SU1139720A1 - Conveyer line for producing of foam materials - Google Patents

Abstract

1. CONVEYOR LINE FOR PRODUCTION OF FOAM MATERIALS containing a foam generator: a continuous mesh supported on rollers and bearing on the substrate, a drying unit and a drive, characterized in that y. in order to improve its operation, to improve the conditions of operation and quality of the material by continuously foaming the dispersion, the foam generator is made of several successively arranged chambers, increasing in volume from the next stage, followed by horizontally placed impellers in their lower part, and dispensers and boot loops in the upper part vertical baffles for the direction of dispersion from the previous chamber to the next immediately below the impeller, drying unit It is in the form zlektroinduktsionnyhpechey whose walls are made of materials with different physical properties, prichemobmotki inductors formed sektsionnymis raznm number of windings in the sections and between the windings of the sections in the chamber walls are made of steam-otverstiyas slotted nozzles. (L 2. Conveyor line under item 1, it is noted that, in order to avoid spreading of the Penomessa mesh limits, a former is installed in front of it, equipped with support rollers with flanges to give the substrate a trough-like shape: o; VI. 3. Conveyor line along Clause 1, stating that, in order to ensure roasting of the dried material, the last section of the drying unit is equipped with an autonomous drive and a continuous grid.

Description

111 The invention relates to the building materials industry, in particular, to installations for the production of foamed thermal insulation materials, for example, based on asbestos and vermiculite, and can be applied in enterprises whose organization is intended to produce extremely light non-combustible thermal insulation materials for shipbuilding, aircraft manufacturing, energy, cryogenic technology. A known conveyor belt for a heating installation comprising a mesh belt provided with a coating made, for example, in the form of paper with heat-resistant coating ij. However, these conveyor lines do not contain the elements necessary for the production of foamed thermal insulation materials. Closest to the proposed technical essence and the achieved effect is the production line of sheet foamed asbestos, intended for the release of foamed materials of fibrous structure. The line contains foam generators, a continuous grid supported on rollers and a carrier on itself, a drying unit in which the heaters are thermal electric heaters (heating elements) equipped with Czi reflectors. The disadvantages of such a conveyor line are the periodic foaming cycle and the trauma of the foam mass during its supply and distribution to the conveyor grid, unreliable operation of heating elements in round-the-clock operation with continuous evaporation of moisture from the foam mass, uneven heating of the foam mass (directly under the heating elements, the temperature is higher than in space between them), the efficiency of the reflectors is low, the working surface of which is covered with evaporation and drinking. The supply of foam mass to the grid in known conveyor lines for foam production is carried out discretely from two foam generators, by means of two pumps operating alternately, and for distributing the foam mass to the grid width, storage units equipped with a feeder and leveling device are used. The longitudinal side plates used to prevent the spread of the foam mass out of the grid do not provide a satisfactory seal between the substrate and the bar, which often leads to leakage of the foam and sticking to the sides of the conveyor. The purpose of the invention is to increase the reliability of the conveyor line, improve its operating conditions and the quality of the material by continuously foaming the dispersion. This goal is achieved by the fact that in a conveyor line for the production of foams, containing a foam generator, a continuous mesh supported on rollers and a carrier carrier, a drying unit and a drive, the foam generator is made of several successive chambers that increase in volume from the previous to the next. with horizontally disposed implants mounted in their lower part, ellera, and in the upper part with dispensers and loading hatches and with vertical partitions to direct dispersion from In the subsequent chamber directly below the impeller, the drying unit is made in the form of electric induction furnaces, the walls of which are made of materials with different electrophysical structures, and the windings of the inductors are sectioned with different numbers of turns in the sections, and between the sections of windings in the walls of the chambers are slotted openings with steam outlets. In addition, in order to avoid the spreading of the foam mass beyond the mesh, a former is installed in front of it, equipped with support rollers with flanges to give the substrate a trough-shaped shape. In order to ensure the burning of the dried material, the last section of the drying unit is equipped with an autonomous drive and a continuous mesh. FIG. 1 shows a conveyor line, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. figure 4 - section bb In fig. one; figure 5 - section GGD in FIG. 1. The conveyor line contains the foam generator 1, the conveyor 2, the molder 3 of the foam mass, induction tunnel furnace 4 and the induction furnace of the 31 furnace 5. The foam generator 1 consists of three chambers enclosed in one housing 6. At the bottom of each chamber there is an impeller 7, and in the upper part there are dispensers 8, which regulate the flow of foam mass from one chamber to another. In the upper lid of the foam generator body 1, there are hatches 9 through which additional components are supplied to chambers at different stages of foaming, for example, vermiculite, graphite, metal powders, wollastonite, basalt or kaolin fiber. The vertical partitions 10 provide the direction of the foam from one chamber to another directly under the impellers 7. The front chamber is equipped with a receiving funnel 11 with a vertical partition O that guides the dispersion under the impeller 7. The volume of the foam generator chambers increases from the previous to the next, respectively, the amount of in them penomassy. The width of the last chamber that penetrates into the conveyor grid is approximately equal to the width of the grid. The drive 12 of the impellers is performed from individual electric motors or from a single motor connected to the other impellers by a V-belt transmission. Conveyor. 2 comprises a net 13 supporting rollers 14 fitted with flanges, driving and driven drums 15 and 16, guide rollers 17, a drive with an adjustable electric motor 18, and also a system 19 for rolling and feeding 20 of the substrate 21, for example, from filter paper to which is attached trough-shaped form. The induction-drying furnace 4 consists of an oval-shaped chamber 22 welded from magnetically conductive steel on which the inductor 23 winding is mounted. An electrical insulation is laid between the windings and the walls of the chamber. The walls of the chamber 22 are made of metal with different electrophysical properties, and the winding of the inductor 23 is sectional with a different number of turns in the sections. Each drying oven has three sections, and the number of furnaces in the line is determined by the required duration, drying of the foam and the speed of the grid. Thus, for example, in an industrial conveyor line — it is provided for the installation of nine induction drying ovens for 4 kilns each 3 m long. The intensity of drying increases due to the supply of heated air into the chambers, for which the nozzles 24 are mounted at the loading edge of the first INDUCHON furnace, the discharge edge of the last furnace, and also between the furnaces and to remove from the chambers the formed vapors in the upper walls of the chambers between the electrical windings there are slotted holes with steam outlets 25. The ends of the electrical windings are output to a terminal box to which the industrial frequency voltage is applied. The induction furnace for firing the dried plates is different from the furnace for drying the foam mass by the parameters of the winding, since the firing temperature is required (250-300 s) significantly higher than the drying temperature (60-120 ° C). The kiln is equipped with an independent grid and a separate drive. Conveyor line works as follows. A dispersion containing, for example, asbestos, a wetting agent and a water repellent agent, continuously and evenly flows from the reactor to the receiving funnel 11 of the first chamber of the foam generator 1, in which a constant level of dispersion is maintained. Due to the vertical septum 10, the dispersion enters the impeller 7, during rotation of which the foaming begins. The resulting foam mass fills the volume of the first chamber and dispenser 8 is fed into the second chamber, where the foaming continues, then the foam mass is fed into the third chamber, and so on. Through the hatches 9, the necessary additional components are fed into the chamber during the foaming process. The amount of dispersion entering the foam generator is controlled by the dosing valve of the reactor, and the flow rate of the foam from one chamber to another and from the last chamber to the substrate of the conveyor grid is controlled by metering devices 8. Moving with the grid, the foam mass is dried in induction furnaces. Surviving steam is carried away from the furnaces by heated air. The dried material is cut into individual plates that are fed to the grid of the kiln. After firing, the finished gagats are stored.

J, 11397206

The application of the proposed conveyor belt and the quality of the line produced by mana allows one to increase the reliability by continuous foaming of the work, to improve the conditions of the dispersion life.

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Claims (3)

1. CONVEYOR LINE FOR PRODUCTION OF FOAM MATERIALS, containing a foam generator / continuous mesh supported by rollers and supporting a substrate, a drying unit and a drive, characterized in that, in order to increase the reliability of its operation, improve operating conditions and material quality by continuous foaming dispersion, the foam generator is made of several successively arranged chambers, increasing in volume from the previous to the next, with the impeller mounted horizontally in their lower part in the upper part - with dispensers and loading hatches and with vertical partitions for directing dispersion from the previous chamber to the next directly under the impeller, the drying unit is made in the form of electric induction furnaces, the walls of which are made of materials with different electrical properties, and the windings of the inductors are made sectional with a different number of turns in the sections, and between the sections of the windings in the walls of the chambers, slotted holes with steam outlet pipes are made. 2. The conveyor line according to claim 1, characterized in that, in order to avoid the spread of foam mass outside the grid, a former is installed in front of it, equipped with support rollers with flanges to give the substrate a trough-like shape. 3. The conveyor line according to claim 1, characterized in that, in order to ensure firing of the dried material, the last section of the drying unit is equipped with an independent drive and a continuous grid.