Filter brick for denitrification deep-bed filter

Abstract

The invention belongs to the technical field of urban sewage treatment, and relates to a filter brick for a denitrification deep-bed filter. A plurality of clamping blocks are formed on one side wall surface of the brick body, and a clamping groove matched with the clamping blocks is formed on the other side wall surface of the brick body. The clamping block and the clamping groove are tightly buckled with inclined surfaces. During operation, the clamping block on the side wall surface of one brick body is inserted into the clamping groove on the side wall surface of the adjacent brick body, the clamping block and the clamping groove are buckled to form a clamping body, and the two brick bodies are tightly matched and connected. The movement of the single filter brick in the three-dimensional direction is well limited, and the filter bricks are conveniently aligned and installed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of urban sewage treatment and relates to a filter brick for a denitrification deep-bed filter. BACKGROUND

[0002] The denitrification deep-bed filter is a deep treatment unit integrating biological denitrification and filtration functions. The denitrification deep-bed filter uses large-diameter thick-layer filter material of special specifications and shapes as a biofilm medium for denitrification bacteria. With an external carbon source, the denitrification deep-bed filter can remove suspended solids, phosphorus and nitrogen. Without the external carbon source, the denitrification deep-bed filter is a deep-bed filter that can remove suspended solids and phosphorus at the same time.

[0003] The core technology of the denitrification deep-bed filter is the backwashing water distribution and air distribution system at the bottom of the filter. The current water distribution and air distribution system of the denitrification deep-bed filter mainly includes three forms: W-shaped air and water distribution brick, double-layer water distribution and air distribution V-shaped filter brick and long-handle filter head filter plate. The W-shaped air and water distribution brick has a relatively simple structure and a relatively low cost, and is most widely used.

[0004] The W-shaped air and water distribution brick mainly uses a high-density polyethylene shell filled with concrete. The shell has a pressure buckle locking structure on both sides, so that when the air and water distribution bricks are arranged side by side, the bricks are locked with each other through the pressure buckle, and an open gap is left between the bricks. The cavity formed by the W-shaped structure at the bottom of the brick allows the filtered water to flow through and distributes independent backwashing air pipes. During backwashing, the backwashing air and water are mixed in the cavity of the brick, and then flow out from the gap between the bricks, so as to achieve uniform water distribution and air distribution.

[0005] During backwashing, the air and water flow back against the bricks, which can easily cause the bricks to be misaligned with each other. In the existing deep-bed filter, several types of filter bricks have been used. For example, in the system and method of interlocking support blocks (application number: CN 200680052832, application date: February 15, 2006) applied by Siviter Lent Water Purification Co., Ltd., two locking bodies are used to lock adjacent blocks. In actual use, the second locking body is difficult to buckle and is similar to a virtual one. In the filter brick and filter pool water distribution and air distribution system (application number: CN 201821500508, application date: September 13, 2018) applied by Guizhou Shuaiyihuanbao Technology Co., Ltd., three fitting components are used to fix adjacent blocks. Although the existing designs can provide a certain backflow stability, the multiple locking forms are relatively complex, and in actual use, either the installation is difficult, or even if the installation is completed, the locking of part of the locking components is not firm. In addition, because the components are relatively complex, the cost is also relatively high. SUMMARY

[0006] The purpose of this invention is to provide a filter brick that solves the problem of poor three-dimensional stability caused by weak interconnection of filter bricks in the prior art. To achieve the above objective, this invention provides a locking block and slot fastening system that limits the three-dimensional movement of the filter brick.

[0007] The filter brick comprises a strip-shaped brick body with a first side wall and a second side wall along its length, a first end wall and a second end wall along its width, as well as a top surface and a bottom surface. The brick body is hollow inside, with the top surface open to form a filling groove, and the bottom surface protruding to form several brick feet. The brick feet are symmetrically arranged, and a flow channel is formed between adjacent brick feet. The brick feet at both ends of the brick body along its length are shorter than the brick feet in the middle. The filling groove is filled with concrete. The surface of the first side wall protrudes to form several locking blocks, and the surface of the second side wall protrudes to form locking grooves that fit the locking blocks. The locking blocks and locking grooves are inclined and tightly interlocked. During operation, the locking blocks of one brick body are inserted into the locking grooves of another brick body, and the locking blocks and locking grooves interlock to form a locking body, and the two brick bodies are tightly connected.

[0008] The filter brick for a denitrification deep bed filter described above has an inwardly inclined groove bottom and a locking block that fits into the groove.

[0009] The filter brick for a denitrification deep bed filter described above has a transition slope at the connection between the first sidewall, the second sidewall, the first endwall, and the second endwall and the top surface.

[0010] The filter brick for a denitrification deep bed filter described above, wherein the brick feet, adjacent brick feet, and the bottom surface of the brick body together form an arch shape.

[0011] The filter brick for a denitrification deep bed filter described above has two locking blocks, which are equidistantly arranged on the surface of the first side wall.

[0012] The filter brick for a denitrification deep bed filter described above has several protrusions arranged parallel to the center lines of the first and second sidewall surfaces of the brick. When two bricks are tightly engaged and connected, the protrusions push against each other, forming a flow channel between the sidewalls of adjacent bricks.

[0013] The filter brick for a denitrification deep bed filter described above has 8-12 brick feet.

[0014] The filter brick for a denitrification deep bed filter described above is made of plastic.

[0015] The filter brick for a denitrification deep bed filter described above is preferably made of high-density polyethylene.

[0016] The filter brick for a denitrification deep bed filter described above has a thickness of 2 mm to 3 mm.

[0017] The filter brick for a denitrification deep bed filter described above has a packing groove whose length direction is consistent with the length direction of the brick body, and the packing groove of the brick body is provided with longitudinal or transverse convex strips.

[0018] The filter brick for a denitrification deep bed filter described above can have the brick body and the raised strips as an integral structure.

[0019] Compared with the prior art, the filter bricks for denitrification deep bed filter provided by the present invention are connected by clamping blocks and grooves with inclined surfaces to form a clamping body. With the help of the weight of the bricks themselves, two bricks are tightly connected and adjacent bricks are connected to form an array, and the movement of a single brick in three dimensions is well restricted. Attached Figure Description

[0020] Figure 1 This is a top view of two filter bricks connected together in this denitrification deep bed filter.

[0021] Figure 2 This is a front view of the filter bricks used in this denitrification deep bed filter.

[0022] Figure 3 This is a three-dimensional view of the filter bricks used in this denitrification deep bed filter, showing the card components.

[0023] Figure 4 This is a right view of the filter bricks used in this denitrification deep bed filter.

[0024] Figure 5 This is a three-dimensional view of the filter bricks used in this denitrification deep bed filter, showing the header.

[0025] In the diagram, 1. brick body; 2. first side wall; 3. second side wall; 4. first end wall; 5. second end wall; 6. top surface; 7. bottom surface; 8. locking body; 81. locking block; 82. locking groove; 9. filling groove; 10. brick foot; 11. protrusion; 12. protrusion strip. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] These filter bricks are laid at the bottom of the denitrification deep bed filter tank, such as... Figures 1-5 As shown, it includes 1. brick body; 2. first side wall; 3. second side wall; 4. first end wall; 5. second end wall; 6. top surface; 7. bottom surface; 8. locking body; 81. locking block; 82. locking groove; 9. filling groove; 10. brick foot; 11. protrusion; 12. protrusion strip.

[0028] Example 1

[0029] The filter bricks used in denitrification deep bed filters are strip-shaped, with a first sidewall 2 and a second sidewall 3 along their length, a first endwall 4 and a second endwall 5 along their width, and a top surface 6 and a bottom surface 7. The brick material is plastic. The bottom surface 7 of the brick 1 protrudes to form several brick feet 10, which are symmetrically arranged about the center line along the length of the brick 1. The brick feet 10, together with adjacent brick feet and the bottom surface of the brick, form an arch-shaped flow channel. The brick feet at both ends of the brick are shorter than those in the middle, allowing the brick to form a sufficiently large flow channel with adjacent bricks end-to-end.

[0030] The brick body 1 is hollow inside, with an opening 6 on its top surface forming a filling groove 9. The filling groove 9 is strip-shaped, and its length direction is consistent with the length direction of the brick body 1. The filling groove is filled with concrete. The surface of the first sidewall 2 of the brick body 1 has protrusions forming several locking blocks 81, and the surface of the second sidewall 3 of the brick body 1 has protrusions forming locking grooves 82 that match the locking blocks. The locking blocks and locking grooves are beveled and tightly interlocked. During operation, the locking block 81 on the sidewall surface of one brick body is inserted into the locking groove 82 on the sidewall surface of the adjacent brick body. The locking block and locking groove interlock to form a locking body 8, and the two brick bodies are tightly connected.

[0031] The interlocking connection 8 formed by adjacent bricks allows the filter bricks to be arranged neatly in a row or repeatedly in an array. The simple interlocking connection 8 facilitates the alignment of the filter bricks and securely restricts their movement in both vertical and horizontal directions, making installation convenient and ensuring uniform water and air distribution.

[0032] Example 2

[0033] The filter brick 1 used in the denitrification deep bed filter is strip-shaped, with a first sidewall 2 and a second sidewall 3 along its length, a first endwall 4 and a second endwall 5 along its width, and a top surface 6 and a bottom surface 7. The brick material is high-density polyethylene with a thickness of 2 mm-3 mm. A transition slope is provided at the junction of the surfaces of the first sidewall 2, second sidewall 3, first endwall 4, and second endwall 5 with the top surface. The bottom surface 7 of the brick 1 protrudes to form several brick feet 10, which are symmetrically arranged about the center line along the length of the brick 1. The brick feet at both ends are shorter than those in the middle, and the brick feet 10, together with adjacent brick feet and the bottom surface of the brick, form an arch-shaped flow channel.

[0034] The brick body 1 is hollow inside, with an open top surface 6 forming a filling groove 9. The filling groove 9 is strip-shaped, and its length direction is consistent with the length direction of the brick body 1. The filling groove 9 is provided with several longitudinal or transverse protrusions 12. The protrusions 12 increase the strength of the brick body sidewalls. The filling groove 9 is filled with concrete.

[0035] Several protrusions 11 are provided parallel to the centerline of the first and second sidewall surfaces of brick body 1. When two brick bodies are tightly engaged, the protrusions abut against each other, forming a flow channel between the sidewalls of adjacent brick bodies. Several locking blocks 81 are formed by protrusions on the surface of the first sidewall 2 of brick body 1. The shape of the locking blocks can be T-shaped, wedge-shaped, or fan-shaped. The surface of the second sidewall 3 of brick body 1 is formed by protrusions forming locking grooves 82 that engage with the locking blocks. The locking blocks and locking grooves are tightly engaged at an angle. When a locking block 81 of one brick body's sidewall is inserted into the locking groove 82 of an adjacent brick body's sidewall, the locking block and locking groove engage to form a locking body 8, and the two brick bodies are tightly connected.

[0036] The interlocking connection 8 formed by adjacent bricks allows the filter bricks to be arranged neatly in a row or in a reciprocating array. The simple interlocking connection 8 facilitates the alignment of the filter bricks. During backwashing, air and water are thoroughly mixed in the bottom channel and then sprayed out through the sidewall channels. The interlocking array of filter bricks firmly restricts the movement of individual filter bricks in both vertical and horizontal directions, resulting in uniform water and air distribution.

[0037] Example 3

[0038] The filter brick 1 of the denitrification deep bed filter is strip-shaped, and has a first sidewall 2 and a second sidewall 3 along the length direction, a first endwall 4 and a second endwall 5 along the width direction, as well as a top surface 6 and a bottom surface 7. The brick can be a one-piece structure, which can be made of high-density polyethylene by injection molding in one piece, with a thickness of 2 mm. The surfaces of the first sidewall 2, the second sidewall 3, the first endwall 4 and the second endwall 5 are provided with transition slopes at the junction with the top surface.

[0039] The bottom surface 7 of the brick body 1 protrudes to form twelve brick feet 10. In actual production, the number can be adjusted to eight or ten. The brick feet 10 are arranged symmetrically on the left and right sides of the center line of the length direction of the brick body 1. The brick feet 10, together with the adjacent brick feet and the bottom surface of the brick body, form an arch-shaped flow channel. The brick feet at both ends of the brick body are shorter and the brick feet in the middle are longer, so that a sufficiently large flow channel is formed between the brick body and the brick bodies adjacent to each other end to end.

[0040] The brick body 1 is hollow inside, with an opening on the top surface 6 forming a filling groove 9. The filling groove 9 is strip-shaped, and its length direction is consistent with the length direction of the brick body 1. The filling groove 9 has three transverse protrusions 12. In actual production, the number can be adjusted to five or seven. The protrusions 12 increase the firmness between the first and second side walls of the brick body. The filling groove is filled with concrete.

[0041] Several protrusions 11 are provided parallel to the center lines of the first and second sidewall surfaces of the brick body 1. When the two brick bodies are tightly engaged and connected, the protrusions push against each other, and a flow channel is formed between the sidewalls of adjacent brick bodies.

[0042] Two slots 82 protrude from the surface of the second sidewall 3 of brick 1, equidistant from each other, with the bottom of the slots inclined inwards. Two blocks 81 protrude from the surface of the first sidewall 2 of brick 1 to form matching slots, the number of blocks being the same as the number of slots. The blocks and slots are tightly interlocked at an angle. During operation, a block 81 on the sidewall surface of one brick is inserted into a slot 82 on the sidewall surface of an adjacent brick, the block and slot tightly interlocking to form a locking body 8, and the two bricks are tightly connected.

[0043] The interlocking connection 8 formed by adjacent bricks allows the filter bricks to be arranged neatly in a row or in a reciprocating array. The simple interlocking connection 8 facilitates the alignment of the filter bricks. During backwashing, air and water are thoroughly mixed in the bottom channel and then sprayed out through the sidewall channels. The interlocking array of filter bricks firmly restricts the movement of individual filter bricks in both vertical and horizontal directions, resulting in uniform water and air distribution.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, which is obvious to those skilled in the art. Therefore, modifications and improvements made without departing from the spirit of the invention are all within the scope of protection claimed by the invention. Although this document frequently uses terms such as brick body 1, first sidewall 2, second sidewall 3, first endwall 4, second endwall 5, top surface 6, bottom surface 7, locking body 8, locking block 81, locking groove 82, filling groove 9, brick foot 10, protrusion 11, and protrusion 12, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A filter brick for a denitrification deep bed filter, comprising a strip-shaped brick body, the brick body having a first side wall and a second side wall along its length, a first end wall and a second end wall along its width, and a top surface and a bottom surface; the brick body is hollow inside, the top surface is open to form a filling groove, and the bottom surface protrudes to form a plurality of brick feet, the brick feet being symmetrically arranged, with flow channels formed between adjacent brick feet; the brick feet at both ends of the brick body are shorter than the brick feet in the middle; the filling groove is filled with concrete, characterized in that... The second sidewall surface of the brick has two raised slots, which are equidistant and slope inward at the bottom. The first sidewall surface of the brick has two raised blocks that match the slots. The number of blocks is the same as the number of slots. The blocks and slots are tightly interlocked on an inclined plane. During operation, a block on the sidewall surface of one brick is inserted into a slot on the sidewall surface of an adjacent brick. The block and slot are tightly interlocked to form a locking body, and the two bricks are tightly connected. The first and second sidewall surfaces of the brick have several protrusions parallel to the centerline. When the two bricks are tightly connected, the protrusions push against each other, forming a flow channel between the sidewalls of adjacent bricks.

2. The filter brick for a denitrification deep bed filter as described in claim 1, characterized in that, The surfaces of the first sidewall, the second sidewall, the first endwall, and the second endwall are provided with transition slopes at the connection with the top surface.

3. The filter brick for a denitrification deep bed filter as described in claim 1, characterized in that, The brick feet, together with the adjacent brick feet and the bottom surface of the brick body, form an arch shape.

4. The filter brick for a denitrification deep bed filter as described in claim 1, characterized in that, The number of brick feet is 8-12.

5. The filter brick for a denitrification deep bed filter as described in claim 1, characterized in that, The brick material is plastic.

6. The filter brick for a denitrification deep bed filter as described in claim 5, characterized in that, The brick material is high-density polyethylene with a thickness of 2 mm-3 mm.

7. The filter brick for a denitrification deep bed filter as described in claim 1, characterized in that, The length direction of the filling groove is consistent with the length direction of the brick body, and the filling groove of the brick body is provided with longitudinal or transverse protrusions.

8. The filter brick for a denitrification deep bed filter as described in claim 7, characterized in that, The brick body and the raised strip are an integral structure.

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