The coal chemical wastewater (CCW) was produced in the process of coal coking, coal lowtemperature distillation, coal gasification, and coal direct liquefaction. The great volume and complex water quality were common, and it was typical industrial wastewater with higher treatment difficulty (Wang et al. 2021b).
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The present invention relates to a lump coal processing facility for coal supply and the objective of the present invention is to process lump coal generated in a process of supplying coal into a state to be used for fuel in a series of processes of supplying coal, thereby increasing manageability of coal storage and usability of a loader and preventing pollution caused by lump coal.
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Patent: Coal treatment process and apparatusCoal treatment process and apparatus
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The basic purpose of coal treatment for most uses to which coal was put, was to reduce the ash content of the coal but during the treatment process some of the sulfur was also removed. ... lowash coal) the Synthoil process of teh Bureau of Mines and the Hcoal process of Hydrocarbon Research Incorporated could be considered as likely process ...
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In this particular plant, it was decided to desaturate the wastewater of sulfates and remove the bulk of the insoluble suspended solids prior to tertiary treatment of heavy metals and arsenic using a chemical/physical treatment process. Additional treatment could be provided (, anoxic biological treatment) for selenium, nitrates and organics.
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The abovementioned four coal liquefaction residue treatment process schemes have the same process of fluidized pyrolysis reaction parts, and the material balance of the reaction is shown in Table 3. For a direct coal liquefaction plant with an oil output of 1 million tons/year, the byproduct coal liquefaction residue is about 700,000 tons/year.
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article{osti_, title = {Coal treatment process}, author = {Taylor, D W}, abstractNote = {A process and apparatus are disclosed for treating coal to produce micronsize coal particles having high surface reactivity and a low level of ashforming impurities. The process involves grinding the coal in a substantially air tight fluid energy attrition mill under controlled temperature ...
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What Is MG217? MG217 products use either 3% salicylic acid or 3% coal tar as their main ingredient to help ease the symptoms of psoriasis. Salicylic acid is a keratolytic agent that dissolves the scales or plaques on the skin. Coal tar suppresses the body's ability to produce skin cells in overabundance. These medicated lotions or creams ...
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In conclusion, multiple lines of evidence were provided to clarify the regulation mechanism of microbial metabolism on the efficient degradation of aromatic compounds for biochemical treatment process of coal chemical wastewater in pilot scale. The results laid a good foundation for realizing the harmless treatment of coal chemical wastewater.
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The process may occur naturally during coal stockpiling for the weathering (Aich et al. 2019; Maloney et al. 1982) ... It is thus suggested to operate the thermal treatment for preparation of coalderived ACs at the heating rate range 2040 °C (Tables and ).
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At the initial stage of steam treatment, the coal maintained a low temperature and a quite low thermal conductivity. The heat was transferred from the coal surface to the interior of the coal through heat conduction. ... T 2 spectra of lignite during the steam treatment process and at complete water saturation. Download : Download highres ...
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In this paper,treatment process of coal chemical industry is described mainly, such as pretreatment process,biochemical treatment process and polishing process. Through the recovery of phenol and ammonia and the treatment of wastewater from abroad, the new technology of wastewater treatment in coal chemical industry was expounded.
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What is Coal Preparation Plant. Coal preparation plant is a coal processing plant that include a series of processes: raw coal screening, crushing, coal washing, separation, clean coal dewatering and slime recycling. Which can separate coal from impurities, remove mineral impurities from raw coal and divide it into different specifications of ...
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In order to solve the problem of mine water treatment in the production process of coal mine enterprises, the source and characteristics of mine water are introduced, and the zero discharge technology of mine water is studied and applied in engineering, the zero discharge technology of mine water includes three stages: pretreatment, concentration and reduction, and evaporation and crystallization.
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In short, there are the following six types of coal slime water treatment processes: 1. Direct flotation separation→ tailings coal concentration → water pressure filtration. This process can quickly realize the effective closedcircuit circulation of coal slime water, improve the utilization rate of clean coal recycling, and enhance the economic benefits of enterprises.
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The treatment process of the wastewater from fixedbed gasification is complex and the operation cost is high (Yang and Corsolini, 2019). Coal chemical projects consume a large quantity of water and produce a lot of wastewater, respectively (Chen et al., 2020). Most of the coal chemical projects are located in the northwest region of China ...
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Library. Syngas Contaminant Removal and Conditioning. Raw synthesis gas (syngas) from the high temperature gas cooling (HTGC) system needs to be cleaned to remove contaminants including fine particulates, sulfur, ammonia, chlorides, mercury, and other trace heavy metals to meet environmental emission regulations, as well as to protect ...
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The coal blended for coking passes through a microwave reaction cavity at a frequency of 300 MHz300 GHz for treatment. In this pretreatment process, the coal layer thickness and length of stay in the reaction cavity should be controlled, the sulphurcontaining gases within the cavity should be exported timely, and it should be ensured that ...
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This treatment process works well to reduce the suspended solids, metals, and acidity in the wastewater, but it leaves in solution the highly soluble salts, including calcium, magnesium, sodium ...
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The synergetic mercury removal by flue gas treatment process in coalfired power plants is widely accepted, but there is a lack of a corresponding model to describe mercury transformations. In this work, a model for mercury transformations is established in a flue gas treatment process model using Aspen Plus.
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The combined technical route of chemical separation, biochemical treatment, and depth treatment is commonly used to treat highly concentrated organic wastewater containing phenols from coal gasification in industry [3,4,5].The coal gasification wastewater contains concentrations of phenolic substances which will poison and inactivate the working flora in the biochemical treatment section.
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The whole treatment process of CPW is shown in Fig. 1. The coal particles are introduced into the drying unit to provide steam for CLG and the remaining dry coal enters into the pyrolysis unit to produce pyrolysis gas and char. The CPW is generated during cooling and separation of pyrolysis gas. The dotted red line represents the impact of CPW ...
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A new costeffective process (Hypercoal process) by the application of the solvent deashing technol. can be adopted for the Hypercoal process. Coal extn. rate achieved almost 70 wt.%daf (based on dry and ashfree coal) from some kinds of coals using tworing aroms. as the recycle solvent.
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Recovery of platinum and synthesis of glassceramic from spent automotive catalyst via cotreatment process with coal fly ash Sun, Shuchen; Liu, Chuan; Xiao, Faxin; Tu, Ganfeng; Abstract. Publication: Journal of Material Cycles and Waste Management.
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The extraction process of CBM involves the dewatering of coal seams, enabling the release of trapped methane gas [1].However, one of the primary challenges encountered during CBM production is the significant amount of water that accompanies the extracted gas [2].This water, known as produced water, poses a major problem in terms of treatment, disposal, and potential environmental impacts.
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Precombustion treatment. Refined coal is the product of a coalupgrading technology that removes moisture and certain pollutants from lowerrank coals such as subbituminous and lignite (brown) coals. ... Capturing carbon dioxide emissions from coal is a process in which a relatively pure stream of carbon dioxide (CO 2) from industrial sources ...
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The rates and extent of coal biodegradation depend upon several factors, including the rank and origin of the coal, type of microbial strains, mode of coal treatment/processing, etc. Coal biodegradation by microbial isolates is being intensively studied to develop effective rehabilitation and revegetation strategies for coal mining areas and ...
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Utah. Plant manager Jon Finlinson at the coalfired Intermountain Power Plant outside Delta, Utah. (Luis Sinco / Los Angeles Times) PacifiCorp is a major player in Utah, too, operating the Hunter ...
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Coalassisted water electrolysis can be used to produce pure hydrogen under mild conditions and reduce the electricity consumption required for water electrolysis by 4060% while achieving clean utilization of coal. However, the kinetics for the process are very slow, and the mechanism has not yet been fully understood.
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The treatment process of this coal gasification wastewater treatment plant consisted of pretreatment processanaerobic processbiological enhanced (BE) processanoxic/oxic (A/O) processadvanced treatment process. The pollutant removal performances of different process units are shown as Table S1 in supplementary material. The wastewater used ...
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