Plate heat exchanger with backwashing structure

Abstract

The utility model particularly relates to a plate heat exchanger with a backwashing structure, which comprises a first plate heat exchanger, a hot fluid water supply pipe is connected with a second plate heat exchanger, the second plate heat exchanger is communicated with a second hot fluid inlet pipe, a second hot fluid outlet pipe, a second cold fluid inlet pipe and a second cold fluid outlet pipe, and the hot fluid water supply pipe is communicated with the second hot fluid inlet pipe. The first hot fluid outlet pipe and the second hot fluid outlet pipe are connected with a first hot fluid backwashing pipe and a second hot fluid backwashing pipe respectively, the first hot fluid backwashing pipe and the second hot fluid backwashing pipe are connected with a hot fluid backwashing water supply pipe, and the first hot fluid inlet pipe and the second hot fluid inlet pipe are connected with a first hot fluid blow-off pipe and a second hot fluid blow-off pipe respectively. The first hot fluid outlet pipe and the second hot fluid outlet pipe are connected with a hot fluid collecting pipe, and the first cold fluid outlet pipe and the second cold fluid outlet pipe are connected with a cold fluid collecting pipe. Two heat exchangers are arranged, so that the work progress is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of plate heat exchanger, concretely relates to a plate heat exchanger with backwashing structure. BACKGROUND

[0002] Plate heat exchanger is by a series of have certain corrugated shape metal sheet stack and form a kind of high-efficiency heat exchanger. Thin rectangular channel is formed between various sheets, and heat exchange is carried out through sheet. Plate heat exchanger is prone to blockage after a certain period of use, and if disassembling is carried out, it needs to spend a long time, and work progress is also affected. The prior art document CN218821892 discloses a plate heat exchanger backwashing device, but normal circulation is affected during flushing, and work progress is also affected. SUMMARY

[0003] The utility model provides a plate heat exchanger with backwashing structure.

[0004] The technical scheme of the utility model is realized as follows: a plate heat exchanger with backwashing structure, including plate heat exchanger one, plate heat exchanger one is connected with hot fluid inlet pipe one, hot fluid outlet pipe one, cold fluid inlet pipe one and cold fluid outlet pipe one, hot fluid inlet pipe one is connected with hot fluid water supply pipe, cold fluid inlet pipe one is connected with cold fluid water supply pipe, hot fluid water supply pipe is connected with plate heat exchanger two, plate heat exchanger two is connected with hot fluid inlet pipe two, hot fluid outlet pipe two, cold fluid inlet pipe two and cold fluid outlet pipe two, hot fluid water supply pipe is connected with hot fluid inlet pipe two, hot fluid outlet pipe one and hot fluid outlet pipe two are connected with hot fluid backwashing pipe one and hot fluid backwashing pipe two respectively, hot fluid backwashing pipe one and hot fluid backwashing pipe two are connected with hot fluid backwashing water supply pipe, hot fluid inlet pipe one and hot fluid inlet pipe two are connected with hot fluid blowdown pipe one and hot fluid blowdown pipe two respectively, hot fluid outlet pipe one and hot fluid outlet pipe two are connected with hot fluid collection pipe, cold fluid outlet pipe one and cold fluid outlet pipe two are connected with cold fluid collection pipe.

[0005] Hot fluid backwashing pipe one and cold fluid backwashing pipe two are connected on cold fluid outlet pipe one and cold fluid outlet pipe two, cold fluid backwashing pipe one is connected with cold fluid backwashing water supply pipe, cold fluid inlet pipe one and cold fluid inlet pipe two are connected with cold fluid blowdown pipe one and cold fluid blowdown pipe two.

[0006] The top of plate heat exchanger two is provided with a supporting plate, and plate heat exchanger one is installed on the top of the supporting plate.

[0007] Electromagnetic valves are installed on hot fluid inlet pipe one, hot fluid outlet pipe one, hot fluid inlet pipe two, hot fluid outlet pipe two, hot fluid backwashing pipe and hot fluid blowdown pipe.

[0008] The electromagnetic valves are installed on the cold fluid inlet pipe one, the cold fluid outlet pipe one, the cold fluid inlet pipe two, the cold fluid outlet pipe two, the cold fluid backwash pipe one and the cold fluid backwash water supply pipe.

[0009] The technical scheme of the utility model has the following positive effects: the utility model is provided with two up and down distributed plate heat exchanger one and plate heat exchanger two, save space, when the plate heat exchanger one needs to be backwashed, the plate heat exchanger two normally works, when the plate heat exchanger two needs to be backwashed, the plate heat exchanger one normally works, the hot fluid backwash water source of the plate heat exchanger one and the plate heat exchanger two is same, the cold fluid backwash water source is same. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structure front view of the utility model.

[0011] Figure 2 It is the hot fluid circulation schematic view of the plate heat exchanger one of the utility model.

[0012] Figure 3 It is the cold fluid circulation schematic view of the plate heat exchanger two of the utility model.

[0013] Figure 4 It is the cold fluid circulation schematic view of the plate heat exchanger one of the utility model.

[0014] Figure 5 It is the cold fluid circulation schematic view of the plate heat exchanger two of the utility model.

[0015] Figure 6 It is the side view of the plate heat exchanger one. DETAILED DESCRIPTION

[0016] As Figures 1-6As shown, a plate heat exchanger with a backflushing structure includes a plate heat exchanger 1. The plate heat exchanger 1 is connected to a hot fluid inlet pipe 2, a hot fluid outlet pipe 3, a cold fluid inlet pipe 4, and a cold fluid outlet pipe 5. The hot fluid inlet pipe 2 is connected to a hot fluid supply pipe 6, and the cold fluid inlet pipe 4 is connected to a cold fluid supply pipe 7. The hot fluid supply pipe 6 is connected to a plate heat exchanger 28, which is connected to a hot fluid inlet pipe 29, a hot fluid outlet pipe 20, a cold fluid inlet pipe 21, and a cold fluid outlet pipe 22. The hot fluid supply pipe 6 is connected to the hot fluid inlet pipe 29... 9 are connected. Hot fluid outlet pipe 13 and hot fluid outlet pipe 21 are respectively connected to hot fluid backwash pipe 13 and hot fluid backwash pipe 21. Hot fluid backwash pipe 13 is connected to hot fluid backwash water supply pipe 14. Hot fluid inlet pipe 12 and hot fluid inlet pipe 29 are connected to hot fluid drain pipe 15. Cold fluid outlet pipe 15 and cold fluid outlet pipe 212 are connected to cold fluid backwash pipe 16. Cold fluid backwash pipe 16 is connected to cold fluid backwash water supply pipe 17. Cold fluid inlet pipe 14 and cold fluid inlet pipe 21 are connected to cold fluid drain pipe 18.

[0017] The specific working process is as follows: When plate heat exchanger 28 needs flushing, the normal working mode of plate heat exchanger 1 is activated, and the hot fluid and cold fluid of plate heat exchanger 1 circulate normally. Figure 1 The hot fluid shown enters from the hot fluid supply pipe 6 into the hot fluid inlet pipe 4, circulates once in the plate heat exchanger 1, exits from the hot fluid outlet pipe 3, and finally exits from the hot fluid collection pipe 30 for collection; as shown Figure 2 The cold fluid shown enters from the cold fluid supply pipe 7 into the cold fluid inlet pipe 4, circulates once in the plate heat exchanger 1, and then exits from the cold fluid outlet pipe 5 and finally exits through the cold fluid collection pipe 31 for collection.

[0018] The hot fluid backwashing circulation process of plate heat exchanger 28 is as follows: the hot fluid backwashing water in the hot fluid backwashing water supply pipe 14 enters the hot fluid backwashing pipe 21, enters the hot fluid outlet pipe 22, circulates once in plate heat exchanger 28, exits from the hot fluid inlet pipe 29, and finally exits through the hot fluid drain pipe 22, realizing the cold fluid reverse circulation of plate heat exchanger 28 without affecting normal operation.

[0019] The cold fluid backflushing circulation process of plate heat exchanger 28 is as follows: Figure 2 As shown, the cold fluid backwash water in the cold fluid backwash water supply pipe 17 enters the cold fluid backwash pipe 21, and the cold fluid outlet pipe 12 circulates once in the plate heat exchanger 8 before exiting through the cold fluid inlet pipe 11 and finally exiting through the cold fluid drain pipe 23, thus realizing the cold fluid reverse circulation of the plate heat exchanger 8 without affecting normal operation.

[0020] When the plate heat exchanger 1 needs to be flushed, the normal working mode of the plate heat exchanger 2 8 is started, the hot fluid normal circulation and the cold fluid normal circulation of the plate heat exchanger 2 1, the hot fluid normal circulation and the cold fluid normal circulation of the plate heat exchanger 1 are closed, and the hot fluid backwashing circulation and the cold fluid backwashing circulation of the plate heat exchanger 1 are opened,

[0021] The hot fluid backwashing circulation process of the plate heat exchanger 1 is that the hot fluid backwashing water in the hot fluid backwashing water supply pipe 14 enters the hot fluid backwashing pipe 1 3, enters the hot fluid outlet pipe 1 3 in the plate heat exchanger 1, circulates once in the plate heat exchanger 1, and finally flows out through the hot fluid blowdown pipe 1 5, realizes the cold fluid backwashing circulation of the plate heat exchanger 2 8, and does not affect the normal work.

[0022] The cold fluid backwashing circulation process of the plate heat exchanger 1 is that the cold fluid backwashing water in the cold fluid backwashing water supply pipe 1 7 enters the cold fluid backwashing pipe 1 6 and the cold fluid outlet pipe 1 5 in the plate heat exchanger 2 8, circulates once in the plate heat exchanger 2 8, and finally flows out through the cold fluid blowdown pipe 1 8, realizes the cold fluid backwashing circulation of the plate heat exchanger 1, and does not affect the normal work.

[0023] The top of the plate heat exchanger 2 8 is provided with a support plate 1 9, and the plate heat exchanger 1 is installed on the top of the support plate 1 9; the plate heat exchanger 1 and the plate heat exchanger 2 8 are vertically installed, thereby saving space.

[0024] The hot fluid inlet pipe 1 2, the hot fluid outlet pipe 1 3, the hot fluid inlet pipe 2 9, the hot fluid outlet pipe 2 1 0, the hot fluid backwashing pipe 1 3, the hot fluid blowdown pipe 1 5 and the hot fluid blowdown pipe 2 2 are all provided with electromagnetic valves 2 0.

[0025] The cold fluid inlet pipe 1 4, the cold fluid outlet pipe 1 5, the cold fluid inlet pipe 1 1 1, the cold fluid outlet pipe 1 2, the cold fluid backwashing pipe 1 6, the cold fluid blowdown pipe 1 8, the cold fluid blowdown pipe 2 3 and the cold fluid backwashing water supply pipe 1 7 are all provided with electromagnetic valves 2 0.

Claims

1. A plate heat exchanger with backflushing structure, comprising a plate heat exchanger one, the plate heat exchanger one being connected with a hot fluid inlet pipe one, a hot fluid outlet pipe one, a cold fluid inlet pipe one and a cold fluid outlet pipe one, characterized in that: The hot fluid inlet pipe one is connected with the hot fluid supply pipe, the cold fluid inlet pipe one is connected with the cold fluid supply pipe, the hot fluid supply pipe is connected with the plate heat exchanger two, the plate heat exchanger two is communicated with the hot fluid inlet pipe two, the hot fluid outlet pipe two, the cold fluid inlet pipe two and the cold fluid outlet pipe two, the hot fluid supply pipe is communicated with the hot fluid inlet pipe two, the hot fluid outlet pipe one and the hot fluid outlet pipe two are respectively connected with the hot fluid backwashing pipe one and the hot fluid backwashing pipe two, the hot fluid backwashing pipe one and the hot fluid backwashing pipe two are connected with the hot fluid backwashing supply pipe, the hot fluid inlet pipe one and the hot fluid inlet pipe two are respectively connected with the hot fluid blowdown pipe one and the hot fluid blowdown pipe two, the hot fluid outlet pipe one and the hot fluid outlet pipe two are connected with the hot fluid collecting pipe, the cold fluid outlet pipe one and the cold fluid outlet pipe two are connected with the cold fluid collecting pipe.

2. The plate heat exchanger with backflushing according to claim 1, characterized in that: The cold fluid outlet pipe one and the cold fluid outlet pipe two are connected with the cold fluid backwashing pipe one and the cold fluid backwashing pipe two, the cold fluid backwashing pipe one is communicated with the cold fluid backwashing supply pipe, the cold fluid inlet pipe one and the cold fluid inlet pipe two are connected with the cold fluid blowdown pipe one and the cold fluid blowdown pipe two.

3. The plate heat exchanger with backflushing according to claim 1, characterized in that: The top of the plate heat exchanger two is provided with a support plate, and the plate heat exchanger one is installed on the top of the support plate.

4. The plate heat exchanger with backflushing according to claim 2, characterized in that: The hot fluid inlet pipe one, the hot fluid outlet pipe one, the hot fluid inlet pipe two, the hot fluid outlet pipe two, the hot fluid backwashing pipe and the hot fluid blowdown pipe are all provided with solenoid valves.

5. The plate heat exchanger with backflushing according to claim 2, characterized in that: The cold fluid inlet pipe one, the cold fluid outlet pipe one, the cold fluid inlet pipe two, the cold fluid outlet pipe two, the cold fluid backwashing pipe one and the cold fluid backwashing supply pipe are all provided with solenoid valves.

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