荒煤气性质研究与余热综合利用

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lot of heat waste,but also situation and
environmental pollution.Faced with increasingly
chemical
environmental
the
ቤተ መጻሕፍቲ ባይዱ
urgent
important.How
to recovery the waste heat
The composition of Coke-Oven Raw Gas is very complex,mainly consists of clean gas,water vapor,tar,crude benzene
and
other components.The Primary Cooling of Coke—Oven Raw Gas
thus recycled water consumption is large and large area of Primary Cooler.It’S very
to
difficult
recovery the waste Heat of Coke-Oven Raw Gas,because it composition is very complicate
quickly dropped to 80-90℃,most oftar from Coke・Oven Raw Gas aqueous
70-80℃circulating
ammonia spraying high temperature waste gas makes the temperature of Coke—Oven Raw Gas impurities into circulation
coke at high temperature.Although now there are
a variety
and tend to
ofraw gas heat recovery
techniques,but it has not been effective application due to the low recovery stability.
method,and we aise temperature,medium
use
temperature,low-temperature
shortage of gas utilization.
heat cascade recycling programs,and
or
direct
or
indirect
quench,and lithium bromide refrigeration
combining with
the
production process of low temperature heat sink,we put forward for the actual working
.II.
大连理工大学专业学位硕士学位论文
conditions of shortage of gas heat cascade recycling,utilization program.Imitating from pyrolysis ofhydrocarbons ofpetrochemical system,catalytic cracking,delayed coking process in high temperature oil gas heat recovery
efficiency and poor
Firstily,This
paper discusses the basic properties of Coke—Oven Raw Gas,the gas dew coking characteristics at
point corrosion and
hi曲temperature,then
heat pump technology to achieve low calorie
Key
Words:Coke-Oven
Raw
Gas;Waste Heat;Quench;lithium
bromide absorbtion
refrigeration;AHT
.III.
荒煤气性质研究与余热综合利用


初冷器体积庞大。
由于荒煤气的成分很复杂,且高温下易结焦,从而使荒煤气余热回收的难度很大。 虽然现阶段已有各种荒煤气余热回收的技术和方法,但均因回收效率低、稳定性差等问 题,而未能得到有效的推广应用。 本文研究了荒煤气的基本性质,考察了高温下荒煤气露点腐蚀和高温结焦特性,并 结合化产工段低温热阱,提出了适合实际工况的荒煤气余热梯级回收,综合利用方案。 通过借鉴石油石化系统中烃类热裂解、催化裂化、延迟焦化等工艺中的高温油气热量回 收方法,提出荒煤气高温、中温、低温段热量梯级回收方案,通过直接急冷或间接急冷, 以及利用溴化锂制冷机热泵技术,实现荒煤气低温热量的综合利用。 关键词:荒煤气;余热;急冷;溴化锂吸收式制冷;AHT

production,Waste heat recovery is particularly and reduce the production of comprehensive energy
on
consumption,has economy progress.
far-reaching impact
1.1.1荒煤气组成……………………………………………………………3 1.1.2荒煤气露点……………………………………………………………4 1.1.3荒煤气结焦问题………………………………………………………4
1.2焦化化产工段热源分布………………………………………………………4
1.2.1荒煤气初步冷却………………………………………………………4 1.2.2蒸氨工段………………………………………………………………6
uses
vaporization of ammonia.Subsequent indirect cooling process Coke—Oven Raw Gas to
recycled water to cool
20-23。C.The
heat which token away by the recycled water is made by

要……………………………………………………………………………………………………………一I
Abstract………………………………………………………………………………………………………….....II


言………………………………………………………………………………………………一1 文献综述……………………………………………………………………………..3 1.1荒煤气组成及性质……………………………………………………………3
lot of heat waste.It is the backwardness of process and yield,the rough mode of
production
causes
and Equipment
need for fme
characteristics mat not only
causes severe
专业学位硕士学位论文
荒煤气性质研究与余热综合利用
The Properties Study of Coke-Oven Raw and
nIlZanon Comorehensive omoU til娩ation
Waste Heat

号:
j12Q邳旦
呈Q!垒二墨二!璺
完成日期:
大连理工大学
Dalian University of Technology
大连理工大学学位论文独创性声明
作者郑重声明:所呈交的学位论文,是本人在导师的指导下进行研究 工作所取得的成果。尽我所知,除文中已经注明引用内容和致谢的地方外, 本论文不包含其他个人或集体已经发表的研究成果,也不包含其他已申请 学位或其他用途使用过的成果。与我一同工作的同志对本研究所做的贡献 均已在论文中做了明确的说明并表示了谢意。
the development of enterprises and na-tional
The temperature of Coke-Oven Raw Gas from the carbonization chamber is In term ofheat ofCoke
oven
650~750℃,
products,Coke—Oven Raw Gas’Sensible heat makes up 36 percent.
finish Coke-Oven Raw cooling and preliminary purification process.But

ammonia,and
the heat of hi【gh temperature is Serious devaluated into
low—temperature latent heat of
学位论文题目:
蕴!!蜷至!麦盈弱墨主盆缝短垒塑!单
作者签名:一蓬曛】约鞋.一一日期:兰生年—左月—丛日
大连理工大学专业学位硕士学位论文


炼焦工业是钢铁工业的耗能大户,存在许多余热浪费现象。落后的生产技术,粗犷 的生产方式以及设备特点,不仅造成大量余热浪费,而且引起了环境污染。面对日益严 峻的环境形势及精细化生产的迫切需要,余热回收显得格外重要。如何实现余热回收, 降低生产综合能耗,对企业的发展和国民经济的进步影响深远。 从焦炉炭化室逸出的荒煤气温度为650,、-,750℃,就焦炉产物带出的热量而言,荒煤 气显热占36%左右。荒煤气的成分很复杂,主要由净煤气、水蒸气、焦油、粗苯等组成, 荒煤气冷却是后续荒煤气净化得到净煤气的基础。传统的荒煤气急冷采用了先直接急冷 后间接冷却工艺。直接急冷采用70~80℃循环氨水喷淋高温荒煤气,使荒煤气的温度瞬 间降至80--90℃,荒煤气中的大部分焦油杂质进入循环氨水中,实现了荒煤气的冷却和 初步除杂过程,但荒煤气中蕴含的高温热量贬值严重,大部分的高温热量用于汽化循环 氨水,变成了低温的氨水汽化潜热。后续的间接冷却过程采用循环水带走荒煤气中的热 量,使荒煤气降至20N23"C。循环水带走的热量不仅包括急冷过程中产生的氨与水蒸汽 的潜热,而且包括荒煤气急冷过程中自身重组分冷凝潜热及显热,因此循环水耗量很大,
荒煤气性质研究与余热综合利用
The Properties Study of Coke-Oven Raw and Waste Heat Comprehensive Utilization
Abstract
Coking Industry is exists


large energy consumption of Iron and Steel Industry,where there
1.2.3脱硫工段………………………………………………………………6
1.2.4脱苯工段………………………………………………………………7 1.3现有荒煤气余热回收技术……………………………………………………7 1.3.1上升管汽化冷却技术…………………………………………………7 1.3.2导热油夹套技术………………………………………………………8 1.3-3热管式换热技术………………………………………………………8 1.3.4余热锅炉换热技术……………………………………………………9 1.3.5氮气换热技术………………………………………………………..1 0
uses
is the foundation ofgas subsequent purification.The traditional raw gas quenching
indirect
cooling after the first direct quenching process.Direct quenching using
both quench the heat generated in the process of latent heat of ammonia and water vapor and latent heat of condensation and the sensible heat of Coke-Oven Raw Gas when its quenched.
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