JP2014233705A - Dry type dust collection device and dry type dust collection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dry type dust collection device capable of making component equipment compact and reducing a cost while keeping enough dust collection capability.SOLUTION: A dry type dust collection device 80 collects dust by allowing exhaust air containing the dust generated in an agricultural facility to pass through a filter 82. The dry type dust collection device 80 comprises: a cylindrical drum 81 which is in a shape of a cylinder rotatable around a rotational shaft center O1 and allows cleaned air CA to flow into an interior of the cylindrical drum 81 through the filter 82 detachably attached to a peripheral surface thereof; and a suction nozzle 83 which sucks the dust collected by the filter 82 by reciprocating in a shaft direction of the shaft center O1 along a surface of the filter 82. The filter 82 is made of a raised cloth having raised fine fibers 82b on a foundation cloth 82a.

Description

  The present invention relates to a dry dust collecting apparatus and a dry dust collecting system that captures dust generated in farming facilities, and in particular, it has a sufficient dust collecting capability, and can be configured compactly to reduce the cost of equipment. The present invention relates to a dry dust collector and a dry dust collection system that can be lowered.

  Conventionally, cereals such as rice harvested by each farmer are dried and prepared in farming facilities such as a cereal dry preparation storage facility (country elevator) and a cereal dry preparation facility (rice center) and stored in large silos. The In this farming facility, a large amount of fine dust is generated when cereals are dried and prepared. For this reason, a dust collector is installed as equipment for collecting and purifying these dusts.

  Among such dust collectors, wet dust collectors have become mainstream from the viewpoint of low cost and ease of installation, and for example, there are those described in Patent Document 1 below. As shown in FIG. 13, in the wet dust collector 180 described in Patent Document 1 below, exhaust air AH containing dust generated in a farming facility is introduced into the casing body 181 and a sprinkler 182 is introduced. Watering towards the exhausted air AH. Thereby, dust is trapped in the water and the exhaust air AH is purified. In this way, the purified exhaust air AH is discharged to the outside while removing water droplets by the eliminator 183. On the other hand, the sewage OW containing dust generated by watering is collected and stored in the lower storage tank 184. And the pumping pump 185 pumps up the sewage OW in the storage tank 184 as appropriate, and supplies it to the sprinkler 182.

JP 2008-307464 A

  However, when using a wet dust collector like the said patent document 1, there existed the following problems. That is, in the wet dust collector 180, a deposit (sludge) accumulates on the bottom of the storage tank 184 and decays, so that odor may be generated. Moreover, since the sewage OW is circulated and used, there is a problem that the equipment is corroded quickly. Furthermore, in winter in cold regions, water may freeze and become unusable, and the exhaust air AH may be discharged outside without being purified.

  On the other hand, even when a dry dust collector called a “bag filter” is used instead of the wet dust collector, there are the following problems. That is, in the conventional “bug filter”, since water is not used, the problem of odor generation and corrosion of equipment does not occur. However, since the exhaust air passing through the filter is about 1 to 3 m / min and slow, In order to obtain the same dust collection efficiency as that of the wet dust collector, it is necessary to use many filters (filter cloths). Moreover, since the pressure loss at the time of normal use is about 1 kPa and is large, it was necessary to provide a large blower. Therefore, there is a problem that the equipment becomes larger and the cost becomes higher than the wet dust collector.

  Accordingly, the present invention provides a dry dust collector capable of reducing the cost by enabling the equipment to be compactly configured while having a sufficient dust collection capability in order to solve the above-described problems. An object of the present invention is to provide a dry dust collection system using a dry dust collector.

  The dry dust collector according to the present invention captures the dust by passing the filter through exhaust air containing dust generated in a farming facility, and the filter is detachably attached to clean inside. A filter mounting member for flowing air, and a suction nozzle for sucking the captured dust while moving along the surface of the filter, and the filter is composed of a raised cloth in which fine fibers are raised on the surface of the base cloth. It is characterized by.

According to this dry dust collector, when exhaust air containing dust passes through the filter, the filter captures the dust and clean air flows into the filter mounting member. Since the dust captured by the filter is sucked by the moving suction nozzle, the filter can be prevented from being clogged with dust, and the dust collection efficiency can be prevented from being lowered.
Moreover, since this dry dust collector is mainly composed of a filter mounting member, a filter, and a suction nozzle, it has a very simple configuration. Accordingly, the equipment can be configured compactly, and the cost can be reduced.
Furthermore, in this dry dust collector, since the filter is composed of a raised cloth in which fine fibers are raised on the surface of the base cloth, the raised fine fibers can capture dust more effectively, and the dust collection Efficiency can be improved.

In the dry dust collector according to the present invention, the filter mounting member may be a rotating member. Further, the filter mounting member is a cylindrical drum having a cylindrical shape rotatable around an axial center and mounting the filter on a peripheral surface, and the suction nozzle is reciprocated in the axial direction of the axial center along the surface of the filter. It may be configured to be movable.
In this case, since the filter is attached using the peripheral surface of the cylindrical drum, the area for attaching the filter is large. Thereby, it becomes the dust collector which can capture | acquire dust with respect to comparatively many exhaust winds. Further, since the suction nozzle reciprocates in the axial direction while the rotating drum rotates around the axis center, dust can be sucked to the entire area of the filter only by linear movement of the suction nozzle.

Moreover, in the dry dust collector according to the present invention, the cylindrical drum extends in a horizontal direction, the diameter of the cylindrical drum is 1 to 3 m, and the axial length of the cylindrical drum is 1 to 1. It may be 7 m.
In this case, the dry dust collector is short and compactly configured, so that it is easy to install in a dust collecting room.

  A dry dust collection system according to the present invention includes the above-described dry dust collection device, a dust collection chamber into which exhaust air containing dust generated in a farming facility is installed, and the filter is attached. A discharge path for discharging clean air flowing from the inside of the member to the outside of the dust collecting chamber, a concentration collection device for removing suction air containing dust sucked by the suction nozzle, and a recovery for collecting the dust removed And a delivery path for sending the dust-removed air dust removed by the concentration collection device into the dust collection chamber.

  According to this dry dust collection system, the following functions and effects can be obtained in addition to the functions and effects of the dry dust collector described above. That is, the filter captures dust, the suction nozzle sucks dust captured, the concentration collection device removes the suction air sucked by the suction nozzle, and the dust removal wind is sent to the dust collection chamber through the delivery path. A circulation occurs in which the filter traps dust against the dust collection air. Therefore, dust can be captured by this circulation without taking it out of the system, and only clean air can be discharged outside the dust collecting chamber through the discharge path.

Moreover, the dry dust collection system which concerns on this invention WHEREIN: The said concentration collection apparatus may be a cyclone dust remover which drops dust from a suction wind by centrifugation.
In this case, since the dust is dropped by the cyclone dust remover, the dust can be removed from the suction air without using a filter or the like, and the collecting part can easily collect the dust.

Moreover, in the dry dust collection system according to the present invention, a primary settling chamber into which exhaust air containing dust such as sawdust generated in a farming facility is sent is provided, and the dust collection chamber is the primary settling chamber. The exhausted air in which the impurities are settled in the chamber may be sent.
In this case, exhaust air containing impurities other than dust passes through the primary settling chamber and is sent to the dust collection chamber. As a result, the contaminants are removed in the primary sedimentation chamber, so that it is possible to prevent the dust collection efficiency from being lowered due to the contaminants clogging the filter of the dry dust collector.

Further, in the dry dust collection system according to the present invention, the dust collection chamber and a primary settling chamber into which exhaust air containing dust such as sawdust generated in a farming facility is integrated to form an integrated space. In the integrated space, a sedimentation space for sedimenting impurities is formed on the lower side, and the dry dust collector may be disposed on the upper side of the sedimentation space.
In this case, it is possible to perform sedimentation of impurities in the sedimentation space and capture of dust by the dry dust collector by the integrated space. Therefore, in the case where the existing farming facility has a room for settling contaminants, but does not have a room for capturing dust, and there is sufficient space for placing a dry dust collector, the upper side of the settling room It can be easily configured simply by arranging a dry dust collector.

  ADVANTAGE OF THE INVENTION According to this invention, while having sufficient dust collection capability, the equipment can be comprised compactly, the dry dust collector which can reduce cost, and the dry type using this dry dust collector A dust collection system can be provided.

It is the figure which showed typically the structure of the country elevator of 1st Embodiment. It is the figure which showed typically the structure of the dry-type dust collection system shown in FIG. FIG. 3 is a perspective view of the dust collection chamber and the dry dust collection device shown in FIG. 2. FIG. 3 is a side view of the dust collection chamber and the dry dust collection device shown in FIG. 2. It is the perspective view which showed the drive mechanism of the cylindrical drum. (A) It is the figure which showed the state in which the drum drive belt and the nozzle drive belt were spanned. (B) It is the figure which showed the structure for adjusting the tension | tensile_strength of a drum drive belt. It is the figure which showed the relationship between the filter shown in FIG. 3, and a suction nozzle. It is the table | surface which showed the effect at the time of using the filter of this embodiment, and the effect at the time of using the filter of a comparative example. It is the figure which showed typically the structure of the dry-type dust collection system of 2nd Embodiment. It is the perspective view which showed arrangement | positioning of the dry-type dust collector of a 1st modification. It is the perspective view which showed arrangement | positioning of the dry-type dust collector of a 2nd modification. It is the perspective view which showed arrangement | positioning of the dry-type dust collector of a 3rd modification. It is the figure which showed schematically the structure of the conventional wet dust collector.

  Embodiments of a dry dust collector and a dry dust collection system according to the present invention will be described below with reference to the drawings. FIG. 1 is a diagram schematically illustrating a configuration of a country elevator 1 to which the dry dust collection system 60 of the first embodiment is applied.

  The country elevator 1 is a cereal dry preparation storage facility. As shown in FIG. 1, the country elevator 1 mainly includes a cargo receiving unit 10, a drying unit 20, a storage unit 30, a preparation unit 40, a shipping unit 50, and a dry collection. And a dust system 60.

  The consignment receiving unit 10 is a facility for accepting ginger that arrives by individual and by consignment. The goods receiving part 10 is mainly provided with the coarse selection machine 11, the goods receiving weighing machine 12, and the several storage bin 13 in this model. The coarse selection machine 11 removes foreign matters such as sawdust from the raw ginger carried in from the cargo receiving hopper 14. The soot generated at the time of the coarse selection by the coarse selector 11 is sent to the dry dust collection system 60 by a dust collection fan (not shown). The load receiving and weighing machine 12 measures the weight of the consignment and the amount of water for each individual and consignment after the rough selection. The storage bin 13 temporarily stores the ginger conveyed from the load receiving and weighing machine 12 before drying, and ventilates the ginger so that it does not ferment. Dust generated during storage of the storage bin 13 is sent to the dry dust collection system 60 by a dust collection fan.

  The drying unit 20 is a facility for drying the ginger after receiving the cargo by making the moisture in the grains uniform. A cocoon dryer 21 is provided as the drying unit 20. The cocoon dryer 21 dries so that the moisture content of the ginger conveyed from each storage bin 13 becomes about 14.5%. Exhaust air containing dust generated when the soot dryer 21 is dried is sent to the dry dust collection system 60.

  The storage unit 30 mainly includes a plurality of main silos 31, a selective machine 32, and a dehuller 33. The main silo 31 stores the dried soot after drying for an extended period of time. Dust generated when the soot is put into the main silo 31 and discharged from the main silo 31 is sent to the dry dust collection system 60 by a dust collecting fan. The selection machine 32 sorts the dried rice cake transported from each main silo 31 into a beautiful selection rice cake, a branch-attached rice cake, an immature rice cake, or the like. The detaching machine 33 performs detaching with respect to the tacking ridges conveyed from the fine selection machine 32. The branch bellflower generated at the time of the selection of the finer 32 and the soot generated at the time of the removal of the removal machine 33 are sent to the dry dust collection system 60 by a dust collection fan.

  The preparation unit 40 mainly includes a hulling machine 41, a swing sorter 42, a stone remover 43, and a grain sorter 44. The hulling machine 41 removes the carefully selected rice cake after selection. The rice husk produced during the rice huller 41 is transferred to a rice husk storage (not shown) by a rice husk transfer fan, and the dust generated from the rice hull equipment is sent to the dry dust collection system 60 by the dust collecting fan. It has become. The swing sorter 42 takes out only the good brown rice from the crushed rice after scouring. The stone remover 43 removes stone from the unpolished rice conveyed from the swing sorter 42. The grain sorter 44 sorts brown rice after removing stones into brown rice of predetermined particles.

  The shipping unit 50 is a facility for weighing and packing brown rice before shipping. The shipping unit 50 mainly includes a brown rice weighing machine 51, a weighing packaging machine (not shown), and a shipping tank 52. The brown rice weighing machine 51 measures the total weight of fine brown rice after stone removal and grain selection. There are two types of shipments: bagging and roses. In the case of bagging and shipping, bags are packed by a weighing and packaging machine, and in the case of bulk shipping, they are packed in a truck by a bulk shipping tank and shipped. Dust generated in the conveyance path or the like is sent to the dry dust collection system 60 by a dust collection fan. The unpolished rice after weighing is put into the shipping tank 52, and the unpolished rice put into the shipping tank 52 is loaded on a truck and shipped through a belt conveyor and a bucket elevator.

  Here, as described above, the dry dust collection system 60 is fed with impurities and dust such as sawdust, branch bellflowers, and soot from the cargo receiving unit 10, the drying unit 20, the storage unit 30, and the preparation unit 40. It has become. The dry dust collection system 60 is a facility that captures the above-described impurities and dust and discharges clean air. FIG. 2 is a diagram schematically showing the configuration of the dry dust collection system 60 shown in FIG. As shown in FIG. 2, the dry dust collection system 60 mainly includes a dust collection chamber 70, a dry dust collection device 80, a cyclone dust collector 90, and a primary settling chamber 100. .

  The dust collection chamber 70 is a room into which dust generated during drying of the basket dryer 21 and dust generated during storage of the storage bin 13 are sent while being included in the exhaust air. Here, exhaust air including dust generated during drying is referred to as “dryer exhaust air KH”, and exhaust air including dust generated during storage is referred to as “bin exhaust air BH”. The dust collection chamber 70 includes a main body chamber 71, a clean chamber 72, and a discharge duct 73, and the dryer exhaust air KH and the bottle exhaust air BH are sent into the main body chamber 71. Since “dryer exhaust air KH” and “bin exhaust air BH” contain almost no contaminants, they are fed directly into the dust collection chamber 70 in this embodiment, but via the primary settling chamber 100 described later. It may be sent to the dust collection chamber 70. In addition, waste dust generated at the time of coarse selection by the coarse selection machine 11, branching injuries generated at the time of selection by the fine selection machine 32, and soot generated at the time of removal of the removal machine 33 are included in the wind as contaminants. It is sent into the primary settling chamber 100. Here, the exhaust air containing the above-described impurities is referred to as “mechanical dust collection exhaust air MH”. Since the mechanical dust collection exhaust MH includes dust in addition to the contaminants, the mechanical dust collection exhaust MH is sent into the main body chamber 71 after passing through the primary settling chamber 100.

  Thus, the fed dryer exhaust air KH, bottle exhaust air BH, and mechanical dust exhaust air MH are purified by the dry dust collector 80 disposed in the main body chamber 71 to become clean air CA. Thereafter, the clean air CA is discharged to the outside of the dust collection chamber 70 through the clean chamber 72 and the discharge duct 73 by the static pressure of each pushing fan. In this embodiment, no exhaust fan is installed. However, if each pushing fan does not have a sufficient static pressure, an exhaust fan is provided on the exhaust side of the filter 82 described later, and the clean air CA is outside the dust collection chamber 70. You may comprise so that it may be discharged to. The path through which the clean air CA of this embodiment passes through the clean chamber 72 and the discharge duct 73 corresponds to the “discharge path” of the present invention. Note that the main body chamber 71 and the clean chamber 72 of the dust collection chamber 70 are provided with opening / closing doors 71a and 72a (see FIG. 4) through which workers can enter and exit.

  The dry dust collector 80 allows the filter 82 to pass the dryer exhaust air KH, the bottle exhaust air BH, and the mechanical dust exhaust air MH, and captures dust. That is, the dry dust collector 80 captures dust from the dryer exhaust air KH, the bottle exhaust air BH, and the mechanical dust exhaust air MH that are in a dry state without using water. Therefore, unlike conventional wet dust collectors, deposits (sludge) are not deposited on the bottom of the storage tank and decayed, so that no odor is generated. Moreover, since sewage does not circulate, the equipment is not easily corroded, and the equipment has excellent durability.

  Hereinafter, the structure of the dry dust collector 80 of this embodiment is demonstrated in detail using FIGS. 3-7. FIG. 3 is a perspective view of the dust collection chamber 70 and the dry dust collection device 80 shown in FIG. FIG. 4 is a side view of the dust collection chamber 70 and the dry dust collection device 80 shown in FIG. As shown in FIGS. 3 and 4, the dry dust collector 80 can be attached to and detached from a cylindrical drum 81 having a cylindrical shape rotatable around a rotation axis O <b> 1 (see FIG. 2), and a peripheral surface of the cylindrical drum 81. And a suction nozzle 83 that can move along the surface of the filter 82 in the axial direction of the rotation axis center O1.

  As shown in FIG. 4, the cylindrical drum 81 has a disk-shaped bottom plate 81a on one end side (left side in FIG. 4) in the rotational axis direction (hereinafter simply referred to as “axial direction”). For this reason, exhaust air that has entered the cylindrical drum 81 from the outside to the inside does not flow from one end side in the axial direction of the cylindrical drum 81 to the outside of the cylindrical drum 81. On the other hand, the other end side in the axial direction of the cylindrical drum 81 (the right side in FIG. 4) is open and attached to a partition wall 71b (see FIG. 3) that partitions the main body chamber 71 and the clean chamber 72. For this reason, the exhausted air inside the cylindrical drum 81 flows from the other end side in the axial direction of the cylindrical drum 81 to the clean chamber 72.

  On the cylindrical drum 81, a support shaft 81b coaxial with the rotation axis center O1 protrudes from the open side opposite to the bottom plate 81a and is supported rotatably by a bearing with respect to the upper end of the upstanding support member 84. ing. The lower end of each support member 84 is fixed to a fixed base 85. The cylindrical drum 81 has a plurality of attachment bones 81c for attaching the filter 82 to the peripheral surface. Each attachment bone 81c extends in the axial direction and is separated by a predetermined distance in the circumferential direction. That is, there is a space between the adjacent mounting bones 81c. The configuration for attaching the filter 82 is not limited to the configuration using the mounting bone 81c, and can be changed as appropriate. For example, a configuration using punching metal may be used. Here, the configuration of the drive mechanism of the cylindrical drum 81 will be described with reference to FIGS. 5 and 6.

  In this cylindrical drum 81, as shown in FIG. 6A, a rotating frame 81d is attached to a support shaft 81b so as to be integrally rotatable, and as shown in FIG. 5, a pulley 81f is attached to an output shaft of an electric motor 81e. A drum drive belt 81g is bridged between the pulley 81f and the rotary frame 81d. For this reason, when the electric motor 81e is driven, the rotational driving force is transmitted to the rotating shaft 81b via the pulley 81f, the drum driving belt 81g, and the rotating frame 81d, so that the cylindrical drum 81 rotates around the shaft center O1. ing.

  In the cylindrical drum 81, the tension of the drum driving belt 81g can be adjusted by adjusting the position of a roller 81h (see FIG. 5) that engages with the drum driving belt 81g. That is, as shown in FIG. 6B, the roller 81h is attached to the long hole 81k of the attachment plate 81j via the bolt 81i. For this reason, the tension of the drum driving belt 81g can be adjusted by loosening the bolt 81i and sliding the roller 81h along the longitudinal direction of the long hole 81k (the left-right direction in FIG. 6B).

  The filter 82 filters dust contained in the dryer exhaust air KH, the bottle exhaust air BH, and the mechanical dust collection exhaust air MH. As shown in FIG. 3, the filter 82 is a thin rectangular brushed cloth. For example, in a type in which the diameter of the cylindrical drum 81 is 2.5 m and the axial length is 5.1 m, a total of 15 filters are prepared. Has been. Each filter 82 is detachably attached to the attachment bone 81c of the cylindrical drum 81. For example, the cylindrical drum 81 has a diameter of 2.5 m and an axial length so as to constitute the peripheral surface of the cylindrical drum 81. In the type whose length is 5.1 m, three are arranged in the axial direction and five are arranged in the circumferential direction. Thus, each filter 82 captures dust while rotating around the rotation axis center O1, and allows the clean air CA to pass therethrough. The number of filters 82 can be changed as appropriate.

  The suction nozzle 83 sucks the dust captured by the filter 82. In FIG. 4, the suction nozzle 83 is not shown. Three suction nozzles 83 are arranged on one side surface of the cylindrical drum 81 in the longitudinal direction, and are separated by a predetermined distance in the axial direction as shown in FIG. Each suction nozzle 83 is configured to reciprocate by the axial length of one filter 82. That is, as shown in FIG. 5, a chain 81m extending in the axial direction is rotatably stretched on a rail member (not shown), and a suction nozzle 83 is attached to the chain 81m via an attachment member 81n. One side of the nozzle drive belt 81q is assembled to the foam speed reducer 81p connected to the chain 81m, and the other end side of the nozzle drive belt 81q is assembled to the pulley 81r assembled to the rotating shaft 81b. .

  Thus, as described above, when the cylindrical drum 81 is rotated by the electric motor 81e, this rotational driving force is transmitted to the chain 81m via the rotating shaft 81b, the pulley 81r, the nozzle driving belt 81q, and the foam speed reducer 81p, and suction is performed. The nozzle 83 can reciprocate. Therefore, in the dry dust collecting apparatus 80 of the present embodiment, the cylindrical drum 81 is driven to rotate by the single electric motor 81e, and the suction nozzle 83 can be reciprocated, so that two drive sources are not used and it is inexpensive. It is configured.

  Here, FIG. 7 is a diagram showing the relationship between the filter 82 and the suction nozzle 83 shown in FIG. As shown in FIG. 7, each suction nozzle 83 reciprocates in the axial direction while the filter 82 rotates around the axial center O <b> 1 with the tip 83 a of the suction nozzle 83 being close to the surface of the filter 82. . Then, when the suction nozzle 83 sucks, the filter 82 is sucked to the suction nozzle 83, and dust (dust) at the sucked portion is surely removed. In this embodiment, the cylindrical drum 81 (filter 82) rotates once in about 10 seconds, and each suction nozzle 83 reciprocates once in about 10 minutes. In this way, the trapped dust is removed in the entire area of the filter 82 so that clogging does not occur due to the dust. The rotational speed of the cylindrical drum 81 and the moving speed of each suction nozzle 83 can be changed as appropriate.

  By the way, this embodiment is characterized in that the filter 82 is formed of a raised cloth. This filter 82 has air permeability, and as shown in FIG. 7, fine fibers 82b are raised on the surface side of the base fabric 82a. Thus, in the filter 82, the raised fine fibers 82b capture dust more effectively. In this filter 82, the base fabric 82a is made of polyester fibers coated with synthetic latex (resin), and the fine fibers 82b are made of acrylic / modacrylic (50% each). The dimension in the thickness direction of the filter 82 is about 13 mm.

  Next, the effect of the filter 82 of this embodiment is demonstrated using FIG. FIG. 8 shows the effect of using the filter 82 of the present embodiment when the dryer exhaust air KH and the like pass through the filter, and the case of using the filter of the comparative example (hereinafter referred to as “filter 82F”). It is the table | surface which showed the effect. Here, the filter 82F is a non-woven fabric composed of fiber (polyester) and resin (acrylic, synthetic rubber), and is an improvement of “Taveron TF-90” manufactured by Kanai Important Industry Co., Ltd.

  In FIG. 8, the pressure loss [Pa] is the difference between the pressure immediately before passing through the filter and the pressure immediately after passing through the filter. In general, the larger the pressure loss, the better the dust collection efficiency as a filter, but it means that a large blower needs to be used. Therefore, as shown in FIG. 8, when the filter 82 is used, it can be confirmed that the dust collection efficiency is good because the pressure loss is larger than when the filter 82F is used.

In particular, in the present embodiment, it has been found that it is effective to combine a raised type filter 82 and a suction nozzle 83 with the rotary drum 81 against dust generated in a farming facility. Here, in FIG. 8, the outlet concentration [g / Nm ³ ] is the dust concentration immediately after passing through the filter. As shown in FIG. 8, when the filter 82 is used, the outlet concentration [g / Nm ³ ] that can be measured at present is 0.001 [g / Nm ³ ], which is sufficiently small. It is below the environmental regulation value of soot treatment using “Bug Filter”. That is, it can be said that the effect of the dust treatment of the dry dust collector 80 of the present embodiment is at the same level as the “bag filter”. In the dry dust collector 80 of the present embodiment, the conventional reason for realizing a low pressure loss and a high collection rate is as follows.

In the present embodiment, the dust generated in the farming facility is effectively captured by the fine fibers 82b raised by the filter 82, but the dust gradually enters the inside of the filter 82 and finally escapes to the clean chamber 72 side. Suction is performed by the suction nozzle 83 before. For this reason, dust treatment can be effectively performed with low pressure loss without using a high density filter cloth as in the case of the conventional “bag filter”, and the outlet concentration [g / Nm ³ ] can be achieved. Therefore, in the dry dust collector 80 of the present embodiment, the passage speed of the exhaust air of the “bag filter” (approximately 1 to 3 m / min) is 20 without using a high-density filter cloth like the “bag filter”. It has become possible to pass the exhaust at a speed more than twice as fast.

  Here, as shown in FIG. 8, the pressure loss (200 [Pa]) when the filter 82 is used is larger than the pressure loss (80 [Pa]) when the filter 82F is used. It will not be. That is, the pressure loss (200 [Pa]) when using the filter 82 is sufficiently smaller than the pressure loss (about 1 [kPa]) when using the “bag filter” which is a conventional dry dust collector. is there. In the dry dust collecting device 80 of the present embodiment, the filter passing speed of the exhaust air is 0.7 to 0.8 m / second, and a sufficiently large filter passing speed is obtained. In the “filter”, the filter passing speed of exhaust air is 1 to 3 m / min, and a large filter passing speed cannot be obtained.

  Therefore, with the dry dust collector 80 of this embodiment, it is not necessary to use a large blower like the conventional “bag filter”, and the equipment can be made smaller than the conventional “bag filter”. Thus, the cost can be reduced. And since the pressure loss of the dry dust collector 80 and the pressure loss of the conventional wet dust collector are comparable, the dry dust collector 80 of this embodiment is mainly used in the existing farming facilities. It can be applied by replacing with a wet dust collector.

Next, in FIG. 8, the collection rate [%] indicates the ratio [%] that dust can be collected when passing through the filter, and the dust concentration [g] immediately before passing through the filter. / Nm ³ ] and the dust concentration [g / Nm ³ ] immediately after passing through the filter. The dust concentration was measured by a circular filter paper and a low volume air sampler collection / weight method.

When the filter 82 is used, the dust concentration immediately before passing through the filter 82 is 0.015 to 0.033 [g / Nm ³ ], and the dust concentration immediately after passing through the filter 82 is 0.001 [g. / Nm ³ ]. For this reason, as shown in FIG. 8, the collection rate when using the filter 82 was 93.3 to 97.0 [%]. On the other hand, when the filter 82F is used, the dust concentration immediately before passing through the filter 82F is 0.038 to 0.044 [g / Nm ³ ], and the dust concentration immediately after passing through the filter 82 is 0.005. 0.008 was [g / Nm ^3]. For this reason, as shown in FIG. 8, the collection rate in the case of using the filter 82F was 78.9 to 88.6 [%].

  Therefore, when the filter 82 is used, it can be confirmed that the rate of dust collection is higher and the dust collection efficiency is better than when the filter 82F is used. And the collection rate (93.3-97.0 [%]) at the time of using the filter 82 is high enough, and should be equal to or more than the collection rate at the time of using the conventional wet dust collector. I understood.

  Subsequently, in FIG. 8, “visually” refers to whether the operator can visually confirm the dust with respect to the clean air CA discharged to the outlet of the dry dust collector 80, that is, the clean chamber 72 (see FIG. 2). It shows. As shown in FIG. 8, when the filter 82 was used, dust was not visible, whereas when the filter 82F was used, dust was visible. Therefore, it was confirmed that when the filter 82 is used, dust can be collected more reliably than when the filter 82F is used. Thus, it was discovered from the results shown in FIG. 8 that the dust efficiency can be improved by using the filter 82 which is a raised cloth.

  Here, in FIG. 2, the description returns to the dry dust collection system 60 of the present embodiment. As shown in FIG. 2, each suction nozzle 83 and the inlet of the cyclone dust collector 90 are connected by a suction pipe 75, and a suction fan 76 is provided in the middle of the suction pipe 75. For this reason, the dust sucked by the suction nozzle 83 is included in the suction air CH by the suction of the suction fan 76. The suction air CH is sent to the cyclone dust collector 90.

  The cyclone dust collector 90 removes dust from the suction air CH by forming a swirling flow of air inside. The outlet of the cyclone dust collector 90 and the primary settling chamber 100 are connected by a delivery pipe 77. Thus, in the cyclone dust collector 90, the suction wind CH and the dust contained therein are separated vertically by centrifugal separation, and the dust removal wind ZH from which the dust has been removed is sent to the primary settling chamber 100 through the delivery pipe 77. It comes to send. In addition, since the cyclone dust collector 90 cannot completely separate the dust, the dust removal air ZH contains a little dust. The cyclone dust collector 90 of the present embodiment corresponds to the “concentration collection device” of the present invention, but the configuration of the concentration collection device is not limited to the cyclone dust collection device 90 and can be changed as appropriate. .

  The dust separated by the cyclone dust collector 90 falls while turning toward the rotary valve 91 provided at the lower part of the cyclone dust collector 90. And since the opening part of the flexible container bag 92 is detachably connected to the lower part of the rotary valve 91, dust flows into the flexible container bag 92 when the rotary valve 91 rotates. Then, dust that has been removed can be collected by the flexible container bag 92. Thus, since the dust is dropped by the cyclone dust collector 90, the dust can be removed without using a filter or the like, and the flexible container bag 92 can easily collect the dust. The flexible container bag 92 of the present embodiment corresponds to the “collecting unit” of the present invention, but the configuration of the collecting unit is not limited to the flexible container bag 92 and can be appropriately changed. good.

  The primary settling chamber 100 is a chamber that sinks and accumulates impurities that are larger than the dust and heavy. In the primary settling chamber 100, for example, the floor is made of concrete soil, and when the country elevator 1 is stopped, foreign matter accumulated by a bucket loader or the like is taken out. In addition, you may provide the discharge machine which discharges the accumulated foreign substances by making the floor of the primary sedimentation chamber 100 into a hopper shape. The upper part of the primary settling chamber 100 and the upper part of the main body chamber 71 of the dust collecting chamber 70 are connected by a connecting duct 78. As described above, the mechanical dust collection exhaust air MH is fed into the primary settling chamber 100.

  In this way, in the primary settling chamber 100, foreign matter settles and is removed by gravity with respect to the sent mechanical dust collection exhaust air MH. The machine dust collection exhaust MH from which the impurities are removed and the above-described dust removal wind ZH are sent to the dust collection chamber 70 through the connection duct 78. As described above, the reason why the mechanical dust collection exhaust MH is sent to the dust collection chamber 70 after passing through the primary settling chamber 100 is that the mechanical dust collection exhaust MH containing impurities is directly sent to the dust collection chamber 70. This is because impurities are clogged in the filter 82 of the dry dust collector 80 and the dust collection efficiency is lowered. The path through which the dust removal wind ZH of the present embodiment passes through the delivery pipe 77, the primary settling chamber 100, and the connecting duct 78 corresponds to the “delivery path” of the present invention.

The effect of the dry dust collector 80 of this embodiment is demonstrated.
According to the dry dust collector 80, the dryer exhaust air KH, the bottle exhaust air BH, and the mechanical dust exhaust air MH containing dust are fed into the main body chamber 71 of the dust chamber 70 and pass through the filter 82. At this time, the filter 82 captures the dust, and the clean air CA flows into the cylindrical drum 81. The dust trapped by the filter 82 is sucked by the suction nozzle 83 that reciprocates as the cylindrical drum 81 rotates, so that the filter 82 can be prevented from being clogged by dust, and the dust collection efficiency can be reduced. Can be prevented.

  Further, since the dry dust collector 80 mainly includes a cylindrical drum 81, a filter 82, and a suction nozzle 83, the dry dust collector 80 has a very simple configuration. That is, the dry dust collector 80 is a relatively large baghouse that accommodates a filter cloth suspended in a cylindrical bag and a plurality of filter cloths, like a “bag filter” that is a conventional dry dust collector. It is not equipped with a mechanism for removing dust trapped with cloth, a hopper for collecting dust, and the like. Therefore, according to the dry dust collector 80, the equipment can be configured compactly and the cost can be reduced.

  Specifically, in the dry dust collector 80 of the present embodiment, the cylindrical drum 81 extends in the horizontal direction, the diameter of the cylindrical drum 81 is about 1 to 3 m, and the axial length of the cylindrical drum 81 is. Is about 1 to 7 m. On the other hand, the conventional “bag filter” has a height dimension of about 6 m, a width dimension of about 1.5 to 5.0 m, and a depth dimension of about 3 m. Here, in the dry dust collector 80 of the present embodiment and the conventional “bag filter”, if the exhaust air filter passing speed is set to be the same, the dry dust collector 80 of the present embodiment has a higher speed than the “bag filter”. The filtration area of the filter 82 is about 1/20. Therefore, in the dry dust collector 80 of this embodiment, the structure is simple, the equipment is small, and the cost can be reduced. As described above, the dry dust collector 80 is shorter and more compact than a conventional “bag filter”, and thus is easily installed in a room where dust collection is required.

  Further, in the dry dust collector 80, the filter 82 is attached using the peripheral surface of the cylindrical drum 81, so the area for attaching the filter 82 is large. Thereby, it is the dust collector which can capture | acquire dust with respect to comparatively many exhaust winds. Furthermore, in the dry dust collector 80, the filter 82 is configured by a raised cloth in which fine fibers 82b are raised on the surface of the base cloth 82a. For this reason, in the filter 82, the raised fine fiber 82b can capture dust more effectively, and the dust collection efficiency can be improved. In other words, the dry dust collector 80 can obtain a sufficiently high dust collection efficiency even if it is configured compactly.

The effect of the dry dust collection system 60 of this embodiment is demonstrated.
According to the dry dust collection system 60, in addition to the effects of the dry dust collector 80 described above, the following effects can be obtained. That is, as shown in FIG. 2, the dust captured by the filter 82 is sucked by the suction nozzle 83, and the suction air CH containing the dust is sent to the cyclone dust collector 90. Then, the cyclone dust collector 90 removes the suction air CH, and the dust removed is collected by the flexible container bag 92. On the other hand, the dust-removed wind ZH removed by the cyclone dust collector 90 is sent to the dust collecting chamber 70 through the delivery pipe 77, the primary settling chamber 100 and the connecting duct 78. Thus, even if the dust cannot be completely removed by the cyclone dust collector 90, the dust removal air ZH slightly containing dust passes through the filter 82 of the dry dust collector 80. As a result, even a small amount of dust contained in the dust removal wind ZH can be captured.

  In short, according to the dry dust collection system 60, the filter 82 captures dust, the suction nozzle 83 sucks dust, the cyclone dust collector 90 removes the suction air CH sucked by the suction nozzle 83, Circulation occurs in which the dust removal wind ZH is sent into the dust collection chamber 70 and the filter 82 captures dust with respect to the dust removal wind ZH. Therefore, dust can be captured by this circulation without taking it out of the system (outside of the dry dust collection system 60), and only clean air CH can be discharged outside the dust collection chamber 70.

  In addition, according to the dry dust collection system 60, the exhaust air containing impurities in addition to dust (mechanical dust exhaust air MH) is sent to the dust collection chamber 70 after passing through the primary settling chamber 100. Thereby, since contaminants are removed in the primary sedimentation chamber 100, it can be prevented that the filter 82 of the dry dust collector 80 is clogged by the contaminants and the dust efficiency is lowered.

  In addition, the inventors have operated the dry dust collection system 60 using the dry dust collector 80 and the wet dust collection system using the conventional wet dust collector for about two months, and compared the integrated power consumption. did. As a result, in the dry dust collection system 60, the accumulated power amount was about 2000 [kWh], whereas in the wet dust collection system, the accumulated power amount was about 5000 [kWh]. For this reason, compared with a wet dust collection system, an integrated electric energy can be made into about 40% and an electricity bill can be made low. Furthermore, since water is not used, the cost of water supply becomes unnecessary. Therefore, according to the dry dust collection system 60, the running cost can be reduced.

  Next, a second embodiment will be described with reference to FIG. FIG. 9 is a diagram schematically showing a configuration of a dry dust collection system 60A of the second embodiment. In the dry dust collection system 60 of the first embodiment, as shown in FIG. 2, the dust collection chamber 70 and the primary settling chamber 100 are configured as separate rooms, but the dry dust collection system of the second embodiment. In the system 60A, as shown in FIG. 9, the dust collection chamber and the primary settling chamber are an integral room (hereinafter referred to as “dust collection chamber 70A”), and an integral space is formed therein. There is a feature.

  The dust collection chamber 70A of the second embodiment is a modification of the primary settling chamber installed in a conventional small rice center. The dust collection chamber 70A is a two-story building that is long in the vertical direction, and in the integrated space of the dust collection chamber 70A, a sedimentation space SP is formed on the lower side for sedimentation of foreign substances. And the installation stand 79 for arrange | positioning the dry-type dust collector 80 similar to 1st Embodiment above the sedimentation space SP is provided. Thus, the dry dust collector 80 is disposed in a state in which the filter 82 is exposed to the exhaust air sent above the settling space SP.

  In the dust collection chamber 70A, the dryer exhaust air KH, the bottle exhaust air BH, and the mechanical dust exhaust air MH are sent to the lower side, and the impurities contained in the mechanical dust exhaust air MH are caused by gravity. It settles and is removed. Thereafter, the dryer exhaust air KH, the bottle exhaust air BH, and the mechanical dust collection exhaust air MH rise and pass through the filter 82 of the dry dust collector 80 to become clean air CA. The dust captured by the filter 82 is sucked by the suction nozzle 83, and the cyclone dust collector 90 removes the suction air CH. The dust-removed wind ZH that has been dust-removed is sent into the sedimentation space SP below the dust collection chamber 70A. Here, the dust collection chamber 70A is a modification of the existing primary settling chamber, and the static pressure of the dust collection fan and the dryer fan may be insufficient. Therefore, as shown in FIG. It has been expanded. As described above, when the dust collection chamber 70A is planned as a new installation without remodeling the existing primary settling chamber, the dryer exhaust air KH and the bottle exhaust air BH contain almost all impurities. Therefore, the dryer exhaust air KH and the bottle exhaust air BH may be sent directly to the upper side of the integrated space without being sent to the lower side of the integrated space. Since the other configuration of the second embodiment is the same as the configuration of the first embodiment, the same reference numerals are given to the respective parts and the description thereof is omitted.

The effects of the dry dust collection system 60A of the second embodiment will be described.
According to the dry dust collection system 60 </ b> A, the dust collection chamber 70 </ b> A, which is a single room, can perform sedimentation of contaminants by the sedimentation space SP and capture of dust by the dry dust collection device 80. Therefore, in the case where the existing farming facility has a room for settling contaminants, but does not have a room for capturing dust, and there is sufficient space for placing a dry dust collector, the upper side of the settling room It can be easily configured simply by disposing the dry dust collector 80 on the surface. Other functions and effects of the second embodiment are the same as the functions and effects of the first embodiment, and a description thereof will be omitted.

  In addition, in farming facilities such as the existing rice center, it has a room (primary sedimentation room) for sedimentation, but it does not have a room (dust collection room) for capturing dust, Some discharged to the outside only through the primary sedimentation chamber. In contrast to such farming facilities, the “bag filter”, which is a conventional dry dust collector, has a large filtration area, so it was not practical to install it in the primary settling chamber. In contrast, the dry dust collector 80 of the present embodiment has a smaller filtration area than the “bag filter” and can be installed in the primary settling chamber.

The dry dust collecting apparatus and the dry dust collecting system according to the present invention have been described above. However, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention.
For example, in the dry dust collection system 60 of the first embodiment, the dust removal air ZH removed by the cyclone dust collector 90 is sent to the dust collection chamber 70 after passing through the primary settling chamber 100. It may be sent directly to the chamber 70.
Moreover, in the filter 82 of each embodiment, the structure of the raising cloth which raised the fine fiber can be changed suitably, for example, the fine fiber 82b may be comprised with the acryl.

  In each embodiment, one dry dust collector 80 is provided, but the number and arrangement of the dry dust collector 80 can be changed as appropriate. For this reason, according to the installation place in the existing farming facility, you may arrange | position two or more dry type dust collectors 80 in parallel like the 1st modification shown in FIG. Further, two or more dry dust collectors 80 may be arranged in the vertical direction as in the second modification shown in FIG. 11, and dry dust collection is performed as in the third modification shown in FIG. Two or more devices 80 may be arranged in series.

DESCRIPTION OF SYMBOLS 1 Country elevator 60, 60A Dry type dust collection system 70, 70A Dust collection room 71 Main body room 72 Clean room 73 Discharge duct 74 Discharge fan 75 Suction pipe 76 Suction fan 77 Delivery pipe 78 Connection duct 79 Installation stand 80 Dry type dust collector 81 Cylinder Drum 82 Filter 82a Base cloth 82b Fine fiber 83 Suction nozzle 90 Cyclone dust collector 91 Rotary valve 92 Flexible container 100 Primary settling chamber SP Settling space O1 Rotating shaft center KH Dryer exhaust air BH Bin exhaust air MH Machine dust exhaust air CH Suction air ZH Dust removal air CA Clean air

Claims (8)

In a dry dust collector that captures the dust by passing a filter against exhaust air containing dust generated in a farming facility,
A filter mounting member in which the filter is detachably mounted and allows clean air to flow inside;
A suction nozzle for sucking the captured dust while moving along the surface of the filter;
The said filter is comprised with the raising cloth which the fine fiber raised on the surface of the base fabric, The dry-type dust collector characterized by the above-mentioned. In the dry dust collector according to claim 1,
The dry dust collector, wherein the filter mounting member is a rotating member. In the dry dust collector according to claim 1 or 2,
The filter mounting member is a cylindrical drum that attaches the filter to a peripheral surface in a cylindrical shape that can rotate around an axial center;
The dry dust collector, wherein the suction nozzle is configured to reciprocate in the axial direction of the shaft center along the surface of the filter. In the dry dust collector according to claim 3,
The cylindrical drum extends in the horizontal direction,
A dry dust collector, wherein the cylindrical drum has a diameter of 1 to 3 m, and the cylindrical drum has an axial length of 1 to 7 m. A dry dust collector according to any one of claims 1 to 4,
A dust collection chamber into which exhaust air containing dust generated in a farming facility is sent and the dry dust collector is installed;
A discharge path for discharging clean air flowing from the inside of the filter mounting member to the outside of the dust collection chamber;
A concentration collection device for removing suction air containing dust sucked by the suction nozzle;
A collection unit for collecting the dust that has been removed; and
A dry dust collection system, comprising: a delivery path for sending the dust removal air removed by the concentration collection device into the dust collection chamber. In the dry dust collection system according to claim 5,
The dry dust collection system, wherein the concentration collection device is a cyclone dust remover for dropping dust from suction air by centrifugation. In the dry type dust collection system according to claim 5 or 6,
There is a primary settling chamber to which exhaust air containing rice husks and dust generated in farming facilities is sent,
The dry dust collection system, wherein the dust collection chamber is configured to send exhaust air in which the contaminants are settled in the primary sedimentation chamber. In the dry type dust collection system according to claim 5 or 6,
The dust collection chamber and a primary settling chamber into which exhaust air containing dust such as sawdust generated in a farming facility is integrated to form an integrated space,
In the integrated space, a settling space for sinking foreign substances is formed on the lower side, and the dry dust collecting device is arranged on the upper side of the settling space.

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