CN2662078Y

CN2662078Y - Gas solid bifuel mixed mode burner nozzle

Info

Publication number: CN2662078Y
Application number: CN 03253359
Authority: CN
Inventors: 刘东亮; 严国安; 董志民; 张觉灵; 马志民; 韩新海
Original assignee: Shijiazhuang Iron and Steel Co Ltd
Current assignee: Shijiazhuang Iron and Steel Co Ltd
Priority date: 2003-09-09
Filing date: 2003-09-09
Publication date: 2004-12-08
Anticipated expiration: 2013-09-09

Abstract

The utility model relates to a gas-solid dual-fuel compound burner, belonging to the technical field of combustion equipment, which overcomes the defects of the existing single type burner, which is unstable heating and low combustion efficiency. The burner with a nozzle in the front is improved to the burner which is provided with solid fuel, gas fuel and three combustion-supporting air passageways with three outlets influx at the nozzle in the front part of the nozzle. The heating furnace which adopts the compound burner is not affected by gas supply fluctuation and low combustion efficiency of the solid, which is characterized in stable furnace temperature, good continuity, sufficient combustion and high combustion efficiency, particularly suitable for the installation and application for the production of lime, alloy baking and steel rolling.

Description

The compound burner of gas-solid double fuel

Technical field

The utility model relates to the heating furnace burner, belongs to the combustion apparatus technical field.

Background technology

Burner is installed on the heating furnace, is used to introduce gas or solid fuel and makes it burn at the spout place.Existing burner is the burner that uses single solid or gas fuel source, the burner of this kind single type has following disadvantage in the use that is used for heating furnace: the heating furnace that the pure gas fuel nozzle is installed occurs the furnace temperature instability through regular meeting because of the under-supply and frequent fluctuation of gaseous fuel, furnace temperature can not keep successional defective at work; The heating furnace that single solid fuel burner is installed then can be because of the relatively low deficiency that has the relative decline with performance of heating efficiency of solid-fuelled ignition temperature and efficiency of combustion.The use limitation of above-mentioned single type burner and defective have badly influenced the work quality and the efficient of heating furnace, and and then feed through to the stable operation of heating furnace place production line, so the approach that must seek to solve.

Summary of the invention

Technical problem to be solved in the utility model provides the compound burner of a kind of gas-solid fuel, to overcome the low defective of heat supply instability, efficiency of combustion that the single type burner is had.

The alleged problem of the utility model realizes with following technical solution:

The compound burner of a kind of gas-solid double fuel has the burner body in the formation, burner body front end has spout, is improved to, and is provided with solid fuel, gaseous fuel and combustion air passage in the described burner body, and the outlet of three passages compiles at the spout place of burner front end.

The compound burner of above-mentioned gas-solid double fuel, described solid fuel, gaseous fuel and combustion air passage are respectively tubular body, and suit forms bushing type burner body, solid fuel pipe 1A is positioned at the center, gaseous fuel pipe 2A and combustion-aid air pipe 3A successively around.

The compound burner of above-mentioned gas-solid double fuel, the outlet of the relative gaseous fuel pipe of the outlet 2A of described solid fuel pipe 1A is extended forward, and the outlet of the relative air-breathing pipe of the outlet 3A of described gaseous fuel pipe 2A is extended forward, forms stepped spout at burner body front end.

The compound burner of above-mentioned gas-solid double fuel, described solid fuel passage is a tubular body, described fuel gas passage and air-breathing passage are respectively box-shaped body, a plurality of solid fuel pipe 1B are arranged among the gas fuel tank 2B, gas fuel tank 2B then is arranged in combustion air case 3B, the nozzle of described burner front end adopts diversion structure, current divider 4B is a tubular, be distributed on the gas fuel tank 2B, the corresponding current divider 4B of the outlet of each solid fuel pipe 1B also is positioned at it, leave space 3B-2 between the outer tube wall of current divider 4B and the combustion air case 3B, this space is the combustion air channel outlet.

The compound burner of above-mentioned gas-solid double fuel, described current divider 4B is the Long Circle tube, the outlet of described solid fuel pipe 1B is positioned at the center of Long Circle hollow chamber.

The compound burner of above-mentioned gas-solid double fuel, the front end of described current divider 4B is set up flow distribution plate 4B-1, flow distribution plate by gripper shoe 4B-2 crossbearer in current divider the place ahead, its cross section is a triangle, leg-of-mutton drift angle inwardly, the baseplane outwardly.

The utlity model has following characteristics:

1. can introduce gas, solid fuel and combustion air simultaneously, and make it to compile mixed combustion at the spout place, when the appearance gaseous fuel is under-supply or unstable, can remedy by regulating solid-fuelled proportional quantity, when gaseous fuel is in liberal supply, then can pass through the heat supply of downward modulation solid fuel proportional quantity balance, and utilize the high characteristic of gaseous fuel temperature to improve solid-fuelled ignition temperature and efficient;

2. occurring by solid fuel burner to be burnt away under the gaseous fuel situation out of stock, thereby the blowing out fault that can avoid the pure gas fuel nozzle to cause helps the continuity that heating furnace and place production line thereof keep production;

3. the sleeve structure burner that provides has compact conformation, and volume is little, is easy to characteristics such as processing and fabricating;

4. the case structure burner that provides has big, the combustion stablized characteristics of heating load;

5. the current divider that provides has solved the problem of compiling of Exit to all routes in the case structure burner, and can improve the uniformity and the stability of burning by the flow distribution plate expansion burning angle of setting up;

Adopt heating furnace of the present utility model to have not to be subjected to the characteristic of factor affecting such as air feed fluctuation and solid combustion efficient are low, furnace temperature is stable and can keep continuity, fuel combustion is abundant, and the efficiency of combustion height is installed and used on the heating furnace in productions such as lime, alloy baking, steel rolling of suiting.

Description of drawings

Fig. 1 is that the utility model adopts the sleeve structure schematic diagram;

Fig. 2 is that the utility model adopts the case structure schematic diagram;

Fig. 3 be among Fig. 2 K to view;

Fig. 4 is a B-B cutaway view among Fig. 3;

Fig. 5 is an A-A profile among Fig. 2.

The specific embodiment

Consult Fig. 1, when adopting sleeve structure, the caliber minimum of solid fuel pipe 1A is positioned at the center, and the caliber maximum of air-breathing pipe 3A is positioned at outermost layer, and the solid fuel channel cross-section be circular, and all the other the two be annular.That 1A-1,2A-1,3A-1 are respectively is solid, the input port on gas fuel channel and the combustion air passage, is connected with three bodys respectively.Gaseous fuel pipe 2A solid fuel pipe 1A extends forward successively, forms stepped diminishing spout at the burner front end.Each body can be illustrated pipe, also is the body of shapes such as ellipse, Long Circle, square circular certainly.

Consult Fig. 2,3,4,5, when adopting case structure, the solid fuel passage is a tubular body, and gaseous fuel and combustion air passage are box-shaped body.At this moment, the quantity of solid fuel pipe 1B is a plurality of, be arranged in the gas fuel tank, and be 5 in the illustrated example, be row from top to bottom and be arranged among the gas fuel tank 2B of rectangle.Corresponding one by one 5 the current divider 4B that are distributed in gas fuel tank 2B front bottom end of the outlet of 5 solid fuel pipes, and be positioned at it, the tail end of 5 solid fuel pipes then extends to outside the gas fuel tank 2B, directly as solid-fuelled input port.The tail end of gas fuel tank 2B also extends to outside the air-breathing case 3B, and its input port 2B-1 is connected with gas fuel tank by communicating pipe 2B-2.The input port 3B-1 of combustion air case 3B is set directly on the combustion air case 3B.Gaseous fuel is by hollow chamber's output of current divider 4B, and solid fuel is by the solid fuel channel outlet output that is positioned at it, and then by the 3B-2 output that interspaces in advance between current divider and the combustion air case 3B, the three is in the front end mixed combustion of current divider 4B for combustion air.It is oblong tube that current divider 4B can be cross section shown in Figure 3, and also adopting cross section is the tube of circle, ellipse, square circular etc., and during for circular cylinder, the tube internal diameter should be greater than the external diameter of solid fuel pipe 1B.

Consult Fig. 3,4, the flow distribution plate 4B-1 that current divider 4B front end is set up passes through two gripper shoe 4B-2 crossbearers in the place ahead of current divider, and leaves a fixed gap between the current divider.The cross section of flow distribution plate 4B-1 is a triangle, leg-of-mutton drift angle inwardly, the baseplane outwardly.By current divider come out solid and gaseous fuel along triangular ramp outwards expansion flow, enlarged the burning angle, can consolidate, gaseous fuel burns more full and uniformly.

The employed solid fuel of the utility model can be coal dust, the coke powder of 0.1～1000um, and gaseous fuel can be the coal gas that blast furnace, converter, producer etc. are produced.

Claims

1. the compound burner of gas-solid double fuel has the burner body in the formation, and burner body front end has spout, it is characterized in that, is provided with solid fuel, gaseous fuel and combustion air passage in the described burner body, and the outlet of three passages compiles at the spout place of burner front end.

2. the compound burner of gas-solid double fuel according to claim 1, it is characterized in that, described solid fuel, gaseous fuel and combustion air passage are respectively tubular body, and suit is formed bushing type burner body, solid fuel pipe [1A] is positioned at the center, gaseous fuel pipe [2A] and combustion-aid air pipe [3A] successively around.

3. the compound burner of gas-solid double fuel according to claim 2, it is characterized in that, the outlet of the relative gaseous fuel pipe of the outlet of described solid fuel pipe [1A] [2A] is extended forward, the outlet of the relative air-breathing pipe of the outlet of described gaseous fuel pipe [2A] [3A] is extended forward, forms stepped spout at burner body front end.

4. the compound burner of gas-solid double fuel according to claim 1, it is characterized in that, described solid fuel passage is a tubular body, described fuel gas passage and air-breathing passage are respectively box-shaped body, a plurality of solid fuel pipes [1B] are arranged in the gas fuel tank [2B], gas fuel tank [2B] then is arranged in combustion air case [3B], the nozzle of described burner front end adopts diversion structure, current divider [4B] is a tubular, be distributed on the gas fuel tank [2B], the corresponding current divider [4B] of the outlet of each solid fuel pipe [1B] also is positioned at it, leave space [3B-2] between the outer tube wall of current divider [4B] and the combustion air case [3B], this space is the combustion air channel outlet.

5. the compound burner of gas-solid double fuel according to claim 4 is characterized in that described current divider [4B] is the Long Circle tube, and the outlet of described solid fuel pipe [1B] is positioned at Long Circle hollow chamber center.

6. the compound burner of gas-solid double fuel according to claim 5, it is characterized in that, the front end of described current divider [4B] is set up flow distribution plate [4B-1], flow distribution plate passes through gripper shoe [4B-2] crossbearer in current divider the place ahead, the cross section of flow distribution plate is a triangle, leg-of-mutton drift angle inwardly, the baseplane outwardly.