WO2020029045A1 - 一种水泥厂窑头孰料冷却机废气余热过热器 - Google Patents

一种水泥厂窑头孰料冷却机废气余热过热器 Download PDF

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Publication number
WO2020029045A1
WO2020029045A1 PCT/CN2018/099058 CN2018099058W WO2020029045A1 WO 2020029045 A1 WO2020029045 A1 WO 2020029045A1 CN 2018099058 W CN2018099058 W CN 2018099058W WO 2020029045 A1 WO2020029045 A1 WO 2020029045A1
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Prior art keywords
exchange tube
heat
tube box
heat exchange
waste heat
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PCT/CN2018/099058
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English (en)
French (fr)
Inventor
刘祥斌
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江苏东九重工股份有限公司
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Priority to PCT/CN2018/099058 priority Critical patent/WO2020029045A1/zh
Publication of WO2020029045A1 publication Critical patent/WO2020029045A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the utility model relates to an exhaust gas waste heat superheater, and more particularly, to an exhaust gas waste heat superheater of a cement plant kiln head grate cooler.
  • the low-temperature exhaust gas discharged from the kiln head clinker cooler and kiln tail preheater passes through the kiln head steam waste heat boiler (AQC furnace for short) and the kiln tail steam waste heat boiler ( (SP furnace for short) realizes waste heat recovery of pure low temperature exhaust gas.
  • the function of the waste heat superheater of the kiln head waste cooler is to further heat the saturated steam produced by the AQC furnace and the SP furnace into superheated steam for the steam turbine to generate electricity.
  • the waste heat waste heat superheater of the kiln head grate cooler of the cement plant mainly relies on the spiral finned tube as the heat transfer surface.
  • Exhaust waste heat superheater furnace wall has poor sealing performance, is prone to air leakage, and reduces equipment thermal efficiency.
  • the purpose of the invention of the utility model is to provide a waste heat superheater for the waste heat of the kiln head grate cooler of the cement factory.
  • the waste heat superheater for the waste heat of the kiln head grate cooler of the cement factory solves the problem of severe wear and tear on the heat transfer surface of the superheater. Ash blocking in the heat transfer area severely caused problems such as abnormal equipment shutdown and poor sealing of the furnace wall.
  • the utility model relates to a waste heat superheater for the waste heat of a kiln head grate cooler in a cement plant, which includes a steel frame and a heat exchange tube box.
  • An inlet flue is provided at the bottom end, and an outlet flue is provided at the top of the heat exchange tube box.
  • a heat transfer surface is vertically arranged along the flue gas flow direction in the heat exchange tube box, and the heat transfer surface is a film type.
  • An inlet header and an outlet header are arranged from top to bottom on one side of the heat exchange tube box.
  • the heat exchange tube boxes are composed of a single group or multiple groups; when there are multiple heat exchange tube boxes, each group of heat exchange tube boxes is vertically stacked.
  • the bottom of the heat exchange tube box is provided with a ventilation device, the heat transfer surface is supported on the ventilation device, and the side of the heat exchange tube box is provided with an inspection door hole device.
  • An expansion and contraction device is arranged between the inlet and outlet header boxes and the ventilation device and the furnace wall of the heat exchange tube box, and the expansion and contraction device is welded to the inner steel protective plate of the furnace wall.
  • the membrane tube includes a base tube and a diaphragm welded between two adjacent base tubes.
  • the furnace wall of the heat exchange tube box is composed of inner and outer steel protective plates and a thermal insulation material disposed between the inner and outer steel protective plates.
  • the superheater heat exchanger tube box is assembled and modularized in the factory, which greatly improves the quality of equipment manufacturing, effectively avoids possible damage to the pressure-bearing components of the equipment during transportation, reduces the work intensity of the installation site, greatly shortens the installation cycle, and saves installation significantly. cost.
  • the heat transfer surface of the heat exchanger tube box of the superheater is a film tube.
  • the film tube has a screen structure and is vertically installed in the heat exchange tube box in accordance with the direction of the flue gas flow, thereby achieving enhanced heat transfer and improvement.
  • the effect of thermal efficiency avoid the abrasion of dust on the heat transfer surface from dust in the exhaust gas and the accumulation of dust in the exhaust gas on the surface of the heat transfer surface, which will cause the blockage of the heat transfer surface area.
  • the superheater heat exchange tube box adopts light furnace wall, and the inner and outer layers of the steel wall of the furnace wall are fully welded and sealed; the ends of the header and the ventilation device are provided with expansion and contraction devices through the furnace wall, which greatly improves the overall equipment.
  • the sealing performance can effectively avoid reducing the thermal efficiency of the equipment due to the leakage of the furnace wall.
  • Figure 1 is a layout diagram of the equipment of the present invention
  • this cement plant kiln head waste cooler waste heat superheater includes a steel frame 1, a heat exchange tube box 3, and the heat exchange tube box 3 is installed on a steel frame.
  • the inlet end of the heat exchange tube box 3 is provided with an inlet flue 2
  • the top of the heat exchange tube box 3 is provided with an outlet flue 4
  • the inside of the heat exchange tube box 3 is vertical along the flue gas flow direction.
  • a heat transfer surface 7 is provided.
  • the heat transfer surface 7 is a membrane tube 8.
  • An inlet header 5 and an outlet header 6 are arranged on one side of the heat exchange tube box 3 from top to bottom.
  • the heat exchange tube box 3 is composed of a single group or multiple groups, and multiple groups are vertically stacked.
  • a ventilation device 16 is provided at the bottom of the heat exchange tube box 3, a heat transfer surface 7 is supported on the ventilation device 16, and an inspection door hole device 17 is provided on the side of the heat exchange tube box 3.
  • the membrane tube 8 includes a base tube 9 and a diaphragm 10 welded between two adjacent base tubes 9.
  • the furnace wall 12 of the heat exchange tube box 3 is composed of an inner steel protective plate 13, an outer steel protective plate 14, and a heat insulating material 14 disposed between the inner and outer steel protective plates.
  • the furnace wall 12 has both heat insulation and The role of double seal.
  • the inlet header box 5, outlet header box 6, ventilation device 16 and the furnace wall 12 of the heat exchange tube box 3 are provided with an expansion and contraction device 11, which is welded to the interior of the furnace wall 12. On the steel guard plate 13.
  • the low-temperature exhaust gas from the kiln head cooler enters the heat exchange tube box 3 from the inlet flue 3, and the flue gas flows from the bottom to the heat transfer surface 7 arranged in the heat exchange tube box 3 and is discharged through the outlet flue 4.
  • the saturated steam enters from the inlet header 5 and flows through the heat transfer tube box 3 from top to bottom.
  • the saturated steam is heated by the flue gas to form superheated steam and flows out of the outlet header 7.
  • the flue gas and steam flow in opposite directions from each other It constitutes a countercurrent heat exchange with high heat recovery efficiency.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)

Abstract

本实用新型公开了一种水泥厂窑头孰料冷却机废气余热过热器，包括钢架、换热管箱，换热管箱安装在钢架上，换热管箱的底端设置有进口烟道，换热管箱的顶端设置有出口烟道，换热管箱内沿着烟气流向竖直的设置有传热面，传热面为膜式管，换热管箱一侧自上而下设置进口集箱和出口集箱。本实用新型解决了废气余热过热器传热面磨损严重、传热面区域易堵灰和炉墙密封性差等问题。

Description

一种水泥厂窑头孰料冷却机废气余热过热器 技术领域
本实用新型涉及一种废气余热过热器，更具体地涉及一种水泥厂窑头孰料冷却机废气余热过热器。
背景技术
新型干法水泥熟料生产线余热回收系统中，由窑头熟料冷却机、窑尾预热器排出的低温废气，分别通过设置窑头蒸汽余热锅炉(简称AQC炉)及窑尾蒸汽余热锅炉(简称SP炉)实现对纯低温废气的余热回收。窑头孰料冷却机废气余热过热器的作用是将AQC炉及SP炉生产的饱和蒸汽进一步加热成过热蒸汽供汽轮机发电用。目前，水泥厂窑头孰料冷却机废气余热过热器主要依靠螺旋翅片管作为传热面，实际运行过程中，存在以下几方面不足：
1.废气余热过热器传热面磨损严重，设备运维成本高；
2.废气余热过热器传热面区域堵灰严重，造成设备非正常停运；
3.废气余热过热器炉墙密封性差，易漏风，降低设备热效率。
发明内容
本实用新型发明的目的是提供一种水泥厂窑头孰料冷却机废气余热过热器，该水泥厂窑头孰料冷却机废气余热过热器解决了过热器传热面磨损严重运维成本高，传热面区域堵灰严重造成设备非正常停运和炉墙密封性差等问题。
为了实现上述发明目的，本实用新型的一种水泥厂窑头孰料冷却机废气余热过热器，包括钢架、换热管箱，换热管箱安装在钢架上，所述换热管箱的底端设置有进口烟道，换热管箱的顶端设置有出口烟道，所述换热管箱内沿着烟气流向竖直地设置有传热面，所述传热面为膜式管，所述换热管箱一侧自上而下设置进口集箱和出口集箱。所述换热管箱由单组或多组构成；换热管箱为多组时，各组换热管箱间竖直堆叠构成。所述换热管箱底部设有通风装置，传热面支撑于通风装置上，换热管箱侧面设有检查门孔装置。所述的进、出口集箱及通风装置均 与换热管箱的炉墙间设置有胀缩装置，所述胀缩装置焊固于所述炉墙的内钢护板上。所述膜式管包括基管以及焊接在相邻两基管之间的膜片。所述换热管箱的炉墙由内、外钢护板及设置在内、外钢护板之间的保温材料构成。
采用这种水泥厂窑头孰料冷却机废气余热过热器具有以下的优点：
1.过热器换热管箱制造厂内组装模块化出厂，大大提高设备制造质量，有效避免设备承压元件在运输过程中可能发生的损坏，降低安装工地工作强度，大大缩短安装周期大幅节省安装费用。
2.过热器换热管箱的传热面采用膜式管，所述膜式管呈屏状结构，竖直地与烟气流向一致的安装于换热管箱中，实现了强化传热提高热效率的效果，同时避免了废气中粉尘对传热面的磨损及废气中粉尘堆积在传热面表面造成传热面区域堵塞的情况发生，大大延长设备使用寿命，降低设备运维成本。
3.过热器换热管箱采用轻型炉墙，炉墙内、外两层钢护板采用全焊接密封结构；集箱及通风装置端部穿过炉墙处设置胀缩装置，大大提高设备整体密封性能，有效避免因炉墙漏风而降低设备热效率。
附图说明
图1是本实用新型的设备布置图；
图2是本实用新型的膜式管结构；
图3是本实用新型的胀缩装置结构；
图4是本实用新型的换热管箱的炉墙结构；
图中：1.钢架，2.进口烟道，3.换热管箱，4.出口烟道，5.进口集箱，6.出口集箱，7.传热面，8.膜式管，9.基管，10.膜片，11.胀缩装置，12.炉墙，13.炉墙内层钢护板，14.保温材料，15.炉墙外层钢护板，16.通风装置，17.检查门孔装置。
具体实施方式
附图非限制性地公开了本实用新型所涉及优选实施例的结构示意图；以下将结合附图详细地说明本实用新型的技术方案。
如图1、图2、图3及图4所示，这种水泥厂窑头孰料冷却机废气余热过热器，包括钢架1、换热管箱3，换热管箱3安装在钢架1上，所述换热管箱3的底端设置有进口烟道2，换热管箱3的顶端设置有出口烟道4，所述换热管箱3内沿着烟气流向竖直的设置有传热面7，所述传热面7为膜式管8，所述换热管箱3一侧自上而下设置进口集箱5和出口集箱6。所述换热管箱3由单组或多组构成，多组间竖直堆叠构成。所述换热管箱3底部设有通风装置16，传热面7支撑于通风装置16上，换热管箱3侧面设有检查门孔装置17。所述膜式管8包括基管9以及焊接在相邻两基管9之间的膜片10。所述换热管箱3炉墙12由内层钢护板13、外层钢护板14及设置在内、外钢护板之间的保温材料14构成，所述炉墙12兼具保温和双层密封的作用。所述的进口集箱5、出口集箱6及通风装置16与换热管箱3的炉墙12间设置有胀缩装置11，所述胀缩装置11焊固于所述炉墙12的内钢护板13上。窑头孰料冷却机低温废气从进口烟道3进入换热管箱3，所述烟气自下而上流过布置于换热管箱3内的传热面7，后经出口烟道4排出；饱和蒸汽自进口集箱5进入，从上而下流经换热管箱3，饱和蒸汽经烟气加热后形成过热蒸汽，从出口集箱7流出；烟气和蒸汽彼此沿着相反的方向流动，构成一种热回收效率高的逆流热交换。
上面结合附图所描述的本实用新型优选具体实施例仅用于说明本实用新型的实施方式，而不是作为对前述实用新型目的和所附权利要求内容和范围的限制，凡是依据本实用新型的技术实质对以上实施例所做的任何简单修改、等同变化与修饰，均仍属本实用新型技术和权利保护范畴。

Claims (6)

  1. 一种水泥厂窑头孰料冷却机废气余热过热器，包括钢架、换热管箱，换热管箱安装在钢架上，换热管箱的底端设置有进口烟道，换热管箱的顶端设置有出口烟道，换热管箱内沿着烟气流向竖直地设置有传热面，传热面为膜式管，换热管箱一侧自上而下设置进口集箱和出口集箱。
  2. 根据权利要求1水泥厂窑头孰料冷却机废气余热过热器，其特征在于：换热管箱由单组或多组构成；换热管箱为多组时，各组换热管箱间竖直堆叠构成。
  3. 根据权利要求1水泥厂窑头孰料冷却机废气余热过热器，其特征在于：换热管箱底部设有通风装置，传热面支撑于通风装置上，换热管箱侧面设有检查门孔装置。
  4. 根据权利要求3水泥厂窑头孰料冷却机废气余热过热器，其特征在于：的进、出口集箱及通风装置均与换热管箱的炉墙间设置有胀缩装置，胀缩装置焊固于炉墙的内钢护板上。
  5. 根据权利要求1水泥厂窑头孰料冷却机废气余热过热器，其特征在于：膜式管包括基管以及焊接在相邻两基管之间的膜片。
  6. 根据权利要求1水泥厂窑头孰料冷却机废气余热过热器，其特征在于：换热管箱的炉墙由内、外钢护板及设置在内、外钢护板之间的保温材料构成。
PCT/CN2018/099058 2018-08-06 2018-08-06 一种水泥厂窑头孰料冷却机废气余热过热器 WO2020029045A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201382702Y (zh) * 2009-02-17 2010-01-13 盐城市锅炉制造有限公司 一种硅铁矿热炉低温烟气余热发电锅炉
US20110000445A1 (en) * 2007-11-10 2011-01-06 English John R Package boiler having steam generating units in tandem
CN102788337A (zh) * 2012-07-16 2012-11-21 大连易世达新能源发展股份有限公司 一种水泥窑窑尾模块化旁路放风余热锅炉
CN203671946U (zh) * 2014-01-08 2014-06-25 张曹 聚光型真空平板集热器
CN204648982U (zh) * 2015-04-30 2015-09-16 江苏东九重工股份有限公司 一种水泥厂窑尾预热器纯低温烟气余热回收设备
CN205227289U (zh) * 2015-07-17 2016-05-11 江苏东九重工股份有限公司 一种水泥厂窑头孰料冷却机废气余热过热器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110000445A1 (en) * 2007-11-10 2011-01-06 English John R Package boiler having steam generating units in tandem
CN201382702Y (zh) * 2009-02-17 2010-01-13 盐城市锅炉制造有限公司 一种硅铁矿热炉低温烟气余热发电锅炉
CN102788337A (zh) * 2012-07-16 2012-11-21 大连易世达新能源发展股份有限公司 一种水泥窑窑尾模块化旁路放风余热锅炉
CN203671946U (zh) * 2014-01-08 2014-06-25 张曹 聚光型真空平板集热器
CN204648982U (zh) * 2015-04-30 2015-09-16 江苏东九重工股份有限公司 一种水泥厂窑尾预热器纯低温烟气余热回收设备
CN205227289U (zh) * 2015-07-17 2016-05-11 江苏东九重工股份有限公司 一种水泥厂窑头孰料冷却机废气余热过热器

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