Disassembly-free cleaning device for plate heat exchanger and cleaning method thereof

Abstract

The invention relates to a plate heat exchanger disassembly-free cleaning device and a cleaning method thereof, and belongs to the field of plate heat exchangers. A water inlet of the water pump is connected with an inner cavity of the water tank, and a water outlet of the water pump is connected with an electric contact pressure gauge, one end of a first valve and one end of a fourth valve through a fifth valve. And the other end of the second valve is connected with the inner cavity of the water tank. The first valve and the second valve are opened, the third valve and the fourth valve are closed, the upper limit pressure value of a cleaning medium is set through an electro connecting pressure gauge, a water pump is started, forward cleaning is conducted on the plate heat exchanger, and after a period of time, the third valve and the fourth valve are opened, the first valve and the second valve are closed, and reverse cleaning is conducted on the plate heat exchanger; in the cleaning process, the pressure of the cleaning medium is adjusted through the fifth valve, and the machine is stopped after the upper limit pressure is exceeded.

Description

Technical Field

[0001] The present invention relates to the field of heat exchangers, and more specifically to a device for cleaning a plate heat exchanger without disassembly and its cleaning method. Background Art

[0002] As is well known, after a plate heat exchanger has been used for a period of time, a layer of cooling water medium dirt will accumulate on the internal plates, directly affecting the cooling effect of the plate heat exchanger, and thus it is necessary to clean the plate heat exchanger.

[0003] The traditional cleaning method is to disassemble the plate fixing plates of the plate heat exchanger, brush each plate one by one, and then reassemble and use the plates. This cleaning method is time-consuming and laborious, and repeated cleaning in this way will also cause irreversible damage to the seals between the plates of the plate heat exchanger. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a device for cleaning a plate heat exchanger without disassembly and its cleaning method, which can avoid the large labor and time costs caused by disassembling the plate heat exchanger, and at the same time, will not cause damage to the seals of the plate heat exchanger.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a device for cleaning a plate heat exchanger without disassembly, provided with a plate heat exchanger and a water tank. It is characterized in that the water inlet of the water pump is connected to the inner cavity of the water tank, the water outlet of the water pump is connected to an electric contact pressure gauge, one end of a first valve and one end of a fourth valve through a fifth valve, the other end of the first valve is connected to the plate heat exchanger and one end of a third valve through a connecting pipe, the other end of the third valve is connected to the inner cavity of the water tank, the other end of the fourth valve is connected to the plate heat exchanger and one end of a second valve through another connecting pipe, and the other end of the second valve is connected to the inner cavity of the water tank.

[0006] A method for cleaning using the above-mentioned device for cleaning a plate heat exchanger without disassembly is characterized in that the first valve and the second valve are opened, the third valve and the fourth valve are closed, the upper limit pressure value of the cleaning medium is set through the electric contact pressure gauge, the water pump is started, and the plate heat exchanger is cleaned forward. After a period of time, the third valve and the fourth valve are opened, the first valve and the second valve are closed, and the plate heat exchanger is cleaned backward. During the cleaning process, the pressure of the cleaning medium is adjusted through the fifth valve, and when the upper limit pressure set by the electric contact pressure gauge is exceeded, the protection shutdown is implemented.

[0007] The beneficial effect of the present invention is that the plate heat exchanger is continuously cleaned forward and backward repeatedly, thereby effectively removing the dirt inside the plate heat exchanger. Brief Description of the Drawings

[0008] The present invention will be further described below with reference to the drawings and embodiments.

[0009] Figure 1Schematic structural diagram of the present invention.

[0010] In the figure: 1. Plate heat exchanger; 2. Water tank; 3. Water pump; 4. First valve; 5. Second valve; 6. Third valve; 7. Fourth valve; 8. Fifth valve; 9. Electric contact pressure gauge; 10. Connecting pipe. Specific implementation manner

[0011] In the figure, the present invention is provided with a plate heat exchanger 1 and a water tank 2. The water inlet of the water pump 3 is connected to the inner cavity of the water tank 2. The water outlet of the water pump 3 is connected to the electric contact pressure gauge 9, one ends of the first valve 4 and the fourth valve 7 through the fifth valve 8. The other end of the first valve 4 is connected to the plate heat exchanger 1 and one end of the third valve 6 through the connecting pipe 10. The other end of the third valve 6 is connected to the inner cavity of the water tank 2. The other end of the fourth valve 7 is connected to the plate heat exchanger 1 and one end of the second valve 5 through another connecting pipe. The other end of the second valve 5 is connected to the inner cavity of the water tank 2.

[0012] The cleaning method is as follows: Open the first valve 4 and the second valve 5, close the third valve 6 and the fourth valve 7, and set the upper limit pressure value of the cleaning medium through the electric contact pressure gauge 9. Start the water pump 3 to conduct forward cleaning on the plate heat exchanger 1 to remove the dirt deposited on the plates; after a period of time, open the third valve 6 and the fourth valve 7, close the first valve 4 and the second valve 5, and conduct reverse cleaning on the plate heat exchanger 1 to further loosen and peel off the dirt on the plates. During the cleaning process, adjust the pressure of the cleaning medium through the fifth valve 8, and stop the machine for protection when the upper limit pressure set by the electric contact pressure gauge 9 is exceeded. By opening and closing the control valves, the switching of the forward and reverse cleaning pipelines is realized to continuously conduct forward and reverse repeated cleaning on the plate heat exchanger until the dirt inside is cleaned out.

Claims

1. A device for cleaning a plate heat exchanger without disassembly, comprising a plate heat exchanger and a water tank, characterized in that, The water inlet of the water pump is connected to the inner cavity of the water tank. The water outlet of the water pump is connected to the electric contact pressure gauge, one end of the first valve and one end of the fourth valve through the fifth valve. The other end of the first valve is connected to the plate heat exchanger and one end of the third valve through a connecting pipe. The other end of the third valve is connected to the inner cavity of the water tank. The other end of the fourth valve is connected to the plate heat exchanger and one end of the second valve through another connecting pipe. The other end of the second valve is connected to the inner cavity of the water tank.

2. A method for cleaning by using the plate heat exchanger disassembly-free cleaning device described in claim 1, characterized in that Open the first valve and the second valve, close the third valve and the fourth valve. Set the upper limit pressure value of the cleaning medium through the electric contact pressure gauge, start the water pump, and conduct forward cleaning on the plate heat exchanger. After a period of time, open the third valve and the fourth valve, close the first valve and the second valve, and conduct reverse cleaning on the plate heat exchanger. During the cleaning process, adjust the pressure of the cleaning medium through the fifth valve. When the pressure exceeds the upper limit pressure set by the electric contact pressure gauge, the equipment protection stops.

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