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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WEBDec 10, 2021 · CoalA is the reject/tailing coal from fines circuit (− mm) froth flotation process, which is presently used for foundry appliion. CoalB and CoalC are the rejects from the coarse circuit (−13 + mm) dense medium cyclone. CoalB is also known to be coal middlings, is used for power generation.
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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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WEBNov 1, 2017 · Phenols and ammonia recovery process is a significant part of the CGW treatment to remove sour gas such as H 2 S and CO 2, and recycle the valuable resource in turn, such as phenols and ammonia [5].Nowadays, several types of phenols and ammonia recovery process have been applied to industry [6], [7], [8].The main .
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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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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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WEBJun 15, 2020 · 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 .
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WEBSep 1, 2023 · Cumulative effects and metabolic characteristics of aromatic compounds in microbial cells during the biochemical treatment process of coal chemical wastewater. Author links open overlay panel Lu Yang a, Yongjun Liu a b, Aining Zhang a ... This study aimed to investigate the effectiveness of a biochemical treatment system for coal .
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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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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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WEBJun 25, 2020 · Coal gasifiion wastewater (CGW) contains several types of aromatic pollutants, which impart high biotoxicity and reduce the quality of anaerobic treatment. Two types of hydrolysis acidifiion processes, namely microaerobic hybrid reactor (HA1) and upflow anaerobic sludge blanket reactor (HA2), were developed for pretreatment .
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WEBJan 1, 2019 · The wastewater treatment process was firstly developed for Lurgi fixed bed pressurized gasifiion wastewater to deal with the high concentrated phenol and ammonia [22]. It is well introduced in Harbin gasifiion plant and Inner Mongolia Tuke coal fertilizer project [13]. ... Coal gasifiion unit as the core of the entire coaltoSNG ...
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WEBDec 1, 2021 · This review analyzes all the treatment technologies of the typical coal chemical wastewater projects investigated in China based on these three processes. From the evaluation of the advantages and ...
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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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WEBDOI: / Corpus ID: ; A review on the coal gasifiion wastewater treatment technologies: past, present and future outlook article{Ji2016ARO, title={A review on the coal gasifiion wastewater treatment technologies: past, present and future outlook}, author={Qin and Salma .
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WEBA process for converting a finely divided carbonaceous material, particularly coal, to a fuel gas. A finely divided or pulverized carbonaceous feed material, such as coal, is pretreated at a temperature of about 700 to 800/sup 0/F in order to destroy the caking properties of a caking coal feed in a fluidized pretreatment zone, or, alternatively to dry a noncaking .
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WEBJan 1, 2023 · The process of coal tailings and finegrain materials caking should be chosen mainly based on the market demands and economic applicability. ... supports separation efficacy in the NMDD process. The treatment plant is usually built in modules (each module with ~350 tons of feed material capacity per hour). The plant is loed in a free ...
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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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WEBJan 1, 1980 · In this study dehnable Biological treatment of a coal gasifiion process wastewater 1271 steadystate operation occurred from 30 to 120 days in closed, full containers in order to minimize contact after the reactors were acclimatized depending upon with air. Upon arrival, solids were separated from the specified value of mean cell .
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WEBNov 1, 2020 · In the treatment of highsalt wastewater, coal chemical industry projects in China mostly use the "double membrane" reuse technology of "ultrafiltration + reverse osmosis". Reverse osmosis is the core and main technology of reuse treatment, while ultrafiltration is the pretreatment and protection process. Highsalt wastewater refers to ...
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WEBDec 1, 2017 · Coal chemical wastewater has such characteristics as high concentration of oil, ammonia nitrogen and COD. 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 .
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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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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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