Condensate conveying and heat exchange system of double-air-source floating ball power pump
By designing a dual-air-source float power pump and a hot water heater, the cavitation problem in high-temperature condensate transportation was solved, achieving stable condensate recovery and efficient energy utilization, and reducing equipment wear and operating costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional centrifugal pumps are prone to cavitation when conveying high-temperature condensates, leading to equipment corrosion and vibration. Furthermore, existing steam condensate recovery systems are complex and costly, failing to effectively solve the cavitation problem.
The system employs a design with three parallel dual-air-source float power pumps, combined with a Y-type filter and dual check valves, along with a hot water heater and temperature control valve, to achieve stable condensate recovery and energy utilization, while reducing energy consumption through dual-air-source switching.
It achieves stable condensate delivery and efficient energy recovery, reduces equipment wear and operating costs, and improves system reliability and energy utilization.
Smart Images
Figure CN224094957U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of condensate transport and heat exchange technology, specifically relating to a dual-air-source float power pump condensate transport and heat exchange system. Background Technology
[0002] In traditional processes, high-temperature condensate (usually containing residual steam at 100-150℃) is difficult to directly return due to pipeline pressure limitations. When transported by ordinary centrifugal pumps, the uncondensed steam in the condensate rapidly vaporizes in the low-pressure area of the impeller to form cavitation bubbles. When these bubbles rupture, they generate high-frequency impact forces of up to several thousand hertz, leading to impeller corrosion, a sharp drop in pump efficiency, and vibration problems. This phenomenon originates from the local pressure drop caused by the high-speed rotation of the centrifugal pump impeller, which is lower than the saturated vapor pressure of the condensate, resulting in cavitation, which is especially pronounced under two-phase flow conditions.
[0003] CN219473628U discloses a steam condensate recovery and utilization device, which integrates steam condensate pipelines, steam pipelines, and heat exchange return pipelines through a steam condensate tank to recover waste heat from the condensate for heating other equipment. The device is equipped with a thermometer, level gauge, and pressure gauge for automatic regulation. When the condensate temperature is insufficient, steam is added to raise the temperature. An overflow port and drainage pipeline prevent the liquid level from becoming too high. The circulation pipeline combined with a glass window can monitor impurities and improve the thermal energy utilization rate. This device is energy-saving and reduces consumption, efficiently utilizes waste heat, reduces equipment corrosion, and supports heating of multiple devices and automated control. However, it involves high system complexity, increased installation and maintenance costs, and requires a steam trap and circulation pump. In addition, this device neglects the cavitation problem of steam on the circulation pump.
[0004] Therefore, it is necessary to design a steam condensate conveying system to achieve stable condensate recovery while reducing equipment wear and tear. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a dual-air-source float power pump condensate delivery and heat exchange system. It adopts a dual-air-source design with three float power pumps connected in parallel, and is equipped with a Y-type filter and double check valves to prevent backflow, ensuring the stability of system operation. The dual-air-source design reduces energy consumption. At the same time, a hot water heater is set up to improve the utilization rate of steam waste heat and significantly improve operational reliability. A bypass is set at the hot water heater to realize the control of the temperature control valve and thermometer loop, ensuring stable condensate return.
[0006] The dual-gas-source float power pump condensate conveying heat exchange system of this utility model includes an analytical tower. The analytical tower is provided with a pipeline connected to the bottom of the reboiler at the bottom of the tower. The reboiler at the bottom of the tower is connected to a heating steam pipeline. The bottom of the reboiler at the bottom of the tower is provided with a pipeline connected to a manifold. The manifold is connected to a power pump unit, and the power pump unit is connected to a steam condensate conveying pipeline. The top of the power pump unit is connected to the inlet of the hot water heater through an exhaust pipeline. Before the exhaust pipeline is connected to the inlet of the hot water heater, a condensate drain pipeline is led out in parallel to drain the residual steam and condensate in the pipeline when the power source is replaced. The top of the power pump unit is provided with a pipeline connected to the dual-gas-source system. The condensate outlet at the bottom of the hot water heater is provided with a pipeline that returns to the manifold, and a thermometer is installed on the pipeline.
[0007] Preferably, the top of the reboiler at the bottom of the tower is provided with a pipeline for reflux to the stripping tower; a pressure gauge is provided on the manifold.
[0008] Preferably, the power pump set consists of three power pumps connected in parallel, and the dual air source system consists of a power steam pipeline and a compressed air pipeline; the three power pumps have the same structure and pipeline connection method, and further, two of the three power pumps are in use and one is on standby during operation.
[0009] Preferably, a Y-type filter and a check valve are sequentially installed on the pipeline connecting the manifold and the power pump.
[0010] Preferably, the bottom of the power pump is provided with a pump body drain pipe, and the top of the power pump is connected to a power steam pipe and a compressed air pipe to form a dual air source drive structure.
[0011] Preferably, the power pump is connected to the silencer through two parallel pipelines, one of which is directly connected to the silencer, and the other is connected to the silencer through a safety valve; furthermore, an exhaust pipeline is provided after the silencer for discharging exhaust gas.
[0012] Preferably, the hot water heater is provided with a bypass, which connects the inlet exhaust pipe and the outlet condensate pipe of the hot water heater. A temperature control valve is provided on the bypass, and the temperature control valve and the thermometer form a control loop.
[0013] Preferably, the hot water outlet at the top of the hot water heater is provided with a pipeline connected to the pump room, the heating outlet of the pump room is connected to the water tank, and the water tank is connected to the hot water inlet at the bottom of the hot water heater through a heating pump.
[0014] Preferably, the power pump is a dual-source float power pump. Condensate inlets and outlets are provided on opposite side walls of the power pump, and a power air source inlet and exhaust port are provided on the top. An internal float linkage device is installed. The working principle of the dual-source float power pump is as follows: When the equipment starts, the exhaust port opens and the power air source inlet closes. Steam condensate enters the pump body through the internal valve, causing the float to rise. Steam in the pump body is discharged from the exhaust port. When the pump body is full of condensate, the pump linkage device opens the power air source inlet and closes the exhaust port. Under the pressure of the power air source, the condensate is discharged and enters the steam condensate delivery pipeline. When the pump level drops, the pump linkage device opens the exhaust port and closes the power air source port. The steam condensate then enters the pump body again through the inlet check valve for another working cycle.
[0015] Specifically, the working process of the dual-source float power pump condensate conveying heat exchange system is as follows: the material from the bottom of the desorption tower is heated in the reboiler at the bottom of the tower and then returned to the desorption tower. Meanwhile, the steam transported via the heating steam pipeline exchanges heat in the reboiler at the bottom of the tower, generating steam condensate. The steam condensate enters the manifold and is then transported to the power pump group. Three power pumps are connected in parallel in the power pump group, two in operation and one on standby. Before entering the power pump, the steam condensate needs to be filtered through a Y-type filter and then enters the dual-source float power pump through a check valve. As the condensate fills the entire pump chamber, the float in the pump chamber begins to rise with the increase in condensate. Simultaneously, the residual condensate in the pump chamber... The gas is discharged through the exhaust port at the top of the pump chamber. When the pump body is filled with condensate, the pump's linkage device opens the power air source inlet and closes the exhaust port. The condensate in the pump body is "driven out" by the power air source coming in from the top of the pump and then sent into the condensate pipeline through the pump outlet check valve. As the condensate in the pump chamber decreases, the float floating on the condensate sinks. When the float falls to the lowest point of the pump chamber, the float rod pulls the linkage device, closing the power air source inlet at the top of the power pump and opening the exhaust port. As the gas in the pump body is discharged, the steam condensate re-enters the pump body through the power pump inlet check valve, and so on.
[0016] In winter, 1.0 MPa steam is generally used as the power source. In other seasons, to save on steam costs, 1.0 MPa compressed air is used. When using 1.0 MPa steam as the power source in winter, the steam discharged from the power pump's exhaust port enters the hot water heater through pipelines. In the hot water heater, it exchanges heat with the heating water from the heating pump. The heated heating water then enters the pump room heating system and returns to the water tank through the heating return pipeline. The condensate from the steam exchanged in the hot water heater flows back to the manifold, where it meets the condensate from the reboiler at the bottom of the tower. It is then pumped out again. In other seasons, [the following applies]. 1.0MPa compressed air is selected as the power source. The compressed air discharged from the exhaust port of the power pump enters the silencer through the pipeline and then is discharged into the atmosphere at high pressure. At the same time, two parallel branches are set on the pipeline connecting the power pump and the hot water heater. One branch is equipped with a safety valve. If the system is over-pressurized, the steam (compressed air) can be released to the silencer through the safety valve and then discharged into the atmosphere at high pressure. The other branch is a condensate drain pipeline, which is used to drain the steam and condensate in the pipeline when the 1.0MPa steam is stopped.
[0017] Finally, a bypass is installed at the hot water heater, and a temperature control valve is installed on the bypass. After the steam condensate finishes heat exchange in the hot water heater, the generated steam condensate flows back to the manifold. A thermometer is installed on the return pipe. When the condensate temperature is lower than the process temperature, the condensate cannot flow back to the manifold. At this time, the temperature control valve opens in conjunction, and the steam discharged from the exhaust port of the power pump enters the return pipe through the bypass, providing power support for the condensate to enter the manifold.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] (1) The dual-air-source float power pump condensate conveying heat exchange system of this utility model adopts a dual-air-source design. In winter, while using steam power source, waste heat is recovered through hot water heater for heating, thereby improving energy utilization. In other seasons, compressed air is switched to reduce steam consumption costs. The float linkage mechanism of the power pump and the exhaust heat recovery design further reduce energy waste and achieve efficient and energy-saving operation.
[0020] (2) The dual-air-source float power pump condensate conveying and heat exchange system of this utility model adopts a three-unit parallel structure (two for use and one for standby) power pump set, combined with Y-type filter and check valve to ensure the continuity of condensate conveying and the ability to control impurities; a bypass is set at the hot water heater, and the closed-loop control formed by the thermometer and temperature control valve ensures that the condensate after heat exchange can be returned to the manifold, ensuring the stable recovery of condensate. Attached Figure Description
[0021] Figure 1This is a schematic diagram of the structure of the dual-air-source float power pump condensate conveying and heat exchange system in this utility model.
[0022] In the diagram: 1. Reboiler at the bottom of the tower; 2. Manifold; 3. Filter; 4. Power pump; 5. Power steam pipeline; 6. Compressed air pipeline; 7. Hot water heater; 8. Heating pump; 9. Water tank; 10. Pump room; 11. Silencer; 12. Steam condensate delivery pipeline; 13. Pump body drain pipeline; 14. Thermometer; 15. Temperature control valve; 16. Pressure gauge; 17. Desorption tower; 18. Safety valve; 19. Heating steam pipeline; 20. Condensate drain pipeline; 21. Check valve. Detailed Implementation
[0023] The specific technical solution of this utility model will be further explained below with reference to the accompanying drawings.
[0024] like Figure 1 As shown, the dual-gas-source float power pump condensate delivery heat exchange system includes a bottom reboiler 1 and a manifold 2. The bottom reboiler 1 is connected to a heating steam pipeline 19, and a pipeline connected to the manifold 2 is provided at the bottom of the bottom reboiler 1. The manifold 2 is connected to a power pump unit, which is connected to a steam condensate delivery pipeline 12. A check valve 21 is provided on the steam condensate delivery pipeline 12. The top of the power pump unit is connected to the inlet of a hot water heater 7 through an exhaust pipeline, and a pipeline connected to the dual-gas-source system is provided at the top of the power pump unit. A pipeline returning to the manifold 2 is provided at the bottom condensate outlet of the hot water heater 7, and a thermometer 14 is provided on the pipeline.
[0025] The bottom of the reboiler 1 is connected to the stripping column 17, and the top is provided with a pipeline for reflux to the stripping column 17. A pressure gauge 16 is provided on the manifold 2.
[0026] The power pump set consists of three parallel power pumps 4, and the dual air source system consists of a power steam pipeline 5 and a compressed air pipeline 6. The three power pumps 4 have the same structure and pipeline connection method. A Y-type filter 3 and a check valve 21 are installed in sequence on the pipeline connecting the manifold 2 and the power pump 4.
[0027] The power pump 4 is provided with a pump body drain pipe 13 at the bottom, and the top of the power pump 4 is connected to the power steam pipe 5 and the compressed air pipe 6.
[0028] The power pump 4 is connected to the silencer 11 through two parallel pipelines, one of which is directly connected to the silencer 11, and the other is connected to the silencer 11 through the safety valve 18.
[0029] A bypass is provided at the hot water heater 7. The bypass connects the inlet steam exhaust pipe and the outlet condensate pipe of the hot water heater 7. A temperature control valve 15 is provided on the bypass. The temperature control valve 15 and the thermometer 14 form a control loop.
[0030] Before the exhaust pipe is connected to the inlet of the hot water heater 7, a condensate drain pipe 20 is connected in parallel to drain the residual steam and condensate in the pipe when the power source is replaced.
[0031] The hot water heater 7 has a hot water outlet at the top connected to a pipeline connected to the pump room 10. The heating outlet of the pump room 10 is connected to the water tank 9. The water tank 9 is connected to the hot water inlet at the bottom of the hot water heater 7 via a heating pump 8.
[0032] The power pump 4 is a dual-source float power pump. Condensate inlets and outlets are located on opposite side walls of the power pump 4, and a power air source inlet and exhaust port are located on the top. An internal float linkage device is installed. The working principle of the dual-source float power pump is as follows: When the equipment starts, the exhaust port opens and the power air source inlet closes. Steam condensate enters the pump body through the inlet check valve 21, causing the float to rise. Steam in the pump body is discharged from the exhaust port. When the pump body is full of condensate, the pump linkage device opens the power air source inlet and closes the exhaust port. Under the pressure of the power air source, the condensate is discharged and enters the steam condensate delivery pipeline 12. When the pump level drops, the pump linkage device opens the exhaust port and closes the power air source port. Steam condensate then enters the pump body again through the inlet check valve 21 for another working cycle.
[0033] The dual-source float-powered pump condensate conveying and heat exchange system operates as follows: Material from the bottom of the analytical column 17 is heated in the bottom reboiler 1 and then returned to the analytical column 17. Steam transported via the heating steam pipeline 19 undergoes heat exchange in the bottom reboiler 1, generating steam condensate. The steam condensate enters the manifold 2 and is then conveyed to the power pump group. Three power pumps 4 are connected in parallel in the power pump group, with two in operation and one as a backup. Before entering the power pump 4, the steam condensate is filtered through a Y-type filter 3 and then enters the power pump 4 through the inlet check valve 21. As the condensate fills the entire pump chamber, the float inside the pump chamber rises with the increase in condensate. Simultaneously, the pump chamber... The remaining gas inside is discharged through the exhaust port at the top of the pump chamber. When the pump body is filled with condensate, the pump's linkage device opens the power air source inlet and closes the exhaust port. The condensate inside the pump body is "driven out" by the power air source coming in from the top of the pump, and then sent into the condensate pipeline through the pump outlet check valve 21. As the condensate in the pump chamber decreases, the float floating on the condensate sinks. When the float falls to the lowest point of the pump chamber, the float rod pulls the linkage device, the power air source inlet at the top of the power pump 4 closes, and the exhaust port opens. As the gas inside the pump body is discharged, the steam condensate enters the pump body again through the power pump 4 inlet check valve 21, and so on.
[0034] In winter, 1.0 MPa steam is generally used as the power source. In other seasons, to save on steam costs, 1.0 MPa compressed air is used. When using 1.0 MPa steam as the power source in winter, the steam discharged from the exhaust port of the power pump 4 enters the hot water heater 7 through a pipeline. In the hot water heater 7, it exchanges heat with the heating water from the heating pump 8. The heated heating water then enters the heating system in the pump room 10, and then returns to the water tank 9 through the heating return water pipeline. The condensate from the steam exchanged in the hot water heater 7 flows back to the manifold 2, where it meets the condensate from the reboiler 1 at the bottom of the tower, and is then sent out by the power pump 4. In other seasons, it can... 1.0MPa compressed air is selected as the power source. The compressed air discharged from the exhaust port of the power pump 4 enters the silencer 11 through the pipeline and is discharged into the air at a high pressure. At the same time, two parallel branches are set on the pipeline connecting the power pump 4 and the hot water heater 7. One branch is equipped with a safety valve 18. If the system is over-pressurized, the steam (compressed air) can be released to the silencer 11 through the safety valve 18 and then discharged into the air at a high pressure. The other branch is a condensate drain pipeline 20, which is used to drain the steam and condensate in the pipeline when the 1.0MPa steam is stopped.
[0035] Finally, a bypass is installed at the hot water heater 7, and a temperature control valve 15 is installed on the bypass. After the steam condensate finishes heat exchange in the hot water heater 7, the generated steam condensate flows back to the manifold 2. A thermometer 14 is installed on the return pipe. When the condensate temperature is lower than the process temperature, the condensate cannot flow back to the manifold 2. At this time, the temperature control valve 15 opens in conjunction, and the steam discharged from the exhaust port of the power pump 4 enters the return pipe through the bypass, providing power support for the condensate to enter the manifold 2.
Claims
1. A dual-air-source float-powered pump condensate transport and heat exchange system, characterized in that, The system includes a bottom reboiler (1) and a manifold (2). The bottom reboiler (1) is connected to a heating steam pipeline (19), and a pipeline connected to the manifold (2) is provided at the bottom of the bottom reboiler (1). The manifold (2) is connected to a power pump set, and the power pump set is connected to a steam condensate delivery pipeline (12). A check valve (21) is provided on the steam condensate delivery pipeline (12). The top of the power pump set is connected to the inlet of a hot water heater (7) through an exhaust pipeline. A pipeline connected to a dual gas source system is provided at the top of the power pump set. A pipeline is provided at the bottom condensate outlet of the hot water heater (7) to return to the manifold (2), and a thermometer (14) is provided on the pipeline.
2. The dual-air-source float power pump condensate conveying and heat exchange system according to claim 1, characterized in that, The bottom of the reboiler (1) is connected to the stripping column (17), and the top is provided with a pipeline for reflux to the stripping column (17); a pressure gauge (16) is provided on the manifold (2).
3. The dual-air-source float-powered pump condensate conveying and heat exchange system according to claim 1, characterized in that, The power pump set consists of three parallel power pumps (4), and the dual air source system consists of a power steam pipeline (5) and a compressed air pipeline (6). The power pump (4) is a dual air source float power pump. The structure and pipeline connection method of the three power pumps (4) are the same. A Y-type filter (3) and a check valve (21) are installed in sequence on the pipeline connecting the manifold (2) and the power pump (4).
4. The dual-air-source float power pump condensate conveying and heat exchange system according to claim 3, characterized in that, The power pump (4) is provided with a pump body drain pipe (13) at the bottom, and the top of the power pump (4) is connected to the power steam pipe (5) and the compressed air pipe (6) to form a dual air source drive structure.
5. The dual-air-source float power pump condensate conveying and heat exchange system according to claim 3, characterized in that, The power pump (4) is connected to the silencer (11) through two parallel pipelines. One pipeline is directly connected to the silencer (11), and the other pipeline is connected to the silencer (11) through a safety valve (18).
6. The dual-air-source float power pump condensate conveying and heat exchange system according to claim 1, characterized in that, The hot water heater (7) is provided with a bypass, which connects the inlet exhaust pipe and the outlet condensate pipe of the hot water heater (7). A temperature control valve (15) is provided on the bypass, and the temperature control valve (15) and the thermometer (14) form a control loop.
7. The dual-air-source float power pump condensate conveying and heat exchange system according to claim 1, characterized in that, Before the exhaust pipe is connected to the inlet of the hot water heater (7), a condensate drain pipe (20) is connected in parallel to drain the residual steam and condensate in the pipe when the power source is replaced.
8. The dual-air-source float power pump condensate conveying and heat exchange system according to claim 1, characterized in that, The hot water heater (7) is equipped with a pipeline at the top hot water outlet that is connected to the pump room (10). The heating outlet of the pump room (10) is connected to the water tank (9). The water tank (9) is connected to the hot water inlet at the bottom of the hot water heater (7) through the heating pump (8).