WEBJul 10, 2020 · Zero emission of wastewater from coalfired power plants (CFPPs) is one of the pathways for cleaner electricity production. It is expected that lowcost and reliable zero liquid discharge (ZLD) of flue gas desulphurization (FGD) wastewater will be achieved by applying the forced circulation multieffect distillation and crystallization (FCMEDC) .
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WEBOct 1, 2023 · To study the acidizing dissolution effect of mineral components in the microstructure of coal sample after LCO 2 acidizing treatment, the coal sample is first leached by LCO 2, and then it acidified coal samples after leached shown in Fig. 1, the experimental platform is mainly composed of LCO 2 storage tank, plunger .
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WEBJun 1, 2024 · Moreover, the removal rate of PAHs in the conventional biochemical treatment process is only 8–15 % (Jia et al. 2016). Consequently, the key challenge in clean production and highquality development in the coal chemical industry is the urgent need to realize the effective degradation of aromatic compounds and the harmless .
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WEBDec 29, 2022 · Coalwashing wastewater is the residual produced by the coal industry, which may represent a high risk of serious environmental problems worldwide. However, prevailing coalwashing treatment processes are hardly ideal for achieving the goal of solid–liquid separation due to the wastewater's extremely stable physicochemical .
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WEBApr 1, 2024 · The results showed that secondary spontaneous combustion is more likely to occur after LN 2 treatment, and the oxidation combustion reaction process of coal is faster. The above studies mainly focus on the oxidation characteristics of LN 2 to raw coal, but ignore the problem that coal has been oxidized/pyrolyzed before LN 2 injection.
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WEBApr 3, 2018 · An investigation was carried out aimed at checking the feasibility of the novel bioelectroFenton process with FeVO 4 /CF hode on advanced treatment of coal gasifiion wastewater. The maximum power density arrived mW/m 3 in MFCFeVO 4 /CF system, which was corresponding to a current density of A/m 3 at the .
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WEBJul 10, 2016 · The 1977–2015 literature on treatment of the coal gasifiion wastewater is reviewed. An overview based on ammonia and phenol recovery, biochemical treatments and advanced treatment technologies is presented with the purpose of unveiling the reasons behind problems of high concentration of persistent organic pollutants being .
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WEBJul 1, 2023 · The above two experimental results show that the MBR process has a good treatment effect on coal chemical wastewater. Although MBR has been used successfully in the industrial wastewater treatment industry. However, for many years, membrane fouling has been a hot spot and focus in MBR research.
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WEBMar 4, 2021 · Coal chemical enterprises should undertake one to two environmental protection demonstration tasks, while also undertaking process demonstration tasks. Coal chemical industry enterprises should conduct wastewater treatment technology demonstration from the aspects of highconcentration organic wastewater treatment, .
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WEBNov 15, 2023 · 1. Introduction. To meet the growing demand for clean and green energy in China, coal gasifiion industrial has been rapidly developed to produce gaseous fuels in recent years (Ji et al., 2016).However, considerable toxic and refractory wastewater is produced during the production and many types of hazardous pollutants are present in .
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WEBOct 24, 2023 · This treatment process achieved the differentiation of clay mineral content in the experimental coal samples. ... The adsorption process of coal for methane is a complex process that includes several stages. At very low pressure, there is a short sharp rise in the adsorption curve of the coal sample, which is mainly due to the microporous ...
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WEBFeb 15, 2021 · Coal fly ash (CFA) is a byproduct of coal combustion in coalfired power stations. ... The variation of pH during the treatment process was monitored. The final pH of the treated wastewater increased from,,,, and to,,,,, respectively. This could be caused by the dissolution of the residual .
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WEBMay 1, 2022 · At present, the reported treatment technologies of the coal liquefaction residue include direct gasifiion, fuel for boiler combustion, coking, pyrolysis, carbon material preparation, etc ...
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WEBJan 17, 2023 · Coal tar distillate (of which creosote is a product) is a dark brown liquid that is produced by thermal distillation of coal tar. Coal tar is a biproduct of producing coke for steel production from coal via a pyrolytic process in "coke ovens" where the coal is heated to over 1,000°C in an oxygenlimited condition (Ametek 2022).The tar is distilled into .
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WEBJul 10, 2020 · 1. Introduction. Coal plays a significant role in the energy mix of China (Dudley, 2019), which accounts for approximately % of the total installed capacity (National Bureau of Statistics of the People's Republic of China, 2019).With the everincreasing stringent limits on pollution emissions from the energy industry in China, flue .
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WEBJan 1, 2017 · After treatment, the concentration of phenols in the wastewater was reduced to 450 mg/L, suitable for connection with a biochemical treatment process (Yu et al., 2010). In this process the cost for removing phenol, ammonia and other pollutants is the high energy consumption for distillation and stripper process ( Feng et al., 2009 ).
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WEBAug 15, 2023 · 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 .
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WEBNov 1, 2018 · Raw coal fly ash (RCFA) was used directly as adsorbent to treat coking wastewater. The results show that the RCFA can introduce COD (14, 4, and 11 mg L −1 at pH =,, and, respectively) into water due to the dissolution of reductive components from RCFA, this can be avoided by washing (6 times) using distilled water. .
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WEBIn surface mining, the ground covering the coal seam (the overburden) is first removed to expose the coal seam for extraction. The elements of a surface mining operation are (1) topsoil removal and storage for later use, (2) drilling and blasting the strata overlying the coal seam, (3) loading and transporting this fragmented overburden material (called .
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WEBOct 15, 2016 · The experimental results of this research revealed that CFA could be converted successfully to zeolite NaP by the thermosonochemical treatment at low temperature ( 100 °C) and atmospheric pressure in 4 h. The main synthesized zeolitic phase was NaP zeolite with traces of hydroxysodalite with 1 h conventional heating .
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WEBTreatment Processes. In a typical pressure treatment process, wood is placed in a horizontal cylinder up to 150 ft. long and 7 ft. in diameter as shown in Figure 3. The cylinder is flooded with the chemical followed by a cycle of pressure and vacuum. Pressure treatment methods are classified into two basics groups: fullcell and emptycell ...
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WEBFeb 4, 2010 · Coalgasifiion wastewater poses serious problems in the Lurgi process. It cannot be easily purified, as the high pH value of the wastewater limits the dephenolization efficiency of extraction. This work proposes a new process to remove ammonia and sour gas in order to reduce the pH value of the wastewater from 9 to below 7, and next to .
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WEBNov 15, 2016 · It causes that the simulations probably deviate seriously from actual data. Therefore, the accuracy of the simulations for industrial coal gasifiion wastewater treatment units needs to be improved further. These tasks should promote the simulation, design, and optimization of the treatment process of coal gasifiion wastewater.
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WEBJul 1, 2023 · In Zhuang et al. [12], the combined process of pure oxygen microbubbles and MBR were studied. They found that the average removal ratios of COD and total petroleum hydrocarbons (TPH) in wastewater were 80 % and 86 %. The above two experimental results show that the MBR process has a good treatment effect on coal chemical .
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WEBJan 20, 2017 · 1. Introduction. In Lurgi and BGL (British Gas Lurgi) coal gasifiion process, wastewater containing high concentration of phenol and ammonia are discharged (Zhang et al., 2015).The flow rate of this wastewater is large and included pollutants are various (Wei et al., 2016).The concentration of phenol and COD in the wastewater is in a .
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WEBMetallurgical process and design. Eoin H. Macdonald, in Handbook of Gold Exploration and Evaluation, 2007 Spiral separators. Spiral separators were originally developed by Humphreys in 1899 for coal treatment processes in the USA and adapted for separating heavy minerals from beach sands. However, their cast iron construction made them .
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WEBMay 1, 2022 · 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: .
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WEBAug 15, 2023 · 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 .
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WEBFeb 1, 2023 · Cui et al. [10] proposed a new water treatment index system for the whole process of coal chemical industry, which combined the process of each unit and clarified the concentration limits of the index and the quality standard for the recycling water. However, most of the researchers focus only on zero liquid discharge (ZLD) without .
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WEBFeb 1, 2020 · Generation and treatment process of coal gasifiion wastewater. Water treatment in coal liquefaction. According to National Plan for MediumandLong Term Energy Development, coal liquefaction capacity is to increase to 30 million t/a (NDRC, 2007) in 2020. The planned coal liquefaction projects have achieved million t/a in .
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WEBJan 1, 1980 · The 1977–2015 literature on treatment of the coal gasifiion wastewater is reviewed. An overview based on ammonia and phenol recovery, biochemical treatments and advanced treatment technologies is presented with the purpose of unveiling the reasons behind problems of high concentration of persistent organic pollutants being .
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WEBJun 25, 2020 · Anaerobic treatment of coal gasifiion wastewater is usually limited by the inhibition of high concentration of phenolics. In this study, the Fe 3 O 4 loaded biochar (FeBC) coupled with electric field (EFB) was used to enhance anaerobic phenolics degradation. EFB significantly accelerated anaerobic removal of phenol, pcresol and .
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