60万ta煤制甲醇项目co变换工段初步设计毕业设计 下载本文

摘 要

本设计是年产60万吨煤制甲醇项目一氧化碳变换工段的初步设计。它的主要任务是调整C/H比,以满足后续的合成需求。本设计以非饱和塔型全低温耐硫不完全变换为基础,采用钴钼系催化剂对来自煤直接气化的粗煤气进行CO变换。

设计的原则是技术先进、工艺成熟、经济合理、安全环保,在充分论证国内外各种先进生产方法、工艺流程和设备配置基础上,选用煤气化来的粗煤气进行CO变换,设计的内容包括生产工艺设计论证、工艺计算、设备设计选型及流程图、平面布置图、设备图的绘制;此外,在设计中充分考虑环境保护和劳动安全等非工艺部分。最后通过经济评估,本设计能够达到要求的经济效益。

关键词:煤制甲醇 CO 变换 碳氢比

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Abstract

This design is the annual output of 60 million tons of coal methanol carbon monoxide shift conversion section of the preliminary design. Its main task is to adjust the C / H ratio, the synthesis of the follow-up to meet demand. The design process for the work of all non-saturated low-temperature sulfur-tolerant tower is not completely transformed into discussion, the use of cobalt-molybdenum catalysts Gasification of coal directly from coal gas for CO conversion.

Design principles are technologically advanced, mature technology, economical, safe environment, fully demonstrated at home and abroad in a variety of advanced production methods, process and device configuration based on the use of coal gasification to transform the crude gas to CO, the design includes production process design argument, process calculation, equipment selection and design of flow charts, floor plans, equipment, mapping; In addition, full consideration in the design of environmental protection and labor safety and other non-process part. Finally, economic evaluation, designed to meet the requirements of the economic benefits.

Keywords: coal to methanol carbon monoxide transform ratio of carbon and

hydrogen

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目 录

摘 要 ............................................................................................................................................................ I Abstract .................................................................................................................................................... II 第1章 总 论 ......................................................................................................................................... 1

1.1 概述 .......................................................................................................................................... 1

1.1.1 煤制甲醇的可行性 ................................................................................................... 1 1.1.2 设计的目的和意义 ................................................................................................... 1 1.1.3 变换气的要求 ............................................................................................................ 2 1.2 工艺比较 ................................................................................................................................. 3

1.2.1 全低变工艺 ................................................................................................................. 3 1.2.2 无饱和塔型变换工艺 ............................................................................................... 7 1.2.3 Shell粉煤气化制甲醇一氧化碳变换工艺 ....................................................... 9 1.2.4 变换兼COS水解工艺 .......................................................................................... 10 1.2.5 变换兼硫化物加氢工艺 ........................................................................................ 11 1.2.6 小结 ............................................................................................................................. 12 1.3 设计范围、装置组成及建设规模 .................................................................................. 12

1.3.1 设计的范围 ............................................................................................................... 12 1.3.2 生产装置组成 .......................................................................................................... 13 1.3.3 建设规模 ................................................................................................................... 13

第2章 工艺详述 ................................................................................................................................ 14

2.1 一氧化碳变换系统流程 .................................................................................................... 14 2.2 一氧化碳变换系统影响因素 ........................................................................................... 15

2.2.1 压力 ............................................................................................................................ 15 2.2.2 温度 ............................................................................................................................ 16 2.2.3 水汽比 ........................................................................................................................ 16 2.2.4 空速 ............................................................................................................................ 17 2.2.5 CO2的影响 ............................................................................................................... 17 2.2.6 副反应的影响 .......................................................................................................... 17 2.2.7 入口温度 ................................................................................................................... 18

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