Heat exchange type conveying pipeline

Abstract

The utility model discloses a heat exchange type conveying pipeline, and mainly relates to the field of oil conveying facilities. Comprising a plurality of heating pipes, the two ends of each heating pipe are respectively and fixedly communicated with heat preservation pipes with the same pipe diameter in a sealed mode, a plurality of heat preservation pipes are arranged between every two adjacent heating pipes, and a circulating pipe is arranged in the middle of the interior of each heating pipe and is a hard pipe which spirally extends in a conical mode in the axis direction of the corresponding heating pipe. One end of the circulating pipe is arranged close to the axis of the circulating pipe and connected with a connecting pipe, and the connecting pipe is used for connecting hot water or hot air. The petroleum pipeline has the beneficial effects that the temperature of flowing petroleum can be quickly and uniformly increased, and the conveying energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the field of petroleum transportation facilities, in particular to a heat exchange type transportation pipeline. Background Art

[0002] The transportation of oil is basically completed by the oil pipeline system, which is mainly composed of oil pipelines, oil stations and other auxiliary related equipment. It is one of the main equipment in the oil storage and transportation industry, and is also the most important transportation equipment for crude oil and oil products. For long-distance oil transportation, it is very important to maintain the appropriate temperature based on the properties of oil (such as freezing point and viscosity), environmental conditions (such as soil temperature) and transportation process requirements. Especially when it is necessary to transport oil products with high freezing point or high viscosity, heating transportation is also a necessary measure.

[0003] In specific applications, there are many ways to insulate or heat the pipeline for transportation. Since long-distance insulation requires more heat energy in low temperature or winter environments, it is necessary to save energy. The commonly used electric heating sleeves consume a lot of electricity, causing transportation costs and energy consumption problems. At the same time, due to the large diameter of the oil pipeline, the fixed-point heating method at the heating station can only heat the pipe wall, and it is difficult to heat the oil flowing through it evenly and thoroughly, resulting in energy waste, and different viscosities cause differences in fluidity, thus affecting transportation. Utility Model Content

[0004] The utility model aims to provide a heat exchange type transmission pipeline, which can realize rapid and uniform temperature increase of the oil flowing through it and reduce the transmission energy consumption.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A heat exchange type transmission pipeline comprises a plurality of heating tubes, both ends of the heating tubes are respectively sealed and fixedly connected with insulation tubes of equal diameter, there are a plurality of insulation tubes between adjacent heating tubes, a circulation tube is centrally arranged inside the heating tube, the circulation tube is a hard tube extending in a conical spiral along the axis direction of the heating tube, one end of the circulation tube is arranged close to the axis thereof and is connected with a connecting tube, the connecting tube is used for receiving hot water or hot air.

[0007] The outer sleeve of the heating tube is provided with a water tank, and the water tank is a rectangular closed box body. A water inlet pipe and a water outlet pipe are respectively provided on the top of the water tank. The water inlet pipe is used to connect to a hot water source. The inner end of the water inlet pipe is connected to a connecting pipe. The end of the circulation pipe away from the connecting pipe is close to the heating tube wall and is connected to a guide pipe. A pipe mouth is provided at the end of the guide pipe, and the pipe mouth is connected to the water tank.

[0008] The insulation pipe is provided with an insulation layer on the outside, and the insulation layer comprises two semicircular arc insulation plates adapted to the circumference of the insulation pipe, and the insulation layer is covered with a skin on the outside.

[0009] A heat equalizing tank is arranged beside the heating pipe, and hot water is filled in the heat equalizing tank. Two connecting pipe heads are arranged on the top of the heat equalizing tank, and the two connecting pipe heads are respectively connected to the water inlet pipe and the water outlet pipe through pipelines with valves.

[0010] The hot water in the equalizing tank comes from hot water recovered from waste heat.

[0011] A waste heat pipe is provided at the bottom of the equalizing tank, and the waste heat pipe is used to connect hot water or hot air recovered by waste heat, and the waste heat pipe is used to heat the hot water in the equalizing tank.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] By setting a circulation pipe inside the heating pipe, the oil flowing through can be directly heated, avoiding the problem of large heat loss caused by heating outside the pipe wall. At the same time, the gradually diffused spiral structure can take care of the oil flowing from the center of the pipe to different positions on the pipe wall. At the same time, by lengthening the heating stroke, the heating capacity is improved and the impact on oil transportation is reduced. Thus, high-efficiency and more uniform heating can be achieved in oil transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model (the internal structure uses dotted lines).

[0015] Figure 2 It is a schematic diagram of the heating tube of the utility model from the perspective of one end of the tube.

[0016] Figure 3 The utility model heating tube is Figure 2 Schematic diagram under the pipe outlet at the opposite end.

[0017] Figure 4 It is a schematic diagram of the internal structure of the utility model.

[0018] Figure 5 It is an overall schematic diagram of the utility model.

[0019] Numbers shown in the accompanying drawings:

[0020] 1. Insulation pipe; 2. Insulation layer; 3. Skin; 4. Heating pipe; 5. Water tank; 6. Water inlet pipe; 7. Water outlet pipe; 8. Circulation pipe; 9. Connecting pipe; 10. Flow guide pipe; 11. Pipe mouth; 12. Heat equalization tank; 13. Connecting pipe head; 14. Waste heat pipe. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0022] The improved pipeline system includes alternately arranged insulation pipes 1 and heating pipes 4. According to the conveying length, a section of heating pipe 4 can be connected after one or more sections of insulation pipes 1, so as to obtain a heating area on the conveying pipeline.

[0023] The two ends of the insulation pipe 1 and the heating pipe 4 are respectively provided with connecting flanges, the butted connecting flanges are fixed by bolts, and rubber gaskets are added to the joint position to strengthen the seal. The connection structure of the above heating pipe 4 and the insulation pipe 1 is consistent with the existing oil pipeline structure.

[0024] The insulation pipe 1 is provided with an insulation layer 2 on the outside, and the insulation layer 2 is pressed into a semicircular arc insulation board adapted to the circumference of the insulation pipe 1 by closed-cell rigid polyurethane foam plastics. The insulation pipe 1 is enclosed by two insulation boards, and the insulation layer 2 is covered with a skin 3 on the outside for protection, so as to achieve enhanced fixation and waterproof heat insulation, so as to effectively maintain the temperature of the pipe body and the internal oil and reduce heat loss.

[0025] The outer sleeve of the heating tube 4 is provided with a water tank 5, which is a rectangular closed box. The box body of the water tank 5 is made of heat-insulating material. The size of the water tank 5 is slightly larger than the heating tube 4. The top of the water tank 5 is provided with a water inlet pipe 6 and a water outlet pipe 7. The water inlet pipe 6 is used to connect to a hot water source.

[0026] A circulation pipe 8 is arranged in the center of the heating pipe 4. The circulation pipe 8 extends in a conical spiral. One end of the circulation pipe 8 is arranged close to its axis, and the other end is away from the axis and extends in a rotation around the axis, so that different positions of the heating pipe 4 are heated at different positions, so that the oil flowing through can be evenly heated and the temperature of the oil flowing through can be quickly increased. In addition, due to the spiral extension, it avoids contact with the oil on the same cross section, reduces the resistance to the fluid, and prolongs the heating stroke.

[0027] A connecting pipe 9 is provided at one end of the circulation pipe 8 close to its axis, and a guide pipe 10 is provided at the other end of the circulation pipe 8. The connecting pipe 9 penetrates the pipe wall of the heating pipe 4 and is connected to the water inlet pipe 6 of the water tank 5. A pipe mouth 11 is provided at one end of the guide pipe 10 away from the circulation pipe 8. The guide pipe 10 penetrates the pipe wall of the heating pipe 4 and the pipe mouth 11 is located on the outer wall of the heating pipe 4, so as to directly guide the hot water into the water tank 5.

[0028] Based on the above structure, the hot water for heating the pipeline first enters the heating tube 4 directly from the water inlet pipe 6, directly heats the oil flowing through, quickly and evenly increases the oil temperature without heat transfer through the tube wall, and then enters the water tank 5 through the guide tube 10 to achieve continuous heating of the tube wall of the heating tube 4, so that the heating tube 4 is always insulated and heated by the hot water in the water tank 5, thereby heating the oil adhering to the wall and maintaining the temperature of the heating tube 4.

[0029] The above heating structure can quickly increase the temperature of the oil. Through the spiral and conically extending circulation pipe 8, the oil of different dimensions on the cross section can be efficiently heated, the heat exchange effect is very good, and the energy loss is reduced.

[0030] The diameter of the heating pipe 4 is consistent with that of the insulation pipe 1, which does not affect the oil transportation, thereby not increasing the energy consumption of oil transportation. Since the laying of oil pipelines is generally limited in height, the above structure can use a smaller water tank 5, combined with flowing hot water to ensure heating capacity.

[0031] A heat equalizing tank 12 is arranged beside the heating pipe 4, which is used for storing hot water, balancing heat source, preheating hot water, etc. The heat equalizing tank 12 is filled with hot water, and two connecting pipes 9 are arranged on the top of the heat equalizing tank 12, which are respectively connected to the water inlet pipe 6 and the water outlet pipe 7 through pipelines with valves, and are used to continuously add hot water to the circulation pipe 8 and the water tank 5 and return hot water to keep the hot water at an appropriate temperature.

[0032] In terms of energy, photovoltaic energy can be used. A photovoltaic panel can be installed on the top of the equalizing tank 12 to transfer heat energy to the hot water in the tank. The photovoltaic panel can also be converted into electrical energy for storage, and an electric heating rod can be installed in the equalizing tank 12 to heat the hot water electrically.

[0033] At the same time, the heat source can be combined with regional conditions and used by waste heat recovery, such as using waste heat from crude oil production, or waste heat from equipment along the way (such as boilers). If the waste heat is hot water and the temperature is suitable, the waste heat can be directly connected to the equalizing tank 12 for hot water replenishment and replacement to provide the required hot water. If the waste heat temperature is high, a waste heat pipe 14 can be provided at the bottom of the equalizing tank 12 to introduce the waste heat fluid into a preheating pipe, and the hot water inside is insulated and heated through the waste heat pipe 14. A valve is provided on the preheating pipe to control it according to the temperature conditions.

[0034] Based on the equalizing tank 12, it can be ensured that the temperature of the hot water used is stable. By continuously circulating the hot water in the circulation pipe 8 and the water tank 5, the heating of the heating pipe 4 and the oil can be ensured.

Claims

1. A heat exchange transmission pipeline, characterized in that: It comprises a plurality of heating tubes, both ends of which are sealed and fixedly connected with insulation tubes of equal diameter, there are a plurality of insulation tubes between adjacent heating tubes, a circulation tube is centrally arranged inside the heating tube, the circulation tube is a hard tube extending in a conical spiral along the axis direction of the heating tube, one end of the circulation tube is arranged close to the axis and is connected with a connecting tube, the connecting tube is used for accessing hot water or hot air.

2. A heat exchange type transmission pipeline according to claim 1, characterized in that: The outer sleeve of the heating tube is provided with a water tank, and the water tank is a rectangular closed box body. A water inlet pipe and a water outlet pipe are respectively provided on the top of the water tank. The water inlet pipe is used to connect to a hot water source. The inner end of the water inlet pipe is connected to a connecting pipe. The end of the circulation pipe away from the connecting pipe is close to the heating tube wall and is connected to a guide pipe. A pipe mouth is provided at the end of the guide pipe, and the pipe mouth is connected to the water tank.

3. A heat exchange transmission pipeline according to claim 1, characterized in that: The insulation pipe is provided with an insulation layer on the outside, and the insulation layer comprises two semicircular arc insulation plates adapted to the circumference of the insulation pipe, and the insulation layer is covered with a skin on the outside.

4. A heat exchange type transmission pipeline according to claim 2, characterized in that: A heat equalizing tank is arranged beside the heating pipe, and hot water is filled in the heat equalizing tank. Two connecting pipe heads are arranged on the top of the heat equalizing tank, and the two connecting pipe heads are respectively connected to the water inlet pipe and the water outlet pipe through pipelines with valves.

5. A heat exchange transmission pipeline according to claim 4, characterized in that: The hot water in the equalizing tank comes from hot water recovered from waste heat.

6. A heat exchange transmission pipeline according to claim 4, characterized in that: A waste heat pipe is provided at the bottom of the equalizing tank, and the waste heat pipe is used to connect hot water or hot air recovered from waste heat, and the waste heat pipe is used to heat the hot water in the equalizing tank.

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