CN107537335A - A kind of nozzle, blender and feeding system - Google Patents
A kind of nozzle, blender and feeding system Download PDFInfo
- Publication number
- CN107537335A CN107537335A CN201710936533.4A CN201710936533A CN107537335A CN 107537335 A CN107537335 A CN 107537335A CN 201710936533 A CN201710936533 A CN 201710936533A CN 107537335 A CN107537335 A CN 107537335A
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- China
- Prior art keywords
- nozzle
- fluid
- main channel
- blender
- regulating valve
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- 239000012530 fluid Substances 0.000 claims abstract description 86
- 230000001105 regulatory effect Effects 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000002817 coal dust Substances 0.000 claims description 18
- 230000008602 contraction Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 9
- 239000003245 coal Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229940098458 powder spray Drugs 0.000 description 1
Landscapes
- Accessories For Mixers (AREA)
- Nozzles (AREA)
Abstract
The present invention relates to technical field of combustion equipment, more particularly to a kind of nozzle, blender and feeding system.Wherein, nozzle includes main channel, some circular passages, some communicating pipes and regulating valve, and the cross-sectional area of the fluid intake of nozzle is more than the cross-sectional area of the fluid issuing of nozzle.The present invention is more than the cross-sectional area of fluid issuing by the cross-sectional area of fluid intake, for forming pressure difference in fluid outlet；Main channel is included by nozzle and some circular passages are arranged on the outside of main channel, one end that circular passage is located at the inside of nozzle is not turned on main channel, the other end and turned on outside, every circular passage is conducted with main channel respectively by communicating pipe, regulating valve is provided with every communicating pipe, the aperture of regulating valve is adjusted, realizes the stable pressure difference between the pressure of fluid outlet and atmospheric pressure, nozzle wear is solved seriously and fluid mixes uneven technical problem with material.
Description
Technical field
The present invention relates to technical field of combustion equipment, more particularly to a kind of nozzle, blender and feeding system.
Background technology
It is that the use of most of small-sized thermal power plant, central heating stations, kiln and blast furnace of material is warehouse style using coal dust
Coal dust supply system.Coal dust is sent into coal, pulverulent fuel mixer by feeding metering device from Pulverized Coal Bin by coal spout, malleation conveying
After air uniformly mixes in coal, pulverulent fuel mixer with fine coal, then it is transferred to by conveyance conduit in boiler and participates in burning.
In how to be uniformly sent into coal dust in the air stream of malleation, existing way is the difficult point of malleation coal dust conveying
Nozzle is provided with the mixer, and the bore of nozzle in the axial direction is gradually reduced, and passes through venturi principle：Reduce gas flowing
Area, gas flow rates are improved, subatmospheric environment is formed in exit, the coal dust fallen into from top relies on what is formed
Negative pressure is inhaled into air, is realized and air is more uniform mixes.
But influence of the existing nozzle due to being passed through air mass flow or follow-up mixed gas supply inside it, often
Negative pressure caused by nozzle exit (pressure is less than atmospheric pressure) can be caused excessive, or (pressure is higher than air to generation pressure-fired
Pressure).When negative pressure (pressure difference with atmospheric pressure) is excessive, it will cause serious wear at nozzle；When producing pressure-fired, from top
Support powder phenomenon occurs in the coal dust fallen, and coal dust can fall when only adding up to a certain extent and be mixed with air, but
It is that this is unfavorable for coal dust and mixed with the uniform of air.
The content of the invention
In view of this, first purpose of the invention is to propose a kind of nozzle, for realizing that nozzle exit keeps steady
Level pressure is poor, reduces the abrasion of nozzle.
To use following technical scheme up to this purpose, the present invention：
A kind of nozzle, the cross-sectional area of the fluid intake of the nozzle are more than the cross section of the fluid issuing of the nozzle
Product, the nozzle include：
Main channel；
Some circular passages, are set in the outside of the main channel, and the circular passage is located at the inside of the nozzle
One end is not turned on the main channel, the other end and turned on outside；
Some communicating pipes, every circular passage are conducted with the main channel respectively by the communicating pipe；And
Regulating valve, it is arranged on every communicating pipe, by adjusting the aperture of the regulating valve, realizes that the fluid goes out
Pressure at mouthful and the stable pressure difference between atmospheric pressure.
Further, the nozzle also includes：
Sensor, the fluid outlet is arranged on, for detecting the pressure difference of the fluid outlet；And
Controller, electrically connected respectively with the regulating valve and the sensor, for receiving the pressure of the sensor feedback
Poor information, and for adjusting the aperture of the regulating valve, stable pressure difference can be realized in the fluid outlet.
Further, the main channel is revolving body, and the advection portion that each circular passage includes being connected is with shrinking
Portion, centerline dip of direction of the contraction flow region along the flow of fluid towards the main channel.
Further, the fluid is liquid or gas.
Second object of the present invention is to propose a kind of blender, for solve wherein fluid mix with material it is uneven
The problem of.
To use following technical scheme up to this purpose, the present invention：
A kind of blender, including：
Nozzle as described above；
Enter fluid hose, one end that the fluid intake is provided with the nozzle is connected；
Feed space, the inner chamber of the feed space are connected with the fluid issuing, are offered on the feed space for thing
Expect the charging aperture launched, the position of the charging aperture is higher than the fluid issuing.
Further, the nozzle is arranged in the side wall of the feed space, the side wall and the bottom plate of the feed space
It is connected by the deflector being obliquely installed, the deflector is located at the lower section of the nozzle.
Further, flange is provided with the periphery of the nozzle, the nozzle is mutually fixed by flange and the side wall.
Further, the main body of the feed space is cuboid.
Further, the fluid is air, and the material is coal dust.
The third object of the present invention is to propose a kind of feeding system, for solve Coal powder spray feed and combustion instability,
The problem of high energy consumption.
To use following technical scheme up to this purpose, the present invention：
A kind of feeding system, including blender as described above.
Beneficial effects of the present invention are：
Nozzle provided by the invention includes main channel, some circular passages, some communicating pipes and regulating valve, the fluid of nozzle
The cross-sectional area of entrance is more than the cross-sectional area of the fluid issuing of nozzle.Fluid issuing is more than by the cross-sectional area of fluid intake
Cross-sectional area, for fluid outlet formed pressure difference；If main channel is included by nozzle and is arranged on the outside of main channel
Dry circular passage, one end that circular passage is located at the inside of nozzle are not turned on main channel, the other end and turned on outside, every ring
Shape passage is conducted with main channel respectively by communicating pipe, and regulating valve is provided with every communicating pipe, adjusts opening for regulating valve
Degree, stable pressure difference can be realized in fluid outlet, solve nozzle wear seriously and fluid mixes uneven technology with material
Problem.
Brief description of the drawings
Fig. 1 is the internal structure schematic diagram of nozzle provided by the invention；
Fig. 2 is the internal structure schematic diagram of blender provided by the invention.
In figure：
100- blenders；
1- nozzles；2- enters fluid hose；3- feed spaces；4- deflectors；5- mixing chambers；6- anemostats；
11- fluid intakes；12- fluid issuings；13- main channels；14- circular passages；15- communicating pipes；16- regulating valves；31-
Inner chamber；32- charging apertures；33- main bodys；
141- advections portion；142- contraction flow regions.
Embodiment
In order that those skilled in the art more fully understand technical scheme, below in conjunction with the accompanying drawings and by specific
Embodiment further illustrates technical scheme.
As shown in figure 1, the fluid that the cross-sectional area of the fluid intake 11 for the nozzle 1 that the present embodiment provides is more than nozzle 1 goes out
The cross-sectional area of mouth 12, nozzle 1 include main channel 13, some circular passages 14, some communicating pipes 15 and regulating valve 16.Wherein,
Circular passage 14 is set in the outside of main channel 13, and circular passage 14 is located at one end of the inside of nozzle 1 and main channel 13 is not led
It is logical, the other end and turned on outside.Every circular passage 14 is conducted with main channel 13 respectively by communicating pipe 15, in every connection
Regulating valve 16 is provided with pipe 15, by adjusting the aperture of regulating valve 16, realizes pressure and atmospheric pressure at fluid issuing 12
Between stable pressure difference, it is notable that the pressure difference being related in the application refers to：The pressure that fluid outlet 12 is formed with it is big
Difference between air pressure (negative pressure finger pressure is less than atmospheric pressure, and malleation finger pressure is more than atmospheric pressure).
The present embodiment is more than the technological means of the cross-sectional area of fluid issuing 12 by the cross-sectional area of fluid intake 11, uses
To reach the technique effect that negative pressure is formed at fluid issuing 12；The present embodiment includes main channel 13 and main logical by nozzle 1
The outside in road 13 is arranged some circular passages 14, and circular passage 14 is located at one end of the inside of nozzle 1 and main channel 13 is not turned on,
The other end and turned on outside, every circular passage 14 is conducted with main channel 13 respectively by communicating pipe 15, in every communicating pipe
It is provided with regulating valve 16 on 15, adjusts the aperture of regulating valve 16, realizes steady between pressure and the atmospheric pressure at fluid issuing 12
Level pressure is poor, solves the serious wear of nozzle 1 and fluid mixes uneven technical problem with material.Specific control mode is, when
Pressure difference at fluid issuing 12 has exceeded stable pressure difference, increases the aperture of regulating valve 16, enables flow through having for fluid issuing 12
Imitating cross-sectional area increase, (it is worth noting that the cross-sectional area of fluid issuing 12 is different from effective cross section product, cross-sectional area is
Refer to the cross-sectional area of profile, effective cross section product refers to the cross-sectional area for having fluid to pass through), when the total flow for being passed through fluid is kept
When constant, the pressure difference at fluid issuing 12 will decrease, by reasonably regulating and controlling to realize stable pressure difference；Work as fluid issuing
Pressure difference at 12 is less than stable pressure difference, reduces the aperture of regulating valve 16, enables flow through the effective cross section of fluid issuing 12
Product reduces, and when the total amount for being passed through fluid keeps constant, the pressure difference at fluid issuing 12 will raise, by reasonably adjusting
Stable pressure difference is realized in control.When circular passage 14 is multiple, the aperture of one or more regulating valves 16 can be adjusted, as long as making stream
Body is accumulated by the effective cross section of fluid issuing 12 to be changed.
In the present embodiment, the cross-sectional area of the fluid intake 11 of nozzle 1 is more than the cross section of the fluid issuing 12 of nozzle 1
Product, the flow velocity increase by the fluid in nozzle 1 can be made, so as to realize the technique effect preferably mixed with subsequent material.Tool
Body, the cross-sectional area of fluid intake 11 are DN100, and the cross-sectional area of fluid issuing 12 is DN50, the fluid of conveying with pressure from
Nozzle 1 can obtain subsonic speed (i.e. 0.4~0.7 times of the velocity of sound) after flowing out.
In the present embodiment, nozzle 1 also includes sensor and controller.Wherein, sensor is arranged at fluid issuing 12,
For detecting the pressure difference at fluid issuing 12, controller electrically connects with regulating valve 16 and sensor respectively, for receiving sensor
The differential pressure information of feedback, and judge differential pressure information and the relation of stable pressure difference.When the pressure difference detected is higher than stable pressure difference,
Controller controls to adjust the increase of the aperture of valve 16, enables flow through the effective cross section product increase of fluid issuing 12, reduces fluid
Export the pressure difference at 12；When the pressure difference detected controls to adjust the reduction of the aperture of valve 16, make stream less than stable pressure difference, controller
Body is accumulated by the effective cross section of fluid issuing 12 to be reduced, and increases the pressure difference at fluid issuing 12, so as to realize stable pressure difference
Automation regulation.
In the present embodiment, main channel 13 is revolving body, and the advection portion 141 that each circular passage 14 includes being connected is with receiving
Contracting portion 142, direction of the contraction flow region 142 along flow of fluid, by setting contraction flow region 142, lead to towards the centerline dip of main channel 13
Venturi principle is crossed to realize in the exit of contraction flow region 142 formation pressure difference.
In the present embodiment, fluid is liquid or gas.When for liquid when, liquid can be conveyed by pump；When for gas
When, the conveying of gas can be realized by roots blower.
As shown in Fig. 2 the present embodiment also provides a kind of blender 100.Blender 100 includes nozzle 1 as mentioned above, entered
Fluid hose 2 and feed space 3.Wherein, enter fluid hose 2 and be provided with one end of fluid intake 11 with nozzle 1 to be connected, air is from entering
The opening's edge A directions as shown in Figure 2 that enter of fluid hose 2 enter, and the inner chamber 31 of feed space 3 is connected with fluid issuing 12, feed space 3
On offer the charging aperture 32 launched for coal dust, coal dust enters feed space 3 from charging aperture 32 along B directions as shown in Figure 2
In inner chamber 31, the position of charging aperture 32 is higher than fluid issuing 12.The coal dust entered is so launched in self gravitation and fluid issuing
At 12 in the presence of stable pressure difference, it is sufficiently mixed into inner chamber 31 with air.For solving the nozzle set on blender 100
1 serious wear, and air mixes the problem of uneven with coal dust.
In the present embodiment, nozzle 1 is arranged in the side wall of feed space 3, and side wall and the bottom plate of feed space 3 are set by tilting
The deflector 4 put is connected, and deflector 4 is located at the lower section of nozzle 1, can prevent coal dust enter side wall formed with bottom plate it is dead
In angle, ensure being sufficiently mixed for coal dust and air.In addition, being also sequentially communicated mixing chamber 5 and anemostat 6 on feed space 3, spread
Flow direction of the pipe 6 along gas is expanded to surrounding, so that the air of accelerated pressurization returns to normal speed and pressure, joins
With the progress of subsequent technique.
In the present embodiment, flange is provided with the periphery of nozzle 1, nozzle 1 is mutually fixed with side wall by flange, conveniently torn open
Dress.The main body 33 of feed space 3 is cuboid, due to there is flat sidewall, so facilitating the installation of nozzle 1.In addition, in the present embodiment
In, air may be replaced by other gases or liquid, and coal dust could alternatively be unclassified stores, be directed to different mixing works
Skill carries out different selections, all within the protection domain of the application.
The present embodiment also provides a kind of feeding system for including as above blender 100, for solving the serious wear of nozzle 1,
And fluid mixes the problem of uneven with material.
It should be strongly noted that the blender and feeding system in the present embodiment belong to same technology with above-mentioned nozzle
Design.So in blender and feeding system not detailed description detail content, refer to the nozzle in the present embodiment,
This is repeated no more.
Pay attention to, the general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The industry
Technical staff it should be appreciated that the present invention is not limited to the embodiments described above, described in above-mentioned embodiment and specification
Merely illustrate the principles of the invention, without departing from the spirit and scope of the present invention, the present invention also have various change and
Improve, these changes and improvements all fall within the protetion scope of the claimed invention, and claimed scope of the invention is by appended
Claims and its equivalent thereof.
Claims (10)
1. a kind of nozzle, it is characterised in that the cross-sectional area of the fluid intake (11) of the nozzle (1) is more than the nozzle (1)
Fluid issuing (12) cross-sectional area, the nozzle (1) includes：
Main channel (13)；
Some circular passages (14), are set in the outside of the main channel (13), and the circular passage (14) is located at the nozzle
(1) one end of inside is not turned on the main channel (13), the other end and turned on outside；
Some communicating pipes (15), every circular passage (14) by the communicating pipe (15) respectively with the main channel (13)
It is conducted；And
Regulating valve (16), it is arranged on every communicating pipe (15), by adjusting the aperture of the regulating valve (16), realizes institute
State the stable pressure difference between the pressure at fluid issuing (12) place and atmospheric pressure.
2. nozzle according to claim 1, it is characterised in that the nozzle (1) also includes：
Sensor, the fluid issuing (12) place is arranged on, for detecting the pressure difference at the fluid issuing (12) place；And
Controller, electrically connected respectively with the regulating valve (16) and the sensor, for receiving the pressure of the sensor feedback
Poor information, and for adjusting the aperture of the regulating valve (16), stable pressure difference can be realized at the fluid issuing (12) place.
3. nozzle according to claim 1, it is characterised in that the main channel (13) is revolving body, each annular
Passage (14) includes the advection portion (141) that is connected and contraction flow region (142), and the contraction flow region (142) is along the flow of fluid
Centerline dip of the direction towards the main channel (13).
4. according to the nozzle described in any one of claims 1 to 3, it is characterised in that the fluid is liquid or gas.
A kind of 5. blender, it is characterised in that including：
Nozzle (1) as described in any one of claims 1 to 3；
Enter fluid hose (2), one end that the fluid intake (11) is provided with the nozzle (1) is connected；
Feed space (3), the inner chamber (31) of the feed space (3) are connected with the fluid issuing (12), on the feed space (3)
The charging aperture (32) launched for material is offered, the position of the charging aperture (32) is higher than the fluid issuing (12).
6. blender according to claim 5, it is characterised in that the nozzle (1) is arranged on the side of the feed space (3)
On wall, the side wall is connected with the bottom plate of the feed space (3) by the deflector (4) being obliquely installed, the deflector (4)
Positioned at the lower section of the nozzle (1).
7. blender according to claim 6, it is characterised in that flange is provided with the periphery of the nozzle (1), it is described
Nozzle (1) is mutually fixed by flange and the side wall.
8. according to the blender described in any one of claim 5~7, it is characterised in that the main body (33) of the feed space (3) is
Cuboid.
9. according to the blender described in any one of claim 5~7, it is characterised in that the fluid is air, and the material is
Coal dust.
10. a kind of feeding system, it is characterised in that including the blender (100) as described in any one of claim 5~9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710936533.4A CN107537335B (en) | 2017-10-10 | 2017-10-10 | Nozzle, mixer and feeding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710936533.4A CN107537335B (en) | 2017-10-10 | 2017-10-10 | Nozzle, mixer and feeding system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107537335A true CN107537335A (en) | 2018-01-05 |
| CN107537335B CN107537335B (en) | 2024-02-06 |
Family
ID=60967005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710936533.4A Active CN107537335B (en) | 2017-10-10 | 2017-10-10 | Nozzle, mixer and feeding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107537335B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109847653A (en) * | 2019-01-21 | 2019-06-07 | 西安交通大学 | A kind of fuel combination pressurization continuous feeding system and method |
| CN111097299A (en) * | 2019-12-26 | 2020-05-05 | 煤科院节能技术有限公司 | Pressure regulating mixer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109847653A (en) * | 2019-01-21 | 2019-06-07 | 西安交通大学 | A kind of fuel combination pressurization continuous feeding system and method |
| CN109847653B (en) * | 2019-01-21 | 2020-10-27 | 西安交通大学 | Mixed fuel pressurization continuous feeding system and method |
| CN111097299A (en) * | 2019-12-26 | 2020-05-05 | 煤科院节能技术有限公司 | Pressure regulating mixer |
| CN111097299B (en) * | 2019-12-26 | 2022-03-15 | 煤科院节能技术有限公司 | Pressure regulating mixer |
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| Publication number | Publication date |
|---|---|
| CN107537335B (en) | 2024-02-06 |
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