CS217311B1 - Isolation wall or seiling of the thermal aggregate - Google Patents

Description

The invention relates to the material and construction of furnace linings based on the use of fibrous materials.

At present, the lining of thermal aggregates is mainly made of classic refractory and insulating materials of shape and grain. Recently, some of the furnace construction elements have replaced these classical materials entirely with fibrous materials. One of the basic design features of these refractory fiber insulation is the necessity of anchoring the fibrous materials to the furnace jacket, for example. Different anchors of different materials are used, including different methods of their protection against heat. The most widely used method of anchoring is by means of heat-resistant steel anchor mandrels, passing through the entire thickness of the insulation, to which the heat-resistant steel anchor plates are fastened to temperatures up to 1100 ° C and ceramic anchor heads for temperatures above 1100 ° C. the direct heat of the furnace atmosphere.

These disadvantages of the existing walls or ceilings of the thermal aggregates are eliminated by the structure according to the invention, which consists in the fact that lamellas of inorganic fibers arranged in a field are adhered to the rigid plate, where in the adjacent fields there is a direction. longitudinal orientation of the slats perpendicular to each other.

This arrangement shifts the anchors from the hot face of the furnace to the inside of the insulation, where they are less stressed by the temperature and furnace atmosphere, making it possible to use anchors of less resistant

217 311

217 311 and therefore cheaper material while extending their service life.

The design of the inner layer of lamellas of inorganic fibers increases the mechanical strength of the surface of the insulation relative to the flat-laid products and at the same time increases the resistance to the flue gas flow, which allows the use of this type of insulation in several types of thermal aggregates. Hardened layers of refractory putty increase overall insulation of the insulation. Shortening the anchors not only saves the anchoring material, but also reduces the heat loss of the insulation by guiding the anchors and facilitates repairs to the inner surface layer of the thermal aggregate

An exemplary embodiment of an insulating wall or ceiling of a heat exchanger according to the invention is shown in the accompanying drawing, in which Fig. 1 shows a view of the top face of the insulation and Fig. 2 shows a cross section of the insulation.

Anchoring mandrels 4 are fastened to the sheet metal shell of the furnace 1, onto which the sheets of felt or mats of inorganic fibers are mounted. Further, rigid plates J of calcium silicate or inorganic fibers are mounted on the anchor darkness. The rigid plates are anchored by anchoring plates 6 fixed to the ends of the anchoring pins 4.

Slats 6 of inorganic fibers are then bonded to the rigid plates with a refractory putty. In order to reduce the joints between the slats resulting from continuous long-distance heat changes, the slats 6 are assembled into square fields where the amsr longitudinal orientation of the slats of two adjacent fields is perpendicular to each other.

The layer thicknesses of the individual materials must be dimensioned depending on the heat resistance and thermal conductivity of the materials used and on the operating temperature of the furnace.

Claims (1)

Insulating wall or ceiling of a heat aggregate to which a rigid calcium silicate or inorganic fiber plate is attached by means of mandrels and plates, characterized in that the rigid lamellas (6) arranged in the field are bonded to the solid (4), wherein in adjacent fields the direction of the longitudinal orientation of the slats (6) is perpendicular to each other.