CN1058639A

CN1058639A - Slurry burner

Info

Publication number: CN1058639A
Application number: CN91105324A
Authority: CN
Inventors: 松冈邵; 平古场秀臣; 楝久省三
Original assignee: Ube Industries Ltd
Current assignee: Ube Corp
Priority date: 1990-08-03
Filing date: 1991-08-03
Publication date: 1992-02-12
Anticipated expiration: 2006-08-03
Also published as: CN1020353C; CA2046780C; JPH0792215B2; KR960005760B1; CA2046780A1; AU632953B2; JPH0490408A; KR920004770A; AU8049991A

Abstract

A kind of slurry burner, it consists of a combustion liner that comprises the fuel supply hole, with a plurality of nozzle medium supply holes, a burner platform that includes the fuel distribution cavity, determine that with a plurality of first hybrid chambers the fuel that the fuel distribution cavity is supplied with mixes with the ejection medium that the ejection medium hole of combustion liner is supplied with, with a burner nozzle that includes second hybrid chamber, second mixing chamber is arranged between burner nozzle and the burner platform, fuel and ejection medium mixture in order to first hybrid chamber of spontaneous combustion in future device plate mix, with a plurality of spouts, mixture sprays slurry burner by spout.

Description

Slurry burner

The present invention relates to a kind of burner, particularly relate to a kind of burner that is used as fuel such as the slurries of water and coal dust intermixture (CWM).

As shown in Figure 3, common slurry burner comprises combustion liner 1, burner platform 4, burner nozzle 7 and nozzle nut 10, wherein nozzle nut 10 be assemblied in combustion liner 1, burner platform 4 and burner nozzle 7 around, they (for example are fixed together, can be referring to disclosed Japanese Utility Model patent, publication number 204133/87).Combustion liner 1 comprises a central burner supply hole 2 and a plurality of ejection medium supply hole 3, these ejection medium supply holes 3 by the spaced relationship that goes in ring be set in fuel supply hole 2 around.Burner platform 4 comprises a fuel distribution cavity 5 that is communicated with burning supply hole 2, fuel distribution cavity 5 includes the fuel channel of distribution by 2 feedings of fuel supply hole, also has a plurality of first hybrid chambers 6 to be used for determining to be mixed with the ejection medium of sending to from ejection medium supply hole 3 by the fuel of fuel distribution cavity 5 by pipeline 5a feeding.Burner nozzle 7 comprises second hybrid chamber 8 that is connected with first hybrid chamber 6 so that make fuel and ejection medium further mixes, also have a plurality of being located at away from the spout 9 on burner nozzle one end of burner platform 4, in order to mixture is sprayed slurry burner.

A kind of such as high density water and coal dust slurries fuel and a kind ofly be introduced in the combustion liner 1 such as compressed-air actuated ejection medium, then, fuel and ejection medium flow in the burner platform 4 from fuel supply hole 2 and ejection medium supply hole 3 respectively, in burner platform 4, fuel flows to first hybrid chamber 6 from fuel distribution cavity 5, and mix with ejection medium, mixture enters in the burner nozzle 7 then, mixture is well mixed in second hybrid chamber 8, after this, mixture sprays slurry burner by spout.

Highdensity water and coal dust slurries have very high abrasiveness, and for this reason, burner platform 4 and a kind of high-abrasive material of burner nozzle 7 usefulness are protected.

An object of the present invention is to provide a kind of slurry burner, wherein fuel of sending to from a plurality of first hybrid chambers and ejection medium mixture since the result of collision be evenly distributed on second hybrid chamber, and with the inner surface of retarded flow to second hybrid chamber (or burner nozzle), mixture is well mixed in second hybrid chamber, thereby make the wearing and tearing of burner nozzle inner surface reduce to minimum degree, and mixture is sprayed with uniform state.

Another object of the present invention provides a kind of slurry burner, wherein when fuel is mobile along the second hybrid chamber inwall, stand the effect of shearing force, so that eliminate the big fuel that drips under the injection situation.

According to slurry burner provided by the invention, it consists of: a combustion liner that includes the fuel supply hole, supply with fuel slurry by this hole; A plurality of ejection medium supply holes provide ejection medium by these holes; A burner platform that includes the fuel distribution cavity, this fuel distribution cavity is determined the distribution of fuel; A plurality of first hybrid chambers determine that the fuel that the fuel distribution cavity is supplied with mixes with the ejection medium that combustion liner ejection medium supply hole is supplied with; A burner nozzle that includes second hybrid chamber, second hybrid chamber are arranged between burner nozzle and the burner platform, further mix in order to the fuel and the ejection medium mixture of first hybrid chamber of spontaneous combustion in future device plate; Also have a plurality of spouts, mixture sprays slurry burner by spout, and wherein first hybrid chamber has accordingly, mixture is along its axis that flows, these axis obliquely mutually intersection in second hybrid chamber.

For slurry burner of the present invention, the fuel that is in slurry condition at first is fed into first hybrid chamber from the fuel supply hole of the combustion liner fuel distribution cavity by burner platform, ejection medium also enters into first hybrid chamber of burner platform from the ejection medium supply hole of combustion liner, with fuel mix.Then, synthetic mixture enters into second hybrid chamber of burner nozzle, after mixture is further mixed in second hybrid chamber, is sprayed from spout to be used for burning.When mixture flowed out first hybrid chamber, they interacted in second hybrid chamber, had so just produced the collision effect of mixture, thereby had made mixture uniform.Mixture is ejected slurry burner after fully mixing in second chamber.

The uniform mixture that makes in second hybrid chamber so just makes the wear extent of burner nozzle significantly descend to be lower than the inner surface that mixture flows out the speed collision burner nozzle of first hybrid chamber.

In addition, all the mixture in second hybrid chamber forms the burner oil of uniform state.

Because fuel is introduced from first hybrid chamber and is produced collision the process of second hybrid chamber, makes fuel reach abundant mixing.When fuel flows along the inwall of second hybrid chamber, afford the effect of shearing force.So just produce one deck fuel film and eliminate the big fuel that drips in the course of injection.

Fig. 1 is the sectional view according to the slurry burner of one embodiment of the invention;

Fig. 2 represents the sectional view of slurry burner in use;

Fig. 3 is the sectional view of slurry burner commonly used.

Fig. 4 represents a steam generator system figure that burner of the present invention is housed.

Describe the present invention referring now to accompanying drawing in detail by example.

Fig. 1 represents one embodiment of the present of invention, and same element indicates as same numeral used among Fig. 3.

In the present embodiment, six first hybrid chambers 6 are determined on burner platform 4 with the equidistant relation of annular, these first hybrid chambers 6 slope inwardly towards second hybrid chamber 8, and mutual intersection is in a C, the position of point C preferably like this, be that l/L is 0.5-0.8, wherein l is the distance between a C and burner nozzle 7 inner faces, and L is the inner length of burner nozzle 7.

Burner nozzle 7 has eight spouts 9 that equidistantly concern setting with annular.

In the present embodiment, combustion liner comprises a central tube or interior pipe 1A and an outer tube 1B, and these pipes are coaxial, and ring flange 1a extends radially outwardly from the end of interior pipe 1A, contacts with burner platform 4.Interior pipe 1A is provided with fuel supply hole 12, and in order to receive by the water of pipeline 12 and the mixture (CWM) of coal dust, a plurality of holes that form in the ring flange 1a of interior pipe 1A are ejection medium supply holes 3, and steam moves by these orifice flows.

In the embodiment shown in fig. 1, be positioned at a part first hybrid chamber 6 on pipeline 5a top, its diameter is less than the remainder of first hybrid chamber 6.

The structure of residue member is similar with structure shown in Figure 3 except wear-resisting material is arranged.

For the slurry burner of this structure, the fuel that is in slurry condition enters into first hybrid chamber 6 from the fuel supply hole 2 of combustion liner 1 by a fuel distribution cavity 5.Ejection medium flows to first hybrid chamber 6 of burner platform 4 from ejection medium supply hole 3, so that and fuel mix.Fuel and ejection medium are further mixed in second hybrid chamber 8, and then, fuel sprays from spout 9 to be used for burning.Mixture flows out from first hybrid chamber 6, interacts in second hybrid chamber 8.By this arrangement, before mixture sprays from spout 9, owing to collision can be scattered it uniformly.

Uniformly dispersing in second chamber 8 makes mixture can be lower than the inner surface that its speed that flows out first hybrid chamber 6 is collided burner nozzle 7, so just causes the wearing and tearing of burner nozzle 7 significantly to descend.

As shown in Figure 2, because fuel produces collision from the process of first hybrid chamber, 6 introducings, second hybrid chamber 8, make fuel reach abundant mixing.Fuel affords the effect of shearing force when the inwall of second hybrid chamber 8 flows.So just produce one deck fuel film and eliminate the big fuel that drips in the course of injection.

Burner nozzle 7 and burner platform 4 are easy to wear, preferably make of the ceramic material (as silicon nitride) that wearability is arranged.

In the present invention, after burning was finished, preferably the fuel supply hole 2 in slurry burner was sent into water, steam or air, so that clear up or remove remaining waste residue.

Shown in Figure 4 is the detailed description that is used in the fuel system in the boiler 21 that burner 20 is housed to.

The mixture of a kind of water and coal dust (CWM) enters jar 32 by conduit 31.Then, mixture enters two independent

spiral fuel charges

35 and 36 from jar 32 by a pair of corresponding pipeline 33 and 34.Pump 35 links to each other with burner 20 with 38 by a pair of filter 37 with 36, and mixture flows to burner 20 by filter 37 and 38 from

pump

35 and 36 like this.39 and 40 is pipelines, by this pipeline, excessive water and the mixture of coal dust (CWM) is turned back to jar 32,41st, is contained in the heavy oil burner on the boiler 21, the 42nd, and heavy oil feeding pipeline.Filter 37 and 38 is can operate to be used for separate small particles, and granule is isolated in the slurry mud separator 43 of the mixture of water and coal dust successively, like this, turns back in jars 32 through isolated granule again.The 44th, automatic combustion controller (ACC), it can respond the mixture quantity delivered of boiler load control water and coal dust.

Claims

1, a kind of slurry burner is characterized in that:

A combustion liner that includes a fuel supply hole provides fuel and a plurality of ejection medium supply hole of slurry condition by this hole, supplies with ejection medium by these holes,

A burner platform that includes a fuel distribution cavity, this fuel distribution cavity is determined the distribution of fuel, with a plurality of first hybrid chambers, these chambers determine that the fuel that described fuel distribution cavity is provided mixes with the ejection medium of the ejection medium supply hole supply of described combustion liner and

A burner nozzle that includes one second hybrid chamber, second hybrid chamber is arranged between burner nozzle and the described burner platform, in order to mix from fuel and ejection medium mixture in described first hybrid chamber of described burner platform, with a plurality of spouts, mixture is by this spout ejection slurry burner

Described first hybrid chamber has corresponding axis, and mixture flows along axis, and the mutual obliquely intersection of described these flow axes is in described second hybrid chamber.

2, according to the slurry burner of claim 1, it is characterized in that, l/L is 0.5-0.8, wherein l is the inner surface of described burner nozzle and the axial distance between point, the described axis intersection of described first hybrid chamber is in this point, and L is the axial distance between the inner surface of end face of described burner platform and described burner nozzle.

3, according to the slurry burner of claim 1 or 2, it is characterized in that, described fuel distribution cavity centering is arranged on one side of described burner platform, be arranged on around the described fuel distribution cavity with the equidistant relation of annular with described a plurality of first hybrid chambers, it is characterized in that described fuel distribution cavity and described first hybrid chamber are interconnected by pipeline.

According to the slurry burner of claim 1 to 3, it is characterized in that 4, described burner combustion device plate comprises having six first hybrid chambers at least.

According to the slurry burner of claim 1 to 4, it is characterized in that 5, described burner nozzle comprises having eight spouts at least.

According to the slurry burner of claim 1 to 5, it is characterized in that 6, described spout is arranged on the described burner nozzle with the equidistant relation of annular.

According to the slurry burner of claim 6, it is characterized in that 7, the described spout of burner nozzle quantitatively will be more than described first hybrid chamber of burner platform.

According to the slurry burner of claim 1 to 3, it is characterized in that 8, slurries are mixtures of water and coal dust.