Onboard Air Curtain Dust Removal Method for Longwall Mining: environmental pollution prevention

2021 ◽  
pp. 106387
Author(s):  
Xu Zhang ◽  
Wen Nie ◽  
Huitian Peng ◽  
Dawei Chen ◽  
Tao Du ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Longwall Mining ◽  
Pollution Prevention ◽  
Dust Removal ◽  
Air Curtain ◽  
Removal Method

scholarly journals Air Curtain Dust Removal Device Design and Dust Prevention Strategy in Heading Face

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Xu Huang
Keyword(s):  
Base Plate ◽  
Dust Concentration ◽  
Prevention Strategy ◽  
Previous Model ◽  
Dust Removal ◽  
Device Design ◽  
Airflow Velocity ◽  
Air Curtain ◽  
Total Dust ◽  
Left And Right

Dust protection is a safety guarantee of heading face. The previous model of air curtain research was ideal, and the dust removal effect was rarely studied in the actual dust-producing face. This paper presents a method of air curtain dust removal (ACDR) in the actual heading face. The author designed an air curtain dust removal device (ACDRD). The law of total dust concentration, respiratory dust concentration, and respiratory dust ratio is obtained. The minimum outlet airflow velocity is analyzed using the flat-plane injection theory. The effect of the exhaust fan placement on the dust removal effectiveness is examined. Research indicates the following: The airflow speed at the upper, left, and right sides of the ∩-shaped slot is 17.39 m/s, 12.04 m/s, and 13.66 m/s, respectively. The minimum dust removal speed of the air curtain is 5.48 m/s. The total dust concentration is the highest in the spot of roadheader operator, and the concentration of respiratory dust decreases sharply within 20 m. When the indentation air duct is 2.1 m away from the base plate, the dust-proof effect is better. The results can provide theoretical bases and methods for air curtain analysis of the heading face.

scholarly journals The Impact of Environmental Pollution on the Health of Middle-Aged and Older Adults in China

2021 ◽  
Author(s):  
Hongli Fan ◽  
Yingcheng Wang ◽  
Ying Wang ◽  
Peter C Coyte
Keyword(s):  
Older Adults ◽  
Environmental Pollution ◽  
Fixed Effects ◽  
Elderly Women ◽  
Population Aging ◽  
Pollution Prevention ◽  
Fixed Effects Model ◽  
Middle Aged ◽  
The Government ◽  
The Impact

Abstract While several studies have demonstrated the negative impacts of environmental pollution on population health, in general, few studies have examined the potential differential effects on the health of middle-aged and older populations, i.e. 45 years and older. Given the twin concerns of environmental pollution and population aging in China, this article employed a fixed effects model to infer the impact of environmental pollution on public health with a particular focus on middle-aged and older adults. The analyses were based on data from the 2011–2018 waves of the CHARLS and pollutant data from prefecture-level cities. The results showed that environmental pollution significantly increased the risk of chronic diseases and negatively impacted the health of middle-aged and older adults. Environmental pollution had its greatest negative effect on the health of the elderly, women, urban residents and those with lower incomes than for their counterparts. We further found that the main channels of effect were through reduced physical exercise and an increase in depressive symptoms, and the pollution prevention actions alleviated the health deterioration of environmental pollution for the middle-aged and elderly. It is imperative for the government to urgently reinforce policy's enforcement to decrease air and water pollution, and enhance the ability to circumvent pollution for the lower socioeconomic groups.

scholarly journals Green Accounting: An Environmental Pollution Prevention Effort to Support Business Continuity

2020 ◽  
Vol 7 (2) ◽  
pp. 128-137
Author(s):  
I Gusti Agung Prama Yoga ◽  
Ida I Dewa Ayu Manik Sastri
Keyword(s):  
Environmental Pollution ◽  
Environmental Sustainability ◽  
Pollution Prevention ◽  
Environmental Accounting ◽  
Business Continuity ◽  
Analysis Method ◽  
Green Accounting ◽  
Financial Report ◽  
Processing Cost ◽  
The Impact

Green accounting has appeared as an accounting era putting forward the environmental factors as the impact of the business sustainability principle that must be maintained by an entity. This study aims to examine the environmental accounting treatment that has been applied by PT Quarzia Batik Baliand to determine the implementation of Green Accounting in supporting the business continuity of PT Quarzia Batik Bali. Business continuity acts as an economic principle, while environmental sustainability represents the social and environmental impacts generated by economic actors. These two aspects must be reconciled as their crucial nature is long-term. This study is design by using the descriptive-interpretive qualitative analysis method, which is a tool to analyse the information and data collected by interpreting the data based on the actor’s perspective. Systematically, this data processing and analysis method consists of three concurrent flows of analysis activities, such as data collection through interviews and questionnaires, data reduction, and drawing conclusions. The results showed that PT Quarzia Batik Bali has anticipated the environmental pollution due to dyed waste produced from the garment industry using environmentally-friendly dyes and provides several storage tanks to recycle waste so it remains ready to be disposed of on earth. However, in the financial report the processing cost has not been presented separately as an anticipated cost of environmental pollution.

An Innovative Approach to Vehicle Electrification for Smart Cities

2015 ◽  
pp. 193-212
Author(s):  
Promiti Dutta ◽  
Albert Boulanger ◽  
Roger Anderson ◽  
Leon Wu
Keyword(s):  
Environmental Pollution ◽  
19Th Century ◽  
Driving Forces ◽  
Smart Cities ◽  
Pollution Prevention ◽  
Innovative Approach ◽  
Technological Transformation ◽  
Alternative Sources ◽  
Art Research ◽  
Developed World

Vehicles, both personal and commercial, have become ubiquitous forms of transportation in the developed world. The auto industry is amidst a technological transformation in identifying alternative sources of energy to power vehicles due to two driving forces: environmental pollution prevention and depletion of fuel resources. This driver for developing “smarter” solutions to create a “smarter planet” is crucial to advancing the science behind electric vehicles (EVs). EVs have been in existence since the mid-19th century, and electric locomotion has been the commonplace in many other vehicle types such as trains. The focus of this chapter is to discuss the feasibility of EVs in smart cities. In particular, the chapter explores the types of EVs, advantages and challenges faced by EVs to penetrate the market, and to outline state-of-the-art research and technologies that are driving the creation of newer and better EVs for adoption in the smart cities of tomorrow.

Pollution prevention in the oil and soap industry: a case study

1998 ◽  
Vol 38 (4-5) ◽  
pp. 139-144
Author(s):  
Sohair I. Abou-Elela ◽  
F. Zaher
Keyword(s):  
Fatty Acids ◽  
Environmental Pollution ◽  
Sodium Hypochlorite ◽  
Edible Oils ◽  
Pollution Prevention ◽  
Soap Industry ◽  
Cost Benefits ◽  
Wide Range ◽  
Sodium And Potassium

Industrial audit of a complex oil and soap factory has been carried out. The factory produces edible oils, fatty acids, soap, crude, industrial and pharmaceutical glycerin, powdered detergents, animal fodder, sodium and potassium silicates, sodium hypochlorite and hypochloric acid. The audit shows that there were a wide range of pollution prevention opportunities which could be implemented with significant financial advantages for the factory as well as reducing environmental pollution. Cost benefits for the recommended environmental improvements have been estimated. Many of the improvements had short payback periods.

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