SU1234378A1 - Method of cleaning mineral fibre and device for effecting same - Google Patents

Abstract

1, The method of cleaning mineral fiber by directing the plume to the reflecting screen, treating it with opposing and perpendicular air currents, removing the beads and sucking the cleaned mineral fibers from the ice. that, in order to increase the degree of purification and ensure the fractional homogeneity of the purified fiber, the blow-up flare is additionally twisted by air flows tangential to it, and the sucked-out blown is subjected to a suspended suspension classification by means of a differentiated vacuum suction top and bottom of the conveying flow, moreover, the latter is preliminarily subjected to an acute otduv with a stream of air with a pressure of 0.03-0.15 at. the board of the upper vacuum suction. . 1C (L with / ftuffffffe T Oir / MAMRM INS with 4: and Od 1 00

Description

2. A device for cleaning a mineral fiber containing a fiber former, a receiving chamber with air distribution ducts, one of which is mounted on the chamber wall, and the other in the bottom of the chamber, made in the form of a groove, enclosing a device for removing corules, connected to a receiving chamber with a transitional tunnel, a fiber deposition chamber, in the lower part of which a mesh conveyor with a vacuum suction system is installed, which is intended to

The invention relates to the production of heat-insulating construction materials and can be used in the manufacture of mineral fiber and products based on it.

There is a known method and device for cleaning mineral fiber from the beads by treating the blown noToKai "i blown air evacuated during the blowing process of the beads and sucking the cleaned cotton wool. According to the well-known technical solution: the crowns are captured in the annular cavity, which is located behind the fiber former at the entrance to the receiving chamber, made in the form of a diffuser. To prevent the fiber from settling to the bottom of the diffuser, the blow-up flare is influenced by directional airflows. In this case, the air flow is directed along the blow up plume. The cleared cotton wool is sucked into the fiber chamber, It).

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However, this technical solution does not

provides complete cleaning of the fiber from goats alca, since in the annular cavity located at the entrance to the diffuser, only the crowns flying along the periphery of the blowing plume are caught, and the axial part of the plume is flashing on the periphery of the mineral fiber. ) can be freely carried away into the fiber deposition chamber or fall out of

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increasing the degree of purification and providing fractional homogeneity of the purified fiber; it is equipped with an annular perforated duct mounted at the entrance to the receiving chamber concentrically to the fiber former, a system of air nozzles installed at the exit of the transition tunnel, and an additional vacuum conveyor system (Vacuum) in the upper part of the fiber deposition chamber, with the air nozzles facing the additional conveyor.

fuzore, thus worsening the aerodynamic mode of operation of the latter.

The closest in technical essence to the invention is a method and a device for cleaning mineral wool from Korolki by treating a reflective shield and torch with a feed towards and perpendicular to its axis of air flow at a speed of 3 m / s, evacuation of donuts and vacuum suction. purified fiber. According to this technical solution, the cleaning device comprises a fiber converter, a receiving chamber with air distribution ducts, one of which is mounted on the wall of the chamber, and the other in the bottom in the form of a groove covering the evacuation mechanism of the beads, and connected to the receiving chamber via a transition tunnel the lower part of which is mounted mesh forming conveyor with a vacuum suction system f 2. I, ..,.

Known technical solution not. provides complete separation of mineral fibers from coarse non-fibrous inclusions less than 0.5 mm in size, the problem of removal of which is particularly acute in the production of super-thin fibers. In addition, with a large angle of flare opening, entrainment into the chamber of the fiber-bearing denis and part of larger fractions is possible.

kings The known solution does not allow to organize the production of fiber with its separation by fractional composition.

The purpose of the invention is to increase the degree of purification and to ensure the fractional uniformity of the purified fiber.

This goal is achieved in that according to the method of purification of mineral fiber by directing the plume to the reflecting screen, treating it with counter and perpendicular air flows, removing corols and suction of the cleaned mineral fibers, the blowing torch is additionally twisted with air streams fed tangentially to it, and the fiber is subjected to Classification in a suspended state by a differentiated vacuum suction top and bottom of the transporting stream, the latter being of acute subjected puffing air flow pressure 0.05- 0.15 atm in the direction of the upper vacuum suction.

This goal is also achieved by the fact that a device for cleaning mineral fiber containing fiber-forming fiber, a receiving chamber with air distribution Jsopoids, one of which is mounted on the chamber wall, and the other in the bottom of the chamber made in the form of a groove, covering a device for removing the beads, connected to the receiving chamber by means of a transition tunnel, a chamber of a circular deposition, in the lower part of which a grid conveyor with the vacuum suction system is located, is provided with an annular perforated box The bomber, installed at the entrance to the receiving chamber, is concentrated in the center of the evaporating agent, with a system of air nozzles installed on. exit from the transition tunnel, and an additional mesh conveyor, made with a vacuum suction system and installed in the upper part of the fiber deposition chamber, with the air nozzles pointing towards the additional conveyor,

FIG. 1 shows a device for carrying out the method, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The proposed method is carried out as follows.

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The vertical flare of the extraction of mineral fiber production is directed onto the stationary reflecting screen located below and is simultaneously temporarily treated with three directional air flows, one of which is fed tangentially to the torch, the second is directed towards the bottom, the third is from the side, perpendicular to the axis of the torch . The air flow supplied tangentially twists the blow-up flare, thereby ensuring the separation of the fiber from the flakes, carrying it to the periphery of the flare. The counter-flow of air slows down the fiber, and the lateral flow ensures the reorientation of its flight path in the suction direction of the cleaned fiber. Flying at a speed of 24-63 m / s, the beads do not change their trajectory under the influence of the indicated air flow. Having a large supply of kinetic energy, they reach the bottom of the chamber and evacuate 1ps. The sucked peeled fiber is classified in a suspended state by means of a double-sided differentiated vacuum suction device - at the top and bottom of the transport stream. At the same time, the latter is preliminarily subjected to an acute blowout of air with a pressure of 0.05–0.15 atm. Directed towards the upper suction, thereby ensuring a uniform redistribution of the fiber throughout the height of the transporting stream due to the removal of its finer and lighter fractions to its upper part. with greater sail. A decrease in air pressure below 0.05 MPa leads to a sharp deterioration in the quality of separation. An increase in air pressure above 0.15 ata leads to an unjustified increase in the energy intensity of the process.

A device for carrying out a method of cleaning mineral fiber with its vertical blow-up. Contains fiber former 1, for example a blow head with an acoustic resonator, designed to process the melt coming from the melting unit 2, a receiving chamber 3, with an air distribution box 4 and 5t installed in its width supplied from the chamber side with louver grilles 6 and 7, mechanism 8 for evacuation of the beads, ring perforated air diffuser

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The favorable duct 9 mounted on the upper wall of the receiving chamber 3 concentrates on the axis of the fiber former 1, the fiber deposition chamber 10 connected by means of the transition tunnel 11 with the receiving chamber 3, the mesh conveyors 12 and 13 with vacuum suction systems 14 and 15, respectively, the first of which The Yu is located in the lower part, and the second is in the upper part of the fiber-coating chamber 10, a system of 16 air nozzles directed towards the upper mesh conveyor 13. An air-tube 4 with a louvered grille 6 is mounted on the front wall of the receiver. The chambers 3, the air duct 5 with the louvered grille 7, is in the bottom of the chamber 3, is made in the form of a chute, covering the evacuation mechanism 8 of the crowns, and forms a reflect screen. For supplying air to ducts 4, 5 and 9, nozzles 17 and 18 are provided. A system 16 of air nozzles is connected 5 to a system of pressurization of air (not detected) using an air collector 19. In the deposition chamber 10 can also be installed binder feed units (not shown). In order to reduce the noise level 30, the fiber-reinforcing fiber is equipped with a sound-insulating screen 20 made in the form of a truncated cone, the opening angle of which slightly exceeds the angle of opening 35 of the flare.

The device works as follows.

The melt coming from the smelter; 2, the melt is inflated with a blow head. 1. At the same time, the melt torch is directed through the receiving chamber 3 downward to the side of the reflecting screen formed by the louvered grille 7 and the air duct is closed 5. At the same time, through the nozzles 17 and 18, ventilator air is supplied to the air duct 4 and 5 and the annular duct 9. The air flow arriving tangentially to the plume from the annular duct blowing 9 twists the flare, thereby ensuring separation of the volacna from the beads, carrying it to the periphery of the torch and partial separation by fractional composition. The air flow entering chamber 3 from box 5 through louvered grill 7 is directed towards the blowing flare

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and dampens the speed of the fibers down. The air flow entering chamber 3 from duct 4 through louvered grill 6 ensures the reorientation of the flight path of the fibers towards the transition tunnel 11. Ringlets flying at a speed of 24-63 m / s reach the reflecting screen - louvre grille 7, hit It is then dropped onto the bottom of the chamber 3 and rebounded, from where it is removed by means of mechanism 8 in the waste collection and reuse system. At the exit from the transition tunnel 11 into the fiber deposition chamber 10, the transport stream of the purified fiber is subjected to an acute blow of a kilometer of air with a pressure of 0.05-0.15 MPa directed towards the upper mesh conveyor 13 by means of an air nozzle system. Due to this, an additional uniform redistribution of the fiber: in the upper part of the fiber deposition chamber 10, a fiber of fine fractions is concentrated, in the lower part — a fiber of larger fractions. The finer fractional fiber mixed with the binder is deposited on the upper mesh conveyor 13 by means of the suction suction system 15, and the coarser fractions are deposited on the lower mesh conveyor 12 on the suction suction system 14.

Example 1. In the production of superfine; mineral fiber by the method of v. Vertical blowing in a melting unit-bath furnace 2 with a de-bitto of 400 kg / h, one obtains a mineral melt based on rocks and corrective additives with an acidity modulus, 8. The temperature of the electrically heated jet feeder is 1450 ° C. The resulting melt is blown into a fiber with a diameter of 0.5–3.5 μm using a blower HEAD. With an acoustic resonator of the VNIPITeploproekt design at a pressure of an energy carrier (superheated steam) of 4.5 MPa. The blow-up torch is directed to a fixed reflecting screen formed by louvres 7 of the air duct 5. At the same time, the blow-up torch is processed. They are three directional air flows. In this case, the first of them is supplied from an annular perforated box 9 at a tangent to the inflation flare.

at a speed of 20 m / s, the second from box 5 through the louver grille 7 towards the torch at a speed of 10 m / s, and the third from box 4 through the louver grille 6 perpendicular to the axis of the torch (from the side) at a speed of 5 m / s . The first stream separates the fiber from the cores, carries it to the periphery of the torch and partially separates into fractions - in the upper part of chamber 3 it concentrates in the main fiber with a diameter of 0.5-1 µm, below - with a diameter of 1-3.5 µm. The counter flow dampens the speed, and the side stream ensures the reorientation of its flight path in the suction direction of the cleaned fiber. Korolki, having a much larger stock of kinetic energy than the fibers, reach the screen and, with it, hit with a ricoche and fall to the bottom of the chamber 3, where they are removed by mechanism 8 to the waste collection and reuse system. At the exit of the transitional tunnel 11, the transporting stream of the purified fiber is subjected to a sharp blowout of air with a pressure of 0.15 atm towards the upper sieve conveyor 13, due to which additional uniform redistribution of the fiber takes place — a thinner fiber is concentrated in the upper part of the fiber deposition chamber 10 fractions of 0.6-1 microns in the lower part - coarser fiber fractions of 1-3.5 microns. : After that, the flow is subjected to a differentiated vacuum suction. At a vacuum in the vacuum suction system 15 equal to 200 mm of water, Art., On the upper conveyor 13 a fiber of 0.6-1 µm fractions is deposited, the proportion of which is about 20% of the total fiber yield. A fiber fraction of 1-3.5 µm is deposited on the lower conveyor 12, the vacuum above the screen of which is maintained within 10 mm of water.

P and measures 2. The blow-off torch during the production of basalt fiber of fractions 0.6-2 µm, to which fuel is added, is subjected, as in Example 1, to three directed air flows. The first of them is fed tangentially to the torch at a speed of 25 m / s, the second one is directed towards it at a speed of 14 m / s, and the third is perpendicular to the axis of the torch at a speed of 10 m / s. The flow of the purified fiber is subjected to classification in suspension by sequentially performing one after another operations of sharp blowing it towards the upper conveyor with 13 jets of air with a pressure of 0.05 atm and differentiated vacuum suction from the top and bottom of the stream. At a vacuum in the system 15 of the vacuum suction equal to 200 ftH of the water line, a fiber of 0.6–6 fractions is deposited on the upper conveyor.

1 micron, which accounts for about 80% of the total yield. The remaining 20% of fiber fractions up to 2 µm are deposited on the lower conveyor 12, above the grid of which a vacuum is maintained in the order of 20 mm of water.

Example 3. The torch of the bulge, as in examples 1 and 2, is exposed to Three directed air currents. U) and this is the first of them served tangentially to the torch at a speed of 22 m / s, the second - towards it at a speed of 13 m / s, the third - perpendicular to the axis of the torch at a speed of 8 m / s. The flow of fiber-free fiber-free inclusions is subjected to classification in suspension by sequentially following each other operations of sharp blowing it towards the upper Conveyor with 13 air jets with a pressure of 0.8 atm and differentiated vacuum suction from above and below the flow.

At a vacuum in the system 15, a suction vacuum equal to 200 mm aq., On the upper conveyor, a fiber of 0.6-1 µm fraction is decoupled, the proportion of which is about 70% of the total yield. The remaining 30% fiber fraction before,

2µm are deposited on the lower conveyor.

Using the proposed method and device for its implementation provides an increase in the degree of purification of mineral super-thin wool from korolkov; fiber classification according to fineness (ultra-fine and super-thin) and reducing its production cost by organizing rational sedimentation on different conveyors, as well as returning the beads to remelting, which is especially important In the production of mullextramplex or basalt fiber | based on expensive raw materials.

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Editor N.Kishtulinets

Compiled by I. Inozemtsev

Tehred V. KadarKorrektor A.Obruchar

Order 2948/28 Circulation 457 Subscription

VNISh of the USSR State Committee

for cases of discoveries and discoveries 1.13035, Moscow, Zh-35, Raushsk nab. 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (2)

1. A method for cleaning a mineral fiber by directing a blow torch onto a reflective screen, treating it with counter and perpendicular air currents, removing the beads and suctioning the cleaned mineral fibers, so that, in order to increase the degree of purification and ensuring fractional uniformity of the purified fiber, the blow-off torch is additionally twisted by the air flows tangential to it, and the suction fiber is subjected to classification in suspension by means of differentiated vacuum risosa above and below the conveying flow, the latter being previously subjected to acute puffing air flow 0.05-0.15 atm pressure in HA. board of the top vacuum suction cup. SU, „. 1234378 A1 2. A device for cleaning mineral fibers containing a fiber former, a receiving chamber with air distribution boxes, one of which is mounted on the wall of the chamber, and the other in the bottom of the chamber, made in the form of a gutter covering the device for removing kings, connected to the receiving chamber by means of a transition the tunnel is a fiber deposition chamber, in the lower part of which there is a mesh conveyor with a vacuum suction system, characterized in that, in order to increase the degree of purification and ensure fractional odor single purified fiber, it is equipped with an annular perforated box installed at the inlet of the receiving chamber concentrically to the fiber former, a system of air nozzles installed at the outlet of the transition tunnel, and an additional mesh conveyor made with a vacuum | Suction system and installed in the upper part of the fiber deposition chamber, Air nozzles are directed towards the additional conveyor.