CN103752148A - Desulfurization system for removing sulfides based on thiobacillusthioparus - Google Patents
Desulfurization system for removing sulfides based on thiobacillusthioparus Download PDFInfo
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- CN103752148A CN103752148A CN201410042892.1A CN201410042892A CN103752148A CN 103752148 A CN103752148 A CN 103752148A CN 201410042892 A CN201410042892 A CN 201410042892A CN 103752148 A CN103752148 A CN 103752148A
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- subsider
- bioreactor
- absorption tower
- tower body
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a desulfurization system for removing sulfides based on thiobacillusthioparus. The desulfurization system is characterized by consisting of six parts including an absorption tower, a biological reactor, a settling tank, a barren solution tank, an alkali solution tank and a sulfur foam tank, wherein the absorption tower comprises a tower body; a gas inlet pipe is arranged on the left lower side of the tower body; a gas outlet pipe is arranged at the upper end of the tower body; one section of step-shaped filler layer is arranged above the gas inlet pipe in the tower body of the absorption tower; stainless steel nets are arranged at the upper and lower ends of the filler layer for fixing and supporting the upper and lower ends of the filler layer; an absorbent inlet is formed in the left side of the upper part of the filler layer; a foam remover is arranged above the absorbent inlet; a clear water pipe for back washing is arranged above the foam remover. Compared with the existing systems for desulfurizing with biological methods, the desulfurization system has the advantages of high processing efficiency, stable operation, extensive use and more science and practicability.
Description
Technical field
The present invention relates to a kind of desulphurization system, relate in particular to a kind of desulphurization system of removing sulfide based on grate sulfur thiobacillus.
Background technology
Hydrogen sulfide (H
2s) can not only make that carbon steel produces that hydrogen embrittlement, hydrogen split, hydrogen blister and stress corrosion causes the destruction of e-quipment and pipe to damage, also many technical process are exerted an adverse impact.H in urea synthesis process
2s and urea generate sulphur urine [CS (NH
2)], pollute urea product, reduce urea quality.General Requirements raw material CO
2h in gas
2s content must not exceed 15mg/m
3(water solution total cycling method) and≤5mg/m
3(vaporizing extract process).According to international beverage association criterion (ISBT) CO
2h in gas
2s≤0.1ppmv.Manufacture the raw material CO of dry ice
2require H
2s content is no more than 30ppm.H in soda ash production process
2s brings the iron sulfide of carbonization system generation indissoluble into, causes soda ash blackening, stops up filter cloth, harm alkali producing process.The CO producing for joining alkali
2require H
2s content is at 50mg/m
3below.In different field such as biogas, natural gas, synthesis gas (coal hydrogen manufacturing, coal methyl alcohol processed), refinery tail-gas, paper-making industries, all need desulfurization.
Current removal H
2s mainly adopts chemical method: adopt the dry desulfurization of iron oxide, the alkali desulphurization of alkali liquor absorption, the liquid phase catalytic oxidation desulfurization such as ADA method, tannin extract method, arsenic alkaline process, PDS method.Chemical desulfurization shortcoming processing cost is high, produces secondary pollution.In addition, for natural gas and refinery tail-gas etc., extensive gas sweetening can adopt the desulfurization of Clause method, Clause desulfurization process complexity, and also vent gas treatment needs the reducing gas such as H2 and CO.
Holland Paques company attempts application biological desulfurization process for biogas for 1993 in engineering.Biological desulfurization process is mainly comprised of two parts: in absorption tower, adopt akaline liquid H in biogas
2s elutes; In bioreactor, absorption liquid medium sulphide content is oxidized to elemental sulfur.For large-scale biogas engineering, can also further reclaim elemental sulfur.Shell Co. Ltd in 1997 cooperate further to promote the application of biological desulfurizing technology with Paques B. V., within 2002, biological desulphurization is successfully applied to selexol process.Shell, Parker, the cooperation of American UOP company in 2004 are applied to refinery tail-gas processing biological desulfurizing technology.U.S. NATCO company in 2008 and Paques B. V.'s cooperative promotion biological desulfurizing technology.
Biological desulphurization can sulfide oxidation microorganism be mainly (grate sulfur thiobacillus): thread sulfur bacteria, photosynthetic sulfur bacteria and colorless sulfur bacteria, wherein major part belongs to chemosynthetic autotroph.Research shows, most colorless sulfur bacterias are with O
2(or NO
3 -) as electron acceptor, and external desulphurization.Colorless sulfur bacteria to the oxidation rate of sulfide with ability compared with photosynthetic sulfur bacteria, a little less than being subject to the restriction of Growth of Cells, colorless sulfur bacteria, can be almost without obvious growth in the situation that when the restricted and sulfide of nutriment is enough, efficiently by the even elemental sulfur oxidation outside born of the same parents of sulfide.The every growth of photosynthetic sulfur bacteria 1g bacterial cell can produce 1-2g elemental sulfur and compare, and the every growth of colorless sulfur bacteria 1g bacterial cell at least can produce 20g elemental sulfur.Visible, biological desulphurization adopts colorless sulfur bacteria to have higher efficiency, and easily reclaims the elemental sulfur generating.
The sulfur method that bioanalysis is removed hydrogen sulfide has following superiority: (1) is without catalyst, beyond deacration, without other oxidant; (2) energy consumption is low, does not produce secondary pollution; (3) the biological sludge amount producing is few, does not produce chemical sludge; (4) recyclable elemental sulfur, sulfate or the thiosulfate of generation are few.
The problems such as that current bioanalysis removes that desulphurization system that hydrogen sulfide technology used exists that desulfuration efficiency is poor, sulfide oxidation produces is poor containing elemental sulfur sludge settling, aeration tower easily stops up, floor space is large compared with chemical desulfurization, desulphurization cost is high, fluctuation of service, purposes are single.
Summary of the invention
In order to solve the existing weak point of above-mentioned technology, the invention provides a kind of desulphurization system of removing sulfide based on grate sulfur thiobacillus.
In order to solve above technical problem, the technical solution used in the present invention is: a kind of desulphurization system of removing sulfide based on grate sulfur thiobacillus, and it is comprised of absorption tower, bioreactor, subsider, lean solution groove, lye tank (vat) and sulphur foam groove six major parts;
There is a tower body on absorption tower, and the left side of tower body is on the lower side to be provided with air inlet pipe, a upper end and to be provided with an escape pipe, in the tower body on absorption tower air inlet pipe above have one section of stairstepping packing layer;
The top and bottom of packing layer all have stainless (steel) wire to be fixed and support it, and the left side, top of packing layer is provided with absorption liquid entrance, and the top of absorption liquid entrance is provided with a demister; The clear water pipe that demister top is used during for backwash.
The below, left side of absorption tower tower body is provided with a blast pipe; The front end below of air inlet pipe is provided with the condensate water collecting groove for receiving the condensate water producing when biogas temperature reduces; One side of condensate water collecting groove is provided with condensate water discharge.
The below, right side on absorption tower is provided with return duct, and absorption tower is connected with the feed tube in bioreactor left side by return duct.
Between bioreactor and lean solution groove, be provided with sulphur foam groove; Between described bioreactor and subsider, be provided with downflow weir and subsider feed tube;
Between lean solution groove and subsider, be provided with downflow weir and subsider discharging tube; Lean solution groove passes through peripheral hardware variable frequency pump by pipeline is connected with the absorption liquid entrance of tower body right side, absorption tower demister below.
Desulfurizing bacteria in bioreactor is grate sulfur thiobacillus; The soft combined stuffing of Fiber Materials half is housed in bioreactor.
Liquid in bioreactor flows automatically and enters in subsider after downflow weir, subsider feed tube; In subsider, be provided with hexagon cellular inclined tube.
In lean solution groove, be provided with online salinity measurement and control device; Lean solution groove is provided with a variable frequency pump outward.
Compared with the system that the present invention uses with existing biological method desulfurization, there is treatment effeciency high, stable, of many uses etc. a little, science practicality more.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the A-A face cutaway view of Fig. 1.
In figure: 1, absorption tower; 2, return duct; 3, blast pipe; 4, condensate water collecting groove; 5, air inlet pipe; 6, stairstepping packing layer; 7, condensate water discharge; 8, absorption liquid entrance; 9, demister; 10, clear water pipe; 11, escape pipe; 12, bioreactor; 13, downflow weir; 14, subsider feed tube; 15, bioreactor feed tube; 16, subsider; 17, hexagon cellular inclined tube; 18, subsider discharging tube; 19, lean solution groove; 20, lye tank (vat); 21, measuring pump; 22, sulphur foam groove; 23, variable frequency pump;
The specific embodiment
As shown in Figure 1 and Figure 2, the present invention is comprised of absorption tower 1, bioreactor 12, subsider 16, lean solution groove 19, lye tank (vat) 20 and sulphur foam groove 22 6 major parts.
There is a tower body on absorption tower 1, the left side of tower body is on the lower side to be provided with air inlet pipe 5, a upper end and to be provided with an escape pipe 11, in the tower body on absorption tower air inlet pipe 5 above have one section of stairstepping packing layer 6, the top and bottom of packing layer 6 all have stainless (steel) wire to be fixed and support it, the left side, top of packing layer 6 is provided with absorption liquid entrance 8, the top of absorption liquid entrance 8 is provided with a demister 9, the clear water pipe 10 of using when demister 9 tops are backwash.The below, left side of absorption tower 1 tower body is provided with a blast pipe 3.
Sweetening process of the present invention is as follows:
Need the gas of processing to enter from the air inlet pipe 5 on absorption tower, gas enters reverse contact of aobvious alkaline absorption solution that stairstepping packing layer 6 sprays with the water-distributing device at top, absorption tower after being uniformly distributed by the distribution device in absorption tower, the hydrogen sulfide gas in gas is absorbed by liquid absorption.Having removed the gas of hydrogen sulfide discharges from the blast pipe 3 on absorption tower.Every day, while changing certain proportion absorption liquid with clear water, clear water was squeezed into from absorption liquid entrance 8, realizes stairstepping filler 6 is rinsed, and prevented that filler from stopping up.Below the front end of air inlet pipe 5, be provided with the condensate water collecting groove 4 for receiving the condensate water producing when biogas temperature reduces; One side of condensate water collecting groove 4 is provided with condensate water discharge 7.
The below, right side on absorption tower 1 is provided with return duct 2, and absorption tower 1 is connected with the feed tube 15 in bioreactor 12 left sides by return duct 2.Between bioreactor 12 and lean solution groove 19, be provided with sulphur foam groove 22.Between bioreactor 12 and subsider 16, be provided with downflow weir 13 and subsider feed tube 14; Between lean solution groove 19 and subsider 16, be provided with downflow weir 13 and subsider discharging tube 18.Lean solution groove 19 passes through peripheral hardware variable frequency pump 23 by pipeline is connected with the absorption liquid entrance 8 of 1 demister 9 belows, tower body right side, absorption tower.Desulfurizing bacteria in bioreactor 12 is grate sulfur thiobacillus.
From absorption tower 1 absorption liquid out by gravity flow by return duct 2 in bioreactor feed tube 15 enters bioreactor 12, the interior installation combined stuffing of bioreactor 12 (the soft combined stuffing of Fiber Materials half), grate sulfur thiobacillus on filler in biomembrane is oxidized to elemental sulfur the sulfide in absorption liquid, generate hydroxyl, part elemental sulfur is further oxidized to sulfate radical simultaneously.In bioreactor 12, be provided with back purge system, regularly filler carried out to backwash, upgrade grate sulfur thiobacillus in biomembrane.In bioreactor 12, be provided with sulphur foam and discharge system, the sulphur foam of generation enters in time in sulphur foam groove 22 and collects.In-built online dissolved oxygen (DO) instrument that is equipped with of bioreactor 12, by regulating the DO of aeration control solution.In bioreactor, establish heater, fluid temperature is controlled at 20-30 ℃.
Liquid in bioreactor 12 flows automatically and enters in subsider 16 after downflow weir 13, subsider feed tube 14, in subsider 16, be provided with hexagon cellular inclined tube 17, for strengthening the effect of settling of absorption liquid sulfur-bearing biological sludge, regularly discharge containing the biological sludge of elemental sulfur subsider 16 bottoms, and elemental sulfur is processed or reclaimed in mud outward transport after dehydration.Supernatant is entered in lean solution groove 19 by subsider discharging tube 18 through downflow weir 14, lean solution groove 19 tops are provided with lye tank (vat) 20, in lye tank (vat) 20, be provided with measuring pump 21, regularly in lye tank (vat) 20, add alkali lye, by measuring pump 21, add in lean solution groove, maintain the pH of absorption liquid in lean solution groove 19 between 7.4-8.4, thereby guarantee the removal efficiency of hydrogen sulfide in gas.In lean solution groove 19, be also provided with online salinity measurement and control device, the salinity of absorption liquid maintains 1-3%.Lean solution groove 19 is outer is provided with a variable frequency pump 23, and absorption liquid is circulated to absorption tower.
Claims (8)
1. a desulphurization system of removing sulfide based on grate sulfur thiobacillus, is characterized in that: it is comprised of absorption tower, bioreactor, subsider, lean solution groove, lye tank (vat) and sulphur foam groove six major parts;
There is a tower body on described absorption tower, and the left side of tower body is on the lower side to be provided with air inlet pipe, a upper end and to be provided with an escape pipe, in the tower body on absorption tower air inlet pipe above have one section of stairstepping packing layer;
The top and bottom of described packing layer all have stainless (steel) wire to be fixed and support it, and the left side, top of packing layer is provided with absorption liquid entrance, and the top of absorption liquid entrance is provided with a demister; The clear water pipe that described demister top is used during for backwash.
2. the desulphurization system of removing sulfide based on grate sulfur thiobacillus according to claim 1, is characterized in that: the below, left side of described absorption tower tower body is provided with a blast pipe; The front end below of described air inlet pipe is provided with the condensate water collecting groove for receiving the condensate water producing when biogas temperature reduces; One side of described condensate water collecting groove is provided with condensate water discharge.
3. the desulphurization system of removing sulfide based on grate sulfur thiobacillus according to claim 1, is characterized in that: the below, right side on described absorption tower is provided with return duct, and absorption tower is connected with the feed tube in bioreactor left side by return duct.
4. the desulphurization system of removing sulfide based on grate sulfur thiobacillus according to claim 1, is characterized in that: between described bioreactor and lean solution groove, be provided with sulphur foam groove; Between described bioreactor and subsider, be provided with downflow weir and subsider feed tube.
5. the desulphurization system of removing sulfide based on grate sulfur thiobacillus according to claim 1, is characterized in that: between described lean solution groove and subsider, be provided with downflow weir and subsider discharging tube; Described lean solution groove passes through peripheral hardware variable frequency pump by pipeline is connected with the absorption liquid entrance of tower body right side, absorption tower demister below.
6. the desulphurization system of removing sulfide based on grate sulfur thiobacillus according to claim 1, is characterized in that: the desulfurizing bacteria in described bioreactor is grate sulfur thiobacillus; The soft combined stuffing of Fiber Materials half is housed in described bioreactor.
7. the desulphurization system of removing sulfide based on grate sulfur thiobacillus according to claim 1, is characterized in that: the liquid in described bioreactor flows automatically and enters in subsider after downflow weir, subsider feed tube; In described subsider, be provided with hexagon cellular inclined tube.
8. the desulphurization system of removing sulfide based on grate sulfur thiobacillus according to claim 1, is characterized in that: in described lean solution groove, be provided with online salinity measurement and control device; Described lean solution groove is provided with a variable frequency pump outward.
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| CN201410042892.1A CN103752148A (en) | 2014-01-29 | 2014-01-29 | Desulfurization system for removing sulfides based on thiobacillusthioparus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975342A (en) * | 2017-05-11 | 2017-07-25 | 中国科学院过程工程研究所 | A kind of biological desulphurization system and biological flue gas sulfur method |
| CN109126410A (en) * | 2018-11-02 | 2019-01-04 | 山西资环科技股份有限公司 | A kind of biological desulfurization process for biogas |
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| CN102807960A (en) * | 2011-06-03 | 2012-12-05 | 中国科学院过程工程研究所 | Alkali-resistant thhiobacillus thioparus and application thereof |
| CN103071378A (en) * | 2013-01-11 | 2013-05-01 | 中国科学院广州能源研究所 | Two-stage biological desulfuration device of marsh gas |
| US20130115672A1 (en) * | 2011-11-08 | 2013-05-09 | National Chiao Tung University | Biological composite and method for reducing h2s |
| CN203694893U (en) * | 2014-01-29 | 2014-07-09 | 北京润夏环境技术有限公司 | Thiobacillusthioparus-based desulphurization system to remove sulfide |
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2014
- 2014-01-29 CN CN201410042892.1A patent/CN103752148A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202087237U (en) * | 2011-05-25 | 2011-12-28 | 山西阳煤丰喜肥业(集团)有限责任公司 | Self-suction type air oxidation regenerating desulfurization device |
| CN102807960A (en) * | 2011-06-03 | 2012-12-05 | 中国科学院过程工程研究所 | Alkali-resistant thhiobacillus thioparus and application thereof |
| US20130115672A1 (en) * | 2011-11-08 | 2013-05-09 | National Chiao Tung University | Biological composite and method for reducing h2s |
| CN103071378A (en) * | 2013-01-11 | 2013-05-01 | 中国科学院广州能源研究所 | Two-stage biological desulfuration device of marsh gas |
| CN203694893U (en) * | 2014-01-29 | 2014-07-09 | 北京润夏环境技术有限公司 | Thiobacillusthioparus-based desulphurization system to remove sulfide |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975342A (en) * | 2017-05-11 | 2017-07-25 | 中国科学院过程工程研究所 | A kind of biological desulphurization system and biological flue gas sulfur method |
| CN109126410A (en) * | 2018-11-02 | 2019-01-04 | 山西资环科技股份有限公司 | A kind of biological desulfurization process for biogas |
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