An evaporative falling film device

Abstract

This utility model relates to the field of sterilization technology, and in particular to an evaporation falling film device, comprising a primary reaction vessel, an evaporation chamber, and a secondary reaction vessel. The primary reaction vessel and the secondary reaction vessel have the same structure. The bottom end of the primary reaction vessel is connected to the inner top end of the evaporation chamber through a pipe, and the inner bottom end of the evaporation chamber is connected to the inner bottom end of the secondary reaction vessel through a pipe. A pressure gauge and an exhaust pipe are installed at the top of the evaporation chamber, and the inlets of the pressure gauge and the exhaust pipe are connected to the interior of the evaporation chamber. The material enters the interior of the primary reaction vessel from the bottom end, and after reaching a certain liquid level, it is drawn into the interior of the evaporation chamber by the suction pipe. The internal pressure of the primary reaction vessel is much higher than the internal pressure of the evaporation chamber, so the material inside the primary reaction vessel is actually forced into the interior of the evaporation chamber. When the material moves from the high-pressure area to the low-pressure area, the boiling point decreases, thereby further widening the difference in boiling points of the components after moving from high pressure to low pressure.

Description

Technical Field

[0001] This utility model relates to the field of sterilization machine technology, and in particular to an evaporation falling film device. Background Technology

[0002] An evaporator is a device that evaporates moisture from materials, increasing their concentration. It lowers the boiling point of the material to around 60°C by creating a vacuum, allowing water to evaporate at this temperature. The basic process of a falling film evaporator is as follows: The material enters the heater, which heats it, causing a film to form along the heating tube wall. Partially vaporized steam carries the material down the pipe from the top to the bottom. The mixture of gas and liquid enters the evaporation chamber. In the evaporation chamber (also called a gas-liquid separator), gas-liquid separation occurs. The gas flows through a pipe above the evaporation chamber to the condenser. The gas is cooled in the condenser, turning back into liquid, which is then discharged by a centrifugal pump. Non-condensable gases are removed by a water ring vacuum pump; the vacuum environment of the entire system is also generated by the vacuum pump. The liquid after gas-liquid separation in the evaporation chamber forms the finished product, which is then pumped out by a centrifugal pump. This completes the evaporation process.

[0003] Traditional equipment uses direct steam injection without much post-processing, making it difficult to control the concentration of concentrated materials and often resulting in substandard concentrations. Utility Model Content

[0004] The purpose of this invention is to provide an evaporative falling film device to solve the problems existing in the prior art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] An evaporation falling film reactor includes a primary reactor, an evaporation chamber, and a secondary reactor. The primary reactor and the secondary reactor have the same structure. The bottom end of the primary reactor is connected to the top inner end of the evaporation chamber via a pipe. The bottom inner end of the evaporation chamber is connected to the bottom inner end of the secondary reactor via a pipe. A pressure gauge and an exhaust pipe are installed at the top of the evaporation chamber. The inlets of the pressure gauge and the exhaust pipe are both connected to the interior of the evaporation chamber.

[0007] By adopting the above technical solution, the material enters the interior of the primary reactor from the bottom and, after reaching a certain liquid level, is drawn into the evaporation chamber through the suction pipe. The internal pressure of the primary reactor is much higher than that inside the evaporation chamber, which is at atmospheric pressure. Therefore, the material inside the primary reactor is actually forced into the evaporation chamber. When the material moves from the high-pressure region to the low-pressure region, its boiling point decreases. Due to the heat energy it contains, it evaporates rapidly. Because of the different compositions of the material, the boiling points of each component are also different. This further widens the difference in boiling points of each component after moving from high pressure to low pressure, and then some low-boiling-point substances inside are evaporated and removed.

[0008] In a further embodiment, the primary reactor includes a cylindrical body, a tubular heat exchanger, a feed pipe, a pressure relief valve, and a filter. The cylindrical body is a hollow, closed structure. The tubular heat exchanger is disposed inside the cylindrical body. The top and bottom of the tubular heat exchanger are respectively provided with a medium inlet and a medium outlet, which pass through the top and bottom of the cylindrical body, respectively. An exhaust port is provided at the top of the cylindrical body. A straight pipe is fixedly installed at the top of the cylindrical body, and the bottom end of the straight pipe communicates with the exhaust port. The filter is used to completely block the exhaust port, and the pressure relief valve is disposed at the top of the straight pipe.

[0009] By adopting the above technical solution, when the internal pressure of the primary reactor exceeds the set standard, the pressure relief valve will automatically release pressure to ensure the safety of the primary reactor.

[0010] In a further embodiment, an exhaust fan is provided on one side of the evaporation chamber, the exhaust fan draws air from the top of the evaporation chamber, and a filter membrane is provided at the position where the exhaust fan communicates with the top of the evaporation chamber.

[0011] By adopting the above technical solution, in order to further reduce the boiling point of each component of the material inside the evaporation chamber, the interior of the evaporation chamber is drawn into a negative pressure state by an exhaust fan. However, in order to prevent the material from being drawn away by the exhaust fan, a filter membrane is set to block the material. In actual use, the exhaust fan is equivalent to an exhaust pipe, which is also used to quickly extract water vapor from the interior of the evaporation chamber.

[0012] In a further embodiment, the section of the tubular heat exchanger located inside the cylinder is arranged in a loop shape.

[0013] By adopting the above technical solution, the U-shaped arrangement is used to increase the length of the pipe heat exchanger inside the shell, so that the heat of the heat exchange medium inside the pipe heat exchanger can be fully absorbed by the material inside the shell, thereby achieving higher heat exchange efficiency.

[0014] In a further embodiment, the evaporation chamber includes a double-layered vacuum shell and an end cap, the end cap being detachably disposed on top of the double-layered vacuum shell.

[0015] By adopting the above technical solution, the detachable design is used to facilitate cleaning of the evaporator chamber.

[0016] In summary, this utility model has the following beneficial effects:

[0017] 1. The material enters the primary reactor from the bottom and, after reaching a certain liquid level, is drawn into the evaporation chamber through a suction pipe. The internal pressure of the primary reactor is much higher than that inside the evaporation chamber, which is at atmospheric pressure. Therefore, the material inside the primary reactor is actually forced into the evaporation chamber. As the material moves from the high-pressure region to the low-pressure region, its boiling point decreases, and due to its heat content, it evaporates rapidly. Because of the different components of the material, their boiling points also differ, further widening the gap in boiling points as the material moves from high pressure to low pressure. This process effectively evaporates and removes some low-boiling-point substances from the material. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram illustrating the internal structure of the primary reactor and the internal structure of the evaporation chamber of this utility model.

[0020] In the diagram, 1. Primary reactor; 11. Shell; 12. Pipeline heat exchanger; 13. Feed pipe; 14. Pressure relief valve; 15. Filter plate; 2. Evaporation chamber; 3. Secondary reactor; 4. Pressure gauge; 5. Exhaust pipe. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0023] Example 1:

[0024] like Figures 1-2 As shown, an evaporator falling film reactor includes a primary reactor 1, an evaporation chamber 2, and a secondary reactor 3. The primary reactor 1 and the secondary reactor 3 have the same structure. The bottom end of the primary reactor 1 is connected to the inner top end of the evaporation chamber 2 via a pipe, and the inner bottom end of the evaporation chamber 2 is connected to the inner bottom end of the secondary reactor 3 via a pipe. A pressure gauge 4 and an exhaust pipe 5 are installed on the top of the evaporation chamber 2, and the inlets of the pressure gauge 4 and the exhaust pipe 5 are both connected to the interior of the evaporation chamber 2. The primary reactor 1 includes a cylindrical body 11, a tubular heat exchanger 12, a feed pipe 13, a pressure relief valve 14, and a filter 15. The cylindrical body 11 is a hollow, closed structure. The tubular heat exchanger 12 is installed inside the cylindrical body 11, and the top of the tubular heat exchanger 12... The cylinder 11 has a medium inlet and a medium outlet at its top and bottom, respectively, which pass through the top and bottom of the cylinder 11. An exhaust port is located at the top of the cylinder 11, and a straight pipe is fixedly installed at the top of the cylinder 11, with its bottom end connected to the exhaust port. A filter 15 completely seals the exhaust port, and a pressure relief valve 14 is located at the top of the straight pipe. An exhaust fan is located on one side of the evaporation chamber 2, drawing air from the top of the evaporation chamber 2. A filter membrane is installed at the point where the exhaust fan connects to the top of the evaporation chamber 2. A section of the tubular heat exchanger 12 inside the cylinder 11 is arranged in a U-shape. The evaporation chamber 2 includes a double-layer vacuum shell and end caps, with the end caps detachably mounted on the top of the double-layer vacuum shell.

[0025] The specific implementation process is as follows: The material enters the first-stage reactor from the bottom and, after reaching a certain liquid level, is drawn into the evaporation chamber through a suction pipe. The internal pressure of the first-stage reactor is much higher than that inside the evaporation chamber, which is at atmospheric pressure. Therefore, the material inside the first-stage reactor is actually forced into the evaporation chamber. As the material moves from the high-pressure area to the low-pressure area, its boiling point decreases due to the heat it contains, causing it to evaporate rapidly. Due to the different compositions of the material, the boiling points of each component are also different, further widening the gap in boiling points as the material moves from high pressure to low pressure. This process effectively evaporates and removes some low-boiling-point substances. When the internal pressure of the first-stage reactor exceeds the set standard, the pressure relief valve will automatically release pressure to ensure the safety of the first-stage reactor.

[0026] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0027] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An evaporating falling-film apparatus, characterized by: It includes a primary reactor (1), an evaporation chamber (2), and a secondary reactor (3). The primary reactor (1) has the same structure as the secondary reactor (3). The bottom end of the primary reactor (1) is connected to the top inner end of the evaporation chamber (2) through a pipe. The bottom inner end of the evaporation chamber (2) is connected to the bottom inner end of the secondary reactor (3) through a pipe. A pressure gauge (4) and an exhaust pipe (5) are installed on the top of the evaporation chamber (2). The inlets of the pressure gauge (4) and the exhaust pipe (5) are both connected to the interior of the evaporation chamber (2).

2. An evaporating falling-film apparatus according to claim 1, characterized in that The primary reactor (1) includes a cylindrical body (11), a pipe heat exchanger (12), a feed pipe (13), a pressure relief valve (14), and a filter (15). The cylindrical body (11) is a closed structure with a hollow interior. The pipe heat exchanger (12) is located inside the cylindrical body (11). The top and bottom ends of the pipe heat exchanger (12) are respectively provided with a medium inlet and a medium outlet. The medium inlet and the medium outlet pass through the top and bottom of the cylindrical body (11), respectively. The top of the cylindrical body (11) is provided with an exhaust hole. A straight pipe is fixedly installed on the top of the cylindrical body (11). The bottom end of the straight pipe is connected to the exhaust hole. The filter (15) is used to completely block the exhaust hole. The pressure relief valve (14) is located at the top of the straight pipe.

3. An evaporating falling-film apparatus according to claim 1, characterized in that: An exhaust fan is provided on one side of the evaporation chamber (2). The exhaust fan draws air from the top of the evaporation chamber (2) and a filter membrane is provided at the position where the exhaust fan communicates with the top of the evaporation chamber (2).

4. An evaporating falling-film apparatus according to claim 2, characterized in that: The tubular heat exchanger (12) is located in a loop-shaped section inside the cylinder (11).

5. An evaporating falling-film apparatus according to claim 1, characterized in that: The evaporation chamber (2) includes a double-layer vacuum shell and an end cap, the end cap being detachably disposed on top of the double-layer vacuum shell.

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