CN207907231U - Coal process blends agstone system online on CFB boiler - Google Patents
Coal process blends agstone system online on CFB boiler Download PDFInfo
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- CN207907231U CN207907231U CN201820288545.0U CN201820288545U CN207907231U CN 207907231 U CN207907231 U CN 207907231U CN 201820288545 U CN201820288545 U CN 201820288545U CN 207907231 U CN207907231 U CN 207907231U
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Abstract
Coal process blends agstone system online on a kind of CFB boiler of the utility model protection, include the coal conveyer belt of conveying upper coal after broken qualification, coal conveyer belt overhung agstone hopper, the agstone hopper includes the limestone powder bin of top and is set to flour extraction pipe below, the flour extraction pipe is equipped with metering-type rotary feeder, pneumatic carrier of the limestone powder bin by bucket elevator or comprising storehouse pump connects column mill or agstone finished bin or vehicle, the utility model blends agstone in upper coal process, realize uniformly premixing outside the stove of agstone and coal, system cost is low, substance and equipment availability are high, it is blended by low calcium-sulphur ratio, it can ensure that the CaO content in lime-ash meets requirements of comprehensive utilization.
Description
Technical field
The utility model is related to CFB boilers, belong to field of dynamic engineering.
Background technology
CFB boiler uses low-temperature burning, and agstone is put into burner hearth, can be realized with a low cost partial removal SO2's
Purpose.But current technique exists compared with wet desulphurization or semi-dry desulphurization, and desulfurizing agent consumption is big, i.e., calcium sulfur ratio is high lacks
Point, CaO content is high in lime-ash, directly affects the comprehensive utilization of lime-ash.
CFB boiler desulfurized limestone powder enters stove mode and uses pneumatic conveying mode substantially at present, and this mode is due to feed
Enter stove point（Independent trepanning, lower overfiren air port, feed back leg）Configuration it is improper, can not achieve desulfurizing agent with burning generate SO2Have
Effect contact, using high calcium sulfur ratio, some is up to 5 ~ 6, and also difficulty reaches 95% or more to desulfuration efficiency, reason be agstone with
Coal respectively has a manor in stove, exists in " areas Fu Gai ", and " sulfur-rich area ".
" areas Fu Gai " and " sulfur-rich area " substance cause the substance for participating in chemically reacting chemistry since lateral motion capability is limited
Equivalent mismatches, therefore causes material consumption high, and effect is poor.
Especially in certain feeder forced shutdown, neighbouring agstone transport system is uncontrollable still toward the area
Add the agstone not needed in domain.
Utility model content
Coal process blends agstone to the technical issues of the utility model is solved online i.e. on a kind of CFB boiler of offer
System.
Technological means used by the utility model is as described below.
Coal process blends agstone system online on a kind of CFB boiler, including conveying it is broken it is qualified after upper coal it is defeated
Coal belt, coal conveyer belt overhung agstone hopper, the agstone hopper include the limestone powder bin of top and set
The flour extraction pipe being arranged below, the flour extraction pipe are equipped with metering-type rotary feeder, the limestone powder bin by bucket elevator or
Include the pneumatic carrier connection column mill or agstone finished bin or vehicle of storehouse pump.
The metering-type rotary feeder and the chain operation of coal conveyer belt, it is online toward defeated according to specific coal quality setting speed
Agstone is added in coal on coal belt.
The beneficial effects of the utility model：The utility model upper coal process blend agstone, realize agstone with
Uniformly premixing, although not having real-time response ability, cannot precisely ensure desulfurization emission request in most cases outside the stove of coal,
But this system is at low cost, and substance and equipment availability are high, and the auxiliary plan as follow-up desulfurization measure should be preferred, by low calcium sulphur
Than blending, it can ensure that the CaO content in lime-ash meets requirements of comprehensive utilization.
Especially in certain feeder forced shutdown, this system is such as individually used, no longer as conventional mode of movement,
The agstone not needed to is added toward the region in burner hearth.
Description of the drawings
Fig. 1 is the structural schematic diagram that the utility model blends agstone system online.
Specific implementation mode
The utility model is that coal process blends agstone device online on a kind of CFB boiler.
As shown in Figure 1, including the coal conveyer belt 1 of conveying upper coal after broken qualification, 1 overhung lime stone of coal conveyer belt
Powder bucket 2.
The agstone hopper 2 includes the limestone powder bin 21 of top and is set to flour extraction pipe 22 below, this goes out powder
Pipe 22 is equipped with metering-type rotary feeder 23, can calculate lime stone according to the chemical examination sulfur-bearing numerical value of coal and the calcium sulfur ratio of selection
With the matching blending amount of coal, the metering-type rotary feeder 23 and the chain operation of coaling system.
Pneumatic carrier of the limestone powder bin 21 by bucket elevator 3 or comprising storehouse pump connect column mill 4 or agstone at
Product storehouse or vehicle.Column mill or agstone finished bin can be used or vehicle provides the agstone of milled, carried by mechanically struggling against
The agstone of milled is sent into limestone powder bin 21 by machine or strength.
The utility model blends agstone in upper coal process, realizes uniformly premixing outside the stove of agstone and coal, though
So do not have real-time response ability, cannot precisely ensure desulfurization emission request in most cases, but at low cost, substance and equipment can
With rate height, the auxiliary plan as follow-up desulfurization measure should be preferred, is blended by low calcium-sulphur ratio, can ensure the CaO in lime-ash
Content meets requirements of comprehensive utilization.
Claims (2)
1. coal process blends agstone system online on a kind of CFB boiler, which is characterized in that comprising conveying after broken qualification
The coal conveyer belt of upper coal（1）, coal conveyer belt（1）Overhung agstone hopper（2）, the agstone hopper（2）Including
The limestone powder bin of top（21）Be set to flour extraction pipe below（22）, the flour extraction pipe（22）Equipped with metering-type rotate to
Material machine（23）, the limestone powder bin（21）By bucket elevator or pneumatic carrier connect column mill or agstone finished bin or
Vehicle.
2. coal process blends agstone system online on CFB boiler as described in claim 1, which is characterized in that the meter
Amount formula rotary feeder（23）With coal conveyer belt（1）Chain operation, it is online toward coal conveyer belt according to specific coal quality setting speed
（1）On coal in add agstone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820288545.0U CN207907231U (en) | 2018-03-01 | 2018-03-01 | Coal process blends agstone system online on CFB boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820288545.0U CN207907231U (en) | 2018-03-01 | 2018-03-01 | Coal process blends agstone system online on CFB boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207907231U true CN207907231U (en) | 2018-09-25 |
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ID=63561511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820288545.0U Active CN207907231U (en) | 2018-03-01 | 2018-03-01 | Coal process blends agstone system online on CFB boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN207907231U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608449A (en) * | 2019-10-09 | 2019-12-24 | 宁波正源电力有限公司 | Coal desulfurization method combining in-furnace desulfurization and wet desulfurization |
-
2018
- 2018-03-01 CN CN201820288545.0U patent/CN207907231U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608449A (en) * | 2019-10-09 | 2019-12-24 | 宁波正源电力有限公司 | Coal desulfurization method combining in-furnace desulfurization and wet desulfurization |
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