Falling film evaporator condensate recovery device

Abstract

The utility model relates to condensate recovery device technical field, concretely relates to a kind of falling film evaporator condensate recovery device, including condensing tank, inner casing and flow guide assembly, the upper and lower ends of inner casing are fixedly connected with the inner side wall of condensing tank, condensing pipeline is equipped between inner casing and condensing tank, condensing pipeline is close to the outer side wall of inner casing, the inner side surface bottom of inner casing is fixedly connected with separating plate, separating plate separates condensing tank into the condensing chamber in upper and the separating chamber in lower, flow guide assembly is located in condensing tank, flow guide assembly includes inclined plate, fan blade, partition barrel and pivot. The utility model is inclined to the inclined plate and fan blade in flow guide assembly by reverse setting, cooperate driving assembly, guide the orderly flow of gas entering condensing tank first downward and then upward, simultaneously, partition barrel makes the gas close to inner casing outer side flowing downward, and then make the liquid to be recycled to exchange heat with condensing surface sufficiently, to improve condensing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of condensate recovery devices, specifically a condensate recovery device for a falling film evaporator. Background Technology

[0002] In the fields of chemical industry, food processing, and pharmaceutical manufacturing, falling film evaporators are widely used for the concentration of liquid materials due to their advantages such as high heat transfer efficiency and short material residence time. As the core supporting equipment of falling film evaporators, the main function of the condenser is to condense and liquefy the vapor containing the liquid to be recovered generated by the evaporator.

[0003] Currently, most falling film evaporator condensers on the market adopt a single condensation channel design, which is relatively simple in structure. Heat exchange is usually achieved only through the inner wall of the tank or a single tubular condensation structure. After the steam enters the condenser from the inlet pipe, it is mostly in a disordered diffusion state due to the lack of an effective flow guidance structure. This results in a short contact path and low adhesion between the steam and the condensation surface, and the liquid to be recovered cannot fully exchange heat with the condensation surface.

[0004] Therefore, a condensate recovery device for falling film evaporators is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a condensate recovery device for falling film evaporators. Through an inclined plate and fan blades arranged in a reverse direction in the flow guiding assembly, in conjunction with a drive assembly, the gas entering the condenser is guided to flow downwards and then upwards in an orderly manner. Simultaneously, the gas flows downwards from the outside of a separator, which brings the downward-flowing gas closer to the inner shell, improving the adhesion between the gas and the condensation surface. This allows the liquid to be recovered to fully exchange heat with the condensation surface, thereby improving condensation efficiency and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: including a condenser, an inner shell, and a flow guiding assembly, wherein the upper and lower ends of the inner shell are fixedly connected to the inner sidewall of the condenser, and a condensation pipe is provided between the inner shell and the condenser, the condensation pipe being closely attached to the outer sidewall of the inner shell; A separation plate is fixedly connected to the bottom of the inner side of the inner shell, and the separation plate divides the condenser into an upper condensation chamber and a lower separation chamber. The flow guiding assembly is located inside the condenser tank. The flow guiding assembly includes an inclined plate, fan blades, a partition barrel, and a rotating shaft. A drive assembly for driving the flow guiding assembly is installed on the top of the condenser tank.

[0007] An air inlet pipe is connected to the side of the condenser, and the opening of the air inlet pipe extends to the inner wall of the inner shell, with the opening of the air inlet pipe corresponding to the area above the flow guide assembly.

[0008] The top of the rotating shaft is connected to the drive assembly, the separator is sleeved outside the rotating shaft, the inclined plate is fixed to the outside of the separator, the fan blade is fixed to the inside of the separator, and the inclined plate and the fan blade are inclined in opposite directions.

[0009] The drive assembly includes a drive motor, a drive wheel, a driven wheel, and a transmission belt. The top end of the rotating shaft passes through the top of the condenser and is fixedly connected to the driven wheel. The output end of the drive motor is connected to the drive wheel. The drive wheel and the driven wheel are connected by a transmission belt. The rotating shaft is connected to the top of the condenser by a sealed bearing.

[0010] The plurality of inclined plates are arranged in parallel along the axial direction of the rotating shaft. The plurality of parallel inclined plates form a group, and each group of inclined plates is evenly arranged around the dividing barrel, with gaps left between each group of inclined plates for the flow of condensate.

[0011] The separation plate has multiple flow holes on its surface, which are used to allow the condensed liquid to flow into the separation chamber. The bottom of the condenser has a discharge port, and the bottom of the separation chamber is connected to the discharge port at the bottom of the condenser.

[0012] The upper end of the rotating shaft is rotatably connected to the upper center of the condenser, and the lower end of the rotating shaft is connected to the center of the upper surface of the separator plate through a bearing. The inclined plate, the separator, and the rotating shaft are concentrically arranged.

[0013] The top of the outer side of the condenser tank is provided with a top connection port, and the top of the inner side of the condenser tank is provided with a steam outlet. An auxiliary exhaust fan is fixedly installed on the shaft near the steam outlet.

[0014] Compared with the prior art, the present invention provides a condensate recovery device for falling film evaporators, which has the following beneficial effects: 1. Through the inclined plate and fan blades set in the opposite direction in the flow guiding component, in conjunction with the drive component, the gas entering the condenser is guided to flow downward and then upward in an orderly manner. At the same time, the gas flows downward from the outside of the separator. The separator makes the downward flowing gas closer to the inner shell, which improves the adhesion between the gas and the condensation surface. This allows the liquid to be recovered to fully exchange heat with the condensation surface, thereby improving the condensation efficiency.

[0015] 2. The rotating inclined plates can actively collide with and adsorb droplets in the gas. After a large number of droplets adhere to the surface of the inclined plates, they flow downwards from the gaps between the inclined plates. At the same time, the narrower flow path makes the droplets in the gas closer to the condensation surface, making it easier for the droplets to be adsorbed on the surface of the inner shell and collect. This accelerates the aggregation and collection of droplets, reduces the suspension time of droplets in the tank, and further improves the recovery efficiency of the liquid to be recovered. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 An isometric structural schematic diagram of the condensate recovery device for the falling film evaporator of this utility model; Figure 2 A cross-sectional structural schematic diagram of the condensate recovery device for the falling film evaporator of this utility model; Figure 3 A schematic cross-sectional view of the top portion of the condensate tank provided for the condensate recovery device of the falling film evaporator of this utility model; Figure 4 A schematic diagram of the outer surface structure of the flow guiding component provided for the condensate recovery device of the falling film evaporator of this utility model; Figure 5 A schematic cross-sectional view of the flow guiding component provided for the condensate recovery device of the falling film evaporator of this utility model. Figure 6 A schematic diagram of the connection structure between the flow guiding component and the separation plate provided for the condensate recovery device of the falling film evaporator of this utility model; Figure 7 A schematic diagram of the inner shell and condensation pipe structure provided for the condensate recovery device of the falling film evaporator of this utility model.

[0017] In the diagram: 1. Condensate tank; 2. Inner shell; 3. Flow guide assembly; 4. Condensate pipe; 5. Separator plate; 6. Condensate chamber; 7. Separator chamber; 8. Drive assembly; 9. Inlet pipe; 10. Flow hole; 11. Discharge port; 12. Top connection port; 13. Steam outlet; 14. Auxiliary exhaust fan; 301. Inclined plate; 302. Fan blade; 303. Separator barrel; 304. Rotating shaft; 801. Drive motor; 802. Drive wheel; 803. Driven wheel; 804. Transmission belt. Detailed Implementation

[0018] 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. Example

[0019] Please see Figure 1 - Figure 7 This embodiment of a falling film evaporator condensate recovery device includes a condenser tank 1, an inner shell 2, and a flow guiding assembly 3. The upper and lower ends of the inner shell 2 are fixedly connected to the inner sidewall of the condenser tank 1. A condensation pipe 4 is provided between the inner shell 2 and the condenser tank 1. The condensation pipe 4 is closely attached to the outer sidewall of the inner shell 2. Condensate with a temperature higher than the evaporation temperature of water but lower than the evaporation temperature of the liquid to be recovered flows in the condensation pipe 4. The condensate transfers the cooling energy to the gas to be treated inside the inner shell 2 through the inner shell 2, thereby reducing the gas temperature and causing the liquid to be recovered in the gas to condense into suspended droplets. A separation plate 5 is fixedly connected to the bottom of the inner side of the inner shell 2. The separation plate 5 divides the condenser tank 1 into an upper condensation chamber 6 and a lower separation chamber 7. The condensation chamber 6 is used to condense the gas, and the separation chamber 7 is used to collect the condensed liquid.

[0020] The flow guiding assembly 3 is located inside the condenser tank 1. The flow guiding assembly 3 includes an inclined plate 301, a fan blade 302, a separator 303, and a rotating shaft 304. A drive assembly 8 is installed on the top of the condenser tank 1 to drive the flow guiding assembly 3. The drive assembly 8 provides power for the rotation of the flow guiding assembly 3. The drive assembly 8 includes a drive motor 801, a driving wheel 802, a driven wheel 803, and a transmission belt 804. The top end of the rotating shaft 304 passes through the top of the condenser tank 1 and is fixedly connected to the driven wheel 803. The output end of the drive motor 801 is connected to the driving wheel 802. The driving wheel 802 and the driven wheel 803 are connected by the transmission belt 804. 4. Transmission connection: The rotating shaft 304 is connected to the top of the condenser tank 1 through a sealed bearing. The sealed bearing can effectively prevent gas leakage in the condenser tank 1. After the drive motor 801 starts, it drives the rotating shaft 304 to rotate through the transmission cooperation of the drive wheel 802, the transmission belt 804 and the driven wheel 803. The side of the condenser tank 1 is connected to the air inlet pipe 9. The opening of the air inlet pipe 9 extends to the inner wall of the inner shell 2. The opening of the air inlet pipe 9 corresponds to the upper area of ​​the flow guide component 3. The air inlet pipe 9 is connected to the falling film evaporator, which can accurately deliver the steam containing the liquid to be recovered generated by the evaporator to the area between the flow guide component 3 and the inner shell 2.

[0021] The top of the rotating shaft 304 is connected to the drive assembly 8. The separator 303 is sleeved on the outside of the rotating shaft 304. The inclined plate 301 is fixed on the outside of the separator 303, and the fan blade 302 is fixed on the inside of the separator 303. The inclined plate 301 and the fan blade 302 are inclined in opposite directions. When the rotating shaft 304 rotates, it will drive the separator 303, the inclined plate 301 and the fan blade 302 to rotate synchronously. The inclined plate 301 and the fan blade 302, which are inclined in opposite directions, can guide the gas to form an orderly flow trajectory that is first downward and then upward. At the same time, the distance between the separator 303 and the inner side of the inner shell 2 is less than one-eighth of the inner diameter of the inner shell 2, which can make the downward flowing gas closer to the inner shell 2, improve the adhesion between the gas and the condensation surface, and allow the liquid to be recovered to fully exchange heat with the condensation surface, thereby improving the condensation efficiency.

[0022] Furthermore, multiple inclined plates 301 are arranged parallel to each other in the axial direction of the rotating shaft 304. The multiple parallel inclined plates 301 form a group, and each group of inclined plates 301 is evenly arranged around the separator 303. A gap is left between each group of inclined plates 301 to allow the condensate to flow. The rotating inclined plates 301 can actively collide with and adsorb droplets in the gas. The gap between each group of inclined plates 301 provides a downward flow channel for the droplets adsorbed on the surface of the inclined plates 301. Multiple flow holes 10 are opened on the surface of the separation plate 5. The flow holes 10 are used to allow the condensed liquid to flow into the separation chamber 7. The bottom of the condenser tank 1 is provided with a discharge port 11. The bottom of the separation chamber 7 is connected to the discharge port 11 at the bottom of the condenser tank 1. The droplets flowing down from the gaps of the inclined plates 301 and the droplets directly adsorbed on the surface of the inner shell 2 will flow to the surface of the separation plate 5, and then enter the separation chamber 7 through the flow holes 10, and finally be discharged from the discharge port 11. The above process accelerates the aggregation and collection of droplets and reduces the suspension time of droplets in the tank.

[0023] The upper end of the rotating shaft 304 is rotatably connected to the upper center of the condenser tank 1, and the lower end of the rotating shaft 304 is connected to the center of the upper surface of the separation plate 5 through a bearing. The inclined plate 301, the separator 303 and the rotating shaft 304 are concentrically arranged to keep the flow guiding assembly 3 stable during high-speed rotation. The distances between the multiple sets of inclined plates 301 and the inner side of the inner shell 2 are all equal. The top of the outer side of the condenser tank 1 is provided with a top connection port 12, and the top of the inner side of the condenser tank 1 is provided with a steam outlet 13. An auxiliary exhaust fan 14 is fixedly installed on the rotating shaft 304 near the steam outlet 13. The steam outlet 13 is connected to the top connection port 12. Gas continuously enters through the air inlet pipe 9. The auxiliary exhaust fan 14 can accelerate the upward flow of gas guided by the fan blade 302 and discharge it from the steam outlet 13 to ensure stable gas pressure in the condenser chamber 6.

[0024] The working principle of the above embodiment is as follows: the separation plate 5 separates the condensation chamber 6 and the separation chamber 7. The drive component 8 drives the flow guide component 3 to rotate through the transmission belt 804. The gas is guided by the reverse tilting plate 301 and the fan blade 302 to first condense along the outside of the separation barrel 303 and then discharge upward along the inside of the separation barrel 303. At the same time, the liquid droplets are recovered through the adsorption of the tilting plate 301, the gap flow guidance, and the collection of the separation plate 5.

[0025] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A condensate recovery device for a falling film evaporator, characterized in that: It includes a condenser (1), an inner shell (2) and a flow guide assembly (3). The upper and lower ends of the inner shell (2) are fixedly connected to the inner sidewall of the condenser (1). A condensation pipe (4) is provided between the inner shell (2) and the condenser (1). The condensation pipe (4) is closely attached to the outer sidewall of the inner shell (2). A separation plate (5) is fixedly connected to the bottom of the inner side of the inner shell (2). The separation plate (5) divides the condenser (1) into an upper condensation chamber (6) and a lower separation chamber (7). The flow guiding component (3) is located inside the condenser (1). The flow guiding component (3) includes an inclined plate (301), a fan blade (302), a separator (303), and a rotating shaft (304). A drive component (8) for driving the flow guiding component (3) is installed on the top of the condenser (1).

2. The condensate recovery device for a falling film evaporator according to claim 1, characterized in that: The condenser (1) is connected to an air inlet pipe (9) on its side. The opening of the air inlet pipe (9) extends to the inner wall of the inner shell (2). The opening of the air inlet pipe (9) corresponds to the upper area of ​​the flow guide assembly (3).

3. The condensate recovery device for a falling film evaporator according to claim 1, characterized in that: The top of the rotating shaft (304) is connected to the drive assembly (8), the separator (303) is sleeved on the outside of the rotating shaft (304), the inclined plate (301) is fixed on the outside of the separator (303), the fan blade (302) is fixed on the inside of the separator (303), and the inclined plate (301) and the fan blade (302) are inclined in opposite directions.

4. The condensate recovery device for a falling film evaporator according to claim 1, characterized in that: The drive assembly (8) includes a drive motor (801), a drive wheel (802), a driven wheel (803), and a transmission belt (804). The top end of the shaft (304) passes through the top of the condenser (1) and is fixedly connected to the driven wheel (803). The output end of the drive motor (801) is connected to the drive wheel (802). The drive wheel (802) and the driven wheel (803) are connected by transmission belt (804). The shaft (304) is connected to the top of the condenser (1) by a sealed bearing.

5. The condensate recovery device for a falling film evaporator according to claim 1, characterized in that: Multiple inclined plates (301) are arranged in parallel along the axial direction of the rotating shaft (304). The multiple parallel inclined plates (301) form a group. Each group of inclined plates (301) is evenly arranged around the separator (303), and a gap is left between each group of inclined plates (301) for the flow of condensate.

6. The condensate recovery device for a falling film evaporator according to claim 1, characterized in that: The separation plate (5) has multiple flow holes (10) on its surface. The flow holes (10) are used to allow the condensed liquid to flow into the separation chamber (7). The bottom of the condenser (1) is provided with a discharge port (11). The bottom of the separation chamber (7) is connected to the discharge port (11) at the bottom of the condenser (1).

7. The condensate recovery device for a falling film evaporator according to claim 1, characterized in that: The upper end of the rotating shaft (304) is rotatably connected to the upper center of the condenser (1), and the lower end of the rotating shaft (304) is connected to the center of the upper surface of the separation plate (5) through a bearing. The inclined plate (301), the separator (303) and the rotating shaft (304) are concentrically arranged.

8. The condensate recovery device for a falling film evaporator according to claim 1, characterized in that: The condenser (1) has a top connection port (12) on the outer top and a steam outlet (13) on the inner top. An auxiliary exhaust fan (14) is fixedly installed on the shaft (304) near the steam outlet (13).

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