SU1416821A1 - Method of drying loose materials - Google Patents

Abstract

Invention m. used in chemical, cement industry. The purpose of the invention is to improve the economy. The raw material is supplied by the metering unit to the drying chamber, where it is dried in a fluidized bed with a gaseous drying agent coming from the furnace 2. The drying process parameters are cyclically changed. As variable parameters of the drying process, the flow rate of the wet material, the flow rate and the temperature of the drying agent are chosen, the flow rate of the wet material and the drying agent are changed in antiphase with respect to the change in temperature. In this case, the flow rate of the drying agent is changed directly according to the flow rate of the wet material, and t-ru of the drying agent is inversely proportional to the flow rate of the latter. 2 Il. o &

Description

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The invention relates to a drying technique and can be used in the chemical, cement, and other industrial sectors.

A: The purpose of the invention is to increase eco-; nominal

; FIG. 1 is a schematic diagram of an installation implementing the method proposed in FIG. 2 - 1 diagram of the change in the consumption of wet material (Q) and drying agent (V), temperature of the drying agent (T) in time (.

The installation contains a drying chamber 1 connected to the furnace 2, corona, b 3 for supplying atmospheric air for dilution of flue gases, metering device 4, gas distribution grid 5, burglar grille b, control of the unit operation is effected by time relay 7 through the actuator 8 on the gate 9 and the drive 10 of the dispenser 4.

The installation works as follows.

The initial wet material is supplied with the dispenser 4 to the drying chamber j where it is dried in a fluidized bed with a gaseous drying agent (black gases) flowing through the gas distribution grid 5 from the furnace 2 "The required temperature of the smoke gases is obtained by diluting them with atmospheric air, I enter SCH4 through the box 3.

Exhaust flue gases pass through the grate 6, are cleaned, dust from the dried material is then emitted through the flue to the atmosphere, and the dry material is discharged from the drying chamber 1 through the discharge device. During the dry process, according to a predetermined time relay program 7 through actuators 8 and 10 cyclically change the parameters of the drying process: the flow rate of wet material, the flow rate of the drying agent and the temperature of the drying agent

For example, at the moment of time (FIG. 2), with the help of the dispenser 4, the consumption of a wet material with Q, is reduced. To Rg supplied to the dryer

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1, and at the same time, by partially covering the gate 9, the supply of atmospheric air to the dilution of flue gases is reduced, which leads to a corresponding reduction in the consumption of the drying agent from V; to V supplied through the gas distribution system, 10 to the drying chamber 1 L The temperature of the drying agent is from T to T (at constant fuel consumption).

Over a period of time, an intensive warming up of the layer of drying of 5 MOH material S sintering of small particles into granules occurs, which helps to reduce the dust loss with the spent drying agent. Then, by means of the dispenser 4, the supply of wet material to Q is increased, and at the same time, by opening gate, the flow of atmospheric air and, accordingly, the flow rate of the drying agent to V, is increased, which leads to a decrease in its temperature to T. After a certain in this mode, the cycle is repeated in the described sequence, while the flow rate of the drying agent is directly proportional to the flow rate of the wet material, and the temperature of the drying agent is inversely proportional to the flow rate of the last.

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Claims (1)

Invention Formula five The method of drying loose materials by supplying a wet material and a drying agent. And cyclically changing the parameters of the drying process, characterized in that, in order to increase efficiency, the flow rate of the wet material, the flow rate and the drying temperature are chosen as the cyclically variable parameters of the drying process. the agent, the flow rate of the wet material and the drying agent are changed in antiphase with respect to the temperature change, while the flow rate of the drying agent is directly proportional to the flow rate of the wet material rial, and the temperature of the drying agent is inversely proportional to the consumption of the latter. Ti FIG. 2