Artificial inner gas stripping anaerobic reactor

Abstract

The invention discloses an artificial inner gas stripping anaerobic reactor which comprises a water inlet, a water return pipe, a reactor shell, a gas collecting separating cover, a gas stripping pipe, a gas-liquid separator, a gas stripping fan, a biogas outlet and a water outlet and is characterized in that the gas stripping fan is positioned in the gas-liquid separator. The gas stripping fan is positioned in the gas-liquid separator, so that internally-circulating water quantity can be artificially controlled while the reactor runs steadily, and gas stripping can be realized by using ordinary fans while energy consumption of the fans is lowered.

Description

technical field [0001] The invention relates to a sewage treatment reactor, in particular to a high-efficiency reactor for anaerobic treatment of sewage. Background technique [0002] Sewage anaerobic treatment reactor has experienced the development of CSTR, UASB, EGSB, internal circulation reactor and other stages, and the treatment efficiency of the reactor has been greatly improved. In terms of working principle, the internal circulation reactor has brought the advantages of the anaerobic reactor into full play. [0003] However, the internal circulation reactor also has its own weaknesses, which are mainly manifested in: the internal circulation reactor must rely on the gas stripping effect generated by its own biogas to achieve internal circulation, and due to the instability of sewage water quality and the unstable operation of the reactor Stability will make the biogas output of the reactor itself unstable, and the instability of the biogas output will make the inte...

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Problems solved by technology

Pump-type external circulation means that the sewage in a certain part of the reactor is pumped out with a pump, and then returned to an appropriate part of the reactor. Through the different arrangements of the pumping and returning water parts and the adjustment of the pumping volume, the internal circulation of the reactor can be realized. The stability of the internal circulation; however, one of the biggest disadvantages of this method is: the pumped part of the sewage, through the mechanical action of the pump, will break up the sludge and destroy the activity of the sludge, especially for particles The impact of sludge is even worse. If water without sludge (water in the upper part of the three-phase separator) is pumped, it is difficult to grade the water flow rate in the upper and lower parts of the three-phase separator, and it is difficult to achieve internal circulation.

Gas-type external circulation means that the biogas at the top of the reactor is pumped out by a fan and then pressed into the bottom of the reactor. By manually replenishing and adjusting the gas volume, the instability of the reactor's own gas production is compensated, and the internal circulation of the reactor is realized. However, this has brought many disadvantages: first, biogas is a flammable and explosive gas, which requires extremely high requirements on the fan for extracting biogas, and the equipment is expensive; second, the height of the internal circulation reactor is generally more than ten meters or more High, to overcome the pressure of water to press the gas back into the reactor, the energy consumption is very high

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