A phosphorus-containing flame retardant wastewater treatment device

Abstract

The utility model relates to water treatment technical field discloses a kind of phosphorus-containing flame retardant wastewater treatment equipment, the equipment includes anaerobic tank, oxygen tank and sedimentation tank communicated in turn, sedimentation tank bottom is equipped with material hopper, and material hopper bottom is fixedly installed with quantitative blowdown mechanism;The mechanism includes motor, transmission rod, worm wheel, stirring rod and discharge assembly, motor drives transmission rod to drive stirring rod and fan blade rotation stirring sludge, simultaneously through the meshing transmission of worm wheel and worm, drive the rotation of transmission pipe in discharge assembly, forcibly discharge pollutant.In addition, the transfer pipe one between anaerobic tank and oxygen tank is also provided with anti-reflux mechanism.The utility model is through integrated quantitative blowdown mechanism and anti-reflux mechanism, effectively solve the problem that sedimentation sludge is hard to discharge and is easy to reflux between treatment tank, significantly improve the automation level of equipment operation and the stability of treatment effect.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a wastewater treatment device containing phosphorus flame retardants. Background Technology

[0002] Phosphorus-containing flame retardants are widely used in various industrial fields such as plastics, textiles, and electronics due to their excellent flame-retardant properties. However, their production and use generate large amounts of industrial wastewater containing high concentrations of phosphorus and recalcitrant organic matter. If this wastewater is discharged directly without treatment, it will cause serious eutrophication pollution of aquatic environments; therefore, effective treatment is essential.

[0003] Currently, anaerobic / aerobic (A / O) biological treatment processes are commonly used for this type of phosphorus-containing wastewater. The core of this process lies in utilizing the phosphorus release and absorption characteristics of microorganisms under different environments to convert and enrich dissolved phosphorus in activated sludge. Subsequent sedimentation tanks then separate the sludge from the water, achieving phosphorus removal. This process is theoretically mature and effective.

[0004] However, in actual operation, a key problem gradually emerged. The phosphorus-rich activated sludge formed after the biological reaction continuously accumulated at the bottom of the sedimentation tank. Due to the sludge's inherent viscosity and its prolonged settling under gravity, it was highly susceptible to compaction and hardening, forming a sludge cake layer with extremely poor flowability.

[0005] This layer of hardened sludge severely impacts the normal operation of the equipment. Conventional sludge discharge ports or simple pump suction methods are often insufficient to effectively remove this solidified sludge, easily leading to clogging of the discharge ports and incomplete sludge removal. The continuous accumulation of sludge not only occupies the effective volume of the sedimentation tank, shortens the effective settling time of wastewater, and affects the quality of the effluent, but more seriously, the bottom sludge may undergo anaerobic decomposition due to lack of oxygen, causing the solidified phosphorus to be released back into the water, resulting in secondary pollution. This significantly reduces the effectiveness of the entire biological phosphorus removal process. Existing equipment generally lacks an integrated structure capable of actively and forcibly treating this hardened sludge, leading to frequent equipment shutdowns for manual cleaning. This not only increases operation and maintenance costs and labor intensity but also affects the continuity and stability of wastewater treatment.

[0006] Therefore, this utility model proposes a wastewater treatment device for phosphorus-containing flame retardants to overcome the shortcomings of the prior art. Utility Model Content

[0007] The purpose of this utility model is to provide a wastewater treatment device for phosphorus-containing flame retardants, which solves the problems of some existing wastewater treatment devices for phosphorus-containing flame retardants, such as difficulty in discharge, easy blockage, and impact on stable operation and treatment effect due to the sludge settling and hardening at the bottom of the tank.

[0008] To achieve the above objectives, this utility model provides a wastewater treatment device for phosphorus-containing flame retardants.

[0009] The system includes an anaerobic tank, an aerobic tank, a sedimentation tank, transfer pipe one, transfer pipe two, and a container; as well as a quantitative sewage discharge mechanism and a backflow prevention mechanism.

[0010] The quantitative sewage discharge mechanism includes a motor, a transmission rod, a worm gear, a stirring rod, a fan blade, and a discharge assembly. The discharge assembly includes a discharge pipe, a worm gear, and a transmission pipe.

[0011] Furthermore, the anaerobic tank is welded to the aerobic tank via transfer pipe one, and the aerobic tank is welded to the sedimentation tank via transfer pipe two. A hopper is fixedly connected to the bottom of the sedimentation tank, and a quantitative sewage discharge mechanism is fixedly installed at the bottom of the hopper. The motor is connected to a vertically installed transmission rod, the worm gear is fixedly sleeved on the transmission rod, the stirring rod is fixedly connected to the lower end of the transmission rod, and the fan blade is fixedly connected to the body of the stirring rod. Both the stirring rod and the fan blade are located inside the hopper. The discharge assembly is connected to the bottom of the hopper, and the worm and worm gear mesh for transmission. The transmission pipe is fixedly connected to the worm and rotatedly sleeved inside the discharge pipe.

[0012] The anti-backflow mechanism is installed inside the transfer tube. The anti-backflow mechanism includes a fixed tube, a baffle, a spring, and a fixing block. The baffle is slidably disposed inside the fixed tube. The fixing block is fixedly connected to one side of the baffle. The spring is sleeved on the outer periphery of the fixing block and abuts against the side of the baffle and the inner wall of the fixed tube.

[0013] One of the phosphorus-containing flame retardant wastewater treatment devices also includes a clear water tank, an overflow weir is fixedly connected to the top of the side wall of the sedimentation tank, the sedimentation tank is connected to the clear water tank through the overflow weir, an inlet is opened on the wall of the anaerobic tank, and an outlet is opened on the wall of the clear water tank.

[0014] The aerobic tank has a blower fixedly installed at the bottom, and the outer shell of the equipment has an air inlet, which is connected to the air inlet of the blower through an air inlet pipe.

[0015] The anti-backflow mechanism also includes a baffle pipe, which is fixedly connected to the inner wall of the fixed pipe and located on the path of the baffle moving towards the aerobic tank.

[0016] The anaerobic tank is equipped with a fixed guide pipe, with the inlet end of the guide pipe facing the water inlet.

[0017] The anaerobic tank, aerobic tank, sedimentation tank, and clear water tank are all detachably covered with a top cover, which is used to seal each tank and provide access for maintenance.

[0018] The container is a funnel-shaped structure that is wider at the top and narrower at the bottom, with a drain outlet at the bottom for connecting to the discharge assembly.

[0019] The outer wall of the transmission tube is integrally formed with helical blades, thus forming a helical conveying structure. This helical conveying structure rotates under the drive of the worm gear to force the pollutants entering the discharge tube to be discharged.

[0020] This utility model has the following beneficial effects: 1. The phosphorus flame retardant wastewater treatment equipment of this utility model solves the problems of easy sludge caking, difficult discharge, and easy blockage at the bottom of the sedimentation tank in the prior art by setting up a quantitative sewage discharge mechanism that works in concert with a motor, transmission rod, stirring rod, fan blade and spiral conveying structure. It achieves the technical effect of actively stirring and breaking up the sedimented sludge and realizing automated and quantitative forced discharge, which significantly improves sewage discharge efficiency and ensures the long-term stable operation of the equipment.

[0021] 2. The phosphorus flame retardant wastewater treatment equipment of this utility model solves the problem in the prior art that wastewater backflow can easily occur between multi-stage treatment tanks due to changes in liquid level or pressure fluctuations, thereby damaging the specific biochemical environment of each treatment unit. This is achieved by setting an anti-backflow mechanism in the transfer pipe of adjacent treatment tanks, which is opened by water pressure and reset by spring. This achieves the technical effect of ensuring unidirectional stable flow of wastewater between anaerobic and aerobic tanks, maintaining the environmental independence and stability of each biochemical reaction zone, thereby improving the overall phosphorus removal efficiency.

[0022] 3. The phosphorus flame retardant wastewater treatment equipment of this utility model organically combines an efficient quantitative sewage discharge mechanism, a reliable anti-backflow mechanism, and an anaerobic-aerobic biological treatment process, and sets up a guide pipe to buffer the inflow wastewater. This solves the problems of existing equipment having a simple structure, low degree of automation, unstable operation, and poor comprehensive treatment effect. It achieves the technical effect of compact equipment structure, complete process, high degree of automation, and reliable operation, making the treatment process of phosphorus flame retardant wastewater more efficient and controllable. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is a three-dimensional schematic diagram of a phosphorus-containing flame retardant wastewater treatment device proposed in this utility model. Figure 2 This is a schematic diagram of the structure of the guide pipe of the phosphorus-containing flame retardant wastewater treatment equipment proposed in this utility model; Figure 3This is a schematic diagram of the structure of the holding hopper of a phosphorus-containing flame retardant wastewater treatment device proposed in this utility model; Figure 4 This is a schematic diagram of the baffle of a phosphorus-containing flame retardant wastewater treatment device proposed in this utility model.

[0025] In the picture: 1. Anaerobic tank; 2. Aerobic tank; 3. Sedimentation tank; 4. Clear water tank; 5. Quantitative sewage discharge mechanism; 51. Motor; 52. Transmission rod; 53. Worm gear; 54. Stirring rod; 55. Fan blade; 56. Discharge assembly; 561. Discharge pipe; 562. Worm gear; 563. Transmission pipe; 57. Container hopper; 6. Transfer pipe one; 7. Anti-backflow mechanism; 71. Fixing pipe; 72. Fixing block; 73. Spring; 74. Baffle; 75. Barrier pipe; 8. Air inlet; 9. Fan; 10. Water inlet; 11. Top cover; 12. Water outlet; 13. Transfer pipe two; 14. Overflow weir; 15. Guide pipe. Detailed Implementation

[0026] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0027] Example:

[0028] Reference Figures 1 to 4 This utility model provides a phosphorus-containing flame retardant wastewater treatment device, which aims to solve the problems in the prior art, such as the difficulty in discharging precipitated sludge and the easy blockage caused by it, as well as the easy backflow of liquid between treatment tanks, which affects the treatment effect.

[0029] like Figure 1 As shown, the system includes an anaerobic tank 1, an aerobic tank 2, a sedimentation tank 3, and a clear water tank 4. The body of the anaerobic tank 1 is welded to the body of the aerobic tank 2 via a transfer pipe 1 6. The body of the aerobic tank 2 is welded to the body of the sedimentation tank 3 via a transfer pipe 2 13. An overflow weir 14 is fixedly connected to the top of the side wall of the sedimentation tank 3. The sedimentation tank 3 is connected to the clear water tank 4 via the overflow weir 14. An inlet 10 is provided on the wall of the anaerobic tank 1, and an outlet 12 is provided on the wall of the clear water tank 4. The tops of the anaerobic tank 1, the aerobic tank 2, the sedimentation tank 3, and the clear water tank 4 are all detachably covered by a top cover 11.

[0030] Reference Figure 1 and Figure 3The sedimentation tank 3 has a fixedly connected hopper 57 at its bottom. The hopper 57 is a funnel-shaped structure, wider at the top and narrower at the bottom, with a drain port at its bottom for communication with the discharge pipe 561 of the discharge assembly 56. The equipment also includes a quantitative discharge mechanism 5 fixedly installed at the bottom of the hopper 57. The quantitative discharge mechanism 5 includes a motor 51, a transmission rod 52, a worm gear 53, a stirring rod 54, and the discharge assembly 56. The transmission rod 52 is vertically arranged, and the output end of the motor 51 is connected to the top of the transmission rod 52. The worm gear 53 is fixedly sleeved on the transmission rod 52. The stirring rod... 54 is fixedly connected to the lower end of the transmission rod 52. A fan blade 55 is fixedly connected to the body of the stirring rod 54. Both the stirring rod 54 and the fan blade 55 are located inside the container 57. The discharge assembly 56 is connected to the bottom of the container 57. The discharge assembly 56 includes a discharge pipe 561, a worm 562 and a transmission pipe 563. The worm 562 meshes with the worm wheel 53 for transmission. The transmission pipe 563 is fixedly connected to the worm 562 and rotatably sleeved inside the discharge pipe 561. The outer wall of the transmission pipe 563 is integrally formed with spiral blades, thus forming a spiral conveying structure.

[0031] Reference Figure 1 , Figure 2 and Figure 4 An anti-backflow mechanism 7 is fixedly installed inside the transfer tube 6. The anti-backflow mechanism 7 includes a fixed tube 71, a baffle 74, a spring 73, a fixed block 72, and a blocking tube 75. The baffle 74 is slidably arranged inside the fixed tube 71. The fixed block 72 is fixedly connected to one side of the baffle 74. The spring 73 is sleeved on the outer periphery of the fixed block 72 and abuts against the side of the baffle 74 and the inner wall of the fixed tube 71 to provide a restoring elastic force to close the baffle 74 toward the anaerobic tank 1. The blocking tube 75 is fixedly connected to the inner wall of the fixed tube 71 and is located on the path of the baffle 74 moving toward the aerobic tank 2 to limit the opening stroke of the baffle 74.

[0032] The quantitative sewage discharge mechanism 5 includes a motor 51 as a power source and a transmission rod 52 driven by the motor 51. The top end of the transmission rod 52 is connected to the output end of the motor 51. The transmission rod 52 is vertically arranged on the central axis of the container 57. A worm gear 53 is fixedly sleeved on the transmission rod 52. The lower end of the transmission rod 52 extends out of the container 57 and is fixedly connected to an agitator 54. A fan blade 55 is also fixedly connected to the body of the agitator 54. The agitator 54 and the fan blade 55 are both located inside the receiving cavity of the container 57 and are used to agitate and push the pollutants that have settled inside the container 57.

[0033] The quantitative sewage discharge mechanism 5 also includes a discharge component 56, which is fixedly connected to the bottom sewage outlet of the container 57. The discharge component 56 includes a hollow discharge pipe 561, and a worm gear 562 is rotatably connected inside the discharge pipe 561. The worm gear 562 meshes with the worm wheel 53 for transmission. The discharge component 56 also includes a transmission pipe 563, which is fixedly connected to the worm gear 562 and rotatably sleeved inside the discharge pipe 561. The outer wall of the transmission pipe 563 is integrally formed with spiral blades, thereby forming a spiral conveying structure.

[0034] In the assembled state, when the motor 51 starts, its output power drives two mechanisms simultaneously via the transmission rod 52. On the one hand, it directly drives the stirring rod 54 and the fan blade 55 to rotate, crushing and stirring the sludge in the hopper 57. On the other hand, it drives the worm gear 562 meshing with the worm wheel 53 on the transmission rod 52 to rotate. The worm gear 562 then drives the transmission pipe 563 to rotate synchronously. The spiral conveying structure on the transmission pipe 563 then forcibly conveys and discharges the pollutants pushed by the fan blade 55 to the inlet of the discharge pipe 561.

[0035] Reference Figure 1 , Figure 2 and Figure 4 The backflow prevention mechanism 7 also includes a baffle pipe 75, which is fixedly connected to the inner wall of the fixed pipe 71 and located on the path of the baffle 74 moving toward the aerobic tank 2. A preset opening gap is left between its end and the baffle 74.

[0036] Reference Figure 1 and Figure 2 The anaerobic tank 1 is also fixedly connected to a guide pipe 15. The inlet end of the guide pipe 15 is set directly opposite the water inlet 10. The guide pipe 15 is a tubular structure with multiple guide holes.

[0037] Reference Figure 1 A blower 9 is fixedly installed at the bottom of the aerobic tank 2. An air inlet 8 is provided on the outer shell of the equipment. The air inlet 8 is connected to the air inlet end of the blower 9 through an air inlet pipe.

[0038] Reference Figure 1 The tops of the anaerobic tank 1, aerobic tank 2, sedimentation tank 3 and clear water tank 4 are detachably covered by a top cover 11, which is connected to the top edge of each tank by bolts.

[0039] The implementation principle of this application embodiment is as follows: wastewater containing phosphorus flame retardant enters the equipment through inlet 10 and first comes into contact with guide pipe 15. Under the guiding and buffering effect of guide pipe 15, it flows evenly into anaerobic tank 1. Anaerobic reaction and phosphorus release process take place in anaerobic tank 1. When the water level in anaerobic tank 1 continues to rise, the hydrostatic pressure generated acts on baffle 74 of anti-backflow mechanism 7. When the pressure is large enough, baffle 74 overcomes the rebound force of spring 73 and moves towards aerobic tank 2 until it is limited by blocking pipe 75. At this time, the channel of transfer pipe 6 is opened, and the wastewater after anaerobic treatment flows smoothly into aerobic tank 2. In aerobic tank 2, external air enters through air inlet 8 and continuously oxygenates the wastewater through fan 9 to carry out aerobic reaction and phosphorus absorption process.

[0040] The treated wastewater flows into the sedimentation tank 3 through transfer pipe 13. In the sedimentation tank 3, pollutants such as phosphorus-rich sludge settle and collect in the hopper 57 due to gravity, while the clear water on the upper layer flows into the clear water tank 4 through the overflow weir 14 and is finally discharged from the outlet 12. During the operation of the equipment, if the water level of the anaerobic tank 1 drops or backflow pressure is generated in the aerobic tank 2, the spring 73 will push the baffle 74 to automatically close the channel of transfer pipe 6.

[0041] When it is necessary to discharge the settled pollutants, the motor 51 in the quantitative discharge mechanism 5 is started. The motor 51 drives the stirring rod 54 and the fan blade 55 to rotate inside the hopper 57 through the transmission rod 52, breaking up the hardened sludge and pushing it to the discharge port at the bottom of the hopper 57. At the same time, the worm gear 53 on the transmission rod 52 meshes with the worm 562, and the worm 562 drives the transmission pipe 563 to rotate inside the discharge pipe 561. The spiral conveying structure on the transmission pipe 563 forces and quantitatively transports the pollutants entering the discharge pipe 561 to the outside of the equipment.

[0042] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A wastewater treatment device for phosphorus-containing flame retardants, comprising an anaerobic tank, an aerobic tank, and a sedimentation tank, wherein the body of the anaerobic tank is welded to the body of the aerobic tank via a transfer pipe one, the body of the aerobic tank is welded to the body of the sedimentation tank via a transfer pipe two, and a hopper is fixedly connected to the bottom of the sedimentation tank. Its features are, The device also includes a quantitative sewage discharge mechanism fixedly installed at the bottom of the container. The quantitative sewage discharge mechanism includes a motor, a vertically arranged transmission rod, a worm gear fixedly sleeved on the transmission rod, and a stirring rod fixedly connected to the lower end of the transmission rod. A fan blade is fixedly connected to the body of the stirring rod. The output end of the motor is connected to the top end of the transmission rod. The stirring rod and the fan blade are both located inside the container. The quantitative sewage discharge mechanism also includes a discharge assembly. The discharge assembly communicates with the bottom of the container. The discharge assembly includes a discharge pipe, a worm gear meshing with the worm gear, and a transmission pipe fixedly connected to the worm gear and rotatably sleeved inside the discharge pipe. An anti-backflow mechanism is fixedly installed inside the transfer tube. The anti-backflow mechanism includes a fixed tube, a baffle, a spring, and a fixing block. The baffle is slidably arranged inside the fixed tube. A fixing block is fixedly connected to one side of the baffle. The spring is sleeved on the outer periphery of the fixing block and abuts against the side of the baffle and the inner wall of the fixed tube to provide a restoring elastic force to close the baffle toward the anaerobic tank.

2. The phosphorus-containing flame retardant wastewater treatment equipment as described in claim 1, characterized in that, The equipment also includes a clear water tank, and an overflow weir is fixedly connected to the top of the side wall of the sedimentation tank. The sedimentation tank is connected to the clear water tank through the overflow weir. An inlet is provided on the wall of the anaerobic tank, and an outlet is provided on the wall of the clear water tank.

3. The phosphorus-containing flame retardant wastewater treatment equipment as described in claim 1, characterized in that, A blower is fixedly installed at the bottom of the aerobic tank. An air inlet is provided on the outer shell of the equipment. The air inlet is connected to the air inlet of the blower through an air inlet pipe, and is used to supply oxygen to the wastewater in the aerobic tank.

4. The phosphorus-containing flame retardant wastewater treatment equipment as described in claim 1, characterized in that, The backflow prevention mechanism also includes a baffle pipe, which is fixedly connected to the inner wall of the fixed pipe and located on the path of the baffle moving toward the aerobic tank, and is used to limit the opening stroke of the baffle.

5. The phosphorus-containing flame retardant wastewater treatment equipment as described in claim 2, characterized in that, The anaerobic tank is fixedly connected to a guide pipe, with the inlet end of the guide pipe facing the water inlet, which is used to guide and buffer the wastewater entering the anaerobic tank to prevent blockage.

6. The phosphorus-containing flame retardant wastewater treatment equipment as described in claim 1 or 2, characterized in that, The anaerobic tank, aerobic tank, sedimentation tank, and clear water tank are all detachably covered by a top cover, which is used to seal each tank and provide access for maintenance.

7. The phosphorus-containing flame retardant wastewater treatment equipment as described in claim 1, characterized in that, The container is a funnel-shaped structure that is wider at the top and narrower at the bottom. Its bottom has a drain port for communicating with the drain pipe of the discharge component, so that pollutants can be concentrated in the drain port under the action of gravity.

8. The phosphorus-containing flame retardant wastewater treatment equipment as described in claim 1, characterized in that, The outer wall of the transmission tube is integrally formed with helical blades, thereby forming a helical conveying structure. The helical conveying structure rotates under the drive of the worm gear to force the pollutants entering the discharge tube to be discharged.

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