MVR (Mechanical Vapor Recompression) vapor-stripping deamination system and application method thereof

Abstract

The invention relates to an MVR vapor-stripping deamination system. The MVR (Mechanical Vapor Recompression) vapor-stripping deamination system comprises a vapor-stripping deamination tower, an ammonia water rectification tower and a condenser, wherein a high-ammonia-nitrogen sewage input pipe, a vapor input pipe I, a post-deamination waste water discharge port and an ammonia-containing vapor discharge port I are arranged on the vapor-stripping deamination tower; the vapor-stripping deamination tower is connected with a reboiler; the high-ammonia-nitrogen sewage input pipe is connected with waste water feed preheaters (II and I); the post-deamination waste water discharge port is connected with the waste water feed preheater I and an axial flow pump respectively; the ammonia-containing vapor discharge port I is connected with the reboiler through a mechanical vapor compressor; the reboiler is connected with a dilute ammonia water storage tank connected with the ammonia water rectification tower; a discharge port, an ammonia-containing vapor discharge port II and a vapor input pipe are arranged on the ammonia water rectification tower; the discharge port is connected with a rectification tower kettle discharge pump and the waste water feed preheater II; the ammonia-containing vapor discharge port II is connected with the condenser; a strong ammonia water discharge port is connected with a strong ammonia water storage tank connected with the ammonia water rectification tower. Meanwhile, the invention further discloses an application method of the MVR vapor-stripping deamination system. The MVR vapor-stripping deamination system has the advantages of less investment, high feasibility and high comprehensive utilization ration.

Description

technical field [0001] The invention relates to the technical field of ammonia-containing wastewater deamination treatment, in particular to an MVR stripping deamination system and a method thereof. Background technique [0002] Petrochemical, metallurgy, food and other industries often produce a large amount of ammonia nitrogen wastewater. Due to the relatively high cost of treating ammonia nitrogen wastewater, the consumption of steam is usually above 180kg / t of wastewater, the device is not energy-saving, and the operating cost is high, which is unbearable for enterprises. [0003] Ammonia-containing wastewater removal technologies usually include biochemical methods, stripping methods, steam stripping methods, breakpoint chlorination methods, ion exchange methods, chemical precipitation methods, membrane separation methods, etc. At present, in the treatment of high-concentration ammonia nitrogen wastewater with an ammonia nitrogen content of 500-10000ppm in the treatmen...

AI Technical Summary

Problems solved by technology

However, for high ammonia nitrogen wastewater, because the quality of the wastewater is usually relatively complex, the evaporation and crystallization using only MVR technology not only has a large amount of evaporation, but also the obtained product is impure and cannot be reused industrially.

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