CN202915390U - Dense phase pneumatic powder feeding system device of boiler - Google Patents
Dense phase pneumatic powder feeding system device of boiler Download PDFInfo
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- CN202915390U CN202915390U CN 201220474287 CN201220474287U CN202915390U CN 202915390 U CN202915390 U CN 202915390U CN 201220474287 CN201220474287 CN 201220474287 CN 201220474287 U CN201220474287 U CN 201220474287U CN 202915390 U CN202915390 U CN 202915390U
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- boiler
- pass valve
- valve control
- cabin
- pipeline
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Abstract
The utility model relates to a dense phase pneumatic powder feeding system device of a boiler. The dense phase pneumatic powder feeding system device of the boiler comprises a fuel cabin, a transiting cabin, a conveying cabin, a feeder, a distributor, a compressed air system, a burner, a control valve, a control cabinet and a pipeline. The compressed air system, the transiting cabin, the conveying cabin, the feeder and the pipeline are connected with the control valve through the pipeline; the fuel cabin is connected with the transiting cabin through the pipeline and the control valve; the transiting cabin is connected with the conveying cabin through the pipeline and the control valve; the conveying cabin and the feeder are connected into a whole; and the feeder utilizes a variable frequency motor to control rotating speed. Content of nitrogen oxides of flue gas of the boiler is reduced by 10-30%, pulverized coal sufficiently burns at a high speed, and denitration cost of the flue gas is correspondingly reduced by 5-20% by utilizing a dense phase to feed powders and combining with reasonable combustion adjustment. The dense phase pneumatic powder feeding system device of the boiler has the advantages of being obvious in environmental benefit and economic benefit, capable of being widely applied to improvement of the existing boiler and also capable of being used as a beneficial reference of a new boiler combustion design.
Description
Technical field
The utility model relates to coal dust air-transport system and the device of a kind of industry and station boiler, especially a kind of boiler concentrated phase strength powder feed system device.
Background technology
General pulverized-coal fired boiler fuel delivery system mainly contains two kinds: a kind of is the pulverized coal carried by hot air mode, its flow process be coal dust in the Pulverized Coal Bin in machine supplying powder falls into powder feeding pipes, carried by hot blast and to send into hearth combustion.Another kind is the direct-firing powder feed system of malleation, and its groundwork flow process is that raw coal heats in coal pulverizer, pulverizes, grinds by pipeline and directly send into hearth combustion.At present, heat power plant boiler adopts above two kinds of fuel to carry and combustion system, mainly exists in the process of coal combustion Nox growing amount higher, the problems such as hearth combustion concentration deficiency, and the existence of these problems can't be satisfied the requirement of denitrating flue gas environmental protection.
Goal of the invention
The purpose of this utility model provides a kind of boiler concentrated phase strength powder feed system device, for the shortcoming that prior art exists, coal dust is sent into the boiler furnace burning with higher concentration, reduces boiler Nox content, improves boiler combustion efficiency.
Summary of the invention
The utility model purpose is achieved in that the strength powder feeding of boiler concentrated phase and combustion system, is comprised of Bunker, middle roll-over, conveying storehouse, dispenser, distributor, compressed air system, burner, by-pass valve control, switch board and pipeline thereof.Compressed air system is connected with valve with middle roll-over, conveying storehouse, dispenser and device for cleaning pipeline piping thereof, Bunker is connected by pipeline and valve with intermediate bin, middle roll-over is connected by pipeline and valve with carrying the storehouse, carry storehouse and dispenser to connect as one, dispenser adopts variable-frequency motor control rotating speed.Operation principle of the present utility model and flow process are: by-pass valve control is opened between Bunker and the middle roll-over, fuel enters middle roll-over from Bunker, rear by-pass valve control autoshutdown is filled in middle roll-over, by-pass valve control is opened between middle roll-over and the conveying storehouse, fuel in the intermediate bin enters carries the storehouse, when carrying the storehouse to reach certain material level, starts dispenser, fuel enters distributor through dispenser, and compressed air is delivered to burner with fuel gasification by lateral and enters hearth combustion.The gas-powder ratio of coal dust is 1 in this combustion system: 8-1: 11.Adjust the dispenser rotating speed and can adjust feeding coal.Valve between each storehouse is controlled material level in the storehouse automatically, guarantee continuously, evenly, can control feed.
The beneficial effects of the utility model are: can realize the specification requirement of boiler positive pressuring combustion, supply with for pressure combustion in future boiler provides reliable fuel.The coal dust that fineness is qualified is through strength powder feed system and device, send into hearth combustion with higher concentration, the breeze airflow of higher concentration enters the combustion chemistry reaction atmosphere that forms higher concentration behind the burner hearth, can improve coal dust firing speed and efficiency of combustion like this, under the operating mode of approximate anoxycausis, suppress the generation of Nox, thereby reduce Nox content in the boiler original flue gas, realize the normal operation of boiler devulcanizer, reach the fume environment protection qualified discharge, alleviate environmental pollution and reduce the denitrating flue gas cost.Adopt the concentrated phase powder feeding, and after being equipped with rational burning adjustment, the fully high-speed burning of boiler smoke Nox content 10%-30%, coal dust, the corresponding reduction of denitrating flue gas cost 5%-20%.Have obvious environmental benefit and economic benefit, can be widely used in the transformation of existing boiler, having when also can be used as the newly constructed boiler fuel design need reference.
Description of drawings
Fig. 1 is structural representation of the present utility model.
1 is that Bunker, 2 is that middle roll-over, 3 is that conveying storehouse, 4 is that dispenser, 5 is that distributor, 6 is that compressed air system, 7 is that burner, 8 is that by-pass valve control, 9 is that by-pass valve control, 10 is that by-pass valve control, 11 is that by-pass valve control, 12 is that by-pass valve control, 13 is switch board among the figure.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing; The strength powder feeding of boiler concentrated phase and combustion system are comprised of Bunker (1), middle roll-over (2), conveying storehouse (3), dispenser (4), distributor (5), compressed air system (6), burner (7), by-pass valve control (8), by-pass valve control (9), by-pass valve control (10), by-pass valve control (11), by-pass valve control (12), switch board 13.Compressed air system (6) is connected with by-pass valve control (10), by-pass valve control (11), by-pass valve control (12) by pipeline with middle roll-over (2), conveying storehouse (3), dispenser (4), Bunker (1) is connected by pipeline and by-pass valve control (8) with middle roll-over (2), middle roll-over (2) is connected by pipeline and by-pass valve control (9) with carrying storehouse (3), carry storehouse (3) and dispenser (4) to connect as one, dispenser (4) adopts variable-frequency motor control rotating speed.Its operation principle of the utility model and flow process are: by-pass valve control (8) is opened between Bunker (1) and the middle roll-over (2), fuel enters middle roll-over (2) from Bunker (1), rear by-pass valve control (8) autoshutdown is filled in middle roll-over (2), then by-pass valve control (9) is opened between middle roll-over (2) and the conveying storehouse (3), fuel in the middle roll-over (2) enters carries storehouse (3), carry storehouse (3) when reaching certain material level, start dispenser (4), fuel enters distributor (5) through dispenser (4), and compressed air is delivered to 1 burner (7) with fuel gasification by lateral and enters hearth combustion.The gas-powder ratio of coal dust is 1 in this combustion system: 8-1: 11.Adjust dispenser (4) rotating speed capable of regulating feeding coal, the automatic control interval feed of by-pass valve control between Bunker (1), middle roll-over (2) and conveying each storehouse, storehouse (3).Keep in the storehouse material level suitable, guarantee continuously, even, can control feed.By-pass valve control (8), by-pass valve control (9), by-pass valve control (10), by-pass valve control (11), by-pass valve control (12) be Access Control cabinet (13) all, by automatically control of switch board (13).
The utility model can be widely used in various industry and station boiler, this fuel mode of movement can be used as the useful of existing fuel conveying combustion system and replenishes, and native system can obviously reduce boiler Nox content, improve boiler combustion efficiency, reduce Denitration in Boiler operating cost.The utility model has been realized the specification requirement of boiler positive pressuring combustion, for pressure combustion in future boiler provides reliable fuel supply technology and equipment thereof.Can also realize the boiler few-oil ignition with the torch oil gun combination, thus the fuel consume when saving boiler startup.
Claims (2)
1. boiler concentrated phase strength powder feed system device, it comprises Bunker (1), middle roll-over (2), carry storehouse (3), dispenser (4), distributor (5), compressed air system (6), burner (7), by-pass valve control (8), by-pass valve control (9), by-pass valve control (10), by-pass valve control (11), by-pass valve control (12), switch board (13) forms, it is characterized in that compressed air system (6) and middle roll-over (2), carry storehouse (3), dispenser (4) is by pipeline and by-pass valve control (10), by-pass valve control (11), by-pass valve control (12) connects, Bunker (1) is connected by pipeline and by-pass valve control (8) with middle roll-over (2), middle roll-over (2) is connected by pipeline and by-pass valve control (9) with carrying storehouse (3), carry storehouse (3) and dispenser (4) to connect as one, dispenser (4) adopts variable-frequency motor control rotating speed.
2. boiler concentrated phase strength powder feed system device according to claim 1, it is characterized in that in by-pass valve control (8), by-pass valve control (9), by-pass valve control (10), by-pass valve control (11), the equal Access Control cabinet (13) of by-pass valve control (12), by automatically control of switch board (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220474287 CN202915390U (en) | 2012-09-06 | 2012-09-06 | Dense phase pneumatic powder feeding system device of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220474287 CN202915390U (en) | 2012-09-06 | 2012-09-06 | Dense phase pneumatic powder feeding system device of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202915390U true CN202915390U (en) | 2013-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220474287 Expired - Fee Related CN202915390U (en) | 2012-09-06 | 2012-09-06 | Dense phase pneumatic powder feeding system device of boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN202915390U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672947A (en) * | 2012-09-06 | 2014-03-26 | 中国石油化工股份有限公司 | Dense-phase powder feeding and burning system for boiler |
-
2012
- 2012-09-06 CN CN 201220474287 patent/CN202915390U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672947A (en) * | 2012-09-06 | 2014-03-26 | 中国石油化工股份有限公司 | Dense-phase powder feeding and burning system for boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20130906 |