Three-phase separator of cylindrical internal-recycling anaerobic reactor

Abstract

The invention discloses a three-phase separator of a cylindrical internal-recycling anaerobic reactor, which comprises a central tube (1), an external sloping plate (3), an internal sloping plate (4) and confluence channels (6), wherein the external sloping plate (3) and the internal sloping plate (4) compose a group of gas-liquid separation units of which the longitudinal section is in an inverted V shape; central confluence areas (2) which are buckled in the vertical direction to form a pipe socket shape are arranged below the central tube (1); the confluence channels (6) are uniformly arranged from the central confluence areas (2) radially; all gas-liquid separation units are distributed among the confluence channels (6) in the circumferential directions of circles which take points on the axial line of the central tube (1) as circle centers and of which the diameters are gradually increased from top to bottom, and form overflow slots (7); and the outside of the internal sloping plate (4) adjacent to a cylindrical wall (14) is connected with a skirt plate (5), and forms an annular return sludge flow slot (13). The three-phase separator presents a pipe socket structure which is symmetric with respect to the central axis and has a downward wide opening on the whole, thereby enhancing the distribution uniformity of liquid flow on the cross section of the reactor, improving the internal recycling formation conditions and being beneficial to increase of anaerobic reaction efficiency.

Description

technical field [0001] The invention relates to a waste water anaerobic biological treatment equipment, in particular, the invention relates to a three-phase separator of a cylindrical internal circulation anaerobic reactor. Background technique [0002] The three-phase separator is the key equipment in the internal circulation anaerobic reactor. Its function is to (1) collect the biogas generated in the reaction zone and introduce the biogas into the riser, and drive the liquid as the biogas rises in the riser. The flow flows upward to form the internal circulation of the reactor; (2) The granular sludge is trapped in the reaction zone at the lower part of the three-phase separator as much as possible to reduce the breakdown of the granular sludge that may occur with the internal circulation flow; (3) The liquid flow When entering the upper reaction zone from the lower reaction zone through the three-phase separator, the uniform distribution of the liquid flow on the cross ...

AI Technical Summary

Problems solved by technology

[0004] 1) The installation form of the existing three-phase separator is mostly suitable for the anaerobic reactor with a rectangular cross section, and the structure is complicated when used for the cylindrical anaerobic reactor;

[0005] 2) In the confluence channel arranged horizontally, the collected biogas will gather at the top of the confluence channel and be stratified with the liquid phase. In the process of flowing to the riser in the middle, it is difficult to drive the liquid phase in the lower part of the confluence channel gas space to flow together. The liquid phase driven by the internal circulation flow formed after the biogas enters the riser mainly comes from the lower area of ​​the riser, which causes the unbalanced flow of the liquid flow on the cross-section of the reactor, which in turn affects the efficiency of the anaerobic reaction;

[0006] 3) There is no diversion measure at the bottom inlet of the riser, gas and liquid enter through the nozzle together, and the gas that enters may rise in the form of large bubbles, which is not conducive to the formation of internal circulation

[0008] 1) Since there is no gas-liquid interface, granular sludge cannot be trapped in the reaction zone, which is not conducive to the formation of large particle anaerobic sludge;

[0009] 2) When the liquid flow passes through the three-phase separator, it is difficult to form a uniform distribution on the cross section

[0010] To sum up, the structure of the existing three-phase separator makes it difficult for its liquid flow to be evenly distributed on the cross-section of the reactor and is not conducive to the retention of granular sludge.

In addition, the existing three-phase separator does not have diversion measures on the riser where the gas and liquid enter, so that when the gas and liquid enter together, the gas may rise in the form of large bubbles and affect the formation of the internal circulation. affect the efficiency of the anaerobic reaction

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