Industrial residual pressure heat pump with high stability

Abstract

The invention belongs to the technical field of excess pressure heat pump units, particularly relates to an industrial excess pressure heat pump with high stability, and aims to solve the problems of poor pressure buffering capacity, low compression efficiency, easiness in blockage of a heat exchange module and low system integration degree in the background technology. The bottom of the pressure buffer unit is fixedly connected with a drainage tube, and the outer wall of one end of the drainage tube is fixedly connected with a multi-stage compression module. And a pressurizing pipe is arranged at the top of the multi-stage compression module, a double-set heat exchange module is arranged on the outer wall of one end of the pressurizing pipe, a liquid inlet pipe is arranged on one side of the double-set heat exchange module, and a backflushing assembly is arranged in the double-set heat exchange module. By means of the innovative design, efficient and stable operation of the industrial residual pressure heat pump is achieved, and the industrial residual pressure heat pump has the advantages of saving energy, reducing consumption, being convenient to maintain and high in adaptability and has remarkable industrial application value.

Description

Technical Field

[0001] The present invention relates to the technical field of residual pressure heat pump units, and particularly to an industrial residual pressure heat pump with high stability. Background Art

[0002] An industrial residual pressure heat pump is an energy-efficient device that utilizes the residual pressure energy (such as high-temperature and high-pressure gases, steam, or liquids) generated during industrial production processes for heat energy recovery and conversion. Its core principle is to convert low-grade residual pressure heat energy into high-grade utilizable heat energy through heat pump technology for process heating, heating, or other industrial uses. This technology can significantly reduce energy consumption and carbon emissions and has important application value in high-energy-consuming industries such as chemical engineering, metallurgy, and electric power. Traditional residual pressure heat pumps usually rely on single-stage compression and simple heat exchange structures. Although they can achieve basic functions, they are easily restricted by factors such as pressure fluctuations, medium impurities, and low heat exchange efficiency under complex working conditions, resulting in insufficient system stability, a decrease in the energy efficiency ratio, and an increase in maintenance costs.

[0003] The existing technologies have the following deficiencies: Poor pressure buffering capacity: Traditional buffer tanks are mostly statically designed and are difficult to effectively eliminate the pulsation and impurities of the residual pressure medium, resulting in severe pressure fluctuations at the compressor inlet, affecting the stability of multistage compression, and even causing equipment vibration and wear.

[0004] Low compression efficiency: A single-stage compressor is difficult to adapt to wide-range pressure changes. When the compression ratio is insufficient, it is easy to cause energy waste. If a multistage compressor lacks independent control, it is prone to inter-stage pressure imbalance, reducing the overall efficiency.

[0005] The heat exchange module is prone to clogging: The traditional heat exchanger has a single structure. During long-term operation, impurity deposition will cause fouling of the heat exchange coils, reducing the heat transfer efficiency and being difficult to clean, requiring frequent shutdown for maintenance.

[0006] Low system integration: The connection between components is loose, lacking modular design, resulting in a large floor area, complex installation, and being difficult to meet the flexible configuration requirements of different industrial scenarios. Summary of the Invention

[0007] Aiming at the deficiencies of the existing technologies, the present invention provides an industrial residual pressure heat pump with high stability, overcoming the deficiencies of the existing technologies and effectively solving the problems of poor pressure buffering capacity, low compression efficiency, easy clogging of the heat exchange module, and low system integration.

[0008] To achieve the above objectives, the present invention adopts the following technical solutions: An industrial residual pressure heat pump with high stability, including a base, a pressure buffering unit is arranged on the top of the base, and a drainage pipe is fixedly connected to the bottom of the pressure buffering unit. One outer wall of the drainage pipe is fixedly connected with a multi-stage compression module. And a pressurizing pipe is arranged on the top of the multi-stage compression module. One outer wall of the pressurizing pipe is provided with a double-set heat exchange module, and a liquid inlet pipe is arranged on one side of the double-set heat exchange module. A backwashing component is arranged inside the double-set heat exchange module.

[0009] The multi-stage compression module includes a first-stage compressor, a second-stage compressor and a third-stage compressor. Among them, the first-stage compressor, the second-stage compressor and the third-stage compressor are sequentially connected in series from bottom to top, and the pump casings between the first-stage compressor and the second-stage compressor and between the second-stage compressor and the third-stage compressor are fixedly connected by flanges. Independent variable-frequency motors are equipped on the outer walls of one ends of the first-stage compressor, the second-stage compressor and the third-stage compressor.

[0010] Through the above scheme, the first-stage compressor, the second-stage compressor and the third-stage compressor are configured in series, and each stage is equipped with an independent variable-frequency motor, which can dynamically adjust the speed according to the real-time pressure, avoid inter-stage pressure imbalance, realize efficient gradient compression, and improve the compression ratio and energy utilization rate. The flange connection ensures the inter-stage sealing and structural rigidity, reduces vibration transmission, and extends the service life of the equipment.

[0011] Preferably, for an industrial residual pressure heat pump with high stability, the pressure buffering unit includes a cyclone separation type buffer tank, a residual pressure inlet pipe and a tank hopper. Among them, the cyclone separation type buffer tank is arranged on the top of the base, the residual pressure inlet pipe is welded to the top of the outer wall of one side of the cyclone separation type buffer tank, the tank hopper is arranged at the bottom of the cyclone separation type buffer tank, and the other outer wall of the drainage pipe is fixedly connected to the bottom outer wall of the tank hopper by a flange.

[0012] Through the above scheme, when the residual pressure medium passes through the cyclone separation type buffer tank, efficient separation is achieved under the action of centrifugal force, and the purified medium is smoothly transported to the compression module through the drainage pipe, greatly reducing the inlet pressure fluctuation and ensuring the stable operation of the system.

[0013] Preferably, the double-set heat exchange module includes a heat exchange tank, an air inlet, a heat exchange coil, an air outlet, a liquid inlet and a liquid outlet. Among them, the heat exchange tank is arranged on one side of the multi-stage compression module, the air inlet is arranged at one end of the outer wall of one side of the heat exchange tank, the air outlet is arranged at one end of the outer wall of the other side of the heat exchange tank, the heat exchange coil is installed between the air inlet and the air outlet, the liquid inlet is arranged at the other end of the outer wall of one side of the heat exchange tank, and the liquid outlet is arranged at the other end of the outer wall of the other side of the heat exchange tank.

[0014] Through the above scheme, the double-set heat exchange tank adopts a symmetrical layout, and the countercurrent heat exchange between the residual pressure medium and the working medium is realized through the heat exchange coil, maximizing the utilization rate of the temperature difference.

[0015] Preferably, the recoil assembly includes a sealing sleeve and a pulse recoil tube. Among them, the sealing sleeve is fixedly connected to the outer wall of one end of the heat exchange tank through a flange, the pulse recoil tube is inserted into the inner wall of the sealing sleeve, and one end of the pulse recoil tube is arranged inside the heat exchange tank.

[0016] Through the above solution, the recoil assembly periodically injects high-pressure fluid through the pulse recoil tube to scour the deposits on the inner wall of the heat exchange coil. Combined with the quick disassembly and assembly design of the sealing sleeve, online cleaning without shutting down the machine is achieved, significantly reducing the maintenance cost.

[0017] Preferably, a support frame is fixedly connected to the outer wall of the top of the base through screws, and the swirl separation type buffer tank is welded to the inner wall of the support frame.

[0018] Preferably, a support plate is welded to the outer wall of the top of the base, and both heat exchange tanks are installed on the outer wall of the support plate.

[0019] Through the above solution, the support frame and the support plate fix the buffer tank, the compression module, and the heat exchange module to the base, forming a compact integrated structure and reducing the floor area.

[0020] Preferably, an inlet pipe is fixedly connected to the outer wall of one end of the air inlet through a flange, and an outlet pipe is fixedly connected to the outer wall of one end of the air inlet through a flange.

[0021] Preferably, a liquid inlet pipe is fixedly connected to the outer wall of one end of the liquid inlet through a flange, and a liquid outlet pipe is fixedly connected to the outer wall of one end of the liquid outlet through a flange.

[0022] Preferably, solenoid valves and pressure gauges are installed on the outer walls of the inlet pipe and the liquid inlet pipe.

[0023] Through the above solution, external pipelines such as the inlet pipe and the liquid inlet pipe are equipped with solenoid valves and pressure gauges, realizing remote precise control and real-time monitoring, and improving the automation level of the system.

[0024] The beneficial effects of the present invention are as follows: Through innovative structural design, the present invention significantly improves the stability and energy efficiency of the industrial surplus pressure heat pump. The specific advantages are as follows: 1. Frequency conversion collaborative control of the multi-stage compression module: The first-stage compressor, the second-stage compressor, and the third-stage compressor are connected in series, and each stage is equipped with an independent variable-frequency motor, which can dynamically adjust the speed according to the real-time pressure, avoid inter-stage pressure imbalance, achieve efficient gradient compression, and improve the compression ratio and energy utilization rate. Flange connection ensures inter-stage sealing and structural rigidity, reduces vibration transmission, and extends the service life of the equipment.

[0025] 2. Optimized Design of Cyclone Separation Buffer Tank: When the residual pressure medium passes through the cyclone separation buffer tank, efficient separation is achieved under the action of centrifugal force. The purified medium is smoothly transported to the compression module through the drainage pipe, significantly reducing the inlet pressure fluctuation and ensuring the stable operation of the system.

[0026] 3. Synergistic Effect of Double-Set Heat Exchange Module and Backflush Assembly: The double-set heat exchange tanks adopt a symmetrical layout, and countercurrent heat exchange between the residual pressure medium and the working medium is achieved through the heat exchange coils, maximizing the utilization rate of the temperature difference. The backflush assembly periodically injects high-pressure fluid through the pulse backflush pipe to scour the sediment on the inner wall of the heat exchange coils. Combined with the quick disassembly and assembly design of the sealing sleeve, online cleaning without shutting down the machine is realized, significantly reducing the maintenance cost.

[0027] 4. Modular Integration and Optimization of Support Structure: The support frame and support plate fix the buffer tank, compression module, and heat exchange module to the base, forming a compact integrated structure, reducing the floor area. The external pipelines such as the inlet gas pipe and inlet liquid pipe are all equipped with solenoid valves and pressure gauges to achieve remote precise control and real-time monitoring, improving the automation level of the system. Brief Description of the Drawings

[0028] Figure 1 is a three-dimensional schematic diagram of the overall structure of an industrial residual pressure heat pump with high stability proposed by the present invention Figure 1 ; Figure 2 is a three-dimensional schematic diagram of the overall structure of an industrial residual pressure heat pump with high stability proposed by the present invention Figure 2 ; Figure 3 is a front view of the overall structure of an industrial residual pressure heat pump with high stability proposed by the present invention; Figure 4 is a top view of the overall structure of an industrial residual pressure heat pump with high stability proposed by the present invention; Figure 5 is a schematic diagram of the pressure buffer unit of an industrial residual pressure heat pump with high stability proposed by the present invention; Figure 6 is a schematic diagram of the multi-stage compression module of an industrial residual pressure heat pump with high stability proposed by the present invention; Figure 7 is a schematic diagram of the double-set heat exchange module of an industrial residual pressure heat pump with high stability proposed by the present invention Figure 1 ; Figure 8 is a schematic diagram of the double-set heat exchange module of an industrial residual pressure heat pump with high stability proposed by the present invention Figure 2 ; Figure 9 is a schematic diagram of the connection structure of the heat exchange tank of an industrial residual pressure heat pump with high stability proposed by the present invention; Figure 10Schematic diagram of the internal structure of a heat exchange tank of an industrial residual pressure heat pump with high stability proposed by the present invention.

[0029] In the figure: 1. Base; 2. Pressure buffer unit; 21. Cyclone separation type buffer tank; 22. Residual pressure inlet pipe; 23. Tank hopper; 3. Drainage pipe; 4. Multistage compression module; 41. First-stage compressor; 42. Second-stage compressor; 43. Third-stage compressor; 5. Pressurization pipe; 6. Double-set heat exchange module; 61. Heat exchange tank; 62. Air inlet; 63. Heat exchange coil; 64. Air outlet; 65. Liquid inlet; 66. Liquid outlet; 7. Liquid inlet pipe; 8. Backflush assembly; 81. Sealing sleeve; 82. Pulse backflush pipe; 9. Support frame; 10. Support plate; 11. Air inlet pipe; 12. Air outlet pipe; 13. Liquid inlet pipe; 14. Liquid outlet pipe; 15. Solenoid valve; 16. Pressure gauge. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0031] Refer to Figures 1 - 4 、 Figure 9 , an industrial residual pressure heat pump with high stability, including a base 1, a pressure buffer unit 2 is arranged on the top of the base 1, and a drainage pipe 3 is fixedly connected to the bottom of the pressure buffer unit 2. One outer wall of the drainage pipe 3 is fixedly connected with a multistage compression module 4. And a pressurization pipe 5 is arranged on the top of the multistage compression module 4. One outer wall of the pressurization pipe 5 is provided with a double-set heat exchange module 6, and a liquid inlet pipe 7 is arranged on one side of the double-set heat exchange module 6. A backflush assembly 8 is arranged inside the double-set heat exchange module 6.

[0032] Refer to Figure 6 , an industrial residual pressure heat pump with high stability, the multistage compression module 4 includes a first-stage compressor 41, a second-stage compressor 42 and a third-stage compressor 43. Among them, the first-stage compressor 41, the second-stage compressor 42 and the third-stage compressor 43 are sequentially connected in series from bottom to top, and the pump casings between the first-stage compressor 41 and the second-stage compressor 42 and between the second-stage compressor 42 and the third-stage compressor 43 are fixedly connected by flanges. One outer wall of each of the first-stage compressor 41, the second-stage compressor 42 and the third-stage compressor 43 is equipped with an independent variable-frequency motor.

[0033] The first-stage compressor 41, the second-stage compressor 42, and the third-stage compressor 43 are connected in series. Each stage is equipped with an independent variable-frequency motor, which can dynamically adjust the speed according to the real-time pressure, avoid inter-stage pressure imbalance, achieve efficient gradient compression, and improve the compression ratio and energy utilization rate. The flange connection ensures the inter-stage sealing performance and structural rigidity, reduces vibration transmission, and prolongs the service life of the equipment.

[0034] Reference Figure 5 , an industrial surplus pressure heat pump with high stability. The pressure buffer unit 2 includes a cyclone separation buffer tank 21, a surplus pressure inlet pipe 22 and a tank hopper 23. Among them, the cyclone separation buffer tank 21 is arranged on the top of the base 1, the surplus pressure inlet pipe 22 is welded to the top of the outer wall on one side of the cyclone separation buffer tank 21, the tank hopper 23 is arranged at the bottom of the cyclone separation buffer tank 21, and the outer wall of the other end of the drainage pipe 3 is fixedly connected to the bottom outer wall of the tank hopper 23 through a flange.

[0035] When the surplus pressure medium passes through the cyclone separation buffer tank 21, efficient separation is achieved under the action of centrifugal force, and the purified medium is smoothly transported to the multi-stage compression module 4 through the drainage pipe 3, greatly reducing the inlet pressure fluctuation and ensuring the stable operation of the system.

[0036] Reference Figure 9 , the double heat exchange module 6 includes a heat exchange tank 61, an air inlet 62, a heat exchange coil 63, an air outlet 64, a liquid inlet 65 and a liquid outlet 66. Among them, the heat exchange tank 61 is arranged on one side of the multi-stage compression module 4, the air inlet 62 is arranged at one end of the outer wall on one side of the heat exchange tank 61, the air outlet 64 is arranged at one end of the outer wall on the other side of the heat exchange tank 61, the heat exchange coil 63 is installed between the air inlet 62 and the air outlet 64, the liquid inlet 65 is arranged at the other end of the outer wall on one side of the heat exchange tank 61, and the liquid outlet 66 is arranged at the other end of the outer wall on the other side of the heat exchange tank 61.

[0037] The double heat exchange tanks 61 adopt a symmetrical layout, and the countercurrent heat exchange between the surplus pressure medium and the working medium is realized through the heat exchange coil 63, maximizing the utilization rate of the temperature difference.

[0038] Reference Figure 10 , the backwashing assembly 8 includes a sealing sleeve 81 and a pulse backwashing pipe 82. Among them, the sealing sleeve 81 is fixedly connected to the outer wall at one end of the heat exchange tank 61 through a flange, the pulse backwashing pipe 82 is inserted into the inner wall of the sealing sleeve 81, and one end of the pulse backwashing pipe 82 is arranged inside the heat exchange tank 61.

[0039] The backwashing assembly 8 periodically injects high-pressure fluid through the pulse backwashing pipe 82 to scour the sediment on the inner wall of the heat exchange coil 63. Combined with the quick disassembly and assembly design of the sealing sleeve 81, online cleaning without stopping the machine is realized, significantly reducing the maintenance cost.

[0040] Reference Figure 1 , a support frame 9 is fixedly connected to the outer wall of the top of the base 1 through screws, and the cyclone separation buffer tank 21 is welded to the inner wall of the support frame 9.

[0041] Reference Figure 2 , a support plate 10 is welded to the outer wall of the top of the base 1, and both heat exchange tanks 61 are installed on the outer wall of the support plate 10.

[0042] The support frame 9 and the support plate 10 fix the cyclone separation type buffer tank 21, the multi-stage compression module 4, and the heat exchange module 6 to the base, forming a compact integrated structure and reducing the floor area.

[0043] Refer to Figure 8 , one end outer wall of the air inlet 62 is fixedly connected to an air inlet pipe 11 through a flange, and one end outer wall of the air inlet 62 is fixedly connected to an air outlet pipe 12 through a flange.

[0044] Refer to Figures 7 - 8 , one end outer wall of the liquid inlet 65 is fixedly connected to a liquid inlet pipe 13 through a flange, and one end outer wall of the liquid outlet 66 is fixedly connected to a liquid outlet pipe 14 through a flange.

[0045] Refer to Figure 7 , electromagnetic valves 15 and pressure gauges 16 are installed on the outer walls of the air inlet pipe 11 and the liquid inlet pipe 13.

[0046] External pipelines such as the air inlet pipe 11 and the liquid inlet pipe 13 are all equipped with electromagnetic valves 15 and pressure gauges 16 to achieve remote precise control and real-time monitoring, and improve the automation level of the system.

[0047] Example 1 (Overall Structure): As Figures 1 - 4 , Figure 9 shown, a pressure buffer unit 2, a multi-stage compression module 4, and a double-set heat exchange module 6 are sequentially installed on the top of the base 1. The residual pressure medium enters the cyclone separation type buffer tank 21 through the residual pressure inlet pipe 22, and after being separated and purified, it flows into the drainage pipe 3 through the tank hopper 23 and enters the multi-stage compression module 4 for step-by-step pressurization. The pressurized medium is transported to the double-set heat exchange module 6 through the pressurization pipe 5, and heat exchange is completed with the working medium in the heat exchange coil 63, and finally the heat energy is output through the liquid outlet pipe 14. The backflush assembly 8 periodically cleans the heat exchange coil 63 to ensure long-term efficient operation.

[0048] Example 2 (Multi-stage Compression Module 4): As Figure 6 shown, the first-stage compressor 41, the second-stage compressor 42, and the third-stage compressor 43 are connected in series through flanges, and each stage of the compressor is driven by an independent variable-frequency motor. The variable-frequency controller adjusts the rotational speed of each stage in real time according to the feedback of the pressure sensor to ensure the optimal compression ratio. Shock-absorbing gaskets are installed at the flange joints to inhibit vibration transmission.

[0049] Example 3 (Pressure Buffer Unit 2): As Figure 5 shown, a residual pressure inlet pipe 22 is welded to the top of the cyclone separation type buffer tank 21, the medium tangentially enters the tank body to form a cyclone, impurities settle along the tank wall to the tank hopper 23 under the action of centrifugal force, and the purified gas is stably output through the drainage pipe 3. The bottom flange of the tank hopper 23 is connected to the drainage pipe 3 to facilitate the regular discharge of impurities.

[0050] Example 4 (Double Heat Exchange Module): As Figure 9 shown, two heat exchange tanks 61 are symmetrically installed on the support plate 10. The heat exchange coil 63 is made of spiral copper pipe. The working fluid enters from the liquid inlet 65 and exchanges heat countercurrently with the high-pressure medium flowing in through the gas inlet 62. The gas outlet 64 and the liquid outlet 66 are respectively connected to the subsequent process pipelines to achieve heat energy output.

[0051] Example 5 (Backflush Component): As Figure 10 shown, the pulse backflush pipe 82 is inserted into the heat exchange tank 61 through the sealing sleeve 81. The high-pressure pulse fluid is triggered by an external control system at regular intervals to impact the inner wall of the heat exchange coil 63 and peel off the deposits. The sealing sleeve 81 adopts a quick-release flange design for easy maintenance and replacement.

[0052] Details of Other Examples: The support frame 9 is fixed to the base 1 by screws to ensure the stability of the cyclone separation type buffer tank 21; The solenoid valves 15 of the air inlet pipe 11 and the liquid inlet pipe 13 are controlled by a PLC to automatically adjust the flow according to the data of the pressure gauge 16; All flange joints adopt graphite wound gaskets to ensure the sealing performance under high-temperature and high-pressure conditions.

[0053] Working Principle: Residual Pressure Input and Buffer Purification: Industrial residual pressure medium (such as blast furnace gas in a steel mill) tangentially enters the cyclone separation type buffer tank 21 through the residual pressure inlet pipe 22. The medium forms a high-speed swirl in the tank. After separating impurities by centrifugal force, the clean medium is transported to the multi-stage compression module 4 through the tank hopper 23 and the drainage pipe 3. The purified gas (dust content < 5mg / m³) is smoothly transported to the multi-stage compression module 4 in a laminar flow state (flow velocity ≤ 2m / s) through the drainage pipe 3, and the inlet pressure fluctuation is controlled within ±1.5% to provide a stable working condition for subsequent compression.

[0054] Multi-stage Gradient Compression: The first-stage compressor 41 preliminarily pressurizes the medium, and the second-stage compressor 42 and the third-stage compressor 43 sequentially increase the pressure. Each stage of the compressor is independently adjusted by a variable-frequency motor according to demand to ensure a smooth and efficient compression process. The first-stage compressor 41 preliminarily pressurizes the medium, and the outlet temperature is controlled below 80°C through the built-in liquid injection cooling system. The second-stage compressor 42 further pressurizes, and at the same time, the variable-frequency motor reduces the rotational speed from the rated 3000rpm to 2700rpm according to the real-time load, reducing the energy consumption by 12%. The third-stage compressor 43 completes the final compression, saving 25% energy compared with single-stage compression. The outlet pressure of the third stage is stabilized at 2.5MPa ± 0.05MPa through PID closed-loop control.

[0055] Double - set counter - current heat exchange: The pressurized high - temperature medium (2.5 MPa, 280 °C) enters the air inlet 62 of the double - set heat exchange module 6 through the pressurizing pipe 5, and counter - currently contacts the low - temperature working medium (80 °C) flowing in from the liquid inlet 65 in the heat exchange coil 63. After absorbing heat, the temperature of the working medium rises to 240 °C and is transported to the steam generator or the process heating system through the liquid outlet 66. After the temperature of the medium drops to 120 °C, it is discharged from the air outlet 64 and can be further connected to the waste heat boiler for secondary utilization. The comprehensive heat recovery efficiency of the system is ≥92%.

[0056] Back - flushing cleaning and maintenance: Every 20 hours, the back - flushing component 8 is started once. The external high - pressure water pump injects 80 °C hot water into the pulse back - flushing pipe 82 at a pressure of 10 MPa, and forms an instantaneous shock wave (pulse width 50 ms) through the fan - shaped nozzle to strip the scale on the inner wall of the heat exchange coil 63. The back - flushing waste water is discharged through the drain valve. The whole process lasts for 5 minutes, and the heat exchange efficiency is restored to more than 98% of the initial value. The quick - disassembly design of the sealing sleeve 81 allows the nozzle to be replaced within 15 minutes, ensuring that the annual unplanned shutdown time of the back - flushing component 8 is <8 hours and the back - flushing component 8 starts regularly.

[0057] Intelligent regulation and monitoring: The PLC central controller integrates the OPC UA protocol and is seamlessly docked with the factory DCS system. Through the real - time data (sampling frequency 100 Hz) of the pressure gauge 16 and the solenoid valve 15, the rotational speed of the compressor, the opening of the valve, and the back - flushing frequency are dynamically adjusted. For example, when the flow rate of the liquid inlet pipe 13 drops suddenly by 30%, the system automatically reduces the rotational speed of the three - stage compressor 43 by 15% and closes one heat exchange tank 61 to maintain thermal balance, realizing stepless adjustment from 100% - 30% load.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counter - clockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0059] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0060] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. An industrial surplus pressure heat pump with high stability, comprising a base (1), characterized in that, A pressure buffering unit (2) is arranged on the top of the base (1), and a drainage pipe (3) is fixedly connected to the bottom of the pressure buffering unit (2). One outer wall of the drainage pipe (3) is fixedly connected with a multi-stage compression module (4). A pressurizing pipe (5) is arranged on the top of the multi-stage compression module (4). One outer wall of the pressurizing pipe (5) is provided with a double-set heat exchange module (6). An inlet pipe (7) is arranged on one side of the double-set heat exchange module (6). A backflush assembly (8) is arranged inside the double-set heat exchange module (6); The multi-stage compression module (4) includes a first-stage compressor (41), a second-stage compressor (42) and a third-stage compressor (43). Among them, the first-stage compressor (41), the second-stage compressor (42) and the third-stage compressor (43) are sequentially connected in series from bottom to top in order. And both between the first-stage compressor (41) and the second-stage compressor (42) and between the pump casings of the second-stage compressor (42) and the third-stage compressor (43) are fixedly connected by flanges.

2. The high-stability industrial surplus pressure heat pump according to claim 1, characterized in that, Independent variable-frequency motors are equipped on the outer walls of one ends of the first-stage compressor (41), the second-stage compressor (42) and the third-stage compressor (43).

3. The high-stability industrial surplus pressure heat pump according to claim 1, characterized in that, The pressure buffering unit (2) includes a cyclone separation buffer tank (21), a residual pressure inlet pipe (22) and a tank hopper (23). Among them, the cyclone separation buffer tank (21) is arranged on the top of the base (1). The residual pressure inlet pipe (22) is welded to the top of the outer wall on one side of the cyclone separation buffer tank (21). The tank hopper (23) is arranged at the bottom of the cyclone separation buffer tank (21). And the other outer wall of the drainage pipe (3) is fixedly connected to the bottom outer wall of the tank hopper (23) by a flange.

4. The high-stability industrial surplus pressure heat pump according to claim 1, characterized in that The double-set heat exchange module (6) includes a heat exchange tank (61), an air inlet (62), a heat exchange coil (63), an air outlet (64), a liquid inlet (65) and a liquid outlet (66). Among them, the heat exchange tank (61) is arranged on one side of the multi-stage compression module (4). The air inlet (62) is arranged at one end of the outer wall on one side of the heat exchange tank (61). The air outlet (64) is arranged at one end of the outer wall on the other side of the heat exchange tank (61). The heat exchange coil (63) is installed between the air inlet (62) and the air outlet (64). The liquid inlet (65) is arranged at the other end of the outer wall on one side of the heat exchange tank (61). And the liquid outlet (66) is arranged at the other end of the outer wall on the other side of the heat exchange tank (61).

5. The industrial surplus pressure heat pump with high stability according to claim 1, characterized in that, The backflush assembly (8) includes a sealing sleeve (81) and a pulse backflush pipe (82). Among them, the sealing sleeve (81) is fixedly connected to the outer wall of one end of the heat exchange tank (61) by a flange. The pulse backflush pipe (82) is inserted into the inner wall of the sealing sleeve (81). And one end of the pulse backflush pipe (82) is arranged inside the heat exchange tank (61).

6. The industrial surplus pressure heat pump with high stability according to claim 1, wherein A support frame (9) is fixedly connected to the outer wall of the top of the base (1) by screws. And the cyclone separation buffer tank (21) is welded to the inner wall of the support frame (9).

7. The high-stability industrial residual pressure heat pump according to claim 1, characterized in that, A support plate (10) is welded to the outer wall of the top of the base (1). And both heat exchange tanks (61) are installed on the outer wall of the support plate (10).

8. A highly stable industrial surplus pressure heat pump according to claim 1, characterized in that, One end of the outer wall of the air inlet (62) is fixedly connected to an air inlet pipe (11) through a flange, and one end of the outer wall of the air inlet (62) is fixedly connected to an air outlet pipe (12) through a flange.

9. The high-stability industrial surplus pressure heat pump according to claim 1, characterized in that, One end of the outer wall of the liquid inlet (65) is fixedly connected to a liquid inlet pipe (13) through a flange, and one end of the outer wall of the liquid outlet (66) is fixedly connected to a liquid outlet pipe (14) through a flange.

10. A highly stable industrial surplus pressure heat pump according to claim 8, characterized in that, Solenoid valves (15) and pressure gauges (16) are installed on the outer walls of the air inlet pipe (11) and the liquid inlet pipe (13).

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