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Introduction

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Project
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The Project is unique in that it is a demonstration of environmentally friendly Zero-Liquid-Discharge solution in the province like Tianjin where discharge of brine into Bohai Bay is prohibited based on environmental concerns. It uses the concentrated brine solution to produce salt chemicals. After completion, it will become China's biggest seawater desalination project. This Project has been listed as one of the 20 projects under the Tianjin Government's 2013 10th batch Significant Industrial Projects and one of the 110 projects under the (Tianjin Marine Economy Demonstration Area of Scientific Development Planning).


This integrated project consists of five sub projects of seawater clarification, seawater desalination, pure water production from brine solution, salt and chemical making. 


The capacity of the first phase is: Clarified water 1 million m3/d; Desalinated water 135,000 m3/d; Pure water 120,000 m3/d; Fine salt 2.4 million ton/year and Chemicals about 1 million ton/year. This Project utilises a land area of 500 mu.


Special features of the project are:

Full utilisation of seawater resources with zero discharge and free from pollution
Clarified water will be supplied to consumers where heat generated in the cooling process is recovered for further utilisation.
Recovery of seawater through Reverse Osmosis is 65% as compared with others which are 40-45%. This reduces the consumption of electricity used. 
Application of mechanical compression and anti-scaling method of calcium removal enable the concentration of brine to be raised from 9°Bé to 25°Bé. This result in the salt and chemical elements can be extracted subsequently.
Purity of refined salt is above 99.5% which is much higher than the mineral salt and salt produced through salt fields. This facilitates a higher commercial value.



Other features are:
This project is an important component in Nangang Industrial Zone development.


The continuous development of the petrochemical industries of Nangang ensures the demand of water and salt. 


This is a pioneer and model project in seawater desalination with completely zero liquid discharge which is eco-friendly.


The tangible benefit is relieving the salt fields of Tianjin (Tianjin has 300 km² salt fields producing 2.35 million ton of salt a year, about the same quantity of this project).


The construction of this project has a remarkable social benefit and will become a role model for future desalination project.


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