Hot air circulation air cooler for CCUS supercritical carbon dioxide compressor

Abstract

The utility model discloses a hot air circulation air cooler for a CCUS supercritical carbon dioxide compressor. The device comprises a framework, and a pipe bundle and a fan are arranged on the framework; a hot air circulation channel is arranged from the air outlet side of the tube bundle to the air inlet side of the fan; an electric air outlet device is arranged on the air outlet side of the tube bundle; an electric air inlet device is arranged on the air inlet side of the fan; an electric air return device is arranged at an air return inlet of the hot air circulation channel; a temperature sensor is arranged on the air inlet side of the tube bundle; a control device is further included. According to the hot air circulation air cooler for the CCUS supercritical carbon dioxide compressor, the temperature of supercritical carbon dioxide can be accurately controlled to be above the critical temperature, the carbon dioxide exists in a supercritical gas phase mode, the situation that equipment is corroded due to the fact that the supercritical carbon dioxide exists in a supercritical liquid phase state can be avoided, and the service life of the equipment is prolonged. And meanwhile, the influence of pulsation characteristic fluctuation on stable operation of the compressor is avoided, and the compressor can operate safely and stably.

Description

Technical Field

[0001] The utility model relates to the technical field of CCUS, and in particular to a hot air circulation air cooler for a CCUS supercritical carbon dioxide compressor. Background Art

[0002] Carbon dioxide gas drive enhanced oil recovery technology is one of the effective measures for large-scale disposal of carbon dioxide, and has become the second largest technology for improving oil recovery. In recent years, with the widespread attention of countries to the reduction of greenhouse gas emissions such as carbon dioxide, carbon dioxide capture, utilization and storage (CCUS) technology has emerged, marking a new stage in the carbon dioxide oil recovery technology combined with greenhouse gas storage. Compressors are required in the capture and pressurization, pipeline transportation, and injection links of the CCUS technology chain. For the gas injection compressor, the final exhaust pressure generally reaches more than 25MPa, and the carbon dioxide in the last two pressure states is in a supercritical state. When the temperature is lower than the critical temperature, carbon dioxide exists in the form of a supercritical liquid phase. The supercritical liquid phase carbon dioxide is very corrosive and will cause corrosion damage and failure of the pipeline; at the same time, in the critical point area, a small amount of temperature change will cause a large change in density, resulting in changes in the speed of sound and fluctuations in pulsation characteristics. Therefore, in order to prevent supercritical carbon dioxide from existing in the supercritical liquid phase and causing corrosion to the equipment, and at the same time avoid the impact of pulsation fluctuations on the stable operation of the compressor, it is very important to accurately control the cooling temperature of supercritical carbon dioxide. If it cannot be accurately controlled, the temperature of supercritical carbon dioxide will easily fall below the critical temperature after cooling, thus placing it in the supercritical liquid phase.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] (1) The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor in the prior art cannot accurately control the cooling temperature of supercritical carbon dioxide and cannot completely prevent supercritical carbon dioxide from existing in a supercritical liquid phase. There is a risk of corrosion damage and failure of equipment caused by supercritical carbon dioxide in a supercritical liquid phase.

[0005] (2) The hot air circulation air cooler used in the CCUS supercritical carbon dioxide compressor in the prior art cannot accurately control the cooling temperature of the supercritical carbon dioxide. In the critical point area, a small temperature change will cause a large change in density, resulting in a change in the speed of sound and fluctuations in the pulsation characteristics, which will in turn cause the compressor to be unable to operate stably. Utility Model Content

[0006] The purpose of the utility model is to provide a hot air circulation air cooler for a CCUS supercritical carbon dioxide compressor to solve the above problems, which can control the air intake from the environment and the hot air outlet and return air volume according to the detection of the inlet air temperature, so as to achieve a stable inlet air temperature, and then accurately control the cooling temperature of the supercritical medium of the supercritical carbon dioxide compressor. The preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects as described below.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model provides a hot air circulation air cooler for a CCUS supercritical carbon dioxide compressor, comprising a frame, a tube bundle and a fan are arranged on the frame, a heat exchange tube is arranged in the tube bundle, and the fan is arranged below the tube bundle; a hot air circulation channel is arranged from the air outlet side of the tube bundle to the air inlet side of the fan, and both ends of the hot air circulation channel are respectively communicated with the air outlet of the tube bundle to the air inlet of the fan;

[0009] The air outlet side of the tube bundle is provided with an electric air outlet device with adjustable air outlet opening size;

[0010] The air inlet side of the fan is provided with an electric air inlet device with adjustable air inlet opening size;

[0011] An electric return air device capable of adjusting the opening of the hot air return air outlet is provided at the return air inlet of the hot air circulation channel;

[0012] A temperature sensor is provided on the air inlet side of the tube bundle;

[0013] It also includes a control device, which is electrically connected to the electric air outlet device, the electric air inlet device, the temperature sensor, and the electric air return device respectively.

[0014] Optionally, the electric air outlet device is an electric air outlet shutter, and the electric air outlet shutter is electrically connected to the control device.

[0015] Optionally, the electric air inlet device is an electric air inlet shutter, and the electric air inlet shutter is electrically connected to the control device.

[0016] Optionally, the electric return air device is an electric return air shutter, and the electric return air shutter is electrically connected to the control device.

[0017] Optionally, the fan is arranged below the tube bundle.

[0018] Optionally, the heat exchange tube is a fin heat exchange tube.

[0019] Optionally, the control device is a PLC.

[0020] Based on the above technical solution, the embodiment of the utility model can at least produce the following technical effects:

[0021] The utility model provides a hot air circulation air cooler for a CCUS supercritical carbon dioxide compressor. When the utility model is in operation, a temperature sensor detects the air temperature of the air inlet of the fan on the air inlet side of the tube bundle. When the air temperature is lower than a preset temperature, the openings of the air inlet on the air inlet side of the fan and the air outlet on the air outlet side of the tube bundle are reduced, and the opening of the return air outlet on the return air side of the hot air circulation channel is increased to reduce the amount of cold air suction and the amount of hot air discharge, increase the amount of hot air return, and raise the temperature of the mixed air to a preset temperature value; when the air temperature is higher than a preset temperature, the openings of the air inlet on the air inlet side of the fan and the air outlet on the air outlet side of the tube bundle are increased, and the opening of the return air outlet on the return air side of the hot air circulation channel is reduced to increase the amount of cold air suction and the amount of hot air discharge, reduce the amount of hot air return, and lower the temperature of the mixed air to a preset temperature value. The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor provided by the utility model has a simple structure, scientific and reasonable design, easy use and high degree of automation. The inlet temperature on the inlet side of the tube bundle is controlled by adjusting the cold air intake volume and the hot air return volume of the fan, and the tube bundle is cooled by controlling the wind at the inlet temperature, so as to achieve accurate control of the post-cooling temperature. The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor provided by the utility model can accurately control the temperature of supercritical carbon dioxide above the critical temperature. Carbon dioxide exists in a supercritical gas phase, which can avoid corrosion to equipment caused by the existence of supercritical carbon dioxide in a supercritical liquid phase state, and at the same time avoid the influence of pulsation characteristic fluctuations on the stable operation of the compressor, so that the compressor can operate safely and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 or the description of the prior art 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.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0024] In the figure: 1. Structure; 2. Fan; 3. Tube bundle; 4. Electric air inlet shutter; 5. Hot air circulation channel; 6. Electric return air shutter; 7. Electric air outlet shutter; 8. Temperature sensor. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0026] like Figure 1 As shown, Figure 1 The direction of arrow a in the figure is the hot air outlet direction on the air outlet side of the tube bundle 3, and the direction of arrow b is the hot air return direction entering the hot air circulation channel 5:

[0027] The utility model provides a hot air circulation air cooler for a CCUS supercritical carbon dioxide compressor, comprising a frame 1, on which a tube bundle 3 and a fan 2 are arranged, and a heat exchange tube is arranged in the tube bundle 3; a hot air circulation channel 5 is arranged from the air outlet side of the tube bundle 3 to the air inlet side of the fan 2, and both ends of the hot air circulation channel 5 are respectively communicated with the air outlet of the tube bundle 3 to the air inlet of the fan 2;

[0028] The air outlet side of the tube bundle 3 is provided with an electric air outlet device with adjustable air outlet opening size;

[0029] The air inlet side of the fan 2 is provided with an electric air inlet device with adjustable air inlet opening size;

[0030] The return air inlet of the hot air circulation channel 5 is provided with an electric return air device with adjustable hot air return air outlet size;

[0031] A temperature sensor 8 is provided on the air inlet side of the tube bundle 3;

[0032] It also includes a control device, which is electrically connected to the electric air outlet device, the electric air inlet device, the temperature sensor 8, and the electric air return device.

[0033] The utility model provides a hot air circulation air cooler for a CCUS supercritical carbon dioxide compressor. When the utility model is in operation, a temperature sensor 8 detects the air temperature of the air inlet of the fan 2 on the air inlet side of the tube bundle 3. When the air temperature is lower than a preset temperature, the openings of the air inlet on the air inlet side of the fan 2 and the air outlet on the air outlet side of the tube bundle 3 are reduced, and the opening of the return air outlet on the return air side of the hot air circulation channel 5 is increased to reduce the amount of cold air suction and the amount of hot air discharge, increase the amount of hot air return, and raise the temperature of the mixed air to a preset temperature value; when the air temperature is higher than a preset temperature, the openings of the air inlet on the air inlet side of the fan 2 and the air outlet on the air outlet side of the tube bundle 3 are increased, and the opening of the return air outlet on the return air side of the hot air circulation channel 5 is reduced to increase the amount of cold air suction and the amount of hot air discharge, reduce the amount of hot air return, and lower the temperature of the mixed air to a preset temperature value. The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor provided by the utility model has a simple structure, a scientific and reasonable design, is easy to use, and has a high degree of automation. The inlet air temperature on the inlet side of the tube bundle 3 is controlled by adjusting the cold air intake volume and the hot air return volume of the fan 2, and the tube bundle 3 is cooled by controlling the wind at the inlet air temperature, so as to achieve accurate control of the post-cooling temperature. The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor provided by the utility model can accurately control the temperature of supercritical carbon dioxide above the critical temperature. Carbon dioxide exists in a supercritical gas phase, which can avoid corrosion to equipment caused by the existence of supercritical carbon dioxide in a supercritical liquid phase state, and at the same time avoid the influence of pulsation characteristic fluctuations on the stable operation of the compressor, so that the compressor can operate safely and stably.

[0034] As an optional embodiment, the electric air outlet device is an electric air outlet shutter 7, and the electric air outlet shutter 7 is electrically connected to the control device. Of course, the electric air outlet device can also be other electric air outlet devices that can adjust the opening size of the air outlet, and the opening can be notified electrically.

[0035] As an optional embodiment, the electric air intake device is an electric air intake shutter 4, and the electric air intake shutter 4 is electrically connected to the control device. Of course, the electric air intake device can also be other electric air intake devices that can adjust the opening size of the air inlet, and the opening can be adjusted electrically.

[0036] As an optional embodiment, the electric return air device is an electric return air louver 6, and the electric return air louver 6 is electrically connected to the control device. Of course, the electric return air device can also be other electric return air devices that can adjust the opening size of the return air outlet, and the opening can be adjusted electrically.

[0037] In this embodiment, there is one temperature sensor 8. Of course, the number of temperature sensors 8 can be set as needed, or multiple.

[0038] As an optional implementation, the fan 2 is arranged below the tube bundle 3 .

[0039] As an optional implementation, the heat exchange tube is a fin heat exchange tube.

[0040] As an optional implementation, the control device is a PLC.

[0041] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention.

Claims

1. A hot air circulation air cooler for a CCUS supercritical carbon dioxide compressor, comprising a frame (1), characterized in that: A tube bundle (3) and a fan (2) are arranged on the frame (1), and a heat exchange tube is arranged in the tube bundle (3); a hot air circulation channel (5) is arranged from the air outlet side of the tube bundle (3) to the air inlet side of the fan (2), and both ends of the hot air circulation channel (5) are respectively connected from the air outlet of the tube bundle (3) to the air inlet of the fan (2); The air outlet side of the tube bundle (3) is provided with an electric air outlet device with adjustable air outlet opening size; The air inlet side of the fan (2) is provided with an electric air inlet device with adjustable air inlet opening size; An electric return air device capable of adjusting the size of the hot air return air outlet is provided at the return air inlet of the hot air circulation channel (5); A temperature sensor (8) is provided on the air inlet side of the tube bundle (3); It also includes a control device, which is electrically connected to the electric air outlet device, the electric air inlet device, the temperature sensor (8), and the electric air return device.

2. The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor according to claim 1, characterized in that: The electric air outlet device is an electric air outlet louver (7), and the electric air outlet louver (7) is electrically connected to the control device.

3. The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor according to claim 1, characterized in that: The electric air inlet device is an electric air inlet shutter (4), and the electric air inlet shutter (4) is electrically connected to the control device.

4. The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor according to claim 1, characterized in that: The electric return air device is an electric return air louver (6), and the electric return air louver (6) is electrically connected to the control device.

5. The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor according to claim 1, characterized in that: The fan (2) is arranged below the tube bundle (3).

6. The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor according to claim 1, characterized in that: The heat exchange tube is a fin heat exchange tube.

7. The hot air circulation air cooler for CCUS supercritical carbon dioxide compressor according to any one of claims 1 to 6, characterized in that: The control device is a PLC.

Images