CN204329002U - 循环流化床锅炉的二次再热装置 - Google Patents
循环流化床锅炉的二次再热装置 Download PDFInfo
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- CN204329002U CN204329002U CN201420823154.6U CN201420823154U CN204329002U CN 204329002 U CN204329002 U CN 204329002U CN 201420823154 U CN201420823154 U CN 201420823154U CN 204329002 U CN204329002 U CN 204329002U
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- reheat
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- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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[O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 6
- 239000003245 coal Substances 0.000 description 4
- 230000001105 regulatory Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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Abstract
本实用新型涉及一种循环流化床锅炉的二次再热装置。目前我国循环流化床锅炉机组均采用的一次再热系统，要进一步提供机组效率。一种循环流化床锅炉的二次再热装置，其组成包括：燃烧室（1），燃烧室上端内设置有一组一次再热器受热面高温段（7），燃烧室上面出口处与一组旋风分离器（2）连接，旋风分离器出口处与尾部烟道（4）连接，旋风分离器下与回料阀（3）连接，回料阀与炉外换热装置（9）连接，回料阀处安装有灰流量调节装置（8），炉外换热装置和回料阀与燃烧室下端连接，炉外换热装置内具有二次再热器受热面低温段（6）、二次再热器受热面高温段（10）和省煤器受热面（11）。本实用新型应用于循环流化床锅炉的二次再热装置。
Description
[0001] 技术领域:
[0002] 本实用新型涉及一种循环流化床锅炉的二次再热装置。
[0003] 背景技术:
[0004] 循环流化床(CFB)锅炉是具有高效率、低污染和良好综合利用的燃煤技术，由于它在煤种适应性和变负荷能力以及污染物排放上具有的独特优势。目前我国循环流化床锅炉机组均采用的一次再热系统，要进一步提供机组效率，采用二次再热是非常有效的方式，目前我公司煤粉锅炉二次再热技术的开发完成。因此，开发了用于循环流化床锅炉的二次再热系统。
[0005] 发明内容:
[0006] 本实用新型的目的是提供一种循环流化床锅炉的二次再热装置。
[0007] 上述的目的通过以下的技术方案实现:
[0008] 一种循环流化床锅炉的二次再热装置，其组成包括:燃烧室，所述的燃烧室上端内设置有一组一次再热器受热面高温段，所述的燃烧室上面出口处与一组旋风分离器连接，所述的旋风分离器出口处与尾部烟道连接，所述的旋风分离器下与回料阀连接，所述的回料阀与炉外换热装置连接，所述的回料阀处安装有灰流量调节装置，所述的炉外换热装置和回料阀与燃烧室下端连接，所述的炉外换热装置内具有二次再热器受热面低温段、二次再热器受热面高温段和省煤器受热面。
[0009] 所述的循环流化床锅炉的二次再热装置，所述的尾部烟道内分为双烟道，一个烟道内布置一次再热器低温段受热面，所述的双烟道底部安装有烟气调温挡板，所述的燃烧室中或至少一个炉外换热装置中布置一次再热受热面高温段，所述的炉外换热装置中至少布置一个一次再热器受热面低温段，所述的燃烧室中或至少一个炉外换热装置中布置一次再热受热面高温段。
[0010] 本实用新型的有益效果:
[0011] 1.本实用新型通过采用尾部挡板调温的双烟道结构和炉外可调节式换热装置结构来合理布置一次再热器和二次再热器受热面，并通过采用这两种结构的调节方式实现一次再热汽和二次再热汽汽温的单独调节，从而开发了用于循环流化床锅炉的二次再热系统。通过与带二次再热的汽轮机相结合，可有效提高的整个机组效率。
[0012] 附图说明:
[0013] 附图1是本实用新型的第一种结构示意图。
[0014] 附图2是本实用新型的第二种结构示意图。
[0015] 附图3是本实用新型的第三种结构示意图。
[0016] 具体实施方式:
[0017] 实施例1:
[0018] 一种循环流化床锅炉的二次再热装置，其组成包括:燃烧室1，所述的燃烧室上端内设置有一组一次再热器受热面高温段7，所述的燃烧室上面出口处与一组旋风分离器2连接，所述的旋风分离器出口处与尾部烟道4连接，所述的旋风分离器下与回料阀3连接，所述的回料阀与炉外换热装置9连接，所述的回料阀处安装有灰流量调节装置8，所述的炉外换热装置和回料阀与燃烧室下端连接，所述的炉外换热装置内具有二次再热器受热面低温段6、二次再热器受热面高温段10和省煤器受热面11。
[0019] 实施例2:
[0020] 根据实施例1所述的循环流化床锅炉的二次再热装置，其特征是:所述的尾部烟道内分为双烟道，一个烟道内布置一次再热器低温段受热面12，所述的双烟道底部安装有烟气调温挡板5，所述的燃烧室中或至少一个炉外换热装置中布置一次再热受热面高温段，所述的炉外换热装置中至少布置一个一次再热器受热面低温段，所述的燃烧室中或至少一个炉外换热装置中布置一次再热受热面高温段。
[0021] 实施例3:
[0022] 根据实施例1或2所述的循环流化床锅炉的二次再热装置，在循环流化床锅炉炉膛产生的烟气携带高温物料进入旋风分离器，经旋风分离器分离后，大量高温物料被分离下来进入回料阀，烟气和少量携带少量细颗粒物料进入尾部双烟道。
[0023] 在回料阀中，一部分高温物料通过回料阀的返料腿直接返回炉膛，另一部分物料进入炉外可调节式换热装置中，每个回料阀对应一个可调节式换热装置。
[0024] 每个可调节式换热装置包括一个灰流量调节装置和一个炉外换热装置，灰流量调节装置与回料阀连接，在至少一个炉外换热装置中布置有二次再热器低温段或高温段受热面，通过灰流量调节装置可控制进入炉外换热装置的灰流量，实现调节炉外换热装置的换热量，从而实现调节二次再热汽的汽温，经换热后的物料返回炉膛中。
[0025] 尾部烟道采用挡板调温的双烟道结构，共分为两个并行烟道，在其中一个烟道内布置一次再热器低温段受热面，在双烟道底部设置烟气调温挡板，通过烟气调节挡板可调节进入两个烟道的烟气量，实现调节一次再热器的换热量，从而实现调节一次再热汽的汽温。
[0026] 通过采用尾部挡板调温的双烟道结构和炉外可调节式换热装置结构来合理布置一次再热器和二次再热器受热面，并通过采用这两种结构的调节方式实现一次再热汽和二次再热汽汽温的单独调节，从而开发了用于循环流化床锅炉的二次再热系统。通过与带二次再热的汽轮机相结合，可有效提高的整个机组效率，减少供电煤耗。
Claims (2)
1.一种循环流化床锅炉的二次再热装置，其组成包括:燃烧室，其特征是:所述的燃烧室上端内设置有一组一次再热器受热面高温段，所述的燃烧室上面出口处与一组旋风分离器连接，所述的旋风分离器出口处与尾部烟道连接，所述的旋风分离器下与回料阀连接，所述的回料阀与炉外换热装置连接，所述的回料阀处安装有灰流量调节装置，所述的炉外换热装置和回料阀与燃烧室下端连接，所述的炉外换热装置内具有二次再热器受热面低温段、二次再热器受热面高温段和省煤器受热面。
2.根据权利要求1所述的循环流化床锅炉的二次再热装置，其特征是:所述的尾部烟道内分为双烟道，一个烟道内布置一次再热器低温段受热面，所述的双烟道底部安装有烟气调温挡板，所述的燃烧室中或至少一个炉外换热装置中布置一次再热受热面高温段，所述的炉外换热装置中至少布置一个一次再热器受热面低温段，所述的燃烧室中或至少一个炉外换热装置中布置一次再热受热面高温段。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104501142A (zh) * | 2014-12-23 | 2015-04-08 | 哈尔滨锅炉厂有限责任公司 | 循环流化床锅炉的二次再热装置及再热方法 |
| CN106402848A (zh) * | 2016-12-05 | 2017-02-15 | 大连科林能源工程技术开发有限公司 | 一种煤化工业环保型大容量高温高压低含尘热风发生系统 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501142A (zh) * | 2014-12-23 | 2015-04-08 | 哈尔滨锅炉厂有限责任公司 | 循环流化床锅炉的二次再热装置及再热方法 |
| CN106402848A (zh) * | 2016-12-05 | 2017-02-15 | 大连科林能源工程技术开发有限公司 | 一种煤化工业环保型大容量高温高压低含尘热风发生系统 |
| CN106402848B (zh) * | 2016-12-05 | 2018-08-14 | 大连科林能源工程技术开发有限公司 | 一种煤化工业环保型大容量高温高压低含尘热风发生系统 |
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