WO2023216658A1 - 一种spg工艺制聚烯烃用汽蒸器 - Google Patents

一种spg工艺制聚烯烃用汽蒸器 Download PDF

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Publication number
WO2023216658A1
WO2023216658A1 PCT/CN2023/075424 CN2023075424W WO2023216658A1 WO 2023216658 A1 WO2023216658 A1 WO 2023216658A1 CN 2023075424 W CN2023075424 W CN 2023075424W WO 2023216658 A1 WO2023216658 A1 WO 2023216658A1
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WIPO (PCT)
Prior art keywords
cylinder
steamer
stirring shaft
polyolefin production
process according
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PCT/CN2023/075424
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English (en)
French (fr)
Inventor
张万尧
马天鑫
陈永涛
王建刚
刘立新
张晓阳
张毅
梁元月
崔忠
周钰君
吴炳珑
崔建航
Original Assignee
天华化工机械及自动化研究设计院有限公司
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Publication of WO2023216658A1 publication Critical patent/WO2023216658A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F26B11/0463—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall
    • F26B11/0477—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for mixing, stirring or conveying the materials to be dried, e.g. mounted to the wall, rotating with the drum
    • F26B11/0486—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for mixing, stirring or conveying the materials to be dried, e.g. mounted to the wall, rotating with the drum the elements being held stationary, e.g. internal scraper blades
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00—Post-polymerisation treatments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/008—Seals, locks, e.g. gas barriers or air curtains, for drying enclosures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/02—Applications of driving mechanisms, not covered by another subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/04—Agitating, stirring, or scraping devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/14—Chambers, containers, receptacles of simple construction
    • F26B25/16—Chambers, containers, receptacles of simple construction mainly closed, e.g. drum

Definitions

  • the present invention relates to the technical field of steamers, and in particular to a steamer for producing polyolefins using the SPG process.
  • the SPG process is my country's independently innovative continuous polyolefin production process. It is suitable for the continuous transformation of many batch polyolefin units and the construction of large-scale polyolefin units. SPG has a simple process flow, low equipment cost, easy product quality control, and a wide range of product grades. Its promotion and development prospects are very broad.
  • the steamer is one of the core equipment in the SPG process, and its equipment performance directly affects product performance. At present, its equipment still uses the structure of other process devices. Due to different process technologies, the parameters in its process are different, resulting in equipment performance that does not meet expectations. Therefore, it is of great significance to develop a steamer structure suitable for the SPG process.
  • the present invention provides a steamer for producing polyolefin through SPG process to improve drying efficiency.
  • the present invention provides the following solutions:
  • the invention provides a steamer for producing polyolefin through SPG process, which includes a cylinder; the top of the cylinder is provided with a feed port and an air outlet; the lower side of the cylinder is provided with an air inlet; and the bottom of the cylinder A discharge port is provided; a stirring shaft is provided in the cylinder, and the top of the stirring shaft is drivingly connected to a driving mechanism.
  • the stirring shaft is a hollow shaft, and a rotating joint is provided on the top of the stirring shaft, and the rotating joint is located outside the cylinder.
  • At least one set of blades is provided at the middle and lower part of the stirring shaft.
  • a breather tube is provided on the bottom surface of the blade, one end of the breather tube is connected to the hollow part of the hollow shaft, and a plurality of small holes are provided on the breather tube.
  • the driving mechanism includes a motor, a reducer, a sprocket and a chain; the top of the stirring shaft is provided with a sprocket, the motor is connected to the input shaft of the reducer, and the reducer
  • the output shaft is provided with another sprocket, and the chain is disposed between the two sprockets.
  • a distribution plate is provided at the bottom of the cylinder, the top of the distribution plate is connected to the inner wall of the cylinder, and the bottom of the distribution plate is connected to the top of the discharge port; the air inlet is The height position is at the middle and lower part of the distribution plate; a plurality of ventilation holes are provided on the distribution plate.
  • the side walls and top of the barrel are provided with jackets.
  • a sealing packing is provided between the top of the barrel and the stirring shaft.
  • the outer wall of the cylinder is provided with ears.
  • the aspect ratio of the cylinder is (1-10):1.
  • the length-to-diameter ratio of the cylinder is reduced, which increases the contact area between gas and materials, reduces the residence time of cold gas after heat exchange, and improves drying efficiency.
  • the stirring shaft is set as a hollow shaft, and a ventilation pipe is connected to it for spraying steam, thereby increasing the heat source and improving the drying efficiency.
  • the purpose of converting the external heat source to the rotating blades is achieved by arranging a rotating joint.
  • Figure 1 is a schematic structural diagram of a steamer for producing polyolefins using the SPG process of the present invention.
  • this embodiment provides a steamer for polyolefin production using the SPG process, including a cylinder 201; a feed port 202 and an air outlet 203 are provided on the top of the cylinder 201; The air port 204; the bottom of the cylinder 201 is provided with a discharge port 206; the cylinder 201 is provided with a stirring shaft, and the top of the stirring shaft is drivingly connected to a driving mechanism.
  • a top flange is provided on the top of the cylinder 201, the top of the stirring shaft passes through the top flange, and a sealing packing 500 is provided between the inner wall of the top flange and the stirring shaft.
  • the part of the stirring shaft located above the cylinder 201 is provided with a sprocket 103.
  • the sprocket 103 is connected to the sprocket 103 on the reducer 102 through a transmission chain 104.
  • the motor 101 drives the reducer 102 to realize the rotational drive of the stirring shaft.
  • the stirring shaft is a hollow shaft 301, and a rotating joint 400 is provided on the top of the stirring shaft.
  • the rotating joint 400 is located outside the cylinder 201.
  • Two sets of blades 302 are provided at the middle and lower part of the stirring shaft, and each set of blades 302 includes a plurality of stirring blades 302 .
  • a vent tube 303 is provided on the bottom surface of the blade 302. One end of the vent tube 303 is connected to the hollow part of the hollow shaft 301.
  • the vent tube 303 is provided with a plurality of small holes.
  • the steam passes into the hollow part of the stirring shaft through the rotating structure, and flows out through multiple small holes in the vent pipe 303.
  • the heat exchange area of the steam is increased through the vent pipe 303 and the blades 302, reducing the heat exchange time and improving the drying efficiency.
  • a distribution plate 205 is provided at the inner bottom of the cylinder 201.
  • the top of the distribution plate 205 is connected to the inner wall of the cylinder 201.
  • the bottom of the distribution plate 205 is connected to the top of the outlet 206; the height of the air inlet 204 is in the middle of the distribution plate 205. Lower part;
  • the distribution plate 205 is provided with a plurality of ventilation holes. The steam entering the air inlet 204 enters the interior of the cylinder 201 through the multiple ventilation holes on the distribution plate 205. On the one hand, the material will not block the air inlet 204, and on the other hand, the steam entering from the air inlet 204 is distributed more evenly. Further improve drying efficiency.
  • Jackets 207 are provided on the side walls and top of the cylinder 201 to improve the thermal insulation effect of the cylinder 201 and save energy while improving drying efficiency.
  • the outer wall of the cylinder 201 is provided with ears 208.
  • the lugs 208 are used for installation and fixation of the cylinder 201.
  • the aspect ratio of the cylinder is (1-10):1.
  • the aspect ratio of the cylinder is preferably 4:1.
  • the length-to-diameter ratio of the cylinder is smaller, which increases the contact area between gas and material, reduces the residence time of cold gas after heat exchange, and improves drying efficiency.
  • the motor 101 and the reducer 102 are started to drive the hollow shaft 301 to rotate, and steam is introduced from the rotary joint 400 and the air inlet 204, and then the material is introduced from the feed port 202. After a certain period of time, the heat-exchanged gas is discharged from the gas outlet 203, and the dried material is discharged from the discharge port 206.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

本发明公开一种SPG工艺制聚烯烃用汽蒸器，涉及汽蒸器技术领域，包括筒体；所述筒体顶部设置有进料口和出气口；所述筒体下部一侧设置有进气口；所述筒体底部设置有出料口；所述筒体内设置有搅拌轴，所述搅拌轴的顶部与一驱动机构传动连接。本发明中筒体的长径比减小，增加气体与物料的接触面积，减少换热后冷气体停留时间，提高干燥效率。本发明中搅拌轴设置为空心轴，并在上面连接通气管，用于喷蒸汽，从而增加热源，提高干燥效率。本发明中通过设置旋转接头，来达到把外部热源转化到旋转叶片上的目的。

Description

一种SPG工艺制聚烯烃用汽蒸器 技术领域
本发明涉及汽蒸器技术领域，特别是涉及一种SPG工艺制聚烯烃用汽蒸器。
 背景技术
随着我国聚烯烃产能的快速增长, 国内聚烯烃产能自给率及新产品需求日益增长。因此，改进聚烯烃生产工艺、生产工艺的国产化意义重大。
SPG工艺是我国自主创新的连续法制聚烯烃工艺，既适用于众多间歇法聚烯烃装置的连续化改造，也适用于大型化聚烯烃装置建设。SPG工艺流程简单,设备成本低,产品质量易于控制,产品牌号范围广,其推广和发展的前景非常广阔。
 技术问题
汽蒸器是SPG工艺流程中的核心设备之一，其设备性能直接影响产品性能。目前，其设备仍然沿用其他工艺装置中的结构，由于工艺技术不一样，导致其流程中的参数不一样，从而导致设备性能达不到预期。因此，研发适合SPG工艺的汽蒸器结构，意义重大。
 技术解决方案
为解决以上技术问题，本发明提供一种SPG工艺制聚烯烃用汽蒸器，以提高干燥效率。
为实现上述目的，本发明提供了如下方案：
本发明提供一种SPG工艺制聚烯烃用汽蒸器，包括筒体；所述筒体顶部设置有进料口和出气口；所述筒体下部一侧设置有进气口；所述筒体底部设置有出料口；所述筒体内设置有搅拌轴，所述搅拌轴的顶部与一驱动机构传动连接。
可选的，所述搅拌轴为空心轴，所述搅拌轴的顶部设置有一旋转接头，所述旋转接头位于所述筒体外部。
可选的，所述搅拌轴的中下部设置有至少一组叶片。
可选的，所述叶片底面上设置有通气管，所述通气管一端与所述空心轴的中空部分连通，所述通气管上设置有多个小孔。
可选的，所述驱动机构包括电机、减速机、链轮和链条；所述搅拌轴的顶部设置有一所述链轮，所述电机与所述减速机的输入轴相连接，所述减速机的输出轴设置有另一所述链轮，所述链条设置于两个所述链轮之间。
可选的，所述筒体内底部设置有分布板，所述分布板顶部与所述筒体内壁相连接，所述分布板底部与所述出料口的顶部相连接；所述进气口的高度位置处于所述分布板的中下部；所述分布板上设置有多个透气孔。
可选的，所述筒体的侧壁及顶部设置有夹套。
可选的，所述筒体顶部与所述搅拌轴之间设置有密封填料。
可选的，所述筒体外壁设置有支耳。
可选的，所述筒体的长径比为（1-10）:1。
 有益效果
1、本发明中筒体的长径比减小，增加气体与物料的接触面积，减少换热后冷气体停留时间，提高干燥效率。
2、本发明中搅拌轴设置为空心轴，并在上面连接通气管，用于喷蒸汽，从而增加热源，提高干燥效率。
3、本发明中通过设置旋转接头，来达到把外部热源转化到旋转叶片上的目的。
 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明SPG工艺制聚烯烃用汽蒸器的结构示意图。
附图标记说明：101-电机；102-减速机；103-链轮；104-链条；201-筒体；202-进料口；203-出气口；204-进气口；205-分布板；206-出料口；207-夹套；208-支耳；301-空心轴；302-叶片；303-通气管；400-旋转接头；500-密封填料。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1所示，本实施例提供一种SPG工艺制聚烯烃用汽蒸器，包括筒体201；筒体201顶部设置有进料口202和出气口203；筒体201下部一侧设置有进气口204；筒体201底部设置有出料口206；筒体201内设置有搅拌轴，搅拌轴的顶部与一驱动机构传动连接。
于本具体实施例中，筒体201顶部设置有顶部法兰，搅拌轴的顶端穿过顶部法兰，在顶部法兰的内壁与搅拌轴之间设置有密封填料500。
搅拌轴位于筒体201上方的部分设置有一链轮103，该链轮103通过传动链条104与减速机102上的链轮103传动连接，通过电机101驱动减速机102实现对搅拌轴的旋转驱动。
搅拌轴为空心轴301，搅拌轴的顶部设置有一旋转接头400，旋转接头400位于筒体201外部。搅拌轴的中下部设置有两组叶片302，每组叶片302包括多个搅拌叶片302。叶片302底面上设置有通气管303，通气管303一端与空心轴301的中空部分连通，通气管303上设置有多个小孔。蒸汽通过旋转结构通入搅拌轴的空心部分，并通过通气管303上的多个小孔流出，通过通气管303和叶片302增加蒸汽的换热面积，减少换热时间，提高干燥效率。
筒体201内底部设置有分布板205，分布板205顶部与筒体201内壁相连接，分布板205底部与出料口206的顶部相连接；进气口204的高度位置处于分布板205的中下部；分布板205上设置有多个透气孔。进气口204进入的蒸汽经分布板205上的多个透气孔进入筒体201内部，一方面物料不会堵塞进气口204，另一方面使从进气口204进入的蒸汽分布更加均匀，进一步提高干燥效率。
筒体201的侧壁及顶部设置有夹套207，以提高筒体201的保温效果，在提高干燥效率的同时节约能源。
筒体201外壁设置有支耳208。支耳208用于筒体201的安装固定。
本发明中，筒体的长径比为（1-10）:1，于本具体实施例中，筒体的长径比优选4:1。筒体的长径比更小，增加了气体与物料的接触面积，减少换热后冷气体停留时间，提高干燥效率
设备运行时，启动电机101减速机102，带动空心轴301旋转，并从旋转接头400及进气口204处通入蒸汽，然后从进料口202通入物料。经过一定时间后，换热后的气体由出气口203排出，干燥后的物料由出料口206排出。
需要说明的是，对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内，不应将权利要求中的任何附图标记视为限制所涉及的权利要求。
本说明书中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处。综上所述，本说明书内容不应理解为对本发明的限制。

Claims (10)

  1. 一种SPG工艺制聚烯烃用汽蒸器，其特征在于，包括筒体；所述筒体顶部设置有进料口和出气口；所述筒体下部一侧设置有进气口；所述筒体底部设置有出料口；所述筒体内设置有搅拌轴，所述搅拌轴的顶部与一驱动机构传动连接。
  2. 根据权利要求1所述的SPG工艺制聚烯烃用汽蒸器，其特征在于，所述搅拌轴为空心轴，所述搅拌轴的顶部设置有一旋转接头，所述旋转接头位于所述筒体外部。
  3. 根据权利要求2所述的SPG工艺制聚烯烃用汽蒸器，其特征在于，所述搅拌轴的中下部设置有至少一组叶片。
  4. 根据权利要求3所述的SPG工艺制聚烯烃用汽蒸器，其特征在于，所述叶片底面上设置有通气管，所述通气管一端与所述空心轴的中空部分连通，所述通气管上设置有多个小孔。
  5. 根据权利要求1所述的SPG工艺制聚烯烃用汽蒸器，其特征在于，所述驱动机构包括电机、减速机、链轮和链条；所述搅拌轴的顶部设置有一所述链轮，所述电机与所述减速机的输入轴相连接，所述减速机的输出轴设置有另一所述链轮，所述链条设置于两个所述链轮之间。
  6. 根据权利要求1所述的SPG工艺制聚烯烃用汽蒸器，其特征在于，所述筒体内底部设置有分布板，所述分布板顶部与所述筒体内壁相连接，所述分布板底部与所述出料口的顶部相连接；所述进气口的高度位置处于所述分布板的中下部；所述分布板上设置有多个透气孔。
  7. 根据权利要求1所述的SPG工艺制聚烯烃用汽蒸器，其特征在于，所述筒体的侧壁及顶部设置有夹套。
  8. 根据权利要求1所述的SPG工艺制聚烯烃用汽蒸器，其特征在于，所述筒体顶部与所述搅拌轴之间设置有密封填料。
  9. 根据权利要求1所述的SPG工艺制聚烯烃用汽蒸器，其特征在于，所述筒体外壁设置有支耳。
  10. 根据权利要求1所述的SPG工艺制聚烯烃用汽蒸器，其特征在于，所述筒体的长径比为（1-10）:1。
PCT/CN2023/075424 2022-05-11 2023-02-10 一种spg工艺制聚烯烃用汽蒸器 WO2023216658A1 (zh)

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