CN111957081A - Water distribution system of filter tank - Google Patents
Water distribution system of filter tank Download PDFInfo
- Publication number
- CN111957081A CN111957081A CN202010724950.4A CN202010724950A CN111957081A CN 111957081 A CN111957081 A CN 111957081A CN 202010724950 A CN202010724950 A CN 202010724950A CN 111957081 A CN111957081 A CN 111957081A
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- Prior art keywords
- water
- filter
- gas
- main channel
- water distribution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
- B01D24/22—Downward filtration, the filter material being supported by pervious surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4631—Counter-current flushing, e.g. by air
- B01D24/4636—Counter-current flushing, e.g. by air with backwash shoes; with nozzles
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention relates to the technical field of water treatment, in particular to a water distribution system of a filter tank. The filter water distribution system comprises: the filter comprises a filter chamber, a gas-water distribution block, a butterfly tenon, a filter chamber water outlet main channel, a main channel cover plate, a water inlet and outlet gap, an air distribution main rectangular pipe, an air distribution branch pipe, a pebble bearing layer and filter sand; the gas-water distribution block is of a square concrete structure; a filter tank water outlet main channel is arranged in the middle of the rectangular filter tank bottom plate along the longitudinal direction; a main channel cover plate is laid on the top of the filter tank water outlet main channel, and water inlet and outlet gaps are reserved between the main channel cover plates; the air distribution main rectangular pipe is mounted along the bottom of the long-edge tank wall of the filter tank; a plurality of gas distribution branch pipes are uniformly arranged at the lower part of the gas distribution main rectangular pipe; the gas distribution branch pipe penetrates through a lower cavity of the gas-water distribution block; and a plurality of small air outlet holes are uniformly distributed at the bottom of the air distribution branch pipe. The invention can effectively realize backwashing.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a water distribution system of a filter tank.
Background
The water distribution system of the filter tank is a water distribution system which is arranged at the bottom of a filter material layer and is used for uniformly distributing washing water on the plane of the whole filter tank. The water distribution system has the function of enabling backwash water to be uniformly distributed on the plane of the whole filtering device, and meanwhile, filtered water can be uniformly collected during filtering.
At present, water distribution systems often have two basic forms, namely "high-resistance water distribution systems" and "low-resistance water distribution systems". The water distribution uniformity of the water distribution system has great influence on the backwashing effect. If water distribution is not uniform, the sludge cannot be washed cleanly, and the back washing effect is poor.
Disclosure of Invention
Accordingly, the present invention has been made in view of the above problems. The invention provides a water distribution system of a filter tank, which solves the existing problems.
A filter water distribution system comprising: the filter comprises a filter chamber, a gas-water distribution block, a butterfly tenon, a filter chamber water outlet main channel, a main channel cover plate, a water inlet and outlet gap, an air distribution main rectangular pipe, an air distribution branch pipe, a pebble bearing layer and filter sand;
the air-water distribution block is of a square concrete structure, the plastic shell is sleeved outside the air-water distribution block, and a plurality of grooves are formed in the peripheral wall of the air-water distribution block;
the gas-water distribution blocks are connected together through the matching of the butterfly tenon and the groove;
a filter tank water outlet main channel is arranged in the middle of the rectangular filter tank bottom plate along the longitudinal direction; a main channel cover plate is laid on the top of the filter tank water outlet main channel, and water inlet and outlet gaps are reserved between the main channel cover plates;
the air distribution main rectangular pipe is mounted along the bottom of the long-edge tank wall of the filter tank; a plurality of gas distribution branch pipes are uniformly arranged at the lower part of the gas distribution main moment pipe; the gas distribution branch pipe penetrates through a lower cavity of the gas-water distribution block; a plurality of small air outlet holes are uniformly distributed at the bottom of the air distribution branch pipe; the bottom of each row of gas-water distribution blocks at intervals is provided with a gas distribution branch pipe;
the upper part of the gas-water distribution block is paved with a plurality of graded pebble supporting layers from small to large, pebbles with large particle sizes are arranged on the surface of the gas-water distribution block, and pebbles with small particle sizes are covered on the pebble supporting layers and are stacked layer by layer; the filter sand is paved on the pebble bearing layer;
when the filter is used for filtering, raw water enters the filter from the upper part, flows from top to bottom under the action of water level difference and passes through sand filtration, suspended matters in water are intercepted by the sand filtration, clean water enters a pebble supporting layer at the lower part, then passes through a gas-water distribution block and enters a filter outlet main channel from a water inlet and outlet gap between main channel cover plates on the filter outlet main channel.
Preferably, two rows of ventilation and water through holes are distributed on the gas-water distribution block, the diameter of each ventilation and water through hole is 6mm, and the distance between every two rows of relative ventilation and water through holes is 80 mm.
Preferably, the method for processing the ventilation and water through hole comprises the steps of drilling a plurality of holes in the bottom of the plastic shell, inserting reinforcing steel bars into the holes before pouring concrete, enabling the reinforcing steel bars to exceed the top of the air-water distribution block, aligning the reinforcing steel bars with the top of the air-water distribution block, and fixing the reinforcing steel bars after determining the positions. Then concrete is poured and vibrated to be compact. And after the concrete is initially set, pulling out the reinforcing steel bars pre-embedded in the concrete.
The invention has the following beneficial effects:
the invention has even water and gas distribution by back washing, clean sand filtering, reduced mud ball growth and sand filtering hardening in the filter, and prolonged filtering period.
Drawings
FIG. 1 is a view of the gas-water distribution block of the present invention.
FIG. 2 is a connection view of the gas-water distribution block of the present invention.
FIG. 3 is a plan view of the filter of the present invention.
FIG. 4 is a vertical layout of the filter chamber of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those embodiments can be easily implemented by those having ordinary skill in the art to which the present invention pertains. However, the present invention may be embodied in many different forms and is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, components not connected to the present invention will be omitted from the drawings.
A filter water distribution system comprising: the filter comprises a filter chamber, a gas-water distribution block 1, a butterfly tenon 11, a filter chamber water outlet main channel 16, a main channel cover plate 17, a water inlet and outlet gap 18, a gas distribution main rectangular pipe 19, a gas distribution branch pipe 20, a pebble bearing layer 21 and filter sand 22;
as shown in fig. 1, the gas-water distribution block 1 is of a square concrete structure, the exterior of the gas-water distribution block is sleeved with a plastic shell, and the peripheral wall of the gas-water distribution block 1 is provided with a plurality of grooves; the gas-water distribution block 1 plays a role in filtering in a filter tank water distribution system;
as shown in fig. 2, the gas-water distribution blocks 1 are connected together through the matching of the butterfly tenon 11 and the groove;
as shown in fig. 3, a filter tank water outlet main channel 16 is arranged in the middle of the rectangular filter tank bottom plate along the longitudinal direction; a main channel cover plate 17 is laid on the top of the filter tank water outlet main channel 16, and water inlet and outlet gaps 18 are reserved between the main channel cover plates 17;
the air distribution total moment pipe 19 is mounted by being attached to the bottom of the long-side tank wall of the filter tank; a plurality of air distribution branch pipes 20 are uniformly arranged at the lower part of the air distribution main moment pipe 19; the gas distribution branch pipe 20 penetrates through the lower cavity of the gas-water distribution block 1; a plurality of small air outlet holes are uniformly distributed at the bottom of the air distribution branch pipe 20; the bottom of each alternate row of gas-water distribution blocks 1 is provided with a gas distribution branch pipe 20;
as shown in fig. 4, the upper part of the gas-water distribution block 1 is paved with a plurality of graded pebble supporting layers 21 from small to large, pebbles with large particle size are on the surface of the gas-water distribution block 1, and pebbles with small particle size are covered on the pebble supporting layers 21 and are stacked layer by layer; the filter sand 22 is paved on the pebble bearing layer 21;
when the filter is used for filtering, raw water enters the filter from the upper part, flows downwards from top to bottom under the action of water level difference and passes through the filter sand 22, suspended matters in the water are intercepted by the filter sand 22, clean water enters the pebble supporting layer 21 at the lower part, then passes through the air-water distribution block 1 and enters the filter outlet main channel 16 from the water inlet and outlet gap 18 between the main channel cover plates 17 on the filter outlet main channel 16;
the filter chamber backwashing program comprises air washing, air-water backwashing and single-water backwashing, wherein air enters the air distribution branch pipe 20 from the air distribution main rectangular pipe 19 and flows through the flow-limiting air distribution of the bottom hole of the air distribution branch pipe 20, and the backwashing air uniformly enters the bottom of the air-water distribution block 1, flows upwards and enters the pebble supporting layer 21 and the filter sand 22 through the air-water distribution block 1; the disturbance of the air to the filter sand 22 and the shearing force formed by mutual collision and friction of the filter materials peel off the sludge attached to the surface of the filter materials;
when air-water backwashing is carried out, clear water enters the filter sand 22 from a main channel cover plate 17 on a filter tank water outlet main channel 16 through the air-water distribution block 1 and is subjected to air-water flushing, a filter layer can be kept in a fluidized state by certain air-water flushing strength, and sludge falling off in an air-water flushing stage is effectively supported to the surface of the filter sand 22 by matching with lower water flushing strength;
finally, in the single-water backwashing stage, the filter stops air inlet and only keeps backwashing water inlet; the filter layer is in an expanded or micro-expanded state, the high-concentration muddy water above the filter layer is discharged by lower water flushing strength, and meanwhile, the residual falling sludge in the filter layer is further removed, so that the filter layer is thoroughly purified by rinsing;
and after the backwashing of the filter tank is finished, the filter tank is fed with water again and is put into normal filtering operation.
Further, two rows of ventilation and water through holes 12 are arranged on the gas-water distribution block 1, the diameter of each ventilation and water through hole 12 is 6mm, and the distance between each row of relative ventilation and water through holes 12 is 80 mm.
Further, the processing method of the ventilation limber hole 12 comprises the steps of drilling a plurality of holes at the bottom of the plastic shell, inserting reinforcing steel bars into the holes before pouring concrete, wherein the reinforcing steel bars exceed the top of the gas-water distribution block 1 and are fixed after aligning to a determined position; then concrete is poured and vibrated to be compact; and after the concrete is initially set, pulling out the reinforcing steel bars pre-embedded in the concrete.
In the description of the invention, it should be specifically noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" as used herein are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Claims (3)
1. A filter water distribution system comprising: the filter comprises a filter chamber, a gas-water distribution block (1), a butterfly tenon (11), a filter chamber water outlet main channel (16), a main channel cover plate (17), a water inlet and outlet gap (18), a gas distribution main rectangular pipe (19), a gas distribution branch pipe (20), a pebble bearing layer (21) and filter sand (22);
the method is characterized in that: the air-water distribution block (1) is of a square concrete structure, the exterior of the air-water distribution block is sleeved with a plastic shell, and a plurality of grooves are formed in the peripheral wall of the air-water distribution block (1);
the gas-water distribution blocks (1) are connected together through the matching of the butterfly tenon (11) and the groove;
a filter tank water outlet main channel (16) is arranged in the middle of the rectangular filter tank bottom plate along the longitudinal direction; a main channel cover plate (17) is laid on the top of the filter tank water outlet main channel (16), and water inlet and outlet gaps (18) are reserved between the main channel cover plates (17);
the air distribution total moment pipe (19) is mounted along the bottom of the long-edge tank wall of the filter tank; a plurality of air distribution branch pipes (20) are uniformly arranged at the lower part of the air distribution main moment pipe (19); the gas distribution branch pipe (20) penetrates through a lower cavity of the gas-water distribution block (1); a plurality of small air outlet holes are uniformly distributed at the bottom of the air distribution branch pipe (20); the bottom of each row of gas-water distribution blocks (1) at intervals is provided with a gas distribution branch pipe (20);
the upper part of the gas-water distribution block (1) is paved with a plurality of graded pebble supporting layers (21) from small to large, pebbles with large particle sizes are arranged on the surface of the gas-water distribution block (1), and pebbles with small particle sizes are covered on the pebble supporting layers (21) and are stacked layer by layer; the filter sand (22) is paved on the pebble bearing layer (21);
when the filter is used for filtering, raw water enters the filter from the upper part, flows through the sand filter (22) from top to bottom under the action of water level difference, suspended matters in the water are intercepted by the sand filter (22), clear water enters the pebble supporting layer (21) at the lower part, and then enters the filter outlet main channel (16) from a water inlet and outlet gap (18) between the main channel cover plates (17) on the filter outlet main channel (16) through the air-water distribution block (1).
2. A filter water distribution system according to claim 1, wherein: the gas-water distribution block (1) is provided with two rows of ventilation and water through holes (12), the diameter of each ventilation and water through hole (12) is 6mm, and the distance between every two rows of relative ventilation and water through holes (12) is 80 mm.
3. A filter water distribution system according to claim 2, wherein: the processing method of the ventilation limber hole (12) comprises the steps of drilling a plurality of holes at the bottom of the plastic shell, inserting reinforcing steel bars into the holes before pouring concrete, wherein the reinforcing steel bars exceed the top of the gas-water distribution block (1), and are fixed after aligning to a determined position; then concrete is poured and vibrated to be compact; and after the concrete is initially set, pulling out the reinforcing steel bars pre-embedded in the concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010724950.4A CN111957081A (en) | 2020-07-24 | 2020-07-24 | Water distribution system of filter tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010724950.4A CN111957081A (en) | 2020-07-24 | 2020-07-24 | Water distribution system of filter tank |
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| Publication Number | Publication Date |
|---|---|
| CN111957081A true CN111957081A (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010724950.4A Pending CN111957081A (en) | 2020-07-24 | 2020-07-24 | Water distribution system of filter tank |
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| CN (1) | CN111957081A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6306310B1 (en) * | 1996-07-31 | 2001-10-23 | The F. B. Leopold Company, Inc. | Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in filter underdrain flumes |
| CN201239564Y (en) * | 2008-07-18 | 2009-05-20 | 北京创新国平科技有限公司 | Treating device of reverse filtering air water backwashing filter chamber sewage water recycling system |
| CN106277367A (en) * | 2016-10-14 | 2017-01-04 | 浙江德安科技股份有限公司 | A kind of deep bed denitrification bio-filter |
| CN211035434U (en) * | 2019-08-27 | 2020-07-17 | 首创爱华(天津)市政环境工程有限公司 | Deep bed filter for sewage plant |
-
2020
- 2020-07-24 CN CN202010724950.4A patent/CN111957081A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6306310B1 (en) * | 1996-07-31 | 2001-10-23 | The F. B. Leopold Company, Inc. | Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in filter underdrain flumes |
| CN201239564Y (en) * | 2008-07-18 | 2009-05-20 | 北京创新国平科技有限公司 | Treating device of reverse filtering air water backwashing filter chamber sewage water recycling system |
| CN106277367A (en) * | 2016-10-14 | 2017-01-04 | 浙江德安科技股份有限公司 | A kind of deep bed denitrification bio-filter |
| CN211035434U (en) * | 2019-08-27 | 2020-07-17 | 首创爱华(天津)市政环境工程有限公司 | Deep bed filter for sewage plant |
Non-Patent Citations (1)
| Title |
|---|
| 宋业林等: "《水处理设备实用手册》", 31 July 2001, 北京：中国石化出版社 * |
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Application publication date: 20201120 |