CN103438437A - Adherence air system of front and back wall opposed firing boiler - Google Patents

Adherence air system of front and back wall opposed firing boiler Download PDF

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Publication number
CN103438437A
CN103438437A CN2013103249045A CN201310324904A CN103438437A CN 103438437 A CN103438437 A CN 103438437A CN 2013103249045 A CN2013103249045 A CN 2013103249045A CN 201310324904 A CN201310324904 A CN 201310324904A CN 103438437 A CN103438437 A CN 103438437A
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air
adherent wind
water
wind
adherent
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CN103438437B (en
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刘建民
黄启龙
戴维葆
陈国庆
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Guodian Science and Technology Research Institute Co Ltd
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Guodian Science and Technology Research Institute Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The invention provides an adherence air system of a front and back wall opposed firing boiler, which comprises air supply source devices and adherence air nozzles which are connected by adherence air channels sequentially, wherein the adherence air nozzles are arranged on the edges of a front wall and a back wall of the opposed firing boiler; the air supply source devices comprise high-pressure air sources, and primary air fans and air preheaters which are connected in series; the air preheaters are connected in parallel with the high-pressure air sources; and each adherence air nozzle comprises a housing and a pair of straightening vanes which are movably connected by rotating shafts. The adherence air system is simple in structure, and convenient to implement; the adherence air system is arranged on the edges of the front wall and the back wall, so that adherence air can flow in parallel to a water-cooled wall of a side wall; the high-pressure air sources and the specific nozzles are adopted, so that the penetration depth of the adherence air can be ensured; the water-cooled wall is prevented from being scoured and abraded; and coking and high temperature corrosion of the water-cooled wall are avoided effectively.

Description

A kind of adherent wind system of Opposite Firing Boiler
Technical field
The invention belongs to the steam power plant field, relate to a kind of adherent wind system that can effectively prevent the coking of Opposite Firing Boiler water-cooling wall and high temperature corrosion.
Background technology
Opposite Firing Boiler is because of the advantage of its combustion apparatus and heating surface layout aspect, become one of domestic overcritical and combustion apparatus that ultra-supercritical boiler mainly adopts, in in-service fired power generating unit, is widely used at home., economy efficient in order to realize, environmental protection operation, such type of furnace adopts the mode of Researched of Air Staging Combustion Burning Pulverized Coal to control NO usually xdischarge.So-called Researched of Air Staging Combustion Burning Pulverized Coal is sent the classification of fuel combustion required air into burner hearth exactly.The Researched of Air Staging Combustion Burning Pulverized Coal boiler generally includes primary zone, reducing zone and burning-out zone three parts.In primary zone, the burner region, feed 70~90% of fuel combustion Air Quantity Required, and fuel burns under anoxia condition, not only can control thermal NO xgeneration, can also reduce part of fuel type NO x; Between primary zone and burning-out zone, be the reducing zone that oxygen concentration is extremely low, the NO that primary zone generates xat this section by CxHy, CO, coal tar and H 2be reduced to N Deng reducing substances 2; At the burning-out zone of distance top layer burner top certain distance, feed the required remaining air of complete combustion of fuel, the completing combustion under this zone excess oxygen of the unburnt coke in primary zone and gas component.Can make NO by Researched of Air Staging Combustion Burning Pulverized Coal xreducing exhaust emission 30%~50%.
Yet, although in stove, the formation of strong reducing zone can reduce NO xdischarge, but the problem of serving row also to the safe operation band of boiler.At first, contain a large amount of severe corrosive gas in the gas of reducing zone, as H 2s, SO 2deng; These gases very easily destroy the iron oxide diaphragm on water-cooling wall surface under certain condition, thereby cause water-cooling wall serious sulfate and sulfide type high temperature corrosion to occur.Secondly, along with the furnace atmosphere reproducibility strengthens, the ash fusion point of coal is by decrease, and this not only can cause this zone water-cooling wall Serious Slagging, but also can accelerate the high temperature corrosion of heating surface.In addition, along with NO xthe raising day by day of emission request, power plant is in order further to reduce NO xdischarge capacity, constantly strengthen the degree of air classification, reduces primary zone and reducing zone oxygen amount, strengthens the ratio of after-flame wind, this way make the water-cooling wall slagging scorification and High Temperature Corrosion more outstanding.How to guarantee the low NO of Opposite Firing Boiler xin the time of discharge, guarantee that high temperature corrosion and slagging scorification do not occur furnace wall cooling, become such boiler problem demanding prompt solution.
At present, for opposed firing boiler water-cooling wall high-temperature corrosion and slagging scorification problem, measure and the method for some solutions appearred.Wherein, in rationalization's burner hearth, aerodynamic field, increase water-cooling wall zone oxygen amount, be to solve opposed firing boiler water wall slagging scorification and the most economical mode of High Temperature Corrosion.But, research is found, on the forward and backward wall that is arranged in burner hearth due to burner and the after-flame wind snout of Opposite Firing Boiler, all do not arrange any air supply device on both walls, by optimizing and revising of Furnace Aerodynamic Field, the slagging scorification of front-back wall water-cooling wall and High Temperature Corrosion be can only solve, the slagging scorification of both walls water-cooling wall and High Temperature Corrosion are difficult to solve.
In order to solve side water wall high temperature corrosion and slagging scorification problem, colleges and universities, DianKeYuan and boiler producer have also proposed many measures both at home and abroad.Chinese patent 200520020312.5 discloses a kind of boiler plant that prevents the burner wall formula layout of water wall high temperature corrosion and slagging scorification, point out boiler primary zone side water wall fin is taken off and forms the gap spout, by the part Secondary Air, from then on spray in burner hearth, thereby realize to the anticlogging purpose of side water wall zone oxygenating, but owing to not arranging adherent wind passage in gap, Secondary Air directly sprays into burner hearth through gap perpendicular to water-cooling wall, can not form adherent air curtain.In addition, this gap only is arranged in primary zone, can't suppress high temperature corrosion and the slagging scorification problem of reducing zone between the superiors' burner and after-flame wind snout.In addition, take off the gap size too small (general 6~7mm) that fin forms, resistance is large, sprays into the air-flow poor rigidity of burner hearth, also very easily by primary air, is entrainmented, and is difficult to form stable adherent wind.
For the air-flow that makes to spray in burner hearth flows along wall, Chinese patent 200810044352.1 discloses a kind of Opposite Firing Boiler burner hearth and the method for air nozzle has been set on side wall, proposition is sent into burner hearth by the part Secondary Air by the outward turning flow and inner direct flow nozzle be arranged on side wall, thereby, when realizing the oxygenating of burner hearth center, form and paste the adherent wind that sidewall flows.But because eddy flow spout resistance is large, when air quantity hour, the eddy flow effect is poor, the swirling eddy sprayed in stove is very easily entrainmented by air-flow, causes wall zone oxygenating deficiency, can not solve the problem of side wall high temperature corrosion and slagging scorification.When air quantity is larger, although swirl strength can strengthen, too early by a large amount of oxygen supplies in burner hearth, destroyed the original intention of Researched of Air Staging Combustion Burning Pulverized Coal, be unfavorable for reducing NO xdischarge capacity.
Chinese patent 201210577062.X discloses a kind of adherent wind segmentation and has sent into furnace binding, Chinese patent 201210373292.4 discloses the adherent wind adding set of a kind of Opposite Firing Boiler side wall, all propose to pass through at side water wall installed inside baffle plate and nozzle, thereby make Secondary Air flow and form stable adherent wind along water-cooling wall.Though this mode can solve the problem of adherent wind along the water-cooling wall PARALLEL FLOW, but can bring impact to safe operation of the boiler at water-cooling wall installed inside inner member.In addition, adopt baffle plate directly Secondary Air to be stopped and flows to water-cooling wall, can cause the wearing and tearing of water-cooling wall.
Comprehensive above the analysis,, for Opposite Firing Boiler water wall high temperature corrosion and slagging scorification way to solve the problem, mainly there is the problem of following several respects in prior art:
(1) adherent wind rigidity deficiency
The adherent wind overwhelming majority who uses in prior art is usingd Secondary Air as wind regime, and in station boiler, the Secondary Air blast is lower, as adherent wind, directly sprays into burner hearth, because pressure is low, rigidity is not enough, can sneak into early primary zone, destroy reducing zone atmosphere, be unfavorable for that fractional combustion reduces NO x; In addition, the rigidity deficiency of air-flow also can cause the adherent wind distance extremely short at the distance spout interiorly to depart from water-cooling wall, thereby affects the effective coverage range of adherent wind.
(2) adherent wind erosive wear water-cooling wall
In the adherent wind arrangement that prior art adopts, or the distance between adherent wind and water-cooling wall is too near, otherwise by baffle plate directly by adherent windage baffle to water-cooling wall, can cause thus adherent wind directly to wash away water-cooling wall.Leak owing to containing flue gas in Secondary Air the flying dust of coming, directly wash away water-cooling wall and can cause the water-cooling wall wearing and tearing, cause booster, affect safe operation of the boiler.
(3) inner member serious wear and affect boiler operatiopn
Be parallel to water-cooling wall and flow in order to make to spray into adherent wind in stove, prior art adopt at side water wall installed inside guiding device, although this kind of mode can guarantee that adherent wind is adherent mobile, but because inner member protrudes water-cooling wall, not only make its serious wear, but also cause this position easily to hang the close-burning slag, affect safe operation of the boiler.
In sum, for Opposite Firing Boiler water wall high temperature corrosion and slagging scorification problem, more existing solutions and method all have some limitations, and in application process, can't fundamentally address this problem.How in assurance, to eliminate under the reducibility gas condition in the adherent flue gas of water-cooling wall, reduce as much as possible adherent wind air quantity, do not affect the burning at burner hearth center, do not destroy the reducing atmosphere at burner hearth center, erosive wear water-cooling wall surface not, be to solve opposed firing boiler water wall slagging scorification and high temperature corrosion, realize low NO xthe basic principle of discharge.
Summary of the invention
Goal of the invention: the purpose of this invention is to provide a kind of adherent wind system that can effectively prevent the coking of Opposite Firing Boiler water-cooling wall and high temperature corrosion.
Technical scheme: the adherent wind system of a kind of Opposite Firing Boiler provided by the invention, comprise the air source apparatus (2) and the adherent wind nozzle (51) that connect successively by adherent wind air channel (52), described adherent wind nozzle (51) is located at the edge of front wall (11) and the rear wall (12) of face-fired boiler.
The adherent wind of Opposite Firing Boiler is arranged on front wall and rear wall, can guarantee to realize that adherent wind is parallel to side water wall and flows under burner hearth inside does not add the prerequisite of inner member, thereby efficiently solving adherent wind is arranged in the side wall air-flow and is difficult to be parallel to the mobile problem of water-cooling wall, can effectively increase the nearly surperficial oxygen concentration of water-cooling wall, weaken the destruction to burner hearth center reducing atmosphere, greatly reduce the risk of water-cooling wall coking and high temperature corrosion.
As improvement, described air source apparatus (2) comprises primary air fan (23), the air preheater (21) of high-pressure air source (22) and series connection, and described air preheater (21) and high-pressure air source (22) are arranged in parallel; According to service condition and go out wind pressure, the wind regime of adherent wind system 5 has multiple choices: the heat primary air of air preheater 21, or the air-out of high-pressure air source 22, or the mixing of the air-out of the heat primary air of air preheater 21 and high-pressure air source 22; Thereby guarantee that adherent wind snout air-flow has larger rigidity, guarantee its penetration depth along water-cooling wall, realize covering with a small amount of wind the purpose in large as far as possible zone.In addition, adopt heat primary air as adherent wind regime, can reduce air preheater outlet exhaust gas temperature, improve boiler efficiency.
As another kind, improve, described adherent wind nozzle (51) comprises housing (511) and a pair of straightener(stator) blade (512) be flexibly connected by turning cylinder (513); Employing is with the adherent wind nozzle of adjustable straightener(stator) blade, by regulating the pivot angle of adherent wind nozzle interior straightener(stator) blade, can change the width in jet expansion gap, realization to adherent wind along the water-cooling wall penetration depth and and water-cooling wall between the adjusting of distance, wash away water-cooling wall and the limited problem of penetration depth thereby effectively solve adherent wind.
As another kind, improve, described straightener(stator) blade (512) is 50-100mm apart from housing (511) distance from bottom; Such structure can guarantee top seal on the one hand, leaves enough spaces in its bottom on the other hand, thereby can make flying dust discharge with air-flow, in case the flying dust blocking blades.
As another kind, improve, described adherent wind air channel (52) is provided with flow measurement device and control valve.
Improve as another kind, also comprise one group of O 2/ CO apparatus for measuring concentration (8), O 2/ CO apparatus for measuring concentration (8) is located at the middle part of left side wall (13) and the middle part of right-side wall (14).
Beneficial effect: the adherent wind system of Opposite Firing Boiler provided by the invention is simple in structure, enforcement is convenient, by adherent wind system being arranged to the edge of front wall and rear wall, can make adherent wind be parallel to the sidewall water-cooling wall flows, by adopting high-pressure air source and specific nozzle, can guarantee adherent wind penetration depth, prevent the erosive wear water-cooling wall, thereby effectively prevent the problem of water-cooling wall coking and high temperature corrosion.
Particularly, the present invention, with respect to prior art, has following outstanding advantage:
(1) the present invention adopts first the adherent wind of Opposite Firing Boiler is arranged on front wall and rear wall, can guarantee to realize that adherent wind is parallel to side water wall and flows under burner hearth inside does not add the prerequisite of inner member, thereby efficiently solve adherent wind, be arranged in the problem that the side wall air-flow is parallel to the water-cooling wall Flowing Hard.
(2) the present invention proposes to adopt air preheater outlet heat primary air and the pressure-air source of the gas as the adherent wind of Opposite Firing Boiler first, increased the rigidity of adherent wind, improve its penetration depth along water-cooling wall, thereby realized covering with a small amount of wind the purpose in large as far as possible zone.In addition, adopt heat primary air as adherent wind regime, can reduce air preheater outlet exhaust gas temperature, improve boiler efficiency.
(3) the present invention propose first to adopt with the adherent wind penetration depth of adherent wind cut-out governing of adjustable straightener(stator) blade and and water-cooling wall between distance, by regulating the pivot angle of adherent wind nozzle interior straightener(stator) blade, can change the width in jet expansion gap, realization to adherent wind along the water-cooling wall penetration depth and and water-cooling wall between the adjusting of distance, wash away water-cooling wall and the limited problem of penetration depth thereby effectively solve adherent wind.
The accompanying drawing explanation
Fig. 1 is the structural representation of Opposite Firing Boiler;
Fig. 2 is the vertical section structure schematic diagram of Opposite Firing Boiler;
Fig. 3 is the horizontal cross-section structural representation of Opposite Firing Boiler;
Fig. 4 is the vertical section structure schematic diagram of adherent wind nozzle;
Fig. 5 is the horizontal cross-section structure chart of adherent wind nozzle;
Fig. 6 is a kind of mounting means schematic diagram of adherent wind nozzle;
Fig. 7 is the another kind of mounting means schematic diagram of adherent wind nozzle.
The specific embodiment
Below in conjunction with accompanying drawing, the adherent wind system of Opposite Firing Boiler of the present invention is made and being further illustrated.
Opposite Firing Boiler, comprise adherent wind system 5 of the present invention, sees Fig. 1 to Fig. 3, comprises burner hearth 1, secondary air system 3, after-flame wind system 4, the adherent wind system 5 that comprises air source apparatus 2, burner 6, furnace hopper 7, CO/O 2measurement mechanism 8.
Secondary air system 3, after-flame wind system 4, adherent wind system 5 all are connected with air source apparatus 2; Burner 6 is located in secondary air system 3, every row 4-6; Furnace hopper 7 is located at burner hearth 1 bottom.The middle part of left side wall 13 and the middle part of right-side wall 14 are equipped with one group of O 2/ CO apparatus for measuring concentration 8.
Burner hearth 1 comprises front wall 11, rear wall 12, left side wall 13 and right-side wall 14; The front wall 11 of burner hearth 1, rear wall 12, left side wall 13 and right-side wall 14 are by close-connected water screen tube 15 and be located at fin 16 compositions on water screen tube.
The front wall 11 of burner hearth 1 is relative with the lower outside of rear wall 12 to be provided with and the interior secondary air system be communicated with 3 of burner hearth 1; Secondary air system 3 comprises secondary air register 31 and the secondary air chamber 32 connected successively.In the present invention, the quantity of secondary air chamber 32 is 3, and alternatively, its quantity also can rationally arrange as required, preferably 1 to 5.
The front wall 11 of burner hearth 1 be provided with after-flame wind system 4 relative to the top of rear wall 12, and with secondary air system 3 setting that keeps at a certain distance away; After-flame wind system 4 comprises after-flame wind snout 43 and the after-flame wind air door 41 and the after-flame wind air compartment 42 that connect successively, and after-flame wind snout 43 is located in after-flame wind air compartment 42.
The front wall 11 of burner hearth 1 is relative with rear wall 12 edges is provided with adherent wind system 5; Adherent wind system 5, be shown in Fig. 4 to 5, comprises the air source apparatus 2 and the adherent wind nozzle 51 that connect by adherent wind air channel 52, and adherent wind air channel 52 is provided with flow measurement device and control valve; Adherent wind nozzle 51 comprises housing 511 and a pair of straightener(stator) blade 512 be flexibly connected by turning cylinder 513; Straightener(stator) blade 512 is 75mm apart from housing 511 distances from bottom, and alternatively, its distance also can rationally arrange as required, preferably 50-100mm.
Air source apparatus 2 can be only air preheater 21, also can comprise air preheater in parallel 21 and high-pressure air source 22; Heat primary air is connected with the pressure-air source of the gas, can effectively solve the adherent wind reduced stiffness that heat primary air air quantity or insufficient pressure cause, and affects the adherent wind problem limited along the water-cooling wall penetration depth.
Adherent wind nozzle 51 has multiple feasible mode at front wall 11 and arrangement on rear wall 12 according to the set-up mode of water screen tube 15 is different, below provides two kinds of typical modes:
One, be shown in Fig. 6, and when water screen tube is arranged vertically, the arrangement on the water-cooling wall that adherent wind nozzle 51 forms at water screen tube 15 is that the fin 16 vertical with rear wall 12 with front wall 11 taken off, and then the left and right sides post-tensioning, form square cavity, then spout put into.The height of adherent wind nozzle 51 can be identical with the height of secondary air chamber 32, after-flame wind air compartment 42.
Its two, see Fig. 7, during the water screen tube screw arrangement, on the water-cooling wall that adherent wind nozzle 51 forms at water screen tube 15, arrangement is that the fin 16 of front wall 11 and rear wall 12 is taken off, then the upper and lower sides post-tensioning, put into spout.Adherent wind nozzle 51 is highly less, the area that adherent wind covers is limited, in order to make up this shortcoming, at secondary air chamber 32, after-flame wind air compartment 42, along arranging a plurality of nozzles on short transverse, the quantity of secondary air chamber 32, after-flame wind air compartment 42 interior adherent wind nozzles 51 can be determined according to the distribution characteristics of water-cooling wall wall zone atmosphere.
During use, air preheater 21 is provided with heat primary air outlet, the outlet of hot Secondary Air, and the Secondary Air of hot Secondary Air outlet passes into secondary air system 3 and after-flame wind system 4, sprays into burner hearth; Heat primary air is divided into two parts, and a part passes into the coal pulverizer drying, carry coal dust enters burner, and another part, as one of adherent wind wind regime, by adherent wind air channel, enters adherent wind nozzle.According to service condition and go out wind pressure, the wind regime of adherent wind system 5 has multiple choices: the heat primary air of air preheater 21 outlets, mixing of the pressure-air of the heat primary air of the perhaps pressure-air of high-pressure air source 22, or air preheater 21 and high-pressure air source 22; By the valve controlling flow amount on each pipeline, secondary air system 3 is in burner hearth 1 formation primary zone, bottom, and fuel burns under anoxia condition, not only can control thermal NO xgeneration, can also reduce part of fuel type NO x; Combustion product rises to the NO of Nei, primary zone, the reducing zone generation formed between secondary air system 3 and after-flame wind system 4 xat this section by C xh y, CO, coal tar and H 2be reduced to N Deng reducing substances 2; Product rises in the burning-out zone of after-flame wind system 4 formation, feeds the required remaining air of complete combustion of fuel, the completing combustion under this zone excess oxygen of the unburnt coke in primary zone and gas component.Be equipped with adherent wind system 5 in primary zone, reducing zone, burning-out zone, according to CO and O 2the value that flow measurement device records, adjust the flow of the adherent wind of adherent wind nozzle 51, prevention Opposite Firing Boiler water-cooling wall coking and high temperature corrosion.

Claims (6)

1. the adherent wind system of an Opposite Firing Boiler, it is characterized in that: described adherent wind system (5) comprises air source apparatus (2) and the adherent wind nozzle (51) connected successively by adherent wind air channel (52), and described adherent wind nozzle (51) is located at the edge of front wall (11) and the rear wall (12) of face-fired boiler.
2. the adherent wind system of a kind of Opposite Firing Boiler according to claim 1, it is characterized in that: described air source apparatus (2) comprises primary air fan (23), the air preheater (21) of high-pressure air source (22) and series connection, and described air preheater (21) and high-pressure air source (22) are arranged in parallel.
3. the adherent wind system of a kind of Opposite Firing Boiler according to claim 1 is characterized in that: described adherent wind nozzle (51) comprises housing (511) and a pair of straightener(stator) blade (512) be flexibly connected by turning cylinder (513).
4. the adherent wind system of a kind of Opposite Firing Boiler according to claim 1, it is characterized in that: described straightener(stator) blade (512) is 50-100mm apart from housing (511) distance from bottom.
5. the adherent wind system of a kind of Opposite Firing Boiler according to claim 1, it is characterized in that: described adherent wind air channel (52) is provided with flow measurement device and control valve.
6. the adherent wind system of a kind of Opposite Firing Boiler according to claim 1, is characterized in that: also comprise one group of O 2/ CO apparatus for measuring concentration (8), O 2/ CO apparatus for measuring concentration (8) is located at the middle part of left side wall (13) of Opposite Firing Boiler and the middle part of right-side wall (14).
CN201310324904.5A 2013-07-30 2013-07-30 A kind of adherent wind system of Opposite Firing Boiler Active CN103438437B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103912887A (en) * 2014-03-20 2014-07-09 华中科技大学 Method and device for preventing thermal-power boiler from quick coking and ash deposition
CN104456538A (en) * 2014-11-21 2015-03-25 国家电网公司 Device and method for retarding high-temperature corrosion on rotational flow opposed combustion boiler water wall
CN104595891A (en) * 2015-01-21 2015-05-06 西安热工研究院有限公司 Opposed firing structure of boiler
CN105650626A (en) * 2016-03-25 2016-06-08 烟台龙源电力技术股份有限公司 Front and back wall opposed firing boiler
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

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CN202993178U (en) * 2012-11-29 2013-06-12 华南理工大学 Near-wall wind device used for avoiding high temperature corrosion of water cooling wall of waste burning boiler
CN203454111U (en) * 2013-07-30 2014-02-26 国电科学技术研究院 Novel near-wall air device for front and rear wall opposed firing boiler

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Publication number Priority date Publication date Assignee Title
EP1435485A1 (en) * 2002-12-26 2004-07-07 Hitachi Ltd. Solid fuel boiler and method of operating combustion apparatus
CN202132972U (en) * 2011-06-07 2012-02-01 上海锅炉厂有限公司 Wall-adjoined wind nozzle distribution structure for W type flame boiler
CN102563687A (en) * 2012-03-07 2012-07-11 上海锅炉厂有限公司 Oxygen-enriched combustion system
CN102721043A (en) * 2012-07-10 2012-10-10 烟台龙源电力技术股份有限公司 Pulverized coal fired boiler with wall-attachment secondary air and grid burning-out air
CN202993178U (en) * 2012-11-29 2013-06-12 华南理工大学 Near-wall wind device used for avoiding high temperature corrosion of water cooling wall of waste burning boiler
CN203454111U (en) * 2013-07-30 2014-02-26 国电科学技术研究院 Novel near-wall air device for front and rear wall opposed firing boiler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103912887A (en) * 2014-03-20 2014-07-09 华中科技大学 Method and device for preventing thermal-power boiler from quick coking and ash deposition
CN104456538A (en) * 2014-11-21 2015-03-25 国家电网公司 Device and method for retarding high-temperature corrosion on rotational flow opposed combustion boiler water wall
CN104595891A (en) * 2015-01-21 2015-05-06 西安热工研究院有限公司 Opposed firing structure of boiler
CN105650626A (en) * 2016-03-25 2016-06-08 烟台龙源电力技术股份有限公司 Front and back wall opposed firing boiler
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

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