CN209147133U - A kind of device explosion-proof for π type boiler the ball type pulverizer system - Google Patents
A kind of device explosion-proof for π type boiler the ball type pulverizer system Download PDFInfo
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- CN209147133U CN209147133U CN201821442517.6U CN201821442517U CN209147133U CN 209147133 U CN209147133 U CN 209147133U CN 201821442517 U CN201821442517 U CN 201821442517U CN 209147133 U CN209147133 U CN 209147133U
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Abstract
The utility model relates to a kind of devices explosion-proof for π type boiler the ball type pulverizer system.The country's explosion-proof means of pulverized coal preparation system are substantially using temperature controlled method, including pulverizer outlet temperature control and the control of middle storage coal-grinding powder cabin temperature at present, there are some problems.The utility model uses furnace cigarette blower, and the hot stove cigarette that SCR denitration device exports is pumped out and is sent into coal pulverizer after mixing with cold wind, reduces the oxygen amount in pulverized coal preparation system 16% hereinafter, hot stove cigarette substitutes heated-air drying coal dust simultaneously；Oxygen analyzer can detect pulverized coal preparation system oxygen amount automatically, and computer, which fluctuates adjustment hot fume electromagnetism main valve, cold wind solenoid valve, the side A flue gas in time according to oxygen amount, takes out pipe solenoid valve and the side B flue gas pumping pipe electromagnetism valve opening, carry out full-automatic explosion-proof regulation；Meanwhile flue gas is extracted from SCR denitration device and air preheater intermediate flue, it is possible to reduce exhaust gas volumn and denitration residue ammonia alleviate air preheater because of blocking and etching problem caused by ammonium hydrogen sulfate significantly.
Description
Technical field
The utility model relates to a kind of devices explosion-proof for π type boiler the ball type pulverizer system.
Background technique
Due to the sharp increase of electric coal demand, coal price Continued, in order to ensure the normal operation of unit and drop this detraction,
Large-scale power station, which starts to mix, at present burns the higher lignite of part volatile matter, the design value of volatile matter substantial deviation boiler design coal,
Pulverized coal preparation system spontaneous combustion and explosion frequently are caused, especially grinds the ball type pulverizer system of high volatile lignite, safety accident is more
To be frequent and prominent, therefore the ball type pulverizer system always exists the security risk of explosion, becomes long-standing problem power plant safety fortune
Capable technical problem.
Pulverized coal preparation system explosion-proof means in the country's are relatively simple at present, are essentially all such as to be applied using temperature controlled method
Number be 201520821907.4 Chinese patent, control point include pulverizer outlet temperature control and middle storage coal-grinding powder cabin temperature control
System, but this explosion prevention controlling process has the following problems: and 1) outlet of control coal pulverizer and powder cabin temperature are explosion-proof merely, cannot be from root
Prevention and control detonation is realized in sheet, pulverized coal preparation system coal pulverizer, which blows out, burns phenomena such as tube cell, pulverized coal bin spontaneous combustion happens occasionally；2) monitoring side
Method is single, not can be carried out early warning and automatic burst-preventing disposition；3) pulverizer outlet temperature control is lower, and it is dry both to have influenced pulverized coal preparation system
Power output, and constrain the raising of boiler efficiency.
The ball type pulverizer system equipment is various, structure is special, and pipeline is complicated, at coal pulverizer exit bend, tailing separator
At baffle, at pulverized-coal collector baffle, the easy accumulated powder of wind powder pipe elbow and flat segments etc., form flow dead zone, accumulated powder and its wave
Hair object easily glows, and leads to the generation of explosion of Coal Pulverizing System." pulverized coal preparation pulverized coal preparation system explosion -- proof regulations " are pointed out: " as long as keeping
Oxygen content concentration by volume is lower than 16% in system, then any coal is impossible to explode ".Therefore, it develops a kind of for π type
The explosion-proof device and method of boiler the ball type pulverizer system is very necessary, by O2Content control is 16% hereinafter, powder processed can be ensured
System safety operation.
Utility model content
The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and provide a kind of for π type pot
The explosion-proof device of furnace the ball type pulverizer system can reduce the oxygen amount in pulverized coal preparation system 16% hereinafter, and can reduce exhaust gas volumn
With denitration residue ammonia, air preheater is alleviated significantly because of blocking and etching problem caused by ammonium hydrogen sulfate.
The technical scheme in the invention for solving the above technical problem is: one kind is for storing up formula powder system in π type boiler
It unites explosion-proof device, which is characterized in that including run coal bin, feeder, low speed coal mill, tailing separator, pulverized-coal collector, coal
Powder cabin, mill exhauster, the side A denitrification apparatus, the side A air preheater, the side B denitrification apparatus, the side B air preheater, burner hearth, economizer, furnace cigarette blower,
Hot fume electromagnetism main valve, computer, furnace cigarette general pipeline and oxygen analyzer；The run coal bin, feeder, low speed coal mill, coarse powder
Separator, pulverized-coal collector and pulverized coal bin are sequentially connected, and the import of the mill exhauster connects with pulverized-coal collector and pulverized coal bin respectively
It connects, the outlet of the mill exhauster and the outlet of pulverized coal bin are connect with burner hearth, and the burner hearth tail portion is disposed with economizer, the burner hearth
It is connect respectively with the side A denitrification apparatus and the side B denitrification apparatus, the side A denitrification apparatus is connected with the side A air preheater, the side B denitration
Device is connected with the side B air preheater；The side A denitrification apparatus and the side B denitrification apparatus are also connect with furnace cigarette general pipeline respectively, the furnace cigarette
Furnace cigarette blower and hot fume electromagnetism main valve are provided on general pipeline, the furnace cigarette general pipeline is connect with low speed coal mill, cold wind import with
Furnace cigarette general pipeline connection；The pulverized-coal collector is connect with mill exhauster by lack of gas pipeline, and the oxygen analyzer is arranged in lack of gas
On pipeline；The hot fume electromagnetism main valve and oxygen analyzer are connect with computer.
Furthermore, the side A denitrification apparatus is connect with the side A air preheater by the side A denitration outlet flue, described
The side B denitrification apparatus is connected with the side B air preheater by the side B denitration outlet flue；The side the A denitration outlet flue and furnace
It is provided with the side A flue gas on the pipeline that cigarette general pipeline is connected and takes out pipe solenoid valve, the side the B denitration outlet flue and furnace cigarette general pipeline
It is provided with the side B flue gas on the pipeline being connected and takes out pipe solenoid valve；The side A flue gas takes out pipe solenoid valve and the side B flue gas takes out pipe electromagnetism
Valve is connect with computer.
Furthermore, the furnace cigarette general pipeline is connected to by cigarette wind mixing duct with low speed coal mill, the cold wind import
It is connected to by cold air duct with cigarette wind mixing duct, cold wind solenoid valve, the cold wind solenoid valve is provided on the cold air duct
It is connect with computer.
Furthermore, the blade material of the furnace cigarette blower is 12Cr1MoV, and surface spraying weld has carbide alloy of nickel-base
Layer, for enhancing abrasionproof performance.
The working method of the above-mentioned device explosion-proof for π type boiler the ball type pulverizer system is as follows:
Step 1: the flue-gas temperature of the side A denitration outlet flue and the side B denitration outlet flue is 300 DEG C ~ 360
DEG C, oxygen amount is aspirated through furnace cigarette blower for the flue gas of the side 6% ~ 7%, A denitration outlet flue and the side B denitration outlet flue and is risen
Being dried and conveying to coal dust into low speed coal mill together is mixed after pressure with the cold wind of cold wind import；
Step 2: hot stove cigarette and cold wind are mixed by different proportion, obtain suitable smoke temperature and successively pass through low speed coal mill,
The exhaust of lack of gas and pulverized coal bin that tailing separator and pulverized-coal collector, pulverized-coal collector and pulverized coal bin are isolated enters together
Mill exhauster, pulverized coal conveying enters hearth combustion after boosting；
Step 3: the flue gas that burner hearth generates first passes around economizer, it is successively empty pre- by the side A denitrification apparatus and the side A later
Device finally passes through the side A exhanst gas outlet；Or successively pass through the side B denitrification apparatus and the side B air preheater, finally enter the side B exhanst gas outlet.
Furthermore, the flue gas flow in the furnace cigarette general pipeline is controlled by hot fume electromagnetism main valve.
Furthermore, the oxygen analyzer is used for weight for detecting oxygen amount in lack of gas pipeline, oxygen amount detected value
True oxygen amount in powder system.
Furthermore, the hot fume electromagnetism main valve, cold wind solenoid valve, the side A flue gas take out pipe solenoid valve, the side B flue gas is taken out
Pipe solenoid valve and oxygen analyzer are connect with computer, by oxygen amount detected value size and pulverized coal preparation system temperature conditions, rationally
Corresponding electromagnetic valve aperture is adjusted, the ratio of hot stove cigarette and cold wind is changed, by oxygen amount and temperature control within safe range.
The utility model compared with prior art, has the following advantages that and effect:
1) the utility model uses furnace cigarette blower, the hot stove cigarette that SCR denitration device exports is pumped out after mixing with cold wind
It is sent into coal pulverizer inlet, reduces the oxygen amount in pulverized coal preparation system 16% hereinafter, hot stove cigarette substitutes heated-air drying coal dust simultaneously.
2) oxygen analyzer of the utility model can detect pulverized coal preparation system oxygen amount automatically, computer fluctuated according to oxygen amount and
When adjustment hot fume electromagnetism main valve, cold wind solenoid valve, the side A flue gas take out pipe solenoid valve, the side B flue gas take out pipe electromagnetism valve opening, carry out
Full-automatic explosion-proof regulation.
3) the utility model extracts flue gas from SCR denitration device and air preheater intermediate flue position, it is possible to reduce exhaust gas volumn
With denitration residue ammonia, air preheater is alleviated significantly because of blocking and etching problem caused by ammonium hydrogen sulfate, and can be further
Reduce pulverized coal preparation system oxygen amount.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment.
In figure: run coal bin 1, feeder 2, low speed coal mill 3, tailing separator 4, pulverized-coal collector 5, pulverized coal bin 6, row's powder
Machine 7, the side A denitrification apparatus 8, the side A air preheater 9, the side B denitrification apparatus 10, the side B air preheater 11, burner hearth 12, economizer 13, furnace cigarette wind
Machine 14, hot fume electromagnetism main valve 15, computer 16, furnace cigarette general pipeline 17, cold wind solenoid valve 18, cold wind import 19, the side A exhanst gas outlet
20, the side B exhanst gas outlet 21, oxygen analyzer 22, cold air duct 23, coal breakage pipeline 24, cigarette wind mixing duct 25, powder retrieving pipe 26,
Coal pulverizer exports tube cell 27, outlet of coarse powder separating device tube cell 28, lack of gas pipeline 29, moisture absorption pipe 30, the side A denitration outlet flue
81, the side B denitration outlet flue 82, the side A flue gas take out pipe solenoid valve 91, the side B flue gas takes out pipe solenoid valve 92.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
Referring to Fig. 1, in the present embodiment for the explosion-proof device of π type boiler the ball type pulverizer system, including run coal bin 1,
Feeder 2, low speed coal mill 3, tailing separator 4, pulverized-coal collector 5, pulverized coal bin 6, mill exhauster 7, the side A denitrification apparatus 8, the side A
Air preheater 9, the side B denitrification apparatus 10, the side B air preheater 11, burner hearth 12, economizer 13, furnace cigarette blower 14, hot fume electromagnetism main valve
15, computer 16, furnace cigarette general pipeline 17 and oxygen analyzer 22.
Run coal bin 1, feeder 2, low speed coal mill 3, tailing separator 4, pulverized-coal collector 5 and pulverized coal bin 6 are sequentially connected,
The import of mill exhauster 7 is connect with pulverized-coal collector 5 and pulverized coal bin 6 respectively, the outlet of mill exhauster 7 and outlet and the furnace of pulverized coal bin 6
Thorax 12 connects, and 12 tail portion of burner hearth is disposed with economizer 13, and burner hearth 12 connects with the side A denitrification apparatus 8 and the side B denitrification apparatus 10 respectively
It connects, the side A denitrification apparatus 8 and the side A air preheater 9 connect, and the side B denitrification apparatus 10 and the side B air preheater 11 connect；8 He of the side A denitrification apparatus
The side B denitrification apparatus 10 is also connect with furnace cigarette general pipeline 17 respectively, and furnace cigarette blower 14 and hot fume electromagnetism are provided on furnace cigarette general pipeline 17
Main valve 15, furnace cigarette general pipeline 17 are connect with low speed coal mill 3, and cold wind import 19 is connected to furnace cigarette general pipeline 17；Pulverized-coal collector 5 and row
Powder machine 7 is connected by lack of gas pipeline 29, and oxygen analyzer 22 is arranged on lack of gas pipeline 29；Hot fume electromagnetism main valve 15 and oxygen amount
Analyzer 22 is connect with computer 16.
The side A denitrification apparatus 8 is connect with the side A air preheater 9 by the side A denitration outlet flue 81,10 He of the side B denitrification apparatus
The side B air preheater 11 is connected by the side B denitration outlet flue 82；17 phase of the side A denitration outlet flue 81 and furnace cigarette general pipeline
It is provided with the side A flue gas on the pipeline of connection and takes out pipe solenoid valve 91, the side B denitration outlet flue 82 is connected with furnace cigarette general pipeline 17
Pipeline on be provided with the side B flue gas take out pipe solenoid valve 92；The side A flue gas takes out pipe solenoid valve 91 and the side B flue gas takes out pipe solenoid valve 92
It is connect with computer 16.
Furnace cigarette general pipeline 17 is connected to by cigarette wind mixing duct 25 with low speed coal mill 3, and cold wind import 19 passes through cold air duct
23 are connected to cigarette wind mixing duct 25, and cold wind solenoid valve 18, cold wind solenoid valve 18 and computer 16 are provided on cold air duct 23
Connection.
The blade material of furnace cigarette blower 14 is 12Cr1MoV, and surface spraying weld has carbide alloy of nickel-base layer, anti-for enhancing
Grind performance.
The working method of the device explosion-proof for π type boiler the ball type pulverizer system is as follows:
Step 1: the flue-gas temperature of the side A denitration outlet flue 81 and the side B denitration outlet flue 82 be 300 DEG C ~
360 DEG C, oxygen amount is the flue gas of the side 6% ~ 7%, A denitration outlet flue 81 and the side B denitration outlet flue 82 through furnace cigarette wind
Machine 14 suction boosting after mix with the cold wind of cold wind import 19 together enter low speed coal mill 3 to coal dust be dried with it is defeated
It send；
Step 2: hot stove cigarette and cold wind are mixed by different proportion, suitable smoke temperature is obtained and successively by low speed coal mill
3, the exhaust of lack of gas and pulverized coal bin 6 that tailing separator 4 and pulverized-coal collector 5, pulverized-coal collector 5 and pulverized coal bin 6 are isolated
Enter mill exhauster 7 together, pulverized coal conveying enters the burning of burner hearth 12 after boosting；
Step 3: the flue gas that burner hearth 12 generates first passes around economizer 13, successively pass through the side A denitrification apparatus 8 and the side A later
Air preheater 9 finally passes through the side A exhanst gas outlet 20；Or successively pass through the side B denitrification apparatus 10 and the side B air preheater 11, finally enter B
Side exhanst gas outlet 21.
Flue gas flow in furnace cigarette general pipeline 17 is controlled by hot fume electromagnetism main valve 15；Oxygen analyzer 22 is for examining
Oxygen amount in lack of gas pipeline 29 is surveyed, oxygen amount detected value is for measuring true oxygen amount in pulverized coal preparation system.
Hot fume electromagnetism main valve 15, cold wind solenoid valve 18, the side A flue gas take out pipe solenoid valve 91, the side B flue gas takes out pipe solenoid valve 92
It connect with computer 16 with oxygen analyzer 22, by oxygen amount detected value size and pulverized coal preparation system temperature conditions, reasonably adjusts
Corresponding electromagnetic valve aperture, changes the ratio of hot stove cigarette and cold wind, by oxygen amount and temperature control within safe range.
Although the utility model is disclosed as above with embodiment, its protection scope being not intended to limit the utility model,
Any technical staff for being familiar with this technology, it is made in the conception and scope for not departing from the utility model to change and retouch,
It all should belong to the protection range of the utility model.
Claims (4)
1. a kind of device explosion-proof for π type boiler the ball type pulverizer system, which is characterized in that including run coal bin (1), feeder
(2), low speed coal mill (3), tailing separator (4), pulverized-coal collector (5), pulverized coal bin (6), mill exhauster (7), the side A denitrification apparatus
(8), the side A air preheater (9), the side B denitrification apparatus (10), the side B air preheater (11), burner hearth (12), economizer (13), furnace cigarette blower
(14), hot fume electromagnetism main valve (15), computer (16), furnace cigarette general pipeline (17) and oxygen analyzer (22)；The run coal bin
(1), feeder (2), low speed coal mill (3), tailing separator (4), pulverized-coal collector (5) and pulverized coal bin (6) are sequentially connected, institute
The import for stating mill exhauster (7) is connect with pulverized-coal collector (5) and pulverized coal bin (6) respectively, the outlet of the mill exhauster (7) and coal dust
The outlet in storehouse (6) is connect with burner hearth (12), and burner hearth (12) tail portion is disposed with economizer (13), the burner hearth (12) respectively with
The side A denitrification apparatus (8) and the side B denitrification apparatus (10) connection, the side A denitrification apparatus (8) and the side A air preheater (9) connection, it is described
The side B denitrification apparatus (10) and the side B air preheater (11) connection；The side A denitrification apparatus (8) and the side B denitrification apparatus (10) are also distinguished
It is connect with furnace cigarette general pipeline (17), is provided with furnace cigarette blower (14) and hot fume electromagnetism main valve (15) on the furnace cigarette general pipeline (17),
The furnace cigarette general pipeline (17) connect with low speed coal mill (3), and cold wind import (19) is connected to furnace cigarette general pipeline (17)；The fine powder point
It is connect with mill exhauster (7) by lack of gas pipeline (29) from device (5), the oxygen analyzer (22) is arranged in lack of gas pipeline (29)
On；The hot fume electromagnetism main valve (15) and oxygen analyzer (22) are connect with computer (16).
2. the device explosion-proof for π type boiler the ball type pulverizer system according to claim 1, which is characterized in that the A
Side denitrification apparatus (8) is connect with the side A air preheater (9) by the side A denitration outlet flue (81), the side B denitrification apparatus
(10) it is connected with the side B air preheater (11) by the side B denitration outlet flue (82)；The side the A denitration outlet flue
(81) it is provided with the side A flue gas on the pipeline being connected with furnace cigarette general pipeline (17) and takes out pipe solenoid valve (91), the side B denitrification apparatus goes out
It is provided with the side B flue gas on the pipeline that mouth flue (82) is connected with furnace cigarette general pipeline (17) and takes out pipe solenoid valve (92)；The side A flue gas
It takes out pipe solenoid valve (91) and the side B flue gas is taken out pipe solenoid valve (92) and connect with computer (16).
3. the device explosion-proof for π type boiler the ball type pulverizer system according to claim 1, which is characterized in that described
Furnace cigarette general pipeline (17) is connected to by cigarette wind mixing duct (25) with low speed coal mill (3), and the cold wind import (19) passes through cold wind
Pipeline (23) is connected to cigarette wind mixing duct (25), is provided with cold wind solenoid valve (18) on the cold air duct (23), described cold
Wind-powered electricity generation magnet valve (18) is connect with computer (16).
4. the device explosion-proof for π type boiler the ball type pulverizer system according to claim 1, which is characterized in that described
The blade material of furnace cigarette blower (14) is 12Cr1MoV, and surface spraying weld has carbide alloy of nickel-base layer, for enhancing abrasionproof performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821442517.6U CN209147133U (en) | 2018-09-04 | 2018-09-04 | A kind of device explosion-proof for π type boiler the ball type pulverizer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821442517.6U CN209147133U (en) | 2018-09-04 | 2018-09-04 | A kind of device explosion-proof for π type boiler the ball type pulverizer system |
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| CN209147133U true CN209147133U (en) | 2019-07-23 |
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ID=67266803
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821442517.6U Active CN209147133U (en) | 2018-09-04 | 2018-09-04 | A kind of device explosion-proof for π type boiler the ball type pulverizer system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210562A (en) * | 2018-09-04 | 2019-01-15 | 华电电力科学研究院有限公司 | A kind of device and its working method explosion-proof for π type boiler the ball type pulverizer system |
-
2018
- 2018-09-04 CN CN201821442517.6U patent/CN209147133U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210562A (en) * | 2018-09-04 | 2019-01-15 | 华电电力科学研究院有限公司 | A kind of device and its working method explosion-proof for π type boiler the ball type pulverizer system |
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