Condensate pressurization and deoxidation integrated device based on ship exhaust steam and ship power system

Abstract

The invention relates to the field of ship power technology, and discloses a condensate pressurization and deoxygenation integrated device based on ship exhaust steam and a ship power system, wherein the condensate pressurization and deoxygenation integrated device comprises: a heat sink, a steam turbine drive device, a condensate pressurization device and a heating deoxygenation device; the steam turbine drive device drives and connects the condensate pressurization device, and the condensate pressurization device and the heating deoxygenation device are arranged in the heat sink; the steam turbine drive device is used to drive the condensate pressurization device to operate based on the exhaust steam introduced, so that the condensate in the heat sink is output from its condensate outlet at a preset pressure; the exhaust steam output by the steam turbine drive device is used to be introduced into the heating deoxygenation device; based on the reuse of the residual energy of the exhaust steam, the invention realizes the integration of the device layout structure while pressurizing and outputting the condensate in the heat sink and heating and deoxygenating it, thereby reducing the demand for the use of the internal space of the ship and improving the environmental adaptability and economic efficiency of the ship power system.

Description

Technical Field

[0001] The present invention relates to the field of ship power technology, and in particular to a condensate pressurization and deoxidation integrated device based on ship exhaust steam and a ship power system. Background Art

[0002] At present, large ships often use steam turbines as driving power sources, so steam cooling and condensate removal equipment become essential thermal cycle equipment. Figure 1 As shown, after heat exchange, the cooler 1 on the ship discharges the waste heat in the form of condensed water to the heat well 2 below it. A booster pump 12 is provided on one side of the condensate outlet 21 of the heat well 2 to increase the pressure of the condensed water output by the heat well 2 and supply it to the heating boiler, thereby generating new steam used as a power drive. In this process, the exhaust steam output by other steam-using equipment after work is also introduced, and the exhaust steam is passed into the condensed water of the heat well 2 to heat the condensed water and achieve preliminary deoxygenation treatment of the condensed water.

[0003] However, in actual implementation, due to the constraints of the limited space inside the ship, there must be a distance between the heat sink and the booster pump to have enough space to arrange the equipment. In addition, the exhaust steam also has a certain amount of usable energy. Directly flowing to the heat sink to heat and deoxygenate the condensed water will result in the thermal energy of the exhaust steam not being fully utilized, thereby reducing the economy of the ship's power system.

[0004] Specifically, during the voyage, the ship will sway left and right and sway forward and backward with the wind and waves, which causes the inlet pressure of the booster pump to change unpredictably. When the inlet height of the booster pump is greater than the condensate outlet height of the heat well and exceeds a certain margin, the condensate filling height of the booster pump is correspondingly reduced. At this time, the inlet pressure of the booster pump is less than the preset pressure, which causes the operating state of the booster pump to deteriorate and cavitation occurs, generating additional vibration and noise. If the booster pump runs for a long time under this condition, the blades of the booster pump will be eroded or broken, and even serious failures will occur. At the same time, due to the lack of ship space between the heat well and the booster pump, the two must be separated and arranged at a distance. Due to the demand for inlet pressure of the booster pump during stable operation, the booster pump must be arranged close to the heat well, which greatly limits the freedom of the booster pump arrangement on the ship. In addition, the utilization of the exhaust steam energy on the ship is not sufficient, which greatly reduces the economy of the ship's power system.

[0005] Based on the above technical status, it is currently difficult to achieve free arrangement of the booster pump relative to the heat sink within the limited ship space while achieving effective utilization of exhaust steam energy, thereby making it difficult to ensure the environmental adaptability and economical operation of the ship's power system. Summary of the invention

[0006] The embodiment of the present invention provides a condensate pressurization and deoxygenation integrated device based on ship exhaust steam to solve the current problem that it is difficult to freely arrange the booster pump relative to the heat sink in the limited ship space and realize the effective utilization of exhaust steam energy.

[0007] An embodiment of the present invention also provides a ship power system based on the above-mentioned condensate pressurization and deoxygenation integrated device based on ship exhaust steam.

[0008] In order to solve the above technical problems, an embodiment of the present invention provides, on the one hand, an integrated condensate pressurization and deoxygenation device based on ship exhaust steam, comprising: a heat sink, a steam turbine drive device, a condensate pressurization device and a heating deoxygenation device; the steam turbine drive device drives and connects the condensate pressurization device, and the condensate pressurization device and the heating deoxygenation device are arranged in the heat sink; the steam turbine drive device is used to drive the condensate pressurization device to operate based on the introduced exhaust steam, so that the condensed water in the heat sink is output from its condensate outlet at a preset pressure; the exhaust steam output by the steam turbine drive device is used to be passed into the heating deoxygenation device.

[0009] The exhaust steam output by the steam turbine driving device is also used to be passed into a cooler, and the cooler is installed on the upper side of the heat sink. The condensed water generated by the cooler is passed into the heat sink.

[0010] Among them, the steam turbine driving device is coaxially connected to the condensate boosting device, the steam turbine driving device is arranged on the outer side wall of the heat well, the condensate boosting device and the heating and deoxygenation device are arranged at the bottom of the heat well, and the output end of the condensate boosting device is connected to the condensate outlet.

[0011] Among them, the steam turbine drive device includes an exhaust steam chamber and an exhaust steam turbine, the exhaust steam turbine is rotatably installed in the exhaust steam chamber, and an exhaust steam inlet and an exhaust steam outlet are provided on the side wall of the exhaust steam chamber; the condensate boosting device includes a boosting impeller and a condensate flow channel, the output end of the exhaust steam turbine is coaxially connected to the boosting impeller, the boosting impeller is placed in the condensate flow channel, the input end of the condensate flow channel is used to drain the condensate in the heat trap, and the output end of the condensate flow channel is connected to the condensate outlet.

[0012] Wherein, the heating and deoxygenation device comprises an aeration pipe, and the aeration pipe is arranged in a coil shape at the bottom of the heat well, and a plurality of aeration micropores are opened on the side wall of the aeration pipe.

[0013] The exhaust steam outputted by the steam turbine driving device is led to the heating and deoxidizing device through a first regulating valve, and is led to the cooler through a second regulating valve.

[0014] On the other hand, an embodiment of the present invention further provides a ship power system, including: a booster pump and a heating boiler, and also includes the above-mentioned condensate pressurization and deoxygenation integrated device based on ship exhaust steam, and the condensate outlet of the heat trap is connected to the booster pump and the heating boiler in sequence.

[0015] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0016] The integrated condensate pressurization and deoxygenation device based on ship exhaust steam and the ship power system provided by the embodiments of the present invention integrate the condensate pressurization device and the heating and deoxygenation device in a heat well, and the steam turbine drive device fully utilizes the residual energy of the exhaust steam output by the steam-using equipment on the ship to provide driving force for the condensate pressurization device. On the one hand, by converting the thermal energy of the exhaust steam into mechanical energy to drive the condensate pressurization device in the heat well to operate, the condensate in the heat well is output from its condensate outlet at a preset pressure, which effectively solves the problem of cavitation of the booster pump due to insufficient inlet pressure under the ship's shaking condition, and greatly improves the freedom of layout of the booster pump relative to the heat well in the narrow ship space; on the other hand, the exhaust steam generated by the steam turbine drive device during operation can also be used to pass into the heating and deoxygenation device to heat and deoxygenate the condensate in the heat well.

[0017] It can be seen that the present invention is based on the reuse of the surplus energy of exhaust steam. While pressurizing and outputting the condensed water in the heat trap and heating and deoxygenating it, it realizes the integration of the device layout structure, reduces the demand for the use of the internal space of the ship, and improves the environmental adaptability and economic efficiency of the ship's power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the cooler, heat sink and pressure pump arrangement in the prior art;

[0020] Figure 2 It is a structural schematic diagram of a condensate pressurization and deoxygenation integrated device based on ship exhaust steam shown in an embodiment of the present invention;

[0021] Figure 3 It is a structural schematic diagram of a ship power system based on a condensate boosting and deoxygenation integrated device for ship exhaust steam shown in an embodiment of the present invention.

[0022] In the figure, 1. cooler; 2. heat sink; 21. condensate outlet; 3. steam turbine drive device; 31. exhaust steam chamber; 32. exhaust steam turbine; 4. condensate booster device; 41. booster impeller; 42. condensate flow channel; 5. heating and deoxidation device; 6. rotating shaft; 7. exhaust steam main pipe; 8. first exhaust steam branch pipe; 9. second exhaust steam branch pipe; 10. first regulating valve; 11. second regulating valve; 12. booster pump; 13. heating boiler. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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 part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 2 The present embodiment provides an integrated condensate pressurization and deoxidation device based on ship exhaust steam, comprising: a heat sink 2, a steam turbine drive device 3, a condensate pressurization device 4 and a heating deoxidation device 5; the steam turbine drive device 3 drives and connects the condensate pressurization device 4, and the condensate pressurization device 4 and the heating deoxidation device 5 are arranged in the heat sink 2; the steam turbine drive device 3 is used to drive the condensate pressurization device 4 to operate based on the exhaust steam introduced, so that the condensed water in the heat sink 2 is output from the condensate outlet 21 of the heat sink 2 at a preset pressure; the exhaust steam output by the steam turbine drive device 3 is used to be introduced into the heating deoxidation device 5.

[0026] Specifically, Figure 2 As shown, a cooler 1 is usually provided in the power system of a ship, and a heat sink 2 is provided at the lower side of the cooler 1, so that cooling water generated by condensation of the cooler 1 is naturally collected in the heat sink 2 at the lower side under the action of its own weight.

[0027] For the scheme shown in this embodiment, the condensate boosting device 4 and the heating and deoxidizing device 5 are integrated in the heat well 2, and the steam turbine driving device 3 uses the residual energy of the exhaust steam output by the steam-using equipment on the ship to provide driving force for the condensate boosting device 4. On the one hand, by converting the thermal energy of the exhaust steam into mechanical energy to drive the condensate boosting device 4 in the heat well 2 to operate, the condensate in the heat well 2 is output from its condensate outlet 21 at a preset pressure, which effectively solves the problem of cavitation of the boosting pump 12 due to insufficient inlet pressure under the ship's shaking condition, that is, it ensures that the inlet of the boosting pump 12 can maintain above its preset pressure under any working condition, thereby greatly improving the degree of freedom of the boosting pump 12 in the narrow ship space. On the other hand, the exhaust steam generated by the steam turbine driving device 3 during operation can also be used to pass into the heating and deoxidizing device 5 to heat and deoxidize the condensate in the heat well 2, thereby achieving full utilization of the residual energy of the exhaust steam.

[0028] It can be seen that the present invention is based on the reuse of the surplus energy of the exhaust steam. While boosting and outputting the condensed water in the heat trap 2 and heating and deoxygenating it, it realizes the integration of the device layout structure, reduces the demand for the use of the internal space of the ship, and improves the environmental adaptability and economic efficiency of the ship's power system.

[0029] It should be pointed out that the steam turbine drive device 3 is similar to the steam turbine known in the art in terms of working principle. It can be understood as a corresponding device for converting the residual heat energy of the exhaust steam into mechanical energy and transmitting it to the condensate booster device 4. The steam turbine drive device 3 can include a turbine or steam turbine for power output in structure, which is not specifically limited here. At the same time, the condensate booster device 4 can be understood as a rotating drive mechanism capable of boosting the condensate output from the heat well 2, such as: a booster impeller known in the art, and when the condensate booster device 4 adopts a booster impeller, the steam turbine drive device 3 and the booster impeller can be coaxially connected through the rotating shaft 6; the condensate booster device 4 can also be understood as a push plate mechanism capable of providing driving force for the condensate output from the heat well 2, such as: multiple push plates can be installed on a circulating transmission belt, and it is sufficient to only connect the output end of the steam turbine drive device 3 to the transmission belt drive. Of course, the condensate booster device 4 can also be set to other structural forms, which are not listed here one by one.

[0030] At the same time, during the operation of the steam turbine drive device 3, the amount of exhaust steam discharged from the steam turbine drive device 3 to the heating and deoxygenation device 5 can be controlled by the first regulating valve 10, and the condensed water in the heat trap 2 can be heated and deoxygenated by the heating and deoxygenation device 5; and the steam turbine drive device 3 can also control the amount of exhaust steam leading to the cooler 1 through the second regulating valve 11 accordingly.

[0031] Specifically, in Figure 2 and Figure 3In the structure shown, the exhaust steam outlet of the steam turbine drive device 3 is connected to one end of the exhaust steam main pipe 7, and the exhaust steam main pipe 7 is respectively connected to one end of the first exhaust steam branch pipe 8 and the second exhaust steam branch pipe 9 through a three-way valve. A first regulating valve 10 is installed on the first exhaust steam branch pipe 8, and the other end of the first exhaust steam branch pipe 8 is connected to the heating and deoxidation device 5. Correspondingly, a second regulating valve 11 is installed on the second exhaust steam branch pipe 9, and the other end of the second exhaust steam branch pipe 9 is connected to the cooler 1.

[0032] In order to simplify the control, the water pressure outputted from the condensate outlet 21 of the heat trap 2 can be monitored in real time by a pressure sensor. When the water pressure of the condensate is insufficient, the exhaust steam flow rate introduced into the exhaust steam inlet of the steam turbine drive device 3 can be controlled to increase. At the same time, the water temperature of the condensate in the heat trap 2 can also be monitored in real time by a temperature sensor. When the water temperature exceeds a preset temperature threshold, the opening of the first regulating valve 10 can be controlled to be reduced accordingly to reduce the amount of exhaust steam introduced into the heating and deoxygenating device 5, and the opening of the second regulating valve 11 can be controlled to be increased to increase the amount of exhaust steam introduced into the cooler 1 accordingly, wherein both the first regulating valve 10 and the second regulating valve 11 can be electromagnetic valves.

[0033] In one preferred embodiment, Figure 2 and Figure 3 As shown, a steam turbine drive device 3 can be provided to be coaxially connected to a condensate booster device 4, the steam turbine drive device 3 is provided on the outer wall of the heat well 2, the condensate booster device 4 and the heating and deoxidation device 5 are provided at the bottom of the heat well 2, and the output end of the condensate booster device 4 is connected to the condensate outlet 21.

[0034] Specifically, the steam turbine drive device 3 includes an exhaust steam chamber 31 and an exhaust steam turbine 32. The exhaust steam chamber 31 is installed on the outer wall of the heat well 2. The exhaust steam turbine 32 is rotatably installed in the exhaust steam chamber 31. The exhaust steam inlet and the exhaust steam outlet are provided on the side wall of the exhaust steam chamber 31. The condensate booster device 4 includes a booster impeller 41 and a condensate flow channel 42. The output end of the exhaust steam turbine 32 is connected to one end of the rotating shaft 6. The other end of the rotating shaft 6 extends into the heat well 2 and is coaxially connected to the booster impeller 41. The booster impeller 41 is placed In the condensate flow channel 42, the input end of the condensate flow channel 42 is used to drain the condensate in the heat sink 2, and the output end of the condensate flow channel 42 is connected to the condensate outlet 21, wherein the condensate flow channel 42 can be a straight pipe or a curved pipe, which is not specifically limited here. As long as it is convenient for the exhaust steam turbine 32 to provide rotational drive for the boost impeller 41 through the rotating shaft 6, and it is convenient to drain the condensate in the heat sink 2 to its condensate outlet 21, the corresponding structure meets the design requirements.

[0035] Therefore, when exhaust steam is introduced into the exhaust steam chamber 31 through the exhaust steam inlet, the exhaust steam turbine 32 will rotate under the action of the exhaust steam, and drive the booster impeller 41 arranged coaxially therewith to rotate synchronously. The rotation of the booster impeller 41 will pressurize the condensed water drained in the condensate flow channel 42, and ensure that the condensed water is output from the condensate outlet 21 of the heat sink 2 at a water pressure exceeding the preset water pressure, thereby reducing the energy consumption of the ship's power system and solving the problem of cavitation caused by insufficient pressure at the inlet end of the booster pump 12 under the ship's shaking condition, thereby improving the booster efficiency. The pump 12 is arranged freely relative to the heat sink 2, and the adaptability of the ship's power system to the environment is enhanced; at the same time, the exhaust steam that is not effectively utilized in the exhaust steam chamber 31 will be discharged in the form of exhaust steam at its exhaust steam outlet, part of which can be directed to the heating and deoxygenation device 5 to heat and deoxygenate the condensed water in the heat sink 2, and the other part of the exhaust steam can also be transported to the cooler 1 and condensed to form condensed water, thereby achieving efficient utilization of the exhaust steam while improving the economy of the ship's power system operation and realizing the overall integration of the device structure.

[0036] In another preferred embodiment, in order to enhance the heating and deoxygenation effects of exhaust steam on condensed water in the heat well 2, the heating and deoxygenation device 5 can be set as an aeration pipe, which is arranged in a coil shape at the bottom of the heat well 2, and a plurality of aeration micropores are provided on the side wall of the aeration pipe, wherein the heating and deoxygenation device 5 can be adaptively arranged in multiple groups according to the structure of the bottom of the heat well 2, and each group of heating and deoxygenation devices 5 can adopt aeration pipes arranged in a serpentine or meander shape, which is not specifically limited here.

[0037] Preferably, if Figure 3 As shown, this embodiment also provides a ship power system, including: a booster pump 12 and a heating boiler 13, and also includes the condensate pressurization and deoxygenation integrated device based on ship exhaust steam as described above. In actual use, the condensate outlet 21 of the heat trap 2 can be connected to the booster pump 12 and the heating boiler 13 in sequence through a pipeline, and the newly generated steam in the heating boiler 13 can be used as the power drive of the ship.

[0038] Specifically, the ship power system shown in this embodiment adopts the condensate boosting and deoxygenation integrated device based on ship exhaust steam shown in the above embodiment, thereby fully utilizing the residual energy of the exhaust steam, effectively reducing the demand of the condensate boosting system for the internal space of the ship, and improving the environmental adaptability and economic efficiency of the ship power system.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A condensate pressurization and deoxidation integrated device based on ship exhaust steam, including a heat sink, characterized in that: Also includes: Steam turbine drive device, condensate booster device and heating and deoxidation device; The steam turbine driving device is drivingly connected to the condensate boosting device, and the condensate boosting device and the heating and deoxidation device are arranged in the heat well; The steam turbine driving device is used to drive the condensate boosting device to operate based on the exhaust steam introduced, so that the condensate in the heat sink is output from its condensate outlet at a preset pressure; the exhaust steam output by the steam turbine driving device is used to be introduced into the heating deoxidation device; The exhaust steam output by the steam turbine drive device is also used to be passed into the cooler, and the condensed water generated by the cooler is passed into the heat well; the steam turbine drive device is coaxially connected to the condensate booster device, the steam turbine drive device is arranged on the outer side wall of the heat well, the condensate booster device and the heating and deoxidation device are arranged at the bottom of the heat well, and the output end of the condensate booster device is connected to the condensate outlet; The steam turbine drive device comprises an exhaust steam chamber and an exhaust steam turbine, the exhaust steam turbine is rotatably installed in the exhaust steam chamber, and an exhaust steam inlet and an exhaust steam outlet are arranged on the side wall of the exhaust steam chamber; the condensate boosting device comprises a boosting impeller and a condensate flow channel, the output end of the exhaust steam turbine is coaxially connected to the boosting impeller, the boosting impeller is placed in the condensate flow channel, the input end of the condensate flow channel is used to drain the condensate in the heat sink, and the output end of the condensate flow channel is connected to the condensate outlet; The exhaust steam outputted by the steam turbine driving device is led to the heating and deoxidizing device through a first regulating valve, and is led to the cooler through a second regulating valve.

2. The integrated device for condensate pressurization and deoxygenation based on ship exhaust steam according to claim 1 is characterized in that: The heating and deoxygenating device comprises an aeration pipe, which is arranged in a coil shape at the bottom of the heat well, and a plurality of aeration micropores are provided on the side wall of the aeration pipe.

3. A ship power system, comprising: The booster pump and heating boiler are characterized in that they also include an integrated condensate pressurization and deoxygenation device based on ship exhaust steam as described in any one of claims 1 to 2, and the condensate outlet of the heat trap is connected to the booster pump and the heating boiler in sequence.

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