DENITRATION AGENT INJECTION DEVICE AND DENITRATION UNIT

• Main Authors: ODA MANABU, MIYANISHI HIDEO, KUSHIOKA KIYONORI
• Format: Patent
• Language: English; Japanese
• Published: 04.06.2015
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide a denitration agent injection device and a denitration unit capable of efficiently diffusing a denitration agent and mixing the denitration agent with exhaust gas with a simple configuration.SOLUTION: A denitration-agent injection device for injecting a denitration agent into an exhaust pipe in which exhaust gas flows, includes: a denitration-agent supply source supplying the denitration agent; a denitration-agent injection pipe including an injection nozzle formed in a part inserted into the exhaust pipe, and injecting the denitration agent supplied from the denitration-agent supply source from the injection nozzle into the exhaust pipe; and a diffusion acceleration mechanism fixed to the denitration-agent injection pipe and accelerating diffusion of the denitration agent. In a view from an extension direction of the denitration-agent injection pipe, the diffusion acceleration mechanism is a plate member that is arranged at least in an entire region upstream, in a flow direction of exhaust gas, of an outer circumference of the denitration-agent injection pipe, and that is inclined with respect to a direction orthogonal to the extension direction. 【課題】簡単な構成で脱硝剤を効率よく拡散でき、脱硝剤と排ガスとを混合させることができる脱硝剤注入装置及び脱硝ユニットを提供すること。【解決手段】排ガスが流れる排気管に脱硝剤を注入する脱硝剤注入装置であって、脱硝剤を供給する脱硝剤供給源と、排気管に挿入され、かつ、排気管に挿入されている部分に注入ノズルが形成され、脱硝剤供給源から供給される脱硝剤を注入ノズルから排気管内に注入する脱硝剤注入管と、脱硝剤注入管に固定され、脱硝剤の拡散を促進する拡散促進機構と、を有し、拡散促進機構は、脱硝剤注入管の延在方向から見た場合、脱硝剤注入管の外周のうち、少なくとも排ガスの流れ方向上流側の全域に配置され、かつ、延在方向に直交する方向に対して傾斜している板状部材である。【選択図】図３