Heat recovery cone kettle steam turbine

Abstract

The heat recovery cone-pot steam turbine comprises an annular spray pipe and a cone-pot steam turbine which are in relative running fit, the cone-pot steam turbine comprises a cone-pot shell, steam turbine blades and a transmission shaft which are connected, the transmission shaft is provided with a generator connecting end, and a fluid outlet is formed in the bottom of the cone-pot shell; a low-temperature high-pressure steam inlet and a nozzle are arranged on the annular spray pipe, and an outlet of the nozzle faces the steam turbine blade; a cold cap is arranged above the steam turbine blades, and a cold core is arranged in an inner cavity of the lower portion of the conical kettle steam turbine. According to the heat recovery cone-pot steam turbine, low-temperature and high-pressure steam energy can be converted into mechanical energy, and meanwhile steam waste heat energy is recycled and reused in a heat exchange mode.

Description

Technical Field

[0001] This invention relates to the field of steam transmission, and more particularly to a heat recovery cone turbine. Background Technology

[0002] Boiling one liter of water at room temperature and pressure requires approximately 0.12 kWh, while vaporization under boiling conditions requires 0.60 kWh. Adding the energy consumption of cooling equipment (if available), producing one liter of water with existing equipment typically requires around 0.8 kWh, which is very energy-intensive. The reasons are as follows:

[0003] 1) Without a heat recovery system, all used heat energy is wasted.

[0004] 2) Additional cooling equipment (if available) is required and consumes energy.

[0005] It is evident that significantly reducing the energy consumption of a distilled water system requires a highly efficient heat recovery still and a thermal energy recycling system. However, existing stills lack heat recovery capabilities, resulting in significant heat loss and failing to meet energy conservation and environmental protection goals. Furthermore, the heat recovery still requires the generated steam to drive a heat recovery turbine. However, traditional turbines can only convert the kinetic energy of the steam into the mechanical energy of the turbine drive shaft, failing to recover and reuse the waste heat from the steam, thus resulting in a low proportion of total energy converted into mechanical energy. Summary of the Invention

[0006] The purpose of this invention is to provide a heat recovery cone turbine that can solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention provides a heat recovery cone turbine, comprising an annular nozzle and a cone turbine that are rotatably coupled. The cone turbine includes a cone shell, turbine blades, and a drive shaft connected to each other. The drive shaft is provided with a generator connection end, and the bottom of the cone shell is provided with a fluid outlet. The annular nozzle is provided with a low-temperature high-pressure steam inlet and a nozzle, and the outlet of the nozzle faces the turbine blades. A cold cap is provided above the turbine blades, and a cold core is provided in the lower inner cavity of the cone turbine.

[0008] Furthermore, the conical kettle shell includes an upper inverted cone and a lower inverted cone, which are connected by a waist channel; the inner wall of the waist channel is connected to the drive shaft by a guide fan blade, and the inner wall of the upper inverted cone shell is connected to the drive shaft by a swirl-reducing rib; the fluid outlet is located at the bottom of the lower inverted cone, and a swirl-reducing wing plate is provided on the lower inner wall of the lower inverted cone; the turbine blade is located at the top of the upper inverted cone.

[0009] Furthermore, the top of the upper inverted cone is provided with an upper cover plate and a lower sealing plate, and the edges of the upper cover plate and the lower sealing plate are connected by an arc sealing plate. The turbine blades are connected to the outside of the arc sealing plate, and both the lower sealing plate and the upper cover plate are connected to the drive shaft. There are at least two turbine blades, and the tops of each turbine blade are connected by the same arc rib.

[0010] Furthermore, the annular nozzle also includes an annular pipe, and the low-temperature high-pressure steam inlet, the annular pipe and the nozzle are connected in sequence. The outlet direction of the nozzle is at an angle to the rotation radius of the turbine blades. An insulation shell is provided on the outside of the annular pipe.

[0011] Furthermore, the cold cap includes a cold cap shell, with a hole in the middle through which the drive shaft passes; an airflow channel is formed in the inner cavity of the cold cap shell by a number of airflow guide plates connected thereto; the cold cap shell is provided with a first air inlet and a first air outlet respectively connected to the two ends of the airflow channel; the airflow channel is located above the turbine blades, and the side wall of the cold cap shell is provided with a notch for avoiding the nozzle.

[0012] Furthermore, the cold core includes a coil support, with a support base connected to the bottom of the coil support. A heat exchange coil is installed on the coil support, with a second gas inlet and a second gas outlet at both ends of the heat exchange coil. The coil support and the heat exchange coil are located in the lower inverted cone of the conical shell.

[0013] Furthermore, the outer wall of the cone-shaped kettle shell is provided with a cone-shaped kettle insulation shell.

[0014] Beneficial effects

[0015] Compared with the prior art, the advantages of the heat recovery cone turbine of the present invention are:

[0016] 1. Low-temperature, high-pressure steam enters the annular nozzle and is ejected through the nozzle, driving the turbine blades to rotate. This, in turn, drives the generator to produce electricity via the drive shaft. The steam cools and forms condensate, which is discharged from the fluid outlet at the bottom of the cone-shaped turbine casing. This heat recovery cone turbine can convert the energy of low-temperature, high-pressure steam into mechanical energy, while simultaneously recovering and reusing the waste heat energy of the steam through heat exchange.

[0017] 2. After the low-temperature, high-pressure steam enters the conical kettle shell, it moves towards the center of the kettle along the turbine blades and falls into the kettle under the guidance of the guide fan blades. The cooled steam becomes condensate + steam, rotating at high speed downwards in the kettle while converging towards the central axis. Most of the remaining potential energy of the condensate and steam is absorbed by the kettle body, mainly by anti-spin ribs, and converted into mechanical energy, which is ultimately converted into electrical energy generated by the generator, further improving energy recovery efficiency.

[0018] 3. Condensate and steam fall into the lower chamber of the conical kettle. The energy of the steam is recovered by the cold cap into the heat recovery system. Finally, the low-temperature, high-pressure steam is converted into low-energy cold air and condensate, which are discharged from the fluid outlet at the bottom of the kettle and can be treated into drinking water. Part of the residual heat of the condensate and steam is absorbed by the cold core. The cold core sends the lower-temperature, high-pressure gas flow into the pressure tank of the distillation pressure furnace and cools the high-temperature steam in the distillation pressure furnace to form low-temperature, high-pressure steam. This low-temperature, high-pressure steam then enters the annular nozzle from the low-temperature, high-pressure steam inlet for reuse.

[0019] 4. The ring nozzle has multiple nozzles, which allows the turbine blades to be subjected to more even force.

[0020] 5. The function of the guide fan blades is to prevent steam from overflowing from the top of the kettle and to control the direction of airflow.

[0021] 6. The outer wall of the cone kettle is equipped with a cone kettle insulation shell to prevent energy leakage as much as possible.

[0022] 7. The purpose of the rotor blades is to collect the remaining potential energy of the condensate.

[0023] The invention will become clearer from the following description, taken in conjunction with the accompanying drawings, which are used to explain embodiments of the invention. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view of a heat recovery cone turbine.

[0026] Figure 2 This is a top view of a heat recovery cone turbine.

[0027] Figure 3 for Figure 2 1-1 view;

[0028] Figure 4 for Figure 3 2-2 view;

[0029] Figure 5 This is a front view of a cone turbine.

[0030] Figure 6 This is a top view of a cone turbine.

[0031] Figure 7 This is a front sectional view of a cone turbine.

[0032] Figure 8 for Figure 7 3-3 view;

[0033] Figure 9 for Figure 7 4-4 view;

[0034] Figure 10 for Figure 7 5-5 view;

[0035] Figure 11 This is a top view of the beanie;

[0036] Figure 12 This is the front view of the beanie;

[0037] Figure 13 This is a horizontal cross-sectional view of the airflow channel of the cold cap;

[0038] Figure 14 This is a vertical sectional view of the cold hat;

[0039] Figure 15 This is a top view of the cold core;

[0040] Figure 16 This is a top view of the annular nozzle. Detailed Implementation

[0041] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0042] Example

[0043] Specific embodiments of the present invention are as follows: Figures 1 to 16 As shown, a heat recovery cone turbine 2 includes an annular nozzle 21 and a cone turbine 23 that are rotatably coupled to each other. The cone turbine 23 is vertically arranged. The cone turbine 23 includes a cone shell 231, turbine blades 233, and a drive shaft 232 connected together, forming a single unit. The drive shaft 232 is vertically arranged. The upper end of the drive shaft 232 is a generator connection end, and the bottom of the cone shell 231 has a fluid outlet 2310. The annular nozzle 21 has a low-temperature, high-pressure steam inlet 211 and multiple nozzles 213, with the outlets of the nozzles 213 facing the turbine blades 233. A cold cap 22 is provided above the turbine blades 233, and a cold core 24 is provided in the lower inner cavity of the cone turbine 23. The outer wall of the cone shell 231 is provided with a cone insulation shell 230.

[0044] The conical kettle shell 231 includes an upper inverted cone and a lower inverted cone, with the lower end cross-sectional dimension of the upper inverted cone being smaller than the upper end cross-sectional dimension of the lower inverted cone. The lower end of the upper inverted cone and the upper end of the lower inverted cone are connected by a waist channel 2312. The inner wall of the waist channel 2312 is connected to the drive shaft 232 by at least two guide vanes 239, and the inner wall of the upper inverted cone of the conical kettle shell 231 is connected to the drive shaft 232 by six anti-spin ribs 238. The fluid outlet 2310 is located at the bottom of the lower inverted cone, and six anti-spin ribs 2311 are provided on the lower inner wall of the lower inverted cone. The turbine blades 233 are multiple and located at the top of the upper inverted cone.

[0045] The top of the inverted cone is provided with an upper cover plate 235 and a lower sealing plate 236, both of which are circular. The edges of the upper cover plate 235 and the lower sealing plate 236 are connected by an arc-shaped sealing plate 237. Each turbine blade 233 is connected to the outside of the arc-shaped sealing plate 237. The middle of both the lower sealing plate 236 and the upper cover plate 235 are connected to the drive shaft 232. There are at least two turbine blades 233, and the tops of each turbine blade 233 are connected by the same arc-shaped rib plate 234.

[0046] The annular nozzle 21 also includes an annular pipe 212. The low-temperature high-pressure steam inlet 211, the annular pipe 212, and the nozzle 213 are connected in sequence. The outlet direction of the nozzle 213 forms an angle with the rotation radius of the turbine blade 233. An insulating shell is provided on the outer side of the annular pipe 212. The outer edge of the turbine blade 233 is provided with an indented notch to avoid interference between the nozzle 213 and the nozzle 213.

[0047] The cold cap 22 and the annular nozzle 21 are fixed in position relative to each other. The cold cap 22 includes a cold cap shell 221, with a hole 222 in the middle of the cold cap shell 221 through which the drive shaft 232 passes. An airflow channel 226 is formed in the inner cavity of the cold cap shell 221 by several airflow guide plates 225 connected thereto. The cold cap shell 221 has a first air inlet 223 and a first air outlet 224 that are respectively connected to both ends of the airflow channel 226. The airflow channel 226 is located above the turbine blade 233, and a notch 227 is provided on the side wall of the cold cap shell 221 to avoid the nozzle 213.

[0048] The cold core 24 includes a coil support 242, with a support base 243 connected to its bottom. A heat exchange coil 241 is mounted on the coil support 242, with a second gas inlet 244 and a second gas outlet 245 at its two ends. The coil support 242 and the heat exchange coil 241 are located within the lower inverted cone of the conical shell 231. The support base 243 of the cold core 24 extends downward from the fluid outlet 2310 to below the conical shell 231, and the cold core 24 does not rotate with the conical turbine 23. A water collection tank 25 for collecting condensate is provided below the fluid outlet 2310.

[0049] The cold air flow direction of the cold cap and cold core is set according to the principle of cooling first and then heating. The first air inlet 223 and the first air outlet 224 of the cold cap 22 and the second gas inlet 244 of the cold core 24 are all connected to the heat circulation recovery system. The second gas outlet 245 of the cold core 24 is connected to the pressure tank of the distillation pressure furnace used to heat seawater to generate steam. The high-pressure airflow ejected from the second gas outlet 245 is used to cool the high-temperature steam in the pressure tank to form low-temperature high-pressure steam. This low-temperature high-pressure steam then enters the annular nozzle 21 from the low-temperature high-pressure steam inlet 211.

[0050] During operation, low-temperature, high-pressure steam enters the annular nozzle 21 and is ejected through the nozzle 213, driving the turbine blades 233 to rotate. After entering the conical kettle shell 231, the low-temperature, high-pressure steam moves along the turbine blades 233 towards the kettle center and falls into the kettle under the guidance of the guide fan blades 239. The cooled steam becomes condensate + steam, rotating rapidly downwards within the kettle while converging towards the central axis. Most of the remaining potential energy of the condensate and steam is absorbed by the kettle body, primarily by the anti-spin ribs 238, and converted into mechanical energy, ultimately transforming into electrical energy generated by the generator.

[0051] Based on the principle of conservation of energy:

[0052] Q 出 =Q 高 -Q 排 -Q 温 -Q w

[0053] Q 出 —Net output of mechanical energy;

[0054] Q 高 —Input low-temperature, high-pressure steam energy;

[0055] Q 排 —Residual energy from air and condensate should be reduced to less than 1%;

[0056] Q 温 —The recovered waste heat energy generally accounts for a certain percentage of Q. 高 Around 25%;

[0057] Q w —Minor energy losses such as water vapor splashing, temperature reduction, wind resistance, and bearing friction are controlled to within 1%.

[0058] From the above formula, it can be seen that Q 温 Based on a 90% recovery rate, it is feasible to achieve an energy loss rate of less than 5% for the "heat recovery cone turbine".

[0059] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A heat recovery cone turbine, characterized in that, The device includes a ring nozzle (21) and a cone turbine (23) that rotate relative to each other. The cone turbine (23) includes a cone shell (231), turbine blades (233), and a drive shaft (232) connected to each other. The drive shaft (232) is provided with a generator connection end. The bottom of the cone shell (231) is provided with a fluid outlet (2310). The ring nozzle (21) is provided with a low-temperature high-pressure steam inlet (211) and a nozzle (213). The outlet of the nozzle (213) faces the turbine blades (233). A cold cap (22) is provided above the turbine blades (233). A cold core (24) is provided in the lower inner cavity of the cone turbine (23).

2. The heat recovery cone turbine according to claim 1, characterized in that, The conical kettle shell (231) includes an upper inverted cone and a lower inverted cone, which are connected by a waist channel (2312). The inner wall of the waist channel (2312) is connected to the drive shaft (232) by a guide fan blade (239). The inner wall of the upper inverted cone of the conical kettle shell (231) is connected to the drive shaft (232) by a swirl-reducing rib (238). The fluid outlet (2310) is located at the bottom of the lower inverted cone, and a swirl-reducing wing plate (2311) is provided on the lower inner wall of the lower inverted cone. The turbine blade (233) is located at the top of the upper inverted cone.

3. A heat recovery cone turbine according to claim 2, characterized in that, The top of the upper inverted cone is provided with an upper cover plate (235) and a lower sealing plate (236). The edges of the upper cover plate (235) and the lower sealing plate (236) are connected by an arc sealing plate (237). The turbine blade (233) is connected to the outside of the arc sealing plate (237). Both the lower sealing plate (236) and the upper cover plate (235) are connected to the drive shaft (232). There are at least two turbine blades (233), and the top of each turbine blade (233) is connected by the same arc rib plate (234).

4. A heat recovery cone turbine according to claim 1, characterized in that, The annular nozzle (21) also includes an annular pipe (212). The low-temperature high-pressure steam inlet (211), the annular pipe (212) and the nozzle (213) are connected in sequence. The outlet direction of the nozzle (213) is at an angle to the rotation radius of the turbine blade (233). The annular pipe (212) is provided with a heat-insulating shell on the outside.

5. A heat recovery cone turbine according to claim 1, characterized in that, The cold cap (22) includes a cold cap shell (221), with a hole (222) in the middle of the cold cap shell (221), through which the drive shaft (232) passes; the inner cavity of the cold cap shell (221) is formed by several airflow guide plates (225) connected thereto to form an airflow channel (226), and the cold cap shell (221) is provided with a first air inlet (223) and a first air outlet (224) respectively connected to both ends of the airflow channel (226); the airflow channel (226) is located above the turbine blade (233), and the side wall of the cold cap shell (221) is provided with a notch (227) for avoiding the nozzle (213).

6. A heat recovery cone turbine according to claim 2, characterized in that, The cold core (24) includes a coil support (242), the bottom of which is connected to a support base (243). A heat exchange coil (241) is installed on the coil support (242), and the two ends of the heat exchange coil (241) are a second gas inlet (244) and a second gas outlet (245), respectively. The coil support (242) and the heat exchange coil (241) are located in the lower inverted cone of the conical shell (231).

7. A heat recovery cone turbine according to claim 1, characterized in that, The outer wall of the cone-shaped outer shell (231) is provided with a cone-shaped heat insulation shell (230).

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