JP2008051491A - Supersized far-infrared circulation type grain drier, and grain drying method for reducing water content deviation between grain layers in storage chamber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain improvement such as reduction of water content deviation between upper and lower layers of grains circulated in a dryer, as to an ultralarge-scaled circulation type grain dryer of 20 ton or more of scale using a far-infrared radiation. <P>SOLUTION: This supersized circulation type grain dryer is provided with at least four central air blowing chambers in a drying chamber, and is built in with a far-infrared radiation body for discharging hot air while emitting the far-infrared radiation. The hot air is distributed uniformly by a heat exchanger provided outside the drying chambers, to be supplied in the far-infrared radiation body. The far-infrared radiation body is formed into a vertically long diamond (substantially lozenge) shape to emit the far-infrared radiation more in a side face direction than in a vertical part side. Shutter drums are made to be individually driven, and the each shutter is driven according to a pattern of a processor. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a far-infrared circulation grain dryer, and more specifically, an ultra-large circulation grain dryer adopting a far-infrared drying method and a moisture content deviation between grain layers in the dryer. It relates to a grain drying method.

  In general, cereals such as rice and wheat harvested in the production area must be dried first for storage and transportation until they reach the consumer. This is because cereals harvested in the production area usually have a high moisture content of 20 to 30%, so they easily change in quality or rot and cause deterioration in grain quality and quantitative loss. Therefore, cereals must be dried immediately after harvesting to a moisture content of about 15% for safe storage, transportation and taste preservation.

  For this reason, circulating grain dryers have been widely used to dry the moisture content of rice and wheat to a certain level by sending dry hot air while forcibly circulating grains such as rice and wheat.

  However, since the circulation type grain dryer heats the sucked air with a burner and passes the heated air through the grain layer to dry the grain, a lot of heat is discharged with the air and disappears. In addition to low efficiency and high fuel consumption, the temperature of the drying hot air is set high in order to maintain the drying speed. Therefore, there is a problem in that the taste of the grains is lowered by high temperature drying, and the body split ratio is increased.

  Therefore, recently, in order to obtain high quality grains while increasing the drying efficiency, grain dryers using far infrared rays have become mainstream.

  As an example of the circulation type grain dryer using the far-infrared radiator, for example, a circulation type grain dryer equipped with the far-infrared radiator of Patent Document 1 filed by the present applicant is disclosed.

  As shown in FIGS. 1 to 3, the circulation type grain dryer equipped with the far-infrared radiator has a lower transfer device 14 for transferring grains input from a grain input gate (input port) 12, The elevator 16, the upper transfer device 18, the leveling machine 20, the storage room 22 for storing the grain, and the drying room 24 for drying the grain by hot air are provided in the drying room 24. A central mesh member 28 on which a grain layer is formed, a square mesh member 30, a left and right mesh member 32, and a shutter drum 34 for transferring the grain from which moisture has been removed to the lower part. Further, a far-infrared radiator 50 is disposed inside the drying chamber 24. The far-infrared radiator 50 is installed so as to be horizontal with respect to the bottom surface of the apparatus inside one end side of the central exhaust chamber 26, and a burner 56 is attached to one end side, and far-infrared rays are disposed on the outer peripheral surface. A cylindrical combustion furnace 52 coated with a ceramic paint 53 so as to radiate the gas, and one end of the central exhaust chamber 26 through the upper part of the combustion furnace 52 curved upward on the other end side of the combustion furnace 52 And an exhaust pipe 60 coated with a ceramic paint 68 so as to emit far-infrared rays on the outer peripheral surface. Further, on the other end side of the central air exhaust chamber 26, a blower 66 that is disposed on the opposite surface of the burner 56 and forcibly exhausts the hot dry air is provided.

  The circulation type grain dryer equipped with the far-infrared radiator having the above-described configuration was used for a medium-sized and small-sized dryer and was useful for obtaining high-quality grain.

  However, as the industry developed, the scale of grain dryers became larger, and the structure of far-infrared radiators changed. Thus, when the scale of the circulation type grain dryer is changed from a large size to a very large size, it is necessary to design a dryer from a medium size to a very large size that meets a desired condition. First, the condition of the dryer must be dried within a predetermined time, that is, until the moisture content is about 15% at a drying rate of 0.8 to 1.0%. This is because if the grain is dried too fast, the grain breaks due to a sudden dehydration phenomenon, and conversely, if the grain is dried too slowly, the operating efficiency of the dryer is reduced within a limited harvest period. is there.

  Therefore, the present inventors conducted research and development to develop an ultra-large far-infrared circulation type grain dryer with a far-infrared drying method and a drying performance of 0.8 to 1.0% per hour. .

  In order to manufacture an ultra-large dryer that meets the above conditions, the fuel consumption of the burner is very large compared to the conventional apparatus. That is, considering the fuel consumption of the burner in the super large dryer according to the present invention so as to meet the drying performance, the burner is 4. It was concluded that two burners with OG / H performance were suitable.

  Such 4. The burner with the OG / H performance has a problem that it cannot be installed in the central exhaust room as it is because of its large scale. Therefore, the burner and heat exchanger are separately installed outside the dryer. It was installed and connected to a hot air supply pipe, and it was developed to supply hot air into the central exhaust chamber.

  In the prior art, one or two central air exhaust chambers are formed and the grain layer to be dried is lowered on both sides thereof. However, in the present invention, four central air blow chambers are formed and measured on both sides. Eight grain dry layers were formed. Then, two burners and two heat exchangers were provided, and the development was carried out so that the hot air was distributed into two forks in each heat exchanger, and the hot air was supplied to each central blower chamber.

  The problem in the course of such research and development was that hot air was distributed into two branches with a single heat exchanger and supplied to each central ventilation chamber.

  In other words, even though the distributed hot air must be supplied so as to have a uniform temperature, the amount of hot air distributed is different from each other and maintains a uniform temperature. It was difficult.

  Of course, it is possible to dry the grain within a fixed time by supplying hot air suitable for drying capacity, but it is difficult to meet the Korean government's policy. In other words, according to a notification from the Korean government, the temperature of hot air actually applied to the grain after being put into the grain dryer is reported to be maintained at an average of 55-60 ° C. It is difficult for the dryer according to the invention to always maintain the average temperature chart 55-60 ° C, which is a notification of the Korean government, because hot air is discharged randomly into the bifurcated hot air supply pipe by a heat exchanger. There was a problem.

  In addition, the shape of the central blower chamber is designed to be a long diamond shape (substantially rhombus) so that the grains descend on both sides. As a reference, the far-infrared rays are evenly radiated on the upper, lower, and both sides of the central blower chamber. There also arises a problem that a large amount of far-infrared rays cannot be irradiated on both sides where infrared rays must be irradiated.

  On the other hand, the circulation type grain dryer is a circulation type dryer in which the grains put in at the top are lowered while being dried on both sides of the central exhaust chamber and are pulled up and repeatedly dried.

  However, in such a circulation type grain dryer, there is a problem in that the deviation of the moisture content between the upper and lower layers of the circulated grains does not decrease when the size is changed to a very large size.

  In other words, the cereal grains harvested in the production area have different moisture contents in each harvest area. For example, suppose that the grain harvested by Farmer A has a moisture content of 35% and that the grain harvested by Farmer B has a moisture content of 20%, both farms can harvest grain harvested in the production area. In this way, the cereals input in this way are stored in the bottom layer of the dryer, where the A farmer cereal with a moisture content of 35% is stored, and the B cereal with the 20% moisture content in the upper layer. Will be stored.

  When the grain is dried in such a state, first, the grain of Farmer A passes through the grain layer adjacent to the central ventilation chamber and is dried at a drying rate of 0.8 to 1.0%. It falls to the lower part, is transferred again to the upper part, and is put into the storage room again.

  At this time, the grain passing through the shutter drum is checked by a moisture sensor, and if it is determined that the moisture content is 15%, which is an appropriate moisture content, the grain inside the dryer is discharged to the outside.

  However, the grain checked by the sensor is the grain of Farmer B whose moisture content has been low since harvest, and the grain of Farmer A at that time is still not a dry grain because the moisture content is still over 20% .

  Such an event is a problem that has not been observed in small and medium-sized dryers. This is because the drying performance of a medium-sized and small-sized dryer is less than a few tons, and the grains to be dried are generally grains harvested by one farmer.

  The small circulating grain dryer currently used is a system in which grain is discharged by a single shutter drum, and the medium-sized circulating grain dryer is a system in which grains are discharged by two or more shutter drums. It is.

  Here, a medium-sized or larger circulation grain dryer having two or more shutter drums adopts a system in which two shutter drums are driven by one drive motor in order to lower the production cost of the dryer.

  Therefore, since two or more shutter drums are rotated simultaneously (at a constant speed), only the grains in the same layer are discharged and circulated, and the moisture content deviation of the grains between the upper and lower layers does not decrease.

  Of course, the circulated grains are thrown into the drying chamber while spreading widely by the leveling machine provided at the top of the dryer, but this leveling machine only averages the moisture content deviation between the left and right layers, and the moisture content between the upper and lower layers. Not very helpful in averaging rate deviations.

Therefore, in the present invention, research and development have been conducted on the structure improvement of the shutter drum for reducing the moisture content deviation between the upper and lower layers of the grain as described above, and a method for controlling these.
Republic of Korea registered utility model No. 261058

  The present invention has been devised to meet the above-mentioned problems and development needs. The amount of hot air distributed by the heat exchanger is made uniform to maintain the average temperature, and far infrared rays are reduced. An ultra-large far-infrared circulation grain dryer using far-infrared rays, in which far-infrared radiators are provided in the central blower chamber so as to be able to irradiate more on both ends of the central blower chamber, is provided.

  Another object of the present invention is to reduce the deviation of the moisture content between the upper and lower layers of grains circulated in the ultra-large far-infrared circulation type grain dryer as described above. It is an object of the present invention to provide a structure improvement of a far-infrared circulating grain dryer operated by a processor and a grain drying method.

  In order to achieve the above object, the present invention includes a storage chamber into which grains are charged, a drying means for drying the grains in the storage chamber while moving the grains downward, and the primary dried grains to the storage chamber again. In a general circulation type grain dryer that is pulled up and re-dried, the drying means includes at least four central blower chambers having one end opened and four sides formed by mesh members, and four sides on both sides of the central blower chamber. A grain moving passage formed by a net-like member so that grains in the storage chamber pass through the lower part; a wind exhaust chamber formed such that the other end is opened outside the grain moving passage; and A blower installed on the other open end, a far-infrared radiator that is built in the central blower chamber and emits hot air while radiating far-infrared rays on both sides, and two far-infrared radiators Provided to the outside Provides a very large far-infrared circulating type grain dryer which comprises a burner and a heat exchanger for supplying hot air.

  Here, the air blower can further be provided with dust collecting means for filtering and discharging foreign matters such as dust and grain residue in the dry hot air.

  Further, the far-infrared radiator is bent such that the first radiator extending from the opened inlet side of the central blower chamber to the other end side and curved upward on the other end side of the first radiator. And a second radiator extending again to one end side of the first radiator on the other end side of the radiator plate, and at one end side of the second radiator It is desirable that a cover having a large number of exhaust holes is provided, and that the first radiator and the second radiator have a long diamond shape (substantially rhombus) in the vertical direction and have a ceramic coating applied on the surface.

  The heat exchanger has a crater neck to which a burner is attached at a lower portion thereof, and a combustion furnace shade that radially narrows toward the upper side on the upper surface. Is attached with a combustion furnace cylinder extending upward, and a distribution cylinder for evenly distributing combustion heat to both sides is attached to the upper end of the combustion furnace cylinder, and each distribution cylinder is coupled to a far-infrared radiator. It is desirable that

  Here, a first extension portion that is further extended into the heat exchanger is formed at the lower end of the combustion furnace cylinder, and a second extension portion that is further extended to the distribution cylinder is formed at the upper end of the combustion furnace cylinder. In addition, a reflective plate having a shade shape is formed on the inner upper surface of the distribution cylinder that comes into contact with the upper end of the combustion furnace cylinder, so that the supplied hot air can be uniformly distributed to both.

  Alternatively, the present invention includes a storage room in which grains having different moisture contents harvested in a large number of production areas are input, a drying room for drying while pulling down the grains in the storage room, and moving the grains in the drying room to the lower part. In order to make it possible, at least one shutter drum installed on one end side and the other end side, and a normal circulation type grain dryer that pulls the primary dried grain back into the storage room and re-drys it, A first drive motor that can independently rotate the shutter drum, a second drive motor that can independently rotate the shutter drum at the other end, a moisture sensor installed outside the storage room, and a moisture sensor And further including a processor for rotating the first drive motor and the second drive motor while changing the operation cycle when the deviation is 5% or more. Providing very large far-infrared circulating type grain dryer and features.

  Alternatively, the present invention includes a step (S1) of putting grains harvested in a large number of production areas and having different moisture contents into the storage room of the dryer, and one end side and the other end side of the dryer from the lowermost grain in the storage room A step (S2) of primary drying while simultaneously pulling down at least one shutter drum installed at a time (S3), a step of recirculating the primary dried grain to the storage room (S3), and a step (S3) In the normal circulation type grain drying method, including the step (S4) of checking the moisture of the grain dried in step) and discharging the grain when the desired moisture content is obtained, the upper and lower layers of the grain in the storage chamber Check the moisture content by the processor (S5), and if the interlayer moisture content deviation is 5% or more in the checking step (S5), use the shutter drum on one end side or the shutter drum on the other end side in the processor Providing a circulating grain drying method characterized by further comprising a step (S6) for driving the random I.

  At this time, in the step (S6), it is desirable to drive each shutter drum by a pattern determined by the program.

The pattern includes: 1) the shutter drum on one end is driven at a low speed, II) the shutter drum on the other end is driven at a high speed, and III) the shutter drums on both sides are driven in opposite directions. There is a method of repeating the types of driving sequentially for a certain time.

  As described above, the ultra-large far-infrared circulation type grain dryer using far-infrared rays according to the present invention basically uses far-infrared rays, so that the fuel cost can be reduced while obtaining the best grain quality. Since it is manufactured in an ultra-large size, a large amount of grain can be dried within a short time.

  Further, by making the distribution of the hot air generated by the heat exchanger uniform, the average temperature of the far-infrared radiator can be maintained uniformly at a specified temperature.

  Further, the moisture content deviation between the upper and lower grain layers can be minimized through the control of the shutter drum.

  Hereinafter, preferred embodiments of an ultra-large far-infrared circulating grain dryer according to the present invention will be described with reference to the accompanying drawings.

  FIG. 4 is a side view showing an embodiment of an ultra-large far-infrared circulation type grain dryer according to the present invention, and FIG. 5 shows an embodiment of an ultra-large far-infrared circulation type grain dryer according to the present invention. FIG. 6 is a front view schematically showing only the main part of one embodiment of an ultra-large far-infrared circulation type grain dryer according to the present invention, and FIG. 7 is a line AA in FIG. It is sectional drawing shown along.

  Referring to FIGS. 4 to 7, the basic configuration of the ultra-large far-infrared circulating grain dryer 100 using far-infrared rays according to the present invention is for transferring the grain introduced through the grain input hopper 110. Transfer device 112, elevator 113, upper transfer device 114, leveling machine 116, super large storage chamber 117 for storing grains, drying chamber 118 for drying the grains in the storage chamber 117, and grains by drying hot air and far infrared rays An ultra-large drying means for drying is provided.

  Here, the ultra-large storage chamber 117 is a grain storage place that can store grains of 20 tons or more at a minimum.

  The ultra-large drying means is formed in the drying chamber 118 at least four central blow chambers 120, grain movement passages 121 formed on both side surfaces of each central blow chamber 120, and outside the grain movement passage 121. A wind exhaust chamber 122, a far-infrared radiator 130, an external hot air supply unit 150, and a blower 123 are provided.

  At this time, according to the capacity of the dryer 100, when the size of the storage chamber 117 is 20 to 30 tons, four central air blowing chambers 120 are formed, and when the size of the storage chamber 117 is 30 to 40 tons, It is desirable that eight central ventilation chambers 120 are formed. Of course, when the size of the storage chamber 117 is 40 tons or more, eight or more central air blowing chambers 120 can be formed.

  The central blower chamber 120 is formed in a lateral direction below the storage chamber 117, and has a shape in which one end side is opened and the other end side is sealed. The central air blowing chamber 120 has a long diamond shape (substantially rhombus) in the vertical direction, and four walls are formed by a net-like member. Grain moving passages 121 communicating with the storage chamber 117 are formed on both side surfaces of the central air blowing chamber 120 formed in this way.

  The grain movement passage 121 is formed of a net-like member, for example, a perforated net or a perforated steel plate, like the central air blowing chamber 120. At this time, a single mesh member overlapping the central air blowing chamber 120 may be formed.

  An air exhaust chamber 122 is formed outside the grain moving passage 121 on the side opposite to the central air blowing chamber 120. That is, the hot air supplied to the central blower chamber 120 passes through the grain moving passage 121 and moves to the wind exhaust chamber 122 while drying the grain in the grain moving passage 121.

  Here, the air exhaust chamber 122 has a shape in which one end side is sealed and the other end side is opened, and plays a role of discharging dry hot air that has passed through the grain moving passage 121 to the outside. Therefore, the other open end of the exhaust air chamber 122 collects the dry hot air from the two exhaust air chambers 122 formed outside the grain moving passage 121 and discharges it by the blower 123.

  At this time, the dry hot air discharged by the blower 123 contains scattered substances such as dust and grain residue. If these are discharged into the atmosphere as they are, the air is polluted.

  Therefore, a dust collecting means 170 that filters out the scattered foreign matter can be further installed outside the blower 123. Such dust collecting means 170 will be described in detail below.

  The far-infrared radiator 130 is built in the central blower chamber 120 formed as described above.

  8 and 9 are a front view and a side view showing the far-infrared radiator and hot air supply section shown in FIG.

  As shown in FIGS. 8 and 9, the far-infrared radiator 130 has a hollow tube shape inside, and is heated by the hot air supplied from the external hot-air supply unit 150 while the far-infrared ray on the grain moving passage 121 side. And the supplied hot air is exhausted through the grain moving passage 121 to dry the grain.

  Such a far-infrared radiator 130 includes a first radiator 132 and a second radiator 134, which are arranged in a straight line with each other while being hollow, and a first radiator 132 and a second radiator. A U-shaped heat radiation plate 135 connecting the other end of the body 134 and a cover 136 formed with a number of exhaust holes 137 on one end of the second radiator 134. A ceramic paint 138 that emits far-infrared rays is applied to the surface of the two radiators 134.

  The first radiator 132 and the second radiator 134 extend from the opened one end side of the central air blowing chamber 120 to the other sealed end side. A coupling flange 131 is integrally formed on one end side of the first radiator 132.

  The first radiator 132 and the second radiator 134 are formed so as to have a long diamond shape (substantially rhombus) in the same manner as the shape of the central blower chamber 120. Designed to emit infrared light.

  Further, the heat radiating plate 135 bends at the other end side of the first radiator 132 so as to be bent toward the other end side of the second radiator 134, and the hot air flowing into the first radiator 132 is turned into the second radiator 134. For example, if a general U-shaped tube is used without installing the heat sink 135 made of STS430, the heat source is partially stagnated behind the U-shaped tube. Due to this phenomenon, a local overheating phenomenon occurs.

  The external hot air supply unit 150 includes a burner 151, a heat exchanger 152, and a hot air supply path 160. At this time, one hot air supply unit 150 is provided for each of the two central air blowing chambers 120. That is, hot air is simultaneously supplied to the two far-infrared radiators 130 by one hot-air supply unit 150.

  The burner 151 is installed at the lower part inside the heat exchanger 152, and kerosene is used as the fuel.

  The heat exchanger 152 has a substantially rectangular parallelepiped shape whose inside is sealed, and a crater neck 153 to which the burner 151 is attached is formed on the lower side of the heat exchanger 152. A combustion furnace shade 155 is formed on the upper surface of the heat exchanger 152. The combustion furnace shade 155 has a tapered shape so that it becomes thinner toward the upper side. At this time, a large number of through holes (not shown) are formed in the combustion furnace shade 155 for stable ignition when the burner 151 is ignited.

  The hot air supply path 160 has one inlet and two outlets as a connection passage for supplying hot air to the far-infrared radiator 130 by the heat exchanger 152, and uniformly distributes the hot air supplied to one inlet. It plays a role of discharging to two outlets.

  Such a hot-air supply channel 160 has a “T” shape, and is attached to the combustion furnace shade 155 and extended upward, and a distribution cylinder divided into both sides at the upper end of the combustion furnace cylinder 162. It consists of 164.

  At this time, the lower end portion and the upper end portion of the combustion furnace tube 162 are formed to further protrude in the vertical direction in order to uniformly distribute the hot air. That is, a first extension 161 is formed at the lower end of the combustion furnace tube 162 so as to protrude further downward from the upper end of the combustion furnace shade 155, and a distribution cylinder connected to the upper end of the combustion furnace tube 162 A second extension 163 is formed so as to protrude further upward from the lower end of 164.

  Here, the first extension 161 preferably has a length of 200 to 250 mm. The reason for this is that, as a result of research and experiments, if the length of the first extension 161 is less than 200 mm, sufficient vortex flow will not occur, and the amount of hot air will not be evenly distributed by the distribution cylinder 164, while the first extension This is because if the length of 161 is formed to exceed 250 mm, too many vortices will be generated and the amount of hot air will not be evenly distributed.

  It is more desirable to make the length of the first extension 161 coincide with the height of the combustion furnace shade 165. The hot air entering the combustion furnace tube 162 generates a vigorous vortex flow by the tapered combustion furnace shade 155 and the projected first extension 161, so that the first extension 161 is further connected to the lower end of the combustion furnace shade 155. This is because if the height of the first extension 161 is formed lower than the lower end of the combustion furnace shade 155, the generated vortex cannot be smoothly sucked into the combustion furnace tube 162 if the height is formed higher.

  The second extension 163 preferably has a length of 15 to 30 mm. This is because when the length of the second extension 163 is less than 15 mm, hot air is not distributed well to the left and right, and when it is formed to exceed 30 mm, hot air that has passed through the combustion furnace tube 162 is distributed. This is because a reverse discharge and a local overheating phenomenon may occur due to being in close contact with the upper end portion.

  On the other hand, a reflector 165 having a shade shape may be further formed on the upper side of the second extension part 163 for more reliable heat distribution.

  Flange 167 for connecting to flange 131 of far-infrared radiator 130 is integrally formed at both ends of distribution tube 164 of hot air supply path 160 formed in this way.

  Hereinafter, the dust collecting means 170 whose explanation has been interrupted during the above explanation will be described.

  As shown in FIGS. 4 and 5, the dust collecting means 170 has a discharge pipe 171 having a communication shape extending long upward, a whirling blade 172 formed on the inlet side which is the lower end of the discharge pipe 171, A filter plate 173 formed on the outlet side, which is the upper end of the discharge pipe 171, and a dust collection pipe 174 formed on the side surface of the filter plate 173 are provided.

  Here, the whirling generation blade 172 generates the whirling while passing the dry hot air discharged from the blower 123 as the word says. Such a whirling blade 172 has a propeller shape, and, if briefly explained, has a shape similar to that of a rotating blade that generates wind with a fan. Since such a whirling blade 172 is fixed inside the inlet of the discharge pipe 171, the hot air passing through the whirling blade 172 rises while swirling spirally after passing. At this time, foreign matters such as dust contained in the dry hot air rise while rotating around the outside, that is, along the inner wall of the discharge pipe 171 by centrifugal force.

  The filter plate 173 formed on the upper outlet side of the discharge pipe 171 has an inner diameter smaller than the inner diameter of the discharge pipe 171 and has the same shape as the first extension 161 in the heat exchanger 152 described above. Yes. That is, foreign matter existing outside the dry hot air rising like a whirlwind is filtered by the filter plate 173.

  The dust collection tube 174 is formed on one side surface of the filter plate 173, and the foreign matter on the filter plate 173 escapes through the dust collection tube 174 while it is spiraling along the inner wall of the discharge tube 171. It will be like that. Desirably, the dust collection pipe 174 may be formed to extend in the tangential direction of the discharge pipe 171. This is because foreign matter applied between the discharge pipe 171 and the filter plate 173 continuously spirals due to the centrifugal force generated from the lower part, but seems to be discharged to the dust collection pipe 174 while rotating in this rotational direction. Therefore, the dust collection tube 174 is formed in the tangential direction.

  Since the foreign matter discharged to the dust collection pipe 174 is discharged together with a part of the dry hot air as described above, a filter screen (not shown) for filtering only the foreign matter is provided at the end of the dust collection pipe 174. It is desirable to provide something.

  Hereinafter, the structure and control method of the shutter drum 180 for averaging the deviation of the moisture content between the upper and lower grain layers in the storage chamber 117 will be described.

  FIG. 10 is a schematic diagram showing a driving structure of the shutter drum shown in FIG. 5, and FIG. 11 is a schematic diagram showing a temporary state when the grain in the storage chamber is discharged to the lower part by the control of the shutter drum. FIG. 12 is a block diagram illustrating a circulating grain drying method according to the present invention.

  First, as shown in FIG. 10, the shutter drum 180 is installed in the lower part of the central air blowing chamber 120 and plays a role of guiding the grain passing through the grain moving passage 121 to the lower transfer device 112. Since such shutter drums 180 are formed to have almost the same number as the central air blowing chamber 120, at least two or more are installed symmetrically. At this time, a sprocket (not shown) is attached to one end of each shutter drum 180.

  At this time, each sprocket is connected to a drive motor 182, and one drive motor 182 is provided for both. Each drive motor 182 is mounted with a sprocket (not shown), similar to the shutter drum 180, and connected to the sprocket 181 and the chain 183 of the shutter drum 180.

  For example, when four shutter drums 180 are formed, one first drive motor 182a and a first shutter drum 180a in contact with the first drive motor 182a are connected by a chain 183a, and the first shutter drum 180a The second shutter drum 180b is connected by a chain 184a. The fourth shutter drum 180d and the third shutter drum 180C are connected by the chain 184b while the other second drive motor 182b and the fourth shutter drum 180d in contact with the second drive motor 182b are connected by the chain 183b. Is done.

  Therefore, if the operations of the first drive motor 182a and the second drive motor 180b are made different, the grains between the upper layer and the lower layer in the storage chamber 117 can be mixed with each other.

  The control method for mixing the upper and lower interlayer grains as described above can be controlled by a processor program according to a predetermined pattern.

  Here, in order to check the moisture content of the grain that has passed through the storage chamber 117, a moisture sensor (not shown) must be provided.

  That is, the moisture content obtained by each moisture sensor is compared, and when the moisture content deviation is large, one of various patterns determined according to the width of the deviation is executed, for example, the interlayer moisture content deviation is minimized. When it is 5% or more, the first drive motor 182a is driven at a low speed, the second drive motor 182b is driven at a high speed for a certain time, the first drive motor 182a is driven at a high speed, and the second drive motor 182b is driven at a low speed. It works with.

  When the first drive motor 182a and the second drive motor 182b operate at different speeds as described above, the grain in the storage chamber 117 is discharged in an oblique direction as shown in FIG. The rate deviation decreases.

  Here, there are various patterns input to the processor, but the operation of driving the first drive motor and the second drive motor at different speeds for a predetermined time is repeated.

  For example, the drive pattern is the first pattern: the first drive motor is driven for 1 hour at a feed rate of 2.0 times / min, the second drive motor is driven for 1 hour at a feed rate of 4.0 times / min. The drive motor is driven for 1 hour at a feed rate of 4.0 times / min, the second drive motor is driven for 1 hour at a feed rate of 2.0 times / min ==> The first and second drive motors rotate simultaneously (constant speed) , And.

  There are various drive patterns that can be considered from the operation procedure, such as which of the first drive motor, the second drive motor, or the first and second drive motors is driven first and what happens next. Such combinations can be input in advance, and the pattern type can be controlled to be selected according to the deviation of the interlayer moisture content.

  The overall flow of the ultra-large far-infrared circulating grain dryer 100 using far-infrared rays according to the present invention will be briefly described below.

  Referring to FIG. 12, first, cereals harvested in a large number (two or more) of production areas, each having a different moisture content, are input through the input port 110.

  The grains put into the inlet 110 are put on the elevator 113 by the transfer device 112 and are raised to the upper part of the dryer 100, and are moved to the upper center of the dryer 100 by the upper transfer device 114.

  Grains transferred by the upper transfer device 114 fall into the storage chamber 117, but at this time, they are dropped uniformly by the leveling machine 116 so that the left and right are mixed while spreading in all directions.

  Grain accumulated in the storage chamber 117 enters the grain movement passage 121 formed in the lower part of the storage chamber 117 and passes through the grain movement passage 121 to dry 0.8 to 1.0% per hour by far infrared rays and hot air. Dried at a reduced rate.

  Grains that have passed through the grain movement passage 121 fall to the lower part by the respective shutter drums 180.

  Here, the shutter drum 180 has a tube shape, and an incision groove (not shown) cut in the length direction of the shutter drum 180 is formed on one end side, and the shutter drum 180 is incised while rotating. The grain in the grain moving passage 121 that comes into contact with the groove is selectively received and dropped to the lower part.

  Grain that has fallen to the lower part by the shutter drum 180 is moved again to the elevator 113 side by the transfer device 112, is put on the elevator 113, and goes up to the upper part of the dryer 100 for circulation.

  Here, when the dried cereal is put on the elevator 113, the current moisture content will be checked, but when the dried cereal has an appropriate moisture content, The other outlet 115 is opened and discharged without being moved to the transfer device 114.

  On the other hand, in the operation of the drying means, the burner 151 is first ignited and a flame is injected into the heat exchanger 152. The injected flame rises to the upper combustion furnace shade 155 in the heat exchanger 152 and generates a vortex between the combustion furnace shade 155 and the first extension 161, and the generated eddy hot air enters the combustion furnace tube 162. To do.

  The hot air that has passed through the combustion furnace tube 162 is distributed to both sides by the distribution tube 164 while being discharged through the second extension 163. At this time, the hot air is divided into two by the reflector 165, and the divided hot air enters the far-infrared radiator 130 along the distribution cylinder 164.

  The hot air entering the far-infrared radiator 130 heats the first radiator 132 and the second radiator 134 while passing through the first radiator 132 and the second radiator 134, and the ceramic paint 138 applied to the surface thereof. It emits far infrared rays. The far-infrared rays pass through the mesh members that form both side walls of the central air blowing chamber 120, and are irradiated to the grain moving passage 121 outside thereof to dry the descending grains.

  Further, the hot air that has entered the far-infrared radiator 130 flows into the central blower chamber 120 through the exhaust hole 137 of the cover 136 formed at the end of the second radiator 134, and flows into the central blower chamber 120. The hot air flows into the grain moving passage 121 again, dries the descending grain, and exits into the exhaust chamber 122.

  The dry hot air that has escaped into the exhaust chamber 122 is discharged to the outside by the blower 123, and the dry hot air discharged to the outside through the blower 123 is discharged into the atmosphere after foreign matter is filtered by the dust collecting means 170.

  The ultra-large far-infrared circulation type grain dryer 100 according to the present invention requires about one hour in a cycle in which the grains in the storage chamber 117 are circulated once. In comparison, the shutter drum 180 is controlled.

  That is, the moisture content between layers was checked by a plurality of moisture sensors installed in each layer in the storage chamber 117, and the deviation of the moisture content was calculated by the processor. When the moisture content deviation was 3% or more, it was input in advance. The first drive motor 182a and the second drive motor 182b are controlled according to the pattern.

  Although the foregoing has been described with reference to the preferred embodiments of the present invention, those skilled in the art will be able to variously modify the present invention without departing from the spirit and scope of the invention as defined in the claims. It can be understood that changes can be made.

It is front sectional drawing which shows schematically the inside of the circulation type grain dryer with which the far-infrared radiator concerning the prior art was mounted | worn. It is side surface sectional drawing which shows schematically the inside of the circulation type grain dryer to which the far-infrared radiator concerning the prior art shown in FIG. 1 was mounted | worn. FIG. 2 is a perspective view showing the far-infrared radiator shown in FIG. It is a side view which shows one Example of the super-large far-infrared circulation type grain dryer concerning this invention (a partial cross section is included). It is a front view which shows one Example of the super-large far-infrared circulation type grain dryer concerning this invention. It is front sectional drawing which shows roughly only the principal part of the ultra-large far-infrared circulation type grain dryer concerning this invention. FIG. 7 is a plan sectional view taken along line AA in FIG. FIG. 5 is a side view showing the far-infrared radiator and hot air supply unit shown in FIG. FIG. 5 is a front view showing the far-infrared radiator and hot air supply unit shown in FIG. FIG. 6 is a schematic diagram showing a driving structure of the shutter drum shown in FIG. It is the schematic which shows a mode that the grain in a storage chamber is discharged | emitted below by control of a shutter drum. It is a block diagram which shows one Example of the far-infrared circulation type grain drying method concerning this invention.

Explanation of symbols

100 Super large far infrared circulation grain dryer
110 Input gate (input)
112 Transfer device
113 elevator
114 Upper transfer device
115 Packaging line
116 Equalizer
117 Storage room
118 Drying room
120 Central ventilation chamber
121 Grain passage
122 Ventilation chamber
123 Blower
130 Far-infrared emitter
132, 134 radiator
137 Exhaust hole
138 Ceramic paint
150 Hot air supply section
151 burner
152 heat exchanger
155 Combustion furnace cap
160 Hot air supply path
162 Combustion furnace
161 First Extension
163 Second extension
164 distribution cylinder
165 reflector
170 Dust collection means
171 discharge pipe
172 Whirlwind generator
173 Filter plate
174 Dust collection tube
180 Shutter drum
182 drive motor
185 chain

Claims (9)

A circulation type grain comprising a storage room into which grain is put, and a drying means for drying the grain while moving the grain in the storage room to a lower part, wherein the grain which has been primarily dried is brought back to the storage room and re-dried. In the dryer
The drying means includes at least two central air blow chambers having four sides formed by a mesh member and open at one end, and four sides formed by a mesh member and provided on both sides of the respective central fan chambers. In addition, a grain moving passage in which the grain in the storage chamber moves to the lower part, a wind exhaust chamber formed so that the other end side is opened outside the grain moving passage, and the other end where the exhaust chamber is opened A blower installed on the side, a far-infrared radiator that discharges hot air while radiating far-infrared rays on both sides of the blower, and one outside of the two far-infrared radiators. Comprising a provided burner and a heat exchanger for supplying hot air;
The far-infrared radiator is bent so as to be curved upward on the other end side of the first radiator and the first radiator extending from the open inlet side of the central air blowing chamber to the other end side. A U-shaped radiator plate, a second radiator extending from the other end side of the radiator plate to one end side of the first radiator, and a plurality of exhaust holes are formed on one end side of the second radiator. The first radiator and the second radiator have a long diamond shape and are coated with a ceramic coating on the surface. Machine.   In the heat exchanger, a crater neck to which a burner is attached is formed at a lower portion thereof, and a combustion furnace shade that narrows in a funnel shape is formed on the upper surface, and the upper portion is formed on the combustion furnace shade. A combustion furnace cylinder extending to the top of the combustion furnace cylinder, and a distribution cylinder for evenly distributing combustion heat to both sides is attached to the upper end of the combustion furnace cylinder, and the respective distribution cylinders are coupled to the far-infrared radiator. 2. The ultra-large far-infrared recirculating grain dryer using far-infrared rays according to claim 1, wherein   A first extension that is further extended into the heat exchanger is formed at the lower end of the combustion furnace cylinder, and a second extension that is further extended to the distribution cylinder is formed at the upper end of the combustion furnace cylinder. The ultra-large far-infrared circulation type grain dryer using far-infrared rays according to claim 2, characterized in that.   3. The ultra-large far-infrared ray using far-infrared rays according to claim 2, wherein a reflector having a shade shape is formed on an inner upper surface of the distribution cylinder that contacts an upper end of the combustion furnace cylinder. Circulating grain dryer.   3. The ultra-large far-infrared circulating grain dryer using far-infrared rays according to claim 2, wherein a plurality of through holes are formed in the combustion furnace shade. A storage room into which grains with different moisture contents harvested in a large number of production areas are input, a drying room for drying while pulling down the grains in the storage room, and one end for moving the grains in the drying room to the lower part A circulating grain dryer comprising at least one or more shutter drums installed on the side and the other end side, wherein the primary dried grain is again pulled up to the storage chamber and re-dried;
A first drive motor and a second drive motor that rotate the shutter drum at a low speed or a high speed, a plurality of moisture sensors arranged in layers in the storage chamber with a vertical interval, and a deviation of the moisture sensor is 5 A processor that drives the first drive motor and the second drive motor to rotate at different speeds when the percentage is greater than or equal to
An ultra-large far-infrared circulating grain dryer characterized by further comprising: A step (S1) of putting grains harvested in various production areas and having different moisture contents into the storage room of the dryer, and at least one shutter drum installed at one end and the other end of the dryer. In the step (S2) of primary drying while moving the lowermost grain of the lower layer simultaneously to the lower part (S2), the step of moving the primary dried grain again to the storage chamber (S3), and the step (S3) In a normal circulation type grain drying method comprising: checking the moisture of the dried grain and discharging the grain when a desired moisture content is obtained (S4);
A step (S5) of checking the moisture content of the upper and lower interlayers of the grains in the storage chamber by a processor, and when the interlayer moisture content deviation is 5% or more in the checking step (S5), A step of randomly driving the shutter drum on the other end side by the processor (S6);
A circulating grain drying method, further comprising:   8. The circulating grain drying method according to claim 7, wherein, in the step (S6), each shutter drum is driven by the processor according to a pattern inputted in advance. The pattern is
(I) The shutter drum on the one end side is driven at a low speed and the shutter drum on the other end side is driven at a high speed.
(II) driving the shutter drum on one end side at a high speed and driving the shutter drum on the other end side at a low speed;
(III) The shutter drums on both sides are driven at the same speed,
9. The circulating grain drying method according to claim 8, wherein one of patterns obtained by combining the three driving methods is sequentially repeated for a predetermined time.

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