Storage tank spraying and atomizing device

Abstract

The invention provides a spraying and atomizing device for a storage tank. The spraying and atomizing device comprises a liquid suction unit and a liquid level stabilizing unit, the liquid suction unit comprises a liquid storage box, a high-pressure air pipe, a plurality of liquid suction pipes and an injection head; the liquid storage box is used for storing heat transfer liquid, a base is arranged at the bottom in the liquid storage box, the high-pressure air pipe is installed on the base, one end of the high-pressure air pipe is used for being connected with an external air pipe, and the other end of the high-pressure air pipe penetrates out of the bottom of the liquid storage box after penetrating through the base and is provided with the spraying head. One end of the liquid suction pipe extends into the heat transfer liquid, and the other end of the liquid suction pipe firstly extends out of the heat transfer liquid to the position above the liquid level, then extends into the heat transfer liquid, penetrates out of the bottom of the liquid storage box after penetrating through the base and is connected with the spraying head; the liquid level stabilizing unit is used for adjusting the liquid level of the heat transfer liquid in the liquid storage box, so that a suction inlet of the liquid suction pipe extends into the heat transfer liquid all the time, and the highest point of the liquid suction pipe is located above the liquid level of the heat transfer liquid all the time. The liquid distributor has the advantage of stable and uniform liquid distribution.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of solid energy storage technology, and particularly relates to a storage tank spraying and atomizing device. BACKGROUND

[0002] In order to cope with the load regulation of power grid and the intermittency of clean energy such as solar energy in use, long-time energy storage technology has developed rapidly in recent years. Among many energy storage technologies, solid packed bed heat storage has significant cost effectiveness and excellent performance. In the existing single-tank heat storage system with temperature stratification, in order to maintain the stability of the temperature stratification of the solid material in the tank during heat storage and release and improve the heat storage and release efficiency of the solid material, the uniformity of the flow of the liquid heat transfer medium in the solid packing material must be strictly controlled, which puts higher requirements on the liquid distribution device of the storage tank.

[0003] At present, there are few types of spraying liquid distributors for large solid packed bed heat storage tanks. Most of the spraying forms are point spraying, that is, holes are opened at the bottom of the pipeline or disc, and the liquid is sprayed out by hydraulic pressure, but the uniformity of such spraying is relatively poor, and it is difficult to ensure the uniform distribution of liquid in the whole cross section of the tank when dealing with large tanks. If a liquid distribution nozzle is used, the liquid enters the chamber and forms a cyclone through the blades, and breaks at the outlet due to shearing with air. Although surface spraying and liquid distribution can be achieved, the liquid volume at the edge of the liquid distribution range is more due to inertia, and the uniformity is also difficult to guarantee. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a storage tank spraying and atomizing device, which solves the problem of uneven liquid distribution of point spraying and liquid distribution nozzle surface spraying in the prior art.

[0005] The above technical purpose of the present application is realized by the following technical scheme:

[0006] A storage tank spraying and atomizing device comprises a liquid suction unit and a liquid level stabilizing unit. The liquid suction unit comprises a liquid storage box, a high-pressure gas pipe, a plurality of liquid suction pipes and a spraying head. The liquid storage box is used to store heat transfer liquid, and a base is arranged at the bottom of the liquid storage box. The high-pressure gas pipe is installed on the base, one end of the high-pressure gas pipe is used to connect an external gas pipe, and the other end of the high-pressure gas pipe penetrates through the base and then penetrates out of the bottom of the liquid storage box and is installed with the spraying head. One end of the liquid suction pipe penetrates into the heat transfer liquid, and the other end of the liquid suction pipe penetrates into the heat transfer liquid after penetrating out of the heat transfer liquid above the liquid surface and then penetrating through the base and penetrating out of the bottom of the liquid storage box and connecting with the spraying head. The liquid level stabilizing unit is used to adjust the liquid level of the heat transfer liquid in the liquid storage box, so that the suction inlet of the liquid suction pipe always penetrates into the heat transfer liquid, and the highest point of the liquid suction pipe is always above the liquid surface of the heat transfer liquid.

[0007] Further, the inside of the spray head is provided with a spray cavity, the high-pressure air pipe and the liquid suction pipe are communicated with the spray cavity, and the bottom surface of the spray head is provided as a porous bottom plate.

[0008] Further, the liquid level stabilizing unit comprises a partition plate arranged in the liquid storage box, the base passes through the partition plate, the partition plate moves along the outer wall of the base in the vertical direction, the partition plate divides the internal space of the liquid storage box into a liquid storage layer and an adjusting layer, the liquid storage layer is located above the adjusting layer, a plurality of springs are arranged in the adjusting layer, and two ends of each spring are connected with the bottom of the partition plate and the bottom of the liquid storage box respectively; when the volume of the heat transfer liquid in the liquid storage box changes, the springs are deformed to keep the depth of the liquid suction pipe inserted into the heat transfer liquid stable.

[0009] Further, sealing rings are arranged between the partition plate and the outer wall of the base and between the partition plate and the inner wall of the liquid storage box.

[0010] Further, the high-pressure air pipe comprises a cylindrical cavity and a necked cavity with gradually reduced cross section from top to bottom, and the tail end of the necked cavity is connected with the spray head.

[0011] Further, the base is provided with a positioning groove, and the necked cavity of the high-pressure air pipe is fixedly arranged in the positioning groove.

[0012] Further, the liquid storage box is provided in a cylindrical or prismatic shape.

[0013] Further, the liquid suction pipe is provided in a bent structure, and the highest point of the liquid suction pipe is located above the liquid surface of the heat transfer liquid in the liquid storage box.

[0014] Further, the movement direction of the heat transfer liquid sucked into the spray cavity by the liquid suction pipe intersects with the movement direction of the gas sprayed by the high-pressure air pipe in the spray cavity.

[0015] Further, the liquid level sensor for detecting the liquid level of the heat transfer liquid is arranged in the liquid storage box.

[0016] The present application has the following advantages:

[0017] 1. The spray tank spraying and atomizing device provided by the present application can utilize the negative pressure cavity formed when the high-pressure air passes through the small flow channel to suck the heat transfer liquid out of the liquid storage box through the liquid suction pipe, realize the atomization of the heat transfer liquid through the mutual friction and disturbance of the high-pressure air and the heat transfer liquid in the spray cavity, and ensure the uniformity of the heat transfer liquid in the liquid distribution range.

[0018] 2. The heat transfer liquid is pre-flowed into the liquid storage box and sprayed out through the negative pressure atomization formed in the spray cavity, and the outflow and the liquid distribution range are only related to the air pressure, thereby solving the problem of difficult flow distribution control caused by the mutual coupling of the pressure and the flow of the traditional liquid distributor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0020] Figure 2 This is a perspective structural diagram of the injection head in an embodiment of the present invention;

[0021] In the above drawings: 1. liquid storage box; 2. injection head; 3. pipette; 4. high-pressure air pipe; 5. cylindrical cavity; 6. constricted cavity; 7. partition plate; 8. spring; 9. base; 10. heat transfer liquid; 11. injection cavity; 12. porous bottom plate. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0023] A tank spray atomization device, such as Figure 1 As shown, it includes a liquid suction unit and a liquid level stabilization unit. The liquid suction unit includes a liquid storage box 1, a high-pressure air pipe 4, a spray head 2 and a plurality of liquid suction tubes 3. The liquid storage box 1 is used to store heat transfer liquid 10. The heat transfer liquid 10 is pre-introduced into and stored in the liquid storage box 1 through an external liquid distributor. When the heat transfer liquid 10 in the liquid storage box 1 is used and reduced, it can also be replenished through the external liquid distributor. The shape of the liquid storage box 1 can be cylindrical or prismatic. In this embodiment, the liquid storage box 1 is set to be cylindrical.

[0024] A cylindrical base 9 is fixedly mounted in the middle of the bottom of the liquid reservoir 1, and a high-pressure air pipe 4 is mounted on this base 9. The high-pressure air pipe 4 comprises a cylindrical cavity 5 and a tapered cavity 6 with a gradually decreasing cross-section. The end of the cylindrical cavity 5, distal from the tapered cavity 6, is intended for connection to an external air pipe. A positioning groove is defined in the cylindrical base 9, into which the tapered cavity 6 of the high-pressure air pipe 4 is fixedly inserted. One end of the tapered cavity 6 passes through the base 9, exits the bottom of the liquid reservoir 1, and is then attached to the injector head 2.

[0025] A liquid pipette 3 is also welded to the outer wall of the constricted cavity 6 of the high-pressure gas pipe 4. In this embodiment, two liquid pipettes 3 are provided. The liquid pipette 3 is configured as a three-section curved tube. One end of the liquid pipette 3 extends into the heat transfer liquid 10. The other end of the liquid pipette 3 first extends out of the heat transfer liquid 10 to above the liquid level, then extends into the heat transfer liquid 10, passes through the base 9, and exits from the bottom of the liquid storage box 1. It is connected to the injection head 2 and welded thereto, so that the bend in the middle section of the liquid pipette 3 is located above the liquid level of the heat transfer liquid 10 in the liquid storage box 1. A conducting groove for the liquid pipette 3 to pass through is also provided on the inner surface of the positioning groove.

[0026] In this embodiment, if Figure 2As shown, the spray head 2 is a hollow cylinder, and a spray cavity 11 is arranged inside the spray head 2. The high-pressure air pipe 4 and the liquid suction pipe 3 are both communicated with the spray cavity 11. The bottom surface of the spray head 2 is provided with a porous bottom plate 12. The gas flows from above the cylindrical cavity 5 of the high-pressure air pipe 4, is compressed by the contraction cavity 6, and a negative pressure is formed inside the spray cavity 11 at the outlet of the high-pressure air pipe 4. Due to the action of the negative pressure, the heat transfer liquid 10 in the liquid storage box 1 is sucked into the spray cavity 11 through the liquid suction pipe 3. The movement direction of the heat transfer liquid 10 sucked into the spray cavity 11 through the liquid suction pipe 3 intersects with the movement direction of the gas sprayed by the high-pressure air pipe 4 in the spray cavity 11. In the spray cavity 11, the high-pressure air and the liquid are rubbed and disturbed with each other, the liquid is atomized, and the uniform distribution of the liquid in the distribution range is realized.

[0027] The liquid level stabilizing unit is used to adjust the liquid level of the heat transfer liquid 10 in the liquid storage box 1, and includes a partition plate 7. The partition plate 7 is arranged in an annular shape, and a hole is arranged in the middle part of the partition plate 7. The hole is sleeved on the base 9, and the partition plate 7 moves along the vertical direction along the outer wall of the base 9. A sealing ring or a sealing rubber strip is arranged between the partition plate 7 and the outer wall of the base 9 and between the partition plate 7 and the inner wall of the liquid storage box 1. The sealing ring or the sealing rubber strip is fixed to the outer periphery and the inner periphery of the partition plate 7, and is in sliding connection with the base 9 and the liquid storage box 1. The partition plate 7 divides the internal space of the liquid storage box 1 into a storage layer and an adjusting layer. The storage layer is located above the partition plate 7 and is used to store the heat transfer liquid 10. The adjusting layer is located below the partition plate 7, and a plurality of springs 8 are arranged in the adjusting layer. One end of each spring 8 is welded to the bottom of the partition plate 7, and the other end of each spring 8 is welded to the bottom of the liquid storage box 1. When the heat transfer liquid 10 is injected into the liquid storage box 1, the springs 8 are compressed under the action of the gravity of the heat transfer liquid 10. The more the heat transfer liquid 10, the greater the compression amount of the springs 8, and the greater the internal volume of the liquid storage box 1. The material of the springs 8 is determined based on the gravity and the volume of the liquid in the liquid storage box 1. The appropriate elastic springs 8 can realize the self-stabilization of the liquid level, that is, the extension and contraction amount of the springs 8 is equal to the height increment of the injected liquid within the elastic limit of the springs, and the height of the liquid level is stable during the suction. The range of the stable liquid level is controlled as follows: the lowest liquid surface is located above the suction inlet of the liquid suction pipe 3 to ensure that the heat transfer liquid 10 is smoothly sucked; and the highest liquid surface is located below the highest point of the liquid suction pipe 3 to ensure that the heat transfer liquid 10 does not flow into the spray cavity 11. The specific stable liquid level height can be designed and optimized according to the actual operation of the spray atomization. A liquid level sensor for detecting the height of the heat transfer liquid 10 is arranged in the liquid storage box 1. The liquid level sensor can be arranged on the inner wall of the liquid storage box 1 or the liquid suction pipe 3.

[0028] The storage tank spraying atomizing device in the scheme is a modular device, which can be used individually or simultaneously with multiple devices. The heat transfer liquid 10 flows into the liquid storage box 1 through an external liquid distributor in advance, and then the liquid level is maintained by the liquid level stabilizing unit to maintain the height difference of the suction inlet of the suction tube 3. The heat transfer liquid is atomized and sprayed by the negative pressure formed in the spraying cavity 11, and the outflow and liquid distribution range are only related to the air pressure, solving the problem of difficult flow distribution control caused by the mutual coupling of the pressure and flow of the traditional liquid distributor.

[0029] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present application, which should be covered by the scope of the claims of the present application.

Claims

1. A tank spray atomization device, characterized by: including a liquid pumping unit and a liquid level stabilization unit; The liquid suction unit comprises a liquid storage box (1), a high-pressure air pipe (4), a plurality of liquid suction pipes (3) and a spray head (2); the liquid storage box (1) is used to store heat transfer liquid (10); a base (9) is provided at the bottom of the liquid storage box (1); the high-pressure air pipe (4) is installed on the base (9); one end of the high-pressure air pipe (4) is used to connect to an external air pipe; the other end of the high-pressure air pipe (4) passes through the base (9) and then passes out from the bottom of the liquid storage box (1) and is installed with the spray head (2); one end of the liquid suction pipe (3) extends into the heat transfer liquid (10); the other end of the liquid suction pipe (3) first extends out of the heat transfer liquid (10) to above the liquid surface, then extends into the heat transfer liquid (10), passes through the base (9), and then passes out from the bottom of the liquid storage box (1) and is connected to the spray head (2); The liquid level stabilization unit is used to adjust the liquid level of the heat transfer liquid (10) in the liquid storage box (1), so that the suction port of the liquid pipe (3) always extends into the heat transfer liquid (10), and the highest point of the liquid pipe (3) is always located above the liquid surface of the heat transfer liquid (10).

2. A tank spray atomization device according to claim 1, characterized in that: The spray head (2) is provided with a spray chamber (11) inside, the high-pressure air pipe (4) and the liquid suction pipe (3) are both connected to the spray chamber (11), and the bottom surface of the spray head (2) is provided as a porous bottom plate (12).

3. The tank spray atomization device according to claim 1, characterized in that: The liquid level stabilizing unit comprises a partition plate (7), the partition plate (7) being arranged in the liquid storage box (1), the base (9) passing through the partition plate (7), the partition plate (7) moving in a vertical direction along the outer wall of the base (9), the partition plate (7) dividing the internal space of the liquid storage box (1) into a liquid storage layer and an adjustment layer, the liquid storage layer being located above the adjustment layer, a plurality of springs (8) being arranged in the adjustment layer, the two ends of the springs (8) being respectively connected to the bottom of the partition plate (7) and the bottom of the liquid storage box (1); when the volume of the heat transfer liquid (10) in the liquid storage box (1) changes, the spring (8) is deformed so that the depth of the pipette (3) extending into the heat transfer liquid (10) remains stable.

4. A tank spray atomization device according to claim 3, characterized in that: Sealing rings or sealing strips are installed between the partition plate (7) and the outer wall of the base (9), and between the partition plate (7) and the inner wall of the liquid storage box (1).

5. The tank spray atomization device according to claim 1, characterized in that: The high-pressure air pipe (4) comprises, from top to bottom, a cylindrical cavity (5) and a constricted cavity (6) with a gradually decreasing cross-section, and the end of the constricted cavity (6) is connected to the injection head (2).

6. The tank spray atomization device according to claim 5, characterized in that: A positioning groove is provided in the base (9), and the constricted cavity (6) of the high-pressure air pipe (4) is fixedly inserted in the positioning groove.

7. The tank spray atomization device according to claim 1, characterized in that: The liquid storage box (1) is configured to be cylindrical or prismatic.

8. The tank spray atomization device according to claim 1, characterized in that: The liquid pipette (3) is a bent structure, and the highest point of the liquid pipette (3) is located above the liquid level of the heat transfer liquid (10) in the liquid storage box (1).

9. The tank spray atomization device according to claim 2, characterized in that: The movement direction of the heat transfer liquid (10) sucked into the injection chamber (11) through the liquid suction pipe (3) intersects with the movement direction of the gas ejected from the high-pressure gas pipe (4) in the injection chamber (11).

10. The tank spray atomization device according to claim 1, characterized in that: A liquid level sensor for detecting the liquid level of the heat transfer liquid (10) is also provided inside the liquid storage box (1).

Images