Energy-saving heat exchange device for compressed air system

Abstract

This application relates to an energy-saving heat exchange device for a compressed air system, belonging to the field of energy-saving heat exchange technology. It includes a heat exchange sleeve fitted onto the outer wall of the air compressor output pipe. The heat exchange sleeve includes an outer sleeve, end caps at both ends of the outer sleeve, and two spiral water-cooled heat exchange tubes. Both spiral water-cooled heat exchange tubes are disposed inside the outer sleeve, with opposite spiral directions. The flow direction of the cooling water inside the spiral water-cooled heat exchange tubes is opposite to the air flow direction inside the air compressor output pipe. This application has the effect of recovering waste heat generated during the compressed air process, improving energy saving efficiency and economic benefits.

Description

Technical Field

[0001] This application relates to the field of energy-saving heat exchange technology, and in particular to an energy-saving heat exchange device for compressed air systems. Background Technology

[0002] Compressed air systems are widely used energy supply systems in the industrial field. They provide power to various pneumatic equipment and processes by compressing and storing air. They mainly consist of air compressors, dryers, filters, air tanks, piping systems, and control systems, and are widely used in manufacturing, electronics, automobile manufacturing, and other fields.

[0003] During the operation of a compressed air system, the air compressor draws in ambient air and compresses it to a set pressure through mechanical means, such as screw rotation and piston reciprocation. The temperature of the compressed air rises, and this heat usually accounts for 70%-95% of the compressor's total power consumption. However, existing technologies do not effectively utilize this waste heat, which does not meet the production goals of energy conservation and emission reduction, resulting in low economic efficiency. Therefore, improvements are needed. Utility Model Content

[0004] In order to recover the waste heat generated during the compressed air process and improve energy saving and economic benefits, this application provides an energy-saving heat exchange device for compressed air systems.

[0005] The energy-saving heat exchange device for a compressed air system provided in this application adopts the following technical solution:

[0006] An energy-saving heat exchange device for a compressed air system includes a heat exchange sleeve fitted on the outer wall of the output pipe of an air compressor. The heat exchange sleeve includes an outer sleeve, end caps at both ends of the outer sleeve, and two spiral water-cooled heat exchange tubes. Both spiral water-cooled heat exchange tubes are disposed inside the outer sleeve, and the two spiral water-cooled heat exchange tubes are arranged in opposite directions. The flow direction of the cooling water in the spiral water-cooled heat exchange tubes is opposite to the flow direction of the air in the output pipe of the air compressor.

[0007] By adopting the above technical solution, the two spiral water-cooled heat exchange tubes can absorb the heat in the compressed air through heat exchange, so as to use it for heating, industrial water, etc., thereby realizing the recovery and utilization of waste heat and achieving the effect of energy saving and emission reduction. In addition, since the flow direction of the cooling water in the spiral water-cooled heat exchange tubes is opposite to the flow direction of the air in the air compressor output tube, the heat exchange efficiency can be further increased, and the waste heat recovery and utilization rate can be further improved.

[0008] Preferably, the heat exchange tube sleeve further includes a heat-conducting film disposed inside the spiral water-cooled heat exchange tube, the heat-conducting film being located between the spiral water-cooled heat exchange tube and the output tube, and the heat-conducting film being made of copper material.

[0009] By adopting the above technical solution, the heat exchange efficiency between compressed air and cooling water can be improved by setting a copper heat-conducting diaphragm, thereby facilitating the effective recovery of more waste heat.

[0010] Preferably, the inner wall of the end cap is provided with a first insertion groove for inserting the end of the outer tube sleeve and a second insertion groove for inserting the end of the heat-conducting film.

[0011] By adopting the above technical solution, setting the first insertion slot and the second insertion slot can effectively improve the stability of the outer tube sleeve and the end of the heat-conducting film, reduce the probability of them moving around, and thus improve the stability of the heat exchange tube sleeve during use.

[0012] Preferably, an elastic buffer pad is provided between the first insertion slot and the second insertion slot.

[0013] By adopting the above technical solution, the elastic buffer pads can protect both ends of the spiral water-cooled heat exchange tube to prevent the spiral water-cooled heat exchange tube from breaking when it is vibrated externally, which would affect the heat exchange efficiency and waste heat recovery efficiency.

[0014] Preferably, both the outer sleeve and the end wall of the heat-conducting film are provided with magnetic attracting elements, which are magnetically attracted to the bottom wall of the first insertion slot and the bottom wall of the second insertion slot.

[0015] By adopting the above technical solution, the magnetic attraction component can improve the connection stability between the outer tube sleeve, the thermally conductive diaphragm and the end cap, thereby ensuring the safety and stability of the heat exchange tube sleeve during use.

[0016] Preferably, the outer wall of the outer tube is fitted with a heat-insulating film.

[0017] By adopting the above technical solution, the heat insulation film can effectively prevent heat loss, thereby improving the efficiency of waste heat recovery.

[0018] Preferably, both ends of the heat insulation film are provided with bonding slopes, and the bonding slopes on both sides abut against each other.

[0019] By adopting the above technical solution, setting the fitting slope can improve the tightness of the heat insulation film after it is fitted onto the outer tube, thereby more effectively preventing the loss of residual heat and improving the efficiency of residual heat recovery.

[0020] Preferably, the outer sleeve includes two symmetrical splicing parts.

[0021] By adopting the above technical solution, setting the outer tube sleeve into two symmetrical splicing parts facilitates the installation or disassembly of the spiral water-cooled heat exchange tube inside the outer tube sleeve. The operation process is convenient and quick. With the cooperation of the first insertion slot, the installation can be completed quickly without bolts or other fasteners, thereby improving the maintenance and upkeep efficiency of the heat exchange tube sleeve.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] Two spiral water-cooled heat exchange tubes absorb heat from compressed air through heat exchange, which can then be used for heating, industrial water supply, etc., thereby achieving waste heat recovery and utilization, and realizing energy conservation and emission reduction. In addition, since the flow direction of cooling water in the spiral water-cooled heat exchange tubes is opposite to the flow direction of air in the air compressor output pipe, the heat exchange efficiency can be further increased, thus further improving the waste heat recovery and utilization rate. The copper heat-conducting diaphragm can improve the heat exchange efficiency between compressed air and cooling water, thereby facilitating the effective recovery of more waste heat. The first and second insertion slots can effectively improve the stability of the outer tube sleeve and the ends of the heat-conducting diaphragm, reducing the probability of cross-flow, and thus improving the stability of the heat exchange tube sleeve during use. The elastic buffer pads can protect both ends of the spiral water-cooled heat exchange tubes to prevent them from breaking when subjected to external vibration, which would affect the heat exchange efficiency and waste heat recovery efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an energy-saving heat exchange device for a compressed air system according to an embodiment of this application.

[0025] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0026] Figure 3 This is a cross-sectional view of the outer sleeve and the heat insulation film according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Output pipe; 2. Heat exchange tube sleeve; 21. Outer tube sleeve; 211. Splicing part; 22. End cap; 221. First insertion slot; 222. Second insertion slot; 223. Elastic buffer pad; 23. Spiral water-cooled heat exchange tube; 24. Thermal conductive film; 3. Magnetic suction component; 4. Heat insulation film; 41. Adhesive bevel. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0029] This application discloses an energy-saving heat exchange device for a compressed air system. (Refer to...) Figure 1 , Figure 2 and Figure 3 , Figure 2 and Figure 3The system includes a heat exchange tube sleeve 2 fitted onto the outer wall of the air compressor output pipe 1. The heat exchange tube sleeve 2 includes an outer tube sleeve 21, end caps 22 disposed at both ends of the outer tube sleeve 21, two spiral water-cooled heat exchange tubes 23, and a heat-conducting diaphragm 24. The output pipe 1 passes through the two end caps 22. The outer tube sleeve 21 includes two symmetrically arranged splicing parts 211. The inner wall of the end caps 22 is formed with an annular first insertion groove 221 for insertion at both ends of the outer tube sleeve 21, thereby improving the connection stability of the outer tube sleeve 21. The heat-conducting diaphragm 24 is straight. The sleeve is located outside the output tube 1. In this embodiment, the heat-conducting diaphragm 24 is made of copper to improve heat exchange efficiency. The inner ring of the first insertion groove 221 is also formed with a second insertion groove 222 for the end of the heat-conducting diaphragm 24. The outer tube sleeve 21 and the end wall of the heat-conducting diaphragm 24 are both glued with magnetic attracting elements 3. The magnetic attracting elements 3 are made of magnets. The magnetic attracting elements 3 are magnetically attracted to the inner walls of the first insertion groove 221 and the second insertion groove 222, thereby improving the connection stability between the outer tube sleeve 21 and the heat-conducting diaphragm 24.

[0030] Reference Figure 1 , Figure 2 and Figure 3 Two spiral water-cooled heat exchange tubes 23 are disposed between the outer tube sleeve 21 and the heat-conducting diaphragm 24. The two spiral water-cooled heat exchange tubes 23 are arranged in opposite directions to each other. In this embodiment, the cooling water flow direction in the spiral water-cooled heat exchange tubes 23 is opposite to the compressed air flow direction in the output pipe 1 to improve heat exchange efficiency. The outer tube sleeve 21 needs to be provided with holes for the outlet and inlet of the spiral water-cooled heat exchange tubes 23 to extend out. The two spiral water-cooled heat exchange tubes 23 can absorb the heat in the compressed air through heat exchange for use in heating and industrial applications. Water, etc., thereby realizing the recovery and utilization of waste heat and achieving the effect of energy conservation and emission reduction; an elastic buffer pad 223 is also provided between the first insertion groove 221 and the second insertion groove 222. The elastic buffer pad 223 is made of rubber material and is located at both ends of the spiral water-cooled heat exchange tube 23. The elastic buffer pad 223 is ring-shaped and is connected to the inner wall of the end cap by adhesive to achieve the effect of shock absorption and buffering, preventing the spiral water-cooled heat exchange tube 23 from breaking under external vibration, thereby ensuring the safety and stability of the heat exchange tube sleeve 2 of this application.

[0031] Reference Figure 1 , Figure 2 and Figure 3 The outer wall of the outer tube sleeve 21 is wrapped with a heat insulation film 4. The heat insulation film 4 is attached to the surface of the outer tube sleeve 22. Both ends of the heat insulation film 4 are provided with a bonding bevel 41 to improve the sealing performance after the heat insulation film 4 is wrapped, reduce the loss of residual heat, and improve the efficiency of residual heat recovery.

[0032] The implementation principle of the energy-saving heat exchange device for a compressed air system in this application embodiment is as follows: Two spiral water-cooled heat exchange tubes 23 can absorb heat from the compressed air through heat exchange, so as to use it for heating, industrial water, etc., thereby realizing the recovery and utilization of waste heat and achieving the effect of energy saving and emission reduction. In addition, since the flow direction of cooling water in the spiral water-cooled heat exchange tubes 23 is opposite to the flow direction of air in the air compressor output pipe 1, the heat exchange efficiency can be further increased, and the waste heat recovery and utilization rate can be further improved. At the same time, the internal heat-conducting film 24 can effectively improve the heat exchange efficiency, and the heat insulation film 4 can effectively reduce the loss of waste heat, thereby achieving the effect of energy saving and emission reduction.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy-saving heat exchange device for a compressed air system, characterized in that: The device includes a heat exchange tube sleeve fitted onto the outer wall of the air compressor output pipe. The heat exchange tube sleeve includes an outer tube sleeve, end caps at both ends of the outer tube sleeve, and two spiral water-cooled heat exchange tubes. Both spiral water-cooled heat exchange tubes are located inside the outer tube sleeve and are arranged with opposite spiral directions. The flow direction of the cooling water in the spiral water-cooled heat exchange tubes is opposite to the flow direction of the air in the air compressor output pipe.

2. An energy saving heat exchanger for compressed air systems according to claim 1, characterized in that: The heat exchange tube sleeve also includes a heat-conducting film disposed inside the spiral water-cooled heat exchange tube. The heat-conducting film is located between the spiral water-cooled heat exchange tube and the output tube, and the heat-conducting film is made of copper.

3. An energy saving heat exchanger for compressed air systems according to claim 2, characterized in that: The inner wall of the end cap is provided with a first insertion groove for inserting the end of the outer tube sleeve and a second insertion groove for inserting the end of the heat-conducting film.

4. An energy saving heat exchanger for compressed air systems according to claim 3, characterized in that: An elastic buffer pad is provided between the first and second insertion slots.

5. An energy saving heat exchanger for compressed air systems according to claim 3, characterized in that: Both the outer sleeve and the end wall of the heat-conducting film are provided with magnetic attracting elements, which are magnetically attracted to the bottom wall of the first insertion slot and the bottom wall of the second insertion slot.

6. An energy saving heat exchanger for compressed air systems according to claim 1, characterized in that: The outer wall of the outer tube is fitted with a heat-insulating film.

7. An energy saving heat exchanger for compressed air systems according to claim 6, characterized in that: Both ends of the heat insulation film are provided with bonding slopes, and the bonding slopes on both sides abut against each other.

8. An energy saving heat exchanger for compressed air systems according to claim 1, characterized in that: The outer sleeve includes two symmetrical splicing parts.

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