CN201396761Y

CN201396761Y - Gas and air nozzle double-row staggered arranged external premixed burner in pre-combustion chamber

Info

Publication number: CN201396761Y
Application number: CN2009200902950U
Authority: CN
Inventors: 刘世聚; 陈维汉; 程欣婷; 刘力铭; 范剑超
Original assignee: ZHENGZHOU YUXING REFRACTORY MATERIAL CO Ltd
Current assignee: ZHENGZHOU YUXING REFRACTORY MATERIAL CO Ltd
Priority date: 2009-05-18
Filing date: 2009-05-18
Publication date: 2010-02-03
Anticipated expiration: 2019-05-18

Abstract

The utility model relates to a gas and air nozzle double-row staggered arranged external premixed burner in a pre-combustion chamber, which effectively solves the problems of unstable combustion nozzle flow field, uneven distribution of combustion airflow, bad nozzle adjusting function and the like brought by the enlargement of the burner. The burner adopts the structure that an air distribution ring way and a gas distribution ring way are arranged in the wall body of the burner body, two air inlet pipes are vertically arranged, and a gas inlet pipe is positioned between the two vertically arranged air inlet pipes; the air inlet end of the air distribution ring way is connected with the air inlet pipes through an airway, and the air inlet end of the gas distribution ring way is connected with the gas inlet pipe through a gas passage; two vertical staggered arranged rows of gas split-flow nozzles and air split-flow nozzles are circumferentially distributed on the inner wall of the pre-combustion chamber in the burner body; the gas split-flow nozzles are communicated with the gas passage through a gas split-flow nozzle pipe, and the air split-flow nozzles are communicated with the airway through an air split-flow nozzle pipe. The burner has the advantages of quick gas and air mixing of the burner through the staggered arrangement, high speed combustion, non pollution, high efficiency and long service life.

Description

The burner of the outer premixed combustion of the double interlaced arrangement of coal gas air nozzle in the precombustion chamber

One, technical field

The burner of the outer premixed combustion of the double interlaced arrangement of coal gas air nozzle in a kind of precombustion chamber that the utility model relates to use on the blast funnace hot blast stove.

Two, background technology

Ceramic burner is used on hot-blast stove early it.But all there is following situation in present various ceramic burner:

(1) arrangement of nozzles of coal gas and combustion air is unreasonable, can not realize mixing fast and fully of two kinds of air-flows, thereby reduce combustion intensity, and contain the not CO of combustion from cause waste gas; In order to make coal gas completing combustion not so will adopt big excess air coefficient of discharge, cause theoretical temperature combustion to reduce, and then hot blast temperature does not increase;

(2) air-flow that enters regenerator from burner can not be realized the evenly two of temperature and VELOCITY DISTRIBUTION, and its consequence is that the heat storage utilization rate descends and heat transfer-accumulation of heat poor effect, cause the hot-blast stove thermal efficiency to descend and in a large number high-temperature gases to environmental emission;

(3) the burner outlet air-flow is provided with the pulsation that inequality can cause the combustion chamber air-flow, can cause that under high load capacity continuous pipe-line system and combustion chamber produce " vibration ", especially in the hot-blast stove that has the gas well combustion chamber, burning " vibration " problem occurring is common phenomena.

Existing a kind of burner (application number 200510018053.7) has overcome the problems referred to above, but the improved place of wanting is arranged still on the structure, particularly this burner is the nozzle of single layout burner, when expansion along with the type of furnace, the single burner nozzle of layout is just had any problem in precombustion chamber, if select for use excessive jet velocity can cause the unfavorable variation of bulk flow field structure; Owing to be the single layout of burner nozzle, the rapid mixing feature of the uniformity of preheating chamber air-flow, air-flow and the regulatory function of nozzle all can be affected.Obviously, be the essential important technological problems that solves to its structure transformation.

Three, utility model content

Actual needs at above-mentioned situation and hot-blast stove gas burner, the utility model has just provided the burner of the outer premixed combustion of the double interlaced arrangement of coal gas air nozzle in a kind of precombustion chamber, can effectively solve the type of furnace and enlarge problems such as the burner noz(zle) flow field instability brought, combustion-gas flow skewness, cut-out governing function difference.The technical scheme of this utility model is, comprise burner body, air intlet pipe and gas inlet pipe, air intlet pipe and gas inlet pipe place on the burner body outer wall, there is air to distribute circuit (being the distribution circuit of combustion air nozzle air current) in the body of wall of burner body, coal gas distributes circuit (being the distribution circuit of combustion-supporting jet for gas air-flow), the air intlet pipe has two up and down, the gas inlet pipe places, between following two air intlet pipes, air distributes the inlet end of circuit to be connected with the air intlet pipe through air duct, coal gas distributes the inlet end of circuit to be connected with the gas inlet pipe through gas passage, on on the precombustion chamber inwall in the burner body there being annular spread, the coal gas shunting spout and the air of two row's interlaced arrangement are shunted spout down, coal gas shunting spout is connected with gas passage through coal gas shunting jet pipe, air shunting spout is connected with air duct through air shunting jet pipe, the structure of the utility model novelty can accomplish that gas evenly mixes fast, the burning of generation high-speed and high-efficiency, low eddy flow allows it be evenly distributed when keeping steady air current, because combustion process is carried out in precombustion chamber and combustion chamber in succession, does not have the bigger temperature difference between the two.In a word, that this burner interlaced arrangement is mixed is fast, high-velocity combustion is pollution-free, the even efficient height of air-flow, Stability Analysis of Structures life-span are long, and the market prospects of its Application and Development are wide.

Four, description of drawings

Fig. 1 is a structural profile front view of the present utility model.

Fig. 2 is the sectional view of the utility model Fig. 1.

Fig. 3 is another example structure sectional front view of the present utility model.

Fig. 4 is the sectional view of Fig. 3 embodiment.

Five, the specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is elaborated.

By shown in Figure 1, the utility model comprises burner body, air intlet pipe and gas inlet pipe, air intlet pipe and gas inlet pipe place on the burner body outer wall, there is air to distribute circuit 2 in the body of wall 7 of burner body, coal gas distributes circuit 6, air intlet pipe 1 has two up and down, gas inlet pipe 5 places, between following two air intlet pipes, air distributes the inlet end of circuit 2 to be connected with air intlet pipe 1 through air duct 3, coal gas distributes the inlet end of circuit 6 to be connected with gas inlet pipe 5 through gas passage 4, on on the combustion chamber inwall in the burner body there being annular spread, the coal gas shunting spout 8 and the air of two row's interlaced arrangement are shunted spout 9 down, coal gas shunting spout 8 is connected with gas passage 4 through coal gas shunting jet pipe, and air shunting spout 9 is connected with air duct 3 through air shunting jet pipe.

In order to guarantee result of use, it is upper and lower two that are circular layout that the air in the body of wall 7 of said burner body distributes circuit 2, and it is one that is circular layout that coal gas distributes circuit 6; Coal gas distributes in the circuit 6 parallel bodies of wall that place between upper and lower two air distribution circuit 2; Last row's air shunting spout through last air shunting jet pipe, go up the same air of air duct and distribute circuit to be connected, following row's air shunting spout through air shunting jet pipe down, down air duct with under air distribution circuit be connected; Last row's coal gas shunting spout is connected with coal gas distribution circuit through last coal gas shunting jet pipe and last gas passage, following coal gas shunting jet pipe and following gas passage respectively with the coal gas shunting spout of arranging down; Last row's coal gas shunting spout and last row's air shunting spout is interspersed on the inwall of combustion chamber, its central plane is on same horizontal plane, following row's coal gas shunting spout and the air shunting spout of arranging down are interspersed on the inwall of combustion chamber, and its central plane is also on same horizontal plane; Said coal gas shunting spout and air shunting spout central axis all have certain angle of inclination with the radial direction of combustion chamber, and preferably coal gas is shunted spout and air and shunted spout and all be 0-45 ° do not wait radially that the angle of inclination is staggered in the combustion chamber.

It is to be noted; its structure of the embodiment that Fig. 3, Fig. 4 provide and Fig. 1, structure shown in Figure 2 there is no substantial difference on the whole; its difference only is that upper and lower two air intlet pipes directly are connected by an air duct in the burner body of wall after; be connected with air duct through air shunting jet pipe with the upper and lower two emptying gas shunting spout of combustion chamber inwall again; no matter be which kind of version, as long as adopt overall structure form of the present utility model all to belong to protection domain of the present utility model.

The utility model novel structure uniqueness, gas mixes, speed is fast, and flameholding intensity is big, long service life, and the complete non-environmental-pollution that burns is compared with existing burner, has following outstanding feature:

1, burning is even, owing to adopt double rows of nozzles, mixed process is accelerated, and is disperseing the same of combustion intensity The time make combustion process more even, also be conducive to improve the stress state of pre-combustion chamber;

2, strengthen structure and stability, adopt double nozzle after the jet stream thigh reduce the percussion of precombustion chamber is weakened, especially in large-scale hot-blast stove, more can effectively avoid selecting for use excessive spout and excessive jet velocity; In the combustion chamber jet stream thigh reduce can make the uniformity coefficient in flow field improve and avoid irregular pulsation; Thereby guaranteed the stability of air velocity distribution and chamber structure;

3, reduced swirl strength, adopted after the double nozzle under the condition that combustion intensity is effectively disperseed to increase with airflow stability, the radially angle excursion that can suitably reduce air-flow to be weakening swirl strength, thereby improves the axial flow uniformity;

4, strengthen the regulatory function of nozzle, owing to there is the staggered outer mixing nozzle of two rows, factors such as its nozzle arrangements, deflection angle, jet velocity, assignment of traffic are than the single row of nozzles showed increased, its performance-adjustable also just obtains improving, and just can seek more reasonably nozzle arrangements and overall performance.

Claims

1, the burner of the outer premixed combustion of the double interlaced arrangement of coal gas air nozzle in a kind of precombustion chamber, comprise burner body, air intlet pipe and gas inlet pipe, air intlet pipe and gas inlet pipe place on the burner body outer wall, it is characterized in that, there is air to distribute circuit (2) in the body of wall of burner body (7), coal gas distributes circuit (6), air intlet pipe (1) has two up and down, gas inlet pipe (5) places, between following two air intlet pipes, air distributes the inlet end of circuit (2) to be connected with air intlet pipe (1) through air duct (3), coal gas distributes the inlet end of circuit (6) to be connected with gas inlet pipe (5) through gas passage (4), on on the combustion chamber inwall in the burner body there being annular spread, the coal gas shunting spout (8) and the air of two row's interlaced arrangement are shunted spout (9) down, coal gas shunting spout (8) is connected with gas passage (4) through coal gas shunting jet pipe, and air shunting spout (9) is connected through the air shunting same air duct of jet pipe (3).

2, the burner of the outer premixed combustion of the double interlaced arrangement of coal gas air nozzle in the precombustion chamber according to claim 1, it is characterized in that, air in the body of wall of said burner body (7) distributes circuit (2) on being circular layout, following two, coal gas distribution circuit (6) is of annular spread, coal gas distributes parallel the placing of circuit (6), in the body of wall between following two air distribution circuits (2), last row's air shunting spout is through last air shunting jet pipe, the same air of last air duct distributes circuit to be connected, following row's air shunting spout warp is air shunting jet pipe down, the same air down of following air duct distributes circuit to be connected, last row's coal gas shunting spout and the coal gas of arranging are down shunted spout respectively through last coal gas shunting jet pipe and last gas passage, following coal gas shunting jet pipe and following gas passage distribute circuit to be connected with coal gas, last row's coal gas shunting spout and last row's air shunting spout is interspersed on the inwall of combustion chamber, its central plane is on same horizontal plane, following row's coal gas shunting spout and the air shunting spout of arranging down are interspersed on the inwall of combustion chamber, and its central plane is also on same horizontal plane.

3, the burner of the outer premixed combustion of the double interlaced arrangement of coal gas air nozzle in the precombustion chamber according to claim 1, it is characterized in that said coal gas shunting spout and air shunting spout all are 0～45 ° and do not wait radially that the angle of inclination is staggered in the combustion chamber.