CN204063004U - The burning of self-heating fluidized bed pyrolysis solves the system that coal-powder boiler uses the contamination of high sodium coal - Google Patents
The burning of self-heating fluidized bed pyrolysis solves the system that coal-powder boiler uses the contamination of high sodium coal Download PDFInfo
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- CN204063004U CN204063004U CN201420461584.8U CN201420461584U CN204063004U CN 204063004 U CN204063004 U CN 204063004U CN 201420461584 U CN201420461584 U CN 201420461584U CN 204063004 U CN204063004 U CN 204063004U
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- pyrolysis
- coal
- fluidized bed
- combustion furnace
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 109
- 239000003245 coal Substances 0.000 title claims abstract description 51
- 239000011734 sodium Substances 0.000 title claims abstract description 35
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 34
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 34
- 238000010438 heat treatment Methods 0.000 title claims abstract description 29
- 238000011109 contamination Methods 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 title claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 58
- 239000011280 coal tar Substances 0.000 claims abstract description 31
- 239000000779 smoke Substances 0.000 claims abstract description 11
- 239000010883 coal ash Substances 0.000 claims abstract description 8
- 239000002893 slag Substances 0.000 claims abstract description 8
- 239000000428 dust Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000013021 overheating Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052728 basic metal Inorganic materials 0.000 description 1
- 150000003818 basic metals Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model relates to the burning of self-heating fluidized bed pyrolysis and solves the system that coal-powder boiler uses the contamination of high sodium coal, comprise fluidized bed pyrolysis stove and combustion furnace, the side wall lower ends of fluidized bed pyrolysis stove is provided with the outlet of pyrolysis coal tar, the outlet of pyrolysis coal tar is connected to coal tar collector, the sidewall upper of fluidized bed pyrolysis stove is provided with pyrolysis smoke outlet, pyrolysis smoke outlet is connected to pyrolysis separator, the coal ash outlet of pyrolysis separator is connected to coal tar collector, the pyrolysis gas outlet of pyrolysis separator is connected to combustion furnace, and coal tar collector is connected to combustion furnace dispenser; The exhanst gas outlet at combustion furnace top is connected to cyclone separator, is provided with slag bath bottom combustion furnace; When this system significantly reduces existing boilers of power plants high alkalinity coal convection heating surface seriously stain, high temperature corrosion and abrasion condition, stablize boiler output, ensure boiler heating surface heat transfer effect, avoid owing to staiing the convection heating surface overheating problem caused.
Description
Technical field
The utility model relates to the correlation technique that boiler heating surface stains, and is specially the burning of a kind of self-heating fluidized bed pyrolysis and solves the system that coal-powder boiler uses the contamination of high sodium coal.
Background technology
The many employings of China's thermoelectricity steam coal low grade coal inferior, the slagging scorification of boiler furnace water-cooling wall, convection heating surface contamination problems affect one of major issue that station boiler normally runs for a long time.Slagging scorification and contamination can reduce the heat transfer efficiency of boiler, affect boiler output, and the safety in operation of equipment is seriously reduced, and may cause the major accident such as boiler flameout, booster, unplanned blowing out when slagging scorification is serious.
Chinese scholars has carried out large quantifier elimination to the mechanism of slag and fouling.Research shows that minerals in coal is the basic reason causing boiler heating surface contamination, slagging scorification, wearing and tearing and corrosion.High alkalinity coal due to the volatilization of alkali metal, easily forms one deck bottoming attachment in boiler heating surface condensation in coal powder boiler combustion process.Bottoming owner will with NaCl or Na
2sO
4form exists, after mentioned component at high temperature volatilizees, easily condense in ash deposition heating surface being formed sintering or bonding, along with attachment is to the suction-operated of flying dust, heating surface appearance contamination phenomenon in various degree can be made, and soot blower cannot be used to remove, thus cause heating surface heat-transfer capability to decline, cause the problems such as exhaust gas temperature rising, finally make burner hearth exert oneself greatly reduce cause blowing out.In addition on the one hand, flue blockage and corrosion booster can be caused when staiing serious, alkali metal can form complex compound with iron phase element, metal pipe-wall is formed and gnaws the effect of biting, the compressive resistance of metal heated is reduced, cause heat-transfer surface to restrain and booster occurs, the stability that the equipment that has a strong impact on runs and reliability.
High alkalinity coal accounts for 20% of coal resources in China recoverable amount.Accurate eastern coalfield is the super-huge coalfield in recent years verified in Xinjiang, and coal resources prognostic reserves 3,900 hundred million tons are the representatives in high alkalinity coalfield.This part coal also unrealized independent utility at present, can only be utilized by the mode section mixing burning.Because Xinjiang region high alkalinity coal utilization mode is electric power stations near coal-mines, the demand of mixing the external coal of burning mode is comparatively large, and this mode is often subject to the restriction of traffic condition, greatly adds operating cost.Because the pure burning that can not realize accurate eastern coal at present utilizes and plays the advantages such as accurate eastern coal reserves reaches, price is low, cause the extensive utilization for China's a large amount of high basic metal content coal to be restricted, thus constrain the efficiency of coal resources in China utilization.Therefore, the contamination problems of high alkalinity coal is problem demanding prompt solution.
Utility model content
The purpose of this utility model is to provide the burning of self-heating fluidized bed pyrolysis and solves the system that coal-powder boiler uses the contamination of high sodium coal, when significantly reducing existing boilers of power plants high alkalinity coal convection heating surface seriously stain, high temperature corrosion and abrasion condition, stablize boiler output, ensure boiler heating surface heat transfer effect, avoid owing to staiing the convection heating surface overheating problem caused, greatly reduce the generation of pipe explosion accident, the extensive pure burning achieving high alkalinity coal utilizes.
The technical solution of the utility model is as follows:
The burning of self-heating fluidized bed pyrolysis solves the system that coal-powder boiler uses the contamination of high sodium coal, it is characterized in that: comprise fluidized bed pyrolysis stove and combustion furnace, the side wall lower ends of fluidized bed pyrolysis stove is provided with the outlet of pyrolysis coal tar, the outlet of pyrolysis coal tar is connected to coal tar collector, the sidewall upper of fluidized bed pyrolysis stove is provided with pyrolysis smoke outlet, pyrolysis smoke outlet is connected to pyrolysis separator, the coal ash outlet of pyrolysis separator is connected to coal tar collector, the pyrolysis gas outlet of pyrolysis separator is connected to combustion furnace, and coal tar collector is connected to combustion furnace dispenser; The exhanst gas outlet at combustion furnace top is connected to cyclone separator, is provided with slag bath bottom combustion furnace.
Connecting line between the pyrolysis smoke outlet of described pyrolysis separator and combustion furnace is also provided with purifier, for removing sodium process.
The side wall lower ends of described fluidized bed pyrolysis stove carries high sodium coal by coal bunker, pyrolysis oven dispenser.
Described fluidized bed pyrolysis furnace bottom is connected with pyrolysis oven air blast.
Described combustion furnace dispenser is connected incinerator fan with on the connecting line of combustion furnace, enters combustion furnace burn for carrying air.
The pyrolysis gas outlet of described cyclone separator is connected to chimney by air-introduced machine.
The dust outlet of described cyclone separator is connected to combustion furnace ashpit.
Operation principle of the present utility model is as follows:
High sodium coal sends into fluidized bed pyrolysis stove, with the air generation combustion reaction from pyrolysis oven air blast through coal bunker by pyrolysis oven dispenser.The air capacity that pyrolysis oven air blast is sent into makes part raw coal generation oxidizing fire react only, and make the raw coal generation pyrolytic reaction be left to provide heat, the temperature of fluidized bed pyrolysis stove maintains more than 1000 DEG C.Pyrolysis coal tar is collected by coal tar collector.Pyrolysis gas is separated in pyrolysis separator with coal ash.Isolated pyrolysis gas burns except sending in combustion furnace after sodium through purifier.Isolated coal ash enters coal tar collector, through combustion furnace dispenser and from the air of incinerator fan in the lump send in combustion furnace burns after mix with the coal tar collected.Flue gas after burning is delivered to chimney by air-introduced machine and is discharged after cyclone separator dedusting.The isolated dust of cyclone separator enters combustion furnace ashpit.Boiler ash drains into combustion furnace slag bath bottom combustion furnace.After high alkalinity coal carries out pyrolysis in fluidized bed pyrolysis stove, volatile sodium is removed in a large number, sodium content in coal tar declines, in the flue gas generated when the hearth combustion of combustion furnace, the content of active sodium reduces greatly, few at sodium content active in subsequent thermal face is due to flue gas, substantially do not stain.
The utility model has following beneficial effect:
(1) fundamentally decrease the alkali metal content entering boiler, prevent because of the contamination that alkali metal is too much formed on Boiler Convection Heating Surface, the safety of protection convection heating surface, improves boiler output.
(2) high sodium coal generating portion oxidizing fire reaction in fluidized bed pyrolysis bed, relies on combustion heat release can to maintain in fluidized bed pyrolysis bed pyrolysis temperature more than 1000 DEG C.Pyrolysis gas, through re-using after sodium, improves efficiency.
(3) system reform is simple, and improvement cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein, Reference numeral is: 1 coal bunker, 2 pyrolysis oven dispensers, 3 pyrolysis oven air blasts, 4 fluidized bed pyrolysis stoves, 5 pyrolysis separators, 6 purifiers, 7 coal tar collectors, 8 combustion furnace dispensers, 9 incinerator fan, 10 combustion furnaces, 11 slag baths, 12 cyclone separators, 13 combustion furnace ashpits, 14 air-introduced machines, 15 chimneys.
Detailed description of the invention
As shown in Figure 1, self-heating fluidized bed pyrolysis burning solve coal-powder boiler use high sodium coal stain system comprise fluidized bed pyrolysis stove 4 and combustion furnace 10.
The side wall lower ends of fluidized bed pyrolysis stove 4 is provided with the outlet of pyrolysis coal tar, the outlet of pyrolysis coal tar is connected to coal tar collector 7, the sidewall upper of fluidized bed pyrolysis stove 4 is provided with pyrolysis smoke outlet, pyrolysis smoke outlet is connected to pyrolysis separator 5, the coal ash outlet of pyrolysis separator 5 is connected to coal tar collector 7, the pyrolysis gas outlet of pyrolysis separator 5 is connected to combustion furnace 10, and coal tar collector 7 is connected to combustion furnace dispenser 8; The exhanst gas outlet at combustion furnace 10 top is connected to cyclone separator 12, is provided with slag bath 11 bottom combustion furnace 10.
Connecting line between the pyrolysis smoke outlet of described pyrolysis separator 5 and combustion furnace 10 is also provided with purifier 6, for removing sodium process.
The side wall lower ends of described fluidized bed pyrolysis stove 4 carries high sodium coal by coal bunker 1, pyrolysis oven dispenser 2.
Pyrolysis oven air blast 3 is connected with bottom described fluidized bed pyrolysis stove 4.
Described combustion furnace dispenser 8 is connected incinerator fan 9 with on the connecting line of combustion furnace 10, enters combustion furnace 10 burn for carrying air.
The pyrolysis gas outlet of described cyclone separator 12 is connected to chimney 15 by air-introduced machine 14.
The dust outlet of described cyclone separator 12 is connected to combustion furnace ashpit 13.
Operation principle of the present utility model is as follows:
High sodium coal sends into fluidized bed pyrolysis stove 4 through coal bunker 1 by pyrolysis oven dispenser 2, with the air generation combustion reaction from pyrolysis oven air blast 3.The air capacity that pyrolysis oven air blast 3 is sent into makes part raw coal generation oxidizing fire react only, and make the raw coal generation pyrolytic reaction be left to provide heat, the temperature of fluidized bed pyrolysis stove 4 maintains more than 1000 DEG C.Pyrolysis coal tar is collected by coal tar collector 7.Pyrolysis gas is separated in pyrolysis separator 5 with coal ash.Isolated pyrolysis gas burns except sending in combustion furnace 10 after sodium through purifier 6.Isolated coal ash enters coal tar collector 7, through combustion furnace dispenser 8 and from the air of incinerator fan 9 in the lump send in combustion furnace 10 burns after mix with the coal tar collected.Flue gas after burning is delivered to chimney 15 by air-introduced machine 14 and is discharged after cyclone separator 12 dedusting.The isolated dust of cyclone separator 12 enters combustion furnace ashpit 13.Boiler ash drains into combustion furnace slag bath 11 bottom combustion furnace 10.
After high alkalinity coal carries out pyrolysis in fluidized bed pyrolysis stove 4, volatile sodium is removed in a large number, sodium content in coal tar declines, in the flue gas generated when the hearth combustion of combustion furnace 10, the content of active sodium reduces greatly, few at sodium content active in subsequent thermal face is due to flue gas, substantially do not stain.
Claims (7)
1. the burning of self-heating fluidized bed pyrolysis solves the system that coal-powder boiler uses the contamination of high sodium coal, it is characterized in that: comprise fluidized bed pyrolysis stove (4) and combustion furnace (10), the side wall lower ends of fluidized bed pyrolysis stove (4) is provided with the outlet of pyrolysis coal tar, the outlet of pyrolysis coal tar is connected to coal tar collector (7), the sidewall upper of fluidized bed pyrolysis stove (4) is provided with pyrolysis smoke outlet, pyrolysis smoke outlet is connected to pyrolysis separator (5), the coal ash outlet of pyrolysis separator (5) is connected to coal tar collector (7), the pyrolysis gas outlet of pyrolysis separator (5) is connected to combustion furnace (10), coal tar collector (7) is connected to combustion furnace dispenser (8), the exhanst gas outlet at combustion furnace (10) top is connected to cyclone separator (12), and combustion furnace (10) bottom is provided with slag bath (11).
2. self-heating fluidized bed pyrolysis burning according to claim 1 solves the system that coal-powder boiler uses the contamination of high sodium coal, it is characterized in that: the connecting line between the pyrolysis smoke outlet of described pyrolysis separator (5) and combustion furnace (10) is also provided with purifier (6), for removing sodium process.
3. self-heating fluidized bed pyrolysis burning according to claim 1 solves the system that coal-powder boiler uses the contamination of high sodium coal, it is characterized in that: the side wall lower ends of described fluidized bed pyrolysis stove (4) carries high sodium coal by coal bunker (1), pyrolysis oven dispenser (2).
4. self-heating fluidized bed pyrolysis burning according to claim 1 solves the system that coal-powder boiler uses the contamination of high sodium coal, it is characterized in that: described fluidized bed pyrolysis stove (4) bottom is connected with pyrolysis oven air blast (3).
5. self-heating fluidized bed pyrolysis burning according to claim 1 solves the system that coal-powder boiler uses the contamination of high sodium coal, it is characterized in that: described combustion furnace dispenser (8) is connected incinerator fan (9) with on the connecting line of combustion furnace (10), enter combustion furnace (10) for carrying air and burn.
6. self-heating fluidized bed pyrolysis burning according to claim 1 solves the system that coal-powder boiler uses the contamination of high sodium coal, it is characterized in that: the pyrolysis gas outlet of described cyclone separator (12) is connected to chimney (15) by air-introduced machine (14).
7. self-heating fluidized bed pyrolysis burning according to claim 1 solves the system that coal-powder boiler uses the contamination of high sodium coal, it is characterized in that: the dust outlet of described cyclone separator (12) is connected to combustion furnace ashpit (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420461584.8U CN204063004U (en) | 2014-08-15 | 2014-08-15 | The burning of self-heating fluidized bed pyrolysis solves the system that coal-powder boiler uses the contamination of high sodium coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420461584.8U CN204063004U (en) | 2014-08-15 | 2014-08-15 | The burning of self-heating fluidized bed pyrolysis solves the system that coal-powder boiler uses the contamination of high sodium coal |
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| Publication Number | Publication Date |
|---|---|
| CN204063004U true CN204063004U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420461584.8U Expired - Lifetime CN204063004U (en) | 2014-08-15 | 2014-08-15 | The burning of self-heating fluidized bed pyrolysis solves the system that coal-powder boiler uses the contamination of high sodium coal |
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| CN (1) | CN204063004U (en) |
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2014
- 2014-08-15 CN CN201420461584.8U patent/CN204063004U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180424 Address after: 610000, No. 18, West core road, hi tech West District, Sichuan, Chengdu Patentee after: DONGFANG ELECTRIC Co.,Ltd. Address before: Jinniu District Chengdu City, Sichuan province 610036 Shu Road No. 333 Patentee before: DONGFANG ELECTRIC Corp. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141231 |