Plate-type wide-runner enamel heat exchanger

Abstract

The utility model discloses a plate type wide runner enamel heat exchanger which comprises a machine frame, the machine frame is of a cubic frame structure, the machine frame comprises two flanges a, side plates and flanges b, the flanges a are vertically opposite, the side plates are horizontally opposite, the flanges b are horizontally opposite, perforated plates are installed between the front end opening and the rear end opening of the two side plates respectively, and a plurality of evenly-arranged through holes are formed in the perforated plates. A heat exchange plate tube is installed between every two penetrating holes which are opposite in the front-back direction, the ends of the heat exchange plate tubes are inserted into the penetrating holes in a matched mode, enamel spraying treatment is conducted on the outer surfaces of the heat exchange plate tubes, every two penetrating holes which are opposite in the front-back direction and a row of heat exchange plate tubes connected between the two penetrating holes form a heat exchange module, and a plurality of heat exchange modules are vertically installed in the machine frame. Installation flexibility is improved through modular design, the heat exchanger has the advantages of being resistant to blockage and easy to clean through wide runner design, low-temperature corrosion resistance of the heat exchanger is improved through enamel treatment, the problems of corrosion and blockage in the low-temperature flue gas recycling process are effectively solved, and heat efficiency of the heat exchanger is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a plate-type wide-flow-channel enamel heat exchanger. Background Technique

[0002] Air preheaters play a very important role in the low-temperature preheating recovery and utilization. They can not only reduce the flue gas temperature, transfer heat to the combustion-supporting air, improve the overall thermal efficiency of the combustion device, and save fuel. Therefore, many heating furnaces, power station boilers, steel-making furnaces, etc. are equipped with air preheaters in the low-temperature section of the flue to improve the thermal efficiency of the device.

[0003] At present, there are many types of air preheaters, such as regenerative rotary air preheaters, and also shell-and-tube and plate-type air preheaters of the partition wall type. The rotary air preheater has the highest efficiency, but it requires rotating dynamic equipment by itself, with high energy consumption, and the gaps between the plates of the rotary type are small, which are prone to wear and blockage, large floor area, and small application range; the heat transfer efficiency of the shell-and-tube heat exchanger is low, it requires a large installation space, and the corrosion and blockage of the pipeline result in a short product life; the plate heat exchanger is similar to the rotary air preheater, with high efficiency, narrow flow channel space but prone to blockage, and can only be used for clean gas, so there are certain limitations in its use. Content of the Utility Model

[0004] The purpose of the utility model is to provide a plate-type wide-flow-channel enamel heat exchanger to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A plate-type wide-flow-channel enamel heat exchanger, including a frame. The frame is a cubic frame structure. The frame includes two upper and lower opposite flange a, left and right opposite side plates, and front and rear opposite flange b. The flange a is a rectangular frame welded by channel steel, and the flange b is a rectangular frame welded by angle iron. Perforated plates are respectively installed between the front and rear ports of the two side plates. A number of uniformly arranged perforations are provided on the perforated plates. A heat exchange plate tube is installed between two perforations opposite to each other front and rear. The end of the heat exchange plate tube is inserted into the perforation in a matching manner. The flow cross-section of the heat exchange plate tube is flat and long. The outer surface of the heat exchange plate tube is sprayed with enamel treatment. Two perforated plates opposite to each other front and rear and a row of heat exchange plate tubes connected between the two form a heat exchange module. A plurality of heat exchange modules are vertically installed inside the frame.

[0006] Preferably, the heat exchange plate tube is welded by two heat exchange plates, and a plurality of turbulators with concave and convex intersections are provided on the side wall of the heat exchange plate tube.

[0007] Preferably, a wide flow channel of 12-16 mm is formed between two adjacent heat exchange plate tubes, and the end of the heat exchange plate tube and the perforation are sealed by gaskets.

[0008] Preferably, a plurality of baffles are vertically installed on the inner side of the flange b, and a plurality of wind holes are distributed on the baffles in a transverse arrangement. The wind holes correspond to the perforations one by one, and the end faces of the heat exchange plate tubes are against the inner side faces of the baffles.

[0009] Compared with the existing technology, the beneficial effects of the present invention are: the modular design of the present invention improves the installation flexibility, the wide flow channel design makes the heat exchanger anti-clogging and easy to clean, the enamel treatment improves its low-temperature corrosion resistance, and effectively solves the corrosion and blockage problems in the low-temperature flue gas recovery process. Moreover, the modular design facilitates disassembly and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the explosion structure of the utility model;

[0011] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle;

[0012] Figure 3 Schematic diagram of the main structure of the heat exchange plate and tube;

[0013] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] In the figure: 1. frame; 11. flange a; 12. side panel; 13. flange b; 2. heat exchange plate tube; 3. perforated plate; 4. baffle; 5. perforation; 6. air hole; 7. spoiler. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] See also Figures 1-4 The utility model provides a technical solution: a plate-type wide-channel enamel heat exchanger, including a frame 1, which is a cubic frame structure. The frame 1 includes two upper and lower opposite flanges a11, left and right opposite side plates 12, and front and back opposite flanges b13. The flange a11 is a rectangular frame welded with channel steel, and the flange b13 is a rectangular frame welded with angle iron.

[0017] Two side plates 12 are respectively installed with perforated plates 3 between the front and rear ports. A number of uniformly arranged perforations 5 are provided on the perforated plates 3. A heat exchange plate tube 2 is installed between two relatively front and rear perforations 5. The distance between two adjacent heat exchange plate tubes 2 is 12 - 16 mm to form a wide flow channel. High-temperature flue gas flows through the wide flow channel during operation, and fly ash in the flue gas is not easily accumulated and blocked between the two heat exchange plate tubes 2 (i.e., the wide flow channel). The end of the heat exchange plate tube 2 is inserted into the perforation 5 in a matching manner, and the end of the heat exchange plate tube 2 and the perforation 5 are sealed by a gasket. The gasket is made of special high-temperature resistant fluororubber. The heat exchange plate tube 2 is formed by welding two heat exchange plates. The thickness of the heat exchange plate is about 0.8 mm, and the welding distance between the two heat exchange plates is 10 - 14 mm. The side wall of the heat exchange plate tube 2 is provided with a plurality of turbulator blocks 7 with concave and convex intersections. The turbulator blocks 7 are formed by stamping on the plate, and the turbulator blocks 7 are used to increase the heat exchange efficiency between fluids.

[0018] A plurality of baffles 4 are vertically installed on the inner side of the flange b13. A number of horizontally arranged air holes 6 are distributed on the baffles 4. The air holes 6 correspond to the perforations 5 one by one, and the end face of the heat exchange plate tube 2 abuts against the inner side face of the baffle 4. The flow cross-section of the heat exchange plate tube 2 is flat and elongated. The outer surface of the heat exchange plate tube 2 is sprayed with enamel. Two relatively front and rear perforated plates 3 and a row of heat exchange plate tubes 2 connected between them form a heat exchange module. A plurality of heat exchange modules are vertically installed inside the frame 1. The modular design facilitates the disassembly and cleaning of the ash accumulation in the wide flow channel.

[0019] Working principle: High-temperature flue gas enters from one flange a11, flows through the wide flow channel between the heat exchange plate tubes 2 and is output from the other flange a11. Combustion-supporting air enters from one flange b13, and cold air is heated by passing through each heat exchange plate tube 2 and is output from the other flange b13. The design of the wide flow channel between the heat exchange plate tubes 2 can effectively reduce the accumulation and blockage of fly ash.

[0020] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plate - type wide - flow - channel enamel heat exchanger, comprising a frame (1), wherein the frame (1) is a cubic frame structure. The frame (1) includes two upper and lower opposite flange a (11), two left and right opposite side plates (12), and two front and rear opposite flange b (13). The flange a (11) is a rectangular frame welded by channel steel, and the flange b (13) is a rectangular frame welded by angle iron, characterized in that: Between the front and rear ports of the two side plates (12), perforated plates (3) are respectively installed. A number of uniformly arranged perforations (5) are provided on the perforated plates (3). A heat exchange plate tube (2) is installed between two perforations (5) that face each other front and back. The ends of the heat exchange plate tube (2) are inserted into the perforations (5) in a matching manner. The flow cross-section of the heat exchange plate tube (2) is oblong. The outer surface of the heat exchange plate tube (2) is sprayed with enamel. Two perforated plates (3) that face each other front and back and a row of heat exchange plate tubes (2) connected between the two form a heat exchange module. A plurality of heat exchange modules are installed vertically inside the frame (1).

2. The plate-type wide-flow-channel enamel heat exchanger according to claim 1, wherein: The heat exchange plate tube (2) is formed by welding two heat exchange plates, and a plurality of turbulator blocks (7) with concave and convex intersections are provided on the side wall of the heat exchange plate tube (2).

3. The plate-type wide-flow-channel enamel heat exchanger according to claim 2, wherein: A wide flow channel of 12-16 mm is formed between adjacent heat exchange plate tubes (2), and the end of the heat exchange plate tube (2) and the perforation (5) are sealed by a gasket.

4. A plate - type wide - flow - channel enamel heat exchanger according to claim 3, characterized in that: A plurality of baffles (4) are installed vertically on the inner side of the flange b (13). A number of horizontally arranged air holes (6) are distributed on the baffles (4). The air holes (6) correspond to the perforations (5) one by one, and the end face of the heat exchange plate tube (2) abuts against the inner side face of the baffle (4).

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