CN108592076B - Injection type coal, pulverulent fuel mixer and coal dust mixed method with negative pressure regulatory function - Google Patents
Injection type coal, pulverulent fuel mixer and coal dust mixed method with negative pressure regulatory function Download PDFInfo
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- CN108592076B CN108592076B CN201810281800.3A CN201810281800A CN108592076B CN 108592076 B CN108592076 B CN 108592076B CN 201810281800 A CN201810281800 A CN 201810281800A CN 108592076 B CN108592076 B CN 108592076B
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- negative pressure
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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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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Abstract
The invention discloses the injection type coal, pulverulent fuel mixers with negative pressure regulatory function, including powder sinking tube and with the integrally formed mixing bunker of powder sinking tube, the top of powder sinking tube is equipped with negative pressure adjusting device, negative pressure adjusting device includes the installation cylinder for passing through flanged joint with powder sinking tube, the side wall for installing cylinder is equipped with surge bunker closed at both ends, it is located at one end inside mounting cylinder body on surge bunker and is equipped with air inlet, the inside of surge bunker is equipped with the piston to match with air inlet, the end of piston is connected by spring with the spring fixed column being located on surge bunker inner wall, the upper surface of piston is equipped with bott stick, the top of surge bunker is equipped with the air inlet pipe being connected with gas supply mechanism, the initial position of bott stick and the position of air inlet pipe it is corresponding and be in close contact, one end of mixing bunker is connected with even speed tube, the other end of mixing bunker is equipped with high pressure carrier gas spray head.The present invention can automatically adjust the pressure at the top of powder sinking tube, and avoiding cannot smoothly fall when coal dust enters powder sinking tube because overpressure is too big.
Description
Technical field
The present invention relates to a kind of injection type coal, pulverulent fuel mixer and coal dust mixed method with negative pressure regulatory function, belongs to pot
Furnace parts technical field.
Background technique
Coal, pulverulent fuel mixer is also known as air and powder mixer, and working is that the coal dust for being sent into pulverizer coal feeder is sufficiently mixed with powder feeding air-flow
Afterwards, it is sent into furnace and participates in burning, good coal, pulverulent fuel mixer should ensure that the coal dust under pulverizer coal feeder is continuous through powder sinking tube, uniform
Primary air piping is fallen into, uniform wind powder mixture is formed, is sent into burner hearth, the composition of coal, pulverulent fuel mixer mainly includes mixing chamber and falls
Tube cell constructs relatively easy, an only component of very little in the boiler, but plays in boiler combustion system key
Effect, performance it is fine or not, structurally reasonable whether directly affect burning quality, and then influence boiler it is normal, stablize fortune
Row.Current coal, pulverulent fuel mixer is often because the primary air duct of pulverized coal conveying is longer, it is desirable that is formed in mixer relatively high
Negative pressure disturbs and gives powdery state, or even the phenomenon that powder-feeding amount is unable to control occurs, and seriously affects the operation of boiler.For this purpose, we
It is proposed a kind of injection type coal, pulverulent fuel mixer and coal dust mixed method with negative pressure regulatory function.
Summary of the invention
The main purpose of the present invention is to provide a kind of injection type coal, pulverulent fuel mixers and coal dust with negative pressure regulatory function
Mixed method can automatically adjust the pressure at the top of powder sinking tube, avoid when coal dust enters powder sinking tube due to overpressure is too big
It cannot smoothly fall, can effectively solve the problems in background technique.
To achieve the above object, the technical scheme adopted by the invention is as follows:
Injection type coal, pulverulent fuel mixer with negative pressure regulatory function, including powder sinking tube and with powder sinking tube is integrally formed mixes
The top in storehouse, the powder sinking tube is equipped with negative pressure adjusting device, and the negative pressure adjusting device includes passing through flanged joint with powder sinking tube
Installation cylinder, the side wall of the installation cylinder is equipped with surge bunker closed at both ends, is located in mounting cylinder body on the surge bunker
The one end in portion is equipped with air inlet, and the inside of surge bunker is equipped with the piston to match with air inlet, and the end of the piston passes through bullet
Spring is connected with the spring fixed column being located on surge bunker inner wall, and the upper surface of piston is equipped with bott stick, the top of the surge bunker
Equipped with the air inlet pipe being connected with gas supply mechanism, the initial position of the bott stick and the position of air inlet pipe are corresponding and closely connect
Touching, one end of the mixing bunker are connected with even speed tube, and the other end of mixing bunker is equipped with high pressure carrier gas spray head.
Further, the upper and lower surface of the piston is equipped with support rod, and the end of the support rod is equipped with boss slider, institute
State that sliding block is chimeric to be mounted in the sliding slot on the upper and lower inner wall of surge bunker.
Further, manual lever is additionally provided on the piston.
Further, the diminishing coal dust channel of internal diameter from top to bottom is equipped with inside the powder sinking tube.
Further, the mixing bunker is tilted is equipped with crash panel, and the high pressure carrier gas spray head crosses crash panel.
Further, the arc discharge port being connected with even speed tube is equipped in the mixing bunker, the discharge outlet is equipped with
Baffle, the baffle are equipped with automatic-opening mechanism and limit plate.
Further, the automatic-opening mechanism includes being set to mixing bunker inner column, is socketed with moving cylinder on the column,
The moving cylinder is connected by the spring being socketed on outside column with baffle bottom, and the bottom of the moving cylinder passes through gas-guide tube and height
Ballast gas nozzle is connected.
The present invention also provides a kind of coal dust mixed methods, using the coal, pulverulent fuel mixer described in claim 1~7, including such as
Lower step:
(1) coal dust enters mixing bunker by installation cylinder after powder sinking tube, starts high pressure carrier gas spray head, coal dust and air mixed
It closes and is sufficiently mixed in storehouse；
(2) mixed coal dust is delivered in burner hearth by even speed tube.
Further, the pressure of the high pressure carrier gas spray head is 0.5MPa, and the temperature of the air is 120 DEG C.
The present invention is equipped with negative pressure adjusting device at the top of powder sinking tube, when the pressure in powder sinking tube is too big, due to pressure
Difference, piston is to movement on the right side of surge bunker, while bott stick also moves to the right, makes to generate gap between air inlet pipe and blocking pipe,
Gas enters surge bunker and enters in mounting cylinder body through air inlet, and the pressure at the top of powder sinking tube is made to reach balance, and coal dust can be smoothly
It falls into mixing bunker, while piston homing under the action of the spring, bott stick also homing.The present invention can adjust automatically
The pressure at the top of powder sinking tube is saved, avoiding cannot smoothly fall when coal dust enters powder sinking tube because overpressure is too big.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structure enlargement diagram in Fig. 1 of the present invention at A；
Fig. 3 is the structure enlargement diagram in Fig. 1 of the present invention at B.
In figure: 1, even speed tube；2, arc discharge port；3, baffle；4, limit plate；5, coal dust channel；6, cylinder is installed；7, it falls
Tube cell；8, high pressure carrier gas spray head；9, mixing bunker；10, gas-guide tube；11, crash panel；12, spring；13, column；14, moving cylinder；
15, piston；16, surge bunker；17, boss slider；18, sliding slot；19, manual lever；20, spring fixed column；21, support rod；
22, air inlet pipe；23, bott stick.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
As shown in Figures 1 to 3, the present embodiment provides a kind of injection type coal, pulverulent fuel mixers with negative pressure regulatory function, including
Powder sinking tube and with the integrally formed mixing bunker of powder sinking tube, the top of the powder sinking tube is equipped with negative pressure adjusting device, the negative pressure tune
Regulating device includes the installation cylinder for passing through flanged joint with powder sinking tube, and the side wall of the installation cylinder is equipped with adjusting closed at both ends
Storehouse is located at one end inside mounting cylinder body on the surge bunker and is equipped with air inlet, and the inside of surge bunker is equipped with and air inlet phase
The end of the piston matched, the piston is connected by spring with the spring fixed column being located on surge bunker inner wall, the upper table of piston
Face is equipped with bott stick, and the top of the surge bunker is equipped with the air inlet pipe being connected with gas supply mechanism, the initial position of the bott stick
And close contact, one end of the mixing bunker corresponding with the position of air inlet pipe are connected with even speed tube, and the other end of mixing bunker is set
There is high pressure carrier gas spray head.
It is equipped with negative pressure adjusting device at the top of powder sinking tube, when the pressure in powder sinking tube is too big, due to pressure difference, piston
It is mobile on the right side of to surge bunker, while bott stick also moves to the right, makes to generate gap between air inlet pipe and blocking pipe, gas enters
Surge bunker enters in mounting cylinder body through air inlet, and the pressure at the top of powder sinking tube is made to reach balance, and coal dust can smoothly fall into mixing
In storehouse, while piston homing under the action of the spring, bott stick also homing.
Further, the upper and lower surface of the piston is equipped with support rod, and the end of the support rod is equipped with boss slider, institute
State that sliding block is chimeric to be mounted in the sliding slot on the upper and lower inner wall of surge bunker.
Sliding block horizontally slips along sliding slot, and band piston is mobile.
Further, manual lever is additionally provided on the piston.
When coal dust channel blocks, the pressure in coal dust channel can be increased, coal is made by pulling manual lever
Powder smoothly falls, and prevents coal dust channel from blocking.
Further, the diminishing coal dust channel of internal diameter from top to bottom is equipped with inside the powder sinking tube.
Slow down the falling speed of coal dust.
Further, the mixing bunker is tilted is equipped with crash panel, and the high pressure carrier gas spray head crosses crash panel.
Coal dust enters mixing bunker and spreads out after impaction plates, can preferably mix with air.
Further, the arc discharge port being connected with even speed tube is equipped in the mixing bunker, the discharge outlet is equipped with
Baffle, the baffle are equipped with automatic-opening mechanism and limit plate.
When automatic-opening mechanism jacks up baffle, the mixture of coal dust and air can just enter even speed tube, this process
The time is needed, the incorporation time of coal dust and air, good mixing effect can be extended.
Further, the automatic-opening mechanism includes being set to mixing bunker inner column, is socketed with moving cylinder on the column,
The moving cylinder is connected by the spring being socketed on outside column with baffle bottom, and the bottom of the moving cylinder passes through gas-guide tube and height
Ballast gas nozzle is connected.
Gas in gas-guide tube jacks up moving cylinder, and moving cylinder under the action of the spring jacks up baffle, opens arc and goes out
Material mouth.
The present invention also provides a kind of coal dust mixed methods, using the coal, pulverulent fuel mixer described in claim 1~7, including such as
Lower step:
(1) coal dust enters mixing bunker by installation cylinder after powder sinking tube, starts high pressure carrier gas spray head, coal dust and air mixed
It closes and is sufficiently mixed in storehouse；
(2) mixed coal dust is delivered in burner hearth by even speed tube.
Further, the pressure of the high pressure carrier gas spray head is 0.5MPa, and the temperature of the air is 120 DEG C.
It is above that certain exemplary embodiments of the invention are only described by way of explanation, undoubtedly, for ability
The those of ordinary skill in domain without departing from the spirit and scope of the present invention can be with a variety of different modes to institute
The embodiment of description is modified.Therefore, above-mentioned attached drawing and description are regarded as illustrative in nature, and should not be construed as to the present invention
The limitation of claims.
Claims (9)
1. the injection type coal, pulverulent fuel mixer with negative pressure regulatory function, including powder sinking tube and with powder sinking tube is integrally formed mixes
Storehouse, it is characterised in that: the top of the powder sinking tube is equipped with negative pressure adjusting device, and the negative pressure adjusting device includes logical with powder sinking tube
The installation cylinder of flanged joint is crossed, the side wall of the installation cylinder is equipped with surge bunker closed at both ends, is located on the surge bunker
The one end for installing inner barrel is equipped with air inlet, and the inside of surge bunker is equipped with the piston to match with air inlet, the piston
End is connected by spring with the spring fixed column being located on surge bunker inner wall, and the upper surface of piston is equipped with bott stick, the tune
The top in section storehouse is equipped with the air inlet pipe being connected with gas supply mechanism, and the initial position of the bott stick and the position of air inlet pipe are corresponding
And be in close contact, one end of the mixing bunker is connected with even speed tube, and the other end of mixing bunker is equipped with high pressure carrier gas spray head, works as powder falling
When pressure in pipe is too big, due to pressure difference, piston is to mobile on the right side of surge bunker, while bott stick also moves to the right, make into
Gap is generated between tracheae and blocking pipe, gas enters surge bunker and enters in mounting cylinder body through air inlet, makes at the top of powder sinking tube
Pressure reaches balance, and coal dust can smoothly be fallen into mixing bunker, while piston homing under the action of the spring, bott stick
Homing.
2. a kind of injection type coal, pulverulent fuel mixer with negative pressure regulatory function according to claim 1, it is characterised in that: institute
The upper and lower surface for stating piston is equipped with support rod, and the end of the support rod is equipped with boss slider, and chimeric be mounted on of the sliding block sets
In in the sliding slot on the upper and lower inner wall of surge bunker.
3. a kind of injection type coal, pulverulent fuel mixer with negative pressure regulatory function according to claim 1, it is characterised in that: institute
It states and is additionally provided with manual lever on piston.
4. the injection type coal, pulverulent fuel mixer according to claim 1 with negative pressure regulatory function, it is characterised in that: described to fall
The diminishing coal dust channel of internal diameter from top to bottom is equipped with inside tube cell.
5. a kind of injection type coal, pulverulent fuel mixer with negative pressure regulatory function according to claim 1, it is characterised in that: institute
It is tilted equipped with crash panel to state mixing bunker, the high pressure carrier gas spray head crosses crash panel.
6. a kind of injection type coal, pulverulent fuel mixer with negative pressure regulatory function according to claim 1, it is characterised in that: institute
The arc discharge port for being equipped in mixing bunker and being connected with even speed tube is stated, the discharge outlet is equipped with baffle, and the baffle is equipped with
Automatic-opening mechanism and limit plate.
7. a kind of injection type coal, pulverulent fuel mixer with negative pressure regulatory function according to claim 6, it is characterised in that: institute
Stating automatic-opening mechanism includes being set to mixing bunker inner column, is socketed with moving cylinder on the column, the moving cylinder passes through socket
It is connected in the spring outside column with baffle bottom, the bottom of the moving cylinder is connected by gas-guide tube with high pressure carrier gas spray head.
8. a kind of coal dust mixed method, it is characterised in that: using coal, pulverulent fuel mixer described in claim 1 ~ 7, including walk as follows
It is rapid:
(1) coal dust enters mixing bunker by installation cylinder after powder sinking tube, starts high pressure carrier gas spray head, coal dust and air are in mixing bunker
Inside it is sufficiently mixed；
(2) mixed coal dust is delivered in burner hearth by even speed tube.
9. a kind of coal dust mixed method according to claim 8, it is characterised in that: the pressure of the high pressure carrier gas spray head is
0.5MPa, the temperature of the air are 120 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810281800.3A CN108592076B (en) | 2018-04-02 | 2018-04-02 | Injection type coal, pulverulent fuel mixer and coal dust mixed method with negative pressure regulatory function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810281800.3A CN108592076B (en) | 2018-04-02 | 2018-04-02 | Injection type coal, pulverulent fuel mixer and coal dust mixed method with negative pressure regulatory function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108592076A CN108592076A (en) | 2018-09-28 |
| CN108592076B true CN108592076B (en) | 2019-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810281800.3A Active CN108592076B (en) | 2018-04-02 | 2018-04-02 | Injection type coal, pulverulent fuel mixer and coal dust mixed method with negative pressure regulatory function |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503654A (en) * | 2020-05-04 | 2020-08-07 | 盐城宝泽电力石化机械制造有限公司 | Efficient coal powder mixer and using method |
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| US4417601A (en) * | 1980-12-19 | 1983-11-29 | National Foam Systems, Inc. | Variable proportioning valve for balanced pressure proportioning systems, and system containing the valve |
| JPH1061909A (en) * | 1996-08-22 | 1998-03-06 | Mitsubishi Heavy Ind Ltd | Coal supply pipe |
| US5771823A (en) * | 1996-01-31 | 1998-06-30 | Aep Resources Service Company | Method and apparatus for reducing NOx emissions from a multiple-intertube pulverized-coal burner |
| CN203307353U (en) * | 2013-06-15 | 2013-11-27 | 启东市冶金机械有限公司 | Pulverized coal conveying adjuster |
| CN204165070U (en) * | 2014-08-26 | 2015-02-18 | 山西蓝天环保设备有限公司 | With the injection type coal, pulverulent fuel mixer of negative pressure regulatory function |
| CN205002148U (en) * | 2015-08-27 | 2016-01-27 | 武汉燃控科技热能工程有限公司 | Wind powder blender |
-
2018
- 2018-04-02 CN CN201810281800.3A patent/CN108592076B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4417601A (en) * | 1980-12-19 | 1983-11-29 | National Foam Systems, Inc. | Variable proportioning valve for balanced pressure proportioning systems, and system containing the valve |
| US5771823A (en) * | 1996-01-31 | 1998-06-30 | Aep Resources Service Company | Method and apparatus for reducing NOx emissions from a multiple-intertube pulverized-coal burner |
| JPH1061909A (en) * | 1996-08-22 | 1998-03-06 | Mitsubishi Heavy Ind Ltd | Coal supply pipe |
| CN203307353U (en) * | 2013-06-15 | 2013-11-27 | 启东市冶金机械有限公司 | Pulverized coal conveying adjuster |
| CN204165070U (en) * | 2014-08-26 | 2015-02-18 | 山西蓝天环保设备有限公司 | With the injection type coal, pulverulent fuel mixer of negative pressure regulatory function |
| CN205002148U (en) * | 2015-08-27 | 2016-01-27 | 武汉燃控科技热能工程有限公司 | Wind powder blender |
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| 中储式制粉系统锅炉向邻炉输粉方案;肖体良;《动力工程技术》;20171231;第22卷(第6期);第46-49页 |
| 可调整锅炉煤粉混合器的设想;李宁;《设计技术》;19931231;第1-2页 |
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| CN108592076A (en) | 2018-09-28 |
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