Circulating granulation fluidized bed

Abstract

The invention relates to the technical field of sewage treatment, in particular to a circulating granulation fluidized bed which comprises a shell with a top cover mounted at the top, a separation assembly and an inner cylinder are sequentially and fixedly mounted in the shell from top to bottom, and a liquid mixing box with an opening in the top wall is mounted in the top cover; the liquid mixing box is fixedly provided with a first water inlet pipe and a second water outlet pipe, the second water outlet pipe is connected with the middle of the liquid mixing pipe through a third pipeline, the first end of the liquid mixing pipe is communicated with the bottom of the flow mixing cylinder through the second water inlet pipe, and the top of the flow mixing cylinder is communicated with the inner cylinder; a plurality of second flow guide blades and a plurality of first flow guide blades are mounted in the flow mixing cylinder, a center hole is defined by the inner edges of the second flow guide blades, the inner edges of the first flow guide blades are fixedly connected with the outer wall of the center shaft, and the deflection directions of the first flow guide blades and the second flow guide blades are opposite; the second water inlet pipe is connected with the second liquid storage tank through a third water inlet pipe; the first water inlet pipe is connected with the first liquid storage tank through a second pipeline. The main body is of a tower-shaped structure, the occupied area is small, and the treatment speed is high.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a circulating granulation fluidized bed. Background Art

[0002] In the process of sewage treatment, solid-liquid separation is an indispensable link. Traditional solid-liquid separation mostly uses methods such as flotation or sedimentation, but when dealing with large-scale sewage treatment needs, traditional methods show significant limitations. The flotation system needs to be equipped with auxiliary devices such as dissolved air tanks and releasers, while the sedimentation process relies on large-area radial flow sedimentation tanks. Both have the pain points of large equipment footprint and complex structure. In addition, traditional solid-liquid separation requires flocculation and sedimentation processes, but the floccules are loose and have low structural density, resulting in long separation time and reduced sewage treatment efficiency. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a circulating granulation fluidized bed, which is specifically implemented by the following technical solutions: A circulating granulation fluidized bed comprises a shell with a top cover installed on the top, a first water outlet pipe is installed on the top cover, a separation assembly and an inner cylinder are fixedly installed in the shell from top to bottom in sequence, a first gap is left between the bottom of the separation assembly and the top of the inner cylinder, and a second gap is left between the bottom of the inner cylinder and the top of the scraper; a mixing liquid box is fixedly installed in the top cover, and an opening is provided on the top wall of the mixing liquid box; a first water inlet pipe and a second water outlet pipe are also fixedly installed on the top wall of the mixing liquid box, the second water outlet pipe is connected to the middle part of the mixing liquid pipe through a third pipeline, and the first end of the mixing liquid pipe is connected to the mixing liquid pipe through the second water inlet pipe The bottom of the flow tube is connected, and the top of the mixing tube is connected to the interior of the inner tube; a plurality of second guide vanes and a plurality of first guide vanes are installed in the mixing tube, the inner edges of the plurality of second guide vanes surround a central hole, the inner edges of the plurality of first guide vanes are fixedly connected to the outer wall of the central axis, and a third guide cone extending toward the central hole is provided at the bottom of the central axis; the deflection directions of the first guide vane and the second guide vane are opposite; the second end of the mixing tube is fixedly connected to one end of the sixth pipeline, the second water inlet pipe is connected to the second liquid storage tank through the third water inlet pipe, and the first water inlet pipe is connected to the first liquid storage tank through the second pipeline.

[0004] A first motor is installed on the top of the shell through a motor seat. The first motor is connected to the first end of the stirring shaft through a coupling. The second end of the stirring shaft extends into the inner cylinder. The part of the stirring shaft located in the inner cylinder is fixedly installed with several stirring components from top to bottom.

[0005] The stirring assembly comprises a sleeve which is detachably mounted on the stirring shaft, and a plurality of fan blades are fixedly mounted on the sleeve in a circular array.

[0006] A third flow guide is fixedly mounted on one end of the second water inlet pipe connected to the mixing cylinder via a plurality of second connecting rods. A first flow guide cone is disposed at the bottom of the third flow guide. The end of the first flow guide cone extends into the first end of the second water inlet pipe.

[0007] A second guide cone is provided on the top of the third guide member.

[0008] The diameter of the middle portion of the third flow guide is greater than the diameter of the central hole.

[0009] The sixth pipeline is fixedly connected to the first end of the fifth pipeline through the first tee, the second end of the fifth pipeline is fixedly connected to the fourth water outlet pipe, the fourth water outlet pipe is fixedly installed on the shell, and the fourth water outlet pipe is located between the bottom of the separation component and the top of the inner tube.

[0010] The height of the opening is smaller than the height of the bottom of the first water outlet pipe.

[0011] A conical mud discharge bucket is provided at the bottom of the shell, a scraper is installed in the mud discharge bucket, and the scraper is fixedly installed on the scraper shaft. The mud discharge bucket extends from the bottom of the scraper shaft and a sprocket is fixedly installed thereon. The sprocket is connected to the second motor drive through a chain.

[0012] The technical solution of the present invention has the following advantages: The main body of the invention is a tower-shaped structure, which occupies a small area and has a high processing speed.

[0013] In the present invention, the upward water flow ensures that the high-concentration particle layer is in a macroscopic suspended state, which is beneficial to the diffusion of initial particles to the large particle layer.

[0014] The stirring assembly in the inner cylinder is conducive to the uniform and regular growth of large particles.

[0015] The inorganic salt coagulant is fully diluted with the treated sewage 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 sewage.

[0016] The sewage is first mixed with an inorganic salt coagulant and then with an organic polymer coagulant. After the organic polymer coagulant is added, it immediately enters the mixing cylinder along with the sewage and is quickly mixed under the action of the first and second guide members, thereby improving the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the internal structure of the fluidized bed body; Figure 3 It is a structural schematic diagram of the inner tube; Figure 4 for Figure 3 The structural diagram at A in the middle; Figure 5 is a schematic diagram of the structure of the stirring assembly; Figure 6 is a structural schematic diagram of a first flow guide; Figure 7 The structure of the second flow guide is shown in FIG. Figure 1 ; Figure 8 The structure of the second flow guide is shown in FIG. Figure 2 ; Fig. 9 for Figure 2 Schematic diagram of the structure at B in the middle; Fig.10 for Figure 2 Schematic diagram of the structure at C in the middle.

[0019] In the figure, 1-shell, 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-mixing pipe, 22-second water inlet pipe, 23-third water inlet pipe, 24-sprocket, 25 -scraper shaft, 26-mud discharge pipe, 27-mud discharge pump, 28-guide cover, 29-stirring shaft, 30-mixing liquid box, 31-separation component, 32-inner cylinder, 33-first connecting rod, 34-scraper, 35-stirring component, 36-mixing cylinder, 37-first guide member, 38-second guide member, 39-third guide member, 40-second connecting rod, 41-sleeve, 43-connecting seat, 44-fan blade, 45-first guide blade, 46-center axis, 47-third guide cone, 48-second guide blade, 49-center hole, 50-guide plate. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the modules or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] 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 integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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.

[0023] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] As attached Figure 1 As shown, the present invention provides a circulating granulation fluidized bed, including a fluidized bed body, a first liquid storage tank 12 , a second liquid storage tank 16 and a mud discharge pump 27 .

[0025] As attached Figure 1 As shown, the fluidized bed body includes a shell 1, which is a hollow structure with a conical mud bucket at the bottom. A top cover 2 is installed on the top of the shell 1 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 seat. The first motor 6 is installed vertically, and the axis of the output shaft coincides with the axis of the shell 1.

[0026] The first motor 6 is used to drive the stirring module installed in the housing 1 .

[0027] A first water outlet pipe 5 is also installed on the top cover 2 and is located at one side of the motor base.

[0028] The first water outlet pipe 5 is fixedly connected to one end of the first pipeline 3, and the first pipeline 3 is used to discharge the treated wastewater.

[0029] 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 .

[0030] As attached Figure 2 and attached Fig. 9 As shown, a mixing liquid box 30 is fixedly installed in the top cover 2, and an opening is provided on the top wall of the mixing liquid box 30 so that the treated sewage can flow into the mixing liquid box 30 from the opening.

[0031] A first water inlet pipe 7 and a second water outlet pipe 8 are also fixedly installed on the top wall of the mixing liquid box 30. The first end of the first water inlet pipe 7 extends into the mixing liquid box 30, and the first end of the second water outlet pipe 8 also extends into the mixing liquid box 30. 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.

[0032] The second end of the first water inlet pipe 7 is connected to the first liquid storage tank 12 through the second pipeline 9. The second pipeline 9 is equipped with a first pump 11, which is used to pump the inorganic salt coagulant in the first liquid storage tank 12 into the mixing tank 30. In this embodiment, the first liquid storage tank 12 may store a polyaluminium chloride solution.

[0033] As attached Figure 2 As shown, the housing 1 is fixedly installed with a deflector 28, a separation assembly 31, an inner cylinder 32 and a scraper 34 in order from top to bottom. The scraper 34 is located in the mud discharge bucket and abuts against the inner wall of the mud discharge bucket.

[0034] The inner cylinder 32 is fixedly connected to the inner wall of the shell through a plurality of first connecting rods 33 .

[0035] A first gap is left between the bottom of the separation assembly 31 and the top of the inner cylinder 32 .

[0036] A second gap is left between the bottom of the inner cylinder 32 and the top of the scraper 34 .

[0037] The top of the 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 a fourth pipeline 17. The organic polymer coagulant is stored in the second liquid storage tank 16. The fourth pipeline 17 is equipped with a third pump.

[0038] 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 tube 32 and the liquid mixing pipe 21 .

[0039] The second end of the second water inlet pipe 22 is fixedly connected to the first end of the mixing pipe 21, and 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 pass the sewage to be treated.

[0040] The sixth pipeline 20 is fixedly connected to the first end of the fifth pipeline 18 through the first tee, and the second end of the fifth pipeline 18 is fixedly connected to the fourth water outlet pipe 14, which is fixedly installed on the shell 1 and is located between the bottom of the separation component 31 and the top of the inner tube 32.

[0041] A second pump 19 is installed on the fifth pipeline 18. The second pump 19 can return part of the sewage carrying the sludge particles.

[0042] In this embodiment, the mixing liquid 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 through the small diameter section, and 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; wherein 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.

[0043] The aforementioned second water outlet pipe 8 is fixedly connected to the small diameter section through a third pipeline 10; a mixer 15 and a fourth pump are installed on the third pipeline 10.

[0044] The treated sewage and inorganic salt coagulant enter the mixing tank 30, and are then pumped into the third pipeline 10 by the fourth pump, and then mixed in the mixer 15 to form a dilute solution of inorganic salt coagulant. Subsequently, the dilute solution of 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 liquid 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 mix with the sewage, thereby achieving flocculation and granulation of pollutants in the sewage.

[0045] The formed pollutant particles overflow from the top of the inner cylinder 32 to the space between the shell 1 and the inner cylinder 32 along with the sewage; the heavier pollutant particles fall directly into the mud bucket under the action of gravity. A small amount of light pollutant particles will continue to rise with the sewage, and then these particles will continue to collide in the separation component 31 and grow into heavier pollutant particles, and finally fall into the mud bucket.

[0046] In this embodiment, the air deflector 28 includes a bell-mouth section and a guide section fixedly connected together, wherein the large diameter end of the bell-mouth section is fixedly connected to the inner wall of the shell 1, and the small diameter end is fixedly connected to the first end of the guide section, and the height of the second end of the guide section is less than the height of the top of the shell 1.

[0047] The guide section is a vertical cylindrical structure, and the guide section is an equal-diameter structure.

[0048] After the sewage from the separation component 31 enters the deflector 28, there will be a short acceleration process. After the sewage comes out of the deflector 28, the water flow speed decreases and quickly diffuses to the surroundings. At this time, a small amount of pollutant particles carried in the sewage will fall into the space between the deflector 28 and the shell 1.

[0049] The third water outlet pipe 13 is fixedly mounted on the housing 1, and the third water outlet pipe 13 communicates with the space between the deflector 28 and the housing 1. In this embodiment, a switch valve can be installed on the third water outlet pipe 13 to open and discharge sewage regularly, and the third water outlet pipe 13 can also be connected to the sixth pipe 20 through a pipeline to realize reflux reprocessing.

[0050] As attached Figure 2 and attached Figure 3 As shown, the stirring module includes a stirring shaft 29 , a first end of which is connected to an output end of the first motor 6 via a coupling, and a second end of which extends into the inner cylinder 32 .

[0051] A portion of the stirring shaft 29 located in the inner tube 32 is fixedly mounted with a plurality of stirring components 35 from top to bottom for stirring the sewage in the inner tube 32 .

[0052] A premixing assembly is fixedly mounted at the bottom of the inner cylinder 32 to improve the mixing effect of the organic polymer coagulant and the sewage.

[0053] The structure of the premix component is shown in the attached Figure 4 , Attachment Figure 6 and attached Figure 7 As shown, the mixing cylinder 36 is included, and the first end of the second water inlet pipe 22 is communicated with the bottom of the mixing cylinder 36. The top of the mixing cylinder 36 is communicated with the interior of the inner cylinder 32.

[0054] As attached Figure 4 As shown, a third guide member 39 is fixedly mounted on the first end of the second water inlet pipe 22 via a plurality of second connecting rods 40 , a first guide cone is provided at the bottom of the third guide member 39 , and an end of the first guide cone extends into the first end of the second water inlet pipe 22 .

[0055] A second guide cone is provided on the top of the third guide member 39 .

[0056] A second flow guide 38 and a first flow guide 37 are fixedly installed in the mixing tube 36 from bottom to top in sequence. The axes of the second flow guide 38 and the first flow guide 37 coincide with each other, and a third gap is left between the second flow guide 38 and the first flow guide 37 .

[0057] A fourth gap is left between the second guide member 38 and the third guide member 39 .

[0058] The top height of the first flow guide 37 is smaller than the top height of the flow mixing tube 36 .

[0059] The structure of the second flow guide 38 is shown in the attached figure Figure 7 and attached Figure 8 As shown, it includes a plurality of second guide vanes 48, the outer edges of the second guide vanes 48 are fixedly connected to the inner wall of the mixing tube 36, and the inner edges of the plurality of second guide vanes 48 surround a central hole 49. A fifth gap is left between two adjacent second guide vanes 48, that is, there is no connection point between the two adjacent second guide vanes 48.

[0060] The axis of the third flow guide member 39 coincides with the axis of the second flow guide member 38 , and the middle diameter of the third flow guide member 39 is greater than the diameter of the center hole 49 .

[0061] The structure of the first flow guide 37 is shown in the attached figure Figure 6 As shown, it includes a plurality of first guide vanes 45, the outer edge of the first guide vane 45 is fixedly connected to the inner wall of the mixing tube 36, and the inner edge is fixedly connected to the outer wall of the central shaft 46. The central shaft 46 is a solid structure, and a third guide cone 47 is fixed at the bottom. The third guide cone 47 extends toward the central hole 49, and a sixth gap is left between the third guide cone 47 and the second guide vane 48.

[0062] In this embodiment, the first guide vane 45 and the second guide vane 48 have opposite deflection directions.

[0063] The sewage coming out of the second water inlet pipe 22 flows around the third guide member 39 under the guidance of the third guide member 39; then, part of the sewage forms a rotating upward water flow under the guidance of the second guide blade 48, and part of the sewage directly rises through the center hole 49.

[0064] The water flow passing through the central hole 49 hits the third guide cone 47 head-on, causing it to flow in all directions 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, the water flow will be quickly disrupted when encountering the first guide vane 45 and mixed again.

[0065] 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 .

[0066] In this embodiment, the mixing cylinder 36 is installed inside the inner cylinder 32 , and a plurality 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 will flow out from these water holes to avoid sludge deposition at the bottom of the inner cylinder 32 .

[0067] Of course, the mixing cylinder 36 can also be directly installed on the outside of 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.

[0068] The structure of the stirring assembly 35 is shown in the attached Figure 5 As shown, it includes a sleeve 41, which is sleeved on the stirring shaft 29 and fixed by bolts or jackscrews.

[0069] A plurality of connection seats 43 are fixedly mounted on the outer wall of the sleeve 41. The plurality of connection seats 43 are distributed in a circumferential array, and a fan blade 44 is fixedly mounted on each connection seat 43. The fan blade 44 has a deflection angle of 45 degrees with the horizontal plane.

[0070] The structure of the separation component 31 in this embodiment is as shown in the attached figure. Fig.10 As shown, it is composed of a plurality of guide plates 50 , and an S-shaped channel is formed between two adjacent guide plates 50 .

[0071] In this embodiment, the height of the opening of the mixing tank 30 is smaller than the height of the bottom of the first water outlet pipe 5 .

[0072] A water level sensor is also installed in the top cover 2.

[0073] As attached Figure 1 and attached Figure 2 As shown, the scraper 34 is fixedly mounted on the scraper shaft 25, a mud discharge bucket extends from the bottom of the scraper shaft 25, and a sprocket 24 is fixedly mounted thereon, and the sprocket 24 is connected to the second motor drive through a chain.

[0074] A mud discharge pipe 26 is fixedly mounted on the mud discharge bucket, and one end of the mud discharge pipe 26 away from the mud discharge bucket is fixedly connected to the input end of the mud discharge pump 27. The mud discharge pipe 26 is located at one side of the scraper shaft 25.

[0075] All motors, pumps, valves and sensors in this embodiment are electrically connected to the controller.

[0076] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the 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 mixing liquid box (30) being fixedly installed in the top cover (2), the top wall of the mixing liquid box (30) being provided with an opening; a first water inlet pipe (7) and a second water outlet pipe (8) being fixedly installed on the top wall of the mixing liquid box (30), the second water outlet pipe (8) being connected to the middle part of the mixing liquid pipe (21) through a third pipeline (10), and a first end of the mixing liquid pipe (21) being connected to the bottom of the mixing liquid cylinder (36) through the second water inlet pipe (22). The top of the mixing tube (36) is in communication with the interior of the inner tube (32); a plurality of second guide vanes (48) and a plurality of first guide vanes (45) are installed in the mixing tube (36); the inner edges of the plurality of second guide vanes (48) surround a central hole (49); the inner edges of the plurality of first guide vanes (45) are fixedly connected to the outer wall of the central axis (46); a third guide cone (47) extending toward the central hole (49) is provided at the bottom of the central axis (46); the first guide vane (45) and the second guide vane (48) have opposite deflection directions; the second end of the mixing tube (21) is fixedly connected to one end of the sixth pipeline (20); the second water inlet pipe (22) is connected to the second liquid storage tank (16) via the third water inlet pipe (23); and the first water inlet pipe (7) is connected to the first liquid storage tank (12) via the second pipeline (9).

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 sixth pipeline (20) is fixedly connected to the first end of the fifth pipeline (18) via 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 mounted on the shell (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).

8. 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).

9. 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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