CN102583698A - Oxidation-adsorption integral arsenic removal device and method for drinking water - Google Patents
Oxidation-adsorption integral arsenic removal device and method for drinking water Download PDFInfo
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- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims abstract description 90
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- 239000004575 stone Substances 0.000 claims description 9
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses an oxidation-adsorption integral arsenic removal device and method for drinking water, which belong to the field of deep arsenic removal of the drinking water. The device comprises a water inlet control system, a reactor, an ultrafiltration membrane filtration system, an aeration oxidation system, a sludge discharge system and a water outlet control system, wherein the ultrafiltration membrane filtration system is arranged on the middle lower part of the reactor and is connected with the water outlet control system; the sludge discharge system comprises a sludge discharge valve and a sludge discharge pipe; the aeration oxidation system comprises an aeration pipe, an air inlet valve and an air pump; and the water outlet control system is formed by sequentially connecting a water outlet valve, a sucking pump and a water outlet pipe, and is connected with the ultrafiltration membrane filtration system. According to the oxidation-adsorption integral arsenic removal device and method for drinking water, oxidation, adsorption and membrane separation are organically combined to be completed in a same reaction pool, and the advantages that: the engineering application is convenient, the fixed investment is low, the operation cost is low, and deep arsenic removal with the safety of water quality of the drinking water can be ensured, are realized.
Description
Technical field
The present invention relates to drinking water deep arsenic removal field, more particularly, relate to a kind of oxidation absorption integral drinking water arsenic removing apparatus and method that adopts ultra-filtration membrane.
Background technology
The water body arsenic contamination is a global problem.Based on geochemistry and sudden water pollution accident, China's population of receiving the tap water arsenic contamination accounts for 30% of the world according to statistics.In view of the significant damage of arsenic to HUMAN HEALTH, the Center for Disease Control and international cancer research institution all are decided to be first kind carcinogenic substance with it.The many countries and the World Health Organization have all formulated strict standard to the content of arsenic in the tap water.WHO, Japan, Germany, the U.S. and China successively adjust to 0.01mg/L with the sanitary standard for drinking water of arsenic by 0.05 original mg/L.EPA also plans from now on this control criterion to be upgraded to 0.002mg/L.Therefore, countries in the world all exploiting economy, efficient, practical drinking water deep arsenic removal technology as one of major tasks of environment protection and safety and Health work.Arsenic in the tap water mainly exists with the form of inorganic arsenic hydrochlorate (pentavalent arsenic) and arsenite (trivalent arsenic), and wherein trivalent arsenic toxicity is big, difficult removes, and is the most important thing of exploitation water depth arsenic removal technology.Along with the development of water quality inspection technique, like giardia lamblia and Cryptosporidium two worm problems, water flea, red worm problem, biologically stable problem of water or the like also becomes one of drinking-water quality safety control focal point.
In recent years, red stone, manganese oxide are the research and development and the application of the arsenic-removing adsorption agent of representative, obtain major progress.But the macrobead sorbent material needs the ADSORPTION IN A FIXED BED device, and investment is big, maintenance is loaded down with trivial details, dumb; Small-particle sorbent material physical strength is low, settling property is undesirable, solid-liquid separation is difficult, and sorbent material is prone to get into the tap water feedwater piping, causes secondary pollution; And this type of sorbent material for " two worms ' ', water flea and algae all can not effectively remove.
In recent years, ultra-filtration technique has received great concern in the drinking water treatment field.Ultrafiltration can be removed PM for particulate matter in the water effectively, and delivery turbidity is reduced to below the 0.1NTU, and can remove the macromole organic pollutant, can hold back the mikrobes such as two worms, water flea, red worm, algae, bacterium even virus near 100%.But ultra-filtration technique can not effectively be removed inorganic arsenic in the water separately.
Chinese patent number: 201010279926.0 applyings date: 2010-09-07 discloses a kind of Removal of Arsenic in Drinking Water method and system; Step is: 1, former water adds at the inlet channel upslide that liquid chlorine is laggard goes into distributing well, the add-on of liquid chlorine with distributing well water outlet residual chlorine amount at 1.40～1.60mg/L; Trivalent arsenic in the former water is oxidized to pentavalent arsenic; 2, be dispensed to the coagulative precipitation tank of rear end after the distributing well voltage stabilizing, add the FeCL3 of 10mgFe/L, and in coagulative precipitation tank, stop 15～20min at the coagulative precipitation tank inlet channel; The coagulative precipitation tank water outlet gets into filtering basin; 3, the filtering basin water outlet gets into water tank, and hyperfiltration membrane assembly is sent in the water tank water outlet, and reverse osmosis membrane assembly is sent in the water outlet of hyperfiltration membrane assembly; 4, the water outlet of reverse osmosis membrane assembly is collected and is sent into the product water tank, produces the water outlet of water tank part and is sent to membrane module, and all the other water outlets get into clean water basin.It has advantages such as arsenic removal is thorough, removal efficient is high, safe and reliable, can effectively remove trace suspension thing, bacterium, virus in the water.< 0.01mgAs/>L still than higher, can not eliminate the harm of arsenic to human body to arsenic concentration in the water after but this patent is handled, and has satisfied not people's tap water requirement.And this invention floor space is bigger, and production cost is higher.
Literature search shows, does not see bibliographical information for the oxidation absorption integral drinking water arsenic removing apparatus and the method that adopt ultra-filtration membrane.
Summary of the invention
1. invent the technical problem that will solve
To contain city and the rural potable water arsenic contamination that arsenic area and sudden arsenic-polluted incident cause by height; The concentration of arsenic was still higher after existing arsenic removing apparatus and method were handled; The production cost problem of higher; The present invention provides a kind of oxidation absorption integral drinking water arsenic removing apparatus and method; Oxidation, absorption and membrane sepn organically being combined, place and accomplish the arsenic removal process in the one reaction pool, is a kind of deeply removing arsenic technology and device of being convenient to that practical applications, fixed investment are supported, running cost is cheap, guaranteeing drinking-water quality safety.
2. technical scheme
Technical scheme of the present invention is following:
A kind of oxidation absorption integral drinking water arsenic removing apparatus comprises water inflow control system, reactor drum and ultrafiltration membrance filter system, also comprises aeration oxidation system, sludge drainage system and go out water control system that described water inflow control system is connected in the reactor drum; Described ultrafiltration membrance filter system is positioned at the middle and lower part of reactor drum, and with go out water control system and be connected; Described sludge drainage system comprises mud valve and shore pipe, and mud valve is positioned on the shore pipe, is used to control the switching of shore pipe, and an end of shore pipe is connected the bottom of reactor drum or lower part of sidewall of reactor; Described aeration oxidation system comprises aeration tube, intake valve and pneumatic pump, and aeration tube is positioned at the middle and lower part of reactor drum, and the outside that an end of aeration tube stretches out reactor drum is connected with pneumatic pump with intake valve successively; Describedly go out water control system and connected to form successively by flowing water Valve, suction pump and rising pipe, flowing water Valve and ultrafiltration membrance filter system pass through pipe connection.
On the described connecting tube that goes out water control system vacuum meter is arranged, be positioned on the pipeline that connects flowing water Valve and ultrafiltration membrance filter system, be used to read out the air pressure that water control system aspirates.
Comprise that also back-purge system and sorbent material add pipe, described back-purge system comprises washpipe and back flush valves, and described washpipe is connected between back-purge system vacuum meter and the flowing water Valve through back flush valves; The end that described sorbent material adds pipe stretches in the reactor drum.
Described water inflow control system is connected and composed through pipeline by water inlet pipe, lift pump, elevated tank and permanent position water tank successively, also can directly connect under the situation of run by gravity on the water tank of permanent position.
Described aeration oxidation system also comprises gas meter, and gas meter inserts between aeration tube and intake valve.
Described ultrafiltration membrance filter system comprises hyperfiltration membrane assembly and ultra-filtration membrane, and ultra-filtration membrane is wrapped on the hyperfiltration membrane assembly, and the aperture of said ultra-filtration membrane is 0.0l micron～0.05 micron.
A kind of oxidation absorption integral drinking water dearsenicating method may further comprise the steps:
(1) the pending arsenic contamination tap water that receives is added in the reactor drum through water inflow control system;
(2) pneumatic pump adds oxygenant and carries out aeration in reactor drum, trivalent arsenic in the water is oxidized to pentavalent arsenic, and mixes, and GWR is 4: 1～40: 1;
(3) in reactor drum, add sorbent material, be used for arsenic-adsorbing;
(4) after water reacts 2～20min in reactor drum, go out water control system and start, extract the water after handling out;
Further, further comprising the steps of:
(5) the saturated sorbent material of discharging outside reactor drum, the control residence time of sorbent material in reactor drum is at 10d～60d; The saturated sorbent material of discharging can be used as sludge disposal, recycles after also can regenerating;
(6) water control system is closed out in the cleaning of ultrafiltration membrance filter system, opens back-purge system, and back-purge system is connected with water pump, moves the water to flow in the reactor drum through the ultrafiltration membrance filter system, and the ultrafiltration membrance filter system in the reactor drum is cleaned.For guaranteeing membrane flux, regularly carry out back flushing to the ultrafiltration membrance filter system, the recoil cycle looks swabbing pressure and the membrane flux of hyperfiltration membrane assembly and decides; Close flowing water Valve during the hyperfiltration membrane assembly back flushing, open back flush valves, washpipe is received on the water pump, make water pass through the ultrafiltration membrance filter system flow, accomplish flushing to reactor drum.
Said step (1) receive that arsenic can be inorganic trivalent arsenic in the arsenic contamination tap water, also can be inorganic pentavalent arsenic, total arsenic concentration is less than 1 mg/L; Oxygenant in the said step (2) can be an air, also can be the mixed gas that air and ozone or chlorine are formed, and the shared volume of mixed gas air is 95% ~ 99%.
Sorbent material in the said step (3) is red stone or manganese oxide, and its physical dimension of sorbent material is 10 microns～500 microns, and the sorbent material dosage is 50 ~ 200mg/L; Swabbing pressure is 5kPa～50kPa during going out water control system and draw water in the step (4), and membrane flux is at 5L/ m
2H～100L/ m
2In the h scope.
3. beneficial effect
Adopt device and method provided by the invention, compare, have following unusual effect with existing known technology:
(1) the present invention organically combines the oxidation in the drinking water treatment technology, absorption and film separation unit dexterously; Oxidation, absorption and membrane sepn placed in the same reactor drum accomplish; Construction costs and working cost have significantly been reduced; Reduce floor space significantly, be easy to maintenance management, easy to utilize;
(2) the present invention adopts the ultra-filtration membrane of aperture in 0.0l micron～0.05 micrometer range; When removing arsenic; Can also PM for particulate matter, macromole organic pollutant and mikrobe in the water be carried out effective solid-liquid separation in the oxidation adsorptive reactor, effectively control and remove mikrobes such as PM for particulate matter in the water, macromole organic pollutant, two worms, water flea, red worm, algae, bacteriophage;
(3) to adopt red stone, the manganese oxide of particle shape size in 10 microns～500 micrometer ranges be sorbent material in the present invention, can effectively inorganic arsenic be removed from water body, and low price, reduce processing cost effectively;
(4) the present invention adopts lower film swabbing pressure and membrane flux; Further reduce energy consumption, and can effectively delay the film pollution, reduced the number of times of cleaning of film physics and matting; And have back-purge system; To the convenience for washing of film, prolong the work-ing life of film, reduce the maintenance operation expense of this technology;
(5) the present invention utilizes the aeration oxygenizement that high toxicity, the difficult trivalent arsenic of removing are converted into hypotoxicity, the easy pentavalent arsenic of removing; Utilize sorbent material adsorption and enrichment effect efficiently that inorganic arsenic is separated removal from tap water; Utilize at last ultra-filtration membrane efficiently interception capacity the saturated sorbent material in the reactor drum is reclaimed, for condition has been created in the follow-up regeneration of sorbent material, recycling, and the effective arsenic in the water of place to go.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1;
Fig. 2 is a structural representation of the present invention.
Among the figure: 1. water inlet pipe 2. lift pumps 3. elevated tanks 4. a perseverance water tank 5. reactor drums 6. ultrafiltration membrance filter systems 7. vacuum meters, 8. flowing water Valves, 9. suction pumps, 10. rising pipes, 11. back flush valves, 12. washpipes, 13. pneumatic pumps, 14. intake valves, 15. gas meters, 16. aeration tubes, 17. mud valves, 18. sorbent materials add pipe.
Embodiment
Below through embodiment the present invention is further described:
As shown in Figure 2; A kind of oxidation absorption integral drinking water arsenic removing apparatus; Comprise water inflow control system, reactor drum 5 and ultrafiltration membrance filter system 6, also comprise aeration oxidation system, sludge drainage system and go out water control system that described water inflow control system is connected in the reactor drum 5; Described ultrafiltration membrance filter system 6 is positioned at the middle and lower part of reactor drum 5, and with go out water control system and be connected; Described sludge drainage system comprises mud valve 17 and shore pipe, and mud valve 17 is positioned on the shore pipe, is used to control the switching of shore pipe, and an end of shore pipe is connected the bottom of reactor drum 5 or lower part of reactor drum 5 sidewalls; Described aeration oxidation system comprises aeration tube 16, intake valve 14 and pneumatic pump 13, and aeration tube 16 is positioned at the middle and lower part of reactor drum 5, and the outside that an end of aeration tube 16 stretches out reactor drum 5 is connected with pneumatic pump 13 with intake valve 14 successively; Describedly go out water control system and connected to form successively by flowing water Valve 8, suction pump 9 and rising pipe 10, flowing water Valve 8 passes through pipe connection with ultrafiltration membrance filter system 6.
On the described connecting tube that goes out water control system vacuum meter 7 is arranged, be positioned on the pipeline that connects flowing water Valve 8 and ultrafiltration membrance filter system 6, be used to read out the air pressure of water control system suction.
Comprise that also back-purge system and sorbent material add pipe 18, described back-purge system comprises washpipe 12 and back flush valves 11, and described washpipe 12 is connected between back-purge system vacuum meter 7 and the flowing water Valve 8 through back flush valves 11; The end that described sorbent material adds pipe 18 stretches in the reactor drum 5.
Described water inflow control system is connected and composed through pipeline by water inlet pipe 1, lift pump 2, elevated tank 3 and permanent position water tank 4 successively, also can directly connect under the situation of run by gravity on the water tank 4 of permanent position.
Described aeration oxidation system also comprises gas meter 15, and gas meter 15 inserts between aeration tube 16 and intake valve 14.
Described ultrafiltration membrance filter system 6 comprises hyperfiltration membrane assembly and ultra-filtration membrane, and ultra-filtration membrane is wrapped on the hyperfiltration membrane assembly, and the aperture of said ultra-filtration membrane is 0.0l micron～0.05 micron.
A kind of oxidation absorption integral drinking water dearsenicating method may further comprise the steps:
(1) the pending arsenic contamination tap water that receives is added in the reactor drum 5 through water inflow control system;
(2) pneumatic pump 13 adds oxygenant and carries out aeration in reactor drum 5, trivalent arsenic in the water is oxidized to pentavalent arsenic, and mixes, and GWR is 4: 1～40: 1;
(3) in reactor drum 5, add sorbent material, be used for arsenic-adsorbing;
(4) after water reacts 2～20min in reactor drum 5, go out water control system and start, extract the water after handling out;
(5) the saturated sorbent material of discharging outside reactor drum 5, the control residence time of sorbent material in reactor drum 5 is at 10d～60d;
(6) water control system is closed out in the cleaning of ultrafiltration membrance filter system 6, opens back-purge system, and back-purge system is connected with water pump, moves the water to flow in the reactor drum 5 through ultrafiltration membrance filter system 6, and the ultrafiltration membrance filter system 6 in the reactor drum 5 is cleaned.
Said step (1) receive that arsenic can be inorganic trivalent arsenic in the arsenic contamination tap water, also can be inorganic pentavalent arsenic, total arsenic concentration is less than 1 mg/L; Oxygenant in the said step 2 can be an air, also can be the mixed gas that air and ozone or chlorine are formed, and the shared volume of mixed gas air is 95% ~ 99%.
Sorbent material in the said step (3) is red stone or manganese oxide, and its physical dimension of sorbent material is 10 microns～500 microns, and the sorbent material dosage is 50 ~ 200 mg/L; Swabbing pressure is 5 kPa～50 kPa during going out water control system and draw water in the step (4), and membrane flux is at 5L/ m
2H～100L/ m
2In the h scope.
Embodiment 1
As shown in Figure 1; A kind of oxidation absorption integral drinking water arsenic removing apparatus; Comprise water inflow control system, reactor drum 5, ultrafiltration membrance filter system 6, also comprise aeration oxidation system, sludge drainage system and go out water control system that described water inflow control system is connected in the reactor drum 5; Described ultrafiltration membrance filter system 6 is positioned at the middle and lower part of reactor drum 5, and with go out water control system and be connected; Described sludge drainage system comprises mud valve 17 and shore pipe, and mud valve 17 is positioned on the shore pipe, is used to control the switching of shore pipe, and an end of shore pipe is connected the bottom of reactor drum 5 or lower part of reactor drum 5 sidewalls; Described aeration oxidation system comprises aeration tube 16, intake valve 14 and pneumatic pump 13, and aeration tube 16 is positioned at the middle and lower part of reactor drum 5, and the outside that an end of aeration tube 16 stretches out reactor drum 5 is connected with pneumatic pump 13 with intake valve 14 successively; Describedly go out water control system and connected to form successively by flowing water Valve 8, suction pump 9 and rising pipe 10, flowing water Valve 8 passes through pipe connection with ultrafiltration membrance filter system 6.
On the described connecting tube that goes out water control system vacuum meter 7 is arranged, be positioned on the pipeline that connects flowing water Valve 8 and ultrafiltration membrance filter system 6, be used to read out the air pressure of water control system suction.
Comprise that also back-purge system and sorbent material add pipe 18, described back-purge system comprises washpipe 12 and back flush valves 11, and described washpipe 12 is connected between back-purge system vacuum meter 7 and the flowing water Valve 8 through back flush valves 11; The end that described sorbent material adds pipe 18 stretches in the reactor drum 5.Described aeration oxidation system also comprises gas meter 15, and gas meter 15 inserts between aeration tube 16 and intake valve 14.Described ultrafiltration membrance filter system 6 comprises hyperfiltration membrane assembly and ultra-filtration membrane, and ultra-filtration membrane is wrapped on the hyperfiltration membrane assembly.
Oxidation absorption integral drinking water dearsenicating method may further comprise the steps:
(1) the pending arsenic contamination tap water that receives is added in the reactor drum 5 through water inflow control system;
(2) pneumatic pump 13 adds oxygenant and carries out aeration in reactor drum 5, trivalent arsenic in the water is oxidized to pentavalent arsenic, and mixes;
(3) in reactor drum 5, add sorbent material, be used for arsenic-adsorbing;
(4) after water reacts 2min in reactor drum 5, go out water control system and start, extract the water after handling out; Arsenic content is less than 0.002 mg/L in the tap water of processing back
The arsenic contamination tap water that receives that said step (1) is pending contains arsenic 0.5mg/L, and the oxygenant in the said step (2) is an air, receives the arsenic contamination tap water that the run by gravity that has of self is arranged; Can flow into permanent position water tank 4 through pipeline, get into reactor drum 5 again, pneumatic pump 13 adds oxygenant and carries out aeration in reactor drum 5; Trivalent arsenic in the water is oxidized to pentavalent arsenic, and mixes, GWR is 30: 1; Simultaneously, in reactor drum 5, add sorbent material, sorbent material choice of powder red stone; Particle size is 10 microns～50 microns, and dosage is 100mg/L.The immersion hollow fiber ultrafiltration membrane that ultra-filtration membrane adopts Jiangsu NJU Jinshan Environmental Protection Technology Co., Ltd. to provide, membrane pore size is 0.03 micron, membrane material is a SE.The water flux excessively of ultra-filtration membrane is 30L/ m
2H, the ultra-filtration membrane water outlet is extracted out by suction pump 9.Total arsenic concentration is lower than 0.002 mg/L in the tap water after the processing.Compare fixed bed processing mode in the past, adopt apparatus of the present invention and method, not only can remove two worms, algae, virus etc. synchronously, and water treatment construction investment per ton can reduce by 30%, working cost reduces by 40%.
Embodiment 2
As shown in Figure 2; A kind of oxidation absorption integral drinking water arsenic removing apparatus; Comprise water inflow control system, reactor drum 5, ultrafiltration membrance filter system 6, also comprise aeration oxidation system, sludge drainage system and go out water control system that described water inflow control system is connected in the reactor drum 5; Described ultrafiltration membrance filter system 6 is positioned at the middle and lower part of reactor drum 5, and with go out water control system and be connected; Described sludge drainage system comprises mud valve 17 and shore pipe, and mud valve 17 is positioned on the shore pipe, is used to control the switching of shore pipe, and an end of shore pipe is connected the bottom of reactor drum 5 or lower part of reactor drum 5 sidewalls; Described aeration oxidation system comprises aeration tube 16, intake valve 14 and pneumatic pump 13, and aeration tube 16 is positioned at the middle and lower part of reactor drum 5, and the outside that an end of aeration tube 16 stretches out reactor drum 5 is connected with pneumatic pump 13 with intake valve 14 successively; Describedly go out water control system and connected to form successively by flowing water Valve 8, suction pump 9 and rising pipe 10, flowing water Valve 8 passes through pipe connection with ultrafiltration membrance filter system 6.
On the described connecting tube that goes out water control system vacuum meter 7 is arranged, be positioned on the pipeline that connects flowing water Valve 8 and ultrafiltration membrance filter system 6, be used to read out the air pressure of water control system suction.
Comprise that also back-purge system and sorbent material add pipe 18, described back-purge system comprises washpipe 12 and back flush valves 11, and described washpipe 12 is connected between back-purge system vacuum meter 7 and the flowing water Valve 8 through back flush valves 11; The end that described sorbent material adds pipe 18 stretches in the reactor drum 5.
Described water inflow control system is connected and composed through pipeline by water inlet pipe 1, lift pump 2, elevated tank 3 and permanent position water tank 4 successively, also can directly connect under the situation of run by gravity on the water tank 4 of permanent position.
Described aeration oxidation system also comprises gas meter 15, and gas meter 15 inserts between aeration tube 16 and intake valve 14.
Described ultrafiltration membrance filter system 6 comprises hyperfiltration membrane assembly and ultra-filtration membrane; Ultra-filtration membrane is wrapped on the hyperfiltration membrane assembly; The immersion hollow fiber ultrafiltration membrane that ultra-filtration membrane adopts Yongtai, Jiangsu Environmental Protection Technology Co., Ltd to provide, membrane pore size is 0.01 micron, membrane material is for gathering inclined to one side fluorine vinylchlorid.The water flux excessively of ultra-filtration membrane is 50L/ m
2H,
A kind of oxidation absorption integral drinking water dearsenicating method may further comprise the steps:
(1) the pending arsenic contamination tap water that receives is added in the reactor drum 5 through water inflow control system; Be promoted to elevated tank 3 by lift pump 2, get into reactor drum 5 through permanent position water tank 4 again; The pending arsenic contamination tap water that receives contains arsenic 0.1mg/L
(2) pneumatic pump 13 adds oxygenant and carries out aeration in reactor drum 5, and oxygenant is the mixed gas of air and ozone, and the volume of its air accounts for 95%, and GWR is 10: 1, trivalent arsenic in the water is oxidized to pentavalent arsenic, and mixes;
(3) in reactor drum 5, add sorbent material, sorbent material choice of powder red stone, particle size is 10 microns～50 microns, dosage is 50mg/L.Be used for arsenic-adsorbing;
(4) after water reacts 5min in reactor drum 5, go out water control system and start, extract the water after handling out; Arsenic content is less than 0.002 mg/L in the tap water of processing back; The swabbing pressure of suction pump 9 is measured by vacuum meter 7 in 15kPa～25kPa scope when going out water control system and drawing water.
(5) behind the 10d, open mud valve 17 saturated sorbent material in the reactor drum 5 is discharged, can be used as sludge disposal, recycle after also can regenerating;
(6) water control system is closed out in the cleaning of ultrafiltration membrance filter system 6, opens back-purge system, and the ultrafiltration membrance filter system 6 in the reactor drum 5 is cleaned.For guaranteeing membrane flux, regularly carry out back flushing to ultrafiltration membrance filter system 6, the recoil cycle looks swabbing pressure and the membrane flux of hyperfiltration membrane assembly and decides; Close flowing water Valve 8 during the hyperfiltration membrane assembly back flushing, open back flush valves 11, washpipe 12 is received on the water pump, make water flow to reactor drum 5, accomplish flushing through ultrafiltration membrance filter system 6.
Compare fixed bed processing mode in the past, adopt apparatus of the present invention and method, not only can remove two worms, algae, virus etc. synchronously, and water treatment construction investment per ton can reduce by 25%, working cost reduces by 35%.
With embodiment 2, different is, the pending arsenic contamination tap water that receives contains arsenic 0.8mg/L, and oxygenant is the mixed gas of air and ozone, and the volume of its air accounts for 99%, and GWR is 40: 1; Sorbent material choice of powder red stone, particle size are 100 microns～250 microns, and dosage is 180mg/L, are 15min in these 5 internal reaction times of reactor drum; The swabbing pressure of suction pump 9 in 20kPa～30kPa scope, the immersion hollow fiber ultrafiltration membrane that 6 employing Jiangsu Yongtai Environmental Protection Technology Co., Ltd of ultrafiltration membrance filter system provide, membrane pore size is 0.02 micron, membrane material is a SE.The water flux excessively of ultra-filtration membrane is 35L/ m
2H; Opening mud valve 17 behind the 20d discharges saturated sorbent material in the reactor drum 5.
Compare fixed bed processing mode in the past, adopt apparatus of the present invention and method, not only can remove two worms, algae, virus etc. synchronously, and water treatment construction investment per ton can reduce by 32%, working cost reduces by 37%.
With embodiment 2, different is, the pending arsenic contamination tap water that receives contains arsenic 0.1mg/L, and oxygenant is the mixed gas of air and chlorine, and the volume of its air accounts for 95%, and GWR is 10: 1; Absorbent powder manganese oxide, particle size are 30 microns～100 microns, and dosage is 40mg/L, are 8min in these 5 internal reaction times of reactor drum; The swabbing pressure of suction pump 9 is in 35kPa～50kPa scope; Measure by vacuum meter 7; The immersion hollow fiber ultrafiltration membrane that 6 employing Jiangsu Yongtai Environmental Protection Technology Co., Ltd of ultrafiltration membrance filter system provide, membrane pore size is 0.05 micron, membrane material is a SE.The water flux excessively of ultra-filtration membrane is 100L/ m
2H; Opening mud valve 17 behind the 60d discharges saturated sorbent material in the reactor drum 5.
Compare fixed bed processing mode in the past, adopt apparatus of the present invention and method, not only can remove two worms, algae, virus etc. synchronously, and water treatment construction investment per ton can reduce by 27%, reduce working cost 42%.
With embodiment 2, different is, the pending arsenic contamination tap water that receives contains arsenic 0.6mg/L, and oxygenant is the mixed gas of air and chlorine, and the volume of its air accounts for 99%, and GWR is 10: 1; Sorbent material is selected the loading type ferric oxide of Yongtai, Jiangsu Environmental Protection Technology Co., Ltd for use, and particle size is 300 microns～500 microns, and dosage is 70mg/L.The immersion hollow fiber ultrafiltration membrane that 6 employing Jiangsu Yongtai Environmental Protection Technology Co., Ltd of ultrafiltration membrance filter system provide, membrane pore size is 0.03 micron, membrane material is a SE.In these 5 internal reaction times of reactor drum is 15min; The swabbing pressure of suction pump 9 is measured by vacuum meter 7 in 25kPa～40kPa scope; The water flux excessively of ultra-filtration membrane is 40L/ m
2H, the sorbent material residence time is 55d.
Compare fixed bed processing mode in the past; Adopt apparatus of the present invention and method; Total arsenic concentration is lower than 0.002 mg/L in the tap water, not only can remove two worms, algae, virus etc. synchronously, and water treatment construction investment per ton can reduce by 24%, reduce working cost 38%.
Embodiment 6
With embodiment 2, different is, the pending arsenic contamination tap water that receives contains arsenic 0.2mg/L, and oxygenant is the mixed gas of air and chlorine, and the volume of its air accounts for 98%, and GWR is 40: 1; Sorbent material is selected particulate oxidation iron for use, and particle size is 150 microns～500 microns, and dosage is 150mg/L.The immersion hollow fiber ultrafiltration membrane that ultrafiltration membrance filter system 6 adopts Jiangsu NJU Jinshan Environmental Protection Technology Co., Ltd. to provide, membrane pore size is 0.03 micron, membrane material is a SE.The water flux excessively of ultra-filtration membrane is 90L/ m
2H; In these 5 internal reaction times of reactor drum is 15min; The swabbing pressure of suction pump 9 is measured by vacuum meter 7 in 25kPa～40kPa scope; The sorbent material residence time is 40d.
Compare fixed bed processing mode in the past; Adopt apparatus of the present invention and method; Total arsenic concentration is lower than 0.002 mg/L in the tap water, not only can remove two worms, algae, virus etc. synchronously, and water treatment construction investment per ton can reduce by 30%, reduce working cost 40%.
Embodiment 7
With embodiment 2, different is, the pending arsenic contamination tap water that receives contains arsenic 1mg/L, and oxygenant is the mixed gas of air and ozone, and the volume of its air accounts for 96%, and GWR is 40: 1; Sorbent material choice of powder red stone, particle size are 20 microns～80 microns, and dosage is 200mg/L.The immersion hollow fiber ultrafiltration membrane that ultrafiltration membrance filter system 6 adopts Jiangsu NJU Jinshan Environmental Protection Technology Co., Ltd. to provide, membrane pore size is 0.03 micron, membrane material is a SE.The water flux excessively of ultra-filtration membrane is 5L/ m
2H; In these 5 internal reaction times of reactor drum is 18min; The swabbing pressure of suction pump 9 is measured by vacuum meter 7 in 10kPa～20kPa scope; The sorbent material residence time is 10d.
Compare fixed bed processing mode in the past; Adopt apparatus of the present invention and method; Total arsenic concentration is lower than 0.002 mg/L in the tap water, not only can remove two worms, algae, virus etc. synchronously, and water treatment construction investment per ton can reduce by 32%, reduce working cost 41%.
With embodiment 2, different is, the pending arsenic contamination tap water that receives contains arsenic 0.3mg/L, and oxygenant is the mixed gas of air and chlorine, and the volume of its air accounts for 98%, and GWR is 20: 1; Sorbent material is selected the particulate oxidation manganese of Yongtai, Jiangsu Environmental Protection Technology Co., Ltd for use, and particle size is 250 microns～500 microns, and dosage is 200mg/L.The immersion hollow fiber ultrafiltration membrane that ultrafiltration membrance filter system 6 adopts AM General company to provide, membrane pore size is 0.05 micron, membrane material is a SE.The water flux excessively of ultra-filtration membrane is 80L/ m
2H; In these 5 internal reaction times of reactor drum is 5min; The swabbing pressure of suction pump 9 is measured by vacuum meter 7 in 35kPa～50kPa scope; The sorbent material residence time is 10d.
Compare fixed bed processing mode in the past; Adopt apparatus of the present invention and method; Total arsenic concentration is lower than 0.002 mg/L in the tap water, not only can remove two worms, algae, virus etc. synchronously, and water treatment construction investment per ton can reduce by 26%, reduce working cost 34%.
Claims (10)
1. the integral drinking water arsenic removing apparatus is adsorbed in an oxidation; Comprise water inflow control system, reactor drum (5) and ultrafiltration membrance filter system (6); It is characterized in that also comprise aeration oxidation system, sludge drainage system and go out water control system, described water inflow control system is connected in the reactor drum (5); Described ultrafiltration membrance filter system (6) is positioned at the middle and lower part of reactor drum (5), and with go out water control system and be connected; Described sludge drainage system comprises mud valve (17) and shore pipe, and mud valve (17) is positioned on the shore pipe, is used to control the switching of shore pipe, and an end of shore pipe is connected the bottom of reactor drum (5) or lower part of reactor drum (5) sidewall; Described aeration oxidation system comprises aeration tube (16), intake valve (14) and pneumatic pump (13); Aeration tube (16) is positioned at the middle and lower part of reactor drum (5), and the outside that an end of aeration tube (16) stretches out reactor drum (5) is connected with pneumatic pump (13) with intake valve (14) successively; Describedly go out water control system and connected to form successively by flowing water Valve (8), suction pump (9) and rising pipe (10), flowing water Valve (8) passes through pipe connection with ultrafiltration membrance filter system (6).
2. oxidation absorption integral drinking water arsenic removing apparatus according to claim 1; It is characterized in that: on the described connecting tube that goes out water control system vacuum meter (7) is arranged; Be positioned on the pipeline that connects flowing water Valve (8) and ultrafiltration membrance filter system (6), be used to read out the air pressure of water control system suction.
3. oxidation absorption integral drinking water arsenic removing apparatus according to claim 1 and 2; It is characterized in that: comprise that also back-purge system and sorbent material add pipe (18); Described back-purge system comprises washpipe (12) and back flush valves (11), and described washpipe (12) is connected between back-purge system vacuum meter (7) and the flowing water Valve (8) through back flush valves (11); The end that described sorbent material adds pipe (18) stretches in the reactor drum (5).
4. oxidation absorption integral drinking water arsenic removing apparatus according to claim 1; It is characterized in that: described water inflow control system is connected and composed through pipeline by water inlet pipe (1), lift pump (2), elevated tank (3) and permanent position water tank (4) successively, also can directly connect under the situation of run by gravity on the permanent position water tank (4).
5. oxidation absorption integral drinking water arsenic removing apparatus according to claim 1, it is characterized in that: described aeration oxidation system also comprises gas meter (15), gas meter (15) inserts between aeration tube (16) and intake valve (14).
6. oxidation absorption integral drinking water arsenic removing apparatus according to claim 1; It is characterized in that: described ultrafiltration membrance filter system (6) comprises hyperfiltration membrane assembly and ultra-filtration membrane; Ultra-filtration membrane is wrapped on the hyperfiltration membrane assembly, and the aperture of said ultra-filtration membrane is 0.0l micron～0.05 micron.
7. the integral drinking water dearsenicating method is adsorbed in an oxidation, may further comprise the steps:
(1) the pending arsenic contamination tap water that receives is added in the reactor drum (5) through water inflow control system;
(2) pneumatic pump (13) adds oxygenant and carries out aeration in reactor drum (5), trivalent arsenic in the water is oxidized to pentavalent arsenic, and mixes, and GWR is 4: 1～40: 1;
(3) in reactor drum (5), add sorbent material, be used for arsenic-adsorbing;
(4) after water reacts 2～20min in reactor drum (5), go out water control system and start, extract the water after handling out.
8. oxidation absorption integral drinking water dearsenicating method according to claim 7 is characterized in that, and is further comprising the steps of:
(5) the saturated sorbent material of discharging outside reactor drum (5), the control residence time of sorbent material in reactor drum (5) is at 10d～60d;
(6) cleaning of ultrafiltration membrance filter system (6); Close out water control system, open back-purge system, back-purge system is connected with water pump; Move the water to flow in the reactor drum (5) through ultrafiltration membrance filter system (6), the ultrafiltration membrance filter system (6) in the reactor drum 5 is cleaned.
9. oxidation as claimed in claim 7 absorption integral drinking water dearsenicating method is characterized in that: said step (1) receive that arsenic can be inorganic trivalent arsenic in the arsenic contamination tap water, also can be inorganic pentavalent arsenic, total arsenic concentration is less than 1mg/L; Oxygenant in the said step (2) can be an air, also can be the mixed gas that air and ozone or chlorine are formed, and the shared volume of mixed gas air is 95% ~ 99%.
10. oxidation absorption integral drinking water dearsenicating method according to claim 7; It is characterized in that: the sorbent material in the said step (3) is red stone or manganese oxide; Its physical dimension of sorbent material is 10 microns～500 microns, and the sorbent material dosage is 50 ~ 200 mg/L; Swabbing pressure is 5kPa～50kPa during going out water control system and draw water in the step (4), and membrane flux is at 5L/ m
2H～100L/ m
2In the h scope.
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