CN216924344U - Double-channel pulverized coal concentration device - Google Patents
Double-channel pulverized coal concentration device Download PDFInfo
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- CN216924344U CN216924344U CN202122788541.3U CN202122788541U CN216924344U CN 216924344 U CN216924344 U CN 216924344U CN 202122788541 U CN202122788541 U CN 202122788541U CN 216924344 U CN216924344 U CN 216924344U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model relates to coal dust concentration treatment and discloses a double-channel coal dust concentration device which comprises a rectifying channel, a concentration channel provided with a coal dust concentrator, a first coal dust channel and a second coal dust channel, wherein one end of the second coal dust channel is coaxially arranged in the first coal dust channel, the other end of the second coal dust channel is bent to extend out of the first coal dust channel, the second coal dust channel is fixed through a fixing device and a supporting device which are arranged in the first coal dust channel, the fixing device is close to the same shaft end, and the supporting device is close to the other end. The pulverized coal concentrator comprises a central blunt body and swirl vanes which are uniformly distributed between the central blunt body and the wall of the concentrating channel by taking the central blunt body as the center, wherein the first pulverized coal channel is a concentrated pulverized coal channel, and the second pulverized coal channel is a light pulverized coal channel. The utility model has the beneficial effects that: the structure is simple, convenient and effective, the coal powder can be subjected to concentration separation, the concentration proportion can be adjusted, the service life of the device is longer, and the device is easy to overhaul.
Description
Technical Field
The utility model relates to a pulverized coal concentrating device.
Background
The dense-dilute pulverized coal combustion technology is a pulverized coal combustion technology with high combustion efficiency, good stable combustion characteristic and low nitrogen oxide emission, and is widely applied to coal-fired power plants in China. Generally, a coal powder concentrator is adopted to concentrate and separate coal powder, so that the coal powder is better burnt out, NOx emission is reduced, and thick and thin coal powder combustion is realized.
The thick and thin coal powder combustion technology separates coal powder airflow into thick coal powder airflow and thin coal powder airflow for organizational combustion, under the premise that the total amount of primary air is not changed, the coal powder concentration of the thick coal powder airflow is high, the ignition heat is small, ignition and flame propagation of the coal powder airflow are facilitated, meanwhile, the generation amount of nitrogen oxides in the initial stage of combustion of the coal powder airflow under the condition of rich fuel is small, an ignition heat source can be provided for the thin coal powder airflow after the thick coal powder airflow is ignited, the combustion stability of the whole torch is enhanced, the combustion low-load stable combustion capability is good, and the coal type adaptability is strong.
The pulverized coal concentrating device in the prior art has the defects of poor concentrating effect, insecure structure, serious abrasion in the using process, short service life and the like. Therefore, how to improve the concentration effect and the wear resistance of the pulverized coal concentrator, ensure the structural reliability of the pulverized coal concentrator and prolong the service life of the pulverized coal concentrator has important significance.
SUMMERY OF THE UTILITY MODEL
In order to improve the concentration effect of the pulverized coal concentrator, the utility model provides a double-channel pulverized coal concentrating device with an improved structure.
The technical scheme adopted by the utility model for solving the technical problems is as follows: binary channels buggy enrichment facility, characterized by: the coal dust concentrating device comprises a rectifying channel, a concentrating channel, a first coal dust channel and a second coal dust channel, wherein the rectifying channel, the concentrating channel, the first coal dust channel and the first coal dust channel are sequentially connected, one end of the second coal dust channel is coaxially arranged in the first coal dust channel, the other end of the second coal dust channel is bent to extend out of the first coal dust channel, the second coal dust channel is fixed through a fixing device and a supporting device which are arranged in the first coal dust channel, the fixing device is close to the same shaft end, and the supporting device is close to the other end.
The pulverized coal concentrator comprises a central blunt body and swirl vanes which are uniformly distributed between the central blunt body and the wall of the concentrating channel by taking the central blunt body as the center, wherein the first pulverized coal channel is a concentrated pulverized coal channel, and the second pulverized coal channel is a light pulverized coal channel.
And a baffle plate with adjustable opening degree is arranged in the second pulverized coal channel.
The rectifying channel is a straight pipe with a cross rectifying structure arranged at the center, and the pipeline can be a round pipe, a square round joint and the like.
The rectifying channel, the concentrating channel and the first coal powder channel are sequentially connected through flanges.
The first pulverized coal channel, the second pulverized coal channel, the fixing device and the supporting device are integrally formed by silicon carbide.
The windward side of the pulverized coal concentrator is the SIC ceramic surface.
The fixing device is a concentric ring supported between the inner wall of the first coal powder channel and the outer wall of the second coal powder channel, and ribs are arranged between the concentric rings.
The supporting device is a supporting plate arranged along the flow direction of the pulverized coal.
And an included angle between the flow directions of the first pulverized coal channel outlet and the second pulverized coal channel outlet is an acute angle.
The utility model has the beneficial effects that: the structure is simple, convenient and effective, the coal powder can be subjected to concentration separation, the concentration proportion can be adjusted, the service life of the device is longer, and the device is easy to overhaul.
Drawings
Fig. 1 is a schematic view of the overall structure of the two-channel pulverized coal concentrating device of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
Fig. 3 is a front view of the fixture of fig. 1.
Fig. 4 is a front view of the support device of fig. 1.
Labeled as: the coal powder concentrator comprises 1-a rectifying channel, 2-a coal powder concentrator, 3-a concentrating channel, 4-a first coal powder channel, 5-a second coal powder channel, 6-a connecting flange, 7-a fixing device, 8-a supporting device, 9-an adjusting baffle, 21-a central blunt body, 22-a swirl blade, 11-a cross rectifying plate, 71-a rib and 81-a supporting plate.
Detailed Description
The utility model is further illustrated with reference to the following figures and examples.
As shown in fig. 1, 2, 3 and 4, the dual-channel pulverized coal concentrating device of the present invention includes a rectifying channel 1, a concentrating channel 3 with a pulverized coal concentrator 2, a first pulverized coal channel 4, and a second pulverized coal channel 5, one end of which is coaxially arranged in the first pulverized coal channel 4 with the first pulverized coal channel 4 and the other end of which is bent to extend out of the first pulverized coal channel 4, the second pulverized coal channel 5 is fixed by a fixing device 7 and a supporting device 8 arranged in the first pulverized coal channel 4, wherein the fixing device 7 is close to the same shaft end, and the supporting device 8 is close to the other end. The rectifying channel can be used for stabilizing the coal dust airflow conveyed by an upstream coal dust pipeline, and is favorable for improving the concentration effect of the coal dust concentrator positioned at the downstream of the rectifying channel. The fixing devices and the supporting devices at the front part and the rear part of the second coal powder channel 5 can reliably fix the central light coal powder channel, prevent the light coal powder channel from shaking caused by the impact of upstream coal powder airflow, and prolong the service life of the light coal powder channel.
As shown in fig. 1, the pulverized coal concentrator 2 of the present invention includes a central bluff body 21 and swirl vanes 22 uniformly distributed between the central bluff body 21 and the channel walls of the concentrating channel 3 with the central bluff body 21 as the center, the pulverized coal is centrifugally separated from primary air by the centrifugal force generated by the central bluff body 21 and the swirl vanes 22, after the pulverized coal airflow entering the concentrating channel 3 passes through the pulverized coal concentrator, the pulverized coal airflow with thick outside and thin inside respectively enters a light pulverized coal channel and a thick pulverized coal channel, the first pulverized coal channel 4 is a thick pulverized coal channel, and the second pulverized coal channel 5 is a light pulverized coal channel, and the structure is simple. The leading-out of the light coal powder concentrates the rest primary air-powder airflow, so that the coal powder concentration at the outlet of the coal powder nozzle is greatly improved, the ignition point is reduced, the required ignition heat is reduced, and the rapid ignition and stable combustion of inferior fuel are greatly facilitated.
As shown in fig. 1, a baffle 9 with an adjustable opening is arranged in the second pulverized coal channel 5, and the resistance change of the thick pulverized coal airflow and the thin pulverized coal airflow is controlled by changing the opening of the baffle, so that the purpose of adjusting the concentration of pulverized coal at the thick pulverized coal side can be achieved, and the change of the coal quality and the combustion requirement can be adapted.
As shown in fig. 1 and 2, the rectifying passage 1 is a straight pipe with a cross rectifying plate 11 arranged at the center, the cross section of the straight pipe can be a round pipe, a square round joint and the like, and the rectifying plate can also be a cross rectifying plate, but the cross rectifying plate with a simpler structure can meet the use requirement by testing the improvement of the concentration separation effect of the cross rectifying plate with a cross shape.
As shown in fig. 1, the rectifying channel 1, the concentrating channel 3 and the first pulverized coal channel 4 are sequentially connected by flanges, so that each part of the device can be conveniently overhauled and replaced.
Furthermore, the first pulverized coal channel 4, the second pulverized coal channel 5, the fixing device 7 and the supporting device 8 are integrally formed by silicon carbide, so that the structural reliability of the pulverized coal channel can be improved.
Similarly, the windward side of the pulverized coal concentrator 2 is the SIC ceramic surface, the central bluff body 21 and the blades 22 can be integrally SIC ceramic, or the windward sides of the central bluff body 21 and the blades 22 can be provided with SIC ceramic protective panels.
As shown in fig. 1 and 3, the fixing means 7 is preferably concentric rings supported between the inner wall of the first pulverized coal passageway 4 and the outer wall of the second pulverized coal passageway 5 according to the shape of the duct, and ribs 71 are provided between the concentric rings, so that the supporting stability and the supporting strength thereof can satisfy the requirements, and at the same time, the influence on the pulverized coal flow is small.
As shown in fig. 1 and 4, the supporting device 8 is a supporting plate 81 arranged along the flow direction of the pulverized coal, and both the supporting stability and the supporting strength of the supporting device can meet the requirements, and meanwhile, the supporting device has small influence on the pulverized coal airflow.
As shown in fig. 1, an included angle between the flow directions of the first pulverized coal passage outlet and the second pulverized coal passage outlet is an acute angle.
The embodiment is as follows:
as shown in fig. 1, 2, 3 and 4, the dual-channel pulverized coal concentrating device of the present invention includes a rectifying channel 1, a concentrating channel 3 equipped with a pulverized coal concentrator 2, and a first pulverized coal channel 4, which are flange-connected in sequence, one end of a second pulverized coal channel 5 is located in the first pulverized coal channel 4 and is coaxially arranged with the first pulverized coal channel 4, the other end of the second pulverized coal channel 5 is bent to extend out of the first pulverized coal channel 4, and an included angle between flow directions of an outlet of the first pulverized coal channel and an outlet of the second pulverized coal channel is an acute angle, so as to be conveniently connected with a finished product combustor. The front part of the second pulverized coal channel 5 close to the same shaft end is provided with concentric rings supported between the inner wall of the first pulverized coal channel 4 and the outer wall of the second pulverized coal channel 5, ribs 71 are arranged between the concentric rings, and the rear part of the second pulverized coal channel 5 close to the other end is provided with a supporting plate 81 arranged along the pulverized coal flow direction. The concentric ring and the support plate 81 serve as a fixing means and a supporting means, respectively, for securely fixing the second pulverized coal passageway 5 to the first pulverized coal passageway 4.
The rectifying channel 1 is a straight pipe with a cross rectifying plate 11 arranged at the center, the cross section of the straight pipe is a circular pipe, the pulverized coal concentrator 2 comprises a central blunt body 21 and swirl blades 22 which are uniformly distributed between the central blunt body 21 and the channel walls of the concentrating channel 3 by taking the central blunt body 21 as the center, the central blunt body 21 and the swirl blades 22 are integrally formed by SIC ceramics, a first pulverized coal channel 4, a second pulverized coal channel 5, a fixing device 7 and a supporting device 8 are integrally formed by silicon carbide, the first pulverized coal channel 4 is a concentrated pulverized coal channel, the second pulverized coal channel 5 is a light pulverized coal channel, and a baffle plate 9 with adjustable opening degree is arranged in the second pulverized coal channel 5.
The device has a simple structure, can separate the coal powder into different colors, and concentrates the coal powder airflow to a concentration level suitable for ignition, thereby being beneficial to rapid ignition and stable combustion of inferior fuel; the windward side of the coal dust concentrator adopts SIC ceramics, so that the wear resistance and the service life of the coal dust concentrator can be greatly improved; the channels of the thick coal powder and the thin coal powder are formed by adopting integral silicon carbide, and a fixing device and a supporting device are reasonably designed between the channel of the thin coal powder and the channel of the thick coal powder, so that the structural reliability of the coal powder is ensured. The pulverized coal concentration device adopts a flange connection structure form among all parts, so that the pulverized coal concentration device is convenient to overhaul and replace; the outlet of the light coal powder channel is provided with an adjusting baffle plate, and the concentration of the coal powder on the side of the thick coal powder can be adjusted according to the combustion condition.
Claims (10)
1. Binary channels buggy enrichment facility, characterized by: including rectifying channel (1) that connects gradually, install concentrated passageway (3) of buggy concentrator (2), first buggy passageway (4) and one end and first buggy passageway (4) coaxial arrangement in first buggy passageway (4) and the other end bending stretch out second buggy passageway (5) of first buggy passageway (4), second buggy passageway (5) are fixed through fixing device (7) and strutting arrangement (8) that set up in first buggy passageway (4), wherein fixing device (7) are close with the axle head, strutting arrangement (8) are close the other end.
2. The dual-channel pulverized coal concentrating device as claimed in claim 1, wherein: the pulverized coal concentrator (2) comprises a central blunt body (21) and swirl vanes (22) which are uniformly distributed between the central blunt body (21) and the wall of the concentrated passage (3) by taking the central blunt body (21) as the center, wherein the first pulverized coal passage (4) is a concentrated pulverized coal passage, and the second pulverized coal passage (5) is a light pulverized coal passage.
3. The dual-channel pulverized coal concentrating device as claimed in claim 2, wherein: and a baffle (9) with adjustable opening degree is arranged in the second pulverized coal channel (5).
4. The double-channel pulverized coal concentrating device as claimed in claim 1, 2 or 3, wherein: the rectifying channel (1) is a straight pipe with a cross rectifying plate (11) arranged at the center.
5. The double-channel pulverized coal concentrating device as claimed in claim 1, 2 or 3, wherein: the rectifying channel (1), the concentrating channel (3) and the first coal powder channel (4) are sequentially connected through flanges.
6. The double-channel pulverized coal concentrating device as claimed in claim 1, 2 or 3, wherein: the first pulverized coal channel (4), the second pulverized coal channel (5), the fixing device (7) and the supporting device (8) are integrally formed by silicon carbide respectively.
7. The dual-channel pulverized coal concentrating device as claimed in claim 6, wherein: the fixing device (7) is a concentric ring supported between the inner wall of the first coal dust channel (4) and the outer wall of the second coal dust channel (5), and ribs (71) are arranged between the concentric rings.
8. The dual channel pulverized coal concentrating device as claimed in claim 6, wherein: the supporting device (8) is a supporting plate (81) arranged along the flow direction of the pulverized coal.
9. The double-channel pulverized coal concentrating device as claimed in claim 1, 2 or 3, wherein: the windward side of the pulverized coal concentrator (2) is a SIC ceramic surface.
10. The double-channel pulverized coal concentrating device as claimed in claim 1, 2 or 3, wherein: and an included angle between the flow directions of the first pulverized coal channel outlet and the second pulverized coal channel outlet is an acute angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122788541.3U CN216924344U (en) | 2021-11-15 | 2021-11-15 | Double-channel pulverized coal concentration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122788541.3U CN216924344U (en) | 2021-11-15 | 2021-11-15 | Double-channel pulverized coal concentration device |
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| Publication Number | Publication Date |
|---|---|
| CN216924344U true CN216924344U (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122788541.3U Active CN216924344U (en) | 2021-11-15 | 2021-11-15 | Double-channel pulverized coal concentration device |
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| CN (1) | CN216924344U (en) |
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2021
- 2021-11-15 CN CN202122788541.3U patent/CN216924344U/en active Active
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