Plate side anti-impact protection structure of vertical plate heat exchanger
By designing the structure of the upper and lower anti-impact plates and the interlaced oblong holes combined with the fixed-distance tube at the plate inlet end of the heat exchanger, the anti-impact plates cannot effectively prevent weld erosion and fluid distribution in the prior art. The problem of unevenness achieves complete anti-shooting and uniform distribution of the welds at the imported end of the plate, improving the efficiency and life of the heat exchanger.
Patent Information
- Application Number
- CN202420920924.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-29
AI Technical Summary
In existing heat exchangers, the simple setting of the anti-impact plate at the tube box cannot effectively prevent the fluid from eroding the welds at the end of the plate through the baffle round hole, resulting in a reduced heat exchange efficiency and difficulty in achieving uniform distribution of the fluid.
Design a plate-inlet weld anti-impact protection structure for vertical plate heat exchangers, adopting upper and lower anti-impact plates and interlaced oblong distribution holes, combining fixed-distance tubes and removable connecting plates to ensure uniform fluid Distribute and prevent weld erosion.
It achieves complete anti-shooting of welds at the inlet end of the plate, improves the uniformity of fluid distribution, and extends the service life and heat transfer efficiency of the heat exchanger.
Smart Images
Figure CN222257887U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heat exchanger tube side anti-impact, and relates to a vertical plate heat exchanger plate side anti-impact protection structure. Background Art
[0002] Heat exchangers are common equipment in chemical, petroleum, power, food and many other industrial sectors, and they occupy an important position in production. As a key auxiliary component of heat exchangers, anti-collision plates play a very important role in heat exchangers. Since the shell-side medium is usually a corrosive gas or a liquid with a high flow rate, if an anti-collision plate is not set near the shell-side inlet for protection, the gas will directly impact the heat exchange tube, which will not only corrode the heat exchange tube but also cause the heat exchange tube to vibrate strongly, affecting the life of the heat exchanger. Therefore, most of the anti-collision plates in the prior art are fixed at the shell-side pipe connection. There is no pipe box anti-collision structure in the literature. In actual production, a baffle is simply set at the pipe box, and a circular hole is opened on the baffle. Although this pipe box anti-collision structure has a certain anti-collision function, some fluids will still erode the welds at the end of the plate through the circular holes of the baffle, thereby causing the heat exchanger to fail. In addition, this anti-collision structure easily causes uneven distribution of fluid at the pipe box inlet, resulting in reduced heat transfer efficiency of the heat exchanger.
[0003] When the fluid enters the heat exchanger tube box inlet axially and is a two-phase or three-phase flow, it is usually necessary to set a tube side anti-collision structure at the tube side inlet. Utility Model Content
[0004] The utility model provides a plate side inlet end weld anti-impact protection structure for a vertical plate heat exchanger, which can achieve complete anti-impact of the plate side inlet end weld and uniform distribution of the plate side inlet fluid.
[0005] The technical solution adopted by this utility model:
[0006] A plate-side anti-collision protection structure for a vertical plate heat exchanger comprises a shell, a tube sheet and an inlet connecting section are sequentially installed at the end of the shell, a heat exchange plate bundle is installed on the tube sheet, a tube box connecting section is installed between the tube sheet and the inlet connecting section, and the plate-side anti-collision protection structure is detachably installed on the inner wall of the tube box connecting section; the plate-side anti-collision protection structure comprises an upper anti-collision plate and a lower anti-collision plate, and the upper anti-collision plate and the lower anti-collision plate are respectively provided with a first oblong distribution hole and a second oblong distribution hole, and the first oblong distribution hole and the second oblong distribution hole are arranged alternately.
[0007] The opening direction of the first oblong distribution holes and the second oblong distribution holes is the same as the direction of the inlet end seam of the plate end of the plate bundle.
[0008] A distance tube is provided between the upper anti-collision plate and the lower anti-collision plate, and the length of the distance tube is 80-100 mm.
[0009] A connecting plate is installed on the inner wall of the pipe box connecting section, and the connecting plate and the upper anti-collision plate are detachably connected through connecting plate fastening bolts and nuts; the upper anti-collision plate and the lower anti-collision plate are detachably connected through anti-collision plate fastening bolts and nuts.
[0010] The inlet connecting section and the installation pipe box connecting section are detachably connected via a flange.
[0011] The utility model is a protective structure for preventing the plate inlet end weld from impacting a vertical plate heat exchanger, which can achieve complete impact prevention of the plate inlet end weld and uniform distribution of the plate inlet fluid. The anti-impact protective structure is detachable and the plate inlet end weld can be inspected. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the overall connection structure of the utility model;
[0013] Figure 2 It is a schematic diagram of the parts of the utility model;
[0014] Figure 3 It is a schematic diagram of the parts of the utility model;
[0015] Figure 4 This is a schematic diagram of the connection of parts of the utility model;
[0016] Figure 5 This is a schematic diagram of the connection between the utility model and the heat exchanger tube box;
[0017] Numbers in the figure:
[0018] Pipe box inlet 1, inlet connecting section 2, pipe box flange 3, pipe box corresponding flange 4, pipe box connecting section 5, tube sheet 6, shell 7, upper anti-collision plate 8, connecting plate 9, lower anti-collision plate 10, heat exchange plate bundle 11, connecting screw hole 12, connecting screw hole 13, first oblong distribution hole 14, anti-collision plate fastening bolt 15, anti-collision plate nut 16, distance pipe 17, connecting plate fastening bolt 18, connecting plate nut 19, connecting screw hole 20, second oblong distribution hole 21. DETAILED DESCRIPTION
[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0020] See also Figure 1 , 23, 4, 5, a plate-side anti-impact protection structure for a vertical plate heat exchanger, comprising a shell, a tube sheet 6, an inlet connection section 2, and a heat exchange plate bundle 11 installed on the tube sheet in sequence at the end of the shell, a tube box connection section 5 installed between the tube sheet 6 and the inlet connection section 2, and a plate-side anti-impact protection structure detachably installed on the inner wall of the tube box connection section 5; the plate-side anti-impact protection structure comprises an upper anti-impact plate 8 and a lower anti-impact plate 10, and the upper anti-impact plate 8 and the lower anti-impact plate 10 are respectively provided with a first oblong distribution hole 14 and a second oblong distribution hole 21, and the first oblong distribution hole 14 and the second oblong distribution hole 21 are arranged alternately. This structural arrangement can ensure that: when solid particles are contained in the axial fluid at the inlet of the tube box, some of the solid particles can reduce their kinetic energy by impacting the upper anti-impact plate 8, and the remaining solid particles can reduce their kinetic energy by impacting the lower anti-impact plate 10, thereby completely avoiding the erosion damage of the weld at the end of the plate bundle by the solid particles.
[0021] The opening direction of the first oblong distribution hole 14 and the second oblong distribution hole 21 is the same as the direction of the end seam of the plate path end inlet of the plate bundle. Since the plate path end is generally a rectangular plate path inlet structure, the oblong distribution holes are arranged corresponding to the rectangular plate path inlet, which reduces the plate path inlet resistance while realizing the secondary distribution of the plate path fluid, and the fluid distribution is more uniform than the conventional primary distribution.
[0022] A distance tube 17 with a length of 80-100 mm is provided between the upper and lower anti-collision plates 8 and 10 to ensure that there is a gap of 80-100 mm between the upper and lower anti-collision plates to prevent solid particles from being deposited between the upper and lower anti-collision plates due to the small gap between the upper and lower anti-collision plates, thereby blocking the fluid channel.
[0023] A connecting plate 9 is installed on the inner wall of the pipe box connecting section 5, and the connecting plate 9 and the upper anti-collision plate 8 are detachably connected through the connecting plate fastening bolts and nuts 19 and 20. This structure solves the connection and fixing problem of the utility model with the heat exchanger body, and fully considers the disassembly and repairability of the utility model. The upper anti-collision plate 8 and the lower anti-collision plate 10 are detachably connected through the anti-collision plate fastening bolts and nuts 15 and 16, and this structure solves the problem of connection and positioning of the lower anti-collision plate 10.
[0024] The inlet connection section 2 and the installation pipe box connection section 5 are detachably connected via flanges. The portion where the inlet connection section 2 and the installation pipe box connection section 5 are connected is provided with a pipe box flange 3 and a pipe box corresponding flange 4; when inspecting the plate side anti-collision structure, the pipe box flange 3 can be disassembled; when inspecting the plate side end weld, while disassembling the pipe box flange 3, the connection plate fastening bolts and nuts 18 and 19 are disassembled, and the plate side anti-collision structure can be removed.
Claims
1. A plate-side anti-impact protection structure for a vertical plate heat exchanger, comprising a shell, a tube sheet mounted on the end of the shell, an inlet connecting section, and a heat exchange plate bundle mounted on the tube sheet, characterized in that: A tube box connecting section (5) is installed between the tube sheet (6) and the inlet connecting section (2), and a plate-side anti-collision protection structure is detachably installed on the inner wall of the tube box connecting section (5); the plate-side anti-collision protection structure comprises an upper anti-collision plate (8) and a lower anti-collision plate (10), and the upper anti-collision plate (8) and the lower anti-collision plate (10) are respectively provided with first oblong distribution holes (14) and second oblong distribution holes (21), and the first oblong distribution holes (14) and the second oblong distribution holes (21) are arranged in a staggered manner.
2. A vertical plate heat exchanger plate side anti-impact protection structure as claimed in claim 1, characterized in that: The opening direction of the first oblong distribution holes (14) and the second oblong distribution holes (21) is the same as the direction of the inlet end seam of the plate end of the plate bundle.
3. A plate-side anti-impact protection structure for a vertical plate heat exchanger according to claim 1, characterized in that: A distance tube (17) is provided between the upper anti-collision plate (8) and the lower anti-collision plate (10), and the length of the distance tube (17) is 80-100 mm.
4. A plate-side anti-impact protection structure for a vertical plate heat exchanger according to claim 1, characterized in that: A connecting plate (9) is installed on the inner wall of the pipe box connecting section (5); the connecting plate (9) and the upper anti-collision plate (8) are detachably connected via connecting plate fastening bolts and nuts; and the upper anti-collision plate (8) and the lower anti-collision plate (10) are detachably connected via anti-collision plate fastening bolts and nuts.
5. The plate-side anti-impact protection structure of a vertical plate heat exchanger according to claim 1, characterized in that: The inlet connection section (2) and the installation pipe box connection section (5) are detachably connected via a flange.