CN104906935A - Acid-making tail gas purification process and acid-making tail gas purification device - Google Patents
Acid-making tail gas purification process and acid-making tail gas purification device Download PDFInfo
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- CN104906935A CN104906935A CN201510289873.3A CN201510289873A CN104906935A CN 104906935 A CN104906935 A CN 104906935A CN 201510289873 A CN201510289873 A CN 201510289873A CN 104906935 A CN104906935 A CN 104906935A
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- tail gas
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention relates to an acid-making tail gas purification process and an acid-making tail gas purification device. The acid-making tail gas purification device is a vertical type tower and comprises a crystallization section, a deacidification section and a deamination section, wherein the deacidification section is provided with a tail gas inlet pipe connected with a tail gas outlet of a waste liquid incineration acid-making device, an ammonia water spraying device is arranged in the tail gas inlet pipe, and acid-making tail gas reacts with ammonia water in the tail gas inlet pipe to remove SO2; tail gas comes into full contact with circulating mother liquid in an annular channel of the deacidification section by an annular sprayer, ammonium sulfite in circulating mother liquid, oxygen in tail gas and oxygen entering the deacidification section through an air inlet are subjected to oxidation reaction to produce ammonium sulfate; the tail gas in the deacidification section further reacts with the circulating ammonium sulfate mother liquid added with sulfuric acid to remove ammonia, and finally, the purified tail gas reaches the national emission standard requirement; according to the process, ammonium sulfate crystal byproducts can be produced, the enterprise income can be increased, and the acid-making tail gas purification device has the advantages of compact structure, small occupied area and low investment, and can be operated simply.
Description
Technical field
The present invention relates to industrial tail gas processing technology field, particularly relate to process for purifying and device that a kind of coking industry desulfurization waste liquor burns the relieving haperacidity tail gas that acid-making process process is formed.
Background technology
Liquid waste incineration acid-making process will produce elemental sulfur and secondary salt liquid waste incineration in wet oxidation desulfurization technique, utilize quality is lower, market outlet is bad sulphur and the desulfurization secondary salt waste liquid without direct value, produce the concentrated sulfuric acid that economic worth is relatively high, achieve the harmless treatment of secondary salt waste liquid, make ammonia process Wet-type oxidation sweetening realize sustainable hamlessizing technology.But still containing the sulfur dioxide be not completely absorbed on a small quantity in relieving haperacidity tail gas, need remove further, at present normal employing exhaust gas desulfurization tower and NH
3neutralizing tower carries out desulfurization respectively and washes ammonia, but these two kinds of techniques all to there is number of devices many, floor space is large, the shortcomings such as complicated operation.
Summary of the invention
The invention provides a kind of relieving haperacidity tail gas clean-up technique, relieving haperacidity tail gas is de-SO in gas inlet pipe
2, in the circular passage of depickling section, fully contact generation ammonium sulfate by ring sparger with circulating mother liquor, in deamination section by adding the circulation ammonium sulfate liquor of sulfuric acid except ammonia, the tail gas after purification reaches discharging standards requirement, and can generate sulphur crystalline ammonium; The device simultaneously provided has compact conformation, and floor space is little, small investment, advantage simple to operate.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A kind of relieving haperacidity tail gas clean-up technique, comprises the steps:
1) relieving haperacidity tail gas enters relieving haperacidity exhaust gas cleaner through gas inlet pipe, fully mixes, the SO in tail gas in gas inlet pipe with by the ammoniacal liquor under ammonia water spraying device sprays
2with ammonia react, generate ammonium sulfite;
2) tail gas and after ammonia react enters the depickling section of relieving haperacidity exhaust gas cleaner, the circulating mother liquor counter current contacting of spraying with ring sparger, ammonium sulfite in circulating mother liquor and the oxygen in tail gas and the oxygen generation oxidation reaction entered by air intake in depickling section, generate ammonium sulfate; Ammonium sulfate enters relieving haperacidity exhaust gas cleaner crystallized region with circulating mother liquor communicating pipe by conical head and decline; Tail gas after circulating mother liquor spray enters in depickling section demister, wherein will carry droplet removing under the influence of centrifugal force secretly;
3) at crystallized region, along with the rising of ammonium sulfate concentrations in circulating mother liquor, start to occur sulphur crystalline ammonium, crystallization is grown up gradually in the process risen, and finally falls into bottom crystallized region, and is discharged by crystalline mother solution outlet, enters ammonium sulfate workshop section and carries out subsequent treatment; Crystallized region top circulating mother liquor exports two by circulating mother liquor and discharges, and spray by entering ring sparger by circulating mother liquor entrance after the pressurization of circulating mother liquor pump, the circulating mother liquor liquid level of crystallized region is controlled by mother liquor flowing full mouth;
4) tail gas after demist enters the deamination section of relieving haperacidity exhaust gas cleaner through disconnected liquid dish, with the ammonium sulfate liquor counter current contacting adding sulfuric acid of being sprayed by spray line, absorbs the ammonia carried secretly in tail gas, is then discharged by offgas outlet after mist eliminator; The ammonium sulfate liquor sprayed exports a discharge by circulating mother liquor after being collected by the liquid dish that breaks, by entering spray line spray after the pressurization of ammonium sulfate liquor pump; Ammonium sulfate liquor exports regular extension ammonium sulfate liquor to ammonium sulfate workshop section, and adds sulfuric acid to ensure the acidity of ammonium sulfate liquor by sulfuric acid entrance.
Described relieving haperacidity exhaust gas cleaner is vertical tower, and comprise crystallized region, depickling section and deamination section, relieving haperacidity tail gas tangentially enters depickling section along tower body, and after ring sparger spray, enters demister in the circular passage of depickling section.
For realizing a kind of device of relieving haperacidity tail gas clean-up technique, comprise the crystallized region be integrated in from the bottom to top in tower body, depickling section and deamination section, described crystallized region is communicated with depickling section communicating pipe with decline by conical head, and depickling section is communicated with deamination section by disconnected liquid dish; Crystallized region is provided with crystalline mother solution outlet; Be provided with ring sparger and demister in depickling section, the liquid feeding end of ring sparger is connected the circulating mother liquor outlet two of crystallized region with circulating mother liquor pump by circulating mother liquor entrance, demister is located at depickling section centre; Depickling section is provided with the offgas outlet that gas inlet pipe connects liquid waste incineration sulphuric acid plant, establishes ammonia water spraying device in gas inlet pipe; Spray line, mist eliminator and sulfuric acid entrance is provided with in deamination section, spray line liquid feeding end connects the circulating mother liquor outlet one above disconnected liquid dish by ammonium sulfate liquor pump, tower body above disconnected liquid dish establishes ammonium sulfate liquor to export and sulfuric acid entrance, and mist eliminator is established in the below of tower body top offgas outlet.
Described ammonia water spraying device, ring sparger and spray line are equipped with multiple shower nozzle, and the shower nozzle of ammonia water spraying device is axially evenly arranged along gas inlet pipe, and the shower nozzle on ring sparger and spray line is along the circumferential direction evenly arranged.
Tower body above described conical head is provided with mother liquor flowing full mouth, is communicated with crystallized region by communicating pipe.
Described depickling section tower body external diameter is greater than deamination section tower body external diameter, and deamination section tower body barrel extends to above the conical head in depickling section tower body, and form circular passage between depickling section tower body barrel and deamination section tower body barrel, ring sparger is arranged in circular passage; Expanding channels demister is established at top, circular passage.
The tower body of described gas inlet pipe and depickling section connectivity part establishes air intake.
Compared with prior art, the invention has the beneficial effects as follows:
1) relieving haperacidity tail gas is by SO de-in gas inlet pipe
2, in the circular passage of depickling section, fully contact generation ammonium sulfate by ring sparger with circulating mother liquor, in deamination section by adding the circulation ammonium sulfate liquor of sulfuric acid except ammonia, the tail gas after purification reaches discharging standards requirement;
2) technical process of the present invention can generate sulphur crystalline ammonium byproduct, increases enterprise income;
3) device has compact conformation, and floor space is little, small investment, advantage simple to operate;
Accompanying drawing explanation
Fig. 1 is the structural representation of device of the present invention.
In figure: 1. crystalline mother solution exports 2. crystallized regions 3. disconnected liquid dish 11. spray line 12. sulfuric acid entrance 13. mist eliminator 14. offgas outlet 15. deamination section 16. ammonium sulfate liquors of communicating pipe 4. conical head 5. mother liquor flowing full mouth 6. depickling section 7. ring sparger 8. ammonium sulfate liquor pump 9. circulating mother liquor outlet 1 that decline and exports 17. demister 18. gas inlet pipe 19. ammonia water spraying device 20. circulating mother liquor entrance 21. circulating mother liquor pump 22. circulating mother liquors outlet 2 23. air intakes
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Seeing Fig. 1, is the structural representation of device of the present invention.A kind of relieving haperacidity tail gas clean-up of the present invention technique, comprises the steps:
1) relieving haperacidity tail gas enters relieving haperacidity exhaust gas cleaner through gas inlet pipe 18, in gas inlet pipe 18 with sprayed by ammonia water spraying device 19 under ammoniacal liquor fully mix, the SO in tail gas
2with ammonia react, generate ammonium sulfite;
2) tail gas and after ammonia react enters the depickling section 6 of relieving haperacidity exhaust gas cleaner, the circulating mother liquor counter current contacting of spraying with ring sparger 7, ammonium sulfite in circulating mother liquor and the oxygen in tail gas and entered the oxygen generation oxidation reaction of depickling section 6 by air intake 23, generate ammonium sulfate; Ammonium sulfate enters relieving haperacidity exhaust gas cleaner crystallized region 2 with circulating mother liquor communicating pipe 3 by conical head 4 and decline; Tail gas after circulating mother liquor spray enters in depickling section demister 17, wherein will carry droplet removing under the influence of centrifugal force secretly;
3) at crystallized region 2, along with the rising of ammonium sulfate concentrations in circulating mother liquor, start to occur sulphur crystalline ammonium, crystallization is grown up gradually in the process risen, finally fall into bottom crystallized region 2, and discharged by crystalline mother solution outlet 1, enter ammonium sulfate workshop section and carry out subsequent treatment; Crystallized region 2 top circulating mother liquor exports 2 22 by circulating mother liquor and discharges, and enter ring sparger 7 by circulating mother liquor entrance 20 after being pressurizeed by circulating mother liquor pump 21 and spray, the circulating mother liquor liquid level of crystallized region 2 is controlled by mother liquor flowing full mouth 5;
4) tail gas after demist enters the deamination section 15 of relieving haperacidity exhaust gas cleaner through disconnected liquid dish 10, with the ammonium sulfate liquor counter current contacting adding sulfuric acid of being sprayed by spray line 11, absorbs the ammonia carried secretly in tail gas, is then discharged by offgas outlet 14 after mist eliminator 13; The ammonium sulfate liquor sprayed exports 1 by circulating mother liquor after being collected by the liquid dish 10 that breaks and discharges, and enters spray line 11 spray by ammonium sulfate liquor pump 8 after being pressurizeed; Ammonium sulfate liquor outlet 16 regular extension ammonium sulfate liquors to ammonium sulfate workshop section, and add sulfuric acid to ensure the acidity of ammonium sulfate liquor by sulfuric acid entrance 12.
Described relieving haperacidity exhaust gas cleaner is vertical tower, and comprise crystallized region 2, depickling section 6 and deamination section 15, relieving haperacidity tail gas tangentially enters depickling section 6 along tower body, and after ring sparger 7 sprays, enters demister 17 in the circular passage of depickling section 6.
For realizing a kind of device of relieving haperacidity tail gas clean-up technique, comprise the crystallized region 2 be integrated in from the bottom to top in tower body, depickling section 6 and deamination section 15, described crystallized region 2 is communicated with depickling section 6 communicating pipe 3 with decline by conical head 4, and depickling section 6 is communicated with deamination section 15 by disconnected liquid dish 10; Crystallized region 2 is provided with crystalline mother solution outlet 1; Be provided with ring sparger 7 and demister 17 in depickling section 6, the liquid feeding end of ring sparger 7 is connected the circulating mother liquor outlet 2 22 of crystallized region 2 with circulating mother liquor pump 21 by circulating mother liquor entrance 20, demister 17 is located at depickling section 6 centre; Depickling section 6 is provided with the offgas outlet that gas inlet pipe 18 connects liquid waste incineration sulphuric acid plant, establishes ammonia water spraying device 19 in gas inlet pipe 18; Spray line 11, mist eliminator 13 and sulfuric acid entrance 12 is provided with in deamination section 15, spray line 11 liquid feeding end connects the circulating mother liquor outlet 1 above disconnected liquid dish 10 by ammonium sulfate liquor pump 8, tower body above disconnected liquid dish 10 establishes ammonium sulfate liquor to export 16 and sulfuric acid entrance 12, and mist eliminator 13 is established in the below of tower body top offgas outlet 14.
Described ammonia water spraying device 19, ring sparger 7 and spray line 11 are equipped with multiple shower nozzle, and the shower nozzle of ammonia water spraying device 19 is axially evenly arranged along gas inlet pipe 18, and the shower nozzle on ring sparger 7 and spray line 11 is along the circumferential direction evenly arranged.
Tower body above described conical head 4 is provided with mother liquor flowing full mouth 5, is communicated with crystallized region 2 by communicating pipe.
Described depickling section 6 tower body external diameter is greater than deamination section 15 tower body external diameter, deamination section 15 tower body barrel extends to above the conical head 4 in depickling section 6 tower body, form circular passage between depickling section 6 tower body barrel and deamination section 15 tower body barrel, ring sparger 7 is arranged in circular passage; Expanding channels demister 13 is established at top, circular passage.
Described gas inlet pipe 18 and the tower body of depickling section 6 connectivity part establish air intake 23.
Claims (7)
1. a relieving haperacidity tail gas clean-up technique, is characterized in that, comprises the steps:
1) relieving haperacidity tail gas enters relieving haperacidity exhaust gas cleaner through gas inlet pipe, fully mixes, the SO2 in tail gas and ammonia react in gas inlet pipe with by the ammoniacal liquor under ammonia water spraying device sprays, and generates ammonium sulfite;
2) tail gas and after ammonia react enters the depickling section of relieving haperacidity exhaust gas cleaner, the circulating mother liquor counter current contacting of spraying with ring sparger, ammonium sulfite in circulating mother liquor and the oxygen in tail gas and the oxygen generation oxidation reaction entered by air intake in depickling section, generate ammonium sulfate; Ammonium sulfate enters relieving haperacidity exhaust gas cleaner crystallized region with circulating mother liquor communicating pipe by conical head and decline; Tail gas after circulating mother liquor spray enters in depickling section demister, wherein will carry droplet removing under the influence of centrifugal force secretly;
3) at crystallized region, along with the rising of ammonium sulfate concentrations in circulating mother liquor, start to occur sulphur crystalline ammonium, crystallization is grown up gradually in the process risen, and finally falls into bottom crystallized region, and is discharged by crystalline mother solution outlet, enters ammonium sulfate workshop section and carries out subsequent treatment; Crystallized region top circulating mother liquor exports two by circulating mother liquor and discharges, and spray by entering ring sparger by circulating mother liquor entrance after the pressurization of circulating mother liquor pump, the circulating mother liquor liquid level of crystallized region is controlled by mother liquor flowing full mouth;
4) tail gas after demist enters the deamination section of relieving haperacidity exhaust gas cleaner through disconnected liquid dish, with the ammonium sulfate liquor counter current contacting adding sulfuric acid of being sprayed by spray line, absorbs the ammonia carried secretly in tail gas, is then discharged by offgas outlet after mist eliminator; The ammonium sulfate liquor sprayed exports a discharge by circulating mother liquor after being collected by the liquid dish that breaks, by entering spray line spray after the pressurization of ammonium sulfate liquor pump; Ammonium sulfate liquor exports regular extension ammonium sulfate liquor to ammonium sulfate workshop section, and adds sulfuric acid to ensure the acidity of ammonium sulfate liquor by sulfuric acid entrance.
2. a kind of relieving haperacidity tail gas clean-up technique according to claim 1, it is characterized in that, described relieving haperacidity exhaust gas cleaner is vertical tower, comprise crystallized region, depickling section and deamination section, relieving haperacidity tail gas tangentially enters depickling section along tower body, and after ring sparger spray, enters demister in the circular passage of depickling section.
3. for realizing the device of a kind of relieving haperacidity tail gas clean-up technique according to claim 1, it is characterized in that, comprise the crystallized region be integrated in from the bottom to top in tower body, depickling section and deamination section, described crystallized region is communicated with depickling section communicating pipe with decline by conical head, and depickling section is communicated with deamination section by disconnected liquid dish; Crystallized region is provided with crystalline mother solution outlet; Be provided with ring sparger and demister in depickling section, the liquid feeding end of ring sparger is connected the circulating mother liquor outlet two of crystallized region with circulating mother liquor pump by circulating mother liquor entrance, demister is located at depickling section centre; Depickling section is provided with the offgas outlet that gas inlet pipe connects liquid waste incineration sulphuric acid plant, establishes ammonia water spraying device in gas inlet pipe; Spray line, mist eliminator and sulfuric acid entrance is provided with in deamination section, spray line liquid feeding end connects the circulating mother liquor outlet one above disconnected liquid dish by ammonium sulfate liquor pump, tower body above disconnected liquid dish establishes ammonium sulfate liquor to export and sulfuric acid entrance, and mist eliminator is established in the below of tower body top offgas outlet.
4. a kind of relieving haperacidity exhaust gas cleaner according to claim 3, it is characterized in that, described ammonia water spraying device, ring sparger and spray line are equipped with multiple shower nozzle, the shower nozzle of ammonia water spraying device is axially evenly arranged along gas inlet pipe, and the shower nozzle on ring sparger and spray line is along the circumferential direction evenly arranged.
5. a kind of relieving haperacidity exhaust gas cleaner according to claim 3, is characterized in that, the tower body above described conical head is provided with mother liquor flowing full mouth, is communicated with crystallized region by communicating pipe.
6. a kind of relieving haperacidity exhaust gas cleaner according to claim 3, it is characterized in that, described depickling section tower body external diameter is greater than deamination section tower body external diameter, deamination section tower body barrel extends to above the conical head in depickling section tower body, form circular passage between depickling section tower body barrel and deamination section tower body barrel, ring sparger is arranged in circular passage; Expanding channels demister is established at top, circular passage.
7. a kind of relieving haperacidity exhaust gas cleaner according to claim 3, is characterized in that, the tower body of described gas inlet pipe and depickling section connectivity part establishes air intake.
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| CN201510289873.3A CN104906935B (en) | 2015-05-29 | 2015-05-29 | Acid-making tail gas purification process and acid-making tail gas purification device |
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| CN201510289873.3A CN104906935B (en) | 2015-05-29 | 2015-05-29 | Acid-making tail gas purification process and acid-making tail gas purification device |
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| CN104906935B CN104906935B (en) | 2017-05-17 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105561766A (en) * | 2016-01-05 | 2016-05-11 | 徐州工程学院 | Device for removing sulfur dioxide in industrial waste gas of filled tower and processing method thereof |
| CN106731502A (en) * | 2016-12-29 | 2017-05-31 | 大连科汇工程技术有限公司 | The technique and phosphorus ammonium reactor of a kind of phosphorus ammonium absorption and separation ammonia in gas |
| CN108097018A (en) * | 2017-11-27 | 2018-06-01 | 江苏力禾颜料有限公司 | Exhaust gas treating method prepared by H acid monosodium salt |
| CN108380024A (en) * | 2018-04-13 | 2018-08-10 | 中冶焦耐(大连)工程技术有限公司 | A kind of desulphurizing and dust-removing integral cylindric heater system and its desulfurization and dust-removal method |
| CN108404639A (en) * | 2018-04-28 | 2018-08-17 | 中冶焦耐(大连)工程技术有限公司 | A kind of relieving haperacidity exhaust gas cleaner and technique |
| CN111701429A (en) * | 2020-07-03 | 2020-09-25 | 中冶焦耐(大连)工程技术有限公司 | Stabilizer tail gas purification device |
| CN111792652A (en) * | 2020-07-09 | 2020-10-20 | 中冶焦耐(大连)工程技术有限公司 | Ammonium sulfate acidification system and process |
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| CN108380024B (en) * | 2018-04-13 | 2024-01-09 | 中冶焦耐(大连)工程技术有限公司 | Desulfurizing and dedusting integrated cylinder heating furnace system and desulfurizing and dedusting method thereof |
| CN108404639A (en) * | 2018-04-28 | 2018-08-17 | 中冶焦耐(大连)工程技术有限公司 | A kind of relieving haperacidity exhaust gas cleaner and technique |
| CN111701429A (en) * | 2020-07-03 | 2020-09-25 | 中冶焦耐(大连)工程技术有限公司 | Stabilizer tail gas purification device |
| CN111792652A (en) * | 2020-07-09 | 2020-10-20 | 中冶焦耐(大连)工程技术有限公司 | Ammonium sulfate acidification system and process |
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Effective date of registration: 20180727 Address after: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Patentee after: ACRE Coking And Refractory (Dalian) Engineering Consulting Corp., MCC Address before: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Patentee before: ACRE Coking and Refractory Engineering Consulting Corporation, MCC |
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