CN201999844U - Activated sludge floatation thickening device adopting film biological reaction tank technology - Google Patents
Activated sludge floatation thickening device adopting film biological reaction tank technology Download PDFInfo
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- CN201999844U CN201999844U CN2011200179422U CN201120017942U CN201999844U CN 201999844 U CN201999844 U CN 201999844U CN 2011200179422 U CN2011200179422 U CN 2011200179422U CN 201120017942 U CN201120017942 U CN 201120017942U CN 201999844 U CN201999844 U CN 201999844U
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- flotation pool
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Abstract
The utility model relates to an activated sludge floatation thickening device adopting a film biological reaction tank technology. The device comprises a flocculation reaction tank, a stirrer arranged in the tank, a sludge inlet, a chemical feed device, a floatation tank, a dissolved gas releasing area and a flotation area both separated by a half-isolated weir in the tank, a sludge discharge groove and a sludge scraper, a sludge collecting pipeline arranged at the bottom of the device, a water storage tank connected to the back of the floatation tank, a liquid level regulator arranged in the tank, and a quick gas dissolving device. The device provided by the utility model is applied to thickening treatment to activated sludge by adopting the film biological reaction tank technology, and has the advantages of simple structure, reasonable design, simplicity and convenience in operation, and good effect.
Description
Technical field
The utility model belongs to a kind of sewage disposal technology, specifically be a kind of concentration method that is used for the residual active sludge that biological wastewater treatment process produces, especially for the efficient air-floating concentrating unit and the concentration method of the residual active sludge that produces in the sewage treatment process of membrane biological reaction pond.
Background technology
At present, the membrane biological reaction pond is a kind of novel water technology of being tied platform by film separation unit and biological processing unit mutually, replace second pond with membrane module and in bio-reactor, keep the high reactivity sludge concentration, take up an area of to reduce sewage treatment facility, and by keeping low sludge loading to reduce sludge quantity.Specifically, utilize the membrane separation plant be immersed in the biological tank to hold back active sludge and macromole solids, realization mud-water separation exactly in the pond in.Under the situation that the membrane module manufacturing technology improves constantly, this treatment technology will be ripe more, and have application prospect widely.Accordingly, the residual active sludge treatment technology of this technology generation need be reformed equally.The spissated method of sludge produced by sewage treatment has a variety of, as: gravity concentrates, air supporting concentrates, machinery concentrates etc., and wherein air supporting concentration technique is a kind of typical technology.Its method is to feed a large amount of micro-bubbles in water, and the solid particulate in microbubble and the water is adhered to, and formation density is less than the band gas flco of water, under buoyancy function, floats to the water surface and finishes solid-liquid separation.This method is used for the history that ore dressing has year surplus in the of 100, is used for the history that water treatment has year surplus in the of 80, is used for the history that mud concentrates then year surplus in the of 50.The difference of pressure of living in can be divided into when air supporting was separated out by microbubble: pressurized dissolved air flotation, normal pressure air supporting and vacuum air supporting.Wherein pressurized dissolved air flotation is best suited for mud and concentrates, and it is low to have provinces of occupation of land, the fast efficient height of processing speed, mud extraction water ratio, is more suitable in the concentration of the active sludge of membrane biological reaction pool process generation.But the dissolved air flotation that is using in the world at present still has some shortcoming and defect, is summarized as follows: (1) flow process complexity, and equipment is many, and operating point is many, and workload is big between limber up period, and operation highly depends on automatic control; (2) draining suspension object height, water quality inferiority does not reach (GB18918-2002) the one-level B standard of middle regulation of China's " urban wastewater treatment firm pollutant emission standard "; (3) the medicine consumption is big, and is of a great variety, the medicament expense height; (4) air flotation pool liquid level and the chain robot control system(RCS) failure rate of draining motorized valve height, instability; And discover that compare with traditional active sludge, the activated sludge particles that membrane biological reactor process produces is more tiny, proportion and water are near, the organic content height, be difficult to sedimentation and be easy to the come-up, bigger with common concentration technology intractability, be a difficult problem of generally acknowledging in the industry.Therefore, need improve, a kind of spissated dissolved air flotation concentrating unit of membrane biological reaction pool process excess sludge and concentration method of being specially adapted to need be provided existing dissolved air flotation mud concentration technique.
The utility model content
The purpose of this utility model is in order to solve the problems of the technologies described above, a kind of active sludge air supporting concentrating unit and method of membrane biological reaction pool process are proposed, these apparatus and method not only have the advantage that occupation of land economizes, processing speed is fast, efficient is high, the mud extraction water ratio is low, and can reduce the degree of dependence to automatic control; Improve draining water quality, reach emission standard; Reduce medicament and use kind and consumption, reduce medicament expense and use; Reduce the mud extracellular polymeric, increase dewatering performance of sludge.
The purpose of this utility model is to realize by following technical scheme:
The active sludge air supporting concentrating unit of membrane biological reaction pool process, also be called the integration air-float concentration basin, it is characterized in that: be provided with flocculation tank, be provided with agitator in this reaction tank, pond body front end is provided with mud inlet and is communicated with the excess sludge relief outlet in the membrane biological reaction pond of sewage disposal device, this mud inlet is provided with to the doser that adds flocculation agent in the mud, the rear portion of this reaction tank is provided with air flotation pool, the rear portion of air flotation pool is a flotation area, the front portion is that molten gas discharges the district, flotation area and molten gas discharge and are provided with half between the district every the weir, and flocculation tank discharges the district with molten gas and is connected, and is provided with between the two for the flocculation mud gravity after the flocculation reaction and flows into the overflow weir that molten gas discharges the district; The air flotation pool back connects tank, is provided with every the weir between air flotation pool and the tank, and the top of air flotation pool is provided with mud drainage slot, and the air flotation pool top is provided with scrapes mud scraper into mud drainage slot with the air supporting mud above the air flotation pool; The bottom of air flotation pool is provided with the sludge pipe road of sediment discharging; Above described tank, be provided with the regulator of level that overflows to tank for the flotation area clear liquid, this regulator of level upper end is provided with control hand wheel and regulates sleeve pipe, this is opening above sleeve pipe, following face seal slidably with the vertical tube socket, the vertical tube lower end is provided with porous and concentrates the perforated pipe level of catchmenting of clear liquid to stretch into the flotation area bottom of described air flotation pool, described regulator of level can be regulated the water level of tank and flotation area, to guarantee the works better of air flotation pool top mud-scraping machine, the rear wall of tank is provided with the water port of getting rid of clear liquid; Be provided with quick air-dissolving apparatus, the conduit entrance of this device is communicated with tank, and outlet discharges the district with described molten gas and is communicated with, and the pipeline of air-dissolving apparatus is provided with air pump fast, the pipeline of this air pump front is provided with the inlet mouth of the air filter of filtrated air, and the back pipeline is provided with molten gas stabilizer.
The advantage of sludge concentration device of the present utility model:
(1) flow process is simple, and equipment is few, and operating point is few, and automatic control relies on low, more stable
Facts have proved, adopt quick air-dissolving apparatus to replace air compressor machine, molten gas filling, reflux pump and its robot control system(RCS); Adopt liquid level regulation device to replace traditional liquid level and the chain robot control system(RCS) of draining motorized valve, significantly reduce device category and quantity, simplify flow process, cancelled and having cost an arm and a leg, act frequently and the import motorized valve that takes place frequently of fault, operating point further reduces, and system is more stable.
(2) the draining turbidity is low, and water quality is good, reaches sewage work " one-level B " emission standard
Facts have proved that by adjusting dosage and gas-solid ratio, the draining turbidity can be controlled at below the 10NTU, even below the 5NTU, COD
CrBelow 60mg/L, SS is below 10mg/L, and draining water quality is good.
(3) medicament is single, and consumption is saved
Facts have proved that only add a kind of cationic polyacrylamide and can reach treatment effect, the dried solid of mud per ton adds 0.5～1 kilogram of medicine and gets final product.This kind medicament is convenient to buying on market, low price, and the throwing amount is few, has saved a large amount of working costs.Through measuring and calculating, the total dosage of new technology thickening is 4～5 ‰, compares with the water factory total medicament expense of present situation thickening, can save 44% or 120 yuan.
(4) concentrated effect is good, and water extracter efficient improves
Facts have proved that the membrane bioreactor active sludge concentrates through this square law device, water ratio can reduce to 92%～96%.The more important thing is that concentrate through air supporting, active sludge character changes, and is easier to dehydration.By the belt machine dehydration, moisture content of the cake can reduce to 77% to Floatation Thickening Sludge again, and moisture content of the cake is lower.A large amount of follow-up disposal costs has been saved in the minimizing of mud cake amount, and benefit is very considerable.
Description of drawings
Fig. 1 is that concentrating unit of the present utility model is an integration air-float concentration basin plan structure synoptic diagram;
Fig. 2 is that concentrating unit of the present utility model is an integration air-float concentration basin forward sight sectional structure synoptic diagram;
Fig. 3 is the structural representation of local A among Fig. 2.
The profile of the utility model device is not subjected to the restriction of this figure, and only the profile change also belongs to protection domain of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further: embodiment: referring to accompanying drawing: this city sewage work was transformed into domestic largest membrane biological reaction pool process municipal wastewater treatment plant at present in 2008.Yet, concentrate+processing of belt dehydrating integrated machine by existing mud concentration technology of factory and cylinder, the moisture content of the cake of excess sludge can only be controlled at 82%～88%, can't be reduced to below 80%, the cost that has increased the mud transportation and disposed becomes urgent problem.
The utility model is implemented in this factory, the air supporting concentrating unit that is provided with the active sludge of membrane biological reaction pool process is the integration air-float concentration basin, referring to accompanying drawing: be provided with flocculation tank 1, be provided with agitator 2 in this reaction tank, pond body front end is provided with mud inlet 11 and is communicated with the excess sludge relief outlet in the membrane biological reaction pond of sewage disposal device, this mud inlet is provided with to the doser 12 that adds flocculation agent in the mud, the rear portion of this reaction tank is provided with air flotation pool, the rear portion of air flotation pool is a flotation area 4, the front portion is that molten gas discharges district 3, flotation area and molten gas discharge and are provided with half between the district every weir 31, flocculation tank discharges the district with molten gas and is connected, and is provided with between the two for the flocculation mud gravity after the flocculation reaction and flows into the overflow weir 11 that molten gas discharges the district; The air flotation pool back connects tank 7, and air flotation pool and tank are provided with every weir 71, and the top of air flotation pool is provided with mud drainage slot 9, is provided with above the air flotation pool air supporting mud above the air flotation pool is scraped mud scraper 10 into mud drainage slot; The bottom of air flotation pool is provided with the sludge pipe road 11 of sediment discharging; Above described tank, be provided with the regulator of level 8 that overflows to tank for the flotation area clear liquid, this regulator of level upper end is provided with control hand wheel 81 and adjusting screw(rod) and sleeve pipe 82, this is opening above sleeve pipe, following face seal slidably with vertical tube 83 sockets, the vertical tube lower end is provided with porous and concentrates perforated pipe 6 levels of catchmenting of clear liquid to stretch into the flotation area bottom of described air flotation pool, and the rear wall of tank is provided with the water port 72 of getting rid of clear liquid; Be provided with quick air-dissolving apparatus in addition, the conduit entrance of this device is communicated with tank, and outlet discharges the district with described molten gas and is communicated with, and the pipeline of air-dissolving apparatus is provided with air pump 52 fast, the pipeline of this air pump front is provided with the inlet mouth 53 of band strainer, and the back pipeline is provided with molten gas stabilizer 51.
The water ratio 98.8%～99.2% of mud is reduced to 90%～92%, and the belt water extracter filter-press dehydration effect by mud is reduced to below 80% moisture content of the cake.Compare with the sludge concentration method of routine, effect has fairly obvious raising.
Claims (1)
1. the active sludge air supporting concentrating unit of a membrane biological reaction pool process, also be the integration air-float concentration basin, it is characterized in that: be provided with flocculation tank (1), be provided with agitator (2) in this reaction tank, pond body front end is provided with mud inlet (11) and is communicated with the excess sludge relief outlet in the membrane biological reaction pond of sewage disposal device, this mud inlet is provided with to the doser (12) that adds flocculation agent in the mud, the rear portion of this reaction tank is provided with air flotation pool, the rear portion of air flotation pool is flotation area (4), the front portion is that molten gas discharges district (3), flotation area and molten gas discharge and are provided with half between the district every weir (31), flocculation tank discharges the district with molten gas and is connected, and is provided with between the two for the flocculation mud gravity after the flocculation reaction and flows into the overflow weir (11) that molten gas discharges the district; The air flotation pool back connects tank (7), and air flotation pool and tank are provided with every weir (71), and the top of air flotation pool is provided with mud drainage slot (9), is provided with above the air flotation pool air supporting mud above the air flotation pool is scraped mud scraper (10) into mud drainage slot; The bottom of air flotation pool is provided with the sludge pipe road (11) of sediment discharging; Above described tank, be provided with the regulator of level (8) that overflows to tank for the flotation area clear liquid, this regulator of level upper end is provided with control hand wheel (81) and adjusting screw(rod) and sleeve pipe (82), this is opening above sleeve pipe, following face seal slidably with vertical tube 83 sockets, the vertical tube lower end is provided with porous and concentrates the perforated pipe that catchments (6) level of clear liquid to stretch into the flotation area bottom of described air flotation pool, and the rear wall of tank is provided with the water port (72) of getting rid of clear liquid; Be provided with quick air-dissolving apparatus in addition, the conduit entrance of this device is communicated with tank, outlet discharges the district with described molten gas and is communicated with, the pipeline of air-dissolving apparatus is provided with air pump (52) fast, the pipeline of this air pump front is provided with the inlet mouth (53) of band strainer, and the back pipeline is provided with molten gas stabilizer (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200179422U CN201999844U (en) | 2011-01-20 | 2011-01-20 | Activated sludge floatation thickening device adopting film biological reaction tank technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200179422U CN201999844U (en) | 2011-01-20 | 2011-01-20 | Activated sludge floatation thickening device adopting film biological reaction tank technology |
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| Publication Number | Publication Date |
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| CN201999844U true CN201999844U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200179422U Expired - Lifetime CN201999844U (en) | 2011-01-20 | 2011-01-20 | Activated sludge floatation thickening device adopting film biological reaction tank technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126822A (en) * | 2011-01-20 | 2011-07-20 | 北京城市排水集团有限责任公司 | Active sludge floatation thickening device and method for membrane biological reaction tank process |
| CN102424510A (en) * | 2011-10-21 | 2012-04-25 | 无锡海拓环保装备科技有限公司 | Sludge concentration air-floatation device |
| CN106698884A (en) * | 2015-08-12 | 2017-05-24 | 王树岩 | Radial-flow type sludge air flotation thickening device |
| CN106698713A (en) * | 2015-11-18 | 2017-05-24 | 湖北金汉江精制棉有限公司 | Solid-liquid separating system in sewage treatment |
-
2011
- 2011-01-20 CN CN2011200179422U patent/CN201999844U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126822A (en) * | 2011-01-20 | 2011-07-20 | 北京城市排水集团有限责任公司 | Active sludge floatation thickening device and method for membrane biological reaction tank process |
| CN102126822B (en) * | 2011-01-20 | 2012-05-23 | 北京城市排水集团有限责任公司 | Active sludge floatation thickening device and method for membrane biological reaction tank process |
| CN102424510A (en) * | 2011-10-21 | 2012-04-25 | 无锡海拓环保装备科技有限公司 | Sludge concentration air-floatation device |
| CN106698884A (en) * | 2015-08-12 | 2017-05-24 | 王树岩 | Radial-flow type sludge air flotation thickening device |
| CN106698713A (en) * | 2015-11-18 | 2017-05-24 | 湖北金汉江精制棉有限公司 | Solid-liquid separating system in sewage treatment |
| CN106698713B (en) * | 2015-11-18 | 2019-07-30 | 湖北金汉江精制棉有限公司 | Solid-liquid separation system in sewage treatment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111005 Effective date of abandoning: 20120509 |