JP4271518B2 - Connection mechanism between vibration conveying device and non-vibrating device connected thereto, connection method, vibration conveying device, and pre-melting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection mechanism, a pre-melting treatment facility, and a connection mechanism connection method, and more specifically, a connection mechanism at a connection point between a vibration transfer device capable of transferring powder and a non-vibration device connected to the vibration transfer device. The present invention relates to a melting pretreatment facility using the same and a connection method of a connection mechanism.
[0002]
[Prior art]
Conventionally, incineration ash such as incineration main ash and lid ring (falling ash) generated from various incineration facilities is transported to the ash pit via a flight conveyor as a wet transfer method, and then the ash in the ash pit is removed by a crane or the like. Used to be transported to the final disposal site by ash truck. However, in recent years, it is difficult to secure a final disposal site, and as a result, many ash melting methods have been adopted to reduce the amount of final discharge as well as sanitary treatment of waste.
[0003]
In the ash melting method, the incineration ash generated from various incineration facilities is subjected to a pretreatment stage in which the metals contained in the incineration ash are sorted and removed, or the incineration ash is adjusted to a shape that is easy to melt, It is transported to the incineration ash storage tank of the ash melting furnace facility. The incineration ash storage tank functions as a cushion tank for the incineration ash to be charged into the melting furnace.
[0004]
In that case, since incinerated ash may contain harmful substances such as dioxin, when pre-treating the incinerated ash, these are powders, so that harmful substances do not scatter outside. In addition, the entire pretreatment facility is made a closed system, and the incinerated ash is transported to the downstream ash melting facility. In order to transport the incineration ash, each company's transport equipment is used. Especially, in the joint place provided at the connection place with the vibration equipment such as the vibration conveyor, as shown in FIG. Is adopted.
[0005]
The seal canvas 100 is generally formed of a cloth having a rectangular bellows shape or a cylindrical shape according to the shape of the vibration conveyor 1 and the downstream duct 2 and having an uneven bellows structure. While the expansion and contraction are repeated by the vibration in the direction of arrow R, the sealing function can be maintained at the connection location (for example, Patent Document 1).
[0006]
For example, the seal canvas 100 is disposed at a connection location between the upstream vibration conveyor 1 and the downstream downstream duct 2 in the incineration ash melting pretreatment facility, and projects to the outer periphery of the vibration conveyor 1. Between the flange 1a and the flange 2a projecting from one end side edge of the downstream duct 2, and fixed by a fixing tool 3 comprising a bolt and a nut. The powdered incineration ash is conveyed in the direction of the arrow RA while being vibrated by the vibration conveyor 1, and is further conveyed to the downstream side inside the pipe maintained at a negative pressure by a downstream exhaust fan (not shown). Is done.
[0007]
[Patent Document 1]
Description of [0031] of JP-A-8-94046, FIG.
[0008]
[Problems to be solved by the invention]
However, the seal canvas 100 shown in FIG. 5 is low in durability against repeated vibrations, and even if the canvas material is configured using various materials such as those made of pig skin or heat resistant cloth having higher strength. Damage was inevitable after about a month of use. Since the granular material conveyed inside is not clean air but incineration ash, the incineration ash is likely to be accumulated in the recesses of the seal canvas 100. In such a state, when the seal canvas 100 is repeatedly stretched and compressed in a short cycle, damage due to wear and friction of the seal canvas 100 is likely to proceed and breaks in about one month. Once the seal canvas 100 is damaged, a positive pressure is locally generated due to the structure of the bellows structure with repeated operations of expansion and contraction, so that incineration ash containing harmful substances may be scattered from the damaged portion to the outside. , Remarkably pollutes the environment and has a detrimental effect not only on workers but also on the surrounding environment. For this reason, there has been a strong demand for the development of more durable connection means.
[0009]
Therefore, in view of the above-described problems of the prior art, an object of the present invention is to provide a highly durable connection mechanism used for a vibration system conveying apparatus, a melting pretreatment facility using the same, and a connection mechanism connection method. It is to provide.
[0010]
[Means for Solving the Problems]
The above object can be achieved by the inventions described in the claims. That is, the characteristic configuration of the connection mechanism between the vibration conveyance device according to the present invention and the non-vibration device connected thereto is a vibration capable of repeatedly expanding and contracting by vibration in the conveyance direction and conveying the granular material by the vibration. An elastic member having an overhanging portion on the outer peripheral surface of either the conveying device or the non-vibrating device connected thereto, and having the other end as a free end on the inner peripheral surface of the non-vibrating device or the vibrating conveying device connected thereto A labyrinth structure is formed by the elastic member and the overhang portion, the outer peripheral end of the overhang portion is not in contact with the elastic member, and the elastic member of the free end has the overhang portion on both sides. And the overhanging portion can be in contact with elastic members on both sides .
[0011]
According to this configuration, by adopting a labyrinth structure at the connection location between the vibration conveyance device and the non-vibration device connected thereto, the connection location can be configured to be non-contact or almost non-contact. As described above, since the seal canvas that is repeatedly stretched and compressed in a short cycle is not provided and damage due to wear hardly occurs, the durability is remarkably increased. Nevertheless, when the granular material such as incinerated ash is conveyed to a negative pressure together with a fluid such as air, it is reliably prevented from being discharged to the outside due to the presence of the labyrinth structure. In addition, the labyrinth structure can be employed regardless of the horizontal direction and the vertical (vertical) direction, and thus has a wide application range and is practical. In particular, even when the expansion and contraction are repeated by the vibration in the direction of the arrow R (conveyance direction) of the vibration conveyor 1 (vibration conveyance device) as shown in FIG. 5, by configuring the labyrinth structure as in the present invention, It is possible to reliably prevent the particles from being discharged to the outside in a state where damage due to wear is unlikely to occur.
[0012]
As a result, it was possible to provide a highly durable connection mechanism used in a vibration-type transfer device.
[0013]
The upstream outer diameter of the vibration conveyance device or non-vibration device is configured to be smaller than the outer diameter of the downstream non-vibration device or vibration conveyance device opposite to the upstream, The end portion of the vibration conveying device or the non-vibrating device is inserted inside the end portion of the non-vibrating device or the vibrating conveying device on the downstream side with an overlap, and the end of the non-vibrating device or the vibrating conveying device on the downstream side. The labyrinth structure is formed by the inner peripheral surface of the unit and the outer peripheral surface of the vibration conveying device or the non-vibrating device corresponding to the upstream side, and negative pressure is formed inside the vibration conveying device from the downstream side. it is preferable to have.
[0014]
According to this configuration, it is possible to reliably prevent the powder particles from accumulating on the outer peripheral portion corresponding to the overlapping portion of the upstream vibration conveyance device or non-vibration device, further enhancing the durability of the connection mechanism, and maintaining it. Work frequency can be reduced. In addition, since the inside of the vibration transfer device and the non-vibration device is maintained at a negative pressure, incineration is coupled with the fact that the downstream end of the vibration transfer device is inserted inside the non-vibration device in a state where there is an overlap. Ash does not leak out from the connection mechanism of the labyrinth structure formed by the overhanging portion and the elastic member.
[0015]
The present invention also relates to a vibration conveying device that can repeatedly expand and contract by vibration in the conveying direction and convey the granular material by the vibration, and has a labyrinth structure in a connection mechanism with a non-vibrating device connected thereto. The labyrinth structure is provided on the outer peripheral surface of either the vibration conveying device or the non-vibrating device, and on the inner peripheral surface of the end of the non-vibrating device or the vibration conveying device to be connected. It is formed by an elastic member provided with an end as a free end, the outer peripheral side tip of the overhanging portion is not in contact with the elastic member , and the elastic member of the free end holds the overhanging portion from both sides It is arrange | positioned and the said overhang | projection part can contact the elastic member of both sides, It is characterized by the above-mentioned.
[0016]
According to this configuration, it is possible to provide a vibration transfer device using a connection mechanism that can reduce the number of wear portions as much as possible with respect to the vibration of the vibration transfer device and has a higher durability.
[0017]
In addition, the characteristic configuration of the pre-melting treatment facility according to the present invention includes a dryer for drying the powder, a sorting machine for sorting the dried powder, and a powder from the dryer to the sorting machine. Vibration conveying device used for conveying the body, storage tank for storing the selected granular material , air exhaust means capable of supplying air into the system and forming negative pressure, and the vibration conveying device and the non-vibrating device The connection mechanism according to claim 1 or 2 is provided at a connection point with the sorter, and the inside of the vibration transfer device and the non-vibration device is maintained at a negative pressure .
[0018]
According to this configuration, it is possible to provide a pre-melting treatment facility having a highly durable connection mechanism used for a vibration-type transfer device, and to reduce the processing cost of the facility. In addition, this melting pretreatment facility is substantially composed of a closed process from a drying process to a sorting process, a conveying process, and a storing process. The treated powder is prevented from scattering outside.
[0019]
Furthermore, the characteristic configuration of the connection method between the vibration transfer device according to the present invention and the non-vibration device connected thereto is capable of repeatedly expanding and contracting due to vibration in the transfer direction and transferring the granular material by the vibration. At the connection point between the vibration conveyance device and the non-vibration device connected to the vibration conveyance device, an overhang is provided on the outer peripheral surface of either the vibration conveyance device or the non-vibration device located on the upstream side. Is provided on the outer peripheral surface of the end portion of the non-vibration device or the vibration transfer device located on the downstream side to form a labyrinth structure with the elastic member and the overhanging portion , The outer peripheral end of the overhanging portion is arranged so as not to contact the elastic member, and the elastic member at the free end is arranged so as to sandwich the overhanging portion from both sides, so that the overhanging portion can contact the elastic members on both sides It is to be.
[0020]
According to this configuration, it is possible to provide a connection method between a highly durable vibration transfer device used in a vibration type transfer device and a non-vibration device connected thereto .
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic overall process of a melting pretreatment facility as an example using the connection mechanism according to the present embodiment.
[0022]
First, incineration ash (hereinafter, sometimes simply referred to as “incineration ash”), which is a kind of granular material composed of the main ash of the incineration facility and the re-drilling from the incineration facility, is dispersed in the disperser 4a provided at the inlet. Are put into the ash pit 4 while being dispersed. The introduced incineration ash is made into wet ash by appropriately adding moisture, a neutralizing agent, etc., and then introduced into the wet ash input hopper 5 by the crane 4b and further fed to the wet ash input conveyor 6 for incineration. It is sent to the ash dryer 7. Note that fine powder is returned to the ash pit 4 when fed from the wet ash charging hopper 5 to the wet ash charging conveyor 6.
[0023]
Hot air is sent to the incineration ash dryer 7 from the hot air generating furnace 8 by the forced air blower 9, and the incineration ash is thereby dried. The incineration ash dried by the incineration ash dryer 7 is fed to the first dry ash conveyor 10, and the fine powder generated from the incineration ash dryer 7 is collected by the cyclone 11. It is fed to the first dry ash conveyor 10. FIG. 12 is an induction fan for feeding fine powder to the cyclone 11, and considering that fine ash is contained in the gas discharged from the induction fan 12, the exhaust gas is It is fed to a fly ash dust collector (not shown).
[0024]
The dried ash is further fed to the second dry ash conveyor 13 on the downstream side, and is conveyed to the magnetic separator 14 which is a non-vibrating device via the first vibrating conveyor 15 which is one type of vibration conveying device. . Incinerated ash does not leak to the outside on the outlet side of the second dry ash conveyor 13 and the inlet side of the first vibrating conveyor 15, and on the outlet side of the first vibrating conveyor 15 and the inlet side of the magnetic separator 14. Thus, the connection mechanism C shown in FIG. 2 is provided. Among these, FIG. 2 shows the latter case in a cross-sectional structure, and details of the connection mechanism C will be described later.
[0025]
Mainly iron-based foreign matter selected by the magnetic separator 14 is fed to the magnetic material conveyor 16 that conveys the magnetic material, and the incineration ash from which the iron-based foreign material has been removed is fed to the second vibrating conveyor 17. Is done. Here, the connection mechanism C shown in FIG. 2 is provided on the inlet side and the outlet side of the second vibrating conveyor 17. Unlike the first vibratory conveyor 15, the second vibratory conveyor 17 is not shown, but an incineration ash sorting screen is provided at the lower part of the conveyor, so that screening is performed according to the size of the incineration ash particle size. ing. The incinerated ash having an appropriate particle size is dropped downward, and the remaining iron-based foreign matter is again selected by the magnetic separator 14, and the iron-based foreign matter is fed to the magnetic material conveyor 16. The incinerated ash from which iron-based foreign matter has been removed is fed to the third incinerated ash conveyor 18. The incineration ash remaining without being screened by the incineration ash sorting screen of the second vibrating conveyor 17 is fed to the first return conveyor 19 and further fed to the clinker crusher 21 by the second return conveyor 20. The incinerated ash is crushed so as to have an appropriate particle size, and the crushed incineration ash is fed to the second dry ash conveyor 13.
[0026]
The incineration ash fed to the third incineration ash conveyor 18 is further subjected to separation and removal of the remaining iron-based foreign matter by the magnetic separator 14, and the iron-based foreign matter is fed to the magnetic material conveyor 16, The incineration ash from which iron-based foreign matter has been removed is fed to the fourth incineration ash conveyor 22, and then further fed to the fifth incineration ash conveyor 23 to be put into the melting furnace. It is put into the storage tank 24. The incineration ash charged into the incineration ash storage tank 24 is fed to various melting furnaces, and the contained dioxins are made harmless. The iron-based foreign material fed to the magnetic material conveyor 16 is accommodated in the magnetic material pit 25 and collected as a valuable material.
[0027]
The above-mentioned melting pretreatment equipment is substantially constituted by a closed system so that ash is not scattered outside. Further, in order to prevent the ash from scattering to the outside by setting the inside of the system to a negative pressure, a pretreatment facility exhaust fan 26 as an exhaust means is provided and the ash is removed from the exhausted gas. The bag filter 27 is provided on the upstream side of the pretreatment facility exhaust fan 26. Although not shown, an intake port for taking in fresh air from the outside is provided inside the system while maintaining the inside of the system at a negative pressure by the pretreatment facility exhaust fan 26, and the intake air and the exhaust by the exhaust fan are provided. Stable negative pressure can be obtained by draft balance with wind. The ash collected by the bag filter 27 is fed to the ash conveyor.
[0028]
Next, the connection mechanism C will be described. As shown in FIG. 2, this connection mechanism C is provided between a vibration conveying device A having a square tube shape and a non-vibrating device B having a somewhat larger diameter than that of the non-vibrating device B. Thus, the incineration ash is conveyed in the direction of the arrow RA. The downstream end of the vibration transfer device A is inserted inside the non-vibration device B in a state having an overlap allowance, and coupled with the negative pressure inside, the reverse flow of the incineration ash is prevented and vibration transfer is performed. It is possible to reliably prevent incineration ash from accumulating on the outer peripheral portion corresponding to the overlapping portion of the device A or leaking to the outside. As a result, the durability of the connection mechanism C can be further increased and the maintenance work frequency can be reduced. The length of the overlap margin portion is preferably about 200 to 300 mm.
[0029]
A protruding portion A1 is provided on the outer periphery of the outlet side end portion of the vibration transfer device A, and a protruding edge B1 is formed at the inlet side end portion of the non-vibrating device B, and this protruding edge B1. The flat portion B2 having a large-diameter rectangular tube shape is attached by welding or the like. Further, an angle member B3 having an L-shaped cross section is attached to the front end side of the flat portion B2 by welding or the like, and attached to a fixing tool B4 made of a bolt, a nut, or the like at the end of the angle member B3. A rubber member B5, which is a kind of elastic member, is arranged with the other end as a free end. The distal end on the outer peripheral side of the overhanging portion A1 is located on the inner peripheral side from the expanded large-diameter rectangular tube-shaped flat portion B2, and is also neutral on the rubber member B5 attached to the fixing tool B4. At the position, it does not come into direct contact (non-contact structure), and the labyrinth structure is formed by these overhang portions A1 and the rubber member B5. Note that the overhang edge B1, the flat portion B2, the angle member B3, and the like are not necessarily separate bodies, and may be formed integrally from the beginning and attached to the non-vibration device B.
[0030]
As the rubber member B5, chloroprene rubber (trade name: neoprene rubber), urethane rubber, styrene butadiene rubber (SBR), or the like can be used. The shape, size, and the like of the rubber member B5 are not particularly limited as long as the above configuration is provided, but those having a thickness of about 3 to 5 mm can be used. One end of the rubber member is fixed by the fixing tool B4, but the other end is extended to a position where it does not touch the outer peripheral portion of the vibration transfer device A, and is arranged so as to sandwich the protruding portion A1 from the front and rear. Has been. And even if the overhanging portion A1 is in contact with the rubber member B5 on both sides against the vibration of the vibration conveying device A, the rubber member B is an elastic member, so that wear and friction are hardly generated, and there is no problem. Both are preferably non-contact or slightly in contact. In any case, the connection mechanism C of this embodiment is not like a seal canvas that is repeatedly expanded and compressed in a short cycle as in the prior art, so damage due to wear and friction is unlikely to occur. Durability will increase dramatically.
[0031]
Moreover, the incineration ash is sent in the direction of the arrow RA by the pre-treatment facility exhaust fan 26, and the inside of the vibration transfer device A and the non-vibration device B is maintained at a negative pressure. In combination with the fact that the side tip is inserted inside the non-vibrating device B in a state having an overlap, incineration ash leaks out from the connection mechanism C of the labyrinth structure by the overhang portion A1 and the rubber member B5. Absent.
[0032]
Further, specific examples employing the connection mechanism C are shown in FIGS. FIG. 3 shows an example in which the connection mechanism of the present embodiment is used at the upstream and downstream ends of the vibration conveyor A. Incinerated ash is transported together with air in the direction of arrow RA from the upstream side, and is branched and fed to the return conveyor and the magnetic separator on the downstream side of the vibration conveyor A. As described above, the connection mechanism of the present embodiment can be used in both the horizontal position and the vertical (vertical) position, and has a wide application range and is practical.
[0033]
FIG. 4 shows an example in which a magnetic separator D is connected to the downstream side of the vibrating conveyor A. The magnetic material is sorted by the magnetic separator and sent to the magnetic material conveyor, and the other incineration ash is sent to the sorting screen. It is like that.
[0034]
【Example】
A continuous test was carried out by adopting the connection mechanism of the above embodiment at the connection point between the vibration conveyor and the non-vibration device that can be used in the melting pretreatment facility shown in FIG. When an exhaust fan with a wind exhaust specification of about 200 m ³ / min and -20 hPa is used and when it is continuously operated for 6 months on a vibration conveyor with a frequency of 500 cpm / min and an amplitude of 15 mm, some external damage is observed in the connection mechanism. There was no leakage of incinerated ash to the outside.
[0035]
[Another embodiment]
(1) In the said embodiment, although the example of the fusion | melting pretreatment equipment was given as an example using the connection mechanism, application of the connection mechanism of this invention is not limited to this, The vibration which conveys a granular material It can be used in other equipment that has a connection between the conveying device and the non-vibrating device. Also, the powder is not limited to incinerated ash, but various pharmaceuticals, foods, chemical industrial products, castings Can target sand. In that case, an inert gas such as nitrogen may be passed instead of air as the gas to be conveyed together with the granular material.
[0036]
(2) The cross-sectional shape of the vibration conveyance device may be a cylindrical shape or a square tube shape, and the cross-sectional shape of the non-vibration device connected thereto is the same.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an overall overall process of a melting pretreatment facility as an example using a connection mechanism according to the present invention. FIG. 2 is a partial cross-sectional view illustrating a connection mechanism according to the present invention. FIG. 4 is a partial cross-sectional view showing another arrangement example of the connection mechanism according to the present invention. FIG. 5 is a schematic cross-sectional view showing the connection mechanism of the prior art. Explanation】
26 Exhaust means A Vibratory conveying device A1 Overhanging portion B Non-vibrating device B5 Elastic member C Connection mechanism

Claims (5)

A stretched part is provided on the outer peripheral surface of either a vibration transfer device that can repeatedly expand and contract by vibration in the transfer direction, and the powder can be transferred by this vibration, or a non-vibration device connected to this, and connected to this. The elastic member having the other end as a free end is provided on the inner peripheral surface of the non-vibrating device or the vibration conveying device, the labyrinth structure is formed by the elastic member and the protruding portion, and the outer peripheral side of the protruding portion The distal end is not in contact with the elastic member, the elastic member at the free end is arranged so as to sandwich the overhanging portion from both sides, and the overhanging portion can contact the elastic member on both sides. A mechanism for connecting a vibrating conveying device to a non-vibrating device connected thereto . The upstream outer diameter of the vibration conveyance device or non-vibration device is configured to be smaller than the outer diameter of the downstream non-vibration device or vibration conveyance device opposite to the upstream, The end portion of the vibration conveying device or the non-vibrating device is inserted inside the end portion of the non-vibrating device or the vibrating conveying device on the downstream side with an overlap, and the end of the non-vibrating device or the vibrating conveying device on the downstream side. The labyrinth structure is formed by the inner peripheral surface of the unit and the outer peripheral surface of the vibration conveying device or the non-vibrating device corresponding to the upstream side, and negative pressure is formed inside the vibration conveying device from the downstream side. The connection mechanism between the vibration conveying device according to claim 1 and a non-vibration device connected thereto . A vibration conveyance device that can repeatedly expand and contract by vibration in the conveyance direction and convey a granular material by the vibration, and uses a labyrinth structure as a connection mechanism with a non-vibration device connected thereto, and the labyrinth The structure includes an overhang provided on the outer peripheral surface of either the vibration conveying device or the non-vibrating device, and the other end on the inner peripheral surface of the end of the non-vibrating device or the vibration conveying device to be connected as a free end. The elastic member at the outer peripheral side of the overhanging portion is not in contact with the elastic member, and the elastic member at the free end sandwiches the overhanging portion from both sides, and the overhanging The vibration conveying apparatus characterized in that the portion can contact the elastic members on both sides. A dryer for drying the granular material, a sorting device for selecting the dried granular material , a vibration conveying device for conveying the granular material from the dryer to the sorting device, and the selected granular material In a pre-melting treatment facility having a storage tank for storing a body and air exhaust means capable of supplying air into the system and forming a negative pressure, a connection point between the vibration conveying device and a sorter which is a non-vibrating device 3. A pre-melting treatment facility comprising the connection mechanism according to claim 1 or 2 , wherein the inside of the vibration conveying device and the non-vibration device is maintained at a negative pressure . Vibration conveyance located on the upstream side at the connection point between the vibration conveyance device that can repeatedly expand and contract by vibration in the conveyance direction, and convey the powder by the vibration, and the non-vibration device connected to this vibration conveyance device An overhanging portion is provided on the outer peripheral surface of either the device or the non-vibration device, and the elastic member that sandwiches the overhanging portion from both sides is surrounded by the outer peripheral surface of the end portion of the non-vibration device or the vibration transfer device. The elastic member and the overhanging portion form a labyrinth structure, the outer peripheral end of the overhanging portion is not in contact with the elastic member, and the elastic member of the free end has the overhanging portion. A method for connecting a vibration conveying device and a non-vibrating device connected thereto, wherein the protruding portion is disposed so as to be sandwiched from both sides, and the overhanging portion can contact elastic members on both sides .

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