CN105546569B - A kind of pulverized coal distributor of adjustable wind speed and coal powder density - Google Patents
A kind of pulverized coal distributor of adjustable wind speed and coal powder density Download PDFInfo
- Publication number
- CN105546569B CN105546569B CN201610004873.9A CN201610004873A CN105546569B CN 105546569 B CN105546569 B CN 105546569B CN 201610004873 A CN201610004873 A CN 201610004873A CN 105546569 B CN105546569 B CN 105546569B
- Authority
- CN
- China
- Prior art keywords
- coal
- regulating valve
- light phase
- concentrated
- phase
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/20—Feeding/conveying devices
- F23K2203/201—Feeding/conveying devices using pneumatic means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention provides a kind of adjustable wind speed and the pulverized coal distributor of coal powder density, including with the light phase inner tube for being located in coal pulverizer outlet coal dust cylinder interior, concentrated phase outer toroid is formed between light phase inner tube and coal pulverizer outlet coal dust cylinder barrel；Tube section and concentrated phase outer toroid section are all coaxially divided into light phase is connected with a primary air piping respectively with the same number of number of the primary air piping, every equal partial cross-section, and is respectively equipped with light phase regulating valve and concentrated phase regulating valve on every equal partial cross-section.Rotating vane is provided with the reducer pipe of coal pulverizer outlet coal dust cylinder front end, reducer pipe front end is provided with louver rings.Coal pulverizer outlet coal dust is concentrated twice by louver rings and rotating vane, under effect of inertia, twice after air-coal separating, thick coal culm is concentrated in outer toroid, thin powdered coal is distributed in interior annular, then deep or light phase is all divided equally, it is corresponding to be mixed into primary air piping per a bias pulverized coal, it is evenly distributed；And regulating valve is set to the deep or light phase of every portion, convenient regulation.
Description
Technical field
The present invention relates to a kind of thermal power plant pulverized coal distributor, more particularly to one kind can be same coal pulverizer each one
Secondary airduct evenly distributes the pulverized coal distributor of air quantity and coal powder density.
Background technology
Pulverized coal distributor typically applies on the main pulverized coal channel of coal pulverizer outlet, passes through the distribution of pulverized coal distributor, energy
Enough play the purpose that air quantity and coal dust amount are evenly distributed for same each primary air piping of coal pulverizer.
Whether coal pulverizer exports each primary air piping coal powder distribation uniformly larger to the combustion effects of boiler.When coal distributes inequality
When, the coal dust amount for actually entering each burner differs larger, wind powder proportioning easily occurs and mismatches, causes burning tissues to deteriorate.
Following influence can be caused on boiler：
(1) thermal deviation
Because the deviation of coal dust powder amount is present, boiler local heat load deviation can be caused larger, in turn result in boiler furnace
The thermal deviation of outlet.
(2) local overheating and high temperature corrosion
Because the deviation of coal dust powder amount is present, regional area wind coal proportion can be caused to lack of proper care, the big region of powder amount is negative because of heat
Lotus is higher, easily causes local water screen tube overtemperature.In addition, high powder amount region easily causes oxygen amount deficiency, reducing atmosphere is serious,
High temperature corrosion can be caused for a long time.
(3) burn insufficient
Because the deviation of coal dust powder amount is present, local wind's powder can be caused to mismatch：The big region of powder amount and air quantity then differs
Fixed big, this will result in ischaemia, have very big restriction to the after-flame of coal dust.
(4) varying duty steam temperature Steam Pressure Fluctuation
Because the deviation presence of coal dust powder amount can cause the mixing of wind powder uneven, easily causing local ignition time in stove differs,
Burning tissues deteriorate, and can cause the fluctuation of steam temperature, vapour pressure and combustion chamber draft.
As described above, pulverized coal distributor is very big to the combustion effects of boiler, still, many power plant do not install coal but at present
Powder distributor, because, pulverized coal distributor in the market is grid type or yi word pattern, as shown in figure 1, i.e. coal powder distribation
Each primary air piping of device outlet, which is presented, from left to right to be arranged, and coal pulverizer outlet coal powder density is due to flow rotation inside coal pulverizer
And the relation such as local resistance, it will usually the larger situation of left and right sides coal powder density deviation occur, i.e., left (right side) side coal powder density is
The situation of the several times of right (left side) side coal powder density, so, even the pulverized coal distributor equipped with grid type or yi word pattern, it is also difficult to
Each primary air piping powder amount and the purpose of wind speed equilibrium are reached by regulation.To sum up, because traditional coal dust dispenser designs do not consider
The situation larger to left and right sides coal powder density deviation, therefore, traditional pulverized coal distributor modulability in practice is poor.
The content of the invention
Can be that same each primary air piping of coal pulverizer evenly distributes the technical problem to be solved in the present invention is to provide one kind
Air quantity and coal powder density, and the pulverized coal distributor that modulability is strong, resistance is small.
In order to solve the above-mentioned technical problem, the technical scheme is that providing a kind of adjustable wind speed and coal powder density
Pulverized coal distributor, on coal pulverizer outlet conduit, coal pulverizer outlet is provided with primary air piping, it is characterised in that：Including coaxially setting
In the light phase inner tube of coal pulverizer outlet coal dust cylinder interior, formed between light phase inner tube and coal pulverizer outlet coal dust cylinder barrel dense
Phase outer toroid；Tube section and concentrated phase outer toroid section are all coaxially divided into and the same number of part of the primary air piping in light phase
Number, be connected respectively with a primary air piping per equal partial cross-section, and per equal partial cross-section on be respectively equipped with light phase regulating valve and dense
Phase regulating valve.
Preferably, one end connecting reducing pipe one end that coal pulverizer outlet coal dust cylinder exports away from coal pulverizer, reducing
The pipe other end is provided with louver rings；Rotating vane is provided with reducer pipe.
Preferably, the rotating vane can be set 12~24 altogether.
Preferably, the rotating speed of the rotating vane is adjusted by rotating controlled motor.
Preferably, the light phase inner tube equivalent diameter is that coal pulverizer exports 0.6~0.85 times of coal dust cylinder.
Preferably, the light phase regulating valve connects light phase regulating valve connecting rod, and light phase can be adjusted by light phase regulating valve connecting rod
Section valve is operated.
Preferably, the concentrated phase regulating valve connection concentrated phase regulating valve connecting rod, can be adjusted by concentrated phase regulating valve connecting rod to concentrated phase
Section valve is operated.
Preferably, the light phase regulating valve can shielded area be no more than the light phase inner tube often divide equally sectional area 40%,
The concentrated phase regulating valve can shielded area also be no more than the concentrated phase outer toroid often divide equally sectional area 40%.
Preferably, the structure of the concentrated phase regulating valve and light phase regulating valve is folding " covering of the fan " type structure.
The principle of pulverized coal distributor provided by the invention is：The coal dust of coal pulverizer outlet passes through louver rings and rotating vane
Concentrated twice, in the presence of inertia, twice after air-coal separating, the dense phase pulverized coal separated enters concentrated phase outer toroid
In, light phase coal dust enters in light phase interior annular, and inside and outside ring cross-section is divided into the quantity needed for primary air piping, every etc.
Adjustable valve is set respectively on the concentrated phase outer toroid section divided and on light phase interior annular section, passes through outer toroid on the partial cross-section such as every
Concentrated phase regulating valve and the light phase regulating valve of interior annular are adjusted so that corresponding per decile outer toroid dense phase pulverized coal air-flow and inner circle
After the light phase breeze airflow of ring is mixed, reach the purpose of the wind speed for being mixed into each primary air piping and coal powder density equilibrium.
Device provided by the invention overcomes the problem of prior art coal pulverizer outlet coal powder density skewness, structure letter
Single, by the way that thick coal culm is concentrated in into outer toroid, thin powdered coal is distributed in interior annular, then deep or light phase is all divided equally, corresponding per a
Bias pulverized coal is remixed into primary air piping；I.e. by outer dense interior light mode, with centrosymmetric method after coal dust is concentrated
Each primary air piping is assigned to, so can be evenly distributed；And regulating valve, convenient regulation are set to every a deep or light phase.
Brief description of the drawings
Fig. 1 is traditional pulverized coal distributor schematic diagram；
Fig. 2 is the pulverized coal distributor structural representation of adjustable wind speed and coal powder density that the present embodiment provides；
Fig. 3 show the profile of the line A-A along Fig. 2；
Fig. 4 show the profile of the line B-B along Fig. 2.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
For the more convenient use for understanding this pulverized coal distributor, now illustrated by taking 300MW Process In A Tangential Firings as an example, this coal
Powder distributor is installed on station boiler coal pulverizer outlet conduit, and coal pulverizer outlet is provided with 4 primary air pipings.
Fig. 2 is the pulverized coal distributor structural representation of adjustable wind speed and coal powder density that the present embodiment provides, described
The pulverized coal distributor of adjustable wind speed and coal powder density is by louver rings 1, light phase inner tube 2, reducer pipe 3, concentrated phase regulating valve 4, dense
Phase regulating valve connecting rod 5, light phase regulating valve 6, light phase regulating valve connecting rod 7, the rotation composition such as controlled motor 9 and rotating vane 10.
Primary air piping 8 becomes located at the rear end of coal pulverizer outlet coal dust cylinder 11, the front end connection of coal pulverizer outlet coal dust cylinder 11
Footpath pipe 3, the front end of reducer pipe 3 are provided with louver rings 1.Rotating vane 10 is provided with reducer pipe 3, with reference to Fig. 4, rotating vane 10 altogether may be used
12~24 are set, its rotating speed can be adjusted by rotating controlled motor 9, and adjustable range is 0~60rpm.
Light phase inner tube 2 is coaxially disposed with coal pulverizer outlet coal dust cylinder 11, and light phase inner tube 2 is located at coal pulverizer outlet coal dust circle
Inside cylinder 11, the light equivalent diameter of phase inner tube 2 is 0.6~0.85 times that coal pulverizer exports coal dust cylinder 11.Light phase inner tube 2 and coal-grinding
Concentrated phase outer toroid is formed between the barrel of machine outlet coal dust cylinder 11.
With reference to Fig. 3, the light section of phase inner tube 2 is divided into 4 parts, identical with each coal pulverizer primary air piping number, and per
Light phase regulating valve 6 is housed, light phase regulating valve 6 connects light phase regulating valve connecting rod 7 on partial cross-section.Can by light phase regulating valve connecting rod 7
Light phase regulating valve 6 is operated, light phase regulating valve 6 can shielded area be no more than light phase inner tube 2 often divide equally sectional area 40%.
Concentrated phase outer toroid section is also divided into 4 parts, identical with each coal pulverizer primary air piping number, and per equal partial cross-section
Upper that concentrated phase regulating valve 4 is housed, concentrated phase regulating valve 4 connects concentrated phase regulating valve connecting rod 5.Can be to concentrated phase by concentrated phase regulating valve connecting rod 5
Regulating valve 4 is operated, concentrated phase regulating valve 4 can shielded area be no more than concentrated phase outer toroid often divide equally sectional area 40%.
The structure of concentrated phase regulating valve 4 and light phase regulating valve 6 is folding " covering of the fan " type structure.
So, pulverized coal distributor outlet is divided into 4 parts just according to the feature of Process In A Tangential Firing, includes per portion
Tube section in a quarter concentrated phase outer toroid section and the light phase of a quarter, and will be connected per a section with a primary air piping
Connect.
The pulverized coal distributor of adjustable wind speed and coal powder density that the present embodiment provides, in use, comprising the following steps that：
Step 1, wind speed and coal concentration measuring device are installed on First air straight length.
Step 2, the position that all concentrated phase regulating valves 4 and light phase regulating valve 6 are first placed in standard-sized sheet；
Step 3, start rotation controlled motor 9, rotate rotating vane 10；
The coal powder density of each pipe, dense corresponding to the airduct higher to coal powder density in step 4, measurement First air straight length
Phase regulating valve 4 suitably turns down；
The wind speed of each pipe, the light phase regulating valve corresponding to the airduct higher to wind speed in step 5, measurement First air straight length
6 suitably turn down；
Step 6, adjusted by the alternating of step 4 and step 5, most each primary air piping coal powder density of same coal pulverizer at last
Deviation adjusting to wind speed deviation adjusting within 5% to 5% within.
Claims (8)
1. the pulverized coal distributor of a kind of adjustable wind speed and coal powder density, on coal pulverizer outlet conduit, coal pulverizer outlet is set
Once airduct (8), it is characterised in that：The internal light phase inner tube (2) of coal pulverizer outlet coal dust cylinder (11) is located in including same,
Concentrated phase outer toroid is formed between light phase inner tube (2) and coal pulverizer outlet coal dust cylinder (11) barrel；Light phase inner tube (2) section and dense
Phase outer toroid section be all coaxially divided into the primary air piping (8) the same number of number, per equal partial cross-section respectively with one
The primary air piping (8) is connected, and is respectively equipped with light phase regulating valve (6) and concentrated phase regulating valve (4) on every equal partial cross-section；
Described one end connecting reducing pipe (3) one end of coal pulverizer outlet coal dust cylinder (11) away from coal pulverizer outlet, reducer pipe (3)
The other end is provided with louver rings (1)；Rotating vane (10) is provided with reducer pipe (3)；
The coal dust of coal pulverizer outlet is concentrated twice by the louver rings (1) and rotating vane (10), in the work of inertia
Under, twice after air-coal separating, the dense phase pulverized coal separated is entered in the concentrated phase outer toroid, and light phase coal dust enters institute
It is inner to state light phase inner tube (2)；It is adjusted, is made by the light phase regulating valve (6) on every equal partial cross-section and concentrated phase regulating valve (4)
Corresponding to often divide equally dense phase pulverized coal air-flow mixed with light phase breeze airflow, and be mixed into each primary air piping wind speed and
Coal powder density is balanced.
A kind of 2. pulverized coal distributor of adjustable wind speed and coal powder density as claimed in claim 1, it is characterised in that：The rotation
Rotating vane piece (10) can be set 12~24 altogether.
A kind of 3. pulverized coal distributor of adjustable wind speed and coal powder density as claimed in claim 1, it is characterised in that：The rotation
The rotating speed of rotating vane piece (10) is adjusted by rotating controlled motor (9).
A kind of 4. pulverized coal distributor of adjustable wind speed and coal powder density as claimed in claim 1, it is characterised in that：It is described light
Phase inner tube (2) equivalent diameter is 0.6~0.85 times that coal pulverizer exports coal dust cylinder (11).
A kind of 5. pulverized coal distributor of adjustable wind speed and coal powder density as claimed in claim 1, it is characterised in that：It is described light
Phase regulating valve (6) connects light phase regulating valve connecting rod (7), and light phase regulating valve (6) can be grasped by light phase regulating valve connecting rod (7)
Make.
A kind of 6. pulverized coal distributor of adjustable wind speed and coal powder density as claimed in claim 5, it is characterised in that：It is described dense
Concentrated phase regulating valve (4) can be grasped by phase regulating valve (4) connection concentrated phase regulating valve connecting rod (5) by concentrated phase regulating valve connecting rod (5)
Make.
A kind of 7. pulverized coal distributor of adjustable wind speed and coal powder density as claimed in claim 6, it is characterised in that：It is described light
Phase regulating valve (6) can shielded area be no more than the light phase inner tube (2) often divide equally sectional area 40%, the concentrated phase regulating valve
(4) can shielded area also be no more than the concentrated phase outer toroid often divide equally sectional area 40%.
A kind of 8. pulverized coal distributor of adjustable wind speed and coal powder density as claimed in claim 6, it is characterised in that：It is described dense
The structure of phase regulating valve (4) and light phase regulating valve (6) is folding " covering of the fan " type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004873.9A CN105546569B (en) | 2016-01-05 | 2016-01-05 | A kind of pulverized coal distributor of adjustable wind speed and coal powder density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004873.9A CN105546569B (en) | 2016-01-05 | 2016-01-05 | A kind of pulverized coal distributor of adjustable wind speed and coal powder density |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105546569A CN105546569A (en) | 2016-05-04 |
| CN105546569B true CN105546569B (en) | 2017-11-21 |
Family
ID=55825951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610004873.9A Active CN105546569B (en) | 2016-01-05 | 2016-01-05 | A kind of pulverized coal distributor of adjustable wind speed and coal powder density |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105546569B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108758680B (en) * | 2018-06-01 | 2019-10-15 | 中国神华能源股份有限公司 | Coal even separator and coal pulverizer |
| CN109681899A (en) * | 2018-12-26 | 2019-04-26 | 上海发电设备成套设计研究院有限责任公司 | Coal even separator and its application method is adjusted in a kind of station boiler |
| CN109737448A (en) * | 2019-02-25 | 2019-05-10 | 西安热工研究院有限公司 | A kind of built-in type energy saving moulded coal powder distributor |
| CN110986080B (en) * | 2019-11-15 | 2021-12-31 | 大唐华银电力股份有限公司耒阳分公司 | Boiler pulverized coal concentration measuring and adjusting device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2295917Y (en) * | 1997-06-05 | 1998-10-28 | 电站锅炉煤清洁燃烧国家工程研究中心 | Dual adjustable coal powder distributor |
| CN1400420A (en) * | 2002-09-09 | 2003-03-05 | 国电热工研究院 | Double-stepping fuel combustion method and its double-stepping cyclone burner |
| CN2663827Y (en) * | 2003-09-03 | 2004-12-15 | 贾朝群 | A pulverized coal dispenser |
| JP2012192404A (en) * | 2011-03-16 | 2012-10-11 | Babcock Power Services Inc | Coal flow splitter and distributor device |
| CN204388109U (en) * | 2014-12-05 | 2015-06-10 | 苏州西热节能环保技术有限公司 | A kind of wind powder distributor |
-
2016
- 2016-01-05 CN CN201610004873.9A patent/CN105546569B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2295917Y (en) * | 1997-06-05 | 1998-10-28 | 电站锅炉煤清洁燃烧国家工程研究中心 | Dual adjustable coal powder distributor |
| CN1400420A (en) * | 2002-09-09 | 2003-03-05 | 国电热工研究院 | Double-stepping fuel combustion method and its double-stepping cyclone burner |
| CN2663827Y (en) * | 2003-09-03 | 2004-12-15 | 贾朝群 | A pulverized coal dispenser |
| JP2012192404A (en) * | 2011-03-16 | 2012-10-11 | Babcock Power Services Inc | Coal flow splitter and distributor device |
| CN204388109U (en) * | 2014-12-05 | 2015-06-10 | 苏州西热节能环保技术有限公司 | A kind of wind powder distributor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105546569A (en) | 2016-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105546569B (en) | A kind of pulverized coal distributor of adjustable wind speed and coal powder density | |
| CN104075319B (en) | Biomass gas combustion device used for industrial boiler | |
| CN105485709B (en) | A kind of adjustable pulverized coal distributor | |
| CN205351318U (en) | Air classification hangs down NOx gas burner with adjustable whirl intensity | |
| CN201475997U (en) | Coal dust burner with self-stabilizing capability, three-stage air-distribution and low NOx content | |
| CN105509035B (en) | A kind of method, apparatus and automatic control system of determining opposed firing intake | |
| CN105090949B (en) | Method for making air inflows of secondary air pipes of turbulent burner even and measuring device | |
| CN106051759B (en) | Multi-stage separation central backflow formula axial rotational flow burner | |
| CN108317539A (en) | A kind of boiler secondary air subtube supply air system | |
| CN207514904U (en) | The Industrial Boiler coal burner of wide coal adaptability | |
| CN206831550U (en) | A kind of compact pulverized coal distributor | |
| CN202024323U (en) | Powder fuel combustor | |
| Bălănescu et al. | Experimental study on the combustion system optimization in the case of a 36 kW condensing boiler | |
| CN109058992B (en) | Microchannel distribution ultra-low nitrogen combustor | |
| CN204084351U (en) | A kind of turbulent burner of First air air-coal separating | |
| CN107255274A (en) | A kind of low nitrogen burner for gas boiler | |
| CN202581814U (en) | Air current limiting device for smoke tube of gas appliance | |
| CN109681899A (en) | Coal even separator and its application method is adjusted in a kind of station boiler | |
| CN206280964U (en) | Distributed static surface burner gas separate system | |
| CN207999808U (en) | A kind of band axial direction adjustable vane prevents the device of burner nozzle slagging | |
| CN108443868B (en) | Air/lean gas replaceable low NO x Swirl burner | |
| CN208177640U (en) | A kind of three class control furnace cigarette mixing regulating system | |
| CN206638042U (en) | Tobacco blending device for heat storage type combustion industrial furnace and the tobacco blending component and industrial furnace with tobacco blending device | |
| CN102620295B (en) | Industrial radial concentration dual-air regulation rotational flow coal powder and fuel gas mixed combustor | |
| CN206973556U (en) | Ultralow nitrogen gas burner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200240 Shanghai city Minhang District Jianchuan Road No. 1115 Patentee after: SHANGHAI POWER EQUIPMENT Research Institute Address before: 200240 Shanghai city Minhang District Jianchuan Road No. 1115 Patentee before: SHANGHAI POWER EQUIPMENT Research Institute |
|
| CP01 | Change in the name or title of a patent holder |