Pipeline heat preservation and heating system

Abstract

The utility model belongs to the technical field of pipeline heat preservation, and discloses a pipeline heat preservation heating system which comprises a pipeline, a heat preservation box, a water storage box, a heat pump circulation device and a ground control center. The multiple heat preservation boxes are sequentially installed on the outer side wall of the pipeline according to preset intervals. Each heat preservation box is internally provided with a heating pipe and a temperature sensor, the heating pipes and the temperature sensors are installed on the outer side wall of the pipeline, the heating pipes are spirally wound on the outer side wall of the pipeline, and the temperature sensors are in communication connection with the ground control center through a communication module; the water storage tank and the heating pipe are communicated with the heat pump circulating device through connecting pipelines; the top of each heat preservation box is further provided with a solar panel, and the heat pump circulating device and the temperature sensor are both electrically connected with the solar panels. According to the technical scheme, the pipeline can be continuously heated, and the comprehensive energy utilization coefficient of the system is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline thermal insulation, in particular to a pipeline thermal insulation heating system. Background Art

[0002] In industries such as petroleum, petrochemicals, and chemicals, pipelines need to operate at a maintained temperature (higher than the ambient temperature, the specific temperature reached by the medium or process materials in equilibrium under specified design conditions). If only insulation measures are taken, no matter how thick the insulation is, the temperature of the pipeline will eventually drop to the ambient temperature because of heat loss.

[0003] Traditional insulated pipes only have an insulation function, but not a heating function. Therefore, traditional insulated pipes cannot transport media that are solidified at room temperature. In a low-temperature environment, the viscosity of petroleum or similar liquids in oil or liquid pipelines will increase due to the drop in temperature, and the resistance to liquid transportation will also increase significantly, affecting the efficiency of oil or liquid transportation, such as heavy oil, high-condensation oil, fuel heavy oil, and coal tar. In order to ensure the normal operation of oil or liquid pipelines, it is necessary to heat and insulate the pipelines to ensure that the temperature of the liquid in the pipeline is maintained above a certain temperature. The existing pipeline heating and insulation method generally uses electric heating belts or electric heating films to wrap around the outer surface of the pipeline, and then lays a layer of insulation layer outside the electric heating belts or electric heating films. The heating of the electric heating belts or electric heating films can achieve the effect of heating and insulating the oil or liquid pipelines, but it has the problems of slow heating effect, high power consumption, and low energy utilization rate due to large losses. Utility Model Content

[0004] The purpose of the utility model is to provide a pipeline insulation and heating system to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides a pipeline insulation and heating system, including a pipeline, an insulation box, a water storage tank, a heat pump circulation device and a ground control center;

[0006] A plurality of the heat preservation boxes are provided, and each of the heat preservation boxes is sequentially installed on the outer wall of the pipeline at preset intervals; a heating pipe and a temperature sensor are provided in each of the heat preservation boxes, and the heating pipe and the temperature sensor are both installed on the outer wall of the pipeline, and the heating pipe is spirally wound on the outer wall of the pipeline, and the temperature sensor is connected to the ground control center through a communication module;

[0007] The water storage tank and the heating pipe are both connected to the heat pump circulation device through a connecting pipeline; a solar panel is also installed on the top of each insulation box, and the heat pump circulation device and the temperature sensor are both electrically connected to the solar panel.

[0008] Optionally, a water level monitoring device is installed in the water tank, the water level monitoring device is electrically connected to the solar panel, and the water level monitoring device is communicatively connected to the ground control center via the communication module.

[0009] Optionally, the water level monitoring device adopts a water level sensor.

[0010] Optionally, the heat pump circulation device includes an evaporator, an expander, a regenerator, a first compressor and an air cooler unit;

[0011] The air cooler unit is connected to the inlet of the expander through the subcooling side of the regenerator, the outlet of the expander is connected to the inlet of the evaporator, and the outlet of the evaporator is connected to the air cooler unit through the superheating side of the regenerator;

[0012] The air cooler unit includes a plurality of first air coolers and second air coolers connected in sequence, each air cooler is connected one-to-one with each insulation box in the same arrangement order, each air cooler is provided with a heat absorption side inlet and a heat absorption side outlet, and the heat absorption side inlet and the heat absorption side outlet are respectively connected to the two ends of the corresponding heating pipe; the heat absorption side inlet of each air cooler is also connected to the outlet of the water storage tank.

[0013] Optionally, the heat pump circulation device further includes a booster pump, and the booster pump is installed at the heat absorption side inlet of each air cooler, and the heat absorption side inlet is connected to the outlet of the water storage tank and the heating pipe respectively through the booster pump.

[0014] Optionally, the heat pump circulation device also includes a compressor unit, which includes a first compressor and a second compressor, the first air cooler is connected to the inlet of the expander through the subcooling side of the regenerator, the first air cooler is connected to the second air cooler through the second compressor, and the second air cooler is connected to the superheating side of the regenerator through the first compressor.

[0015] Optionally, the communication module includes one or more of a LoRa module, a 2.5G communication module, a 3G communication module, a 4G communication module, and a 5G communication module.

[0016] Optionally, a positioning module is also integrated inside the communication module, and the positioning module includes any one of a GPS positioning module and a Beidou positioning module.

[0017] The technical effects of the utility model are:

[0018] The utility model can sustainably heat the pipeline. By arranging the insulation boxes with heat preservation and heat insulation performance at set intervals, the thickness of the insulation layer of the pipe body itself can be greatly reduced, and the utilization rate of the construction space can be effectively improved. By adopting the setting of connecting the spiral pipeline with the heat pump circulation device, the pipeline can be quickly heated. The working fluid of the heat pump circulation device adopts carbon dioxide, combined with solar power supply, which improves the comprehensive energy utilization coefficient of the system. The heat pump circulation device adopts a regenerator, which efficiently utilizes the working fluid with a higher temperature after the air cooler releases heat, increases the temperature before compression, and improves the performance of the heat pump system. The large temperature sliding characteristics of heat exchange in the air cooler are fully utilized to increase the heating temperature of the heat pump, enhance the thermal matching performance of the air cooler, and reduce heat exchange losses.

[0019] The utility model can carry out real-time monitoring during the pipeline heating process, and combined with wireless transmission, it is convenient for the staff to understand the situation at any time and avoid wasting manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a structural schematic diagram of the pipeline thermal insulation and heating system in an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of a heat pump circulation device in an embodiment of the utility model;

[0024] Explanation of reference numerals: 1. Pipeline; 2. Water storage tank; 3. Heat pump circulation device; 4. Insulation box; 5. Solar panel; 6. Evaporator; 7. Expander; 8. Regenerator; 9. First compressor; 10. Second compressor; 11. First air cooler; 12. Second air cooler. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element in the middle; when an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element in the middle at the same time; the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only;

[0028] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] Embodiment 1

[0032] like Figure 1 - Figure 2 As shown, a pipeline insulation and heating system is provided in this embodiment, including a pipeline 1, an insulation box, a water storage tank 2, a heat pump circulation device 3 and a ground control center; a plurality of insulation boxes are provided, and each of the insulation boxes is installed on the outer wall of the pipeline 1 in sequence according to preset intervals; a heating pipe and a temperature sensor are provided in each of the insulation boxes, and the heating pipe and the temperature sensor are both installed on the outer wall of the pipeline 1, and the heating pipe is spirally wound on the outer wall of the pipeline 1, and the temperature sensor is communicatively connected with the ground control center through a communication module; the water storage tank 2 and the heating pipe are connected to the heat pump circulation device 3 through a connecting pipeline; a solar panel 5 is also installed on the top of each of the insulation boxes, and the heat pump circulation device 3 and the temperature sensor are electrically connected to the solar panel 5.

[0033] This embodiment can continuously heat the pipeline. By arranging an insulation box with thermal insulation performance at set intervals, the thickness of the insulation layer of the pipe body itself can be greatly reduced, which can effectively improve the utilization rate of the construction space; by adopting the setting of connecting the spiral pipeline with the heat pump circulation device 3, the pipeline can be quickly heated; the working fluid of the heat pump circulation device 3 adopts carbon dioxide, combined with solar power supply, which improves the comprehensive energy utilization coefficient of the system; the heat pump circulation device 3 adopts a regenerator 8, which efficiently utilizes the working fluid with a higher temperature after the air cooler releases heat, increases the temperature before compression, and improves the performance of the heat pump system; fully utilizes the large temperature sliding characteristics of heat exchange in the air cooler, increases the heating temperature of the heat pump, enhances the thermal matching performance of the air cooler, and reduces heat exchange losses;

[0034] This embodiment can perform real-time monitoring during the pipeline heating process, combined with wireless transmission, so that the staff can understand the situation at any time and avoid wasting manpower.

[0035] It is feasible that a water level monitoring device is installed in the water storage tank 2, the water level monitoring device is electrically connected to the solar panel 5, and the water level monitoring device is connected to the ground control center through the communication module; the water level monitoring device uses a water level sensor. The solar panel 5 is connected to a battery, and the fault tolerance of the system is improved by setting a backup power supply; the solar panel 5 or the battery is electrically connected to each device in this embodiment.

[0036] It can be implemented that the heat pump circulation device 3 includes an evaporator 6, an expander 7, a regenerator 8, a first compressor 9 and an air cooler unit; the air cooler unit is connected to the inlet of the expander 7 through the supercooling side of the regenerator 8, the outlet of the expander 7 is connected to the inlet of the evaporator 6, and the outlet of the evaporator 6 is connected to the air cooler unit through the superheating side of the regenerator 8; the air cooler unit includes a plurality of first air coolers 11 and second air coolers 12 connected in sequence, each air cooler is connected one-to-one with each of the insulation boxes in the same arrangement order, each of the air coolers is provided with a heat absorption side inlet and a heat absorption side outlet, and the heat absorption side inlet and the heat absorption side outlet are respectively connected to the two ends of the corresponding heating pipe; the heat absorption side inlet of each air cooler is also connected to the outlet of the water storage tank 2.

[0037] It is feasible that the heat pump circulation device 3 also includes a booster pump, and the booster pump is installed at the heat absorption side inlet of each air cooler, and the heat absorption side inlet is connected to the outlet of the water storage tank 2 and the heating pipe respectively through the booster pump.

[0038] It is feasible that the heat pump circulation device 3 also includes a compressor unit, which includes a first compressor 9 and a second compressor 10. The first air cooler 11 is connected to the inlet of the expander 7 through the subcooling side of the regenerator 8, the first air cooler 11 is connected to the second air cooler 12 through the second compressor 10, and the second air cooler 12 is connected to the superheating side of the regenerator 8 through the first compressor 9; an air cooler is arranged between the first compressor 9 and the second compressor 10 to make full use of the high-temperature heat of the working fluid at the outlet of the first compressor 9, reduce the temperature of the second compressor 10, and improve the compressor efficiency.

[0039] The specific implementation process of the heat pump circulation device 3 is as follows: After the low-temperature and low-pressure working fluid is heated by the regenerator 8, it is compressed by the first compressor 9 to become a medium-pressure and high-temperature working fluid. The high-temperature working fluid leaving the first compressor 9 enters the second air cooler 12 to release heat, and the temperature is reduced. It is compressed to high temperature and high pressure by the second compressor 10, and enters the first air cooler 11 to release heat, and the temperature is reduced. The high-pressure working fluid leaving the air cooler unit releases heat in the regenerator 8, and the temperature is further reduced. It enters the expander 7 to output work, and the working fluid temperature and pressure are reduced. It enters the evaporator 6 to absorb heat from the low-temperature heat source and returns to the starting point of the cycle;

[0040] The expander 7 is used to replace the throttle valve to recover the energy of the expansion process, reduce the throttling loss, and improve the performance of the heat pump system; this embodiment fully utilizes the large temperature glide characteristics of heat exchange in the air cooler, increases the heating temperature of the heat pump, enhances the thermal matching performance of the air cooler, and reduces the heat exchange loss;

[0041] Heat exchange process: the water leaving the water storage tank 2 is divided into two streams, and enters the first air cooler 11 and the second air cooler 12 respectively to absorb heat and heat up. The heated water enters the heating pipe in the corresponding heating box to heat the pipeline 1. After heating, it is mixed with the supplementary water source. The mixed water enters the air cooler to absorb heat and proceed to the next cycle. In the process of heat exchange and heating, the temperature of the corresponding pipe section is monitored in real time by the temperature sensor, and the real-time temperature data is uploaded to the control center. Based on the real-time temperature data, each device is controlled to keep warm or heat up, and the water level in the water storage tank 2 is monitored in real time.

[0042] It can be implemented that the communication module includes one or more of a LoRa module, a 2.5G communication module, a 3G communication module, a 4G communication module, and a 5G communication module; a positioning module is also integrated inside the communication module, and the positioning module includes any one of a GPS positioning module and a Beidou positioning module.

[0043] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A pipeline insulation and heating system, characterized in that: It comprises a pipeline (1), a heat preservation box, a water storage tank (2), a heat pump circulation device (3) and a ground control center; A plurality of heat preservation boxes are provided, each of which is sequentially installed on the outer wall of the pipeline (1) at preset intervals; a heating pipe and a temperature sensor are provided in each of the heat preservation boxes, the heating pipe and the temperature sensor are both installed on the outer wall of the pipeline (1), and the heating pipe is spirally wound on the outer wall of the pipeline (1); the temperature sensor is connected to the ground control center through a communication module; The water storage tank (2) and the heating pipe are both connected to the heat pump circulation device (3) via a connecting pipeline; a solar panel (5) is also installed on the top of each of the heat preservation boxes, and the heat pump circulation device (3) and the temperature sensor are both electrically connected to the solar panel (5).

2. A pipeline insulation and heating system according to claim 1, characterized in that: A water level monitoring device is installed in the water storage tank (2), the water level monitoring device is electrically connected to the solar panel (5), and the water level monitoring device is communicatively connected to the ground control center via the communication module.

3. A pipeline insulation and heating system according to claim 2, characterized in that: The water level monitoring device adopts a water level sensor.

4. A pipeline insulation and heating system according to claim 1, characterized in that: The heat pump circulation device (3) comprises an evaporator (6), an expander (7), a regenerator (8), a first compressor (9) and an air cooler unit; The air cooler unit is connected to the inlet of the expander (7) through the subcooling side of the regenerator (8), the outlet of the expander (7) is connected to the inlet of the evaporator (6), and the outlet of the evaporator (6) is connected to the air cooler unit through the superheating side of the regenerator (8); The air cooler unit comprises a plurality of first air coolers (11) and second air coolers (12) connected in sequence, each air cooler being connected one-to-one with each of the heat preservation boxes in the same arrangement order, each of the air coolers being provided with a heat absorption side inlet and a heat absorption side outlet, the heat absorption side inlet and the heat absorption side outlet being respectively connected to the two ends of the corresponding heating pipe; the heat absorption side inlet of each of the air coolers is also connected to the outlet of the water storage tank (2).

5. A pipeline insulation and heating system according to claim 4, characterized in that: The heat pump circulation device (3) also includes a booster pump, which is installed at the heat absorption side inlet of each air cooler, and the heat absorption side inlet is connected to the outlet of the water storage tank (2) and the heating pipe respectively through the booster pump.

6. A pipeline insulation and heating system according to claim 4, characterized in that: The heat pump circulation device (3) also includes a compressor unit, which includes a first compressor (9) and a second compressor (10); the first air cooler (11) is connected to the inlet of the expansion machine (7) through the subcooling side of the regenerator (8); the first air cooler (11) is connected to the second air cooler (12) through the second compressor (10); and the second air cooler (12) is connected to the superheating side of the regenerator (8) through the first compressor (9).

7. The pipeline insulation and heating system according to claim 1, characterized in that: The communication module includes one or more of a LoRa module, a 2.5G communication module, a 3G communication module, a 4G communication module, and a 5G communication module.

8. A pipeline insulation and heating system according to claim 7, characterized in that: The communication module is also internally integrated with a positioning module, and the positioning module includes any one of a GPS positioning module and a Beidou positioning module.

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