共查询到18条相似文献,搜索用时 156 毫秒
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针对攀钢初冷器使用寿命短、换热管堵塞、煤气集合温度高的问题,分析了换热管施工技术、高压氨水压力、混合液喷洒量对初冷器的影响,采取改进初冷器结构及焊接工艺和混合液喷洒系统改造,可解决初冷器换热管堵塞及寿命短的问题。 相似文献
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为使用两段式横管初冷器提取煤气中低品位热,济钢集团国际工程技术有限公司使用换热段分割的方案,通过对换热管的封堵和对封头的改造,将原来的换热段进行重新分割确定高温段、中段和低温段,将两段式初冷器改造为三段式初冷器。改造后,实现了煤气中低品位热的余热回收。经测算4.02 a可全部收回投资。 相似文献
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本文提出了焦化厂煤气初冷工艺在实际操作中存在的诸多问题,并着重于初冷器的新、旧两系统在煤气的平衡、初冷水回水工艺的改进、初冷器清扫及正常维护操作方面,提出了一些工艺改进措施和最优化的操作方法,以克服新、旧两个煤气初冷器系统在运行中,特别是旧系统初冷器内部横管挂萘严重的现象,优化了操作工艺和操作制度。 相似文献
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二期煤气冷却选用横管式初冷器,冷却效果较好,但要求有足够的冷凝液喷洒量,充分清洗管束外壁,才能保持较好的冷却效果。由于设计上的缺陷,冷凝液喷洒量偏小,初冷器堵塞,无法正常生产,故进行改造,并提出新工艺流程供设计选用。 相似文献
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GWNT喷雾冷却塔在焦化循环水应用与实践 总被引:1,自引:0,他引:1
1前言济南钢铁股份公司焦化厂(简称济钢焦化厂)于1969年12月份投产,现有4座42孔JN43-80型焦炉,1座65孔JN43-80型焦炉,2座60孔JN60-3型焦炉,年产焦碳270万t,配套的化产回收硫氨和脱硫工艺、焦油加工、粗苯精制及干法熄焦等工艺。济钢焦化厂循环水系统分中温水系和低温水系,中温水系出水28 ̄32℃,回水40 ̄43℃,循环量8 500 m3/h,主要用于焦炉煤气初冷器一段,煤气终冷器、蒸氨、焦油、粗苯和精苯工艺等,靠凉水塔蒸发冷却降温。低温循环水系出水16 ̄180℃,回水23 ̄25℃,循环水量2 900 m3/h,主要用于煤气初冷器二段,煤气终冷器、洗苯和粗苯、… 相似文献
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对焦炉煤气初冷工艺中冷却效果差、阻力偏高等问题的原因进行了分析,通过控制中段循环水温度,增加中、下段喷洒液中轻质焦油含量,以及提高其喷洒液量和喷洒密度等措施,有效地解决了上述问题,保证了初冷器的长期稳定运行。 相似文献
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分析了煤气冷凝鼓风系统横管初冷器生产现状和煤气净化过程中所需冷却水供给情况,结合热源和用冷需求情况,对初冷器进行适当改造,将初冷器上段高温循环水作为溴化锂吸收式热水型制冷机组热源,回收生产余热,实现能源的二次开发和利用,具有较好的经济效益和社会环保效益。 相似文献
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国内烧结余热发电大多为纯余热发电技术,仅仅回收环冷机前两段的废气显热.为了深化余热利用程度,增加余热回收总量,提高系统效率,通过补燃厂区内可调节的高炉煤气,可回收环冷机前三段余热进行发电. 相似文献
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《Baosteel Technical Research》2010,(Z1):133
Environmental requirements world wide and in the P.R.of China in particular have increased and authorities are increasing the pressure on steelmakers to comply with always more stringent limits and standards. Modern converter steel making goes along with the innovation and new developments not only for the primary converter process itself but even more for the dedusting technologies.This paper describes the benefits and latest development of advanced off gas cleaning and recovery systems based on dry type cleaning with electrostatic precipitation and wet type gas cleaning based on wet scrubbers.Modern converter dedusting is based on suppressed combustion systems in order to reduce off gas amounts and to be able to use the gas for gas recovery.The dry type primary off gas treatment system based on electrostatic precipitator technology is the most advanced environmental solution available for converter steel making.Dry dedusting has been introduced in China successfully with a significant contribution by Siemens VAI being the market leader for converter dry dedusting systems.Siemens VAI has introduced several design improvements over the last years such as CFD modeling of flow conditions in evaporation cooler,design of chains for dust conveyors,design of ESP inlet,design and thickness of discharge electrodes and operation in energy saving mode.Additionally the DDS process has been successfully implemented in China for the De-P process.The gas recovery system for DDS has been optimized over the years with high quality equipment and integrated automation and control systems.Wet type dedusting for converter gas is a well proven technology for many years and is still widely used due to the simplicity of the process and the lower investment costs.SVAI has continuously improved it’s wet dedusting technologies to provide highly energy efficient systems which can achieve lowest levels of clean gas dust while still maintaining a moderate water and energy consumption with simplified process control and standardized process control packages.Main design and process improvements include expansion joints for connection of scrubber to cooling stack,new type of droplet separator,advanced hood pressure control package,ID fan washing system,ID fan speed control system etc.The focus for wet type gas recovery systems is still on maximum safety and reliability.SVAI has also successfully improved the technological packages for converter gas recovery for wet type dedusting systems.The comparison between the two system shows the advantages of dry dedusting mainly being the lowest clean gas dust content, lower operating costs,easier handling for recycling of residuals and no need for a water treatment plants.Wet type dedusting has it’s main advantages in the simple process and operation of the system,the flexible layout solutions inside the steel shop as well as generally lower investment costs.An overview on the numerous reference installations for dry- and wet type dedusting systems in China as well as world wide is given. 相似文献
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提高烧结余热回收的生产实践 总被引:1,自引:0,他引:1
针对烧结低温废气余热回收效率低,以及烧结余热回收设备能力未完全释放的问题,唐钢对烧结机机尾废气温度控制系统和环冷机烟气循环系统进行了优化。结果表明,在实施精细管理的基础上,通过应用BRP控制模型、投入环冷与烧结机联调控制等系列措施,解决了上述问题,并实现了吨矿余热回收发电量增加13%的目标。 相似文献