The invention discloses a condensate treatment process for a waste gas pipeline before a primary cooler. The inlet end of the waste gas main pipe in front of the primary cooler is inclined downward to communicate with the gas outlet of the gas-liquid separator, and the end of the waste gas main pipe in front of the primary cooler is vertically and downward arranged with a liquid collecting port. The liquid collecting port is connected with the discharge condensate pipe, and the end of the condensate pipe is connected with the coke. The oil ammonia water pipeline or the tar ammonia separation device are connected. Compared with the prior art, the invention avoids the increase of the low temperature water consumption caused by the high temperature condensate of the waste gas pipeline before the primary cooler being connected with the circulating spraying liquid system of the lower section of the primary cooler, the increase of the heat exchange area of the low temperature section of the primary cooler, the blockage of the equipment pipeline of the circulating spraying liquid system in the lower section, and the blockage of the waste gas pipeline and the discharge pipe before the primary cooler. The plug reduces the equipment investment of the primary cooler, ensures the smooth discharge of condensate from the waste gas pipeline, reduces the amount of dust entrained into the primary cooler by the waste gas, and improves the cooling effect of the waste gas in the primary cooler.
【技术实现步骤摘要】
一种初冷器前荒煤气管道冷凝液处理工艺
本专利技术涉及焦化行业技术升级及节能环保
,特别是一种初冷器前荒煤气管道冷凝液处理工艺。
技术介绍
在回收净化炼焦煤气过程中,从焦炉炭化室经上升管逸出的荒煤气首先经桥管进入集气管,被焦油氨水分离装置送来的循环氨水冷却至80~84℃。集气管出口的荒煤气和焦油氨水混合物经气液分离器后,焦油氨水混合物去焦油氨水分离装置;荒煤气进入初冷器继续冷却至20~22℃。气液分离器后的荒煤气不同程度地夹带有煤粉、焦油及萘等杂质;初冷器前高温荒煤气管道不保温,在与环境换热过程中,荒煤气中饱和水冷凝下来形成高温冷凝液,冷凝液温度接近荒煤气温度80~84℃;部分煤粉、焦油及萘等杂质也一并进入冷凝液。初冷器普遍采用横管间接初冷器,用工业循环水和低温水对荒煤气进行分段冷却。对需要回收荒煤气余热产生高温余热水的用户,初冷器可采用上段、中段、下段三段结构,上段用余热水冷却。初冷器循环水段和低温水段之间设置断塔盘。为强化初冷器的换热效率、提高初冷器的脱萘效率,余热水段、循环水段用焦油氨水分离装置送来的焦油氨水乳化液进行喷洒,喷洒液及煤气冷凝液经断塔盘自流至焦油氨水分离装置;下段低温水段用下段循环喷洒液泵送来的循环喷洒液连续喷洒,煤气冷凝液与喷洒液经初冷器底部自流至下段的喷洒液槽,再经下段循环喷洒液泵送至初冷器低温水段的顶部循环喷洒;多余冷凝液由循环喷洒液泵后送至焦油氨水分离装置;循环喷洒液的温度在18~21℃左右。目前初冷器前荒煤气高温冷凝液普遍接入初冷器下段喷洒液槽液封,冷凝液中的煤粉、粉尘及焦油渣等杂质也一并接入了下段循环喷洒液系统。高温冷凝 ...
【技术保护点】
1.一种初冷器前荒煤气管道冷凝液处理工艺,包括气液分离器(2)的进口连通的煤气管道(7),气液分离器(2)的气体出口连接初冷器前荒煤气总管(8),初冷器前荒煤气总管(8)通过初冷气前荒煤气分管(9)与横管式初冷器(1)顶端连通,气液分离器(2)液体出口通过焦油氨水管道(13)与焦油氨水分离装置(3)入口连通;横管式初冷器(1)下段的循环喷洒管通过下段循环喷洒液泵(6)与下段循环喷洒液槽(5)连通,横管式初冷器(1)的中段与焦油氨水分离装置(3)入口连通,下段循环喷洒液泵(6)的出液口也与焦油氨水分离装置(3)入口连通,横管式初冷器(1)的下段设有煤气出口(17),横管式初冷器(1)底部与液封槽(4)连通,液封槽(4)上部与下段循环喷洒液槽(5)连通,其特征在于:将初冷器前荒煤气总管(8)的入口端向下倾斜与气液分离器(2)的气体出口连通,初冷气前荒煤气分管(9)末端向下倾斜与初冷器前荒煤气总管(8)同心或顶平连接,所述初冷器前荒煤气总管(8)末端竖直向下设置集液口,集液口连接排冷凝液管(10),所述排冷凝液管(10)的末端与焦油氨水管道(13)或焦油氨水分离装置(3)连通。
【技术特征摘要】
1.一种初冷器前荒煤气管道冷凝液处理工艺,包括气液分离器(2)的进口连通的煤气管道(7),气液分离器(2)的气体出口连接初冷器前荒煤气总管(8),初冷器前荒煤气总管(8)通过初冷气前荒煤气分管(9)与横管式初冷器(1)顶端连通,气液分离器(2)液体出口通过焦油氨水管道(13)与焦油氨水分离装置(3)入口连通;横管式初冷器(1)下段的循环喷洒管通过下段循环喷洒液泵(6)与下段循环喷洒液槽(5)连通,横管式初冷器(1)的中段与焦油氨水分离装置(3)入口连通,下段循环喷洒液泵(6)的出液口也与焦油氨水分离装置(3)入口连通,横管式初冷器(1)的下段设有煤气出口(17),横管式初冷器(1)底部与液封槽(4)连通,液封槽(4)上部与下段循环喷洒液槽(5)连通,其特征在于:将...
【专利技术属性】
技术研发人员:陈文,胡小建,周建波,崔小莹,
申请(专利权)人:长沙医学院,
类型:发明
国别省市:湖南,43
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