Bi-circulating multistage anaerobic reaction device

Abstract

The invention discloses a bi-circulating multistage anaerobic reaction device which comprises two anaerobic reactors. The anaerobic reactors comprise containers (15), and water distributors (2), a water feed tube (1), first-stage three-phase separators (3), second-stage three-phase separators (6), a water discharge tube (11) and rotational gas liquid separators (10) are arranged in the containers (15) successively from bottom to top. Methane outlet tubes (8) leading to the outside is arranged at the tops of the rotational gas liquid separators (10), fluidized bed reaction chambers (14) are arranged between the water distributors (2) and the first-stage three-phase separators (3), and deep purification reaction chambers (14) are arranged between the first-stage three-phase separators (3) and the second-stage three-phase separators (6). The bi-circulating multistage anaerobic reaction device has both internal circulation and external circulation, has the advantages of being power saving, small in sludge amount and high in treatment volume loading rate, saving occupied areas, being high in impact load resistance and the like, and is applicable to high-concentration and low-concentration organic industrial wastewater.

Description

technical field [0001] The invention belongs to sewage treatment equipment, in particular to a double-cycle multi-stage anaerobic reaction device. Background technique [0002] High-concentration organic wastewater is a major industrial pollution source that is difficult to treat, with high COD concentration. Conventional high-concentration organic wastewater treatment equipment includes UASB anaerobic reactors, anaerobic biological filters, etc., all of which have problems such as large investment, high operating costs, and poor treatment effects. This technical bottleneck restricts the popularization and application of traditional wastewater treatment technologies . [0003] The following are the public documents we found about the anaerobic reaction device: [0004] 1. Application number: 02282323.9, utility model name: internal circulation anaerobic expanded bed / fluidized bed reactor, the main technical feature of this reactor is that the gas-liquid separation zone and...

AI Technical Summary

Problems solved by technology

The patented reactor can still form an internal circulation, but the structure is greatly simplified, the clogging problem is effectively alleviated, and the introduction of the carrier solves the problem of low ascending flow rate

However, the disadvantages of this patent are: the carrier current consumes a lot of energy, and the design requirements of the system are high

[0005]2. Application number: 200610122737.6, invention name: two-phase integrated multi-level internal circulation anaerobic bioreactor, the reactor is equipped with multi-layer internal circulation technology device , so that the fluid is in a good fluidized state. Compared with the traditional anaerobic reactor, its treatment effect has the following advantages: small footprint; high load rate, strong impact load resistance, high treatment efficiency, stable operation treatment effect, etc.; but The disadvantages of this patent are: the lack of external circulation, the pH value needs to be adjusted for wastewater with high difficulty and low pH value, and the operating cost is high

However, the disadvantage of this patent is that it lacks external circulation, and the pH value needs to be adjusted for wastewater with high difficulty and low pH value, and the operating cost is high.

However, the disadvantages of this patent are: the start-up speed of the device is slow, the treatment efficiency is not high, and the external circulation is lacking. For the wastewater with high difficulty and low pH value, the pH value needs to be adjusted, and the operating cost is high.

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