Preheating recovery device for flash evaporation system

Abstract

The utility model discloses a preheating recovery device for a flash evaporation system, which comprises a bottom plate, a flash evaporation tank, a water tank, a liquid outlet pipe connected to the bottom of the flash evaporation tank, an air outlet pipe connected to the top of the flash evaporation tank and a water inlet pipe connected to the inner wall of one side of the water tank, wherein the flash evaporation tank and the water tank are respectively mounted at two ends of the outer wall of the top of the bottom plate. Liquid can firstly enter the water tank through the water inlet pipe, is heated through the heating assembly to reach a saturated state and then enters the flash tank for flash evaporation, steam is discharged through the air outlet pipe to drive the pneumatic assembly and the heating assembly to rotate, and water which is not discharged completely in the water tank can be conveniently stirred and rotatably drained. The water draining efficiency can be improved, water flow is smoother, water can be preheated through the heat exchange assembly when steam enters the heat exchange assembly to heat the heat exchange assembly and then enters the next batch of liquid to be heated, the effect of steam waste heat recovery is achieved, and heat waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flash evaporation, in particular to a preheating recovery device for a flash evaporation system. Background Technique

[0002] Flash evaporation means that when high-pressure saturated water enters a lower-pressure container, due to the sudden decrease in pressure, part of the saturated water will be converted into saturated water vapor and saturated water under the pressure of the container. Heating the liquid before flash evaporation is to make the liquid reach the saturated state, that is, reach the highest temperature allowed for the liquid under this pressure. In this way, when the liquid enters the low-pressure container, due to the decrease in pressure, part of the liquid will quickly turn into steam. The temperature of the gas discharged from the flash tank is usually relatively high, and these gases are directly discharged to the outside, resulting in waste of some heat. Content of the Utility Model

[0003] The purpose of the utility model is to provide a preheating recovery device for a flash evaporation system to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A preheating recovery device for a flash evaporation system, comprising: a bottom plate, a flash tank and a water tank respectively installed at both ends of the outer wall of the top of the bottom plate, a liquid outlet pipe connected to the bottom of the flash tank and a gas outlet pipe connected to the top of the flash tank, and further comprising: a water inlet pipe connected to the inner wall of one side of the water tank, a preheating box is installed on the water inlet pipe, and a plurality of heat exchange components are installed on the preheating box at equal intervals. The top of the heat exchange component is connected to the gas outlet pipe, and the bottom of the heat exchange component is connected to an exhaust pipe. A communication pipe is connected between the flash tank and the water tank, and a pressure reducing valve is installed on the communication pipe. A heating component is rotatably installed in the middle of the outer wall of the top of the water tank, and a pneumatic component is installed on the outer wall of the gas outlet pipe. The bottom of the pneumatic component is connected to the top of the heating component.

[0005] The heat exchange component includes a heat exchange pipe, a central rod arranged in the heat exchange pipe, and spiral blades fixed on the outer wall of the central rod.

[0006] The heating component includes a rotating pipe, a conductive slip ring installed on the outer wall of the rotating pipe, a plurality of stirring pipes connected to the inner walls of both sides of the rotating pipe at equal intervals, and electric heating pipes installed on the inner walls of the stirring pipes.

[0007] The pneumatic component includes a rotating shaft and a plurality of fan blades fixed on the outer wall of the rotating shaft at equal intervals.

[0008] The electric heating pipe is connected to the inner slip ring rotor of the conductive slip ring through a wire.

[0009] The spiral blades extend to the outside of the heat exchange pipe.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] A preheating recovery device for a flash evaporation system of the present utility model. Liquid can first enter the water tank through the water inlet pipe, and is heated by the heating component to make the liquid reach a saturated state, then enter the flash evaporation tank for flash evaporation. The steam is discharged through the air outlet pipe, driving the pneumatic component and the heating component to rotate, which is convenient to stir up the water that has not been drained completely in the water tank for rotary drainage, improving the drainage efficiency and making the water flow more smoothly. The steam then enters the heat exchange component to heat the heat exchange component. When heating the next batch of liquid, the heat exchange component can preheat the water, playing a role in recovering the waste heat of the steam and reducing heat waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the external view structure diagram of the present utility model;

[0013] Figure 2 It is the sectional view structure diagram of the preheating tank of the present utility model;

[0014] Figure 3 It is the sectional view structure diagram of the heat exchange component of the present utility model;

[0015] Figure 4 It is the sectional view structure diagram of the heating component of the present utility model;

[0016] Figure 5 It is the structure diagram of the pneumatic component of the present utility model.

[0017] In the figure: 1, bottom plate; 2, flash evaporation tank; 3, water tank; 4, liquid outlet pipe; 5, air outlet pipe; 6, water inlet pipe; 7, preheating tank; 8, heat exchange component; 801, heat exchange tube; 802, central rod; 803, spiral blade; 9, exhaust pipe; 10, connecting pipe; 11, pressure reducing valve; 12, heating component; 1201, rotating pipe; 1202, conductive slip ring; 1203, stirring pipe; 1204, electric heating tube; 13, pneumatic component; 1301, rotating shaft; 1302, fan blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1-5, a preheating recovery device for a flash evaporation system provided by the utility model, includes: a bottom plate 1, a flash evaporation tank 2 and a water tank 3 respectively installed at both ends of the outer wall of the top of the bottom plate 1, a liquid outlet pipe 4 connected to the bottom of the flash evaporation tank 2, and a gas outlet pipe 5 connected to the top of the flash evaporation tank 2. It further includes: a water inlet pipe 6 connected to the inner wall of one side of the water tank 3, a preheating tank 7 installed on the water inlet pipe 6, and a plurality of heat exchange components 8 evenly distributed at equal intervals installed on the preheating tank 7. The top of the heat exchange component 8 is connected to the gas outlet pipe 5, and the bottom of the heat exchange component 8 is connected to an exhaust pipe 9. A communicating pipe 10 is connected between the flash evaporation tank 2 and the water tank 3, and a pressure reducing valve 11 is installed on the communicating pipe 10. A heating component 12 is rotatably installed in the middle of the outer wall of the top of the water tank 3, and a pneumatic component 13 is installed on the outer wall of the gas outlet pipe 5. The bottom of the pneumatic component 13 is connected to the top of the heating component 12.

[0020] It should be noted here that: the liquid can first enter the water tank 3 through the water inlet pipe 6, and the liquid is heated by the heating component 12. After heating for a certain period of time, the liquid reaches the saturated state, and then the pressure reducing valve 11 is opened to enable the liquid to enter the flash evaporation tank 2. When the liquid enters the flash evaporation tank 2, due to the reduction of pressure, part of the liquid will quickly turn into steam and be discharged through the gas outlet pipe 5, blowing on the pneumatic component 13 to drive the pneumatic component 13 to rotate, and then drive the heating component 12 to rotate, which is convenient to stir up the water that has not been drained in the water tank 3 and drain the water by rotation, improving the drainage efficiency and making the water flow more smoothly. The steam then enters the heat exchange component 8 to heat the heat exchange component 8 and is discharged through the exhaust pipe 9. After the liquid in the water tank 3 is drained, the pressure reducing valve 11 can be closed, and then the next batch of liquid is introduced for heating. The liquid enters the preheating tank 7 through the water inlet pipe 6 and then enters the water tank 3. When the liquid enters the preheating tank 7, it contacts the heat exchange component 8, and the heat exchange component 8 preheats the water, playing a role in recovering the waste heat of the steam and reducing the waste of heat.

[0021] In a preferred embodiment, the heat exchange component 8 includes a heat exchange tube 801, a central rod 802 arranged in the heat exchange tube 801, and a spiral blade 803 fixed on the outer wall of the central rod 802.

[0022] It should be noted here that: when the steam enters the heat exchange tube 801, the central rod 802 and the spiral blade 803 provided can make the steam flow spirally downward in the heat exchange tube 801. While reducing the steam flow rate, the steam fully contacts the heat exchange tube 801 to heat the heat exchange tube 801.

[0023] In a preferred embodiment, the heating component 12 includes a rotating tube 1201, a conductive slip ring 1202 installed on the outer wall of the rotating tube 1201, a plurality of stirring tubes 1203 evenly distributed at equal intervals connected to the inner walls on both sides of the rotating tube 1201, and an electric heating tube 1204 installed on the inner wall of the stirring tube 1203.

[0024] It should be noted here that the electric heating tube 1204 can heat the liquid in the water tank 3, and the pneumatic assembly 13 can drive the rotating tube 1201 and the stirring tube 1203 to rotate to stir the water.

[0025] In a preferred embodiment, the pneumatic assembly 13 includes a rotating shaft 1301 and a plurality of equally spaced fan blades 1302 fixed to the outer wall of the rotating shaft 1301.

[0026] It should be noted here that the steam flows in the air outlet pipe 5 and can blow on the fan blades 1302 to drive the rotating shaft 1301 to rotate.

[0027] In a preferred embodiment, the electric heating tube 1204 is connected to the inner slip ring rotor of the conductive slip ring 1202 through a wire.

[0028] It should be noted here that when the electric heating tube 1204 rotates with the rotating tube 1201, there will be no problem of wire entanglement.

[0029] In a preferred embodiment, the spiral blade 803 extends to the outside of the heat exchange tube 801.

[0030] It should be noted here that it helps to increase the contact area with the liquid and improve the heat exchange effect.

[0031] Working principle: The liquid can first enter the water tank 3 through the water inlet pipe 6. The electric heating tube 1204 can heat the liquid in the water tank 3. After heating for a certain period of time, the liquid reaches the saturated state. Then, the pressure reducing valve 11 is opened to allow the liquid to enter the flash tank 2. When the liquid enters the flash tank 2, due to the reduction in pressure, part of the liquid will quickly turn into steam and be discharged through the air outlet pipe 5. The steam flows in the air outlet pipe 5 and blows on the fan blades 1302 to drive the rotating shaft 1301 to rotate, and then drives the rotating tube 1201 and the stirring tube 1203 to rotate to stir the water. The rotating drainage can improve the drainage efficiency and make the water flow more smoothly. The steam then enters the heat exchange tube 801. The arranged central rod 802 and spiral blade 803 can make the steam flow spirally downward in the heat exchange tube 801. While reducing the steam flow rate, the steam fully contacts the heat exchange tube 801 to heat the heat exchange tube 801. After the liquid in the water tank 3 is drained, the pressure reducing valve 11 can be closed, and the next batch of liquid can be introduced for heating. The liquid enters the preheating tank 7 through the water inlet pipe 6 and then enters the water tank 3. When the liquid enters the preheating tank 7, it contacts the heat exchange tube 801 and the spiral blade 803 to preheat the water, playing a role in recovering the waste heat of the steam and reducing the waste of heat.

[0032] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A preheating recovery device for a flash evaporation system, comprising: a bottom plate (1), a flash evaporation tank (2) and a water tank (3) respectively installed at both ends of the top outer wall of the bottom plate (1), a liquid outlet pipe (4) connected to the bottom of the flash evaporation tank (2), and a gas outlet pipe (5) connected to the top of the flash evaporation tank (2); It is characterized in that it further comprises: a water inlet pipe (6) connected to the inner wall of one side of the water tank (3), a preheating box (7) is installed on the water inlet pipe (6), and a plurality of heat exchange components (8) are installed on the preheating box (7) at equal intervals. The top of the heat exchange component (8) is connected to the gas outlet pipe (5), and the bottom of the heat exchange component (8) is connected to an exhaust pipe (9). A communicating pipe (10) is connected between the flash evaporation tank (2) and the water tank (3), and a pressure reducing valve (11) is installed on the communicating pipe (10). A heating component (12) is rotatably installed in the middle of the top outer wall of the water tank (3), and a pneumatic component (13) is installed on the outer wall of the gas outlet pipe (5). The bottom of the pneumatic component (13) is connected to the top of the heating component (12).

2. The preheating recovery device for a flash evaporation system according to claim 1, wherein: The heat exchange component (8) includes a heat exchange pipe (801), a central rod (802) arranged in the heat exchange pipe (801), and a spiral blade (803) fixed on the outer wall of the central rod (802).

3. A preheating recovery device for a flash evaporation system according to claim 1, characterized in that: The heating component (12) includes a rotating pipe (1201), a conductive slip ring (1202) installed on the outer wall of the rotating pipe (1201), a plurality of stirring pipes (1203) installed on the inner walls of both sides of the rotating pipe (1201) at equal intervals, and an electric heating pipe (1204) installed on the inner wall of the stirring pipe (1203).

4. The preheating recovery device for a flash evaporation system according to claim 1, wherein: The pneumatic component (13) includes a rotating shaft (1301) and a plurality of fan blades (1302) fixed on the outer wall of the rotating shaft (1301) at equal intervals.

5. The preheating recovery device for a flash evaporation system according to claim 3, characterized in that: The electric heating pipe (1204) is connected to the inner slip ring rotor of the conductive slip ring (1202) through a wire.

6. The preheating recovery device for a flash evaporation system according to claim 2, characterized in that: The spiral blade (803) extends outside the heat exchange pipe (801).

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