CN109592816A - Eliminate the device and method of reverse osmosis concentrated water permanent hardness and temporary hardness - Google Patents
Eliminate the device and method of reverse osmosis concentrated water permanent hardness and temporary hardness Download PDFInfo
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- CN109592816A CN109592816A CN201811538420.XA CN201811538420A CN109592816A CN 109592816 A CN109592816 A CN 109592816A CN 201811538420 A CN201811538420 A CN 201811538420A CN 109592816 A CN109592816 A CN 109592816A
- Authority
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- China
- Prior art keywords
- hardness
- tank
- crystallizer
- reverse osmosis
- thickener
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 28
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000002562 thickening agent Substances 0.000 claims abstract description 31
- 230000008676 import Effects 0.000 claims abstract description 29
- 239000000292 calcium oxide Substances 0.000 claims abstract description 23
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 23
- 238000004062 sedimentation Methods 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 239000012267 brine Substances 0.000 claims abstract description 13
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 13
- 238000005189 flocculation Methods 0.000 claims abstract description 12
- 230000016615 flocculation Effects 0.000 claims abstract description 12
- 230000001112 coagulating effect Effects 0.000 claims abstract description 11
- 239000013078 crystal Substances 0.000 claims abstract description 11
- 238000001556 precipitation Methods 0.000 claims abstract description 11
- 230000008030 elimination Effects 0.000 claims abstract description 6
- 238000003379 elimination reaction Methods 0.000 claims abstract description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 18
- 150000003839 salts Chemical class 0.000 claims description 18
- 238000002425 crystallisation Methods 0.000 claims description 13
- 230000008025 crystallization Effects 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000701 coagulant Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910001424 calcium ion Inorganic materials 0.000 claims description 2
- 238000005352 clarification Methods 0.000 claims 1
- 230000001376 precipitating effect Effects 0.000 claims 1
- 238000009738 saturating Methods 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 235000019589 hardness Nutrition 0.000 description 40
- 235000011132 calcium sulphate Nutrition 0.000 description 7
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000001175 calcium sulphate Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- -1 later Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 239000002699 waste material 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
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2001/5218—Crystallization
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to a kind of device and methods for eliminating reverse osmosis concentrated water permanent hardness and temporary hardness.Device therein includes that permanent hardness eliminates unit and temporary hardness elimination unit；It includes crystallizer, thickener and centrifugal dehydrator that the permanent hardness, which eliminates unit, the import of the crystallizer is connect with strong brine intake line, the import of the crystallizer is also connect with the dosing tank for flocculant and crystal seed to be added, the magma outlet of the crystallizer is connect with the import of the thickener, and the discharge port of the thickener is connect with the import of the centrifugal dehydrator；It includes sequentially connected quick lime reaction tank, coagulative precipitation tank, flocculation sedimentation tank and sedimentation basin that the temporary hardness, which eliminates unit, the water out of the crystallizer, the water out of the thickener, the centrifugal dehydrator water out connect with the import of the quick lime reaction tank.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of elimination reverse osmosis concentrated water permanent hardness and temporarily hard
The device and method of degree.
Background technique
The zero-emission of trade effluent becomes this century new ecological requirements, and the pollutant in zero emission requirement trade effluent exists
Different phase is shifted in the form of different, rather than is discharged into natural water in the form of waste water.Zero-discharge technology needs comprehensive
It closes and applies UF membrane, the processes such as evaporative crystallization and drying.For the zero-emission of high-salt wastewater, reverse osmosis membrane can be produced good
Desalted water becomes the one preferred technique of brine waste processing.But reverse osmosis producing water ratio generally only has 75%, the place of remaining concentrated water
Reason becomes distinct issues with discharge.Reverse osmosis concentrated water is highly concentrated strong brine, and the water resource of reverse osmosis concentrated water is returned
The separation of salinity in receipts and water, technical difficulty and economic cost are all higher.Currently, the typical side of disposition of reverse osmosis concentrated water
Method includes surface water discharge, deep-well injection, sprinkling irrigation, thermal evaporation etc..But above method is failed to the fine land productivity of reverse osmosis concentrated water
With the fundamentally discharge of reduction concentrated water, does not only cause adverse effect to ambient enviroment, also create the wave of water resource
Take.
Particularly, for all higher strong brine of permanent hardness and temporary hardness, on the one hand because being added to antisludging agent, so that
The difficulty of Crystallization Separation increases；On the other hand, the strong brine high for sulphates content, general processing method is will be permanent hard
Degree (calcium sulfate) transforms into temporary hardness (calcium carbonate), but the higher cost for the sodium carbonate being newly introduced.
Summary of the invention
The purpose of the present invention is at least solving one of above-mentioned problems of the prior art, which is by following skill
What art scheme was realized:
The invention proposes a kind of devices for eliminating reverse osmosis concentrated water permanent hardness and temporary hardness, which is characterized in that packet
It includes permanent hardness and eliminates unit and temporary hardness elimination unit；The permanent hardness eliminate unit include crystallizer, thickener and
The import of centrifugal dehydrator, the crystallizer is connect with strong brine intake line, and the import of the crystallizer is also and for being added
Flocculant is connected with the dosing tank of crystal seed, and the magma outlet of the crystallizer is connect with the import of the thickener, the stiff
The discharge port of device is connect with the import of the centrifugal dehydrator；It includes sequentially connected quick lime that the temporary hardness, which eliminates unit,
Reaction tank, coagulative precipitation tank, flocculation sedimentation tank and sedimentation basin, the water out of the crystallizer, the water out of the thickener, institute
The water out for stating centrifugal dehydrator is connect with the import of the quick lime reaction tank.
It further includes the second thickener and the second centrifugal dehydrator that the temporary hardness, which eliminates unit, second thickener
Import is connect with the outlet of the sedimentation basin, and the discharge port of second thickener is connect with the import of the second centrifugal dehydrator.
The sedimentation basin is inclined-plate clarifying basin.
It is equipped with quick lime dosing tank on the quick lime reaction tank, coagulant dosing is equipped on the coagulative precipitation tank
Case is set on the flocculation sedimentation tank by flocculant dosing tank.
The crystallizer includes crystallizing tank, guide shell, blender and capping, and the crystallizing tank is arranged in the guide shell
Inside, the blender are arranged in the guide shell, and the blender is propeller agitator, and the import of the crystallizer is set
It sets in the middle and lower part of the crystallizing tank, is exported in the bottom of the crystallizing tank equipped with the magma, the top of the crystallizing tank is set
There is settling section, forms ring cavity, the water out setting of the crystallizer between the top of the crystallizing tank and the outer wall of the capping
In the bottom of the ring cavity.
The top of the crystallizing tank is equipped with outward in the expansion segment of 30 ° of angles expansion, is equipped at the top of the expansion segment perpendicular
The region that the overflow baffle directly arranged, the expansion segment and overflow baffle are formed is the settling section, the overflow baffle and institute
It states and forms the ring cavity between the outer wall of capping.
The diameter of propeller blade of the propeller agitator accounts for the 1/3 of crystallizing tank internal diameter.
The invention also provides a kind of methods for eliminating reverse osmosis concentrated water permanent hardness and temporary hardness, based on above-mentioned dress
It sets and implements, the described method comprises the following steps:
1) reverse osmosis concentrated water is introduced into crystallizer by strong brine intake line, meanwhile, it is connected by dosing tank to crystallization
Investment can eliminate the flocculant of the peptizaiton of antisludging agent and can promote the calcium sulfate crystal seed of crystal growth in device；
2) concentrated water crystallizes in crystallizer, after the magma that crystallization process obtains enters thickener progress concentration, then it is defeated
It send to centrifugal dehydrator and is carried out dehydrating, the calcium sulfate of low-water-content is obtained after dehydration；The water that crystallization process is isolated is to disappear
Except the salt water of permanent hardness, the water that the salt water and thickener and centrifugal dehydrator are isolated is delivered to temporary hardness and is eliminated
Unit；
3) salt water for being delivered to temporary hardness elimination unit reacts in quick lime reaction tank, and calcium ion therein turns
Calcium carbonate is turned to, then coagulant successively is added in coagulative precipitation tank, flocculant is added in flocculation sedimentation tank, finally in sedimentation basin
In precipitated, to realize separation of solid and liquid, liquid obtained after separation is the salt water for eliminating temporary hardness.
Further, reverse osmosis concentrated water is in crystallizer residence time less than 1.5 hours.
Further, quick lime is added in quick lime reaction tank and the PH of solution is made to be more than 10.
The present invention has the advantages that
Processing unit and method proposed by the invention can either eliminate the permanent hardness in strong brine, can also eliminate temporarily
When hardness, the hardness of treated water can drop to 30mg/L hereinafter, being used to enable salt water to recycle, and process
Cheng Bubi quotes other displacer reagents, saves reagent cost, but also recycled good calcium sulphate crystal, farthest
Resource is saved.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of processing unit of the present invention.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to thoroughly understand the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened is fully disclosed to those skilled in the art.
It should be understood that term used herein merely for description particular example embodiment purpose, and have no intention into
Row limitation.Unless the context clearly indicates otherwise, otherwise singular " one " as used in the text, "one" and " described "
Can also indicate to include plural form.The terms "include", "comprise", " containing " and " having " are inclusives, and therefore
It indicates the presence of stated feature, step, operations, elements, and/or components, but presence or addition one or more is not precluded
A other feature, step, operation, component, assembly unit, and/or their combination.
Although can be described in the text using term first, second, third, etc. multiple element, component, region, layer and/
Or section, still, these component, assembly units, region, layer and/or section should not be limited by these terms.These terms can be only
For a component, assembly unit, region, layer or section are distinguished with another region, layer or section.Unless context clearly refers to
Out, do not implied that when otherwise the term and other numerical terms of such as " first ", " second " etc use in the text sequence or
Person's order.Therefore, first element discussed below, component, region, layer or section are in the introduction for not departing from example embodiment
In the case of can be referred to as second element, component, region, layer or section.
For ease of description, an element as illustrated in the diagram can be described use space relativeness term in the text
Either feature is relative to another element or the relationship of feature, these relativeness terms are, for example, " inside ", " outside ", " interior
Side ", " outside ", " following ", " lower section ", " above ", " top " etc..This spatial correlation term is intended to include removing to retouch in figure
The different direction of device in use or operation except the orientation drawn.For example, being retouched if the device in figure is overturn
State for " below other elements or feature " either the element " below other elements or feature " will then be orientated "
Above other elements or feature " either " above other elements or feature ".Therefore, exemplary term " in ... lower section " can
To include in orientation upper and under.In addition device can be oriented and (be rotated by 90 ° or in other directions) and used herein
Spatial correlation descriptor correspondingly explains.
As shown in Figure 1, the invention proposes a kind of devices for eliminating reverse osmosis concentrated water permanent hardness and temporary hardness, including
Permanent hardness eliminates unit 1 and temporary hardness eliminates unit 2.It includes crystallizer 101, thickener 102 that permanent hardness, which eliminates unit 1,
Import with centrifugal dehydrator 103, crystallizer 101 is connect with strong brine intake line, and the import of crystallizer 101 is also and for adding
The dosing tank 104 for entering flocculant and crystal seed connects, and the magma outlet of crystallizer 101 is connect with the import of thickener 102, thickener
102 discharge port is connect with the import of centrifugal dehydrator 103.It includes that sequentially connected quick lime is anti-that temporary hardness, which eliminates unit 2,
Answer pond 201, coagulative precipitation tank 202, flocculation sedimentation tank 203 and sedimentation basin 204, the water out of crystallizer 101, thickener 102
Water out, centrifugal dehydrator 103 water out connect with the import of quick lime reaction tank 201.
Further, it further includes the second thickener 205 and the second centrifugal dehydrator 206 that temporary hardness, which eliminates unit 2, and second
The import of thickener 205 is connect with the outlet of sedimentation basin 204, the discharge port of the second thickener 205 and the second centrifugal dehydrator 206
Import connection.The carbonate particle isolated in sedimentation basin 204 is successively delivered to the second thickener 205 and the second centrifugal dehydration
Machine 206, recycles salt water further.
Further, sedimentation basin 204 is inclined-plate clarifying basin.
Further, it is equipped with quick lime dosing tank 207 on quick lime reaction tank 201, is equipped on coagulative precipitation tank 202
Coagulant dosing tank 208 is equipped with flocculant dosing tank 209 on flocculation sedimentation tank 203.
Further, crystallizer 101 includes crystallizing tank 111, guide shell 112, blender 113 and capping 114, guide shell
112 are arranged in the inside of crystallizing tank 111, and blender 113 is arranged in guide shell 112, and blender 113 is propeller agitator,
The middle and lower part of crystallizing tank 111 is arranged in the import of crystallizer 101, is equipped with magma outlet 115, crystallization in the bottom of crystallizing tank 111
The top of tank 111 is equipped with settling section 116, and ring cavity 117, crystallizer are formed between the top of crystallizing tank 111 and the outer wall for covering 114
The bottom of ring cavity 117 is arranged in 101 water out 118.Crystallizer 101 at work, under the promotion of blender 113, water flow
It can decline along the inner wall of guide shell 112 and rise along the outer wall of guide shell 112, to form circulation, be stirred by adjusting
The revolving speed of device 113 is mixed, the rate of water flow rising and decline can be made into 9 times of 101 strong brine flow velocity of crystallizer, i.e. crystalline substance liquid
Reflux ratio is 800%.
Further, the top of crystallizing tank 111 is equipped with outward in the expansion segment of 30 ° of angles expansion, is set at the top of expansion segment
There is the overflow baffle 119 arranged vertically, the region that expansion segment and overflow baffle 119 are formed is settling section 116, overflow baffle 119
Ring cavity 117 is formed between the outer wall of capping 114.The salt water of the removal permanent hardness obtained by crystallization is via overflow baffle
119 spill into water out 118, eliminate unit 2 hence into temporary hardness.
Further, the diameter of propeller blade of propeller agitator accounts for the 1/3 of crystallizing tank internal diameter.
Further, the motor of blender 113 uses frequency conversion control technique, and the stirring phase uses high stirring rate, crystallization
Phase is converted to low stirring rate.
Based on above-mentioned processing unit, the invention also provides a kind of elimination reverse osmosis concentrated water permanent hardness and temporary hardnesses
Method, comprising the following steps:
1) reverse osmosis concentrated water is introduced into crystallizer 101 by strong brine intake line, meanwhile, it is connected by dosing tank 104
Into crystallizer 101, investment can eliminate the flocculant of the peptizaiton of antisludging agent and the calcium sulfate of crystal growth can be promoted brilliant
Kind；
2) concentrated water crystallizes in crystallizer 101, and the magma that crystallization process obtains enters thickener 102 and carries out concentration
Afterwards, it then is delivered to centrifugal dehydrator 103 and is carried out dehydrating, the calcium sulfate of low-water-content is obtained after dehydration；Crystallization process separation
Water out is the salt water for eliminating permanent hardness, and the water that the salt water and thickener 102 and centrifugal dehydrator 103 are isolated is defeated
It send to temporary hardness and eliminates unit 2；
3) be delivered to temporary hardness eliminate unit 2 salt water in quick lime reaction tank 201 with Ca (OH)2React life
At calcium carbonate, later, coagulant successively is added in coagulative precipitation tank 202 again in salt water, and flocculation is added in flocculation sedimentation tank 203
Agent is finally precipitated in sedimentation basin, to realize separation of solid and liquid, liquid obtained after separation is to eliminate temporary hardness
Salt water.
Further, reverse osmosis concentrated water in 101 residence time of crystallizer less than 1.5 hours, preferably 1 hour.
Further, quick lime is added in quick lime reaction tank 201 and the PH of solution is made to be more than 10, is 11 in pH value
Under conditions of, magnesium ion is also precipitated out in the form of magnesium carbonate.
Further, it can also add and stir in quick lime reaction tank 201, coagulative precipitation tank 202, flocculation sedimentation tank 203
Device is mixed, to accelerate the processes such as reaction, mixing.
Processing unit and method proposed by the invention can either eliminate the permanent hardness in strong brine, can also eliminate temporarily
When hardness, the hardness of treated water can drop to 30mg/L hereinafter, being used to enable salt water to recycle, and process
Cheng Bubi quotes other displacer reagents, saves reagent cost, but also recycled good calcium sulphate crystal, farthest
Resource is saved.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (10)
1. a kind of device for eliminating reverse osmosis concentrated water permanent hardness and temporary hardness, which is characterized in that eliminated including permanent hardness
Unit and temporary hardness eliminate unit；
It includes crystallizer, thickener and centrifugal dehydrator that the permanent hardness, which eliminates unit, the import of the crystallizer and dense salt
Water input conduit connection, the import of the crystallizer are also connect with the dosing tank for flocculant and crystal seed to be added, the crystallization
The magma outlet of device is connect with the import of the thickener, and the import of the discharge port of the thickener and the centrifugal dehydrator connects
It connects；
The temporary hardness eliminates unit and includes sequentially connected quick lime reaction tank, coagulative precipitation tank, flocculation sedimentation tank and sink
Shallow lake pond, the water out of the crystallizer, the water out of the thickener, the centrifugal dehydrator water out with the raw stone
The import of grey reaction tank connects.
2. eliminating the device of reverse osmosis concentrated water permanent hardness and temporary hardness as described in claim 1, which is characterized in that described
It further includes the second thickener and the second centrifugal dehydrator that temporary hardness, which eliminates unit, and the import of second thickener is sunk with described
The outlet in shallow lake pond connects, and the discharge port of second thickener is connect with the import of the second centrifugal dehydrator.
3. eliminating the device of reverse osmosis concentrated water permanent hardness and temporary hardness as claimed in claim 1 or 2, which is characterized in that
The sedimentation basin is inclined-plate clarifying basin.
4. eliminating the device of reverse osmosis concentrated water permanent hardness and temporary hardness as claimed in claim 1 or 2, which is characterized in that
It is equipped with quick lime dosing tank on the quick lime reaction tank, coagulant dosing tank is equipped on the coagulative precipitation tank, in institute
It states and is set on flocculation sedimentation tank by flocculant dosing tank.
5. eliminating the device of reverse osmosis concentrated water permanent hardness and temporary hardness as claimed in claim 1 or 2, which is characterized in that
The crystallizer includes crystallizing tank, guide shell, blender and capping, and the inside of the crystallizing tank, institute is arranged in the guide shell
It states blender to be arranged in the guide shell, the blender is propeller agitator, and the import of the crystallizer is arranged in institute
The middle and lower part for stating crystallizing tank is exported in the bottom of the crystallizing tank equipped with the magma, and the top of the crystallizing tank is equipped with clarification
Area, forms ring cavity between the top of the crystallizing tank and the outer wall of the capping, the water out of the crystallizer is arranged described
The bottom of ring cavity.
6. eliminating the device of reverse osmosis concentrated water permanent hardness and temporary hardness as claimed in claim 5, which is characterized in that described
The top of crystallizing tank is equipped with outward in the expansion segment of 30 ° of angles expansion, and the overflow arranged vertically is equipped at the top of the expansion segment
The region that baffle, the expansion segment and overflow baffle are formed is the settling section, the outer wall of the overflow baffle and the capping
Between form the ring cavity.
7. eliminating the device of reverse osmosis concentrated water permanent hardness and temporary hardness as claimed in claim 5, which is characterized in that described
The diameter of propeller blade of propeller agitator accounts for the 1/3 of crystallizing tank internal diameter.
8. it is a kind of eliminate reverse osmosis concentrated water permanent hardness and temporary hardness method, which is characterized in that based on as claim 1 to
7 described in any item devices and implement, the described method comprises the following steps:
1) reverse osmosis concentrated water is introduced into crystallizer by strong brine intake line, meanwhile, it is connected by dosing tank into crystallizer
Investment can eliminate the flocculant of the peptizaiton of antisludging agent and can promote the calcium sulfate crystal seed of crystal growth；
2) concentrated water crystallizes in crystallizer, after the magma that crystallization process obtains enters thickener progress concentration, then is delivered to
Centrifugal dehydrator is carried out dehydrating, and the calcium sulfate of low-water-content is obtained after dehydration；The water that crystallization process is isolated is to eliminate forever
The water that the salt water and thickener and centrifugal dehydrator are isolated is delivered to temporary hardness and eliminates list by the salt water of long hardness
Member；
3) salt water for being delivered to temporary hardness elimination unit reacts in quick lime reaction tank, and calcium ion therein is converted into
Calcium carbonate, then successively in coagulative precipitation tank be added coagulant, flocculant is added in flocculation sedimentation tank, finally in sedimentation basin into
Row precipitating, to realize separation of solid and liquid, liquid obtained after separation is the salt water for eliminating temporary hardness.
9. eliminating the method for reverse osmosis concentrated water permanent hardness and temporary hardness as claimed in claim 8, which is characterized in that reverse osmosis
Saturating concentrated water is in crystallizer residence time less than 1.5 hours.
10. eliminating the method for reverse osmosis concentrated water permanent hardness and temporary hardness as claimed in claim 8, which is characterized in that
Quick lime is added in quick lime reaction tank and the PH of solution is made to be more than 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN116835819A (en) * | 2023-08-07 | 2023-10-03 | 北京新源智慧水务科技有限公司 | Softening and descaling treatment device and method for seed crystal crystallization method |
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