CN203615326U - Limestone desulphurization system inside circulating fluidized bed boiler based on flow state reconstruction - Google Patents
Limestone desulphurization system inside circulating fluidized bed boiler based on flow state reconstruction Download PDFInfo
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- CN203615326U CN203615326U CN201320833099.4U CN201320833099U CN203615326U CN 203615326 U CN203615326 U CN 203615326U CN 201320833099 U CN201320833099 U CN 201320833099U CN 203615326 U CN203615326 U CN 203615326U
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- Prior art keywords
- pipeline
- warehouse
- separator
- desulphurization system
- burner hearth
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 235000019738 Limestone Nutrition 0.000 title abstract description 8
- 239000006028 limestone Substances 0.000 title abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000006477 desulfuration reaction Methods 0.000 claims description 15
- 230000003139 buffering effect Effects 0.000 claims description 13
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 13
- 239000011819 refractory material Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 8
- 239000011449 brick Substances 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 6
- 230000023556 desulfurization Effects 0.000 claims description 5
- 239000012716 precipitator Substances 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003546 flue gas Substances 0.000 abstract description 7
- 239000000428 dust Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
A limestone desulphurization system inside a circulating fluidized bed boiler based on flow state reconstruction comprises a hearth, a conveying mechanism, a storage bunker mechanism and pipelines, wherein the conveying mechanism comprises a caching bin, a mixer and a blower, and a caching feed opening and an exhaust opening are formed in the upper part of the caching bin; the storage bunker mechanism comprises a storage bunker, a dust collector at the top of a warehouse, another pipeline, an electric heater and another blower; the limestone desulphurization system further comprises a wind separator communicated with the flue gas outlet of the hearth, a return feeder, a wind box arranged at the bottom of the hearth and introduced into the hearth from a primary wind duct, secondary wind ducts distributed on the front wall and the rear wall of the hearth, an in-boiler limestone desulphurization inlet valve set communicated with the secondary wind ducts, a tail part flue arranged at the top of the separator, and a return material leg integrated with the separator; the inlet valve set is connected with the mixer through the pipeline; the return feeder is connected to the bottom of the return material leg. The limestone desulphurization system has the advantages of simple structure, high separating efficiency and the like, and is conducive to emission.
Description
Technical field
The utility model relates to Circulating Fluidized Bed Boiler Equipment and stove sodalime stone desulphurization system, specifically a kind of desulfuration in furnace technology of the CFBB based on fluidised form reconstruct.
Background technology
Along with country's " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) issues and implements, require flue dust, sulfur dioxide, nitrogen oxide, the mercury and mercuric compounds discharge of coal-burning boiler all will reach limit value.On to the control of sulfur dioxide, the CFBB having put into operation at present, more employing desulfuration in furnace system, but the problem that ubiquity desulfuration in furnace efficiency is low, sorbent utilization is low, lime stone consumption is large.Because desulfuration in furnace reaction is closely related with boiler design parameter and running status, and the separative efficiency that CFBB based on fluidised form reconstruct has is high, gas-solid mixing is abundant, fire box temperature is reasonable, the uniform distinct advantages of fire box temperature, for desulfuration in furnace reaction provides an excellent reaction condition, combine with desulfuration in furnace system, in the time of Ca/S=2, can reach more than 90% desulfuration efficiency, the coal that sulfur content in coal amount is less than to 1%, can realize environment protection standard discharge by this technology, the investment of saving system greatly and construction cost, there is good marketing prospect.There is no at present the design for the desulfuration in furnace system based on fluidised form reconstruction cycle fluidized-bed combustion boiler.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of prior art, solves the ubiquitous technical problem of current conventional products, and a kind of circulating fluid bed boiler sodalime stone desulphurization system based on fluidised form reconstruct is provided.
The technical scheme that the utility model adopts is: a kind of circulating fluid bed boiler sodalime stone desulphurization system based on fluidised form reconstruct, comprise burner hearth (1), conveying mechanism (7), warehouse mechanism (8), pipeline (15), described conveying mechanism (7) comprises buffering chamber (14), is arranged on the blender (13) of buffering chamber bottom, and by the blower fan (9) that pipeline (15) is connected with blender (13), be also provided with buffer memory charging aperture (16) and exhaust outlet (17) on described buffering chamber top, the electric heater (10) that described warehouse mechanism (8) comprises warehouse (11), is arranged on top, the storehouse dust-precipitator (12) at warehouse (11) top, is connected with warehouse (11) lower-left side by pipeline (15) and the blower fan (9) being connected with electric heater by pipeline, the exhaust outlet (17) that buffering chamber (14) top arranges is connected with the upper right side of warehouse (11) by pipeline (15), and buffer memory charging aperture (16) is connected with the lower end of warehouse (11) by pipeline, be characterized in: it also comprise be communicated with burner hearth (1) exhanst gas outlet be arranged in parallel at burner hearth exhanst gas outlet region, inlet flue duct has a down dip, the Adiabatic Cyclone separator (2) of central tube bias, material returning device (3), be arranged on the air compartment (4) of burner hearth (1) bottom from an air channel introducing burner hearth, be distributed in the secondary air channel (5) on burner hearth (1) front-back wall, the stove sodalime stone desulfurization inlet valve group (6) being communicated with secondary air channel (5), be arranged on the back-end ductwork (18) at separator top, the returning charge dipleg (19) being integrated with separator, described inlet valve group (6) is connected with blender (13) by pipeline (15), described material returning device (3) is connected with the bottom of returning charge dipleg.
Further preferred embodiment: described separator is made up of the refractory material back boxing of shell and three-decker, three layers of refractory material are respectively high-strength abrasion-proof castable, lightening casting material, light-weight insulating brick, and separator is provided with working temperature controller.
Further preferred embodiment: described material returning device (3) is made up of the refractory material back boxing of shell and three-decker, three layers of refractory material are respectively high-strength abrasion-proof castable, lightening casting material, light-weight insulating brick; The returning charge elegance high pressure cold wind of described material returning device, is sent into by little blast cap, the upper installing of the female pipe of entrance airduct flowmeter, pressure gauge, and described material returning device is provided with working temperature controller.
Further preferred embodiment: the nozzle of described secondary air channel (5) is arranged on lower furnace portion material needs combustion-supporting height.
The utility model compared with prior art, has the following advantages and beneficial effect:
Based on fluidised form reconstruct minimum discharge CFBB general structure design, guarantee the one-tenth ash wear characteristic of the boiler furnace flue gas rate of climb according to bunker coal, keep the best flue gas rate of climb of burner hearth within the scope of 4.5～5m/s, suitable circulated material quantity guarantees boiler operatiopn bed temperature, furnace outlet gas temperature, separator material air-teturning temperature and separator outlet temperature are all in 850～880 ℃ of optimal reaction temperature intervals, the high separating efficiency of cyclone separator makes recycle stock have best material specific surface area, extend the reaction time of desulfurizing agent in stove, strengthen the captured sulfur result of desulfurizing agent, make the sulfide (SO of the actual generation of boiler combustion after the desulfurization of stove sodalime stone
x) more international common product is greatly on the low side.Add boiler furnace front-back wall overfiren air port and spray into front burning in reducing atmosphere, strong spraying into of rigidity Secondary Air is that atmosphere transfers oxygen enrichment state to, and in stove, gas-solid mixing is good, the carrying out of having strengthened desulphurization reaction.The upper and lower temperature of burner hearth is even, and high-efficiency desulfurization reaction all can occur whole burner hearth up and down.By lime stone being become to grey abrasion test, determine that the best enters stove size grading simultaneously; Test and determine best desulfurizing agent kind by limestone activity, can greatly improve desulfuration efficiency.Desulfuration efficiency, in the time of Ca/S=2, can be guaranteed, up to more than 90%, to reach as high as 95%.The coal that is less than 1% for sulfur content, can not increase expensive afterbody desulfurizer, can reach discharge standard.The coal that is greater than 1% for sulfur content, semidry process desulfurizer after the stove of cooperation lower cost, synthesis desulfurating efficiency can be up to more than 99%, investment and operating cost are low, do not produce waste water and corrosion, can adapt to all coals, guarantee to reach boiler tail flue gas sulfide (SO in national GB13223-2011 " fossil-fuel power plant atmospheric pollutant emission standard "
x) discharge is less than 100mg/Nm
3requirement.The utility model is arranged in juxtaposition thermal insulation cyclone separator at furnace outlet, adopts inlet flue duct to have a down dip, the mode of central tube bias, and both simple in structure, separative efficiency is high again.
Flue gas after hearth combustion enters cyclone separator through furnace outlet, and the feed separation that flue gas is carried secretly is got off, and returns to burner hearth circulation fire by material returning device.Flue gas after separation flows to afterbody convection heating surface through central tube.Control the operating temperature in whole feed separation and returning charge loop for being conducive to super-low sulfur compound (SO
x) discharge optimum temperature.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Wherein, 1, burner hearth, 2, separator, 3, material returning device, 4, air compartment, 5, secondary air channel, 6, inlet valve group, 7, conveying mechanism, 8, warehouse mechanism, 9, blower fan, 10, electric heater, 11, warehouse, 12, top, storehouse dust-precipitator, 13, blender, 14, buffering chamber, 15, pipeline, 16, buffer memory charging aperture, 17, exhaust outlet, 18, back-end ductwork, 19, returning charge dipleg.
The specific embodiment
As shown in Figure 1, a kind of circulating fluid bed boiler sodalime stone desulphurization system based on fluidised form reconstruct, comprise burner hearth 1, conveying mechanism 7, warehouse mechanism 8, pipeline 15, described conveying mechanism 7 comprises buffering chamber 14, is arranged on the blender 13 of buffering chamber bottom, and the blower fan 9 being connected with blender 13 by pipeline 15, be also provided with buffer memory charging aperture 16 and exhaust outlet 17 on described buffering chamber top, the electric heater 10 that described warehouse mechanism 8 comprises warehouse 11, is arranged on top, the storehouse dust-precipitator 12 at warehouse 11 tops, is connected with warehouse 11 lower-left sides by pipeline 15 and the blower fan 9 being connected with electric heater by pipeline, the exhaust outlet 17 that buffering chamber 14 tops arrange is connected with the upper right side of warehouse 11 by pipeline 15, and buffer memory charging aperture 16 is connected with the lower end of warehouse 11 by pipeline, be characterized in: it also comprise be communicated with burner hearth 1 exhanst gas outlet be arranged in parallel at burner hearth exhanst gas outlet region, inlet flue duct has a down dip, the Adiabatic Cyclone separator 2 of central tube bias, material returning device 3, be arranged on the air compartment 4 of burner hearth 1 bottom from an air channel introducing burner hearth, be distributed in the secondary air channel 5 on burner hearth 1 front-back wall, the stove sodalime stone desulfurization inlet valve group 6 being communicated with secondary air channel 5, be arranged on the back-end ductwork 18 at separator top, the returning charge dipleg 19 being integrated with separator, described inlet valve group 6 is connected with blender 13 by pipeline 15, described material returning device 3 is connected with the bottom of returning charge dipleg.
Described separator is made up of the refractory material back boxing of shell and three-decker, and three layers of refractory material are respectively high-strength abrasion-proof castable, lightening casting material, light-weight insulating brick, and separator is provided with working temperature controller.
Described material returning device 3 is made up of the refractory material back boxing of shell and three-decker, and three layers of refractory material are respectively high-strength abrasion-proof castable, lightening casting material, light-weight insulating brick; The returning charge elegance high pressure cold wind of described material returning device, is sent into by little blast cap, the upper installing of the female pipe of entrance airduct flowmeter, pressure gauge, and described material returning device is provided with working temperature controller.
Secondary air channel, by being distributed in the secondary air channel nozzle on burner hearth front-back wall, is sent into the height space that the burning of lower furnace portion material needs air.Guarantee that burning proceeds to the oxygen-excess combustion stage from reducing atmosphere, improve efficiency of combustion, reduce afterbody unburned carbon in flue dust, when operation, secondary wind pressure just in time can penetrate anoxic zone.
Claims (4)
1. the circulating fluid bed boiler sodalime stone desulphurization system based on fluidised form reconstruct, comprise burner hearth (1), conveying mechanism (7), warehouse mechanism (8), pipeline (15), described conveying mechanism (7) comprises buffering chamber (14), is arranged on the blender (13) of buffering chamber bottom, and by the blower fan (9) that pipeline (15) is connected with blender (13), be also provided with buffer memory charging aperture (16) and exhaust outlet (17) on described buffering chamber top, the electric heater (10) that described warehouse mechanism (8) comprises warehouse (11), is arranged on top, the storehouse dust-precipitator (12) at warehouse (11) top, is connected with warehouse (11) lower-left side by pipeline (15) and the blower fan (9) being connected with electric heater by pipeline, the exhaust outlet (17) that buffering chamber (14) top arranges is connected with the upper right side of warehouse (11) by pipeline (15), and buffer memory charging aperture (16) is connected with the lower end of warehouse (11) by pipeline, it is characterized in that: further comprising be communicated with burner hearth (1) exhanst gas outlet be arranged in parallel at burner hearth exhanst gas outlet region, inlet flue duct has a down dip, the Adiabatic Cyclone separator (2) of central tube bias, material returning device (3), be arranged on the air compartment (4) of burner hearth (1) bottom from an air channel introducing burner hearth, be distributed in the secondary air channel (5) on burner hearth (1) front-back wall, the stove sodalime stone desulfurization inlet valve group (6) being communicated with secondary air channel (5), be arranged on the back-end ductwork (18) at separator top, the returning charge dipleg (19) being integrated with separator, described inlet valve group (6) is connected with blender (13) by pipeline (15), described material returning device (3) is connected with the bottom of returning charge dipleg.
2. a kind of circulating fluid bed boiler sodalime stone desulphurization system based on fluidised form reconstruct according to claim 1, it is characterized in that: described separator is made up of the refractory material back boxing of shell and three-decker, three layers of refractory material are respectively high-strength abrasion-proof castable, lightening casting material, light-weight insulating brick, and separator is provided with working temperature controller.
3. a kind of circulating fluid bed boiler sodalime stone desulphurization system based on fluidised form reconstruct according to claim 1, it is characterized in that: described material returning device (3) is made up of the refractory material back boxing of shell and three-decker, three layers of refractory material are respectively high-strength abrasion-proof castable, lightening casting material, light-weight insulating brick; The returning charge elegance high pressure cold wind of described material returning device, is sent into by little blast cap, the upper installing of the female pipe of entrance airduct flowmeter, pressure gauge, and described material returning device is provided with working temperature controller.
4. a kind of circulating fluid bed boiler sodalime stone desulphurization system based on fluidised form reconstruct according to claim 1, is characterized in that: the nozzle of described secondary air channel (5) is arranged on the combustion-supporting height of lower furnace portion material needs.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320833099.4U CN203615326U (en) | 2013-12-17 | 2013-12-17 | Limestone desulphurization system inside circulating fluidized bed boiler based on flow state reconstruction |
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|---|---|---|---|
| CN201320833099.4U CN203615326U (en) | 2013-12-17 | 2013-12-17 | Limestone desulphurization system inside circulating fluidized bed boiler based on flow state reconstruction |
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| CN203615326U true CN203615326U (en) | 2014-05-28 |
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| CN201320833099.4U Expired - Lifetime CN203615326U (en) | 2013-12-17 | 2013-12-17 | Limestone desulphurization system inside circulating fluidized bed boiler based on flow state reconstruction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672874A (en) * | 2013-12-17 | 2014-03-26 | 太原锅炉集团有限公司 | System for desulfurizing limestone in circulating fluidized bed boiler on basis of flow state reconstruction |
-
2013
- 2013-12-17 CN CN201320833099.4U patent/CN203615326U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672874A (en) * | 2013-12-17 | 2014-03-26 | 太原锅炉集团有限公司 | System for desulfurizing limestone in circulating fluidized bed boiler on basis of flow state reconstruction |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |