Method for utilizing compression heat of air compressor

Abstract

The invention discloses a method for utilizing compression heat of an air compressor, which comprises the following steps of: S1, directly introducing high-temperature compressed air compressed by the air compressor into a first heat exchanger, and performing first heat exchange with hot water to be subjected to heat exchange in the first heat exchanger; s2, the compressed air subjected to heat exchange is discharged into a cooler, and after the compressed air is cooled to meet the working temperature of a compressed air aftertreatment system, the compressed air is conveyed into the compressed air aftertreatment system; s3, hot water obtained after heat exchange in the first heat exchanger is conveyed into a second heat exchanger, and heat exchange is conducted on the hot water and steam in the steam pipe to be subjected to heat exchange for the second time; and S4, the hot water obtained after secondary heat exchange is conveyed to a user side. According to the application of the method, the method for utilizing the compression heat of the air compressor is provided, heat exchange is carried out on high-temperature compressed air and hot water in the heating water return pipe, heat which is wasted originally is transferred and utilized, heat energy is provided for the hot water, and the energy utilization rate can be increased easily.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressed air station and heat exchange station in glass production, and particularly relates to a method for utilizing compressed heat of an air compressor. BACKGROUND

[0002] In the existing compressed air technology system, in order to meet the use requirements of the user end for low dew point compressed air, the high-temperature compressed air compressed by the air compressor is directly cooled to a specific temperature by using the conventional air cooling or water cooling method, and then is delivered to a compressed air post-processing system to finally obtain the low dew point compressed air meeting the user requirements. However, in this process, a large amount of compressed heat generated by the air compressor is directly discharged into the environment by means of water cooling or air cooling heat exchange, which undoubtedly causes serious waste of resources and energy. At the same time, in the relatively cold regions of China, a heat exchange station is usually set up in a glass factory to ensure the normal operation of the entire factory in the cold climate. The heat exchange station mainly transfers heat to various station buildings in the factory area by means of heat exchange between steam and hot water. Although this traditional heating method can meet the heating requirements of the factory, from the perspective of comprehensive utilization of energy, there is obvious irrationality: on the one hand, the generation of steam needs to consume a large amount of energy such as coal and natural gas, which not only increases the energy cost but also causes environmental pollution; on the other hand, the compressed heat generated by the air compressor can be used as a potential heat source, but it is not fully utilized, resulting in serious waste of energy. SUMMARY

[0003] Therefore, in order to solve the above problems, the purpose of the present application is to provide a method for utilizing compressed heat of an air compressor, comprising the following steps:

[0004] S1: directly connecting the high-temperature compressed air compressed by the air compressor to a first heat exchanger to perform first heat exchange with hot water to be heat-exchanged in the first heat exchanger;

[0005] S2: discharging the heat-exchanged compressed air to a cooler, cooling the heat-exchanged compressed air to a working temperature meeting the requirements of a compressed air post-processing system, and then delivering the heat-exchanged compressed air to the compressed air post-processing system;

[0006] S3: delivering the hot water heat-exchanged in the first heat exchanger to a second heat exchanger to perform second heat exchange with steam in a steam pipe to be heat-exchanged;

[0007] S4: delivering the hot water heat-exchanged twice to a user end.

[0008] In another preferred embodiment, in S1, the first heat exchanger is connected with an external heating return water pipe, the hot water to be heat exchanged enters the first heat exchanger through the heating return water pipe and is heat exchanged with the high-temperature compressed air for the first time.

[0009] In another preferred embodiment, in S3, the second heat exchanger is connected with an external steam pipe, the steam to be heat exchanged enters the second heat exchanger through the steam pipe and is heat exchanged with the hot water after heat exchange for the second time.

[0010] In another preferred embodiment, an electric regulating valve is arranged between the second heat exchanger and the steam pipe.

[0011] In another preferred embodiment, in S4, the second heat exchanger is connected with an external heating water supply pipe, the hot water after secondary heat exchange is transported to the user end through the heating water supply pipe.

[0012] In another preferred embodiment, a remote thermometer is arranged on the heating water supply pipe, and the remote thermometer is connected with the electric regulating valve.

[0013] In another preferred embodiment, in S3, the steam after heat exchange is transported to a condensate water recovery system for recycling.

[0014] Compared with the prior art, the application has the following advantages: the application provides a method for utilizing compressed heat of an air compressor, which realizes efficient recovery and recycling of the compressed heat of the air compressor. The method utilizes the heat of the high-temperature compressed air and the hot water in the heating return water pipe to transfer and utilize the originally wasted heat, which provides heat energy for the hot water, improves energy utilization rate, reduces the demand for steam, reduces the consumption of energy such as coal and natural gas, and reduces energy cost and environmental pollution. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the overall structure of the application.

[0016] In the drawings:

[0017] 1, air compressor; 2, first heat exchanger; 3, cooler; 4, compressed air post-processing system; 5, second heat exchanger; 6, steam pipe; 7, heating water supply pipe; 8, heating return water pipe; 9, electric regulating valve; 10, remote thermometer; 11, condensate water recovery system. DETAILED DESCRIPTION

[0018] The technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0019] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "up", "down", "left", "right", "inner", "outer", "front", "back", "transverse", "vertical" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the device or element referred to must have a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0020] It should be particularly pointed out that "horizontal" and "vertical" in the present application are used to illustrate the approximate positional relationship, rather than a strict "horizontal plane" or "vertical plane".

[0021] As shown in Figure 1 , a method for utilizing air compressor compression heat is shown, which comprises the following steps:

[0022] S1: The high-temperature compressed air compressed by the air compressor 1 is directly connected to the first heat exchanger 2 to perform first heat exchange with the hot water to be heat-exchanged in the first heat exchanger 2;

[0023] S2: The heat-exchanged compressed air is discharged into the cooler 3 and cooled to a working temperature required by the compressed air post-processing system 4, and then delivered to the compressed air post-processing system 4; the compressed air after heat exchange in the first heat exchanger 2, although the temperature is reduced, may still be higher than the working temperature required by the compressed air post-processing system 4, so it needs to be discharged into the cooler 3, which can use appropriate cooling methods such as air cooling or water cooling to further cool the compressed air, and when the compressed air reaches the appropriate temperature, it is delivered to the compressed air post-processing system 4, in which a series of processing procedures such as drying and filtering are performed to remove water and impurities in the compressed air, and finally the compressed air meeting the low dew point requirement of the user end 7 is obtained to meet the demand for high-quality compressed air in industrial production or other use scenarios;

[0024] S3: The hot water after heat exchange in the first heat exchanger 2 is delivered to the second heat exchanger 5 to perform second heat exchange with the steam in the steam pipe 6 to be heat-exchanged;

[0025] S4: The hot water after second heat exchange is delivered to the user end.

[0026] Further, as a preferred embodiment, in S1, the first heat exchanger 2 is connected with the external heating return water pipe 8, and the hot water to be heated enters the first heat exchanger 2 through the heating return water pipe 8 and is subjected to first heat exchange with the high-temperature compressed air. Further, in the process of first heat exchange, a large amount of heat energy carried by the high-temperature compressed air is transferred to the hot water to be heated, so that the temperature of the high-temperature compressed air is reduced, and the temperature of the hot water is increased.

[0027] Further, as a preferred embodiment, in S3, the second heat exchanger 5 is connected with the external steam pipe 6, and the steam to be heated enters the second heat exchanger 5 through the steam pipe 6 and is subjected to second heat exchange with the hot water after heat exchange. Further, in the process of second heat exchange, the steam transfers its heat to the hot water, so that the temperature of the steam is reduced, and the temperature of the hot water is further increased.

[0028] Further, as a preferred embodiment, the electric regulating valve 9 is arranged between the second heat exchanger 5 and the steam pipe 6. Further, the electric regulating valve 9 can accurately control the flow of steam entering the second heat exchanger 5 according to the actual situation. When the temperature of the hot water in the second heat exchanger 5 is too high, the electric regulating valve 9 can reduce the opening degree to reduce the amount of steam entering. When the temperature of the hot water in the second heat exchanger 5 is too low, the electric regulating valve 9 can increase the opening degree to increase the amount of steam entering.

[0029] Further, as a preferred embodiment, in S4, the second heat exchanger 5 is connected with the external heating water supply pipe 7, and the hot water after secondary heat exchange is delivered to the user end through the heating water supply pipe 7.

[0030] Further, as a preferred embodiment, the heating water supply pipe 7 is provided with a remote thermometer 10, and the remote thermometer 10 is connected with the electric regulating valve 9. Further, the remote thermometer 11 is used to monitor the temperature of the hot water after secondary heat exchange in real time, and feed back the temperature signal to the electric regulating valve 9 connected therewith. When the remote thermometer 11 detects that the temperature of the hot water is too high or too low, the electric regulating valve 9 will adjust the flow of steam accordingly, so as to change the heat exchange degree of the hot water in the second heat exchanger 5, so that the temperature of the hot water is always kept within a proper range, and the hot water delivered to the user end can stably meet the use demand.

[0031] Further, as a preferred embodiment, in S3, the steam after heat exchange is delivered to the condensate water recovery system 12 for recycling. Further, after the second heat exchange is completed, the steam releases heat and can condense into water. These condensed water is delivered to the condensate water recovery system 12 for recycling. The condensate water recovery system 12 processes the condensed water, so that it can be reused as production water or other purposes, thereby being beneficial to further improve the comprehensive utilization rate of energy and reduce the waste of water resources.

[0032] The above merely describes preferred embodiments of the present application, and is not intended to limit the implementation and protection scope of the present application. Those skilled in the art should be able to understand that any equivalent substitutions and obvious changes made according to the present application description and drawings should be included in the protection scope of the present application.

Claims

1. A method for utilizing air compressor compression heat, characterized by, The method comprises the following steps: S1: high-temperature compressed air compressed by an air compressor is directly connected to a first heat exchanger to perform first heat exchange with hot water to be heat-exchanged in the first heat exchanger; S2: the heat-exchanged compressed air is discharged to a cooler, cooled to a working temperature of a compressed air post-processing system, and then delivered to the compressed air post-processing system; S3: the hot water whose heat exchange is completed in the first heat exchanger is delivered to a second heat exchanger to perform second heat exchange with steam in a steam pipe to be heat-exchanged; S4: the hot water whose heat exchange is completed twice is delivered to a user end.

2. The method of claim 1, wherein, In S1, the first heat exchanger is connected with an external heating return water pipe, and the hot water to be heat-exchanged enters the first heat exchanger through the heating return water pipe and performs first heat exchange with the high-temperature compressed air.

3. The method of air compressor compression heat utilization according to claim 1, characterized in that, In S3, the second heat exchanger is connected with an external steam pipe, and the steam to be heat-exchanged enters the second heat exchanger through the steam pipe and performs second heat exchange with the hot water whose heat exchange is completed.

4. The method of air compressor compression heat utilization according to claim 3, characterized in that, An electric regulating valve is arranged between the second heat exchanger and the steam pipe.

5. The method of air compressor compression heat utilization according to claim 4, characterized in that, In S4, the second heat exchanger is connected with an external heating water supply pipe, and the hot water whose heat exchange is completed twice is delivered to the user end through the heating water supply pipe.

6. The method of air compressor compression heat utilization according to claim 5, wherein, A remote thermometer is arranged on the heating water supply pipe, and the remote thermometer is connected with the electric regulating valve.

7. The method of air compressor compression heat utilization according to claim 1, wherein, In S3, the steam whose heat exchange is completed is delivered to a condensate water recovery system for recycling.

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