CN1562772A - Ventilation and reaeration system with no power for treating land of sewage - Google Patents
Ventilation and reaeration system with no power for treating land of sewage Download PDFInfo
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- CN1562772A CN1562772A CNA2004100175445A CN200410017544A CN1562772A CN 1562772 A CN1562772 A CN 1562772A CN A2004100175445 A CNA2004100175445 A CN A2004100175445A CN 200410017544 A CN200410017544 A CN 200410017544A CN 1562772 A CN1562772 A CN 1562772A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/33—Wastewater or sewage treatment systems using renewable energies using wind energy
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Abstract
The method is install a perforated gas pipe in soil infiltration layer between water distributing pipe and water collecting pipe installed at ground with sewage, to cover high polymer hydrophobic poromeric film on outside surface of the perforated gas pipe to form a gas pipe which gas can escape but water cant, air pipe connected to ends of the gas pipe is connected with pumping fan on the earth's surface and direct interliked to air. 'Gas-liquid-gas-solid' mass transfer way is changed to 'gas-solid' by this invention to increase mass transfer efficiency and oxide effect from air to soil.
Description
Technical field
The present invention relates to a kind of unpowered ventilation reoxygenation system that is used for that polluted water land handles, utilize natural wind energy that the air in the treatment system ventpipe is realized automatic replacement cycles, and the high molecular hydrophobic air-permeable envelope that utilizes perforation ventpipe outside surface to coat, improve mass-transfer efficiency and the reoxygenation effect of air to soil.Belong to the environmental engineering technical field of sewage.
Technical background
Along with China's rapid economy development, the water eutrophication form that large watershed pollution of area source such as the Taihu Lake basin of China, basin, Three Gorges, basin, Bohai Rim cause is increasingly serious, progressively become the social concern that influences Economic development, caused the great attention of country.The plan of " 95 ", " 15 " country " 863 " all drops into the anti-system technology of pollution of area source that the substantial contribution exploitation is fit to China's national situation.And soil treatment technology (subsurface infiltration technology, quick diafiltration technology, slow rate technology, artificial swamp or the like) is owing to can effectively remove BOD (biochemical aerobic amount), COD (chemical aerobic amount), has good denitrogenation dephosphorizing ability again, reach the advanced treatment of wastewater effect, and cost is low, operational management is simple, has broad prospect of application also progressively to be applied.
But the main drawback that the soil treatment technology faces is: along with the operation of treatment system, sewage treating efficiency reduces gradually after the several years, and system easily takes place to stop up and the absorption saturated phenomenon.The major cause that causes above problem is the oxygen supply deficiency of soil filtration layer, causes removing active reduction of nitrobacteria of the activity and the nitration reaction of organic aerobic microbiological, and nitrated rate is not high, NH
4 +-N is to NO
3 --N transformation efficiency descends, and causes biological denitrificaion efficient to reduce.
The mode of supplying gas that the traditional wastewater soil is handled has two kinds: the one, and the continuous or perforate tracheae bubbling air of gap in treatment system with electric air pump; The 2nd, the perforate ventpipe in the treatment system is linked to each other with atmosphere by row's mouth, the power air-supply arrangement is not installed.Forced air supply mode with air pump has strengthened blast intensity, but consumed power improves investment and running cost, and the inconvenience management is unfavorable for handling dispersed face source sewage.
The mode of more than supplying gas all is that direct ventpipe with perforate is embedded in the filter layer of treatment system, the direct mulching soil in the top of pipe or other diafiltration materials, and tiny soil (diafiltration material) granule is easy to stop up the perforate on the ventpipe; Simultaneously, because water can be by in the perforation inflow pipe of pipe, tapping at ventpipe forms liquid film (moisture film) easily, air in the pipe must penetrate liquid film, airborne oxygen will be converted into the dissolved oxygen of free state, mass transfer mode through " solid gas-liquid-gas-" could arrive the soil particle surface, could supply soil particle surface microorganism degradation of organic substances, realization reoxygenation purpose.Consequently, have only the soil particle surface microorganism that directly contacts with the liquid film of tapping can effectively utilize the oxygen supply of ventpipe, the soil particle of direct contact water film can only not absorb the oxygen that diffuses out from moisture film; And from moisture film the mass-transfer efficiency of " Gu liquid-gas-" mass transfer process of diffusion of oxygen well below air directly to the mass-transfer efficiency of " Gu gas-" process of soil particle.Therefore, the reoxygenation effect of Sewage treatment systems is low, has influenced the growth of aerobic microbiological and the generation of nitration reaction, causes NH
4 +-N decreasing ratio is low.
At the problem of soil processing reoxygenation difficulty, publication number is that the Chinese patent of CN2286176Y is provided with the perforate ventpipe in the both sides with the same level of water distributor, carries air by breather, can to a certain degree improve the reoxygenation state of soil.But because ventpipe is the both sides that are placed on the same level of water distributor, and water distribution ventpipe standoff distance is greater than 800mm.Its defective should have two: one, and this induction pipe is in water distribution layer, can not make the effective reoxygenation of diffusion filtering layer below the water distributor; The 2nd, this perforate ventpipe is air gravity flow ventilation, and the efficient of displaced air is relatively low.
Comprehensive above ventilating mode has following deficiency:
1, need the supply gas soil treatment technology of reoxygenation mode of electric air pump forced ventilation to have two shortcomings, the firstth, the essential transmission system that increases increases the initial cost of sewage disposal; The secondth, increase the operation electricity expense and use.Soil treatment technology range of application is restricted;
2, the transfer of air efficient of ventpipe is not high.Because water can be gone into from the orifice flow on pipe top, go out from the orifice flow of pipe bottom, the mass transfer mode that easily internal surface or the outside surface at pipe forms moisture film, and the air in the pipe must penetrate liquid film and could contact with soil, this " Gu gas-liquid-gas-" has reduced the mass-transfer efficiency of gas.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, the unpowered ventilation reoxygenation system that provides that a kind of polluted water land handles solves the problem of the reoxygenation difficulty of polluted water land treating processes soil filtration layer, utilizes natural wind energy simultaneously, need not power and carries air.
For realizing such purpose, arrange the perforation ventpipe that is coated with the hydrophobicity air-permeable envelope in the soil filtration layer of the present invention between polluted water land treatment unit water distributor, header, perforation ventpipe one end links to each other with the wind energy exhaust fan that is placed in the face of land by airway, and the other end connects the airway that communicates with atmosphere.Be provided with rainproof layer at the top of exhaust fan and the airway ground surface end that directly communicates, enter ventpipe to prevent surface water and rainwater with atmosphere.
The percentage of open area of perforation ventpipe of the present invention is 20-80%, its appearance coated high molecular hydrophobicity air-permeable envelope, and the ventpipe of formation permeable watertight, being embedded in needs in the soil filtration of the reoxygenation layer, and installation direction is parallel with water distributor.
When the air on the face of land has wind flow, no matter wind direction how, the flabellum of exhaust fan can both rotation, replaced with the air in the airway that exhaust fan is connected and to be extracted out a part, cause airway to produce certain negative pressure, because the airway that links to each other with the ventpipe the other end directly is communicated with atmosphere, so the air outside the system can be sucked automatically and enters airway, arrival is embedded in the ventpipe in the soil filtration layer, realizes strengthening the ventilation reoxygenation.
Perforation ventpipe outside surface of the present invention is coated with the high molecular hydrophobic air-permeable envelope, permeable watertight, making the outer water of ventpipe can not see through perforate enters in the pipe, and the air in the perforation ventpipe can pass molecule hydrophobicity air-permeable envelope, directly realizes the reoxygenation purpose with granule contacting of soil or other diafiltration materials.
Innovation part of the present invention has two: one, and the gas of treatment system is extracted out automatically by an exhaust fan that is driven by wind energy, and consumed power not need not power-driven pump and gives system's air feed, can the consolidation system natural ventilation, and easy construction, management is simple; The 2nd, at the outside surface coated high molecular hydrophobicity air-permeable envelope of perforation ventpipe, a ventpipe permeable watertight, make the air in the ventpipe can be delivered in the soil filtration layer by the perforate of pipe, and the sewage of soil filtration layer can not flow in the ventpipe, mass transfer mode that will " Gu gas-liquid-gas-" is changed into " Gu gas-" mass transfer mode, has improved mass-transfer efficiency and the reoxygenation effect of air to soil.
Description of drawings
Fig. 1 forms structural representation for system of the present invention.
Among the figure, exhaust fan 1, airway 2, perforation ventpipe 3, hydrophobicity air-permeable envelope 4, water distributor 5, soil filtration layer 6, header 7.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is further described.
Unpowered ventilation reoxygenation of the present invention system is mainly by two portions component assembly, and its sectional structure is arranged as shown in Figure 1.A part is the perforation ventpipe 3 of coated high molecular hydrophobicity air-permeable envelope 4 in the Sewage treatment systems; Another part is an exhaust fan 1 that is installed in the land treatment system face of land; In addition, the airway 2 that connects perforation ventpipe 3 and exhaust fan 1 is arranged.The present invention is applied to contain in the device that the polluted water land of water distributor 5, soil filtration layer 6, header 7 handles.
Concrete structure of the present invention is: arrange the perforation ventpipe 3 that is coated with hydrophobicity air-permeable envelope 4 in the soil filtration layer 6 between polluted water land treatment unit water distributor 5, header 7, perforation ventpipe 3 one ends link to each other with the wind energy exhaust fan 1 that is placed in the face of land by airway 2, and the other end of perforation ventpipe 3 connects the airway 2 that communicates with atmosphere.
Principle of work of the present invention:
1, unpowered draught principle: the present invention makes exhaust fan 1 rotation extract portion of air out from airway 2 by wind energy, causes producing negative pressure in the airway 2, realizes the automatic ventilation reoxygenation of Sewage treatment systems.When the air on the face of land had wind flow, no matter wind direction how, the flabellum of exhaust fan 1 can both rotation, was replaced with the air in the airway that exhaust fan 1 is connected and extracted out a part ofly, caused airway to produce certain negative pressure.Because the airway that links to each other with ventpipe 3 the other ends directly is communicated with atmosphere, therefore when the flabellum time rotational of exhaust fan 1, the air outside the system can be sucked automatically and enter airway, arrives the ventpipe 3 that is embedded in the soil filtration layer, realizes strengthening ventilation reoxygenation purpose.And wind-force is big more, and the flabellum rotating speed is fast more, and the negative pressure that produces in the ventpipe is big more, and displaced air is fast more, and the speed air flow in the Sewage treatment systems Center Vent tube is accelerated, and the reoxygenation effect is good more.
2, strengthen the reoxygenation principle: realize by improving the air mass-transfer efficiency.After the air of perforation in the ventpipe 3 passes molecule hydrophobicity air-permeable envelope 4, can be directly realize the reoxygenation purpose with granule contacting of soil or other diafiltration materials.Mechanism is as follows: the hole of perforation ventpipe 3 is coated by hydrophobicity air-permeable envelope 4, the liquid-solid contact angle that water forms on the surface of hydrophobicity air-permeable envelope 4 is greater than 90 °, water exists with the spherical globule rather than liquid film form, therefore, has the free access of air in perforation place of pipe.Perforation ventpipe 3 outside surfaces of the present invention are coated with high molecular hydrophobic air-permeable envelope 4, and permeable watertight makes the outer water of ventpipe can not see through perforate and enter in the pipe, the mass transfer mode of " Gu gas-liquid-gas-" of air is changed into " Gu gas-" the mass transfer mode.Because the aerial spread coefficient of oxygen is: 0.178cm
2/ s (0 ℃, 101.325kPa), and the spread coefficient of oxygen in water is 1.80 * 10
-9Cm
2/ s (20 ℃ of dilute solutions), therefore, the present invention's " Gu gas-" mass transfer mode is compared " Gu gas-liquid-gas-" mass transfer mode, has greatly improved mass-transfer efficiency and the reoxygenation effect of oxygen to soil.
In one embodiment of the invention, the water distributor of Sewage treatment systems is about 200mm from the face of land, and header is embedded in about 1000mm apart from the face of land, and the reoxygenation ventpipe is embedded in the filter layer between water distributor and the header, about 500mm apart from the face of land.With the redox potential of oxidation reduction potential determination instrument measurement ventpipe top about 300mm filter layer apart from the face of land, the result is about 450～500mv.
Claims (1)
1, the unpowered ventilation reoxygenation system that a kind of polluted water land is handled, it is characterized in that at polluted water land treatment unit water distributor (5), arrange perforation ventpipe (3) in the soil filtration layer (6) between the header (7), its installation direction is parallel with water distributor (5), it is 20-80% that perforation ventpipe (3) is gone up percentage of open area, perforation ventpipe (3) appearance coated high molecular hydrophobicity air-permeable envelope (4), form the ventpipe of permeable watertight, the two ends of perforation ventpipe (3) connect airway (2) respectively, the airway of one end (2) links to each other with the exhaust fan that is placed in the face of land (1), the airway of the other end (2) directly communicates with atmosphere, is provided with rainproof layer at the top of exhaust fan (1) and airway (2) ground surface end that directly communicates with atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100175445A CN1242926C (en) | 2004-04-08 | 2004-04-08 | Ventilation and reaeration system with no power for treating land of sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100175445A CN1242926C (en) | 2004-04-08 | 2004-04-08 | Ventilation and reaeration system with no power for treating land of sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1562772A true CN1562772A (en) | 2005-01-12 |
| CN1242926C CN1242926C (en) | 2006-02-22 |
Family
ID=34479029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100175445A Expired - Fee Related CN1242926C (en) | 2004-04-08 | 2004-04-08 | Ventilation and reaeration system with no power for treating land of sewage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1242926C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870519A (en) * | 2010-05-06 | 2010-10-27 | 同济大学 | Nitrogen and phosphorus removal bio-trickling filter by artificially strengthening natural ventilation |
| CN101891309A (en) * | 2010-07-22 | 2010-11-24 | 河北联合大学 | Method for transferring mass between gas and liquid by utilizing medium |
| CN101913697A (en) * | 2010-06-28 | 2010-12-15 | 西安工业大学 | Natural reoxygenation biomembrane reaction device and water body in-situ remediation method thereof |
| CN102276115A (en) * | 2011-07-09 | 2011-12-14 | 桂林理工大学 | Land strengthening treatment device for domestic wastewater |
| CN102539277A (en) * | 2011-12-30 | 2012-07-04 | 张振华 | Monitoring system and measuring method based on transient air conduction principle for moisture content of soil profile |
| CN102565304A (en) * | 2011-12-30 | 2012-07-11 | 张振华 | Dynamic in-situ monitoring system and measuring method for soil profile moisture |
| CN105129973A (en) * | 2015-08-24 | 2015-12-09 | 大连爱特流体控制有限公司 | Unpowered autonomous aeration biomembrane assembly |
| CN108545828A (en) * | 2018-04-17 | 2018-09-18 | 温州大学苍南研究院 | A kind of waste water soil treatment system reoxygenation device |
| CN110894463A (en) * | 2019-12-20 | 2020-03-20 | 深圳泰利能源有限公司 | Flat plate type photobioreactor for microalgae culture |
| CN113735272A (en) * | 2021-09-13 | 2021-12-03 | 河北工业大学 | Natural ventilation type subsurface flow constructed wetland device and operation method thereof |
-
2004
- 2004-04-08 CN CNB2004100175445A patent/CN1242926C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870519B (en) * | 2010-05-06 | 2012-07-25 | 同济大学 | Nitrogen and phosphorus removal bio-trickling filter by artificially strengthening natural ventilation |
| CN101870519A (en) * | 2010-05-06 | 2010-10-27 | 同济大学 | Nitrogen and phosphorus removal bio-trickling filter by artificially strengthening natural ventilation |
| CN101913697A (en) * | 2010-06-28 | 2010-12-15 | 西安工业大学 | Natural reoxygenation biomembrane reaction device and water body in-situ remediation method thereof |
| CN101891309A (en) * | 2010-07-22 | 2010-11-24 | 河北联合大学 | Method for transferring mass between gas and liquid by utilizing medium |
| CN102276115A (en) * | 2011-07-09 | 2011-12-14 | 桂林理工大学 | Land strengthening treatment device for domestic wastewater |
| CN102565304A (en) * | 2011-12-30 | 2012-07-11 | 张振华 | Dynamic in-situ monitoring system and measuring method for soil profile moisture |
| CN102539277A (en) * | 2011-12-30 | 2012-07-04 | 张振华 | Monitoring system and measuring method based on transient air conduction principle for moisture content of soil profile |
| CN102539277B (en) * | 2011-12-30 | 2014-04-09 | 鲁东大学 | Monitoring system and measuring method based on transient air conduction principle for moisture content of soil profile |
| CN102565304B (en) * | 2011-12-30 | 2014-10-08 | 鲁东大学 | Dynamic in-situ monitoring system and measuring method for soil profile moisture |
| CN105129973A (en) * | 2015-08-24 | 2015-12-09 | 大连爱特流体控制有限公司 | Unpowered autonomous aeration biomembrane assembly |
| CN108545828A (en) * | 2018-04-17 | 2018-09-18 | 温州大学苍南研究院 | A kind of waste water soil treatment system reoxygenation device |
| CN110894463A (en) * | 2019-12-20 | 2020-03-20 | 深圳泰利能源有限公司 | Flat plate type photobioreactor for microalgae culture |
| CN113735272A (en) * | 2021-09-13 | 2021-12-03 | 河北工业大学 | Natural ventilation type subsurface flow constructed wetland device and operation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1242926C (en) | 2006-02-22 |
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Granted publication date: 20060222 |