CN203687026U - Tiny-oil ignition system suitable for W-firing boiler - Google Patents

Tiny-oil ignition system suitable for W-firing boiler Download PDF

Info

Publication number
CN203687026U
CN203687026U CN201420033001.1U CN201420033001U CN203687026U CN 203687026 U CN203687026 U CN 203687026U CN 201420033001 U CN201420033001 U CN 201420033001U CN 203687026 U CN203687026 U CN 203687026U
Authority
CN
China
Prior art keywords
coal
powder
oil ignition
coal powder
oil
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.)
Active
Application number
CN201420033001.1U
Other languages
Chinese (zh)
Inventor
谢辉
王进卿
池作和
游国平
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.)
HANGZHOU ZJU TIANYUAN TECHNOLOGY Co Ltd
Original Assignee
HANGZHOU ZJU TIANYUAN TECHNOLOGY Co Ltd
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 HANGZHOU ZJU TIANYUAN TECHNOLOGY Co Ltd filed Critical HANGZHOU ZJU TIANYUAN TECHNOLOGY Co Ltd
Priority to CN201420033001.1U priority Critical patent/CN203687026U/en
Application granted granted Critical
Publication of CN203687026U publication Critical patent/CN203687026U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a tiny-oil ignition system suitable for a W-firing boiler. The tiny-oil ignition system comprises a coal powder preparing system, a coal powder storage system, a coal powder conveying system, a boiler body, a tiny-oil ignition coal powder burner, an original burner and a coal powder distributor. The coal powder preparing system, the coal powder storage system, the coal powder conveying system, the coal powder distributor, the tiny-oil ignition coal powder burner and the boiler body are sequentially connected. The tiny-oil ignition coal powder burner is installed on a front arch and a rear arch of the boiler body. The coal powder conveying system comprises a middle powder cabin, an electric valve, a powder conveying packing auger, a discharging pipe, a Roots blower, an air-powder mixer, a powder conveying packing auger motor and a primary air blast pipe. According to the tiny-oil ignition system, an existing powder preparing system in a power plant is not changed, the safety and the reliability of the existing powder preparing system are guaranteed, and the tiny-oil ignition system has the advantages of being high in oil saving ratio, simple, low in device investment and operation cost, capable of being widely applied to the process of ignition of the W-firing boiler and low load steady burning and the like and has certain market competitiveness.

Description

A kind of micro oil ignition system that is applicable to W type flame boiler
Technical field
The utility model relates to micro oil ignition system, relates in particular to a kind of micro oil ignition system of the W of being applicable to type flame boiler.
Background technology
Coal resources in China total amount is abundant, and according to statistics, whole nation prediction coal reserves is 2.6 trillion tons, and wherein anthracite accounts for the whole nation and possesses 12% of coal reserves, and widely distributed, and nearly more than 20 provinces, the whole nation all have anthracite resource to some extent.Anthracite has the feature that degree of coalification is high, volatile matter content is low and content of ashes is high conventionally, and high degree of coalification also makes its lithofacies structure closely stablize, porosity is little, reactive low, thereby use in process actual, often there is the problem of the difficulty of catching fire, smooth combustion difficulty and after-flame difficulty in anthracite, need ignition temperature and after-flame temperature is higher, the tail-off time is long.Before the nineties in 20th century, domestic power boiler burning anthracite is mainly selected DC burner Terms of Corner Tangential Combustion, and strengthen anthracite ignition how and surely done many-sided research aspect combustion, as precombustion chamber, adjustable pulverized coal concentration burner, burner using coal powder with fire stabilizer, bluff body burner, sandwich-wind combustor, high speed difference same direction jet burner, shutter shade burner, PAX burner, petal burner and lay wall with refractory lining, refracto etc.Being applied in of these combustion systems or novel burner improved and in anthracite combustion performance, all obtained certain progress, but in boiler actual moving process, still has the problems such as boiler flameout, fly ash combustible material are high, Boiler Furnace slagging, heat-transfer surface booster.
For the catch fire colm of steady combustion of this class difficulty of anthracite, English, Mei Deng state have developed a kind of W shape flame pulverized-coal fired boiler of the low volatile coal that is suitable for specially burning, and China is also corresponding to start from the boiler of external this type of introduction in late 1980s.From design concept, the interior unique down-ejection type combustion system of W type flame boiler is conducive to extend pulverized coal particle and obtains better burn-off rate at residing time in furnace, combustion zone surrounding lays a large amount of wall with refractory lining, refracto and arch is lower forms the ignition and steady combustion that high temperature gases recirculating contributes to anthracite breeze airflow, and the classification of stove inner second air is sent into and is also conducive to reduce NO xdischarge.Because W type flame boiler has these distinctive structures and burning organizational form, thereby be considered to use the more satisfactory type of furnace of this class low volatile coal of anthracite.According to incompletely statistics, China has put into operation and has reached 130 left and right in the W type flame boiler quantity of building at present, accounts for the more than 80% of world W type flame boiler recoverable amount, and total installation of generating capacity exceedes 41000MW.
The coal using due to W type flame boiler is anthracite substantially, and anthracitic ignition and steady combustion poor performance makes the debugging of W type boiler new-built unit, boiler unit starting and low-load combustion-stabilizing fuel consumption generally bigger than normal.According to related data statistics, a cold conditions igniting of the W type flame boiler of a 600MW unit needs to consume 200-300 ton fuel oil.Therefore how to reduce startup and the low-load combustion-stabilizing fuel consumption of W type flame boiler, become the effective way that improves economy of power plant benefit.Domestic many adopt the power plant of W type burner flame to how reducing fuel consume grope and inquire into, as reduced boiler cold-state start-up time, use instead fire coal that volatile matter is high as starting with coal, reduce coal pulverizer start and stop and help the aspect such as fuel oil and employing tiny-oil ignition technology.
The problems such as these technology ubiquity rates of economizing gasoline are not high, complicated operation, pulverized coal preparation system fault and stove chamber fire-extinguishing, such as the startup coal that adopts coal that the volatile matter such as bituminous coal is higher as boiler, owing to pulverized coal preparation system not being improved, still adopt and grind anthracitic pulverized coal preparation system, cause this system to be moved under off-design operating mode, easily cause pulverized coal preparation system fault, when serious, more can cause system blast.In addition, some power plant have adopted conventional tiny-oil ignition technology, but being generally applied to, this technology lights the coal that volatile matter is higher, light and be directly used in the anthracite that volatile matter is lower, can exist anthracite to be difficult to catch fire rapidly and the shortcoming of smooth combustion, thus cause boiler flameout or the gauging rifle that still needs to have high input for ignition smooth combustion.
For above problem, the utility model, on the basis of original tiny-oil ignition technology, has been researched and developed the tiny-oil ignition technology that is applicable to W type flame boiler.This technology has proposed employing bituminous coal as oily coal of generation, with the micro-higher bituminous coal of oil drop combustion volatile matter, thus the reliability of raising tiny-oil ignition technology, rate of economizing gasoline can reach more than 90%.The basis of this technology is to adopt outsourcing pulverized bituminous coal or on-the-spot self-control pulverized bituminous coal as igniting coal, original anthracite pulverized coal preparation system is not changed, and has guaranteed the safety and reliability of pulverized coal preparation system.
Summary of the invention
For the problem of above existence, the purpose of this utility model is to provide a kind of and collects pulverized coal preparation, storage, conveying, burns in the micro oil ignition system of the integrated W of being applicable to type flame boiler.
For achieving the above object, the technical solution adopted in the utility model is:
The micro oil ignition system that is applicable to W type flame boiler comprises coal dust preparation system, coal dust stocking system, coal powder conveying system, boiler body, micro-oil ignition coal powder combusting device, former burner, pulverized coal distributor, coal dust preparation system comprises pressure fan and coal pulverizer, coal dust stocking system comprises bag filter and Pulverized Coal Bin, powder storehouse in the middle of coal powder conveying system comprises, electrically operated valve, defeated powder auger, material blanking tube, roots blower, air and powder mixer, defeated powder auger motor, a wind ajutage, pressure fan, coal pulverizer, bag filter, Pulverized Coal Bin, coal powder conveying system, pulverized coal distributor, micro-oil ignition coal powder combusting device, boiler body is connected in turn, micro-oil ignition coal powder combusting device, former burner is arranged on the front and back arch of boiler body,
Described middle powder storehouse and defeated powder auger, by pipeline communication, are provided with electrically operated valve on pipeline; One end of defeated powder auger is connected with defeated powder auger motor, the discharging opening of defeated powder auger is communicated with the middle part of air and powder mixer by material blanking tube, one end of air and powder mixer is connected with roots blower by air supply duct, and the other end of air and powder mixer is connected with a wind ajutage.
Described air and powder mixer is venturi tubulose.
The primary air nozzle of described micro-oil ignition coal powder combusting device is connected with a wind ajutage of coal powder conveying system by pulverized coal distributor; The oil gun import of described micro-oil ignition coal powder combusting device is connected with an airduct with the oil pipe line of power plant respectively with combustion air import.
Compared with prior art, the beneficial effect the utlity model has is:
1. for the large problem of W type flame boiler starting ignition fuel oil fuel consumption, the utility model adopts tiny-oil ignition technology, fires a large amount of coal dusts with micro-oil drop, thus realization " replace oil with coal ", igniting rate of economizing gasoline can reach more than 90%, and has low-load combustion-stabilizing function;
2. with respect to prior art, the utility model is provided with separately pulverized coal preparation, storage and induction system, is independent of the original pulverized coal preparation system of power plant, original pulverized coal preparation system is not changed, thereby has been guaranteed the safety and reliability of original pulverized coal preparation system.
3. because most prior aries grind startup coal on original pulverized coal preparation system, therefore can only grind the coal of low-volatile due to the limitation of original pulverized coal preparation system, thereby cause the rate of economizing gasoline of whole system not high.The utility model is owing to having adopted independently pulverized coal preparation, storage and induction system, thereby the bituminous coal that can grind high-volatile is as igniting coal, thereby can significantly improve the rate of economizing gasoline of whole system.
4. the utility model system is simple, and whole process can realize automatic control, and small investment, and operating cost is low, has certain market competitiveness.
Brief description of the drawings
Fig. 1 is the micro oil ignition system structural representation that is applicable to W type flame boiler;
Fig. 2 is the structural representation of the utility model coal powder conveying system;
In figure, coal dust preparation system 1, coal dust stocking system 2, coal powder conveying system 3, boiler body 4, micro-oil ignition coal powder combusting device 5, former burner 6, pressure fan 7, coal pulverizer 8, bag filter 9, Pulverized Coal Bin 10, pulverized coal distributor 11, middle powder storehouse 31, electrically operated valve 32, defeated powder auger 33, material blanking tube 34, roots blower 35, air and powder mixer 36, defeated powder auger motor 37, a wind ajutage 38.
Detailed description of the invention
Below in conjunction with accompanying drawing and example, the utility model is further described.
As depicted in figs. 1 and 2, the micro oil ignition system that is applicable to W type flame boiler comprises coal dust preparation system 1, coal dust stocking system 2, coal powder conveying system 3, boiler body 4, micro-oil ignition coal powder combusting device 5, former burner 6, pulverized coal distributor 11, coal dust preparation system 1 comprises pressure fan 7 and coal pulverizer 8, coal dust stocking system 2 comprises bag filter 9 and Pulverized Coal Bin 10, powder storehouse 31 in the middle of coal powder conveying system 3 comprises, electrically operated valve 32, defeated powder auger 33, material blanking tube 34, roots blower 35, air and powder mixer 36, defeated powder auger motor 37, a wind ajutage 38, pressure fan 7, coal pulverizer 8, bag filter 9, Pulverized Coal Bin 10, coal powder conveying system 3, pulverized coal distributor 11, micro-oil ignition coal powder combusting device 5, boiler body 4 is connected in turn, micro-oil ignition coal powder combusting device 5, former burner 6 is arranged on the front and back arch of boiler body 4, pipeline communication is passed through with defeated powder auger 33 in described middle powder storehouse 31, electrically operated valve 32 is installed on pipeline, one end of defeated powder auger 33 is connected with defeated powder auger motor 37, the discharging opening of defeated powder auger 33 is communicated with the middle part of air and powder mixer 36 by material blanking tube 34, one end of air and powder mixer 36 is connected with roots blower 35 by air supply duct, and the other end of air and powder mixer 36 is connected with a wind ajutage 38.The utility model is not transformed W type boiler original burner 6, but in part oil burner position, micro-oil ignition coal powder combusting device is installed.Coal dust prepared by the utility model coal dust preparation system 1 enters coal dust stocking system 2 and stores, after send into micro-oil ignition coal powder combusting device 5 through coal powder conveying system 3 and burn.
Micro-oil ignition coal powder combusting device 5 of the present utility model is arranged on the oil burner position on boiler body 4 front and back arches, coal pulverizer of the present utility model has that volume is little, efficiency is high, easy-operating advantage, the coal cinder that enters factory can be worn into thinner particle and send into coal dust stocking system.Dust-precipitator of the present utility model adopts the bag filter that is widely used in cement industry coal dust preparation system, and this dust-precipitator has the advantages such as separative efficiency is high, deashing control is flexible, resistance is little, safe and reliable.Pulverized Coal Bin 10 adopts now the coal dust powder-storage bin technology of maturation, and this technology has adopted explosion-proof valve, fluidized wind, N 2the measures such as inert gas shielding, temperature and CO monitoring, can ensure the safe and reliable operation of Pulverized Coal Bin.
Described air and powder mixer 36 is venturi tubulose.
The primary air nozzle of described micro-oil ignition coal powder combusting device 5 is connected with a wind ajutage 38 of coal powder conveying system 3 by pulverized coal distributor 11; The oil gun import of described micro-oil ignition coal powder combusting device 5 is connected with an airduct with the oil pipe line of power plant respectively with combustion air import.
Air and powder mixer of the present utility model has adopted venturi-shaped, can ensure uniform feeding, and can not stop up.Powder feeding blower fan of the present utility model adopts high pressure roots blower fan, and it can meet the remote conveying of coal dust, thereby can provide greater flexibility for the position of Pulverized Coal Bin.
Micro-oil ignition coal powder combusting device 5 of the present utility model adopts the described burner of " meager coal cold state ignition under tiny oil and steady burning burner in ultra low load " (patent No.: ZL200510049732.0), and the primary air nozzle of this burner is connected with a wind ajutage 37 of coal powder conveying system 3 by pulverized coal distributor 11.The oil gun import of micro-oil ignition coal powder combusting device is connected with an airduct with the oil pipe line of power plant respectively with combustion air import.This micro-oil ignition coal powder combusting device is 3 grades of amplifications modes of igniting, and after coal dust is concentrated by streamlined light-dark separation device, dense phase pulverized coal is by 1 grade of combustion chamber, and coal dust is subject to the IMPULSIVE HEATING of high temperature oil flame, and volatile matter is separated out fast, and is ignited rapidly.The 1st grade of coal dust igniting ignite the 2nd grade and 3rd level coal dust, reach under black furnace state, by the object of micro-oil drop burning coal powder again.This micro-oil ignition coal powder combusting device has also adopted unique air film cooling air design, and this cooling air draws from original secondary air box, without increasing new pipeline.Air film cooling air purging parallel with burner wall, can be evenly cooling to wall, minimum on the aerodynamic field impact of an airduct in addition, and have anti-wear effect concurrently.
The little oil ignition method that is applicable to the micro oil ignition system of W type flame boiler is: by belt conveyor, raw coal is delivered to coal pulverizer 8 from former coal yard and grind, coal dust after grinding is delivered to bag filter 9 by pressure fan 7, bag filter 9 will fall into Pulverized Coal Bin 10 by drop pipe after pulverized-coal filtering, weary gas enters atmosphere by chimney, before coal dust drops into burning, need, by enough coal dust storage enough coal dusts, in the time that the enough boiler ignition starts of Pulverized Coal Bin coal dust are used coal, stop coal-grinding.Can be according to an ignition trigger coal consumption, multiple Pulverized Coal Bin are set, in the time that coal dust drops into burning, open electrically operated valve 32, start defeated powder auger motor 37 simultaneously, coal dust continuous rotation in middle powder storehouse 31 is delivered to the end of defeated powder auger 33, and fall into material blanking tube 34, coal dust is because deadweight falls to air and powder mixer 36, the high-pressure blast that roots blower 35 produces mixes at air and powder mixer 36 places with coal dust, wind powder air-flow after mixing enters pulverized coal distributor 11 by a wind ajutage 38, breeze airflow is divided equally the rear corresponding micro-oil ignition coal powder combusting device 5 that passes into respectively by pulverized coal distributor 11, the breeze airflow that enters micro-oil ignition coal powder combusting device 5 is subject to the IMPULSIVE HEATING of high temperature oil flame, fugitive constituent is separated out fast, and ignited rapidly, the 1st grade of coal dust igniting ignite again the 2nd grade and 3rd level coal dust, thereby reach under black furnace state, by the object of micro-oil drop burning coal powder.

Claims (3)

1. be applicable to a micro oil ignition system for W type flame boiler, it is characterized in that comprising coal dust preparation system (1), coal dust stocking system (2), coal powder conveying system (3), boiler body (4), micro-oil ignition coal powder combusting device (5), former burner (6), pulverized coal distributor (11), coal dust preparation system (1) comprises pressure fan (7) and coal pulverizer (8), coal dust stocking system (2) comprises bag filter (9) and Pulverized Coal Bin (10), powder storehouse (31) in the middle of coal powder conveying system (3) comprises, electrically operated valve (32), defeated powder auger (33), material blanking tube (34), roots blower (35), air and powder mixer (36), defeated powder auger motor (37), a wind ajutage (38), pressure fan (7), coal pulverizer (8), bag filter (9), Pulverized Coal Bin (10), coal powder conveying system (3), pulverized coal distributor (11), micro-oil ignition coal powder combusting device (5), boiler body (4) is connected in turn, micro-oil ignition coal powder combusting device (5), former burner (6) is arranged on the front and back arch of boiler body (4), and described middle powder storehouse (31) by pipeline communication, is provided with electrically operated valve (32) with defeated powder auger (33) on pipeline, one end of defeated powder auger (33) is connected with defeated powder auger motor (37), the discharging opening of defeated powder auger (33) is communicated with the middle part of air and powder mixer (36) by material blanking tube (34), one end of air and powder mixer (36) is connected with roots blower (35) by air supply duct, and the other end of air and powder mixer (36) is connected with a wind ajutage (38).
2. a kind of micro oil ignition system that is applicable to W type flame boiler according to claim 1, is characterized in that described air and powder mixer (36) is venturi tubulose.
3. a kind of micro oil ignition system that is applicable to W type flame boiler according to claim 1, is characterized in that: the primary air nozzle of described micro-oil ignition coal powder combusting device (5) is connected with a wind ajutage (38) of coal powder conveying system (3) by pulverized coal distributor (11); The oil gun import of described micro-oil ignition coal powder combusting device (5) is connected with an airduct with the oil pipe line of power plant respectively with combustion air import.
CN201420033001.1U 2014-01-20 2014-01-20 Tiny-oil ignition system suitable for W-firing boiler Active CN203687026U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420033001.1U CN203687026U (en) 2014-01-20 2014-01-20 Tiny-oil ignition system suitable for W-firing boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420033001.1U CN203687026U (en) 2014-01-20 2014-01-20 Tiny-oil ignition system suitable for W-firing boiler

Publications (1)

Publication Number Publication Date
CN203687026U true CN203687026U (en) 2014-07-02

Family

ID=51008916

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420033001.1U Active CN203687026U (en) 2014-01-20 2014-01-20 Tiny-oil ignition system suitable for W-firing boiler

Country Status (1)

Country Link
CN (1) CN203687026U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103776028A (en) * 2014-01-20 2014-05-07 杭州浙大天元科技有限公司 Micro-oil ignition system and method applicable to W-type flame boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103776028A (en) * 2014-01-20 2014-05-07 杭州浙大天元科技有限公司 Micro-oil ignition system and method applicable to W-type flame boiler
CN103776028B (en) * 2014-01-20 2016-03-30 杭州浙大天元科技有限公司 Be applicable to micro oil ignition system and the method thereof of W type flame boiler

Similar Documents

Publication Publication Date Title
CN103776028B (en) Be applicable to micro oil ignition system and the method thereof of W type flame boiler
CN201680364U (en) Efficient low NOx pulverized coal burner for small and medium-sized industrial boilers
CN200968599Y (en) Low-polluting and self-prewarming powdered coal burner
CN107289444B (en) A kind of ultralow volatile matter carbon-based fuel and the low NOx of lignite mix the system and method for burning
CN101545632B (en) Micro oil pulverized coal burner
CN104819472A (en) Biomass solid waste and hazardous waste combustion gas production system
CN101424398B (en) Concentrated phase high-temperature oxygen-enriched oilless ignition combustion apparatus
CN201093529Y (en) Two-stage blunt body minim oil lighter
CN203082893U (en) Oxygen enrichment coal powder ignition stable combustion device of fire grate type garbage incinerator
CN202884901U (en) Boiler capable of realizing reignition of exhaust gas coal powder by using high-temperature flue gas and reducing NOx
CN203687026U (en) Tiny-oil ignition system suitable for W-firing boiler
CN207019075U (en) A kind of circulating fluid bed garbage furnace
CN201772451U (en) Coal dust burner with whirlwind auxiliary oil
CN201059598Y (en) Blunt body micro-oil-gasification ignition combusting device
CN101806452B (en) Micro oil content ignition coal powder burner capable of improving initial ignition heat
CN111947135B (en) Combustion method of W flame boiler capable of realizing self-stable combustion of ultralow-load concentrated pulverized coal airflow
CN205402704U (en) Two -stage adjustable steam plasma cyclone burner
CN107166383A (en) A kind of oxygen-enriched few-oil ignition system of boiler
CN201496958U (en) W-flame cyclone separation low-oil ignition burner
CN2842213Y (en) Oxygen-riched burning-aid small grease-gun direct-ignition burner device
CN104613466A (en) Double-volute swirl type pulverized coal burner provided with natural gas spray pipe and pre-burning chamber
CN205227306U (en) Deep or light hierarchical buggy low NOx burner
CN201954535U (en) Ignition air flue below circulating fluidized bed
CN104154532A (en) Center air ring concentrated type turbulent burner
CN207006132U (en) Low-volatile coal burner

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant