Selection of water pumps for wastewater treatment in the petroleum industry
In the treatment of petroleum industry wastewater, the selection of water pumps is a crucial link. There are many factors to consider when selecting, including the nature of the wastewater, the requirements of the treatment process, site conditions, economy and reliability. The following are some key selection steps and considerations:
1. Clarify the nature of the wastewater
Chemical composition: Petroleum industry wastewater usually contains a variety of pollutants such as petroleum, volatile phenols, sulfides, etc. These components have high requirements for the material and sealing performance of the water pump.
Physical properties: Such as the temperature, density, viscosity, etc. of the wastewater, these properties will affect the operating efficiency and performance of the water pump.
Solid particle content: Wastewater may contain solid particles, such as particulate matter, sediment, etc. These particles have requirements for the wear resistance and anti-clogging of the water pump.
2. Determine the treatment process requirements
Flow rate: Determine the flow rate of the required water pump based on the production capacity and delivery capacity of the wastewater treatment device. The flow rate should meet the maximum flow demand and take into account the normal flow rate.
Lift: Determine the lift of the required water pump based on the layout and delivery height of the wastewater treatment system. The lift should leave an appropriate margin to cope with changes in actual operation.
Pressure: Consider the pressure requirements of the pump inlet and outlet to ensure that the pump can meet the system pressure requirements.
3. Consider site conditions
Installation location: According to the installation location of the pump (indoor, outdoor), consider the impact of factors such as ambient temperature, relative humidity, and atmospheric pressure on the operation of the pump.
Maintenance space: Ensure that the pump has sufficient maintenance space for daily maintenance and overhaul.
Safety requirements: For hazardous areas such as flammable, explosive, and toxic, a pump that meets the corresponding safety requirements should be selected.
4. Select the type of pump
Corrosion-resistant pump: For wastewater containing corrosive components, a pump made of corrosion-resistant materials should be selected, such as fluoroplastics, ceramics, and fiberglass.
Wear-resistant pump: For wastewater containing solid particles, a pump with good wear resistance should be selected, such as a pump made of high silicon cast iron, duplex stainless steel, etc.
Self-priming pump: For occasions where self-priming ability is required, a rotor pump with self-priming function can be selected.
Centrifugal pump: For general wastewater treatment occasions, centrifugal pumps are a common choice, with the advantages of simple structure, stable operation, and convenient maintenance.
5. Comprehensive evaluation of economy and reliability
Purchase cost: Consider the purchase cost of the water pump, including equipment cost, installation cost, etc.
Operation cost: Evaluate the operation cost of the water pump, including energy consumption, maintenance cost, etc. Selecting a water pump with high efficiency and low energy consumption can reduce the operation cost.
Reliability: Selecting a water pump with high reliability and long service life can reduce the failure rate and downtime and improve the overall efficiency of the wastewater treatment system.
6. Reference standards and specifications
During the selection process, relevant standards and specifications should be referred to, such as API610 (centrifugal pumps for petroleum, petrochemical and natural gas industries), ISO5199 (technical conditions for centrifugal pumps), etc. These standards and specifications provide guidance and basis for the selection of water pumps.
