High-purity phosphorus oxychloride feeding steel cylinder

Abstract

The invention discloses a high-purity phosphorus oxychloride feeding steel cylinder which comprises a steel cylinder body, a nitrogen inlet pipe and a phosphorus oxychloride feeding pipe, a horizontal pipeline and a communicating pipeline, wherein the nitrogen inlet pipe is arranged at the top of the steel cylinder body and provided with a three-way nitrogen inlet valve, the phosphorus oxychloride feeding pipe is arranged at the top of the steel cylinder body and provided with a three-way phosphorus oxychloride feeding valve, two ends of the horizontal pipeline are respectively communicated with the tops of the nitrogen feeding pipe and the phosphorus oxychloride feeding pipe, the horizontal pipeline is provided with a first valve, two ends of the communicating pipeline are respectively communicated with the nitrogen inlet valve and the phosphorus oxychloride feeding valve, the communicating pipeline is provided with a second valve, the bottom end of the phosphorus oxychloride feeding pipe is inserted into the bottom of the steel cylinder body, the horizontal pipeline is positioned above the nitrogen inlet valve and the phosphorus oxychloride feeding valve. The pipeline with the valve is additionally arranged between the nitrogen inlet valve and the phosphorus oxychloride feeding valve, so that the pipeline close to the nitrogen inlet valve and the phosphorus oxychloride feeding valve can be cleanly flushed through the incapability of being flushed, thus avoiding the residue phosphorus oxychloride, keeping the smoothness of the pipeline, and ensuring the running safety of the equipment.

Description

technical field [0001] The invention relates to a high-purity phosphorus oxychloride feed cylinder. Background technique [0002] The structure of existing high-purity phosphorus oxychloride feed cylinder is as follows: figure 1 As shown, it includes a steel cylinder body 1, a nitrogen gas inlet pipe 2 arranged on the top of the steel cylinder body 1, a nitrogen inlet valve 21, and a phosphorus oxychloride supply pipe 2 arranged on the top of the steel cylinder body 1 with a phosphorus oxychloride feed valve 31. Material pipe 3, nitrogen gas inlet pipe 2 communicate with steel cylinder body 1, the bottom end of phosphorus oxychloride feed pipe 3 is inserted into the bottom of steel cylinder body 1, the top of nitrogen gas inlet pipe 2 and the top of phosphorus oxychloride feed pipe 3 pass through The horizontal pipeline 4 with the first valve 41 communicates, and the horizontal pipeline 4 is positioned at the top of the nitrogen inlet valve 21 and the phosphorus oxychloride...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the existing high-purity phosphorus oxychloride feeding steel cylinder is that it can only flush the first valve 41 and the nitrogen inlet pipe 2 and the phosphorus oxychloride feeding pipe 3 are located in the pipeline above the horizontal pipe 4, while the nitrogen inlet valve 21 , phosphorus oxychloride feed valve 31 and the pipelines above these two valves and below the horizontal pipeline 4 cannot be washed away. For a long time, the phosphorus oxychloride in this part of the pipeline will gradually remain and finally cause blockage, making the supply cylinder risk of explosion

Images