CN202709168U - Pulverized coal boiler bellows with automatic ash discharging function - Google Patents
Pulverized coal boiler bellows with automatic ash discharging function Download PDFInfo
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- CN202709168U CN202709168U CN 201220333237 CN201220333237U CN202709168U CN 202709168 U CN202709168 U CN 202709168U CN 201220333237 CN201220333237 CN 201220333237 CN 201220333237 U CN201220333237 U CN 201220333237U CN 202709168 U CN202709168 U CN 202709168U
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- bellows
- ash
- boiler
- pulverized
- coal fired
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Abstract
The utility model discloses a pulverized coal boiler bellows with an automatic ash discharging function. The pulverized coal boiler bellows comprises a secondary bellows of a pulverized coal boiler and an automatic ash discharging device. A boiler water-cooled wall is connected with the secondary bellows. The automatic ash discharging device comprises a conical hopper, an automatic pressure control device and an ash discharging pipe, wherein the conical hopper is communicated with the secondary bellows, the automatic pressure control device is arranged in a connecting pipe between the conical hopper and the ash discharging pipe, and the ash discharging pipe is communicated with the boiler water-cooled wall. The pulverized coal boiler bellows with the automatic ash discharging function is simple in structure and low in cost, the problem of ash accumulation in the secondary bellows of a boiler with opposite front wall and back wall can be solved effectively, existing structures of the boiler cannot be affected, and integral arrangement of the boiler cannot be affected. The pulverized coal boiler bellows has long service life and high operability and reliability, and safety and economy in running of the boiler can be improved effectively.
Description
Technical field
The utility model relates to a kind of boiler bellows, relates in particular to a kind of band from the pulverized-coal fired boiler bellows of ash discharge function, belongs to boiler bellows technical field.
Background technology
The arrangement that turbulent burner is commonly used mainly contains: front wall collocation, opposed firing and interlaced arrangement.During front and back wall cross collocation, if two burner load deviation that liquidate are larger, the both walls of not arranging burner, its water-cooling wall middle heat load is higher, easily causes slagging scorification or overheated.At present, the existing hundreds of platform 600MW of China and above capacitance grade boiler are put into commercial operation, are greatly the opposed firing boiler and wherein have.Secondary air box and the water-cooling wall of opposed firing boiler are fixed, expand with water-cooling wall, boiler is through behind the long-play, take in the secondary air box of boiler having the rotary regenerative air heater of a large amount of flying dusts from boiler tail, the thin ash of small part that enters in the secondary air box can return burner hearth from the burner air port with hot blast, remaining ash then can deposit in secondary air box, until dust stratification.From situation about knowing, the dust stratification degree is relevant with boiler operatiopn time length with power plant's burning coal, the power plant that some running time is long, and dust stratification thickness reaches 2m～3m in its secondary air box, even in the boiler that running time is shorter, its secondary air box also there be about 10cm dust stratification thickness.A large amount of ashes amasss in secondary air box, and the risk that will make bellows occur sinking or cave in is brought economic loss, also will have influence on simultaneously the distribution of secondary air box flow field, thereby jeopardize security and the economy of boiler operatiopn.
The utility model content
The purpose of this utility model is: the pulverized-coal fired boiler bellows of a kind of band from the ash discharge function are provided, improve security and the economy of boiler operatiopn, solve existing pulverized-coal fired boiler secondary air box dust stratification problem, and cause that too much bellows sink or cave in and affect the technical problem of bellows flow field distribution owing to overstocking flying dust, thereby can effectively solve above-mentioned problems of the prior art.
The purpose of this utility model is to realize by following technical proposals: a kind of band is from the pulverized-coal fired boiler bellows of ash discharge function, the secondary air box and the automatic ash discharging device that comprise pulverized-coal fired boiler, a boiler water wall links to each other with secondary air box, automatic ash discharging device comprises taper bucket, automatic pressure headstock gear and removing ash pipeline, described taper bucket is connected with secondary air box and communicates, the automatic pressure headstock gear is located in the connecting pipe of taper bucket and removing ash pipeline, and described removing ash pipeline is connected with boiler water wall and communicates.
As a kind of optimal way, described automatic pressure headstock gear comprises gravity block and turnover panel, and described turnover panel is located in the connecting pipe of taper bucket and removing ash pipeline, and gravity block and turnover panel form the balanced lever take the tube wall place as fulcrum.
As another optimal way, described automatic pressure headstock gear is induction type gravity control valve.
As further preferred, also comprise the purging joint, described purging joint is communicated with removing ash pipeline, and it is parallel with the pipeline of removing ash pipeline to purge joint.
As a kind of optimal way, described taper bucket is the pyramidal structure of conical structure or polygon bottom surface.
As further preferred, the cone bucket that described taper bucket is square or rectangular bottom surface.
As further preferred, described taper bucket is located at the secondary air box porch, and the bellows both sides are respectively established one.This set-up mode is the preferential position of selecting, and does not get rid of to be arranged on other places, only is arranged on both sides, also may be more, such as for larger bellows, consider for structure and layout, and two little ash exhausters can respectively be set in both sides.
Compared with prior art, the beneficial effects of the utility model: the utility model band is simple from the pulverized-coal fired boiler bellows structure of ash discharge function, cost is low, can effectively solve the problem of present opposed firing boiler secondary bellows dust stratification, can not affect the present existing structure of boiler, not affect the layout of boiler integral body simultaneously, possess the ability of long-time use, have stronger operability and reliability, security and economy that can the Effective Raise boiler operatiopn.
Description of drawings
Fig. 1 is that the utility model band is from the structural representation of the pulverized-coal fired boiler bellows of ash discharge function;
Fig. 2 is the structural representation of automatic ash discharging device among Fig. 2;
Fig. 3 is the schematic diagram of the utility model band after the pulverized-coal fired boiler bellows of ash discharge function are installed.
Among the figure: 1-taper bucket, 2-gravity block, 3-removing ash pipeline, 4-turnover panel, 5-purges joint, 6-boiler water wall, 7-secondary air box, 8-burner, 9-automatic pressure headstock gear, 10-automatic ash discharging device, 11-secondary air box entrance.
The specific embodiment
Below in conjunction with specific embodiments and the drawings the utility model is further described.
Disclosed all features in this specification, or the step in disclosed all methods or the process, except the speciality and/or step of mutual repulsion, all can make up by any way, unless special narration all can be replaced by other equivalences or the alternative features with similar purpose, namely, unless special narration, an embodiment in a series of equivalences of each feature or the similar characteristics.
As shown in Figure 3, the utility model band comprises secondary air box 7 and the automatic ash discharging device 10 of pulverized-coal fired boiler from the pulverized-coal fired boiler bellows of ash discharge function, the boiler water wall that links to each other with secondary air box, automatic ash discharging device 10 expands together in company with secondary air box 7 and boiler water wall 6.Automatic ash discharging device 10 comprises taper bucket 1, automatic pressure headstock gear 9 and removing ash pipeline 3, described taper bucket 1 is connected with secondary air box 7 and communicates, automatic pressure headstock gear 9 is located in the connecting pipe of taper bucket 1 and removing ash pipeline 3, described removing ash pipeline 3 is connected with boiler water wall 6 and communicates, between the normal operating period, because the impact of negative pressure is conducive to ash and returns burner hearth in the burner hearth.
Embodiment 1:
As shown in Figure 1 and Figure 2, described automatic pressure headstock gear 9 comprises gravity block 2 and turnover panel 4, and described turnover panel 4 is located in the connecting pipe of taper bucket 1 and removing ash pipeline 3, gravity block 2 and the balanced lever of turnover panel 4 formation take the tube wall place as fulcrum.One or more also is set purges joint 5, described purging joint 5 is communicated with removing ash pipeline 3, and it is parallel with the pipeline of removing ash pipeline 3 to purge joint 5, if find that stifled grey situation is arranged in the pipeline, can connect at any time compressed air and purge; When not needing to purge, but the valve on the shut-down purge joint.
Because most of dust stratification of opposed firing boiler secondary bellows accumulates in secondary air box entrance 11 places, therefore, automatic ash discharging device 10 is arranged in secondary air box porch 11 near the zone of boiler side wall, each one of left and right sides, by this device return to burner hearth wind ash mixture can to lower floor the burner combustion of close side wall play the effect of part oxygenating, be conducive to the burning of boiler, and do not affect the distribution of burner 8 air quantity.The hot blast that is carrying ash enters secondary air box from female pipe of pulverized-coal fired boiler, and enters burner hearth by burner 8 and participate in burning, and automatic ash discharging device is used for collecting the ash that accumulates in the secondary air box and ash is drained into burner hearth by removing ash pipeline.
In the present embodiment, described taper bucket is used for collecting the flying dust of secondary air box, and make flying dust be transmitted back to burner hearth by removing ash pipeline, and being the possibility that the reduce ash accumulates at taper bucket regional area, the taper bucket adopts the pyramidal structure of conical structure or polygon bottom surface.Furthermore, the cone bucket that described taper bucket is square or rectangular bottom surface, this moment, processing was more prone to, thereby also cost-saved.
Turnover panel and gravity block are structure as a whole, and be used for to guarantee to close removing ash pipeline, in order to avoid the interior hot blast of bellows enters boiler furnace by removing ash pipeline in the time can arranging without enough ashes in the secondary air box.When ash amount in the taper bucket is large, because of the weight of the ash weight greater than gravity block, turnover panel will be opened ash discharge automatically, and when ash discharge to a certain extent the time, the weight of ash is less than the weight of gravity block, then turnover panel autoshutdown.
Embodiment 2:
Described automatic pressure headstock gear 9 is induction type gravity control valve, establish an induction type gravity control valve of realizing valve function by the weight induction device in the porch of removing ash pipeline, when the weight induction device is sensed on it flying dust weight and is surpassed setting value, just automatically start, open valve, so that flying dust is discharged from removing ash pipeline, be closed condition if the weight induction device is not sensed when surpassing the weight that sets value.Prevent that the hot blast in the bellows from entering boiler furnace by removing ash pipeline.In addition, in the present embodiment, one or more purging joints can be set also, if find that stifled grey situation is arranged in the pipeline, can connect at any time compressed air and purge; When not needing to purge, but the valve on the shut-down purge joint.
In addition, automatic pressure headstock gear 9 can also be other valves that can play same function etc.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. a band is from the pulverized-coal fired boiler bellows of ash discharge function, the secondary air box (7) that comprises pulverized-coal fired boiler, a boiler water wall (6) links to each other with secondary air box (7), it is characterized in that: also comprise automatic ash discharging device (10), automatic ash discharging device (10) comprises taper bucket (1), automatic pressure headstock gear (9), and removing ash pipeline (3), described taper bucket (1) is connected with secondary air box (7) and communicates, automatic pressure headstock gear (9) is located in the connecting pipe of taper bucket (1) and removing ash pipeline (3), and described removing ash pipeline (3) is connected with boiler water wall (6) and communicates.
2. band as claimed in claim 1 is from the pulverized-coal fired boiler bellows of ash discharge function, it is characterized in that: described automatic pressure headstock gear (9) comprises gravity block (2) and turnover panel (4), described turnover panel (4) is located in the connecting pipe of taper bucket (1) and removing ash pipeline (3), gravity block (2) and the balanced lever of turnover panel (4) formation take the tube wall place as fulcrum.
3. band as claimed in claim 1 is characterized in that from the pulverized-coal fired boiler bellows of ash discharge function: described automatic pressure headstock gear (9) is induction type gravity control valve.
Such as the described band of arbitrary claim in claim 2 or 3 from the pulverized-coal fired boiler bellows of ash discharge function, it is characterized in that: also comprise purging joint (5), described purging joint (5) is communicated with removing ash pipeline (3), and it is parallel with the pipeline of removing ash pipeline (3) to purge joint (5).
5. band as claimed in claim 1 is characterized in that from the pulverized-coal fired boiler bellows of ash discharge function: described taper bucket (1) is the pyramidal structure of conical structure or polygon bottom surface.
6. band as claimed in claim 5 is characterized in that from the pulverized-coal fired boiler bellows of ash discharge function: described taper bucket (1) is the cone bucket of square or rectangular bottom surface.
7. band as claimed in claim 5 is characterized in that from the pulverized-coal fired boiler bellows of ash discharge function: described taper bucket (1) is located at secondary air box entrance (11) and is located, and the bellows both sides are respectively established one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220333237 CN202709168U (en) | 2012-07-11 | 2012-07-11 | Pulverized coal boiler bellows with automatic ash discharging function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220333237 CN202709168U (en) | 2012-07-11 | 2012-07-11 | Pulverized coal boiler bellows with automatic ash discharging function |
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| Publication Number | Publication Date |
|---|---|
| CN202709168U true CN202709168U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220333237 Expired - Lifetime CN202709168U (en) | 2012-07-11 | 2012-07-11 | Pulverized coal boiler bellows with automatic ash discharging function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075334A (en) * | 2014-06-18 | 2014-10-01 | 华电电力科学研究院 | Method and device used for soot-blowing of secondary air compartment of opposed firing boiler |
| CN109442747A (en) * | 2018-08-31 | 2019-03-08 | 芜湖鸣人热能设备有限公司 | A kind of ash chamber preboiler |
-
2012
- 2012-07-11 CN CN 201220333237 patent/CN202709168U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075334A (en) * | 2014-06-18 | 2014-10-01 | 华电电力科学研究院 | Method and device used for soot-blowing of secondary air compartment of opposed firing boiler |
| CN104075334B (en) * | 2014-06-18 | 2016-08-31 | 华电电力科学研究院 | A kind of ash-blowing method for opposed firing boiler secondary air chamber and device |
| CN109442747A (en) * | 2018-08-31 | 2019-03-08 | 芜湖鸣人热能设备有限公司 | A kind of ash chamber preboiler |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |
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| CX01 | Expiry of patent term |