flash tank

Abstract

The application discloses a kind of flash tank, belong to waste heat utilization technical field, to improve the steam production of flush slag water in flash tank, the flash tank includes tank body (1), the upper portion of tank body (1) is provided with liquid inlet (11), tank body (1) contains containing cavity (12) inside, containing cavity (12) contains flash component (2), flash component (2) contains water spray tray (21), the upper surface of water spray tray (21) is conical surface, the top end of the conical surface is upwards, the bottom end is downwards, liquid inlet (11) and the top end of water spray tray (21) are vertically opposite, and there is spacing between the side wall of tank body (1) and water spray tray (21).The upper surface of the water spray tray in the flash tank is conical surface, can make the residence time of flush slag water in flash chamber longer, improve the steam production of flush slag water flash.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste heat utilization, in particular to a flash tank. BACKGROUND

[0002] With the gradual deepening of the research work of the steel enterprise waste heat utilization, the blast furnace slag flushing water flash heating has become a commonly used slag flushing water heating technology. The high temperature slag flushing water is flashed into steam in the flash tank, and then is changed into condensed water by heat exchange with the heating water in the heating water heat exchanger and is collected at the bottom of the heat exchanger, and then the condensed water is pumped out by a water pump to ensure that the whole circulation process can continue. The main part of the slag flushing water flash heating system is the slag flushing water flash tank, and how to make the slag flushing water produce as much steam as possible in the flash tank is the core step to improve the heat exchange efficiency, which plays a decisive role in optimizing the energy saving effect of the slag flushing water flash heating technology. SUMMARY

[0003] In order to improve the steam production of the slag flushing water in the flash tank, the present application provides a flash tank, the upper surface of the water showering plate in the flash tank is a conical surface, which can make the residence time of the slag flushing water in the flash chamber longer, and improve the steam production of the slag flushing water flash.

[0004] The technical scheme adopted by the present application to solve its technical problems is:

[0005] A flash tank, comprising a tank body, a liquid inlet is arranged at the upper part of the tank body, the tank body contains a containing cavity, the containing cavity contains a flash assembly, the flash assembly contains a water showering plate, the upper surface of the water showering plate is a conical surface, the top end of the conical surface faces upward and the bottom end faces downward, the liquid inlet and the top end of the water showering plate are vertically opposite, and there is a spacing between the side wall of the tank body and the water showering plate.

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

[0007] 1. The use of the water showering plate can make the slag flushing water form a uniform flash water film, and the water showering plate is not used as a heat transfer element, so even if the surface of the water showering plate is covered with dirt, it will not affect the flash process of the slag flushing water.

[0008] 2. Compared with the traditional flash tank using the dripping method, the use of the water showering plate can make the residence time of the slag flushing water in the flash chamber longer, and improve the steam production of the flash.

[0009] 3. The steam of the flash tank is introduced in stages, and the heating is stepped, which can improve the waste heat utilization rate of the slag flushing water flash steam. BRIEF DESCRIPTION OF DRAWINGS

[0010] The drawings accompanying the specification of this application form a part of it, serve to provide further understanding of the present application, and together with the specification explain the present application, and do not constitute an improper limitation of the present application.

[0011] Figure 1 Fig. 1 is a front view of a schematic diagram of a flash tank according to the present application.

[0012] Figure 2 Fig. 2 is a top view of a schematic diagram of a shower tray according to the present application.

[0013] Figure 3 Fig. 3 is a top view of a schematic diagram of a water guide tray according to the present application.

[0014] Figure 4 Fig. 4 is a top view of a schematic diagram of a shower tray according to the present application.

[0015] Figure 5 Fig. 5 is a top view of a schematic diagram of a water guide tray according to the present application.

[0016] BRIEF DESCRIPTION OF DRAWINGS

[0017] 1, tank body; 2, flash assembly; 3, steam header;

[0018] 11, liquid inlet; 12, containing cavity; 13, exhaust outlet; 14, liquid outlet;

[0019] 21, shower tray; 22, first radial flow channel; 23, water guide tray; 24, second radial flow channel; 25, water collecting tray; 26, water collecting cavity; 27, flash cavity; 28, first reverse Tesla valve flow channel; 29, second reverse Tesla valve flow channel;

[0020] 31, air inlet branch pipe; 32, valve;

[0021] 221, first baffle;

[0022] 241, second baffle. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] For the convenience of understanding and description, absolute positional relationships are used in the following description of the present application, and without special instructions, the positional word "up" represents the upward direction in the drawings, the positional word "down" represents the downward direction in the drawings, the positional word "left" represents the left direction in the drawings, the positional word "right" represents the right direction in the drawings, the positional word "front" represents the direction perpendicular to the paper surface of the drawings and pointing to the inside of the paper surface, and the positional word "back" represents the direction perpendicular to the paper surface of the drawings and pointing to the outside of the paper surface. Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 ​​​​​The orientation of the paper is directed towards the outer edge of the paper. This invention is described from the perspective of a reader or user, but the aforementioned directional terms should not be construed as limiting the scope of protection of this invention. Regarding the dimensions and angles of the components, those skilled in the art can determine them specifically based on actual needs or a limited number of experiments.

[0025] Example 1

[0026] like Figure 1 As shown in the embodiment of the present invention, a flash evaporator includes a tank body 1, a liquid inlet 11 at the upper part of the tank body 1, a receiving cavity 12 inside the tank body 1, a flash evaporation component 2 inside the receiving cavity 12, and a water spraying plate 21 in the flash evaporation component 2. The upper surface of the water spraying plate 21 is a conical surface with the top end facing upward and the bottom end facing downward. The top end of the liquid inlet 11 and the top end of the water spraying plate 21 are directly opposite each other, and there is a gap between the side wall of the tank body 1 and the water spraying plate 21.

[0027] Tank 1 is an upright cylindrical structure with its axis extending vertically. The upper surface of the water-spraying plate 21 is conical, and the taper of the conical surface can be obtained through a limited number of experiments. The water-spraying plate 21 has an umbrella-shaped structure, with its top facing upwards and its bottom facing downwards. The axis of tank 1 and the axis of water-spraying plate 21 coincide. The upper surface of water-spraying plate 21 can be smooth, so that even if the surface of water-spraying plate 21 is covered with dirt, it will not affect the flash evaporation process of the slag flushing water.

[0028] Or, such as Figure 2 As shown, in order to increase the residence time of the flushing water on the upper surface of the water distribution plate 21, multiple first radial flow channels 22 can be provided on the upper surface of the water distribution plate 21. The multiple first radial flow channels 22 are arranged at intervals along the circumference of the water distribution plate 21 and extend radially along the water distribution plate 21. Multiple first baffles 221 are provided in the first radial flow channels 22. The multiple first baffles 221 are arranged at intervals along the radial direction of the water distribution plate 21 and are alternately connected to both sides of the first radial flow channels 22 (along the circumference of the water distribution plate 21).

[0029] The flash evaporation assembly 2 also includes a water guide plate 23, a water spray plate 21, and a water guide plate 23, which are arranged at intervals. The water guide plate 23 is roughly a ring structure (or it can also be called a frustum-shaped cylindrical structure). The upper surface of the water guide plate 23 is a frustum-shaped cylindrical surface (such as a truncated cone cylindrical surface). The top end of the frustum-shaped cylindrical surface is facing down and the bottom end is facing up. The taper of the frustum-shaped cylindrical surface can be obtained through a limited number of experiments. The water guide plate 23 is a truncated cone cylindrical structure. The top end of the water guide plate 23 is facing down and the bottom end is facing up. The water guide plate 23 enables the water discharged from the water spray plate 21 to continue to flow downward and gather towards the center.

[0030] The upper surface of the water guide plate 23 can be a smooth surface. For example... Figure 3As shown, in order to improve the residence time of the slag flushing water on the upper surface of the water guide disc 23, the upper surface of the water guide disc 23 can also be provided with a plurality of second radial flow channels 24, which are arranged in a circumferential direction of the water guide disc 23 and extend in a radial direction of the water guide disc 23. A plurality of second baffles 241 are arranged in the second radial flow channels 24, which are arranged in a radial direction of the water guide disc 23 and are alternately connected to both sides of the second radial flow channels 24 (in the circumferential direction of the water guide disc 23).

[0031] As shown in the drawings, Figure 1 The top end of the water guide disc 23 can be directly matched and sealed with the side wall of the tank body 1, or the top end of the water guide disc 23 can also be connected with the side wall of the tank body 1 through a water collecting disc 25. The water collecting disc 25 is a flat annular structure, and the axes of the tank body 1, the water guide disc 23 and the water collecting disc 25 coincide. In one flash assembly 2, there is a distance between the water collecting disc 25 and the water shower disc 21, the inner diameter of the water collecting disc 25 is equal to the diameter of the bottom end of the water shower disc 21, the outer edge of the water collecting disc 25 is matched and sealed with the side wall of the tank body 1, and the inner edge of the water collecting disc 25 is matched and sealed with the bottom end of the water guide disc 23. The inner diameter of the water guide disc 23 is 10%-30% of the inner diameter of the side wall of the tank body 1.

[0032] As shown in the drawings, Figure 1 In order to further improve the steam production of the slag flushing water in the flash tank and fully flash the high slag flushing water in the flash tank, a plurality of flash assemblies 2 are arranged in the containing cavity 12 in the up-down direction. It can be understood that the flash tank contains a multi-stage flash structure or adopts a multi-stage flash structure. The steam of the flash tank is introduced in stages and heated in stages, which can improve the waste heat utilization rate of the flash steam of the slag flushing water.

[0033] The containing cavity 12 is divided into a water collecting cavity 26 and a plurality of flash cavities 27 by the flash assembly 2. The plurality of flash cavities 27 are arranged in the up-down direction, and the flash cavities 27 are connected one by one in the up-down direction with the flash assembly 2. A plurality of exhaust outlets 13 are arranged on the side wall of the tank body 1, and the exhaust outlets 13 are connected one by one with the flash cavities 27. The water collecting cavity 26 is located at the lower end of the containing cavity 12, and the lower part of the tank body 1 is provided with a liquid outlet 14, which is connected with the water collecting cavity 26.

[0034] As shown in the drawings, Figure 1 The flash tank can also include a steam header 3, which is located outside the tank body 1 and is arranged left and right with the tank body 1. The steam header 3 is a vertical cylindrical structure, and a plurality of air inlet branch pipes 31 are connected with the steam header 3. The exhaust outlet 13 and the air inlet branch pipe 31 are connected one by one, and a valve 32 can be arranged on each air inlet branch pipe 31.

[0035] The working process of the flash tank is introduced as follows.

[0036] For example, the flash tank contains a four-stage flash structure, and the first-stage flash structure, the second-stage flash structure, the third-stage flash structure and the fourth-stage flash structure are sequentially connected from top to bottom and each contains a flash cavity 27, a water shower tray 21, a water guide tray 23 and a water collecting tray 25.

[0037] In the first-stage flash structure, the slag flushing water enters the tank body 1 from the liquid inlet 11, first falls on the upper surface of the water shower tray 21 and continues to flow downward, and the slag flushing water on the upper surface of the water shower tray 21 is flashed, and the flashed steam enters the flash cavity 27. Due to the action of gravity, the slag flushing water flowing out of the upper surface of the water shower tray 21 flows into the water collecting tray 25 through the space between the water shower tray 21 and the water collecting tray 25, the slag flushing water in the water collecting tray 25 flows into the upper surface of the water guide tray 23, the slag flushing water on the upper surface of the water guide tray 23 is flashed, and the flashed steam also enters the flash cavity 27, and the slag flushing water on the upper surface of the water guide tray 23 flows out from the lower end of the water guide tray 23.

[0038] In the second-stage flash structure, the slag flushing water flowing out of the water guide tray 23 of the first-stage flash structure falls on the upper surface of the water shower tray 21 and continues to flow downward, and the slag flushing water on the upper surface of the water shower tray 21 is flashed, and the flashed steam enters the flash cavity 27. Due to the action of gravity, the slag flushing water flowing out of the upper surface of the water shower tray 21 flows into the water collecting tray 25 through the space between the water shower tray 21 and the water collecting tray 25, the slag flushing water in the water collecting tray 25 flows into the upper surface of the water guide tray 23, the slag flushing water on the upper surface of the water guide tray 23 is flashed, and the flashed steam also enters the flash cavity 27, and the slag flushing water on the upper surface of the water guide tray 23 flows out from the lower end of the water guide tray 23.

[0039] In the third-stage flash structure, the slag flushing water flowing out of the water guide tray 23 of the second-stage flash structure falls on the upper surface of the water shower tray 21 and continues to flow downward, and the slag flushing water on the upper surface of the water shower tray 21 is flashed, and the flashed steam enters the flash cavity 27. Due to the action of gravity, the slag flushing water flowing out of the upper surface of the water shower tray 21 flows into the water collecting tray 25 through the space between the water shower tray 21 and the water collecting tray 25, the slag flushing water in the water collecting tray 25 flows into the upper surface of the water guide tray 23, the slag flushing water on the upper surface of the water guide tray 23 is flashed, and the flashed steam also enters the flash cavity 27, and the slag flushing water on the upper surface of the water guide tray 23 flows out from the lower end of the water guide tray 23.

[0040] In the fourth stage flash structure, the slag flushing water flowed out of the water guide tray 23 of the third stage flash structure is sprinkled on the upper surface of the water sprinkling tray 21 and continues to flow downward, the slag flushing water is flashed on the upper surface of the water sprinkling tray 21, the flashed steam enters the flash cavity 27, due to the effect of gravity, the slag flushing water flowed out of the upper surface of the water sprinkling tray 21 flows into the water collecting tray 25 through the spacing between the water sprinkling tray 21 and the water collecting tray 25, the slag flushing water in the water collecting tray 25 flows into the upper surface of the water guide tray 23, the slag flushing water is flashed on the upper surface of the water guide tray 23, the flashed steam also enters the flash cavity 27, and the slag flushing water on the upper surface of the water guide tray 23 flows out from the lower end of the water guide tray 23.

[0041] The slag flushing water flowed out of the water guide tray 23 of the fourth stage flash structure enters the water collecting cavity 26, the slag flushing water collected in the water collecting cavity 26 can be discharged through the liquid outlet 14, the steam in the flash cavity 27 enters the steam header 3 through the steam inlet branch pipe 31, the steam header 3 contains a steam outlet, which can be located at the upper end of the steam header 3, and the steam in the steam header 3 can be discharged through the steam outlet.

[0042] Example 2

[0043] This embodiment is a change of Example 1, the main difference between this embodiment and Example 1 is that:

[0044] As shown in Figure 4 , the upper surface of the water sprinkling tray 21 is provided with a plurality of first reverse Tesla valve flow channels 28, the plurality of first reverse Tesla valve flow channels 28 are arranged in a spaced manner along the circumferential direction of the water sprinkling tray 21, the first reverse Tesla valve flow channels 28 extend along the radial direction of the water sprinkling tray 21, the inlet end of the first reverse Tesla valve flow channels 28 is located at the top of the water sprinkling tray 21, and the outlet end of the first reverse Tesla valve flow channels 28 is located at the bottom of the water sprinkling tray 21.

[0045] As shown in Figure 5 , the upper surface of the water guide tray 23 is provided with a plurality of second reverse Tesla valve flow channels 29, the plurality of second reverse Tesla valve flow channels 29 are arranged in a spaced manner along the circumferential direction of the water guide tray 23, the second reverse Tesla valve flow channels 29 extend along the radial direction of the water guide tray 23, the inlet end of the second reverse Tesla valve flow channels 29 is located at the bottom of the water guide tray 23, and the outlet end of the second reverse Tesla valve flow channels 29 is located at the top of the water guide tray 23; in one flash assembly 2, the projections of the first reverse Tesla valve flow channels 28 and the second reverse Tesla valve flow channels 29 on the horizontal plane are arranged alternately along the circumferential direction of the water sprinkling tray 21.

[0046] The first reverse Tesla valve flow channel 28 and the second reverse Tesla valve flow channel 29 are both reverse Tesla valve structures, in which the fluid encounters greater resistance and collides with each other during the flow from the inlet end to the outlet end, so that the steam production in the flash tank can be further improved.

[0047] Other technical features in the embodiment can be the same as those in the embodiment 1, and for the sake of brevity, the embodiment will not be described in detail.

[0048] The above description is only a specific embodiment of the present application, which cannot limit the scope of the application, so the replacement of equivalent components or equivalent changes and modifications made within the protection scope of the present application should still belong to the scope of the present application. In addition, the technical features in the present application can be freely combined with each other, and the technical features can be freely combined with the technical solutions, and the technical solutions can be freely combined with each other.

Claims

1. A flash tank characterized in that, The flash tank 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 containing cavity (12), the containing cavity (12) contains a flash assembly (2), the flash assembly (2) contains a water tray (21), the upper surface of the water tray (21) is a conical surface, the top end of the conical surface faces upward and the bottom end faces downward, the liquid inlet (11) and the top end of the water tray (21) are vertically opposite, and there is a spacing between the side wall of the tank body (1) and the water tray (21); The upper surface of the water tray (21) is provided with a plurality of first radial flow channels (22), the plurality of first radial flow channels (22) are arranged in a spaced manner along the circumference of the water tray (21), and the first radial flow channels (22) extend along the radial direction of the water tray (21); A plurality of first baffles (221) are arranged in the first radial flow channels (22) in a spaced manner along the radial direction of the water tray (21), and the plurality of first baffles (221) are alternately connected to the two sides of the first radial flow channels (22).

2. The flash tank of claim 1, wherein, The flash assembly (2) further comprises a water guide tray (23), the water tray (21) and the water guide tray (23) are arranged in a spaced manner, the water guide tray (23) has an annular structure, the upper surface of the water guide tray (23) is a frustum conical surface, the top end of the frustum conical surface faces downward and the bottom end faces upward, and the water guide tray (23) can make the water discharged from the water tray (21) continue to flow downward.

3. The flash tank of claim 2, wherein, The upper surface of the water guide tray (23) is provided with a plurality of second radial flow channels (24), the plurality of second radial flow channels (24) are arranged in a spaced manner along the circumference of the water guide tray (23), and the second radial flow channels (24) extend along the radial direction of the water guide tray (23).

4. The flash tank of claim 3, wherein, A plurality of second baffles (241) are arranged in the second radial flow channels (24) in a spaced manner along the radial direction of the water guide tray (23), and the plurality of second baffles (241) are alternately connected to the two sides of the second radial flow channels (24).

5. The flash tank of claim 2, wherein, The top end of the water guide tray (23) is connected to the side wall of the tank body (1) through a water collecting tray (25), the water collecting tray (25) has an annular structure, and the inner diameter of the water collecting tray (25) is equal to the diameter of the bottom end of the water tray (21).

6. The flash tank of claim 2, wherein, The containing cavity (12) contains a plurality of flash assemblies (2), the plurality of flash assemblies (2) are arranged in a spaced manner along the vertical direction, the containing cavity (12) is divided into a water collecting cavity (26) and a plurality of flash cavities (27) by the flash assemblies (2), the flash cavities (27) are connected to the flash assemblies (2) in a one-to-one correspondence along the vertical direction, a plurality of exhaust outlets (13) are arranged on the side wall of the tank body (1), the exhaust outlets (13) are connected to the flash cavities (27) in a one-to-one correspondence, and a liquid outlet (14) is arranged on the lower part of the tank body (1) and is connected to the water collecting cavity (26).

7. The flash tank of claim 6, wherein, The upper surface of the water shower tray (21) is provided with a plurality of first reverse Tesla valve flow channels (28), the plurality of first reverse Tesla valve flow channels (28) are arranged in intervals along the circumference of the water shower tray (21), the first reverse Tesla valve flow channels (28) extend along the radial direction of the water shower tray (21), the inlet end of the first reverse Tesla valve flow channels (28) is located at the top of the water shower tray (21), and the outlet end of the first reverse Tesla valve flow channels (28) is located at the bottom of the water shower tray (21).

8. The flash tank of claim 7, wherein, The upper surface of the water guide tray (23) is provided with a plurality of second reverse Tesla valve flow channels (29), the plurality of second reverse Tesla valve flow channels (29) are arranged in intervals along the circumference of the water guide tray (23), the second reverse Tesla valve flow channels (29) extend along the radial direction of the water guide tray (23), the inlet end of the second reverse Tesla valve flow channels (29) is located at the bottom of the water guide tray (23), and the outlet end of the second reverse Tesla valve flow channels (29) is located at the top of the water guide tray (23); in one flash assembly (2), the projections of the first reverse Tesla valve flow channels (28) and the second reverse Tesla valve flow channels (29) on the horizontal plane are arranged in alternation along the circumference of the water shower tray (21).

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