Plate heat exchanger cleaning device

Abstract

The invention relates to the technical field of power plant plate heat exchanger cleaning, and provides a plate heat exchanger cleaning device which comprises a water inlet pipeline (1) installed at one end of a plate heat exchanger; the water outlet pipeline (2) is mounted at the other end of the plate heat exchanger; the backwashing structure (3) is connected with the water outlet pipeline (2), pulse type washing water flow is injected into the water outlet pipeline (2), and the pulse type washing water flow is discharged through the water inlet pipeline (1) after washing plate sheets of the plate heat exchanger through the water outlet pipeline (2). Impulse type flushing water flow can be injected into the water outlet pipeline through the backwashing structure, and the flushing water flow reversely flushes the plate sheets of the plate heat exchanger in the direction from the water outlet pipeline to the water inlet pipeline in the pressure state and flushes the plate sheets of the plate heat exchanger in the pressure pulse state, so that the plate sheets of the plate heat exchanger can be washed clean; impurities between the plate sheets of the plate heat exchanger can be flushed away and are not left.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning plate heat exchangers in power plants, and in particular to a cleaning device for plate heat exchangers. Background Art

[0002] The cooling side of the plate heat exchanger is seawater. Since the heat exchange flow channel of the plate is small, shells and other debris in the seawater can easily cause the plate to be blocked, resulting in poor cooling effect. The traditional solution usually uses an integrated cleaning machine to clean the plate heat exchanger, but the cleaning process is relatively cumbersome, the initial cleaning preparation workload is large, and the equipment connection requires a high-power power supply, cleaning water source, compressed air, etc. Each cleaning of the plate heat exchanger is time-consuming and labor-intensive, the work intensity is high, the cleaning time is long, and the cleaning effect is poor. It is easy for debris to remain in the gaps between the plates of the plate heat exchanger. Summary of the invention

[0003] The purpose of the present invention is to solve at least one technical problem in the background technology and provide a plate heat exchanger cleaning device.

[0004] To achieve the above object, the present invention provides a plate heat exchanger cleaning device, comprising:

[0005] The water inlet pipe is installed at one end of the plate heat exchanger;

[0006] The water outlet pipe is installed at the other end of the plate heat exchanger;

[0007] The backwashing structure is connected to the outlet pipe, and a pulse flushing water flow is injected into the outlet pipe. The pulse flushing water flow flushes the plate heat exchanger plates through the outlet pipe and is then discharged through the inlet pipe.

[0008] According to one aspect of the present invention, a water inlet butterfly valve is provided at the end of the water inlet pipe, and a pulse cleaning outlet is provided on the pipe wall of the water inlet pipe.

[0009] According to one aspect of the present invention, a water return butterfly valve is provided at the end of the water outlet pipe, and a pulse cleaning inlet is provided on the pipe wall of the water outlet pipe.

[0010] According to one aspect of the present invention, the backwashing structure comprises: a backwashing pipe connected to the pulse cleaning inlet, and backwashing water is injected into the water outlet pipe through the backwashing pipe and the pulse cleaning inlet.

[0011] According to one aspect of the present invention, a first isolation valve for controlling the amount of backwash water is provided on the backwash pipeline.

[0012] According to one aspect of the present invention, the backwashing structure further comprises: a pulse gas release component, wherein the pulse gas release component is connected to the backwashing pipeline and injects a pulse gas flow into the backwashing pipeline.

[0013] According to one aspect of the present invention, the pulse gas release assembly comprises: a compressed air injection pipeline, a gas storage release buffer tank and a pulse airflow injection pipeline;

[0014] The compressed air injection pipeline is connected to the gas storage release buffer tank to inject compressed air into the gas storage release buffer tank;

[0015] The air storage release buffer tank temporarily stores compressed air and is connected to the backwashing pipeline through the pulse airflow injection pipeline, and pulse airflow is intermittently injected into the backwashing pipeline through the pulse airflow injection pipeline.

[0016] According to one aspect of the present invention, a second isolation valve for controlling the amount of compressed air is provided on the compressed air injection pipeline.

[0017] According to one aspect of the present invention, the gas storage release buffer tank is provided with a pressure gauge for monitoring the internal air pressure thereof, a drainage pipe is provided at the bottom of the gas storage release buffer tank, and a drainage valve is provided on the drainage pipe.

[0018] According to one aspect of the present invention, a check valve is provided on the pulse airflow injection pipeline.

[0019] According to one solution of the present invention, a plate heat exchanger cleaning device includes: an inlet pipe installed at one end of the plate heat exchanger; an outlet pipe installed at the other end of the plate heat exchanger; a backwashing structure connected to the outlet pipe, injecting a pulsed flushing water flow into the outlet pipe, the pulsed flushing water flow flushes the plate heat exchanger plates through the outlet pipe, and then is discharged through the inlet pipe. With such a configuration, when it is necessary to clean the plate heat exchanger, the forward medium flow through the inlet pipe and the outlet pipe can be stopped, the cooling and heat exchange work of the plate heat exchanger can be stopped, and then the pulsed flushing water flow is injected into the outlet pipe through the backwashing structure, and the flushing water flow reversely flushes the plates of the plate heat exchanger from the outlet pipe to the inlet pipe in a pressure state, flushing the plates of the plate heat exchanger in a pressure pulse state, so that the plates of the plate heat exchanger can be cleaned, ensuring that the debris between the plates of the plate heat exchanger is cleaned and no residue is left.

[0020] According to one solution of the present invention, a water inlet butterfly valve is provided at the end of the water inlet pipe, and a pulse cleaning outlet is provided on the pipe wall of the water inlet pipe. A water return butterfly valve is provided at the end of the water outlet pipe, and a pulse cleaning inlet is provided on the pipe wall of the water outlet pipe. With such a configuration, when it is necessary to clean the plate heat exchanger, the water inlet butterfly valve and the water return butterfly valve can be closed to stop the heat exchange medium from flowing into the plate heat exchanger in the forward direction for cooling and heat exchange, and then the reverse flushing water flow flows in and out through the pulse cleaning inlet and the pulse cleaning outlet, so as to flush and rinse the plates of the plate heat exchanger and realize reverse flushing.

[0021] According to one solution of the present invention, the backwashing structure includes: a backwashing pipe, the backwashing pipe is connected to the pulse cleaning inlet, and backwashing water with a certain pressure is injected into the outlet pipe through the backwashing pipe and the pulse cleaning inlet. In this way, the backwashing water with pressure conveyed through the backwashing pipe flows into the outlet pipe through the pulse cleaning inlet and flows toward the plate heat exchanger, thereby achieving the function of flushing the plate heat exchanger and achieving rough cleaning of the plate heat exchanger.

[0022] According to one solution of the present invention, a first isolation valve for controlling the amount of backwash water is provided on the backwash pipeline. With this arrangement, the amount of backwash water can be controlled by the first isolation valve according to the flushing requirements, so as to achieve fast and accurate cleaning, avoid excessive or insufficient flushing water flow, and ensure the flushing effect.

[0023] According to one solution of the present invention, the backwashing structure further includes: a pulse gas release component, the pulse gas release component is connected to the backwashing pipeline, and a pulse gas flow is injected into the backwashing pipeline. In this way, the pulse gas flow injected into the backwashing pipeline by the pulse gas release component can assist the flushing water flow in the backwashing pipeline to form a pulse water flow, so that a pulse flushing of the plate heat exchanger can be formed, and the flushing force can be greater, the flushing effect is better, and it is ensured that no debris is left between the plates, so as to achieve fine washing of the plate heat exchanger.

[0024] According to one solution of the present invention, the pulse gas release assembly includes: a compressed air injection pipeline, a gas storage release buffer tank and a pulse airflow injection pipeline; the compressed air injection pipeline is connected to the gas storage release buffer tank, and compressed air is injected into the gas storage release buffer tank; the gas storage release buffer tank temporarily stores compressed air, and is connected to the backwashing pipeline through the pulse airflow injection pipeline, and pulse airflow is intermittently injected into the backwashing pipeline through the pulse airflow injection pipeline. In this way, compressed air can be transported to the gas storage release buffer tank through the compressed air injection pipeline, so that the gas storage release buffer tank stores enough compressed air for flushing the plate heat exchanger per unit number of times, and then the compressed air in the gas storage release buffer tank is intermittently discharged, and the compressed air is injected into the backwashing pipeline in a pulsed manner through the pulse airflow injection pipeline, so that the compressed air drives the water flow in the backwashing pipeline to form a pulse water flow to flush the plate heat exchanger. The whole process is to form a pulse flushing water flow through the cooperation of intermittent airflow and water flow, and the turbulent flow mode of the pulse flushing water flow can effectively improve the cleaning effect and cleaning efficiency, and accelerate the cleaning of debris retained in the gap between the plates.

[0025] According to one solution of the present invention, a second isolation valve for controlling the amount of compressed air is provided on the compressed air injection pipeline. With such a configuration, the amount of backwashing compressed air can be controlled by the second isolation valve according to the flushing requirements, thereby controlling the pulse size, ensuring that the pulse water flow quickly and accurately cleans the plate heat exchanger, avoiding excessive or insufficient pulse water flow, and ensuring the flushing effect.

[0026] According to one solution of the present invention, a pressure gauge for monitoring the internal air pressure of the gas storage release buffer tank is provided on the gas storage release buffer tank, a drainage pipe is provided at the bottom of the gas storage release buffer tank, and a drainage valve is provided on the drainage pipe. With such a configuration, the internal pressure of the gas storage release buffer tank can be monitored by the pressure gauge, and the amount of compressed air inside the gas storage release buffer tank can be monitored. The water stored in the gas storage release buffer tank can be discharged in time through the drainage pipe and the drainage valve, ensuring that the system provides pulse turbulent cleaning efficiently and stably.

[0027] According to one solution of the present invention, a check valve is provided on the pulse airflow injection pipeline, so that the check valve can prevent cooling water from entering the compressed air side.

[0028] According to the scheme of the present invention, the present invention realizes the formation of pulse flushing water flow through the coordination of intermittent air flow and water flow. The turbulent flushing of the pulse water flow can ensure that the cleaning of the plate heat exchanger is faster and more efficient, and ensure that no debris remains between the plates of the plate heat exchanger. In addition, the entire cleaning process is time-saving and labor-saving, with low work intensity, which can effectively save labor costs, and the cleaning speed is fast and the effect is good.

[0029] According to the scheme of the present invention, the present invention can realize two modes of flushing plate heat exchangers. One is a simple rough wash of the plate heat exchanger by a pressurized water flow alone, which is applicable to the situation where the cleaning difficulty is relatively small and there are fewer debris between the plates and it is easier to clean; the other is a fine wash of the plate heat exchanger by a pulsed water flow formed by the combination of intermittent airflow and pressurized water flow, which is applicable to the situation where the cleaning difficulty is relatively large and there are more debris between the plates and it is not easy to clean. Therefore, the present invention has strong applicability and can effectively cope with cleaning scenes of different degrees to ensure the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The structural arrangement diagram of a plate heat exchanger cleaning device according to an embodiment of the present invention is schematically shown. DETAILED DESCRIPTION

[0031] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only to enable those skilled in the art to better understand and thus implement the present invention, rather than implying any limitation on the scope of the present invention.

[0032] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including, but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on.” The terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0033] Figure 1 The structural layout diagram of a plate heat exchanger cleaning device according to an embodiment of the present invention is schematically shown. Figure 1 As shown, in this embodiment, the plate heat exchanger cleaning device includes:

[0034] A water inlet pipe 1 is installed at one end of the plate heat exchanger;

[0035] The water outlet pipe 2 is installed at the other end of the plate heat exchanger;

[0036] The backwashing structure 3 is connected to the outlet pipe 2, and a pulsed flushing water flow is injected into the outlet pipe 2. After the pulsed flushing water flow flushes the plate heat exchanger plates through the outlet pipe 2, it is discharged through the inlet pipe 1. With such a configuration, when it is necessary to clean the plate heat exchanger, the forward medium flow through the inlet pipe 1 and the outlet pipe 2 can be stopped, the cooling and heat exchange work of the plate heat exchanger can be stopped, and then the pulsed flushing water flow is injected into the outlet pipe 2 through the backwashing structure 3. The flushing water flow flushes the plates of the plate heat exchanger in the reverse direction from the outlet pipe 2 to the inlet pipe 1 under pressure, and flushes the plates of the plate heat exchanger in a pressure pulse state, so that the plates of the plate heat exchanger can be cleaned, ensuring that the debris between the plates of the plate heat exchanger is cleaned and no residue is left.

[0037] Furthermore, if Figure 1 As shown, in this embodiment, a water inlet butterfly valve 4 is provided at the end of the water inlet pipe 1 , and a pulse cleaning outlet 5 is provided on the pipe wall of the water inlet pipe 1 .

[0038] A return butterfly valve 6 is provided at the end of the outlet pipe 2, and a pulse cleaning inlet 7 is provided on the pipe wall of the outlet pipe 2. With such a configuration, when the plate heat exchanger needs to be cleaned, the inlet butterfly valve 4 and the return butterfly valve 6 can be closed to stop the heat exchange medium from flowing into the plate heat exchanger for cooling and heat exchange, and then the reverse flushing water flow flows in and out through the pulse cleaning inlet 7 and the pulse cleaning outlet 5, so as to flush and rinse the plates of the plate heat exchanger and realize reverse flushing.

[0039] Furthermore, if Figure 1 As shown, in this embodiment, the backwashing structure 3 includes: a backwashing pipe 8, the backwashing pipe 8 is connected to the pulse cleaning inlet 7, and backwashing water with a certain pressure is injected into the outlet pipe 2 through the backwashing pipe 8 and the pulse cleaning inlet 7. In this way, the backwashing water with pressure conveyed by the backwashing pipe can flow into the outlet pipe 2 through the pulse cleaning inlet 7 and flow toward the plate heat exchanger, thereby achieving the function of flushing the plate heat exchanger and achieving rough cleaning of the plate heat exchanger.

[0040] Furthermore, if Figure 1 As shown, in this embodiment, a first isolation valve 9 for controlling the amount of backwash water is provided on the backwash pipe 8. With such a configuration, the amount of backwash water can be controlled by the first isolation valve 9 according to the flushing requirements, so as to achieve fast and accurate cleaning, avoid excessive or insufficient flushing water flow, and ensure the flushing effect.

[0041] Furthermore, if Figure 1As shown, in this embodiment, the backwashing structure 3 further includes: a pulse gas release component 10, the pulse gas release component 10 is connected to the backwashing pipe 8, and a pulse gas flow is injected into the backwashing pipe 8. In this way, the pulse gas flow injected into the backwashing pipe 8 by the pulse gas release component 10 can help the flushing water flow in the backwashing pipe 8 to form a pulse water flow, so that a pulse flushing of the plate heat exchanger can be formed, and the flushing force can be greater, the flushing effect is better, and it is ensured that no debris is left between the plates, so as to achieve fine washing of the plate heat exchanger.

[0042] Furthermore, if Figure 1 As shown, in this embodiment, the pulse gas release assembly 10 includes: a compressed air injection pipeline 11, a gas storage release buffer tank 12 and a pulse airflow injection pipeline 13;

[0043] The compressed air injection pipeline 11 is connected to the air storage release buffer tank 12, and the compressed air is injected into the air storage release buffer tank 12;

[0044] The air storage release buffer tank 12 temporarily stores compressed air, and is connected to the backwashing pipe 8 through the pulse airflow injection pipe 13, and pulse airflow is intermittently injected into the backwashing pipe 8 through the pulse airflow injection pipe 13. In this way, compressed air can be transported to the air storage release buffer tank 12 through the compressed air injection pipe 11, so that the air storage release buffer tank 12 stores enough compressed air for flushing the plate heat exchanger per unit number of times, and then the compressed air in the air storage release buffer tank 12 is intermittently discharged by controlling the compressed air in the air storage release buffer tank 12, and the compressed air is injected into the backwashing pipe 8 in a pulsed manner through the pulse airflow injection pipe 13, so that the compressed air drives the water flow in the backwashing pipe 8 to form a pulse water flow to flush the plate heat exchanger. The whole process is to form a pulse flushing water flow through the cooperation of intermittent airflow and water flow, and the turbulent flow of the pulse flushing water flow can effectively improve the cleaning effect and cleaning efficiency, and accelerate the cleaning of debris retained in the gap between the plates.

[0045] Furthermore, if Figure 1 As shown, in this embodiment, a second isolation valve 14 for controlling the amount of compressed air is provided on the compressed air injection pipe 11. With such a configuration, the amount of backwashing compressed air can be controlled by the second isolation valve 14 according to the flushing requirements, thereby controlling the pulse size, ensuring that the pulse water flow quickly and accurately cleans the plate heat exchanger, avoiding excessive or insufficient pulse water flow, and ensuring the flushing effect.

[0046] Furthermore, if Figure 1As shown, in this embodiment, a pressure gauge for monitoring the internal air pressure of the gas storage release buffer tank 12 is provided, a drainage pipe 15 is provided at the bottom of the gas storage release buffer tank 12, and a drainage valve 16 is provided on the drainage pipe 15. In this way, the internal pressure of the gas storage release buffer tank 12 can be monitored by the pressure gauge, and the amount of compressed air inside the gas storage release buffer tank 12 can be monitored. The water stored in the gas storage release buffer tank 12 can be discharged in time through the drainage pipe 15 and the drainage valve 16, ensuring that the system provides pulse turbulent cleaning efficiently and stably.

[0047] Furthermore, if Figure 1 As shown, in this embodiment, a check valve 17 is provided on the pulse airflow injection pipeline 13. Such a configuration can prevent cooling water from entering the compressed air side through the check valve 17.

[0048] According to the above scheme of the present invention, the present invention realizes the formation of pulse flushing water flow through the coordination of intermittent airflow and water flow. The turbulent flushing of the pulse water flow can ensure that the cleaning of the plate heat exchanger is faster and more efficient, and ensure that no debris remains between the plates of the plate heat exchanger. In addition, the entire cleaning process is time-saving and labor-saving, with low work intensity, which can effectively save labor costs, and the cleaning speed is fast and the effect is good.

[0049] According to the above scheme of the present invention, the present invention can realize two modes of flushing plate heat exchangers. One is a simple rough washing of plate heat exchangers by pressurized water flow alone, which is applicable to the situation where the cleaning difficulty is relatively small and there are fewer debris between the plates and it is easier to clean; the other is a fine washing of plate heat exchangers by pulse water flow formed by the combination of intermittent airflow and pressurized water flow, which is applicable to the situation where the cleaning difficulty is relatively large and there are more debris between the plates and it is not easy to clean. Therefore, the present invention has strong applicability and can effectively cope with cleaning scenes of different degrees to ensure the cleaning effect.

[0050] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. Plate heat exchanger cleaning device, It is characterized in that include: A water inlet pipe (1) is installed at one end of the plate heat exchanger; A water outlet pipe (2) is installed at the other end of the plate heat exchanger; The backwashing structure (3) is connected to the outlet pipe (2) and injects a pulsed flushing water flow into the outlet pipe (2). The pulsed flushing water flow flushes the plate heat exchanger plates through the outlet pipe (2) and is then discharged through the inlet pipe (1).

2. The plate heat exchanger cleaning device according to claim 1, It is characterized in that A water inlet butterfly valve (4) is provided at the end of the water inlet pipeline (1), and a pulse cleaning outlet (5) is provided on the pipe wall of the water inlet pipeline (1).

3. The plate heat exchanger cleaning device according to claim 1, It is characterized in that A water return butterfly valve (6) is provided at the end of the water outlet pipe (2), and a pulse cleaning inlet (7) is provided on the pipe wall of the water outlet pipe (2).

4. The plate heat exchanger cleaning device according to claim 3, It is characterized in that The backwashing structure (3) comprises: a backwashing pipe (8), the backwashing pipe (8) being connected to the pulse cleaning inlet (7), and backwashing water being injected into the water outlet pipe (2) through the backwashing pipe (8) and the pulse cleaning inlet (7).

5. The plate heat exchanger cleaning device according to claim 4, It is characterized in that The backwashing pipeline (8) is provided with a first isolation valve (9) for controlling the amount of backwashing water.

6. The plate heat exchanger cleaning device according to claim 4, It is characterized in that The backwashing structure (3) further comprises: a pulse gas release component (10), wherein the pulse gas release component (10) is connected to the backwashing pipeline (8) and injects a pulse gas flow into the backwashing pipeline (8).

7. The plate heat exchanger cleaning device according to claim 6, It is characterized in that The pulse gas release assembly (10) comprises: a compressed air injection pipeline (11), a gas storage release buffer tank (12) and a pulse airflow injection pipeline (13); The compressed air injection pipeline (11) is connected to the air storage release buffer tank (12), and compressed air is injected into the air storage release buffer tank (12); The air storage release buffer tank (12) temporarily stores compressed air and is connected to the backwashing pipeline (8) via the pulse airflow injection pipeline (13), and intermittently injects pulse airflow into the backwashing pipeline (8) via the pulse airflow injection pipeline (13).

8. The plate heat exchanger cleaning device according to claim 7, It is characterized in that The compressed air injection pipeline (11) is provided with a second isolation valve (14) for controlling the amount of compressed air.

9. The plate heat exchanger cleaning device according to claim 7, It is characterized in that The gas storage release buffer tank (12) is provided with a pressure gauge for monitoring the internal air pressure thereof, the bottom of the gas storage release buffer tank (12) is provided with a drainage pipe (15), and the drainage pipe (15) is provided with a drainage valve (16).

10. The plate heat exchanger cleaning device according to any one of claims 7 to 9, It is characterized in that The pulse airflow injection pipeline (13) is provided with a check valve (17).

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