Flash tank with spiral flow channel

Abstract

The invention discloses a flash tank containing a spiral flow channel, belongs to the technical field of waste heat utilization, and aims at improving the steam yield of slag flushing water in the flash tank. The flash tank containing the spiral flow channel comprises a tank body (1), a liquid inlet (11) is formed in the upper portion of the tank body (1), a containing cavity (12) is formed in the tank body (1), and a spiral flow channel assembly (2) is arranged in the containing cavity (12); the spiral flow channel assembly (2) comprises a spiral flow channel disc (21), and a spiral flow channel (22) is arranged on the upper surface of the spiral flow channel disc (21). According to the flash tank containing the spiral flow channel, the spiral flow channel can enable slag flushing water to stay in the flash chamber for a longer time, and the steam yield of flash evaporation of the slag flushing water is increased.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat utilization, in particular to a flash tank with a spiral flow channel. Background Art

[0002] With the gradual deepening of research on waste heat utilization in steel enterprises, flash heating of blast furnace slag water has become a commonly used slag water heating technology. The high-temperature slag water flashes into steam in the flash tank, and then changes into condensed water after heat exchange with heating water in the heating water heat exchanger and collects at the bottom of the heat exchanger. The condensed water is then pumped out by a pump to ensure that the entire cycle can continue. The main component of the slag water flash heating system is the slag water flash tank. How to make the slag water produce as much steam as possible in the flash tank is the core step to improve the heat exchange efficiency, and plays a decisive role in optimizing the energy-saving effect of the slag water flash heating technology. Summary of the invention

[0003] In order to increase the steam production of slag flushing water in a flash tank, the present invention provides a flash tank containing a spiral flow channel. The spiral flow channel in the flash tank containing the spiral flow channel can make the slag flushing water stay in the flash chamber for a longer time, thereby increasing the steam production of the slag flushing water flash evaporation.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A flash tank containing a spiral flow channel comprises a tank body, a liquid inlet is arranged on the upper part of the tank body, a containing cavity is contained in the tank body, a spiral flow channel assembly is contained in the containing cavity, the spiral flow channel assembly comprises a spiral flow channel disk, the upper surface of the spiral flow channel disk is a conical surface, the top end of the conical surface faces upward and the bottom end faces downward, and the upper surface of the spiral flow channel disk is provided with a spiral flow channel.

[0006] The beneficial effects of the present invention are:

[0007] 1. The use of a water distribution plate can make the slag flushing water more evenly distributed in each spiral flow channel.

[0008] 2. The use of spiral flow channels can make the slag flushing water stay in the flash chamber for a longer time, thereby increasing the steam production of the flash chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0010] Figure 1 It is a schematic diagram of the main view of the flash tank containing the spiral flow channel according to the present invention.

[0011] Figure 2 It is a top view schematic diagram of the water distribution plate.

[0012] Description of the reference numerals:

[0013] 1. Tank body; 2. Spiral flow channel assembly; 3. Water delivery component; 4. Steam header;

[0014] 11. Liquid inlet; 12. Accommodating cavity; 13. Exhaust outlet; 14. Liquid outlet;

[0015] 21. Spiral flow channel disk; 22. Spiral flow channel; 23. Water distribution disk; 24. Water collection disk; 25. Flash evaporation cavity; 26. Water collection cavity;

[0016] 41. Intake branch pipe; 42. Valve;

[0017] 231. Water outlet. Detailed implementation manners

[0018] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0019] For the convenience of understanding and description, the following description of the present invention adopts an absolute positional relationship. Unless otherwise specified, the orientation word "upper" represents Figure 1 the upper side direction in Figure 1 the lower side direction in Figure 1 the left side direction in Figure 1 the right side direction in Figure 1 the "front" represents the direction perpendicular to Figure 1 the paper surface of

[0020] As Figure 1 shown, a flash evaporation tank containing a spiral flow channel according to an embodiment of the present invention includes a tank body 1. A liquid inlet 11 is provided at the upper part of the tank body 1. An accommodating cavity 12 is contained in the tank body 1. A spiral flow channel assembly 2 is contained in the accommodating cavity 12. The spiral flow channel assembly 2 includes a spiral flow channel disk 21. The spiral flow channel disk 21 is located directly below the liquid inlet 11. The upper surface of the spiral flow channel disk 21 is a conical surface, with the top of the conical surface facing upward and the bottom facing downward. A spiral flow channel 22 is provided on the upper surface of the spiral flow channel disk 21. The use of the spiral flow channel 22 can make the residence time of the slag flushing water in the flash evaporation tank longer, and improve the steam production of flash evaporation.

[0021] The tank body 1 is an upright cylindrical structure, the axis of the tank body 1 extends in the up-down direction, the spiral flow channel disc 21 is a conical cylindrical structure, and the axis of the tank body 1 coincides with the axis of the spiral flow channel disc 21. The upper surface of the spiral flow channel disc 21 may be provided with a plurality of spiral flow channels 22, the upper surface of the spiral flow channel disc 21 is similar to a multi-start thread, the spiral flow channels 22 extend along the circumference of the spiral flow channel disc 21, the inlet end of the spiral flow channel 22 is located at the upper part of the upper surface of the spiral flow channel disc 21, and the outlet end of the spiral flow channel 22 is located at the lower part of the upper surface of the spiral flow channel disc 21.

[0022] like Figure 1 and Figure 2 As shown, the spiral flow channel assembly 2 further includes a water separation plate 23, which is located at the top of the spiral flow channel plate 21, and the liquid inlet 11 and the water separation plate 23 are vertically opposite to each other, and the fluid discharged from the liquid inlet 11 can fall into the water separation plate 23. The axis of the water separation plate 23 coincides with the axis of the tank body 1, and a plurality of water outlets 231 are arranged at the lower part of the water separation plate 23, and the water outlets 231 correspond to the spiral flow channel 22 one by one, and the fluid discharged from the water outlets 231 of the water separation plate 23 can fall into the spiral flow channel 22.

[0023] For example, the upper surface of the spiral flow channel plate 21 may be provided with two spiral flow channels 22, the spiral flow channels 22 extend along the circumference of the spiral flow channel plate 21, and the spiral flow channels 22 also extend from top to bottom, the water separation plate 23 includes a side peripheral wall and a bottom wall connected and fixed up and down, and the water outlet 231 is located at the lower end of the side peripheral wall or on the bottom wall. The width, rise angle and other parameters of the spiral flow channel 22 can be obtained through limited use.

[0024] The water-dividing plate 23 contains a water-containing cavity. In order to distribute the slag water more evenly in each spiral flow channel 22, a spiral blade may be provided in the water-containing cavity. The structure of the spiral blade may be the same as that of an existing fan blade. The fluid discharged from the liquid inlet 11 may fall into the water-dividing plate 23 to rotate the spiral blade. At this time, the spiral blade may not be connected to a power output device. Alternatively, the spiral blade may be connected to a power output device, and the power output device may rotate the spiral blade.

[0025] The spiral flow channel assembly 2 also includes a water collecting pan 24, which is an annular structure and is sleeved outside the lower end of the spiral flow channel pan 21. The axis of the water collecting pan 24 coincides with the axis of the tank body 1, and the fluid discharged from the spiral flow channel pan 21 can enter the water collecting pan 24. The inner edge of the water collecting pan 24 is matched and sealed with the lower end of the spiral flow channel pan 21, and the outer edge of the water collecting pan 24 is matched and sealed with the inner surface of the side wall of the tank body 1.

[0026] like Figure 1As shown, the accommodating cavity 12 contains a plurality of spiral flow channel assemblies 2, which are arranged at intervals in the up-down direction, and a water delivery component 3 is provided between two adjacent spiral flow channel assemblies 2. The water delivery component 3 can deliver water in the water collecting tray 24 of the upper spiral flow channel assembly 2 (of the two adjacent spiral flow channel assemblies 2) to the water dividing tray 23 of the lower spiral flow channel assembly 2.

[0027] It can be understood that the flash tank containing the spiral flow channel contains a multi-stage flash structure, each flash structure contains a spiral flow channel component 2, and the slag flushing water flashes in the previous flash structure and then enters the next flash structure to continue flashing. The multi-stage flash structure can further increase the steam production of the flash.

[0028] The water collecting tray 24 is provided with a drain port, and the water conveying component 3 may be a water conveying pipe or a water conveying trough. For example, the water conveying component 3 is a water conveying pipe, and the upper end of the water conveying component 3 (between two adjacent spiral flow channel components 2) is connected to the drain port of the water collecting tray 24 of the upper spiral flow channel component 2, and the lower end of the water conveying component 3 is vertically opposite to the water dividing tray 23 of the lower spiral flow channel component 2.

[0029] The accommodating cavity 12 is divided into a water collecting cavity 26 and a plurality of flash evaporation cavities 25 by the spiral flow channel assembly 2. The plurality of flash evaporation cavities 25 are arranged at intervals in the up and down directions. The water collecting cavity 26 is located at the lower end of the accommodating cavity 12. The flash evaporation cavities 25 are connected one-to-one with the spiral flow channel assembly 2 from top to bottom. A plurality of exhaust outlets 13 are provided on the side wall of the tank body 1. The exhaust outlets 13 are connected one-to-one with the flash evaporation cavities 25. A liquid outlet 14 is provided at the lower part of the tank body 1. The liquid outlet 14 is connected with the water collecting cavity 26.

[0030] like Figure 1 As shown, the flash tank containing the spiral flow channel also includes a steam header 4, which is located outside the tank body 1, and the tank body 1 and the steam header 4 are arranged at intervals on the left and right. The steam header 4 is an upright cylindrical structure, and the steam header 4 is connected to a plurality of air intake branch pipes 41, and the exhaust outlet 13 and the air intake branch pipes 41 are connected one by one, and each air intake branch pipe 41 is provided with a valve 42.

[0031] The working process of the flash tank containing the spiral flow channel is described below.

[0032] For example, the flash tank containing the spiral flow channel contains a four-stage flash evaporation structure, which includes a first-stage flash evaporation structure, a second-stage flash evaporation structure, a third-stage flash evaporation structure and a fourth-stage flash evaporation structure from top to bottom. The first-stage flash evaporation structure, the second-stage flash evaporation structure and the third-stage flash evaporation structure all contain a flash evaporation cavity 25, a spiral flow channel component 2 and a water delivery component 3 connected from top to bottom, and the fourth-stage flash evaporation structure only contains a flash evaporation cavity 25 and a spiral flow channel component 2 connected from top to bottom.

[0033] The slag flushing water enters the tank body 1 from the liquid inlet 11, and first falls into the water dividing plate 23 of the first-stage flash evaporation structure. The slag flushing water flows into the spiral flow channel 22 of the first-stage flash evaporation structure through the water dividing plate 23 of the first-stage flash evaporation structure. The slag flushing water mainly flashes in the spiral flow channel 22, and the flashed steam enters the flash cavity 25 of the first-stage flash evaporation structure. Due to the effect of gravity, the slag flushing water in the spiral flow channel 22 of the first-stage flash evaporation structure flows into the water collecting plate 24 of the first-stage flash evaporation structure. The slag flushing water in the water collecting plate 24 of the first-stage flash evaporation structure flows into the water dividing plate 23 of the second-stage flash evaporation structure through the water conveying component 3 of the first-stage flash evaporation structure.

[0034] The slag-flushing water in the water dividing plate 23 of the second-stage flash evaporation structure flows into the spiral flow channel 22 of the second-stage flash evaporation structure, and the slag-flushing water mainly flashes in the spiral flow channel 22, and the flashed steam enters the flash cavity 25 of the second-stage flash evaporation structure. Due to the effect of gravity, the slag-flushing water in the spiral flow channel 22 of the second-stage flash evaporation structure flows into the water collecting plate 24 of the second-stage flash evaporation structure, and the slag-flushing water in the water collecting plate 24 of the second-stage flash evaporation structure flows into the water dividing plate 23 of the third-stage flash evaporation structure through the water conveying component 3 of the second-stage flash evaporation structure.

[0035] The slag-flushing water in the water dividing plate 23 of the third-stage flash evaporation structure flows into the spiral flow channel 22 of the third-stage flash evaporation structure, and the slag-flushing water mainly flashes in the spiral flow channel 22, and the flashed steam enters the flash cavity 25 of the third-stage flash evaporation structure. Due to the effect of gravity, the slag-flushing water in the spiral flow channel 22 of the third-stage flash evaporation structure flows into the water collecting plate 24 of the third-stage flash evaporation structure, and the slag-flushing water in the water collecting plate 24 of the third-stage flash evaporation structure flows into the water dividing plate 23 of the fourth-stage flash evaporation structure through the water conveying component 3 of the third-stage flash evaporation structure.

[0036] The slag-flushing water in the water dividing plate 23 of the fourth-stage flash evaporation structure flows into the spiral flow channel 22 of the fourth-stage flash evaporation structure, and the slag-flushing water mainly flashes in the spiral flow channel 22, and the flashed steam enters the flash cavity 25 of the fourth-stage flash evaporation structure. Due to the effect of gravity, the slag-flushing water in the spiral flow channel 22 of the fourth-stage flash evaporation structure flows into the water collecting plate 24 of the fourth-stage flash evaporation structure, and the slag-flushing water in the water collecting plate 24 of the fourth-stage flash evaporation structure enters the water collecting cavity 26 through the drain port on the water collecting plate 24 and is gathered.

[0037] The slag flushing water collected in the water collecting cavity 26 can be discharged through the liquid outlet 14, and the steam in the flash cavity 25 enters the steam manifold 4 through the air inlet branch pipe 41. The steam manifold 4 has a steam outlet, which can be located at the upper end of the steam manifold 4. The steam in the steam manifold 4 can be discharged through the steam outlet.

[0038] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the present invention should still fall within the scope of the present invention. In addition, the technical features of the present invention can be freely combined with each other, with technical features and technical solutions, and with technical solutions.

Claims

1. A flash tank with a spiral flow channel, characterized in that: The flash tank containing a spiral flow channel comprises a tank body (1), the upper part of the tank body (1) is provided with a liquid inlet (11), the tank body (1) contains a receiving cavity (12), the receiving cavity (12) contains a spiral flow channel assembly (2), the spiral flow channel assembly (2) contains a spiral flow channel disk (21), the upper surface of the spiral flow channel disk (21) is a conical surface, the top end of the conical surface faces upward and the bottom end faces downward, and the upper surface of the spiral flow channel disk (21) is provided with a spiral flow channel (22).

2. The flash tank with spiral flow channel according to claim 1, characterized in that: A plurality of spiral flow channels (22) are arranged on the upper surface of the spiral flow channel disk (21), the spiral flow channels (22) extending along the circumference of the spiral flow channel disk (21), the inlet end of the spiral flow channel (22) being located at the upper part of the upper surface of the spiral flow channel disk (21), and the outlet end of the spiral flow channel (22) being located at the lower part of the upper surface of the spiral flow channel disk (21).

3. The flash tank with spiral flow channel according to claim 2, characterized in that: The spiral flow channel assembly (2) further comprises a water separation plate (23), which is located on the top of the spiral flow channel plate (21). The liquid inlet (11) and the water separation plate (23) are vertically opposite to each other, and the fluid discharged from the liquid inlet (11) can fall into the water separation plate (23).

4. The flash tank with spiral flow channel according to claim 3, characterized in that: A plurality of water outlets (231) are arranged at the lower part of the water separation plate (23), and the water outlets (231) correspond one-to-one to the spiral flow channel (22). The fluid discharged from the water outlets (231) of the water separation plate (23) can fall into the spiral flow channel (22).

5. The flash tank with spiral flow channel according to claim 3, characterized in that: The spiral flow channel assembly (2) further comprises a water collecting tray (24) which is annular in structure and is sleeved outside the lower end of the spiral flow channel tray (21). The fluid discharged from the spiral flow channel tray (21) can enter the water collecting tray (24).

6. The flash tank with spiral flow channel according to claim 5, characterized in that: The accommodating cavity (12) contains a plurality of spiral flow channel components (2), the plurality of spiral flow channel components (2) are arranged at intervals in the up-down direction, and a water conveying component (3) is provided between two adjacent spiral flow channel components (2).

7. The flash tank with spiral flow channel according to claim 6, characterized in that: The water delivery component (3) is capable of delivering water in the water collecting tray (24) of the upper spiral flow channel component (2) to the water dividing tray (23) of the lower spiral flow channel component (2).

8. The flash tank with spiral flow channel according to claim 1, characterized in that: The water delivery component (3) is a water delivery pipe. The upper end of the water delivery component (3) is connected to the water collection tray (24) of the upper spiral flow channel component (2), and the lower end of the water delivery component (3) is vertically opposite to the water distribution tray (23) of the lower spiral flow channel component (2).

9. The flash tank with spiral flow channel according to claim 1, characterized in that: The containing cavity (12) contains a plurality of spiral flow channel assemblies (2), and the containing cavity (12) is divided into a water collecting cavity (26) and a plurality of flash evaporation cavities (25) by the spiral flow channel assemblies (2), and the flash evaporation cavities (25) are connected one by one with the spiral flow channel assemblies (2) from top to bottom. A plurality of exhaust outlets (13) are provided on the side wall of the tank body (1), and the exhaust outlets (13) are connected one by one with the flash evaporation cavities (25). A liquid outlet (14) is provided at the bottom of the tank body (1), and the liquid outlet (14) is connected with the water collecting cavity (26).

10. The flash tank with spiral flow channel according to claim 9, characterized in that: The flash tank containing the spiral flow channel also includes a steam header (4), the steam header (4) is a vertical cylindrical structure, the steam header (4) is connected to a plurality of air intake branch pipes (41), the exhaust outlets (13) and the air intake branch pipes (41) are connected one by one, and each air intake branch pipe (41) is provided with a valve (42).

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