• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present process prepares coking bituminous coal for the subsequent briquetting operation by subjecting the coal, which has a swelling index smaller than five, in granular form with a grain size of up to 14,000 mu to a heating treatment in a hot gas stream. The temperature is regulated in such a manner that an average heat-up speed of about 1,000 DEG C per second is assured, whereby the final temperature is about 400 DEG C. The present process is performed in an elongated tubular member. The granular coal and a hot gas stream are supplied to one end of the tubular member and a particle gas separator at the other end of the tubular member separates the pretreated product from the exhaust gas. For the control of the temperature intermediate inlet means, one or several, are arranged between the ends of the tubular member for supplying additional granular material into the tubular member.
    公开号:SU712028A3
    申请号:SU721791530
    申请日:1972-05-31
    公开日:1980-01-25
    发明作者:Гооссенс Вальтер；Германн Вольфганг
    申请人:Эшвейлер Бергверкс-Ферейн (Фирма)；
    IPC主号:
    专利说明:

    As a result, the product has a foamy porous structure, which makes the briquetting process difficult and the briquettes are not strong enough. To obtain pulverized coke, a method is known when a vertical pipe system is used as a reactor, in which fine-grained swelling coal is moved by gas flow, and subjected to simultaneous preliminary or initial oxidation and coking. At the same time, oxygen-enriched air is used as a carrier gas stream. This method is carried out in two stages, with the first stage serving as preliminary or initial oxidation of coal, and the second stage following it - the coking of coal dust, leading to the formation of coke breeze. In the first stage, the weighed feedstock is heated for 0.5 seconds to approximately 430 ° C and maintains the pH at this temperature for approximately up to. 3 seconds Then the raw material is heated to the second stage for 1 second to 530-560 ° C. The pre-oxidation process leads to the fact that the fine-grained, swelling coal, with a corresponding duration of exposure due to an increase in the oxygen content, produces a clearly visible brownish oxidized edge having a depth of 1 µm. During the subsequent transformation of the pre-oxidized coal to coke breeze by coking, this oxidized edge should prevent additional sintering of the coal itself and clogging of the aggregates | 3. As a way with. using a fluidized bed, as well as this method has the disadvantage that a certain grain size is required to carry out the treatment. Therefore, it is necessary to use expensive crushers and screening plants at the preliminary stage so that the grain size does not exceed 200 µm. In addition, the performance of these types of installations is very limited because the maximum carrying capacity of the gas stream is small, only a few KG / HM-. The fine-grained and uniform structure of the product of the main component during briquetting creates difficulties due to the fact that in addition to high wear, which is a consequence of the fragility of the product, there is also a problem that fine grains can only be insufficiently enclosed in the sintering component filed before briquetting.
    In addition, a preliminary thermal preparation method for coal for further briquetting is known, according to which I; 1 divided coal with a particle size of about 3-10 mm is heated to softening temperature in a gas stream. Herewith, the heating rate is 10-30 ° C / min, and the residence time of the COAL in the heating zone is 0.5-1.5 sec. 4. It is known; a method of preliminary thermal preparation of sintering coals for further bricking, including heating the original carbon in the gas stream to its softening temperature at a speed of 500–5000 ° C / s for 0.1–0.5 seconds and separation from the gas stream | 4.
    The disadvantage of the method lies in the fact that coal briquettes made from the carbon treated in this way have unsatisfactory strength properties.
    For example, the compressive strength is 66 kgf and the abrasion resistance is 14%.
    The aim of the invention is to increase the compressive strength and abrasion.
    The proposed method includes heating the initial coal in a gas stream to its softening temperature at a speed of 500-5000 ° C / sec for 0.1-0.5 sec and separation from the gas stream, characterized in that, in order to increase strength Compressing and rubbing the finished briquettes, before and / or after separation from the gas stream, the coal is cooled to a temperature that is below the heating temperature and above the room temperature.
    As a result of processing, coal is obtained in the form of semi-coke, in the form of expanded perforated grains, and in the form of well preserved grains with pores from coking.
    In the subsequent hot briquetting process, the semi-coke, i.e., the coke-like material serves as the skeleton of the briquette, and the perforated grain is melted into flowing bitumen mass later than the softening hard coal, without losing the heat-engineering advantage, which means that it can still breathe, while the coke-like material in heat engineering is almost inert.
    A well-preserved grain is a necessary further element of the briquette, which in the pressing process, due to the existing ability to shrink, can enter into a very close and strong bond with the binder.
    The proposed method makes it possible to dispense with pre-drying, grinding and precise classification of the raw material. Therefore, it is possible to use coal with an unclassified particle size of up to 14,000 microns.
    It is shown that horizontal displacement allows the load of a gas flow between 10 and 14 kg / nm and, with the same volume of gases, provides improved performance compared to known methods. A variant of the method is that coal is introduced into a horizontal tube at different, one after the other places and thereby subject it to a different time effect of the gas stream. Appearing at. This, at the loading sites, the lowering of the gas flow temperature does not negatively affect the quality of the coal. According to another variant of the proposed method, one after the other in the direction of flow of the injection site allows correspondingly differently dosed quantities of material to make it possible to control the treatment temperature. In this way, in particular, it is possible to precisely control the final temperature of the material being processed, depending on the type of coal used, by using quantities supplied per unit of time in various places. The cooling of the pre-heat treated coal serves to "freeze the three-phase state and, furthermore, to prevent the possible ignition of the coal due to a still relatively high final temperature. The drawing shows the scheme of the proposed method. In the storage bin 1, sintering coal is stored, which is washed but not dried and not fractionated. A portion of the coal is supplied via conduit 2 to a combustion chamber 3 operating with hot flue gases. From there, the gas stream with coal is conducted further by a horizontal pipe 4, while the material being processed is heated at an average heating rate of 000 ° C / s, so that a final temperature of 400 ° C is obtained. In this case, it is taken into account that a corresponding temperature drop occurs at the treatment site, because part of the coal is supplied to pipeline 5 to the injection site 6 located in front in the direction of flow. Mixing material already heated to high temperature with newly introduced material into the flow to be processed It is an excellent way to adjust the desired final temperature. After a maximum residence time of about 0.3 seconds, the gas stream with coal leaves pipe 4 and flows through connecting part 7 into cyclone 8. Connecting part 7 is made with nozzles 9 directed across the direction of movement of the material being processed, to which water is supplied to cool the material. In cyclone 8, the processed material is released from the gas stream and, if necessary, after further cooling with water-spray nozzles 10, is discharged through pipe II to the intermediate hopper 12. From there, the pre-treated material, which includes both coke-free material and expanded material perforated grains, and, in addition, still well-preserved grains with pores from coking, are metered and sent to the main heat treatment process. Example 1. The storage bunker 1 stores sintering blacksmith sintering coal with a content of 14.8% volatile components, which is washed but not dried or fractionated. 250 kg of coal are supplied hourly from the bunker, and 70% of the coal is supplied via pipeline 2 to the combustion chamber 3, working with hot coke oven gases with a temperature of 510 ° C, which are supplied in an amount of 65 D mH, and combustion air (including transport air) - in the amount of 2500. The remaining 30® / o coal is supplied via pipeline 4 to a horizontal pipe 5. From the combustion chamber, the gas stream with coal passes through a horizontal pipe 5, in which coal is heated at a heating rate of 100 ° C / s to a final temperature of 400 ° C. After 0.4 seconds of stay, the gas stream with coal leaves the pipe 5 and flows through the connecting chamber 6 and cyclone 7. The connecting chamber b is made with nozzles 8 directed across the direction of movement of the material being processed, through which water is supplied to cool the processed material to the EPTO. In cyclone 7, the material being processed is separated by a gas stream and supplied via conduit 9 to intermediate pitcher 10. Coal is obtained with the aforementioned three-phase state, which is subjected to briquetting at a pressure of 3 tons. Briquettes are obtained with a length of 6 mm, width 35 mm, height 19 , 5 mm and 5.5 cm in volume, the compressive strength of which is 94.3 kgf, and the abrasion resistance - 8%. Example 2. It is carried out as in Example I, but blacksmith coal is used with a content of 15.7% volatile components and the following conditions are maintained: 730 coke gas; 3000 combustion air incl. air for transport); 500 ° С bed temperature coal; 670 °; gas temperature; 0.12 seconds residence time; ohllazhenie o6pa3OBaf Horo material up to 400 ° C. Three-phase charcoal is obtained, which is subjected to brkegirova (I ично illogical to example 1. Briquettes are obtained with a character-source and similar to example I. Compressive strength is 95.8 kgf, and abrasion resistance is 7.6%.
    权利要求:
    Claims (1)
    [1]
    Claim .
    A method for preliminary thermal preparation of sintering coals for further briquetting, comprising 28 heating, source coal in a gas stream to a temperature! softening it at a speed of 500-5000 ° C / sec for 0.1 - 0.5 sec and separation from the gas stream, characterized in that, in order to increase the compressive strength and abrasion of the finished briquettes, before and / or after separation from a gas stream, the coal is cooled to a temperature that is 100 ° C below the heating temperature and above room temperature.
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    同族专利:
    公开号 | 公开日
    BE784501A|1972-10-02|
    IT956960B|1973-10-10|
    FR2140629B1|1977-12-23|
    FR2140629A1|1973-01-19|
    GB1379980A|1975-01-08|
    AU4284772A|1973-12-06|
    NL7207952A|1972-12-13|
    AU463534B2|1975-07-31|
    PL79500B1|1975-06-30|
    CA954063A|1974-09-03|
    US3869350A|1975-03-04|
    DE2128949B1|1972-12-28|
    RO77799A|1981-11-24|
    ZA723812B|1973-03-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1781614A|1925-12-21|1930-11-11|Trent Process Corp|Process for distilling coals|
    US2658862A|1950-06-09|1953-11-10|Reilly Tar & Chem Corp|Process for the defluidization and fixed-bed coking of a preheated fluidized coal|
    US2998354A|1960-02-04|1961-08-29|Exxon Research Engineering Co|Transfer line heater in calcining fluid coke|
    US3175888A|1961-05-29|1965-03-30|Phillips Petroleum Co|Apparatus for producing low structure carbon black|
    US3424556A|1966-07-27|1969-01-28|Us Interior|Production of carbon black from coal|
    US3499834A|1967-02-16|1970-03-10|Phillips Petroleum Co|Retorting of hydrocarbonaceous solids|
    US3736233A|1970-07-23|1973-05-29|Occidental Petroleum Corp|Process of pyrolyzing and desulfurizing sulfur bearing agglomerative bituminous coal|US4208251A|1978-06-19|1980-06-17|Rasmussen Ross H|Process and apparatus for producing nonaqueous coke slurry and pipeline transport thereof|
    GB2161696A|1984-07-19|1986-01-22|John Davies|Protective safety helmet|
    HUT62644A|1989-02-28|1993-05-28|Coalcorp Inc|Process and equipment for briquetting slack coal and briquette thus obtained|
    DE4235368A1|1991-10-21|1993-04-22|Mitsui Mining Co Ltd|Activated moulded coke prodn. used as catalyst - comprises pre-coking coal to semi-coke, adjusting properties, forming moulded material, coking and activating|
    KR100206500B1|1995-12-29|1999-07-01|이구택|Method of block coke for iron melting furnace|
    US20080134572A1|2006-12-06|2008-06-12|Bao Tai Cui|Method for Making a Combustible Fuel Composition|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19712128949|DE2128949C|1971-06-11|Thermal pretreatment process for hot chain-linking of baking coal|
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