JP2018009774A - Drying method for laminating and sending air in wooden chip drying facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quicken drying by using only heated hot air in a ceiling part, in view of the fact that since a conventional wooden chip drying method includes mixing heated hot air in a ceiling part of a wooden chip drying facility with dehumidified low-temperature air which has passed a snow mountain, and sending the mixed air to accumulated wooden chips, the temperature of wooden chips becomes low and it takes time to dry.SOLUTION: A drying method includes laminating a space in a wooden chip drying facility 1 into three layers by a temperature difference of air between an upper layer 9 and a middle layer 8, and a weight difference between the middle layer 8 and a lower layer 13, and sending warm dried air in the upper layer to accumulated chips 2 for drying. Furthermore, the drying method includes dividing a space in the drying facility into upper and middle layers and a lower layer to block the circulation of air, laminating the two layers of the upper and middle layers, and sending warm dried air in the upper layer to accumulated chips for drying.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for drying a wood chip using solar heat and snow cooling.

  A conventional method of drying wood chips that uses solar heat and snow-cooled heat is to install a blower in the chip drying facility and build a snowy mountain, then use this blower to draw warm outside air into the snowy mountain to form a snow cave, and Condensation is obtained by bringing outside air into contact to obtain low-temperature dehumidified air, which is sucked into the chip drying facility with the same blower, and warm drying air in the heat storage at the ceiling of the drying facility soaked with fluorine film to capture solar heat There is a drying facility that sucks and mixes and blows from under the wooden chips that are deposited through the piping. (For example, refer nonpatent literature 1).

  Hereinafter, a conventional wood chip drying method will be described with reference to FIG. In FIG. 3, 21 is a snowy mountain covered with a wood chip, 22 is an outside air outlet, 23 is a snow cave, 24 is an outdoor pipe, 25 is a fluorine file-fired wood chip drying facility, 26 is a heat reservoir, 27 is a blower, 28 is an indoor Piping, 29 is an outlet in the deposited wood chip, 30 is a deposited wood chip, and 31 is an exhaust port.

  Utility model registration No. 3182291 “Drying equipment for pin chips etc. by combination of solar heat and snow and ice cold heat”

  In the conventional method of drying wood chips described above, when the warm air in the heat sink at the ceiling of the drying facility and the low-temperature air that has been dehumidified after passing through the snowy mountain are mixed, the air is sent to the accumulated wood chips. The temperature of the deposited chips was low and the time required for drying was long, and it was difficult to dry several times a year in the drying facility, and it was not a high quality wood chip for well-dried fuel.

  The present invention is intended to solve such a conventional problem, and aims to speed up drying by using only warm air in the heat reservoir of the ceiling.

  And in order to achieve said objective, this invention laminates | stacks the space in a drying plant | facility in the three layers of the upper middle middle layer according to the weight and temperature of air.

  In the three-layer stacking, the lower layer air is blown out from below the wood chip on which the warm and dry air obtained in the upper layer is obtained by the blower 1, and contains the moisture of the chip when rising in the deposited chip. It becomes heavy air and forms a blowout lower layer on the deposited chip.

  This moist and heavy air is naturally exhausted from the exhaust vents on both sides of the facility.

  The middle-layer air sucks low-temperature light air that has passed through the snowy mountains and is dehumidified by the blower 2, and blows out into the facility space to form a middle layer.

  The air in the upper layer is pushed up by the air blown out to the middle layer, and warmed by the temperature and solar radiation at the ceiling in the drying facility.

  This warmed air is sucked in by the blower 1 and blown out from below the wooden chips accumulated through the pipes to dry the wet wooden chips.

  The lower layer and middle layer use the difference in weight, the middle layer and the upper layer use the difference in temperature to achieve lamination, and send warm dry air with a blower to increase the drying speed and achieve uniform high quality. Make wood chips for fuel.

  Moreover, the space in the drying facility is divided into an upper middle layer and a lower layer, and two layers of the upper middle layer are laminated.

  The partition air is blocked by the partition material at the boundary between the middle and lower layers.

  The air in the lower layer is blown out from below the wooden chips on which the warm dry air obtained in the upper layer is collected by the blower 1, and becomes heavy air containing moisture of the chips when rising in the accumulated chips, and on the deposited chips A blowout lower layer is formed.

  The moist air in the lower layer is partitioned by the partition material and naturally exhausted outside the facility without coming into contact with the air in the middle layer.

  The middle-layer air sucks low-temperature light air that has passed through the snowy mountains and is dehumidified by the blower 2, and blows out into the facility space to form a middle layer.

  The upper layer air is pushed up by the air blown to the middle layer, heated by the air temperature and solar radiation at the ceiling in the drying facility, sucked in by the blower 1, blown out from below the wooden chips deposited through the piping, and wetted Dry the wood chips.

  The lower layer and the middle layer are not in contact with each other by being partitioned by the partition material, and the middle layer air is pushed up to the upper layer by the continuous air supply of the blower 2, and the middle layer and the upper layer are laminated by the temperature difference, and the warm dry air by the blower 1 The air is fed to increase the drying speed and produce a uniform high quality wood chip for fuel.

  As described above, the wood chip drying method of the present invention allows drying operations to be performed a plurality of times per year by rapidly drying, and the amount of processing at one facility is dramatically increased.

  In addition, the air supply temperature is high, the drying capacity is increased, and high quality and stable supply is possible.

  A diagram of stacking air in a snowy mountain and a drying facility into upper, middle, and lower layers   A diagram of dividing the air in the snowy mountains and the drying facility into upper and lower layers and stacking the upper and lower layers   Circulation diagram showing a conventional mixed use embodiment

  Hereinafter, embodiments and operations of the present invention will be described with reference to FIGS.

  In FIG. 1, 1 is a fluorine film-fired wood chip drying facility, and 2 is a wood chip deposited in the facility.

  3 is a snowy mountain covered with wood chips, 4 is a blower 2 for sucking outside air, 5 is a suction port for warm outside air, 6 forms a snow cave, 7 is an outdoor air supply pipe, 8 is in a drying facility Blow out to the middle layer.

  The blown-out air is heated by outside air and solar radiation, and ascends to the upper layer of 9 dry facility spaces. At the same time, it is sucked by 10 blowers 1 and deposited from 12 stacking chip outlets by 11 indoor air supply pipes. Be blown out to the wood chips that are.

  The blown air adsorbs moisture contained in the accumulated wood chips and blows out to the lower layer of the 13 drying facility spaces.

  The blown-out air is naturally exhausted from the 14 exhaust ports without heavy rising.

  In FIG. 2, 1 is a fluorine film-fired wood chip drying facility, and 2 is a wood chip deposited in the facility.

  3 is a snowy mountain covered with wood chips, 4 is a blower 2 for sucking outside air, 5 is a suction port for warm outside air, 6 forms a snow cave, 7 is an outdoor air supply pipe, 8 is in a drying facility Blow out to the middle layer.

  The blown-out air is heated by outside air and solar radiation, and ascends to the upper layer of 9 dry facility spaces. At the same time, it is sucked by 10 blowers 1 and deposited from 12 stacking chip outlets by 11 indoor air supply pipes. Be blown out to the wood chips that are.

  The blown air adsorbs moisture contained in the accumulated wood chips and blows out to the lower layer of the 13 drying facility spaces.

  The air blown to the lower layer of 13 is prevented from rising by 15 partition members, and is naturally exhausted from 14 exhaust ports.

1 Fluorine film-fired wood chip drying facility 2 Stacked wood chip 3 Snow mountain covered with wood chip 4 Blower 2
5 Outside air outlet 6 Snow cave 7 Outdoor air supply piping 8 Middle layer of drying facility space 9 Upper layer of drying facility space 10 Blower 1
11 Indoor air supply pipe 12 Stacked chip outlet 13 Lower layer of drying facility space 14 Exhaust port 15 Partition material

Claims (2)

  A method of drying the space inside the wood chip drying facility by layering the upper layer and the middle layer into three layers according to the temperature difference of the air, the middle layer and the lower layer by weight, and sending the warm dry air of the upper layer to the deposition chip   A method of partitioning the space inside the wood chip drying facility into upper and lower layers and blocking the air flow, stacking the upper and middle layers, sending warm dry air in the upper layer to the deposited chips, and drying

Images