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New Technologies for Preventing and Controlling Dust Hazards in Non Coal Mines in China
Issue:
Volume 11, Issue 3, September 2023
Pages:
71-77
Received:
14 June 2023
Accepted:
27 July 2023
Published:
31 July 2023
Abstract: China has a large number of non-coal mines and a wide range of dust production points, making it difficult to supervise them. At the same time, the dust monitoring rate of non-coal mines in China's open-pit mining is low, and the continuous monitoring system of non-coal mines in underground mining is also lacking. In particular, the continuous monitoring technology of respiratory dust is still blank, and it is impossible to continuously monitor the respiratory dust pollution status of workers' workplaces in real time, and it is impossible to build an early warning system for pneumoconiosis in China, and it is impossible to achieve timely protection for operators. In order to further improve the progress of dust control technology in non-coal mine mountains in China, this paper analyzed the current status of dust hazards in China's non-coal mine mountains, comprehensively summarized the dust hazard control technology and dust detection technology in China's non-coal mine mountains, analyzed and studied the applicability and dust reduction effect of each dust control technology, and provided technical selection guidance for non-coal mine dust control. By analyzing the problems of dust hazard control in China's non-coal mine mountains, the development direction of dust hazard control technology in China's non-coal mine mountains is proposed, and the basic basis and development guide are provided for the dust control in China's non-coal mine mountains.
Abstract: China has a large number of non-coal mines and a wide range of dust production points, making it difficult to supervise them. At the same time, the dust monitoring rate of non-coal mines in China's open-pit mining is low, and the continuous monitoring system of non-coal mines in underground mining is also lacking. In particular, the continuous moni...
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Research and Application of Integrated Sand and Water Control in Horizontal Well
Du Weigang,
Ji Peng,
Li Ningbo,
Yang Shuo,
Xu Guoqiang
Issue:
Volume 11, Issue 3, September 2023
Pages:
78-83
Received:
4 May 2023
Accepted:
2 August 2023
Published:
4 August 2023
Abstract: The problem of sand and water coming out of the oil formation has been a difficult problem in horizontal wellsm, especially in unconsolidated sandstone reservoirs. Analysis of the current technology and application effects, sand and water control integration is an effective method to solve this problem. The article analyzes the main difficulties of integrated sand and water control technology, investigates the development and application of sand and water control technology, and selects integrating mechanical water control and gravel packing sand control. The principles, advantages, and disadvantages of Flow channel-controlled and floating disc type AICD water control valve are introduced. The water-oil pressure drop ratio parameter was used to evaluate the performance of different water control valve. At same times, a new type of integrated screen for water and sand control was designed. A horizontal well with water at the bottom of a sparse sandstone reservoir was used as a case study for the field application of integrated water and sand control technology. The integrated sand and water control technology was applied in an offshore horizontal well. Through the summary of the scheme design and construction process, the proposal of the integrated sand and water control scheme design is suggested. The application of this technology is expected to provide a reference for the design of sand and water control integration scheme.
Abstract: The problem of sand and water coming out of the oil formation has been a difficult problem in horizontal wellsm, especially in unconsolidated sandstone reservoirs. Analysis of the current technology and application effects, sand and water control integration is an effective method to solve this problem. The article analyzes the main difficulties of...
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Assessment of Energy Production by Using Microbial Fuel Cells Substrate of Domestic Wastewater Development of the Renewable Energy
Tensay Kifle,
Esayas Alemayehu,
Chali Dereje Kitila
Issue:
Volume 11, Issue 3, September 2023
Pages:
84-99
Received:
29 August 2023
Accepted:
19 September 2023
Published:
9 October 2023
Abstract: Biodegradable materials are used in microbial fuel cells to produce energy when microbes are present. Large amounts of organic material found in wastewater can be oxidized in MFCs to provide power. In the current situation energy crisis is a growing problem throughout the world, which necessitates the creation of alternative energy sources that generate less carbon dioxide and benefit the ecosystem, like the use of wastewater best solution for such challenge. The goals of the study were examined through laboratory-based experimentation. The capacity of microbial fuel cells and the type of substrate employed were evaluated using experimental research designs. Experimental methods were used to determine the amount of electric current generated by wastewater during treatment. Maximum Voltage Output or OCV (open circuit voltage) values of 118.93 mV, 144.84 mV, and 89.76 mV are attained for MFC1, MFC2, and MFC3, respectively, when the resistance is infinite. The MFC that employed graywater as a substrate produced the least amount of electricity of the three, but it was the most stable. COD reduction was highest in urine waste, at roughly 65.83%, compared to 56.69% and 58% for blackwater and graywater waste, respectively and BOD5 removal of substrate urine, blackwater and graywater are 67.79%, 69.18% and 28.89% respectively value. MFC 2 had the highest maximum power output, with a value of 0.00655 W/cm2 equating to 0.00453A/cm2 of current. It found the following values for the other fuel cells: 0.00442 W/cm2, and 0.00251 W/cm2, corresponding to current values of 0.00372 A/cm2, and 0.00281 A/cm2 are respectively value of MFC1 and MFC3 are respectively value.
Abstract: Biodegradable materials are used in microbial fuel cells to produce energy when microbes are present. Large amounts of organic material found in wastewater can be oxidized in MFCs to provide power. In the current situation energy crisis is a growing problem throughout the world, which necessitates the creation of alternative energy sources that gen...
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