scholarly journals Production and Performance Evaluation of Noble Fire Extinguishing Foam Suspensions Using Locally Available and Environmentally Friendly Natural Mineral Raw Materials

2020 ◽  
Vol 21 (1) ◽  
pp. 58-64
Author(s):  
Lali Gurchumelia ◽  
Murman Tsarakhov ◽  
Salome Tkemaladze ◽  
Feliks Bejanov ◽  
Lasha Tkemaladze
Keyword(s):  
Large Scale ◽  
Chemical Engineering ◽  
Raw Materials ◽  
Environmentally Friendly ◽  
Cost Effective ◽  
Mechanical Mixing ◽  
Mineral Raw Materials ◽  
Engineering Research ◽  
Fire Extinguishing ◽  
Halogen Free

The main goal of this research is the fabrication of halogen free, environmentally friendly fire-extinguishing powders using local mineral raw materials and the development of technological processes for producing highly efficient fire-extinguishing foam-suspensions on the basis of the produced powders. Fire-extinguishing powders are made by mechanical treatment and mixing of raw materials: zeolite, clay shale, perlite and ammophos. The process does not need introduction of expensive, halogen-containing, hydrophobizators and ensures the cost-effective production of fire-extinguishing powders. The obtained fire-extinguishing powders are characterized by high performance properties, high fire-extinguishing capacity and coefficient of atomic oxygen recombination. Thus, they are characterized both by homogeneous and heterogeneous inhibition of combustion processes. The efficiency of the produced powders is not inferior to that of standard powders of common production. In addition, in contrast to their traditional analogs they are halogen free, environmentally friendly and cheaper (1.2-2 times cheaper). The obtained powders, unlike the ones of conventional production, have good compatibility with water and foam. Our foam-suspensions are prepared just by mechanical mixing of fire-extinguishing powders with water and surface-active substances – foamers. The process does not require chemical treatment of materials. Thus, the developed technology is simple and cost-effective. The foam-suspensions produced on the basis of the obtained powders have higher heat capacity, permeability, wetting effect like water and foam and unlike them, they allow for homogeneous as well as heterogeneous inhibition of the burning process. Thus, the so produced foam-suspensions will have higher extinguishing effect than water, foams or powders, taken separately. Based on the above, it can be suggested that the produced powders can be used for extinguishing all types of fires, including large-scale ones in a combination with water and foams. Chemical Engineering Research Bulletin 21(2019) 58-64

scholarly journals Evaluation of Noble Environmentally Friendly and High Efficient Fire-Extinguishing Means

2020 ◽  
Vol 4 (2) ◽  
Keyword(s):  
Forest Fires ◽  
Large Scale ◽  
Raw Materials ◽  
Environmentally Friendly ◽  
Low Permeability ◽  
Mineral Salts ◽  
Serial Production ◽  
Fire Extinguishing ◽  
High Efficient ◽  
History Of

Reviewing the history of the development of preventing measures, to ensure suppression of fire clearly reveals, that the most urgent of these measures is the use of environmentally friendly, highly efficiency fire extinguishing means. The best fire-extinguishing means are fire-extinguishing powders, which are characterized by high effectiveness and universality. Fire- extinguishing powders of serial production represents the fine dispersed mineral salts with different additives, which decrease tendency of consolidation and caking of powder. In serial production powders halogen containing, organic hydrophobizators are mainly used as such additives. Thus, most of them are halogen containing and do not satisfy the contemporary demands, in the first place with the view of effective, non-toxic and universal use. It also should be mentioned, that fire- extinguishing powders are characterized with less heat capacity, low permeability and wetting effect compared to water and foams, that’s why at extinguishing large scale fires, particularly - forest fires, use of just fire- extinguishing powders is less effective. This article discusses the elaboration of non-halogen, environmentally friendly, high-efficient, universal fireextinguishing powders on the basis of local mineral raw materials of silicate origin and production of highly effective foam-suspensions based on such powders, the use of which will have higher extinguishing ability than water, foams or powders taken separately. The received fire-extinguishing powders will be used at extinguishing of all classes of fires, as well as, in complex with water and foams for extinguishing of large scale fires – forest fires.

scholarly journals Utilization of effluents from hydrochloric acid processing of sphene concentrate

2021 ◽  
Vol 12 (2-2021) ◽  
pp. 120-124
Author(s):  
Yu. G. Kiselev ◽  
◽  
E. S. Shchukina ◽  
Keyword(s):  
Hydrochloric Acid ◽  
Raw Materials ◽  
Environmentally Friendly ◽  
Important Task ◽  
Essential Requirement ◽  
Mineral Raw Materials ◽  
Acid Processing ◽  
Main Components

Mineral raw materials have a multicomponent composition. The extraction and translation of all or the main components into useful products is an urgent and important task. The integrated use of mineral raw materials is an essential requirement of environmentalists for technology developers. The methods of disposal of hydrochloric acid processing of sphene, developed by the authors, make it possible to carry out the process in an environmentally friendly version with obtaining the demanded main and by-product.

Feasibility Study for Onboard Marine Debris Gathering and Recycling

2017 ◽  
Vol 51 (1) ◽  
pp. 32-39
Author(s):  
Hee Jin Kang ◽  
Tae-Byung Chun ◽  
Haeseong Ahn ◽  
Geun-Tae Yim
Keyword(s):  
Large Scale ◽  
Raw Materials ◽  
Cost Effective ◽  
Economic Feasibility ◽  
Marine Debris ◽  
Marine Litter ◽  
Technological Potential ◽  
New Type ◽  
Marine Platform ◽  
Oil Gas

AbstractIt is well known that approximately 90% of all marine debris consists of reusable plastics. Small plastic particles are easily swallowed and disturb marine ecosystems. However, cleaning up marine debris is difficult because of its economic feasibility. Though there are many proven land-based recycling processes available, the high costs of gathering marine debris and transporting it adds to marine debris-related problems. Marine debris cleanup is challenging despite various studies that point to its importance. Therefore, we discuss a recycling chain that concerns gathering, transporting, classifying, recycling, and disposing of marine debris on the ocean. In this study, cost-effective ways of cleaning up large-scale marine litter such as garbage patches are studied. As plastics generate toxic materials during recycling and disposing, this study focuses on how to apply technological potential and meets the required rules and regulations for establishing an economically and environmentally friendly recycling chain for marine debris. In this study, a new type of marine platform is also studied and suggested for a low-energy consumption process and to recycle this debris into oil, gas, and raw materials.

scholarly journals Production of environmentally friendly aerated concrete with required construction and operational properties

2018 ◽  
Vol 143 ◽  
pp. 02010 ◽  
Author(s):  
Evgeniya Tkach ◽  
Vladimir Solovyov ◽  
Semen Tkach
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Building Materials ◽  
Raw Materials ◽  
Environmentally Friendly ◽  
Industrial Wastes ◽  
Hazard Class ◽  
Concrete Production ◽  
Aerated Concrete ◽  
The Impact

The purpose of these studies is to justify the feasibility of recycling different types of industrial waste instead of conventional expensive raw materials in production of environmentally friendly aerated concrete with required construction and operational properties. The impact of wastes from various industries on the environmental condition of affected areas, as well as the results of their environmental assessment were analyzed to determine whether these wastes could be used in production of high-performance building materials. The assessment of industrial wastes in aerated concrete production suggests that industrial wastes of hazard class IV can be recycled to produce aerated concrete. An environmentally friendly method for large-scale waste recycling, including a two-step environmentally sustainable mechanism, was developed. The basic quality indicators of the modified aerated concrete proved that the environmental safety could be enhanced by strengthening the structure, increasing its uniformity and improving thermal insulation properties. The modified non-autoclaved aerated concrete products with improved physical and operational properties were developed. They have the following properties: density – D700; class of concrete – B3.5; thermal transmittance coefficient – 0.143 W/(m·°C); frost resistance – F75.

One-step large-scale highly active g-C3N4 nanosheets for efficient sunlight-driven photocatalytic hydrogen production

2017 ◽  
Vol 46 (32) ◽  
pp. 10678-10684 ◽  
Author(s):  
Waheed Iqbal ◽  
Bocheng Qiu ◽  
Juying Lei ◽  
Lingzhi Wang ◽  
Jinlong Zhang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Large Scale ◽  
Environmentally Friendly ◽  
Cost Effective ◽  
Photocatalytic Hydrogen Production ◽  
Highly Active ◽  
One Step ◽  
Hydrogen Utilization

The development of highly active, cost-effective, environmentally friendly and stable g-C3N4 based photocatalysts for H2 evolution is one of the most anticipated potential pathways for future hydrogen utilization.

scholarly journals Automated Screening System for Covid Safety

2021 ◽  
Vol 11 (2) ◽  
pp. 39-42
Author(s):  
Y Sai Subhash Reddy ◽  
◽  
Sri Krishna Borra ◽  
Koye Sai Vishnu Vamsi ◽  
Nandipati Jaswanth Sai ◽  
...  
Keyword(s):  
Continuous Monitoring ◽  
Large Scale ◽  
Raw Materials ◽  
Cost Effective ◽  
Foreseeable Future ◽  
The World ◽  
Life Threatening ◽  
Automated Screening ◽  
The Government ◽  
Optimum Solution

COVID-19 is a life-threatening virus taking the lives of thousands of people every day throughout the world. Even though many organizations and companies worked hard and developed vaccines, production of vaccines at large scale to meet today’s demand is not an easy job as there is a shortage of raw materials and cases are rising steeply. Inoculation of every individual cannot be achieved in the foreseeable future. Even the government is vaccinating people in a phased manner prioritizing older people and people who are more vulnerable to the virus. The main objective of this work is to provide an optimum solution for COVID-19 indoor safety for industries, offices, and commercial places where footfall is high. This work focus on automation of temperature sensing and mask detection which is usually carried out by a person. Elimination of human intervention reduces the risk of contraction and spreading and avoids mistakes due to human negligence. Continuous monitoring of a person is not possible and there is no guarantee that a person who is entering a place wearing a mask puts it on until he leaves it. This research intends to implement mask detection along with surveillance which is cost effective as it does not require additional hardware setup.

scholarly journals PRODUCING OF NEW TYPES, FIRE-PROTECTIVE COATINGS BY THE USE OF HIGH DISPERSED COMPOSITE POWDERS OF LOCAL MINERAL RAW MATERIALS

InterConf ◽  
2021 ◽  
pp. 315-325
Author(s):  
Lali Gurchumelia ◽  
Murman Tsarakhov ◽  
Tengiz Machaladze ◽  
Dali Dzanashvili ◽  
Feliks Bezhanov ◽  
...  
Keyword(s):  
Technological Process ◽  
Flame Retardants ◽  
Building Materials ◽  
Raw Materials ◽  
Protective Coatings ◽  
Mechanical Mixing ◽  
Composite Powders ◽  
Performance Properties ◽  
Mineral Raw Materials ◽  
Environmentally Safe

The aim of this research is the fabrication of new types, environmentally safe, highly efficient and inexpensive fire-protective coatings by the use of high-dispersed composite powders (with high inhibitory properties) of local mineral raw materials, which in fire-protective coatings will play the role as binders as well as efficient inert flame retardants. Fire-protective coating was prepared only by mechanical mixing of binders and fillers, does not require addition of expensive phosphorus and halogen-containing flame retardants. On the one hand it simplifies technological process of production of materials and on the other hand decreases price cost of fire-protective coatings. Polyurethane resins were selected as binders, popularity of which is due to low price and simple technological process of production, high performance properties and low combustion capacity (in comparison with binders, used in series). High-dispersed composite powders of local mineral raw materials: zeolites, perlites, dolomites and clay shales are used as fillers, which are characterized by high inhibition properties and fire-extinguishing ability. Thus, produced coatings will be environmentally safe and much cheaper compared to imported analogues. Due to their performance properties and fire resistance, they will fully meet the requirements set by the normative documentation for building materials. The performance properties of the obtained fire–protective coatings were determined by laboratory standard methods. Thermogravimetric analysis method allows us to study the thermal stability of the material and determine the relative combustion capacity of the material. The effectiveness of the obtained coating was evaluated by the determine the relative combustion capacity - Oxygen Index (OI) and by of studying combustibility of materials. In the course of studying combustibility of materials in an initial stage was established combustible group by the method of "fire tube”- ГОСТ 1708-71.

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