Vapor-liquid two-phase flow simulation system and simulation method for shell-and-tube steam generator

Abstract

The invention discloses a vapor-liquid two-phase flow simulating system for a tube shell type vapor generator. The system comprises an open loop wind path system and a closed loop water path system. The open loop wind path system comprises a variable frequency fan, a flowmeter, an electric heating box, an evaporator in a simulating device and tail gas treatment equipment, and the variable frequency fan, the flowmeter, the electric heating box, the evaporator and the tail gas treatment equipment are connected in sequence through heat exchange pipes. According to the closed loop water path system, a closed loop is formed by sequentially connecting a high-temperature circulator, a condenser in the simulating device, a thermocouple and a cooling device through a circulating water pipe in the water flow direction. The invention further discloses a method for simulating tube shell type vapor generator vapor-liquid two-phase flow through the vapor-liquid two-phase flow simulating system for the tube shell type vapor generator. The vapor-liquid two-phase flow simulating system and simulating method for the tube shell type vapor generator provide convenience for studying the vapor-liquid two-phase flow mechanism of the tube shell type vapor generator.

Description

technical field [0001] The invention belongs to the technical field of flue gas waste heat utilization equipment and methods, and in particular relates to a vapor-liquid two-phase flow simulation system and simulation method for a shell-and-tube steam generator. Background technique [0002] As an important technical means of waste heat recovery, the shell and tube steam generator has been widely used all over the world. For example: metallurgical furnaces, heating furnaces, industrial kilns, fuel gasification devices, etc., all have a large demand for waste heat utilization, but the shell-and-tube steam generator plays an extremely important role. However, due to the high temperature of high-temperature flue gas in the tube side of the waste heat steam boiler and the large flow rate, the high-temperature gas directly scours the weld seam between the heat exchange tube and the tube sheet, which will easily lead to high-temperature oxidation and cracking and leakage at the co...

AI Technical Summary

Problems solved by technology

[0004] For the complex trajectory characteristics and phase transition characteristics of shell-and-tube steam generators, the current pipe flow numerical simulation software commonly used in related industries cannot achieve accurate simulations. Only physical simulation methods can be used.

[0005] The literature survey results show that a large number of physical simulations of gas-liquid two-phase flow currently use opaque or atmospheric cold test devices, which cannot truly simulate and accurately measure the complex gas-liquid two-phase flow characteristics similar to shell-and-tube steam generators.

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