CN206027407U - Sulphuric acid tail gas processing device - Google Patents
Sulphuric acid tail gas processing device Download PDFInfo
- Publication number
- CN206027407U CN206027407U CN201620973381.6U CN201620973381U CN206027407U CN 206027407 U CN206027407 U CN 206027407U CN 201620973381 U CN201620973381 U CN 201620973381U CN 206027407 U CN206027407 U CN 206027407U
- Authority
- CN
- China
- Prior art keywords
- tail gas
- ammonia
- ammonia wastewater
- wastewater
- tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model relates to a sulphuric acid tail gas processing device, clean tower and electric demister including tail gas, the sulphuric acid tail gas access connection absorption tower of tower or the sulphuric acid tail gas export of sour gas condenser are cleaned to tail gas, the top is established the tail gas export, is removed the foam layer and evaporate ammonia wastewater spray set, evaporate ammonia wastewater spray set and evaporate the ammonia wastewater export through evaporating ammonia wastewater pipe connection ammonia still bottom, evaporate the ammonia wastewater pipeline and be equipped with in proper order and evaporate ammonia wastewater pump, ammonia water heat exchanger and useless water chiller along evaporating ammonia wastewater transport method, the inlet that the tower bottom was cleaned to tail gas is connected to the liquid outlet of electric demister bottom, and tail gas is cleaned the wastewater outlet of tower bottom and is connected the biochemical treatment system, the clean tail gas exit linkage chimney in electric demister top. The utility model discloses an evaporate SO2 and acid mist in the ammonia wastewater chemical absorption sulphuric acid tail gas, do not need extra alkali source and absorption liquid, the ammonia wastewater that evaporates behind the chemical absorption sends the processing of biochemical treatment system back to, and the sulphuric acid tail gas after cleaning gets into electric demister, energy saving and emission reduction, and environmental protection effect is good.
Description
Technical field
This utility model is related to industrial waste gas purifying processing technology field, more particularly to a kind of sulfuric acid tail gas processing meanss.
Background technology
Sulfuric acid tail gas are except containing a large amount of harmless N2、O2And CO2Outward, also containing a small amount of harmful SO2And acid mist, need
Through processing, after reaching discharge standard, can just be emitted in air.At present, the treatment technology of sulfuric acid tail gas mainly has ammonia-acid
Method, sodium alkali, lime cream absorption method, activated coke method, new catalytic method etc., method is more, differs from one another.At which kind of tail gas
Reason technology, answer treatment in accordance with local conditions take into full account process characteristic, desulfurizing agent source, the market of by-product, investment cost, operating cost and
The problems such as whether bringing secondary environmental pollution.
The characteristics of acid-making process is burned for coking low-quality sulfur and desulfurization waste liquor, the existing process skill of its sulfuric acid tail gas
Art is all using ammonia absorption method.《Fuel and chemical industry》Volume 31 the 1st phase, calendar year 2001 volume 32 the 6th phases, 2015 in 2000
The 6th phase of volume 46 all burns the ammonia absorption method tail gas disposal technique in acid-making process to coking low-quality sulfur and desulfurization waste liquor
Did process introduction.As shown in figure 1, the idiographic flow of ammonia absorption method is：From absorption tower, sulfuric acid tail gas out enter smoke evacuation
Desulfurizing tower 2, with ammonia vessel 1 come ammonia absorption tail gas in remaining SO2And acid mist, the ammonium sulfite and ammonium sulfate of generation are blended into
Pretreatment process concentration tower circulation fluid, send burning operation to burn after concentration.The ammonia-containing exhaust out of exhaust gas desulfurization tower 2 enters neutralization
Tower 3, for volatilization ammonia remaining in the dilute sulfuric acid sprinkling neutralization tail gas of auto purification operation conditioning Tower, generates ammonium sulfate.By neutralizing
The ammonium sulfate that tower 3 is discharged send sulphur ammonium unit.Jing after mist separation, Jing chimneys 4 are entered greatly the tail gas discharged from neutralizing tower 3
Gas.The technical advantage of the ammonia absorption method is that Sulphur ressource is recycled utilization, is arranged without outside waste liquid, and being truly realized turns waste into wealth,
Meet national development circular economy policy and environmental requirement.But, the additional ammonia of needs is only drawback is that as alkali source, while
Containing the ammonia escaped in the tail gas of discharge.
At present the tail gas of coke-oven plant's WSA acid-making process, still meets current discharging standards GB16297, can be without
Cross vent gas treatment directly to empty.But, with national iterative method sulfuric acid industry pollution reduction work and national standard by
Step updates, and the tail gas of WSA acid-making process needs further to process that can just empty be inevitable trend.
The content of the invention
This utility model provides a kind of sulfuric acid tail gas processing meanss, is particularly well-suited to coking low-quality sulfur and desulfurization is useless
Liquid burns the vent gas treatment of acid-making process and the vent gas treatment of coke-oven plant's WSA acid-making process；Using coke-oven plant's ammonia still process unit originally
Send the SO in the alkaline distilled ammonia wastewater chemical absorbing sulfuric acid tail gas of biochemical treatment2And acid mist, it is not necessary to provide extra alkali source and
Absorbing liquid；Distilled ammonia wastewater after chemical absorbing sends biochemical treatment system process back to, and the sulfuric acid tail gas after cleaning enter electrostatic precipitator,
Air is entered by chimney the acid mist carried secretly in tail gas is removed further after, and energy-saving and emission-reduction, environment protecting are good.
In order to achieve the above object, this utility model employs the following technical solutions realization：
A kind of sulfuric acid tail gas processing meanss, including tail gas washing column and electrostatic precipitator；The sulphuric acid tail of the tail gas washing column
Gas import connects the sulfuric acid tail gas outlet of absorption tower or acid gas condenser；Offgas outlet, foam-removing layer is set at the top of tail gas washing column
With distilled ammonia wastewater spray equipment, offgas outlet is by exhaust pipe connection electrostatic precipitator bottom gas inlet；Distilled ammonia wastewater is sprayed
Device connects the outlet of ammonia still process tower bottom distilled ammonia wastewater by distilled ammonia wastewater pipeline, and distilled ammonia wastewater pipeline is along distilled ammonia wastewater carrying method
It is sequentially provided with distilled ammonia wastewater pump, ammonia heat exchanger and gaseous effluent cooler；The liquid outlet connection tail gas washing column of electrostatic precipitator bottom
The inlet of bottom, the wastewater outlet of tail gas washing column bottom connect outside biochemical treatment system by waste water conveyance conduit, give up
Water conveyance conduit is provided with waste water pump；At the top of electrostatic precipitator, net offgas outlet connects chimney.
Foam-removing layer cleaning device is additionally provided with tail gas washing column above the foam-removing layer, and foam-removing layer cleaning device is by side
Thread a pipe and be connected with distilled ammonia wastewater pipeline, on by-pass line, set valve.
The chimney is integrated with electrostatic precipitator, and chimney is solid by net offgas outlet at the top of flange and electrostatic precipitator
It is fixed to connect.
Compared with prior art, the beneficial effects of the utility model are：
1) using SO in distilled ammonia wastewater chemical absorbing sulfuric acid tail gas2And acid mist, it is not necessary to extra alkali source and absorption are provided
Liquid；The biochemical treatment system that distilled ammonia wastewater after chemical absorbing is sent in former technique is processed, and does not affect biochemical treatment system
Normal operation；
2) there is no the ammonia escaped in the net tail gas of final Jing smoke stack emissions, environment protecting is good；
3) technological process is simple, takes up an area less, fully handy existing resource, and operating cost is low.
Description of the drawings
Fig. 1 is the process chart that existing employing ammonia absorption method carries out sulfuric acid tail gas process.
Fig. 2 is the structural representation one of sulfuric acid tail gas processing meanss described in the utility model.(using packed tower, turbulent tower
Or foaming tower)
Fig. 3 is the structural representation two of sulfuric acid tail gas processing meanss described in the utility model.(using dynamic wave scrubbing tower)
In figure：1. 2. exhaust gas desulfurization tower of ammonia vessel, 3. neutralizing tower, 4. chimney, 5. ammonia still, 6. pipe-line mixer, 7. ammonia
12. electrostatic precipitator of water- to-water heat exchanger 8. gaseous effluent cooler, 9. distilled ammonia wastewater pump, 10. tail gas washing column, 11. waste water pump, 13. chimney
14. distilled ammonia wastewaters outlet 15. offgas outlet, 16. distilled ammonia wastewater spray equipment, 17. foam-removing layer, 18. sulfuric acid tail gas import 19.
23. foam-removing layer cleaning device of wastewater outlet 20. inlet, 21. liquid outlet, 22. gas inlet, 24. reverse jet tube
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiment of the present utility model is described further：
As shown in Figure 2 or Figure 3, a kind of sulfuric acid tail gas processing meanss described in the utility model, including 10 He of tail gas washing column
Electrostatic precipitator 12；The sulfuric acid tail gas of the connection absorption tower of sulfuric acid tail gas import 18 of the tail gas washing column 10 or acid gas condenser go out
Mouthful；The top of tail gas washing column 10 sets offgas outlet 15, foam-removing layer 17 and distilled ammonia wastewater spray equipment 16, and offgas outlet 15 passes through
Exhaust pipe connects 12 bottom gas inlet 22 of electrostatic precipitator；Distilled ammonia wastewater spray equipment 16 is steamed by the connection of distilled ammonia wastewater pipeline
5 bottom distilled ammonia wastewater of ammonia tower exports 14, and distilled ammonia wastewater pipeline is sequentially provided with distilled ammonia wastewater pump 9, ammonia along distilled ammonia wastewater carrying method
Water- to-water heat exchanger 7 and gaseous effluent cooler 8；The inlet of 10 bottom of the connection tail gas washing column of liquid outlet 21 of 12 bottom of electrostatic precipitator
20, the wastewater outlet 19 of 12 bottom of tail gas washing column connects outside biochemical treatment system, waste water conveying by waste water conveyance conduit
Pipeline is provided with waste water pump 11；At the top of electrostatic precipitator 12, net offgas outlet connects chimney 13.
Foam-removing layer cleaning device 23, foam-removing layer cleaning device are additionally provided with tail gas washing column 10 above the foam-removing layer 17
23 are connected with distilled ammonia wastewater pipeline by by-pass line, set valve on by-pass line.
The chimney 13 is integrated with electrostatic precipitator 12, and chimney 13 is by net tail at the top of flange and electrostatic precipitator 12
Gas outlet is fixedly connected.
It is as follows based on a kind of sulfuric acid tail gas processing method of sulfuric acid tail gas processing meanss described in the utility model：
1) the distilled ammonia wastewater Jing ammonia heat exchanger 7 at 5 bottom of ammonia still and the remained ammonia heat exchange entered before ammonia still 5, and Jing is useless
Water cooler 8 is entered at the top of tail gas washing column 10 after cooling down, and is sprayed from distilled ammonia wastewater spray equipment 16 to bottom in tower；
2) sulfuric acid tail gas that absorption tower or acid gas condenser come enter 10 bottom of tail gas washing column, the distilled ammonia wastewater with spray
Counter current contacting, the SO in tail gas2With acid mist by distilled ammonia wastewater chemical absorbing；
3) it is after drop of the sulfuric acid tail gas after cleaning Jing tower top foam-removing layer 17 except deentrainment, further into electrostatic precipitator 12
The acid mist carried secretly in trapping sulfuric acid tail gas；The net tail gas of qualified discharge standard is reached after demisting, by being erected at electrostatic precipitator 12
The chimney 13 at top enters air；
4) the distilled ammonia wastewater waste water pump 11 in tail gas washing column 10 Jing after chemical absorbing is pumped to biochemical treatment system.
The tail gas washing column 10 is using empty spray tower, packed tower, turbulent tower, foaming tower, dynamic wave scrubber or Venturi tube.
As shown in Figure 2 or Figure 3, the ammonia still process unit of coke-oven plant is the requisite ingredient of gas cleaning device.Ammonia still process
In unit, remained ammonia elder generation Jing ammonia heat exchanger 7 and distilled ammonia wastewater heat exchange, in pipe-line mixer 6, using mass fraction 5%
～40% NaOH alkali liquor sends into ammonia still after mixing homogeneously with remained ammonia, to decompose the solid ammonium-salt in remained ammonia, drop
Full ammonia content in low distilled ammonia wastewater.
Remained ammonia is entered by 5 upper tray of ammonia still with the mixed solution of NaOH alkali liquor, dirty along each layer column plate, until
Bottom of towe；Water vapour is sent into by 5 bottom of ammonia still, and bubbling passes through the ammonia liquid layer on each column plate, until tower top.In vapor-liquid contacting process
In, the ammonia on column plate is heated, and the ammonia, hydrogen sulfide, Blausure (German) and carbon dioxide in water is stripped out after switching to gas phase, by
Tower top is discharged.
The distilled ammonia wastewater for having taken off ammonia and sour gas is discharged by 5 bottom of towe of ammonia still, and Jing ammonia heat exchanger 7 exchanges heat and waste water is cold
But device 8 is cooled to about 40 DEG C, in common process, and the distilled ammonia wastewater after cooling directly send biochemical treatment system to process.And this practicality
It is new that distilled ammonia wastewater is recycled, it is used for absorbing SO in sulfuric acid tail gas in being introduced into tail gas washing column 102And acid mist.
Following examples are implemented under premised on technical solutions of the utility model, give detailed embodiment
With specific operating process, but protection domain of the present utility model is not limited to following embodiments.Dress used in following embodiments
Put the device for being conventional structure if no special instructions.
【Embodiment 1】
As shown in Fig. 2 in the present embodiment, tail gas washing column 10 is using the one kind in packed tower, turbulent tower and foaming tower.Fill out
Material tower has production capacity big, and separation efficiency is high, and pressure drop is little, the big advantage of operating flexibility；Turbulent tower has simple structure, equipment
It is little, reduced investment, the advantage of a little repair；Foaming tower then has efficiency high, and simple structure has certain operational stability and adaptation
The advantage of property.During concrete application, can select as needed.
In the present embodiment, the sulfuric acid tail gas that absorption tower or acid gas condenser come enter tail gas washing column 10, from bottom to top with
The distilled ammonia wastewater counter current contacting that tower top is sprayed, the SO in tail gas2With acid mist by distilled ammonia wastewater chemical absorbing.Removing SO2And acid
After drop of the sulfuric acid tail gas of mist Jing tower top foam-removing layer 17 except deentrainment, into electrostatic precipitator 12；Ammonia still process after chemical absorbing is given up
Water is directly pumped to biochemical treatment system with waste water pump 11 and carries out subsequent treatment.
Foam-removing layer 16 in tail gas washing column 10 is periodically cleaned with distilled ammonia wastewater using foam-removing layer cleaning device 23, prevents tower
Internal resistance is excessive, and foam-removing layer cleaning device 23 is also adopted by spray equipment.
The sulfuric acid tail gas out of tail gas washing column 10 enter electrostatic precipitator 12, further trap the acid carried secretly in sulfuric acid tail gas
Mist.Net exhaust emissions concentration after demisting meets national standard, is entered greatly by being erected at the chimney 13 at the top of electrostatic precipitator 12
Gas.
【Embodiment 2】
As shown in figure 3, the tail gas washing column 10 of the present embodiment adopts dynamic wave scrubber, operation high with detersive efficiency
Reliably, the advantages of maintenance cost is few.
In the present embodiment, the sulfuric acid tail gas that absorption tower or acid gas condenser come enter at a high speed dynamic wave scrubbing from top to bottom
In the reverse jet tube 24 of device, distilled ammonia wastewater is then inversely sprayed into by nozzle in the air-flow of sulfuric acid tail gas from bottom to top.Gas-liquid two-phase exists
In reverse jet tube 24, high speed in reversed direction head-on collision, when gas-liquid two-phase momentum reaches balance, forms the froth zone of a high turbulence, here
In region, gas liquid interfacial area is big, and contact surface updates rapidly.When sulfuric acid tail gas pass through this froth zone, SO2With acid mist by ammonia still process
Waste water chemical absorbing.
Removing SO2Gas-liquid separation is carried out with the sulfuric acid tail gas of acid mist into the gas-liquid separation groove of dynamic wave scrubber, then
Electrostatic precipitator 12 is entered after drop of the groove top foam-removing layer 17 except deentrainment；Distilled ammonia wastewater after chemical absorbing, directly uses useless
Water pump 11 is pumped to biochemical treatment system and carries out subsequent treatment.
The sulfuric acid tail gas out of tail gas washing column 10 enter electrostatic precipitator 12, further trap the acid mist carried secretly in tail gas.
Net exhaust emissions concentration after demister meets national standard, is entered greatly by being erected at the chimney 13 at the top of electrostatic precipitator 12
Gas.
The above, only this utility model preferably specific embodiment, but protection domain of the present utility model is not
Be confined to this, any those familiar with the art in the technical scope that this utility model is disclosed, according to this practicality
New technical scheme and its utility model design in addition equivalent or change, should all cover in protection model of the present utility model
Within enclosing.
Claims (3)
1. a kind of sulfuric acid tail gas processing meanss, it is characterised in that including tail gas washing column and electrostatic precipitator；The tail gas washing column
Sulfuric acid tail gas import connection absorption tower or acid gas condenser sulfuric acid tail gas outlet；Set tail gas to go out at the top of tail gas washing column
Mouth, foam-removing layer and distilled ammonia wastewater spray equipment, offgas outlet connect electrostatic precipitator bottom gas inlet by exhaust pipe；Ammonia still process
Waste water spray equipment connects the outlet of ammonia still process tower bottom distilled ammonia wastewater by distilled ammonia wastewater pipeline, and distilled ammonia wastewater pipeline is along distilled ammonia wastewater
Carrying method is sequentially provided with distilled ammonia wastewater pump, ammonia heat exchanger and gaseous effluent cooler；The liquid outlet connection tail of electrostatic precipitator bottom
The inlet of the net tower bottom of air purge, the wastewater outlet of tail gas washing column bottom connect outside biochemical treatment by waste water conveyance conduit
System, waste water conveyance conduit are provided with waste water pump；At the top of electrostatic precipitator, net offgas outlet connects chimney.
2. a kind of sulfuric acid tail gas processing meanss according to claim 1, it is characterised in that the tail gas above the foam-removing layer
Foam-removing layer cleaning device is additionally provided with washing column, and foam-removing layer cleaning device is connected with distilled ammonia wastewater pipeline by by-pass line, it is other
Valve is set on threading a pipe.
3. a kind of sulfuric acid tail gas processing meanss according to claim 1, it is characterised in that the chimney with electrostatic precipitator is
Integral structure, chimney are fixedly connected with net offgas outlet at the top of electrostatic precipitator by flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620973381.6U CN206027407U (en) | 2016-08-29 | 2016-08-29 | Sulphuric acid tail gas processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620973381.6U CN206027407U (en) | 2016-08-29 | 2016-08-29 | Sulphuric acid tail gas processing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206027407U true CN206027407U (en) | 2017-03-22 |
Family
ID=58301555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620973381.6U Active CN206027407U (en) | 2016-08-29 | 2016-08-29 | Sulphuric acid tail gas processing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206027407U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108970337A (en) * | 2018-07-26 | 2018-12-11 | 扬州嘉明环保科技有限公司 | Reduce dry method Sulphuric acid device wastewater discharge system and its application method |
| CN112657300A (en) * | 2019-10-15 | 2021-04-16 | 中石化南京化工研究院有限公司 | Sulfuric acid tail gas treatment process |
-
2016
- 2016-08-29 CN CN201620973381.6U patent/CN206027407U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108970337A (en) * | 2018-07-26 | 2018-12-11 | 扬州嘉明环保科技有限公司 | Reduce dry method Sulphuric acid device wastewater discharge system and its application method |
| CN112657300A (en) * | 2019-10-15 | 2021-04-16 | 中石化南京化工研究院有限公司 | Sulfuric acid tail gas treatment process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110975546B (en) | Improved ammonia desulphurization method for controlling aerosol generation in absorption process | |
| CN109432936A (en) | Sintering flue gas processing method and processing system | |
| CN201324593Y (en) | Wet ammonia flue gas desulphurization device | |
| CN103506002B (en) | Two-period form Two-way Cycle spraying filler composite absorption tower | |
| CN102716648A (en) | Method for automatically controlling desulphurization and denitration by flue gas based on pH value and ORP value and apparatus thereof | |
| CN205700120U (en) | A kind of wet method sulphur removing and dust removing integrated apparatus | |
| CN106139866A (en) | A kind of employing adverse current opposite-flushing type turbulence washing tower waste gas treatment process and device thereof | |
| CN106139850A (en) | A kind of energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus | |
| CN116603368A (en) | Method for applying ultra-clean ammonia desulfurization technology to carbon capture process | |
| CN106237811A (en) | A kind of sulfuric acid tail gas processing method and processing device | |
| CN105195005B (en) | Coking flue gas and ammonia-containing water integrated treatment economic benefits and social benefits cleaning system | |
| CN204107328U (en) | A kind of high-concentration fume purifier | |
| CN105797562A (en) | Two-section type double-ammonia-process integrated desulfurization and denitration system for coking flue gas | |
| CN101254392A (en) | Energy-saving type sodium sulphite circulation desulfurizing device and method | |
| CN101757844A (en) | Method and device for performing flue gas desulfurization by using ammonia process | |
| CN108686478B (en) | Flue gas desulfurization and desulfurization wastewater treatment method and device | |
| CN206027407U (en) | Sulphuric acid tail gas processing device | |
| CN107029523B (en) | Foam washer | |
| CN103977664A (en) | Flue gas desulfurization, denitration and dust removal method | |
| CN104119946B (en) | A kind of catalytic cracking flue gas desulfurization and Acidic Gas Treating technique | |
| CN214345559U (en) | Ultrasonic atomization ship desulfurization system | |
| CN111603891A (en) | Flue gas absorption washing system and method | |
| CN205886581U (en) | Adopt formula torrent scrubbing tower exhaust treatment device that hedges against current | |
| CN201214046Y (en) | Ammonia process desulphurizing device for reducing ammonia escape | |
| CN101791511A (en) | Process and system for ammonia spraying flue gas desulfurization and sulfur dioxide recovery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |