JPH04108127U - Sand circulation device for fluidized bed waste incinerator - Google Patents
Sand circulation device for fluidized bed waste incineratorInfo
- Publication number
- JPH04108127U JPH04108127U JP900291U JP900291U JPH04108127U JP H04108127 U JPH04108127 U JP H04108127U JP 900291 U JP900291 U JP 900291U JP 900291 U JP900291 U JP 900291U JP H04108127 U JPH04108127 U JP H04108127U
- Authority
- JP
- Japan
- Prior art keywords
- sand
- chute
- waste incinerator
- fluidized bed
- magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004576 sand Substances 0.000 title claims abstract description 177
- 239000002699 waste material Substances 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims description 22
- 238000000605 extraction Methods 0.000 claims description 13
- 239000002184 metal Substances 0.000 abstract description 24
- 229910052751 metal Inorganic materials 0.000 abstract description 24
- 238000007689 inspection Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
(57)【要約】
【目的】 流動床式ごみ焼却炉の砂循環装置の砂受入シ
ュ−ト、砂戻しシュ−トの閉塞あるいは炉本体の砂返送
口に設けられているロ−タリ−バルブの作動停止の発生
を防止する。
【構成】 砂循環装置１の砂受入シュ−ト２に複数の磁
石M2を、また、砂戻しシュ−ト４に複数の磁石M4を出し
入れ自在に内設し、振動ふるい64のスクリ−ンScを通過
した循環砂Ｓ中に混入している釘・針金片等の金属片を
吸引・捕捉することにより循環砂Ｓの中から除去するこ
とにより、これらが引っ掛かることに起因する砂受入シ
ュ−ト２、砂戻しシュ−ト４の閉塞あるいは砂返送口60
に設けられているロ−タリ−バルブＶの作動停止とを防
止することができる。
(57) [Summary] [Purpose] Blockage of the sand receiving chute and sand return chute of the sand circulation system of a fluidized bed waste incinerator, or the rotary valve installed at the sand return port of the incinerator body. prevent the occurrence of operational stoppage. [Structure] A plurality of magnets M 2 are installed in the sand receiving chute 2 of the sand circulation device 1, and a plurality of magnets M 4 are installed in the sand return chute 4 so as to be freely put in and taken out. By suctioning and capturing metal pieces such as nails and wire pieces mixed in the circulating sand S that has passed through the sand Sc, the metal pieces such as nails and wire pieces are removed from the circulating sand S. Blockage of sand return chute 2, sand return chute 4 or sand return port 60
It is possible to prevent the rotary valve V provided in the rotary valve V from stopping.
Description
【０００１】0001
本考案は流動床式ごみ焼却炉の砂循環装置の改善に関し、特に砂循環装置内を 循環する流動床式ごみ焼却炉に使用される循環砂に混入している鉄分を除去する ことにより砂循環装置の閉塞を防止し得るようにした流動床式ごみ焼却炉の砂循 環装置に関するものである。 This invention relates to improving the sand circulation system of a fluidized bed type waste incinerator, especially the inside of the sand circulation system. Removes iron mixed in circulating sand used in circulating fluidized bed waste incinerators The sand circulation system of the fluidized bed waste incinerator is designed to prevent clogging of the sand circulation system. This relates to a ring device.
【０００２】0002
周知のように、近年では、都市ごみや汚泥あるいは産業廃棄物等の被燃焼物を 処理するのに、燃焼効率が優れた流動床式ごみ焼却炉が良く用いられるようにな ってきている。 As is well known, in recent years, the use of combustible materials such as municipal waste, sludge, and industrial waste has been increasing. Fluidized bed incinerators, which have excellent combustion efficiency, are now often used for waste disposal. It's coming.
【０００３】 このような流動床式ごみ焼却炉（以下、ごみ焼却炉という）は、その模式的構 成説明図の図５に示すように、炉本体51の下部に押込送風機54から１次空気が供 給される風箱55を備え、この風箱55の上に散気ノズルを有しかつ流動床としての 砂層部52を支持する分散板53を備えている。0003 The schematic structure of such a fluidized bed waste incinerator (hereinafter referred to as a waste incinerator) is As shown in FIG. 5, a forced air blower 54 supplies primary air to the lower part of the furnace body 51. It is equipped with a wind box 55 that is supplied with air, and has an aeration nozzle on top of this wind box 55 and is used as a fluidized bed. A dispersion plate 53 that supports the sand layer portion 52 is provided.
【０００４】 さらに、砂層部52の上方に燃焼室57を備え、燃焼室57に２次空気送風機（図示 省略）から供給された２次空気を吹込む２次空気吹込ノズル58を備え、上部に排 ガス出口59を備えている他、上下方向の中程の一方にはごみ投入口56を、また他 方にはロ−タリ−バルブＶが介装されてなる砂返送口60を備えている。0004 Furthermore, a combustion chamber 57 is provided above the sand layer section 52, and a secondary air blower (not shown) is provided in the combustion chamber 57. It is equipped with a secondary air blowing nozzle 58 that blows in secondary air supplied from the In addition to being equipped with a gas outlet 59, there is a garbage inlet 56 on one side in the middle of the vertical direction, and a garbage inlet 56 on the other side. One side is provided with a sand return port 60 in which a rotary valve V is interposed.
【０００５】 上記砂層部52の砂は、風箱55から分散板53に設けられた散気ノズルを通して吹 込まれる１次空気により流動して、ごみ投入口56から投入されたごみを分解・ガ ス化させる働きをするものである。[0005] The sand in the sand layer section 52 is blown from the wind box 55 through the aeration nozzle provided on the dispersion plate 53. The primary air flowing causes the garbage thrown in from the garbage input port 56 to be decomposed and gashed. This function works to make it more effective.
【０００６】 ところで、焼却処理されるごみの中には、例えば釘・針金等の他多くの不燃物 が混入しており、これら不燃物は後述する不燃物抜出管等を備えると共に砂と不 燃物とを選別する機能を備えた不燃物抜出・分離装置に砂と共に排出される。[0006] By the way, among the garbage that is incinerated, there are many other non-combustible materials such as nails and wire. These incombustibles are mixed with sand and incombustibles, and a noncombustibles extraction pipe, etc., which will be described later, is installed and sand and incombustibles are mixed in. It is discharged together with sand to a non-combustible material removal and separation device that has the function of separating it from combustible materials.
【０００７】 不燃物抜出・分離装置は、分散板53の中央部に設けられた不燃物抜出口61に接 続され、風箱55を貫通して下方に延設される不燃物抜出管62と、この不燃物抜出 管61の下部に接続され、スクリュコンベアＣが内設され、かつ冷却機能を有して なる不燃物抜出装置63と、この不燃物抜出装置63の不燃物出口側に接続され、抜 出された不燃物と砂とを分離する振動ふるい64とからなっている。[0007] The incombustible material extraction/separation device connects to the incombustible material extraction port 61 provided in the center of the dispersion plate 53. A non-combustible material extraction pipe 62 is connected to the wind box 55 and extends downward through the wind box 55. It is connected to the lower part of the pipe 61, has a screw conveyor C installed therein, and has a cooling function. A non-combustible material extraction device 63 is connected to the non-combustible material outlet side of this non-combustible material extraction device 63, and It consists of a vibrating sieve 64 that separates sand from non-combustible materials.
【０００８】 上記振動ふるい64には、不燃物のうち釘・針金等を引っ掛かり難いよう、通常 ふるい目の開目が流れ方向に対して直交するル−バ型のスクリ−ンScが内設され ており、ふるい目の間隔は３ｍｍ程度になっている。[0008] The above-mentioned vibrating sieve 64 is usually equipped with a sieve to prevent non-combustible materials such as nails and wire from getting caught. A louver-shaped screen Sc with sieve openings perpendicular to the flow direction is installed inside. The distance between the sieve meshes is approximately 3 mm.
【０００９】 従って、不燃物抜出口61から不燃物抜出管62を通って落下した砂と不燃物とは 不燃物抜出装置63により振動ふるい64に送供され、ここにおいて砂と不燃物とに 分離されてそれぞれ排出されるが、そのうち砂は再利用に供するために後述する 構成になる砂循環装置１に送供される。[0009] Therefore, the sand and noncombustibles that fell from the noncombustibles extraction port 61 through the noncombustibles extraction pipe 62 are It is sent to a vibrating sieve 64 by a non-combustible material extraction device 63, where it is separated into sand and non-combustible materials. The sand will be separated and discharged, but the sand will be reused as will be discussed later. The sand is sent to the sand circulation system 1, which is constructed as follows.
【００１０】 上記砂循環装置１は振動ふるい64の砂出口に接続される砂受入シュ−ト２と、 これが連通し、無端状のチェ−ンに連続的に固着された複数のバケットが内蔵さ れてなる砂循環コンベア３と、この砂循環コンベア３の上部から炉本体51の前記 砂返送口60に連通する砂戻しシュ−ト４とからなっている。0010 The sand circulation device 1 includes a sand receiving chute 2 connected to the sand outlet of the vibrating sieve 64; This communicates and contains multiple buckets that are continuously fixed to an endless chain. The sand circulation conveyor 3 is made of It consists of a sand return chute 4 communicating with a sand return port 60.
【００１１】 従って、振動ふるい64のスクリ−ンScを通り抜けて砂出口から排出された砂Ｓ が砂循環装置１の砂受入シュ−ト２に送供されると、砂循環コンベア３により運 び揚げられ、砂戻しシュ−ト４から砂返送口60に送供される。そして、炉本体１ とシ−ルするためロ−タリ−バルブＶをとおして循環砂が炉本体51の砂層部52に 再供給される。[0011] Therefore, the sand S passed through the screen Sc of the vibrating sieve 64 and was discharged from the sand outlet. When the sand is delivered to the sand receiving chute 2 of the sand circulation system 1, it is transported by the sand circulation conveyor 3. The sand is lifted up and sent from the sand return chute 4 to the sand return port 60. And the furnace body 1 The circulating sand enters the sand layer 52 of the furnace body 51 through the rotary valve V to seal the Resupplied.
【００１２】 一方、砂戻しシュ−ト４には切替ダンパ５を介して分岐シュ−ト６が分岐して おり、砂層部52の砂の量が十分である場合には切替ダンパ５が切替えられ、循環 砂は分岐シュ−ト６から砂貯留槽７に貯留されるが、貯留された砂は必要に応じ て系外に排出されたり再び砂循環コンベア３により運び上げられ炉本体51内の砂 層部52に供給されたりする。0012 On the other hand, a branch chute 6 is branched from the sand return chute 4 via a switching damper 5. When the amount of sand in the sand layer section 52 is sufficient, the switching damper 5 is switched and the circulation is started. Sand is stored in the sand storage tank 7 from the branch chute 6, and the stored sand can be used as needed. The sand inside the furnace body 51 is discharged out of the system or carried up again by the sand circulation conveyor 3. It is supplied to the layer section 52.
【００１３】[0013]
ところで、小寸法の釘や針金片等の金属片の一部は砂と共にスクリ−ンのふる い目を通り抜けるため、これらが共に砂循環装置に送給されることになる。 金属片が混入している砂が砂循環装置に送給されると、これらが砂入口シュ− ト、砂戻しシュ−トあるいは炉本体の砂返送口に介装されてなるロ−タリ−バル ブに引っ掛かり、各シュ−トの閉塞やロ−タリ−バルブの作動停止というような 不具合が発生している。 By the way, some small metal pieces such as nails and pieces of wire can be washed away along with sand. Since the sand passes through the sand, they are both fed to the sand circulation system. When sand containing metal particles is fed into the sand circulation system, these particles pass through the sand inlet shoe. A rotary valve installed in the sand return chute or sand return port of the furnace body. If the valve gets caught in the valve, each chute may be blocked or the rotary valve may stop operating. A problem has occurred.
【００１４】 ごみ質によって相違するが、例えばこのような不具合は１回／月以上の頻度で 発生したりすることがあり、ごみ焼却炉の安定的な運転の維持が困難になるのに 加えて、その都度金属片の除去作業を行わなければならず、ごみ焼却設備の連続 安定運転を阻むと共に、その停止点検によるランニングコストの上昇の一要因に なっていた。[0014] It depends on the quality of the waste, but for example, such problems occur more than once a month. This makes it difficult to maintain stable operation of the waste incinerator. In addition, metal pieces must be removed each time, and waste incineration equipment must be continuously operated. This not only hinders stable operation, but also causes increased running costs due to stop inspections. It had become.
【００１５】 従って、本考案は金属片による砂循環系の閉塞の発生を防止し得るごみ焼却炉 の砂循環装置の提供を目的とする。[0015] Therefore, the present invention is a waste incinerator that can prevent the occurrence of clogging of the sand circulation system by metal pieces. The purpose is to provide a sand circulation system.
【００１６】[0016]
本考案は、循環砂中の釘や針金片等の金属片を除去し得れば上記不具合を防止 し得ることを知見してなしたものであって、従って本考案の請求項１に係るごみ 焼却炉の砂循環装置の特徴とするところは、ごみ焼却炉に設けられた砂返送口に 連通する砂戻しシュ−トを上部に備え、該ごみ焼却炉の下部に設けられた不燃物 排出管と、該不燃物排出管の排出口側に接続される不燃物抜出し装置と、該不燃 物抜出し装置に接続された振動ふるいとを介して排出された循環砂を受入れる砂 受入シュ−トを下部に備えると共に、該砂受入シュ−トと前記砂戻しシュ−トと の間に受け入れた砂を運ぶ砂循環コンベアを備えてなるごみ焼却炉の砂循環装置 において、前記砂受入シュ−トに磁石を装脱自在に内設してなる構成にしたとこ ろにある。 This invention prevents the above problems by removing metal pieces such as nails and wire pieces from the circulating sand. This was done with the knowledge that it could be done, and therefore, the garbage according to claim 1 of the present invention The feature of the incinerator's sand circulation system is that the sand return port installed in the waste incinerator The incombustible waste incinerator is equipped with a communicating sand return chute in the upper part and installed in the lower part of the waste incinerator. a discharge pipe, a noncombustible material removal device connected to the discharge port side of the noncombustible material discharge pipe, and Sand receiving circulating sand discharged through a vibrating sieve connected to a material extraction device A receiving chute is provided at the lower part, and the sand receiving chute and the sand returning chute are connected to each other. A sand circulation system for a waste incinerator equipped with a sand circulation conveyor that transports sand received during In the sand receiving chute, a magnet is removably installed inside the sand receiving chute. It's in the ro.
【００１７】 また、本考案の請求項２に係るごみ焼却炉の砂循環装置の特徴とするところは 、請求項１記載のごみ焼却炉の砂循環装置において、砂循環装置の砂戻しシュ− トに磁石を装脱自在に内設してなる構成にしたところにある。[0017] In addition, the characteristics of the sand circulation device for a waste incinerator according to claim 2 of the present invention are , In the sand circulation system for a waste incinerator according to claim 1, a sand return shoe of the sand circulation system is provided. It has a structure in which a magnet is removably installed inside the base.
【００１８】[0018]
本考案の請求項１に係るごみ焼却炉の砂循環装置によれば、磁石が砂受入シュ −トに装脱自在に内設されているので、砂受入シュ−トに送給された循環砂の中 に混入している磁性を有する金属片は磁石によって吸引される。 According to the sand circulation device for a waste incinerator according to claim 1 of the present invention, the magnet is attached to the sand receiving system. - Since it is removably installed inside the chute, the circulating sand fed to the sand receiving chute is The magnetic metal pieces mixed in are attracted by the magnet.
【００１９】 さらに、本考案の請求項２に係るごみ焼却炉の砂循環装置によれば、磁石が砂 受入シュ−トと砂戻しシュ−トとに装脱自在に内設されているので、砂受入シュ −トに送給された循環砂の中に混入している磁性を有する金属片は磁石によって 吸引されると共に、未吸引の磁性を有する金属片は砂戻しシュ−トに内設された 磁石によって吸引される。[0019] Furthermore, according to the sand circulation device for a waste incinerator according to claim 2 of the present invention, the magnet The sand receiving chute and the sand return chute are removably installed inside the sand receiving chute. - Magnetic metal pieces mixed in the circulating sand fed to the While being attracted, the unattracted magnetic metal pieces are placed inside the sand return chute. Attracted by a magnet.
【００２０】[0020]
以下に、本考案に係る一実施例を、ごみ焼却炉と砂循環装置の模式的構成説明 図の図１と、図１のＡ部拡大側面断面図の図２と、図２のＢ−Ｂ線断面図の図３ と、図１のＣ部拡大側面断面図の図４とを参照しながら、従来と同一のもの並び に同一機能を有するものを同一符号を以て、その構成上相違する点についてだけ 説明する。 Below, one embodiment of the present invention will be explained with a schematic configuration explanation of a garbage incinerator and a sand circulation device. Figure 1 of the diagram, Figure 2 of the enlarged side sectional view of section A in Figure 1, and Figure 3 of the BB line sectional view of Figure 2. 4, which is an enlarged side cross-sectional view of section C in FIG. Components that have the same functions are designated by the same reference numerals, and only the differences in structure are indicated. explain.
【００２１】 図１において、符号60はロ−タリ−バルブＶが介装され、炉本体51に砂を戻す 砂返送口であり、また符号64は振動ふるいであって何れも従来と同構成である。 炉本体51の側方には、下部に後述する砂受入シュ−ト２を有し上部に砂戻しシ ュ−ト４を有する砂循環コンベア３とからなる砂循環装置１が立設されている。[0021] In FIG. 1, a rotary valve V is installed at 60 to return sand to the furnace body 51. It is a sand return port, and numeral 64 is a vibrating sieve, both of which have the same structure as the conventional one. On the side of the furnace body 51, there is a sand receiving chute 2 at the bottom, which will be described later, and a sand return system at the top. A sand circulation device 1 consisting of a sand circulation conveyor 3 having a chute 4 is installed upright.
【００２２】 そして、上記砂受入シュ−ト２は振動ふるい64の砂出口に、砂戻しシュ−ト４ は砂返送口60にそれぞれ接続されており、さらにこの砂戻しシュ−ト４は切替ダ ンパ５、分岐シュ−ト６を介して砂貯留槽７に連通している。[0022] The sand receiving chute 2 is connected to the sand outlet of the vibrating sieve 64, and the sand returning chute 4 is connected to the sand outlet of the vibrating sieve 64. are connected to sand return ports 60, and this sand return chute 4 is connected to a switching da It communicates with a sand storage tank 7 via a pump 5 and a branch chute 6.
【００２３】 上記砂受入シュ−ト２は、図２に示すように、傾斜した砂受入シュ−ト２の上 側に水平部と垂直部とを有する凸所が設けられている。水平部には磁石出入口21 をが設けられており、これには取付ボルト27により水平部に着脱自在に固着され る平板状の取付板22に垂設されてなる磁石M2を支持する支持棒23が取付長さ調整 自在に挿入されている。As shown in FIG. 2, the sand receiving chute 2 is provided with a convex portion having a horizontal portion and a vertical portion on the upper side of the inclined sand receiving chute 2. A magnet inlet/outlet 21 is provided in the horizontal part, and this has a support rod that supports the magnet M2 , which is vertically installed on a flat mounting plate 22 that is removably fixed to the horizontal part with a mounting bolt 27. 23 is inserted so that the installation length can be adjusted freely.
【００２４】 より詳しくは、支持棒23の一端側には雄螺子が螺刻されており、この部位が取 付板22の中央に穿設された貫通孔に通されると共に取付板22を挟むように螺着さ れた固定ナット26により固着されると共に、その他端側は砂受入シュ−ト２の下 部内面の傾斜に沿うように折曲げられた折曲部24を有しており、その先端は砂の 供給口に向けられている。[0024] More specifically, a male screw is carved into one end of the support rod 23, and this part is removed. It is passed through a through hole drilled in the center of the attachment plate 22 and screwed onto the attachment plate 22 so as to sandwich it therebetween. At the same time, the other end is fixed by a fixing nut 26 that is It has a bent part 24 that is bent along the slope of the inner surface of the part, and its tip is covered with sand. Directed to the supply port.
【００２５】 さらに、この支持棒23の長手方向の中間よりも下方の折曲部24側寄りには、磁 石支持ナット25が螺着されており、これにより、支持棒23に外嵌された複数の円 板状の磁石M2が重畳状に支持されている。なお、この場合には、図３に示すよう に、複数の円板状の磁石M2は、２セット配設されている。Further, a magnet support nut 25 is screwed onto the bending portion 24 side below the middle of the support rod 23 in the longitudinal direction. disc-shaped magnets M2 are supported in a superimposed manner. In this case, as shown in FIG. 3, two sets of the plurality of disc-shaped magnets M2 are arranged.
【００２６】 一方、垂直部には砂受入シュ−ト２の内部状況を点検するための開閉自在な点 検用の点検口28が設けられており、磁石M2により吸引されて捕捉された金属片の 量が定期的に点検され、捕捉量が多くなると前記取付けボルト27を外すことによ り磁石出入口21から磁石M2が取出され、捕捉金属の除去が行われる。勿論、場合 によっては磁石M2を取出さず、点検口28から除去し得る場合もある。On the other hand, an inspection opening 28 that can be opened and closed for inspecting the internal condition of the sand receiving chute 2 is provided in the vertical part, and the metal pieces attracted and captured by the magnet M 2 are removed. The amount of trapped metal is periodically checked, and when the amount of trapped metal increases, the magnet M2 is taken out from the magnet entrance/exit port 21 by removing the mounting bolt 27, and the trapped metal is removed. Of course, in some cases, the magnet M 2 may be removed from the inspection port 28 without being taken out.
【００２７】 次に、砂戻しシュ−ト４は図４に示すように、傾斜した砂受入シュ−ト４の上 側に、水平部と垂直部とを有する凸所が設けられ、水平部には磁石出入口41が設 けられており、これから平板状の取付板42により支持され、下端に折曲部44を有 し、かつ長手方向の中間よりも下方の折曲部44側寄りに複数の円板状の磁石M4を 重畳状に支持してなる支持棒43が挿入される他、垂直部に点検口48を備えてなる 構成であって、上記砂受入シュ−ト２と同等の構成になっている。Next, as shown in FIG. 4, the sand return chute 4 is provided with a convex part having a horizontal part and a vertical part on the upper side of the inclined sand receiving chute 4, and the horizontal part has a convex part. A magnet inlet/outlet 41 is provided, which is supported by a flat mounting plate 42, has a bent portion 44 at the lower end, and has a plurality of discs located lower than the middle in the longitudinal direction and closer to the bent portion 44. In addition to inserting a support rod 43 which supports shaped magnets M4 in an overlapping manner, it also has an inspection hole 48 in the vertical part, and has the same structure as the sand receiving chute 2 described above. ing.
【００２８】 以下、上記した構成になるごみ焼却炉の砂循環装置の作用態様を説明すると、 振動ふるい64によってふるい分けられスクリ−ンScを通過した小寸法の金属片を 含む循環砂Ｓが砂受入シュ−ト２に供給されると、これらは砂受入シュ−ト２の 斜面に沿って滑落するが、滑落中において取付棒23の折曲部24の先端で引っ掛け られた金属片が磁石M2に吸引されて捕捉されるので、循環砂Ｓ中から金属片が除 去される。[0028] Hereinafter, the mode of operation of the sand circulation system of the garbage incinerator having the above-mentioned configuration will be explained. The circulating sand S containing small-sized metal pieces that has been sieved by the vibrating sieve 64 and passed through the screen Sc is received as sand. When the sand is supplied to the chute 2, it slides down along the slope of the sand receiving chute 2, but during the sliding, the metal piece caught at the tip of the bent part 24 of the mounting rod 23 is attached to the magnet M2. Since the metal pieces are attracted and captured by the circulating sand S, the metal pieces are removed from the circulating sand S.
【００２９】 さらに、砂受入シュ−ト２において磁石M2により捕捉されなかった金属片は循 環砂Ｓと共に砂循環コンベアにより運び上げられると共に砂戻しシュ−ト４に供 給されるが、ここでも砂受入シュ−ト２と同様に磁石M4が配設されているので、 磁石M2により捕捉されなかった金属片は磁石M4によって捕捉される。Further, the metal pieces that are not captured by the magnet M 2 in the sand receiving chute 2 are carried up by the sand circulating conveyor together with the circulating sand S and are supplied to the sand returning chute 4, but here too, the sand Since the magnet M4 is provided in the same manner as the receiving chute 2, metal pieces that are not captured by the magnet M2 are captured by the magnet M4 .
【００３０】 このように、２段構えで金属片が循環砂Ｓの中から除去されるので、従来問題 になっていた砂入口シュ−ト、砂戻しシュ−トあるいは炉本体の砂返送口に介装 されてなるロ−タリ−バルブに金属片が引っ掛かり、各シュ−トの閉塞やロ−タ リ−バルブの作動停止というような砂循環系の閉塞不具合の発生頻度が大幅に少 なくなった。[0030] In this way, the metal pieces are removed from the circulating sand S in two stages, which solves the conventional problem. Install the sand inlet chute, sand return chute, or sand return port of the furnace body. A piece of metal can get caught in the rotary valve, which can block each chute or cause rotor damage. Significantly reduces the frequency of blockage problems in the sand circulation system, such as leak valves stopping operation. lost.
【００３１】 なお、以上では砂受入シュ−ト２と砂戻しシュ−ト４とにそれぞれ複数の磁石 M2と複数の磁石M4とを内設した例を説明したが、砂受入シュ−ト２にのみ複数の 磁石M2が配設されてなる構成であっても、循環砂Ｓの中に混入している金属片が 捕捉されるのでそれなりに有効であって、従来に比較して確実に砂循環系の閉塞 不具合の発生頻度を少なくすることができる。[0031] In the above, an example has been described in which the sand receiving chute 2 and the sand returning chute 4 are each provided with a plurality of magnets M2 and a plurality of magnets M4 , but the sand receiving chute Even with a configuration in which a plurality of magnets M2 are arranged only in the circulating sand S, it is still effective as it captures the metal pieces mixed in the circulating sand S, and is more reliable than the conventional method. It is possible to reduce the frequency of clogging problems in the sand circulation system.
【００３２】[0032]
以上詳述したように、請求項１に係るごみ焼却炉の砂循環装置によれば、磁石 が砂受入シュ−トに装脱自在に内設されており、また請求項２に係るごみ焼却炉 の砂循環装置によれば、磁石が砂受入シュ−トと砂戻しシュ−トとに装脱自在に 内設されているので、振動ふるいのスクリ−ンを通過して砂受入シュ−トに送給 された循環砂の中に混入している磁性を有する金属片は磁石によって吸引されて 砂中から除去される。 As detailed above, according to the sand circulation device for a garbage incinerator according to claim 1, the magnet is removably installed inside the sand receiving chute, and the waste incinerator according to claim 2 According to the sand circulation device of Since it is installed internally, the sand passes through the vibrating sieve screen and is fed to the sand receiving chute. The magnetic metal pieces mixed in the recycled sand are attracted by the magnet. removed from the sand.
【００３３】 従って、従来のごみ焼却炉の砂循環装置のように砂入口シュ−ト、砂戻しシュ −トあるいは炉本体の砂返送口に介装されてなるロ−タリ−バルブに引っ掛かる 小寸法の釘・針金片等の金属片が少なくなる結果、各シュ−トの閉塞やロ−タリ −バルブの作動停止というような不具合の発生頻度が大幅に低下するので、ごみ 焼却炉の安定的な連続運転の維持と、停止点検によるランニングコストの上昇の 防止とが可能になり、この考案の効果は極めて大なるものである。[0033] Therefore, unlike the sand circulation system of a conventional waste incinerator, there is a sand inlet chute and a sand return chute. - It gets caught in the rotary valve installed in the sand return port of the furnace body. As a result of fewer metal pieces such as small nails and wire pieces, blockage of each chute and rotary - The frequency of malfunctions such as valve stoppages is significantly reduced, so waste Maintaining stable continuous operation of the incinerator and reducing running costs due to stop inspections The effect of this invention is extremely large.
【図１】本考案の実施例に係るごみ焼却炉と砂循環装置
の模式的構成説明図である。FIG. 1 is a schematic structural explanatory diagram of a garbage incinerator and a sand circulation device according to an embodiment of the present invention.
【図２】図１のＡ部拡大側面断面図である。FIG. 2 is an enlarged side sectional view of section A in FIG. 1;
【図３】図２のＢ−Ｂ線断面図である。FIG. 3 is a sectional view taken along line BB in FIG. 2;
【図４】図１のＣ部拡大側面断面図である。FIG. 4 is an enlarged side sectional view of section C in FIG. 1;
【図５】従来例に係るごみ焼却炉と砂循環装置の模式的
構成説明図である。FIG. 5 is a schematic structural explanatory diagram of a conventional garbage incinerator and a sand circulation device.
１…砂循環装置、２…砂受入シュ−ト、３…砂循環コン
ベア、４…砂戻しシュ−ト、５…切替ダンパ、６…分岐
シュ−ト、７…砂貯留槽、21…磁石出入口、22…取付
板、23…取付棒、24…取付棒の折曲部、25…磁石支持ナ
ット、26…固定ナット、27…取付ボルト、28…点検口、
41…磁石出入口、42…取付板、43…取付棒、44…取付棒
の折曲部、45…磁石支持ナット、46…固定ナット、47…
取付ボルト、48…点検口、51…炉本体、52…砂層部、53
…分散板、54…押込送風機、55…風箱、56…ごみ投入
口、57…燃焼室、58…２次空気吹込ノズル、59…排ガス
出口、60…砂返送口、61…不燃物出口、62…不燃物抜出
管、63…不燃物抜出装置、64…振動ふるい、Ｃ…スクリ
ュコンベア、M2，M4…磁石、Ｓ…循環砂、Sc…スクリ−
ン、Ｖ…ロ−タリ−バルブ。1...Sand circulation device, 2...Sand receiving chute, 3...Sand circulation conveyor, 4...Sand return chute, 5...Switching damper, 6...Branch chute, 7...Sand storage tank, 21...Magnet entrance/exit , 22... Mounting plate, 23... Mounting rod, 24... Bent part of mounting rod, 25... Magnet support nut, 26... Fixing nut, 27... Mounting bolt, 28... Inspection port,
41...Magnet entrance/exit, 42...Mounting plate, 43...Mounting rod, 44...Bent part of mounting rod, 45...Magnet support nut, 46...Fixing nut, 47...
Mounting bolt, 48...Inspection port, 51...Furnace body, 52...Sand layer, 53
...dispersion plate, 54...forced blower, 55...wind box, 56...garbage inlet, 57...combustion chamber, 58...secondary air blowing nozzle, 59...exhaust gas outlet, 60...sand return port, 61...incombustible material outlet, 62...Incombustibles extraction pipe, 63...Incombustibles extraction device, 64...Vibration sieve, C...Screw conveyor, M2 , M4 ...Magnet, S...Circulating sand, Sc...Screen
V...Rotary valve.
Claims (2)
口に連通する砂戻しシュ−トを上部に備え、該流動床式
ごみ焼却炉の下部に設けられた不燃物排出管と、該不燃
物排出管の排出口側に接続される不燃物抜出し装置と、
該不燃物抜出し装置に接続された振動ふるいとを介して
排出された循環砂を受入れる砂受入シュ−トを下部に備
えると共に、該砂受入シュ−トと前記砂戻しシュ−トと
の間に受け入れた砂を運ぶ砂循環コンベアを備えてなる
流動床式ごみ焼却炉の砂循環装置において、前記砂受入
シュ−トに磁石を装脱自在に内設してなることを特徴と
する流動床式ごみ焼却炉の砂循環装置。1. A non-combustible material discharge pipe provided at the lower part of the fluidized bed waste incinerator, the upper part of which is provided with a sand return chute that communicates with a sand return port provided in the fluidized bed waste incinerator; a noncombustible material removal device connected to the discharge port side of the noncombustible material discharge pipe;
A sand receiving chute is provided at the lower part for receiving the circulating sand discharged through the vibrating sieve connected to the incombustible material extraction device, and a sand receiving chute is provided between the sand receiving chute and the sand return chute. A sand circulation system for a fluidized bed waste incinerator comprising a sand circulation conveyor for transporting received sand, characterized in that a magnet is removably installed in the sand receiving chute. Sand circulation device of garbage incinerator.
脱自在に内設してなる実用新案登録請求項１記載の流動
床式ごみ焼却炉の砂循環装置。2. The sand circulation system for a fluidized bed type waste incinerator according to claim 1, which is a registered utility model and comprises a magnet removably installed in the sand return chute of the sand circulation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991009002U JP2538015Y2 (en) | 1991-02-26 | 1991-02-26 | Sand circulator for fluidized bed incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991009002U JP2538015Y2 (en) | 1991-02-26 | 1991-02-26 | Sand circulator for fluidized bed incinerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04108127U true JPH04108127U (en) | 1992-09-18 |
| JP2538015Y2 JP2538015Y2 (en) | 1997-06-04 |
Family
ID=31899736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991009002U Expired - Fee Related JP2538015Y2 (en) | 1991-02-26 | 1991-02-26 | Sand circulator for fluidized bed incinerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2538015Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51124070A (en) * | 1975-04-23 | 1976-10-29 | Takuma Co Ltd | Dust incinaration furnace, floating combustion type |
| JPS5971915A (en) * | 1982-10-19 | 1984-04-23 | Ishikawajima Harima Heavy Ind Co Ltd | Fluidized medium circulating device of fluidized bed incinerator |
| JPH02108742U (en) * | 1988-11-07 | 1990-08-29 |
-
1991
- 1991-02-26 JP JP1991009002U patent/JP2538015Y2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51124070A (en) * | 1975-04-23 | 1976-10-29 | Takuma Co Ltd | Dust incinaration furnace, floating combustion type |
| JPS5971915A (en) * | 1982-10-19 | 1984-04-23 | Ishikawajima Harima Heavy Ind Co Ltd | Fluidized medium circulating device of fluidized bed incinerator |
| JPH02108742U (en) * | 1988-11-07 | 1990-08-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2538015Y2 (en) | 1997-06-04 |
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