KR102429267B1 - Heat exchanger for wastewater - Google Patents

Abstract

The present invention relates to a heat exchange device for wastewater, which maximizes the heat exchange efficiency between wastewater containing heat and natural water to be heated. The heat exchange device for wastewater comprises: water flow guide members having a rectangular edge bar formed on the edge thereof, and having a wastewater passage or a natural water passage inside the edge bar; and a heat transfer plate positioned on an upper portion or a lower portion of the water flow guide members, and having a wastewater through-hole or a natural water through-hole drilled to be connected to the wastewater passage or the natural water passage of the water flow guide members. The heat exchange device has an upper reinforcing plate and a lower reinforcing plate added thereto while the water flow guide members and the heat transfer plate are coupled and can be disassembled and assembled by a bolt and a nut. The water flow guide members are stacked repeatedly one layer at a time while having the wastewater through-hole or the natural water through-hole formed to be blocked from the wastewater passage or the natural water passage. The wastewater passage or the natural water passage has a structure in which a plurality of module blocks having a honeycomb structure of a hexagonal cylinder shape with an inner air gap formed in the water flow guide members are arranged to come in surface contact with each other while a flow path allowing wastewater or natural water to move therein is arranged therebetween, and has a structure in which a sealing plate is interposed between the water flow guide members and the heat transfer plate.

Description

Heat exchanger for wastewater

The present invention relates to a heat exchange device for wastewater, and more particularly, to a heat exchanger device for wastewater that maximizes heat exchange efficiency between wastewater containing heat and natural water to be heated.

A general heat exchange device refers to equipment that obtains hot water by using high-temperature wastewater used and discarded by industries, etc.

Looking at the conventional heat exchange device, it has a structure for using only the latent heat of wastewater that is simply used and discarded. The wastewater flows into the inside through the heat exchanger, and the introduced wastewater flows through a heat transfer pipe or heat transfer passage. , at this time, the natural water introduced from the outside flows in the opposite direction to the wastewater, and receives heat from the high-temperature wastewater flowing through the heat transfer pipe or heat transfer passage to be in a preheated state. The natural water preheated in this way consumes less power and combustion energy than when it is reheated by a boiler or the like, so that a significant energy saving effect is obtained.

However, the heat exchanger using wastewater should be manufactured in a structure where natural water flows as if the wastewater passageway is wrapped in a 'U' shape between the passageway through which the wastewater flows and the passageway through which the natural water flows, and the wastewater and natural water are repeated in layers. Because it is not, there is a problem that the heat transfer efficiency is lowered.

Therefore, in consideration of the above problems, a 'plate heat exchanger' has been proposed in Korean Patent Publication No. 10-1697026.

However, this is also a structure in which a 'HH'-shaped partition is placed between 'U'-shaped plates to form a passageway through which wastewater flows and a passageway for natural water flows, and the upper and lower portions are welded to form a passageway. Also, if the passage is blocked, it cannot be repaired, so it has the disadvantage of having to dispose of it.

In addition, the heat exchange device manufactured through welding as described above has a disadvantage in that the welding part is easily corroded by high-temperature wastewater and natural water, so that durability is weakened.

As such, there was clearly a structural limitation in manufacturing a heat exchange device in which heat exchange efficiency is improved, maintenance is easy, and durability is ensured.

Korean Patent Publication No. 10-1697026 (plate heat exchanger, 2017.01.16. Announcement) Korean Patent Publication No. 10-0857976 (Wastewater Heat Exchanger, 2008.09.10. Announcement) Korean Patent Publication No. 10-0717608 (Wastewater heat exchanger with spiral flow path, announced on May 15, 2007) Korean Patent Publication No. 10-0775905 (Wastewater Heat Exchanger, 2007.11.13. Announcement)

The present invention has been devised to solve the problems of the prior art, and an object of the present invention is to delay the flow of a fluid so that latent heat can be recovered as much as possible from wastewater containing heat to increase heat exchange efficiency, and It is to provide a heat exchange device for wastewater that can conveniently change the path of a fluid or perform internal repair in consideration of usage conditions by configuring the passage through which natural water flows so that it can be disassembled and assembled based on the module structure.

The configuration of the problem solving means of the present invention for achieving the above object is,

a water flow inducing member 120 having a rectangular rim bar 121 formed on the periphery and having a waste water passage 122A or a natural water passage 124A inside the rim bar 121; The wastewater through hole 132 or the natural water through hole 134 which is located on the upper or lower part of the water flow guide member 120 and is connected to the waste water passage 122A or the natural water passage 124A of the water flow guide member 120 . ) having a heat transfer plate 130 and; In a state in which the water flow inducing member 120 and the heat transfer plate 130 are combined, the upper reinforcing plate 140 and the lower reinforcing plate 150 are padded to enable disassembly and assembly with the bolt 160 and the nut 170 . In the configured heat exchange device 100,

The water flow guide member 120 is stacked while repeating one layer at a time while having the waste water through hole 122B or the natural water through hole 124B formed to block the waste water passage 122A or the natural water passage 124A,

The waste water passage 122A or the natural water passage 124A is a plurality of module blocks 180 having a hexagonal columnar honeycomb structure in which internal pores are formed inside the water flow guide member 120 to move wastewater or natural water. It consists of a structure in which each module block is arranged so as to be in surface contact with each other with a flow path in between.

A sealing plate 190 is interposed between the water flow inducing member 120 and the heat transfer plate 130 .

According to an embodiment of the present invention, the water flow guide member 120 includes a wastewater flow guide plate 122 having a wastewater passage inside the edge bar 121 and a natural water passage inside the edge bar 121 . It may be composed of a natural water flow guide plate 124, and the wastewater flow guide plate 122 and the natural water flow guide plate 124 may be stacked while being repeated layer by layer.

In addition, the upper and lower surfaces of the heat transfer plate 130 may be formed with a coating layer including any one thermally conductive material selected from graphene in the form of a graphene solution or powder.

According to another embodiment of the present invention, the module block 180 is selected from among alkyl benzene sulfone (ABS), polycarbonate (PC), and acrylic styrene acrylonitrile (ASA). It may be made of any one or more materials, and the module block 180 is fitted in an arbitrary area of irregularities formed at regular intervals over the entire area of the heat transfer plate 130 to enable disassembly and assembly on the surface of the heat transfer plate 130 . can be combined.

According to another embodiment of the present invention, the sealing plate 190 may include any one or more materials selected from carbon nanotubes, copper, graphene, graphite, nickel, and ceramic materials to improve thermal conductivity.

At this time, the ceramic material has electrical insulation and excellent thermal conductivity, such as boron nitride, aluminum nitride, magnesium oxide, aluminum oxide, silicon carbide. ), and may include any one or more materials selected from silicon nitride.

In addition, a plurality of bolt insertion holes are perforated in the edge bar 121 of the water flow guide member 120 , and the water flow guide member 120 has an outer edge of the heat transfer plate 130 positioned above or below the water flow guide member 120 . The same number of bolt insertion holes may be perforated at positions coincident with the bolt insertion holes of the flow guide member 120 .

According to another embodiment of the present invention, the internal pores of the module block 180 are filled with a thermal conductive material containing graphene in powder form, and the graphene solution is formed on the outer surface of the module block 180 . A contained thermally conductive coating layer may be formed.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

As such, according to the heat exchange device for wastewater of the present invention,

First, when the structure of the passage through which wastewater and natural water passes or any one point of the passage is damaged, only the damaged part needs to be replaced, not the entire device, so internal repair is easy;

Second, latent heat can be recovered as much as possible from wastewater containing heat by reducing the flow rate and delaying the residence time.

Third, by interposing a sealing plate containing a thermally conductive material between the water flow inducing member and the heat transfer plate, it is possible to maximize heat preservation and increase sealing force,

Fourth, by making it possible to separate and assemble, repair, cleaning, and replacement are facilitated, and the number of connections between the water flow inducing member and the heat transfer plate can be appropriately adjusted by the user according to the required amount of hot water.

Fifth, by stacking the wastewater flow guide plate and the natural water flow guide plate repeatedly one by one or by placing the natural water flow guide plate on the upper and lower parts of the wastewater flow guide plate, the heat of the wastewater flowing through the wastewater flow guide plate is transferred to the upper and lower parts. There is an advantage in that the absorption of latent heat in wastewater can be further improved by allowing the adjacent flowing natural water to absorb it.

1 is an exploded perspective view showing a heat exchanger for wastewater of the present invention;
Figure 2 is a combined perspective view of Figure 1;
3 is a cross-sectional view taken along line VV of FIG. 1;
Figure 4 is a perspective view for showing a sealing plate of the configuration of Figure 1,
5 is an enlarged perspective view for showing a module block in the configuration of FIG. 1;
6 is a state diagram of a heat exchange device for wastewater according to the present invention.

The present invention was devised to solve the problems that appear in the structural limitations of the conventional heat exchanger, and embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Prior to this, the present embodiment does not limit the scope of the present invention, but is presented only as an example, and various changes are possible within the scope without departing from the technical gist thereof. Wherever possible, identical or similar parts are denoted by the same reference numerals in the drawings. Also, as used herein, singular forms include plural forms unless the phrases clearly indicate the opposite. The meaning of "comprising," as used herein, specifies a particular characteristic, region, integer, step, operation, element and/or component, and other specific characteristic, region, integer, step, operation, element, component, and/or group. It does not exclude the existence or addition of

- under -

1 is an exploded perspective view showing a heat exchanger for wastewater of the present invention, FIG. 2 is a combined perspective view of FIG. 1, FIG. 3 is a cross-sectional view taken along the line V-V of FIG. 1, and FIG. 4 is a sealing plate 190 in the configuration of FIG. ), FIG. 5 is an enlarged perspective view for showing the module block 180 of the configuration of FIG. 1, and FIG. 6 is a state diagram of a heat exchanger for wastewater according to the present invention.

In the heat exchange device for wastewater according to the present invention, a water flow inducing member having a rectangular rim bar 121 formed on the outside, and a wastewater passage 122A or a natural water passage 124A inside the rim bar 121 . (120) and; A wastewater through hole 132 or a natural water through hole 134 disposed on the upper or lower portion of the water flow inducing member 120 and connected to the wastewater passage 122A or the natural water passage 124A of the water flow inducing member 120 . ) and a heat transfer plate 130 having; In a state in which the water flow inducing member 120 and the heat transfer plate 130 are combined, the upper reinforcing plate 140 and the lower reinforcing plate 150 are padded to enable disassembly and assembly with the bolt 160 and the nut 170 . In the configured heat exchange device 100, the water flow guide member 120 is provided with a waste water through hole 122B or a natural water through hole 124B formed to be blocked from the waste water passage 122A or the natural water passage 124A. A plurality of module blocks 180 having a hexagonal columnar honeycomb structure in which internal voids are formed inside the water flow inducing member 120 are stacked repeatedly layer by layer, and the waste water passage 122A or natural water passage 124A has a plurality of module blocks 180 It has a structure in which each module block is arranged so as to be in surface contact with each other with a flow path through which wastewater or natural water flows, and a sealing plate 190 is interposed between the water flow inducing member 120 and the heat transfer plate 130 . is made of

The water flow guide member 120 is provided with a waste water passage (122A) or a natural water passage (124A) on the inside of the edge bar (121).

In addition, the water flow inducing member 120 is provided with a waste water through hole 122B or a natural water through hole 124B formed to be blocked from the waste water passage 122A or the natural water passage 124, and is stacked while repeating one layer at a time.

As a modified example of the present invention, the water flow inducing member 120 has an edge bar 121 formed in a rectangular shape on the outside, and a waste water passage 122A or a natural water passage 124A formed in a concave-convex shape on the surface thereof. It can also be configured to be formed.

According to a preferred embodiment of the present invention, the water flow guide member 120 may be composed of a wastewater flow guide plate 122 and a natural water flow guide plate 124 . The wastewater flow guide plate 122 has a wastewater passage formed inside the edge bar 121 , and the natural water flow guide plate 124 has a natural water passage formed inside the edge bar 121 . At this time, it is preferable that the wastewater flow guide plate 122 and the natural water flow guide plate 124 have a stacked structure so that they are repeated layer by layer.

As described above, the wastewater flow guide plate 122 and the natural water flow guide plate 124 having a stacked structure have the heat transfer plate 130 interposed between the wastewater flow guide plate 122 and the natural water flow guide plate 124. By being repeatedly formed, wastewater and natural water are circulated in opposite directions, allowing the heat of wastewater to be transferred naturally to natural water. That is, since the wastewater passage and the natural water passage are repeatedly formed, absorption of latent heat in the wastewater can be maximized.

According to a modified embodiment of the present invention, the wastewater flow guide plate 122 and the natural water flow guide plate 124 are configured such that a wastewater through hole and a natural water through hole are formed on both sides thereof, but the wastewater through hole or natural water through hole is directed to one side from the center By forming it so that it is biased, it can be used upside down. According to the above structure, for example, one wastewater flow guide plate 122 or one natural water flow guide plate 124 can use both the wastewater flow guide function and the natural water flow guide function.

On the other hand, the wastewater flow guide plate 122 and the natural water flow guide plate 124 are preferably made of a synthetic resin material for thermal insulation, and more specifically, ABS resin (acrylonitrile-) having excellent thermal insulation effect, durability, and moldability. butadiene-styrene copolymer) is preferably used.

The heat transfer plate 130 serves as a kind of medium for transferring the heat obtained from the water flow inducing member 120 to the upper or lower portion, and is located in the upper or lower portion of the water flow inducing member 120, and guides the water flow. A wastewater through-hole 132 or a natural water through-hole 134 is perforated to connect to the wastewater passageway 122A or the natural water passageway 124A of the member 120 . In addition, the upper or lower surface of the heat transfer plate 130 may be formed with a coating layer including any one of the thermal conductive material of graphene in the form of a graphene solution or powder in order to increase the thermal conductivity.

At this time, it goes without saying that the positions of the waste water through hole 132 and the natural water through hole 134 of the heat transfer plate 130 should be formed by selecting a position that does not interfere with the flow of waste water and natural water.

When viewed in a plan view, the module block 180 has a hexagonal honeycomb structure with internal voids formed therebetween, and is arranged so that single module blocks are in surface contact with each other through a passage, which is a path through which waste water or natural water moves. Therefore, when wastewater or natural water flows along the flow path to wastewater or natural water introduced into the water flow inducing member 120 by the module block 180, the heat transfer time is delayed by inducing it to flow with resistance applied to heat. Much more heat can be recovered from the containing wastewater.

As a modified embodiment of the present invention, the module block 180 may have a structure in which each single module block can be disassembled and assembled on the surface of the heat transfer plate 130 (not shown). To this end, irregularities are formed on the surface of the water flow inducing member 120 at regular intervals over the entire area, and the module block 180 is provided with a concave portion corresponding to the irregularity so as to be fitted in an arbitrary area of the irregularity. can As described above, when the module block 180 is disassembled and assembled on the water flow inducing member 120 to be disassembled and assembled, when the path through which wastewater or natural water moves or some areas are damaged, not the entire device is damaged. Since only a part can be replaced, it has the advantage of facilitating internal repair.

According to the present invention, the module block 180 is one or more materials selected from alkyl benzene sulfone (ABS), polycarbonate (PC), and acrylic styrene acrylonitrile (ASA). can be made with In addition, the internal pores of the module block 180 may be filled with a heat conductive material containing graphene in powder form, and a heat conductive coating layer containing graphene solution may be formed on the outer surface of the module block 180 . .

Meanwhile, the sealing plate 190 is interposed between the water flow inducing member 120 and the heat transfer plate 130 . The sealing plate 190 promotes heat transfer between the water flow inducing member 120 and the heat transfer plate 130 as well as a close sealing function for blocking from the outside. Accordingly, the sealing plate 190 may include one or more materials selected from carbon nanotubes, copper, graphene, graphite, nickel, and ceramic materials to improve thermal conductivity.

At this time, among the materials listed above, the ceramic material has electrical insulation and excellent thermal conductivity, such as boron nitride, aluminum nitride, magnesium oxide, aluminum oxide, It may include any one or more materials selected from silicon carbide and silicon nitride.

According to a further embodiment of the present invention, a plurality of bolt insertion holes are perforated in the edge bar 121 of the water flow inducing member 120, and a heat transfer plate positioned above or below the water flow inducing member 120 ( 130), the same number of bolt insertion holes may be perforated at positions coincident with the bolt insertion holes of the water flow inducing member 120.

According to the above configuration, it is possible to disassemble and assemble to facilitate repair, cleaning, and replacement, and according to the required amount of hot water, the user can conveniently adjust the number of couplings between the water flow inducing member and the heat transfer plate. can be further improved.

It is preferable that the upper reinforcing plate 140 and the lower reinforcing plate 150 use a relatively thick iron plate in consideration of the pressure of water. In addition, it is self-evident that a wastewater vent and a natural water vent are formed for inflow and discharge of wastewater and natural water.

In addition, the upper reinforcing plate 140 and the lower reinforcing plate 150 are formed by the upper reinforcing plate 140 and the lower reinforcing plate 150 in a state in which the water flow inducing member 120 and the heat transfer plate 130 are coupled. It is configured so that it can be disassembled and assembled with a padded bolt 160 and a nut 170 .

For example, the waste water passage 122A or the natural water passage 124A according to the embodiment of the present invention may be formed in a 'D' or 'Z' shape in plan view. According to the wastewater passage 122A or the natural water passage 124A formed in the above shape, the wastewater or natural water introduced into the water flow inducing member 120 is guided to flow in a zigzag form, thereby delaying the heat transfer time, resulting in a much greater amount of wastewater from the wastewater. heat can be recovered.

As described above, in the heat exchange device for wastewater according to the present invention, when the configuration of a passage through which wastewater and natural water passes or any one point is damaged, only the damaged part can be replaced, not the entire device, so the internal repair It is easy to use, and latent heat can be recovered as much as possible from wastewater containing heat by reducing the flow rate and delaying the residence time. By making it possible to maximize preservation and separate assembly, repair, cleaning, and replacement are facilitated, and the user can conveniently adjust the number of connections between the water flow inducing member and the heat transfer plate according to the required amount of hot water. By stacking the wastewater flow guide plate and the natural water flow guide plate repeatedly one layer at a time, and placing the natural water flow guide plate on the upper and lower parts of the wastewater flow guide plate, the heat of the wastewater flowing through the wastewater flow guide plate is transferred to the adjacent top and bottom. It has the effect of further improving the absorption of latent heat in wastewater by allowing natural water to absorb it, and it is an invention of great industrial value.

100: heat exchange device of the present invention 120: water flow inducing member
121: border bar 122: wastewater flow guide plate
122A: wastewater passageway 122B: wastewater passageway
124: natural water flow guide plate 124A: natural water passage
124B: natural water through hole 130: heat transfer plate
132: waste water through hole 134: natural water through hole
140: upper reinforcement plate 150: lower reinforcement plate
160: bolt 170: nut
180: module block 190: sealing plate

Claims (8)

a water flow inducing member 120 having a rectangular rim bar 121 formed on the periphery and having a waste water passage 122A or a natural water passage 124A inside the rim bar 121; A wastewater through hole 132 or a natural water through hole 134 disposed on the upper or lower portion of the water flow inducing member 120 and connected to the wastewater passage 122A or the natural water passage 124A of the water flow inducing member 120 . ) and a heat transfer plate 130 having; In a state in which the water flow inducing member 120 and the heat transfer plate 130 are combined, the upper reinforcing plate 140 and the lower reinforcing plate 150 are padded to enable disassembly and assembly with the bolt 160 and the nut 170 . In the configured heat exchange device 100,
The water flow inducing member 120 is stacked while repeating one layer at a time while having a waste water through hole 122B or a natural water through hole 124B formed to block the waste water passage 122A or the natural water passage 124A,
The waste water passage 122A or the natural water passage 124A is a plurality of module blocks 180 having a hexagonal pillar-shaped honeycomb structure in which internal voids are formed inside the water flow inducing member 120 to move waste water or natural water. It consists of a structure arranged so that each module block is in surface contact with the flow path in between,
A sealing plate 190 is interposed between the water flow inducing member 120 and the heat transfer plate 130,
The module block 180 is made of any one or more materials selected from alkyl benzene sulfone (ABS), polycarbonate (PC), and acrylic styrene acrylonitrile (ASA),
The module block 180 is heat exchanger for wastewater, characterized in that it is fitted in an arbitrary area of irregularities formed at regular intervals over the entire area of the heat transfer plate 130 to enable disassembly and assembly on the surface of the heat transfer plate 130 . Device. The method of claim 1,
The water flow guide member 120 is a waste water flow guide plate 122 having a waste water passage inside the edge bar 121, and a natural water flow guide plate 124 having a natural water passage inside the edge bar 121. composed,
The wastewater heat exchanger, characterized in that the wastewater flow guide plate (122) and the natural water flow guide plate (124) have a structure in which they are stacked while being repeated layer by layer. The method of claim 1,
A heat exchanger for wastewater, characterized in that the upper and lower surfaces of the heat transfer plate 130 are formed with a coating layer containing any one thermally conductive material selected from graphene in a graphene solution or powder form. delete The method of claim 1,
The sealing plate 190 is a heat exchanger for wastewater, characterized in that it includes one or more materials selected from carbon nanotubes, copper, graphene, graphite, nickel, and ceramic materials to improve thermal conductivity. 6. The method of claim 5,
The ceramic material is a material having electrical insulation and excellent thermal conductivity, such as boron nitride, aluminum nitride, magnesium oxide, aluminum oxide, silicon carbide, A heat exchanger for wastewater, characterized in that it contains any one or more materials selected from silicon nitride. The method of claim 1,
A plurality of bolt insertion holes are perforated in the edge bar 121 of the water flow inducing member 120 , and the water flow induction is provided on the outside of the heat transfer plate 130 positioned above or below the water flow inducing member 120 . A heat exchanger for wastewater, characterized in that the same number of bolt insertion holes are drilled at positions coincident with the bolt insertion holes of the member (120). The method of claim 1,
The internal pores of the module block 180 are filled with a thermal conductive material containing graphene in powder form, and the outer surface of the module block 180 is coated with a thermal conductive layer containing graphene solution. A heat exchanger for wastewater.

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