摘要:
An apparatus, for separating liquid droplets out of a feed gas stream, includes a delay vessel for preliminary separation of some of the liquid droplets out of the feed gas stream under gravity, with an inlet line for the feed gas stream and an outlet line for the gas stream which has been depleted of liquid droplets and which flows out of the delay vessel and a tangential supply thereof into a centrifugal droplet separator. The outlet line is arranged in the upper region of the delay vessel and spaced apart from the inlet line to such an extent that the delay time of the gas stream in the delay vessel is at a maximum, and with an outlet line for the liquid separated in the delay vessel at the base thereof.
摘要:
Apparatus for the polymerization of olefins, in particular ethylene, comprising a gas-phase fluidized-bed reactor (1), a product offtake line (15) for taking polymer particles either continuously or discontinuously from the reactor (1), which line (15) is connected to a depressurization vessel (2) for separating polymer particles and gas, a recycle gas filter (3) for freeing the gas of entrained fine particles connected to the depressurization vessel (2), a compressor which compresses the gas which has been freed of fine particles and recirculates it into the reactor (1), with the recycle gas filter (3) having an inlet chamber (4) provided with a gas inlet (6), an outlet chamber (5) provided with a gas outlet (7), an essentially vertical sheet-like filter medium (9) for retaining the fine particles which separates the inlet chamber (4) from the outlet chamber (5) and a particle outlet (8). The inlet chamber (4) has a dividing wall (10) which is arranged essentially parallel to the filter medium (9) and separates the inlet chamber (4) into an inflow region (4a), which is connected to the gas inlet (6), and a filter region (4b) in which the filter medium is located and has an upper opening and a lower opening which are dimensioned so that from 60 to 90% of the volume flow flows through the upper opening so that flow along the filter medium (9) from the top downward results.
摘要:
An apparatus for the polymerization of olefins, in particular ethylene, comprising a gas-phase fluidized-bed reactor (1), a recycle gas line (2) connected to the reactor for discharging and recirculating the recycle gas stream comprising the unpolymerized olefin and a cyclone (3) located in the recycle gas line for the reduction and precipitation of the solid particles entrained in the recycle gas from the reactor, with the cyclone comprising an upper section (3a) which has an essentially vertical central axis, whose wall extends along a rotationally symmetric body and which is provided with a cyclone inlet (4) arranged eccentrically relative to the central axis, a middle section (3b) which adjoins the upper section (3a) and whose wall extends along a rotationally symmetric body which tapers in a downward direction, a lower section (3c) for discharging the solid particles precipitated from the recycle gas which adjoins the middle section (3b) and whose wall extends along a rotationally symmetric body and a tube (5) extending essentially axially symmetrically down into the upper section and, if appropriate, the middle section for discharging the recycle gas which has been freed of the particles. According to the invention the ratio Hi of the distance hi from the lower end of the tube (5) extending downward into the cyclone to the intersection (6) of an imaginary extension of the wall of the downward-extending tube (5) with the wall of the middle section (3b) to the diameter di of the downward-extending tube (5) is from 3 to 8, in particular from 4 to 7.
摘要翻译:用于烯烃聚合的装置,特别是乙烯,包括气相流化床反应器(1),连接到反应器的再循环气体管线(2),用于排出和再循环包含未聚合烯烃的循环气流和 旋流器(3),其位于循环气体管线中,用于还原和沉淀夹带在来自反应器的再循环气体中的固体颗粒,旋风分离器包括具有基本上垂直的中心轴线的上部分(3a),其上壁延伸 沿着旋转对称体并且设置有相对于中心轴线偏心布置的旋风入口(4),邻近上部(3a)并且其壁沿旋转对称体延伸的中间部分(3b) 用于排出邻近中间部分(3b)并且其壁延伸的再循环气体沉淀的固体颗粒的下部分(3c) 旋转对称体和基本上轴向对称地延伸到上部的管(5)以及适当的中间部分用于排出已经没有颗粒的循环气体。 根据本发明,与从下游进入旋风分离器的管(5)的下端距离h i i的距离h i i的比例H i 向下延伸的管(5)的壁与中间部分(3b)的壁与向下延伸的管(5)的直径d iI i的假想延伸为3至 8,特别是4到7。
摘要:
What is proposed is an apparatus for separating liquid droplets out of a feed gas stream comprising them comprising a delay vessel (1) for preliminary separation of some of the liquid droplets out of the feed gas stream under the action of gravity, with an inlet line (2) for the feed gas stream into the delay vessel (1) and an outlet line (3) for the gas stream which has been depleted of liquid droplets and flows out of the delay vessel (1), and tangential supply thereof into a centrifugal droplet separator (4), the outlet line (3) being arranged in the upper region of the delay vessel (1) and being spaced apart from the inlet line (2) to such an extent that the delay time of the gas stream in the delay vessel (1) is at a maximum, and with an outlet line (5) for the liquid separated in the delay vessel (1) at the base thereof,and wherein the centrifugal droplet separator (4) used is an axially symmetric apparatus with a vertical longitudinal axis and circular cross section, with a jacket and hoods at the upper and lower ends of the jacket, and wherein an outlet stub (6) for the liquid separated in the centrifugal droplet separator (4) is arranged in the region of the lower hood of the centrifugal droplet separator (4) and has such dimensions that it is immersed into the liquid standing at the base of the delay vessel (1) or into a liquid standing in a cup in the interior of the delay vessel (1), and with a gas outlet stub (7) at the upper end of the centrifugal droplet separator (4) for the gas stream purified further in the centrifugal droplet separator (4), and wherein both the supply of the gas stream depleted of liquid droplets from the delay vessel (1) via the outlet line (3) and the removal of the liquid separated in the centrifugal droplet separator (4) via line (6) into the delay vessel (1) are effected without the use of pumps and shutoff devices.
摘要:
An apparatus for the polymerization of olefins, in particular ethylene, comprising a gas-phase fluidized-bed reactor (1), a recycle gas line (2) connected to the reactor for discharging and recirculating the recycle gas stream comprising the unpolymerized olefin and a cyclone (3) located in the recycle gas line for the reduction and precipitation of the solid particles entrained in the recycle gas from the reactor, with the cyclone comprising an upper section (3a) which has an essentially vertical central axis, whose wall extends along a rotationally symmetric body and which is provided with a cyclone inlet (4) arranged eccentrically relative to the central axis, a middle section (3b) which adjoins the upper section (3a) and whose wall extends along a rotationally symmetric body which tapers in a downward direction, a lower section (3c) for discharging the solid particles precipitated from the recycle gas which adjoins the middle section (3b) and whose wall extends along a rotationally symmetric body and a tube (5) extending essentially axially symmetrically down into the upper section and, if appropriate, the middle section for discharging the recycle gas which has been freed of the particles. According to the invention the ratio Hi of the distance hi from the lower end of the tube (5) extending downward into the cyclone to the intersection (6) of an imaginary extension of the wall of the downward-extending tube (5) with the wall of the middle section (3b) to the diameter di of the downward-extending tube (5) is from 3 to 8, in particular from 4 to 7.
摘要:
Apparatus for the polymerization of olefins, in particular ethylene, comprising a gas-phase fluidized-bed reactor (1), a product offtake line (15) for taking polymer particles either continuously or discontinuously from the reactor (1), which line (15) is connected to a depressurization vessel (2) for separating polymer particles and gas, a recycle gas filter (3) for freeing the gas of entrained fine particles connected to the depressurization vessel (2), a compressor which compresses the gas which has been freed of fine particles and recirculates it into the reactor (1), with the recycle gas filter (3) having an inlet chamber (4) provided with a gas inlet (6), an outlet chamber (5) provided with a gas outlet (7), an essentially vertical sheet-like filter medium (9) for retaining the fine particles which separates the inlet chamber (4) from the outlet chamber (5) and a particle outlet (8). The inlet chamber (4) has a dividing wall (10) which is arranged essentially parallel to the filter medium (9) and separates the inlet chamber (4) into an inflow region (4a), which is connected to the gas inlet (6), and a filter region (4b) in which the filter medium is located and has an upper opening and a lower opening which are dimensioned so that from 60 to 90% of the volume flow flows through the upper opening so that flow along the filter medium (9) from the top downward results.