VDZ-Onlinecourse_6_2_en.pdf

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This is achieved by, for example, electrically or mechanically interlocking the covers with the drives. Obligation to Check Continuous Conveyors squaresolid There is a general obligation to check continuous conveyors in accordance with the APR (accident-prevention regulation) »Prevention Principles« (BGV A1). Before continuous conveyors are first started, they must be checked at suitable intervals, as well as after alterations or servicing, to ensure they are safe or at least that they do not have any externally visible signs of damage and defects (e.g. leaks in pipelines). General Guidelines: squaresolid production supervisors and managers must be informed before any work is carried out. squaresolid before any work is carried out disconnect all conveying and discharging equipment at all poles and secure against reconnection. squaresolid wear personal protective equipment (e.g. ear protection). squaresolid depressurize the entire conveying system if necessary. Safety transformers must be used when working in the pressure vessels, for example for illumination. squaresolid Any noise protection equipment that has been removed (e.g. for rotary blowers) must be put back once work has been completed. squaresolid inform production supervisors and managers when work has been completed. With regard to health and safety measures, the manufacturer’s safety instructions and also the employer’s operating procedures should be observed. 4 Questions on Course LB 6.2 – Pneumatic Conveyors You can test your knowledge by answering the following questions. Question 4.0 A: 1.: Explain the advantages and disadvantages of pneumatic conveying compared with mechanical conveying. 2.: What are the main causes of industrial accidents when working on stationary con- tinuous conveyors? 3.: Name the main characteristic variables of pneumatic conveyors. 4.: What are the two types of pneumatic conveying system? 5.: Briefly explain what is meant by a non-continuous conveyor and give the main difference between this type of conveyor and continuous conveyors. 6.: On what principle is pneumatic conveying based? 7.: What measures are taken in relation to the electrostatic charges that occur in pneu- matic conveyors? 8.: Which system parts are subjected to a particularly high level of wear in pneumatic conveying systems? 9.: What is understood by »pressure drop«? 10.: What is meant by the term »suspension conveying« (»lean-phase conveying«)? Solution see p. 21 VDZ gGmbH Research Institute of the Cement Industry
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21 Solutions Solutions to 4.0 A : 1.: Advantages squaresolid low system costs squaresolid low spatial requirement squaresolid good adaptability to other systems in the works squaresolid completely dust-free conveying is possible, even over fairly long distances. Disadvantages squaresolid relatively high energy requirement and therefore higher operating costs squaresolid pipeline wear, particularly at elbows and pipe diverters 2.: Missing or inadequate safety equipment as well as human error when dealing with stationary continuous conveyors are the main causes of industrial accidents. The technical failure of component parts or system components is generally less sig- nificant.
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  • Fall '19
  • Fluid Dynamics, Pressure measurement, PNEUMATIC CONVEYING SYSTEMS

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