SU735883A1 - Sheet material dryer - Google Patents

Description

(54) DRYER FOR SHEET MATERIAL

Claims (2)

The invention relates to drying installations used in various sectors of the national economy, for example in the woodworking industry for drying veneers. Multistorey roller dryers are known that contain a drying chamber with paired driven ropes in each floor to move the pees of the dried material between them. On adjacent floors, the rollers are placed in pairs in chess order of ll. However, the capacity of these dryers is limited due to the impossibility of reducing the distance between the floors according to the conditions for placing the rollers with the minimum allowable diameter. Also known are dryers dp of sheet material, structurally the closest to the proposed one, containing heated pallets located along the river bed, between which sheets of dried material are placed, and the mechanism of vertical movement of pallets 2. The dryers of such dryers are also low due to high heat losses and low speeds movement of the material being dried. The purpose of the invention is to increase the productivity of the dryer. This is achieved by the fact that the trays are made wavy and in the adjacent Tiers are offset by half the length of the trays with the formation of tubular channels for the heating medium. FIG. Figure 1 shows schematically the proposed dryer, a transverse section; in fig. 2 is the same, longitudinal section 3j in FIG. 3 shows a set of pallets; in fig. 4 - pallet, top view. In the heat-insulated chamber 1 are placed wavy corrugated pallets 2. Between the pallets 2 are placed sheets 3 of the dried material. In the end wall of the drying chamber 1, there is an upper entrance window 4 and a lower 373 exit window 5. In the bottom of the continuous chamber 1, a discharge bog 6 is smoldering adjacent to the lower exit window 5, a curtain-stop 7 is attached to the bottom of the exit window 4, an external loading conveyor 8 adjoins, and an external lifting part 9 of the mechanism for vertical movement of pallets 2 is installed between the output 5 and the upper entrance 4 windows. The drying chamber 1 consists of sections (the number of sections can be increased). Each section contains vertical branches 10 of the mechanism of vertical movement and packages of wave-shaped pallets 2, which are retained by cantilever pins 11 in slots (not shown) of the mechanism of vertical movement. The pallets 2 are arranged along the lines of adjacent russes swept away half the length with the formation of tubular channels 12 for the heating environment. The dryer works as follows. When the vertical branches 10 of the mechanism of vertical movement move, podrna 2 move down and one by one moves to the BOTTOM receiving part of the mechanism and then goes to the output window 5 of the drying chamber 1, then after leaving the chamber {n 1 1) the external lifting part 9 of the vertical mechanism picks up displacements and alternately accelerated upward under the cut of the external feed conveyor 8. Then each pallet 2 is captured by the loading of the distributor part of the mechanism: rzm And begins to move from to the input section 4 Sushion-1 1. At the same time, the external loading conveyor in, from which it begins to descend onto the pallet 2, sheet 3 of the material to be dried is loaded onto the pallet 2. So, when moving a sheet of material, it rests on the pallet 2. Next, the pallets 2 with the sheets 3 of material are moved to the end of the drying chamber, and then a group of pallets is moved downwards in the drying chamber section to the vertical branches 1O of the vertical movement mechanism. Then another group of pallets with sheets of material is placed on top of this group of pallets. This is how the drying chamber 5 is filled with the material being dried and moving it down. During the transfer, the sheets 3 of the material over the intervals of the waves of the adjacent pallets 2 are intensively blown with heated air and dried. Pallets 2 with sheets of dried material 3 are moved one by one to the receiving part of the mechanism. Next, the pallets 1 alternately move to the exit window 5 above the discharge hatch 6. When moving into the exit window 5, the shutter-stop 7 holds the sheet of dried material and the pallet leaves the sheet and the sheet falls into the discharge hatch 6. Free pallets again rise up to boot, and the cycle repeats. The calculation shows that the use of a dryer with wave-shaped pallets paevolit approximately double the removal of dried material per square meter of production area and significantly reduce the metal consumption for the manufacture of the dryer. In the proposed dryer, the creases of the material being dried, for example, veneer, which takes place in the well-known roller dryers, are completely excluded, and n: it is possible to dry the Mini veneer, as thin as possible, and as thick as possible. Formula of the Dryer for sheet material, mainly veneer, containing piled pallets tied in between, between which sheets of dried material are placed, and the mechanism of vertical remeshting pallets, characterized in that pallets are wavy and in adjacent rus are shifted by half the wavelength to form tubular channels for the heating medium. No; sources of information taken into account during the examination 1. USSR author's certificate Ma 399696, cl. F 26 В 13/04, 1970. 2. USSR author's certificate number 212135, cl. F 26 B 15 / 2O, 1968 (prototype). Phage.1 / X S XxSXW X- # c 5 V; Syrxrx / / / - /. .Xx 2, 2 pwe. J and fug A ff D