CN208475369U - Coal-burning boiler pulverized coal preparation system - Google Patents
Coal-burning boiler pulverized coal preparation system Download PDFInfo
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- CN208475369U CN208475369U CN201820826347.5U CN201820826347U CN208475369U CN 208475369 U CN208475369 U CN 208475369U CN 201820826347 U CN201820826347 U CN 201820826347U CN 208475369 U CN208475369 U CN 208475369U
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Abstract
The utility model embodiment discloses a kind of coal-burning boiler pulverized coal preparation system, comprising: run coal bin；Coal pulverizer, the drain hole of inlet communication run coal bin；Pressure fan, the entrance of outlet coal pulverizer；Boiler induced-draft fan, inlet communication coal-burning boiler, the pipeline between outlet coal pulverizer and pressure fan；Coal dust classifier comprising tailing separator and pulverized-coal collector, the outlet end of pulverized-coal collector include that a discharge and a lack of gas export, the outlet of tailing separator inlet communication coal pulverizer, outlet pulverized-coal collector import；Coal dust intermediate bin, inlet communication discharge, the outlet of outlet lack of gas.The utility model is dried the raw coal of coal pulverizer using the hot fume in boiler and conveys the coal dust after coal pulverizer is ground, and it is sent back to the lack of gas of coal pulverizer as a part of primary gas in boiler, reduce the oxygen content in First air, reduce the production quantity of NOx, reduce simultaneously and Secondary Air is tied up, reduces slagging.
Description
Technical field
The utility model relates to generating plant pulverized coal boiler pulverized coal preparation system field more particularly to a kind of coal-burning boiler pulverized coal preparation systems.
Background technique
In present production technology, the lack of gas of low speed coal mill warehouse formula pulverized coal carried by hot air pulverized coal preparation system are straight as tertiary air
It taps into burning in furnace, coal dust is sent into burning in furnace by heat primary air.When boiler uses low NOx combustion mode, due to pot
Outlet of still NOx discharge need to be controlled in certain numerical value, therefore biggish tertiary air quantity and primary air flow is caused to be sent into burner hearth, and
Biggish tertiary air quantity and primary air flow are sent into the share for having tied up secondary air flow, reduce secondary air ratio.Cause Secondary Air rigid
Property be deteriorated, fluid field in furnace deteriorate, easy coking.
Utility model content
The purpose of the utility model is to overcome above-mentioned technical deficiencies, propose a kind of coal-burning boiler pulverized coal preparation system, solve existing
The technical issues of having First air in technology and wind flow is larger three times, tying up the share of Secondary Air, be easy coking in furnace.
In order to reach above-mentioned technical purpose, the utility model embodiment provides a kind of coal-burning boiler pulverized coal preparation system, the combustion
Coal burning boiler pulverized coal preparation system includes:
Run coal bin；
Coal pulverizer, the drain hole of inlet communication run coal bin；
Pressure fan, the entrance of outlet coal pulverizer, for raw coal to be blown into coal pulverizer；
Boiler induced-draft fan, inlet communication coal-burning boiler, the pipeline between outlet coal pulverizer and pressure fan；
Coal dust classifier comprising tailing separator and pulverized-coal collector, the outlet end of pulverized-coal collector include a coal
Powder outlet and lack of gas outlet, the outlet of tailing separator inlet communication coal pulverizer, outlet pulverized-coal collector import；
Coal dust intermediate bin, inlet communication discharge, the outlet of outlet lack of gas.
Compared with prior art, the utility model has the following beneficial effects: the coal-burning boiler powder system of the utility model
System dries the raw coal of coal pulverizer using the hot fume in boiler and conveys the coal dust after coal pulverizer is ground, and by the weary of coal pulverizer
Gas is sent back in boiler as a part of primary gas, reduces the oxygen content in First air, reduces the production quantity of NOx, simultaneously
Reduce and Secondary Air is tied up, reduces slagging.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of coal-burning boiler pulverized coal preparation system provided by the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.
Referring to Figure 1, Fig. 1 is the structural schematic diagram of coal-burning boiler pulverized coal preparation system provided by the utility model.
Coal-burning boiler pulverized coal preparation system include: run coal bin 1, raw coal batcher 2, coal pulverizer 3, pressure fan 4, boiler induced-draft fan 5,
Desulfurizer 6, regulating valve 7, oxygen amount meter 8, tailing separator 9, pulverized-coal collector 10, coal dust intermediate bin 11 and mill exhauster 12.
Run coal bin 1 is connected to coal pulverizer 3 by raw coal batcher 2, and pressure fan 4 is connected to the entrance of coal pulverizer 3, is used for coal-grinding
Coal dust is worn into raw coal drying in machine 3, and the coal dust conveyed after drying enters tailing separator 9.The inlet end of boiler induced-draft fan 5
It is connected to coal-burning boiler, the branch of outlet side one is connected to regulating valve 7, and the pipeline being connected between pressure fan 4 and coal pulverizer 3, another
Branch connection desulfurizer 6 simultaneously accesses gas emission device (not shown).Boiler induced-draft fan 4 is by the hot fume in coal-burning boiler
It after regulating valve 7, is mixed into the gas that pressure fan 4 blasts, oxygen amount meter 8 is set on pipeline, for measuring containing for the gas
Oxygen amount.
The pulverized coal preparation system of pulverized-coal fired boiler is often according to different design coals, to design pulverized coal preparation system, in general
A kind of coal corresponds to a kind of pulverized coal preparation system, and the coal adaptability of pulverized coal preparation system is difficult to adapt to power plant under current situation and carrys out answering for coal
Polygamy and diversity.In the utility model embodiment, oxygen amount meter 8 is for detecting the oxygen content after flue gas mixes with air, needle
To different coals, the intake of flue gas is adjusted by regulating valve 7, changes the oxygen content for entering gas in coal pulverizer 3,
With different coals, applicability is improved.
The outlet of coal pulverizer 3 is sequentially communicated tailing separator 9 and pulverized-coal collector 10, and tailing separator 9 is to coal pulverizer 3
The coal dust ground is filtered for the first time, is left biggish particle and is continued to grind back to coal pulverizer 3, fine breeze is sent to fine powder
In separator 10.The outlet end of pulverized-coal collector 10 includes that a discharge and a lack of gas export, and discharge is connected to coal dust
Intermediate bin 11, coal dust intermediate bin 11 is for storing fine breeze.The import of lack of gas outlet mill exhauster 12, mill exhauster 12 is by lack of gas
It is divided into two parts, a part is connected to the drain hole of coal dust intermediate bin 11 as burning in pneumatic transmission back boiler three times, another part,
Fine breeze is blown into primary gas, burning in coal-burning boiler is sent into.
During 3 powder processed of coal pulverizer, due to being mixed into for hot fume, the drying capacity of pulverized coal preparation system is not only increased,
And the risk of pulverized coal preparation system spontaneous combustion explosion can be greatly reduced.Primary gas and three times oxygen concentration in gas are reduced simultaneously, no
The risk that burner nozzle is burned can be only reduced, and the generation of NOx can be reduced.
Implement the utility model embodiment, has the following beneficial effects: that the coal-burning boiler pulverized coal preparation system of the utility model is adopted
The raw coal of coal pulverizer is dried with the hot fume in boiler and conveys the coal dust after coal pulverizer is ground, and the lack of gas of coal pulverizer are made
A part for primary gas is sent back in boiler, and the oxygen content in First air is reduced, and is reduced the production quantity of NOx, is reduced simultaneously
Secondary Air is tied up, reduces slagging.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (4)
1. a kind of coal-burning boiler pulverized coal preparation system, which is characterized in that the coal-burning boiler pulverized coal preparation system includes:
Run coal bin；
Coal pulverizer, the drain hole of run coal bin described in inlet communication；
Pressure fan, the entrance of coal pulverizer described in outlet；
Boiler induced-draft fan, inlet communication coal-burning boiler, the pipeline described in outlet between coal pulverizer and the pressure fan；
Coal dust classifier comprising tailing separator and pulverized-coal collector, the outlet end of the pulverized-coal collector include a coal
Powder outlet and a lack of gas export, the outlet of coal pulverizer described in the tailing separator inlet communication, fine powder described in outlet
Separator import；
Coal dust intermediate bin, discharge described in inlet communication, lack of gas outlet described in outlet.
2. coal-burning boiler pulverized coal preparation system according to claim 1, which is characterized in that the coal-burning boiler pulverized coal preparation system also wraps
A raw coal batcher is included, is arranged between the run coal bin and the coal pulverizer.
3. coal-burning boiler pulverized coal preparation system according to claim 1, which is characterized in that the coal-burning boiler pulverized coal preparation system also wraps
A regulating valve and an oxygen amount meter are included, along the direction of gas transport, the regulating valve and the oxygen amount meter are sequentially arranged in institute
It states on the pipeline between boiler induced-draft fan and the coal pulverizer.
4. coal-burning boiler pulverized coal preparation system according to claim 1, which is characterized in that the coal-burning boiler pulverized coal preparation system also wraps
A mill exhauster is included, lack of gas described in inlet communication export, the outlet of coal dust intermediate bin described in outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820826347.5U CN208475369U (en) | 2018-05-30 | 2018-05-30 | Coal-burning boiler pulverized coal preparation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820826347.5U CN208475369U (en) | 2018-05-30 | 2018-05-30 | Coal-burning boiler pulverized coal preparation system |
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| CN208475369U true CN208475369U (en) | 2019-02-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750373A (en) * | 2020-08-07 | 2020-10-09 | 西安热工研究院有限公司 | Flue gas recirculation system for preventing accumulated powder of coal powder pipeline of medium-speed coal mill from spontaneous combustion |
| CN112844650A (en) * | 2021-01-05 | 2021-05-28 | 北京仁长德恒能源科技研究院有限公司 | Coal-fired power plant combined coal pulverizing system and coal pulverizing method thereof |
| CN113154368A (en) * | 2021-06-04 | 2021-07-23 | 西安热工研究院有限公司 | Pulverized coal boiler fan arrangement system for reducing noises of air feeder and primary fan |
| CN113776075A (en) * | 2021-08-30 | 2021-12-10 | 西安交通大学 | Walnut shell raw coal blending combustion pulverizing system |
-
2018
- 2018-05-30 CN CN201820826347.5U patent/CN208475369U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750373A (en) * | 2020-08-07 | 2020-10-09 | 西安热工研究院有限公司 | Flue gas recirculation system for preventing accumulated powder of coal powder pipeline of medium-speed coal mill from spontaneous combustion |
| CN112844650A (en) * | 2021-01-05 | 2021-05-28 | 北京仁长德恒能源科技研究院有限公司 | Coal-fired power plant combined coal pulverizing system and coal pulverizing method thereof |
| CN113154368A (en) * | 2021-06-04 | 2021-07-23 | 西安热工研究院有限公司 | Pulverized coal boiler fan arrangement system for reducing noises of air feeder and primary fan |
| CN113776075A (en) * | 2021-08-30 | 2021-12-10 | 西安交通大学 | Walnut shell raw coal blending combustion pulverizing system |
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