CN101936522A - 电站低低温省煤器 - Google Patents
电站低低温省煤器 Download PDFInfo
- Publication number
- CN101936522A CN101936522A CN2010102605706A CN201010260570A CN101936522A CN 101936522 A CN101936522 A CN 101936522A CN 2010102605706 A CN2010102605706 A CN 2010102605706A CN 201010260570 A CN201010260570 A CN 201010260570A CN 101936522 A CN101936522 A CN 101936522A
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- low
- gas
- heat exchanger
- economizer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007789 gas Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 abstract description 2
- 239000003546 flue gas Substances 0.000 description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 239000000428 dust Substances 0.000 description 7
- 238000005453 pelletization Methods 0.000 description 6
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/008—Adaptations for flue-gas purification in steam generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/16—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
- F28D21/001—Recuperative heat exchangers the heat being recuperated from exhaust gases for thermal power plants or industrial processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/1615—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
- F28D7/1623—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium with particular pattern of flow of the heat exchange media, e.g. change of flow direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
本发明涉及一种电站低低温省煤器,属于电站锅炉余热回收节能设备技术领域。所述省煤器由若干个结构相同的低低温省煤器模块组成,每个低低温省煤器模块包括换热管组(2)、支撑板(3)、围板(4)、连通管(5)、进水口(1)和出水口(6),换热管组(2)包括换热管(201)和集箱(202),换热管(201)外围用围板(4)包覆,且换热管(201)两端伸出围板(4)外,围板(4)内、换热管(201)外形成烟气通道,多根换热管(201)端部与集箱(202)焊接连接,形成换热管组(2),各换热管组(2)之间由连通管(5)进行连通,在靠近烟气出口侧的换热管组(2)上设置进水口(1),在靠近烟气进口侧的换热管组(2)上设置出水口(6)。本发明可以深度降低锅炉排烟度,回收热量,减少电厂耗水,并能有效防止烟囱的腐蚀。
Description
(一)技术领域
本发明涉及一种能够深度降低电站锅炉排烟温度的电站低低温省煤器。属于电站锅炉余热回收节能设备备技术领域。
(二)背景技术
火电厂一般都安装了除尘系统和脱硫系统。除尘系统主要为静电除尘和布袋除尘。脱硫系统大部分采用石灰石/石灰一石膏湿法烟气脱硫工艺。脱硫系统设置在除尘系统的下游,烟气除尘后再进入脱硫设备进行脱硫。
为了避免除尘系统的露点腐蚀,除尘系统出口烟气温度均高于120℃。为了保证脱硫的效率和脱硫系统的安全性,一般要求进入脱硫系统的烟气温度在80~90℃。
如上所述,经过除尘器出来的烟气温度大于120℃,而烟气在进入脱硫系统之前烟气温度要降到低于90℃。
以往较为普通的做法是:
1、使用GGH(烟气-烟气换热器),即采用脱硫系统后的低温烟气对进入脱硫系统前的高温烟气进行降温后再排入烟囱,使得排入烟囱的烟温得到提高,但实践证明GGH故障较多,也并不能有效防止烟囱的腐蚀,同时烟气的热量并未被吸收利用,GGH已逐渐被大多数电厂摈弃。
2、另一种降温方法就是在烟气中喷水降温,这样不仅耗费大量的水,同时也浪费了大量的热量。
(三)发明内容
本发明的目的在于克服上述不足,提供一种能够安装在电站锅炉除尘系统和脱硫系统之间的电站低低温省煤器,以深度降低锅炉排烟度,回收热量,减少电厂耗水,并能有效防止烟囱的腐蚀。
本发明的目的是这样实现的:一种电站低低温省煤器,由若干个结构相同的低低温省煤器模块组成,每个低低温省煤器模块包括换热管组、支撑板、围板、连通管、进水口和出水口,换热管组包括换热管和集箱,换热管有多根,多根换热管横向布置,支撑板纵向间隔支撑连接于换热管上,换热管外围用围板包覆,且换热管两端伸出围板外,围板内、换热管外形成烟气通道,多根换热管端部与集箱焊接连接,形成换热管组,各换热管组之间由连通管进行连通,在靠近烟气出口侧的换热管组上设置进水口,在靠近烟气进口侧的换热管组上设置出水口。
每个低低温省煤器模块水侧采用换热管组并联方式,使每个低低温省煤器模块水侧相对独立。
所述换热管采用带扩展受热面的螺旋翅片管。
电站锅炉除尘之后的烟气在电站低低温省煤器内被冷却,烟气温度降到90℃左右进入脱硫塔。
水从进水口进入依次流经换热管组,在换热管组内被加热,由出水口供向外界。
本发明的有益效果是:
1、深度降低电站锅炉排烟度、回收热量、减少电厂耗水。
2、模块化出厂,保证制造质量,减少现场安装工作量。每个低低温省煤器模块水侧相对独立,一旦其中某个模块发生故障,可用阀门切断水流不影响其它模块的使用。
3、螺旋翅片管采用ND钢(09CrCuSb)材质或碳钢镍基渗层焊工艺确保换热管的耐磨性和耐硫酸腐蚀性,保证使用寿命。
4、每个模块水侧采用换热管组并联方式,可以降低水阻力。
(四)附图说明
图1为本发明电站低低温省煤器的总体结构示意图。
图2为图1的右侧视图。
图3为本发明的低低温省煤器模块结构示意图。
图4为本发明的换热管组结构示意图。
图5为本发明的换热管结构示意图。
图6为图5的I放大图。
图7为本发明的工作流程示意图。
图中附图标记:
进水口1、换热管组2、支撑板3、围板4、连通管5、出水口6、低低温省煤器模块7;
换热管201、集箱202;
进水A1、出水A2、烟气进B1、烟气出B2、检修通道C、进水阀门D1、出水阀门D2。
(五)具体实施方式
参见图1~3,图1为本发明电站低低温省煤器的总体结构示意图。图2为图1的右侧视图。图3为本发明的低低温省煤器模块结构示意图。由图1、图2和图3可以看出,本发明电站低低温省煤器,由若干个结构相同的低低温省煤器模块组成,每个低低温省煤器模块包括换热管组2、支撑板3、围板4、连通管5、进水口1和出水口6,换热管组2包括换热管201和集箱202,如图4。换热管201有多根,多根换热管201横向布置,支撑板3纵向间隔支撑连接于换热管201上,换热管201外围用围板4包覆,且换热管201两端伸出围板4外,围板4内、换热管201外形成烟气通道,多根换热管201端部与集箱202焊接连接,形成换热管组2,各换热管组2之间由连通管5进行连通,在靠近烟气出口侧的换热管组2上设置进水口1,在靠近烟气进口侧的换热管组2上设置出水口6。
参见图5~6,图5为本发明的换热管结构示意图。图6为图5的I放大图。图5和图6可以看出,所述换热管201采用带扩展受热面的螺旋翅片管。螺旋翅片管采用ND钢(09CrCuSb)材质或碳钢镍基渗层焊工艺制成。
参见图7,图7为本发明的工作流程示意图。由图7可以看出,每个低低温省煤器模块水侧采用换热管组并联方式,使每个低低温省煤器模块水侧相对独立。进出水口由独立的阀门进行控制。
Claims (4)
1.一种电站低低温省煤器,其特征在于所述省煤器由若干个结构相同的低低温省煤器模块组成,每个低低温省煤器模块包括换热管组(2)、支撑板(3)、围板(4)、连通管(5)、进水口(1)和出水口(6),换热管组(2)包括换热管(201)和集箱(202),换热管(201)有多根,多根换热管(201)横向布置,支撑板(3)纵向间隔支撑连接于换热管(201)上,换热管(201)外围用围板(4)包覆,且换热管(201)两端伸出围板(4)外,围板(4)内、换热管(201)外形成烟气通道,多根换热管(201)端部与集箱(202)焊接连接,形成换热管组(2),各换热管组(2)之间由连通管(5)进行连通,在靠近烟气出口侧的换热管组(2)上设置进水口(1),在靠近烟气进口侧的换热管组(2)上设置出水口(6)。
2.根据权利要求1所述的一种电站低低温省煤器,其特征在于所述每个低低温省煤器模块水侧采用换热管组并联方式。
3.根据权利要求1或2所述的一种电站低低温省煤器,其特征在于所述换热管(201)采用带扩展受热面的螺旋翅片管。
4.根据权利要求3所述的一种电站低低温省煤器,其特征在于所述螺旋翅片管采用09CrCuSb材质制成。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102605706A CN101936522A (zh) | 2010-08-23 | 2010-08-23 | 电站低低温省煤器 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102605706A CN101936522A (zh) | 2010-08-23 | 2010-08-23 | 电站低低温省煤器 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101936522A true CN101936522A (zh) | 2011-01-05 |
Family
ID=43389986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102605706A Pending CN101936522A (zh) | 2010-08-23 | 2010-08-23 | 电站低低温省煤器 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101936522A (zh) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748746A (zh) * | 2012-05-14 | 2012-10-24 | 辽宁龙电伟业新能科技有限公司 | 一种锅炉低温省煤器 |
| 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 |
| CN112161291A (zh) * | 2020-11-06 | 2021-01-01 | 西安西热锅炉环保工程有限公司 | 一种有防冻功能的暖风器 |
| CN113654031A (zh) * | 2021-09-17 | 2021-11-16 | 西安热工研究院有限公司 | 一种防止烟气泄漏的低温省煤器结构 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1765970A (en) * | 1925-07-06 | 1930-06-24 | B F Sturtevant Co | Heat-exchange apparatus |
| US4031862A (en) * | 1976-03-10 | 1977-06-28 | Smith Frank J | Economizer |
| US4138969A (en) * | 1977-07-08 | 1979-02-13 | Applied Engineering Co. | Heat exchanger and economizer |
| CN101074771A (zh) * | 2006-05-09 | 2007-11-21 | 巴布考克及威尔考克斯公司 | 一种用于选择性催化反应器温度控制的多通道省煤器和方法 |
| CN201779643U (zh) * | 2010-08-23 | 2011-03-30 | 江苏双良锅炉有限公司 | 电站低低温省煤器 |
-
2010
- 2010-08-23 CN CN2010102605706A patent/CN101936522A/zh active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1765970A (en) * | 1925-07-06 | 1930-06-24 | B F Sturtevant Co | Heat-exchange apparatus |
| US4031862A (en) * | 1976-03-10 | 1977-06-28 | Smith Frank J | Economizer |
| US4138969A (en) * | 1977-07-08 | 1979-02-13 | Applied Engineering Co. | Heat exchanger and economizer |
| CN101074771A (zh) * | 2006-05-09 | 2007-11-21 | 巴布考克及威尔考克斯公司 | 一种用于选择性催化反应器温度控制的多通道省煤器和方法 |
| CN201779643U (zh) * | 2010-08-23 | 2011-03-30 | 江苏双良锅炉有限公司 | 电站低低温省煤器 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748746A (zh) * | 2012-05-14 | 2012-10-24 | 辽宁龙电伟业新能科技有限公司 | 一种锅炉低温省煤器 |
| 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 |
| CN112161291A (zh) * | 2020-11-06 | 2021-01-01 | 西安西热锅炉环保工程有限公司 | 一种有防冻功能的暖风器 |
| CN113654031A (zh) * | 2021-09-17 | 2021-11-16 | 西安热工研究院有限公司 | 一种防止烟气泄漏的低温省煤器结构 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102407070B (zh) | 一种烟气余热回收利用与除尘净化复合型设备 | |
| CN204923035U (zh) | 一种燃煤锅炉的烟气综合处理系统 | |
| CN205783036U (zh) | 一种电厂烟气系统换热装置 | |
| CN102444901A (zh) | 一种煤电厂组合式热管烟气余热回收系统及方法 | |
| JP2015525863A (ja) | 並流式ボイラー排煙ガス余熱回収システム | |
| CN103697730A (zh) | 一种高温烟气快速冷却器 | |
| CN106914124A (zh) | 湿法脱硫塔内热管换热节水除雾防石膏雨装置 | |
| CN107084384A (zh) | 一种火电厂锅炉排烟余热与水分双回收利用系统 | |
| CN102519278A (zh) | 一种从含尘酸性气体中回收热量的换热器 | |
| CN101706109B (zh) | 一种嵌入式锅炉烟气深度冷却器 | |
| CN201636884U (zh) | 一种锅炉烟气深度冷却余热回收装置 | |
| CN203053269U (zh) | 一种烟气加热装置 | |
| CN201779643U (zh) | 电站低低温省煤器 | |
| CN105371669A (zh) | 玻璃熔窑烟气及退火窑废气余热联合回收发电系统和方法 | |
| CN216694504U (zh) | 一种烧结烟气处理系统 | |
| CN203231327U (zh) | 一种烟气换热系统 | |
| CN103542420B (zh) | 一种燃煤锅炉含so3烟气的换热装置及方法 | |
| CN204345682U (zh) | 一种具有scr脱硝功能的锅炉烟气处理系统 | |
| CN108722380B (zh) | 一种粉状脱硫活性焦解析塔及工作方法 | |
| CN102767820B (zh) | 适用于变工况运行的电站锅炉尾部烟气余热利用系统 | |
| CN215638971U (zh) | 一种带扩展受热面的重力型热管 | |
| CN206823529U (zh) | 湿法脱硫塔内热管换热节水除雾防石膏雨装置 | |
| CN108679636A (zh) | 一种用于火电厂低温省煤器的清灰系统及运行方法 | |
| CN105889963B (zh) | 一种用于湿法脱硫系统的换热装置 | |
| CN203672200U (zh) | 一种高温烟气快速冷却器 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110105 |