SUPERHEATING DEVICE

• Main Authors: OKAZAKI KYOJI, SUGANO AKIHITO, KAYAMA TAKAHIRO, CHANG QING-YI
• Format: Patent
• Language: English; Japanese
• Published: 13.04.2017
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; STEAM GENERATION; SUPERHEATING OF STEAM; WEAPONS

PROBLEM TO BE SOLVED: To provide a superheating device capable of preventing corrosion of a superheater tube in a simple control process, without measuring a tube wall temperature of the superheater with a thermometer.SOLUTION: A primary controller 15 of a superheating device 1 compares a secondary superheater inlet temperature difference obtained by subtracting a measurement temperature of a secondary superheater inlet thermometer 11 from a predetermined secondary superheater inlet setting temperature with a secondary superheater outlet temperature difference obtained by subtracting a measurement temperature of a secondary superheater outlet thermometer 18 from a predetermined secondary superheater outlet setting temperature; when the secondary superheater inlet temperature difference is made larger, adjusts a supply amount of cooling water in a primary desuperheater 9 based on the measurement temperature of the secondary superheater inlet thermometer 11 so that the secondary superheater inlet temperature becomes the secondary superheater inlet setting temperature; and when the secondary superheater outlet temperature difference is made larger, adjusts the supply amount of cooling water in the primary desuperheater 9 based on the measurement temperature of the secondary superheater outlet thermometer 18 so that the secondary superheater outlet temperature becomes the secondary superheater outlet setting temperature.SELECTED DRAWING: Figure 1 【課題】過熱器の管壁温度を温度計で計測する必要がなく、簡単な制御工程で過熱管の腐食を防止できる過熱装置を提供する。【解決手段】過熱装置１の一次制御装置１５は、所定の二次過熱器入口設定温度から二次過熱器入口温度計１１の計測温度を差し引いて得られる二次過熱器入口温度差と、所定の二次過熱器出口設定温度から二次過熱器出口温度計１８の計測温度を差し引いて得られる二次過熱器出口温度差とを比較して、二次過熱器入口温度差の方が大きいときには、二次過熱器入口温度が二次過熱器入口設定温度となるように、二次過熱器入口温度計１１の計測温度に基いて一次減温器９での冷却水の供給量を調整し、二次過熱器出口温度差の方が大きいときには、二次過熱器出口温度が二次過熱器出口設定温度となるように、二次過熱器出口温度計１８の計測温度に基いて一次減温器９での冷却水の供給量を調整する。【選択図】図１