CN103672947A - Dense-phase powder feeding and burning system for boiler - Google Patents

Dense-phase powder feeding and burning system for boiler Download PDF

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Publication number
CN103672947A
CN103672947A CN201210349531.2A CN201210349531A CN103672947A CN 103672947 A CN103672947 A CN 103672947A CN 201210349531 A CN201210349531 A CN 201210349531A CN 103672947 A CN103672947 A CN 103672947A
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CN
China
Prior art keywords
valve control
pass valve
over
storehouse
boiler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201210349531.2A
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Chinese (zh)
Inventor
姬广勤
马玉峰
陈振华
石天佐
孔令先
巩汉强
张乃良
李彦明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENGLI POWER PLANT OF SINOPEC SHENGLI PETROLEUM ADMINISTRATION BUREAU
China Petroleum and Chemical Corp
Original Assignee
SHENGLI POWER PLANT OF SINOPEC SHENGLI PETROLEUM ADMINISTRATION BUREAU
China Petroleum and Chemical Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHENGLI POWER PLANT OF SINOPEC SHENGLI PETROLEUM ADMINISTRATION BUREAU, China Petroleum and Chemical Corp filed Critical SHENGLI POWER PLANT OF SINOPEC SHENGLI PETROLEUM ADMINISTRATION BUREAU
Priority to CN201210349531.2A priority Critical patent/CN103672947A/en
Publication of CN103672947A publication Critical patent/CN103672947A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a dense-phase powder feeding and burning system for a boiler. The system is composed of a fuel bin, a transfer bin, a delivery bin, a feeder, a distributor, a compressed air system, a burner, control valves, a control bin and pipes. The compressed air system, the transfer bin, the delivery bin and the feeder are connected with the control valves through pipes. The fuel bin and the transfer bin are connected through the pipe and the control valve, the transfer bin and the delivery bin are connected through the pipe and the control valve, the delivery bin and the feeder are integrally connected, and the rotation speed of the feeder is controlled through a variable-frequency motor. According to the system, dense-phase feeding is used, and after the reasonable burning adjusting, the boiler flue gas Nox content is reduced by 10% to 30%, pulverized coal is burnt fully and rapidly, and the flue gas de-nitrification costs is reduced by 5% to 20% correspondingly; apparent environment-friendly benefits and economic benefits are provided, the system can be widely used in improvement of prior boilers and can be used as beneficial reference during newly built boiler burning design.

Description

The strength powder feeding of boiler concentrated phase and combustion system
Technical field
The present invention 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 feeding and combustion system.
Background technology
General pulverized-coal fired boiler fuel delivery system mainly contains two kinds: a kind of is pulverized coal carried by hot air mode, its flow process be coal dust in Pulverized Coal Bin in machine supplying powder falls into powder feeding pipes, by hot blast, carry and 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, pulverizes, grinds by pipeline and directly send into hearth combustion in coal pulverizer.At present, heat power plant boiler adopts above two kinds of fuel to carry and combustion system, mainly exists in process of coal combustion Nox growing amount higher, the problems such as hearth combustion concentration deficiency, and the existence of these problems cannot meet the requirement of denitrating flue gas environmental protection.
Goal of the invention
The object of this invention is to provide a kind of boiler concentrated phase strength powder feeding and combustion system, the shortcoming existing for prior art, sends into boiler furnace burning by coal dust with higher concentration, reduces boiler Nox content, improves boiler combustion efficiency.
Summary of the invention
The present invention seeks to realize like this: the strength powder feeding of boiler concentrated phase and combustion system, by Bunker, in roll-over, carry storehouse, dispenser, distributor, compressed air system, burner, by-pass valve control, switch board and pipeline thereof to be formed.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 storehouse, carry storehouse and dispenser to connect as one, dispenser adopts variable-frequency motor to control rotating speed.Operation principle of the present invention and flow process are: between Bunker and middle roll-over, by-pass valve control is opened, fuel enters middle roll-over from Bunker, middle roll-over is filled rear by-pass valve control and is automatically closed, between middle roll-over and conveying storehouse, by-pass valve control is opened, fuel in intermediate bin enters carries storehouse, while carrying storehouse to reach certain material level, starts dispenser, fuel enters distributor through dispenser, and compressed air is delivered to burner by fuel gasification by lateral and enters hearth combustion.In this combustion system, the gas-powder ratio of coal dust is 1: 8-1: 11.Adjust dispenser rotating speed and can adjust feeding coal, the valve between each storehouse is controlled material level storehouse in automatically, guarantee continuously, even, can control feed.
The invention has the beneficial effects as follows: can realize the specification requirement of boiler positive pressuring combustion, for pressure combustion in future boiler provides reliable fuel, supply with.By fineness qualified coal dust process strength powder feed system and device, with higher concentration, send into hearth combustion, the breeze airflow of higher concentration enters the combustion chemistry reaction atmosphere that forms higher concentration after 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 boiler original flue gas, realize the normal operation of boiler devulcanizer, reach fume environment protection qualified discharge, alleviate environmental pollution and reduce denitrating flue gas cost.Adopt concentrated phase powder feeding, and be equipped with after rational burning adjustment, boiler smoke Nox content reduces 10%-30%, the fully high-speed burning of coal dust, the corresponding reduction of denitrating flue gas cost 5%-20%.There is obvious environmental benefit and economic benefit, can be widely used in the transformation of existing boiler, the useful reference while also can be used as newly constructed boiler fuel design.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, 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.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described; The strength powder feeding of boiler concentrated phase and combustion system, by Bunker (1), in 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 to be formed.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 to control rotating speed.Its operation principle of the present invention and flow process are: between Bunker (1) and middle roll-over (2), by-pass valve control (8) is opened, fuel enters middle roll-over (2) from Bunker (1), middle roll-over (2) is filled rear by-pass valve control (8) and is automatically closed, then between middle roll-over (2) and conveying storehouse (3), by-pass valve control (9) is opened, fuel in middle roll-over (2) enters carries storehouse (3), while carrying storehouse (3) to reach certain material level, start dispenser (4), fuel enters distributor (5) through dispenser (4), compressed air is delivered to burner (7) by fuel gasification by lateral and enters hearth combustion.In this combustion system, the gas-powder ratio of coal dust is 1: 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 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 switch board (13), is automatically controlled.
The present invention 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 supplements, and native system can obviously reduce boiler Nox content, improve boiler combustion efficiency, reduce Denitration in Boiler operating cost.The present invention has 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 boiler few-oil ignition with torch oil gun combination, thus the fuel consume while saving boiler startup.

Claims (5)

1. a boiler concentrated phase strength powder feeding and combustion system, 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 to control rotating speed.
2. boiler concentrated phase strength powder feeding according to claim 1 and combustion system, it is characterized in that between the said Bunker of this combustion system (1) and middle roll-over (2), by-pass valve control (8) is opened, fuel enters middle roll-over (2) from Bunker (1), middle roll-over (2) is filled rear by-pass valve control (8) and is automatically closed, then between middle roll-over (2) and conveying storehouse (3), by-pass valve control (9) is opened, fuel in middle roll-over (2) enters carries storehouse (3), while carrying storehouse (3) to reach certain material level, start dispenser (4), fuel enters distributor (5) through dispenser (4), compressed air is delivered to burner (7) by fuel gasification by lateral and enters hearth combustion.
3. boiler concentrated phase strength powder feeding according to claim 1 and combustion system, the gas-powder ratio that it is characterized in that coal dust in this combustion system is 1: 8-1: 11.
4. boiler concentrated phase strength powder feeding according to claim 1 and combustion system, it is characterized in that adjusting 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).
5. boiler concentrated phase strength powder feeding according to claim 1 and combustion system, it is characterized in that all Access Control cabinets (13) of 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), by switch board (13), automatically controlled.
CN201210349531.2A 2012-09-06 2012-09-06 Dense-phase powder feeding and burning system for boiler Pending CN103672947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210349531.2A CN103672947A (en) 2012-09-06 2012-09-06 Dense-phase powder feeding and burning system for boiler

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Application Number Priority Date Filing Date Title
CN201210349531.2A CN103672947A (en) 2012-09-06 2012-09-06 Dense-phase powder feeding and burning system for boiler

Publications (1)

Publication Number Publication Date
CN103672947A true CN103672947A (en) 2014-03-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994452A (en) * 2014-05-30 2014-08-20 聊城华诚环保设备科技有限公司 Coal additive conveying and spraying unit

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2783151Y (en) * 2005-04-13 2006-05-24 温平 Fuel conveying contvoller
CN1903756A (en) * 2006-07-29 2007-01-31 威海蓝星玻璃股份有限公司 Method of solid fuel fusion cast glass and fuel supply system
CN101618938A (en) * 2009-08-05 2010-01-06 陆平 Method and device for melting glass by solid fuels conveyed by dilute phase pneumatic
CN201416899Y (en) * 2009-03-13 2010-03-03 郭翠苹 Solid fuel feeder for nonmetallic industrial furnace
CN201448862U (en) * 2009-07-31 2010-05-05 郭翠苹 Fuel feed system of ceramic kiln adopting dilute phase pneumatic conveying
CN102607050A (en) * 2012-03-28 2012-07-25 上海中科高等研究院 Intermediate warehousing type air powder system
CN202915390U (en) * 2012-09-06 2013-05-01 中国石油化工股份有限公司 Dense phase pneumatic powder feeding system device of boiler

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2783151Y (en) * 2005-04-13 2006-05-24 温平 Fuel conveying contvoller
CN1903756A (en) * 2006-07-29 2007-01-31 威海蓝星玻璃股份有限公司 Method of solid fuel fusion cast glass and fuel supply system
CN201416899Y (en) * 2009-03-13 2010-03-03 郭翠苹 Solid fuel feeder for nonmetallic industrial furnace
CN201448862U (en) * 2009-07-31 2010-05-05 郭翠苹 Fuel feed system of ceramic kiln adopting dilute phase pneumatic conveying
CN101618938A (en) * 2009-08-05 2010-01-06 陆平 Method and device for melting glass by solid fuels conveyed by dilute phase pneumatic
CN102607050A (en) * 2012-03-28 2012-07-25 上海中科高等研究院 Intermediate warehousing type air powder system
CN202915390U (en) * 2012-09-06 2013-05-01 中国石油化工股份有限公司 Dense phase pneumatic powder feeding system device of boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994452A (en) * 2014-05-30 2014-08-20 聊城华诚环保设备科技有限公司 Coal additive conveying and spraying unit

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Application publication date: 20140326