JP2008023492A - Incineration ash stabilizing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a stabilizing technique using a chemical agent makes an incineration ash, contain a new substance, requires a high use cost of the chemical agent, and that a technique is not established in a method for using the dynamical viewpoint of the properties of incineration ash or the properties contained in an incineration process. <P>SOLUTION: A rotary-type cylindrical body is axially provided with a lamp cylinder to be axially operated by driving a plurality of rotary rollers, a plurality of ultraviolet lamps and infrared lamps are provided on the polygonal stand in the lamp cylinder to be controlled in rotational speed and alternately provided at an equal interval, the rotary-type cylindrical body and the lamp cylinder are axial operated and a large number of projection pieces are fixed to the inner surface wall of the lamp cylinder to uniformly accelerate the hydroxy radical effect of incineration ash. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, the incinerated ash is converted into a hydroxy radical effect by wave energy of light (hydroxy radical effect is the most reactive active oxygen, and has the strongest oxidizing power. The present invention relates to an apparatus that promotes insolubilization of heavy metals in incineration residues by combining with cations to promote stabilization.

Incineration ash (also called bottom ash) of general waste is a heavy metal contained in the incineration ash, so environmental pollution due to penetration from the waste disposal site is a problem. In addition, even when this incinerated ash is effectively used as a ground material, there is a concern about the influence of heavy metals on the soil environment. Therefore, a technique for insolubilizing heavy metals contained in incinerated ash to an environmental standard or less and performing a stabilization treatment has been put into practical use.
JP 2003-190908 A JP 2005-349351 A

  One of the conventional insolubilization techniques is a stabilization technique that uses chemicals that focus on the properties of heavy metals, and the other is a mechanical point of view that focuses on the properties of incinerated ash and is contained in the incineration process. It was a stabilization technique using properties.

  In the case of the stabilization technique with a chemical | medical agent, a stabilization process can be performed in a short time and a soil environmental standard can be satisfy | filled reliably. However, stabilization by this technology uses chemicals, so it has problems such as incineration ash containing new substances, and the cost of using chemicals impedes effective use and narrows down applications. It was.

  In addition, there is a problem that the technology has not been established for another mechanical viewpoint of the properties of the incineration ash and the stabilization technology using the properties contained in the incineration process.

  In order to achieve the above object, according to the present invention, the inclined rotary cylinder has a hollow cylindrical shape and a lamp cylinder is mounted in the hollow portion, and the rotary cylinder has a plurality of rotating rollers. It is characterized in that it is pivoted to the left and right by driving, and a plurality of ultraviolet lamps and infrared lamps are provided inside the lamp cylinder, and the incineration ash charged into the rotary cylinder can be irradiated with light uniformly.

  The invention according to claim 2 is the invention according to claim 1, wherein a plurality of ultraviolet lamps and infrared lamps are continuously attached to a polygonal lamp mount in the lamp cylinder of the hollow part of the rotary cylinder. The outer peripheral wall of the lamp tube is characterized by a transparent material structure that transmits the light rays of the ultraviolet lamp and the infrared lamp.

  According to a third aspect of the present invention, in the first aspect of the present invention, the lamp cylinder rotates in accordance with the rotation of the rotary cylinder.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, a large number of protruding pieces are fixed to the inner wall of the rotary cylinder.

  The present invention can oxidize and decompose hardly decomposable substances (such as dioxins) in incineration ash in a short time and with high efficiency.

    In the case of stabilization technology using the properties of incinerated ash, it is often used in Europe and the like because of stabilization by weathering (also called weather). This technology is air curing, and is a technology in which heavy metals of incinerated ash are oxidized and carbonated by reacting with oxygen and carbon dioxide in the air to insolubilize them.

  Stabilization can be performed with low energy and low cost compared to chemicals, and incinerated ash after stabilization has a wide range of effective use.

  However, since the inclusions are likely to change depending on the inhomogeneity of the inclusions contained in the incineration ash and the incineration situation, the technology lacks stability. Furthermore, in the case of stabilization technology by weathering, heavy metals in the incinerated ash are eluted by rainfall during the aging period, and additional treatment such as treatment of the eluted water and repair of soil contamination is required.

  Conventionally, various techniques have been developed for stabilizing dioxins in incineration ash and treating leachate leached from the incineration ash ground. However, in both cases, it has been a problem that a large amount of money is required for capital investment and drug purchase.

  In Japanese Patent Laid-Open No. 2003-190908, in an apparatus that oxidizes and decomposes a hardly decomposable substance contained in a solid material such as fly ash discharged from an incinerator, the solid material and water are mixed to form a slurry. And a cracking tank for forcibly stirring the slurry in the presence of hydroxy radicals to oxidatively decompose the hardly decomposable substance contained in the slurry, the cracking tank carrying a solid catalyst and a photocatalyst. A plurality of catalyst-carrying beads that themselves have a photocatalytic action and flow in contact with the slurry; and an ultraviolet lamp that is positioned so as to be able to irradiate the catalyst-carrying beads with light. To generate a hydroxy radical.

  In contrast to the above-described invention, the present invention directly irradiates the incinerated ash with the wave energy of light, and does not add water ash slurry or catalyst-supported beads as in the construction method described above. It differs greatly.

  In Japanese Patent Application Laid-Open No. 2005-349351, hydrogen peroxide or ozone is supplied in a reaction tower for introducing a liquid to be treated under ultraviolet irradiation by an ultraviolet lamp, or hydrogen peroxide and ozone are supplied. By alternately supplying active gas nitrogen, deoxygenated dissolved oxygen and ozone in the liquid to be treated are accelerated, and photochemical decomposition by hydroxy radicals generated in the reaction tower is promoted to shorten the reaction time, and dioxane and dioxin. At the same time we are removing.

  The present invention pays attention to the incineration ash (bottom ash) discharged from the incineration disposal site, and efficiently irradiates wave energy (ultraviolet rays and infrared rays) using this device to insolubilize heavy metals contained in the incineration ash. It is a technology to apply. Therefore, the present invention is different in that hydrogen peroxide or the like is not supplied and the purpose is not to decompose dioxane and dioxins.

  The present invention is a technique for insolubilizing heavy metals by continuously irradiating incineration ash with the wave energy of light, and can be realized at low cost without causing problems of conventional chemicals and treated water.

  In addition, salt that contains a large amount of incineration ash is insolubilized, contributing to the early stabilization of the final disposal site and the effective use of incineration ash as a construction material. It was realized by insolubilizing heavy metals and salts contained in the incineration ash easily and inexpensively to the bottom ash of the incineration ash.

Hereinafter, an incineration ash stabilization device using the wave energy of light of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a perspective view of an incineration ash stabilization device according to an embodiment of the present invention. FIG. 2 shows a front view of the incineration ash stabilization device according to the embodiment of the present invention. FIG. 3 is a front view of an arrangement diagram of the octagonal lamp mount and the irradiation lamp according to the embodiment of the present invention.

  In FIG. 1, incineration ash incinerated at a waste incineration plant in a conventional incineration plant is temporarily stored in an ash pit 13 cooled by cooling water, and then a heavy metal fixing material is added to the final disposal site. However, the present invention is carried out by the truck 12 after passing through the incineration ash stabilization device 1 and stabilizing the incineration ash 6.

  The incineration ash 6 in the ash pit 13 is poured into the incineration ash stabilization device 1 from the supply port 5 in a sticky state containing moisture.

  When a certain amount of the incineration ash 6 poured into the incineration ash stabilization device 1 flows in, the supply port 5 is closed, and the incineration ash stabilization device 1 pivots.

  A large number of protruding pieces 15 are fixed to the inner wall of the rotary cylinder 2, the protruding pieces 15 at the bottom of the rotary cylinder 2 scoop up the incinerated ash 6, and the protruding pieces 15 move to the ceiling by rotation, The incinerated ash 6 that has been scooped down falls to the bottom as the protruding pieces 15 are inclined.

  As the rotary cylinder 2 rotates, the incineration ash 6 is repeatedly scraped and dropped by the protrusions 15 to stir the incineration ash, and the wave energy is evenly irradiated to promote stabilization of the incineration ash 6.

  The incineration ash 6 is also dried by the light heat of a plurality of ultraviolet lamps 4 and infrared lamps 5 fixed to the lamp cylinder 4, and combustion heat may be blown out by a blower in order to accelerate drying.

  The sticky incineration ash 6 containing water that has been poured into the incineration ash stabilization device 1 is incinerated with the axial movement of the incineration ash stabilization device 1, the light heat of the plurality of ultraviolet lamps 4 and infrared lamps 5 and the inclined structure. The ash stabilization device 1 gradually gathers at the discharge port 14.

    The incineration ash stabilization device 1 can slide the sticky incineration ash 6 containing moisture by axially moving with an inclined structure, and a vibration motor may be installed in order to make sliding more effective.

  The incinerated ash 6 that has been processed by opening the discharge port 14 is collected by the truck 12.

  In the incineration ash stabilization device 1 of FIG. 1, the rotary cylinder 2 has a hollow cylindrical shape, and the lamp cylinder 4 is axially mounted in the hollow portion, and the rotary cylinder 2 is axially driven by driving of the rotary roller 3.

  A number of projecting pieces 15 are fixed to the inner wall of the rotary cylinder 2. For example, the projecting pieces 15 may have a long plate shape, a hook shape, or a mounting method in parallel. You may attach in steps.

  A plurality of the rotating rollers 3 are arranged on the supporting shaft 8, and the supporting shaft 8 is rotated by driving the electric motor 7, and the rotating roller 3 is interlocked so that the rotary cylinder 2 is axially moved.

  A plurality of the rotating rollers 3 are provided for axially moving the rotary cylinder 2, but the rotating rollers can be made large and rotated by one.

  The electric motor 7 can be driven forward and reverse, and therefore the rotating roller 3 and the rotary cylinder 2 that are interlocked can also rotate forward and backward.

  In addition, the electric motor 7 includes a mechanism that can freely set and control the rotation speed.

  In FIG. 2, the lamp cylinder 4 mounted in the hollow portion of the rotary cylinder 2 rotates in conjunction with the rotary cylinder 2 when it is axially moved.

  An ultraviolet lamp 4 and an infrared lamp 5 are connected to a polygonal lamp mount 11 in the lamp cylinder 4.

  The polygonal lamp mount 11 may be triangular, quadrangular, pentagonal, hexagonal, heptagonal, octagonal, etc. according to the inner diameter of the lamp tube 4, FIG. FIG. 3 clearly shows an octagonal lamp mount 11.

  The ultraviolet lamps 4 and the infrared lamps 5 connected to the polygonal lamp mount 11 are alternately connected in the vertical direction or the horizontal direction, and the ultraviolet rays and the infrared rays cross each other and irradiate the incineration ash 6 uniformly. To stabilize the incineration ash 6.

  The outer peripheral wall of the lamp tube is optimally made of hard heat-resistant glass or the like in order to transmit the rays of the ultraviolet lamp and the infrared lamp. For example, a metal tube can be attached in the middle of the glass tube to maintain the strength. A metal may be mounted in the vertical direction of the glass tube, and the lamp mount 11 may be axially moved to irradiate the incineration ash 6 uniformly.

  If the rotary cylinder 2 moves axially, the incineration ash 6 is also mixed with the rotation while the incineration ash 6 is attached to the inner wall of the rotary cylinder 2. The incineration ash 6 is uniformly UV and infrared rays. Is further irradiated to promote the hydroxy radical effect of the incinerated ash 6.

  The rotary cylinder 2 is axially moved stably and efficiently by the rotary roller 3.

  The incineration ash 6 poured into the incineration ash stabilization device 1 crosses the ultraviolet and infrared rays of the ultraviolet lamp 4 and the infrared lamp 5 in the lamp cylinder 4 in the hollow part of the rotary cylinder 2 and uniformly forms the incineration ash 6. The light rays irradiated from the ultraviolet lamp 4 and the infrared lamp 5 are also called light wave energy.

  In order to efficiently irradiate wave energy, the ultraviolet lamps 4 and the infrared lamps 5 are alternately provided at equal intervals.

  In addition, the rotary cylinder 2 efficiently irradiates wave energy, so that the rotation speed and forward / reverse rotation control of the electric motor 7 interlocked with the rotating roller 3 promotes the xy radical effect.

  The rotation speed varies depending on the content and amount of the incineration ash 6, but may be performed at a rotation speed of about 5 to 10 rpm, for example.

In order to irradiate the incineration ash 6 with wave energy to stabilize it in the hydroxy radical state, the minimum band gap energy (band gap energy is the energy that allows electrons in the valence band to jump out into the conduction band. Say).

The ultraviolet lamp 4 and the infrared lamp 5 provided on the inner peripheral wall of the rotary cylinder 2 are, for example, capable of an ultraviolet irradiation intensity of 21 μW / cm ^{2 with} a standard wavelength of 352 nm.

The infrared lamp 5 also has a role of thermally drying the incinerated ash in a wet state with a wavelength of 600 to 780 nm, for example.

The heavy metal insolubilization capacity per ultraviolet lamp is 200 g / day, and the heavy metal insolubilization capacity can be arbitrarily changed by installing the required number of lamps in the drum according to the amount of incinerated ash.

  The quantity of the ultraviolet lamp 4 and the infrared lamp 5 provided on the inner peripheral wall of the rotary cylinder 2 is, for example, generally 700 to 900 tons / day (the amount of garbage treated in each incineration facility (stoker furnace)). 200 to 300 tons / day × 3)), and the volume is 1/20 when combustibles are incinerated into ash.

  Therefore, the amount of incinerated ash discharged substantially is about 10 to 15 tons per unit. In order to efficiently irradiate the wave energy of this apparatus and promote heavy metal insolubilization, the number of ultraviolet lamps and infrared lamps It is sufficient that 5000 to 7500 are respectively provided in the rotary cylinder 2.

For example, if the size of the rotary cylinder 2 is 5 m in diameter and 10 m in length, the maximum number of installed ultraviolet lamps 3 and infrared lamps 4 is considered to be about 17,000, which is comparable to the amount of sunlight irradiated. The amount of light.

For example, efficient processing can be performed by installing small drums in parallel.

By adjusting the size of the entire device, the number of devices, and the amount of wave energy, such as ultraviolet lamps and infrared lamps, according to the amount of incineration ash discharged from the incineration plant, efficient processing such as shortening the irradiation time can be achieved.

The present invention is provided in an incineration treatment facility that disposes garbage discharged from our homes, and relates to the improvement of the influence on the ground environment that insolubilizes heavy metals and salts, which are a large amount of harmful substances contained in incineration ash.

The perspective view of the incineration ash stabilization device concerning the embodiment of the present invention is shown. The front view of the incineration ash stabilization device concerning the embodiment of the present invention is shown. The front view of the arrangement | positioning drawing of the octagonal lamp mount and irradiation lamp which concerns on embodiment of this invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Incineration ash stabilization apparatus 2 Rotary cylinder 3 Rotating roller 4 Lamp cylinder 5 Supply port 6 Incineration ash 7 Motor 8 Support shaft 9 Ultraviolet lamp 10 Infrared lamp 11 Lamp mount 12 Truck 13 Ash pit 14 Discharge port 15 Protrusion piece

Claims (4)

  The inclined rotary cylinder has a hollow cylindrical shape, and a lamp cylinder is mounted in the hollow portion. The rotary cylinder is pivoted to the left and right by driving a plurality of rotating rollers, and a plurality of ultraviolet rays are placed inside the lamp cylinder. An incineration ash stabilization device comprising a lamp and an infrared lamp, and capable of irradiating light uniformly to the incineration ash charged in the rotary cylinder. A plurality of ultraviolet lamps and infrared lamps are connected to a polygonal lamp mount in the hollow lamp cylinder of the rotary cylinder according to claim 1, and the outer peripheral wall of the lamp cylinder is a beam of ultraviolet lamps and infrared lamps. An incineration ash stabilization device characterized by having a transparent material structure that transmits light. The incineration ash stabilization device according to claim 1, wherein the lamp cylinder rotates in accordance with the rotation of the rotary cylinder. An incineration ash stabilization device, wherein a large number of protruding pieces are fixed to the inner wall of the rotary cylinder according to claim 1.