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Mechanical Bulk Material Handling

 

 

      

 

Mechanical conveyors are ideal for transporting powders and bulk materials. Such materials are conventional ingredients or products of processes in such areas as solid fuel power and heating plants (coal, peat, biomass, sawdust, wood chips). 

Mechanical Conveyors

Drag chain conveyors


We offer a wide range of high-performance chain scraper conveyors to transport various types of powders and bulk solids. These conveyors are suitable for transportation of ash, lime and solid fuels. An important feature is to keep the effective speed of the material, which ensures high reliability and efficiency. Mechanical Solutions                                                                              

Forged chain conveyors are essential when transporting abrasive materials or when operating at high temperatures (up to 600 º C). Forged chain conveyors are usually made of hardened steel with 20% Mn and 5% Cr or tempered steel containing 27% Mn and 5% CrB (boron steel). In special cases, the links and pins are made of hardened stainless steel or heat-resistant steel.

 

 

There are three main types of plate scraper chain conveyors:

T-shaped plate is suitable for horizontal movement, and is used in pipelines up to 630 mm wide.

P-shaped plates are used for inclined or vertical movement up to an angle of inclination of 90 degrees.

I-shaped plate is a two-row plate used in wide conveyors from 500 to 1200 mm .   

 

Performance and Capacity                                                    

Operating capacity range of drag chain conveyors lies between 1 to 600 m ³ / h Performance depends on the density of the transported material and the required transportation distance.

Screw conveyors

Screw conveyors can also be used in the energy sector, provided that the conveyor length not exceeding 12 m existing conveyors cooled to reduce the temperature of fly ash transported from the filters, scrubbers. Screw conveyor consists of five main elements:  

   
                            
  • Screw mechanism
  • Frame
  • Bearing housing and seal
  • Driving unit
  • Inspection and service hatches

 

Conveyor frame can be U-shaped or tubular, depending on the area of use. The frames can be constructed of carbon steel, acid-proof and stainless steel. Connections to other equipment or processes are also made of the same material. Screw mechanisms can be made of carbon steel, stainless or acid-resistant steel. Screw shafts have pipe-like coating of acid-resistant or stainless steel. Rotating spiral is welded onto the pipe-like coating of the shaft.

Slag crushers     

                                                                                                                                   

Crushers are used for crushing coarse lump materials. There are two types of crushers: rotor and roller types. Rotor crushers are used for primary crushing, and roller crushers are used for the secondary crushing, after which the material is suitable for the transport of pneumatically. Typical materials that are subject to fragmentation - is slag waste heat recovery, clumps of dust and other materials lumps that are formed during the process. Performance data crushers up to 30 t / h In serial installation they can process the material with pieces up to 300 mm and get the output fraction of no more than 5 x 5 mm. If necessary, may crushers cooling water, compressed air or steam. 

Unloading stations

There are two types of unloading stations: with dry or wet unloading device. Both discharge systems are located under the bottom section of the storage silo.

 

 

 

Wet handling device used to load bulk material from the silo into open trucks. Dry handling units are designed for loading closed containers, tanks. At the bottom of the silo is a fluidizing panels and slides that facilitate unloading.

 

Dust-free Loading Spout

 

Dustless loading spout is used when loading the open and closed trucks, big bags. Load performance can be up to 100 t / h Guides cones inside the sleeves are made of stainless steel. The sleeve is easily raised and lowered by ropes. Housing cover is made of steel. In the frame tube is winding device for removing dust. It is equipped with butterfly valve with pneumatic actuator.

 

Benefits of mechanical conveying:                                                                   

  • High performance
  • Suitable for coarse, sticky and large size materials
  • Reliable for heavy duty applications
  • Suitable for high temperatures
  • Low maintenance costs
  • Long life
  • Low power consumption
  • Relatively affordable costs

 

Transport Systems for Bulk Material 

Belt Conveyors 

Conveyor belts are among the most widely used transport systems for bulk materials due to their simplicity and low cost of construction. Thanks to their high reliability and easy of use, belt conveyors are the primary means of transporting bulk materials.  

 

 

 

 

 

 

 

 

 

 

 

Long distance conveyor belts are one of the varioties. They differ not only in length, but also the ability to change the direction of the belt, at an angle up or down, as well as with the given configuration of the terrain. to date, teh construction of the longest conveyor line is about 20km. 

 

Main Technical Data:

  • Width from 500 to 3200 mm
  • Maximum angle from 17 to 20 degrees, depending on flow and viscosity of the            material transported
  • Capacity of up to 40t /hr
  • Belt speed of 15m /second

 

Pipe Conveyors

 

        

The construction of the pipe conveyor is similar to the conventional through conveyors, namely they consist of a drive station  with the drum drive, return drive with return the drum and tensioning system. They vary in shape and construction from the thorough belt conveyor. The pipe conveyor has a bending  zone in which the upper belt is formed into a  tubular shape and the bottom belt returns to original shape.  The part of the conveyor  route along which the belt is in the tubular form  may have horizontal or vertical bends, as well as their spatial combination.

 

Main Technical Data:

  • Pipe diameter: 150 to 600 mm
  • Length: up to 10 km
  • Capacity: up to 800m3 /hour                                                                                             

 

The advantages of tubular conveyors:


•Closed transportation inside the tube eliminates rash material that has a positive effect on the environment and ecology.

•The use of a curved paths eliminates the need for complex transportation systems conveyors

•The opportunity to increase the angle of inclination of the conveyor by approximately 50% due to the transportation of the material within a closed pipe.

Vertical Conveyor Belt

 

       

 

The idea of transport in this type of conveyor is based on a special belt. This belt is made of a base belt (similar to that in trough conveyors), with two sidewalls and cleats  between them forming a kind of buckets, in which material is transported. The second type of belt used in this type of belt conveyors is the pocket belt consisting of, the base belt with attached pockets in which material is transported.

These conveyors can lift material vertically to great heights and at different angles, occupying relatively little space. They require much less energy and are less noisy compared to traditional bucket conveyors..

 

Main Technical Data:

  • Strap width: from 600 to 2000mm
  • Capacity: 6000 t/hour
  • Lift height up to 300m