SU1212799A1 - Line for manufacuring wood fibre compound - Google Patents

Description

The invention relates to wood pulp manufacturing lines and can be applied in the pulp and paper industry.

The purpose of the invention is to increase productivity.

The drawing shows the scheme of the proposed line.

The wood fiber production line includes grinding unit 1, masses) 11wire 2, cyclone separator 3 pair, a discharge wagon 4, on which light emission sensors 5 are optically connected to converter 6, which is electrically connected an amplifier-comparator 7, a time delay device 8 and an actuator 9 with a gate valve 10 In addition, an X-ray emitter 11 with a detection unit 12 and an amplifier 13 are connected to the discharge funnel connected to the actuator 1 4, made in the form of a gate valve 15, a chamber 16, a scattering wheel 17 with an opening 18. The line contains an additional mass pipe 19, a pair of fans 20, a lint 21 to introduce the binder and a dryer pipe 22.

The line for the manufacture of wood pulp is as follows.

From the grinding plant 1, the wood fiber is injected into the cyclone separator 3 by the excess vapor pressure of the mass line 2. In cyclone 3, the wood fibers are separated from the steam, which is emitted into the atmosphere, and the fibers themselves, through the discharge funnel 4, are directed to an additional mass conduit 19. The damper gate 10 is in the position that blocks the hole, through which the sparks are removed together with the fiber. Wood fiber with the help of a pressure fan 20 is advanced along an additional mass line 19. In this case, the damper gate 15 closes the inlet channel of the chamber 16 connected to the peripheral part of the chamber. The wood fiber passes through the central opening 18 of the spreading wheel 17, then the pressure fan 20. Into the output part of the additional device after the twisting device, through the nozzle 21 enters 2127992

from the binder and then the tarred fiber into the dryer tube 22. If the light emission sensor 5 detects a spark, then the system that detects and removes sparks is triggered. The signal from sensor 5 enters converter 6. Here, the light pulse is converted into an electrical signal, which is transmitted to the amplifier-comparator 7, where it is compared with a predetermined threshold value, passes a logical evaluation and amplifies, then the electrical signal enters the time delay device 8 ,

J5 which delays it for the time required to fly a spark to the gate valve 10. After the time delay device 8, an electrical signal is transmitted to the executive mechanism 9, which acts mechanically on the gate valve 10, closes the conduit 19 for the time required to eject the burned part -fibrous mass.

25 Zatea vane gate. 10 automatically opens, i.e. technological process passes without stopping.

The pulsed x-ray emitter 11 constantly shines through the pulp passing through the discharge funnel 4 with a frequency of 100 pulses per second. Detection unit 12 detects X-rays from radiator 11. When a particle having a higher density than a pulpwood (such as stones, metal particles, etc.) passes by, detection unit 12 carries an electrical signal to the amplifier 13, which strengthens it and transfers it to the actuator 14. The actuator 14 overlaps the central

 the input channel of the camera 16. At the same time, the scattering wheel 17 is driven from the signal of the amplifier 13. Due to the inertial forces generated by the blades of the scattering wheel 17, heavy particles that fall into the zone of action of these forces are thrown to the peripheral part of the camera 16 and selected, and the wood the fiber through the opening 18a55 of the throwing wheel 17 is directed to the mixer due to the pull created by the pressure fan 20. After a predetermined time determined by

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the sum of the transit time of foreign inclusions and particles from the pulsed x-ray emitter 11 to the scattering wheel 17 and the time of removal of these particles by inertial forces through the opening in the chamber 16 of the scattering wheel 17, the actuator 14 switches the gate valve 15 to the input wood pulp 15 the channel of the chamber 16. At the same time, the drive of the scattering wheel 17 is turned off, and the wood fiber enters through the central opening 18 into the pressure fan 20 and further into the drying tube 22, tons. . the process continues without interruption.

Thanks to a new, constructive solution, the line provides increased productivity by reducing the fire hazard of production.

By reducing the line downtime associated with fires at the grinding - drying site, a plant for the production of wood-fiber boards in a conventional manner with a capacity of 17 million m of slabs per year can have an efficiency of more than 15 thousand rubles.

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Claims (1)

LINE OF PRODUCTION OF WOOD FIBER MASS, including grinding plant, mass pipe, cycle. bosom steam separator, optional. a mass pipeline with loading and unloading funnels, a pressure fan and a nozzle, as well as a tube dryer, characterized in that, in order to increase productivity, it is equipped with a device for separating foreign inclusions in the form of a pulsed X-ray emitter with a detection unit connected via an amplifier to an actuator, which is made in the form of a chamber with inlet and outlet channels and a spreading wheel with a central hole, in this case the input channel has a slide gate, and behind the cyclone separator m of steam on the discharge funnel light sensors are installed, connected through a converter, an amplifier-comparator and a time delay device with a slide actuator. SU „1212799 1 ί