CN102698574A - Desulfurizing device and method for disulfide-containing waste gas - Google Patents
Desulfurizing device and method for disulfide-containing waste gas Download PDFInfo
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- CN102698574A CN102698574A CN2012101742071A CN201210174207A CN102698574A CN 102698574 A CN102698574 A CN 102698574A CN 2012101742071 A CN2012101742071 A CN 2012101742071A CN 201210174207 A CN201210174207 A CN 201210174207A CN 102698574 A CN102698574 A CN 102698574A
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- waste gas
- desulfurizing tower
- oil product
- desulfurizing
- disulphide
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Abstract
The invention discloses a desulfurizing device for disulfide-containing waste gas. The device comprises a water scrubbing tower and a desulfurizing tower, wherein the outer side of the water scrubbing tower is provided with a feeding pipe; a water scrubbing gas distributor is arranged at the inlet of the feeding pipe in the water scrubbing tower; a discharging pipe is arranged at the top end of the water scrubbing tower; the lower part of the outer side of the desulfurizing tower is connected with the discharging pipe; a desulfurized gas distributor is arranged in the desulfurizing tower; a demister is arranged on the upper part of the desulfurizing tower; a silk screen filling section is formed on the middle part of the desulfurizing tower; a waste gas discharging pipe is arranged at the top end of the desulfurizing tower; and an oil feeding pipe is arranged above the demister. The desulfurizing device has the beneficial effects that the gas distributor is adopted, so that an alkali liquor entrained in waste gas is removed completely, and the content of disulfide contained in the waste gas is lowered to 200mg/m<3> simultaneously by adsorbing and desulfurizing with oil; meanwhile, the silk screen filing section is adopted on the middle part of an adsorbing and desulfurizing tank, so that the content of disulfide in the waste gas can be further lowered to the maximum extent, treated waste gas can be exhausted directly into the atmospheric air though a chimney of 15 meters, and the produced sulfur-containing oil can be conveyed to hydrogenation treatment.
Description
Technical field
The present invention relates to a kind of desulfurizer and method that contains disulphide waste gas.
Background technology
During present liquefied petroleum gas is produced, all need pass through two processes of amine wash-out hydrogen sulfide and caustic wash desulfuration alcohol.Desulfur technology is adopted widely, is because domestic oil plant requirement divides the liquefied gas total sulfur of raw material not to be higher than 20ppm as gas on the one hand, and harsher is less demanding in 10ppm, makes civilian liquefied gas and requires total sulfur not to be higher than 343 mg/m
3Be also that on the other hand coking liquefied gas total sulfur content is generally at 20000mg/m
3More than, behind amine wash-out hydrogen sulfide, its mercaptans content is still up to 3000 mg/m
3More than.Other device production fluid gasification total sulfur is generally at 5000 mg/m
3About, behind amine wash-out hydrogen sulfide, its mercaptans content is generally at 300-800 mg/m
3Scope.
And generate in the process of sodium mercaptides at liquefied gas caustic wash desulfuration alcohol, containing the alkali lye deoxidation regeneration of sodium mercaptides, the sodium mercaptides oxidation generates disulphide.The molecular formula of disulphide is CH
3SSCH
3Molecular weight, 94; Freezing point ,-84.7 ℃; Boiling point, (1atm) 109.6 ℃; Density, (20 ℃/4 ℃) 1.0625; Viscosity, (20 ℃) 0.062Pa.s; Flash-point (open type), 16 ℃; Explosion limit, (in the air) 1.1～1.61% is (v); Self-ignition point ，>300 ℃.Be weak yellow liquid, similar rotten Chinese cabbage smell is arranged; Water-soluble hardly, can be dissolved in nearly all organic solvent with any ratio at normal temperatures, and have volatility, corrosivity and nauseating bad odor, thereby environment is caused great pollution.
What need particularly point out is; Alkali lye carried out oxidation after the most domestic refinery still adopted traditional packed tower to removal of mercaptans at present; The disulphide that can't separation of oxygenated generates, wherein a part is taken away with the alkaline residue discharging, and the disulphide of another part goes the incinerator burning with waste gas; A large amount of sulfur dioxide that burning produces enter atmosphere, serious environment pollution.
According to the actual crude runs measuring and calculating of 2008-2010 domestic oil refining enterprises, the liquefied gas annual production is above 2,000 ten thousand tons.Disulphide to liquefied gas caustic wash desulfuration alcohol is guarded measuring and calculating with toxic emission, and the disulphide that national liquid gas sweetening generates reaches 7000 tons/year with toxic emission.The device and the technology of the environmental protection and energy saving that therefore a kind of environmental friendliness of urgent need, secondary pollution discharging are less at present, processing cost is low are carried out technology upgrading to existing technology.
Summary of the invention
A kind of purpose of the present invention provides a kind of desulfurizer that contains disulphide waste gas, to overcome pure big, the high deficiency of processing cost of disulphide pollutant emission of liquefied gas caustic wash desulfuration that prior art exists.
The object of the invention is realized through following technical scheme:
A kind of desulfurizer that contains disulphide waste gas comprises water scrubber and desulfurizing tower, and the water scrubber outside is provided with feed pipe, is positioned at the feed pipe porch in the water scrubber and is provided with the washing gas distributor, and the top of water scrubber and bottom are respectively equipped with discharge nozzle and wastewater discharge pipe; Said desulfurizing tower outer lower portion is connected with discharge nozzle; Be provided with the processed gas distributor in the discharge nozzle porch in the desulfurizing tower; Desulfurizing tower top is provided with demister; The desulfurizing tower middle part is provided with the wire packing section, and the top of desulfurizing tower and bottom are respectively equipped with exhaust pipe and oil product discharge nozzle, and said demister top is provided with the oil product feed pipe.
Another kind of purpose of the present invention provides a kind of sulfur method that utilizes the above-mentioned desulfurizer that contains disulphide waste gas, and it may further comprise the steps:
1) waste gas gets into the water scrubber dealkalize through feed pipe, and waste gas gets into water scrubber and through being scattered in the water with the microvesicle form behind the washing gas distributor, discharge through discharge nozzle the back of rising;
2) the oil product feed pipe on desulfurizing tower top is sent into the oil product of design discharge continuously; The liquid level of control desulfurizing tower makes the oil product discharge nozzle see the oil product that equates flow off; And the linear velocity that oil product is flowed downward is 0.005-0.05m/s, and said oil product is gasoline, naphtha or diesel oil;
3) waste gas in the discharge nozzle is connected to desulfurizing tower, wherein contains 5000-20000mg/m approximately
3Disulphide; Waste gas is dispersed into the bubble of 1-3mm diameter through the processed gas distributor in the desulfurizing tower, and the reverse linear velocity with 0.01-0.1m/s of waste gas bubble rises, when bubble during through the wire packing section by cutting repeatedly; Make bubble break, with the contact area increasing of oil product; And
4) after the disulphide in the waste gas bubble was extracted in the oil product, the waste gas bubble rose to the demister place, discharged through exhaust pipe again.
Beneficial effect of the present invention is: the present invention adopts gas distributor, thoroughly remove carrying alkali lye in the waste gas secretly, simultaneously behind the oil product adsorption desulfurize with waste gas in contained disulphide be reduced to 200mg/m
3, simultaneously adsorption desulfurize jar middle part adopt the wire packing section can be further with waste gas in disulphide reduce to minimumly, the waste gas after the processing can pass through 15m chimney discharging directly into atmosphere, the sour product of generation can be sent to hydrotreatment.
Description of drawings
According to accompanying drawing the present invention is done further explain below.
Fig. 1 is a kind of structural representation that contains the desulfurizer of disulphide waste gas of embodiments of the invention;
Among the figure:
1, water scrubber; 11, washing gas distributor; 12, feed pipe; 13, wastewater discharge pipe; 14, discharge nozzle; 2, desulfurizing tower; 21, processed gas distributor; 22, wire packing section; 23, oil product feed pipe; 24, oil product discharge nozzle; 25, demister; 26, exhaust pipe.
The specific embodiment
As shown in Figure 1; The described a kind of desulfurizer that contains disulphide waste gas of the embodiment of the invention; Comprise water scrubber 1 and desulfurizing tower 2; Water scrubber 1 outside is provided with feed pipe 12, is positioned at feed pipe 12 porch in the water scrubber 1 and is provided with washing gas distributor 11, and the top of water scrubber 1 and bottom are respectively equipped with discharge nozzle 14 and wastewater discharge pipe 13; Said desulfurizing tower 2 outer lower portion are connected with discharge nozzle 14; Be provided with processed gas distributor 21 in discharge nozzle 14 porch in the desulfurizing tower 2; Desulfurizing tower 2 tops are provided with demister 25; Desulfurizing tower 2 middle parts are provided with wire packing section 22, and the top of desulfurizing tower 2 and bottom are respectively equipped with exhaust pipe 26 and oil product discharge nozzle 24, and said demister 25 tops are provided with oil product feed pipe 23.
Utilize the described a kind of sulfur method that contains the desulfurizer of disulphide waste gas of the embodiment of the invention, may further comprise the steps:
1) waste gas gets into water scrubber 1 dealkalize through feed pipe 12, and waste gas gets into water scrubber 1 and is scattered in the water with the microvesicle form through washing gas distributor 11 backs, and discharge through discharge nozzle 14 back of rising;
2) the oil product feed pipe 23 on desulfurizing tower 2 tops is sent into the oil product of design discharge continuously; The liquid level of control desulfurizing tower 2 makes oil product discharge nozzle 24 see the oil product that equates flow off; And the linear velocity that oil product is flowed downward is 0.005-0.05m/s, and said oil product is gasoline, naphtha or diesel oil;
3) waste gas in the discharge nozzle 14 is connected to desulfurizing tower 2, wherein contains 5000-20000mg/m approximately
3Disulphide; Waste gas is dispersed into the bubble of 1-3mm diameter through the processed gas distributors 21 in the desulfurizing tower 2, and the reverse linear velocity with 0.01-0.1m/s of waste gas bubble rises, when bubble during through wire packing section 22 by cutting repeatedly; Make bubble break, with the contact area increasing of oil product; And
4) after the disulphide in the waste gas bubble was extracted in the oil product, the waste gas bubble rose to demister 25 places, discharged through exhaust pipe 26 again.
Application example
China chemical industry company uses a kind of desulfurizer that contains disulphide waste gas shown in the embodiment of the invention, Design Treatment amount 80Nm
3/ sulphur-containing exhaust gas that hour alkali liquor oxidized regeneration produces, when year goes into operation several 8000 hours, tail gas disulphide content 10000-20000mg/m
3, adopt a kind of desulfurizer that contains disulphide waste gas after, waste gas total sulfur≤200mg/m
3, the disulphide removal efficiency installs stable, safety on average more than 95% in the waste gas; Environmental benefit is obvious; The disulphide removal efficiency is high in the waste gas, and the alkaline sewage discharging is few, changes 1.5 tons of demineralized waters every month.
Though below only described specific embodiment example of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited appended claims.Those skilled in the art can make numerous variations or modification to these embodiments under the prerequisite that does not deviate from principle of the present invention and essence, but these changes or modification all fall into protection scope of the present invention.
Claims (3)
1. desulfurizer that contains disulphide waste gas; Comprise water scrubber (1) and desulfurizing tower (2); Water scrubber (1) outside is provided with feed pipe (12); It is characterized in that: be positioned at feed pipe (12) porch in the water scrubber (1) and be provided with washing gas distributor (11), the top of water scrubber (1) and bottom are respectively equipped with discharge nozzle (14) and wastewater discharge pipe (13); Said desulfurizing tower (2) outer lower portion is connected with discharge nozzle (14); Be provided with processed gas distributor (21) in discharge nozzle (14) porch in the desulfurizing tower (2); Desulfurizing tower (2) top is provided with demister (25); Desulfurizing tower (2) middle part is provided with wire packing section (22), and the top of desulfurizing tower (2) and bottom are respectively equipped with exhaust pipe (26) and oil product discharge nozzle (24), and said demister (25) top is provided with oil product feed pipe (23).
2. one kind contains the disulphide exhaust gas desulphurization method, it is characterized in that it may further comprise the steps:
1) waste gas gets into water scrubber (1) dealkalize through feed pipe (12), and waste gas gets into water scrubber (1) and is scattered in the water with the microvesicle form through washing gas distributor (11) back, and discharge through discharge nozzle (14) back of rising;
2) the oil product feed pipe (23) on desulfurizing tower (2) top is sent into the oil product of design discharge continuously; The liquid level of control desulfurizing tower (2) makes oil product discharge nozzle (24) see the oil product that equates flow off, and the linear velocity that oil product is flowed downward is 0.005-0.05m/s;
3) waste gas in the discharge nozzle (14) is connected to desulfurizing tower (2), wherein contains 5000-20000mg/m approximately
3Disulphide; Waste gas is dispersed into the bubble of 1-3mm diameter through the processed gas distributor (21) in the desulfurizing tower (2); The reverse linear velocity with 0.01-0.1m/s of waste gas bubble rises;, bubble, make bubble break when passing through wire packing section (22), with the contact area increasing of oil product by cutting repeatedly; And
4) after the disulphide in the waste gas bubble was extracted in the oil product, the waste gas bubble rose to demister (25) and locates, and discharged through exhaust pipe (26) again.
3. a kind of disulphide exhaust gas desulphurization method that contains according to claim 2, it is characterized in that: said oil product is gasoline, naphtha or diesel oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210174207.1A CN102698574B (en) | 2012-05-30 | 2012-05-30 | Desulfurizing method for disulfide-containing waste gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210174207.1A CN102698574B (en) | 2012-05-30 | 2012-05-30 | Desulfurizing method for disulfide-containing waste gas |
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| Publication Number | Publication Date |
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| CN102698574A true CN102698574A (en) | 2012-10-03 |
| CN102698574B CN102698574B (en) | 2015-01-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624019A (en) * | 2013-11-13 | 2015-05-20 | 中国石油天然气股份有限公司 | Treatment method for alkali liquor oxidation regeneration tail gas containing mercaptide |
| CN107983134A (en) * | 2018-01-30 | 2018-05-04 | 重庆坤泉环境工程有限公司 | Gas purification tower and exhaust gas purification equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101940872A (en) * | 2010-07-21 | 2011-01-12 | 宁波中一石化科技有限公司 | System and method for removing disulfide from regeneration exhaust gas of caustic fluid used in liquid gas sweetening process |
| CN101962566A (en) * | 2009-07-21 | 2011-02-02 | 宁波中一石化科技有限公司 | Mercaptan removed alkali liquid oxidation regeneration method and device thereof |
| CN202740993U (en) * | 2012-05-30 | 2013-02-20 | 中国石油化工股份有限公司 | Desulphurization device for waste gas containing disulfide |
-
2012
- 2012-05-30 CN CN201210174207.1A patent/CN102698574B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962566A (en) * | 2009-07-21 | 2011-02-02 | 宁波中一石化科技有限公司 | Mercaptan removed alkali liquid oxidation regeneration method and device thereof |
| CN101940872A (en) * | 2010-07-21 | 2011-01-12 | 宁波中一石化科技有限公司 | System and method for removing disulfide from regeneration exhaust gas of caustic fluid used in liquid gas sweetening process |
| CN202740993U (en) * | 2012-05-30 | 2013-02-20 | 中国石油化工股份有限公司 | Desulphurization device for waste gas containing disulfide |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624019A (en) * | 2013-11-13 | 2015-05-20 | 中国石油天然气股份有限公司 | Treatment method for alkali liquor oxidation regeneration tail gas containing mercaptide |
| CN107983134A (en) * | 2018-01-30 | 2018-05-04 | 重庆坤泉环境工程有限公司 | Gas purification tower and exhaust gas purification equipment |
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| Publication number | Publication date |
|---|---|
| CN102698574B (en) | 2015-01-07 |
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