Premixing device capable of mixing natural gas drag reducers step by step

Abstract

The invention discloses a premixing device capable of mixing natural gas drag reducers step by step. The premixing device comprises a shell, the shell is of a cylindrical structure. A natural gas inlet is formed in one end of the shell; an atomized drag reducer outlet is formed in the center of the other end of the shell; a first jet flow nozzle, a second jet flow nozzle, a third jet flow nozzle and a spiral blade are sequentially arranged in the shell from one end of the natural gas inlet along the axis of the shell; the natural gas inlet communicates with the first jet nozzle; a first drag reducer inlet pipe is centripetally arranged between the first jet flow spray head and the second jet flow spray head along the circumference of the shell, a second drag reducer inlet pipe is centripetally arranged between the second jet flow spray head and the third jet flow spray head along the circumference of the shell, and a third drag reducer inlet pipe is centripetally arranged between the third jet flow spray head and the spiral blade along the circumference of the shell. According to the invention, the natural gas and the drag reducer can be uniformly mixed through the mutual combination of step-by-step jet mixing, throttling, spiral flowing and the like.

Description

technical field [0001] The invention belongs to the technical field of gas-liquid mixing, in particular to a premixing device for gradually mixing natural gas drag reducer. Background technique [0002] For long-distance natural gas pipelines, the pressure loss of gas in the pipeline is an important issue. When the gas is in the turbulent region, especially the high Reynolds number region, due to the existence of turbulence and other irregular motions, the pressure loss caused by the gas energy loss is much larger, and the roughness of the tube wall is the main reason for the eddy flow. Therefore, reducing the pressure loss by reducing the roughness of the gas pipeline has become the main means to increase the gas flow. [0003] Pipeline inner coating drag reduction technology is generally used at home and abroad to reduce pipe wall roughness, but the construction equipment of pipeline inner coating drag reduction technology is complex and expensive, and the drag reduction ...

AI Technical Summary

Problems solved by technology

[0003] Pipeline inner coating drag reduction technology is generally used at home and abroad to reduce pipe wall roughness, but the construction equipment of pipeline inner coating drag reduction technology is complex and expensive, and the drag reduction effect gradually decreases or even decreases as time goes by due to the continuous peeling off of the inner coating. Produce negative effects, and at the same time, the original non-coated pipeline cannot be implemented due to construction costs and other issues

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