Dusts control techniques

Therefore, an essential requirement in plant design is the stringent application of dust control techniques. Specifically designed enclosures enabling materials to be handled in closed systems and extraction and plenum air systems of sufficient capacity to maintain normal working areas free from contamination are essential. Special plant finishes to facilitate good housekeeping are an added requirement. 

There are three main methods used to control silica dust during earth and rock drilling. OSHA recommends that drill operators always use a combination of these dust-control techniques. They are ... 

Kost, J.A., J.F. Colinet, and GA. Shirey. 1985. Refinement and Evaluation of Basic Longwall Dust Control Techniques. OFR 129-85. USBM. 263 pp. 

Brink, J. A. and J. D. Porthhouse, Efficient Dust Control Via New Sampling Technique, Chem. Engineering, Mar. 10, 1969,... 

The purpose of the control plant is to maintain a working environment that is acceptable in terms of any statutory regulations and the custom and practice within an industry. The effectiveness of a control system is measured by the amount of dust or fumes it controls. Efficiency, on the other hand, is measured by the amount of power it takes to do the work. It is the job of the dust-control engineer to produce the most effective plant in the most efficient way, and the techniques of control will vary from one industry to another. All control plants will have either four or five elements, as shown in Figure 46.1, i.e. hoods, ducting, fan, collector and disposal. 

The correct application of either sizing technique will result in a duct network that works well on air. It is equally important to ensure that each air flow is adequate to transfer all the particulates from the hood/enclosure to the collection and/or cleaning device. Unfortunately, many dust control systems have been designed and/or are being operated with little or no regard for what actually has to go through the hood-duct network. This can result in ... 

A nonprofit trade organization that acts as a clearinghouse for medical and technical information about asbestos and asbestos-related products, with emphasis on safety, health, and environmental issues. Works with government agencies to develop and implement industry-wide standards for exposure to asbestos dust emissions into community air and water and exchanges information on methods and techniques of asbestos dust control. Maintains a reference library on asbestos-related subjects. 

The design of a suitable dust control system for a particular application requires knowledge of dust generation and air entrainment. The interaction of these two parameters with the process (e.g. solids throughput, powder properties, temperature, drop height, velocity) also must be considered for this purpose. Unfortunately, the existing techniques to... 

Part 4, Organic Controls Using Remedies Safely, is an encyclopedia of organically acceptable control techniques and products. The major types of controls (cultural, physical, biological, and organic sprays and dusts) are presented in order of least to most invasive to make it easy to choose the best control. 

Previous exposure data and modeling techniques Historical data combined with information on processes, dust control methods, and job assignments were used to create linear statistical models... 

This book describes methods for controlling hazardous dusts from vehicle re-entrainment. waste cleanup activities, and wind erosion. The book addresses sources of fugitive and contaminated dusts as well as providing dust suppressant techniques. 

Pipetting errors are often a major eause of nomeliable test results in a diagnostic laboratory. A simple control technique is hereby proposed to circumvent this problem. At the begirming of each workday, the pipet should be checked for dust and dirt on the outside surfaces. Particular attention should be paid to the tip cone. No other solvents except 70% ethyl alcohol should be used to clean the pipet. 

The technique of pressure loss and specific energy consiunption for dust control, which are determined by the formulas ... 

Occupational skin diseases health and safety precautions Acrylonitrile personal protective equipment Control of lead air sampling techniques and strategies Control of lead outside workers Control of lead pottery and related industries Control of exposure to polyvinyl chloride dust Control of exposure to talc dust Atmospheric pollution in car parks Benzidine based dyes. Health and safety precautions Probable asbestos dust concentrations at construction premises Work with asbestos cement Work with asbestos insulating board Ozone health hazards and precautionary measures Occupational exposure limits (updated yearly)... 

Face-Drill Dust Control Dust control on face drills used in water-soluble ores is generally easier to accomplish than on cutter machines because there are fewer somces. Techniques include both wet and dry systems. 

The fabric filter and plate-type precipitator are available but must be converted for the trials. The scrabber including water supply will be built. Firrther rrranufacturing and installation work will be necessary for the following components pipework, ionization unit, heating section, dust dosing, measurement and control technique. 

Air treatment Any technique used to control the temperature, moisture content, or levels of dusts, gases, vapors, pollens, bacteria or viruses in air. 

Other plant-scale applications to pollution control include the flotation of suspended sewage particles by depressurizing so as to release dissolved air [Jenkins, Scherfig, and Eckhoff, Applications of Adsorptive Bubble Separation Techniques to Wastewater Treatment, in Lemlich (ed.). Adsorptive Bubble Separation Techniques, Academic, New York, 1972, chap. 14 and Richter, Internat. Chem. Eng, 16,614 (1976)]. Dissolved-air flotation is also employed in treating waste-water from pulp and paper mills [Coertze, Prog. Water TechnoL, 10, 449(1978) and Severeid, TAPPl 62(2), 61, 1979]. In addition, there is the flotation, with electrolytically released bubbles [Chambers and Cottrell, Chem. Eng, 83(16), 95 (1976)], of oily iron dust [Ellwood, Chem. Eng, 75(16), 82 (1968)] and of a variety of wastes from surface-treatment processes at the maintenance and overhaul base of an airline [Roth and Ferguson, Desalination, 23, 49 (1977)]. 

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