CN208074937U - The coal dust pretreatment unit and boiler of boiler - Google Patents
The coal dust pretreatment unit and boiler of boiler Download PDFInfo
- Publication number
- CN208074937U CN208074937U CN201820470060.3U CN201820470060U CN208074937U CN 208074937 U CN208074937 U CN 208074937U CN 201820470060 U CN201820470060 U CN 201820470060U CN 208074937 U CN208074937 U CN 208074937U
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- coal dust
- pretreatment unit
- main reactor
- boiler
- tube
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- 239000002817 coal dust Substances 0.000 title claims abstract description 93
- 239000002826 coolant Substances 0.000 claims abstract description 59
- 239000000843 powder Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 8
- 239000011819 refractory material Substances 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 33
- 239000007789 gas Substances 0.000 abstract description 16
- 230000009467 reduction Effects 0.000 abstract description 8
- 239000000498 cooling water Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 238000000197 pyrolysis Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000002309 gasification Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- PZZOEXPDTYIBPI-UHFFFAOYSA-N 2-[[2-(4-hydroxyphenyl)ethylamino]methyl]-3,4-dihydro-2H-naphthalen-1-one Chemical compound C1=CC(O)=CC=C1CCNCC1C(=O)C2=CC=CC=C2CC1 PZZOEXPDTYIBPI-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Abstract
The utility model discloses the coal dust pretreatment units and boiler of a kind of boiler.Coal dust pretreatment unit includes the main reactor tube for making coal dust form reducibility gas, and main reactor tube includes tube body and the coolant jacket that is sheathed on the outside of tube body, in coolant jacket circulation have cooling medium to reduce the temperature of main reactor tube.Coal dust before burner hearth of the coal dust pretreatment unit of the utility model to entering boiler carries out reduction treatment in main reactor tube and forms it into reducibility gas, and reducibility gas enters burner hearth and restores generated nitrogen oxides to realize the low emission of boiler nitrogen oxides.And coolant jacket is arranged in the outside of tube body in main reactor tube, and the cooling medium to circulate in coolant jacket takes away the heat of tube body, reduces the temperature of main reactor tube outer wall and then improves the safety of boiler operatiopn.
Description
Technical field
The utility model is related to boiler technology field, more particularly to the coal dust pretreatment unit and boiler of a kind of boiler.
Background technology
In order to reduce the concentration of emission of nitrogen oxides, most domestic power plant uses tail portion SCR denitration technology.Using SCR
Denitration technology need to pay huge SCR denitration operation and maintenance cost every year, and whole economic efficiency is bad, while SCR denitration technology
The corrosion and blocking for easily leading to air downstream preheater, influence the safety of boiler controller system.Therefore, how in low cost and safety
The problem of discharge of nitrogen oxides is this field urgent need to resolve is reduced on the basis of reliable.
Utility model content
The purpose of this utility model is to provide the coal dust pretreatment units and boiler of a kind of boiler, on inexpensive basis
The upper discharge for reducing nitrogen oxides.
The utility model first aspect provides a kind of coal dust pretreatment unit of boiler, including is used to make coal dust to form reduction
Property gas main reactor tube, main reactor tube includes tube body and the coolant jacket that is sheathed on the outside of tube body, in coolant jacket circulation have cooling
Medium is to reduce the temperature of main reactor tube.
Further, coolant jacket includes water-cooled jacket.
Further, coolant jacket includes shell and inner casing, is formed for the cold of cooling medium that circulate between shell and inner casing
But chamber.
Further, coal dust pretreatment unit further includes the cooling medium source for inputting cooling medium into coolant jacket.
Further, main reactor tube includes at least two coolant jackets being arranged along short transverse, at least two coolant jackets
Cooling medium it is mutually isolated.
Further, main reactor tube further includes the collet being set between coolant jacket and tube body.
Further, tube body is made of refractory material.
Further, coal dust pretreatment unit further includes the wind powder pipe road for inputting coal dust, main reactor tube and wind powder pipe
Road connects and the area of section of main reactor tube is more than the area of section in wind powder pipe road.
Further, coal dust pretreatment unit further includes the deceleration tube for connecting wind powder pipe road and main reactor tube, in coal
On the direction of powder conveying, the area of section of deceleration tube gradually increases.
Further, coal dust pretreatment unit further includes for conveying the defeated of reducibility gas and coal dust to the burner hearth of boiler
Outlet pipe and accelerating tube for connecting efferent duct and main reactor tube, on the direction of coal dust conveying, the area of section of accelerating tube
It is gradually reduced.
Further, the angle between the axis and vertical line of main reactor tube is 0~30 °.
The utility model second aspect provides a kind of boiler, including burner hearth and any one of such as the utility model first aspect
The coal dust pretreatment unit of the boiler of offer.
Coal dust pretreatment unit and boiler based on boiler provided by the utility model, coal dust pretreatment unit include being used for
Coal dust is set to form the main reactor tube of reducibility gas, main reactor tube includes tube body and the coolant jacket that is sheathed on the outside of tube body, cooling
Circulation has cooling medium to reduce the temperature of main reactor tube in set.The coal dust pretreatment unit of the utility model is to entering boiler
Coal dust before burner hearth carries out reduction treatment in main reactor tube and forms it into reducibility gas, and reducibility gas enters burner hearth reduction
Generated nitrogen oxides is to realize the low emission of boiler nitrogen oxides.And cooling is arranged in the outside of tube body in main reactor tube
Set, the interior cooling medium to circulate of coolant jacket take away the heat of tube body, reduce the temperature of main reactor tube outer wall and then improve boiler and transport
Capable safety.And the wall temperature reduction of main reactor tube can improve main reactor tube and be thermally expanded because of caused by temperature height, in turn
It is run with security and stability to realize the low emission of boiler nitrogen oxides for a long time conducive to the entire coal dust pretreatment unit of guarantee.
By referring to the drawings to the detailed description of the exemplary embodiment of the utility model, the utility model it is other
Feature and its advantage will become apparent.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings：
Fig. 1 is the structural schematic diagram of the coal dust pretreatment unit of one embodiment of the utility model；
Fig. 2 is the cross section structure schematic diagram of the main reactor tube in Fig. 1；
Fig. 3 is the structural schematic diagram of the coal dust pretreatment unit of another embodiment of the utility model.
Each reference numeral respectively represents：
1- wind powder pipes road；2- heat sources；21- incendiary sources；3- main reactor tubes；31- tube bodies；32- collets；33- coolant jackets；4-
Accelerating tube；5- efferent ducts；7- bend pipes；8- deceleration tubes；11- inlet pipelines；12- water return pipelines.
Specific implementation mode
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, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to this practicality
Novel and its application or any restrictions used.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
There is the every other embodiment obtained under the premise of making creative work, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
Up to the unlimited the scope of the utility model processed of formula and numerical value.Simultaneously, it should be appreciated that for ease of description, attached shown in the drawings each
The size of a part is not to be drawn according to actual proportionate relationship.For skill known to person of ordinary skill in the relevant
Art, method and apparatus may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as awarding
Weigh part of specification.In shown here and discussion all examples, any occurrence should be construed as merely example
Property, not as limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：It is similar
Label and letter similar terms are indicated in following attached drawing, therefore, once be defined in a certain Xiang Yi attached drawing, then with
It need not be further discussed in attached drawing afterwards.
For ease of description, herein can with use space relative terms, as " ... on ", " in ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (be rotated by 90 ° or be in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
As shown in Figure 1, the coal dust pretreatment unit of the boiler of the utility model embodiment includes for making coal dust be formed also
The main reactor tube 3 of originality gas.Main reactor tube 3 includes tube body 31 and the coolant jacket 33 for being sheathed on 31 outside of tube body.Coolant jacket 33
Interior circulation has cooling medium to reduce the temperature of main reactor tube 3.
Coal dust before burner hearth of the coal dust pretreatment unit of the utility model embodiment to entering boiler is in main reactor tube
It carries out reduction treatment and forms it into reducibility gas, reducibility gas enters burner hearth and restores generated NOxTo realize boiler
The low emission of nitrogen oxides.And the boiler of the utility model embodiment only needs increase coal dust to locate in advance on the basis of original burner hearth
Device is managed, it is simple in structure and easy to transform, reduce cost.To sum up, the boiler of the utility model embodiment is on the basis of low cost
The upper low emission for realizing nitrogen oxides.
And coolant jacket 33, the cooling circulated in coolant jacket 33 is arranged in the outside of tube body 31 in the main reactor tube of the present embodiment
Medium takes away the heat of tube body 31, reduces the temperature of main reactor tube outer wall and then improves the safety of boiler operatiopn.And it is main anti-
Should the wall temperature reduction of pipe can improve main reactor tube and is thermally expanded because of caused by temperature height, and then locate in advance conducive to the entire coal dust of guarantee
Reason device is run with security and stability to realize the low emission of boiler nitrogen oxides for a long time.
Preferably, as shown in Fig. 2, the main reactor tube of the present embodiment further includes being set between tube body 31 and coolant jacket 33
Collet 32.Collet 32 can reduce the heat that coolant jacket 33 is transferred to from tube body 31, further make main reactor tube outer wall
Temperature is maintained at lower safe temperature hereinafter, improving the safety of device operation.And the setting of collet 32 reduces transmission
To the heat of coolant jacket 33 so that coolant jacket 33 can make the temperature of main reactor tube outer wall in the case where consuming smaller Endothermic power
In the case that degree is maintained at same temperature, therefore cost can be reduced.
The structure of the coal dust pretreatment unit of the utility model specific embodiment is carried out below according to Fig. 1 to Fig. 3 detailed
Explanation.
As shown in Figure 1, the coal dust pretreatment unit of the present embodiment includes wind powder pipe road 1, heat source 2, main reactor tube 3 and output
Pipe 5.Wind powder pipe road 1 is for inputting primary wind and powder and primary wind and powder being transported in main reactor tube 3.The coal dust of the present embodiment is located in advance
Heat source 2 is arranged in reason device on wind powder pipe road 1, and heat source provides reliable and stable burning things which may cause a fire disaster for pyrolysis of coal and gasification, significantly promoted
Adaptability of the coal dust pretreatment unit to operating mode and coal.And the heat release of coal dust own combustion can be gentle for the pyrolysis of coal dust
Change and energy is provided, power is low needed for heat source, therefore the setting of heat source can't bring for the coal dust pretreatment unit of the present embodiment
The raising of more costs.Wherein, heat source 2 can be burner, plasma apparatus, oil gun device, air gun device, high temperature air confession
The device of primary wind and powder can be lighted to device etc..
The tube body 31 of the present embodiment is made of refractory material.Refractory material can be refractory brick etc..
In the present embodiment, coolant jacket 33 includes water-cooled jacket.Circulation cycle cooling water takes away heat in water-cooled jacket.
Can also circulate other cooling media in the unshowned embodiment of other accompanying drawings, in coolant jacket, such as cooling air
Body etc..
Specifically, as shown in Fig. 2, water-cooled jacket includes shell and inner casing.It is formed for the water that circulates between shell and inner casing
Cooling chamber.The water-cooled jacket of the present embodiment uses double-tube structure, simple in structure.
As shown in Figure 1, the coal dust pretreatment unit of the present embodiment further include for into water-cooled jacket input cooling water into
Water lines 11 and water return pipeline 12 for exporting cooling water.Preferably, the company of the inlet pipeline 11 and water-cooled jacket of the present embodiment
Interface is less than the connector of water return pipeline 12 and water-cooled jacket, is fully inhaled to slow down the speed that cooling water recycles in water-cooled jacket
Heat improves the cooling result of water-cooled jacket.
In the present embodiment, coal dust pretreatment unit further includes the cooling medium for inputting cooling medium into coolant jacket
Source.Specifically, the coal dust pretreatment unit of the present embodiment further includes the cooling water header as cooling medium source.
As shown in Fig. 2, the main reactor tube 3 of the present embodiment further includes the collet being set between water-cooled jacket and tube body 31
32.Collet 32 can reduce the heat that water-cooled jacket is transferred to from tube body 31, further keep the temperature of main reactor tube outer wall
In lower safe temperature hereinafter, improving the safety of device operation.
As shown in figure 3, in another embodiment, main reactor tube 3 includes at least two coolant jackets being arranged along short transverse
33, the cooling medium at least two coolant jackets 33 is mutually isolated.At least two coolant jackets 33 being arranged independently of each other are in height
It is stacked on direction, improves the dismounting convenience of main reactor tube 3.And the cooling medium between each coolant jacket 33 is mutually isolated mutually
It is unaffected, to carry out adaptable control conducive to the temperature requirement of the different height according to main reactor tube.
The coolant jacket 33 of the present embodiment is water-cooled jacket.As shown in figure 3, the present embodiment schematically shows three water-cooled jackets.
The inlet pipeline 11 of the present embodiment forms the connection corresponding with three water-cooled jackets respectively of three water inlet branches by shunting.And three
Water inlet branch road is both provided with the water inlet control valve of the flow for controlling cooling water.It, can basis during actually controlling
The severe degree of main reaction combustion inner pipe adjusts the aperture of water inlet control valve to adjust the cooling water inflow of cycle.
Similarly, also it is both provided with water-returning control valve between the water outlet of each water-cooled jacket and water return pipeline 12.
As shown in figure 3, in order to extend reaction time of the coal dust in main reactor tube, the main reactor tube 3 of the present embodiment is cut
Face area is more than the area of section in wind powder pipe road 1.Such setting both can extend the reaction time, and the pyrolysis of coal dust and gasification is made to have
The enough reaction time；The accumulated powder and clogging problems that can be effectively improved again in main reactor tube 3.
Optionally, the ratio between the area of section and the area of section in wind powder pipe road 1 of the main reactor tube 3 of the present embodiment is
3~15.5.By experimental verification, stop in main reactor tube 3 to extend coal dust when above-mentioned ratio between the two is less than 3
Stay the time, it is necessary to increase the length of main reactor tube.And the length increase of main reactor tube can cause the integral arrangement of boiler difficult
And the increase of boiler overall cost.When above-mentioned ratio between the two is more than 15.5, there is also similar problems.By comprehensive
Close multiple experimental verification, the ratio between the area of section and the area of section in wind powder pipe road 1 of the main reactor tube 3 of the present embodiment
It is 3~15.5.
Optionally, the coal dust pretreatment unit of the present embodiment further includes for connecting subtracting for wind powder pipe road 1 and main reactor tube 3
Fast pipe 8, on the direction of coal dust conveying, the area of section of deceleration tube 8 gradually increases.The setting of deceleration tube 8 make coal dust from
Response area gradually increases rather than is mutated during wind powder pipe road 1 is circulated to main reactor tube 3, to improve coal dust reaction
Stability.
Similarly, it is the stability for improving coal dust reaction, the coal dust pretreatment unit of the present embodiment further includes for pot
The burner hearth conveying reducibility gas of stove and the efferent duct 5 of coal dust and the accelerating tube 4 for connecting efferent duct 5 and main reactor tube 3,
On the direction of coal dust conveying, the area of section of accelerating tube 4 is gradually reduced.In accelerating tube 4, gas flow rate lifting process is more
Steadily, it helps avoid the generation of 3 exit of main reactor tube vortex and reduces the resistance of air-flow flowing.
In some embodiments, efferent duct 5 can directly be connect with main reactor tube 3.
Specifically in the present embodiment, deceleration tube 8 and accelerating tube 4 are conical pipe.
In the present embodiment, the angle between the axis and vertical line of main reactor tube 3 is 0~30 °.Main reactor tube 3 is substantially
Vertical to be arranged such that coal dust firing is stablized, uniformity of temperature profile easily forms uniform hot environment, is conducive to pyrolysis and the gas of coal dust
Change reaction.Through experiment, the mean temperature of coal dust pretreatment unit inside smoke can make coal dust rapid up to 900 DEG C~1500 DEG C
Pyrolysisization generates a large amount of reducibility gas, thus while the area of section of main reactor tube 3 is larger and due to inside smoke temperature
It is higher without will produce accumulated powder and slagging.And the flue-gas temperature of pretreatment unit output reaches 800 DEG C~1200 DEG C, is entering
There is steady combustion effect to the coal dust firing in burner hearth after to burner hearth.
In the present embodiment, deceleration tube 8, main reactor tube 3 and the roughly vertical setting of accelerating tube 4.
As shown in figure 3, the coal dust pretreatment unit of the present embodiment further includes for connecting wind powder pipe road 1 and deceleration tube 8
Bend pipe 7.The setting of bend pipe 7 is so that the coal dust pretreatment unit of the present embodiment is adapted to the arrangement of different boilers.And
And wind powder since the centrifugal action of bend pipe 7 can be such that coal dust is assembled, is conducive to the igniting of coal dust, expands when by bend pipe 7
Accommodation of the coal dust pretreatment unit to coal quality and operating mode.
Heat source 2 can be set in bend pipe 7, be entered after so that coal dust is caught fire in advance in main reactor tube 3.And bend pipe 7 is logical
It crosses deceleration tube 8 and connect the vortex that can eliminate Initial Stage after Ignition with main reactor tube 3, be conducive to the diffusion of flame and stablize burning.
Specifically in the present embodiment, heat source 2 includes the incendiary source 21 being set in deceleration tube 8.
In the unshowned embodiment of other accompanying drawings, heat source 2 includes an incendiary source being located in bend pipe 7 and positioned at subtracting
Another incendiary source in fast pipe 8 to realize that the fractional combustion of coal dust enhances the ignition performance of heat source, and makes flame combustion more
Add stabilization.
Certainly, heat source 2 can also include more than two incendiary sources, further enhance the ignition performance of heat source.In reality
In engineering practice, the coal dust of the present embodiment can be made to locate in advance by reasonably selecting the installation position of power of heat source and incendiary source
Reason device is adapted to a greater variety of coals quality and operating mode.
In some embodiments, the power adjustable of heat source.By adjusting the power of heat source, incendiary source 21 can be adjusted and lighted
The ignition intensity of primary wind and powder so as to control the combustion intensity inside coal dust pretreatment unit, and then can adjust coal dust
The temperature of pretreatment unit work, contributes to anti-locking apparatus overtemperature, slagging.
It should be noted that coal dust can occur in deceleration tube 8, main reactor tube 3, accelerating tube 4 and efferent duct 5
Pyrolysis and gasification reaction.
The coal dust pretreatment unit of above example can reduction coal due to a large amount of reducibility gas generated in gasification
The NOx that generates when powder burns is, it can be achieved that coal dust pretreatment unit exports aborning NOx is 0 or tends to 0.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model rather than limits it
System；Although the utility model is described in detail with reference to preferred embodiment, those of ordinary skill in the art should
Understand：It can still modify to specific embodiment of the present utility model or some technical characteristics are equally replaced
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.
Claims (12)
1. a kind of coal dust pretreatment unit of boiler, which is characterized in that include for making the coal dust form reducibility gas
Main reactor tube (3), the main reactor tube (3) include tube body (31) and the coolant jacket (33) being sheathed on the outside of the tube body (31),
Circulation has cooling medium to reduce the temperature of the main reactor tube (3) in the coolant jacket (33).
2. the coal dust pretreatment unit of boiler according to claim 1, which is characterized in that the coolant jacket (33) includes water
Cold set.
3. the coal dust pretreatment unit of boiler according to claim 1, which is characterized in that the coolant jacket (33) includes outer
Shell and inner casing form the cooling chamber for the cooling medium that circulates between the shell and the inner casing.
4. the coal dust pretreatment unit of boiler according to claim 1, which is characterized in that the coal dust pretreatment unit is also
Cooling medium source including being used for the cooling medium of from the input to the coolant jacket (33).
5. the coal dust pretreatment unit of boiler according to claim 1, which is characterized in that the main reactor tube (3) includes
Along at least two coolant jackets (33) of short transverse setting, the cooling medium at least two coolant jacket (33) is mutual
Isolation.
6. the coal dust pretreatment unit of boiler according to any one of claim 1 to 5, which is characterized in that the master is anti-
It further includes the collet (32) being set between the coolant jacket (33) and the tube body (31) that (3), which should be managed,.
7. the coal dust pretreatment unit of boiler according to any one of claim 1 to 5, which is characterized in that the tube body
(31) it is made of refractory material.
8. the coal dust pretreatment unit of boiler according to any one of claim 1 to 5, which is characterized in that the coal dust
Pretreatment unit further includes the wind powder pipe road (1) for inputting coal dust, and the main reactor tube (3) connects with the wind powder pipe road (1)
Connect and the area of section of the main reactor tube (3) be more than the wind powder pipe road (1) area of section.
9. the coal dust pretreatment unit of boiler according to claim 8, which is characterized in that the coal dust pretreatment unit is also
Deceleration tube (8) including being used to connect the wind powder pipe road (1) and the main reactor tube (3), on the direction of coal dust conveying, institute
The area of section for stating deceleration tube (8) gradually increases.
10. the coal dust pretreatment unit of boiler according to any one of claim 1 to 5, which is characterized in that the coal dust
Pretreatment unit further includes for conveying the efferent duct (5) of reducibility gas and coal dust to the burner hearth of the boiler and for connecting
The accelerating tube (4) for connecing the efferent duct (5) and the main reactor tube (3), on the direction of coal dust conveying, the accelerating tube (4)
Area of section be gradually reduced.
11. the coal dust pretreatment unit of boiler according to any one of claim 1 to 5, which is characterized in that the master is anti-
It is 0~30 ° that the angle between the axis and vertical line of (3), which should be managed,.
12. a kind of boiler, which is characterized in that the coal dust of the boiler including burner hearth and as described in any one of claim 1 to 11
Pretreatment unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820470060.3U CN208074937U (en) | 2018-03-30 | 2018-03-30 | The coal dust pretreatment unit and boiler of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820470060.3U CN208074937U (en) | 2018-03-30 | 2018-03-30 | The coal dust pretreatment unit and boiler of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208074937U true CN208074937U (en) | 2018-11-09 |
Family
ID=64043425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820470060.3U Active CN208074937U (en) | 2018-03-30 | 2018-03-30 | The coal dust pretreatment unit and boiler of boiler |
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| Country | Link |
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| CN (1) | CN208074937U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194918A (en) * | 2018-03-30 | 2018-06-22 | 烟台龙源电力技术股份有限公司 | The coal dust pretreatment unit and boiler of boiler |
-
2018
- 2018-03-30 CN CN201820470060.3U patent/CN208074937U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194918A (en) * | 2018-03-30 | 2018-06-22 | 烟台龙源电力技术股份有限公司 | The coal dust pretreatment unit and boiler of boiler |
| CN108194918B (en) * | 2018-03-30 | 2023-12-22 | 烟台龙源电力技术股份有限公司 | Pulverized coal pretreatment device of boiler and boiler |
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