High-salinity heating geothermal tail water treatment system

Abstract

The invention discloses a high-salinity heating geothermal tail water treatment system which comprises a membrane system A and a membrane system B, wherein the membrane system A comprises a first liftpump, a first filter structure and an external-pressure ultrafiltration membrane which are sequentially connected in series; a first pressure gauge is arranged on a pipeline between the first lift pump and the first filter structure; the membrane system B comprises a second lift pump, a second filter structure and a nanofiltration membrane which are sequentially connected in series; a water inletend of the second lift pump is communicated with a water outlet end of the external-pressure ultrafiltration membrane; a second pressure gauge is arranged on a pipeline between the second lift pump and the second filter structure. In a tail water treatment process, the high-salinity heating geothermal tail water treatment system disclosed by the invention can reduce the content of overproof indexes such as TDS, fluoride, chloride and boron, and realizes efficient reduction of pollutants in the tail water. The treatment system disclosed by the invention has the advantages of novel and reasonable design idea, simple device and reliability in use, and provides technical support to secondary utilization of high-salinity heating geothermal tail water.

Description

technical field [0001] The invention relates to the technical field of tail water treatment, in particular to a high salinity heating geothermal tail water treatment system. Background technique [0002] Geothermal energy is renewable thermal energy from deep within the earth, arising from the decay of the earth's molten magma and radioactive materials. The deep circulation of groundwater and the intrusion of magma from extreme depths into the earth's crust bring heat from the deep underground to the near surface. By digging geothermal wells, humans bring geothermal energy to the surface in the form of geothermal water or steam for utilization. [0003] Affected by factors such as tectonic activities and depositional environment, some areas form high-salinity heating geothermal tailwater (TDS content greater than 2000mg / L), and the contents of chloride, fluoride, boron and other indicators in the heating geothermal tailwater are high. Does not meet direct emission standard...

AI Technical Summary

Problems solved by technology

[0003] Affected by factors such as tectonic activities and depositional environment, some areas form high-salinity heating geothermal tailwater (TDS content greater than 2000mg / L), and the contents of chloride, fluoride, boron and other indicators in the heating geothermal tailwater are high. Does not meet direct emission standards

Such as direct discharge is likely to cause water pollution, crop growth damage and other environmental problems

Most water companies directly discharge the high-salinity heating geothermal tail water into the municipal pipe network without separate treatment, which not only greatly increases the cost of tail water treatment, but also wastes a lot of water resources

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