Phosphoric acid conveying pipeline with steam tracing pipe

Abstract

A phosphoric acid conveying pipeline with a steam tracing pipe comprises an acid conveying pipeline body and the steam tracing pipe arranged outside the acid conveying pipeline body, the acid conveying pipeline body is sleeved with the steam tracing pipe, and sealing covers connected with the outer wall of the acid conveying pipeline body are arranged at the two ends of the steam tracing pipe. A circulation space for high-temperature steam to pass through is formed between the steam tracing pipe and the acid conveying pipeline; the steam tracing pipe comprises an upper cylinder part, a lower conical cylinder part and a connecting pipe part for connecting the upper cylinder part and the lower conical cylinder part, a steam inlet is formed in the top of the upper cylinder part, and a steam outlet is formed in the bottom of the lower conical cylinder part; heat-conducting spiral fins are arranged on the outer wall of the acid conveying pipeline from top to bottom. The utility model has the advantages of high efficiency, energy conservation, safety, reliability and the like, the driving time is prolonged, and the parking maintenance frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of phosphoric acid process technology, specifically to a phosphoric acid transport pipeline with a steam tracing pipe. Background Technology

[0002] In phosphoric acid production, acid transport pipelines are crucial links connecting various production stages. However, in low-temperature environments, the acid easily solidifies or flows slowly, leading to pipeline blockages, severely impacting production efficiency and even causing safety accidents. Traditional heating methods suffer from high energy consumption, uneven heating, and ineffective results. Before the technical upgrade, the acid transport pipelines suffered from severe scaling, resulting in short continuous operation cycles and frequent maintenance, posing safety risks. To improve production cycles and reduce worker safety risks, the workshop installed heat tracing pipes, reducing maintenance frequency, lessening worker workload, and minimizing safety risks. Utility Model Content

[0003] The purpose of this utility model is to address the above-mentioned shortcomings by providing a phosphoric acid transport pipeline with a steam tracing pipe.

[0004] This utility model includes an acid conveying pipeline and a steam tracing pipe installed outside it. The steam tracing pipe is sleeved on the outside of the acid conveying pipeline, and both ends of the steam tracing pipe are provided with sealing caps that are connected to the outer wall of the acid conveying pipeline. A flow space for high-temperature steam to pass through is formed between the steam tracing pipe and the acid conveying pipeline.

[0005] The steam tracing pipe includes an upper cylindrical section, a lower conical section, and a connecting pipe section that connects the two. The top of the upper cylindrical section is provided with a steam inlet, and the bottom of the lower conical section is provided with a steam outlet.

[0006] The outer wall of the acid transport pipeline is provided with heat-conducting spiral fins from top to bottom.

[0007] Preferably, the diameter of the lower conical cylindrical section decreases from top to bottom.

[0008] Preferably, the upper cylindrical part, the lower conical cylindrical part, and the connecting pipe part are integrally formed structures.

[0009] Preferably, the outer wall of the steam tracing pipe is provided with a heat insulation layer, which includes an aluminum silicate fiber layer and a polyurethane foam layer arranged sequentially from the inside to the outside.

[0010] Preferably, the total thickness of the aluminum silicate fiber layer and the polyurethane foam layer is not less than 70 mm.

[0011] Preferably, the steam inlet is connected to an air inlet pipe, and a steam filter and a steam-water separator are sequentially installed on the air inlet pipe.

[0012] Preferably, the air intake pipe is also equipped with a steam pressure gauge.

[0013] The advantages of this utility model are: it is efficient, energy-saving, safe, and reliable, extending the driving time and reducing the frequency of shutdown and maintenance. Attached Figure Description

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

[0015] Figure 2 This is a schematic diagram of the insulation layer. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0018] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the utility model. Furthermore, if terms such as "first" or "second" appear in the description of this utility model, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] As shown in the attached figure, the present invention includes an acid conveying pipe 1 and a steam tracing pipe 2 disposed outside the pipe. The steam tracing pipe 2 is sleeved on the outside of the acid conveying pipe 1. Both ends of the steam tracing pipe 2 are provided with sealing caps 3 connected to the outer wall of the acid conveying pipe 1. A flow space for high-temperature steam to pass through is formed between the steam tracing pipe 2 and the acid conveying pipe 1.

[0021] The steam tracing pipe 2 includes an upper cylindrical section 11, a lower conical section 12, and a connecting pipe section 13 connecting the two. The top of the upper cylindrical section 11 is provided with a steam inlet 4, and the bottom of the lower conical section 12 is provided with a steam outlet 5. A larger pipe diameter is used near the steam inlet to reduce the steam flow rate and reduce pressure loss. The pipe diameter is appropriately reduced in the later section to ensure that the steam can be fully utilized and to avoid insufficient heat in the later section.

[0022] The outer wall of the acid transport pipeline 1 is provided with heat-conducting spiral fins 15 from top to bottom. Compared with the traditional parallel laying method, this improves the uniformity of heat tracing and reduces the risk of solidification of materials in the pipeline due to localized low temperatures.

[0023] In another technical solution, the diameter of the lower conical cylindrical portion 12 decreases from top to bottom.

[0024] In another technical solution, the upper cylindrical part 11, the lower conical cylindrical part 12, and the connecting pipe part 13 are integrally formed.

[0025] In another technical solution, the outer wall of the steam tracing pipe 2 is provided with a heat insulation layer 20, which includes an aluminum silicate fiber layer 21 and a polyurethane foam layer 22 arranged sequentially from the inside to the outside.

[0026] In another technical solution, the total thickness of the aluminosilicate fiber layer 21 and the polyurethane foam layer 22 is not less than 70 mm. The aluminosilicate fiber layer is resistant to high temperatures, while the polyurethane foam layer has good sealing performance; this combination can greatly improve the thermal insulation effect. Increasing the insulation layer thickness to 70 mm can reduce the heat loss of the pipeline by approximately 20%.

[0027] In another technical solution, the steam inlet 4 is connected to an intake pipe 6, and a steam filter 7 and a steam-water separator 8 are sequentially installed on the intake pipe 6. Pure steam can transfer heat more efficiently and reduce water hammer within the pipe.

[0028] In another technical solution, a steam pressure gauge 9 is also provided on the air intake pipe 6.

[0029] Operating principle: High-temperature steam is introduced into the phosphoric acid delivery pipeline. Utilizing the high temperature of the steam, the acid solution inside the pipeline is heated efficiently and evenly, thereby improving its fluidity and preventing blockages. A steam tracing pipe, fitted onto the outside of the pipeline, is welded to the pipeline from top to bottom using a sealing cap. This creates a flow space between the steam tracing pipe and the pipeline, allowing high-temperature steam to pass through. The upper part of this flow space is connected to the steam pipe, transferring heat from the steam to the acid solution. Introducing steam into the flow space ensures effective heating.

[0030] The above-described embodiments are only intended to illustrate the technical solution and features of this utility model, and are intended to enable those skilled in the art to implement them. They should not be used to limit the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model are within the scope of protection of this utility model. Anything not described in detail is prior art.

Claims

1. A phosphoric acid transport pipeline with a steam tracing pipe, comprising a transport pipeline (1) and a steam tracing pipe (2) disposed thereout thereof, characterized in that, The steam tracing pipe (2) is sleeved on the outside of the acid conveying pipe (1). Both ends of the steam tracing pipe (2) are provided with sealing caps (3) that are connected to the outer wall of the acid conveying pipe (1). A flow space for high-temperature steam to pass through is formed between the steam tracing pipe (2) and the acid conveying pipe (1). The steam tracing pipe (2) includes an upper cylindrical part (11), a lower conical part (12), and a connecting pipe part (13) that connects the two. The upper cylindrical part (11) has a steam inlet (4) at the top and a steam outlet (5) at the bottom of the lower conical part (12). The outer wall of the acid transport pipe (1) is provided with heat-conducting spiral fins (15) from top to bottom.

2. A phosphoric acid transport pipeline with a steam tracing pipe according to claim 1, characterized in that, The diameter of the lower conical cylindrical section (12) decreases from top to bottom.

3. A phosphoric acid transport pipeline with a steam tracing pipe according to claim 1, characterized in that, The upper cylindrical part (11), the lower conical cylindrical part (12), and the connecting pipe part (13) are integrally formed structures.

4. A phosphoric acid transport pipeline with a steam tracing pipe according to claim 1, characterized in that, The outer wall of the steam tracing pipe (2) is provided with a heat insulation layer (20), which includes an aluminum silicate fiber layer (21) and a polyurethane foam layer (22) arranged sequentially from the inside to the outside.

5. A phosphoric acid transport pipeline with a steam tracing pipe according to claim 4, characterized in that, The total thickness of the aluminum silicate fiber layer (21) and the polyurethane foam layer (22) is not less than 70 mm.

6. A phosphoric acid transport pipeline with a steam tracing pipe according to claim 1, characterized in that, The steam inlet (4) is connected to an air inlet pipe (6), and a steam filter (7) and a steam-water separator (8) are sequentially installed on the air inlet pipe (6).

7. A phosphoric acid transport pipeline with a steam tracing pipe according to claim 6, characterized in that, The air intake pipe (6) is also equipped with a steam pressure gauge (9).

Images