Converter station external drainage treatment system

Abstract

The invention discloses a converter station external drainage treatment system which comprises an electric drive thickening unit, a steam recompression unit, a control unit, a product water tank and a mother liquor tank, after external drainage is treated by the electric drive thickening unit, fresh water is directly discharged into the product water tank, and concentrated water is preheated and heated and then enters a separator to be evaporated and separated; the steam is heated and boosted by the compressor and then condensed into product water by the heater, the heat of the product water is recovered by the preheater, finally, the product water is discharged into the product water tank for recycling, and mother liquor in the separator is discharged regularly. In the water treatment process, chemicals do not need to be added, the energy consumption is low, the cleaning step is simple, the acid consumption is low, the flux of the cleaned electrode is not attenuated, the treated water can be recycled, the recovery rate is high, and the water yield is not influenced by temperature; the system is high in anti-pollution capacity, long in service life and low in inlet water quality requirement, and can be used for high-hardness and high-sulfate water. The cleaning period is long, the maintenance difficulty and cost are low, the functions are comprehensive, no sludge is generated, and the integration level is high.

Description

technical field [0001] The invention relates to a water treatment system, in particular to a drainage treatment system outside a converter station. Background technique [0002] The external drainage of the converter station includes the drainage of the converter valve and the cooling system of the condenser, the concentrated water of reverse osmosis, the backwash water of the filter, and the regenerated water of ion exchange. The total external drainage of the whole plant is 8 to 40 tons / hour. This part of the external drainage is high in salt, especially in chloride ions and hardness ions. However, most of the current HVDC converter stations are located in remote ecologically sensitive areas, with no drainage pipe network nearby, and no suitable receiving water bodies. They lack targeted wastewater treatment or discharge control measures, and it is easy to discharge a large amount of high-salt wastewater. Causing salinization of soil and water, causing damage to the ecolo...

AI Technical Summary

Problems solved by technology

However, the reverse osmosis system will be blocked, causing the reverse osmosis system unit to fail to replenish water to the balance pool; and the replacement cycle is frequent, and the operating cost is high; the dosing system makes the external drainage components complicated, and the drainage indicators are difficult to meet environmental protection requirements; high doses of medicine and The generated sludge needs to be disposed of, which is difficult and costly to maintain

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