ignition of pulverized coal with arc heated air

  • Oxy-Fuel Combustion Characteristics of Pulverized-Coal in a …

    transfers the pulverized coal to an ejector system from which the particles are gas-transported to the water-cooled injector. When the oxidizer is air, the transport and the secondary air are supplied by an air compressor (10 bar), with the flow rates being 2

  • Direct ignition of pulverized coal (Patent) | OSTI.GOV

    Abstract Pulverized coal is ignited, to furnish energy for warm-up or low load operation of a coal burning furnace, by a technique which does not require the combustion of significant quantities of liquid or gaseous fuels. The direct ignition of pulverized coal in ...

  • Fundamental Experiments of Coal Ignition for Engineering Design of Coal …

    Thermal Power Plants 68 1. The coal + air mixture at the ignition point is flammable. 2. Coal particles are heated by high temp erature gas in the recirculation flow. 3. Coal particles are also heated by radiant heat from the surroundings. The conditions (1) and (3

  • What is the working principle of the pulverized coal …

     · The basic principle of plasma ignition technology is to directly ignite pulverized coal with a high-power arc. The ignition device uses direct current (greater than 200 A) to initiate arc through yin and yang contact under the condition of medium pressure greater than 0.01 MPa, and obtains a stable power direct current air plasma under a strong magnetic field.

  • Analyses of Some Electric Heating Method Realizing the …

    1 YUAN De1,WANG Yuan1,LIU Yan2,SONG Peng2,DONG Jian-xun2(1 ina Electric Power Investment Group,Beijing 100032,China;2 ijing Zhongdian Yuanneng Science and Technology Co.,Beijing 100080 China);Development and Application on Ignition Technology of High Temperature Air for Pulverized Coal Boiler[J];Electrical Equipment;2007-07

  • Coal Combustion and Combustion Products

    pulverized coal occurred in the brick-kiln in 1831, and fluidized-beds were invented in 1931. ... The air is first heated by the coal ash, and then reacts with the high UNESCO – EOLSS SAMPLE CHAPTERS COAL, OIL SHALE, NATURAL BITUMEN, HEAVY OIL ...

  • Numerical simulation of ignition in pulverized coal …

     · The pulverized coal particles which are initially heated up to 2000 K are distributed in a fully developed mixing layer. The distributions of temperature and various chemical species concentrations in terms of the mixture fraction are analyzed during ignition.

  • World Academy of Science, Engineering and Technology

    Our combustion system where plasma arc acts directly on pulverized coal-air mixture is simple. This should allow a significant improvement of pulverized coal combustion (especially low-quality coal) and its economic efficiency.

  • Plasma Arc Burner for Pulverized Coal Combustion

    In our proposed system, pulverized coal-air mixture passes through plasma arc area that burns between to carbon electrodes directly in pulverized coal muffler burner. Consumption of the carbon electrodes is low and does not need a cooling system, but the main advantage of this method is that radiation of plasma arc directly impacts on coal-air ...

  • Plasma Arc Burner for Pulverized Coal Combustion

    arc acts directly on pulverized coal-air mixture is simple. This should allow a significant improvement of pulverized coal combustion (especially low-quality coal) and its economic efficiency. Preliminary experiments demonstrated the successful functioning of the

  • Failure analysis of high temperature superheater tube (HTS) of a pulverized coal …

    A pulverized coal-fired boiler is an industrial or utility boiler that generates thermal energy by burning pulverized coal also known as powdered coal or coal dust. This type of boiler dominates the electric power industry, providing steam to drive large

  • PLASMATRON IGNITION OF PULVERIZED COAL FOR …

    AIR IS PASSED THROUGH THE ARC OF THE PLASMATRON, CREATING A HIGH TEMPERATURE PLASMA (8,500 K) WITH HIGHLY REACTIVE OXYGEN RADICALS THAT EASILY COMBINE WITH AND IGNITE PULVERIZED COAL. PHASE I OF THIS PROJECT ADDRESSES THE TECHNICAL FEASIBILITY OF THE CONCEPT AND ALSO ALLOWS ASSESSMENT OF ITS MARKET …

  • US4228747A

    An electrical discharge is controlled in such a manner as to permit its use to reliably ignite a fuel stream consisting of pulverized coal entrained in air. The ignition technique of the present...

  • HKU Scholars Hub: Ignition of pulverized coal with hot air …

    Direct Ignition With Hot Air Ignition Of Pulverized Coal Power And Mechanical Engineering Pulverized Coal Burner Issue Date 2007 Citation Dongli Gongcheng/Power Engineering, 2007, v. 27 n. 1, p. 38-41+112 How to Cite? Abstract ...

  • Ignition and combustion of laser-heated pulverized coal

     · An increase in oxygen content gave a high heating rate in the ignition stage and raised the temperature in sustained combustion. Copyright (C) 1996 Elsevier Science Ltd. (Keywords: pulverized coal; combustion; laser heating) To minimize coke consumption and

  • Mathematical simulation of ignition of a coal-dust …

    The process of aerosuspension ignition of a suspension in air in a pulverized-coal burner with a preswitched muffle by a central axisymmetric air stream heated in an electric-arc plasmatron to a temperature of about ≈5000K is numerically simulated. This process is the basis of a new fuel-oil-free method of ignition of the boilers of thermal power stations. The method is rather promising from ...

  • Ignition and combustion of pulverized coal and biomass under …

    This work studied the ignition and combustion of burning pulverized coals and biomasses particles under either conventional combustion in air or oxy-fuel combustion conditions. Oxy-fuel combustion is a ''clean-coal'' process that takes place in O2/CO2 environments

  • US4241673A

    The direct ignition of pulverized coal in accordance with the present invention contemplates the delivery of a dense phase coal/air stream to an ignition zone where it receives ignition energy and...

  • Numerical simulation of ignition in pulverized coal …

     · In order to enhance the ignition, coal particles in the central region of −1.0 mm < y < 0 mm are initially heated up to 2000 K without giving any other heat sources. The reasons to employ this condition are that firstly, to avoid that shear vortices in the central region tended to achieve to the side boundaries before the ignition occurs.

  • Plasma Arc Burner for Pulverized Coal Combustion

    6, in our proposed system, pulverized coal air mixture passes through the long plasma arc area that burns to carbon electrodes directly in pulverized coal burner. Advantages of the proposed plasma arc burner in comparison with the using DC non-transfer plasma

  • US Patent for Pulverized coal arc heated igniter system …

    An electric arc heated, high velocity, oxidizing gas jet is used to ignite pulverized coal as the coal is fed in an air stream through the coal burners in a conventional coal-fired, suspension type steam boiler. The present invention relates to an improved method and ...

  • Plasma Technology for Enhancement of Pulverized Coal Ignition …

    pulverized coal burner equipped with arc plasmatron. The base of the PFS technology is plasma thermochemical preparation of coal for burning. It consists in heating of coal/air mixture by plasma up to temperature of coal volatiles release and char carbon partial

  • USE OF PLASMA ARC HEATER FOR HIGH COAL INJECTION …

    - Reinforcement of the pulverized coal injection system to increase its capacity from 6 to 10 t/h; - Test and measurement equipment for operational control and information acquisition. The basic principle of the plasma torch is the conversion of electrical energy into heat by driving an electric arc through a mass of gaseous material.

  • ignition of pulverized coal with arc heated air

    The direct ignition of pulverized coal in accordance, of a dense phase coal/air stream to an ignition zone where it, Pulverized coal arc heated. Mathematical simulation of ignition of a coal-dust The process of aerosuspension ignition of a suspension in air in a pulverized-coal burner with a preswitched muffle by a central axisymmetric air stream heated in an electric-arc plasmatron to a.

  • Fundamental Experiments of Coal Ignition for …

     · The coal + air mixture at the ignition point is flammable. Coal particles are heated by high temperature gas in the recirculation flow. Coal particles are also heated by radiant heat from the surroundings. The conditions (1) and (3) were investigated by fundamental

  • Development of Co-Firing Method of Pulverized Coal and …

    pulverized coal-fired boilers, and solid oxide fuel cells(2). This paper reports on the development of technology to co-fire ammonia and pulverized coal aimed at reducing CO 2 emissions from coal-fired power plants. Not only CO 2 emissions but also ash

  • High energy arc ignition of pulverized coal (Patent) | …

    High energy arc ignition of pulverized coal Full Record Other Related Research Abstract An electrical discharge is controlled in such a manner as to permit its use to reliably ignite a fuel stream consisting of pulverized coal entrained in air.

  • Heating of Steel in Reheating Furnace – IspatGuru

     · Pulverized coal is not normally evenly distributed in the conveying air within the pipe. Often severe improper distribution of the coal occurs which is known as ''roping''. This is not predictable but tends to become more severe the more bends there are in the system and the longer the pipe run.

  • Ignition and combustion of pulverized coal and biomass …

     · This work studied the ignition and combustion of burning pulverized coals and biomasses particles under either conventional combustion in air or oxy-fuel combustion conditions. Oxy-fuel combustion is a ''clean-coal'' process that takes place in O2/CO2 environments, which are achieved by removing nitrogen from the intake gases and recirculating large amounts of flue gases to the boiler.

  • Ignition of Pulverized Coal with Arc Heated Air | Journal of …

    Journal of Air Transportation Journal of Aircraft Journal of Guidance, Control, and Dynamics Journal of Propulsion and Power Journal of Spacecraft and Rockets Journal of Thermophysics and Heat Transfer Browse All Journals Browse All Virtual Collections Books

  • Characteristics of Pulverized Coal Combustion in High …

     · Characteristics of Pulverized Coal Combustion in High-Temperature Preheated Air Takashi Kiga, Kunio Yoshikawa, Masaru Sakai and Susumu Mochida Takashi Kiga Ishikawajima-Harima Heavy Industries Company, Ltd., Tokyo 135-8733, Japan ...

  • Coal Pulverization System: Explosion Prevention and Process …

    Pulverized coal producing processes are widely used in thermal power stations, cement and iron-smelting industry. ... The heated air inside the dryer brings away the vapor extracted from coal particles. A rotating cooler is used to cool coal powder to 50 C. ...

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