The utility model discloses a HPH furnace flue gas waste heat recovery system, including the original flue and chimney flue, the original end of the bell type annealing furnace exhaust port, and the other end is communicated with a chimney, also includes a bypass flue, evaporator, economizer, fan, boiler drum, the original row gate valve installed on the flue, the original flue in parallel on both sides of the gate valve bypass flue, a bypass flue are connected in series on the evaporator, economizer and fan bypass flue in the evaporator is arranged in front of the gas valve, the fan is mounted on the rear of the cut-off valve, the evaporator inlet is communicated with the boiler through the drop tube the water outlet communicated with the boiler through the ascending pipe, economizer inlet and boiler water supply pipe, the water outlet is communicated with the water outlet pipe and boiler drum. The utility model not only saves gas, but also recycles the waste heat of the flue gas, realizes the energy saving and emission reduction of the enterprise, is favorable for the environmental protection, reduces the operation cost of the enterprise, and achieves good economic and social benefits.
【技术实现步骤摘要】
本技术属于烟气余热回收领域,特别是涉及一种全氢罩式退火炉烟气余热回收利用系统。
技术介绍
目前市场上对金属材料特别是线材、冷轧带钢等进行退火处理,一般采用全氢罩式退火炉进行处理,加热装置有电加热、煤制气(煤气发生炉)、焦炉煤气或混合煤气(钢铁企业)、天然气或液化气等。因电加热成本高,故现新型加热装置基本采用燃气装置,同时实现智能控制,即实现对炉温与炉压精准控制、空气与燃气能进行比例调节等。由于实现了1台或多组炉同时达到自控和手控的要求,产能大,且控温精度高、燃烧充分、整个系统安全可靠,大部分装置还利用余热对助燃空气进行了预热,热量利用效率大幅度提高。尽管如此,罩式炉的排烟温度仍很高,达到300—500℃,高温烟气一般采用烟囱自拔直接排放,有的系统考虑多组炉并联运行的安全可靠性,采用风机强排,高温烟气进风机前配部分冷空气,致使这部分热量白白浪费。而在材料退火前,一般的材料都要进行酸洗、清洗、烘干等处理,这些过程均需采用蒸汽或热水进行加热处理,这些蒸汽和热 ...
【技术保护点】
一种全氢罩式退火炉烟气余热回收利用系统,包括原排烟道、烟囱,原排烟道一端与罩式退火炉排烟口连接,另一端与烟囱相通,其特征在于:还包括旁路烟道、蒸发器、省煤器、风机、锅炉汽包,原排烟道上安装闸板阀,原排烟道上在闸板阀的两侧并联旁路烟道,旁路烟道上依次串联蒸发器、省煤器和风机,旁路烟道上在蒸发器的前方安装烟气调节阀,在风机的后方安装截止阀,蒸发器的进水口通过下降管与锅炉汽包连通,出水口通过上升管与锅炉汽包连通,省煤器的进水口与锅炉给水管连接,出水口通过出水管与锅炉汽包连通。
【技术特征摘要】
1.一种全氢罩式退火炉烟气余热回收利用系统,包括原排烟道、烟囱,原排烟道一端
与罩式退火炉排烟口连接,另一端与烟囱相通,其特征在于:还包括旁路烟道、蒸发器、省
煤器、风机、锅炉汽包,原排烟道上安装闸板阀,原排烟道上在闸板阀的两侧并联旁路烟道,
旁路烟道上依次串联蒸发器、省煤器和风机,旁路烟道上在蒸发器的前方安装烟气调节阀,
在风机的后方安装截止阀,蒸发器的进水口通过下降管与锅炉汽包连通,出水口通过上升管
与锅炉汽包连通,省煤器...
【专利技术属性】
技术研发人员:朱政,王红莲,董联革,
申请(专利权)人:天津诺能达能源科技有限公司,
类型:新型
国别省市:天津;12
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