CN108314240A - A kind for the treatment of process of iron oxide red mother liquor - Google Patents
A kind for the treatment of process of iron oxide red mother liquor Download PDFInfo
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- CN108314240A CN108314240A CN201711274676.XA CN201711274676A CN108314240A CN 108314240 A CN108314240 A CN 108314240A CN 201711274676 A CN201711274676 A CN 201711274676A CN 108314240 A CN108314240 A CN 108314240A
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- 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
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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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention discloses a kind for the treatment of process of iron oxide red mother liquor.The present invention treatment process include：Flocculating setting pre-processes, pre-oxidation, adjusts acid, low pressure reverse osmosis processing, six steps of high pressure reverse-osmosis treated and MVR concentration and evaporations.This process energy consumption is small, and resource utilization is high, and waste water treatment efficiency is high, and processing is thorough, will not cause secondary pollution, and entire technique forms a complete closed-loop system, realizes recycling for waste water, can realize wastewater zero discharge.
Description
Technical field
The invention belongs to water-treatment technology fields, more particularly to a kind for the treatment of process of iron oxide red mother liquor.
Background technology
Iron oxide red, also known as colcother, rust is red, iron is bright red etc., its chemical name is di-iron trioxide, covering power and coloring
Power is all very high, and fast light, heat-resisting, weather-proof, anti-fouling performance is very excellent.Due to iron oxide red pigment function admirable, price is again very low
It is honest and clean, thus its be widely used it is general.It can be made into coloured cement, colored lime among the alkaline building materials of iron oxide red incorporation such as cement, lime；Iron
Red incorporation rubber product can play good reinforcement and pigmentation, and can antiultraviolet degradation.Iron oxide red anti-corrosive primer is several
It is used by most of low and middle-grade antirust construction engineerings, has saved the face of a large amount of not only valuable but also virose leaded, zinc, chromium
Material.
The production method of iron oxide red mainly has two kinds of dry and wet, and wherein nitration mixture salt wet method, which prepares iron oxide red, can use phase
The higher finished product of quality is made to lower cost, therefore is used by most enterprises.However, in the production work of above-mentioned iron oxide red
In skill, the acid waste water containing a large amount of ferrous ions and ammonium ion will produce.Such waste water has coloration high, and acidity is strong, ammonia
The features such as nitrogen concentration is high, and ferrous ion content is high, direct emission can generate water body serious pollution.
Chinese patent discloses CN104743746A and discloses a kind of processing method of iron oxide red waste water, and this method is using wadding
The combination of the techniques such as retrogradation drop+stripping+biochemical treatment realizes the processing of iron oxide red waste water, but what is used in the technique blows
De- Process on Ammonia Nitrogen is handled, be not thorough with stripping, the easy fouling of filler, spilling ammonia nitrogen secondary pollution etc. can be caused to lack
Point.Therefore, it is badly in need of a kind of environmentally safe, iron oxide red waste water treatment process of high treating effect of exploitation.
On end, the present invention in view of the above-mentioned defects in the prior art and the market demand, develops a kind of iron oxide red mother liquor
Treatment process, the technique waste water treatment effeciency is high, and processing is thorough, not will produce secondary pollution, can reach wastewater zero discharge
Target.
Invention content
The purpose of the present invention is to provide a kind for the treatment of process of iron oxide red mother liquor.This process energy consumption is small, the utilization of resources
Rate is high, and waste water treatment efficiency is high, and processing is thorough, will not cause secondary pollution, and entire technique forms a complete closed loop system
System, realizes recycling for waste water, can realize wastewater zero discharge.
To achieve the above object, the present invention takes following technical scheme：
A kind for the treatment of process of iron oxide red mother liquor, specifically comprises the following steps：
(1) flocculating setting pre-processes：Alkaline matter is added in iron oxide red mother liquor, flocculating setting is carried out to mother liquor, so
Press filtration afterwards obtains filtrate and iron cement；
(2) it pre-oxidizes：A certain proportion of oxidant is added in the filtrate that step (1) obtains or carries out Air Exposure；
(3) acid is adjusted：Appropriate acidic materials are added in filtrate after step (2) pre-oxidation, adjust the pH value of filtrate to 4-
8；
(4) low pressure reverse osmosis is handled：The filtrate after acid will be adjusted to be placed in low pressure reverse osmosis device, carried out at low pressure reverse osmosis
It manages, a part of fresh water and a part of concentrated water is obtained after low pressure reverse osmosis, fresh water returns to plant area's reuse, is used as industrial water,
Concentrated water is further processed；
(5) high pressure reverse-osmosis treated：For the concentrated water that low pressure reverse osmosis processing is generated into horizontal high voltage reverse-osmosis treated, high pressure is anti-
A part of fresh water and a part of concentrated water are obtained after infiltration, fresh water returns to plant area's reuse, is used as industrial water, and concentrated water carries out down
The processing of one step；
(6) MVR concentration and evaporations：The concentrated water generated through high pressure reverse-osmosis treated is subjected to MVR evaporations, obtains salt, concentrate
And condensed water.
Preferably, the one kind or several of the alkaline matter described in step (1) in sodium hydroxide, potassium hydroxide, ammonium hydroxide
Kind, the pH value of mother liquor is adjusted to 9-11.By the flocculating setting of above-mentioned alkaline matter, can remove most of iron in mother liquor from
Son.
Preferably, the iron cement that press filtration obtains in step (1) is as crystal seed for producing iron oxide red.
Preferably, one kind in hydrogen peroxide, sodium hypochlorite, chlorine dioxide of the oxidant described in step (2) or
It is several.Remaining oxidation of divalent iron ion in step (1) can be ferric ion, the shape in alkaline solution by pre-oxidation step
At ferric hydroxide colloid, iron ion not only can be preferably settled, but also the suspended particulate in mother liquor and some weights can be adsorbed
Metal ion can reach purpose of purifying the water quality while removing iron ion.
Preferably, one or several kinds of the acidic materials described in step (3) in hydrochloric acid, sulfuric acid, nitric acid, will filter
The pH value of liquid is adjusted to 4-8.
Preferably, the pressure of the low pressure reverse osmosis processing described in step (4) is 2MPa-4.5MPa；It is furthermore preferred that described
Pressure is 3MPa.
Preferably, the pressure of the high pressure reverse-osmosis treated described in step (5) is 5.5MPa-8.0Mpa；It is furthermore preferred that institute
It is 7MPa to state pressure.
Preferably, the salt described in step (6) is the salt of nitrogen content 17-21wt%, as industrial salt reuse, concentrate
Continue to return to concentration and evaporation system production salt, condensed water returns to plant area's reuse as industrial water.
The present invention has following technical characterstic：
1) present invention can remove ferrous ion and ferric ion in waste water by flocculating setting, do not only reached and gone
The purpose of iron ions, and the iron cement that flocculating setting generates can be used as seed production iron oxide red, realize the money of iron cement
Sourceization utilizes.
2) remaining oxidation of divalent iron ion after flocculating setting can be ferric ion by pre-oxidation step of the present invention,
Ferric hydroxide colloid is formed in alkaline solution, not only can preferably settle iron ion, but also can adsorb the suspension in mother liquor
Particle and some heavy metal ion, can reach purpose of purifying the water quality while removing iron ion.
3) present invention is using low pressure reverse osmosis and high pressure is reverse osmosis is concentrated to iron oxide red mother liquor waste water, not only can be with
Salt content is improved, reduces evaporation energy consumption, and reverse osmosis production water can return to plant area as industrial water reuse, improve
The utilization rate of resource.
4) industrial salt can be made by MVR evaporation and concentration in the present invention, and gained condensed water can equally return to plant area's work
For industrial water reuse, the utilization rate of resource is improved.
5) present invention is concentrated by flocculating setting, pre-oxidation, low pressure reverse osmosis processing, high pressure reverse-osmosis treated and MVR
Six steps are evaporated, a complete iron oxide red closed-loop process system is formd, realizes recycling for waste water, reach
The target of wastewater zero discharge.
Specific implementation mode
Following specific examples is the further explanation to method provided by the invention and technical solution, but is not construed as
Limitation of the present invention.
Embodiment 1：
A kind of mother liquor producing ferric oxide red colorant generation, with following parameter characteristic：PH=3.0, ammonia nitrogen value are
4800mg/L, sulfate radical content 16492mg/L, salt content 2.3%.
A kind of Zero-discharge treating process of iron oxide red mother liquor, the technique include the following steps：
(1) flocculating setting pre-processes：It is 25- that appropriate mass concentration is added in iron oxide red mother liquor under stirring conditions
28% ammonium hydroxide adjusts the pH to 9 of mother liquid coming, and a small amount of PAM solution is then added and carries out flocculating setting to mother liquid coming, then uses
It is pumped into press filteration system and carries out press filtration, obtain filtrate and iron cement.Obtained iron cement can be used as seed production iron oxide red.
(2) it pre-oxidizes：Air Exposure is carried out to the gained filtrate of step (1), to by step (1) it is remaining it is ferrous from
Son is oxidized to ferric ion, and ferric hydroxide colloid is formed in alkaline environment, can with the suspension little particle in adsorbed water body with
And some heavy metal ion, larger particles are agglomerated into, are purified water to reach while removing iron ion
Purpose.
(3) acid is adjusted：The concentrated sulfuric acid that appropriate mass concentration is 98% is added in the filtrate of step (2), adjusts the pH of filtrate
To 6.0.
(4) low pressure reverse osmosis is handled：The filtrate after acid will be adjusted to be placed in low pressure reverse osmosis device, carried out at low pressure reverse osmosis
The operating pressure of reason, low pressure reverse osmosis processing is 3MPa, and a part of fresh water and a part of concentrated water are obtained after low pressure reverse osmosis,
Fresh water returns to plant area's reuse, is used as industrial water, and concentrated water carries out the high pressure reverse-osmosis treated of next step.
(5) high pressure reverse-osmosis treated：For the concentrated water that low pressure reverse osmosis processing is generated into horizontal high voltage reverse-osmosis treated, high pressure is anti-
The pressure of infiltration processing is 7MPa, and a part of fresh water and a part of concentrated water are obtained after high pressure is reverse osmosis.Fresh water returns to plant area
Reuse is used as industrial water；Concentrated water carries out MVR concentration and evaporations, produces industrial salt.After high pressure reverse-osmosis treated, concentrated water
Salt content is 10%.
(6) MVR concentration and evaporations：The concentrated water generated through high pressure reverse-osmosis treated is performed under reduced pressure MVR evaporations, is obtained
To industrial salt ammonium sulfate, concentrate and condensed water, ammonium sulfate can be used as industrial salt reuse, condensed water that can return to plant area
As industrial water.
The iron cement generated in the treatment process can be used as seed production iron oxide red, and low pressure reverse osmosis and high pressure are reverse osmosis
Production water and the condensed water that generates of MVR concentration and evaporations industrial water can be used as to return to plant area reuse, MVR concentration and evaporations generate
Concentrate can continue return concentration and evaporation system production salt, therefore, the treatment process be one closure system, it is not any
The generation of waste water and solid waste belongs to Zero-discharge treating process.
Embodiment 2：
A kind of mother liquor producing ferric oxide red colorant generation, with following parameter characteristic：PH=2.8, ammonia nitrogen value are
5600mg/L, sulfate radical content 19218mg/L, salt content 2.68%.
A kind of Zero-discharge treating process of iron oxide red mother liquor, the technique include the following steps：
(1) flocculating setting pre-processes：It is 25- that appropriate mass concentration is added in iron oxide red mother liquor under stirring conditions
28% ammonium hydroxide adjusts the pH to 10 of mother liquid coming, and a small amount of PAM solution is then added and carries out flocculating setting to mother liquor, then uses
It is pumped into press filteration system and carries out press filtration, obtain filtrate and iron cement.Obtained iron cement can be used as seed production iron oxide red.
(2) it pre-oxidizes：Appropriate hydrogen peroxide is carried out in the gained filtrate of step (1), by remaining ferrous ion in step (1)
Be oxidized to ferric ion, form ferric hydroxide colloid in alkaline environment, can in adsorbed water body suspension little particle and
Some heavy metal ion, agglomerate into larger particles, to reach the mesh to purify water while removing iron ion
's.
(3) acid is adjusted：The concentrated sulfuric acid that appropriate mass concentration is 98% is added in the filtrate of step (2), adjusts the pH of filtrate
To 7.0.
(4) low pressure reverse osmosis is handled：The filtrate after acid will be adjusted to be placed in low pressure reverse osmosis device, carried out at low pressure reverse osmosis
The operating pressure of reason, low pressure reverse osmosis processing is 4MPa, and a part of fresh water and a part of concentrated water are obtained after low pressure reverse osmosis,
Fresh water returns to plant area's reuse, is used as industrial water, and concentrated water carries out the high pressure reverse-osmosis treated of next step.
(5) high pressure reverse-osmosis treated：For the concentrated water that low pressure reverse osmosis processing is generated into horizontal high voltage reverse-osmosis treated, high pressure is anti-
The pressure of infiltration processing is 6MPa, and a part of fresh water and a part of concentrated water are obtained after high pressure is reverse osmosis.Fresh water returns to plant area
Reuse is used as industrial water；Concentrated water carries out MVR concentration and evaporations, produces industrial salt.After high pressure reverse-osmosis treated, concentrated water
Salt content is 11.2%.
(6) MVR concentration and evaporations：The concentrated water generated through high pressure reverse-osmosis treated is performed under reduced pressure MVR evaporations, is obtained
To industrial salt ammonium sulfate, concentrate and condensed water, ammonium sulfate can be used as industrial salt reuse, condensed water that can return to plant area
As industrial water.
The iron cement generated in the treatment process can be used as seed production iron oxide red, and low pressure reverse osmosis and high pressure are reverse osmosis
Production water and the condensed water that generates of MVR concentration and evaporations industrial water can be used as to return to plant area reuse, MVR concentration and evaporations generate
Concentrate can continue return concentration and evaporation system production salt, therefore, the treatment process be one closure system, it is not any
The generation of waste water and solid waste belongs to Zero-discharge treating process.
Embodiment 3：
A kind of mother liquor producing ferric oxide red colorant generation, with following parameter characteristic：PH=3.5, ammonia nitrogen value are
4200mg/L, sulfate radical content 14560mg/L, salt content 2%.
A kind of Zero-discharge treating process of iron oxide red mother liquor, the technique include the following steps：
(1) flocculating setting pre-processes：It is 25- that appropriate mass concentration is added in iron oxide red mother liquor under stirring conditions
28% ammonium hydroxide adjusts the pH to 9.6 of mother liquid coming, and a small amount of PAM solution is then added and carries out flocculating setting to mother liquid coming, then
Press filtration is carried out with press filteration system is pumped into, obtains filtrate and iron cement.Obtained iron cement can be used as seed production iron oxide red.
(2) it pre-oxidizes：Appropriate hydrogen peroxide is carried out in the gained filtrate of step (1), by remaining ferrous ion in step (1)
Be oxidized to ferric ion, form ferric hydroxide colloid in alkaline environment, can in adsorbed water body suspension little particle and
Some heavy metal ion, agglomerate into larger particles, to reach the mesh to purify water while removing iron ion
's.
(3) acid is adjusted：The concentrated sulfuric acid that appropriate mass concentration is 98% is added in the filtrate of step (2), adjusts the pH of filtrate
To 7.5.
(4) low pressure reverse osmosis is handled：The mother liquid coming after acid will be adjusted to be placed in low pressure reverse osmosis device, carry out low pressure reverse osmosis
The operating pressure of processing, low pressure reverse osmosis processing is 4.5MPa, and a part of fresh water and a part are obtained after low pressure reverse osmosis
Concentrated water, fresh water return to plant area's reuse, are used as industrial water, and concentrated water carries out the high pressure reverse-osmosis treated of next step.
(5) high pressure reverse-osmosis treated：For the concentrated water that low pressure reverse osmosis processing is generated into horizontal high voltage reverse-osmosis treated, high pressure is anti-
The pressure of infiltration processing is 5.5MPa, and a part of fresh water and a part of concentrated water are obtained after high pressure is reverse osmosis.Fresh water returns to factory
Area's reuse is used as industrial water；Concentrated water carries out MVR concentration and evaporations, produces industrial salt.After high pressure reverse-osmosis treated, concentrated water
Salt content be 8.9%.
(6) MVR concentration and evaporations：The concentrated water generated through high pressure reverse-osmosis treated is performed under reduced pressure MVR evaporations, is obtained
To industrial salt ammonium sulfate, concentrate and condensed water, ammonium sulfate can be used as industrial salt reuse, condensed water that can return to plant area
As industrial water.
The iron cement generated in the treatment process can be used as seed production iron oxide red, and low pressure reverse osmosis and high pressure are reverse osmosis
Production water and the condensed water that generates of MVR concentration and evaporations industrial water can be used as to return to plant area reuse, MVR concentration and evaporations generate
Concentrate can continue return concentration and evaporation system production salt, therefore, the treatment process be one closure system, it is not any
The generation of waste water and solid waste belongs to Zero-discharge treating process.
The thought provided according to the present invention, the there will be changes in above-mentioned specific implementation mode, application range, and this
A little change also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind for the treatment of process of iron oxide red mother liquor, which is characterized in that include the following steps：
(1) flocculating setting pre-processes：Alkaline matter is added in iron oxide red mother liquor, flocculating setting is carried out to mother liquor, is then pressed
Filter, obtains filtrate and iron cement；
(2) it pre-oxidizes：A certain proportion of oxidant is added in the filtrate that step (1) obtains or carries out Air Exposure；
(3) acid is adjusted：Appropriate acidic materials are added in filtrate after pre-oxidation, adjust the pH value of filtrate to 4-8；
(4) low pressure reverse osmosis is handled：The filtrate after acid will be adjusted to be placed in low pressure reverse osmosis device, carry out low pressure reverse osmosis processing,
A part of fresh water and a part of concentrated water are obtained after low pressure reverse osmosis, fresh water returns to plant area's reuse, is used as industrial water, concentrated water
It is further processed；
(5) high pressure reverse-osmosis treated：For the concentrated water that low pressure reverse osmosis processing is generated into horizontal high voltage reverse-osmosis treated, high pressure is reverse osmosis
After obtain a part of fresh water and a part of concentrated water, fresh water returns to plant area's reuse, is used as industrial water, and concentrated water carries out in next step
Processing；
(6) MVR concentration and evaporations：The concentrated water generated through high pressure reverse-osmosis treated is subjected to MVR evaporations, obtains salt, concentrate and cold
Condensate.
2. treatment process as described in claim 1, which is characterized in that the alkaline matter described in step (1) is selected from hydroxide
One or more of sodium, potassium hydroxide, ammonium hydroxide adjust the pH value of mother liquor to 9-11.
3. treatment process as described in claim 1, which is characterized in that the iron cement described in step (1) is as crystal seed for giving birth to
Produce iron oxide red.
4. treatment process as described in claim 1, which is characterized in that oxidant described in step (2) is selected from hydrogen peroxide, secondary
One or several kinds in sodium chlorate, chlorine dioxide.
5. treatment process as described in claim 1, which is characterized in that the acidic materials described in step (3) are selected from hydrochloric acid, sulphur
The pH value of filtrate is adjusted to 4-8 by the one or several kinds in acid, nitric acid, phosphoric acid.
6. treatment process as described in claim 1, which is characterized in that the pressure of the low pressure reverse osmosis processing described in step (4)
Power is 2MPa-4.5MPa.
7. treatment process as claimed in claim 6, which is characterized in that the pressure of the low pressure reverse osmosis processing described in step (4)
Power is 3MPa.
8. treatment process as described in claim 1, which is characterized in that the pressure of the high pressure reverse-osmosis treated described in step (5)
Power is 5.5MPa-12.0Mpa.
9. treatment process as claimed in claim 8, which is characterized in that the pressure of the high pressure reverse-osmosis treated described in step (5)
Power is 7MPa.
10. treatment process as described in claim 1, which is characterized in that the salt described in step (6) is nitrogen content 17-
The salt of 21wt%, as industrial salt reuse, concentrate continues to return to concentration and evaporation system production salt, and condensed water is as industrial water
Return to plant area's reuse.
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| CN201711274676.XA CN108314240A (en) | 2017-12-06 | 2017-12-06 | A kind for the treatment of process of iron oxide red mother liquor |
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| CN201711274676.XA CN108314240A (en) | 2017-12-06 | 2017-12-06 | A kind for the treatment of process of iron oxide red mother liquor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109336333A (en) * | 2018-11-14 | 2019-02-15 | 湖南冠颜料有限公司 | A kind of ferric oxide red colorant producing wastewater treatment |
| CN109354072A (en) * | 2018-09-25 | 2019-02-19 | 河南省睿博环境工程技术有限公司 | A kind of alkali round-robin method hamlessizing technology ferric oxide red colorant technique |
| CN115557574A (en) * | 2022-10-20 | 2023-01-03 | 徐州水处理研究所 | Process for recycling ammonium sulfate and ammonium chloride wastewater by full membrane method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475276A (en) * | 2008-12-31 | 2009-07-08 | 莫一平 | Treatment process for ferric oxide production wastewater |
| CN106517632A (en) * | 2016-12-26 | 2017-03-22 | 四川绿沃创新环保工程有限公司 | Concentration device and method for reverse osmosis membrane concentrated ammonium nitrate waste water |
-
2017
- 2017-12-06 CN CN201711274676.XA patent/CN108314240A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475276A (en) * | 2008-12-31 | 2009-07-08 | 莫一平 | Treatment process for ferric oxide production wastewater |
| CN106517632A (en) * | 2016-12-26 | 2017-03-22 | 四川绿沃创新环保工程有限公司 | Concentration device and method for reverse osmosis membrane concentrated ammonium nitrate waste water |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109354072A (en) * | 2018-09-25 | 2019-02-19 | 河南省睿博环境工程技术有限公司 | A kind of alkali round-robin method hamlessizing technology ferric oxide red colorant technique |
| CN109336333A (en) * | 2018-11-14 | 2019-02-15 | 湖南冠颜料有限公司 | A kind of ferric oxide red colorant producing wastewater treatment |
| CN115557574A (en) * | 2022-10-20 | 2023-01-03 | 徐州水处理研究所 | Process for recycling ammonium sulfate and ammonium chloride wastewater by full membrane method |
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Application publication date: 20180724 |