有色设备

The leachate from waste incineration projects is characterized by complex composition, high salinity, high pollutant concentration, and strong corrosiveness, making the stable operation of its lifting system meet a persistent challenge in design and maintenance. At present, the commonly used leachate lifting devices in garbage incineration projects include submersible leachate lifting devices and self-priming leachate lifting devices. For submersible leachate lifting devices, the main equipment is submerged in the leachate during operation. By improving the material of the submersible sewage pump, it is impossible to avoid the corrosion of the lifting device by garbage leachate, and the difficulties in operation cannot be completely solved. The paper proposes an improved leachate lifting system incorporating an automatic water replenishment device for self-priming pumps, a water replenishment pipeline and solenoid valve are added to the self-priming pump storage chamber, after receiving the pump signal, the system firstly monitors the water level in the storage chamber through a liquid level device and ensures that the storage chamber is automatically replenished to full water, which effectively addresses the unstable startup issue of the pumps, significantly reduces maintenance frequency during operation, and greatly enhances system reliability. In actual project operation, maintenance and repair are only carried out during the major overhaul of the entire plant, mainly for the replacement of the leachate suction pipe, and the replacement cycle of the self-priming pump is greater than 2 years. The overall maintenance and repair frequency is reduced to once a year.