SU403435A1 - REACTIVE MILL - Google Patents

Description

one

A jet mill is known, including a grinding chamber, jet burners with combustion chambers and mixing chambers, and pipelines with material feed channels.

The purpose of the invention is to improve the efficiency and productivity of the material grinding process.

In the proposed mill, the material feed channel and the combustion chamber of each jet burner are located concentrically and isolated from each other, and the mixing chamber is made in the form of a conical jet nozzle with a cylindrical part, which passes into the Laval nozzle and is combined with the output nozzle of the combustion chamber The reactive burner is provided with an annular oxidant feed channel.

The drawing shows the proposed mill.

The jet mill contains a chute chamber 1 with chute 2 for the exit of the finished product, oppositely mounted gas jet burners 3 with combustion chambers 4 and mixing chambers 5, tightly connected to the grinding chamber 1. In the combustion chamber there is a central channel 6 of the forced supply of the material being crushed, isolated from the chamber

combustion, and annular channels 7 with the profile of a reaction nozzle for supplying combustion products to the grinding chamber 1 through the mixing chamber 5. The mixing chamber 5 is formed as an output jet nozzle 8 of a gas-jet burner with a middle cylindrical part 9, which passes into the 10 Laval nozzle, using which the combustion chamber is hermetically connected to the grinding chamber.

In the gas burner, the combustion chamber and the mixing chamber have an annular oxidant supply channel 11, for example, air used in the external contour.

simultaneously for cooling.

As a result of burning the fuel in the chambers, burned gas-jet burners 3 create high-speed jets of energy carrier, which are directed through the annular channels 7 into the mixing chambers 5.

Simultaneously, forcibly, through a central channel, forcibly, for example, compressed air with low pressure, supplies the material to be destroyed.

At the exit from the central channel of the channel, the material is sucked in by the jet of energy and accelerated. Achieving the required speed is reduced by more complete mixing of the energy carrier flux and destructible material in the cylindrical part.

9 output jet nozzle 8 and acceleration of the jet of energy in the area of the seat 10, made in the form of a Laval nozzle. In the nominal chamber 1, the currents meet and the material is destroyed. The destroyed material from the grinding chamber is removed through the chute 2 by upward flow and is fed for further processing.

During operation, the gas-jet burner is cooled by a stream of compressed air, the passage w, through the annular channels 11, which simultaneously supply air and for combustion.

Subject invention

1. A reactive mill, including a grinding chamber, reactive burners with combustion chambers and mixing chambers, and pipelines with material supply drops, which, in order to increase the efficiency and productivity of the material grinding process, the material feed drops and the combustion chamber of each reactive burner are placed are concentric and isolated from each other, and the mixing chamber is made in the form of a conical

jet nozzle with a cylindrical part,

transition p1, to her in the Lawal nozzle and the combined

with the outlet nozzle of the combustion chamber of the re-burner burner.

2. Mill of claim 1, characterized in that

each reactive burner is provided with an annular oxidant feed channel.

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