Plate-type air preheater

Abstract

The utility model provides a plate-type air preheater which comprises a plurality of plate-type preheating main bodies, a three-way pipe is arranged between each plate-type preheating main body and the adjacent plate-type preheating main body, a corrugated metal sheet is arranged on one side of each plate-type preheating main body, and a first connecting plate and a second connecting plate are arranged above and below each corrugated metal sheet respectively. The plate-type preheating device has the advantages that the plate-type preheating device has a good air preheating effect, air drying is achieved, energy consumption is reduced, air serves as cold fluid to flow in the plate-type preheating body, high-temperature waste gas serves as hot fluid to flow outside the plate-type preheating body, the corrugated design of the corrugated metal sheets can increase the heat transfer area, and the heat transfer efficiency is improved. And in addition, the hot fluid can generate disturbance in a channel formed by the zigzag corrugated metal sheets so as to increase the convective heat exchange effect, and the cold fluid absorbs heat transferred by the corrugated metal sheets so as to achieve the purposes of heat exchange and preheating.

Description

Technical Field

[0001] The utility model belongs to the technical field of air preheaters, and particularly relates to a plate - type air preheater. Background Technique

[0002] Plate - type air preheaters are currently widely used in the flue gas waste heat recovery system of petrochemical tubular heaters. They have the advantages of compact volume, simple structure, low manufacturing cost, etc., but their heat transfer efficiency is generally average.

[0003] At present, plate - type preheaters are suitable for the heat exchange process between flue gas and air. Some plate - type air preheaters only consider the high heat transfer coefficient, while ignoring the assembly problems and ash deposition problems, thus affecting the use effect.

[0004] Therefore, in view of the deficiencies of the above - mentioned solutions in actual production and implementation, they are corrected and improved. At the same time, in the spirit of pursuing excellence and with the assistance of professional knowledge and experience, and after various ingenious ideas and tests, the present utility model is created. A plate - type air preheater is provided to solve the above - mentioned problems. Content of the Utility Model

[0005] The utility model provides a plate - type air preheater, which solves the problems in the prior art.

[0006] The technical solution of the utility model is realized as follows: A plate - type air preheater includes: a plurality of plate - type preheating bodies. A tee - shaped pipe is arranged between the plate - type preheating body and the adjacent plate - type preheating body. A corrugated metal sheet is arranged on one side of the plate - type preheating body, and a first connecting plate and a second connecting plate are respectively arranged above and below the corrugated metal sheet.

[0007] As a preferred embodiment of the plate - type air preheater, threaded holes are arranged near the top on both sides of the plate - type preheating body. The output end of the tee - shaped pipe is threadedly fitted into the threaded holes. The interior of the plate - type preheating body is hollow and is in communication with the tee - shaped pipe.

[0008] As a preferred embodiment of the plate - type air preheater, an exhaust pipe is arranged near the bottom at one end of the plate - type preheating body.

[0009] Adopting the above - mentioned scheme, air flows in through the input end of the tee - shaped pipe and flows out from the exhaust pipe. As a cold fluid, air will flow in the parallel channels of the hot fluid, thereby absorbing the heat transferred by the corrugated metal sheet to achieve the purpose of heat exchange and preheating.

[0010] As a preferred embodiment of the plate - type air preheater, sliders are arranged at both ends of the first connecting plate. First chutes are arranged near the top on both sides of the plate - type preheating body. The sliders are slidably fitted in the first chutes, and the shape of the sliders matches the shape of the first chutes.

[0011] As a preferred embodiment of the plate - type air preheater, sliders are provided at both ends of the second connecting plate, second chutes are provided near the bottom on both sides of the plate - type preheating main body, the sliders are slidably engaged in the second chutes, and the shape of the sliders matches the shape of the second chutes.

[0012] Adopting the above - mentioned solution, the first connecting plate and the second connecting plate are used to realize the connection and cooperation between the plate - type preheating main body and the adjacent plate - type preheating main body. The connection and cooperation operation is simple and easy to disassemble.

[0013] As a preferred embodiment of the plate - type air preheater, the corrugated metal sheets on the plate - type preheating main body and the corrugated metal sheets on the adjacent plate - type preheating main body are arranged in a mirror image and there is a gap.

[0014] As a preferred embodiment of the plate - type air preheater, the corrugated metal sheets are fixed to the plate - type preheating main body by welding technology or bolts.

[0015] Adopting the above - mentioned solution, the corrugated design of the corrugated metal sheets can increase the heat transfer area, and can make the hot fluid generate disturbances in the channels formed by the zigzag corrugated metal sheets to increase the effect of convective heat transfer.

[0016] After adopting the above - mentioned technical solution, the beneficial effect of the present utility model is that this device has a good air preheating effect, achieves the drying of air, and thus reduces energy consumption.

[0017] Air flows as a cold fluid inside the plate - type preheating main body, and high - temperature waste gas flows as a hot fluid outside the plate - type preheating main body. Among them, the corrugated design of the corrugated metal sheets can increase the heat transfer area, and can make the hot fluid generate disturbances in the channels formed by the zigzag corrugated metal sheets to increase the effect of convective heat transfer. The cold fluid absorbs the heat transferred by the corrugated metal sheets to achieve the purpose of heat exchange and preheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a side view of the structure of the plate - type air preheater of the present utility model;

[0020] Figure 2 It is a top view of the structure of the plate - type air preheater of the present utility model;

[0021] Figure 3 This is the bottom view of the plate - type air pre - heater structure of the present utility model;

[0022] Figure 4 This is a schematic diagram of the cooperation relationship among the plate - type pre - heater main body, the three - way pipe, the first connecting plate, and the corrugated metal sheet of the present utility model;

[0023] In the figure, 1 - plate - type pre - heater main body; 2 - threaded hole; 3 - three - way pipe; 4 - first chute; 5 - second chute; 6 - first connecting plate, 7 - second connecting plate; 8 - corrugated metal sheet; 9 - exhaust pipe. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0025] As Figures 1-4 shown, a plate - type air pre - heater includes: a plurality of plate - type pre - heater main bodies 1. A three - way pipe 3 is arranged between adjacent plate - type pre - heater main bodies 1. A corrugated metal sheet 8 is arranged on one side of the plate - type pre - heater main body 1. A first connecting plate 6 and a second connecting plate 7 are respectively arranged above and below the corrugated metal sheet 8.

[0026] Among them, threaded holes 2 are arranged near the top on both sides of the plate - type pre - heater main body 1. The output end of the three - way pipe 3 is in threaded fit with the threaded holes 2. The inside of the plate - type pre - heater main body 1 is hollow and communicates with the three - way pipe 3.

[0027] Among them, an exhaust pipe 9 is arranged near the bottom at one end of the plate - type pre - heater main body 1.

[0028] Further, air flows in through the input end of the three - way pipe 3 and flows out from the exhaust pipe 9. As a cold fluid, air will flow in the parallel channels of the hot fluid, thereby absorbing the heat transferred by the corrugated metal sheet 8 to achieve the purpose of heat exchange and pre - heating.

[0029] Among them, sliders are arranged at both ends of the first connecting plate 6. First chutes 4 are arranged near the top on both sides of the plate - type pre - heater main body 1. The sliders are slidably fitted in the first chutes 4, and the shape of the sliders matches the shape of the first chutes 4.

[0030] Among them, sliders are arranged at both ends of the second connecting plate 7. Second chutes 5 are arranged near the bottom on both sides of the plate - type pre - heater main body 1. The sliders are slidably fitted in the second chutes 5, and the shape of the sliders matches the shape of the second chutes 5.

[0031] Among them, the corrugated metal sheets 8 on the plate-type preheater main body 1 are arranged in a mirror image with the corrugated metal sheets 8 on the adjacent plate-type preheater main body 1, and there is a gap.

[0032] Among them, the corrugated metal sheets 8 are fixed to the plate-type preheater main body 1 by welding technology or bolts.

[0033] Furthermore, the corrugated design of the corrugated metal sheets 8 can increase the heat transfer area and enable the hot fluid to generate disturbances in the channels formed by the zigzag corrugated metal sheets 8 to enhance the effect of convective heat transfer.

[0034] Working principle: Air, as the cold fluid, flows inside the plate-type preheater main body 1, and high-temperature waste gas, as the hot fluid, flows outside the plate-type preheater main body 1. The corrugated design of the corrugated metal sheets 8 can increase the heat transfer area and enable the hot fluid to generate disturbances in the channels formed by the zigzag corrugated metal sheets, so as to enhance the effect of convective heat transfer. The cold fluid absorbs the heat transferred by the corrugated metal sheets 8 to achieve the purpose of heat exchange and preheating.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A plate type air preheater, characterized in that: include: A plurality of plate-type preheating bodies (1), wherein a three-way pipe (3) is arranged between the plate-type preheating bodies (1) and adjacent plate-type preheating bodies (1), a corrugated metal sheet (8) is arranged on one side of the plate-type preheating body (1), and a first connecting plate (6) and a second connecting plate (7) are respectively arranged above and below the corrugated metal sheet (8).

2. A plate type air preheater according to claim 1, characterized in that: Threaded holes (2) are provided near the top of both sides of the plate-type preheating body (1), and the output end of the three-way pipe (3) is threadedly engaged in the threaded holes (2). The plate-type preheating body (1) is hollow inside and is connected to the three-way pipe (3).

3. A plate type air preheater according to claim 1, characterized in that: An exhaust pipe (9) is provided near the bottom of one end of the plate-type preheating body (1).

4. A plate type air preheater according to claim 1, characterized in that: Slide blocks are provided at both ends of the first connecting plate (6), first slide grooves (4) are provided near the top of both sides of the plate-type preheating body (1), the slide blocks are slidably fitted in the first slide grooves (4), and the shape of the slide blocks matches the shape of the first slide grooves (4).

5. The plate type air preheater according to claim 1, characterized in that: Slide blocks are provided at both ends of the second connecting plate (7), and second slide grooves (5) are provided near the bottom of both sides of the plate-type preheating body (1). The slide blocks are slidably fitted in the second slide grooves (5), and the shape of the slide blocks matches the shape of the second slide grooves (5).

6. A plate type air preheater according to claim 1, characterized in that: The corrugated metal sheet (8) on the plate-type preheating body (1) is arranged in a mirror image with the corrugated metal sheet (8) on the adjacent plate-type preheating body (1), and there is a gap.

7. The plate type air preheater according to claim 1, characterized in that: The corrugated metal sheet (8) is fixed to the plate-type preheating body (1) by welding technology or bolts.

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