JP2006071217A - Fluidized drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluidized drier capable of preventing burning of dust including particulate flying apart from a dried object in a drier, to a surface of a far infrared ray radiator and fire breaking by jetting high-pressure air to the far infrared ray radiator mounted in the drying chamber. <P>SOLUTION: This fluidized drier 1 comprises a dried object carrier 2 having a constitution of a horizontal recessed groove over both ends, and having a bottom face composed of a porous gas blowoff face 5 for carrying dried objects a while venting, a supply device 9 mounted on a starting end side of the dried object carrier 2 for continuously charging the dried objects onto the dried object carrier, the far infrared ray radiator 10 mounted at an upper part of the dried object carrier 2 for radiating the far infrared ray to the dried objects, and an air blower 11. A high-pressure air jetting duct 23 for jetting high-pressure air to a surface of the infrared ray radiator 10 for blowing away dust is mounted near the far infrared ray radiator. The high-pressure air jetting duct 23 has a high-pressure air jetting opening 24 composed of a narrow slot along the longitudinal direction of the far infrared ray radiator 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention continuously feeds the material to be dried to the dry material transporter that conveys the material to be dried, which is composed of a gas ejection surface having a bottom surface with a small hole opening, with a concave groove configuration extending from end to end in the horizontal direction. Then, the object to be dried is irradiated with far-infrared rays, and the object to be dried is air-flowed. The present invention relates to a drying apparatus.

  Conventionally, a fluidized plate having a flat shape is laid in the dryer body, a fluid chamber is formed in the upper portion, a blower chamber is formed in the lower portion, and a large number of air holes for blowing dry air are opened on the surface of the fluidized plate, A fluid drier is known which terminates drying while moving to the discharge side while forming a fluidized bed having a certain thickness with dry air that blows dry matter supplied onto the fluidized plate all at once from the nozzle holes.

  In addition, a large amount of far-infrared rays are radiated into the dryer chamber while keeping the air in the drying chamber in a decompressed state, and a large amount of air in the drying chamber is circulated on the air-permeable conveying device disposed in the drying chamber. Japanese Patent Application Laid-Open No. 11-172997 discloses a method in which the soot is transported in a layered state in a dispersed state, and the soot and the circulating air flow are sufficiently brought into contact with each other by passing a circulating air flow upward from below the soot layer. It is described in.

  Further, in Japanese Patent Laid-Open No. 2002-22362, a grain support surface of a grain holder provided in a horizontal direction inside a drying chamber is formed by a gas ejection surface having a large number of small holes, and a dam is formed on one of the gas ejection surfaces. Supporting the grain holder while supplying a grain from the other upstream side to form a grain layer and disposing a far infrared heater above this grain layer to radiate far infrared rays to the grain A structure in which the grain is dried while adjusting the thickness of the grain according to the height of the weir member on the gas ejection surface while allowing the gas to penetrate from the gas ejection surface having a small hole on the surface and stirring and fluidizing is already known. It is. Japanese Patent Laid-Open No. 2001-50665 introduced the provision of a mountain-shaped cover on the top of the far-infrared radiator as a means for preventing dust from adhering and accumulating on the surface of the far-infrared radiator in the grain dryer. ing.

JP-A-11-172997 Japanese Patent Laid-Open No. 2002-22362 JP 2001-50665 A

  In a fluidized dryer that dries while drying air on the gas jetting surface with a small opening at the bottom from the bottom toward the top, the drying air is in contact with the material to be dried. Dust containing a large amount of fine particles from dry matter rides on the dry wind and is released outside the machine.

  Currently, in many fluidized dryers, the fine particles discharged from the material to be dried on the drying air are discharged out of the machine as they are, or are collected by a dust collector that has the ability to process the air volume equivalent to the drying air. The installation area of the dust collector, the operating power, the noise during operation, the cost of the equipment, the maintenance of the dust collector, etc. are problems.

  Further, in the fluidized drying apparatus that circulates the drying air and passes it through the material to be dried, there is provided a device that prevents the dust containing the fine particles contained in the material to be dried from circulating around the drying air. As a result, dust containing fine particles in the plane adheres to the surface of the far-infrared radiator, which becomes hot, and burns to hinder far-infrared radiation, and there is a risk of fire. In addition, as disclosed in Japanese Patent Application Laid-Open No. 2001-50665, in the case where a mountain-shaped cover is applied to the upper part of the far-infrared radiator, it is possible to prevent floating dust from adhering to the surface of the far-infrared radiator. Have difficulty.

  Therefore, the present invention vents the material to be dried from the bottom to the top and irradiates the material to be dried with far-infrared rays so that the material to be dried can be uniformly and quickly dried, and far-infrared radiation can be obtained. By providing a high-pressure air injection nozzle that injects high-pressure air into the body, dust containing fine particles scattered from the object to be dried in the dryer can be prevented from being burned onto the surface of the far-infrared radiator and the occurrence of fire. An object is to provide a fluid drying apparatus.

  In order to achieve the above object, the present invention proposes a fluidized drying apparatus according to claims 1 to 6.

  That is, the fluidized-drying apparatus according to claim 1 is a dried product transporter configured to convey a material to be dried having a gas ejection surface with a bottom surface having a small hole in a concave groove configuration across the end in the horizontal direction. A feeding device that continuously feeds the object to be dried onto the dried object carrier on the starting end side of the dried object carrier, and a far infrared radiator that irradiates the object to be dried on the upper part of the dried object carrier The air to be dried is blown from the gas ejection surface of the dried product carrier with a blower, and the dried product is subjected to ventilation and floats and repeats settling, and the surface layer is dried from the side overflow outlet on the dried product carrier. A fluid drying apparatus in which objects sequentially overflow, characterized in that a high-pressure air injection duct for injecting high-pressure air onto the surface of the far-infrared radiator to blow away dust is provided in the vicinity of the far-infrared radiator. Is.

  The fluidized drying apparatus according to claim 2 is the fluidized drying apparatus according to claim 1, wherein the high-pressure air jet duct is a high pressure composed of a narrow long hole or a large number of small holes arranged along the longitudinal direction of the far-infrared radiator. It has an air injection port.

  The fluidized drying apparatus according to a third aspect is the fluidized drying apparatus according to the first or second aspect, wherein the high-pressure air jet duct has a surface facing the circumferential direction of the far-infrared radiator, and the facing surface thereof. A plurality of or high-pressure air injection ports are provided.

  According to a fourth aspect of the present invention, there is provided the fluid drying apparatus according to the second aspect, wherein the high-pressure air injection duct is configured to be able to change the position of the high-pressure air injection port in the circumferential direction with respect to the far-infrared radiator. It is characterized by that.

  A fluidized drying apparatus according to a fifth aspect is the fluidized drying apparatus according to any one of the first to fourth aspects, wherein the high-pressure air injection duct is supplied with warm air from a warm air generating space in the fluidized drying apparatus to emit far-infrared radiation. It is characterized by injecting warm air to the body.

  The fluidized drying apparatus according to claim 6 is the fluidized drying apparatus according to any one of claims 1 to 5, wherein the timing of injecting the high-pressure air onto the surface of the far-infrared radiator is constant at the start of drying, at the end of drying, and during drying. It is characterized by being performed every hour or at any time.

  According to the present invention, the material to be dried can be uniformly and quickly dried by flowing air from below to the material to be dried and irradiating the material to be dried with far-infrared radiation, and far infrared radiation. By providing a high-pressure air injection nozzle that injects high-pressure air into the body, dust containing fine particles scattered from the object to be dried in the dryer can be prevented from being burned onto the surface of the far-infrared radiator and the occurrence of fire. Is.

  1 and 2, reference numeral 1 denotes a fluidized drying apparatus. The fluidized drying apparatus 1 includes a dried product carrier 2, and an upper portion thereof is a drying chamber 3 and a lower portion is a blower chamber 4. The dry matter transport body 2 is composed of a gas ejection face body (porous face body) 5 having a concave groove configuration extending from the beginning to the end in the horizontal direction and having a bottom surface opening a small hole. A supply device 9 including a valve 7 and a hopper 8 for continuously feeding the material to be dried a onto the dry matter transport body 2 is provided on the starting end side 6 of the dry matter transport body 2. Moreover, the far-infrared radiator 10 which irradiates far-infrared rays to the to-be-dried object a is provided in the upper part of the to-be-dried object conveyance body 2, and the to-be-dried object a is blown from the gas ejection surface 5 of the dried-object conveyance body 2 with the air blower 11. While being ventilated, the far-infrared radiator 10 emits far-infrared rays.

  The material to be dried a is continuously supplied from the supply device 9 to the start end 6 side of the dry material transport body 2, while the far-infrared radiation from the far-infrared radiator 10 is irradiated on the dry material transport body 2 on the dry material transport body 2. Then, the air to be dried a that has repeatedly floated and settled in response to the ventilation from the blower 11 and has finished drying the surface layer at the end 12 of the dried product carrier 2 sequentially overflows from the lateral overflow port 13. In addition, as shown in FIG. 2, although the stirrer 14 for stirring the to-be-dried material a is provided on the dry matter conveyance body 2, this stirrer 14 does not necessarily need to be provided.

  In the fluidized drying apparatus 1 configured as described above, a dust collection chamber 15 is provided on one end side of the dry matter transport body 2, and a concave dust collection path 16 is provided in parallel with the dry matter transport body 2. In addition, a screw conveyor 17 is provided inside the dust collecting path 16. A dust collector 18 is connected to the dust collection chamber 15. Reference numeral 19 denotes a motor chamber, which is equipped with a motor 20 for driving the blower 11 and other necessary equipment. A burner 21 is provided at one end of the far-infrared radiator 10. An exhaust tube 22 is attached to the other end of the far-infrared radiator 10.

  In the drying chamber 3, a high-pressure air injection duct 23 is provided at a position near the far-infrared radiator 10 to inject high-pressure air onto the surface thereof to blow off dust. As shown in detail in FIG. 3, the high-pressure air injection duct 23 has a high-pressure air injection port 24 composed of a narrow long hole along the longitudinal direction of the far-infrared radiator 10. The high-pressure air injection port 24 may be a row of a large number of small holes or elongated elliptical holes.

  Further, as shown in FIG. 4, the high-pressure air injection duct 23 has a surface 25 facing along the circumferential direction of the far-infrared radiator 10, and a plurality of high-pressure air injection ports 26 on the facing surface. Can be. The high-pressure air injection port 26 may be a narrow-width long hole or a row of numerous small holes or elongated elliptical holes.

  As shown in FIG. 5, the high-pressure air injection duct 23 can be widely used on the surface of the far-infrared radiator 10 if the opposite position of the high-pressure air injection port can be changed in the circumferential direction with respect to the far-infrared radiator 10. Can be ejected, so that the dust removal effect can be improved. In the illustrated embodiment, the high-pressure air injection duct 23 is configured to swing around the swing shaft 27 as an axis.

  In the embodiment of the present invention, as shown in FIGS. 1 and 2, the air in the motor chamber 19, which is a warm air generating space in the fluid drying apparatus 1, is sucked into the high pressure air injection duct 23 by the high pressure blower 28. It supplies and injects warm air to the far-infrared radiator 10. Thus, by injecting warm air to the far-infrared radiator 10, it is possible to suppress a decrease in the surface temperature of the far-infrared radiator 10 and to prevent a decrease in the efficiency of far-infrared irradiation on the object to be dried a.

  Moreover, the timing of injecting the high-pressure air onto the surface of the far-infrared radiator is such that the efficiency of the far-infrared radiation is reduced by injecting the high-pressure air at the start of drying, at the end of drying, and at a fixed time during drying, or at any time during the drying. This can prevent burning and burning due to the adhesion of dust.

  The dust blowing means for the far-infrared radiator 10 according to the present invention can be applied to a grain dryer equipped with the far-infrared radiator as it is. That is, it can be implemented by providing the high-pressure air jet duct 23 facing the far-infrared radiator disposed in the grain take-out chamber or the hot air chamber.

It is a partially broken perspective view which shows the outline | summary of the fluid drying apparatus concerning this invention. It is sectional drawing same as the above. It is detailed sectional drawing which shows the relationship between a high pressure air injection nozzle and a far-infrared radiator. It is detailed sectional drawing which shows other embodiment same as the above. It is detailed sectional drawing which shows other embodiment same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluidized drying apparatus 2 Dry matter conveyance body 3 Drying chamber 4 Air blower chamber 5 Gas ejection surface body 6 Dry end conveyance body start end side 7 Valve 8 Hopper 9 Supply apparatus 10 Far-infrared radiator 11 Blower apparatus 12 Dry matter conveyance body end side DESCRIPTION OF SYMBOLS 13 Overflow port 14 Stirrer 15 Dust collection chamber 16 Dust collection path 17 Screw conveyor 18 Dust collector 19 Motor chamber 20 Motor 21 Burner 22 Exhaust pipe 23 High pressure air injection duct 24 High pressure air injection port 25 Along the circumferential direction of a far-infrared radiator Opposing surface 26 High-pressure air injection port 27 Oscillating shaft 28 High-pressure blower a To-be-dried object

Claims (6)

A dried product transport body that conveys a dried object having a gas discharge surface with a bottom opening having a small hole in the horizontal direction, and a dried product on the start end side of the dried product transport body. A supply device that continuously feeds the object to be dried onto the carrier, and a far-infrared radiator that irradiates far-infrared rays to the object to be dried are provided above the dried object carrier. A fluidized drying device in which the material to be dried is allowed to flow from the ejection surface, the material to be dried is subjected to ventilation, floats, and the material to be dried on the surface layer sequentially overflows from a lateral overflow port on the end side of the dry material transport body while repeatedly sinking,
A fluidized drying apparatus, characterized in that a high-pressure air injection duct for injecting high-pressure air onto the surface of the far-infrared radiator to blow away dust is provided in the vicinity of the far-infrared radiator.   2. The fluidized drying according to claim 1, wherein the high-pressure air injection duct has a high-pressure air injection port composed of a narrow long hole or a plurality of small holes arranged along the longitudinal direction of the far-infrared radiator. apparatus.   The high-pressure air jet duct has surfaces facing along the circumferential direction of the far-infrared radiator, and has a plurality of strips or rows of high-pressure air jets on the facing surface. The fluidized drying apparatus according to 1 or 2.   The high-pressure air injection duct according to claim 2, wherein the high-pressure air injection duct is configured to be capable of changing a position of the high-pressure air injection port facing the circumferential direction of the far-infrared radiator. .   The fluid drying apparatus according to any one of claims 1 to 4, wherein warm air is supplied to the far-infrared radiator by supplying warm air to the high-pressure air jet duct from a warm air generating space in the fluid drying apparatus. The timing for injecting high-pressure air onto the surface of the far-infrared radiator is performed at the start of drying, at the end of drying, and at a certain time during drying, or at any time thereof. Fluidized drying apparatus as described.

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