Oilfield wastewater filtering device

Abstract

The invention relates to an oilfield wastewater filtering device which comprises a shell, a washing bucket, a transmission shaft and a washing bucket cover, wherein the transmission shaft is connected with a motor through a belt pulley; the washing bucket is installed inside the shell through the transmission shaft; an upper support plate and a lower support plate are arranged in the middle of the washing bucket; stainless steel filtering nets are installed on the upper support plate and the lower support plate; and another stainless steel filtering net is installed on the washing bucket cover. The device is also provided with a walnut shell filtering material layer and a modified fiber ball filtering material layer, wherein the walnut shell filtering material layer is positioned at the upper part of the upper support plate; and the modified fiber ball filtering material layer is positioned at the upper part of the lower support plate. The filtering device is provided with two groups of blades which are installed on the transmission shaft and are respectively positioned at the upper part of the upper support plate and the upper part of the lower support plate. The oilfield wastewater filtering device with a washing function is adopted to wash by virtue of centrifugal force generated from rotational disturbance, thereby being beneficial to condensing small-grain oil drops and micro suspended matters into large grains to be discharged out at regular time; and due to different filtering materials at the upper and lower layers of the wastewater filtering device, the two-stage filtering function of rough filtration and fine filtration is realized.

Description

technical field [0001] The invention belongs to the technical field of oily sewage treatment equipment, and relates to an oilfield sewage filtering device. Background technique [0002] Oilfield oily sewage treatment is mainly divided into two-stage treatment processes of oil removal and filtration, and the treated sewage is reinjected. There is a large amount of sewage in the combined station of the oil field, which needs to be filtered to remove oil and suspended solids in the sewage, and reinjection is carried out after reaching the sewage reinjection index. Otherwise, the oil and suspended matter in the sewage will block the underground oil-water connection channel, resulting in blockage of the oil layer channel, and the energy of the oil layer after exploitation cannot be replenished in time, which will cause a decline in the underground oil recovery rate, and make it impossible to effectively recover a large amount of oil resources remaining in the underground oil laye...

AI Technical Summary

Problems solved by technology

The patent is a fixed filter device, and the filter efficiency needs to be improved

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