Internal circulating fluidized bed sewage and wastewater treatment device with adjustable aeration height

Abstract

The utility model discloses an aeration height adjustable internal circulating fluidized bed sewage and wastewater treatment device, which relates to the technical field of sewage and wastewater treatment and comprises an internal circulating fluidized bed main body, an aeration height adjusting component and an air supply pipeline, by arranging an inner guide cylinder, an inner guide cylinder bracket, a profile steel bracket, a profile steel guide rail, an aeration pipe, an aerator, an air supply hose, limiting profile steel, a counterweight support and the like in an inner circulating fluidized bed main body and integrating the technologies of no replacement of an air blower, adjustable aeration height and the inner circulating fluidized bed, the air blower does not need to work at overclocking, the steady flow dead zone of the sewage / wastewater treatment system is reduced, and the service life of the system is prolonged. A rope / rope lifting mode is adopted to avoid the problems of corrosion prevention and lubrication of a lifting facility of an aeration system, non-drainage maintenance is realized, the internal circulation flow rate is controlled by adjusting the height, and the treatment capacity of a sewage / wastewater treatment system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage and wastewater treatment, in particular to a sewage and wastewater treatment device with an internal circulation fluidized bed and adjustable aeration height. Background Art

[0002] Adjusting the aeration height is one of the methods to improve the overpressure operation and underpressure aeration of the blower without replacing the blower. However, the adjustment of the aeration height may cause a steady flow dead zone to form in the bottom area of ​​the system, reducing the treatment capacity of the sewage / wastewater treatment system.

[0003] Internal circulating fluidized bed is one of the processes for biochemical treatment of sewage / wastewater. On the basis of activated sludge method, internal flow guide components are set up, local power areas are set up, and blowers, water pumps, flow pushers and other equipment are used to provide power to make the fluid flow in the power area, realize the circulation transfer of fluid between the power area and the non-power area, realize the internal circulation flow of the system fluid, enhance the turbulent state of the fluid in the system, improve the mass transfer effect of the water, air and mud phases in the system, thereby improving the biochemical treatment effect.

[0004] Blower oxygen aeration is an important action that affects the effect of biochemical treatment of sewage / wastewater. The quality of oxygen aeration directly affects the effect of biochemical treatment of sewage / wastewater. Blower under-pressure aeration is manifested as a decrease in aeration flux, which weakens the oxygen aeration effect and may lead to weakened biochemical treatment of sewage / wastewater and substandard effluent quality.

[0005] At present, the main ways to improve the blower overpressure and underpressure aeration caused by increasing the liquid level of the sewage / wastewater treatment system without replacing the blower are:

[0006] (1) Use a frequency converter to make the blower work at an overclocked frequency, increase the blower power consumption and achieve an increase in output air pressure and output air volume.

[0007] (2) Increase the height of the aeration pipe to reduce the aeration environment pressure.

[0008] At present, the main way to increase the aeration height is through screw lifting, and its main purposes are: 1. Adjust the level of the aeration system to ensure uniform aeration (such as: "A height-adjustable aeration system" (CN 219730668 U)); 2. Lift the aeration system to the liquid surface to achieve non-drainage and non-stop maintenance (such as: "An adjustable aeration device" (CN209383502U)); 3. Achieve free change of aeration height (such as: "An aerator capable of adjusting the installation height" (CN114455726A)).

[0009] At present, there are relevant reports on the internal circulation fluidized bed process from technical specifications (such as "Technical Specifications for Internal Circulation Aerobic Biological Fluidized Bed Wastewater Treatment Engineering" (HJ 2021-2012)), journals (such as: Chen Zisheng, Zhang Tao, Mai Lijie, et al. Numerical simulation analysis of square fluidized bed structural parameter changes and internal component strengthening [J]. Chemical Industry Progress, 2017, 36(06): 1997-2009), patents (such as: "A three-phase internal circulation fluidized bed for organic wastewater treatment Enhanced mass transfer system and method" (CN117486412 A)). The technical solution mainly includes:

[0010] (1) By setting up a single or multiple internal flow-guiding components, the internal circulation effect of the fluid is achieved, the turbulent state of the fluid is improved, the mass transfer effect of the water, air and mud phases in the system is improved, and efficient sewage / wastewater treatment is achieved.

[0011] (2) The aeration systems are all installed on fixed support frames, and the devices cannot be lifted or moved.

[0012] The shortcomings of the prior art are as follows:

[0013] (1) Without replacing the blower, the frequency converter is used to make the blower motor work at an overclocked frequency. The safe overclocking range is 55~60 Hz, and the corresponding ability to increase the output air pressure and output air volume is limited. At the same time, the overclocking of the blower increases its energy consumption and working current, which may seriously cause the motor to overload and burn, and the power supply cable to fuse.

[0014] (2) Without replacing the blower, raising the height of the aeration pipe to reduce the aeration environment pressure can avoid the blower overpressure operation and underpressure aeration problems. However, the adjustment of the aeration height may cause a steady flow dead zone to form in the bottom area, reducing the treatment capacity of the sewage / wastewater treatment system.

[0015] (3) The main way to increase the aeration height is to operate it through a lifting screw. The lifting screw is a steel structure and is immersed in aerated and oxygenated water and the water-air interface area for a long time, which has high requirements for corrosion protection and lubrication.

[0016] (4) The internal circulation fluidized bed aeration system is fixed on the support frame, and the aeration system cannot be lifted and moved. The tank body must be emptied before maintenance. The internal circulation flow rate can only be adjusted by controlling the ventilation flux. At the same time, for projects that transform the sewage / wastewater treatment system or do not stop production, it is impossible to avoid the problem of under-pressure aeration without replacing the blower.

[0017] In summary, there is an urgent need to develop an internal circulating fluidized bed sewage and wastewater treatment device with adjustable aeration height to solve the problem of blower overpressure and underpressure aeration when the liquid level of the sewage / wastewater treatment system is increased but the blower is not replaced during the transformation of the sewage / wastewater treatment system or the transformation without stopping production; the overpressure operation of the blower causes the internal components of the blower to be subjected to high pressure, causing damage to the seals and mechanical parts, and may seriously cause the motor to be overloaded and burned; underpressure aeration leads to reduced aeration flux of the sewage / wastewater treatment system and reduced oxygen supply efficiency of the system. Utility Model Content

[0018] The technical problem to be solved by the utility model is to overcome the existing defects and provide a sewage / wastewater treatment device with an internal circulation fluidized bed with adjustable aeration height, which integrates the technologies of not replacing the blower, adjustable aeration height and internal circulation fluidized bed, so as to realize the blower working without overclocking, reduce the steady flow dead zone of the sewage / wastewater treatment system, adopt the rope / cable lifting method to avoid the corrosion and lubrication problems of the lifting facilities of the aeration system, realize non-drainage maintenance and control the internal circulation flow rate by adjusting the height, and ensure the treatment capacity of the sewage / wastewater treatment system.

[0019] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sewage treatment device with an internal circulating fluidized bed with adjustable aeration height, comprising an internal circulating fluidized bed body, an aeration height adjustment component arranged above the top of the internal circulating fluidized bed body, and an air supply pipeline arranged outside the internal circulating fluidized bed body; the air supply pipeline is used to transport compressed air to the internal circulating fluidized bed body;

[0020] The internal circulating fluidized bed body comprises:

[0021] An inner guide tube, which is arranged in the inner circulating fluidized bed body;

[0022] A steel guide rail, which is arranged inside the inner guide cylinder;

[0023] An inner guide tube bracket is arranged outside the inner guide tube, and the inner guide tube bracket is matched with the steel guide rail to support and fix the inner guide tube;

[0024] An aeration pipe is arranged in the inner guide tube; a plurality of aerators are installed on the aeration pipe; the aeration pipe is used to deliver compressed air to the aerator;

[0025] The aerator is used to release air, and various forms of aerators such as disc aerators, tube aerators, rotary mixing aerators, aeration hoses, etc. can be set according to the requirements of aeration service area, aeration flux, aeration depth, etc.;

[0026] An air supply hose, which is arranged between the aeration pipe and the air supply pipeline and is used to connect the aeration pipe and the air supply pipeline;

[0027] A steel support, which is arranged at the bottom of the aeration pipe and is used to support the aeration pipe and the aerator;

[0028] A limiting steel section is fixed on the steel section bracket and cooperates with the steel section guide rail to limit the horizontal position of the steel section bracket;

[0029] The counterweight support is arranged below the steel support; the counterweight support is a steel-concrete structure and is used to limit the minimum height of the steel support and use its weight to prevent the aeration height from being changed due to the change of the rising force during the aeration process.

[0030] Furthermore, the inner guide tube may be of one-stage or multi-stage type.

[0031] Furthermore, the aeration height adjustment assembly includes a cantilever bracket, a two-way self-locking hand winch, a movable cantilever, a lifting rope and a connecting rope. The cantilever bracket is installed above the top of the internal circulating fluidized bed body. The cantilever bracket is provided with a movable cantilever. The movable cantilever includes a vertical arm and a horizontal cantilever. The two-way self-locking hand winch is provided on the vertical arm. A pulley is provided at the right end of the horizontal cantilever. One end of the lifting rope is connected to the two-way self-locking hand winch, and the other end passes through the pulley and is connected to the middle of the connecting rope. The connecting rope is connected to the steel bracket.

[0032] Furthermore, the bidirectional self-locking hand winch is a steel structure, which cooperates with the connecting rope and the lifting rope to realize the vertical movement of the steel support, and utilizes its own bidirectional self-locking structure to make the lifting height controllable and realize the adjustable aeration height; at the same time, the bidirectional self-locking hand winch is effectively supported by the cantilever bracket and the movable cantilever, and cooperates with the counterweight support to ensure the stability of the adjusted aeration height.

[0033] Furthermore, the cantilever support is a steel structure for supporting the movable cantilever and the steel support; the movable cantilever is a steel structure for supporting the steel support.

[0034] Furthermore, the inner guide tube divides the main body of the internal circulating fluidized bed into an ascending zone and a descending zone, the area ratio of the ascending zone to the descending zone is 1~1.5:1, the height of the inner guide tube from the bottom of the main body of the internal circulating fluidized bed is 0.5~0.8 m, and the height from the liquid level in the main body of the internal circulating fluidized bed is 0.5~0.8 m.

[0035] Furthermore, it also includes a U-shaped pipe code, which is a steel structure and is used to fix the aeration pipe to the steel support.

[0036] Furthermore, the main body of the internal circulating fluidized bed is a circular pool body or a rectangular pool body, the main body of the internal circulating fluidized bed is a reinforced concrete structure or a steel structure, and the inner guide tube is welded from steel structure plates.

[0037] Furthermore, the main body of the internal circulating fluidized bed is a circular pool body, and the ratio of the liquid level height in the circular pool body to the pool body diameter is not less than 1.

[0038] Furthermore, the main body of the internal circulating fluidized bed is a rectangular pool body, and the ratio of the liquid level height in the rectangular pool body to the pool body width is not less than 1.

[0039] Furthermore, it also includes a pipe connector for connecting the air supply hose with the air supply pipe and the aeration pipe; the connection form of the pipe connector can be any one of a flange, a thread, a quick connector, and a pagoda connector.

[0040] Furthermore, an air supply valve is provided between the air supply pipeline and the pipeline connector, and the air supply valve is used to adjust the compressed air delivery volume of the internal circulating fluidized bed.

[0041] Furthermore, the aeration tube is made of rigid polyvinyl chloride (UPVC) material, the air supply hose is a steel hose or a stainless steel hose, and the air supply pipeline is a galvanized steel pipe or a stainless steel pipe.

[0042] Furthermore, the inner guide tube bracket, steel bracket, limit steel, steel guide rail, and U-shaped pipe bracket are all steel structures.

[0043] Furthermore, the connecting rope and the lifting rope are steel wire ropes or geotextile ropes, specifically in the form of ropes, cables, chains, etc. The connecting rope is used to connect the lifting rope, and the lifting rope is used to connect the connecting rope. Both cooperate with the two-way self-locking hand winch to enable the steel support to move vertically.

[0044] The principle of this utility model is as follows:

[0045] The utility model adopts the internal circulation fluidized bed process and is implemented in the following manner: an internal guide tube is arranged in the main body of the internal circulation fluidized bed; the internal guide tube is supported and fixed by an internal guide tube bracket and a steel guide rail; the internal guide tube divides the main body of the internal circulation fluidized bed into an ascending area and a descending area, and the above-mentioned device with adjustable aeration height is arranged in the ascending area, and air flotation is used to provide ascending power for sewage / wastewater and biochemical sludge, so as to realize the internal circulation state of the system fluid ascending in the ascending area / descending in the descending area, thereby reducing the steady flow dead zone in the sewage / wastewater treatment system; the internal guide tube realizes a smaller aeration area, realizes a greater aeration efficiency under the same aeration flux or a less air supply flux under the same aeration efficiency; the internal circulation effect realized by the internal guide tube enhances the turbulent state in the sewage / wastewater treatment system, makes the water, air and mud three phases in the system fully mixed, increases the contact base number between microorganisms and pollutants and oxygen, and thus improves the treatment load of the sewage / wastewater treatment system.

[0046] The utility model is implemented in the following way: compressed air is delivered by the air supply pipeline, and connected to the aeration pipe through the air supply hose, and finally released from the aerator to realize aeration, and the compressed air delivery flux is controlled by the air supply valve to adjust the valve opening; the aeration pipe is fixed to the steel support through the U-shaped pipe code; the steel support is limited to a fixed horizontal position by the steel guide rail, and at the same time, its minimum height is limited by the counterweight support to avoid the change of the rising force during the aeration process to change the aeration height; the sewage / wastewater treatment system adopts a bendable and movable air supply hose to ensure that the vertical movement of the steel support is not restricted; the steel support is connected to the lifting rope through the connecting rope, and the vertical length of the lifting rope can be adjusted and locked by the two-way self-locking hand winch to realize the adjustable aeration height. The vertical length of the lifting rope can also be shortened by the two-way self-locking hand winch to lift it above the liquid surface for maintenance, so as to realize non-drainage maintenance.

[0047] Compared with the prior art, the beneficial effects of the device of the utility model are:

[0048] 1. The utility model can adapt to the blower overpressure operation and underpressure aeration caused by increasing the system liquid level in the sewage / wastewater treatment system renovation or non-stop renovation project by adjusting the aeration height without adding a frequency converter or replacing the blower.

[0049] 2. The utility model device adopts an internal circulation fluidized bed main structure, which can effectively avoid the problem of forming a steady flow dead zone in the bottom area due to adjusting the aeration height.

[0050] 3. The utility model adopts connecting ropes in the form of ropes, lines, chains, etc., in combination with a two-way self-locking hand winch, thereby avoiding the problems of high corrosion resistance and lubrication requirements of the lifting screw.

[0051] 4. The aeration height adjustment component limits the minimum aeration height through the counterweight support and provides gravity to prevent the aeration height from changing due to the change of the rising force during the aeration process. The aeration height is controlled and adjusted by adjusting and locking the length of the connecting rope through the two-way self-locking hand winch. At the same time, the aeration facility can be lifted above the liquid level for maintenance, realizing maintenance without drainage.

[0052] 5. The utility model adopts a flexible and movable air supply hose to connect the aeration pipe and the air supply pipeline, ensuring that the aeration height is not restricted during adjustment.

[0053] 6. The device is technically safe and reliable, and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the structure of the utility model;

[0055] Figure 2 This is a top view of the structure of the utility model;

[0056] Figure 3 for Figure 2 Schematic diagram of partial enlarged structure;

[0057] Figure 4 (a) Figure 4 (b) is a schematic structural diagram of the positional relationship between the inner draft tube and the inner draft tube bracket when the main body of the internal circulating fluidized bed is a rectangular pool body;

[0058] Figure 5 (a) Figure 5 (b) is a schematic diagram of the positional relationship between the inner draft tube and the inner draft tube support of the inner circulating fluidized bed, in which the main body is a circular pool;

[0059] In the figure: 1-internal circulating fluidized bed body, 2-inner guide tube, 3-inner guide tube bracket, 4-aerator, 5-aeration pipe, 6-air supply pipeline, 7-air supply hose, 8-pipeline connector, 9-air supply valve, 10-steel bracket, 11-limiting steel, 12-counterweight support, 13-U-type pipe code, 14-steel guide rail, 15-connecting rope, 16-lifting rope, 17-two-way self-locking hand winch, 18-cantilever bracket, 19-movable cantilever, 20-ascending area, 21-descending area. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0061] For example, see Figures 1 to 3 , Figure 4 (a) Figure 4 (b) The utility model provides an internal circulating fluidized bed sewage and wastewater treatment device with adjustable aeration height, comprising an internal circulating fluidized bed body 1, an aeration height adjustment component arranged above the top of the internal circulating fluidized bed body 1, and an air supply pipe 6 arranged outside the internal circulating fluidized bed body 1, the air supply pipe 6 is used to transport compressed air to the internal circulating fluidized bed body 1;

[0062] The internal circulating fluidized bed body 1 comprises:

[0063] The inner guide tube 2 is arranged in the inner circulating fluidized bed body 1 and can be of one-stage or multi-stage type.

[0064] A steel guide rail 14, which is arranged inside the inner guide tube 2;

[0065] The inner guide tube bracket 3 is arranged on the left and right sides of the inner guide tube 2. The inner guide tube bracket 3 is matched with the steel guide rail 14 to support and fix the inner guide tube 2;

[0066] An aeration pipe 5 is arranged in the inner guide tube 2; a plurality of aerators 4 are installed on the aeration pipe 5; the aeration pipe 5 is used to deliver compressed air to the aerators 4;

[0067] The aerator 4 is used to release air, and various types of aerators such as disc aerators, tube aerators, rotary mixing aerators, aeration hoses, etc. can be set according to the requirements of aeration service area, aeration flux, aeration depth, etc.

[0068] An air supply hose 7, which is disposed between the aeration pipe 5 and the air supply pipeline 6, and is used to connect the aeration pipe 5 and the air supply pipeline 6;

[0069] A steel support 10 is disposed at the bottom of the aeration pipe 5 and is used to support the aeration pipe 5 and the aerator 4;

[0070] The limiting steel 11 is fixed on the steel support 10 and cooperates with the steel guide rail 14 to limit the horizontal position of the steel support 10;

[0071] The counterweight support 12 is arranged below the steel support 10; the counterweight support is a steel-concrete structure and is used to limit the minimum height of the steel support. At the same time, its weight is used to prevent the aeration height from being changed due to the change of the lifting force during the aeration process.

[0072] Furthermore, the aeration height adjustment assembly includes a cantilever bracket 18, a two-way self-locking hand winch 17, a movable cantilever 19, a lifting rope 16 and a connecting rope 15. The cantilever bracket 18 is installed above the top of the internal circulating fluidized bed body 1. The cantilever bracket 18 is provided with a movable cantilever 19. The movable cantilever 19 includes a vertical arm and a horizontal cantilever. The vertical arm is provided with a two-way self-locking hand winch 17. A pulley is provided at the right end of the horizontal cantilever. One end of the lifting rope 16 is connected to the two-way self-locking hand winch 17, and the other end passes through the pulley and is connected to the middle of the connecting rope 15. The connecting rope 15 is connected to the steel support 10.

[0073] Furthermore, the two-way self-locking hand winch 17 is a steel structure, which cooperates with the connecting rope 15 and the lifting rope 16 to realize the vertical movement of the steel support 10, and utilizes its own two-way self-locking structure to make the lifting height controllable, thereby realizing adjustable aeration height; at the same time, the two-way self-locking hand winch 17 is effectively supported by the cantilever bracket 18 and the movable cantilever 19, and cooperates with the counterweight support 12 to ensure the stability of the adjusted aeration height.

[0074] Furthermore, the cantilever support 18 is a steel structure for supporting the movable cantilever 19 and the steel support 10 ; the movable cantilever 19 is a steel structure for supporting the steel support 10 .

[0075] Furthermore, the main body 1 of the internal circulating fluidized bed is a reinforced concrete structure or a steel structure, the inner guide tube 2 is welded from a steel structure plate, the main body 1 of the internal circulating fluidized bed is a rectangular pool body, the inner guide tube 2 divides the main body 1 of the internal circulating fluidized bed into an ascending zone 20 and a descending zone 21, the area ratio of the ascending zone 20 to the descending zone 21 is 1~1.5:1, the height of the inner guide tube 2 from the bottom of the pool body is 0.5~0.8 m, the height from the liquid level of the pool body is 0.5~0.8 m, and the ratio of the liquid level height in the rectangular pool body to the width of the pool body is not less than 1.

[0076] Furthermore, it also includes a U-shaped pipe code 13 , which is a steel structure and is used to fix the aeration pipe 5 to the steel support 10 .

[0077] Furthermore, it also includes a pipe connector 8 for connecting the air supply hose 7 with the air supply pipe 6 and the aeration pipe 5; the connection form of the pipe connector 8 can be any one of a flange, a thread, a quick connector, and a pagoda connector.

[0078] Furthermore, an air supply valve 9 is provided between the air supply pipeline 6 and the pipeline connector 8 for adjusting the compressed air delivery amount of the internal circulating fluidized bed.

[0079] Furthermore, the aeration tube 5 is made of rigid polyvinyl chloride (UPVC), the air supply hose 7 is a steel hose or a stainless steel hose, and the air supply pipe 6 is a galvanized steel pipe or a stainless steel pipe.

[0080] Furthermore, the inner guide tube bracket 3, the steel bracket 10, the limiting steel 11, the steel guide rail 14, and the U-shaped pipe code 13 are all steel structures.

[0081] Furthermore, the connecting rope 15 and the lifting rope 16 are steel wire ropes, specifically in the form of ropes, cables, chains, etc. The connecting rope 15 is used to connect the lifting rope 16, and the lifting rope 16 is used to connect the connecting rope 15. Both cooperate with the two-way self-locking hand winch 17 to enable the steel support 10 to move vertically.

[0082] Example 2, see Figure 5 (a) Figure 5 (b) This embodiment is different from the first embodiment in that:

[0083] The main body 1 of the internal circulating fluidized bed is a circular pool body, and the ratio of the liquid level height in the circular pool body to the pool body diameter is not less than 1.

[0084] The inner guide tube bracket 3 is arranged on the front, rear, left and right sides of the inner guide tube 2; the rest of the structure is the same as that of the first embodiment.

[0085] The principle of this utility model is as follows:

[0086] The utility model adopts the internal circulation fluidized bed process and is implemented in the following manner: an internal guide tube 2 is arranged in the internal circulation fluidized bed body 1; the internal guide tube 2 is supported and fixed by the internal guide tube bracket 3 and the steel guide rail 14; the internal guide tube 2 divides the internal circulation fluidized bed body 1 into an ascending area 20 and a descending area 21, and an aeration height adjustment component is arranged in the ascending area 20, and air flotation is used to provide ascending power for sewage / wastewater and biochemical sludge, so as to realize the internal circulation state of the system fluid ascending in the ascending area 20 and descending in the descending area 21, thereby reducing the steady flow dead zone in the sewage / wastewater treatment system; the internal guide tube 2 realizes a smaller aeration area, realizes a greater aeration efficiency under the same aeration flux or a less air supply flux under the same aeration efficiency; the internal circulation effect realized by the internal guide tube 2 enhances the turbulent state in the sewage / wastewater treatment system, makes the water, air and mud three phases in the system fully mixed, increases the contact base number of microorganisms with pollutants and oxygen, and thus improves the treatment load of the sewage / wastewater treatment system.

[0087] The utility model is implemented in the following way: compressed air is delivered by the air supply pipe 6, and connected to the aeration pipe 5 through the air supply hose 7, and finally released from the aerator 4 to realize aeration, and the compressed air delivery flux is controlled by the air supply valve 9 adjusting the valve opening; the aeration pipe 5 is fixed to the steel support 10 through the U-shaped pipe code 13; the steel support 10 is limited to a fixed horizontal position by the steel guide rail 14, and at the same time is limited by the counterweight support 12 to limit its minimum height and avoid the change of the rising force during the aeration process to change the aeration height; the sewage / wastewater treatment system adopts a bendable and movable air supply hose 7 to ensure that the vertical movement of the steel support 10 is not restricted; the steel support 10 is connected to the lifting rope 16 through the connecting rope 15, and the vertical length of the lifting rope 16 can be adjusted and locked through the two-way self-locking hand winch 17 to realize the adjustable aeration height. The vertical length of the lifting rope 16 can also be shortened by the two-way self-locking hand winch 17 to lift it above the liquid surface for maintenance, so as to realize non-drainage maintenance.

[0088] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sewage and wastewater treatment device with an internal circulation fluidized bed having an adjustable aeration height, characterized in that: It comprises an internal circulating fluidized bed body (1), an aeration height adjustment component arranged above the top of the internal circulating fluidized bed body (1), and an air supply pipeline (6) arranged outside the internal circulating fluidized bed body (1); The internal circulating fluidized bed body (1) comprises: An inner guide tube (2) arranged in the inner circulating fluidized bed body (1); A steel guide rail (14) arranged on the inner side of the inner guide cylinder (2); An inner guide tube bracket (3) disposed outside the inner guide tube (2), the inner guide tube bracket (3) being matched with the steel guide rail (14) to support and fix the inner guide tube (2); an aeration pipe (5) disposed in the inner guide tube (2); a plurality of aerators (4) are installed on the aeration pipe (5); An air supply hose (7), which is arranged between the aeration pipe (5) and the air supply pipeline (6) and is used to connect the aeration pipe (5) and the air supply pipeline (6); A steel support (10) disposed at the bottom of the aeration pipe (5) and used to support the aeration pipe (5) and the aerator (4); A limiting steel section (11) is fixed on the steel section support (10) and cooperates with the steel section guide rail (14) to limit the horizontal position of the steel section support (10); A counterweight support (12) is arranged below the steel support (10).

2. The sewage and wastewater treatment device with an internal circulating fluidized bed having an adjustable aeration height according to claim 1, characterized in that: The aeration height adjustment component comprises a cantilever bracket (18), a two-way self-locking hand-cranked winch (17), a movable cantilever (19), a lifting rope (16) and a connecting rope (15). The cantilever bracket (18) is installed above the top of the internal circulating fluidized bed body (1). The movable cantilever (19) is arranged on the cantilever bracket (18). The movable cantilever (19) comprises a vertical arm and a horizontal cantilever. The two-way self-locking hand-cranked winch (17) is arranged on the vertical arm. A pulley is arranged at the right end of the horizontal cantilever. One end of the lifting rope (16) is connected to the two-way self-locking hand-cranked winch (17), and the other end passes through the pulley and is connected to the middle of the connecting rope (15). The connecting rope (15) is connected to the steel bracket (10).

3. The sewage and wastewater treatment device with an internal circulating fluidized bed having adjustable aeration height according to claim 1, characterized in that: The inner draft tube (2) divides the inner circulating fluidized bed body (1) into an ascending zone (20) and a descending zone (21), the area ratio of the ascending zone (20) to the descending zone (21) being 1-1.5:1, the inner draft tube (2) being 0.5-0.8 m high from the bottom of the inner circulating fluidized bed body (1), and being 0.5-0.8 m high from the liquid level in the inner circulating fluidized bed body (1).

4. The sewage and wastewater treatment device with an internal circulating fluidized bed having an adjustable aeration height according to claim 1, characterized in that: It also includes a U-shaped pipe bracket (13), the U-shaped pipe bracket (13) being a steel structure, and the U-shaped pipe bracket (13) being used to fix the aeration pipe (5) to the steel bracket (10).

5. The sewage and wastewater treatment device with an internal circulating fluidized bed having adjustable aeration height according to claim 1, characterized in that: The internal circulating fluidized bed body (1) is a circular tank body or a rectangular tank body, the internal circulating fluidized bed body (1) is a reinforced concrete structure or a steel structure, and the internal guide tube (2) is welded from steel structure plates.

6. The sewage and wastewater treatment device with an internal circulating fluidized bed having adjustable aeration height according to claim 5, characterized in that: The internal circulating fluidized bed body (1) is a circular pool body, and the ratio of the liquid level height in the circular pool body to the pool body diameter is not less than 1.

7. The sewage and wastewater treatment device with an internal circulating fluidized bed having an adjustable aeration height according to claim 5, characterized in that: The internal circulating fluidized bed body (1) is a rectangular pool body, and the ratio of the liquid level height in the rectangular pool body to the pool body width is not less than 1.

8. The sewage and wastewater treatment device with an internal circulating fluidized bed having adjustable aeration height according to claim 1, characterized in that: It also includes a pipe connector (8) for connecting the air supply hose (7) with the air supply pipe (6) and the aeration pipe (5); the connection form of the pipe connector (8) is any one of a flange, a thread, a quick connector, and a pagoda connector.

9. The sewage and wastewater treatment device with an internal circulating fluidized bed having adjustable aeration height according to claim 8, characterized in that: An air supply valve (9) is provided between the air supply pipeline (6) and the pipeline connector (8), and the air supply valve (9) is used to adjust the compressed air delivery volume of the internal circulating fluidized bed.

10. The sewage and wastewater treatment device with an internal circulating fluidized bed having adjustable aeration height according to claim 1, characterized in that: The aeration pipe (5) is made of hard polyvinyl chloride material, the air supply hose (7) is a steel hose or a stainless steel hose, and the air supply pipeline (6) is a galvanized steel pipe or a stainless steel pipe.

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