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1、UNIPOL PE Process DescriptionUNIPOL PE工艺描述TABLE OF CONTENTSPROCESS DESCRIPTION1.1Contract Plant Composition1.1.1PE Process Unit1.1.2Supporting Facilities1.1.3Auxiliary Facilities1.2Process Introduction1.2.1Description of PE Process Unit1.2.2Description of Supporting Facilities1.2.3Description of Aux
2、iliary Facilities目 录工艺描述1.1 装置组成 1.1.1 PE 工艺单元 1.1.2 配套设施 1.1.3 辅助设施 1.2 工艺介绍 1.2.1 PE 工艺单元描述 1.2.2 配套设施描述 1.2.3 辅助设施描述1.1Contract Plant CompositionThe Contract Plant produces 300,000 TPY of pelleted Linear Low, Medium, and High Density Polyethylene from ethylene, which may involve the addition of a
3、 comonomer (butene-1 or hexene-1) for some Products. The Contract Plant Battery Limits is represented in the diagram provided in Attachment 11 of this Appendix. The Contract Plant consists of the following systems.1.1 合同装置组成本合同装置是用乙烯为单体，可能会引入丁烯-1 或己烯-1 为共聚单体来生产高、 低、中密度聚乙烯树脂的装置，产能为30 万吨/年。合同装置界区范围见本附
4、件的附录1- 1。本合同装置由下列系统组成：1.1.1PE Process UnitThe PE Process Unit utilizes Univation Technologies UNIPOL PE Process, a low pressure gas phase polymerization process, and includes the following process systems:Raw Material Supply and PurificationEthylene PurificationReaction (includes catalyst handling a
5、nd feeding)Resin DegassingVent RecoverySeed Bed SystemResin Additive HandlingPelleting1.1.1 PE 工艺单元 PE 工艺单元采用 Univation 技术公司的 UNIPOL 聚乙烯技术，这是一种低压气相聚合工艺，包括下列工艺系统： -原料供给和精制 -乙烯精制 -反应 （包括催化剂处理和进料） -树脂脱气 -排放气回收 -种子床系统 -树脂添加剂处理 -造粒1.1.2Supporting FacilitiesThe Supporting Facilities for the PE Process Uni
6、t include the following process systems:Resin Handling System1.1.2 配套设施 PE 工艺单元的配套设施包括下列系统： -树脂处理系统1.1.3Auxiliary FacilitiesThe Auxiliary Facilities for the PE Process Unit include the following process systems:Steam and Condensate Recovery SystemFlare SystemsWaste Water Collection and Pretreatment
7、SystemUtility Distribution System1.1.3 辅助设施 PE 工艺单元的工艺辅助设施包括下列系统： -蒸汽和冷凝水回收系统 -火炬系统 -废水收集和预处理系统 -公用工程配送系统1.2Process IntroductionThe design of the PE Process Unit will incorporate the latest UNIPOL PE Process Know-how.1.2 工艺介绍 山西焦化聚乙烯装置的设计将采用最新的UNIPOL PE 工艺技术。 1.2.1Description of the PE Process UnitT
8、he PE Process Unit comprises a number of process systems, which are described in detail in the following sections:Raw Material Supply and Purification (Part 1)Ethylene Purification (Part 2)Reaction (Part 4)Resin Degassing (Part 5A)Vent Recovery (Part 5B)Seed Bed System (Part 5E)Resin Additive Handli
9、ng (Part 6)Pelleting (Part 7)Process Flow Diagrams (PFDs) that represent these process systems are provided in Attachment 12 of this appendix.All of the equipment described in the following process description is included in the preliminary equipment list provided in Appendix 5.1.2.1 PE 工艺单元描述 PE 工艺
10、单元由一系列工艺系统组成，下面对这些系统进行详细描述： 原料的供应和精制 （第1 部分） 乙烯的精制 （第2 部分） 反应 （第4 部分） 树脂脱气 （第5A 部分） 排放气回收 （第5B 部分） 种子床系统 （第5E 部分） 树脂添加剂处理 （第6 部分） 造粒 （第7 部分） 工艺流程图 （PFD）附于本附件的附录1-2。 下面工艺描述中涉及的所有设备见附件5 中的初步工艺设备清单。 Raw Material Supply and Purification (Part 1)Nitrogen and hydrogen are delivered to the Contract Plant B
11、attery Limits by pipeline.Comonomers, butene1 and hexene1, and Induced Condensing Agent (ICA), isopentane, are supplied to the Contract Plant by pipeline. It has been assumed that sufficient storage capacity is available from the Outside Battery Limits (OSBL) for butene1, hexene1, and ICA.Cocatalyst
12、 alkyl is received in shipping containers for use directly in the PE Process Unit.Comonomer PurificationA common purification system is provided for the two comonomers - butene1 and hexene1. Liquid comonomer from the Battery Limits is fed directly into the Comonomer Degassing Column (C1008). The col
13、umn, which is mounted on the Comonomer Surge Tank (C1007), is equipped with water cooled Comonomer Condenser (E1009) and steam heated Comonomer Reboiler (E1010). A small stream of overhead gas, containing stripped light gas contaminants vents to the flare. The bottom product from the Comonomer Surge
14、 Tank passes through Comonomer Cooler (E1011). The coolers primary purpose is to provide adequate NPSH for the Comonomer Charge Pump (G1002 or G1003, an installed spare). The Comonomer Charge Pump boosts the comonomer pressure to approximately 2,861 kPag (415 psig) for flow into the Reactor. From the Comonomer Charge Pump, comonomer flows through the Comonomer Dryer (C1004 or
