Multi-layer clarification thickener

Abstract

The present invention discloses a multi-layer clarifying concentrator, which includes a top frame guardrail, a driving mechanism is provided in the middle of the top frame guardrail, the driving mechanism is fixed on the driving shaft, a clarifying barrel is arranged on the driving shaft, a horizontal fixing frame is welded horizontally outwardly from the periphery of the clarifying barrel, and a plurality of cofferdams are vertically arranged on the horizontal fixing frame; the bottom of the product of the present invention includes long rake arms arranged on the left and right and short rake arms arranged on the front and back, the long rake arms and the short rake arms are both composed of horizontally arranged channel steels and a plurality of scrapers welded at the bottom of the channel steels, and each adjacent rake arm is connected by a horizontal cable. Through the above design, the present invention can effectively avoid the disturbance of the liquid in the upper part of the concentration tank through the filtration of multi-layer cofferdams and horizontal filtering weirs, and promote the sedimentation of fine particles; a three-dimensionally connected rake frame component is formed at the bottom, which can effectively sweep the sediment to the middle of the clarification tank, and is an ideal multi-layer clarifying concentrator.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection equipment, and in particular relates to a multi-layer clarification concentrator specially used for concentrating and cleaning sludge at the bottom of a clarification tank. Background Art

[0002] As we all know, a concentrator is a device that separates solid-liquid mixtures by gravity sedimentation. It is widely used in chemical, metallurgical, papermaking, pharmaceutical, sewage treatment and other fields.

[0003] Conventional thickeners are composed of thickening tanks, bridges, clarification barrels, transmission devices, main shafts and rakes, etc. Its working principle is: the slurry material to be concentrated is injected into the thickening tank through the clarification barrel, the transmission device installed on the bridge drives the rake to rotate through the central axis, and the concentrated material is scraped into the discharge hopper in the center of the tank by the scraper installed on the rake, and discharged from the bottom of the hopper, and the clarified liquid overflows from the overflow trough at the top of the thickening tank.

[0004] Since the slurry material contains a large number of fine particles, when the slurry is injected into the thickening tank or the rake rotates, it will cause disturbance of the liquid in the upper part of the thickening tank, so that these fine particles cannot settle and are discharged through the overflow tank with the clarified liquid. This causes the solid content of the clarified liquid to be high. If it is discharged directly, it will pollute the surrounding environment. If it is recycled, these particles will enter the slurry pump and accelerate the wear of the pump.

[0005] Furthermore, the existing rakes are divided into double rake structures and quadruple rake structures. The bottoms of all types of existing rakes are tripod structures. The rakes of this structure have strong rigidity, but are complex in structure, high in manufacturing cost, and troublesome in manufacturing.

[0006] In view of the drawbacks of the prior art, the purpose of the present invention is to make technical improvements on the basis of the existing clarifying concentrator, and to redesign the rake frame on the basis of ensuring the overall strength of the rake frame, so that it is simple to manufacture, firm to use, and conducive to improving the process performance of the concentrator and reducing the emission of pollutants. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention discloses a multi-layer clarifying concentrator, the specific structure of which is described as follows:

[0008] A multi-layer clarification concentrator, which includes a top frame guardrail, a driving mechanism is arranged in the middle of the top frame guardrail, the driving mechanism is installed above the middle of the clarification tank and fixed on the driving shaft, a clarification barrel is arranged downward from the driving mechanism, the top of the clarification barrel is blocked, and a circle of horizontal fixing frames are welded horizontally outward from the periphery, the top of the horizontal fixing frame is welded to the top frame guardrail by surrounding hanging columns, a cofferdam is vertically arranged at intervals of one hanging column on the horizontal fixing frame, and a top filtering weir is obliquely arranged below each cofferdam; the driving shaft is upward from the bottom end by 1-1.5 meters In the enclosure, a top fixing plate is welded in the front, back, left, and right directions of the driving shaft respectively. The bottom of the invention product includes long rake arms arranged on the left and right and short rake arms arranged on the front and back. The bottom of the driving shaft is welded with four right-angled sides, and a gap is left between each two adjacent right-angled sides. Below the four right-angled sides, the driving shaft extends downward and is welded with a bottom scraper. The long rake arms are symmetrically arranged on the left and right, and the long rake arms are composed of horizontally arranged channel steels and multiple scrapers welded at the bottom of the channel steels, and their openings are arranged upwards. Taking the right channel steel as an example, a fixed shaft is welded through the opening at one end close to the driving shaft, and the right side of the fixed shaft is welded with a fixed shaft. On the side, a connecting piece is welded to the top of the channel steel connecting the front and rear side walls of the channel steel. On the right side of the channel steel, a connecting piece is welded to the top of the channel steel at a distance of fifty centimeters from the right end face of the channel steel. A bottom fixing piece is welded on the front and rear sides of the bottom of the channel steel respectively. A fixed shaft is welded through the front and rear side walls at a distance of one hundred and twenty centimeters from the right end face of the channel steel. The connection structure of the left channel steel is the same as that of the right channel steel, and the two are symmetrically arranged. The short rake arm is also composed of a horizontally arranged channel steel and a plurality of scrapers welded to the bottom of the channel steel, which are symmetrically arranged front and back. On the short rake arm, the end close to the drive shaft has the same connection structure as the long rake arm, and a fixed shaft and a The top connecting piece has a top connecting piece at the end away from the driving shaft and a bottom fixing piece welded to the left and right sides of the bottom respectively, and a fixed shaft is penetrated on the left and right sides of the front side of the top connecting piece; on the long rake arms arranged on the left and right and the short rake arms arranged front and back, each adjacent two rake arms are connected by a horizontal cable, and the top of each long rake arm and the short rake arm is connected to the fixing shaft away from the driving shaft and the top fixing piece welded on the driving shaft by an inclined cable; the ends of the long rake arm and the short rake arm close to the driving shaft are fixed in the gaps reserved between the corresponding right-angle sides by fixed shafts respectively.

[0009] The horizontal cables and the inclined cables are both length-adjustable cables.

[0010] The scrapers welded at the bottom of the long rake arm and the short rake arm are made of angle irons, with their straight sides arranged vertically downwards. The welding angle A between the scrapers and the channel steel is 40 to 50 degrees.

[0011] The cofferdam is made of filter plates rolled into a barrel shape, which is fixedly connected to the clarification barrel and the top frame guardrail through a horizontal fixing frame. The cofferdam has several layers, and the number of layers is determined by the diameter of the actual clarification tank; further, the top of the outermost cofferdam is in contact with the bottom surface of the top frame guardrail, and it is fifteen centimeters higher than the overflow trough at the edge of the clarification tank.

[0012] The top filter weir and the cofferdam are made of the same material, and are set at an inclined taper, with one side facing the drive shaft being ten centimeters higher than the other side.

[0013] The present invention has the following beneficial effects: through the above design, the present invention arranges a clarification barrel, a multi-layer cofferdam and a horizontal filter weir on the top and inside of the clarification tank. Through the filtration of the multi-layer cofferdam and the horizontal filter weir, the disturbance of the liquid in the upper part of the concentration tank can be effectively avoided, the sedimentation of fine particles is promoted, the concentration quality is improved, and the emission of pollutants can be reduced. Furthermore, the long rake arm and the short rake arm of the present invention are both welded in a combination of channel steel and scraper blades, and the adjacent long rake arms and short rake arms are connected and fixed respectively by four horizontal cables, and the long rake arms and the short rake arms are connected and fixed to the drive shaft by inclined cables to form a three-dimensionally connected rake frame member, and the welding angle of the scraper and the channel steel is controlled within the range of 40 to 50 degrees. When the present invention rotates clockwise, the sediment can be effectively swept to the middle of the clarification tank. In summary, the product of the present invention has low manufacturing cost and high cleaning efficiency, and is an ideal multi-layer clarification concentrator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention after assembly;

[0016] Figure 2 It is a schematic diagram of the top view of the connection structure of the long rake arm and the short rake arm of the present invention;

[0017] Figure 3 It is a schematic diagram of the main structure of the long rake arm of the present invention;

[0018] Figure 4 It is a schematic diagram of the top view of the long rake arm of the present invention;

[0019] Figure 5 It is a schematic diagram of the main structure of the short rake arm of the present invention;

[0020] Figure 6 It is a schematic diagram of the top view of the short rake arm structure of the present invention;

[0021] In the figure, 1. top frame guardrail, 2. driving mechanism, 3. driving shaft, 4. top fixing plate, 5. inclined cable, 6. right-angle side, 7. fixed shaft, 8. long rake arm, 9. short rake arm, 10. scraper, 11. bottom scraper, 12. clarification tank, 13. bottom fixing plate, 14. connecting plate, 15. horizontal cable, 16. channel steel, 17. clarification barrel, 18. horizontal fixing frame, 19. hanging column, 20. cofferdam, 21. top filter weir, 22. overflow tank. DETAILED DESCRIPTION

[0022] The present invention is further described below through an embodiment. A multi-layer clarification concentrator includes a top frame guardrail 1. A driving mechanism 2 is provided in the middle of the top frame guardrail 1. The driving mechanism 2 is installed above the middle of the clarification tank 12; it is fixed on a driving shaft 3, and a clarification barrel 17 is provided downward from the driving mechanism 2. The top of the clarification barrel 17 is blocked, and a circle of horizontal fixing frames 18 are welded horizontally outward from the periphery. The top of the horizontal fixing frame 18 is welded to the top frame guardrail 1 by a surrounding hanging column 19. On the horizontal fixing frame 18, a cofferdam 20 is vertically arranged at intervals of a hanging column 19, and a top filter weir 21 is obliquely arranged below each cofferdam 20; when the present invention is working, the upper plane of the cofferdam 20 is 150 mm higher than the upper end surface of the overflow tank 22, and the number of layers of the cofferdam 20 to be installed is determined according to the diameter of the clarifier and the slurry concentration. When the slurry is injected into the clarifier tank 12 through the clarification barrel 17, most of the fine particles are diffused in the cofferdam and the top filter weir, and the multi-layer filtration causes them to gradually settle, thereby avoiding the fine particles from directly flowing into the overflow tank, so that the solid content of the clarified liquid reaches the discharge standard.

[0023] Furthermore, on the driving shaft 3, fixed on the driving shaft 3 within a range of 1-1.5 meters from the bottom upward, a top fixing plate 4 is welded in the front, back, left and right directions of the driving shaft 3 respectively. The inventive product includes long rake arms 8 arranged on the left and right and short rake arms 9 arranged on the front and back; the bottom of the driving shaft 3 is welded with four right-angled sides 6, and a gap is left between each two adjacent right-angled sides 6. Below the four right-angled sides 6, the driving shaft 3 extends downward and is welded with a bottom scraper 11; the long rake arms 8 are arranged symmetrically on the left and right, and the long rake arms 8 are composed of a horizontally arranged channel steel 16 and a plurality of scrapers 10 welded at the bottom of the channel steel 16, and the opening of the channel steel 16 is arranged upward. Taking the right side channel steel as an example, a fixed shaft 7 is welded to the inside of the opening at one end close to the driving shaft 3, and a connecting piece 14 is welded to the front and rear side walls of the channel steel 16 at the top of the channel steel 16. On the right side of the channel steel 16, fifty centimeters away from the right end face of the channel steel, a connecting piece 14 is welded on the top of the channel steel, and a bottom fixing piece 13 is welded on the front and rear sides of the bottom of the channel steel 16 respectively. A fixed shaft 7 is welded through the front and rear side walls at a distance of one hundred and twenty centimeters from the right end face of the channel steel; the connection structure of the left channel steel is the same as that of the right channel steel, and the two are symmetrically arranged; the short rake arm 9 is also composed of a horizontally arranged channel steel 16 and a plurality of scrapers 10 welded at the bottom of the channel steel, which are symmetrically arranged front and back. On the short rake arm 9, the end close to the drive shaft 3 is the same as the connection structure of the long rake arm 8, and a fixed shaft 7 and a top connecting piece 14 are also arranged on the channel steel 16. A top connecting piece 14 is arranged at the end away from the drive shaft 3, and a bottom fixing piece 13 is welded on the left and right sides of the bottom, respectively. On the front side of the top connecting piece 14, a fixed shaft 7 is arranged through the left and right sides;

[0024] Furthermore, on the long rake arms 8 arranged on the left and right and the short rake arms 9 arranged on the front and back, each adjacent two rake arms are connected by a horizontal cable 15, and the top of each long rake arm 8 and short rake arm 9 is connected to the fixed shaft 7 away from the driving shaft 3 and the top fixed plate 4 welded on the driving shaft through an inclined cable 5; the ends of the long rake arms 8 and the short rake arms 9 close to the driving shaft 3 are fixed in the gaps reserved between the corresponding right-angle sides 6 by the fixed shafts 7.

[0025] In order to further adjust the present invention so as to optimize the structural strength of the product of the present invention, the horizontal cable 15 and the inclined cable 5 are both length-adjustable cables.

[0026] like Figure 1 , Figure 2As shown, when the present invention is working, under the action of the driving mechanism 2 installed on the top frame guardrail 1, the driving shaft 3 drives the long rake arm 8 and the short rake arm 9 to rotate clockwise, and four horizontal cables 15 are used to respectively connect and fix the adjacent long rake arms 8 and short rake arms 9, and the inclined cables 5 are used to respectively connect and fix the long rake arms 8 and the short rake arms 9 with the driving shaft 3 to form a three-dimensionally connected rake frame component. The long rake arm 8 and the short rake arm 9 sweep the sediment to the middle of the clarification tank through the bottom scraper. In order to better achieve the cleaning effect, the scraper 10 welded at the bottom of the long rake arm 8 and the short rake arm 9 is an angle The scraper is made of iron, and its straight side is arranged vertically downward. The welding angle A between the scraper and the channel steel is preferably 45 degrees. During this process, a large number of fine particles in the slurry material will cause liquid disturbance in the upper part of the concentrating tank when the slurry is injected into the concentrating tank or the rake rotates. These fine particles are filtered through the side cofferdams and the top filter weir by multiple layers, so that the fine particles cannot reach the overflow tank, which effectively reduces the solid content of the clarified liquid, avoids these particles from entering the slurry pump, and effectively reduces the wear of the mortar pump. In summary, the present invention has low production cost and high cleaning efficiency, and is an ideal multi-layer clarifying concentrator.

Claims

1. A multi-layer clarifying concentrator, comprising a top frame guardrail, wherein a driving mechanism is provided in the middle of the top frame guardrail, characterized in that: The driving mechanism is installed above the middle of the clarification tank and fixed on the driving shaft. A clarification barrel is arranged downward from the driving mechanism. The top of the clarification barrel is blocked, and a circle of horizontal fixing frames are welded horizontally outward from the periphery. The top of the horizontal fixing frame is welded to the top frame guardrail through the surrounding hanging columns. On the horizontal fixing frame, a cofferdam is vertically arranged at intervals of a hanging column, and a top filtering weir is obliquely arranged below each cofferdam; within the range of 1-1.5 meters from the bottom end of the driving shaft, a top fixing is respectively welded in the front, back, left, and right directions of the driving shaft. The bottom of the multi-layer clarification concentrator includes long rake arms arranged on the left and right and short rake arms arranged in front and back; the bottom of the driving shaft is welded with four right-angled sides, and a gap is left between each two adjacent right-angled sides. Below the four right-angled sides, the driving shaft extends downward and is welded with a bottom scraper; the long rake arms are symmetrically arranged on the left and right, and the long rake arms are composed of horizontally arranged channel steels and multiple scrapers welded at the bottom of the channel steels, and the openings thereof are arranged upwards. For the right side channel steel, a fixed shaft is welded through the opening of one end close to the driving shaft, and the top of the channel steel is connected to the front and rear side walls of the channel steel by welding. There is a connecting piece. On the right side of the channel steel, 50 cm away from the right end face of the channel steel, a connecting piece is welded on the top of the channel steel. A bottom fixing piece is welded on the front and rear sides of the bottom of the channel steel respectively. A fixed shaft is welded through the front and rear side walls at a distance of 120 cm from the right end face of the channel steel. The connection structure of the left channel steel is the same as that of the right channel steel, and the two are symmetrically arranged. The short rake arm is also composed of a horizontally arranged channel steel and a plurality of scrapers welded at the bottom of the channel steel, which are symmetrically arranged front and back. On the short rake arm, the end close to the drive shaft has the same connection structure as the long rake arm, and a fixed shaft and a top connecting piece are also arranged on the channel steel. A top connecting piece is arranged at the end away from the driving shaft, and a bottom fixing piece is welded to the left and right sides of the bottom, respectively. A fixing shaft is arranged on the front side of the top connecting piece. Each adjacent two rake arms are connected by a horizontal cable on the long rake arms arranged on the left and right and the short rake arms arranged front and back. The top of each long rake arm and the short rake arm is connected to the fixing shaft away from the driving shaft and the top fixing piece welded on the driving shaft by an inclined cable. The ends of the long rake arm and the short rake arm close to the driving shaft are fixed in the gaps reserved between the corresponding right-angle sides by fixing shafts. The cofferdam is made of filter plates rolled into a barrel shape, which is fixedly connected to the clarification tank and the top frame guardrail through a horizontal fixing frame. The cofferdam has several layers, and the number of layers is determined by the diameter of the actual clarification tank; further, the top of the outermost cofferdam is in contact with the bottom surface of the top frame guardrail, and it is 15 cm higher than the overflow trough at the edge of the clarification tank; The top filter weir and the cofferdam are made of the same material, and are set at an inclined taper, with one side facing the drive shaft being ten centimeters higher than the other side.

2. The multi-layer clarifying concentrator according to claim 1, characterized in that: The horizontal cables and the inclined cables are both length-adjustable cables.

3. The multi-layer clarifying concentrator according to claim 1, characterized in that: The scrapers welded at the bottom of the long rake arm and the short rake arm are made of angle irons, with their straight sides arranged vertically downwards. The welding angle A between the scrapers and the channel steel is 40 to 50 degrees.

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