Device and method for reducing ammonia nitrogen in PVDC resin production wastewater

Abstract

The invention discloses a device and a method for reducing ammonia nitrogen in PVDC resin production wastewater. The device comprises a raw wastewater storage tank, an aeration tower, a fan, a wastewater temporary storage tank, an ammonia nitrogen detection system and an ammonia nitrogen remover storage tank, wherein the raw wastewater storage tank is communicated with a water inlet at the upper part of the aeration tower through a water inlet pipe; the fan is communicated with an air inlet at the lower part of the aeration tower, the wastewater temporary storage tank is communicated with a water outlet at the bottom of the aeration tower through a water outlet pipe, the ammonia nitrogen remover storage tank is communicated with a liquid inlet at the lower part of the aeration tower, and the ammonia nitrogen detection system is respectively communicated with the water inlet pipe and the water outlet pipe. The method has the advantages that the ammonia nitrogen content in the wastewater finally discharged by the factory can be effectively controlled within the discharge standard, and the method is more environment-friendly.

Description

Technical field [0001] The present invention relates to the field of wastewater treatment techniques, and more particularly to a ammonia nitrogen reduction device and method thereof for PVDC resin production wastewater. Background technique [0002] The company produces food-grade polyvinyl chloride (referred to as PVDC resin) wastewater has two aspects of product production and sewage. The wastewater produced by the product produced from the chloride monomer manufacturing process, the PVDC resin polymerization step and the PVDC resin drying process. The ammonitrid in the factory emissions wastewater is an important indicator in wastewater emissions. At present, the national standard requirement is 25mg / L or less. The ammonia nitrogen in the factory discharge wastewater is mainly derived from the chloride monomer manufacturing process and domestic sewage, in which the ammonia nitrogen content in the wastewater of the chloride monomer manufacturing process accounts for 90% of th...

AI Technical Summary

Problems solved by technology

However, when an abnormality occurs in the production process of vinylidene chloride monomer, the ammonia nitrogen content in the wastewater discharged from the factory will exceed the discharge standard by 25 mg / L, resulting in an emergency stop of wastewater discharge, and in severe cases, the production load will be reduced, and even the vinylidene chloride monomer process will be shut down.

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