SU142653A1 - Vertical rotary firing machine - Google Patents

Description

Vertical round rotary kiln machines made with are known. funnels chutes, vacuum chamber, hydraulic gate, transporting means, working on gas or other fuel.

The proposed machine differs from the known ones in that the working space of the machine is divided into three zones, with an annular gas distributor embedded in the middle zone, from which gas flows through the holes into the working space of the middle zone of the mask. This division of the working space into three zones provides for firing the material in the middle zone, drying the source material in the upper zone due to the upward flow of hot gases and cooling the finished product in the lower zone due to cold air flowing through it.

The proposed machine is particularly suitable for firing pellets made from fine iron ore concentrates at a temperature of 1200-1300 °.

The drawing shows the proposed roasting machine.

It is known that the most rational method of burning pellets is their burning by burning gas in a layer. Therefore, the proposed roasting machine is intended mainly for work on the principle of burning gas (liquid fuel) in the bed by the suction method.

The raw pellets are fed through the funnel 1 into the rotating working space 2, which has an annular cross-section in the horizontal plane, and a trapezoidal in the vertical plane, which makes it easier to lower the calcined mass and to unload it after the calcination.

The outer surface of the working space consists of a metal casing 3 articulated in the upper part by means of brackets-plates 4 with a metal casing 5 of the inner surface of the working space, closed by a cap 6. The casing 5 is fixed on the circular disk 7, which rotates on. the support rollers 8, mouth number 142653-2; ;, 1d:. j on the columns 9. The rotation of the machine is expelled from a direct current electric motor (with a large range of regulation oi qtpjOTOB), gearbox and a pair of gears 10.i

I In the upper part of the casing 3 there is a water shutter / U in which the flooding is supplied to the iodine line 12. The stationary hood / vacuum chamber is / is with the upper part of the working space of the machine. The hood-vacuum chamber 13 ends with a gas outlet 14, we go to the nTii separator and, further, to the exhauster for suction of gases formed during the calcining of materials.

Gas (liquid fuel) in the burning layer is supplied through a fixed pipeline 15, to which a water seal 16 is attached. The rotating oil pipe 17 is connected to the water seal 16 and feeds the gas to the annular gas distributor 18 through the holes. workspace. The articulation of the fixed gas pipeline 15 with the movable (rotating) gas supply pipe 1 can also be carried out through the gland packing, i.e., without a water seal.

According to the height of the layer in the working space there are three zones: the zone a of heating the air sucked through the holes 20 in the casing 5 and through the layer of burned pellets from the casing 3 in which the burned pellets are intensively cooled; zone b - roasting and area в-drying pellets.

The finished burned and cooled pellets from the rotating machine are cut by a knife 21 (section along A-A) to the conveyor devices 22 and directed to the destination.

The metal housings 5 and 5, which form the working space of the firing machine, are cooled with water that flows into the pipes or piers in the housings. Water to the cooling elements is supplied along a rotating water supply system 23 mounted in the gas outlet 14 along with the machine. The water supply system rotates in the stuffing box seal. Water for cooling metal shells 5 and 5 can also come from the water seal 11. Cooling of the shells 5 and 5 in the highest-temperature middle zone can also be done by external watering with hot water in the water seal 16. Water from water, the shutter // and the cooling system of the shells 5 and 5 are discharged through pipes 24 and 25 into the water shutter 16, from where the pipe 26 is discharged into the channel-channel 27.

In the working space of the maschine gas can also be supplied through the outer casing 5 through the annular gas distributor 28 and gas pipeline 29.

For ventilation of the internal space under the cap 6, a valve 30 is installed that allows air-gas to pass through the vacuum chamber 13.

For salsigani gas and monitoring the firing process on the outer casing 3 installed chapters 31.

The machine can burn pellets and a combination of fuel, as well as burning solid fuel, rolled on their surface. In the latter case, the described gas (liquid fuel) supply system will be used to ignite solid fuel at the time the machine is started, and then it will be turned off and can only be turned on again if the machine is permanently stopped (to repeat the ignition cycle).

To burn fuel into the working space of the machine, air can also be supplied under pressure. In this case, the air supply is carried out according to the methods outlined above in the description of the design of the gas supply and water supply systems.

In conclusion, the Dnipropetrovsk Economic Council noted that the proposed machine will be built and tested at the Krivoy Rog Southern Mining and Processing Plant for burning pellets.

Subject invention

A vertical rotary firing machine using a feed funnel, a vacuum chamber, water locks, and discharge means, characterized in that, in order to burn fuel in the middle zone of the vertical layer of the calcined material while simultaneously drying the feedstock in the upper zone due to the upward flow hot gases and cooling of the finished product in the lower zone due to cold air being projected through it, the machine is divided into three zones, with an annular gas distributor, from which gas is hole enters the workspace middle zone of the machine.

H-LH 142653