SU1409809A1 - Rotary furnace filter-preheater - Google Patents

Abstract

The invention can be used in the construction materials and non-ferrous metallurgy to increase the efficiency of heat exchange in rotary kilns to increase their productivity by reducing pulverization. The filter heater co-keeps the arcuate segments 2 embedded in the charging end of the rotary kiln 1, which are used to fasten the chains 3 and mounted on the supports 4 in several rows along the length of the kiln 1. The segments 2 are mounted with a gap of 5 and form several concentric circles of different diameters. A part of the chains with 3 ends is attached to the segments of 2 different rows, and a part with both ends to the furnace body 1. 2 Il. but

Description

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The invention relates to the technique of raw materials for the wet process: Cement production and can be used in the building industry: Body materials and non-ferrous metallurgy during calcining of alumina.

The aim of the invention is to increase the heat exchange efficiency and increase the productivity of the furnace by reducing the pressure.

Fig. 1 shows the boot | End of the rotary kiln; longitudinal section; Fig 2 is the same section,: The rotary kiln filter heater contains attached to the body of the furnace 1 in it. In the boot part I, arcuate segments 2 serving as dp for fastening chains 3 and mounted on supports 4 in several rows along the length of furnace 1. To eliminate the 1 effect of thermal deformations, segment 2 is mounted with a gap 5 and {form several concentric circles coaxially with furnace 1 dia- {m,

{Chains 3 have different lengths and n {sesheny with different sagging, with: this part of the chains is fixed at both ends to the furnace body Ij and the second part - to segments 2 of the adjacent rows (or through p d), while both parts of the chains 3 are hung with a shift in dpine and around the circumference of the furnace 1 or around the circumference of the segments 2 in the direction of rotation of the furnace 1.

Filter sludge heater works as follows,

The sludge is fed through the pipe to the inner surface of the furnace body 1 and, moving in its lower part, enters the filter-preheater, where the sludge intersects with the chain 3 suspended from the whole depth and width of the stream. on segments 2, chains 3, rotating with furnace body I, then rise. into the space above the sludge, filled with waste hot gases that give up all the heat to the chain 3, uniformly distributed in the space above the shaft, and the sludge adhering to the chains 3, the heated chains 3 are again lowered into the sludge, each to its depth, and give up their heat to this particular layer of sludge,

As a result, the heat flux occurs uniformly over the entire cross section of the furnace I and over the entire depth of the sludge layer, more

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full and intensive use of heat from the exhaust gases, uniform thermal preparation of the sludge, which, with further advancement through the furnace and drying, creates conditions for its uniform granulation and reduction of dust generation.

In addition, the uniform distribution of the chains 3 in the cross sections of the furnace 1 at the installation site suggests the MW filter preheater to reduce the pyleunos from the furnace 1, since in any cross section along the length of the filter heating the stream of hot dusty gases washes away the chains 3 moistened with sludge, to which the dust particles contained in the gases adhere. Then, when lowering the chains 3 to the lower position, the layer of heated dust is washed off with a stream of sludge, giving it its heat. In this way, not only the heat is saved, but also the productivity of the furnace is increased by returning dust to production.

The proposed filter design according to the preheater due to the uniform distribution of the chains 3 over the entire cross section of the furnace 1 and the possibility of adjusting the density of their suspension will allow on one side, due to the uniform contact of the entire mass of the chains 3 sequentially with the entire mass of sludge and with the whole mass of hot waste gases to improve the heat transfer in the furnace 1; on the other hand, to reduce dust and dust from the furnace 1 due to the elimination of spraying and overflow of sludge into the dust chamber, as well as more complete trapping of dust with chains 3 wetted with sludge, which evenly overlap the cross section of the furnace U

In addition, the proposed filter preheater also makes it possible to reduce the consumption of electricity consumed by the engine of the exhauster,

Claims (1)

Invention Formula The rotary kiln filter heater contains chains and their fasteners embedded in the kiln feed ring, characterized in that, in order to increase the efficiency of heat exchange, to increase the kiln performance by reducing pshcheunos, the fasteners of the chains are made in the form of arcuate segmented 31409809. parts mounted with coaxial furnaces are somewhat concentrated — both ends are attached to segmental circles, while the segments are of different rows, and some of them are set up in several rows ends to the furnace body. J. 222 h AND UHH XXXX f7 and I zz ZZ2 / Imbmh G- | / / f AND / t L X zz / / xtZZ eleven   Xx