RU1805273C - Lime producing installation - Google Patents

Abstract

SUMMARY OF THE INVENTION: A lime production plant includes a feed hopper, a screen, a rotary drum, a feed preheater, a fluidized bed furnace, a conveying system, a refrigerator, and cyclones. The furnace is equipped with an air heater and a multi-channel shaft furnace, the inlet of which is connected to the outlet of the fluidized-bed furnace and the outlet is connected to the inlet of the air heater, the outlet of the air heater being connected through a cyclone and a raw material heater to the input of the rotating drum, 1 silt.

Description

The invention relates to equipment used in the manufacture of building materials, in particular for calcining lime of highly moist and non-standard waste carbonate raw materials.

The purpose of the invention is to increase production efficiency and expand the technological capabilities of the installation through the use of highly humidified and substandard waste carbonate raw materials.

The drawing schematically shows a plant for the production of lime.

The installation comprises a hopper 1, a feeder 2, belt conveyors 3, 4, a rotating drum 5, cyclones 6,7,8, an electrostatic precipitator 9, a smoke exhauster 10, a chimney 11, conveyors with submerged scrapers (KPS) 12, 13, 14, 15, screen 16, warehouses 17, 18, 19, raw material heater 20, fluidized bed furnace (CS) 21, burner devices 22, refrigerator 23

fluidized bed (CS), fan 24, multi-channel shaft furnace 25, air heater 26, blower 27, air pump 28, hammer mill 29 and conveying device 30.

Installation works as follows.

Waste or crushed carbonate raw materials from the feed hopper 1 in the required quantity by the feeder 2 are dispensed onto the conveyor belt 3, which feeds the feed into the rotary drum 5 for partial drying. From the drum, the dried raw material is fed by a conveyor with submerged scrapers 13 to the screen 16, The supernatant fraction from it in the form of crushed stone, which is the secondary finished product, the belt conveyor 4 is sent to the warehouse 17 or to the hammer mill 29 for regrinding. Feed fraction and crushed material after hammer crusher, conveyor feed

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by the grinding device 30, by means of the CPS 14 is loaded into the heater 20, in which the raw material is dried and heated. In this case, coarse fractions are sent to the fluidized bed furnace 21 for calcination to obtain fine-grained lime, and the fine fractions are carried out by gas flow into the drying drum 5 and then to the gas purification system (cyclone 6 and electrostatic precipitator 9), where they are also captured using KPS 12 and the air pump 28 are transferred to the warehouse 18 in the form of lime flour (secondary finished product) or to the KS 21 kiln for suspension in suspension to obtain fine lime.

The fine-grained lime is cooled in the refrigerator KC 23 by a stream of cold air pumped by a fan 24.

Pyleunos lime from the refrigerator KS is captured in cyclone 7 and, together with chilled fine-grained lime, is poured on KPS 15.

Hot air after the cyclone is directed to the burner 22 of the multi-channel shaft furnace 25 for burning fuel, and its excess is discharged into the gas duct in front of the air heater 26, into which air is supplied from the blower 27.

Partially fired fine fractions of the feed are removed by high-temperature gases from the fluidized-bed furnace 21 to the multi-channel shaft furnace 25 for their final calcining under calcined gas suspension.

The gas stream, together with the finely divided lime from the shaft furnace, is directed through the gas duct to the air heater 26, where it is heated to the temperature necessary for burning fuel in the burner device 22 of the fluidized bed furnace 21.

Further, the gas stream together with finely divided lime enters the cyclone 8 through the gas duct, in which it is captured. Then lime is poured into KPS 15, and gas

the gas stream is directed to a heater 20 for heating and then to a rotary drum 5 for partial drying of the feed.

Dust-free gases from the smoke exhauster 10 are emitted into the atmosphere through the chimney 11.

Fine-dispersed lime precipitated in cyclones 7 and 8 together with fine-grained lime after a fluidized bed refrigerator

KPS 15 is transported to warehouse 19.

Using the invention, it will be possible to achieve an increase in production efficiency due to the complete utilization of the heat of the exhaust gases and to expand the technological capabilities of the installation, which contribute to the production of high-quality lime from substandard waste carbonate raw materials.

Claims (1)

The claims A lime production plant including a feed hopper, a screen, a rotary drum, a feed preheater, a fluidized bed furnace, a conveying system, a refrigerator, and cyclones the fact that, in order to increase production efficiency and expand the technological capabilities of the installation through the use of highly humidified and substandard carbonate waste raw materials, it is equipped with a multi-channel shaft furnace and an air heater, with a fluidized bed furnace, a multi-channel shaft furnace, an air heater, a cyclone, a raw material heater and a rotary the drum is connected in series with each other by flues. 22 25