CREATION SUPPRESSION DEVICE OF HIGH-MELTING POINT PIPING BLOCKAGE SUBSTANCE AND METHOD

• Main Authors: INABA TOSHIHARU, HATTORI NOZOMI
• Format: Patent
• Language: English; Japanese
• Published: 06.05.2022
• Subjects: AMMONIA; BLASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; CYANOGEN; 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; INORGANIC CHEMISTRY; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

To provide a creation suppression device of a high-melting point piping blockage substance which promotes the hydrolysis of an isocyanic acid and a cyanic acid, and reduces a creation amount of a cyanuric acid, and a method therefor.SOLUTION: In a creation suppression device of a high-melting point piping blockage substance, a urea water supply pipe 6 for supplying compressed air and urea water is inserted into piping in which an exhaust gas flows, a urea water spray nozzle 7 is connected to the vicinity of a tip of the urea water supply pipe 6, a mixture part 8 in which the exhaust gas flowing in the piping and sprayed urea water sprayed from the urea water spray nozzle 7 are mixed is arranged, a metal sheet 9 is peripherally entirely or partially formed at an inner wall face of the piping at a periphery of the mixture part 8 in a band shape, and a hydrolysis catalyst layer 10 for promoting the hydrolysis of urea is formed on an inner face of the metal sheet 9.SELECTED DRAWING: Figure 1 【課題】イソシアン酸やシアン酸の加水分解を促進して、シアヌル酸の生成量を減少させることにより、融点配管閉塞物質の生成抑制装置及び方法を提供すること。【解決手段】加圧空気と尿素水を供給する尿素水供給管６を排ガスが流れる配管内に挿通し、尿素水供給管６の先端近傍に尿素水噴霧ノズル７を接続し、配管内を流れる排ガスと、尿素水噴霧ノズル７から噴霧された噴霧尿素水との混合部８を有し、混合部８の周囲で配管の内壁面の全部または一部に、金属シート９を帯状に周設してなり、金属シート９の内面に、尿素の加水分解を促進する加水分解触媒層１０が形成されていることを特徴とする高融点配管閉塞物質の生成抑制装置。【選択図】図１