SU1099085A1 - Peat briquetting method - Google Patents

Abstract

METHOD FOR BRIQUETTING PEAT, which involves transporting the torfyryr to the dryer bin, feeding it with flue DUMOV1L4I gases into the dryer, crushing, drying and moving with air flow and flue gas into dust precipitators, feeding into the matrix channel of the press and pressing, in order for the purpose of intensifying the process of intensification. , drying is carried out in two stages, with the first stage being carried out before being fed into the dryer by ejecting peat in the form of a torch at a speed of 11-14 m / s.

Description

х / У /// /// //// //

WITH

ABOUT

00

AP / I1 The invention relates to peat industry, in particular, to the production of fuel briquettes, and can be used in a peat briquetting production line. A method of peat briquetting is known, which includes feeding peat into a screen, sieving it, transporting it to a dryer bunker, drying it with flue gases. in pipe, dryers, and briquetting. С 1 1 The disadvantage of this method of briquetting is the low maximum moisture content of peat (up to 70%) taken by the dryer due to insufficiently high temperature Shilny agent 500-1000С. The closest to the invention to the technical essence is the method of briquetting peat, including transporting peat to the drying bin, feeding it with night-time flue gases into the dryer, crushing, drying and moving with air and flue gas to the sediment, feeding press into the matrix. and pressing 23 The disadvantage of the known method of briquetting up is the low permissible maximum moisture content of peat (up to 7-02), accepted by drying, which is due to the insufficiently high temperature of the drying agent 500-1000 s. The aim of the invention is to intensify the peat briquetting process. The goal is achieved by the method of peat briquetting, which involves transporting raw peat to the dryer bunker, supplying it with flue gases to the dryer, crushing, drying and moving with air and flue gas flow, feeding into the matrix channel of the press and pressing, drying s two stages, the first stage being carried out before feeding into the dryer by throwing peat in the form of a torch with a speed of 11-14 m / s. The drawing shows the installation for: implement the method. The milled peat, for example, from a top pine-cotton grass deposit, humidity 76% and 45% decomposition, is transported by a scraper transport rum 1 into a silo of peat 2, the bottom of which is the surface of the rolls 3 and 4 having counter rotation with 5 angular speed 1600 -2000 rpm and more. At the same time, the peat on the milling crumb, located near the surface of the rolls 3 and 4, by friction is carried into the inter-roll zone along the entire path of movement in this zone is subjected to compression by a force of up to 39 g / mm, the peat particles approach to the effect of interconnection, the air adsorbed on due to the speed of the process, their surfaces are partially outwardly removed; a large part of it, left in the pores and on the surface, is a shock absorber and degrades the packaging of peat in the grooves of the roll 4, the cross-sectional sizes of which h are 4x8 to 5 g. close to the center line of the rolls 3 and 4, the milling crumb 5 being in the inter-roll zonze, the active forces move into the grooves of the roll 4, increasing the weight of the peat there and compacting it. Having reached the center line, the peat mass is ejected from the grooves of the roll 4 in the form of a torch by centrifugal force, the value of which is significantly greater than the friction forces that hold the peat mass in the groove. At the same time, peat particles, moving at a high speed of 11–14 m / h or more, lose 2–6% or more of their humidity due to intense evaporation. When the rollers 3 and 4 rotate at a speed of less than 1600 rpm, the conditions for ejection of peat from the ase in the form of a torch are not provided. This achieves the evaporation rate, which means the first stage of peat drying. Moreover, the evaporation rate is increased by increasing the rate of evaporation of the liquid by telling the particles a greater speed of movement in air of 11-14 m / s and more. In addition, the evaporation rate is increased by increasing the rate of evaporation of the liquid by increasing the area of its surface. An increase in the surface density of the liquid is achieved by dispersing the peat mass. The dispersion changes the fractional composition of peat. The number of large fractions becomes smaller, and the number of small fractions increases. Due to this, the surface area of each individual particle becomes larger, which means that the surface area of the liquid increases. The resulting vapors, together with air, are sucked into the atmosphere in the direction of arrow A. The 4 peat particles ejected from the grooves of the roll enter the surface of the screw feeder l 5 (which is located at a distance of 0.5-3 m from the center of the rolls 3 and 4, located in the dryer hopper is vertically above it), and this races their position also increases the evaporation rate due to the longer movement of particles in the space between the rollers and the screw, the moisture content of the end face decreases from 76 to 70%, which is fed through a sleeve washed inside by flue gases where peat with a moisture content of 70% is in contact with a stream of hot flue gases (having a temperature of 500-1000 ° C and a movement speed of 1517 m / s) and is partially dried, while up to 35% of moisture is evaporated into the pipe 6 of the dryer 7. Then the particles flow air and flue gas continue their movement through the pipe 6 of the dryer 7, in the lower part of which the temperature of the flue gases is within 74.5-75 ° C, and in the upper part 70-75 ° C, depending on the particle size and humidity, the behavior them in the tube of the dryer 7 will be different: fine dried ones without dried up are transferred from shilk 7 by flow of gas gases, and larger and less dried ones will gush and dry until the drying tube 7 is removed from the shaft (at the same time up to 5% of all moisture evaporates) through pipeline 8 to the grinding fan 9, wherein it is also ground and dried. Peat particles are then fed through pipe 10 to precipitated cyclones 11 and 12, in which, due to inertial forces, dust is separated from gases. The settled particles enter the dry peat bunker 13; and the dust that has not been settled by gases is removed by pipeline 14 to the cleaning cyclone 15, in which dust is separated from gases. Due to this, the dust settled through the cyc line (Lona 15 enters the dry peat bunker 13 and the gas enters the atmosphere. From the dry peat bunker 13, peat dried to 14–15% moisture is fed through the loading part into the matrix channel 16 of the press, where briquette. Formed during pressing, the dust from the surrounding medium enters the dedustment cyclone 17. The precipitated particles are directed through the cyclone pipe 17 to the dry peat hopper 13 and the air through the cyclone 17 pipe from the depletion fan 18 is the atmosphere. The present invention will increase to 6% maximum permissible moisture peat fed into the dryer by the introduction of additional operations preliminary drying thereof, significantly reduce the cost of the preform by reducing the time required to bring the feedstock to the operational condition.

Claims (1)

METHOD FOR PEAT BRIQUETTING, which includes transporting peat in the dryer hopper, supplying it with flue gas to the dryer, crushing, drying and moving it with air and flue gas in a dust separator, feeding it into the matrix channel of the press and pressing, characterized in that, in order to intensify the briquetting process drying is carried out in two stages, and the first stage is carried out before feeding into the dryer by ejecting peat in the form of a torch at a speed of 11-14 m / s.