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A tail water safety discharge system of a sewage treatment plant and its control method

A sewage treatment plant, safe discharge technology, applied in water treatment parameter control, water/sewage treatment, water/sludge/sewage treatment, etc. The effect of high stability and low operating cost

Active Publication Date: 2020-06-23
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention is only designed for small-scale drainage of rainwater and sewage discharge, and does not explain the measurement and control of water quality and water level in sewage treatment plants

Method used

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  • A tail water safety discharge system of a sewage treatment plant and its control method
  • A tail water safety discharge system of a sewage treatment plant and its control method
  • A tail water safety discharge system of a sewage treatment plant and its control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] When the measured water level is 4.2m≤normal water level 5.0m, the discharge control system 3-1 controls the intelligent lifting weir plate 1-4 to maintain the original set height of 3.9m, and the drainage control valve 3-4 is normally opened;

[0050] The water quality in the monitoring well 1-3 is measured by the water quality monitor 3-3, and the data is fed back to the discharge control system 3-1; when the measured value of COD is 35mg / L≤the measured value of COD is 50mg / L, and the measured value of ammonia nitrogen is 3.5mg / L≤ammonia nitrogen Measured value 5mg / L, TN measured value 12.5mg / L≤TN measured value 15mg / L, TP measured value 0.32mg / L≤TP measured value 0.5mg / L, emission control system 3-1 controls intelligent lifting weir plate 1 -4 maintains the original set height, and the drainage control valve 3-4 is normally opened.

Embodiment 2

[0052] Others are the same as embodiment 1, the difference is:

[0053] When the measured water level is 5.5m>normal water level 5.0m, the discharge control system 3-1 controls the intelligent lifting weir plate 1-4 to be higher than the original set height, and closes the drainage control valve 3-4 to ensure that the receiving water body 1-6 does not enter the monitoring Wells 1-3. Simultaneously start the sewage pump 2-1 through the accident pipeline 2-2, open the accident control valve 3-5, close the backflow control valve 3-6, and ensure that the tail water is discharged into the receiving water body 1-6.

Embodiment 3

[0055] Others are the same as embodiment 1, the difference is:

[0056] When the measured value of COD is 55 mg / L>the measured value of COD is 50 mg / L, the measured value of ammonia nitrogen is 4.5 mg / L≤the measured value of ammonia nitrogen is 5 mg / L, the measured value of TN is 11.2 mg / L≤the measured value of TN is 15 mg / L, and the measured value of TP is 0.41 mg When / L≤TP measurement value is 0.5mg / L, the discharge control system 3-1 controls the intelligent lifting weir plate 1-4 to be higher than the original set height, and closes the drainage control valve 3-4 to ensure that the receiving water body 1-6 does not enter the monitoring Wells 1-3. Simultaneously start the sewage pump 2-1 through the return pipe 2-3, open the return control valve 3-6, close the accident control valve 3-5, and ensure that the tail water returns to the sewage treatment plant 1-1.

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Abstract

The invention discloses a safety discharge system for tail water of a sewage treatment plant and a control method of the safety discharge system. The tail water of the sewage treatment plant is conveyed to a monitoring well through a sewage pipeline and passes through an intelligent hoisting weir plate; then the tail water enters into a discharge pipeline; finally, the tail water is discharged into a receiving water body; when a measured water level is greater than a set normal water level or when measured water quality is greater than a stipulated discharge index, the intelligent hoisting weir plate, an accident pipeline or a refluxing pipeline is hoisted to realize safety discharge of the tail water of the sewage plant. By adopting the safety discharge system disclosed by the invention,accident discharge problems that discharged water of the tail water of the sewage treatment plant is recharged, the water quality non-up-to-standard discharge and the like are effectively solved; thesafety discharge of the tail water can be realized and the water environment quality of the receiving water body is protected. The safety discharge system disclosed by the invention has the advantagesof dynamic acquisition, real-time monitoring and in-time processing and controlling of data, high intelligent degree, low infrastructure construction investment and low operation cost.

Description

technical field [0001] The invention belongs to the field of sewage treatment and water environment treatment, and in particular relates to a tail water safety discharge device and a control method of a sewage treatment plant. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of water environment governance requirements, the safe and effective operation of sewage treatment plants has attracted more and more attention. The sewage treatment plant significantly reduces the pollution load, reduces water pollution, and protects the receiving water body and the surrounding water environment. The sewage treatment plant is responsible for the treatment and standard discharge of sewage collected through sewage management. At present, the tail water discharge of sewage treatment plants is troubled by factors such as fluctuations in the water level of the receiving water body, and the water quality of the tail water cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00
CPCC02F1/00C02F2103/001C02F2209/003C02F2209/005C02F2209/06C02F2209/08C02F2209/15C02F2209/16C02F2209/18
Inventor 许明薛朝霞沈晓笑操家顺
Owner HOHAI UNIV
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