Industrial waste gas waste heat recovery heat exchange mechanism and working method thereof

Abstract

The application provides an industrial waste gas waste heat recovery heat exchange mechanism and a working method thereof, relates to the technical field of environmental protection production equipment, and improves the internal structure of the original heat exchanger, replaces the original single-tube heat exchange pipe structure with a self-breathing heat exchange pipe, and cooperates with a pump machine capable of performing power conversion in real time, utilizes the continuous extrusion and stretching effect of the self-breathing membrane part of the self-breathing heat exchange pipe under the wave type progressive spray liquid hydraulic action, greatly reduces the possibility of a large amount of scale accumulation on the inner wall of the self-breathing heat exchange pipe in a long time heat conversion process, guarantees the heat conversion efficiency in a long time working process, and is particularly suitable for spray liquid and other heat fluid heat conversion operations with complex components and extremely easy scale accumulation in the heat conversion process. The heat exchanger assembly mechanism used in cooperation with the self-breathing heat exchange pipe can achieve good waste heat recovery effect on industrial waste gas.

Description

Technical Field

[0001] This invention relates to the field of environmental protection production equipment technology, and in particular to an industrial waste gas waste heat recovery heat exchange mechanism and its working method. Background Technology

[0002] Industrial waste gas refers to the general term for various pollutant-containing gases emitted into the air during fuel combustion and production processes within a factory premises. These waste gases include: carbon dioxide, carbon disulfide, hydrogen sulfide, fluorides, nitrogen oxides, chlorine, hydrogen chloride, carbon monoxide, sulfuric acid (mist), lead, mercury, beryllium compounds, soot, and industrial dust. When released into the atmosphere, they pollute the air.

[0003] Currently, spray towers are used to purify industrial waste gas, which can achieve good purification results. In order to recover and utilize the waste heat in the industrial waste gas, the spray liquid containing the waste heat of the industrial waste gas can be connected to a heat exchanger through a pipeline. The waste heat can be recovered and utilized through the heat conversion between the hot and cold fluids in the heat exchanger.

[0004] The shortcomings of the existing technology are as follows: Due to the complex composition of the spray liquid after the purification operation, it enters the heat exchanger tubes. During the long-term heat exchange operation, a large amount of scale is easily generated on the inner wall of the heat exchanger tubes, which greatly reduces the heat exchange efficiency. It is necessary for the staff to shut down the heat exchanger for cleaning, and the heat exchanger tubes need to be pulled out during cleaning, which is very troublesome. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an industrial waste gas waste heat recovery heat exchange mechanism and its working method to solve the problems existing in the background art.

[0006] To address the aforementioned technical problems, this invention provides an industrial waste gas waste heat recovery heat exchange mechanism and its operating method, comprising a heat exchanger assembly. The heat exchanger assembly is provided with a first connecting pipe, a second connecting pipe, a third connecting pipe, a fourth connecting pipe, a pair of tube sheets, and other necessary components. The first connecting pipe is externally connected to a pump capable of real-time power conversion. Multiple self-breathing heat exchange tubes are inserted between the pair of tube sheets. Each self-breathing heat exchange tube includes a tube shell, a self-breathing membrane, a first threaded tube, and a second threaded tube. The tube shell is inserted between the pair of tube sheets. Connecting threads are provided on both the left and right sides of the inner end wall of the tube sheets. The first threaded tube is connected to the tube shell via connecting threads. Connecting threads are also provided on the inner end wall of the first threaded tube. The second threaded tube is connected to the first threaded tube via connecting threads. The self-breathing membrane is disposed inside the tube shell and is clamped at both its left and right ends by the first and second threaded tubes. A certain gap is left between the self-breathing membrane and the tube shell, and the gap is filled with a heat-conducting liquid.

[0007] Preferably, both the first threaded tube and the second threaded tube have injection screw holes at their ends away from the tube shell, and a sealing long screw is threaded into the injection screw hole.

[0008] Preferably, the heat-conducting fluid may be made of a colored, component-stabilized liquid.

[0009] Preferably, a sealing detection device is provided on the left side of the self-breathing heat exchange tube. An air inlet pipe is fixedly installed at the left end of the sealing detection device, and an air outlet pipe is fixedly installed at the right end of the sealing detection device. A pressure sensor is embedded in the inner end wall of the air outlet pipe. After the sealing detection device and the self-breathing heat exchange tube are connected, the air outlet pipe passes through the filling screw hole and extends into the gap left between the tube shell and the self-breathing membrane.

[0010] Preferably, an airflow sensor is fixedly installed at the middle of the right end of the sealing detection device.

[0011] Preferably, the second threaded tube and the first threaded tube are respectively fixedly connected to an annular cutting blade and have an annular cutting groove at one end close to each other, and the annular cutting blade and the annular cutting groove are simultaneously connected after the first threaded tube and the second threaded tube are connected.

[0012] Preferably, the self-breathing membrane is supported by a corrosion-resistant and tensile-strength material.

[0013] A method for operating an industrial waste gas waste heat recovery heat exchanger includes the following steps:

[0014] S1. Pipeline assembly: Connect the first connecting pipe to the pump that can change power in real time, and then complete the assembly with the spray tower.

[0015] S2, Hydraulic conversion: The pump propels the hot fluid of the spray liquid in a wave-like manner within the self-breathing heat exchange tube, and recovers waste heat.

[0016] S3. Surface deformation: The wave-like spray liquid heat fluid squeezes and stretches the self-breathing membrane part of the self-breathing heat exchange tube, reducing the possibility of scale buildup and reduced heat conversion efficiency during long-term heat conversion.

[0017] S4. Synchronous detection: After the waste heat recovery is completed, if necessary, the shell and self-breathing membrane of the self-breathing heat exchange tube can be simultaneously detected by a sealing detection device.

[0018] Compared with the prior art, the present invention provides an industrial waste gas waste heat recovery heat exchange mechanism and its working method, which has the following beneficial effects:

[0019] 1. This invention improves the internal structure of the original heat exchanger by replacing the original single-tube heat exchanger with a self-breathing heat exchanger. Working in conjunction with a pump capable of real-time power conversion, the self-breathing membrane of the heat exchanger is continuously squeezed and stretched under the hydraulic pressure of the wave-like spray liquid. This significantly reduces the likelihood of scale buildup on the inner wall of the heat exchanger during long-term heat conversion, ensuring high heat conversion efficiency over extended periods. The product is particularly suitable for heat conversion operations involving complex fluids such as spray liquids, where scale buildup is highly likely. The heat exchanger assembly using the self-breathing heat exchanger achieves excellent waste heat recovery from industrial exhaust gases. Even if the heat exchanger needs to be removed for cleaning, only the self-breathing membrane needs to be replaced and the heat transfer fluid re-injected; continuous cleaning of the inner wall of the heat exchanger is unnecessary, making cleaning operations very simple.

[0020] 2. After the first and second threaded tubes are stably clamped together at the left and right ends of the self-breathing membrane, the gap between the tube shell and the self-breathing membrane is actually a sealed space. By injecting detection gas into the sealed gap through the sealing detection device, the airtightness of the tube shell is detected. When the tube shell is damaged, the pressure sensor installed in the outlet pipe will not be triggered. The operator can use this to determine whether the tube shell is damaged, so that the operator can quickly locate the damaged tube shell, which greatly improves the detection and replacement efficiency of the self-breathing heat exchange tube. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a partial sectional view of the entire invention;

[0023] Figure 3 yes Figure 2 A schematic diagram of the structure at point A;

[0024] Figure 4 This is a diagram illustrating the assembly process of the self-breathing heat exchanger tube after partial sectional section of the present invention.

[0025] Figure 5 yes Figure 4 A schematic diagram of the structure at point B;

[0026] Figure 6 This is a partial sectional front view of the entire invention;

[0027] Figure 7 yes Figure 6 A schematic diagram of the structure at point C;

[0028] Figure 8 This is a diagram illustrating the simultaneous detection process of the sealing detection device of the present invention on the tube shell and the self-breathing membrane;

[0029] Figure 9 This is a flowchart of the process of the present invention.

[0030] In the diagram: 1. Heat exchanger assembly; 2. First connecting pipe; 3. Second connecting pipe; 4. Third connecting pipe; 5. Fourth connecting pipe; 6. Tube sheet; 7. Self-breathing heat exchange tube; 701. Tube shell; 702. Self-breathing membrane; 703. First threaded tube; 704. Second threaded tube; 8. Filling screw hole; 9. Sealing long screw; 10. Annular cutting blade; 11. Annular cutting groove; 12. Sealing detection device; 13. Inlet pipe; 14. Outlet pipe; 15. Airflow sensor. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The industrial waste gas waste heat recovery heat exchange mechanism and its working method involved in the present invention are not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] This invention provides an industrial waste gas waste heat recovery heat exchange mechanism and its working method. Please refer to [link / reference]. Figure 1-5 The system includes a heat exchanger assembly 1, which is equipped with a first connecting pipe 2, a second connecting pipe 3, a third connecting pipe 4, a fourth connecting pipe 5, a pair of tube sheets 6, and other necessary components. The first connecting pipe 2 is externally connected to a pump capable of real-time power conversion. Multiple self-breathing heat exchange tubes 7 are inserted between the pair of tube sheets 6. Each self-breathing heat exchange tube 7 includes a tube shell 701, a self-breathing membrane 702, a first threaded tube 703, and a second threaded tube 704. The tube shell 701 is inserted between the pair of tube sheets 6. The inner end wall of the tube sheet 6... Both sides are provided with connecting threads. The first threaded tube 703 is connected to the shell 701 through the connecting threads. The inner end wall of the first threaded tube 703 is also provided with connecting threads. The second threaded tube 704 is connected to the first threaded tube 703 through the connecting threads. The self-breathing membrane 702 is set inside the shell 701 and is clamped at both ends by the first threaded tube 703 and the second threaded tube 704. A certain gap is left between the self-breathing membrane 702 and the shell 701, and the gap is filled with heat-conducting liquid.

[0033] For further details, please refer to Figure 2-5 Both the first threaded tube 703 and the second threaded tube 704 have a filling screw hole 8 at the end away from the tube shell 701. A sealing long screw 9 is connected to the internal thread of the filling screw hole 8. The heat transfer fluid is poured into the gap left between the tube shell 701 and the self-breathing membrane 702 through the filling screw hole 8. After the filling is completed, the filling screw hole 8 can be sealed by the sealing long screw 9.

[0034] For further details, please refer to Figure 2-3 The heat transfer fluid can be made of a colored, stable liquid. This is to prevent scale buildup in the heat transfer fluid during long-term heat exchange. On the other hand, if the shell 701 is damaged during long-term use, the colored heat transfer fluid will seep into the cold fluid and be discharged along with it. By observing the color change of the cold fluid, the operator can quickly determine whether the shell 701 is damaged in the heat exchanger assembly 1, so as to stop the machine for maintenance in a timely manner.

[0035] For further details, please refer to Figure 6-8 A sealing detection device 12 is provided on the left side of the self-breathing heat exchange tube 7. An air inlet pipe 13 is fixedly installed at the left end of the sealing detection device 12, and an air outlet pipe 14 is fixedly installed at the right end of the sealing detection device 12. A pressure sensor is embedded in the inner wall of the air outlet pipe 14. After the sealing detection device 12 and the self-breathing heat exchange tube 7 are connected, the air outlet pipe 14 passes through the filling screw hole 8 and extends into the gap left between the tube shell 701 and the self-breathing membrane 702. A pair of first threaded pipes 703 and second threaded pipes 704 are located on the left side of the self-breathing membrane 702. After the right end is stably clamped, the gap between the shell 701 and the self-breathing membrane 702 is actually a sealed space. The sealing detection device 12 injects detection gas into the sealed space to detect the sealing performance of the shell 701. When the shell 701 is damaged, the pressure sensor installed in the outlet pipe 14 will not be triggered. The operator can use this to determine whether the shell 701 is damaged, so that the operator can quickly locate the damaged shell 701, which greatly improves the detection and replacement efficiency of the self-breathing heat exchange tube 7.

[0036] For further details, please refer to Figure 8 An airflow sensor 15 is fixedly installed at the middle of the right end of the sealing detection device 12. Not only will the shell 701 be damaged during long-term operation, but the self-breathing membrane 702 may also be damaged during long-term operation. The detection airflow injected into the gap from the air outlet 14 can not only detect the damage to the shell 701, but also, when the self-breathing membrane 702 is damaged, the detection airflow can enter the self-breathing membrane 702 through the damaged outlet. In the self-breathing membrane 702, part of it reflects to the left and part of it reflects to the right. The detection airflow that reflects to the left can be detected by the airflow sensor 15, which indicates that the self-breathing membrane 702 in the self-breathing heat exchange tube 7 being tested is damaged. By simultaneously detecting the damage to the shell 701 and the self-breathing membrane 702 of the self-breathing heat exchange tube 7 by the sealing detection device 12, the efficiency of detection and replacement of the self-breathing heat exchange tube 7 is further improved.

[0037] For further details, please refer to Figure 2-5The second threaded tube 704 and the first threaded tube 703 are respectively fixedly connected to an annular cutting blade 10 and an annular cutting groove 11 at one end close to each other. The annular cutting blade 10 and the annular cutting groove 11 are connected synchronously after the first threaded tube 703 and the second threaded tube 704 are connected. After the annular cutting blade 10 and the annular cutting groove 11 are connected, they can cut the excess part of the self-breathing membrane 702 after the first threaded tube 703 and the second threaded tube 704 are clamped together. There is no need for the operator to use external tools to cut. The cut is neat and improves the overall assembly efficiency of the self-breathing heat exchange tube 7.

[0038] For further details, please refer to Figure 2-3 The self-breathing membrane 702 is supported by corrosion-resistant and tensile-strength materials, which effectively reduces the possibility of corrosion and damage to the self-breathing membrane 702 by the spray liquid after the purification operation.

[0039] For further details, please refer to Figure 9 A working method for an industrial waste gas waste heat recovery heat exchanger includes the following steps:

[0040] S1. Pipeline assembly: Connect the first connecting pipe 2 to the pump that can change power in real time, and then complete the assembly with the spray tower.

[0041] S2, Hydraulic conversion: The pump propels the hot fluid of the spray liquid in a wave-like manner within the self-breathing heat exchange tube 7, and recovers waste heat.

[0042] S3. Surface deformation: The wave-like spray liquid heat fluid squeezes and stretches the self-breathing membrane 702 of the self-breathing heat exchange tube 7, reducing the possibility of scale buildup and reduced heat conversion efficiency during long-term heat conversion.

[0043] S4. Synchronous Detection: After waste heat recovery is completed, if necessary, the shell 701 and the self-breathing membrane 702 of the self-breathing heat exchange tube 7 can be simultaneously detected by the sealing detection device 12.

[0044] Working principle and usage process of this invention:

[0045] When using it, please refer to Figure 1-5 The operator connects a pump capable of real-time power conversion to the first connector 2, and then connects the pump to the spray tower. The spray liquid, which has completed the purification operation and carries the waste heat of industrial waste gas, is pumped into the heat exchanger assembly 1 as a hot fluid. The hot fluid enters from the first connector 2 into multiple self-breathing heat exchange tubes 7 distributed on the upper side, and then sprays out from multiple self-breathing heat exchange tubes 7 distributed on the lower side. Finally, it is discharged through the second connector 3. During this process, the cold fluid is pumped into the heat exchanger assembly 1 from the third connector 4 and pumped out from the fourth connector 5, and undergoes a non-contact heat exchange with the hot fluid, ultimately recovering and carrying away the heat of the hot fluid.

[0046] During the process of the spray liquid entering the self-breathing heat exchange tube 7, it actually comes into direct contact with the self-breathing membrane 702 of the self-breathing heat exchange tube 7. At this time, the pump, which can perform real-time power conversion, comes into play and pumps the spray liquid into the self-breathing heat exchange tube 7. The hydraulic pressure of the spray liquid in direct contact with the self-breathing membrane 702 changes continuously during its flow, and it advances in a wave-like manner in the self-breathing heat exchange tube 7, causing the self-breathing membrane 702 to be continuously squeezed and stretched, making it difficult for the scale generated during the heat conversion process to accumulate inside the self-breathing membrane 702. Therefore, to ensure heat conversion efficiency, there is no need to frequently shut down the heat exchanger assembly 1 and remove and clean the self-breathing heat exchange tube 7. Moreover, the heat-conducting fluid filling the gap between the tube shell 701 and the self-breathing membrane 702 can not only offset the reduction in heat conversion efficiency caused by the gap between the tube shell 701 and the self-breathing membrane 702, but also make the compression and stretching effect of the self-breathing membrane 702 more obvious by the free flow of the heat-conducting fluid in the gap, further reducing the possibility of scale accumulation on the inner wall of the self-breathing membrane 702.

[0047] This invention improves the internal structure of the original heat exchanger by replacing the original single-tube heat exchanger with a self-breathing heat exchanger 7. Working in conjunction with a pump capable of real-time power conversion, the self-breathing membrane 702 of the self-breathing heat exchanger 7 is continuously squeezed and stretched under the hydraulic pressure of the wave-like spray liquid. This significantly reduces the possibility of large-scale scale buildup on the inner wall of the self-breathing heat exchanger 7 during long-term heat conversion, ensuring high heat conversion efficiency over extended periods. The product is particularly suitable for heat conversion operations involving complex fluids such as spray liquids, where scale buildup is highly likely during heat conversion. The heat exchanger assembly 1, used with the self-breathing heat exchanger 7, achieves excellent waste heat recovery from industrial exhaust gases. Even if the self-breathing heat exchanger 7 needs to be removed for cleaning, only the self-breathing membrane 702 needs to be replaced, and the heat transfer fluid re-injected; continuous cleaning of the inner wall of the self-breathing heat exchanger 7 is unnecessary, making cleaning operations very simple.

[0048] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0049] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0050] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An industrial waste gas waste heat recovery heat exchange mechanism, comprising a heat exchanger assembly (1), characterized in that: The heat exchanger assembly (1) is provided with a first connecting pipe (2), a second connecting pipe (3), a third connecting pipe (4), a fourth connecting pipe (5), a pair of tube sheets (6), and other necessary components. The first connecting pipe (2) is externally connected to a pump that can perform real-time power conversion. Multiple self-breathing heat exchange tubes (7) are inserted between the pair of tube sheets (6). The self-breathing heat exchange tube (7) includes a tube shell (701), a self-breathing membrane (702), a first threaded tube (703), and a second threaded tube (704). The tube shell (701) is inserted between the pair of tube sheets (6). The inner end of the tube sheet (6) The wall has connecting threads on both sides. The first threaded tube (703) is connected to the shell (701) through the connecting threads. The inner end wall of the first threaded tube (703) is also connected. The second threaded tube (704) is connected to the first threaded tube (703) through the connecting threads. The self-breathing membrane (702) is set inside the shell (701) and is clamped at both ends by the first threaded tube (703) and the second threaded tube (704). A certain gap is left between the self-breathing membrane (702) and the shell (701), and the gap is filled with heat-conducting liquid.

2. The industrial waste gas waste heat recovery heat exchanger according to claim 1, characterized in that: Both the first threaded tube (703) and the second threaded tube (704) have a filling screw hole (8) at the end away from the tube shell (701), and a sealing long screw (9) is connected to the filling screw hole (8) by an internal thread.

3. The industrial waste gas waste heat recovery heat exchanger according to claim 1, characterized in that: The heat-conducting fluid is made from a colored, component-stabilized liquid.

4. The industrial waste gas waste heat recovery heat exchanger according to claim 1, characterized in that: A sealing detection device (12) is provided on the left side of the self-breathing heat exchange tube (7). An air inlet pipe (13) is fixedly installed on the left end of the sealing detection device (12), and an air outlet pipe (14) is fixedly installed on the right end of the sealing detection device (12). A pressure sensor is fitted into the inner end wall of the air outlet pipe (14). After the sealing detection device (12) and the self-breathing heat exchange tube (7) are connected, the air outlet pipe (14) passes through the injection screw hole (8) and extends into the gap left between the tube shell (701) and the self-breathing membrane (702).

5. The industrial waste gas waste heat recovery heat exchanger according to claim 4, characterized in that: An airflow sensor (15) is fixedly installed at the middle of the right end of the sealing detection device (12).

6. The industrial waste gas waste heat recovery heat exchanger according to claim 1, characterized in that: The second threaded tube (704) and the first threaded tube (703) are respectively fixedly connected to an annular cutting blade (10) and an annular cutting groove (11) at one end close to each other. The annular cutting blade (10) and the annular cutting groove (11) are connected synchronously after the first threaded tube (703) and the second threaded tube (704) are connected.

7. The industrial waste gas waste heat recovery heat exchanger according to claim 1, characterized in that: The self-breathing membrane (702) is supported by a corrosion-resistant, tensile-strength material.

8. A working method for an industrial waste gas waste heat recovery heat exchange mechanism, as described in any one of claims 4-5, characterized in that: Includes the following steps: S1. Pipeline assembly: Connect the first connecting pipe (2) to the pump that can perform real-time power conversion and then complete the assembly with the spray tower. S2, Hydraulic conversion: The pump pushes the hot fluid of the spray liquid in a wave-like manner in the self-breathing heat exchange tube (7) and recovers the waste heat; S3, Surface Deformation: The wave-like spray liquid heat fluid partially squeezes and stretches the self-breathing membrane (702) of the self-breathing heat exchange tube (7), reducing the possibility of scale accumulation and reduced heat conversion efficiency during long-term heat conversion. S4. Synchronous detection: After the waste heat recovery is completed, the shell (701) and the self-breathing membrane (702) of the self-breathing heat exchange tube (7) are simultaneously detected by the sealing detection device (12).

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