Multi-stage biological treatment equipment for municipal sewage

Abstract

The invention discloses multi-stage biological treatment equipment for urban sewage, and relates to the technical field of biological sewage treatment.The multi-stage biological treatment equipment comprises a treatment tank and a fine separation mechanism, a partition plate is fixedly connected to the inner wall of the treatment tank in a sealed mode, the fine separation mechanism comprises a separation cylinder fixedly connected to the upper end of the partition plate, and a filter plate is rotatably connected to the inner wall of the separation cylinder in a sealed mode; mounting blocks are fixedly connected to the inner walls of the filter holes of the filter plate, and spline shafts are rotationally connected to the upper ends of the mounting blocks. According to the invention, the impeller is driven by the kinetic energy of the treated water flow so as to drive the aeration mechanism to work, and automatic aeration without an external power source is realized, so that the operation energy consumption is obviously reduced, and more importantly, the mass transfer efficiency of dissolved oxygen can be improved by tiny bubbles generated by aeration; sufficient oxygen is continuously provided for aerobic microorganisms attached to the filter plate and the filler, and the high activity of a biological membrane is ensured, so that the decomposition rate and the removal efficiency of organic pollutants in sewage are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage biological treatment, and particularly relates to a multi-stage biological treatment equipment for municipal sewage. BACKGROUND

[0002] With the acceleration of urbanization, efficient and stable treatment of municipal sewage has become a major challenge in the field of environmental protection. Municipal sewage usually contains a large amount of suspended solids, colloids and complex organic pollutants, and the treatment effect is directly related to the ecological environment safety of the receiving water body.

[0003] At present, the biological treatment method is generally used in the municipal sewage treatment process, and the core is to degrade the organic pollutants in the sewage by using the metabolism of microorganisms. The common biological treatment technology is the biofilm method. The biofilm method is to make microorganisms adhere to the surface of fixed fillers to form a biofilm, which has the advantages of high biomass, strong impact load resistance and less residual sludge. However, the traditional biofilm method still has some problems: the biofilm will age and thicken after long-term operation, which will reduce the activity of the internal microorganisms, and even cause the biofilm to fall off due to blockage, thereby affecting the long-term stable operation of the system; if the solid impurities in the sewage, especially the larger particles, are not effectively removed and directly enter the biological treatment unit, the equipment will be worn and the water distribution and air distribution system will be blocked, and even the effective volume of the biological reactor will be occupied, which will seriously affect the stable growth of microorganisms and the treatment efficiency; in order to realize multi-stage treatment, the traditional process usually needs multiple independent structures in series, which leads to long process flow, large land occupation and high capital investment. SUMMARY

[0004] The purpose of the present application is to solve the problems of poor separation effect of fine and light particles by the existing cyclone separator and lack of biological treatment of organic pollutants, and to provide a multi-stage biological treatment equipment for municipal sewage.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] The multi-stage biological treatment equipment for municipal sewage comprises a treatment tank, and a partition plate is sealingly and fixedly connected to the inner wall of the treatment tank, and further comprises:

[0007] The fine separation mechanism comprises a separation cylinder fixedly connected to the upper end of the partition plate, a filter plate sealingly and rotatably connected to the inner wall of the separation cylinder, a mounting block fixedly connected to the inner wall of the filter hole of the filter plate, a spline shaft rotatably connected to the upper end of the mounting block, an adjusting cylinder penetrating through the lower end of the mounting block and fixedly connected to the lower end of the spline shaft, a plurality of adjusting arc plates rotatably connected to the side wall of the adjusting cylinder, a plurality of arc-shaped grooves corresponding to the adjusting arc plates and provided in the side wall of the adjusting cylinder, a magnetic block sealingly and slidably connected to the inner wall of the arc-shaped groove, an arc-shaped rod fixedly connected to the side wall of the magnetic block, the other end of the arc-shaped rod fixedly connected to the side wall of the adjusting arc plate, and a first spring fixedly connected between the magnetic block and the inner wall of the arc-shaped groove.

[0008] The aeration mechanism comprises two aeration boxes symmetrically fixedly connected to the side walls of the mounting block 6, a plurality of one-way aeration holes are formed in the side walls of the aeration boxes, a sliding plug is sealingly and slidably connected to the inner wall of the aeration box, the aeration box is communicated with the hollow shaft through a one-way air inlet pipe, a sliding block is slidably connected to the inner wall of the aeration box, two connecting rods are fixedly connected to the side wall of the sliding block, and the other ends of the two connecting rods are fixedly connected with the sliding plug.

[0009] A driving mechanism for driving the filter plate to rotate is mounted on the separation cylinder, and a control assembly for controlling the driving mechanism is mounted on the filter plate.

[0010] Preferably, the driving mechanism comprises a hollow shaft rotatably connected to the upper end of the separation cylinder, the lower end of the hollow shaft is fixedly connected with the filter plate, a servo motor is fixedly connected to the top of the processing tank, a fan-shaped gear is fixedly connected to the output end of the servo motor, and a first gear matched with the fan-shaped gear is fixedly connected to the upper end of the hollow shaft.

[0011] Preferably, the control assembly comprises two inflow cavities symmetrically formed in the lower end of the filter plate, a rotating rod is rotatably connected to the inner wall of each inflow cavity, a plurality of impellers are fixedly connected to the side wall of the rotating rod, a flow outlet is formed in the inner wall of the inflow cavity, two assembly cavities are symmetrically formed in the filter plate, one end of the rotating rod extends into the assembly cavity, a rotating speed sensor is mounted on the inner wall of the assembly cavity, and the rotating speed sensor is connected with the servo motor through a PLC control circuit.

[0012] Preferably, a cleaning mechanism is mounted on the mounting block, the cleaning mechanism comprises a spline sleeve rotatably connected to the upper end of the mounting block, the spline sleeve is sleeved on the side wall of the spline shaft, and the spline sleeve penetrates through the mounting block, a second spring is sleeved on the side wall of the spline shaft, the two ends of the second spring are fixedly connected with the lower end of the spline sleeve and the upper end of the adjusting cylinder respectively, a first bevel gear is fixedly connected to the side wall of the spline sleeve in the mounting block, a transmission shaft is rotatably connected to the inner wall of the mounting block, a second bevel gear is fixedly connected to the side wall of the transmission shaft, one end of one of the transmission shafts extends into the other mounting block and is fixedly connected with a second bevel gear, the first bevel gear is meshingly connected with the second bevel gear, two inner cavities are symmetrically formed in the filter plate, one end of each of a plurality of transmission shafts extends into the inner cavity and is fixedly connected with a second gear, and the adjacent two second gears are meshingly connected, a driving wheel is fixedly connected to the side wall of the rotating rod in the assembly cavity, one end of one of the transmission shafts extends into the assembly cavity and is fixedly connected with a driven wheel, and the driving wheel is connected with the driven wheel through a synchronous belt.

[0013] Preferably, an electromagnet is fixedly connected to the inner wall of each arc-shaped groove, a first conductive block and a second conductive block are symmetrically embedded on the upper end of the filter plate, a conductive plate matched with the first conductive block and the second conductive block is embedded in the separation cylinder, and the electromagnet, the first conductive block, the second conductive block, the conductive plate and an external power source are electrically connected through wires.

[0014] Preferably, the cleaning mechanism further comprises a mounting frame fixedly connected to the inner wall of the treatment tank, a reciprocating screw rod rotatably connected to the lower end of the mounting frame, a rectangular block threadedly connected to the side wall of the reciprocating screw rod, a plurality of push rods fixedly connected to the lower end of the rectangular block and corresponding to the spline shaft, a third gear fixedly connected to the side wall of the reciprocating screw rod and matched with the sector gear, and a limiting sleeve fixedly connected to the inner wall of the treatment tank and slidably sleeved on the side wall of two push rods.

[0015] Preferably, the upper end of the partition plate is fixedly connected with a discharging plate, and the side wall of the treatment tank is provided with a discharging port.

[0016] Preferably, the partition plate divides the interior of the treatment tank into a cyclone cavity and a mounting cavity, and the fine separation mechanism, the driving mechanism, the cleaning mechanism and the control assembly are all arranged in the mounting cavity.

[0017] Preferably, the side wall of the treatment tank is fixedly connected with a water inlet pipe, one end of the water inlet pipe is communicated with the cyclone cavity, the lower end of the partition plate is fixedly connected with a cyclone pipe, one end of the cyclone pipe is communicated with the separation cylinder, the upper end of the treatment tank is fixedly connected with an overflow pipe, the lower end of the overflow pipe is communicated with the separation cylinder, and the lower end of the treatment tank is fixedly connected with a discharging pipe.

[0018] Preferably, the aeration mechanism further comprises a reciprocating screw rod rotatably connected to the inner wall of the aeration box, a sliding block threadedly connected to the side wall of the reciprocating screw rod, and a rotating rod fixedly connected to one end of the reciprocating screw rod and penetrating through the side wall of the aeration box.

[0019] The present application has the following beneficial effects:

[0020] 1. By arranging the aeration mechanism, the impeller is driven by the kinetic energy of the treatment water flow, thereby driving the aeration mechanism to work, realizing automatic aeration without external power source, which not only significantly reduces the operation energy consumption, but more importantly, the micro-bubbles generated by aeration can improve the mass transfer efficiency of dissolved oxygen, continuously providing sufficient oxygen for the aerobic microorganisms attached to the filter plate and filler, ensuring the high activity of the biofilm, thereby significantly improving the decomposition rate and removal efficiency of organic pollutants in the sewage.

[0021] 2. The water flow disturbance generated by aeration and the turbulent flow generated by the rotation of the adjusting arc plate jointly act, breaking the stagnation layer near the filter hole and creating a dynamic mixing environment, which greatly promotes the contact frequency and mass transfer efficiency of the organic pollutants in the sewage, dissolved oxygen and the microorganisms on the surface of the biofilm.

[0022] 3、By setting the fine separation mechanism, the coarse particle filtering and fine filtering are integrated, the cyclone cavity removes most of the coarse particles first, reduces the subsequent filtering load, and then the inner cyclone carrying fine particles rises, and the filter plate in the separation cylinder performs secondary fine filtering, adopting multi-stage process of coarse separation and fine filtering, effectively overcoming the defect of insufficient removal of fine particles in traditional cyclone separation, and significantly improving the water quality of the final effluent;

[0023] 4、By setting the cleaning mechanism, the adjusting arc plate automatically rotates under the driving of the water flow to generate strong shearing and disturbance effect inside the filter hole, which can actively break and peel off the solid impurities that are about to block the filter hole, fundamentally changing the passive filtering mode of the traditional filter plate. This dynamic filtering greatly delays the speed of filter hole blockage, ensures the long-term stability of filtering flow and effect, and reduces the maintenance requirements due to blockage;

[0024] 5、By setting the driving mechanism and control assembly, when the filter plate half is blocked, causing the water flow to decrease and the impeller speed to decrease, the filter plate can automatically sense and trigger a 180-degree rotation, switching the blocked side to the outside of the separation cylinder, while cleaning it, realizing uninterrupted filtering process. Subsequently, the device automatically performs mechanical online cleaning of the switched-out blocked part, and the cleaned impurities are automatically collected and discharged. The sensing, switching and cleaning process is fully automatic, realizing continuous unmanned operation, improving processing efficiency, and combining the cleaning process of the filter element with the renewal process of the biofilm. While automatically cleaning the filter plate regularly to prevent blockage, the old and less active part of the biofilm surface is also removed at the same time. This controllable erosion effect can effectively prevent the biofilm from over-thickening, causing anaerobic and mass transfer resistance in the inner layer, continuously exposing the internal high-activity microbial layer, keeping the biofilm always in vigorous metabolic activity, and solving the problem of decreased processing efficiency due to biofilm aging in traditional biofilm method;

[0025] 6、By setting the electromagnet, conductive plate, first conductive block and second conductive block, etc., by changing the current of the electromagnet, the gap between the adjusting arc plate and the inner wall of the filter hole can be adjusted, so as to dynamically adjust the effective filter pore size, so as to flexibly adapt to different water quality or different processing requirements, and expand the application range of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A three-dimensional structure schematic diagram of a multi-stage biological treatment equipment for urban sewage is proposed for the present application;

[0027] Figure 2 For Figure 1 A sectional view structure schematic diagram of the middle treatment tank;

[0028] Figure 3 For Figure 2 A sectional view structure schematic diagram of the middle partition plate and the separation cylinder;

[0029] Figure 4 For Figure 3 The schematic diagram of horizontal section structure of filter plate;

[0030] Figure 5 For Figure 3 The schematic diagram of section structure of installation block and adjusting cylinder;

[0031] Figure 6 For Figure 3 The enlarged schematic diagram of structure at A in

[0032] Figure 7 For Figure 3 The enlarged schematic diagram of structure at B in

[0033] Figure 8 For Figure 3 The enlarged schematic diagram of structure at C in

[0034] Figure 9 For Figure 5 The enlarged schematic diagram of structure at D in

[0035] In the figure: 1, treatment tank; 2, partition plate; 201, cyclone cavity; 202, installation cavity; 3, separation cylinder; 4, hollow shaft; 5, filter plate; 6, installation block; 7, spline shaft; 8, adjusting cylinder; 9, adjusting arc plate; 10, arc-shaped slot; 11, magnetic block; 12, arc-shaped rod; 13, first spring; 14, electromagnet; 15, servo motor; 16, sector gear; 17, first gear; 18, inflow cavity; 19, rotating rod; 20, impeller; 21, outflow port; 22, rotating speed sensor; 23, spline sleeve; 24, first bevel gear; 25, transmission shaft; 26, second bevel gear; 27, second spring; 28, inner cavity; 29, second gear; 30, assembly cavity; 31, driving wheel; 32, driven wheel; 33, first conductive block; 34, second conductive block; 35, conductive plate; 36, mounting frame; 37, reciprocating screw; 38, rectangular block; 39, push rod; 40, third gear; 41, limiting sleeve; 42, discharge plate; 43, discharge port; 44, water inlet pipe; 45, cyclone pipe; 46, overflow pipe; 47, impurity discharge pipe; 48, aeration tank; 49, one-way aeration hole; 50, sliding plug; 51, one-way air inlet pipe; 52, sliding block; 53, connecting rod; 54, reciprocating screw. DETAILED DESCRIPTION

[0036] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited to the specific implementation disclosed below.

[0037] With reference to Figures 1-9 A multi-stage biological treatment device for municipal sewage, comprising a treatment tank 1, a partition plate 2 fixedly and sealingly connected to the inner wall of the treatment tank 1, the partition plate 2 dividing the inside of the treatment tank 1 into a cyclone cavity 201 and a mounting cavity 202, further comprising:

[0038] A fine separation mechanism, comprising a separation cylinder 3 fixedly connected to the upper end of the partition plate 2, a filter plate 5 sealingly and rotatably connected to the inner wall of the separation cylinder 3, a mounting block 6 fixedly connected to the inner wall of the filter hole of the filter plate 5, a spline shaft 7 rotatably connected to the upper end of the mounting block 6, an adjusting cylinder 8 fixedly connected to the lower end of the mounting block 6, a plurality of adjusting arc plates 9 rotatably connected to the side wall of the adjusting cylinder 8, a plurality of arc-shaped grooves 10 corresponding to the adjusting arc plates 9 provided in the side wall of the adjusting cylinder 8, a magnetic block 11 sealingly and slidably connected to the inner wall of the arc-shaped groove 10, an arc-shaped rod 12 fixedly connected to the side wall of the magnetic block 11, the other end of the arc-shaped rod 12 fixedly connected to the side wall of the adjusting arc plate 9, and a first spring 13 fixedly connected between the magnetic block 11 and the inner wall of the arc-shaped groove 10;

[0039] An aeration mechanism, comprising two aeration boxes 48 fixedly and symmetrically connected to the side wall of the mounting block 6, a plurality of one-way aeration holes 49 provided in the side wall of the aeration box 48, the one-way aeration holes 49 allowing air in the aeration box 48 to be discharged only, a sliding plug 50 sealingly and slidably connected to the inner wall of the aeration box 48, the aeration box 48 communicating with the hollow shaft 4 through a one-way air inlet pipe 51, a sliding block 52 slidably connected to the inner wall of the aeration box 48, two connecting rods 53 fixedly connected to the side wall of the sliding block 52, and the other ends of the two connecting rods 53 fixedly connected to the sliding plug 50;

[0040] A water inlet pipe 44 fixedly connected to the side wall of the treatment tank 1, the other end of the water inlet pipe 44 connectable to an external pump body, water flow being pumped into the water inlet pipe 44 by the external pump body, one end of the water inlet pipe 44 communicating with the cyclone cavity 201, a cyclone pipe 45 fixedly connected to the lower end of the partition plate 2, one end of the cyclone pipe 45 communicating with the separation cylinder 3, an overflow pipe 46 fixedly connected to the upper end of the treatment tank 1, the lower end of the overflow pipe 46 communicating with the separation cylinder 3, and a foreign matter discharge pipe 47 fixedly connected to the lower end of the treatment tank 1;

[0041] Further, one end of the water inlet pipe 44 is connected with the external pump body, and the fine biological suspended filler is added into the sewage in advance, and then the external pump body pumps the municipal sewage and the biological suspended filler into the cyclone cavity 201 of the treatment tank 1 through the water inlet pipe 44, at this time, the water flow enters the cyclone cavity 201 tangentially and rotates at high speed along the inner wall of the treatment tank 1, so as to form a strong outer vortex, the water flow rotates downward to the bottom of the treatment tank 1, in this downward and outward vortex, the heavy particles in the sewage are thrown to the inner wall of the treatment tank 1 due to the huge centrifugal force, and they lose kinetic energy after impacting the inner wall of the treatment tank 1 and spiral downward along the inner wall of the treatment tank 1 under the action of gravity, and finally are discharged from the impurity discharge pipe 47, so as to preliminarily separate the heavy particles contained in the municipal drainage.

[0042] It is worth mentioning that when the water flow approaches the bottom of the treatment tank 1, due to the limitation of the diameter of the channel at the bottom of the treatment tank 1 and the continuity of the fluid, the remaining water flow changes direction to form an upward inner vortex, and this upward inner vortex mainly carries the fine particles that cannot overcome the fluid drag force by the centrifugal force, upward through the cyclone pipe 45 and the separation cylinder 3, and then is discharged from the overflow pipe 46, and when the water flow flows through the separation cylinder 3, the filter plate 5 filters and removes the fine particles in the water flow, so as to further separate the solid and liquid in the sewage, compared with the existing cyclone separator, the separation of fine solid impurities is increased, and the separation effect is improved.

[0043] Further, the fine biological suspended filler also enters the separation cylinder 3, and then forms a biological membrane on the surface of the filter plate 5 and in the filter hole thereof, and then the organic pollutants in the sewage are decomposed by the microorganisms in the biological membrane, so as to biologically treat the organic pollutants in the sewage and ensure the discharge standard of the sewage.

[0044] The separation cylinder 3 is provided with a driving mechanism for driving the filter plate 5 to rotate, and the filter plate 5 is provided with a control assembly for controlling the driving mechanism.

[0045] The driving mechanism comprises a hollow shaft 4 rotatably connected to the upper end of the separation cylinder 3, the lower end of the hollow shaft 4 is fixedly connected with the filter plate 5, a servo motor 15 is fixedly connected to the top of the treatment tank 1, a sector gear 16 is fixedly connected to the output end of the servo motor 15, a first gear 17 matched with the sector gear 16 is fixedly connected to the upper end of the hollow shaft 4, and the transmission ratio of the sector gear 16 and the first gear 17 is set, so that the first gear 17 can rotate by 180 degrees during the meshing of the sector gear 16 and the first gear 17.

[0046] The control assembly comprises two inflow cavities 18 symmetrically formed in the lower end of the filter plate 5, a rotating rod 19 rotatably connected to the inner wall of each inflow cavity 18, a plurality of impellers 20 fixedly connected to the side wall of the rotating rod 19, a discharge port 21 formed in the inner wall of the inflow cavity 18, two assembly cavities 30 symmetrically formed in the filter plate 5, the rotating rod 19 extending into the assembly cavity 30, a rotating speed sensor 22 mounted on the inner wall of the assembly cavity 30, and the rotating speed sensor 22 connected to the servo motor 15 through a PLC control circuit.

[0047] The aeration mechanism further comprises a reciprocating screw rod 54 rotatably connected to the inner wall of the aeration tank 48, the side wall of the reciprocating screw rod 54 being threadedly connected to the sliding block 52, and one end of the reciprocating screw rod 54 penetrating through the side wall of the aeration tank 48 and being fixedly connected to the rotating rod 19.

[0048] Further, the rotating of the rotating rod 19 drives the reciprocating screw rod 54 to rotate, thereby driving the sliding block 52 to reciprocate in the aeration tank 48, and the sliding block 52 drives the sliding plug 50 to reciprocate and seal through the connecting rod 53. At this time, under the action of the sliding plug 50, external air is drawn into the aeration tank 48 through the hollow shaft 4 and the one-way air inlet pipe 51, and then the air is sprayed out through a plurality of one-way aeration holes 49 to aerate the sewage in the separation cylinder 3. On the one hand, aeration can increase the oxygen content in the sewage, provide sufficient oxygen for the microbial decomposition of organic pollutants, and promote the biological treatment of organic pollutants. On the other hand, the bubbles generated by aeration can play a role in flow disturbance, promoting water flow movement, thereby facilitating the contact between microorganisms and organic pollutants, and improving the biological treatment effect.

[0049] The mounting block 6 is provided with a cleaning mechanism, which comprises a spline sleeve 23 rotatably connected to the upper end of the mounting block 6, the spline sleeve 23 being sleeved on the side wall of the spline shaft 7 and penetrating through the mounting block 6, the side wall of the spline shaft 7 being sleeved with a second spring 27, the two ends of the second spring 27 being fixedly connected to the lower end of the spline sleeve 23 and the upper end of the adjusting cylinder 8 respectively, the side wall of the spline sleeve 23 located in the mounting block 6 being fixedly connected with a first bevel gear 24, the inner wall of the mounting block 6 being rotatably connected with a transmission shaft 25, the side wall of the transmission shaft 25 being fixedly connected with a second bevel gear 26, one end of one of the transmission shafts 25 extending into the other mounting block 6 and being fixedly connected with a second bevel gear 26, the first bevel gear 24 being meshingly connected with the second bevel gear 26, two inner cavities 28 being symmetrically formed in the filter plate 5, one end of a plurality of transmission shafts 25 extending into the inner cavities 28 and being fixedly connected with second gears 29, and the adjacent two second gears 29 being meshingly connected, the side wall of the rotating rod 19 located in the assembly cavity 30 being fixedly connected with a driving wheel 31, one end of one of the transmission shafts 25 extending into the assembly cavity 30 and being fixedly connected with a driven wheel 32, and the driving wheel 31 being connected with the driven wheel 32 through a synchronous belt.

[0050] Further, when the filter plate 5 filters the fine particles, part of the water flow in the cyclone cavity 201 will enter the flow cavity 18 and impact the impeller 20 when the water flow enters the separation cylinder 3 through the cyclone pipe 45, Rotating the impeller 20, thereby rotating the rotating rod 19, rotating the driving wheel 31, thereby rotating the driven wheel 32, rotating the transmission shaft 25, which will Rotating the other second gears 29 through the second gear 29, thereby rotating all the transmission shafts 25, which will Rotating the first bevel gear 24 through the second bevel gear 26, thereby rotating the spline sleeve 23, which will rotate the spline shaft 7, rotating the adjusting cylinder 8, thereby rotating the plurality of adjusting arc plates 9, the rotation of the adjusting arc plates 9 can destroy the stable laminar boundary layer at the filter hole inlet, generating strong turbulence and disturbance, which makes it difficult for solid particles to stably adhere to the hole wall of the filter hole, and the conical design of the adjusting arc plate 9 can guide the solid particles from the narrow hole to the wider internal space, cooperating with the centrifugal force, throwing the solid particles into the water flow below, thereby preventing the solid particles from blocking the filter holes of the filter plate 5 to a certain extent, ensuring the filtering effect. ​ ​ ​ ​ ​ ​

[0051] The inner wall of each arc-shaped groove 10 is fixedly connected with an electromagnet 14, the upper end of the filter plate 5 is symmetrically embedded with a first conductive block 33 and a second conductive block 34, and the separation cylinder 3 is embedded with a conductive plate 35 matched with the first conductive block 33 and the second conductive block 34, and the electromagnet 14, the first conductive block 33, the second conductive block 34, the conductive plate 35 and the external power source are electrically connected through wires.

[0052] Further, by controlling the current flowing into the electromagnet 14, the electromagnet 14 can generate magnetic fields of different strengths, thereby changing the magnetic attraction of the electromagnet 14 to the magnetic block 11. The smaller the current flowing into the electromagnet 14, the smaller the magnetic attraction of the electromagnet 14 to the magnetic block 11, and the magnetic block 11 will be closer to the outer side of the arc-shaped groove 10 under the action of the first spring 13, and the magnetic block 11 will drive the adjusting arc plate 9 to rotate towards the filter hole inner wall of the filter plate 5 through the arc-shaped rod 12, so that the adjusting arc plate 9 is closer to the filter hole inner wall of the filter plate 5, and the filter hole aperture of the filter plate 5 is smaller, so that finer solid particle impurities can be filtered. Therefore, according to the actual filtering requirements, the filter hole aperture of the filter plate 5 is adjusted, which is convenient for filtering solid particle impurities of different sizes, and the adaptation range is wider.

[0053] It is worth mentioning that, with the increase of filtration time, the more and more solid impurities intercepted below the filter plate 5 will continuously flow into the filter hole, and the filter hole will be gradually blocked. With the filter hole being blocked more and more seriously, the water flow into the separation cylinder 3 will be reduced, and then the rotating speed of the impeller 20 will gradually decrease when the water flow impacts the impeller 20. When the rotating speed of the impeller 20 decreases to a certain extent, it indicates that the filter hole of the filter plate 5 has been seriously blocked at this time. When the rotating speed sensor 22 senses that the rotating speed of the rotating rod 19 decreases to a certain extent, it will send a signal. The rotating speed sensor 22 will control the servo motor 15 to drive the sector gear 16 to rotate one circle through the PLC control circuit. When the sector gear 16 rotates to engage with the first gear 17, it will drive the first gear 17 to rotate, thereby driving the hollow shaft 4 to rotate and driving the filter plate 5 to rotate. When the sector gear 16 rotates to disengage from the first gear 17, the hollow shaft 4 will stop rotating. During the engagement of the sector gear 16 and the first gear 17, the first gear 17 can be driven to rotate 180 degrees, thereby driving the filter plate 5 to rotate 180 degrees. At this time, the blocked half of the filter plate 5 will rotate to the outside of the separation cylinder 3, and the other clean half will rotate to the inside of the separation cylinder 3 to continue filtering. Therefore, when the filter hole is blocked, the filter plate 5 will be automatically switched to the other half to enter the separation cylinder 3, so that the filtering work is uninterrupted, and manual monitoring of the use of the filter plate 5 and replacement of the filter plate 5 are not required.

[0054] The cleaning mechanism further comprises a mounting frame 36 fixedly connected to the inner wall of the treatment tank 1, a reciprocating screw rod 37 rotatably connected to the lower end of the mounting frame 36, a rectangular block 38 threadedly connected to the side wall of the reciprocating screw rod 37, a plurality of push rods 39 fixedly connected to the lower end of the rectangular block 38 and corresponding to the spline shaft 7, a third gear 40 fixedly connected to the side wall of the reciprocating screw rod 37 and matched with the sector gear 16. By setting the transmission ratio between the sector gear 16 and the third gear 40, the third gear 40 drives the reciprocating screw rod 37 to rotate during the engagement of the sector gear 16 and the third gear 40, so that the rectangular block 38 reciprocates up and down one round trip. The treatment tank 1 has a limiting sleeve 41 fixedly connected to the inner wall thereof, and the limiting sleeve 41 is slidably sleeved on the side wall of two push rods 39.

[0055] The separation plate 2 has a discharge plate 42 fixedly connected to the upper end thereof, and the treatment tank 1 has a discharge port 43 formed in the side wall thereof.

[0056] Further, when the blocked half filter plate 5 is rotated to the outside of the separation cylinder 3, with the continuous rotation of the sector gear 16, the sector gear 16 will rotate to engage with the third gear 40, thereby driving the third gear 40 to rotate, driving the reciprocating lead screw 37 to rotate, thereby driving the rectangular block 38 to move downward, driving the plurality of push rods 39 to move downward, the plurality of push rods 39 will push the plurality of spline shafts 7 to slide downward, thereby driving the adjusting cylinder 8 and the plurality of adjusting arc plates 9 to move downward, since the first conductive block 33 no longer contacts the conductive plate 35 after the filter plate 5 is rotated by 180 degrees at this time, the electromagnet 14 located outside the separation cylinder 3 will be de-energized and lose magnetism, and then the adjusting arc plate 9 will be in contact with the inner wall of the filter hole on the filter plate 5 under the action of the first spring 13, and when the adjusting cylinder 8 and the adjusting arc plate 9 move downward, the solid impurities attached to the inner wall of the filter hole will be pushed out, and at this time, since the impeller 20 located in the separation cylinder 3 will rotate under the impact of the water flow, it will drive all the adjusting cylinders 8 and the adjusting arc plates 9 to rotate, so the adjusting arc plate 9 will rotate synchronously while moving downward, and the rotating adjusting arc plate 9 will generate a shearing force to break and destroy the stable structure of the solid impurities attached to the inner wall of the filter hole, thereby improving the cleaning effect of the filter hole, and when the filter plate 5 is cleaned, the outermost layer of the biofilm on the surface and in the filter hole of the filter plate 5 will also be cleaned, thereby removing the aging layer of the biofilm and ensuring that the core bacteria group inside can contact organic pollutants, thereby improving the biological treatment efficiency, and after the solid impurities are pushed out of the filter hole and fall onto the discharge plate 42, they will roll down to the discharge port 43, and then be discharged through the discharge port 43, and since the one-way aeration hole 49 is arranged in a downward inclined direction, when discharging, the one-way aeration hole 49 will blow the impurities on the discharge plate 42 toward the discharge port 43, facilitating efficient impurity discharge, and when the adjusting cylinder 8 moves to the lowermost end, the rectangular block 38 will move in the opposite direction to reset, thereby driving the push rod 39 to move in the opposite direction to reset, at this time, the adjusting cylinder 8 will move upward under the action of the second spring 27 to reset and re-enter the filter hole, and then the sector gear 16 will disengage from the third gear 40, and the servo motor 15 will stop rotating.

[0057] The fine separation mechanism, the driving mechanism, the cleaning mechanism, and the control assembly are all arranged in the installation cavity 202.

[0058] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes within the technical scope disclosed by the present application according to the technical solution and inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A multi-stage biological treatment device for urban sewage, comprising a treatment tank (1), wherein a partition plate (2) is fixedly and sealed to the inner wall of the treatment tank (1), characterized in that, Also includes: The fine separation mechanism includes a separation cylinder (3) fixedly connected to the upper end of the partition plate (2). A filter plate (5) is rotatably connected to the inner wall of the separation cylinder (3). An installation block (6) is fixedly connected to the inner wall of the filter hole of the filter plate (5). A spline shaft (7) is rotatably connected to the upper end of the installation block (6). An adjusting cylinder (8) is fixedly connected to the lower end of the spline shaft (7) through the lower end of the installation block (6). A plurality of adjusting arc plates (9) are rotatably connected to the side wall of the adjusting cylinder (8). A plurality of arc grooves (10) corresponding to the adjusting arc plates (9) are opened on the side wall of the adjusting cylinder (8). A magnetic block (11) is slidably connected to the inner wall of the arc groove (10). An arc rod (12) is fixedly connected to the side wall of the magnetic block (11). The other end of the arc rod (12) is fixedly connected to the side wall of the adjusting arc plate (9). A first spring (13) is fixedly connected between the magnetic block (11) and the inner wall of the arc groove (10). An aeration mechanism includes two aeration boxes (48) symmetrically fixedly connected to the side wall of the mounting block (6). The side wall of the aeration box (48) is provided with a plurality of one-way aeration holes (49). The inner wall of the aeration box (48) is sealed and slidably connected with a sliding plug (50). The aeration box (48) is connected to the hollow shaft (4) through a one-way air inlet pipe (51). The inner wall of the aeration box (48) is slidably connected with a slider (52). The side wall of the slider (52) is fixedly connected with two connecting rods (53). The other end of the two connecting rods (53) is fixedly connected to the sliding plug (50). The separation cylinder (3) is equipped with a drive mechanism for rotating the filter plate (5), and the filter plate (5) is equipped with a control component for controlling the drive mechanism.

2. The multi-stage biological treatment equipment for urban sewage according to claim 1, characterized in that: The driving mechanism includes a hollow shaft (4) rotatably connected to the upper end of the separation cylinder (3), the lower end of the hollow shaft (4) being fixedly connected to the filter plate (5), a servo motor (15) being fixedly connected to the top of the processing tank (1), a sector gear (16) being fixedly connected to the output end of the servo motor (15), and a first gear (17) cooperating with the sector gear (16) being fixedly connected to the upper end of the hollow shaft (4).

3. The multi-stage biological treatment equipment for urban sewage according to claim 2, characterized in that: The control component includes two inlet chambers (18) symmetrically opened at the lower end of the filter plate (5). Each inlet chamber (18) has a rotating rod (19) rotatably connected to its inner wall. Multiple impellers (20) are fixedly connected to the side wall of the rotating rod (19). An outlet (21) is opened on the inner wall of the inlet chamber (18). Two assembly chambers (30) are symmetrically opened in the filter plate (5). One end of the rotating rod (19) extends into the assembly chamber (30). A speed sensor (22) is installed on the inner wall of the assembly chamber (30). The speed sensor (22) is connected to the servo motor (15) through a PLC control circuit.

4. A multi-stage biological treatment device for urban sewage according to claim 3, characterized in that: A cleaning mechanism is installed on the mounting block (6). The cleaning mechanism includes a spline sleeve (23) rotatably connected to the upper end of the mounting block (6). The spline sleeve (23) is fitted onto the side wall of the spline shaft (7) and passes through the mounting block (6). A second spring (27) is fitted onto the side wall of the spline shaft (7). The two ends of the second spring (27) are fixedly connected to the lower end of the spline sleeve (23) and the upper end of the adjusting cylinder (8), respectively. A first bevel gear (24) is fixedly connected to the side wall of the spline sleeve (23) inside the mounting block (6). A drive shaft (25) is rotatably connected to the inner wall of the mounting block (6). A second bevel gear (26) is fixedly connected to the side wall of the drive shaft (25). One of the bevel gears located in one axial row is... One end of the drive shaft (25) extends into another mounting block (6) and is fixedly connected to a second bevel gear (26). The first bevel gear (24) meshes with the second bevel gear (26). Two inner cavities (28) are symmetrically opened in the filter plate (5). One end of multiple drive shafts (25) extends into the inner cavity (28) and is fixedly connected to a second gear (29). Two adjacent second gears (29) mesh with each other. The rotating rod (19) is located on the side wall of the assembly cavity (30) and is fixedly connected to a drive wheel (31). One end of one drive shaft (25) extends into the assembly cavity (30) and is fixedly connected to a driven wheel (32). The drive wheel (31) is connected to the driven wheel (32) through a synchronous belt.

5. A multi-stage biological treatment device for urban sewage according to claim 1, characterized in that: Each of the arc-shaped grooves (10) is fixedly connected to an electromagnet (14) on its inner wall. The filter plate (5) is symmetrically embedded with a first conductive block (33) and a second conductive block (34) on its upper end. The separation cylinder (3) is embedded with a conductive plate (35) that cooperates with the first conductive block (33) and the second conductive block (34). The electromagnet (14), the first conductive block (33), the second conductive block (34), the conductive plate (35) and the external power supply are electrically connected by wires.

6. A multi-stage biological treatment device for urban sewage according to claim 4, characterized in that: The cleaning mechanism also includes a mounting bracket (36) fixedly connected to the inner wall of the treatment tank (1). The lower end of the mounting bracket (36) is rotatably connected to a reciprocating screw (37). The side wall of the reciprocating screw (37) is threaded with a rectangular block (38). The lower end of the rectangular block (38) is fixedly connected to a plurality of push rods (39) corresponding one-to-one with the spline shaft (7). The side wall of the reciprocating screw (37) is fixedly connected to a third gear (40) that cooperates with the sector gear (16). The inner wall of the treatment tank (1) is fixedly connected to a limiting sleeve (41), and the limiting sleeve (41) is slidably sleeved on the side wall of two of the push rods (39).

7. A multi-stage biological treatment device for urban sewage according to claim 1, characterized in that: The upper end of the partition plate (2) is fixedly connected to the discharge plate (42), and the side wall of the processing tank (1) is provided with a discharge port (43).

8. A multi-stage biological treatment device for urban sewage according to claim 6, characterized in that: The partition plate (2) divides the interior of the processing tank (1) into two parts: a swirling chamber (201) and an installation chamber (202). The fine separation mechanism, the driving mechanism, the cleaning mechanism, and the control components are all located in the installation chamber (202).

9. A multi-stage biological treatment device for urban sewage according to claim 8, characterized in that: The treatment tank (1) is fixedly connected to a water inlet pipe (44), one end of which is connected to a vortex chamber (201). The lower end of the partition plate (2) is fixedly connected to a vortex tube (45), one end of which is connected to a separation cylinder (3). The upper end of the treatment tank (1) is fixedly connected to an overflow pipe (46), the lower end of which is connected to a separation cylinder (3). The lower end of the treatment tank (1) is fixedly connected to a waste discharge pipe (47).

10. A multi-stage biological treatment device for urban sewage according to claim 3, characterized in that: The aeration mechanism also includes a reciprocating screw (54) rotatably connected to the inner wall of the aeration box (48). The side wall of the reciprocating screw (54) is threadedly connected to the slider (52), and one end of the reciprocating screw (54) passes through the side wall of the aeration box (48) and is fixedly connected to the rotating rod (19).

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