Centrifugal flash tank structure and heat pump circulation system

Abstract

The application discloses a centrifugal flash tank structure, which comprises a flash tank, a spiral pipe, a wire mesh and an auxiliary monitoring mechanism; a fluid inlet, a steam discharge outlet, a lower discharge outlet and a drain port are installed on the flash tank; the spiral pipe is installed in the inner cavity of the flash tank through a fixing assembly; a tapered pipe is installed at the top end of the spiral pipe, and an expanding pipe is installed at the bottom end of the spiral pipe; a plurality of holes are formed in the spiral pipe, and the holes are communicated with the inner cavity of the flash tank; the wire mesh is installed on the inner wall of the flash tank and located above the spiral pipe; the auxiliary monitoring mechanism is installed on the flash tank and used for detecting the pressure, liquid level and temperature in the flash tank; wherein, the tapered pipe is fixedly connected with the fluid inlet and communicated with the fluid inlet, and the expanding pipe is fixedly connected with the lower discharge outlet and communicated with the lower discharge outlet. The application can realize the recovery of residual pressure and efficient gas-liquid separation, thereby improving the energy utilization efficiency of the overall system and reducing the energy consumption.

Description

Technical Field

[0001] This invention relates to the field of steam generation technology, and in particular to a centrifugal flash evaporator structure. Background Technology

[0002] Flash evaporation is the process where high-pressure saturated water enters a relatively low-pressure container, and due to the sudden drop in pressure, the saturated water is converted into a portion of the saturated water vapor and saturated water at the container pressure. The function of a flash tank is to provide a space for rapid vaporization and vapor-liquid separation of fluids.

[0003] Existing flash tanks include a fixed support, connecting flange, thermometer, mounting interface, fluid inlet, wire mesh, upper head, steam outlet, pressure gauge mounting port, level sensor interface, nozzle, cylinder, lower head, and lower outlet. (Refer to...) Figure 1 When the fluid enters the tank, it will be sprayed directly into the tank through the nozzle, which reduces the flow rate of some of the fluid and causes some energy loss of the fluid. At the same time, it will also affect the efficiency of gas-liquid separation.

[0004] Therefore, a centrifugal flash tank structure is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a centrifugal flash tank structure that aims to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a centrifugal flash tank structure, comprising: A flash tank, wherein the flash tank is equipped with a fluid inlet, a steam outlet, a bottom outlet, and a drain outlet; A spiral tube is installed in the inner cavity of the flash tank by a fixing assembly; a tapered pipe is installed at the top end of the spiral tube and a expanding pipe is installed at the bottom end; the spiral tube has several holes that communicate with the inner cavity of the flash tank. A wire mesh is installed on the inner wall of the flash tank and located above the spiral tube; An auxiliary monitoring mechanism is installed on the flash tank to detect the pressure, liquid level, and temperature inside the flash tank. The converging pipe is fixedly connected to and communicates with the fluid inlet, and the expanding pipe is fixedly connected to and communicates with the lower outlet.

[0007] According to a centrifugal flash tank structure provided by the present invention, the fixing assembly includes: A fixed bracket is fixedly installed on the inner side wall of the flash tank, and the fixed bracket is provided with a drain outlet; A plurality of vertical rods are provided, and the plurality of vertical rods are fixedly installed on the top of the fixed bracket; The spiral tube is wound around several vertical rods, and the spiral tube is fixedly installed on the vertical rods by several pipe clamps.

[0008] According to a centrifugal flash tank structure provided by the present invention, a plurality of holes are formed on the outer wall of the spiral tube near the vertical rod, and the plurality of holes are arranged at equal intervals.

[0009] According to the present invention, a centrifugal flash tank structure is provided, the flash tank includes a cylindrical body, an upper end cap is fixedly installed on the top of the cylindrical body, a lower end cap is detachably connected to the bottom of the cylindrical body, and a plurality of supports are fixedly connected to the bottom of the lower end cap. The drain outlet is fixedly installed at the bottom of the lower end cap, the steam outlet is fixedly installed at the top of the upper end cap, the fluid inlet is fixedly installed at the top of the side wall of the cylinder, and the lower outlet is fixedly installed at the bottom of the side wall of the cylinder. The hole, the drain outlet, the steam outlet, the fluid inlet, and the lower outlet are all connected to the inner cavity of the cylinder. The wire mesh is fixed to the top of the inner wall of the cylinder, the fixing bracket is fixedly installed at the bottom of the inner wall of the cylinder, the spiral tube is located in the inner cavity of the cylinder, and the auxiliary monitoring mechanism is installed on the cylinder to detect the pressure, liquid level and temperature inside the cylinder.

[0010] According to the present invention, a centrifugal flash tank structure is provided, wherein the outer wall of the cylinder is provided with a thermometer mounting interface, a liquid level sensor interface and a pressure gauge mounting port, and the auxiliary monitoring mechanism includes a pressure gauge, a temperature sensor and a liquid level gauge; the pressure gauge, the temperature sensor and the liquid level gauge are respectively mounted on the pressure gauge mounting port, the thermometer mounting interface and the liquid level sensor interface.

[0011] According to a centrifugal flash tank structure provided by the present invention, the lower end cap is detachably connected to the cylinder body via a connecting flange.

[0012] According to the centrifugal flash tank structure provided by the present invention, the pipe clamp is a U-shaped pipe clamp.

[0013] According to the present invention, the centrifugal flash tank structure has a circular cross-sectional shape for the holes.

[0014] The present invention also provides a heat pump circulation system, including a heat exchanger, one end of which is fixedly connected and communicated with the lower outlet of the flash tank through a first pipeline, and the other end of which is fixedly connected and communicated with the fluid inlet of the flash tank through a second pipeline, and a pump is installed on the first pipeline.

[0015] The present invention discloses the following technical effects: The flash evaporator of this invention utilizes the Bernoulli effect of fluids to achieve residual energy recovery during flash evaporation. High-pressure external fluid enters the flash evaporator through a converging pipe, accelerating while its static pressure decreases. Steam evaporates as the fluid flows at high speed within the spiral tube. Water is prevented from overflowing by centrifugal force within the spiral tube and, guided by the spiral tube, flows to a expanding pipe, exiting through the bottom outlet of the flash evaporator. As the fluid decelerates in the expanding pipe, the static pressure partially recovers, achieving residual pressure recovery and efficient gas-liquid separation, thereby improving the overall system's energy utilization efficiency and reducing energy consumption. The steam flashed within the flash evaporator is discharged into the flash evaporator's inner cavity through holes in the spiral tube, while the water vapor passes through a wire mesh and exits through the top steam outlet. The spiral tube of this invention allows the fluid to rotate at high speed inside the tube, relying on centrifugal force to keep the fluid from overflowing, while promoting the effective separation of the gas and liquid phases. Steam is evenly discharged into the tank cavity through the holes of the spiral tube and further filtered through the wire mesh to ensure the purity of the steam and the smoothness of discharge, significantly improving the efficiency of gas-liquid separation. The auxiliary monitoring mechanism of the present invention can detect the pressure, liquid level and temperature inside the flash tank, which not only enhances the stability and reliability of the equipment, but also facilitates daily maintenance and troubleshooting, and improves the overall operating efficiency and service life of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments 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.

[0017] Figure 1 This is a schematic diagram of the structure of a flash tank in the prior art; Figure 2 This is a front view of the centrifugal flash tank structure of the present invention; Figure 3 This is a schematic diagram of the centrifugal flash tank structure of the present invention; Figure 4 This is a schematic diagram of the spiral tube structure in this invention; Figure 5 This is a schematic diagram of the heat pump cycle system of the present invention.

[0018] The components are as follows: 1. Connecting flange; 2. Liquid level sensor interface; 3. Cylinder; 4. Fluid inlet; 5. Steam outlet; 6. Upper head; 7. Pressure gauge mounting port; 8. Thermometer mounting interface; 9. Lower outlet; 10. Lower head; 11. Support; 12. Fixed bracket; 13. Spiral tube; 14. Wire mesh; 15. U-shaped pipe clamp; 16. Drain outlet; 17. Gradually contracting pipe; 18. Gradually expanding pipe; 19. Heat exchanger; 20. Pump. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1-5 The present invention provides a centrifugal flash tank structure, comprising: A flash tank is equipped with a fluid inlet 4, a steam outlet 5, a lower outlet 9, and a drain outlet 16. The spiral tube 13 is installed in the inner cavity of the flash tank by a fixing assembly; a tapered pipe 17 is installed at the top end of the spiral tube 13 and a expanding pipe 18 is installed at the bottom end; the spiral tube 13 has several holes that communicate with the inner cavity of the flash tank. Wire mesh 14 is installed on the inner wall of the flash tank and is located above the spiral tube 13; The auxiliary monitoring unit is installed on the flash tank and is used to detect the pressure, liquid level and temperature inside the flash tank; Among them, the converging pipe 17 is fixedly connected to and communicates with the fluid inlet 4, and the expanding pipe 18 is fixedly connected to and communicates with the lower outlet 9. With this configuration, the flash tank of the present invention utilizes the Bernoulli effect of fluids to achieve water pressure residual energy recovery during flash evaporation. The high-pressure fluid from the outside enters the flash tank through the converging pipe 17. As the fluid accelerates, the static pressure decreases. While flowing at high speed in the spiral tube, steam is evaporated. The water flow in the spiral tube is kept from overflowing by centrifugal force and flows to the expanding pipe 18 under the guidance of the spiral tube, and is discharged from the bottom outlet 9 of the flash tank. As the fluid decelerates, the static pressure in the expanding pipe 18 is partially restored, realizing residual pressure recovery and efficient gas-liquid separation, thereby improving the energy utilization efficiency of the overall system and reducing energy consumption. The steam flashed in the flash tank is discharged into the inner cavity of the flash tank through the holes on the spiral tube. The water vapor passes through the wire mesh 14 and is discharged from the top steam outlet 5. The spiral tube of the present invention allows the fluid to rotate at high speed inside the tube, relying on centrifugal force to keep the fluid from overflowing, while promoting the effective separation of the gas and liquid phases. The steam is evenly discharged into the tank cavity through the holes of the spiral tube and further filtered through the wire mesh 14 to ensure the purity of the steam and the smoothness of discharge, which significantly improves the efficiency of gas-liquid separation. The auxiliary monitoring mechanism of the present invention can detect the pressure, liquid level and temperature inside the flash tank, which not only enhances the stability and reliability of the equipment, but also facilitates daily maintenance and troubleshooting, and improves the overall operating efficiency and service life of the equipment.

[0022] Further optimization of the solution includes fixed components: A fixed bracket 12 is fixedly installed on the inner wall of the flash tank, and a drain outlet is provided on the fixed bracket 12. A number of vertical rods are provided, and the vertical rods are fixedly installed on the top of the fixed bracket 12; The spiral tube 13 is wound around several vertical rods and is fixedly installed on the vertical rods by several pipe clamps; the spiral tube 13 is wound around the vertical rods and fixed by pipe clamps to ensure that the spiral tube remains stable under the action of high-speed fluid.

[0023] In a further optimized design, several holes are made on the outer wall of the spiral tube 13 near the vertical rod, and the holes are arranged at equal intervals. The high-pressure fluid enters the flash tank through the fluid inlet 4, first passes through the tapered pipe 17 to accelerate and reduce static pressure, and then enters the spiral tube 13. It rotates at high speed inside the tube, and centrifugal force is used to keep the fluid from overflowing. During the rotation, the fluid evaporates to generate steam, and the steam is evenly discharged into the inner cavity of the flash tank through the equally spaced holes on the outer wall of the spiral tube 13.

[0024] The design is further optimized. The flash tank includes a cylinder 3. An upper end cap 6 is fixedly installed on the top of the cylinder 3, and a lower end cap 10 is detachably connected to the bottom. Several supports 11 are fixedly connected to the bottom of the lower end cap 10. The drain outlet 16 is fixedly installed at the bottom of the lower head 10, the steam outlet 5 is fixedly installed at the top of the upper head 6, the fluid inlet 4 is fixedly installed at the top of the side wall of the cylinder 3, and the lower outlet 9 is fixedly installed at the bottom of the side wall of the cylinder 3. The drain outlet 16, the steam outlet 5, the fluid inlet 4 and the lower outlet 9 are all connected to the inner cavity of the cylinder 3. The wire mesh 14 is fixed to the top of the inner wall of the cylinder 3, the fixed bracket 12 is fixedly installed at the bottom of the inner wall of the cylinder 3, the spiral tube 13 is located in the inner cavity of the cylinder 3, and the auxiliary monitoring mechanism is installed on the cylinder 3 to detect the pressure, liquid level and temperature inside the cylinder 3.

[0025] The scheme is further optimized by providing a thermometer mounting interface 8, a liquid level sensor interface 2, and a pressure gauge mounting port 7 on the outer wall of the cylinder 3. The auxiliary monitoring mechanism includes a pressure gauge, a temperature sensor, and a liquid level gauge. The pressure gauge, temperature sensor, and liquid level gauge are respectively installed on the pressure gauge mounting port 7, the thermometer mounting interface 8, and the liquid level sensor interface 2. Pressure gauges, temperature sensors, and level gauges can monitor the pressure, level, and temperature inside the flash tank in real time. This data provides an important basis for the stable operation of the equipment and facilitates daily maintenance and troubleshooting.

[0026] The design was further optimized so that the lower end cap 10 can be detachably connected to the cylinder 3 via the connecting flange 1, which facilitates equipment maintenance, cleaning and component replacement.

[0027] The solution was further optimized, and the pipe clamps were changed to U-shaped pipe clamps (15).

[0028] The design was further optimized so that the cross-sectional shape of the hole is circular.

[0029] Working principle: The centrifugal flash tank structure of this invention is based on the Bernoulli effect of fluids: (1) When the pipe is wider, the flow velocity decreases and the pressure increases, and vice versa. Assume the working pressure inside the flash tank is one atmosphere. The flow velocity inside the spiral tube is then... (2) When the flow rate remains constant, the ratio of pipe contraction or expansion can be determined by the relationship between flow velocity and pipe diameter. Let the inlet pipe diameter be D1, then the diameter D2 of the spiral pipe is... (3) To prevent water from leaking out of the semi-open spiral tube due to gravity, the time it takes for the water to flow down the tube from top to bottom must be less than the time it takes for the water to fall freely. Let the total length of the spiral tube be L, then the time it takes to travel through the spiral tube is: (4) Let H be the height difference between the top and bottom of the spiral tube, then the time taken for free fall is... (5) Therefore, for a fixed pipe length L, it is necessary to ensure that (6) The present invention also provides a heat pump circulation system, including a heat exchanger 19, one end of which is fixedly connected and communicated with the lower outlet 9 of the flash tank through a first pipeline, and the other end of which is fixedly connected and communicated with the fluid inlet 4 of the flash tank through a second pipeline, and a pump 20 is installed on the first pipeline. When fluid flows downwards through a spiral tube in a flash evaporator, the centrifugal force converts gravity into kinetic energy, giving the fluid a velocity u. An ideal liquid experiences no energy loss during steady flow within the tube. During the flow, due to its velocity, in addition to potential energy and pressure energy, kinetic energy is also significant. Therefore, when fluid flows steadily downwards in a spiral tube, the kinetic energy per unit volume of the fluid (1 / 2 * ρ * u) is... 2 The velocity will increase when the kinetic energy is discharged from the lower outlet 9 and enters the inlet of pump 20. According to Bernoulli's equation, this part of the kinetic energy will be converted into pressure energy, that is, the inlet pressure of pump 20 will be increased, which is equivalent to recovering a part of the pump work. The heat pump cycle system forms a closed-loop system through heat exchanger 19, flash tank, pump 20, and corresponding pipelines, achieving efficient energy utilization and recovery. Low-temperature, low-pressure fluid enters heat exchanger 19 through a second pipeline, is heated in the heat exchanger, pressurized by pump 20, and then enters flash tank through fluid inlet 4. Inside flash tank, the fluid undergoes a flashing process, generating steam and releasing energy. Simultaneously, the rotation and centrifugal force of the fluid within the spiral tube promote gas-liquid separation. Steam is discharged through steam outlet 5, while the fluid returns to heat exchanger 19 through lower outlet 9 and the first pipeline. In heat exchanger 19, the fluid returning from flash tank releases its remaining heat to the low-temperature, low-pressure fluid entering the system, achieving heat exchange and recovery. Through this cycle, the heat pump cycle system can continuously absorb heat from a low-temperature heat source and transfer it to the medium requiring heating, achieving efficient energy utilization and recovery.

[0030] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0031] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A centrifugal flash evaporator structure, characterized in that, include: A flash tank, which is equipped with a fluid inlet (4), a steam outlet (5), a lower outlet (9) and a drain outlet (16). A spiral tube (13) is installed in the inner cavity of the flash tank by a fixing assembly; a tapered pipe (17) is installed at the top end of the spiral tube (13) and a expanding pipe (18) is installed at the bottom end; a plurality of holes are provided on the spiral tube (13) and the holes are connected to the inner cavity of the flash tank. A wire mesh (14) is installed on the inner wall of the flash tank and is located above the spiral tube (13); An auxiliary monitoring mechanism is installed on the flash tank to detect the pressure, liquid level, and temperature inside the flash tank. The converging pipe (17) is fixedly connected to and communicates with the fluid inlet (4), and the expanding pipe (18) is fixedly connected to and communicates with the lower outlet (9).

2. The centrifugal flash evaporator structure according to claim 1, characterized in that: The fixing component includes: A fixed bracket (12) is fixedly installed on the inner side wall of the flash tank, and the fixed bracket (12) is provided with a drain outlet; A plurality of vertical rods are provided, and the plurality of vertical rods are fixedly installed on the top of the fixed bracket (12); The spiral tube (13) is wound around several of the vertical rods, and the spiral tube (13) is fixedly installed on the vertical rods by several pipe clamps.

3. The centrifugal flash evaporator structure according to claim 2, characterized in that: Several holes are formed on the outer wall of the spiral tube (13) near the vertical rod, and the holes are arranged at equal intervals.

4. The centrifugal flash evaporator structure according to claim 2, characterized in that: The flash tank includes a cylindrical body (3), with an upper end cap (6) fixedly installed on the top of the cylindrical body (3) and a lower end cap (10) detachably connected to the bottom. Several supports (11) are fixedly connected to the bottom of the lower end cap (10). The drain outlet (16) is fixedly installed at the bottom of the lower end cap (10), the steam outlet (5) is fixedly installed at the top of the upper end cap (6), the fluid inlet (4) is fixedly installed at the top of the side wall of the cylinder (3), and the lower outlet (9) is fixedly installed at the bottom of the side wall of the cylinder (3). The hole, the drain outlet (16), the steam outlet (5), the fluid inlet (4) and the lower outlet (9) are all connected to the inner cavity of the cylinder (3). The wire mesh (14) is fixed to the top of the inner wall of the cylinder (3), the fixed bracket (12) is fixedly installed at the bottom of the inner wall of the cylinder (3), the spiral tube (13) is located in the inner cavity of the cylinder (3), and the auxiliary monitoring mechanism is installed on the cylinder (3) to detect the pressure, liquid level and temperature inside the cylinder (3).

5. The centrifugal flash evaporator structure according to claim 4, characterized in that: The outer wall of the cylinder (3) is provided with a thermometer mounting interface (8), a liquid level sensor interface (2) and a pressure gauge mounting port (7). The auxiliary monitoring mechanism includes a pressure gauge, a temperature sensor and a liquid level gauge. The pressure gauge, the temperature sensor and the liquid level gauge are respectively installed on the pressure gauge mounting port (7), the thermometer mounting interface (8) and the liquid level sensor interface (2).

6. The centrifugal flash evaporator structure according to claim 4, characterized in that: The lower end cap (10) is detachably connected to the cylinder (3) via a connecting flange (1).

7. The centrifugal flash evaporator structure according to claim 2, characterized in that: The pipe clamp is a U-shaped pipe clamp (15).

8. The centrifugal flash evaporator structure according to claim 1, characterized in that: The cross-sectional shape of the hole is circular.

9. A heat pump circulation system, based on the centrifugal flash tank structure according to any one of claims 1-8, characterized in that: Includes a heat exchanger (19), one end of which is fixedly connected and communicated with the lower outlet (9) of the flash tank through a first pipeline, and the other end of which is fixedly connected and communicated with the fluid inlet (4) of the flash tank through a second pipeline, and a pump (20) is installed on the first pipeline.

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