Ammonium sulfite oxidation enhanced micro-interface reaction system and method

Abstract

The invention relates to an ammonium sulfite oxidation enhanced micro-interface reaction system which comprises an ammonium sulfite storage tank, an oxygen inlet pipeline, external micro-interface generators and a first oxidation reactor; a hydraulic micro-interface generator and a first oxygen micro-interface generator are arranged in the first oxidation reactor; a micro-interface unit is arranged on the side surface of the first oxidation reactor, consists of a plurality of external micro-interface generators, and is connected with the ammonium sulfite storage tank and the oxygen inlet pipeline; the first oxidation reactor and a second oxidation reactor are connected in parallel, the second oxidation reactor is internally provided with a second oxygen micro-interface generator and a liquid ejector, the oxygen inlet pipeline is connected with the second oxygen micro-interface generator, and the ammonium sulfite storage tank is connected with the liquid ejector. 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 sulfurous acid oxidation, in particular to an enhanced 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 sul...

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Problems solved by technology

[0005] The first object of the present invention is to provide an enhanced micro-interface reaction system for ammonium sulfite oxidation. This reaction system is equipped with a first oxygen micro-interface generator inside the first oxidation reactor, so that the oxygen is pre-broken and dispersed before the reaction. Oxygen microbubbles are formed, which increases the mass transfer area of ​​the phase boundary between oxygen and ammonium sulfite solution, thereby solving the problem that the phase boundary mass transfer area of ​​oxygen and ammonium sulfite solution in the prior art is small, the reaction rate is slow, and the formation of For the problem of low ammonium sulfate efficiency, this reaction system is also equipped with a liquid micro-interface generator inside the first oxidation reactor, which entrains the oxygen accumulated at the top of the first oxidation reactor through the liquid phase as the power to ensure sufficient gas Use to improve reaction efficiency; the reaction system is equipped with a micro-interface unit outside the first oxidation reactor, which breaks and disperses oxygen into micro-bubbles in advance and mixes them with ammonium sulfite solution to increase the gas holdup rate and reaction efficiency. ; The reaction system is provided with a liquid injector at the top of the second oxidation reactor, and the oxygen gathered at the top of the second oxidation reactor is scattered and returned to the middle of the second oxidation reactor, which ensures the full utilization of the gas and improves the Reaction efficiency; the reaction system is provided with a second oxygen micro-interface generator in the middle and bottom of the second oxidation reactor to pre-break and disperse the sheep's hooves into oxygen microbubbles, increasing the phase boundary between oxygen and ammonium sulfite solution The mass transfer area increases the gas holdup and improves the reaction efficiency

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