JP2004017017A - Molten matter mixing distributor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molten matter mixing distributor equipped with both of a function for mutually mixing incineration ash and fly ash generated accompanied by incineration and a function for supplying mixed ash so as to distribute the same to a plurality of hoppers arranged in the periphery of the upper part of a melting furnace on the downstream side. <P>SOLUTION: A center shaft 5 is vertically provided in a casing 2 downwardly in a rotatable manner and rotary blades 6 are horizontally attached to the center shaft 5 while a plurality of ash discharge ports 12 are attached to the lower part of the casing 2. These ash discharge ports 12 are connected to a plurality of hoppers arranged in the periphery of the upper part of the melting furnace. Damper devices 15 for individually driving the ash discharge ports 12 on the basis of the demand from the hoppers or an ash supply device so as to open and close them are attached. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a melt mixing and distributing machine that mixes incinerated ash generated during incineration and a melt such as fly ash and distributes the mixed ash to a plurality of ash supply devices.
[0002]
[Prior art]
BACKGROUND ART Conventionally, a method of melting and solidifying a molten material such as incinerated ash or fly ash generated by incineration of municipal solid waste using an ash melting furnace has been frequently used. By using such a melting treatment method, it is possible to reduce the volume of the melt, prolong the life of the final disposal site, prevent the decomposition of dioxins contained in the melt, and prevent the elution of heavy metals. Detoxification has been achieved.
[0003]
By the way, when the above-mentioned melt (incineration ash and fly ash) is supplied to an ash melting furnace, if the incineration ash and the fly ash are not properly mixed, the basicity of the melt locally increases and the ash There is a risk of damaging the refractory of the melting furnace. This tendency is particularly concerned in a fuel-type surface melting furnace. Therefore, conventionally, a melt mixer is installed before entering an ash supply device attached to an ash melting furnace, so that incineration ash and fly ash are sufficiently mixed in advance.
[0004]
An ash supply rotary chute is disposed below the melt mixer, and the ash supply rotary chute distributes the mixed ash to a plurality of hoppers disposed around an upper portion of the ash melting furnace. It is supplied into the ash melting furnace by an ash supply device provided correspondingly.
[0005]
FIG. 2 shows an overall schematic diagram of a conventional apparatus in which a melt mixer and an ash supply rotary chute are combined.
[0006]
As shown in the figure, below the ash conveyor 100 that transports incinerated ash and fly ash (melt) generated by incineration, a melt mixer 101 that mixes the incinerated ash and fly ash is arranged. Below the ash melt mixer 101, the mixed ash supplied from the ash melt mixer 101 is supplied to a plurality of ash supply devices (not shown) attached to an ash melting furnace (not shown). An ash supply rotary chute 120 is arranged and supplied to the ash supply rotary chute.
[0007]
The melt mixer 101 has a casing 102 having a cylindrical body, and the incineration ash and fly ash conveyed from the mixed ash conveyor 100 are placed inside the casing 102 at an upper portion of the casing 102. A top plate 104 having an ash inlet 103 for introducing the ash into the ash is attached. A bottom plate 106 having an ash outlet 105 for supplying mixed ash (a mixture of incinerated ash and fly ash) inside the casing 102 to an ash supply rotating chute 120 below is provided at a lower portion of the casing 102. .
[0008]
A rotating blade 109 is rotatably arranged inside the casing 102, and the rotating blade 109 is provided outside the casing 102 by pulleys 112 ′ and 108 ′, a belt 111, a speed reducer 108, and a rotating member 107. An electric motor 112 that is driven to rotate via the motor is provided.
[0009]
An ash duct 113 is attached to a lower portion of the casing 102 so as to surround the ash outlet 105. Inside the ash duct 113, an opening / closing shutter 114 is rotatably provided. The opening and closing of the ash outlet 105 can be switched by rotating the opening and closing shutter 114 in the ash duct 113.
[0010]
On the other hand, the ash supply rotary chute 120 has a cylindrical body, a casing 123 having a conical bottom 121 and a top plate 122, and a bent tube 124 rotatably supported by the top plate 122. ing. The lower end of the ash duct 113 of the melt mixer 101 is inserted into the upper opening of the bent tube 124, and a sprocket 124 'is integrally attached to the edge of this opening. On the other hand, the lower half of the bent tube 124 is bent along the slope of the bottom 121 in the middle so as not to contact the bottom 121.
[0011]
An electric motor 128 for driving the distorted tube 124 is provided on a top plate 122 of the casing 123 via a speed reducer 126, sprockets 126 ′, 124 ′, and a chain 127. The lower part of the bent tube 124 is configured to pivot inside the casing 123.
[0012]
Further, a plurality of ash outlets 129 are provided at the lower end of the body of the casing 123, and these ash outlets 129 are respectively provided to a plurality of hoppers arranged around the upper part of the ash melting furnace. It is connected.
[0013]
In the conventional apparatus configured as described above, incineration ash and fly ash are sequentially introduced into the casing of the melt mixer 1, and the rotary wing 109 is rotated to sufficiently mix the incineration ash and fly ash. I do.
[0014]
When the storage amount of any of the hoppers falls below a certain value, the motor 128 is driven to direct the lower opening of the bent tube 124 to the ash discharge port 129 connected to the target hopper, and the ash duct The opening / closing shutter 114 arranged in the opening 113 is driven to open, the ash outlet 105 is opened, and the supply of the ash in the casing 102 is started.
[0015]
The mixed ash supplied in this manner sequentially passes through the ash outlet 105, the ash duct 113, and the distorted pipe 124 of the ash supply rotary chute 120, slides down the slope of the bottom 121, and then passes through the ash discharge port 129 to the desired position. Supplied to hopper. The mixed ash supplied to the hopper is then supplied to a melting furnace by an ash supply device below the hopper to be converted into slag.
[0016]
[Problems to be solved by the invention]
However, such a conventional apparatus requires two devices, the melt mixer 101 and the ash supply rotary chute 120, so that the device itself becomes large and a large installation space is required. .
[0017]
Further, in the ash supply rotary chute 120, the lower part of the distorted pipe 124 is swung so that the lower opening of the distorted pipe 124 is directed to the ash discharge port 129 connected to a predetermined hopper. Mixed ash cannot be supplied simultaneously to the hopper and the ash supply device below the hopper. Therefore, there is a problem that when the storage amounts of the hoppers at a plurality of locations become equal to or less than a certain value, it is impossible to cope with such a situation.
[0018]
The present invention has been made to solve such problems, and has a function of mixing incinerated ash and fly ash, and a function of simultaneously distributing and supplying mixed ash to an arbitrary number of ash supply devices. It is an object of the present invention to provide a melt mixing and dispensing machine provided.
[0019]
[Means for Solving the Problems and Functions / Effects]
To achieve the above object, the melt mixing and dispensing machine according to the present invention comprises:
In the cylindrical casing into which the melt is charged, a mixing blade that is rotated around a vertical rotation axis is provided, and a plurality of ash discharge ports that communicate with an ash supply device are provided in a bottom plate of the casing, and A discharge damper for individually opening and closing each discharge port is provided.
[0020]
According to the present invention, by mixing the molten material inside the casing by rotating the mixing blade, and individually opening and closing a plurality of ash outlets provided in the bottom plate, the ash that communicates the mixture to each ash outlet is provided. Since the ash is configured to be distributed to and supplied to the supply device, the mixed ash can be simultaneously supplied to the plurality of ash discharge devices by opening the plurality of ash discharge ports. In addition, since the mixing of the melt and the distribution of the mixed ash can be performed by a single device, the configuration of the device can be made smaller than that of the conventional device.
[0021]
In the present invention, it is preferable that the mixing blade includes a rotary blade radially attached to the rotary shaft and an outer peripheral rotary ring communicating a tip end of each rotary blade. By attaching a plurality of plate-shaped members to the rotating shaft, the efficiency of mixing incineration ash and fly ash can be improved. Further, the strength of each plate-like member can be increased by the outer peripheral rotating ring that connects the tips of the rotating blades.
[0022]
Preferably, the discharge damper is opened in response to a request from a downstream ash supply device. In this way, the mixed ash can be reliably supplied to an appropriate ash supply device.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, specific embodiments of the melt mixing and distributing machine according to the present invention will be described with reference to the drawings.
[0024]
FIG. 1A is a longitudinal sectional view (left half) and a front view (right half) of a melt mixing and dispensing machine according to the present embodiment, and FIG. 1B is a melt mixing and dispensing machine. Are respectively shown in a top view.
[0025]
The melt mixing and dispensing machine 1 according to the present embodiment is disposed above an ash melting furnace (not shown). A plurality of hoppers are provided around the upper part of the ash melting furnace, and an ash supply device for supplying mixed ash in the hoppers to the melting furnace is provided below each hopper. These hoppers or ash supply devices are provided with sensors for detecting the amount of mixed ash stored in the hopper. When the storage amount inside the hopper becomes equal to or less than a certain value, an electric signal (request signal) for requesting the supply of the mixed ash is provided. Each is configured to emit an electric signal (stop signal).
[0026]
The melt mixing and distributing machine 1 disposed above the ash melting furnace includes a casing 2 having a cylindrical body and a bottom plate, and the casing 2 has a cover 3 covering an upper opening thereof. Is attached. At the center of the casing 2, a center shaft (rotating shaft) 5 is rotatably supported vertically downward so as to penetrate the lid 3, and at the lower end of the center shaft 5, four plates are provided. The rotary blades 6 are arranged horizontally and in a cross shape and attached. An outer peripheral rotating ring (annular member) 7 whose outer diameter is slightly smaller than the inner diameter of the casing 2 is disposed inside the casing 2, and the inner peripheral portion of the annular rotating ring 7 It is fixed to the tip of. Thus, each rotating blade 6 is reinforced by the outer circumferential rotating ring 7.
[0027]
A reducer 8 that rotatably supports the center shaft 5 is provided on the upper surface of the lid 3. The reducer 8 is provided with the center shaft 5, the rotary blade 6, An electric motor 9 for rotating the outer peripheral rotating ring 7 around a vertical axis is provided. An ash inlet 10 is provided near the outer periphery of the lid 3, and a casing of the ash conveyor 30 is connected to the ash inlet 10. Thus, the incinerated ash and fly ash generated during the incineration are conveyed by the ash conveyor 30 and introduced into the internal space of the casing 2 through the ash inlet 10, and are then rotated by the rotating blades 6 and the outer peripheral rotating ring 7. It is intended to mix with each other.
[0028]
On the other hand, near the outer periphery of the bottom plate of the casing 2, a plurality of (in this embodiment, eight) ash discharge ports 12 connected to a plurality of (in the present embodiment) rectangular discharge paths 11 are arranged in the circumferential direction. The discharge path 11 connected to each of the ash discharge ports 12 is configured to protrude downward of the casing 2, and the lower part of each of the discharge paths 11 is connected to each of the ash discharge ports 12 and the upper part of the downstream melting furnace. Connection members 13 for connecting a plurality of hoppers arranged around the periphery are attached so as to cover the lower opening of the ash discharge path 11.
[0029]
Each of the connection members 13 has a lower portion forming a slope facing obliquely outward, and the mixed ash of the casing 2 is supplied into the connection member 13 from the lower end opening of the ash discharge passage 11. At this time, the mixed ash is configured to slide down to the lower hopper by its own weight.
[0030]
Further, each connection member 13 is provided with a damper device 14 for individually opening and closing the lower opening of the discharge path 11. The damper device 14 is rotatably supported inside the connection member 13, and has a damper 15 whose rotation shaft 15 ′ projects outside the connection member. A driving unit (air cylinder) that is rotatably supported by a protruding portion 16 protrudingly provided at the lower central portion, and supported by a rotating shaft 15 ′ of a damper 15 whose L-shaped tip protrudes outside the connecting member 13. 17). Then, by driving the driving section (air cylinder) 17 to rotate the damper 15 in the connecting member 13, the opening and closing of the discharge path 11 are performed.
[0031]
An inspection port 18 is provided in the body of the casing 2 so that maintenance inside the casing 2 can be performed.
[0032]
According to the melt mixing and distributing machine 1 configured as described above, the electric motor 9 is driven to rotate the rotary blades 6 and the outer peripheral rotating ring 7 around the axis of the center shaft 5. A melt (incinerated ash and fly ash) introduced from the ash conveyor 30 is introduced into the inside 2 and the melt is mixed.
[0033]
When the storage amount of the mixed ash (mixture of incinerated ash and fly ash mixed by the rotary blades 6) of the hopper or the ash supply device becomes equal to or less than a predetermined value, and a request signal is transmitted from the hopper or the ash supply device. Drives the damper device 14 of the connection member 13 connected to the hopper from which the request signal is transmitted, opens the lower opening of the discharge path 11 communicating with the hopper, and supplies the mixed ash inside the casing 2. Start. The mixed ash in the casing 2 passes through the ash supply port 12, the discharge path 11, and the connecting member 13 in order, and is supplied to a target hopper. When the stored amount of mixed ash in the hopper becomes a certain value or more and a stop signal is transmitted, the damper 15 is driven to close, the discharge path 11 is closed, and the supply of mixed ash to the hopper is stopped. I do.
[0034]
When request signals are transmitted from two or more hoppers (or ash supply devices), all the discharge paths 11 communicating with those hoppers are opened. By doing so, even if the supply of mixed ash is promoted from a plurality of hoppers, the mixed ash can be supplied to those hoppers at the same time.
[0035]
The melt mixing and distributing machine 1 according to the present embodiment has two functions: a function of mixing incinerated ash and fly ash, and a function of distributing and supplying the mixture (mixed ash) to each ash supply device. . Therefore, the apparatus is more compact than the conventional apparatus which requires the use of a combination of two types of apparatuses for mixing and distributing incinerated ash and fly ash.
[0036]
In the present embodiment, the melt is mixed by a device having a very simple configuration in which a rotating blade 6 and an outer peripheral rotating ring 7 are attached to a center shaft 5 that projects vertically downward into the casing 2, Further, since each of the rotary blades 6 is reinforced by the outer peripheral rotary ring 7, the possibility that the rotary blade 6 and the outer peripheral rotary ring 7 are damaged by the mixing operation is extremely low. Further, a drive mechanism (reducer 8, electric motor 9) for driving the mixing means (rotating blade 6, outer peripheral rotating ring 7) is provided at a place outside the casing 2, which is hardly affected by the mixed ash. Therefore, the driving of the mixing means can be satisfactorily continued without causing any trouble due to the mixed ash.
[0037]
Further, since the damper device 14 is configured to be driven to open and close in response to a request from the hopper or the ash supply device on the downstream side, it is possible to quickly respond to the request for the mixed ash. And the mixed ash can be reliably supplied to an appropriate hopper.
[0038]
In the present embodiment, four rotating blades 6 are attached to the center shaft 5 in a cross shape. However, the number and the manner of attaching the rotating blades are not particularly limited. For example, eight rotating blades 6 are attached. The rotating blades may be mounted radially and horizontally.
[0039]
Further, in the present embodiment, the melt mixing and distributing machine 1 in which the eight ash discharge ports 12 are provided at the lower part of the casing has been described, but the scale of the ash supply device and the hopper disposed in the lower ash melting furnace, The number and arrangement positions of the ash discharge ports 12 may be freely changed according to various conditions such as the number of arrangements, arrangement places, and shapes. Even in such a case, it goes without saying that the same effects as those of the present embodiment can be obtained.
[Brief description of the drawings]
FIG. 1A is a longitudinal sectional view (left half) and a front view (right half) of a melt mixing and dispensing machine according to the present embodiment, and FIG. It is a top view sectional view of a mixing and dispensing machine.
FIG. 2 is a schematic explanatory view of a conventional melt mixer (upper) and an ash supply rotary chute (lower).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Melt mixing and dispensing machine 2 Casing 3 Lid 5 Center shaft 6 Rotating blade 7 Outer rotating ring 8 Reduction gear 9 Motor 11 Supply path 12 Ash supply port 14 Damper device 15 Damper 17 Actuator (air cylinder)
30 ash conveyor

Claims (3)

In the cylindrical casing into which the melt is charged, a mixing blade that is rotated around a vertical rotation axis is provided, and a plurality of ash outlets that communicate with an ash supply device are provided in a bottom plate of the casing, and A melt mixing and dispensing machine characterized by providing a discharge damper for opening and closing each discharge port individually. The melt mixing and dispensing machine according to claim 1, wherein the mixing blade includes a rotary blade radially attached to the rotary shaft and an outer peripheral rotary ring communicating a tip end of each rotary blade. The melt mixing and dispensing machine according to claim 1, wherein the discharge damper is opened in response to a request from a downstream ash supply device.

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