WO2020006789A1 - Installation de récupération de chaleur perdue à haute efficacité et de très faible émission de poussière de fumée provenant d'une chaudière à charbon - Google Patents

Installation de récupération de chaleur perdue à haute efficacité et de très faible émission de poussière de fumée provenant d'une chaudière à charbon Download PDF

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Publication number
WO2020006789A1
WO2020006789A1 PCT/CN2018/096938 CN2018096938W WO2020006789A1 WO 2020006789 A1 WO2020006789 A1 WO 2020006789A1 CN 2018096938 W CN2018096938 W CN 2018096938W WO 2020006789 A1 WO2020006789 A1 WO 2020006789A1
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Prior art keywords
coal
heat recovery
waste heat
dust
fired boiler
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PCT/CN2018/096938
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English (en)
Chinese (zh)
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袁昭
袁世俊
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • 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
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention belongs to the field of thermoelectricity, and particularly relates to an ultra-low emission facility for coal-fired boiler smoke and dust with high-efficiency waste heat recovery.
  • the technical problem mainly solved by the present invention is to provide an ultra-low emission facility for coal-fired boiler smoke and dust with high efficiency of waste heat recovery, which can dismantle the high-altitude exhaust chimney of the original boiler, and realize ultra-low emission of smoke and dust pollution with efficient waste heat recovery.
  • the technical solution adopted by the present invention is: an ultra-low-emission facility for coal-fired boilers with high-efficiency waste heat recovery.
  • An arc-shaped flue gas condensing hood allows the steam-containing mixed soot to pass through a water-cooled spiral waste heat recovery tube array arranged under the condensing hood, reverse the stepwise full heat recovery of heat energy, and process high-temperature hot water. Cooling and cooling in the channel, the water mist condenses into condensate flowing down the edge of the condensing hood, and the solids in the smoke and dust are collected and collected after the condensate flows back.
  • the residual soot is passed through the electron negative oxygen ion dust array placed on the top of the flue gas hood. Make the coal-fired boiler smoke and dust achieve ultra-low emissions.
  • the coal-fired boiler smoke and dust ultra-low emission facility for high-efficiency waste heat recovery is constructed at a steam exhaust port of a coal-fired boiler in a wet desulfurization process, and a multi-layered stainless steel sheet structure is provided with an arc cooling cover.
  • the space around the support of the bottom cooling hood rises, enters into the double-layer cooling hood, passes through the center opening of the double-layer cooling hood, enters the third singular layer similar to the bottom structure, and is the same principle around the support of the three-layer cooling hood.
  • cooling hoods with different layers and volumes should be installed.
  • the steam soot that has been repeatedly cooled by the cooling layer is provided with a negative ion generating device at the middle opening of the double-layer. Ultra-low pollution indicators are emitted to the surrounding atmosphere.
  • the above-mentioned ultra-low-emission facility for coal-fired boilers with high-efficiency waste heat recovery has a spiral-shaped waste heat recovery tube array composed of metal tap water pipes arranged in the lower part of each cooling layer, and a multi-layer spiral-shaped waste heat recovery tube array is connected in series. It is connected with the soot rising direction to form a stepped temperature rise full waste heat recovery device, so that the low-temperature tap water in the pipe can be efficiently exchanged with high-temperature hot water for production or living.
  • An ultra-low emission facility for coal-fired boiler smoke and dust with high-efficiency waste heat recovery which changes the structure and technology of the original high-altitude chimney structure, and realizes ultra-low emission of dust pollution from coal-fired boilers.
  • An ultra-low-emission facility for coal-fired boilers with high-efficiency waste heat recovery which reduces the emission of heat and dust from coal-fired enterprises, so that the boiler waste heat can be efficiently and fully recovered.
  • Fig. 1 is a schematic diagram of the cross-section structure of a four-layer cooling hood embodiment of a coal-fired boiler with ultra-low emission facilities for efficient waste heat recovery.
  • Figure 2 is a schematic diagram of the top-view structure principle of a coal-fired boiler with ultra-low emission facilities for efficient waste heat recovery.
  • Figure 3 is a schematic diagram of the principle of smoke and dust in a coal-fired boiler with ultra-low emission facilities for efficient waste heat recovery.
  • FIG. 4 is a schematic diagram of a series connection structure of a spiral waste heat recovery tube array composed of tap water pipes in a coal-fired boiler ultra-low emission facility for efficient waste heat recovery.
  • An ultra-low emission facility for coal-fired boilers with high efficiency waste heat recovery is centered on the lower exhaust port connected to the coal-fired boiler in the wet desulfurization process.
  • Build an arc-shaped flue gas condensing hood so that the steam-containing mixed soot is controlled by a water-cooled spiral waste heat recovery tube array arranged under the condensing hood, reverse stepped full heat recovery of heat energy, processing high-temperature hot water, and the soot is passed through a multilayer condensing hood in a specific Cooling and cooling in the channel, the water mist condenses into condensate and flows down the edge of the condensing hood.
  • the solids in the smoke and dust are collected with the condensate refluxing and collected.
  • the residual soot is passed through the electronic negative oxygen ion dusting device placed on the top of the flue gas condensing hood. 6. Make the coal-fired boiler smoke and dust achieve ultra-low emissions.
  • the coal-fired boiler smoke and dust ultra-low emission facility for high-efficiency waste heat recovery is constructed at a steam exhaust port of a coal-fired boiler in a wet desulfurization process, and a multi-layered stainless steel sheet structure is provided with an arc cooling cover.
  • the space around the support 15 of the bottom cooling hood rises, enters into the double cooling hood, passes through the center opening of the double cooling hood, and enters into the singular third layer similar to the bottom structure. 15 The surrounding space rises.
  • cooling hoods with different layers and volumes should be set according to the requirements of coal-fired boiler power and emission indicators.
  • the steam smoke and dust that has been repeatedly cooled by the cooling layer is provided with a negative ion generating device 6 at the middle opening of the double-layer. After dust removal and filtering again, Discharge to the surrounding atmosphere with ultra-low pollution indicators.
  • the above-mentioned ultra-low emission facility for coal-fired boilers with high-efficiency waste heat recovery is arranged close to the lower part of each cooling layer, and controls a spiral waste heat recovery tube array composed of metal tap water pipes, and a multilayer spiral waste heat recovery tube array. It is connected in series to form a stepped temperature rise full waste heat recovery device in the opposite direction to the rising direction of smoke and dust, so that the low-temperature tap water in the pipe can be efficiently exchanged with high-temperature hot water for production or domestic use.
  • FIG. 1 is a high-efficiency waste heat recovery coal-fired boiler soot emission ultra-low emission facility, which is a hoisting type embodiment composed of building materials such as pillars 11, fixed cables 12, brackets 15, four-layer cooling hood, and a schematic cross-sectional structural principle.
  • the detailed description of the working principle is as follows: In industrial coal-fired boilers using wet flue gas desulfurization technology forcibly oxidized by limestone, such as the largest coal-fired thermal power company, the original high altitude is removed.
  • the original smoke and dust input chimney discharge port is connected to the external smoke inlet 17, the steam smoke and dust enters the internal smoke inlet 14, and the smoke and dust diffuse freely in the d cooling cover 5 and the brackets around the d cooling cover 5 15
  • the space above the ground rises upward, enters the lower closed c cooling hood 4, and the soot that continues to rise gathers at the opening in the middle of the c cooling hood 4 and enters the b-layer cooling hood 3.
  • the soot enters the state similar to the d cooling hood layer 5.
  • the a-layer cooling hood 2 is finally discharged into the atmosphere through the negative ion electronic dust removal device 6 at the center opening of the a-layer cooling hood 2. Refer to the smoke operation direction indicator 16 of FIG. 3 for the principle of the entire soot movement.
  • Figure 4 is a schematic diagram of a series connection structure of a spiral waste heat recovery tube array consisting of tap water pipes for a coal-fired boiler with ultra-low emission facilities for efficient waste heat recovery.
  • waste heat recovery water outlet 18, waste heat recovery water inlet 19, and waste heat recovery tube array Refer to waste heat recovery water outlet 18, waste heat recovery water inlet 19, and waste heat recovery tube array.
  • the three-layer combined waste heat recovery device of the b-layer spiral 8 waste heat recovery tube array, the c-layer spiral waste heat recovery tube array 9, and the d-layer spiral waste heat recovery tube array 10 is connected in series as shown in the figure
  • the reverse step heat transfer method is used to convert low-temperature tap water from the city into high-temperature hot water for hot water for production and domestic use.
  • the steam-containing smoke and dust passing through the step heat exchange is converted into dust-containing condensation under the effect of multi-stage cooling. Water flows down the inner and outer walls of the stainless steel plate with an arc-shaped structure, and is uniformly settled by the condensate recovery device on the

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chimneys And Flues (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

L'invention concerne une installation de récupération de chaleur perdue à haute efficacité et de très faible émission de poussière de fumée provenant d'une chaudière à charbon centrée sur une sortie de fumée inférieure reliée à la chaudière à charbon à l'aide d'un procédé de traitement de désulfuration par voie humide, au-dessus duquel des couvercles de condensation de gaz de combustion en forme de dôme (2, 3, 4, 5) sont construits de telle sorte que la poussière de fumée contenant un mélange de vapeur passe à travers un réseau de tubes de récupération de chaleur perdue en spirale refroidi à l'eau (8, 9, 10) réparti au-dessous des couvercles de condensation (2, 3, 4, 5), l'énergie thermique étant récupérée en chaleur totale d'une manière inversée et progressive et étant utilisée pour générer de l'eau chaude à haute température ; la poussière de fumée est refroidie au moyen de couvercles de condensation multicouches (2, 3, 4, 5), dans un canal spécifique, un brouillard d'eau est condensé en eau condensée qui s'écoule le long des bords des couvercles de condensation (2, 3 4, 5), la matière solide dans la poussière de fumée est traitée de manière centralisée et unifiée après avoir été chauffée et collectée conjointement avec l'eau condensée, puis la poussière de fumée résiduelle passe à travers un dispositif électronique de réduction de poussière à ions négatifs d'oxygène (6) placé sur la couche supérieure des couvercles de condensation de gaz de combustion (2, 3 4, 5) de telle sorte qu'une émission ultrafaible de poussière de fumée provenant de la chaudière à charbon est obtenue.
PCT/CN2018/096938 2018-07-03 2018-07-25 Installation de récupération de chaleur perdue à haute efficacité et de très faible émission de poussière de fumée provenant d'une chaudière à charbon Ceased WO2020006789A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810720440.2A CN108771939A (zh) 2018-07-03 2018-07-03 一种高效余热回收的燃煤锅炉烟尘超低排放设施
CN201810720440.2 2018-07-03

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WO2020006789A1 true WO2020006789A1 (fr) 2020-01-09

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Publication number Priority date Publication date Assignee Title
CN112944902B (zh) * 2021-02-01 2023-05-30 湖北中超化工科技有限公司 一种便于余温再利用的烧结炉及其利用方法
JP7594480B2 (ja) 2021-03-26 2024-12-04 株式会社フジタ 廃熱利用システム
CN113058392B (zh) * 2021-04-14 2024-11-22 中国华能集团清洁能源技术研究院有限公司 一种水回收系统及方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4662899A (en) * 1985-04-05 1987-05-05 American Environmental International Inc. Air pollution control system method and apparatus
CN201688425U (zh) * 2010-03-23 2010-12-29 陈兆红 一种净化烟气的装置
CN102261852A (zh) * 2011-06-30 2011-11-30 西安交通大学 一种石灰窑余热回收装置的结构
CN205448333U (zh) * 2016-02-17 2016-08-10 北京葆蓝科技有限公司 一种低氮全预混回水冷凝预热的纯铜锅炉
CN106594772A (zh) * 2016-12-22 2017-04-26 洛阳文森科技有限公司 一种燃煤工业锅炉终端超低排放方案
CN108119905A (zh) * 2018-02-01 2018-06-05 营口绿源锅炉有限责任公司 燃气锅炉的自动降雾霾烟囱

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4662899A (en) * 1985-04-05 1987-05-05 American Environmental International Inc. Air pollution control system method and apparatus
US4662899B1 (fr) * 1985-04-05 1990-01-16 American Environmental Interna
CN201688425U (zh) * 2010-03-23 2010-12-29 陈兆红 一种净化烟气的装置
CN102261852A (zh) * 2011-06-30 2011-11-30 西安交通大学 一种石灰窑余热回收装置的结构
CN205448333U (zh) * 2016-02-17 2016-08-10 北京葆蓝科技有限公司 一种低氮全预混回水冷凝预热的纯铜锅炉
CN106594772A (zh) * 2016-12-22 2017-04-26 洛阳文森科技有限公司 一种燃煤工业锅炉终端超低排放方案
CN108119905A (zh) * 2018-02-01 2018-06-05 营口绿源锅炉有限责任公司 燃气锅炉的自动降雾霾烟囱

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