Waste water disposal technique by union of steam recompression evaporation and flue spraying technology

Abstract

The invention discloses a waste water disposal technique by union of steam recompression evaporation and flue spraying technology. The technique includes steps of removing suspended solid and calciumfrom waste water; then delivering waste water to a raw water tank by a water delivering pump after filtering, delivering waste water to a preheater by a raw water pump and a raw water filter to heat;after preliminarily preheating the waste water, heating in a pipe box at the lower part of the heater without evaporation, and then entering a gas fluid separator to carry out flashing and generate enough steam, absorbing steam to a steam compressor; using the secondary steam compressed and heated by the steam compressor as a new heat source and delivering to a shell side of the heater to releasethe potential heat; closing a steam door and realizing the self-circulation evaporation and heat transfer; drawing waste water without being evaporated in the gas fluid separator at a conical side ofthe lower part; delivering the circulated pump to the heater to circularly absorb heat; after circular evaporation for many times, discharging concentrated waste water from one path of the bottom partof the gas fluid separator to a concentrated water box and then delivering to a flue to spray and evaporate; discharging the other path to the raw water tank to adjust water balance. The waste waterdisposal technique is applicable to the treatment of waste water of a heat-engine plant.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a process for treating waste water with steam recompression evaporation concentration combined with flue spray technology, which is used for zero discharge treatment of waste water in thermal power plants. Background technique [0002] MVR is the abbreviation of mechanical vapor recompression technology (mechanical vapor recompression), which uses the secondary steam and its energy generated by the evaporation system itself to upgrade the low-grade steam into a high-grade steam heat source through the mechanical work of the compressor. Such a cycle provides heat energy to the evaporation system, thereby reducing the demand for external energy as an energy-saving technology. MVR technology has entered the Chinese market from North America and Europe since 2007, and is mainly used in food deep processing, dairy industry, industrial wastewater treatment and...

AI Technical Summary

Problems solved by technology

Some traditional processes have complicated design, high equipment failure rate, unsatisfactory operation effect, poor dehydration effect, inconvenient sludge treatment and disposal, and high-salt wastewater discharge, etc.

If these problems are not well resolved, it will seriously affect the industrial application of various desulfurization wastewater treatment processes

[0006] At present, there is no desulfurization that has a reasonable structure design, low operating cost, high operational stability, and can effectively remove high salinity (salt content 15,000mg / L-110,000mg / L), heavy metal ions, and suspended solids in wastewater. Wastewater Treatment Plant

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