Industrial cooling water circulation system complementary energy recovery device

Abstract

The utility model belongs to the technical field of energy conservation and carbon reduction in the coal chemical industry, and particularly relates to a complementary energy recovery device of an industrial cooling water circulation system, which comprises a shell, a rotating shaft, fan blades and an impeller, a plurality of groups of water inlets are arranged on the side edge of the shell, a water outlet is arranged at the bottom of the shell, a support plate is arranged on the upper portion of the shell, and a shaft sleeve is fixed on the support plate. A lower electromagnetic ring is fixed to the upper surface of the supporting plate, an upper permanent magnet ring is fixed to the rotating shaft, the axial acting force of the rotating shaft in the motion state is reduced through the permanent magnet technology, and the system operation efficiency is improved. Return water pressure of the cooling water circulation system can be recycled, the stator winding is arranged on the inner wall of the shaft sleeve, the permanent magnet is arranged on the rotating shaft, a stator winding coil and the permanent magnet jointly form a speed regulation power generation device, and the speed regulation power generation device achieves power supply through a four-quadrant variable-frequency speed regulation system.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy conservation and carbon reduction in the coal chemical industry, and particularly relates to a residual energy recovery device for an industrial cooling water circulation system. Background Art

[0002] The industrial cooling water circulation system is a circulating water system that uses water as a cooling medium. After the cooling water passes through the heat exchange equipment, the water temperature rises and then enters the cooling tower. The contact between water and air is used to dissipate the waste heat generated in the industry through evaporation. The traditional cooling tower uses a motor or a turbine to drive the fan to rotate. The dry air with low enthalpy value is pumped by the fan and enters the cooling tower from the air inlet. The high-temperature water molecules with high saturated steam partial pressure flow toward the air with low pressure, and the hot and humid water with high enthalpy value is sprinkled into the tower through the water distributor. When the water droplets come into contact with the air, direct heat transfer between the air and water is used. At the same time, there is a pressure difference between the water vapor surface and the air. Evaporation occurs under the action of pressure, taking away the latent heat of evaporation and the heat in the water, thereby achieving the purpose of cooling the cooling water.

[0003] When the industrial cooling water circulation system is in operation, the weight of the fan and the wind pressure generated when the fan rotates will cause the fan bearing to bear greater friction in both the axial and radial directions, resulting in reduced efficiency. At the same time, when designing the cooling water circulation system, in order to meet the requirements of the heat exchange effect of the heat exchange equipment and the flow rate of the circulating water in the pipeline, in general, the water supply pressure of the cooling water circulation system refers to the pressure of the cooling water before entering the heat exchange equipment after being pressurized by the pump. The design value of the water supply pressure is about 0.4-0.5Mpa; the return water pressure of the cooling water circulation system refers to the pressure of the cooling water before entering the cooling tower after passing through the heat exchange equipment. The design value of the return water pressure is about 0.15-0.25Mpa, which causes energy waste to a certain extent. At the same time, the temperature difference between winter and summer in the northern region is large, with the extreme minimum temperature of -42.4℃ and the extreme maximum temperature of 37.6℃. The operating load of the industrial cooling water circulation system is seriously affected by the ambient temperature, resulting in a serious mismatch between the actual operating parameters of the cooling water circulation system and the design values, making the energy waste problem more prominent. Utility Model Content

[0004] The purpose of the utility model is to provide a residual energy recovery device for an industrial cooling water circulation system, which can reduce the axial friction of the bearing and, when the system return water pressure is high, recycle the return water pressure energy.

[0005] The technical solution of the utility model is: a waste energy recovery device for an industrial cooling water circulation system, comprising a shell, a rotating shaft, fan blades and an impeller, the side of the shell is provided with multiple groups of water inlets, the bottom of the shell is provided with a water outlet, the upper part of the shell is provided with a support plate, a shaft sleeve is fixed on the support plate, the rotating shaft is rotatably installed in the shaft sleeve through a bearing, the lower end of the rotating shaft passes through the support plate and extends to the interior of the shell, an impeller is provided at one end of the rotating shaft located in the shell, a fan blade is provided at the top of the rotating shaft, a lower electromagnetic ring is provided on the upper surface of the support plate, an upper permanent magnetic ring is provided on the rotating shaft, the upper end of the lower electromagnetic ring and the lower end of the upper permanent magnetic ring have the same magnetic pole, the upper ring of the rotating shaft is provided with an upper ring sleeve made of magnetic isolation material, the upper ring sleeve opening faces downward, and the upper permanent magnetic ring Located in the upper ring sleeve, a lower ring sleeve made of magnetic isolation material is provided below the upper ring sleeve, the lower ring sleeve is provided on the outer diameter of the lower electromagnetic ring, and the lower ring sleeve is connected to the support plate, and there is a gap between the top of the lower ring sleeve and the bottom end of the upper ring sleeve; a stator winding is provided on the inner wall of the sleeve, and the stator winding is arranged between the fan blade and the upper ring sleeve, and a plurality of permanent magnets are provided in pairs on the rotating shaft, and the positions of the plurality of permanent magnets arranged in pairs correspond to the positions of the stator windings, and the plurality of permanent magnets and the stator winding coils together form a speed regulation power generation device, and the speed regulation power generation device formed by the plurality of permanent magnets and the stator winding has a four-quadrant frequency conversion speed regulation system, and the speed regulation of the rotating shaft is achieved by the four-quadrant frequency conversion speed regulation system, and electric energy is provided for the entire residual energy recovery device.

[0006] Furthermore, each group of water inlets are arranged relative to each other, and multiple groups of water inlets are evenly arranged on the side wall of the shell.

[0007] Furthermore, a water inlet pipe valve group is installed at each group of the water inlets, each water inlet is connected to the water outlet, an impeller is provided at the place where the multiple water inlets and water outlets are connected, and a water distributor is connected to the bottom end of the water outlet.

[0008] Furthermore, a bypass is installed at each of the water inlets, the bypass is directly connected to the water distributor, and a bypass regulating valve is provided on each of the bypasses to control the flow of water flowing through the water inlet into the water outlet.

[0009] Furthermore, the lower electromagnetic ring fixed on the upper surface of the support plate has the same magnetic pole as the upper permanent magnet fixed on the rotating shaft on the opposite side. The current flowing through the lower electromagnetic ring is adjusted by the fan speed to balance the fan's own weight and the force of the fan blade rotation, thereby reducing the equipment operation resistance and improving the system operation efficiency.

[0010] Furthermore, the stator winding on the inner wall of the sleeve and the multiple permanent magnets arranged in pairs on the corresponding rotating shaft together form a speed-regulating power generation device. When the return water pressure of the cooling water circulation system is greater than the critical pressure, the multiple permanent magnets arranged in pairs on the rotating shaft rotate with the rotating shaft, the stator winding is energized, and external power supply is realized through the four-quadrant frequency conversion speed regulation system; when the return water pressure of the cooling water circulation system is less than the critical pressure, the speed-regulating power generation device is connected to the external power supply, and the stator winding is energized through the four-quadrant frequency conversion speed regulation system. The magnetic induction principle is used to increase the force of the rotating shaft, increase the rotation speed of the rotating shaft and the fan blades, and meet the power demand of the entire waste energy recovery device; wherein, the return water pressure of the cooling water circulation system refers to the pressure of the cooling water before it enters the cooling tower after passing through the heat exchange equipment. The cooling water enters the waste energy recovery device under this pressure state. The critical pressure refers to the return water pressure state under which the rotation speed of the fan blades of the cooling water circulation system meets the production operation requirements, and the speed-regulating power generation device neither generates electricity nor requires external power supply.

[0011] Furthermore, a rotating motor is provided on the housing, an output end of the rotating motor is connected to a transmission rod, one end of the transmission rod is provided with a transmission gear, one side of the transmission gear is engaged with a rotating shaft gear, and the rotating shaft gear is sleeved on the rotating shaft.

[0012] The beneficial effects of the utility model are:

[0013] 1. The impeller is driven to rotate by the impact of water flow, and the rotating shaft drives a plurality of permanent magnets arranged in pairs thereon to rotate. The plurality of permanent magnets and the electronic winding form a speed-regulating power generation device. The speed-regulating power generation device can provide electric energy for the entire waste energy recovery device through its internal four-quadrant variable frequency speed regulation system. At the same time, the speed-regulating power generation device can also provide electric energy for external electrical equipment through the four-quadrant variable frequency speed regulation system, thereby realizing energy recovery and utilization. In the case that the actual operating parameters of the cooling water circulation system are seriously mismatched with the design values due to the influence of ambient temperature, the return water pressure of the cooling water circulation system is recovered and utilized to reduce energy waste.

[0014] 2. When the speed-regulating power generation device formed by the permanent magnet and the stator winding generates electricity, the speed-regulating power generation device supplies power to the entire waste energy recovery device, so that the lower electromagnetic ring is energized to generate magnetism. The upper end of the lower electromagnetic ring and the lower end of the upper permanent magnet ring have the same magnetic pole, resulting in a pair of equal and opposite forces between the upper permanent magnet ring and the lower electromagnetic ring. The repulsive force of the lower electromagnetic ring on the upper permanent magnet ring applies an upward force to the rotating shaft. This upward force offsets the downward force of the fan blade when it rotates and the gravity of the rotating shaft and the fan blade. At the same time, the magnetic force of the lower electromagnetic ring is further adjusted by adjusting and controlling the number of turns and current of the lower electromagnetic ring coil, so that the axial force of the bearing between the rotating shaft and the sleeve is balanced, thereby ensuring the efficient operation of the waste energy recovery device.

[0015] 3. When the return water pressure of the cooling water circulation system is lower than the critical pressure, the speed-regulating generator can be connected to an external power source, and the stator winding can be energized through the four-quadrant variable frequency speed regulation system. The magnetic induction principle is used to increase the force of the shaft rotation, thereby increasing the speed of the shaft and the fan blades, thereby avoiding the impact of insufficient return water pressure on system stability.

[0016] 4. When the return water pressure of the cooling water circulation system is lower than the critical pressure, the motor can be used to drive the shaft to rotate, thereby increasing the speed of the fan blades and impeller, realizing the speed adjustment of the shaft and fan blades, compensating for the impact of insufficient return water pressure on the system stability, and ensuring the safe, stable and long-term operation of the surplus energy recovery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 for Figure 1 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "one end", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] When the fan's rotating shaft rotates through the bearing, the bearing is subjected to greater friction in the axial direction due to the fan's own weight and the wind pressure generated when the fan rotates, resulting in reduced efficiency; at the same time, there is energy waste when the cooling water circulation system is in operation; in view of this, the inventor of this application provides an industrial cooling water circulation system waste energy recovery device, which can reduce the axial friction of the bearing, and at the same time recycle the return water pressure of the cooling water circulation system to reduce energy waste.

[0023] like Figure 1-2As shown, an industrial cooling water circulation system waste energy recovery device includes a shell 1, a rotating shaft 2, fan blades 3 and an impeller 4. The side of the shell 1 is provided with multiple groups of water inlets 5, the bottom of the shell 1 is provided with a water outlet 6, the upper part of the shell 1 is provided with a support plate 7, the support plate 7 is fixed with a shaft sleeve 8, the rotating shaft 2 is rotatably installed in the shaft sleeve 8 through a bearing, the lower end of the rotating shaft 2 passes through the support plate 7 and extends to the interior of the shell 1, the impeller 4 is provided at one end of the rotating shaft 2 located in the shell 1, the top of the rotating shaft 2 is provided with a fan blade 3, a lower electromagnetic ring 10 is fixed on the upper surface of the support plate 7, and an upper permanent magnetic ring 9 is fixed on the rotating shaft 2. The upper end of the lower electromagnetic ring 10 and the lower end of the upper permanent magnetic ring 9 have the same magnetic poles, the upper ring sleeve 11 made of magnetic isolation material is provided on the rotating shaft 2, the upper ring sleeve 11 opening is facing downward, the upper permanent magnetic ring 9 is located in the upper ring sleeve 11, and the upper A lower ring sleeve 12 made of magnetic isolation material is provided below the ring sleeve 11. The lower ring sleeve 12 is provided on the outer diameter of the lower electromagnetic ring 10, and the lower ring sleeve 12 is connected to the support plate 7. There is a gap between the top of the lower ring sleeve 12 and the bottom end of the upper ring sleeve 11; a stator winding 14 is provided on the inner wall of the shaft sleeve 8, and the stator winding 14 is provided between the fan blades 3 and the upper ring sleeve 11, and a plurality of permanent magnets 13 arranged in pairs are provided on the rotating shaft 2, and the positions of the plurality of permanent magnets 13 arranged in pairs correspond to the positions of the stator winding 14. The stator winding coil and the plurality of permanent magnets together form a speed regulation power generation device. The speed regulation power generation device formed by the plurality of permanent magnets 13 and the stator winding 14 has a four-quadrant frequency conversion speed regulation system inside, and the speed regulation of the rotating shaft is achieved by the four-quadrant frequency conversion speed regulation system, and electric energy is provided for the entire said waste energy recovery device.

[0024] Based on the above embodiment, water enters the housing 1 through the water inlet 5 and drives the impeller 4 to rotate, the impeller 4 drives the rotating shaft 2 to rotate, the rotating shaft 2 drives the fan blades 3 on its top to rotate, and the water entering the housing 1 through the water inlet 5 is discharged through the water outlet 6; the rotating shaft 2 drives the multiple permanent magnets 13 arranged in pairs thereon to rotate, so that the speed-regulating power generation device formed by the multiple permanent magnets and the stator winding generates electricity. The speed-regulating power generation device provides electrical energy to the lower electromagnetic ring 10 through the four-quadrant frequency conversion speed regulation system, so that the lower electromagnetic ring 10 is energized to generate magnetism. The upper end of the lower electromagnetic ring 10 and the lower end of the upper permanent magnet ring 9 have the same magnetic poles, both are N poles or both are S poles. According to the repulsion of like-named magnetic poles, a pair of equal-sized and opposite-direction magnetic poles are generated between the upper permanent magnet ring 9 and the lower electromagnetic ring 10. The reaction force is that the upper permanent magnet ring 9 is subjected to the repulsive force of the lower electromagnetic ring 10 in the upward direction, and its magnitude is basically equal to the sum of the downward pressure generated by the rotation of the fan blade 3, the weight of the fan blade 3, the weight of the impeller 4, the weight of the rotating shaft 2, etc. The lower electromagnetic ring 10 is subjected to the repulsive force of the upper permanent magnet ring 9 in the downward direction, and is finally supported by the support plate 7, so that there is no axial pressure difference between the inner ring and the outer ring of the bearing outside the rotating shaft 2, thereby avoiding axial friction of the bearing; the current of the lower electromagnetic ring 10 is adjusted by the rotation speed of the rotating shaft 2 and the fan blade 3, and the magnetic force of the lower electromagnetic ring 10 is further adjusted by adjusting and controlling the number of turns and current of the coil of the lower electromagnetic ring 10, so that the axial force of the bearing between the rotating shaft 2 and the sleeve 8 is balanced, thereby ensuring the efficient operation of the residual energy recovery device.

[0025] In this embodiment, if Figure 1 As shown, each group of water inlets 5 are arranged opposite to each other, and multiple groups of water inlets 5 are evenly arranged on the side wall of the housing 1.

[0026] Among them, each group of water inlets 5 is installed with a water inlet pipe valve group, each water inlet 5 is connected to the water outlet 6, an impeller 4 is provided at the place where multiple water inlets 5 are connected to the water outlet 6, and the bottom end of the water outlet 6 is connected to a water distributor.

[0027] Based on the above embodiment, a group of water inlet pipe valves in the water inlet 5 are opened at the same time to ensure that the water flows into the outer casing 1 evenly and axially symmetrically, and to ensure that both radial sides of the impeller 4 are in contact with the water flow at the same time to improve the stability of the operation of the rotating shaft 2; the water entering the outer casing 1 through the water inlet 5 enters the water distributor through the water outlet 6.

[0028] In this embodiment, a bypass is installed at each water inlet 5, the bypass is directly connected to the water distributor, and a bypass regulating valve is provided on each bypass to control the flow of water flowing through the water inlet 5 into the water outlet 6.

[0029] Based on the above embodiment, when the water pressure is too high, the bypass regulating valve is opened to allow a portion of the water to directly enter the water distributor through the bypass at the water inlet 5, so as to avoid excessive impact force on the impeller 4 caused by excessive water pressure, thereby causing the shaft 2 and the fan blade 3 to rotate too fast.

[0030] In this embodiment, the stator winding 14 on the inner wall of the sleeve 8 and the multiple permanent magnets 13 arranged in pairs on the corresponding rotating shaft 2 together form a speed-regulating power generation device. When the return water pressure of the cooling water circulation system is greater than the critical pressure, the multiple permanent magnets 13 arranged in pairs on the rotating shaft 2 rotate with the rotating shaft 2, the stator winding 14 is energized, and external power is supplied through the four-quadrant frequency conversion speed regulation system; when the return water pressure of the cooling water circulation system is less than the critical pressure, the speed-regulating power generation device is connected to an external power supply, and the stator winding 14 is energized through the four-quadrant frequency conversion speed regulation system. The magnetic induction principle is used to increase the force of the rotating shaft 2, thereby increasing the rotation speed of the rotating shaft 2 and the fan blades 3, thereby meeting the power demand of the entire waste energy recovery device; wherein, the return water pressure of the cooling water circulation system refers to the pressure of the cooling water before it enters the cooling tower after passing through the heat exchange equipment. The cooling water enters the waste energy recovery device under this pressure state, and the critical pressure refers to the return water pressure state under which the rotation speed of the fan blades 3 of the cooling water circulation system meets the production operation requirements, and the speed-regulating power generation device neither generates electricity nor requires external power supply.

[0031] Based on the above embodiment, when the return water pressure of the cooling water circulation system is lower than the critical pressure, the speed regulating generator is connected to an external power supply, the stator winding is energized through the four-quadrant variable frequency speed regulation system, and the force of the rotating shaft is increased by the principle of magnetic induction, thereby increasing the rotation speed of the rotating shaft 2 and the fan blades 3, thereby avoiding the impact of insufficient return water pressure on the system stability.

[0032] In this embodiment, a rotating motor 15 is provided on the housing 1, and the output end of the rotating motor 15 is connected to a transmission rod 16. One end of the transmission rod 16 is provided with a transmission gear 17. One side of the transmission gear 17 is engaged with a rotating shaft gear 18, and the rotating shaft gear 18 is sleeved on the rotating shaft 2.

[0033] Based on the above embodiment, when the return water pressure of the cooling water circulation system is lower than the critical pressure, the external power supply provides electric energy to the rotating motor 15, and the rotating motor 15 drives the transmission rod 16, and the transmission gear 17 at the end of the transmission rod 16 rotates. The transmission gear 17 drives the rotating shaft 2 to rotate through the rotating shaft gear 18 engaged with it, and the rotating shaft 2 drives the fan blades 3 and the impeller 4 to rotate, thereby accelerating the rotation speed of the rotating shaft 2, the fan blades 3 and the impeller 4, thereby compensating for the impact of insufficient return water pressure on the stability of the system.

[0034] The working principle of the utility model is as follows: open the water inlet pipe valve group in the water inlet 5, so that water enters the shell 1 through the water inlet 5 and impacts the impeller 4. After being impacted by the water flow, the impeller 4 starts to rotate, thereby driving the rotating shaft 2 to rotate. When the rotating shaft 2 rotates, it drives the permanent magnet 13 and the fan blade 3 thereon to rotate, so that the speed-regulating power generation device formed by the multiple permanent magnets 13 and the stator winding 14 generates electricity. The speed-regulating power generation device can provide electric energy to external electrical equipment through its internal four-quadrant variable frequency speed regulation system, realizing energy recovery and utilization. At the same time, the four-quadrant variable frequency speed regulation system provides electric energy to the lower electromagnetic ring 10, so that the lower electromagnetic ring 10 acquires magnetism. Since the upper end of the lower electromagnetic ring 10 has the same magnetism as the lower end of the upper permanent magnet ring 9, according to the repulsion of the same magnetic poles, the upper permanent magnet ring 9 is subjected to the upward repulsive force of the lower electromagnetic ring 10. The repulsive force of the lower electromagnetic ring 10 on the upper permanent magnet ring 9 applies an upward force to the rotating shaft 2, offsetting the downward force of the fan blade 3 when the fan blade 3 rotates and the gravity of the rotating shaft 2 and the fan blade 3, thereby reducing the axial friction force on the bearing between the rotating shaft 2 and the sleeve 8;

[0035] The water entering the housing 1 through the water inlet 5 impacts the impeller 4 and flows into the water distributor through the water outlet 6 at the bottom of the housing 1.

[0036] When the return water pressure of the cooling water circulation system is lower than the critical pressure, the speed regulating generator is connected to an external power source, and the stator winding 14 is energized through the four-quadrant variable frequency speed regulation system. The magnetic induction principle is used to increase the force of the rotating shaft 2, thereby increasing the speed of the rotating shaft 2 and the fan blades 3, thereby avoiding the impact of insufficient return water pressure on the system stability.

[0037] When the return water pressure of the cooling water circulation system is lower than the critical pressure, the transmission rod 16 can be driven to rotate by rotating the motor 15. The transmission rod 16 drives the rotating shaft 2 to rotate through the transmission gear 17 and the rotating shaft gear 18. By rotating the motor 15, the rotation speed of the rotating shaft 2 is increased, and the rotation speed of the rotating shaft 2 and the fan blades 3 is adjusted, thereby compensating for the influence of insufficient return water pressure on the system stability and ensuring the safe, stable and long-term operation of the residual energy recovery device.

[0038] When the water pressure is too high, the bypass regulating valve is opened to allow part of the water to directly enter the water distributor through the bypass at the water inlet 5, so as to avoid excessive impact force on the impeller 4 caused by excessive water pressure.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A waste energy recovery device for an industrial cooling water circulation system, comprising a housing, a rotating shaft, a fan blade and an impeller, wherein the side of the housing is provided with multiple water inlets, the bottom of the housing is provided with a water outlet, the upper portion of the housing is provided with a support plate, a shaft sleeve is fixed on the support plate, the rotating shaft is rotatably mounted in the shaft sleeve through a bearing, the lower end of the rotating shaft passes through the support plate and extends to the interior of the housing, an impeller is provided at one end of the rotating shaft located in the housing, and a fan blade is provided at the top of the rotating shaft, characterized in that: The upper surface of the support plate is provided with a lower electromagnetic ring, and the rotating shaft is provided with an upper permanent magnetic ring, the upper end of the lower electromagnetic ring and the lower end of the upper permanent magnetic ring have the same magnetic pole, the upper ring ring of the rotating shaft is provided with an upper ring sleeve made of magnetic isolation material, the upper ring sleeve opening is facing downward, the upper permanent magnetic ring is located in the upper ring sleeve, and a lower ring sleeve made of magnetic isolation material is provided below the upper ring sleeve, the lower ring sleeve is provided on the outer diameter of the lower electromagnetic ring, and the lower ring sleeve is connected to the support plate, and there is a gap between the top end of the lower ring sleeve and the bottom end of the upper ring sleeve; the shaft A stator winding is provided on the inner wall of the sleeve, and the stator winding is arranged between the fan blades and the upper ring sleeve. A plurality of permanent magnets are provided in pairs on the rotating shaft, and the positions of the plurality of permanent magnets arranged in pairs correspond to the positions of the stator windings. The plurality of permanent magnets and the stator winding coils together form a speed-regulating power generation device. The speed-regulating power generation device formed by the plurality of permanent magnets and the stator winding has a four-quadrant variable frequency speed regulation system. The speed of the rotating shaft is achieved through the four-quadrant variable frequency speed regulation system, and electric energy is provided for the entire waste energy recovery device.

2. The residual energy recovery device for an industrial cooling water circulation system according to claim 1, characterized in that: Each group of water inlets is arranged relative to each other, and multiple groups of water inlets are evenly arranged on the side wall of the shell.

3. The residual energy recovery device for an industrial cooling water circulation system according to claim 2, characterized in that: Each group of water inlets is equipped with a water inlet pipe valve group, each water inlet is connected to the water outlet, and an impeller is provided at the place where the water inlets and the water outlets are connected, and the bottom end of the water outlet is connected to a water distributor.

4. The residual energy recovery device for an industrial cooling water circulation system according to claim 3, characterized in that: A bypass is installed at each water inlet, which is directly connected to the water distributor. A bypass regulating valve is provided on each bypass to control the flow of water flowing through the water inlet into the water outlet.

5. The residual energy recovery device for an industrial cooling water circulation system according to claim 4, characterized in that: The stator winding on the inner wall of the sleeve and the multiple permanent magnets arranged in pairs on the corresponding rotating shaft together form a speed-regulating power generation device. When the return water pressure of the cooling water circulation system is greater than the critical pressure, the multiple permanent magnets arranged in pairs on the rotating shaft rotate with the rotating shaft, the stator winding is energized, and external power supply is realized through the four-quadrant frequency conversion speed regulation system; when the return water pressure of the cooling water circulation system is less than the critical pressure, the speed-regulating power generation device is connected to the external power supply, and the stator winding is energized through the four-quadrant frequency conversion speed regulation system. The magnetic induction principle is used to increase the force of the rotating shaft, increase the rotation speed of the rotating shaft and the fan blades, and meet the power demand of the entire waste energy recovery device; wherein, the return water pressure of the cooling water circulation system refers to the pressure of the cooling water before it enters the cooling tower after passing through the heat exchange equipment. The cooling water enters the waste energy recovery device under this pressure state. The critical pressure refers to the return water pressure state under which the rotation speed of the fan blades of the cooling water circulation system meets the production operation requirements, and the speed-regulating power generation device neither generates electricity nor requires external power supply.

6. The residual energy recovery device for an industrial cooling water circulation system according to claim 5, characterized in that: The housing is provided with a rotating motor, the output end of the rotating motor is connected to a transmission rod, one end of the transmission rod is provided with a transmission gear, one side of the transmission gear is engaged with a rotating shaft gear, and the rotating shaft gear is sleeved on the rotating shaft.

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