CN203848266U - 高炉煤气锅炉烟气余热回收系统 - Google Patents
高炉煤气锅炉烟气余热回收系统 Download PDFInfo
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- CN203848266U CN203848266U CN201420215429.8U CN201420215429U CN203848266U CN 203848266 U CN203848266 U CN 203848266U CN 201420215429 U CN201420215429 U CN 201420215429U CN 203848266 U CN203848266 U CN 203848266U
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- flue gas
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- blast furnace
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- 239000007789 gas Substances 0.000 title claims abstract description 55
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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[O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000003546 flue gas Substances 0.000 title claims abstract description 39
- 239000002918 waste heat Substances 0.000 title claims abstract description 31
- 238000004064 recycling Methods 0.000 title abstract 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 140
- 238000011084 recovery Methods 0.000 claims description 24
- 239000000779 smoke Substances 0.000 claims description 6
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- 229910052717 sulfur Inorganic materials 0.000 description 1
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Abstract
本实用新型公开一种高炉煤气锅炉烟气余热回收系统，主要针对现有技术的高炉煤气锅炉尾部烟气存在较大利用空间而设计。本实用新型高炉煤气锅炉烟气余热回收系统，包括锅炉、设置在所述锅炉尾部烟道中的煤气加热器，所述煤气加热器的烟气出口端与烟气-凝结水换热器的烟气进口端相连，所述烟气-凝结水换热器的烟气出口端与引风机相连，所述烟气-凝结水换热器的水侧连接有烟气-凝结水换热单元和烟气-热网水换热单元，所述烟气余热回收系统还包括若干切换阀。本实用新型能够有效回收并利用高炉煤气锅炉产生的烟气余热。
Description
技术领域
[0001] 本实用新型涉及锅炉余热回收领域，尤其涉及一种高炉煤气锅炉烟气余热回收系 统。 高炉煤气锅炉烟气余热回收系统
背景技术
[0002] 钢铁企业在炼铁工序中产生了大量的高炉煤气，由于高炉煤气内含有大量氮气和 二氧化碳，理论燃烧温度低、着火困难，使得许多钢铁企业高炉煤气的放散率偏高，造成资 源的浪费。因此，如何利用好钢铁生产工艺中副产的高炉煤气资源，是相关技术领域人员普 遍关心的问题。
[0003] 近年来，随着高炉煤气锅炉发电技术的日益进步和推广，高炉煤气锅炉发电机组 在钢铁企业得到了广泛应用。由于燃料成本低，系统简单，利用高炉煤气发电可大大减少燃 料运输成本和基建成本，具有可观的经济效益。
[0004] 由于高炉煤气所特有的燃烧特性，高炉煤气锅炉的排烟温度通常处于较高水 平。目前，国内各钢铁厂高炉煤气锅炉的排烟温度基本上都在140°c以上，有的甚至高达 180°C。一方面，如此高温的烟气经烟囱直接排入大气，烟气中的大部分余热没有得到回收 利用，造成了能源的极大浪费。而另一方面，高炉煤气的含硫量很低，几乎可以忽略不计，因 此高炉煤气的锅炉基本上不存在低温腐蚀的问题，使得高炉煤气产生的烟气还存在很大的 利用空间。 实用新型内容
[0005] 针对上述问题，本实用新型提供一种能够有效回收锅炉烟气余热的高炉煤气锅炉 烟气余热回收系统。
[0006] 为达到上述目的，本实用新型高炉煤气锅炉烟气余热回收系统，包括锅炉，所述锅 炉的尾部烟道中设有煤气加热器，所述煤气加热器的烟气出口端与烟气-凝结水换热器的 烟气进口端相连，所述烟气-凝结水换热器的烟气出口端与引风机相连，所述烟气-凝结水 换热器的水侧分别连接有烟气-凝结水换热单元和烟气-热网水换热单元，所述烟气余热 回收系统还包括分别连接在所述烟气-凝结水换热单元和所述烟气-热网水换热单元上的 切换阀。
[0007] 进一步地，所述烟气-凝结水换热单元包括低压加热器，所述低压加热器的进口 管与所述烟气-凝结水换热器的水侧进口管通过第一联络管相连，所述低压加热器的出口 管与所述烟气-凝结水换热器的水侧出口管通过第二联络管相连。
[0008] 进一步地，所述烟气-热网水换热单元包括热网水-凝结水换热器，所述热网 水-凝结水换热器通过水循环管路分别与所述烟气-凝结水换热器的水侧进口管和出口管 相连，所述水循环管路上连接有循环水泵。
[0009] 具体地，所述第一联络管上设有第一切换阀，所述第二联络管上设有第二切换阀。
[0010] 具体地，所述烟气-凝结水换热器的水侧进口管与所述水循环管路连接端设有第 三切换阀，所述烟气-凝结水换热器的水侧出口管与所述水循环管路连接端设有第四切换 阀。
[0011] 具体地，所述水循环管路上还连接有膨胀水箱，所述膨胀水箱与所述水循环管路 的连接点设置在所述循环水泵的进口之前。
[0012] 特别地，所述热网水-凝结水换热器的热网水侧管路上连接有热网水增压泵。
[0013] 本实用新型高炉煤气锅炉烟气余热回收系统，在所述烟气-凝结水换热器的水 侧分别连接烟气-凝结水换热单元和烟气-热网水换热单元，通过切换阀来实现所述烟 气-凝结水换热单元和所述烟气-热网水换热单元之间的系统切换工作，本实用新型的有 益效果是：
[0014] 1、在非采暖期，通过开启所述烟气-凝结水换热单元将煤气锅炉的烟气余热回收 至汽轮机回热系统，用于加热凝结水，减少了汽轮机低压加热器的抽气量，节省的回热抽汽 可以在汽轮机中继续做功，从而在整体上增加机组的发电量；
[0015] 2、在冬季采暖期，通过开启所述烟气-热网水换热单元将煤气锅炉的烟气余热回 收至热网换热系统，对于热源主要来自于汽轮机抽汽的热网系统，可减少机组的采暖抽汽 量，同样可实现增加发电量的目的，此外，由于采暖抽汽的能级往往比低压加热器回热抽汽 的能级要高，因此由热力学原理分析可知，在冬季将烟气余热作为热网热源与作为低加热 源相比，可获得更好地经济效益；而对于热源主要来自锅炉房的热网系统，则可减少锅炉房 燃料消耗量，节省锅炉房运行成本。
附图说明
[0016] 图1是本实用新型高炉煤气锅炉烟气余热回收系统的结构示意图。
具体实施方式
[0017] 下面结合说明书附图对本实用新型做进一步的描述。
[0018] 如图1所示，本实用新型高炉煤气锅炉烟气余热回收系统，包括锅炉1，所述锅炉1 的尾部烟道中设有煤气加热器2,所述煤气加热器2与烟气-凝结水换热器3相连，所述烟 气-凝结水换热器3设置有放热的烟气侧和吸热的水侧，其中所述烟气-凝结水换热器3 的烟气进口端与所述煤气加热器2的烟气出口端相连，接受来自所述锅炉1尾部排放的烟 气，所述烟气-凝结水换热器3的烟气出口端与锅炉的引风机4相连，并通过所述引风机4 将烟气抽至烟®排向大气。
[0019] 所述烟气-凝结水换热器3的水侧分别连接有烟气-凝结水换热单元和烟气-热 网水换热单元，所述烟气余热回收系统还包括若干切换阀，通过所述切换阀控制所述烟 气-凝结水换热单元的开启和所述烟气-热网水换热单元的闭合，或通过所述切换阀控制 所述烟气-凝结水换热单元的闭合和所述烟气-热网水换热单元的开启。
[0020] 其中，所述烟气-凝结水换热单元包括低压加热器5,所述低压加热器5的进口管 与所述烟气-凝结水换热器3的水侧进口管通过第一联络管相连，将所述低压加热器5的 进口凝结水引入到所述烟气-凝结水换热器3中进行加热；所述低压加热器5的出口管与 所述烟气-凝结水换热器3的水侧出口管通过第二联络管相连，将加热后的凝结水汇入所 述低压加热器5的主凝结水中。在所述第一联络管上设有第一切换阀10a，所述第二联络管 上设有第二切换阀l〇b。
[0021 ] 所述烟气-热网水换热单元包括热网水-凝结水换热器8，所述热网水-凝结水换 热器8通过水循环管路9分别与所述烟气-凝结水换热器3的水侧进口管和出口管相连， 所述水循环管路9上设有循环水泵11，用于克服水循环管路以及换热器带来的阻力。
[0022] 在所述烟气-凝结水换热器3的水侧进口管与所述水循环管路9连接端的水循环 管路上设有第三切换阀l〇c，在所述烟气-凝结水换热器3的水侧出口管与所述水循环管路 9连接端的水循环管路上设有第四切换阀10d。
[0023] 所述水循环管路9上还连接有膨胀水箱6,所述膨胀水箱6与所述水循环管路9的 连接点设置在所述循环水泵11与所述水循环管路9的连接点之前，通过所述膨胀水箱6对 系统进行补水，同时起到平衡水循环与稳压的作用，所述膨胀水箱6的补水采用和凝结水 水质相同的化学除盐水。
[0024] 所述热网水-凝结水换热器8的热网水侧管路上设有热网水增压泵7,用于克服热 网水侧管路以及换热器带来的阻力，来自热网回水母管的热网水经过热网水增压泵7后进 入到所述热网水-凝结水换热器8中进行加热，再将加热后的热网水流至热网供水母管进 行处理。
[0025] 在非采暖期，开启第一切换阀10a和第二切换阀10b，关闭第三切换阀10c和第四 切换阀l〇d，所述高炉煤气锅炉烟气余热回收系统启用烟气-凝结水换热单元进行工作，将 煤气锅炉的烟气余热回收至汽轮机回热系统，用于加热凝结水，减少了汽轮机低压加热器 的回热抽汽量，从而在整体上增加了高炉煤气锅炉发电机组的发电量；在冬季采暖期，开启 第三切换阀l〇c和第四切换阀10d，关闭第一切换阀10a和第二切换阀10b，所述高炉煤气 锅炉烟气余热回收系统启用烟气-热网水换热单元进行工作，将煤气锅炉的烟气余热回收 至热网水换热系统，对于热源主要来自于汽轮机抽汽的热网系统，可减少机组的采暖抽汽 量，同样增加了高炉煤气锅炉发电机组的发电量，此外，由于采暖抽汽的能级往往比低压 加热器回热抽汽的能级要高，因此在冬季将烟气余热作为热网热源与作为低加热源相比， 可获得更好的经济效益；而对于热源主要来自锅炉房的热网系统，则可减少锅炉房燃料消 耗量，节省锅炉房运行成本。
[0026] 以上，仅为本实用新型的较佳实施例，但本实用新型的保护范围并不局限于此，任 何熟悉本技术领域的技术人员在本实用新型揭露的技术范围内，可轻易想到的变化或替 换，都应涵盖在本实用新型的保护范围之内。因此，本实用新型的保护范围应该以权利要求 所界定的保护范围为准。
Claims (7)
1. 一种高炉煤气锅炉烟气余热回收系统，其特征在于：包括锅炉、设置在所述锅炉尾 部烟道中的煤气加热器，所述煤气加热器的烟气出口端与烟气-凝结水换热器的烟气进口 端相连，所述烟气-凝结水换热器的烟气出口端与引风机相连，所述烟气-凝结水换热器的 水侧分别连接有烟气-凝结水换热单元和烟气-热网水换热单元，所述烟气余热回收系统 还包括分别连接在所述烟气-凝结水换热单元和所述烟气-热网水换热单元上的切换阀。
2. 根据权利要求1所述的高炉煤气锅炉烟气余热回收系统，其特征在于：所述烟 气-凝结水换热单元包括低压加热器，所述低压加热器的进口管与所述烟气-凝结水换热 器的水侧进口管通过第一联络管相连，所述低压加热器的出口管与所述烟气-凝结水换热 器的水侧出口管通过第二联络管相连。
3. 根据权利要求1所述的高炉煤气锅炉烟气余热回收系统，其特征在于：所述烟 气-热网水换热单元包括热网水-凝结水换热器，所述热网水-凝结水换热器通过水循环 管路分别与所述烟气-凝结水换热器的水侧进口管和出口管相连，所述水循环管路上连接 有循环水泵。
4. 根据权利要求2所述的高炉煤气锅炉烟气余热回收系统，其特征在于：所述第一联 络管上设有第一切换阀，所述第二联络管上设有第二切换阀。
5. 根据权利要求3所述的高炉煤气锅炉烟气余热回收系统，其特征在于：所述烟 气-凝结水换热器的水侧进口管与所述水循环管路连接端设有第三切换阀，所述烟气-凝 结水换热器的水侧出口管与所述水循环管路连接端设有第四切换阀。
6. 根据权利要求3所述的高炉煤气锅炉烟气余热回收系统，其特征在于：所述水循环 管路上还连接有膨胀水箱，所述膨胀水箱与所述水循环管路的连接点设置在所述循环水泵 的进口之前。
7. 根据权利要求3所述的高炉煤气锅炉烟气余热回收系统，其特征在于：所述热网 水-凝结水换热器的热网水侧管路上连接有热网水增压泵。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105695649A (zh) * | 2016-04-15 | 2016-06-22 | 中冶华天工程技术有限公司 | 基于高炉炼铁的分布式能源系统 |
| CN105823109A (zh) * | 2016-03-29 | 2016-08-03 | 国网山东省电力公司电力科学研究院 | 一种机组中对外供热的系统及方法 |
| CN109028047A (zh) * | 2018-06-29 | 2018-12-18 | 国网山东省电力公司电力科学研究院 | 一种循环流化床供热机组冷渣器余热利用系统 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823109A (zh) * | 2016-03-29 | 2016-08-03 | 国网山东省电力公司电力科学研究院 | 一种机组中对外供热的系统及方法 |
| CN105695649A (zh) * | 2016-04-15 | 2016-06-22 | 中冶华天工程技术有限公司 | 基于高炉炼铁的分布式能源系统 |
| CN105695649B (zh) * | 2016-04-15 | 2017-06-30 | 中冶华天工程技术有限公司 | 基于高炉炼铁的分布式能源系统 |
| CN109028047A (zh) * | 2018-06-29 | 2018-12-18 | 国网山东省电力公司电力科学研究院 | 一种循环流化床供热机组冷渣器余热利用系统 |
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