Detailed application of vertical long axis suspended semi submersible sump pump in the treatment of printing and dyeing/papermaking wastewater

The vertical long axis suspended semi submersible sump pump, with its core characteristics of corrosion and wear resistance, no shaft seal leakage, and strong anti clogging ability, has become the mainstream choice for transporting high suspended solids and highly corrosive wastewater in the printing and dyeing/papermaking wastewater treatment scene. It covers various transportation needs of the entire process of printing and dyeing/papermaking wastewater treatment. The specific application details are as follows:
Printing and dyeing/papermaking core wastewater transportation scene
·White water circulation and clean water replenishment and transportation: Directly connected to the white water circulation system of the paper machine, extracting white water from the paper machine to complete closed-loop circulation and transportation. At the same time, it serves as a clean water replenishment pump in the production workshop, suitable for the continuous operation of high flow in the paper mill.
·Collection and transportation of printing and dyeing wastewater: Extracting comprehensive printing and dyeing wastewater containing dyes, auxiliaries, and pulp from the wastewater collection tank of the dyeing and washing process of the printing and dyeing production line, suitable for the characteristics of large water quality fluctuations and high suspended solids content.
·Pre treatment unit medium transportation: Transport the wastewater and flocculation agents from pre-treatment units such as air flotation and coagulation sedimentation. The shaft seal design avoids the volatilization and diffusion of volatile additives in printing and dyeing wastewater, ensuring the safety of the workshop working environment.
·Sludge and black liquor transportation: Paper making physicochemical sludge and pulp black liquor are extracted from the bottom of the sludge concentration tank and black liquor collection tank. The impeller with stirring blades can disperse the settled pulp fibers and sludge, avoiding fiber entanglement, sludge deposition, and blockage of the tank body and pipelines.
✅  Industry exclusive adaptation core advantages
·Outstanding corrosion and wear resistance: The overcurrent components of the whole machine are made of industrial grade PP, fluoroplastic lining, or 316L stainless steel material, which can withstand the corrosion of acid and alkali dyes and cooking black liquor in printing and dyeing/papermaking wastewater for a long time. At the same time, it is suitable for abrasion scenarios of pulp fibers and small filler particles.
·Leak free safety guarantee: The shaft seal free design eliminates the leakage of printing and dyeing paper wastewater containing dyes and additives from the root, avoiding the pollution of workshop environment by colored wastewater leakage, and meeting industry environmental compliance requirements.
·Strong anti clogging ability: The open large channel impeller design ensures smooth flow and can smoothly pass through short pulp fibers and small suspended solids in wastewater, without fiber entanglement or blockage, suitable for the transportation needs of papermaking white water and printing and dyeing pulp wastewater.
·Easy installation and maintenance: The vertical structure is directly installed on the top of the wastewater tank, with a compact structure and small footprint. There is no need to build an underground pump room, which greatly reduces civil engineering investment. The rotor can be extracted for maintenance without dismantling pipelines, greatly reducing the difficulty of maintenance under high suspended solids conditions.
Key points for industry selection
·When transporting papermaking wastewater containing high concentration cooking black liquor, it is preferred to use corrosion-resistant and wear-resistant fluoroplastic alloy overcurrent components to avoid the strong alkaline medium in the black liquor corroding the pump body.
·When the medium contains a large amount of long pulp fibers, an open type unobstructed impeller must be selected, and the guide bearing must be matched with an external clean cooling water lubrication system to avoid fiber entanglement and bearing wear.
·When the underwater depth exceeds 3 meters, intermediate support guide bearings must be installed according to specifications to ensure smooth operation of the long shaft and meet the production requirements of 7 × 24-hour continuous operation in the paper industry.
At present, the vertical long axis suspended semi submersible sump pump, which is suitable for the treatment of printing and dyeing/papermaking wastewater, has a mainstream flow rate coverage of 85-5600m ³/h and a head of 10-100m. There have been a large number of mature implementation cases, fully meeting the strict requirements of various complex wastewater transportation in the printing and dyeing and papermaking industry.