CN112499589A - Acid regeneration water-to-acid mode acid mist chimney red smoke emission treatment method - Google Patents
Acid regeneration water-to-acid mode acid mist chimney red smoke emission treatment method Download PDFInfo
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- CN112499589A CN112499589A CN202011528873.1A CN202011528873A CN112499589A CN 112499589 A CN112499589 A CN 112499589A CN 202011528873 A CN202011528873 A CN 202011528873A CN 112499589 A CN112499589 A CN 112499589A
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- 239000002253 acid Substances 0.000 title claims abstract description 151
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008929 regeneration Effects 0.000 title claims abstract description 22
- 238000011069 regeneration method Methods 0.000 title claims abstract description 22
- 239000003595 mist Substances 0.000 title claims abstract description 21
- 239000000779 smoke Substances 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000007789 gas Substances 0.000 claims abstract description 48
- 239000002699 waste material Substances 0.000 claims abstract description 47
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000010521 absorption reaction Methods 0.000 claims abstract description 33
- 238000005406 washing Methods 0.000 claims abstract description 32
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000002912 waste gas Substances 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 28
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 18
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 238000004064 recycling Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims 1
- 239000000460 chlorine Substances 0.000 claims 1
- 229910052801 chlorine Inorganic materials 0.000 claims 1
- 239000011859 microparticle Substances 0.000 claims 1
- 239000008237 rinsing water Substances 0.000 claims 1
- 238000005554 pickling Methods 0.000 abstract description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 8
- 239000003546 flue gas Substances 0.000 abstract description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000006386 neutralization reaction Methods 0.000 abstract description 3
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 230000001172 regenerating effect Effects 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- -1 iron ions Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
- C01B7/07—Purification ; Separation
- C01B7/0706—Purification ; Separation of hydrogen chloride
- C01B7/0712—Purification ; Separation of hydrogen chloride by distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/06—Ferric oxide [Fe2O3]
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of industrial waste recycling and environmental protection, and particularly discloses a method for treating red smoke emitted from an acid regeneration water-to-acid mode acid mist chimney, waste acid generated by a pickling line is evaporated and concentrated through a Venturi preconcentrator, then the concentrated acid is converted into an atomized state through an acid gun and is sprayed into a roasting furnace, the waste acid reacts in the furnace to generate hydrogen oxide gas and ferric oxide powder, the hydrogen oxide gas and the ferric oxide powder are dedusted from the top of the roasting furnace through a double-cyclone deduster, flue gas such as high-temperature hydrogen chloride, the ferric oxide powder and the like is subjected to heat exchange through the Venturi preconcentrator, and then the flue gas is sprayed and absorbed by an absorption tower; meanwhile, after the generated waste gas is subjected to measures such as neutralization of a washing tower, water spraying and cooling, the finally generated gas meeting the environmental protection requirement is discharged into the air from a chimney, and indexes of hydrogen chloride and ferric oxide powder meeting the national emission standard in the discharge are required.
Description
Technical Field
The invention relates to the technical field of industrial waste recycling and environmental protection, in particular to a red smoke treatment method for an acid mist chimney in an acid regeneration water-to-acid conversion mode.
Background
In a cold rolling pickling plant, when a steel sheet is pickled with hydrochloric acid, iron oxide on the surface of the sheet is washed away with hydrochloric acid to form ferrous chloride or ferric chloride is dissolved in a pickling solution, and the concentration of iron ions in the pickling solution increases with the progress of the pickling process, while the concentration of free hydrogen chloride decreases accordingly. In order to maintain the concentration of free hydrogen chloride in the acid pickling solution, the increased iron ions in the acid pickling solution are removed, and the waste acid solution is quantitatively sent to an acid regeneration device to be regenerated into free acid to return to an acid pickling unit, so that iron oxide powder is obtained. The hydrochloric acid regenerating unit is an environment-friendly facility which eliminates the corrosion and pollution of waste acid, waste acid water and acid steam and turns the harm into the benefit. The waste acid regenerating device can recover hydrochloric acid and can generate a byproduct of ferric oxide, and the ferric oxide powder can be used as high-purity ferric oxide of soft magnetic materials.
The waste hydrochloric acid regenerating device is widely applied to the regeneration of plate pickling waste acid before cold rolling in the steel industry, but the phenomenon of red smoke appears in different degrees in the actual use process of the device, and if the operation is not proper or the device fails, the emission concentration of hydrogen chloride easily exceeds the national emission standard.
Disclosure of Invention
The invention aims to provide a method for treating red smoke emitted by an acid mist chimney in a mode of converting acid regenerated water into acid, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method for treating red smoke emitted by an acid regeneration water-to-acid mode acid mist chimney comprises the following steps:
s1: conveying waste acid generated on an acid regeneration production line into a Venturi preconcentrator through a waste acid pump for evaporation and concentration treatment, conveying part of the concentrated waste acid into the Venturi preconcentrator through a Venturi circulating pump for circulating spraying work, and guiding part of the waste acid into a concentrated acid filter for filtering under the action of an acid supply pump of a roasting furnace;
s2: waste acid filtered by the concentrated acid filter enters a roasting furnace, is atomized by an acid gun and then is sprayed into the furnace for evaporation, waste gas generated by acid mist evaporation in the roasting furnace is discharged from the top of the roasting furnace to a double-cyclone separator for dust removal, and the dust-removed waste gas is discharged from the double-cyclone separator to a Venturi preconcentrator;
s3: the waste gas directly enters an absorption tower after coming out of the Venturi preconcentrator, and then enters the absorption tower to be sprayed and absorbed to form regenerated acid, and the regenerated acid flows out of the bottom of the absorption tower and then is stored and recycled;
s: the mixed gas which is not absorbed in the absorption tower escapes from the top of the absorption tower, enters the washing tower under the action of the waste gas fan, and is washed, absorbed and purified, so that the waste gas which reaches the emission standard is discharged to the atmosphere from a chimney at the top of the washing tower.
As a preferable scheme of the invention, after the waste acid enters the Venturi preconcentrator through the waste acid pump, the waste acid continuously circularly flows in the Venturi preconcentrator under the action of the Venturi circulating pump, and hot air entering from the top of the Venturi preconcentrator and treated by the double cyclone separators exchanges heat with circulating acid, so that water in the waste acid is evaporated, and the concentration of the waste acid is increased.
In a preferred embodiment of the present invention, after the exhaust gas enters the venturi preconcentrator, the exhaust gas directly contacts with the circulating acid with a low temperature inside the venturi preconcentrator, so that the temperature of the exhaust gas is reduced, and the content of iron oxide powder in the exhaust gas is reduced.
In a preferable scheme of the invention, the dust generated in the waste gas dedusting process of the double cyclone separator is reintroduced into the roasting furnace for recycling through a pipeline at the bottom of the double cyclone separator.
As a preferred scheme of the invention, hot air generated by a burner in the roasting furnace enables waste acid atomized solution to perform a sufficient endothermic reaction in the furnace, and waste acid liquid drops are rapidly evaporated in the falling process to generate hydrochloric acid gas and iron oxide powder; after the ferric oxide powder solid falls into the lower cone of the roasting furnace and is crushed by the crusher, the rotary valve is opened to discharge the ferric oxide powder.
In a preferred embodiment of the present invention, the washing column is configured to wash the off-gas with desalted water in a circulating manner at the top of the column, and the gas is fed from the bottom of the absorption column, and the contents of hydrogen chloride gas and chlorine gas in the off-gas are reduced and fine particles of iron oxide in the gas are removed in a counter-current process.
In a preferred embodiment of the present invention, the rinse water in the washing tower is discharged from the bottom thereof to a collection water tank, the rinse water in the collection water tank is introduced into the absorption tower by an absorption tower pump, the desalted water is added from the bottom of the washing tower, and the desalted water in the washing tower is recycled by cooperation with a washing tower circulating pump communicated with the bottom of the washing tower.
As a preferable scheme of the invention, the circulation pump of the washing tower introduces part of desalted water into the waste gas fan, so that the mixed gas can be cleaned by the desalted water while passing through the waste gas fan; and the desalted water after being cleaned enters a water collecting tank for collection.
In a preferred embodiment of the present invention, the absorption tower absorbs hydrogen chloride gas in the exhaust gas using desalted water and rinse water, and the hydrogen chloride gas is dissolved in water to form a regenerated acid.
Compared with the prior art, the invention has the beneficial effects that:
the method for treating red smoke emitted by the acid regeneration water-to-acid mode acid mist chimney can evaporate and concentrate waste acid generated by a pickling line through a Venturi preconcentrator, then convert the concentrated acid into an atomized state through an acid gun and spray the atomized acid into a roasting furnace, the concentrated acid reacts in the furnace to generate hydrogen oxide gas and ferric oxide powder, the hydrogen oxide gas and the ferric oxide powder are dedusted by a double-cyclone deduster from the top of the roasting furnace, flue gas such as high-temperature hydrogen chloride, the ferric oxide powder and the like is subjected to heat exchange through the Venturi preconcentrator, and then the flue gas is sprayed and absorbed by an absorption tower through a flue gas pipeline to generate; meanwhile, after the generated waste gas is subjected to measures such as neutralization of a washing tower, water spraying and cooling, the finally generated gas meeting the environmental protection requirement is discharged into the air from a chimney, and indexes of hydrogen chloride and ferric oxide powder meeting the national emission standard in the discharge are required.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. roasting furnace; 2. a dual cyclone separator; 3. a venturi preconcentrator; 4. an absorption tower; 5. a waste gas fan; 6. a washing tower; 7. a chimney; 8. a crusher; 9. rotating the valve; 10. a concentrated acid filter; 11. a water collecting tank; 12. an acid supply pump of the roasting furnace; 13. a venturi circulation pump; 14. a waste acid pump; 15. an absorber pump; 16. and a washing tower circulating pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, the present invention provides a technical solution: a method for treating red smoke emitted by an acid regeneration water-to-acid mode acid mist chimney comprises the following steps:
s1: waste acid generated on an acid regeneration production line is conveyed into a Venturi preconcentrator 3 through a waste acid pump 14 for evaporation and concentration treatment, part of the concentrated waste acid is conveyed into the Venturi preconcentrator 3 through a Venturi circulating pump 13 for circulating spraying work, and part of the waste acid is guided into a concentrated acid filter 10 for filtering under the action of an acid supply pump 12 of a roasting furnace;
s2: waste acid filtered by the concentrated acid filter 10 enters a roasting furnace 1, is atomized by an acid gun and then is sprayed into the furnace for evaporation, waste gas generated by acid mist evaporation in the roasting furnace 1 is discharged from the top of the roasting furnace 1 to a double-cyclone separator 2 for dust removal, and the waste gas after dust removal is discharged from the double-cyclone separator 2 to a venturi preconcentrator 3;
s3: the waste gas directly enters the absorption tower 4 after coming out of the Venturi preconcentrator 3, and enters the absorption tower 4 for spraying and absorption to form regenerated acid, and the regenerated acid flows out of the bottom of the absorption tower 4 and then is stored and recycled;
s4: the mixed gas which is not absorbed in the absorption tower 4 escapes from the top of the absorption tower 4, enters the washing tower 6 under the action of the waste gas fan 5, and is washed, absorbed and purified, and the waste gas which reaches the emission standard is discharged to the atmosphere from a chimney 7 at the top of the washing tower 6.
Further, after the waste acid enters the venturi preconcentrator 3 through the waste acid pump 14, the waste acid continuously circularly flows in the venturi preconcentrator 3 under the action of the venturi circulating pump 13, and hot air entering from the top of the venturi preconcentrator 3 and treated by the double cyclone separators 2 exchanges heat with circulating acid, so that water in the waste acid is evaporated, and the concentration of the waste acid is increased.
Further, after the exhaust gas enters the venturi preconcentrator 3, the exhaust gas directly contacts with the circulating acid with lower temperature in the venturi preconcentrator 3, the temperature of the exhaust gas is reduced, and meanwhile, the content of iron oxide powder in the exhaust gas is reduced.
Furthermore, the dust generated in the exhaust gas dedusting process of the double cyclone separator 2 is reintroduced into the roasting furnace 1 through a pipeline at the bottom of the double cyclone separator 2 for recycling.
Further, hot air generated by a burner in the roasting furnace 1 enables waste acid atomized solution to perform a sufficient endothermic reaction in the furnace, and waste acid liquid drops are rapidly evaporated in the falling process to generate hydrochloric acid gas and iron oxide powder; after the iron oxide powder solids fall into the lower cone of the roasting furnace 1 and are crushed by the crusher 8, the rotary valve 9 is opened to discharge the iron oxide powder solids.
Furthermore, the washing tower 6 circularly washes the tail gas by desalted water at the tower top, the gas is fed from the bottom of the absorption tower 4, and in the countercurrent process, the content of hydrogen chloride gas and chlorine gas in the tail gas is reduced, and meanwhile, the fine particles of the iron oxide powder in the gas are removed.
Furthermore, the rinse water in the washing tower 6 is discharged to the collecting water tank 11 from the bottom thereof, the rinse water in the collecting water tank 11 is introduced into the absorption tower 4 by the absorption tower pump 15, desalted water is added from the bottom of the washing tower 6, and the desalted water in the washing tower 6 is recycled by matching with a washing tower circulating pump 16 communicated with the bottom of the washing tower 6.
Further, the scrubber circulation pump 16 introduces part of desalted water into the exhaust gas fan 5, so that the mixed gas passes through the exhaust gas fan 5 and is cleaned by the desalted water; the desalted water after being cleaned enters a water collecting tank 11 for collection.
Furthermore, the absorption tower 4 adopts desalted water and rinse water to absorb hydrogen chloride gas in the waste gas, and the hydrogen chloride gas is dissolved in water to form regenerated acid.
The working principle is as follows: the method for treating red smoke emitted by the acid regeneration water-to-acid mode acid mist chimney can evaporate and concentrate waste acid generated by a pickling line through a Venturi preconcentrator, then convert the concentrated acid into an atomized state through an acid gun and spray the atomized acid into a roasting furnace, the concentrated acid reacts in the furnace to generate hydrogen oxide gas and ferric oxide powder, the hydrogen oxide gas and the ferric oxide powder are dedusted by a double-cyclone deduster from the top of the roasting furnace, flue gas such as high-temperature hydrogen chloride, the ferric oxide powder and the like is subjected to heat exchange through the Venturi preconcentrator, and then the flue gas is sprayed and absorbed by an absorption tower through a flue gas pipeline to generate; meanwhile, after the generated waste gas is subjected to measures such as neutralization of a washing tower, water spraying and cooling, the finally generated gas meeting the environmental protection requirement is discharged into the air from a chimney, and indexes of hydrogen chloride and ferric oxide powder meeting the national emission standard in the discharge are required.
It is worth noting that: the whole device realizes control over the device through the controller, and because the equipment matched with the controller is common equipment, the device belongs to the existing mature technology, and the electrical connection relation and the specific circuit structure are not repeated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A method for treating red smoke emitted by an acid regeneration water-to-acid mode acid mist chimney is characterized by comprising the following steps: the method comprises the following steps:
s1: waste acid generated on an acid regeneration production line is conveyed into a Venturi preconcentrator (3) through a waste acid pump (14) for evaporation concentration treatment, part of the concentrated waste acid is conveyed into the Venturi preconcentrator (3) through a Venturi circulating pump (13) for circulating spraying work, and part of the waste acid is guided into a concentrated acid filter (10) for filtering under the action of an acid supply pump (12) of a roasting furnace;
s2: waste acid filtered by the concentrated acid filter (10) enters the roasting furnace (1), is atomized by an acid gun and then is sprayed into the furnace for evaporation, waste gas generated by acid mist evaporation in the roasting furnace (1) is discharged from the top of the roasting furnace (1) to the double-cyclone separator (2) for dust removal, and the waste gas after dust removal is discharged from the double-cyclone separator (2) to the Venturi preconcentrator (3);
s3: waste gas directly enters an absorption tower (4) after coming out of the Venturi preconcentrator (3), enters the absorption tower (4) for spraying absorption to form regenerated acid, and the regenerated acid flows out of the bottom of the absorption tower (4) and is stored and recycled;
s4: the mixed gas which is not absorbed in the absorption tower (4) escapes from the top of the absorption tower (4), enters the washing tower (6) under the action of the waste gas fan (5), and is washed, absorbed and purified, and the waste gas which reaches the emission standard is discharged to the atmosphere from a chimney (7) at the top of the washing tower (6).
2. The method for treating red smoke emitted by the acid regeneration water-to-acid mode acid mist chimney according to claim 1, wherein the method comprises the following steps: after waste acid enters the Venturi preconcentrator (3) through the waste acid pump (14), the waste acid continuously circularly flows in the Venturi preconcentrator (3) under the action of the Venturi circulating pump (13), and hot air entering from the top of the Venturi preconcentrator (3) and treated by the double cyclone separators (2) exchanges heat with circulating acid, so that moisture in the waste acid is evaporated, and the concentration of the waste acid is improved.
3. The method for treating red smoke emitted by the acid regeneration water-to-acid mode acid mist chimney according to claim 1, wherein the method comprises the following steps: when the waste gas enters the Venturi preconcentrator (3), the waste gas is directly contacted with the circulating acid with lower temperature in the Venturi preconcentrator (3), the temperature of the waste gas is reduced, and meanwhile, the content of iron oxide powder in the waste gas is reduced.
4. The method for treating red smoke emitted by the acid regeneration water-to-acid mode acid mist chimney according to claim 1, wherein the method comprises the following steps: and dust generated in the waste gas dedusting process of the double cyclone separator (2) is reintroduced into the roasting furnace (1) for recycling through a pipeline at the bottom of the double cyclone separator (2).
5. The method for treating red smoke emitted by the acid regeneration water-to-acid mode acid mist chimney according to claim 1, wherein the method comprises the following steps: hot air generated by a burner in the roasting furnace (1) enables waste acid atomized solution to perform full endothermic reaction in the furnace, and waste acid liquid drops are rapidly evaporated in the falling process to generate hydrochloric acid gas and ferric oxide powder; the ferric oxide powder solid falls into a cone at the lower part of the roasting furnace (1), and is crushed by a crusher (8), and then a rotary valve (9) is opened to discharge the ferric oxide powder solid.
6. The method for treating red smoke emitted by the acid regeneration water-to-acid mode acid mist chimney according to claim 1, wherein the method comprises the following steps: and the washing tower (6) circularly washes tail gas by desalted water at the tower top, gas is fed from the bottom of the absorption tower (4), and in the countercurrent process, the content of hydrogen chloride gas and chlorine in the tail gas is reduced, and iron oxide powder micro-particles in the gas are removed.
7. The method for treating red smoke emitted by the acid regeneration water-to-acid mode acid mist chimney according to claim 1, wherein the method comprises the following steps: rinse water in the washing tower (6) is discharged to the collection water tank (11) from the bottom of the washing tower, rinse water in the collection water tank (11) is introduced into the absorption tower (4) through the absorption tower pump (15), desalted water is added from the bottom of the washing tower (6), and the desalted water in the washing tower (6) is recycled through the cooperation of a washing tower circulating pump (16) communicated with the bottom of the washing tower (6).
8. The method for treating red smoke emitted by the acid regeneration water-to-acid mode acid mist chimney according to claim 7, wherein the method comprises the following steps: the washing tower circulating pump (16) introduces part of desalted water into the waste gas fan (5), so that the mixed gas passes through the waste gas fan (5) and is cleaned by the desalted water; the desalted water after being cleaned enters a water collecting tank (11) for collection.
9. The method for treating red smoke emitted by the acid regeneration water-to-acid mode acid mist chimney according to claim 1, wherein the method comprises the following steps: the absorption tower (4) adopts desalted water and rinsing water to absorb hydrogen chloride gas in the waste gas, and the hydrogen chloride gas is dissolved in water to form regenerated acid.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229912A (en) * | 2021-12-20 | 2022-03-25 | 中冶南方工程技术有限公司 | System and process method for generating high-quality iron oxide powder and high-concentration hydrochloric acid |
| CN114797389A (en) * | 2022-06-07 | 2022-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Condensation purification treatment device and method for acid regeneration chlorine-containing waste gas |
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| 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 |
| CN204529303U (en) * | 2015-04-16 | 2015-08-05 | 成都华西化工科技股份有限公司 | A kind ofly can prevent the acid regeneration device emitting red cigarette |
-
2020
- 2020-12-22 CN CN202011528873.1A patent/CN112499589A/en active Pending
Patent Citations (2)
| 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 |
| CN204529303U (en) * | 2015-04-16 | 2015-08-05 | 成都华西化工科技股份有限公司 | A kind ofly can prevent the acid regeneration device emitting red cigarette |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229912A (en) * | 2021-12-20 | 2022-03-25 | 中冶南方工程技术有限公司 | System and process method for generating high-quality iron oxide powder and high-concentration hydrochloric acid |
| CN114797389A (en) * | 2022-06-07 | 2022-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Condensation purification treatment device and method for acid regeneration chlorine-containing waste gas |
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