Detachable high-reliability liquid channeling prevention plate heat exchanger

Abstract

The utility model discloses a detachable high-reliability anti-liquid-channeling plate heat exchanger which comprises a front fixed end plate (1), a rear fixed end plate (2) and a plurality of heat exchange plates (3), each heat exchange plate (3) is provided with an opening (7) at four corners, a sealing rubber mat (6) is arranged between every two heat exchange plates, each heat exchange plate (3) is of a double-wall structure, and the opening (7) and the sealing rubber mat (6) are arranged on the front fixed end plate (1) and the rear fixed end plate (2) respectively. A first single-layer plate sheet (4) and a second single-layer plate sheet (5) which are identical in structure are overlapped together to form the plate sheet, a circle of welding fixing ring (8) is only arranged on the periphery of an opening (7) between the two single-layer plate sheets, no sealing rubber mat is arranged at other positions between the two single-layer plate sheets, and a leaked liquid collecting groove is further hung at the lower end of the plate sheet. According to the single-layer plate type heat exchanger, liquid leakage can be conveniently found and maintained by personnel in time, meanwhile, the severe situation that different heat exchange media are in direct contact can be avoided, and when one single-layer plate is damaged, only one heat exchange plate where the single-layer plate is located needs to be replaced.

Description

Technical Field

[0001] The utility model belongs to the field of plate heat exchanger production, and particularly relates to a detachable high-reliability anti-flushing plate heat exchanger. Background Art

[0002] The detachable plate heat exchanger is an excellent equipment for heating, cooling, heat recovery, rapid sterilization and other purposes. The detachable plate heat exchanger is also often needed to exchange heat with corrosive liquids such as seawater. The existing plate heat exchanger is usually continuous in the heat exchange process and the plates are also inside. It is difficult to directly disassemble each plate for inspection. If the replacement frequency of the overall heat exchanger is too high, the cost of the heat exchange equipment will be too high. However, if the heat exchange plate is corroded so severely that it is perforated and is not discovered in time, the heat exchange medium on the two flow channels will directly contact and cause liquid leakage due to the existence of the perforation. If the heat exchange medium on the two flow channels is a different medium, it will cause medium contamination or even deterioration. If one or both of the heat exchange media are very expensive and the loss is particularly large when contaminated, it will cause very large economic losses. For this reason, people hope to find a heat exchanger that can detect the damage of the plate in time and avoid the direct contact and liquid leakage of the heat exchange medium on the two flow channels even if the plate is perforated. Utility Model Content

[0003] The utility model aims to provide a detachable high-reliability anti-fluid-buffering plate heat exchanger which can timely detect plate perforation and prevent heat exchange media on two flow channels from directly contacting fluid-buffering.

[0004] The utility model is realized by the following technical solutions:

[0005] A detachable high-reliability anti-fluid channeling plate heat exchanger, comprising a front fixed end plate 1 and a rear fixed end plate 2 respectively located on both sides and a plurality of heat exchange plates 3 located in the middle, each of which cooperates with each other to form a flow channel for heat exchange between two heat exchange media, each heat exchange plate 3 is provided with an opening 7 for forming an inlet and outlet channel for the heat exchange medium at four corners, and a sealing rubber pad 6 is provided between every two heat exchange plates. The heat exchange plate 3 is a double-walled structure, which is composed of a first single-layer plate 4 and a second single-layer plate 5 with the same structure stacked together, and the first single-layer plate 4 and the second single-layer plate 5 are only separated by the opening 7. A welding fixing ring 8 is provided to fix the first single-layer plate 4 and the second single-layer plate 5 together by soldering, so that the gap between the first single-layer plate 4 and the second single-layer plate 5 around the opening 7 can be blocked to prevent the liquid in the inlet and outlet channels of the heat exchange medium from flowing out of the gap between the first single-layer plate 4 and the second single-layer plate 5; no sealing pad is provided at other positions between the first single-layer plate 4 and the second single-layer plate 5, and a leakage collection tank is also fixedly hung at the lower end of the detachable high-reliability anti-liquid channeling plate heat exchanger, and a leakage detection head is provided on the leakage collection tank.

[0006] Preferably, the leakage detection head is a liquid level detection head or a weight detection head.

[0007] Compared with the traditional detachable plate heat exchanger that directly uses single-layer heat exchange plates, a heat exchange plate with a double-wall structure formed by stacking two single-layer plates is used as the heat exchange plate of the detachable plate heat exchanger, and the gap between the two single-layer plates next to the heat exchange medium inlet and outlet channels on the heat exchange plate is sealed by a welding fixing ring, and no sealing gasket is arranged at other positions between the two single-layer plates. This structure can not only prevent the liquid in the heat exchange medium inlet and outlet channels from flowing out from the gap between the two single-layer plates of the heat exchange plate, but also when a single-layer plate in the heat exchange plate is corroded and perforated, the heat exchange medium will definitely leak out through the gap between the two single-layer plates and finally gather in the leakage collection tank. Therefore, by monitoring the leakage collection tank, it is convenient for personnel to know the occurrence of leakage as soon as possible and carry out timely maintenance; and precisely because there is another layer of single-layer plate that has not been corroded on the heat exchange plate, through the blocking effect of the remaining single-layer plate, The media in two different flow channels will not be in direct contact or liquid crosstalk, that is, the bad situation that the two heat exchange media are in direct contact due to the presence of the hole when the single-layer plate is used as the heat exchange plate and the heat exchange plate is corroded and perforated is avoided. Therefore, this structure is particularly suitable for the situation where the heat exchange medium is very expensive and the loss is particularly large when it is contaminated; in addition, when a single-layer plate is damaged, the heat exchange plate where the single-layer plate is located can be replaced, and the maintenance cost is very low, which is particularly suitable for heat exchange situations when the heat exchange medium is corrosive such as seawater; moreover, when a single-layer thicker heat exchange plate is used, the heat exchange plate is still likely to be corroded and perforated. When it is corroded and perforated, liquid crosstalk will occur, which will cause losses caused by mutual contamination of the media in different flow channels, and this situation cannot be discovered in time. When it is discovered, the pollution may be very extensive and the loss is particularly large. Therefore, the detachable high-reliability anti-flushing plate heat exchanger of the utility model is very practical.

[0008] The beneficial effects of the utility model are:

[0009] The detachable high-reliability anti-fluidizing plate heat exchanger of the utility model has an ingenious structure. When a single-layer plate in the heat exchange plate is corroded and perforated, the heat exchange medium will inevitably leak out through the gap between the two single-layer plates and finally gather in the leakage collection tank. Therefore, by monitoring the leakage collection tank, it is convenient for personnel to know the occurrence of leakage as soon as possible and carry out timely maintenance; and because there is another single-layer plate that has not been corroded on the heat exchange plate, the blocking effect of the remaining single-layer plate will prevent the media in two different flow channels from directly contacting each other and causing the adverse situation of liquid leakage. Therefore, this structure is particularly suitable for use when the heat exchange medium is very expensive and the loss is particularly large when it is contaminated; in addition, when a single-layer plate is damaged, it is sufficient to replace the heat exchange plate where the single-layer plate is located. The maintenance cost is very low, the practicability is strong, and it is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0011] Figure 1 This is a schematic diagram of the disassembly structure of a detachable high-reliability anti-flushing plate heat exchanger according to an embodiment of the utility model;

[0012] Figure 2 For Figure 1 A schematic cross-sectional structural diagram of a heat exchanger according to an embodiment of the utility model cut along the AA direction;

[0013] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0014] Figure 4 for Figure 3 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0015] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0016] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0017] like Figure 1-4As shown, a detachable high-reliability anti-fluid channeling plate heat exchanger comprises a front fixed end plate 1 and a rear fixed end plate 2 respectively located on both sides and a plurality of heat exchange plates 3 located in the middle, each of which cooperates with each other to form a flow channel for heat exchange between two heat exchange media. Each heat exchange plate 3 is provided with an opening 7 for forming an inlet and outlet channel for the heat exchange medium at four corners, and a sealing rubber gasket 6 is provided between every two heat exchange plates. The heat exchange plate 3 is a double-walled structure, which is composed of a first single-layer plate 4 and a second single-layer plate 5 with the same structure stacked together, and there is only a sealing gasket around the opening 7 between the first single-layer plate 4 and the second single-layer plate 5. There is a welding fixing ring 8 formed by fixing the first single-layer plate 4 and the second single-layer plate 5 together by soldering, so that the gap between the first single-layer plate 4 and the second single-layer plate 5 around the opening 7 can be blocked to prevent the liquid in the inlet and outlet channels of the heat exchange medium from flowing out of the gap between the first single-layer plate 4 and the second single-layer plate 5; no sealing pads are provided at other positions between the first single-layer plate 4 and the second single-layer plate 5, and a leakage collection tank (not shown) is also fixedly hung at the lower end of the detachable high-reliability anti-liquid channeling plate heat exchanger, and a leakage detection head is provided on the leakage collection tank.

[0018] On the detachable high-reliability anti-fluidization plate heat exchanger, the sealing gasket 6 is arranged in the same manner as an ordinary detachable plate heat exchanger, and is only arranged between every two heat exchange plates 3 to ensure the flow channel between the heat exchange plates and the sealing of the plates to the outside.

[0019] The liquid leakage detection head is a liquid level detection head or a weight detection head.

[0020] When producing the detachable high-reliability anti-flushing plate heat exchanger, the heat exchange plate 3 is first prefabricated, that is, the first single-layer plate 4 and the second single-layer plate 5 are first fixed together by soldering around the opening 7, and then the heat exchange plate 3 and the front and rear end plates are assembled into a finished product according to the conventional steps of assembling a detachable plate heat exchanger.

[0021] The detachable high-reliability anti-liquid channeling plate heat exchanger of the utility model has an ingenious structure. Compared with directly using a thicker heat exchange plate, a heat exchange plate with a double-wall structure formed by overlapping two single-layer plates is used as the heat exchange plate of the detachable heat exchanger, and the gap between the two single-layer plates beside the heat exchange medium inlet and outlet channels on the heat exchange plate is sealed by a welding fixing ring, and no sealing gasket is arranged at other positions between the two single-layer plates. Not only can the liquid in the heat exchange medium inlet and outlet channels be prevented from flowing out from the gap between the two single-layer plates of the heat exchange plate, but also when a certain layer of the single-layer plates in the heat exchange plate is corroded and perforated, the heat exchange medium will definitely leak out through the gap between the two single-layer plates and finally gather in the leakage collection tank. Therefore, by monitoring the leakage collection tank, it is convenient for personnel to know the occurrence of leakage as soon as possible and carry out timely maintenance; and precisely because there is another layer of single-layer plates that have not been corroded on the heat exchange plate, through the remaining single-layer plate The blocking effect of the layer plate will prevent the media in two different flow channels from directly contacting and liquid crosstalk, that is, directly avoiding the bad situation that when a single-layer plate is used as a heat exchange plate and the heat exchange plate is corroded and perforated, the two heat exchange media will directly contact each other due to the existence of the hole. Therefore, this structure is particularly suitable for the situation where the heat exchange medium is very expensive and the loss is particularly large when it is contaminated; in addition, when a single-layer plate is damaged, the heat exchange plate where the single-layer plate is located can be replaced, and the maintenance cost is very low, which is particularly suitable for heat exchange when the heat exchange medium is corrosive such as seawater; moreover, when a single-layer thicker heat exchange plate is used, the heat exchange plate is still likely to be corroded and perforated. When it is corroded and perforated, liquid crosstalk will occur, which will cause losses caused by mutual contamination of the media in different flow channels, and this situation cannot be discovered in time. When it is discovered, the pollution may be very extensive and the loss is particularly large. Therefore, the detachable high-reliability anti-flushing plate heat exchanger of the utility model is very practical.

[0022] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A detachable high-reliability anti-fluid channeling plate heat exchanger, comprising a front fixed end plate (1) and a rear fixed end plate (2) respectively located on both sides, and a plurality of heat exchange plates (3) located in the middle, each of which cooperates with each other to form a flow channel for heat exchange between two heat exchange media, each heat exchange plate (3) is provided with an opening (7) at four corners for forming an inlet and outlet channel for the heat exchange medium, and a sealing rubber pad (6) is provided between every two heat exchange plates, characterized in that: The heat exchange plate (3) is a double-walled structure, which is composed of a first single-layer plate (4) and a second single-layer plate (5) having the same structure stacked together. A welding fixing ring (8) is provided between the first single-layer plate (4) and the second single-layer plate (5) only around the opening (7), and the first single-layer plate (4) and the second single-layer plate (5) are fixed together by soldering, so that the gap between the first single-layer plate (4) and the second single-layer plate (5) around the opening (7) can be blocked to prevent the liquid in the heat exchange medium inlet and outlet channels from flowing out of the gap between the first single-layer plate (4) and the second single-layer plate (5); no sealing rubber pad is provided at other positions between the first single-layer plate (4) and the second single-layer plate (5). A liquid leakage collection tank is also fixedly hung at the lower end of the detachable high-reliability anti-flushing plate heat exchanger, and a liquid leakage detection head is provided on the liquid leakage collection tank.

2. The detachable high-reliability anti-flushing plate heat exchanger according to claim 1 is characterized in that: The liquid leakage detection head is a liquid level detection head or a weight detection head.

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