Hydrogen inhibition in wet dust removal systems by using L-aspartic: A feasible way of hydrogen explosion control measures

Author(s):  
Yuyuan Zhang ◽  
Kaili Xu ◽  
Mengyuan Li ◽  
Bo Liu ◽  
Ben Wang ◽  
...  
RSC Advances ◽  
2018 ◽  
Vol 8 (72) ◽  
pp. 41308-41316 ◽  
Author(s):  
Xin Zheng ◽  
Kaili Xu ◽  
Yantong Wang ◽  
Ruiqing Shen ◽  
Qingsheng Wang

The reaction between aluminium dust and water in wet dust removal system is inhibited by using l-phenylalanine.


2019 ◽  
Vol 44 (45) ◽  
pp. 25091-25100 ◽  
Author(s):  
Xin Zheng ◽  
Kaili Xu ◽  
Qingsheng Wang ◽  
Ruiqing Shen ◽  
Yantong Wang

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Hui Zhang ◽  
Weihai Han ◽  
Youlin Xu ◽  
Zhenfeng Wang

In recent years, with the increasing level of mechanization, automation, and intelligence in mine mining, dust pollution in the working environment of coal mines has become increasingly serious. Coal mine dust prevention is an important work related to the life, health, and production safety of miners, and it is also one of the technical problems of mine safety in production. With the continuous revision and improvement of China′s Occupational Disease Prevention and Control Law, coal mining enterprises have generally strengthened the publicity, prevention, and control of occupational diseases among employees, and the control of coal mine dust has been used as a means for enterprises to improve the production environment and strengthen the occupational health of employees. Key work-based studies have shown that China’s coal mines have formed a theoretical system and technology system of dust prevention and control. In the future, China’s coal mines will start from intelligent dust prevention, achieve high-precision dust sensing-transmission-assessment and early warning, and develop a combined dust collector that integrates the functions of atomization dust removal, miniaturization, dry and wet mixing, and large air suction capacity. The combined dust collector realizes the efficient ventilation control and dust removal of the fine dust in wide-area complex spaces such as fully mechanized mining face and fully mechanized mining face. At the same time, breakthroughs have been achieved in low-permeability coal seams, such as strong hydraulic permeability-enhancing technology, intelligent dust-proof robots, and chemical dust suppression. This article introduces the basic concepts, generation, distribution, and hazards of coal mine dust and analyzes the characteristics, applicable conditions, and use effects of various dust control measures such as ventilation dust removal and wet dust removal. Moreover, this article also proposes specific prevention and control measures for related occupational diseases and discusses the development trend of dust prevention and control technology in the hope of providing guidance and reference for coal mine dust prevention and control.


2021 ◽  
Author(s):  
Chengfeng Wang ◽  
Shouqing Lu ◽  
Mingjie Li ◽  
Yongliang Zhang ◽  
Zhanyou Sa ◽  
...  

Abstract Dust pollution and heat damage hazards are important problems affecting underground safety production. This paper is aimed at exploring the optimal magnetization conditions of magnetized water for dust removal and temperature reduction, and improve the utilization rate of water. First, the surface tension, viscosity and specific heat capacity of water under different magnetization conditions were measured experimentally. Then, the magnetization conditions with the best coupling performances were obtained through ANSYS Fluent simulation. Finally, a spray system was designed to control the magnetization conditions strictly. The results demonstrate that the dust removal performance is better when the magnetic field intensity is 150 mT and the magnetization time is 80 s. Under this condition, the specific heat capacity also reaches the maximum. These research results can provide a theoretical basis for the selection of dust pollution and heat damage control measures in mines.


Coatings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 431
Author(s):  
Bohan Zhang ◽  
Kaili Xu ◽  
Xin Zheng ◽  
Xiwen Yao ◽  
Yantong Wang ◽  
...  

Hydrogen, which can be produced due to the accumulation of aluminum dust that reacts with water in wet dust removal systems, is a fire and explosion hazard. To reduce hydrogen production, sodium tungstate is used in hydrogen inhibition experiments to inhibit the reaction between aluminum dust and water. The purity of the aluminum powder was 95.15%, analyzed with X-ray fluorescence spectrometry (XRF). Each of the hydrogen inhibition experiments lasted for 12 h. In addition, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to characterize the surface morphology and composition of particles before and after the experiments. There was nearly no hydrogen produced when the concentration of the sodium tungstate solution reached 100 g/L. The results show that a protective coating containing W element was formed on the surface of the aluminum particles after the reaction with sodium tungstate, and the coating prevented the aluminum particles from contacting with water.


2019 ◽  
Vol 44 (31) ◽  
pp. 17195-17201 ◽  
Author(s):  
Xin Zheng ◽  
Kaili Xu ◽  
Yantong Wang ◽  
Qingsheng Wang

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