Micro-interface reaction system and method for ammonium sulfite oxidation

Abstract

A micro-interface reaction system for ammonium sulfite oxidation comprises an oxidation reactor, an ammonium sulfite storage tank, an oxygen inlet pipeline and external micro-interface generators; a hydraulic micro-interface generator and an oxygen micro-interface generator are arranged in the oxidation reactor, and the oxygen inlet pipeline is connected with the oxygen micro-interface generator and the hydraulic micro-interface generator; a micro-interface unit is arranged on the side surface of the oxidation reactor, is composed of a plurality of external micro-interface generators, and is connected with the ammonium sulfite storage tank and the oxygen inlet pipeline, so that oxygen and an ammonium sulfite solution enter the micro-interface unit to be crushed and dispersed; and the crushed and dispersed oxygen microbubbles enter the oxidation reactor along with the ammonium sulfite solution. The reaction system provided by the invention ensures full utilization of gas, and improves the gas content and the reaction efficiency.

Description

technical field [0001] The invention relates to the field of ammonium sulfite oxidation, in particular to a micro-interface reaction system and method for ammonium sulfite oxidation. Background technique [0002] The ammonia desulfurization process is a green process, using ammonia as an absorbent to remove SO2 in the flue gas and generate ammonium sulfite, which can also be applied directly as a fertilizer, but the product has poor stability and is difficult to be accepted by farmers; As a raw material for small paper mills, waste water will be generated, causing secondary pollution. The performance of ammonium sulfate product is stable, which contains nitrogen and sulfur, which is beneficial to plant growth. It can be used not only as a separate fertilizer, but also as a raw material for producing compound fertilizers. Therefore, the oxidation of ammonium sulfite has become more and more popular. attention. How to efficiently and economically convert ammonium sulfite int...

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Problems solved by technology

[0005] The first object of the present invention is to provide a kind of micro-interface reaction system of ammonium sulfite oxidation, this reaction system is by being provided with oxygen micro-interface generator inside oxidation reactor, makes oxygen pre-broken and dispersed into oxygen microbubbles before reaction, Increased the phase boundary mass transfer area between oxygen and ammonium sulfite solution, thereby solving the problems of the prior art that the phase boundary mass transfer area between oxygen and ammonium sulfite solution is small, the reaction rate is slow, and the efficiency of generating ammonium sulfate is low The problem is that the reaction system is also equipped with a hydraulic micro-interface generator inside the oxidation reactor, which entrains the oxygen accumulated at the top of the oxidation reactor through the liquid phase to ensure the full use of the gas and improve the reaction efficiency; the reaction system A micro-interface unit is installed outside the oxidation reactor to pre-break and disperse oxygen into micro-bubbles and mix them with ammonium sulfite solution to improve reaction efficiency

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