CN209113481U - A kind of troilite, which is mixed, burns sulfur waste acid system - Google Patents
A kind of troilite, which is mixed, burns sulfur waste acid system Download PDFInfo
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- CN209113481U CN209113481U CN201821833149.8U CN201821833149U CN209113481U CN 209113481 U CN209113481 U CN 209113481U CN 201821833149 U CN201821833149 U CN 201821833149U CN 209113481 U CN209113481 U CN 209113481U
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- troilite
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model belongs to industrial waste sulfuric acid system, it is mixed more particularly to a kind of troilite and burns sulfur waste acid system, system is sprayed into including troilite plus mine device, the fluidized bed furnace of roasting pyrite and Waste Sulfuric Acid, it is characterized in that the Waste Sulfuric Acid spray head that the spent acid sprays into system is placed in fluidized bed furnace top expanding reach, Vaporizing cooling, which is arranged, in fluidized bed furnace lower part boiling bed restrains, Vaporizing cooling tube bank connection waste heat boiler.The system of the utility model had both eliminated the public hazards of sulfur waste acid pollution, in turn ensured the normal operation of sulfate system, had apparent environmental benefit and economic benefit.
Description
Technical field
The utility model relates to industrial waste sulfuric acid systems, and in particular to arrive Waste Sulfuric Acid regeneration.System is mainly alkyl
Change the regeneration processing of Waste Sulfuric Acid.
Background technique
In recent years, it is more than 1,000,000 tons that gasoline alkylate process generates Waste Sulfuric Acid every year, and is mentioned with to quality of gasoline
It is high and increase.This not only wastes Sulphur ressource, but also causes environmental pollution.The road that green circulation economy must be walked, to Waste Sulfuric Acid into
Row recycling and reusing.
Mainly have a four class methods to the processing of Waste Sulfuric Acid both at home and abroad at present: concentration and recovery, neutralisation treatment are comprehensively utilized and are split
Solve regeneration treatment.According to the concentration of Waste Sulfuric Acid and the content of impurity, rationally effective method is selected.
Using cracking recycling be more popular method at present to waste sulfuric acid from alkylation, cracking process in horizontal pyrolysis furnace into
Row.Since sulfur waste acid cleavage needs to absorb heat, cracking using addition fuel, spray into sulphur, with
H2S gas Combined Treatment.Due to containing gas chromatography and metal salt in Waste Sulfuric Acid, easy coking is generated after cracking
Object, thus the multitubular boiler with clean-up port is selected to furnace gas heat recovery after cracking.This needs newly-built cracking furnace system, output investment ratio
It is larger.
System for producing sulfuric acid as raw material using troilite, carries out Waste Sulfuric Acid in fluidized bed furnace while roasting pyrite
Cracking, start the new way of a sulfur waste acid cleavage relieving haperacidity, have very strong applicability and economy.
Chinese patent CN206666127U discloses a kind of Waste Sulfuric Acid regeneration application system, proposes to spray into fluidized bed furnace lower part
Waste Sulfuric Acid, this will cause the corrosion to cooling tube bundle；It also proposes directly to cool down into heat exchanger and air heat-exchange using furnace gas simultaneously,
There are problems that two in this way: first is that system closed cycle, heat can not move outside, and furnace gas temperature drop is not got off, second is that the height of gas
Dustiness can block heat exchanger quickly, be unable to operate normally.
Chinese patent CN105502306A discloses the technique using pyrite-based sulfuric acid production roaster processing Waste Sulfuric Acid, proposes
Add pyrolysis furnace after fluidized bed furnace, increases the complexity of investment and technological operation.
Summary of the invention
The purpose of this utility model is in view of the above-mentioned problems, and a kind of troilite of proposition is mixed and burns sulfur waste acid system.For
The pyrite burning system of set production capacity mixes burning Waste Sulfuric Acid, and the heat that both can use pyrite burning sufficiently cracks sulfur waste
Acid in turn ensures the normal operation of set production system.
The main technical schemes of the utility model: troilite, which is mixed, burns sulfur waste acid system, including troilite plus mine device, roasting
The fluidized bed furnace and Waste Sulfuric Acid of troilite spray into system, it is characterised in that the Waste Sulfuric Acid spray head that the spent acid sprays into system is placed in boiling
Furnace top expanding reach, Vaporizing cooling, which is arranged, in fluidized bed furnace lower part boiling bed restrains, Vaporizing cooling tube bank connection waste heat boiler.
Further, the area of the Vaporizing cooling tube bank is determined according to the grade and sulfur waste acid concentration of troilite.
It further includes sulfur waste acid storage tank and Waste Sulfuric Acid pump that the spent acid, which sprays into system,.
The furnace gas export of the fluidized bed furnace is sequentially connected waste heat boiler, cyclone dust collectors, air preheater and thermoelectricity dedusting
Device.
The waste heat boiler is waterpipe type waste heat boiler, using big row's spacing stringing.The boiling furnace bottom connects air
Air a part of blower, air blower outlet enters back into fluidized bed furnace after air preheater heats.The fluidized bed furnace lower part row
Cinder notch, waste heat boiler, cyclone dust collectors and thermoelectricity deduster lower part ash discharging hole connect unified centralized processor.
The thermoelectricity deduster is equipped with the attemperator for guaranteeing that the furnace gas temperature of thermoelectricity deduster out is higher than furnace gas dew point.
The utility model troilite, which is mixed, burns sulfur waste acid system, and waste sulfuric acid from alkylation, which is beaten by Waste Sulfuric Acid pump to fluidized bed furnace top, to be expanded
Several Waste Sulfuric Acid spray heads of big section, the Waste Sulfuric Acid being atomized through spray head enter in fluidized bed furnace furnace, while in fluidized bed furnace lower part boiling bed
Vaporizing cooling tube bank is installed, heat extra in reaction is removed, guarantees the normal operation of fluidized bed furnace.Such structure is improved,
Not only it ensure that the complete cracking of Waste Sulfuric Acid, but also prevented corrosion of the Waste Sulfuric Acid to cooling tube bundle.Vaporizing cooling tube bank and waste heat boiler
Furnace is connected, and generates saturated vapor.
Fluidized bed furnace can be added according to original feeding system in the utility model troilite, and air is sent by air blower to furnace
Bottom, to adapt to influence of the material composition change to furnace temperature, extension air enters back into fluidized bed furnace after heating by air preheater, protects
Demonstrate,prove the cracking temperature in furnace.It can be adjusted accordingly, guarantee in furnace according to the mixed-fuel burning proportion of troilite for mine amount and furnace bottom air quantity
The normal roasting of troilite.The heat that pyrite burning generates stops using the secondary of fluidized bed furnace for the cracking of atomization Waste Sulfuric Acid
Air reduces oxygen content, guarantees lytic effect, and then reduces the diluted acid loss of purification.
It mixes and boils outlet of still furnace gas after burning Waste Sulfuric Acid compared with mixing and burning forehearth gas, oxygen content reduces water content and increases in furnace gas
Add, dustiness decreases, but still up to 200g/Nm3 or so, and contains more easy coking substance in furnace gas, for furnace
These features of gas, the optimization of the utility model further progress.
The utility model recycles heat using waterpipe type waste heat boiler to furnace gas cooling, and boiler is necessary using big row's spacing
When system shutdown cooling after personnel can enter boiler cleaning decoking carried out to pipe outer wall, guarantee that boiler is run steadily in the long term.
Air preheater is arranged after cyclone dust collectors in Tthe utility model system, and gas dust content has removed 90%,
It can prevent from blocking.
Since water content increases in furnace gas, the dew point of furnace gas rises to 250 DEG C or so, so the heat preservation of setting thermoelectricity deduster
Device, to guarantee that temperature of the furnace gas before entering purification at 250 DEG C or more, avoids the condensate corrosion to equipment, pipeline.
The furnace gas of the boiling outlet of still of the utility model contains the SO2 gas that pyrite burning and spent acid are cracked to form.
Furnace gas, into cyclone dust collectors, air preheater and thermoelectricity deduster, carries out cooling dedusting after waste heat boiler cools down.It is qualified
Furnace gas afterwards enters cleaning procedure, and purified, dry, conversion, absorption prepare sulfuric acid.Waste heat boiler, cyclone dust collectors and thermoelectricity
Mine dust under deduster removes is collected by mine dust collection device, and grey field is sent to after humidifying cooling, for sale can be handled.
Burning Waste Sulfuric Acid is mixed while the system of the utility model is using boiling roaster troilite, reduces newly-built pyrolysis furnace,
Investment is saved.It is generated using the heat of boiler recycling furnace gas cooling and is supplied outside steam, saved the energy, increased income.Using
Several technical measures, it is ensured that system presses former designed capacity long period safe operation, produces qualified sulfuric acid and guarantees the market demand.
The calx of recycling increases income as by-product sale.
The system of the utility model had both eliminated the public hazards of sulfur waste acid pollution, in turn ensured the normal operation of sulfate system,
With apparent environmental benefit and economic benefit.
Detailed description of the invention
Fig. 1 is the process flow chart of the utility model embodiment system.
In figure, 1- sulfur waste acid storage tank, 2- Waste Sulfuric Acid is pumped, and 3- air blower, 4- adds mine device, 5- spray head, 6- fluidized bed furnace, 7-
Waste heat boiler, 8- cyclone dust collectors, 9- air preheater, the tube bank of 10- Vaporizing cooling, 11- conveyer, 12- thermoelectricity deduster.
Specific embodiment
The utility model is described in detail below with reference to embodiment and attached drawing.
Embodiment
Troilite, which is mixed, burns Waste Sulfuric Acid system reference attached drawing 1, the main boiling for adding mine device 4, roasting pyrite including troilite
It rises furnace 6 and Waste Sulfuric Acid sprays into system, the Waste Sulfuric Acid spray head 5 for being mainly characterized by spent acid penetrating system is placed in the expansion of 6 top of fluidized bed furnace
Big section, 6 lower part boiling bed of fluidized bed furnace are arranged Vaporizing cooling and restrain 10, and Vaporizing cooling tube bank 10 connects waste heat boiler 7, Vaporizing cooling
The area of tube bank 10 is determined according to the grade and sulfur waste acid concentration of troilite.
In embodiment, it further includes waste sulfuric acid from alkylation storage tank 1 and Waste Sulfuric Acid pump 2 that spent acid, which sprays into system,.The furnace gas of fluidized bed furnace 6
Outlet is sequentially connected waste heat boiler 7, cyclone dust collectors 8, air preheater 9 and thermoelectricity deduster 12.
In embodiment, waste heat boiler 7 is waterpipe type waste heat boiler, using big row's spacing stringing.The connection of 6 bottom of fluidized bed furnace is empty
Gas blower 3, air a part that air blower 3 exports enter back into fluidized bed furnace 6 after the heating of air preheater 9.
The lower part ash discharging hole setting of 6 lower part slag-drip opening of fluidized bed furnace, waste heat boiler 7, cyclone dust collectors 8 and thermoelectricity deduster 12
Embedded scraper transporter connects unified centralized processor.
Thermoelectricity deduster 12 is equipped with the attemperator for guaranteeing that the furnace gas temperature of thermoelectricity deduster out is higher than furnace gas dew point.
Application examples
The application example, sulfuric acid production system ability are 100kt/a, and troilite sulfur-bearing 35%, sulfuric acid ore deposit consumption is 960kg/t acid.
Alkylation spent acid component: sulfur acid 90%, aqueous 4%, remaining is various impurity.
It is annual to put into 76886 tons of mine in kind according to reasonable ratio, 23956 tons of waste sulfuric acid from alkylation of burning is mixed every year, mixes burning
The sulfuric acid of Waste Sulfuric Acid production accounts for 19.91% that system produces sour total amount.
Throwing mine amount per hour is 9.61 tons, is had for mine system by adding mine device 4 to add from the boiling bed top of fluidized bed furnace 6
Enter.Air needed for fluidized bed furnace is added by air blower 3 from furnace bottom.For guarantee furnace temperature at 1050 DEG C or so, extension air
Furnace bottom is sent into after the heating of air preheater 9.Clinker is discharged from the slag-drip opening of lower part, after the cooling of roller cooler
Into embedded scraper transporter 11, unified centralized processor is removed.
Waste sulfuric acid from alkylation is stored in the sulfur waste acid storage tank 1 that container is 50 tons, is sent by 2 pressurization of Waste Sulfuric Acid pump to fluidized bed furnace
Top enlargement layer sprays into fluidized bed furnace by one group of atomization of spray head 5, cracks under the conditions of 1050 DEG C.
About 1050 DEG C of furnace gas enters waste heat boiler 7 from outlet of still, and boiler is the natural circulation boiler with water pipe of big row's spacing.
Boiler feedwater absorbs the saturated vapor confession outside of generation 3.5MPa after furnace gas heat.Furnace gas be cooled to 450 DEG C go out boiler enter it is subsequent
Equipment.Calx falls into lower part embedded scraper transporter 11 by flue-dust retainer, removes unified centralized processor.
About 1 square metre of Vaporizing cooling tube bank 10 is installed in fluidized bed furnace boiling bed, cooling tube bundle is connected with boiler drum,
It generates and is supplied outside steam.
For furnace gas after 8 dedusting of cyclone dust collectors, furnace gas dustiness drops to 15g/Nm3 or so, and about 420 DEG C of furnace gas enters
9 heating part air of air preheater.About 380--400 DEG C of furnace gas enters the further dedusting of thermoelectricity deduster 12 to 0.2g/
Nm3 or so, furnace gas temperature enter purification device at 250--300 DEG C or so.
After mixing burning Waste Sulfuric Acid, oxygen sulphur supplements auxiliary air in the electrostatic precipitator of cleaning procedure, mentions than reducing in furnace gas
Hyperoxia sulphur ratio makes the SO2 concentration for being into conversion system in 8.5--9%, guarantees that conversion post operates normally.
Lower part embedded scraper transporter 11 is fallen into from flue-dust retainer by the mine dust of cyclone dust collectors 8, thermoelectricity deduster 12 except under, with
Lower portion thereof calx rises the slag of furnace outlet humidifying cooling together, and lime-ash is as byproduct export trade after processing.
System run a period of time after, when discovery Boiler Steam yield decline, system resistance increase after, can schedule system stop
Vehicle cooling.Boiler manhole is opened after cooling, by manually clearing up outer wall coking, system heats up operation again after cleaning.
Above-mentioned combination example and attached drawing are described this system and device, are referred to the device of other ability systems
Present case is organized and implemented, and can be made improvements to details.Be detached from the utility model conception and scope, can with number of improvements could be made,
It should be understood that.The scope of the utility model is defined by the following claims.
Claims (8)
1. a kind of troilite, which is mixed, burns sulfur waste acid system, fluidized bed furnace and Waste Sulfuric Acid including troilite plus mine device, roasting pyrite
Penetrating system, it is characterised in that the Waste Sulfuric Acid spray head that the Waste Sulfuric Acid sprays into system is placed in fluidized bed furnace top expanding reach, fluidized bed furnace
Vaporizing cooling, which is arranged, in lower part boiling bed restrains, Vaporizing cooling tube bank connection waste heat boiler.
2. troilite according to claim 1, which is mixed, burns sulfur waste acid system, it is characterised in that the face of the Vaporizing cooling tube bank
Product is determined according to the grade and sulfur waste acid concentration of troilite.
3. troilite according to claim 1, which is mixed, burns sulfur waste acid system, it is characterised in that the Waste Sulfuric Acid sprays into system also
It is pumped including sulfur waste acid storage tank and Waste Sulfuric Acid.
4. troilite according to claim 1, which is mixed, burns sulfur waste acid system, it is characterised in that the furnace gas export of the fluidized bed furnace
It is sequentially connected waste heat boiler, cyclone dust collectors, air preheater and thermoelectricity deduster.
5. troilite according to claim 1 or 4, which is mixed, burns sulfur waste acid system, it is characterised in that the waste heat boiler is water pipe
Formula waste heat boiler, using big row's spacing stringing.
6. troilite according to claim 1 or 4, which is mixed, burns sulfur waste acid system, it is characterised in that the boiling furnace bottom connection
Air a part of air blower, air blower outlet enters back into fluidized bed furnace after air preheater heats.
7. troilite according to claim 4, which is mixed, burns sulfur waste acid system, it is characterised in that fluidized bed furnace lower part slag-drip opening,
The lower part ash discharging hole of waste heat boiler, cyclone dust collectors and thermoelectricity deduster connects unified centralized processor.
8. troilite according to claim 4, which is mixed, burns sulfur waste acid system, it is characterised in that the thermoelectricity deduster, which is equipped with, to be protected
The furnace gas temperature for demonstrate,proving out thermoelectricity deduster is higher than the attemperator of furnace gas dew point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821833149.8U CN209113481U (en) | 2018-11-08 | 2018-11-08 | A kind of troilite, which is mixed, burns sulfur waste acid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821833149.8U CN209113481U (en) | 2018-11-08 | 2018-11-08 | A kind of troilite, which is mixed, burns sulfur waste acid system |
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| Publication Number | Publication Date |
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| CN209113481U true CN209113481U (en) | 2019-07-16 |
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| CN201821833149.8U Active CN209113481U (en) | 2018-11-08 | 2018-11-08 | A kind of troilite, which is mixed, burns sulfur waste acid system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146097A (en) * | 2020-09-18 | 2020-12-29 | 南京合工智能环保研究院有限公司 | Heat exchange device and heat exchange method for waste acid cracking acid making process |
-
2018
- 2018-11-08 CN CN201821833149.8U patent/CN209113481U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146097A (en) * | 2020-09-18 | 2020-12-29 | 南京合工智能环保研究院有限公司 | Heat exchange device and heat exchange method for waste acid cracking acid making process |
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