CN217921626U

CN217921626U - Self-adaptive reoxygenation-free device

Info

Publication number: CN217921626U
Application number: CN202222257378.2U
Authority: CN
Inventors: 徐瑛; 张炜; 李文强; 王首都; 缪绎; 于少亭
Original assignee: Wuxi Water Group Co ltd; Shanghai Municipal Engineering Design Insitute Group Co Ltd
Current assignee: Wuxi Water Group Co ltd; Shanghai Municipal Engineering Design Insitute Group Co Ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-11-29
Anticipated expiration: 2032-08-26

Abstract

The utility model belongs to the water treatment facilities field, concretely relates to reoxygenation device is exempted from to self-adaptation. Comprises a flow guide unit, a water pressing unit and a falling weir. The falling weir is arranged on the water facing side of the partition wall, a water passing weir is formed when water flow turns over, and water passing holes are formed in the partition wall; the diversion unit is located on the water dropping side of the partition wall, and the water pressing unit is arranged above the diversion unit and used for fitting and pressing down water dropping. The utility model discloses the pressurized-water unit has realized that sewage does not take place the convection current with the air at the free fall in-process, and has avoided water column and liquid level acutely to collide the emergence aqueous vapor mixing, avoids reoxygenation effectual, can improve denitrogenation, dephosphorization reaction efficiency, reduces the medicament cost that outer carbon source thrown and add. The sewage quantity can be self-adapted, the sewage quantity can be automatically adjusted along with the sewage quantity, the variation range of the applicable water quantity is large, and the application range is wide. Simple structure is light and handy, reasonable in design, and the installation of being convenient for and dismantlement all can use on newly-built and transformation project.

Description

Self-adaptive reoxygenation-free device

Technical Field

The utility model belongs to the water treatment facilities field, concretely relates to reoxygenation device is exempted from to self-adaptation.

Background

In the sewage biochemical treatment process, dissolved oxygen in sewage can damage anaerobic and anoxic environments, activated sludge preferentially utilizes molecular oxygen to react in the presence of the dissolved oxygen, and the denitrification reaction of denitrifying bacteria and phosphorus release of phosphorus accumulating bacteria can be hindered, so that the denitrification and phosphorus removal effects are poor. Therefore, before the sewage is subjected to denitrification and anaerobic phosphorus release, the existence of a large amount of dissolved oxygen or the entering of a large amount of dissolved oxygen into the sewage is avoided as much as possible.

In engineering, in order to uniformly distribute water or prevent the downstream liquid level from jacking, the free outflow of a falling weir is usually adopted for control. In order to ensure enough water head to deal with extreme conditions, the free falling height is set to be larger, which causes multiple high fall falls in the whole water treatment process. The violent dissolved oxygen rise can occur in the process of water drop, and the mechanism is as follows: the water column drives the surrounding air to form rotational flow in the falling process, the rotational flow accelerates the circulation exchange of the air in the channel and the surrounding air, and the sewage falls into the wave formed instantly, so that the air and the sewage are fully mixed to accelerate reoxygenation. And when the water quantity changes greatly, the disturbance of the drop is more severe, and the degree of reoxygenation of the drop is aggravated.

The phenomenon of drop reoxygenation of sewage treatment plants in China is common, the concentration of dissolved oxygen is obviously increased (can be increased by 2-6 mg/L) after water drop, the 'invalid consumption' of an internal carbon source in sewage is obvious due to oxygen-carrying sewage, and the denitrification and dephosphorization effects are not ideal. In order to solve the problem caused by water drop reoxygenation, the prior art means comprises:

1. the raw sewage and the return sludge enter an anaerobic zone and an anoxic zone of the biological reaction tank, and a submerged inflow mode is adopted. However, when the amount of water needs to be distributed, the submerged inflow cannot ensure the uniformity of water distribution, and the water distribution effect is difficult to ensure.

2. An external carbon source is supplemented in the anaerobic and anoxic tanks, so that the denitrification or dephosphorization effect is ensured, and the problem of internal carbon source waste caused by a large amount of dissolved oxygen in the anaerobic and anoxic zone is solved. However, drop reoxygenation can result in inefficient consumption of one-fourth of the carbon source. This results in very large consumption of chemicals and high operating costs.

Therefore, it is urgently needed to develop a reoxygenation-free device capable of cooperating with a free outflow falling weir to solve the technical problems that the dissolved oxygen in the drop process of the existing sewage after turning over a weir crest is increased, the nitrogen and phosphorus removal efficiency is low, the adding amount of an external carbon source medicament is large, and the operation cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects existing in the prior art and providing a self-adaptive reoxygenation-free device.

Realize the utility model discloses the technical scheme of purpose is: a self-adaptive reoxygenation-free device is provided with a flow guide unit, a water pressing unit and a falling weir; the falling weir is arranged on the water facing side of the partition wall, a water passing weir is formed when water flow turns over, and water passing holes are formed in the partition wall; the diversion unit is located on the water dropping side of the partition wall, and the water pressing unit is arranged above the diversion unit and used for fitting and pressing down water dropping.

Further, the flow guide unit comprises a water passing arc-shaped plate, a flow guide plate, a support plate and a back plate; one end of the water passing arc-shaped plate is fixed on the partition wall, the other end of the water passing arc-shaped plate is fixed with a guide plate, the bottom end of the guide plate extends to the position below the liquid level of the drop, two supporting plates are respectively fixed at two ends of the water passing arc-shaped plate and the guide plate, and a back plate is fixed between the two supporting plates.

Further, the pressurized water unit comprises a pressurized water buoyancy chamber and an elastic lining curtain; the upper end of the water pressing floating cabin is connected with the partition wall above the water through hole through an elastic element, and the lower end of the water pressing floating cabin is hinged with the flow guide unit.

Furthermore, the water passing arc-shaped plate is flush with or slightly lower than the bottom of the water passing hole and is used for receiving sewage.

Furthermore, the supporting plate and the back plate are both higher than the water passing arc-shaped plate.

Furthermore, the pressurized-water floating cabin is of a cylindrical sealed cavity structure which is transversely arranged, the upper end of the pressurized-water floating cabin is an acute angle end formed by a top plane and a bottom inclined plane, and the middle of the pressurized-water floating cabin is of a cambered surface structure which protrudes downwards.

Furthermore, a water injection plug screw is arranged at the top of the pressurized-water floating cabin and used for injecting water into the cavity when the weight of the pressurized-water floating cabin is adjusted.

Furthermore, the elastic lining curtain is arranged in the flow guide unit, the top of the elastic lining curtain is connected with the cambered surface below the middle part of the pressurized-water floating cabin, the bottom of the elastic lining curtain is fixed on the inner wall of the flow guide unit, and the two sides of the elastic lining curtain are connected with the two sides of the water passing arc plate and the guide plate respectively.

Furthermore, the falling weir is any one of a concrete fixed weir, a stainless steel weir plate and an adjustable weir gate.

Further, the elastic element is a damping limit connector.

After the technical scheme is adopted, the utility model discloses following positive effect has:

(1) The utility model discloses the pressurized-water unit has realized that sewage is not taking place the convection current with the air freely falling the in-process, and has avoided water column and liquid level acutely to collide the emergence aqueous vapor mixing, and it is effectual to exempt from to reoxygenation, can improve denitrogenation, dephosphorization reaction efficiency, reduces the medicament cost that the external carbon source was thrown and is thrown.

(2) The utility model discloses can the self-adaptation sewage volume, can be along with sewage volume size automatically regulated, it is big to be suitable for water yield variation range, and the range of application is wide.

(3) The utility model discloses simple structure is light and handy, and reasonable in design is convenient for install and is dismantled, all can use newly-built and on the transformation project.

Drawings

In order that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings

FIG. 1 is a cross-sectional view of the small water volume of the present invention;

FIG. 2 is a schematic view of a cross-section of the water in a large water volume state of the present invention;

FIG. 3 is a schematic view of the structure of the water pressurizing unit of the present invention;

fig. 4 is a schematic view of the inside of the flow guide unit of the present invention.

Detailed Description

Referring to fig. 1 to 4, the utility model has a diversion unit 1, a water pressing unit 2 and a falling weir 3; the falling weir 3 is arranged on the water facing side of the partition wall, and forms a water passing weir when water flows cross over, so as to control the water level in front of the weir or achieve the purpose of water distribution. The partition wall is provided with water through holes, and sewage can flow from the water inlet side to the water outlet side of the water through holes. The diversion unit 1 is located the drop side of partition wall, and the pressurized-water unit 2 sets up in diversion unit 1 top position for paste and push down the drop. The falling weir 3 is any one of a concrete fixed weir, a stainless steel weir plate and an adjustable weir gate.

The flow guide unit 1 comprises a water passing arc-shaped plate 11, a flow guide plate 12, a support plate 13 and a back plate 14; one end of the water passing arc-shaped plate 11 is fixed on the partition wall, the other end of the water passing arc-shaped plate is fixed with a guide plate 12, and the bottom end of the guide plate 12 extends to the position below the water drop liquid level and is used for guiding sewage to flow downwards. Two ends of the water arc-shaped plate 11 and the guide plate 12 are respectively fixed with a supporting plate 13, and a back plate 14 is fixed between the two supporting plates 13. A guide unit 1 is formed, which can pass through the sewage and guide the sewage to flow downwards. The water passing arc-shaped plate 11 is flush with or slightly lower than the bottom of the water passing hole and is used for receiving sewage. The supporting plate 13 and the back plate 14 are both higher than the water passing arc plate 11.

The pressurized water unit 2 comprises a pressurized water buoyancy compartment 21 and an elastic lining curtain 22.

The upper end of the pressurized-water buoyancy chamber 21 is connected with a partition wall above the water through holes through an elastic element 23, and the lower end of the pressurized-water buoyancy chamber is hinged with the middle area of the inner side of the back plate 14 of the diversion unit 1 through a connecting arm. Can rotate freely. The elastic element 23 is a damping limit connector. One end of the damping limit connector is connected with a fixing bolt installed on the partition wall, the other end of the damping limit connector is connected with the end part of the pressurized-water floating cabin 21, the damping limit connector can prevent the pressurized-water floating cabin 21 from rotating at high frequency by a large margin, and the pressurized-water floating cabin 21 can be prevented from colliding with the back plate 14. The pressurized-water floating cabin 21 is a cylindrical sealed cavity structure which is transversely arranged, the cross section of the pressurized-water floating cabin is formed by tangency of an arc and an acute-angle triangle, the acute-angle end of the triangle is close to the water-facing side, the other end of the triangle is arc-shaped, and two ends of the cylindrical cavity are sealed to form a sealed cavity. The upper end of the pressurized-water floating cabin 21 is an acute angle end formed by a top plane and a bottom inclined plane, and the middle part of the pressurized-water floating cabin 21 is of a downward-protruding cambered surface structure. The top of the pressure floating cabin 21 is provided with a water injection plug screw 211 for injecting water into the cavity when the weight of the pressure floating cabin 21 is adjusted.

The elastic lining curtain 22 is arranged in the flow guide unit 1, the top of the elastic lining curtain 22 is connected with the tangential direction of the cambered surface below the middle part of the pressurized water floating cabin 21, the bottom of the elastic lining curtain 22 is fixed on the inner wall of the flow guide unit 1, and the two sides of the elastic lining curtain 22 are connected with the two sides of the water passing arc-shaped plate 11 and the guide plate 12 respectively. The elastic lining curtain 22 can be freely unfolded and folded along with the rotation of the pressurized-water buoyancy compartment 21, and the elastic lining curtain 22 cannot influence the rotation of the pressurized-water buoyancy compartment 21.

The water passing arc-shaped plate 11, the guide plate 12, the support plate 13, the back plate 14, the connecting arm and the hinge are made of stainless steel or high-strength corrosion-resistant light materials due to the consideration of sewage corrosion; the pressurized-water buoyancy chamber 21 can be made of stainless steel or high-strength corrosion-resistant light impervious material; the elastic inner lining curtain 22 can adopt rubber or corrosion-resistant elastic waterproof materials.

The utility model discloses a theory of operation does:

when sewage does not flow through the falling weir, the pressurized-water buoyancy chamber 21 freely falls downward due to gravity and is limited by the damping limit connector, and is kept at a low position and far away from the back plate 14, as shown in fig. 1. At this time, the space between the elastic lining curtain 22 and the water passing arc plate 11 is smaller or is in a fitting shape.

At the initial stage of the sewage falling weir, the sewage slowly flows down along the surface of the water passing arc-shaped plate 11 due to small water quantity, and severe water falling cannot occur. And the space between the elastic lining curtain 22 and the water passing arc-shaped plate 11 is narrow, so that air convection is blocked, and reoxygenation under the condition of small flow is further limited.

As shown in fig. 2, when the water passing amount increases, the pressurized-water buoyancy chamber 21 rotates toward the side of the back plate 14 due to the impact of the water flow and the buoyancy of the pressurized-water buoyancy chamber 21, and the space between the elastic inner lining curtain 22 and the water passing arc plate 11 becomes large, allowing the water flow to pass through. Meanwhile, the gravity of the pressurized-water buoyancy chamber 21 is used as well as the traction of the damping limiting connector, so that the pressurized-water buoyancy chamber 21 is tightly attached to the surface of the sewage, the elastic lining curtain 22 is ensured to be tightly contacted with the sewage, and no air convection occurs. Under the wrapping and flow guiding effects of the water passing arc-shaped plate 11 and the elastic lining curtain 22, sewage downwards enters below the liquid level along with the flow guide plate 12. The mixing of air and water and the convection with the surrounding air in the water drop process are avoided, and the reoxygenation-free function under the condition of large flow is achieved.

When the water quantity is changed from large to small, the liquid level begins to move towards the direction of the partition wall due to the fact that the impact force of water flow is weakened, and the liquid level and the elastic lining curtain 22 are mutually attached, so that the shape and the position of the elastic lining curtain 22 can be changed along with the change of the liquid level under the vacuum effect when the liquid level is withdrawn, and the elastic lining curtain 22 is always attached to the liquid level. And when the liquid level is lowered, the pressurized-water buoyancy chamber 21 moves downwards along with the liquid level and also pulls the elastic lining curtain 22 to move towards the water passing arc-shaped plate 11, so that the space is reduced, and no air mixing occurs.

When the water quantity changes, the pressurized-water buoyancy chamber 21 and the elastic lining curtain 22 are always attached to the surface of the water flow and can change along with the surface of the water flow under the coupling action of buoyancy, water flow impact force and vacuum, so that the problem of unsmooth drainage is avoided, jacking caused by free fall is avoided, and the problem of uneven water distribution is avoided.

The utility model discloses a set up self-adaptation pressurized-water unit 2, all can not take place drop and air mixing phenomenon when little water yield, big water yield and flow size change to the dissolved oxygen who has avoided the drop to cause rises. And simple structure is light and handy, reasonable in design, and the installation of being convenient for and dismantlement all can use on newly-built and transformation project.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A self-adaptive reoxygenation-free device is characterized in that: the device is provided with a flow guide unit (1), a water pressing unit (2) and a falling weir (3); the falling weir (3) is arranged on the water facing side of the partition wall, a water passing weir is formed when water flow crosses, and water passing holes are formed in the partition wall; the diversion unit (1) is located on the water dropping side of the partition wall, and the water pressing unit (2) is arranged above the diversion unit (1) and used for being attached to and pressing down water dropping.

2. The adaptive reoxygenation-free device according to claim 1, wherein: the flow guide unit (1) comprises a water passing arc-shaped plate (11), a flow guide plate (12), a support plate (13) and a back plate (14); cross water arc (11) one end and be fixed in on the partition wall, the other end is fixed with guide plate (12), guide plate (12) bottom extends to below the drop liquid level, cross water arc (11) and guide plate (12) both ends and be fixed with a backup pad (13) respectively, two be fixed with backplate (14) between backup pad (13).

3. The adaptive reoxygenation-free device according to claim 2, wherein: the pressurized water unit (2) comprises a pressurized water buoyancy chamber (21) and an elastic lining curtain (22); the upper end of the pressurized-water buoyancy chamber (21) is connected with a partition wall above the water through hole through an elastic element (23), and the lower end of the pressurized-water buoyancy chamber is hinged with the flow guide unit (1).

4. The adaptive reoxygenation-free device of claim 2, wherein: the water passing arc-shaped plate (11) is flush with or slightly lower than the bottom of the water passing hole and is used for receiving sewage.

5. The adaptive reoxygenation-free device of claim 2 or 4, wherein: the supporting plate (13) and the back plate (14) are both higher than the water passing arc-shaped plate (11).

6. The adaptive reoxygenation-free device according to claim 3, wherein: the pressurized-water floating cabin (21) is of a cylindrical sealed cavity structure which is transversely arranged, the upper end of the pressurized-water floating cabin (21) is an acute angle end formed by a top plane and a bottom inclined plane, and the middle of the pressurized-water floating cabin (21) is of a downward-protruding arc surface structure.

7. The adaptive reoxygenation-free device of claim 6, wherein: and a water injection plug screw (211) is arranged at the top of the pressurized-water floating cabin (21) and is used for injecting water into the cavity when the weight of the pressurized-water floating cabin (21) is adjusted.

8. The adaptive reoxygenation-free device of claim 3, wherein: elastic lining curtain (22) sets up in water conservancy diversion unit (1), the top and the pressurized-water buoyancy module (21) middle part below cambered surface of elastic lining curtain (22) are connected, and the bottom is fixed in water conservancy diversion unit (1) inner wall, elastic lining curtain (22) both sides link to each other with the both sides of crossing water arc (11) and guide plate (12) respectively.

9. The adaptive reoxygenation-free device according to claim 1, wherein: the falling weir (3) is any one of a concrete fixed weir, a stainless steel weir plate and an adjustable weir gate.

10. The adaptive reoxygenation-free device of claim 3, wherein: the elastic element (23) is a damping limit connector.