CN2449063Y

CN2449063Y - Hydrophilious slurry burner

Info

Publication number: CN2449063Y
Application number: CN 00256004
Authority: CN
Inventors: 王占林
Original assignee: Qingdao Haizong Industry Co ltd
Current assignee: Qingdao Haizhong Environmental Protection Boiler Co., Ltd.
Priority date: 2000-10-16
Filing date: 2000-10-16
Publication date: 2001-09-19
Anticipated expiration: 2010-10-16

Abstract

The utility model provides a water-coal slurry burner. The utility model is characterized in that the structure of an atomization device can be formed by the way that a slurry core tube is arranged in an inner cavity of an outer shell, the slurry core tube is connected with a distributor, and a first slurry passage arranged in the slurry core tube is communicated with an accelerating passage and an internal mixing passage of the distributor. At least more than two first impact holes and second impact holes are drilled on the body of the distributor, and the middle part of an inner cavity of a nozzle is provided with a cylindrical impinger. Because of a mixed atomization process of second air, the atomization effect of ejective coal water slurry is good, the mixture of the coal water slurry and air is sufficient, thus, the goal of sufficient combustion can be achieved, combustion rate can reach about 97%, and burning stability is good.

Description

Water coal slurry burner

The utility model belongs to cool water mixture burning equipment, is the improvement to existing water coal slurry burner structure.

High-concentration coal-water slurry is that a kind of coal dust accounts for 60～70%, moisture content accounts for 30～40%, and adds a small amount of additive, the liquid fuel that processes from strand.This liquid fuel forms the vaporific of high velocity jet by water coal slurry burner, to reach clean-burning purpose.It is widely used on various kilns, Industrial Boiler and the station boiler.Though and existing water coal slurry burner is of a great variety, function is different, but still exist some defectives unavoidably: 1, the water-coal-slurry atomizing effect is poor, and scattering area is little, and it is fully stable inadequately to burn, and combustion rate is low.2, the atomizer inner wall abrasion of burner is very fast, and service life is short, changes frequently, and wearing and tearing cause atomizing effect poor usually again.3, spray orifice and runner are narrower, easily stop up.4, air distribution is bad, and combustion rate is low.People are expecting that the technical scheme that addresses the above problem produces as early as possible.

The utility model provides a kind of water coal slurry burner, and it can realize the purpose that atomizing effect is good, combustion rate is high, atomizer is wear-resistant and air distribution is good.

In order to achieve the above object, the technical solution of the utility model is: it comprises air register, atomizer, it is characterized in that the formation of atomizer is: what the shell front end connected is nozzle; The rear end connects airduct, be provided with a slurry core pipe in the inner chamber of shell, above-mentioned slurry core pipe connects a distributor, the passage of once starching in the slurry core pipe is communicated with the accelerated passage and the interior hybrid channel of distributor, the caliber of above-mentioned accelerated passage is less than once starching passage and interior hybrid channel, the caliber of interior hybrid channel is less than once starching passage, be drilled with on the distributor body at least two with on impingement holes once, an above-mentioned impingement holes is communicated with the wind chamber with interior hybrid channel, on distributor body, also be drilled with at least two above secondary impact holes, above-mentioned secondary impact hole is communicated with the wind chamber with the front end face of interior hybrid channel, be provided with cylindric ram at nozzle inner chamber middle part.

In accelerated passage and interior hybrid channel, be provided with lining.

The rear end face of hybrid channel in the outlet of a described impingement holes is located at.

Once starch caliber=3.5～4.5 of the caliber/accelerated passage of passage: 1; The caliber of the caliber of accelerated passage/interior hybrid channel=1: 2.5～3.2.

The quantity of the spray orifice of nozzle is 3～6, and its internal diameter is 2.3～8mm.

The secondary impact hole is a shoulder hole, and be aperture front large hole after.

The material of described lining is pottery or powder metallurgy.

The impeller in an air channel of described air register adopts fixedly impeller; The impeller of secondary air duct adopts movable impeller.

The utility model compared with prior art has the following advantages and good effect: 1, during work, water-coal-slurry is from slurry core pipe enters once slurry passage the distributor, enter the thinner accelerated passage in aperture then, in water-coal-slurry enters behind the hybrid channel, compressed air sprays in the chamber of interior hybrid channel from an impingement holes, water-coal-slurry is mixed with air, when water-coal-slurry enters in the nozzle chamber collision on ram the back to around scatter, under the compressed-air actuated effect of secondary impact hole ejection, outwards spray from spray orifice, because the atomization process that has auxiliary air to mix, the water-coal-slurry atomizing effect of ejection is good, and water-coal-slurry is mixed fully with air, thereby has reached the purpose of sufficient combustion, combustion rate can reach about 97%, and the good stability of burning.2, in distributor, be provided with anti-wearing liner (powder metallurgy or pottery), improved wearability greatly, improved service life.3, air register adopts movable impeller and the fixing version that matches of impeller, makes primary and secondary air can realize preferable air distribution state and swirl strength, to reach the purpose of abundant after-flame.4, injection diameter expansion (atomizer more of the same type aperture is big 2～5 times), and quantity increases, and has overcome susceptible to plugging defective.

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is the profile of the utility model atomizer;

Fig. 2 is the structure chart that this reality wins novel air register.

1, airduct; 2, wind nozzle; 3, accelerated passage; 4, interior hybrid channel; 5, T-slot; 6, outer hybrid chamber; 7, ram; 8, spray orifice; 9, nozzle; 10, secondary impact hole; 11, lining; 12, shell; 13, impingement holes; 14, distributor; 15, once starch passage; 16, slurry core pipe; 17, atomizer; 18, wind chamber; 19, air register; 20, core pipe; 21 air channels; 22, handwheel; 23, secondary air duct; 24, movable impeller; 25, fixing impeller.

Referring to Fig. 1, for make water-coal-slurry fully atomizing and water-coal-slurry fully mix with air, thereby original atomizer 17 is improved, its improved structure is: what shell 12 front ends connected is nozzle 9; The rear end connects airduct 1, be provided with a slurry core pipe 16 in the inner chamber of shell 12, this slurry core pipe 16 connects a distributor 14, the passage 15 of once starching in the slurry core pipe 16 is communicated with the accelerated passage 3 and the interior hybrid channel 4 of distributor 14, the caliber of above-mentioned accelerated passage 3 is less than once starching passage 15 and interior hybrid channel 4, and the caliber of interior hybrid channel 4 is less than once starching passage 15.In the present embodiment, the caliber of once starching passage 15 is 4: 1 with the ratio of the caliber of accelerated passage 3; The caliber of accelerated passage 3 is 1: 3 with the ratio of the caliber of interior hybrid channel 4.Be drilled with two impingement holes 13 on distributor 14 bodies, an above-mentioned impingement holes 13 is communicated with wind chamber 18 with interior hybrid channel 4, the rear end face of hybrid channel 4 in the outlet of an impingement holes 13 is located at, and an impingement holes 13 is oblique holes.The effect of an impingement holes 13 is to carry out the air mixing first time, to reach the purpose of abundant atomizing.On distributor 14 bodies, also be drilled with at least two above secondary impact holes 10, secondary impact hole 10 is shoulder holes, and be aperture at front large hole in back (front and back are to be as the criterion with flow direction), above-mentioned secondary impact hole 10 is communicated with the front end face of wind chamber 18 with interior hybrid channel 4, and the effect in secondary impact hole 10 is to carry out secondary-atomizing.Be provided with cylindric ram 7 at nozzle 9 inner chambers middle parts, when water-coal-slurry after 4 ejections of interior hybrid channel, just impinge upon on the ram 7 water-coal-slurry scattered towards periphery, to reach the purpose of abundant atomizing.Be provided with lining 11 in accelerated passage 3 and interior hybrid channel 4, the material of lining 11 is potteries, and ceramic chamber lining 110 minutes is wear-resisting, thereby the service life of having improved atomizer 17.The quantity of the spray orifice 8 of nozzle 9 is 4, and its internal diameter is 2.5mm, and the quantity of spray orifice 8 is many and diameter is big, thereby has overcome susceptible to plugging phenomenon generation.

Referring to Fig. 2, the impeller in an air channel 21 of air register 19 adopts fixedly impeller 25; The impeller of secondary air duct 23 adopts movable impeller 24, makes primary and secondary air can realize preferable air distribution state and swirl strength, further makes fuel in the flame reach the purpose of after-flame.

Claims

1, a kind of water coal slurry burner, it comprises air register (19), atomizer (17), it is characterized in that the formation of atomizer (17) is: what shell (12) front end connected is nozzle (9); The rear end connects airduct (1), be provided with a slurry core pipe (16) in the inner chamber of shell (12), above-mentioned slurry core pipe (16) connects a distributor (14), once slurry passage (15) in the slurry core pipe (16) is communicated with accelerated passage (3) and interior hybrid channel (4) of distributor (14), the caliber of above-mentioned accelerated passage (3) is less than once starching passage (15) and interior hybrid channel (4), the caliber of interior hybrid channel (4) is less than once starching passage (15), on distributor (14) body, be drilled with at least two with last impingement holes (13), an above-mentioned impingement holes (13) is communicated with wind chamber (18) with interior hybrid channel (4), on distributor (14) body, also be drilled with at least two above secondary impact holes (10), above-mentioned secondary impact hole (10) is communicated with wind chamber (18) front end face with interior hybrid channel (4), is provided with cylindric ram (7) at nozzle (9) inner chamber middle part.

2, water coal slurry burner according to claim 1 is characterized in that: be provided with lining (11) in accelerated passage (3) and interior hybrid channel (4).

3, water coal slurry burner according to claim 1 is characterized in that: the outlet of a described impingement holes (13) is located at the rear end face of interior hybrid channel (4).

4, water coal slurry burner according to claim 1 is characterized in that: caliber=3.5～4.5 of once starching the caliber/accelerated passage (3) of passage (15): 1; Caliber=1: 2.5～3.2 of the caliber of accelerated passage (3)/interior hybrid channel (4).

5, water coal slurry burner according to claim 1 is characterized in that: the quantity of the spray orifice (8) of nozzle (9) is 3～6, and its internal diameter is 2.3～8mm.

6, water coal slurry burner according to claim 1 is characterized in that: secondary impact hole (10) are shoulder holes, and be aperture front large hole after.

7, water coal slurry burner according to claim 2 is characterized in that: the material of described lining (11) is pottery or powder metallurgy.

8, water coal slurry burner according to claim 1 is characterized in that: the impeller in an air channel (21) of described air register (19) adopts fixedly impeller (25); The impeller of secondary air duct (23) adopts movable impeller (24).