2.8.21 Bag Filters

2.8.21               Bag Filters

 

                        The bag filter unit shall be placed above all the buffer/ interme­diate hoppers, and the main ash storage silos. In case of storage silos and buffer/ intermediate hoppers for pressure conveying system, the bidder should provide exhaust fans to assist venting.

 

                        Because of the stringent duty conditions, it should be possible to carry out the maintenance and replacement of the bags without affecting the performance of the system.

 

                        The Bidder shall justify in his bid, the air to cloth ratio selected, the bag material, the ability to with­stand the vacuum, pressure and temperature, the mainte­nance and replacement procedures of the damaged bags.

 

                        The performance of the bag filter shall not get affect­ed with 10% of the bags plugged.  This condition shall be demonstrated by the Contractor at site under actual working conditions.

 

                        The bag filter unit shall be designed to achieve as sustained outlet dust emission of 50 mg/NM³ (maximum).  The dust emission figure shall be guaranteed.

 

                        All bag filters and fans shall be installed under cover, and be protected from all potential adverse weather conditions.

 

                        All bag filters shall be supplied complete with auto­matic bag filter cleaning equipment, details of which shall be included in bid.

 

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