An experimental device and method for simulating multiphase flow in a riser of combustible ice fluidized mining

Abstract

The invention relates to an experiment apparatus and method for simulating combustible ice fluidized mining riser multiphase flow. The experimental apparatus consists of a gas supply system, a combustible ice generating and breaking integration device, a water circulation system, a sand injection device and a separation and recovery system. The combustible ice generating and breaking integration device can be used for condensing natural gas into combustible gas under conditions of high pressure and low temperature and forming ice particles through twice breaking. Sand particles and the ice particles are stirred uniformly through the flow of water in an ice and sand mixing chamber and then flow into a test riser, a high-speed camera is used for monitoring flow patterns and a pressure gage and a thermometer are used for recording real-time variations in pressure and temperature. The separation and recovery system can achieve three-stage separation, sequentially separates and recovers gas, water, ice and sand, and economic and environmental protection effects are gained. The invention adopts a closed recirculation, and is easy to operate and safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of seabed combustible ice mining and transportation, and in particular relates to an experimental device and method for simulating multiphase flow of combustible ice fluidized mining standpipes. Background technique [0002] With the rapid development of my country's economy, energy consumption has increased rapidly. At present, my country's total oil consumption accounts for one-tenth of the world's total oil consumption, becoming the world's largest energy consumer. The issue of energy security is very prominent, so the research and development of new energy has become the current top priority. As a new type of green energy, the development and application of combustible ice has attracted widespread attention from all over the world. [0003] Combustible ice, also known as natural gas hydrate, is a kind of ice-like solid formed by natural gas and water under low temperature and high pressure environment, ...

AI Technical Summary

Problems solved by technology

[0005] However, in the standpipe of solid fluidization mining, combustible ice will undergo a phase change due to changes in pressure and temperature, so that the fluid in the standpipe presents three states of gas, liquid and solid, and the flow becomes very complicated.

At present, there are very few studies on gas-liquid-solid three-phase flow considering phase transitions, and even rarer related experimental devices

Images