CS223314B1 - Method of thermal treating of the powderous raw material - Google Patents

Abstract

The invention relates to a heat treatment apparatus, especially calcination, preheated powdered raw materials for making simku. The device consists of two pre-heater branches (P1, P2), with a calculator (K1, K2), za followed by a sintering device (IR) with a cooler (CH) clinker. Preheated hot air is led from the clinker cooler (CH) to the calculators (K) as the combustion flue gas of • of the (R) sc 's device into the preheater (P1) or preheat (P1, P2). The pipe (3) of the calcined material connects one kaleinator (I <2) with piping (2) hot flue gas flowing into one or both preheaters (Pl. P2R and pipe (4) the calibrated internality is connected by a second kaleinator (Kl) with a sintering device (R). In the device according to the invention, calcined the raw material remains at the calcination temperature for a longer time, practically in the sintering device only sintering takes place.

Description

BACKGROUND OF THE INVENTION The present invention relates to a heat treatment apparatus, in particular to calcination, of preheated powdered raw material for the manufacture of a cigar simulator.

The apparatus consists of two branches of a preheater (P1, P2), with a calciner (K1, K2), followed by a sintering device (R) with a clinker cooler (CH). The preheated hot air is passed from the clinker cooler (CH) to the calculators (K) as combustion flue gas from the marl (R) sc '' to the preheater (P1) or preheater (P1, P2).

The calcine material pipe (3) connects one kaleinator (I <2) to the hot flue gas pipe (2) flowing into one or both of the preheaters (P1 P2R) and the pipe (4) of the tertiary ineteria connecting the other kaleinator (K1) to the sintering device. (R).

In the device according to the invention, the calcined feedstock remains for a longer time at the calcination temperature, whereby only the sintering takes place in the sintering device.

FIG

The invention relates to a method of heat treatment of a pulverulent raw material, in particular for the production of cement clinker, which is preheated and calcined in a preheating apparatus supplemented with a calcining apparatus and sintered in a subsequent sintering apparatus, for example to cement clinker.

Originally, the powdered raw material, mainly intended for the production of cement clinker, was fired in a rotary kiln, where both calcination of this material consuming thermal energy and sintering, which is no longer heat intensive, took place. During development, a preheater was installed in front of the rotary kiln, which preheated the introduced raw material with waste heat mainly from the rotary kiln. By further developing the production improvement, several preheaters were placed in front of the rotary kiln, so the preheater was divided into several branches, which proved to be advantageous. Here, too, the calcination had to be carried out in a rotary kiln, which made it too heavy. The individual preheaters were then terminated with a calciner, into which, for example, preheated air from the clinker cooler and other fuel were introduced, thereby providing a calcination temperature at which the preheated pulverulent feedstock could calculate and consume the necessary heat, thereby relieving the rotary kiln. However, the dwell time was short, the material was not properly calcined, and therefore, another calcining machine, a hot cyclone through which the flue gas coming from the sintering equipment passes, was added to the calciners and sintering equipment, mostly a rotary kiln. However, it has been shown that the pulverized raw material to be treated needs an even longer delay at calcination temperatures, so that only sintering can be carried out in the sintering plant, which is not temperature intensive, and thus either more material can be promoted or less. constructionally and operationally advantageous.

Both ways of holding the preheated pulverulent raw material in the calcination temperature as long as possible in order to make the necessary calcination as perfect as possible are sought.

These drawbacks are eliminated by a device according to the invention consisting of a two-branch preheater, each comprising a calciner-terminated preheater followed by a sintering device with a clinker cooler, with a preheated hot air conduit leading from the clinker cooler to the two calciners, with hot flue gas conduits leading from the sintering device. to a preheater or both preheaters, wherein the calcined material line connects one calciner to a flue gas duct leading to at least one of the two preheaters, wherein the calcined material line connects the other calciner to a sintering device.

With this arrangement of the heat treatment apparatus for the pulverulent feedstock, the material passed through the preheater and the calciner as well as the heat supply partially returns to one or both of the preheating and calcining devices, favorably affects the calcination mode and proceeds perfectly to the sintering device.

The device according to the invention will be explained in more detail by way of illustration, in which in FIG. 1 the hot flue gas duct opens into only one preheater and in FIG. 2 into both preheaters. Preheaters P1, P2 terminated by calculators ΚΙ, K2 form two branches of the total preheater. Further shown is a sintering device R, in our case a rotary kiln, terminated with a cooler CH of the finished clinker. The hot gas piping is indicated by solid lines and the calcined material piping by dashed lines, the arrows indicate the flow direction. Preheated hot air duct 1 goes from CH clinker cooler to both calculators ΚΙ, K2. The hot flue gas pipe 2 goes from the sintering device R to one or both preheaters P. The calcined material pipe 3 leads from one calciner K2 to the hot flue gas pipe 2 and the pipe 4 leads from the other calciners K to the inlet of the sintering device R.

The calcined material passed through the preheater P passes through a calcination temperature calciner K, from one of the calciners K2 this material is fed into the hot flue gas duct 2 and returns to one or both of the preheaters P1 and P2 of the calcinators ΚΙ, K2. temperature, and from the second calciners K1 is fed to the sintering device R, via a line

4. The calcined material also converts its heat capacity, which remains longer at high temperatures and the better its heat treatment takes place.

Perfectly calcinated material does not thermally burden the sintering device with finishing calcining, which may be smaller or can process a larger amount of material, which is both investment and operationally advantageous.

Claims (1)

SUBJECT Apparatus for the thermal treatment of pulverulent raw material, in particular for calcining pulverized cement clinker material, consisting of a two-branch preheater, each comprising a calciner-terminated preheater followed by a sintering device with a clinker cooler, with a preheated hot air duct leading from the clinker cooler to of both inventions of calciners, with a hot flue gas line leading from the sintering device to a preheater or preheaters, characterized in that the calcined material line (3j) connects one calciner (K2) with a flue gas line (2) leading to at least one of the preheaters (P1, P2j); wherein the calcined material line (4) connects the second calciner (K1J) to the sintering device (R1). 1 sheet of drawings Severography, n, p. Zvod 7, Most