel 6 is two, the bottom of the water tank 3 is inclined, the two aggregate channels 6 are connected and installed on the water tank 3, one of the aggregate channels 6 is used to collect and gather the filtered sediment, and the other aggregate channel 6 is used to collect and gather the impurities intercepted by the vibrating screen 4;

[0048] Lifting units 7, the number of which is two, and the two lifting units 7 are respectively connected to the output ends of the two material collecting channels 6, and the lifting units 7 are used to lift and transport the materials gathered in the material collecting channels 6 to an external collection device;

[0049] The water circulation unit 8 is used to extract the water in the two lifting units 7 and reintroduce it into the water tank 3, so that the water forms a circulation flow in the water tank 3, the aggregate channel 6 and the lifting unit 7, which facilitates the water flow to flush the materials in the aggregate channel 6 into the lifting unit 7 to avoid material deposition.

[0050] It can be seen that the bottom of the aggregate channel 6 is set to be inclined toward the lifting unit 7, so that the material in the aggregate channel 6 can quickly enter the lifting unit 7, and the flotation unit 5 is located below the vibrating screen 4, so that the bubbles can be broken into small bubbles with the help of the vibrating screen 4, thereby increasing the bubble coverage area and improving the flotation effect of the bubbles. Through the screening work of the vibrating screen 4, objects with a smaller specific gravity can be conveniently moved to the surface layer of the mud and sand on the upper surface of the vibrating screen 4, thereby facilitating the flotation separation of bubbles.

[0051] In actual use, the silt extracted from the river channel is poured into the magnetic separation unit 1, which separates the metal objects in it, and then the silt enters the crushing unit 2, which crushes the shredded paper, plastic objects and other easily crushed impurities in the silt, and crushes the sand and gravel at the same time. The crushed silt is poured into the water tank 3. Since the impurities in the river channel are deposited at the bottom of the river channel or buried in the silt, the impurities in the silt cannot be effectively separated by the water in the water tank 3 alone, and the screening separation work of the vibrating screen 4 and the air flotation separation work of the air flotation unit 5 are required. The bubbles can carry the crushed impurities such as shredded paper and plastic to the liquid surface, and the mud and sand sink to the inclined surface at the bottom of the water tank 3. The vibrating screen 4 intercepts the impurities such as larger rubber objects that cannot be crushed. The mud and sand and the impurities on the vibrating screen 4 can be respectively discharged through the two aggregate channels 6 and the two lifting units 7, thereby completing the impurity separation and harmless treatment of the mud and sand. At the same time, by setting up the water circulation unit 8, the water in the water tank 3, the aggregate channel 6 and the lifting unit 7 can be easily made to circulate in one direction, so as to avoid the blockage of the aggregate channel 6 by the impact of the water flow.

[0052] By adopting a multi-step method such as metal separation, crushing, screening, flotation, etc. to carry out harmless treatment of sediment, the impurities in the sediment can be easily separated, the purity of the sediment is effectively improved, the utilization of the sediment is convenient, the impurities are avoided from affecting the normal use of the sediment, the functionality of the equipment is improved, and the larger sand and gravel in the sediment can be separated from the impurities, thereby avoiding the waste of sand and gravel and improving the separation effect of the equipment.

[0053] More preferably, the side wall of the water tank 3 is connected with a discharge trough plate, and the discharge trough plate is located above the liquid level in the water tank 3;

[0054] The air flotation unit 5 supplies high-pressure bubble water into the water tank 3 , so that the bubbles can be rapidly enlarged or burst after entering the water tank 3 , thereby increasing the amount of water-dissolved bubbles and facilitating continuous supply of water into the water tank 3 .

[0055] It can be seen that by using high-pressure bubble water, the number of bubbles in the water tank 3 can be increased, thereby improving the flotation effect, and by synchronously supplying water to the water tank 3, the liquid level in the water tank 3 can be conveniently raised, and the impurities floating on the liquid surface can overflow through the discharge chute plate to the external collection device, thereby facilitating the continuous discharge of the floating impurities and facilitating the subsequent separate treatment of the discharged floating impurities and water.

[0056] In order to prevent the silt from floating in the water and being discharged through the discharge chute, the vibration and floating of the vibrating screen 4 can be reduced to allow the silt to settle slowly.

[0057] More preferably, the magnetic separation unit 1 includes a first fixed barrel 9, a guide channel 10 and a discharge channel 11 are relatively inclinedly arranged on the top of the outer wall of the first fixed barrel 9, and the guide channel 10 and the discharge channel 11 are connected, and the outer end of the discharge channel 11 is far away from the first fixed barrel 9, a first motor 12 is arranged on the side wall of the first fixed barrel 9, and a first rotating shaft 13 is arranged at the output end of the first motor 12, and the first rotating shaft 13 is located in the first fixed barrel 9, and a plurality of magnetic plates 14 are arranged in an annular shape on the inner wall of the first fixed barrel 9, and a connecting rod 15 is connected between the first rotating shaft 13 and the magnetic plate 14;

[0058] The first fixed barrel 9, the material guiding channel 10 and the material discharging channel 11 are all made of insulating materials.

[0059] It can be seen that when the silt is introduced into the guide channel 10, the magnetic plate 14 can adsorb the metal objects in the silt on the inner wall of the guide channel 10, and the silt can flow obliquely downward along the guide channel 10. The first motor 12 is running, and the first motor 12 drives the first rotating shaft 13, the connecting rod 15 and the magnetic plate 14 to rotate. The magnetic plate 14 adsorbs the metal objects and introduces them into the discharge channel 11. Since the discharge channel 11 is inclined and the opening of the discharge channel 11 is away from the first fixed barrel 9, when the metal objects in the discharge channel 11 gradually move away from the first fixed barrel 9, the metal objects can be naturally discharged along the inclined inner wall of the discharge channel 11. Since the multiple magnetic plates 14 in the first fixed barrel 9 continue to rotate, it is convenient to continuously separate the metal objects in the silt.

[0060] Since the material guide channel 10 and the material discharge channel 11 are relatively inclined and located on the top of the first fixed barrel 9, the mud and sand in the material guide channel 10 flow downward along the inner wall of the material guide channel 10 and cannot enter the material discharge channel 11. By making the first fixed barrel 9, the material guide channel 10 and the material discharge channel 11 with insulating materials, the magnetic adsorption work of the magnetic plate 14 can be avoided from being affected.

[0061] More preferably, the pulverizing unit 2 comprises a second fixed barrel 16 connected to the bottom of the material guiding channel 10 , and two pulverizing rollers 17 are arranged opposite to each other in the second fixed barrel 16 , and teeth are arranged on the outer wall of the pulverizing rollers 17 .

[0062] It can be seen that the mud and sand in the guide channel 10 after the metal is separated flows into between the two crushing rollers 17 in the second fixed barrel 16, so that the two crushing rollers 17 rotate relatively. The two crushing rollers 17 can crush the shredded paper, plastic objects, and sand and gravel in the mud and sand, and the teeth on the crushing rollers 17 can improve the crushing effect.

[0063] More preferably, a rotating ring 18 is rotatably provided at both the front and rear ends of the inner wall of the second fixed barrel 16, a plurality of scrapers 19 are provided between the two rotating rings 18, the scrapers 19 are in contact with the inner wall of the second fixed barrel 16, and the diameter of the crushing roller 17 that rotates in the opposite direction to the rotating ring 18 is larger than the diameter of the other crushing roller 17;

[0064] The second fixed barrel 16 is connected to the water tank 3 , and the connecting position is located at the top corner of the water tank 3 .

[0065] It can be seen that by rotating the two rotating rings 18, the rotating rings 18 drive the scraper 19 to rotate, and the scraper 19 can scrape and clean the inner wall of the second fixed barrel 16, so as to prevent the mud and sand from adhering to the inner wall of the second fixed barrel 16. At the same time, the scraper 19 can push the crushed mud and sand into the water tank 3. By making the connecting position between the second fixed barrel 16 and the water tank 3 located at the top corner of the water tank 3, it is convenient for the mud and sand to flow into the water along one side of the inner wall of the water tank 3 when entering the water tank 3, so that the mud and sand produce impact vibration on the horizontal surface, form ripples horizontally and push the floating impurities on its surface to swim toward the discharge chute plate, so as to facilitate the gathering of impurities.

[0066] By making the two crushing rollers 17 have different diameters, the two crushing rollers 17 can be easily rotated at differential speeds, so that the two crushing rollers 17 can crush the impurities in the mud and sand between them at the same time, thereby improving the crushing effect;

[0067] By making the diameter of the crushing roller 17 that rotates in the opposite direction to the rotating ring 18 larger than the diameter of the other crushing roller 17, when the scraper 19 passes through the bottom opening of the guide channel 10, part of the mud and sand will fall onto the scraper 19. By making the diameter of one crushing roller 17 larger, the corresponding area of ​​the scraper 19 and the crushing roller 17 when the scraper 19 moves can be increased, thereby extending the corresponding time, providing enough time for the mud and sand on the scraper 19 to fall, so that the crushing roller 17 with a larger diameter can catch the falling mud and sand and carry it between the two crushing rollers 17, thereby preventing the mud and sand on the scraper 19 from falling directly to the bottom of the second fixed barrel 16 and causing part of the mud and sand to fail to be crushed.

[0068] More preferably, a second motor 20 is provided on the outer end face of the second fixed barrel 16, and a worm 21 is provided at the output end of the second motor 20. Three worm wheels 22 are meshedly arranged on the worm 21, and the three worm wheels 22 are staggered. Two worm wheels 22 located on both sides of the worm 21 are respectively connected to the two crushing rollers 17 for transmission, and the remaining worm wheel 22 is provided with a transmission wheel 23 for transmission. The transmission wheel 23 is located in the second fixed barrel 16, and the transmission wheel 23 is connected to the inner wall of the circumference of a rotating ring 18 for transmission.

[0069] It can be seen that the worm gear 22 on the smaller diameter crushing roller 17 and the worm gear 22 on the transmission wheel 23 are located on the same side of the worm 21, so that the rotating ring 18 can rotate in the opposite direction to the larger diameter crushing roller 17, and the second motor 20 can drive the three worm gears 22 to rotate synchronously through the worm 21, thereby driving the two crushing rollers 17 and the two rotating rings 18 to rotate synchronously.

[0070] More preferably, the vibrating screen 4 is tilted and slidably installed on the inner wall of the water tank 3, the tilting direction of the vibrating screen 4 is perpendicular to the sliding direction of the vibrating screen 4, and ramps 24 are tiltedly arranged on both the front and rear sides of the top of the vibrating screen 4, and the outer ends of the ramps 24 are fixed on the inner wall of the water tank 3, and the gap between the vibrating screen 4 and the inner wall of the water tank 3 is blocked by the ramps 24 when the vibrating screen 4 slides;

[0071] A third motor 25 is fixed on the outer wall of the water tank 3, a turntable 26 is provided at the output end of the third motor 25, a lever 27 is eccentrically provided on the turntable 26, a long slot plate 28 is provided on the outer sliding sleeve of the lever 27, a right-angle slide plate 29 is provided at the bottom of the long slot plate 28, an outer end of the right-angle slide plate 29 vertically passes through the water tank 3 and is connected to the vibrating screen 4, and the right-angle slide plate 29 slides relative to the water tank 3.

[0072] It can be seen that the third motor 25 can move the long slot plate 28 forward and backward through the turntable 26 and the lever 27, and the long slot plate 28 can drive the vibrating screen 4 to move backward through the right-angle slide plate 29, thereby achieving the purpose of vibration of the vibrating screen 4.

[0073] More preferably, the lifting unit 7 includes a lifting cylinder 30 in a vertical state, the bottom of the lifting cylinder 30 is connected to the aggregate channel 6, a fourth motor 31 is provided at the top of the lifting cylinder 30, a second rotating shaft 32 is provided at the output end of the fourth motor 31, the second rotating shaft 32 is located in the lifting cylinder 30, a spiral plate 33 is provided on the outer wall of the second rotating shaft 32, and a drainage trough plate 34 is provided at the top of the outer wall of the lifting cylinder 30.

[0074] It can be seen that the fourth motor 31 can drive the second rotating shaft 32 and the spiral plate 33 to rotate. The spiral plate 33 can lift the material flowing into the lifting cylinder 30 from the collecting channel 6 upward to the position of the drainage groove plate 34. The material naturally flows out through the drainage groove plate 34, thereby realizing the lifting and discharging of the material.

[0075] More preferably, the flotation unit 5 includes a shunt pipe 35, the input end of the shunt pipe 35 is connected to the external bubble water forming chamber, and multiple output ends of the shunt pipe 35 are connected to the guide pipe 36, the guide pipe 36 extends into the water tank 3, and the guide pipe 36 is located at the bottom of the vibrating screen 4, and multiple through holes are opened on the outer wall of the guide pipe 36 in the water tank 3.

[0076] It can be seen that the high-pressure water in the external bubble water forming bin is introduced into the guide tube 36 through the shunt tube 35, and the bubble water in the guide tube 36 is naturally discharged through the through holes thereon, the pressure of the bubble water is rapidly released, and the air therein is rapidly precipitated, and the precipitated bubbles are mostly in the form of tiny bubbles. Therefore, this method can not only supply a large amount of bubbles to improve the flotation effect, but also supply water synchronously, so that the flotation impurities on the liquid surface can be naturally discharged through the discharge chute plate.

[0077] More preferably, the water circulation unit 8 includes a water pump 38 installed on the top of the water tank 3, the output end of the water pump 38 is inserted into the water in the water tank 3, and the input end of the water pump 38 is provided with a three-way pipe 39, the two input ends of the three-way pipe 39 are respectively connected to the two lifting cylinders 30, and the three-way pipe 39 and the lifting cylinder 30 are connected through filter holes.

[0078] It can be seen that the water pump 38 can extract the water in the lifting cylinder 30 through the three-way pipe 39 and reintroduce it into the water tank 3, so that the water in the water tank 3, the aggregate channel 6 and the lifting unit 7 forms a one-way circulation flow, which makes it convenient for the water flow to push the material flow in the aggregate channel 6. By connecting the three-way pipe 39 and the lifting cylinder 30 through the filter hole, the material in the lifting cylinder 30 can be prevented from entering the three-way pipe 39.

[0079] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An impurity separation device for harmless treatment of river sediment, characterized in that: include: A magnetic separation unit (1) for separating metal objects from mud and sand; A crushing unit (2) is provided to introduce the mud and sand after the metal objects are separated into the crushing unit (2), and the shredded paper, plastic objects, and sand and gravel in the mud and sand are crushed by the crushing unit (2); The water tank (3) is used to hold water, and the crushed sediment is introduced into the water in the water tank (3), thereby preparing for subsequent flotation work; A vibrating screen (4) is used to screen out objects in the mud and sand that cannot be crushed by rubber; An air flotation unit (5) is used to introduce air bubbles into the water in the water tank (3), so that the air bubbles can flotate broken paper scraps and plastic objects in the mud and sand in the water tank (3), thereby separating the impurities from the mud and sand; Aggregate channels (6), the number of the aggregate channels (6) being two, the bottom of the water tank (3) being inclined, the two aggregate channels (6) being connected and mounted on the water tank (3), one of the aggregate channels (6) being used to collect and gather the filtered sediment, and the other aggregate channel (6) being used to collect and gather the impurities intercepted by the vibrating screen (4); A lifting unit (7), wherein the number of the lifting units (7) is two, and the two lifting units (7) are respectively connected to the output ends of the two material collection channels (6), and the lifting units (7) are used to lift the materials gathered by the material collection channels (6) and transport them to an external collection device; A water circulation unit (8) is used to extract the water in the two lifting units (7) and reintroduce it into the water tank (3), so that the water forms a circulation flow in the water tank (3), the aggregate channel (6) and the lifting unit (7), so that the water flow can flush the material in the aggregate channel (6) into the lifting unit (7) to avoid material deposition; The magnetic separation unit (1) comprises a first fixed barrel (9), a material guide channel (10) and a material discharge channel (11) are arranged on the top of the outer wall of the first fixed barrel (9) at a relative inclination, and the material guide channel (10) and the material discharge channel (11) are communicated with each other, and the outer end of the material discharge channel (11) is away from the first fixed barrel (9), a first motor (12) is arranged on the side wall of the first fixed barrel (9), a first rotating shaft (13) is arranged at the output end of the first motor (12), and the first rotating shaft (13) is located in the first fixed barrel (9), and a plurality of magnetic plates (14) are arranged in an annular shape on the inner wall of the first fixed barrel (9), and a connecting rod (15) is connected between the first rotating shaft (13) and the magnetic plates (14); Wherein, the first fixed barrel (9), the material guiding channel (10) and the material discharging channel (11) are all made of insulating materials; The pulverizing unit (2) comprises a second fixed barrel (16) connected to the bottom of the material guide channel (10), two pulverizing rollers (17) are arranged opposite to each other in the second fixed barrel (16), and teeth are arranged on the outer walls of the pulverizing rollers (17); Rotating rings (18) are rotatably provided at both front and rear ends of the inner wall of the second fixed barrel (16); a plurality of scrapers (19) are provided between the two rotating rings (18); the scrapers (19) are in contact with the inner wall of the second fixed barrel (16); and the diameter of the crushing roller (17) that rotates in the opposite direction to the rotating ring (18) is larger than the diameter of the other crushing roller (17); Wherein, the second fixed barrel (16) is connected to the water tank (3), and the connection position is located at the top corner of the water tank (3).

2. The impurity separation equipment for harmless treatment of river sediment according to claim 1, characterized in that: The side wall of the water tank (3) is connected to a discharge trough plate, and the discharge trough plate is located above the liquid level in the water tank (3); The air flotation unit (5) supplies high-pressure bubble water into the water tank (3), thereby facilitating the rapid growth or bursting of bubbles after they enter the water tank (3), increasing the amount of water that dissolves the bubbles, and facilitating the continuous supply of water into the water tank (3).

3. The impurity separation equipment for harmless treatment of river sediment according to claim 2, characterized in that: A second motor (20) is provided on the outer end surface of the second fixed barrel (16), a worm (21) is provided at the output end of the second motor (20), three worm wheels (22) are meshedly provided on the worm (21), and the three worm wheels (22) are staggeredly distributed, wherein two worm wheels (22) located on both sides of the worm (21) are respectively connected to two crushing rollers (17), and a transmission wheel (23) is provided on the remaining worm wheel (22), the transmission wheel (23) is located in the second fixed barrel (16), and the transmission wheel (23) is connected to the inner wall of the circumference of a rotating ring (18).

4. The impurity separation equipment for harmless treatment of river sediment according to claim 3, characterized in that: The vibrating screen (4) is installed on the inner wall of the water tank (3) in an inclined and sliding manner, the inclination direction of the vibrating screen (4) is perpendicular to the sliding direction of the vibrating screen (4), and ramp plates (24) are arranged on both the front and rear sides of the top of the vibrating screen (4) in an inclined manner, and the outer ends of the ramp plates (24) are fixed on the inner wall of the water tank (3), so that the gap between the vibrating screen (4) and the inner wall of the water tank (3) is blocked by the ramp plates (24) when the vibrating screen (4) slides; A third motor (25) is fixed on the outer wall of the water tank (3), a rotating disk (26) is provided at the output end of the third motor (25), a lever (27) is eccentrically provided on the rotating disk (26), an outer sliding sleeve of the lever (27) is provided with a long slot plate (28), a right-angle slide plate (29) is provided at the bottom of the long slot plate (28), an outer end of the right-angle slide plate (29) vertically passes through the water tank (3) and is connected to the vibrating screen (4), and the right-angle slide plate (29) slides relative to the water tank (3).

5. The impurity separation equipment for harmless treatment of river sediment according to claim 4, characterized in that: The lifting unit (7) comprises a lifting cylinder (30) in a vertical state, the bottom of the lifting cylinder (30) being connected to the aggregate channel (6), the top of the lifting cylinder (30) being provided with a fourth motor (31), the output end of the fourth motor (31) being provided with a second rotating shaft (32), the second rotating shaft (32) being located in the lifting cylinder (30), the outer wall of the second rotating shaft (32) being provided with a spiral plate (33), and the top of the outer wall of the lifting cylinder (30) being connected to a drainage slot plate (34).

6. The impurity separation equipment for harmless treatment of river sediment according to claim 5, characterized in that: The air flotation unit (5) comprises a flow diversion pipe (35), the input end of the flow diversion pipe (35) is connected to an external bubble water forming chamber, and multiple output ends of the flow diversion pipe (35) are all connected to a flow guide pipe (36), the flow guide pipe (36) extends into the water tank (3), and the flow guide pipe (36) is located at the bottom of the vibrating screen (4), and multiple through holes are opened on the outer wall of the flow guide pipe (36) in the water tank (3).

7. The impurity separation equipment for harmless treatment of river sediment according to claim 6, characterized in that: The water circulation unit (8) comprises a water pump (38) installed on the top of the water tank (3), the output end of the water pump (38) is inserted into the water in the water tank (3), the input end of the water pump (38) is provided with a three-way pipe (39), the two input ends of the three-way pipe (39) are respectively connected to the two lifting cylinders (30), and the three-way pipe (39) and the lifting cylinder (30) are connected through the filter hole.

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