Settling Tank Sludge Removal Of Oilfield Jet Pump

Oilfield wastewater settling tank basic principle is the theory of gravity sedimentation, the main sewage suspended solids particles separated from the aqueous phase separation of suspended solids deposition in the bottom of the settling tank to form the tank bottom sludge, the scene needs to be settling tank sludge action tank bottom sludge discharge tank. Sludge suction jet pump technology as a sludge, in a high pressure water jet pump vacuum formed in the pump, the negative pressure is sucked Sludge kinetic energy to convert the pressure of the expansion pipe, which flow with together discharge tank. In this paper, the jet pump mud technology for the study, through numerical simulation methods to explore the structure of the jet pump effect parameter changes on mud, and improve the efficiency of the jet pump mud in the actual production process through laboratory experiments and field experiments.Based on CFD method to study the structural parameters of the jet pump, decontamination performance and other aspects. Through the establishment of a three-dimensional model of the jet pump flow field, while the calculation mesh and boundary conditions set, sand pump jet exhaust phase flow field numerical simulation. The relationship between the pipes and the nozzle section than the diffusion angle diffuser jet pump decontamination factors and performance:According to the simulation results to the jet pump inlet pressure and suction side pressure, diffusion tube inlet and outlet pipes compared to solid indicators, analyzes the cross-section than the diffusion effects of pipe diffusion angle of the jet pump decontamination capability, in considering the pressure and solid compared to the case when the cross-section ratio R obtained was0.54, the diffusion tube diffuser angle of6.5degrees, decontamination best conclusion.Through laboratory experiments shows that when the jet pump nozzle to help select cross-section ratio of0.5for the drainage flow6-8m3/h, the jet pump can achieve the best working condition. By increasing the flow rate can be increased to help drain suction nozzle near the mud so as to achieve better results. For the poor live mud jet pump effect, to be installed by increasing the density of the jet pump to avoid, covering an area of single jet pump must be less than2m2. Pharmacy can be reduced by adjusting the wastewater treatment sludge liquidity or increase red mud auxiliary tank bottom sludge to improve efficiency.Research methods and simulation results in this paper has some guiding significance for the design and operation of sewage sludge settling tank jet pump device.