CN1308615C - Boiler device with wall fitted burner for preventing water-cooled wall corroded by high-temp and slagging scorification - Google Patents
Boiler device with wall fitted burner for preventing water-cooled wall corroded by high-temp and slagging scorification Download PDFInfo
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- CN1308615C CN1308615C CNB2005100097722A CN200510009772A CN1308615C CN 1308615 C CN1308615 C CN 1308615C CN B2005100097722 A CNB2005100097722 A CN B2005100097722A CN 200510009772 A CN200510009772 A CN 200510009772A CN 1308615 C CN1308615 C CN 1308615C
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Abstract
The present invention relates to a boiler device with a wall type arranged burner capable of preventing the temperature corrosion and the slag bonding of a water-cooled wall, which relates to a boiler device for preventing corrosion and slag bonding. The high temperature corrosion of a water-cooled wall of a burner zone is a problem commonly existing in a boiler of a coal burning power plant, and the problem is not effectively solved for a long time. The present invention provides the boiler device with a wall type arranged burner capable of preventing the temperature corrosion and the slag bonding of a water-cooled wall, which has the advantages of simple structure, easy operation and good effect. The present invention comprises a boiler body 1 and burners 2, wherein the boiler body 1 is composed of a front wall 1-1, a back wall 1-2 and side walls 1-3. Two side walls 1-3 are water-cooled walls which are formed by the close connection of water-cooled wall pipes 1-3-1 and fin sheets 1-3-3. The burners 2 are arranged on the front wall 1-1 and the back wall 1-2. The two side walls 1-3 are communicated with a wind channel 5 by wall sticking wind boxes 4, and the fin sheets 1-3-3 on the two side walls are disassembled to form gaps 1-3-2. The present invention has excellent anticorrosive and slag bonding preventive effects. An anticorrosive and slag bonding preventive effective rate achieves above 90% through a test. The present invention is favorable for popularization and application.
Description
Technical field:
The present invention relates to a kind of boiler plant that prevents to corrode with slagging scorification.
Background technology:
The high temperature corrosion of burner region water-cooling wall is the ubiquitous problem of coal-fired power station boiler, and also being influences the one of the main reasons that electric power safety is produced.The high temperature corrosion of burner region water-cooling wall is a complex physicochemical process, and near the moving situation of temperature, gas componant, coal characteristic and coal dust particle that main and water-cooling wall are is relevant.1, near the temperature height water-cooling wall.Because the stove internal combustion is inhomogeneous, local temperature increases near the water-cooling wall, and the water-cooling wall wall surface temperature is improved, and at high temperature the water-cooling wall metal pipe material is aging easily, the performance reduction of resistance to wearing and corroding.2, the smoke components of water-cooling wall near zone is reducing atmosphere.Coal dust is in the process of burning, and the mineral composition in the coal constantly evaporates, and wherein some forms SO
2, HCl, NaOH and H
2The material that corrosivity such as S are stronger, and when near the flue gas the water-cooling wall is in reducing atmosphere, reducing atmosphere will cause the decline of ash fusion point and ash deposition process to be accelerated, thereby quicken the corrosion of heating surface.According to statistics, the about meager coal unit boiler existence burner region water wall high temperature corrosion in various degree that uses more than 80% of China is after the burner region water-cooling wall generation high temperature corrosion; the water-cooling wall wall thickness reduction; intensity reduces, and causes booster and leakage easily, the crisis safe operation of the boiler.At present, for preventing high temperature corrosion, avoid the generation of boiler pipe explosion accident, at the main cause that influences high temperature corrosion, domesticly prevent that the measure of high temperature corrosion from mainly containing: can adopt corrosion-resistant high-alloy steel, aluminizing pipe and in outer surfacecti proteon mode such as carborundum coating, the reduction corrosion rate of laying of pipe.Improve the erosion-resisting ability of metal, adopt corrosion-resistant high-alloy steel, or to carry out the metal material surface protection be a kind of passive mode after all that cost higher again (compare with carbon steel pipe as aluminizing pipe, fee of material approximately doubles) simultaneously is not suitable for the national conditions of China.Therefore, research burner wall formula arranges that the water-cooling wall of boiler prevents that the high temperature corrosion technology all has crucial meaning to China's power industry and development and national economy.Near temperature height water-cooling wall, when the smoke components of water-cooling wall near zone was reducing atmosphere, the hearth combustor zone was easy to take place the slagging scorification phenomenon, after slagging scorification takes place, superheater overtemperature tube burst, same crisis safe operation of the boiler.
Summary of the invention:
For solving is the boiler-burner zone high temperature corrosion of fuel and the problem of slagging scorification at present with the coal dust, the invention provides a kind of simple in structure, the boiler plant that easy operating and the effective burner wall formula that prevents water wall high temperature corrosion and slagging scorification are arranged, it comprises body of heater 1 and burner 2, described body of heater 1 is by front wall 1-1, back wall 1-2, side wall 1-3 forms, both walls 1-3 is the water-cooling wall that is closely connected to form by water screen tube 1-3-1 and fin 1-3-3, on front wall 1-1 and back wall 1-2, burner 2 is housed, both walls 1-3 is by adherent wind bellows 4, connect the airduct 5 between adherent wind bellows 4 and the secondary air duct 7, be communicated with secondary air duct 7, and the fin 1-3-3 on the both walls 1-3 is taken off formation slit 1-3-2.The present invention is simple in structure, form adherent wind from airduct 5 wind that slit by water-cooling wall enters in the burner hearth of coming in, make near air film of formation of both walls water-cooling wall, this atmosphere is oxidizing atmosphere, destroy the prerequisite reducing atmosphere of formation high temperature corrosion, thereby prevented the both walls high temperature corrosion; Simultaneously, adherent wind-warm syndrome degree is low, has reduced near the temperature of water-cooling wall, also helps preventing the both walls high temperature corrosion; The center powder-feeding cyclone burner for pulverized coal is housed on body of heater, gather to the burner center from the coal dust of center powder-feeding cyclone burner for pulverized coal ejection, reduced near the coal dust amount of both walls water-cooling wall that impacts, reduced near the burning of coal dust water-cooling wall, help reducing near the temperature of both walls water-cooling wall, and help near the oxidizing atmosphere of strengthen water-cooled wall, prevented the both walls high temperature corrosion from another point of view.Slagging scorification is that the ash of molten condition or coal dust stick to the phenomenon on the water-cooling wall, under oxidizing atmosphere, and the fusion point of ash height, ash is not easy fusion, so be not easy to form slagging scorification.The coal dust of burner of the present invention gathers to the burner center, has reduced near the coal dust amount both walls water-cooling wall that impacts, and sticks to chance on the water-cooling wall thereby reduced the ash of molten condition or coal dust, has prevented slagging scorification.The present invention is from improving furnace binding simultaneously and start with in burner two aspects, and the boiler plant of this structure has the effect of fabulous anticorrosion and slagging scorification, and through actual tests, the efficient of anticorrosion and slagging scorification reaches more than 90%, is beneficial to and applies.
Description of drawings:
Fig. 1 is the structural representation of existing boiler plant water-cooling wall, Fig. 2 is the structure and the working state schematic representation of product of the present invention, Fig. 3 is the A-A cutaway view of Fig. 2, and Fig. 4 is the B place structure enlarged diagram of Fig. 2, and Fig. 5 is the structural representation of center powder-feeding cyclone burner for pulverized coal.
The specific embodiment:
The specific embodiment one: with reference to Fig. 1, Fig. 2, present embodiment prevents the boiler plant that the burner wall formula of water wall high temperature corrosion and slagging scorification is arranged, it comprises body of heater 1 and burner 2, described body of heater 1 is made up of front wall 1-1, back wall 1-2, side wall 1-3, both walls 1-3 is the water-cooling wall that is closely connected to form by water screen tube 1-3-1 and fin 1-3-3, both walls 1-3 is by the airduct 5 between adherent wind bellows 4, the adherent wind bellows 4 of connection and the secondary air duct 7, be communicated with secondary air duct 7, the fin 1-3-3 on the both walls 1-3 taken off form slit 1-3-2.Adherent wind bellows 4 are installed on both walls 1-3, adherent wind bellows 4 are communicated with airduct 5, the other end of airduct 5 is arranged in the secondary air duct 7, hot blast air door 5-1 is housed on airduct 5, in the boiler-burner zone of body of heater 1 four smoke components on-line samplers 6 are housed, when the smoke components of on-line measurement boiler both walls is in reducing atmosphere, hot blast air door 5-1 opens greatly, the hot blast rate of airduct 5 of flowing through increases, speed measuring device 5-2 is installed on airduct 5, it can measure the air quantity of adherent wind, control adherent wind air quantity and go into below 10% of stove total blast volume less than boiler, adherent wind enters adherent wind bellows 4, and the slit 1-3-2 by water-cooling wall enters burner hearth again, make the both walls water-cooling wall near one deck air flow stream mistake is arranged.With reference to Fig. 2, the number of plies of the adherent wind bellows 4 of every side wall 1-3 is 3 layers in the present embodiment, by the positional alignment setting of upper, middle and lower, and also can be according to the high temperature corrosion position and the definite number of plies of arranging adherent wind bellows 4 of extent of corrosion.
With reference to Fig. 3, on front wall 1-1 and back wall 1-2, burner 2 is housed, burner 2 is the center powder-feeding cyclone burner for pulverized coal, its structure is, be vertically arranged with one time airduct 2-2 in the center of burner shell 2-1, the end that airduct 2-2 is positioned at burner shell 2-1 is nozzles 2-3, and pulverized coal feed pipe 2-4 is connected with an airduct 2-2, be provided with the eseparation ring 2-5 of conical ring in an airduct 2-2, the small end of eseparation ring 2-5 is towards nozzles 2-3.After the coal dust air of sending here from wind pulverized coal feed pipe 2-4 flowed into taper eseparation ring 2-5 in airduct 2-2 of burner, coal dust was concentrated in the center of burner, sprayed into burner hearth by middle the heart channel of Hang-Shaoyin nozzles 2-3 of burner.Spray into the center recirculating zone core of position over against burner.Because coal dust gathers to the burner center, just reduced near the impacting coal dust amount both walls water-cooling wall, stick to chance on the water-cooling wall thereby reduced the ash of molten condition or coal dust, thereby prevented slagging scorification.
Claims (8)
1. boiler plant that the burner wall formula that prevents water wall high temperature corrosion and slagging scorification is arranged, it comprises body of heater (1) and burner (2), described body of heater (1) is by front wall (1-1), back wall (1-2), side wall (1-3) is formed, both walls (1-3) is the water-cooling wall that is closely connected to form by water screen tube (1-3-1) and fin (1-3-3), on front wall (1-1) and back wall (1-2), burner (2) is housed, it is characterized in that both walls (1-3) is by adherent wind bellows (4), connect the airduct (5) between adherent wind bellows (4) and the secondary air duct (7), be communicated with secondary air duct (7), and the fin (1-3-3) on the both walls (1-3) is taken off formation slit (1-3-2).
2. the boiler plant that prevents the burner wall formula layout of water wall high temperature corrosion and slagging scorification according to claim 1 is characterized in that at front wall (1-1) and the last burner (2) that is provided with of back wall (1-2) be the center powder-feeding cyclone burner for pulverized coal.
3. the boiler plant that prevents the burner wall formula layout of water wall high temperature corrosion and slagging scorification according to claim 2, the structure that it is characterized in that described center powder-feeding cyclone burner for pulverized coal is, be vertically arranged with an airduct (2-2) in the center of burner shell (2-1), the end that an airduct (2-2) is positioned at burner shell (2-1) is nozzles (2-3), pulverized coal feed pipe (2-4) is connected with an airduct (2-2), be provided with the eseparation ring (2-5) of conical ring in an airduct (2-2), the small end of eseparation ring (2-5) is towards nozzles (2-3).
4. according to claim 1, the 2 or 3 described boiler plants that prevent the burner wall formula layout of water wall high temperature corrosion and slagging scorification, it is characterized in that on airduct (5), being equipped with hot blast air door (5-1).
5. according to claim 1, the 2 or 3 described boiler plants that prevent the burner wall formula layout of water wall high temperature corrosion and slagging scorification, it is characterized in that the number of plies of the adherent wind bellows (4) of every side wall (1-3) is 3 layers.
6. according to claim 1, the 2 or 3 described boiler plants that prevent the burner wall formula layout of water wall high temperature corrosion and slagging scorification, it is characterized in that on described body of heater (1), being equipped with four smoke components on-line samplers (6).
7. according to claim 1, the 2 or 3 described boiler plants that prevent the burner wall formula layout of water wall high temperature corrosion and slagging scorification, it is characterized in that on airduct (5), being provided with speed measuring device (5-2).
8. according to claim 1, the 2 or 3 described boiler plants that prevent the burner wall formula layout of water wall high temperature corrosion and slagging scorification, an end that it is characterized in that described airduct (5) is communicated with adherent wind bellows (4), and the other end of airduct (5) is arranged in the secondary air duct (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100097722A CN1308615C (en) | 2005-02-28 | 2005-02-28 | Boiler device with wall fitted burner for preventing water-cooled wall corroded by high-temp and slagging scorification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100097722A CN1308615C (en) | 2005-02-28 | 2005-02-28 | Boiler device with wall fitted burner for preventing water-cooled wall corroded by high-temp and slagging scorification |
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| Publication Number | Publication Date |
|---|---|
| CN1657825A CN1657825A (en) | 2005-08-24 |
| CN1308615C true CN1308615C (en) | 2007-04-04 |
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| CNB2005100097722A Expired - Fee Related CN1308615C (en) | 2005-02-28 | 2005-02-28 | Boiler device with wall fitted burner for preventing water-cooled wall corroded by high-temp and slagging scorification |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464118C (en) * | 2007-02-28 | 2009-02-25 | 哈尔滨工业大学 | High temperature-and corrosion-protectal low NOx vortex burning device |
| CN101280919B (en) * | 2008-05-07 | 2011-05-11 | 东方锅炉（集团）股份有限公司 | Forward and backward wall opposite rushing combustion boiler hearth as well as method for arranging air nozzle on side wall |
| CN102777880B (en) * | 2012-07-19 | 2014-10-01 | 国网浙江省电力公司电力科学研究院 | Adjustable hot air device preventing high-temperature corrosion of power station boiler |
| CN102829482B (en) * | 2012-09-27 | 2016-02-17 | 河南省电力公司电力科学研究院 | The adherent wind adding set of a kind of Opposite Firing Boiler side wall |
| CN103438438B (en) * | 2013-08-26 | 2016-08-10 | 中节环立为（武汉）能源技术有限公司 | Memberane wall type boiler high temperature corrosion resistance method for coke and device thereof |
| CN103912893B (en) * | 2014-04-15 | 2016-04-27 | 太原理工大学 | The boiler water wall protective device of anti-coking high temperature corrosion resistance |
| CN106196021A (en) * | 2016-08-30 | 2016-12-07 | 西安热工研究院有限公司 | A kind of boiler water wall antisepsis protector |
| CN107747731B (en) * | 2017-09-21 | 2019-08-02 | 湘潭大学 | A kind of adherent wind apparatus preventing boiler water-cooling wall high-temperature corrosion |
| CN110081418B (en) * | 2019-05-15 | 2024-05-10 | 河南省锅炉压力容器安全检测研究院 | Front and rear wall opposite-flow combustion boiler side wall anti-sulfuration corrosion adherence wind shower nozzle |
| CN110715288A (en) * | 2019-11-19 | 2020-01-21 | 哈尔滨龙高科环境科技有限公司 | Wall-attached air system for coal-fired boiler with four tangential corners |
| CN113776047B (en) * | 2021-09-30 | 2022-08-26 | 哈尔滨工业大学 | Device for preventing high-temperature corrosion of water-cooled wall of combustion boiler and boiler corrosion prevention method |
| CN113803715A (en) * | 2021-10-28 | 2021-12-17 | 西安热工研究院有限公司 | System for solving problem of slag bonding of surrounding water-cooled wall of cyclone burner |
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|---|---|---|---|---|
| US4257357A (en) * | 1978-01-16 | 1981-03-24 | Foster Wheeler Energy Corporation | Furnaces |
| CN1032071A (en) * | 1987-09-16 | 1989-03-29 | 江西进贤锅炉厂 | Sectional combustion boiling boiler and combustion method thereof |
| DE3806044A1 (en) * | 1988-02-26 | 1989-08-31 | Steinmueller Gmbh L & C | Furnace wall |
| JPH0791601A (en) * | 1993-09-22 | 1995-04-04 | Miura Co Ltd | Water-tube boiler |
| CN2532369Y (en) * | 2002-04-12 | 2003-01-22 | 山东中实股份有限公司 | High-temp. corrosion-resistant coal powder straight flow combustion device |
-
2005
- 2005-02-28 CN CNB2005100097722A patent/CN1308615C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4257357A (en) * | 1978-01-16 | 1981-03-24 | Foster Wheeler Energy Corporation | Furnaces |
| CN1032071A (en) * | 1987-09-16 | 1989-03-29 | 江西进贤锅炉厂 | Sectional combustion boiling boiler and combustion method thereof |
| DE3806044A1 (en) * | 1988-02-26 | 1989-08-31 | Steinmueller Gmbh L & C | Furnace wall |
| JPH0791601A (en) * | 1993-09-22 | 1995-04-04 | Miura Co Ltd | Water-tube boiler |
| CN2532369Y (en) * | 2002-04-12 | 2003-01-22 | 山东中实股份有限公司 | High-temp. corrosion-resistant coal powder straight flow combustion device |
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| CN1657825A (en) | 2005-08-24 |
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