Efficient half-quantity nitrosation reactor and method thereof

Abstract

The invention discloses an efficient half-quantity nitrosation reactor and a method thereof. A reactor main body consists of an inner cylinder and an outer cylinder which are concentric, a hollow cylinder formed after the big cylinder sleeves the small cylinder serves as a reaction system, the reaction system is internally provided with four nitrosation units, the small cylinder serves as a water collecting system, and is internally provided with a water collecting well. Each nitrosation unit is provided with a water distributing system, a reaction area and a separation system. The four nitrosation units perform adopt sequencing batch operation, run in turn, and are communicated with the inner cylinder through siphons respectively, and the water collecting well is shared. Nitrosation system sub-units are integrated into one body, so that independent control and combined control are facilitated; the reactor is large in diameter-to-height ratio and small in occupied area; the nitrosation units perform airlift type internal recycle, and the volume efficiency is high; and sequencing batch operation is adopted, the separation of mud and water is simple, and the schedule control for nitrosation is easy.

Description

technical field [0001] The invention relates to a nitration reactor, in particular to a high-efficiency half-volume nitrosation reactor and a method thereof. Background technique [0002] With the acceleration of urbanization in my country and the increase of urban population, the excess sludge produced by municipal sewage treatment plants has become a new problem in the field of sewage treatment that needs to be solved urgently. According to the "2014 China Environmental Statistical Annual Report", the annual wastewater treatment capacity of 6,031 urban sewage treatment plants across the country is 4.943 million tons, the amount of sludge generated is 28.015 million tons, and the amount of sludge disposed of is 27.997 million tons. [0003] In order to facilitate subsequent treatment, greatly reduce the storage space of excess sludge, and reduce the transportation cost of sludge, anaerobic digestion and dehydration are often performed on excess sludge. Filtrate is produced...

AI Technical Summary

Problems solved by technology

At present, the nitrosation (short-range nitrification) reported in the literature is all realized through the regulation of physical and chemical factors (such as temperature, DO, pH, alkalinity). Required NO 2 - -N / NH 4 + -N ratio

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