Novel double-layer filter material filtration tank applied to oil field sewage treatment

Abstract

Disclosed is a novel double-layer filter material filtration tank applied to oil field sewage treatment. The tank comprises a tank body, a water distribution device, a stirring device, a mechanical sealing device, filter materials and a water collecting device; the water distribution device comprises a filtering water inlet pipe, a water inlet cavity, a water distribution cavity, a water distribution substrate and a water distribution sieve plate; the stirring device comprises a motor, a rotating shaft, a propeller, a shaft sleeve and saw blades; after sewage enters the filtration tank throughthe filtering water inlet pipe, the flow direction of the sewage is distributed by the water distribution device, the sewage is filtered by the multi-layer filter materials, and filtered water is collected by the water collecting device. In the backwashing process, the hardened filter materials can be destroyed by the propeller and the saw blades, and convection flushing of the water and the filter materials is accelerated. The filtration tank mainly solves the problems of incomplete backwashing, instability of the rotating shafts and loss of the filter materials, achieves full automation inthe process, effectively saves manpower, reduces the use cost and improves the work efficiency.

Description

Technical field: [0001] The invention relates to the technical field of filtering oil field wellheads or other petrochemical waste liquids, and is a novel double-layer filter material filter tank applied to oil field sewage treatment. Background technique: [0002] At present, the filtration technology in the market adopts semi-automatic devices, which are mainly aimed at the treatment of oil, polymers and suspended solids in oilfield produced water. Through the filter layer composed of different graded filter materials, the polymers, suspended solids and dirty oil in the sewage are intercepted step by step by the filter layer, and the filtered water is discharged from the water outlet through the water collection system. In the filtration cycle, the removed suspended solids and oil stay on the filter bed, which increases the filtration resistance and causes the flow rate and water quality of the filtered water to decline. During the backwashing process, because the rotatin...

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Problems solved by technology

During the backwashing process, because the rotating shaft of the stirring device is too long, it will vibrate during rotation, causing the mechanical seal device to be easily damaged and causing property loss. During the backwashing process, the filter material and filter bed are backwashed with clean water to achieve clean For the purpose of regeneration of filter bed and filter material, in the filtration and backwashing cycle of existing equipment, the sieve holes are too fine and easy to be blocked, and the removed suspended solids and oil cannot be completely discharged, which seriously affects the use of equipment and shortens the backwashing cycle

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