CN105289204A - System and method using powdery active cock for processing low concentration sulfur dioxide flue gas - Google Patents
System and method using powdery active cock for processing low concentration sulfur dioxide flue gas Download PDFInfo
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- CN105289204A CN105289204A CN201510816452.1A CN201510816452A CN105289204A CN 105289204 A CN105289204 A CN 105289204A CN 201510816452 A CN201510816452 A CN 201510816452A CN 105289204 A CN105289204 A CN 105289204A
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- flue gas
- regenerator
- feed bin
- jiao
- desulfurizing tower
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- 239000003546 flue gas Substances 0.000 title claims abstract description 58
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 57
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000000571 coke Substances 0.000 claims abstract description 61
- 239000007921 spray Substances 0.000 claims abstract description 37
- 239000007789 gas Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 15
- 230000003009 desulfurizing effect Effects 0.000 claims description 48
- 239000000843 powder Substances 0.000 claims description 46
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 35
- 235000010269 sulphur dioxide Nutrition 0.000 claims description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 230000008676 import Effects 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- 239000004291 sulphur dioxide Substances 0.000 claims description 15
- 238000010521 absorption reaction Methods 0.000 claims description 14
- 229920006395 saturated elastomer Polymers 0.000 claims description 14
- 238000003723 Smelting Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 6
- 238000005243 fluidization Methods 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 230000026676 system process Effects 0.000 claims description 2
- 238000006477 desulfuration reaction Methods 0.000 abstract description 12
- 230000023556 desulfurization Effects 0.000 abstract description 11
- 230000008929 regeneration Effects 0.000 abstract description 6
- 238000011069 regeneration method Methods 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 5
- 238000005406 washing Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 238000001179 sorption measurement Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Abstract
The present invention relates to a system and method using powdery active cock for processing low concentration sulfur dioxide flue gas, the system includes a spray washing tower, a gas outlet of the spray washing tower is connected with an inlet of a desulfurization tower, a top arranged bin with powdery active cock stored in is arranged above the desulfurization tower, the top arranged bin is provided with a first injection gun for injection of the powdery active cock stored in the top arranged bin with into the desulfurization tower, the desulfurization tower is communicated with a bag-type dust remover, an outlet of the bag-type dust remover is communicated with a first warehouse-style pump, the first warehouse-style pump is communicated with a regeneration tower top arranged bin, the regeneration tower top arranged bin is communicated with an inlet of a regeneration tower, an outlet of the regeneration tower is communicated with a second warehouse-style pump, and the second warehouse-style pump is communicated with a pipeline of the top arranged bin with powdery active cock stored in. The system improves desulfurization efficiency, meanwhile reduces the cost of processing of activated coke particles, and by use of closed pneumatic conveying in the material conveying process, the number of field devices is reduced, operation is stable, and the work efficiency is improved.
Description
Technical field
The invention belongs to chemical field, relate to the treating apparatus of sulfur dioxide flue gas, be specifically related to a kind of system of powder activated Jiao's process low concentration sulphur dioxide flue gas.
Background technology
In active coke desulphurizing industry, granulated activated Jiaozhuo that specification is φ 8mm × 12mm is used to be that desulfurizing agent carries out desulfurization, granular activated coke is in absorption and resolving, because the activated coke powder after mechanical wear cannot use, and activated coke consumption is large, causes desulfurization operation cost high.
Current domestic activated coke industry all adopts granulated activated Jiaozhuo to be desulfurizing agent, there is the weak points such as absorption is incomplete, poor fluidity, parsing energy consumption are high, activated coke consumption is large, be mainly manifested in following several respects in running:
In traditional sulfur removal technology, activated coke particle flows by gravity from top to bottom in desulfurizing tower, sulfur dioxide flue gas vertical direction is through activated coke particle layers, in the activated coke of meeting gas face is to flue gas, adsorptivity is better, but due to activated coke thickness of bed layer, the activated coke of middle part can not get good adsorption effect, does not adsorb completely saturatedly just to enter regenerative system, causes desulfuration efficiency to decline.
In traditional activated burnt desulfurizing tower, activated coke is by flow by gravity, and flowing velocity is limited, but due to flowing velocity excessively slow, cause and originally become fixed bed for mobile bed, when tackling entrance concentration and being too high, can adsorb supersaturation due to the inner activated coke of bed, cause tail gas to exceed standard.
Heat exchange mode is taked to heat activated coke in traditional activated burnt desulfurization resolving, first with inert gas, regenerator internal heat exchange tubes is heated during parsing, activated coke particle is transferred heat to by the heat transfer effect of heat exchanger tube, but because between solid, rate of heat transfer is slow, and heat transfer efficiency is uneven, can not complete efficient parsing at short notice, and the heat time is slow, causes energy consumption high.
In traditional activated burnt treatment process, due to mechanical wear, the consumption of activated coke can be caused, the activated coke powder that wearing and tearing produce can not use again, usual way is produced for being sent to upstream smelting system nearby as fuel, along with inlet flue gas concentration raises and the quickening of activated coke circulation rate, activated coke consumption can be caused to increase, increase operating cost.
In sweetening process, employ the plant equipment such as a large amount of apron conveyors, bucket elevator, cause device flow process in running complicated, the problems such as equipment is various, and fault rate is high, and maintenance is large.
Because the activated coke amount consumed is large, need regular to carry out supplementary activated coke, in transport and reinforced process, use the equipment such as elevator, carry out lifting reinforced, operation easier is large.
Summary of the invention
The present invention seeks to for above shortcomings in prior art, provide that a kind of technological process is short, absorption property is high, resolve that energy consumption is low, the simple desulphurization system of Operation and Maintenance.
The present invention is achieved through the following technical solutions: a kind of system of powder activated Jiao's process low concentration sulphur dioxide flue gas, comprise spray scrubber, the gas outlet of spray scrubber and the import of desulfurizing tower are connected, the top of desulfurizing tower is provided with the overhead feed bin storing powder activated Jiao, overhead feed bin is provided with the powder activated burnt high velocity jet in it to the first spray gun in desulfurizing tower, the gas outlet of desulfurizing tower communicates with sack cleaner import, outlet and first cone pump of sack cleaner bottom are connected, first cone pump and regenerator overhead feed bin are connected, the bottom of regenerator overhead feed bin connects with the import of regenerator, outlet and second cone pump of regenerator are connected, second cone pump is communicated by pipeline with the overhead feed bin storing powder activated Jiao.
Further, regenerator is shell and tube regenerator, and regenerator overhead feed bin is provided with the second spray gun be injected into by the material high-speed in it in regenerator.
Further, the second spray gun import is connected by tube connector with regenerator overhead feed bin bottom, and this tube connector is provided with nitrogen gas control valve, and the second lance outlet passes to the top in regenerator.
Further, the import of the first spray gun is connected by the first pipeline with the bottom of the overhead feed bin storing powder activated Jiao, and be provided with nitrogen valve in the first pipeline, the spout of spray gun passes to the top in desulfurizing tower.
Further, outlet and first cone pump of sack cleaner bottom are connected by the second pipeline, and the hypomere of the second pipeline is provided with automatic feed valve.
Further, the outlet of desulfurizing tower bottom communicates with the stage casing of the second pipeline.
Further, the first cone pump and regenerator overhead feed bin are connected by the 3rd pipeline, and the top of the 3rd pipeline is provided with outlet valve, and end is provided with automatic feed valve.
Further, the import of the second cone pump is provided with automatic feed valve, and the outlet of the second cone pump is provided with outlet valve.
Further, the gas outlet on sack cleaner top is provided with the blower fan for being arranged by purified gas outward.
Adopt a method for said system process low concentration sulphur dioxide flue gas, specifically comprise the following steps:
A. first flue gas during smelting enters spray scrubber, cooling dedusting is carried out to flue gas, flue gas after cooling dedusting enters desulfurizing tower, powder activated Jiao is stored temporarily in overhead feed bin, open the nitrogen valve door installed in the first pipeline by 0.4Mpa ~ 0.6Mpa nitrogen by powder activated Jiao by top first spray gun high velocity jet, suspension fluidization state is formed in desulfurizing tower, now flue gas during smelting passes perpendicularly through the bed of fluidized state, flue gas fully contacts with activated coke powder, complete sweetening process, major part activated coke enters follow-up sack cleaner with flue gas, discharged by blower fan after purification,
B. a small amount of activated coke is due to bottom gravitational settling to desulfurizing tower, and in desulfurizing tower, the saturated activated coke powder of absorption together enters the first cone pump, is delivered to regenerator overhead feed bin by adsorbing saturated activated coke in the first cone pump;
C. the activated coke that in regenerator overhead feed bin, absorption is saturated is by resolving in the second spray gun high velocity jet to regenerator, the second cone pump is fallen into after being parsed, activated coke in second cone pump is delivered to desulfurizing tower overhead feed bin, recycling of activated coke, this completes powder activated Jiao from the cyclic process being adsorbed onto parsing.
the invention has the beneficial effects as follows:the present invention relates to the process of powder activated burnt desulfurization absorption and regeneration parsing.Utilize powder activated Jiao's process low concentration SO
2the technology of flue gas, it is high that the granulated activated coke ratio adopted with current activated coke industry comparatively has absorption property, the advantages such as easy and simple to handle, flow process is short, the facilities such as the corresponding flue gas pretreatment of this complete sets of Techniques simultaneously, mass transport and trapping, suspension fluidization adsorption tower, shell and tube regenerator.Specific as follows:
1. flue gas pretreatment: flue gas during smelting has the advantages that temperature is high and Dust Capacity is large, for avoiding and powder activated burnt desulphurizer mixing, therefore pretreatment is carried out to entering desulphurization system flue gas, adopt spray scrubber to carry out cooling dedusting to flue gas during smelting, washing flue-gas temperature is controlled below 120 DEG C.
2. material trapping circulation conveying: material trapping cyclic delivery system is made up of capital equipments such as taper feed bin, cone pump, sack cleaners, effectively decreases the conveying equipment of material in transportation, and the conveying of pulverous activated coke has more advantage.Adsorb saturated activated coke powder efficiently to be trapped by rear end sack cleaner, fall in cone pump, by pneumatic conveying mode, powder activated Jiao is delivered to conical material storehouse, regenerator top, regenerative system carries out adding Thermal desorption, activated coke after parsing falls into cone pump bottom regenerator, return desulfurizing tower top tapered feed bin by pneumatic conveying mode, realize powder activated burnt cycling and reutilization.
3. suspension fluidization absorption: pulverous activated coke is the N of 0.4Mpa ~ 0.6Mpa by adsorption tower top by pressure
2activated coke is sprayed by spray gun, in activated coke room, form fluidized suspension state, sulfur dioxide flue gas passes perpendicularly through the active focus layer of fluidized state, is controlled by adsorption temp between 80 DEG C ~ 120 DEG C, flue gas is directly contacted with sulfided state activated coke powder, thus realizes flue gas high-efficiency desulfurization.Part activated coke powder is by cone bucket bottom gravitational settling to desulfurizing tower, and by gravity current to cone pump, other activated coke powder enter rear end sack cleaner with air-flow, collect activated coke powder, and the tail gas after desulfurization is discharged by tail gas funnel.
4. shell and tube regeneration Analytic Tower: adopt tubular heat exchanger form, regenerator tower adopts mode of heating to resolve, and heat exchange nitrogen is at shell fluid flow, and powder activated Jiao is flowed in vertical tube side, when powder activated Jiao is through more than 300 DEG C high temperature section, the SO of 10% ~ 20%
2flue gas is resolved in activated coke space, bringing-up section in the middle part of regenerator is formed tiny structure, is extracted out by the gas parsed, thus make powder activated Jiao have again adsorption activity Jiao from middle part.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Detailed description of the invention
A kind of system of powder activated Jiao's process low concentration sulphur dioxide flue gas, comprise spray scrubber, the gas outlet of spray scrubber 1 and the import of desulfurizing tower 2 are connected, the top of desulfurizing tower 2 is provided with the overhead feed bin 6 storing powder activated Jiao, the bottom storing the overhead feed bin 6 of powder activated Jiao is connected by the import of the first pipeline with spray gun 10, the spout of spray gun 10 passes to the top in desulfurizing tower 2, nitrogen valve 12 is installed in first pipeline, by the first spray gun 10 by the powder activated burnt high velocity jet in overhead feed bin 6 in desulfurizing tower 2, the gas outlet of desulfurizing tower 2 communicates with sack cleaner 4 import, the gas outlet on sack cleaner 4 top is provided with the blower fan 5 for being arranged by purified gas outward, outlet and first cone pump 8 of sack cleaner 4 bottom are connected by the second pipeline, the outlet of desulfurizing tower 2 bottom communicates with the stage casing of the second pipeline, the lower end of the second pipeline is provided with automatic feed valve 14.First cone pump 8 is connected with regenerator overhead feed bin 7, regenerator overhead feed bin 7 bottom is connected with the second spray gun 11 import by tube connector, this tube connector is provided with nitrogen gas control valve 13, second spray gun 11 exports the top passed in regenerator 3 and is injected in regenerator 3 by the second spray gun 11 by the material high-speed in regenerator overhead feed bin 7, outlet and second cone pump 9 of regenerator 3 are connected, and the second cone pump 9 is communicated by pipeline with the overhead feed bin 6 storing powder activated Jiao.First cone pump 8 is connected by the 3rd pipeline with regenerator overhead feed bin 7, and the top of the 3rd pipeline is provided with outlet valve 15, and end is provided with automatic feed valve 16.The outlet that the import of the second cone pump 9 is provided with automatic feed valve 17, second cone pump 9 is provided with outlet valve 18.
First flue gas during smelting enters spray scrubber 1, carries out cooling dedusting to flue gas.Qualified flue gas enters desulfurizing tower 2, powder activated Jiao is stored temporarily in overhead feed bin 6, open nitrogen valve 12, by 0.4Mpa ~ 0.6Mpa nitrogen by powder activated Jiao by top lance 10 high velocity jet, in desulfurizing tower, form suspension fluidization state, now flue gas during smelting passes perpendicularly through the bed of fluidized state, flue gas fully contacts with activated coke powder, complete sweetening process, most of activated coke enters follow-up sack cleaner 4 with flue gas, is discharged after purification by blower fan 5.A small amount of activated coke is due to bottom gravitational settling to desulfurizing tower 2, adsorb saturated activated coke powder and together enter cone pump 8, control the first cone pump material level by automatic feed valve 14, open outlet valve 15 and the saturated activated coke of absorption in first cone pump 8 is delivered to regenerator overhead feed bin 7.The activated coke that in regenerator overhead feed bin 7, absorption is saturated passes through the second spray gun 11 high velocity jet in regenerator 3, adsorb saturated activated coke to enter regenerator 3 and resolve, the second cone pump 9 is fallen into after being parsed, control the second cone pump material level by automatic feed valve 17, open outlet valve 18 and activated coke in second cone pump is delivered to desulfurizing tower overhead feed bin 6.This completes powder activated Jiao from the cyclic process being adsorbed onto parsing.
embodiment 1
During normal production, (sulfur dioxide concentration is 2000mg/Nm to flue gas during smelting
3, tolerance is 110000Nm
3/ h, temperature 200 DEG C, dustiness 80mg/Nm
3) first enter spray scrubber 1, cooling dedusting is carried out to flue gas.Qualified flue gas (temperature 130 DEG C, dustiness 30mg/Nm
3) enter desulfurizing tower 2, powder activated Jiao is stored temporarily in overhead feed bin 6, open nitrogen valve 12, by nitrogen by powder activated Jiao by top lance 10 high velocity jet, flue gas fully contacts with activated coke powder, and temperature in desulfurizing tower is controlled, at 80 DEG C-120 DEG C, to complete sweetening process, major part activated coke enters follow-up sack cleaner 4 with flue gas, is discharged after purification by blower fan 5.A small amount of activated coke is due to bottom gravitational settling value desulfurizing tower, adsorb saturated activated coke powder and together enter the first cone pump 8, control cone pump material level by automatic feed valve 14, open outlet valve 15 and activated coke in first cone pump 8 is delivered to regenerator overhead feed bin 7.
Adsorb saturated activated coke to enter regenerator 3 and be heated to 300 DEG C and resolve, bottom being parsed laggard regenerator excessively, low-temperature zone is lowered the temperature, be down to after below 130 DEG C until temperature and fall into the second cone pump 9, control the second cone pump material level by automatic feed valve 17, open outlet valve 18 and activated coke in cone pump is delivered to desulfurizing tower overhead feed bin 6.
embodiment 2
When system is driven, after first confirming that nitrogen pipeline pressure is normal, confirm desulfurizing tower overhead feed bin 6, regenerator overhead feed bin 7 material level, rear unlatching dust collecting system, normally open blower fan 5, open bagroom 4, open nitrogen valve 12, nitrogen valve 13.Normal unlatching activated coke dust circulation system, enter desulfurizing tower in by powder activated Jiao by top lance 10 high velocity jet by nitrogen, most of activated coke enters follow-up sack cleaner 4, is discharged after purification by blower fan 5.A small amount of activated coke is due to bottom gravitational settling to desulfurizing tower, and activated coke powder enters the first cone pump 8, controls the first cone pump material level by automatic feed valve 14, opens outlet valve 15 and activated coke in first cone pump is delivered to regenerator overhead feed bin 7.Activated coke falls into the second cone pump 9 after entering regenerator, control the second cone pump material level by automatic feed valve 17, opens outlet valve 18 and activated coke in second cone pump is delivered to desulfurizing tower overhead feed bin 6.After confirming that Matter Transfer is normal, open spray scrubber 1, open flue gas and enter desulfurizing tower valve, ash-laden gas directly contacts with activated coke powder, completes sweetening process, and flue gas is purified.After activated coke absorption is saturated, open regenerative system to resolve activated coke, powder activity Jiao in regenerator bringing-up section is heated to more than 300 DEG C by opening electric heater, parse concentration be 10% ~ 15% sulfur dioxide flue gas be sent to chemical industry acid making system, the activated coke be parsed to desulfurizing tower top feed bin, realizes recycling of activated coke by Geldart-D particle.
Claims (10)
1. the system of powder activated Jiao's process low concentration sulphur dioxide flue gas, comprise spray scrubber (1), it is characterized in that: the gas outlet of spray scrubber (1) and the import of desulfurizing tower (2) are connected, the top of desulfurizing tower (2) is provided with the overhead feed bin (6) storing powder activated Jiao, overhead feed bin (6) is provided with the powder activated burnt high velocity jet in it to the first spray gun (10) in desulfurizing tower (2), the gas outlet of desulfurizing tower (2) communicates with sack cleaner (4) import, outlet and first cone pump (8) of sack cleaner (4) bottom are connected, first cone pump (8) and regenerator overhead feed bin (7) are connected, the bottom of regenerator overhead feed bin (7) connects with the import of regenerator (3), outlet and second cone pump (9) of regenerator (3) are connected, second cone pump is communicated by pipeline with the overhead feed bin storing powder activated Jiao.
2. the system of a kind of powder activated Jiao's process low concentration sulphur dioxide flue gas as claimed in claim 1, it is characterized in that: regenerator is shell and tube regenerator, regenerator overhead feed bin (7) is provided with the second spray gun (11) be injected into by the material high-speed in it in regenerator (3).
3. the system of a kind of powder activated Jiao's process low concentration sulphur dioxide flue gas as claimed in claim 2, it is characterized in that: the second spray gun (11) import is connected by tube connector with regenerator overhead feed bin (7) bottom, this tube connector is provided with nitrogen gas control valve (13), and the second spray gun (11) exports the top passed in regenerator (3).
4. the system of a kind of powder activated Jiao's process low concentration sulphur dioxide flue gas as described in any one of claim 1-3, it is characterized in that: the import of the first spray gun (10) is connected by the first pipeline with the bottom of the overhead feed bin (6) storing powder activated Jiao, be provided with nitrogen valve (12) in first pipeline, the spout of spray gun (10) passes to the top in desulfurizing tower (2).
5. the system of a kind of powder activated Jiao's process low concentration sulphur dioxide flue gas as claimed in claim 4, it is characterized in that: outlet and first cone pump (8) of sack cleaner (4) bottom are connected by the second pipeline, and the hypomere of the second pipeline is provided with automatic feed valve (14).
6. the system of a kind of powder activated Jiao's process low concentration sulphur dioxide flue gas as claimed in claim 5, is characterized in that: the outlet of desulfurizing tower (2) bottom communicates with the stage casing of the second pipeline.
7. the system of a kind of powder activated Jiao's process low concentration sulphur dioxide flue gas as described in claim 5 or 6, it is characterized in that: the first cone pump (8) and regenerator overhead feed bin (7) are connected by the 3rd pipeline, the top of the 3rd pipeline is provided with outlet valve (15), and end is provided with automatic feed valve (16).
8. the system of a kind of powder activated Jiao's process low concentration sulphur dioxide flue gas as claimed in claim 7, it is characterized in that: the import of the second cone pump (9) is provided with automatic feed valve (17), the outlet of the second cone pump (9) is provided with outlet valve (18).
9. the system of a kind of powder activated Jiao's process low concentration sulphur dioxide flue gas as claimed in claim 8, is characterized in that: the gas outlet on sack cleaner (4) top is provided with the blower fan (5) for being arranged by purified gas outward.
10. adopt a method for system process low concentration sulphur dioxide flue gas as claimed in claim 1, it is characterized in that: specifically comprise the following steps:
A. first flue gas during smelting enters spray scrubber (1), cooling dedusting is carried out to flue gas, flue gas after cooling dedusting enters desulfurizing tower (2), powder activated Jiao is stored temporarily in overhead feed bin (6), open the nitrogen valve (12) installed in the first pipeline by 0.4Mpa ~ 0.6Mpa nitrogen by powder activated Jiao by top first spray gun (10) high velocity jet, suspension fluidization state is formed in desulfurizing tower (2), now flue gas during smelting passes perpendicularly through the bed of fluidized state, flue gas fully contacts with activated coke powder, complete sweetening process, major part activated coke enters follow-up sack cleaner (4) with flue gas, discharged by blower fan (5) after purification,
B. a small amount of activated coke is because gravitational settling is to desulfurizing tower (2) bottom, in desulfurizing tower (2), the saturated activated coke powder of absorption together enters the first cone pump (8), and the saturated activated coke of absorption in the first cone pump (8) is delivered to regenerator overhead feed bin (7);
C. the activated coke that in regenerator overhead feed bin (7), absorption is saturated is resolved to regenerator (3) by the second spray gun (11) high velocity jet, the second cone pump (9) is fallen into after being parsed, activated coke in second cone pump is delivered to desulfurizing tower overhead feed bin, recycling of activated coke, this completes powder activated Jiao from the cyclic process being adsorbed onto parsing.
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