High-pressure-resistant cleanable welded plate heat exchanger

Abstract

A high-pressure-resistant cleanable welded plate heat exchanger mainly structurally comprises a heat exchange plate bundle core, box bodies are welded to the upper end and the lower end of the heat exchange plate bundle core respectively, the box bodies are externally connected with rectangular flanges, and the rectangular flanges and square flange covers are connected in a sealed mode through bolts; the steam side of the heat exchange plate bundle core is externally connected with a middle connecting box, a middle partition plate is arranged in the middle connecting box to divide the interior of the middle connecting box into a steam inlet cavity and a condensate outlet cavity, a steam inlet flange is arranged on the middle connecting box at the steam inlet cavity, and a condensate outlet flange is arranged on the middle connecting box at the condensate outlet cavity. And the box body is respectively connected with a cold material flow inlet flange and a cold material flow outlet flange. The heat exchanger structure with two detachable surfaces is combined with the middle connecting box, so that the heat exchanger can be easily opened when the working condition that the medium is not clean and substances insoluble in the medium cause the channel to be easily blocked needs to be cleaned irregularly, the maintenance cost of equipment is reduced, the maintenance is convenient, the compactness of the welded plate type heat exchanger is improved, and the occupied area of the heat exchanger is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchanger design and manufacturing, and relates to a high-pressure resistant and washable welded plate heat exchanger. Background Art

[0002] The welded plate heat exchanger is a heat exchange equipment with high heat transfer efficiency, small footprint, easy installation and use, light weight and compact structure.

[0003] In the field of cogeneration and centralized heating, welded plate heat exchangers are suitable for steam-water heat exchange. Traditional shell and tube heat exchangers in the field of cogeneration have low heat transfer efficiency, large floor space, and technical problems such as container scaling that cannot be mechanically cleaned on site and difficult to repair. A new structure welded plate heat exchanger is designed to solve the technical problems of traditional shell and tube heat exchangers that cannot be cleaned on site and difficult to inspect and repair. The new structure welded plate heat exchanger can withstand high pressure and can be easily opened for mechanical cleaning. The new structure improves the reliability of the welded plate heat exchanger and expands the application field.

[0004] Useful content

[0005] The utility model provides a high-pressure resistant and washable welded plate heat exchanger, aiming to solve the technical problem that a traditional shell and tube heat exchanger cannot be cleaned on site and is difficult to inspect and maintain.

[0006] The technical solution adopted by the utility model is:

[0007] A high-pressure resistant and washable welded plate heat exchanger, whose main structure includes a heat exchange plate bundle core, the upper and lower ends of the heat exchange plate bundle core are respectively welded to a box body, the box body is connected to a rectangular flange, and the rectangular flange and the square flange cover are sealed and connected by bolts; the steam side of the heat exchange plate bundle core is externally connected to an intermediate connecting box, and an intermediate partition is arranged in the intermediate connecting box to divide the interior of the intermediate connecting box into a steam inlet chamber and a condensate outlet chamber, a steam inlet flange is arranged on the intermediate connecting box at the steam inlet chamber, and a condensate outlet flange is arranged on the intermediate connecting box at the condensate outlet chamber, and the box body is respectively connected to a cold logistics inlet flange and a cold logistics outlet flange.

[0008] The intermediate connecting box is a semicircular arch structure.

[0009] Pressing plates are arranged on both sides of the heat exchange plate bundle core body, and the heat exchange plate bundle core body is clamped and fixed by the pressing plates and clamping studs.

[0010] The steam inlet flange and the condensate outlet flange have the same pipe opening orientation on the intermediate connecting box.

[0011] The cold logistics inlet flange and the cold logistics outlet flange have the same pipe opening direction on the box body.

[0012] The utility model adopts a heat exchanger structure design with detachable two sides combined with an intermediate connecting box design. When the cold logistics side encounters a condition where the medium is not clean and there are substances insoluble in the medium that cause the channel to be easily blocked and requires irregular cleaning, it can be easily opened, thereby reducing equipment maintenance costs, facilitating inspection and maintenance, improving the compactness and reliability of the welded plate heat exchanger, and reducing the floor space occupied by the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the general assembly drawing of the utility model;

[0014] Figure 2 It is a schematic diagram of the overall structure decomposition of the utility model;

[0015] Figure 3 It is a schematic diagram of the components of the utility model;

[0016] Numbers in the figure: 1. Box body, 2. Heat exchange plate bundle core, 3. Steam inlet flange, 4. Condensate outlet flange, 5. Cold logistics inlet flange, 6. Cold logistics outlet flange, 7. Square flange, 8. Square flange cover, 9. Press plate, 10. Clamping studs, 11. Middle partition, 12. Middle connecting box, 1001. Steam inlet pipe, 1002. Condensate outlet pipe, 2001. Cold logistics inlet pipe, 2002. Cold logistics outlet pipe; Steam-condensate, B. Cold logistics. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0018] Reference Figure 1 , Figure 2 , Figure 3 A high-pressure resistant and washable welded plate heat exchanger, the main structure of which includes a heat exchange plate bundle core, the upper and lower ends of the heat exchange plate bundle core 2 are respectively welded to a box 1, the box 1 is used for the circulation of cold logistics medium, the box 1 is externally connected to a rectangular flange 7, the rectangular flange 7 and the square flange cover 8 are sealed and connected by bolts, the design of the rectangular flange is convenient for equipment inspection and maintenance, and the detachable design on the cold logistics side makes the welded plate heat exchanger easy to maintain and clean. The steam side of the heat exchange plate bundle core 2 is externally connected to an intermediate connecting box 12, and the middle partition 11 is arranged in the intermediate connecting box 12 to divide the interior of the intermediate connecting box 12 into a steam inlet cavity and a condensate outlet cavity, ensuring that steam and condensate are completely separated. A steam inlet flange 3 is arranged on the intermediate connecting box 12 at the steam inlet cavity, and a condensate outlet flange 4 is arranged on the intermediate connecting box 12 at the condensate outlet cavity, and the box 1 is respectively connected to a cold logistics inlet flange 5 and a cold logistics outlet flange 6.

[0019] Reference Figure 3 The intermediate connecting box 12 is a semicircular arch structure, which can withstand high pressure.

[0020] Reference Figure 1 The heat exchange plate bundle core 2 is clamped and fixed on both sides by a pressing plate 9 and a clamping stud 10; the pressing plate and the clamping stud clamp and fix the heat exchange plate bundle core, and the heat exchange plate bundle core has a certain rigidity, which can effectively solve the vibration.

[0021] The steam inlet flange 3 and the condensate outlet flange 4 are oriented in the same direction on the intermediate connecting box 12, so that the hot flow inlet and the hot flow outlet are oriented in the same direction, which is convenient for pipeline layout.

[0022] The cold logistics inlet flange 5 and the cold logistics outlet flange 6 are oriented in the same direction on the box body 1, so that the cold logistics inlet and the cold logistics outlet are oriented in the same direction, which is convenient for pipeline layout.

[0023] The specific heat transfer process is:

[0024] Steam flows from the steam inlet pipe 1001 into the intermediate connecting box 12, and enters the heat exchange plate bundle core 2 through the intermediate connecting box 12. After the steam has completely exchanged heat inside the heat exchange plate bundle core 2, condensate is generated, and the condensate passes through the intermediate connecting box 12 and flows out from the condensate outlet pipe 1002. Cold logistics flows from the cold logistics inlet pipe 2001, enters the heat exchange plate bundle core 2, and flows out from the cold logistics outlet pipe 2002 after heat exchange in the plate bundle. The intermediate connecting box 12 and the heat exchange plate bundle core 2 form a steam heat exchange channel, and the pipe box 1 and the heat exchange plate bundle core 2 form a cold logistics heat exchange channel, without interfering with each other.

[0025] The working process of this utility model:

[0026] like Figure 2 As shown, after the steam enters the intermediate connecting box 12, it flows downward through the intermediate connecting box 12, passes through the heat exchange plate bundle core 2, and flows in the vertical direction, transfers heat with the cold flow through the plate bundle to form condensate, and flows out from the condensate outlet pipe 1002.

[0027] After the cold logistics enters the box body 1, it enters the heat exchange plate bundle core 2 through the box body 1, and after heat exchange in the heat exchange plate bundle core 2, it flows out from the cold logistics outlet pipe 2002.

[0028] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed in the present invention according to the technical solution and practical concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high pressure resistant and washable welded plate heat exchanger, the main structure of which includes a heat exchange plate bundle core, characterized in that: The upper and lower ends of the heat exchange plate bundle core (2) are respectively welded to a box body (1); the box body (1) is externally connected to a rectangular flange (7); the rectangular flange (7) and the square flange cover (8) are sealed and connected by bolts; the steam side of the heat exchange plate bundle core (2) is externally connected to an intermediate connecting box (12); an intermediate partition (11) is arranged in the intermediate connecting box (12) to divide the interior of the intermediate connecting box (12) into a steam inlet cavity and a condensate outlet cavity; a steam inlet flange (3) is arranged on the intermediate connecting box (12) at the steam inlet cavity; a condensate outlet flange (4) is arranged on the intermediate connecting box (12) at the condensate outlet cavity; and the box body (1) is respectively connected to a cold flow inlet flange (5) and a cold flow outlet flange (6).

2. A high pressure resistant and washable welded plate heat exchanger according to claim 1, characterized in that: The intermediate connecting box (12) is a semicircular arch structure.

3. The high pressure resistant and washable welded plate heat exchanger according to claim 1, characterized in that: Pressing plates (9) are arranged on both sides of the heat exchange plate bundle core (2), and the heat exchange plate bundle core (2) is clamped and fixed by the pressing plates (9) and clamping studs (10).

4. The high pressure resistant and washable welded plate heat exchanger according to claim 1, characterized in that: The steam inlet flange (3) and the condensate outlet flange (4) have the same pipe opening orientation on the intermediate connecting box (12).

5. The high pressure resistant and washable welded plate heat exchanger according to claim 1, characterized in that: The cold logistics inlet flange (5) and the cold logistics outlet flange (6) have the same pipe opening orientation on the upper surface of the box body (1).

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