WO2013085332A1

WO2013085332A1 - Multistage washing apparatus for a plate-type heat exchanger

Info

Publication number: WO2013085332A1
Application number: PCT/KR2012/010615
Authority: WO
Inventors: 공경석
Original assignee: 주식회사 대일
Priority date: 2011-12-08
Filing date: 2012-12-07
Publication date: 2013-06-13
Also published as: KR101115445B1; KR20120005419A

Abstract

The present invention relates to a washing apparatus capable of washing the interior of a plate-type heat exchanger. More particularly, the present invention relates to a multistage washing apparatus for a plate-type heat exchanger capable of moving multistage washing tubes in a horizontal direction along a fluid pipeline and through holes of heat transfer plates communicating with the fluid pipeline so as to reduce the flow channel for the fluid provided in the interior of the plate-type heat exchanger and thus form a strong and high flow velocity, enabling the main flow of the fluid to be applied only through the area of the heat transfer plates that corresponds to the fluid outlet ports of multistage washing tubes, and performing the above-described processes in stages along the overall width of the installed heat transfer plates. Thus, a variety of foreign substances, scale, slime, or the like attached to each heat transfer plate can be removed in a significantly quick and effective manner by means of the high flow velocity and vortex flow. Further, the washing apparatus of the present invention may further maximize washing performance for a plate-type heat exchanger in conjunction with existing washing balls, washing threads, bubbles, or washing liquid.

Description

Multi-stage cleaning device for plate heat exchanger

The present invention is to reduce the flow path of the fluid provided in the plate heat exchanger to move the multi-stage washing tube to create a strong and high flow rate in the horizontal direction along the through-holes of the fluid pipe and the heat transfer plate in communication with it, while the fluid outlet of the multi-stage cleaning tube The main flow of fluid is applied only through the heat transfer plate area corresponding to the heat transfer plate, and this process is performed step by step throughout the installation width of the heat transfer plate, so that various foreign substances, scales, and slimes attached to each heat transfer plate are applied. The present invention relates to a multi-stage scrubbing apparatus for a plate heat exchanger, which enables the lamp to be removed very quickly and effectively by a strong and fast flow rate and vortex.

Generally, as shown in FIG. 1, the plate heat exchanger 1 arranges a plurality of heat transfer plates 4 having a gasket 5 mounted therebetween between the front plate 2 and the rear plate 3, and the front plate 2. A bar bolt 9 is inserted along the assembling

holes

2a and 3a formed in the plate 2 and the rear plate 3 and the assembling grooves 4b formed in the respective heat transfer plates 4 so that the front plate 2 and the rear plate are inserted. By connecting the plate 3 integrally, a plurality of heat transfer plates 4 are pressed against each other between the front plate 2 and the rear plate 3 to form a heat transfer plate block (6).

In addition, the front plate 2 has a pair of inflow pipes 7 and first discharge pipes 8a consisting of a first inflow pipe 7a and a second inflow pipe 7b for circulation of the heat transfer fluid and the heat transfer fluid. ) And a pair of discharge pipes (8) consisting of a second discharge pipe (8b) is installed as a fluid pipe, and each heat transfer plate (4) corresponding to the inlet pipe (7) and the discharge pipe (8) to provide a fluid passage Four through holes 4a are formed at each corner, and the gasket 5 is a known flow path adjusting and sealing means for allowing the heat transfer fluid and the heat transfer fluid to flow alternately with the heat transfer plate 4 interposed therebetween.

The plate heat exchanger (1) as described above is formed on the surface of the heat transfer plate (4), which is a thin metal plate, with various uneven patterns for inducing vortex flow. Excellent heat transfer performance compared to other types of heat exchangers because it can be in close contact with each other and close the heat transfer fluid flowing through the heat transfer plate block (6) and the flow time of the heat transfer fluid to ensure sufficient residence time for heat exchange. It is possible to miniaturize and lighten the heat exchanger while providing a 1PASS method and a 2PASS method for improving thermal efficiency and increasing flow rate.

However, the plate heat exchanger (1) as described above was able to improve the heat exchange efficiency between the fluid by the slow flow rate of the heat transfer fluid and the heat transfer fluid flowing through the heat transfer plate block 6, but the slow flow rate of the fluid in any way Due to this, there was a problem that foreign matters, scales, and slimes are very easily attached to the surface of each heat exchanger plate 4, and these foreign matters, scales, and slimes are most deteriorated in the performance of the plate heat exchanger 1. It is a major factor.

In particular, in the case where the plate heat exchanger (1) uses a waste heat recoverer for heating raw water supplied to a culture tank using waste heat from the fish tank of a fish farm, the wastes of feed and fish contained in the fish And various foreign matters, scales, and slime on the surface of the heat transfer plate 4 due to the protein component, etc., in a very large amount of time. Therefore, a certain period of time after operation does not allow the waste heat recovery device to function properly. .

In order to clean the interior of the plate heat exchanger (1) widely used in general industrial sites as well as the waste heat recovery device used for fish farms as described above, as a method applied to the present, the washing ball or washing sand (cleaning sand) or bubble (Bubble: microbubble) or washing water containing a cleaning liquid or the like is injected into the plate heat exchanger 1 in the direction of forward and reverse washing.

However, this conventional washing method also does not show any effect due to the slow flow rate of the washing water generated inside the plate heat exchanger 1, and transfers the washing water by injecting the washing water at a high pressure using a pump. Even if the pressure and flow rate in the pipe are increased, the flow rate of the washing water is required due to the structural characteristics of the plate heat exchanger 1 having a large heat exchanger internal space of several to several tens of times beyond the narrow inlet pipe 7. It could not be greatly increased to this level, because of this, despite the additional equipment of the pipe line and the separate device for the storage and injection of the washing water, the washing efficiency of the plate heat exchanger (1) was extremely poor.

In particular, when there is a large amount of foreign matter, scale and slime adhesion, such as the plate heat exchanger (1) used for waste heat recovery for fish farms, it is difficult to expect the cleaning effect in the above manner, so that the plate heat exchanger (for After using 1), the plate heat exchanger (1) is removed, and each plate (4) is washed. Then, the plate heat exchanger (1) is reassembled and used. In terms of both operational and operational efficiency of the heat exchanger, it caused very uncomfortable and unreasonable problems.

The present invention has been made to solve the conventional problems as described above, the multi-stage washing tube to reduce the flow path of the fluid provided inside the plate heat exchanger to create a strong and fast flow rate through the fluid pipe and the heat transfer plate in communication with the In the horizontal direction, the main flow of fluid is applied only through the heat transfer plate region corresponding to the fluid outlet of the multi-stage cleaning tube, and this process is performed step by step over the entire installation width of the heat transfer plate. It is a technical task of the present invention to provide a multi-stage cleaning device for a plate heat exchanger that can remove various foreign matters, scales, slimes, and the like, very quickly and effectively by strong and high flow rates and vortices.

As a means for solving the above technical problem, the washing apparatus of the present invention is installed on the plate side corresponding to the position facing a pair of inlet or outlet pipe provided to the plate heat exchanger or an alternative one of the fluid piping The cleaning device includes a pipe-shaped device housing communicating with the fluid pipe in a straight line through a through hole formed in the heat transfer plate, and a multi-stage provided to be movable along the fluid passage provided by the through hole of the heat transfer plate and the fluid pipe from the device housing. It consists of a cleaning tube and a horizontal feed rod extending through the device housing in the state connected to the rear end of the multi-stage cleaning tube, the multi-stage cleaning tube, the front end is formed by the opening while the horizontal transfer rod is connected The rear end is a closed cylindrical tube, and the rear periphery of the multi-stage cleaning tube The part is characterized in that the fluid outlet is formed incision.

In addition, a pair of guide rods for guiding the movement of the multistage cleaning tube from the inner rear end of the apparatus housing to the inner front end surface of the fluid pipe through the through hole of each heat transfer plate is fixedly installed in parallel, and the multistage cleaning tube. The inner circumferential surface of each of the guide rods through which guide ribs are inserted and formed to protrude, and the length from the front end side of the multi-stage cleaning tube to the fluid ejection port is a plurality of heat transfer plate blocks in close contact with the gasket through the gasket It is made the same as the installation width of, and the cutting width of the fluid outlet is characterized in that more than 1/2 of the installation width of the heat transfer plate block.

In addition, the cleaning device of the present invention is provided on the outside of the device housing comprises a reciprocating transfer mechanism for moving the horizontal transfer rod in the front and rear direction, the reciprocating transfer mechanism is connected to the horizontal transfer rod of the multi-stage cleaning tube A cylindrical feed mechanism having a piston rod or a horizontal feed rod itself as a piston rod, or a drive sprocket rotating by power of a driving motor is connected to a driven sprocket by a chain, and the chain is connected to a horizontal feed rod of a multistage cleaning tube. Of a screw feed mechanism connected to the chain feed mechanism, or a screw shaft rotating with power of a drive motor, screwed along the inside of the horizontal feed rod, or screw screw inserted along the inside of the horizontal feed rod. Manual feeder with handle at rear end or grip for grip at rear end of horizontal feed rod It is characterized by the alternative of the phrase.

According to the present invention as described above, by inserting the multi-stage washing tube into the interior of the fluid passage provided by the through-hole of the fluid pipe and the heat transfer plate to significantly reduce the flow path, the fluid through the fluid ejection port of the multi-stage washing tube and the strong hydraulic pressure and fast The main flow of the fluid is applied only through the heat transfer plate portion of the cleaning area included in the fluid ejection opening of the multistage cleaning tube, and the washing operation of the heat transfer plate is performed more quickly and reliably by the strong flow rate and vortex. There is an effect to, and by moving the multi-stage washing tube step by step along the fluid passage provided by the through hole of the fluid pipe and the heat transfer plate, there is an effect such that the cleaning operation is performed all over the installation width of the heat transfer plate block.

As a result, the washing efficiency of the plate heat exchanger is greatly improved compared to the conventional washing method in which the washing ball, the washing yarn, or the washing water containing the bubble or the cleaning liquid is simply injected into the plate heat exchanger. Not only can a sufficient cleaning effect be obtained by the fluid or the piezoelectric fluid itself, but also when combined with the conventional cleaning method, the washing performance of the plate heat exchanger is further maximized, which is why it is widely used in various industrial sites. It is possible to provide an optimal cleaning device that can be economically and reasonably applied from a heat exchanger to a plate heat exchanger having a large washing load such as a waste heat recovery device for fish farms.

1 is an exploded perspective view showing the structure of a plate heat exchanger;

Figure 2 is a side cross-sectional view of the cleaning device of the present invention installed in a plate heat exchanger.

3 is a cross-sectional view of the main portion of FIG.

Figure 4 is a perspective view of a multi-stage cleaning tube forming the main portion of the cleaning apparatus according to the present invention.

Figure 5 is a side cross-sectional view of the multi-stage cleaning tube shown in FIG.

Figure 6 is a side cross-sectional view showing another embodiment of a multistage cleaning tube.

Figure 7 (a) to (d) is a state of use of the cleaning device according to the invention.

8 to 10 is a state diagram showing the type of reciprocating transfer mechanism applied to the cleaning device of the present invention by type.

11 is an enlarged side view of the main portion of FIG. 10;

12 and 13 illustrate exemplary manual reciprocating transfer mechanisms.

Figure 14 is a side cross-sectional view showing another installation state of the cleaning apparatus according to the present invention.

Hereinafter, described in detail with reference to the accompanying drawings, the present invention for achieving the above object is as follows.

In the cleaning apparatus 10 according to the present invention, as shown in FIG. 2, a plurality of heat transfer plates 4 are closely installed at regular intervals between the front plate 2 and the rear plate 3, and the front plate is disposed. (2) a pair of inlet pipe (7) and discharge pipe (8) for the circulation of the heat transfer fluid and the heat transfer fluid is installed as a fluid pipe, each of the heat transfer plate (4) inlet pipe (7) and discharge pipe ( Normal plate heat exchange with gaskets (5) for alternating flow of heat transfer fluid and the heat transfer fluid therebetween with heat transfer plates (4) interposed therebetween, forming a through hole (4a) corresponding to 8). It is installed based on the machine 1.

In FIG. 2, the arrangement of the heat transfer plate 4 and the gasket 5 is maximized so that the fluid passage provided inside the heat transfer plate block 6 can be more clearly shown by the arrangement of the heat transfer plate 4 and the gasket 5. It is shown briefly, and the heat transfer plate 4 having a very thin thickness and a complicated surface shape is closely adhered to the number of sheets or more with the gasket 5 interposed therebetween to form a very dense and complicated flow path structure. .

1 and 2 illustrate a plate heat exchanger 1 in which a pair of inflow pipes 7 and discharge pipes 8 for circulation of the heat transfer fluid and the heat transfer fluid are installed on the front plate 2. Accordingly, the cleaning device 10 of the present invention is installed on the basis of the rear plate 3, but the inlet pipe 7 and the discharge pipe 8 are divided into the front plate 2 and the rear plate 3 to be installed. In this case, the cleaning device 10 of the present invention may be installed in the front plate (2).

In other words, the cleaning device 10 of the present invention is the front plate (2) or rear plate (3) corresponding to the position facing the inlet pipe (7) or discharge pipe (8) and the heat transfer plate block 6 therebetween. It is also installed on the side, it is also possible to apply both the cleaning device 10 to the first inlet pipe (7a) and the second inlet pipe (7b) or the first discharge pipe (8a) and the second discharge pipe (8b), It is also possible to apply the cleaning device 10 to only one of the pair of inlet pipes 7 and the outlet pipes 8, and the remaining components constituting the plate heat exchanger 1 are shown in FIG. It is made the same as a conventional plate heat exchanger described on the basis.

As shown in FIG. 2 and FIG. 3, the cleaning device 10 of the present invention has a pipe-shaped device housing which communicates in a straight line with the inflow pipe 7 through a through hole 4a formed in the heat transfer plate 4 ( 15), the multi-stage cleaning tube 11 is installed to move along the fluid passage provided by the through hole (4a) and the inlet pipe (7) of the heat transfer plate (4) from the device housing (15), and the multi-stage cleaning tube In the state connected to the rear end of the (11) consists of a horizontal transfer rod 16 extending through the device housing 15 to the outside.

4 and 5, the multi-stage cleaning tube 11 has a cylindrical tube in a state where the front end is formed as an opening 12 and the rear end to which the horizontal transfer rod 16 is connected is blocked. The rear end of the multi-stage cleaning tube 11 has a configuration in which the fluid ejection opening 13 is formed incision, the reinforcing bar 13a is installed in the fluid ejection opening 13, and the horizontal transfer rod 16 is provided. Inside the rear end of the device housing 15 to be penetrated, a sealing ring 15a is installed to prevent leakage of fluid.

Therefore, the outer circumferential surface of the multi-stage cleaning tube 11 is in close contact with the inner circumferential surface of the device housing 15, and is also in close contact with the inner circumferential surface of the fluid passage formed by the through hole 4a of the inlet pipe 7 and the heat transfer plate 4. The opening 12 serves as an inlet for the fluid through the multi-stage washing tube 11, and the fluid outlet 13 serves as a passage for ejecting the fluid toward the heat transfer plate 4.

Due to the structure of the multi-stage cleaning tube 11 as described above, the flow path of the fluid flowing from the inlet pipe 7 is a narrow passage corresponding to the internal space of the multi-stage cleaning tube 11 and the cutting width of the fluid ejection opening 13. It is limited and reduced, which can greatly increase the pressure and flow rate of the fluid discharged to the heat transfer plate 4 side through the fluid ejection opening 13 of the multi-stage washing tube 11.

Although the material of the multi-stage washing tube 11, the horizontal transfer rod 16, and the device housing 15 is preferably made of stainless steel having excellent corrosion resistance and mechanical strength, the cleaning device 10 is lightweight and the multi-stage washing tube 11 is provided. It is also possible to apply a plastic material to prevent wear or damage of the inner circumferential surface of the through hole (4a), and the connection method of the multi-stage washing tube 11 and the horizontal transfer rod 16 is also a welding method, a screwing method, or a link joint. The method may be applied, and the device housing 15 may be detachably mounted to the rear plate 3 with the waterproof packing interposed therebetween for easy repair and maintenance of the cleaning device 10.

In addition, although the fluid ejection opening 13 of the multi-stage washing tube 11 is formed in a single incision having a rectangular shape in the drawing, the shape and the cutting width of the fluid ejection opening 13 can be arbitrarily adjusted. The guide means is applied to move the multistage washing tube 11 from the housing 15 along the fluid passage provided by the through hole 4a of the heat transfer plate 4 and the inflow pipe 7 to be performed more accurately. Even more preferred.

The guide means guides the movement of the multi-stage cleaning tube 11 from the inner end face of the inflow pipe 7 to the inner rear end of the device housing 15 via the through hole 4a of each heat transfer plate 4. While the pair of guide rods 14 are fixed and installed in parallel, the guide ribs 17 through which the guide rods 14 are inserted are formed on the inner circumferential surface of the multi-stage cleaning tube 11.

In the drawing, the guide ribs 17 are provided at the inner leading end and the rear end of the multistage cleaning tube 11, but it is also possible to form the guide ribs 17 over the entire length of the multistage cleaning tube 11. 4 and 5, the guide rod 14 and the guide ribs 17 may be installed on the left and right sides of the multistage cleaning tube 11, and the upper and lower sides of the multistage cleaning tube 11 as shown in FIG. It can also be installed in.

As another component of the present invention, the multistage cleaning tube 11 is moved forward and backward along the fluid passage from the device housing 15 to the inlet pipe 7 through the through hole 4a. The reciprocating transfer mechanism 20, which is associated with the horizontal transfer rod 16, is installed in the rear plate 3 at a position adjacent to the device housing 15, as shown in FIGS. 2 and 3. And a piston rod 22 extending from the cylinder 21 to the rear side in parallel with the horizontal transfer rod 16, and a connecting table 23 connecting the rear end of the piston rod 22 and the horizontal transfer rod 16. Is done.

The cylinder 21 is provided with

ports

21a and 21b connected to a pneumatic pump or a hydraulic pump for the operation of the piston rod 22 in the outgoing operation, while the piston head 22 or the position of the piston head 22 is not shown. By measuring the insertion length and grasping the position of the multi-stage washing tube 11 corresponding thereto, a sensor 21c is installed to automatically control the washing operation of the heat transfer plate block 6 by the multi-stage washing tube 11 step by step. It is also possible to manually control the operation of the cleaning device 10 in accordance with a predesigned value and a manual without using such a sensor 21c.

The process of performing the internal cleaning of the plate heat exchanger 1 using the cleaning device 10 of the present invention having the above configuration will be described in detail with reference to FIGS. Same as

First, the initial state shown in Figure 3 is a multi-stage cleaning tube 11 is inserted into the interior of the device housing 15 through the rear plate (3) is a state that the heat transfer function unique to the plate heat exchanger (1) is performed. When the plate heat exchanger 1 needs to be cleaned in such an initial state, the multi-stage washing tube 11 is moved forward by operating the cylinder 21 of the reciprocating transfer mechanism 20, so that the multi-stage washing tube 11 ) Is set to the one-step position shown in FIG.

When the multi-stage cleaning tube 11 is set to the first stage position as described above, the fluid flowing through the inlet pipe 7 passes through the fluid ejection opening 13 of the multi-stage cleaning tube 11 and is located at the lower portion thereof. The heating plate 4 is blown only to the heat transfer plate 4 side, and since the cleaning passage forms a very narrow flow path compared with the entire fluid passage provided by the through hole 4a of the heat transfer plate 4, 4) The pressure and flow rate of the fluid ejected to the side can be greatly increased.

Therefore, the cleaning operation of the heat transfer plate 4 included in the cleaning region W can be performed very quickly and effectively by using a strong and fast fluid flow rate. As in b) and (c), the cylinder 21 of the reciprocating transfer mechanism 20 is operated to move the multi-stage washing tube 11 backward by one step, so that the remaining heat transfer plate 4 located at the rear side thereof can be The cleaning operation is also performed step by step.

Finally, as shown in (d) of FIG. 7, the front end side of the multistage cleaning tube 11 is spaced apart from the front plate 2 at an interval corresponding to the cleaning area W, while the multistage cleaning tube ( When the fluid ejection opening 13 of 11 is inserted into the apparatus housing 15 via the rear plate 3, the fluid flowing through the inflow pipe 7 is flushed with the frontmost cleaning area of the heat transfer plate block 6 ( Since only W) flows in, the washing operation of the heat transfer plate 4 constituting the corresponding washing area W is also performed, and the washing operation for the entire heat transfer plate 4 is completed through such a series of continuous processes.

On the contrary, based on (a) of FIG. 7, the multi-stage washing tube 11 is further advanced by the first stage cleaning area W along the free space at the front side of the inflow pipe 7 to thereby transfer the heat transfer plate block 6. The washing operation from the foremost side to the rear side of the may be performed based on the fluid outlet 13, and in FIG. 7, the washing operation of the heat transfer plate 4 was divided into a total of four steps, but more than this was performed. It is also possible to carry out in steps.

In other words, on the basis of FIGS. 5 and 7 (c), the cutting width D of the fluid ejection port 13 forms the washing area W in one step, so that the front end side of the multistage cleaning tube 11 is located. The length L from the fluid jet port 13 to the fluid jet port 13 is set to be equal to the installation width of the heat transfer plate block 6, and the cutout width D of the fluid jet port 13 may be adjusted in accordance with the required washing step. .

That is, when the step of washing the heat transfer plate 4 by the multi-stage washing tube 11 is three steps, the cutout width D of the fluid ejection port 13 is 1/3 of the installation width of the heat transfer plate block 6. In the case of 5 steps, the cutting width D of the fluid ejection opening 13 is 1/5 of the installation width of the heat transfer plate block 6, and the washing operation by the multi-stage washing tube 11 is divided in this manner. Although the unit can be adjusted arbitrarily, it is preferable to carry out the dividing unit of a washing | cleaning operation at least 2 steps.

The reason for the limitation of the above range is that it is difficult to significantly increase the pressure and flow rate of the fluid required for the washing operation in the division unit of less than two stages, and the criteria for dividing the stage of the washing operation are the inflow pipe 7 and the discharge pipe. At a level at which the inner diameter of (8) and the diameter of the through hole 4a of the heat transfer plate 4 are the same or similar, a condition in which the flow rate in the through hole 4a is maintained at least 2 m / s or more is preferable.

In addition, the length of the inlet pipe 7 into which the multi-stage washing tube 11 is inserted is the length from the tip of the multi-stage washing tube 11 to the front of the fluid discharge port 13 or the cutting width of the fluid discharge port 13 at the corresponding length. It may be a value obtained by subtracting (D), but it is preferable to form a somewhat longer than this to leave a space for the operation of the multi-stage cleaning tube (11).

As the multistage washing tube 11 is inserted into the fluid passage provided by the through hole 4a of the inflow pipe 7 and the heat transfer plate 4 as described above, the flow path is significantly reduced, so that the multistage washing tube 11 is While the strong and fast fluid flows through the fluid ejection port 13, the strong and rapid fluid flows only through the heat transfer plate 4 of the cleaning area W included in the fluid ejection port 13 of the multistage cleaning tube 11. The flow can be applied.

Therefore, the washing operation of the heat transfer plate 4 can be performed more quickly and reliably by a strong and fast flow rate and vortex, as well as the fluid provided by the inlet pipe 7 and the through hole 4a of the heat transfer plate 4. By moving the multi-stage washing tube 11 stepwise along the passage, this cleaning operation can be performed more reasonably and efficiently over the entire installation width of the heat transfer plate block 6.

Therefore, the washing efficiency can be greatly improved compared to the conventional washing method in which washing water containing washing balls, washing yarns or bubbles or washing liquid is simply injected into the plate heat exchanger 1, and the heating fluid and blood Heat transfer fluid alone can obtain a sufficient cleaning effect.

In particular, when the cleaning device 10 of the present invention in conjunction with the conventional cleaning method can further maximize the cleaning performance of the plate heat exchanger (1), thereby plate heat exchanger (1) widely used in various industrial sites It is possible to provide an optimal cleaning device 10 that can be economically and reasonably applied from the plate heat exchanger (1) with a very large washing load, such as waste heat recovery for fish farms.

Of course, since each heat transfer plate 4 itself is a thin metal plate, it is practically difficult to completely close the leak by closely contacting the outer circumferential surface of the multistage cleaning tube 11 with the inner circumferential surface of each through hole 4a. Although it may leak through the contact surface between the multi-stage washing tube 11 and the through hole 4a, this amount of leakage has little effect on the reduction of the flow path by the multi-stage washing tube 11 and the increase of the flow velocity based thereon. No level.

In addition, since a very small amount of fluid leaked through the contact surface between the multi-stage washing tube 11 and the through hole 4a is discharged to the discharge pipe 8 through the remaining space of the heat transfer plate block 6, the plate heat exchanger as well as the cleaning operation. It does not cause any trouble on the operation side of (1), and even a small amount of fluid may flow into the inside of the device housing 15, but this also does not cause any problem in the operation of the cleaning device 10.

In other words, if the main flow of the strong and fast fluid is applied only through the cleaning area W corresponding to the fluid ejection opening 13 of the multistage cleaning tube 11 in the manner shown in FIG. 7, the plate heat exchanger 1 This means that even a small amount of fluid leakage occurring inside the) can be considered.

8 to 11 show another embodiment of the reciprocating feed mechanism 20 that can be applied to the cleaning apparatus 10 of the present invention, and the one shown in FIG. 8 is a piston for the horizontal feed rod 16 itself. 9 is a cylindrical conveying mechanism made of a rod 22, and a driving sprocket 25 that is rotated by the power of the driving motor 24 is connected to a driven sprocket 26 by a chain 27, and The chain 27 is a chain transfer mechanism that is connected to the horizontal transfer rod 16 by the rod connector 27a.

10 and 11 illustrate a screw-type feed mechanism in which a screw shaft 29 that is rotated by the power of the drive motor 24 is inserted into a screw along the inside of the horizontal feed rod 16. The screw shaft 29 is preferably to be interlocked with the drive motor 24 via the reduction gear 28, each of the reciprocating transfer mechanism 20 is installed on the device bracket 18 mounted to the rear plate (3) It is.

The cylinder 21 is provided with a sensor 21c as described above to control the operation of the cylinder 21 for each position of the multi-stage cleaning tube 11, the rotation speed in the case of the drive motor 24 And it is preferable to use a stepping motor (Stepping motor) capable of fine adjustment of the transport distance by controlling the rotation angle to automatically control the position of the multi-stage cleaning tube (11).

However, if the multi-stage washing tube 11 can be moved forward and backward by using the horizontal transfer rod 16 in addition to the reciprocating transfer mechanism 20 shown in FIGS. Apparatus 20 may be applied, and it will be appreciated that not only automatic control of the reciprocating transfer mechanism 20 but also operation of the cleaning device 10 using a manual reciprocating transfer mechanism is possible.

As a representative example of the manual reciprocating transfer mechanism 20, the rear end portion of the screw shaft 29 is inserted into the screw shaft 29 through the horizontal transfer rod 16, as shown in Figure 12 by the support bracket (31) By rotating the handle 30 on the rear end of the screw shaft 29, the handle 30 is rotated manually so that the front and rear conveyance of the multi-stage cleaning tube 11 can be carried out. For example, to perform a task.

In the simplest method, as shown in FIG. 13, the grip 32 is attached to the rear end of the horizontal transfer rod 16, and the horizontal transfer rod 16 itself is pushed and pulled, thereby multistage cleaning. It is possible to carry out the front and rear transfer operation of the tube 11, and in some cases, the multi-stage washing tube in the state of holding the horizontal transfer rod 16 itself without installing the grip handle 32 separately ( You can also carry out the forward and backward transfer operations in 11).

FIG. 14 is a view illustrating a state in which the cleaning device 10 of the present invention is installed in correspondence with the discharge pipe 8 of the plate heat exchanger 1, and the fluid ejection port 13 of the multi-stage cleaning tube 11 has a heat transfer plate 4. It is formed on the periphery of the rear side upper surface of the multi-stage cleaning tube 11 to correspond to the side, in addition to the rest of the configuration constituting the cleaning device 10 and the cleaning principle of the heat transfer plate 4 is made the same as described above.

That is, the flow path of the fluid discharged through the heat transfer plate block 6 to the discharge pipe 8 is significantly reduced by the multi-stage washing tube 11 and the fluid jet port 13, so that the cleaning area W corresponding to the fluid jet port 13 is reduced. Only the heat transfer plate (4) included in the) is applied to the discharge flow of strong water pressure and fast flow rate, and through the remaining heat transfer plate (4) is such that the discharge flow is not applied.

Thus, even when the cleaning device 10 is installed in association with the discharge pipe 8, similarly to the cleaning device 10 associated with the inflow pipe 7, the heat transfer plate 4 included in the cleaning area W is cleaned. It is possible to perform the work quickly and effectively by the strong and fast flow rate and vortex, as shown in Figure 7 by moving the multi-stage washing tube 11 in the front and rear direction, the cleaning operation for the entire heat transfer plate block (6) Can be done.

On the other hand, the cleaning device 10 of the present invention is installed at positions corresponding to the first inlet pipe 7a and the second inlet pipe 7b or the first discharge pipe 8a and the second discharge pipe 8b, or In the case of installing a total of two in one discharge pipe (7) and one inlet pipe (8) each, when each cleaning device 10 is adjacent to one of the two cleaning devices (one reciprocating transfer mechanism 20) It is preferable to operate 10) simultaneously, and when each cleaning apparatus 10 is separated, it is preferable to apply the reciprocating transfer mechanism 20 separately for each cleaning apparatus 10, and each cleaning apparatus 10 Of course, it is also possible to apply a different type of reciprocating transfer mechanism 20 for each.

The present invention is installed in a plate heat exchanger is a multi-stage cleaning device for a plate heat exchanger that can remove various foreign substances, scales and slimes attached to each heat transfer plate very quickly and effectively by strong and fast flow rate and vortex The present invention relates to an industrially available invention.

Claims

A plurality of heat transfer plates 4 are closely installed at regular intervals between the front plate 2 and the rear plate 3, and the front plate 2 has a pair of inflows for circulation of the heat transfer fluid and the transfer fluid. The pipe 7 and the discharge pipe 8 are installed as a fluid pipe, and each of the heat transfer plates 4 is provided with a through hole 4a corresponding to the inflow pipe 7 and the discharge pipe 8 to provide a fluid passage. In the plate heat exchanger (1) provided with a gasket (5) for allowing the heat transfer fluid and the heat transfer fluid to flow alternately with the heat transfer plate (4) in between,

The cleaning device 10 of the plate heat exchanger 1 is installed on the rear plate 3 side corresponding to a position facing the pair of inflow pipes 7 and the discharge pipes 8 or one of the fluid pipes. ,

The cleaning device (10) is a pipe-shaped device housing (15) which communicates in a straight line with the fluid pipe via a through hole (4a) formed in the heat transfer plate (4), and the heat transfer plate (4) from the device housing (15) The through-stage 4a and the multi-stage washing tube 11 is installed to be movable along the fluid passage provided by the fluid pipe, and the device housing 15 in the state connected to the rear end of the multi-stage washing tube 11 It consists of a horizontal transfer rod 16 extending to the outside,

The multi-stage cleaning tube 11 is a cylindrical tube in a state in which the front end portion is formed by the opening 12, the rear end portion to which the horizontal transfer rod 16 is connected is blocked, the rear peripheral edge of the multi-stage washing tube 11 The multi-stage cleaning device for a plate heat exchanger, characterized in that the fluid outlet 13 is formed incision.
The method of claim 1, wherein the movement of the multi-stage cleaning tube (11) from the inner rear end of the device housing (15) through the through hole (4a) of each heat transfer plate (4) to the inner end surface of the fluid pipe. A pair of guide rods 14 are fixed in parallel,

Multi-stage cleaning device for a plate heat exchanger, characterized in that the guide ribs (17) through which the guide rods (14) are inserted to protrude from the inner circumferential surface of the multi-stage cleaning tube (11).
The length L from the front end side of the multi-stage washing tube 11 to the fluid ejection opening 13 is a state in which a plurality of heat transfer plates 4 are interposed between the gaskets 5. It is made to be the same as the installation width of the heat transfer plate block 6 in close contact,

The cutting width (D) of the fluid ejection opening 13 is a multi-stage cleaning device for a plate heat exchanger, characterized in that more than 1/2 of the installation width of the heat transfer plate block (6).
3. The cleaning device (10) according to claim 1 or 2, wherein the cleaning device (10) includes a reciprocating transport mechanism (20) installed outside the device housing (15) to move the horizontal transport rod (16) in the forward and backward directions. Done,

The reciprocating transfer mechanism 20,

A cylindrical feed mechanism having a piston rod 22 connected to the horizontal feed rod 16 of the multi-stage washing tube 11 or the horizontal feed rod 16 itself as the piston rod 22;

Alternatively, the drive sprocket 25 which is rotated by the power of the drive motor 24 is connected to the driven sprocket 26 by the chain 27 and the chain 27 is the horizontal feed rod 16 of the multi-stage cleaning tube 11. Chain transfer mechanism connected with

Or a screw feed mechanism in which a screw shaft 29 that is rotated by the power of the drive motor 24 is inserted into a screw along the inside of the horizontal feed rod 16;

Alternatively, the handle 30 is installed at the rear end of the screw shaft 29 screwed along the inside of the horizontal feed rod 16, or the grip 32 for the grip end is provided at the rear end of the horizontal feed rod 16. Multi-stage cleaning device for a plate heat exchanger, characterized in that the alternative from the manual feed mechanism installed.
According to claim 3, wherein the cleaning device 10 is formed outside the device housing 15 comprises a reciprocating transfer mechanism 20 for moving the horizontal transfer rod 16 in the front and rear directions,

The reciprocating transfer mechanism 20,

A cylindrical feed mechanism having a piston rod 22 connected to the horizontal feed rod 16 of the multi-stage washing tube 11 or the horizontal feed rod 16 itself as the piston rod 22;

Alternatively, the drive sprocket 25 which is rotated by the power of the drive motor 24 is connected to the driven sprocket 26 by the chain 27 and the chain 27 is the horizontal feed rod 16 of the multi-stage cleaning tube 11. Chain transfer mechanism connected with

Or a screw feed mechanism in which a screw shaft 29 that is rotated by the power of the drive motor 24 is inserted into a screw along the inside of the horizontal feed rod 16;

Alternatively, the handle 30 is installed at the rear end of the screw shaft 29 screwed along the inside of the horizontal feed rod 16, or the grip 32 for the grip end is provided at the rear end of the horizontal feed rod 16. Multi-stage cleaning device for a plate heat exchanger, characterized in that the alternative from the manual feed mechanism installed.