WO2016201740A1 - Appareil de combustion à recirculation de gaz de combustion - Google Patents

Appareil de combustion à recirculation de gaz de combustion Download PDF

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Publication number
WO2016201740A1
WO2016201740A1 PCT/CN2015/083359 CN2015083359W WO2016201740A1 WO 2016201740 A1 WO2016201740 A1 WO 2016201740A1 CN 2015083359 W CN2015083359 W CN 2015083359W WO 2016201740 A1 WO2016201740 A1 WO 2016201740A1
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WO
WIPO (PCT)
Prior art keywords
air inlet
wall
combustion
flue gas
combustion chamber
Prior art date
Application number
PCT/CN2015/083359
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English (en)
Chinese (zh)
Inventor
裴韩佶
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裴韩佶
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Publication date
Application filed by 裴韩佶 filed Critical 裴韩佶
Publication of WO2016201740A1 publication Critical patent/WO2016201740A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F23B40/04—Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed from below through an opening in the fuel-supporting surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B60/00—Combustion apparatus in which the fuel burns essentially without moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B80/00—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
    • F23B80/02—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel by means for returning flue gases to the combustion chamber or to the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F23J1/06—Mechanically-operated devices, e.g. clinker pushers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/10—Under-feed arrangements
    • F23K3/14—Under-feed arrangements feeding by screw

Definitions

  • the present invention relates to a heat utilization device, and more particularly to a combustion heat energy utilization device.
  • the coal-fired boiler in the prior art generally comprises two kinds of fire tube boilers and water tube boilers, and the structure mainly comprises a furnace body, the furnace body is provided with a furnace, the burner is connected with a burner and a fan, and the burner is sprayed into the furnace.
  • the pulverized coal is mixed with the air supplied by the fan, and the generated heat energy is transferred to the water, which can be used to produce steam or hot water.
  • the disadvantages are as follows: First, in the prior art boiler, the combustion material is directly burned in the furnace, and the space for storing water and the space for combustion need to be integrally manufactured, so that the volume of the furnace body is large; secondly, due to fuel The fluctuation of supply and intake air volume causes the furnace body to vibrate during combustion, which makes the fixing of the thermal insulation material difficult; thirdly, the combustion conditions are harsh, and the particle size of the coal powder is high; fourthly, the slag after combustion Can not automatically slag, need manual cleaning, not easy to run management. Fifth, existing boilers generally cannot burn waste such as straw and residual oil.
  • the object of the present invention is to provide a flue gas recirculation and combustion device, which can burn waste such as straw, residual oil and domestic garbage, can efficiently supply hot flue gas, and the fuel is automatically supplied, can automatically discharge slag, and can Improve thermal energy utilization and efficiency.
  • a flue gas recirculation combustion apparatus comprising a furnace body having a combustion chamber, a flue gas passage at the top of the combustion chamber, and a combustion tray at the bottom of the combustion chamber.
  • the bottom is provided with a vertical feeding device, the inlet of the vertical feeding device is connected with the outlet of the horizontal feeding device, the inlet of the horizontal feeding device is provided with a feeding hopper, and the outlet of the vertical feeding device is upwardly passed through the combustion tray to be burned
  • the side wall of the combustion chamber is composed of an inner wall and an outer wall, and a spiral water pipe is arranged outside the inner wall, and an air inlet passage is left between the inner wall and the outer wall, and a plurality of air inlet nozzles are arranged on the inner wall corresponding to the air inlet passage, and the air inlet nozzle a gap passing through the spiral water pipe is connected to the air inlet passage and the combustion chamber; the air inlet passage is provided with a transverse partition plate to divide the air inlet passage into an upper
  • the material for combustion is fed into the combustion chamber through the horizontal feeding device and the vertical feeding device.
  • the combustible material is ignited by the ignition burner and can be continuously burned, and the combustion oxygen is supported from the upper air.
  • the passage and the lower inlet passage are supplied, and are injected into the combustion chamber through the upper inlet nozzle and the lower inlet nozzle, and the high temperature flue gas rises after combustion.
  • an air medium heat exchanger can be installed in the flue gas passage to produce hot water or steam.
  • the water in the spiral water pipe is heated, and the hot water can be preheated, and the air in the upper air inlet passage can also be preheated, thereby improving the heat utilization efficiency.
  • the lower inlet fan can obtain oxygen from the two channels for feeding into the combustion chamber, one way is to directly extract air from the atmosphere, and is injected into the combustion chamber through the lower inlet nozzle; the other way extracts part of the flue gas after combustion from the flue gas passage, the smoke There is also some partially incompletely burned oxygen in the gas. Because of the high temperature of the flue gas, it can provide a high-temperature environment for burning combustible materials, which can further help the material with large water content to burn spontaneously. In addition, two winds can be mixed into the air.
  • the device can utilize the combustible wastes such as straw, residual oil and plastic to produce hot flue gas, which reduces pollution on the one hand and reuses heat energy on the other hand, which changes the structure of the traditional boiler.
  • the beneficial effects are as follows: First, the volume of the furnace body is small, the arrangement is flexible, and the thermal efficiency is high; secondly, the vibration of the furnace body during combustion does not affect the heat exchanger portion; Third, it can automatically supply fuel; Fourth, the slag after combustion can be automatically discharged, no need to manually clean the slag in the combustion chamber, and the operation and management are convenient.
  • the device can burn coal powder, coal, biomass fuel, residual oil, straw and other combustible solid waste, and can provide high temperature flue gas to the subsequent heat exchanger. It can be used to treat a variety of combustible waste.
  • the outer wall and the inner wall are coaxially arranged in a cylindrical shape, and the upper end of the combustion chamber is connected to the flue gas passage through the reduced diameter throat, and the outer wall is connected to the outer side of the reduced diameter throat to be provided with a steady flow.
  • the cavity and the steady flow cavity correspond to the upper end of the upper air inlet passage, and the cavity area of the steady flow cavity gradually decreases from the top to the bottom in the horizontal section.
  • the reduced diameter throat has the function of slowing and blocking the flue gas to ensure that the flue gas is fully combusted in the combustion chamber to reduce the discharge and improve the thermal efficiency; the steady flow chamber acts as a stable air flow, so that the airflow supplied by the upper fan can be balanced downward. Supply to each upper air inlet nozzle.
  • the air blowing axis of the upper air inlet nozzle is distributed in a spiral shape, and the air blowing axis of the lower air inlet nozzle faces the combustion tray. It is also possible that the air blowing axes of the upper air inlet nozzle and the lower air inlet nozzle are in the same swirling distribution.
  • the airflow from the lower inlet nozzle is directly blown toward the combustion tray or enters into a swirling flow to support the initial combustion.
  • the upper inlet nozzle sprays a swirling airflow to drive the flue gas to rotate, so as to ensure that the hot flue gas is in the combustion chamber.
  • the long residence time allows the incompletely combusted material in the flue gas to burn sufficiently, on the one hand to reduce emissions and on the other hand to make full use of thermal energy.
  • the ratio of the height occupied by the upper air inlet passage to the overall height of the lower air inlet passage in the height direction of the combustion chamber is (1:1) to (3:1). This solution takes into account the ratio of the initial combustion air to the full combustion air, making the combustion more thorough.
  • the slagging device includes a slag discharge pipe corresponding to the slag discharge gap, and a slag discharge mechanism is connected to the bottom of the slag discharge pipe; the driven gear and the driven gear are arranged on the upper side of the slag discharge pipe Rotatable mounted on vertical feed
  • the driven gear is provided with a slag hole corresponding to the slag discharging pipe
  • the lower side of the driven gear is provided with a scraping plate
  • the driven gear meshes with the driving gear driven by the motor.
  • an auxiliary burner is further connected to the combustion chamber, and the auxiliary burner is disposed at an upper portion of the combustion chamber side.
  • Figure 1 is a schematic view of the structure of the present invention.
  • Figure 2 is a schematic diagram of the working principle of the upper inlet nozzle.
  • Figure 3 is a schematic diagram of the operation of the lower inlet nozzle.
  • 1 row slag mechanism 1 row slag mechanism, 2 rows of slag pipes, 3 vertical feeding devices, 4 bottom inlet fans, 5 bearings, 6 driven gears, 7 drive gears, 8 rows of slag gaps, 9 ignition burners, 10 combustion trays, 11 Spiral water pipe, 12 upper air inlet nozzle, 13 inner wall, 14 combustion chamber, 15 outer wall, 16 upper fan, 17 reduced diameter throat, 18 flue gas passage, 19 steady flow chamber, 20 upper inlet passage, 21 auxiliary burner, 22 lateral Partition, 23 lower air inlet, 24 lower air inlet nozzle, 25 lower inlet fan, 26 bottom air chamber, 27 slag hole, 28 scraping board, 29 feeding hopper, 30 horizontal feeding device, 31 beside the flue gas Through the pipe.
  • FIG. 1 it is a flue gas recirculation combustion device, comprising a furnace body, a combustion chamber 14 is arranged in the furnace body, a flue gas passage 18 is arranged on the top of the combustion chamber 14 , and a combustion tray is arranged at the bottom of the combustion chamber 14 .
  • the bottom of the furnace body is provided with a vertical feeding device 3, the inlet of the vertical feeding device 3 is connected with the outlet of the horizontal feeding device 30, the inlet of the horizontal feeding device 30 is provided with a feeding hopper 29, and the vertical feeding device 3
  • the outlet is turned up through the combustion tray 10 to close the combustion chamber 14;
  • the side wall of the combustion chamber 14 is composed of an inner wall 13 and an outer wall 15, a spiral water pipe 11 is disposed outside the inner wall 13, and an air inlet is left between the inner wall 13 and the outer wall 15.
  • a plurality of air inlet nozzles are arranged on the inner wall 13 corresponding to the air inlet passage, and the air inlet nozzle passes through the gap of the spiral water pipe 11 to connect the air inlet passage and the combustion chamber 14; the horizontal air partition 22 is provided in the air inlet passage
  • the inlet passage is divided into an upper inlet passage 20 and a lower inlet passage 23, and in the height direction of the combustion chamber 14, the ratio of the height occupied by the upper inlet passage 20 to the height occupied by the lower inlet passage 23 is (1:1). ) ⁇ (3:1).
  • the air inlet nozzle is also divided into an upper air inlet nozzle 12 corresponding to the upper air inlet passage 20 and a lower air inlet nozzle 24 corresponding to the lower air inlet passage 23; the air blowing axis of the upper air inlet nozzle 12 and the lower air inlet nozzle 24 is rotated
  • the same swirling distribution may be such that the air blowing axis of the upper air inlet nozzle 12 is swirled, and the air blowing axis of the lower air inlet nozzle 24 is directed toward the combustion tray 10.
  • the upper portion of the outer wall 15 is provided with an upper fan 16 for connecting the upper air inlet passage 20; the lower portion of the outer wall 15 is provided with a lower inlet fan 25 for connecting the lower air inlet passage 23; the air inlet of the lower inlet fan 25 is connected to the outside atmosphere, and the other is
  • the flue gas bypass pipe 31 is disposed on the flue gas passage 18; the furnace body is further provided with an ignition burner 9 penetrating the outer wall 15 and the inner wall 13; the outer periphery of the combustion tray 10 is provided with a slag discharge gap 8, and the slag discharge gap 8 is below Connect Slag discharge device.
  • An auxiliary burner 21 is also connected to the combustion chamber 14, and the auxiliary burner 21 is disposed at an upper portion of the combustion chamber 14.
  • the outer wall 15 and the inner wall 13 are coaxially arranged in a cylindrical shape.
  • the upper end of the combustion chamber 14 is connected to the flue gas passage 18 via the reduced-diameter throat 17, and the inner wall 13 is connected to the outer side of the reduced-throat throat 17 to be provided with a constant flow chamber 19
  • the steady flow chamber 19 corresponds to the upper end of the upper air inlet passage 20, and the constant flow chamber 19 gradually decreases in the horizontal section from the top to the bottom.
  • a bottom air chamber 26 is disposed on the lower side of the combustion tray 10.
  • the combustion tray 10 is provided with a plurality of air inlet holes for opening the bottom air chamber 26 and the combustion chamber 14, and a bottom inlet fan 4 is disposed below the bottom air chamber 26. .
  • the specific structure of the slagging device is as follows: the slag discharge pipe 2 is disposed corresponding to the slag discharge gap 8, and the slag discharge mechanism 1 is connected to the bottom of the slag discharge pipe 2; the driven gear 6 is disposed on the upper side of the slag discharge pipe 2 The driven gear 6 is rotatably mounted on the outer side of the vertical feeding device 3 via the bearing 5, the driven gear 6 is provided with a slag hole 27 corresponding to the slag discharging pipe 2, and the lower side of the driven gear 6 is provided with scraping slag The plate 28, the driven gear 6 meshes with the drive gear 7 driven by the motor.
  • the material for combustion is supplied from the feed hopper 29, and is fed into the combustion chamber 14 through the horizontal feed device 30 and the vertical feed device 3, and in the combustion chamber 14, the combustible material is ignited by the burner 9 After ignition, the combustion can be continued, and the ignition burner 9 can also work for a long time to realize auxiliary combustion.
  • the auxiliary burner 21 can also realize auxiliary combustion, and the auxiliary combustion is mainly used for materials with low calorific value.
  • the oxygen supporting the combustion is supplied from the upper inlet passage 20 and the lower inlet passage 23, and is injected into the combustion chamber 14 through the upper inlet nozzle 12 and the lower inlet nozzle 24, and a high temperature flue gas rises after combustion to enter the flue gas passage 18
  • An aqueous medium heat exchanger may be provided in the flue gas passage 18 for producing hot water or steam. When there is too much slag generated after combustion, it will fall from the edge of the combustion tray 10. When the driven gear 6 rotates, the scraper plate 28 scrapes the slag into the slag discharge pipe 2, and the slag discharge mechanism 1 automatically discharges the slag.
  • the water in the spiral water pipe 11 is heated, preheated water can be preheated, or steam can be directly produced, and the air in the upper air inlet passage 20 can also be preheated, thereby improving the heat utilization efficiency.
  • the lower inlet fan 25 can obtain oxygen from two channels for feeding into the combustion chamber 14, one for directly extracting air from the atmosphere, and the lower air inlet nozzle 24 for injecting into the combustion chamber 14; the other for extracting the burned portion from the flue gas passage 18 Flue gas, which also contains some unburned oxygen. Because of the high temperature of the flue gas, it can provide a high-temperature environment for combustible materials to support combustion, which can further help the self-combustion of materials with large water content to realize flue gas recycling.
  • the device can burn coal powder, coal, biomass fuel, residual oil, straw and other combustible solid waste to produce hot flue gas, hot water or steam, on the one hand reduce pollution, on the other hand, can reuse heat energy, It changed the structure of a conventional boiler. High temperature flue gas can be supplied to the subsequent heat exchanger.
  • the unit can be used to treat a variety of combustible wastes and can be used as a waste incinerator.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Supply (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

L'invention concerne un appareil de combustion à recirculation de gaz de combustion, lequel appareil comprend un corps de four, une chambre de combustion (14) étant disposée à l'intérieur du corps de four, un canal de gaz de fumée (18) étant disposé à la partie supérieure de la chambre de combustion (14), un plateau de combustion (10) étant disposé en bas à l'intérieur de la chambre de combustion (14), et des dispositifs de sortie horizontal et vertical (30, 3) étant disposés en bas du corps de four ; la paroi latérale de la chambre de combustion (14) est constituée par une paroi interne (13) et une paroi externe (15), un tuyau d'eau en spirale (11) étant disposé à l'extérieur de la paroi interne (13), des canaux d'entrée d'air (20, 23) étant réservés entre la paroi interne (13) et la paroi externe (15), de multiples buses d'entrée d'air (12, 24) correspondant aux canaux d'entrée d'air (20, 23) étant disposés dans la paroi interne (13), et les buses d'entrée d'air (12, 24) traversant les espaces du tuyau d'eau en spirale (11) et communiquant avec les canaux d'entrée d'air (20, 23) et la chambre de combustion (14) ; des plaques de partition transversales (22) sont disposées dans les canaux d'entrée d'air (20, 23) ; un ventilateur d'entrée d'air supérieur (16) communiquant avec le canal d'entrée d'air supérieur (20) et un ventilateur d'entrée d'air inférieur (25) communiquant avec le canal d'entrée d'air inférieur (23) sont disposés sur la paroi externe (15) ; une entrée d'air du ventilateur d'entrée d'air inférieur (25) est reliée à l'atmosphère externe et à un canal de gaz de combustion (18) ; le corps de four comporte de plus un allumeur traversant la paroi externe (15) et la paroi interne (13) ; et un espace de décrassage (8) est réservé dans la périphérie du plateau de combustion (10), et la partie inférieure de l'espace de décrassage (8) communique avec un dispositif de décrassage. L'appareil de combustion peut être utilisé pour l'élimination de différents types de déchets combustibles, et peut délivrer un gaz de combustion à haute température pour l'échangeur thermique suivant.
PCT/CN2015/083359 2015-06-19 2015-09-18 Appareil de combustion à recirculation de gaz de combustion WO2016201740A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510343704.3A CN104930537B (zh) 2015-06-19 2015-06-19 一种烟气再循环燃烧装置
CN201510343704.3 2015-06-19

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108165728A (zh) * 2018-03-16 2018-06-15 马德凡 一种黄铜钢丝扩散炉用炉体
CN109971509A (zh) * 2019-04-15 2019-07-05 蛟河市鑫星新能源锅炉有限公司 一种气化炉
CN111944543A (zh) * 2020-09-17 2020-11-17 江苏龙冶节能科技有限公司 一种基于干熄焦循环气体的上升管荒煤气扰动方法及装置
WO2022164335A1 (fr) * 2021-01-26 2022-08-04 Сергей Иванович Дамдын Chambre de foyer avec combustion complète du charbon et des fumées
CN116146991A (zh) * 2023-04-18 2023-05-23 光大环保技术装备（常州）有限公司 逆推炉排炉自适应二次风调节系统及其工作方法

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CN105135463A (zh) * 2015-09-29 2015-12-09 裴韩佶 液压供料的可燃物焚烧热利用装置
CN106090863A (zh) * 2016-07-21 2016-11-09 浙江上能锅炉有限公司 高效节能蒸汽发生器
CN107101367A (zh) * 2017-06-07 2017-08-29 周松林 一种热水锅炉
CN109028041A (zh) * 2018-06-28 2018-12-18 广州市艾欣能能源科技有限责任公司 一种多燃点的高效锅炉
CN109695871B (zh) * 2019-01-03 2020-05-19 贝姆热能科技集团有限公司 一种基于生物质燃料的加热锅炉设备及其方法
CN110173897A (zh) * 2019-07-04 2019-08-27 广东省众骋热能科技有限公司 一种具有多级绝热结构的燃烧换热装置

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EP2549181A2 (fr) * 2011-07-20 2013-01-23 Sang Kwon Kim Appareil de combustion avec efficacité améliorée
CN203052644U (zh) * 2012-11-27 2013-07-10 东方电气集团东方锅炉股份有限公司 锅炉的配风系统
CN103429956A (zh) * 2010-11-16 2013-12-04 阿尔斯通技术有限公司 控制燃氧锅炉的热性能的设备和方法

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CN1590847A (zh) * 2003-04-01 2005-03-09 李冬雪 挥发分在封顶火焰燃烧室旋转供风燃烧的排烟回流锅炉
US20090126607A1 (en) * 2007-11-16 2009-05-21 Hong Jin Kim Combustion Apparatus For Recovering Heat
CN101839473A (zh) * 2009-03-16 2010-09-22 胡建廷 烟气循环高温空气节能环保燃烧技术
CN103429956A (zh) * 2010-11-16 2013-12-04 阿尔斯通技术有限公司 控制燃氧锅炉的热性能的设备和方法
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108165728A (zh) * 2018-03-16 2018-06-15 马德凡 一种黄铜钢丝扩散炉用炉体
CN108165728B (zh) * 2018-03-16 2023-11-24 信阳中毅智能装备有限责任公司 一种黄铜钢丝扩散炉用炉体
CN109971509A (zh) * 2019-04-15 2019-07-05 蛟河市鑫星新能源锅炉有限公司 一种气化炉
CN109971509B (zh) * 2019-04-15 2024-02-13 蛟河市鑫星新能源锅炉有限公司 一种气化炉
CN111944543A (zh) * 2020-09-17 2020-11-17 江苏龙冶节能科技有限公司 一种基于干熄焦循环气体的上升管荒煤气扰动方法及装置
WO2022164335A1 (fr) * 2021-01-26 2022-08-04 Сергей Иванович Дамдын Chambre de foyer avec combustion complète du charbon et des fumées
CN116146991A (zh) * 2023-04-18 2023-05-23 光大环保技术装备（常州）有限公司 逆推炉排炉自适应二次风调节系统及其工作方法

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CN104930537B (zh) 2017-06-20

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