毕业设计（论文）-城市天然气配气站工艺设计设计计算书.doc

摘要
天然气作为一种优质能源,在全球范围内得到普遍发展,它清洁、经济、方便、用途广泛。天然气长输管线、城市配气系统应运而生。而城市配气系统又是从配气站开始的,天然气在配气站内经过除尘、调压、计量、添味后,然后通过各级配气管网和气体调压装置保质保量地根据用户要求直接地向用户供气。本文通过确定配气站的流程,根据已知条件进行设备计算及选型等完成配气站的工艺设计。
本设计的流程为中低压天然气从分别经调压分离后进入1号汇管,再经过调压后进入2号汇管,从2号汇管出来的气体要流经三条管线,其中两条是供给用户的,在这两条管道上均安装有流量计,剩下的一条经调压后进入3号汇管,从3号汇管出来的气体会流经四条管道提供给四个用户,在这四条管道上均安装有流量计。
在设备选型方面,分别对管线,汇管,阀门(闸阀、调压阀、安全阀等),分离器,流量计等进行计算并选型,对添味装置以及仪表如压力表,温度计进行比较选型。
关键词:天然气;配气站;工艺流程;工艺设备
Abstract
As a kind of high quality energy resources, nature gas is generally developed worldwide because it is sanitary, economic, convenient and wide use. Then nature gas long haul pipeline, city distribution system is emerging as the times require. City distribution system is begin from distribution substation, nature gas flows through dust exhauster, dump valve, flowmeter odorizer and then through all levels of work directly to the consumer according to the requirement. The paper finished the substation technological design by site arrangement, flow chart and based on the equipment calculate and selection.
The flow chart are given as follows: low and medium pressure nature gas respectively flows through the pressure control valve to the 1# gathering pipe, then to the 2# gathering pipe after pressure controlling, gas flowing out of the 2# divides into three parts, two of them flow towards consumers after measuring; one flows to the 3# gathering pipe after pressure controlling. Gas out of the 3# divides into four parts, and flows through the flowmeters towards consumers.
The aspect of apparatus selection, the following should be calculated and then selected: pipeline, gathering pipe, valve (. brake valve, pressure control valve, and relief valve), extractor, flowmeter; the odorizer, appliance as pressure gauge, temperature gauge should pared and selected.
Key word:Nature gas;Distribution substation;Technologic facility;
Technologic apparatus
目录
1 绪论 1
设计目的及意义 1
国内外现状及发展趋势 1
2 设计说明书 3
设计已知参数及设计内容 3
配气站已知参数 3
设计