A multi-stage distribution falling film heat exchanger
Patent Information
- Application Number
- CN202522601112.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-08
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-08
AI Technical Summary
Existing heat exchangers suffer from uneven liquid distribution, inconvenient maintenance, and poor corrosion resistance, which affect heat exchange efficiency and equipment lifespan.
A multi-stage distribution falling film heat exchanger was designed, which adopts a distribution component and maintenance door structure to ensure uniform liquid distribution and facilitate maintenance. The outer shell and distribution plate are locked together by positioning bolts, and an anti-corrosion layer is provided at the middle end.
It improves heat exchange efficiency, reduces equipment downtime, enhances equipment reliability and service life, and ensures the stability and corrosion resistance of distribution components.
Smart Images
Figure CN224933277U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat exchanger technical field, concretely relates to a multistage distribution formula falling film heat exchanger. BACKGROUND
[0002] At present, heat exchange device mainly divides into two kinds of column pipe heat exchanger and plate heat exchanger, and under the condition of same flow resistance and pump power consumption, the heat transfer coefficient of plate heat exchanger is three to five times higher than column pipe cooler, and column pipe heat exchanger mainly has the shortcomings of large floor area, complicated production, not easy to clean, large heat loss, small capacity and easy scaling.
[0003] The traditional falling film heat exchanger can have the problem of uneven liquid distribution, which leads to inconsistent liquid film thickness on the surface of some heat exchange tubes, affecting the heat exchange efficiency. In addition, the maintenance and repair of the equipment can not be convenient, and some parts of the equipment can be damaged during long-term use. If it cannot be repaired in time, it will affect the normal operation of the whole heat exchanger. Moreover, some heat exchangers perform poorly in terms of corrosion resistance, and in some corrosive environments, the service life of the equipment will be affected, so a multistage distribution formula falling film heat exchanger is needed to solve this problem. SUMMARY
[0004] The utility model aims at providing a multistage distribution formula falling film heat exchanger to solve the problems raised in the background.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a multistage distribution formula falling film heat exchanger, comprising a lower end, a middle end fixedly installed on the lower end, an upper end fixedly installed on the middle end, a heating steam pipe provided in the upper end, and the heating steam pipe is communicated with the heat exchanger main body at the bottom end, the heat exchanger main body is in the middle end, a distribution assembly is provided on the upper end of the heat exchanger main body, a distribution liquid storage tank is communicated with the liquid inlet pipe, and a maintenance door is installed on the front of the middle end.
[0006] As a preferred technical scheme of the utility model, a shell is installed on the distribution assembly, a distribution plate is sleeved on the bottom end of the shell, a plurality of distribution grooves with holes are formed in the distribution plate, and the distribution grooves are at the top end of the heat exchanger main body.
[0007] As a preferred technical scheme of the utility model, protruding blocks are fixedly installed on both sides of the shell, positioning holes are formed in the distribution plate and the protruding blocks, and the positioning holes are locked by positioning bolts.
[0008] As a preferred technical scheme of the utility model, a liquid outlet is formed in the bottom end of the lower end, and a condensate water pipe is communicated with the bottom end of the heat exchanger main body.
[0009] As the preferred technical scheme of the utility model, the access door and the middle end part are rotatably connected through a movable shaft, a handle is fixedly installed on the front surface of the access door, and a sealing ring for sealing effect is arranged between the access door and the middle end part.
[0010] As the preferred technical scheme of the utility model, the upper end part is provided with a secondary steam interface, and the secondary steam interface is in communication with the heat exchanger body of the middle end part.
[0011] As the preferred technical scheme of the utility model, the middle end part is provided with a corrosion-resistant layer, and the thickness of the corrosion-resistant layer is 0.25 mm.
[0012] Compared with the prior art, the utility model has the following beneficial effects: (1) The utility model discloses a multistage distribution type falling film heat exchanger, liquid can be evenly distributed to the surface of the heat exchanger body through the design of the distribution assembly of the falling film heat exchanger, a uniform liquid film is formed, liquid and heated steam are fully contacted, the heat exchange efficiency is improved, the working performance of the whole heat exchanger is improved, the access door installed on the middle end part is designed, the maintenance and repair of the key components of the heat exchanger body are facilitated, the downtime of equipment is reduced, the reliability and service life of equipment are improved, the distribution plate and the shell are locked through positioning bolts, the installation stability of the distribution assembly is ensured, and the liquid distribution effect is not affected due to loosening of components during operation. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the drawings without creative labor for those skilled in the art.
[0014] Figure 1 It is a structure schematic view of a multistage distribution type falling film heat exchanger according to the utility model embodiment. Figure 2 It is a structure schematic view of a distribution assembly of a multistage distribution type falling film heat exchanger according to the utility model embodiment. Figure 3 It is a front view of a middle end part of a multistage distribution type falling film heat exchanger according to the utility model embodiment.
[0015] Reference signs: 1, lower end; 2, liquid outlet; 3, middle end; 4, corrosion protection layer; 5, heat exchanger main body; 6, heating steam pipe; 7, shell; 8, distribution liquid storage tank; 9, liquid inlet pipe; 10, upper end; 11, secondary steam interface; 12, condensate pipe; 13, protruding block; 14, positioning bolt; 15, distribution plate; 16, distribution groove; 17, positioning hole; 18, access door; 19, handle; 20, movable shaft; 21, sealing ring. DETAILED DESCRIPTION
[0016] The utility model will be described further in conjunction with the drawings and specific embodiments:
[0017] Example 1
[0018] Reference Figure 1 And Figure 3 The example 1 is explained, including lower end 1, the middle end 3 is fixedly installed on the upper end of the lower end 1, the upper end 10 is fixedly installed on the upper end of the middle end 3, the heating steam pipe 6 is arranged in the upper end 10, and the bottom end of the heating steam pipe 6 is communicated with the heat exchanger main body 5, the heat exchanger main body 5 is in the middle end 3, the distribution assembly is arranged on the upper end of the heat exchanger main body 5, the distribution assembly is communicated with the distribution liquid storage tank 8 on the upper end, and the distribution liquid storage tank 8 is communicated with the liquid inlet pipe 9, the access door 18 is installed on the front of the middle end 3, the liquid outlet 2 is arranged at the bottom end of the lower end 1, the condensate pipe 12 is communicated with the bottom end of the heat exchanger main body 5, the access door 18 and the middle end 3 are rotatably connected through the movable shaft 20, the handle 19 is fixedly installed on the front of the access door 18, the sealing ring 21 for sealing effect is arranged between the access door 18 and the middle end 3, the secondary steam interface 11 is arranged on one side of the upper end 10, and the secondary steam interface 11 is communicated with the heat exchanger main body 5 of the middle end 3, the corrosion protection layer 4 is arranged on the surface of the middle end 3, and the thickness of the corrosion protection layer 4 is 0.25mm; In the embodiment, the access door 18 is installed on the front of the middle end 3, so that the heat exchanger main body 5 components in the middle end 3 can be conveniently overhauled and maintained.
[0019] Example 2
[0020] Reference Figure 2 The example 2 is explained, and the embodiment is further explained to the example 1, including distribution assembly, the shell 7 is installed on the distribution assembly, the distribution plate 15 is sleeved with the distribution plate 15 on the bottom end of the shell 7, a plurality of distribution grooves 16 with openings are arranged in the distribution plate 15, and the distribution grooves 16 are arranged at the top end of the heat exchanger main body 5, the protruding blocks 13 are fixedly installed on both sides of the shell 7, the positioning holes 17 are arranged on the distribution plate 15 and the protruding blocks 13, and the positioning holes 17 are locked through the positioning bolts 14; In this embodiment, the liquid is introduced into the distribution tank 8 through the liquid inlet pipe 9, and then is evenly distributed to the heat exchanger body 5 through the distribution assembly, so that a uniform liquid film is formed on the surface of the heat exchanger body 5, and the heat exchange efficiency is improved.
[0021] In specific applications, the distribution assembly is provided with a shell 7, the bottom end of the shell 7 is sleeved with a distribution plate 15, a plurality of distribution grooves 16 are formed in the distribution plate 15, and the distribution grooves 16 are located at the top end of the heat exchanger body 5. The shell 7 is fixedly installed with a protruding block 13 on both sides, the distribution plate 15 and the protruding block 13 are provided with positioning holes 17, and the distribution plate 15 and the shell 7 are locked and fixed by positioning bolts 14. Such design makes the installation of the distribution assembly firm, and facilitates disassembly and replacement. When the liquid enters the distribution tank 8, it will flow evenly to the surface of the heat exchanger body 5 through the distribution grooves 16 on the distribution plate 15. The liquid enters the distribution tank 8 from the liquid inlet pipe 9, and is distributed to the surface of the heat exchanger body 5 through the distribution assembly to form a liquid film. The heating steam pipe 6 provides heat to the heat exchanger body 5, so that the liquid film exchanges heat with the steam. The liquid after heat exchange flows out from the liquid outlet 2 at the bottom end of the lower end part 1, and the condensed steam is discharged through the condensate pipe 12. The secondary steam interface 11 is provided on one side of the upper end part 10 and is in communication with the heat exchanger body 5 of the middle end part 3, which is used to discharge the secondary steam generated in the heat exchange process. The access door 18 is rotatably connected to the middle end part 3 through the movable shaft 20, the handle 19 is fixedly installed on the front surface of the access door 18, and the access door 18 can be opened by pulling the handle 19. The sealing ring 21 is provided between the access door 18 and the middle end part 3 to achieve a sealing effect, which ensures the sealing property during normal operation and prevents heat and liquid leakage. When maintenance is needed, the access door 18 is opened to check and maintain the components in the middle end part 3.
[0022] In the description of the utility model, it is necessary to explain that the terms "top", "bottom", "one side", "the other side", "front", "back", "intermediate position", "interior", "top end", "bottom end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0023] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A multi-stage distribution type falling film heat exchanger, characterized in that, Includes a lower end (1), a middle end (3) is fixedly installed on the upper end of the lower end (1), an upper end (10) is fixedly installed on the upper end of the middle end (3), a heating steam pipe (6) is provided in the upper end (10), and the bottom end of the heating steam pipe (6) is connected to the heat exchanger body (5), the heat exchanger body (5) is located in the middle end (3), a distribution component is provided on the upper end of the heat exchanger body (5), a distribution storage tank (8) is connected on the upper end of the distribution component, and the distribution storage tank (8) is connected to the inlet pipe (9), and an inspection door (18) is installed on the front of the middle end (3).
2. The multi-stage distribution falling film heat exchanger according to claim 1, characterized in that, The distribution assembly is equipped with a housing (7), and a distribution plate (15) is sleeved on the bottom of the housing (7). The distribution plate (15) has multiple openings in the distribution groove (16), and the distribution groove (16) is located at the top of the heat exchanger body (5).
3. A multi-stage distribution falling film heat exchanger according to claim 2, characterized in that, The outer shell (7) has protrusions (13) fixedly installed on both sides. The distribution plate (15) and the protrusions (13) have positioning holes (17), and the positioning holes (17) are locked by positioning bolts (14).
4. A multi-stage distribution falling film heat exchanger according to claim 1, characterized in that, The lower end (1) has a liquid outlet (2) at the bottom, and the heat exchanger body (5) is connected to a condensate pipe (12) at the bottom.
5. A multi-stage distribution falling film heat exchanger according to claim 1, characterized in that, The inspection door (18) and the middle end (3) are rotatably connected by a movable shaft (20). A handle (19) is fixedly installed on the front of the inspection door (18). A sealing ring (21) is provided between the inspection door (18) and the middle end (3) to achieve a sealing effect.
6. A multi-stage distribution falling film heat exchanger according to claim 1, characterized in that, A secondary steam inlet (11) is provided on one side of the upper end (10), and the secondary steam inlet (11) is connected to the heat exchanger body (5) of the middle end (3).
7. A multi-stage distribution falling film heat exchanger according to claim 1, characterized in that, The middle end (3) is provided with an anti-corrosion layer (4) with a thickness of 0.25 mm.