A hydrophobic flash tank for vapor recovery

Abstract

The utility model belongs to the technical field of water drain expansion vessel, especially relates to a water drain expansion vessel for steam recovery. Its technical scheme is: a water drain expansion vessel for steam recovery, including the casing, be connected with the water drain inlet pipe, steam exhaust pipe and overflow pipe respectively on the casing, still install the sprinkler device and separating device in the casing, separating device is located the sprinkler device upside, and the sprinkler device is passed into desalted water, and separating device includes a plurality of corrugated sheets. The utility model provides a water drain expansion vessel for steam recovery.

Description

Technical Field

[0001] This utility model belongs to the field of hydrophobic expansion vessel technology, and specifically relates to a hydrophobic expansion vessel for steam recovery. Background Technology

[0002] Efficient regulation is the core objective of the next generation of coal-fired power plant upgrades; therefore, supercritical and ultra-supercritical units have become the current mainstay. As a key piece of equipment in the unit, the boiler must possess high efficiency and flexibility, while safety and reliability are fundamental prerequisites. The start-up system of a supercritical boiler is typically equipped with a condensate expansion tank. High-temperature, high-pressure boiler condensate is discharged into the expansion tank for expansion and flash evaporation, and the generated steam is released to the atmosphere. The condensate, after passing inspection, is recycled back to the condensate system. Releasing steam into the atmosphere results in heat loss, and for power plants located in northern regions, the discharged steam can freeze at the exhaust pipe outlet in winter, posing a significant safety hazard.

[0003] The steam generated by the flash evaporation of the hydrophobic expansion vessel is discharged into the atmosphere through the exhaust pipe at the top. On the one hand, this results in the waste of heat. On the other hand, many power plants in the north have reported that the steam discharged in winter freezes on the furnace top, which not only makes furnace top maintenance difficult, but also poses a risk of ice blocks falling. Utility Model Content

[0004] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a hydrophobic expansion tank for steam recovery.

[0005] The technical solution adopted in this utility model is as follows: A hydrophobic expansion tank for steam recovery includes a shell, on which a hydrophobic inlet pipe, a steam exhaust pipe and an overflow pipe are respectively connected. A spray device and a separation device are also installed inside the shell. The separation device is located above the spray device. Demineralized water is introduced into the spray device. The separation device includes several corrugated plates.

[0006] This utility model discloses a hydrophobic expansion tank, comprising a spraying device and a separation device, which can recover a large proportion of the exhaust steam from the hydrophobic expansion tank. The spraying device fully covers the rising steam section with well-atomized demineralized water droplets, ensuring sufficient steam-water contact. The separation device contacts the steam that continues to rise after spraying. Due to the angle between the steam and the corrugated plate, the rising steam is blocked to a maximum extent, promoting steam condensation and reducing steam discharge.

[0007] As a preferred embodiment of the present invention, the spraying device includes two mutually perpendicular spray water pipes, which are connected at their intersection. The spray water pipes are fixed inside the housing, and a number of spray points are provided on the spray water pipes. Nozzles are connected to the spray points of the spray water pipes.

[0008] The spray water uses demineralized water from the power plant, which is piped to the spray water inlet of the expansion tank. The spray water is then piped to each spray point. Each spray point is equipped with a nozzle, which allows for full coverage of the shell cross-section, increasing the contact probability between the demineralized water and steam, and improving the steam recovery effect.

[0009] As a preferred embodiment of this utility model, a first spray point is provided at the intersection of the two spray water pipes. A second and third spray point are provided on both sides of the intersection of one of the spray water pipes, and a fourth and fifth spray point are provided on both sides of the intersection of the other spray water pipe. The five spray points are distributed dispersedly, reducing overlap in coverage area, ensuring full coverage of the casing cross-section while minimizing the need for nozzles.

[0010] In a preferred embodiment of this invention, the nozzle includes a pipe connector, a threaded head, and a nozzle body. The pipe connector is connected to the lower side of the spray water pipeline, and the pipe connector and the nozzle body are respectively threaded to both ends of the threaded head. The nozzle body is connected to the pipe connector via the threaded head, facilitating quick assembly and disassembly of the nozzle body.

[0011] As a preferred embodiment of this utility model, the nozzle body has a spray coverage angle of 120°. The nozzle body is a solid structure, atomizing the de-icing and cooling demineralized water, reducing the diameter of the demineralized water droplets, increasing the heat exchange contact area, and enhancing the heat exchange effect. With a single solid nozzle having a coverage angle of 120°, all nozzle bodies can fully cover the cross-section of the hydrophobic expansion container, ensuring sufficient steam-water contact heat exchange.

[0012] As a preferred embodiment of this utility model, one end of one of the spray water pipes is connected to a spray water inlet, which is located on the outer wall of the housing.

[0013] As a preferred embodiment of this utility model, the number of waveform plates is three, namely a middle waveform plate and two end waveform plates respectively fixed on both sides of the middle waveform plate. The middle waveform plate is arranged horizontally and the end waveform plates are arranged at an angle.

[0014] In a preferred embodiment of this invention, the angle between the end corrugated plate and the middle corrugated plate is 20°. The combination of the three corrugated plates can significantly reduce steam leakage.

[0015] In a preferred embodiment of this invention, a side rib for positioning the side of the end corrugated plate and a bottom rib for supporting the bottom of the end corrugated plate are fixed inside the housing. The separation device is fixed inside the housing of the hydrophobic expansion container by the side rib and the bottom rib.

[0016] As a preferred embodiment of this utility model, the shell includes a cylindrical body, a lower end cap connected to the bottom of the cylindrical body, and an upper end cap connected to the top of the cylindrical body. The vent pipe is connected to the top of the upper end cap, the overflow pipe is connected to the bottom of the lower end cap, the condensate inlet pipe is connected to the middle of the cylindrical body, and the spraying device and the separation device are arranged on the upper part of the cylindrical body.

[0017] The beneficial effects of this utility model are as follows: This utility model discloses a hydrophobic expansion tank, comprising a spraying device and a separation device, which can recover a large proportion of the exhaust steam from the hydrophobic expansion tank. The spraying device fully covers the rising steam section with well-atomized demineralized water droplets, ensuring sufficient steam-water contact. The separation device contacts the steam that continues to rise after spraying. Due to the angle between the steam and the corrugated plate, the rising steam is blocked to a maximum extent, promoting steam condensation and reducing steam discharge. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the spray system. Figure 3 This is a schematic diagram of the nozzle structure; Figure 4 This is a schematic diagram of the separation device.

[0019] In the diagram: 1-Shell; 2-Spraying device; 3-Separation device; 4-Nozzle; 11-Drainage inlet pipe; 12-Steam exhaust pipe; 13-Overflow pipe; 14-Side rib; 15-Bottom rib; 16-Cylinder; 17-Lower end; 18-Upper end; 21-Spray water pipeline; 22-Spray water inlet; 31-Intermediate corrugated plate; 32-End corrugated plate; 41-Pipe connector; 42-Threaded head; 43-Nozzle body; a-First spray point; b-Second spray point; c-Third spray point; d-Fourth spray point; e-Fifth spray point. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other.

[0022] like Figure 1 As shown, the hydrophobic expansion tank for steam recovery in this embodiment includes a shell 1. A hydrophobic inlet pipe 11, a steam exhaust pipe 12, and an overflow pipe 13 are respectively connected to the shell 1. A spray device 2 and a separation device 3 are also installed inside the shell 1. The separation device 3 is located above the spray device 2. Demineralized water is introduced into the spray device 2. The separation device 3 includes several corrugated plates.

[0023] The shell 1 includes a cylindrical body 16, a lower end cap 17 connected to the bottom of the cylindrical body 16, and an upper end cap 18 connected to the top of the cylindrical body 16. A steam exhaust pipe 12 is connected to the top of the upper end cap 18, an overflow pipe 13 is connected to the bottom of the lower end cap 17, a condensate inlet pipe 11 is connected to the middle of the cylindrical body 16, and a spray device 2 and a separation device 3 are disposed on the upper part of the cylindrical body 16.

[0024] Normally, after the condensate enters the condensate expansion tank, it undergoes flash evaporation. The generated steam is discharged into the atmosphere through the vent pipe 12, while the water enters the condensate tank through the overflow pipe 13. To prevent or reduce steam discharge from the top, a spray device 2 is installed above the condensate expansion tank. The steam directly contacts the demineralized water and condenses into water, which then enters the condensate tank through the lower overflow pipe 13. After contacting the sprayed water, the uncondensed steam continues to rise and is further condensed by the separation device 3 located above the spray device 2, ultimately separating out a small amount of steam for discharge.

[0025] This utility model's hydrophobic expansion tank includes a spray device 2 and a separation device 3, enabling a high proportion of steam recovery from the exhaust steam. The spray device 2 fully covers the rising steam section with well-atomized demineralized water droplets, ensuring sufficient steam-water contact. The separation device 3 adopts a "bird-wing" design, contacting the steam that rises further after spraying. Due to the angle between the steam and the corrugated plate, it maximally blocks the rising steam, promoting steam condensation and reducing steam discharge.

[0026] Specifically, such as Figure 2 As shown, the spraying device 2 includes two mutually perpendicular spray water pipes 21, which are connected at the intersection. The spray water pipes 21 are fixed inside the housing 1, and several spray points are provided on the spray water pipes 21. Nozzles 4 are connected to the spray points of the spray water pipes 21.

[0027] The spray water uses demineralized water from the power plant, which is piped to the spray water inlet 22 of the expansion tank. The spray water is then led to each spray point through spray water pipe 21. Each spray point is connected to a nozzle 4, which can fully cover the cross-section of the shell 1, increasing the contact probability between the demineralized water and steam, and improving the steam recovery effect.

[0028] The first spray point a is located at the intersection of the two spray water pipes 21. A second spray point b and a third spray point c are located on either side of the intersection of one of the spray water pipes 21, and a fourth spray point d and a fifth spray point e are located on either side of the intersection of the other spray water pipe 21. The five spray points are distributed dispersedly to reduce overlapping coverage areas, ensuring full coverage of the casing 1 cross-section while minimizing the use of nozzles 4.

[0029] Specifically, such as Figure 3 As shown, the nozzle 4 includes a pipe connector 41, a threaded head 42, and a nozzle body 43. The pipe connector 41 is connected to the lower side of the spray water pipe 21, and the pipe connector 41 and the nozzle body 43 are respectively threaded to both ends of the threaded head 42. The nozzle body 43 is connected to the pipe connector 41 through the threaded head 42, which facilitates quick assembly and disassembly of the nozzle body 43.

[0030] The nozzle body 43 has a spray coverage angle of 120°. The nozzle body 43 is a solid structure, atomizing de-icing and demineralizing water, reducing the diameter of the demineralized water droplets, increasing the heat exchange contact area, and enhancing the heat exchange effect. Each solid nozzle 4 has a coverage angle of 120°, and all nozzle bodies 43 can fully cover the cross-section of the hydrophobic expansion container, ensuring sufficient steam-water contact heat exchange.

[0031] One end of one of the spray water pipes 21 is connected to a spray water inlet 22, which is located on the outer wall of the housing 1.

[0032] Specifically, such as Figure 4 As shown, there are three waveform plates: a middle waveform plate 31 and two end waveform plates 32 fixed on both sides of the middle waveform plate 31. The middle waveform plate 31 is arranged horizontally, and the end waveform plates 32 are arranged at an angle.

[0033] The angle between the end corrugated plate 32 and the middle corrugated plate 31 is 20°. By combining the three corrugated plates, a large proportion of steam can be blocked from escaping.

[0034] The housing 1 is fixed with side ribs 14 for positioning the side of the end corrugated plate 32 and bottom ribs 15 for supporting the bottom of the end corrugated plate 32. The separation device 3 is fixed inside the housing 1 of the hydrophobic expansion container by the side ribs 14 and the bottom ribs 15.

[0035] This utility model is not limited to the above-mentioned optional embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that falls within the scope of the claims of this utility model shall be protected by this utility model.

Claims

1. A hydrophobic expansion tank for steam recovery, characterized in that: Includes a shell (1), on which a condensate inlet pipe (11), a steam exhaust pipe (12) and an overflow pipe (13) are respectively connected. A spray device (2) and a separation device (3) are also installed inside the shell (1). The separation device (3) is located on the upper side of the spray device (2). The spray device (2) is supplied with demineralized water. The separation device (3) includes several corrugated plates.

2. The hydrophobic expansion tank for steam recovery according to claim 1, characterized in that: The spraying device (2) includes two mutually perpendicular spray water pipes (21), which are connected at the intersection. The spray water pipes (21) are fixed inside the housing (1), and several spray points are provided on the spray water pipes (21). The spray points of the spray water pipes (21) are connected to nozzles (4).

3. A hydrophobic expansion tank for steam recovery according to claim 2, characterized in that: A first spray point (a) is provided at the intersection of two spray water pipes (21), a second spray point (b) and a third spray point (c) are provided on both sides of the intersection of one spray water pipe (21), and a fourth spray point (d) and a fifth spray point (e) are provided on both sides of the intersection of the other spray water pipe (21).

4. A hydrophobic expansion tank for steam recovery according to claim 2, characterized in that: The nozzle (4) includes a pipe connector (41), a threaded head (42) and a nozzle body (43). The pipe connector (41) is connected to the lower side of the spray water pipe (21), and the pipe connector (41) and the nozzle body (43) are respectively threaded to the two ends of the threaded head (42).

5. A hydrophobic expansion tank for steam recovery according to claim 4, characterized in that: The nozzle body (43) has a spray coverage angle of 120°.

6. A hydrophobic expansion tank for steam recovery according to claim 2, characterized in that: One end of one of the spray water pipes (21) is connected to a spray water inlet (22), which is located on the outer wall of the housing (1).

7. A hydrophobic expansion tank for steam recovery according to claim 1, characterized in that: The number of the waveform plates is three. The three waveform plates are a middle waveform plate (31) and two end waveform plates (32) fixed on both sides of the middle waveform plate (31). The middle waveform plate (31) is arranged horizontally and the end waveform plates (32) are arranged at an angle.

8. A hydrophobic expansion tank for steam recovery according to claim 7, characterized in that: The angle between the end waveform plate (32) and the middle waveform plate (31) is 20°.

9. A hydrophobic expansion tank for steam recovery according to claim 7, characterized in that: The housing (1) is fixed with a side rib (14) for positioning the side of the end corrugated plate (32) and a bottom rib (15) for supporting the bottom of the end corrugated plate (32).

10. A hydrophobic expansion tank for steam recovery according to any one of claims 1 to 9, characterized in that: The shell (1) includes a cylinder (16) and a lower end cap (17) connected to the bottom of the cylinder (16) and an upper end cap (18) connected to the top of the cylinder (16). A steam exhaust pipe (12) is connected to the top of the upper end cap (18), an overflow pipe (13) is connected to the bottom of the lower end cap (17), a water inlet pipe (11) is connected to the middle of the cylinder (16), and a spray device (2) and a separation device (3) are located on the upper part of the cylinder (16).

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