CN202747339U - Bottom slag transport system for a circulating fluidized bed boiler with faulty coal as fuel - Google Patents
Bottom slag transport system for a circulating fluidized bed boiler with faulty coal as fuel Download PDFInfo
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- CN202747339U CN202747339U CN 201220369598 CN201220369598U CN202747339U CN 202747339 U CN202747339 U CN 202747339U CN 201220369598 CN201220369598 CN 201220369598 CN 201220369598 U CN201220369598 U CN 201220369598U CN 202747339 U CN202747339 U CN 202747339U
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- slag
- extractor
- slag extractor
- fluidized bed
- type slag
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Abstract
The utility model provides a bottom slag transport system for a circulating fluidized bed boiler with faulty coal as fuel. The circulating fluidized bed boiler comprises a dust remover, a dust remover front smoke flue and a drying type slag extractor arranged on a slag outlet of the burning faulty coal circulating fluidized bed boiler. An inlet of the drying type slag extractor is communicated with a negative pressure smoke flue. The interior of the drying type slag extractor is enabled to be in a negative-pressure state through utilization of the negative-pressure state in the dust remover front smoke flue. Under the action of the negative pressure, controlled environmental cold air reversely enters the interior of the slag extractor, enables dust slag gradually to be cooled through wind in the transport process, and before entering an intermediate slag bin, temperature of bottom slag is reduced below 100 DEG C.
Description
Technical field
The utility model relates to the conveying technology field, particularly a kind of bottom ash conveying system of burning inferior coal CFBB.
Background technology
CFBB is a kind of boiler that adopts the CFBC mode, and therefore the combustion system of this boiler cleaning, efficient and pollute lowly is widely used.The coal-powder boiler quantity of slag is little, and the cooling of end slag, conveying all are easier to realize; In the pulverized coal furnace for negative pressure and directly communicate with the bottom residue extraction mechanism.
The defeated slag of tradition CFBB adopts scrapper conveyor (or bucket machine), bucket elevator to deliver to the slag storehouse, is transported by automobile again.This mode is suitable for the situation that the quantity of slag is little and the slag temperature is low.In case bed drain purge is large, this moment, often the slag temperature can be higher, and under this bad working environments, the fault rates such as scrapper conveyor (or bucket machine), bucket elevator can improve greatly, and simultaneously, Automobile Transportation also is difficult to meet the demands.Therefore the large Capacity Circulating Fluidized Bed Boilers of present domestic burning inferior coal is faced with the embarrassment of large quantity of slag discharging, difficulty of transportation.The CFBB of existing burning low grade coal, its quantity of slag more than 100 tons per/hour.The employing pipe conveyer is carried comparatively ideal in this quantity of slag situation, but pipe conveyer can not bear the high temperature above 100 ℃, causes transporting in large quantity of slag situation very difficult.
The utility model content
The scrapper conveyor that adopts for the existing bottom ash conveying system that is used for the burning inferior coal CFBB or bucket machine can't be applicable to that the large quantity of slag is carried and pipe conveyer can't be applicable to defective and the problem of worst hot case, and the purpose of the utility model embodiment provides and a kind ofly can satisfy the large quantity of slag and carry the bottom ash conveying system that is used for the burning inferior coal CFBB that can be operated in again under the hot environment.
In order to achieve the above object, the utility model embodiment provides following technical scheme: a kind of bottom ash conveying system for the burning inferior coal CFBB, and wherein said circulating fluidized bed boiler comprises deduster and front flue of dust collector; Also comprise: be arranged at the dry-type slag extractor at the slag notch place of described CFBB, described dry-type slag extractor entrance and described negative pressure flue conducting.
Preferred as technique scheme, also comprise be arranged between described dry-type slag extractor and the negative pressure flue and sealing be connected bellows.
Preferred as technique scheme, described dry-type slag extractor also comprises air intake, described air intake is arranged at described dry-type slag extractor both sides.
Preferred as technique scheme also comprises the bucket elevator that is arranged at described dry-type slag extractor exit and the pipe conveyer in exit, middle slag storehouse.
Preferred as technique scheme, described bucket lifting motor spindle is arranged at the exit of described dry-type slag extractor, the top be arranged at described in the middle of porch, slag storehouse.
The bottom ash conveying system that is used for the burning inferior coal CFBB that the utility model embodiment proposes utilizes the negative pressure state in the front flue of dust collector to make the inner negative pressure state that forms of dry-type slag extractor.Under suction function, the reverse slag extractor inside that enters of controlled ambient, cool air is cooled off lime-ash gradually by wind in course of conveying, and slag storehouse slag temperature of the front end is down to below 100 ℃ in the middle of entering.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the bottom ash conveying system that is used for the burning inferior coal CFBB of the utility model embodiment.
The specific embodiment
Below in conjunction with accompanying drawing of the present utility model, the technical solution of the utility model is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, wherein said circulating fluidized bed boiler comprises deduster and front flue of dust collector 1; Also comprise: be arranged at the dry-type slag extractor 2 at the slag notch place of described CFBB, described dry-type slag extractor entrance and 1 conducting of described negative pressure flue.Wherein, as shown in Figure 1, also comprise be arranged between described dry-type slag extractor 2 and the negative pressure flue 1 and sealing be connected bellows 3.As shown in Figure 1, described dry-type slag extractor 2 also comprises air intake 4, and described air intake 4 is arranged at the both sides of described dry-type slag extractor 2.As shown in Figure 1, also comprise the bucket elevator 5 that is arranged at described dry-type slag extractor 2 exits, and the pipe conveyer 7 that is arranged at 6 exits, middle slag storehouse.Described bucket elevator 5 bottoms are arranged at the exit of described dry-type slag extractor 2, and the top is arranged at 6 porch, described middle slag storehouse.
Operation principle of the present utility model is specially:
1, existing front flue of dust collector is negative pressure state under the effect of air-introduced machine, is connected with the dry-type slag extractor porch by bellows herein, can make dry-type slag extractor inside be negative pressure state.This moment, dry-type slag extractor slag temperature of the interior end was cold slag machine outlet temperature, was about 150 ℃.
2, the dry-type slag extractor extraneous air is environment temperature, far below end slag temperature.And residue extraction mechanism presents negative pressure state, and ambient air outside can enter dry-type slag extractor by the air intake that installs additional, and cold air and high-temperature ash are carried out sufficient heat exchange, and air absorbs lime-ash radiant heat and sensible heat, thereby reduces end slag temperature.Further, can also comprise atomization temperature-reduction device; , start this atomization temperature-reduction device and assist cooling when too high (for example far surpassing 150 degree) such as the pomace temperature, guarantee that the slag temperature is reduced to below 100 degree.
3, the air after the heat exchange is siphoned away by the negative pressure in the front flue of dust collector, enters deduster after entering front flue of dust collector, after enter smoke stack emission.
The above; it only is the specific embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion by described protection domain with claim.
Claims (4)
1. bottom ash conveying system that is used for the burning inferior coal CFBB, wherein said CFBB comprises deduster and front flue of dust collector; It is characterized in that, also comprise: be arranged at the dry-type slag extractor at the slag notch place of described CFBB, described dry-type slag extractor entrance and described front flue of dust collector conducting.
2. the bottom ash conveying system for the burning inferior coal CFBB according to claim 1 is characterized in that described dry-type slag extractor also comprises air intake, and described air intake is arranged at described dry-type slag extractor both sides.
3. the bottom ash conveying system for the burning inferior coal CFBB according to claim 1 is characterized in that, also comprises the bucket elevator that is arranged at described dry-type slag extractor exit and the pipe conveyer in exit, middle slag storehouse.
4. the bottom ash conveying system for the burning inferior coal CFBB according to claim 3 is characterized in that described bucket lifting motor spindle is arranged at the exit of described dry-type slag extractor, and the top is arranged at porch, described middle slag storehouse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220369598 CN202747339U (en) | 2012-07-27 | 2012-07-27 | Bottom slag transport system for a circulating fluidized bed boiler with faulty coal as fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220369598 CN202747339U (en) | 2012-07-27 | 2012-07-27 | Bottom slag transport system for a circulating fluidized bed boiler with faulty coal as fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202747339U true CN202747339U (en) | 2013-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220369598 Expired - Fee Related CN202747339U (en) | 2012-07-27 | 2012-07-27 | Bottom slag transport system for a circulating fluidized bed boiler with faulty coal as fuel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202747339U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111290447A (en) * | 2019-12-18 | 2020-06-16 | 国家能源集团谏壁发电厂 | Air leakage control system of dry slag extractor of power plant |
-
2012
- 2012-07-27 CN CN 201220369598 patent/CN202747339U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111290447A (en) * | 2019-12-18 | 2020-06-16 | 国家能源集团谏壁发电厂 | Air leakage control system of dry slag extractor of power plant |
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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 |
Granted publication date: 20130220 Termination date: 20140727 |
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| EXPY | Termination of patent right or utility model |