CN102798112A - Boiler capable of preventing scorification and dust stratification - Google Patents
Boiler capable of preventing scorification and dust stratification Download PDFInfo
- Publication number
- CN102798112A CN102798112A CN201210328883XA CN201210328883A CN102798112A CN 102798112 A CN102798112 A CN 102798112A CN 201210328883X A CN201210328883X A CN 201210328883XA CN 201210328883 A CN201210328883 A CN 201210328883A CN 102798112 A CN102798112 A CN 102798112A
- Authority
- CN
- China
- Prior art keywords
- flue
- boiler
- shock chamber
- comer
- import
- Prior art date
- 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.)
- Granted
Links
- 239000000428 dust Substances 0.000 title claims abstract description 27
- 238000013517 stratification Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000035939 shock Effects 0.000 claims abstract description 34
- 239000003546 flue gas Substances 0.000 claims abstract description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000008676 import Effects 0.000 claims description 24
- 229910052783 alkali metal Inorganic materials 0.000 claims description 12
- 150000001340 alkali metals Chemical class 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 4
- 239000003500 flue dust Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000003245 coal Substances 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 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 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 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
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 flue gas alkali metal Chemical class 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000001883 metal evaporation Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Images
Abstract
The invention relates to a technology for preventing scorification and dust stratification in a boiler, and in particular relates to a boiler capable of preventing scorification and dust stratification. The boiler comprises a hearth and a flue communicated with the hearth, wherein a platen superheater is arranged at the top of the hearth; the flue is internally provided with a convection superheater and a reheater; a low-temperature area is arranged behind the flue in which the convection superheater and the reheater are arranged; a declining pipe is arranged at the bottom of the flue adjoining to the front end of the low-temperature area; a shock chamber is arranged at the lower end of the declining pipe; an outlet at the bottom of the shock chamber is connected to an inlet of a clarifying tank; the inlet of the clarifying tank is connected to an inlet of a filter; the inlet of the filter is connected to an inlet of a secondary heat exchanger; an outlet of the secondary heat exchanger is communicated to an chilling water inlet at the wall of the declining pipe through a plurality of pipelines; and an outlet at the upper end of the side wall of the shock chamber is connected with a tail flue. Water bath dedusting is carried out on the flue gas by using the shock chamber arranged at the tail of the boiler, scorification and dust stratification of a heated surface in the low-temperature area of the boiler are reduced, the heat exchanging efficiency of an heat exchange surface is improved, and the boiler steam rate is stabilized.
Description
Technical field
The present invention relates to prevent the technology of pulverized-coal fired boiler slagging scorification dust stratification, particularly a kind of boiler that prevents the slagging scorification dust stratification.
Background technology
The high alkalinity coal owing to the volatilization of alkali metal, forms one deck bottoming attachment in the heating surface condensation easily in combustion process.Along with the suction-operated of attachment to flying dust; Can make heating surface contamination and fouling phenomenon in various degree occur, and can't use soot blower to remove, thereby increase the heat exchange thermal resistance; Reduce the heat exchange efficiency of heat-transfer surface, finally make burner hearth exert oneself to reduce greatly and cause blowing out.Dust stratification has influenced the appropriate design layout of heating surface simultaneously, causes exhaust gas temperature to raise.In addition on the one hand, alkali metal can form complex compound with the iron phase element, metal pipe-wall is formed gnaw the effect of biting, and makes metal heated compressive resistance reduce, and causes the heat-transfer surface tube bank that booster takes place, and has a strong impact on operation stability of equipment and reliability.Dust stratification stains the safety and economy operation that is having a strong impact on boiler in a word.
Pulverized-coal fired boiler dust stratification problem is the ubiquitous phenomenon of present thermal power plant, and gently then influence is conducted heat, and forces the operation of boiler load down, reduces the efficient of boiler; Heavy then cause unplanned blowing out or cause serious accident, be a difficult problem that jeopardizes the safe and economical boiler operation.Domesticly also lack the engineering operation experience for burning high alkalinity coal, only indivedual at present power plant are in the overbasic utilization of combustion research.For because alkali metal evaporation causes the slagging scorification problem; It is a difficult problem of boiler operatiopn always; Time of last a century has been carried out in the research of station boiler slagging scorification, and the settling mode that sums up comprises that outer coal is mixed burning, the ignition temperature field is optimized tissue, added modified material etc.Outer coal is mixed the burning problem and is actually through adding other low alkalinity metal coals, has reduced alkali-metal relative amount in the raw coal, and the demand of the external coal of this mode is bigger, if former coal utilization mode is an electric power stations near coal-mines, this mode often receives the restriction of traffic condition; The heterogeneity that tissue can effectively be avoided the temperature field is optimized in the ignition temperature field, can locally solve for the slagging scorification problem of high-temperature area; Add the restriction that modified material receives coal characteristic and cost etc., more difficult large-scale application.Therefore, because the difficulty of problem itself, never have a reasonable mode and treat the direct combustion problem of high sodium coal and solve, reach the purpose of directly utilizing high sodium coal combustion, equipment to be in reliable and stable operation.
Summary of the invention
The present invention is for solving existing station boiler low-temperature space slagging scorification fouling phenomenon; A kind of boiler that prevents the slagging scorification dust stratification is provided; Through transforming boiler back end ductwork, increased the shock chamber alkali metal and flying dust have been adsorbed, solved slagging scorification and dust stratification from the source.
For solving the problems of the technologies described above, technical scheme of the present invention is following:
A kind of boiler that prevents the slagging scorification dust stratification comprises burner hearth, the flue that is communicated with burner hearth, and roof of the furnace is provided with pendant superheater; Be provided with convection superheater and reheater in the flue; The back of convection superheater and reheater place flue is a low-temperature space, and it is characterized in that: the bottom of the flue adjacent with the low-temperature space front end is provided with down-comer, and the down-comer lower end is provided with the shock chamber; The outlet of bottom, shock chamber is connected to the import of defecator; The import of defecator is connected to the import of filter, and the import of filter is connected to the import of secondary heat exchange device, and the outlet of secondary heat exchange device is communicated to the chilled water import that is positioned at the down-comer tube wall through plurality of conduits; The outlet of the sidewall upper of said shock chamber connects back-end ductwork.
Said chilled water import evenly distributes along the circumference of down-comer tube wall, and chilled water slowly flows downward along the down-comer inwall after getting into down-comer, forms water membrane.
Be provided with air preheater in the said back-end ductwork.
Be provided with water pump between said defecator and the filter.
The outlet of said shock chamber sidewall upper is connected with flange with back-end ductwork.
Operation principle of the present invention is following:
Flue gas in the burner hearth gets into flue, and with pendant superheater, convection superheater, the abundant heat exchange of reheater, before getting into the easy low-temperature space that condenses of alkali metal, flue gas got into the shock chamber through down-comer and carries out water-bath; When carrying out water-bath, because chilled water import circumference evenly distributes, chilled water slowly flows downward along the down-comer inwall; Form water membrane; When flue gas got into the shock chamber through down-comer, flue gas was forced to wash fully with chilled water, and flying dust in the flue gas and the alkali metal that condenses easily are removed; Form buck, reach the purification purpose of flue dust; Get into back-end ductwork through the flue gas after the Quench by shock chamber's outlet, carry out heat exchange, reduce exhaust gas temperature with air preheater; The buck of shock chamber bottom gets into defecator, in defecator buck by preliminary treatment after, by water pump buck is beaten toward filter and further to be purified buck, carry out flue gas washing after get into the shock chamber after the heat exchange of secondary heat exchange device again, recycle.
Beneficial effect of the present invention is following:
(1) utilizes in the boiler of high alkalinity coal in burning, adopt shock chamber's water-bath, flue gas is carried out water bath dust-removing, reduced the slagging scorification and the dust stratification of boiler low-temperature district heating surface, improved the heat exchange efficiency of heat-transfer surface, stablize boiler output;
(2) reduce in the flue gas alkali metal to the corrosion of boiler heating surface, improved the operation of boiler safety and economy;
(3) adopt chilled water that the sensible heat of flue gas is reclaimed, chilled water is handled the back recycle, reduce thermal losses as much as possible;
(4) adopt flange to connect, with the flue zones of different separately, can adopt unlike material respectively, thereby reduce cost;
(5) improvement structure of the present invention is not limited to use the high alkalinity coal burning boiler, and is suitable equally to other pulverized-coal fired boiler slagging scorification dust stratifications.
Description of drawings
Fig. 1 is a structural representation of the present invention
Wherein, Reference numeral is following: 1 burner hearth, 2 pendant superheaters, 3 convection superheaters, 4 reheaters, 5 down-comers, 6 shock chambers, 7 defecators, 8 water pumps, 9 filters, 10 secondary heat exchange devices, 11 air preheaters.
The specific embodiment
As shown in Figure 1; A kind of boiler that prevents the slagging scorification dust stratification comprises burner hearth 1, the flue that is communicated with burner hearth 1, and burner hearth 1 top is provided with pendant superheater 2; Be provided with convection superheater 3 and reheater 4 in the flue; Convection superheater 3 is a low-temperature space with the back of reheater 4 place flues, and the bottom of the flue adjacent with the low-temperature space front end is provided with down-comer 5, and down-comer 5 lower ends are provided with shock chamber 6; The outlet of 6 bottoms, shock chamber is connected to the import of defecator 7; The import of defecator 7 is connected to the import of filter 9, and the import of filter 9 is connected to the import of secondary heat exchange device 10, and the outlet of secondary heat exchange device 10 is communicated to the chilled water import that is positioned at down-comer 5 tube walls through plurality of conduits; The outlet of the sidewall upper of said shock chamber 6 connects back-end ductwork.
Said chilled water import evenly distributes along the circumference of down-comer 5 tube walls, and chilled water slowly flows downward along down-comer 5 inwalls after getting into down-comer 5, forms water membrane.
Be provided with air preheater 11 in the said back-end ductwork.
Be provided with water pump 8 between said defecator 7 and the filter 9.
The outlet of said shock chamber 6 sidewall upper is connected with flange with back-end ductwork.
Operation principle of the present invention is following:
Flue gas in the burner hearth 1 gets into flue, and with pendant superheater 2, convection superheater 3, reheater 4 abundant heat exchange, before getting into the easy low-temperature space that condenses of alkali metal, flue gas got into shock chamber 6 through down-comer 5 and carries out water-bath; When carrying out water-bath, because chilled water import circumference evenly distributes, chilled water slowly flows downward along down-comer 5 inwalls; Form water membrane; When flue gas passed through down-comer 5 entering shock chambers 6, flue gas was forced to wash fully with chilled water, and flying dust in the flue gas and the alkali metal that condenses easily are removed; Form buck, reach the purification purpose of flue dust; Get into back-end ductwork through the flue gas after the Quench by shock chamber's 6 outlets, carry out heat exchange, reduce exhaust gas temperature with air preheater 11; The buck of 6 bottoms, shock chamber gets into defecator 7; In defecator 7 buck by preliminary treatment after; By water pump 8 buck is made past filter 9 and further purify buck, carry out flue gas washing after get into shock chamber 6 after 10 heat exchange of secondary heat exchange device again, recycle.
Claims (6)
1. boiler that prevents the slagging scorification dust stratification; Comprise burner hearth (1), the flue that is communicated with burner hearth (1); Burner hearth (1) top is provided with pendant superheater (2), is provided with convection superheater (3) and reheater (4) in the flue, and the back of convection superheater (3) and reheater (4) place flue is a low-temperature space; It is characterized in that: the bottom of the flue adjacent with the low-temperature space front end is provided with down-comer (5); Down-comer (5) lower end is provided with shock chamber (6), and the outlet of shock chamber (6) bottom is connected to the import of defecator (7), and the import of defecator (7) is connected to the import of filter (9); The import of filter (9) is connected to the import of secondary heat exchange device (10), and the outlet of secondary heat exchange device (10) is communicated to the chilled water import that is positioned at down-comer (5) tube wall through plurality of conduits; The outlet of the sidewall upper of said shock chamber (6) connects back-end ductwork.
2. a kind of boiler that prevents the slagging scorification dust stratification according to claim 1; It is characterized in that: said chilled water import evenly distributes along the circumference of down-comer (5) tube wall; Chilled water slowly flows downward along down-comer (5) inwall after getting into down-comer (5), forms water membrane.
3. a kind of boiler that prevents the slagging scorification dust stratification according to claim 1 is characterized in that: be provided with air preheater (11) in the said back-end ductwork.
4. a kind of boiler that prevents the slagging scorification dust stratification according to claim 1 is characterized in that: be provided with water pump (8) between said defecator (7) and the filter (9).
5. a kind of boiler that prevents the slagging scorification dust stratification according to claim 1 is characterized in that: the outlet of said shock chamber (6) sidewall upper is connected with flange with back-end ductwork.
6. according to any described a kind of boiler that prevents the slagging scorification dust stratification of claim 1-5; It is characterized in that its operation principle is: the flue gas in the burner hearth (1) gets into flue; With pendant superheater (2), convection superheater (3), fully heat exchange of reheater (4); Before getting into the easy low-temperature space that condenses of alkali metal, flue gas got into shock chamber (6) through down-comer (5) and carried out water-bath; When carrying out water-bath, because chilled water import circumference evenly distributes, chilled water slowly flows downward along down-comer (5) inwall; Form water membrane; When flue gas got into shock chamber (6) through down-comer (5), flue gas was forced to wash fully with chilled water, and flying dust in the flue gas and the alkali metal that condenses easily are removed; Form buck, reach the purification purpose of flue dust; Get into back-end ductwork through the flue gas after the Quench by shock chamber (6) outlet, carry out heat exchange, reduce exhaust gas temperature with air preheater (11); The buck of bottom, shock chamber (6) gets into defecator (7); In defecator (7) buck by preliminary treatment after; By water pump (8) buck is made past filter (9) and further purify buck; Carry out flue gas washing, recycle after get into shock chamber (6) after secondary heat exchange device (10) heat exchange again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210328883.XA CN102798112B (en) | 2012-09-07 | 2012-09-07 | Boiler capable of preventing scorification and dust stratification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210328883.XA CN102798112B (en) | 2012-09-07 | 2012-09-07 | Boiler capable of preventing scorification and dust stratification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102798112A true CN102798112A (en) | 2012-11-28 |
| CN102798112B CN102798112B (en) | 2015-07-08 |
Family
ID=47197326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210328883.XA Active CN102798112B (en) | 2012-09-07 | 2012-09-07 | Boiler capable of preventing scorification and dust stratification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102798112B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106195996A (en) * | 2016-06-30 | 2016-12-07 | 禹州市神运机械有限公司 | A kind of ossicated circulation boiler furnace apparatus |
| CN108119896A (en) * | 2017-12-18 | 2018-06-05 | 国网新疆电力有限公司电力科学研究院 | It is a kind of to improve accurate eastern coal combustion slagging, the multifuel combustion method of fouling characteristics |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3872836A (en) * | 1973-09-18 | 1975-03-25 | Foster Wheeler Corp | Coal-fired generator of medium to large capacity |
| SU1733844A1 (en) * | 1990-02-14 | 1992-05-15 | Томский политехнический институт им.С.М.Кирова | Boiler |
| CN100429194C (en) * | 2006-09-28 | 2008-10-29 | 南京大学 | Method for utilizing reaction heat in process of producing methane chloride and purifying mixture |
| CN101298569B (en) * | 2008-06-26 | 2011-05-11 | 华东理工大学 | Gasification method of shock chilling type pulp or powder carbonaceous material |
| CN102434357A (en) * | 2011-10-21 | 2012-05-02 | 华北电力大学（保定） | System for generating power employing condensed water of flue gases in supercharged oxygen-enriched coal burning boiler |
| CN202813331U (en) * | 2012-09-07 | 2013-03-20 | 中国东方电气集团有限公司 | Slag-bonding and dust accumulation preventing boiler |
-
2012
- 2012-09-07 CN CN201210328883.XA patent/CN102798112B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3872836A (en) * | 1973-09-18 | 1975-03-25 | Foster Wheeler Corp | Coal-fired generator of medium to large capacity |
| SU1733844A1 (en) * | 1990-02-14 | 1992-05-15 | Томский политехнический институт им.С.М.Кирова | Boiler |
| CN100429194C (en) * | 2006-09-28 | 2008-10-29 | 南京大学 | Method for utilizing reaction heat in process of producing methane chloride and purifying mixture |
| CN101298569B (en) * | 2008-06-26 | 2011-05-11 | 华东理工大学 | Gasification method of shock chilling type pulp or powder carbonaceous material |
| CN102434357A (en) * | 2011-10-21 | 2012-05-02 | 华北电力大学（保定） | System for generating power employing condensed water of flue gases in supercharged oxygen-enriched coal burning boiler |
| CN202813331U (en) * | 2012-09-07 | 2013-03-20 | 中国东方电气集团有限公司 | Slag-bonding and dust accumulation preventing boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106195996A (en) * | 2016-06-30 | 2016-12-07 | 禹州市神运机械有限公司 | A kind of ossicated circulation boiler furnace apparatus |
| CN108119896A (en) * | 2017-12-18 | 2018-06-05 | 国网新疆电力有限公司电力科学研究院 | It is a kind of to improve accurate eastern coal combustion slagging, the multifuel combustion method of fouling characteristics |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102798112B (en) | 2015-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105318535B (en) | A kind of single drum horizontal formula traveling-grate stoker sprays denitration corner tube boiler | |
| CN100358800C (en) | Electric furnace method yellow phosphorus tail gas residual heat comprehensive balance utilizing system | |
| CN203068991U (en) | Combined waste heat utilization heat pipe waste heat boiler | |
| CN102798112B (en) | Boiler capable of preventing scorification and dust stratification | |
| CN104406144A (en) | Double-medium waste heat boiler | |
| CN102798131B (en) | A kind of boiler preventing contamination coking | |
| CN102305394A (en) | Coking furnace flue-gas waste-heat boiler | |
| CN204372879U (en) | A kind of two medium waste heat boiler | |
| CN101929670A (en) | Oilfield steam injection boiler | |
| CN202813331U (en) | Slag-bonding and dust accumulation preventing boiler | |
| CN204005923U (en) | A kind of boiler waste heat recovery system | |
| CN105318307B (en) | A kind of double-barrel transverse formula expansion chamber sprays denitration corner tube boiler | |
| CN203203010U (en) | Boiler for yellow phosphorus tail gas combustion | |
| CN210861049U (en) | Gas boiler flue gas waste heat and condensate water recycling system | |
| CN105716281A (en) | Waste heat recycling system with heat pipe exchanger | |
| CN204043191U (en) | A kind of single drum horizontal formula traveling-grate stoker spray denitration corner tube boiler | |
| CN204880679U (en) | Energy -saving boiler of tape trailer gas disposal | |
| CN204901732U (en) | Modular waste heat of boiler flue gas recovery system | |
| CN204345689U (en) | Shunting string sheet flue gas waste heat recoverer in efficient | |
| CN211005275U (en) | System for heating rich oil and debenzolization heat source by using flue gas waste heat | |
| CN104100957B (en) | A kind of boiler waste heat recovery system | |
| CN203147745U (en) | Integrated hearth and flue biomass fluidized bed boiler | |
| CN202813767U (en) | Multi-function tube furnace | |
| CN202719584U (en) | Heat recovery boiler utilizing residual heat resources of flue gas of coke oven | |
| CN105318309A (en) | Two-drum spraying denitration settling separation corner-tube boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180426 Address after: 610000 18 West core road, hi-tech West District, Chengdu, Sichuan Patentee after: Dongfang Electric Co., Ltd. Address before: 610036 Shu Han Road, Jinniu District, Chengdu, Sichuan Province, No. 333 Patentee before: Dongfang Electric Corporation |
|
| TR01 | Transfer of patent right |