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WO2014201708A1 - Procédé et appareil de séchage ou de distillation destructive à basse température pour lignite ou charbon flambant se détériorant peu - Google Patents

Procédé et appareil de séchage ou de distillation destructive à basse température pour lignite ou charbon flambant se détériorant peu Download PDF

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Publication number
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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WIPO (PCT)
Prior art keywords
low
drying
temperature
lignite
hot air
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Ceased
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PCT/CN2013/077926
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English (en)
Chinese (zh)
Inventor
蔡京鹏
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Publication of WO2014201708A1 publication Critical patent/WO2014201708A1/fr
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10F—DRYING OR WORKING-UP OF PEAT
    • C10F5/00—Drying or de-watering peat
    • C10F5/06—Drying or de-watering peat combined with a carbonisation step for producing turfcoal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10F—DRYING OR WORKING-UP OF PEAT
    • C10F5/00—Drying or de-watering peat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/02—Machines 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
    • F26B17/04—Machines 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

Definitions

  • 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.
  • 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.
  • Drying or low temperature dry distillation method of lignite or low metamorphism long flame coal the specific steps are as follows:
  • 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;
  • 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;
  • 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.
  • 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.
  • 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.
  • the method can be used for drying other materials.
  • 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.
  • 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.
  • a 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.
  • exhaust and condensate drains There are also a number of exhaust and condensate drains.
  • the loading vehicle is loaded with a plurality of metal material tubes, and a plurality of metal material tubes are spaced apart.
  • 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.
  • 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.
  • Figure 1 is a schematic view showing the structure of the drying or low-temperature carbonization apparatus of the present invention
  • FIG. 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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:
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

La présente invention concerne un procédé et un appareil de séchage ou de distillation destructive à basse température pour lignite ou charbon flambant se détériorant peu. Une chambre de séchage de type tunnel, associée au procédé et à l'appareil, comprend un segment de préchauffage et un segment à température élevée, de multiples orifices d'échappement étant disposés sur la partie supérieure du segment à température élevée, et de multiples entrées d'air chaud ou de vapeur étant disposées sur la partie inférieure ou le côté du segment à température élevée. De multiples entrées de gaz résiduaire en excès sont disposées sur la partie inférieure ou le côté du segment de préchauffage, le segment de préchauffage étant en communication avec les multiples orifices d'échappement du segment à température élevée à travers une conduite d'échappement de gaz résiduaire en excès du segment à température élevée, et de multiples ouvertures d'évacuation de gaz résiduaire et d'eau condensée étant disposées sur la partie inférieure du segment de préchauffage. Le gaz résiduaire évacué par le segment à température élevée peut être chauffé de nouveau entièrement ou en partie par un générateur externe de source de chaleur ou mélangé à de l'air chaud neuf afin de former de l'air chaud et de la vapeur ayant une température, une vitesse d'écoulement et un débit nécessaires pour pouvoir être utilisés dans un séchage ou une distillation destructive d'un matériau, et une partie du gaz résiduaire peut entrer dans le segment de préchauffage afin de préchauffer le matériau à sécher et sera évacuée après traitement de protection environnementale. Le procédé et l'appareil sont respectueux de l'environnement et faciles à commander, la chaleur de vaporisation est recyclée, le dispositif est simple et le coût de fabrication est faible, la production en masse est simple à réaliser.
PCT/CN2013/077926 2013-06-22 2013-06-25 Procédé et appareil de séchage ou de distillation destructive à basse température pour lignite ou charbon flambant se détériorant peu Ceased WO2014201708A1 (fr)

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CN201310250501.0A CN103333703B (zh) 2013-06-22 2013-06-22 褐煤或低变质长焰煤的烘干或低温干馏方法及装置
CN201310250501.0 2013-06-22

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CN115507621A (zh) * 2022-10-08 2022-12-23 中国矿业大学 一种褐煤连续干燥方法
CN117801833A (zh) * 2024-03-01 2024-04-02 浙江润昇新能源有限公司 利用锅炉尾气的内热生物质汽炭联产方法及参数确定方法

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CN105131977A (zh) * 2014-06-04 2015-12-09 袁承世 一种直线移动式连续型干馏釜炭化炉
CN105505515A (zh) * 2016-02-04 2016-04-20 蔡京鹏 一种褐煤或低变质长焰煤的干燥装置及其方法
CN113418367B (zh) * 2021-06-21 2022-07-19 华中科技大学 一种基于多级循环的链式烘干机

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Publication number Priority date Publication date Assignee Title
CN115507621A (zh) * 2022-10-08 2022-12-23 中国矿业大学 一种褐煤连续干燥方法
CN117801833A (zh) * 2024-03-01 2024-04-02 浙江润昇新能源有限公司 利用锅炉尾气的内热生物质汽炭联产方法及参数确定方法
CN117801833B (zh) * 2024-03-01 2024-05-10 浙江润昇新能源有限公司 利用锅炉尾气的内热生物质汽炭联产方法及参数确定方法

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CN103333703A (zh) 2013-10-02

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