{"public_id":"cl_6d2568bd44dc41cee697bcbdc59143d9","status":"active","superseded_by_public_id":null,"corpus_id":224840757,"text":"An optimized arrangement for the 600-MWe down-fired lean coal boiler uses the original tertiary air moved down, the secondary air jet angle of the A layer set to 20° downdip, the secondary air F layer and tertiary air set to 20° and 30° downdip, and separated over-fire air placed in the upper furnace at a 20% ratio with a 30° jet angle.","confidence":0.98,"paper":{"corpus_id":224840757,"title":"Investigations on combustion optimization and NOX reduction of a 600-MWe down-fired boiler: Influence of rearrangement of tertiary air and jet angle of secondary air and separated over-fire air","url":"https://sah.borca.ai/papers/224840757"},"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"origin_summary":{"object_type":"claim","status":"active","confidence":0.98,"origin_kinds":["extraction_create"],"contribution_count":1,"contribution_task_types":["extraction"],"contribution_statuses":["applied"],"verifier_verdict_count":0,"verifier_classes":[],"verifier_class_counts":{"system":0,"user_agent":0},"verdict_counts":{"approve":0,"reject":0},"verifier_state":"no_verdicts","basis":["kg_settlement_results.decision_payload.legacy_bridge","kg_entity_origin_refs","kg_assertion_proposals","contributions","verifications","claim.status","claim.confidence"],"limits":["ledger provenance is aggregated; raw contribution and verifier audit rows are not expanded","entity matching uses settlement bridge refs and edge commands"]},"concepts":[{"public_id":"co_46a323cfa4dd8d357dfdf0070e6984e3","name":"tertiary air","description":"Additional combustion air supplied to the boiler after the primary and secondary air streams.","types":["process parameter"],"url":"https://sah.borca.ai/concepts/co_46a323cfa4dd8d357dfdf0070e6984e3"},{"public_id":"co_46c5a7d475a379bfe882f541c361f29b","name":"600-MWe down-fired lean coal boiler","description":"A 600-megawatt electric down-fired boiler firing lean coal.","types":["system"],"url":"https://sah.borca.ai/concepts/co_46c5a7d475a379bfe882f541c361f29b"},{"public_id":"co_b8229d245bd808103f706c4c07b5715b","name":"separated over-fire air","description":"Over-fire air supplied through separate ports above the main combustion zone.","types":["process parameter"],"url":"https://sah.borca.ai/concepts/co_b8229d245bd808103f706c4c07b5715b"}],"related_claims":[],"url":"https://sah.borca.ai/claims/cl_6d2568bd44dc41cee697bcbdc59143d9"}