Water. Desalination + reuse
Issue link: https://fhpublishing.uberflip.com/i/86284
REGIONS industrial enterprises and local government, such as industrial park management committees and local water companies. In recent years, some large-scale projects have tried the build-own-transfer (BOT) construction model, for example, Tianjin Dagang Seawater Desalination Plant (first phase) was constructed by Hyflux, adopting the BOT model; Caofeidian Seawater Desalination Project (first phase) was built by a joint-venture company comprising Beijing Enterprises Water Group Limited (BEWGL), Aqualyng and the local management committee; Qingdao BCTA Desalination Plant, which is under construction, was an investment by Befesa Construction Company of Spain, and so on. APPLICATION OF DESALINATION PLANTS At present, China's desalination plants are mainly distributed in areas of severe water shortages, especially in north coastal areas, such as Tianjin City, Liaoning Province, Shandong Province, Hebei Province, and islands in Zhejiang Province. China's desalination market has Industrial Park of Hebei province, both discharge brine to a salt field for salt manufacturing. The desalination project at Qingdao Soda Ash Industrial Co Ltd is the first project to develop soda ash manufacture from seawater desalination. Soda ash is made using salt from brine with combined heat and power integration. This model maximizes the utilization of resources. The brine after desalination contains a high concentration of sodium chloride, used as the raw material for production of soda ash to save large quantities of industrial salt and tap water. formed a specific pattern after decades of development, being mainly used in the power, petrochemical and steel industries; coastal industrial enterprises; and municipal water supplies. The desalination capacity for the power DESALINATION GOALS Recently, in order to support the development of seawater desalination industry, the Chinese government issued a number of policies. The Guiding Opinions of the General Office of the State Council on Accelerating the Desalination Industry, issued by General Office of the State Council in February 2012, lists the development goals of the 12th Five-Year Period in the desalination industry. China aims to increase its desalination capacity to 2.2-2.6 million m3 industry accounts for 52.6% of China's total desalted water capacity. Until now, there have been few cases of desalted water being added to city water supply networks. But in July 2012, when Qingdao BCTA Desalination Plant (100,000 m3 supply desalination project, is completed, the desalted water will go directly into the municipal water supply pipe network, to meet the daily water consumption of 500,000 people. BRINE DISCHARGE Because the Chinese government has very strict restrictions on brine discharge, extensive research on comprehensive utilization of brine has been carried out in China, and some of the results have been applied in a number of desalination projects. The country has been in the forefront of the world in this field. There are various methods for using /d), China's largest urban water By that time, desalinated seawater will contribute to over 50% of newly increased water supplies in islands, and over 15% to newly-increased industrial water supply in coastal areas short of water. In addition, the Chinese government /d by 2015. KEY PROJECTS The following are photos and introductions to Caofeidian Seawater Desalination Project and Tianjin Dagang Desalination Project. Caofeidian Seawater Desalination Project Total capacity 50,000 m3 /d Date commissioned October 2011 Product recovery 45% Feedwater TDS 33,000~36,000 mg/L Product water TDS <500 mg/L (first pass) Feedwater temperature 0~32ºC RO process description One-pass Operating pressure 5.5~6.8 MPa Energy recovery device PX-220 Seawater intake Intake pipe is paying high attention to indigenous innovation for the domestic desalination industry, with over 70% of raw materials and equipment manufacture expected to be developed domestically by 2015. The government also mentioned other development targets. For example, it will seek to perfect an industrial chain for desalination, improving key technologies, equipment, materials, research and development, and manufacturing capabilities to reach an advanced international level. Furthermore, the government will take a series of support measures using fiscal and taxation policies, and implement financial and price support policies. According to the statement, by brine in China. For example, Zhoushan Liuheng SWRO Desalination Plant and Caofeidian Seawater Desalination Project, which have been built respectively at Zhoushan in Zhejiang and Caofeidian demonstration projects of 10,000 m3 2015, China will complete two national desalination demonstration projects of 50,000-100,000 m3 /d, 20 desalination level, and five brine-utilization demonstration projects. These would be of great significance in promoting the development of the desalination industry in China. /d Pretreatment system DAF dissolved air flotation + UF Post-treatment system Remineralization, pH adjustment Concentrate disposal Discharge into Nanpu salt field Project total investment ¥ 430 million (US$ 68 million) System equipment supplier Hangzhou Water Treatment Technology Development Centre Major product vendors Toray, Aqualyng, Inge, KSB, ROPV Assembly company Hangzhou Water Treatment Technology Development Centre Designer Hangzhou Water Treatment Technology Development Centre The Aqualyng BEWG Caofeidian Desalination Project is the start-up project for the desalination industry development base being built in Caofeidian by Beijing Enterprises Group (BG). According to its introduction, the project's total investment is approximately ￥430 million (US$ 68 million), with Aqualyng BEWG Desalination Co Ltd and Aqualyng BEWG Caofeidian Water Investment Co Ltd, each owning 50% of shares. The offtaker, May-June 2012 | Desalination & Water Reuse | 29 |