The Negative Pressure Continuous Pulverized Coal Discharge System Ground Integrated Operating Pump Truck’s Design

In order to keep the CBM well output, avoid the reservoir damage and capacity decrease caused by well workover, develop a highly efficient continuous row snubbing operation pulverized coal operation device is particularly important. This paper combined with the national major science and technology projects: “Grahame demonstration area of coalbed methane Wells and efficient mining technology research ”(no. 2011ZX05062-004) corpus of the project “ Large oil and gas fields and coal bed methane development”, to develop a specially suitable for CBM Wells, high pressure pump, liquid storage, separation and purification system in a body’s comprehensive ground operation pump truck for negative pressure jet pulverized coal system, to satisfy the need of continuous negative pressure snubbing operation of pulverized coal. This paper completed the overall design work pump truck, automotive equipment- liquid purification separation system design, high pressure pump, the vehicle layout design and main performance analysis etc, the main contents include:First of all, the paper analyzed the coalbed methane Wells negative pressure jet pulverized coal operation process, combinating of coalbed methane Wells homework produced fluid composition and coalbed methane well conditions analysis, determined the parameters of negative pressure jet pulverized coal produced fluid treatment device, designed the negative pressure of pulverized coal exhaust process on the ground, given the ground comprehensive operation of the overall structure of the pump truck,and on this basis finished whole scheme design of pump truck.Then, the paper finished the design of Vehicle-mounted liquid purification separation system for the layout and the detailed. With negative pressure jet pulverized coal operation and on the basis of the hydraulic calculation, according to the principle of sedimentation theory and shallow pool, completed the calculation in the design of inclined tube sedimentation tank, according to the return of fluid flow range and separating particle size range, determined the diameter of the cyclone model, designed the scum institutions device, finished purification system’s overall selection.Finally, the paper designed the on-board equipment- high-pressure pump and power transmission system, finished power transmission device’s selection calculation and dynamic matching, finished selection calculation according to the traffic pressure and power requirements of vehicle working pump, chose the chassis, chose the way to full power to take power and completed the Power Take-off selection according to the requirements of the overall arrangement of the truck. Finished my homework the general arrangement of pump truck vehicle design and performance analysis, determine the overall parameters of the vehicle, on the dynamic properties of pump truck and transverse, longitudinal and steering stability performance is calculated, the operation of the pump truck is given the overall design.