CN101672474B

CN101672474B - Horizontal bias internal-combustion igniter and main pulverized coal burner

Info

Publication number: CN101672474B
Application number: CN2009100322381A
Authority: CN
Inventors: 高克迎; 程怀志; 李永堂
Original assignee: XUZHOU COMBUSTION CONTROL RESEARCH INSTITUTE Co Ltd
Current assignee: XUZHOU KERONG ENVIRONMENTAL RESOURCES CO., LTD.
Priority date: 2009-06-09
Filing date: 2009-06-09
Publication date: 2012-01-25
Anticipated expiration: 2029-06-09
Also published as: CN101672474A

Abstract

The invention relates to a horizontal bias internal-combustion igniter and main pulverized coal burner which mainly comprises a primary air channel, a horizontal bias separating device, a high-intensity igniting gun, a pulverized coal supplemental firing chamber, a bias separating baffle and a perimeter air channel. The horizontal bias internal-combustion igniter and main pulverized coal burner inserts the high-intensity igniting gun in the pulverized coal supplemental firing chamber from the lean phase side of the pulverized coal burner, primary air-coal at the dense phase side is heated to ignition temperature of the pulverized coal, volatile components in the pulverized coal quick separate out and burn, and charcoal materials are simultaneously heated and burned to form high-temperature flames which are ejected into a furnace chamber so as to achieve the purposes of ignition and pulverized coal burning. In the progresses of furnace-starting ignition, furnace-shut-down combustion supporting and low-load stable burning, the burner greatly saves fuel, and the fuel saving rate can reach 80-100%. The horizontal bias internal-combustion igniter and main pulverized coal burner is applicable to boiler furnaces conducting the direct tangential firing of different kinds of coal, ensures no slag bonding and no ablation of the firing chamber, and has the advantages of reliable operation, low investment and operation cost and wide applicability.

Description

Horizontal bias internal-combustion igniter and main pulverized coal burner

Technical field

The present invention relates to a kind of internal-combustion igniter and main coal powder burner, specifically a kind of be used for the coal dust be fuel boiler open furnace igniting, blowing out is combustion-supporting and low-load combustion-stabilizing during replace fuel oil and the horizontal bias internal-combustion igniter and main pulverized coal burner of the burner combustion coal dust of can doublely deciding with the internal combustion type coal dust.

Background technology

General sparking mode was when generating plant pulverized coal boiler started at present: put oil burner with igniter earlier and (be commonly called as torch oil gun; Single Oil Gun be 0.8～5t/h) carry out boiler intensification, boost; When each relevant parameter of boiler reaches the requirement of throwing coal dust; Start pulverized coal preparation system and coal burner, realize load carrying.General when boiler load is reduced to 50% left and right sides, also must throw the steady combustion of oil and could guarantee that boiler normally moves.For example: the pulverized-coal fired boiler of a 300MW capacity, cold start once with the about 100t of oil, also need start oil gun and surely fire during underload, it is combustion-supporting also need to start oil gun during blowing out.Annual station boiler open furnace igniting, blowing out is combustion-supporting and low-load combustion-stabilizing need consume a large amount of fuel oil.

Summary of the invention

In order to solve the problem that pulverized-coal fired boiler in use runs into, the invention provides a kind of horizontal bias internal-combustion igniter and main pulverized coal burner, the coal dust of this horizontal bias internal-combustion coal burner is exerted oneself and can be reached 2～20t/h.General if with 4～8 of a boiler (because of the boiler capacity size different) coal burner is designed to this type horizontal bias internal-combustion igniter and main pulverized coal burner; Just can satisfy ignition of the boiler and steady combustion requirement, thereby reach that boiler opens furnace igniting, blowing out is combustion-supporting and use oil during low-load combustion-stabilizing less or need not this saving of oil and the purpose of alternative fuel oil.Rate of economizing gasoline can reach 80～100%, and when boiler normally moved, this burner also can be used as main pulverized coal burner and uses, and need not to switch wind powder method of supplying.

The present invention solves the technical scheme that its technological technical problem adopts: this horizontal bias internal-combustion igniter and main pulverized coal burner mainly is made up of air channel, horizontal bias separator, high intensity points firelock, coal dust overheavy firing chamber, deep or light phase demarcation strip and a surrounding air passage; This horizontal bias internal-combustion igniter and main pulverized coal burner has the coal burner of a tubular, and an end of this burner connects with an air channel and is connected; The set inside of burner has horizontal bias separator and deep or light demarcation strip mutually, and deep or light phase demarcation strip is parallel with this coal burner, and the burner inner room is separated into two parts, and the side of wherein waring oneself in front of a fire is as coal dust overheavy firing chamber; Wind powder air-flow gets in the combustor from air channel, separates into deep or light two phases through the horizontal bias separator, and through deep or light separation dividing plate be separated in two indoor, light at the burner hearth back-fire side, concentrated phase is indoor in the coal dust overheavy firing; The high intensity points firelock inserts coal dust overheavy firing chamber from the light phase side of coal burner, and the angle of the center line of this burning torch and coal dust overheavy firing chamber center line is 0～90 °, with the outlet of coal dust overheavy firing chamber apart from being 1～3 meter; Strengthen chamber interior with the high intensity points firelock at coal dust firing, the primary wind and powder of concentrated phase is heated to the ignition temperature of coal dust, make fugitive constituent in the coal dust separate out rapidly and burn, simultaneously the charcoal material is added thermal ignition and form the high temperature torch, spray and get into burner hearth; The outer setting of burner has the surrounding air passage.

The invention has the beneficial effects as follows: this horizontal bias internal-combustion igniter and main pulverized coal burner, open furnace igniting at pulverized-coal fired boiler, blowing out is combustion-supporting and the low-load combustion-stabilizing process in, save fuel oil greatly, its rate of economizing gasoline can reach 80～100%; It is adapted to use the boiler of the direct current tangential firing mode of various coals, guarantees not slagging scorification of combustion chamber, does not ablate, resistance to wears, reliable, and small investment, operating cost are low, have adaptability widely.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is described further.

Fig. 1 is the coal burner structure chart of band fractional combustion formula coal dust overheavy firing chamber;

Fig. 2 is the coal burner structure chart of air film wind formula coal dust overheavy firing chamber in the band;

Fig. 3 is the coal burner structure chart of the outer air film wind formula coal dust overheavy firing of band chamber.

1. air channels among the figure, 2. horizontal bias separator, 3. high intensity points firelock, 4. air film airduct, 5. coal dust overheavy firing chamber, 6. deep or light phase demarcation strip, 7. secondary combustion chamber, 8. air film air regulator mouth, 9. radiating fin, 10. surrounding air passage.

The specific embodiment

In the drawings, this horizontal bias internal-combustion igniter and main pulverized coal burner mainly is made up of air channel 1, horizontal bias separator 2, high intensity points firelock 3, coal dust overheavy firing chamber 5, deep or light phase demarcation strip 6 and a surrounding air path 10; This horizontal bias internal-combustion igniter and main pulverized coal burner has the coal burner of a tubular, and an end of this burner connects with an air channel 1 and is connected; The set inside of burner has horizontal bias separator 2 and deep or light 6 plates of separating mutually, and deep or light phase demarcation strip 6 laterally arranges with this coal burner, and the burner inner room is separated into two parts, and the side of wherein waring oneself in front of a fire is as coal dust overheavy firing chamber 5; Wind powder air-flow 1 gets in the combustor from air channel, separates into deep or light two phases through the horizontal bias separator, and through deep or light separation dividing plate 6 be separated in two indoor, light at the burner hearth back-fire side, concentrated phase is in coal dust overheavy firing indoor 5; High intensity points firelock 3 inserts coal dust overheavy firing chamber 5 from the light phase side of coal burner, and the angle of the center line of this burning torch 3 and coal dust overheavy firing chamber 5 center lines is 0～90 °, with the outlet of coal dust overheavy firing chamber 5 apart from being 1～3 meter; In 5 inside, coal dust overheavy firing chamber, the primary wind and powder of concentrated phase is heated to the ignition temperature of coal dust with high intensity points firelock 3, makes fugitive constituent in the coal dust separate out rapidly and burn, simultaneously the charcoal material is added thermal ignition and form the high temperature torch, spray and get into burner hearth; The outer setting of burner has the surrounding air path 10.High intensity points firelock 3 mainly contains three types: 1. oil burner, 2. gas burner, 3. plasma generator.

The structure of coal dust overheavy firing chamber 5 mainly contains three types: 1. the fractional combustion structure, 2. by the structure of interior air film wind protection, 3. by the structure of outer air film wind protection.

In Fig. 1; The fractional combustion structure is meant that coal burner inside is divided into 2～4 grades with the internal combustion tube, and each combustion chamber connects and connects, and utilizes the coal dust in the high intensity points firelock firing coal-dust overheavy firing chambers 5 (one-level combustion barrel) 3; Utilize the pulverized coal flame in the coal dust overheavy firing chamber 5 to remove to light the coal dust in the secondary combustion chamber 7 then; By that analogy, amplify step by step, until lighting whole coal dusts.

In Fig. 2; Structure by interior air film wind protection is meant that the through hole that on the wall of combustion chamber, leaves inclination is as air film air regulator mouth 8; And the side of waring oneself in front of a fire in the outside of combustion chamber is provided with air film airduct 4, introduces protection wind from the external world through this airduct, and it is inner to feed coal burners through air film air regulator mouth 8; Form the air film protective layer at the coal burner inwall, whole coal dusts mode that whole heat temperature raising is lighted in overheavy firing chamber 5 is taked in the coal dust overheavy firing chamber 5 of air film wind protection structure in the band.

In Fig. 3; Be meant by the structure of outer air film wind protection on the outer wall of combustion chamber, to be set with heat radiation fin 9, its side of waring oneself in front of a fire is provided with air film airduct 4, introduces protection wind from the external world through this airduct; This protection wind flows along burner outer wall is adherent; Coal burner is protected, and this protection wind gets into burner hearth at last, is with the coal dust overheavy firing chamber 4 of outer air film wind protection structure to take whole coal dusts mode that whole heat temperature raising is lighted in overheavy firing chamber 4.

Claims

1. a horizontal bias internal-combustion igniter and main pulverized coal burner comprises an air channel (1), horizontal bias separator (2), high intensity points firelock (3), coal dust overheavy firing chamber (5), deep or light phase demarcation strip (6) and surrounding air passage (10); This horizontal bias internal-combustion igniter and main pulverized coal burner is the coal burner of a tubular; One end of coal burner connects with an air channel (1) and is connected; It is characterized in that: the set inside of coal burner has horizontal bias separator (2) and deep or light demarcation strip mutually (6); Deep or light phase demarcation strip (6) laterally arranges with this coal burner, and the burner inner room is separated into two parts, and the side of wherein waring oneself in front of a fire is as coal dust overheavy firing chamber (5); Wind powder air-flow separates into deep or light two phases through the horizontal bias separator in getting into combustor from an air channel (1), and through deep or light phase demarcation strip (6) be separated in two indoor, light at the burner hearth back-fire side, concentrated phase is in coal dust overheavy firing chamber (5); High intensity points firelock (3) inserts coal dust overheavy firing chamber (5) from the light phase side of coal burner, and the angle of the center line of this burning torch (3) and coal dust overheavy firing chamber (5) center line is 0～90 °, with the outlet of coal dust overheavy firing chamber (5) apart from being 1～3 meter; In inside, coal dust overheavy firing chamber (5), the primary wind and powder of concentrated phase is heated to the ignition temperature of coal dust with high intensity points firelock (3), makes fugitive constituent in the coal dust separate out rapidly and burn, simultaneously the charcoal material is added thermal ignition and form the high temperature torch, spray and get into burner hearth; The outer setting of burner has surrounding air passage (10); On the outer wall of combustion chamber, be set with heat radiation fin (9), its side of waring oneself in front of a fire is provided with air film airduct (4), introduces protection wind from the external world through the air film airduct; This protection wind flows along burner outer wall is adherent; Coal burner is protected, and this protection wind gets into burner hearth at last, and whole coal dusts mode that whole heat temperature raising is lighted in coal dust overheavy firing chamber (5) is taked in coal dust overheavy firing chamber (5).

2. horizontal bias internal-combustion igniter and main pulverized coal burner according to claim 1 is characterized in that: high intensity points firelock (3) comprises three types: 1. oil burner, 2. gas burner, 3. plasma generator.