RU2192309C2 - Battler for preparation of coal liquid fuel - Google Patents

Abstract

FIELD: equipment for boiler plants operating on coal liquid fuel. SUBSTANCE: rattler includes external and internal rotating drums installed with inclination. Internal surface of external drum and external surface of internal drum have milled teeth with a depth equal to maximum size of final value of crushed coal. Productivity of rattler is controlled by regulation of excess of linear rotation speed of external drum over linear speed of internal drum. EFFECT: reduced power consumption and metal usage. 2 dwg

Description

 The invention relates to coal-fired liquid fuel boiler plants (ULC), and can be used in the power system of public utilities.

 Known cone crusher fine crushing, including an external fixed conical surface and an inner surface that performs an eccentric rotation.

 The crushing of solid particles is carried out in a gap of variable size between two conical surfaces (Construction Machines, Directory, Moscow, Engineering, 1976, p. 361).

 The disadvantage of the cone crusher when it is used for the preparation of coal liquid fuel (ULC), with a particle size of 0-2 mm, is the difficulty of setting grain crushing grain size up to 2 mm In addition, crushing dry coal causes dusting, which is difficult to combat.

 Known drum mill for the preparation of coal liquid fuel, including a rotatably mounted drum, inside which is placed the working body, the input and output system of coal slurry (DE 3 604 745 A1, 08/20/1987).

 The disadvantage of the mill is its high energy and metal consumption.

 The objective of the invention is to reduce the energy and metal consumption of the mill for the preparation of coal liquid fuel (ULC) with a particle size of 0-2 mm

 This task is achieved by the fact that in a drum mill for the preparation of coal liquid fuel, including a rotatably mounted drum, inside which a working body is placed, a coal slurry input and output system, the outer and inner drums are mounted obliquely with the ability to control the excess of the linear speed of the outer drum according to relative to the linear speed of the inner drum, and a tooth is milled on the inner surface of the outer drum and on the outer surface of the inner drum with depth equal to the maximum size of the final size of the coal being mined.

 In FIG. 1 shows a diagram of a drum mill; figure 2 is a fragment of the teeth of the outer and inner drums.

 The drum mill for the preparation of coal liquid fuel (ULC) includes an obliquely mounted rotating outer drum 1, inside of which an obliquely mounted rotating inner drum 2 is placed. On the inner surface of the outer drum and on the outer surface of the inner drum, teeth 3 are cut with a depth of "a" equal to the maximum size crushed coal. The rotation of the outer drum is carried out using a drive 4 with a constant speed. The rotation of the inner drum is carried out from an adjustable drive 5 with a variable speed.

 The work of the drum mill is as follows.

 Using the drive 4, the outer drum 1 is driven into rotation. The adjustable drum 5 is driven to rotate the inner drum 2. An initial coal slurry with particles with a particle size of 0-25 mm is fed into the input cavity of the outer drum. Milk of lime is also introduced there. As a result of rotation of the coaxially arranged obliquely external and internal drums, particles of coal are captured by the teeth 3 and pulled between the contacting surfaces of the drums. Particles of coal with a particle size less than the depth "a = 2 mm" of the teeth of the drums are pulled between the rotating drums without destruction. Particles of coal larger than "a = 2 mm", falling between the teeth due to the difference in the linear velocities of the outer and inner drums, are chipped and pass in the form of particles less than "a = 2 mm" between the contacting surfaces of the drums.

 Due to the fact that small particles of 0-2 mm coal freely pass on the contacting surfaces of the outer and inner drums, and particles larger than 2 mm are crushed in the cleaving mode, the energy consumption of the process for producing coal liquid fuel with a particle size of 0-2 mm using a drum shearing mill will be minimal .

Claims (1)

 A drum mill for the preparation of coal liquid fuel, including a rotatably mounted drum, inside which a working body is placed, a coal slurry input and output system, characterized in that the working body is made in the form of a drum, while the external and internal drums are mounted obliquely with the possibility of regulation excess of the linear speed of the outer drum relative to the linear speed of the inner drum, and on the inner surface of the outer drum and on the outer surface of the inner th drum tine milled with a depth equal to the maximum size of a final value razdrablivaemogo coal.

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