Constant water level discharge system for municipal wastewater collecting well and discharge method of constant water level discharge system

Abstract

The invention discloses a constant water level discharge system for a municipal wastewater collecting well. The system comprises the municipal wastewater collecting well, a wastewater channel, a draining pump, a water supply pressure well, a water supply channel, a high-position water outlet well, a high-position water outlet well water outlet, a control module and a draining pump motor, wherein an upper-limit water level sensor and a lower-limit water level sensor are arranged at the top of the municipal wastewater collecting well; the wastewater channel is connected with the municipal wastewater collecting well; a water inlet of the draining pump is connected with the wastewater channel; the water supply pressure well is connected with the draining pump; a water inlet of the water supply channel is connected to the water supply pressure well; the high-position water outlet well is connected with a water outlet of the water supply channel; the high-position water outlet well water outlet is used for conveying sewage to a sewage treatment tank; and the control module receives the wastewater level detected by the upper-limit water level sensor and the lower-limit water level sensor and performs frequency conversion control on the draining pump motor and controls drainage flow of the draining pump. According to the invention, frequency conversion control is performed on the draining pump, so that the water level of the wastewater collecting well of a draining pump station is stabilized in a range of a preset value, and the phenomena that the water level of the wastewater collecting well fluctuates wildly and the draining pump motor is started frequently are prevented.

Description

technical field [0001] The invention relates to an urban wastewater technology, in particular to an urban wastewater collection well uniform water level discharge system and a discharge method thereof. Background technique [0002] Urban drainage system is a system facility for treating and removing various urban wastewater, an important part of urban public facilities, and an important system for modern urban safety and environmental protection. my country's rapid economic development for decades has accelerated the urbanization of rural areas and the expansion of urban buildings; since the beginning of this century, the rapid development of my country's urban construction and real estate industry has also promoted the construction of urban drainage facilities, making my country's urban drainage capacity greatly improved. enhanced. To test the drainage capacity of a city, not only must it be able to quickly and smoothly discharge the sewage and rainwater of the entire city ...

AI Technical Summary

Problems solved by technology

According to the operating principle of the motor, when it is started from a static state, its energy consumption is 2-7 times that of normal operation. If multiple units are started at the same time, the voltage of the entire power supply network will drop, so frequent startup of urban drainage pumps is a waste of energy. , which will cause the instability of the power supply network; at the same time, frequent start-up of urban drainage pumps will also cause greater losses to the pump equipment and motors, thus reducing the frequent start-up of high-power motors is the main means to stabilize the power supply network and save electric energy

[0004] Looking at the existing urban drainage pumping station technology, the water level information is generally obtained from the urban wastewater collection well, the motor driver is started by the water level sensor, and then the pump motor is started by the motor driver; when the water level in the urban wastewater collection well drops to the control line When the water level sensor turns off the motor driver, and then turns off the water pump motor; when the water level of the urban waste water collection well rises again, the water level sensor starts the motor driver, and starts the pump motor in turn, so frequently repeated, the motor starts frequently, resulting in energy consumption increase, equipment damage

Due to the fluctuation of the upper and lower levels of the urban wastewater collection well, it also causes the flow fluctuation of the urban sewer. The inertial fluctuation of the sewer is collected in the wastewater collection well of the drainage pumping station, which also causes the water level fluctuation in the collection well. To trigger the drainage pump motor frequently, so that the drainage pump motor starts more frequently, the vicious cycle causes frequent equipment damage, high energy consumption, and frequent "tripping" of the power supply network

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