CN1810350A - Tail gas desulfurizing tanning extract process for viscose fiber production - Google Patents
Tail gas desulfurizing tanning extract process for viscose fiber production Download PDFInfo
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- CN1810350A CN1810350A CN 200510038264 CN200510038264A CN1810350A CN 1810350 A CN1810350 A CN 1810350A CN 200510038264 CN200510038264 CN 200510038264 CN 200510038264 A CN200510038264 A CN 200510038264A CN 1810350 A CN1810350 A CN 1810350A
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Abstract
The tail gas desulfurizing tanning extract process for viscose fiber production includes: adding pre-treated tanning extract aqua and other components into the lean liquor tank to form alkali tanning extract desulfurizing liquid, pumping the desulfurizing liquid to absorption tower to absorb most of the hydrogen sulfide from the tail gas, pressurizing the absorbed desulfurizing liquid with rich liquor pump and spraying to the regenerating tower, leading the regenerated desulfurizing liquid from the regenerating tower to lean liquor tank and pumping into the absorption tower for reuse, spraying the desulfurizing liquid in the sprayer to oxidize hydrogen sulfide into sulfur, floating the sulfur to the upper part of the regenerating tower to form sulfur foam flowing to the sulfur foam tank, pumping the sulfur foam to sulfur melting reactor to produce sulfur product, and returning the separated solution to the lean liquor tank for reuse.
Description
Technical field
The present invention relates to a kind of sulfur removal technology, be applied to the desulfurizing tanning extract process that viscose rayon is produced tail gas specifically.
Background technology
Hydrogen sulfide is the harmful substances that mainly contains in the viscose rayon manufacturing enterprise tail gas, still not a kind of main foul gas of hydrogen sulfide, and human body had bigger injury.For removing hydrogen sulfide, many methods had been adopted, in " staple fibre " first phase magazine of publishing in February, 2000 the multiple removal methods of hydrogen sulfide in the viscose rayon production tail gas is introduced, the processing concentration of hydrogen sulfide that has in these methods is on the low side, generally is lower than 4g/m
3, the method investment that has is bigger, and the introduction expense of single covering device reaches 5,000,000 dollars, and the hydrogen sulfide in the therefore at present domestic viscose rayon manufacturing enterprise tail gas does not process basically, and tail gas directly discharges.
At present, domestic is that the gas making producer of raw material generally adopts " tannin extract method " to remove hydrogen sulfide wherein with coal or natural gas.Alkaline tannin extract solution is promptly used in so-called " tannin extract method " desulfurization, removes the technical process of hydrogen sulfide from gas.Tannin extract is the polyphosphazene polymer aldehydes matter, key component is a tannin, next also has non-tannin and water-insoluble, the mixture that tannin is made up of the compound of various chemical constitutions, contain a large amount of more active phenolic hydroxyl group and hydroxyls in its structure, has stronger ability to take oxygen, in the cyclic process of desulfurization-regeneration, it is a kind of good oxygen carrier, can play network and effect to metal again, generate water-soluble more stable network and thing, no matter this sulfur method is the gas cleaning degree, the sulfur capacity of solution, still several leading indicators such as the production rate of side reaction product and sulfur recovery rate all be more satisfactory, and the most outstanding advantage cannot not be exactly stifledly tower, thereby can improve desulfuration efficiency by in the absorption tower, installing filler additional, reach the purpose of cleaner production.
Produce the desulfurization needs of tail gas for satisfying viscose rayon, above-mentioned " tannin extract method " is used for the production tail gas desulfurization of my company.Be the gas making factory of raw material with coal or natural gas, the desulfurization regeneration of part enterprise adopts high tower regeneration at present, and the oxidation regeneration ability of solution is relatively poor, and the tannin in the solution can not get abundant regeneration, forms colloidal state, makes sulfur granules separation difficulty in the solution; High tower regeneration, regenerator is bulky, and has increased the manufacturing expense of equipment; Air rises to cat head at the bottom of by regenerator, and distribution of gas is inhomogeneous, produces channeling, makes the sulphur that bears again have part not flotated, and a large amount of sulphur sink at the bottom of the tower.
The objective of the invention is to overcome the problems referred to above, a kind of desulfurizing tanning extract process that is applicable to the tail gas desulfurization of viscose rayon manufacturing enterprise is provided.
Summary of the invention
The objective of the invention is to realize by following technical process: the tannin extract aqueous solution that preliminary treatment is good and other component join the lean solution groove and make tannin extract desulfurizing solution, tannin extract desulfurizing solution in the lean solution groove is squeezed into the absorption tower with lean pump, doctor solution is in liquid distribution trough sprays into tower, producing tail gas with viscose rayon contacts, absorb the most of hydrogen sulfide in the tail gas, the doctor solution that has absorbed hydrogen sulfide enters regenerator through rich solution pump pressurization back by injector; The doctor solution that regeneration is good is drawn by regenerator top and is entered the lean solution groove, sends the absorption tower back to lean pump to recycle; In injector, doctor solution produces local decompression by nozzle at a high speed, air is sucked, doctor solution fully mixes with air, finish reaction in the short period of time, the oxidized generation sulphur of hydrogen sulfide, sulphur is by the top formation sulphur foam of flotation to regenerator, the flotation cell of sulphur foam through regenerator top overflows and flows into the sulphur foam tank, sulphur foam in the sulphur foam tank is squeezed into sulfur melting kettle with the sulphur foam pump and is separated, isolated sulphur is made commodity sulphur, enters the lean solution groove through the isolated solution of sulfur melting kettle and recycles; Above-mentioned tannin extract aqueous solution preliminary treatment is that tannin extract and soda ash are added in the preparation vessel by mass ratio 1: 4--6, is dissolved in water, and uses steam and air-slake then, and temperature is controlled at 80-90 ℃, and constant temperature was finished slaking more than 10 hours; The proportioning of above-mentioned tannin extract desulfurizing solution is: tannin extract is 0.5-2g/l, and sodium metavanadate is 0.4-2g/l, and pH value is 8-10.
When the preliminary treatment of the tannin extract aqueous solution, for accelerating slaking speed, can add a spot of NaOH, addition is the 5-15% of tannin extract addition.
Tannin extract desulfurizing solution can consume a part of tannin extract, soda ash and sodium metavanadate in cyclic process, tannin extract and sodium metavanadate can add by preparation vessel, and soda ash can directly add the lean solution groove.
For guaranteeing the regeneration effect of doctor solution, the speed of doctor solution nozzle in by injector is 12-30m/s.
The present invention carries out jet regeneration by the injector that is installed on the regenerator, makes solution and inhaled air Forced Mixing in injector, makes solution holomorphosis successfully; Adopt jet regeneration, reduce the volume of regenerator significantly, the volume of regenerator reduces 50-60%, thereby reduces the manufacturing expense of equipment; Porous plate is installed in regenerator, and the number of plies of porous plate evenly distributes the air in the regenerator at 1 to 5 layer, reduces bubble diameter, prevents the generation of channeling, strengthens the flotation effect of sulphur.
The desulfurization that technology of the present invention is used for viscose rayon production tail gas has following advantage: 1, absorptivity height, and the average absorption rate can reach more than 98%; 2, do not have stifled tower phenomenon, the clear tower that need not stop has prolonged the production run cycle; 3, can remove the hydrogen sulfide of producing higher concentration in the tail gas, concentration of hydrogen sulfide is at 0--30g/m in the production tail gas
3Between all can handle.4, poisonous and hazardous hydrogen sulfide is transformed the commodity sulphur that generation can utilize again, has certain economic benefits.
Description of drawings
Be accompanying drawing of the present invention below.
Figure one is a process chart of the present invention
Figure two is the injector figure among the present invention
The specific embodiment
Embodiment:
100kg tannin extract, 500kg soda ash and 10kg NaOH are added the tannin extract preparation vessel, add in the groove and produce water 4m
3Open steam control temperature then at 80-90 ℃, opening compressed air stirs, adjust steam flow to guarantee curing temperature, the curing time is 11 hours, after the tannin extract slaking is finished it is driven into the lean solution groove with pump, adding soda ash and vanadic anhydride are prepared into tannin extract desulfurizing solution in the lean solution groove, the proportioning of tannin extract desulfurizing solution is: tannin extract is 1.1-1.2g/l, and sodium metavanadate is 0.9-1.0g/l, and pH value is 8.5-9; Tannin extract desulfurizing solution in the lean solution groove is squeezed into the absorption tower with lean pump, doctor solution is in liquid distribution trough sprays into tower, produce tail gas with viscose rayon and contact, absorb the most of hydrogen sulfide in the tail gas, the solution that is come out by the bottom, absorption tower enters regenerator through rich solution pump pressurization back by injector; The doctor solution that regeneration is good is drawn by regenerator top and is entered the lean solution groove, sends the absorption tower back to lean pump to recycle; Doctor solution remains on 18-22m/s by the speed of nozzle, the airborne dioxygen oxidation that the hydrogen sulfide that absorbs is inhaled into is a sulphur, sulphur is by the top formation sulphur foam of flotation to regenerator, the sulphur foam overflows through flotation cell and flows into the sulphur foam tank, the sulphur foam pump is driven into sulfur melting kettle with the sulphur foam of sulphur foam tank and separates, isolated sulphur is made commodity sulphur, and isolated solution is sent the lean solution groove back to and recycled.
Claims (6)
1, a kind of tail gas desulfurizing tanning extract process for viscose fiber production, it is characterized in that: the tannin extract aqueous solution that preliminary treatment is good and other component join the lean solution groove, make tannin extract desulfurizing solution, doctor solution in the lean solution groove is squeezed into the absorption tower with lean pump, producing tail gas with viscose rayon contacts, absorb the most of hydrogen sulfide in the tail gas, the doctor solution that has absorbed hydrogen sulfide enters regenerator through rich solution pump pressurization back by injector; The doctor solution that regeneration is good is drawn by regenerator top and is entered the lean solution groove, sends the absorption tower back to lean pump again to recycle; The sulphur foam on regenerator top overflows through flotation cell and flows into the sulphur foam tank, and the sulphur foam in the sulphur foam tank is squeezed into sulfur melting kettle with the sulphur foam pump and separated, and isolated sulphur is made commodity sulphur; Entering the lean solution groove through the isolated solution of sulfur melting kettle recycles.
2, sulfur removal technology according to claim 1, it is characterized in that: the preliminary treatment of the described tannin extract aqueous solution is that tannin extract and soda ash are added in the preparation vessel by mass ratio 1: 4-6, be dissolved in water, use steam and air-slake then, temperature is controlled at 80-90 ℃, and constant temperature was finished slaking more than 10 hours.
3, sulfur removal technology according to claim 1 is characterized in that: the proportioning of described tannin extract desulfurizing solution is: tannin extract is 0.5-2g/l, and sodium metavanadate is 0.4-2g/l, and pH value is 8-10.
4, sulfur removal technology according to claim 1 is characterized in that: the doctor solution that has absorbed hydrogen sulfide passes through when the pressurization of rich solution pump is back to enter regenerator by injector, and the speed of doctor solution nozzle in by injector is 12-30m/s.
5, according to claim 1 and 2 described sulfur removal technologies, it is characterized in that: the described tannin extract aqueous solution can add a spot of NaOH when preliminary treatment, and addition is the 5-15% of tannin extract addition.
6, sulfur removal technology according to claim 1 is characterized in that: porous plate is installed in the regenerator, and the number of plies of porous plate is at 1 to 5 layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510038264 CN1810350A (en) | 2005-01-28 | 2005-01-28 | Tail gas desulfurizing tanning extract process for viscose fiber production |
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| CN 200510038264 CN1810350A (en) | 2005-01-28 | 2005-01-28 | Tail gas desulfurizing tanning extract process for viscose fiber production |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825878A (en) * | 2010-04-02 | 2010-09-08 | 杭州奥通科技有限公司 | Viscose fiber waste gas treatment control system |
| CN101829492A (en) * | 2010-05-18 | 2010-09-15 | 上海景凯环保科技有限公司 | Chemical absorbent |
| CN102029102A (en) * | 2010-11-11 | 2011-04-27 | 赛鼎工程有限公司 | Desulfurization process and turbulent ball tower |
| CN103495329A (en) * | 2013-10-18 | 2014-01-08 | 庆华集团新疆和丰能源化工有限公司 | Process for removing hydrogen sulfide and recovering sulphur |
| CN105311921A (en) * | 2015-11-09 | 2016-02-10 | 宁波科新化工工程技术有限公司 | Collection and treatment process for tail gas emitted by coking equipment devices |
| CN115178087A (en) * | 2022-07-26 | 2022-10-14 | 北京恒泰源盛高科技有限公司 | Waste gas desulfurization process and equipment |
-
2005
- 2005-01-28 CN CN 200510038264 patent/CN1810350A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825878A (en) * | 2010-04-02 | 2010-09-08 | 杭州奥通科技有限公司 | Viscose fiber waste gas treatment control system |
| CN101825878B (en) * | 2010-04-02 | 2012-03-28 | 郑睿敏 | Viscose fiber waste gas treatment control system |
| CN101829492A (en) * | 2010-05-18 | 2010-09-15 | 上海景凯环保科技有限公司 | Chemical absorbent |
| CN102029102A (en) * | 2010-11-11 | 2011-04-27 | 赛鼎工程有限公司 | Desulfurization process and turbulent ball tower |
| CN103495329A (en) * | 2013-10-18 | 2014-01-08 | 庆华集团新疆和丰能源化工有限公司 | Process for removing hydrogen sulfide and recovering sulphur |
| CN105311921A (en) * | 2015-11-09 | 2016-02-10 | 宁波科新化工工程技术有限公司 | Collection and treatment process for tail gas emitted by coking equipment devices |
| CN115178087A (en) * | 2022-07-26 | 2022-10-14 | 北京恒泰源盛高科技有限公司 | Waste gas desulfurization process and equipment |
| CN115178087B (en) * | 2022-07-26 | 2024-01-16 | 北京恒泰源盛高科技有限公司 | Waste gas desulfurization process and equipment |
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