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Method for controlling automatic flocculant addition

A technology of automatic dosing and flocculant, applied in electrical program control, flocculation/sedimentation water/sewage treatment, program control in sequence/logic controllers, etc. The effect of processing cost, ensuring stability, and reducing waste of chemicals

Inactive Publication Date: 2010-06-02
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, with the rapid development of society, sewage treatment plants have gradually popularized the use of on-line monitors instead of manual testing to detect the main indicators of water, so that the expensive online monitors purchased are only used as online monitoring systems, and are not considered for other purposes.

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  • Method for controlling automatic flocculant addition

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Embodiment Construction

[0035] The present invention and its specific implementations will be described in further detail below in conjunction with the accompanying drawings.

[0036] Flocculant automatic dosing control system, including feedback control system, PLC control system, metering pump, mixer and filter tank; It is composed of an online TP monitor for phosphorus content and an online SS tester for measuring the content of suspended solids in sewage. The input terminals are connected, the output terminals of the flow meter, online TP monitor, and online SS measuring instrument are respectively connected with the input terminals of the PLC control system, and the output terminals of the PLC control system are connected with metering pumps, mixers, and filter tanks in turn.

[0037] The flocculant automatic dosing control method of the present invention comprises the following steps,

[0038] A. Use a flow meter to measure the sewage flow;

[0039] B. Utilize the online TP analyzer to measur...

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PUM

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Abstract

The invention discloses a method for controlling automatic flocculant addition, which belongs to the field of sewage treatment. A feedback control system determines the flow of sewage and the concentration of TP and SS after sewage treatment and feeds back determination results to a PLC control system; and the PLC control system performs calculation by using undetermined parameters through a formula as follows: delta X dosage=k*Q*L*(P-1.1A)a*(S-1.05B)b / (lambda*N)according to the feedback of the feedback control system of the flow, the TP and the SS to indirectly determine the dosage of flocculant. The invention can regulate the dosage of the flocculant in time according to the coagulation effect of the sewage treatment and ensure the optimal dosage of the flocculant and the effect of the sewage treatment.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to an automatic dosing control method for micro-flocculation filtration or coagulation sedimentation filtration. Background technique [0002] At present, the whole world is facing the problem of shortage of water resources. As a limited resource, the recycling of water, that is, the advanced treatment of sewage, has become the only way to solve the problem. [0003] Research and development of economical and efficient sewage advanced treatment technology has urgent practical significance for reducing the total amount of pollutants, improving the water environment, creating a good water environment and improving people's quality of life. Advanced treatment generally adopts micro-flocculation filtration or coagulation-sedimentation filtration process to further remove the main pollutants in the secondary effluent, and the flocculant added is the main operating cost of micro-flocculation f...

Claims

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Application Information

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IPC IPC(8): C02F1/52G05B19/05
Inventor 李轶刘志刚
Owner HOHAI UNIV
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