دسته بندی | شیمی |
بازدید ها | 24 |
فرمت فایل | docx |
حجم فایل | 50 کیلو بایت |
تعداد صفحات فایل | 20 |
ترجمه مقاله بررسی نصب سنسورهای pH همراه با متن لاتین SENSOR INSTALLATIONS
Industrial pH sensors can be installed in the process piping, immersed in a tank or basin, or placed in a sidestreamsample. In a sidestream, a portion of the process liquid is continuously removed from the main process and directedto the pH sensor. Sidestream systems are necessary when the temperature and pressure of the process liquidexceed the sensor rating. The sample is cooled and the pressure reduced before the liquid reaches the sensor. Ina sidestream, the sample can either be returned to the process or drained to waste. Retractable sensors, whichcan be removed from the process piping without shutting down the system, are also popular.6.2 SAFETYThere are safety hazards associated with pH sensors installed in process streams. If the temperature or pressureof the liquid exceeds the rating of the sensor, the sensor may fail, allowing the process liquid to leak out fromaround the sensor. There are special hazards associated with retractable sensors. To avoid accidents, always followthe manufacturer's instructions for inserting and removing the sensor. Never attempt to remove a retractablesensor unless the process conditions meet the manufacturer’s requirements. Also, install retractable sensors onlyin places where access is easy and the person retracting the sensor has good footing.
Industrial pH sensors can be installed in the process piping, immersed in a tank or basin, or placed in a sidestreamsample. In a sidestream, a portion of the process liquid is continuously removed from the main process and directedto the pH sensor. Sidestream systems are necessary when the temperature and pressure of the process liquidexceed the sensor rating. The sample is cooled and the pressure reduced before the liquid reaches the sensor. Ina sidestream, the sample can either be returned to the process or drained to waste. Retractable sensors, whichcan be removed from the process piping without shutting down the system, are also popular.6.2 SAFETYThere are safety hazards associated with pH sensors installed in process streams. If the temperature or pressureof the liquid exceeds the rating of the sensor, the sensor may fail, allowing the process liquid to leak out fromaround the sensor. There are special hazards associated with retractable sensors. To avoid accidents, always followthe manufacturer's instructions for inserting and removing the sensor. Never attempt to remove a retractablesensor unless the process conditions meet the manufacturer’s requirements. Also, install retractable sensors onlyin places where access is easy and the person retracting the sensor has good footing.
1 مقدمه
سنسورهای pH صنعتی را میتوان در خطوط لوله فرایند نصب نمود، درون مخزن یا حوضه آبگیر غوطهور ساخت، یا درون یک نمونه ریز آبه قرار داد. در یک ریز آبه، بخشی از مایع فرایند به طور پیوستهای از فرایند اصلی جدا شده و به سمت سنسور pH هدایت میگردد. زمانی که دما و فشار مایع فرایند از درجهبندی مجاز سنسور فراتر میرود، سیستمهای ریز آبه موردنیاز میباشند. پیش از رسیدن نمونه به سنسور، آن را سرد کرده و فشار را کاهش میدهند. در یک ریز آبه، میتوان نمونه را به فرایند بازگرداند و یا به فاضلاب تخلیه نمود. سنسورهای قابل استرداد، که میتوان بدون متوقف نمودن سیستم آنها را از خطوط لوله فرایند جدا نمود، نیز محبوبیت دارند.
6.2 ایمنی
مخاطراتی ایمنی در ارتباط با سنسورهای pH نصب شده در جریانات فرایند وجود دارد. اگر دما و یا فشار مایع از درجهبندی مجاز سنسور فراتر رود، سنسور عمل نخواهد کرد، و درنتیجه مایع از اطراف سنسور به بیرون نشت خواهد نمود. مخاطرات ویژهای نیز وجود دارند که مربوط به سنسورهای قابل استرداد هستند. برای پرهیز از هرگونه حادثه، همواره از دستورالعملهای سازنده برای قرار دادن و جدا نمودن سنسورها پیروی کنید. هیچگاه، جز در حالتی که شرایط فرایند با مشخصات و ملزومات سازنده در انطباق باشد، اقدام به جداسازی سنسور ننمائید. همچنین، سنسورهای قابل استرداد را تنها در محلهایی نصب کنید که دسترسی به آنها آسان است و فرد جداکنندهی سنسور، اتکا و وضعیت مناسبی دارد.
Industrial pH sensors can be installed in the process piping, immersed in a tank or basin, or placed in a sidestreamsample. In a sidestream, a portion of the process liquid is continuously removed from the main process and directedto the pH sensor. Sidestream systems are necessary when the temperature and pressure of the process liquidexceed the sensor rating. The sample is cooled and the pressure reduced before the liquid reaches the sensor. Ina sidestream, the sample can either be returned to the process or drained to waste. Retractable sensors, whichcan be removed from the process piping without shutting down the system, are also popular.6.2 SAFETYThere are safety hazards associated with pH sensors installed in process streams. If the temperature or pressureof the liquid exceeds the rating of the sensor, the sensor may fail, allowing the process liquid to leak out fromaround the sensor. There are special hazards associated with retractable sensors. To avoid accidents, always followthe manufacturer's instructions for inserting and removing the sensor. Never attempt to remove a retractablesensor unless the process conditions meet the manufacturer’s requirements. Also, install retractable sensors onlyin places where access is easy and the person retracting the sensor has good footing.