Sewage aeration system
By controlling the operation of the Roots blower with a frequency converter, the problems of high energy consumption and high failure rate of the existing sewage aeration system have been solved, and the stability and energy efficiency of the equipment have been improved, while noise pollution and electrical damage have been reduced.
Patent Information
- Application Number
- CN202423238138.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing wastewater aeration systems are noisy, generate a lot of heat, have heavy loads, consume a lot of power, are prone to damage, have a high electrical failure rate, and are prone to low voltage loss and tripping when starting large motors, affecting system efficiency and stability.
The operation of the Roots blower is controlled by a frequency converter. By adjusting the output frequency, the air flow and aeration pressure are kept constant. Interlock control and temperature controller are set up to reduce the frequency of equipment start-up and motor load, thereby reducing energy consumption and failure rate.
It significantly reduces energy consumption and failure rate, reduces mechanical wear and noise pollution, improves equipment stability and ease of operation, increases motor efficiency to over 90%, and reduces electrical damage and noise pollution.
Smart Images
Figure CN223737843U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a sewage treatment equipment, especially a sewage aeration system. BACKGROUND
[0002] In the existing sewage aeration system, three-blade Roots blower is mainly used as the aeration host, and the star-delta step-down starting control is used for the electric control system, and the system works in the power frequency state. This configuration has multiple defects: large noise, high heat, heavy load and large power consumption during work; large equipment operating current, high energy consumption and easy heating, which often leads to damage of electrical appliances and motors, high electrical failure rate and frequent maintenance. In addition, when other places have large motor starting, the input voltage is reduced, and the contactor is prone to low-voltage loss of voltage tripping. These problems lead to the deficiencies of the prior art in efficiency, energy consumption, stability and environmental impact. SUMMARY
[0003] The utility model aims at providing a sewage aeration system.
[0004] To achieve the above-mentioned purpose, the utility model is implemented according to the following technical scheme:
[0005] The utility model discloses a sewage aeration system which comprises at least one oxygen-consuming pool, at least two Roots blowers, at least one frequency converter for controlling the operation of the Roots blowers, and an interlocking control device for preventing the simultaneous starting of the Roots blowers.
[0006] The power input end of the frequency converter is connected with a circuit breaker, the output end of the frequency converter is provided with at least two AC contactors, the control ends of the two AC contactors are connected with the control ends of the two Roots blowers respectively, the Roots blowers are controlled to start and stop, and a set of buttons for controlling starting and stopping are arranged correspondingly on the frequency converter and the contactors.
[0007] The frequency converter is provided with a frequency meter, the frequency meter is connected with the frequency signal output end of the frequency converter, is used for showing the current output frequency of the frequency converter, a temperature controller is further arranged in the electric control cabinet, the temperature monitoring end of the temperature controller is arranged near the frequency converter, is used for monitoring the temperature near the frequency converter, an exhaust fan is further arranged on the electric control cabinet, the control end of the exhaust fan is connected with the control signal output end of the temperature controller, the exhaust fan is started when the temperature is set to 37 DEG C and is stopped when the temperature is set to 32 DEG C.
[0008] Preferably, the frequency regulation range of the frequency converter is 39Hz to 45Hz. The output frequency of the frequency converter is 39.5Hz when the water depth of the oxygen-consuming pool is 8 meters, so as to keep the aeration pressure at 52KPa; and is 41.5Hz when the water depth of the oxygen-consuming pool is 9 meters, so as to keep the aeration pressure at 56KPa.
[0009] The utility model discloses the beneficial effect is:
[0010] The utility model relates to a sewage aeration system, compared with the prior art, the utility model has the following technical effects:
[0011] Reduce energy consumption and failure rate: by using frequency converter control motor, keep constant pressure and flow, significantly reduce energy consumption and failure rate.
[0012] Reduce mechanical wear and tear: reduce the operating frequency, reduce mechanical wear and tear, prolong the service life of bearing and gear.
[0013] Reduce electrical failure rate: motor power consumption, current, heat reduction, reduce the electrical damage, reduce the electrical failure rate.
[0014] Reduce noise pollution: the noise of improved system is reduced significantly, reduce the noise pollution to the environment.
[0015] Improve operation convenience: convenient operation, switching freely, protect the system precision, numerical control is obviously convenient.
[0016] Improve energy efficiency: after adopting frequency conversion system, the motor efficiency is improved to 90% or above, power consumption reduces, reaches the requirement of energy saving and consumption reduction. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the structural schematic diagram of the utility model;
[0018] Figure 2 It is the control circuit structure principle drawing of the utility model. DETAILED DESCRIPTION
[0019] The utility model will be further described below in conjunction with the drawings and specific embodiment, the illustrative embodiment of the utility model and the explanation used to explain the utility model, but not as the limitation of the utility model.
[0020] As Figure 1 And Figure 2The utility model discloses a kind of oxygen consumption pools, and the utility model discloses at least one oxygen consumption pool, 1,2 in drawing are oxygen consumption pool;At least two Roots blowers, M1-M4 in drawing, the Roots blower provides oxygen to oxygen consumption pool;At least one frequency converter for controlling the operation of the Roots blower;The frequency converter adjusts output frequency according to the water depth of oxygen consumption pool, keeps constant aeration pressure and gas flow;Interlock control is equipped between the Roots blower and frequency converter to prevent two Roots blowers simultaneously start running.
[0021] The power input end of the frequency converter is connected with a circuit breaker, the output end of the frequency converter is provided with at least two AC contactors, the control ends of the two AC contactors are connected with the control ends of the two Roots blowers respectively, the Roots blowers are controlled to start and stop, and a set of buttons for controlling starting and stopping are provided for the frequency converter and the contactor.
[0022] The frequency converter is provided with a frequency meter, the frequency meter is connected with the frequency signal output end of the frequency converter, and the current output frequency of the frequency converter is displayed, a temperature controller is further arranged in the electric control cabinet, the temperature monitoring end of the temperature controller is arranged near the frequency converter, the temperature near the frequency converter is monitored, an exhaust fan is further arranged on the electric control cabinet, the control end of the exhaust fan is connected with the control signal output end of the temperature controller, the exhaust fan is started when the temperature is set to 37 DEG C, and the exhaust fan is stopped when the temperature is 32 DEG C.
[0023] Preferably, the frequency adjustment range of the frequency converter is 39Hz to 45Hz. The output frequency of the frequency converter is 39.5Hz when the water depth of the oxygen consumption pool is 8 meters, so as to keep the aeration pressure as 52KPa; and the output frequency of the frequency converter is 41.5Hz when the water depth of the oxygen consumption pool is 9 meters, so as to keep the aeration pressure as 56KPa.
[0024] Control logic: open emergency stop switch SE → control power on → power indicator HL1 bright → start SB1 → contactor KM1 attracted → frequency converter G1 start → 1# fan running (so when the frequency converter G1 output frequency is slightly low, click the frequency plus button SB5, the frequency converter G1 output frequency increases; so when the frequency converter G1 output frequency is slightly high, click the frequency minus button SB6, the frequency converter output frequency decreases; or start SB3 → contactor KM2 attracted → frequency converter G1 start → 2# fan running (so when the frequency converter G1 output frequency is slightly low, click the frequency plus button SB5, the frequency converter G1 output frequency increases; so when the frequency converter G1 output frequency is slightly high, click the frequency minus button SB6, the frequency converter output frequency decreases; start SB7 → contactor KM3 attracted → frequency converter G2 start → 3# fan running (so when the frequency converter G2 output frequency is slightly low, click the frequency plus button SB11, the frequency converter G2 output frequency increases; so when the frequency converter G2 output frequency is slightly high, click the frequency minus button SB12, the frequency converter output frequency decreases; or start SB9 → contactor KM4 attracted → frequency converter G2 start → 4# fan running (so when the frequency converter G2 output frequency is slightly low, click the frequency plus button SB11, the frequency converter G2 output frequency increases; so when the frequency converter G2 output frequency is slightly high, click the frequency minus button SB12, the frequency converter output frequency decreases; press button SB2 1# fan stops running, press button SB4 2# fan stops running, press button SB8 3# fan stops running, press button SB10 4# fan stops running.
[0025] ①Frequency converter output control motor, when the oxygen consumption pool water depth is 8 meters, the aeration pressure is 52 KPa, the frequency converter output frequency is 39.5 Hz, and the air flow is maintained; when the oxygen consumption pool water depth is 9 meters, the aeration pressure is 56 KPa, the frequency converter output frequency is high (41.5 Hz), and the air flow is maintained.
[0026] ②Two Roots blowers share one frequency converter, and four Roots blowers are used in two oxygen consumption pools, one standby and one in use for each pool; when one Roots blower fails, it can be switched to another Roots blower, and the two Roots blowers are electrically interlocked and cannot be started and run at the same time.
[0027] ③ Circuit breaker QF1 power access frequency converter G1, frequency converter G1 output to two 63A AC contactor KM1, KM2 (model: CJX1-63), AC contactor KM1 output to Roots blower motor M1, AC contactor KM2 output to Roots blower motor M2, using KM1 and KM2 interlocking control, when the start button SB1 is pressed, the contactor KM1 is attracted, the contactor KM2 is not attracted, when the start button SB3 is pressed, the contactor KM2 is attracted, the contactor KM1 is not attracted; SB2 is a 1# stop button, SB4 is a 2# stop button, SB5 is a frequency increase button of frequency converter G1, SB6 is a frequency decrease button of frequency converter G1.
[0028] ④ Circuit breaker QF2 power access frequency converter G2, frequency converter G2 output to two 63A AC contactor KM3, KM4 (model: CJX1-63), AC contactor KM3 output to Roots blower motor M3, AC contactor KM4 output to Roots blower motor M4, using KM3 and KM4 interlocking control, when the start button SB7 is pressed, the contactor KM3 is attracted, the contactor KM4 is not attracted, when the start button SB9 is pressed, the contactor KM4 is attracted, the contactor KM3 is not attracted; SB8 is a 3# stop button, SB10 is a 4# stop button, SB11 is a frequency increase button of frequency converter G2, SB12 is a frequency decrease button of frequency converter G2.
[0029] ⑤ Frequency converter start mode: when starting contactor KM1, the auxiliary contact of contactor KM1 connects the start end of frequency converter G1, DI1 and COM are connected, frequency converter G1 starts after 5S delay, the output power is connected to contactor KM1, and then to Roots blower motor M1 for operation; when starting contactor KM2, the auxiliary contact of contactor KM2 connects the start end of frequency converter G1, DI1 and COM are connected, frequency converter G1 starts after 5S delay, the output power is connected to contactor KM2, and then to Roots blower motor M2 for operation; when starting contactor KM3, the auxiliary contact of contactor KM3 connects the start end of frequency converter G2, DI1 and COM are connected, frequency converter G2 starts after 5S delay, the output power is connected to contactor KM3, and then to Roots blower motor M3 for operation; when starting contactor KM4, the auxiliary contact of contactor KM4 connects the start end of frequency converter G2, DI1 and COM are connected, frequency converter G2 starts after 5S delay, the output power is connected to contactor KM4, and then to Roots blower motor M4 for operation.
[0030] ⑥Frequency regulator of frequency converter: in order to make production normal operation, frequency converter frequency has done some limit, lower limit frequency is (39Hz), upper limit frequency is (45Hz), so can keep fan running in the best linear state, energy consumption, current, heat will be reduced accordingly, both achieve the requirement of energy saving and consumption reduction, can guarantee production again.If really need to adjust the operating frequency, such as frequency converter G1 click frequency increase button SB5, KA1 connects frequency converter G1 frequency increase input DI2 and COM, namely, the operating frequency is adjusted upwards, and the frequency table Hz can display the adjusted value; click frequency reduction button SB6, KA2 connects frequency converter G1 frequency reduction input DI3 and COM, namely, the operating frequency is adjusted downwards, and the frequency table Hz can display the adjusted value; frequency converter G2 click frequency increase button SB11, KA3 connects frequency converter G2 frequency increase input DI2 and COM, namely, the operating frequency is adjusted upwards, and the frequency table Hz can display the adjusted value; click frequency reduction button SB12, KA4 connects frequency converter G2 frequency reduction input DI2 and COM, namely, the operating frequency is adjusted downwards, and the frequency table Hz can display the adjusted value; the adjustment range of frequency converter G1 and G2 is limited between (39Hz-45Hz).
[0031] The technical scheme of the utility model is not limited by the above specific embodiments, and any technical modification according to the technical scheme of the utility model falls within the protection scope of the utility model.
Claims
1. A sewage aeration system, characterised in that, The utility model relates to a kind of oxygen consumption pool and the frequency conversion device of aeration system, including: At least one oxygen consumption pool; At least two Roots blowers, the Roots blower provides oxygen to oxygen consumption pool;At least one frequency converter for controlling the operation of the Roots blower;The frequency converter adjusts output frequency according to the water depth of oxygen consumption pool, keeps gas flow and aeration pressure constant;Interlock control is provided between the Roots blower and frequency converter to prevent two Roots blowers from starting operation simultaneously.
2. The sewage aeration system according to claim 1, characterized in that: The power input end of the frequency converter is connected with a circuit breaker, and the output end of the frequency converter is provided with at least two AC contactors, the control ends of the two AC contactors are connected with the control ends of the two Roots blowers respectively, to control the Roots blower to start and stop, and the frequency converter and the contactor are both correspondingly provided with a group of buttons for controlling start and stop.
3. A sewage aeration system according to claim 2, characterised in that: The frequency converter is provided with a frequency meter, the frequency meter is connected with the frequency signal output end of the frequency converter, to display the current output frequency of the frequency converter, and a temperature controller is further provided in the electric control cabinet, the temperature monitoring end of the temperature controller is placed near the frequency converter, to monitor the temperature near the frequency converter, and an exhaust fan is further provided on the electric control cabinet, the control end of the exhaust fan is connected with the control signal output end of the temperature controller, the exhaust fan starts when the temperature is set to 37℃, and stops when the temperature is 32℃.
4. The sewage aeration system of claim 3, wherein: The frequency adjustment range of the frequency converter is 39Hz to 45Hz.
5. The sewage aeration system of claim 4, wherein: The output frequency of the frequency converter is 39.5Hz when the water depth of oxygen consumption pool is 8 meters, to keep the aeration pressure at 52KPa, and is 41.5Hz when the water depth of oxygen consumption pool is 9 meters, to keep the aeration pressure at 56KPa.