CN108531919A - A kind of acid washing rolled steel liquid-tight road circulation producing method - Google Patents
A kind of acid washing rolled steel liquid-tight road circulation producing method Download PDFInfo
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- CN108531919A CN108531919A CN201810367850.3A CN201810367850A CN108531919A CN 108531919 A CN108531919 A CN 108531919A CN 201810367850 A CN201810367850 A CN 201810367850A CN 108531919 A CN108531919 A CN 108531919A
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- hydrochloric acid
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- rolled steel
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- acid washing
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/36—Regeneration of waste pickling liquors
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- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention relates to a kind of acid washing rolled steel liquid-tight road circulation producing methods, including pickling hydrochloric acid to recycle, the iron solution pretreatment of protochloride, four steps such as adverse current calcining and exhaust emissions.One aspect of the present invention device structure is simple, compact in design, versatility is good, the flexibility and convenience that equipment uses can effectively be improved, reduce equipment installation, build and when operation by site influence, and reduce the installation of equipment, construction and operation and maintain cost, on the other hand can effectively realize in acid cleaning process chlorine element and ferro element effectively recycled, to greatly improve resource comprehensive utilization utilization rate, and achieve the purpose that reduce acid washing rolled steel job run material loss and cost.
Description
Technical field
The present invention relates to a kind of acid washing rolled steel liquid-tight road circulation producing method, belongs to environmental technology field.
Background technology
With being constantly progressive for human society, commercial production scale increases rapidly, and the speed of environmental improvement lags far behind
In the speed of environmental pollution, and the expense for pollution control constantly rises.The ecological environment of the earth is with industrial
It is constantly progressive and deteriorates rapidly, seriously threatened the existence of the mankind.Therefore, basic solution only has one, here it is
The production model for thoroughly changing traditional industry advocates greenization production, prevents pollution from pollution source, walks sustainable development
Road.Traditional chemical technique only is substituted with " green chemistry process ", implements the clean manufacturing of chemical industry, has been possible to
The full looks for changing chemical industry, make chemical industry realize leapfrogging growth.
In industrial processes, all there is hydrochloric acid leaching ore in a variety of industries, extract the element or compound of needs,
Such as：Titanium dioxide industry hydrochloric acid method titanium white production technique reacts generation chlorine oxygen titanium with concentrated hydrochloric acid with ilmenite and frerrous chloride is molten
Liquid, when pickling steel, can form the waste water of a large amount of chloride containing ferrous iron, this frerrous chloride waste water is the serious pollution of discharge to live all
Environment is in recent years environmental protection, some enterprises handle frerrous chloride waste water.
There are mainly three types of methods for the processing of frerrous chloride waste water：Simple neutralization method, negative pressure evaporation technique and directly burning
Technology.Comparatively, neutralization method, not only consumes a large amount of alkaline matter, and waste recyclable recycling in waste hydrochloric acid
Hydrochloric acid, National Environmental Protection Agency has prohibited.In addition to this, because containing heavy metal ion in spent acid, it also can not meet ring
Protect the standard of qualified discharge.Negative pressure evaporation technique, although can simply be recycled to waste hydrochloric acid, there is operations
The shortcomings of efficiency is low, energy consumption is higher, and obtained frerrous chloride product marketing is unsmooth, recycling hydrochloric acid content is few.Equally, it directly burns useless
Salt technic acid is recycled although more hydrochloric acid can be recycled, and the sale of by-product iron oxide powder, storage and transportation are convenient.However,
There is investments, and concentration of hydrochloric acid that is big, high energy consumption, taking up a large area, produce is low, it is also necessary to increase new concentrated hydrochloric acid and carry out
Allotment, while the necessarily disadvantages such as excessive dilute hydrochloric acid of discharge a certain amount.
Chinese patent application CN 01138382.8 discloses a kind of technique of crystallisation processing hydrochloric acid pickling waste liquor, special
Sign is that it includes the following steps：Acid pickle is transported to vaporization chamber with pump, the vacuum degree of system is 550-650mmHg, is opened
Steam valve makes heater begin to warm up evaporation acid pickle, under the double action of gravity and heating power, acid pickle in heater and
Circulating-heating is concentrated by evaporation between vaporization chamber, and evaporation concentrated solution is added in crystallization kettle, and the crystalline solid of frerrous chloride is obtained through cooling,
Laggard centrifuge separation, obtain solid chlorine ferrous iron crystal, mother liquor returns to spent acid pond.The dilute hydrochloric acid of this method recycling, needs
Increase concentrated hydrochloric acid allotment.
Chinese patent CN 01108273.9 discloses a kind of processing method of hydrochlorate pickled plate waste liquid, and waste liquid is main
Ingredient is hydrochloric acid and frerrous chloride, it is characterised in that：Waste liquid enters climbing film evaporator and is evaporated, and is steamed by falling film evaporator
The HCl gas that hair, climbing film evaporator and falling film evaporator generate becomes recycling hydrochloric acid, falling film evaporation after condenser cools down
The high temperature raffinate that device generates obtains frerrous chloride solid after supercooling, separation.The dilute hydrochloric acid of this method recycling, needs to increase dense
Hydrochloric acid is allocated.
Above-mentioned two inventions include the current existing invention that can be found and data, are ground by target of pollution administration
Hair technology, not from solving the problems, such as at all.
Therefore, there is an urgent need to research and develop a kind of new technology, energy consumption is small, small investment；The hydrochloric acid of production process all recycles, simultaneously
And byproduct is also brown iron oxide, and steel hydrochloric acid pickling technique is made to form the full seam loop circulating device and technique of green, it is really real
" green chemistry process " of existing pickling industry.
Invention content
In order to solve some shortcomings on existing sorting technique, the present invention provides a kind of acid washing rolled steel liquid closed cycle production
Method.
A kind of acid washing rolled steel liquid-tight road circulation producing method, includes the following steps：
The first step, pickling hydrochloric acid recycle, and the pickle in acid washing rolled steel slot is pumped up into heating tower, and the liquid after heating is through pump
It is sent to waste heat thickener, the liquid after concentration squeezes into spray drying system by pumping, and the tail gas after drying is through whirlwind powder collector, cloth bag
Powder collector, heating tower enter absorption by Hydrochloric Acid system, hydrochloric acid are detached with solution of ferrous chloride, then by the chlorination after separation
Ferrous iron solution storage is spare, and the hydrochloric acid after separation is returned to acid washing rolled steel slot, realizes hydrochloric acid cycle applications；
Second step, the iron solution pretreatment of protochloride, directly transports carrying out the isolated iron solution of protochloride of the first step
To calcining tower, it is Fe2O3 and HCI gases that the iron solution pyrolytic of protochloride is made in calcining tower, is obtained through whirlwind powder collector
To Fe2O3 products, while the high-temperature tail gas of the gas containing HCI being entered in spray drying Tower System and is handled；
Third walks, and adverse current is calcined, first after the high-temperature tail gas of the gas containing HCI that second step obtains enters in spray drying Tower System
First received by tower bottom, whirlwind powder collector, cloth bag at aqueous frerrous chloride powder by spray drying system drying solution of ferrous chloride
Powder device is sent to calcining tower through Blowing stopper, screw conveyor respectively, forms material adverse current and calcines；
4th step, exhaust emissions, complete third step after, by the high-temperature tail gas of the remaining gas containing HCI first in the tower that heats up into
Then row heat exchange is re-introduced into the absorption by Hydrochloric Acid system of the first step, on the one hand will system after two-stage fair current absorption by Hydrochloric Acid
Standby obtained hydrochloric acid returns in acid washing rolled steel slot, and remaining tail gas is transported in alkali liquid washing tower and carries out alkali liquid washing, most
It will be discharged afterwards through system high pressure air-introduced machine by the tail gas of washing.
Further, in the first step, Fe in acid washing rolled steel slot2+When concentration reaches 100mg/L -150mg/L, then
Pickle is transported in heating tower and is handled.
Further, the first step neutralize in the 4th step back to the concentration of hydrochloric acid in acid washing rolled steel slot be 20%~
25%。
One aspect of the present invention device structure is simple, compact in design, and versatility is good, can effectively improve equipment use it is flexible
Property and convenience, reduce equipment installation, build and when operation by site influence, and reduce the installation of equipment, construction and operation dimension
Hold cost, on the other hand can effectively realize in acid cleaning process chlorine element and ferro element effectively recycled, to
Resource comprehensive utilization utilization rate is greatly improved, and achievees the purpose that reduce acid washing rolled steel job run material loss and cost.
Description of the drawings
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments；
Fig. 1 is the method for the present invention flow diagram；
Fig. 2 is present invention process flow chart.
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to specific
Embodiment, the present invention is further explained.
The first step as described in Fig. 1 and 2, pickling hydrochloric acid recycle, and the pickle in acid washing rolled steel slot is pumped up into heating
Tower, the liquid after heating are pumped up toward waste heat thickener, and the liquid after concentration squeezes into spray drying system by pumping, the tail after drying
Gas enters absorption by Hydrochloric Acid system through whirlwind powder collector, cloth bag collection machine, heating tower, and hydrochloric acid and solution of ferrous chloride are divided
From, it is then that the iron solution storage of protochloride after separation is spare, the hydrochloric acid after separation is returned into acid washing rolled steel slot, realizes salt
Sour cycle applications；
Second step, the iron solution pretreatment of protochloride, directly transports carrying out the isolated iron solution of protochloride of the first step
To calcining tower, it is Fe2O3 and HCI gases that the iron solution pyrolytic of protochloride is made in calcining tower, is obtained through whirlwind powder collector
To Fe2O3 products, while the high-temperature tail gas of the gas containing HCI being entered in spray drying Tower System and is handled；
Third walks, and adverse current is calcined, first after the high-temperature tail gas of the gas containing HCI that second step obtains enters in spray drying Tower System
First received by tower bottom, whirlwind powder collector, cloth bag at aqueous frerrous chloride powder by spray drying system drying solution of ferrous chloride
Powder device is sent to calcining tower through Blowing stopper, screw conveyor respectively, forms material adverse current and calcines；
4th step, exhaust emissions, complete third step after, by the high-temperature tail gas of the remaining gas containing HCI first in the tower that heats up into
Then row heat exchange is re-introduced into the absorption by Hydrochloric Acid system of the first step, on the one hand will system after two-stage fair current absorption by Hydrochloric Acid
Standby obtained hydrochloric acid returns in acid washing rolled steel slot, and remaining tail gas is transported in alkali liquid washing tower and carries out alkali liquid washing, most
It will be discharged afterwards through system high pressure air-introduced machine by the tail gas of washing.
In the present embodiment, in the first step, Fe in acid washing rolled steel slot2+When concentration reaches 100mg/L -150mg/L,
Pickle is transported in heating tower again and is handled.
In the present embodiment, it is 20% that the first step, which neutralizes the concentration of hydrochloric acid returned in the 4th step in acid washing rolled steel slot,
~25%.
One aspect of the present invention device structure is simple, compact in design, and versatility is good, can effectively improve equipment use it is flexible
Property and convenience, reduce equipment installation, build and when operation by site influence, and reduce the installation of equipment, construction and operation dimension
Hold cost, on the other hand can effectively realize in acid cleaning process chlorine element and ferro element effectively recycled, to
Resource comprehensive utilization utilization rate is greatly improved, and achievees the purpose that reduce acid washing rolled steel job run material loss and cost.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (3)
1. a kind of acid washing rolled steel liquid-tight road circulation producing method, it is characterised in that：The acid washing rolled steel liquid closed cycle production
Method includes the following steps：
The first step, pickling hydrochloric acid recycle, and the pickle in acid washing rolled steel slot is pumped up into heating tower, and the liquid after heating is through pump
It is sent to waste heat thickener, the liquid after concentration squeezes into spray drying system by pumping, and the tail gas after drying is through whirlwind powder collector, cloth bag
Powder collector, heating tower enter absorption by Hydrochloric Acid system, hydrochloric acid are detached with solution of ferrous chloride, then by the chlorination after separation
Ferrous iron solution storage is spare, and the hydrochloric acid after separation is returned to acid washing rolled steel slot, realizes hydrochloric acid cycle applications；
Second step, the iron solution pretreatment of protochloride, directly transports carrying out the isolated iron solution of protochloride of the first step
To calcining tower, it is Fe2O3 and HCI gases that the iron solution pyrolytic of protochloride is made in calcining tower, is obtained through whirlwind powder collector
To Fe2O3 products, while the high-temperature tail gas of the gas containing HCI being entered in spray drying Tower System and is handled；
Third walks, and adverse current is calcined, first after the high-temperature tail gas of the gas containing HCI that second step obtains enters in spray drying Tower System
First received by tower bottom, whirlwind powder collector, cloth bag at aqueous frerrous chloride powder by spray drying system drying solution of ferrous chloride
Powder device is sent to calcining tower through Blowing stopper, screw conveyor respectively, forms material adverse current and calcines；
4th step, exhaust emissions, complete third step after, by the high-temperature tail gas of the remaining gas containing HCI first in the tower that heats up into
Then row heat exchange is re-introduced into the absorption by Hydrochloric Acid system of the first step, on the one hand will system after two-stage fair current absorption by Hydrochloric Acid
Standby obtained hydrochloric acid returns in acid washing rolled steel slot, and remaining tail gas is transported in alkali liquid washing tower and carries out alkali liquid washing, most
It will be discharged afterwards through system high pressure air-introduced machine by the tail gas of washing.
2. magnesium oxide method desulfurizing and drying all-in-one machine according to claim 1, it is characterised in that：In the first step, steel
Fe in descaling bath2+When concentration reaches 100mg/L -150mg/L, then pickle is transported in heating tower and is handled.
3. magnesium oxide method desulfurizing and drying all-in-one machine according to claim 1, it is characterised in that：The first step neutralizes the 4th
The concentration of hydrochloric acid returned in step in acid washing rolled steel slot is 20%~25%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810367850.3A CN108531919B (en) | 2018-04-23 | 2018-04-23 | A kind of acid washing rolled steel liquid-tight road circulation producing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810367850.3A CN108531919B (en) | 2018-04-23 | 2018-04-23 | A kind of acid washing rolled steel liquid-tight road circulation producing method |
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| CN108531919A true CN108531919A (en) | 2018-09-14 |
| CN108531919B CN108531919B (en) | 2019-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111960473A (en) * | 2020-09-23 | 2020-11-20 | 沈阳宇能机械工程科技有限公司 | Integrated device and method for treating waste liquid of ferrous chloride hydrochloric acid solution |
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|---|---|---|---|---|
| CN1851320A (en) * | 2006-04-28 | 2006-10-25 | 中冶南方工程技术有限公司 | Hydrochloride waste regenerating process for spray roasting |
| CN101307456A (en) * | 2007-04-25 | 2008-11-19 | 黄健 | Pickling waste acid regeneration process |
| CN101786606A (en) * | 2009-12-11 | 2010-07-28 | 北京天泰兴工程科技有限公司 | Process for recycling iron/steel acid-washing waste hydrochloric acid through evaporation burning and coupling process |
| CN102674250A (en) * | 2012-04-28 | 2012-09-19 | 佛山津西金兰冷轧板有限公司 | Waste acid recovery and treatment device |
| CN102689930A (en) * | 2011-03-24 | 2012-09-26 | 镇江市丹徒区江南热镀锌有限公司 | Hydrochloric acid pickling waste liquid resource integrated utilization method for preparing iron oxide and ammonium sulfate |
-
2018
- 2018-04-23 CN CN201810367850.3A patent/CN108531919B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851320A (en) * | 2006-04-28 | 2006-10-25 | 中冶南方工程技术有限公司 | Hydrochloride waste regenerating process for spray roasting |
| CN101307456A (en) * | 2007-04-25 | 2008-11-19 | 黄健 | Pickling waste acid regeneration process |
| CN101786606A (en) * | 2009-12-11 | 2010-07-28 | 北京天泰兴工程科技有限公司 | Process for recycling iron/steel acid-washing waste hydrochloric acid through evaporation burning and coupling process |
| CN102689930A (en) * | 2011-03-24 | 2012-09-26 | 镇江市丹徒区江南热镀锌有限公司 | Hydrochloric acid pickling waste liquid resource integrated utilization method for preparing iron oxide and ammonium sulfate |
| CN102674250A (en) * | 2012-04-28 | 2012-09-19 | 佛山津西金兰冷轧板有限公司 | Waste acid recovery and treatment device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111960473A (en) * | 2020-09-23 | 2020-11-20 | 沈阳宇能机械工程科技有限公司 | Integrated device and method for treating waste liquid of ferrous chloride hydrochloric acid solution |
| CN111960473B (en) * | 2020-09-23 | 2024-03-29 | 沈阳宇能机械工程科技有限公司 | Waste liquid treatment integrated equipment and treatment method for ferrous chloride hydrochloric acid solution |
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| CN108531919B (en) | 2019-12-03 |
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