High salinity organic wastewater treatment equipment

Abstract

The invention discloses high salinity organic wastewater treatment equipment. The equipment consists of a raw water tank, a feeding pump, an MVR evaporator, a discharge pump, a magma tank, a centrifuge A, a refrigeration tank, a filter, a nanofiltration membrane separation instrument, a fluidized bed boiler, a vacuum evaporator and a centrifuge B. The raw water tank is connected to the MVR evaporator, the water outlet of the MVR evaporator is connected to the magma tank, the discharge port of the magma tank is connected to the centrifuge A, the liquid discharge port of the centrifuge A is connected to the refrigeration tank, the refrigeration tank is connected to the nanofiltration membrane separation instrument through the filter, the organic wastewater outlet of the nanofiltration membrane separation instrument is connected to the fluidized bed boiler, the vacuum evaporator is internally equipped with a heating pipeline, the vacuum evaporator is provided with a water inlet, a discharge port and a secondary steam outlet, and the steam outlet of the fluidized bed boiler is connected to the heating pipeline. The high salinity organic wastewater treatment equipment provided by the invention employs the novel MVR evaporator to replace the traditional multi-effect evaporator, combines the evaporation process with refrigeration process, combines vacuum evaporation for salt making with high temperature incineration of organic matters, simplifies the process, and reduces the energy consumption.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment equipment, in particular to high-salt organic wastewater treatment equipment. Background technique [0002] In modern organic chemical industry, the output of salt-containing organic wastewater is huge, and salt-nitrate-type high-COD organic wastewater is one of the most common types. This kind of wastewater brings great pressure to environmental protection. At the same time, for wastewater with high salinity, it may also cause waste of resources because the salt in it cannot be recovered. High COD organic wastewater containing sodium sulfate and sodium chloride has the characteristics of high salinity and high concentration of organic waste. Compared with inorganic wastewater and pure organic wastewater, its treatment is more difficult. [0003] The traditional salt-nitrate co-production process uses multi-effect evaporation, high-temperature tanks produce mirabilite, and low-temper...

AI Technical Summary

Problems solved by technology

This traditional process has a relatively complicated process and requires more control points. At the same time, due to the use of multi-effect evaporation, the energy consumption is high, and it cannot be used for the treatment of high-COD salt-nitrate wastewater.

When conventional multi-effect evaporation crystallization is used, as the organic matter enriches, the slurry gradually thickens, and the heat transfer and separation in the final effect (even the last two effects) evaporator will become very difficult, the energy consumption will be high, and the salt and Poor separation of organic matter

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