KR102457992B1 - Heat-exchanger possible for removing scale of heat exchanging tube on operating - Google Patents

Abstract

The present invention relates to a heat exchanger capable of removing a scale of a heat transfer tube during an operation. The heat exchanger, in which a heat transfer block disposed with heat transfer tubes across a widthwise direction and a heightwise direction is installed inside a heat exchange tank with a scale cleaning device together and the cleaning device has a link shaft penetrating upper and lower ends of a pair of scrapers penetrating the heat transfer block in the height direction and which is connected and installed to a driving plate and a vertical motion plate, respectively, on which the link shaft on the upper and lower ends angularly moves through power of a driving motor, connects a driving shaft of the driving plate and a vertical motion shaft of the vertical motion plate on an outside of the heat exchanger through a chain motion device in a state where a link structure of the scraper including the driving plate and the vertical motion plate is entirely inserted into the heat exchange tank; forming C-shaped and U-shaped hanger loop units, respectively, inserted by the link shaft on the upper and lower ends of the scraper; assembles separation prevention pins of the link shaft to an entrance side of each hanger loop; allows the heat transfer tube to be a rectangular pipe and adhere to the heightwise direction of the heat transfer block; and sequentially connects and installs a storage chamber and a collection tank provided with a valve opening and closing-type emission pipe and a drain pipe, respectively, on a lower part of the heat exchange tank. Accordingly, the heat exchanger capable of removing scale from the heat transfer tube during an operation can secure efficient and stable operations of the scale cleaning device, enable easier installation, repair, replacement, and the like therefor, and safely discharge the scale removed from the heat transfer tube to outside of the heat exchange tank without a leakage of fluids.

Description

Heat exchanger capable of removing scale of heat exchanging tube during operation {Heat-exchanger possible for removing scale of heat exchanging tube on operating}

According to the present invention, a hexahedral heat transfer block in which heat transfer tubes are arranged at regular intervals in the width and height directions is inserted and installed in the heat exchange tank together with a scale cleaning device on the outer surface of the heat transfer tube, and the cleaning device removes the heat transfer block A pair of scrapers penetrating in the height direction are disposed between the heat transfer tubes in the width direction of the heat transfer block, and link shafts are installed through the upper and lower sides of each scraper, and the upper and lower link shafts are driven It relates to a heat exchanger capable of removing the scale of a heat transfer tube during operation, which is installed connected to a driving plate and a driven plate each moving by the power of a motor.

In general, a heat exchanger is a device that performs heat exchange between a first fluid (heat transfer fluid) and a second fluid (heat transfer fluid), and is a heater or cooler or an evaporator or condenser in various industrial plants including various refrigeration equipment and air conditioning equipment. It is widely used for a wide range of purposes, such as, and is mainly used to transfer the thermal energy of a high-temperature fluid (heat-transfer fluid) to a low-temperature fluid (heat-transfer fluid), but it can also be used for the opposite purpose of heat exchange.

The heat exchanger as described above is roughly divided into a shell & tube type heat exchanger, a shell & fin-tube type heat exchanger, and a plate type heat exchanger. In a state in which dozens to hundreds of heat transfer tubes are arranged in a hexahedral shape to form a heat transfer block, and the heat transfer block is inserted into the inner space of the heat exchange tank, the outer space of the heat transfer block (internal space of the heat exchange tank) The inflow and discharge passages of the first fluid through the heat transfer tube and the inflow and discharge passages of the second fluid through each heat transfer tube are provided on the outer surface of the heat exchange tank.

When the shell-and-tube heat exchanger as described above is used for a long time, various foreign substances contained in the fluid adhere to the inner and outer surfaces of the heat transfer tube to form scale. The heat exchange between the first fluid and the second fluid is not performed properly, so the operation efficiency of the heat exchanger is significantly reduced, and the internal pressure rises due to the flow resistance of the fluid due to the scale, and corrosion or damage of the heat transfer tube is caused. This results in significantly shortening the service life of the machine.

Therefore, when the shell-and-tube type heat exchanger is used, the descaling operation on the surface of the heat transfer tube must be performed periodically. Although it can be performed without separation of the heat exchanger by injecting and passing it through at high pressure, the descaling of the outer surface of the heat transfer tube is difficult and cumbersome to separate and reassemble the heat transfer block from the heat exchange tank while the heat exchanger is stopped. In most cases, work was involved.

Of course, chemicals such as cleaning liquid can be used for removing scale attached to the outer surface of the heat transfer tube of the shell-and-tube type heat exchanger, but unlike the heat transfer tube with a small tube diameter (diameter), In this case, not only the high-pressure injection-type cleaning operation of the cleaning liquid itself was very difficult, but also the removal efficiency of the outer surface of the heat transfer tube by the cleaning liquid was very low. There was a problem that operation was impossible.

Due to the above factors, the existing shell-and-tube type heat exchanger has hardly been used for heat exchange between liquid and liquid or gas and gas, which includes heat exchange between gas and waste heat recovery work, etc., where a large amount of scale is generated, and the outside of the heat transfer tube As it is mainly used only for heat exchange between gas and liquid, which flows the gas component with a relatively small amount of scale on the surface through the heat exchange tank to the outside of each heat transfer tube, while passing the liquid component through each heat tube, There was a problem in that the application range of the shell-and-tube type heat exchanger, which has a simple structure and has relatively excellent heat exchange efficiency, is unnecessarily reduced.

In order to compensate for the above problems, a pair of scrapers penetrating the heat transfer block in the height direction are disposed between each heat transfer tube based on the width direction of the heat transfer block, and a link is provided on the upper and lower sides of each scraper. The shaft is installed through, and the cleaning device installed connected to the triangular plate-shaped drive plate and the driven plate, in which the upper link shaft and the lower link shaft move angularly by the power of the drive motor, are installed inside the heat exchange tank together with the heat transfer block. It is known in Japanese Patent Application Laid-Open No. 2002-062090 (published date: February 28, 2002) that, by installing, it is possible to remove scale from the outer surface of the heat transfer tube even during operation of the heat exchanger.

However, according to the prior art as described above, the drive shaft is installed to pass through the top vertex of the drive plate, and even in the case of the link shaft, it is installed to pass through the long holes provided on the upper and lower sides of the scraper. Therefore, the connection method of the drive plate to the drive shaft and the connection method of the link shaft and the scraper to the drive plate and the driven plate itself becomes a difficult structure to disassemble and assemble. and maintenance work, as well as the work of separating and replacing the scraper as a consumable independently from the link shaft was also very difficult.

In particular, in the prior art, a structure for discharging the scale removed from the heat transfer tube to the outside of the heat exchange tank without leakage of fluid was not provided, and Japanese Patent Laid-Open No. 2000-018886 (published date: January 18, 2000) was not provided. In 1), a hopper was installed on the exhaust gas outlet at the lower side of the heat exchange tank, and a screw conveyor and a rotary valve were installed at the lower end of the hopper to discharge scale to the outside of the heat exchange tank. In addition to causing unnecessary power wastage, there was a very high risk that the first fluid (high-temperature noxious gas) introduced along the screw conveyor when the rotary valve was opened was discharged in large quantities along with the scale.

In addition, when each of the heat transfer tubes has a circular pipe shape, it is difficult to remove the scale accumulated between the heat transfer tubes in the height direction of the heat transfer block, and it is also difficult to remove the scraper disposed between the heat transfer tubes. Since the heat exchange performance between fluids may be reduced by this, in the conventional case, there was a problem that the corresponding heat exchanger could not be operated more economically and efficiently because an appropriate alternative was not presented. Even if it is intended to provide a heat exchanger having a large-capacity processing performance facing each other, there is a problem in that an unreasonable and uneconomical method of individually installing a drive motor for each cleaning device provided in each heat exchange tank must be applied.

Japanese Patent Laid-Open No. 2002-062090 Japanese Patent Laid-Open No. 2000-018886

The present invention has been devised to solve the problems of the prior art, and after inserting all of the cleaning device including the drive plate, the driven plate, the link shaft and the scraper into the heat exchange tank, the drive shaft of the drive plate and the driven Only the driven shaft of the plate is connected and installed from the outside of the heat exchange tank by a chain power mechanism, and the drive plate is divided into a lower hanger plate and an upper mounting cover on which the scraper is hung so that the drive shaft is engaged therebetween so that it can be assembled and installed, and “⊂” and “∩”-shaped hook parts into which the link shaft is inserted are formed on the upper and lower sides of the scraper, respectively, and the separation prevention pins of the link shaft are assembled and installed on the inlet side of each hook part, and the heat transfer tube is square A pipe is used to closely install the heat transfer block in the height direction, and at the same time, the funnel-type storage chamber at the bottom of the heat exchange tank is connected to the collection tank by a discharge pipe equipped with an on/off valve, and a drain equipped with a drain valve at the lower end of the collection tank By installing the pipe, the efficient and stable operation of the scale cleaning device is ensured, and the installation, repair and maintenance of the cleaning device based on the heat transfer block is also performed, as well as the work of separating and replacing the scraper as a consumable independently from the link shaft. It can be performed very easily and simply, and it fundamentally blocks the stagnation and accumulation of scale between the heat transfer tubes based on the height direction of the heat transfer block. Its main technical task is to provide a heat exchanger capable of removing scale from the heat transfer tube during operation so that the scale removed from the heat transfer tube can be safely discharged to the outside of the heat exchange tank without leakage of the first fluid.

In addition, an inlet duct and an outlet duct of the first fluid are installed on the left and right sides of the upper surface of the heat exchange tank, and a vertical diaphragm is installed in the inner center of the heat exchange tank to determine the flow path of the first fluid "∪" On the other hand, the flow of the second fluid through the heat transfer block by dividing the circulation chambers corresponding to alternately in the up and down directions inside the inlet chamber and the outlet chamber of the second fluid installed on the left and right sides of the heat exchange tank. By making the path also form a “R”-shaped zigzag path, the heat exchange performance between fluids is deteriorated due to the interference of the scraper disposed between each heat transfer tube, and the fluid by making each heat transfer tube as a square pipe in close contact in the height direction. It is possible to sufficiently compensate for the reduction in the heat exchange area between the first fluid and the second fluid by increasing the contact time between the fluids by adjusting the flow path of the first fluid and the second fluid, and heat exchange having a large-capacity processing performance by facing two or more heat exchange tanks laterally. Even in the case of providing the device, only one driving motor provided with a main sprocket is installed in the center of the upper surface of the heat exchange tank connection structure, and the driving motor and the driving motor are installed on the driving shafts for two cleaning devices located in the center of the heat exchange tank connection structure. Install electric sprockets connected to a chain, and additionally install interlocking sprockets on the drive shaft and driven shaft of the other cleaning device to match the position facing the chain power mechanism, and connect the interlocking sprockets of the drive shaft and the driven shaft to the outside. By connecting the interlocking sprocket of the other drive shaft and the driven shaft with the interlocking chain, it is possible to operate all the cleaning devices installed in each heat exchange tank with only one drive motor. Another technical task is to provide a heat exchanger capable of removing the scale of the heat transfer tube during operation.

The present invention as a means for solving the above technical problem, a hexahedral heat transfer block in which dozens to hundreds of heat transfer tubes are arranged at regular intervals in the width direction and the height direction is inserted and installed in the heat exchange tank, , an inlet duct and an outlet duct of the first fluid are respectively connected to the outside of the heat exchange tank, and the inlet chamber and outlet of the second fluid communicated with each heat transfer tube constituting the heat transfer block on the left and right side portions of the heat exchange tank While the chambers are respectively installed, an inlet pipe and an outlet pipe of the second fluid are respectively connected and installed on the inlet chamber and the outlet chamber, and the inside of the heat exchange tank is cleaning to remove scale from the outer surface of each heat transfer tube constituting the heat transfer block The cleaning device includes a configuration in which a device is installed, wherein a pair of scrapers penetrating the heat transfer block in the height direction is disposed between each heat transfer tube based on the width direction of the heat transfer block, and the top side of each scraper The link shaft is installed through the and the lower side, and the upper link shaft and the lower link shaft are connected to the driving plate and the driven plate in the form of a triangular plate for angular motion by the power of the driving motor. In the heat exchanger capable of tube scale removal, the drive motor is disposed on the outer upper portion of the heat exchange tank with a reducer, and a drive shaft extending from the reducer is installed to pass through the upper side of the heat exchange tank in the front and rear directions On the other hand, a drive sprocket is installed at the end of the drive shaft extending from the reduction gear to the outside through the heat exchange tank, and a driven shaft is connected to the front lower side and the rear lower side of the heat exchange tank, respectively, and one of the two driven shafts A driven sprocket connected to the drive sprocket of the drive shaft and a rolling chain is installed at the end of the driven shaft, the drive plate is at least two or more, and the drive shaft and the drive shaft are detachably assembled and installed inside the heat exchange tank, and the driven plate heat exchange One at each driven shaft end protruding into the heat exchange tank through the front and rear wall portions of the tank is connected and installed, and the drive shaft and the The driven shaft is installed to pass through the upper vertex portions of the driving plate and the driven plate, and the link shaft is installed to pass through the left and right lower vertices of the driving plate and the driven plate, respectively, and each driving plate is a scraper link It consists of a hanger plate part hanging together with the shaft, and a mounting cover part assembled and installed on the upper side of the hanger plate and engaged with the drive shaft together with the hanger plate, wherein each scraper is for removing scale from the outer surface of the heat transfer tube. It is made to include a rod part provided with a scrubber, and a connecting rod for a link shaft provided on an upper side and a lower side of the rod part, and a link shaft on the upper end side of the upper side connecting rod and the lower end side of the lower side connecting rod. A link end for connection is provided, and the link end of the upper connecting rod and the link end of the lower connecting rod are respectively formed of a “⊂”-shaped and “∩”-shaped hook portion into which a link shaft is inserted, while each of the A detachment prevention pin for preventing the separation of the link shaft is detachably installed on the open inlet side of the hook part, and the heat transfer tube is manufactured in the shape of a square pipe along the height direction of the heat transfer block. It is closely installed, and each heat transfer tube is spaced apart at a predetermined interval for the arrangement of the scraper along the width direction of the heat transfer block, and a funnel-type storage chamber is installed in the lower portion of the heat exchange tank, A discharge pipe having a discharge valve is connected and installed, a collection tank is connected to the lower end of the discharge pipe, and a drain pipe having a drain valve is connected to the lower end of the collection tank.

As an even more preferred embodiment, the inlet duct and the outlet duct are installed on the left and right sides of the upper surface of the heat exchange tank, respectively, and the flow path of the first fluid through the inlet duct and the outlet duct is located at the inner center of the heat exchange tank. "A diaphragm in a vertical direction is installed to form a ruler, each heat transfer tube constituting the heat transfer block is installed to pass through the vertical diaphragm in a horizontal direction, and the cleaning device includes the internal left of the heat exchange tank with the diaphragm interposed therebetween; It is characterized in that one is installed on the right side, and the inner space of the inlet chamber is partitioned into a space of 2/3 of the upper side and a space of 1/3 of the lower side by a partition plate, and is formed at the lower inside of the inlet chamber. The partitioned 1/3 space is connected to the inlet pipe of the second fluid, and 2/3 of the space partitioned on the inner upper side of the inlet chamber provides a revolving chamber of the second fluid, and the interior of the discharge chamber The space is partitioned into a space of 1/3 of the upper side and a space of 2/3 of the lower side by a partition plate, and 1/3 of the space partitioned on the upper side of the inner side of the discharge chamber is connected to the discharge pipe of the second fluid. On the other hand, it is characterized in that 2/3 of the space partitioned inside the lower side of the discharge chamber provides a swirling chamber of the second fluid, and the heat exchanger is connected by facing at least two heat exchange tanks in left and right directions. installed, and the inlet chamber and the outlet chamber of the second fluid are respectively installed at the left end and right end of the heat exchange tank connection structure, while each heat transfer tube constituting the heat transfer block is disposed between the inlet chamber and the outlet chamber. It is installed to pass through the heat exchange tank in the horizontal direction, the drive motor is disposed on the central side of the heat exchange tank connection structure with a reducer, and a pair of sprockets are installed as main sprockets at the end of the output shaft of the reducer, The drive shaft of the cleaning device is installed to pass through the upper side of the heat exchange tank in the front and rear directions, and a main sprocket is installed at one end of the drive shaft of the left and right cleaning devices disposed adjacent to the drive motor under the drive motor. A pair of sprockets and a drive chain connected to each other A copper sprocket is installed, and an interlocking sprocket is installed at one end of the drive shaft of the cleaning device other than the cleaning device adjacent to the drive motor, and the drive sprocket is at the other end of the drive shaft corresponding to the opposite side of the electric sprocket or the interlocking sprocket. The driven sprocket connected to the driving sprocket and the electric chain is installed on the driven shaft at a position corresponding to the driving sprocket, and the interlocking sprocket is also connected to the end side of another driven shaft opposite the driven sprocket. and the interlocking sprocket of the driven shaft located under each of the electric sprockets is connected to the interlocking sprocket of the other driven shaft adjacent to the outside in an interlocking chain, and the interlocking sprocket of the driving shaft located above the other driven shaft is outside In a method in which an interlocking sprocket of another drive shaft adjacent in the direction is connected with an interlocking chain, and an interlocking sprocket of a driven shaft located below the other drive shaft is connected to an interlocking sprocket of another driven shaft adjacent to the outside in an interlocking chain. By this, the power primarily transmitted from the driving motor to the central cleaning device through the main sprocket, the drive chain and the electric sprocket is sequentially transmitted to the outer cleaning device, and the scrubber provided to each scraper is the outside of the rod part. A protrusion protruding sharply from the surface in a triangular shape, or a cleaning brush or a cleaning blade connected to the outer surface of the rod part is used, or the protrusion part, the cleaning brush, and the cleaning blade are alternately arranged along the height direction of the rod part. characterized in that it is installed.

According to the present invention as described above, the installation and separation of the drive plate to the drive shaft can be performed very easily and easily through disassembly and assembly between the upper mounting cover and the lower hanger plate, and at the same time, separation of each hook portion provided in the scraper With the prevention pin removed, the scraper moves angularly around the lower hook part hanging on the link shaft to first separate the upper hook part from the link shaft, and then pulls the scraper upward to finally pull the lower hook part from the link shaft. It provides the effect that the installation and separation of the scraper on the link shaft can be performed very easily and easily through the process of pulling out and the opposite process.

Through this, it is possible to greatly improve the convenience of not only the installation, repair, and maintenance of the cleaning device based on the heat transfer block, but also the operation of separating and replacing the scraper as a consumable independently from the link shaft, as well as the drive plate. With the cleaning device including the driven plate, link shaft and scraper inserted into the heat exchange tank, the drive sprocket installed on the drive shaft of the drive plate and the driven sprocket installed on the driven shaft of the driven plate and each sprocket are connected. By arranging only the rolling chain on the outside of the heat exchange tank, it provides an effect that the scale cleaning device can be operated more quietly and stably.

In addition, by using each heat transfer tube as a square pipe and installing it closely in the height direction of the heat transfer block, it fundamentally blocks the phenomenon of unnecessary stagnation and accumulation of scale between the heat transfer tubes, and at the same time, scales the surface of the heat transfer tube by a scraper. It provides an effect that can greatly improve the removal efficiency of the heat transfer tube and first discharges the stored scale from the heat transfer tube to the storage chamber to the collection tank by an appropriate amount through the discharge pipe, and the discharge valve of the discharge pipe is completely closed in the collection tank It provides the effect of safely discharging scale to the outside of the heat exchange tank without leakage of the first fluid by opening the drain valve of the drain pipe for use.

In addition, the flow path of the first fluid through the heat exchange tank is formed in a “∪” shape, while the flow path of the second fluid through the heat transfer block also forms a “R”-shaped zigzag path, so that each The flow path of the first fluid and the second fluid reduces the heat exchange performance between fluids due to the interference of scrapers disposed between the heat transfer tubes and reduces the heat exchange area between the fluids due to the height direction of each heat transfer tube as a square pipe. It provides an effect that can be sufficiently compensated by increasing the contact time between fluids through adjustment, and through this, provides the effect of maintaining both the cleaning function of the scale and the heat exchange performance of the heat exchanger at a high level.

As an additional matter, even when two or more heat exchange tanks are laterally opposed to each other to provide a heat exchanger having a large-capacity processing performance, the main sprocket, the drive chain, and the electric sprocket are passed from the drive motor installed in the center of the upper surface of the heat exchange tank connection structure. The power primarily transmitted to the central cleaning device is sequentially transmitted to the outer cleaning device through the interlocking sprocket installed on the drive shaft and the driven shaft of the other cleaning device, the linked chain, and the chain power mechanism on the opposite side. It is effective to provide a heat exchanger capable of removing scale from the heat transfer tube during operation in a more rational, economical and efficient manner than in the conventional case, such as being able to operate all of the cleaning devices installed in the two heat exchange tanks.

1 is a partially enlarged side view of a heating tube cleaning device used in the present invention.
Figure 2 is a front cross-sectional view of the main part of Figure 1;
Figure 3 is an operation state diagram of Figure 2;
Figure 4 is an exploded assembly view of Figure 2;
5 (A) and (B) are enlarged side and plan views of the main part of the heat transfer tube scraper used in the present invention.
6 (A) and (B) are enlarged side and plan views of main parts showing another application example of the heat transfer tube scraper used in the present invention.
7 (A) and (B) are enlarged side and plan views of main parts showing another application example of the heat transfer tube scraper used in the present invention.
8 is a partially cut-away rear view of a heat exchanger capable of removing scale during operation according to the present invention;
Fig. 9 is a partially cut-away side cross-sectional view of Fig. 8;
10 and 11 are enlarged views of the main part of FIG.
12 is a side cross-sectional view showing another embodiment of a heat exchanger according to the present invention.
Fig. 13 is a front view of Fig. 12;

Hereinafter, the present invention for achieving the above object will be described in detail with reference to the accompanying FIGS. 1 to 13 as follows.

First, the heat transfer tube 18 surface scale cleaning device 10 used in the present invention is a drive shaft installed to rotate by a predetermined angle with the power of the drive motor 1 as shown in FIGS. 1 to 3 . (3) and at least two or more (four in total based on FIG. 1) driving plates 6 that are assembled and installed to be hung at regular intervals along the driving shaft 3, and the lower side of each of the driving plates 6 A link shaft 7 installed so as to pass through the horizontal direction, and several to dozens (a total of 16 based on FIG. ), including a scraper (8).

The drive motor 1 is not installed for continuous one-way shaft rotation of the drive shaft 3, but is installed for reciprocating angular motion of the drive shaft 3, so it is more suitable for input of variable voltage and/or variable frequency than a general motor. It is preferable to use an inverter motor capable of controlling the rotation operation by the It is preferable to install the reduction gear 2 on the output shaft of the drive motor 1 so that It is desirable to connect as much as possible.

The drive motor 1 is installed outside the heat exchange tank 14 of the heat exchanger 20 as shown in FIG. 9, and the drive shaft 3, the drive plate 6, and the link shaft 7 are connected to the heat exchange tank ( 14) is arranged in parallel with the heat transfer block 20a on the upper side of the heat transfer block 20a corresponding to the inner space of 14), and the drive shaft 3 is connected from the reducer 2 to one side wall of the heat exchange tank 14 (Fig. 9, it is preferable to apply a sealing cap 3c for maintaining airtightness to the portion where the drive shaft 3 penetrates the wall of the heat exchange tank 14, and the drive shaft It is preferable to apply the bearing units (5) to both ends of (3) so as to more stably support the rotation.

As shown in FIGS. 1, 9 and 10, the scraper 8 constituting the cleaning device 10 removes the heat transfer block 20a from the link shaft 7 connecting each drive plate 6 in the horizontal direction. It is installed extending vertically downward through The scraper 8 has a rod portion 8a extending downward along the arrangement interval between the link shaft 7 and the heat transfer tube 18, and a certain arrangement interval along both surfaces of the rod portion 8a. It is made to include a scale removal scrubber (Scrubber) (8b) that protrudes toward the heat transfer tube (18).

Accordingly, when the driving motor 1 is operated to reciprocate each driving plate 6 together with the driving shaft 3 by a predetermined angle, the link shaft 7 connecting each driving plate 6 is The scraper 8 suspended on the top moves reciprocally while forming a "∪"-shaped path as a whole along the arrow direction of FIGS. 3 and 8, and in this process, from the surface of the rod part 8a of each scraper 8, the heat transfer tube ( 18) It is possible to perform a scale removal operation on the outer surface of the heat transfer tube 18 by the scrubber 8b protruding to the side, and this scale removal operation is a heat exchanger in which a fluid flows into the internal space of the heat exchange tank 14 . (20) can also be carried out during operation.

Scale removal of the outer surface of the heat transfer tube 18 over the entire installation width of the heat transfer block 20a using each scraper 8 disposed between the heat transfer tubes 18 constituting the heat transfer block 20a as described above In order to be able to work, it is preferable to install the corresponding cleaning device 10 in an appropriate position in consideration of the reciprocating movement width of each scraper 8, and if necessary, the lower part of each of the driving plates 6 It is also possible to install two or more link shafts 7 at regular intervals over the , and then install several to tens of scrapers 8 at regular intervals for each link shaft 7 .

When the above method is applied, since each scraper 8 has an arrangement structure of two or more rows across the width direction of the heat transfer block 20a, the scraper according to the reciprocating angular motion of the drive shaft 3 ( 8) can secure a wider cleaning range, and through this, a small or medium-sized shell-and-tube type heat exchanger (10) can use only one cleaning device (10) to cover the entire installation width of the heat transfer block (20a). 18) It is possible to remove the scale from the outer surface, and to form a flow path of the fluid flowing into the inner space of the heat exchange tank 14 and then discharged through the heat transfer block 20a in a zigzag path as shown in FIG. Likewise, when the diaphragm 14c is installed in the inner space of the heat exchange tank 14, it is preferable to separately arrange the cleaning device 10 for each space partitioned by the diaphragm 14c.

As shown in FIGS. 1 to 3 and FIGS. 8 and 9 , respectively, in order to perform the operation of the cleaning device 10 as described above more accurately and stably, it corresponds to the lower side of the heat transfer block 20a. In the inner space of the heat exchange tank 14, another link shaft 7 to which the lower end of each scraper 8 is linked is arranged in a horizontal direction, and a driven plate ( 11) is connected and installed, the driven shaft 4 is connected and installed on each driven plate 11, and each driven shaft 4 or one driven shaft 4 selected from the two is transmitted It is designed to be connected to the drive shaft 3 by a mechanism, and as the transmission mechanism, the driving sprocket 3b, the driven sprocket 4a, and the rolling chain 4b are most preferable.

In the same manner as described above, the link-type reciprocating motion of each scraper 8 according to the operation of the drive motor 1 is performed by the drive shaft 3 and the drive plate 6 and the link shaft 7 applied thereto as well as the driven shaft ( 4) and the driven plate 11 and the link shaft 7 applied to it can be performed more accurately and stably, and through this, the scale removal work of the outer surface of the heat transfer tube 18 by each scraper 8 can be performed more reliably, and each of the scrapers 8 can be manufactured and used more easily with a variety of materials ranging from metal materials to plastics and hard rubbers.

In other words, when each scraper 8 is installed hanging from only the link shaft 7 of the drive plate 6, the link shaft 7 of the drive plate 6 moves each scraper 8 in the upward direction. At the time of pulling or pushing in the downward direction, due to the frictional force between the heat transfer tube 18 and the scrubber 8b, some of the scrapers 8 move around the link shaft 7 of the drive plate 6 in the opposite direction to the movement direction. As it is tilted in the direction, there may be a blind spot where the scale removal operation by the scraper 8 is not performed properly, and in order to prevent this, the scraper 8 itself is made of a heavy metal material and That is, it is required to maintain a correct posture while overcoming the frictional force by its own weight.

On the other hand, the upper end and lower end of the scraper 8 are respectively connected to the link shaft 7 of the driving plate 6 and the driven plate 11, while the power of the driving shaft 3 connected to the driving plate 6 is If it is transmitted to the driven shaft 4 connected to the driven plate 11 via the chain transmission mechanism, the link shaft 7 of the drive plate 6 and the link shaft 7 of the driven plate 11 are 8) is pushed out at the same time as pulling or pulled at the same time as pushing, so the reciprocating operation of the scraper 8 can be performed more accurately and stably, and accordingly, not only heavy and hard materials such as metal materials, but also plastics or hard materials Since a light, soft, and easy-to-process material such as rubber can be applied with the scraper 8, the manufacturing period and manufacturing cost of the cleaning device 10 are greatly shortened and reduced, and the heat exchanger to which the cleaning device 10 is applied It can also contribute to the overall weight reduction of (20).

2 and 8, each of the driving plate 6 and the driven plate 11 is manufactured in the form of a triangular plate, and the driving shaft 3 and the driven shaft 4 are On the other hand, the link shaft 7 is installed to penetrate the vertex portions of the lower ends of both sides of the plates 6 and 11, respectively, and the scraper 8 is installed to have an arrangement structure of two rows connecting a pair of link shafts 7 provided to the driving plate 6 and the driven plate 11, respectively, in the up and down directions.

When the above structure is applied, the reciprocating movement width of the scraper 8 required for the scale removal operation can be relatively large while minimizing the operating space required for the reciprocating angular motion of the driving plate 6 and the driven plate 11. Therefore, the cleaning range and cleaning performance of the heat transfer tube 18 by the scraper 8 can be sufficiently secured under the condition of preventing an unnecessary increase in the size (volume) of the heat exchange tank 14, and as described above, it is necessary Of course, it is also possible to install the link shaft 7 in the number of three or more (three or more scrapers rows) over the lower end portion of the driving plate 6 and the driven plate 11 depending on the case.

However, when three or more link shafts 7 are installed on the driving plate 6 and the driven plate 11, the configuration of the cleaning device 10 according to the present invention is somewhat complicated, and each The closing rate (total area of the scraper 8/total area of the heat transfer block 20a in FIG. 8) at which the fluid passage provided between the heat transfer tubes 18 is blocked by the scraper 8, and thus the flow resistance of the fluid This can be increased unnecessarily, and the scraper 8 of the link shaft 7 disposed in the lower central portion of the driving plate 6 and the driven plate 11 has superior cleaning function compared to the cost aspect according to its installation. Since it is somewhat insufficient to expect improvement, it can be seen that it is preferable to install the link shaft 7 in a number of three or more only when a large amount of scale occurs.

In the heat transfer tube 18 scale cleaning device 10 having the above configuration, as a substantial element of the present invention, the installation, repair and maintenance of the cleaning device 10 based on the heat transfer block 20a The installation structure of the drive plate 6 on the drive shaft 3 and the link shaft so as to greatly improve the convenience of the work of separating and replacing the scraper 8 as a consumable item from the link shaft 7 alone as well as maintenance work The connection structure of the scraper (8) to (7) is improved.

More specifically, as shown in FIG. 2, each of the driving plates 6 includes a portion of a hanger plate 6a on which the scraper 8 is suspended by a corresponding link shaft 7, and a portion of the hanger plate 6a. It consists of a mounting cover 6b that is connected to the upper side by an assembly bolt 6d and meshes with the drive shaft 3 together with the hanger plate 6a, and the reinforcing ribs 6c are integrated on the hanger plate 6a. A semi-circular groove for insertion of the drive shaft 3 is provided on the assembly surface of the hanger plate 6a and the mounting cover 6b, and, if necessary, a buffer pad on the inner surface of each semi-circular groove. can also be attached.

In addition, a link end 9 for link-type connection with the link shaft 7 is provided on the upper side and the lower side of each of the scrapers 8, wherein the upper link end 9 is connected to the corresponding link shaft 7 ) is formed as a "⊂"-shaped hook portion 9a into which the lower side link end 9 is inserted, while the link shaft 7 is formed with a "∩"-shaped hook portion 9a into which the corresponding link shaft 7 is inserted. There is a separation prevention pin (9b) for preventing the separation of the link shaft (7) is installed on the opened inlet side of each hook part (9a), and the separation prevention pin (9b) has both ends of which are not shown. It is to be assembled and installed detachably with the inlet side of the hook portion (9a) by means of an assembly bolt or the like.

Therefore, as shown in Fig. 4, through the disassembly and assembly between the upper mounting cover (6b) and the lower side hanger plate (6a), the installation and separation of the driving plate 6 to the driving shaft 3 is very easy and easy. At the same time, the scraper ( 8) to first separate the upper hook portion 9a from the corresponding link shaft 7 by angular movement, and then pull the scraper 8 upwards so that the lower hook portion 9a is finally separated from the link shaft 7 The installation and separation of the scraper 8 for the link shaft 7 can also be performed very easily and easily through the process of getting out of the shaft and the opposite process.

As described above, each link end 9 becomes a head portion hooked in the form of a hook along the link shaft 7 at the corresponding position, and the rod portion 8a of the scraper 8 connected to the link end 9 is It becomes a connecting rod 8c in which the scrubber 8b is not formed, and the scrubber 8b protrudes sharply in a triangular shape from both surfaces of the rod part 8a as shown in FIGS. 5 to 7 . A typical application example is one selected from the cleaning brush 12 or the cleaning blade 13 connected to both surfaces of the protruding part or the rod part 8a, which is attached to the outer surface of the heat transfer tube 18. Of course, various types of scrubbers 8b may be applied as long as scale can be removed.

If necessary, the protrusion, the cleaning brush 12, and the cleaning blades 13 may be alternately installed along the height direction of the rod portion 8a, and the cleaning brush 12 may be installed on the rod portion 8a. It is preferable to install (including welding or bonding) integrally with the rod part 8a using the mounting frame 12a of the "C"-shaped cross section corresponding to the side shape, and in the case of the washing blade 13, the rod It is preferable to install to be inclined by a predetermined angle in the outward direction from the attachment end 13a integrally connected with both ends of the portion 8a (including welding or bonding), and the rod portion 8a is made of plastic or hard plastic. The protrusion, which becomes the scrubber 8b in a state of being made of rubber, the cleaning brush 12, and the cleaning blade 13 may be manufactured and connected with a metal material.

In addition, the spacing of the scrubbers 8b provided for each scraper 8 can be arbitrarily adjusted according to the amount of scale attached to the outer surface of the heat transfer tube 18 and the arrangement state of the heat transfer tube 18 However, in order to provide sufficient clearance (passage distance between the heat transfer tube 18 and the rod portion 8a) necessary for the flow of fluid even between each scrubber 8b, a spacing of at least 10 cm to a maximum of 50 cm It is preferable to install the scrubber 8b thereinto, and when the cleaning brush 12 is used as the scrubber 8b, the entire rod part 8a is surrounded by the left and right ends of the rod part 8a. It is also possible to dispose the cleaning brush 12 over its length (height).

8 and 9 are representative examples of the heat exchanger 20 according to the present invention to which the heat transfer tube 18 and the scale cleaning device 10 is applied. The inlet duct 14a and the outlet duct 14b of one fluid (heat transfer fluid) are connected and installed, and in the inner center of the heat exchange tank 14, the first fluid introduced through the inlet duct 14a is "∪" A diaphragm 14c is installed in a vertical direction to pass the heat transfer block 20a in a zigzag manner while forming a ruler-shaped flow path, and each heat transfer tube 18 constituting the heat transfer block 20a is vertically It is provided so that the diaphragm 14c may be penetrated in a horizontal direction.

In addition, on the outer surface of the heat exchange tank 14 corresponding to the left and right sides of the heat transfer block 20a, an inlet chamber ( 15) and a discharge chamber 16 are installed, respectively, and an inlet pipe 15a and an outlet pipe 16a of the second fluid are connected and installed on the inlet chamber 15 and the outlet chamber 16, respectively, and the A total of two cleaning devices 10 are installed, one each in the left and right inner spaces of the heat exchange tank 14 partitioned by the diaphragm 14c, and the driving motor 1 for operating the cleaning device 10 is It is installed on the support bracket 20b fixed to the outer surface of the heat exchange tank 14 so as to be placed together with the speed reducer 2 .

And, the drive shaft 3 extending from the reduction gear 2 through the shaft joint member 3a is installed to pass through the upper side of the heat exchange tank 14 in the front and rear directions, and the drive shaft 3 is heat exchanged. A sealing cap 3c for maintaining airtightness is installed in a portion penetrating the wall of the tank 14, and it penetrates the wall at one side (left side in FIG. 9) of the heat exchange tank 14 to the outside by a predetermined length. A drive sprocket 3b is connected to the free end of the extended drive shaft 3, and each driven shaft 4 can keep the wall portion airtight at the front and rear lower sides of the heat exchange tank 14. It is installed through

A driven sprocket 4a is connected to the end of the driven shaft 4 disposed below the driving sprocket 3b among the two driven shafts 4, and the driven sprocket 4a is connected to the rolling chain 4b. is connected to the drive sprocket 3b by means of which a bearing unit 5 for supporting shaft rotation is installed at the end side of the drive shaft 3 and the driven shaft 4, and each of the bearing units 5 is installed on the support bracket 20b of the drive motor 1 and the holder 5a of the outer surface of the heat exchange tank 14, and the speed reducer 2 is provided with a support bracket 20b together with its own support 2a. ) is installed on the

Also in the heat exchanger 20 according to the present invention, when each heat transfer tube 18 constituting the heat transfer block 20a is installed as a normal circular pipe, at the upper end and lower side of each heat transfer tube 18 . It becomes somewhat difficult to remove the attached scale with the scraper 8 of the cleaning device 10, because the scraper 8 disposed between each heat transfer tube 18 is removed from the side surface of the heat transfer tube 18. As the scale removal method of moving in diagonal paths in the up, down and left and right directions is applied, the scale attached and accumulated between the heat transfer tubes 18 over the height direction of the heat transfer block 20a is easily removed. because it won't

As shown in FIGS. 10 and 11 in order to completely solve the above disadvantages, the heat transfer tube 18 is manufactured in the form of a square pipe, and then, each heat transfer tube 18 is moved in the up and down directions. A panel-shaped heat transfer unit having a predetermined width and height is first configured by contacting or attaching them to each other, and the heat transfer unit is arranged in a hexahedral shape at regular intervals to finally configure the heat transfer block 20a, while the The scraper 8 of the cleaning device 10 was arranged between each heat transfer unit.

Through the method as described above, it is possible to derive an optimal combination in which the entire amount of scale attached to the outer surface of the heat transfer tube 18 can be completely removed by the scraper 8, and Figs. As shown at 10, the scrubber 8b for removing scale from the outer surface of the heat transfer tube 18 is formed to protrude toward the heat transfer tube 18 from both left and right sides of the rod 8a, as shown in FIG. What is done is that the left and right surfaces of the rod portion 8a are spaced apart from the outer surface of the heat transfer tube 18 at a predetermined distance, and scrubbers 8b are applied to the front and rear surfaces of the rod portion 8a. was formed to protrude.

In the case of the scraper 8 shown in FIGS. 1 to 10, it is preferable to apply when the spacing between the heat transfer tubes 18 is rather wide, and in the case of the scraper 8 shown in FIG. 11, the heat transfer tube ( 18) It is preferable to apply when the arrangement interval between It is a method that advances while breaking down the scale accumulated across the heat transfer tube 18 with can

Therefore, the arrangement interval of each heat transfer tube 18 and the convenience of installing the scraper 8 through the corresponding interval and the closure rate of the fluid passage by the scraper 8 are simultaneously considered among the methods shown in FIG. 10 or 11. It is preferable to select a cleaning device 10 of a more suitable method and install it inside the heat exchange tank 14. When a cleaning brush 12 made of a soft material is used as the scrubber 8b, the Since the scrubber 8b can be applied irrespective of the front, rear and left and right surfaces, the cleaning device 10 can be installed without distinction of the methods shown in FIGS. 10 and 11 .

On the other hand, when the heat transfer block 20a is formed by closely adhering the heat transfer tube 18 in the form of a square pipe in the height direction, the contact surface where each heat transfer tube 18 faces up and down is utilized for heat exchange between fluids. This results in a relatively reduced heat exchange area, and as mentioned in the previous description, each scraper 8 constituting the cleaning device 10 also becomes a factor causing interference in heat exchange between fluids. It is necessary not to deteriorate the heat exchange performance of the heat exchanger 20 according to the present invention despite the factors.

To this end, as shown in FIG. 8, the inlet chamber 15 covering one side (right side in the drawing) of the heat transfer block 20a is separated by a partition plate 17a to form a space of 2/3 of the upper side and 1/3 of the lower side of the heat transfer block 20a. In the state partitioned into the space of 3, the upper 2/3 of the space is installed as the turning chamber 17, and the discharge chamber 16 covering the other side (left side in the drawing) of the heat transfer block 20a. In this case, the space of the lower side 2/3 was installed as the turning chamber 17 in a state in which the space was divided into a space of 1/3 of the upper side and a space of 2/3 of the lower side by the partition plate 17a, An inlet pipe 15a and an outlet pipe 16a of the second fluid are connected to each other on the side of the inlet chamber 15 and the outlet chamber 16 except for each of the revolving chambers 17 .

As described above, the flow path of the first fluid through the heat exchange tank 14 is created as a “∪”-shaped path by the diaphragm 14c, while the flow path of the second fluid through the heat transfer block 20a is also left, Heat exchange performance between fluids due to the interference of scrapers 8 disposed between each heat transfer tube 18 by forming a “R”-shaped zigzag path (refer to the arrow in FIG. 8 ) by the right circulation chamber 17 . The decrease in the heat exchange area between the fluids due to the reduction and close contact in the height direction with each heat transfer tube 18 as a square pipe is sufficiently compensated by increasing the contact time between the fluids by adjusting the flow paths of the first and second fluids. it can be done

As an additional matter, as shown in FIGS. 8 and 9 , a funnel-shaped storage chamber 19 for collecting scale is installed at the open lower end of the heat exchange tank 14 , and a discharge valve is provided at the lower end of the storage chamber 19 . A discharge pipe 21 provided with 21a is connected and installed, a collection tank 22 is connected and installed at the lower end of the discharge pipe 21, and a drain valve 23a is installed at the lower end of the collection tank 22. The provided drain pipe 23 is connected and installed, and on one side of the storage chamber 19 and the collection tank 22, see-through windows 19a and 22a are installed so that the accumulated amount of scale can be checked from the outside. .

Accordingly, as the scale removal operation of the outer surface of the heat transfer tube 18 is periodically performed for a certain period using the scraper 8 of the cleaning device 10, it falls to the lower part of the heat exchange tank 14 or When the sedimented scale component accumulates in the storage chamber 19 by a certain amount or more, the discharge valve 21a of the discharge pipe 21 is opened to collect a part of the scale component (lower side) from the collection tank ( 22), and then, in a state in which the discharge valve 21a of the discharge pipe 21 is completely closed, the drain valve 23a of the drain pipe 23 connected to the lower end of the collection tank 22 is opened. , it is possible to safely discharge the scale component to the outside of the heat exchange tank 14 without unnecessary leakage of the first fluid.

12 and 13 provide a heat exchanger 20 having a large-capacity processing performance by laterally facing at least two heat exchange tanks 14 (four based on FIG. 13), but one drive As another embodiment of the present invention is shown in which all the cleaning devices 10 installed in each heat exchange tank 14 can be operated with only the motor 1, each heat transfer tube 18 constituting the heat transfer block 20a ) will be installed to pass through the entire connection structure (including the diaphragm) of the heat exchange tank 14 in the horizontal direction, and the storage chamber 19 and the collection tank 22 are disposed one by one for each heat exchange tank 14. (14) It is installed so as to be supported by the frame-type device base (27) together with the connecting structure.

In the drawing, one inlet duct 14a and one outlet duct 14b of the first fluid are installed on the left and right sides of the upper surface of the heat exchange tank 14 connection structure, and in this case, each heat exchange tank 14 ) will be provided with a fluid passage not shown so that the flow path of the first fluid can be formed in a zigzag flow in the up and down directions together with the diaphragm 14c on the wall portion facing in the lateral direction, and if necessary It is also possible to separately install the inlet duct 14a and the outlet duct 14b of the first fluid for each heat exchange tank 14, and the inlet chamber 15 and the outlet chamber 16 of the second fluid are cleaned In order to avoid interference with the chain structure for the operation of the device 10, it is preferable to install one at the left end and the right end of the heat exchange tank 14 connection structure, respectively.

In the heat exchanger 20 according to another embodiment of the present invention, the driving motor 1 is disposed on the central side of the upper surface of the connection structure of the heat exchange tank 14 in a state in which the reduction gear 2 is provided, and the A pair of sprockets arranged in the front and rear directions are installed at the end of the output shaft of the reduction gear 2 as the main sprocket 24 , and the drive shaft 3 of the cleaning device 10 is located above the heat exchange tank 14 . One side of the drive shaft 3 of the central left and right cleaning device 10 installed to pass through the side in the front and rear directions, and disposed in a position adjacent to the drive motor 1 under the drive motor 1 (Fig. A pair of sprockets constituting the main sprocket 24 and an electric sprocket 25 respectively connected to each other by a drive chain 24a are installed at the upper front side) end.

In addition, an interlocking sprocket 26 is installed at one end of the drive shaft 3 of the outer cleaning device 10 except for a pair of central cleaning devices 10 adjacent to the drive motor 1 , The driving sprocket 3b is installed at the other (rear side in the drawing) end of the driving shaft 3 that is opposite to the electric sprocket 25 or the interlocking sprocket 26, and the driving sprocket 3b and the rolling chain The driven sprocket 4a connected to (4b) is installed on the driven shaft 4 at a position corresponding to the driving sprocket 3b, and another driven shaft corresponding to the opposite side of the driven sprocket 4a ( An interlocking sprocket 26 is also connected to the end side of 4).

In addition, the interlocking sprocket 26 of the driven shaft 4 located under each of the electric sprockets 25 is connected to the interlocking sprocket 26 of the other driven shaft 4 adjacent to the outside by an interlocking chain 26a. installed, and the interlocking sprocket 26 of the drive shaft 3 positioned above the other driven shaft 4 is connected to the interlocking sprocket 26 of the other driven shaft 3 adjacent to the outside by an interlocking chain 26a installed, and the interlocking sprocket 26 of the driven shaft 4 located below the other drive shaft 3 is adjacent to the interlocking sprocket 26 of the other driven shaft 4 in the outward direction and the interlocking chain 26a) A chain interlocking structure is applied.

Therefore, the power primarily transmitted from the driving motor 1 to the driving shaft 3 of the central left and right cleaning device 10 through the main sprocket 24, the driving chain 24a, and the electric sprocket 25 is the driving sprocket It is transmitted to the driven shaft 4 of the cleaning device 10 through (3b), the rolling chain 4b and the driven sprocket 4a, and this power is transmitted to the outside through the interlocking sprocket 26 and the interlocking chain 26a. is transmitted to the driven shaft 4 of the other cleaning device 10 adjacent in the direction 3), and this power is transmitted to the drive shaft 3 of another cleaning device 10 adjacent to the outside through the interlocking sprocket 26 and the interlocking chain 26a in the up, down and left and right directions All the cleaning devices 10 installed in each heat exchange tank 14 are operated by one driving motor 1 by the zigzag chain linkage of the.

According to the present invention consisting of the above configuration, the installation and separation of the drive plate 6 to the drive shaft 3 through the disassembly and assembly between the upper side mounting cover (6b) and the lower side hanger plate (6a) is very easy and While it can be easily performed, the scraper centering on the lower end hook portion 9a hung on the link shaft 7 in a state in which the separation prevention pin 9b of each hook portion 9a provided in the scraper 8 is removed. (8) is angularly moved to first separate the upper hook portion 9a from the link shaft 7, and then pull the scraper 8 upward to remove the lower hook portion 9a from the link shaft 7 The installation and separation of the scraper 8 for the link shaft 7 can also be performed very easily and easily through the process of finally coming out and the opposite process.

Through this, not only the installation, repair, and maintenance work of the cleaning device 10 based on the heat transfer block 20a, but also the convenience of separating and replacing the scraper 8 as a consumable item with the link shaft 7 alone In addition to being able to significantly improve In the inserted state, the drive sprocket 3b installed on the drive shaft 3 of the drive plate 6, the driven sprocket 4a installed on the driven shaft 4 of the driven plate 11, and a rolling chain connecting each sprocket By disposing only (4b) on the outside of the heat exchange tank 14, the scale cleaning device 10 can be operated more quietly and stably.

In addition, by using each heat transfer tube 18 as a square pipe and installing it in close contact with the heat transfer block 20a in the height direction, it fundamentally blocks the phenomenon of unnecessary stagnation and accumulation of scale between the heat transfer tubes 18. At the same time, the removal efficiency of the surface scale of the heat transfer tube 18 by the scraper 8 can be greatly improved, and the scale dropped and stored from the heat transfer tube 18 to the storage chamber 19 is discharged through the discharge pipe 21 by an appropriate amount. The primary discharge is to the collection tank 20, and the drain valve 23a of the drain pipe 23 for the collection tank 22 is opened in a state in which the discharge valve 21a of the discharge pipe 21 is completely closed. , it is possible to safely discharge the scale to the outside of the heat exchange tank 14 without leakage of the first fluid.

In addition, the flow path of the first fluid through the heat exchange tank 14 is formed in a “∪” shape, while the flow path of the second fluid through the heat transfer block 20a is also a “R”-shaped zigzag path. As a result, the heat exchange performance between fluids deteriorated due to the interference of the scraper 8 disposed between each heat transfer tube 18, and the heat transfer tube 18 is used as a square pipe and is in close contact with the fluid in the height direction. The reduction in the heat exchange area can be sufficiently compensated by increasing the contact time between the fluids by adjusting the flow paths of the first and second fluids, and through this, both the cleaning function of the scale and the heat exchange performance of the heat exchanger 20 are at a high level. can be maintained as

As an additional matter, even when two or more heat exchange tanks 14 are laterally opposed to provide a heat exchanger 20 having a large-capacity processing performance, a drive motor installed in the center of the upper surface of the heat exchange tank 14 connection structure ( The power first transmitted from 1) to the central cleaning device 10 through the main sprocket 24, the drive chain 24a, and the electric sprocket 25 is the driving shaft 3 and the driven shaft ( 4) through the interlocking sprocket 26 and the interlocking chain 26a and the chain power mechanism on the opposite side to the outer side cleaning device 10, so that a plurality of heat exchange tanks (with only one driving motor 1) ( 14) It is possible to provide a heat exchanger capable of removing the scale of the heat transfer tube during operation in a more rational, economical and efficient manner than in the conventional case, such as being able to operate all of the cleaning devices 10 installed in 14).

1: drive motor 2: reducer 2a: pedestal
3: drive shaft 3a: shaft joint member 3b: drive sprocket
3c : sealing cap 4 : driven shaft 4a : driven sprocket
4b: rolling chain 5: bearing unit 5a: cradle
6: drive plate 6a: hanger plate 6b: mounting cover
6c: reinforcement meat 6d: assembly bolt 7: link shaft
8: scraper 8a: rod part 8b: scrubber
8c: connecting rod 9: link end 9a: hook portion
9b: separation prevention pin 10: cleaning device 11: driven plate
12: washing brush 12a: mounting frame 13: washing blade
13a: attachment end 14: heat exchange tank 14a: inlet duct
14b: exhaust duct 14c: diaphragm 15: inlet chamber
15a: inlet pipe 16: discharge chamber 16a: discharge pipe
17: swivel chamber 17a: partition plate 18: heat transfer tube
19: storage chamber 19a, 22a: sight window 20: heat exchanger
20a: heat transfer block 20b: support bracket 21: exhaust pipe
21a: discharge valve 22: collection tank 23: drain pipe
23a: drain valve 24: main sprocket 24a: drive chain
25: electric sprocket 26: interlocking sprocket 26a: interlocking chain
27: device base d: clearance gap

Claims (5)

A hexahedral heat transfer block in which several tens to hundreds of heat transfer tubes are arranged at regular intervals in the width and height directions is inserted and installed in the heat exchange tank, and the inlet duct of the first fluid and the outside of the heat exchange tank Discharge ducts are connected to each other, and an inlet chamber and a discharge chamber of a second fluid communicating with each heat transfer tube constituting a heat transfer block are respectively installed on the left and right side portions of the heat exchange tank, while on the inlet chamber and the discharge chamber and an inlet pipe and an outlet pipe of the second fluid are respectively connected to each other, and a cleaning device for removing scale from the outer surface of each heat transfer tube constituting the heat transfer block is installed inside the heat exchange tank, the cleaning device comprising: A pair of scrapers penetrating the heat transfer block in the height direction are disposed between each heat transfer tube based on the width direction of the heat transfer block, and an upper link shaft and a lower link shaft are respectively at the upper and lower sides of the scraper. A heat exchanger capable of removing scale during operation including a configuration in which the upper link shaft and the lower link shaft are respectively connected to a triangular plate-shaped driving plate and a driven plate disposed inside the heat exchange tank in,
A drive motor having a reducer is installed on the outer upper portion of the heat exchange tank, and a drive shaft extending from the reducer is installed to pass through the upper side of the heat exchange tank in the front and rear directions, while passing through the heat exchange tank from the reducer to the outside A driving sprocket is installed at the end of the driving shaft extending from A driven sprocket connected to
At least two or more driving plates are installed to be detachably assembled with the drive shaft inside the heat exchange tank, and the driven plate penetrates the front and rear wall portions of the heat exchange tank and protrudes into the inside of the heat exchange tank. One coaxial end is connected and installed, and the driving shaft and the driven shaft are installed to pass through the upper vertex of the driving plate and the driven plate, and the upper link shaft and the lower link shaft are left and right lower ends of the driving plate and the driven plate. It is installed so as to penetrate each of the side vertices,
Each of the drive plates comprises a hanger plate portion on which the scraper is suspended together with the upper link shaft, and a mounting cover portion assembled and installed on the upper side of the hanger plate and engaged with the drive shaft together with the hanger plate, The scraper includes a rod part provided with a scrubber for removing scale from the outer surface of the heat transfer tube, an upper connecting rod with an upper link shaft provided on the upper side of the rod part, and a lower link shaft provided on the lower side of the rod part. It is made including a connecting rod on the lower side of the
Link ends for connecting the upper link shaft and the lower link shaft are provided on the upper end side of the upper side connecting rod and the lower end of the lower side connecting rod, respectively, the link end of the upper connecting rod and the lower side connecting rod The link ends of the '⊂' and "∩"-shaped hooks are respectively inserted into the upper link shaft and the lower link shaft, respectively, while the upper link shaft and the lower end side of each hook part are opened on the inlet side. A detachment prevention pin that prevents the detachment of the link shaft is detachably assembled and installed.
In a state in which the heat transfer tube is manufactured in the shape of a square pipe, each heat transfer tube is installed in close contact with each other along the height direction of the heat transfer block. spaced apart from each other, a funnel-type storage chamber is installed in the lower portion of the heat exchange tank, a discharge pipe having a discharge valve is connected to the lower end of the storage chamber, and a collection tank is connected to the lower end of the discharge pipe, and the A heat exchanger capable of removing scale during operation, characterized in that a drain pipe equipped with a drain valve is connected to the lower end of the collection tank. According to claim 1, wherein the inlet duct and the discharge duct are respectively installed on the left and right sides of the upper surface of the heat exchange tank, the flow path of the first fluid through the inlet duct and the discharge duct in the inner center of the heat exchange tank "∪" A diaphragm in a vertical direction is installed to form a ruler, each heat transfer tube constituting the heat transfer block is installed to pass through the vertical diaphragm in a horizontal direction, and the cleaning device is disposed on the left and right sides of the heat exchange tank with the diaphragm interposed therebetween. A heat exchanger capable of removing scale from the heat transfer tube during operation, characterized in that one is installed in each. According to claim 1 or 2, wherein the inner space of the inlet chamber is formed by dividing the upper 2/3 space and the lower 1/3 space by a partition plate, the inner space of the lower side of the inlet chamber is divided 1/3 of the space is connected to the inlet pipe of the second fluid, and 2/3 of the space partitioned on the upper side of the inside of the inlet chamber provides a revolving chamber of the second fluid,
The inner space of the discharge chamber is partitioned into a space of 1/3 of the upper side and a space of 2/3 of the lower side by a partition plate, and 1/3 of the space partitioned in the upper side of the discharge chamber is the space of the second fluid. A heat exchanger capable of removing scale during operation, characterized in that while being connected to the discharge pipe and installed, 2/3 of the space partitioned inside the lower side of the discharge chamber provides a swirling chamber for the second fluid. The heat exchanger according to claim 1 or 2, wherein at least two heat exchange tanks are connected to each other in left and right directions, and the inlet chamber and the outlet chamber of the second fluid are connected to the left end of the heat exchange tank connection structure. On the other hand, each of the heat transfer tubes constituting the heat transfer block is installed to pass through each heat exchange tank in the horizontal direction between the inlet chamber and the discharge chamber,
The drive motor is disposed on the central side of the heat exchange tank connection structure with the reduction gear, and a pair of sprockets are installed as main sprockets at the end of the output shaft of the reduction gear, and the drive shaft of the cleaning device is the upper part of the heat exchange tank. A pair of sprockets which are installed to penetrate the sides in the front and rear directions, and which form a main sprocket at one end of the drive shaft of the left and right cleaning devices disposed at a position adjacent to the drive motor under the drive motor, and a drive chain, respectively. Electric sprockets are installed,
An interlocking sprocket is installed at one end of the drive shaft of the cleaning device other than the cleaning device adjacent to the drive motor, and the drive sprocket is installed at the other end of the drive shaft corresponding to the opposite side of the electric sprocket or the interlocking sprocket, the drive sprocket and the driven sprocket connected by the electric chain is installed on the driven shaft at a position corresponding to the driving sprocket, and the interlocking sprocket is also connected and installed on the end side of another driven shaft corresponding to the opposite side of the driven sprocket,
The interlocking sprocket of the driven shaft located below each of the electric sprockets is installed in connection with the interlocking sprocket of the other driven shaft adjacent to the outside in an interlocking chain, and the interlocking sprocket of the driving shaft located above the other driven shaft is installed in an outward direction. The interlocking sprocket of another adjacent drive shaft is connected and installed by an interlocking chain, and the interlocking sprocket of the driven shaft located below the other drive shaft is connected to the interlocking sprocket of another driven shaft adjacent to the outside in an interlocking chain. A heat exchanger capable of removing scale during operation, characterized in that the power initially transmitted from the drive motor to the cleaning device on the central side through the main sprocket, the drive chain and the electric sprocket is sequentially transmitted to the cleaning device on the outer side. [Claim 3] The method of claim 1 or 2, wherein the scrubber provided for each scraper is selected from a protrusion protruding sharply in a triangular shape from the outer surface of the rod portion, or a cleaning brush or cleaning blade connected to the outer surface of the rod portion. A heat exchanger capable of removing scale during operation, characterized in that either one is used, or the protrusion, the cleaning brush, and the cleaning blade are alternately installed along the height direction of the rod.

Images