KR101080998B1 - Waste water heat recovery system - Google Patents

Abstract

The present invention relates to a wastewater heat recovery system, comprising: a tank having a box-shaped structure of an assembly structure so as to open an interior to be cleaned or repaired if necessary; A plurality of heat exchange units coupled in a layered structure through the partition walls fixed to both sides of the tank, and connectors connecting upper and lower adjacent heat exchange units outside the partition wall so that the internal pipes of the heat exchange units in each layer are connected in an S-shape; A heat exchanger comprising a time water or refrigerant inlet connected to the lowermost heat exchange unit and a time water or refrigerant outlet connected to the uppermost heat exchange unit; Wastewater is introduced into a zigzag-type wastewater flow channel formed by a space formed by alternately spaced space between one side of the layered heat exchange unit constituting the heat exchanger and an inner wall of the tank and a space between the upper and lower heat exchange units, and a wastewater flow channel having a top floor. A wastewater flow path comprising a wastewater inlet formed at the top of the tank and a wastewater outlet formed at the bottom of the tank for discharging the wastewater collected in the lowermost wastewater flow path to the outside of the tank; Coupled between the upper and lower heat exchange unit, the brush is in contact with the surface of the heat exchange unit, the brush is a cleaner having a structure for cleaning the surface of the heat exchange unit while moving between the two partition walls by a reciprocating means; Characterized by a configuration that includes.

Wastewater Heat, Wastewater Heat Recovery, Heat Pump, Waste Heat, Industrial Wastewater, Cooling, Evaporator

Description

Wastewater Heat Recovery Machine {WASTE WATER HEAT RECOVERY SYSTEM}

The present invention relates to a wastewater heat recoverer configured to recover wastewater heat contained in a public bath or industrial wastewater and recycle it to a boiler system or a heat pump system.

The technology that recovers high temperature and low temperature wastewater from industrial activities and waste water from public baths and recycles them by using a temperature rising technology such as heat pump is widely used for cooling and heating and hot water supply. have.

Wastewater heat recovery system is for recovering heat contained in waste water of high temperature or low temperature and applying it to boiler or heat pump system. It constitutes a flow path through which wastewater flows into and discharges from a tank of a certain standard, and the heat exchanger is disposed on the flow path of waste water. By arranging the waste water and the coolant or the refrigerant in the heat exchanger to cross-flow, the heat of the wastewater is absorbed by the coolant or the coolant. It is a device that can be used for heating or hot water supply.

Existing wastewater heat recovery unit and the tank made of a box-shaped or cylindrical structure of the assembly structure to open the interior to be cleaned or repaired if necessary; A wastewater flow path including a wastewater inlet and a wastewater outlet formed at a lower portion of the tank, the wastewater flow passage being formed in a constant gradient between the wastewater inlet and the wastewater outlet to guide the flow of wastewater into the tank; A heat exchanger is formed in the upper and lower parts of the tank, and a heat exchanger is formed along the wastewater channel so as to contact the wastewater flowing through the wastewater channel. When the wastewater flows through the wastewater flow channel inside the tank by gravity, it is discharged to the outside of the tank through the wastewater outlet located at the bottom of the tank. It absorbs heat and gradually increases its temperature, and it is discharged through the time export outlet of the tank and constitutes a system that is stored in a heat storage tank.

Since the wastewater heat recoverer is a structure that recovers and uses heat contained in the wastewater by heat exchange between the wastewater and the heat exchanger in the tank, the heat recovery rate may increase or decrease according to the heat exchange contact area and the contact time within a predetermined tank volume range. In addition, since heat recovery efficiency increases and decreases according to the thermal conductivity between the contact mediums, a large difference occurs in the heat recovery efficiency depending on the contamination state of the thermal contact surface.

In the existing wastewater heat recovery system, the heat exchanger is composed of a brass tube or a stainless steel tube having high thermal conductivity and high corrosion resistance in the form of a coil, a box plate, or a heat exchanger tube arranged closely between distribution pipes connected to an outlet. The contact surface is increased, and the wastewater flow path has a structure that delays or disperses the flow so that the wastewater flow path can continuously maintain contact with the heat exchanger.

In the existing wastewater heat recovery system, the wastewater flow channel (waste water passage) is formed so that the wastewater flows in a zigzag form by stacking the fresh water (or water) induction pipes in the box shape in the vertical and horizontal directions. Korean Patent Nos. 10-0417638, 10-760856, 10-507766, etc., which maximize the thermal contact area where heat exchange occurs within a limited space and increase the heat exchange contact time by multiple stages to increase the recovery rate of wastewater heat. It offers a number of advantages.

However, the above-described structure is a rectangular box structure in which the fresh water induction pipe flowing through the water (fresh water) while forming the waste water flow path is used to secure the rigidity to prevent sagging due to the weight of the waste water flowing through the upper surface and the weight of the fresh water flowing inside. For this reason, a large amount of expensive stainless steel or brass pipes with large pipe thicknesses and large cross-sectional thicknesses must be used, resulting in high manufacturing costs. The waste water and fresh water induction pipes are contacted only on the upper surface, increasing the amount of contact surface where actual heat exchange occurs. There is a limit to this.

In addition, the above-described structure requires periodic cleaning to prevent a decrease in heat recovery efficiency caused by organic components or foreign matter contained in the wastewater, which forms a biofilm or a plug on the inner wall of the tank, thereby rapidly reducing the thermal conductivity. In general, cleaning is performed by opening the tank with the device stopped and cleaning the heat exchange surface by manpower, by spraying high pressure water onto the heat exchange surface, or by dissolving biofilm using chemicals. In case of the washing method using high pressure water, the pressure pump and the nozzle installed inside the tank should be installed together.

Therefore, the existing wastewater heat recovery machine has a problem that the operation rate of the device is low by frequently stopping the operation for cleaning the thermal contact surface, and in the case of using high-pressure water, a pressure pump and the like must be separately provided, so that the cost for facility and maintenance is high. Is increased. In addition, there is a limitation in increasing the thermal contact area necessary for increasing the heat recovery rate because the configuration of the nozzle, etc. are included in the limited space inside the tank, and above all, the heat recovery rate decreases as the use of the heat contact surface is not made clean. There is this.

The present invention maximizes the contact density of the wastewater and the heat exchanger in the limited wastewater heat recovery tank space to improve the heat recovery rate, and by simplifying the internal configuration by omitting the configuration of the high-pressure cleaning device, etc. to prevent the loss of heat by such a mechanism It is an object of the present invention to provide a wastewater heat recovery system that can reduce the cost and effort required for manufacturing and maintenance.

In addition, the present invention has a purpose of providing a waste water heat recoverer that can be continuously operated 365 days by a cleaner that cleans the heat exchange contact surface even during operation of the device according to the contact surface contamination state of the heat exchanger, the waste water heat recovery with high efficiency. .

Furthermore, an object of the present invention is to provide a wastewater heat recovery system in which a heat recovery device is always operated in an optimal state by determining a contamination state at a heat exchange contact surface and automatically operating a cleaner according to the contamination state.

Waste water heat recovery device according to the present invention to achieve the above object, the box-type tank is formed with an inspection opening so that the interior can be cleaned or repaired if necessary; A plurality of heat exchange units coupled in a layered structure through the partition walls fixed to both sides of the tank, and connectors connecting upper and lower heat exchange units adjacent to each other so that the internal pipes of the heat exchange units in each layer are connected in an S-shape; A heat exchanger comprising a city import and export port connected to the lowermost layer of the heat exchange unit and a city export and export port connected to the uppermost layer of the heat exchange unit; A zigzag-type wastewater flow channel formed by a space between the one side portion of the layered heat exchange unit constituting the heat exchanger and the tank inner wall alternately to form a space to form a space between the space and the vertical heat exchange unit, A wastewater flow path consisting of a wastewater inlet formed at the top of the tank for introducing wastewater to the uppermost layer, and a wastewater outlet formed at the bottom of the tank to discharge the wastewater collected at the bottom of the wastewater flow path to the outside of the tank; It features.

In addition, the present invention constitutes the heat exchanger, the city import and export port connected to the lowermost layer of the heat exchange unit, the city import and export in the configuration connected to the uppermost layer of the heat exchange unit, the city import and export is replaced with the refrigerant outlet at any time heat pump Characterized in a configuration that can be used for.

In addition, the present invention is the heat exchange unit is formed of a plurality of heat exchange tubes are formed in close contact with each other in the horizontal direction without a gap formed a plate-shaped heat exchange surface, the connector is a time or refrigerant introduced into the plurality of heat exchange tubes It is characterized by consisting of a structure that converges and distributes to a plurality of heat exchange tubes.

In addition, the present invention is coupled between the upper and lower heat exchange unit, the brush whose hair is in contact with the surface of the heat exchange unit, the brush includes a cleaner having a structure for cleaning the surface of the heat exchange unit while moving between the two partition walls by reciprocating means; Characterized in that the configuration.

In addition, the present invention is a reciprocating transfer means of the brush is continuously hooked to the S structure to the roller installed on the outer side of the partition wall so as to pass through the center of the upper and lower heat exchange unit of each layer, one of the rollers is connected to the drive motor capable of reverse rotation The frame of the brush is coupled to the wire passing through the center of the heat exchange unit, and the brush coupled between the layers to contact the surface of the heat exchange unit is coupled to the reciprocating stroke point of the wire of each layer, It is characterized in that the cleaning is performed while the brush is reciprocated between the two partitions by the forward rotation of the motor by installing a sensor for providing a forward and reverse rotation drive signal of the drive motor.

In addition, the cleaner is characterized in that the automatic operation can be performed by setting a timer at an optimum time interval according to the contamination state of the surface of the heat exchanger, and each temperature sensor is installed in the waste water inlet and outlet, The cleaner is characterized in that the cleaner is automatically driven when the temperature difference between the two measured values is below the set value.

According to the present invention, a plurality of heat exchange tubes are attached to form a heat exchange unit, and the waste water is directly contacted with the heat exchange unit, thereby maximizing the contact density of the waste water and the heat exchanger in the limited waste water heat recovery tank space, thereby increasing the heat recovery rate.

In addition, by connecting the small diameter heat exchanger tube to form a plate heat exchange unit, the thermal contact surface is increased, and by configuring the heat exchange unit with the wastewater flow channel, it is possible to omit the configuration for forming the wastewater flow channel, thereby making it economically feasible. Simple internal construction reduces manufacturing and maintenance costs.

In addition, the present invention can keep the thermal contact surface clean by the brush reciprocating according to the contact surface contamination state of the heat exchanger is high heat recovery efficiency, economical and excellent space utilization effect compared to the washing method by high pressure water, Secondary water pollution can be prevented by chemical use, and cleaning with the brush is possible even during operation of the device, which provides the advantage of continuous operation for 365 days.

In addition, the cleaner may be automatically driven at a predetermined time interval by a timer, and the cleaner is automatically operated according to the contamination state by determining the contamination state at the heat exchange contact surface, thereby maximizing efficiency and maintaining the best heat recovery condition at all times. Provide effect.

       Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows the internal structure of the front state for illustrating the configuration of the present invention, Figure 2 shows the internal structure of the side state, Figure 3a shows the internal structure of the planar state.

According to this, the wastewater heat recovery device according to the present invention, the tank 10 made of a box-shaped structure of the assembly structure so that the interior can be cleaned and repaired if necessary; A plurality of heat exchange units 22 coupled in a layered structure through the partitions 21 fixed to both sides of the tank and the upper and lower adjacent heat exchange units 22 are connected to each other in the heat exchange unit inner pipe of each layer to connect the upper and lower adjacent heat exchange units 22 to each other. A heat exchanger (20) comprising a connector (23) for continuous coupling in an S-shape, a city import and export port (24) connected to a lower layer of the heat exchange unit, and a city export and export port (25) connected to a top layer of the heat exchange unit; Zig-zag-type wastewater flow channel formed by a space 31A formed between the one side portion 22A of the heat exchange unit constituting the heat exchanger and the tank inner wall 11 and a space 31B between the upper and lower heat exchange units ( 31), a wastewater inlet 32 formed in the upper part of the tank for injecting wastewater into the uppermost layer of the wastewater flow channel, and wastewater formed in the lower portion of the tank to discharge the wastewater collected in the lowermost layer of the wastewater flow channel to the outside of the tank. It consists of a wastewater flow path 30 consisting of a discharge port (33).

The tank 10 is formed in a box shape, each wall including the upper and lower surfaces are fastened and assembled by bolts or welded by welding, and if necessary, after opening the inspection opening (repair and cleaning of the internal facility) 12).

In addition, the tank may include a suitable thermal insulation means, it may include a viewing window to determine the internal state of the tank.

The heat exchanger 20 is for recovering the heat of the waste water by absorbing the heat contained in the waste water and providing it to the time flow flowing therein to fix the heat exchange unit 22 connected to the S structure by the connector 22 in the tank. It consists of a partition 21 for the first, and the city import and export port 24, the city export and export port 25, the refrigerant inlet port 26 and the refrigerant outlet 27 installed to supply and recover the water to the heat exchange unit 22, The inlet port 24, the time export port 25, the coolant inlet port 26 and the coolant outlet port 27 are separately formed, and when used as a boiler, the coolant inlet port 26 and the coolant outlet port 27 are located at the lowermost and uppermost layers. When connected to the heat pump system, the refrigerant inlet 26 and the refrigerant outlet 27 is connected.

The heat exchange unit 22 may be configured in a single plate structure, may be configured in a structure for stabilizing the water flow by forming a plurality of diaphragm in the plate, and may be configured in a plate shape by connecting a thin pipe. In any case, the cross-sectional size of the heat exchange unit is designed so that the same flow rate can be considered in consideration of the flow rates of the city inlet and outlet or the refrigerant inlet and the refrigerant outlet.

The heat exchange unit may be carried out in a structure in which a thin pipe-type heat exchange tube 221 is tightly connected horizontally without a gap so that the heat exchange surface can be formed at a high density to form a plate-shaped thermal contact surface as a whole. The unit can be formed at high density within the limited tank space, and the heat exchange unit can form a wastewater flow channel to improve the thermal conductivity by direct contact, and reduce the manufacturing cost by joining pipes of small diameter. The heat transfer distance can be shortened, and the heat absorption rate can be improved by time.

Both ends of the heat exchange unit 22 pass through the partition wall 21 and are connected by the connector 23 at the outer side of the partition wall.

4 is a view illustrating a connection structure between an uppermost heat exchanger unit, a lower heat exchanger unit, a partition wall, and a connector, as an embodiment in which a heat exchanger tube constituting a heat exchanger unit is configured as a custom pipe.

As illustrated, each of the heat exchange tubes 221 is inserted into a hole 211 formed through the partition wall 21, and each heat exchange tube is connected to a connector 23 configured in the form of a distribution tube.

The connector 23 is coupled to communicate with each heat exchanger tube constituting the upper layer heat exchanger unit at the top, and is coupled to communicate with each heat exchanger tube constituting the lower layer heat exchanger unit at the lower side, so that one side of the convergence tube is the other side up and down. It functions as a distribution pipe to form a continuous pipeline from the city inlet or the refrigerant inlet to the city outlet or the refrigerant outlet via the heat exchange unit of each layer.

The lower layer heat exchange unit comprises an S-type heat exchanger in which a heat exchange unit having a layered layer is connected from the time inlet or the refrigerant inlet to the time inlet or the outlet of the refrigerant so that the connector is coupled to the lower layer heat exchanger unit.

The heat exchange tube 221, the partition wall 21, and the connector 23 may each form a continuous pipe line by welding, and may be implemented in a structure in which a packing is inserted and a watertight structure is fastened with a bolt or the like.

The time input to the heat exchanger inner conduit is connected to a boiler having a heat storage tank and the like, and when the heat exchanger is configured as an evaporator using a freon gas refrigerant, a time import and export port 24 and a time export outlet 25 are respectively connected to the lowermost and uppermost layers. ) By connecting the refrigerant inlet 26 and the refrigerant outlet 27 change the pipe can be used directly as a heat pump system.

The total cross section of the heat exchanger tube constituting the heat exchange unit is substantially the same as the cross section of the city import and export port so as to maintain the continuity of the pipeline from the city import and export port to the city export and export port, and is required for the connector of the lowest heat exchange unit connected to the city import and export port. When the flow rate control device (not shown) for adjusting the inflow flow may be installed.

In the present invention, the wastewater flow path 30 is formed by the heat exchange unit 22, the partition wall 21, and a tank inner wall 11 that are coupled to the heat exchange unit to be watertight or spaced apart. do.

That is, by explaining this with reference to Figure 2, the space between the right side portion 22A of the uppermost heat exchange unit and the tank inner wall 11 spaced 31A leading to the upper and lower portions is formed, the left side is a watertight structure in the tank inner wall It is in close contact. On the contrary, in the heat exchange unit immediately below the uppermost layer, the right side portion is in close contact with the tank inner wall in a watertight structure, and a space 31A is spaced apart from the left side portion and the tank inner wall 11 to extend up and down. As such a structure is repeated to the lowermost heat exchange unit, a zigzag-type wastewater flow channel 31 is formed by the space 31A between the heat exchange unit and the tank inner wall and the space 31B between the upper and lower heat exchange units. Wastewater introduced through the wastewater inlet 32 formed at one side thereof is discharged through the wastewater outlet 33 formed at the bottom of the tank by zigzag flowing each layer while contacting the heat exchange unit arranged in a layered structure.

A channel-shaped channel structure in which the lengthwise direction is directed to both partition walls and a drain hole 341 at a predetermined interval is formed at the bottom so that the wastewater introduced from the wastewater inlet 32 is evenly distributed into the wastewater flowing water of the uppermost heat exchange unit. Distributor 34 is installed.

As shown in FIG. 3B, the distributor 34 may be implemented in a channel-shaped channel structure so that one end thereof is open toward the wall.

As shown in FIG. 5, the cool water or the coolant flows into the inlet or the inlet of the coolant while the low temperature wastewater or the hot wastewater flows into the wastewater inlet and flows out through the wastewater outlet. Heat exchange with the wastewater occurs in reverse flow with the wastewater flow, and as the temperature rises, it contacts with the low temperature and the high temperature and discharges the temperature so that the temperature of the wastewater is almost reached to the input temperature of the wastewater. ) Is supplied to the boiler 60 or the heat pump system 70, and the discharged wastewater is discharged as it is or according to the wastewater state or supplied to the wastewater purification system 80.

Therefore, the wastewater flow channel and the heat exchanger each have an S-type structure, and cross each other at an angle of 90 ° so that the wastewater flows from the upper layer to the lower layer and the time water or the refrigerant flows from the lower layer to the upper layer to be in contact with each other.

The present invention proposes a cleaner to improve the usability of the wastewater heat recovery and to increase the heat recovery efficiency.

The cleaner 40 is coupled between the upper and lower heat exchange unit 22, the brush 41 whose hair 411 is in contact with the surface of the heat exchange unit, the brush is a heat exchange while moving between the two partition walls by a reciprocating means It has a structure for cleaning the surface of the unit.

The brush is composed of a hair 411 and the frame 412 for supporting the hair, the hair is in close contact with the upper and lower surfaces of the heat exchange unit is configured to wipe the surface of the heat exchange unit.

The brush has the same width as that of the heat exchange unit, and has a function of preventing heat from being formed on the upper and lower surfaces of the heat exchange unit by contacting the brush by sweeping back and forth to wipe off the biofilm or various foreign substances, thereby improving heat recovery efficiency.

The reciprocating transfer means of the brush can be configured in various ways.

For example, a groove is inserted into the brush body to form a groove for fixing the rod, and a hole for inserting the rod into the wall of the tank is formed, and if necessary, the rod is inserted into the hole and coupled to the brush to push or pull by the attraction force. It is possible to clean the heat exchange surface by reciprocating the brush installed in advance.

In another form, the cylinder body is coupled to the outside of the wall, and the piston rod is inserted into the tank and the brush body is coupled to the head, so that the reciprocating movement of the brush and the heat exchange surface are cleaned by the stroke of the cylinder. Can be configured to

FIG. 6 shows an exemplary embodiment of the reciprocating conveying means 42. The wire 421 is hung in an S structure on a roller 422 provided outside the partition wall 21 so as to pass through the center of the upper and lower heat exchange units 22 in each layer. One of the rollers is connected to the drive motor 423 capable of reverse rotation, and coupled to the frame 412 of the brush 41 to the wire passing through the center of the heat exchange unit, the brush coupled between each layer to contact the surface of the heat exchange unit The sensor is coupled to the reciprocating stroke of each layer wire, and the sensor 44 is provided at both ends of the stroke between the diaphragms to provide the forward and reverse rotation signal of the drive motor. Present a configuration that allows for cleaning.

The brush is coupled to the structure in which the brush is fastened to the wire on both sides of the brush body can be stable cleaning without twisting during the reciprocating transfer movement.

In addition, the wire is supported by the roller to reciprocate the section defined by the power of the drive motor is connected to the loop structure of the end point at the time point, so that the tension adjusting device 424 to adjust the change of tension in accordance with the external temperature Is added.

As shown in FIG. 4, the wire 421 must pass through both partitions 21 and the connector 23, so that the wire passing grooves 435 are formed in the partitions and the connectors.

When the loop is composed of only the wire, the rotational force applied from the drive shaft is not accurately transmitted by the sliding generated during the contact with the roller, and the brush may be damaged by changing the initial setting position of the brush. In order to prevent this, the present invention couples the chain sprocket 426 to the wire drive shaft 425 connected to the drive motor 423, and connects the chain 427 to the reciprocating stroke section made by the number of chains, It is preferable to install the pipe 428 so that the chain operates and guides so that the chain does not sag so that the flow of the chain occurs therein.

By the above configuration, the rotational driving force corresponding to the reciprocating distance is reliably transmitted to the wire through the chain, and the brush is reciprocated at the correct position without departing from the initial fixed position.

In addition, in order to prevent the reciprocating driving force from being reliably transmitted by sag as the length of the wire becomes longer, the roller shaft 429 positioned about the wire driving shaft 425 is chained to the chain 430 and the chain sprocket. 431, the chain sprocket 432 is installed on the shaft, and the chain 433 may be connected to the reciprocating stroke section made by the chain male plaque 432. .

By such a structure, the driving force is directly transmitted to the roller shaft located in the middle portion of the wire, thereby preventing the driving retardation caused by the length of the wire.

In order to prevent abrasion of the surface of the heat exchange unit during operation due to the sagging of the chain connected to the middle of the wire, it is preferable to configure the protection plate 434 on the heat exchange surface of the chain 433.

8 illustrates a state in which the foreign matter 100 adhered to the surface of the heat exchange unit 20 by the cleaner is removed by the brush 41.

9 is a gradient in which the brush standby position of the heat exchange unit 20 which is made of zigzag is widened so that the brush 41 constituting the cleaner is bent while being in the standby state and thus the elasticity is prevented from being weakened to perform the cleaning in the optimal state. Can be formed.

Considering the length of the bristles, the bristles have a weak contact between the surface of the bristle and the heat exchange unit in the atmospheric state without forming a gradient such that the wide and narrow sides have a length difference of about 10 mm. By maintaining the brush is not bent, the elasticity is maintained, the brush bristles contact with the surface of the heat exchange unit at an appropriate pressure during the reciprocating movement of the brush out of the atmosphere place to clean the surface to improve the durability of the brush.

The cleaner according to the present invention can be driven at a time interval set in a timer according to the type of wastewater or the state of contamination, and each temperature sensor (not shown) is installed at the wastewater inlet and outlet, and the temperature difference between the two measured values is By configuring the cleaner to operate when the value is lower than the set value, the cleaner can be automatically operated according to the contamination state.

For example, in the case of bathroom wastewater with a wastewater temperature of 25 ~ 30 ℃, when the input temperature of the hourly water is 0 ℃, the discharge temperature of the water is 23 ~ 28 ℃ lower by 1 ~ 2 ℃ than the wastewater input temperature by heat exchange. The discharge temperature is about 2 ~ 3 ℃. Therefore, when the difference between the wastewater inlet temperature and the outlet temperature is less than about 20 ° C, heat exchange is not normally performed due to contamination of the surface of the heat exchanger unit. By constructing the heat recovery efficiency of the wastewater heat recovery can be maintained continuously.

1 is an external configuration diagram of a wastewater heat recovery system according to the present invention

2 is a front view of the internal configuration of the waste water heat recovery system according to the present invention

Figure 3a is a side view of the internal configuration of the waste water heat recovery according to the present invention

Figure 3b is another embodiment of the dispenser according to the present invention

4 is a plan view of the internal configuration of the waste water heat recovery system according to the present invention

5 is a coupling relationship of the heat exchange unit, the connector, the diaphragm

Figure 6 is a flow diagram of wastewater and time water

7 is a coupling relationship between the brush and the wire and chain

8 is a view illustrating a cleaning state by a cleaner;

Figure 9 is another embodiment of the present invention applying a gradient to the heat exchange unit

* Explanation of Major Codes

10. Tank 11.Inner Wall

20. Heat exchanger 21. Bulkhead 22. Heat exchange unit

23. Connector 24. City import and export 25. City export and export

30. Wastewater flow path 31. Wastewater flow channel 32. Wastewater inlet

33. Waste water outlet 34. Dispenser

40.Cleaner 41.Brush 42.Round transfer means

421.Wire 422.Roller 423.Drive motor

424. Tension control device 425. Wire drive shaft

426.Chain sprockets 427.Chain 428.Pipes

Claims (13)

A box-type tank formed with an inspection opening so as to open the inside and to clean or repair, if necessary; A plurality of heat exchange units coupled in a layered structure through the partition walls fixed to both sides of the tank, and connectors connecting upper and lower heat exchange units adjacent to each other so that the internal pipes of the heat exchange units in each layer are connected in an S-shape; A heat exchanger comprising a city import and export port connected to the lowermost layer of the heat exchange unit and a city export and export port connected to the uppermost layer of the heat exchange unit; A zigzag-type wastewater flow channel formed by a space formed by alternately spaced space between one side of the layered heat exchange unit constituting the heat exchanger and an inner wall of the tank and a space between the upper and lower heat exchange units, and the wastewater on the uppermost layer of the wastewater flow channel. A wastewater flow path including a wastewater inlet formed at an upper portion of the tank for injecting the wastewater, and a wastewater outlet formed at a lower portion of the tank to discharge the wastewater collected at the lowermost layer of the wastewater flow path to the outside of the tank; Including, The distributor having a channel-type channel structure having a drainage hole having a predetermined interval in the longitudinal direction thereof is installed at both bottoms so that the wastewater introduced from the wastewater inlet is evenly distributed to the city part as wastewater flowing water of the uppermost heat exchange unit. Waste water heat recoverer, characterized in that. The method according to claim 1, The heat exchange unit constituting the heat exchanger has a structure in which a thin pipe-type heat exchanger tube is tightly connected horizontally without gaps to form a plate-shaped thermal contact surface as a whole, and each heat exchanger tube is inserted into a hole formed through the partition wall to form an outer side of the partition wall. Is connected to the connector, the connector is coupled in communication with each heat exchanger tube constituting the upper layer heat exchanger unit at the top, and the one side converges with respect to the upper and lower sides by being coupled in communication with each heat exchanger tube constituting the lower layer heat exchanger unit at the bottom. The other side of the pipe is a waste heat heat recovery device, characterized in that the function of the distribution pipe is formed through the heat exchange unit of each layer through the heat exchange unit from the city import and export port to form a continuous pipeline. delete The method according to claim 1, Distributor of channel type structure is installed so that the lengthwise direction is open to both bulkheads and one end is open toward the wall so that the wastewater introduced from the wastewater inlet is evenly distributed to the municipal part as the wastewater flowing water of the uppermost heat exchange unit. A wastewater heat recovery system characterized in that. A box-type tank formed with an inspection opening so as to open the inside and to clean or repair, if necessary; A plurality of heat exchange units coupled in a layered structure through the partition walls fixed to both sides of the tank, and connectors connecting upper and lower heat exchange units adjacent to each other so that the internal pipes of the heat exchange units in each layer are connected in an S-shape; A heat exchanger comprising a city import and export port connected to the lowermost layer of the heat exchange unit and a city export and export port connected to the uppermost layer of the heat exchange unit; A zigzag-type wastewater flow channel formed by a space formed by alternately spaced space between one side of the layered heat exchange unit constituting the heat exchanger and an inner wall of the tank and a space between the upper and lower heat exchange units, and the wastewater on the uppermost layer of the wastewater flow channel. A wastewater flow path comprising a wastewater inlet formed at an upper portion of the tank for injecting the wastewater, and a wastewater outlet formed at a lower portion of the tank for discharging wastewater collected at a lower layer of the wastewater flow channel to the outside of the tank; A brush having a hair structure between the upper and lower heat exchange units, the brush having a hair contacting the surface of the heat exchange unit, the brush cleaning the surface of the heat exchange unit while moving between the two partition walls by reciprocating means; Wastewater heat recoverer comprising. The method according to claim 5, The reciprocating means of cleaner, Hook the rollers installed on the outer side of the bulkhead so that the wires pass through the center of the upper and lower heat exchange units in each layer, and one of the rollers connects a drive motor capable of reverse rotation, and couples the brush body to the wires passing through the center of the heat exchange unit. The brush coupled between the layers to contact the surface of the heat exchange unit is coupled to the reciprocating stroke point of the wires of each layer, and the sensor is installed at both ends of the stroke between the diaphragms to provide the forward and reverse motion signal of the drive motor. Waste water heat recovery device characterized in that the brush is made by reciprocating between the two partition walls by the forward rotation of the cleaning is made The method according to claim 6, Brush is a waste water heat recovery, characterized in that coupled to the structure coupled to the wire on both sides of the brush body. The method according to claim 6, Waste water heat recovery device characterized in that the wire is provided with a tension control device for controlling the tension change in accordance with the external temperature. The method according to claim 6, The chain sprocket is coupled to the wire drive shaft connected to the drive motor, and the chain is connected to the wire of the reciprocating stroke section made by the chain sprocket, and a pipe for guiding the chain is installed to make the chain flow. Waste water heat recovery, characterized in that configured to. The method according to claim 6, The roller shaft, which is located in the middle of the wire driving shaft, is connected by using a chain and a chain sprocket, a chain sprocket is installed on the shaft, and the wire is connected by a chain in a reciprocating stroke distance section formed by the chain sprocket. Waste water heat recovery device characterized in that the intermediate portion is formed with a reciprocating section by the chain. The wastewater heat recovery system according to claim 5, wherein the cleaner is driven at a predetermined time interval by a timer. The method according to claim 5, The cleaner is provided with a temperature sensor at each of the wastewater inlet and outlet, and the wastewater heat recovery, characterized in that configured to be driven when the temperature difference between the two measured values is less than the set value. A box-type tank formed with an inspection opening so as to open the inside and to clean or repair, if necessary; A plurality of heat exchange units coupled in a layered structure through the partition walls fixed to both sides of the tank, and connectors connecting upper and lower heat exchange units adjacent to each other so that the internal pipes of the heat exchange units in each layer are connected in an S-shape; A heat exchanger comprising a refrigerant inlet connected to a lowermost layer of the heat exchange unit and a refrigerant outlet connected to a top layer of the heat exchange unit; A zigzag-type wastewater flow channel formed by a space formed by alternately spaced space between one side of the layered heat exchange unit constituting the heat exchanger and an inner wall of the tank and a space between the upper and lower heat exchange units, and the wastewater on the uppermost layer of the wastewater flow channel. A wastewater flow path comprising a wastewater inlet formed at an upper portion of the tank for injecting the wastewater, and a wastewater outlet formed at a lower portion of the tank for discharging wastewater collected at a lower layer of the wastewater flow channel to the outside of the tank; A brush having a hair structure between the upper and lower heat exchange units, the brush having a hair contacting the surface of the heat exchange unit, the brush cleaning the surface of the heat exchange unit while moving between the two partition walls by reciprocating means; Wastewater heat recoverer comprising.

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