CN105485709B - A kind of adjustable pulverized coal distributor - Google Patents
A kind of adjustable pulverized coal distributor Download PDFInfo
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- CN105485709B CN105485709B CN201610004874.3A CN201610004874A CN105485709B CN 105485709 B CN105485709 B CN 105485709B CN 201610004874 A CN201610004874 A CN 201610004874A CN 105485709 B CN105485709 B CN 105485709B
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- coal
- regulating valve
- concentrated
- phase
- light phase
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- 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
- F23K2203/006—Fuel distribution and transport systems for pulverulent fuel
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- 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 pulverized coal distributor, including with the concentrated phase inner tube for being located in coal pulverizer outlet coal dust cylinder interior, light phase outer toroid is formed between concentrated phase inner tube and coal pulverizer outlet coal dust cylinder barrel；Tube section and light phase outer toroid section are all coaxially divided into concentrated 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 concentrated phase regulating valve and light phase regulating valve on every equal partial cross-section.Coal pulverizer outlet coal dust cylinder front end is provided with reducer pipe, and reducer pipe front end is provided with louver rings.Coal pulverizer outlet coal dust is concentrated by louver rings, under effect of inertia, dense outer light air-coal separating in progress, thick coal culm is concentrated in center, thin powdered coal is distributed in surrounding, 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 air quantity and the pulverized coal distributor of coal dust amount.
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 dust amount, 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 pulverized coal distributor, if
In on coal pulverizer outlet conduit, coal pulverizer outlet is provided with primary air piping, it is characterised in that：Coal pulverizer outlet coal is located in including same
The concentrated phase inner tube of powder cylinder interior, light phase outer toroid is formed between concentrated phase inner tube and coal pulverizer outlet coal dust cylinder barrel；Concentrated phase
Interior tube section and light phase outer toroid section are all coaxially divided into and the same number of number of the primary air piping, every equal partial cross-section point
It is not connected with a primary air piping, and concentrated phase regulating valve and light phase regulating valve is respectively equipped with every equal partial cross-section.
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.
Preferably, the concentrated phase inner tube equivalent diameter is that coal pulverizer exports 0.25~0.5 times of coal dust cylinder.
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 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 can shielded area be no more than the concentrated phase inner tube often divide equally sectional area 40%,
The light phase regulating valve can shielded area also be no more than the light 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 is concentrated by louver rings,
In the presence of inertia, dense outer light air-coal separating, the dense phase pulverized coal separated are entered in concentrated phase inner tube in progress, separation
Light phase coal dust out is entered in light phase outer toroid, and center concentrated phase inner tube and light phase outer toroid section are divided into First air
Quantity needed for pipe, and adjustable valve is set respectively in the concentrated phase of every decile on tube section and on light phase outer toroid section, lead to
Be adjusted after center concentrated phase regulating valve and the light phase regulating valve of outer toroid on the partial cross-section such as often, reach every decile dense phase pulverized coal with it is light
The mixed concentration of pulverized coal of phase coal dust and the purpose of wind speed 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 center, thin powdered coal is distributed in surrounding, then deep or light phase is all divided equally, corresponding per a deep or light
Coal dust is remixed into primary air piping；I.e. by interior dense outer light mode, distributed after coal dust is concentrated with centrosymmetric method
, so can be evenly distributed to each primary air piping；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 adjustable pulverized coal distributor structural representation that the present embodiment provides；
Fig. 3 show the profile of the line A-A 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 adjustable pulverized coal distributor structural representation that the present embodiment provides, and described adjustable coal dust divides
Orchestration is by louver rings 1, concentrated phase inner tube 2, reducer pipe 3, concentrated phase regulating valve 4, concentrated phase regulating valve connecting rod 5, light phase regulating valve 6, light
The grade of phase regulating valve connecting rod 7 forms.
Located at the rear end of coal pulverizer outlet coal dust cylinder 11, the front end of coal pulverizer outlet coal dust cylinder 11 is provided with to be become primary air piping 8
Footpath pipe 3, the front end of reducer pipe 3 are provided with louver rings 1.
Concentrated phase inner tube 2 is coaxially disposed with coal pulverizer outlet coal dust cylinder 11, and concentrated phase inner tube 2 is located at coal pulverizer outlet coal dust circle
Inside cylinder 11, the equivalent diameter of concentrated phase inner tube 2 is 0.25~0.5 times that coal pulverizer exports coal dust cylinder 11.Concentrated phase inner tube 2 and coal-grinding
Light phase outer toroid is formed between the barrel of machine outlet coal dust cylinder 11.
With reference to Fig. 3, the section of concentrated phase inner tube 2 is divided into 4 parts, identical with each coal pulverizer primary air piping number, and per
Concentrated phase regulating valve 4 is housed, concentrated phase regulating valve 4 connects concentrated phase regulating valve connecting rod 5 on partial cross-section.Can by concentrated phase regulating valve connecting rod 5
Concentrated phase regulating valve 4 is operated, concentrated phase regulating valve 4 can shielded area be no more than concentrated phase inner tube 2 often divide equally sectional area 40%.
Light 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 light phase regulating valve 6 is housed, light phase regulating valve 6 connects light phase regulating valve connecting rod 7.Can be to light phase by light phase regulating valve connecting rod 7
Regulating valve 6 is operated, light phase regulating valve 6 can shielded area be no more than light 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 the light phase outer toroid section of a quarter and a quarter concentrated phase, and will be connected per a section with a primary air piping
Connect.
The adjustable pulverized coal distributor 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 (6)
1. a kind of adjustable pulverized coal distributor, on coal pulverizer outlet conduit, coal pulverizer outlet is provided with primary air piping (8),
It is characterized in that：Including the concentrated phase inner tube (2) internal with coal pulverizer outlet coal dust cylinder (11) is located in, concentrated phase inner tube (2) with
Light phase outer toroid is formed between coal pulverizer outlet coal dust cylinder (11) barrel；Concentrated phase inner tube (2) section and light phase outer toroid section
All coaxially be divided into the primary air piping (8) the same number of number, per equal partial cross-section respectively with a primary air piping
(8) it is connected, and concentrated phase regulating valve (4) and light phase regulating valve (6) is respectively equipped with 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)；
The coal dust of coal pulverizer outlet is concentrated by the louver rings (1), dense outer light in progress in the presence of inertia
Air-coal separating, the dense phase pulverized coal separated enter that the concentrated phase inner tube (2) is inner, and light phase coal dust enters described light mutually cylindrical
In ring；It is adjusted by the concentrated phase regulating valve (4) on every equal partial cross-section and light phase regulating valve (6) so that corresponding every
Respectively dense phase pulverized coal air-flow is mixed with light phase breeze airflow, and be mixed into each primary air piping wind speed and coal powder density it is equal
Weighing apparatus.
A kind of 2. adjustable pulverized coal distributor as claimed in claim 1, it is characterised in that：Concentrated phase inner tube (2) equivalent
0.25~0.5 times of a diameter of coal pulverizer outlet coal dust cylinder (11).
A kind of 3. adjustable pulverized coal distributor as claimed in claim 1, it is characterised in that：The concentrated phase regulating valve (4) is even
Concentrated phase regulating valve connecting rod (5) is connect, concentrated phase regulating valve (4) can be operated by concentrated phase regulating valve connecting rod (5).
A kind of 4. adjustable pulverized coal distributor as claimed in claim 3, it is characterised in that：The light phase regulating valve (6) is even
Light phase regulating valve connecting rod (7) is connect, light phase regulating valve (6) can be operated by light phase regulating valve connecting rod (7).
A kind of 5. adjustable pulverized coal distributor as claimed in claim 4, it is characterised in that：The concentrated phase regulating valve (4) can
Shielded area is no more than the concentrated phase inner tube (2) and often divides equally the 40% of sectional area, and the light phase regulating valve (6) can shielded area
Often divide equally the 40% of sectional area no more than the light phase outer toroid.
A kind of 6. adjustable pulverized coal distributor as claimed in claim 4, it is characterised in that：The concentrated phase regulating valve (4) and
The structure of light phase regulating valve (6) is folding " covering of the fan " type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004874.3A CN105485709B (en) | 2016-01-05 | 2016-01-05 | A kind of adjustable pulverized coal distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004874.3A CN105485709B (en) | 2016-01-05 | 2016-01-05 | A kind of adjustable pulverized coal distributor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105485709A CN105485709A (en) | 2016-04-13 |
| CN105485709B true CN105485709B (en) | 2017-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610004874.3A Active CN105485709B (en) | 2016-01-05 | 2016-01-05 | A kind of adjustable pulverized coal distributor |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413386B (en) * | 2018-02-11 | 2019-10-15 | 中国神华能源股份有限公司 | Burner nozzle and buner system |
| CN110813514B (en) * | 2019-11-11 | 2020-09-08 | 西安交通大学 | Passive self-adjusting gas-solid two-phase distributor |
| CN111174227B (en) * | 2020-01-08 | 2021-09-17 | 山西晋钢智造科技实业有限公司 | Coal powder distributor for coal-fired blast furnace |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN2658589Y (en) * | 2003-11-10 | 2004-11-24 | 电站锅炉煤清洁燃烧国家工程研究中心 | Vertical double adjustable pulverized-coal distributor |
| US8403602B2 (en) * | 2011-03-16 | 2013-03-26 | Babcock Power Services, Inc. | Coal flow splitters and distributor devices |
| CN202216242U (en) * | 2011-08-18 | 2012-05-09 | 徐军 | Rich-thin phase separator in external combustion type combustion device |
| CN203517857U (en) * | 2013-07-05 | 2014-04-02 | 北京华清优燃科技有限公司 | Rotation-speed-changeable rotary pulverized-coal distributor |
| CN104197326A (en) * | 2014-07-15 | 2014-12-10 | 北京神雾环境能源科技集团股份有限公司 | Novel swirl pulverized coal burner |
| 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 |
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- 2016-01-05 CN CN201610004874.3A patent/CN105485709B/en active Active
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| CN105485709A (en) | 2016-04-13 |
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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 |
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