CN105923819A - Cold rolling acid wastewater and diluent alkali wastewater treatment and recovery method and system - Google Patents
Cold rolling acid wastewater and diluent alkali wastewater treatment and recovery method and system Download PDFInfo
- Publication number
- CN105923819A CN105923819A CN201610307137.0A CN201610307137A CN105923819A CN 105923819 A CN105923819 A CN 105923819A CN 201610307137 A CN201610307137 A CN 201610307137A CN 105923819 A CN105923819 A CN 105923819A
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- waste water
- cold rolling
- diluted alkaline
- water
- acid waste
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Classifications
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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
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a cold rolling acid wastewater and diluent alkali wastewater treatment and recovery method. The method comprises the steps of 1, collecting acid wastewater and diluent alkali wastewater respectively and combining acid wastewater and diluent alkali wastewater, and then adjusting PH to enable iron ions to form ferric hydroxide sediment, so that a primary reaction system is obtained; 2, separating supernate wastewater from the primary reacitn system; 3, adding demulsifier and coagulant to the supernate wastewater to enable petroleum type substances to form alumen ustum, so that a secondary reaction system is obtained; 4, treating the secondary reaction system with an air floating device to remove the alumen ustum formed by the petroleum type substances and obtain air floatation water generation clear liquid; 5, filtering the air floatation water generation clear liquid, and recovering water generated after filtration. According to the method, process is simple, water generated after filtration can be directly recycled, and the advantages of cleaner production are reflected; furthermore, the amount of agent added during treatment is small, and the treatment cost of each ton of wastewater is low.
Description
Technical field
The invention belongs to chemical field, relate to a kind of cold rolling acid waste water and diluted alkaline wastewater treatment and renovation side
Method and system.
Background technology
At present, the acid waste water of rolling mill production line generation of steel plant, diluted alkaline waste water, its water quality characteristics
Be that the water yield is big, COD and petroleum hydrocarbons content relatively low, water quality salinity is relatively low, but due to existing
Discharge water quality requirement higher, therefore, it is necessary to could discharge after waste water is processed.
Diluted alkaline waste water is first carried out PH regulation, air supporting pretreatment by existing process technique often, then
With acid waste water merging treatment after biochemical treatment, up to standard after discharge again.Though such processing mode
So waste water processes conjunction rule up to standard, but still suffers from a lot of defect, and its handling process is complicated, processing system
Structures more, equipment is more, therefore invests bigger；And, acid waste water divides with diluted alkaline waste water
Not neutralizing, reagent consumption is higher, and causes the salinity of waste water to improve, and makes waste water directly to reclaim
Utilize, significantly waste water resource.
Producing owing to advocating cleaning at present, the few as far as possible discharge of waste water, many reuses have formed trend, because of
This needs to seek a kind of simple cold rolling acid waste water, the treatment for reuse method of diluted alkaline waste water.
Summary of the invention
It is an object of the invention to provide a kind of cold rolling acid waste water and diluted alkaline wastewater treatment and renovation method and
System, it is intended to seek a kind of cost-effective process technique to solve cold rolling acid waste water and diluted alkaline waste water
Treatment for reuse problem.
For solving above-mentioned technical problem, the technical scheme that the present invention provides is as follows:
The invention provides a kind of cold rolling acid waste water and diluted alkaline wastewater treatment and renovation method, including as follows
Step:
Step one: merge after acid waste water and diluted alkaline waste water are each collected, then regulate pH value, make
Iron ion forms ferric hydroxide precipitate, obtains primary first-order equation system；
Step 2: separate supernatant effluent from described primary first-order equation system；
Step 3: add demulsifier and coagulant in described supernatant effluent, make petroleum substance shape
Become alumen ustum, obtain secondary response system；
Step 4: utilize air-floating apparatus to process described secondary response system, removes petroleum-type thing
The alumen ustum that matter is formed, obtains air supporting and produces water clear liquid；
Step 5: described air supporting is produced water clear liquid and filters, produces water after reclaiming filter.
Further, described step one also includes: after iron ion forms ferric hydroxide precipitate, to waste water
Middle addition flocculant, makes the impurity in waste water form flocculate.
Further, described step one particularly as follows:
Merge after acid waste water and diluted alkaline waste water are each collected and introduce in wastewater equalization pond；
Water reuse water pump in wastewater equalization pond is sent into pH regulator groove, adds in pH regulator groove
Acid or alkali regulation pH value, make iron ion form ferric hydroxide precipitate.
Further, described step 2 specifically includes: described primary first-order equation system is introduced wastewater sedimentation
Pond settles, separates supernatant effluent.
Further, described step 3 specifically includes: described supernatant effluent is introduced Demulsification and coagulant groove
In, it is added thereto to demulsifier and coagulant makes petroleum substance form alumen ustum.
Further, described step 4 particularly as follows: described secondary response system is introduced in air-floating apparatus,
The alumen ustum that Petroleum Wastewater material is formed under the effect of air-floating apparatus is removed, and water clear liquid is produced in air supporting
Enter into air supporting to produce in pond.
Further, described step 5 was particularly as follows: sent into described air supporting product water clear liquid by water pump
Filter filters, after obtaining the filter that can directly recycle, produces water.
Further, described step one all uses PLC automatic program control to the control process of step 5.
Further, in described step one, regulation pH value, to 8.0-9.0, makes iron ion form hydrogen-oxygen
Change ferrum precipitation.
Present invention also offers a kind of cold rolling acid waste water and diluted alkaline wastewater treatment and renovation system, including:
Wastewater equalization pond, pH regulator groove, effluent settling chamber, Demulsification and coagulant groove, air-floating apparatus and filter；
Described wastewater equalization pond carries out merging treatment after acid waste water and diluted alkaline waste water each being collected；
Described pH regulator groove carries out pH value regulation to waste water, makes iron ion form ferric hydroxide precipitate,
Obtain primary first-order equation system；
Described effluent settling chamber carries out settlement treatment to described primary first-order equation system, separates supernatant effluent；
Described supernatant effluent is processed by described Demulsification and coagulant groove, makes petroleum substance form alumen ustum,
Obtain secondary response system；
Described secondary response system is processed by described air-floating apparatus, removes what petroleum substance was formed
Alumen ustum, obtains air supporting and produces water clear liquid；
Described air supporting is produced water clear liquid and is carried out filtration treatment by described filter.
Further, it is provided with pH meter in described pH regulator groove.
Compared with prior art, present invention have an advantage that
The cold rolling acid waste water of one of present invention offer and diluted alkaline wastewater treatment and renovation method, technological process
Simply, the water quality producing water after the filter after process reaches " urban sewage reutilization urban reclaimed water water quality "
(GB/T18920-2002) requirement of standard, can directly in steel mill Reuse on Environment, road punching sweep
Etc. purposes, embody the advantage that cleaning produces；And it is less to add medicament in processing procedure, per ton useless
The processing cost of water is relatively low.The process structures of reclaiming system are few, need equipment and the instrument being equipped with
Less, construction investment is low, and equipment automatization operational degree is high, and operation runs simplicity..
Accompanying drawing explanation
Fig. 1 is a kind of cold rolling acid waste water and the stream of diluted alkaline wastewater treatment and renovation method that the present invention provides
Journey schematic diagram；
Fig. 2 is a kind of cold rolling acid waste water and the knot of diluted alkaline wastewater treatment and renovation system that the present invention provides
Structure schematic diagram.
Wherein, 1-wastewater equalization pond；2-pH regulating tank；3-pH counts；4-effluent settling chamber；5-breakdown of emulsion
Coagulation tank；6-air-floating apparatus；Is produced from pond in 7-air supporting；8-filter.
Detailed description of the invention
The cold rolling acid waste water of the one present invention proposed below in conjunction with the drawings and specific embodiments and diluted alkaline
Wastewater treatment and renovation method and system are described in further detail.According to following explanation and claims,
Advantages and features of the invention will be apparent from.It should be noted that, accompanying drawing all uses the form simplified very much
And all use non-ratio accurately, only in order to facilitate, to aid in illustrating lucidly the mesh of the embodiment of the present invention
's.
As shown in Figure 1-2, it is the cold rolling acid waste water of one that the present invention provides and diluted alkaline waste water processes back
With process chart and the system construction drawing of method, wherein, treatment for reuse method comprises the steps:
The acidic rinse waste water that cold-rolling pickling production line produces is combined into after each collecting with diluted alkaline waste water
In wastewater equalization pond 1, then by water pump, waste water is sent in pH regulator groove 2, set in pH regulator groove
Having pH meter, add acid or alkali regulates pH value to 8.0-9.0 in groove, the iron ion in waste water is by shape
Become the precipitation of hydrated ferric oxide..A small amount of flocculant can also be added in pH regulator groove, make in waste water
Impurity forms flocculate, and the liquid of waste water and solid impurity can be made to be easier to separate；
By the waste water (including sediment fraction and liquid portion) after treatment in above-mentioned pH regulator groove
Introducing in effluent settling chamber 4 and settle, the precipitation that lower floor is mainly hydrated ferric oxide. is miscellaneous with other solids
Matter, upper strata is supernatant effluent, the most also comprises the polluters such as a certain amount of COD, petroleum-type；
Above-mentioned supernatant exhausted water after separating introduces in Demulsification and coagulant groove 5, then put into demulsifier and
Coagulant, makes petroleum substance form oil droplet alumen ustum；
The above-mentioned waste water comprising alumen ustum is introduced in air-floating apparatus 6, under the effect of air-floating apparatus, stone
The alumen ustum that oily substance is formed is removed, and air-float water clear liquid enters into air supporting and produces in pond 7；
Air supporting is produced the air-float water clear liquid in pond 7 pass through water pump introducing filter 8 filters,
Producing water after filter can directly recycling.
Wherein, the regulation related in the processing procedure of whole waste water controls, such as, carry out PH regulation
The control of the dosage etc. of acid adding amount, caustic dosage and demulsifier and the process of calculating by PLC from traverse
Sequence has controlled.
Present invention also offers a kind of cold rolling acid waste water and diluted alkaline wastewater treatment and renovation system,
Wastewater equalization pond 1, pH regulator groove 2, effluent settling chamber 4, Demulsification and coagulant groove 5, air-floating apparatus
6 and filter 8；
Described wastewater equalization pond 1 carries out merging treatment after acid waste water and diluted alkaline waste water each being collected；
Described pH regulator groove 2 carries out pH value regulation to waste water, makes iron ion form ferric hydroxide precipitate,
Obtain primary first-order equation system；It is provided with pH meter 3 in described pH regulator groove 2；
Described effluent settling chamber 4 carries out settlement treatment to described primary first-order equation system, separates supernatant and gives up
Water；
Described supernatant effluent is processed by described Demulsification and coagulant groove 5, makes petroleum substance form vitriol
Flower, obtains secondary response system；
Described secondary response system is processed by described air-floating apparatus 6, removes petroleum substance and is formed
Alumen ustum, obtain air supporting produce water clear liquid；
Described air supporting is produced water clear liquid and is carried out filtration treatment by described filter 8.
The cold rolling acid waste water of one of present invention offer and diluted alkaline wastewater treatment and renovation method, technological process
Simply, the water quality producing water after the filter after process reaches " urban sewage reutilization urban reclaimed water water quality "
(GB/T18920-2002) requirement of standard, can directly in steel mill Reuse on Environment, road punching sweep
Etc. purposes, embody the advantage that cleaning produces；And it is less to add medicament in processing procedure, per ton useless
The processing cost of water is relatively low.The process structures of reclaiming system are few, need equipment and the instrument being equipped with
Less, construction investment is low, and equipment automatization operational degree is high, and operation runs simplicity.
Foregoing description is only the description to present pre-ferred embodiments, not any to the scope of the invention
Limit, any change that the those of ordinary skill in field of the present invention does according to the disclosure above content, modification,
Belong to the protection domain of claims.
Claims (11)
1. a cold rolling acid waste water and diluted alkaline wastewater treatment and renovation method, it is characterised in that include as
Lower step:
Step one: merge after acid waste water and diluted alkaline waste water are each collected, then regulate pH value, make
Iron ion forms ferric hydroxide precipitate, obtains primary first-order equation system；
Step 2: separate supernatant effluent from described primary first-order equation system；
Step 3: add demulsifier and coagulant in described supernatant effluent, make petroleum substance shape
Become alumen ustum, obtain secondary response system；
Step 4: utilize air-floating apparatus to process described secondary response system, removes petroleum-type thing
The alumen ustum that matter is formed, obtains air supporting and produces water clear liquid；
Step 5: described air supporting is produced water clear liquid and filters, produces water after reclaiming filter.
The cold rolling acid waste water of one the most according to claim 1 and diluted alkaline wastewater treatment and renovation method,
It is characterized in that, described step one also includes: after iron ion forms ferric hydroxide precipitate, in waste water
Add flocculant, make the impurity in waste water form flocculate.
The cold rolling acid waste water of one the most according to claim 1 and diluted alkaline wastewater treatment and renovation method,
It is characterized in that, described step one particularly as follows:
Merge after acid waste water and diluted alkaline waste water are each collected and introduce in wastewater equalization pond；
Water reuse water pump in wastewater equalization pond is sent into pH regulator groove, adds in pH regulator groove
Acid or alkali regulation pH value, make iron ion form ferric hydroxide precipitate.
The cold rolling acid waste water of one the most according to claim 1 and diluted alkaline wastewater treatment and renovation method,
It is characterized in that, described step 2 specifically includes: described primary first-order equation system is introduced effluent settling chamber
In settle, separate supernatant effluent.
The cold rolling acid waste water of one the most according to claim 1 and diluted alkaline wastewater treatment and renovation method,
It is characterized in that, described step 3 specifically includes: introduced by described supernatant effluent in Demulsification and coagulant groove,
It is added thereto to demulsifier and coagulant makes petroleum substance form alumen ustum.
The cold rolling acid waste water of one the most according to claim 1 and diluted alkaline wastewater treatment and renovation method,
It is characterized in that, described step 4 particularly as follows:
Described secondary response system is introduced in air-floating apparatus, stone in waste water under the effect of air-floating apparatus
The alumen ustum that oily substance is formed is removed, and air supporting is produced water clear liquid and entered in air supporting product pond.
The cold rolling acid waste water of one the most according to claim 1 and diluted alkaline wastewater treatment and renovation method,
It is characterized in that, described step 5 sends into filtration particularly as follows: described air supporting is produced water clear liquid by water pump
Device filters, after obtaining the filter that can directly recycle, produces water.
The cold rolling acid waste water of one the most according to claim 1 and diluted alkaline wastewater treatment and renovation method,
It is characterized in that, the control process of described step one to step 5 all uses PLC automatic program control.
9. process according to the cold rolling acid waste water of one described in any one of claim 1-8 and diluted alkaline waste water
Reuse method, it is characterised in that in described step one, regulation pH value, to 8.0-9.0, makes iron ion
Form ferric hydroxide precipitate.
10. a cold rolling acid waste water and diluted alkaline wastewater treatment and renovation system, it is characterised in that including:
Wastewater equalization pond, pH regulator groove, effluent settling chamber, Demulsification and coagulant groove, air-floating apparatus and filter；
Described wastewater equalization pond carries out merging treatment after acid waste water and diluted alkaline waste water each being collected；
Described pH regulator groove carries out pH value regulation to waste water, makes iron ion form ferric hydroxide precipitate,
Obtain primary first-order equation system；
Described effluent settling chamber carries out settlement treatment to described primary first-order equation system, separates supernatant effluent；
Described supernatant effluent is processed by described Demulsification and coagulant groove, makes petroleum substance form alumen ustum,
Obtain secondary response system；
Described secondary response system is processed by described air-floating apparatus, removes what petroleum substance was formed
Alumen ustum, obtains air supporting and produces water clear liquid；
Described air supporting is produced water clear liquid and is carried out filtration treatment by described filter.
The 11. cold rolling acid waste waters of one according to claim 10 and diluted alkaline wastewater treatment and renovation system
System, it is characterised in that be provided with pH meter in described pH regulator groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610307137.0A CN105923819A (en) | 2016-05-10 | 2016-05-10 | Cold rolling acid wastewater and diluent alkali wastewater treatment and recovery method and system |
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| CN201610307137.0A CN105923819A (en) | 2016-05-10 | 2016-05-10 | Cold rolling acid wastewater and diluent alkali wastewater treatment and recovery method and system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106745960A (en) * | 2016-11-25 | 2017-05-31 | 江苏省沙钢钢铁研究院有限公司 | Comprehensive utilization method of steelmaking refining fly ash |
| CN108328826A (en) * | 2017-01-20 | 2018-07-27 | 宝山钢铁股份有限公司 | A kind of method of cold-rolling pickling wastewater recycling |
| CN108793542A (en) * | 2017-04-28 | 2018-11-13 | 宝山钢铁股份有限公司 | A kind of method that cold rolling acid waste water cooperates with processing with alkaline waste water |
| CN109369335A (en) * | 2018-12-06 | 2019-02-22 | 南通市康桥油脂有限公司 | A collaborative separation and purification process for oil hydrolysis of glycerol |
| CN113200626A (en) * | 2021-05-18 | 2021-08-03 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for treating chromium-free coating wastewater of iron and steel enterprises |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106745960A (en) * | 2016-11-25 | 2017-05-31 | 江苏省沙钢钢铁研究院有限公司 | Comprehensive utilization method of steelmaking refining fly ash |
| CN106745960B (en) * | 2016-11-25 | 2020-11-13 | 江苏省沙钢钢铁研究院有限公司 | A method for comprehensive utilization of steel refining dust removal dust |
| CN108328826A (en) * | 2017-01-20 | 2018-07-27 | 宝山钢铁股份有限公司 | A kind of method of cold-rolling pickling wastewater recycling |
| CN108793542A (en) * | 2017-04-28 | 2018-11-13 | 宝山钢铁股份有限公司 | A kind of method that cold rolling acid waste water cooperates with processing with alkaline waste water |
| CN109369335A (en) * | 2018-12-06 | 2019-02-22 | 南通市康桥油脂有限公司 | A collaborative separation and purification process for oil hydrolysis of glycerol |
| CN109369335B (en) * | 2018-12-06 | 2022-04-05 | 南通市康桥油脂有限公司 | A collaborative separation and purification process for oil hydrolysis of glycerol |
| CN113200626A (en) * | 2021-05-18 | 2021-08-03 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for treating chromium-free coating wastewater of iron and steel enterprises |
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Application publication date: 20160907 |