CN214618335U

CN214618335U - Heat conduction oil jacket sleeve device

Info

Publication number: CN214618335U
Application number: CN202120452565.9U
Authority: CN
Inventors: 卢夺
Original assignee: LUOYANG RUIZE PETROCHEMICAL ENGINEERING CO LTD
Current assignee: LUOYANG RUIZE PETROCHEMICAL ENGINEERING CO LTD
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2021-11-05
Anticipated expiration: 2031-03-02

Abstract

A heat-conducting oil jacketed pipe device comprises jacketed pipes, wherein each jacketed pipe comprises a process inner pipe and a heat-conducting oil outer pipe, the process inner pipes are used for conveying process media, the heat-conducting oil outer pipes are sleeved on the outer sides of the process inner pipes and used for conveying heating media, the jacketed pipes are arranged in multiple sections, the process inner pipes between two adjacent sections of jacketed pipes are communicated with each other, and the heat-conducting oil outer pipes are communicated with each other; the first section of the jacketed pipe is connected with a heat-conducting oil supply station through a heat-conducting oil supply main pipe, and the last section of the jacketed pipe is connected with a heat-conducting oil return station through a heat-conducting oil return main pipe. The utility model discloses heating system's initial investment and operating cost in the reducible petrochemical industry device satisfy not equidimension heating, refrigerated technology needs, and operational safety is higher than water and steam system.

Description

Heat conduction oil jacket sleeve device

Technical Field

The utility model belongs to petrochemical device design field, concretely relates to conduction oil jacket sleeve device.

Background

The jacketed pipe is a special heat-insulating pipe for heating fluid or maintaining the temperature of the fluid, and can maintain the fluidity and the temperature of the fluid conveyed in the pipe, and effectively prevent the conveyed fluid from being condensed and solidified in the conveying process.

In some petrochemical plants, such as solvent deasphalting plants, there are process lines that are partially based on asphalt as a process medium. Because the asphalt medium is viscous and has high softening point temperature, several heat tracing modes such as steam jacket heat tracing, steam heat tracing pipe, heat-conducting daub heat tracing, electric heat tracing and the like are often needed in the process of conveying the process medium, so that the fluidity of the process medium is ensured.

The heat conducting oil as industrial oil has the performance of resisting thermal cracking and chemical oxidation, and has good heat transfer efficiency, fast heat dissipation and good thermal stability. The heat transfer oil is used as a heat transfer medium and has the following characteristics:

1. at near atmospheric conditions, very high operating temperatures can be achieved. The operating pressure and the safety requirement of a high-temperature heating system are greatly reduced, and the reliability of the system and equipment is improved;

2. the process requirements of heating and cooling at different temperatures can be met in a wider temperature range, or the process requirements of high-temperature heating and low-temperature cooling can be simultaneously realized by using the same heat-conducting oil in the same system, so that the complexity of the system and the operation is reduced;

3. a water treatment system and equipment are omitted, the heat efficiency of the system is improved, the maintenance workload of the equipment and pipelines is reduced, and the initial investment and the operation cost of a heating system are reduced;

4. since the heat transfer oil system operates under atmospheric conditions, it is safer to operate than the water and steam system.

Therefore, the heat transfer oil is widely applied to the field of petrochemical industry as an excellent heat transfer medium.

SUMMERY OF THE UTILITY MODEL

In order to regard the conduction oil as heat transfer medium, the utility model provides a conduction oil jacket sleeve pipe device.

The utility model aims at adopting the following technical scheme to realize. According to the utility model provides a conduction oil jacket sleeve device, including the jacket sleeve, the jacket sleeve includes the technology inner tube that is used for carrying the technology medium, overlaps the conduction oil outer tube that is established outside the technology inner tube and is used for carrying the heating medium, and the jacket sleeve divides the multisection setting and the technology inner tube between two adjacent sections jacket sleeve intercommunication each other, conduction oil outer tube intercommunication each other; the first section of the jacketed pipe is connected with a heat-conducting oil supply station through a heat-conducting oil supply main pipe, and the last section of the jacketed pipe is connected with a heat-conducting oil return station through a heat-conducting oil return main pipe.

Furthermore, the circulation of the heat conduction oil between the two adjacent jacket sleeves is carried out through an external connecting pipeline, the two ends of the external connecting pipeline are communicated with the corresponding heat conduction oil outer pipes of the two adjacent jacket sleeves, the external connecting pipeline is divided into a plurality of sections of pipes, the adjacent two sections of pipes are detachably connected and communicated with each other, and an outer pipe liquid discharge port for discharging the heating medium in the heat conduction oil outer pipe is arranged on the external connecting pipeline.

Furthermore, the material of the process inner tube is any one of carbon steel, stainless steel and alloy steel seamless steel tubes, and the material of the heat conduction oil outer tube is a seamless carbon steel tube.

Further, the jacketed pipe is connected with the heat conduction oil supply station and the heat conduction oil return station again every 60 meters.

Further, the length of each section of the jacket sleeve is not more than 6 meters.

Furthermore, the end parts of the process inner pipe and the heat conducting oil outer pipe in each section of jacket sleeve on the same side are simultaneously welded on the same jacket flange, and two adjacent sections of jacket sleeves are connected through the jacket flange.

Furthermore, the external welding of conduction oil outer tube has the enhancement coupling, strengthens the coupling and is connected with the external connection pipeline that is used for carrying the heating medium, and the head of external connection pipeline, end are connected with the enhancement coupling that corresponds on the conduction oil outer tube respectively.

Furthermore, the outer pipe connecting pipeline comprises pipes, outer pipe connecting flanges, elbows and tee joints which are communicated into a whole, the outer pipe connecting flanges are welded at the two ends of each section of pipe, and the two adjacent sections of pipes are connected through the outer pipe connecting flanges.

Furthermore, the outer pipe liquid discharge port comprises a flange communicated with an external connecting pipeline and a flange cover for blocking the opening of the flange, the flange cover is fixed on the flange through bolts, a gasket is arranged between the flange cover and the flange to achieve a sealing effect, and the outer pipe liquid discharge port is arranged at the lowest point of the outer pipe connecting pipeline.

Further, the heating medium of the external connecting pipe flows in from a higher position of the external pipe and flows out from a lower position of the external pipe.

Compared with the prior art, the utility model discloses an useful part lies in:

1. the jacketed pipe can take heat-conducting oil as a heat-transfer medium, can obtain very high operating temperature under the condition of being close to normal pressure, greatly reduces the operating pressure and safety requirements of a high-temperature heating system, and improves the reliability of the system and equipment; the process requirements of heating and cooling at different temperatures can be met in a wider temperature range, or the process requirements of high-temperature heating and low-temperature cooling can be simultaneously realized by using the same heat-conducting oil in the same system, so that the complexity of the system and the operation is reduced; a water treatment system and equipment are omitted, the heat efficiency of the system is improved, the maintenance workload of the equipment and pipelines is reduced, and the initial investment and the operation cost of a heating system are reduced; since the heat transfer oil system operates under atmospheric conditions, it is safer to operate than the water and steam system.

2. The maximum heating length of the device from the heat conduction oil main pipe to the heat conduction oil jacket pipe is 60 meters, and the heating effect is good; the process inner pipe and the heat-conducting oil outer pipe are arranged in a segmented manner, so that the process inner pipe and the heat-conducting oil outer pipe are prevented from being heated and expanded; the device is provided with an outer pipe connecting flange and an outer pipe liquid outlet, so that the maintenance and the recovery of heat conduction oil are facilitated; the process medium and the heat transfer medium flow in reverse directions, so that the heat transfer temperature and the heat exchange efficiency are ensured; the flow direction of the heat conducting oil in the outer pipe connecting pipeline is from a higher position of the outer pipe connecting pipeline to a lower position of the outer pipe connecting pipeline, and the minimum loss of fluid pressure drop is ensured.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a side view of the jacket flange of FIG. 1 taken across;

fig. 3 is a top view of fig. 2.

[ reference numerals ]

1-a process inner pipe, 2-a heat-conducting oil outer pipe, 3-a jacket flange, 4-a reinforced pipe joint, 5-an outer pipe connecting pipeline, 6-an outer pipe connecting flange, 7-an outer pipe liquid discharging port, 8-a heat-conducting oil supply station, 9-a heat-conducting oil supply main pipe, 10-a heat-conducting oil return station, 11-a heat-conducting oil return main pipe and 12-a jacket pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model relates to an embodiment of conduction oil jacket sleeve pipe device, as shown in fig. 1 to fig. 3, including technology inner tube 1, conduction oil outer tube 2, press from both sides cover flange 3, strengthen coupling 4, outer tube connecting pipe 5, outer tube connecting flange 6, outer tube leakage fluid dram 7. The process inner pipe 1 is a pipeline for conveying process media such as asphalt and the like, and the pipeline material is determined according to the material grade and is generally a carbon steel, stainless steel or alloy steel seamless steel pipe; the heat conducting oil outer pipe 2 is sleeved on the process inner pipe 1 and used for conveying heat conducting oil serving as a heating medium, and is generally a seamless carbon steel pipe; according to the mechanical property of the material, considering the limit of the difference value of the thermal expansion amount of the materials of the process inner tube 1 and the conduction oil outer tube 2, the process inner tube 1 and the jacket tube 12 formed by the conduction oil outer tube 2 nested outside the process inner tube 1 are arranged in a plurality of sections, the length of each jacket tube is not more than 6 meters, two ends of each jacket tube are respectively welded with a jacket flange 3 which is simultaneously connected with the end parts of the process inner tube 1 and the conduction oil outer tube 2, and the two sections of jacket tubes are connected through the jacket flanges 3; the heat transfer oil heat transfer pipe comprises a process inner pipe 1, a heat transfer oil outer pipe 12, a heat transfer oil pipe joint 5, reinforcing pipe joints 4, an external connecting pipe 5, a heat transfer oil medium conveying pipe, a heat transfer oil pipe joint and a heat transfer oil pipe joint, wherein the reinforcing pipe joints 4 are welded at the two ends of each heat transfer oil outer pipe 2, the reinforcing pipe joints 4 are connected with the corresponding reinforcing pipe joints 4 on the two adjacent heat transfer oil outer pipes 2, the reinforcing pipe joints 5 are connected with the mutually adjacent reinforcing pipe joints 4, in the embodiment, the reinforcing pipe joints 4 are welded at the corresponding positions of the external connecting pipes 5, the heat transfer oil pipe joints and the heat transfer oil pipe joints flow between the process inner pipe 1 and the heat transfer oil outer pipes 2, and when meeting a jacket flange 3 between the two sections of jacket pipes 12; the outer pipe connecting pipeline 5 comprises a pipe, an elbow, a tee joint and other components which are communicated into a whole, and the pipe diameter of the outer pipe connecting pipeline 5 is DN40 considering that the heating oil is liquid, so that smooth transmission of the heat conduction oil is ensured; the outer pipe connecting pipeline 5 is divided into a plurality of sections of pipes, the two ends of each section of pipe are welded with outer pipe connecting flanges 6, the two sections of pipes are connected into a whole through the outer pipe connecting flanges 6, when a certain section of outer pipe connecting pipeline 5 is overhauled, the outer pipe connecting flange 6 at the position is removed, and the whole outer pipe connecting pipeline 5 does not need to be removed; the outer pipe connecting pipeline 5 is externally provided with an outer pipe liquid discharge port 7, the outer pipe liquid discharge port 7 comprises a flange communicated with the outer connecting pipeline 5 and a flange cover for blocking an opening of the flange, the flange cover is fixed on the flange through bolts, a gasket is arranged between the flange cover and the flange to achieve a sealing effect, when the jacket pipe is overhauled, the flange cover is removed, and heat conduction oil in the heat conduction oil outer pipe 2 and the heat conduction oil in the outer connecting pipeline 5 are discharged from the flange. The head end of the jacketed pipe 12 is connected with a heat conduction oil supply station 8 through a heat conduction oil supply main pipe 9, the tail end of the jacketed pipe 12 is connected with a heat conduction oil return station 10 through a heat conduction oil return main pipe 11, heat conduction oil with proper temperature flows out of the heat conduction oil supply station 8, flows into the heat conduction oil outer pipe 2 of the first section of the jacketed pipe 12 through the heat conduction oil supply main pipe 9, then passes through the jacketed pipe 12 of each section and each external connecting pipeline 5 for connecting two adjacent sections of the jacketed pipes 12, finally flows into the heat conduction oil return main pipe 11 from the last section of the jacketed pipe, and flows into the heat conduction oil return station 10. If the total length of the jacketed pipes 12 exceeds 60 meters, in order to ensure the working effect of the heat conduction oil, the first section of the jacketed pipe of which the length exceeds 60 meters is reconnected with another heat conduction oil supply main pipe 9 led out from the heat conduction oil supply station 8, and then the last section of the jacketed pipe 12 of the section is led out another heat conduction oil return main pipe 11 connected to the heat conduction oil return station 10. By parity of reasoning, the jacketed pipes need to be reconnected with the heat-conducting oil supply station 8 and the heat-conducting oil return station 10 every 60 meters.

Before the process inner pipe 1 and the jacket flange 3 are welded, the heat-conducting oil outer pipe 2 is firstly sleeved on the process inner pipe 1, then the process inner pipe 1 and the jacket flange 3 are welded, and after the welding is finished, the weld joint is subjected to nondestructive testing according to the design specification requirement. And after the detection is qualified, welding the heat-conducting oil outer pipe 2 with the jacket flange 3, in the welding process, if dissimilar steel is welded, paying attention to that welding wires are selected according to dissimilar steel welding specifications, after the welding is finished, performing nondestructive detection on a welding seam, and entering the next step after the detection is qualified. The opening is arranged on the heat conducting oil outer pipe 2, the reinforced pipe joints 4 are welded at the opening in sequence, then the head ends and the tail ends of the external connecting pipelines 5 are respectively welded on the corresponding reinforced pipe joints 4, and then the pipes, the outer pipe connecting flanges 6, the elbows, the tee joints and the like in the external connecting pipelines 5 are welded in sequence. The outer pipe liquid discharge port 7 on the outer pipe connecting pipeline 5 is arranged at the lowest point of the outer pipe connecting pipeline 5, so that heat conducting oil can be emptied and recycled when the jacketed pipe is convenient to overhaul. After the welding is finished, the process inner pipe system and the process outer pipe system are respectively subjected to hydrostatic test according to the standard, and can be put into use after the test is qualified. The end part of the first section of the jacketed pipe 12 is welded with a joint which is connected with a heat-conducting oil supply main pipe 9, the end part of the last section of the jacketed pipe 12 is also welded with a joint which is connected with a heat-conducting oil return main pipe 11. In the design of the utility model, the effective maximum heating length is 60 meters according to the chemical principle, so the heating whole course between the heat-conducting oil supply main pipe 9 and the heat-conducting oil return main pipe 11 can not exceed 60 meters to the longest extent, and exceeds the limit value, and the heat-conducting oil supply main pipe 9 is additionally arranged to be led out from the heat-conducting oil supply station 8; according to the chemical principle, in order to ensure the heat transfer temperature and the heat exchange efficiency, the process medium (asphalt) and the heat transfer medium (heat conduction oil) are kept to flow reversely; in order to ensure the minimum loss of fluid pressure drop, the conduction oil in the outer pipe connecting pipe 5 flows in from the reinforced pipe joint 4 at the higher position of the conduction oil outer pipe 2 and flows out from the reinforced pipe joint 4 at the lower position of the conduction oil outer pipe 2.

The utility model discloses heating system's initial investment and operating cost in the reducible petrochemical industry device satisfy not equidimension heating, refrigerated technology needs, and operational safety is higher than water and steam system.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a conduction oil jacketed pipe device which characterized in that: the heat conduction oil pipe comprises a jacketed pipe, wherein the jacketed pipe comprises a process inner pipe for conveying a process medium and a heat conduction oil outer pipe which is sleeved outside the process inner pipe and used for conveying a heating medium, the jacketed pipe is arranged in multiple sections, the process inner pipes between two adjacent sections of jacketed pipes are mutually communicated, and the heat conduction oil outer pipes are mutually communicated; the first section of the jacketed pipe is connected with a heat-conducting oil supply station through a heat-conducting oil supply main pipe, and the last section of the jacketed pipe is connected with a heat-conducting oil return station through a heat-conducting oil return main pipe.

2. The conduction oil jacket sleeve device according to claim 1, wherein: the circulation of conduction oil between two adjacent jacketed pipes is carried out through an external connecting pipeline, the two ends of the external connecting pipeline are communicated with the corresponding conduction oil outer pipes of the two adjacent jacketed pipes, the external connecting pipeline is divided into a plurality of sections of pipes, the adjacent two sections of pipes are detachably connected and communicated with each other, and an outer pipe liquid discharge port for discharging a heating medium in the conduction oil outer pipe is arranged on the external connecting pipeline.

3. The conduction oil jacket sleeve device according to claim 1, wherein: the process inner pipe is made of any one of carbon steel, stainless steel and alloy steel seamless steel pipes, and the heat conduction oil outer pipe is made of a seamless carbon steel pipe.

4. The conduction oil jacket sleeve device according to claim 1, wherein: and the jacketed pipes are connected with the heat conduction oil supply station and the heat conduction oil return station again at intervals of 60 meters.

5. The conduction oil jacket sleeve device according to claim 1, wherein: the length of each section of the jacketed pipe does not exceed 6 meters.

6. The conduction oil jacket sleeve device according to claim 1, wherein: the end parts of the process inner pipe and the heat conducting oil outer pipe in each section of jacket sleeve on the same side are welded on the same jacket flange at the same time, and two adjacent sections of jacket sleeves are connected through the jacket flange.

7. The conduction oil jacket pipe device according to claim 2, wherein: the heat conduction oil heating device is characterized in that a reinforcing pipe joint is welded outside the heat conduction oil outer pipe and connected with an external connecting pipeline used for conveying a heating medium, and the head end and the tail end of the external connecting pipeline are respectively connected with the corresponding reinforcing pipe joints on the heat conduction oil outer pipe.

8. The conduction oil jacket pipe device according to claim 2, wherein: the outer pipe connecting pipeline comprises pipes, outer pipe connecting flanges, elbows and tee joints which are communicated into a whole, the outer pipe connecting flanges are welded at the two ends of each section of pipe, and the two adjacent sections of pipes are connected through the outer pipe connecting flanges.

9. The conduction oil jacket pipe device according to claim 2, wherein: the outer pipe liquid discharge port comprises a flange communicated with an external connecting pipeline and a flange cover for blocking the opening of the flange, the flange cover is fixed on the flange through bolts, a gasket is arranged between the flange cover and the flange to achieve a sealing effect, and the outer pipe liquid discharge port is arranged at the lowest point of the outer pipe connecting pipeline.

10. The conduction oil jacket pipe device according to claim 2, wherein: the heating medium of the external connecting pipe flows in from the higher position of the external pipe and flows out from the lower position of the external pipe.