CN101451173A - 一种转炉煤气干法袋式净化回收工艺及系统 - Google Patents
一种转炉煤气干法袋式净化回收工艺及系统 Download PDFInfo
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- CN101451173A CN101451173A CNA2007100930689A CN200710093068A CN101451173A CN 101451173 A CN101451173 A CN 101451173A CN A2007100930689 A CNA2007100930689 A CN A2007100930689A CN 200710093068 A CN200710093068 A CN 200710093068A CN 101451173 A CN101451173 A CN 101451173A
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- gas
- purification
- recovery
- temperature
- converter
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- 239000007789 gases Substances 0.000 title claims abstract description 56
- 238000000746 purification Methods 0.000 title claims abstract description 41
- 238000000034 methods Methods 0.000 title claims description 14
- 239000011901 water Substances 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 10
- 239000007924 injections Substances 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 239000001308 nitrogen Substances 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 5
- 239000001301 oxygen Substances 0.000 claims abstract description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003034 coal gas Substances 0.000 claims description 51
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- 239000007921 sprays Substances 0.000 claims description 8
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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[O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
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- 229910000831 Steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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- 230000015556 catabolic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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Abstract
本发明属于气体净化类技术领域，公开了一种转炉煤气干法袋式净化回收工艺及系统。转炉在吹氧冶炼时产生高温含尘烟气，经汽化冷却系统降温至800～1000℃，含尘煤气通过膨胀节进入蒸发冷却器，被蒸汽或氮气和水组成的双相喷射装置雾化冷却，煤气温度降至200℃左右，然后煤气进入袋式除尘器进行过滤净化，净化后的煤气根据系统煤气回收条件由三通切换阀进行切换控制，分别进行煤气回收或放散。本发明的优点是煤气净化效率高，系统运行阻力和能耗低，系统没有污水等二次污染，系统运行维护费用低。该技术是一种具有广泛推广价值的节能环保的新技术，可广泛应用在转炉煤气净化回收系统上。
Description
一种转炉煤气干法袋式净化回收工艺及系统
技术领域
本发明属于气体净化类技术领域，本发明涉及钢铁工业转炉炼钢生 产过程中产生的煤气净化，公开了一种转炉煤气净化及回收的工艺及系 统，特别涉及一种转炉煤气干法袋式净化回收工艺及系统。 背景技术
转炉煤气在转炉炉口的温度为1450〜1650°C,经汽化冷却系统冷却至 800〜100(TC后进入净化及回收系统。目前转炉煤气净化及回收工艺主要有 湿法和干法（简称LT)两种。湿法工艺又主要有二文一塔（简称OG)和环 缝洗涤（简称RSW)两种。
湿法OG净化系统主要由二级文氏管净化装置和脱水装置组成。一级文 氏管一般采用溢流定径文氏管（简称一文），起到对转炉煤气降温和粗除尘 的作用；二级文氏管一般采用RD翻板式自动调径文氏管，起到对煤气精除 尘的作用。脱水装置用作二级文氏管后脱除煤气中的机械水分， 一般由多 级脱水设备组成。
湿法RSW净化系统主要由喷淋塔、环缝洗涤装置和脱水塔组成。喷淋 塔将煤气降温至75。C左右，同时起到预除尘的作用；环缝洗錄装置进一步 将煤气降温至65。C左右，起精除尘的作用。脱水塔作为脱除煤气中机械水 的装置。
我国目前使用的湿法OG系统普遍存在高的粉尘排放速率，煤气排放含 尘浓度超过100mg/m3 (标况），超过国家现行排放标准。系统运行能耗高， 系统运行阻损一般大于22kPa。湿法RSW系统煤气排放含尘浓度一般在80〜 100mg/m3 (标况），系统运行阻损一般大于20kPa，系统运行能耗与OG系统差不多。
干法LT净化系统主要由蒸发冷却器和静电除尘器组成。系统运行能耗 比OG和RSW系统低，净化效率高，排放浓度一般小于10mg/m3 (标况）。但 其投资高，系统运行不稳定;泄爆频繁，对静电除尘器内部损坏严重，影 响除尘效果，设备运行维护费用高，对炼钢生产有一定的影响。 发明内容
本发明的目的是提供一种净化回收工艺及系统，它解决了湿法OG所存 在的粉尘排放含尘浓度高以及和湿法RSW —样存在的系统能耗高，系统阻 损大和污水处理的问题，解决了干法LT投资高、系统运行不稳定和运行维 护费用高的问题；它的粉尘排放含尘浓度小于10mg/m3 (标况）。转炉在吹 氧冶炼时产生高温含尘烟气，经汽化冷却系统降温至S00〜100(TC，含尘 煤气通过膨胀节进入蒸发冷却器，被蒸汽或氮气和水组成的双相喷射装置 雾化冷却，煤气温度降至20(TC左右，然后煤气进入袋式除尘器进行过滤 净化，净化后的煤气根据系统煤气回收条件分别进行煤气回收或放散。本 发明的转炉煤净化回收工艺系统的优点是煤气净化效率高，净化后的煤气 含尘浓度小于10mg/m3 (标况）；系统运行阻力和能耗低，系统运行阻力小 于10kPa;系统没有污水等二次污染；系统运行维护费用低。该技术是一 种具有广泛推广价值的节能环保的新技术，可广泛应用在转炉煤气净化回 收系统上。
本发明的技术解决方案如下：
一种转炉煤气干法袋式净化回收工艺及系统，，净化回收系统主要包 括非金属膨胀节，蒸发冷却器，防爆脉冲袋式除尘器，煤气流量计，煤
气风机成套装置，旁通阀，三通切换阀，水封逆止阀，煤气冷却器，v型
水封，放散烟囱及点火装置，煤气分析装置及系统自动控制系统等。 转炉在吹氧冶炼时产生高温含尘煤气，煤气经汽化冷却系统降温至800〜100(TC，含尘煤气通过非金属膨胀节进入蒸发冷却器，被蒸汽或氮 气和水组成的双相喷射装置雾化冷却，煤气温度降至20(TC左右。双相喷 射装置根据煤气热容量的变化，通过温度调节系统控制喷水量的大小， 以此控制蒸发冷却器出口的温度和湿度满足要求。煤气在蒸发冷却器内 因其流速的降低和粉尘的加湿凝聚， 一部分粒径较大的粉尘靠自重沉降 在灰斗内，收尘量约占总烟尘量的40%左右。然后煤气进入防爆脉冲袋式 除尘器进行过滤净化，净化后的煤气根据系统煤气回收条件由三通切换 阀进行切换控制，分别进行煤气回收或放散，具备回收条件时，煤气通 过水封逆止阀和V型水封进入煤气柜，否则煤气通过烟囱点火燃烧放散。 本发明的转炉煤气干法袋式净化回收工艺系统的优点是，煤气净化 效率高，净化后的煤气含尘浓度小于10mg/m3 (标况）；系统运行阻力和 能耗低，系统运行阻力小于10kPa;系统没有污水等二次污染；系统运行 维护费用低。
本净化回收系统既可适用于新建转炉项目的煤气净化及回收，也可 适用于对现有转炉煤气净化及回收系统的技术改造。 附图说明
附图是本发明的净化回收系统的流程示意图。
图中，件1为转炉，件2为汽化冷却装置，件3为膨胀节，件4 为蒸发冷却器，件5为贮灰仓，件6为连接管道，件7为袋式除尘器， 件8为煤气流量计，件9为煤气风机成套装置，件10为旁通阀，件 ll为三通切换阀，件12为放散烟囱，件13为水封逆止阀，件14为 煤气冷却器，件15为V型水封。 具体实施方式
参照附图，对本发明的具体实施作进一步说明：
转炉1的汽化冷却装置2与蒸发冷却器4通过膨胀节3连接，蒸发冷却器4与袋式除尘器7之间通过金属管道6相连接；袋式除尘器 7后面的管道系统6上安装有煤气流量计8、煤气风机成套装置9、旁 通阀10、三通切换阀11、放散烟囱12、水封逆止阀13、煤气冷却器 14和V型水封15。
转炉l在吹氧冶炼时产生高温含尘烟气，烟气中的主要成份是煤气， 烟气经汽化冷却装置2降温至800〜1000°C，含尘煤气通过膨胀节3进入 蒸发冷却器4，被蒸汽或氮气和水组成的双相喷射装置雾化冷却，煤气温 度降至20(TC左右。双相喷射装置根据煤气热容量的变化，通过温度调节 系统控制喷水量的大小，以此控制蒸发冷却器出口的温度和湿度满足要 求。煤气在蒸发冷却器内因其流速的降低和粉尘的加湿凝聚， 一部分粒 径较大的粉尘靠自重沉降在灰斗5内，收尘量约占总烟尘量的40%左右。 然后煤气进入袋式除尘器7进行过滤净化，净化后的煤气根据系统煤气 回收条件由三通切换阀ll进行切换控制，分别进行煤气回收或放散，具 备回收条件时，煤气通过水封逆止阔13、煤气冷却器14和V型水封15 进入煤气柜，否则煤气通过烟囱12点火燃烧放散。
当三通切换阀11出现故障时打开旁通阀10，煤气通过烟囱12点火 燃烧放散。
汽化冷却烟道2与蒸发冷却器4之间连接采用的膨胀节3材质为 非金属耐高温材料。
蒸发冷却器4主要由壳体、双相喷射喷嘴等组成。在蒸发冷却器 内环行布置的喷水管为双相喷射喷嘴，其相互间的角度和数量根据处 理的烟气量和喷水的覆盖面确定。煤气在蒸发冷却器内因其流速的降 低和粉尘的加湿凝聚， 一部分粒径较大的粉尘靠自重沉降在灰斗内。 然后由输送机卸入贮灰仓5内。双相喷射装置根据煤气热容量的变化， 通过温度调节系统控制喷水量的大小，以此控制蒸发冷却器出口的温度和湿度满足要求。
贮灰仓5的功能是贮存灰尘，然后定期由汽车运走回收利用。
袋式除尘器7为防爆脉冲袋式除尘器，主要由除尘器壳体、高温 滤袋、脉冲喷吹机构、防爆装置、输灰装置和控制系统等组成。高温 滤袋过滤效率高、寿命长、可长期在250'C使用。当含尘煤气由滤袋 外表面穿入内表面时，粉尘被滤袋阻留在外表面而由净煤气穿过。随 着滤袋外表面粉尘层的增厚，除尘器运行阻力达到预设值时，控制系 统自动启动脉冲喷吹系统用氮气进行清灰，灰尘被剥离下来落入除尘 器灰斗内。除尘器灰斗下部设置输送机将灰尘送入贮灰仓5内，定期 由汽车运走回收利用。
为保证进入煤气柜的煤气温度小于80°C ，在水封逆止阀13后设置 煤气冷却器14，煤气冷却器14由壳体和喷枪组成，喷枪设置的层数 和数量根据煤气流量和温度确定。
本发明的净化回收工艺及系统降低了系统的阻力，从而降低了系统的 电能消耗，系统净化效率高，粉尘排放浓度小于10mg/m3 (标况），特别是 系统没有污水等二次污染，该技术是一种具有广泛推广价值的节能环保的 新技术。
Claims (5)
1. 一种转炉煤气干法袋式净化回收工艺及系统，包括汽化冷却系统，煤气水封及煤气风机成套装置，转炉在吹氧冶炼时产生高温含尘烟气，经汽化冷却系统降温至800～1000℃，其特征在于：含尘煤气通过膨胀节进入蒸发冷却器，被蒸汽或氮气和水组成的双相喷射装置雾化冷却，煤气温度降至200℃左右，然后煤气进入袋式除尘器进行过滤净化，净化后的煤气根据系统煤气回收条件由三通切换阀进行切换控制，分别进行煤气回收或放散。
2. 根据权利要求1所述的转炉煤气干法袋式净化回收工艺及系统， 其特征在于：蒸发冷却器主要由壳体、双相喷射喷嘴等组成，在蒸发冷 却器内环行布置的喷水管为双相喷射喷嘴，其相互间的角度和数量根据 处理的烟气量和喷水的覆盖面确定；蒸发冷却器的双相喷射装置根据煤 气热容量的变化，通过温度调节系统控制喷水量的大小，以此控制蒸发 冷却器出口的温度和湿度满足要求。
3. 根据权利要求1所述的转炉煤气干法袋式净化回收工艺及系统， 其特征在于：汽化冷却烟道与蒸发冷却器连接采用的膨胀节材质为非 金属耐高温材料。
4. 根据权利要求1所述的转炉煤气干法袋式净化回收工艺及系统，其特征在于：袋式除尘器为防爆脉冲袋式除尘器，主要由除尘器壳体、 高温滤袋、脉冲喷吹机构、防爆装置、输灰装置和控制系统等组成。
5. 根据权利要求1所述的转炉煤气干法袋式净化回收工艺及系统， 其特征在于：为保证进入煤气柜的煤气温度小于8(TC，在水封逆止阀后设置煤气冷却器，煤气冷却器由壳体和喷枪组成，喷枪设置的层数 和数量根据煤气流量和温度确定。
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974663A (zh) * | 2010-11-02 | 2011-02-16 | 大连理工大学 | 一种高温转炉煤气余热回收方法 |
| CN102071281A (zh) * | 2011-02-25 | 2011-05-25 | 辽宁环宇环保技术有限公司 | 转炉煤气干法袋式回收净化系统及工艺 |
| CN102086481A (zh) * | 2011-01-30 | 2011-06-08 | 中冶赛迪工程技术股份有限公司 | 一种煤气余热锅炉 |
| CN103146874A (zh) * | 2013-03-08 | 2013-06-12 | 中冶南方工程技术有限公司 | 转炉炼钢一次干法除尘蒸发冷却塔喷水量的控制方法 |
| CN103322822A (zh) * | 2013-06-25 | 2013-09-25 | 中国重型机械研究院股份公司 | 一种煤气干法降温净化回收系统 |
| CN103332489A (zh) * | 2013-06-28 | 2013-10-02 | 中冶南方工程技术有限公司 | 一种转炉煤气干法除尘粗灰气力输送方法 |
| CN103388046A (zh) * | 2013-06-28 | 2013-11-13 | 中冶南方工程技术有限公司 | 转炉煤气干法除尘细灰气力输送方法 |
| CN103388045A (zh) * | 2013-06-28 | 2013-11-13 | 中冶南方工程技术有限公司 | 一种转炉煤气干法除尘粗灰气力输送系统 |
| CN103789045A (zh) * | 2014-01-21 | 2014-05-14 | 成都易态科技有限公司 | 干馏煤气干法净化回收工艺及混合式气冷装置 |
| CN104728593A (zh) * | 2015-03-31 | 2015-06-24 | 北京首钢股份有限公司 | 一种煤气柜柜位调节系统 |
| CN104893762A (zh) * | 2015-06-15 | 2015-09-09 | 林兆晟 | 粗煤气除灰系统 |
| CN103675209B (zh) * | 2013-12-11 | 2016-08-17 | 武汉钢铁(集团)公司 | 一种煤气净化实验装置及其使用方法 |
| CN108379955A (zh) * | 2018-05-03 | 2018-08-10 | 佛山琴笙科技有限公司 | 一种双桶布袋吸尘机吸尘通道机构 |
-
2007
- 2007-11-28 CN CNA2007100930689A patent/CN101451173A/zh not_active Application Discontinuation
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974663A (zh) * | 2010-11-02 | 2011-02-16 | 大连理工大学 | 一种高温转炉煤气余热回收方法 |
| CN102086481A (zh) * | 2011-01-30 | 2011-06-08 | 中冶赛迪工程技术股份有限公司 | 一种煤气余热锅炉 |
| CN102086481B (zh) * | 2011-01-30 | 2012-10-24 | 中冶赛迪工程技术股份有限公司 | 一种煤气余热锅炉 |
| CN102071281A (zh) * | 2011-02-25 | 2011-05-25 | 辽宁环宇环保技术有限公司 | 转炉煤气干法袋式回收净化系统及工艺 |
| CN103146874A (zh) * | 2013-03-08 | 2013-06-12 | 中冶南方工程技术有限公司 | 转炉炼钢一次干法除尘蒸发冷却塔喷水量的控制方法 |
| CN103146874B (zh) * | 2013-03-08 | 2015-03-04 | 中冶南方工程技术有限公司 | 转炉炼钢一次干法除尘蒸发冷却塔喷水量的控制方法 |
| CN103322822B (zh) * | 2013-06-25 | 2015-04-22 | 中国重型机械研究院股份公司 | 一种煤气干法降温净化回收系统 |
| CN103322822A (zh) * | 2013-06-25 | 2013-09-25 | 中国重型机械研究院股份公司 | 一种煤气干法降温净化回收系统 |
| CN103388046A (zh) * | 2013-06-28 | 2013-11-13 | 中冶南方工程技术有限公司 | 转炉煤气干法除尘细灰气力输送方法 |
| CN103388045A (zh) * | 2013-06-28 | 2013-11-13 | 中冶南方工程技术有限公司 | 一种转炉煤气干法除尘粗灰气力输送系统 |
| CN103332489B (zh) * | 2013-06-28 | 2015-11-04 | 中冶南方工程技术有限公司 | 一种转炉煤气干法除尘粗灰气力输送方法 |
| CN103388046B (zh) * | 2013-06-28 | 2015-04-01 | 中冶南方工程技术有限公司 | 转炉煤气干法除尘细灰气力输送方法 |
| CN103388045B (zh) * | 2013-06-28 | 2015-04-01 | 中冶南方工程技术有限公司 | 一种转炉煤气干法除尘粗灰气力输送系统 |
| CN103332489A (zh) * | 2013-06-28 | 2013-10-02 | 中冶南方工程技术有限公司 | 一种转炉煤气干法除尘粗灰气力输送方法 |
| CN103675209B (zh) * | 2013-12-11 | 2016-08-17 | 武汉钢铁(集团)公司 | 一种煤气净化实验装置及其使用方法 |
| CN103789045A (zh) * | 2014-01-21 | 2014-05-14 | 成都易态科技有限公司 | 干馏煤气干法净化回收工艺及混合式气冷装置 |
| CN104728593A (zh) * | 2015-03-31 | 2015-06-24 | 北京首钢股份有限公司 | 一种煤气柜柜位调节系统 |
| CN104893762A (zh) * | 2015-06-15 | 2015-09-09 | 林兆晟 | 粗煤气除灰系统 |
| CN104893762B (zh) * | 2015-06-15 | 2017-07-14 | 林兆晟 | 粗煤气除灰系统 |
| CN108379955A (zh) * | 2018-05-03 | 2018-08-10 | 佛山琴笙科技有限公司 | 一种双桶布袋吸尘机吸尘通道机构 |
| CN108379955B (zh) * | 2018-05-03 | 2020-11-27 | 桐乡市舒适家具有限公司 | 一种双桶布袋吸尘机吸尘通道机构 |
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