CN103466819B - Ultrafiltration and powdered activated carbon adsorption combined purification device for removing trace organic matters from drinking water - Google Patents
Ultrafiltration and powdered activated carbon adsorption combined purification device for removing trace organic matters from drinking water Download PDFInfo
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- CN103466819B CN103466819B CN201310383393.4A CN201310383393A CN103466819B CN 103466819 B CN103466819 B CN 103466819B CN 201310383393 A CN201310383393 A CN 201310383393A CN 103466819 B CN103466819 B CN 103466819B
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Abstract
The invention provides an ultrafiltration and powdered activated carbon adsorption combined purification device for removing trace organic matters from drinking water. The combined purification device comprises an activated carbon adsorption reactor (1), an ultrafiltration membrane pool (2), a water pump (3), a reflux pipe (4), a reflux pump (5) and an activated carbon feeding device (6), wherein the activated carbon adsorption reactor (1) is a cellular reactor; a water outlet of the activated carbon adsorption reactor (1) is connected with a water inlet of the ultrafiltration membrane pool (2); an ultrafiltration membrane assembly (7) is arranged in the ultrafiltration membrane pool (2); the water pump (3) is arranged on a water outlet pipe of the ultrafiltration membrane pool (2); one end of the reflux pipe (4) is connected with the ultrafiltration membrane pool (2), and the other end of the reflux pipe (4) is connected with a water inlet pipe of the activated carbon adsorption reactor (1); the reflux pump (5) is arranged on the reflux pipe (4); the activated carbon feeding device (6) is arranged at the top of the ultrafiltration membrane pool (2). The invention further provides a method for removing the trace organic matters from the drinking water by the combined purification device. The combined purification device is simple in process, convenient to use, low in cost, good in purification effect and low in use cost, and basically does not need to be maintained.
Description
Technical field
The invention belongs to water treatment field, particularly a kind of clean method of ultrafiltration-Powdered Activated Carbon adsorption combined of removing trace organic compound on drinking water.
Background technology
The organic contamination particularly pollution of micro-content organism is one of the problem that must face of drinking water source, current China urban, organic pollutant, except the natural organic matters such as humic acid, also comprises endocrine disrupter, persistence organic pollutant (POPs), polycyclic aromatic hydrocarbons, polychlorobiphenyl, algae meta-bolites, medicine and personal care articles (PPCPs) etc.Organic pollutant particularly micro quantity organic pollutant can have a strong impact on the water quality safety of tap water, and therefore how the organic pollutant in economical, efficient, the safe former water of removal is the focus of current drinking water treatment field concern.Manyly at present water factory's actual production by employing, strengthen conventional processing and the modes such as pre-treatment, advanced treatment of setting up are improved organic removal effect, wherein to take ozone-biology, ultrafiltration combination process be two kinds of topmost application forms to advanced treatment.
Ultrafiltration combination process be take ultrafiltration membrance filter as main, and compound preoxidation, charcoal absorption, magnetic ion exchange resin pre-treatment etc. have the technique of better removal effect to organism, and the most conventional with gac.The general employing of combination of ultra-filtration filters and charcoal absorption adds Powdered Activated Carbon in former water, and ultrafiltration is used for precipitating or filtration process carried out final processing afterwards.Although this kind of array configuration can be strengthened organic removal effect to a certain extent, Powdered Activated Carbon is that single is used, and its loading capacity utilization ratio is very low, and what bring thus is that cost of use is higher, and most of water factory is difficult to bear its cost; The appearance of submerged ultrafiltration can utilize the loading capacity of Powdered Activated Carbon greatly, how by adding in membrane cisterna, but whole treating processes is typical admixture completely, lack basic concentration drive ability, cause processing efficiency relatively low, its effect is directly related with Powdered Activated Carbon usage quantity, still can not meet the application requiring of water factory; For the higher feature of part water body ammonia-nitrogen content, ultrafiltration and powdery BAC process be used in combination the removal effect that can improve to a certain extent ammonia nitrogen, but the removal effect of organism especially micro-content organism is difficult to meet the demands, has in addition the risk of microorganism and meta-bolites thereof.Therefore, in the urgent need to a kind of novel ultrafiltration-Powdered Activated Carbon adsorption combined technology form that can effectively remove underwater micro-organic matter, to reach object economic, that remove efficiently underwater micro-organic matter.
Summary of the invention
Goal of the invention: in order to overcome the defect that existing ultrafiltration combination process is relatively poor to underwater micro-organic matter removal effect, processing cost is relatively high, the first object of the present invention is to provide a kind of ultrafiltration-Powdered Activated Carbon adsorption combined refining plant of removing trace organic compound on drinking water, and the second object of the present invention is to provide ultrafiltration-Powdered Activated Carbon adsorption combined purifying method of utilizing aforesaid combination refining plant to remove trace organic compound on drinking water.
Technical scheme: a kind of ultrafiltration-Powdered Activated Carbon adsorption combined refining plant of removing trace organic compound on drinking water provided by the invention, comprises charcoal absorption reactor (1), ultrafiltration membrane cisterna (2), water pump (3), return line (4), reflux pump (5), activated charcoal adding apparatus (6); Described charcoal absorption reactor (1) is cellular reactor, and total number of divisions is more than 2, and its water outlet is connected with the water-in of ultrafiltration membrane cisterna (2); In described ultrafiltration membrane cisterna (2), be provided with hyperfiltration membrane assembly (7); Described water pump (3) is located on the rising pipe of ultrafiltration membrane cisterna (2); Described return line (4) one end is connected with ultrafiltration membrane cisterna (2), the other end is connected with the water inlet pipe of charcoal absorption reactor (1); Described reflux pump (5) is located on return line (4); Described activated charcoal adding apparatus (6) is located at ultrafiltration membrane cisterna (2) top.
As preferably, in each lattice of described charcoal absorption reactor (1), current all adopt upward flow operation scheme, and each lattice is along the size of reactor length direction below 5m, and long-width ratio be (1-2): 1, and the interior available depth of each lattice is more than 3m.
Preferred as another kind, between the adjacent lattice of described charcoal absorption reactor (1), be provided with rectifier tank (8), more than the interior flow velocity of rectifier tank (8) is controlled at 1m/s.
Preferred as another kind, horizontal axial type whipping appts (9), clutch coupling (10) and the drive-motor (11) connecting is successively set in the lattice of described charcoal absorption reactor (1).
Preferred as another kind, each lattice bottom of described charcoal absorption reactor (1) is provided with inclined floor (12), and its gradient is more than 5%.
Preferred as another kind, described ultrafiltration membrane cisterna (2) bottom is provided with aerating apparatus (13), and described aerating apparatus (13) is located at hyperfiltration membrane assembly (7) below; Described aerating apparatus (13) is perforation plate, and its aperture is 2-5mm.
Preferred as another kind, the hyperfiltration membrane assembly (7) in described ultrafiltration membrane cisterna (2) is curtain formula hyperfiltration membrane assembly.
The invention provides a kind of ultrafiltration-Powdered Activated Carbon adsorption combined purifying method of removing trace organic compound on drinking water is also provided, comprise the following steps:
(1) pending water is passed in combination purification device; By activated charcoal adding apparatus, continuously Powdered Activated Carbon is dropped in ultrafiltration membrane cisterna, Powdered Activated Carbon is mixed in ultrafiltration membrane cisterna with pending water; Meanwhile, utilize water pump suction, the water in ultrafiltration membrane cisterna is leached by ultra-filtration membrane; By regulating flooding quantity and aquifer yield, control in ultrafiltration membrane cisterna Powdered Activated Carbon concentration to 200-800mg/L;
(2) utilize reflux pump suction, the water that makes to be mixed with in ultrafiltration membrane cisterna Powdered Activated Carbon is back in charcoal absorption reactor and mixes and carry out absorption reaction with water inlet;
(3) by step (1) and (2), move continuously, to backwashing period, carry out back flushing, simultaneously discharge section gac;
(4) by above-mentioned steps, move continuously, can realize the removal of trace organic compound on drinking water.
In step (1), Powdered Activated Carbon is selected from one or both in ature of coal charcoal and coconut husk charcoal, and its particle diameter is 200-320 order, and Powdered Activated Carbon dosage is the pending water of 1-5mg/L.
In step (1), the ultra-filtration membrane pool inner water power residence time is 15-30min.
In step (1), ultra-filtration membrane membrane flux is controlled at 30L/m
2below h, preferred 10-30L/m
2h.
In step (2), Powdered Activated Carbon reflux ratio is 5-30%.
In step (2), in charcoal absorption reactor, hydraulic detention time is 10-20min.
In step (3), backwashing period is 50-70min.
In step (3), control Powdered Activated Carbon residence time in ultrafiltration membrane cisterna and, in 24h, discharge the gac charcoal amount that gac charcoal amount is step (1) and the interior interpolation of (2) cycle of operation.
Beneficial effect: ultrafiltration-Powdered Activated Carbon adsorption combined refining plant technique provided by the invention is simple, easy to use, with low cost, good purification, basic Maintenance free work, use cost are low.
Combined purification method provided by the invention is held back the absorption of underwater micro-organic matter, ultra-filtration membrane by backflow, the backflow Powdered Activated Carbon of Powdered Activated Carbon in the adding of Powdered Activated Carbon, membrane cisterna, can effectively remove ultrafiltration-Powdered Activated Carbon absorption of trace organic compound on drinking water.
The method improves by concentration of activated carbon increase in membrane cisterna the removal effect that underwater micro-organic matter, is back to charcoal absorption reactor makes full use of the driving effect of starting point concentration to charcoal absorption speed by gac.This combined purification method has that technique is simple, easy to use, with low cost, good purification, basic Maintenance free work, use cost are low.
Specifically, the present invention, with respect to prior art, has following characteristics and advantage:
(1) the present invention is located at ultrafiltration membrane cisterna by Powdered Activated Carbon dog-house, can make the Powdered Activated Carbon of fresh input directly drop in ultrafiltration membrane cisterna, the remarkable removal effect of micro-content organism in strengthening membrane cisterna, the absolute content of guaranteeing underwater micro-organic matter is relatively low, guarantees effluent quality safety; Simultaneously, due to the Powdered Activated Carbon of fresh input is directly dropped in ultrafiltration membrane cisterna, therefore can greatly reduce the dosage of Powdered Activated Carbon, its dosage is between 1-5mg/L, significantly, lower than the usage quantity (10-50mg/L) of general Powdered Activated Carbon, greatly reduce the processing cost of tap water.
(2) in the present invention, be provided with the reflux of Powdered Activated Carbon in ultrafiltration membrane cisterna, thereby the Powdered Activated Carbon in ultrafiltration membrane cisterna is back to Powdered Activated Carbon Reactor inlet; Because Reactor inlet place organic content is relatively high, thereby there is higher concentration drive power, can strengthen removal effect and the degree of micro-content organism; After the Powdered Activated Carbon refluxing mixes with water inlet, because the powder activity carbon content refluxing is higher, more than concentration of activated carbon in reactor can reach 30-50mg/L, can make up Powdered Activated Carbon in charcoal absorption reactor for the problem of using, adsorptive power is poor, also can reach the effect of higher removal organic pollutant.
(3) the present invention is by discharge and the ultra-filtration membrane back flushing of waste-powder gac, control the residence time of Powdered Activated Carbon in membrane cisterna in 24h, thereby avoid growing of microorganism on activated carbon granule, avoid the formation of biological powder activated carbon, thereby guaranteed the removal effect of micro-content organism;
(4) Powdered Activated Carbon grain diameter is preferably 200-320 order, and removal effect that both can effective guarantee micro-content organism can alleviate again the pollution of Powdered Activated Carbon particle to ultra-filtration membrane simultaneously.
(5) the present invention can strengthen the Adsorption effect of micro-content organism by the adsorptive reactor of cellular is set.
(6) the present invention by arranging horizontal axial type whipping appts (9), clutch coupling (10) and the drive-motor (11) connecting successively in the lattice of charcoal absorption reactor (1), generally rely on the effect of increasing of current to make whipping appts rotation, mutual collision between current, Powdered Activated Carbon and the blade of whipping appts simultaneously, the contact probability of greatly strengthening Powdered Activated Carbon particle and underwater micro-organic matter, improves removal effect; Meanwhile, can also reduce the power consumption of whipping appts.
(7) the present invention arranges rectifier tank and can change the direction of a stream of water, and can further strengthen the degree of scatter of Powdered Activated Carbon in water because flow velocity in rectifier tank is higher simultaneously, further improves organic removal effect.
(8) charcoal absorption reactor bottom arranges certain gradient, can effectively avoid Powdered Activated Carbon particle to deposit at reactor bottom, promotes the adsorption efficiency of gac.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention removes ultrafiltration-Powdered Activated Carbon adsorption combined refining plant of trace organic compound on drinking water.
Fig. 2 is ultrafiltration-Powdered Activated Carbon adsorption combined purifying method schema that the present invention removes trace organic compound on drinking water.
Embodiment
Below in conjunction with accompanying drawing, the present invention is made and being further illustrated.
Remove ultrafiltration-Powdered Activated Carbon adsorption combined refining plant of trace organic compound on drinking water, see Fig. 1, comprise charcoal absorption reactor 1, ultrafiltration membrane cisterna 2, water pump 3, return line 4, reflux pump 5, activated charcoal adding apparatus 6.
Charcoal absorption reactor 1 is cellular reactor, and its water outlet is connected with the water-in of ultrafiltration membrane cisterna 2; In the present invention, the total number of divisions of charcoal absorption reactor 1 is 3, and in each lattice, current all adopt upward flow operation scheme, and each lattice is of a size of 5m along reactor length direction, and long-width ratio is 2:1, and in each lattice, available depth is at 3m; Alternatively, its parameter also can rationally arrange as required, preferably, the total number of divisions of charcoal absorption reactor 1 is more than 2, and each lattice is along the size of reactor length direction below 5m, and long-width ratio is 1-2:1, in each lattice, available depth, more than 3m, all can reach good effect.Between the adjacent lattice of charcoal absorption reactor 1, be provided with rectifier tank 8; Horizontal axial type whipping appts 9, clutch coupling 10 and the drive-motor 11 connecting is successively set in the lattice of charcoal absorption reactor 1.Each lattice bottom of charcoal absorption reactor 1 is provided with inclined floor 12, and its gradient is 5%, and alternatively, its gradient also can more than 5% selected arbitrarily.
In ultrafiltration membrane cisterna 2, be provided with hyperfiltration membrane assembly 7, hyperfiltration membrane assembly 7 is curtain formula hyperfiltration membrane assembly; Water pump 3 is located on the rising pipe of ultrafiltration membrane cisterna 2; Ultrafiltration membrane cisterna 2 tops are provided with activated charcoal adding apparatus 6; Ultrafiltration membrane cisterna 2 bottoms are provided with aerating apparatus 13, and aerating apparatus 13 is located at hyperfiltration membrane assembly 7 belows; Aerating apparatus 13 is perforation plate, and its aperture is 2-5mm.On ultrafiltration membrane cisterna 2, be also connected with backwash tube 7, backwash pump 8 is located on backwash tube 7.
Return line 4 one end are connected with ultrafiltration membrane cisterna 2, the other end is connected with the water inlet pipe of charcoal absorption reactor 1; Reflux pump 5 is located on return line 4.
For the validity of the related method of checking invention, for the Changjiang river source water, after coagulation, precipitation process, to add G-30027 and be mixed with aforesaid method pending water used, its Central Plains water G-30027 concentration is 100 μ g/L.
Utilize aforesaid combination refining plant to remove trace organic compound on drinking water, comprise the following steps:
(1) pending water is passed in combination purification device; By activated charcoal adding apparatus 6, continuously Powdered Activated Carbon is dropped in ultrafiltration membrane cisterna 2, Powdered Activated Carbon and pending water are mixed ultrafiltration membrane cisterna 2 is interior; Meanwhile, utilize water pump 3 suctions, the water in ultrafiltration membrane cisterna is leached by hyperfiltration membrane assembly 7; By regulating flooding quantity and aquifer yield, control ultrafiltration membrane cisterna 2 interior Powdered Activated Carbon concentration to 200-800mg/L;
(2) utilize reflux pump 5 suction, the water that makes to be mixed with in ultrafiltration membrane cisterna 2 Powdered Activated Carbon is back in charcoal absorption reactor 1 and mixes and carry out absorption reaction with water inlet; More than the interior flow velocity of rectifier tank 8 is controlled at 1m/s;
(3) by step (1) and (2), move continuously, to backwashing period 50-70min, carry out back flushing, while discharge section gac, control Powdered Activated Carbon is in the interior residence time of ultrafiltration membrane cisterna 2 in 24h, and discharging gac charcoal amount is the gac charcoal amount of adding in step (1) and (2) cycle of operation;
(4) by above-mentioned steps, move continuously, can realize the removal of trace organic compound on drinking water.
Carry out four parallel laboratory tests, result is as follows simultaneously:
Experiment 1: processing parameter: Powdered Activated Carbon is particle diameter 200 object ature of coal charcoals, and dosage is the pending water of 5mg/L; The ultra-filtration membrane pool inner water power residence time is controlled at 30min, and Powdered Activated Carbon concentration is controlled at 200mg/L, and ultra-filtration membrane flux is controlled at 30L/m
2below h; Powdered Activated Carbon reflux ratio is 30%; In charcoal absorption reactor, hydraulic detention time is controlled at 20min.Result: steady running 2 months, in water outlet, G-30027 concentration stabilize is at 1.5-2.0 μ g/L.
Experiment 2: processing parameter: Powdered Activated Carbon is particle diameter 200 object coconut husk charcoals, and dosage is the pending water of 3mg/L; The ultra-filtration membrane pool inner water power residence time is controlled at 30min, and Powdered Activated Carbon concentration is controlled at 500mg/L, and ultra-filtration membrane flux is controlled at 30L/m
2below h; Powdered Activated Carbon reflux ratio is 10%; In charcoal absorption reactor, hydraulic detention time is controlled at 20min.Result: steady running 2 months, in water outlet, G-30027 concentration stabilize is at 1.5-1.8 μ g/L.
Experiment 3: processing parameter: Powdered Activated Carbon is the mixture of particle diameter 320 object coconut husk charcoals and 320 object ature of coal charcoals, and dosage is the pending water of 3mg/L; The ultra-filtration membrane pool inner water power residence time is controlled at 30min, and Powdered Activated Carbon concentration is controlled at 800mg/L, and ultra-filtration membrane flux is controlled at 30L/m
2below h; Powdered Activated Carbon reflux ratio is 5%; In charcoal absorption reactor, hydraulic detention time is controlled at 20min.Result: steady running 2 months, in water outlet, G-30027 concentration stabilize is at 1.5-1.6 μ g/L.
Experiment 4: processing parameter: Powdered Activated Carbon is particle diameter 320 object coconut husk charcoals, and dosage is the pending water of 1mg/L; The ultra-filtration membrane pool inner water power residence time is controlled at 15min, and Powdered Activated Carbon concentration is controlled at 400mg/L, and ultra-filtration membrane flux is controlled at 10L/m
2h; Powdered Activated Carbon reflux ratio is 20%; In charcoal absorption reactor, hydraulic detention time is controlled at 10min.Result: steady running 2 months, in water outlet, G-30027 concentration stabilize is at 1.5-1.7 μ g/L.
Claims (3)
1. ultrafiltration-Powdered Activated Carbon adsorption combined refining plant of removing trace organic compound on drinking water, is characterized in that: comprise charcoal absorption reactor (1), ultrafiltration membrane cisterna (2), water pump (3), return line (4), reflux pump (5), activated charcoal adding apparatus (6); Described charcoal absorption reactor (1) is cellular reactor, and total number of divisions is more than 2, and its water outlet is connected with the water-in of ultrafiltration membrane cisterna (2); In described ultrafiltration membrane cisterna (2), be provided with hyperfiltration membrane assembly (7); Described water pump (3) is located on the rising pipe of ultrafiltration membrane cisterna (2); Described return line (4) one end is connected with ultrafiltration membrane cisterna (2), the other end is connected with the water inlet pipe of charcoal absorption reactor (1); Described reflux pump (5) is located on return line (4); Described activated charcoal adding apparatus (6) is located at ultrafiltration membrane cisterna (2) top; Current all adopt upward flow operation scheme in each lattice of described charcoal absorption reactor (1), and each lattice is along the size of reactor length direction below 5m, and long-width ratio be (1-2): 1, and the interior available depth of each lattice is more than 3m; Between the adjacent lattice of described charcoal absorption reactor (1), be provided with rectifier tank (8), more than the interior flow velocity of rectifier tank (8) is controlled at 1m/s; Horizontal axial type whipping appts (9), clutch coupling (10) and the drive-motor (11) connecting is successively set in the lattice of described charcoal absorption reactor (1); Each lattice bottom of described charcoal absorption reactor (1) is provided with inclined floor (12), and its gradient is more than 5%.
2. a kind of ultrafiltration-Powdered Activated Carbon adsorption combined refining plant of removing trace organic compound on drinking water according to claim 1, it is characterized in that: described ultrafiltration membrane cisterna (2) bottom is provided with aerating apparatus (13), described aerating apparatus (13) is located at hyperfiltration membrane assembly (7) below; Described aerating apparatus (13) is perforation plate, and its aperture is 2-5mm.
3. a kind of ultrafiltration-Powdered Activated Carbon adsorption combined refining plant of removing trace organic compound on drinking water according to claim 1, is characterized in that: the hyperfiltration membrane assembly (7) in described ultrafiltration membrane cisterna (2) is curtain formula hyperfiltration membrane assembly.
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| CN103979701B (en) * | 2014-06-05 | 2015-07-15 | 张筱秋 | Zinc alloy internal thread reef seawater desalination device |
| CN104445691A (en) * | 2014-11-28 | 2015-03-25 | 北京赛诺水务科技有限公司 | Circulating powdered activated carbon and ultrafiltration combined water treatment system and application thereof |
| CN108455788A (en) * | 2018-02-08 | 2018-08-28 | 苏州膜海分离技术有限公司 | A kind of technique of biological powder activated carbon-ultra-filtration and separation for micro-polluted drinking water |
| CN113503533B (en) * | 2021-07-30 | 2022-07-22 | 赣州市怡辰宏焰能源科技有限公司 | Rotary grate type biomass gasification furnace |
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| CN101798157A (en) * | 2010-03-09 | 2010-08-11 | 上海交通大学 | Combined purification method of drinking water |
| CN103214117A (en) * | 2013-04-01 | 2013-07-24 | 北京工业大学 | Powdered activated carbon reflux/ultrafiltration combined technology for water treatment plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101798157A (en) * | 2010-03-09 | 2010-08-11 | 上海交通大学 | Combined purification method of drinking water |
| CN103214117A (en) * | 2013-04-01 | 2013-07-24 | 北京工业大学 | Powdered activated carbon reflux/ultrafiltration combined technology for water treatment plant |
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