CN216366784U

CN216366784U - Microfiltration tank system

Info

Publication number: CN216366784U
Application number: CN202122945231.8U
Authority: CN
Inventors: 胡小弟; 姜洪杰; 姜振华
Original assignee: Beijing Drop Water Environmental Protection Technology Co ltd
Current assignee: Beijing Drop Water Environmental Protection Technology Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-04-26
Anticipated expiration: 2031-11-26

Abstract

The utility model provides a microfiltration tank system, which relates to the technical field of environmental protection water supply and drainage and comprises the following components: the tank body main body and the sand stopper; the top of jar body main part has last drain hole, keep off the sand ware with the inner wall of jar body main part is connected, the internal filter bed that has of jar body main part, keep off the sand ware set up in the filter bed with go up between the drain hole, it configures to change the orientation to keep off the sand ware the direction of motion of the filter material that the drain hole flows is gone up. Through set up the sand stopper in jar body main part, the sand stopper is located between drain hole and the filter material layer, and during the back flush, the filter material layer moves towards the direction of sand stopper, and the sand stopper blocks the filter material, changes the direction of motion of filter material, effectively avoids the filter material to flow from the drain hole of going up, has alleviated the drain hole outflow that exists at the back flush among the prior art, and the filter material upwards boils, and the filter material can pass through the top, causes the technical problem of lou material.

Description

Microfiltration tank system

Technical Field

The utility model relates to the technical field of environment-friendly water supply and drainage, in particular to a microfiltration tank system.

Background

Granular filter materials (quartz sand, multi-media, anthracite and the like) are filled into a pressure tank body for filtering, generally called an amorphous filter material filtering tank or a sand filtering tank, and the filter tank has the advantages of simple structure and low price.

However, during back flushing, the filter material boils upward, and the filter material may flow out through the drain outlet at the top, causing material leakage.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a microfiltration tank system to solve the technical problem that in the prior art, during backwashing, filter materials are boiled upwards and flow out through a drain outlet at the top to cause material leakage.

In a first aspect, the present invention provides a microfiltration tank system comprising: the tank body main body and the sand stopper;

the top of jar body main part has last drain hole, keep off the sand ware with the inner wall of jar body main part is connected, the internal filter bed that has of jar body main part, keep off the sand ware set up in the filter bed with go up between the drain hole, it configures to change the orientation to keep off the sand ware the direction of motion of the filter material that the drain hole flows is gone up.

In an alternative embodiment of the method of the present invention,

the cross section of the sand stopper is oval, and the sand stopper is connected with the tank body main body through a plurality of connecting rods;

the diameter size of the sand stopper is larger than that of the upper drainage port.

In an alternative embodiment of the method of the present invention,

the side of going up the drain hole is provided with the gas vent, gas vent department is provided with the air discharge valve, the air discharge valve configuration can be opened through electrical apparatus control intermittent type.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises a water inlet and sewage discharge pipeline;

one end of the water inlet sewage discharge pipeline is connected with the side wall of the tank body main body, and the other end of the water inlet sewage discharge pipeline is communicated with the sewage discharge main pipe;

a first sewage draining valve is arranged at the sewage draining end of the water inlet sewage draining pipeline, and a variable frequency pump and a water inlet valve are arranged at the water inlet end of the water inlet sewage draining pipeline;

the pipe diameter size of the water inlet sewage discharge pipeline is 5-10% of the diameter size of the tank body main body.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises a cross-flow sewage discharge pipe;

the cross-flow blow-off pipe is communicated with the tank body main body and is positioned above the water inlet blow-off pipeline, and a second blow-off valve is arranged on the cross-flow blow-off pipe.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises a choke coil;

the inner wall of the tank body main body is provided with a plurality of choked flow rings, and the choked flow rings are arranged at intervals along the inner wall of the tank body main body;

the cross-sectional shape of the choker is set to be triangular, and the included angle between the choker and the inner wall of the tank body main body is 45 degrees.

In an alternative embodiment of the method of the present invention,

the filter material layer is made of any one of a manually sintered microporous ceramic filter material, a volcanic filter material, quartz sand, a multi-medium, anthracite, ceramsite or activated carbon.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises a backwashing main gas pipe and a backwashing branch gas pipe;

the backwashing main gas pipe and the backwashing branch gas pipes are arranged in the tank body main body, the backwashing main gas pipe and the backwashing branch gas pipes are located below the filter material layer, and the backwashing branch gas pipes are communicated with the backwashing main gas pipe.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises an air source distributor, an air storage tank and an air compressor;

the air compressor is connected with the air storage tank through a pipeline, the air storage tank is connected with the air source distributor through a pipeline, and the air source distributor is connected with the backwashing main air pipe;

the back-aeration pressure sprayed out of the back-washing bronchus is 0.4-0.6 Mpa.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises a stainless steel filter screen;

the stainless steel filter screen is arranged in the tank body main body and is positioned below the filter material layer;

the stainless steel filter screen includes coarse mesh and fine mesh, coarse mesh with fine mesh interval crisscross setting.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises a bearing flat steel;

the both ends welding of bearing band steel be in on the low head of jar body main part, the bearing band steel supports the stainless steel filter screen.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises a movable flange and a fixed flange;

the fixed flange is connected with the lower end socket, the stainless steel filter screen is arranged between the fixed flange and the movable flange, the fixed flange is provided with a harness cord bolt, and the movable flange is connected with the harness cord bolt;

an upper sealing ring is arranged between the movable flange and the stainless steel filter screen, and a lower sealing ring is arranged between the fixed flange and the stainless steel filter screen.

In an alternative embodiment of the method of the present invention,

and the harness cord bolts are uniformly distributed and welded along the circumferential direction of the fixed flange.

In an alternative embodiment of the method of the present invention,

the bearing flat steel is provided with a notch, and the end face of the fixing flange is positioned in the notch.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises an upper partition plate and a lower partition plate;

the upper clapboard is positioned above the stainless steel filter screen, the lower clapboard is positioned below the stainless steel filter screen, and the upper clapboard is connected with the bearing flat steel through angle steel and bolts;

the upper baffle and the lower baffle divide the lower seal head into a plurality of back washing channels.

In an alternative embodiment of the method of the present invention,

the microfiltration tank system also comprises a water outlet pipeline;

the bottom of the tank body main body is provided with a water outlet, the water outlet is connected with a water outlet pipeline, and a water outlet valve, a pressure sensor and a turbidity sensor are sequentially arranged on the water outlet pipeline along the water outlet direction.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises a forward washing pipeline;

one end of the forward washing pipeline is connected with the water outlet pipeline, the other end of the forward washing pipeline is connected with the main sewage discharge pipe, and a forward washing valve is arranged on the forward washing pipeline.

In an alternative embodiment of the method of the present invention,

the micro-filtration tank system also comprises a backwashing water inlet pipeline;

the backwashing water inlet pipeline is connected with the water outlet pipeline and is provided with a backwashing water inlet valve.

The utility model provides a microfiltration tank system, comprising: the tank body main body and the sand stopper; the top of jar body main part has last drain hole, keep off the sand ware with the inner wall of jar body main part is connected, the internal filter bed that has of jar body main part, keep off the sand ware set up in the filter bed with go up between the drain hole, it configures to change the orientation to keep off the sand ware the direction of motion of the filter material that the drain hole flows is gone up. Through set up the sand stopper in jar body main part, the sand stopper is located between drain hole and the filter material layer, and during the back flush, the filter material layer moves towards the direction of sand stopper, and the sand stopper blocks the filter material, changes the direction of motion of filter material, effectively avoids the filter material to flow from the drain hole of going up, has alleviated the drain hole outflow that exists at the back flush among the prior art, and the filter material upwards boils, and the filter material can pass through the top, causes the technical problem of lou material.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of the overall structure of a microfiltration tank system according to an embodiment of the utility model;

FIG. 2 is a schematic structural view of a flat steel support and a stainless steel screen in a microfiltration tank system according to an embodiment of the utility model;

FIG. 3 is a schematic structural diagram of the K-direction of a flat steel support and a stainless steel screen in a microfiltration tank system according to an embodiment of the utility model;

fig. 4 is a schematic structural diagram of a movable flange and a fixed flange in a microfiltration tank system according to an embodiment of the utility model;

fig. 5 is a schematic structural diagram of a fixing flange in a microfiltration tank system according to an embodiment of the utility model;

FIG. 6 is a schematic structural diagram of an upper partition and a lower partition in a microfiltration tank system according to an embodiment of the utility model;

fig. 7 is a schematic structural view of an upper partition plate and an angle iron support in a microfiltration tank system according to an embodiment of the utility model;

FIG. 8 is a schematic view of a water flow with a rectangular cross-section of a flow-resisting ring in a microfiltration tank system according to an embodiment of the utility model;

FIG. 9 is a schematic view of a flow of water in which the cross-section of the flow-resisting ring is semicircular in the micro-filtration tank system provided by an embodiment of the present invention;

fig. 10 is a schematic view of water flow with triangular cross-section of a flow resisting ring in a microfiltration tank system according to an embodiment of the utility model;

FIG. 11 is a graph of experimental data for filter accuracy and filter media diameter;

FIG. 12 is a graph of experimental data for filter accuracy and filter layer height;

FIG. 13 is a graph of experimental data for filter accuracy and filter layer material;

FIG. 14 is a graph of experimental data for filtration accuracy and filtration pressure;

FIG. 15 is a graph of experimental data for recoil behavior and bronchial diameter;

FIG. 16 is a chart of experimental data for the recoil condition and jet main pipe diameter;

fig. 17 is a graph of experimental data for the recoil condition and recoil air pressure.

Icon: 1-a can body main body; 2-a sand stopper; 3-an upper drain outlet; 4-a filter material layer; 5, sealing the head; 6-an exhaust port; 7-an exhaust valve; 8-water inlet and sewage draining pipeline; 9-a main sewage drain; 10-a first waste valve; 11-a variable frequency pump; 12-a water inlet valve; 13-cross flow blow-off pipe; 14-a second waste valve; 15-choked flow; 16-backwashing the main gas pipe; 17-backwashing the bronchus; 18-a gas source distributor; 19-a gas storage tank; 20-an air compressor; 21-stainless steel screen; 22-supporting flat steel; 23-lower end enclosure; 24-a movable flange; 25-a fixed flange; 26-a harness bolt; 27-upper sealing ring; 28-lower sealing ring; 29-upper partition plate; 30-a lower baffle plate; 31-water outlet pipeline; 32-a water outlet; 33-outlet valve; 34-a pressure sensor; 35-a turbidity sensor; 36-a forward wash line; 37-a forward wash valve; 38-backwash water inlet line; 39-backwashing water inlet valve; 40-manhole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

As shown in fig. 1, the microfiltration tank system provided in this embodiment includes: a tank body main body 1 and a sand stopper 2; the top of the tank body main body 1 is provided with an upper drain outlet 3, the sand stopper 2 is connected with the inner wall of the tank body main body 1, the tank body main body 1 is internally provided with a filter material layer 4, the sand stopper 2 is arranged between the filter material layer 4 and the upper drain outlet 3, and the sand stopper 2 is configured to be capable of changing the movement direction of a filter material flowing towards the upper drain outlet 3; the cross section of the sand stopper 2 is elliptical, and the sand stopper 2 is connected with the tank body main body 1 through a plurality of connecting rods; the diameter of the sand stopper 2 is 120-200% of that of the upper drainage outlet 3; the distance between the sand stopper 2 and the upper sewage outlet 3 is 120-200% of the diameter of the upper sewage outlet 3.

Specifically, during backwashing, the filter material boils upwards, and leakage is possibly generated through the upper drain outlet 3, so the sand stopper 2 is designed, the sand stopper 2 is in an oval shape and is fixed with the upper seal head 5 by a plurality of connecting rods, in the actual production process, the two oval seal heads are welded together in a butt welding mode, the outer surface of the oval shape is smooth, the upward backwashing water flow resistance is small, occasionally, the filter material falling from the upper surface is difficult to retain and slide back to the filter layer, according to experimental determination, the diameter of the sand stopper 2 is 120-200% and the optimal 150% of the diameter of the upper drain outlet 3, and the distance from the upper drain outlet 3 is 120-200% and the optimal 150% of the diameter of the upper drain outlet 3.

In an optional embodiment, the top end of the tank body main body 1 is provided with an upper sealing head 5, and the diameter size of the upper drainage port 3 is 5-15% of the diameter size of the upper sealing head 5

Specifically, go up drain 3 and be the passageway when the backwash blowdown, the diameter is big then the blowdown time is short more, is favorable to avoiding the filth after the jar internal recoil to precipitate once more, but the diameter is big then whole blow off pipe also all will increase, the expense is corresponding to be improved, through the sewage pipes survey of different diameters, and the law of summarizing is: the diameter of the upper drain outlet 3 is 5-15%, preferably 10% of the diameter of the seal head.

In addition, the manhole 40 is arranged on the side part of the tank body 1, so that the subsequent maintenance of the tank body 1 is facilitated.

The microfiltration tank system that this embodiment provided includes: a tank body main body 1 and a sand stopper 2; the top of jar body main part 1 has last drain hole 3, keeps off sand ware 2 and jar body main part 1's inner wall connection, has filter material layer 4 in jar body main part 1, keeps off sand ware 2 and sets up between filter material layer 4 and last drain hole 3, keeps off sand ware 2 configuration and can change the direction of motion of the filter material that drain hole 3 flows in the orientation. Through set up sand stopper 2 in jar body 1, sand stopper 2 is located between drain 3 and the filter material layer 4 on, during the back flush, filter material layer 4 moves towards the direction of sand stopper 2, and sand stopper 2 blocks the filter material, changes the direction of motion of filter material, effectively avoids the filter material to follow drain 3 and flows out, has alleviated the back flush that exists among the prior art, and the filter material upwards boils, and the filter material can flow out through the drain at top, causes the technical problem of lou material.

In an alternative embodiment, an exhaust port 6 is arranged on the side of the upper exhaust port 3, an exhaust valve 7 is arranged at the exhaust port 6, and the exhaust valve 7 is configured to be opened intermittently under the control of an electric appliance.

Specifically, the water cannot be prevented from containing a small amount of air, the continuous accumulation of the air in the tank can even cause no water on the filtering layer, and the stability of the operation flow is seriously influenced, so that the exhaust port 6 and the exhaust valve 7 are designed on the side surface of the upper sewage outlet 3, and the exhaust valve 7 is controlled to be opened intermittently by electric appliances, for example, the opening time is 30 seconds per hour, and the pipe diameter is 1 inch.

In an alternative embodiment, the microfiltration tank system further comprises a feed blowdown line 8; one end of the water inlet sewage discharge pipeline 8 is connected with the side wall of the tank body main body 1, and the other end of the water inlet sewage discharge pipeline 8 is communicated with the sewage discharge main pipe 9; a first sewage draining valve 10 is arranged at the sewage draining end of the water inlet sewage draining pipeline 8, and a variable frequency pump 11 and a water inlet valve 12 are arranged at the water inlet end of the water inlet sewage draining pipeline 8; the pipe diameter size of the water inlet sewage discharge pipeline 8 is 5-10% of the diameter size of the tank body main body 1.

Specifically, the pipe diameter that first blowdown valve 10 is connected is the blow off pipe before both backflushing, and as the inlet tube of normal during operation again, its diameter has the associativity with jar body diameter, through the survey of different pipe diameters and pressure, relatively suitable scope is: the pipe diameter is 5-10%, preferably 5% of the diameter of the tank body.

In an alternative embodiment, the microfiltration tank system further comprises a cross-flow blowdown pipe 13; the cross-flow sewage discharge pipe 13 is communicated with the tank body main body 1, the cross-flow sewage discharge pipe 13 is positioned above the water inlet sewage discharge pipeline 8, and a second sewage discharge valve 14 is arranged on the cross-flow sewage discharge pipe 13.

Specifically, the pipe diameter connected with the second sewage draining valve 14 is called as a cross-flow sewage draining pipe 13, and the function of the cross-flow sewage draining pipe is as follows: when the inlet water turbidity is higher, the normal operation of the equipment system is influenced, or the backwashing period is shortened, under the condition, the second blowdown valve 14 is opened to remove concentrated sewage accumulated on the filter layer during the operation, so that the concentration multiple is reduced to keep the normal operation, for example, the inlet water turbidity is 20NTU under the normal condition, the second blowdown valve 14 of the cross-flow blowdown pipe 13 is opened, the inlet water turbidity can be increased to 80-100 NTU, so that the applicability of the tank body main body 1 is expanded, the pipe diameter of the cross-flow blowdown pipe 13 is determined to be 1 inch and is the same as that of the exhaust pipe, so that the specification of the valve or spare parts in the future is reduced, and the cost is reduced.

In an alternative embodiment, the microfiltration tank system further comprises a flow-blocking collar 15; the inner wall of the tank body main body 1 is provided with a plurality of choked flow rings 15, and the choked flow rings 15 are arranged at intervals along the inner wall of the tank body main body 1; the cross-sectional shape of the choker 15 is set to be triangular, and the included angle between the choker 15 and the inner wall of the tank body main body 1 is 45 degrees.

Specifically, in order to prevent water flow from flowing along the inner wall of the tank without passing through the filter material and ensure the filtering effect, an annular structure for blocking the water flow is designed and called as a choked flow ring 15, as shown in fig. 8, 9 and 10, the effect of the choked flow ring 15 with different shapes is studied, when a baffle plate perpendicular to the water flow from top to bottom is adopted, the choked flow effect is best, but the resistance to the water flow is also maximum, and the filter material is prevented from moving upwards during backwashing.

When adopting semicircular choker 15, the condition improves to some extent, but rivers can flow along the arc border, the choked flow effect descends, when adopting and rivers to be 45 degrees angles, the effect is the best, rivers pass through 45 degrees inclined plane guide effect and get into the filter material, realize the filter effect, the filter material also can rise through the direction on inclined plane during the backwash, realized avoiding wall flow and backwash filter material dual function that rises smoothly, above-mentioned principle is implemented to the implementation in the embodiment, actually adopt the angle steel welding on the jar wall, it is required to point out: the two sides of the angle steel are welded at all positions, so that the water flow short circuit is avoided, and the analysis effect is completely realized.

Further data are: when the diameter of the tank body is less than 3 meters, angle steel with the diameter of 25 × 25mm or 30 × 30mm is adopted, and when the diameter of the tank body is more than 3 meters, angle steel with the diameter of 30 × 30mm to 50 × 50mm is adopted.

In an optional embodiment, the water inlet pressure of the tank body 1 is 0.2Mpa, and the content of the inlet suspended matters is 20 Mg/L; the height of the filter material layer 4 is 2.5-3 m; the diameter of the filter material particles in the filter material layer 4 is 0.6-2.0 mm.

Specifically, as shown in fig. 11, the relationship between different filter material particles and the filtering precision is studied, the finer the filter particles, the higher the filtering precision, but the larger the resistance pressure of the filtration, the smaller the dirt containing space of the whole filter layer, which results in the shortening of the backwashing period, the fixed water inlet pressure of 0.2Mpa, the inlet suspended matter of less than 50mg/L, the height of the filter layer of 2.6 meters, and the relationship between the average diameter of the filter material particles and the filtering precision, according to the analysis of the comprehensive test result, when the diameter of the filter material is about 0.6-2 mm, the filtering precision can reach 0.1 micron, which is the treatment effect of the ultrafiltration membrane, the backwashing period is 24 hours, which is also acceptable for the field application of water treatment, and the diameter of the filter material of the microfiltration tank is determined by considering the different inlet suspended matter contents and the operating pressure: 0.5 to 10mm, preferably 0.6 to 2.0 mm.

In addition, as shown in fig. 12, the influence of different filter layer heights on the filtering precision is researched and tested, the fixed water inlet pressure is 0.2Mpa, the water inlet suspended matter content is 20Mg/L, the filter material particle range is 0.6-2.0 mm, and when the filter layer height reaches 2.5 meters, the filtering precision can reach 0.1 micron, so that the filter layer height is determined to be 2.5-3 meters.

In an alternative embodiment, the filter material layer is any one of a manually sintered microporous ceramic filter material, a volcanic filter material, quartz sand, a multi-medium, anthracite, ceramsite or activated carbon.

As shown in FIG. 13, under the conditions of 0.2MPa of filtering pressure and 20mg/L of water suspension with 2.6 m of height of filtering layer, the filtering precision of different filtering materials is studied, and the results show that: the artificially sintered microporous ceramic filter material has the highest filtering precision, because the porosity of the artificially sintered filter material is controllable to obtain the best comprehensive index, and the volcanic rock is a natural filter material with lower price than that of the artificially sintered filter material, so the artificially sintered microporous ceramic filter material is also a preferred filter material, the surface porosity of the anthracite is far lower than that of the volcanic rock, so the filtering precision is obviously reduced, and the surfaces of the quartz sand and the multi-medium have no micropores and are suitable for being used as coarse filtration, so when higher filtering precision is required, when the filtering precision is required to be less than 1 micron, the volcanic rock and the artificially sintered microporous ceramic filter material can be preferably selected.

In addition, the artificial sintered microporous ceramic particles are used as a filtering material, the height of a filtering layer is 2.6, the diameter of the particles is 0.6-2 mm, the filtering precision is obtained by testing different pressures, when the filtering pressure reaches 0.2Mpa, the precision of 0.1 micron can be obtained, the precision enters the range of the ultrafiltration membrane, the technical index can meet the requirements for most working conditions, even if the filtering pressure is reduced to 0.1Mpa, the filtering precision of 1 micron is still achieved, which is higher than the precision range of 10 microns of the traditional filtering mode of the common quartz sand, this means that the sand filter has an energy-saving effect compared with the traditional sand filter, the pressure is continuously increased from 0.2Mpa, the improvement of the filtering precision is limited, this is because the rigid filter material is incompressible, the porosity does not change, and therefore the accuracy effect is not significant, meanwhile, the pressure is increased, which means that the energy consumption is increased, and the comprehensive analysis shows that the filtering working pressure is in the optimal range of 0.1-0.2 MPa as shown in FIG. 14.

In an alternative embodiment, the microfiltration tank system further comprises a backwash main gas pipe 16 and a backwash sub-gas pipe 17; the backwashing main gas pipe 16 and the backwashing branch gas pipe 17 are arranged in the tank body main body 1, the backwashing main gas pipe 16 and the backwashing branch gas pipe 17 are both positioned below the filter material layer 4, and the backwashing branch gas pipes 17 are communicated with the backwashing main gas pipe 16.

Specifically, as shown in fig. 15, in order to reduce the backwashing energy consumption and water consumption, a backwashing manner mainly using compressed air is adopted, that is, when the filter layer is 2.6 m high, compressed air is introduced to support and boil the filter material, so as to realize the friction cleaning effect, which relates to the pressure of backwashing compressed air and the optimal pipe diameters of the backwashing main air pipe 16 and the backwashing branch air pipe 17, firstly, the backwashing pressure is fixed to be 0.4Mpa, the pipe diameter of the backwashing main air pipe 16 is 2 inches, and the backwashing effects of different branch air pipe diameters are observed. The phenomenon is discovered through comparison, the pipe diameters of 4 minutes and 6 minutes are adopted, the filter layer generates bubbles but does not boil after ventilation, the filter material expands and boils when the pipe diameter reaches 1 inch, the expected friction cleaning effect of the filter material is achieved, the effect of adopting the pipe diameter of 1.5 inches is the same as that of the pipe diameter of 1 inch, and the pipe diameter of 1 inch is finally confirmed to be the most suitable pipe diameter of 1 inch in economic consideration.

As shown in fig. 16, the diameter of the backwash main air pipe 16 is studied, the fixed backwash pressure is 0.4Mpa, the pipe diameter of the backwash branch air pipe 17 is 1 inch, the backwash effect of different backwash main air pipes 16 is observed, when the diameter is 6 minutes and 1 inch, the boiling can not be realized, and when the pipe diameter reaches 2 inches, an ideal boiling state is realized, and finally, the pipe diameter of the backwash main air pipe 16 is determined to be 2 inches.

In an alternative embodiment, the microfiltration tank system further comprises a gas source distributor 18, a gas storage tank 19 and an air compressor 20; the air compressor 20 is connected with the air storage tank 19 through a pipeline, the air storage tank 19 is connected with the air source distributor 18 through a pipeline, and the air source distributor 18 is connected with the backwashing main air pipe 16; the back-aeration pressure ejected from the back-washing bronchus 17 is 0.4-0.6 MPa.

Specifically, as shown in fig. 17, the pressure is important when the gas is used for backflushing, the gas pressure is low, the energy is saved, but the backflushing effect is poor, the gas pressure is high, the backflushing effect is good, but the power consumption is increased, and according to the conclusions obtained above, the proper backflushing pressure is researched according to the highest possible filter layer of 3 meters. Through repeated test and comparison, it can be seen from the figure that when the air pressure is lower than 0.4Mpa, the filter material can not be boiled, and can obtain ideal effect only when the air pressure is higher than 0.4Mpa, and the boiling height of 0.6Mpa is higher than 0.4Mpa, the backflushing is more sufficient, and the significance is not large, but energy is wasted, so that the backflushing air pressure is determined to be 0.4-0.6 Mpa.

The ideal backflushing state is obtained only by insufficient air pressure, continuous air volume is required to be ensured, the problem of whether the filter material can be boiled or not is solved by the air pressure, the problem of how long the boiling can be continued is solved by the air volume, the backflushing is designed to be carried out in a horizontal cross section of the tank body in a partitioning mode, the partitioning principle is not more than 1.2 square meters, so that the backflushing effect can be met as long as how to guarantee that the air storage tank 19 is continuously sealed for 15 seconds within the range of 1.2 square meters, and the requirement can be met when the volume of the air storage tank 19 is more than or equal to 1 cubic meter through actual operation and measurement, and the continuous boiling is achieved for 20 seconds. The power of the matched air compressor 20 is more than or equal to 5.5 KW.

In an alternative embodiment, the distance between the filter material layer 4 and the top of the tank body 1 is 40-60% of the height dimension of the filter material layer 4.

Specifically, the filter layer upper space is used for containing the filter material to be boiled and expanded in the backwashing process, the manufacturing cost is increased due to the overhigh space height, the backwashing effect is influenced due to the fact that the space height is too low and is difficult to expand effectively, and the experiment tests confirm that the height of the filter layer upper space 10 is 40-60% of the height of the filter layer, and the optimal height is 50%.

In order to ensure the backwashing effect and reduce the energy consumption, the lower end enclosure 23 of the filter tank is divided into a plurality of regions, the more the divided regions are, the smaller the area of the relative region is, the better the backwashing effect is, but the more the structure is complex and the manufacturing cost is correspondingly improved, the less the partitions are, the simpler the structure is, the manufacturing cost is also reduced, but the backwashing effect is reduced, the scheme aims to find the optimal range, according to the research conclusion of the air volume and the air pressure, the ideal backwashing effect can be achieved as long as the partitions are less than or equal to 1.2 square meters, and the conclusion is that:

in an alternative embodiment, the microfiltration tank system further comprises a stainless steel screen 21; the stainless steel filter screen 21 is arranged in the tank body main body 1, and the stainless steel filter screen 21 is positioned below the filter material layer 4; the stainless steel filter screen 21 comprises a coarse screen and a fine screen which are arranged in a staggered mode at intervals.

Specifically, as shown in fig. 2 and 3, the stainless steel filter screen 21 has five layers of thickness and fineness, from top to bottom, a coarse mesh-a fine mesh-a coarse mesh, wherein the coarse mesh has a hole pitch of 10 × 10mm, the steel wire diameter is 1.2mm, and the fine mesh has a mesh size of 60 meshes.

In an alternative embodiment, the microfiltration tank system further comprises a holding flat steel 22; two ends of the bearing flat steel 22 are welded on a lower end socket 23 of the tank body main body 1, and the bearing flat steel 22 supports the stainless steel filter screen 21.

Specifically, in order to fix the stainless steel filter screen 21 in the tank body main body 1, a further bearing structure is needed, the bearing structure is designed to be parallel flat steel, two ends of the bearing structure are welded on the inner wall of the end socket, and the flat steel is made of stainless steel, has the width of 50mm, the thickness of 5mm and the distance of 25-50mm and is uniformly distributed after measurement and actual bearing verification.

As shown in fig. 4, 5, in an alternative embodiment, the microfiltration tank system further comprises a movable flange 24 and a fixed flange 25; the fixed flange 25 is connected with the lower end socket 23, the stainless steel filter screen 21 is arranged between the fixed flange 25 and the movable flange 24, the fixed flange 25 is provided with a harness cord bolt 26, and the movable flange 24 is connected with the harness cord bolt 26; an upper sealing ring 27 is arranged between the movable flange 24 and the stainless steel filter screen 21, and a lower sealing ring 28 is arranged between the fixed flange 25 and the stainless steel filter screen 21; the width dimension of the fixed flange 25 is 50-100 mm, the thickness dimension of the fixed flange 25 is 8-12 mm, and the welding harness cord bolts 26 are uniformly distributed along the circumferential direction of the fixed flange 25; the width dimension of the movable flange 24 is 60-100 mm, and the thickness dimension of the movable flange 24 is 8-12 mm.

Specifically, the width of the fixing flange 25 is 50-100 mm, the best width is 70mm, the thickness is 8-12 mm, and the best thickness is 10 mm. The harness cord bolts 26 are uniformly welded in the circumferential direction, the specification height of the harness cord bolts 26 meets the requirements of penetrating through the fixed flange 25 and the movable flange 24, the diameter is M12mm, a through hole is formed between the two bolts, the diameter of the through hole is 3 times or 30mm of that of the harness cord bolts 26, and the through hole is formed for smooth circulation of gas or water flow during backwashing, so that the filter material blocked by the flange plate can be conveniently flushed.

In order to facilitate the disassembly, the movable flange 24 is divided into 6 equal blocks, bolt holes of the movable flange 24 correspond to fixed flange bolts one by one, and vent holes correspond to fixed flange bolts one by one. The fixed flange 25 and the movable flange 24 have the same width, generally 60-100 mm, preferably 70 mm. The thickness is 8-12 mm, preferably 10 mm.

In an alternative embodiment, as shown in fig. 6 and 7, the support flat 22 has a cutout, in which the end face of the fastening flange 25 is located.

Specifically, because the stainless steel filter screen 21 is laid on the supporting flat steel 22, a plane is required, and square notches are formed in two ends of the supporting flat steel 22, and the size of each notch just accommodates the height and the width of the fixing flange 25.

In an alternative embodiment, the microfiltration tank system further comprises an upper baffle 29 and a lower baffle 30; the upper clapboard 29 is positioned above the stainless steel filter screen 21, the lower clapboard 30 is positioned below the stainless steel filter screen 21, and the upper clapboard 29 is connected with the bearing flat steel 22 through angle steel and bolts; the upper baffle plate 29 and the lower baffle plate 30 divide the lower head 23 into a plurality of backwashing channels.

Specifically, according to the baffle of subregion in low head 23, correspond and set up baffle 29 on stainless steel filter screen 21, highly 0.5 m is connected fixedly through angle steel and bolt and band steel, and its effect is: the stainless steel net is pressed to prevent upward deformation, the upper partition plate 29 corresponds to the lower partition plate 30, and the divided areas also correspond to each other, so that a backwashing channel is formed, gas can only concentrate upwards in the area in the partition plate to push the filter material to move upwards, a boiling state is formed locally, and the design effect of backwashing friction of the filter material is achieved.

In an alternative embodiment, the microfiltration tank system further comprises a water outlet line 31; the bottom of the tank body 1 is provided with a water outlet 32, the water outlet 32 is connected with a water outlet pipeline 31, and the water outlet pipeline 31 along the water outlet direction is sequentially provided with a water outlet valve 33, a pressure sensor 34 and a turbidity sensor 35.

Concretely, turbidity sensor 35 and outlet valve 33's cooperation realizes automatic control, when the play water turbidity risees, sensor electrical signal control outlet valve 33 closes for a short time, slow down the velocity of flow, because the slower turbidity of velocity of flow is lower, guarantee the settlement index of play water more easily, the valve closes little pressure and risees, then 34 electrical signal control of pressure sensor intake inverter pump 11 reduce frequency to this realizes the water yield and the quality of water coordinated control of producing water, when above-mentioned control still can not satisfy the quality of water requirement, turbidity sensor 35 automatic alarm or shut down, system steady operation has been guaranteed.

In an alternative embodiment, the microfiltration tank system further comprises a forward wash line 36; one end of the forward washing pipeline 36 is connected with the water outlet pipeline 31, the other end of the forward washing pipeline 36 is connected with the sewage drainage main pipe 9, and a forward washing valve 37 is arranged on the forward washing pipeline 36; the microfiltration tank system also includes a backwash water inlet line 38; the backwash water inlet pipe 38 is connected to the water outlet pipe 31, and the backwash water inlet pipe 38 is provided with a backwash water inlet valve 39.

In order to ensure high reliability of equipment operation, the design adopts an automatic and manual double-insurance design idea, a Programmable Logic Controller (PLC) is adopted for automatic control in the whole process, different operation sequences such as starting, stopping, backwashing and the like are executed according to set time, a backwashing program can be started and stopped manually at any time or started as appropriate, all automatic valves can be manually started, and therefore overhaul and equipment debugging are facilitated. The default standby state of the system is that all valves are closed, and the water inlet variable frequency pump 11 is closed.

The traditional backwashing starting conditions are as follows: when the pressure difference of inlet water and outlet water reaches a certain degree, the backwashing is started, the pressure difference is large, the accumulated dirt of the filter layer is enough, the influence is generated on the flow, the water flow short circuit dirt can also be caused to directly pass through the filter layer, the design idea is poor in the protection effect on the water quality, the backwashing needs more energy consumption to overcome the resistance to enough dirt, and the design idea of the scheme is as follows: the backwashing is started when the differential pressure is not large enough, the water quality is qualified, the differential pressure is small, the dirt is not large, the required backwashing energy consumption and the time process are reduced by 80 percent compared with the traditional mode, and the comprehensive effects of energy conservation, consumption reduction and water quality guarantee are achieved.

Description of the boot preparation procedure: and (3) opening the water inlet valve 12 and the variable frequency pump 11, simultaneously opening the forward washing valve 37 and the exhaust valve 7, closing other valves, and discharging the system running effluent through a drain pipe to reach a set time limit and enter a normal running program.

Description of normal operation procedure: and (3) opening the water inlet valve 12, the variable frequency pump 11, the water outlet valve 33 and the exhaust valve 7, closing other valves, normally operating the system, and exhausting the gas at regular time by the exhaust valve 7 according to set time.

Description of the backwash procedure: and (3) when the backwashing time is set, closing the variable frequency pump 11, closing all valves at the same time, recovering to a standby state, starting a backwashing program, or manually starting the backwashing program at any time, and opening the backwashing water inlet valve 39 and the sewage discharge valve, which is called reverse cleaning until 80% of the volume of the tank body is discharged. And (3) opening a sewage discharge valve connected with the first sewage discharge valve 10 and the upper sewage discharge port 3, closing the backwashing water inlet valve 39, and continuously discharging the stored water in the tank until the water level is equal to the first sewage discharge valve 10. Keeping a sewage valve connected with the upper sewage outlet 3 in an open state, closing the first sewage valve 10, opening a backflushing main air valve, closing the exhaust valve 7, and sequentially opening the backflushing air valves on the partitioned backflushing main air pipes 16, wherein each valve lasts for 10-30 seconds, preferably 15 seconds after being opened. This is called kickback. At the moment, the filter material boils in the tank body 1, so that the hardening of the filter material is prevented, meanwhile, the filter material in the tank body 1 is circulated up and down, and the deep dirt of the filter material floats upwards in the process. Keeping the sewage valve connected with the upper sewage outlet 3 in an open state, opening the backwashing water inlet valve 39 to enable the water surface in the tank to rise, simultaneously opening all backwashing air valves on each subarea backwashing main air pipe 16 to enable gas to be uniformly dispersed in the cross section area of the whole filter tank, reducing the boiling phenomenon of a filter layer at the moment, presenting a micro-expansion state, facilitating the deep dirt of the filter material to rise along with water flow, closing all backwashing air valves on each backwashing main air pipe 16 when the water surface reaches a distance of 0.5 m from the top of the seal head, keeping the water surface to continue rising, further discharging from the sewage valve connected with the upper sewage outlet 3, ending the backwashing at a set time, and recovering to a standby state of closing all valves.

The backwashing water is from a clean water tank for water production of a microfiltration tank system, the backwashing water quantity is 2L/square meter s, the required water pump flow can be calculated according to the diameter of the specific microfiltration tank, the lift of the water pump is 10-15 m or 5m higher than the whole height of the microfiltration tank, and the general empirical value is 15 m.

In addition, the tank body main body 1 and the end enclosure are made of stainless steel or carbon steel for corrosion prevention, all internal structural components are made of 304 stainless steel and comprise an upper partition plate, a lower partition plate, a fixed flange 24, a movable flange 24, bolts, flat steel and a coarse and fine filter screen, and a system pipeline is made of carbon steel for corrosion prevention or steel lining plastic or U-PVC water supply pressure-bearing pipeline fittings.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A microfiltration tank system, comprising: the tank body main body and the sand stopper;

2. The microfiltration tank system according to claim 1,

3. The microfiltration tank system according to claim 1,

4. The microfiltration tank system according to claim 3,

5. The microfiltration tank system according to claim 4,

6. The microfiltration tank system according to claim 1,

the micro-filtration tank system also comprises a choke coil;

7. The microfiltration tank system according to claim 1,

the filter material layer is made of any one of a manually sintered microporous ceramic filter material, a volcanic filter material, quartz sand, anthracite, ceramsite or activated carbon.

8. The microfiltration tank system according to claim 1,

9. The microfiltration tank system according to claim 8,

10. The microfiltration tank system according to claim 1,

11. The microfiltration tank system according to claim 10,

the micro-filtration tank system also comprises a bearing flat steel;

12. The microfiltration tank system according to claim 11,

13. The microfiltration tank system according to claim 12,

14. The microfiltration tank system according to claim 12,

15. The microfiltration tank system according to claim 12,

16. The microfiltration tank system according to claim 1,

the microfiltration tank system also comprises a water outlet pipeline;

17. The microfiltration tank system according to claim 16,

the micro-filtration tank system also comprises a forward washing pipeline;

18. The microfiltration tank system according to claim 16,