Staged reaction system of IC anaerobic reactor

Abstract

The invention discloses a staged reaction system of an IC anaerobic reactor. The system comprises a tank body and a gas-liquid separator, a gas collecting device is arranged at the upper part in the tank body, the gas collecting device is connected with the gas-liquid separator, the interior of the tank body is divided into an upper reaction area and a lower reaction area by a partition plate, thegas collecting device is positioned above the upper reaction area, a lower acidifying liquid ascending pipe penetrates through the partition plate, the upper end of the lower acidifying liquid ascending pipe is blocked, an upper water distributor is arranged on the periphery of the lower acidifying liquid ascending pipe in the upper reaction area, a lower water distributor connected with a waterinlet device is arranged at the bottom of the tank body in the lower reaction area, the lower acidifying liquid ascending pipe is connected with the upper water distributor through an upper water distribution pipe, a return pipe penetrates through the gas collecting device, the upper end of the return pipe is connected with a gas-liquid separator, and the return pipe is respectively communicated with the upper water distributor and the lower water distributor. Acid-producing anaerobic microorganisms and methane-producing anaerobic microorganisms in the IC anaerobic reactor are subjected to classified culture, and the reactor is high in volume load, small in equipment size and low in operation cost.

Description

technical field [0001] The invention relates to a wastewater treatment technology, in particular to a staged reaction system of an IC anaerobic reactor. Background technique [0002] IC anaerobic reactor is a high-efficiency multi-stage internal circulation reactor, which is a representative type of the third-generation anaerobic reactor. Due to the strong internal circulation, the reactor has good mass transfer effect, large biomass, and its volume The load is much higher than that of ordinary UASB anaerobic reactors, generally about 3 times higher. It is an ideal anaerobic wastewater treatment equipment in wastewater treatment at present. It has been used in beer, liquor, alcohol, wine, citric acid, papermaking, starch, etc. It has been widely used in wastewater treatment in industries such as chemical industry, garbage permeate and so on. [0003] IC anaerobic reactor is currently an ideal anaerobic treatment equipment in wastewater treatment. Anaerobic biological treatm...

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Problems solved by technology

The entire anaerobic digestion process is divided into three stages, namely: 1. Hydrolysis and fermentation stage, 2. Hydrogen production and acetic acid production stage, 3. Methane production stage. When the current IC anaerobic reactor is used, the acid production and anaerobic Microorganisms and methanogenic anaerobic microorganisms are cultivated and reproduced in the same reaction area, which leads to mutual interference of microorganisms in wastewater, uneven contact between microorganisms and organic matter, affecting their growth and reproduction, which affects the treatment of wastewater. Current IC anaerobic reactors The above phenomenon has not been resolved

And because the water distribution is the core technology of the IC anaerobic reactor, the uniformity of the water distribution is directly related to the treatment effect of the IC anaerobic reactor, especially the water distribution of the IC anaerobic reactor with a larger tank diameter is difficult. To ensure uniform water distribution, it is easy to produce dead zone of water distribution. As time goes by, sludge will accumulate, calcify and harden sludge, affect the full contact between organic matter and microorganisms, and ultimately affect the treatment effect. The current IC is disgusting The water distribution of the oxygen reactor mostly adopts a large-diameter IC reactor and multiple gas-liquid separators, such as 4 gas-liquid separators, and each gas-liquid separator is equipped with a reflux system of a return pipe, and the reflux water is circulated internally. Return to the bottom of the reactor through each return pipe, increase the hydraulic load together with the raw waste water, make the organic matter fully contact with the microorganisms, and improve the degradation effect of the microorganisms on the organic matter, but this makes the structure of the IC anaerobic reactor too complicated and the volume Huge, large investment in equipment, not convenient for production, transportation, installation and maintenance, not conducive to factory and industrial production, so with the continuous development of production, a series of technologies for IC anaerobic reactors still need to be studied and improved

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