SU1434225A1 - Unloading end of rotary furnace - Google Patents

Abstract

The invention relates to the design of the discharge end of rotary kilns and can be used in refractory and. construction sites for burning lumpy materials, such as dolomite or limestone, and other industries that use rotary kilns to heat the bulk materials. The purpose of the invention is to increase the operational reliability, cost effectiveness and durability of the lining. 8 1B ym fffy) -JJ lJ JirT ri nr7777 71 / p7 Y; - -A 5 This retaining washer 7, in contact with the end plates 1 connected to the lined furnace body 2, is made of a trough-shaped profile with grooves 8, 9 in the end walls from the inner surface of the end plates. By making the rear flanges of the end plates with a height equal to 1/2 the height of the retaining washer contacting with them, and installing Z-shaped steel plates 13 between the rear shelves of the end plates and the lining of the furnace body, the adhesion of the end plates and the first row of lining bricks is improved. In this case, as a result of retaining washers of the trough-shaped profile with grooves in the end walls from the inner surface of the end plates, effective cooling of the discharge end of the furnace with ambient air and its further use in the process of torch burning in the furnace is provided. 2 hp f-ly, 3 ill. (L 00 4ib 1C tC CL 17 IS 4 5 FIG.

Description

The invention relates to: the design and discharge end of rotary kilns and can be used in refractory and construction industries for burning lumpy materials, such as dolomite or limestone, and other industries that use rotary kilns for heat treatment of bulk materials,

: The aim of the invention is to increase the operational reliability, economy and durability of the lining.

Fig. 1 shows the discharge head with the discharge end of the rotary knob run, longitudinal section j on the ball. 2 — node I in FIG. one; in FIG. 3, the A-A sentence in FIG. 2

I The unloading end of the rotating junction box 1 contains end plates 1, connected with the lined body 2 through the fastening elements IB in the form of rods 3 with elastic elements And nuts and 5, the cylindrical shell 6 covers the furnace 2 with a gap. The retaining washer 7, which is in contact with the LA, with end plates, 1 j plates, is made of a torsional profile with grooves 8, in the end walls from the inner surface of the end plates. To the mountaineer of the furnace body 2, the ring 10 is rigidly attached with the help of bolts 11. b. The furnace body 2 is evenly spaced with holes 12 for air flow. The end plates 1 are made with the height of the rear shelves equal to ll / 2 the height of the retaining washers in contact with them, with the location of the SM under the rear shelves of the end plates of the refractory lining junction,

Z-shaped steel plates 13 |) are placed between the rear panels, face plates 1 and lining 14 of the furnace body 2. The shell b is fixed at one end with a rigid end on the ring 10, and the other end loosely located on the protrusions of the longitudinal ribs 15 rigidly attached to the body 2 of the plug and the ring 10, to ensure reliable attachment of the ring 16 through the holes that pass t bar 3, provides kerchiefs 17.

The front end of the discharge kiln of the rotary kiln is located in the discharge head 18, the tightness of which is sealed.

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The discharge end of the rotary kiln operates as follows.

When mounting the discharge end, prior to laying the lining with nuts 5, elastic elements 4, such as cup springs, are clamped to the required force to press the end plates 1 to the lining. Z-shaped plates 13c are placed between the lining bricks of the first row and end plates. thickness, providing a calculated circular gap a between the rear end wall of the retaining washer 7 - and end plates 1, a circular gap b between the front wall of the retaining washer 7 and the plates 1 in this case remains minimal,

At the moment of heating of the rotary kiln with the appearance of compressive forces on the side of the lining, the end plates 1, overcoming the force of the elastic elements 4, are pressed all the way to the rear end wall of the retaining washer 7, At the moment of full heating of the lining the circular gap between the rear wall of the retaining washer 7 and the end plates 1 remain minimal, and the circular gap b between the front wall of the retaining washer 7 and the plates 1 becomes maximum, allowing the passage of cooling air and increasing the efficiency of cooling the end faces. lit 1.

An ambient air is used to cool the discharge end of a rotary kiln heated by flue gases from a cooler with a temperature of 800-850 ° C. Since in the discharge head 18 a vacuum is maintained within 2 to 4 mm of water. This way, through the openings 12 and the grooves 8 and 9 of the retaining washer 7, the rotating furnace air is poured into the discharge head 18. As it progresses, the air heats up, simultaneously cooling the retaining washer 7, the bolts 11, the entire inner surface of the end plates 1 and the outer surface of the discharge end of the rotary kiln.

Exhaust air at the entrance to the discharge head 18 with a temperature of 200-300 ° C with the exhaust gases enters the rotary kiln.

The presence of annular gaps a and b between the end walls of the retaining washer 7 and the walls of the end plates: plates.

1 provides uniform cooling of all component parts of the discharge end. In this case, the cooling air is fully used to support the combustion in the furnace, reducing the flow of cold air supplied by force with the help of blower fans.

The use of air developed and additionally heated by hot gases reduces fuel consumption and ensures the stability of the mixture in the burning zone of the rotary kiln.

When leaving the kiln, the burning material is blown with exhaust air with a temperature of 200-300 s and, partially lost to heat, enters the refrigerator where it continues to cool.

The disassembling of the internal end of the rotary kiln with Z-shaped plates and the height of the rear walls of the end plates equal to 1/2 the height of the retaining washer shelves in contact with them leads to an increase in the adhesion reliability of the end plates and the first row of lining bricks. At the same time, the ambient air is used for uniform cooling of the discharge end, with its further use in the process of burning the torch in the furnace, which reduces the dust content of the workplace, reduces the cost of manufacturing and installation

means for trapping exhaust air and its disposal.

Claims (3)

1. The unloading end of the rotary kiln, which contains end plates connected to the lined furnace body by means of fasteners, a cylindrical shell, covering the housing with a gap, and a retaining washer in contact with the end plates, in order to improve operational reliability, efficiency and durability of the lining, retaining washer is made of a trough-shaped profile with grooves in the end walls from the inner surface of the end plates. 2. The discharge end according to claim 1, characterized in that the end plates are made with the height of the rear shelves equal to 1/2 the height of the retaining washer shelves in contact with them, with the protrusion of the protrusion of the shell refractory lining under the rear shelves. 3. The unloading end on PP, 1 and 2, different in that. that it is equipped with Z-shaped steel plates placed between the rear shelves of the end plates and the lining of the case. P , 9ag.1 13