Sulfur deposition testing device for sulfur-containing natural gas gathering and transportation pipeline

Abstract

The invention discloses a sulfur deposition testing device for a sulfur-containing natural gas gathering and transportation pipeline. The sulfur deposition testing device comprises a supply system, a sulfur deposition testing system, a data image acquisition system and a tail gas recovery system. The device has the beneficial effects that the device can realize accurate control of the concentration of sulfur particles, simulate the real deposition condition of the sulfur particles in a natural gas gathering and transportation pipeline, and particularly can analyze the influence of variables such as pressure, gas flow, sulfur particle size, sulfur particle flow, valve opening and curve ratio on the sulfur deposition rule in a reverse Z-shaped vertical pipe, a horizontal bent pipe and a valve which are easy to generate a sulfur deposition phenomenon, and greatly improves the measurement precision of the critical suspension speed, the deposition rate and the accumulative deposition rate of sulfur particles; the pressure and flow change of the test section can be monitored in real time through the data image acquisition system, the dynamic change image data of sulfur deposition in the pipeline can be recorded in real time, and the device has the advantages of high measurement precision, visual experiment result, good safety performance and the like.

Description

technical field [0001] The invention belongs to the technical field of oil and gas pipelines, and in particular relates to a sulfur deposition testing device for a gathering and transportation pipeline of sour natural gas. Background technique [0002] my country is rich in high-sulfur gas reservoir resources, mainly distributed in western regions such as Changqing, Chongqing, and Sichuan, with cumulative proven reserves as high as 1×10 12 m 3 , great development potential. In high-sulfur gas reservoirs, elemental sulfur exists stably in natural gas in the form of physical dissolution and chemical dissolution in high-temperature and high-pressure environments. However, after the high-sulfur natural gas flows into the surface gathering and transportation pipeline system with the wellbore, the pressure and temperature decrease. When the elemental sulfur concentration is higher than the solubility of sulfur in natural gas, sulfur molecules precipitate, grow and coalesce to fo...

AI Technical Summary

Problems solved by technology

[0003] At present, in the disclosed sulfur deposition measurement device: the device (CN109060616) can carry out the sulfur deposition experiment in the wellbore, but it cannot accurately control the concentration of sulfur particles, and when the magnetic levitation balance is used to measure the sulfur deposition in the pipeline, the simultaneous measurement of the wellbore itself and The scheme of the weight of sulfur deposition, due to the heavy weight of the wellbore itself, cannot accurately measure the critical suspension velocity, deposition rate, and cumulative deposition amount of sulfur particles in the wellbore when the sulfur particles are deposited in a small amount; the device (CN110108444) can carry out sulfur deposition experiments in pipelines , the gas source uses on-site high-sulfur gas, which cannot control the concentration of sulfur particles. Sampling and weighing are used for sulfur deposition, which has a large human error, and it is impossible to realize the dynamic observation of the sulfur deposition process in the pipeline.

Therefore, the existing sulfur deposition test device is mainly limited by the following aspects, so that it cannot truly reflect the deposition law of sulfur particles in the pipeline: (1) precise control of the concentration of sulfur particles; (2) critical suspension velocity of sulfur particles, deposition Accurate measurement of rate and cumulative deposition; (3) Dynamic observation of sulfur deposition process

In addition, in sour natural gas gathering and transportation pipelines, sulfur deposits are mainly deposited at throttle valves and bends of pipe fittings. Currently, there is no device to measure sulfur deposits at the above two places.

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