A circulating granulating fluidized bed

Abstract

The present invention relates to the technical field of sewage treatment, and specifically relates to a circulating granulating fluidized bed, which includes a housing with a top cover installed at the top. Inside the housing, a separation component and an inner cylinder are fixedly installed in sequence from top to bottom. Inside the top cover, a liquid mixing tank with an open top wall is installed; the liquid mixing tank is fixedly installed with a first water inlet pipe and a second water outlet pipe. The second water outlet pipe is connected to the middle of a mixing pipe through a third pipeline. The first end of the mixing pipe is communicated with the bottom of a mixing cylinder through a second water inlet pipe, and the top of the mixing cylinder is communicated with the inner cylinder; several second guide vanes and several first guide vanes are installed inside the mixing cylinder. The inner edges of the several second guide vanes enclose a central hole, and the inner edges of the several first guide vanes are fixedly connected to the outer wall of a central shaft. The deflection directions of the first guide vanes and the second guide vanes are opposite; the second water inlet pipe is connected to a second liquid storage tank through a third water inlet pipe, and the first water inlet pipe is connected to a first liquid storage tank through a second pipeline. The main body of the present invention is a tower-shaped structure, which has a small floor area and a fast treatment speed.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and specifically relates to a circulating granulating fluidized bed. Background Art

[0002] In the process of sewage treatment, solid-liquid separation is an essential step. Traditional solid-liquid separation mostly adopts means such as air flotation or precipitation. However, when dealing with the large-scale sewage treatment demand, the traditional methods show significant limitations. The air flotation system needs to be equipped with accessory devices such as a dissolved air tank and a release device, while the precipitation process relies on a large-area radial flow sedimentation tank. Both have the pain points of large equipment floor area and complex structure. In addition, traditional solid-liquid separation requires a flocculation and precipitation process. However, the flocs are loose and have a low structural density, resulting in a long separation time and reducing the sewage treatment efficiency. Summary of the Invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a circulating granulating fluidized bed, which is specifically realized through the following technical solutions:

[0004] A circulating granulating fluidized bed includes a housing with a top cover installed on the top. A first water outlet pipe is installed on the top cover. Inside the housing, a separation component and an inner cylinder are fixedly installed in sequence from top to bottom. A first gap is left between the bottom of the separation component and the top of the inner cylinder, and a second gap is left between the bottom of the inner cylinder and the top of a scraper. A mixing liquid tank is fixedly installed inside the top cover, and an opening is provided on the top wall of the mixing liquid tank. A first water inlet pipe and a second water outlet pipe are also fixedly installed on the top wall of the mixing liquid tank. The second water outlet pipe is connected to the middle of a mixing liquid pipe through a third pipeline. The first end of the mixing liquid pipe is communicated with the bottom of a mixing flow cylinder through a second water inlet pipe. The top of the mixing flow cylinder is communicated with the inside of the inner cylinder. A number of second guide vanes and a number of first guide vanes are installed inside the mixing flow cylinder. The inner edges of the number of second guide vanes enclose a central hole. The inner edges of the number of first guide vanes are fixedly connected to the outer wall of a central shaft. A third guide cone extending towards the central hole is provided at the bottom of the central shaft. The deflection directions of the first guide vane and the second guide vane are opposite. The second end of the mixing liquid pipe is fixedly connected to one end of a sixth pipeline. The second water inlet pipe is connected to a second liquid storage tank through a third water inlet pipe. The first water inlet pipe is connected to a first liquid storage tank through a second pipeline.

[0005] A first motor is installed on the top of the housing through a motor seat. The first motor is connected to the first end of a stirring shaft through a coupling. The second end of the stirring shaft extends into the inner cylinder. A number of stirring components are fixedly installed on the part of the stirring shaft located in the inner cylinder from top to bottom.

[0006] The stirring component includes a sleeve detachably installed on the stirring shaft, and a number of fan blades are fixedly installed on the sleeve in a circumferential array.

[0007] One end of the second water inlet pipe communicating with the mixed flow cylinder is fixedly installed with a third flow guide member through a plurality of second connecting rods. A first flow guide cone is arranged at the bottom of the third flow guide member, and the end of the first flow guide cone extends into the first end of the second water inlet pipe.

[0008] A second flow guide cone is arranged at the top of the third flow guide member.

[0009] The diameter of the middle part of the third flow guide member is larger than the diameter of the central hole.

[0010] The sixth pipeline is fixedly connected to the first end of the fifth pipeline through a first three-way joint. The second end of the fifth pipeline is fixedly connected to a fourth water outlet pipe, and the fourth water outlet pipe is fixedly installed on the housing. The fourth water outlet pipe is located between the bottom of the separation assembly and the top of the inner cylinder.

[0011] The height of the opening is less than the height of the bottom of the first water outlet pipe.

[0012] A conical sludge discharge hopper is arranged at the bottom of the housing. A scraper is installed in the sludge discharge hopper. The scraper is fixedly installed on a scraper shaft. The bottom of the scraper shaft extends out of the sludge discharge hopper and is fixedly installed with a sprocket. The sprocket is drivenly connected to a second motor through a chain.

[0013] The technical solution of the present invention has the following advantages:

[0014] The main body of the present invention is a tower-like structure, which has a small floor area and a fast treatment speed.

[0015] In the present invention, the upward water flow ensures that the high-concentration particle layer is in a macroscopically suspended state, which is beneficial to the diffusion of initial particles to the large-particle layer.

[0016] The stirring assembly in the inner cylinder is beneficial to the uniform and regular growth of large particles.

[0017] The treated sewage is used to fully dilute the inorganic salt coagulant, and then mixed with the sewage to be treated, which not only saves water resources but also ensures the effective mixing of the inorganic salt coagulant and the sewage.

[0018] The sewage is first mixed with the inorganic salt coagulant and then mixed with the organic polymer coagulant. After the organic polymer coagulant is added, it immediately enters the mixed flow cylinder along with the sewage and is quickly mixed under the action of the first flow guide member and the second flow guide member, thereby improving the treatment efficiency. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the fluidized bed body;

[0022] Figure 3 It is a schematic structural diagram of the inner cylinder;

[0023] Figure 4 It is Figure 3 a schematic structural diagram of the position A in

[0024] Figure 5 It is a schematic structural diagram of the stirring assembly;

[0025] Figure 6 It is a schematic structural diagram of the first deflector;

[0026] Figure 7 It is a schematic structural diagram of the second deflector Figure 1 ;

[0027] Figure 8 It is a schematic structural diagram of the second deflector Figure 2 ;

[0028] Figure 9 It is Figure 2 a schematic structural diagram of the position B in

[0029] Figure 10 It is Figure 2 a schematic structural diagram of the position C in

[0030] In the figure, 1 - housing, 2 - top cover, 3 - first pipeline, 4 - electric valve, 5 - first water outlet pipe, 6 - first motor, 7 - first water inlet pipe, 8 - second water outlet pipe, 9 - second pipeline, 10 - third pipeline, 11 - first pump, 12 - first liquid storage tank, 13 - third water outlet pipe, 14 - fourth water outlet pipe, 15 - mixer, 16 - second liquid storage tank, 17 - fourth pipeline, 18 - fifth pipeline, 19 - second pump, 20 - sixth pipeline, 21 - liquid mixing pipe, 22 - second water inlet pipe, 23 - third water inlet pipe, 24 - sprocket, 25 - scraper shaft, 26 - sludge discharge pipe, 27 - sludge discharge pump, 28 - deflector, 29 - stirring shaft, 30 - liquid mixing tank, 31 - separation component, 32 - inner cylinder, 33 - first connecting rod, 34 - scraper, 35 - stirring component, 36 - mixing flow cylinder, 37 - first deflector, 38 - second deflector, 39 - third deflector, 40 - second connecting rod, 41 - sleeve, 43 - connecting seat, 44 - fan blade, 45 - first guide vane, 46 - central shaft, 47 - third guide cone, 48 - second guide vane, 49 - central hole, 50 - guide plate. Detailed implementation mode

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred modules or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] As shown in the Figure 1 accompanying drawings, the present invention provides a circulating granulating fluidized bed, which includes a fluidized bed body, a first liquid storage tank 12, a second liquid storage tank 16, and a sludge discharge pump 27.

[0036] As shown in the Figure 1 accompanying drawings, the fluidized bed body includes a housing 1, the housing 1 is of a hollow structure, and a conical sludge discharge hopper is provided at the bottom. The top of the housing 1 is installed with a top cover 2 through a flange, and a first motor 6 is installed at the middle position of the top of the top cover 2 through a motor base. The first motor 6 is vertically installed, and the axis of the output shaft coincides with the axis of the housing 1.

[0037] The first motor 6 is used to drive a stirring module installed in the housing 1.

[0038] A first water outlet pipe 5 is further installed on the top cover 2, and the first water outlet pipe 5 is located on one side of the motor base.

[0039] The first water outlet pipe 5 is fixedly connected to one end of a first pipeline 3, and the first pipeline 3 is used to discharge the treated wastewater.

[0040] An electric valve 4 is installed on the first water outlet pipe 5, and the electric valve 4 is used to control the water output of the first pipeline 3.

[0041] As shown in the Figure 2 and the Figure 9 accompanying drawings, a liquid mixing tank 30 is fixedly installed in the top cover 2, and an opening is provided on the top wall of the liquid mixing tank 30, so that the treated sewage can flow into the liquid mixing tank 30 from the opening.

[0042] A first water inlet pipe 7 and a second water outlet pipe 8 are further fixedly installed on the top wall of the liquid mixing tank 30. The first end of the first water inlet pipe 7 extends into the liquid mixing tank 30, and the first end of the second water outlet pipe 8 also extends into the liquid mixing tank 30, and the height of the first end of the first water inlet pipe 7 is located between the opening and the first end of the second water outlet pipe 8.

[0043] The second end of the first water inlet pipe 7 is connected to the first liquid storage tank 12 through a second pipeline 9. A first pump 11 is installed on the second pipeline 9, and the first pump 11 is used to pump the inorganic salt coagulant in the first liquid storage tank 12 into the liquid mixing tank 30. In this embodiment, the first liquid storage tank 12 can store a polyaluminum chloride solution.

[0044] As shown in the Figure 2 accompanying drawings, a flow guiding cover 28, a separation assembly 31, an inner cylinder 32, and a scraper 34 are fixedly installed in the housing 1 from top to bottom in sequence. The scraper 34 is located in the sludge discharge hopper and abuts against the inner wall of the sludge discharge hopper.

[0045] The inner cylinder 32 is fixedly connected to the inner wall of the housing through a plurality of first connecting rods 33.

[0046] A first gap is left between the bottom of the separation component 31 and the top of the inner cylinder 32.

[0047] A second gap is left between the bottom of the inner cylinder 32 and the top of the scraper 34.

[0048] The top of the aforementioned inner cylinder 32 is open, and the bottom is fixedly connected to the first end of the second water inlet pipe 22. The second water inlet pipe 22 is also fixedly connected to the first end of the third water inlet pipe 23 through a tee. The second end of the third water inlet pipe 23 is connected to the second liquid storage tank 16 through the fourth pipeline 17. An organic polymer coagulant is stored in the second liquid storage tank 16. A third pump is installed on the fourth pipeline 17.

[0049] In this embodiment, the connection point between the third water inlet pipe 23 and the second water inlet pipe 22 is located between the inner cylinder 32 and the mixing pipe 21.

[0050] The second end of the second water inlet pipe 22 is fixedly connected to the first end of the mixing pipe 21. The second end of the mixing pipe 21 is fixedly connected to one end of the sixth pipeline 20. The sixth pipeline 20 is used to introduce the sewage to be treated.

[0051] The sixth pipeline 20 is fixedly connected to the first end of the fifth pipeline 18 through a first tee. The second end of the fifth pipeline 18 is fixedly connected to the fourth water outlet pipe 14. The fourth water outlet pipe 14 is fixedly installed on the housing 1, and the fourth water outlet pipe 14 is located between the bottom of the separation component 31 and the top of the inner cylinder 32.

[0052] A second pump 19 is installed on the fifth pipeline 18. The second pump 19 can return part of the sewage carrying sludge particles.

[0053] In this embodiment, the mixing pipe 21 includes a first large-diameter section and a second large-diameter section respectively fixedly installed at both ends of the small-diameter section. The first large-diameter section and the second large-diameter section are connected by the small-diameter section. The diameter of the small-diameter section is smaller than the diameter of the first large-diameter section and also smaller than the diameter of the second large-diameter section. Among them, the first large-diameter section is fixedly connected to the second water inlet pipe 22, and the second large-diameter section is fixedly connected to one end of the sixth pipeline 20.

[0054] The aforementioned second water outlet pipe 8 is fixedly connected to the small-diameter section through the third pipeline 10. A mixer 15 and a fourth pump are installed on the third pipeline 10.

[0055] The treated sewage and the inorganic salt coagulant enter the mixing tank 30, and then are pumped into the third pipeline 10 together by the fourth pump, and then are mixed in the mixer 15 to form a dilute solution of the inorganic salt coagulant. Subsequently, the dilute solution of the inorganic salt coagulant is rapidly mixed with the sewage to be treated in the mixing pipe 21. Before the sewage mixed with the inorganic salt coagulant enters the inner cylinder 32, the third pump pumps the organic polymer coagulant in the second storage tank 16 into the second water inlet pipe 22, and then the sewage carrying the organic polymer coagulant enters the inner cylinder 32 to complete the mixing with the sewage, realizing the flocculation granulation of the pollutants in the sewage.

[0056] The formed pollutant particles overflow from the top of the inner cylinder 32 to the space between the housing 1 and the inner cylinder 32 together with the sewage; the heavier pollutant particles directly fall into the sludge hopper under the action of gravity. A small number of light pollutant particles will continue to rise with the sewage, and then these particles will collide continuously in the separation component 31 and grow into heavier pollutant particles, and finally fall into the sludge hopper.

[0057] In this embodiment, the flow guide cover 28 includes a flared section and a guiding section fixedly connected together, wherein the large-diameter end of the flared section is fixedly connected to the inner wall of the housing 1, the small-diameter end is fixedly connected to the first end of the guiding section, and the height of the second end of the guiding section is less than the height of the top of the housing 1.

[0058] The guiding section is a vertical cylindrical structure and is of equal diameter.

[0059] After the sewage coming out of the separation component 31 enters the flow guide cover 28, there will be a short acceleration process. After the sewage comes out of the flow guide cover 28, the water flow velocity decreases and rapidly diffuses around. At this time, a small amount of pollutant particles carried in the sewage will fall into the space between the flow guide cover 28 and the housing 1.

[0060] A third water outlet pipe 13 is fixedly installed on the housing 1, and the third water outlet pipe 13 communicates with the space between the flow guide cover 28 and the housing 1. A switching valve can be installed on the third water outlet pipe 13 in this embodiment to discharge sewage regularly, or it can be connected to the sixth pipeline 20 through a pipeline to realize reflux and reprocessing.

[0061] As shown in the attached Figure 2 and attached Figure 3 As shown, the aforementioned stirring module includes a stirring shaft 29, the first end of the stirring shaft 29 is connected to the output end of the first motor 6 through a coupling, and the second end extends into the inner cylinder 32.

[0062] A plurality of stirring components 35 are fixedly installed on the part of the stirring shaft 29 located in the inner cylinder 32 from top to bottom for stirring the sewage in the inner cylinder 32.

[0063] A premixing assembly is fixedly installed at the bottom of the inner cylinder 32 for improving the mixing effect of the organic polymer coagulant and the sewage.

[0064] The structure of the premixing assembly is as shown in Appendix Figure 4 , Appendix Figure 6 and Appendix Figure 7 as shown. It includes a mixing cylinder 36. The first end of the second water inlet pipe 22 communicates with the bottom of the mixing cylinder 36. The top of the mixing cylinder 36 communicates with the interior of the inner cylinder 32.

[0065] As shown in Appendix Figure 4 as shown, a third flow guiding member 39 is fixedly installed at the first end of the second water inlet pipe 22 through a plurality of second connecting rods 40. A first flow guiding cone is provided at the bottom of the third flow guiding member 39, and the end of the first flow guiding cone extends into the first end of the second water inlet pipe 22.

[0066] A second flow guiding cone is provided at the top of the third flow guiding member 39.

[0067] A second flow guiding member 38 and a first flow guiding member 37 are fixedly installed in the mixing cylinder 36 in sequence from bottom to top. The axes of the second flow guiding member 38 and the first flow guiding member 37 coincide, and a third gap is left between the second flow guiding member 38 and the first flow guiding member 37.

[0068] A fourth gap is left between the second flow guiding member 38 and the third flow guiding member 39.

[0069] The top height of the first flow guiding member 37 is less than the top height of the mixing cylinder 36.

[0070] The structure of the second flow guiding member 38 is as shown in Appendix Figure 7 and Appendix Figure 8 as shown, including a plurality of second flow guiding vanes 48. The outer edge of the second flow guiding vane 48 is fixedly connected to the inner wall of the mixing cylinder 36, and the inner edges of the plurality of second flow guiding vanes 48 enclose a central hole 49. A fifth gap is left between two adjacent second flow guiding vanes 48, that is, there is no connection point between two adjacent second flow guiding vanes 48.

[0071] The axis of the aforementioned third flow guiding member 39 coincides with the axis of the second flow guiding member 38, and the middle diameter of the third flow guiding member 39 is greater than the diameter of the central hole 49.

[0072] The structure of the first flow guiding member 37 is as shown in Appendix Figure 6 as shown, including a plurality of first flow guiding vanes 45. The outer edge of the first flow guiding vane 45 is fixedly connected to the inner wall of the mixing cylinder 36, and the inner edge is fixedly connected to the outer wall of the central shaft 46. The central shaft 46 is of a solid structure, and a third flow guiding cone 47 is fixed at the bottom. The third flow guiding cone 47 extends towards the central hole 49 and leaves a sixth gap with the second flow guiding vane 48.

[0073] In this embodiment, the deflection directions of the first guide vane 45 and the second guide vane 48 are opposite.

[0074] The sewage flowing out of the second water inlet pipe 22 flows around the third guide member 39 under the guidance of the third guide member 39; subsequently, part of the sewage forms a rotating and rising water flow under the guidance of the second guide vane 48, and part of the sewage rises directly through the central hole 49.

[0075] The water flow passing through the central hole 49 hits the third guide cone 47 head-on, causing it to flow around and mix with the rotating water flow formed by the second guide vane 48; then these water flows encounter the first guide vane 45 together. Since the deflection directions of the first guide vane 45 and the second guide vane 48 are opposite, when the water flow encounters the first guide vane 45, it will be quickly disrupted and mixed again.

[0076] Then, the water flow rotates under the guidance of the first guide vane 45 and rushes out of the mixing cylinder 36 and enters the inner cylinder 32.

[0077] In this embodiment, the mixing cylinder 36 is installed inside the inner cylinder 32. A number of water holes can be opened at the connection between the mixing cylinder 36 and the inner cylinder 32. At this time, part of the water flow will flow out from these water holes to prevent sludge deposition at the bottom of the inner cylinder 32.

[0078] Of course, the mixing cylinder 36 can also be directly installed outside the inner cylinder 32, that is, the top of the mixing cylinder 36 is fixedly connected to the bottom of the inner cylinder 32, and the mixing cylinder 36 is communicated with the inner cylinder 32; the bottom of the mixing cylinder 36 is fixedly connected to the first end of the second water inlet pipe 22.

[0079] The structure of the aforementioned stirring assembly 35 is as shown in the appendix Figure 5 and includes a sleeve 41 which is sleeved on the stirring shaft 29 and fixed by bolts or setscrews.

[0080] A number of connecting seats 43 are fixedly installed on the outer wall of the sleeve 41. These connecting seats 43 are arranged in a circumferential array, and a fan blade 44 is fixedly installed on each connecting seat 43. The fan blade 44 has a 45-degree deflection angle with the horizontal plane.

[0081] The structure of the separation assembly 31 in this embodiment is as shown in the appendix Figure 10 and is composed of a number of guide plates 50. An S-shaped channel is formed between adjacent two guide plates 50.

[0082] In this embodiment, the height of the opening of the mixing liquid tank 30 is less than the height of the bottom of the first water outlet pipe 5.

[0083] A water level sensor is also installed in the top cover 2.

[0084] As shown in the appendix Figure 1 and in the appendixFigure 2 As shown, the aforementioned scraper 34 is fixedly installed on the scraper shaft 25. The bottom of the scraper shaft 25 extends out of the sludge discharge hopper, and a sprocket 24 is fixedly installed thereon. The sprocket 24 is drivingly connected to the second motor through a chain.

[0085] A sludge discharge pipe 26 is fixedly installed on the sludge discharge hopper. One end of the sludge discharge pipe 26 far from the sludge discharge hopper is fixedly connected to the input end of the sludge discharge pump 27. The sludge discharge pipe 26 is located on one side of the scraper shaft 25.

[0086] All motors, pumps, valves, and sensors in this embodiment are electrically connected to the controller.

[0087] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A circulating granulation fluidized bed, characterized in that: The invention comprises a shell (1) with a top cover (2) installed on the top, a first water outlet pipe (5) installed on the top cover (2), a separation assembly (31) and an inner cylinder (32) fixedly installed in the shell (1) from top to bottom, a first gap being left between the bottom of the separation assembly (31) and the top of the inner cylinder (32), and a second gap being left between the bottom of the inner cylinder (32) and the top of the scraper (34); a liquid mixing box (30) being fixedly installed in the top cover (2), and a top wall of the liquid mixing box (30) being provided with opening; a first water inlet pipe (7) and a second water outlet pipe (8) are fixedly mounted on the top wall of the mixing liquid box (30); the second water outlet pipe (8) is connected to the middle of the mixing liquid pipe (21) through a third pipe (10); a first end of the mixing liquid pipe (21) is connected to the bottom of the mixing flow tube (36) through a second water inlet pipe (22); the top of the mixing flow tube (36) is connected to the interior of the inner tube (32); a plurality of second guide vanes (48) and a plurality of first guide vanes (45) are mounted in the mixing flow tube (36); ), the inner edges of a plurality of the second guide vanes (48) enclose a central hole (49), the inner edges of a plurality of the first guide vanes (45) are fixedly connected to the outer wall of the central shaft (46), and a third guide cone (47) extending toward the central hole (49) is provided at the bottom of the central shaft (46); the first guide vanes (45) and the second guide vanes (48) have opposite deflection directions; the second end of the mixing pipe (21) is fixedly connected to one end of the sixth pipeline (20), and the second water inlet pipe (22) is connected to the third inlet pipe (21). The water pipe (23) is connected to the second liquid storage tank (16); the first water inlet pipe (7) is connected to the first liquid storage tank (12) via the second pipe (9); the sixth pipe (20) is fixedly connected to the first end of the fifth pipe (18) via the first tee; the second end of the fifth pipe (18) is fixedly connected to the fourth water outlet pipe (14); the fourth water outlet pipe (14) is fixedly mounted on the housing (1); and the fourth water outlet pipe (14) is located between the bottom of the separation component (31) and the top of the inner cylinder (32).

2. The circulating granulation fluidized bed according to claim 1, characterized in that: A first motor (6) is mounted on the top of the housing (1) via a motor seat; the first motor (6) is connected to a first end of a stirring shaft (29) via a coupling; a second end of the stirring shaft (29) extends into the inner cylinder (32); a portion of the stirring shaft (29) located in the inner cylinder (32) is fixedly mounted with a plurality of stirring assemblies (35) from top to bottom.

3. The circulating granulation fluidized bed according to claim 2, characterized in that: The stirring assembly (35) comprises a sleeve (41) detachably mounted on the stirring shaft (29), and a plurality of fan blades (44) are fixedly mounted on the sleeve (41) in a circular array.

4. The circulating granulation fluidized bed according to claim 1, characterized in that: A third flow guide member (39) is fixedly mounted on one end of the second water inlet pipe (22) that is in communication with the mixing cylinder (36) via a plurality of second connecting rods (40); a first flow guide cone is provided at the bottom of the third flow guide member (39); an end of the first flow guide cone extends into the first end of the second water inlet pipe (22).

5. The circulating granulation fluidized bed according to claim 4, characterized in that: A second flow guide cone is provided on the top of the third flow guide member (39).

6. The circulating granulation fluidized bed according to claim 4, characterized in that: The diameter of the middle portion of the third flow guide (39) is greater than the diameter of the central hole (49).

7. The circulating granulation fluidized bed according to claim 1, characterized in that: The height of the opening is smaller than the height of the bottom of the first water outlet pipe (5).

8. The circulating granulation fluidized bed according to claim 1, characterized in that: A conical mud discharge bucket is provided at the bottom of the housing (1), a scraper (34) is installed in the mud discharge bucket, the scraper (34) is fixedly installed on the scraper shaft (25), the mud discharge bucket extends from the bottom of the scraper shaft (25), and a sprocket (24) is fixedly installed thereon, the sprocket (24) is connected to the second motor driving via a chain.

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