Air compressor waste heat recovery system for large-area building

Abstract

The invention relates to the technical field of waste heat recovery, in particular to an air compressor waste heat recovery system for a large-area building, which comprises air compressor equipment and a pump body, one side of the air compressor equipment is communicated with an exhaust pipe for exhaust gas emission, and the other end of the exhaust pipe is communicated with an exhaust funnel; a heat exchange mechanism used for waste heat recovery is arranged on the outer side of the exhaust barrel, one part of the outer side of the exhaust pipe is exposed, and a heat pretreatment mechanism is further arranged on the outer side of the exposed exhaust pipe. When exhausted, waste gas passes through fan blades, the fan blades can drive a rotating shaft to rotate, a supporting plate and a cleaning steel brush are made to rotate, the cleaning steel brush can clean the inner wall of the exhaust pipe, and it is ensured that internal heat can be subjected to heat early-stage exchange with water in a heat exchange pipe on the outer side through the exhaust pipe at the position; early-stage cooling of waste gas in the exhaust pipe is achieved, multi-section heat exchange is achieved, and it is ensured that heat in the waste gas is fully utilized.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery, and specifically to an air compressor waste heat recovery system for large-area buildings. Background Technique

[0002] In some large-area buildings, large air compressors are often required to compress air for refrigeration. When the large air compressor is in use, the utilization rate of the air compressor is not high, and a large amount of heat is generated. This part of the heat is directly discharged through the exhaust pipe, which will cause a waste of a large amount of heat resources and at the same time have an impact on the environment. In the prior art, there are also waste heat recovery mechanisms for air compressors, which use water bodies to contact the pipes for waste heat recovery. However, in the actual use process, the following disadvantages exist: The exhaust gas is not all air, but also carries a part of fixed impurities. After long-term pipeline transportation, the solid impurities adhere to the inner wall of the pipeline, and the gradual accumulation of solid impurities will affect the heat exchange efficiency between the water body and the inside of the pipeline; Using a simple water body to contact the pipeline for heat exchange, its exchange efficiency is low, and the heat recovery is often insufficient. The discharged exhaust gas will still have a certain temperature and carry impurities, and discharging it outdoors will have a certain impact on the surrounding environment. Therefore, an air compressor waste heat recovery system for large-area buildings is proposed for the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an air compressor waste heat recovery system for large-area buildings to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: As an optional solution of an air compressor waste heat recovery system for large-area buildings described in the present invention, wherein: an air compressor waste heat recovery system for large-area buildings includes an air compressor device and a pump body. One side of the air compressor device is connected to an exhaust pipe for exhaust gas discharge, the other end of the exhaust pipe is connected to an exhaust cylinder, and a heat exchange mechanism for waste heat recovery is arranged outside the exhaust cylinder; A heat preservation sleeve for heat preservation purposes is coated outside the exhaust pipe, and a one-way valve for unidirectional gas flow is also installed outside the exhaust pipe. A part of the outside of the exhaust pipe is exposed, and a heat pre-treatment mechanism is also arranged outside the exposed exhaust pipe; The output end of the pump body is connected to a first water pipe, the other end of the first water pipe is connected to a heat pre-treatment mechanism, and a second water pipe is also connected to one side of the heat pre-treatment mechanism, and the other end of the second water pipe is connected to an inclined pipe; The input end of the pump body is connected to a third water pipe, and a first solenoid valve is installed outside the third water pipe.

[0005] The inclined pipe is arranged in an arc shape.

[0006] The heat pre-treatment mechanism includes a sealing sleeve arranged outside the exhaust pipe. Both sides of the sealing sleeve are sealed with the exhaust pipe. A heat exchange pipe arranged in a spiral shape is provided inside the sealing sleeve. One end of the heat exchange pipe is communicated with a first water pipe, and the other end of the heat exchange pipe is communicated with a second water pipe; A support frame is fixedly connected inside the exhaust pipe inside the sealing sleeve. A rotating shaft is rotatably connected inside the support frame. A fan blade is fixedly connected to one end of the rotating shaft. Uniformly distributed support plates are fixedly connected to the outer side of the rotating shaft. The other end of the support plate is fixedly connected with a cleaning steel brush. The outer side of the cleaning steel brush is in close contact with the inner wall of the exhaust pipe.

[0007] As an alternative solution of the air compressor waste heat recovery system for large-area buildings described in the present invention, wherein: the support plates are arranged on both sides of the rotating shaft, and the support plates on both sides of the rotating shaft are arranged staggeredly.

[0008] As an alternative solution of the air compressor waste heat recovery system for large-area buildings described in the present invention, wherein: the number of support plates is multiple groups, and the support plates are all arranged in a T shape.

[0009] In some large-area buildings, large air compressors are often required to compress air for refrigeration. When the large air compressor is in use, the utilization rate of the air compressor is not high, and a large amount of heat is generated. This part of the heat is directly discharged through the exhaust pipe, which will cause a waste of a large amount of heat resources and will also have an impact on the environment. In the prior art, there is also a waste heat recovery mechanism for the air compressor, which uses water to contact the pipeline for waste heat recovery. However, in the actual use process, it has the following disadvantages: the exhaust gas is not all air, but also carries a part of fixed impurities. After long-term pipeline transportation, the solid impurities adhere to the inner wall of the pipeline, and the gradual accumulation of solid impurities will affect the heat exchange efficiency between the water body and the inside of the pipeline; using only water to contact the pipeline for heat exchange, its exchange efficiency is low, and the heat recovery is often insufficient. The discharged exhaust gas will still have a certain temperature and carry impurities, and discharging it outdoors will have a certain impact on the surrounding environment. A support plate and a cleaning steel brush are arranged inside the exhaust pipe. When the exhaust gas is discharged, it passes through the fan blade, and the fan blade can drive the rotating shaft to rotate, thereby driving the support plate and the cleaning steel brush to rotate. The cleaning steel brush can clean the inner wall of the exhaust pipe to ensure that the internal heat can be exchanged with the water body inside the heat exchange pipe outside through this part of the exhaust pipe in the early stage, realizing the pre-cooling of the exhaust gas inside the exhaust pipe, realizing multi-stage heat exchange, and ensuring that the heat in the exhaust gas is fully utilized. The exhaust gas inside the exhaust pipe can be continuously transported. When it is transported to the end, the exhaust gas is discharged from the bottom of the exhaust cylinder. At this time, it conducts contact heat exchange with the water body inside the inner insulation box and can filter the impurities in the exhaust gas, achieving the purpose of purifying the exhaust gas to a certain extent.

[0010] As an optional solution of the air compressor waste heat recovery system for large-area buildings described in the present invention, the outside of the third water pipe is connected to a fourth water pipe, the other end of the fourth water pipe is connected to a heat exchange mechanism, and a second solenoid valve is installed on the outside of the fourth water pipe.

[0011] When there is more water inside the outer insulation box, the first solenoid valve can be closed to achieve internal circulation of water for heat exchange. When there is less water inside the outer insulation box, the first solenoid valve can be opened and the second solenoid valve can be closed. At this time, external circulation of water can be achieved for heat exchange, and targeted adjustments can be made according to actual conditions.

[0012] As an optional solution of the air compressor waste heat recovery system for large-area buildings described in the present invention, the heat exchange mechanism includes a group of inner and outer insulation boxes arranged inside and outside, the top of the inner insulation box is fixedly connected to the outer insulation box, a mounting plate is installed on the top of the inner insulation box, and a blocking block fixedly connected to the inner wall of the outer insulation box is arranged below the mounting plate; An exhaust pipe is arranged on the inner side of the inner insulation box, and one side of the outer insulation box and the inner insulation box is fixedly connected to the exhaust pipe; One side of the inner heat preservation box is convex, and the outer side of one end of the protruding part is fixedly connected with the outer heat preservation box, the protruding part is hollow, and a sealing plug is installed inside the protruding end.

[0013] As an optional solution of the air compressor waste heat recovery system for large-area buildings described in the present invention, a filter layer evenly arranged up and down is installed inside the inner insulation box.

[0014] There are multiple groups of filter layers inside the inner insulation box, and the filter layer setting can further filter the exhaust gas to ensure the quality of the exhausted air; when the exhaust pipe is exhausting, its exhaust gas can impact the bottom of the inner insulation box to prevent solid impurities from adhering to the inner wall of the inner insulation box. When discharging the wastewater inside the inner insulation box, it can open the sealing plug to facilitate the smooth discharge of the wastewater, which is convenient for the recycling of equipment; when the pump body drives the water body to flow, the water body realizes the preliminary exchange of heat with the inside of the exhaust pipe through the heat exchange tube, and then the water body is discharged into the inclined tube. At this time, the water body inside the outer insulation box can be driven to stir, which is conducive to the heat exchange between the water body inside the outer insulation box and the water body inside the inner insulation box, and further realizes the waste heat recovery.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, a support plate and a cleaning steel brush are arranged inside the exhaust pipe. When the exhaust gas is discharged, it passes through the fan blades, which can drive the rotating shaft to rotate. As a result, the support plate and the cleaning steel brush rotate, and the cleaning steel brush can clean the inner wall of the exhaust pipe, ensuring that the internal heat can be exchanged with the water in the heat exchange pipe outside through this part of the exhaust pipe in the early stage, realizing the pre-cooling of the exhaust gas inside the exhaust pipe, achieving multi-stage heat exchange, and ensuring the full utilization of the heat in the exhaust gas; The exhaust gas inside the exhaust pipe can be continuously transported. When it is transported to the end, the exhaust gas is discharged through the bottom of the exhaust cylinder. At this time, it conducts contact heat exchange with the water inside the inner insulation box and can filter the impurities in the exhaust gas, achieving the purpose of purifying the exhaust gas to a certain extent; Multiple filter layers are arranged inside the inner insulation box. The filter layers can further filter the exhaust gas to ensure the quality of the discharged air; When the exhaust cylinder discharges exhaust gas, the exhaust gas can impact the bottom of the inner insulation box, preventing solid impurities from adhering to the inner wall of the inner insulation box. When discharging the wastewater inside the inner insulation box, it is convenient to discharge the wastewater smoothly by opening the sealing plug, facilitating the recycling of the equipment; When the pump drives the water to flow, the water conducts pre-exchange of heat with the heat inside the exhaust pipe through the heat exchange pipe, and then discharges the water into the inclined pipe. At this time, it can drive the water inside the outer insulation box to stir, which helps the water inside the outer insulation box to exchange heat with the water inside the inner insulation box, further realizing the recovery of waste heat; When there is more water inside the outer insulation box, it can close the first solenoid valve to realize the internal circulation of the water for heat exchange. When there is less water inside the outer insulation box, it can open the first solenoid valve and close the second solenoid valve. At this time, it can realize the external circulation of the water for heat exchange, and can be adjusted specifically according to the actual situation. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of an air compressor waste heat recovery system for large-area buildings as a whole; Figure 2 It is a schematic structural diagram of the heat exchange mechanism of an air compressor waste heat recovery system for large-area buildings; Figure 3 It is a schematic structural diagram of the inclined pipe of an air compressor waste heat recovery system for large-area buildings; Figure 4 It is a cross-sectional view of the exhaust pipe of an air compressor waste heat recovery system for large-area buildings; Figure 5 It is an air compressor waste heat recovery system for large-area buildings Figure 4 Schematic diagram of the structure at position A.

[0017] In the figure: 1, air compressor equipment; 2, exhaust pipe; 3, check valve; 4, heat preservation sleeve; 5, heat exchange mechanism; 501, outer heat preservation box; 502, inner heat preservation box; 503, filter layer; 504, mounting plate; 505, blocking block; 506, sealing plug; 6, sealing sleeve; 7, pump body; 8, first water pipe; 9, heat exchange pipe; 10, second water pipe; 11, third water pipe; 12, first solenoid valve; 13, fourth water pipe; 14, second solenoid valve; 15, inclined pipe; 16, exhaust stack; 17, support frame; 18, rotating shaft; 19, fan blade; 20, support plate; 21, cleaning steel brush. Detailed implementation mode

[0018] Example 1: Please refer to Figure 1 , Figure 3 and Figure 4 , the present invention provides a technical solution: An air compressor waste heat recovery system for large-area buildings, including air compressor equipment 1 and pump body 7. One side of the air compressor equipment 1 is connected to an exhaust pipe 2 for exhaust gas discharge. The other end of the exhaust pipe 2 is connected to an exhaust stack 16. The outside of the exhaust stack 16 is provided with a heat exchange mechanism 5 for waste heat recovery; The outside of the exhaust pipe 2 is coated with a heat preservation sleeve 4 for heat preservation purposes. A check valve 3 for unidirectional gas flow is also installed on the outside of the exhaust pipe 2. A part of the outside of the exhaust pipe 2 is exposed. A heat pre-treatment mechanism is also provided on the exposed outside of the exhaust pipe 2; The output end of the pump body 7 is connected to a first water pipe 8. The other end of the first water pipe 8 is connected to a heat pre-treatment mechanism. One side of the heat pre-treatment mechanism is also connected to a second water pipe 10. The other end of the second water pipe 10 is connected to an inclined pipe 15; The input end of the pump body 7 is connected to a third water pipe 11. A first solenoid valve 12 is installed on the outside of the third water pipe 11.

[0019] The inclined pipe 15 is arranged in an arc shape.

[0020] The heat pre-treatment mechanism includes a sealing sleeve 6 arranged on the outside of the exhaust pipe 2. Both sides of the sealing sleeve 6 are hermetically arranged with the exhaust pipe 2. A helically arranged heat exchange pipe 9 is arranged inside the sealing sleeve 6. One end of the heat exchange pipe 9 is connected to the first water pipe 8, and the other end of the heat exchange pipe 9 is connected to the second water pipe 10; A support frame 17 is fixedly connected to the inside of the exhaust pipe 2 inside the sealing sleeve 6. A rotating shaft 18 is rotatably connected to the inside of the support frame 17. One end of the rotating shaft 18 is fixedly connected to a fan blade 19. Uniformly distributed support plates 20 are fixedly connected to the outside of the rotating shaft 18. The other end of the support plate 20 is fixedly connected to a cleaning steel brush 21. The outside of the cleaning steel brush 21 is in close contact with the inner wall of the exhaust pipe 2.

[0021] The support plates 20 are arranged on both sides of the rotating shaft 18, and the support plates 20 on both sides of the rotating shaft 18 are staggeredly arranged.

[0022] The number of the support plates 20 is multiple groups, and the support plates 20 are all arranged in a T shape.

[0023] In some large-area buildings, large air compressors are often needed to compress air for refrigeration. When the large air compressor is in use, the utilization rate of the air compressor is not high, and a large amount of heat will be generated. This part of the heat is directly discharged through the exhaust pipe, which will cause a waste of a large amount of heat resources and at the same time have an impact on the environment. In the prior art, there is also a waste heat recovery mechanism for the air compressor, which uses water to contact the pipeline for waste heat recovery. However, in the actual use process, it has the following disadvantages: the exhaust gas is not all air, but also carries a part of fixed impurities. After long-term pipeline transportation, the solid impurities adhere to the inner wall of the pipeline, and the gradual accumulation of solid impurities will affect the heat exchange efficiency between the water body and the inside of the pipeline; using only water to contact the pipeline for heat exchange, its exchange efficiency is low, and the heat recovery is often insufficient. The discharged exhaust gas will still have a certain temperature and carry impurities, and discharging it outdoors will have a certain impact on the surrounding environment. The exhaust pipe 2 is internally provided with support plates 20 and cleaning steel brushes 21. When the exhaust gas is discharged, it passes through the fan blades 19, and the fan blades 19 can drive the rotating shaft 18 to rotate, so that the support plates 20 and the cleaning steel brushes 21 rotate. The cleaning steel brushes 21 can clean the inner wall of the exhaust pipe 2 to ensure that the internal heat can pass through this part of the exhaust pipe 2 and the water body inside the heat exchange pipe 9 on the outside for preliminary heat exchange, realizing the preliminary cooling of the exhaust gas inside the exhaust pipe 2, realizing multi-stage heat exchange, and ensuring that the heat in the exhaust gas is fully utilized. The exhaust gas inside the exhaust pipe 2 can be continuously transported. When it is transported to the end, the exhaust gas is discharged from the bottom of the exhaust cylinder 16. At this time, it conducts contact heat exchange with the water body inside the inner heat preservation box 502 and can filter the impurities in the exhaust gas, achieving the purpose of purifying the exhaust gas to a certain extent; In this embodiment, a one-way valve 3 is arranged on the outside of the exhaust pipe 2, which can ensure that the exhaust gas can only flow in one direction and prevent the water body from flowing back and affecting the use of the equipment. A heat preservation sleeve 4 is arranged on the outside of the exhaust pipe 2 to prevent heat loss and cause waste of resources; The arrangements of the first water pipe 8 and the second water pipe 10 can ensure that the water body moves against the air flow direction of the exhaust pipe 2, and this arrangement can ensure efficient heat exchange of the exhaust gas heat inside the exhaust pipe 2; The inner side of the heat exchange pipe 9 is in close contact with the exhaust pipe 2, so as to realize full heat exchange.

[0024] Embodiment 2: This embodiment is an improvement made to Embodiment 1. Please refer to Figure 1Specifically, the outer side of the third water pipe 11 is connected to the fourth water pipe 13 , the other end of the fourth water pipe 13 is connected to the heat exchange mechanism 5 , and the outer side of the fourth water pipe 13 is installed with a second solenoid valve 14 .

[0025] The settings of the first solenoid valve 12 and the second solenoid valve 14 can change the delivery of different water bodies by switching with each other, so as to achieve the purpose of water replenishment and waste heat recovery. When there is more water inside the outer insulation box 501, the first solenoid valve 12 can be closed to achieve internal circulation of the water body for heat exchange. When there is less water inside the outer insulation box 501, the first solenoid valve 12 can be opened and the second solenoid valve 14 can be closed. At this time, external circulation of water body can be achieved for heat exchange, and targeted adjustments can be made according to actual conditions.

[0026] Example 3: This example is an improvement on Example 2. Figure 2 Specifically, the heat exchange mechanism 5 includes a group of inner insulation box 502 and outer insulation box 501 arranged inside and outside, the top of the inner insulation box 502 is fixedly connected to the outer insulation box 501, a mounting plate 504 is installed on the top of the inner insulation box 502, and a blocking block 505 fixedly connected to the inner wall of the outer insulation box 501 is arranged below the mounting plate 504; An exhaust pipe 16 is provided on the inner side of the inner insulation box 502, and one side of the outer insulation box 501 and the inner insulation box 502 is fixedly connected to the exhaust pipe 2; One side of the inner heat-insulating box 502 is protruding, and the outer side of one end of the protruding part is fixedly connected to the outer heat-insulating box 501. The protruding part is hollow, and a sealing plug 506 is installed inside the protruding end.

[0027] The inner heat preservation box 502 is internally provided with filter layers 503 evenly arranged up and down.

[0028] A plurality of filter layers 503 are arranged inside the inner heat preservation box 502, and the filter layers 503 can further filter the exhaust gas to ensure the exhaust air quality; When the exhaust pipe 16 is exhausting, the exhaust gas can impact the bottom of the inner insulation box 502 to prevent solid impurities from adhering to the inner wall of the inner insulation box 502. When the waste water inside the inner insulation box 502 is discharged, the sealing plug 506 can be opened to facilitate the smooth discharge of the waste water, which is convenient for the recycling of the equipment. When the pump body 7 drives the water to flow, the water exchanges heat with the exhaust pipe 2 through the heat exchange pipe 9, and then discharges the water into the inclined pipe 15. At this time, the water in the outer insulation box 501 can be stirred, which helps the water in the outer insulation box 501 to exchange heat with the water in the inner insulation box 502, thereby further realizing waste heat recovery. When the waste gas agitates the water body inside the inner heat preservation box 502 to roll, the water body will adhere to the surface of the filter layer 503, and the filter layer 503 with the water body has a better treatment effect on the waste gas.

[0029] In this article, specific examples are used to elaborate on the principle and implementation mode of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above description is only the preferred implementation mode of the present invention. It should be noted that due to the limited nature of literal expression and the objectively infinite specific structures, for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present invention.

Claims

1. An air compressor waste heat recovery system for large-area buildings, characterized in that: It includes an air compressor device (1) and a pump body (7). One side of the air compressor device (1) is connected to an exhaust pipe (2) for exhaust gas discharge. The other end of the exhaust pipe (2) is connected to an exhaust chimney (16). A heat exchange mechanism (5) for waste heat recovery is arranged outside the exhaust chimney (16); A heat preservation sleeve (4) for heat preservation purposes is coated on the outside of the exhaust pipe (2). A one-way valve (3) for unidirectional gas flow is also installed on the outside of the exhaust pipe (2). A part of the outside of the exhaust pipe (2) is exposed. A heat pre-treatment mechanism is also arranged on the outside of the exposed exhaust pipe (2); The output end of the pump body (7) is connected to a first water pipe (8). The other end of the first water pipe (8) is connected to a heat pre-treatment mechanism. A second water pipe (10) is also connected to one side of the heat pre-treatment mechanism. The other end of the second water pipe (10) is connected to an inclined pipe (15); The input end of the pump body (7) is connected to a third water pipe (11). A first solenoid valve (12) is installed on the outside of the third water pipe (11).

2. The air compressor waste heat recovery system for large-area buildings according to claim 1, wherein: The inclined pipe (15) is arranged in an arc shape.

3. The air compressor waste heat recovery system for large-area buildings according to claim 1, wherein: A fourth water pipe (13) is connected to the outside of the third water pipe (11). The other end of the fourth water pipe (13) is connected to the heat exchange mechanism (5). A second solenoid valve (14) is installed on the outside of the fourth water pipe (13).

4. The air compressor waste heat recovery system for large-area buildings according to claim 1, characterized in that: The heat exchange mechanism (5) includes an inner heat preservation box (502) and an outer heat preservation box (501) arranged inside and outside. The top of the inner heat preservation box (502) is fixedly connected to the outer heat preservation box (501). An installation plate (504) is installed on the top of the inner heat preservation box (502). A blocking block (505) fixedly connected to the inner wall of the outer heat preservation box (501) is arranged below the installation plate (504); The exhaust chimney (16) is arranged inside the inner heat preservation box (502). One side of the outer heat preservation box (501) and the inner heat preservation box (502) is fixedly connected to the exhaust pipe (2); One side of the inner heat preservation box (502) is protruded, and the outer side of one end of the protruded part is fixedly connected to the outer heat preservation box (501). The protruded part is hollow. A sealing plug (506) is also installed inside the protruded end.

5. The air compressor waste heat recovery system for large-area buildings according to claim 4, characterized in that: A filter layer (503) evenly arranged up and down is installed inside the inner heat preservation box (502).

6. The air compressor waste heat recovery system for large-area buildings according to claim 1, characterized in that: The heat pre-treatment mechanism includes a sealing sleeve (6) arranged on the outside of the exhaust pipe (2). Both sides of the sealing sleeve (6) are hermetically arranged with the exhaust pipe (2). A heat exchange pipe (9) arranged in a spiral shape is arranged inside the sealing sleeve (6). One end of the heat exchange pipe (9) is connected to the first water pipe (8). The other end of the heat exchange pipe (9) is connected to the second water pipe (10); A support frame (17) is fixedly connected inside the exhaust pipe (2) within the sealing sleeve (6). A rotating shaft (18) is rotatably connected inside the support frame (17). One end of the rotating shaft (18) is fixedly connected with a fan blade (19). Uniformly distributed support plates (20) are fixedly connected to the outer side of the rotating shaft (18). The other end of the support plate (20) is fixedly connected with a cleaning steel brush (21), and the outer side of the cleaning steel brush (21) is in close contact with the inner wall of the exhaust pipe (2).

7. The air compressor waste heat recovery system for large-area buildings according to claim 6, wherein: The support plates (20) are arranged on both sides of the rotating shaft (18), and the support plates (20) on both sides of the rotating shaft (18) are arranged staggeredly.

8. An air compressor waste heat recovery system for large-area buildings according to claim 6, characterized in that: The number of the support plates (20) is multiple groups, and the support plates (20) are all arranged in a T shape.

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