Multi-point heat recovery and integrated network distribution system for industrial production line

Abstract

The invention relates to the technical field of industrial heat recovery, and discloses a multipoint heat recovery and integrated network distribution system for an industrial production line. The multi-point heat recovery and integrated network distribution system for the industrial production line comprises an exhaust waste heat recovery system, an air compression waste heat recovery system, a sewage heat recovery system, a water source heat pump reheating system, a water temperature heat storage system and a constant-pressure water delivery pump system. According to the multi-point heat storage system, a previous single-point heat recovery system or a direct discharge waste phenomenon is replaced, a previous single-point heat recovery system with poor quality is replaced, and multi-point heat recovery, multi-point use and integration of two heat storage systems with different water temperatures are really realized; through reasonable system design and control strategies, graded storage and efficient utilization of heat energy are achieved, low-temperature hot water is mainly supplied to workshop tool cleaning and domestic hot water, high-temperature hot water is supplied to workshop process hot water, and the heat recovery effect is improved through a heat pump system.

Description

Technical Field

[0001] The present invention belongs to the technical field of industrial heat recovery, and in particular to a multi-point heat recovery and integrated network distribution system for an industrial production line. Background Art

[0002] The process waste heat exhaust, steam condensate, high-temperature wastewater, and waste heat from air compressor lubricating oil generated in the original industrial production are all discharged directly, causing environmental thermal pollution. Or some heat recovery systems use single-point heat recovery and single-point use, which is very easy to cause heat generation and heat use imbalance. At the same time, the heat recovered by the single-point heat recovery system is of poor quality; therefore, in view of the current situation, it is necessary to improve it. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a multi-point heat recovery and integrated network distribution system for industrial production lines, which effectively solves the problem of direct discharge of process waste heat, steam condensate, high-temperature wastewater, and waste heat of air compressor lubricating oil generated in the original industrial production, which causes environmental thermal pollution. Or some heat recovery systems use single-point heat recovery and single-point use, which is very easy to cause heat generation and heat use imbalance, and the quality of heat recovered by the single-point heat recovery system is poor.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-point heat recovery and integrated network distribution system for industrial production lines, including an exhaust waste heat recovery system, an air compressor waste heat recovery system, a sewage heat recovery system, a water source heat pump reheating system, a water temperature heat storage system and a constant pressure water supply pump system.

[0005] Exhaust waste heat recovery system: includes a high-temperature exhaust waste heat recovery system and a low-temperature exhaust waste heat recovery system, the high-temperature exhaust waste heat recovery system includes a high-temperature exhaust waste heat recovery device, the water inlet of the high-temperature exhaust waste heat recovery device is connected to a high-temperature exhaust waste heat recovery water pump, a first solenoid valve is installed between the high-temperature exhaust waste heat recovery device and the high-temperature exhaust waste heat recovery water pump, the low-temperature exhaust waste heat recovery system includes a low-temperature exhaust waste heat recovery device, the water inlet of the low-temperature exhaust waste heat recovery device is connected to a low-temperature exhaust waste heat recovery water pump, a second solenoid valve is installed between the low-temperature exhaust waste heat recovery device and the low-temperature exhaust waste heat recovery water pump.

[0006] Air compressor waste heat recovery system: includes an air compressor waste heat recovery water pump, two sets of water outlets of the air compressor waste heat recovery water pump are respectively connected to the air compressor waste heat recovery device and the cooling water pump, the water outlet of the cooling water pump is connected to the cooling tower, and two sets of water inlets of the water inlet pipe of the air compressor waste heat recovery device are respectively connected to the fifth solenoid valve and the fourth solenoid valve, and the fifth solenoid valve is connected to the water outlet of the cooling tower.

[0007] Sewage heat recovery system: includes a high-temperature steam condensate heat recovery device and a high-temperature wastewater heat recovery device, the water outlets of the high-temperature steam condensate heat recovery device and the high-temperature wastewater heat recovery device are connected to a heat recovery oil-water separator, the water outlet of the heat recovery oil-water separator is connected to a sewage pump, the water outlet of the sewage pump is connected to a sewage heat exchanger, the water outlet of the sewage heat exchanger is connected to a sewage treatment tank, a sewage drainage electric valve is installed between the sewage heat exchanger and the sewage treatment tank, and the water inlet of the sewage heat exchanger is connected to a sewage heat recovery pump.

[0008] The water source heat pump reheating system comprises an evaporator and a condenser. The water inlet of the evaporator is connected to a low-temperature water inlet pump, and the water inlet of the condenser is connected to a high-temperature water inlet pump.

[0009] The water temperature heat storage system comprises a low-temperature water tank and a high-temperature water tank, a second calorimeter is installed on the outside of the low-temperature water tank, a first calorimeter is installed on the outside of the high-temperature water tank, a water outlet of the low-temperature water tank is connected to a water inlet of a low-temperature water inlet pump, a water return port of the low-temperature water tank is connected to a water outlet of an evaporator, a water outlet of the high-temperature water tank is connected to a water inlet of a high-temperature water inlet pump, a water outlet of the condenser is connected to a water return port of the high-temperature water tank, a third solenoid valve is installed on the water outlet of the first calorimeter, and a water outlet of the low-temperature water tank is connected to a water outlet of the evaporator. A second solenoid valve is installed at the outlet, the third solenoid valve is connected to the second solenoid valve, the third solenoid valve is connected to the water inlet of the high-temperature exhaust waste heat recovery device, the outlet pipe of the low-temperature water tank is connected to the sewage heat recovery water pump, the low-temperature exhaust waste heat recovery water pump, the high-temperature exhaust waste heat recovery water pump and the air compressor waste heat recovery water pump, the water outlet of the sewage heat exchanger is connected to the water outlet of the fourth solenoid valve, and the connection between the water outlet of the sewage heat exchanger and the water outlet of the fourth solenoid valve is connected to the low-temperature exhaust waste heat recovery device and the second solenoid valve.

[0010] Constant pressure water pump system: includes a low temperature water pump and a high temperature water pump, the water inlet of the low temperature water tank is connected with the water outlet of the low temperature water pump, and the water inlet of the high temperature water tank is connected with the water outlet of the high temperature water pump.

[0011] Preferably, the low-temperature exhaust waste heat recovery device and the high-temperature exhaust waste heat recovery device are both copper tube aluminum fin water-gas heat exchangers, and the casings of the low-temperature exhaust waste heat recovery device and the high-temperature exhaust waste heat recovery device are both made of polyurethane glass magnesium single-sided 304 stainless steel color steel plate.

[0012] Preferably, the sewage pump, sewage heat recovery pump, low-temperature water pump, high-temperature water pump, low-temperature water inlet pump, high-temperature water inlet pump, cooling water pump, air compressor waste heat recovery pump, high-temperature exhaust waste heat recovery pump and low-temperature exhaust waste heat recovery pump are all hot water centrifugal water pumps.

[0013] Preferably, a first temperature sensor is installed on the high-temperature exhaust air waste heat recovery device, and a third temperature sensor is installed on the low-temperature exhaust air waste heat recovery device.

[0014] Preferably, the tank bodies of the low-temperature water tank and the high-temperature water tank are made of sanitary-grade 304 stainless steel.

[0015] Preferably, an eighth temperature sensor is installed on the low-temperature water tank, and a ninth temperature sensor is installed on the high-temperature water tank.

[0016] Preferably, a fifth temperature sensor is installed on the heat recovery oil separator.

[0017] Preferably, a second pressure sensor is installed on the low-temperature water pump, and a first pressure sensor is installed on the high-temperature water pump.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts integrated multi-point heat recovery, and different pipe networks and separation control systems are used for collection and distribution. At the same time, the system integrates two heat storage systems with different water temperatures, and can provide two different water temperatures for use;

[0019] 2. The present invention replaces the previous single-point heat recovery system or direct discharge waste phenomenon, replaces the previous single-point heat recovery system with poor quality, and truly realizes multi-point heat recovery and multi-point use, integrating two heat storage systems with different water temperatures: it aims to combine low-temperature heat storage with high-temperature heat storage technology, and through reasonable system design and control strategies, realize the hierarchical storage and efficient utilization of thermal energy. Low-temperature hot water is mainly supplied to the workshop for tool cleaning and domestic hot water, and high-temperature hot water is supplied to the workshop for process hot water. The heat pump system is used to connect the heat energy of the two temperature systems, greatly improving the heat recovery effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0021] In the attached picture:

[0022] Figure 1 A block diagram of a multi-point heat recovery and integrated network distribution system for an industrial production line of the present invention;

[0023] Figure 2 It is a block diagram of the high-temperature exhaust waste heat recovery system of the present invention;

[0024] Figure 3 It is a block diagram of the low-temperature exhaust waste heat recovery system of the present invention;

[0025] Figure 4 It is a block diagram of the air pressure waste heat recovery system of the present invention;

[0026] Figure 5 is a block diagram of the sewage heat recovery system of the present invention;

[0027] Figure 6 It is a block diagram of the water source heat pump reheating system in the present invention.

[0028] In the figure: 1. High-temperature steam condensate heat recovery device; 11. High-temperature wastewater heat recovery device; 12. Heat recovery oil separator; 13. Sewage pump; 14. Sewage heat exchanger; 15. Sewage treatment tank; 151. Sewage drainage electric valve; 16. Sewage heat recovery pump; 17. Low-temperature water pump; 18. High-temperature water pump; 19. High-temperature water tank; 22. Low-temperature water tank; 25. Low-temperature water inlet pump; 26. Evaporator; 27. Condenser; 28. High-temperature water inlet pump; 29. ​​First Calorimeter; 3. Second calorimeter; 31. Third solenoid valve; 32. Second solenoid valve; 33. Fifth solenoid valve; 34. Fourth solenoid valve; 35. Cooling tower; 36. Cooling water pump; 37. Air compressor waste heat recovery device; 38. Air compressor waste heat recovery water pump; 39. Low-temperature exhaust waste heat recovery device; 4. Low-temperature exhaust waste heat recovery water pump; 41. High-temperature exhaust waste heat recovery device; 42. High-temperature exhaust waste heat recovery water pump; 43. First solenoid valve; 44. Second solenoid valve. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] like Figure 1-Figure 6 As shown, the present invention provides a technical solution: a multi-point heat recovery and integrated network distribution system for an industrial production line, including an exhaust waste heat recovery system, an air compressor waste heat recovery system, a sewage heat recovery system, a water source heat pump reheating system, a water temperature heat storage system and a constant pressure water supply pump system.

[0031] Exhaust waste heat recovery system: including a high-temperature exhaust waste heat recovery system and a low-temperature exhaust waste heat recovery system. The high-temperature exhaust waste heat recovery system includes a high-temperature exhaust waste heat recovery device 41. The water inlet of the high-temperature exhaust waste heat recovery device 41 is connected to a high-temperature exhaust waste heat recovery water pump 42. A first solenoid valve 43 is installed between the high-temperature exhaust waste heat recovery device 41 and the high-temperature exhaust waste heat recovery water pump 42. The high-temperature exhaust waste heat recovery device 41 is used to transfer the heat energy in the exhaust air to the heat recovery circulating water, and the high-temperature exhaust waste heat recovery water pump 42 provides power for the water to circulate in the high-temperature exhaust waste heat recovery device 41 and the high-temperature water tank 19. The low-temperature exhaust The waste heat recovery system includes a low-temperature exhaust waste heat recovery device 39, and the water inlet of the low-temperature exhaust waste heat recovery device 39 is connected to a low-temperature exhaust waste heat recovery water pump 4. The low-temperature exhaust waste heat recovery device 39 is used to transfer the heat energy in the exhaust air to the heat recovery circulating water. The low-temperature exhaust waste heat recovery water pump 4 provides power for the water to circulate in the low-temperature exhaust waste heat recovery device 39 and the low-temperature water tank 22. The water circulates through the low-temperature exhaust waste heat recovery device 39 and continuously heats up. The temperature reaches the high-temperature hot water temperature and enters the high-temperature water tank 19. A second solenoid valve 44 is installed between the low-temperature exhaust waste heat recovery device 39 and the low-temperature exhaust waste heat recovery water pump 4.

[0032] Air compressor waste heat recovery system: includes an air compressor waste heat recovery water pump 38, the two sets of water outlets of the air compressor waste heat recovery water pump 38 are respectively connected to the air compressor waste heat recovery device 37 and the cooling water pump 36, the water outlet of the cooling water pump 36 is connected to the cooling tower 35, when the heat storage capacity of the water temperature heat storage system reaches the maximum, the cooling tower 35 continues to dissipate heat to ensure normal heat dissipation of the air compressor, the two sets of water inlets of the water inlet pipe of the air compressor waste heat recovery device 37 are respectively connected to the fifth solenoid valve 33 and the fourth solenoid valve 34, and the fifth solenoid valve 33 is connected to the water outlet of the cooling tower 35.

[0033] Sewage heat recovery system: includes a high-temperature steam condensate heat recovery device 1 and a high-temperature wastewater heat recovery device 11. The water outlets of the high-temperature steam condensate heat recovery device 1 and the high-temperature wastewater heat recovery device 11 are connected to a heat recovery oil-trap tank 12. The water outlet of the heat recovery oil-trap tank 12 is connected to a sewage pump 13. The high-temperature steam condensate and high-temperature wastewater generated in the production process are collected through the heat recovery oil-trap tank 12. The sewage pump 13 realizes high-efficiency transportation technology, which is used to transport the hot wastewater to be collected to the sewage heat exchanger 14 for heat energy recovery. The water outlet of the sewage pump 13 is connected to the sewage heat exchanger 14. The sewage heat exchanger 14 is used to transfer the heat energy of the collected hot wastewater to domestic water. The water outlet of the sewage heat exchanger 14 is connected to a sewage treatment tank 15. A sewage drainage electric valve 151 is installed between the sewage heat exchanger 14 and the sewage treatment tank 15. The water inlet of the sewage heat exchanger 14 is connected to a sewage heat recovery pump 16.

[0034] Water source heat pump reheating system: includes an evaporator 26 and a condenser 27. The water inlet of the evaporator 26 is connected to a low-temperature water inlet pump 25, which provides power for the water to circulate between the evaporator 26 and the low-temperature water tank 22. The water circulates through the evaporator 26 for heat exchange. The water inlet of the condenser 27 is connected to a high-temperature water inlet pump 28, which provides power for the water to circulate between the condenser 27 and the high-temperature water tank 19. The water circulates through the condenser 27 and continuously heats up.

[0035] Water temperature heat storage system: including a low-temperature water tank 22 and a high-temperature water tank 19. The low-temperature water tank 22 stores low-temperature hot water. The temperature of the low-temperature hot water is 40°C-55°C, which can ensure the hot water required for heat recovery and improve heat exchange efficiency and flexibility. The high-temperature water tank 19 stores high-temperature hot water. The temperature of the high-temperature hot water is 70°C-85°C, which can ensure the high-temperature hot water required for process production and improve production efficiency and flexibility. A second calorimeter 3 is installed on the outside of the low-temperature water tank 22, and a first calorimeter 29 is installed on the outside of the high-temperature water tank 19. The water outlet of the low-temperature water tank 22 is connected to the water inlet of the low-temperature water inlet pump 25, the water return port of the low-temperature water tank 22 is connected to the water outlet of the evaporator 26, the water outlet of the high-temperature water tank 19 is connected to the water inlet of the high-temperature water inlet pump 28, and the condenser The water outlet of 27 is connected with the return water outlet of the high-temperature water tank 19, the water outlet of the first calorimeter 29 is installed with a third solenoid valve 31, the water outlet of the low-temperature water tank 22 is installed with a second solenoid valve 32, the third solenoid valve 31 is connected with the second solenoid valve 32, the third solenoid valve 31 is connected with the water inlet of the high-temperature exhaust waste heat recovery device 41, the water outlet pipe of the low-temperature water tank 22 is connected with the sewage heat recovery water pump 16, the low-temperature exhaust waste heat recovery water pump 4, the high-temperature exhaust waste heat recovery water pump 42 and the air compressor waste heat recovery water pump 38, the water outlet of the sewage heat exchanger 14 is connected with the water outlet of the fourth solenoid valve 34, and the connection point between the water outlet of the sewage heat exchanger 14 and the water outlet of the fourth solenoid valve 34 is connected with the low-temperature exhaust waste heat recovery device 39 and the second solenoid valve 32.

[0036] Constant pressure water pump system: includes a low-temperature water pump 17 and a high-temperature water pump 18. The water inlet of the low-temperature water tank 22 is connected to the water outlet of the low-temperature water pump 17. The low-temperature water pump 17 is used to deliver low-temperature hot water to various water-using locations. The water inlet of the high-temperature water tank 19 is connected to the water outlet of the high-temperature water pump 18. The high-temperature water pump 18 is used to deliver low-temperature hot water to various water-using locations.

[0037] Among them, the low-temperature exhaust waste heat recovery device 39 and the high-temperature exhaust waste heat recovery device 41 are both copper tube aluminum fin water-air heat exchangers, and the boxes of the low-temperature exhaust waste heat recovery device 39 and the high-temperature exhaust waste heat recovery device 41 are both made of polyurethane glass magnesium single-sided 304 stainless steel color steel plate, sewage pump 13, sewage heat recovery pump 16, low-temperature water pump 17, high-temperature water pump 18, low-temperature water inlet pump 25, high-temperature water inlet pump 28, cooling water pump 36, air compressor waste heat recovery pump 38, high-temperature exhaust waste heat recovery pump 42 and low-temperature exhaust waste heat recovery pump 4 They are all hot water centrifugal water pumps. A first temperature sensor is installed on the high-temperature exhaust waste heat recovery device 41, a third temperature sensor is installed on the low-temperature exhaust waste heat recovery device 39, the tank body material of the low-temperature water tank 22 and the high-temperature water tank 19 is sanitary grade 304 stainless steel, an eighth temperature sensor is installed on the low-temperature water tank 22, a ninth temperature sensor is installed on the high-temperature water tank 19, a fifth temperature sensor is installed on the heat recovery oil separator 12, a second pressure sensor is installed on the low-temperature water pump 17, and a first pressure sensor is installed on the high-temperature water pump 18.

[0038] Working principle of multi-point heat recovery and integrated network distribution system for industrial production lines:

[0039] When the water source is being transported, when the workshop stops production, the low-temperature water pump 17 and the high-temperature water pump 18 are not started, and when the workshop is in production, when the first pressure sensor detects that the water pressure is lower than 2.5kg / cm 2 , high temperature water pump 18 starts, frequency conversion controls water pressure at 3.0~3.5kg / cm 2 When the second pressure sensor detects that the water pressure is lower than 2.5kg / cm 2 , low temperature water pump 17 starts, and the frequency conversion controls the water pressure to 3.0~3.5kg / cm 2 between.

[0040] In industrial production, when high-temperature hot exhaust air is sent to the exhaust waste heat recovery system through the ventilation duct, when the first temperature sensor detects that the air temperature is higher than 50°C and the water level of the low-temperature water tank 22 is higher than 0.3m, the high-temperature exhaust waste heat recovery water pump 42 starts and heat recovery is turned on: the high-temperature exhaust air and water pass through the high-temperature exhaust waste heat recovery device 41 to effectively recover the heat energy in the high-temperature exhaust air. When the first temperature sensor detects that the air temperature is lower than 75°C, the high-temperature exhaust waste heat recovery water pump 42 stops. When the third temperature sensor detects that the air temperature is higher than 72°C, the second solenoid valve Open 44, the third solenoid valve 31 is closed, and hot water enters the high-temperature water tank 19. When the low-temperature hot exhaust air is sent to the exhaust waste heat recovery system through the ventilation duct, when the third temperature sensor detects that the air temperature is higher than 50°C and the water level of the low-temperature water tank 22 is higher than 0.3m, the low-temperature exhaust waste heat recovery water pump 4 is started to start heat recovery, the first solenoid valve 43 is opened, and the low-temperature exhaust air and water pass through the low-temperature exhaust waste heat recovery device to effectively recover the heat energy in the low-temperature exhaust air. When the third temperature sensor detects that the air temperature is lower than 45°C, the low-temperature exhaust waste heat recovery water pump 4 stops.

[0041] When the air compressor is started, the air compressor waste heat recovery water pump 38 is started, the first solenoid valve 43 and the fourth solenoid valve 34 are opened to recover the heat energy of the air compressor. When the eighth temperature sensor detects that the water temperature of the low-temperature water tank 22 is higher than 45°C, the air compressor waste heat recovery water pump 38 stops running, the fifth solenoid valve is opened, and the air compressor uses the cooling tower 35 to dissipate heat to ensure the safe operation of the air compressor.

[0042] When the water level of the heat recovery grease trap 12 reaches the high water level, the fifth temperature sensor is higher than 50°C, and the water level of the low-temperature water tank 22 is higher than 0.3m, the sewage heat recovery water pump 16 starts, the first solenoid valve opens, and heat recovery is turned on to collect the steam condensate and high-temperature hot wastewater generated in industrial production into the unified heat recovery grease trap 12. After the oil and water are separated, the water in the lower layer enters the sewage heat exchanger 14 for heat exchange process, effectively recovering the heat energy in the wastewater. After completing the heat energy recovery, the sewage is discharged to the sewage treatment tank 15 through the sewage drainage electric valve 151, and finally discharged safely.

[0043] When the ninth temperature sensor detects that the water temperature of the high-temperature water tank 19 is lower than 70°C, the high-temperature water inlet pump 28 is turned on, the water of the high-temperature water tank 19 enters the condenser 27 to increase the temperature to higher than 75°C, and then re-enters the high-temperature water tank 19. The water of the low-temperature water tank 22 enters the evaporator 26 through the low-temperature water inlet pump 25 for exchange, and then re-enters the low-temperature water tank 22 after the temperature is reduced. When the temperature sensor detects that the water temperature of the high-temperature water tank 22 is higher than 85°C, the high-temperature water inlet pump 28 is turned off, which effectively prevents the shortage of high-grade heat source and utilizes the low-grade heat source to improve the quality of the heat source.

[0044] When the eighth temperature sensor detects that the water temperature of the low-temperature water tank 22 is higher than 55°C, the exhaust waste heat recovery system stops running, the sewage heat recovery system is controlled to have an outlet water temperature higher than 70°C, the second solenoid valve opens and the third solenoid valve opens, the first solenoid valve closes, and hot water enters the high-temperature water tank 19.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Multi-point heat recovery and integrated network distribution system for industrial production lines, characterized by: It includes exhaust waste heat recovery system, air compressor waste heat recovery system, sewage heat recovery system, water source heat pump reheating system, water temperature heat storage system and constant pressure water supply pump system. The exhaust waste heat recovery system comprises a high-temperature exhaust waste heat recovery system and a low-temperature exhaust waste heat recovery system. The high-temperature exhaust waste heat recovery system comprises a high-temperature exhaust waste heat recovery device (41). The water inlet of the high-temperature exhaust waste heat recovery device (41) is connected to a high-temperature exhaust waste heat recovery water pump (42). A first solenoid valve (43) is installed between the high-temperature exhaust waste heat recovery device (41) and the high-temperature exhaust waste heat recovery water pump (42). The low-temperature exhaust waste heat recovery system comprises a low-temperature exhaust waste heat recovery device (39). The water inlet of the low-temperature exhaust waste heat recovery device (39) is connected to a low-temperature exhaust waste heat recovery water pump (4). A second solenoid valve (44) is installed between the low-temperature exhaust waste heat recovery device (39) and the low-temperature exhaust waste heat recovery water pump (4). An air compressor waste heat recovery system comprises an air compressor waste heat recovery water pump (38), wherein two groups of water outlets of the air compressor waste heat recovery water pump (38) are respectively connected to an air compressor waste heat recovery device (37) and a cooling water pump (36), wherein the water outlet of the cooling water pump (36) is connected to a cooling tower (35), and two groups of water inlets of the water inlet pipe of the air compressor waste heat recovery device (37) are respectively connected to a fifth solenoid valve (33) and a fourth solenoid valve (34), wherein the fifth solenoid valve (33) is connected to the water outlet of the cooling tower (35). A sewage heat recovery system: comprising a high-temperature steam condensate heat recovery device (1) and a high-temperature wastewater heat recovery device (11); the water outlets of the high-temperature steam condensate heat recovery device (1) and the high-temperature wastewater heat recovery device (11) are connected to a heat recovery oil separator (12); the water outlet of the heat recovery oil separator (12) is connected to a sewage pump (13); the water outlet of the sewage pump (13) is connected to a sewage heat exchanger (14); the water outlet of the sewage heat exchanger (14) is connected to a sewage treatment tank (15); a sewage discharge electric valve (151) is installed between the sewage heat exchanger (14) and the sewage treatment tank (15); and the water inlet of the sewage heat exchanger (14) is connected to a sewage heat recovery pump (16). The water source heat pump reheating system comprises an evaporator (26) and a condenser (27), wherein the water inlet of the evaporator (26) is connected to a low-temperature water inlet pump (25), and the water inlet of the condenser (27) is connected to a high-temperature water inlet pump (28). A water temperature heat storage system comprises a low-temperature water tank (22) and a high-temperature water tank (19), wherein a second calorimeter (3) is installed on the outer side of the low-temperature water tank (22), and a first calorimeter (29) is installed on the outer side of the high-temperature water tank (19), the water outlet of the low-temperature water tank (22) is connected to the water inlet of a low-temperature water inlet pump (25), the water return port of the low-temperature water tank (22) is connected to the water outlet of an evaporator (26), the water outlet of the high-temperature water tank (19) is connected to the water inlet of a high-temperature water inlet pump (28), the water outlet of the condenser (27) is connected to the water return port of the high-temperature water tank (19), the water outlet of the first calorimeter (29) is installed with a third solenoid valve (31), and the water outlet of the low-temperature water tank (22) is connected to the water outlet of the high-temperature water tank (19). A second solenoid valve (32) is installed at the water outlet, the third solenoid valve (31) is connected to the second solenoid valve (32), the third solenoid valve (31) is connected to the water inlet of the high-temperature exhaust waste heat recovery device (41), the water outlet pipe of the low-temperature water tank (22) is connected to the sewage heat recovery water pump (16), the low-temperature exhaust waste heat recovery water pump (4), the high-temperature exhaust waste heat recovery water pump (42) and the air compressor waste heat recovery water pump (38), the water outlet of the sewage heat exchanger (14) is connected to the water outlet of the fourth solenoid valve (34), and the connection point between the water outlet of the sewage heat exchanger (14) and the water outlet of the fourth solenoid valve (34) is connected to the low-temperature exhaust waste heat recovery device (39) and the second solenoid valve (32). A constant pressure water pump system comprises a low temperature water pump (17) and a high temperature water pump (18), wherein the water inlet of the low temperature water tank (22) is connected to the water outlet of the low temperature water pump (17), and the water inlet of the high temperature water tank (19) is connected to the water outlet of the high temperature water pump (18).

2. The industrial production line multi-point heat recovery and integrated network distribution system according to claim 1 is characterized by: The low-temperature exhaust waste heat recovery device (39) and the high-temperature exhaust waste heat recovery device (41) are both copper tube aluminum fin water-air heat exchangers, and the casings of the low-temperature exhaust waste heat recovery device (39) and the high-temperature exhaust waste heat recovery device (41) are both made of polyurethane glass magnesium single-sided 304 stainless steel color steel plate.

3. The industrial production line multi-point heat recovery and integrated network distribution system according to claim 1 is characterized by: The sewage pump (13), sewage heat recovery pump (16), low-temperature water pump (17), high-temperature water pump (18), low-temperature inlet water pump (25), high-temperature inlet water pump (28), cooling water pump (36), air compressor waste heat recovery pump (38), high-temperature exhaust waste heat recovery pump (42) and low-temperature exhaust waste heat recovery pump (4) are all hot water centrifugal water pumps.

4. The industrial production line multi-point heat recovery and integrated network distribution system according to claim 1 is characterized by: The high-temperature exhaust air waste heat recovery device (41) is installed with a first temperature sensor, and the low-temperature exhaust air waste heat recovery device (39) is installed with a third temperature sensor.

5. The industrial production line multi-point heat recovery and integrated network distribution system according to claim 1 is characterized by: The tank bodies of the low-temperature water tank (22) and the high-temperature water tank (19) are made of sanitary-grade 304 stainless steel.

6. The industrial production line multi-point heat recovery and integrated network distribution system according to claim 1 is characterized by: An eighth temperature sensor is installed on the low-temperature water tank (22), and a ninth temperature sensor is installed on the high-temperature water tank (19).

7. The industrial production line multi-point heat recovery and integrated network distribution system according to claim 1 is characterized by: A fifth temperature sensor is installed on the heat recovery grease trap (12).

8. The industrial production line multi-point heat recovery and integrated network distribution system according to claim 1 is characterized by: A second pressure sensor is installed on the low-temperature water pump (17), and a first pressure sensor is installed on the high-temperature water pump (18).

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