Plate type anti-blocking heat exchanger

Abstract

The utility model discloses a plate type anti-blocking heat exchanger. The plate type anti-blocking heat exchanger comprises a heat exchanger body and a mechanical descaling device. The heat exchanger body comprises a fixed plate and an end plate which are oppositely arranged, a plurality of groups of heat exchange units which are arranged in parallel at intervals are arranged between the fixed plate and the end plate, a liquid medium inlet and a liquid medium outlet are formed in the end plate, and a gas medium outlet and a gas medium inlet are formed in the fixed plate; the mechanical descaling devices are divided into a plurality of groups with the same structure, each group comprises a scraper blade assembly, a rotating shaft and a hand wheel, the rotating shaft penetrates through the fixed plate, the heat exchange unit and the end plate, the plurality of scraper blade assemblies are distributed in parallel at intervals and connected to the rotating shaft, and each scraper blade assembly comprises a flat rigid scraper blade and a rubber strip arranged on the outer side of the scraper blade; the scraper blade assemblies and the heat exchange units are alternately mounted; the hand wheel is arranged on the outer side of the end plate and connected with the rotating shaft. Online cleaning can be achieved, disassembly and waiting are not needed, simplicity and convenience are achieved, the maintenance efficiency is improved, and the maintenance cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a plate-type anti-clogging heat exchanger. Background Technology

[0002] In the petroleum, metallurgical, and ceramics industries, the exhaust gas temperature of heating furnaces is high, and the flue gas carries a large amount of heat and is released into the air, resulting in a significant waste of heat. The waste heat of the flue gas is generally recovered by heating other media through heat exchangers. Currently, the main types are finned tube heat exchangers, shell-and-tube heat exchangers, and plate heat exchangers. In the oil extraction and transportation stage, the exhaust gas from heating furnaces is mainly used to heat crude oil or oily wastewater. These media often have complex compositions, containing a large amount of sulfates or carbonates such as barium, strontium, magnesium, and calcium, as well as substances such as paraffin and polymers. When these media come into contact with the wall surface during heat exchange, they easily condense and adsorb onto the surface. Over time, these substances continue to precipitate and adhere to the wall surface, forming scale. The longer the contact time, the easier it is for scale to form. If it is not cleaned in time, the scale layer will gradually thicken, increasing thermal resistance, leading to a decrease in heat transfer performance, reduced heat exchanger efficiency, and affecting production and daily life.

[0003] Current conventional descaling methods include online cleaning, chemical dosing, and manual disassembly for mechanical descaling. These methods have limited effectiveness and high maintenance costs, leading to poor equipment reliability, shortened maintenance cycles, high operating costs, and reduced economic efficiency. Therefore, it is necessary to propose a plate-type anti-clogging heat exchanger to solve these problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a plate-type anti-clogging heat exchanger, thereby solving the problems of limited effectiveness and high maintenance costs associated with existing technologies.

[0005] This utility model provides a plate-type anti-clogging heat exchanger, including: a heat exchanger body and a mechanical descaling device;

[0006] The heat exchanger body includes a fixed plate and an end plate arranged opposite to each other. An array of parallel heat exchange units is arranged between the fixed plate and the end plate. The end plate has a liquid medium inlet and a liquid medium outlet, while the fixed plate has a gas medium outlet and a gas medium inlet. The mechanical descaling device consists of several arrays with identical structures. Each array includes a scraper assembly, a rotating shaft, and a handwheel. The rotating shaft passes through the fixed plate, the heat exchange units, and the end plate. Several scraper assemblies are distributed in parallel and spaced apart and connected to the rotating shaft. Each scraper assembly includes a flat, rigid scraper and a rubber strip disposed on the outside of the scraper. The scraper assemblies are installed alternately with the heat exchange units. The handwheel is disposed on the outside of the end plate and connected to the rotating shaft.

[0007] Furthermore, the heat exchange unit includes heat exchange plates, sealing strips, short pipes, and serrated fins; two heat exchange plates are used as one heat exchange unit and are welded together. In the heat exchange unit, the serrated fins are spot-welded to one heat exchange plate, and the two heat exchange plates are welded together. The short pipe connects the two heat exchange plates by welding, and the rotating shaft passes through the short pipe.

[0008] Furthermore, mounting guide rails are provided at both ends of the fixing plate and the end plate, and the heat exchange plates are positioned at both ends by means of the mounting guide rails.

[0009] Furthermore, the edges of the fixing plate and the end plate are fixed together by a first bolt and nut.

[0010] Furthermore, each set of mechanical descaling devices also includes a fixed plate bearing seat, a fixed plate bearing, scraper fixing bolts, an end plate bearing seat, a bearing pressure plate, a second bolt, and an end plate bearing;

[0011] The fixed plate bearing seat is welded to the fixed plate, the fixed plate bearing is fixed on the fixed plate bearing seat, the rotating shaft is installed inside the fixed plate bearing, the scraper assembly is fixed on the rotating shaft by scraper fixing bolts, the end plate bearing seat is welded to the end plate, the bearing pressure plate is fixed on the end plate bearing seat by the second bolt, and the end plate bearing is fixed on the end plate bearing seat by the bearing pressure plate.

[0012] This utility model offers the following advantages: The plate-type anti-clogging heat exchanger provided by this utility model allows for online cleaning without disassembly or waiting, simplifying maintenance, improving efficiency, and saving costs. The scraper assembly uses rigid scrapers with external rubber strips to effectively prevent jamming and clean dirt effectively. The heat exchange plates are designed as heat exchange units, facilitating installation and replacement in a modular fashion, thus improving installation and maintenance efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the plate-type anti-clogging heat exchanger of this utility model;

[0015] Figure 2 This is a schematic diagram of the heat exchange unit of the plate anti-clogging heat exchanger of this utility model;

[0016] Figure 3 This is a schematic diagram of the mechanical descaling device for the plate-type anti-clogging heat exchanger of this utility model;

[0017] Figure 4 This is a schematic diagram of the scraper assembly of the plate-type anti-clogging heat exchanger of this utility model.

[0018] Illustration: 101-Liquid medium inlet; 102-Liquid medium outlet; 103-Gas medium outlet; 104-Gas medium inlet; 105-Mechanical descaling device; 106-Heat exchange unit; 107-Fixing plate; 108-End plate; 109-First bolt; 110-Nut; 111-Mounting guide rail; 1051-Fixing plate bearing seat; 1052-Fixing plate bearing; 1053-Scraper assembly; 1054-Rotating shaft; 1055-Scraper fixing bolt; 1056-End plate bearing seat; 1057-Bearing pressure plate; 1058-Second bolt; 1059-Handwheel; 1060-End plate bearing; 1061-Heat exchange plate; 1062-Sealing strip; 1063-Short pipe; 1064-Serrated fin; 10531-Scraper; 10532-Rubber strip. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be pointed out that the following detailed description is illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0020] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0021] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions has been enlarged, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0022] Please see Figures 1 to 4 This utility model provides a plate-type anti-clogging heat exchanger, including: a heat exchanger body and a mechanical descaling device; the heat exchanger body includes a fixed plate 107 and an end plate 108 arranged opposite to each other, and an array of parallel heat exchange units 106 arranged between the fixed plate 107 and the end plate 108; a liquid medium inlet 101 is provided below one end of the end plate 108, and a liquid medium outlet 102 is provided above the other end. The liquid medium inlet 101 and the liquid medium outlet 102 are connected. A gas medium outlet 103 is provided above one end of the fixed plate 107, and a gas medium inlet 104 is provided below the other end. The gas medium outlet 103 and the gas medium inlet 104 are connected.

[0023] The mechanical descaling device consists of several identical arrays. Each array includes a scraper assembly 1053, a rotating shaft 1054, and a handwheel 1059. The rotating shaft 1054 passes through a fixed plate 107, a heat exchange unit 106, and an end plate 108. Several scraper assemblies 1053 are distributed in parallel and spaced apart, and connected to the rotating shaft 1054. Each scraper assembly 1053 includes a flat, rigid scraper 10531 and a rubber strip 10532 disposed on the outside of the scraper 10531. This arrangement not only effectively cleans the scale but also prevents the scraper from deforming and jamming. The scrapers are arranged on one side to prevent them from blocking the heat exchange channels during heat exchanger operation and to avoid interference between the scrapers during descaling. The scraper assemblies 1053 and the heat exchange unit 106 are installed alternately. The handwheel 1059 is disposed on the outside of the end plate 108 and connected to the rotating shaft 1054.

[0024] Specifically, the heat exchange unit 106 includes heat exchange plates 1061, sealing strips 1062, short tubes 1063, and serrated fins 1064. Two heat exchange plates 1061 are used as one heat exchange unit 106, which is then welded together. The serrated fins 1064 are spot-welded to one heat exchange plate 1061 in the heat exchange unit 106, and the two heat exchange plates 1061 are welded together. The short tube 1063 connects the two heat exchange plates 1061 by welding, and the rotating shaft 1054 passes through the short tube 1063. This structure not only facilitates the overall assembly of the heat exchanger but also saves time and effort in scaling, enabling online scaling. This modular design facilitates installation and replacement. Mounting guide rails 111 are provided at both ends of the fixing plate 107 and the end plate 108, and the ends of the heat exchange plates 1061 are positioned using the mounting guide rails 111. The edges of the fixing plate 107 and the end plate 108 are fixed together by the first bolt 109 and the nut 110.

[0025] Specifically, each set of mechanical descaling devices also includes a fixed plate bearing seat 1051, a fixed plate bearing 1052, a scraper fixing bolt 1055, an end plate bearing seat 1056, a bearing pressure plate 1057, a second bolt 1058, and an end plate bearing 1060. The fixed plate bearing seat 1051 is welded to the fixed plate 107, the fixed plate bearing 1052 is fixed to the fixed plate bearing seat 1051, the rotating shaft 1054 is installed inside the fixed plate bearing 1052, the scraper assembly 1053 is fixed to the rotating shaft 1054 by the scraper fixing bolt 1055, the end plate bearing seat 1056 is welded to the end plate 108, the bearing pressure plate 1057 is fixed to the end plate bearing seat 1056 by the second bolt 1058, and the end plate bearing 1060 is fixed to the end plate bearing seat 1056 by the bearing pressure plate 1057.

[0026] When the heat exchanger is running, a relatively dirty liquid medium flows between the scrapers 10531, and a high-temperature gas flows inside the heat exchange unit 106. After running for a period of time, if it is determined that the heat exchanger may be fouling, the handwheel 1059 is manually turned in sequence to clean the fouling on the heat exchange plates 1061. The cleaning can be performed multiple times until the fouling is completely removed.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in sequences other than those illustrated or described herein.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A plate-type anti-clogging heat exchanger, characterized in that, include: Heat exchanger body and mechanical descaling device; The heat exchanger body includes a fixed plate (107) and an end plate (108) arranged opposite to each other. An array of parallel heat exchange units (106) are arranged between the fixed plate (107) and the end plate (108). A liquid medium inlet (101) and a liquid medium outlet (102) are provided on the end plate (108). A gas medium outlet (103) and a gas medium inlet (104) are provided on the fixed plate (107). The mechanical descaling device is divided into arrays with identical structures. Each array includes a scraper assembly (1053), a rotating shaft (1054), and a handwheel (1059). The rotating shaft (1054) passes through a fixed plate (107), a heat exchange unit (106), and an end plate (108). Several scraper assemblies (1053) are distributed in parallel and spaced apart and connected to the rotating shaft (1054). Each scraper assembly (1053) includes a flat and rigid scraper (10531) and a rubber strip (10532) disposed on the outside of the scraper (10531). The scraper assembly (1053) is installed alternately with the heat exchange unit (106). The handwheel (1059) is disposed on the outside of the end plate (108) and connected to the rotating shaft (1054).

2. A plate-type anti-clogging heat exchanger as described in claim 1, characterized in that, The heat exchange unit (106) includes heat exchange plates (1061), sealing strips (1062), short tubes (1063), and serrated fins (1064). Two heat exchange plates (1061) are used as one heat exchange unit (106) and are welded together. The serrated fins (1064) in the heat exchange unit (106) are spot-welded to one heat exchange plate (1061). The two heat exchange plates (1061) are welded together. The short tube (1063) is connected to the two heat exchange plates (1061) by welding. The rotating shaft (1054) passes through the short tube (1063).

3. A plate-type anti-clogging heat exchanger as described in claim 2, characterized in that, The fixed plate (107) and the end plate (108) are provided with mounting rails (111) at both ends, and the heat exchange plate (1061) is positioned at both ends by the mounting rails (111).

4. A plate-type anti-clogging heat exchanger as described in claim 3, characterized in that, The edges of the fixing plate (107) and the end plate (108) are fixed together by the first bolt (109) and nut (110).

5. A plate-type anti-clogging heat exchanger as described in claim 4, characterized in that, Each set of mechanical descaling devices also includes a fixed plate bearing seat (1051), a fixed plate bearing (1052), a scraper fixing bolt (1055), an end plate bearing seat (1056), a bearing pressure plate (1057), a second bolt (1058), and an end plate bearing (1060). The fixed plate bearing seat (1051) is welded to the fixed plate (107), the fixed plate bearing (1052) is fixed to the fixed plate bearing seat (1051), the rotating shaft (1054) is installed inside the fixed plate bearing (1052), the scraper assembly (1053) is fixed to the rotating shaft (1054) by the scraper fixing bolt (1055), the end plate bearing seat (1056) is welded to the end plate (108), the bearing pressure plate (1057) is fixed to the end plate bearing seat (1056) by the second bolt (1058), and the end plate bearing (1060) is fixed to the end plate bearing seat (1056) by the bearing pressure plate (1057).

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