An energy-saving control method for sewage treatment based on three-variable three-dimensional tables

Abstract

The invention discloses a sewage treatment energy-saving control method based on a three-variable three-dimensional table. According to the sewage treatment energy-saving control method based on the three-variable three-dimensional table, the output frequency of air blowers is adjusted according to the change of the sewage inflow rate, the water inflow chemical oxygen demand and the water effluent chemical oxygen demand deviation. The sewage treatment energy-saving control method based on the three-variable three-dimensional table comprises the steps that the three-dimensional table with the gradually increasing sewage inflow rate Q, the gradually increasing water inflow chemical oxygen demand P and the gradually increasing water effluent chemical oxygen demand deviation delta C used as the three variables, and the corresponding theoretical number n of working air blowers and the theoretical output frequency values (please see the specification for the symbol) of the air blowers are increased or decreased along with the increasing or decreasing of the gradually increasing sewage inflow rate Q, the gradually increasing water inflow chemical oxygen demand P and the gradually increasing water effluent chemical oxygen demand deviation delta C; the current water inflow rate Q', the current water inflow chemical oxygen demand P' and the current water effluent chemical oxygen demand C are obtained regularly; the water effluent chemical oxygen demand deviation delta C is calculated according to the current water effluent chemical oxygen demand deviation C and a water chemical oxygen demand discharging standard value; the current theoretical number n of working air blowers and the current theoretical output frequency values (please see the specification for the symbol) of the air blowers are obtained by positioning the current water inflow rate Q', the current water inflow chemical oxygen demand P' and the water effluent chemical oxygen demand deviation delta C in the three-dimensional table, and then the number n' of actually-working air blowers and the actual output frequency of the air blowers are adjusted in real time. According to the sewage treatment energy-saving control method based on the three-variable three-dimensional table, the frequency and the number of the air blowers can be adjusted intelligently, and thus the situation that the sewage treatment capacity is not high enough due to the fact that the frequency of the air blowers is too low or waste is caused due to the fact that frequency of the air blowers is too high is avoided.

Description

technical field [0001] The invention relates to an energy-saving control method used in the case of sewage treatment. More specifically, the present invention relates to an energy-saving control method for sewage treatment based on a three-variable three-dimensional table used in the case of sewage treatment. Background technique [0002] On the one hand, the high energy consumption of urban sewage treatment has caused high operating costs of sewage treatment facilities, and on the other hand, it has also exacerbated the energy crisis and environmental pollution in my country at this stage. 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, so as to reduce the cost of sewage treatment and improve economic and environmental benefits. [0003] In the operating cost of convention...

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Problems solved by technology

[0005] Another object of the present invention is to provide a method for establishing a three-dimensional table with three variables, which can establish a three-dimensional table with the influent flow rate Q, the chemical oxygen demand of the influent water body P, and the deviation ΔC of the effluent chemical oxygen demand as three variables to realize The precise control of sewage drainage can exert high-efficiency and energy-saving effects in projects, and solve the problems that existing theoretical methods are difficult to apply in practice

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