Air-cooled air compressor winter and summer dual-mode operation and waste heat recovery device
By using the dual-mode operation of the air-cooled air compressor in winter and summer and the waste heat recovery device, the problems of insufficient heating and waste heat of the air-cooled air compressor in winter are solved, realizing the effective utilization of waste heat and flexible switching of the system to adapt to the environmental needs of different seasons.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
- Filing Date
- 2026-06-04
- Publication Date
- 2026-07-03
Smart Images
Figure CN122329048A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of coking waste heat utilization technology, and specifically relates to a device for dual-mode operation of air-cooled air compressor in winter and summer and waste heat recovery. Background Technology
[0002] In the coking industry, air compressor stations are the supply stations for compressed air in coking production. Due to the shortage of cooling water in some plant areas, air-cooled air compressors are used instead of water-cooled air compressors. Air-cooled air compressors are widely used in water-scarce areas of western China. Large air-cooled units can have an air intake volume of up to 100,000 m³ / h. 3 In winter, relying solely on the air compressor to draw air indoors results in a large volume of cooling air that cannot meet indoor heating requirements. Furthermore, the direct exhaust of cooled hot air outdoors wastes a significant amount of heat generated during compression. In summer, indoor temperatures are high, eliminating the need for heating. The air compressor can draw air directly indoors, and the old process could not switch between winter and summer modes.
[0003] Currently, many regions are facing difficulties in winter heating, with insufficient hot water and steam. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a device and method for dual-mode operation of air-cooled air compressor in winter and summer and waste heat recovery, so as to solve the problems of insufficient indoor heating in winter, waste of waste heat and inability to flexibly switch seasonal operation modes in the prior art.
[0005] To achieve the above objectives, the present invention employs the following technical solution: A dual-mode operation device for winter and summer air-cooled air compressors and waste heat recovery system includes an indoor air-cooled air compressor. The compressed air outlet of the air-cooled air compressor is sequentially connected to a refrigerated dryer and an air storage tank. The air-cooled air compressor has an indoor air intake port. The air inlet of the air-cooled air compressor is connected to an outdoor air intake duct. The exhaust port of the air-cooled air compressor is connected to an exhaust duct. The exhaust duct is equipped with a damper. The exhaust duct is connected to a hot air exhaust duct and a heat exchange duct. The hot air exhaust duct is equipped with a first shut-off valve. The heat exchange duct is equipped with a second shut-off valve. A gas-water heat exchanger is connected to the heat exchange duct. The gas-side inlet of the gas-water heat exchanger is connected to the heat exchange duct, and the gas-side outlet is open to the atmosphere. The water-side inlet and outlet of the gas-water heat exchanger are connected to the coking plant's production water supply pipeline. Preheated water is circulated in the coking plant's production water supply pipeline. The air storage tank is connected to a dry quenching coke supply system. The device employs a dual-mode operation and waste heat recovery method, including both winter and summer operation modes. Winter operating mode: 1. Airflow switching: Open the outdoor air intake duct, and the air-cooled air compressor draws in low-temperature air from the outside. After internal heat exchange, it forms hot air. 2. Waste heat recovery and heating distribution: Part of the hot air is introduced into the room through the hot air exhaust pipe. The opening of the wind deflector is adjusted in real time according to the indoor temperature to control the air intake. The remaining hot air enters the gas-water heat exchanger through the heat exchange pipe, where it exchanges heat with the production feed water in a countercurrent manner to preheat the production feed water. The hot air is then cooled and discharged into the atmosphere. 3. Compressed air process: The compressed air output from the air-cooled air compressor is buffered by the air storage tank and then delivered to the dry quenching coke supply system that uses compressed air; Summer operating mode: 1. Airflow switching: Close the outdoor air intake duct and open the indoor air intake. The air-cooled air compressor draws air from the room as cooling air, which is then converted into hot air after internal heat exchange. 2. Direct hot air exhaust: All hot air is directly exhausted to the atmosphere through the hot air exhaust duct, and the air-water heat exchanger does not participate in the operation; 3. Compressed air process: The compressed air produced by the air-cooled air compressor is output and then buffered by the air storage tank before being delivered to the dry quenching coke supply system for use.
[0006] The windbreak door is an electrically or pneumatically adjustable damper.
[0007] Compared with existing technologies, the beneficial effects of this invention are: 1. The installation of indoor and outdoor air intakes ensures that the air volume required for air compressor cooling is fully met. This solves the problem of excessively low indoor temperatures during winter operation of large air-cooled units.
[0008] 2. In winter, preheating the production water by recovering waste heat significantly reduces the energy consumption for heating the production water; at the same time, using waste heat to compensate for indoor heating reduces additional heating investment and achieves energy conservation and consumption reduction.
[0009] 3. It enables flexible switching of the air intake source and exhaust direction of the air-cooled air compressor in both winter and summer, adapting to the environmental needs of different seasons. It is particularly suitable for water-scarce areas and coking plants with limited cooling water, improving the system's operational flexibility. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the winter operation mode of the present invention.
[0011] Figure 2 This is a schematic diagram of the summer operation mode of the present invention.
[0012] In the diagram: 1. Air-cooled air compressor; 2. Refrigerated dryer; 3. Air tank; 4. Indoor air intake; 5. Outdoor air intake duct; 6. Exhaust duct; 7. Baffle; 8. Hot air exhaust duct; 9. First shut-off valve; 10. Heat exchange duct; 11. Second shut-off valve; 12. Air-water heat exchanger; 13. Dry quenching coke supply system. Detailed Implementation
[0013] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.
[0014] like Figure 1 A dual-mode operation device for winter and summer air-cooled air compressors and waste heat recovery system includes an indoor air-cooled air compressor 1. The compressed air outlet of the air-cooled air compressor 1 is sequentially connected to a refrigerated dryer 2 and an air tank 3. The air-cooled air compressor 1 is equipped with an indoor air intake 4. The air inlet of the air-cooled air compressor 1 is connected to an outdoor air intake duct 5. The exhaust outlet of the air-cooled air compressor 1 is connected to an exhaust duct 6. A baffle 7 is installed inside the exhaust duct 6. The exhaust duct 6 is connected to a hot air exhaust duct 8 and a heat exchange duct. 10. A first shut-off valve 9 is provided on the hot air exhaust pipe 8, and a second shut-off valve 11 is provided on the heat exchange pipe 10. A gas-water heat exchanger 12 is connected to the heat exchange pipe 10. The gas-side inlet of the gas-water heat exchanger 12 is connected to the heat exchange pipe 10, and the gas-side outlet is connected to the atmosphere. The water-side inlet and outlet of the gas-water heat exchanger 12 are connected to the coking plant's production water supply pipeline. The preheated water is sent into the coking plant's production water supply pipeline for circulation. The outlet of the gas storage tank 3 is connected to the dry quenching coke supply gas system 13. The device employs a dual-mode operation and waste heat recovery method, including both winter and summer operation modes. Winter operating mode: 1. Air path switching: Open the outdoor air intake duct 5, and the air-cooled air compressor 1 draws in low-temperature air from the outside. After internal heat exchange, it forms hot air. 2. Waste heat recovery and heating distribution: Part of the hot air is introduced into the room through the hot air exhaust pipe 8. The opening of the wind deflector 7 is adjusted in real time according to the indoor temperature to control the air intake and maintain a comfortable indoor temperature. The remaining hot air enters the gas-water heat exchanger 12 through the heat exchange pipe 10, where it exchanges heat with the production feed water in a countercurrent manner to preheat the production feed water. The hot air is then cooled and discharged into the atmosphere. 3. Compressed air process: The compressed air output from the air-cooled air compressor 1 is buffered by the air storage tank 3 and then delivered to the dry quenching coke supply system 13 that uses compressed air; Summer operating mode: 1. Air duct switching: Close the outdoor air intake duct 5 and open the indoor air intake vent 4. The air-cooled air compressor 1 draws air from the room as cooling air, which is then converted into hot air after internal heat exchange. 2. Direct hot air exhaust: All hot air is directly exhausted to the atmosphere through the hot air exhaust duct 8, avoiding heat accumulation in the room and causing the room temperature to rise; the air-water heat exchanger 12 does not participate in the operation; 3. Compressed air process: The compressed air produced by the air-cooled air compressor 1 is output and then buffered by the air storage tank 3 before being delivered to the dry quenching coke supply system 13 for use.
[0015] Among them, the hot air exhaust pipe 8 is used for indoor heating in winter and for exhausting the atmosphere in summer.
[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0017] Example: A dual-mode operation device for winter and summer air-cooled air compressors and a waste heat recovery system includes an indoor air-cooled air compressor 1. The compressed air outlet of the air-cooled air compressor 1 is sequentially connected to a refrigerated dryer 2 and an air tank 3. The air-cooled air compressor 1 is equipped with an indoor air intake 4. An outdoor air intake duct 5 is connected to the air inlet of the air-cooled air compressor 1. An exhaust duct 6 is connected to the exhaust outlet of the air-cooled air compressor 1. A baffle 7 is installed inside the exhaust duct 6. The exhaust duct 6 is connected to a hot air exhaust duct 8 and a heat exchange duct. 10. A first shut-off valve 9 is provided on the hot air exhaust pipe 8, and a second shut-off valve 11 is provided on the heat exchange pipe 10. A gas-water heat exchanger 12 is connected to the heat exchange pipe 10. The gas-side inlet of the gas-water heat exchanger 12 is connected to the heat exchange pipe 10, and the gas-side outlet is connected to the atmosphere. The water-side inlet and outlet of the gas-water heat exchanger 12 are connected to the coking plant's production water supply pipeline. The preheated water is sent into the coking plant's production water supply pipeline for circulation. The outlet of the gas storage tank 3 is connected to the dry quenching coke supply gas system 13. Winter mode working method 1. Air path switching: Open the outdoor air intake duct 5, open the first shut-off valve 9, open the second shut-off valve 11, and the air-cooled air compressor 1 draws in low-temperature air from the outside. After internal heat exchange, it forms 45°C hot air.
[0018] 2. Waste heat recovery and heating distribution: Part of the hot air is discharged into the room through the hot air exhaust pipe 8. The opening of the wind deflector 7 is adjusted in real time according to the indoor temperature to control the air intake. The remaining hot air enters the air-water heat exchanger 12 through the heat exchange pipe 10 and exchanges heat with the 15℃ production feed water in a countercurrent manner. After the feed water is preheated to 25℃, the hot air is cooled to 25℃ and discharged into the atmosphere.
[0019] 3. Compressed air process: The 40℃ compressed air output from the air-cooled air compressor 1 is buffered by the air storage tank 3 and then delivered to the dry quenching air supply system 13, which uses compressed air. The compressed air pressure of the dry quenching air supply system 13 is 0.5-0.7MPa.
[0020] Summer Mode Working Method 1. Air Path Switching: Close the outdoor air intake duct 5, open the indoor air intake vent 4, close the second shut-off valve 11, open the first shut-off valve 9, and the air-cooled air compressor 1 draws air from the room as cooling air, which is then converted into 45°C hot air after internal heat exchange.
[0021] 2. Hot air direct exhaust: All hot air is directly exhausted to the atmosphere through the hot air exhaust pipe 8, and the air-water heat exchanger 12 does not participate in the operation.
[0022] 3. Compressed air process: Consistent with winter mode, 40℃ compressed air is buffered by air tank 3 and then delivered to dry quenching air supply system 13. The compressed air pressure of dry quenching air supply system 13 is 0.5-0.7MPa.
[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for air-cooled air compressor winter and summer dual-mode operation and waste heat recovery, characterized in that, The system includes an indoor air-cooled air compressor. The compressed air outlet of the air-cooled air compressor is sequentially connected to a refrigerated dryer and an air storage tank. The air-cooled air compressor has an indoor air intake port. The air inlet of the air-cooled air compressor is connected to an outdoor air intake duct. The air outlet of the air-cooled air compressor is connected to an exhaust duct. The exhaust duct is equipped with a damper. The exhaust duct is connected to a hot air exhaust duct and a heat exchange duct. The hot air exhaust duct has a first shut-off valve, and the heat exchange duct has a second shut-off valve. A gas-water heat exchanger is connected to the heat exchange duct. The gas-side inlet of the gas-water heat exchanger is connected to the heat exchange duct, and the gas-side outlet is open to the atmosphere. The water-side inlet and outlet of the gas-water heat exchanger are connected to the coking plant's production water supply pipeline, and the preheated water is circulated within the coking plant's production water supply pipeline. The air storage tank is connected to the dry quenching coke supply system. The device employs a dual-mode operation and waste heat recovery method, including both winter and summer operation modes. Winter operating mode: 1) Air duct switching: Open the outdoor air intake duct, and the air-cooled air compressor draws in low-temperature air from the outside. After internal heat exchange, it forms hot air. 2) Waste heat recovery and heating distribution: Part of the hot air is introduced into the room through the hot air exhaust pipe. The opening of the wind deflector is adjusted in real time according to the indoor temperature to control the air intake. The remaining hot air enters the gas-water heat exchanger through the heat exchange pipe, where it exchanges heat with the production water in a countercurrent flow to preheat the production water. The hot air is then cooled and discharged into the atmosphere. 3) Compressed air process: The compressed air output from the air-cooled air compressor is buffered by the air storage tank and then delivered to the dry quenching coke supply system that uses compressed air; Summer operating mode: 1) Air duct switching: Close the outdoor air intake duct and open the indoor air intake. The air-cooled air compressor draws air from the room as cooling air, which is then converted into hot air after internal heat exchange. 2) Hot air direct exhaust: All hot air is directly exhausted to the atmosphere through the hot air exhaust pipe, and the air-water heat exchanger does not participate in the operation; 3) Compressed air process: The compressed air produced by the air-cooled air compressor is output and then buffered by the air storage tank before being delivered to the dry quenching coke supply system for use.
2. The air-cooled air compressor winter-summer dual-mode operation and waste heat recovery device according to claim 1, characterized in that, The windbreak door is an electrically or pneumatically adjustable damper.