CN-121997809-A - Method for determining structure of pipeline connecting device and pipeline connecting device

CN121997809ACN 121997809 ACN121997809 ACN 121997809ACN-121997809-A

Abstract

The application belongs to the technical field of uranium enrichment, and particularly relates to a method for determining a pipeline connecting device structure and a pipeline connecting device. The method comprises the steps of obtaining working parameters and a three-dimensional model of a target pipeline connecting device, wherein the working parameters comprise pressure and flow velocity in a pipeline, carrying out numerical simulation by utilizing the working parameters and the three-dimensional model to obtain a particle size and speed distribution cloud picture of the target pipeline connecting device, and determining whether the target pipeline connecting device meets pipeline design requirements according to the particle size and speed distribution cloud picture. The embodiment of the application can deposit solid impurities in the running process, reduce the content of solid sediment in the cascade and delay the descending trend of the separation capability of the cascade system.

Inventors

WAN YU
WANG JINXING
TONG DA
CHEN YONGHAN
WANG ZEMING
WANG PENG
FENG XUEZHI
HUANG YUQUAN
JIN XIAODONG
GUAN CHENGMING

Assignees

中核陕西铀浓缩有限公司

Dates

Publication Date: 20260508
Application Date: 20251231

Claims (10)

1. A method of determining a structure of a pipe connection device, the method comprising: acquiring working parameters and a three-dimensional model of a target pipeline connecting device, wherein the working parameters comprise the pressure and the flow rate in a pipeline; Performing numerical simulation by using the working parameters and the three-dimensional model to obtain a particle size and speed distribution cloud picture of the target pipeline connecting device; And determining whether the target pipeline connecting device meets the pipeline design requirement according to the particle size and the speed distribution cloud picture.
2. The method for determining a pipe connection structure according to claim 1, wherein the performing numerical simulation using the operating parameters and the three-dimensional model specifically comprises: Based on the Euler-Lagrange method, euler method is used to describe the motion of the continuous phase fluid, and Lagrange method is used to describe the motion of the discrete phase particles.
3. The method of determining the structure of a pipe joint according to claim 1, wherein the three-dimensional model is built by lengthening the inlet pipe to ensure that a fully developed gas-solid two-phase condition is achieved, increasing the ratio of 1.2 from the pipe wall to the central region, and encrypting the boundary layer region between the gas-solid phase and the wall.
4. A method of determining a structure of a pipe coupling according to claim 3, wherein the inlet pipe and the outlet pipe are each 1000mm in length.
5. The method of determining a structure of a pipe connection device according to any one of claims 1 to 4, wherein the target pipe connection device is a pipe diameter enlarged section, a 90 degree arc bend, or a T-pipe.
6. The method of determining a pipe connection structure of claim 5, wherein the pipe design requirement is met when the target pipe connection is a T-pipe.
7. A pipe connection device, characterized in that its structure is determined according to the method of determining the structure of a pipe connection device according to any one of claims 1-6.
8. The pipe connection of claim 7, wherein the pipe connection is a T-pipe.
9. The pipe connection of claim 8, wherein the T-pipe has an inlet pipe length of 1000mm, an outlet pipe length of 1065mm, a balance pipe length of 200mm, and a pipe diameter of 65mm.
10. The pipe connection of claim 8, wherein the T-pipe is mounted after a feed filter of a feed system.

Description

Method for determining structure of pipeline connecting device and pipeline connecting device Technical Field The application belongs to the technical field of uranium enrichment, and particularly relates to a method for determining a pipeline connecting device structure and a pipeline connecting device. Background At present, a uranium enrichment factory adopts a feeding mode of low-temperature low-pressure feeding, solid phase UF 6 in a feeding container is sublimated continuously by heating the feeding container, and in the process, non-volatile solid phase particles are connected with UF 6 gas to a cascade system continuously. Although the feeding filter is additionally arranged behind the feeding container to block the entry of solid-phase particles in the raw materials, a small amount of tiny particles still exist, and the tiny particles can continuously enter the next-stage process pipeline and equipment along with the air flow, so that the equipment performance is reduced, the heat exchange efficiency is influenced, even faults and potential safety hazards are caused, meanwhile, the friction and impact of the particles can cause the erosion effect of the inner wall surface of the equipment, and economic loss is caused to enterprises. In the pneumatic conveying system, solid-phase particles collide with the inner wall surface of the pipeline equipment and the particles collide with each other, and at the same time, under the action of gravity, the aggregation or deposition phenomenon of the particles in the pipeline inevitably occurs, and even the gas conveying in the pipeline or the equipment is seriously influenced. Disclosure of Invention The application aims to provide a method for determining the structure of a pipeline connecting device and the pipeline connecting device, which solve the problem that solid-phase particles in raw materials in the prior art affect the transportation of gas in a pipeline or equipment. The technical scheme for realizing the purpose of the application comprises the following steps: a first aspect of an embodiment of the present application provides a method of determining a structure of a pipe connection device, the method comprising: acquiring working parameters and a three-dimensional model of a target pipeline connecting device, wherein the working parameters comprise the pressure and the flow rate in a pipeline; Performing numerical simulation by using the working parameters and the three-dimensional model to obtain a particle size and speed distribution cloud picture of the target pipeline connecting device; And determining whether the target pipeline connecting device meets the pipeline design requirement according to the particle size and the speed distribution cloud picture. Optionally, the performing numerical simulation by using the working parameter and the three-dimensional model specifically includes: Based on the Euler-Lagrange method, euler method is used to describe the motion of the continuous phase fluid, and Lagrange method is used to describe the motion of the discrete phase particles. Optionally, when the three-dimensional model is built, the length of the inlet pipeline is lengthened to ensure that the full development condition of the gas phase and the solid phase is achieved, the proportion factor from the wall surface to the central area of the pipeline is increased by 1.2, and the boundary layer area between the gas phase and the solid phase is encrypted. Optionally, the lengths of the inlet pipeline and the outlet pipeline of the setting phase are 1000mm. Optionally, the target pipeline connecting device is a pipe diameter expansion section, a 90-degree arc-shaped bent pipe or a T-shaped pipe. Optionally, the pipeline design requirement is satisfied when the target pipeline connection device is a T-pipe. A second aspect of the embodiment of the present application provides a pipe connection device, the structure of which is determined according to any one of the methods for determining the structure of a pipe connection device provided in the first aspect of the embodiment of the present application. Optionally, the pipe connection device is a T-pipe. Optionally, the length of the inlet pipeline of the T-shaped pipe is 1000mm, the length of the outlet pipeline is 1065mm, the length of the balance pipeline is 200mm, and the diameter of the pipeline is 65mm. Optionally, the T-tube is mounted after the feed filter of the feed system. The beneficial technical effects of the application are as follows: The embodiment of the application provides a method for determining the structure of a pipeline connecting device and the pipeline connecting device, wherein the method comprises the steps of obtaining working parameters and a three-dimensional model of a target pipeline connecting device; the working parameters comprise pressure and flow velocity in a pipeline, the working parameters and the three-dimensional model are utilized to carry out nume