SU1731280A1 - Installation for manufacturing limestone meal - Google Patents

Abstract

The invention relates to installations for the production of lime powder. Purpose - improving reliability and efficiency. The installation comprises a shaft 3 with a T-shaped partition 5, a perforated grill 10, an overload node 11, an air flow distributor 19, an air feed duct 18, a transport device and hammer crusher 13 Supply of the installation with a L-shaped partition, overloading unit, flow distributor and transforming device ensures uniform loading of the hammer crusher with dried material and obviates overgrinding finished product that improves the reliability and efficiency of the installation work 1 yl.

Description

The invention relates to installations for the production of limestone flour and can be applied in the agricultural, building and other industries.

The goal is to increase the reliability and efficiency of work.

The drawing shows the installation diagram.

It consists of a receiving bunker 1, under which is placed a feeder 2, a shaft 3 with a material loading unit 4, a partition 5, a flow channel 6 formed by a partition wall and a wall of the mine diverting pipe 7 connecting the upper part of the mine with an air dust removal unit 8 fluidized bed reactor 9 with perforated grid 10, material handling unit 11 and air distribution box 12 The installation also contains a hammer mill 13 with an inlet 14 and a grate 15 a crushed material recycling unit 16 with a flow-through pipe 17 for supplying it to the mine, an air supply duct 18 with a distributor 19, for example, in the form of triangular profiles, installed in a cascade descending from the inlet side oh /. of the hardening agent, a material transport device 20 to the warehouse of finished products.

The installation works as follows. The carbonate feedstock from the hopper 1 is fed by the feeder 2 through the material loading unit 4 in the required amount to the upper perforated end of the partition 5, which separates particles over-10 (20) mm in size and feeds them through the overflow channel 6 and the inlet 14 crusher 13. The crushed material from the crusher 13 through the grate 15 and the node

16 is supplied through a return pipe

17c reactor 9. Under the action of a stream of air entering through a duct 18 uniformly dispersed over the cross section of the duct 12 by means of a distributor 19 and leaving the openings of the lattice 10, a fluidized bed of material is formed in the reactor 9. In mine 3 and reactor 9, the particles of the material are treated with air, with partial removal of surface moisture in the warm season and freezing in the winter, as well as separation of limestone flour with a particle size of up to 1 mm. The dust-gas flow through the exhaust pipe 7 is directed to the air dedusting unit 8, and the captured lime flour by the device 21 is fed to the finished product warehouse. Larger

the fraction left with on the grate 10 is fed for regrinding to the crusher 13 by means of the overloading unit 11 and the transporting device 20.

If the bending angle of a partition with a perforated end is accepted to be less than 150 °, then when wet material is fed to it, the latter will lie on it, which will lead to disruption of heat and mass transfer processes and unjustified waste of heat to produce the finished product. In the event that the bending angle of the partition is taken to be larger than 160 °, the material loaded at the specified end, together with the fine fraction, will generally be poured through the overflow channel, falling into the hammer mill. This will lead to unnecessary energy consumption for crushing the material and, consequently, to

reduction in the quality of the finished product and installation performance.

The presence in the installation of a flow distributor in the form of triangular prisms, fixed by a cascade descending from the air inlet side, creates conditions for its turbulization, due to which the material moving by the transporting device is effectively dried. Thus, the work of the distributor in

the combination with the reloading unit and the transporting device allows the hammer crusher to be uniformly loaded with the dried material, ensuring its operation in the optimal mode,

thereby increasing the reliability of the installation as a whole while simultaneously intensifying the process of heat and mass transfer, which increases the efficiency of work.

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Claims (1)

Invention Formula A plant for the production of limestone flour, containing a perforated grid pit, a hammer mill, material loading and unloading units, an air supply gas duct and a dedusting unit, characterized in that, in order to increase reliability and efficiency of operation, the installation is equipped with a partition L-shaped with an inflection angle of 150-160 ° with a flow distributor, an overload unit and a transporting device, the upper end of the partition being perforated and connected to the unit downloads; and the lower one with the inlet pipe of a hammer mill, while the flow distributor is made in the form of triangular prisms fixed in the gas duct by a cascade descending from the air inlet side, and the overload unit is located at the vanishing point material from the lattice, and it is transported with an overloading unit, and the other with an inlet ruler device at one end is connected by a hammer mill pipe.