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Tuesday, May 19, 2020 | History

2 edition of Environmental assessment of dry coke quenching vs. continuous wet quenching found in the catalog.

Environmental assessment of dry coke quenching vs. continuous wet quenching

C. W. Westbrook

Environmental assessment of dry coke quenching vs. continuous wet quenching

by C. W. Westbrook

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  • 40 Currently reading

Published by U.S. Environmental Protection Agency, Industrial Environmental Research Laboratory, National Technical Information Service [distributor in Research Triangle Park, NC, Springfield, Va .
Written in English

    Subjects:
  • National Steel Corporation.,
  • Coke -- Quenching.,
  • Steel industry and trade -- Environmental aspects -- West Virginia.

  • Edition Notes

    Statementby C.W. Westbrook and D.W. Coy ; prepared for U.S. Environmental Protection Agency, Office of Research and Development.
    SeriesResearch reporting series -- EPA-600/2-80-106.
    ContributionsCoy, D. W., Industrial Environmental Research Laboratory (Research Triangle Park, N.C.), Research Triangle Institute.
    The Physical Object
    Paginationv, 31 p. :
    Number of Pages31
    ID Numbers
    Open LibraryOL17653584M

    A method for quenching coke mass is disclosed. The coke mass may be quenched by providing an aqueous stream with a quench aid, and contacting the coke mass with the aqueous stream. The quench aid may have at least one fatty alcohol ethoxylated surfactant. Novel compositions comprising at least two secondary alcohol ethoxylates, which are suitable as surfactants, quenching aids, or dewatering Author: Nachiappan Arumugam, Umit Turunc, Nimeshkumar Kantilal Patel, Seethalashmi Suresh, David J. Bradacs.   Quenching can lead to warping/cracking and other issues with the material, even when it is done properly. Using water as a quench media, for instance, can cause the material to warp as it cools. It is crucial to control the environment in which the quenching is done .

    CDQ stands for Coke Dry Quenching (method). CDQ is defined as Coke Dry Quenching (method) very frequently. Printer friendly. Menu Search. New search features Acronym Blog Free tools Canada: T5A 0A7. What does CDQ stand for? CDQ stands for Coke Dry Quenching (method) Suggest new definition. This definition appears very frequently and is. a) Conventional quenching, b) Intensive quenching a) b) M rest of the ring continues shrinking due to the thermal contraction. This results in the ring distortion or may even cause part cracking. In contrast to conventional quenching, during the IQ process due to a very high heat extraction rate, the martensitic structure forms uniformly.

    Since quenching liquids must be maintained within definite temperature ranges, mechanical means are used to keep the temperature at prescribed levels during continuous operations. LIQUID QUENCHING. The two methods used for liquid quenching are called still-bath and flush quenching. Instill-bath quenching, you cool the metal in a tank of liquid. The heat recovered by inert gas is used to produce steam, which may be used on-site or to generate electricity. Hot coke from the coke oven is cooled in specially designed refractory lined steel cooling chambers by counter-currently circulating an inert gas media in a closed circuit consisting of 1) cooling chamber, 2) dust collecting bunker, 3) waste heat boiler, 4) dust cyclones, 5) mill fan.


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Environmental assessment of dry coke quenching vs. continuous wet quenching by C. W. Westbrook Download PDF EPUB FB2

Get this from a library. Environmental assessment of dry coke quenching vs. continuous wet quenching. [C W Westbrook; D W Coy; Industrial Environmental Research Laboratory (Research Triangle Park, N.C.); Research Triangle Institute.].

EPA/ May Environmental Assessment of Dry Coke Quenching Vs. Continuous Wet Quenching by C.W. Westbrook and D.W. Coy Research Triangle Institute P.O. Box Research Triangle Park, North Carolina Contract No. Task No. 1 Program Element No. 1ABC EPA Project Officer: Robert C.

McCrillis Industrial Environmental Research Laboratory. with wet quenching, the dry quenching technology can increase the M40 and M10 of coke by % and % respectively. This is advantageous to reduce ironmaking costs and improve pig iron outputs.

The cold inert gas was used in the CDQ shaft (Coke Dry Quenching) and exchanged heat with the hot red coke to cool the red coke. Then. Coke Dry Cooling Plant CDCP Coke Dry Quenching Plant CDQ Live model. Coke Dry Quenching (CDQ) Coke Dry Quenching (CDQ) is a heat recovery system to quench red hot coke from a coke oven to a temperature appropriate for transportation.

It is an energy saving system in which, during quenching process, sensible heat of the red hot coke is recovered and utilized for power generation or as steam. In wet quenching, Paul Wurth has developed its own technology called “Lo-Mo Type”, standing for low moisture content.

High dust removal efficiency is obtained in a double way by a dust abatement system and steam washing. In that way, dust contents of less than 10g/ton of coke and coke water contents of less than 3% are reached.

Dry. The quenching in cold nitrogen takes place outside the coke oven ('s) and heated nitrogen is used energetically. Wet quenching of coke in the packed towers with cellular packing is not my idea.

coke is cooled gradually in chamber by the use of cooling a result, the coke is free from surface pore due to aquatic gasification reaction and internal crack that occur in wet quenching. In addition, brittle portions of coke are removed when it drops in the chamber.

*1 Drum Index *2 File Size: KB. A thermodynamic analysis (first and second laws) was performed for a coke dry quenching (CDQ) unit with all data obtained in the site and under the unit normal operating conditions.

Expressions to evaluate the coke specific heat, enthalpy, entropy and physical and chemical exergies, as well as particulate material (dust) formation indices, and Cited by: In traditional CWQ (coke wet quenching) system, hot coke is cooled by spraying water.

The approach results in high CO2 emissions and thermal energy loss. The CDQ (coke dry quenching) system is an energy conserving alternative, inwhich hot coke is quenched by inert gases instead of spraying water in the quenching tower [1].

The recovered thermal. In materials science, quenching is the rapid cooling of a workpiece in water, oil or air to obtain certain material properties.A type of heat treating, quenching prevents undesired low-temperature processes, such as phase transformations, from occurring.

It does this by reducing the window of time during which these undesired reactions are both thermodynamically favorable, and kinetically. ABSTRACT The report gives results of an assessment of the multimedia environmental impacts of continuous wet and dry quenching at National Steel's Weirton, West Vir- ginia, Brown's Island coke plant.

The report, based primarily on design data, test data from related processes, and engineering judgement, suffers from the lack of definitive test. Quenching of coke after carbonization is an important step that influences its strength and reducibility in a blast furnace.

During the wet coke quenching process, hot coke from °C is. 1. A wet quenching tower for quenching hot coke, with a quenching chamber (2), with a quenching shower unit (3) above the quenching chamber (2) for the discharge of quenching water, with a chimney (4) placed onto the quenching chamber (2), and with at least one vertical-throughflow separation device (6) which is arranged horizontally or at an oblique angle to the vertical and which has a.

• CDQ (Coke Dry Quenching) is a gradual coke quenching system, and improves coke strength and coke size distribution. Consequently, while the blending ratio of inexpensive non- or slightly-caking coal for coke oven material is only approx.

15% in case of CWQ (Coke Wet Quenching) system, it can be increased up to approx. 30% by CDQ. Tata Steel sets up Coke Dry Quenching facility at Odisha 06 Nov,AM IST Nippon Steel and Sumkin Engineering (NSENGI) of Japan were the supplier and technology partner of the CDQ system set up at Tata Steel Kalinganagar.

A method and apparatus for the wet quenching of coke is disclosed wherein hot coke is sprayed from above with quenching water, the steam generated by the heat of the coke is condensed by a spray of condensation water from the top of the quenching tower, and the hot condensate-water mixture is collected at the bottom of the quenching tower and recirculating to the top of the tower where it is Cited by: Coke strength after small reaction (%) 65 10 49 50 55 13 48 52 Wet quenching Dry quenching 15 15 CO2 CO H2 N2 Sample CDQ operating data˜ ˜ CDQ plants Comparison of CDQ coke quality Outline of technology Red-hot coke Processing capacity: t/hr Temperature File Size: 69KB.

Wet quenching is the most common method of coke cooling. Experiments on wet quenching using water with different parameters are discussed. The coolants employed are treated rainwater and treated phenolic wastewater with different content of inorganic by: 1. Dry coke quenching plants (DCQP) Parts (as a suite, individually): 1.

The movement lift (ML) The movement lift (ML) is a restrictedly mobile self-propelled run machinery of cyclic action that seizes, moves VRK body (filled with hot coke, burden) along the shaft guides of DCQP from the lower level to the top, carries the load from the tripping point to the place of unloading (into the quenching.

Abstract. In assessing the operational efficiency of dry-quenching units at coke plants, it is important to consider the coke losses. In the present work, existing methods of Cited by: 3.Other articles where Dry quenching is discussed: coal utilization: Coke ovens: This is called dry quenching.Hot coke out from the coking chamber is received by a circular rotary coke tank on the coke quenching car towed by the electric locomotive.

When the car runs to the bottom of the CDQ hoisting headframe, the coke tank is hoisted up by the hoister to the top of the headframe and then moved horizontally to the center of CDQ furnace.