Novel process for treating fermentation waste gas of amino acid by utilizing plasma reactor

Abstract

The invention discloses a novel process for treating fermentation waste gas of amino acid by utilizing a plasma reactor, which comprises the following steps that: waste gas of a zymotic fluid is dedusted and deodorized through a Venturi spray tower and an electrostatic precipitator, fume containing extremely high COD and a condensate are removed through a gas-liquid separator; and then the obtained product enters a second-stage series plasma reactor, an electrical control element in the plasma reactor discharges in a purification area through microwave transmission when the waste gas is introduced into the purification area of the plasma reactor, so that the gas is ionized to produce a large amount of plasmas in the purification area to deodorize and remove the odor of the waste gas of the zymotic fluid, and the waste gas treated by the plasma reactor is exhausted from an outlet. Laboratory, small, pilot scale and industrialized tests show that the treatment process can greatly reduce the content of pollutants in the fume, and ensure that the emission reaches the state-specified standard.

Description

technical field [0001] The invention belongs to the technical field of amino acid fermentation waste gas treatment, and relates to a new process for treating amino acid fermentation waste gas by using a plasma reactor. Background technique [0002] In the amino acid fermentation industry, the pollution of waste liquid and gas is quite serious. At present, the relatively advanced technology in China is to produce high-concentration fermentation waste liquid in the process of amino acid production. Evaporation and concentration are carried out in the state, and the concentrated solution is dried and granulated by a spray granulation dryer. During the spray drying process, a large amount of water evaporates under the action of high-temperature hot air to form odorous water vapor. In response to this situation, dust removal and deodorization equipment is installed in the process, so that the waste gas generated during the spray drying process enters the Venturi spray tower and ...

AI Technical Summary

Problems solved by technology

The current problem is that this set of equipment uses fermented waste water for spray cooling in the Venturi spray process, the spray volume is large, the water temperature is high, and a large amount of water vapor is formed in the second time; The solid particles in the flue gas, but the solid particles in the outlet exhaust gas are still relatively high (428.0mg / m 3 ), the relative humidity of the exhaust gas is already 100%; by measuring the purge and trap-gas chromatography mass spectrometry (P&T-GC / MS) analysis method of the spray granulation tail gas, the main substances of the tail gas are as shown in Table 1 , the tail gas is identified as aerosol, the main compounds are: 9-octadecenoic acid; The exhausted solid particles and the burnt-flavored organic matter in the concentrated liquid are discharged through the chimney together. If not treated, the air pollution will be quite serious.

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