Novel energy dissipation drain tank

Abstract

The utility model belongs to the technical field of seawater desalination engineering, and particularly discloses a novel energy dissipation drain tank which comprises a drain chamber, a water inlet pipeline, a middle weir and a drain pipeline, the middle weir divides the drainage chamber into a water inlet section and a water outlet section, and two ends of the middle weir are provided with vacuum breaking side walls; the water inlet section can be selectively provided with a flow distribution column according to the water flow characteristic of inlet water; the water outlet section comprises an L-shaped baffle plate, a flow guide sill and a final-stage flow guide plate; the baffle plate is arranged at the downstream of the middle weir, and the bottom of the baffle plate is supported by a plurality of columns; and the flow guide sill is arranged at the downstream of the baffle plate. The energy dissipation drain tank has the advantages that the energy dissipation drain tank effectively consumes and disperses the energy of water flow by optimizing the structural design, and effectively solves the problems of larger water flow impact, inconvenience in pollutant cleaning and high cleaning cost of the drain tank by utilizing air bubbles carried by air in the flowing process, thereby ensuring the safe and stable operation of the drain tank.

Description

TECHNICAL FIELD

[0001] The utility model relates to seawater desalination engineering technical field, concretely is a novel energy dissipation drainage pool. BACKGROUND

[0002] In the seawater desalination project engineering, the design and operation of the drainage pool have important influence on the stability and operation efficiency of the whole system. A large amount of concentrated brine and flushing wastewater will be produced in the seawater desalination process, and these wastewaters usually have the characteristics of high flow rate and high pressure in the pipeline. If not treated by effective energy dissipation (energy dissipation) directly discharged, the strong kinetic energy can cause serious threat to the infrastructure of the drainage system, including the severe scouring and abrasion of the drainage pipeline and its auxiliary equipment, leading to the shortening of service life, and even can cause structural damage. In addition, the strong noise and vibration accompanied by high-speed water flow not only cause adverse effects on the surrounding environment, but also can potentially harm the health and safety of the operators. Therefore, the scientificity and effectiveness of the drainage pool design are directly related to the long-term stability, high efficiency and environmental protection of the seawater desalination engineering.

[0003] The traditional drainage pool design structure is relatively simple, usually only includes the water inlet, the water outlet and the necessary water flow channel, less involves the complex energy dissipation structure or wastewater purification treatment unit. The existing energy dissipation design usually adopts the ways of expanding the water flow section or controlling the water jump, and the energy dissipation efficiency is low, and usually needs a large area, which is difficult to meet the high efficient treatment requirements of large scale wastewater discharge in large scale seawater desalination engineering. At the same time, the traditional drainage pool usually relies on the mechanical aeration equipment driven by motor to remove the suspended pollutants in the wastewater, and this way not only has high energy consumption, but also has complex equipment maintenance and large operation cost. If the large amount of suspended pollutants in the water body cannot be cleaned in time, these pollutants will gradually accumulate in the drainage system, causing pipe blockage, reducing the system operation efficiency, and possibly causing serious harm to the surrounding ecological environment.

[0004] Therefore, the limitations of the traditional drainage pool design in energy dissipation efficiency and environmental adaptability have been difficult to meet the needs of seawater desalination engineering for efficient and environmentally friendly drainage system. In order to cope with the technical challenges brought by high flow rate and high pollution wastewater discharge in seawater desalination engineering, it is urgent to develop a new type of drainage pool. UTILITY MODEL CONTENT

[0005] In view of the deficiencies in the prior art, the utility model provides a novel energy dissipation drainage pool. The energy dissipation efficiency is increased by reasonable design, and at the same time, the air entrainment bubble produces air floatation effect, timely removes a large amount of suspended solids in wastewater, effectively reduces the pollutant concentration in the sea drainage wastewater, and solves the problems mentioned in the above background. Its technical scheme is:

[0006] The utility model provides a new energy dissipation drainage pool, including drainage chamber, water inlet pipeline, drainage pipeline and intermediate weir, the intermediate weir is fixed vertically in the drainage chamber, the intermediate weir divides the drainage chamber into water inlet section and water outlet section, the side wall of water inlet section is equipped with the water inlet with pressure water inlet pipeline is adapted, and the water outlet section includes first horizontal section, slope drop section and second horizontal section, and the first horizontal section is equipped with baffle and guide sill, and the second horizontal section is equipped with last guide baffle, and the water outlet section side wall is equipped with the drainage outlet with pressure drainage pipeline is adapted.

[0007] Preferably, the intermediate weir is provided with a vacuum breaking side wall at both ends, and an L-shaped baffle is arranged downstream of the intermediate weir.

[0008] Preferably, the baffle is provided with a plurality of evenly spaced columns at the bottom.

[0009] Preferably, the baffle is provided with a guide sill at the rear end, and the slope drop section is arranged behind the guide sill.

[0010] Preferably, the water inlet section further comprises a plurality of flow distribution columns, which are vertically fixed to the front end of the intermediate weir, and the plurality of flow distribution columns are arranged at different intervals.

[0011] Preferably, the bottom of the water inlet section is higher than the height of the first horizontal section in the water outlet section.

[0012] Preferably, the plate wall around the drainage pool is made of integrally cast concrete.

[0013] Preferably, the last guide baffle is fixed to the front end of the drainage pipeline, and the bottom of the last guide baffle is provided with water holes at both ends.

[0014] Preferably, a cavity region is formed between the last guide baffle and the drainage pipeline.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model integrates three core energy dissipation technology means of intermediate weir, baffle and guide sill, and selectively sets flow distribution columns in the water inlet section according to the actual needs of different water flow characteristics, thereby realizing the synergistic optimization of multiple hydraulic action mechanisms. Specifically, the design fully utilizes the principles of expanding the flow section to reduce the flow rate, the water jump phenomenon to promote energy dissipation, the drop structure to enhance the turbulent effect and other principles of hydraulics, integrates various energy dissipation methods such as pick-up type energy dissipation, impact energy dissipation, vortex and turbulent energy dissipation and bottom flow type energy dissipation in one drainage pool. The structure design is compact and reasonable, which significantly improves the energy dissipation efficiency of the fluid, and provides an effective technical solution for the reliable discharge of high-speed and high-pressure wastewater.

[0017] In addition, in the design of the water outlet section, the baffle, the flow guide sill and the last-stage flow guide plate technical means are adopted, so that the pollutant removal capacity of the drainage system is further optimized. A large number of air bubbles generated in the drainage process due to air entrainment are utilized, and the air bubbles are guided to carry the pollutants in the water body to float rapidly to the water surface to form foam. The last-stage flow guide plate effectively limits the floating range of the pollutants, so that the pollutants are concentrated before the last-stage flow guide plate, and the operator can clean up in time. This design reduces the pollutants entering the sea outfall pipeline with the drainage, effectively reduces the risk of pipeline blockage and operation failure caused by the accumulation of pollutants, and thus significantly improves the operation stability and environmental protection performance of the system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structural schematic view of a new energy dissipation drainage tank suitable for introducing gravity flow into the water inlet section, wherein (a) is a perspective view, and (b) is a plan view;

[0019] Figure 2 A structural schematic view of a new energy dissipation drainage tank suitable for introducing high-speed jet flow into the water inlet section, wherein (a) is a perspective view, and (b) is a plan view;

[0020] The components represented by the numbers in the figure are listed as follows: 1, drainage chamber; 2, water inlet pipeline; 3, drainage pipeline; 4, flow distribution column; 5, intermediate weir; 6, vacuum breaking wall; 7, baffle; 8, flow guide sill; 9, last-stage flow guide plate; 10, water passage hole; 11, water inlet section; 12, water outlet section; 121, first horizontal section; 122, inclined downward section; 123, second horizontal section; 13, column. DETAILED DESCRIPTION

[0021] In order to more clearly and completely show the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved, the technical solutions of the embodiments will be further described in detail below with reference to the drawings of the utility model. It should be understood that the specific embodiments described herein are only a part of the embodiments of the utility model, and are not limited to the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] As Figure 1 , Figure 2As shown, the present embodiment provides a new energy dissipation drainage tank, which comprises a drainage chamber 1, a water inlet pipeline 2, a drainage pipeline 3 and an intermediate weir 5; the intermediate weir 5 is vertically fixed in the drainage chamber 1 and divides the drainage chamber 1 into a water inlet section 11 and a water outlet section 12. The side wall of the water inlet section 11 is provided with a water inlet port matched with the pressure water inlet pipeline 2; the water outlet section 12 comprises a first horizontal section 121, a slope drop section 122 and a second horizontal section 123, the first horizontal section 121 is provided with a baffle plate 7 and a flow guide sill 8, the second horizontal section 123 is provided with a final flow guide plate 9 and the drainage pipeline 3, the final flow guide plate 9 is fixed at the front end of the drainage pipeline 3, the bottom of the final flow guide plate 9 is provided with water passing holes 10 at both ends, and the side wall of the water outlet section 12 is provided with a drainage port matched with the pressure drainage pipeline 3.

[0023] In the present embodiment, the plate wall around the drainage tank is made of integrally cast concrete. The water inlet section 11 is mainly used for energy dissipation, while maintaining the required back pressure or water level of the upstream process system; the water outlet section 12 is mainly used for energy dissipation, promoting air floatation, and providing appropriate storage capacity to cope with the water level changes caused by the start and stop of the system. Specifically, when the water inlet flow is gravity flow, such as Figure 1 As shown, the water flow enters the water inlet section through the pressure water inlet pipeline 2, and by limiting the water inlet flow rate of the water inlet pipeline, the required back pressure of the upstream process system is provided, further reducing the formation of turbulence and turbulence in the water inlet section 11. When the water level in the water inlet section 11 rises to the height of the intermediate weir 5, the water flow can overflow to the water outlet section 12 and drop energy dissipation through the intermediate weir 5. The intermediate weir 5 is provided with a vacuum breaking side wall 6 at both ends, which on the one hand avoids the phenomenon of vacuum caused by the continuous removal of air by the water flow over the weir, thereby preventing the instability of the weir surface caused by the alternating action of positive and negative pressure, and on the other hand effectively prevents the damage to the weir surface structure caused by the cavitation phenomenon.

[0024] An L-shaped baffle plate 7 is first arranged downstream of the intermediate weir 5, the bending direction of the lower end of the baffle plate 7 is towards the water inlet section 11 side; the bottom is supported by a plurality of columns 13, and the plurality of columns 13 are uniformly and spacedly arranged. The water flow falling through the intermediate weir 5 is subjected to the combined action of impact energy dissipation and friction energy dissipation by the baffle plate 7, and on the other hand, a high turbulence is generated after being blocked by the baffle plate 7. Due to the irregularity of the turbulence, the energy of the water flow is converted into the kinetic energy of the vortex flow, and at the same time, the internal mixing and diffusion of the fluid occur continuously, thereby significantly reducing the flow rate and pressure of the water flow. In addition, the arrangement of the baffle plate 7 effectively hinders the large amount of air bubbles generated by the water flow when falling from flowing downstream, and promotes the rapid rising, release and rupture of larger air bubbles in a limited space, further dissipating and dispersing the energy of the falling water flow, enhancing the energy dissipation effect.

[0025] The back end of the baffle plate 7 is provided with a flow guide sill 8. The water flow blocked by the baffle plate flows through the bottom of the baffle plate 7 to the downstream, and generates a local water jump phenomenon when passing through the flow guide sill 8, thereby reducing the flow energy of the water flow. At the same time, the remaining air in the water body, especially the small bubbles, is dragged downstream by the water flow. These small bubbles carry suspended pollutants through the air floatation effect, and are guided by the flow guide sill 8 to promote the rapid floating to the water surface to form foam. The floating flow of the pollutants is limited before the last flow guide plate 9, which is convenient for the operator to clean in time. This design effectively reduces the concentration of pollutants in the sea discharge wastewater, and avoids the problems of pipe blockage and failure caused by a large amount of pollutants.

[0026] The back end of the flow guide sill 8 is a slope descending section 122, which fully utilizes the slow-flowing slope to reduce the flow velocity of the water flow, thereby further reducing the excess energy in the water body, effectively reducing the impact force of the water flow, significantly shortening the length requirement of the subsequent drainage tank, saving the engineering layout space, and optimizing the overall space utilization rate of the drainage tank.

[0027] The second horizontal section 123 in the water outlet section 12 is provided with a last flow guide plate 9 arranged vertically, and the two ends of the bottom of the last flow guide plate 9 are provided with water passing holes 10 with the same size. The water flow passes through the water passing holes 10 at the bottom of the slope descending section 122, enters the back end of the last flow guide plate 9, and is finally discharged through the drainage pipeline 3. The last flow guide plate 9 not only blocks and consumes the last excess energy in the water body, but also prevents most of the bubbles from flowing backward, and forms a relatively calm and air-free flowing area between the last flow guide plate 9 and the drainage pipeline 3, which provides appropriate storage capacity for the drainage tank to cope with the water level change caused by the start and stop of the system, and avoids the water hammer phenomenon caused by the air entering the drainage pipeline.

[0028] In particular, as shown in Figure 2 When the water inlet section 11 introduces a high-speed jet flow, a plurality of flow distribution columns 4 can be arranged vertically and fixed in front of the intermediate weir 5 in the water inlet section 11, and the plurality of flow distribution columns are unevenly arranged. The high-speed water flow is blocked and guided by the column body, which has the effects of energy dissipation and redistribution of water flow, effectively avoiding the problem that the uneven distribution of water flow caused by the jet flow directly passing through the intermediate weir 5 causes local congestion or excessive scouring, thereby affecting the drainage efficiency and even causing damage to the system structure. It should be noted that when the water inlet is a gravity flow, the flow distribution column 4 does not need to be arranged.

[0029] In summary, the utility model provides a kind of novel energy dissipation drainage pool, by comprehensive use intermediate weir 5, baffle 7, guide sill 8 etc., utilize enlarged flow section to reduce flow velocity, water jump action phenomenon promotes energy dissipation, drop structure enhances turbulent effect etc., various hydraulic action mechanisms, pick up flow type energy dissipation, impact energy dissipation, vortex and turbulent energy dissipation and bottom flow type energy dissipation etc. Many energy dissipation modes are integrated in a drainage pool, layout is compact, structure design is flexible, reasonable, significantly improve the energy dissipation efficiency of fluid, ensure that water flow is smooth in the process of drainage, improve the operation efficiency and stability of entire drainage pool, and effectively reduce the floor area, reduce engineering investment cost. Inlet section 11 can selectively set flow distribution column 4, applicable to different water flow characteristics, meet the needs of different seawater desalination engineering working condition. Meanwhile, by using baffle 7, guide sill 8 and last-stage guide plate 9 technical means in outlet section 12, utilize the large amount of air bubbles generated in the process of water discharge due to air entrainment, guide air bubble to carry a large amount of pollutants in water body to float rapidly to water surface, form foam, and limit the flow of pollutants before last-stage guide plate 9, facilitate operator to clean in time, reduce the pollutant concentration in sea discharge wastewater, maximum limit reduces the negative influence on marine ecological environment, avoid the blockage and operation failure of sea discharge pipeline due to pollutant accumulation, the design effectively solves the problem of inconvenient cleaning, high cleaning cost of drainage pool, guarantees the safe and stable operation of drainage pool.

Claims

1. A novel energy-dissipating drainage tank, characterized in that, It includes a drainage chamber (1), an inlet pipe (2), a drainage pipe (3), and an intermediate weir (5); the intermediate weir (5) is vertically fixed inside the drainage chamber (1), and the intermediate weir (5) divides the drainage chamber (1) into an inlet section (11) and an outlet section (12); the side wall of the inlet section (11) is provided with an inlet adapted to the pressure inlet pipe (2); the outlet section (12) includes a first horizontal section (121), a slope descending section (122), and a second horizontal section (123), the first horizontal section (121) is provided with a baffle plate (7) and a guide sill (8), the second horizontal section (123) is provided with a final stage guide plate (9), and the side wall of the outlet section (12) is provided with a drain outlet adapted to the pressure drainage pipe (3).

2. The novel energy dissipation drainage tank according to claim 1, characterized in that, The intermediate weir (5) is provided with vacuum breaking sidewalls (6) at both ends, and an L-shaped baffle (7) is provided downstream of the intermediate weir (5).

3. The novel energy dissipation drainage tank according to claim 1, characterized in that, The lower end of the baffle (7) is bent toward the water inlet section (11); multiple columns (13) are arranged at even intervals at its bottom.

4. The novel energy dissipation drainage tank according to claim 1, characterized in that, The baffle (7) is provided with a guide sill (8) at its rear end, and the section behind the guide sill (8) is a ramp descent section (122).

5. The novel energy dissipation drainage tank according to claim 1, characterized in that, The inlet section (11) also includes multiple flow distribution columns (4), which are vertically fixed at the front end of the intermediate weir (5) and are arranged at uneven intervals.

6. The novel energy dissipation drainage tank according to claim 1, characterized in that, The bottom height of the inlet section (11) is higher than the height of the first horizontal section (121) within the outlet section (12).

7. The novel energy dissipation drainage tank according to claim 1, characterized in that, The drainage chamber (1) is surrounded by a panel wall made of integral cast concrete.

8. The novel energy dissipation drainage tank according to claim 1, characterized in that, The final stage guide plate (9) is fixed to the front end of the drainage pipe (3), and water passage holes (10) are provided at both ends of its bottom.

9. The novel energy dissipation drainage tank according to claim 8, characterized in that, A cavity region is formed between the final stage guide plate (9) and the drainage pipe (3).

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