Wastewater biochemical treatment device for dimethyl ester production

Abstract

The present invention relates to the technical field of wastewater biochemical treatment, particularly to a dimethyl ester production wastewater biochemical treatment apparatus, which comprises a biochemical box, the upper end of the biochemical box is fixedly provided with a box cover, and the interior of the biochemical box is divided into an anaerobic zone, an aerobic zone, an adsorption zone and a water outlet zone through a first partition plate, a second partition plate and a third partition plate, an aeration head is arranged in the aerobic zone, a gas conveying pipe extending to the outer side of the box cover is arranged at the upper end of the aeration head, the wastewater biochemical treatment device further comprises a wave blocking mechanism and a turning mechanism, and the wave blocking mechanism is arranged in the aerobic zone and used for inhibiting water surface fluctuation caused by oxygenation of the aeration head in the aerobic zone. Water surface fluctuation caused by aeration is effectively inhibited, the water level and overflow flow of an aerobic zone are stabilized, meanwhile, it is guaranteed that strain culture mud is always immersed in wastewater through a floating structure, exposure failure is avoided, the biochemical degradation efficiency is improved, and strain loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of wastewater biochemical treatment technology, and in particular to a wastewater biochemical treatment device for dimethyl ester production. Background Technology

[0002] Dimethyl ester production wastewater is a type of organic wastewater with high COD, trace amounts of ester or alcohol toxicity, and a slightly acidic pH. The core logic of biological treatment is to first pre-treat to eliminate toxicity and adjust the water quality to suit microorganisms, then decompose the main pollutants through a combination of anaerobic degradation of high-concentration COD and aerobic degradation of residual organic matter, and finally ensure compliance with standards through advanced treatment, while simultaneously handling sludge to avoid secondary pollution.

[0003] The existing aerobic degradation stage of dimethyl ester production wastewater biochemical treatment requires continuous aeration to supply oxygen to the water body. The rising bubbles generated by aeration cause violent fluctuations in the water surface, which not only directly leads to unstable control of the overflow velocity from the aerobic zone to subsequent units, resulting in drastic fluctuations in the hydraulic retention time of the treatment units and incomplete wastewater degradation reactions, but also causes the hydraulic load of subsequent adsorption units to fluctuate, making it easy for the adsorption layer to penetrate prematurely and making it difficult to guarantee the stability of effluent quality. At the same time, the frequent water level fluctuations caused by aeration cause conventionally fixed biological packing materials and bacterial carriers to be frequently exposed to air and water, resulting in the inactivation and death of aerobic functional bacteria, significantly reducing the biochemical degradation efficiency. Furthermore, the suspended bacteria are easily lost with the overflow wastewater, requiring frequent replenishment of bacteria, which significantly increases the operation and maintenance costs of the equipment.

[0004] Therefore, a biochemical treatment device for wastewater from dimethyl ester production is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a wastewater biochemical treatment device for dimethyl ester production, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a biological treatment device for wastewater from dimethyl ester production, comprising a biological tank, a tank cover fixedly installed at the upper end of the biological tank, the interior of the biological tank being divided into an anaerobic zone, an aerobic zone, an adsorption zone, and an effluent zone by a first partition, a second partition, and a third partition, an aerobic zone being provided inside the aerobic zone, an aeration head being provided inside the aeration head, and an air supply pipe extending to the outside of the tank cover being provided at the upper end of the aeration head, the wastewater biological treatment device further comprising a wave-damping mechanism and a turning mechanism, the wave-damping mechanism being located inside the aerobic zone to suppress water surface fluctuations caused by oxygenation by the aeration head inside the aerobic zone, and the wave-damping mechanism being located inside the aerobic zone and the adsorption zone, capable of using the power provided by the water potential difference to turn the wastewater at the bottom of the aerobic zone.

[0007] Preferably, an inlet pipe is fixedly connected to the side of the anaerobic zone, an overflow port is provided on the second partition, an adsorption layer is provided between the adsorption zone and the effluent zone, an outlet pipe is fixedly connected to the side of the adsorption zone, and an outlet pipe is fixedly connected to the side of the effluent zone.

[0008] Preferably, the wave-damping mechanism includes several sets of slide rails fixedly installed inside the aerobic zone, wave-damping plates slidably connected between two sets of slide rails, floating plates fixedly installed on the upper side of the wave-damping plates, and two sets of floating plates connected by two sets of symmetrical connecting ropes.

[0009] Preferably, an overflow plate is fitted at the bottom of the overflow port, and one end of a connecting rod is fixedly connected to one side of the overflow plate, while the other end of the connecting rod is fixedly installed on the wave-damping plate.

[0010] Preferably, the wave baffle has several sets of flow ports, and a support rod is fixedly installed inside the flow ports. Several sets of lower and upper protective covers are evenly fitted on the outside of the support rod. The upper protective cover is fixedly installed at the upper end of the lower protective cover by screws. Microbial culture mud is inserted between the lower and upper protective covers. A limiting plate is provided at the bottom of the lower protective cover, and the limiting plate is fixedly installed on the support rod.

[0011] Preferably, the turning mechanism includes a protective plate fixedly installed on the second partition plate on the inner wall of the adsorption zone. The upper end of the protective plate is provided with a diversion groove, and a water wheel is rotatably connected to the side of the protective plate. Each of the six sets of blades of the water wheel is provided with a water receiving groove.

[0012] Preferably, a large gear is rotatably connected inside the guard plate, and a water wheel is fixedly connected to one side of the large gear via a rotating rod. The large gear meshes with a small gear, and the small gear is rotatably connected to the guard plate.

[0013] Preferably, a first synchronous pulley is fixedly installed on the side of the small gear, and a second synchronous pulley is connected to the first synchronous pulley via a synchronous belt drive. A stirring rod is fixedly connected to the side of the second synchronous pulley, and one end of the stirring rod passes through the second partition and is fixedly connected to several sets of stirring blades.

[0014] The beneficial effects of this invention are:

[0015] 1. This invention, through the design of a wave-damping mechanism, utilizes a buoyancy group of multiple interconnected wave-damping plates to achieve multi-stage rectification and suppress aeration surges. Linked with the overflow plate, it can adaptively adjust the overflow water level and flow rate, significantly improving the device's resistance to fluctuations in the quality and quantity of dimethyl ester production wastewater. This ensures stable hydraulic retention time in the treatment unit. By integrating microbial culture sludge onto the floating wave-damping plate, it eliminates the need for additional aerobic zone volume or independent packing frames, achieving layered and uniform distribution of functional microorganisms and full-time immersion protection. This improves pollutant degradation efficiency while preventing microbial loss and inactivation, reducing operation and maintenance costs and the frequency of microbial replenishment, simplifying the aerobic zone structure, and increasing equipment volume utilization.

[0016] 2. This invention, by designing a turning mechanism in conjunction with a wave-damping mechanism, fully utilizes the gravitational potential energy during the wastewater overflow process to achieve continuous stirring and turning of the water at the bottom of the aerobic zone. While significantly reducing the energy consumption and equipment investment of the device, it effectively solves the problem of insufficient contact between the sedimented wastewater at the bottom of the aerobic zone and the bacteria, further improving the biochemical treatment efficiency and effluent stability of dimethyl ester production wastewater. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional schematic diagram of a wastewater biochemical treatment device for dimethyl ester production according to an embodiment of the present invention.

[0019] Figure 2 This invention provides a wastewater biochemical treatment device for dimethyl ester production. Figure 1 Schematic diagram of cross-section at point AA;

[0020] Figure 3 This invention provides a wastewater biochemical treatment device for dimethyl ester production. Figure 2 Enlarged view of point B in the middle;

[0021] Figure 4 This is a three-dimensional schematic diagram of the wave-damping mechanism of a wastewater biochemical treatment device for dimethyl ester production according to an embodiment of the present invention;

[0022] Figure 5 This is a partial explosion diagram of the wave-damping mechanism of a wastewater biochemical treatment device for dimethyl ester production according to an embodiment of the present invention.

[0023] Figure 6 This is a three-dimensional schematic diagram of a protective plate for a wastewater biochemical treatment device used in the production of dimethyl ester, according to an embodiment of the present invention.

[0024] Figure 7 This is a partial three-dimensional schematic diagram of the turning mechanism of a wastewater biochemical treatment device for dimethyl ester production according to an embodiment of the present invention.

[0025] The diagram is labeled as follows: 1. Biochemical tank; 11. Tank cover; 12. First partition; 13. Second partition; 131. Overflow outlet; 14. Third partition; 15. Anaerobic zone; 151. Inlet pipe; 16. Aerobic zone; 17. Adsorption zone; 171. Outlet pipe; 172. Adsorption layer; 18. Effluent zone; 181. Effluent pipe; 19. Aeration head; 191. Air supply pipe; 2. Wave-damping mechanism; 21. Slide rail; 22. Wave-damping plate; 22. 1. Outlet; 23. Float; 24. Connecting rope; 25. Overflow plate; 251. Connecting rod; 26. Support rod; 261. Limiting plate; 27. Lower protective cover; 28. Upper protective cover; 29. ​​Microbial culture mud; 3. Turning mechanism; 31. Protective plate; 311. Drainage channel; 32. Water wheel; 33. Large gear; 34. Small gear; 35. First synchronous belt pulley; 36. Second synchronous belt pulley; 37. Stirring rod; 38. Stirring blade. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] Please see Figures 1 to 7This invention provides a technical solution: a biochemical treatment device for wastewater from dimethyl ester production, comprising a biochemical tank 1, with a tank cover 11 fixedly installed on the upper end of the biochemical tank 1. The interior of the biochemical tank 1 is divided into an anaerobic zone 15, an aerobic zone 16, an adsorption zone 17, and an effluent zone 18 by a first partition 12, a second partition 13, and a third partition 14. An aeration head 19 is provided inside the aerobic zone 16, and an air supply pipe 191 extending to the outside of the tank cover 11 is provided at the upper end of the aeration head 19. The wastewater biochemical treatment device also includes a wave-damping mechanism 2 and a turning mechanism 3. The wave-damping mechanism 2... The aerobic zone 16 is installed inside to suppress water surface fluctuations caused by oxygenation from the aeration head 19 inside the aerobic zone 16. The wave-damping mechanism 2 is installed inside the aerobic zone 16 and the adsorption zone 17, and can use the power provided by the water potential difference to agitate the wastewater at the bottom of the aerobic zone 16. The side of the anaerobic zone 15 is fixedly connected to the inlet pipe 151. The second partition 13 is provided with an overflow port 131. An adsorption layer 172 is provided between the adsorption zone 17 and the effluent zone 18. The side of the adsorption zone 17 is fixedly connected to the outlet pipe 171, and the side of the effluent zone 18 is fixedly connected to the outlet pipe 181.

[0029] As one embodiment of the present invention, such as Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the wave-damping mechanism 2 includes several sets of slide rails 21 fixedly installed inside the aerobic zone 16. A wave-damping plate 22 is slidably connected between two sets of slide rails 21. A float plate 23 is fixedly installed on the upper side of the wave-damping plate 22. Two sets of float plates 23 are connected by two sets of symmetrical connecting ropes 24. An overflow plate 25 is clamped at the bottom of the overflow port 131. One end of a connecting rod 251 is fixedly connected to one side of the overflow plate 25. The other end of the connecting rod 251 is fixedly installed on the wave-damping mechanism. On the plate 22, the wave-damping plate 22 has several sets of flow ports 221. A support rod 26 is fixedly installed inside the flow port 221. Several sets of lower protective covers 27 and upper protective covers 28 are evenly fitted on the outside of the support rod 26. The upper protective cover 28 is fixedly installed on the upper end of the lower protective cover 27 by screws. A microbial culture mud 29 is stuck between the lower protective cover 27 and the upper protective cover 28. A limiting plate 261 is provided at the bottom end of the lower protective cover 27. The limiting plate 261 is fixedly installed on the support rod 26.

[0030] By adopting the above technical solution, since the aerobic degradation of wastewater requires the input of oxygen, the input oxygen can easily cause large fluctuations in the water surface, making it difficult to stably control the overflow velocity. During use, several groups of wave-damping plates 22 with float plates 23 are connected by connecting ropes 24 to form a buoyancy group. This provides greater buoyancy, allowing it to pull individual wave-damping plates 22, reducing the impact of individual wave-damping plates 22 becoming stuck on wave-damping. The buoyancy group formed by several groups of wave-damping plates 22, through connecting rods 251, can drive the overflow plate 25 to rise and fall during water level changes caused by aeration, thus allowing for appropriate adjustment of the overflow. The water level is adjusted to reduce fluctuations in wastewater flow and improve adaptability. Finally, the flow of the microbial culture mud 29 is restricted by the lower cover 27 and the upper cover 28. The support rod 26 and the limiting plate 261 are used to evenly arrange several groups of microbial culture mud 29. This not only improves the contact effect between the microbial culture mud 29 and the wastewater, but also prevents the loss of the microbial culture mud 29 and reduces its loss. Furthermore, the microbial culture mud 29 can float up and down with the wave baffle 22, so that the microbial culture mud 29 can always be immersed in the wastewater, avoiding the failure of some microbial culture mud 29 due to exposure.

[0031] As one embodiment of the present invention, such as Figure 2 , Figure 6 and Figure 7 As shown, the agitation mechanism 3 includes a protective plate 31 fixedly installed on the second partition 13 on the inner wall of the adsorption zone 17. A flow channel 311 is provided at the upper end of the protective plate 31. A water wheel 32 is rotatably connected to the side of the protective plate 31. Water receiving grooves are opened on the six sets of blades of the water wheel 32. A large gear 33 is rotatably connected inside the protective plate 31. The water wheel 32 is fixedly connected to one side of the large gear 33 through a rotating rod. The large gear 33 meshes with a small gear 34. The small gear 34 is rotatably connected to the protective plate 31. A first synchronous pulley 35 is fixedly installed on the side of the small gear 34. The first synchronous pulley 35 is connected to a second synchronous pulley 36 through a synchronous belt drive. A stirring rod 37 is fixedly connected to the side of the second synchronous pulley 36. One end of the stirring rod 37 passes through the second partition 13 and is fixedly connected to several sets of stirring blades 38.

[0032] By adopting the above technical solution, the wastewater overflowing from the top of the overflow plate 25 inside the overflow port 131 first flows into the water receiving tank of the water wheel 32. The combined weight of the water in the receiving tank, which is receiving water and the water is discharging water, can overcome the resistance and drive the water wheel 32 to rotate continuously. Then, the water wheel 32 drives the first synchronous pulley 35 to rotate faster through the meshing large gear 33 and small gear 34. Finally, the first synchronous pulley 35 drives the stirring rod 37 on one side of the second synchronous pulley 36 to rotate continuously through the synchronous belt, so that the stirring blades 38 on the stirring rod 37 can continuously agitate the wastewater at the bottom of the aerobic zone 16. This is beneficial to use the water potential difference of the overflowing wastewater to accelerate the stirring blades 38 to agitate the wastewater at the bottom of the aerobic zone 16, so that the wastewater at the bottom of the aerobic zone 16 can fully contact the bacterial culture mud 29, thereby improving the biochemical treatment effect.

[0033] Working principle: During use, several sets of wave-damping plates 22 with float plates 23 are connected by connecting ropes 24 to form a buoyancy group, which has a large buoyancy to pull individual wave-damping plates 22, reducing the impact of individual wave-damping plates 22 jamming on wave-damping. The buoyancy group formed by several sets of wave-damping plates 22 can drive the overflow plate 25 to rise and fall during the water level change caused by aeration through connecting rods 251, so that it can adjust the overflow water level appropriately, reduce the fluctuation of wastewater flow, and improve the self-adaptive ability. Finally, the flow of microbial culture mud 29 is restricted by the lower protective cover 27 and the upper protective cover 28, and the several sets of microbial culture mud 29 are evenly distributed by the support rods 26 and the limiting plate 261. This not only improves the contact effect between microbial culture mud 29 and wastewater, but also prevents the loss of microbial culture mud 29, reduces the loss of microbial culture mud 29, and the microbial culture mud 29 can float up and down with the wave-damping plates 22, so that the microbial culture mud 29 can always be immersed in wastewater, avoiding the failure of some microbial culture mud 29 due to exposure.

[0034] First, the wastewater overflowing from the top of the overflow plate 25 inside the overflow port 131 flows into the water receiving tank of the water wheel 32. The combined weight of the water in the receiving tank, which is receiving water and the water is discharging water, can overcome the resistance and drive the water wheel 32 to rotate continuously. Then, the water wheel 32 drives the first synchronous pulley 35 to rotate faster through the meshing large gear 33 and small gear 34. Finally, the first synchronous pulley 35 drives the stirring rod 37 on one side of the second synchronous pulley 36 to rotate continuously through the synchronous belt, so that the stirring blades 38 on the stirring rod 37 can continuously agitate the wastewater at the bottom of the aerobic zone 16.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wastewater biochemical treatment device for dimethyl ester production, comprising a biochemical tank (1), wherein a tank cover (11) is fixedly installed on the upper end of the biochemical tank (1), and the interior of the biochemical tank (1) is divided into an anaerobic zone (15), an aerobic zone (16), an adsorption zone (17), and an effluent zone (18) by a first partition (12), a second partition (13), and a third partition (14), wherein an aeration head (19) is provided inside the aerobic zone (16), and an air supply pipe (191) extending to the outside of the tank cover (11) is provided at the upper end of the aeration head (19), characterized in that: The wastewater biochemical treatment device also includes a wave-blocking mechanism (2) and a turning mechanism (3). The wave-blocking mechanism (2) is set inside the aerobic zone (16) to suppress water surface fluctuations caused by oxygenation by the aeration head (19) inside the aerobic zone (16). The wave-blocking mechanism (2) is set inside the aerobic zone (16) and the adsorption zone (17) and can use the power provided by the water potential difference to turn the wastewater at the bottom of the aerobic zone (16).

2. The wastewater biochemical treatment device for dimethyl ester production according to claim 1, characterized in that, The anaerobic zone (15) is fixedly connected to the side of the sewage inlet pipe (151), and the second partition (13) is provided with an overflow port (131). An adsorption layer (172) is provided between the adsorption zone (17) and the effluent zone (18). The adsorption zone (17) is fixedly connected to the side of the sewage outlet pipe (171), and the effluent zone (18) is fixedly connected to the side of the effluent zone (18).

3. The wastewater biochemical treatment device for dimethyl ester production according to claim 1, characterized in that, The wave-blocking mechanism (2) includes several sets of slide rails (21) fixedly installed inside the aerobic zone (16). A wave-blocking plate (22) is slidably connected between two sets of slide rails (21). A float plate (23) is fixedly installed on the upper side of the wave-blocking plate (22). The two sets of float plates (23) are connected by two sets of symmetrical connecting ropes (24).

4. The wastewater biochemical treatment device for dimethyl ester production according to claim 2, characterized in that, An overflow plate (25) is fixedly installed at the bottom of the overflow port (131). One end of a connecting rod (251) is fixedly connected to one side of the overflow plate (25), and the other end of the connecting rod (251) is fixedly installed on the wave baffle plate (22).

5. A wastewater biochemical treatment device for dimethyl ester production according to claim 3, characterized in that, The wave-damping plate (22) has several sets of flow ports (221). A support rod (26) is fixedly installed inside the flow port (221). Several sets of lower protective covers (27) and upper protective covers (28) are evenly fitted on the outside of the support rod (26). The upper protective cover (28) is fixedly installed on the upper end of the lower protective cover (27) by screws. A microbial culture mud (29) is stuck between the lower protective cover (27) and the upper protective cover (28). A limiting plate (261) is provided at the bottom of the lower protective cover (27). The limiting plate (261) is fixedly installed on the support rod (26).

6. The wastewater biochemical treatment device for dimethyl ester production according to claim 1, characterized in that, The turning mechanism (3) includes a guard plate (31) fixedly installed on the second partition (13) on the inner wall of the adsorption zone (17). The upper end of the guard plate (31) is provided with a diversion groove (311). The side of the guard plate (31) is rotatably connected to a water wheel (32). The six sets of blades of the water wheel (32) are all provided with water receiving grooves.

7. A wastewater biochemical treatment device for dimethyl ester production according to claim 6, characterized in that, The guard plate (31) is rotatably connected to a large gear (33), and a water wheel (32) is fixedly connected to one side of the large gear (33) via a rotating rod. The large gear (33) meshes with a small gear (34), and the small gear (34) is rotatably connected to the guard plate (31).

8. A wastewater biochemical treatment device for dimethyl ester production according to claim 7, characterized in that, The small gear (34) is fixedly mounted with a first synchronous pulley (35) on its side. The first synchronous pulley (35) is connected to a second synchronous pulley (36) via a synchronous belt drive. The side of the second synchronous pulley (36) is fixedly connected with a stirring rod (37). One end of the stirring rod (37) passes through the second partition (13) and is fixedly connected with several sets of stirring blades (38).

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