CN-121977165-A - Drainage system and method for liquid high-boiling-point volatile fluoride

CN121977165ACN 121977165 ACN121977165 ACN 121977165ACN-121977165-A

Abstract

The application belongs to the technical field of safety, and relates to a drainage system and a drainage method for liquid high-boiling-point volatile fluoride. The application provides a drainage and split charging system and a method thereof applicable to liquid high-boiling point volatile fluoride, wherein the drainage and split charging system comprises a liquefaction container, a product container, a sampling container, a split charging pipeline and a sampling pipeline; on the premise of not changing the existing production unit factory building system, the stable liquid phase state of the liquid fluoride in the split charging and sampling process can be ensured by improving the split charging method, namely by reducing the pressure dip of the liquid fluoride in the split charging and drainage process and carrying out the method of filling the liquid fluoride section by section on the drainage pipeline, so that the gasification phenomenon of the liquid fluoride in the split charging and sampling process is reduced, and the intrinsic safety of the liquid high-boiling-point volatile fluoride in the split charging and sampling process is improved.

Inventors

XU SHIKUN
HE YUHUA
YU CHANGYI
ZHANG QUANQUAN
YANG JIANHUI
LIU SHAOSONG
HUANG ZHONGGUO
FU SHAOLIANG
LI ZHUN
Pan Wanting
YUAN WEI

Assignees

四川红华实业有限公司

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (10)

1. A drainage system for liquid high boiling point volatile fluoride comprising: A liquefaction container (26), a product container (27), a sampling container, a packaging line and a sampling line; the split charging pipeline comprises a first valve (1) to a fifth valve (5), a first pipeline (15) to a fourth pipeline (18); The sampling pipeline comprises a first valve (1), a second valve (2), a fourth valve (4), a fifth valve (5), and sixth to fourteenth valves (6) to (14), fourth and fifth to eleventh pipelines (18, 19) to (25); The liquefying container (26) is sequentially communicated with a first pipeline (15), a second valve (2), a second pipeline (16), a third valve (3), a third pipeline (17), a fourth valve (4), a fourth pipeline (18) and a fifth valve (5) through a first valve (1) to form a split charging pipeline, and the tail end of the fourth pipeline (18) is connected with the product container (27); One end of the sampling pipeline is connected with the split charging pipeline through a second valve (2), the other end of the sampling pipeline is connected with the sampling container through a fifth valve (5), sixth valves (6) to fourteenth valves (14) and corresponding fifth pipelines (19) to eleventh pipelines (25) are sequentially arranged along the sampling pipeline, each pipeline is divided into independent pipeline sections by adjacent valves, the eleventh pipeline (25) is connected with the fourth valve (4), and the rear end of the eleventh pipeline is connected with the product container (27); The tenth valve (10) is connected to an eighth conduit (22) of the sampling line for collecting the sample.
2. A drainage system for liquid high boiling point volatile fluorides according to claim 1, further comprising an electronic scale for weighing the product container (27).
3. The drainage method of the liquid high-boiling-point volatile fluoride is characterized by comprising the following steps of: s1, heating fluoride to be liquid in a liquefaction container (26) and keeping homogeneous; S2, in the drainage sub-packaging stage, closing a sampling pipeline valve to enable sub-packaging pipelines to be in an independent state; S3, carrying out sectional filling on each pipe section according to the sequence of a plurality of pipe sections formed by adjacent valves in the split charging pipeline; s4, opening a fifth valve (5) to enable the liquid fluoride to enter a product container (27) to finish primary split charging; S5, closing a valve corresponding to the sub-packaging pipeline when the product container (27) contains the product and reaches a certain weight in the sub-packaging period, so that the sampling pipeline is in an independent state; s6, carrying out sectional filling on each pipe section according to the sequence of a plurality of pipe sections formed by adjacent valves in the sampling pipeline; S7, opening a valve to collect fluoride into a product container (27), and opening a tenth valve (10) to split and charge the liquid fluoride into a sampling container to finish sampling after the collecting process is stable; And S8, after the sampling is finished, closing a valve of a sampling pipeline, recovering residual fluoride in the sampling pipeline, restarting a sub-packaging pipeline, and continuously completing final sub-packaging.
4. A method for draining liquid high boiling point volatile fluoride according to claim 3, wherein said step S3 of filling each tube segment in segments comprises: the first pipeline (15), the second pipeline (16), the third pipeline (17) and the fourth pipeline (18) are sequentially filled with liquid fluoride, and the filling time of the liquid fluoride is controlled according to 5s, 7s, 10s and 5s respectively so as to avoid the gasification of the liquid fluoride caused by the sudden pressure drop of each pipeline.
5. The method for conducting liquid high boiling point volatile fluoride according to claim 4, wherein said step S6 of filling each tube segment in segments comprises: The fifth pipeline (19), the sixth pipeline (20), the seventh pipeline (21), the eighth pipeline (22), the ninth pipeline (23), the tenth pipeline (24) and the eleventh pipeline (25) are sequentially filled with liquid fluoride, wherein the filling time of each section of material is respectively controlled to be 5s, 3s, 4s, 3s and 7s.
6. The method of claim 5, wherein the opening of each segment of pipeline is performed in a slow-open manner during the segment filling process to reduce the instantaneous pressure difference.
7. The method of claim 6, wherein the predetermined filling time is ensured before the next valve of any pipe is opened, so as to ensure that the liquid fluoride in the pipe is completely filled.
8. The method for conducting liquid high boiling point volatile fluoride according to claim 7, wherein the vacuum characteristic of said pipeline is kept unchanged by the whole system during the stage conduction, and the pressure drop is reduced only by stage control.
9. The method for conducting liquid high-boiling point volatile fluoride according to claim 8, wherein the method is based on the physical characteristic that the fluoride triple point pressure p=150 kPa, and the transition from liquid to gas is avoided by avoiding the front fluoride from dropping below the triple point during conducting.
10. The method for conducting liquid high-boiling point volatile fluoride according to claim 9, wherein the liquid fluoride is judged whether to gasify by monitoring the weight change of the material of the electronic scale of the product container (27), and if the weight increasing trend is continuous, the phenomenon of gasifies is not generated.

Description

Drainage system and method for liquid high-boiling-point volatile fluoride Technical Field The application belongs to the technical field of safety, and relates to a drainage system and a drainage method for liquid high-boiling-point volatile fluoride. Background At present, the existing form of fluoride in production units in China mainly takes gas and solid state as main materials, and the fluoride is liquid fluoride only during drainage and split charging, so that risks exist in sampling links and pouring process links of liquid fluoride plants in production units in China. The working environment of the production factory is 'high Wen Zhengya', and fluoride is heated and liquefied in the working environment. In the split charging and sampling process, the split charging and drainage pipeline of the traditional production unit is longer, the inside of the split charging and drainage pipeline is almost close to a vacuum environment, and the drainage process is realized by utilizing the action of the height pressure difference. At present, the traditional split charging drainage method of the production unit can generate the phenomenon of gasification of liquid fluoride, so that potential safety hazard is increased, fluoride leakage can be caused during fault elimination, and safety risk is improved. Disclosure of Invention The application aims to design a drainage system and a drainage method for liquid high-boiling-point volatile fluoride, and provides a safe and efficient drainage and split charging system and method suitable for production units according to split charging and drainage steps and split charging and drainage pipeline and valve layout and combining physical characteristics of fluoride. The technical scheme for realizing the purpose of the application is as follows: a drainage system for liquid high boiling point volatile fluoride comprising: a liquefaction container, a product container, a sampling container, a split charging pipeline and a sampling pipeline; The split charging pipeline comprises a first valve, a fifth valve, a first pipeline, a second pipeline and a fourth pipeline; the sampling line includes: a first valve, a second valve, a fourth valve, a fifth valve, and sixth to fourteenth valves, fourth and fifth to eleventh pipes; The liquefaction container is sequentially communicated with a first pipeline, a second valve, a second pipeline, a third valve, a third pipeline, a fourth valve, a fourth pipeline and a fifth valve through a first valve to form a split charging pipeline, and the tail end of the fourth pipeline is connected with the product container; The sampling pipeline is sequentially provided with a sixth valve, a fourteenth valve, a corresponding fifth pipeline and an eleventh pipeline along the way, each pipeline is partitioned by adjacent valves to form an independent pipeline section, the eleventh pipeline is connected with a fourth valve, and the rear end of the sampling pipeline is connected with a product container; The tenth valve is connected to the eighth pipe of the sampling pipe for collecting the sample. Optionally, an electronic scale is also included for weighing the product container. A method for draining liquid high-boiling point volatile fluoride, comprising the following steps: s1, heating fluoride to be liquid in a liquefaction container and keeping homogeneous; S2, in the drainage sub-packaging stage, closing a sampling pipeline valve to enable sub-packaging pipelines to be in an independent state; S3, carrying out sectional filling on each pipe section according to the sequence of a plurality of pipe sections formed by adjacent valves in the split charging pipeline; S4, opening a fifth valve to enable the liquid fluoride to enter a product container to finish primary split charging; S5, closing a valve corresponding to the sub-packaging pipeline when the product container contains the product and reaches a certain weight in the sub-packaging period, so that the sampling pipeline is in an independent state; s6, carrying out sectional filling on each pipe section according to the sequence of a plurality of pipe sections formed by adjacent valves in the sampling pipeline; s7, opening a valve to collect the fluoride into a product container, and opening a tenth valve to split and charge the liquid fluoride into a sampling container to finish sampling after the collecting process is stable; And S8, after the sampling is finished, closing a valve of a sampling pipeline, recovering residual fluoride in the sampling pipeline, restarting a sub-packaging pipeline, and continuously completing final sub-packaging. Optionally, the step S3 of filling each pipe section in segments includes: The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are sequentially filled with liquid fluoride, and the material filling time is controlled according to 5s, 7s, 10s and 5s respectively so as to avoid the gasification of the liquid fluorid