CN203610025U - Biodesulfurization circulating system of flue gas - Google Patents
Biodesulfurization circulating system of flue gas Download PDFInfo
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- CN203610025U CN203610025U CN201320504920.8U CN201320504920U CN203610025U CN 203610025 U CN203610025 U CN 203610025U CN 201320504920 U CN201320504920 U CN 201320504920U CN 203610025 U CN203610025 U CN 203610025U
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- flue gas
- chemical reaction
- bioreactor
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Abstract
The utility model discloses a biodesulfurization circulating system of flue gas. For overcoming the defects that the functions of continuous system operation and low-cost circulating desulfurization are not provided by the coal-burning flue-gas desulfurization device in the prior art, the utility model provides a system, which can realize desulfurization of the flue gas effectively under the operating conditions of low energy consumption and low cost. The system comprises a chemical reaction device, a solid-liquid separating device and a bioreactor which are sequentially connected by a pipeline, wherein the chemical reaction device is provided with a flue-gas inlet to be connected with a flue-gas input pipeline and is provided with an absorbing-liquid inlet to be connected with an absorbing-liquid input device, and the top part of the chemical reaction device is provided with an opening to be connected with a flue-gas exhausting pipe; the bioreactor is a membrane bioreactor, and a biological membrane is used for fixing iron-oxidizing bacteria; the system contains iron-containing chemical solution which is recycled by the reduction-oxidation process. The biodesulfurization circulating system is also additionally provided with a front-end pretreatment device. The biodesulfurization circulating system disclosed by the utility model has the advantages that the structure is simple and compact, the installation and the use are simple and convenient, the operating energy consumption is low, the cost is low and the requirement for large-scale production can be met.
Description
Technical field
The utility model relates to a kind of system for cleaning fume, particularly relates to a kind of circulating treating system of flue gas desulfurization, belongs to exhaust-gas treatment, field of environment protection.
Background technology
China SO
2discharge ranks first in the world, and annual emissions reaches 2,320 ten thousand tons.At present, SO
2control technology is broadly divided into 4 classes, i.e. flue gas desulfurization and conversion process desulfurization after desulfurization in desulfurization before combustion, combustion, combustion.From current applicable cases, it is generally acknowledged that in the industry the rear flue gas desulfurization of combustion is to control SO
2polluting one of the most effective approach, is also the desulfur technology of unique heavy industrialization application in the world.Traditional desulfur technology based on chemical absorbing catalysis is the mainstream technology of current flue gas desulfurization.But process that product gets nowhere and the operating cost that needs the input of a large amount of chemical substances and energy to cause is high and build difficulty and problems such as investment is large and do not possess the condition of large-scale promotion owing to existing, can only apply among a small circle in some large enterprises of China.In fact most of discharge SO
2medium-sized and small enterprises more need with low cost, highly effective and safe technology for flue gas desulfurization to guarantee qualified discharge.
Granted publication number is CN202366619U, the Chinese utility model patent that name is called " a kind of coal burning flue gas desulphurization unit " discloses a kind of coal burning flue gas desulphurization unit, the air inlet storage tank of this device, deduster, cooling tower, desulfurizing tower, desulfurization bacterium storage tank are connected successively, desulfurization bacterium storage tank is connected with spray equipment by water pump, and spray equipment is positioned at the top of desulfurizing tower.The topmost defect of this device is: on the one hand technology contents disclose unclear, cannot repetition, do not possess practicality; On the other hand, device does not provide that system is moved continuously, the function of low cost circulation desulfurization, and practical cost is high, and applicability is limited.
Utility model content
The purpose of this utility model is exactly for the deficiencies in the prior art, a kind of circulating treating system of flue gas desulfurization is provided, this system with chemical oxidation fix, microbiological oxidation and resource be recovered as main composition, can under low energy consumption, low cost movement condition, effectively realize flue gas desulfurization.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of flue gas biological desulphurization circulatory system, is characterized in that: comprise the chemical reaction equipment, equipment for separating liquid from solid, the bioreactor that connect by pipeline;
The reaction unit discharging tube of described chemical reaction equipment is connected to equipment for separating liquid from solid inlet by the road, chemical reaction equipment has smoke air inlet and connects flue gas intake line, have absorption liquid inlet and connect absorption liquid input unit, top has opening to connect flue gas exhaust pipe;
Described equipment for separating liquid from solid discharging tube is connected to bioreactor feeding device by the road;
Described bioreactor discharging tube is connected to the oxidation solution feeding device of chemical reaction equipment by the road.
In the above-mentioned flue gas biological desulphurization circulatory system, chemical reaction equipment, equipment for separating liquid from solid, bioreactor are the major parts of system.Chemical reaction equipment provides chemical oxidation desulfurization place, system operation is, oxidation solution enters chemical reaction equipment from chemical reaction equipment top oxidation solution feeding device, in chemical reaction equipment, contacts mixing with the sulfur-containing smoke gas that enters chemical reaction equipment from smoke air inlet.Oxidation solution is containing Fe
3+chemical solution, after contacting with sulfur-containing smoke gas, by SO in flue gas
2be oxidized to SO
4 2-, realize the oxidation removal of sulfureous in flue gas.Slough SO
2the flue gas of composition is beyond chemical reaction equipment top flue gas exhaust pipe discharge system.Outside absorption liquid input unit is by absorption liquid self-absorption liquid inlet input chemical reaction equipment, and absorption liquid is containing Ca
2+chemical solution, Ca
2+with SO
4 2-chemical combination generates CaSO
4be deposited to chemical reaction equipment bottom.Oxidation solution is by containing Fe
3+chemical solution be reduced into containing Fe
2+chemical solution, also drop to chemical reaction equipment bottom.In chemical reaction equipment, chemical oxidation reaction enters equipment for separating liquid from solid with the chemical liquid of fixing after finishing through discharging tube, and after Separation of Solid and Liquid, liquid component is mainly containing Fe
2+reducing solution.Reducing solution enters bioreactor through separator discharging tube, pipeline, feeding device.Bioreactor provides iron-oxidizing bacteria (Fe (II)-oxidizing microorganisms, FeOM) biologically active environment, utilizes microorganism by the Fe in reducing solution
2+be oxidized to Fe
3+make reducing solution regeneration become oxidation solution.Oxidation solution enters chemical reaction equipment through discharging tube, pipeline, oxidation solution feeding device, again performance oxidation SO
2for SO
4 2-effect, realize thus the circular flow of system.
The technique core of this circulatory system based on microbe-catalytic oxidization, by oxidisability Fe
3+recycle, realize SO in flue gas
2efficiently remove.
In the above-mentioned circulatory system, while operation for assurance system the operation of gas, liquid unimpeded, reaction unit discharging tube, smoke air inlet opening are in chemical reaction equipment bottom, oxidation solution feeding device opening is at chemical reaction equipment top.More preferably, smoke air inlet opening is at chemical reaction equipment bottom end face, oxidation solution feeding device opening is at chemical reaction equipment top end face, and discharging tube opening is at chemical reaction equipment bottom end face, and flue gas exhaust pipe is connected to chemical reaction equipment top end face.
Further, chemical reaction equipment oxidation solution feeding device, bioreactor feeding device are spray equipments.
Further, bioreactor is membrane bioreactor, and biomembrane is fixed iron-oxidizing bacteria.Usually, iron-oxidizing bacteria is Thiobacillus ferrooxidans or the Mixed Microbes take Thiobacillus ferrooxidans as master, 25 ℃～30 ℃ of the inner constant temperature of bioreactor, dissolved oxygen 2mg/L～5mg/L.
In the above-mentioned circulatory system, in system, there is the iron content chemical solution being recycled through redox process.Iron content chemical solution can be the sulfate liquor of iron or the chlorate solution of iron etc.When system operation, under different state of the art, the chemical solution of iron content is respectively Fe
2(SO
4)
3with or FeSO
4, FeCl
3with or FeCl
2.
The above-mentioned flue gas biological desulphurization circulatory system can be expanded, and increases system front end pretreatment unit.Specifically: system also comprises flue gas buffering mechanism, described flue gas buffering mechanism is connected between chemical reaction equipment and flue gas intake line via pipeline.The effect of flue gas buffering mechanism is to make flue gas to form to stablize flow velocity to enter system, and not only protection system operated steadily, but also guarantees desulfurized effect, protection system simultaneously.
Further, system also comprises flue gas cooling device, and described flue gas cooling device is connected between flue gas buffering mechanism and chemical reaction equipment via pipeline.Flue gas cooling device adopts coil pipe cooling structure, selectively unlocking operation in the time that flue-gas temperature is too high.Further, set temperature sensing device in flue gas cooling device, according to preset temperature high-low limits unlatching or out of service.
Further, system also comprises circulation regulating reservoir, and described circulation regulating reservoir is connected between bioreactor and chemical reaction equipment via pipeline.The major function of circulation regulating reservoir is buffering and the current of stablizing the oxidation solution that enters chemical reaction equipment.
The flue gas biological desulphurization circulatory system that the utility model provides, enters the flue gas SO of system
2content should be 500mg/m
3～1000mg/m
3.
Compared with prior art, the beneficial effects of the utility model are: (1) system architecture is simple compact, it is easy to install and use, can circular flow, realize the biological desulphurization of sulfur-containing smoke gas; (2) system desulfurization condition gentleness, simple to operate, operation stability is strong, reaction is easy to control and the advantage such as non-secondary pollution; (3) Fe
3+oxidation life long, operation energy consumption is little, cost is low, can meet large-scale production requirement; (4) system also can make microbe-catalytic oxidization and chemical oxidation absorption under best separately environment, carry out respectively, to improve system desulfuration efficiency.
Accompanying drawing explanation
Fig. 1 is embodiment mono-flue gas biological desulphurization circulating system structure schematic diagram.
Fig. 2 is embodiment bis-flue gas biological desulphurization circulating system structure schematic diagrames.
Figure notation in accompanying drawing is respectively:
1 chemical reaction equipment 11 reaction unit discharging tube 12 smoke air inlet 13 absorption liquid inlet 14 oxidation solution feeding device 2 equipment for separating liquid from solid 3 bioreactor 31 feeding device 4 flue gas exhaust pipe 5 flue gas intake line 6 flue gas buffering mechanism 7 flue gas cooling device 8 circulation regulating reservoirs
The specific embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is further described.
Embodiment mono-
As shown in Figure 1, process a kind of flue gas biological desulphurization circulatory system.
Fig. 1 is flue gas biological desulphurization circulating system structure schematic diagram.The flue gas biological desulphurization circulatory system comprises the chemical reaction equipment 1, equipment for separating liquid from solid 2, the bioreactor 3 that connect by pipeline.The reaction unit discharging tube 11 of chemical reaction equipment 1 is connected to equipment for separating liquid from solid 2 inlets by the road, chemical reaction equipment 1 has smoke air inlet 12 and connects flue gas intake line 5, have absorption liquid inlet 13 and connect absorption liquid input unit, top has opening to connect flue gas exhaust pipe 4.Equipment for separating liquid from solid 2 discharging tubes are connected to bioreactor 3 feeding devices 31 by the road.Bioreactor 3 discharging tubes are connected to the oxidation solution feeding device 14 of chemical reaction equipment 1 by the road.
Reaction unit discharging tube 11, smoke air inlet 12 openings are in chemical reaction equipment 1 bottom, and oxidation solution feeding device 14 openings are at chemical reaction equipment 1 top.Chemical reaction equipment 1 oxidation solution feeding device 14, bioreactor 3 feeding devices 31 are spray equipments.
In system, there is the iron content chemical solution being recycled through redox process.
In system pipeline, be connected with necessary pump and/or valve.
In the present embodiment, iron-oxidizing bacteria is selected Thiobacillus ferrooxidans, 25 ℃～30 ℃ of the inner constant temperature of bioreactor 3, dissolved oxygen 2mg/L～5mg/L; Iron content chemical solution is specifically selected the sulfate liquor of iron, and oxidation solution and reducing solution are respectively with Fe
2(SO
4)
3be main with FeSO
4it is main chemical solution; Absorption liquid is specifically selected Ca (OH)
2.
Embodiment bis-
As shown in Figure 2, process a kind of flue gas biological desulphurization circulatory system.
Fig. 2 is flue gas biological desulphurization circulating system structure schematic diagram.The flue gas biological desulphurization circulatory system and embodiment mono-same section no longer repeat, and its difference is:
System also comprises flue gas buffering mechanism 6, and flue gas buffering mechanism 6 is connected between chemical reaction equipment 1 and flue gas intake line 5 via pipeline.
Also comprise flue gas cooling device 7, flue gas cooling device 7 is connected between flue gas buffering mechanism 6 and chemical reaction equipment 1 via pipeline.
Also comprise circulation regulating reservoir 8, circulation regulating reservoir 8 is connected between bioreactor 3 and chemical reaction equipment 1 via pipeline.
In system pipeline, be connected with necessary pump and/or valve.
In the present embodiment, iron-oxidizing bacteria is selected take Thiobacillus ferrooxidans as main Mixed Microbes, 25 ℃～30 ℃ of the inner constant temperature of bioreactor 3, dissolved oxygen 2mg/L～5mg/L; Iron content chemical solution is specifically selected the chlorate solution of iron, and oxidation solution and reducing solution are respectively with FeCl
3be main with FeCl
2it is main chemical solution.
This flue gas biological desulphurization circulatory system, after open system power supply, containing SO
2flue gas, by air inlet pipeline, enters flue gas buffering mechanism 6, and under its effect, flue gas is cushioned, balance, enters subsequently flue gas cooling device 7, if desired its cooling is processed; Stable and cooling flue gas, under the effect of aspiration pump, enters chemical reaction equipment 1, in this device, and the Fe in oxidation solution
3+sO in oxidation flue gas
2for SO
4 2-, containing Ca (OH)
2absorption liquid pumps into chemical reaction equipment 1 in good time, by SO
4 2-with CaSO
4form, by fixing sulphur precipitation, realizes the oxidation removal of sulfureous in flue gas, and the flue gas after desulfurization leaves whole system from flue gas exhaust pipe 4; In chemical reaction equipment 1, solidliquid mixture enters equipment for separating liquid from solid 2, CaSO in solidliquid mixture
4separated completely, liquid part is containing Fe
2+reducing solution; Reducing solution enters bioreactor 3 under suction pump effect; In bioreactor 3, the Fe in reducing solution
2+under the catalytic oxidation of iron-oxidizing bacteria, become Fe
3+, reducing solution is also regenerated becomes oxidation solution; Oxidation solution enters circulation regulating reservoir 8, and liquid stream is stablized, and re-enters chemical reaction equipment 1 finally by suction pump, continues to carry out desulfurization processing to entering system flue gas.Total system, by continuous circulation process, can be realized high-efficiency flue gas desulfurization and Fe
3+recycle texts.
Claims (7)
1. a flue gas biological desulphurization circulatory system, is characterized in that: comprise the chemical reaction equipment (1), equipment for separating liquid from solid (2), the bioreactor (3) that connect by pipeline;
The reaction unit discharging tube (11) of described chemical reaction equipment (1) is connected to equipment for separating liquid from solid (2) inlet by the road, chemical reaction equipment (1) has smoke air inlet (12) and connects flue gas intake line (5), have absorption liquid inlet (13) and connect absorption liquid input unit, top has opening to connect flue gas exhaust pipe (4);
Described equipment for separating liquid from solid (2) discharging tube is connected to bioreactor (3) feeding device (31) by the road;
The reactor discharging tube (32) of described bioreactor (3) is connected to the oxidation solution feeding device (14) of chemical reaction equipment (1) by the road.
2. the circulatory system according to claim 1, it is characterized in that: described reaction unit discharging tube (11), smoke air inlet (12) opening are in chemical reaction equipment (1) bottom, and oxidation solution feeding device (14) opening is at chemical reaction equipment (1) top; Described chemical reaction equipment (1) oxidation solution feeding device (14), bioreactor (3) feeding device (31) are spray equipments.
3. the circulatory system according to claim 1, is characterized in that: described bioreactor (3) is membrane bioreactor, and biomembrane is fixed iron-oxidizing bacteria.
4. according to the arbitrary described circulatory system of claim 1～3, it is characterized in that: in system, have the iron content chemical solution, the sulfate liquor that described iron content chemical solution is iron or the chlorate solution of iron that are recycled through redox process.
5. the circulatory system according to claim 4, is characterized in that: also comprise flue gas buffering mechanism (6), described flue gas buffering mechanism (6) is connected between chemical reaction equipment (1) and flue gas intake line (5) via pipeline.
6. the circulatory system according to claim 5, is characterized in that: also comprise flue gas cooling device (7), described flue gas cooling device (7) is connected between flue gas buffering mechanism (6) and chemical reaction equipment (1) via pipeline.
7. the circulatory system according to claim 6, is characterized in that: also comprise circulation regulating reservoir (8), described circulation regulating reservoir (8) is connected between bioreactor (3) and chemical reaction equipment (1) via pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320504920.8U CN203610025U (en) | 2013-08-18 | 2013-08-18 | Biodesulfurization circulating system of flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320504920.8U CN203610025U (en) | 2013-08-18 | 2013-08-18 | Biodesulfurization circulating system of flue gas |
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| Publication Number | Publication Date |
|---|---|
| CN203610025U true CN203610025U (en) | 2014-05-28 |
Family
ID=50762706
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320504920.8U Expired - Fee Related CN203610025U (en) | 2013-08-18 | 2013-08-18 | Biodesulfurization circulating system of flue gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114181749A (en) * | 2021-12-27 | 2022-03-15 | 华夏碧水环保科技有限公司 | Two-section type biogas biological desulfurization device |
-
2013
- 2013-08-18 CN CN201320504920.8U patent/CN203610025U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114181749A (en) * | 2021-12-27 | 2022-03-15 | 华夏碧水环保科技有限公司 | Two-section type biogas biological desulfurization device |
| CN114181749B (en) * | 2021-12-27 | 2022-09-20 | 华夏碧水环保科技股份有限公司 | Two-section type biogas biological desulfurization device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20160818 |