CN204310885U - Based on sewage work's pretreatment system that dissolved oxygen controls - Google Patents
Based on sewage work's pretreatment system that dissolved oxygen controls Download PDFInfo
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- CN204310885U CN204310885U CN201420746046.3U CN201420746046U CN204310885U CN 204310885 U CN204310885 U CN 204310885U CN 201420746046 U CN201420746046 U CN 201420746046U CN 204310885 U CN204310885 U CN 204310885U
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- grit chamber
- aerated grit
- lift pump
- canal
- aerated
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- 239000010865 sewage Substances 0.000 title claims abstract description 49
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 17
- 239000001301 oxygen Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000009189 diving Effects 0.000 claims abstract description 16
- 239000002351 wastewater Substances 0.000 claims abstract description 16
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052799 carbon Inorganic materials 0.000 abstract description 10
- 238000006213 oxygenation reaction Methods 0.000 abstract description 10
- 238000013461 design Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 description 10
- 230000005484 gravity Effects 0.000 description 9
- 230000007812 deficiency Effects 0.000 description 4
- 241001589086 Bellapiscis medius Species 0.000 description 3
- 238000005273 aeration Methods 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 230000001877 deodorizing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model relates to a kind of sewage work's pretreatment system controlled based on dissolved oxygen, belongs to technical field of sewage.Mainly comprise wastewater influent canal, inlet pumping station, lift pump outlet canal, aerated grit chamber inlet channel, aerated grit chamber and aerated grit chamber outlet canal, it is characterized in that: below described inlet pumping station, be provided with water collecting basin, water collecting basin is connected with wastewater influent canal, diving lift pump is provided with bottom water collecting basin, diving lift pump connects lift pump outlet conduit, and lift pump outlet conduit connects lift pump outlet canal; Described lift pump outlet canal is connected with aerated grit chamber inlet channel, and aerated grit chamber inlet channel is connected with aerated grit chamber, and aerated grit chamber is connected with aerated grit chamber outlet canal.The utility model mainly solves sewage work's pretreatment unit drop oxygenation problem under traditional engineering design method, has the advantages such as carbon source hold facility is high, intensified denitrification and dephosphorization potentiality large, production run cost is low, energy conservation and consumption reduction effects is remarkable, engineering design method is simple.
Description
Technical field
The utility model relates to a kind of sewage work's pretreatment system controlled based on dissolved oxygen, belongs to technical field of sewage.
Background technology
Water-inlet carbon source deficiency is maximum discharge standard urban wastewater treatment firm stably reaching standard and energy-saving and cost-reducing key constraints.According to statistics, China urban wastewater treatment firm water inlet BOD in 2008
5/ TN average is only 3.49, and the urban wastewater treatment firm water inlet BOD5/TN of 60% is lower than 4.
But under existing traditional engineering design method, the practical problems that during maximum discharge standard sewage treatment plant runs, ubiquity pretreatment unit drop oxygenation causes part water-inlet carbon source directly or indirectly to consume, can aggravate sewage treatment plant inflow carbon source deficiency further.Find according to investigation, during maximum discharge standard sewage treatment plant runs, pretreatment unit drop oxygenation phenomenon is general and its drop oxygenation effect is remarkable, main drop oxygenation point is inlet water lifting pumps water outlet place and aerated grit chamber water outlet place, average drop is highly respectively 1m and 1.5m, and the drop oxygenation effect of actual measurement inlet water lifting pumps water outlet place and aerated grit chamber water outlet place even all can up to the dissolved oxygen increment of 5mg/L.And enter subsequent bio system meeting consumption part water-inlet carbon source or additional carbon fast containing the pretreatment unit water outlet of high density dissolved oxygen, can have a negative impact to the denitrogenation dephosphorizing usefulness of process system undoubtedly, and then affect the stably reaching standard of maximum discharge standard urban wastewater treatment firm and save energy and reduce the cost.
Moreover, all the time, be intensified denitrification and dephosphorization, industry technology personnel are in the treatment plant's engineering design of maximum discharge standard sewage and operational management, usually the technical measures taked at present are mainly for biological processing unit, and basic pretreatment unit of ignoring is to the disadvantageous effect of process system denitrogenation dephosphorizing.
Therefore, based on the stably reaching standard of maximum discharge standard urban wastewater treatment firm and energy-saving and cost-reducing, conventional pretreatment element project method of design must be optimized, control the effect of pretreatment unit drop oxygenation, eliminate the disadvantageous effect of pretreatment unit drop oxygenation effect to water-inlet carbon source and process system denitrogenation dephosphorizing.
Summary of the invention
The purpose of this utility model overcomes the deficiencies in the prior art, a kind of sewage work's pretreatment system controlled based on dissolved oxygen is provided, solves the common problem that the pretreatment unit drop oxygenation effect that exists in current maximum discharge standard urban wastewater treatment firm production run reality causes part water-inlet carbon source directly or indirectly to consume.
According to the technical scheme that the utility model provides, a kind of sewage work's pretreatment system controlled based on dissolved oxygen, comprise wastewater influent canal, inlet pumping station, lift pump outlet canal, aerated grit chamber inlet channel, aerated grit chamber and aerated grit chamber outlet canal, it is characterized in that: below described inlet pumping station, be provided with water collecting basin, water collecting basin is connected with wastewater influent canal, diving lift pump is provided with bottom water collecting basin, diving lift pump connects lift pump outlet conduit, and lift pump outlet conduit connects lift pump outlet canal; Described lift pump outlet canal is connected with aerated grit chamber inlet channel, and aerated grit chamber inlet channel is connected with aerated grit chamber, and aerated grit chamber is connected with aerated grit chamber outlet canal.
Be provided with coarse rack in described wastewater influent canal, the pitch of coarse rack is 20-25mm.
The water-out manners of described diving lift pump is submerge discharging flow.
Be provided with fine fack in described aerated grit chamber inlet channel, the aperture of fine fack is 1-3mm, and the pattern of fine fack is interior influent stream formula, rotary drum or rotary type.
Described aerated grit chamber is connected with aerated grit chamber outlet canal by the aerated grit chamber outlet conduit being arranged on aerated grit chamber end, and the water-out manners of aerated grit chamber is submerge discharging flow.
The utility model has the following advantages and positively effect:
1. by optimizing lift pump water-out manners and aerated grit chamber water-out manners, the deficiency of conventional pretreatment element project method of design can be made up, the practical problems that in the production run of current maximum discharge standard urban wastewater treatment firm, the effect of pretreatment unit drop oxygenation causes part water-inlet carbon source directly or indirectly to consume can be solved;
2. compared with conventional pretreatment system, the utility model has the advantages such as carbon source hold facility is high, intensified denitrification and dephosphorization potentiality large, production run cost is low, energy conservation and consumption reduction effects is remarkable, engineering design method is simple, and the intensified denitrification and dephosphorization that can be maximum discharge standard urban wastewater treatment firm provides new approaches;
3. the utility model combines and produces reality, specific aim and workable, the engineering design that can be China's maximum discharge standard urban wastewater treatment firm provides reference and guidance, has important practical significance with energy-saving and cost-reducing to the stably reaching standard of China's maximum discharge standard urban wastewater treatment firm.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of sewage work described in the utility model pretreatment system.
Embodiment
Below in conjunction with concrete accompanying drawing, the utility model is described in further detail.
As shown in Figure 1: described sewage work's pretreatment system water inlet 1 based on dissolved oxygen control, coarse rack 2, inlet pumping station 3, water collecting basin 4, diving lift pump 5, lift pump outlet conduit 6, lift pump outlet canal 7, aerated grit chamber inlet channel 8, fine fack 9, aerated grit chamber 10, aerated grit chamber outlet conduit 11, aerated grit chamber outlet canal 12, pretreatment unit water outlet 13, wastewater influent canal 14 etc.
As shown in Figure 1, the utility model comprises wastewater influent canal 14, inlet pumping station 3, lift pump outlet canal 7, aerated grit chamber inlet channel 8, aerated grit chamber 10 and aerated grit chamber outlet canal 12; Described inlet pumping station 3 is provided with water collecting basin 4 below, and water collecting basin 4 is connected with wastewater influent canal 14, is provided with diving lift pump 5 bottom water collecting basin 4, and diving lift pump 5 connects lift pump outlet conduit 6, and lift pump outlet conduit 6 connects lift pump outlet canal 7; Described lift pump outlet canal 7 is connected with aerated grit chamber inlet channel 8, and aerated grit chamber inlet channel 8 is connected with aerated grit chamber 10, and aerated grit chamber 10 is connected with aerated grit chamber outlet canal 12;
Be provided with coarse rack 2 in described wastewater influent canal 14, the pitch of coarse rack 2 is 20-25mm;
The water-out manners of described diving lift pump 5 is submerge discharging flow;
Be provided with fine fack 9 in described aerated grit chamber inlet channel 8, the aperture of fine fack 9 is 1-3mm, and the pattern of fine fack 9 is interior influent stream formula, rotary drum or rotary type;
Described aerated grit chamber 10 is connected with aerated grit chamber outlet canal 12 by the aerated grit chamber outlet conduit 11 being arranged on aerated grit chamber 10 end, and the water-out manners of aerated grit chamber 10 is submerge discharging flow;
Described lift pump outlet canal 7 can be built jointly with aerated grit chamber inlet channel 8;
The quantity of described coarse rack 2 is mainly determined according to Designing Sewage Treatment Plant scale;
The type selecting of described diving lift pump 5 and quantity are mainly determined according to the difference of Designing Sewage Treatment Plant scale and water collecting basin 4 minimum liquid level and lift pump outlet canal 7 liquid level;
The type selecting of described fine fack 9 is mainly determined according to sewage treatment process and channel width, and the quantity of fine fack 9 is mainly determined according to the discharge capacity of fine fack 9 and Designing Sewage Treatment Plant scale;
The lattice number that arranges of described aerated grit chamber 10 is mainly determined according to Designing Sewage Treatment Plant scale;
Described wastewater influent canal 14, water collecting basin 4, lift pump outlet canal 7, aerated grit chamber inlet channel 8, aerated grit chamber 10 and aerated grit chamber outlet canal 12 place all take to add a cover closed measure, and arrange biological deodorizing facility and carry out biological deodorizing.
Embodiment one: a kind of sewage work's pretreatment process controlled based on dissolved oxygen, comprises the following steps:
A, after the coarse rack 2 of pitch 25mm removes larger floating matter in wastewater influent canal 14, enter the water collecting basin 4 below inlet pumping station 3 from the sewage treatment plant inflow 1 of urban drainage pipe network;
Sewage in b, water collecting basin 4 enters lift pump outlet canal 7 through lift pump outlet conduit 6 in submerge discharging flow mode under diving lift pump 5 acts on;
Sewage in c, lift pump outlet canal 7 enters the front end of aerated grit chamber inlet channel 8 in the mode of flow by gravity by pipeline, after the fine fack 9 of the aperture 3mm in aerated grit chamber inlet channel 8 removes fine particle thing and twister, gravity flow enters in aerated grit chamber 10;
D, sewage stop 5min in aerated grit chamber 10, under aeration effect to sewage in the fine sand of more than particle diameter 0.2mm remove, the gas-water ratio of aerated grit chamber 10 controls at 0.1-0.2 simultaneously;
E, sewage after aerated grit chamber 10 processes to flow automatically in submerge discharging flow mode through aerated grit chamber outlet conduit 11 at aerated grit chamber 10 end and enter aerated grit chamber outlet canal 12;
Sewage in f, aerated grit chamber outlet canal 12 enters subsequent biological treatment unit as pretreatment unit water outlet 13 gravity flow and processes.
Embodiment two: a kind of sewage work's pretreatment process controlled based on dissolved oxygen, comprises the following steps:
A, after the coarse rack 2 of pitch 20mm removes larger floating matter in wastewater influent canal 14, enter the water collecting basin 4 below inlet pumping station 3 from the sewage treatment plant inflow 1 of urban drainage pipe network;
Sewage in b, water collecting basin 4 enters lift pump outlet canal 7 through lift pump outlet conduit 6 in submerge discharging flow mode under diving lift pump 5 acts on;
Sewage in c, lift pump outlet canal 7 enters the front end of aerated grit chamber inlet channel 8 in the mode of flow by gravity by pipeline, after the fine fack 9 of the aperture 2mm in aerated grit chamber inlet channel 8 removes fine particle thing and twister, gravity flow enters in aerated grit chamber 10;
D, sewage stop 8min in aerated grit chamber 10, under aeration effect to sewage in the fine sand of more than particle diameter 0.2mm remove, the gas-water ratio of aerated grit chamber 10 controls at 0.1-0.2 simultaneously;
E, sewage after aerated grit chamber 10 processes to flow automatically in submerge discharging flow mode through aerated grit chamber outlet conduit 11 at aerated grit chamber 10 end and enter aerated grit chamber outlet canal 12;
Sewage in f, aerated grit chamber outlet canal 12 enters subsequent biological treatment unit as pretreatment unit water outlet 13 gravity flow and processes.
Embodiment three: a kind of sewage work's pretreatment process controlled based on dissolved oxygen, comprises the following steps:
A, after the coarse rack 2 of pitch 20mm removes larger floating matter in wastewater influent canal 14, enter the water collecting basin 4 below inlet pumping station 3 from the sewage treatment plant inflow 1 of urban drainage pipe network;
Sewage in b, water collecting basin 4 enters lift pump outlet canal 7 through lift pump outlet conduit 6 in submerge discharging flow mode under diving lift pump 5 acts on;
Sewage in c, lift pump outlet canal 7 enters the front end of aerated grit chamber inlet channel 8 in the mode of flow by gravity by pipeline, after the fine fack 9 of the aperture 1mm in aerated grit chamber inlet channel 8 removes fine particle thing and twister, gravity flow enters in aerated grit chamber 10;
D, sewage stop 8min in aerated grit chamber 10, under aeration effect to sewage in the fine sand of more than particle diameter 0.2mm remove, the gas-water ratio of aerated grit chamber 10 controls at 0.1-0.2 simultaneously;
E, sewage after aerated grit chamber 10 processes to flow automatically in submerge discharging flow mode through aerated grit chamber outlet conduit 11 at aerated grit chamber 10 end and enter aerated grit chamber outlet canal 12;
Sewage in f, aerated grit chamber outlet canal 12 enters subsequent biological treatment unit as pretreatment unit water outlet 13 gravity flow and processes.
Claims (5)
1. the sewage work's pretreatment system controlled based on dissolved oxygen, comprise wastewater influent canal (14), inlet pumping station (3), lift pump outlet canal (7), aerated grit chamber inlet channel (8), aerated grit chamber (10) and aerated grit chamber outlet canal (12), it is characterized in that: described inlet pumping station (3) is provided with water collecting basin (4) below, water collecting basin (4) is connected with wastewater influent canal (14), water collecting basin (4) bottom is provided with diving lift pump (5), diving lift pump (5) connects lift pump outlet conduit (6), lift pump outlet conduit (6) connects lift pump outlet canal (7), described lift pump outlet canal (7) is connected with aerated grit chamber inlet channel (8), and aerated grit chamber inlet channel (8) is connected with aerated grit chamber (10), and aerated grit chamber (10) is connected with aerated grit chamber outlet canal (12).
2., as claimed in claim 1 based on sewage work's pretreatment system that dissolved oxygen controls, it is characterized in that: be provided with coarse rack (2) in described wastewater influent canal (14), the pitch of coarse rack (2) is 20-25mm.
3., as claimed in claim 1 based on sewage work's pretreatment system that dissolved oxygen controls, it is characterized in that: the water-out manners of described diving lift pump (5) is submerge discharging flow.
4. as claimed in claim 1 based on sewage work's pretreatment system that dissolved oxygen controls, it is characterized in that: in described aerated grit chamber inlet channel (8), be provided with fine fack (9), the aperture of fine fack (9) is 1-3mm, and the pattern of fine fack (9) is interior influent stream formula, rotary drum or rotary type.
5. as claimed in claim 1 based on sewage work's pretreatment system that dissolved oxygen controls, it is characterized in that: described aerated grit chamber (10) is connected with aerated grit chamber outlet canal (12) by the aerated grit chamber outlet conduit (11) being arranged on aerated grit chamber (10) end, the water-out manners of aerated grit chamber (10) is submerge discharging flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420746046.3U CN204310885U (en) | 2014-12-02 | 2014-12-02 | Based on sewage work's pretreatment system that dissolved oxygen controls |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420746046.3U CN204310885U (en) | 2014-12-02 | 2014-12-02 | Based on sewage work's pretreatment system that dissolved oxygen controls |
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| Publication Number | Publication Date |
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| CN204310885U true CN204310885U (en) | 2015-05-06 |
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| CN201420746046.3U Expired - Fee Related CN204310885U (en) | 2014-12-02 | 2014-12-02 | Based on sewage work's pretreatment system that dissolved oxygen controls |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445695A (en) * | 2014-12-02 | 2015-03-25 | 中国市政工程华北设计研究总院有限公司 | Pretreatment system and pretreatment method based on dissolved oxygen control in sewage treatment plant |
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2014
- 2014-12-02 CN CN201420746046.3U patent/CN204310885U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445695A (en) * | 2014-12-02 | 2015-03-25 | 中国市政工程华北设计研究总院有限公司 | Pretreatment system and pretreatment method based on dissolved oxygen control in sewage treatment plant |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150506 |