Efficient plate type heat exchanger unit

Abstract

The utility model belongs to the technical field of urban central heating, and particularly relates to an efficient plate type heat exchanger unit which comprises a first plate type heat exchanger and a second plate type heat exchanger. Heat source water flows in from the heat source water inlet pipe, sequentially flows through the first conversion valve, the second plate type heat exchanger, the second conversion valve and the first plate type heat exchanger, flows out from the heat source water outlet pipe, is pressurized by the first circulating pump and then flows into the second plate type heat exchanger and the first plate type heat exchanger respectively; when the heat source water flows through the first conversion valve, the heat source water can enter the second plate heat exchanger, does not enter the first pipeline and flows into the second conversion valve after primary heat release, and when the heat source water flows through the second conversion valve, the heat source water can enter the second pipeline and does not enter the third pipeline through the arrangement. And after secondary heat release, the heat flows out of the heat source water outlet pipe, so that the heat exchange efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of urban central heating, and particularly relates to an efficient plate heat exchange unit. Background Technique

[0002] At present, plate heat exchange units are mainly applied to the field of urban central heating. A plate heat exchange unit is composed of a plate heat exchanger, a water pump, instruments, valves, electrical equipment, a control system and necessary auxiliary equipment, etc. The plate heat exchange unit has the advantages of small floor area, high heat exchange efficiency, and automatic control that can achieve unattended operation. It is an intelligent heat exchange device for realizing heat exchange between fluids. At the same time, with the emergence of the plate heat exchange unit, the heat exchange base station is more energy-saving and intelligent. With the continuous deepening of the national energy conservation and emission reduction concept, central heating has been popularized in most parts of our country. Central heating has caused many small boilers to be converted into heat exchange stations. As the basic cell of central heating, most heat exchange stations use plate heat exchange units as the basic equipment of the base station. This energy-saving equipment operates safely, stably and has a high degree of automation, which is the first choice of heating enterprises.

[0003] Since the technological processes of current plate heat exchange units are mostly similar, and various manufacturers choose a variety of models of heat exchangers. Although they can all meet the heating requirements, the heat exchange efficiency of the unit is low, and the return water temperature of the primary pipe network is high, which cannot meet the energy-saving requirements. In a heating system, the plate heat exchange unit generally operates with two plate heat exchangers in parallel. The heat source side uses high-temperature water. During the heat exchange process, the temperature difference between the supply and return water is large and the flow rate is small. Its flow rate is 20%-40% of the flow rate on the heated side. Generally, the channel sizes and cross-sectional areas on both sides of the plate heat exchanger in the plate heat exchange unit are the same. When designing the plate heat exchanger to meet the flow rate on the heated side and the flow velocity between the plates, it often leads to a relatively large channel on the heat source side and a relatively low flow velocity between the plates. In the state of low flow velocity, its heat transfer ability will inevitably be damaged. Therefore, we propose an efficient plate heat exchange unit to solve the above problems. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides an efficient plate heat exchange unit, which solves the problems raised in the above background technique.

[0006] (2) Technical Solutions

[0007] The utility model specifically adopts the following technical solutions to achieve the above purposes:

[0008] An efficient plate heat exchanger unit includes a first plate heat exchanger and a second plate heat exchanger. There are two first circulating water side pipe networks on the first plate heat exchanger, and two second circulating water side pipe networks on the second plate heat exchanger. A first steering valve and a second steering valve are provided on one of the two second circulating water side pipe networks. A first pipeline is connected and fixed to the first steering valve. The end of the first pipeline is connected and fixed to one of the two first circulating water side pipe networks. A second pipeline and a third pipeline are connected and fixed to one of the two first circulating water side pipe networks. The second steering valve is connected and fixed to the end of the second pipeline. The third pipeline is connected and fixed to one of the two second circulating water side pipe networks. Filter boxes are connected and fixed to both the third pipeline and the second circulating water side pipeline. A first circulating pump, a second circulating pump and a pressure relief valve are provided on the other second circulating water side pipeline of the two second circulating water side pipe networks. Heat source outlet pipes, heat source inlet pipes, make-up water inlet pipes, circulating water inlet pipes and circulating water outlet pipes are respectively connected and fixed to the multiple filter boxes.

[0009] Further, a rectangular groove with an open side is formed on the filter box, and a filter net is in movable contact with the rectangular groove.

[0010] Further, a sealing plate is fixedly connected to the top of the filter net, and mounting blocks are fixedly connected to both sides of the sealing plate.

[0011] Further, the mounting block is threadedly connected to the filter box through a corresponding bolt.

[0012] Further, the other first circulating water side pipeline of the two first circulating water side pipe networks is connected and fixed to the other second circulating water side pipeline of the two second circulating water side pipe networks.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present utility model provides an efficient plate heat exchanger unit, which has the following

[0015] Beneficial effects:

[0016] In this utility model, the heat source water flows in from the heat source water inlet pipe, successively passes through the first turning valve, the second plate heat exchanger, the second turning valve and the first plate heat exchanger, and after two heat exchanges, it flows out from the heat source water outlet pipe. The circulating water to be heated flows in from the circulating water inlet pipe, and after being pressurized by the first circulating pump, it respectively flows into the second plate heat exchanger and the first plate heat exchanger, absorbs heat respectively, and then flows out from the circulating water outlet pipe. When the heat source water flows through the first turning valve, through the setting, the heat source water can enter the second plate heat exchanger and not enter the first pipeline. After the first heat release, it flows into the second turning valve. When the heat source water flows through the second turning valve, through the setting, the heat source water can enter the second pipeline and not enter the third pipeline, and flows into the first plate heat exchanger through the second pipeline. After the second heat release, it flows out from the heat source water outlet pipe. This can greatly improve the heat exchange efficiency, reduce the return water temperature on the heat source side, reduce the heat exchange loss, realize the energy-saving operation of the system, and improve the utilization rate of the heat source pipe network. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is a three-dimensional structural schematic diagram of the filter box of the present utility model after being cut open;

[0019] Figure 3 For the present utility model Figure 2 is a three-dimensional structural schematic diagram after the filter screen in the present utility model is hidden.

[0020] In the figure: 1. First plate heat exchanger; 2. Second plate heat exchanger; 3. First circulating water side pipe network; 4. First turning valve; 5. First pipeline; 6. Second pipeline; 7. Second turning valve; 8. Third pipeline; 9. Filter box; 10. Heat source water outlet pipe; 11. Heat source water inlet pipe; 12. First circulating pump; 13. Second circulating pump; 14. Pressure relief valve; 15. Make-up water inlet pipe; 16. Circulating water inlet pipe; 17. Circulating water outlet pipe; 18. Return groove; 19. Filter screen; 20. Sealing plate; 21. Mounting block; 22. Bolt; 23. Second circulating water side pipe network. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the 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 creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment

[0023] As Figures 1-3As shown in the figure, an efficient plate heat exchange unit proposed in an embodiment of the present utility model includes a first plate heat exchanger 1 and a second plate heat exchanger 2. There are two first circulating water side pipe networks 3 on the first plate heat exchanger 1, and two second circulating water side pipe networks 23 on the second plate heat exchanger 2. A first turning valve 4 and a second turning valve 7 are provided on one of the two second circulating water side pipe networks 23. A first pipeline 5 is connected and fixed to the first turning valve 4. The end of the first pipeline 5 is connected and fixed to one of the two first circulating water side pipe networks 3. A second pipeline 6 and a third pipeline 8 are connected and fixed to one of the two first circulating water side pipe networks 3. The second turning valve 7 is connected and fixed to the end of the second pipeline 6. The third pipeline 8 is connected and fixed to one of the two second circulating water side pipe networks 23. Filter boxes 9 are connected and fixed to both the third pipeline 8 and the second circulating water side pipe network 23. A first circulating pump 12, a second circulating pump 13 and a pressure relief valve 14 are provided on the other of the two second circulating water side pipe networks 23. Heat source outlet pipes 10, heat source inlet pipes 11, make-up water inlet pipes 15, circulating water inlet pipes 16 and circulating water outlet pipes 17 are respectively connected and fixed to the multiple filter boxes 9. The heat source water flows in from the heat source inlet pipe 11, successively passes through the first turning valve 4, the second plate heat exchanger 2, the second turning valve 7 and the first plate heat exchanger 1, and after two heat exchanges, flows out from the heat source outlet pipe 10. The circulating water to be heated flows in from the circulating water inlet pipe 16, is pressurized by the first circulating pump 12 and then respectively flows into the second plate heat exchanger 2 and the first plate heat exchanger 1, absorbs heat respectively, and then flows out from the circulating water outlet pipe 17. When the heat source water flows through the first turning valve 4, through the setting, the heat source water can enter the second plate heat exchanger 2 and does not enter the first pipeline 5, and after the first heat release, it flows into the second turning valve 7. When the heat source water flows through the second turning valve 7, through the setting, the heat source water can enter the second pipeline 6 and does not enter the third pipeline 8, flows into the first plate heat exchanger 1 through the second pipeline 6, and after the second heat release, flows out from the heat source outlet pipe 10. It can greatly improve the heat exchange efficiency, reduce the return water temperature on the heat source side, reduce the heat exchange loss, realize the energy-saving operation of the system, and improve the utilization rate of the heat source pipe network.

[0024] In some embodiments, a rectangular groove 18 with one side open is formed on the filter box 9, and a filter net 19 is in movable contact with the rectangular groove 18. The setting of the filter net 19 plays a role in filtering.

[0025] In some embodiments, a sealing plate 20 is fixedly connected to the top of the filter net 19, and mounting blocks 21 are fixedly connected to both sides of the sealing plate 20. The setting of the mounting blocks 21 plays a role in connection.

[0026] In some embodiments, the mounting block 21 is threadedly connected to the filter cartridge 9 through corresponding bolts 22. By providing the bolts 22, it is convenient to disassemble and replace the filter net 19.

[0027] In some embodiments, another first circulating water side pipe network 3 in the two first circulating water side pipe networks 3 is connected and fixed to another second circulating water side pipe network 23 in the two second circulating water side pipe networks 23.

[0028] Working principle or structural principle: During use, when operating normally, the heat source water flows in from the heat source inlet pipe 11, successively passes through the first steering valve 4, the second plate heat exchanger 2, the second steering valve 7 and the first plate heat exchanger 1. After two heat exchanges, it flows out from the heat source outlet pipe 10. The circulating water to be heated flows in from the circulating water inlet pipe 16, is pressurized by the first circulating pump 12 and then flows into the second plate heat exchanger 2 and the first plate heat exchanger 1 respectively. After absorbing heat respectively, it flows out from the circulating water outlet pipe 17. When the heat source water flows through the first steering valve 4, by setting, the heat source water can enter the second plate heat exchanger 2 and not enter the first pipeline 5. After the first heat release, it flows into the second steering valve 7. When the heat source water flows through the second steering valve 7, by setting, the heat source water can enter the second pipeline 6 and not enter the third pipeline 8. It flows into the first plate heat exchanger 1 through the second pipeline 6 and flows out from the heat source outlet pipe 10 after the second heat release. This can greatly improve the heat exchange efficiency, reduce the return water temperature on the heat source side, reduce the heat exchange loss, realize the energy-saving operation of the system, and improve the utilization rate of the heat source pipe network.

[0029] When the first plate heat exchanger 1 needs to be repaired due to a fault, the inlet and outlet valves of the first plate heat exchanger 1 are closed. The heat source water flows in from the heat source inlet pipe 11, successively passes through the first steering valve 4, the second plate heat exchanger 2 and the second steering valve 7, and flows out from the heat source outlet pipe 10 after heat exchange. The circulating water to be heated flows in from the circulating water inlet pipe 16, is pressurized by the first circulating pump 12 and then flows into the first plate heat exchanger 1 and the second plate heat exchanger 2 respectively. After absorbing heat respectively, it flows out from the circulating water outlet pipe 17. When the heat source water flows through the first steering valve 4, by setting, the heat source water can enter the second plate heat exchanger 2 and not enter the first pipeline 5. After the first heat release, it flows into the second steering valve 7. When the heat source water flows through the second steering valve 7, by setting, the heat source water can enter the third pipeline 8 and not enter the second pipeline 6, and flows out from the heat source outlet pipe 10 through the third pipeline 8.

[0030] When the second plate heat exchanger 2 fails and needs to be repaired, close the inlet and outlet valves of the second plate heat exchanger 2. The heat source water flows in from the heat source inlet pipe 11, successively passes through the first turning valve 4 and the first plate heat exchanger 1, and then flows out from the heat source outlet pipe 10 after heat exchange. The circulating water to be heated flows in from the circulating water inlet pipe 16, is pressurized by the first circulating pump 12, and then flows into the first plate heat exchanger 1 and the second plate heat exchanger 2 respectively. After absorbing heat respectively, it flows out from the circulating water outlet pipe 17. When the heat source water flows through the first turning valve 4, the heat source water can be made to enter the first pipeline 5 and the second plate heat exchanger 2 through setting, and then flows into the heat source outlet pipe 10 after releasing heat once. The second turning valve 7 is closed through setting.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, 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 high-efficiency plate heat exchange unit, comprising a first plate heat exchanger (1) and a second plate heat exchanger (2), characterized in that: The first plate heat exchanger (1) is provided with two first circulating water side pipe networks (3), the second plate heat exchanger (2) is provided with two second circulating water side pipe networks (23), one of the two second circulating water side pipe networks (23) is provided with a first steering valve (4) and a second steering valve (7), the first steering valve (4) is connected to and fixed with a first pipeline (5), the end of the first pipeline (5) is connected to and fixed with one of the two first circulating water side pipe networks (3), the second pipeline (6) and the third pipeline (8) are connected to and fixed with one of the two first circulating water side pipe networks (3), the first steering valve (4) is connected to and fixed with a first circulating water side pipe network ... The second steering valve (7) is connected to and fixed to the end of the second pipeline (6); the third pipeline (8) is connected to and fixed to one of the two second circulating water side pipeline networks (23); a filter box (9) is connected to and fixed to the third pipeline (8) and the second circulating water side pipeline network (23); the other of the two second circulating water side pipeline networks (23) is provided with a first circulating pump (12), a second circulating pump (13) and a pressure relief valve (14); and a plurality of filter boxes (9) are respectively connected to and fixed to a heat source outlet pipe (10), a heat source inlet pipe (11), a water supply inlet pipe (15), a circulating water inlet pipe (16) and a circulating water outlet pipe (17).

2. A high-efficiency plate heat exchanger unit according to claim 1, characterized in that: The filter box (9) is provided with a circular groove (18) with one side being open, and a filter net (19) is movably contacted on the circular groove (18).

3. A high-efficiency plate heat exchanger unit according to claim 2, characterized in that: A sealing plate (20) is fixedly connected to the top of the filter screen (19), and mounting blocks (21) are fixedly connected to both sides of the sealing plate (20).

4. A high-efficiency plate heat exchanger unit according to claim 3, characterized in that: The mounting block (21) is threadedly connected to the filter box (9) via corresponding bolts (22).

5. The high-efficiency plate heat exchanger unit according to claim 1, characterized in that: Another of the two first circulating water side pipe networks (3) is connected to and fixed to another of the two second circulating water side pipe networks (23).

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