Quality guarantees safety
Quality guarantees safety
Quality guarantees safety
Quality guarantees safety
Quality guarantees safety
CZŁONEK ODLEWNICZEJ IZBY GOSPODARCZEJ
Environmental protection

DEDUSTING OF FOUNDRY CUPOLAS and the EU Funds

Thanks to the financial assistance from the  The National Fund for Environmental Protection and Water Management and the European Regional Development Fund, we have implemented project WKP_1/2.4.1/4/2006/21/113 'Cold-air-blowing foundry-cupolas dedusting-system modernisation to meet the integrated permit and NDT requirements in the Bydgoszcz Iron Foundry' as part of the Sectoral Operational Programme Improvement of the Competitiveness of Enterprises for 2004-2006, Priority 2: Direct Support for Enterprises', Measure 2.4: Measure 2.4: Support for investments adapting enterprises to environmental protection standards.

The dry dedusting method has been applied for dedusting postreaction gases from the foundry cupolas operating alternatively. The dedusting system involves:

·      covers of top parts of the foundry cupolas automatically closed with tilting flaps;

·      piping system with automatically-controlled throttle valves to switch the draft from respective foundry cupolas and the intake of cool air to combustion gases;

·      extraction gases cooler;

·      cyclones battery;

·      bag filter;

·      extraction fan;

·      stack.

DRY DEDUSTING OF THE MOULDING SAND.

The dry dedusting consists of the following sub-assemblies: an extraction fan, filter with a stack, cyclone battery,, extraction channel for the pure air, the compressed air system, dust collection system, control system. The JET-SET bag filter is the main element cleaning the air – there takes place the cleaning of the air of dust generated as a result of the preparation, formation and transportation of the moulding sand in the Foundry Plant. The dust separated during the filtering process falls down to chutes and then, via a worm conveyor – through the valve and then it is transferred to typical containers.

The following extraction and dedusting installations have been connected to this installation with the help of pipe connectors:

DRY DEDUSTING OF THE MOULDING SHOP AND THE SHAKE SCREEN.

The dry dedusting consists of the following sub-assemblies: an extraction fan, filter with a stack, cyclone battery, extraction channel for the pure air, the compressed air system, dust collection system, control system. The JET-SET bag filter is the main element cleaning the air – there takes place the cleaning of the air of dust generated as a result of the preparation, formation and transportation of the moulding sand in the Foundry Plant. The dust separated during the filtering process falls down to chutes and then, via a worm conveyor – through the valve and then it is transferred to typical containers.

The following extraction and dedusting installations have been connected to this installation with the help of pipe connectors:

RAINWATER

The foundry has carried out an investment entailing a creation of a separate system for the discharge of social and existential sewage and a separate system for the discharge and management of the rainwater. The rainwater are directed with a separate installation to tanks, where it is cleaned, and then utilized for production purposes in the Foundry Plant. A possible surplus of the cleaned water is discharged into the soil.

Process

Dirty gases are collected from over the tuyere windows in the foundry cupolas stacks and they pass through the piping system where the combustion gases are mixed with cool air and the gases is cooled down to 500ºC and the combustion gases are discharged to the extraction gas cooler. The cooler is to lower the combustion gases temperature from 500ºC down to 130ºC. The pipe cooler is the first dedusting stage. It ends with a closed chute with two-flap pass. The flow of the cooling air is forced with axial fans. Between the cooler and the filter you will find the cyclone battery which mostly secures the filter from unburnt dust and glowing sparks. Yet another system component is the bag filter, selected to ensure the maximum gas flow of 41.500 m3/h and the maximum temperature of 130ºC. The filter ends up with two chutes closed with gap-locks and is equipped with compressed-air regeneration. The filtration  material is made up of the needleloom felt, resistant to mechanical damage. Due to increased erosion potential of extracted gases, the filtration material has been surface-treated to  increase the bag resistance. 

Dust from all the dedusting facilities is discharged into the Big Bags and transported to a dumping site.

 

  • Dedusting and extraction system; 2 coolers,
  • Dedusting and extraction system; a homogenizer,
  • Dedusting and extraction system; moulding mass,transporting conveyors,
  • Dedusting and extraction system; mass processing plant

 

 

 

  • Dedusting and extraction system; 2 Disamatic moulding lines,
  • Dedusting and extraction system; vibrating screens.

 

 

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