CN209923002U

CN209923002U - W-shaped filter brick for biological aerated filter

Info

Publication number: CN209923002U
Application number: CN201920242886.9U
Authority: CN
Inventors: 蔡文; 孙召强; 祁淑敏; 王忠民; 张阳
Original assignee: CSD WATER SERVICE Co Ltd
Current assignee: CSD WATER SERVICE Co Ltd
Priority date: 2019-02-26
Filing date: 2019-02-26
Publication date: 2020-01-10
Anticipated expiration: 2029-02-26

Abstract

The utility model provides a W-shaped filter brick for an aeration biological filter, which is square and comprises a first cavity extending from the bottom to the top of the filter brick, wherein the cross section area of the first cavity is gradually reduced from bottom to top; the lateral direction of the first chamber is provided with a pore plate with a plurality of openings, a partition plate is arranged between the middle position of the pore plate and the top wall of the filter brick, the pore plate is divided into an upper pore plate part and a lower pore plate part at the joint of the pore plate and the partition plate, and the top wall is divided into a first top wall part and a second top wall part at the joint of the top wall and the partition plate; the lower hole plate part, the side wall of the filter brick, the first top wall part and the partition plate form a second chamber, the first top wall part is provided with openings, and the first top wall part is adjacent to the side wall; the upper hole plate part, the second top wall part and the partition plate form a third chamber, the second top wall part is provided with an opening, the partition plate separates the second chamber from the third chamber, and the left partition plate, the left upper hole plate part, the right upper hole plate part and the right partition plate in the filter brick are of a roughly W-shaped structure.

Description

W-shaped filter brick for biological aerated filter

Technical Field

The utility model relates to the field of sewage treatment, in particular to a W-shaped filter brick for a biological aerated filter.

Background

A Biological Aerated Filter (BAF) is a novel Biological membrane method sewage treatment process developed in Europe and America at the end of 80 years, is greatly developed in the beginning of 90 years, has the maximum scale of dozens of thousands of tons per day, and can be developed into nitrogen and phosphorus removal.

The aeration biological filter tank in the prior art mainly adopts a water and gas distribution system of a whole-pouring filter plate and a filter head, the filter head is fixedly arranged on the whole filter plate, and backwashing air and backwashing water enter and are mixed together from the lower part of the filter head and then are discharged from a filter cap at the upper part of the filter head during backwashing. The following problems can occur in the construction and operation of the system: civil engineering and installation construction are complex, construction period is long, and construction precision is not easy to guarantee; a filtering chamber with the height of 1 meter needs to be arranged below the filtering plate and is used for installing an air distribution pipeline and daily maintenance, so that the filtering chamber occupies larger volume of the tank body but does not play a role in removing pollutants, and the filtering chamber belongs to volume waste. The filter is only provided with 36 water and gas distribution points per square meter, and the backwashing strength is uneven because of less water and gas distribution points. The filter head is easy to be damaged or blocked during operation, so that the backwashing strength is uneven, and the operation effect of the filter tank is influenced.

The filter brick structure in the prior art can only be used for a common filter pool or a deep bed filter pool for down-flow filtration, and only water passes through the filter bricks from top to bottom when the common filter pool or the deep bed filter pool is down-flow filtered. During backwashing, backwashing water and backwashing gas simultaneously pass through the filter bricks from bottom to top. Because the aeration biological filter tank needs continuous aeration during working, the existing filter bricks can not realize aeration well and can realize downward flowing water filtration.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems of the prior art, the present disclosure provides a W-shaped filter brick for a biological aerated filter, wherein the filter brick is square, the filter brick comprises a first chamber with an open bottom, the first chamber extends from the bottom of the filter brick to the top of the filter brick, the cross-sectional area of the first chamber is gradually reduced from bottom to top, and the first chamber is used for accommodating an outlet end of a gas and water distribution system; the lateral direction of the first chamber is provided with a pore plate with a plurality of openings, a separation plate is arranged between the middle position of the pore plate and a top wall of the filter brick, the pore plate is divided into an upper pore plate part and a lower pore plate part at the joint of the pore plate and the separation plate, and the top wall is divided into a first top wall part and a second top wall part at the joint of the top wall and the separation plate; the lower hole plate part, the side wall of the filter brick, the first top wall part and the partition plate form a second chamber, the first top wall part is provided with openings, and the first top wall part is adjacent to the side wall; the upper orifice plate part, the second top wall part and the separation plate form a third chamber, the second top wall part is provided with an opening, and the separation plate separates the second chamber from the third chamber; the left partition plate, the left upper perforated plate portion, the right upper perforated plate portion, and the right partition plate of the filter block have a substantially W-shaped structure.

Preferably, in one embodiment of the filter block according to the present disclosure, the top of the first chamber of the filter block may be a closed top plate. Preferably, the ceiling of the first chamber is lower than the first and second ceiling portions.

Preferably, in the filter block for a biological aerated filter according to the present disclosure, the filter block may have a rectangular parallelepiped configuration, the first chamber is located at a central position of a bottom of the filter block and extends longitudinally, the filter block is symmetrically provided with a left side partition plate and a right side partition plate at both sides of the first chamber, and the filter block is further symmetrically provided with a left side second chamber and a left side third chamber and a right side second chamber and a right side third chamber at both sides of the first chamber.

Preferably, in the filter block according to the present disclosure, the width of the second top wall portion is greater than the width of the first top wall portion; preferably, the outer periphery of the top wall of the filter block is provided with a raised rib.

According to the utility model discloses a filter brick, the beneficial effect that can obtain includes at least:

1. the utility model discloses a filter brick can carry out the function with the up end space and the inner space of filter brick and distinguish, and the creative make filter brick can be applied to the biological aerated filter.

2. The utility model discloses a filter brick can go on simultaneously upwards to the aeration, downwards to crossing water, satisfies the operating condition requirement in bological aerated filter to make the filter brick not only can be used for ordinary filtering pond or deep bed filtering pond, also can apply to bological aerated filter simultaneously, enlarged the application range of filter brick.

3. The utility model discloses a filter brick is applied to the biological aerated filter, can overcome the defect that adopts the water distribution gas distribution system of whole filter plate and filter head among the prior art.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, as claimed.

Drawings

Further objects, functions and advantages of the present invention will become apparent from the following description of embodiments of the present invention, with reference to the accompanying drawings, in which:

FIG. 1 schematically illustrates a vertical cross-sectional view of one embodiment of a filter block for a biological aerated filter according to the present disclosure;

FIG. 2 is a schematic view of a filter block according to the present disclosure having an aerator tube disposed within a first chamber thereof;

FIG. 3 is a schematic view of the operational principle of a filter block according to an embodiment of the present invention;

fig. 4 is the schematic view of the working state of the filter brick of the present invention, fig. 4a is the schematic view of the air-water state of the filter brick during filtration, and fig. 4b is the schematic view of the air-water state of the filter brick during backwashing.

Detailed Description

The objects and functions of the present invention and methods for accomplishing the same will be apparent by reference to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in different forms. The nature of the description is merely to assist those skilled in the relevant art in a comprehensive understanding of the specific details of the invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.

As shown in fig. 1 to 2, a vertical cross-sectional view of one embodiment of a filter block for a biological aerated filter according to the present disclosure is schematically shown.

In the illustrated filter block for a biological aerated filter, the block is square and comprises a first chamber 53 open at the bottom, which extends from the bottom of the block to the top of the block. The cross-sectional area of the first chamber 53 is gradually reduced from bottom to top. As shown in fig. 2, the first chamber 53 is used for accommodating an outlet end of the distribution system; the first chamber is laterally provided with a perforated plate 20 having a plurality of openings, the filter bricks are provided with a partition plate 31 between a middle position of the perforated plate 20 and a ceiling wall, the perforated plate 20 is divided into an upper perforated plate portion 22 and a lower perforated plate portion 21 at a junction with the partition plate 31, and the ceiling wall is divided into a first ceiling wall portion 11 and a second ceiling wall portion 12 at a junction with the partition plate 31. Wherein the lower orifice plate portion 21, the side walls 41 of the filter bricks, the first top wall portion 11 and the partition plate 31 form a second chamber 51, the first top wall portion 11 being provided with an opening. The first top wall portion 11 is adjacent to the side wall 41. The upper orifice portion 22, the second top wall portion 12, and the partition plate 31 form a third chamber 52, the second top wall portion 12 is provided with an opening, and the partition plate 31 partitions the second chamber 51 from the third chamber 52. The left partition plate, the left upper perforated plate portion, the right upper perforated plate portion, and the right partition plate of the filter block have a substantially W-shaped structure. Wherein the first and second chambers are each for fluid flow therethrough.

Preferably, in one embodiment of the filter block according to the present disclosure, the top of the first chamber 53 of the filter block may be a closed top plate. Preferably, the ceiling of the first chamber 53 is lower than the first and

second ceiling walls

11, 12.

Preferably, in the filter block for a biological aerated filter according to the present disclosure, the filter block may have a rectangular parallelepiped configuration, the first chamber 53 is located at the center of the bottom of the filter block and extends longitudinally, the left and right partition plates are symmetrically disposed at both sides of the first chamber 53, and the left and right second and third chambers are also symmetrically disposed at both sides of the first chamber.

Preferably, in the filter block according to the present disclosure, the width of the second top wall portion 12 is greater than the width of the first top wall portion 11; preferably, the outer periphery of the top wall of the filter block is provided with a raised rib.

In the example shown in fig. 1, for example in a square or rectangular configuration of the block, the central portion of the top wall 10 of the block may be recessed downwardly to form a central recess 13, with the first chamber of the block in the middle and the lower portion being two orifice plates 20 which are inclined inwardly and form an open diverging trapezoidal channel configuration. The orifice plate 20 abuts the central depression 13 of the top wall 10.

In a preferred embodiment of the filter block according to the present disclosure, the filter block is of a square configuration or is in a rectangular parallelepiped configuration, shown in an end elevation view in fig. 1. As shown in the drawings, the block comprises left and right halves symmetrically arranged along its central axis, the interior of each of the left and right halves being divided into two separate chambers by a partition plate 31, the partition plate 31 extending from the top wall 10 of the block to the waist of the aperture plate 20 at a predetermined distance from the side wall (e.g. 41) adjacent to the block.

Two chambers in the left half part and the right half part can be a second chamber 51 and a third chamber 52 respectively, and a trapezoidal groove sandwiched between the left half part and the right half part is configured as a first chamber 53.

The second chamber 51 is the cavity between the first top wall 11 of the brick, the side wall 41 of the brick, the lower perforated plate 21 and the partition plate 31, i.e. the chamber inside the left and right halves and outside the partition plate 31 is the second chamber 51.

Wherein the cavity between the second top wall part 12 of the filter brick, the partition plate 31, the upper orifice plate part 22 and the central depression 13 of the upper end face is a third chamber 52, i.e. the chamber inside the left and right halves and inside the partition plate 31 is the third chamber 52.

As shown in fig. 1, the first top wall 11 and the second top wall 12 are arranged such that the first top wall 11 is an outer portion of the upper end face 10 of the filter block, and the second top wall 12 is an intermediate portion. The boundary position may be a connection position between the upper end surface 10 and the partition plate 31. Similarly, the boundary position between the lower orifice plate portion 21 and the upper orifice plate portion 22 is the connection position between the orifice plate 20 and the partition plate 31. The central depression 13 of the upper end face can serve to reinforce the strength of the connection with the orifice plate 20.

In this embodiment, the upper end face 10 of the filter block, the orifice plate 20, have openings 14, the partition plate 31 is not open, and the partition plate is made of a water-impermeable and gas-impermeable material. Preferably, the middle recess 13 of the upper end surface of the filter brick can be provided with a hole, and the side wall 41 and the side surface opposite to the side wall are not provided with holes, so that the air and water flow direction is ensured to flow in the up-down direction.

In this embodiment, the utility model discloses a filter brick adopts the inside technique that increases division board 31 at the filter brick under the prerequisite that does not influence the result of use, carries out functional differentiation with filter brick surface space and inside cavity. When the device is operated, the air path and the water path are not affected each other. And during backwashing, air and water flow in the same direction, so that the air and water are discharged from gaps between the partition plates simultaneously without air resistance. The backwashing effect is not influenced.

In the above embodiment, the width of the second chamber 51 at the first top wall portion 11 is smaller than the width of the third chamber 52 at the upper end face middle section 12. That is, the area of the second chamber 51 occupying the upper end surface 10 is smaller than the area of the third chamber 52, that is, the width of the first top wall portion 11 is smaller than the width of the second top wall portion 12, which is favorable for sufficient aeration of the sewage. In other embodiments, the ratio of the second chamber 51 and the third chamber 52 to the upper end surface 10 can be adjusted according to practical applications and requirements, for example, the two chambers are equal or have the same size. Similarly, the position of the joint of the partition plate 31 on the orifice plate 20 can be adjusted according to the requirement.

In the embodiment shown in the figures, the block may be of generally rectangular parallelepiped configuration, the upper face 10 of the block may be provided on either side with raised ribs and the lower end of the block with horizontal feet.

The utility model discloses an inside like letter W of filter brick, also can be called W type filter brick, optimize internal mechanism on original filter brick basis, increase the division board. The gap part and the inner cavity part on the upper surface of the filter brick are partitioned according to the functions of downward water passing and upward aeration. The filter brick of the utility model has the functional technical characteristics of upward aeration and downward water passing at the same time, and is applicable to the biological aerated filter. The filter brick of the utility model can be applied to an aeration biological filter, a common filter and a deep bed filter.

The benefits of the filter block according to the present disclosure are further explained in connection with fig. 3 and 4.

In the biological aerated filter provided with the filter bricks according to the present disclosure, when the biological aerated filter is in normal operation, air enters the filter bricks through the air pipes, and then exits the filter bricks through the gap (the third chamber 52) between the two partition plates 31 to oxygenate the biological aerated filter. The water flowing downward flows downward through the filter bricks from the space (second chamber 51) outside the brick divider plate. Namely, the inner gap of the W-shaped filter brick is used for air passing, the gap at the outer side of the W-shaped filter brick is used for water passing, air and water run in a shunt way, air resistance is not generated, and mutual interference is avoided. During aeration, air is discharged from the middle gap (third chamber 52) from bottom to top at a proper air flow and pressure.

The fluid has a characteristic of selecting a path having the least resistance to flow. The middle gap (third chamber 52) is aerated from bottom to top, and if the water body also reversely flows from top to bottom from the middle gap (third chamber 52), the water body has great resistance, so the water body can select the side gap (second chamber 51) with small resistance to flow from top to bottom. During aeration, an air-water interface is formed in the first chamber 53 (fig. 3 shows only the air-water interface during backwashing), and since the gas is in the upper portion and the water is in the lower portion, the gas is discharged only through the upper air holes. Figure 3 shows only the air-water interface at backwash,

will the utility model discloses a during the biological aerated filter backwash that filter brick was used, gaseous still by following the space (third chamber 52) discharge in the middle of the division board 31, the water then by the whole space (second chamber 51 and third chamber 52) discharge in filter brick surface, because the gas-water all is discharged from bottom to top during the backwash, does not have the problem of gas-water reverse flow and air resistance.

Alternatively, in another embodiment of a filter block for a biological aerated filter according to the present disclosure, the block may have a cylindrical configuration with a hexagonal cross-section, the second and third chambers being configured to surround the first chamber; the width of the second top wall portion is greater than the width of the first top wall portion.

Still preferably, in a specific embodiment of the biological aerated filter according to the disclosure, the upper part of the biological aerated filter is provided with a water inlet, the middle part is provided with a filter layer, and the bottom part is provided with a water outlet; when the biological aerated filter is aerated, oxygenated air is discharged upwards from the aeration pipe and the short branch pipe through the upper orifice plate part, the third chamber and the upper end surface of the filter brick; the sewage flows out downwards through the upper end surface of the filter brick, the second chamber and the lower orifice plate; when the biological aerated filter is used for backwashing, backwashing gas air is discharged upwards from the aeration pipe and the short branch pipe through the upper hole plate part, the third chamber and the upper end surface of the filter brick, and backwashing water is discharged upwards from bottom to top through the hole plate, the third chamber, the second chamber and the upper end surface of the filter brick.

The aeration system in the biological aerated filter can also comprise an air pipe form adopting other modes and a matched air supply device. The filter bricks can also be distributed in rows or in a staggered way of multiple rows and multiple columns.

As shown in the schematic diagram of air-water state in FIG. 4a, when the biological aerated filter is aerated, the oxygenated air is discharged upwards from the aeration pipe and the short branch pipe through the upper orifice plate part, the third chamber and the upper end surface of the filter brick; and sewage flows downwards through the upper end surface of the filter brick, the second chamber and the lower orifice plate.

As shown in the schematic diagram of air-water state in FIG. 4b, during the backwashing of the biological aerated filter, the backwashing air is discharged upwards from the aeration pipe and the short branch pipe through the upper orifice plate part, the third chamber and the upper end surface of the filter brick, and the backwashing water is discharged upwards from bottom to top through the orifice plate, the third chamber, the second chamber and the upper end surface of the filter brick.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

Claims

1. A W-shaped filter brick for an aeration biological filter is characterized in that,

the filter brick is square and comprises a first cavity with an open bottom, the first cavity extends from the bottom of the filter brick to the top of the filter brick, and the cross section area of the first cavity is gradually reduced from bottom to top;

the lateral direction of the first chamber is provided with a pore plate with a plurality of openings, a separation plate is arranged between the middle position of the pore plate and a top wall of the filter brick, the pore plate is divided into an upper pore plate part and a lower pore plate part at the joint of the pore plate and the separation plate, and the top wall is divided into a first top wall part and a second top wall part at the joint of the top wall and the separation plate;

the lower hole plate part, the side wall of the filter brick, the first top wall part and the partition plate form a second chamber, the first top wall part is provided with openings, and the first top wall part is adjacent to the side wall;

the upper orifice plate part, the second top wall part and the separation plate form a third chamber, the second top wall part is provided with an opening, and the separation plate separates the second chamber from the third chamber;

the left partition plate, the left upper perforated plate portion, the right upper perforated plate portion, and the right partition plate of the filter block have a substantially W-shaped structure.

2. The filter brick of claim 1 wherein the top of the first chamber is a closed top panel.

3. The filter brick of claim 2 wherein the ceiling of the first chamber is lower than the first and second ceiling walls.

4. A filter block as claimed in claim 2 or 3, wherein the block is of rectangular parallelepiped configuration, the first chamber is centrally located in the bottom of the block and extends longitudinally, the block has a left side and a right side symmetrically disposed on either side of the first chamber, and the block has left and right side second and third chambers symmetrically disposed on either side of the first chamber.

5. The block of claim 4, wherein the second top wall portion has a width greater than a width of the first top wall portion.

6. The block as claimed in claim 5, wherein the top wall of the block is provided with a raised rib on its outer periphery.