Modularized rotational-flow air-flotation filtering device

Abstract

The invention discloses a modularized rotational-flow air-flotation filtering device which is suitable for the field of industrial sewage purification treatment and special situation emergency treatment. The modularized rotational-flow air-flotation filtering device comprises a drum. A dross collecting trough and a filtering material layer are sequentially arranged in the drum in a spaced mode from top to bottom. A swirler is arranged in the center of the drum and is a cylindrical tube. A tube opening in the upper end of the tube directly faces the portion below the dross collecting trough, and a tube opening in the lower end of the tube extends out of a lower end socket of the drum to serve as a sewage outlet. The dross collecting trough is composed of a conical cylinder with the inverse-V-shaped cross section and a vertically-upward dross tube arranged in the center of the conical cylinder. The tail end of the cylinder wall of the conical cylinder of the dross collecting trough is connected with the side wall of the cylinder in a sealed mode. A dross collecting area is formed by the upper surface of the cylinder wall of the conical cylinder of the dross collecting trough and the cylinder wall of the cylinder. A dross outlet is formed in the portion, in the dross collecting area, of the side wall of the cylinder. A water inlet tube is tangentially connected with the tube wall of the lower middle of the swirler. As rotational-flow sediment, oil (dross) air flotation and filtering separating are integrated, and novel comet filter materials are adopted, the treatment load is increased, and the device area is reduced.

Description

technical field [0001] The invention belongs to the field of industrial sewage purification treatment, especially relates to the separation of sediment, oil and suspended matter in sewage, and adopts automatic sewage treatment equipment for cyclone separation, air flotation separation and filtration separation, specifically an automatic sewage treatment equipment for Modular three-phase separation device for sludge and oily wastewater treatment. Background technique [0002] With the strengthening of people's awareness of environmental protection, higher requirements have been placed on the impact of wastewater discharged from industrial and mining enterprises on the surrounding environment. For example, oilfield wastewater containing a large amount of suspended solids, oil and sediment, traditional treatment Methods include sedimentation, air flotation, etc., but they all have their limitations, and are affected by many factors such as pollutant composition in wastewater, w...

AI Technical Summary

Problems solved by technology

The cavity formed by the cyclone cylinder and the tank body mentioned in this patent is similar to an inverted funnel, the lower part is wide and the upper part is narrow, and the sewage enters from the lower part. This structure cannot form an effective swirling fluid; the connection between the cone and the cylinder is sharp. , which greatly affects the swirl flow; eventually resulting in poor swirl separation effect

When the dissolved air water enters the wide bottom of the cyclone cylinder from the inlet pipe, the pressure drops instantly, and a large number of microbubbles released will hinder the formation of the swirl fluid in the wide lower part and narrow upper part, and the unstable swirl structure It also greatly affects the effect of dissolved air release

The setting method of the oil collection tank is likely to cause a high water content in the discharged dirty oil

The filter unit proposed in this patent adopts a large-resistance water distribution method, which is not conducive to uniform backwashing and is easy to form a biased flow; the upper part of the filter bed mentioned in this patent uses a filter to block the filter material, corresponding to fine-grained quartz sand and anthracite, etc. This method is basically The blocking effect cannot be realized, and the backwash expansion space is limited, and a large amount of material running out during backwash operation is inevitable

The matching nozzles and instruments of this patent are many, the operation is complicated, the failure rate is high, and the practicability is not strong

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