Circulation type fluidized bed reactor for treating chemical wastewater

Abstract

The invention relates to the technical field of sewage treatment, in particular to a circulation type fluidized bed reactor for treating chemical wastewater, which comprises a vertically arranged reaction cylinder, a middle pipe coaxially arranged in the reaction cylinder, a circulation pipe coaxially and slidably arranged in the middle pipe, and a lifting piece arranged on the reaction cylinder and used for driving the circulation pipe to slide. A biological reaction filler is arranged between the outer side wall of the middle pipe and the inner side wall of the reaction cylinder, a stabilizing frame is arranged in the circulating pipe, a stirring shaft coaxial with the circulating pipe is rotationally arranged on the stabilizing frame, the stirring shaft is in vertical sliding fit with the stabilizing frame, and a sliding part for driving the stirring shaft to slide and a rotating part for driving the stirring shaft to rotate are arranged on the reaction cylinder. A stirring disc is coaxially arranged at the bottom of the stirring shaft, a plurality of stirring blades are rotationally arranged on the stirring disc, and an angle adjusting piece for changing the inclination angle of the stirring blades is arranged on the reaction cylinder. The sewage treatment device has the effect of improving the removal efficiency of organic substances in sewage.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a circulating fluidized bed reactor for treating chemical wastewater. Background Art

[0002] Hydrolysis and acidification are the first and second stages of the three-stage theory of anaerobic biological treatment of sewage. Hydrolysis is the process in which microorganisms release free extracellular enzymes and fixed enzymes attached to the outer wall of the cell to complete biocatalytic oxidation reactions, converting suspended solid organic matter into soluble organic substrates and converting difficult-to-degrade macromolecules into small molecules. Acidification is the process in which small molecules entering the cells of fermentation bacteria are decomposed into various volatile fatty acids (VFA), such as acetic acid, propionic acid, butyric acid, and lactic acid, under the action of intracellular enzymes. Through the decomposition of facultative aerobic bacteria in the pool, large molecules of difficult-to-degrade organic matter in sewage are degraded into small molecules that are easily biodegradable, and insoluble substances are hydrolyzed into soluble substances.

[0003] A Chinese patent with announcement number CN101982430A discloses a novel concentric baffled hydrolysis reactor, which includes a hydrolysis acidification reactor body consisting of three concentric circles, wherein the inner circle is a pre-reaction zone, and the middle circle and the outer circle are reaction zones; wastewater enters the pre-reaction zone and is refluxed and mixed with the supernatant, and water distribution is uniform and muddy water is mixed through a circular water distributor, and a low-speed stirring device is provided in the pre-reaction zone.

[0004] During the use of the above technology, due to the strong binding force between the inorganic mud and the organic matter attached to its surface, although a low-speed stirring device is provided in the pre-reaction zone, the inorganic mud and the organic matter attached to its surface cannot be effectively stripped off under the low-speed stirring state, and increasing the stirring speed will increase the turbulence of the incoming water and increase the rising speed of the sewage, thereby making it impossible for the sewage and the return sludge to be fully mixed, resulting in a low separation effect of the inorganic mud and organic matter, which will affect the removal efficiency of the organic matter and has shortcomings. Summary of the invention

[0005] In order to improve the problem of poor separation effect of inorganic mud and organic matter, the present application provides a circulating fluidized bed reactor for treating chemical wastewater.

[0006] The present application provides a circulating fluidized bed reactor for treating chemical wastewater using the following technical solution: A circulating fluidized bed reactor for treating chemical wastewater comprises a vertically arranged reaction cylinder, an intermediate tube is coaxially arranged in the reaction cylinder, a circulating tube is coaxially slidably arranged in the intermediate tube, there are gaps between the outer wall of the intermediate tube and the inner wall of the reaction cylinder, and between the inner wall of the intermediate tube and the outer wall of the circulating tube, a lifting member for driving the circulating tube to slide is arranged on the reaction cylinder, there is a gap between the bottom of the intermediate tube and the bottom of the reaction cylinder, a biological reaction filler is arranged between the outer wall of the intermediate tube and the inner wall of the reaction cylinder, a liquid discharge pipe is arranged on the reaction cylinder at the top of the biological reaction filler, and a liquid inlet pipe and a liquid discharge pipe are arranged at the bottom of the reaction cylinder. A slag discharge pipe, when the bottom of the circulation pipe abuts against the inner bottom of the reaction tube, the connecting point between the liquid inlet pipe and the reaction tube is located inside the circulation tube, a stabilizing frame is arranged inside the circulation tube, a stirring shaft coaxial with the circulation tube is rotatably arranged on the stabilizing frame, the stirring shaft and the stabilizing frame are vertically slidably matched, a sliding part for driving the stirring shaft to slide and a rotating part for driving the stirring shaft to rotate are arranged on the reaction tube, a stirring disk is coaxially arranged at the bottom of the stirring shaft, a plurality of stirring blades are rotatably arranged on the stirring disk, a plurality of the stirring blades are circumferentially arranged on the stirring disk, and an angle adjustment part for changing the inclination angle of the stirring blades is arranged on the reaction tube.

[0007] By adopting the above technical solution, the lifting member drives the circulation tube to slide vertically, so that there is a gap between the top and bottom of the circulation tube and the reaction tube, and then the rotating member drives the stirring shaft to rotate, and the stirring shaft drives the stirring blades to rotate, so that the liquid in the reaction tube circulates and mixes along the bottom of the circulation tube, the top of the circulation tube, the top of the intermediate tube and the bottom of the intermediate tube in sequence. At the same time, the mixed liquid will be reacted by the biological reaction filler and then discharged from the discharge pipe. When it is necessary to separate the organic matter attached to the inorganic mud and sand, the lifting member drives the bottom of the circulation tube to abut against the bottom of the reaction tube, and at the same time At the same time, the sliding member drives the stirring shaft to descend, so that the stirring blade is close to the inner bottom of the reaction tube, and the angle adjusting member changes the inclination angle of the stirring blade to make the stirring blade horizontal. Then the rotating member rotates the stirring blade, so that the inorganic mud and sand at the bottom of the reaction tube are quickly stirred. Due to the isolation constraint of the circulation tube and the horizontal state of the stirring blade, the top of the circulation tube will not increase the flow rate of the liquid, so that the liquid inlet pipe will not increase the flow rate of the wastewater suction, thereby quickly separating the inorganic mud and sand at the bottom of the reaction tube from the organic matter, which is beneficial to improve the removal efficiency of the organic matter.

[0008] Optionally, the lifting component includes a lifting cylinder disposed on the reaction tube and electrically connected to a control system, an ear plate is disposed on the circulating flow tube, and a piston rod of the lifting cylinder is disposed on the ear plate.

[0009] By adopting the above technical solution, the control system starts the lifting cylinder, and the piston rod of the lifting cylinder drives the circulation tube to slide vertically through the ear plate, so as to facilitate the precise control of the position of the circulation tube. When it is necessary to separate the organic matter on the inorganic mud and sand, the circulation tube descends and abuts against the inner bottom of the reaction cylinder, so as to constrain the inorganic mud and sand at the bottom of the circulation tube, which is beneficial to increase the contact probability between the inorganic mud and sand and the stirring blades.

[0010] Optionally, the rotating member includes a rotating motor disposed on the reaction cylinder and electrically connected to a control system, a transmission rod is coaxially arranged on the output shaft of the rotating motor, a slot for inserting the transmission rod is opened on the stirring shaft, and the cross-sections of the transmission rod and the slot are both polygonal.

[0011] By adopting the above technical solution, the control system starts the rotating motor, the output shaft of the rotating motor drives the transmission rod to rotate, and the transmission rod drives the stirring shaft to rotate, thereby achieving the effect of the stirring shaft driving the stirring blades to rotate.

[0012] Optionally, the sliding member includes a rotating disk coaxially arranged on the stirring shaft, the reaction cylinder is provided with a sliding cylinder electrically connected to the control system, the piston rod of the sliding cylinder is provided with a clamping block with a C-shaped cross-section, and the edge of the rotating disk is clamped in the C-shaped groove of the clamping block.

[0013] By adopting the above technical solution, the control system starts the sliding cylinder, the piston rod of the sliding cylinder drives the block to slide, and the block drives the rotating disk to slide synchronously. When the stirring shaft drives the rotating disk to rotate synchronously, relative sliding occurs between the rotating disk and the block. In this process, relative sliding occurs between the transmission rod and the stirring shaft, thereby achieving the effect of adjusting the position of the stirring blade.

[0014] Optionally, the angle adjustment member includes a top rod coaxially arranged at the bottom of the reaction cylinder, the interior of the stirring plate is hollow and the bottom is open, a plurality of rotating shafts are rotatably arranged on the stirring plate, a torsion spring is arranged between the rotating shaft and the stirring plate, one end of the rotating shaft extends to the interior of the stirring plate, the stirring blades are arranged on the rotating shaft, the rotating shaft corresponds to the stirring blades one by one, an angle plate is arranged on the rotating shaft inside the stirring plate, the angle plate and the stirring blade have the same inclination angle, and when the angle plate abuts against the top rod and stops moving, the angle plate is in a horizontal state.

[0015] By adopting the above technical solution, when the piston rod of the sliding cylinder drives the stirring shaft to descend to the maximum distance, the angle plate abuts against the top rod and rotates around the axis of the rotating shaft, and the torsion spring deforms until the angle plate and the stirring blades are both horizontal. When the horizontal stirring blades rotate synchronously with the stirring shaft and under the constraint of the bottom of the circulation tube, the inorganic mud and sand will be quickly stirred and the organic matter will be separated.

[0016] Optionally, a friction ring is coaxially rotatably provided on the push rod, and the friction ring is used to abut against the angle plate.

[0017] By adopting the above technical solution, the friction loss of the angle plate is reduced, which is beneficial to increasing the service life of the angle plate.

[0018] Optionally, a reflux loop is coaxially arranged at the inner bottom of the reaction cylinder, and a buffer rubber strip is arranged at the bottom of the circulation tube, and the buffer rubber strip is used to abut against the reflux loop.

[0019] By adopting the above technical solution, the reflux loop reduces the impact loss of the circulation pipe on the bottom of the reaction tube, and at the same time improves the isolation effect of the circulation pipe on the bottom of the reaction tube.

[0020] Optionally, a plurality of support rods are arranged in the middle tube, and the plurality of support rods are evenly arranged on the middle tube in a circumferential direction, and the support rods are used to abut against the circulating flow tube.

[0021] By adopting the above technical solution, when the liquid in the reaction cylinder is continuously refluxed, the support rod is helpful for the circulation tube to maintain stability.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The lifting member drives the circulation tube to slide vertically, so that there is a gap between the top and bottom of the circulation tube and the reaction tube, and then the rotating member drives the stirring shaft to rotate, and the stirring shaft drives the stirring blades to rotate, so that the liquid in the reaction tube circulates and mixes along the bottom of the circulation tube, the top of the circulation tube, the top of the intermediate tube and the bottom of the intermediate tube in sequence, and at the same time, the mixed liquid will react with the bioreactor filler and then be discharged from the discharge pipe; 2. When it is necessary to separate the organic matter attached to the inorganic mud and sand, the lifting member drives the bottom of the circulation pipe to abut against the bottom of the reaction tube, and at the same time, the sliding member drives the stirring shaft to descend, so that the stirring blade is close to the inner bottom of the reaction tube, and the angle adjustment member changes the inclination angle of the stirring blade to make the stirring blade horizontal. Then the rotating member rotates the stirring blade, so that the inorganic mud and sand at the bottom of the reaction tube are quickly stirred. Due to the isolation constraint of the circulation pipe and the horizontal state of the stirring blade, the top of the circulation pipe will not increase the flow rate of the liquid, so that the liquid inlet pipe will not increase the flow rate of the wastewater suction, and then the inorganic mud and sand at the bottom of the reaction tube are quickly separated from the organic matter, which is conducive to improving the removal efficiency of the organic matter; 3. When the piston rod of the sliding cylinder drives the stirring shaft to descend to the maximum distance, the angle plate abuts against the top rod and rotates around the axis of the rotating shaft, and the torsion spring deforms until the angle plate and the stirring blades are both horizontal. When the horizontal stirring blades rotate synchronously with the stirring shaft and under the constraint of the bottom of the circulation tube, the inorganic mud and sand will be quickly stirred and the organic matter will be separated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0024] Figure 2 It is a cross-sectional view used to reflect the positional relationship between the intermediate tube, the circulating tube and the stirring shaft in the embodiment of the present application.

[0025] Figure 3 yes Figure 2 Enlarged view of part A.

[0026] Figure 4 It is a cross-sectional view used to reflect the positional relationship between the stirring blades and the circulating flow tube when the stirring plate rises to the maximum height in the embodiment of the present application.

[0027] Explanation of the reference numerals: 1. reaction tube; 2. intermediate tube; 3. circulation tube; 4. lifting member; 41. lifting cylinder; 42. ear plate; 5. bioreactor filler; 6. drain pipe; 7. liquid inlet pipe; 8. slag discharge pipe; 9. stabilizing frame; 10. stirring shaft; 11. sliding member; 111. rotating disk; 112. sliding cylinder; 113. block; 12. rotating member; 121. rotating motor; 122. transmission rod; 123. slot; 13. stirring disk; 14. stirring blade; 15. angle adjustment member; 151. push rod; 152. rotating shaft; 153. torsion spring; 154. angle plate; 16. wear-resistant ring; 17. reflux ring; 18. buffer rubber strip; 19. support rod; 20. slag discharge valve. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-Figure 4 This application is described in further detail.

[0029] The embodiment of the present application discloses a circulating fluidized bed reactor for treating chemical wastewater.

[0030] Reference Figure 1 and Figure 2 A circulating fluidized bed reactor for treating chemical wastewater includes a vertically arranged reaction tube 1, an intermediate tube 2 is coaxially welded on the top of the reaction tube 1, a circulating tube 3 is coaxially slidably arranged in the intermediate tube 2, there are gaps between the outer wall of the intermediate tube 2 and the inner wall of the reaction tube 1, and between the inner wall of the intermediate tube 2 and the outer wall of the circulating tube 3, and a lifting member 4 for driving the circulating tube 3 to slide vertically is arranged on the reaction tube 1.

[0031] Reference Figure 2The lifting member 4 includes a plurality of lifting cylinders 41 bolted to the top of the reaction tube 1 and electrically connected to the control system. An ear plate 42 is welded on the circulation tube 3. The piston rod of the lifting cylinder 41 is bolted to the ear plate 42. A return loop 17 is coaxially welded to the inner bottom of the reaction tube 1. The diameter of the return loop 17 gradually increases from the top to the bottom of the reaction tube 1. A buffer rubber strip 18 is bonded to the bottom of the circulation tube 3. The buffer rubber strip 18 is used to abut against the return loop 17.

[0032] Reference Figure 2 There is a gap between the bottom of the middle tube 2 and the bottom of the reaction tube 1. The outer wall of the middle tube 2 and the inner wall of the reaction tube 1 are filled with a biological reaction filler 5. Liquid can flow through the biological reaction filler 5, and the biological reaction filler 5 contains various bacteria for decomposing organic matter. A plurality of support rods 19 are welded inside the middle tube 2, and the plurality of support rods 19 are evenly arranged on the middle tube 2 in a circumferential direction.

[0033] Reference Figure 2 The support rod 19 is used to abut against the circumferential outer wall of the circulation tube 3. A discharge pipe 6 is welded on the reaction cylinder 1 at the top of the biological reaction filler 5. A liquid inlet pipe 7 and a slag discharge pipe 8 are welded at the bottom of the reaction cylinder 1. A slag discharge valve 20 is arranged on the slag discharge pipe 8.

[0034] Reference Figure 2 When the bottom of the circulation tube 3 abuts against the reflux ring tube 17 at the bottom of the reaction tube 1, the connection between the liquid inlet tube 7 and the reaction tube 1 is located inside the circulation tube 3. A stabilizing frame 9 is welded inside the circulation tube 3. A stirring shaft 10 coaxial with the circulation tube 3 is rotatably arranged on the stabilizing frame 9. The stirring shaft 10 and the stabilizing frame 9 are vertically slidably matched. A sliding member 11 for driving the stirring shaft 10 to slide and a rotating member 12 for driving the stirring shaft 10 to rotate are arranged on the reaction tube 1.

[0035] Reference Figure 2 The rotating member 12 includes a rotating motor 121 bolted to the top of the reaction tube 1 and electrically connected to the control system. A transmission rod 122 is coaxially welded to the output shaft of the rotating motor 121. A slot 123 for inserting the transmission rod 122 is opened on the top of the stirring shaft 10. The cross-sections of the transmission rod 122 and the slot 123 are both polygonal.

[0036] Reference Figure 2 The sliding member 11 includes a rotating disk 111 coaxially welded to the top of the stirring shaft 10. A plurality of sliding cylinders 112 electrically connected to the control system are bolted to the top of the reaction tube 1. A block 113 with a C-shaped cross section is welded on the piston rod of the sliding cylinder 112. The edge of the rotating disk 111 is stuck in the C-shaped groove of the block 113.

[0037] Reference Figure 2 and Figure 3A stirring disk 13 is coaxially welded to the bottom of the stirring shaft 10 , and a plurality of stirring blades 14 are rotatably arranged on the stirring disk 13 . The plurality of stirring blades 14 are evenly arranged circumferentially on the stirring disk 13 , and an angle adjustment piece 15 for changing the inclination angle of the stirring blades 14 is arranged on the reaction cylinder 1 .

[0038] The control system starts the lifting cylinder 41, the piston rod of the lifting cylinder 41 contracts and drives the circulation tube 3 to slide vertically upward through the ear plate 42, so that there is a gap between the top and bottom of the circulation tube 3 and the inner wall of the reaction tube 1. At this time, the stirring blade 14 is located in the middle position of the circulation tube 3.

[0039] Then the control system starts the rotating motor 121, and the output shaft of the rotating motor 121 drives the stirring shaft 10 to rotate slowly and synchronously through the transmission rod 122. The stirring shaft 10 drives the stirring blade 14 to rotate through the stirring disk 13. The liquid at the bottom of the circulation tube 3 flows along the inside of the circulation tube 3 to the top of the circulation tube 3, and the liquid at the top of the circulation tube 3 flows from the top of the intermediate tube 2 to the bottom of the intermediate tube 2.

[0040] Part of the liquid flowing to the bottom of the intermediate tube 2 will flow back into the bottom of the circulation tube 3, and the other part will flow to the biological reaction filler 5, and will be discharged from the discharge pipe 6 after reaction in the biological reaction filler 5. The liquid inlet pipe 7 will absorb a certain amount of wastewater, and the organic matter in the newly flowing wastewater will be fully mixed with the liquid refluxed from the bottom of the circulation tube 3 again.

[0041] Reference Figure 2 , Figure 3 and Figure 4 The angle adjustment member 15 includes a top rod 151 coaxially welded to the bottom of the reaction tube 1. The interior of the stirring disk 13 is hollow and the bottom is open. A plurality of rotating shafts 152 are rotatably arranged on the stirring disk 13. A torsion spring 153 is arranged between the rotating shaft 152 and the stirring disk 13. One end of the rotating shaft 152 extends to the interior of the stirring disk 13. The stirring blade 14 is welded to the rotating shaft 152.

[0042] Reference Figure 2 , Figure 3 and Figure 4 The rotating shaft 152 corresponds to the stirring blade 14 one by one. An angle plate 154 is welded on the rotating shaft 152 inside the stirring disk 13. The angle plate 154 has the same inclination angle as the stirring blade 14. A friction ring 16 is coaxially arranged on the top rod 151 for rotation. The friction ring 16 is used to abut against the angle plate 154. When the angle plate 154 abuts against the friction ring 16 on the top rod 151 and stops moving, the angle plate 154 is in a horizontal state.

[0043] When it is necessary to separate the organic matter on the inorganic mud and sand at the bottom of the reaction tube 1, the control system starts the lifting cylinder 41 again, and the piston rod of the lifting cylinder 41 extends and drives the circulation tube 3 to slide vertically downward for a distance through the ear plate 42, so that the buffer strip 18 at the bottom of the circulation tube 3 abuts against the return ring tube 17.

[0044] Then the control system starts the sliding cylinder 112, and the piston rod of the sliding cylinder 112 pushes the rotating disk 111 down a certain distance through the block 113, so that the stirring shaft 10 synchronously drops the same distance, and the stirring shaft 10 and the transmission rod 122 slide relative to each other. At this time, the stirring disk 13 is located at the bottom of the circulation pipe 3.

[0045] As the stirring disk 13 descends, the angle plate 154 at the bottom of the stirring disk 13 gradually abuts against the friction ring 16 on the top rod 151, and the angle plate 154 continuously rotates, while the torsion spring 153 continuously deforms until the stirring disk 13 stops moving. At this time, the angle plate 154 and the stirring blade 14 are both in a horizontal state.

[0046] At this time, the rotating motor 121 drives the stirring shaft 10 to rotate rapidly again, and the stirring blades 14 in a horizontal state will fully stir and mix the materials at the bottom of the reaction tube 1. At the same time, the bottom of the circulation tube 3 will restrict the diffusion range of the materials at the bottom of the reaction tube 1, so that the materials at the bottom of the reaction tube 1 can be quickly mixed and the organic matter can be separated. The stirring blades 14 in a horizontal state will reduce the flow rate of the liquid from the bottom of the circulation tube 3 to the top of the circulation tube 3, thereby reducing the amount of wastewater sucked in by the liquid inlet pipe 7.

[0047] When the stirring blades 14 and the circulation tube 3 rise again and reset, the organic matter that is fully stirred and separated at the bottom of the reaction tube 1 will be fully mixed with the liquid refluxed from the bottom of the circulation tube 3 again, so as to improve the removal effect of the organic matter. At the same time, the liquid refluxed from the bottom of the circulation tube 3 will bring the inorganic mud and sand accumulated under the middle tube 2 back into the bottom of the reaction tube 1 within the reflux ring tube 17. After that, the inorganic mud and sand at the bottom of the reaction tube 1 can be regularly cleaned through the slag discharge pipe 8.

[0048] The implementation principle of a circulating fluidized bed reactor for treating chemical wastewater in an embodiment of the present application is as follows: the control system starts the lifting cylinder 41, the piston rod of the lifting cylinder 41 contracts and drives the circulation tube 3 to slide vertically upward through the ear plate 42, so that there is a gap between the top and bottom of the circulation tube 3 and the inner wall of the reaction tube 1, and at this time, the stirring blade 14 is located in the middle position of the circulation tube 3.

[0049] Afterwards, the control system starts the rotating motor 121, and the output shaft of the rotating motor 121 drives the stirring shaft 10 to rotate synchronously and slowly through the transmission rod 122. At this time, the torsion spring 153 can overcome the reaction force of the liquid during the rotation of the stirring blade 14. The stirring shaft 10 drives the stirring blade 14 to rotate through the stirring disk 13. The liquid at the bottom of the circulation tube 3 flows along the inside of the circulation tube 3 to the top of the circulation tube 3, and the liquid at the top of the circulation tube 3 flows from the top of the intermediate tube 2 to the bottom of the intermediate tube 2.

[0050] Part of the liquid flowing to the bottom of the intermediate tube 2 will flow back into the bottom of the circulation tube 3, and the other part will flow to the biological reaction filler 5, and will be discharged from the discharge pipe 6 after reaction in the biological reaction filler 5. The liquid inlet pipe 7 will absorb a certain amount of wastewater, and the organic matter in the newly flowing wastewater will be fully mixed with the liquid refluxed from the bottom of the circulation tube 3 again.

[0051] When it is necessary to separate the organic matter on the inorganic mud and sand at the bottom of the reaction tube 1, the control system starts the lifting cylinder 41 again, and the piston rod of the lifting cylinder 41 extends and drives the circulation tube 3 to slide vertically downward for a distance through the ear plate 42, so that the buffer strip 18 at the bottom of the circulation tube 3 abuts against the return ring tube 17.

[0052] Then the control system starts the sliding cylinder 112, and the piston rod of the sliding cylinder 112 pushes the rotating disk 111 down a certain distance through the block 113, so that the stirring shaft 10 synchronously drops the same distance, and the stirring shaft 10 and the transmission rod 122 slide relative to each other. At this time, the stirring disk 13 is located at the bottom of the circulation pipe 3.

[0053] As the stirring disk 13 descends, the angle plate 154 at the bottom of the stirring disk 13 gradually abuts against the friction ring 16 on the top rod 151, and the angle plate 154 continuously rotates, while the torsion spring 153 continuously deforms until the stirring disk 13 stops moving. At this time, the angle plate 154 and the stirring blade 14 are both in a horizontal state.

[0054] At this time, the rotating motor 121 drives the stirring shaft 10 to rotate rapidly again, and the stirring blades 14 in a horizontal state will fully stir and mix the materials at the bottom of the reaction tube 1. At the same time, the bottom of the circulation tube 3 will restrict the diffusion range of the materials at the bottom of the reaction tube 1, so that the materials at the bottom of the reaction tube 1 can be quickly mixed and the organic matter can be separated. The stirring blades 14 in a horizontal state will reduce the flow rate of the liquid from the bottom of the circulation tube 3 to the top of the circulation tube 3, thereby reducing the amount of wastewater sucked in by the liquid inlet pipe 7.

[0055] When the stirring blades 14 and the circulation tube 3 rise again and reset, the organic matter that is fully stirred and separated at the bottom of the reaction tube 1 will be fully mixed with the liquid refluxed from the bottom of the circulation tube 3 again, so as to improve the removal effect of the organic matter. At the same time, the liquid refluxed from the bottom of the circulation tube 3 will bring the inorganic mud and sand accumulated under the middle tube 2 back into the bottom of the reaction tube 1 within the reflux ring tube 17. After that, the inorganic mud and sand at the bottom of the reaction tube 1 can be regularly cleaned through the slag discharge pipe 8.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A circulating fluidized bed reactor for treating chemical wastewater, characterized in that: The invention comprises a reaction cylinder (1) arranged vertically, wherein an intermediate tube (2) is coaxially arranged in the reaction cylinder (1), a circulation tube (3) is coaxially slidably arranged in the intermediate tube (2), there is a gap between the outer wall of the intermediate tube (2) and the inner wall of the reaction cylinder (1), and between the inner wall of the intermediate tube (2) and the outer wall of the circulation tube (3), the reaction cylinder (1) is provided with a lifting member (4) for driving the circulation tube (3) to slide, there is a gap between the bottom of the intermediate tube (2) and the bottom of the reaction cylinder (1), a biological reaction filler (5) is arranged between the outer wall of the intermediate tube (2) and the inner wall of the reaction cylinder (1), a liquid discharge pipe (6) is arranged on the reaction cylinder (1) at the top of the biological reaction filler (5), a liquid inlet pipe (7) and a slag discharge pipe (8) are arranged at the bottom of the reaction cylinder (1), and when the bottom of the circulation tube (3) is aligned with the bottom of the reaction cylinder (1), a liquid discharge pipe (6) is arranged on the reaction cylinder (1), and a liquid inlet pipe (7) and a slag discharge pipe (8) are arranged at the bottom of the reaction cylinder (1). When the inner bottom of the cylinder (1) abuts, the connection point between the liquid inlet pipe (7) and the reaction cylinder (1) is located inside the circulation tube (3); a stabilizing frame (9) is arranged inside the circulation tube (3); a stirring shaft (10) coaxial with the circulation tube (3) is rotatably arranged on the stabilizing frame (9); the stirring shaft (10) and the stabilizing frame (9) are vertically slidably matched; a sliding member (11) for driving the stirring shaft (10) to slide and a rotating member (12) for driving the stirring shaft (10) to rotate are arranged on the reaction cylinder (1); a stirring disk (13) is coaxially arranged at the bottom of the stirring shaft (10); a plurality of stirring blades (14) are rotatably arranged on the stirring disk (13); the plurality of stirring blades (14) are circumferentially arranged on the stirring disk (13); and an angle adjustment member (15) for changing the inclination angle of the stirring blades (14) is arranged on the reaction cylinder (1).

2. A circulating fluidized bed reactor for treating chemical wastewater according to claim 1, characterized in that: The lifting member (4) comprises a lifting cylinder (41) which is arranged on the reaction tube (1) and electrically connected to a control system. An ear plate (42) is arranged on the circulating flow tube (3), and a piston rod of the lifting cylinder (41) is arranged on the ear plate (42).

3. A circulating fluidized bed reactor for treating chemical wastewater according to claim 2, characterized in that: The rotating member (12) comprises a rotating motor (121) which is arranged on the reaction cylinder (1) and electrically connected to a control system. A transmission rod (122) is coaxially arranged on the output shaft of the rotating motor (121). A slot (123) for inserting the transmission rod (122) is provided on the stirring shaft (10). The cross sections of the transmission rod (122) and the slot (123) are both polygonal.

4. A circulating fluidized bed reactor for treating chemical wastewater according to claim 3, characterized in that: The sliding member (11) comprises a rotating disk (111) coaxially arranged on the stirring shaft (10); the reaction cylinder (1) is provided with a sliding oil cylinder (112) electrically connected to a control system; a clamping block (113) with a C-shaped cross section is provided on a piston rod of the sliding oil cylinder (112); and an edge of the rotating disk (111) is clamped in a C-shaped groove of the clamping block (113).

5. A circulating fluidized bed reactor for treating chemical wastewater according to claim 4, characterized in that: The angle adjustment member (15) comprises a push rod (151) coaxially arranged at the bottom of the reaction cylinder (1); the interior of the stirring disk (13) is hollow and the bottom is open; a plurality of rotating shafts (152) are rotatably arranged on the stirring disk (13); a torsion spring (153) is arranged between the rotating shaft (152) and the stirring disk (13); one end of the rotating shaft (152) extends to the interior of the stirring disk (13); the stirring blade (14) is arranged on the rotating shaft (152); the rotating shaft (152) corresponds to the stirring blade (14) one by one; an angle plate (154) is arranged on the rotating shaft (152) inside the stirring disk (13); the angle plate (154) and the stirring blade (14) have the same inclination angle; when the angle plate (154) abuts against the push rod (151) and stops moving, the angle plate (154) is in a horizontal state.

6. A circulating fluidized bed reactor for treating chemical wastewater according to claim 5, characterized in that: A friction ring (16) is coaxially rotatably arranged on the push rod (151), and the friction ring (16) is used to abut against the angle plate (154).

7. A circulating fluidized bed reactor for treating chemical wastewater according to claim 2, characterized in that: A reflux loop (17) is coaxially arranged at the inner bottom of the reaction cylinder (1), and a buffer rubber strip (18) is arranged at the bottom of the circulation pipe (3), and the buffer rubber strip (18) is used to abut against the reflux loop pipe (17).

8. A circulating fluidized bed reactor for treating chemical wastewater according to claim 1, characterized in that: A plurality of support rods (19) are arranged in the middle tube (2); the plurality of support rods (19) are evenly arranged on the middle tube (2) in the circumferential direction; and the support rods (19) are used to abut against the circulating flow tube (3).

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