Solid-liquid separation circulating granulation fluidized bed

Abstract

The embodiment of the invention provides a solid-liquid separation circulating granulation fluidized bed. Wherein the outer-layer cylinder, the middle-layer cylinder and the inner-layer cylinder in the solid-liquid separation circulating granulation fluidized bed are sequentially arranged from outside to inside, the middle-layer cylinder is provided with a downward opening, the middle-layer cylinder is reversely buckled in the outer-layer cylinder, an inner flow channel is formed in the inner-layer cylinder, and the outer-layer cylinder and the inner-layer cylinder are communicated through the inner flow channel. A middle flow channel is formed between the middle-layer barrel and the inner-layer barrel, an outer flow channel is formed between the outer-layer barrel and the middle-layer barrel, the inner flow channel, the middle flow channel and the outer flow channel are alternately arranged in the flowing direction of liquid, and the flocculation reaction cavity is formed in the inner flow channel; the stirrer penetrates through the middle-layer barrel body and the inner-layer barrel body, and paddles of the stirrer are positioned in the inner-layer barrel body. Therefore, the solid-liquid separation circulating granulation fluidized bed disclosed by the embodiment of the invention has the advantage of reducing the equipment size and the turbidity of the discharged water.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection equipment, and in particular to a solid-liquid separation circulating granulation fluidized bed. Background Art

[0002] In the related art, the crystallization fluidized bed device includes an outer cylinder and a stirring device, and chemical agents are added to the outer cylinder, so that the crystals continue to gather on the surface of the seed crystals. When the crystals grow to a certain size, they will break the fluidization balance, automatically deposit to the bottom of the bed, and finally enter the plate and frame filter press system for mud and water separation process, and finally form a mud cake. However, the size of this large-diameter outer cylinder is limited. Therefore, under the premise of ensuring the sedimentation effect of tiny particles (ensuring the turbidity upper limit of overflow water), the overall flow rate in the crystallization fluidized bed is also limited. Exceeding this flow upper limit will cause a large number of tiny particles to no longer be effectively precipitated in the large-diameter sedimentation device and be discharged with the overflow water, resulting in an increase in the turbidity of the external drainage. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a solid-liquid separation circulating granulation fluidized bed. The solid-liquid separation circulating granulation fluidized bed has the advantages of reducing the equipment size and the turbidity of the external drainage.

[0004] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention comprises an outer cylinder, a middle cylinder, an inner cylinder and a stirrer.

[0005] The outer cylinder, the middle cylinder and the inner cylinder are arranged in sequence from the outside to the inside, the middle cylinder has a downward opening, and the middle cylinder is inverted in the outer cylinder, at least a part of the inner cylinder extends from the opening of the middle cylinder into the middle cylinder, the inner cylinder is provided with a medicine addition port, a liquid inlet at the lower end and a flow guide port at the upper section; an inner flow channel is formed in the inner cylinder, and the liquid inlet, the medicine addition port and the flow guide port are all It is connected to the inner flow channel, a middle flow channel is formed between the middle cylinder and the inner cylinder, an outer flow channel is formed between the outer cylinder and the middle cylinder, the inner flow channel, the middle flow channel and the outer flow channel are alternately arranged in the flow direction of the liquid, wherein the flocculation reaction chamber is formed in the inner flow channel; the agitator passes through the middle cylinder and the inner cylinder, and the blades of the agitator are located in the inner cylinder to drive the fluid to flow in the direction from the liquid inlet to the guide port.

[0006] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention arranges the outer cylinder, the middle cylinder and the inner cylinder in sequence from the outside to the inside, and forms an inner flow channel in the inner cylinder, a middle flow channel between the middle cylinder and the inner cylinder, and an outer flow channel between the outer cylinder and the middle cylinder. The inner flow channel, the middle flow channel and the outer flow channel are alternately arranged in the flow direction of the liquid (specifically, the fluid in the inner flow channel flows from bottom to top, the fluid in the middle flow channel flows from top to bottom, and the fluid in the outer flow channel flows from bottom to top). Without increasing the size of the cylinder, the overall length of the fluid flow channel is increased, thereby extending the aggregation time of the seed particles, making the water flow path more tortuous and complex, forcing all water bodies to pass through a sufficient flocculation reaction zone (flocculation reaction chamber), ensuring uniform mixing between the reagent and the sludge particles, and increasing the flow path length increases the chance of collision between particles, so that fine particles have more time to aggregate into larger particles, thereby reducing the turbidity of external drainage. The test results show that the turbidity of water obtained through the solid-liquid separation circulating granulation fluidized bed can be reduced to below 5NTU.

[0007] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention has the advantages of reducing the equipment size and the turbidity of the external drainage.

[0008] In some embodiments, a mud collecting area is provided at the lower section of the outer cylinder, and a preset distance is provided between the liquid inlet of the inner cylinder and the mud collecting area.

[0009] In some embodiments, the distance between the water inlet of the inner cylinder and the bottom of the outer cylinder is 800mm-1200mm.

[0010] In some embodiments, the liquid inlet and the flow guide port are arranged opposite to each other in the height direction of the outer cylinder, and the drug addition port is arranged between the liquid inlet and the flow guide port.

[0011] In some embodiments, the inner cylinder includes a sewage inlet section and a granulation section which are connected in sequence, and the sewage inlet section is located above the granulation section. The cross-section of the granulation section is larger than the cross-sectional area of ​​the sewage inlet section to form a stirring static zone at the lower end of the inner cylinder, the sewage inlet port is located on the sewage inlet section, and the diversion port is located at the upper end of the granulation section.

[0012] In some embodiments, the granulation section includes a first section and a second section, the first section is provided with a first flared section at the connection with the pollution inlet section, and the second section is provided with a second flared section at the connection with the first section.

[0013] In some embodiments, the diameter of the sewage inlet section is 350 mm-500 mm.

[0014] In some embodiments, the inclination angle of each of the first flared section and the second section is 40°-50°.

[0015] In some embodiments, the diameter of the first segment is 400 mm-800 mm.

[0016] In some embodiments, the diameter of the second segment is 2000 mm-3300 mm.

[0017] In some embodiments, the diameter of the outer cylinder is 3000mm-4000mm.

[0018] In some embodiments, the diameter of the middle cylinder is 2400mm-3700mm.

[0019] In some embodiments, the ratio of the cross-section of the outer flow channel, the cross-section of the middle flow channel and the maximum cross-section of the inner flow channel is 1:0.75-0.85:0.5-0.6.

[0020] In some embodiments, the distance between the lower end of the middle cylinder and the water inlet of the inner cylinder in the height direction of the outer cylinder is 500mm-900mm.

[0021] In some embodiments, the rotation speed of the blade of the stirrer is 100-400 rpm.

[0022] In some embodiments, the solid-liquid separation circulating granulation fluidized bed further comprises a water collecting tank, and the water collecting tank is arranged at the upper section of the outer cylinder.

[0023] In some embodiments, the solid-liquid separation circulating granulation fluidized bed further comprises a separation device, the outer edge of the separation device is connected to the inner wall surface of the outer cylinder, and the inner edge of the separation device is connected to the outer wall surface of the middle cylinder.

[0024] In some embodiments, the separation device includes an annular plate, the outer edge of the annular plate is connected to the inner wall surface of the outer cylinder, the inner edge of the annular plate is connected to the outer wall surface of the middle cylinder, and the annular plate is provided with a plurality of inclined holes.

[0025] In some embodiments, the separation device includes a plurality of connected and obliquely arranged tubes, each of which has an inclined hole.

[0026] In some embodiments, the height difference between the lower end surface of the middle cylinder and the lower end of the inclined hole is 4000mm-5000mm.

[0027] In some embodiments, the depth of the inclined hole is 200 mm-300 mm.

[0028] In some embodiments, the inclined hole has an inclination angle of 40°-50°. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of a solid-liquid separation circulating granulation fluidized bed according to an embodiment of the present invention.

[0030] Figure 2 It is a schematic structural diagram of the inner cylinder of an embodiment of the present invention.

[0031] Reference numerals:

[0032] Outer cylinder 1; mud collecting area 11; water collecting tank 12;

[0033] Middle cylinder 2;

[0034] Inner cylinder 3; sewage inlet section 31; first expansion section 32; first subsection 33; second expansion section 34; second subsection 35;

[0035] Liquid inlet 301; flow guide port 302;

[0036] Agitator 4;

[0037] Separating device 5; inclined hole 51. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] Reference below Figure 1-Figure 2 The solid-liquid separation circulating granulation fluidized bed according to an embodiment of the present invention is described.

[0040] The solid-liquid separation circulating granulation fluidized bed according to the embodiment of the present invention comprises an outer cylinder 1 , a middle cylinder 2 , an inner cylinder 3 and a stirrer 4 .

[0041] The outer cylinder 1, the middle cylinder 2 and the inner cylinder 3 are arranged in sequence from the outside to the inside. The middle cylinder 2 has a downward opening, and the middle cylinder 2 is inverted in the outer cylinder 1. At least a part of the inner cylinder 3 extends from the opening of the middle cylinder 2 into the middle cylinder 2. The inner cylinder 3 is provided with a medicine adding port, a liquid inlet 301 at the lower end and a flow guide port 302 at the upper section; an inner flow channel is formed in the inner cylinder 3, and the liquid inlet 301, the medicine adding port and the flow guide port 302 are provided in the inner cylinder 3. The flow ports 302 are all connected to the inner flow channel, a middle flow channel is formed between the middle cylinder 2 and the inner cylinder 3, an outer flow channel is formed between the outer cylinder 1 and the middle cylinder 2, the inner flow channel, the middle flow channel and the outer flow channel are alternately arranged in the flow direction of the liquid, and a flocculation reaction chamber is formed in the inner flow channel; the agitator 4 passes through the middle cylinder 2 and the inner cylinder 3, and the blades of the agitator 4 are located in the inner cylinder 3 to drive the fluid to flow in the direction from the liquid inlet 301 to the guide port 302.

[0042] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention is provided with an outer cylinder 1, a middle cylinder 2 and an inner cylinder 3 in sequence from the outside to the inside, and an inner flow channel is formed in the inner cylinder 3, a middle flow channel is formed between the middle cylinder 2 and the inner cylinder 3, and an outer flow channel is formed between the outer cylinder 1 and the middle cylinder 2, and the inner flow channel, the middle flow channel and the outer flow channel are alternately arranged in the flow direction of the liquid (specifically, as shown in FIG. Figure 1 As shown, the fluid in the inner flow channel flows from bottom to top, the fluid in the middle flow channel flows from top to bottom, and the fluid in the outer flow channel flows from bottom to top). Without increasing the size of the cylinder, the overall length of the fluid flow channel is increased, thereby extending the time for the crystal seed particles to gather, making the water flow path more tortuous and complex, forcing all water bodies to pass through a sufficient flocculation reaction zone (flocculation reaction chamber), ensuring uniform mixing between the reagent and the sludge particles. The increase in the flow path length increases the chance of collision between particles, allowing fine particles to have more time to gather into larger particles, thereby reducing the turbidity of the external drainage. The test results show that the turbidity of water obtained through the solid-liquid separation circulating granulation fluidized bed can be reduced to below 5NTU.

[0043] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention has the advantages of reducing the equipment size and the turbidity of the external drainage.

[0044] A mud collecting area 11 is provided at the lower section of the outer cylinder 1 , and a preset distance is provided between the liquid inlet 301 of the inner cylinder 3 and the mud collecting area 11 in the height direction of the outer cylinder 1 .

[0045] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention has a preset distance between the liquid inlet 301 of the inner cylinder 3 and the mud collection area 11. On the one hand, it can avoid the problem that the length of the inner flow channel and the reaction time are reduced due to the large distance, which causes the turbidity of the external drainage to increase; on the other hand, it can avoid the problem that the stirring of the agitator 4 will disturb the sludge particles in the mud collection area 11 due to the small distance, causing the mud-water mixture in the suspension area to gradually converge to form a suspended sludge layer and water production in the suspension area, which is not conducive to the sedimentation of suspended matter. Therefore, the solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention has the advantage of improving the sludge sedimentation treatment effect.

[0046] The distance between the water inlet of the inner cylinder 3 and the bottom of the outer cylinder 1 is 800mm-1200mm. Similarly, the solid-liquid separation circulating granulation fluidized bed has the advantages of miniaturization of equipment and reduced turbidity. Optionally, the distance between the water inlet of the inner cylinder 3 and the bottom of the outer cylinder 1 can be 800mm, 850mm, 900mm, 950mm, 1000mm, 1050mm, 1100mm, 1150mm and 1200mm.

[0047] like Figure 1 and Figure 2 As shown, the liquid inlet 301 and the flow guide port 302 are arranged opposite to each other in the height direction of the outer cylinder 1, and the drug addition port is arranged between the liquid inlet 301 and the flow guide port 302. It can be understood that the liquid inlet 301 and the flow guide port 302 are arranged at both ends of the inner cylinder 3 in the axial direction.

[0048] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention extends the length of the inner flow channel as much as possible by arranging the liquid inlet 301 and the flow guide port 302 in a relative manner in the height direction of the outer cylinder 1. Furthermore, the solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention helps to reduce the turbidity of the external drainage.

[0049] like Figure 1 and Figure 2 As shown, the inner cylinder 3 includes a sewage inlet section 31 and a granulation section which are sequentially connected, and the sewage inlet section 31 is located above the granulation section. The cross-section of the granulation section is larger than the cross-section of the sewage inlet section 31 to form a stirring static zone at the lower end of the inner cylinder 3. The sewage inlet is located on the sewage inlet section 31, and the guide port 302 is located at the upper end of the granulation section.

[0050] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention includes a sewage inlet section 31 and a granulation section which are sequentially connected and arranged through the inner cylinder 3, and the cross section of the granulation section is larger than the cross section of the sewage inlet section 31, so that a stirring static zone can be formed at the lower end of the inner cylinder 3, and the agitator 4 is further prevented from disturbing the suspended particles in the mud collection area 11. Thus, the particle settling efficiency is further improved and the turbidity of the external drainage is reduced.

[0051] like Figure 1 and Figure 2 As shown, the granulation section includes a first section 33 and a second section 35 . The first section 33 is provided with a first expansion section 32 at the connection with the pollution inlet section 31 , and the second section 35 is provided with a second expansion section 34 at the connection with the first section 33 .

[0052] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention is divided into a granulation section into a first section 33 and a second section 35, the first section 33 is provided with a first expansion section 32 at the connection with the sewage inlet section 31, and the second section 35 is provided with a second expansion section 34 at the connection with the first section 33. Since the flow velocity of the same volume of fluid in a flow channel with a large cross section is lower than that in a flow channel with a small cross section, the flow velocity of the water flow can be gradually reduced along the flow direction of the fluid, which helps to increase the reaction time in the flocculation reaction chamber, and thus helps to settle the solid particles. Furthermore, the solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention has the advantage of helping to further reduce the turbidity of the external drainage.

[0053] Specifically, Figure 2 As shown, the sewage inlet section 31, the first expansion section 32, the first subsection 33, the second expansion section 34 and the second subsection 35 are arranged in sequence from bottom to top.

[0054] The diameter of the sewage inlet section 31 is 350mm-500mm. On the one hand, it avoids the problem that the diameter of the sewage inlet section 31 is too large, causing the negative pressure generated by the blades of the agitator 4 to disturb the sedimentation particles in the mud collection area 11. On the other hand, it avoids the problem that the diameter of the sewage inlet section 31 is too small, causing the water inlet flow rate to be limited, affecting the overall sewage treatment effect.

[0055] Optionally, the diameter of the sewage inlet section 31 is 350 mm, 360 mm, 370 mm, 380 mm, 390 mm, 400 mm, 410 mm, 420 mm, 430 mm, 440 mm, 450 mm, 460 mm, 470 mm, 480 mm, 490 mm and 500 mm.

[0056] The inclination angle of each of the first expansion section 32 and the second section 35 is 40°-50°. On the one hand, the problem of too large an inclination angle causing the central flow channel to be too narrow, resulting in too high a flow velocity of the water therein (too high a flow velocity is not conducive to sedimentation), is avoided. On the other hand, the problem of too small an inclination angle causing the fluid in the inner flow channel to slow down insignificantly, resulting in too short a reaction time of the reactants in the flocculation reaction chamber, resulting in the particles therein not being easy to settle and aggregate, is avoided. Furthermore, the solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention has the advantage of further reducing the turbidity of the external drainage.

[0057] Alternatively, the inclination angle of each of the first expansion section 32 and the second section 35 may be 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, and 50°.

[0058] The diameter of the first segment 33 is 400 mm-800 mm. Optionally, the diameter of the first segment 33 is 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, 650 mm, 700 mm, 750 mm and 800 mm.

[0059] The diameter of the second segment 35 is 2000 mm to 3300 mm. The diameter of the second segment 35 can be 2000 mm, 2100 mm, 2200 mm, 2300 mm, 2400 mm, 2500 mm, 2600 mm, 2700 mm, 2800 mm, 2900 mm, 3000 mm, 3100 mm, 3200 mm and 3300 mm.

[0060] The diameter of the outer cylinder 1 is 3000mm-4000mm. Optionally, the diameter of the outer cylinder 1 can be 3000mm, 3100mm, 3200mm, 3300mm, 3400mm, 3500mm, 3600mm, 3700mm, 3800mm, 3900mm and 4000mm.

[0061] The diameter of the middle cylinder 2 is 2400mm-3700mm. Optionally, the diameter of the middle cylinder 2 can be 2400mm, 2500mm, 2600mm, 2700mm, 2800mm, 2900mm, 3000mm, 3100mm, 3200mm, 3300mm, 3400mm, 3500mm, 3600mm and 3700mm.

[0062] At the same time, the ratio of the cross section of the outer flow channel, the cross section of the middle flow channel and the maximum cross section of the inner flow channel is further defined as 1:0.75-0.85:0.5-0.6.

[0063] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention can ensure a sufficient sedimentation reaction time by limiting the ratio of the cross-sectional area of ​​the outer flow channel, the cross-sectional area of ​​the middle flow channel and the cross-sectional area corresponding to the inner flow channel under this ratio, which helps to further reduce the turbidity of the external drainage. In addition, the cross-sectional area of ​​the lower section of the middle flow channel is larger than the cross-sectional area of ​​the upper section, and then in the middle flow channel, the fluid flows from top to bottom. In the process of flowing downward, the flow rate will decrease due to the increase in cross-sectional area, thereby avoiding the problem of the middle flow channel impacting and stirring the particles in the sludge collection area 11 into the high suspended matter in the flocculation reaction chamber, and making the heavy sludge particles in the sludge suspension layer fall into the sludge collection area 11 again through the mud channel. Therefore, the solid-liquid separation circulating granulation fluidized bed helps to further reduce the turbidity of the external drainage.

[0064] The distance between the lower end of the middle cylinder 2 and the water inlet of the inner cylinder 3 in the height direction of the outer cylinder 1 is 500mm-900mm. This prevents the water with sludge particles at the lower end of the middle cylinder 2 from being sucked into the inner cylinder 3 again due to the weak suction force of the agitator 4 of the inner cylinder 3, thus disrupting the flow direction of the fluid in the outer flow channel, the middle flow channel and the inner flow channel. Therefore, the solid-liquid separation circulating granulation fluidized bed has the advantage of increasing the sedimentation rate.

[0065] Optionally, the distance between the lower end of the middle cylinder 2 and the water inlet of the inner cylinder 3 in the height direction of the outer cylinder 1 can be 500mm, 550mm, 600mm, 650mm, 700mm, 750mm, 800mm and 950mm.

[0066] The rotation speed of the blades of the stirrer 4 is 100-400 rpm.

[0067] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention limits the rotation speed of the blades of the agitator 4. On the one hand, it avoids the problem that the rotation speed of the blades is too high, which will generate a large shear force and may destroy the larger flocs that have been formed, forcing them to be redispersed into smaller particles, thereby reducing the flocculation effect. On the other hand, it avoids the problem that the rotation speed of the blades is too low, which reduces the collision frequency between the flocculant and the sludge particles, and causes uneven distribution of the agent, resulting in a longer flocculation time and poor uniformity. The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention has the advantage of improving the flocculation effect.

[0068] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention also includes a separation device 5, the outer edge of the separation device 5 is connected to the inner wall surface of the outer cylinder 1, and the inner edge of the separation device 5 is connected to the outer wall surface of the middle cylinder 2; the separation device 5 includes a ring plate, the outer edge of the ring plate is connected to the inner wall surface of the outer cylinder 1, the inner edge of the ring plate is connected to the outer wall surface of the middle cylinder 2, and a plurality of inclined holes 51 are provided on the ring plate.

[0069] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention can prevent the sludge particles from overflowing by setting up the separation device 5, because the overflowing sludge particles can collide with the hole wall of the inclined hole 51, and then the particles sink to achieve the separation of water and sludge particles, further reducing the turbidity of the external drainage.

[0070] The embodiments of the present invention are not limited thereto. For example, in other embodiments, the separation device 5 includes a plurality of tubes that are connected and inclined, and each tube has an inclined hole 51 .

[0071] The solid-liquid separation circulating granulation fluidized bed of the embodiment of the present invention has a specific working principle as follows: sewage enters from the bottom of the inner cylinder 3 and is stirred by the blades, the suspended matter begins to flocculate, the sewage flows upward to the top of the middle cylinder 2 and begins to reflux from the outside, and then returns to the bottom to start circulation. The tiny flocculated particles accumulate and become larger with the circulation, and eventually settle to the sludge collecting area 11 to become sludge. The inclined holes 51 in the separation device 5 further prevent the sludge particles from overflowing, and the clean water is discharged from the sump 12 above the fluidized bed, and finally the turbidity removal of the sewage is completed.

[0072] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0074] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A solid-liquid separation circulating granulation fluidized bed, characterized in that: include: An outer cylinder, a middle cylinder and an inner cylinder, wherein the outer cylinder, the middle cylinder and the inner cylinder are arranged in sequence from the outside to the inside, the middle cylinder has a downward opening, and the middle cylinder is inverted in the outer cylinder, at least a portion of the inner cylinder extends from the opening of the middle cylinder into the middle cylinder, and the inner cylinder is provided with a medicine addition port, a liquid inlet at the lower end and a flow guide port at the upper section; An inner flow channel is formed in the inner cylinder, the liquid inlet, the drug addition port and the flow guide port are all connected to the inner flow channel, a middle flow channel is formed between the middle cylinder and the inner cylinder, an outer flow channel is formed between the outer cylinder and the middle cylinder, the inner flow channel, the middle flow channel and the outer flow channel are alternately arranged in the flow direction of the liquid, wherein a flocculation reaction chamber is formed in the inner flow channel; A stirrer is passed through the middle cylinder and the inner cylinder, and the paddles of the stirrer are located in the inner cylinder to drive the fluid to flow in the direction from the liquid inlet to the guide port.

2. The solid-liquid separation circulating granulation fluidized bed according to claim 1, characterized in that: The lower section of the outer cylinder is provided with a mud collecting area, and the liquid inlet of the inner cylinder is spaced apart from the mud collecting area by a preset distance.

3. The solid-liquid separation circulating granulation fluidized bed according to claim 2, characterized in that: The distance between the water inlet of the inner cylinder and the bottom of the outer cylinder is 800mm-1200mm.

4. The solid-liquid separation circulating granulation fluidized bed according to claim 1, characterized in that: The liquid inlet and the flow guide port are arranged opposite to each other in the height direction of the outer cylinder, and the medicine addition port is arranged between the liquid inlet and the flow guide port.

5. The solid-liquid separation circulating granulation fluidized bed according to claim 1, characterized in that: The inner cylinder includes a sewage inlet section and a granulation section which are sequentially connected, and the sewage inlet section is located above the granulation section. The cross-section of the granulation section is larger than the cross-section of the sewage inlet section to form a stirring static zone at the lower end of the inner cylinder. The sewage inlet port is located on the sewage inlet section, and the diversion port is located at the upper end of the granulation section.

6. The solid-liquid separation circulating granulation fluidized bed according to claim 5, characterized in that: The granulation section comprises a first section and a second section. The first section is provided with a first flaring section at a connection with the sewage inlet section, and the second section is provided with a second flaring section at a connection with the first section.

7. The solid-liquid separation circulating granulation fluidized bed according to claim 6, characterized in that: The diameter of the sewage inlet section is 350mm-500mm; The inclination angle of each of the first flared section and the second section is 40°-50°; The diameter of the first segment is 400 mm-800 mm; The diameter of the second segment is 2000mm-3300mm; The diameter of the outer cylinder is 3000mm-4000mm; The diameter of the middle cylinder is 2400mm-3700mm; And / or, the ratio of the cross section of the outer flow channel, the cross section of the middle flow channel and the maximum cross section of the inner flow channel is 1:0.75-0.85:0.5-0.

6.

8. The solid-liquid separation circulating granulation fluidized bed according to claim 1, characterized in that: The distance between the lower end of the middle cylinder and the water inlet of the inner cylinder in the height direction of the outer cylinder is 500mm-900mm; And / or, the rotation speed of the blade of the stirrer is 100-400 rpm; And / or, it also includes a water collecting tank, which is arranged in the upper section of the outer cylinder.

9. The solid-liquid separation circulating granulation fluidized bed according to claim 1, characterized in that: It also includes a separation device, wherein the outer edge of the separation device is connected to the inner wall surface of the outer cylinder, and the inner edge of the separation device is connected to the outer wall surface of the middle cylinder; The separation device comprises a ring plate, the outer edge of the ring plate is connected to the inner wall surface of the outer cylinder, the inner edge of the ring plate is connected to the outer wall surface of the middle cylinder, and the ring plate is provided with a plurality of inclined holes; Alternatively, the separation device comprises a plurality of connected and obliquely arranged tubes, each of which has an inclined hole.

10. The solid-liquid separation circulating granulation fluidized bed according to claim 9, characterized in that: The height difference between the lower end surface of the middle cylinder and the lower end of the inclined hole is 4000mm-5000mm; And / or, the depth of the inclined hole is 200mm-300mm; And / or, the inclined hole has an inclination angle of 40°-50°.

Images