Brackish water supplement circulating and cooling system utilizing forward osmosis technology

Abstract

The invention discloses a brackish water supplement circulating and cooling system utilizing a forward osmosis technology. The system comprises a cooling tower, a technology heat exchanger, a waste heat recovery heat exchanger, a brackish water automatic chemical feeding device, a forward osmosis device, a pretreatment device, a brackish water feeding pump, a circulating water pump, a drawing agent supplement device and a filtering device, and a water pool below the cooling tower is connected with the drawing agent supplement device, the circulating water pump, a circulating and cooling water pipeline, the waste heat recovery heat exchanger and the technology heat exchanger through pipelines. An outlet of the brackish water feeding pump is connected with the pretreatment device, the technology heat exchanger and the forward osmosis device through pipelines. The system treats the brackish water for water supplement of the circulating and cooling system, and solves the running problems that the water quality of brackish water at various regions is different and unstable, it is only needed to add a necessary corrosion inhibitor and necessary biocide, and therefore the cost for usage of chemicals of a traditional system is lowered; heat in circulating water is fully utilized, and the efficiency of a forward osmosis system is improved; the water inlet temperature of the circulating cooling tower is decreased, and initial investment for the cooling tower is reduced.

Description

technical field [0001] The invention belongs to the technical field of circulating cooling, and in particular relates to a brackish water rehydration circulating cooling system utilizing forward osmosis technology. [0002] technical background [0003] my country's per capita water resources are only 1 / 4 of the global per capita water volume, and fresh water resources are scarce. China is one of the countries with the poorest per capita water resources in the world. Therefore, the efficient use, rational development and effective protection of water resources are important issues related to the sustainable development of my country's economic society. [0004] Brackish water refers to water sources in which the total concentration of various salts in the water is greater than 1000mg / L. The brackish water accounts for a very high proportion of the reserves of groundwater resources. According to the survey data, 29% of the groundwater resources in my country are brackish wate...

AI Technical Summary

Problems solved by technology

[0005] In areas where brackish water is widely distributed, due to the different types and salt content of brackish water in different regions, even the water quality of brackish water in the same area will change with time. , resulting in uncertainties such as material corrosion and scaling will lead to changes in the dosing scheme of the circulating cooling system and uncertainty in the type and amount of water treatment chemicals, which will increase additional economic and labor costs, and it is difficult to control system safety, Stable and efficient operation

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