كليدواژه :
ﺑﺮج ﺧﻨﮏﮐﻨﻨﺪه , ﺧﻮردﮔﯽ اﮐﺴﯿﮋﻧﯽ , اﮐﺴﯿﮋن ﻣﺤﻠﻮل , ﺑﺎﮐﺘﺮيﻫﺎي ﻫﻮازي , ﻓﺘﻮﺳنتر
چكيده فارسي :
در اﯾﻦ ﭘﮋوﻫﺶ ﻧﺤﻮة ﻋﻤﻠﮑﺮد ﯾﮏ ﻧﻤﻮﻧﻪ ﺑﺮج ﺧﻨﮏﮐﻨﻨﺪه ارزﯾﺎﺑﯽ و ﺑﺮرﺳﯽ ﺷﺪه اﺳﺖ. ﻫﻤﺎن ﻃﻮر ﮐﻪ ﻣﯽداﻧﯿﻢ، ﯾﮑﯽ از ﭘﺎراﻣﺘﺮﻫﺎي ﻣﻬﻢ در ﺑﺤﺚ ﺧﻮردﮔﯽ اﮐﺴﯿﮋﻧﯽ ﻣﺮﺑﻮط ﺑﻪ ﺻﻨﺎﯾﻊ ﭘﺎﻻﯾﺶ، ﮔﺎز و ﭘﺘﺮوﺷﯿﻤﯽ، ﻣﯿﺰان اﮐﺴﯿﮋن ﻣﺤﻠﻮل در آب اﺳﺖ. ﺑﻪﻃﻮر اﺳﺎﺳﯽ ﻫﺮﭼﻪ ﻣﯿﺰان اﯾﻦ ﭘﺎراﻣﺘﺮ ﺗﻘﻠﯿﻞ ﯾﺎﺑﺪ، ﻧﻘﺶ ﻣﺆﺛﺮي در ﺑﻬﺒﻮد ﻋﻤﻠﮑﺮد ﺳﯿﺴﺘﻢﻫﺎي ﺧﻨﮏﮐﺎري، ﻧﻈﯿﺮ ﻣﺒﺪلﻫﺎي ﺣﺮارﺗﯽ، ﺑﺮجﻫﺎي ﺧﻨﮏﮐﻨﻨﺪه ﺧﻮاﻫﺪ داﺷﺖ. ﺑﺮ اﯾﻦ اﺳﺎس، در اﯾﻦ ﻃﺮح ﺑﺎ اﺳﺘﻔﺎده از ﯾﮏ ﺑﺮج ﺧﻨﮏﮐﻨﻨﺪه در ﻣﻘﯿﺎس ﭘﺎﯾﻠﻮت، ﻣﻘﺪار اﮐﺴﯿﮋن ﻣﺤﻠﻮل در آب ﺣﻮﺿﭽﮥ اﯾﻦ ﺑﺮج در دو ﺣﺎﻟﺖ ﺑﺪون اﺳﺘﻔﺎده از ﺗﻮپ و ﻫﻤﺮاه ﺑﺎ ﺗﻮپ، ﻣﺤﺎﺳﺒﻪ و ﻣﻘﺎﯾﺴﻪ ﺷﺪه اﺳﺖ؛ ﺑﻪ اﯾﻦ ﺗﺮﺗﯿﺐ ﮐﻪ ﺑﺎ ﺷﻨﺎورﺳﺎزي ﺗﻮپﻫﺎي ﭘﯿﻨﮓﭘﻨﮓ ﺑﺎ رﻧﮓ ﻣﺸﮑﯽ روي ﺳﻄﺢ آب ﺣﻮﺿﭽﻪ در ﺑﺮج ﻣﺬﮐﻮر، ﻧﻮﻋﯽ ﻣﻘﺎوﻣﺖ در ﺑﺮاﺑﺮ ﻧﻮر ﺧﻮرﺷﯿﺪ و ﻫﻤﭽﻨﯿﻦ در ﺑﺮاﺑﺮ ﺑﺮﺧﻮرد ﻣﺴﺘﻘﯿﻢ ﻗﻄﺮات آب ﺧﻨﮏﺷﺪه از ﻗﺴﻤﺖ ﻓﻮﻗﺎﻧﯽ ﺑﺮج ﺑﻪﺳﻤﺖ حوضچه، ايجاد شد. نتايج حاصل از اين تحقيق مربوط به حالتي كه از توپ استفاده شده، بيانگر كاهش ميزان DO در ﺷﺮاﯾﻂ ﯾﮑﺴﺎن)دﻣﺎي 23 و ﻓﺸﺎر 1atm(، از mg/l 8/6 ﺑﻪ mg/l 6/5 اﺳﺖ. اﯾﻦ ﻣﻘﺪار)mg/l 6/5(، در ﺣﺎﻟﺖ واﻗﻌﯽ ﺑﻬﺮهﺑﺮداري از ﯾﮏ ﺑﺮج ﺧﻨﮏﮐﻨﻨﺪه در دﻣﺎي ﺣﺪود 30 ﻣﯽﺗﻮاﻧﺪ ﺑﯿﺸﺘﺮ ﮐﺎﻫﺶ ﯾﺎﺑﺪ. ﮐﺎﻫﺶ اﯾﻦ ﭘﺎراﻣﺘﺮ)DO( اﺛﺮ ﻣﺜﺒﺘﯽ ﺑﺮ ﮐﺎﻫﺶ ﻓﻌﺎﻟﯿﺖ ﺑﺎﮐﺘﺮيﻫﺎي ﻫﻮازي و ﻗﺎرچﻫﺎ ﺧﻮاﻫﺪ داﺷﺖ. ﻫﻤﭽﻨﯿﻦ ﻗﺮارﮔﺮﻓﺘﻦ اﯾﻦ ﺗﻮپﻫﺎ در ﮐﻨﺎر ﻫﻢ ﺑﺮ روي ﺳﻄﺢ آب ﺣﻮﺿﭽﻪ، ﻣﯿﺰان ﻧﻮر ﻣﻮرد ﻧﯿﺎز ﻗﺎرچﻫﺎ ﺑﺮاي اﻧﺠﺎم ﻋﻤﻞ ﻓﺘﻮﺳﻨﺘﺰ را ﮐﺎﻫﺶ ﻣﯽدﻫﺪ و از ﺷﺪت رﺷﺪﺷﺎن ﺑﻪﺷﮑﻠﯽ ﻣﻄﻠﻮب ﻣﯽﮐﺎﻫﺪ. ﻋﻼوه ﺑﺮ اﯾﻦ، ﻫﺮﭼﻪ ﻣﻘﺪار اﮐﺴﯿﮋن ﻣﺤﻠﻮل در آب ﮐﺎﻫﺶ ﯾﺎﺑﺪ، در ﻣﻘﯿﺎس ﺻﻨﻌﺘﯽ ﻣﯽﺗﻮاﻧﺪ ﻣﻨﺠﺮ ﺑﻪ ﮐﺎﻫﺶ ﻣﺼﺮف ﻣﻮاد ﺷﯿﻤﯿﺎﯾﯽ ﺗﺰرﯾﻘﯽ ﺑﻪ آب Basing ﺷﻮد
چكيده لاتين :
In this research, the performance of a water cooling tower has been evaluated. As we know, one of the most important parameters in the discussion of oxygen corrosion in the refining, gas and petrochemical industries is the amount of dissolved oxygen in water. Basically, the lower this parameter will have an effective role in improving the performance of cooling systems such as heat exchangers, cooling towers. Accordingly, in this project, using a pilot scale cooling tower, we compared and compared the amount of water-soluble oxygen in the pond of this tower in two non-use balls and with a ball. It was created by floating black ping pong balls on the surface of the pond of the tower, a kind of resistance to sunlight, and also against the direct collision of water drips from the upper part of the tower toward the pond. The results of this study related to the condition of the ball used indicate a decrease in DO in the same conditions (temperature of 23
and atm1) from 8.6 mg/l to 6.5 mg/l. This amount (6.5mg/l), in real mode, the operation of a cooling tower at a temperature of about 30℃ can be further reduced. Reducing this parameter (DO) will have a positive effect on reducing the activity of aerobic bacteria and fungi. Also, placing these balls together on the water surface of the pond decreases the amount of light required by the fungi to perform the photosynthesis operation and reduces their growth intensity in a desirable manner. In addition, the lower the amount of dissolved oxygen in water, the industrial scale can reduce the consumption of injectable chemicals into water.
Keywords: Cooling Tower, Oxygen Corrosion, Dissolved Oxygen, Aerobic Bacteria, Photosynthesis
