KR20040062919A - heat exchanger tube auto cleaning system using ejector - Google Patents

Abstract

PURPOSE: An apparatus for automatically cleaning a heat exchanger tube using an ejector is provided to put and recover a cleaning object by combining a general purpose pump with an ejector, thereby reducing the manufacturing cost and an installation space. CONSTITUTION: A bypass pipe is installed at a cleaning object separator exit fluid outlet pipe(4) to connect an ejector(6) at an appropriate position, wherein the bypass pipe is formed of an ejector driving fluid inlet pipe(11) and an ejector driving fluid outlet pipe(12). An ejector suction port(6-2) is connected with a cleaning object returning fluid pipe(10) connected with a fluid outlet(6-3) of a lower part of a cleaning object recovering element(5). An ejector driving pump(7) is installed at the ejector driving fluid inlet pipe. An electromotive valve(14) is installed at the ejector driving fluid outlet pipe. If the electromotive valve is shut and the ejector driving pump is operated, a cleaning object(17) is put into an entrance of a heat exchanger(2). If the electromotive valve is open and the ejector driving pump is operated, the cleaning object is recovered from a cleaning object separator(3).

Description

Heat exchanger tube auto cleaning system using ejector}

Conventionally, shell & tube type heat exchangers in which a plurality of tubes are arranged inside a cell have been used in a refrigerating device or a chemical plant. Most of the fluids used as heat medium in this type of heat exchanger are used in the cooling tower. When the heat exchanger is used for a long time, foreign substances such as microorganisms and dusts in the air flow into the fluid, and they accumulate on the inner surface of the heat exchanger tube to form deposits such as scale and slime. There is a problem such as this, it is necessary to clean these deposits regularly.

As the apparatus for cleaning the deposit, a heat exchanger tube cleaning apparatus has been conventionally used to remove deposits on the inner wall of a tube by forcibly passing it through a fluid flow into a tube using a cleaning body such as a sponge ball.

As a heat exchanger tube cleaning device generally used in the past, as shown in Figure 3, there is a method using compressed air, by opening the automatic valve for compressed air input connected to the tank in which the compressed air is stored to open air Pressurize the upper part of the cleaning liquid storage tank to raise the water to inject the cleaning liquid, and when recovering the cleaning liquid, open the compressed air discharge automatic valve to discharge the air filled in the cleaning liquid storage tank to clean the cleaning liquid storage tank. It is a washing apparatus of a type which collect | recovers a washing | cleaning body by suctioning a fluid into it.

However, in this method of using compressed air, when the time for opening the compressed air input automatic valve is long, air is introduced into the pipe, and if it is short, the input of the cleaning body is not complete, and the time for opening the automatic valve for compressed air discharge is long. Ground fluid can flow out of the device. In addition, when the automatic valve is opened and closed to insert or retrieve the cleaning body, air pressure is suddenly applied or removed, causing severe noise from the check valve by the water hammer, and there is a risk of damage. In addition, due to the limited tank capacity, the recovery time of the cleaning body cannot be taken due to the limited tank capacity, and the cleaning body is not completely recovered. As a result of the gathering, the cleaning body temporarily stops in the cleaning body separator due to the recovery process, which causes various problems such as pressure loss occurring in the cleaning body separator and the cleaning body wear is promoted.

The heat exchanger tube automatic cleaning device using the eject of the present invention is an apparatus for automatically cleaning by injecting and recovering a cleaning material into the heat exchanger tube by using an ejector, an ejection driving pump and an electric valve, and driving the ejection driving pump. If the electric valve installed in the ejection driving fluid flow conduit is closed in one state, fluid flows toward the ejection fluid inlet, the ejection suction port, the cleaning conveying fluid conduit, the cleaning body returning device, and the cleaning body inlet conduit. On the contrary, when the electric valve is opened, fluid flows toward the cleaning body separator, the cleaning body return conduit, the cleaning body return conduit, the cleaning body return fluid conduit, and the ejection suction port by the original function of the ejection, thereby recovering the cleaning body from the cleaning body separator. It is intended to be configured to be possible. In other words, by using a combination of pump and eject, it is possible to input and recover the cleaning body without using the expensive cleaning body circulation pump without changing the rotation direction of the pump in the forward direction and the reverse direction for a certain time for the cleaning body input and recovery. To be configured. In addition, when the opening and closing interval of the electric valve is properly set, it is possible to start the recovery as soon as the cleaning body passes through the heat exchange and reaches the cleaning body separator, thereby preventing the pressure loss and cleaning body wear caused by the temporary stopping of the cleaning body in the cleaning body separator. For the purpose of

1 is a block diagram of a heat exchanger tube automatic cleaning device using the eject of the present invention.

Figure 2 is a block diagram showing another embodiment of the heat exchanger tube automatic cleaning device using the eject of the present invention.

3 is a block diagram of a conventional heat exchanger tube automatic cleaning device.

<Description of the code | symbol about the principal part of drawing>

1 fluid inlet conduit 2 heat exchanger

3: cleaning body separator 3-1: cleaning body separator

3-2: cleaning body outlet 4: fluid outlet conduit

5: cleaning body recovery machine 6: ejector (ejector)

6-1: fluid inlet 6-2: suction port

6-3: Fluid outlet 7: Eject drive pump

8: cleaning body recovery conduit 9: cleaning body injection conduit

10: cleaning fluid conveying conduit 11: ejection driving fluid input conduit

12: Eject driven fluid outflow conduit 13: Check valve

14: electric valve 15: manual valve

16: fluid circulation pump 17: cleaning body

18: compressed air storage tank 19: cleaning material storage tank

20: automatic valve for compressed air injection 21: automatic valve for compressed air discharge

Looking at the heat exchanger tube automatic cleaning device using the eject of the present invention for achieving the above object in detail according to the drawings presented as follows.

As shown in FIG. 1, the fluid circulation pump, the fluid inlet conduit, the heat exchanger, the scrubber separator, and the fluid outlet conduit are sequentially connected in series, and the fluid inlet conduit and the scrubber separator of the heat exchanger inlet side are sequentially connected. A heat exchanger tube automatic cleaning device having a cleaning body return conduit connected to a cleaning body inlet conduit and a cleaning body return conduit respectively installed in parallel with a heat exchanger, wherein the ejector driving fluid inlet conduit is provided at the outlet of the cleaning body separator. By-pass conduit consisting of and an ejection driving fluid outflow conduit is installed to connect the ejector at an appropriate position, and the ejection suction port is connected to the cleaning medium return fluid conduit connected to the fluid outlet of the lower part of the cleaning body recoverer. The ejection drive fluid inlet conduit is provided with an ejection drive pump, and the ejection drive fluid outlet conduit is provided with an electric valve. If the electric valve is closed and the ejection drive pump is operated, the cleaning body is injected into the heat exchanger inlet side, and if the opening of the electric valve is operated and the ejection driving pump is operated, the cleaning body is recovered from the cleaning body separator. It relates to a heat exchanger tube automatic cleaning device used.

Looking at the operating method of the heat exchanger tube automatic cleaning device using the eject of the present invention configured as described above, the cleaning body is stored in the cleaning body recoverer, the ejection drive pump is in a stopped state and the electric valve is closed state is ready state When the ejection drive pump is operated with the electric valve closed, some of the fluid in the fluid outflow conduit is sucked into the ejection drive fluid inlet conduit, and then passes through the cleaning carrier return fluid conduit. It flows in the order of stagnation collector, scrubbing body conduit, heat exchanger, scrubber separator, and fluid outflow conduit. In this case, the scrubbing body in scrubber recovery takes on the flow of fluid and is introduced into the heat exchanger. The following is a recovery process. When the electric valve is opened while the eject driving pump is maintained in operation, some of the fluid in the fluid outflow conduit flows through the eject driving fluid inlet conduit and the eject driving fluid outflow conduit, and is operated by the original function of the eject. The suction force is generated through the ejection suction port so that some fluid in the cleaning separator flows in the order of the cleaning body return conduit, the cleaning body return conduit, and the return conveying fluid conduit to flow into the ejection driving fluid outflow conduit. Is recovered into the scrubbing unit.

In addition, as another embodiment of the heat exchanger tube automatic cleaning device using the eject of the present invention, as shown in Figure 2, the ejection driving fluid inlet conduit is connected to the ejection fluid inlet conduit of the fluid circulation pump and the fluid inlet of the ejector The suction port of the ejector is connected to the cleaning body inlet conduit, the fluid outlet is connected to the ejection drive fluid outlet conduit, and is eventually connected to the fluid inlet conduit of the heat exchanger inlet, and the ejection driving pump is connected to the ejection driving fluid inlet conduit. And an electric valve is installed in the cleaning body introduction conduit between the cleaning body conveying fluid conduit, the cleaning body conveying fluid conduit, and the cleaning body inlet conduit between the cleaning body returning machine and the ejection driving pump. Closing the electric valve installed in the conduit and opening the electric valve installed in the cleaning body injection conduit, the cleaning body circulation is made, the eject drive pump The heat exchanger tube automatic cleaning device using the eject can be configured by opening the electric valve installed in the cleaning body conveying conduit and closing the electric valve installed in the cleaning body introduction conduit while the pump is in operation. .

Looking at the operation method of the heat exchanger tube automatic cleaning device using the eject according to another embodiment configured as described above, the cleaning body is stored in the cleaning body recovery machine, the ejection drive pump is stopped and all the electric valve is closed When the ejection drive pump is operated while the power valve installed in the cleaning body conveying conduit is closed and the power valve installed in the cleaning body inlet conduit is open, the fluid in the fluid inlet conduit A part is sucked into the eject driving fluid inlet conduit and flows to the heat exchanger through the cleaning body inlet conduit connected to the inlet side of the heat exchanger. Also, the fluid in the cleaning body collector is also introduced into the cleaning body inlet conduit and heat exchanger by the suction force according to the flow of the fluid. , The circulating fluid flows in the order of cleaning body separator and cleaning body recovery conduit. Standing stagnant in the three years payback period of stagnation and even capitalize on the fluid flow consists of two process input heat exchanger. The next cleaning body recovery process is to open the electric valve installed in the cleaning body conveying conduit and close the electric valve installed in the cleaning body inlet conduit while maintaining the operation state of the ejection driving pump. Although very similar fluid flow is achieved, the difference is that the fluid in the cleaner return flows through the cleaning carrier fluid conduit connected to the fluid outlet of the lower part of the cleaning device.

Since the types and functions of the fluid circulation pump, the fluid inlet conduit, the heat exchanger, the scrubber separator, the fluid outlet conduit, the ejection drive pump, the ejector, the electric valve, etc. are generally performed in public by the relevant company, the detailed description will be provided. Omitted, the main subject of the present invention is an efficient configuration using the same.

Heat exchanger tube automatic cleaning device using the eject of the present invention is configured as described above by utilizing a combination of the general purpose pump and the ejector to clean and put in the cleaning body, the configuration of the device is very simple, less trouble of trouble, less installation space and production cost Is cheaper. In addition, since the pump rotation direction does not have to be switched in the forward and reverse directions every predetermined time for the input and recovery of the cleaning body, pump failure can be greatly reduced. In addition, the cleaning body is a very useful invention that can prevent the cleaning body damage by the pump because it can be added and recovered without passing directly through the pump.

Claims (2)

The fluid circulation pump 16, the fluid inlet conduit 1, the heat exchanger 2, the scrubber separator 3, and the fluid outlet conduit 4 are sequentially connected in series, and the fluid at the inlet side of the heat exchanger 2 is The cleaning body inlet conduit 9 and the cleaning body return conduit 8 are connected to the cleaning body outlet 3-2 of the inlet conduit 1 and the cleaning body separator 3, respectively, so as to be connected in parallel with the heat exchanger 2. A stag harvester 5 is installed, and the bypass fluid outlet conduit 4 of the scrubber separator 3 is composed of an eject driving fluid inlet conduit 11 and an eject driving fluid outflow conduit 12. A conduit is installed to connect the ejector 6 to a proper position, and the ejector 6 suction port 6-2 is connected to the cleaning medium conveying fluid conduit 10 connected to the fluid outlet of the lower part of the cleaning body recoverer 5. Is connected to, the ejection drive fluid inlet conduit 11, the ejection drive pump 7 is installed, the ejection drive fluid flow conduit 12 is provided with an electric valve 14, When the valve 14 is closed and the eject driving pump 7 is operated, the cleaning body 17 is introduced into the heat exchanger 2 inlet. When the valve 14 is opened, the eject driving pump 7 is operated. Heat exchanger tube automatic cleaning device using the ejector, characterized in that the cleaning body 17 is recovered from the stagnation separator (3). The fluid circulation pump 16, the fluid inlet conduit 1, the heat exchanger 2, the scrubber separator 3, and the fluid outlet conduit 4 are sequentially connected in series, and the fluid at the inlet side of the heat exchanger 2 is The cleaning body inlet conduit 9 and the cleaning body return conduit 8 are connected to the inlet conduit 1 and the cleaning body outlet 3-2 of the cleaning body separator 3, respectively. A stag harvester 5 is provided, and a purge conveying fluid conduit 10 is connected to the fluid outlet of the lower part of the purge recovering body 5 to be connected to the purge inlet conduit 9, and the discharge side of the fluid circulation pump 16 is connected. An ejection driving fluid inlet conduit 11 is connected to the fluid inlet conduit 1 so as to be connected to the fluid inlet 6-1 of the ejector 6, and the suction port 6-2 of the ejector 6 is a cleaning body. It is connected to the inlet conduit (9) and the fluid outlet (6-3) is connected to the ejection drive fluid outflow conduit 12, and eventually connected to the inlet side fluid inlet conduit (1) of the heat exchanger (2), the ejection drive fluid To the input conduit (11) A tweezers pump 7 is provided, respectively, in the cleaning body introduction conduit 9 between the cleaning body conveying fluid conduit 10, the point where the cleaning body conveying fluid conduit 10 is connected, and the cleaning body returning machine 5. The electric valve 14 is installed, and the electric valve 14 installed in the cleaning body introduction conduit 9 is closed by closing the electric valve 14 installed in the cleaning body conveying fluid conduit 10 while the ejection drive pump 7 is operated. 14, the cleaning body (17) is circulated, and while the ejection drive pump (7) is operated, the electric valve (14) installed in the cleaning body conveying fluid conduit (10) is opened, and the cleaning body inlet conduit (9) is opened. Heat exchanger tube automatic cleaning device using the ejector, characterized in that the cleaning body 17 is recovered by closing the electric valve (14) installed in the.