CN205151816U - A fixed bed of packings aeration blows system of taking off for desorption groundwater carbon tetrachloride - Google Patents
A fixed bed of packings aeration blows system of taking off for desorption groundwater carbon tetrachloride Download PDFInfo
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- CN205151816U CN205151816U CN201520794116.7U CN201520794116U CN205151816U CN 205151816 U CN205151816 U CN 205151816U CN 201520794116 U CN201520794116 U CN 201520794116U CN 205151816 U CN205151816 U CN 205151816U
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Abstract
The utility model discloses a fixed bed of packings aeration blows system of taking off for desorption groundwater carbon tetrachloride, blowing including the aeration and taking off pond, fixed bed of packings and aeration systems, the aeration blows to take off to be arranged the multilayer in the pond and fix the bed of packings, and the bottom sets up aeration systems, and aeration systems adoption micropore aeration dish is connected through air inlet and outside air supply, the aeration blows and takes off the pond top and set up mechanical exhaust system and exhaust gas collection device, and its lateral wall upper and lower parts do not is equipped with water inlet and delivery port, fixed bed of packings adopts the reduction material of load iron granule to pack. The utility model discloses removal effects to carbon tetrachloride can improve 20%, and the construction running cost is low, and quality of water accords with national standard.
Description
Technical field
What the utility model related to a kind of underground water source water supply plant Carbon Tetrachloride Contamination thing removes system and method, particularly efficient, the low consumption of underground water source water supply plant, the fixed bed padding aeration stripping tetracol phenixin treatment process of no coupling product, belong to Water purification technical field.
Background technology
Underground water accounts for 22.6% of global Freshwater resources total amount, and the people in the whole world 1/4 take underground water as drinking water source.There are 400 city exploiting groundwaters in China, and the feed rate of underground water has accounted for 20% of national total supply, more becomes main drinking water source at vast rural groundwater.
69 urban groundwater organic contaminations of 31 provinces in the whole nation detect and show, the component that in organic pollutant, recall rate is higher is mainly hydrochloric ether, detect frequency higher be tetracol phenixin, chloroform etc.Tetracol phenixin is quite stable in underground water, is difficult to decompose, and is typical hepatotoxic agent, during high density, is first affect central nervous system, affects liver, kidney subsequently; Lower concentration Long Term Contact then main manifestations, to the infringement of liver, kidney, is classified as among 129 kinds " in water priority pollutants Black Lists " and 68 kinds, China " in water priority pollutants Black List " by the U.S..
The method that in domestic and international underground water, Carbon Tetrachloride Contamination is administered mainly comprises showering technology and based technique for in-situ remediation: showering refers to and polluted water is collected into earth's surface by extraction system, and then take measures to process, mainly comprise passive collection and pump-and-treat system; In-situ immobilization does not then transport pollutent, but repairs under its envrionment conditions had, and mainly comprises permeability response grid, aeration process, chemical oxidation techniques, bioremediation technology, electric repairing technique etc.
Consider Financial cost and water supply security, the technical measures that water supply plant can adopt are active carbon adsorption technology, Biological Pretreatment Techniques and aeration stripping technology: 1) active carbon adsorption technology---gac is a kind of good water conditioner, activated carbon filter can be set up in water factory, tetracol phenixin in Adsorption water, but charcoal absorption is easily saturated, need periodic replacement, Financial cost is high; 2) Biological Pretreatment Techniques---biochemical treatment mainly utilizes the metabolism of microorganism to tetracol phenixin of degrading, the general required time of biochemical reaction is longer, because underground water Middle nutrition material is less, microorganism cannot obtain abundant nutrition, can not amount reproduction, good removal effect cannot be reached; 3) aeration stripping technology---aeration stripping is owned by France in physical method, can set up aeration stripping pond in water factory is utilize the difference between the actual concentrations of dissolved compound in water and equilibrium concentration, by volatile constituent constantly by Liquid Phase Diffusion in gas phase, reach and remove the object of volatile organic matter.
Comprehensive Correlation can find out that aeration stripping technology has certain advantage compared with other treatment processs, is the form mainly adopting stripping tower, but there is structure costly, and running cost is high, and secondary pollution problem, is mainly used in sewage treatment area.Therefore, existing aeration stripping technological treatment, processing parameter are not suitable for underground water source water supply plant, and underground water source water supply plant lacks the removing process method of the tetracol phenixin of simple and effective.
Summary of the invention
Technical problem to be solved in the utility model is the defect existed for prior art, a kind of removing process method of underground water source water supply plant Carbon Tetrachloride Contamination thing is provided, tetracol phenixin in effective elimination water body, ensures that effluent quality meets country " drinking water sanitary standard " (GB5749-2006).
For solving this technical problem, the utility model provides a kind of fixing bed of packings aeration stripping system for removing underground water tetracol phenixin, comprise aeration stripping pond, fixing bed of packings and aerating system, in described aeration stripping pond, arranging multiplayer fixes bed of packings, bottom it, aerating system is set, aerating system adopts microporous aeration disc, is connected with external air source by inlet mouth; Top, described aeration stripping pond arranges mechanical dust removal and tail gas collecting device, and its side wall upper part and bottom are respectively equipped with water-in and water outlet; Described fixing bed of packings adopts the reducing substance filler of load iron particle.
Described aeration stripping pond adopts formula structure of prancing, and divide three grades, current upper entering and lower leaving, submersion depth is not less than 3m.
3-4 layer established by described fixing bed of packings, every layer thickness 200mm-300mm; Described fixing bed of packings adopts the spherical suspending filling material of load iron particle, filler diameter 100mm, proportion 0.92-0.95g/cm3, tamped density 50%-80%.
Described aerating system divides three grades, and every grade all can be measured separately and control, and adopt microporous aeration disc, under water 0.5m-1m, the bubble diameter of generation is 1mm ~ 3mm; The exit end of described aerating system arranges purging valve, and every lattice inlet pipe arranges gas meter, arranges gas distribution pipeline bottom aeration stripping pond in rich font.
Described mechanical dust removal adopts axial-flow exhaust fan, and be arranged on the air outlet on top, aeration stripping pond, body top, aeration stripping pond also arranges air pressure monitoring device, links with mechanical dust removal.
Described exhaust gas processing device is arranged on the top of mechanical dust removal, and adopt coal mass active carbon, grain diameter >=5mm, Penetrating curve >=70%, packing height is 800-1000mm.
The end of aerating system is provided with chlorine disinfectant point.
Beneficial effect: the utility model adopts the filler of load iron particle, can by difficult for part volatile organic contaminant, be reduced to volatile organic matter, compare simple aerating system, fixing bed of packings aeration stripping system can improve 20% to the removal effect of tetracol phenixin, thus improves its removal efficiency, and more conventional stripping tower construction and running cost obviously reduce, easily realize through engineering approaches application, aerating system current consumption and air demand obviously reduce; Can not only tetracol phenixin in effective elimination water body, and the tetracol phenixin discharged after effectively solving aeration stripping is to the pollution of environment, the Carbon Tetrachloride Contamination problem of different concns in water body can be tackled, ensure that effluent quality meets country " drinking water sanitary standard " (GB5749-2006).
Accompanying drawing explanation
Fig. 1 is the structural representation in the utility model aeration stripping pond.
In figure: 1 aeration stripping pond, 2 fixing bed of packings, 3 aerating systems, 4 water-ins, 5 water outlets, 6 inlet pipe, 7 mechanical dust removals.
Embodiment
Below in conjunction with drawings and Examples, the utility model is specifically described.
Figure 1 shows that the structural representation in the utility model aeration stripping pond.
The utility model comprises aeration stripping pond 1, fixing bed of packings 2 and aerating system 3, and in described aeration stripping pond 1, arranging multiplayer fixes bed of packings 2, arranges aerating system 3 bottom it, and aerating system 3 adopts microporous aeration disc, is connected with external air source by inlet mouth 6; Top, described aeration stripping pond 1 arranges mechanical dust removal 7 and tail gas collecting device, and its side wall upper part and bottom are respectively equipped with water-in 4 and water outlet 5; Described fixing bed of packings 2 adopts the reducing substance filler of load iron particle.
Described aeration stripping pond 1 adopts formula structure of prancing, and divide three grades, current upper entering and lower leaving, hydraulic detention time is 10min-30min, and submersion depth is not less than 3m.
3-4 layer established by described fixing bed of packings 2, every layer thickness 200mm-300mm; Described fixing bed of packings 2 adopts spherical suspending filling material, the reducing substance such as load iron particle on filler, filler diameter 100mm, proportion 0.92-0.95g/cm3, tamped density 50%-80%.
Described aerating system 3 points three grades, every grade all can be measured separately and control, and according to the evolution with distance of pond internal contamination substrate concentration, regulates gas-water ratio and aeration ratio.
Described aerating system 3 adopts microporous aeration disc, 0.5m-1m under water, and the bubble diameter of generation is 1mm ~ 3mm.
The exit end of described aerating system 3 arranges purging valve, and every lattice inlet pipe arranges gas meter, is used for regulating gas-water ratio, arranges gas distribution pipeline bottom aeration stripping pond 1 in rich font.
Described mechanical dust removal 7 adopts axial-flow exhaust fan, is arranged on the air outlet on top, aeration stripping pond 1, and body top, aeration stripping pond 1 also arranges air pressure monitoring device, links with mechanical dust removal 7, accelerates the effusion speed of carbon tetrachloride gas in clean water basin.
Described exhaust gas processing device is arranged on the top of mechanical dust removal 7, adopts coal mass active carbon, grain diameter >=5mm, Penetrating curve >=70%, packing height is 800-1000mm, for adsorbing the carbon tetrachloride gas of overflowing from water, prevents the pollution to surrounding environment.
The end of aerating system 3 is provided with chlorine disinfectant point, reduces aeration to the impact of sterilisation effect.
The fixing layering filler of bed of packings 2 and micro-aeration of microporous aeration disc are the keys that the utility model removes tetracol phenixin effect quality, the mode that filler adopts multilayer to arrange, former water fully contacts with bubble in packing area, this kind of arrangement form is adopted to decrease the Duan Liu district of filler, add the contact probability of water, gas, film, multi-level continuous cutting is carried out to the air pocket of aeration plate release, thus reduction bubble diameter, increase the contact area of bubble and tetracol phenixin, improve the removal effect of tetracol phenixin, and energy-saving effect is good.
Utilize this fixing bed of packings aeration stripping system to remove underground water tetracol phenixin, specifically comprise the steps:
1) contaminated tetracol phenixin former water current upper entering and lower leaving, enters aeration stripping pond 1 from top water-in 4, and hydraulic detention time is 10min-30min, and submersion depth is not less than 3m;
2) according to the evolution with distance of aeration stripping pond 1 internal contamination substrate concentration, gas-water ratio and aeration intensity is regulated;
3) according to gas-water ratio and aeration intensity determination aeration rate;
4) microbubble that bottom aerating system 3 produces contacts with polluted water is reverse, in aeration stripping pond 1, the bubble assembled in uphill process is cut microbubble by fixed bed 2 filler of layered arrangement again, and polluted water is evenly distributed, by tetracol phenixin stripping out;
5) tetracol phenixin overflowed is processed by the mechanical dust removal 7 of aeration stripping Chi1Ding and tail gas collecting device;
6) water outlet 5 of treated water bottom the body of aeration stripping pond 1 flows out, and enters the rear water outlet of clean water basin sterilization.
Described step 2) described gas-water ratio and aeration intensity determined by pollutent starting point concentration, when tetracol phenixin clearance is 50%, 80% and 90%, required gas-water ratio is respectively 1,2 and 3, and aeration intensity is 6-8L/ (m2h).
Described aeration rate is determined according to gas-water ratio and aeration intensity, regulates gas-water ratio by purging valve and the gas meter be located in inlet pipe.
Embodiment of the present utility model
The former hydromining underground water of certain water factory, design scale 50,000 m3/d, present technical process is deep-well pump house+clean water basin+suction well+booster pump chamber, wherein clean water basin two, the volume of single seat clean water basin is 4000m3, clean water basin planar dimension is 36m × 36m, and available depth is 3.2m, and sterilization adopts disinfection by chlorine dioxide.Find in water quality monitoring (WQM) in recent years, tetracol phenixin exceeds standard comparatively serious, and concentration, at 2 μ g/L-10 μ g/L, therefore needs to carry out technological transformation to it, is specifically implemented as follows.
(1) one, newly-built air blast machine room, planar dimension 10.8 × 7.8m, adopt two Root's blowers as source of the gas, parameter is: Q=37.5m3/min, P=39.2kpa, N=37Kw, the exit end of gas blower arranges purging valve, inlet pipe arranges gas meter, be used for regulating gas-water ratio, gas-water ratio adjustable extent is 2:1-5:1, at the bottom of aeration tank, install boring aeration pipe, boring aeration pipe adopts annular configuration, the main caliber DN350 of aerating system, flow velocity is 12m/s, branch diameter DN50, tubing is stainless steel tube, and flow velocity is 5m/s.The Ball-type packing that layout three layers is novel above aerating system, every layer height 30cm, tamped density 60%.6 aerofoil fans are set above the body of pond, power 0.37KW, air quantity 3000m
3/ h, the activated carbon adsorption layer of 1000mm above aerofoil fan.
(2) under this operational conditions, investigate through the engineering practice of a year, result shows, whole system normal operation, effluent quality is good, in water outlet, Carbon Tetrachloride Concentration is lower than detection limit, and unit water producing cost increases by 0.07 yuan/m3, and other indexs all meet " drinking water sanitary standard " (GB5749-2006).
The utility model adopts the filler of load iron particle, can by difficult for part volatile organic contaminant, be reduced to volatile organic matter, compare simple aerating system, fixing bed of packings aeration stripping system can improve 20% to the removal effect of tetracol phenixin, thus improves its removal efficiency, and more conventional stripping tower construction and running cost obviously reduce, easily realize through engineering approaches application, aerating system current consumption and air demand obviously reduce; Can not only tetracol phenixin in effective elimination water body, and the tetracol phenixin discharged after effectively solving aeration stripping is to the pollution of environment, the Carbon Tetrachloride Contamination problem of different concns in water body can be tackled, ensure that effluent quality meets country " drinking water sanitary standard " (GB5749-2006).
The above-mentioned embodiment of the utility model, just illustrates, is not only, and all changes within the scope of the utility model or in equivalent scope of the present utility model are all surrounded by the utility model.
Claims (7)
1. one kind for removing the fixing bed of packings aeration stripping system of underground water tetracol phenixin, it is characterized in that: comprise aeration stripping pond (1), fixing bed of packings (2) and aerating system (3), the interior arranging multiplayer of described aeration stripping pond (1) fixes bed of packings (2), aerating system (3) is set bottom it, aerating system (3) adopts microporous aeration disc, is connected with external air source by inlet mouth (6); Described aeration stripping pond (1) top arranges mechanical dust removal (7) and tail gas collecting device, and its side wall upper part and bottom are respectively equipped with water-in (4) and water outlet (5); Described fixing bed of packings (2) adopts the reducing substance filler of load iron particle.
2. the fixing bed of packings aeration stripping system for removing underground water tetracol phenixin according to claim 1, is characterized in that: the employing of described aeration stripping pond (1) is pranced formula structure, points three grades, and current upper entering and lower leaving, submersion depth is not less than 3m.
3. the fixing bed of packings aeration stripping system for removing underground water tetracol phenixin according to claim 1, is characterized in that: described fixing bed of packings (2) establishes 3-4 layer, every layer thickness 200mm-300mm; Described fixing bed of packings (2) adopts the spherical suspending filling material of load iron particle, filler diameter 100mm, proportion 0.92-0.95g/cm
3, tamped density 50%-80%.
4. the fixing bed of packings aeration stripping system for removing underground water tetracol phenixin according to claim 1, it is characterized in that: described aerating system (3) divides three grades, every grade all can be measured separately and control, adopt microporous aeration disc, 0.5m-1m under water, the bubble diameter of generation is 1mm ~ 3mm; The exit end of described aerating system (3) arranges purging valve, and every lattice inlet pipe arranges gas meter, and gas distribution pipeline is arranged in rich font in aeration stripping pond (1) bottom.
5. the fixing bed of packings aeration stripping system for removing underground water tetracol phenixin according to claim 1, it is characterized in that: described mechanical dust removal (7) adopts axial-flow exhaust fan, be arranged on the air outlet on aeration stripping pond (1) top, aeration stripping pond (1) body top also arranges air pressure monitoring device, links with mechanical dust removal (7).
6. the fixing bed of packings aeration stripping system for removing underground water tetracol phenixin according to claim 1, it is characterized in that: on the top of mechanical dust removal (7), exhaust gas processing device is installed, described exhaust gas processing device adopts coal mass active carbon, grain diameter >=5mm, Penetrating curve >=70%, packing height is 800-1000mm.
7. the fixing bed of packings aeration stripping system for removing underground water tetracol phenixin according to any one of claim 1-6, is characterized in that: the end of aerating system (3) is provided with chlorine disinfectant point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520794116.7U CN205151816U (en) | 2015-10-14 | 2015-10-14 | A fixed bed of packings aeration blows system of taking off for desorption groundwater carbon tetrachloride |
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| CN201520794116.7U CN205151816U (en) | 2015-10-14 | 2015-10-14 | A fixed bed of packings aeration blows system of taking off for desorption groundwater carbon tetrachloride |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152256A (en) * | 2015-10-14 | 2015-12-16 | 山东省城市供排水水质监测中心 | Fixed filler bed aeration stripping system used for removing groundwater carbon tetrachloride and method for removing groundwater carbon tetrachloride by using fixed filler bed aeration stripping system |
| CN105967358A (en) * | 2016-06-08 | 2016-09-28 | 水利部交通运输部国家能源局南京水利科学研究院 | Waste liquid and gas collecting device of small underground water seepage physical model |
-
2015
- 2015-10-14 CN CN201520794116.7U patent/CN205151816U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152256A (en) * | 2015-10-14 | 2015-12-16 | 山东省城市供排水水质监测中心 | Fixed filler bed aeration stripping system used for removing groundwater carbon tetrachloride and method for removing groundwater carbon tetrachloride by using fixed filler bed aeration stripping system |
| CN105967358A (en) * | 2016-06-08 | 2016-09-28 | 水利部交通运输部国家能源局南京水利科学研究院 | Waste liquid and gas collecting device of small underground water seepage physical model |
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