Hot water flash tank

Abstract

The utility model relates to the technical field of flash tanks, and discloses a hot water flash tank which comprises a tank body, a first ventilation pipeline is fixedly connected to the upper surface of the tank body, a Venturi tube is fixedly connected to one end of the first ventilation pipeline, a second ventilation pipeline is fixedly connected to one end of the Venturi tube, and a preheating tank is fixedly connected to one end of the second ventilation pipeline. A draught fan is arranged below the tank body, the output end of the draught fan is fixedly connected with a fourth ventilation pipeline, and a flow blowing assembly is arranged in the tank body; and the flow blowing assembly comprises a ventilation pipe, a first connecting ring and a spiral flow deflector, the outer wall of the ventilation pipe is fixedly connected to the interior of the fourth ventilation pipeline, and the outer wall of the first connecting ring is fixedly connected to the inner wall of the tank body. According to the device, the fan is started, air flow is conveyed to the ventilation pipe from the fourth ventilation pipeline, the steam flowing speed is increased, natural flowing is changed into vortex flowing through the spiral flow deflectors, contact with the inner wall is reduced, and the condensation probability is reduced.

Description

Technical Field

[0001] This utility model relates to the field of flash evaporator technology, and in particular to a hot water flash evaporator. Background Technology

[0002] Hot water flash tanks are high-efficiency evaporation devices widely used in industries such as chemical, food, and pharmaceutical. They are mainly used to rapidly evaporate high-temperature liquids under low pressure to generate usable secondary steam. Traditional flash evaporation technology relies on the self-evaporation effect of the liquid after pressure reduction. The generated steam rises and is collected through natural convection. However, due to the low efficiency of steam flow, the steam is prone to liquefaction back into the furnace, affecting production output.

[0003] Currently, common flash tanks typically employ a single-stage tank structure. High-temperature liquid enters the tank through a pressure-reducing valve, where it partially vaporizes due to a sudden pressure drop. The steam rises slowly due to its own buoyancy and eventually exits from the top of the tank. The tank interior usually features smooth walls or a simple baffle design to reduce flow resistance. During its ascent, the steam contacts the tank wall, and some heat is lost through the wall surface, causing the steam temperature to drop. Some steam re-condenses into liquid, reducing the effective steam output. Furthermore, the slow steam flow velocity makes it prone to stagnation within the tank, further exacerbating condensation and affecting flash efficiency. However, the aforementioned traditional flash tanks have a significant drawback in actual operation: the slow steam rise velocity and large contact area with the tank inner wall result in a large amount of steam re-condensing due to heat loss during ascent, limiting the flash tank's efficiency. This is especially problematic in industrial scenarios requiring continuous and stable steam output, where steam condensation losses directly impact energy consumption and economic efficiency. Therefore, a hot water flash tank is proposed to address these issues. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a hot water flash evaporator, which aims to improve the situation where the steam rises slowly and has a large contact area with the inner wall of the tank, causing a large amount of steam to recondense due to heat loss during the rise.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a hot water flash tank, comprising a tank body, a ventilation duct one fixedly connected to the upper surface of the tank body, a venturi tube fixedly connected to one end of the ventilation duct one, a ventilation duct two fixedly connected to one end of the venturi tube, a preheating tank fixedly connected to one end of the ventilation duct two, a fan arranged below the tank body, a ventilation duct four fixedly connected to the output end of the fan, and a blowing assembly arranged inside the tank body;

[0006] The blowing assembly includes a ventilation pipe, a connecting ring, and a spiral guide vane. The outer wall of the ventilation pipe is fixedly connected to the inside of the ventilation duct, the outer wall of the connecting ring is fixedly connected to the inner wall of the tank, one end of the spiral guide vane is fixedly connected to the inner wall of the connecting ring, and a heating assembly is provided inside the tank.

[0007] Furthermore, a second connecting ring is fixedly connected to the inner wall of the tank, a first heating coil is fixedly connected inside the second connecting ring, a third connecting ring is fixedly connected to the inner wall of the tank, and a second heating coil is fixedly connected inside the third connecting ring.

[0008] Furthermore, one end of the spiral guide vane is fixedly connected to the inner wall of the connecting ring three, and a ventilation duct three is fixedly connected above the preheating tank.

[0009] Furthermore, a recycling bin is fixedly connected to one end of the ventilation duct, and a water pipe is fixedly connected inside the recycling bin.

[0010] Furthermore, a second water pump is installed on one side of the outer wall of the recycling bin, and a third water pipe is fixedly connected to the output end of the second water pump.

[0011] Furthermore, a nozzle is fixedly connected to the outer wall of the third water pipe, and a second water pipe is fixedly connected inside the recycling bin.

[0012] Furthermore, a water pump is provided on the other side of the outer wall of the recycling bin. The input end of the water pump is fixedly connected to one end of the water pipe, and the output end of the water pump is fixedly connected to the water pipe.

[0013] Furthermore, one end of the water pipe is fixedly connected to the inside of the tank, and a one-way valve is installed at the bottom of the tank.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, by starting a fan, airflow is delivered from ventilation duct 4 to ventilation pipe, which accelerates the steam flow speed. The spiral guide vane changes the natural flow to vortex flow, reducing contact with the inner wall and lowering the probability of condensation. The steam comes into the Venturi tube through ventilation duct 1. The Venturi tube actively draws in the steam using the negative pressure generated by the high-speed fluid, improving the efficiency of the draw. Two flash chambers are set to prevent the steam from condensing midway, thereby improving the practicality of the device.

[0016] 2. In this utility model, the cooled steam comes to the recovery tank through ventilation pipe three for recycling. Water pump two is started to draw water flow, which is sprayed out from the nozzle through water pipe three to cool the steam and turn it into liquid. Water pump one is started to draw water from water pipe two to water pipe one, which flows into the tank for recycling, thereby improving the practicality of the device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a hot water flash evaporator proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the recovery tank section of a hot water flash tank proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the preheating tank section of a hot water flash evaporator proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of a portion of the connecting ring structure of a hot water flash tank proposed in this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of a hot water flash tank proposed in this utility model.

[0022] Legend:

[0023] 1. Tank; 2. Ventilation duct one; 3. Venturi tube; 4. Ventilation duct two; 5. Ventilation duct three; 6. Water pipe one; 7. Preheating tank; 8. Fan; 9. Ventilation duct four; 10. Water pump one; 11. Water pipe two; 12. Recovery box; 13. Water pump two; 14. Water pipe three; 15. One-way valve; 16. Ventilation pipe; 17. Connecting ring one; 18. Heating coil one; 19. Connecting ring two; 20. Spiral guide vane; 21. Heating coil two; 22. Connecting ring three; 23. Nozzle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1-4This utility model provides an embodiment of a hot water flash evaporator, including a tank body 1. The tank body 1 serves to support and connect other components, providing a basic framework for the entire device. A ventilation duct 1 2 is fixedly connected to the upper surface of the tank body 1. A venturi tube 3 is fixedly connected to one end of the ventilation duct 1 2. The venturi tube 3 actively draws in steam using the negative pressure generated by the high-speed fluid, improving the efficiency of the draw-in and preventing steam stagnation. A second ventilation duct 4 is fixedly connected to one end of the venturi tube 3, and a preheating tank 7 is fixedly connected to one end of the second ventilation duct 4. The preheating tank 7, together with ventilation duct 2 4 and ventilation duct 3 5, delivers cooled steam to the recovery box 12 through ventilation duct 3 5 for recycling. A fan 8 is installed below the tank body 1. The fan 8 used in this application is an HG010-12AD1 single impeller fan with a power of 75W to 120W. It is used to accelerate the flow speed of steam inside the tank body 1. This is existing technology and will not be described in detail here. The output end of the fan 8 is fixedly connected to ventilation duct 4 9. A blowing assembly is installed inside the tank body 1.

[0026] The blowing assembly includes a ventilation pipe 16, a connecting ring 17, and a spiral guide vane 20. The outer wall of the ventilation pipe 16 is fixedly connected to the inside of the ventilation duct 4 9. The outer wall of the connecting ring 17 is fixedly connected to the inner wall of the tank 1. The connecting ring 17 serves to support and connect other components. One end of the spiral guide vane 20 is fixedly connected to the inner wall of the connecting ring 17. The spiral guide vane 20 changes the natural flow to vortex flow, reduces contact with the inner wall, and lowers the probability of condensation. A heating assembly is installed inside the tank 1. Two flash chambers are set to prevent steam from condensing midway. A connecting ring 2 19 is fixedly connected to the inner wall of the tank 1. A heating coil 18 is fixedly connected inside the connecting ring 2 19. A connecting ring 3 22 is fixedly connected to the inner wall of the tank 1. A heating coil 21 is fixedly connected inside the connecting ring 3 22. The heating coil 21 is used for heating to prevent steam from condensing midway.

[0027] Reference Figures 1-5 One end of the spiral guide vane 20 is fixedly connected to the inner wall of the connecting ring 22. The connecting ring 22 serves to support and connect other components. A ventilation duct 5 is fixedly connected above the preheating tank 7. The ventilation duct 5 transports the cooled steam to the recovery box 12 for recovery. One end of the ventilation duct 5 is fixedly connected to the recovery box 12, and spraying is performed inside the recovery box 12. A water pipe 14 is fixedly connected inside the recovery box 12. A water pump 13 is installed on one side of the outer wall of the recovery box 12. The water pump 13 used in this application is an Ebara 3P stainless steel horizontal centrifugal pump with a maximum flow rate of 240 m³ / h. 3The pump 13 is used to draw water for spraying, converting cooled steam into liquid. This is existing technology and will not be elaborated further here. Pump 14 draws water and sprays it through nozzles 23 to convert cooled steam into liquid. A water pipe 14 is fixedly connected to the output end of pump 13, and nozzles 23 are fixedly connected to the outer wall of water pipe 14. A water pipe 11 is fixedly connected inside the recovery tank 12, and pump 10 is installed on the other side of the outer wall of the recovery tank 12. Pump 10 used in this application is an Ebara 3P stainless steel horizontal centrifugal pump with a maximum flow rate of 240 m³ / h. 3 The pump is used to draw water and transport the converted liquid to the tank 1 for use. This is existing technology and will not be described in detail here. The input end of the pump 10 is fixedly connected to one end of the water pipe 2 11. Through the cooperation of the pump 10, the water pipe 2 11 and the water pipe 6, the converted liquid is transported to the tank 1 for use. The output end of the pump 10 is fixedly connected to the water pipe 6. One end of the water pipe 6 is fixedly connected to the inside of the tank 1. A one-way valve 15 is installed at the bottom of the tank 1 to prevent liquid backflow.

[0028] Working principle: When using the hot water flash tank, the liquid to be evaporated flows into the tank 1 through the inlet. Heating coils 18 and 21, fixed inside connecting rings 19 and 22, heat and evaporate the liquid. Two flash chambers are provided to prevent steam condensation midway. Fan 8 directs airflow from ventilation duct 4 to ventilation pipe 16, accelerating steam flow. Spiral guide vanes 20, fixed to connecting rings 17 and 22, change the natural flow to vortex flow, reducing contact with the inner wall and lowering the probability of condensation. A one-way valve 15 prevents liquid from condensing. The steam flows backward through ventilation duct 2 into venturi tube 3. Venturi tube 3 actively draws in steam using the negative pressure generated by the high-speed fluid, improving the efficiency of the draw. The steam then flows through ventilation duct 4 into preheating tank 7 to preheat the liquid that needs to be preheated. The cooled steam flows through ventilation duct 5 into recovery tank 12 for recycling. Water pump 2 13 is activated to draw water, which is then sprayed out from nozzle 23 through water pipe 3 14 to cool the steam and convert it into a liquid state. Water pump 10 is activated to draw water from water pipe 2 11 into water pipe 6, which then flows into tank 1 for recycling.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hot water flash evaporator, comprising a tank body (1), characterized in that: A ventilation duct 1 (2) is fixedly connected to the upper surface of the tank (1). A venturi tube (3) is fixedly connected to one end of the ventilation duct 1 (2). A ventilation duct 2 (4) is fixedly connected to one end of the venturi tube (3). A preheating tank (7) is fixedly connected to one end of the ventilation duct 2 (4). A fan (8) is provided below the tank (1). A ventilation duct 4 (9) is fixedly connected to the output end of the fan (8). A blowing assembly is provided inside the tank (1). The blowing assembly includes a ventilation pipe (16), a connecting ring (17), and a spiral guide vane (20). The outer wall of the ventilation pipe (16) is fixedly connected to the inside of the ventilation duct (9). The outer wall of the connecting ring (17) is fixedly connected to the inner wall of the tank (1). One end of the spiral guide vane (20) is fixedly connected to the inner wall of the connecting ring (17). A heating assembly is provided inside the tank (1).

2. A hot water flash evaporator according to claim 1, characterized in that: A second connecting ring (19) is fixedly connected to the inner wall of the tank (1), and a first heating coil (18) is fixedly connected inside the second connecting ring (19). A third connecting ring (22) is fixedly connected to the inner wall of the tank (1), and a second heating coil (21) is fixedly connected inside the third connecting ring (22).

3. A hot water flash evaporator according to claim 1, characterized in that: One end of the spiral guide vane (20) is fixedly connected to the inner wall of the connecting ring three (22), and a ventilation duct three (5) is fixedly connected above the preheating tank (7).

4. A hot water flash evaporator according to claim 3, characterized in that: One end of the ventilation duct (5) is fixedly connected to a recycling box (12), and a water pipe (14) is fixedly connected inside the recycling box (12).

5. A hot water flash evaporator according to claim 4, characterized in that: A second water pump (13) is installed on one side of the outer wall of the recycling bin (12), and a third water pipe (14) is fixedly connected to the output end of the second water pump (13).

6. A hot water flash evaporator according to claim 5, characterized in that: A nozzle (23) is fixedly connected to the outer wall of the third water pipe (14), and a second water pipe (11) is fixedly connected inside the recycling box (12).

7. A hot water flash evaporator according to claim 6, characterized in that: A water pump (10) is provided on the other side of the outer wall of the recycling bin (12). The input end of the water pump (10) is fixedly connected to one end of the water pipe (11), and the output end of the water pump (10) is fixedly connected to the water pipe (6).

8. A hot water flash evaporator according to claim 7, characterized in that: One end of the water pipe (6) is fixedly connected to the inside of the tank (1), and a one-way valve (15) is provided below the tank (1).

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