Gas and heat combined supply compressor unit with air heat recovery function and waste heat using method of gas and heat combined supply compressor unit

Abstract

The invention is suitable for the field of heat supply pipelines, and provides a gas and heat combined supply compressor unit with an air heat recovery function and a waste heat using method thereof.The gas and heat combined supply compressor unit with the air heat recovery function is characterized in that a second heat exchanger is connected with a bathing energy supply mechanism, and a third heat exchanger is connected with an office heat supply mechanism; the tubular radiator is connected with a mine deicing mechanism; and the intercooler is also connected with a branch mechanism. When the air compressor is used, normal-temperature and normal-pressure air enters the first compressor through the normal-temperature and normal-pressure air channel, high-temperature air with certain pressure is generated after the first compressor is subjected to primary compression, and the high-temperature air is cooled by the intercooler to become low-temperature air with certain pressure and enters the second compressor; and the high-pressure and high-temperature gas enters a third compressor after being cooled by an intercooler, and is finally discharged and supplied to a compressed air pipe network after being cooled and compressed three times step by step.

Description

Technical Field

[0001] The present invention belongs to the field of heating pipelines, and particularly relates to a gas-heat combined supply compressor unit with air heat recovery and a method for using its waste heat. Background Art

[0002] Existing compressor equipment uses a multi-stage series compression method to produce high-pressure compressed air. During the process of compressing air, in addition to increasing the air pressure energy, a large amount of heat is inevitably generated. The pressure energy is required for production, while the large amount of heat energy generated during the compression process is not needed. Since high-temperature gas is not easily compressed and causes the temperature of the compressor unit to be too high, which affects the efficiency of the compressor, the compressor often configures multiple intermediate coolers according to the number of compression stages to cool down the compressed air at each stage to improve the compression efficiency and ensure the normal operation of the unit. Each intermediate cooler is usually connected to a cooling water tower to dissipate heat into the surrounding environment;

[0003] The internal energy of air increases during the compression process. In addition to generating a certain pressure, a large amount of heat is also generated, and the temperature increase is an unwanted but inevitable phenomenon. The conventional measure is to dissipate this part of the heat into the surrounding environment through an intermediate cooler, wasting a large amount of energy. According to statistics, during the process of compressing air by the compressor, about 30% of the total electrical energy consumed by the compressor generates the required pressure energy, and the remaining 70% of the electrical energy is released in the form of heat, resulting in an increase in the gas temperature. The temperature of the high-temperature gas is as high as 120 - 130 °C or even higher. On the one hand, the high temperature of the gas during the compression process of air affects the compression efficiency of the compressor, and on the other hand, this part of the heat causes the temperature of the unit to be relatively high. Therefore, it is necessary to increase heat dissipation cooling equipment to dissipate heat from the compressor unit. Currently, the conventional cooling water tower heat dissipation method wastes heat into the air. If this part of the heat can be effectively utilized, it will generate huge economic and social benefits. Summary of the Invention

[0004] The purpose of the present invention is to provide a gas-heat combined supply compressor unit with air heat recovery and a method for using its waste heat in view of the deficiencies of the prior art. When this device is in use, normal temperature and pressure air enters the first compressor through the normal temperature and pressure air duct. After the first compressor performs primary compression, high-temperature air with a certain pressure is generated. After this high-temperature gas is cooled by the intermediate cooler, it becomes low-temperature gas with a certain pressure and enters the second compressor. After being compressed again by the second compressor, high-temperature gas with a higher pressure is formed. After this high-pressure and high-temperature gas is cooled by the intermediate cooler, it enters the third compressor. After being cooled and compressed three times step by step, until the required compressed air is produced and finally discharged and supplied to the compressed air pipe network, so as to solve the problems mentioned in the background art.

[0005] To solve the above problems, the present invention provides the following technical solutions: A gas-thermal combined supply compressor unit with air heat recovery, including a first compressor, a second compressor, and a third compressor. The first compressor is connected to a first air compression coil, the second compressor is connected to a second air compression coil, and the third compressor is connected to a third air compression coil. The first air compression coil, the second air compression coil, and the third air compression coil are all inserted into the internal of the intercooler. The input end of the first compressor is connected to a normal temperature and pressure air duct, and the output end of the third compressor is connected to a normal temperature and pressure air duct; The access nozzle of the first air compression coil is connected to the output end of the first compressor, the discharge nozzle of the first air compression coil is connected to the input end of the second compressor, the access nozzle of the second air compression coil is connected to the output end of the second compressor, the discharge nozzle of the second air compression coil is connected to the input end of the third compressor, the access nozzle of the third air compression coil is connected to the output end of the third compressor, and the discharge nozzle of the third air compression coil is connected to an air pump. The air pump transports the air inside the first air compression coil, the second air compression coil, and the third air compression coil to the inside of the compressed air pipe network; The intercooler is connected to a first heat exchanger, a second heat exchanger, a third heat exchanger, and a tubular radiator. The first heat exchanger, the second heat exchanger, the third heat exchanger, and the tubular radiator form a closed-loop pipeline. The second heat exchanger is connected to a bathing energy supply mechanism, the third heat exchanger is connected to an office heating mechanism, and the tubular radiator is connected to a mine deicing mechanism; The intercooler is also connected to a branch.

[0006] During use, the normal temperature and pressure air enters the first compressor through the normal temperature and pressure air duct. After the first compressor performs a primary compression, high-temperature air with a certain pressure is generated. This high-temperature gas is cooled by the intercooler and then becomes low-temperature gas with a certain pressure and enters the second compressor. After being compressed again by the second compressor, high-temperature gas with a higher pressure is formed. This high-pressure and high-temperature gas is cooled by the intercooler and then enters the third compressor. After being cooled and compressed three times step by step, until the required compressed air is produced, and finally discharged and supplied to the compressed air pipe network. The intercooler transfers energy to the first heat exchanger, and the first heat exchanger then transfers the hot water energy step by step to the second heat exchanger, the third heat exchanger, and the tubular radiator. The second heat exchanger, the third heat exchanger, and the tubular radiator respectively supply heat to the bathing energy supply mechanism, the office heating mechanism, and the mine deicing mechanism.

[0007] Further, the bathing energy supply mechanism includes a bathing room, and the heat exchange pipeline of the bathing room is connected to the second heat exchanger.

[0008] During use, in winter, the energy of the hot water is first transferred to the bathing room, and the heat exchange pipeline inside the bathing room is heated and then heats the bath water.

[0009] Further, the office heating mechanism includes an office building area, and the heating pipeline of the office building area is connected to the third heat exchanger.

[0010] During use, in winter, after the hot water heats the bath water, it continues to supply heat to the heating pipeline of the office building area.

[0011] Further, the mine de-icing mechanism includes a tubular radiator, which is arranged at the mine shaft of the mine. There is a mine fan at the mine shaft of the mine, and the wind direction of the mine fan is from top to bottom.

[0012] During use, in winter, the hot water coming out of the office building area flows into the tubular radiator again. A fan is installed on the tubular radiator to de-ice the mine shaft.

[0013] Further, the branch includes a lithium bromide chiller, which is connected to the circulation pipeline of the intermediate cooler through the first three-way valve and the second three-way valve. There are a third three-way valve and a fourth three-way valve on the circulation pipeline of the office building area. The third three-way valve and the fourth three-way valve separate a bifurcated pipeline, and the bifurcated pipeline is connected to the lithium bromide chiller.

[0014] During use, in summer, the thermal energy of the compressed air is specifically used to drive the lithium bromide chiller to refrigerate. The lithium bromide chiller is used for office area refrigeration. When the first three-way valve, the second three-way valve, the third three-way valve, and the fourth three-way valve are opened, the pipeline system of the branch is started, and the pipeline systems of the first heat exchanger, the second heat exchanger, the third heat exchanger, and the tubular radiator are closed. The 85°C hot water is supplied to the lithium bromide chiller for operation. 7°C cold water is produced by the lithium bromide chiller, and the cold water is supplied to the office building area through the third three-way valve and the fourth three-way valve for summer indoor cooling. Part of the 85°C hot water can also be introduced into the bathhouse for preparing employees' domestic water.

[0015] Further, a makeup water pipe is also connected to the heat exchange pipeline of the bathhouse, and a fifth three-way valve is arranged at the connection of the heat exchange pipeline of the bathhouse and the makeup water pipe.

[0016] During use, the bath water lost in the heat exchange pipeline of the bathhouse is replenished from the makeup water pipe.

[0017] Further, it includes the following steps:

[0018] S1. Ambient air at normal temperature and pressure enters the first compressor through the ambient air duct. After being compressed in one stage by the first compressor, high-temperature air with a certain pressure is generated. After being cooled by the intercooler, the high-temperature gas becomes low-temperature gas with a certain pressure and enters the second compressor. After being compressed again by the second compressor, high-temperature gas with a higher pressure is formed. After being cooled by the intercooler, the high-pressure and high-temperature gas enters the third compressor. After being cooled and compressed step by step three times, the required compressed air is finally produced and discharged to the compressed air pipe network for supply.

[0019] S2. The water liquid inside the intercooler is heated to 85°C by the hot air. After the water liquid inside the intercooler transfers the heat to the first heat exchanger, the temperature of the water liquid inside the first heat exchanger is 80°C. After passing through the second heat exchanger, the third heat exchanger, and the tubular radiator, the energy of the 80°C water liquid gradually decreases. The bathing room, the office building area, and the tubular radiator will also gradually obtain the remaining heat from the previous stage.

[0020] S3. In summer, the thermal energy of the compressed air is specifically used to drive the lithium bromide chiller for refrigeration. The lithium bromide chiller is used for cooling the office area. When the first three-way valve, the second three-way valve, the third three-way valve, and the fourth three-way valve are opened, the pipeline system of the branch is opened, and the pipeline systems of the first heat exchanger, the second heat exchanger, the third heat exchanger, and the tubular radiator are closed. 85°C hot water is supplied to the lithium bromide chiller for operation. 7°C cold water is produced by the lithium bromide chiller. The cold water is supplied to the office building area for summer indoor cooling through the third three-way valve and the fourth three-way valve. Part of the 85°C hot water can also be introduced into the bathing room for preparing domestic water for employees.

[0021] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0022] First, ambient air at normal temperature and pressure enters the first compressor through the ambient air duct. After being compressed in one stage by the first compressor, high-temperature air with a certain pressure is generated. After being cooled by the intercooler, the high-temperature gas becomes low-temperature gas with a certain pressure and enters the second compressor. After being compressed again by the second compressor, high-temperature gas with a higher pressure is formed. After being cooled by the intercooler, the high-pressure and high-temperature gas enters the third compressor. After being cooled and compressed step by step three times, the required compressed air is finally produced and discharged to the compressed air pipe network for supply, achieving the effect of efficiently extracting compressed air, and the heat obtained by the intercooler is also fully utilized.

[0023] Second, the water liquid inside the intercooler is heated to 85°C by the hot air. After the water liquid inside the intercooler transfers the heat to the first heat exchanger, the temperature of the water liquid inside the first heat exchanger is 80°C. The energy of the 80°C water liquid gradually decreases after passing through the second heat exchanger, the third heat exchanger, and the tubular radiator. The bathing room, the office building area, and the tubular radiator will also gradually obtain the remaining heat from the previous level.

[0024] Third, in summer, the thermal energy of the compressed air is specifically used to drive the lithium bromide water chiller for refrigeration. The lithium bromide water chiller is used for refrigerating the office area. When the first three-way valve, the second three-way valve, the third three-way valve, and the fourth three-way valve are opened, the pipeline system of the branch is started, and the pipeline systems of the first heat exchanger, the second heat exchanger, the third heat exchanger, and the tubular radiator are closed. The 85°C hot water is supplied to the lithium bromide water chiller for operation. 7°C cold water is produced by the lithium bromide water chiller. The cold water is supplied to the office building area for indoor cooling in summer through the third three-way valve and the fourth three-way valve. Part of the 85°C hot water can also be introduced into the bathing room for preparing domestic water for employees. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the system block diagram of the present invention.

[0026] Figure 2 It is a schematic diagram of the three-way valve body of the present invention.

[0027] Description of the Reference Numerals:

[0028] The first compressor 1, the normal temperature and pressure air duct 101, the second compressor 2, the third compressor 3, the intercooler 4, the first heat exchanger 5, the second heat exchanger 6, the third heat exchanger 7, the lithium bromide water chiller 8, the compressed air pipe network 9, the bathing room 10, the make-up water pipe 11, the office building area 12, the tubular radiator 13, the mine fan 1301, the first three-way valve 14, the second three-way valve 15, the third three-way valve 16, the fourth three-way valve 17, the fifth three-way valve 18. Detailed Embodiment

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects, rather than to describe a specific order.

[0030] References to "embodiments" in this specification mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] The present invention provides a gas and heat combined supply compressor unit with air heat recovery, as Figure 1 shown, including a first compressor 1, a second compressor 2, and a third compressor 3. The first compressor 1 is connected to a first air compression coil, the second compressor 2 is connected to a second air compression coil, and the third compressor 3 is connected to a third air compression coil. The first air compression coil, the second air compression coil, and the third air compression coil are all inserted into an intermediate cooler 4. The input end of the first compressor 1 is connected to a normal temperature and pressure air duct 101, and the output end of the third compressor 3 is connected to a normal temperature and pressure air duct 101. The inlet nozzle of the first air compression coil is connected to the output end of the first compressor 1, the discharge nozzle of the first air compression coil is connected to the input end of the second compressor 2, the inlet nozzle of the second air compression coil is connected to the output end of the second compressor 2, the discharge nozzle of the second air compression coil is connected to the input end of the third compressor 3, the inlet nozzle of the third air compression coil is connected to the output end of the third compressor 3, and the discharge nozzle of the third air compression coil is connected to an air pump, which conveys the air inside the first air compression coil, the second air compression coil, and the third air compression coil to the inside of a compressed air pipe network 9. The intermediate cooler 4 is connected to a first heat exchanger 5, a second heat exchanger 6, a third heat exchanger 7, and a tubular radiator 13. The first heat exchanger 5, the second heat exchanger 6, the third heat exchanger 7, and the tubular radiator 13 form a closed-loop pipeline. The second heat exchanger 6 is connected to a bathing energy supply mechanism, the third heat exchanger 7 is connected to an office heating mechanism, and the tubular radiator 13 is connected to a mine deicing mechanism. The intermediate cooler 4 is also connected to a branch.

[0032] In this embodiment, air at normal temperature and pressure enters the first compressor 1 through the airway 101 at normal temperature and pressure. After being compressed at the first stage by the first compressor 1, high-temperature air with a certain pressure is generated. After being cooled by the intercooler 4, this high-temperature gas becomes low-temperature gas with a certain pressure and enters the second compressor 2. After being compressed again by the second compressor 2, high-temperature gas with a higher pressure is formed. After being cooled by the intercooler 4, this high-pressure and high-temperature gas enters the third compressor 3. After being cooled and compressed step by step three times, the required compressed air is finally produced and discharged to the compressed air pipe network 9. The intercooler 4 transfers energy to the first heat exchanger 5, and the first heat exchanger 5 then transfers the hot water energy step by step to the second heat exchanger 6, the third heat exchanger 7, and the tubular radiator 13. The second heat exchanger 6, the third heat exchanger 7, and the tubular radiator 13 supply heat to the bathing energy supply mechanism, the office heating mechanism, and the mine de-icing mechanism respectively.

[0033] In a further embodiment of the present invention, as Figure 1 shown, the bathing energy supply mechanism includes a bathing room 10, and the heat exchange pipeline of the bathing room 10 is connected to the second heat exchanger 6.

[0034] In this embodiment, in winter, the energy of the hot water is first transferred to the bathing room, and the heat exchange pipeline inside the bathing room 10 is heated to heat the bath water.

[0035] In a further embodiment of the present invention, as Figure 1 shown, the office heating mechanism includes an office building area 12, and the heating pipeline of the office building area 12 is connected to the third heat exchanger 7.

[0036] In this embodiment, in winter, after heating the bath water, the hot water continues to supply heat to the heating pipeline of the office building area 12.

[0037] In a further embodiment of the present invention, as Figure 1 shown, the mine de-icing mechanism includes a tubular radiator 13, which is arranged at the wellhead of the mine. A mine fan 1301 is arranged at the wellhead of the mine, and the wind direction of the mine fan 1301 is from top to bottom.

[0038] In this embodiment, in winter, the hot water coming out of the office building area 12 flows into the tubular radiator 13 again, and a fan is installed on the tubular radiator 13 to de-ice the wellhead of the mine.

[0039] In a further embodiment of the present invention, as Figure 2As shown, the branch includes a lithium bromide chiller 8, which is connected to the circulation pipeline of the intermediate cooler 4 through a first three-way valve 14 and a second three-way valve 15. A third three-way valve 16 and a fourth three-way valve 17 are provided on the circulation pipeline of the office building area 12. The third three-way valve 16 and the fourth three-way valve 17 separate a branched pipeline, and the branched pipeline is connected to the lithium bromide chiller 8.

[0040] In this embodiment, in summer, the thermal energy of the compressed air is specifically used to drive the lithium bromide chiller 8 for refrigeration. The lithium bromide chiller 8 is used for cooling the office area. When the first three-way valve 14, the second three-way valve 15, the third three-way valve 16, and the fourth three-way valve 17 are opened, the pipeline system of the branch is opened, and the pipeline systems of the first heat exchanger 5, the second heat exchanger 6, the third heat exchanger 7, and the tube radiator 13 are closed. 85°C hot water is supplied to the lithium bromide chiller 8 for operation. 7°C cold water is produced by the lithium bromide chiller 8, and the cold water is supplied to the office building area 12 through the third three-way valve 16 and the fourth three-way valve 17 for indoor cooling in summer. Part of the 85°C hot water can also be introduced into the bathing room 10 for preparing domestic water for employees.

[0041] In a further embodiment of the present invention, as Figure 2 shown, a make-up water pipe 11 is further connected to the heat exchange pipeline of the bathing room 10, and a fifth three-way valve 18 is provided at the connection of the heat exchange pipeline of the bathing room 10 and the make-up water pipe 11.

[0042] In this embodiment, the bath water lost in the heat exchange pipeline of the bathing room 10 is replenished from the make-up water pipe 11.

[0043] It includes the following steps:

[0044] S1. Air at normal temperature and pressure enters the first compressor 1 through the normal temperature and pressure air duct 101. After being compressed at the first stage by the first compressor 1, high-temperature air with a certain pressure is generated. After being cooled by the intermediate cooler 4, the high-temperature gas becomes low-temperature gas with a certain pressure and enters the second compressor 2. After being compressed again by the second compressor 2, high-temperature gas with a higher pressure is formed. After being cooled by the intermediate cooler 4, the high-pressure and high-temperature gas enters the third compressor 3. After being cooled and compressed three times step by step, the required compressed air is finally produced and discharged to the compressed air pipe network 9.

[0045] S2. The water liquid inside the intermediate cooler 4 is heated to 85°C by the hot air. After the water liquid inside the intermediate cooler 4 transfers the heat to the first heat exchanger 5, the water liquid temperature inside the first heat exchanger 5 is 80°C. After passing through the second heat exchanger 6, the third heat exchanger 7, and the tube radiator 13, the energy of the 80°C water liquid gradually decreases. The bathing room 10, the office building area 12, and the tube radiator 13 will also gradually obtain the remaining heat from the previous stage.

[0046] S3. In summer, the thermal energy of the compressed air is specifically used to drive the lithium bromide water chiller 8 for refrigeration. The lithium bromide water chiller 8 is used for refrigerating the office area. When the first three-way valve 14, the second three-way valve 15, the third three-way valve 16, and the fourth three-way valve 17 are opened, the pipeline system of the branch is opened, and the pipeline systems of the first heat exchanger 5, the second heat exchanger 6, the third heat exchanger 7, and the tubular radiator 13 are closed. 85°C hot water is supplied to the lithium bromide water chiller 8 for operation. Through the lithium bromide water chiller 8, 7°C cold water is produced. Through the third three-way valve 16 and the fourth three-way valve 17, the cold water is supplied to the office building area 12 for indoor cooling in summer. Part of the 85°C hot water can also be introduced into the bathing room 10 for preparing domestic water for employees.

[0047] It should be noted that, for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0048] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the above-mentioned unit division may have other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the shown or discussed coupling or communication connection between each other may be through some interfaces. The indirect coupling or communication connection between devices or units may be in the form of telecommunications or other forms.

[0049] The units described as separate components above may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the invention. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict and without creative efforts, combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A gas and heat combined supply compressor unit with air heat recovery, characterized in that: It includes a first compressor (1), a second compressor (2) and a third compressor (3). The first compressor (1) is connected with a first air compression coil pipe, the second compressor (2) is connected with a second air compression coil pipe, and the third compressor (3) is connected with a third air compression coil pipe. The first air compression coil pipe, the second air compression coil pipe and the third air compression coil pipe are all inserted into the intermediate cooler (4). The input end of the first compressor (1) is connected to a normal temperature and pressure air duct (101), and the output end of the third compressor (3) is connected to a normal temperature and pressure air duct (101); The access nozzle of the first air compression coil pipe is connected to the output end of the first compressor (1), the discharge nozzle of the first air compression coil pipe is connected to the input end of the second compressor (2), the access nozzle of the second air compression coil pipe is connected to the output end of the second compressor (2), the discharge nozzle of the second air compression coil pipe is connected to the input end of the third compressor (3), the access nozzle of the third air compression coil pipe is connected to the output end of the third compressor (3), and the discharge nozzle of the third air compression coil pipe is connected to an air pump. The air pump transports the air inside the first air compression coil pipe, the second air compression coil pipe and the third air compression coil pipe into the compressed air pipe network (9); The intermediate cooler (4) is connected with a first heat exchanger (5), a second heat exchanger (6), a third heat exchanger (7) and a tubular radiator (13). The first heat exchanger (5), the second heat exchanger (6), the third heat exchanger (7) and the tubular radiator (13) form a closed-loop pipeline. The second heat exchanger (6) is connected to a bath energy supply mechanism, the third heat exchanger (7) is connected to an office heating mechanism, and the tubular radiator (13) is connected to a mine deicing mechanism; The intermediate cooler (4) is also connected with a branch; 2. The air-heat combined supply compressor unit with air heat recovery according to claim 1, wherein: The bath energy supply mechanism includes a bathhouse (10), and the heat exchange pipeline of the bathhouse (10) is connected to the second heat exchanger (6); 3. The air-heat combined supply compressor unit with air heat recovery according to claim 1, characterized in that: The office heating mechanism includes an office building area (12), and the heating pipeline of the office building area (12) is connected to the third heat exchanger (7); 4. A gas-thermal combined supply compressor unit with air heat recovery according to claim 1, characterized in that: The mine deicing mechanism includes a tubular radiator (13). The tubular radiator (13) is arranged at the wellhead of the mine, and a mine fan (1301) is arranged at the wellhead of the mine. The wind direction of the mine fan (1301) is from top to bottom; 5. A gas and heat combined supply compressor unit with air heat recovery according to claim 1, characterized in that: The branch includes a lithium bromide water chiller (8). The lithium bromide water chiller (8) is connected to the circulating pipeline of the intermediate cooler (4) through a first three-way valve (14) and a second three-way valve (15). A third three-way valve (16) and a fourth three-way valve (17) are arranged on the circulating pipeline of the office building area (12). The third three-way valve (16) and the fourth three-way valve (17) separate a branch pipeline, and the branch pipeline is connected to the lithium bromide water chiller (8); 6. The air-heat combined supply compressor unit with air heat recovery according to claim 2, wherein: A makeup water pipe (11) is also connected to the heat exchange pipeline of the bathhouse (10), and a fifth three-way valve (18) is arranged at the connection of the heat exchange pipeline of the bathhouse (10) and the makeup water pipe (11); 7. A method for using the waste heat of a gas-thermal combined supply compressor unit with air heat recovery according to any one of claims 1-5, characterized in that, It includes the following steps: S1. Air at normal temperature and pressure enters the first compressor (1) through the airway (101) at normal temperature and pressure. After being compressed at the first stage by the first compressor (1), high-temperature air with a certain pressure is generated. After being cooled down by the intercooler (4), this high-temperature gas becomes low-temperature gas with a certain pressure and enters the second compressor (2). After being compressed again by the second compressor (2), high-temperature gas with a higher pressure is formed. After being cooled down by the intercooler (4), this high-pressure and high-temperature gas enters the third compressor (3). After being cooled and compressed step by step three times, the required compressed air is finally produced and discharged to the compressed air pipe network (9). S2. The water liquid inside the intercooler (4) is heated to 85°C by the hot air. After the water liquid inside the intercooler (4) transfers the heat to the first heat exchanger (5), the temperature of the water liquid inside the first heat exchanger (5) is 80°C. After passing through the second heat exchanger (6), the third heat exchanger (7), and the tubular radiator (13), the energy of the 80°C water liquid gradually decreases. The bathing room (10), the office building area (12), and the tubular radiator (13) will also gradually obtain the remaining heat from the previous level. S3. In summer, the thermal energy of the compressed air is specifically used to drive the lithium bromide chiller (8) for refrigeration. The lithium bromide chiller (8) is used for cooling the office area. When the first three-way valve (14), the second three-way valve (15), the third three-way valve (16), and the fourth three-way valve (17) are opened, the pipeline system of the branch is opened, and the pipeline systems of the first heat exchanger (5), the second heat exchanger (6), the third heat exchanger (7), and the tubular radiator (13) are closed. 85°C hot water is supplied to the lithium bromide chiller (8) for operation. 7°C cold water is produced by the lithium bromide chiller (8). The cold water is supplied to the office building area (12) for indoor cooling in summer through the third three-way valve (16) and the fourth three-way valve (17). Part of the 85°C hot water can also be introduced into the bathing room (10) for preparing domestic water for employees.

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