A delivery conduit for sulfur trioxide gas

Abstract

The utility model discloses a kind of conveying pipelines for sulfur trioxide gas, it is related to conveying equipment technical field, including pipe body, first steam pipe and second steam pipe, the first steam pipe and second steam pipe are arranged in pipe body in spiral mode, the both ends of the pipe body are connected with connecting flange, auxiliary mechanism is set on the pipe body for the heat tracing and gas leakage detection of the connecting section of pipe body, the pipe body is sequentially composed of conveying layer, heat conduction layer and insulating layer inside and outside, the first steam pipe and second steam pipe are buried in heat conduction layer, the first steam pipe and second steam pipe are spiral alternately distributed, the utility model is by the first steam pipe and second steam pipe in spiral alternately mode arrangement in pipe body, and reasonably collocating hottest end and low temperature end of steam pipe, make whole pipe body temperature distribution uniform, to ensure the continuity and stability of gas conveying, reduce the risk of pipeline blockage.

Description

Technical Field

[0001] This utility model relates to the field of conveying equipment technology, and in particular to a conveying pipeline for sulfur trioxide gas. Background Technology

[0002] In the sulfonation process of chemical production, sulfur trioxide is an indispensable core reactant. It has extremely high chemical activity and can undergo sulfonation reactions with many organic compounds. The boiling point of sulfur trioxide is 44.8℃. During transportation, once the pipeline temperature is lower than its boiling point, sulfur trioxide gas will quickly condense into liquid or even solid. In order to ensure that sulfur trioxide gas remains in a stable gaseous state during transportation and reaches the reaction equipment smoothly, effective heating of the transportation pipeline is required.

[0003] Currently, steam tracing is a commonly used method for heat tracing of sulfur trioxide gas pipelines in chemical production. Its basic structure involves setting a jacket around the pipeline, with a steam inlet at one end and a steam outlet at the other. However, existing steam tracing methods have some obvious drawbacks. As steam enters the jacket from the inlet, it continuously releases heat during its flow, resulting in a higher temperature near the steam inlet and a lower temperature near the steam outlet, leading to uneven temperature distribution throughout the pipeline. To ensure the tracing effect, the steam temperature needs to be increased. Furthermore, the connection between two pipelines is a weak point in steam tracing, where a heat tracing vacuum zone may exist. Therefore, a new method for transporting sulfur trioxide gas is proposed. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to propose a pipeline for transporting sulfur trioxide gas.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A pipeline for conveying sulfur trioxide gas includes a pipe body, a first steam pipe and a second steam pipe, the first steam pipe and the second steam pipe being arranged spirally in the pipe body, both ends of the pipe body being connected to connecting flanges, and the pipe body being provided with an auxiliary mechanism for heat tracing of the connecting sections of the pipe body and for detecting gas leaks.

[0006] Preferably, the pipe body consists of a conveying layer, a heat-conducting layer and a heat-insulating layer from the inside out, and the first steam pipe and the second steam pipe are embedded in the heat-conducting layer, and the first steam pipe and the second steam pipe are arranged in a spiral alternation.

[0007] Preferably, the auxiliary mechanism includes two annular fixing plates, which are respectively connected to the outer walls of both ends of the pipe body. The first steam pipe and the second steam pipe are located outside the pipe body and are arranged between the connecting flange and the fixing plates. One fixing plate is connected to an annular bellows cover near the adjacent connecting flange. The side of the bellows cover away from the fixing plate is connected to a first magnetic ring. The other fixing plate is connected to a second magnetic ring near the adjacent connecting flange.

[0008] Preferably, a gas sensor is installed on the fixing plate located on one side of the second magnetic ring to monitor sulfur trioxide gas.

[0009] Preferably, a flow valve is installed at one end of the first steam pipe, and a flow valve is installed at the end of the second steam pipe away from the flow valve on the first steam pipe.

[0010] Preferably, the conveying layer is made of carbon steel and its inner wall is coated with an epoxy resin anti-corrosion coating.

[0011] Preferably, the thermally conductive layer is made of a copper alloy material.

[0012] Compared with the prior art, the advantages of this utility model are: 1. This utility model arranges the first steam pipe and the second steam pipe in a spiral alternation in the pipe body, and reasonably matches the hottest end and the coldest end of the steam pipe to make the temperature distribution of the entire pipe body uniform, thereby ensuring the continuity and stability of gas transportation and reducing the risk of pipe blockage.

[0013] 2. The auxiliary mechanism of this utility model forms a closed space at the connection of the two pipes, and the steam in the first steam pipe and the second steam pipe releases heat when passing through this closed space for heat tracing at the connection, which effectively solves the problem of vacuum zone at the connection. At the same time, the closed space enables the gas sensor to quickly detect gas leakage, improving production safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a structural schematic diagram of the present invention from another angle.

[0016] Figure 3 This is a cross-sectional view of the structure of this utility model.

[0017] In the figure: 1 pipe body, 101 conveying layer, 102 heat conduction layer, 103 insulation layer, 2 connecting flange, 3 first steam pipe, 4 second steam pipe, 5 flow valve, 6 fixing plate, 7 bellows cover, 8 first magnetic ring, 9 second magnetic ring, 10 gas sensor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figure 1-3 As shown, a pipeline for conveying sulfur trioxide gas includes a pipe body 1, a first steam pipe 3 and a second steam pipe 4. The first steam pipe 3 and the second steam pipe 4 are arranged in a spiral manner inside the pipe body 1. Both ends of the pipe body 1 are connected to connecting flanges 2. An auxiliary mechanism is provided on the pipe body 1 for heat tracing of the connecting section of the pipe body 1 and gas leakage detection.

[0020] In this embodiment, the pipe body 1 is composed of a conveying layer 101, a heat-conducting layer 102, and a heat-insulating layer 103 from the inside out. The first steam pipe 3 and the second steam pipe 4 are embedded in the heat-conducting layer 102 and are arranged in a spiral alternation. The conveying layer 101 is made of carbon steel and its inner wall is coated with an epoxy resin anti-corrosion coating. Epoxy resin has excellent corrosion resistance and can effectively prevent sulfur trioxide gas from corroding the conveying layer 101 and extend the service life of the conveying layer 101. The heat-conducting layer 102 is made of copper alloy material and can quickly transfer steam heat to the conveying layer 101 to heat the sulfur trioxide gas in the pipe.

[0021] In this embodiment, the auxiliary mechanism includes two annular fixing plates 6. The two fixing plates 6 are respectively connected to the outer walls of both ends of the pipe body 1. The first steam pipe 3 and the second steam pipe 4 are located outside the pipe body 1 and are arranged between the connecting flange 2 and the fixing plates 6. One fixing plate 6 is connected to an annular bellows cover 7 near the adjacent connecting flange 2. The side of the bellows cover 7 away from the fixing plate 6 is connected to a first magnetic ring 8. The other fixing plate 6 is connected to a second magnetic ring 9 near the adjacent connecting flange 2. A gas sensor is installed on the fixing plate 6 located on the side of the second magnetic ring 9 to monitor sulfur trioxide gas.

[0022] In this embodiment, a flow valve 5 is installed at one end of the first steam pipe 3, and a flow valve 5 is installed at the end of the second steam pipe 4 away from the flow valve 5 on the first steam pipe 3. The flow valve 5 can precisely control the flow rate of steam, thereby adjusting the heat tracing temperature.

[0023] Working process and its principle: In use, the connecting flanges 2 of the two pipe bodies 1 are connected by bolts. After the connection is completed, the first magnetic ring 8 is pulled close to the second magnetic ring 9 on the other pipe body 1. The connection is completed by the magnetic attraction of the first magnetic ring 8 and the second magnetic ring 9, so that the connection of the two pipe bodies 1 is in a relatively closed space. During the gas transportation process, the steam in the first steam pipe 3 and the second steam pipe 4 will release some heat when passing through this closed space, which is used for heat tracing at the connection. At the same time, because the connection is relatively closed, when sulfur trioxide gas leaks, the gas sensor 10 can quickly detect it and issue a leak warning, which improves the safety of production.

[0024] Before gas delivery, steam is introduced into the first steam pipe 3 and the second steam pipe 4 at one end of the flow valve 5. The two streams of steam enter from both ends of the pipe body 1 and release heat through the heat-conducting layer 102 to the delivery layer 101, preheating the pipe body 1 before gas delivery. Since the hottest end of the first steam pipe 3 (the end of the flow valve 5 on the right) is matched with the low-temperature end of the second steam pipe 4 (the steam outlet end on the right), and the hottest end of the second steam pipe 4 (the end of the flow valve 5 on the left) is matched with the low-temperature end of the first steam pipe 3 (the steam outlet end on the left), the temperature distribution of the entire pipe body 1 is uniform, avoiding the large temperature difference between the two ends of the original sleeve heat tracing. In addition, the hottest end of the first steam pipe 3 and the hottest end of the second steam pipe 4 on each pipe body 1 are close to the two ends of the pipe, further compensating for the problem of insufficient heat tracing at the connection of the two pipe bodies 1.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pipeline for conveying sulfur trioxide gas, characterized in that, It includes a pipe body (1), a first steam pipe (3) and a second steam pipe (4). The first steam pipe (3) and the second steam pipe (4) are arranged in a spiral manner inside the pipe body (1). Both ends of the pipe body (1) are connected to connecting flanges (2). The pipe body (1) is provided with an auxiliary mechanism for heat tracing and gas leakage detection of the connecting section of the pipe body (1).

2. The pipeline for conveying sulfur trioxide gas according to claim 1, characterized in that, The pipe body (1) is composed of a conveying layer (101), a heat-conducting layer (102) and a heat-insulating layer (103) from the inside to the outside. The first steam pipe (3) and the second steam pipe (4) are buried in the heat-conducting layer (102). The first steam pipe (3) and the second steam pipe (4) are arranged in a spiral alternation.

3. A pipeline for conveying sulfur trioxide gas according to claim 1, characterized in that, The auxiliary mechanism includes two annular fixing plates (6), which are respectively connected to the outer walls of both ends of the pipe body (1). The first steam pipe (3) and the second steam pipe (4) are located outside the pipe body (1) and are arranged between the connecting flange (2) and the fixing plate (6). One of the fixing plates (6) is connected to an annular bellows cover (7) on the side near the adjacent connecting flange (2). The bellows cover (7) is connected to a first magnetic ring (8) on the side away from the fixing plate (6). The other fixing plate (6) is connected to a second magnetic ring (9) on the side near the adjacent connecting flange (2).

4. A pipeline for conveying sulfur trioxide gas according to claim 3, characterized in that, A gas sensor is installed on the fixing plate (6) located on one side of the second magnetic ring (9) to monitor sulfur trioxide gas.

5. A pipeline for conveying sulfur trioxide gas according to claim 1, characterized in that, A flow valve (5) is installed at one end of the first steam pipe (3), and a flow valve (5) is installed at the end of the second steam pipe (4) away from the first steam pipe (3) where the flow valve (5) is located.

6. A pipeline for conveying sulfur trioxide gas according to claim 2, characterized in that, The conveying layer (101) is made of carbon steel and its inner wall is coated with an epoxy resin anti-corrosion coating.

7. A pipeline for conveying sulfur trioxide gas according to claim 2, characterized in that, The heat-conducting layer (102) is made of copper alloy material.

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