JP2008298371A - Grain drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a grain drier capable of suppressing unnecessary increase in a flow rate of air introduced to inside of a burner. <P>SOLUTION: In this grain drier, a plurality of through holes 82 are formed on a vertical wall part 78A provided on one end side of a far-infrared ray radiator 78. Due to this structure, when air inside the far-infrared ray radiator 78 is sucked from an opening part on the other side of the far-infrared ray radiator 78, air (outside air) is flowed in to inside of the far-infrared ray radiator 78 via the plurality of through holes 82. Therefore, even when an opening part on one side of the far-infrared ray radiator 78 is closed by the burner 66, unnecessary increase, by the suction, in a flow rate of air (primary combustion air) introduced from an intake port 69 of the burner 66 to inside of the burner 66 and discharged to inside of the far-infrared ray radiator 78 can be suppressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a grain drying apparatus.

  In a conventional grain drying apparatus (see, for example, Patent Document 1), a machine body in which a grain storage unit (a grain flow path) for storing grains is provided, and air in the machine body is discharged to the outside of the machine body. A wind blower that allows outside air to flow in and generates an air flow that passes through the grain container in the machine body, and a far infrared ray that is formed in a cylindrical shape and provided in the machine body on the upstream side of the air flow with respect to the grain container part A radiator and a burner attached to the far-infrared radiator in a state in which the opening on one end side of the far-infrared radiator is closed, and burns fuel by air introduced therein to emit a flame into the far-infrared radiator. I have.

In the grain drying apparatus configured as described above, the outside air that has flowed into the machine body is heated by the far-infrared radiator heated by the flame radiated by the burner, and is heated by the flame to open the other end side of the far-infrared radiator. It is mixed with hot air discharged from the section and heated to a predetermined temperature. The heated air flow passes through a grain container provided on the downstream side of the far-infrared radiator and absorbs the moisture of the grain, and is then discharged to the outside of the machine body by an air blower.
JP 2001-165570 A

  However, in the grain drying apparatus having the above-described configuration, when the exhaust fan discharges air inside the machine body to the outside, the machine body becomes negative pressure, so that the air inside the far-infrared radiator passes through the other end side opening of the far-infrared radiator. May be aspirated. In such a case, since the one end side opening part of the far-infrared radiator is closed by the burner, the flow rate of the air flowing into the far-infrared radiator through the inside of the burner increases. For this reason, the air-fuel ratio of the burner is changed, combustion becomes unstable, and dust contained in the air adheres to the components inside the burner (for example, a flame detector, a fuel injection nozzle, a spark plug, etc.). It may interfere with the operation of the burner.

  An object of the present invention is to obtain a grain drying apparatus that can prevent the flow rate of air introduced into a burner from being unnecessarily increased in consideration of the above facts.

  The grain drying apparatus according to the first aspect of the present invention is a machine body in which a grain container for housing grains is provided, and the outside air is allowed to flow into the machine body by discharging the air in the machine body to the outside. A wind exhaust means for generating an air flow that passes through the grain storage unit in the machine body, and is formed in a cylindrical shape, and is provided in the machine body on the upstream side of the air flow with respect to the grain storage unit, A far-infrared radiator having a through-hole formed on one end thereof, and attached to the far-infrared radiator in a state where the one-end opening of the far-infrared radiator is closed; And a burner that radiates a flame into the far infrared radiation body.

  In the grain drying apparatus according to claim 1, the outside air that has flowed into the machine body is heated by the far-infrared radiator heated by the flame radiated from the burner and discharged from the other-end opening of the far-infrared radiator. Mixed with hot air to be heated. The heated air passes through the grain container provided on the downstream side of the far-infrared radiator, absorbs the moisture of the grain, and is then discharged to the outside of the machine body by the wind exhausting means.

  Here, a through hole is formed at one end of the far-infrared radiator. For this reason, when the air exhaust means exhausts the air in the airframe, the airframe becomes negative pressure, and when the air in the far-infrared radiator is sucked from the other-end opening of the far-infrared radiator, Air flows into the far-infrared radiator through the through hole. Therefore, even if the opening on one end side of the far-infrared radiator is blocked by the burner, the flow rate of air (primary combustion air) introduced into the burner and discharged into the far-infrared radiator is not required by the suction. The increase can be suppressed.

  The grain drying apparatus according to a second aspect of the present invention is the grain drying apparatus according to the first aspect, wherein the outer wall of the machine body is provided with an outside air inflow hole for allowing outside air to flow into the machine body. The far-infrared radiator can be visually recognized from the outside of the airframe through the outside air inflow hole and the through hole.

  In the grain drying apparatus according to the second aspect, the far-infrared radiation body can be visually recognized through the through hole by looking into the inside of the machine body from the outside air inflow hole. Therefore, the combustion state (flame state) of the burner can be confirmed.

  As described above, in the grain drying apparatus according to the present invention, it is possible to suppress an unnecessary increase in the flow rate of air introduced into the burner.

  FIG. 1 shows a longitudinal sectional view of a grain far-infrared drying apparatus 10 as a grain drying apparatus according to an embodiment of the present invention. 2 is a longitudinal sectional view taken along line 2-2 in FIG. 1, and FIG. 3 is a transverse sectional view taken along line 3-3 in FIG.

  The airframe 12 is an outer frame of the grain far-infrared drying apparatus 10 provided with a pair of left and right side walls 14, a front wall 16, a rear wall 18, a ceiling wall 20, and a bottom wall 22, and has a box shape that is vertically high and long in the front and rear directions. .

  The upper inner cave of the machine body 12 is a cereal tank 24 that constitutes a grain container. A drying unit 26 is disposed at the lower part of the body 12. In the drying section 26, a pair of air-permeable exhaust passage bulkheads 28 that incline and descend from the inner surface of the vertical center of the left and right machine walls 14 toward the central portion in the horizontal direction are funnel-shaped in front view (FIG. 2). And spanned in the longitudinal direction of the machine body (between the front wall 16 and the rear wall 18). An exhaust path 32 is formed between the exhaust path partition wall 28 and the side wall 14.

  A pair of air permeable air guide bulkheads 34 that are parallel to the exhaust path bulkhead 28, that is, inclined with respect to the side wall 14, are located on the side of the airflow path bulkhead 28 in the same manner as the airflow path bulkhead 28. It is stretched across the front and rear. The upper part of the air guide partition 34 is bent toward the inside of the machine body, and the upper ends are continuously connected to each other. For this reason, the part surrounded by the air guide partition 34 which opposes becomes the rhombus-shaped air guide path 38 in front view.

  Between the upper part of the exhaust path partition wall 28 and the upper part of the wind guide path partition wall 34, a gas-permeable partition wall 40 having a rhombus shape is disposed in the same manner as the air guide path 38, and the auxiliary wind guide path is formed by the partition wall 40. 42 is configured.

  Between the air guide path 38 and the auxiliary air guide path 42, between the auxiliary air guide path 42 and the exhaust air path 32, and between the air guide path 38 and the air exhaust path 32, together with the grain tank 24, a grain container. The grain in the grain tank 24 flows down the grain flow path 46 by operating a shutter drum 50 described later.

  One end of the exhaust path partition wall 28 and the air guide path partition wall 34 is connected to the front wall 16 as shown in FIG. On the front wall 16, an outside air introduction port 30 is formed, and an air guide duct 36 constituting the outer wall of the airframe 12 is attached, and an air guide communication path 64 communicating with the air guide path 38 is provided. The air guide duct 36 has an opening at the lower end, and a slit-like outside air inflow hole 44 is formed on the front surface so that outside air can flow in. For this reason, outside air is sent into the air guide path 38 from the outside air inlet 30 through the air guide communication passage 64.

  A far-infrared radiator 78 is disposed in the air guide path 38. The far-infrared radiator 78 is formed in a cylindrical shape and is bent in a U shape as a whole, and both end portions provided on the opposite side to the bent portion are disposed in the vicinity of the air guide communication path 64. In this state, it extends along the front-rear direction of the body 12.

  As shown in FIG. 4, at one end of the far-infrared radiator 78, a ring-shaped vertical wall 78A extending radially inward, and a radially inner end of the vertical wall 78A A cylindrical small-diameter portion 78B extending toward the front side of the airframe 12 (the wind guide communication passage 64 side) is provided, and one end portion of the far-infrared radiator 78 is reduced in a stepped shape. . Further, a ring-shaped flange portion 78C extends outward from the distal end portion of the small diameter portion 78B, and a burner 66 as a dry air generating means is fixed to the flange portion 78C.

  The burner 66 is a so-called gun type burner, and the periphery of the fuel injection nozzle 88 is covered with a draft tube 74, and a frame holder (flame holder) 90 is provided at the tip of the draft tube 74. It has become. The burner 66 is attached to the far-infrared radiator 78 with the draft tube 74 fitted inside the small-diameter portion 78B, and one end side opening 78D (inside the small-diameter portion 78B) of the far-infrared radiator 78. It is blocked by a burner 66.

  The main body portion 67 of the burner 66 is disposed in the air guide communication path 64 and is covered with a windproof cover 76 fixed to the flange portion 78 </ b> C of the far-infrared radiator 78. The windproof cover 76 is open at the bottom, and the opening is opposed to the lower end opening of the wind guide duct 36.

  A plurality of air inlets 69 are formed in the main body 67 of the burner 66, and when a fan (not shown) provided inside the main body 67 is activated, air is introduced into the main body 67 through these air inlets 69. Has been introduced. In this case, inflow of air from the external airflow inlet 44 to the burner 66 is blocked by the windproof cover 76, and air from the lower end opening of the air guide duct 36 is introduced into the burner 66. Yes.

  The air introduced into the burner 66 is mixed with the liquid fuel injected from the fuel injection nozzle 88 and discharged into the far-infrared radiator 78. The air-fuel mixture is ignited and burned by a spark generated by a spark plug 89 provided in the draft tube 74. As a result, the burner 66 emits a flame into the far-infrared radiator 78.

  Further, the burner 66 is provided with a flame detector 91 (for example, a CdS sensor) that detects a flame. The flame detector 91 is connected to a control device (not shown) via a wiring (not shown). When the flame detector 91 detects an abnormality in the combustion state of the burner 66, the operation of the burner 66 is performed by the control device. Is to be stopped.

  Here, in the present embodiment, a plurality of circular through holes 82 are formed in the vertical wall portion 78 </ b> A of the far-infrared radiator 78. These through-holes 82 are arranged at equal intervals along the circumferential direction of the far-infrared radiator 78, and the inside of the far-infrared radiator 78 and the air guide communication path 64 are connected via these through-holes 82. Communicate.

  Further, all or a part of these through holes 82 are arranged to face the external airflow inlet 44 of the air guide duct 36, and the inside of the air guide duct 36 (the inside of the airframe 12) from the external airflow inlet 44. , The inside of the far-infrared radiator 78 can be visually recognized through the through hole 82. Therefore, for example, if the combustion state of the burner 66 is good, the inside of the draft tube 74 looks flame-colored through the through-hole 82, whereby the combustion state of the burner 66 can be confirmed. .

  In the present embodiment, some of the plurality of through holes 82 disposed above the small diameter portion 78B are disposed between the flame radiated by the burner 66 and the external air flow inlet 44 of the air guide duct 36. ing. For this reason, the flame can be directly visually recognized through the through hole 82 by looking into the inside of the air guide duct 36 from the outside air inflow hole 44.

  On the other hand, the other end side opening 78E of the far-infrared radiator 78 is disposed above the one end side opening 78D. The other end side opening 78E (hereinafter referred to as the exhaust port 78E) is located at a position close to the substantially central portion of the outside air introduction port 30 formed in the front wall 16 and in the outside air introduction direction from the outside air introduction port 30. The hot air generated by the burner 66 is disposed in the opposite direction (that is, toward the outside air introduction port 30), and the far-infrared radiator 78 is heated and the air is introduced into the air guide path 38 from the exhaust port 78E. And is to be released.

  On the other hand, the other ends of the above-described exhaust path partition wall 28 and the air guide path partition wall 34 are connected to the rear wall 18. For this reason, the wind guide path 38 and the grain downflow path 46 are shielded at the end on the rear side of the machine body. Therefore, the dry wind fed to the air guide path 38 is sent to the grain downflow path 46 and then discharged to the air exhaust path 32. At this time, the grain in the grain flow path 46 is dried by flowing down to the grain flow path 46 while receiving the drying wind sent from the air guide path 38.

  As shown in FIG. 3, an opening 84 is formed in the rear wall 18 facing the exhaust passage 32 and an exhaust duct 86 is attached. The exhaust duct 32 and the rear wall 18 form the exhaust passage 32. An exhaust air communication path 68 communicating with the air is formed.

  In addition, a suction exhaust device 70 as an exhaust device is disposed at the center of the exhaust communication passage 68. For this reason, when the suction exhaust fan 70 is operated, the dry air generated by the burner 66 is supplied from the air guide path 38 to the exhaust path 32 and is discharged to the outside of the machine body 12 through the exhaust air communication path 68.

  That is, in the grain far-infrared drying apparatus 10, the air in the machine body 12 is discharged to the outside by the suction exhaust fan 70, so that the outside air flows into the machine body 12 from the external airflow inlet 44, and the grain flow path into the machine body 12. In addition to generating an air flow passing through 46 (cereal container) and disposing a far-infrared radiator 78 and a burner 66 upstream of the air flow with respect to the grain flow down 46, the grain flow down 46 is dried. It is configured to supply wind (heated air flow).

  On the other hand, each lower end of the grain flow path 46 is connected to the shutter drum 50 via an outlet 48 formed between the exhaust path partition wall 28 and the air guide path partition wall 34.

  The shutter drum 50 has a hollow cylindrical shape whose axis is horizontal, and a slit-shaped notch along the axial direction with a predetermined width dimension is formed in a part of the outer periphery. The shutter drum 50 rotates about its axis so that the notch and the outlet 48 face each other, so that the grain in the grain flow path 46 flows into the shutter drum 50 through the notch, and the shutter drum 50 further rotates. Then, the inflowing grain is discharged when the notch is positioned downward.

  Below the shutter drum 50, a pair of tension flow plates 52 that are tapered downward toward the central portion between the side walls 14 are disposed. Further, a tension hopper 53 is disposed at the lower part of the machine wall 14 so that grains can be tensioned into the machine body 12. For this reason, the grain discharged from the shutter drum 50 and the grain stretched from the stretch hopper 53 are conveyed to the substantially central portion between the side walls 14 by the stretch flow plate 52.

  A lower screw conveyor 54 for conveying the grain is disposed at each lower end of the tension flow plate 52. The lower screw conveyor 54 is disposed along the longitudinal direction of the grain far-infrared drying apparatus 10, and feeds the grain entering between the outer peripheral spiral blades toward the front wall 16 side.

  An elevator 56 is erected on the outside of the front wall 16 so as to receive the grain conveyed by being connected to the lower screw conveyor 54. Grain conveying buckets 57 are attached to the endless belt at regular intervals in the elevator 56, and the grains fed from the lower screw conveyor 54 and accumulated at the lower end are lifted and conveyed to the top of the grain far-infrared dryer 10. It can be done.

  One end of the upper screw conveyor 58 corresponds to the upper end portion of the elevator 56 and can receive the lifted and conveyed grain. The other end of the upper screw conveyor 58 is extended to the center in the longitudinal direction of the grain far-infrared drying apparatus 10, and a rotary equalizing machine 60 having a vertical axis is disposed immediately below the other end of the upper screw conveyor 58. Yes. Accordingly, the grain conveyed to the upper central portion of the grain far-infrared dryer 10 by the upper screw conveyor 58 falls onto the rotary sorter 60, and the grain tank in the machine body 12 by centrifugal force when the rotary sorter 60 rotates. Evenly distributed to 24.

  A grain outlet 72 is provided below one end of the upper screw conveyor 58 so that the grain after drying can be taken out of the machine body 12.

  Next, the operation of this embodiment will be described.

  In the grain far-infrared drying apparatus 10 having the above-described configuration, when a grain is stretched, first, the circulation system devices (the lower screw conveyor 54, the elevator 56, the upper screw conveyor 58, and the rotary equalizer 60) are driven. Then, the tension hopper 53 on the lower side surface of the machine body 12 is opened, and the grain is stretched into the machine body 12. The stretched grain is guided by the stretch flow plate 52 and conveyed to the position where the lower screw conveyor 54 is disposed. The conveyed grain is sequentially conveyed to the elevator 56 side by the lower screw conveyor 54, and is further lifted and conveyed by the bucket 57 of the rotating elevator 56 that rotates.

  Grains lifted and conveyed above the machine body 12 by the elevator 56 are sent to the upper central part of the machine body 12 by the upper screw conveyor 58 and stored in the grain tank 24 in the machine body by the rotary equalizing machine 60.

  Further, here, after completion of the tensioning, the shutter drum 50 is rotated to feed out the grains. At the same time, when the burner 66 connected to the machine body 12 is ignited and the suction exhaust fan 70 is driven, the outside air is sent from the outside air introduction port 30 to the air guide path 38 through the air guide communication passage 64.

  The outside air sent to the air guide path 38 is heated by the far-infrared radiator 78 heated by the burner 66 and mixed with hot air generated by the burner 66 and emitted from the exhaust port 78E of the far-infrared radiator 78. Thus, dry air (hot air) having a predetermined temperature is generated. The dry air generated in the air guide path 38 passes through the air guide partition wall 34 and is directly supplied to the grains in the grain flow down path 46. The dry air after absorbing the moisture of the grain passes through the exhaust path partition wall 28, reaches the exhaust air communication path 68 through the exhaust path 32, and is discharged out of the grain far infrared drying apparatus 10. Further, a part of the drying air sent into the air guide passage 38 passes through the air guide partition wall 34 and is supplied to the grains in the grain downflow passage 46 to absorb the moisture of the grain, and then passes through the partition wall 40. It reaches the auxiliary air guide path 42 and is discharged from the exhaust air communication path 68.

  At the same time, far-infrared rays are radiated from the far-infrared radiator 78 in the air guide path 38 to the grain flow down path 46. Therefore, the grain is dried by being exposed to the drying wind and far infrared rays while flowing down the grain flow path 46.

  On the other hand, the grain in the grain flow path 46 passes through the outlet 48 by the rotation of the shutter drum 50 and is again guided and conveyed by the tension flow plate 52. The transported grain is repeated in the airframe 12 as necessary until the desired moisture content is reached. The transported grain is lifted and transported again by the elevator 56 and then taken out from the grain outlet 72.

  Here, in the present embodiment, a plurality of through holes 82 are formed in the vertical wall portion 78 </ b> A provided on one end side of the far-infrared radiator 78. For this reason, when the suction exhaust fan 70 discharges the air in the airframe 12, the inside of the airframe 12 becomes negative pressure, and when the air in the far-infrared radiator 78 is sucked from the exhaust port 78E, a plurality of penetrations Air (outside air) flows into the far-infrared radiator 78 through the hole 82. Therefore, even if the opening on the one end side of the far-infrared radiator 78 is blocked by the burner 66, the air (primary air) is introduced into the burner 66 from the intake port 69 of the burner 66 and discharged into the far-infrared radiator 78. It is possible to suppress an unnecessary increase in the flow rate of the combustion air).

  Therefore, in the present embodiment, the air-fuel ratio of the burner 66 can be kept constant, so that the combustion of the burner 66 can be stabilized. Further, since dust contained in the air is prevented from adhering to the components inside the burner 66 (flame detector 91, fuel injection nozzle 88, spark plug 89, etc.), the burner 66 may be mistakenly caused by the adhesion of the dust. The operation can be prevented or suppressed.

  Moreover, in the present embodiment, in a state where the burner 66 radiates a flame, some of the plurality of through holes 82 arranged above the small diameter portion 78B are the external air flow inlets of the flame and the air guide duct 36. 44. For this reason, by looking into the inside of the air guide duct 36 from the outside air inflow hole 44, the flame can be directly visually recognized, and thereby the combustion state of the burner 66 can be confirmed. That is, it is possible to confirm the ignition (ignition) state of the burner 66, the strength of the subsequent combustion, the suitability thereof, and the like.

  Therefore, it can be ensured at any time whether or not the operation of the grain far-infrared drying apparatus 10 can be continued as it is. Moreover, since it is not a configuration using a special sensor or the like, the structure is simple and can be realized at low cost.

  In the present embodiment, since the plurality of through holes 82 are formed in the vertical wall portion 78A of the far-infrared radiator 78 as described above, light from the outside of the machine body 12 passes through the through holes 82 and the external airflow inlet 44. However, since the burner 66 is covered with the windproof cover 76, it is possible to prevent light from the outside of the machine body 12 from entering the burner 66. Therefore, it is possible to prevent the flame detector 91 provided in the burner 66 from malfunctioning due to light from the outside of the machine body 12 (misidentifying the light as flame).

  Furthermore, in this embodiment, since the outside air (secondary combustion air) flows into the far-infrared radiator 78 through the plurality of through holes 82, unburned components that could not be burned in the primary combustion are removed from the secondary combustion. It can be mixed with air and reburned. Therefore, high combustion efficiency can be realized and exhaust gas can be cleaned.

  In addition, a plurality of through holes 82 are arranged side by side in the circumferential direction of the far-infrared radiator 78 on the vertical wall portion 78A of the far-infrared radiator 78 (around the flame outlet of the burner 66). For this reason, since the secondary combustion air can be uniformly supplied around the flame radiated by the burner 66, the secondary combustion can be effectively promoted.

  In the grain far-infrared drying apparatus 10 according to the above-described embodiment, the far-infrared radiator 78 has a plurality of circular through-holes 82. However, the present invention is not limited to this, and the number and shape of the through-holes are appropriately determined. Can be changed.

  In the grain far-infrared drying apparatus 10 according to the above embodiment, the through hole 82 is formed in the vertical wall portion 78A of the far infrared radiator 78. However, the present invention is not limited to this, and the through hole emits far infrared radiation. It may be formed on one end side (the side on which the burner is attached) of the body 78, and may be formed on the outer peripheral wall on one end side of the far-infrared radiator 78.

  Furthermore, in the grain far-infrared drying apparatus 10 according to the above-described embodiment, the outside air inflow hole 44 provided in the air guide duct 36 is formed in a slit shape. You may comprise so that it may form in mesh shape and the inside of the air guide duct 36 may be easily peeped.

It is a longitudinal cross-sectional view of the grain far infrared rays drying apparatus which concerns on embodiment of this invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. It is sectional drawing which shows the structure of the burner which is a structural member of the grain far-infrared drying apparatus shown by FIG. 1, and peripheral components.

Explanation of symbols

10 Grain dryer 12 Airframe 46 Grain flow down (grain storage)
44 Outside air inflow hole 66 Burner 78 Far-infrared radiator 78D One end side opening 82 Through hole

Claims (2)

A fuselage containing a grain storage unit for storing grain;
Air exhaust means for causing the outside air to flow into the machine body by discharging the air inside the machine body to the outside, and generating an air flow that passes through the grain container in the machine body;
A far-infrared radiator formed in a cylindrical shape and provided in the machine body on the upstream side of the air flow with respect to the grain container, and having a through hole formed on one end side;
A burner that is attached to the far-infrared radiator with the one-end opening of the far-infrared radiator closed, burns fuel with air introduced therein, and radiates a flame into the far-infrared radiator,
With grain drying equipment.   An outside air inflow hole for allowing outside air to flow into the inside of the body is provided on the outer wall of the body, and the far-infrared emitting body can be visually recognized from the outside of the body through the outside air inflow hole and the through hole. The grain drying apparatus according to claim 1, wherein the grain drying apparatus is provided.

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