US20160313076A1 - Air preheater and method for preventing corrosion and blockage of the same - Google Patents

Air preheater and method for preventing corrosion and blockage of the same Download PDF

Info

Publication number
US20160313076A1
US20160313076A1 US15/202,520 US201615202520A US2016313076A1 US 20160313076 A1 US20160313076 A1 US 20160313076A1 US 201615202520 A US201615202520 A US 201615202520A US 2016313076 A1 US2016313076 A1 US 2016313076A1
Authority
US
United States
Prior art keywords
segment
ammonium bisulfate
air
curing
condensation
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.)
Abandoned
Application number
US15/202,520
Other languages
English (en)
Inventor
Xuelue Qian
Maoling LIU
Ronge HE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hotant Thermal Technology (jiangsu) Co Ltd
Original Assignee
Hotant Thermal Technology (jiangsu) Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hotant Thermal Technology (jiangsu) Co Ltd filed Critical Hotant Thermal Technology (jiangsu) Co Ltd
Assigned to Hotant Thermal Technology (Jiangsu) Co., Ltd. reassignment Hotant Thermal Technology (Jiangsu) Co., Ltd. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HE, Ronge, LIU, Maoling, QIAN, XUELUE
Publication of US20160313076A1 publication Critical patent/US20160313076A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/02—Arrangements of regenerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/04—Arrangements of recuperators
    • F23L15/045—Arrangements of recuperators using intermediate heat-transfer fluids
    • 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
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F23J2215/10—Nitrogen; Compounds thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/10—Catalytic reduction devices
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the invention relates to an air preheater and a method for preventing corrosion and blockage of the same.
  • Conventional flue gas denitration technology employs ammonia gas as a reducing agent.
  • the reducing agent reacts with sulfur trioxide in the flue gas to yield ammonia bisulfate.
  • an air preheater is provided to recycle heat energy.
  • the air preheater is of a regenerative type, as shown in FIG. 1 , and includes a high temperature segment, a medium temperature segment, and a low temperature segment.
  • Ammonium bisulfate exhibits strong viscosity in the medium temperature segment and the low temperature segment, and tends to adsorb dust particles and, as a result, block the air preheater. This increases the gas flow resistance, lowers the heat transfer efficiency, and adversely affects operation of the air preheater.
  • the air preheater is particularly practicable following a selective catalytic reduction (SCR) denitration.
  • SCR selective catalytic reduction
  • an air preheater comprising a flue and an air channel disposed on a downstream of a denitration device, a first segment for producing secondary air, a second segment for producing primary air, a third segment for anti-condensation of ammonium bisulfate, and a fourth segment for curing of ammonium bisulfate.
  • the first segment for producing secondary air, the second segment for producing primary air, the third segment for anti-condensation of ammonium bisulfate and the fourth segment for curing of ammonium bisulfate are disposed in that order along a gas flow direction.
  • the second segment for producing primary air, the third segment for anti-condensation of ammonium bisulfate, and the fourth segment for curing of ammonium bisulfate each comprise a phase-change heat exchanger.
  • the phase-change heat exchanger comprises a heat absorption segment disposed in the flue, a heat release segment disposed in the air channel, an ascending tube and a downcomer which are configured to connect the heat absorption segment and the heat release segment.
  • the heat release segment is disposed higher than the heat absorption segment, and the phase-change heat exchangers are provided with a cycling medium.
  • a wall surface temperature of the third segment for anti-condensation of ammonium bisulfate is higher than a dew temperature of the ammonium bisulfate.
  • a wall surface temperature of the fourth segment for curing of ammonium bisulfate is lower than a solidification point temperature of the ammonium bisulfate.
  • the air preheater further comprises an acid-dew resistant segment disposed on a downstream of the fourth segment for curing of ammonium bisulfate.
  • the acid-dew resistant segment comprises the phase-change heat exchanger, and a wall surface temperature of the acid-dew resistant segment is higher than an acid dew point temperature.
  • the heat absorption segment in the second segment for producing primary air, the heat absorption segment in the third segment for anti-condensation of ammonium bisulfate, the heat absorption segment in the fourth segment for curing of ammonium bisulfate, the heat absorption segment in the acid-dew resistant segment are provided with a temperature sensor.
  • the cycling medium in the second segment for producing primary air, the third segment for anti-condensation of ammonium bisulfate, the fourth segment for curing of ammonium bisulfate, and the acid-dew resistant segment is water, Freon, or heat transfer oil.
  • the first segment for producing secondary air is a high temperature segment of a regenerative air preheater.
  • the first segment for producing secondary air comprises the phase-change heat exchanger
  • the cycling medium in the second segment for producing primary air is water, Freon, or heat transfer oil.
  • the reaction of the escaped ammonia and the sulfur trioxide only produces gaseous and solid ammonium bisulfate, and no liquid ammonium bisulfate is produced, thus the air preheater is effectively prevented from blockage and corrosion caused by liquid ammonium bisulfate. Therefore, the service life of the air preheater is prolonged; the heat transfer efficiency of the boiler is improved; thus ensuring the stable and safe operation of the machine set.
  • the air preheater is disposed on a downstream of a denitration device using SCR denitration technology.
  • the method can prevent the corrosion and blockage of the heating surface of the air preheater.
  • a method for preventing an air preheater from corrosion and blockage comprising:
  • the wall surface temperature of the third segment and the fourth segment can be accurately controlled, so that the ammonium bisulfate is cured on the wall surface of the pipe of the fourth segment and the wall surface of the downstream pipe of the fourth segment, then the solid ammonium bisulfate is eliminated by blowing equipment.
  • the air preheater is effectively prevented from blockage and corrosion, thus ensuring the safe, reliable, and stable operation of the boiler.
  • FIG. 1 is a schematic diagram of an existing air preheater
  • FIG. 2 is a schematic diagram of an air preheater in accordance with one embodiment of the invention.
  • FIG. 3 is a schematic diagram of an air preheater in accordance with another embodiment of the invention.
  • an air preheater comprises a flue 1 and an air channel 2 disposed on the downstream of a denitration device, a first segment for producing secondary air 3 , a second segment for producing primary air 4 , a third segment for anti-condensation of ammonium bisulfate 5 , and a fourth segment for curing of ammonium bisulfate 6 disposed in that order along a gas flow direction.
  • the second segment for producing primary air 4 , the third segment for anti-condensation of ammonium bisulfate 5 , and the fourth segment for curing of ammonium bisulfate 6 each comprise a phase-change heat exchanger.
  • the phase-change heat exchanger comprises a heat absorption segment 7 disposed in the flue 1 , a heat release segment 8 disposed in the air channel 2 , an ascending tube 9 and a downcomer 10 which are configured to connect the heat absorption segment 7 and the heat release segment 8 .
  • the heat release segment 8 is higher than the corresponding heat absorption segment 7 , and the phase-change heat exchanger is provided with a cycling medium.
  • a wall surface temperature of the third segment for anti-condensation of ammonium bisulfate 5 is higher than a dew temperature of the ammonium bisulfate.
  • a wall surface temperature of the fourth segment for curing of ammonium bisulfate 6 is lower than a solidification point temperature of the ammonium bisulfate.
  • High-temperature flue gas (between 350 and 440° C.) in the flue 1 enters an upstream of the assembled air preheater, and passes the first segment for producing secondary air 3 , the heat-absorbing segment 7 of the second segment for producing primary air 4 , the heat-absorbing segment 7 of the third segment for anti-condensation of ammonium bisulfate 5 , and the heat-absorbing segment 7 of the fourth segment for curing of ammonium bisulfate 6 .
  • the high-temperature flue gas releases heat when passing the air preheater and heats the cycling medium in the heat absorption segment 7 of all phase-change heat exchangers.
  • the cycling medium in all phase-change heat exchangers absorbs heat released by the flue gas and generates a lift force because of a density difference, thus the cycling medium in the heat absorption segment 7 enters the heat release segment 8 via the ascending tube 9 , and after releasing heat to the air, the cycling medium in the heat release segment 8 is back to the heat absorption segment 7 via the downcomer 10 , hereby a self-cycle is realized and no external power is needed.
  • the pipe wall temperature of the third segment for anti-condensation of ammonium bisulfate 5 and the pipe wall temperature of an upstream of the third segment for anti-condensation of ammonium bisulfate 5 are higher than the dew temperature of the ammonium bisulfate (between 0 and 200° C.)
  • the pipe wall temperature of the fourth segment for curing of ammonium bisulfate 6 and the pipe wall temperature of a downstream of the fourth segment for curing of ammonium bisulfate 6 are lower than the solidification point temperature (147° C.) of the ammonium bisulfate
  • the reaction of escaped ammonia and sulfur trioxide only generates gaseous and solid ammonium bisulfate in the air preheater, no liquid ammonium bisulfate is produced, and the air preheater is effectively prevented from blockage and corrosion caused by liquid ammonium bisulfate.
  • cycling media in the second segment for producing primary air 4 , the third segment for anti-condensation of ammonium bisulfate 5 , the fourth segment for curing of ammonium bisulfate 6 , the acid-dew resistant segment 11 is selected from water, Freon, or heat transfer oil. In actual operation, a suitable cycling medium solution is determined according to different temperatures.
  • the downstream of the fourth segment for curing of ammonium bisulfate 6 is provided with an acid-dew resistant segment 11 .
  • the acid-dew resistant segment 11 comprises the phase-change heat exchanger, comprising the heat absorption segment 7 , the heat release segment 8 , the ascending tube 9 and the downcomer 10 .
  • the wall surface temperature of the acid-dew resistant segment 11 is higher than an acid dew point temperature (between 0 and 100° C.), thereby effectively preventing the acid dew corrosion, decreasing an energy consumption of the boiler, and saving energy and reducing emission to the largest extent.
  • the air is divided into two paths after heated by the second segment for producing primary air 4 , as shown in FIGS. 2-3 , the first path is used as a primary air for a pulverizing system, and the second path is heated by the first segment for producing secondary air 3 and is used as secondary air of the boiler, which means the primary air is not heated by the first segment for producing secondary air 3 .
  • Heat saved by the primary air can be used to heat materials in the third segment for anti-condensation of ammonium bisulfate 5 , the fourth segment for curing of ammonium bisulfate 6 , the acid-dew resistant segment 11 , or a combination thereof.
  • the air in the acid-dew resistant segment 11 , the fourth segment for curing of ammonium bisulfate 6 , the third segment for anti-condensation of ammonium bisulfate 5 , and the second segment for producing primary air 4 is exhausted, so that no non-condensable gas exists in cycling pipes of the phase-change heat exchangers, and the blockage caused by water or gas is avoided.
  • the flue gas temperature after denitration is between 350 and 440° C.
  • the heat absorption segment 7 in the second segment for producing primary air 4 , the heat absorption segment 7 in the third segment for anti-condensation of ammonium bisulfate 5 , the heat absorption segment 7 in the fourth segment for curing of ammonium bisulfate 6 , the heat absorption segment 7 in the acid-dew resistant segment 11 are provided with a temperature sensor 12 adapted to detect the wall surface temperatures of the segments.
  • the first segment for producing secondary air 3 is a high temperature segment of a regenerative air preheater.
  • the first segment for producing secondary air 3 can also be a phase-change heat exchanger, as shown in FIG. 3
  • the first segment for producing secondary air 3 also comprises the heat absorption segment 7 , the heat release segment 8 , the ascending tube 9 , and the downcomer 10
  • the cycling medium in the first segment for producing secondary air 3 is water, Freon, or heat transfer oil.
  • a method for preventing the air preheater from corrosion and blockage after an SCR denitration is also provided in the invention, and the method comprises:
  • phase-change heat exchanger compensates for the shortcomings in the prior art, featuring high industrial value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Air Supply (AREA)
  • Chimneys And Flues (AREA)
US15/202,520 2014-01-07 2016-07-05 Air preheater and method for preventing corrosion and blockage of the same Abandoned US20160313076A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201410006896.4A CN103982906B (zh) 2014-01-07 2014-01-07 适用于scr脱硝后的组合式空气预热器及防腐防堵方法
CN201410006896.4 2014-01-07
PCT/CN2014/075792 WO2015103823A1 (zh) 2014-01-07 2014-04-21 适用于scr脱硝后的组合式空气预热器及防腐防堵方法

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/075792 Continuation-In-Part WO2015103823A1 (zh) 2014-01-07 2014-04-21 适用于scr脱硝后的组合式空气预热器及防腐防堵方法

Publications (1)

Publication Number Publication Date
US20160313076A1 true US20160313076A1 (en) 2016-10-27

Family

ID=51274982

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/202,520 Abandoned US20160313076A1 (en) 2014-01-07 2016-07-05 Air preheater and method for preventing corrosion and blockage of the same

Country Status (5)

Country Link
US (1) US20160313076A1 (ko)
JP (1) JP6157757B2 (ko)
KR (1) KR101767365B1 (ko)
CN (1) CN103982906B (ko)
WO (1) WO2015103823A1 (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108413439A (zh) * 2018-04-23 2018-08-17 华北电力科学研究院有限责任公司 调整四分仓空气预热器出口烟气温度的装置及方法
CN116928690A (zh) * 2023-07-05 2023-10-24 山东中和泰节能环保科技有限公司 相变输热式旋流预热器

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109210555A (zh) * 2017-07-03 2019-01-15 大唐保定热电厂 电站锅炉脱硝投运空气预热器在线干烧清堵系统和技术
CN107198946B (zh) * 2017-07-04 2020-04-28 大唐环境产业集团股份有限公司 一种发电厂脱硝系统运行中空预器堵塞原因的判断方法
CN107191963B (zh) * 2017-07-10 2023-07-25 东方电气集团东方锅炉股份有限公司 一种回转式空气预热器及该回转式空气预热器防硫酸氢铵堵塞的方法
CN108019940B (zh) * 2017-12-05 2020-01-21 合山锌业科技有限公司 多燃料导热油炉
CN107940438B (zh) * 2017-12-26 2024-05-28 福建龙净环保股份有限公司 一种烟气热能利用系统及其控制方法
CN109028137A (zh) * 2018-08-06 2018-12-18 东方电气集团东方锅炉股份有限公司 一种预防硫酸氢铵沉积的管式预热器及其控制方法
CN109163351A (zh) * 2018-10-17 2019-01-08 中国电力工程顾问集团华北电力设计院有限公司 解决堵塞腐蚀问题的空气预热器组合结构
CN110455105A (zh) * 2019-09-10 2019-11-15 山东海汇环保设备有限公司 用于电厂烟气余热回收的被动式取热器
CN110793057B (zh) * 2019-10-18 2024-01-30 华电电力科学研究院有限公司 一种防止燃煤电厂空气预热器堵塞的系统及方法
KR102503254B1 (ko) * 2021-02-08 2023-02-24 주식회사 냄새뚝 배기가스 정화장치
CN113217941B (zh) * 2021-04-19 2022-07-29 华能铜川照金煤电有限公司 空预器堵塞预测与喷水喷氨优化防堵方法
CN113606969B (zh) * 2021-06-23 2024-02-09 上海志筠环保科技有限公司 可控型双相热媒强制循环换热系统
CN114440648A (zh) * 2022-01-14 2022-05-06 国能龙源催化剂江苏有限公司 一种脱硝催化剂生产窑炉管道废气净化方法
CN115539928A (zh) * 2022-02-24 2022-12-30 昊姆（上海）节能科技有限公司 一种自动控温避免烟气酸腐蚀的相变式换热器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623549A (en) * 1970-08-14 1971-11-30 Smitherm Industries Heat exchange methods and apparatus
US4044820A (en) * 1976-05-24 1977-08-30 Econo-Therm Energy Systems Corporation Method and apparatus for preheating combustion air while cooling a hot process gas
US4333517A (en) * 1979-07-10 1982-06-08 James Parro Heat exchange method using natural flow of heat exchange medium
US20120272626A1 (en) * 2009-11-25 2012-11-01 Babcock-Hitachi Kabushiki Kaisha Exhaust gas treatment device for an oxygen combustion system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5743195A (en) * 1980-08-29 1982-03-11 Gadelius Kk Rotary type heat exchanger
JPS58164923A (ja) * 1982-03-24 1983-09-29 Babcock Hitachi Kk 排煙処理装置
JPS61195210A (ja) * 1985-02-22 1986-08-29 Mitsubishi Heavy Ind Ltd 脱硝装置を有するボイラ用空気予熱装置
JPS6423014A (en) * 1987-07-15 1989-01-25 Ishikawajima Harima Heavy Ind Control method for air preheater
US5273727A (en) * 1991-07-16 1993-12-28 Energy Conservation Partnership, Ltd. Flue gas purification and production of dry ammonium bisulfites and bisulfates
JPH04136608A (ja) * 1990-09-27 1992-05-11 Mitsui Eng & Shipbuild Co Ltd 廃熱回収装置への硫酸アンモニウム塩の析出又は凝縮防止方法
JP2736962B2 (ja) * 1995-01-13 1998-04-08 株式会社日本環境アセスメントセンター 脱硝・脱硫方法及び装置
JPH0949610A (ja) * 1995-08-07 1997-02-18 Babcock Hitachi Kk 燃焼装置
JP4678107B2 (ja) * 2001-08-31 2011-04-27 株式会社Ｉｈｉ ボイラ設備
CN201524525U (zh) * 2009-09-11 2010-07-14 宇星科技发展(深圳)有限公司 Scr烟气脱硝装置
CN102003718B (zh) * 2010-11-02 2011-11-30 杨本洛 工作于第二安全区的加热炉用复合相变换热器
CN102042605B (zh) * 2011-01-27 2012-08-29 章礼道 回转式空气预热器分侧热清灰方法
CN102141253A (zh) * 2011-03-29 2011-08-03 深圳中兴节能环保股份有限公司 相变组合空气预热器
CN103162307A (zh) * 2011-12-08 2013-06-19 洛阳合纵石化工程有限公司 管式加热炉余热回收系统的一种新型流程设计方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623549A (en) * 1970-08-14 1971-11-30 Smitherm Industries Heat exchange methods and apparatus
US4044820A (en) * 1976-05-24 1977-08-30 Econo-Therm Energy Systems Corporation Method and apparatus for preheating combustion air while cooling a hot process gas
US4333517A (en) * 1979-07-10 1982-06-08 James Parro Heat exchange method using natural flow of heat exchange medium
US20120272626A1 (en) * 2009-11-25 2012-11-01 Babcock-Hitachi Kabushiki Kaisha Exhaust gas treatment device for an oxygen combustion system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108413439A (zh) * 2018-04-23 2018-08-17 华北电力科学研究院有限责任公司 调整四分仓空气预热器出口烟气温度的装置及方法
CN116928690A (zh) * 2023-07-05 2023-10-24 山东中和泰节能环保科技有限公司 相变输热式旋流预热器

Also Published As

Publication number Publication date
CN103982906A (zh) 2014-08-13
KR20160103101A (ko) 2016-08-31
JP2017501370A (ja) 2017-01-12
WO2015103823A1 (zh) 2015-07-16
JP6157757B2 (ja) 2017-07-05
KR101767365B1 (ko) 2017-08-10
CN103982906B (zh) 2016-04-06

Similar Documents

Publication Publication Date Title
US20160313076A1 (en) Air preheater and method for preventing corrosion and blockage of the same
US9476583B2 (en) Recovery system of waste heat from flue gas
CN110529872B (zh) 基于入口烟气温度通信控制的电站锅炉余热利用系统
CN103672936A (zh) 自然循环间接式烟气再热器
CN103512412A (zh) U形热管换热元件及与静电除尘器一体化的u形热管换热器
CN110748912B (zh) 基于烟温通信控制阀门的电站锅炉余热利用系统
CN109959025B (zh) 一种智能通信控制的电站锅炉余热利用系统
CN105841180A (zh) 一种卧式相变烟气余热回收双效加热系统及其控制方法
CN205191619U (zh) 一种热管换热器
CN209431457U (zh) 一种具有自动清灰和强化传热功能的锅炉空气预热器
US9291348B2 (en) Flue gas reheater
CN103994458A (zh) 适用于火电机组的复合相变换热器
CN102345997B (zh) 用于烟气换热器的防露点腐蚀方法
CN204943544U (zh) 一种扰流子-铸铁管组合式空气预热器
CN110748913B (zh) 基于蓄热空气温度通信控制的电站锅炉余热利用系统
CN110410816B (zh) 一种智能通信控制风机运行的电站锅炉余热利用系统
CN204043443U (zh) 烟气冷却器
CN202599176U (zh) 搪瓷热管换热器
CN202902330U (zh) 加热炉用抗腐蚀型空气预热器
CN204943545U (zh) 一种热管-铸铁管组合式空气预热器
CN104315872A (zh) 兼具锅炉烟气除尘作用的锅炉烟气余热回收节能装置
CN106439782B (zh) 一种组合式锅炉烟气余热回收系统
CN103712484A (zh) 余热循环机
CN203893220U (zh) 带暖风装置的热交换器
CN103808179A (zh) 镍基钎焊径向型热管换热器

Legal Events

Date Code Title Description
AS Assignment

Owner name: HOTANT THERMAL TECHNOLOGY (JIANGSU) CO., LTD., CHI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:QIAN, XUELUE;LIU, MAOLING;HE, RONGE;REEL/FRAME:039077/0895

Effective date: 20160421

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION