Centrifugal sawn timber drying method. RU patent 2520271.
 Drier for bulk materials / 2508514Drier for bulk materials includes a rectangular section cabinet containing upper and lower compartments closed with doors; besides, compartments are connected in the left part with an air pipe and in the right part with a gas distributing grid. The left part of the upper compartment is provided with a high-pressure fan, the outlet of which is connected to the air pipe, and the right part of the upper compartment is provided with a 16-bladed rotor on the gas distributing grid. The gas distributing grid is made in the form of a round and has four radial zones, each of which corresponds to one or more sections of the rotor, an unloading zone, a pre-heating zone, a drying zone and a preparation zone for unloading. The unloading zone represents a radial cut-out equal to one rotor section, which is connected to an unloading hatch; the pre-heating zone is equal to two sections of the rotor and has 27 rows of holes with the diameter of 3 millimetres; the preparation zone for unloading is equal to one rotor section and has chaotically located holes with the diameter of 2 millimetres; the lower compartment of the cabinet is provided with an air heating heat exchanger with a heater installed in it; the loading hatch is made in the upper cabinet compartment above the section of the pre-heating zone, which is the first from the unloading zone; in the upper cabinet compartment there is a hole for ambient air intake and outlet of moistened air. The drying zone consists of 8 rows of holes with the diameter of 4 millimetres each with the distance between centres of adjacent holes of 10 millimetres, at the distance between rows of holes of 12 millimetres; with that, one external and two internal rows are located in close proximity to external internal edges respectively of the gas distributing grid. |
 Drier for agricultural crops / 2502927In a drier for agricultural crops, which includes cylindrical chamber 1 with perforated bottom 3 and elastic seal 8 along inner perimeter, which is made in the form of two semi-cylinders installed on vertical axis 2 with possibility of their opening relative to each other, cap 12 arranged in upper part of chamber 1 and movable in vertical direction, which consists of disc 13 with a hole in the centre and cylinder 14 adjacent to it along outer diameter and cone 15 adjacent to it along inner diameter; with that, diameter of the hole in disc 13 is less than minimum allowable diameter of the forging, drying agent supply 17 and discharge 19 pipelines, chamber is made so that it can be turned along bottom 3, and bottom 3 of chamber 1 is equipped with shock absorbers 4 and vibrator 5. Vibrator 5 is made in the form of a disc with counterweight (imbalance) installed so that rotation radius can be changed. Bottom 3 of chamber 1 is equipped with an opening with drying agent supply pipeline 17 and an opening with dried material transportation pipeline 20 to storage place. |
 Carousel dryer / 2493514Carousel dryer comprises a circular frame with a sealed casing forming a plenum chamber, with a window for supplying the drying agent, an annular drying chamber mounted on the frame on the rollers, a loading and unloading devices, the drying chamber drive, according to the invention, the rollers are mounted on the outer side of the plenum chamber and are isolated from it with the seal made of a flexible material and cantilever fitted on the carcass of the annular drying chamber. |
 Carousel dryer / 2456518Carousel dryer has a driving circular drying chamber with an external barrier and a bottom perforated for introduction of a coolant into a layer of dried material, rigidly connected to an inner barrier, installed onto driving and support rollers as capable of rotation, a drive of the drying chamber installed in the drying chamber directly above its bottom for layer separation in the bottom and discharge of the dried material, a discharging device with a L-shaped cutter of the lower grain layer rigidly fixed to the frame, in the cavity of which there is a supply actuator of the discharge device, and with an autonomous drive, a feeder rigidly fixed in the upper part of the frame to supply dried material, arranged downstream the discharge device, an output hole for discharge of the dried material and an air duct, a furnace unit and a heat exchanger, and the supply actuator of the discharge device is arranged in the form of a driving auger. On the side surface of the feeder there are L-shaped guides rigidly fixed, inside of which there is a gate installed as capable of vertical displacement, and on the opposite side of the inner surface of the feeder there are two sensors of loose material level on its inlet and outlet holes, at the same time on the output hole of the discharge device there is a gate installed as capable of displacement in the horizontal plane, and on the L-shaped cutter of the discharge device there is a sensor of coolant moisture. |
 Universal dryer for drying loose and non-loose material / 2449231Universal dryer for drying loose and non-loose material includes a drying chamber, outer and inner walls of a circular form, a grill, a diffuser, an air-conducting channel, a conditioning and heating unit, comprising a combustion chamber formed by the inner surface of the cylindrical heat exchanger, a flue pipe, a fuel injector, a ventilation unit, an electrical fan with a shielding spinner. In the dryer additionally a reversing leveled auger adjustable on height is installed, as well as a feeding conveyor, a fixed shaft, collector rings, brush holders, mobile unloading device with removable cut-off shelves and scrapers, a delivery tray, a shipping air duct, a cyclone, a fan, a counterflow heat exchanger with a pipe. |
 Carousel dryer / 2426047Carousel dryer comprises a frame surrounded with a tight jacket, where there is a window for coolant supply, a circular drying chamber with a perforated bottom installed in rollers, a loading and an unloading device in the form of an auger with an isolator, which comprises a canopy. To exclude overdrying of some material, the isolator canopy is made perforated. |
 Rotary dryer (versions) / 2425308Rotary dryer consists of frame surrounded with sealed jacket, wherein there is made a window for supply of drying agent, and of circular drying chamber with perforated bottom mounted on rollers. The dryer also consists of loading and unloading devices made in form of a screw, a shaft of which by one version is stepped with diameter of steps diminishing in the direction of dried mass transfer, while according to another version a pitch of screw surface increases in the same direction. |
 Centrifugal dryer / 2410616Invention relates to centrifugal dryers, designed for separation of liquid phase from solid materials in particular for drying sheet materials. Centrifugal dryer comprises a body with a lid. In the body there is a rotor mounted on a shaft installed in a bearing knot. The shaft is connected to a rotary drive in the form of an electric motor. Inside the rotor the mesh shell is installed on the top slice of which "П"-shaped ring is fixed, on the outer surface of which screws interacting with the outer surface of the rotor are set. At the bottom of the rotor there are drainage holes for disposal fugato. At the bottom of the mesh shell the shell ring is mounted which at installation the mesh shell covers the centering sleeve. The rotor is connected to the shaft by means of a striker. In the cavity of a rotor there is a clamp device in the form of a perforated flexible insert that can be made in the form of a flexible metal or polymer network, or as separate elements, interconnected by a hinge or flexible connections. |
 Carousel drier / 2395769Carousel drier includes annular-shaped drying chamber with perforated bottom for introduction of heat carrier, which has the possibility of rotation, loading conveyor, feeder consisting of two rectangular walls connected along edges and having various width, control mechanism of inclination angle of each of them to the bottom and screw or drag conveyor installed between walls parallel to the bottom, and unloading device in the form of screws. |
 Aerated bin / 2365839Invention pertains to farm machinery industry and may be employed for grain drying. Aerated bin consists of a perforated cylinder, air distribution pipe, electric heater, fan. Rotating hollow drum with circular section metal rods arranged in four rows along the perimetre of the hollow drum is placed inside perforated cylinder. Hollow drum is equipped with an individual driving mechanism, containing electric motor and reducing gear. |
 Drier / 2244887Proposed drier has bin-proportioner, drying chamber formed by outer and inner walls, unloading unit and taper screened splitter located above drying chamber. Mounted additionally in drying chamber are screened and helical surfaces whose generatrices are located at acute angle relative to horizontal plane. Unloading unit has revolving perforated platform and grain receiver with sluice lock. Air system includes air duct, fan and electric motor. |
 Method and device for drying wet material / 2303214Method comprises supplying wet material to the feeder and then to the rotating ring-shaped drying chamber. The dried bottom layer is discharged and directed to the cooling chamber. The wet material is supplied at least in two stages. The device comprises housing provided with top and bottom chambers and conical insert that defines converging passages together with the housing. The outlet openings of the passages are positioned at different heights, and air duct is set into the conical insert. |
 Grain dryer / 2327521Thanks to perforated bottoms rotation of grain dryer, tube grain pipes which allow aligning the layer of the cereals supplied by the reservoir, and also due to the possible selection of dried grain directly to the freight transport or to the wagons platform, the process of drying grain intensifies and transportation time of final product reduces. Due to economic construction units and assemblies of the grain dryer, if there is the simple sets of engines, gearboxes, gear and monorail devices as well as the equipment for loading and unloading of the grain which is suitable for the use in mechanised road and rail transport, the grain dryer is practically applicable at harvest and cereal preparations for storage and its preparation for sale. |
 Agricultural product dryer / 2355962Invention relates to drying equipment, in particular to annular counterflow dryers and can be used for drying loose agricultural products, for example, grain. A dryer for agricultural products comprises a fixed annular drying chamber with holed bottom to supply heat carrier to the material layer, loading and unloading devices which are connected to the central shaft from time to time. The drying chamber comprises a feeder in the form of a bin with metering device set along the whole chamber radius with an unloading device; a flow down tray able of copying the dried layer surface is connected to the metering device by hinges. The feeder in the dryer can be made as a bin with an unloading device, connected to the central shaft with the possibility of conjoint rotation in the drying chamber during the material loading and unloading. |
| Aerated bin / 2365839 Invention pertains to farm machinery industry and may be employed for grain drying. Aerated bin consists of a perforated cylinder, air distribution pipe, electric heater, fan. Rotating hollow drum with circular section metal rods arranged in four rows along the perimetre of the hollow drum is placed inside perforated cylinder. Hollow drum is equipped with an individual driving mechanism, containing electric motor and reducing gear. |
| Carousel drier / 2395769 Carousel drier includes annular-shaped drying chamber with perforated bottom for introduction of heat carrier, which has the possibility of rotation, loading conveyor, feeder consisting of two rectangular walls connected along edges and having various width, control mechanism of inclination angle of each of them to the bottom and screw or drag conveyor installed between walls parallel to the bottom, and unloading device in the form of screws. |
| Centrifugal dryer / 2410616 Invention relates to centrifugal dryers, designed for separation of liquid phase from solid materials in particular for drying sheet materials. Centrifugal dryer comprises a body with a lid. In the body there is a rotor mounted on a shaft installed in a bearing knot. The shaft is connected to a rotary drive in the form of an electric motor. Inside the rotor the mesh shell is installed on the top slice of which "П"-shaped ring is fixed, on the outer surface of which screws interacting with the outer surface of the rotor are set. At the bottom of the rotor there are drainage holes for disposal fugato. At the bottom of the mesh shell the shell ring is mounted which at installation the mesh shell covers the centering sleeve. The rotor is connected to the shaft by means of a striker. In the cavity of a rotor there is a clamp device in the form of a perforated flexible insert that can be made in the form of a flexible metal or polymer network, or as separate elements, interconnected by a hinge or flexible connections. |
| Rotary dryer (versions) / 2425308 Rotary dryer consists of frame surrounded with sealed jacket, wherein there is made a window for supply of drying agent, and of circular drying chamber with perforated bottom mounted on rollers. The dryer also consists of loading and unloading devices made in form of a screw, a shaft of which by one version is stepped with diameter of steps diminishing in the direction of dried mass transfer, while according to another version a pitch of screw surface increases in the same direction. |
| Carousel dryer / 2426047 Carousel dryer comprises a frame surrounded with a tight jacket, where there is a window for coolant supply, a circular drying chamber with a perforated bottom installed in rollers, a loading and an unloading device in the form of an auger with an isolator, which comprises a canopy. To exclude overdrying of some material, the isolator canopy is made perforated. |
| Universal dryer for drying loose and non-loose material / 2449231 Universal dryer for drying loose and non-loose material includes a drying chamber, outer and inner walls of a circular form, a grill, a diffuser, an air-conducting channel, a conditioning and heating unit, comprising a combustion chamber formed by the inner surface of the cylindrical heat exchanger, a flue pipe, a fuel injector, a ventilation unit, an electrical fan with a shielding spinner. In the dryer additionally a reversing leveled auger adjustable on height is installed, as well as a feeding conveyor, a fixed shaft, collector rings, brush holders, mobile unloading device with removable cut-off shelves and scrapers, a delivery tray, a shipping air duct, a cyclone, a fan, a counterflow heat exchanger with a pipe. |
FIELD: heating, drying.
SUBSTANCE: invention relates to artificial dehydration of timber and can be used at timber processing works. A method involving laying of sawn timber onto a flexible belt, formation of a pack of sawn timber on the outer surface of the pulley housing by winding the flexible belt with sawn timber laid onto it on the pulley housing on the outer side, balancing of the pulley with the pack of sawn timber and its rotation.
EFFECT: invention reduces time costs for formation of a pack of sawn timber on the drum outer side; besides, there is a possibility of applying this method in automatic sawn timber drying lines.
1 dwg
The invention relates to artificial dehydration of wood and can be used in technological lines for obtaining timber industrial scale at woodworking enterprises.
There is a method of centrifugal drying of sawn timber, including the formation of a package on the external surface of the drum corps and rotate it with speed, providing centrifugal dehydration lumber [1].
The disadvantage of this method is that the formation of the package of sawn timber on the body surface of the drum is done by hand by laying individual timber special grooves, resulting in significant time for this operation, and the operation of unloading timber after drying. Moreover, due to the need for manual packing of a package of sawn timber on the surface of the drum, this method cannot be applied on automatic lines timber drying.
There is a method for rotating drying of wood, including the formation of a package of processed wood products, the supply of the service and its strengthening in the cavity of the drum, balancing of drum with strengthened packages processed wood products, and rotate it with speed, providing centrifugal dehydration lumber [2].
The disadvantage of this method is that the moisture under the influence of centrifugal force passes through the entire package (from the base of the package to the inner wall of the drum). This leads to a significant increase in time of a rotating drying, and consequently, to the increase of energy consumption.
The technical result, the achievement of which is directed the claimed method is less time on formation of package of sawn timber on the outside of the drum. In addition, there is a possibility of applying this method in automatic lines timber drying.
The technical result is achieved by ensuring that timber is laid on the floppy ribbon, and formation of a package of sawn timber on the external surface of the body of the drum shall exercise by winding of flexible tape laid on her timber in the body of the drum from the outside.
The example of the method is shown in figure 1 - installation scheme for centrifugal drying saw-timbers.
The installation consists of a drum 1, flexible tape 2, drying chamber 3, feeding mechanism 4, receiving table 5.
Drum 1 includes the body of the drum 6, mounted on the shaft 7, supports 8, the actuator 9, transmission 10, belt 11, pulleys 12 and 13, the balancing mechanism 14, pick-stretch mechanism 15, fixation device 16 and the brake system, located on the shaft 7 (not shown).
Drying chamber 3 consists of walls 17, protective covers 18, baths 19 and drain pipe 20.
The feeder 4 includes conveyor 21 and the locking mechanism 22.
Reception table 5 has openings for discharge of water (not shown).
Drying of saw-timbers is carried out as follows. End of the flexible tape 23 using the mechanism of fixing 22 fix on the feeder 4. Then lumber 24 conveyor 21 fit on a floppy tape 2.
After filling flexible tape 2 lumber 25 are forming the package of sawn timber on the body surface of the drum 6. To do this, on the gearbox 10 include a lower gear and use the drive 9, pulleys 12 and 13, belt 11 flexible tape 2 with laid on her lumber 25 wound on the surface of the drum 6.
Laying of lumber 24 conveyor 20 can be made simultaneously with the formation of the package of sawn timber on the body surface of the drum 6. To do this, sawn timber 23 by the conveyor 20 fit on a floppy tape 2. While simultaneously carry out rotation of the drum corps 6 and unwinding capture-tensioning mechanism 15 flexible tape 2, so that a flexible tape 2 sagging under the weight placed on it lumber 25 and kept them on the body surface of the drum 6. In the process of performing simultaneous laying of lumber 24 on the floppy ribbon 2 and formation of a package of sawn timber on the outer surface of the hull drum 6 on the gearbox 10 included reduction gear.
After one revolution corps drum around the shaft 6 7 end of the flexible tape 23 mounted on the device of fixing 16.
Next, using the capture-stretch mechanism 15 is the final consolidation of the lumber 25 on the body of the drum 6.
Then close the cover 18 and include a second transfer to the transmission 10. Using the drive 9, pulleys 12 and 13, belt 11 the body of the drum 6 with a fixed lumber 25 provides a rotary motion. In the process of rotation of the drum corps 6 using the balancing mechanism 14 is its balancing.
When rotating centrifugal force is the removal of water from sawn timber. Water, getting on the inner surface of the walls 17, protective covers 18 and on reception table 5, flows down into the tub 19 and is removed through the drain pipe 20 of the drying chamber 3.
After the end of the centrifugal drying the body of the drum 3 using the brake system is stopped with the help of the device of fixing 16 free end of the flexible tape 23, the timber is unloaded at the reception table 5, and then deleted from the drying chamber 3.
Further protection cover 18 rises and the operation is repeated.
The inventive method reduces the time spent on preparation of a package of lumber, as eliminates manual laying individual timber on the surface of the drum. In addition, you receive an opportunity to make stacking of sawn timber on the floppy ribbon and to form a package of sawn timber on the body of the drum, which further reduces the time spent on the formation of the package. By eliminating manual bundle of sawn timber on the external surface of the drum the proposed method may be applied in automatic lines timber drying.
BIBLIOGRAPHY
1. Patent RU 114360 "Device for drying of saw-timbers", the priority of 20.03.2012.
2. Patent RU 2279613 "Installation for rotary drying of wood", a priority from 27.04.2006.
The method of centrifugal drying of sawn timber, including the formation of a package on the external surface of the drum corps, balancing of drum with a package of lumber and rotate it with speed, providing centrifugal dehydration lumber, wherein timber placed on the floppy ribbon, and formation of a package of sawn timber on the external surface of the body of the drum shall exercise by winding of flexible tape laid on her timber in the body of the drum from the outside.