Ammonia nitrogen removing device assisting organic compound denitrifier in treating high concentration ammonia nitrogen wastewater

Abstract

The invention discloses an ammonia nitrogen removing device assisting an organic compound denitrifier in treating high concentration ammonia nitrogen wastewater in industrial wastewater treatment equipment. The device comprises a reaction tank and a denitrifying tower which are communicated with each other, wherein a first drug tank and a second drug tank which are respectively communicated with the reaction tank are arranged on the upper part of the reaction tank; a mixing and agitating device is arranged in the cavity of the reaction tank; multiple layers of ring-shaped water collecting tower plates are arranged in the cavity of the cylindrical denitrifying tower at intervals; the outer edges of the water collecting tower plates are fixed with the inner wall of the denitrifying tower; the inner rings of the water collecting tower plates form a cylindrical hollow gas channel in the middle cavity of the denitrifying tower; an aeration system and a compressed air supply line which are communicated with each other are fixedly arranged on each water collecting tower plate; an overflow plate and a baffle are arranged on each water collecting tower plate; a circular water-carrying channel communicating the water collecting tower plates from bottom to top is arranged between each overflow plate and each baffle; and each overflow plate is connected with a motor via a vertical shaft lever. The device has simple equipment, is simple and convenient to operate and has higher efficiency (over 99.99%) in denitrifying the high concentration ammonia nitrogen wastewater with the ammonia nitrogen concentration of 1000-50000mg/L.

Description

technical field [0001] The invention relates to a high-concentration ammonia nitrogen wastewater treatment device, which belongs to the technical field of industrial wastewater treatment equipment. Background technique [0002] The traditional stripping tower for ammonia nitrogen removal is to adjust the pH value of the wastewater to above 11, then pass air or steam into the packed tower, and strip the free ammonia in the wastewater into the atmosphere or steam through gas-liquid contact, so that the ammonia nitrogen can be removed from the The liquid phase is transferred to the gas phase, and the stripping tower has high requirements on pH, the amount of alkali added is large, and the power consumption is large. The ammonia nitrogen removal rate is greatly affected by the temperature. Only the combination of nitrogen and nitrogen processes can meet the standard discharge, so it can only be used as pretreatment for the treatment of high-concentration ammonia-nitrogen wastewa...

AI Technical Summary

Problems solved by technology

The same as the removal of ammonia nitrogen in the stripping tower, when the ammonia in the gas-liquid two-phase reaches equilibrium, the ammonia nitrogen in the water cannot continue to escape, so a single air lift cannot completely remove the ammonia nitrogen. Denitrification will greatly increase investment and operating costs

[0004] Therefore, the existing industrial water treatment devices for removing ammonia nitrogen consume a large amount of chemicals and energy, and are only suitable for low-concentration or small-scale ammonia nitrogen wastewater treatment, and the equipment is complicated and expensive

Under the current technical conditions, even with the most advanced anaerobic biological denitrification process and equipment, the upper limit of ammonia nitrogen treatment can only reach 1000mg / L, and the denitrification efficiency is only about 50%. For most nitrogen-containing industrial wastewater, The concentration of ammonia nitrogen in the wastewater is far more than 1000mg / L

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