Intelligent zero-discharge drainage method and drainage sedimentation tank applying same

Abstract

The invention discloses an intelligent zero-discharge drainage method. The method comprises the following steps: S1, setting the maximum value H<set> / t of the water taking depth of an undisturbed settling zone of a drainage pump, S2, metering the time t when the first-stage supernatant depth H1 of water sedimentation in the tank body reaches H<set>, wherein the initial sedimentation velocity V<sedimentation> of particles in the tank body is equal to H<set> / t, S3, when the depth H1 of the supernatant reaches H<set>, starting the drainage pump, S4, setting the water outlet speed V<water> equal to V<sink>-A, wherein A is a safety value, S5, setting the flow Q1 of the drainage pump equal to V<water>*S, wherein S is the sedimentation area of the tank body, and setting Q1 during initial operation equal to (H <set> / t-A)*S, and S6, with the time t as a period, monitoring the supernatant depth of the second stage to be H2 and the particle settling velocity V<settling>2 in the second stage to beH2 / t, and repeating the steps S3 to S5, so that dynamic control is achieved, and water outflow can be intelligently controlled. The invention further provides a drainage sedimentation tank applying the intelligent zero-discharge drainage method, and the sedimentation tank is small in occupied area and high in sedimentation efficiency.

Description

Technical field [0001] The invention relates to an intelligent zero-discharge drainage method, which belongs to the technical field of sewage treatment. Background technique [0002] The sedimentation tank is a treatment structure that uses gravity sedimentation to remove suspended particles with a density greater than water from the water. It is one of the most widely used treatment institutions in sewage treatment. It can be used for wastewater treatment, biological treatment post-treatment and advanced treatment Wait. [0003] At present, the commonly used sedimentation tanks on the market include inclined tube sedimentation tanks, advection sedimentation tanks, vertical flow sedimentation tanks, and amplitude-flow sedimentation tanks. There are some problems in these types of sedimentation tanks: the maintenance and management of the inclined tube sedimentation tank is difficult, and the inclined tube needs to be replaced after a period of use; the advection sedimentation tank...

AI Technical Summary

Problems solved by technology

There are some problems in these types of sedimentation tanks: the maintenance and management of the inclined tube sedimentation tank is difficult, and the inclined tube needs to be replaced after a period of use; The depth is large, the construction is difficult, and the cost is high; the radial flow sedimentation tank covers a large area, the mechanical sludge removal equipment is complex, and the construction quality is high.

In actual sewage treatment operations, intermittent water inflow and large instantaneous water inflow often occur, which requires good matching of subsequent processes. The above-mentioned several commonly used sedimentation tanks are not suitable for this situation, and cannot be quickly settled and intelligent. Water out to meet subsequent process requirements

However, the traditional sedimentation tank handles this kind of intermittent water inflow, which requires a large area or high cost in the case of a large amount of water inflow in an instant, which is low in cost performance and wastes resources.

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