JP2722969B2 - Fluidized bed reactor gas distributor plate - Google Patents

Fluidized bed reactor gas distributor plate

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JP2722969B2
JP2722969B2 JP4287374A JP28737492A JP2722969B2 JP 2722969 B2 JP2722969 B2 JP 2722969B2 JP 4287374 A JP4287374 A JP 4287374A JP 28737492 A JP28737492 A JP 28737492A JP 2722969 B2 JP2722969 B2 JP 2722969B2
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gas distribution
distribution plate
cap
plate
gas
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JPH06136013A (en
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雅志 半場
耕造 宮崎
秀雄 日下部
勝幸 高木
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住友化学工業株式会社
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
    • B01J8/44Fluidisation grids
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00Processes of polymerisation
    • C08F2/34Polymerisation in gaseous state

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、エチレン、プロピレン等のオレフィン類の気相重合に適した流動層型反応器のガス分散板に関するものである。 The present invention relates are those of ethylene, relates fluidized bed reactor gas distributor plate suitable for gas phase polymerization of olefins such as propylene. また、本発明のガス分散板は撹拌機付流動層型反応器に使用することもできるものである。 The gas distribution plate of the present invention are those which can also be used a stirrer with a fluidized bed reactor.

【0002】なお、本明細書中で記載する「重合」及び「重合体」とは、それぞれ「単独重合」並びに「共重合」及び「単独重合体」並びに「共重合体」を含む意味で用いる。 [0002] Incidentally, described herein as "polymerization" and "polymer" is used to mean, respectively including "homopolymerization" and "copolymerization", and "homopolymer" and "copolymer" .

【0003】 [0003]

【従来の技術及び発明が解決しようとする課題】近年、 BACKGROUND OF INVENTION Problems to be Solved In recent years,
オレフィン重合用の遷移金属触媒の改良により単位遷移金属あたりのオレフィン重合体の生産能力が飛躍的に向上し、その結果重合後における触媒除去操作が省略されるようになった。 Production capacity of an olefin polymer per unit transition metal by improving the transition metal catalysts for the polymerization of olefins is dramatically improved, now the catalyst removal operation is omitted after the results polymerization. こうした高活性触媒を用いる時には、 When using such highly active catalyst,
重合後の操作が最も簡単なことから、一般にはオレフィンの重合を気相状態で行う方法が採用されている。 Since the operation after the polymerization is the simplest, generally it is employed a method of performing the polymerization of olefins in the gas phase. かかる気相重合においては通常、重合を円滑に進めるために流動層型反応器が多用され、導入管を経て反応器下部より導入したオレフィン若しくはオレフィン含有ガスをガス分散板で均一に分散させて上昇させ、流動層内でオレフィン重合体と固体粒子からなる触媒粒子を流動しつつ重合を行っている。 Normally in such gas-phase polymerization, a fluidized bed reactor is often used to promote the polymerization smoothly, increase the olefin or olefin-containing gas introduced from the reactor bottom through the inlet pipe was uniformly dispersed in the gas distributor plate It is, is carried out while being polymerized flow of catalyst particles comprising an olefin polymer and the solid particles in the fluidized bed.

【0004】この種の流動層型反応器では、従来よりガス分散板に多孔板が広く利用されているが、孔に重合体粒子が付着して閉塞を起こすことがあり、この場合重合装置の長期運転継続が不可能になる。 [0004] In this type of fluidized bed reactor, although the porous plate the gas distribution plate have conventionally been widely used, can cause blockage adhering polymer particles to the hole, in this case the polymerization system long-term continuous operation is impossible. ここで孔径の大きなものを用いると、上記閉塞の問題はある程度解消されるが、重合体粒子が孔を通って落下しガス分散板下で壁に付着したり、又孔と孔の間の距離、即ちピッチが長くなり孔と孔の間の部分に流動の悪い部分が生じることがある。 Now used as large pore size, the obstruction problem but to some extent resolved, or adhere to the walls polymer particles fall through the holes under the gas distribution plate, the distance between the Mataana and hole , that is, that occurs part bad part of the flow between the pitch become longer hole and the hole. この場合、重合熱の除去が不十分となり、重合体の塊状化等のトラブルが発生し、運転停止に至る可能性が高い。 In this case, removal of polymerization heat becomes insufficient, troubles agglomeration or the like of the polymer occurs, is likely to result in shutdown. こうした問題の改善のために、ガス分散板の孔の上に各種キャップを取り付けたものが提案されている。 For these problems improvement has been proposed that mounting various caps on the holes of the gas distribution plate. 例えば、特開昭57-079543 号公報では屋根形キャップ、特開昭58-154702 号公報では三角錘形キャップ、特開昭58-196205 号公報では仕切壁を利用したキャップ、 For example, JP 57-079543 ​​Patent roof-shaped cap in Japanese, triangular pyramid-shaped cap in JP-A-58-154702, the cap using a partition wall in JP-A-58-196205,
特開昭58-201802 号公報ではバブルキャップ、特開昭61 Bubble cap in JP 58-201802, JP-Sho 61
-106608 号公報ではアングルキャップがそれぞれ提案されている。 In -106608 discloses angles cap have been proposed respectively.

【0005】一方、孔径の大小に係わらず、ガス分散板直上は、流動不良となりやすい。 On the other hand, regardless of the magnitude of pore size, gas distribution plate immediately above, it tends to flow failure. この場合も、重合体の塊状化等のトラブルが発生し、運転停止や製品品質悪化に至る可能性が高い。 Again, trouble agglomeration or the like of the polymer occurs, is likely to result in shutdown and product quality deterioration. この問題を解決する方法として、 As a method for solving this problem,
ガス分散板からのガスの吹き出しに指向性をもたせ、ガス分散板上に旋回するガスの流れを生成させる方法が考えられた(鞭巌 著『流動層の反応工学』85頁、昭和58年10月培風館発刊)。 Remembering directivity in the balloon of the gas from the gas distribution plate, a method of generating a flow of gas to pivot on the gas distribution plate is considered ( "Reaction Engineering fluidized layer" 85, pp Muchiiwao al, 1983 10 month Baifukan published). この他、特開平01-284509 In addition, JP-A-01-284509
号公報では、同心円上に水平一方向吹き出しのキャップを並べて、また特開平03-157405 号公報では、千鳥型配置に水平一方向吹き出しの孔を開けた板を一枚またはそれ以上組合せた一体構造を有するガス分散板を用いて、 No. In Japanese, side by side horizontal direction balloon cap on a concentric circle, and in JP-A 03-157405, JP-piece structure in which a plate spaced horizontal direction blowout holes in a staggered arrangement combining one or more using a gas dispersion plate having,
旋回流を生成させる提案がなされている。 Proposed to produce a swirling flow it has been made. しかしながら、これらのガス分散板は、重合体粒子の付着・塊発生等のトラブルを充分に防止することができず、良好な流動状態を保つには満足できるものではなかった。 However, these gas distribution plate, can not be sufficiently prevented troubles attachment and mass generation of polymer particles, it is not satisfactory to maintain good flow conditions.

【0006】また一般に、商業運転規模の大型反応器では、ガス分散板は数十トンの重合体粒子の重量を支えなければならず、ガス分散板下に支持構造物が必要となるが、これらのガス分散板では孔が不規則に配置されているため、単純な構造の、例えば格子状の支持構造物ではいずれかの孔がその構造物のため塞がれてしまう。 [0006] Generally, in large reactors commercial operation scale, gas distribution plate must support the weight of several tens of tons of the polymer particles, it is necessary to support structure under the gas distribution plate, these in the gas distribution plate since holes are irregularly arranged, a simple structure, for example, in the lattice support structure is one of the hole will be blocked because of its structure. したがって、おのずと複雑な構造、例えば同心円状の支持構造物を用いざるを得ないという不都合を有する。 Therefore, it has the disadvantage that forced to use a naturally complex structure, for example, concentric support structure.

【0007】 [0007]

【課題を解決するための手段】かかる事情に鑑み、本発明者らは、重合体粒子の付着・塊発生等のトラブルを防止し、良好な流動状態を保つためのガス分散板について鋭意検討した結果、孔を特定の配置とし、また該孔の上に配設するキャップの方向を特定の方向とすることによって課題を解決するガス分散板を見出し、さらに種々の検討を加えて本発明を完成させた。 In view of the Means for Solving the Problems] Such circumstances, the present inventors to prevent troubles attachment and mass generation of polymer particles were intensively studied gas distribution plate to maintain good flow conditions result, the pores with a particular arrangement, also found gas distribution plate to solve the problem by making the direction of the cap disposed on the pores with a particular direction, completing the present invention further adding various studies It was.

【0008】すなわち、本発明は、流動層型反応器のガス分散板において、多数の孔を正方形配列に配置し、ガスが分散板に沿って水平方向へ吹き出すようにした外形が流線型であるキャップを該孔の上に配設し、該方向が実質的に流動層の旋回方向であり、しかも孔(10、2 Namely, the present invention provides a gas distribution plate of the fluidized bed reactor, arranged a number of holes in a square array, contour the gas was blown out horizontally along the distribution plate is streamlined cap was disposed on the pores, the direction is the turning direction of the substantially fluidized bed, moreover holes (10, 2
0、30及び40)で形成される最小の正方形において、該方向は該キャップが配設された孔(10)の対角線上の孔(30)とその他の孔(20または40)のほぼ中間点(XまたはY)の向きにあると共に、反応器断面と同心円をなす円周の接線とのなす角度の小さい方を選択し、さらに、最外周の孔は反応器内壁近傍にあって、反応器断面と同心円を成す円周上にあり、その上に上記と同様のキャップをガスが当該円周の接線方向より外側に吹き出すように配設してなることを特徴とする流動層型反応器のガス分散板を提供するものである。 At the minimum of the square formed by the 0, 30 and 40), approximately the midpoint of the diagonal hole (30) and the other hole of the direction the cap is arranged holes (10) (20 or 40) together in the direction of the (X or Y), the select smaller angle between the circumferential tangent forming the reactor cross section and concentric, further, the outermost holes in the reactor inner wall near the reactor section and located on a circumference forming the concentric circles, the fluidized bed reactor similar to the above cap thereon gas characterized by being arranged to blow outside the tangential direction of the circumference there is provided a gas distribution plate.

【0009】以下、本発明を具体的に説明する。 [0009] Hereinafter, detailed explanation of the present invention. 本発明のガス分散板は、反応器内壁近傍部を除いて正方形配列に多数の孔が配置される。 Gas distribution plate of the present invention, a large number of holes are arranged in a square array with the exception of the reactor near the inner wall section. この場合の孔と孔の間の距離、つまりピッチは分散板の開口比、即ち反応器の全面積に対する孔の開口部の総面積またはキャップの開口部 The distance between the hole and the hole of the case, i.e. pitch opening ratio of the dispersion plate, i.e. the reactor of the opening of the total area or the cap of the opening of the hole to the total area
の総面積の小さい方の面積との割合、及び上記孔の開口 Ratio of the smaller area of the total area, and the opening of the hole
部の面積またはキャップの開口部の面積の小さい方の面 Surface of the smaller area of the opening portion of the area or cap parts
より決定される。 It is determined from the product. 開口比は層半径方向の均一流動化を保持するため分散板の所要圧力損失が全圧力損失の4割程度になるように設計されるのが好ましい。 Opening ratio is preferably designed so required pressure loss in the distribution plate to hold the uniform fluidization of the layer radial direction is about 40% of the total pressure loss. また、孔径は重合体粒子平均径の5倍未満ではガス分散板の閉塞が懸念されため、重合体粒子平均径の5倍以上に設計されるのが好ましい。 Further, the pore size for a concern that clogging of the gas distribution plate is less than five times of the polymer particles having an average diameter preferably is at least equal to 5 times the polymer particles have an average particle size. 一方、ピッチが長すぎると孔の間に流動不良部が形成されるので、できるだけ短かくすることが望ましい。 On the other hand, since the flow failure portion between the pitch is too long holes are formed, it is desirable that as much as possible short. したがって、開口比は、通常0.5〜10 Thus, the aperture ratio is usually 0.5 to 10
%とし、孔の直径は5〜30mm、孔のピッチは15〜 % And then, the diameter of the holes is 5 to 30 mm, the pitch of the holes 15
400mmの範囲である。 It is in the range of 400mm.

【0010】図1〜3は、それぞれ本発明で用いるキャップの一具体例を示す図面であり、そのaはキャップの平面図、bはその側面図及びcはその立面図を表わす。 [0010] Figure 1-3 is a view showing a specific example of a cap for use in the present invention, respectively, that a plan view of the cap, b is a side view and c represents the elevational view.
図1において、孔1の上に取り付けるキャップ2は、ガスの旋回流を阻害しないよう、又キャップ上流で滞留部を生成しないよう図1aまたはbに示すように外形が流線型のキャップであって、図1cに示すように開口部3 In Figure 1, the cap 2 attached to the top of the hole 1, so as not to inhibit the rotational flow of gas, also a cap outer shape of the streamlined as shown in FIG. 1a or b to not generating the residence portion in the cap upstream, opening 3 as shown in Figure 1c
の外形線が、例えば半円形を成し、ガスが水平一方向から吹き出す構造を有する。 The outline is, for example, forms a semi-circular and has a structure in which gas is blown from the horizontal direction. この場合、開口部の外形線が偏平な三角形または四角形でもよい。 In this case, the outline of the opening portion may be a flat triangular or quadrangular. 図2及び3に示すように、キャップは、いわゆるボートの前半分をひっくり返したような流線型をしていてもよい。 As shown in FIGS. 2 and 3, cap streamlined may was not as tipped front half of the so-called boat. 外形が流線型のキャップは、図1〜3に示したものに限定されるものではない。 Outer shape streamlined cap is not intended to be limited to those shown in FIGS. このような構造のキャップを有する孔であれば、従来の多孔板に比べてガス分散板下部への重合体粒子の落下の問題はない。 If a hole with a cap of this structure, there is no problem of falling of the polymer particles to the gas distribution plate lower than the conventional perforated plate. このキャップを、例えば分散板上円周方向の特定方向に向けて配置することにより、流動化時にガス分散板上に円周方向のガスの流れ、すなわち旋回流ができる。 The cap, for example by arranging for a particular direction of the dispersion plate on the circumferential direction, the circumferential direction of the gas flow on the gas distribution plate during fluidization, i.e. it is swirling flow. この旋回流により、流動層全体、特に層底部における流動・混合が良好なものになる。 This swirling flow, the entire fluidized bed, especially flow-mixing in Sosoko portion becomes good. 又多少の塊が生成したとしてもその遠心力により塊をガス分散板外周部に速やかに移動、旋回させ、塊が大きく成長しないうちに系外へ排出させることができる。 The addition mass also by centrifugal force as generated some lumps immediately move to the gas distribution plate outer peripheral portion, is pivoted, it can be discharged out of the system while the mass does not grow significantly.

【0011】このキャップは、その孔から吹き出たガスが最近接する対角線上の孔と、前記孔とから構成される最小の正方形の一辺であって、前記対角線上の孔を端部とする一辺のほぼ中間部分を通過するように向けて配設される。 [0011] The cap has a diagonal of a hole gas blown from the holes closest to a one side of the smallest square composed of said hole, one side of the end portion of the hole on the diagonal line It disposed toward substantially to pass through the intermediate portion. すなわち、キャップの配置は、図4に示すいずれかの配置を指すものである。 That is, the arrangement of the cap is intended to refer to an arrangement of one shown in FIG. 図4は、最小の正方形に配列された孔に、aおよびbに示す二通りの方向に好ましい角度で配設されたキャップの平面図である。 4, the minimum square array of holes is a plan view of a cap disposed at the preferred angle in the direction of the two ways shown in a and b. つまり、図4において孔10の上部に設けたキャップ2の開口部3の方向、すなわちガス吹き出し方向は、孔30と孔20のほぼ中間点(X)、または孔30と孔40のほぼ中間点(Y)が挙げられる。 In other words, the direction of the opening 3 of the cap 2 which is provided over the hole 10 in FIG. 4, i.e. the gas blowing direction is approximately the midpoint of the hole 30 and the hole 20 (X), or nearly middle point of the hole 30 and the hole 40 (Y). キャップを配設する角度θは、孔10と孔30を結ぶ対角線に対し10〜30 The angle θ to dispose the cap 10 to 30 with respect to diagonal lines connecting the holes 10 and holes 30
゜、好ましくは15〜25゜である。 °, preferably 15 to 25 degrees. ここで角度θを1 Here, the angle θ 1
0〜30゜とした場合、孔10から吹き出したガスは、 If you 0-30 °, gas blown from the hole 10,
下流に位置する孔30と孔20もしくは孔30と40のほぼ中間点(XもしくはY)を通過する。 Passing approximately the midpoint of the hole 30 and the hole 20 or holes 30 and 40 located downstream of the (X or Y). ただし、本発明のガス分散板は、旋回流を発生させるために、さらにキャップのガス吹き出し方向は、図5に示すように、最小の正方形に配列された孔10を通り反応器断面と同心円を成す円周4の接線と、キャップ2の開口部3、すなわちガスの吹き出し方向との成す角度θ' が小さい方を選択すればよい。 However, the gas distribution plate of the present invention, in order to generate a swirling flow, further gas blowing direction of the cap, as shown in FIG. 5, the minimum through reactor bore 10 arranged in a square cross-section and concentric the tangent of the circumference 4 forming an opening 3 of the cap 2, that may be selected whichever angle theta 'is less formed by the blowing direction of the gas. 図5は、図4において孔を通る円周の接線とキャップの吹き出し方向とのなす角度θ' が小さい方を選択したキャップの平面図である。 Figure 5 is a plan view of the cap selecting whichever angle theta 'is small and blowing direction of the circumference of the tangent and the cap through the hole 4. そして、各孔から流れるガスは、実質的に流動層の旋回方向、例えば右旋回方向または左旋回方向に吹き出され、その結果、 Then, the gas flowing from each hole, the turning direction of the substantially fluidized bed, for example, blown out in the rightward turning direction or left turning direction, as a result,
全体として旋回流を発生させる。 Generating a swirling flow as a whole.

【0012】分散板へのキャップの取り付けは、分散板上に発生する旋回流の阻害物とならない方法であれば特に限定されるものではないが、例えば溶接やビス等で行うことができ、中でも溶接が好ましい。 [0012] Mounting of the cap to the dispersion plate, but is not particularly limited as long as it does not become inhibitor of the swirling flow generated in the dispersion plate, it can be carried out, for example, welding or screws or the like, among them welding is preferable.

【0013】また、本発明のガス分散板は、反応器内壁に近いガス分散板外周部に新たに孔が円周上に配置されるとともに、ガスが円周接線方向より外側に吹き出すように上記と同様のキャップが配設される。 [0013] The gas distribution plate of the present invention, the reactor together with new holes in the gas distributor plate the outer peripheral portion is disposed on the circumference near the inner wall, the so gas is blown from the circumferential tangential direction to the outer similar caps and is arranged. その結果、ガスが内壁面に付着する粒子を洗い流し、且つ層底部内壁面近傍の流動・混合を促進することができる。 As a result, wash away the particles adhering to the inner wall surface gas, and it is possible to promote the flow and mixing in the vicinity of the wall surface Sosoko unit. 孔の直径、孔の間隔及び孔と内壁面間の距離は、特に制限されるものではなく、上記効果が得られるものであればよい。 Hole diameter, the distance between the spacing and hole and the inner wall surface of the hole is not particularly limited, as long as the above effect can be obtained. 例えば孔の直径、孔の間隔及び孔と内壁面間の距離は、上記正方形配列の孔の直径、ピッチと同程度、例えば孔の直径が5〜30mm、孔間隔及び孔と内壁面間の距離が15〜400mmである。 For example hole diameter, the distance between the spacing and hole and the inner wall surface of the hole, the distance between the square array of holes of diameter about the same as the pitch, for example, the diameter of the hole is 5 to 30 mm, hole spacing and hole and an inner wall surface There is a 15~400mm. また、好ましくはキャップの吹き出し方向(角度θ”、図6a)は、上記正方形配列の孔から吹き出したガスによる旋回流に沿うよう同一旋回方向に向け、且つ円周接線方向に対し外側に2 Further, 2 preferably blowing direction of the cap (angle theta ", FIG. 6a) is directed in the same turning direction as along the swirling flow by the gas blown from the hole of the square array, and with respect to the circumferential tangential direction to the outer
0〜70゜の角度を有すればよい。 0 to 70 ° angle may if you have.

【0014】反応器の内径が大きい場合、ガス分散板を一体物とすると板の強度上その板厚は数10mm程度必要となり甚だ不経済でしかも製作しにくい。 [0014] When the inner diameter of the reactor is large, the strength of the plate when an integral product gas distribution plate have a plate thickness very uneconomical, yet hardly fabricated requires several 10 mm. 又、板厚及び板の広さにもおのずと制限がある。 Also, there is a naturally limited to the size of the plate thickness and plate. 図6aは、本発明のガス分散板の一例を示す平面図であり、孔を正方形配列に配置し、また最外周の孔は反応器内壁近傍にあり、 Figure 6a is a plan view showing an example of the gas dispersing plate of the present invention, to place the holes in a square array and the outermost periphery of the hole is in the reactor near the inner wall,
反応器断面と同心円を成す同一円周上に孔を等ピッチで配置し、キャップ2は上記したとおり旋回流が発生するような特定の配置としたものである。 The holes on the same circumference forming the reactor cross-section and concentrically arranged at equal pitches, the cap 2 is obtained by the particular arrangement as swirling flow as described above is generated. 図6a中、キャップは分散板の一部にしか示されず、他の部分は省略しているが、他の部分も同一のパターンで全面に配置されている。 In Figure 6a, the cap is not shown only in part of the dispersion plate, while the other parts are omitted, other portions are also disposed on the entire surface in the same pattern. 本発明のガス分散板は、一枚の板で構成することもできるが、図6bに示すように、分散板を構成する板7を二枚以上組み合わせ、一体構造としたガス分散板5 Gas distribution plate of the present invention, can be comprised of a single plate, as shown in FIG. 6b, combination plate 7 constituting the dispersion plate than two, gas distribution plate 5 having an integral structure
とすることもできる。 It can also be a. この場合、ガス分散板上でガスの旋回流を発生させるように各キャップの吹き出し方向は、上記角度範囲内で決定される。 In this case, blowing direction of the cap so as to generate a swirling flow of the gas on the gas distribution plate is determined within the angular range. 設置方法としては、 As the installation method,
各板同士を隙間なく並べて、その接触部分を、例えば溶接ないしビス等により繋ぎあわせ、又ガス分散板の下に分散板支持構造物6を設置してその上に溶接ないしはビス等により固定することにより行なえる。 Each plate together side by side without a gap, the contact portion, for example, joining by welding or screws or the like, also be fixed by welding or screws or the like thereon by installing a dispersion plate support structure 6 below the gas dispersing plate performed by. 本発明のガス分散板は、その外周部以外は孔が正方形配列をとるため、ガス分散板外周部に設けた孔のピッチを適宜調整するだけで孔が支持構造物に塞がれることなく、例えば図6aに示すような従来に比べ簡単な構造の格子状支持構造物が使用できる。 Gas distribution plate of the present invention, therefore other than the outer peripheral portion of the hole takes a square array, without holes simply by suitably adjusting the pitch of the holes provided in the gas distributor plate the outer peripheral portion is closed to the support structure, for example grid-like support structure having a simple structure compared to the conventional as shown in Figure 6a can be used.

【0015】 [0015]

【発明の効果】以上詳述したように、本発明のガス分散板を用いることにより、重合体粒子の滞留により付着・ As described in detail above, by using a gas dispersion plate of the present invention, adhesion and the retention of the polymer particles
塊状化しやすい反応器内壁近傍、或いはガス分散板上の流動・混合状態が改善され、安定した長期連続運転が達成される。 Agglomerated easily reactor near the inner wall, or improves fluidity and mixing conditions on the gas distribution plate, a stable long-term continuous operation is achieved. また、本発明のガス分散板は、従来のガス分散板に比べ製作並びに支持構造物による補強も容易である。 The gas distribution plate of the present invention, the reinforcing is easy due to fabrication and support structure compared to conventional gas distribution plate.

【0016】 [0016]

【実施例】 【Example】

実施例1 内径1000mmの流動層実験装置を用い、ガス分散板直上の流動不良部の有無を測定した。 Using a fluidized bed experimental apparatus of Example 1 inner diameter 1000 mm, it was measured the presence of flow failure portion immediately above the gas distribution plate. 流動層実験装置に使用したガス分散板は、図6aと同タイプのものである。 Gas distribution plate used in the fluidized bed experimental apparatus is in Figure 6a the same type. このガス分散板は、正方形配列に配列された孔の直径が16mm、孔のピッチが66mmとした。 The gas distribution plate, the diameter of which are arranged in a square array holes 16 mm, the pitch of the holes was set to 66 mm. また、反応器内壁に近いガス分散板外周部の孔の直径は16m The diameter of the holes of the gas distribution plate outer peripheral portion close to the inner wall of the reactor is 16m
m、孔のピッチは66mmとした。 m, the pitch of the holes was set to 66 mm. さらに、反応器内壁に近いガス分散板外周部の孔の上のキャップの吹き出し方向は、正方形配列の孔から吹き出したガスによる旋回流に沿うように同一方向に向け、かつ円周接線方向に対して30°の角度とした。 Furthermore, blowing direction of the cap on the holes of the gas distribution plate outer peripheral portion close to the inner wall of the reactor is directed in the same direction along the swirl flow by gas blown out from the pores of the square array, and with respect to the circumferential tangential direction and an angle of 30 ° Te. なお、キャップは、図1に示したものと同タイプのものであり、その開口部を半円形としたキャップを使用した。 Incidentally, the cap is of the same type as that shown in FIG. 1 was used caps the opening semicircular. この上に着色したポリエチレン粒子(平均粒子径920μm)をキャップが埋没するまで一面に敷き、その上に未着色の同ポリエチレン粒子を1.5mの高さまで充填した。 Laying polyethylene particles colored on the (average particle diameter 920μm) on one side to the cap is buried, it was charged with the polyethylene particles uncolored thereon to a height of 1.5 m. この状態で常圧の窒素ガスを流量1400m 3 /hrで送り込み5分間流動化させた。 Nitrogen gas at normal pressure were fed 5 minutes fluidized at a flow rate of 1400 m 3 / hr in this state. その後、重合体粒子を上方から少しずつ抜き出し、ガス分散板上に残っている着色したポリエチレン粒子の位置を観察したところ、孔と孔の間・反応器内壁近傍を含めガス分散板全域にわたって着色したポリエチレン粒子はほとんど観察されなかった。 Thereafter, the polymer particles withdrawn little by little from above, observation of the position of the colored polyethylene particles remaining on the gas distribution plate, colored throughout the gas distribution plate throughout, including between-reactor near the inner wall of the hole and the hole polyethylene particles was hardly observed.

【0017】比較例1 実施例1のガス分散板において、反応器内壁近傍の円周上に配置したキャップに栓をして実施例1と同じ方法で実施した結果、内壁近傍に部分的に着色したポリエチレン粒子が分散されずに残っていた。 [0017] In the gas distribution plate of Comparative Example 1 Example 1, the inner wall of the reactor result of performing stoppered in the same manner as in Example 1 to the cap arranged on the circumference in the vicinity, partially colored near the inner wall polyethylene particles was left without being dispersed.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明で用いるキャップの一具体例を示す図面であり、aは孔の上に取り付けたキャップの平面図、b [1] is a diagram showing a specific example of a cap for use in the present invention, a is a plan view of the cap attached to the top of the hole, b
はその側面図、及びcはその立面図を示す。 It is a side view, and c is the elevational view.

【図2】本発明で用いるキャップの一具体例を示す図面であり、aは孔の上に取り付けたキャップの平面図、b Figure 2 is a view showing a specific example of a cap for use in the present invention, a is a plan view of the cap attached to the top of the hole, b
はその側面図、及びcはその立面図を示す。 It is a side view, and c is the elevational view.

【図3】本発明で用いるキャップの一具体例を示す図面であり、aは孔の上に取り付けたキャップの平面図、b [Figure 3] is a diagram showing a specific example of a cap for use in the present invention, a is a plan view of the cap attached to the top of the hole, b
はその側面図、及びcはその立面図を示す。 It is a side view, and c is the elevational view.

【図4】最小の正方形に配列された孔に、二通りの方向に好ましい角度で配設されたキャップの平面図である。 In Figure 4 the smallest square array of holes is a plan view of a cap disposed at the preferred angle in the direction of two ways.

【図5】図2において孔を通る円周の接線とキャップの吹き出し方向との成す角度θ'が小さい方を選択した場合のキャップ配置の平面図である。 5 is a plan view of a cap arrangement when selecting whichever angle between blowing direction of the circumference of the tangent and the cap through a hole theta 'is smaller in FIG.

【図6】本発明のガス分散板の一具体例を示す平面図であり、aはキャップが分散板の一部に示されたガス分散板の平面図であり、bは分散板を構成する板の一部を取り出した平面図である。 [Figure 6] is a plan view showing a specific example of a gas distribution plate of the present invention, a is a plan view of the gas distribution plate cap is shown in a portion of the dispersion plate, b constitute a dispersion plate is a plan view taken out a part of the plate.

【符号の説明】 DESCRIPTION OF SYMBOLS

1、10、20、30及び40・・・孔、2・・・キャップ、3・・・キャップ開口部、4・・・孔を通り反応器断面と同心円を成す円周、5・・・分散板、6・・・ 1,10,20,30 and 40 ... hole, 2 ... cap, 3 ... cap opening, circumferential forming the through reactor section and concentric with 4 ... hole, 5 ... dispersion plate, 6 ...
分散板支持構造物、7・・・分散板を構成する板 Plate constituting the dispersion plate support structure, the 7 ... dispersing plate

Claims (10)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】流動層型反応器のガス分散板において、多数の孔を正方形配列に配置し、ガスが分散板に沿って水平方向へ吹き出すようにした外形が流線型であるキャップを該孔の上に配設し、該方向が実質的に流動層の旋回方向であり、しかも孔(10、20、30及び40)で形成される最小の正方形において、該方向は該キャップが配設された孔(10)の対角線上の孔(30)とその他の孔(20または40)のほぼ中間点(XまたはY) 1. A fluidized bed reactor of the gas distribution plate, placed a number of holes in a square array, contour the gas was blown out horizontally along the distributor plate cap of pores is streamlined disposed above said direction is the turning direction of the substantially fluidized bed, yet at the minimum square formed by holes (10, 20, 30 and 40), the direction the cap is disposed hole approximately the midpoint of the diagonal hole (30) and the other hole (10) (20 or 40) (X or Y)
    の向きにあると共に、反応器断面と同心円をなす円周の接線とのなす角度の小さい方を選択し、さらに、最外周の孔は反応器内壁近傍にあって、反応器断面と同心円を成す円周上にあり、その上に上記と同様のキャップをガスが当該円周の接線方向より外側に吹き出すように配設してなることを特徴とする流動層型反応器のガス分散板。 Together in the direction of, select the smaller angle between the circumferential tangent forming the reactor cross section and concentric, further, the outermost holes In the inner wall of the reactor near, forming the reactor cross section and concentric is on the circumference, fluidized bed reactor gas distribution plate gas similar cap and the thereon is characterized by being arranged to blow outside the tangential direction of the circumference.
  2. 【請求項2】キャップが、その開口部の外形線を半円形としたキャップである請求項1記載のガス分散板。 2. A cap, gas distribution plate of claim 1, wherein the outline of the opening is a cap that is semicircular.
  3. 【請求項3】キャップが、その開口部の外形線を三角形としたキャップである請求項1記載のガス分散板。 3. A cap, gas distribution plate of claim 1 wherein the cap has a triangular outline of the opening.
  4. 【請求項4】キャップが、その開口部の外形線を四角形としたキャップである請求項1記載のガス分散板。 4. A cap, gas distribution plate of claim 1 wherein the cap has a quadrangular outline of the opening.
  5. 【請求項5】正方形配列に配列された孔の直径が5〜3 The diameter of 5. arranged in a square array holes 5 to 3
    0mm、孔のピッチが15〜400mmである請求項1 0 mm, according to claim 1 pitch of the holes is 15~400mm
    記載のガス分散板。 Gas distribution plate according.
  6. 【請求項6】反応器内壁近傍に同一円周上に配列された孔の直径が5〜30mm、孔間隔及び孔と内壁面間の距離が15〜400mmである請求項1記載のガス分散板。 6. The inner wall of the reactor diameter holes arranged on the same circumference in the vicinity of 5 to 30 mm, the gas distribution plate of claim 1, wherein the distance between the inner wall surface and the hole spacing and hole are 15~400mm .
  7. 【請求項7】最外周の孔の上部にあるキャップが、反応器断面と同心円をなす円周の接線方向に対して外側に2 7. A cap on top of the outermost holes, 2 outwardly with respect to the tangential direction of the circumference forming the reactor cross section and concentric
    0〜70°の角度で配設されてなる請求項1記載のガス分散板。 0-70 are disposed at an angle of ° formed by Claim 1 gas distribution plate according.
  8. 【請求項8】ガス分散板が、分散板を構成する板(7) 8. Gas distribution plate constitutes the dispersion plate plate (7)
    を少くとも2枚組合せて一体構造としてなるガス分散板である請求項1記載のガス分散板。 The least a gas dispersion plate formed as an integral structure in combination two claim 1 gas distribution plate according.
  9. 【請求項9】ガス分散板が、流動層内に攪拌機を有するガス分散板である請求項1記載のガス分散板。 9. gas dispersion plate, the gas distribution plate of claim 1 wherein the gas distribution plate having an agitator in a fluidized layer.
  10. 【請求項10】ガス分散板が、該板の下面に支持構造物(6)を設置し、補強してなるガス分散板である請求項1記載のガス分散板。 10. A gas distribution plate, placed support structure on the lower surface of the plate (6), the gas distribution plate of claim 1 wherein the gas distribution plate made reinforced.
JP4287374A 1992-10-26 1992-10-26 Fluidized bed reactor gas distributor plate Expired - Fee Related JP2722969B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP4287374A JP2722969B2 (en) 1992-10-26 1992-10-26 Fluidized bed reactor gas distributor plate
GB9321985A GB2271727B (en) 1992-10-26 1993-10-26 Gas distributor plate for fluidized bed reactors
SG1996003976A SG43885A1 (en) 1992-10-26 1993-10-26 Gas distributor plate for fluidized bed reactors

Publications (2)

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JPH06136013A JPH06136013A (en) 1994-05-17
JP2722969B2 true JP2722969B2 (en) 1998-03-09

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US6414093B1 (en) 1999-12-10 2002-07-02 Sumitomo Chemical Company, Limited Method and Apparatus for detecting agglomerates
JP4627112B2 (en) * 1999-12-10 2011-02-09 住友化学株式会社 Agglomerated substance detection method, agglomerated substance detection apparatus, fluidized bed olefin polymerization reaction apparatus equipped with the apparatus, and olefin polymerization method
JP3657485B2 (en) 1999-12-10 2005-06-08 住友化学株式会社 Agglomerated substance detection method, agglomerated substance detection apparatus, fluidized bed olefin polymerization reaction apparatus equipped with the apparatus, and olefin polymerization method
US6958376B2 (en) 2002-10-24 2005-10-25 Exxonmobil Chemical Patents Inc. Inlet distribution device for upflow polymerization reactors
EP1577003A1 (en) 2004-03-15 2005-09-21 Borealis Technology Oy Method and apparatus for producing polymers
DE102004056611B4 (en) * 2004-11-24 2013-11-14 Dr. Gerhard Müller e.K. Fluidized bed reactor
EP1962998A1 (en) * 2005-12-23 2008-09-03 Siemens VAI Metals Technologies GmbH & Co Distributor bottom
JP2008044978A (en) * 2006-08-11 2008-02-28 Sumitomo Chemical Co Ltd Method for producing olefin polymer
EP2101908A1 (en) * 2006-11-30 2009-09-23 Westlake Longview Corporation Gas distribution plate for fluidized-bed olefin polymerization reactors equipped with flowrate or pressure sensors to detect grid fouling
CN103203590B (en) * 2012-01-17 2015-12-02 游利 A kind of new dielectric etch machine gas distributor processing technology
CN106922484A (en) * 2017-02-16 2017-07-07 南京信息工程大学 Humidify the distribution method of region shower nozzle

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GB9321985D0 (en) 1993-12-15

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