CN112377894A - Wind tangent circle pulverized coal combustion boiler - Google Patents
Wind tangent circle pulverized coal combustion boiler Download PDFInfo
- Publication number
- CN112377894A CN112377894A CN202011376840.XA CN202011376840A CN112377894A CN 112377894 A CN112377894 A CN 112377894A CN 202011376840 A CN202011376840 A CN 202011376840A CN 112377894 A CN112377894 A CN 112377894A
- Authority
- CN
- China
- Prior art keywords
- pulverized coal
- wind
- air supply
- hearth
- bottom air
- 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.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L1/00—Passages or apertures for delivering primary air for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/06—Regulating fuel supply conjointly with draught
- F23N1/067—Regulating fuel supply conjointly with draught using mechanical means
Abstract
The invention discloses a wind tangent circle pulverized coal combustion boiler which comprises a hearth burnout zone, a hearth main combustion zone and an ash bucket, wherein the hearth burnout zone, the hearth main combustion zone and the ash bucket are sequentially arranged from top to bottom, the hearth main combustion zone is provided with pulverized coal nozzles and combustion-supporting air nozzles, the upper part of the ash bucket is provided with a bottom air supply nozzle, and the bottom air supply nozzle is positioned at the lower side of the hearth main combustion zone to supply air to a hearth. To the air feed body of bottom air feed spout confession income, oxygen content can effectively solve the main district downside oxygen content problem that probably is not enough of furnace in the air body, can order to order about more share simultaneously and be located the buggy of furnace bottom and move up and effectively hold the chamber with make full use of furnace and burn, improves the burn-off rate of lower floor's combustor buggy to improve the holistic combustion efficiency of boiler, promote power station efficiency level. In conclusion, the wind tangent circle pulverized coal combustion boiler effectively solves the problems that pulverized coal in a hearth of the existing wind tangent circle pulverized coal combustion boiler is not completely combusted, the carbon content of ash is higher and the like.
Description
Technical Field
The invention relates to the technical field of boilers, in particular to a wind-tangential pulverized coal combustion boiler.
Background
Coal combustion power generation is a main power source in China, and a tangential firing pulverized coal boiler is widely adopted in a power station generator set as a main boiler form. The tangent circle burning pulverized coal boiler mainly has forms such as wall type tangent circle and four corners tangent circle, wall type tangent circle boiler and four corners tangent circle boiler's structure is similar, the leading features is, constitute a set of combustion unit with a plurality of combustors and each wind gap that single column distributes from top to bottom, evenly arrange at four sides wall body or four corners of boiler by the above-mentioned single column combustion unit of multiunit, each combustor and each wind gap pour into buggy and hot-blast according to certain angle into to the furnace middle part according to actual need, hot-blast coal that carries takes place the intensification of buggy in furnace, catch fire, burn out process such as the end, produce a large amount of heats hot water and produces high-quality steam from this, and then promote turbine unit and generating set and generate electricity. The pulverized coal-containing airflow ejected by the burners at each corner or wall of the tangential firing boiler can be ignited by the high-temperature flue gas blown from the upstream, the downstream burners are further promoted to fire, and meanwhile, the fired pulverized coal can be in mutual entrainment and full contact with secondary air, so that the pulverized coal is favorably burnt out. The rotary ascending air flow generated by the tangential firing boiler also prolongs the retention time of the pulverized coal in the boiler, and is beneficial to the burnout of the pulverized coal to a certain extent. The burner wind powder spraying mode adopted by the existing tangential firing pulverized coal boiler has two modes of direct current jet flow and rotational flow jet flow, the jet flow of the direct current burner has longer range, is favorable for penetrating through a hearth, can strengthen the mutual promotion effect of firing and burning out at the upstream and the downstream, and is favorable for improving the combustion efficiency, so that the direct current pulverized coal burner is more widely applied to single four-corner tangential firing.
Through long-term research, the inventor finds that although the pulverized coal sprayed by the lower-layer combustor has longer retention time, due to the existence of air classification, the oxygen supply condition at the bottom of the hearth is very poor, so that the burnout effect of the pulverized coal is weakened, meanwhile, the temperature at the bottom of the hearth is lower than that at the middle upper part of the hearth, and the release and ignition of volatile components of the pulverized coal are not facilitated. In addition, air classification makes the amount of wind blown into the bottom nozzle of the hearth insufficient, so that the lifting force of the coal powder sprayed by the lower-layer combustor in the height direction is insufficient, and a large amount of unburned coal powder is deposited on the bottom of the furnace to form ash residues.
In summary, how to effectively solve the problems of incomplete combustion of coal dust, high carbon content of ash and slag and the like in the hearth of the existing wind tangential circle coal dust combustion boiler is a problem which needs to be solved urgently by a person skilled in the art at present.
Disclosure of Invention
In view of the above, the present invention provides a wind tangential circle pulverized coal fired boiler, which can effectively solve the problems of incomplete combustion of pulverized coal, high carbon content of ash, etc. in the furnace of the current wind tangential circle pulverized coal fired boiler.
The utility model provides a wind circle of contact pulverized coal fired boiler, includes from last furnace burnout zone, the main burning zone of furnace and the ash bucket that sets gradually extremely down, the main burning zone of furnace is provided with buggy spout, combustion-supporting wind spout, the upper portion of ash bucket is provided with bottom air feed spout, bottom air feed spout is located the main burning zone downside of furnace is in order to supply the wind body in to furnace.
In this wind circle of contact buggy fires boiler, when using, to the bottom air feed nozzle supplies the wind body, and oxygen content can effectively solve the probably not enough problem of furnace owner combustion area downside oxygen content in the wind body to the problem of avoiding furnace owner combustion area downside burning not to the utmost that can be better, make full use of furnace bottom holds the chamber promptly and burns. And because the air supply device is arranged on the upper part of the ash bucket, the air entering from the bottom air supply nozzle can move upwards, the upwards moving air body forms the effect of integrally supporting the fluid inside the hearth from the main combustion area of the hearth, the descending speed of the internal coal powder is well delayed, more coal powder positioned at the bottom of the hearth can be driven to move upwards, the coal powder in the main combustion area of the hearth can be better combusted, and the ash residue amount at the bottom of the hearth is greatly reduced. The effective chamber of make full use of furnace burns, improves the burnout rate of lower floor's combustor buggy to improve the holistic combustion efficiency of boiler, promote the power station efficiency level. In conclusion, the wind tangent circle pulverized coal combustion boiler effectively solves the problems that pulverized coal in a hearth of the existing wind tangent circle pulverized coal combustion boiler is not completely combusted, the carbon content of ash is higher and the like.
Preferably, the air supply device is included and used for supplying hot air with the temperature of 250-350 ℃ to the bottom air supply nozzle.
Preferably, the furnace burn-out area is provided with the burn-out air spout, the air feed device including be used for to the burn-out air passageway of burn-out air spout air feed, the burn-out air passageway have the subchannel with to bottom air feed spout supplies the body of intaking.
Preferably, at least one group of opposite two sides of the upper part of the ash bucket are provided with the bottom air supply nozzles.
Preferably, the ash bucket comprises a bucket part and a connection part, wherein the bucket part is located at the lower part and is gradually contracted from top to bottom in cross section, the connection part is located at the upper part and is vertically arranged on the peripheral side wall, and the peripheral side wall of the connection part is provided with the bottom air supply nozzles.
Preferably, the bottom air supply nozzles on the side walls around the joining part are distributed in a tangent circle, so that a vortex is formed in the middle of the inner side of the joining part.
Preferably, the bottom air supply nozzles are installed in the middle of the side wall of the joining part and are transversely arranged in an inclined manner relative to the side wall, so that the bottom air supply nozzles on the two opposite sides are transversely staggered.
Preferably, four to forty bottom air supply nozzles are arranged at the upper part of the ash bucket and are uniformly distributed on the wall surface of the peripheral side wall.
Preferably, the inner end of the bottom air supply nozzle is arranged in an upward inclined mode.
Preferably, the upward inclination angle of the inner end of the bottom air supply nozzle is not more than 45 degrees, and the wind speed of the overfire air of the bottom air supply nozzle is 40-80 m/s.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic perspective view of a wind-tangential pulverized coal fired boiler according to an embodiment of the present invention;
FIG. 2 is a schematic side view of a wind-tangential pulverized coal fired boiler according to an embodiment of the present invention;
FIG. 3 is a schematic view of an upwardly inclined structure of a bottom air supply nozzle provided in an embodiment of the present invention;
fig. 4 is a schematic diagram of a transverse inclined structure of the bottom air supply nozzle provided by the embodiment of the invention.
The drawings are numbered as follows:
the device comprises a furnace top 1, a furnace side wall 2, a furnace front wall 3, an over-fire air nozzle 4, a furnace over-fire area 5, a furnace main combustion area 6, a pulverized coal nozzle 7, a combustion-supporting air nozzle 8, a connecting part 9, a bottom air supply nozzle 10 and a bucket part 11.
Detailed Description
The embodiment of the invention discloses a wind tangent circle pulverized coal combustion boiler, which effectively solves the problems of incomplete combustion of pulverized coal, high carbon content of ash residues and the like in a hearth of the conventional wind tangent circle pulverized coal combustion boiler.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, fig. 1 is a schematic perspective view of a wind-tangential pulverized coal combustion boiler according to an embodiment of the present invention; FIG. 2 is a schematic side view of a wind-tangential pulverized coal fired boiler according to an embodiment of the present invention; FIG. 3 is a schematic view of an upwardly inclined structure of a bottom air supply nozzle provided in an embodiment of the present invention; fig. 4 is a schematic diagram of a transverse inclined structure of the bottom air supply nozzle provided by the embodiment of the invention.
In a specific embodiment, the embodiment provides a wind tangential circle pulverized coal fired boiler, and particularly, the wind tangential circle pulverized coal fired boiler comprises a hearth burnout zone 5, a hearth main combustion zone 6 and an ash bucket which are sequentially arranged from top to bottom. The upper side of the hearth burnout zone 5 is generally provided with a hearth front wall 3 and hearth side walls 2 positioned at the left side and the right side of the hearth front wall 3, one side opposite to the hearth front wall 3 is generally arranged in an open mode, and the upper edge of the hearth front wall 3 is provided with a furnace top 1.
The main combustion area 6 of the hearth is provided with pulverized coal nozzles 7 and combustion-supporting air nozzles 8, wherein the pulverized coal nozzles 7 are also called primary air nozzles, wherein the combustion-supporting air nozzles 8 are also called secondary air nozzles, in the main combustion area 6 of the hearth, a plurality of pulverized coal nozzles 7 and a plurality of combustion-supporting air nozzles 8 are generally arranged in sequence at intervals, and preferably, a plurality of pulverized coal nozzles 7 and a plurality of combustion-supporting air nozzles 8 are arranged in sequence at intervals along a vertical straight line. The pulverized coal nozzles 7 and the combustion-supporting air nozzles 8 can be distributed at four corners of the main combustion area 6 of the hearth at intervals respectively, or the pulverized coal nozzles 7 and the combustion-supporting air nozzles 8 can be distributed on the side walls of four sides of the main combustion area 6 of the hearth at intervals only or simultaneously. Wherein the coal powder nozzles 7 distributed on the periphery and the combustion-supporting air nozzles 8 distributed on the periphery form tangential circle distribution, namely, the inner ports are distributed in a staggered manner clockwise or anticlockwise, a rotating vortex is formed in the middle, and then an air tangential circle form is formed, and the specific tangential circle air distribution requirement can refer to the prior art. Wherein the hearth burnout zone 5 is generally provided with a plurality of burnout air nozzles 4 in a tangential form, wherein the burnout air nozzles 4 can be distributed on four corners of the hearth burnout zone 5 and/or four side walls of the hearth burnout zone 5. Specifically, the combustion form of the wind tangent circle pulverized coal combustion boiler is single tangent circle, double tangent circle and multi tangent circle combustion.
Wherein the upper part of the ash bucket is provided with a bottom air supply nozzle 10, wherein the bottom air supply nozzle 10 is positioned at the lower side of the main combustion area 6 of the hearth to supply air into the hearth. The number of the bottom air supply nozzles 10 can be set according to the requirement, and the introduced air body is generally the same as the combustion-supporting air body. Wherein bottom air feed spout 10 can set up as required in the concrete position that sets up on ash bucket upper portion to do not interfere ash bucket and store up grey as the standard, and preferred more is close to furnace owner combustion zone 6 better. And the size and shape of the bottom air supply nozzle 10 are preferably arranged corresponding to the size and shape of the combustion-supporting air nozzle 8.
In this wind circle of contact buggy fires boiler, when using, to the bottom air feed spout 10 supplies the wind body, and oxygen content can effectively solve the 6 downside oxygen content problem that probably is not enough in the main combustion area of furnace in the wind body to the problem of avoiding the 6 downside burning in the main combustion area of furnace that can be better not to the utmost, make full use of furnace bottom holds the chamber promptly and burns. And because the air supply device is arranged on the upper part of the ash bucket, the air entering from the bottom air supply nozzle 10 can move upwards, and the upwards moving air body has the effect of integrally supporting the fluid inside the hearth from the main combustion area 6 of the hearth, so that the descending speed of the internal coal powder is well delayed, more coal powder positioned at the bottom of the hearth can be driven to move upwards, the coal powder in the main combustion area 6 of the hearth can be better combusted, and the ash residue amount at the bottom of the hearth is greatly reduced. The effective chamber of make full use of furnace burns, improves the burnout rate of lower floor's combustor buggy to improve the holistic combustion efficiency of boiler, promote the power station efficiency level. In conclusion, the wind tangent circle pulverized coal combustion boiler effectively solves the problems that pulverized coal in a hearth of the existing wind tangent circle pulverized coal combustion boiler is not completely combusted, the carbon content of ash is higher and the like.
Further, considering that the temperature in the furnace is relatively high, if low-temperature air is introduced through the bottom air supply ports 10, the temperature at the bottom of the furnace may be suddenly lowered, and the content of nitrogen oxides may be very high. Based on this, it is preferable here that the air supply means for supplying air to the bottom air supply nozzle 10 is capable of supplying hot air having a temperature of 250 degrees centigrade (° c) to 350 degrees centigrade, and preferably a temperature of 300 degrees centigrade, to the bottom air supply nozzle 10. Therefore, the sudden increase of the nitrogen oxides caused by the overhigh temperature of the burnout zone 5 and the main burning zone 6 of the hearth can be effectively relieved, the generation amount of the nitrogen oxides is reduced, and the environment benefit is good.
Further, the air supply device may be an air supply device that supplies high-temperature air to the overfire air nozzle 4, wherein the overfire air is generally high-temperature air. That is, the air supply device comprises an overfire air channel for supplying air to the overfire air nozzle 4, at the moment, the overfire air channel is provided with sub-channels for supplying air to the bottom air supply nozzle 10, so as to control the total inlet air intake of the overfire air channel, namely, the air volume in the whole furnace cavity. Correspondingly, the air volume of the possibly over-fired air is insufficient, at the moment, a part of combustion-supporting air can be introduced, specifically, a combustion-supporting air channel for supplying air to the combustion-supporting air nozzle 8 is provided with a sub-channel for supplying a part of combustion-supporting air to the bottom air supply nozzle 10, in order to ensure the bottom air supply effect, the air volume entering through the bottom air supply nozzle 10 preferably accounts for 5-20% of the air inlet volume of the furnace chamber, wherein the total air inlet volume is the sum of the air inlet of the bottom air supply nozzle 10, the pulverized coal nozzle 7, the combustion-supporting air nozzle 8 and the over-fired air nozzle 4. The air rate of the over-fire air in the bottom air supply nozzle 10 can also be 5-20%
As described above, the bottom air supply nozzles 10 may be disposed on one side of the periphery of the upper portion of the ash bucket, but this may cause the air entering the bottom of the furnace chamber to form turbulent flow, which disturbs the internal air flow, and based on this, it is preferable that the bottom air supply nozzles 10 are disposed on at least one set of two opposite sides of the upper portion of the ash bucket, and certainly, the bottom air supply nozzles 10 may be disposed on two sets of opposite sides, that is, the peripheral side walls.
In order to avoid interference with ash storage of the ash bucket, the ash bucket preferably comprises a bucket part 11 which is positioned at the lower part and has a gradually-reduced cross section from top to bottom and a connecting part 9 which is positioned at the upper part and is vertically arranged on the peripheral side wall, wherein the bucket part 11 is the ash storage part, and the connecting part is arranged adjacent to the main combustion area 6 of the hearth so as to connect the bucket part 11 with the main combustion area 6 of the hearth. Wherein the lateral wall all around of joint portion 9 sets up vertically to make the cross section from last to not changing down, do not diminish promptly, also do not increase. At this time, the bottom air supply nozzles 10 may be disposed on the peripheral side walls of the joining portion 9.
Correspondingly, the bottom air supply nozzles 10 on the peripheral side wall of the joining part 9 can be distributed in a tangent circle so as to form a vortex in the middle of the inner side of the joining part, wherein the tangent circle distribution can refer to the tangent circle distribution of the combustion-supporting air nozzles 8. The bottom air supply nozzles 10 on the two opposite sides can be transversely staggered. Specifically, the bottom air supply nozzles 10 may be installed in the middle of the side wall of the joining portion 9 and may be transversely inclined with respect to the side wall, so that the bottom air supply nozzles 10 on opposite sides may be transversely staggered. The transverse inclined arrangement means that an included angle between the bottom air supply nozzle 10 and the transverse extending direction of the side wall is an acute angle, and is not arranged in a right angle. The bottom air supply nozzles 10 on the peripheral side walls can be all arranged in a clockwise and anticlockwise inclined mode. Wherein the tilt angle is preferably between-45 degrees and 45 degrees (°). And preferably the lateral tilt angle is adjustable. It should be noted that the bottom air supply nozzles 10 may also be installed at the corners of the periphery of the joint 9.
Specifically, four to forty bottom air supply nozzles 10 may be arranged on the upper portion of the ash bucket, and are uniformly distributed on the wall surface of the peripheral side wall, specifically, if three bottom air supply nozzles 10 are uniformly distributed on the side wall of each side, twelve air supply nozzles are arranged.
Further, in order to better lift the internal air and the pulverized coal, the inner end of the bottom air supply nozzle 10 is preferably arranged to be inclined upward, so that the air outlet direction from the inner end of the bottom air supply nozzle 10 is inclined upward. Specifically, it is preferable that the inner end of the bottom air supply nozzle 10 is inclined upward at an angle of not more than 45 degrees. And preferably the upward angle of inclination is adjustable. In order to ensure the lifting effect, the overfire air sprayed into the bottom air supply nozzle 10 preferably has certain rigidity, and the wind speed of the bottom air supply nozzle 10 is preferably 40-80 m/s (meters per second). Wherein the nozzle form of the bottom air supply nozzle 10 can be a direct current nozzle or a rotational flow nozzle.
A700 MW (megawatt) tangential firing pulverized coal boiler is characterized in that bottom air supply nozzles 10 are arranged in the middle of wall surfaces on the periphery of the upper portion of an ash bucket, three bottom air supply nozzles 10 are arranged on each wall surface, twelve bottom air supply nozzles 10 are arranged in total, and the air supply mode adopts direct current air supply. And supplying air to the bottom air supply nozzle 10 from the overfire air part sprayed into the upper part of the hearth overfire area 5, so that the air supply rate of the hearth is 5-20%. The bottom air supply nozzle 10 is of a structure with adjustable horizontal and vertical deflection angles, wherein the upward deflection angle alpha of the air supply nozzle and the wall surface in the vertical direction is 0-45 degrees, and the upward deflection angle of the bottom air supply nozzle 10 and the wall surface in the vertical direction enables bottom air to be blown into the center of the bottom of the hearth. The transverse deflection angle beta of the air supply nozzle and the side wall of the ash bucket is-45 degrees, and the deflection angle beta of the bottom air supply nozzle 10 and the vertical direction of the wall surface enables the bottom air supply nozzle to be matched with the rotational flow direction and the strength of the hearth.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a wind circle coal powder burning boiler, includes from last furnace burnout district, the main burning zone of furnace and the ash bucket that sets gradually extremely down, the main burning zone of furnace is provided with buggy spout, combustion-supporting wind spout, a serial communication port, the upper portion of ash bucket is provided with bottom air feed spout, bottom air feed spout is located the main burning zone downside of furnace is in order to supply the wind body in to furnace.
2. The wind-tangent circle pulverized coal combustion boiler as claimed in claim 1, comprising an air supply device for supplying hot air at a temperature of 250 to 350 ℃ to the bottom air supply nozzle.
3. The wind-tangent circle pulverized coal-fired boiler according to claim 2, wherein the hearth burnout zone is provided with a burnout air nozzle, the air supply device comprises a burnout air channel for supplying air to the burnout air nozzle, and the burnout air channel is provided with a sub-channel for supplying an air body to the bottom air supply nozzle.
4. The wind-tangent circle pulverized coal fired boiler according to claim 1, characterized in that at least one set of opposite sides of the upper part of the ash bucket are provided with the bottom air supply nozzles.
5. The wind-tangent circle pulverized coal combustion boiler according to claim 4, wherein the ash bucket comprises a bucket part which is positioned at the lower part and has a tapered cross section from top to bottom and a joining part which is positioned at the upper part and has all the peripheral side walls vertically arranged, and all the peripheral side walls of the joining part are provided with the bottom air supply nozzles.
6. The wind-tangent circle pulverized coal fired boiler according to claim 5, wherein the bottom air supply nozzles of the peripheral side wall of the joining portion are tangentially distributed to form a vortex in the middle of the inner side of the joining portion.
7. The wind-tangent circle pulverized coal combustion boiler as claimed in claim 6, wherein the bottom air supply nozzles are installed in the middle of the side wall of the joining portion and are laterally inclined with respect to the side wall, so that the bottom air supply nozzles on opposite sides are laterally staggered.
8. The wind-tangent circle pulverized coal combustion boiler as claimed in claim 7, wherein four to forty bottom air supply nozzles are arranged at the upper part of the ash hopper and are uniformly distributed on the wall surface of the peripheral side wall.
9. A wind tangent circle pulverized coal fired boiler according to any one of claims 1 to 8, characterized in that the inner end of said bottom air feed nozzle is arranged inclined upward.
10. The wind-tangent circle pulverized coal combustion boiler as claimed in claim 9, wherein the upward inclination angle of the inner end of the bottom air supply nozzle is not more than 45 degrees, and the wind speed of the overfire wind of the bottom air supply nozzle is 40-80 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011376840.XA CN112377894A (en) | 2020-11-30 | 2020-11-30 | Wind tangent circle pulverized coal combustion boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011376840.XA CN112377894A (en) | 2020-11-30 | 2020-11-30 | Wind tangent circle pulverized coal combustion boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112377894A true CN112377894A (en) | 2021-02-19 |
Family
ID=74590852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011376840.XA Pending CN112377894A (en) | 2020-11-30 | 2020-11-30 | Wind tangent circle pulverized coal combustion boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112377894A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847595A (en) * | 2021-09-26 | 2021-12-28 | 内蒙古靓固科技有限责任公司 | Coal-fired boiler with low carbon dioxide emission and combustion method |
-
2020
- 2020-11-30 CN CN202011376840.XA patent/CN112377894A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847595A (en) * | 2021-09-26 | 2021-12-28 | 内蒙古靓固科技有限责任公司 | Coal-fired boiler with low carbon dioxide emission and combustion method |
| CN113847595B (en) * | 2021-09-26 | 2023-08-22 | 内蒙古靓固科技有限责任公司 | Coal-fired boiler with low carbon dioxide emission and combustion method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101315184B (en) | Wall type arranged horizontal rich-lean direct current combustion device | |
| WO2013071713A1 (en) | Thick-thin coal dust separation and arrangement structure for single-fireball eight-corner straight-flow burner | |
| CN111520705B (en) | Exhaust gas post-positioned W-flame boiler with arch-mounted secondary air nozzles and air distribution method | |
| CN103134049A (en) | Multi-corner tangential multi-scale pulverized coal decoupling combustion device and decoupling combustion method thereof | |
| JPH0268403A (en) | Solid fuel burner | |
| CN108758613B (en) | Four-arch W-flame double-stage thick-thin combustion device | |
| CN202350012U (en) | Multi-angular tangential circle multi-scale coal dust decoupling combustion device | |
| CN101135451A (en) | Gas recombustion and two-channel thick-light integrated type low NOx combusting device | |
| CN101986028A (en) | Low-NOx W-type flame boiler with dry bottom hopper and furnace bottom air supplies distributed in bielliptical shape | |
| CN111189042A (en) | Multi-coal-type adaptive combustion system and method suitable for W flame boiler | |
| CN200989589Y (en) | Gas refiring and double-path level thin and thick integrated low NOx burner | |
| CN112377894A (en) | Wind tangent circle pulverized coal combustion boiler | |
| CN214147857U (en) | Wind tangent circle pulverized coal combustion boiler | |
| CN103697463A (en) | Up-and-down thick-and-thin primary air concentrated distribution type combustion device | |
| CN202303348U (en) | Vertical powder burning industrial boiler with top combustor spraying downwards | |
| CN115875663A (en) | Thermal power generation boiler with mixed combustion of ammonia and coal | |
| CN201193817Y (en) | Vertical coal water slurry industry boiler | |
| CN201212676Y (en) | Horizontal bias DC combustion apparatus of wall arrangement | |
| CN201779647U (en) | Burner device of pulverized coal boiler | |
| CN110319437B (en) | Oxygen-enriched multi-flame rotational flow pulverized coal burner | |
| CN109237465B (en) | Cyclone burner and cyclone burner ventilation air methane spraying system | |
| CN207486789U (en) | A kind of novel change arch angle W type flame boilers | |
| CN218328118U (en) | Deep combustion system applied to lean coal | |
| CN200975674Y (en) | Gas recombustion and two-channel Thick-light integrated type low NOx Combusting device | |
| CN216408946U (en) | High momentum straight flow type coal powder burner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |