Hydrocarbon analysis gasification device for air separation unit

Abstract

The utility model provides a hydrocarbon analysis gasification device for an air separation unit, which comprises a main cooler, a vaporizer and a capillary tube used for connecting a to-be-detected position of the main cooler and the vaporizer, the capillary tube is spirally arranged along the vaporizer, the outlet end of the capillary tube is connected with at least two outlet pipelines, and the at least two outlet pipelines are provided with stop valves; according to the utility model, the safety and accuracy of hydrocarbon analysis of the air separation device are improved, and the gasification stability of hydrocarbon liquid oxygen is ensured.

Description

Technical Field

[0001] This utility model relates to the field of air separation devices, and more particularly to a hydrocarbon analysis and gasification device for air separation devices. Background Technology

[0002] In air separation units, hydrocarbon impurities easily accumulate in the main refrigerated liquid oxygen. If the acetylene content in the liquid oxygen exceeds 0.5 ppm or the total hydrocarbon content exceeds 300 ppm, spontaneous combustion and explosion may occur. The conventional practice is to continuously extract hydrocarbon-containing liquid oxygen from the main refrigeration unit using a 1 / 4-inch (approximately 14 mm outer diameter) instrument tube, then convert it into a gaseous state through electric heating, and finally send it to the analyzer to analyze the hydrocarbon content. However, due to the possibility of cross-contamination of samples caused by liquid residue inside the pipeline, and the safety hazards of electric heating, the traditional method has limited monitoring accuracy and sampling efficiency, as well as safety risks. Utility Model Content

[0003] The purpose of this invention is to provide a hydrocarbon analysis and vaporization device for air separation units that improves the safety and accuracy of hydrocarbon analysis and ensures stable vaporization of hydrocarbon liquid oxygen.

[0004] To solve the above-mentioned technical problems, this utility model provides a hydrocarbon analysis vaporization device for an air separation unit, including a main cooler and a vaporizer, a capillary tube for connecting the detection position of the main cooler and the vaporizer, the capillary tube being spirally arranged along the vaporizer, and the outlet end of the capillary tube being connected to at least two outlet pipes, and at least two outlet pipes being equipped with shut-off valves.

[0005] Furthermore, the outlet end of the capillary is connected to the outlet pipeline via a buffer tank.

[0006] Furthermore, a T-junction is provided between the buffer tank and the outlet pipeline.

[0007] Furthermore, the diameter of the capillary is 1 / 8 inch.

[0008] Furthermore, the vaporizer is an air-bath type vaporizer.

[0009] Furthermore, the capillary tube is connected to the bottom of the main cooler.

[0010] Furthermore, the capillary is made of 6Mo material.

[0011] The beneficial effects of this invention are as follows: Hydrocarbons at the detection location in the main cooling system are extracted via a capillary tube, allowing them to flow along the capillary tube to the vaporizer. The vaporizer then vaporizes the low-temperature hydrocarbons to ambient temperature. Because the capillary tube is spirally arranged along the vaporizer, the hydrocarbons have sufficient vaporization time to ensure effective vaporization. When the hydrocarbons are fully vaporized and discharged, the gas is discharged to the analysis equipment or equipment exhaust point via two outlet pipes. A shut-off valve controls the specific discharge path of the gas, improving the stability of analysis and discharge control. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Attached reference numerals: 1. Main coolant; 2. Vaporizer; 3. Capillary tube; 5. Outlet pipe; 6. Shut-off valve; 7. Buffer tank; 8. T-junction. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0015] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0016] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0017] like Figure 1The present invention provides a hydrocarbon analysis vaporization device for an air separation unit, including a main cooler 1 and a vaporizer 2, for connecting the detection position of the main cooler 1 and the capillary tube 3 of the vaporizer 2. The capillary tube 3 is spirally arranged along the vaporizer 2, and the outlet end of the capillary tube 3 is connected to at least two outlet pipes 5, and at least two outlet pipes 5 are equipped with shut-off valves 6.

[0018] The hydrocarbons to be detected in the main cooling system are extracted through a capillary tube, allowing them to flow along the capillary to the vaporizer. The vaporizer then vaporizes the low-temperature hydrocarbons to ambient temperature. Because the capillary is spirally arranged along the vaporizer, the hydrocarbons have sufficient vaporization time to ensure effective vaporization. When the hydrocarbons are fully vaporized and discharged, the gas is discharged to the analysis equipment or equipment exhaust point through two outlet pipes. The specific discharge path of the gas is controlled by a shut-off valve to improve the stability of analysis and discharge control.

[0019] The analytical equipment is the same as the existing equipment used to detect hydrocarbon content, and will not be described in detail here.

[0020] In a preferred embodiment of this solution, the capillary 3 has a diameter of 1 / 8 inch. Since the inner wall surface area of ​​the 1 / 8 inch capillary is small, the amount of liquid residue flowing through it will be reduced, making it less likely to generate liquid residue and avoiding cross-contamination between multiple samples. In addition, the smaller diameter capillary can shorten the time it takes for liquid to travel from the sampling location to the vaporizer, making the liquid sampling response speed faster.

[0021] In a preferred embodiment of this solution, the capillary 3 is made of 6Mo material, so that the capillary itself has the advantage of corrosion resistance and is easier to perform long-term hydrocarbon sampling and analysis.

[0022] Preferably, the outlet end of the capillary 3 is connected to the outlet pipeline 5 via a buffer tank 7.

[0023] Specifically, the buffer tank absorbs the instantaneous pressure shock caused by sudden changes in pressure or flow rate, thereby ensuring the stability of the gas at the outlet pipeline, improving the gas stability during hydrocarbon analysis and discharge processes, and increasing the overall safety of the equipment.

[0024] Preferably, a three-way pipe 8 is provided between the buffer tank 7 and the outlet pipe 5, so that the gas after absorbing pressure at the buffer tank can be connected to the two outlet pipes through the three-way pipe, and discharged at different functional positions in conjunction with the shut-off valve.

[0025] Preferably, the vaporizer 2 is an air bath type vaporizer.

[0026] Specifically, since the air bath vaporizer mainly uses outside air in conjunction with capillary tubes to heat and vaporize hydrocarbons, it does not require electric heating, making it safer. Combined with the spiral arrangement of capillary tubes, it can achieve both safety and ensure sufficient and complete vaporization.

[0027] Preferably, the capillary tube 3 is connected to the bottom of the main cooler 1.

[0028] Specifically, hydrocarbon impurities tend to accumulate in the liquid oxygen at the bottom of the main cooler of the air separation unit, resulting in a higher hydrocarbon content at the bottom of the main cooler. Therefore, sampling and testing the bottom of the main cooler can ensure the overall detection effect of the air separation unit and prevent the detection results from being too low.

[0029] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A hydrocarbon analysis and gasification device for an air separation unit, characterized in that: Includes a main cooler (1) and a vaporizer (2), a capillary tube (3) for connecting the detection position of the main cooler (1) and the vaporizer (2), the capillary tube (3) is spirally arranged along the vaporizer (2), the outlet end of the capillary tube (3) is connected to at least two outlet pipes (5), and at least two outlet pipes (5) are equipped with shut-off valves (6).

2. The hydrocarbon analysis and gasification device for air separation unit according to claim 1, characterized in that: The outlet end of the capillary (3) is connected to the outlet pipeline (5) via a buffer tank (7).

3. The hydrocarbon analysis and gasification device for air separation unit according to claim 2, characterized in that: A tee pipe (8) is provided between the buffer tank (7) and the outlet pipe (5).

4. The hydrocarbon analysis and gasification device for air separation unit according to claim 1, characterized in that: The diameter of the capillary (3) is 1 / 8 inch.

5. The hydrocarbon analysis and gasification device for air separation unit according to claim 1, characterized in that: The vaporizer (2) is an air bath type vaporizer.

6. The hydrocarbon analysis and gasification device for air separation unit according to claim 1, characterized in that: The capillary tube (3) is connected to the bottom of the main cooler (1).

7. The hydrocarbon analysis and gasification device for air separation unit according to claim 1, characterized in that: The capillary tube (3) is made of 6Mo material.

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