Thermal compensation type freezing and blocking prevention device

Abstract

The utility model discloses a thermal compensation type freezing and blocking prevention device which comprises a main pipe section, a first bypass pipeline and a second bypass pipeline, the main pipe section comprises a high-pressure pipe section and a low-pressure pipe section which are communicated in sequence, a heat exchanger and a pressure reducing device are arranged on the high-pressure pipe section in sequence, and a heat regenerator is arranged on the first bypass pipeline. A circulating pump is arranged on the second bypass pipeline, a first electromagnetic temperature sensing valve is arranged on the low-pressure pipe section, a second electromagnetic temperature sensing valve is arranged on the high-pressure pipe section, and the first electromagnetic temperature sensing valve and the second electromagnetic temperature sensing valve are located on the two sides of the pressure reducing device respectively. According to the ice blockage prevention device, the first bypass pipeline and the second bypass pipeline are connected to the main pipe section, so that the ice blockage prevention device has three operation modes, the bypass pipelines can be effectively used for transferring heat of a working medium in a system by flexibly switching the three operation modes, the possibility of occurrence of the freezing blockage problem is reduced through cold and heat adjustment in the system, and the ice blockage prevention device is suitable for large-scale popularization and application. And the operation stability of the system is also improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipeline anti-freezing and anti-blocking technical field, concretely relates to a heat compensation formula frozen block prevention device. BACKGROUND

[0002] Under the background of double carbon, the related technology of carbon dioxide system has been widely developed and applied in recent years. The main function is to use the excellent physical and chemical properties of carbon dioxide, an environmentally friendly working medium, to provide combined cold, heat and electricity supply and energy storage, as a beneficial attempt to address energy and environmental crises. When the carbon dioxide system is working, carbon dioxide is driven by the compressor set, enters the heat exchanger through the inlet pipe, and exchanges heat. However, in this process, due to factors such as excessively low external temperature and excessive water vapor content in the carbon dioxide system, frozen blockage often occurs in the pressure reducer, pipe collection area and other intervals. The system pressure may be abnormal, the refrigeration efficiency may be reduced, and in severe cases, the equipment may be damaged, causing safety accidents.

[0003] Existing prevention technologies mainly include electric heat tracing, hot water dredging, blowing dredging and other related technologies. These technologies mainly rely on external equipment to resolve frozen blockage, often require external energy for equipment power supply, and have low response efficiency. The formation time of frozen blockage in the carbon dioxide system is rapid, and the accident is likely to expand, which is underestimated. Therefore, a carbon dioxide ice blockage prevention device with reasonable design is needed, which can effectively utilize the system's own adjustment capability, provide heat compensation for the system at key nodes, quickly respond to accident conditions, reduce the frequency of frozen blockage accidents, reduce the harm of frozen blockage accidents, and improve the safety and stability of the system operation. INVENTION CONTENTS

[0004] The technical problem to be solved by the utility model is to provide a heat compensation formula frozen blockage prevention device, which has three operating modes, can effectively utilize the bypass pipe to mobilize the heat of the working medium inside the system, and can reduce the possibility of frozen blockage and improve the stability of the system operation by adjusting the cold and heat inside the system through flexible switching of the three operating modes.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of a heat compensation formula frozen blockage prevention device, characterized by comprising a main pipe section, a first bypass pipe and a second bypass pipe connected to the main pipe section, the main pipe section comprising a high-pressure pipe section and a low-pressure pipe section connected in sequence, the high-pressure pipe section being provided with a heat exchanger and a pressure reducing device in sequence from the inlet end to the outlet end, the first bypass pipe being provided with a regenerator, and the second bypass pipe being provided with a circulating pump.

[0006] One end of the first bypass pipeline is connected to the inlet end of the high-pressure pipe section, and the other end of the first bypass pipeline is connected to the inlet end of the heat exchanger.

[0007] One end of the second bypass pipeline is connected to the inlet end of the high-pressure pipe section, and the other end of the second bypass pipeline is connected to the low-pressure pipe section.

[0008] The first electromagnetic temperature sensing valve is arranged on the low-pressure pipe section, and the second electromagnetic temperature sensing valve is arranged on the high-pressure pipe section.

[0009] The heat compensation type frozen blocking prevention device has the advantages that the three-way valve is arranged on the high-pressure pipe section for connecting the second bypass pipeline, and one end of the first bypass pipeline is connected to the high-pressure pipe section between the heat exchanger and the three-way valve.

[0010] The heat compensation type frozen blocking prevention device has the advantages that the first throttling valve is arranged on the first bypass pipeline, and the first throttling valve is arranged close to the high-pressure pipe section.

[0011] The heat compensation type frozen blocking prevention device has the advantages that the second throttling valve is arranged on the second bypass pipeline, and the second throttling valve is arranged close to the low-pressure pipe section.

[0012] The heat compensation type frozen blocking prevention device has the advantages that the pipe diameter of the high-pressure pipe section is greater than that of the low-pressure pipe section, and the high-pressure pipe section and the low-pressure pipe section are connected in communication through the tapered pipe section.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1、 the utility model discloses a first bypass pipeline is connected on the main pipe section, and the heat exchanger is arranged on the first bypass pipeline, can make a part of gas on the main pipe section heat through the heat exchanger on the first bypass pipeline, complete gas reheating process, improve temperature to standard interval, finally enter the heat exchanger on the high-pressure pipe section and carry out heat supply, improve the gas temperature before pressure reducing device, reduce frozen blocking risk.

[0015] 2、 the utility model discloses a second bypass pipeline is connected on the main pipe section, and the circulating pump is arranged on the second bypass pipeline, can make a part of gas on the main pipe section heat through the circulating pump on the second bypass pipeline, finally according to standard control flow enters the low-pressure pipe section frozen blocking easy area and completes heat supply, reduces frozen blocking risk.

[0016] 3. This utility model installs a first electromagnetic temperature sensing valve on the low-pressure pipe section and a second electromagnetic temperature sensing valve on the high-pressure pipe section. When ice blockage occurs, the pressure reducing device, namely the first and second electromagnetic temperature sensing valves before and after the ice blockage-prone area, closes instantly, which can effectively isolate and control the ice blockage area and prevent it from further expanding and extending to the system heat exchange device, causing mechanical damage.

[0017] In summary, by connecting a first bypass pipe and a second bypass pipe to the main pipe section, this utility model enables the ice blockage prevention device to have three operating modes. By flexibly switching between the three operating modes, the bypass pipe can effectively utilize the heat of the working fluid inside the system to adjust the temperature within the system, thereby reducing the possibility of freezing and blockage and improving the stability of system operation.

[0018] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1—High-pressure pipe section; 2—Three-way valve; 3—First throttle valve;

[0022] 4—Regenerator; 5—First bypass pipe; 6—Heat exchanger;

[0023] 7—Low-pressure pipe section; 8—Pressure reducing device; 9—First electromagnetic temperature sensing valve;

[0024] 10—Second electromagnetic temperature sensing valve; 11—Second bypass pipeline; 12—Circulation pump;

[0025] 13—Second throttle valve. Detailed Implementation

[0026] like Figure 1 As shown, the present invention includes a main pipe section, a first bypass pipe 5 and a second bypass pipe 11 connected to the main pipe section. The main pipe section includes a high-pressure pipe section 1 and a low-pressure pipe section 7 connected in sequence. A heat exchanger 6 and a pressure reducing device 8 are arranged in sequence from the inlet end to the outlet end on the high-pressure pipe section 1. A regenerator 4 is arranged on the first bypass pipe 5. A circulation pump 12 is arranged on the second bypass pipe 11.

[0027] One end of the first bypass pipe 5 is connected to the inlet end of the high-pressure pipe section 1, and the other end of the first bypass pipe 5 is connected to the inlet end of the heat exchanger 6.

[0028] One end of the second bypass pipeline 11 is connected to the inlet end of the high-pressure pipe section 1, and the other end of the second bypass pipeline 11 is connected to the low-pressure pipe section 7;

[0029] The low-pressure pipe section 7 is provided with a first electromagnetic temperature sensing valve 9, and the high-pressure pipe section 1 is provided with a second electromagnetic temperature sensing valve 10. The first electromagnetic temperature sensing valve 9 and the second electromagnetic temperature sensing valve 10 are respectively located on the two sides of the pressure reducing device 8;

[0030] The first electromagnetic temperature sensing valve 9 is located between the connection of the second bypass pipeline 11 and the low-pressure pipe section 7 and the pressure reducing device 8, and the second electromagnetic temperature sensing valve 10 is located between the heat exchanger 6 and the pressure reducing device 8.

[0031] In actual use, by connecting the first bypass pipeline 5 to the main pipe section and arranging the regenerator 4 on the first bypass pipeline 5, a part of the gas on the main pipe section can be heated by the regenerator 4 on the first bypass pipeline 5 to complete the gas reheating process, improve the temperature to the standard interval, and finally enter the heat exchanger 6 located on the high-pressure pipe section 1 to supplement heat and improve the gas temperature before the pressure reducing device 8 to reduce the risk of freezing.

[0032] It should be noted that by connecting the second bypass pipeline 11 to the main pipe section and arranging the circulating pump 12 on the second bypass pipeline 11, a part of the gas on the main pipe section can be powered by the circulating pump 12 on the second bypass pipeline 11, and finally enter the low-pressure pipe section freezing-prone area to complete heat supply according to the standard control flow to reduce the risk of freezing.

[0033] In specific implementation, by arranging the first electromagnetic temperature sensing valve 9 on the low-pressure pipe section 7 and the second electromagnetic temperature sensing valve 10 on the high-pressure pipe section 1, when the ice blockage occurs for the first time, the first electromagnetic temperature sensing valve 9 and the second electromagnetic temperature sensing valve 10 before and after the pressure reducing device 8, which is the ice blockage-prone area, are instantaneously closed, which can effectively isolate and control the ice blockage interval to avoid further expansion and extension to the system heat exchange device to cause mechanical damage.

[0034] In specific implementation, by connecting the first bypass pipeline 5 and the second bypass pipeline 11 to the main pipe section respectively, the ice blockage prevention device has three operating modes. By flexibly switching between the three operating modes, the bypass pipeline can effectively mobilize the heat of the working medium inside the system, and through the cold and hot adjustment inside the system, the possibility of freezing problem can be reduced, and the stability of the system operation is also improved.

[0035] The first operating mode is cooperatively operated by the main pipe section, the first bypass pipeline 5 and the second bypass pipeline 11, the second operating mode is cooperatively operated by the main pipe section and the first bypass pipeline 5, and both the first mode and the second mode can effectively prevent freezing; the third operating mode is cooperatively operated by the main pipe section and the second bypass pipeline 11, which is an accident stress mode and is suitable for use in the event of a serious ice blockage accident.

[0036] In the embodiment, the high-pressure pipe section 1 is provided with a three-way valve 2 for connecting the second bypass pipe 11, and one end of the first bypass pipe 5 is connected to the high-pressure pipe section 1 between the heat exchanger 6 and the three-way valve 2.

[0037] In the embodiment, the first bypass pipe 5 is further provided with a first throttle valve 3, and the first throttle valve 3 is arranged close to the high-pressure pipe section 1.

[0038] In the embodiment, the second bypass pipe 11 is further provided with a second throttle valve 13, and the second throttle valve 13 is arranged close to the low-pressure pipe section 7.

[0039] In the embodiment, the pipe diameter of the high-pressure pipe section 1 is larger than that of the low-pressure pipe section 7, and the high-pressure pipe section 1 and the low-pressure pipe section 7 are connected in communication through a tapered pipe section.

[0040] In actual use, in the first operating mode, after the carbon dioxide working medium enters the high-pressure pipe section 1, a part of the high-temperature and high-pressure carbon dioxide gas enters the second bypass pipe 11 below the three-way valve 2, is supplemented with power by the circulating pump 12, enters the second throttle valve 13, and finally enters the low-pressure pipe section freeze blocking prone area according to the standard control flow to complete heat supply; a part of the high-temperature and high-pressure carbon dioxide gas enters the upper first bypass pipe 5 on the right side of the three-way valve 2, enters the regenerator 4 through the first throttle valve 3, completes the gas reheating process, improves the temperature to the standard interval, and finally enters the heat exchanger 6 located on the high-pressure pipe section 1 to supply heat, improve the gas temperature before the pressure reducing device 8, and reduce the freeze blocking risk; the main airflow enters the pressure reducing device 8 after entering the heat exchanger 6 through the main pipe section front high-pressure pipe section 1, and enters the low-pressure pipe section 7, and the pipe diameter of the connection between the high-pressure pipe section and the low-pressure pipe section is narrowed to accelerate the airflow speed; the three pipes jointly act to prevent freeze blocking.

[0041] In the second operating mode, the main pipe and the first bypass pipe 5 cooperate to operate, and are suitable for operating when the system high-pressure pipe section gas temperature is lower than the standard value. A part of the high-temperature and high-pressure carbon dioxide gas enters the upper first bypass pipe 5 on the right side of the three-way valve 2, enters the regenerator 4 through the first throttle valve 3, completes the gas reheating process, improves the temperature to the standard interval, and finally enters the heat exchanger 6 located on the high-pressure pipe section 1 to supply heat, improve the gas temperature before the pressure reducing device 8, and reduce the freeze blocking risk; the main airflow enters the pressure reducing device 8 after entering the heat exchanger 6 through the main pipe section front high-pressure pipe section 1, and enters the low-pressure pipe section 7, and the pipe diameter of the connection between the high-pressure pipe section and the low-pressure pipe section is narrowed to accelerate the airflow speed. This mode needs to increase the power of the regenerator 4 to ensure the heat compensation strength.

[0042] In the third operating mode, the main pipeline and the second bypass pipeline 11 cooperate to operate, which is suitable for the occurrence of serious ice blockage accident. In this state, the first bypass pipeline 5 and the high-pressure pipe section 1 on the right side of the three-way valve 2 stop operating. The high-temperature and high-pressure incoming gas directly enters the second bypass pipeline 11 through the three-way valve 2 on the main pipe section, enters the low-pressure pipe section after being powered by the circulating pump 12 and passing through the second throttle valve 13, bypasses the ice blockage area to enter the subsequent link of the system, and guarantees the idle speed operation of the system to avoid the occurrence of shutdown accident. At the same time, when the ice blockage occurs for the first time, the pressure reducing device 8, namely the first electromagnetic temperature sensing valve 9 and the second electromagnetic temperature sensing valve 10 before and after the ice blockage prone area, is instantaneously closed to isolate and control the ice blockage area, so as to avoid the further expansion and extension of the ice blockage area to the heat exchange device of the system and cause mechanical damage.

[0043] The above is only a preferred embodiment of the present application, and does not limit the present application. Any simple modification, change and equivalent structural change of the above embodiment according to the technical essence of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A thermally compensated freeze-blocking prevention device, characterized in that: It includes a main pipe section, a first bypass pipe (5) connected to the main pipe section, and a second bypass pipe (11). The main pipe section includes a high-pressure pipe section (1) and a low-pressure pipe section (7) connected in sequence. A heat exchanger (6) and a pressure reducing device (8) are installed in sequence from the inlet end to the outlet end on the high-pressure pipe section (1). A regenerator (4) is installed on the first bypass pipe (5), and a circulating pump (12) is installed on the second bypass pipe (11). One end of the first bypass pipe (5) is connected to the inlet end of the high-pressure pipe section (1), and the other end of the first bypass pipe (5) is connected to the inlet end of the heat exchanger (6). One end of the second bypass pipe (11) is connected to the inlet end of the high-pressure pipe section (1), and the other end of the second bypass pipe (11) is connected to the low-pressure pipe section (7); The low-pressure pipe section (7) is provided with a first electromagnetic temperature sensing valve (9), and the high-pressure pipe section (1) is provided with a second electromagnetic temperature sensing valve (10). The first electromagnetic temperature sensing valve (9) and the second electromagnetic temperature sensing valve (10) are located on both sides of the pressure reducing device (8).

2. The thermal compensation type freeze-blocking prevention device according to claim 1, characterized in that: The high-pressure pipe section (1) is provided with a three-way valve (2) for connecting the second bypass pipe (11), and one end of the first bypass pipe (5) is connected to the high-pressure pipe section (1) between the heat exchanger (6) and the three-way valve (2).

3. A thermally compensated freeze-blocking prevention device according to claim 1, characterized in that: A first throttle valve (3) is also provided on the first bypass pipeline (5), and the first throttle valve (3) is located near the high-pressure pipeline section (1).

4. A thermally compensated freeze-blocking prevention device according to claim 1, characterized in that: A second throttle valve (13) is also provided on the second bypass pipeline (11), and the second throttle valve (13) is located near the low-pressure pipeline section (7).

5. A thermally compensated freeze-blocking prevention device according to claim 1, characterized in that: The diameter of the high-pressure pipe section (1) is larger than that of the low-pressure pipe section (7), and the high-pressure pipe section (1) and the low-pressure pipe section (7) are connected by a tapering pipe section.

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