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50t/h燃烧高焦炉混合煤气环形加热炉设计

摘要：

环形加热炉是借炉底的旋转，使放置在炉底上的坯料由装料口移到出料口的一种炉型。炉子用侧进料侧出料的方式，并且用侧烧嘴加热。本设计主要针对中径15米环形加热炉尺寸、燃料和排烟系统进行设计，具体包括燃料燃烧计算、钢坯加热时间计算、炉子基本尺寸的确定、热平衡计算及燃料消耗量的确定，排烟系统计算。炉子分为三段式，预热段为一段，加热段为一段，均热段为一段。

本设计采用高焦炉混合煤气作为环形加热炉的主要燃料。本设计中环形加热炉的排烟方式采用机械排烟。由于炉子排烟系统阻力较大，故采用排烟机直接排烟的形式进行排烟。在排烟系统设计中，主要进行了烟道阻力的计算、烟囱的计算、炉膛内阻力的计算、掺冷风机的选取以及排烟机的选取等工作。

本组设计是在6个人共同合作下完成的。 关键词：环形加热炉、热平衡、排烟系统。

Abstract

The design of the main diameter of 15 meters rotary hearth furnace，fuel and exhaust system design， including fuel combustion，the billet heating time，the furnace to determine the basic size，the heat balance calculation and the determination of fuel consumption，smoke extraction system calculation. Stove is divided into three parts, and warm for a period of heating period, for a long, hot for a period of time.

Rotary hearth furnace using natural coke oven gas as main fuel。Rotary hearth furnace of this design approach of mechanical smoke exhaust. Stove smoke extraction system as a result of greater resistance， so the use of direct smoke smoke smoke form. Smoke extraction system in the design， the main resistance to the flue， the chimney of the calculation， the calculation of the resistance furnace， cooler-doped smoke machine selection and the selection and so on.

This group is designed to work together in the 6 to complete. Key words: annular furnace，Thermal, smoke extraction system.

目录

50t/h燃烧高焦炉混合煤气环形加热炉设计 ························································ I 摘要： ······················································································································ I Abstract ···················································································································· I 第一部分：设计说明部分 ····················································································· 1 第一章 设计目的及基本条件 ············································································· 1

1.1 加热炉炉型的选择 ········································································································ 1 1.2 设计的主要内容 ············································································································ 1 1.3 基本设计条件 ················································································································ 2 1.4 炉型特点与节能措施 ···································································································· 3

第二章 工艺流程简介 ··························································································· 8 第三章 环形炉主要技术参数 ············································································· 9

3.1 炉子主要尺寸 ················································································································ 9 3.2 炉子主要技术参数 ········································································································ 9 3.3 燃料条件 ······················································································································ 10 3.4 其它公用介质 ·············································································································· 10

第四章 环形炉本体工艺与结构说明 ······························································· 11

4.1 炉体钢结构 ·················································································································· 11 4.2 炉门及窥视孔 ·············································································································· 12 4.3 排渣系统 ······················································································································ 13 4.4 三道隔墙设计 ·············································································································· 14 4.5 砌筑材料 ······················································································································ 15

第五章 排烟系统 ······························································································· 17

5.1 机械排烟 ······················································································································ 17 5.2 烟道 ······························································································································ 18 5.3 金属烟囱 ······················································································································ 21 5.4 掺冷风系统 ·················································································································· 22 5.5 排烟机 ·························································································································· 23

第六章 炉子供热及燃烧系统 ··········································································· 24

6.1 供热及燃烧控制 ·········································································································· 24 6.2 助燃空气系统 ·············································································································· 24 6.3 煤气及氮气管路系统 ·································································································· 25

第二部分 设计计算部分 ··················································································· 26 第七章 环形加热炉尺寸、燃料部分设计计算 ··············································· 26

7.1燃料燃烧计算 ················································································································· 26 7.2钢坯加热时间的计算 ····································································································· 28 7.3炉子基本尺寸的确定 ····································································································· 43 7.4热平衡计算及燃料消耗量的确定 ················································································· 48

第八章 排烟系统设计计算 ··············································································· 58

8.1换热器烟气温度的确定 ································································································· 58 8.2烟道的设计 ····················································································································· 60 8.3烟囱的设计 ····················································································································· 64