CN206359382U - A kind of steel plant's high rigidity high alkalinity strong brine processing unit - Google Patents
A kind of steel plant's high rigidity high alkalinity strong brine processing unit Download PDFInfo
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- CN206359382U CN206359382U CN201621124775.0U CN201621124775U CN206359382U CN 206359382 U CN206359382 U CN 206359382U CN 201621124775 U CN201621124775 U CN 201621124775U CN 206359382 U CN206359382 U CN 206359382U
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Abstract
The utility model is related to a kind of steel plant's high rigidity high alkalinity strong brine processing unit, it includes removing hard dosing reaction device, concentrating and precipitating pond, tubular type film device, pH regulating reservoirs, counter-infiltration system, wherein except hard dosing reaction device is connected with concentrating and precipitating pond, concentrating and precipitating pond is connected with tubular type film device, tubular type film device is connected with pH regulating reservoirs, pH regulating reservoirs are connected with counter-infiltration system, solve the problem of current high rigidity high alkalinity strong brine can only handle discharge, influence enterprise locality water ecological environment.
Description
Technical field
The utility model is related to a kind of steel plant's high rigidity high alkalinity strong brine processing unit, i.e., using dosing except hardness-
Tube type filter membrance-tune pH- reverse osmosis concentrations-sprinkle slag or heat vexed dissolves concentrated water to handle the device of strong brine.
Background technology
Steel and iron industry is one of most industry of resource, energy resource consumption, needs to use substantial amounts of high-quality water money in production
Source, based on Municipal Sewage for Circulating.Because moisture largely evaporates during recirculated cooling water, salinity in water, organic matter etc. are caused
Concentration.Therefore the mode of which kind of processing, separation or concentration is either taken, finally always some water is that salt content is remote
Higher than water inlet, also just far above local underground water or the salt content of surface water.If this part strong brine water is directly discharged,
Local water quality will be produced and significantly affected, and cause the consequences such as dead, the Ecology destruction of salinization of soil, aquatic organism.Therefore generally only
Unnecessary salinity is changed into solid phase, the whole machine balancing of salinity is reached, scientific and reasonable disposal options are only.Two methods are more closed
Reason, a kind of is that the water of the high salinity in this part is evaporated into crystallization, forms solid；One kind is that strong brine continuation concentration is made into its amount
Reduce, sprinkle the processes such as slag for steel mill and dissolved.And evaporative crystallization is too high due to cost, at present more it is possible that strong brine
The method that minimizing is dissolved.
Some regional strong brine hardness are very high, have some basicity, sulfate radical content also very high, if such water quality is not
Directly continuation concentration is carried out through processing using reverse osmosis membrane, it will is separated out a large amount of sediments and is caused membranous system dirty stifled paralysis quickly
Paralysis.But reduction process is concentrated due to lacking the strong brine of mature and reliable, therefore the strong brine of many enterprises is not carried out at present
Minimizing is handled, and is still directly to be discharged after handling.
Also there are some enterprises to remove the progress of high rigidity high alkalinity strong brine and embrane method or the concentration of hot method are used after hard pretreatment, its
Pretreatment process is generally：Calcium hydroxide is added to high rigidity high alkalinity strong brine and removes temporary hardness, then adds sodium carbonate
And a small amount of sodium hydroxide removes permanent hardness, is then precipitated into sedimentation basin, supernatant is filtered into filter, and
PH is adjusted to neutrality into pH regulating reservoirs afterwards, then concentrated into counter-infiltration.There is floor space greatly in the technique, flow
Long, pretreatment effluent quality is poor, causes counter-infiltration dirt stifled serious, the cleaning frequency is too short, the problems such as membrane lifetime shortens.
Utility model content
The problem of being handled for above-mentioned high rigidity high alkalinity strong brine, it is high that the utility model provides a kind of steel plant's high rigidity
The technique of basicity strong brine processing.Steel plant's high rigidity high alkalinity that the purpose of this utility model is to provide a kind of mature and reliable is dense
Saline treatment technique, discharge can only be handled by solving current high rigidity high alkalinity strong brine, the local water ecological environment of influence enterprise
Problem.
The technical solution adopted in the utility model is as follows：A kind of steel plant's high rigidity high alkalinity strong brine decrement treatment work
Skill, it comprises the following steps：
(1) high rigidity high alkalinity strong brine is initially entered except hard dosing reaction device carries out dosing and mixing, wherein
Medicament is added for sodium hydroxide and/or calcium hydroxide, it is insoluble that medicament carries out fully reaction generation with high rigidity high alkalinity strong brine
Calcium carbonate, magnesium hydrate precipitate；
(2) enter concentrating and precipitating pond by the mixed solution of dosing in step (1), filled afterwards from the pond into tubular membrane
Put, preferably tube type filter membrance device is filtered, the concentrate after filtering, return to concentrating and precipitating pond and form mixed with solution in pond
Suspension is closed, while sediment is periodically discharged in concentrating and precipitating pond；
(3) the production water that the process after being filtered by tubular type film device removes hardness enters pH regulating reservoirs；Add in pH regulating reservoirs
Enter hydrochloric acid or sulphur acid for adjusting pH to neutrality；
(4) solution after the processing of pH regulating reservoirs, is then concentrated again into reverse osmosis unit；The production water of reverse osmosis unit
Recycled as industrial fresh water, the concentrated water of reverse osmosis unit delivers to the bold and vigorous slag of steel plant or does steel slag hot disintegrating processing and uses；
It is preferred that, high rigidity high alkalinity strong brine discharge reduction more than 80% or 80% of the concentrated water water than step (1).
Wherein, except hard dosing reaction device is that dosing removes hard reaction tank, it is two-stage, and two-stage dosing always stops except hard reaction tank
The time is stayed at -2 hours 1 minute, preferably -1.8 hours 10 minutes, the residence time in concentrating and precipitating pond was excellent at -2 hours 2 minutes
Elect as -2 hours 10 minutes, the suspension solid content in concentrating and precipitating pond, in 0.1%-10%, is preferably 3-5%；Tubular type micro-filtration
The pore size filter of film is between 0.01 micron -1 micron, preferably 0.1-0.3 microns, residence times of pH regulating reservoirs 1 minute -
8 hours, preferably -7 hours 10 minutes, preferably 15 minutes, pH value was in 6.0-8.5 after the regulation of pH regulating reservoirs.
Wherein, the entrance of step (1) is divided into except hard dosing reaction device carries out dosing and mixing with carrying out pH regulations
Two steps, the first step mainly makes precipitation of calcium carbonate, and second step mainly makes remaining magnesium hydrate precipitate, except hard dosing reaction device is
The form of dosing mixed reaction pond, corresponding dosing mixed reaction pond is also classified into two-stage, and every grade of mixed reaction pond residence time is 1
- 1 hour minute, preferably 5-50 minutes, preferably 15 minutes, used medicament was also classified into two steps and added, and the first order is added
Calcium hydroxide or sodium hydroxide, 9.8-10.8 is arrived by pH regulations, and preferably by pH regulations to 10, the first order is except hard chemical feeding quantity is in 100-
2000mg/L, preferably 200-1500mg/L；The second level adds sodium hydroxide, and pH regulations are arrived into 11-12, and hard dosing is removed in the second level
Amount is in 100-2000mg/L, preferably 200-1500mg/L.
The utility model further relates to a kind of steel plant's high rigidity high alkalinity strong brine decrement processing apparatus, and it includes adding except hard
Medicine reaction unit, concentrating and precipitating pond, tubular type film device, pH regulating reservoirs, counter-infiltration system, wherein except hard dosing reaction device with it is dense
Contracting sedimentation basin is connected, and concentrating and precipitating pond be connected with tubular type film device, and tubular type film device is connected with pH regulating reservoirs, pH regulating reservoirs and instead
Osmosis system is connected, and high rigidity high alkalinity strong brine is initially entered except hard dosing reaction device carries out dosing and mixing, its
In add medicament for sodium hydroxide and/or calcium hydroxide, medicament carries out fully reaction generation not with high rigidity high alkalinity strong brine
Molten calcium carbonate, magnesium hydrate precipitate；The mixed solution of dosing enters concentrating and precipitating pond, is filled afterwards from the pond into tubular membrane
Put, preferably tube type filter membrance device is filtered, the concentrate after filtering, return to concentrating and precipitating pond and form mixed with solution in pond
Suspension is closed, while sediment is periodically discharged in concentrating and precipitating pond；Process after being filtered by tubular type film device removes the production water of hardness
Into pH regulating reservoirs；Hydrochloric acid or sulphur acid for adjusting pH are added in pH regulating reservoirs to neutrality；Solution after the processing of pH regulating reservoirs, then
Concentrated again into reverse osmosis unit；The production water of reverse osmosis unit is recycled as industrial fresh water, reverse osmosis unit
Concentrated water deliver to steel plant sprinkle slag or do steel slag hot disintegrating processing use；It is preferred that, concentrated water water is than the original dense salt of high rigidity high alkalinity
Water discharge reduction is more than 80% or 80%.
Wherein, except hard dosing reaction device is that dosing removes hard reaction tank, it is two-stage, and two-stage dosing always stops except hard reaction tank
The time is stayed at -2 hours 1 minute, preferably -1.8 hours 10 minutes, the residence time in concentrating and precipitating pond was excellent at -2 hours 2 minutes
Elect as -2 hours 10 minutes, the suspension solid content in concentrating and precipitating pond, in 0.1%-10%, is preferably 3-5%；Tubular type micro-filtration
The pore size filter of film is between 0.01 micron -1 micron, preferably 0.1-0.3 microns, residence times of pH regulating reservoirs 1 minute -
8 hours, preferably -7 hours 10 minutes, preferably 15 minutes, pH value was in 6.0-8.5 after the regulation of pH regulating reservoirs.
Wherein, carry out dosing and mix to be divided into two steps, first to carry out pH regulations into except hard dosing reaction device
Step mainly makes precipitation of calcium carbonate, and second step mainly makes remaining magnesium hydrate precipitate, except hard dosing reaction device mixes for dosing
The form of reaction tank, corresponding dosing mixed reaction pond is also classified into two-stage, and every grade of mixed reaction pond residence time is 1 minute -1 small
When, preferably 5-50 minutes, preferably 15 minutes, used medicament was also classified into two steps and added, and the first order adds calcium hydroxide
Or sodium hydroxide, 9.8-10.8 is arrived into pH regulations, preferably by pH regulations to 10, the first order is except hard chemical feeding quantity is in 100-2000mg/
L, preferably 200-1500mg/L；The second level adds sodium hydroxide, pH regulations is arrived into 11-12, the second level exists except hard chemical feeding quantity
100-2000mg/L, preferably 200-1500mg/L.
Wherein, high rigidity high alkalinity strong brine is initially entered except hard chemicals dosing plant carries out dosing and mixing, wherein throwing
Adding medicine is sodium hydroxide, the one or more of which of calcium hydroxide, and medicament carries out fully anti-with high rigidity high alkalinity strong brine
Insoluble calcium carbonate, magnesium hydrate precipitate should be generated.Its principle is：By adding containing soluble-salt hydroxy so that water
The hydroxyl content increase of middle dissolving, and cause pH rise so that the carbonate buffer system system balanced sequence in water, with carbonic acid
Basicity based on hydrogen radical is largely converted into carbonate.According to the principle of solubility product saturation, it is difficult to be produced with hydroxyl, carbonate
The cation of dissolved salt, such as calcium ion, magnesium ion, iron ion, copper ion, can all be precipitated from water because of being formed more than saturation degree
Body is separated out.Because solubility product is calculated by each ion product ionized, therefore when rear end reverse osmosis membrane is produced, in concentrated water
Ion concentration can concentrate several times, and solubility product can be then raised up to decades of times even hundreds of times, if front end hardness clearance
It is not high enough, then precipitation can be largely separated out during reverse osmosis concentration or crystalline solid attachment is blocked in membranous system, cause film clear
Wash the cycle and drastically shorten.Therefore dosing is except the hard production water for needing to consider rear end counter-infiltration when calculating setting clearance
Rate, the pH value adjusted, contained basicity/sulfate radical/phosphate radical plasma content in water when entering film, and the concentration polarization on film surface
The factors such as change.
, can by dosing except hard reaction and the filtration of tubular membrane after chemical feeding quantity reasonable in design and dosing species
So that the suspended material in water, colloid, bacterium and the organic matter or polymer filtration of large-scale virus and some macromolecules to be gone
Remove, eliminate follow-up counter-infiltration by the stifled risk of dirt；Calcium ions and magnesium ions, iron ion, the aluminium ion of form can will be dissolved in water
Removed Deng being filtered in the form of generating hydroxide sediment or carbonate sediment, eliminate follow-up counter-infiltration by these things
Matter is deposited or crystallization causes dirty stifled risk；Meanwhile, if containing a small amount of organic pollution in high rigidity high alkalinity strong brine,
When regulation to pH is in strong basicity, the reaction such as saponification can occur with hydroxyl, organic pollution is lost adhesiveness, so as to keep away
The Organic Pollution to microfiltration membranes and reverse osmosis membrane is exempted from.
Enter concentrating and precipitating pond by dosing and the high rigidity high alkalinity strong brine mixed.Dosing hardness removing device is stopped
Stay the time to be determined according to water quality and reaction precipitation type, optimal value was determined between -2 hours 1 minute, principle is that selection ensures to sink
The minimum residence time that starch is fully separated out.
Then, the high rigidity high alkalinity strong brine mixed by dosing enters concentrating and precipitating pond.The height in concentrating and precipitating pond is hard
Degree high alkalinity strong brine enters tube type filter membrance with the mixed liquor that sediment is formed and carries out circulating filtration, by the production except hardness
Water enters pH regulating reservoirs, and dope returns to concentrating and precipitating pond, while bottom of pond periodically discharges sediment.Sediment using continuous discharge or
Solution in periodically discharge, concentrating and precipitating pond, its solid content is controlled in 0.1%-10%.
PH regulating reservoirs are to by being continuously adjusted and being stablized pH except hard water, pH is in 6.0- after general control regulation
8.5.Adjust the strong brine after pH and enter the concentration that reverse osmosis membrane carries out salinity, the production water of counter-infiltration as industrial fresh water reuse or
Purify and used as boiler feed water again, strong brine is evaporated crystallization or dissolved for sprinkling the techniques such as slag.The knot of counter-infiltration
Structure is designed according to influent quality with desired concentrated water salt content, can design two-stage or multistage, and two sections or multistage.Control
The salt content of the strong brine of counter-infiltration system reaches 20000-100000mg/l, and concentrated water delivers to steel plant and sprinkles slag or do steel slag hot disintegrating
Processing is used.
Present treatment technique does not handle directly discharge with existing strong brine and compared, and has the following advantages that：(1) avoid and break week
The salt balance of side water environment, and cause soil and riverbed salinization of soil；(2) avoid and cause Ecology disaster.
Present treatment technique is removed hard pretreatment with existing evaporative crystallization and routine and compared, and has the following advantages that：(1) except hard processing
Hardness is lower afterwards, and basicity is smaller as caused by carbonator system, therefore when counter-infiltration high magnification numbe is concentrated also without Precipitation
Risk, it is to avoid the inorganic sediment pollution of reverse osmosis membrane；(2) effluent quality after tubular type membrane filtration is compared to conventional precipitation filtering
Pretreatment, more preferably, filtering eliminates whole suspended materials, colloid, bacterium and large-scale virus and some macromoleculars to effluent quality
The organic matter or polymer of amount, eliminate follow-up counter-infiltration by the stifled risk of dirt；(3) processing technological flow is greatly simplified, and
Main equipment is standard modular equipment, and more convenient quickly is safeguarded in design and installation；(4) facility floor space is greatly reduced；(5)
Due to pretreatment water quality far better than conventional except hard pretreatment, therefore reverse osmosis concentration can make concentrated water reach higher saliferous
Amount, smaller concentrated water flow, and make counter-infiltration that there is longer service life and cleaning frequency.(6) concentrated water delivers to steel plant
Sprinkle slag or do steel slag hot disintegrating processing and use, by the minimizing of front end, can accomplish that concentrated water water is sufficiently small, steel slag hot disintegrating or bold and vigorous
Slag technique can be received using dissolving completely, accomplished without row outside concentrated water.
Brief description of the drawings
Fig. 1 is steel plant's high rigidity high alkalinity strong brine processing technology flow chart.
Embodiment
As shown in figure 1, high rigidity high alkalinity strong brine processing unit include except hard dosing reaction device, concentrating and precipitating pond,
Tubular type film device, pH regulating reservoirs, counter-infiltration system, wherein except hard dosing reaction device is connected with concentrating and precipitating pond, concentrating and precipitating
Pond is connected with tubular type film device, and tubular type film device is connected with pH regulating reservoirs, and pH regulating reservoirs are connected with counter-infiltration system, high rigidity
High alkalinity strong brine is initially entered except hard dosing reaction device carries out dosing and mixing, wherein adding medicament for sodium hydroxide
And/or calcium hydroxide, the medicament calcium carbonate insoluble with the abundant reaction generation of high rigidity high alkalinity strong brine progress, magnesium hydroxide sink
Form sediment；The mixed solution of dosing enters concentrating and precipitating pond, enters tubular type film device from the pond afterwards, and preferably tube type filter membrance is filled
Put and filtered, the concentrate after filtering returns to concentrating and precipitating pond and solution formation mixing suspension in pond, while concentrating and precipitating
Periodically discharge sediment in pond；The production water that process after being filtered by tubular type film device removes hardness enters pH regulating reservoirs；In pH regulations
Hydrochloric acid or sulphur acid for adjusting pH are added in pond to neutrality；Solution after the processing of pH regulating reservoirs, then enters reverse osmosis unit and carries out again
Concentration；The production water of reverse osmosis unit is recycled as industrial fresh water, and the concentrated water of reverse osmosis unit delivers to steel plant and sprinkles slag
Or do steel slag hot disintegrating processing use；It is preferred that, concentrated water water is than original high rigidity high alkalinity strong brine discharge reduction 80% or 80%
More than.Handling process is：(1) high rigidity high alkalinity strong brine initially enters dosing except hard reaction unit carries out dosing and mixing is stirred
Mix；(2) the high rigidity high alkalinity strong brine mixed by dosing enters concentrating and precipitating pond；(3) high rigidity in concentrating and precipitating pond is high
Basicity strong brine enters tube type filter membrance with the mixed liquor that sediment is formed and carries out circulating filtration, enters by the production water except hardness
Enter pH regulating reservoirs, dope returns to concentrating and precipitating pond；(4) strong brine of pH regulating reservoirs adds salt acid for adjusting pH to 6-8.5, and laggard
Enter reverse osmosis unit to be concentrated again；(5) the production water of reverse osmosis unit is recycled as industrial fresh water, the highly concentrated salt after concentration
Water water reduces more than 80% than former strong brine.(6) concentrated water delivers to the bold and vigorous slag of steel plant or does steel slag hot disintegrating processing and uses.
Wherein, high rigidity high alkalinity strong brine is initially entered except hard chemicals dosing plant (1) carries out dosing and mixing, wherein
Medicament is added for sodium hydroxide, the one or more of which of calcium hydroxide, medicament carries out abundant with high rigidity high alkalinity strong brine
The insoluble calcium carbonate of reaction generation, magnesium hydrate precipitate.
Enter concentrating and precipitating pond by dosing and the high rigidity high alkalinity strong brine mixed.Dosing hardness removing device is stopped
Stay the time to be determined according to water quality and reaction precipitation type, optimal value was determined between -2 hours 1 minute, principle is that selection ensures to sink
The minimum residence time that starch is fully separated out.
Then, the high rigidity high alkalinity strong brine mixed by dosing enters concentrating and precipitating pond.The height in concentrating and precipitating pond is hard
Degree high alkalinity strong brine enters tube type filter membrance with the mixed liquor that sediment is formed and carries out circulating filtration, by the production except hardness
Water enters pH regulating reservoirs, and dope returns to concentrating and precipitating pond, while bottom of pond periodically discharges sediment.Sediment using continuous discharge or
Solution in periodically discharge, concentrating and precipitating pond, its solid content is controlled in 0.1%-10%.
PH regulating reservoirs are to by being continuously adjusted and being stablized pH except hard water, pH is in 6.0- after general control regulation
8.5.Adjust the strong brine after pH and enter the concentration that reverse osmosis membrane carries out salinity, the production water of counter-infiltration as industrial fresh water reuse or
Purify and used as boiler feed water again, strong brine is evaporated crystallization or dissolved for sprinkling the techniques such as slag.The knot of counter-infiltration
Structure is designed according to influent quality with desired concentrated water salt content, can design two-stage or multistage, and two sections or multistage.Control
The salt content of the strong brine of counter-infiltration system reaches 20000-100000mg/l.
In order to which utility model is further described, the embodiment of use is as follows.Wherein embodiment is according to foregoing
What reaction principle was carried out.
Embodiment 1
Correlation water see the table below.
(1) high rigidity high alkalinity strong brine initially enters dosing except hard reaction unit carries out two-stage dosing, and the first order is added
PH is more than 9.8 in 100mg/L calcium hydroxide, hybrid reaction 1 minute, holding pond；The second level adds 100mg/L hydroxide
PH is 11 or so in sodium, hybrid reaction 1 minute, holding pond；(2) the high rigidity high alkalinity strong brine mixed by dosing enters dense
Contracting sedimentation basin, the concentrating and precipitating pond residence time is 2 minutes, and control solids content is 0.1%；(3) high rigidity in concentrating and precipitating pond
High alkalinity strong brine enters tube type filter membrance with the mixed liquor that sediment is formed and carries out circulating filtration, by the production water except hardness
Into pH regulating reservoirs, dope returns to concentrating and precipitating pond；(4) strong brine of pH regulating reservoirs adds salt acid for adjusting pH to 6.0, and laggard
Enter reverse osmosis unit to be concentrated again；(5) the production water of reverse osmosis unit is recycled as industrial fresh water, the highly concentrated salt after concentration
Water is used to smelt iron bold and vigorous slag.
The each operation water quality table of 1 embodiment of table 1
Embodiment 2
Correlation water see the table below.
(1) high rigidity high alkalinity strong brine initially enters dosing except hard reaction unit carries out two-stage dosing, and the first order is added
PH is 10.8 or so in 2000mg/L sodium hydroxide, hybrid reaction 60 minutes, holding pond；The second level adds 2000mg/L hydrogen
PH is 12 or so in sodium oxide molybdena, hybrid reaction 60 minutes, holding pond；(2) the high rigidity high alkalinity strong brine mixed by dosing
Into concentrating and precipitating pond, the concentrating and precipitating pond residence time is 120 minutes, and control solids content is 10%；(3) concentrating and precipitating pond
High rigidity high alkalinity strong brine enters tube type filter membrance with the mixed liquor that sediment is formed and carries out circulating filtration, by except hardness
Production water enter pH regulating reservoirs, dope returns to concentrating and precipitating pond；(4) strong brine of pH regulating reservoirs adds salt acid for adjusting pH to 8.5,
Then concentrated again into reverse osmosis unit；(5) the production water of reverse osmosis unit is recycled as industrial fresh water, after concentration
High strong brine is used for steel slag hot disintegrating.
The each operation water quality table of 2 embodiment of table 2
Embodiment 3
Correlation water see the table below.
(1) high rigidity high alkalinity strong brine initially enters dosing except hard reaction unit carries out two-stage dosing, and the first order is added
PH is 10.3 or so in 810mg/L sodium hydroxide, hybrid reaction 15 minutes, holding pond；The second level adds 442mg/L hydrogen-oxygen
PH is 11.3 or so in change sodium, hybrid reaction 15 minutes, holding pond；(2) the high rigidity high alkalinity strong brine mixed by dosing
Into concentrating and precipitating pond, the concentrating and precipitating pond residence time is 30 minutes, and control solids content is between 4%-5%；(3) it is heavy to concentrate
The high rigidity high alkalinity strong brine in shallow lake pond enters tube type filter membrance with the mixed liquor that sediment is formed and carries out circulating filtration, passes through
Except the production water of hardness enters pH regulating reservoirs, dope returns to concentrating and precipitating pond；(4) strong brine of pH regulating reservoirs adds salt acid for adjusting pH
To 6.35, then concentrated again into reverse osmosis unit；(5) the production water of reverse osmosis unit is recycled as industrial fresh water,
High strong brine after concentration is used for steel slag hot disintegrating.
The each operation water quality table of 3 embodiment of table 3.
Claims (4)
1. a kind of steel plant's high rigidity high alkalinity strong brine decrement processing apparatus, it is included except hard dosing reaction device, concentration are heavy
Shallow lake pond, tubular type film device, pH regulating reservoirs, counter-infiltration system, wherein except hard dosing reaction device is connected with concentrating and precipitating pond, concentration
Sedimentation basin is connected with tubular type film device, and tubular type film device is connected with pH regulating reservoirs, and pH regulating reservoirs are connected with counter-infiltration system, high hard
Degree high alkalinity strong brine is initially entered except hard dosing reaction device carries out dosing and mixing, wherein adding medicament for hydroxide
Sodium and/or calcium hydroxide, medicament carry out the fully insoluble calcium carbonate of reaction generation, magnesium hydroxide with high rigidity high alkalinity strong brine
Precipitation；The mixed solution of dosing enters concentrating and precipitating pond, is filtered afterwards from the pond into tubular type film device, after filtering
Concentrate, returns to concentrating and precipitating pond and solution formation mixing suspension in pond, while concentrating and precipitating pond bottom drain is periodically arranged
Put sediment；The production water that process after being filtered by tubular type film device removes hardness enters pH regulating reservoirs；Added in pH regulating reservoirs
Hydrochloric acid or sulphur acid for adjusting pH are to neutrality；Solution after the processing of pH regulating reservoirs, is then concentrated again into reverse osmosis unit；Reverse osmosis
The production water of saturating device is recycled as industrial fresh water, and the concentrated water of reverse osmosis unit delivers to steel plant and sprinkles slag or do steel slag hot
Vexed processing is used.
2. processing unit according to claim 1, it is characterised in that except hard dosing reaction device is that dosing is reacted except hard
Pond, it is two-stage.
3. the processing unit according to one of claim 1-2, it is characterised in that the tubular type film device is tube type filter membrance
Device.
4. the processing unit according to one of claim 1-2, it is characterised in that concentrated water water is than original high rigidity high alkalinity
Strong brine discharge reduction is more than 80% or 80%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107596780A (en) * | 2017-10-17 | 2018-01-19 | 中冶节能环保有限责任公司 | A kind of closed circuit water supply process system for slag processing |
| CN109607831A (en) * | 2019-02-14 | 2019-04-12 | 上海久安水质稳定剂厂 | A kind of steel mill's high rigidity waste water antisludging agent and immediate processing method |
-
2016
- 2016-10-14 CN CN201621124775.0U patent/CN206359382U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107596780A (en) * | 2017-10-17 | 2018-01-19 | 中冶节能环保有限责任公司 | A kind of closed circuit water supply process system for slag processing |
| CN109607831A (en) * | 2019-02-14 | 2019-04-12 | 上海久安水质稳定剂厂 | A kind of steel mill's high rigidity waste water antisludging agent and immediate processing method |
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