A hydrogen fluoride unloading system without leakage

Abstract

The utility model discloses a kind of hydrogen fluoride leakless unloading systems, including buffer tank, hydrogen fluoride storage tank, tank car, diaphragm metering pump and recovery system;The nitrogen pipeline is connected to the top of the buffer tank, and the second remote cut-off valve is equipped on the nitrogen pipeline;Buffer tank is connected to the top of hydrogen fluoride storage tank by pipeline, and the first remote cut-off valve is equipped on pipeline;Buffer tank top is also connected to diaphragm compressor inlet by pipeline, and diaphragm compressor outlet pipeline is connected to tank car import pipeline, and the third remote cut-off valve is equipped on import pipeline;The front tee joint of third remote cut-off valve is connected with recovery pipeline, and recovery pipeline is connected to recovery system, and the fifth remote cut-off valve is also connected on recovery pipeline;The outlet pipeline is also connected on the tank car, and outlet pipeline is inserted into hydrogen fluoride storage tank, and the fourth remote cut-off valve is equipped on pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of chemical production technology, specifically relating to a hydrogen fluoride leak-free unloading system. Background Technology

[0002] In the fluorochemical production process, a large amount of anhydrous hydrogen fluoride is required as a raw material. However, anhydrous hydrogen fluoride is a colorless, toxic gas with an irritating odor at room temperature and pressure, and it readily absorbs water to form the strong acid hydrofluoric acid. Therefore, it is crucial to ensure the safety and stability of the unloading process. To address this, a leak-free hydrogen fluoride unloading system was designed to guarantee safety during the unloading process. Utility Model Content

[0003] This invention provides a hydrogen fluoride leak-free unloading system, which aims to improve safety during the unloading process.

[0004] Therefore, the present invention adopts the following technical solution:

[0005] A leak-free hydrogen fluoride unloading system includes a buffer tank, a hydrogen fluoride storage tank, a tank truck, a diaphragm metering pump, and a recovery system;

[0006] The top of the buffer tank is connected to a nitrogen pipeline, and a second remote shut-off valve is installed on the nitrogen pipeline; the buffer tank is connected to the top of the hydrogen fluoride storage tank via a pipeline, and a first remote shut-off valve is installed on the pipeline; the top of the buffer tank is also connected to the inlet of the diaphragm compressor via a pipeline, the outlet pipeline of the diaphragm compressor is connected to the inlet pipeline of the tank truck, and a third remote shut-off valve is installed on the inlet pipeline; the front end tee of the third remote shut-off valve is connected to a recovery pipeline, the recovery pipeline is connected to the recovery system, and a fifth remote shut-off valve is also connected to the recovery pipeline;

[0007] The tanker is also connected to an outlet pipeline that extends into the hydrogen fluoride storage tank and is equipped with a fourth remote shut-off valve.

[0008] Furthermore, the hydrogen fluoride storage tank is also equipped with a remote pressure gauge.

[0009] Furthermore, a weighing module is installed at the bottom of the hydrogen fluoride storage tank to measure the weight of the hydrogen fluoride storage tank.

[0010] The beneficial effects of this invention are as follows: during the unloading process of anhydrous hydrogen fluoride, it can effectively ensure the safety of hydrogen fluoride without leakage, guarantee the safety of operators, and ensure the efficiency and stability of unloading through the DCS automatic control system. Attached Figure Description

[0011] Figure 1 This is a system schematic diagram of this utility model;

[0012] In the diagram: 1-Weighing module, 2-Hydrogen fluoride storage tank, 3-Remote pressure gauge, 4-First remote shut-off valve, 5-Buffer tank, 6-Second remote shut-off valve, 7-Diaphragm compressor, 8-Third remote shut-off valve, 9-Fourth remote shut-off valve, 10-Tank truck, 12-Inlet pipeline, 13-Outlet pipeline, 14-Fifth remote shut-off valve. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0014] like Figure 1 As shown, a leak-free hydrogen fluoride unloading system is described. When the tanker truck 10 carrying hydrogen fluoride is unloading, the unloading pipe 12 and the outlet pipe 13 are connected to the top of the tanker truck 10. After the pipe connection is completed, personnel are evacuated from the site to ensure personnel safety. The DCS then begins the unloading process.

[0015] The specific operation is as follows: The DCS system remotely closes the second remote shut-off valve 6, and opens the first remote shut-off valve 4, the third remote shut-off valve 8, and the fourth remote shut-off valve 9. Then, the diaphragm compressor 7 is started. The hydrogen fluoride gas in the upper part of the hydrogen fluoride storage tank 2 enters the buffer tank 5 through the pipeline. After being pressurized by the diaphragm compressor 7, it enters the tank truck 10. By pressurizing the tank truck 10, the liquid hydrogen fluoride is transported to the hydrogen fluoride storage tank 2. The parameters of the weighing module 1 and the remote pressure gauge 3 at the bottom of the hydrogen fluoride storage tank 2 begin to change. When the pressure and weight exceed "0.1 MPa ≤ pressure ≤ 1 MPa or 3t ≤ weight ≤ 20t", it indicates that unloading is complete and the DCS begins the recovery process.

[0016] The specific procedure is as follows: The DCS opens the second remote shut-off valve 6 on the nitrogen pipeline, closes the first remote shut-off valve 4, the third remote shut-off valve 8, and the fourth remote shut-off valve 9, and stops unloading; the fifth remote shut-off valve 14 is opened, and the residual hydrogen fluoride gas in the pipeline is purged to the recovery system using nitrogen. After the entire recovery process runs for 15 minutes, the DCS remotely shuts off the diaphragm compressor 7, and closes the second remote shut-off valve 6 and the fifth remote shut-off valve 14. The hydrogen fluoride unloading process is completed, and the tanker truck 10 drives away.

Claims

1. A leak-free hydrogen fluoride unloading system, characterized in that, Includes a buffer tank (5), a hydrogen fluoride storage tank (2), a tank truck (10), a diaphragm metering pump, and a recovery system; The top of the buffer tank (5) is connected to a nitrogen pipeline, and a second remote shut-off valve (6) is provided on the nitrogen pipeline; the buffer tank (5) is connected to the top of the hydrogen fluoride storage tank (2) through a pipeline, and a first remote shut-off valve (4) is provided on the pipeline; the top of the buffer tank (5) is also connected to the inlet of the diaphragm compressor (7) through a pipeline, and the outlet pipeline of the diaphragm compressor (7) is connected to the inlet pipeline (12) of the tank truck (10), and a third remote shut-off valve (8) is provided on the inlet pipeline (12); the front end of the third remote shut-off valve (8) is connected to a recovery pipeline, and the recovery pipeline is connected to the recovery system, and a fifth remote shut-off valve (14) is also connected to the recovery pipeline. The tanker (10) is also connected to an outlet pipeline that extends into the hydrogen fluoride storage tank (2) and is equipped with a fourth remote shut-off valve (9).

2. The hydrogen fluoride leak-free unloading system according to claim 1, characterized in that, The hydrogen fluoride storage tank (2) is also equipped with a remote pressure gauge (3).

3. The hydrogen fluoride leak-free unloading system according to claim 1, characterized in that, The bottom of the hydrogen fluoride storage tank (2) is equipped with a weighing module (1) for measuring the weight of the hydrogen fluoride storage tank (2).

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