RU2214448C2 - Plant for two-stage production of water-and-coal fuel - Google Patents

Abstract

FIELD: coal-mining industry, power engineering. SUBSTANCE: invention is related to preparation of water-and-coal fuel with its subsequent burning. Plant includes suspension classifier, vibratory-wave vertical multichamber mill with 1-6 mm amplitude of working tool and its rotation speed of 1400-2000 rpm, line supplying water to mill and vibratory-wave tore mixer-homogenizer with 1-4 mm amplitude of vertical working tool and 1-6 mm amplitude of horizontal working tool. Mill contains up to 1500.0 kg of milling bodies with diameter from 15 to 50 mm. Mixer- homogenizer contains up to 2000.0 kg of milling bodies with diameter from 10 to 40 mm. Invention makes it feasible to decrease considerably energy consumption for production of water-and-coal fuel, in particular 25.0 kW of electric energy is consumed for preparation of 1.0 t of water-and-coal fuel. EFFECT: considerably decreased energy consumption for preparation of water-and-coal fuel. 2 cl, 1 dwg

Description

 The invention relates to the preparation of water-coal fuel (HLF) for its subsequent combustion and can be used in the coal industry and energy.

 A multi-stage installation of VUT production is known, which contains roll rotary drum crushers with rods as crushing elements on the 1st stage, drum reels on the 2nd stage, vibration rods with rods on the 3rd and 4th crushers with balls. Suspension is recirculated at one or more stages of grinding. The reagent additive is introduced in front of the individual grinding stages as a new surface is revealed (German application 3509330, С 10 L 1/32, September 25, 86).

 Also known is a two-stage installation of VUT production, including a slurry classifier, a ball mill, a water supply line to the mill, a device for additional grinding and homogenization of a mixture of coal and water particles, which is a 2nd ball mill, a reagent and mixture supply line to the 2nd ball mill (Japanese application 63-15893, C 10 L 1/32, 01/22/08).

 A disadvantage of the known installations is the significant energy consumption for the preparation of the fuel-efficient compound.

 The aim of this invention is to reduce energy consumption.

 This goal is achieved by the fact that the installation contains a suspension classifier, a vertical vibrational multi-chamber mill with an amplitude of the working body of 1-6 mm and a rotation frequency of 1400-2000 rpm, a water supply line to the mill, and a vibration-wave torus-type homogenizer with the amplitudes of the vertical working body 1-4 mm and horizontal - 1-6 mm and a frequency of rotation of 1400-2000 rpm and the feed line of the reagent and a mixture of coal and water particles from the mill into the mixer-homogenizer.

 The drawing shows the installation of cooking VUT.

 The installation consists of a plow ejector 1, a single-rotor hammer crusher 2, a vibratory sifter 3, a vibrated hopper of coal 4, a vibratory feeder with a weight batcher 5, a vibration-wave vertical multi-chamber mill MVV-0.6 6, a mixer-homogenizer of a vibration-wave torus SGVT-1 , 0 7, the storage capacity of the finished VUT 8, the accumulating reservoir VUT 9, the reagent supply tank 10, the process water tank 11.

 I - raw coal feed line. II - the line of removal of coal particles larger than 3 mm. III - the supply line of the finished fuel-and-chemical fuel to the boiler units for combustion.

 Installation works as follows.

 Coal along line I through the conveyor through the ejector 1 enters the crusher 2, from where, through the sifter 3, classified coal with particle sizes less than 3 mm enters the vibratory hopper 4. Then through the vibratory feeder 5, where the dosed water supply from its tank 11 takes place, the mixture of coal particles and water through an appropriate line is supplied to the mill 6, from where coal with an average particle size of 300 microns and a maximum size of up to 500 microns together with the reagent from the supply tank 10 enters the mixer-homogenizer 7. Ready HLF enters the storage capacity 8 and further into the tank 9.

 The preparation of fuel in the installation according to this invention helps to reduce energy consumption, for the preparation of 1 ton of fuel-efficient assembly, no more than 25 kV is required.

Claims (3)

 1. Installation of a two-stage production of coal-water fuel, including a slurry classifier, a mill, a water supply line to the mill, a device for additional grinding and homogenization of a mixture of coal and water particles, a reagent and mixture supply line to a device for additional grinding and homogenization, characterized in that as a mill, it contains a vibratory-wave vertical multi-chamber mill with an amplitude of the working body of 1-6 mm and a rotation frequency of 1400-2000 rpm, and as a device for additional On grinding and homogenizing a mixture of particles of coal and water, it contains a vibration-wave torus mixer-homogenizer with amplitudes of a vertical working body of 1-4 mm and a horizontal of 1-6 mm.  2. Installation according to claim 1, characterized in that it contains a mill with a mass of grinding media up to 1500 kg and a diameter of 15-50 mm.  3. Installation according to claims 1 and 2, characterized in that it contains a mixer-homogenizer with a mass of grinding media up to 2000 kg and a diameter of 10-40 mm.