WO2014201708A1 - Drying or low-temperature destructive distillation method and apparatus for brown coal or low-deterioration long flame coal - Google Patents

Drying or low-temperature destructive distillation method and apparatus for brown coal or low-deterioration long flame coal Download PDF

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WO2014201708A1
WO2014201708A1 PCT/CN2013/077926 CN2013077926W WO2014201708A1 WO 2014201708 A1 WO2014201708 A1 WO 2014201708A1 CN 2013077926 W CN2013077926 W CN 2013077926W WO 2014201708 A1 WO2014201708 A1 WO 2014201708A1
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low
drying
temperature
lignite
hot air
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PCT/CN2013/077926
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French (fr)
Chinese (zh)
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蔡京鹏
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Cai Jingpeng
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Priority to CN201310250501.0A priority patent/CN103333703B/en
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Publication of WO2014201708A1 publication Critical patent/WO2014201708A1/en

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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10FDRYING OR WORKING-UP OF PEAT
    • C10F5/00Drying or de-watering peat
    • C10F5/06Drying or de-watering peat combined with a carbonisation step for producing turfcoal
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10FDRYING OR WORKING-UP OF PEAT
    • C10F5/00Drying or de-watering peat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/02Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
    • F26B17/04Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined

Abstract

The present invention relates to a drying or low-temperature destructive distillation method and apparatus for brown coal or low-deterioration long flame coal. A tunnel type drying chamber of the method and apparatus comprises a preheating segment and a high-temperature segment, multiple exhaust ports are disposed on the top of the high-temperature segment, and multiple hot air or vapor inlets are disposed on the bottom or the side of the high-temperature segment. Multiple excessive tail gas inlets are disposed on the bottom or the side of the preheating segment, the preheating segment is in communication with the multiple exhaust ports of the high-temperature segment through an excessive tail gas exhaust pipeline of the high-temperature segment, and multiple tail gas and condensed water discharge openings are disposed on the bottom of the preheating segment. The tail gas exhausted by the high-temperature segment can be entirely or partially reheated by an external heat source generator or mixed with fresh hot air to form hot air and vapor with a necessary temperature, flow speed and flow rate to be used in drying or destructive distillation of a material, and part of the tail gas can enter the preheating segment to preheat the drying material and is exhausted after an environmental protection treatment. The method and apparatus are environmentally-friendly and easy to control, the heat of vaporization is recycled, the device is simple and the manufacturing cost is low, and mass production is easy to carry out.

Description

褐煤或低变质长焰煤的烘干或低温干馏方法及装置  Drying or low temperature dry distillation method and device for lignite or low metamorphism long flame coal 技术领域 Technical field
本发明涉及煤炭烘干领域,尤其是涉及褐煤和低变质长焰煤的烘干或低温干馏领域。The invention relates to the field of coal drying, in particular to the field of drying or low temperature dry distillation of lignite and low metamorphosed long flame coal.
背景技术 Background technique
多年来国内外对于降低褐煤和低变质长焰煤的水份,提高煤质的技术工艺做了大量研究试验,采用的方法种类繁多,但还没有成熟的技术流程,存在诸多弊端,主要有:①.烘干后的煤还是完全具有褐煤的缺点,易自燃、风化、易吸水返潮。②.干法烘干因褐煤燃点低,烘干时热风与煤直接接触,危险性大,易着火甚至爆炸;尾汽夹带煤粉,环境污染控制程度差;湿法(蒸汽)烘干时,蒸汽用量大,耗能大,生产成本高,且设备造价昂贵。③.烘干设备复杂,难以大型化生产,投资成本高,生产成本高。Over the years, many domestic and foreign researches and experiments have been done on reducing the moisture content of lignite and low-degradation long-flame coal and improving the quality of coal. The methods used are numerous, but there are still no mature technical processes. There are many disadvantages, including: 1. The coal after drying still has the disadvantage of completely lignite, easy to spontaneous combustion, weathering, easy to absorb water and return to the tide. 2. Dry drying Because lignite has low ignition point, hot air is in direct contact with coal during drying, which is dangerous, easy to catch fire or even explode; tail gas is entrained with coal powder, and the degree of environmental pollution control is poor; when wet (steam) drying, The amount of steam is large, the energy consumption is large, the production cost is high, and the equipment is expensive. 3. The drying equipment is complicated, it is difficult to large-scale production, the investment cost is high, and the production cost is high.
发明内容 Summary of the invention
针对现有技术存在的问题,本发明提供一种褐煤或低变质长焰煤的烘干或低温干馏方法及装置。经该方法和装置烘干或低温干馏后的物料水份降低显著,特别是褐煤或低变质长焰煤,其回吸极小,不发生自燃、风化,单位发热量大幅度提高;体积大幅度缩小,颗粒强度增加;物料中蒸发的水份可以大部分以冷凝水形式排出,环保易于控制,汽化热部分回收利用,生产成本低;设备简单造价低,易于大批量生产。In view of the problems existing in the prior art, the present invention provides a drying or low-temperature carbonization method and apparatus for lignite or low-grade long-flame coal. The moisture content of the material after drying or low-temperature dry distillation by the method and the device is significantly reduced, especially the lignite or the low metamorphic long flame coal, the suckback is extremely small, the spontaneous combustion and weathering do not occur, and the unit heat generation is greatly improved; The shrinkage increases the particle strength; the water evaporated in the material can be mostly discharged in the form of condensed water, the environmental protection is easy to control, the vaporization heat is partially recycled, the production cost is low, the equipment is simple in cost, and it is easy to mass-produce.
为实现上述目的,本发明技术方案为:To achieve the above object, the technical solution of the present invention is:
褐煤或低变质长焰煤的烘干或低温干馏方法,具体步骤如下:Drying or low temperature dry distillation method of lignite or low metamorphism long flame coal, the specific steps are as follows:
①装料:将物料装入装料车上的多个金属料管内;1 Loading: loading materials into multiple metal pipes on the loading car;
②进料:装料完成的装料车从隧道式烘干室的进料端进入隧道式烘干室内;隧道式烘干室的底部或侧部通入预设好温度、流速和流量的热风或蒸汽,烘干室的顶部间隔设置有多个排气口;2 Feeding: The charging device with the filling completion enters the tunnel drying chamber from the feeding end of the tunnel drying chamber; the bottom or side of the tunnel drying chamber is connected to the hot air with preset temperature, flow rate and flow rate. Or steam, the top of the drying chamber is provided with a plurality of exhaust ports at intervals;
③烘干或低温干馏:装料车按预设好的速度从隧道式烘干室的进料端向出料端移动,通入热风或蒸汽,以使装在金属料管内的褐煤或低变质长焰煤的颗粒逐渐升温,进行烘干或干馏;3 Drying or low-temperature dry distillation: The loading vehicle moves from the feeding end of the tunnel drying chamber to the discharging end at a preset speed, and hot air or steam is introduced to make the lignite or low deterioration in the metal material tube. The particles of long flame coal gradually heat up and are dried or retorted;
④经烘干或低温干馏完毕的褐煤或低变质长焰煤的颗粒,经装料车从出料端送出后,经过冷却后,再从金属料管内卸出,即为成品。4 The granules of lignite or low-grade long-flame coal which have been dried or low-temperature dry-distilled are sent out from the discharge end by the loading vehicle, and after being cooled, they are discharged from the metal material tube, which is the finished product.
进一步,在步骤③中,烘干或干馏过程中产生的尾气从隧道式烘干室的顶部的多个排气口排出,并全部或部分通入隧道式烘干室外的热源发生器再加热或与新加入的热风混合后,重新形成所需的温度、流速和流量的热风和蒸汽,从隧道式烘干室的热风或蒸汽进入口通入隧道式烘干室内。Further, in step 3, the exhaust gas generated during the drying or retorting process is discharged from a plurality of exhaust ports at the top of the tunnel drying chamber, and is wholly or partially passed to the heat source generator outside the tunnel drying chamber to be reheated or After mixing with the newly added hot air, the hot air and steam of the required temperature, flow rate and flow rate are reformed, and the hot air or steam inlet port of the tunnel drying chamber is introduced into the tunnel drying chamber.
进一步,隧道式烘干室的顶部的多个排气口排出的尾气部分从另一管道收集起来进行烘干物料的预热和环保处理后的排空。Further, the exhaust portion discharged from the plurality of exhaust ports at the top of the tunnel drying chamber is collected from another pipe for preheating of the drying material and evacuation after environmental protection treatment.
进一步,所述方法可用于其他物料的干燥。Further, the method can be used for drying other materials.
褐煤或低变质长焰煤的烘干或低温干馏装置,该装置包括有一隧道式烘干室,该隧道式烘干室包括一高温段,所述高温段的顶部间隔设置有多个排气口,并于其底部或侧部设有多个热风或蒸汽进入口; 一装料车的速度可控,并自高温段的进料端向出料端移动装设在隧道烘干室内;一热源发生器设置隧道式烘干室外,并连通隧道式烘干室的排气口和热风或蒸汽进入口,其输出温度、流速和流量可控的热风或蒸汽。a drying or low-temperature carbonization device for lignite or low-grade long-flame coal, the device comprising a tunnel drying chamber, the tunnel drying chamber comprising a high temperature section, the top of the high temperature section being provided with a plurality of exhaust ports at intervals And having a plurality of hot air or steam inlets at the bottom or sides thereof; The speed of a loading vehicle is controllable, and is installed in the tunnel drying chamber from the feeding end of the high temperature section to the discharging end; a heat source generator is provided with a tunnel drying outdoor, and is connected to the row of the tunnel drying room. A port and hot air or steam inlet, which outputs hot air or steam with controlled temperature, flow rate and flow.
进一步,所述隧道式烘干室还包括一预热段,预热段的底部或侧部设有多个多余尾气进入口,通过一多余尾气排出管道与高温段的多个排气口连通,并另设有多个尾气和冷凝水排放口。Further, the tunnel drying chamber further includes a preheating section, and the bottom or side of the preheating section is provided with a plurality of excess exhaust gas inlet ports, and is connected to the plurality of exhaust ports of the high temperature section through an excess exhaust gas discharge pipeline. There are also a number of exhaust and condensate drains.
进一步,所述装料车上装载有多个金属料管,多个金属料管间隔设置。Further, the loading vehicle is loaded with a plurality of metal material tubes, and a plurality of metal material tubes are spaced apart.
进一步,于连通预热段的多余尾气进入口和高温段的排气口的多余尾气排出管道上设置有一除尘装置。Further, a dust removing device is disposed on the excess exhaust gas exhausting pipe connecting the excess exhaust gas inlet port of the preheating section and the exhaust port of the high temperature section.
本发明将物料(褐煤或低变质长焰煤的颗粒)装在金属料管中,由热源发生器输出的热媒(热风或蒸汽)并不接触煤颗粒,使易燃物料(褐煤或低变质长焰煤的颗粒)在干燥过程中不接触氧气,不产生燃烧、爆炸的危险性。金属料管固定装设在装料车上,可实现物料相对静止性的烘干,特别有利于褐煤或低变质长焰煤颗粒的改性,体积缩小,强度增加,不返潮,不自燃,不粉化。本发明装料车为速度可控,热源发生器输出的热风或蒸汽的温度、流速和流量可控,有效保证褐煤颗粒在最佳的温度和时间下烘干。高温段排出的尾气可全部或一部分经外置的热源发生器再加热或与新加入的热风混合后,重新形成所需的温度、流速和流量的热风和蒸汽,进行物料的烘干或干馏,也可一部分进入预热段,进行烘干物料的预热和环保处理后的排空。汽化潜热大部回收,环保易于控制。本发明烘干系统易于大型化批量生产,工业化运用程序简单,设备造价低,生产成本低。The invention installs the material (the lignite or the particles of the low metamorphic long flame coal) in the metal material tube, and the heat medium (hot air or steam) output by the heat source generator does not contact the coal particles, so that the flammable material (brown coal or low metamorphism) The particles of long flame coal do not contact oxygen during the drying process, and there is no danger of burning or explosion. The metal material pipe is fixedly mounted on the loading vehicle, which can realize the relatively static drying of the material, and is particularly beneficial for the modification of lignite or low metamorphic long flame coal particles, the volume is reduced, the strength is increased, the moisture is not returned, and the self-ignition is not spontaneous. Powdered. The charging vehicle of the invention has the controllable speed, and the temperature, the flow rate and the flow rate of the hot air or steam outputted by the heat source generator are controllable, thereby effectively ensuring that the lignite particles are dried at an optimum temperature and time. The exhaust gas discharged from the high temperature section may be reheated by an external heat source generator or mixed with the newly added hot air to re-form the hot air and steam of the required temperature, flow rate and flow rate to dry or dry the material. It is also possible to partially enter the preheating section for preheating of the drying material and emptying after environmental protection treatment. Most of the latent heat of vaporization is recycled, and environmental protection is easy to control. The drying system of the invention is easy to be mass-produced in large quantities, the industrialization application procedure is simple, the equipment cost is low, and the production cost is low.
附图说明 DRAWINGS
此处所说明的附图用来提供对本发明的进一步理解,构成本发明的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:
图1是本发明烘干或低温干馏装置的结构示意图;Figure 1 is a schematic view showing the structure of the drying or low-temperature carbonization apparatus of the present invention;
图2是本发明烘干或低温干馏装置的高温段结构示意图。2 is a schematic view showing the structure of a high temperature section of the drying or low temperature carbonization apparatus of the present invention.
具体实施方式 detailed description
为了使本发明所要解决的技术问题、技术方案及有益效果更加清楚、明白,以下结合附图和实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅用以解释本发明,并不用于限定本发明。The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in order to make the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
如图1所示的一种褐煤或低变质长焰煤的烘干或低温干馏装置,该装置包括有隧道式烘干室1、装料车2、金属料管3及热源发生器4。As shown in FIG. 1, a drying or low-temperature carbonization device for lignite or low-grade long-flame coal, the device comprises a tunnel drying chamber 1, a charging cart 2, a metal tube 3 and a heat source generator 4.
所述隧道式烘干室1包括预热段A和高温段B,预热段A和高温段B可连通设置,也可之间相隔一定间距设置。如图2所示产的高温段B,其顶部设有多个排气口11,并于其底部或侧部设有多个热风或蒸汽进入口13,所述高温段B的底部还可设有一个以上的冷凝水排放口12。所述预热段A的底部或侧部设有多个多余尾气进入口15,通过一高温段多余尾气排出管道16与高温段的多个排气口11连通,以在隧道式烘干室1内的进料端到出料端形成一由低温向高温渐近的保温空间。于连通预热段A的多余尾气进入口15和高温段B的排气口11的多余尾气排出管道16上设置有一除尘装置17和一多余尾气控制阀18,所述的除尘装置17最好为静电除尘装置。所述预热段A设有多个尾气和冷凝水排放口19,从尾气和冷凝水排放口19排出的冷凝水或尾气经脱硫设备5环保处理后排空。所述尾气和冷凝水排放口19可设置在预热段A的顶部或侧部以排空尾气,可设置在预热段A的底部或侧部排空冷凝水。The tunnel drying chamber 1 includes a preheating section A and a high temperature section B. The preheating section A and the high temperature section B may be connected or may be disposed at a certain interval. The high temperature section B produced as shown in FIG. 2 is provided with a plurality of exhaust ports 11 at the top thereof, and a plurality of hot air or steam inlet ports 13 are provided at the bottom or side thereof, and the bottom of the high temperature section B can also be provided. There is more than one condensate drain port 12. The bottom portion or the side portion of the preheating section A is provided with a plurality of excess exhaust gas inlet ports 15, and the excess exhaust gas discharge conduit 16 communicates with the plurality of exhaust ports 11 of the high temperature section through a high temperature section to be in the tunnel drying chamber 1 The inner feeding end to the discharging end form a heat insulating space which is gradually approached from a low temperature to a high temperature. A dust removing device 17 and an excess exhaust gas control valve 18 are disposed on the excess exhaust gas discharge pipe 16 of the exhaust gas inlet port 15 of the preheating section A and the exhaust port 11 of the high temperature section B, and the dust removing device 17 is preferably provided. It is an electrostatic precipitator. The preheating section A is provided with a plurality of exhaust gas and condensed water discharge ports 19, and the condensed water or tail gas discharged from the exhaust gas and the condensed water discharge port 19 is emptied by the environmental protection treatment of the desulfurization device 5. The exhaust gas and condensate discharge port 19 may be disposed at the top or side of the preheating section A to evacuate the exhaust gas, and may be disposed at the bottom or side of the preheating section A to vent the condensed water.
所述装料车2速度可控,且设置为多个,装料车2并自预热段A向高温段B移动装设在隧道烘干室内,也就是装料车2J 自隧道式烘干室1的进料端部向出料端部移动的。所述装料车2可以设定好的速度通过牵引机或顶车等驱动设备滑行在隧道烘干室1内设有的轨道14上。The loading cart 2 is controllable in speed and is provided in plurality, and the loading cart 2 is moved from the preheating section A to the high temperature section B to be installed in the tunnel drying room, that is, the loading cart 2J The feed end of the tunnel drying chamber 1 is moved toward the discharge end. The loading cart 2 can be slid on the rail 14 provided in the tunnel drying chamber 1 by a driving device such as a tractor or a top cart at a set speed.
所述金属料管3可为一个或多个间隔装设在每台装料车2上,以随装料车2 一体移动,金属料管3之间留有一定的间隔缝隙,以利于通风。金属料管3可以是圆柱状,也可以是方柱状。The metal material tube 3 can be installed on each loading cart 2 for one or more intervals to accompany the loading vehicle 2 In one piece, there is a certain gap between the metal tube 3 to facilitate ventilation. The metal tube 3 may be cylindrical or square.
所述热源发生器4设置隧道式烘干室1外,所述热源发生器4可为换热器、燃煤热风炉或其他产生高温热风的装置。所述热源发生器4连通隧道式烘干室1的排气口11和热风或蒸汽进入口13。从高温段B的排气口11排出的尾气全部或大部分通过热源发生器4回收再加热后通入高温段B的底部或侧部的多个热风或蒸汽进入口13进入高温段B再利用。该热源发生器4输出的热风或蒸汽的温度、流速和流量可控。设定好温度、流速、流量的热风或蒸汽从隧道式烘干室1的底部或侧部通入。热风或蒸汽通过金属料管3之间的缝隙向隧道式烘干室1的顶部排出,同时加热金属料管3,进而对金属料管3内的物料进行烘干或低温干馏。The heat source generator 4 is disposed outside the tunnel drying chamber 1, and the heat source generator 4 may be a heat exchanger, a coal-fired hot stove or other device that generates high-temperature hot air. The heat source generator 4 communicates with the exhaust port 11 of the tunnel drying chamber 1 and the hot air or steam inlet port 13. All or most of the exhaust gas discharged from the exhaust port 11 of the high temperature section B is recovered by the heat source generator 4 and reheated, and then passes through a plurality of hot air or steam inlet ports 13 at the bottom or side of the high temperature section B to enter the high temperature section B for reuse. . The temperature, flow rate, and flow rate of the hot air or steam output by the heat source generator 4 are controllable. Hot air or steam having a set temperature, flow rate, and flow rate is introduced from the bottom or side of the tunnel drying chamber 1. Hot air or steam is discharged to the top of the tunnel drying chamber 1 through the gap between the metal pipe 3, and the metal pipe 3 is heated, thereby drying or low-temperature carbonizing the material in the metal pipe 3.
上述装置除可用于烘干或低温干馏褐煤或低变质长焰煤外,还可用于其他物料的干燥。现以烘干或低温干馏褐煤或低变质长焰煤为例,具体说明采用上述装置进行烘干或低温干馏的方法,步骤如下:In addition to drying or low-temperature dry distillation lignite or low-grade long-flame coal, the above equipment can also be used for drying other materials. Taking drying or low-temperature dry distillation lignite or low-grade long-flame coal as an example, the method of drying or low-temperature dry distillation using the above device is specifically described. The steps are as follows:
①装料:将褐煤或低变质长焰煤的颗粒装入装料车2上的多个导热性能良好的金属料管3内。1 Charge: The particles of lignite or low metamorphosed long flame coal are loaded into a plurality of metal tube 3 with good thermal conductivity on the loading cart 2.
②进料:装料完成的装料车2从隧道式烘干室1的进料端进入隧道式烘干室1内;隧道式烘干室1的底部或侧部通入预设好的具有烘干能力的温度、流速和流量的热风或蒸汽,热风或蒸汽可以是一点或多点通入。烘干室的顶部间隔设置有多个排气口。2 feeding: the loading and unloading loading vehicle 2 enters the tunnel drying chamber 1 from the feeding end of the tunnel drying chamber 1; the bottom or side of the tunnel drying chamber 1 is pre-set to have The temperature, flow rate and flow rate of the drying capacity of hot air or steam, hot air or steam can be one or more points of access. The top of the drying chamber is spaced apart from the top with a plurality of exhaust ports.
③烘干或低温干馏:装料车2按预设好的速度从隧道式烘干室1的进料端向出料端移动,以设定好的速度通过牵引机或顶车等驱动设备向出料端移动。以使装在金属料管3内的褐煤或低变质长焰煤的颗粒逐渐升温,进行烘干或干馏;烘干或干馏过程中产生的尾气从隧道式烘干室顶部的多个排气口11排出。褐煤或低变质长焰煤的颗粒的水份蒸发并从金属料管中排出,混合在热风或蒸汽里对刚进隧道式烘干室1的低温物料柱进行加热,部分蒸汽又可释放汽化热能后冷凝成水从隧道式烘干室1底部的冷凝水排放口12排出。3 Drying or low-temperature retorting: The loading cart 2 moves from the feeding end of the tunnel drying chamber 1 to the discharging end at a preset speed, and is driven by a driving device such as a tractor or a top car at a set speed. The discharge end moves. In order to gradually heat the particles of lignite or low metamorphosed long flame coal contained in the metal pipe 3 for drying or dry distillation; the exhaust gas generated during the drying or retorting process is exhausted from the top of the tunnel drying chamber. 11 discharge. The moisture of the particles of lignite or low metamorphosed long flame coal is evaporated and discharged from the metal pipe, mixed in hot air or steam to heat the column of low temperature material just entering the tunnel drying chamber 1, and some of the steam can release the heat of vaporization. The condensed water is discharged from the condensed water discharge port 12 at the bottom of the tunnel drying chamber 1.
本发明还通过添置热源发生器4来回收多个排气口11排出的尾气,多个排气口孔11排出的尾气全部或部分通入热源发生器4再加热后,从隧道式烘干室1的热风或蒸汽进入口13重新通入隧道式烘干室1的高温段B内参于烘干或低温干馏工作。由于尾气里的热风带有一定的温度,携带的水蒸汽里含有大量的汽化热,重复利用可以节省大量的热能。同时,因为蒸汽的比热和导热系数高,热风中提高蒸汽的含量有助于提高烘干效率和速率。The present invention also recovers the exhaust gas discharged from the plurality of exhaust ports 11 by adding the heat source generator 4, and all or part of the exhaust gas discharged from the plurality of exhaust port holes 11 is passed into the heat source generator 4 and then heated, and then from the tunnel drying chamber. The hot air or steam inlet port 13 of 1 is re-introduced into the high temperature section B of the tunnel type drying chamber 1 to be subjected to drying or low temperature retorting work. Since the hot air in the exhaust gas has a certain temperature, the carried water vapor contains a large amount of heat of vaporization, and reuse can save a lot of heat energy. At the same time, because of the high specific heat and thermal conductivity of steam, increasing the steam content in hot air helps to increase drying efficiency and rate.
所述热源发生器4可以是燃煤供热的,也可以用其它加热方式。热源发生器4可通入干净的空气,经过热源发生器4加热后成为具有烘干能力的热风后从出料端通入隧道式烘干室1内,对金属料管3进行烘干后从隧道式烘干室1的进料端或尾气和冷凝水排放口11排出,由于通过换热的热风本身是干净的,在烘干过程中没有同褐煤或低变质长焰煤的颗粒直接接触,排出的尾气环保容易控制。通过多余尾气控制阀18的控制,从高温段B的排气口11排出的尾气可部分经除尘装置17净化后通入预热段A,物料在预热段A中充分与金属料管3热交换后降温,蒸汽大部份冷凝成水经脱硫设备5环保处理后排空,汽化潜热大部回收,环保易于控制。The heat source generator 4 may be heated by coal, or may be heated by other means. The heat source generator 4 can be passed through clean air, heated by the heat source generator 4 to become hot air having drying capacity, and then introduced into the tunnel drying chamber 1 from the discharge end, and after drying the metal material tube 3, The feed end of the tunnel type drying chamber 1 or the exhaust gas and the condensed water discharge port 11 are discharged. Since the hot air passing through the heat exchange itself is clean, there is no direct contact with the lignite or the low metamorphic long flame coal particles during the drying process. The exhaust gas is easy to control. Through the control of the excess exhaust gas control valve 18, the exhaust gas discharged from the exhaust port 11 of the high temperature section B can be partially purified by the dust removing device 17 and then introduced into the preheating section A, and the material is sufficiently heated in the preheating section A with the metal material pipe 3. After the exchange, the temperature is lowered, and most of the steam is condensed into water, which is emptied by the environmental protection treatment of the desulfurization equipment. The latent heat of vaporization is mostly recovered, and the environmental protection is easy to control.
④经烘干或低温干馏完毕的褐煤或低变质长焰煤的颗粒,经装料车2从出料端送出后,经过冷却后,再从金属料管3内卸出,即为成品。4 The granules of lignite or low-grade long-flame coal which have been dried or low-temperature dry-distilled are sent out from the discharge end by the charging cart 2, and after being cooled, they are discharged from the metal material pipe 3, which is the finished product.
上述说明示出并描述了本发明的优选实施例,如前所述,应当理解本发明并非局限于本文所披露的形式,不应看作是对其他实施例的排除,而可用于各种其他组合、修改和环境,并能够在本文所述发明构想范围内,通过上述教导或相关领域的技术或知识进行改动。而本领域人员所进行的改动和变化不脱离本发明的精神和范围,则都应在本发明所附权利要求的保护范围内。 The above description shows and describes a preferred embodiment of the present invention. As described above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be construed as being Combinations, modifications, and environments are possible, and can be modified by the teachings of the above teachings or related art within the scope of the inventive concept described herein. All changes and modifications made by those skilled in the art are intended to be within the scope of the appended claims.

Claims (10)

  1. 褐煤或低变质长焰煤的烘干或低温干馏方法,其特征在于:具体步骤如下: Drying or low temperature dry distillation method of lignite or low metamorphosed long flame coal, characterized in that the specific steps are as follows:
    ①装料:将物料装入装料车上的多个金属料管内;1 Loading: loading materials into multiple metal pipes on the loading car;
    ②进料:装料完成的装料车从隧道式烘干室的进料端进入隧道式烘干室内;隧道式烘干室的底部或侧部通入预设好温度、流速和流量的热风或蒸汽,烘干室的顶部间隔设置有多个排气口;2 Feeding: The charging device with the filling completion enters the tunnel drying chamber from the feeding end of the tunnel drying chamber; the bottom or side of the tunnel drying chamber is connected to the hot air with preset temperature, flow rate and flow rate. Or steam, the top of the drying chamber is provided with a plurality of exhaust ports at intervals;
    ③烘干或低温干馏:装料车按预设好的速度从隧道式烘干室的进料端向出料端移动,通入热风或蒸汽,以使装在金属料管内的褐煤或低变质长焰煤的颗粒逐渐升温,进行烘干或干馏;3 Drying or low-temperature dry distillation: The loading vehicle moves from the feeding end of the tunnel drying chamber to the discharging end at a preset speed, and hot air or steam is introduced to make the lignite or low deterioration in the metal material tube. The particles of long flame coal gradually heat up and are dried or retorted;
    ④经烘干或低温干馏完毕的褐煤或低变质长焰煤的颗粒,经装料车从出料端送出后,经过冷却后,再从金属料管内卸出,即为成品。4 The granules of lignite or low-grade long-flame coal which have been dried or low-temperature dry-distilled are sent out from the discharge end by the loading vehicle, and after being cooled, they are discharged from the metal material tube, which is the finished product.
  2. 如权利要求1所述的褐煤或低变质长焰煤的烘干或低温干馏方法,其特征在于:在步骤③中,烘干或干馏过程中产生的尾气从隧道式烘干室的顶部的多个排气口排出,并全部或部分通入隧道式烘干室外的热源发生器再加热或与新加入的热风混合后,重新形成所需的温度、流速和流量的热风和蒸汽,从隧道式烘干室的热风或蒸汽进入口通入隧道式烘干室内。The method for drying or low-temperature carbonization of lignite or low-grade long-flame coal according to claim 1, characterized in that in step 3, the tail gas generated during the drying or retorting process is from the top of the tunnel drying chamber. Exhaust vents, and all or part of the heat source generator that passes into the tunnel drying room is reheated or mixed with the newly added hot air to re-form the required temperature, flow rate and flow of hot air and steam from the tunnel The hot air or steam inlet of the drying chamber is passed into the tunnel drying chamber.
  3. 如权利要求1或2所述的褐煤或低变质长焰煤的烘干或低温干馏方法,其特征在于:隧道式烘干室的顶部的多个排气口排出的尾气部分从另一管道收集起来进行烘干物料的预热和环保处理后的排空。The method for drying or low-temperature carbonization of lignite or low-grade long-flame coal according to claim 1 or 2, wherein a portion of the exhaust gas discharged from the plurality of exhaust ports at the top of the tunnel drying chamber is collected from another pipe. The drying of the dried materials and the emptying after environmental protection treatment are carried out.
  4. 如权利要求1或2所述的褐煤或低变质长焰煤的烘干或低温干馏方法,其特征在于:所述方法可用于其他物料的干燥。A method of drying or low temperature dry distillation of lignite or low metamorphosed long flame coal according to claim 1 or 2, wherein the method is applicable to the drying of other materials.
  5. 如权利要求3所述的褐煤或低变质长焰煤的烘干或低温干馏方法,其特征在于:所述方法可用于其他物料的干燥。A method of drying or low temperature dry distillation of lignite or low metamorphosed long flame coal according to claim 3, wherein the method is applicable to the drying of other materials.
  6. 褐煤或低变质长焰煤的烘干或低温干馏装置,其特征在于:该装置包括:A drying or cryogenic retorting apparatus for lignite or low metamorphosed long flame coal, characterized in that the apparatus comprises:
    隧道式烘干室,包括一高温段,所述高温段的顶部间隔设置有多个排气口,并于其底部或侧部设有多个热风或蒸汽进入口; The tunnel drying chamber comprises a high temperature section, the top of the high temperature section is provided with a plurality of exhaust ports at intervals, and a plurality of hot air or steam inlet ports are arranged at a bottom or a side thereof;
    装料车,其速度可控,并自高温段的进料端向出料端移动装设在隧道烘干室内;The loading cart has a controllable speed and is installed in the tunnel drying chamber from the feeding end of the high temperature section to the discharging end;
    热源发生器,设置隧道式烘干室外,并连通隧道式烘干室的排气口和热风或蒸汽进入口,其输出温度、流速和流量可控的热风或蒸汽。The heat source generator is provided with a tunnel type drying outdoor, and communicates with the exhaust port of the tunnel drying room and the hot air or steam inlet port, and outputs hot air or steam with controllable temperature, flow rate and flow rate.
  7. 如权利要求6所述的褐煤或低变质长焰煤的烘干或低温干馏装置,其特征在于:所述隧道式烘干室还包括一预热段,预热段的底部或侧部设有多个多余尾气进入口,通过一多余尾气排出管道与高温段的多个排气口连通,并另设有多个尾气和冷凝水排放口。The drying or low-temperature carbonization device for lignite or low-grade long-flame coal according to claim 6, wherein the tunnel drying chamber further comprises a preheating section, and the bottom or side of the preheating section is provided A plurality of excess exhaust gas inlet ports are connected to the plurality of exhaust ports of the high temperature section through an excess exhaust gas discharge pipe, and a plurality of exhaust gas and condensed water discharge ports are additionally provided.
  8. 如权利要求6或7所述的褐煤或低变质长焰煤的烘干或低温干馏装置,其特征在于:所述装料车上装载有多个金属料管,多个金属料管间隔设置。The drying or low-temperature carbonization apparatus for lignite or low-grade long-flame coal according to claim 6 or 7, wherein the loading vehicle is loaded with a plurality of metal material tubes, and a plurality of metal material tubes are spaced apart.
  9. 如权利要求6或7所述的褐煤或低变质长焰煤的烘干或低温干馏装置,其特征在于:于连通预热段的个多余尾气进入口和高温段的排气口的多余尾气排出管道上设置有一除尘装置。The drying or low-temperature carbonization device for lignite or low-grade long-flame coal according to claim 6 or 7, characterized in that: excess exhaust gas is discharged from an exhaust outlet port of the preheating section and an exhaust port of the high temperature section. A dust removal device is arranged on the pipeline.
  10. 如权利要求8所述的褐煤或低变质长焰煤的烘干或低温干馏装置,其特征在于:于连通预热段的个多余尾气进入口和高温段的排气口的多余尾气排出管道上设置有一除尘装置。 The drying or low-temperature carbonization device for lignite or low-grade long-flame coal according to claim 8, characterized in that: an excess exhaust gas outlet pipe connecting the excess exhaust gas inlet port of the preheating section and the exhaust port of the high temperature section A dust removal device is provided.
PCT/CN2013/077926 2013-06-22 2013-06-25 Drying or low-temperature destructive distillation method and apparatus for brown coal or low-deterioration long flame coal WO2014201708A1 (en)

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