變徑式超音速氣液分離器結(jié)構(gòu)設(shè)計(jì)及實(shí)驗(yàn)和模擬研究
[Abstract]:The dehydration of natural gas is an essential link in the production of commercial gas. Its main purpose is to prevent hydrate and liquid water from appearing in the course of subsequent treatment and storage and transportation, and to prevent acid gas from being dissolved in free water to corrode the pipeline and equipment. The supersonic gas-liquid separator is a new type of gas-liquid separation equipment, which has the advantages of low consumption, safety and efficiency and no pollution. It is of great significance to the processing and gathering of natural gas field. But at present the domestic theory research is not mature, not having the commercial use value for the time being. In this paper, the basic principle and design method of supersonic separator are studied. The three dimensional design of Laval nozzle, swirl tube, rotor wing and diffuser tube are carried out by using Solidworks. The contraction section of the Laval nozzle is shaped by a quintic curve, the throat is a straight pipe with a flat angle, the gradual expansion section and the expansion section are designed to be conical, and the rotor wing is a triangular swept wing based on the wing of an aircraft. In addition, when the influence of throat size on the separation efficiency of supersonic separator is studied in the experiment, the installation process of the throat of the separator is cumbersome and time-consuming. Therefore, the variable diameter adjustable structure of throat is designed in this paper. Then, according to the profile structure and flow field characteristics of the variable diameter supersonic separator, the basic model of the separator is simulated and analyzed. The simulation results show that the device has the capability of low temperature refrigeration and can achieve the effect of swirl separation. At the same time, on the basis of the basic structure, the rotor position, the tapered angle of the gradual expansion tube of the Laval nozzle and the back pressure of the supersonic separator outlet are simulated and analyzed respectively. The conclusions are as follows: (1) the closer the rotor is to the outlet of the Laval nozzle, the longer the region of supersonic flow and low temperature behind the rotor is, and the longer the low pressure region is. The higher the gas-liquid separation efficiency is, the (2) the conical angle of the gradual expansion tube of the Laval nozzle affects the flow field characteristics of the separator, and the too large or too small cone angle will make the flow field characteristic in the downstream region worse, thus affecting the separation efficiency of the gas and liquid in the swirl pipe. Especially when the cone angle is too large, strong shock waves are easily produced at the outlet of the Laval nozzle. (3) the exit back pressure affects the position of shock wave in the internal flow channel of the separator. With the increase of the outlet back pressure, the shock wave moves to the upstream of the supersonic separator; The smaller the outlet back pressure, the better the overall flow field characteristics and the higher the gas-liquid separation efficiency in the swirl tube. In this paper, the indoor experimental system of variable diameter supersonic separator is studied, the main contents and methods of installation and debugging are planned, and the measurement instruments are selected. Finally, a detailed experimental scheme and flow chart are worked out.
【學(xué)位授予單位】:西安石油大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:TE96
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