A falling film evaporator
By setting up vertical pipes in the evaporator and heating with thermal oil, the existing evaporators have solved the problems of large heat consumption and slow heating speed, and efficient solvent heating and steam generation are achieved, and solvent cracking is avoided.
Patent Information
- Application Number
- CN202421440280.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-21
AI Technical Summary
Existing evaporators need to consume more heat when heating large batches of solvents, and the heating speed is slow, which can easily lead to solvent cleavage.
A falling film evaporator is designed. By setting up several vertical pipes in the tank body and heating them with thermal oil, the solvent flows along the inside of the pipe in a film-like manner, evaporates quickly and flows out of the outlet to avoid cracking caused by long-term heat.
This design effectively improves the heating efficiency of the solvent, reduces heat loss, avoids solvent cracking, and increases the steam generation speed.
Smart Images
Figure CN222708986U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vapor phase drying systems, in particular to a falling film evaporator. Background Art
[0002] In the vapor phase drying system of transformer drying, the evaporator is the core component. Its quality and efficiency will directly affect the transformer drying effect and energy consumption. The existing evaporators on the market are mainly composed of two parts: a heating chamber and an evaporation chamber. The solvent is heated in the heating chamber to generate solvent vapor in the evaporation chamber. Although this method of heating to obtain solvent vapor is simple and the equipment structure is not complicated, it consumes a lot of heat to heat a large amount of solvent to steam. If the solvent absorbs too much heat, it will also cause solvent cracking, and the speed of generating steam is slow. Utility Model Content
[0003] In view of the deficiencies of the prior art, the utility model provides a falling film evaporator, which solves the problem that the prior evaporator requires a large amount of heat energy to generate solvent vapor and the speed is slow.
[0004] To achieve the above objectives, the utility model is implemented through the following technical scheme. The utility model provides a falling film evaporator, including a tank body, wherein the upper and lower ends of the tank body are respectively connected to a top distributor and a liquid collecting chamber, and the upper and lower ends of the interior of the tank body are respectively fixedly installed with supporting plates, and a pair of vertical pipes are fixedly installed between the supporting plates, and the upper and lower ends of the vertical pipes are respectively connected to the top distributor and the liquid collecting chamber, and a pair of solvent input ports are provided at the upper end of the top distributor, and a liquid return port and a solvent vapor outlet are respectively provided on the lower end and side wall of the liquid collecting chamber.
[0005] Preferably, a heat transfer oil outlet and a heat transfer oil inlet are respectively provided at the upper and lower ends of the side wall of the tank body.
[0006] Preferably, an expansion joint is provided on the tank body.
[0007] Beneficial Effects
[0008] The utility model provides a falling film evaporator, which has the following beneficial effects:
[0009] 1. Several vertical pipes are vertically arranged in the tank body. The inside of the tank body is heated by heat transfer oil. The solvent flows into the top distributor from the solvent inlet, and then flows into the vertical pipe. The solvent flows downward along the inside of the vertical pipe in a film-like shape. During the flow, the solvent will be heated and evaporated, and finally flow out from the solvent vapor outlet. This structure can effectively increase the surface area of the solvent, which is conducive to rapid heating and reduces heat loss.
[0010] 2. Since the solvent flows vertically in the vertical pipe, the solvent liquid stays on the pipe wall for a short time and will not cause solvent cracking due to overheating. Since the solvent liquid is distributed in a film-like manner inside the pipe and flows quickly, the heat transfer coefficient is also large. Since the solvent liquid is driven by gravity and airflow, it does not require greater power or temperature to drive it. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of the utility model.
[0012] In the figure: 1. Solvent inlet; 2. Heat transfer oil outlet; 3. Expansion joint; 4. Heat transfer oil inlet; 5. Solvent vapor outlet; 6. Liquid collecting chamber; 7. Liquid return port; 8. Tank body; 9. Top distributor; 10. Vertical pipeline. DETAILED DESCRIPTION
[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0014] See also Figure 1 The utility model provides a technical solution: a falling film evaporator, comprising a tank body 8, wherein the upper and lower ends of the tank body 8 are respectively connected with a top distributor 9 and a liquid collecting chamber 6, and the upper and lower ends of the tank body 8 are respectively fixedly installed with a supporting plate, and a plurality of vertical pipes 10 are fixedly installed between a pair of the supporting plates, and the upper and lower ends of the plurality of vertical pipes 10 are respectively connected with the top distributor 9 and the liquid collecting chamber 6, and a pair of solvent input ports 1 are provided at the upper end of the top distributor 9, and a liquid return port 7 and a solvent vapor outlet 5 are respectively provided on the lower end and the side wall of the liquid collecting chamber 6; after the tank body 8 is filled with heat-conducting oil, the outer walls of the plurality of vertical pipes 10 will be wrapped, and when the solvent flows downward in a film-like manner along the inside of the vertical pipes 10, it will quickly obtain sufficient heat to form solvent vapor, so that the heating efficiency is very fast and it can also avoid the situation where the solvent is heated for a long time without forming vapor and finally cracking.
[0015] Furthermore, a heat transfer oil outlet 2 and a heat transfer oil inlet 4 are respectively provided at the upper and lower ends of the side wall of the tank body 8 .
[0016] Furthermore, an expansion joint 3 is provided on the tank body 8 .
[0017] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the field. The following mainly introduces the working principle and process.
[0018] Embodiment: When in use, heat transfer oil is circulated into the tank body through the heat transfer oil outlet 2 and the heat transfer oil inlet 4 for heating, and the solvent flows into the top distributor 9 from the solvent input port 1, and then the solvent flows into the vertical pipe 10, and the solvent flows downward along the inside of the vertical pipe 10 in a film-like shape. During the flow, the solvent will be heated and evaporated, and flow out from the solvent vapor outlet 5, and the solvent that has not formed vapor will enter the liquid collecting chamber 6.
[0019] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".
[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A falling film evaporator, comprising a tank body (8), wherein the upper and lower ends of the tank body (8) are respectively connected to a top distributor (9) and a liquid collecting chamber (6), wherein: The upper and lower ends of the interior of the tank body (8) are respectively fixedly mounted with supporting plates, a plurality of vertical pipes (10) are fixedly mounted between a pair of the supporting plates, the upper and lower ends of the plurality of vertical pipes (10) are respectively connected to the top distributor (9) and the liquid collecting chamber (6), a pair of solvent input ports (1) are provided at the upper end of the top distributor (9), and a liquid return port (7) and a solvent vapor outlet (5) are respectively provided at the lower end and the side wall of the liquid collecting chamber (6).
2. A falling film evaporator according to claim 1, characterized in that: A heat transfer oil outlet (2) and a heat transfer oil inlet (4) are respectively provided at the upper and lower ends of the side wall of the tank body (8).
3. A falling film evaporator according to claim 1, characterized in that: The tank body (8) is provided with an expansion joint (3).