CN116924631A - Short-flow high-quality water treatment device and water treatment method - Google Patents
Short-flow high-quality water treatment device and water treatment method Download PDFInfo
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- CN116924631A CN116924631A CN202311129853.0A CN202311129853A CN116924631A CN 116924631 A CN116924631 A CN 116924631A CN 202311129853 A CN202311129853 A CN 202311129853A CN 116924631 A CN116924631 A CN 116924631A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 241
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000000919 ceramic Substances 0.000 claims abstract description 97
- 239000012528 membrane Substances 0.000 claims abstract description 97
- 238000004062 sedimentation Methods 0.000 claims abstract description 58
- 238000005189 flocculation Methods 0.000 claims abstract description 39
- 230000016615 flocculation Effects 0.000 claims abstract description 39
- 238000001556 precipitation Methods 0.000 claims abstract description 34
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 85
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 64
- 230000003197 catalytic effect Effects 0.000 claims description 55
- 229910052799 carbon Inorganic materials 0.000 claims description 22
- 239000004576 sand Substances 0.000 claims description 20
- 230000003068 static effect Effects 0.000 claims description 13
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 9
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 5
- 239000000460 chlorine Substances 0.000 claims description 5
- 229910052801 chlorine Inorganic materials 0.000 claims description 5
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 238000005202 decontamination Methods 0.000 abstract description 6
- 230000003588 decontaminative effect Effects 0.000 abstract description 6
- 239000003651 drinking water Substances 0.000 abstract description 6
- 235000020188 drinking water Nutrition 0.000 abstract description 6
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 5
- DTGKSKDOIYIVQL-MRTMQBJTSA-N Isoborneol Natural products C1C[C@@]2(C)[C@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-MRTMQBJTSA-N 0.000 description 17
- CKDOCTFBFTVPSN-UHFFFAOYSA-N borneol Natural products C1CC2(C)C(C)CC1C2(C)C CKDOCTFBFTVPSN-UHFFFAOYSA-N 0.000 description 17
- -1 dimethyl isoborneol Chemical compound 0.000 description 17
- DTGKSKDOIYIVQL-UHFFFAOYSA-N dl-isoborneol Natural products C1CC2(C)C(O)CC1C2(C)C DTGKSKDOIYIVQL-UHFFFAOYSA-N 0.000 description 17
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 238000005276 aerator Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
- C02F1/763—Devices for the addition of such compounds in gaseous form
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
A short-process high-quality water treatment device and a water treatment method relate to the technical field of drinking water treatment. The device comprises a sieve plate flocculation device, a sedimentation device, a ceramic membrane area and a clean water tank which are sequentially communicated according to the water flow direction; the sedimentation device is a horizontal pipe sedimentation device, and effluent of the horizontal pipe sedimentation device directly enters the ceramic membrane area through a pipeline. The method sequentially comprises a sieve plate flocculation step, a horizontal tube precipitation step, a ceramic membrane decontamination step and a conventional disinfection step. Has the advantages of relatively short water treatment flow, high quality after water treatment and low water treatment cost.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a short-flow high-quality water treatment device and a corresponding water treatment method thereof.
Background
At present, the drinking water execution of China, sanitary Standard for Drinking Water, is GB5749-2022, and the turbidity (nephelometric turbidity unit) requirement is less than 1NTU b Compared with the prior standard GB5749-2006, the content of the dimethyl isoborneol is increased to be less than 0.00001 mg/L.
Most of the water sources of the drinking water come from reservoirs, rivers or other surface waters, and the water sources are called raw water, and the drinking water can be used for human beings after being treated. The raw water is subjected to surface runoff and precipitation, chemical fertilizers, pesticides and other substances can enter a reservoir along with rainwater in the agricultural production process, meanwhile, the reservoir has poor fluidity, so that a water source is slightly polluted, wherein the water source is mainly in an excessive condition, and in addition, the condition that the industrial water which does not reach the standard is discharged into a river exists, so that the raw water can be roughly divided into three types, namely the conventional raw water without organic pollutants; the second type is micro-polluted raw water of which the concentration of dimethyl isoborneol is less than or equal to 0.00002 mg/L; the three types are pollution raw water of which the concentration of dimethyl isoborneol is more than 0.00002 mg/L.
Aiming at the prior art for solving the turbidity, one is to adopt a conventional treatment and advanced treatment process, such as a treatment process of flocculation precipitation, filtration and an O3/activated carbon filter, wherein flocculation precipitation effluent cannot directly enter an advanced treatment system and can enter the activated carbon filter after being treated by the filter, so that the flow is longer and the overall investment is high; another type of water purification equipment, such as CN202080957U, named "water purification equipment for underground emergency refuge of coal mine", adopts a mode of pretreatment, precipitation device and ceramic membrane separation to treat raw water. In the two existing treatment processes, the former adopts a filter tank, and the latter adopts a preprocessor, because the adopted sedimentation device cannot effectively reduce the turbidity of water to meet the requirement of a subsequent advanced treatment system, the former adopts the filter tank additionally arranged at the downstream of the sedimentation device, and the latter adopts the original water to be pretreated and then enters the sedimentation device so as to meet the requirement of the subsequent advanced treatment, thus the set filter tank or the pretreatment device ensures that the overall process flow of water treatment is relatively longer, and the advanced treatment field is planned in a factory due to the long overall process flow, but most water purification plants are compact and do not have enough places to construct treatment facilities.
Aiming at solving the problem of removing dimethyl isoborneol in the prior art, the application publication number is CN 107673504A, the method is named as a method for purifying drinking water by combining an ozone ceramic membrane activated carbon filter, and ozone is continuously introduced into the bottom of a ceramic membrane in the ceramic membrane through an ozone generator, so that the ozone and mixed liquid are fully mixed, and a floccule turbid liquid is obtained. The method directly oxidizes pollutants by adopting ozone and further removes organic matters such as dimethyl isoborneol through the adsorption of active carbon, and has the defect of extremely low ozone utilization rate and high water treatment cost.
Disclosure of Invention
The main purpose of the invention is to provide a short-flow high-quality water treatment device;
another object of the invention is to provide a short-flow high quality water treatment process.
In order to achieve the main purpose, the short-flow high-quality water treatment device provided by the invention comprises a sieve plate flocculation device, a sedimentation device, a ceramic membrane area and a clean water tank which are sequentially communicated according to the water flow direction; the sedimentation device is a horizontal pipe sedimentation device, and effluent of the horizontal pipe sedimentation device directly enters the ceramic membrane area through a pipeline.
As can be seen from the scheme, the sedimentation device with extremely high sedimentation efficiency is adopted to sediment the flocculated water, so that the turbidity of the flocculated water is less than or equal to 1NTU b Basically meets the requirements of the new national standard on turbidity, thus the sedimentThe effluent can directly enter the ceramic membrane area to remove suspended matters with small particle size, so that the turbidity of the effluent in the ceramic membrane area can reach 0.1NTU b In the following, the water becomes high quality water, and meanwhile, compared with the prior art, a preprocessor arranged in front of the sedimentation device or a filter tank arranged behind the sedimentation device is omitted, so that the flow is relatively short. The scheme is suitable for treating the conventional raw water without organic pollutants.
The further scheme is that the length-diameter ratio A of the horizontal tube precipitation device is more than or equal to 50;
namely A=L/D is more than or equal to 50, wherein L is the length of the horizontal pipe sedimentation device in the water flow direction, and the unit is millimeter; d is the equivalent diameter of the horizontal tube unit in millimeters. The scheme has the advantages that the effluent turbidity of the horizontal pipe sedimentation device can be further ensured to be less than or equal to 1NTU b 。
The other further scheme is that a static mixer is communicated with an upstream pipeline of the sieve plate flocculation device; the pipeline at the upstream of the static mixer or the raw water taking point is communicated with a powder activated carbon feeder. The scheme is suitable for treating the slightly polluted raw water of which the concentration of the dimethyl isoborneol is less than or equal to 0.00002 mg/L.
In order to achieve the main purpose of the invention, the other short-flow high-quality water treatment device provided by the invention comprises a sieve plate flocculation device, a sedimentation device, a catalytic ceramic membrane area and a clean water tank which are sequentially communicated according to the water flow direction; the sedimentation device is a horizontal pipe sedimentation device, and effluent of the horizontal pipe sedimentation device directly enters the catalytic ceramic membrane area through a pipeline; the ozone dissolving device comprises an ozone generator, a pressurized dissolved air tank and a second releaser, wherein the outlet of the ozone generator is communicated with the inlet of the pressurized dissolved air tank through a pipeline, the outlet of the pressurized dissolved air tank is connected with the second releaser through a pipeline, and the second releaser is arranged in the catalytic ceramic membrane zone; and a carbon sand filter is also arranged between the catalytic ceramic membrane area and the clean water tank.
As can be seen from the scheme, the sedimentation device with extremely high sedimentation efficiency is adopted to sediment the flocculated water, so that the turbidity of the flocculated water is less than or equal to 1NTU b Basically meets the requirements of a new national standard on turbidity, so that the precipitated effluent can directly enter a catalytic ceramic membrane area to remove suspended matters with small particle size, and the turbidity of the effluent in the ceramic membrane area can reach 0.1NTU b In the following, the water becomes high quality water, and meanwhile, compared with the prior art, a preprocessor arranged in front of the sedimentation device or a filter tank arranged behind the sedimentation device is omitted, so that the flow is relatively short. And because the ozone gas dissolving device for adding ozone into the catalytic ceramic membrane area is additionally arranged, on one hand, the dimethyl isoborneol can be effectively removed, on the other hand, the utilization rate of ozone is improved, and compared with the prior art, the water treatment cost is greatly reduced. The scheme is particularly suitable for treating the polluted raw water with the concentration of dimethyl isoborneol more than 0.00002 mg/L.
In order to achieve the main purpose of the invention, the short-flow high-quality water treatment device provided by the invention comprises a sieve plate flocculation device, a sedimentation device, an ozone contact area, a catalytic ceramic membrane area and a clean water tank which are sequentially communicated according to the water flow direction; the sedimentation device is a horizontal pipe sedimentation device, and effluent of the horizontal pipe sedimentation device directly enters the ozone contact area through a pipeline, and the ozone contact area and the catalytic ceramic membrane area are arranged in the same pool and are adjacently arranged; the ozone dissolving device comprises an ozone generator, a pressurized dissolved air tank and a first releaser, wherein the outlet of the ozone generator is communicated with the inlet of the pressurized dissolved air tank through a pipeline, the outlet of the pressurized dissolved air tank is connected with the first releaser through a pipeline, and the first releaser is arranged in the ozone contact area; and a carbon sand filter is also arranged between the catalytic ceramic membrane area and the clean water tank.
According to the scheme, the water after flocculation is precipitated by adopting the horizontal pipe precipitation device with extremely high precipitation efficiency, so that the turbidity of the water after flocculation is less than or equal to 1NTUb, and the requirements of a new national standard on the turbidity are basically met, therefore, the precipitated effluent can directly enter an ozone contact area and a catalytic ceramic membrane area to remove suspended matters with small particle size, the turbidity of the effluent in the ceramic membrane area can be less than 0.1NTUb, and the water becomes high-quality water, and meanwhile, a preprocessor arranged in front of the precipitation device or a filter tank arranged behind the precipitation device is omitted compared with the prior art, so that the flow is relatively short. And because the ozone gas dissolving device for adding ozone into the catalytic ceramic membrane area is additionally arranged, on one hand, the dimethyl isoborneol can be effectively removed, on the other hand, the utilization rate of ozone is improved, and compared with the prior art, the water treatment cost is greatly reduced. The scheme is more suitable for treating the severely polluted raw water with the concentration of dimethyl isoborneol more than 0.00002 mg/L.
The outlet of the pressurized dissolved air tank is also connected with a second releaser through a pipeline, and the second releaser is arranged in the catalytic ceramic membrane area.
In order to achieve another object of the present invention, the water treatment method provided by the present invention sequentially includes the steps of:
step one, raw water to which flocculant is added enters a sieve plate flocculation device, the adding amount of the flocculant is 10mg/L-30mg/L, the flocculation time is 15min-25min, and flocculated water enters a horizontal pipe sedimentation device;
step two, the water precipitation time of entering the horizontal pipe precipitation device is 10min-30min, and the turbidity of the effluent is less than or equal to 1NTU b ；
Step three, the precipitated water directly enters a ceramic membrane area with the aperture of 10nm-100nm, the ceramic membrane area is continuously aerated by a blower, and the effluent of the ceramic membrane area enters a clean water tank;
and fourthly, adding sodium hypochlorite or chlorine gas into the clean water tank through a pipeline, wherein the contact time is 30-60 min.
The further proposal is that before raw water enters the sieve plate flocculation device, powdered activated carbon is added at the upstream of a static mixer, the adding amount of the powdered activated carbon is 10mg/L-30mg/L, and the hydraulic retention time is 1 hour-3 hours.
In order to achieve another object of the present invention, the treatment of raw water by the further water treatment method provided by the present invention sequentially includes the following steps:
step one, raw water to which flocculant is added enters a sieve plate flocculation device, the adding amount of the flocculant is 10mg/L-30mg/L, the flocculation time is 15min-25min, and flocculated water enters a horizontal pipe sedimentation device;
step two, the water precipitation time of entering the horizontal pipe precipitation device is 10min-30min, and the turbidity of the effluent is less than or equal to 1NTU b ；
Step three, the precipitated water directly enters a catalytic ceramic membrane area, the catalytic ceramic membrane area is continuously aerated by a blower, ozone is released to the catalytic ceramic membrane area by an ozone dissolving device consisting of an ozone generator, a pressurized dissolved air tank and a releaser, and the effluent of the catalytic ceramic membrane area enters a carbon sand filter;
step four, absorbing small molecular organic matters in water entering a carbon sand filter tank, and physically intercepting scraps passing through an activated carbon filter material, wherein effluent of the carbon sand filter tank enters a clean water tank;
fifthly, sodium hypochlorite or chlorine is added into the clean water tank through a pipeline, and the contact time is 30-60 min.
In order to achieve another object of the present invention, another water treatment method provided by the present invention sequentially includes the steps of:
step one, raw water to which flocculant is added enters a sieve plate flocculation device, the adding amount of the flocculant is 10mg/L-30mg/L, the flocculation time is 15min-25min, and flocculated water enters a horizontal pipe sedimentation device;
step two, the water precipitation time of entering the horizontal pipe precipitation device is 10min-30min, and the turbidity of the effluent is less than or equal to 1NTU b ；
Step three, the precipitated water directly enters an ozone catalytic ceramic membrane pool formed by an ozone contact area and a catalytic ceramic membrane area, the catalytic ceramic membrane area is continuously aerated by a blower, ozone is released to the ozone contact area and/or the catalytic ceramic membrane area by an ozone dissolving device formed by an ozone generator, a pressurized dissolved air tank and a releaser, and the effluent water of the catalytic ceramic membrane area enters a carbon sand filter pool;
step four, absorbing small molecular organic matters in water entering a carbon sand filter tank, and physically intercepting scraps passing through an activated carbon filter material, wherein effluent of the carbon sand filter tank enters a clean water tank;
fifthly, sodium hypochlorite or chlorine is added into the clean water tank through a pipeline, and the contact time is 30-60 min.
Drawings
FIG. 1 is a schematic elevational view of a first embodiment of a water treatment apparatus according to the present invention;
FIG. 2 is an enlarged view of part of A of FIG. 1;
FIG. 3 is a section B-B of FIG. 2;
FIG. 4 is an enlarged view of part C of FIG. 3;
FIG. 5 is a schematic elevational view of a second embodiment of the water treatment apparatus of the present invention;
FIG. 6 is a schematic elevational view of a third embodiment of a water treatment apparatus according to the present invention;
FIG. 7 is a schematic elevational view of a fourth embodiment of a water treatment apparatus according to the present invention;
FIG. 8 is a schematic elevational view of a fifth embodiment of a water treatment apparatus according to the present invention;
FIG. 9 is a flow chart of a first embodiment of the water treatment method of the present invention;
FIG. 10 is a flow chart of a second embodiment of the water treatment method of the present invention;
FIG. 11 is a flow chart of a third embodiment of the water treatment method of the present invention;
FIG. 12 is a flow chart of a fourth embodiment of the water treatment method of the present invention;
FIG. 13 is a flow chart of a fifth embodiment of the water treatment method of the present invention.
Wherein: a raw water intake point 1; a static mixer 2; a screen plate flocculation device 3; a horizontal tube sedimentation device 4; the length L of the horizontal pipe sedimentation device in the water flow direction; a horizontal pipe unit 41; a swash plate 42; equivalent diameter D of the horizontal pipe unit; an ozone contact zone 5; a ceramic membrane region 6; catalytic ceramic membrane zone 6A; a valve 61; a water outlet pump 62; a flow meter 63; a carbon sand filter 7; a clean water tank 8; a powdered activated carbon feeder 9; a flocculant feeder 10; an ozone generator 11; a pressurized dissolved air tank 111; a first release 112; a second releaser 113; a valve 114; a blower 12; an air releaser 121; the dispenser 13 is sterilized.
The present invention will be described in detail with reference to the following examples and the accompanying drawings.
Detailed Description
First embodiment of short-flow high-quality Water treatment device
Referring to fig. 1, fig. 1 is a schematic structural elevation view of a first embodiment of a short-process high-quality water treatment device according to the present invention, wherein the arrangement sequence of each apparatus in the water flow direction is as follows, a raw water intake point 1 is sequentially connected with a sieve plate flocculation device 3 and a horizontal pipe sedimentation device 4 through a pipeline via a static mixer 2, the sieve plate flocculation device 3 and the horizontal pipe sedimentation device 4 are arranged in the same water tank, water discharged from the horizontal pipe sedimentation device 4 directly enters a ceramic membrane area 6 through pipeline connection, a ceramic membrane area 6 formed by a plurality of ceramic membranes is arranged in the ceramic membrane tank, and water discharged from the ceramic membrane area 6 enters a clean water tank 8 through a pipeline via a valve 61, a water discharge pump 62 and a flowmeter.
A static mixer 2 is communicated with a pipeline between the upstream of the sieve plate flocculation device 3 and the raw water taking point 1, and a flocculant feeder 10 feeds flocculant into the static mixer 2 through the pipeline.
The air blower 12 is used for aerating the ceramic membrane area 6, and aerating through an air releaser 121 arranged at the bottom of the ceramic membrane area 6 in a pipe network state to physically wash the ceramic membrane, so that the ceramic membrane can maintain a relatively high membrane flux.
The disinfection dispenser 13 dispenses sodium hypochlorite or chlorine gas into the pipeline entering the clean water tank 8 through the pipeline.
Referring to fig. 2, fig. 2 is a partially enlarged view of a of fig. 1, and the horizontal tube settling device 4 has a substantially rectangular parallelepiped-shaped outer contour having a length L in the water flow direction, i.e., in the left-to-right direction of fig. 2.
Referring to fig. 3 and 4, fig. 3 is a sectional view of B-B of fig. 2, fig. 4 is a partial enlarged view of C of fig. 3, the horizontal pipe sedimentation device 4 has the same cross section in the L direction, and it can be seen from fig. 2 that there are a plurality of substantially prismatic horizontal pipe units 41 each enclosed by four inclined plates 42, the plate thickness of the inclined plates 42 is shown in a thick effect in fig. 4, the area of the prismatic is the water passing area of the horizontal pipe units 41 in the water flow direction, and when the water passing area of the prismatic is the same as a circular water passing area, the diameter of the circle is referred to as the equivalent diameter D of the prismatic.
In this example and all the following embodiments of the short-flow high-quality water treatment apparatus according to the present invention, the aspect ratio a of the horizontal tube precipitation apparatus 4 satisfies a condition of 50 or more, and the length L of the horizontal tube precipitation apparatus is appropriately selected based on this condition, specifically as follows:
the turbidity of the raw water entering the raw water intake point 1 is generally less than or equal to 100NTU b In the above step, repeated actual measurement shows that the turbidity of the effluent of the horizontal tube precipitation device 4 is less than or equal to 1NTU as long as the length-diameter ratio A of the horizontal tube precipitation device 4 is more than or equal to 50, namely, the L/D is more than or equal to 50 b 。
a=l/D; l=a x D, where L and D are in mm;
therefore, when the length L of the horizontal tube sedimentation device 4 is set, the length L can be obtained by conversion from the equation of the aspect ratio a.
The equivalent diameter D commonly used for the horizontal tube precipitation device 4 at present has two specifications, one is equivalent diameter d=40 mm, the other is equivalent diameter d=30 mm, if the equivalent diameter d=40 mm specification is adopted, the length L of the horizontal tube precipitation device 4 only needs to be equal to or longer than 2 meters, and if the equivalent diameter d=30 mm specification is adopted, the length L needs to be equal to or longer than 1.5 meters.
When the turbidity of the raw water entering the raw water intake point 1 is more than 100NTU b When the effluent turbidity of the horizontal pipe sedimentation device 4 is less than or equal to 1NTU by properly increasing the length L of the horizontal pipe sedimentation device 4 b The specific value of the length L can be determined simply through experiments, and can be solved by arranging a plurality of horizontal pipe sedimentation devices 4 in parallel in the sedimentation tank in the horizontal direction, and the mode of parallel arrangement is preferred as long as the uniform water distribution of the section can be satisfied.
The example focuses on the treatment of particulate matters in raw water, and is suitable for the purification treatment of conventional raw water which is not polluted by organic pollutants, wherein the suspended matter removal rate of a horizontal pipe precipitation device is more than 98%.
Second embodiment of short-flow high-quality Water treatment device
Only the differences between the present embodiment and the first embodiment of the short-range high-quality water treatment device will be described below, and the details of the differences will not be repeated.
Referring to fig. 5, the powder activated carbon adding device 9 is additionally arranged in the embodiment, and the powder activated carbon adding is performed at the raw water taking point 1, so that the advantage is that small molecular organic matters can be removed through the powder activated carbon.
The difference between the raw water used in this example and the raw water used in the above example is that the removal of dimethyl isoborneol is also focused on, and the raw water is suitable for micro-polluted raw water of which the concentration of dimethyl isoborneol is less than or equal to 0.00002 mg/L.
Third embodiment of short-flow high-quality Water treatment device
Only the differences between the present embodiment and the first embodiment of the short-range high-quality water treatment device will be described below, and the details of the differences will not be repeated.
Referring to fig. 6, the present example replaces the ceramic membrane in the first embodiment of the short-path high-quality water treatment apparatus with a catalytic ceramic membrane in a ceramic membrane tank, i.e., replaces the ceramic membrane zone 6 in the first embodiment of the short-path high-quality water treatment apparatus with a catalytic ceramic membrane zone 6A. An ozone contact zone 5 is added in the ceramic membrane pool upstream of the catalytic ceramic membrane zone 6A. An ozone dissolving device consisting of an ozone generator 11, a pressurized dissolved air tank 111, a first releaser 112, a second releaser 113 and a valve 114 is additionally arranged, an outlet of the ozone generator 11 is communicated with an inlet of the pressurized dissolved air tank 111 through a pipeline, an outlet of the pressurized dissolved air tank 111 is connected with the first releaser 112 arranged in the ozone contact zone 5 through a pipeline, and an outlet of the pressurized dissolved air tank 111 is also connected with the second releaser 113 arranged in the catalytic ceramic membrane zone 6A through a pipeline. A carbon sand filter 7 is additionally arranged between the catalytic ceramic membrane zone 6A and the clean water tank 8.
Compared with the prior art, the method has the advantages that ozone is added through the ozone dissolving device, high-concentration ozone dissolved air water is formed in the ozone contact area 5, the ozone dissolved air water is fully mixed with water to be treated entering the ozone contact area 5, the mixed water enters the catalytic ceramic membrane area 6A, ozone reacts with a catalyst attached to the catalytic ceramic membrane to generate hydroxyl free radicals, and under the strong oxidation action of the hydroxyl free radicals, dimethyl isoborneol in a polluted water source is oxidized, broken in chain, opened and gradually degraded to generateSmall molecular organic matter, finally mineralized into CO 2 And H 2 O. The gas dissolving efficiency is up to 90-95%, which is greatly higher than the 28% efficiency of the conventional jet device and aerator, and can also effectively avoid the blockage of the conventional aerator, greatly improve the utilization rate of ozone and reduce the ozone adding amount. Through the combined arrangement of the physical scouring of air aeration and the in-situ oxidation cleaning of ozone dissolved gas, the excessive addition of ozone can be avoided, the use amount of ozone is greatly reduced, and the running cost of a water plant is reduced. The proper amount of ozone is added, so that a large amount of organic matters are prevented from being oxidized into small molecules to permeate the ceramic membrane, and the service cycle of the activated carbon in the carbon sand filter tank 7 is prolonged.
The valve 114 is operative to allow the second releaser to intermittently release ozone-dissolved water to the catalytic ceramic membrane zone 6A, for example once every 24 hours, to provide a relative saving in ozone cost.
The method is suitable for the severely polluted raw water with the concentration of dimethyl isoborneol more than 0.00002 mg/L.
Fourth embodiment of short-flow high-quality Water treatment device
Only the differences between the present embodiment and the third embodiment of the short-process high-quality water treatment device will be described below, and the details of the differences will not be repeated.
Referring to fig. 7, the present example eliminates the piping, valve 114 and second releaser 113 for supplying ozone-dissolved gas water to the catalytic ceramic membrane zone 6A.
The method is suitable for slightly polluted raw water with the concentration of dimethyl isoborneol more than 0.00002 mg/L.
Fifth embodiment of short-flow high-quality Water treatment device
Only the differences between the present embodiment and the third embodiment of the short-process high-quality water treatment device will be described below, and the details of the differences will not be repeated.
Referring to fig. 8, the present example eliminates the ozone contact zone 5 and also eliminates the piping for supplying ozone-dissolved water to the ozone contact zone 5 and the first releaser 112.
The method is also suitable for slightly polluted raw water with the concentration of dimethyl isoborneol more than 0.00002 mg/L.
First embodiment of Water treatment method
Referring to fig. 9, fig. 9 is a flowchart of a first embodiment of a water treatment method corresponding to the first embodiment of the short-flow high-quality water treatment apparatus. The sequence of steps for treating raw water into high quality water is as follows.
Static mixing: adding flocculant into raw water obtained from a raw water taking point and mixing the raw water with the flocculant through a static mixer, wherein the adding amount of the flocculant is 10mg/L-30mg/L;
and (3) a screen plate flocculation step: the static mixed water flows into a sieve plate flocculation device, and the flocculation time of the self-flocculant fed into the sieve plate flocculation device and flowing out of the sieve plate flocculation device is controlled to be 15-25 min;
horizontal tube precipitation step: the water flowing into the horizontal pipe sedimentation device from the sieve plate flocculation device is sedimentated for 10min-30min, so that the turbidity of the discharged water is less than or equal to 1NTU b ；
Ceramic membrane decontamination step: directly feeding the precipitated water into a ceramic membrane area with the aperture of 10-100 nm, and continuously aerating the ceramic membrane area by a blower to ensure that the turbidity of the discharged water is less than or equal to 0.1NTU b ；
Conventional disinfection steps: sodium hypochlorite or chlorine gas is added into the clean water pool through a pipeline to disinfect the effluent of the ceramic membrane area, wherein the contact time for disinfection is 30-60 min.
It will be appreciated that sodium hypochlorite or chlorine may also be added directly to the clean water tank during the conventional disinfection step.
Second embodiment of Water treatment method
Referring to fig. 10, fig. 10 is a flowchart of a second embodiment of a water treatment method corresponding to the second embodiment of the short-flow high-quality water treatment apparatus. The method for treating raw water into high-quality water in this example is different from the first embodiment of the water treatment method described above in that: adding powdered activated carbon into raw water taking points, wherein the adding amount of the powdered activated carbon is 10mg/L-30mg/L, and the hydraulic retention time is 1 hour-3 hours. Obviously, if the raw water intake point is too far away, the powder activated carbon adding point should be set near the water treatment site in the case that the screen plate flocculation device flowing from the raw water intake point to the water treatment site needs more than 3 hours.
Third embodiment of Water treatment method
Referring to fig. 11, fig. 11 is a flow chart of a third embodiment of a water treatment method corresponding to the third embodiment of the short-flow high-quality water treatment apparatus.
The treatment method of this example differs from the first embodiment of the water treatment method described above in that:
the ceramic membrane decontamination step is replaced by a catalytic ceramic membrane decontamination step, an ozone contact step is added before the catalytic ceramic membrane decontamination step, and a carbon sand filtration step is added after the ceramic decontamination step. Wherein the ozone dissolving device composed of an ozone generator, a pressurized dissolved air tank and a releaser releases ozone to the ozone contact area and the catalytic ceramic membrane area, and the effluent of the catalytic ceramic membrane area enters the carbon sand filter.
The advantage of this example is that the effective turbidity removal of the horizontal tube sedimentation tank reaches 98% and the algae removal reaches 92%. Ozone dissolved gas water is fully mixed with water to be treated entering an ozone contact unit, the mixed water enters a catalytic ceramic membrane area, ozone reacts with a catalyst attached to the catalytic ceramic membrane to generate hydroxyl free radicals, under the strong oxidation action of the hydroxyl free radicals, dimethyl isoborneol in the water to be treated is oxidized, broken in a chain, opened and gradually degraded to generate micromolecular organic matters, and finally mineralized to CO 2 And H 2 O。
Fourth embodiment of Water treatment method
Referring to fig. 12, fig. 12 is a flowchart of a fourth embodiment of a water treatment method corresponding to the fourth embodiment of the short-flow high-quality water treatment apparatus.
The treatment method of this example is different from the aforementioned third embodiment of the water treatment method in that:
the step of releasing ozone into the catalytic ceramic membrane zone is eliminated.
Fifth embodiment of Water treatment method
Referring to fig. 13, fig. 13 is a flowchart of a fifth embodiment of a water treatment method corresponding to the fifth embodiment of the short-flow high-quality water treatment apparatus.
The treatment method of this example is different from the aforementioned third embodiment of the water treatment method in that:
the step of releasing ozone into the ozone contact area is eliminated.
Claims (10)
1. The short-flow high-quality water treatment device comprises a sieve plate flocculation device, a precipitation device, a ceramic membrane area and a clean water tank which are sequentially communicated according to the water flow direction;
the method is characterized in that:
the sedimentation device is a horizontal pipe sedimentation device, and effluent of the horizontal pipe sedimentation device directly enters the ceramic membrane area through a pipeline.
2. The short-flow high-quality water treatment apparatus according to claim 1, wherein:
the length-diameter ratio A of the horizontal tube precipitation device is more than or equal to 50;
namely A=L/D is more than or equal to 50, wherein L is the length of the horizontal pipe sedimentation device in the water flow direction, and the unit is millimeter; d is the equivalent diameter of the horizontal tube unit in millimeters.
3. The short-flow high-quality water treatment apparatus according to claim 1 or 2, wherein:
a static mixer is communicated with an upstream pipeline of the sieve plate flocculation device;
the powder activated carbon feeder is connected with the static mixer or the raw water taking point through a pipeline.
4. The short-flow high-quality water treatment device comprises a sieve plate flocculation device, a precipitation device, a catalytic ceramic membrane area and a clean water tank which are sequentially communicated according to the water flow direction;
the method is characterized in that:
the sedimentation device is a horizontal pipe sedimentation device, and effluent of the horizontal pipe sedimentation device directly enters the catalytic ceramic membrane area through a pipeline;
the ozone dissolving device comprises an ozone generator, a pressurized dissolved air tank and a second releaser, wherein the outlet of the ozone generator is communicated with the inlet of the pressurized dissolved air tank through a pipeline, the outlet of the pressurized dissolved air tank is connected with the second releaser through a pipeline, and the second releaser is arranged in the catalytic ceramic membrane zone;
and a carbon sand filter is also arranged between the catalytic ceramic membrane area and the clean water tank.
5. The short-flow high-quality water treatment device comprises a sieve plate flocculation device, a precipitation device, an ozone contact area, a catalytic ceramic membrane area and a clean water tank which are sequentially communicated according to the water flow direction;
the method is characterized in that:
the sedimentation device is a horizontal pipe sedimentation device, and effluent of the horizontal pipe sedimentation device directly enters the ozone contact area through a pipeline, and the ozone contact area and the catalytic ceramic membrane area are arranged in the same pool and are adjacently arranged;
the ozone dissolving device comprises an ozone generator, a pressurized dissolved air tank and a first releaser, wherein the outlet of the ozone generator is communicated with the inlet of the pressurized dissolved air tank through a pipeline, the outlet of the pressurized dissolved air tank is connected with the first releaser through a pipeline, and the first releaser is arranged in the ozone contact area;
and a carbon sand filter is also arranged between the catalytic ceramic membrane area and the clean water tank.
6. The short-flow high-quality water treatment apparatus according to claim 5, wherein:
the outlet of the pressurized dissolved air tank is also connected with a second releaser through a pipeline, and the second releaser is arranged in the catalytic ceramic membrane area.
7. The water treatment method sequentially comprises the following steps of:
step one, raw water to which flocculant is added enters a sieve plate flocculation device, the adding amount of the flocculant is 10mg/L-30mg/L, the flocculation time is 15min-25min, and flocculated water enters a horizontal pipe sedimentation device;
step two, the water precipitation time of entering the horizontal pipe precipitation device is 10min-30min, and the turbidity of the effluent is less than or equal to 1NTU b ；
Step three, the precipitated water directly enters a ceramic membrane area with the aperture of 10nm-100nm, the ceramic membrane area is continuously aerated by a blower, and the effluent of the ceramic membrane area enters a clean water tank;
and fourthly, adding sodium hypochlorite or chlorine gas into the clean water tank through a pipeline, wherein the contact time is 30-60 min.
8. The water treatment method according to claim 7, wherein:
before raw water enters the sieve plate flocculation device, powdered activated carbon is added to the upstream of the static mixer, wherein the adding amount of the powdered activated carbon is 10mg/L-30mg/L, and the hydraulic retention time is 1 hour-3 hours.
9. The water treatment method sequentially comprises the following steps of:
step one, raw water to which flocculant is added enters a sieve plate flocculation device, the adding amount of the flocculant is 10mg/L-30mg/L, the flocculation time is 15min-25min, and flocculated water enters a horizontal pipe sedimentation device;
step two, the water precipitation time of entering the horizontal pipe precipitation device is 10min-30min, and the turbidity of the effluent is less than or equal to 1NTU b ；
Step three, the precipitated water directly enters a catalytic ceramic membrane area, the catalytic ceramic membrane area is continuously aerated by a blower, ozone is released to the catalytic ceramic membrane area by an ozone dissolving device consisting of an ozone generator, a pressurized dissolved air tank and a releaser, and the effluent of the catalytic ceramic membrane area enters a carbon sand filter;
step four, absorbing small molecular organic matters in water entering a carbon sand filter tank, and physically intercepting scraps passing through an activated carbon filter material, wherein effluent of the carbon sand filter tank enters a clean water tank;
fifthly, sodium hypochlorite or chlorine is added into the clean water tank through a pipeline, and the contact time is 30-60 min.
10. The water treatment method sequentially comprises the following steps of:
step one, raw water to which flocculant is added enters a sieve plate flocculation device, the adding amount of the flocculant is 10mg/L-30mg/L, the flocculation time is 15min-25min, and flocculated water enters a horizontal pipe sedimentation device;
step two, the water precipitation time of entering the horizontal pipe precipitation device is 10min-30min, and the turbidity of the effluent is less than or equal to 1NTU b ；
Step three, the precipitated water directly enters an ozone catalytic ceramic membrane pool formed by an ozone contact area and a catalytic ceramic membrane area, the catalytic ceramic membrane area is continuously aerated by a blower, ozone is released to the ozone contact area and/or the catalytic ceramic membrane area by an ozone dissolving device formed by an ozone generator, a pressurized dissolved air tank and a releaser, and the effluent water of the catalytic ceramic membrane area enters a carbon sand filter pool;
step four, absorbing small molecular organic matters in water entering a carbon sand filter tank, and physically intercepting scraps passing through an activated carbon filter material, wherein effluent of the carbon sand filter tank enters a clean water tank;
fifthly, sodium hypochlorite or chlorine is added into the clean water tank through a pipeline, and the contact time is 30-60 min.
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