Is it economical and reasonable to use seawater for heat exchange with the closed-loop water system in chemical enterprises located by the sea?
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The chemical plant we have in Fujian is considering using seawater for heat exchange with a closed-loop water system, as a replacement for the traditional cooling tower-based water circulation system. The flow rate of water in this system is 50,000 tons per hour, and the plant is located about 1 km from the sea. I was wondering if it’s economically viable, experts?
This is the most economical and reasonable way, without a doubt.
It’s mainly about corrosion issues and long-distance transportation problems, I guess
The technology should be feasible; I wonder if there are any advantages in terms of investment and operational cost efficiency?
The technology should be feasible; I wonder if there are any advantages in terms of investment and operational cost efficiency?
1. The circulating water volume is 50,000 tons per hour, with 8,000 hours of operation per year. Assuming 70% of the water is reused and 30% is discharged, and considering an industrial water cost of 2.5 yuan per ton as well as a wastewater treatment fee of 5 yuan per ton, the annual operating cost amounts to 50,000*8,000*2.5 + 50,000*8,000*0.3*5 = 1.06 million yuan. With a device lifespan of 15 years, the total water cost over that period is 15.9 million yuan； 2. Lay 1 km of seawater pipeline. Considering a 1KM corrosion-resistant pipeline costing 1 million yuan, land use costs along the pipeline estimated at 200,000 yuan, annual costs for discharging seawater at 100,000 yuan, and a device lifespan of 15 years, the total investment plus operating costs amounts to 2.7 million yuan ；
Sir, the result of the calculation for the first point is already in hundreds of millions, and I’m a bit confused and don’t understand it. Could you please explain it? Thank you.
Sir, the result of the calculation for the first point is already in hundreds of millions, and I’m a bit confused and don’t understand it. Could you please explain it? Thank you.
Sir, the result of the calculation for the first point is already in hundreds of millions, and I’m a bit confused and don’t understand it. Could you please explain it? Thank you.
Sir, the result of the calculation for the first point is already in hundreds of millions, and I’m a bit confused and don’t understand it. Could you please explain it? Thank you.
This post was last edited by goldliyang on 2017-10-24 at 13:31. Online monitoring in the chemical industry enables real-time control via DCS, just like in the case of temperature and pressure.