WO2016201740A1 - Flue gas recirculation combustion apparatus - Google Patents

Flue gas recirculation combustion apparatus 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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WIPO (PCT)
Prior art keywords
air inlet
combustion
flue gas
combustion chamber
passage
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PCT/CN2015/083359
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French (fr)
Chinese (zh)
Inventor
裴韩佶
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裴韩佶
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Priority to CN201510343704.3 priority Critical
Priority to CN201510343704.3A priority patent/CN104930537B/en
Application filed by 裴韩佶 filed Critical 裴韩佶
Publication of WO2016201740A1 publication Critical patent/WO2016201740A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F23B40/04Combustion 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B60/00Combustion apparatus in which the fuel burns essentially without moving
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B80/00Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
    • F23B80/02Combustion 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00Removing ash, clinker, or slag from combustion chambers
    • F23J1/06Mechanically-operated devices, e.g. clinker pushers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/10Under-feed arrangements
    • F23K3/14Under-feed arrangements feeding by screw

Abstract

Provided is a flue gas recirculation combustion apparatus, comprising a furnace body, wherein a combustion chamber (14) is provided inside the furnace body, a flue gas channel (18) is provided at the top of the combustion chamber (14), a combustion tray (10) is provided at the bottom inside the combustion chamber (14), and horizontal and vertical feeding devices (30, 3) are provided at the bottom of the furnace body; the side wall of the combustion chamber (14) is formed of an inner wall (13) and an outer wall (15), a spiral water pipe (11) is provided outside the inner wall (13), air inlet channels (20, 23) are reserved between the inner wall (13) and the outer wall (15), multiple air inlet nozzles (12, 24) corresponding to the air inlet channels (20, 23) are provided in the inner wall (13), and the air inlet nozzles (12, 24) pass through the gaps of the spiral water pipe (11) and communicate with the air inlet channels (20, 23) and the combustion chamber (14); transverse partition plates (22) are provided in the air inlet channels (20, 23); an upper air inlet fan (16) communicating with the upper air inlet channel (20) and a lower air inlet fan (25) communicating with the lower air inlet channel (23) are provided on the outer wall (15); an air inlet of the lower air inlet fan (25) is connected with the outside atmosphere and a flue gas channel (18); the furnace body is further provided with an igniter passing through the outer wall (15) and the inner wall (13); and a deslagging gap (8) is reserved in the periphery of the combustion tray (10), and the lower portion of the deslagging gap (8) communicates with a deslagging device. The combustion apparatus can be used for the disposal of various types of combustible waste, and can provide a high-temperature flue gas for the subsequent heat exchanger.

Description

一种烟气再循环燃烧装置Flue gas recirculation combustion device 技术领域Technical field
本发明涉及一种热利用装置,特别涉及一种燃烧热能利用装置。The present invention relates to a heat utilization device, and more particularly to a combustion heat energy utilization device.
背景技术Background technique
现有技术中的燃煤锅炉,一般包括火管锅炉和水管锅炉两种,其结构主要包括炉体,炉体内设有炉膛,炉体上连接有燃烧器和风机,燃烧器向炉膛内喷入煤粉,与风机供入的空气混合燃烧,产生的热能传递给水,可用于生产蒸汽或热水。其不足之处在于:其一,现有技术中的锅炉,燃烧物质直接在炉膛内燃烧,需要将储水的空间及燃烧的空间一体制造,使得炉体的体积较大;其二,由于燃料供应和进风量的波动,导致炉体在燃烧时振动大,从而使得保温材料的固定比较困难;其三,其燃烧条件苛刻,对煤粉的粒度有较高要求;其四,燃烧后的炉渣不能自动出渣,需要人工清理,不便于运行管理。其五,现有的锅炉一般不能燃烧秸秆、渣油等废弃物。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.
发明内容Summary of the invention
本发明的目的是提供一种烟气再循环燃烧装置,使其能燃烧秸秆、渣油、生活垃圾等废弃物,可高效供应热烟气,其燃料自动供入,可自动排渣,并能提高热能利用和效率。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.
本发明的目的是这样实现的:一种烟气再循环燃烧装置,包括炉体,炉体内设有燃烧室,所述燃烧室顶部设有烟气通道,燃烧室内底部设有燃烧托盘,炉体底部设有垂直供料装置,所述垂直供料装置的进口与水平供料装置出口相连,水平供料装置的进口设有进料斗,垂直供料装置的出口向上穿过燃烧托盘接通燃烧室;所述燃烧室的侧壁由内壁和外壁构成,内壁外设有螺旋水管,内壁和外壁之间留有进风通道,内壁上与进风通道对应设有若干进风喷嘴,进风喷嘴穿过螺旋水管的间隙接通进风通道和燃烧室;所述进风通道内设有横向隔板将进风通道分隔成上进风通道和下进风通道,所述进风喷嘴也分为与上进风通道对应的上进风喷嘴和与下进风通道相对应的下进风喷嘴;所述外壁上部设有接通上进风通道的上进风机;所述外壁下部设有接通下进风通道的下进风机;下进风机的进风口一路连接外界大气,另一路与烟气通道上设置的烟气旁通管相连;炉体上还设有贯穿外壁和内壁的点火燃烧器;燃烧托盘外周留有排渣间隙,排渣间隙下方接通排渣装置。The object of the present invention is achieved by 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 air inlet passage and a lower air inlet passage, and the air inlet nozzle is also divided into An upper air inlet nozzle corresponding to the upper air inlet passage and a lower air inlet nozzle corresponding to the lower air inlet passage; the upper portion of the outer wall is provided with an upper inlet fan connecting the upper inlet air passage; and the lower portion of the outer wall is provided with a lower inlet air passage The inlet fan is connected to the outside air, and the other is connected to the flue gas bypass pipe provided on the flue gas passage; the furnace body is also provided with an ignition burner penetrating the outer wall and the inner wall; There is a slag discharge gap, and the slagging device is connected below the slag discharge gap.
本发明工作时,用于燃烧的物料通过水平供料装置和垂直供料装置后向燃烧室内供料,在燃烧室内,可燃物料被点火燃烧器点燃后可持续燃烧,支持燃烧的氧气从上进风通道和下进风通道供入,并经上进风喷嘴和下进风喷嘴喷入燃烧室,燃烧后形成高温的烟气上升, 进入烟气通道;在烟气通道内可设置水介质换热器,用来生产热水或蒸汽。燃烧后产生的炉渣过多时,会从燃烧托盘边缘落下,并进一步从排渣装置排出。在燃烧过程中,螺旋水管内的水被加热,可以预热水,上进风通道内的空气也可被预热,提高了热利用效率。下进风机可以从两路获得氧气供入燃烧室,一路是直接从大气中抽取空气,经下进风喷嘴喷入燃烧室;另一路从烟气通道内抽取燃烧后的部分烟气,该烟气中也有部分未充分燃烧的氧气,由于该烟气温度较高,可为可燃物料提供支持燃烧的高温环境,能进一步帮助含水量大的物料自主燃烧,此外,还可以将两路风混合进入,既提高了进风温度,又具有足够多的氧气,可以改善燃烧环境。该装置可利用可秸秆、渣油、塑料等可燃废弃物产出热烟气,一方面减少了污染,另一方面能将热能再利用,其改变了传统锅炉的结构。与现有技术相比,其有益效果在于:其一,炉体的体积较小,布置灵活,热效率高;其二,炉体在燃烧时的振动,不会对换热器部分产生影响;其三,能够自动供入燃料;其四,燃烧后的炉渣可自动出渣,无需人工清理燃烧室内的炉渣,运行管理方便。其五,能够预热空气和水,有效地减少了炉体向外散热,同时,在进风通道有冷却作用下,使得炉体外壁无需设置保温层或只需设置较薄的保温层,可以大量节省炉体保温材料。该装置可烧煤粉、煤块、生物质燃料、渣油、秸秆以及其他可燃固体废弃物,可提供高温烟气给后续的换热器。其可用于处理多种可燃废弃物。In the working of the invention, the material for combustion is fed into the combustion chamber through the horizontal feeding device and the vertical feeding device. In the combustion chamber, 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. Enter the flue gas passage; an air medium heat exchanger can be installed in the flue gas passage to produce hot water or steam. When there is too much slag generated after combustion, it will fall from the edge of the combustion tray and be further discharged from the slag discharge device. During the combustion process, 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. It not only increases the inlet air temperature, but also has enough oxygen to improve the combustion environment. 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. Compared with the prior art, 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. Fifthly, it can preheat the air and water, effectively reducing the external heat dissipation of the furnace body. At the same time, under the cooling effect of the air inlet passage, the outer wall of the furnace does not need to be provided with an insulation layer or only a thin insulation layer can be provided. A lot of savings in furnace insulation. 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.
作为本发明的进一步改进,所述外壁和内壁呈同轴设置的圆筒形,燃烧室的上口经缩径喉口接通烟气通道,内壁连接缩径喉口位置的外侧设有稳流腔,稳流腔与上进风通道上端相对应,稳流腔在水平断面上空腔面积从上至下逐渐减小。缩径喉口有缓流和闭锁烟气的作用,保证烟气在燃烧室内充分燃烧,以降低排放和提高热效率;稳流腔起稳定气流的作用,使上进风机供入的气流能均衡向下供应到各上进风喷嘴。As a further improvement of the present invention, 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.
作为本发明的进一步改进在于,上进风喷嘴的喷风轴线呈漩涡状分布,下进风喷嘴的喷风轴线朝向燃烧托盘。也可以是所述上进风喷嘴和下进风喷嘴的喷风轴线呈旋向相同的漩涡状分布。其工作时,下进风喷嘴喷出的气流直接吹向燃烧托盘或呈旋流进入,支持初始燃烧,上进风喷嘴喷出旋转气流,带动烟气旋转,保证热的烟气在燃烧室内有较长的停留时间,使烟气中的未完全燃烧的物质能充分燃烧,一方面降低排放,另一方面能充分利用热能。As a further improvement of the present invention, 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. During its operation, 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.
为达到良好的燃烧效果,在燃烧室的高度方向上,上进风通道整体占据的高度与下进风通道整体占据的高度之比为(1:1)~(3:1)。该方案兼顾了初始燃烧用空气和充分燃烧用空气的比例,使得燃烧更加彻底。In order to achieve a good combustion effect, 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.
作为本发明的进一步改进,所述排渣装置包括与排渣间隙对应设置的排渣管,排渣管底部连接有排渣机构;所述排渣管上侧设有从动齿轮,从动齿轮可转动地安装在垂直供料 装置的外侧,从动齿轮上设有与排渣管对应的落渣孔,从动齿轮下侧设有刮渣板,所述从动齿轮与经电机带动的主动齿轮相啮合。从动齿轮转动时,刮渣板将炉渣刮入排渣管内,其可实现自动排渣。As a further improvement of the present invention, 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 On the outer side of the device, the driven gear is provided with a slag hole corresponding to the slag discharging pipe, and the lower side of the driven gear is provided with a scraping plate, and the driven gear meshes with the driving gear driven by the motor. When the driven gear rotates, the scraping plate scrapes the slag into the slag discharging pipe, which can realize automatic slag discharging.
作为本发明的进一步改进,所述燃烧室上还连接有辅助燃烧器,辅助燃烧器设置在燃烧室侧上部。通过辅助燃烧器的辅助燃烧,使得本装置能燃烧热值较低或水分较大的燃料。As a further improvement of the present invention, 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. By means of the auxiliary combustion of the auxiliary burner, the device is capable of burning a fuel having a lower calorific value or a larger moisture.
附图说明DRAWINGS
图1为本发明结构示意图。Figure 1 is a schematic view of the structure of the present invention.
图2为上进风喷嘴工作原理图。Figure 2 is a schematic diagram of the working principle of the upper inlet nozzle.
图3为下进风喷嘴工作原理图。Figure 3 is a schematic diagram of the operation of the lower inlet nozzle.
其中,1排渣机构,2排渣管,3垂直供料装置,4底部进风机,5轴承,6从动齿轮,7主动齿轮,8排渣间隙,9点火燃烧器,10燃烧托盘,11螺旋水管,12上进风喷嘴,13内壁,14燃烧室,15外壁,16上进风机,17缩径喉口,18烟气通道,19稳流腔,20上进风通道,21辅助燃烧器,22横向隔板,23下进风通道,24下进风喷嘴,25下进风机,26底部风腔,27落渣孔,28刮渣板,29进料斗,30水平供料装置,31烟气旁通管。Among them, 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.
具体实施方式detailed description
如图1所示,为一种烟气再循环燃烧装置,包括炉体,炉体内设有燃烧室14,所述燃烧室14顶部设有烟气通道18,燃烧室14内底部设有燃烧托盘10,炉体底部设有垂直供料装置3,所述垂直供料装置3的进口与水平供料装置30出口相连,水平供料装置30的进口设有进料斗29,垂直供料装置3的出口向上穿过燃烧托盘10接通燃烧室14;所述燃烧室14的侧壁由内壁13和外壁15构成,内壁13外设有螺旋水管11,内壁13和外壁15之间留有进风通道,内壁13上与进风通道对应设有若干进风喷嘴,进风喷嘴穿过螺旋水管11的间隙接通进风通道和燃烧室14;所述进风通道内设有横向隔板22将进风通道分隔成上进风通道20和下进风通道23,在燃烧室14的高度方向上,上进风通道20整体占据的高度与下进风通道23整体占据的高度之比为(1:1)~(3:1)。进风喷嘴也分为与上进风通道20对应的上进风喷嘴12和与下进风通道23相对应的下进风喷嘴24;上进风喷嘴12和下进风喷嘴24的喷风轴线呈旋向相同的漩涡状分布,也可以是上进风喷嘴12的喷风轴线呈漩涡状分布,下进风喷嘴24的喷风轴线直接朝向燃烧托盘10。外壁15上部设有接通上进风通道20的上进风机16;所述外壁15下部设有接通下进风通道23的下进风机25;下进风机25的进风口一路连接外界大气,另一路与烟气通道18上设置的烟气旁通管31相连;炉体上还设有贯穿外壁15和内壁13的点火燃烧器9;燃烧托盘10外周留有排渣间隙8,排渣间隙8下方接通 排渣装置。燃烧室14上还连接有辅助燃烧器21,辅助燃烧器21设置在燃烧室14侧上部。As shown in 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 . 10, 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.
外壁15和内壁13呈同轴设置的圆筒形,燃烧室14的上口经缩径喉口17接通烟气通道18,内壁13连接缩径喉口17位置的外侧设有稳流腔19,稳流腔19与上进风通道20上端相对应,稳流腔19在水平断面上空腔面积从上至下逐渐减小。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.
为进一步帮助燃烧,在燃烧托盘10下侧设有底部风腔26,燃烧托盘10上设有若干进风孔接通底部风腔26和燃烧室14,底部风腔26下方设有底部进风机4。In order to further assist combustion, 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. .
上述排渣装置的具体结构为:其包括与排渣间隙8对应设置的排渣管2,排渣管2底部连接有排渣机构1;所述排渣管2上侧设有从动齿轮6,从动齿轮6经轴承5可转动地安装在垂直供料装置3的外侧,从动齿轮6上设有与排渣管2对应的落渣孔27,从动齿轮6下侧设有刮渣板28,从动齿轮6与经电机带动的主动齿轮7相啮合。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.
工作时,用于燃烧的物料从进料斗29供入,通过水平供料装置30和垂直供料装置3后向燃烧室14内供料,在燃烧室14内,可燃物料被点火燃烧器9点燃后可持续燃烧,点火燃烧器9也可以长时间工作,实现辅助燃烧,辅助燃烧器21也可以实现辅助燃烧,辅助燃烧主要针对热值低的物料而使用。支持燃烧的氧气从上进风通道20和下进风通道23供入,并经上进风喷嘴12和下进风喷嘴24喷入燃烧室14,燃烧后形成高温的烟气上升,进入烟气通道18;在烟气通道18内可设置水介质换热器,用来生产热水或蒸汽。燃烧后产生的炉渣过多时,会从燃烧托盘10边缘落下,从动齿轮6转动时,刮渣板28将炉渣刮入排渣管2内,通过排渣机构1,将炉渣自动排出。在燃烧过程中,螺旋水管11内的水被加热,可以预热水,也可直接产出蒸汽,上进风通道20内的空气也可被预热,提高了热利用效率。下进风机25可以从两路获得氧气供入燃烧室14,一路是直接从大气中抽取空气,经下进风喷嘴24喷入燃烧室14;另一路从烟气通道18内抽取燃烧后的部分烟气,该烟气中也有部分未燃烧的氧气,由于该烟气温度较高,可为可燃物料提供支持燃烧的高温环境,能进一步帮助含水量大的物料自主燃烧,实现烟气再循环利用。此外,还可以将两路风混合进入,既提高了进风温度,又具有足够多的氧气,可以改善燃烧环境。该装置可烧煤粉、煤块、生物质燃料、渣油、秸秆以及其他可燃固体废弃物产出热烟气、热水或蒸汽,一方面减少了污染,另一方面能将热能再利用,其改变了传统锅炉的结构。可提供高温烟气给后续的换热器。该装置可用于处理多种可燃废弃物,可作为垃圾焚烧炉使用。In operation, 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. During the combustion process, 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. . In addition, it is also possible to mix two winds into the air, which not only increases the inlet air temperature, but also has enough oxygen to improve the combustion environment. 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.
发明并不局限于上述实施例,在本发明公开的技术方案的基础上,本领域的技术人员根据所公开的技术内容,不需要创造性的劳动就可以对其中的一些技术特征作出一些替换和变形,这些替换和变形均在本发明的保护范围内。 The invention is not limited to the above embodiments, and based on the technical solutions disclosed by the present invention, those skilled in the art can make some substitutions and deformations of some of the technical features without any creative labor according to the disclosed technical contents. These substitutions and modifications are all within the scope of the invention.

Claims (8)

  1. 一种烟气再循环燃烧装置,包括炉体,炉体内设有燃烧室,所述燃烧室顶部设有烟气通道,其特征在于:燃烧室内底部设有燃烧托盘,炉体底部设有垂直供料装置,所述垂直供料装置的进口与水平供料装置出口相连,水平供料装置的进口设有进料斗,垂直供料装置的出口向上穿过燃烧托盘接通燃烧室;所述燃烧室的侧壁由内壁和外壁构成,内壁外设有螺旋水管,内壁和外壁之间留有进风通道,内壁上与进风通道对应设有若干进风喷嘴,进风喷嘴穿过螺旋水管的间隙接通进风通道和燃烧室;所述进风通道内设有横向隔板将进风通道分隔成上进风通道和下进风通道,所述进风喷嘴也分为与上进风通道对应的上进风喷嘴和与下进风通道相对应的下进风喷嘴;所述外壁上部设有接通上进风通道的上进风机;所述外壁下部设有接通下进风通道的下进风机;下进风机的进风口一路连接外界大气,另一路与烟气通道上设置的烟气旁通管相连;炉体上还设有贯穿外壁和内壁的点火燃烧器;燃烧托盘外周留有排渣间隙,排渣间隙下方接通排渣装置。A flue gas recirculation combustion device comprises a furnace body, a combustion chamber is arranged in the furnace body, and a flue gas passage is arranged on the top of the combustion chamber, wherein: a combustion tray is arranged at the bottom of the combustion chamber, and a vertical supply is provided at the bottom of the furnace body. a feeding device, the inlet of the vertical feeding device is connected to 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 turned up through the combustion tray to open the combustion chamber; The side wall of the 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 passes through the spiral water pipe. The gap 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 air inlet passage and a lower air inlet passage, and the air inlet nozzle is further divided into an upper air inlet passage corresponding to the upper air inlet passage An upper inlet nozzle and a lower inlet nozzle corresponding to the lower inlet passage; the upper portion of the outer wall is provided with an upper inlet fan connecting the upper inlet passage; and the lower portion of the outer wall is provided with a lower inlet fan connecting the lower inlet passage; The air inlet of the fan is connected to the outside atmosphere all the way, and the other channel is connected with the flue gas bypass pipe provided on the flue gas passage; the furnace body is also provided with an ignition burner penetrating the outer wall and the inner wall; the slag discharge gap is left outside the combustion tray The slagging device is connected below the slag gap.
  2. 根据权利要求1所述的一种烟气再循环燃烧装置,其特征在于:所述外壁和内壁呈同轴设置的圆筒形,燃烧室的上口经缩径喉口接通烟气通道,内壁连接缩径喉口位置的外侧设有稳流腔,稳流腔与上进风通道上端相对应,稳流腔在水平断面上空腔面积从上至下逐渐减小。A flue gas recirculation combustion apparatus according to claim 1, wherein 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 via the reduced diameter throat. The outer wall of the inner wall connecting the reduced throat position is provided with a steady flow cavity, and the steady flow cavity corresponds to the upper end of the upper air inlet passage, and the cavity area of the steady flow cavity gradually decreases from top to bottom in the horizontal section.
  3. 根据权利要求1所述的一种烟气再循环燃烧装置,其特征在于:所述上进风喷嘴的喷风轴线呈漩涡状分布,下进风喷嘴的喷风轴线朝向燃烧托盘。A flue gas recirculation combustion apparatus according to claim 1, wherein the air blowing axis of said upper air inlet nozzle is distributed in a spiral shape, and the air blowing axis of said lower air inlet nozzle faces said combustion tray.
  4. 根据权利要求1所述的一种烟气再循环燃烧装置,其特征在于:所述上进风喷嘴和下进风喷嘴的喷风轴线呈旋向相同的漩涡状分布。A flue gas recirculation combustion apparatus according to claim 1, wherein the air blowing axes of said upper air inlet nozzle and said lower air inlet nozzle are in the same swirling distribution.
  5. 根据权利要求3或4所述的一种烟气再循环燃烧装置,其特征在于:在燃烧室的高度方向上,上进风通道整体占据的高度与下进风通道整体占据的高度之比为(1:1)~(3:1)。A flue gas recirculation combustion apparatus according to claim 3 or 4, wherein in the height direction of the combustion chamber, the ratio of the height occupied by the upper inlet passage as a whole to the height occupied by the lower inlet passage is ( 1:1)~(3:1).
  6. 根据权利要求1-4任意一项所述的一种烟气再循环燃烧装置,其特征在于:所述燃烧托盘下侧设有底部风腔,燃烧托盘上设有若干进风孔接通底部风腔和燃烧室,底部风腔下方设有底部进风机。A flue gas recirculation combustion apparatus according to any one of claims 1 to 4, characterized in that: a bottom wind chamber is arranged on the lower side of the combustion tray, and a plurality of air inlet holes are arranged on the combustion tray to connect the bottom wind. The chamber and the combustion chamber have a bottom inlet fan below the bottom air chamber.
  7. 根据权利要求1-4任意一项所述的一种烟气再循环燃烧装置,其特征在于:所述排渣装置包括与排渣间隙对应设置的排渣管,排渣管底部连接有排渣机构;所述排渣管上侧设有从动齿轮,从动齿轮可转动地安装在垂直供料装置的外侧,从动齿轮上设有与排渣管对应的落渣孔,从动齿轮下侧设有刮渣板,所述从动齿轮与经电机带动的主动齿轮相啮合。A flue gas recirculation combustion apparatus according to any one of claims 1 to 4, wherein the slagging device comprises a slag discharge pipe corresponding to a slag discharge gap, and a slag discharge is connected to the bottom of the slag discharge pipe a mechanism; the upper side of the slag discharge pipe is provided with a driven gear, the driven gear is rotatably mounted on the outer side of the vertical feeding device, and the driven gear is provided with a slag hole corresponding to the slag discharge pipe, and the driven gear is under the driven gear The scraper plate is provided on the side, and the driven gear meshes with the driving gear driven by the motor.
  8. 根据权利要求1-4任意一项所述的一种烟气再循环燃烧装置,其特征在于:所述燃烧室上还连接有辅助燃烧器,辅助燃烧器设置在燃烧室侧上部。 A flue gas recirculation combustion apparatus according to any one of claims 1 to 4, characterized in that the combustion chamber is further connected with an auxiliary burner, and the auxiliary burner is disposed at an upper portion of the combustion chamber side.
PCT/CN2015/083359 2015-06-19 2015-09-18 Flue gas recirculation combustion apparatus WO2016201740A1 (en)

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EP2549181A2 (en) * 2011-07-20 2013-01-23 Sang Kwon Kim Combustion apparatus with improved combustion efficiency
CN203052644U (en) * 2012-11-27 2013-07-10 东方电气集团东方锅炉股份有限公司 Air distribution system for boiler

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