CN204494457U - A kind of pulverized coal preheating device - Google Patents
A kind of pulverized coal preheating device Download PDFInfo
- Publication number
- CN204494457U CN204494457U CN201520113873.3U CN201520113873U CN204494457U CN 204494457 U CN204494457 U CN 204494457U CN 201520113873 U CN201520113873 U CN 201520113873U CN 204494457 U CN204494457 U CN 204494457U
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- Prior art keywords
- heated roller
- runner
- turning cylinder
- base
- preheating device
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- 239000003245 coal Substances 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 239000003546 flue gas Substances 0.000 claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000010883 coal ash Substances 0.000 claims abstract description 12
- 239000000779 smoke Substances 0.000 claims abstract description 6
- 230000007797 corrosion Effects 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 abstract description 36
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005243 fluidization Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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Abstract
The utility model relates to a kind of pulverized coal preheating device, comprise heated roller and coal ash runner, coal ash runner is made up of base and upper cover, coal ash runner comprises a cylindrical cavity be arranged between base upper surface and upper cover, heated roller is arranged in cylindrical cavity, the two ends of heated roller and the two ends of cylindrical cavity are rotationally connected by turning cylinder, at base be also provided with charging runner and discharge runner between upper surface and upper cover, charging runner, discharge runner are communicated with in cylindrical cavity respectively; Turning cylinder one end is fixedly connected with base, and turning cylinder other end outer wall is rotationally connected by bearing and heated roller end, and the turning cylinder being positioned at heated roller two ends is all communicated with heated roller inside; The turning cylinder of heated roller one end is communicated with smoke-intake pipe, and the turning cylinder of the heated roller other end is communicated with smoke exhaust pipe, and the cylinder mechanism that heated by boiler tail flue gas by one realizes the heating to coal dust, effectively can improve temperature when coal dust is blown into burner hearth.
Description
Technical field
The utility model relates to a kind of pulverized coal preheating device, belongs to fluidization boiler accessory machinery always.
Background technology
Coal dust is generally blown in boiler by high velocity air by fluidization boiler, realizing the fluidized combustion of coal dust, in order to improve the efficiency of combustion of boiler, generally can carry out preheating to high velocity air, thus the preheating realized coal dust, thus reduction coal dust reaches the heat required for burning-point in boiler;
Air preheater is generally used in fluidization boiler as a kind of boiler combustion air-flow firing equipment, it is mainly through a dividing wall type heat exchanger, by the flue gas of boiler back end ductwork with enter the air before boiler and carry out heat exchange, to improve the heat exchange performance of boiler, reduce energy ezpenditure;
But air preheater also also exists many problems;
First because the problem of gaseous fluid heat exchange efficiency, the utilization rate of air preheater to flue gas heat is lower, and when boiler load is lower, tail flue gas may be difficult to air themperature to bring up to predetermined value, is furthermore difficult to coal dust to be heated to predetermined temperature;
Secondly, in Various Seasonal, especially in the winter time and autumn, the temperature of coal dust self is lower, and single air preheater is difficult to coal dust to be heated to predetermined temperature, thus affects the heat exchange performance of boiler;
Finally, when coal dust is blown into burner hearth by gas, its velocity ratio is very fast, and heat-exchange time and heat exchange efficiency are all more limited, is sometimes also difficult to timely coal dust be heated predetermined temperature.
Utility model content
The technical problems to be solved in the utility model is: overcome the limited efficacy that in prior art, air preheater heats coal dust, provide a kind of can directly to the auxiliary equipment that coal dust heats.
The utility model solves the technical scheme that its technical problem adopts:
A kind of pulverized coal preheating device, comprise heated roller and coal ash runner, described coal ash runner is made up of base and upper cover, described coal ash runner comprises a cylindrical cavity be arranged between base upper surface and upper cover, described heated roller is arranged in cylindrical cavity, the two ends of described heated roller and the two ends of cylindrical cavity are rotationally connected by turning cylinder, at described base be also provided with charging runner and discharge runner between upper surface and upper cover, described charging runner and discharge runner are arranged relative to the axisymmetrical of heated roller, described charging runner, discharge runner is communicated with in cylindrical cavity respectively,
Described turning cylinder is hollow structure, and described turning cylinder one end is fixedly connected with base, and described turning cylinder other end outer wall is rotationally connected by bearing and heated roller end, and the turning cylinder being positioned at heated roller two ends is all communicated with heated roller inside;
The turning cylinder of described heated roller one end is communicated with smoke-intake pipe, and the turning cylinder of the heated roller other end is communicated with smoke exhaust pipe;
A ring gear is coaxially arranged with in one of them end outer surface of described heated roller, described base is rotatably connected to a driving shaft, described driving shaft is fixed with a driven wheel be meshed with ring gear, described driving shaft is connected with motor-driven.
As further innovation of the present utility model, be fixed with some auxiliary heating heads for increasing heat exchange area at the outer surface of described heated roller.
As further innovation of the present utility model, described auxiliary heating head is semi-enclosed hollow structure, and the described internal cavities of auxiliary heating head is connected with the internal cavities of heated roller.
As further innovation of the present utility model, the agent structure of described auxiliary heating head is cylindrical, and the blind end of described auxiliary heating head is hemispherical.
As further innovation of the present utility model, be also provided with spiral distributing fin at described heated roller inwall, the position of described auxiliary heating head correspondence heating rolling inwall is between distributing fin.
As further innovation of the present utility model, be respectively provided with a screen pack in the both sides of described heated roller internal cavities, described heated roller is filtered flue gas by screen pack.
As further innovation of the present utility model, described upper cover adopts corrosion resistant plate to make, and is enclosed with asbestos at upper lid surface.
As further innovation of the present utility model, base adopts pottery to make, and described upper cover is fixed on base by screw rod group.
The beneficial effects of the utility model are:
1, the utility model realizes to coal dust by the cylinder mechanism that heated by boiler tail flue gas heating, effectively can carry out fragmentation to coal dust caking because of moist simultaneously, homogeneous heating degree is good, effectively can improve temperature when coal dust is blown into burner hearth, improves the heat exchange efficiency of boiler.
2, auxiliary heating head can improve the heat exchange area of cylinder surface, improves the efficiency of heating surface of coal dust.
3, the cavity connects in auxiliary heating head and cylinder, compared to solid auxiliary heating head, heat exchange area is larger, and heat transfer effect is better.
4, hemispheric blind end can reduce the resistance of coal dust when mobile compared to the blind end of column, improves the efficiency of heating surface of coal dust.
5, spiral distributing fin not only can the stream of prolong smoke, improves the time that flue gas stops at inner wall of rotary drum, further can improve the heat exchange area of drum inner surface simultaneously, the efficiency of heating surface of raising coal dust.
6, the coal dust that the screen pack in cylinder can prevent the dust in tail flue gas and interface from infiltrating is piled up in cylinder, affects heat exchange efficiency.
7, the upper cover that stainless steel is made has wear-resisting, and the advantages such as acid-resisting corrosion, can improve the service life of pulverized coal preheating device.
8, the base of ceramic quality has the lower coefficient of heat transfer, can ensure the heat exchange efficiency of coal dust, reduces scattering and disappearing of heat energy.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is side sectional view of the present utility model;
Fig. 2 is top view;
Figure comprises: heated roller 1,
Auxiliary heating head 2,
Screen pack 3,
Upper cover 4,
Cylindrical cavity 5,
Base 6,
Charging runner 7,
Discharge runner 8,
Driving shaft 9,
Turning cylinder 10,
Distributing fin 11,
Ring gear 12,
Driven wheel 13.
Detailed description of the invention
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
As depicted in figs. 1 and 2, the utility model is a kind of pulverized coal preheating device, comprise heated roller 1 and coal ash runner, described coal ash runner is made up of base 6 and upper cover 4, described coal ash runner comprises a cylindrical cavity 5 be arranged between base 6 upper surface and upper cover 4, described heated roller 1 is arranged in cylindrical cavity 5, the two ends of described heated roller 1 and the two ends of cylindrical cavity 5 are rotationally connected by turning cylinder 10, at described base 6 be also provided with charging runner 7 and discharge runner 8 between upper surface and upper cover 4, described charging runner 7 and discharge runner 8 are arranged relative to the axisymmetrical of heated roller 1, described charging runner 7, discharge runner 8 is communicated with respectively with in cylindrical cavity 5,
Described turning cylinder 10 is hollow structure, and described turning cylinder 10 one end is fixedly connected with base 6, and described turning cylinder 10 other end outer wall is rotationally connected by bearing and heated roller 1 end, and the turning cylinder 10 being positioned at heated roller 1 two ends is all communicated with heated roller 1 inside;
The turning cylinder 10 of described heated roller 1 one end is communicated with smoke-intake pipe, and the turning cylinder 10 of heated roller 1 other end is communicated with smoke exhaust pipe;
Some auxiliary heating heads 2 for increasing heat exchange area are fixed with at the outer surface of described heated roller 1, described auxiliary heating head 2 is semi-enclosed hollow structure, the internal cavities of described auxiliary heating head 2 is connected with the internal cavities of heated roller 1, the agent structure of described auxiliary heating head 2 is cylindrical, the blind end of described auxiliary heating head 2 is hemispherical, also be provided with spiral distributing fin 11 at described heated roller 1 inwall, the position of described auxiliary heating head 2 correspondence heating rolling inwall is between distributing fin 11;
Respectively be provided with a screen pack 3 in the both sides of described heated roller 1 internal cavities, described heated roller 1 is filtered by screen pack 3 pairs of flue gases;
A ring gear 12 is coaxially arranged with in one of them end outer surface of described heated roller 1, described base 6 is rotatably connected to a driving shaft 9, described driving shaft 9 is fixed with a driven wheel 13 be meshed with ring gear 12, described driving shaft 9 is connected with motor-driven;
Described upper cover 4 adopts corrosion resistant plate to make, and is coated with asbestos at upper cover 4, and described base 6 adopts pottery to make, and described upper cover 4 is fixed on base 6 by screw rod group.
When driving, starter motor, heated roller 1 is rolled, coal dust is under the influence of gravity from charging runner 7, and coal dust, under the acting in conjunction of heated roller 1 skin-friction force and heating head mixing power, makes the rolling cavity of coal dust above base 6 and between heated roller 1 bottom outer wall move, while movement, carry out heat exchange by heated roller 1 between coal dust and high-temperature flue gas, have most and discharged by discharge runner 8, realize the drying to coal dust.
The progress of this product has:
1, the utility model realizes to coal dust by the cylinder mechanism that heated by boiler tail flue gas heating, effectively can carry out fragmentation to coal dust caking because of moist simultaneously, homogeneous heating degree is good, effectively can improve temperature when coal dust is blown into burner hearth, improves the heat exchange efficiency of boiler.
2, auxiliary heating head can improve the heat exchange area of cylinder surface, improves the efficiency of heating surface of coal dust.
3, the cavity connects in auxiliary heating head and cylinder, compared to solid auxiliary heating head, heat exchange area is larger, and heat transfer effect is better.
4, hemispheric blind end can reduce the resistance of coal dust when mobile compared to the blind end of column, improves the efficiency of heating surface of coal dust.
5, spiral distributing fin not only can the stream of prolong smoke, improves the time that flue gas stops at inner wall of rotary drum, further can improve the heat exchange area of drum inner surface simultaneously, the efficiency of heating surface of raising coal dust.
6, the coal dust that the screen pack in cylinder can prevent the dust in tail flue gas and interface from infiltrating is piled up in cylinder, affects heat exchange efficiency.
7, the upper cover that stainless steel is made has wear-resisting, and the advantages such as acid-resisting corrosion, can improve the service life of pulverized coal preheating device.
8, the base of ceramic quality has the lower coefficient of heat transfer, can ensure the heat exchange efficiency of coal dust, reduces scattering and disappearing of heat energy.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on description, must determine its technical scope according to right.
Claims (8)
1. a pulverized coal preheating device, it is characterized in that: comprise heated roller and coal ash runner, described coal ash runner is made up of base and upper cover, described coal ash runner comprises a cylindrical cavity be arranged between base upper surface and upper cover, described heated roller is arranged in cylindrical cavity, the two ends of described heated roller and the two ends of cylindrical cavity are rotationally connected by turning cylinder, at described base be also provided with charging runner and discharge runner between upper surface and upper cover, described charging runner and discharge runner are arranged relative to the axisymmetrical of heated roller, described charging runner, discharge runner is communicated with in cylindrical cavity respectively,
Described turning cylinder is hollow structure, and described turning cylinder one end is fixedly connected with base, and described turning cylinder other end outer wall is rotationally connected by bearing and heated roller end, and the turning cylinder being positioned at heated roller two ends is all communicated with heated roller inside;
The turning cylinder of described heated roller one end is communicated with smoke-intake pipe, and the turning cylinder of the heated roller other end is communicated with smoke exhaust pipe;
A ring gear is coaxially arranged with in one of them end outer surface of described heated roller, described base is rotatably connected to a driving shaft, described driving shaft is fixed with a driven wheel be meshed with ring gear, described driving shaft is connected with motor-driven.
2. a kind of pulverized coal preheating device as claimed in claim 1, is characterized in that: be fixed with some auxiliary heating heads for increasing heat exchange area at the outer surface of described heated roller.
3. a kind of pulverized coal preheating device as claimed in claim 2, it is characterized in that: described auxiliary heating head is semi-enclosed hollow structure, the described internal cavities of auxiliary heating head is connected with the internal cavities of heated roller.
4. a kind of pulverized coal preheating device as claimed in claim 3, is characterized in that: the agent structure of described auxiliary heating head is cylindrical, and the blind end of described auxiliary heating head is hemispherical.
5. a kind of pulverized coal preheating device as claimed in claim 2, is characterized in that: be also provided with spiral distributing fin at described heated roller inwall, and the position of described auxiliary heating head correspondence heating rolling inwall is between distributing fin.
6. a kind of pulverized coal preheating device as claimed in claim 1, is characterized in that: be respectively provided with a screen pack in the both sides of described heated roller internal cavities, described heated roller is filtered flue gas by screen pack.
7. a kind of pulverized coal preheating device as claimed in claim 1, is characterized in that: described upper cover adopts corrosion resistant plate to make, and is enclosed with asbestos at upper lid surface.
8. a kind of pulverized coal preheating device as claimed in claim 1, is characterized in that: base adopts pottery to make, and described upper cover is fixed on base by screw rod group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520113873.3U CN204494457U (en) | 2015-02-17 | 2015-02-17 | A kind of pulverized coal preheating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520113873.3U CN204494457U (en) | 2015-02-17 | 2015-02-17 | A kind of pulverized coal preheating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204494457U true CN204494457U (en) | 2015-07-22 |
Family
ID=53573770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520113873.3U Expired - Fee Related CN204494457U (en) | 2015-02-17 | 2015-02-17 | A kind of pulverized coal preheating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204494457U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613490A (en) * | 2015-02-17 | 2015-05-13 | 无锡昊瑜节能环保设备有限公司 | Pulverized coal preheater |
| CN106642186A (en) * | 2016-11-27 | 2017-05-10 | 宁波高新区世代能源科技有限公司 | Desulfurization and denitrification method for excessive pure-oxygen combustion in coal combustion |
| CN111140868A (en) * | 2018-11-06 | 2020-05-12 | 中国科学院工程热物理研究所 | Built-in back-mixed pulverized coal self-heating method and equipment, and pulverized coal self-heating burner |
-
2015
- 2015-02-17 CN CN201520113873.3U patent/CN204494457U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613490A (en) * | 2015-02-17 | 2015-05-13 | 无锡昊瑜节能环保设备有限公司 | Pulverized coal preheater |
| CN104613490B (en) * | 2015-02-17 | 2017-05-24 | 杭州萧越热电有限公司 | Pulverized coal preheater |
| CN106642186A (en) * | 2016-11-27 | 2017-05-10 | 宁波高新区世代能源科技有限公司 | Desulfurization and denitrification method for excessive pure-oxygen combustion in coal combustion |
| CN106642186B (en) * | 2016-11-27 | 2019-04-12 | 宁波高新区世代能源科技有限公司 | Coal-fired excess pure oxygen burning desulphurization denitration processing method |
| CN111140868A (en) * | 2018-11-06 | 2020-05-12 | 中国科学院工程热物理研究所 | Built-in back-mixed pulverized coal self-heating method and equipment, and pulverized coal self-heating burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 Termination date: 20160217 |