Biological membrane reaction type pharmaceutical wastewater treatment device

Abstract

The invention relates to the technical field of wastewater treatment, and discloses a biological membrane reaction type pharmaceutical wastewater treatment device which comprises a biological fluidization pool and a suspension ball body, a biological membrane filler frame is arranged in the suspension ball body, and the suspension ball body is put into the biological fluidization pool and suspended in sewage in the biological fluidization pool. A balancing weight is embedded in the suspension ball body and used for changing the lower portion of the gravity center position of the suspension ball body. According to the invention, the counterweight is additionally arranged in the traditional suspension ball body, so that the suspension ball body can keep a stable posture under the dual action of aeration water flow and fluidization water flow, and the early-stage biofilm culturing efficiency can be effectively improved; the balancing weight is matched with the electromagnet to intermittently supply power, and the working time node of the electromagnet is controlled to increase the filler gap, reduce the accumulation rate of the suspension ball body and remove the aged biological membrane.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a biofilm reaction type pharmaceutical wastewater treatment device. Background Art

[0002] The "three wastes" generated by the pharmaceutical process include wastewater, waste gas and waste residue. Among them, the wastewater contains a large amount of organic matter, which generally needs to be efficiently degraded through microbial oxidation treatment to meet emission standards.

[0003] The biofilm method is to supply organic matter, N, P, C and other nutrients, and under aeration and oxygen supply, make microorganisms attach and grow on the surface of the filler (a carrier that supports the growth and aggregation of microorganisms), thereby forming a biofilm on the surface of the filler. As time goes by, the biofilm gradually thickens, and the biofilm in the inner layer produces an anaerobic film due to lack of oxygen, while the biofilm in the outer layer is fully in contact with oxygen in the water and continues to grow. However, with the increase of anaerobic metabolic products and the continuous escape of gaseous products, the biofilm's ability to adhere to the filler is weakened, which is called an aged biofilm, and its purification ability is poor and it is easy to fall off.

[0004] The biofilm method is divided into fixed biological contact oxidation method and moving bed biofilm reactor according to the installation method of the filler. Among them, the moving bed biofilm reactor (MBBR) adds a certain amount of suspended carrier filler to the filter tank to make microorganisms grow and form biofilms. The suspended carrier filler is in a fluidized state in the filter tank under the action of aeration and water flow, so that it can fully contact with the wastewater for oxidation and decomposition.

[0005] The aforementioned suspended carrier fillers are mostly hollow mesh spheres made of polypropylene material, with elastic fillers, ceramsite filter materials, activated carbon and other inner cores placed inside, floating on the surface of sewage. Due to the lightness of the suspended ball fillers themselves, they frequently flip and flow under the impact of aeration in the filter tank. The frequent shaking of the inner core under its flipping is not conducive to the stable biofilm formation of microorganisms, and the suspended balls are easy to accumulate at the corners of the water outlet and the filter tank, which is not conducive to sufficient contact reaction. Summary of the invention

[0006] In response to the shortcomings of suspended ball fillers used in existing moving bed biofilm reactors mentioned in the background technology, the present invention provides a biofilm reaction type pharmaceutical wastewater treatment device, which enables the suspended balls to maintain a stable posture and improves the early biofilm hanging efficiency. It has the advantages of increasing the filler gap, reducing the accumulation rate of suspended balls, and removing aged biofilms, thereby solving the above-mentioned background technology problems.

[0007] The present invention provides the following technical solution: a biofilm reaction type pharmaceutical wastewater treatment device, comprising a biological fluidized bed and a suspended ball body, wherein the suspended ball body is loaded with a biofilm filler rack, and the suspended ball body is put into the biological fluidized bed and suspended in the sewage in the biological fluidized bed, and a counterweight is embedded in the suspended ball body, and the counterweight is used to change the center of gravity position of the suspended ball body to the lower part.

[0008] Preferably, a slide cylinder is fixedly sleeved at the central axis of the suspension ball body, the slide cylinder is hollow cylindrical and sealed at both ends, and the counterweight block slides in the slide cylinder.

[0009] Preferably, an electromagnet is installed near the surface of the sewage in the biological fluidization tank, and the counterweight is a ferromagnetic object. When the electromagnet is energized, it generates attraction for the counterweight, and when the electromagnet is de-energized, it releases the counterweight.

[0010] Preferably, a spring is sleeved outside the electromagnet, and the length of the spring in a static state is greater than the length of the electromagnet.

[0011] Preferably, the electromagnet starts to flip the suspension ball body regularly to increase the filler gap after the biofilm matures and runs stably; starts to change the accumulation state when the accumulation rate of the suspension ball body is high; and starts at a high frequency after the water treatment is completed to remove the aged biofilm.

[0012] Preferably, the guide vanes are arranged in a circular array outside the suspension ball body, and the guide vanes are arranged obliquely compared to the generatrix of the suspension ball body.

[0013] Preferably, the limiting pressure rings are fixedly sleeved on the outside of the slide tube and at both ends, and the distance between the two limiting pressure rings is adapted to the inner diameter of the suspension ball body after the ball body is assembled.

[0014] Preferably, the end sealing body of the slide cylinder is changed to an increased-body sealing cover, and the increased-body sealing cover is a hollow body to increase the volume after being immersed in water.

[0015] The present invention has the following beneficial effects:

[0016] 1. The present invention adds a counterweight block to the traditional suspension ball body, so that the suspension ball body can maintain a stable posture under the dual effects of aeration water flow and fluidization water flow, reduce its own flipping frequency, and effectively improve the early biofilm efficiency. After the biofilm is completed and the biofilm matures and grows, the sliding counterweight block can redistribute the center of gravity after the suspension ball body flips, improve the posture stability after flipping, and help the biofilm contact oxidation reaction.

[0017] 2. The present invention sets up an electromagnet near the sewage surface, cooperates with a counterweight block made of ferromagnetic material, and controls the working time nodes of the electromagnet to increase the filler gap, reduce the accumulation rate of the suspended ball body, and remove the aged biofilm.

[0018] 3. The present invention arranges guide vanes on the outside of the suspension ball body, so that after the suspension ball body is stabilized under the counterweight of the counterweight block, the vertical water flow of the aeration at the bottom of the pool drives the suspension ball body to rotate, thereby improving the filler in the suspension ball body to fully contact the sewage, obtain sufficient oxygen, inhibit the growth rate of anaerobic bacteria, and thus slow down the formation of the anaerobic layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic top view of the structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 Front view of the section at AA;

[0021] Figure 3 It is a front view of the suspension ball body of the present invention;

[0022] Figure 4 For the present invention Figure 3 A top view of

[0023] Figure 5 It is a front view of the internal structure of the slide tube of the present invention;

[0024] Figure 6 For the present invention Figure 2 A schematic diagram of the structure at B in FIG.

[0025] Figure 7 This is a schematic diagram of the state in which the suspension ball body of the present invention is normally suspended close to the electromagnet;

[0026] Figure 8 It is a schematic diagram of the state of the suspension ball body of the present invention after being adsorbed by the electromagnet;

[0027] Fig. 9 The present invention is based on Figure 3 Front view with guide vanes installed.

[0028] In the figure: 1. biological fluidized bed; 2. water inlet pipe; 3. water outlet pipe; 4. diversion wall; 5. guide plate; 6. power fan blade; 7. material retaining net; 8. electromagnet; 9. spring; 10. suspension ball body; 11. slide cylinder; 12. sealing cover; 13. limit pressure ring; 14. counterweight block; 15. guide vane; 16. augmented body sealing cover. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] For example, see Figure 1 and Figure 2 A biofilm reaction type pharmaceutical wastewater treatment device comprises a biological fluidized bed 1, an inlet pipe 2, an outlet pipe 3, a diversion wall 4, a guide plate 5 and a power fan 6. The biological fluidized bed 1 is a biofilm reactor, and biological contact oxidation occurs in this bed. An inlet pipe 2 is provided at the bottom of one end of the biological fluidized bed 1, which is used to discharge the sewage pre-treated by grid filtration into the biological fluidized bed 1. An outlet pipe 3 is provided at the upper part of one side of the biological fluidized bed 1, which is used to discharge the sewage after the biofilm reaction and enter the secondary sedimentation tank for sedimentation. A diversion wall 4 is provided along the length direction of the inner bottom of the biological fluidized bed 1, and the diversion wall 4 is used to discharge the biological fluidized bed The water flow in the pool 1 is divided into two waterways, so that a circulation can be formed in the biological fluidized pool 1. Guide plates 5 are provided at both ends of the bottom of the biological fluidized pool 1. The guide plates 5 are used to form a reversing flow in the biological fluidized pool 1 to reduce the generation of local vortices. Power blades 6 are provided at both ends of the bottom of the biological fluidized pool 1 and on both sides of the diversion wall 4. The drainage direction of the power blades 6 close to the water inlet pipe 2 is consistent with the water inlet pipe 2, and the drainage direction of the power blades 6 close to the water outlet pipe 3 is opposite to the previous power blades 6. Aeration pipes are provided on both sides of the diversion wall 4. The aeration pipes are used to inject oxygen into the biological fluidized pool 1. Thus, sewage is discharged from the water inlet pipe 2, and a circulation is formed under the promotion of the power blades 6. After the oxidation cycle reaction in the pool is completed, it is discharged from the water outlet pipe 3 to enter the next treatment process.

[0031] See also Figure 3 , Figure 4 and Figure 5, and also includes a suspension ball body 10, which is made of a lightweight material that is acid- and alkali-resistant, aging-resistant, hydrophilic, UV-resistant, and chemically-resistant, and can be suspended on the upper part of the sewage, such as polypropylene PP full plastic material, polyurethane, etc. The suspension ball body 10 is a mesh hollow sphere, which can be divided into two symmetrical hemispheres. The upper and lower ends of the suspension ball body 10 are provided with circular through holes. The internal axis of the suspension ball body 10 is movably sleeved with a slide cylinder 11, which passes through two circular through holes. The threaded sealing sleeves at both ends of the slide cylinder 11 are connected with sealing covers 12. The interior of the slide cylinder 11 is cylindrical and hollow. A counterweight 14 can be slidably provided inside the slide cylinder 11. The sealing cover 12 is used to seal the counterweight 14 in the slide cylinder 11 and prevent sewage from entering the hollow part of the slide cylinder 11. By inserting the slide cylinder 11 into the suspension ball bodies 10 of the two hemispheres and then tightening the upper and lower sealing covers 12, the suspension ball bodies 10 of the two hemispheres are combined into a complete sphere. Before screwing together, the counterweight 14 is slid into the slide cylinder 11, and the filler core is filled into the suspension ball body 10, thereby completing the assembly of the suspension ball filler.

[0032] By setting the counterweight 14, the suspension ball body 10 can be stabilized when suspended in sewage, and the impact of aeration and water flow will not cause the suspension ball body 10 to swing too much or even flip, so that the biofilm can be stabilized and prevented from falling off prematurely. And through the slidable counterweight 14, when the biofilm growth thickness reaches the peak, the impact of aeration impact is significant, which may cause the suspension ball to flip and re-change the center of gravity position, so that the center of gravity of the suspended ball after flipping is lower, which will reduce the number of frequent flipping of the suspension ball due to impact, and can also improve the stability of the biofilm operation in the suspension ball.

[0033] In order to prevent the sealing cover 12 from being over-pressurized and causing the lightweight suspension ball body 10 to deform excessively, a limit pressure ring 13 is fixedly sleeved on the outside of the slide tube 11 and at both ends. The distance between the two limit pressure rings 13 is just the inner diameter of the suspension ball body 10 after the ball assembly is completed, and can be designed to be slightly smaller than the distance, which helps the two suspension ball bodies 10 to fit stably without loosening. The sealing cover 12 cooperates with the limit pressure ring 13 to press the suspension ball body 10, which can be more convenient to install and ensure the performance of the component after installation.

[0034] The thread sealing of the sealing cover 12 to the slide cylinder 11 can be performed by using a raw material tape or a sealing rubber ring.

[0035] Example 2, see Figure 1 , Figure 2 and Figure 6On the basis of the first embodiment, electromagnets 8 are embedded on both sides of the guide plate 5, and the counterweight 14 is a ferromagnetic material body. After the electromagnet 8 is energized, a magnetic force is generated to attract the counterweight 14. The electromagnet 8 absorbs and releases the counterweight 14 by intermittent energization, so that the counterweight 14 can slide in the slide 11, change the original counterweight position, so that the center of gravity of the suspension ball body 10 is redistributed, and then the posture of the suspension ball body 10 can be changed. This is the late stage of biofilm oxidation treatment of sewage. The filler core in the suspension ball body 10 increases due to the thickness of the mature biofilm, the fillers squeeze each other, and the gap rate becomes low. The filler is moved by flipping and the gap is readjusted. And because the suspension ball is easy to accumulate at the corners and water flow reversal of the biological fluidization tank 1, by intermittently absorbing and releasing the suspension ball body 10, changing its position in the water flow and providing kinetic energy when released, the accumulation rate of the suspension ball body 10 can be effectively reduced.

[0036] The electromagnet 8 is provided with a spring 9 on its outer sleeve, and one end of the spring 9 is fixedly mounted on the side of the guide plate 5. The length of the spring 9 in a static state is longer than the length of the electromagnet 8. When the electromagnet 8 adsorbs the counterweight 14, the suspension ball body 10 is squeezed at the end of the spring 9. Figure 7 , Figure 8 In the posture shown (there may also be a working condition: the middle side of the suspension ball body 10 contacts the end of the spring 9), when the counterweight 14 is released, the suspension ball body 10 changes its posture in advance, and combined with the position of the counterweight 14, the spring 9 can help the suspension ball body 10 to flip its posture; at the same time, the compressed spring 9 provides elastic potential energy to the suspension ball body 10 when released, preventing the suspension ball body 10 from piling up in one place.

[0037] In addition, in the later stage of biological contact oxidation treatment, just after the reaction is completed and before drainage, the spring 9 helps to remove the aged biofilm on the filler in the suspension ball body 10 through high-frequency adsorption and release, so that new biofilm can be generated during the next round of oxidation treatment, thereby improving the effective utilization rate of the filler. This operation can be performed as needed.

[0038] The installation position of the electromagnet 8 is not limited to the guide plate 5 in this embodiment, and can also be installed in places where it is easy to accumulate or where the impact of aeration is weak. The installation position is related to the water level. The suspension ball body 10 should be able to approach the electromagnet 8 when floating on the sewage surface. At the same time, the installation of the electromagnet 8 is inclined downward compared to the horizontal line, preferably 10 to 15 degrees (such as Figure 6 shown).

[0039] See also Figure 1 and Figure 2In order to prevent the accumulation of the suspended ball bodies 10 at the outlet pipe 3, a retaining net 7 is set up at the end of the outlet pipe 3. The direction of the retaining net 7 is along the water flow direction, and is inclined from the inner wall close to the biological fluidization tank 1 to the inner wall away from the biological fluidization tank 1. The spacing between the retaining net 7 and the inner wall of the biological fluidization tank 1 allows the suspended ball bodies 10 to pass through, and the accumulated suspended ball bodies 10 are diverted to prevent accumulation.

[0040] Example 3, see Fig. 9 The guide vanes 15 are arranged in an annular array outside the suspension ball body 10. The guide vanes 15 are arranged at an angle of 5 to 10 degrees compared to the generatrix of the suspension ball body 10. A single guide vane 15 will also be opened and closed synchronously with the opening and closing of the upper and lower hemispheres of the suspension ball body 10. The guide vanes 15 cooperate with the vertical water flow of the bottom aeration to drive the suspension ball body 10 to rotate, thereby more effectively promoting the full contact between the internal filler and the sewage, and obtaining sufficient oxygen, inhibiting the growth of anaerobic bacteria, slowing down the formation rate of the anaerobic layer, and improving the biological oxidation efficiency.

[0041] After adding the guide vane 15, biofilm can also be attached thereto, so that the deadweight of the suspension ball body 10 will also increase accordingly. The end seal of the slide tube 11 is changed to an increased body sealing cover 16. The increased body sealing cover 16 can be a hollow hemisphere, ellipsoid, square body, etc., to increase the drainage volume and increase the buoyancy.

[0042] Embodiment 3 can be implemented in conjunction with embodiments 1 and 2. When implemented in conjunction with embodiment 2, due to the inclined guide vanes 15, when the suspension ball body 10 is released, the guide vanes 15 are inclined so that the end away from the contact end contacts the water body first, thereby facilitating the flipping of the suspension ball body 10.

[0043] The method of use of the present invention is as follows:

[0044] Fill the inner core of the suspension ball body 10 with elastic fillers, ceramsite filter materials, activated carbon, etc. (fill as needed), insert the two hemispheres of the suspension ball body 10 into the two ends of the slide tube 11 in turn, slide the counterweight block 14 into the slide tube 11, install the sealing cover 12 and tighten it. After the batch assembly is completed, put the suspension ball body 10 into the biological fluidization pool 1; discharge the pretreated sewage into the biological fluidization pool 1 through the water inlet pipe 2, start the power fan blade 6, so that a circulating water flow is formed in the biological fluidization pool 1, start the diversion wall 4, wait for the filler in the suspension ball body 10 to complete the biofilm, and continue to wait for the biological contact oxidation separation. During the decomposition of organic matter in sewage, the aerated vertical water flow impacts the surface of the guide vane 15, causing the suspended ball body 10 to rotate in a fluidized state; when the filler is accumulated, the electromagnet 8 is started irregularly or regularly to intermittently energize the suspended ball body 10; in the last week of the sewage biological treatment cycle, the electromagnet 8 is started to promote the flipping of the suspended ball body 10, release the gap between the fillers, and ensure sufficient oxygen supply; after completing the final treatment stage, the electromagnet 8 is started on demand to work at high frequency and intermittently, and the spring 9 provides vibration characteristics to remove the aged biofilm, and then the outlet pipe 3 is opened to discharge into the secondary sedimentation tank for sedimentation.

Claims

1. A biofilm reaction type pharmaceutical wastewater treatment device, comprising a biological fluidized bed (1) and a suspension ball body (10), wherein the suspension ball body (10) is loaded with a biofilm filler rack, and the suspension ball body (10) is put into the biological fluidized bed (1) and suspended in the sewage in the biological fluidized bed (1), characterized in that: A counterweight (14) is embedded in the suspension ball body (10), and the counterweight (14) is used to change the center of gravity position of the suspension ball body (10) to a lower part.

2. A biofilm reaction type pharmaceutical wastewater treatment device according to claim 1, characterized in that: A slide cylinder (11) is fixedly sleeved at the central axis of the suspension ball body (10); the slide cylinder (11) is in a hollow cylindrical shape and sealed at both ends; a counterweight (14) slides in the slide cylinder (11).

3. A biofilm reaction type pharmaceutical wastewater treatment device according to claim 1, characterized in that: An electromagnet (8) is installed near the sewage surface in the biological fluidization tank (1); the counterweight (14) is a ferromagnetic object; the electromagnet (8) generates an attractive force on the counterweight (14) when it is powered on, and releases the counterweight (14) when it is powered off.

4. A biofilm reaction type pharmaceutical wastewater treatment device according to claim 3, characterized in that: The electromagnet (8) is externally sleeved with a spring (9), and the length of the spring (9) in a static state is greater than the length of the electromagnet (8).

5. A biofilm reaction type pharmaceutical wastewater treatment device according to claim 3, characterized in that: The electromagnet (8) is started regularly to flip the suspension ball body (10) to increase the filler gap after the biofilm matures and runs stably; it is started when the accumulation rate of the suspension ball body (10) is high to change the accumulation state; and it is started at a high frequency after the water treatment is completed to remove the aged biofilm.

6. A biofilm reaction type pharmaceutical wastewater treatment device according to any one of claims 1 to 5, characterized in that: The guide vanes (15) are arranged in an annular array outside the suspension ball body (10), and the guide vanes (15) are arranged obliquely relative to the generatrix of the suspension ball body (10).

7. A biofilm reaction type pharmaceutical wastewater treatment device according to claim 2, characterized in that: The limiting pressure rings (13) are fixedly sleeved on the outside of the slide cylinder (11) and at both ends, and the distance between the two limiting pressure rings (13) is adapted to the inner diameter of the suspension ball body (10) after the ball body is assembled.

8. A biofilm reaction type pharmaceutical wastewater treatment device according to claim 6, characterized in that: The end sealing body of the slide cylinder (11) is changed to an increased-body sealing cover (16), and the increased-body sealing cover (16) is a hollow body so as to increase the volume after being immersed in water.

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