A centrifugal vapor compressor

Abstract

The application provides a centrifugal vapor compressor and belongs to the technical field of vapor compressors. The centrifugal vapor compressor comprises a motor and a centrifugal vapor compressor, the motor is in power connection with the vapor compressor, a shaft coupling is arranged between the output end of the motor and the vapor compressor, an air inlet pipe is arranged on the vapor compressor, an air outlet pipe is arranged on the vapor compressor, a bypass pipe is arranged between the air inlet pipe and the air outlet pipe, a gas distribution ring is arranged on the inner wall of the air inlet pipe, the gas distribution ring is in communication with the bypass pipe, and the gas distribution ring is provided with an annular air outlet. The application has the following effects: the high-pressure steam in the bypass pipe is sprayed out in an annular state by the gas distribution ring, and is uniformly mixed with the original low-pressure steam in the air inlet pipe, so that the influence of airflow instability on the compression blades of the vapor compressor is reduced.

Description

Technical Field

[0001] This application relates to the field of steam compressor technology, and more specifically, to a centrifugal steam compressor. Background Technology

[0002] Centrifugal steam compressor units are energy-saving devices used in industrial steam cycles (such as MVR evaporation). Driven by a variable frequency motor, the steam compressor compresses and heats the steam to achieve energy recovery. It is equipped with a bypass pipe that flows from the exhaust pipe (high-pressure side) to the intake pipe (low-pressure side). Its core function is to prevent surge in the steam compressor and stabilize the unit's operating conditions. When downstream steam load fluctuates (e.g., when downstream equipment consumes less steam), the high-pressure steam in the exhaust pipe will increase in pressure because it cannot be discharged in time. Simultaneously, the intake pipe will experience a decrease in intake flow due to insufficient steam supply. If the flow rate falls below the critical value for stable compressor operation, the airflow at the impeller will experience severe pulsation and reverse flow, triggering surge (severe unit vibration, increased noise, and long-term component damage). At this time, the bypass pipe returns some of the high-pressure steam to the intake pipe, supplementing the intake flow, balancing the compressor's inlet and outlet pressures, ensuring the impeller is always in a stable airflow environment, and preventing surge. It also reduces frequent start-ups and shutdowns due to load fluctuations, maintaining overall operating efficiency.

[0003] The bypass pipe has a certain pressure. When it rushes into the intake pipe from the side, it will disturb the original low-pressure steam and form turbulence, which will affect the efficiency of the compressor blades to a certain extent. Utility Model Content

[0004] To overcome the above deficiencies, this application provides a centrifugal steam compressor, which aims to improve the problems mentioned in the background art.

[0005] This application provides a centrifugal steam compressor, including a motor and a centrifugal steam compressor. The motor is poweredly connected to the steam compressor. A coupling is provided between the output end of the motor and the steam compressor. The steam compressor is provided with an inlet and an outlet. A bypass port is provided between the inlet and the outlet. An air distribution ring is provided on the inner wall of the inlet. The air distribution ring is connected to the bypass port. The air distribution ring is provided with an annular outlet.

[0006] In one specific implementation, the system further includes an oil pan base assembly and an oil pipe assembly, wherein the oil pipe assembly connects the oil pan base assembly and the unit's lubrication components to deliver lubricating oil.

[0007] In the above process, the oil base assembly stores lubricating oil, and the oil pipe assembly constructs a lubrication circuit to deliver the lubricating oil to the steam compressor bearings, coupling curtains and other parts to achieve precise lubrication and reduce component wear.

[0008] In one specific implementation, the system further includes an inlet cone tube assembly and an outlet cone tube assembly, wherein the inlet cone tube assembly connects the air inlet port and the air inlet end of the steam compressor, and the outlet cone tube assembly connects the exhaust end of the steam compressor and the exhaust port.

[0009] In the above process, the inlet cone tube assembly and the outlet cone tube assembly adopt a cone-shaped flow channel design to rectify the airflow, reduce the resistance loss of the steam compressor, improve the compression efficiency, and facilitate precise connection with the pipeline.

[0010] In one specific implementation, it further includes a carbon ring sealed exhaust bracket, a carbon ring sealed water vapor inlet, and a carbon ring sealed water vapor outlet, wherein the carbon ring sealed exhaust bracket is used to install the carbon ring sealing assembly.

[0011] In the above implementation process, sealing steam is introduced into the carbon ring seal steam inlet, and after sealing, the steam is discharged from the carbon ring seal steam outlet. The carbon ring seal assembly is fixed by the carbon ring seal exhaust bracket to ensure stable sealing at the main shaft. The sealing steam forms a gas seal at the carbon ring seal to prevent compressed steam leakage. The carbon ring seal steam outlet maintains the pressure balance of the sealing system. The carbon ring seal structure is a conventional structure of a steam compressor, which will not be described in detail here.

[0012] In one specific implementation, it also includes a vortex chamber drainage system, a carbon ring seal drainage system, and a carbon ring seal air supply system.

[0013] In the above process, the vortex chamber drainage system drains the condensate from the chamber, the carbon ring seal drainage system drains the condensate to prevent water accumulation from affecting the seal, and the carbon ring seal air supply system maintains the sealing pressure and improves the sealing reliability. The above system is a conventional structure of a steam compressor, and will not be described in detail here.

[0014] In one specific implementation, the system further includes an outlet water supply system and a nozzle, wherein the outlet water supply system supplies water to the steam outlet of the steam compressor, and the nozzle atomizes the supplied water.

[0015] In the above process, the outlet water supply system works in conjunction with the nozzle to humidify and cool the high-temperature steam at the outlet, preventing damage to downstream equipment. At the same time, it adjusts the steam humidity to meet process requirements. The atomization effect of the nozzle ensures that the water and steam are fully mixed. The outlet water supply system is a conventional structure of a steam compressor, which will not be described in detail here.

[0016] In one specific implementation, the system also includes an electrical instrumentation system that monitors and controls parameters such as unit pressure, temperature, and flow rate.

[0017] In the above implementation process, the electrical system integrates sensors, controllers and actuators to acquire parameters such as inlet pressure and exhaust temperature in real time. When the parameters are abnormal, it can automatically control the opening of the bypass valve to achieve automated control and safety protection of the unit. Its control principle and detailed circuit belong to the conventional control structure of steam compressors, and will not be described in detail here.

[0018] In one specific implementation scheme, a pressure reducing valve assembly condensate inlet, a cooling water inlet, an end shell condensate inlet, a sealed condensate inlet, an oil cooler inlet, and an oil cooler outlet are also provided.

[0019] In the above process, cooling water is introduced into the cooling water inlet to cool the unit components. The condensate inlet of the pressure reducing valve group, the condensate inlet of the end shell, and the sealed condensate inlet discharge the condensate from their respective locations. The oil cooler inlet and outlet circulate the cooling water in the oil cooler. The cooling water in the cooling water inlet maintains a reasonable temperature for the unit components. The condensate inlets drain the condensate to prevent corrosion and heat loss. The cooling water circulation in the oil cooler inlet and outlet reduces the temperature of the lubricating oil, ensuring the stability of the lubrication system and indirectly protecting the unit components.

[0020] Compared with the prior art, the beneficial effect of this application is that the high-pressure steam in the bypass port is axially ejected in a ring shape by using the air distribution ring, and is uniformly mixed with the original low-pressure steam in the inlet port, so as to reduce the impact of unstable airflow on the compression blades of the steam compressor. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a first-view schematic diagram of a centrifugal steam compressor provided in the embodiments of this application; Figure 2 A schematic diagram of a centrifugal steam compressor (without motor) provided for an embodiment of this application; Figure 3 A first-view schematic diagram of a centrifugal steam compressor provided for an embodiment of this application; Figure 4 A schematic diagram showing the connection between the air distribution ring and the air inlet and bypass port provided in the embodiments of this application.

[0023] In the diagram: 1-Motor; 2-Steam compressor; 3-Oil pan base assembly; 4-Oil pipe assembly; 5-Inlet cone pipe assembly; 6-Outlet cone pipe assembly; 7-Carbon ring seal exhaust support; 8-Vortex chamber drainage system; 9-Carbon ring seal drainage system; 10-Carbon ring seal air supply system; 11-Outlet water supply system; 12-Nozzle; 13-Coupling; 14-Electrical and instrumentation system; 15-Air distribution ring; N1 - Inlet port; N2 - Exhaust port; N3 - Bypass port; N4 - Carbon ring sealed steam inlet; N5 - Carbon ring sealed steam outlet; N6 - Pressure reducing valve assembly condensate port; N7 - Cooling water port; N8 - End shell condensate port; N9 - Sealed condensate port; N10 - Oil cooler inlet; N11 - Oil cooler outlet. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0025] Please see Figures 1-4 This application provides a centrifugal steam compressor, including a motor 1 and a centrifugal steam compressor 2. The motor 1 is poweredly connected to the steam compressor 2. A coupling 13 is provided between the output end of the motor 1 and the steam compressor 2. The steam compressor 2 is provided with an inlet port N1 and an outlet port N2. A bypass port N3 is provided between the inlet port N1 and the outlet port N2. A gas distribution ring 15 is provided on the inner wall of the inlet port N1, and the gas distribution ring 15 is connected to the bypass port N3. The gas distribution ring 15 is provided with an annular outlet. The high-pressure steam in the bypass port N3 is axially sprayed out in an annular shape by the gas distribution ring 15, and is uniformly mixed with the original low-pressure steam in the inlet port N1 to reduce the impact of unstable airflow on the compression blades of the steam compressor 2.

[0026] Please see Figures 1-4 It also includes an oil pan base assembly 3 and an oil pipe assembly 4. The oil pipe assembly 4 connects the oil pan base assembly 3 and the unit's lubrication components, delivering lubricating oil to them. The oil pan base assembly 3 stores lubricating oil, and the oil pipe assembly 4 forms a lubrication circuit, delivering lubricating oil to the bearings of the steam compressor 2, the coupling curtain 13, and other parts to achieve precise lubrication and reduce component wear.

[0027] Please see Figures 1-4 It also includes an inlet cone tube assembly 5 and an outlet cone tube assembly 6. The inlet cone tube assembly 5 connects the inlet port N1 and the inlet end of the steam compressor 2, and the outlet cone tube assembly 6 connects the outlet end of the steam compressor 2 and the outlet port N2. The inlet cone tube assembly 5 and the outlet cone tube assembly 6 adopt a cone-shaped flow channel design to rectify the airflow, reduce the resistance loss when entering and exiting the steam compressor 2, improve the compression efficiency, and facilitate precise docking with pipelines.

[0028] Please see Figures 1-4It also includes a carbon ring seal exhaust bracket 7, a carbon ring seal steam inlet N4, and a carbon ring seal steam outlet N5. The carbon ring seal exhaust bracket 7 is used to install the carbon ring seal assembly. Sealing steam is introduced into the carbon ring seal steam inlet N4, and after sealing, the steam is discharged from the carbon ring seal steam outlet N5. The carbon ring seal assembly is fixed by the carbon ring seal exhaust bracket 7 to ensure stable sealing at the main shaft. The sealing steam forms a gas seal at the carbon ring seal to prevent compressed steam leakage. The carbon ring seal steam outlet N5 maintains the pressure balance of the sealing system. The carbon ring seal structure is a conventional structure of the steam compressor 2, which will not be described in detail here.

[0029] Please see Figures 1-4 It also includes a volute drainage system 8, a carbon ring seal drainage system 9, and a carbon ring seal air supply system 10. The volute drainage system 8 drains the condensate from the chamber, the carbon ring seal drainage system 9 drains the condensate to prevent water accumulation from affecting the seal, and the carbon ring seal air supply system 10 maintains the sealing pressure and improves the reliability of the seal. The above systems are the conventional structure of the steam compressor 2, and will not be described in detail here.

[0030] Please see Figures 1-4 It also includes an outlet water supply system 11 and a nozzle 12. The outlet water supply system 11 replenishes moisture to the steam outlet of the steam compressor 2, and the nozzle 12 atomizes the replenished moisture. The outlet water supply system 11 and the nozzle 12 work together to humidify and cool the high-temperature steam at the outlet, preventing damage to downstream equipment, and at the same time adjusting the steam humidity to meet process requirements. The atomization effect of the nozzle 12 ensures that the moisture and steam are fully mixed. The outlet water supply system 11 is a conventional structure of the steam compressor 2, and will not be described in detail here.

[0031] Please see Figures 1-4 It also includes an electrical and instrumentation system 14, which monitors and controls parameters such as unit pressure, temperature, and flow rate. The electrical and instrumentation system 14 integrates sensors, controllers, and actuators to acquire parameters such as the inlet pressure at inlet port N1 and the exhaust temperature at outlet port N2 in real time. When parameters are abnormal, it can automatically control the opening of the bypass valve N3, achieving automated control and safety protection of the unit. Its control principle and detailed circuitry belong to the conventional control structure of the steam compressor 2, and will not be described in detail here.

[0032] Please see Figures 1-4It is also equipped with a pressure reducing valve group condensate inlet N6, a cooling water inlet N7, an end shell condensate inlet N8, a sealing condensate inlet N9, an oil cooler inlet N10, and an oil cooler outlet N11. Cooling water is introduced through cooling water inlet N7 to cool the unit components. Condensate inlets N6, N8, and N9 of the pressure reducing valve group discharge condensate from their respective locations. The oil cooler inlet N10 and outlet N11 circulate the cooling water in the oil cooler. The cooling water inlet N7 maintains a reasonable temperature for the unit components. The condensate inlets discharge condensate to prevent corrosion and heat loss. The cooling water circulation in the oil cooler inlet and outlet lowers the lubricating oil temperature, ensuring the stability of the lubrication system and indirectly protecting the unit components.

[0033] The working principle of the centrifugal steam compressor is as follows: The motor 1 is equipped with a load monitoring sensor, including parameters such as temperature and current, which is used to control the bypass valve on the bypass port N3 to introduce high-pressure steam from the exhaust port N2 into the intake port N1. Specifically, the high-pressure steam first enters the air distribution ring 15, and after filling the air distribution ring 15, it is ejected from the annular outlet. The ejected airflow is evenly mixed with the original low-pressure steam in the intake port N1 to reduce the impact of unstable airflow on the compression blades of the steam compressor 2.

[0034] In summary, the high-pressure steam in the bypass port N3 is axially ejected in a ring shape by the air distribution ring 15, and mixed evenly with the original low-pressure steam in the inlet port N1, so as to reduce the impact of unstable airflow on the compression blades of the steam compressor 2.

[0035] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A centrifugal steam compressor, characterized in that, The device includes a motor (1) and a centrifugal steam compressor (2). The motor (1) is powered to the steam compressor (2). A coupling (13) is provided between the output end of the motor (1) and the steam compressor (2). The steam compressor (2) is provided with an air inlet (N1) and an exhaust port (N2). A bypass port (N3) is provided between the air inlet (N1) and the exhaust port (N2). An air distribution ring (15) is provided on the inner wall of the air inlet (N1). The air distribution ring (15) is connected to the bypass port (N3). The air distribution ring (15) is provided with an annular air outlet.

2. A centrifugal steam compressor according to claim 1, characterized in that, It also includes an oil pan base assembly (3) and an oil pipe assembly (4), the oil pipe assembly (4) connecting the oil pan base assembly (3) and the unit lubrication components to deliver lubricating oil to them.

3. A centrifugal steam compressor according to claim 2, characterized in that, It also includes an inlet cone tube assembly (5) and an outlet cone tube assembly (6), wherein the inlet cone tube assembly (5) is connected to the inlet port (N1) and the inlet end of the steam compressor (2), and the outlet cone tube assembly (6) is connected to the exhaust end of the steam compressor (2) and the exhaust port (N2).

4. A centrifugal steam compressor according to claim 3, characterized in that, It also includes a carbon ring seal exhaust bracket (7), a carbon ring seal water vapor inlet (N4) and a carbon ring seal water vapor outlet (N5), wherein the carbon ring seal exhaust bracket (7) is used to install the carbon ring seal assembly.

5. A centrifugal steam compressor according to claim 4, characterized in that, It also includes a vortex drainage system (8), a carbon ring seal drainage system (9), and a carbon ring seal air supply system (10).

6. A centrifugal steam compressor according to claim 5, characterized in that, It also includes an outlet water supply system (11) and a nozzle (12), wherein the outlet water supply system (11) supplies water to the steam outlet of the steam compressor (2), and the nozzle (12) atomizes the supplied water.

7. A centrifugal steam compressor according to claim 6, characterized in that, It also includes an electrical instrumentation system (14) that monitors and controls the unit's pressure, temperature, and flow parameters.

8. A centrifugal steam compressor according to claim 7, characterized in that, It is also equipped with a pressure reducing valve assembly condensate inlet (N6), cooling water inlet (N7), end shell condensate inlet (N8), sealed condensate inlet (N9), oil cooler inlet (N10) and oil cooler outlet (N11).

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