Water injection type micropower decanter

Abstract

The invention discloses a water injection type micropower decanter. The water injection type micropower decanter comprises a main decanting pipe, multiple mask type anti-slag valves, a buoy, a decanting hose, a fixed water outlet pipe, a hose limit support, a main pipe limit support, a water outlet valve and a water charge pump, wherein the buoy is connected to the main decanting pipe provided with the multiple mask type anti-slag valves; the main decanting pipe is sequentially connected with the decanting hose and the fixed water outlet pipe to form the water injection self-floating type decanter, and the decanting hose and the main decanting pipe are subjected to limit floating and sinking by the hose limit support and the main pipe limit support respectively. The decanter structure is not complicated, only is fluid buoyancy utilized, the water charge pump is utilized for charging water to the decanter only in the early drainage stage, little power is needed, that is, unpowered decanting can be realized by trace power, and no muddy water enters the decanter in the drainage stage.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a water injection type micro-power decanter. Background technique [0002] The decanter, also known as the decanter, is one of the most critical mechanical equipment in the SBR process. It can be divided into siphon decanter, rotary decanter, self-floating decanter and mechanical decanter. [0003] For example, Huangmei County Urban Wastewater Treatment Plant under Huanggang Yigao Water Co., Ltd. adopts ICEAS process and adopts floating decanter. The working principle of the decanter is as follows: when aerating, the inflatable solenoid valve is opened, and the air compressor system periodically inflates the decanter to make the water collection pipe float up, and the drain is separated from the liquid surface to prevent sludge from entering the decanter ;When decanting, the exhaust solenoid valve is opened, and the high-pressure air in the decanter is discharged into the atmosp...

AI Technical Summary

Problems solved by technology

It can be seen that the maximum weir load of the original decanter exceeds the standard value by 23%, and the average weir load exceeds the standard value by 30%. Therefore, the settled activated sludge may be disturbed in the later stage of decanting, and even caused when the activated sludge settling performance is slightly poor. Mud phenomenon

[0006] 2) The existing decanter has high requirements on the control system of the air compressor, the after-sales service is very inconvenient, and the price is expensive: the central control system comes from the Canadian Pamir Company, which has no office in China. Currently, some ICEAS biochemical The air compressor control system of the pool is faulty, and the inflation and exhaust cannot be controlled. At present, it can only be replaced by a time relay

[0007] 3) The existing decanter has very high requirements on the quality of the water outlet valve: due to the quality problem of the decanter valve in the early stage of operation, the valve cannot be completely closed, resulting in muddy water entering the decanter during the aeration stage, and muddy water in the early stage of the water outlet, affecting the quality of the outlet water In the later period, the high-quality valve was replaced, and the problem of decanting water was basically improved, but there was still mud in the water in the early stage.

[0008] 4) The energy consumption of the existing decanter is high: currently two screw air compressors (Shanghai Wenjian JB-10A) are used with a single 7.5kw, and the power consumption is 120 degrees per day through the installation of meters, and the annual power consumption is: 43800kw.h (365*120), the average electricity cost is 0.74 yuan / kw.h, and the annual electricity cost of the decanter is about 32412 yuan

[0009] 5) The maintenance cost of the existing decanter is high: 2 air filters (70 yuan / piece), 2 oil filters (55 yuan / piece) and 2 oil separation cores (180 yuan / piece) need to be replaced every year ), air compressor special oil 16L (650 yuan / 18 liters), four ICEAS pools with a total of 16 solenoid valves (8 DN50, 8 DN25), plastic solenoid valves are replaced every 5 years, DN50 each 160 yuan, DN25 is 50 yuan each, and manual ball valves are replaced every 5 years (16 galvanized ball valves of DN25, 50×16 / 5=160 yuan, 8 galvanized ball valves of DN50, 160×8 / 5=256 yuan), directly Maintenance cost 2012 yuan (70×2+55×2+180×2+650+(160+50)×8 / 5+160+256=2012)

[0010] 6) The maintenance of the existing decanter control system is inconvenient: it takes 30 minutes to replace a DN50 exhaust solenoid valve, 20 minutes to DN25, and 1-2 hours to maintain an air compressor

[0011] 7) The decanting water quality of the existing decanter is highly dependent on the air compressor system: since there is no monitoring system in the control room of the air compressor system, and there is no fault prompt, once the air compressor system has a problem, if it is not found in time, it will be It will cause sludge to enter the decanter, and the effluent will be muddy, which will affect the quality of the effluent

[0012] 8) The existing decanter must manually close the drain valve when there is a sudden power failure: if there is a sudden power failure, if the decanter valve is not closed in time, the decanter will automatically drain to the lowest liquid level, which will affect the operation of the next cycle

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