CN203068517U - Gas burner for rotary kiln - Google Patents

Abstract

The utility model discloses a gas burner, in particular relates to a gas burner for a rotary kiln, and belongs to the technical field of metallurgical equipment accessories manufacturing. A gas burner for a rotary kiln is provided which can achieve excellent results in the length and shape of the roasting flame during use. The gas burner includes a gas sleeve and an air sleeve sleeved outside the gas sleeve. There is an air delivery gap between the inner wall of the air sleeve and the outer wall of the gas sleeve. There is a conical mixing zone outside the output end of the gas sleeve.

Description

A gas burner for a rotary kiln

technical field

The utility model relates to a gas burner, in particular to a gas burner for a rotary kiln, belonging to the technical field of metallurgical equipment accessories manufacturing.

Background technique

In the rotary kiln sintering process, most of the heat energy required for raw meal calcination is transmitted through flame light radiation, so the temperature and shape of the flame are very important. Evenly distributed flame temperature is very beneficial to clinker calcination, and the stability of flame will ensure the stability of clinker calcination quality and the safety of equipment operation. Therefore, a moderately long flame with stable temperature and shape is most conducive to the combustion of gas, the calcination of pellets, the extension of the life of the kiln skin and burner, and the stability of the sintering atmosphere in the kiln. The length and shape of the flame are controlled by the structure of the burner, and the temperature of the flame is controlled by the gas flow rate and the ratio of air and gas. Therefore, to achieve the best flame length, temperature and shape, a gas burner with a reasonable structure is required.

Utility model content

The technical problem to be solved by the utility model is to provide a gas burner for a rotary kiln that can achieve excellent effects on the length and shape of the roasting flame during use.

The technical solution adopted to solve the above technical problems is: a gas burner for a rotary kiln, including a gas sleeve and an air sleeve sleeved outside the gas sleeve, and the inner wall of the air sleeve and the gas sleeve There is an air delivery gap between the outer walls of the air sleeve, and there is a conical mixing zone outside the output end of the gas sleeve in the air sleeve.

Further, connecting flanges are respectively provided on the rear end of the air sleeve and the middle and rear section of the gas sleeve, and the gas sleeve and the air sleeve that are socketed together are fixed through the connecting flanges.

Further, an air delivery gap positioning block is arranged on the outer wall of the front end of the gas casing.

Further, the gas burner also includes an air input port and a gas input port, the air input port is arranged on the pipe wall of the air sleeve close to the connecting flange, and the gas input port is arranged at the rear end of the gas sleeve.

Further, there is also a diameter reducing section between the gas inlet and the connecting flange, and the gas inlet is arranged at the input end of the diameter reducing section.

The beneficial effect of the utility model is that: by setting a conical mixing zone outside the output end of the gas sleeve in the air sleeve, the gas input through the gas sleeve and the combustion air input through the air sleeve are first in the After mixing in the conical mixing zone, the combustion takes place outside the output end of the air sleeve. In this way, the length and shape of the roasting flame can be effectively controlled, so that the length and shape of the flame can reach the best effect.

Description of drawings

Fig. 1 is a structural schematic diagram of a gas burner for a rotary kiln of the present invention.

The marks in the figure are: gas sleeve 1, air sleeve 2, air delivery gap 3, mixing zone 4, connecting flange 5, positioning block 6, air input port 7, gas input port 8, and variable diameter section 9.

Detailed ways

As shown in Figure 1, it is a gas burner for a rotary kiln that can make the length and shape of the roasting flame reach an excellent effect during use provided by the utility model. The gas burner includes a gas sleeve 1 and an air sleeve 2 sleeved outside the gas sleeve 1. There is an air delivery gap 3 between the inner wall of the air sleeve 2 and the outer wall of the gas sleeve 1. There is a conical mixing zone 4 outside the output end of the gas sleeve 1 in the air sleeve 2 . By setting a conical mixing zone 4 outside the output end of the gas sleeve 1 in the air sleeve 2, the gas input through the gas sleeve 1 and the combustion air input through the air sleeve 2 are first After mixing in the conical mixing zone 5, combustion is carried out outside the output end of the air sleeve 2. In this way, the length and shape of the roasting flame can be effectively controlled, so that the length and shape of the flame can reach the best effect.

In the above embodiment, in order to facilitate the connection and fixing of the gas sleeve 1 and the air sleeve 2, and to ensure the stability of the shape and length of the roasting flame, at the rear end of the air sleeve 2 and the gas sleeve 1 Connecting flanges 5 are respectively arranged on the middle and rear sections, and the gas casing 1 and air casing 2 which are socketed together are fixed through the connecting flanges 5; an air delivery gap is arranged on the outer wall of the front end of the gas casing 1 3 positioning block 6.

In the above embodiment, in order to optimize the structure of the gas burner and facilitate the connection of the gas sleeve and the external gas transmission pipe, the gas burner also includes an air input port 7 and a gas input port 8, and the air input port 7 is arranged On the pipe wall of the air sleeve 2 close to the connecting flange 5, the gas inlet 8 is arranged at the rear end of the gas sleeve 1; there is also a reducing section 9 between the gas inlet 8 and the connecting flange 5, The gas inlet 8 is arranged at the input end of the reducing section 9 .

Claims (5)

1. rotary kiln coal gas burner, it is characterized in that: comprise coal gas sleeve pipe (1) and be socketed in the outer casing air (2) of described coal gas sleeve pipe (1), between the outer wall of the inwall of casing air (2) and coal gas sleeve pipe (1), have air and carry gap (3), have the mixed zone (4) of a cone-shaped outside the output of the coal gas sleeve pipe (1) described casing air (2) in.

2. a kind of rotary kiln coal gas burner according to claim 1, it is characterized in that: the posterior segment at described casing air (2) rear end and coal gas sleeve pipe (1) is respectively arranged with adpting flange (5), and the coal gas sleeve pipe (1) that connects together and casing air (2) are fixing by described adpting flange (5).

3. a kind of rotary kiln coal gas burner according to claim 1 is characterized in that: the outer wall of coal gas sleeve pipe (1) front end is provided with air and carries gap (3) locating piece (6).

4. a kind of rotary kiln coal gas burner according to claim 1, it is characterized in that: described coal gas burner also comprises air-in (7) and coal gas input port (8), air-in (7) is arranged on the tube wall near the casing air (2) of adpting flange (5), and coal gas input port (8) are arranged on the rear end of coal gas sleeve pipe (1).

5. a kind of rotary kiln coal gas burner according to claim 4, it is characterized in that: also have a reducer (9) between coal gas input port (8) and adpting flange (5), coal gas input port (8) are arranged on the input of reducer (9).

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