CN114797194A

CN114797194A - Virtual pool bottom, separation method and double-cyclone separator based on virtual pool bottom

Info

Publication number: CN114797194A
Application number: CN202210372097.3A
Authority: CN
Inventors: 贺诚
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-07-29

Abstract

The invention discloses a virtual pool bottom, a separation method and a double cyclone separator based on the virtual pool bottom, wherein the double cyclone separator comprises a shell, a conical flow divider and a cyclone grid plate, the bottom of the shell is provided with a sediment storage cavity, the conical flow divider is in an inverted cone shape and is arranged in the shell, and a channel opening is formed in the conical surface of the conical flow divider; the space between the inner wall of the shell and the outer wall of the conical flow divider is a lower swirling flow sediment cavity, and the space inside the conical flow divider is an upper swirling flow sediment cavity; the cyclone grid plate is provided with a plurality of through holes and a central hole and is positioned at the bottom of the conical flow divider, and the lower end of the conical flow divider is communicated with the sediment storage cavity through the central hole. The cyclone grid plate used based on the virtual pool bottom technology solves the problem that particles in a sedimentation pool are taken away again by water flow after falling to the pool bottom, and simultaneously, the processing space is utilized to the maximum extent, so that the particle removing efficiency of the separator is improved; the invention has small occupied area, does not need external power or energy, is convenient to clean and is easy to maintain.

Description

Virtual pool bottom, separation method and double-cyclone separator based on virtual pool bottom

Technical Field

The invention relates to a virtual pool bottom, a separation method and a double-cyclone separator based on the virtual pool bottom, belonging to the technical field of sewage treatment and environmental protection.

Background

Because of the influence of factors such as large-scale urban construction and imperfect pipe networks in China, the sand content of sewage is generally high, and if a large amount of sand enters each subsequent treatment unit, a great deal of hidden troubles are brought to the normal operation of a sewage plant. The grit removal tank that is currently in common use includes: horizontal flow grit chambers, aeration grit chambers, spiral flow grit chambers (Belleville, Germany and Bischner, USA), and the like. Horizontal flow grit chambers, aerated grit chambers and other conventional grit chambers have been gradually replaced by more volume-advantageous spiral-flow grit chambers. However, although the cyclone sand basin is a technology introduced in recent years, in practical applications, it is generally found that there is a significant difference between the particle removal efficiency and the index declared by the manufacturer, thereby often causing damage to the sewage treatment equipment and the sewage treatment plant to be unable to operate normally. The main reason why the particle removing equipment cannot meet the actual application requirement is the performance problem of the particle removing equipment except the conscious misleading of manufacturers, the grit chambers of different types have very strict requirements on the control of inflow flow rate, the grit chambers have direct and important influence on the stability and effect of treatment, and the sewage inflow rate of a common sewage treatment plant always has certain uncontrollable fluctuation in the actual operation. However, even if the required operating conditions are met, the particle removal effect often falls short of the actual requirements. The continuous pursuit of the industry is to find new sand removing technology and equipment which are more energy-saving, carbon-reducing, stable, efficient, small, reliable and more in line with the national conditions.

Patent No. 2021108473380 discloses a non-powered cyclone claw solid-liquid separator, which is excellent in particle removal efficiency and other properties, but is more suitable for treatment of rainwater runoff due to its complicated structure and difficult cleaning, rather than being particularly suitable for treatment of sewage because of the large amount of organic matter contained in the sewage.

Disclosure of Invention

In order to solve the technical problems, the invention provides a virtual pool bottom and a separation method, and a double-cyclone separator based on the virtual pool bottom, and the specific technical scheme is as follows:

a virtual pool bottom, comprising: the water-saving artificial wetland system is a virtual pond bottom formed by splicing at least one basic unit structure which is a rotational flow grid plate, wherein the rotational flow grid plate is provided with a plurality of through holes, and the rotational flow grid plate is laid on the bottom of an actual pond bottom and can divide a water body into an upper water area and a lower water area.

The virtual pool bottom divides the water body into an upper water area and a lower water area, and can promote the sedimentation of suspended particles in the water from multiple aspects. First, when water in the upper water area flows over its upper surface, a swirling flow is generated in its through-holes, thereby accelerating particles near the panel to enter the lower water area through the through-holes. And secondly, the panel can weaken the disturbance of the upper water body to the lower water body, and is favorable for the suspended particles entering the lower water body to continue to precipitate. Meanwhile, the possibility that the particles are washed away again after falling to the bottom of the pool is greatly reduced.

In fact, the cyclone grid plate can adopt a plane or non-plane structure, the caliber of the upper hole and the caliber of the lower hole of the through hole arranged on the plate are not required to be the same, and the size, the thickness and the size of the through hole have no special requirements and are determined by specific application. The shape and orientation of the perforations may also be selected as appropriate, and the shape and orientation of the perforations may be different on the same or different perforated-hole panels. Although these parameters will affect the function and effect of the virtual bottom, the basic principle is the same, so the virtual bottom technology includes all panels with through holes used for separating the flow conditions of the water body fluid and simultaneously allowing the particles to pass through.

The panel structure with a plurality of through holes can be a plane or non-plane plate, the plate is distributed with regularly or irregularly arranged through holes, the caliber of the upper and lower holes is not required to be the same, and the size, the thickness and the size of the opening have no special requirements and are determined by specific application. The shape and orientation of the perforations may also be selected as appropriate, and the shape and orientation of the perforations may be different on the same or different perforated-hole panels. Can be made of any material which is not easy to be corroded by water, and the geometric shape can be selected optionally

A virtual pool bottom separation method comprises the following steps:

step 1: constructing a virtual pool bottom: laying a layer of virtual pool bottom which is higher than the actual pool bottom and consists of the rotational flow grid plate of claim 1 in a water body of a sedimentation pool or any solid-liquid separator, wherein the formed virtual pool bottom and the actual pool bottom are arranged horizontally or at a certain included angle and cover all or part of a water area; panels with several through holes are called cyclone grid plates in virtual pool bottom technology applications, because of the cyclone flow generated in its through holes when water flows over its surface. The water body is divided into an upper layer and a lower layer, so that the influence of the upper layer of water body on the lower water body and sediments can be effectively weakened, and suspended particles in water can freely pass through the water body. The laying method can be suspension, bottom support or other methods;

step 2: introducing a water body to be treated: introducing a water body to be treated into an upper water area on the bottom of a virtual pool of a sedimentation pool, wherein the water flow of the upper water area is mainly in the horizontal direction due to the existence of the virtual pool bottom, strong disturbance energy formed by flowing is difficult to penetrate through the virtual pool bottom, and the water body of the lower water area is not greatly influenced by the upper water flow, so that the sedimentation of suspended particles in water is facilitated;

and step 3: particle precipitation: when the water body to be treated flows on the upper surface of the rotational flow grid plate, the water body to be treated generates vertical rotational flow in a plurality of through holes formed in the rotational flow grid plate in a penetrating manner, and suspended particles in the water body to be treated can more easily pass through the virtual pool bottom formed by the rotational flow grid plate under the action of the vertical rotational flow and settle to a sediment collecting bin below the virtual pool bottom.

Double-cyclone solid-liquid separator based on virtual pool bottom, comprising a shell, a conical flow divider and a cyclone grid plate, wherein:

a sediment storage cavity is arranged at the bottom of the shell,

the conical flow divider is in an inverted cone shape and is arranged in the shell, and a channel opening is formed in the conical surface of the conical flow divider; the space between the inner wall of the shell and the outer wall of the conical flow divider is a lower swirling flow sediment cavity, and the space inside the conical flow divider is an upper swirling flow sediment cavity;

the cyclone grid plate is provided with a plurality of through holes and a central hole and is positioned at the bottom of the conical flow divider, and the lower end of the conical flow divider is communicated with the sediment storage cavity through the central hole.

The water inlet mechanism is arranged on the outer wall of the shell and comprises a water inlet, a water inlet channel and a floating object collecting pool, the water inlet channel is spiral, one end of the water inlet channel is communicated with the water inlet, and the other end of the water inlet channel is a water outlet and is communicated with the lower cyclone sedimentation cavity; the floater collecting pool is positioned above the water outlet of the water inlet channel and communicated with the water inlet.

Further, the floater collecting pit is equipped with perpendicular baffle and two horizontal baffle, perpendicular baffle and two horizontal baffle all establish at floater collecting pit bottom surface, two horizontal baffle is towards the inside gradually narrow opening that forms of floater collecting pit, horizontal baffle's height equals with the height of floater collecting pit lateral wall, the height of perpendicular baffle is less than horizontal baffle's height.

Further, the shell is further provided with a water inlet and a water outlet, the water outlet is formed above the conical flow divider, and the bottom of the shell is further provided with a support.

Further, still including establishing the arc guide plate in toper shunt upper end, the guide plate upper end sets up towards the inside slope of casing, leave the clearance between the lower extreme of guide plate and the shells inner wall.

Furthermore, the conical flow divider comprises at least one reverse cone concentrically arranged, and each reverse cone is provided with a passage opening.

Further, the sediment storage cavity is provided with a sediment outlet.

The working principle of the invention is as follows:

firstly, a virtual pool bottom structure is constructed and formed by arranging a rotational flow grid plate at the intersection of the inner cone of the shell and the circular cylinder. Due to the existence of the virtual pool bottom formed by the construction of the cyclone grid plate, the disturbance of the upper water body to the lower water body is greatly weakened, so that the water in the sediment storage cavity becomes calm, and suspended particles entering the sediment storage cavity are difficult to return to the upper water body above the cyclone grid plate. The space between shells inner wall and the toper shunt outer wall is lower whirl sediment chamber, and toper shunt inner space is upper whirl sediment chamber, and the toper shunt makes the water carry out secondary whirl circulation in the separator, is equivalent to pending water once through two traditional whirl grit chambers that have the same size to increase processing space and time, thereby further increase the efficiency of going the suspended solid and deposiing.

The invention has the beneficial effects that:

1. the application of the cyclone grid plate designed by the invention solves the problem that the particles in the sedimentation tank are taken away again by water flow after falling to the bottom of the tank, improves the particle removing efficiency of the separator, and particularly improves the capability of removing tiny particles;

2. the design and application of the conical flow divider enable the invention to better utilize the space of the double-cyclone solid-liquid separator and promote the second circulation of water flow, which is equivalent to that the water body to be treated passes through two traditional cyclone grit chambers with the same size at one time, and the particle removal efficiency is increased;

3. the invention has the advantages of small occupied area, no need of external power, no energy consumption, no moving parts, separation of inflow and captured particles, no secondary pollution risk, reliable operation, convenient cleaning and easy maintenance.

Drawings

FIG. 1 is a schematic diagram I of the overall structure of the present invention;

FIG. 2 is a schematic diagram II of the overall structure of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is an exploded view of the present invention;

FIG. 6 is an exploded view of the present invention, FIG. II;

FIG. 7 is a schematic view of the internal structure of the present invention;

FIG. 8 is a schematic view of the construction of the swirl grid plate of the present invention;

FIG. 9 is a schematic structural view of the tapered flow diverter of the present invention;

FIG. 10 is a graphical representation of the numerical simulation of the swirling flow at the perforations as water flows over the surface of the swirling grid plate;

FIG. 11 is a schematic structural view of a baffle of the present invention;

FIG. 12 is a schematic diagram III of the overall structure of the present invention;

fig. 13 is a schematic view of a virtual pool bottom application of the present invention.

In the figure: 1-casing, 2-water inlet channel, 3-particle precipitation chamber, 4-whirl net board, 5-toper shunt, 6-guide plate, 7-deposit storage chamber, 8-through-hole, 9-centre bore, 10-support, 11-passway, 12-lower whirl deposit subcavities, 13-upper whirl deposit subcavities, 14-water inlet, 15-floater collecting reservoir, 16-vertical baffle, 17-horizontal baffle, 18-casing water inlet, 19-delivery port, 20-deposit export.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1 to 7, the double-cyclone solid-liquid separator based on the virtual pool bottom of the present invention includes a housing 1 and a water inlet mechanism attached to a side surface of the housing 1. Casing 1 is the hollow cylinder of circle on the lower cone, and casing 1 inner wall an organic whole is connected with deposit storage chamber 7 is hugged closely to casing 1's inboard bottom of casing 1, and the barrel inner space more than storage chamber 7 is particle sedimentation chamber 3, and storage chamber 7 upper end is equipped with whirl graticule plate 4, toper shunt 5 and the guide plate 6 that virtual bottom of pool technique used. The virtual pool bottom is that a layer of rotational flow grid plate 4 parallel to the water surface is arranged at a certain depth below the water surface of the sedimentation pool, and under certain conditions, grid grids can be used to replace the rotational flow grid plate 4 to serve as the virtual pool bottom of the sedimentation pool. The swirl grid plate 4 is a circular flat plate with a series of through holes 8, the outer dimension of which is the same as the inner diameter of the housing 1. In the middle of which a central hole 9 for cleaning deposits is provided. Fig. 8 is a schematic diagram of one of the structures used in the test. The bottom of the housing 1 is provided with a plurality of supports 10 for supporting the upper end of the cyclone grid plate 4 to ensure that the captured suspended particles fall smoothly into the sediment storage chamber 7. The tapered flow divider 5 is provided with a passage port 11 (shown in fig. 9) on the side so that water located outside the tapered flow divider 5 can smoothly flow into the inside thereof. The deflector 6 is used to ensure that the water flowing into the inner side of the conical splitter 5 can continuously bypass the inside of the separator before flowing out of the solid-liquid splitter so as to increase the stroke and time of sewage treatment.

The cyclone grid plate 4 is used for a double cyclone solid-liquid separator based on the basic principle of the virtual pool bottom, and suspended particles close to the virtual pool bottom are accelerated and brought into water areas below the virtual pool bottom by using vertical cyclone (shown in figure 10) generated in each through hole 8 on the cyclone grid plate 4 when water flows through the upper surface of the cyclone grid plate. The cyclone grid plate 4 divides the sedimentation tank or the solid-liquid separator into an upper water area and a lower water area, and from the aspect of hydrodynamics, the water flow of the lower area of the virtual tank bottom is much more stable than that of the upper area. In other words, the upper and lower regions of the sedimentation tank or the solid-liquid separator are relatively independent and have little mutual influence, but for the sedimentation particles in the water, the virtual tank bottom does not appear to exist, and the sedimentation particles can freely pass through, so that the problem that the sedimentation particles can be re-taken by strong flow after falling to the actual tank bottom, which is faced by the traditional sedimentation tank or the solid-liquid separator, is solved, and the actual sedimentation probability of the particles is influenced. The invention provides a brand-new technology for enhancing and removing suspended particles in sewage; a layer of virtual pool bottom is constructed by laying and erecting a rotational flow grid plate 4 in a water body of the particle removing equipment. The thickness and shape of the swirl mesh plate 4 used, the size and shape of the openings of the through holes 8 in the swirl mesh plate 4, the angle of the through holes 8 and their arrangement and distribution will depend on the specific application. Although these parameters will affect the function and effect of the virtual bottom, the basic principle is the same, so the virtual bottom includes all the through-hole plates for separating the fluid flow conditions of the water area and simultaneously allowing the particles to pass through.

The basic working principle of the double-cyclone solid-liquid separator developed by utilizing the virtual pool bottom technology is as follows: firstly, a virtual pool bottom structure, namely a cyclone grid plate 4 is arranged between the particle settling cavity 3 and the sediment storage cavity 7 of the double-cyclone solid-liquid separator to increase the probability of particles entering the sediment storage cavity 7, and simultaneously, due to the existence of the virtual pool bottom, the water in the sediment storage cavity 7 becomes calm, so that the entering suspended particles are difficult to return to the upper water area, and the efficiency of suspended matter settling is greatly increased. Secondly, the particle sedimentation chamber 3 is divided into two parts by the conical flow divider 5, namely a lower cyclone sedimentation sub-chamber 12 and an upper cyclone sedimentation sub-chamber 13, so that the limited space can be fully utilized, water is forced to carry out secondary cyclone circulation in the separator, and the water body to be treated equivalently passes through two traditional cyclone sand basins with the same size once, so that the treatment space and the treatment time are increased, and the efficiency of removing suspended matters and sediments is further increased.

Example 1

As shown in fig. 1 to 7, in the present embodiment, the inlet channel 2 includes an inlet port 14, a float collecting tank 15, a vertical baffle 16 for preventing outflow of the float when the water level is lowered, and two angled horizontal baffles 17 for reducing outflow of the float. Thus, when the inlet water enters the inlet channel 2 of the double-cyclone solid-liquid separator from the inlet port 14, the flotage and grease lighter than water will be propelled by the water flow into the collection tank 15 for flotage located at the downstream end, and a vertical baffle 16 is provided at the inlet of the collection tank 15 for stopping the outflow of flotage when the water level is lowered. Meanwhile, the vertical baffle 16 is connected with two horizontal baffles 17 which form a certain angle, the distance between the two horizontal baffles 17 is the largest at the opening of the floating object collecting pool 15, and the two horizontal baffles gradually narrow along with the pushing towards the inside of the floating object collecting pool 15 so as to reduce the possibility of the floating objects flowing out. The water after the floating objects are removed enters a lower cyclone sedimentation sub cavity 12 formed by a cyclone grid plate 4 and a conical splitter 5 in the double cyclone solid-liquid separator from a shell water inlet 18 of the shell 1 in a tangential direction through the lower terminal of the water inlet channel 2. At the same time, if necessary, baffles can be installed at a short distance from the water inlet 14 of the water inlet channel 2 to break up the organic matters in the water by the water flow energy and separate the inorganic particles from the organic matters as much as possible.

In order to make the water entering the upper swirling sediment sub-cavity 13 to detour at least one circle in the upper swirling sediment sub-cavity, a deflector 6 is arranged in front of the upper water outlet of the conical splitter 5 to force the water to flow around the inner side of the conical splitter 5 and block the water from directly flowing out of the outlet. The baffle 6 is constructed as shown in fig. 11 and is mounted on a circular frame of the same size as the inner diameter of the shell 1. the baffle 6 (fig. 11) can also be mounted directly on the inside of the conical splitter 5 or shell 1 and elsewhere. The baffle 6 is inclined towards the centre of the housing 1, its length and height being determined by the circumstances. A space is left between the bottom of the deflector 6 and the inner wall of the housing 1 to allow particles precipitated on the back of the deflector 6 to slide onto the inner side of the conical splitter 5 to eventually flow into the sediment storage chamber 7. The water is discharged from the water outlet 19 after at least two weeks around the solid liquid separator, and the inlet and outlet pipes connected thereto will be more convenient to install and less expensive to install in use, since the direction of the inlet and outlet is 180 degrees. The internal structure of the separator can be made of any material resistant to the corrosion of contaminated water.

Example 2

In the case of the application in which it is not necessary to remove floating materials from the water based on embodiment 1, the water inlet channel 2 attached to the housing 1 may be omitted as shown in fig. 12. The inlet water is tangentially conveyed into the lower cyclone settling sub-chamber 12 from the water inlet 14 for treatment, and the treatment process is the same as that of the embodiment 1. Due to the constraint of the conical flow divider 5, the water entering the lower cyclone settling sub cavity 12 horizontally surrounds in the solid-liquid separator in the tangential direction, the suspended particles which can be settled in the water enter the lower settling storage cavity 7 through the cyclone grid plate 4 at the bottom of the virtual pool, and the existence of the cyclone grid plate 4 at the bottom of the virtual pool makes the particles entering the settling storage cavity 7 not return to the water area above the cyclone grid plate 4 again. At the same time, the water flowing along the upper surface of the cyclone grid plate 4 can play a role of automatically cleaning the cyclone grid plate 4 used for the virtual pool bottom. When the water finishes one circle of the lower swirling flow sediment sub cavity 12, the water flows into the inner side of the conical flow divider 5 from the side channel opening 11 of the conical flow divider 5 in the tangential direction, the side inclination angle of the conical flow divider 5 is not less than 45 degrees, one edge of the side channel opening 11 of the conical flow divider 5 is bent outwards and is connected to the inner side of the shell 1, and therefore all the water which finishes one circle of the lower swirling flow sediment sub cavity 12 is forced to enter the upper swirling flow sediment sub cavity 13 for further treatment. The other edge of the side channel opening 11 of the conical flow divider 5 is bent inwards, which allows water to pass through more easily. To increase the efficiency of the removal of light particles, it is conceivable to install a swirl claw generator like that described in patent No. 2021108473380 on the inner side of the conical flow splitter 5 or to add several concentric conical flow splitters 5.

The invention promotes the sedimentation of suspended particles from several aspects: firstly, the use of the virtual pool bottom technology solves the problem that the traditional sedimentation pool or solid-liquid separator is likely to be carried away again by strong flow after the sedimentation particles fall to the actual pool bottom. Thereby greatly increasing the efficiency of suspended matter precipitation. Secondly, the particle sedimentation chamber 3 is divided into two parts by the conical flow divider 5, namely a lower cyclone sedimentation sub-chamber 12 and an upper cyclone sedimentation sub-chamber 13, so that the limited space can be fully utilized, water is forced to carry out secondary cyclone circulation in the separator, and the water body to be treated equivalently passes through two traditional cyclone sand basins with the same size once, so that the treatment space and time are increased, and the efficiency of removing suspended matter sediment is further increased.

The virtual pool bottom basic principle and the double-cyclone solid-liquid separator provided by the invention can be used as a high-efficiency grit chamber or a solid-liquid separator for primary treatment of urban and rural sewage and treatment of sewage such as rainwater runoff, combined overflow sewage, mining and oil extraction, have no special requirements on a use area, and can be installed under the ground or on the ground. When in use, the sewage can be operated by connecting the water inlet 14 with the sewage supply pipe and connecting the water outlet 19 with the discharge pipe. When the dual cyclone solid liquid separator is installed underground, the ground may be perforated just above the central bore of the dual cyclone solid liquid separator to suck off the sediment or to convey the collected sediment from the bottom sediment outlet 20 of the sediment storage chamber 7 to the ground by means of a screw conveyor or in some other manner. The ground right above the floating object collecting pool 15 of the water inlet channel 2 needs to be provided with holes to absorb the floating objects. If the bottom is selected to clean the sediment, the top of the dual cyclone solid liquid separator can be capped to reduce odor contamination.

The above embodiments relate to the application of virtual bottom technology to the design framework of cylindrical equipment, but of course, under the same principle, the virtual bottom technology can be applied to settling ponds of other shapes, such as rectangular and elliptical, etc., as shown in fig. 13.

Therefore, the above detailed description merely describes preferred embodiments of the present invention and does not limit the scope of the present invention. Without departing from the spirit and scope of the present invention, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. A virtual pool bottom, comprising: the water treatment device is a virtual pool bottom formed by splicing at least one basic unit structure which is a rotational flow grid plate, the rotational flow grid plate is provided with a plurality of through holes, and the rotational flow grid plate is laid on the actual pool bottom and can divide a water body into an upper water area and a lower water area.

2. A virtual pool bottom separation method is characterized by comprising the following steps:

step 1: constructing a virtual pool bottom: laying a layer of virtual pool bottom which is higher than the actual pool bottom and consists of the rotational flow grid plate of claim 1 in a water body of a sedimentation pool or any solid-liquid separator, wherein the formed virtual pool bottom is parallel to the water surface or forms a certain included angle with the water surface, and covers all or part of the water area;

step 2: introducing a water body to be treated: introducing a water body to be treated into an upper water area on the bottom of a virtual pool of a sedimentation pool, wherein the water flow of the upper water area is mainly in the horizontal direction due to the existence of the virtual pool bottom, strong disturbance energy formed by flow is difficult to penetrate through the virtual pool bottom, and the water body of a lower water area is not greatly influenced by the upper water flow, so that the sedimentation of suspended particles in water can be promoted;

and step 3: particle precipitation: when the water body to be treated flows on the upper surface of the rotational flow grid plate, the water body to be treated generates vertical rotational flow in a plurality of through holes which are formed in the rotational flow grid plate in a penetrating way, and suspended particles in the water body to be treated are easier to precipitate below the virtual pool bottom through the virtual pool bottom formed by the rotational flow grid plate under the action of the vertical rotational flow.

3. The utility model provides a two cyclone separator based on virtual bottom of pool which characterized in that: including casing (1), toper shunt (5) and whirl graticule board (4), wherein:

a sediment storage cavity (7) is arranged at the bottom of the shell (1),

the conical flow divider (5) is in an inverted cone shape and is arranged in the shell (1), and a channel opening (11) is formed in the conical surface of the conical flow divider (5); the space between the inner wall of the shell (1) and the outer wall of the conical flow divider (5) is a lower swirling flow sediment sub-cavity (12), and the inner space of the conical flow divider (5) is an upper swirling flow sediment sub-cavity (13);

the cyclone grid plate (4) is provided with a plurality of through holes (8) and a central hole (9) and is positioned at the bottom of the conical flow divider (5), and the lower end of the conical flow divider (5) is communicated with the sediment storage cavity (7) through the central hole (9).

4. The virtual pool bottom-based dual cyclone separator of claim 3, wherein: the water inlet mechanism is arranged on the outer wall of the shell (1) and comprises a water inlet (14), a water inlet channel (2) and a floating object collecting pool (15), wherein the water inlet channel (15) is spiral, one end of the water inlet channel is communicated with the water inlet (14), and the other end of the water inlet channel is a water outlet and is communicated with the lower cyclone sedimentation cavity (12); the floating object collecting tank (15) is positioned above the water outlet (19) of the water inlet channel (2) and is communicated with the water inlet (14).

5. The virtual pool bottom-based dual cyclone separator of claim 3, wherein: floater collecting pit (15) are equipped with perpendicular baffle (16) and two horizontal baffle (17), perpendicular baffle (16) and two horizontal baffle (17) are all established at floater collecting pit (15) bottom surface, two horizontal baffle (17) form gradually narrow opening towards floater collecting pit (15) inside, the height of horizontal baffle (17) equals with the height of floater collecting pit (15) lateral wall, the height of perpendicular baffle (16) is less than the height of horizontal baffle (17).

6. The virtual pool bottom-based dual cyclone separator of claim 3, wherein: the shell (1) is further provided with a water inlet (14) and a water outlet (19), the water outlet (19) is arranged above the conical flow divider (5), and the bottom of the shell (1) is further provided with a support (10).

7. The virtual pool bottom-based dual cyclone separator of claim 3, wherein: still including establishing arc guide plate (6) in toper shunt (5) upper end, guide plate (6) upper end sets up towards casing (1) inside slope, leave the clearance between the lower extreme of guide plate (6) and casing (1) inner wall.

8. The virtual pool bottom-based dual cyclone separator of claim 3, wherein: the conical flow divider (5) comprises at least one reverse cone concentrically arranged, and each reverse cone is provided with a passage opening (11).

9. The virtual pool bottom-based dual cyclone separator of claim 3, wherein: the sediment storage chamber (7) is provided with a sediment outlet (20).