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Sewage treatment energy-saving control method and control system based on double-variable two-dimensional table

A technology for energy-saving control and sewage treatment, which is applied in the direction of water treatment parameter control, water/sludge/sewage treatment, sustainable biological treatment, etc. It can solve the problems of long lag time, fan surge, and the inability to adapt to complex biochemical reactions in the sewage treatment process. and other issues, to achieve the effect of improving energy utilization, high efficiency and energy saving, and large processing potential

Active Publication Date: 2016-05-04
BEIJING JINKONG DATA TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Some of the existing methods of using mathematical models or intelligent algorithms for frequency conversion regulation to achieve energy saving are mostly theoretical, and many practical problems will arise in the process of application to engineering practice, such as fan surge, high detection accuracy requirements for instruments, Long lag time, complicated operation, etc., which affect its use in engineering
However, the use of PID and other control algorithms for adjustment cannot adapt to the characteristics of complex biochemical reactions in the sewage treatment process, resulting in large fluctuations in effluent quality

Method used

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  • Sewage treatment energy-saving control method and control system based on double-variable two-dimensional table
  • Sewage treatment energy-saving control method and control system based on double-variable two-dimensional table
  • Sewage treatment energy-saving control method and control system based on double-variable two-dimensional table

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Embodiment 1: Take the maximum blower frequency as 50 Hz and the number of blowers as 2 as an example.

[0085] Among them, Table 1 is the two-variable frequency conversion and speed regulation of two commonly used blowers in a 50,000-ton sewage treatment plant. Table 2. The parameters are set according to the good operation of the equipment, and the formation is based on the expert knowledge base. Table, where the abscissa is the chemical oxygen demand of the water body, and the ordinate is the influent flow. The " / " slash in Table 1 indicates the actual operating frequency of the blower. When the calculated blower frequency is greater than 50Hz and less than 55Hz, press 50Hz running, i.e. a single blower operates at maximum frequency. The specific frequency modulation process is:

[0086] 1. Establish a bivariate two-dimensional table 2 in the host computer with the gradually increasing influent flow Q and water chemical oxygen demand P as variables, where the inters...

Embodiment 2

[0099] Embodiment 2: Take the maximum frequency of the blower as 50 Hz and the number of blowers as n as an example.

[0100] 1. Establish a bivariate two-dimensional table n in the host computer with the gradually increasing influent flow Q and water chemical oxygen demand P as variables, where the intersection point of the bivariate corresponds to the gradually increasing theoretical output frequency of the blower value f ij ;

[0101] 2. Input the number n of blowers in the current working state to the upper computer, and the upper computer will automatically adjust to the double-variable two-dimensional table n, and the intelligent controller collects the current progress that is periodically intercepted by the influent flow meter and the chemical oxygen demand meter. The water flow Q' and the current water chemical oxygen demand P' are uploaded to the host computer, and the host computer collects and uploads the current influent flow Q' and the current water chemical oxy...

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Abstract

The invention provides a sewage treatment energy saving control method and control system based on a bivariate two-dimensional table. The sewage treatment energy saving control method and control system are used to adjust the output frequency and practical working table number of air blowers reasonably according to the sewage flow and the change of chemical oxygen demand in water. The control method comprises the steps of establishing a bivariate two-dimensional table n that takes gradually increasing water inflow Q and water chemical oxygen demand P as variables respectively to simultaneously intercept current water inflow Q' and current water chemical oxygen demand P' at regular intervals; and acquiring the theoretical output frequency value fij of the current air blowers and the theoretical working table number n of the air blowers according to cross positioning carried out on Q' and P' in the bivariate two-dimensional table n; carrying out real-time adjustment on the output frequency and the practical working table number n' of the air blowers according to the current theoretical output frequency value fij and the theoretical working table number n. The control method and control system have the beneficial effects of realizing the frequency control of intelligent control air blowers, and avoiding incomplete sewage treatment when the frequency of the air blowers is too low or the waste of resources caused when the frequency of the air blowers is too high.

Description

technical field [0001] The invention relates to an energy-saving control method and an energy-saving control system for sewage treatment. More specifically, the present invention relates to an energy-saving control method and control system for sewage treatment based on a double-variable two-dimensional table. Background technique [0002] my country's urban sewage treatment is one of the industries with high energy consumption. On the one hand, high energy consumption has resulted in high operating costs of sewage treatment facilities. On the other hand, it has also exacerbated my country's current energy crisis and environmental pollution to a certain extent. With the continuous increase of sewage treatment plants, the energy consumption of sewage treatment plants has attracted more and more attention. Sewage treatment plants must study various new technologies for energy saving and consumption reduction, such as implementing the goal of energy saving and consumption redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F7/00
CPCC02F7/00C02F2209/08C02F2209/40Y02W10/10
Inventor 杨斌刘萌任艳真
Owner BEIJING JINKONG DATA TECH
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