Optimal energy consumption control device and method for air-blast system of sewage treatment plant

Abstract

The invention discloses an optimal energy consumption control device and method for an air-blast system of a sewage treatment plant. The device comprises an air blower optimum operating condition control module, used for controlling an air blower in an operating state to be positioned in the optimum operating condition under the precondition of satisfying a given total blast capacity, improving anefficiency of the air blower, and reducing the energy consumption of the air blower; a valve compensation adjusting module, used for controlling a valve to be positioned in the greatest opening degree under the precondition of satisfying the air flow distribution of an aerating system, reducing a total pressure of the aerating system, and reducing the pressure loss of the aerating system; an aerator stoppage judging module, used for monitoring a stoppage condition of an aerator and prompting a corresponding operation, reducing the resistance loss of the aerator, and improving an overall efficiency of the aerating system; and an aerating system energy consumption analyzing module, used for calculating a difference between the current operating condition energy consumption of the aerating system and the optimum operating condition energy consumption. The device and the method are capable of effectively improving the overall efficiency of the air-blast system, reducing the overall energyconsumption of the air-blast system, and improving the operation management level of the sewage treatment plant.

Description

technical field [0001] The invention relates to the technical field of urban sewage treatment, in particular to a control device and method for optimal energy consumption of a blast system of a sewage treatment plant. Background technique [0002] The mainstream process of sewage treatment in my country includes AAO (Anaerobic-Anoxic-Oxic, anaerobic-anoxic-aerobic method), OD (Oxidation Ditch, oxidation ditch) and SBR (Sequencing Batch Reactor, sequencing batch activated sludge method), among which AAO And the SBR process adopts the blower aeration technology, and the OD mainly adopts the surface aeration technology. In recent years, due to the good mixing performance and better oxygenation efficiency of blast aeration, more and more OD processes have changed surface aeration to blast aeration system in the process of design or upgrading. The energy consumption of blast aeration accounts for 50%-60% of the energy consumption of sewage treatment plants. Improving the operati...

AI Technical Summary

Problems solved by technology

At present, there are several problems in the blower control process: (1) First, the lack of understanding and control of the outlet air pressure

The outlet pressure of the blower is only used as a protection parameter for blower anti-surge, not as a system optimization target, which has an impact on process design and equipment selection

(2) Secondly, there is a lack of efficient operation of multiple fans connected in parallel

For the case of parallel operation of multiple blowers, how to control the opening and combination of each blower so that the blowers can be in the high-efficiency range as much as possible under the premise of meeting the air volume demand, there is currently no effective solution

(3) Third, there is a lack of overall analysis and control of the pressure loss of the blast system

(4) Finally, there is a lack of automatic control equipment and devices

At present, there is still a lack of control devices for the pressure loss of the aeration system. Even with a good control method, it is difficult to achieve timely adjustment and control by manpower, so it is difficult to ensure the optimal effect

[0005] In addition, in related technologies, when multiple fans are running in groups, according to the principle of air volume superposition, adjusting a single fan cannot maintain the highest overall efficiency; the valve openings of multi-branch lines are severely coupled, and mutual interference causes the opening to not be maintained at the maximum. The pressure loss cannot be minimized; the pressure loss of the aerator is difficult to monitor in real time, and there is a lack of effective control measures to avoid contamination and blockage

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