Introduction of several common sewage treatment processes SBR sewage treatment process

he nitrogen circulation blower ordered by Xinjiang Korla Tarim Oilfield Petrochemical Branch. The gas composition contains nitrogen, hydrogen, water vapor, and catalyst dust; the inlet flow rate is 88m³/min, the inlet pressure is 0.65 MPa.A, the inlet temperature is 50°C, and the outlet pressure is 0.75 MPa.A. This blower is the first nitrogen blower manufactured. The air inlet and outlet casing is made of ductile iron QT500, which meets the general acceptance standard of castings and implements GB/T1348-2009 "Nodular Cast Iron". The middle casing is welded with high-quality carbon steel. This blower requires The water pressure test was conducted on the stator of the casing, the pressure was 0.82MPa, the impeller was made of alloy steel made of Q390, the basket-type inlet and outlet bearing seats, and the outlet end adopted a barrier type cooling device developed by the company, which obtained a utility model patent (patent number) : ZL 2019 2 1653934.X). The blower was produced in 2018. The above two photos were taken in September 2020. At present, the blower is stable during on-site use, and the flow and pressure are satisfactory for on-site use.

The exhaust gas turbocharger in the sulfur recovery unit ordered by the Yanan Refinery of Shaanxi Yanchang Petroleum (Group) Co., Ltd., the medium: sulfur exhaust gas, containing a small amount of water vapor, accompanied by a small amount of hydrogen sulfide and part of ammonia, is weakly alkaline. The inlet temperature is 52℃, the inlet flow rate: 9000m³/h, the inlet pressure: 104.3KPa, the outlet pressure: 166.4KPa;

The blower has a horizontally split structure. The stator is divided into upper and lower casings, which are connected by bolts. During maintenance, open the casing and the rotor can be directly taken out of the stator, which is convenient for disassembly and maintenance; taking into account the acid corrosion of sulfur waste gas The casing is welded with stainless steel 316L, and the impeller and the impeller spacer sleeve are also 316L; the lower part of the casing is provided with a drain hole to prevent the medium from storing liquid inside the blower; because the medium inlet temperature is high, the air inlet and outlet The bearing seat adopts air-cooled cooling method, and the radiator is installed between the bearing seat and the casing to block the heat transfer from the axial bearing to ensure that the temperature rise of the bearing is not higher than 25℃, and to extend the life and service cycle of the blower