CN109678282A - A kind of groundwater treatment technique and device for not only going hardness but also drop basicity - Google Patents
A kind of groundwater treatment technique and device for not only going hardness but also drop basicity Download PDFInfo
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- CN109678282A CN109678282A CN201811492945.4A CN201811492945A CN109678282A CN 109678282 A CN109678282 A CN 109678282A CN 201811492945 A CN201811492945 A CN 201811492945A CN 109678282 A CN109678282 A CN 109678282A
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- 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
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- 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
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- 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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
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- 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
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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Abstract
The present invention proposes a kind of groundwater treatment technique and device for not only going hardness but also drop basicity, it is characterized in that, including obtaining pending water through cation exchange containing hydrionic water, into pending water, acid adding obtains the water containing acid, hydrionic water is remixed with the water containing acid, and common reaction, which generates, contains CO2The water of gas, then to containing CO2The water of gas carries out aeration stripping；The acid is hydrochloric acid, and the amount S of hydrochloric acid is added in every liter of pending water2It indicates, S2Unit be μm ol/L, S2=23.33 × B × C-S1, wherein B indicates the temporary hardness of pending water, and unit mg/L, C indicate the concentration of hydrochloric acid, unit mol/L, S1Indicate that the amount for the acid that every liter of pending water is swapped out after ion exchange, unit are μm ol/L.Aerator of the invention, aeration sufficiently, maintain to remove scale removal in the case where needed by human body hardness, reduce hardness, pH value maintains 7 or so.
Description
Technical field
The invention belongs to water-treatment technology fields, are related to groundwater treatment, and in particular to one kind not only goes hardness but also drops basicity
Groundwater treatment technique and device.
Background technique
Underground water is the important and good drinking water source of China resident.And the generally existing hardness in such water source and temporarily hard
Spend (scale) high problem.Scale is to be formed during boiling water by temporary hardness, i.e. carbonate hardness, is total hardness
A part is equivalent to and is formed by hardness with heavy carbonate in water and the calcium in conjunction with a small amount of carbonate, magnesium, when boiling boiling, calcium,
The heavy carbonate of magnesium decomposes the hardness for generating precipitating to reduce water, and part hardness can be removed with the method boiled.If
Calcium and magnesium mainly exist in the form of sulfate, nitrate and chloride etc. in hard water, as permanent hardness.
Scale leads to the aesthetic difference of drinking water more, and to resident living and health, there are potential impacts.Although China
The total hardness of regulation water must not exceed 450mg/L in " standards for drinking water quality ", but there is no limit regulations to temporary hardness.
To the higher groundwater supply system of temporary hardness, due to existing HCO a large amount of in underground water3 -Ion goes out in water after boiled
Now a large amount of precipitatings and floating material, cause turbidity to increase, part water turbidity is more than 7NTU, this and Drinking Water in China are about turbidity and not
There must be visible regulation contradiction.China's " standards for drinking water quality " is in reference WHO and western developed country relevant criterion
And formulate, it formulates according to being to drink unboiled water, and often differ greatly to boil water to drink with China resident, the former mainly drinks
The calcium and magnesium ion of dissolution, what China resident drank is that part ion is converted into calcium carbonate, and long-term drinking high carbon acid calcium water is to normal
Shadow sound is unknown.Hard water is drunk once in a while, it is it will cause functions of intestines and stomach disorder, i.e., so-called " not acclimatized "；It is done washing with hard water, fertilizer
Soap foams less, causes to waste；It is cooked and is cooked with hard water, be not easy to be cooked；It is washed hair with hard water, hair can be made to cohere, embrittlement etc..
At present processing high hardness water, go the technology of scale removal mainly have lime softening method, film tenderizer, ion-exchange and
Acid-base balance aeration.Lime softening method can fundamentally reduce total hardness, but can generate a large amount of body refuses, complex treatment process.
Power consumption is larger in film tenderizer operational process, and water producing cost is higher, and to mitigate the dirt that membrane material is subject in main process
Dye, needs relatively complicated preprocessing process.Traditional Na type ion-exchange process can replace the calcium and magnesium ion in whole water
Out, sodium ion is introduced into water, using more in treatment of industrial water, H-type ion-exchanger is by hydrogen ion by water
The cation replacements such as middle calcium and magnesium come out, but are discharged pH value reduction, and need to be adjusted again with alkali makes pH reach requirement.Acid-base balance aeration
Method is directed to add the antisludging agent based on strong acid in water, converts carbon dioxide for the bicarbonate radical for generating scale in water, passes through
Aeration stripping carbon dioxide restores pH, can effectively remove scale, but do not reduce total hardness, and can be introduced into water it is a large amount of negative from
Son may influence drinking water mouthfeel.
It is the underground water that 400~550mg/L, basicity are more than 200~350mg/L for total hardness, scale of heating up water is more, for a long time
Adverse effect can be generated to human body by drinking.Lime softening method complex process is taken, and there are also residual harness for treated water, still
It will form scale problems, furthermore generate a large amount of body refuse；Power consumption is larger in film tenderizer operational process, water producing cost compared with
It is high；Conventional ion exchanges tenderizer complex process equipment, needs to consume a large amount of acid or salt is cooked regenerative agent, the cost is relatively high；
Though acid-base balance aeration can remove scale removal well, it is difficult to solve the problems, such as that total hardness is exceeded and introduces a large amount of anion.And
Such quality problem can not fundamentally be solved by being based only on treatment process designed by acid-base balance aeration or equipment, be passed through
Dosing combination mechanical stirring and aeration can only handle the temporary hardness problem in water source, can not drop the total hardness at such water source
It is low.
Summary of the invention
In view of the deficiencies of the prior art, hardness had not only been gone the object of the present invention is to provide one kind but also drop the underground water of basicity
Treatment process and device, solve the problems, such as to drink that the water hardness and basicity are high, drinking water fouling is serious at present.
In order to solve the above-mentioned technical problem, the present invention is realised by adopting the following technical scheme:
A kind of groundwater treatment technique for not only going hardness but also drop basicity, including pending water is contained through cation exchange
Hydrionic water, into pending water, acid adding obtains the water containing acid, and hydrionic water is remixed with the water containing acid, and common reaction produces
Life contains CO2The water of gas, then to containing CO2The water of gas carries out aeration stripping；
The acid is hydrochloric acid, and the amount S of hydrochloric acid is added in every liter of pending water2It indicates, S2Unit be μm ol/L,
S2=23.33 × B × C-S1
Wherein, the temporary hardness of B expression pending water, the concentration of unit mg/L, C expression hydrochloric acid, unit mol/L,
S1Indicate that the amount for the acid that every liter of pending water is swapped out after ion exchange, unit are μm ol/L.
Specifically, pending water total hardness be 400~550mg/L, pending water basicity be 200~350mg/L, every liter to
The amount S for the acid that processing water is swapped out after ion exchange1For 0~5mmol/L, the amount S of hydrochloric acid is added in every liter of pending water2It is 0
~6mmol/L, aeration stripping time are 25~40min.
A kind of underground water treating device, the device implement the groundwater treatment of the present invention for not only going hardness but also drop basicity
Technique.
Further, including the pretreatment unit and aeration stripping unit that set gradually, the pretreatment unit includes
Ion-exchange area (1) and acid adjust reaction zone (2), and the aeration stripping unit includes aeration stripping area (3)；
Pending water is obtained through ion-exchange area (1) containing hydrionic water, and pending water flows through acid and adjusts reaction zone (2) processing
The water containing acid is obtained, adjusts reaction zone (2) to react in acid jointly with the water containing acid containing hydrionic water, generation contains CO2Gas
Water, described contains CO2The water of gas carries out aeration stripping through aeration stripping area (3).
Specifically, the ion-exchange area (1) setting ion-exchanger (1-2), the ion-exchanger (1-2) number
Amount is two sets；The acid adjusts reaction zone (2) setting mixer (2-4).
Specifically, the aeration stripping area (3) includes the inhalant region set gradually, stripping area, water catchment area and exhalant region,
Water inlet (3-1) is arranged in the inhalant region, and water outlet (3-10) is arranged in the exhalant region, the water inlet (3-1) away from
The height of bottom of device is greater than the height of water outlet (3-10) away from bottom of device.
Specifically, the stripping area is equipped with mutually perpendicular first partition wall (3-2) of twice and the second partition wall (3-4), the
Two partition walls (3-4) are arranged on the central axes of the first partition wall (3-2), and the bottom of the first partition wall (3-2) is at a distance from bottom of device
For 0.1~0.2m.
Further, aerator is arranged in the bottom in the stripping area, and the aerator includes vent stack (3-
3), vent branch and aeration tube (3-7), wherein wall of the vent stack (3-3) along the first partition wall (3-2) and the second partition wall (3-4)
Face setting, vent branch include the first vent branch (3-5) and the second vent branch (3-6), the first vent branch (3-
5) with vent stack (3-3) is orthogonal is connected to bottom of device, and be extended along the width direction of aeration stripping area (3),
Second vent branch (3-6) is arranged on the first vent branch (3-5) of bottom of device, sets on the second vent branch (3-6)
It sets multiple aeration tubes (3-7), the shape in the aeration face of the aeration tube (3-7) is shape wide at the top and narrow at the bottom.
Further, the first stripping that the vertical plane where first vent branch of stripping area (3-5) separates
Area (A) and the second stripping area (B), the first stripping area (A) are connected to second bottom stripping area (B).
Further, it is 1~3min that the pending water, which enters to the hydraulic detention time between the first partition wall (3-2),
It is 25~40min that pending water, which enters the hydraulic detention time in stripping area,.
Compared with prior art, the present invention having the following technical effect that
(1) present invention can carry out economical during handling high rigidity, high alkalinity raw water according to the water quality situation of raw water
Property adjust, compared with prior art, technological operation is simple, convenient for management, programmable, and operating cost is lower than other mesh
Mark treatment process.
(2) narrow wide feature under the shape setting of aeration tank of the invention is in, can increase bubble in stripping uphill process
Disturbance between middle bubble and bubble, while it can be further reduced bubble formation recycle stream, so that more CO2Gas is dissolved in gas
In bubble, the effect of aeration stripping is improved.
(3) aerator of the invention is divided into the first stripping area A and the second stripping area B, and water flow is in the first stripping area A
CO2Concentration is relatively high, and the first stripping area A compares single aeration zone, and length-width ratio increases, and is more advantageous to the aeration disturbance of water body,
Aeration effect is excellent；Most CO in water flow in second stripping area B2Stripping removes gas, does not need higher stripping efficiency,
Remaining part CO in water flow2Gas thoroughly deviates from CO in water body by the second stripping area B2It is strong to guarantee that water outlet meets human body for gas
Kang Yaoqiu standard.The more existing aerator of the device of the invention saves capital construction cost, and aeration effect is abundant.
(4) present invention can quantitatively control the hardness of water, and pending water goes to the portion in water removal by the effect of ion-exchanger
Divide calcium ions and magnesium ions, the sour collective effect with addition, the flow control by controlling water inlet pipe reduces the degree of hardness, to guarantee
The ion concentration beneficial to human body such as suitable calcium ions and magnesium ions in water.
Detailed description of the invention
Fig. 1 is the groundwater treatment technique top view for not only going hardness but also drop basicity of the invention；
Fig. 2 is that the present invention not only goes hardness but also drops the groundwater treatment process flow diagram of basicity, the solid arrow in figure
Indicate water (flow) direction, dotted arrow indicates airflow direction in figure；
Fig. 3 not only goes hardness to realize the present invention but also drops the aerator 1-1 in the device of the groundwater treatment technique of basicity
Sectional view；
Fig. 4 is that the present invention not only goes hardness but also drops bubble stream simulation drawing in the groundwater treatment technical process of basicity；
Label in figure respectively indicates: the ion-exchange area 1-, the first water inlet pipe of 1-1,1-2 ion-exchanger, 2- acid tune are anti-
Answer area, the second water inlet pipe of 2-1,2-2 dosing pump, 2-3 dosing tank, 2-4 mixer, 3- aeration stripping area, 3-1 water inlet, 3-2
One partition wall, 3-3 vent stack, the second partition wall of 3-4, the first vent branch of 3-5, the second vent branch of 3-6,3-7 aeration tube, 3-8
Finger-type weir, 3-9 blow-down pipe, 3-10 water outlet, 3-11 connecting tube, the first stripping of A- area, the second stripping of B- area.
The present invention is illustrated below in conjunction with specification drawings and specific embodiments.
Specific embodiment
Specific embodiments of the present invention are given below, it should be noted that the invention is not limited to implement in detail below
Example, all equivalent transformations made on the basis of the technical solutions of the present application each fall within protection scope of the present invention.
The groundwater treatment technique for not only going hardness but also drop basicity of the invention, including pending water is successively handed over through cation
It changes and sour hybrid reaction, generates a large amount of CO after reaction in water2Gas, by aeration to the CO in water2Stripping is carried out to be handled
Water afterwards；The equipment that cation exchange uses is to add hydrogen shape ion exchange resin, and the amount of hydrochloric acid is added in every liter of pending water
Use S2It indicates, S2Unit be μm ol/L, S2Calculation formula it is as follows:
S2=Sv-S1
Sv=23.33 × B × C
S1=2EG×1000
In formula: SvIndicate total acid content needed for reducing pending water temporary hardness, unit is μm ol/L；
S1Indicate that the amount for the acid that every liter of pending water is swapped out after ion exchange, unit are μm ol/L；
The temporary hardness of B expression pending water；
C indicates the concentration of hydrochloric acid, unit mol/L；
EGIndicate the exchange capacity of ion exchange resin；
CIntoIndicate the ion (Ca of pending water water inlet Shi Shuizhong2+And Mg2+) concentration, unit mmol/L；
COutIndicate the ion (Ca of pending water water outlet Shi Shuizhong2+And Mg2+) concentration, unit mmol/L；
VWaterIndicate that ion exchange resin enters total water production of ion exchange, unit m for pending water3；
VResinIndicate the volume of ion exchange resin, unit m3。
The pending water total hardness that the present invention is directed to is 400~550mg/L, and pending water basicity is 200~350mg/L,
The amount S for the acid that every liter of pending water is swapped out after ion exchange1For 0~5mmol/L, hydrochloric acid is added in every liter of pending water
Measure S2For 0~6mmol/L, the aeration stripping time is 25~40min.
Not only hardness had been gone in the present invention but also has dropped the device of the groundwater treatment technique of basicity, including the pretreatment list set gradually
Member and aeration stripping unit, pretreatment unit includes ion-exchange area 1 and acid adjusts reaction zone 2, and aeration stripping unit includes aeration
Stripping area 3；Pending water flows through the Ca in the processing of ion-exchange area 1 removal pending water2+And Mg2+Ion is obtained containing H+Water,
The H displaced through ion-exchange area+With the water containing acid is obtained after pending water acid adding, containing hydrionic water with it is common containing sour water
Reaction zone 2 is adjusted to react in acid, generation contains CO2The water of gas, aeration stripping area 3 is by aeration to the CO in water2Carry out stripping.
Ion-exchange area 1 obtains after entering the hardness of ion-exchanger 1-2 reduction partial raw water including underground water to be processed
To containing H+Water；It includes that the water containing acid obtained after a certain amount of acid is added into pending water that acid, which adjusts reaction zone 2, containing hydrionic
Water adjusts hybrid reaction in 2 mixer 2-4 of reaction zone in acid jointly with the water containing acid, and generation contains CO2The water of gas；Aeration stripping
Area 3 is that pending water is generated a large amount of CO after acid adjusts reaction zone 2 to react2Gas carries out stripping by aeration.
Embodiment 1:
In compliance with the above technical solution, in conjunction with Fig. 1-Fig. 3, the present embodiment provides a kind of underground water for not only going hardness but also drop basicity
Treatment process, mainly for the relatively high water of total hardness and temporary hardness, wherein pending water total hardness is 400~550mg/
L, basicity are 200~350mg/L, contain Ca in such water2+、Mg2+、HCO3 -Characteristic, by pending water a part pass through first
Water inlet pipe 1-1 enters ion-exchanger 1-2, and ion-exchanger 1-2 is form ion exchanger (including RH type resin), quantity
It is two sets, is used alternatingly, a set of regeneration, a set of operation, the Ca in water2+、Mg2+Go out H by RH type resin substitution+, go in water removal
Ca2+、Mg2+Equal cations, the calcium ions and magnesium ions concentration in water reduce, at this time pending water through ion-exchanger 1-2 obtain it is hydrogeneous from
The water of son.Another part pending water is entered by the second water inlet pipe 2-1 simultaneously, and acid adjusts the dosing tank 2-3 of reaction zone to be added
Strong acid (based on hydrochloric acid), dosing pump 2-2 control the hydrochloric acid additional amount in dosing tank 2-3, and pending water is through the second water inlet pipe 2-1
With the water containing acid is obtained after dosing, then be co-flowed into mixer 2-4 containing hydrionic water, containing hydrionic water with containing acid
Water volume ratio be 1:6.Containing the H in hydrionic water+With the H in the water containing acid+In effect and water by mixer 2-4
HCO3 -Reach and be sufficiently mixed and occur to react as follows: HCO3 -+H+=H2O+CO2↑, a large amount of CO are generated in water2Gas, by aeration
The aerator in stripping area 3 passes through to the CO in water2Carry out stripping, the CO in water2It is diffused into air, it will not be introduced in water
His anion, will not generate waste residue, reduce the trouble of subsequent processing.If individually using the water outlet and one of form ion exchanger
The raw water of certainty ratio mixes, although scale and hardness can be reduced, total water producing cost is improved.Treatment method can be low
It is cost-effective to remove scale removal, and can guarantee that the pH value of final outflow water meets national drinking water relevant criterion.
Aeration stripping area 3 includes the inhalant region set gradually, stripping area, water catchment area, exhalant region, inhalant region setting water inlet
Water outlet 3-10 is arranged in 3-1, exhalant region, and height of the water inlet 3-1 away from bottom of device is greater than water outlet 3-10 away from bottom of device
Highly.Stripping area along 1-1 vertical profile section configuration be it is trapezoidal, in now narrow wide feature, according to Euler-Euler's bubble population mould
Type, in bubble ascending path and non-rectilinear, therefore be arranged partition wall and under narrow wide form, increase and disturb between bubble, while can be into one
Step reduces bubble formation recycle stream, so that more CO2Gas is dissolved in bubble, improves the effect of aeration stripping.(specific bubble
Flow field simulation figure is shown in attached drawing 4)
Stripping area is equipped with the mutually perpendicular first partition wall 3-2 of twice and the second partition wall 3-4, and the second partition wall 3-4 setting is the
On the central axes of one partition wall 3-2, the first partition wall 3-2 is not contacted with the bottom of aeration tank, the bottom of distance means bottom (aeration tank)
0.1~0.2m of portion is preset for the structures for handling different waters, adjusts the first partition wall 3-2 away from bottom of device
Highly, it can control into the water flow of aeration zone to a certain extent, omit the trouble for using flow regulator.Second partition wall
3-4 plays the role of evenly distributing to uniform water distribution.
The bottom in stripping area is arranged aerator, and aerator includes vent stack 3-3, vent branch and aeration tube 3-7,
Wherein, vent stack 3-3 is connect with blower device, and vent stack 3-3 is set along the metope of the first partition wall 3-2 and the second partition wall 3-4
It sets, vent branch includes the first vent branch 3-5 and the second vent branch 3-6.First vent branch 3-5 and vent stack 3-3
Orthogonal connection extends to aeration bottom of pond portion, and the width direction along aeration stripping area 3 along the setting of the second two sides partition wall 3-4
It is extended.Furthermore aeration tank bottom be arranged connecting tube 3-11, connect the second vent branch 3-6, connecting tube 3-11 in order to
Guarantee that the first vent branch 3-5 normal ventilation works, if the first vent branch 3- of the second any side partition wall 3-4 is arranged in
5 work are not normal, and connecting tube 3-11 at this time can ventilate, and guarantee the normal operation of device.The quantity of second vent branch 3-6 is
It 2, is connect with the first vent branch 3-5 for extending to aeration tank two sides of the bottom, the specific length direction along aeration bottom of pond portion is set
It sets, multiple aeration tube 3-7 is set on the second vent branch 3-6, optionally, aeration tube 3-7 shape can be the aeration such as Y type, V-type
Face shape wide at the top and narrow at the bottom is machined with multiple apertures on the wall of aeration tube 3-7, and multiple aeration tube 3-7 are in setting arranged in parallel, erects
It is directly connected on the second vent branch 3-6, the aeration face of aeration tube 3-7 shape wide at the top and narrow at the bottom is provided with conducive to bubble along ladder
The aeration tank stripping of shape, stripping aeration time are controlled in 25min~40min.
Vertical plane where stripping area the first vent branch 3-5, which separates, is divided into 2 areas, respectively the first stripping area
A and the second stripping area B, the first stripping area A and the connection of the second stripping area bottom B.By mixer 2-4 processing water flow by into
Mouth of a river 3-1 enters, and is then pierced by by the first bottom partition wall 3-2 into the first stripping area A, under certain altitude difference, forms one
The effect of drop water aeration improves whole aeration efficiency.In stripping area, the CO in extraneous air blast stripping water flow is utilized2, first
Due to being separated out multiple aeration zones by multiple aeration tube 3-7 in stripping area A, the fresh air of bottom bulging is relatively more, compares
Single aeration zone, length-width ratio increase, and are more advantageous to the aeration disturbance of water body, and aeration effect is excellent；Water into the second stripping area B
The CO contained in stream2It measures less, does not need higher stripping efficiency, remaining part CO in water flow2Gas is blown by the area B aeration
It is de-, it will thoroughly deviate from CO in water body2Gas, the first stripping area A and the connection of the second stripping area bottom B carry out aeration stripping respectively,
Water flow after aeration stripping is pushed by air-flow, and flow direction aeration pool surface, is finally collected by finger-type weir 3-8, through converging after stripping
The catchment tray pipe water outlet 3-10 in pool is discharged.Pending water enters to the first partition wall 3- through water inlet 3-1 in inhalant region
Hydraulic detention time between 2 is 1~3min, the hydraulic detention time into stripping area space, i.e., in the first stripping area A and the
The total time of two stripping area B is 25~40min.Whole device bottom is also connected with blow-down pipe 3-9, for emptying in special circumstances
Water inside aeration tank.
Aerator of the invention can realize that water flow is intake along bottom, (bottom refers to the bottom of the first partition wall 3-2 for top water outlet
Portion, top point out that mouth of a river 3-10 is located at top relative to the bottom of the first partition wall 3-2), aeration sufficiently, maintains needed by human body hardness
In the case where remove scale removal, making that treated, water goes out 3/4 or so of total hardness of water total hardness, and pH value is between 6~7, entirely
Device collective effect, complements each other, and guarantees that water outlet meets human health and requires standard.
Embodiment 2:
The present embodiment is by taking the underground water of Jining City in Shandong Province somewhere as an example, preliminary identification device effect in laboratory, tool
Body experimental data index see the table below 1:
1 pending water of table turbidity after the laboratory simulation device treated hardness, total alkalinity and water boiling
Note: testing indoor preliminary experiment water flow and remain stationary, and exchange column simulates the form ion exchanger of actual motion,
Aeration stripping is replaced with artificial stirring.
The pH of the processing water behind ion-exchange area is 2.15 as seen from table, basicity 0, total hardness 22.8mg/L,
Turbidity after water boiling is 0.21NTU；The pH of processing water after acid adjusts reaction zone is 7.55, basicity 176mg/L, and total hardness is
421mg/L, the turbidity after water boiling are 4.23NTU；Processing water pH after whole mixing after aeration stripping is 7.18, and basicity is
126mg/L, total hardness 382mg/L, the turbidity after water boiling are 0.51NTU.Treated at this time, and total hardness of water decreases,
Total alkalinity is also decreased obviously.
Embodiment 3:
The present embodiment by taking the underground water of Shandong Province somewhere as an example, air that air blower blasts with dissolved with CO2The ratio of the water of gas
Example is 6:1, is verified to the effect of embodiment 1, and monitoring reactor goes out total hardness of water.
The technique described using the present invention, indices such as table 2:
2 pending water of table turbidity after the present apparatus treated hardness, total alkalinity and water boiling
Note: the concentration of concentrated acid is 12mol/L, and 1.3 ‰ acid is that concentrated acid is diluted to 1.3 ‰ times
For equipment on the spot in operational process, the water flow of the first water inlet pipe 1-1 is 0.14mg/L, the water of the second water inlet pipe 2-1
Flow is 0.59mg/L, is put into from the hydrochloric acid for extracting 1.3 ‰ in dosing tank 22 into the second water inlet pipe 2-1.By test of many times
For operation result it is found that when containing hydrionic water with being 1:6 containing sour water mixing ratio, the pH of water outlet maintains 6.81 left sides after stablizing
The right side, aeration front and back hardness are basically unchanged, and total hardness of water maintains 3/4 of raw water or so out, and water outlet is limpider after boiling, and does not precipitate
It is generated with floating material, while solving the basicity and stiffness issue of water, meet relevant criterion.
Comparative example 1:
This comparative example carries out water process, total inflow 0.73mg/L, wherein the first water inlet pipe only with ion-exchanger
1-1 water flow is 0.21mg/L, and the water flow of the second water inlet pipe 2-1 is 0.52mg/L (not using acids antisludging agent), aeration dress
The gas-water ratio set is 1:6, and the pH value of raw water is 7.35, and total hardness 530mg/L, basicity 320mg/L have scale after boiled, warp
Indices after processing are as follows: pH value 6.76, total hardness 350mg/L, basicity 121mg/L, boiled rear Non-scale.Though total hardness
It so can also reduce, but cost consumption is larger, i.e., not have universality to high hardness water.It is according to actual production ton cost of water treatment
0.8 yuan, and actual production ton cost of water treatment of the present invention is within 0.5 yuan.
Comparative example 2:
For this comparative example only with agent-feeding treatment, the first water inlet pipe 1-1 water flow is 0mg/L, the water flow of the second water inlet pipe 2-1
Amount is 0.73mg/L, is put into from the hydrochloric acid for extracting 5.1 ‰ in dosing tank 22 into the second water inlet pipe 2-1, the air water of aerator
Than being 7.35 for the pH value of 1:6, raw water, total hardness 530mg/L, basicity 320mg/L have scale, after processing after boiled
Indices are as follows: pH value 6.56, total hardness 530mg/L, basicity are Non-scale after 58mg/L is boiled.According to locating as the result is shown
Reason goes out total hardness of water variation less, is extremely difficult to the hardness number of national regulations, this kind of processing method is inherently just uncomfortable
With the processing of high rigidity high alkalinity water.
Claims (10)
1. one kind not only go hardness again drop basicity groundwater treatment technique, which is characterized in that including by pending water through cation
Exchange is obtained containing hydrionic water, and into pending water, acid adding obtains the water containing acid, and hydrionic water is remixed with the water containing acid,
Common reaction, which generates, contains CO2The water of gas, then to containing CO2The water of gas carries out aeration stripping；
The acid is hydrochloric acid, and the amount S of hydrochloric acid is added in every liter of pending water2It indicates, S2Unit be μm ol/L,
S2=23.33 × B × C-S1
Wherein, B indicates the temporary hardness of pending water, and unit mg/L, C indicate the concentration of hydrochloric acid, unit mol/L, S1It indicates
The amount for the acid that every liter of pending water is swapped out after ion exchange, unit are μm ol/L.
2. not only going hardness as described in claim 1 but also dropping the groundwater treatment technique of basicity, which is characterized in that pending water is total
Hardness is 400~550mg/L, and pending water basicity is 200~350mg/L, and every liter of pending water is swapped out after ion exchange
Acid amount S1For 0~5mmol/L, the amount S of hydrochloric acid is added in every liter of pending water2For 0~6mmol/L, the aeration stripping time is
25~40min.
3. a kind of underground water treating device, which is characterized in that the device implement as claimed in claim 1 or 22 described in not only go hardness but also drop
The groundwater treatment technique of basicity.
4. underground water treating device as claimed in claim 3, which is characterized in that including the pretreatment unit set gradually and exposure
Air-blowing takes off unit, and the pretreatment unit includes that ion-exchange area (1) and acid adjust reaction zone (2), the aeration stripping list
Member includes aeration stripping area (3)；
Pending water is obtained through ion-exchange area (1) containing hydrionic water, and pending water flows through acid and reaction zone (2) processing is adjusted to obtain
Water containing acid adjusts reaction zone (2) to react in acid jointly containing hydrionic water with the water containing acid, and generation contains CO2The water of gas, institute
That states contains CO2The water of gas carries out aeration stripping through aeration stripping area (3).
5. underground water treating device as claimed in claim 4, which is characterized in that ion is arranged in the ion-exchange area (1)
Exchanger (1-2), the ion-exchanger (1-2) quantity are two sets；The acid adjusts reaction zone (2) that mixer (2- is arranged
4)。
6. underground water treating device as claimed in claim 4, which is characterized in that the aeration stripping area (3) includes successively
Water inlet (3-1) is arranged in inhalant region, stripping area, water catchment area and the exhalant region of setting, the inhalant region, and the exhalant region is set
It sets water outlet (3-10), the height of the water inlet (3-1) away from bottom of device is greater than water outlet (3-10) away from bottom of device
Highly.
7. underground water treating device as claimed in claim 4, which is characterized in that it is orthogonal that the stripping area is equipped with twice
The first partition wall (3-2) and the second partition wall (3-4), the second partition wall (3-4) is arranged on the central axes of the first partition wall (3-2), the
The bottom of one partition wall (3-2) is 0.1~0.2m at a distance from bottom of device.
8. underground water treating device as claimed in claim 4, which is characterized in that the bottom setting aeration dress in the stripping area
It sets, the aerator includes vent stack (3-3), vent branch and aeration tube (3-7), wherein the edge vent stack (3-3)
The setting of the metope of first partition wall (3-2) and the second partition wall (3-4), vent branch include that the first vent branch (3-5) and second are logical
Gas branch pipe (3-6), first vent branch (3-5) with vent stack (3-3) is orthogonal is connected to bottom of device, and edge
The width direction in aeration stripping area (3) is extended, and the first vent branch of bottom of device is arranged in the second vent branch (3-6)
On (3-5), it is arranged on the second vent branch (3-6) multiple aeration tubes (3-7), the aeration face of the aeration tube (3-7)
Shape is shape wide at the top and narrow at the bottom.
9. underground water treating device as claimed in claim 8, which is characterized in that first vent branch of stripping area
The the first stripping area (A) and the second stripping area (B) that vertical plane where (3-5) separates, the first stripping area (A) and
The connection of the two stripping areas bottom (B).
10. underground water treating device as claimed in claim 9, which is characterized in that the pending water enter to first every
Hydraulic detention time between wall (3-2) is 1~3min, pending water enter the hydraulic detention time in stripping area be 25~
40min。
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| CN110240332A (en) * | 2019-05-30 | 2019-09-17 | 西安建筑科技大学 | Dirty processing method and processing device drops in a kind of softening of crystallization filtering type underground water |
| CN113754128A (en) * | 2021-09-27 | 2021-12-07 | 宿迁市河海大学研究院 | Method for removing hardness in drinking water of surface water plant |
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