System and method for treating N-(phosphonomethyl)iminodiacetic acid high-salinity wastewater

Abstract

The invention provides a system and a method for treating N-(phosphonomethyl)iminodiacetic acid high-salinity wastewater. The treatment system comprises a booster pump, a water inlet-outlet heat exchanger, a water inlet heater and an oxidation reactor which are connected in sequence, and a wastewater inlet, a wastewater outlet, an oxidized water inlet and an oxidized water outlet are formed in thewater inlet-outlet heat exchanger; oxidized water from the oxidation reactor enters the water inlet-outlet heat exchanger from the oxidized water inlet, the oxidized water outlet is connected with anintermediate tank, the wastewater inlet is connected with the booster pump, and the wastewater outlet is connected with a wastewater heater; and a micro-interface unit is arranged at the lower part in the oxidation reactor and is used for dispersing crushed gas into bubbles, and a gas inlet is formed in the side wall of the oxidation reactor and is connected with the micro-interface unit througha pipeline. According to the treatment system, the micro-interface unit is arranged in the oxidation reactor, so that the temperature and the pressure of the wastewater treatment system are fully reduced, and the effects of low energy consumption and low operation cost are achieved.

Description

technical field [0001] The invention relates to the field of treatment of diglyphosate high-salt wastewater, in particular to a treatment system and method for diglyphosate high-salt wastewater. Background technique [0002] Wet Air Oxidation (WAO for short) is to use air or oxygen as an oxidant under high temperature and high pressure operating conditions to oxidize organic matter and reduced inorganic matter in wastewater into easily biochemical small molecules or minerals. Harmless inorganic substances and inorganic salts. The wet oxidation process does not produce harmful substances such as HCl, dioxins, and fly ash, and has low operating energy consumption. The heat generated by the oxidation of organic matter in the wastewater can be used to heat the feed wastewater, and even by-product steam. It is a very effective method for treating high-concentration organic wastewater. [0003] In the prior art, the basic process of wet oxidation is as follows: after the wastewa...

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Problems solved by technology

Excessive air increases the energy consumption of the air compressor and increases the operating cost of the device

In addition, excessive air will reduce the volume utilization efficiency of the reactor, further increase the size and rising speed of air bubbles, increase the water vapor and VOCs entrained in the tail gas, etc., which are not conducive to the energy saving and consumption reduction of the reaction process.

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