CN111359302B

CN111359302B - Sewage pretreatment equipment for pipe flow power generation

Info

Publication number: CN111359302B
Application number: CN202010157593.8A
Authority: CN
Inventors: 柏转; 孙小庆; 胡俊; 张慧; 邹慧; 邓硕哲; 单云
Original assignee: Donghua University
Current assignee: Donghua University
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2021-04-20
Anticipated expiration: 2040-03-09
Also published as: CN111359302A

Abstract

The invention discloses sewage pretreatment equipment for pipe flow power generation, which comprises an overflow type multistage filtering water collection tank annular inclined plate contact strengthened sedimentation water chamber, N annular inclined plate contact strengthened sedimentation water chambers connected with corresponding overflow pipes, a magnetic combined type water sealing plug drainer, and a water outlet at the bottom of the magnetic combined type water sealing plug drainer is connected with an air suction acceleration pipeline. The invention can be built in various high-rise buildings to realize the filtration, sedimentation, transmission and acceleration of domestic sewage, and can generate electricity through the turbine accessory modules connected downwards, thereby effectively collecting and utilizing the hydraulic potential energy of high-level water bodies and exerting considerable economic value. After being filtered and settled, the sewage is sprayed out through a drainer to reach an air suction acceleration pipeline, and then the potential energy of water flow is utilized to achieve the purpose of power generation pretreatment with fully accelerated pipe flow.

Description

Sewage pretreatment equipment for pipe flow power generation

Technical Field

The invention relates to sewage pretreatment equipment for pipe flow power generation, and belongs to the technical field of water treatment equipment.

Background

The scholars indicate that: to date, the potential of hydroelectric power generation in the world has only been exploited by 13.6%. A new small hydroelectric power plant was published in 1982 in the united states as a floating structure with air and ballast chambers, dc diffusers, water turbines and generators housed in the cavity. The whole device is arranged on a runner (a water discharge hole, a sluice, a channel and the like of an overflow dam) for power generation. The japan steed electrical machinery company has developed a subminiature kilogram level runoff water power generation device which can be used as a power source for general households in mountains or fish farms, etc., and is helpful for plants to generate electricity by using drainage to realize energy saving, and this type of small-sized generator is mainly of 10 to 20kW level. On the basis, a student develops two products of 0.5kW and 1kW, which are composed of a permanent magnet power generation device, a battery pack, a control device with an inverter and the like, and only water with the volume of more than 2L/s is needed. The japan economic industry province carries out fundamental investigations about potential power generation capacity of industrial water. Facilities for delivering water from an upstream reservoir or the like to various enterprises through pipelines by using industrial water pipelines are expected as potential energy sources of hydraulic energy and are not utilized at present.

The scheme mainly comprises a high dam reservoir, a siphon pipe, a main flow pipe, an axial flow type generator, an impact type hydroelectric generator and a deep well pump, wherein the siphon type hydroelectric generator is provided by civilization and the like in China (patent number: CN209067405U), a siphon type hydroelectric generation system provided by dishequer faithfully (patent number: CN107435611A), a high dam hydropower station siphon type hydroelectric generation system provided by Zhuanxin (patent number: CN106836155A) and a siphon type generating system provided by Kyowa and the like (patent number: CN 206092277U). A plurality of axial flow type generators are arranged on the main flow pipe in a stepped mode, an impact type hydroelectric generator is arranged at the bottom end of the main flow pipe, kinetic energy stored by reservoir height is converted into electric energy, and siphon type hydroelectric generation is achieved. The pipeline in the solution can be foreseen as a large diameter pipeline, which requires a large volume of water. Furthermore, the use of a multistage axial flow generator increases water resistance and increases on-way flow velocity loss, which exposes limitations in attempting to achieve power generation through multistage utilization. In addition, a sewage siphon power generation device (patent No. CN104251180A) proposed by Okakoku et al considers a metal surface plastic protective layer contacting with sewage in a sewage siphon power generation device, but does not specifically consider the complexity of the water body, taking into consideration the fact that the inner bearing device is lubricated with clean water by directly utilizing the water flow of the sewage flowing in the siphon. The relevant theory for sewage filtration and sedimentation has been mentioned in the prior patent art, but the structure in the prior art is too complex in design, inconvenient in design and manufacture and in use, and the too dense structure adds difficulty to the logistics maintenance. Further, in the conventional pipe flow acceleration technique, there are an air column method in which a spiral rib is built, and a water jet method which is a common method. The initial velocity of the water stream plays a crucial role in the water jet principle, and the acceleration of the water stream by the water jet method is difficult to achieve with a pipe flow having a relatively low initial velocity. Therefore, it is necessary to design a device which has a convenient and orderly internal structure and is suitable for power generation under the conditions and the maintenance difficulty can be reduced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the existing sewage pretreatment equipment has the problems of poor adaptability in multiple occasions and too frequent logistics maintenance.

In order to solve the technical problem, the technical scheme of the invention is realized as follows:

a sewage pretreatment apparatus for pipe flow power generation, comprising:

the overflow type multi-stage filtering water collecting tank is internally provided with a water inlet area, a water collecting area and a sludge area from top to bottom in sequence, a filtering cover is arranged between the water inlet area and the water collecting area, a sewage isolating disc is arranged between the water collecting area and the sludge area, the bottom of the sludge area is provided with a sewage outlet, and the end part of the sewage outlet is provided with a decontamination sealing cover; a flow guide pipe is arranged in the sludge area, the upper end of the flow guide pipe penetrates through the sewage isolation disc to be communicated with one port of the N through pipe, a filter element is arranged in the flow guide pipe, other ports of the N through pipe are respectively connected with an overflow pipe, and the outlet end of the overflow pipe is exposed out of the overflow type multistage filtering water collection tank;

the upper end of the water injection pipe is exposed out of the top of the annular inclined plate contact enhanced settling water chamber, and the lower end of the water injection pipe extends to the lower part of the annular inclined plate contact enhanced settling water chamber and is fixed with the inner wall of the annular inclined plate contact enhanced settling water chamber through a spoiler; the upper part of the annular inclined plate contact reinforced settling water chamber is provided with at least one water outlet, and a water inlet at the upper end of the water injection pipe is communicated with the overflow pipe; the bottom of the annular inclined plate contact reinforced settling water chamber is provided with a sewage draining outlet, and the end part of the sewage draining outlet is provided with a sewage draining end cover; the middle part of the annular sloping plate contact strengthened settling water chamber is provided with an annular sloping plate, and the annular sloping plate is fixed with the inner wall of the annular sloping plate contact strengthened settling water chamber through an annular suspension;

the magnetic suction type water sealing plug drainer is characterized in that a drainer water inlet is formed in the middle of the magnetic suction type water sealing plug drainer, and water outlets of all annular inclined plates in contact with the reinforced settling water chamber are communicated with the drainer water inlet; the top of the magnetic attraction type water sealing plug drainer is provided with a dustproof box cover, the dustproof box cover is connected with a water sealing plug at the bottom through two thin guide rods, a small iron block is embedded at the bottom of the water sealing plug and fixed at the bottom of the water sealing plug through a fastening screw cover, the bottom of the magnetic attraction type water sealing plug drainer is provided with a water outlet, and the outer edge of the water outlet is sleeved with a magnet ring matched with the small iron block; the water outlet is connected with the air suction accelerating pipeline.

Preferably, a tank cover is arranged at the top of the overflow type multi-stage filtering water collecting tank; the bottom is conical.

Preferably, the filter cover is provided with water permeable holes distributed densely at the lower part and the upper part, and the edges of the filter cover are overlapped on the inner side wall of the water collecting area through flange edges; the N-shaped through pipe is connected with the filter cover through a cleaning rod.

Preferably, a two-stage conical filter element is arranged in the filter pipe.

Preferably, the aperture of the hole on the dirt-separating disc is smaller than that of the hole on the filter cover.

Preferably, the top of the annular inclined plate contact reinforced settling water chamber is provided with a large sealing end cover; the lower part is hemispherical; the water outlet of the annular sloping plate contact reinforced settling water chamber is connected with a bent pipe joint.

Preferably, the larger the radius of the annular inclined plate contacting the enhanced settling chamber, the larger the inclination angle of the annular inclined plate from the radius.

Preferably, the thin guide rod is connected with the water sealing plug through a limiting nut.

Preferably, the air suction acceleration pipeline comprises an acceleration nozzle, a negative pressure pipe and a spiral rib pipeline which are connected in sequence, and a water outlet of the magnetic suction combined type water sealing plug drainer is communicated with the acceleration nozzle through a siphon pipeline; one end of the negative pressure pipe connected with the accelerating nozzle is provided with an air suction hole.

Compared with the prior art, the invention has the beneficial effects that: the device can be built in various high-rise buildings to realize the filtration, sedimentation, transmission and acceleration of rain/sewage, and generates electricity through the lower connected turbine unit module, thereby effectively collecting and utilizing the hydraulic potential energy of high-level water and leading the high-level water to play considerable economic value. After being filtered and settled, the sewage is sprayed out through a drainer to reach an air suction acceleration pipeline, and then the potential energy of water flow is utilized to achieve the purpose of power generation pretreatment with fully accelerated pipe flow.

Drawings

Fig. 1 is a schematic structural view of a sewage pretreatment apparatus for pipe flow power generation provided by an embodiment;

fig. 2 is a top view of a sewage pretreatment apparatus for pipe flow power generation provided in an embodiment;

FIG. 3 is a schematic view of an overflow type multistage filtering water collecting tank and an annular inclined plate contact reinforced settling water chamber;

FIG. 4 is a schematic structural view of an overflow type multi-stage filtration header tank;

FIG. 5 is a schematic structural diagram of an N-tube;

FIG. 6 is a partial cross-sectional view of a draft tube;

FIG. 7 is a schematic structural view of an annular inclined plate contact strengthened settling water chamber;

FIG. 8 is a schematic structural view of an annular sloping plate;

FIG. 9 is a schematic structural view of an annular swash plate and an annular suspension;

FIG. 10 is a schematic view of a magnetic attraction type water sealing plug drainer;

FIG. 11 is a perspective view of a magnetic snap-in water-seal plug drainer;

FIG. 12 is a partial cross-sectional view of a magnetic closure drain;

FIG. 13 is a schematic view of the structure of the suction acceleration pipe;

fig. 14 is a partial sectional view of a suction acceleration pipe.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Examples

As shown in fig. 1, the sewage pretreatment equipment for pipe flow power generation provided by the present invention mainly comprises an overflow type multistage filtration water collection tank 1, an annular inclined plate contact enhanced settling water chamber 2, a magnetic attraction type water sealing plug water drain device 3, and an air suction acceleration pipeline 4.

As shown in fig. 3 and 4, a water inlet is arranged above the overflow type multi-stage filtering water collecting tank 1, and four five-way water outlets are arranged in the middle of the overflow type multi-stage filtering water collecting tank. The inside from the top down of overflow formula multiple stage filtration header tank 1 is equipped with respectively: the device comprises a filter cover 7, a cleaning rod 6, a five-way pipe 8, a flow guide pipe 9, an overflow pipe 10, a dirt-isolating disc 11 and a conical filter element 12; externally: the upper part is provided with a box cover 5, and the lower part is provided with a decontamination sealing cover 13. When sewage is continuously injected from the water inlet pipe on the box cover, water flow firstly reaches the central area of the filter cover 7, hair, clothes, cotton fibers and the like in water are easy to form larger dirt group components, the central area of the filter cover 7 is free of a water permeable hole structure, and the water flow downwards flows from the water permeable holes on the conical inclined surface of the filter cover 7. And a sewage separation disc 11 is also arranged on the flow guide pipe 9 below the filter cover 7, and a pore structure smaller than the water permeable pores on the filter cover 7 is arranged on the sewage separation disc 11. A part of the floating material remaining in the water flow will be caught on the dirt-separating disc 11.

In fig. 5, the screw thread of the lower part of the cleaning rod 6 is respectively connected with the boss hollow structures of the filter cover 7 and the five-way pipe 8, the overflow pipe 10 is installed in four water outlets in the middle of the overflow type multistage filtering water collecting tank 1, one end of the overflow pipe is connected with the five-way pipe 8, and the other end of the overflow pipe is connected with the quick coupling. When needs clearance overflow formula multistage filtration header tank 1, only need unscrew the screw thread between overflow pipe 10 and the five-way pipe 8, all take out with regard to the clean pole 6 of accessible the inside part of overflow formula multistage filtration header tank 1, later open the scrubbing closing cap 13, can clear away the filth that is amasss up in overflow formula multistage filtration header tank 1 bottom, played the effect of quick convenient maintenance.

In fig. 6, the outer end of the flow guide pipe 9 is respectively connected with the dirt-separating disc 11 and the water inlet of the five-way pipe 8 in a matching manner, and the dirt-separating disc 11 and the water inlet of the five-way pipe 8 are limited. Two stages of conical filter elements 12 are embedded in the flow guide pipe 9, and the filter elements are conical round tables with simple structures and two open ends, but the structure can effectively reduce the movement speed of floating objects in the water body, thereby playing the functions of gathering the floating objects and settling and filtering. When water flow falls into the bottom of the overflow type multi-stage filtration water collection tank 1 through the dirt separation disc 11, the water level is continuously increased, and in the figure 4, one end of the guide pipe 9 is provided with a water permeable hole cylindrical surface with a certain length. The water level in the draft tube 9 rises along with the rise of the upper water surface until the upper water surface submerges the five-way tube, and the water flow in the draft tube 9 enters the five-way tube and flows to the four outlets and is injected into the annular inclined plate contact strengthened settling water chamber 2 through the overflow tube 10.

As shown in fig. 3 and 7, the water flows through the quick connector and is first collected at the bottom of the settling water chamber through the water injection pipe 15 of the annular inclined plate contact reinforced settling water chamber 2. The external part of the annular sloping plate contact strengthened settling water chamber 2 is provided with a large sealing end cover 14, an elbow joint 20 and a sewage discharge end cover 19, and the internal part is provided with a flow baffle plate 18, a water injection pipe 15, an annular suspension 16 and three different types of annular sloping plates 17. The water flowing out of the water injection pipe 15 will create a dynamic fluid environment with downward movement of fluid in a certain central area due to the distribution of the flow velocity, and the fluid will surge upward at the edge. At this time, the flow rate of the water flow is reduced due to the water permeable holes of the flow blocking plate 18. When the water flow gradually rises into the area shown in fig. 8, the water flow passes through the annular inclined plate 17 with the cross section of the lower end being parallel to the cross section of the upper end and being obliquely enlarged, floating floccules still remaining in the water body are agglomerated and heavy due to the enhanced contact sedimentation effect, and finally fall down.

Referring to fig. 9, the spoiler 18 and the annular suspension 16 are both installed at the lower and middle portions of the water injection pipe 15 by threads, and the radius and the inclination angle of the annular swash plate 17 are also continuously increased to gradually increase the flow cross section. Due to the negative pressure generated by the water injection of the water injection pipe 15, the water body in the central area of the upper part of the spoiler will have a tendency of passing through the water permeable holes in the central area of the spoiler and falling to the bottom of the annular inclined plate contact enhanced settling water chamber 2. Therefore, the dynamic sedimentation function of the water body can be completed through the internal structure of the annular inclined plate contact reinforced sedimentation water chamber 2. Gradually, after a period of use, the flocculated sediment falling to the bottom of the closed water chamber can be discharged only by opening the drain end cover 19. Finally, the water flowing out of the annular sloping plate 17 is collected into the magnetic combined water-sealing plug drainer 3 through the hose connected with the elbow joint 20.

As shown in fig. 2, 10, and 11, the water outlets of all the annular sloping plates contacting the strengthened settling water chamber 2 (in this embodiment, four annular sloping plates contacting the strengthened settling water chamber 2, and each annular sloping plate contacting the water outlet of the strengthened settling water chamber 2) are connected to one water stop valve, and two water stop valves are connected to one of the two water inlets of the magnetic closing plug water drainer 3 through a three-way connection. The upper part of the magnetic attraction type water sealing plug drainer 3 is provided with a dustproof box cover 21, the dustproof box cover 21 is provided with two smooth through holes for the reciprocating motion of a thin guide rod 23, the lower end of the thin guide rod 23 is fixedly provided with a water sealing plug 25 through two limiting nuts 24, and water flow (in the arrow direction in figure 2) flows to a drainer water inlet 22 through a pipeline. Since the lower end of the water seal plug 25 is provided with a small iron block 26 by a fastening screw cap 27, a magnet ring 28 is provided at the outer end of the outlet of the drain and above the siphon pipe 29 as shown in fig. 12. When the water quantity in the drainer is small, the water sealing plug 25 and the thin guide rod 23 fall to the lowest position and block the water outlet due to the action of gravity. And the attraction force of the water sealing plug 25 at the water sealing position is the largest due to the action of the magnetic force. When the water level rises gradually, although the water sealing plug can be subjected to the action of buoyancy, the buoyancy is not enough to offset the resultant force of the gravity of each part and the magnetic attraction force. The thin guide rod 23 and the water sealing plug 25 are both made of floatable materials, the buoyancy borne by the buoyancy parts (the thin guide rod, the water sealing plug and the like) is increased by the rising water surface height, and when the water surface rises to a designed water level, the upward buoyancy is larger than the downward resultant force, so that the suction force of the magnet ring 28 is overcome, and the water sealing plug 25 quickly floats along the through hole along with the thin guide rod 23. At this time, a siphon pressure difference is formed between the lower end of the siphon pipe 29 as shown in fig. 1 and the upper water surface inside the drainer, and the siphon pressure difference pushes the water to be drained quickly. The magnetic attraction force is reduced sharply the farther the small iron block 26 is from the magnet ring 28, so that the water is not sealed again. The buoyancy part gradually falls along with the upper water surface and seals the water outlet again when the water body is close to the clear water. And then the above rule is repeated circularly.

As shown in fig. 13 and 14, the pipe flow ejected through the siphon line 29 enters the suction acceleration line 4 after passing through a falling distance, and the suction acceleration line 4 includes: the accelerating spray head 30, the negative pressure pipe 31 and the spiral rib pipeline 32, wherein the negative pressure pipe is provided with an air suction hole 33, the accelerating spray head 30 is provided with a nozzle with a contracted section, and the pipe flow can be accelerated by utilizing the continuity condition of fluid. The negative pressure pipe 31 is connected to the lower end of the acceleration nozzle 30, but includes a nozzle, and is configured as shown in fig. 14. The accelerated tube flow causes a negative pressure region smaller than the external atmospheric pressure to be generated in the region above the nozzle opening in the negative pressure tube 31, thereby continuously sucking air from the suction hole by using this effect. The air in the suction pipe flow will further form bubbles, entrained in the water flow and falling down together. The lower end of the negative pressure pipe 31 in the figure is provided with a spiral rib pipeline 32, and the spiral rib pipeline has the function of generating centrifugal effect of rotating and falling. So, can combine together the spiral rib pipeline among water jet principle and the prior art, make the bubble in the pipe flow separate out under rotatory centrifugal action, form more stable air column in the pipeline to reach more effective whereabouts and accelerate the function.

In conclusion, the invention solves the problems of difficult power generation treatment of domestic sewage, unclear equipment manufacturing model and frequent logistics maintenance by carrying out assembly convenient design on the water channel and the pipeline of the sewage pretreatment equipment.

Claims

1. A sewage pretreatment apparatus for pipe flow power generation, comprising:

the overflow type multi-stage filtering water collecting tank (1) is internally provided with a water inlet area, a water collecting area and a sludge area from top to bottom in sequence, a filtering cover (7) is arranged between the water inlet area and the water collecting area, a dirt separating disc (11) is arranged between the water collecting area and the sludge area, the bottom of the sludge area is provided with a sewage draining outlet, and the end part of the sewage draining outlet is provided with a dirt removing sealing cover (13); a flow guide pipe (9) is arranged in the sludge area, the upper end of the flow guide pipe (9) penetrates through a sewage isolation disc (11) to be communicated with one port of the N through pipe, a filter element (12) is arranged in the flow guide pipe (9), other ports of the N through pipe are respectively connected with an overflow pipe (10), and the outlet end of the overflow pipe (10) is exposed out of the overflow type multi-stage filtering water collection tank (1);

the water injection pipes (15) are arranged in the annular inclined plate contact strengthened settling water chambers (2), the upper ends of the water injection pipes (15) are exposed out of the tops of the annular inclined plate contact strengthened settling water chambers (2), and the lower ends of the water injection pipes extend to the lower portions of the annular inclined plate contact strengthened settling water chambers (2) and are fixed with the inner walls of the annular inclined plate contact strengthened settling water chambers (2) through flow baffles (18); the upper part of the annular sloping plate contact reinforced settling water chamber (2) is provided with at least one water outlet, and a water inlet at the upper end of the water injection pipe (15) is communicated with the overflow pipe (10); the bottom of the annular sloping plate contact reinforced settling water chamber (2) is provided with a sewage draining outlet, and the end part of the sewage draining outlet is provided with a sewage draining end cover (19); the middle part of the annular sloping plate contact strengthened settling water chamber (2) is provided with an annular sloping plate (17), and the annular sloping plate (17) is fixed with the inner wall of the annular sloping plate contact strengthened settling water chamber (2) through an annular suspension (16);

the magnetic suction type water sealing plug drainer (3) is characterized in that the middle of the magnetic suction type water sealing plug drainer (3) is provided with a drainer water inlet (22), and the water outlets of all annular inclined plates in contact with the intensified settling water chamber (2) are communicated with the drainer water inlet (22); the top of the magnetic attraction type water sealing plug drainer (3) is provided with a dustproof box cover (21), the dustproof box cover (21) is connected with a water sealing plug (25) at the bottom through two thin guide rods (23), the bottom of the water sealing plug (25) is embedded with a small iron block (26), the small iron block (26) is fixed at the bottom of the water sealing plug (25) through a fastening screw cover (27), the bottom of the magnetic attraction type water sealing plug drainer (3) is provided with a water outlet, and the outer edge of the water outlet is sleeved with a magnet ring (28) matched with the small iron block (26); the water outlet is connected with an air suction acceleration pipeline (4).

2. The sewage pretreatment apparatus for pipe flow power generation according to claim 1, wherein a tank cover (5) is provided on the top of the overflow type multistage filtering header tank (1); the bottom is conical.

3. The sewage pretreatment apparatus for pipe flow power generation according to claim 1, wherein the filter cover (7) is provided with water permeable holes distributed densely at the lower part and the edge thereof is overlapped on the inner side wall of the water collection area by a flange; the N through pipe is connected with a filter cover (7) through a cleaning rod (6).

4. The wastewater pretreatment apparatus for pipe flow power generation according to claim 1, wherein the filter element (12) is a two-stage conical filter element.

5. Sewage pretreatment apparatus for pipe flow power generation according to claim 1, characterized in that the aperture of the holes of the dirt-separating disc (11) is smaller than the aperture of the holes of the filter housing (7).

6. The sewage pretreatment apparatus for pipe flow power generation according to claim 1, wherein a large end sealing cover (14) is provided on the top of the annular inclined plate contact enhanced settling water chamber (2); the lower part is hemispherical; the water outlet of the annular sloping plate contact reinforced settling water chamber (2) is connected with a bent pipe joint (20).

7. The sewage pretreatment apparatus for pipe flow power generation according to claim 1, wherein the thin guide rod (23) is connected to the water sealing plug (25) through a limit nut (24).

8. The sewage pretreatment apparatus for pipe flow power generation according to claim 1, wherein the suction acceleration pipe (4) comprises an acceleration nozzle (30), a negative pressure pipe (31) and a spiral rib pipe (32) which are connected in sequence, and a water outlet of the magnetic suction type water-sealing plug drainer (3) is communicated with the acceleration nozzle (30) through a siphon pipe (29); one end of the negative pressure pipe (31) connected with the accelerating nozzle (30) is provided with an air suction hole (33).