Gas-liquid phase system capable of avoiding leakage and leakage

Abstract

The utility model discloses a gas-liquid phase system capable of avoiding leakage and leakage, and belongs to the technical field of chemical equipment. According to the technical scheme, the device comprises a reactor, a reflux tower and a controller, a gas-phase pipeline and a liquid-phase pipeline are arranged between the reactor and the reflux tower, each of the gas-phase pipeline and the liquid-phase pipeline comprises an inner pipeline and a leakage-proof jacket, the leakage-proof jackets wrap the outer sides of the inner pipelines and are fixedly connected with the inner pipelines, flanges are arranged at the two ends of the inner pipelines, and the inner pipelines are connected with the controller. Two ends of the inner pipeline are respectively connected with the reactor and the reflux tower through flanges, the leakage-proof jacket is provided with a pressure tapping, the pressure tapping is connected with a pressure tapping pipeline, the pressure tapping pipeline is provided with a root valve and a pressure sensor, the pressure sensor is provided with an alarm module, and the pressure sensor is electrically connected with the controller. According to the utility model, corrosion and leakage of the pipeline can be found in time, and gas-liquid phase materials can be prevented from leaking and leaking.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and in particular relates to a gas-liquid phase system which can avoid leakage. Background Art

[0002] In industrial production, liquid phase fluorination is a commonly used method for preparing fluorine-containing compounds. It refers to the process of fluorinating organic or inorganic substances using a fluorinating agent under liquid conditions. The principle is mainly to use a catalyst and anhydrous hydrogen fluoride to react in the liquid phase. The fluorine atoms in the fluorinating agent replace other atoms or groups in the organic or inorganic molecules to form fluorides. The liquid phase fluorination method plays an important role in the synthesis of organic fluorine compounds, such as the production of R22 and R32. The method has the advantages of low reaction temperature, simple operation and high production capacity, which can meet the needs of large-scale production. However, the strong acidic medium generated by the catalyst and anhydrous hydrogen fluoride is easily entrained by the product flow into the subsequent connecting pipelines, which is easy to cause corrosion and leakage. In order to avoid corrosion and leakage of pipelines, steel-lined fluorine and steel-lined alloy pipelines are usually used in industrial production. However, the lining of steel-lined fluorine pipelines is prone to bulging under high pressure conditions, affecting the flow rate of gas and liquid materials. At the same time, the prices of steel-lined fluorine and steel-lined alloy pipelines are relatively high, and corrosion problems are inevitable during long-term use. Once corrosion and leakage occur in the pipeline, a large amount of hydrogen fluoride and organic matter will escape, which can easily cause personal injury and environmental pollution. Utility Model Content

[0003] The utility model provides a gas-liquid phase system which can avoid leakage, which can timely discover pipeline corrosion leakage and avoid leakage of gas-liquid phase materials.

[0004] The technical solution of the utility model is:

[0005] A gas-liquid phase system for avoiding leakage comprises a reactor, a reflux tower and a controller. A gas phase pipeline and a liquid phase pipeline are arranged between the reactor and the reflux tower. The gas phase pipeline and the liquid phase pipeline both comprise an inner pipeline and a leakproof jacket. The leakproof jacket is wrapped around the outer side of the inner pipeline. The leakproof jacket is fixedly connected to the inner pipeline. Flanges are arranged at both ends of the inner pipeline. The two ends of the inner pipeline are respectively connected to the reactor and the reflux tower through the flanges. The leakproof jacket is provided with a pressure tapping port, which is connected to the pressure tapping pipeline. The pressure tapping pipeline is provided with a root valve and a pressure sensor. The pressure sensor is provided with an alarm module. The pressure sensor is electrically connected to the controller. Under normal circumstances, the pressure tapping pipeline responds to the pressure value through the root valve and the pressure sensor. Under abnormal circumstances, it serves as a evacuation pipeline for emptying the material in the leakproof jacket.

[0006] Preferably, the reactor is a liquid phase fluorination reactor.

[0007] Preferably, the leak-proof jacket is welded to the inner pipeline.

[0008] Preferably, the outer diameter of the leak-proof jacket is 1.1-1.3 times the outer diameter of the inner pipeline.

[0009] Preferably, the inner pipeline and the leak-proof jacket are both made of stainless steel, the inner pipeline material is preferably S31603, and the leak-proof jacket material is preferably S30408.

[0010] Preferably, the alarm pressure of the alarm module is set to 50-100 kPa.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. After the utility model is put into use, if the pipeline corrodes and leaks, the material enters the jacket, and the pressure rises suddenly, the operator can find the abnormality at the first time through the pressure alarm, and respond in time after confirmation, and perform emergency treatment on the production equipment within the response time, thus preventing the leakage of toxic and harmful materials in the on-site operating environment. In addition, the manufacturing cost of the pipeline is reduced by adopting the utility model technology, and the safety benefits, environmental benefits, and economic benefits are well reflected.

[0013] 2. The utility model effectively avoids the leakage problems that may occur in traditional gas-liquid phase systems by designing a structure including an inner pipeline and a leak-proof jacket. The leak-proof jacket is tightly wrapped around the outer side of the inner pipeline and connected to the reactor and the reflux tower through a flange, which enhances the sealing performance of the system and reduces the risk of leakage.

[0014] 3. The pressure-taking port and pressure-taking pipeline set on the leak-proof jacket of the utility model, in conjunction with the root valve and pressure sensor, realize real-time monitoring of the internal pressure of the system. Once the system pressure is abnormal and reaches the preset alarm pressure range (50-100kPa), the alarm module will start immediately and send a signal to the controller, so that potential safety hazards can be discovered and handled in time to avoid accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a gas-liquid phase system for preventing leakage of the utility model.

[0016] Figure 2 The utility model is a structural schematic diagram of an inner pipeline, a leak-proof jacket, a flange, a pressure-taking port, a valve at the root of the pressure-taking pipeline and a pressure sensor.

[0017] In the figure, 1, inner pipeline; 2, leak-proof jacket; 201, pressure port; 202, pressure pipeline; 3, flange; 4, root valve; 5, pressure sensor; 6, reactor; 7, reflux tower; 8, gas phase pipeline; 9, liquid phase pipeline. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] Example 1

[0020] like Figure 1 and Figure 2 As shown, the gas-liquid phase system for avoiding leakage comprises a reactor 6, a reflux tower 7 and a controller. The reactor 6 is a liquid phase fluorination reactor. A gas phase pipeline 8 and a liquid phase pipeline 9 are arranged between the reactor 6 and the reflux tower 7. The gas phase pipeline 8 and the liquid phase pipeline 9 both comprise an inner pipeline 1 and a leakproof jacket 2. The leakproof jacket 2 is wrapped around the outer side of the inner pipeline 1. The leakproof jacket 2 is welded to the inner pipeline 1. The outer diameter of the leakproof jacket 2 is 1.1 times the outer diameter of the inner pipeline 1. The annular closed space formed between the leakproof jacket 2 and the inner pipeline 1 is Leak-proof space, the inner pipeline 1 is made of S31603, the leak-proof jacket 2 is made of S30408, flanges 3 are provided at both ends of the inner pipeline 1, and the two ends of the inner pipeline 1 are respectively connected to the reactor 6 and the reflux tower 7 through the flanges 3, the leak-proof jacket 2 is provided with a pressure port 201, the pressure port 201 is connected to the pressure pipeline 202, the pressure pipeline 202 is provided with a root valve 4 and a pressure sensor 5, the pressure sensor 5 is provided with an alarm module, the alarm pressure of the alarm module is set to 50kPa, and the pressure sensor 5 is electrically connected to the controller.

[0021] In the liquid phase fluorination reactor, the strong acidic medium generated by the catalyst and anhydrous hydrogen fluoride is easily entrained into the gas phase pipeline 8 by the product flow. After condensation in the reflux tower 7, the heavy component catalyst, hydrogen fluoride, etc. are refluxed to the reactor 6 through the liquid phase pipeline 9. Under normal production conditions, the root valve 4 and the pressure sensor 5 are installed on the pressure-taking pipeline 202 on the leak-proof jacket 2 of the gas phase pipeline 8 and the liquid phase pipeline 9, and the high pressure limit alarm is set. If the inner pipeline 1 is corroded by the material, the inner pipeline 1 leaks, and the material enters the leak-proof jacket 2, the material is instantly vaporized from the high pressure to the low pressure system, resulting in a sudden increase in the pressure in the leak-proof jacket 2. The controller responds according to the signal of the pressure sensor 5, and the alarm is issued after the pressure reaches the set alarm value, prompting the operator to respond as soon as possible. Emergency treatment of the production equipment is carried out within the response time, which prevents the leakage of toxic and harmful materials in the on-site operating environment. During emergency treatment, the pressure sensor 5 is removed, and the pressure-taking pipeline 202 connected to the root valve 4 is used to discharge and evacuate the pressure to prevent materials from leaking into the environment, causing environmental pollution and personal injury.

Claims

1. A gas-liquid phase system that avoids leakage, characterized in that: The invention comprises a reactor (6), a reflux tower (7) and a controller. A gas phase pipeline (8) and a liquid phase pipeline (9) are arranged between the reactor (6) and the reflux tower (7). The gas phase pipeline (8) and the liquid phase pipeline (9) both comprise an inner pipeline (1) and a leakproof jacket (2). The leakproof jacket (2) is wrapped around the outer side of the inner pipeline (1). The leakproof jacket (2) is fixedly connected to the inner pipeline (1). Flanges (3) are arranged at both ends of the inner pipeline (1). The two ends of the inner pipeline (1) are respectively connected to the reactor (6) and the reflux tower (7) through the flanges (3). The leakproof jacket (2) is provided with a pressure port (201). The pressure port (201) is connected to a pressure pipeline (202). The pressure pipeline (202) is provided with a root valve (4) and a pressure sensor (5). The pressure sensor (5) is provided with an alarm module. The pressure sensor (5) is electrically connected to the controller.

2. The gas-liquid phase system for avoiding leakage as claimed in claim 1, characterized in that: The reactor (6) is a liquid phase fluorination reactor.

3. The gas-liquid phase system for avoiding leakage as claimed in claim 1, characterized in that: The leak-proof jacket (2) is welded to the inner pipeline (1).

4. The gas-liquid phase system for avoiding leakage as claimed in claim 1, characterized in that: The outer diameter of the leak-proof jacket (2) is 1.1-1.3 times the outer diameter of the inner pipeline (1).

5. The gas-liquid phase system for avoiding leakage as claimed in claim 1, characterized in that: The inner pipeline (1) and the leak-proof jacket (2) are both made of stainless steel.

6. The gas-liquid phase system for avoiding leakage as claimed in claim 1, characterized in that: The alarm pressure of the alarm module is set to 50-100 kPa.

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