Supernatant extracting device of sludge tank of sewage treatment plant

Abstract

The invention discloses a supernatant extracting device of a sludge tank of a sewage treatment plant and belongs to the field of urban sewage treatment. The supernatant extracting device comprises a floating water taking device, a floating connecting device, a communication device, a concentration acquisition device, a connecting pipe, a connection switching device, a transition water pipe, a water outlet pipe and a control device, wherein the floating water taking device is mounted on the water surface of the sludge tank; the floating connecting device is mounted between the floating water taking device and the concentration acquisition device; the communication device is mounted on the connecting pipe; the concentration acquisition device is mounted on the connecting pipe; the connecting pipe is mounted between the connection switching device and the floating water taking device; the connection switching device is mounted between the transition water pipe and the connecting pipe; the control device is mounted in the middle of the water outlet pipe. The supernatant extracting device has the characteristics of capability of recycling a supernatant of the sludge tank, reducing water waste and improving sludge extraction and dehydration efficiency.

Description

technical field [0001] The invention belongs to the field of urban sewage treatment, in particular to a supernatant extracting device of a sludge tank of a sewage treatment plant. Background technique [0002] The sludge tank is an important facility of the urban sewage treatment plant. Most of the existing sewage treatment plants collect the sludge into the sludge tank after the process of sedimentation, filtration, biological sedimentation, re-filtration, sludge concentration and other processes; Among them, the concentration tank is the last process of the sludge tank. The concentrated sludge enters the sludge tank through the principle of siphon, and at the same time, the water mixed with the sludge also enters the sludge tank together with the sludge; the sludge in the sludge tank After re-sedimentation, the sludge is pumped out to the sludge transport equipment by the sludge pump supporting the sludge tank, and the sludge is transported to the specified place for the n...

AI Technical Summary

Problems solved by technology

[0002] The sludge tank is an important facility of the urban sewage treatment plant. Most of the existing sewage treatment plants collect the sludge into the sludge tank after the process of sedimentation, filtration, biological sedimentation, re-filtration, sludge concentration and other processes; Among them, the concentration tank is the last process of the sludge tank. The concentrated sludge enters the sludge tank through the principle of siphon, and at the same time, the water mixed with the sludge also enters the sludge tank together with the sludge; the sludge in the sludge tank After re-sedimentation, the sludge is pumped out to the sludge transport equipment by the sludge pump supporting the sludge tank, and the sludge is transported to the specified place for the next step of treatment; since the sludge in the sludge tank is together with water, after sedimentation Finally, relatively clear water is formed on the upper part of the sludge tank, commonly known as the supernatant. When the sludge pump pumps the sludge in the sludge tank, the water will be pumped away together, which wastes the pumping of the sludge pump in vain. At the same time, due to the high water content of the pumped sludge, when it is exported to the means of transportation, the sewage will flow everywhere, causing new environmental pollution

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