KR100760856B1 - Wastewater Heat Recovery Machine - Google Patents

Abstract

The present invention relates to a wastewater heat recovery system for exchanging heated wastewater from top to bottom and cold water flowing from top to bottom in zigzag to heat exchange with each other. By forming an air discharge means such as the air discharge hole 10 in the bottom surface to prevent the formation of an air layer on the bottom surface of the heat exchange plate 2 so that the heat exchange rate is high, and the reinforcement frame 14 on the bottom surface of the heat exchange plate (2) Welded at regular intervals to prevent sagging of the heat exchanger plate 2 to improve productivity and durability, and the opening and closing plate 16 is formed on the main body side wall 18 to easily check the internal condition and to completely remove the residue without disassembling the main body. The steel reinforcement material (17) (19) and the insulation material (20) are formed on the roof (12) and the side wall (18) of the main body to prevent the waste water heat loss and durability of the waste water heat recovery system. It will have to increase.

Description

Wastewater Heat Recovery Machine {APPARATUS FOR CELLECTING THE WASTE-WATER HEAT}

1: Internal structure diagram of the present invention

2 is a cross-sectional view showing the flow of the present invention wastewater and fresh water

3 is an exploded perspective view of the present invention one side plate and the connecting member

4 is an exploded perspective view of the diaphragm and the connecting member of the opposite side of FIG.

5 is a cross-sectional configuration of the coupling plate and the connecting member to the heat exchange plate of the present invention

6: Bottom perspective view of the heat exchanger plate of the present invention

7 is an internal configuration diagram of another embodiment of the present invention

8 is a perspective view of the present invention in the disassembled opening and closing plate

9 is a perspective view of a state in which the present invention insulation

10: perspective view of the present invention

<Description of the symbols for the main parts of the drawings>

(2)-heat exchange plate (2a)-square pipe

(2b)-short pipe (3) (3 ')-diaphragm

(3a) (3a ')-through hole (4)-connection member

(5)-Wastewater Falling Hole (10)-Air Vent

(12)-Roof (14)-Reinforcement Frame

(16)-Switchboard (17) (19)-Steel reinforcement

(18)-Sidewalls (20)-Insulation

The present invention relates to a wastewater heat recovery system for allowing the heated wastewater and cold fresh water to exchange heat with each other.

Heat-exchanging plates made by welding multiple rectangular pipes laterally are stacked up and down at regular intervals so that the heated waste water flows zigzag from top to bottom between heat exchange plates, and cool fresh water flows zigzag from bottom to top. The wastewater heat exchanger to heat exchange with each other is known from the Utility Model Registration No. 256619 by the applicant.

The conventional wastewater heat recovery device has advantages such as the waste water heat recovery rate is very high by increasing the contact area between the waste water and the fresh water within the same volume, but the waste water heat recovery rate is gradually lowered and the productivity is lowered, and internal cleaning is not easy. There existed a problem, such as being unsatisfactory also in durability.

In general, there are many bubbles in the wastewater, and the wastewater flows up between the heat exchanger plates, and bubbles in the wastewater float up and collect, but there is no configuration to properly discharge them. If an air layer formed by air bubbles is formed between the bottom of the heat exchange plate and the wastewater flowing below the air layer, the air layer interferes with the heat exchange between the fresh water flowing into the heat exchange plate and the bottom of the heat exchange plate. (Up to 40%).

However, air emissions can lead to the loss of waste heat if not carefully taken into account.

In addition, the heat exchanger plate is constructed by welding metal pipes horizontally, and high-pressure fresh water flows inside, and the center part of the heat exchanger plate is bent downward due to its use. Not only does the productivity of the heat exchanger plate fall down due to disturbance of the flow of the heat exchanger, but also the welding part (welding part) of the square pipe constituting the heat exchanger plate is damaged, thereby shortening the service life of the wastewater heat exchanger.

In general, the wastewater contains a lot of waste, so the wastewater heat recovery system in which the waste water flows should be internally cleaned from time to time.The internal cleaning method is to stop the operation of the wastewater heat recovery system and put the fresh water into the wastewater inlet so that the fresh water flows into the wastewater flowing space. Although cleaning is performed in this way, the wastes accumulated inside can not be completely discharged, and some wastes are accumulated in the waste water heat recovery machine, which hinders the smooth flow of waste water. Disassembler should be disassembled and cleaned.

However, due to internal pressure, the wastewater heat recovery system is not easily disassembled because most internal and external components are firmly combined by welding or riveting methods, so it is very difficult to clean and decompose the amount of debris inside. There was an unknown problem.

Since the high pressure (7 ~ 10kg / cm2) is formed by the fresh water and the waste water inside the waste water heat recoverer, the roof of the conventional waste water heat recoverer is made of iron plate for the effect of pressure resistance and appearance on the high pressure. It is arc-shaped.

However, even if the roof has a round shape, the welding part may be broken due to the high pressure inside or the steel plate itself may be torn and torn, thereby shortening the service life of the wastewater heat recovery device.

The present invention has been made to solve the above problems, by forming an air discharge means such as an air discharge hole on the bottom of the rectangular pipe shortly configured to form a waste water drop hole among the plurality of square pipes constituting the heat exchange plate, bubbles in the waste water rises zigzag The heat exchange rate was significantly increased by preventing the formation of an air layer between the heat exchanger plate and the waste water while minimizing the loss of waste water heat.

The reinforcing frame was welded to the bottom of the heat exchanger plate transversely to prevent sagging of the heat exchanger plate, thereby preventing the productivity from being gradually lowered by use and increasing durability. At this time, the reinforcing frame slightly protrudes below the bottom of the heat exchanger plate, but the degree of protrusion of the reinforcing frame is small, and the wastes that hinder the flow of waste water sink and do not float upward. However, the problem of protrusion of the reinforcement frame can be solved by forming a slightly higher gap between the heat exchange plates.

Opening / closing plate is formed on one side of the main body of waste water heat recovery system and fastened with bolts for easy separation of the open / close board, so that the open / close board can be checked frequently to check the internal condition. Was removed and a cleaning tool was put into the opening formed by the opening and closing plate to completely clean the remaining debris without being removed by the fresh water.

It is easy to install steel reinforcement by making flat shape without rounding the roof of waste water heat recovery machine.We welded several steel reinforcements vertically and horizontally on the flat roof which is easy to construct, reinforcing the roof and applying steel reinforcement at regular intervals to the outer surface of the side wall. Welded reinforcement only vertically so that the body can withstand high pressure for a long time. As steel reinforcement protrudes on the outer surface of waste water heat recovery machine, not only the body is reinforced but also easy to install insulation material. This minimizes the loss of wastewater heat to the outside.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the heat exchanger plates 2 obtained by welding several square pipes 2a laterally in the wastewater heat recovery unit 1 are laminated at regular intervals up and down. By welding the short pipe 2b shorter than (2a), the wastewater dropping hole 5 was formed between one end of the short pipe 2b and the diaphragm 3.

As shown in FIG. 2, both side inlets of the heat exchange plate 2 are connected to each other by the left and right partition plates 3, 3 ′ and the connecting members 4, 4 ′.

In the left and right plates 3 and 3 ', a plurality of through holes 3a and 3a' are formed, as shown in FIGS. 3 and 4, and the through holes 3a and 3a 'are shown in FIGS. Likewise, the inlets of the square pipes 2a of the heat exchange plates 2 are respectively inserted.

As shown in FIG. 1, the short end pipe 2b of the square pipes 2a constituting the heat exchange plate 2 is configured so that one side is shorter than the other square pipe 2a, and this configuration is a heat exchange plate of each layer. The waste water dropping holes 5 formed between the short sides of the short pipes 2b and the diaphragms 3 and 3 'are formed on opposite sides of each layer so that the waste water is formed between the heat exchange plates 2, respectively. Zigzag from top to bottom.

As shown in FIGS. 3 and 4, an end portion 2b-1 of the side of the end pipe 2b of the heat exchange plate 2, on which the wastewater dropping hole 5 is formed, is separated from the diaphragm 3, 3 ′. Located at intervals of the size of the waste water dropping hole (5). The opposite end 2b-2 is formed to be shorter than the end of the other square pipe 2a by the thickness of the diaphragms 3 and 3 'so that the end of the other square pipe 2a is When penetrating through the through holes 3a and 3a ', the end portion 2b-2 of the short pipe 2b comes into contact with the inner surface of the diaphragm 3 and 3' and the portion without the through holes 3a and 3a '. .

Since the end of the square pipe 2a penetrates the through holes 3a and 3a 'and is welded with the diaphragms 3 and 3', only fresh water flows into the square pipe 2a.

The end portion 2b-2 of the short pipe 2b is welded to the inner surface of the diaphragm 3 and 3 'between the through holes 3a and 3a', so that the waste water does not flow out or the fresh water does not flow.

As shown in Figs. 2 and 5, the diaphragms 3 and 3 'are welded with connecting members 4 and 4' for guiding the flow of fresh water. As shown in FIGS. 3 and 4, the connecting members 4 and 4 ′ are arcuate in cross section, and as shown in FIGS. 2 and 5, one of the connecting members 4 and 4 ′ connects the inlets of the two heat exchange plates 2 to each other. Configuration.

However, the bottom and top connecting members 4 and 4 'on which the fresh water inlet 6 and the fresh water outlet 7 are formed are connected to one heat exchange plate 2, respectively.

The wastewater is formed in the opposite direction to each layer by the wastewater dropping holes 5 formed by the single pipe 2b, and after the wastewater flows into the inlet 8, the wastewater dropping holes 5 in each layer formed in the opposite direction. Since the flow flows along the zigzag as shown by the arrow (A) showing the wastewater flow direction in Figure 2 is discharged to the wastewater outlet (9).

The fresh water enters the fresh water inlet 6 at the bottom by the pumping pressure of the pump (not shown) and flows upwards, and as shown in FIG. According to the guidance of 4 ', the inside of the heat exchange plate 2 is zigzag upward as shown by the arrow B showing the fresh water flow direction, and then discharged to the fresh water outlet 7.

The configuration of the heat exchange plate 2 is not necessarily limited to those exemplified in the present invention because the waste water and the fresh water may be zigzag in different directions in the waste water heat recovery system.

As shown in FIGS. 1 and 6, the air discharge holes 10 are drilled in the bottom surface of any one of the short pipes 2b of the heat exchange plate 2 in each layer to form an air layer formed by air bubbles in the bottom surface of the heat exchange plate 2. Do not

The air discharge hole 10 may be drilled only in one single pipe 2b, but may be drilled in two or all three if necessary.

The inlet of the short pipe (2b) for drilling the air discharge hole 10 is open for air discharge, so the waste water flows in and the air is discharged by countercurrent to the waste water flow. The inlet of the short pipe 2b that does not penetrate the air discharge hole 10 does not have to be closed or burned out.

In this way, the bubble of the waste water flow enters the short pipe 2b through the air discharge hole 10, moves to the waste water dropping hole 5, goes up the waste water dropping hole 5, and then the upper heat exchange plate 2 The flow of wastewater flows back through the air discharge hole 10 through the air discharge hole 10 to the opposite wastewater dropping hole 5, and goes back up again, moving upward and zigzag, and the roof 12 of the wastewater heat recovery unit 1 Is discharged to the air discharger (13) installed in.

Instead of drilling the air hole 10 in the bottom surface of the short pipe 2b, the groove 11 may be formed long as shown in FIG.

When the groove 11 is formed on the bottom surface of the end pipe 2b of the heat exchange plate 2, the air moves upwardly zigzag along the groove 11.

The groove 11 may also be formed in one or more end pipes 2b.

As shown in FIG. 6, the bottom of the heat exchange plate 2 of each layer was welded to the steel reinforcement frame 14 at regular intervals to prevent the center portion of the heat exchange plate 2 from being struck down by use.

As shown in FIG. 7, an opening 15 having a predetermined size is formed on the sidewall of the wastewater heat recovery 1, and the opening 15 is covered with an opening plate 16 and fastened with a plurality of bolts to facilitate separation. The cleaning tool can be used to completely clean up the residues without disassembling the body.

Rubber packing (not shown) is used between the opening 15 and the opening and closing plate 16 to ensure good sealing.

The opening and closing plate 16 may form one or more.

As shown in FIG. 7, the roof 12 of the wastewater heat recovery 1 is planar, and the steel reinforcement 17, such as an H beam or an I beam, is longitudinally and horizontally welded, and the same steel reinforcement 19 is also applied to the front and rear side walls 18. By welding only the bell to enhance the robustness of the body so that the body can withstand the internal pressure of the wastewater heat recovery (1) for a long time.

As shown in FIG. 9, the heat insulating material 20 is adhered between the steel reinforcement material 17 and 19 protruding from the roof 12 and the side wall 18 of the wastewater heat recovery device 1, and the left and right connecting members 4 and 4 ′. The insulation 20 was also adhered to the outer surface to prevent loss of wastewater heat.

The heat insulating material 20 is not bonded to the opening and closing plate 16.

Since the roof 12 and the side wall 18 of the wastewater heat recovery 1 are surrounded by an iron plate, the heat insulating material 20 is not exposed and the appearance is clean as shown in FIG. 10.

Reference numeral 21 is an air injection check valve for injecting air during internal cleaning, and 22 is a loop connection pipe.

As described above, in the present invention, since no air layer is formed on the bottom surface of the heat exchanger plate 2, the heat exchange rate is remarkably high, and the air moves in a zigzag to be discharged so that the waste water heat loss is very small.

The reinforcement frame 14 prevents the center of the heat exchange plate 2 from being crushed to improve productivity, high durability, and easily check the internal state using the opening and closing plate 16, and completely remove residual residues without disassembling the body. Since it can be cleaned, the productivity of the wastewater heat recovery 1 is remarkably improved and the management is very convenient.

By additionally configuring the steel reinforcing material (17) (19) and the heat insulating material 20, the service life of the wastewater heat recovery (1) is long, and the waste water heat loss is prevented.

Claims (6)

The heat exchange plate 2 obtained by welding the square pipe 2a and the end pipe 2b laterally is stacked up and down at a predetermined interval, and the diaphragms 3 and 3 'and the connecting member 4 are disposed on both sides of the heat exchange plate 2 ( 4 '), but wastewater heat dropping holes (5) formed between the short pipe (2b) and the diaphragm (3) (3') are formed on the opposite side of each layer, so that the wastewater flowing between the heat exchange plates (2) is zigzag downward. Wastewater heat to allow the connecting members (4) and (4 ') to connect the two ends of the heat exchanger plate (2) to be separated from each other by two layers. In the recovery machine 1, A wastewater heat recovery system formed by forming a plurality of air discharge holes (10) as air discharge means on the bottom surface of the end pipe (2b) of the heat exchange plate (2). The heat exchange plate 2 obtained by welding the square pipe 2a and the end pipe 2b laterally is stacked up and down at a predetermined interval, and the diaphragms 3 and 3 'and the connecting member 4 are disposed on both sides of the heat exchange plate 2 ( 4 '), but wastewater heat dropping holes (5) formed between the short pipe (2b) and the diaphragm (3) (3') are formed on the opposite side of each layer, so that the wastewater flowing between the heat exchange plates (2) is zigzag downward. Wastewater heat to allow the connecting members (4) and (4 ') to connect the two ends of the heat exchanger plate (2) to be separated from each other by two layers. In the recovery machine 1, A wastewater heat recovery system formed by forming a recess (11) as an air discharge means in the bottom face of a short pipe (2b) of a heat exchange plate (2). delete The wastewater heat recovery system according to claim 1 or 2, wherein a reinforcing frame (14) is formed on the bottom of the heat exchange plate (2). The wastewater heat recovery system according to claim 1 or 2, wherein the steel reinforcement material (17) and the insulation material (20) are formed on the roof (12) and the sidewall (18) of the waste water heat recovery system (1). The heat exchange plate 2 obtained by welding the square pipe 2a and the end pipe 2b laterally is stacked up and down at a predetermined interval, and the diaphragms 3 and 3 'and the connecting member 4 are disposed on both sides of the heat exchange plate 2 ( 4 '), but wastewater heat dropping holes (5) formed between the short pipe (2b) and the diaphragm (3) (3') are formed on the opposite side of each layer, so that the wastewater flowing between the heat exchange plates (2) is zigzag downward. Wastewater heat to allow the connecting members (4) and (4 ') to connect the two ends of the heat exchanger plate (2) to be separated from each other by two layers. In the recovery machine 1, A wastewater heat recovery system formed by forming a plurality of air discharge holes (10) as air discharge means on the bottom surface of the end pipe (2b) of the heat exchange plate (2) and opening and closing plate (16) on the side wall.

Images