Burner

 

(57) Abstract:

Usage: in heat engineering, foundry and metallurgical production in heating processes, in particular for heating the lining of ladles and mixers in the melting Department. Goal : improving the quality of combustion. The inventive burner consists of a casing with pipe supply air nozzles of the tunnel. The unit is attached from the side of the tunnel axially intermediate fitting with a cylindrical channel, and the output of the gas-feeding pipe in the housing is located axially confused nozzle, the cross-section of which is inserted in the channel intermediate fitting with the formation of the annular gap between the wall confused nozzle and the inner surface of the intermediate channel of the nozzle. The diameter of the output section confused nozzle is equal to 0.2 - 0.3 of the diameter of the channel intermediate fitting. The positive effect of increased temperature in the torch, performance is improved when the heating of the lining of various buckets and mixers, improving the quality of castings, reducing metal losses due to better heat lining and a smaller decrease in the temperature of the liquid metal. 1 Il.

The invention relates to heat engineering, in particular to oborudovaniya, Central gas-feeding pipe and the tunnel connected to the chassis [1]. When using this burner is not achieved desired to heat lining high quality combustion.

The aim of the invention is to improve the quality of burning.

We offer research-based burner includes a housing with pipe supply air, Central gas-feeding pipe, tunnel and differs from the well-known fact that between the body and the tunnel is established in addition the connecting piece with a cylindrical channel, and the output of the gas-feeding pipe is installed confused nozzle, the cross-section of which is inserted in the channel fitting with the formation of the annular gap between the outer wall of the nozzle and the inner surface of the fitting, and the ratio of the diameter of the output section confused nozzle and the diameter of the channel intermediate the fitting is equal to 0,2 ... 0,3.

The drawing shows the proposed burner, longitudinal section.

The burner consists of a housing 1 with pipe supply air nozzle 2 tunnel 3. The housing 1 is attached from the side of the tunnel 3 axially intermediate the nozzle 4 with a cylindrical channel 5, and the output of the gas-feeding pipe in the casing 1 is placed axially confuser the external wall 7 confused nozzle and the inner surface of channel 5 intermediate fitting 4. The diameter d of the outlet cross section of confused nozzle 6 is equal to 0,2 ... 0,3 diameter d1channel 5 intermediate fitting 4. With this design of the burner raises the temperature in the plume. When d = (0,2 - 0,3)d1results in the best possible conditions for mixing gaseous fuel with air, which contributes to reducing the length of the torch and the increase in temperature, to improve the quality of combustion. When d < 0,2 d1and d > 0,3 d1worsen conditions for mixing fuel gas with air, the length of the torch sharply increases and the temperature decreases sharply.

The proposed burner works as follows.

In case 1 is compressed air, which passes through the annular channel formed between the walls 5 and 7, and then expire at the output section confused nozzle 6 in the form of seeking to centerline confused nozzle 6 of the thread. After that confused the nozzle 6 is supplied combustible gas at low pressure or average. For the output section confused nozzle 6 on the short path of the gas stream is mixed with air, gas and air mixture enters the nozzle 2, goes into the tunnel 3, which is ignited, forming a burning torch.

In table. 1 presents tekhnicheskogo section of the burner tunnel) depending on the relationship d/d1.

From table. 2 it follows that the optimum is achieved when d = (0,2 - 0,3) d1.

When testing the burner prototype temperature in the plume did not exceed 1350aboutC.

This stove is designed to heat the lining of ladles and mixers in the melting offices of foundry and metallurgical plants.

BURNER, comprising a housing with a pipe supply air, Central gas-feeding pipe and the tunnel connected to the housing, characterized in that, with the aim of improving the quality of combustion between the housing and the tunnel is established in addition the connecting piece with a cylindrical channel, and the output of the gas-feeding pipe is installed confused nozzle, the cross-section of which is inserted in the channel fitting with the formation of the annular gap between the outer wall of the nozzle and the inner surface of the fitting, and the ratio of the diameter of the output section confused nozzle and the diameter of the channel intermediate fitting is of 0.2 - 0.3.

 

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