KR200242235Y1 - Boiler .. - Google Patents

Abstract

(One). Technical field to which the invention belongs

The present invention relates to an exhaust gas heat exchanger, which is an example of a device for preheating and supplying cold water supplied to a hot water boiler by recovering exhaust gas heat that flows out when the domestic hot water boiler 4 is used.

(2). Purpose of devising

The present invention devises a device for preheating hot water and hot water for domestic hot water boilers by using preheated exhaust gas to reduce the waste of fuel by reducing the heating time of hot water boiler water. It is intended to extend the life of the hot water boiler (4) by reducing the thermal stress by reducing the temperature difference between the cold water and the water in the hot water boiler.

(3). Constitution

Exhaust gas heat exchanger of the present invention is installed between the exhaust side of the hot water boiler (4) and the chimney (5).

The exhaust gas heat exchanger 1 constituting the water heater preheater for the domestic hot water boiler combines two cylinders to form an egg-shaped hot water preheating chamber 2, and the hot water inlet / outlet is provided on the lower left and upper right. In the upper part of the hot water preheating chamber (2), the exhaust pipe (3) having a cylindrical model was formed at the upper part of the body than the inlet and the outlet of the exhaust passage. A plurality of communication tubes are formed so as to communicate with the hot water preheating chamber (2) in all directions across the wall, and the communication tube (6) having a plurality of circular fins (8) formed on the outer surface of the communication tube is front to rear. The circular communication tube 7 was formed to be inclined upward from the left side to the right side, and the two communication tubes alternately alternately stacked with each other to form a exhaust pipe 3 having a plurality of communication tubes embedded therein, and a heating water preheating tube formed so as to coil the peripheral circumference in a coil form. (9), consisting of The exhaust gas heat exchanger (1) for domestic hot water boiler according to claim is provided.

(4). Effect of design

Exhaust gas heat exchanger (1) equipped with a water supply preheating device for domestic hot water boilers of the present invention has a low installation place and cost, and is easy to install and separate, and when installed and used, the heating efficiency of the hot water boiler is improved. As a result, fuel is saved, and the temperature difference with water in the boiler is reduced, thereby reducing the thermal stress, thereby helping to extend the life of the boiler.

Description

Exhaust gas heat exchanger with water feed preheater for domestic hot water boiler.

The present invention is an exhaust gas heat exchanger comprising a water heater preheating device for a hot water boiler using the exhaust gas heat of a domestic hot water boiler, when using a domestic hot water boiler to recover the exhaust gas heat discharged through the exhaust pipe, water supply to the hot water boiler The preheated hot water and the cold water of the heating water can be preheated to the boiler, improving the heating efficiency of the hot water boiler 4, reducing fuel waste, and reducing the thermal stress by reducing the temperature difference between the incoming hot water and the water in the boiler. The purpose is to extend the life of the hot water boiler by reducing the.

In general, it is helpful to save fuel and extend boiler life by installing ECONOMIZER in the large boiler of the central ship type of large ships or apartments. As a result, practicality is not obtained, and as illustrated in FIG. 1, since the chimney 5 is directly connected to the hot water boiler 4, the exhaust gas heat of the boiler is simply thrown out.

Therefore, the present invention was devised in view of the above-described problems, so that hot water and hot water introduced into a domestic hot water boiler can be preheated and preheated, so that it can be installed simply and conveniently at a low price, and stably. It is for providing the produced exhaust gas heat exchanger (1).

1 is a perspective view showing a conventional domestic hot water boiler and the pipe disconnection display

2 is a perspective view of a domestic water supply boiler feedwater preheater exhaust gas heat exchanger installed in a hot water boiler according to the present invention

FIG. 3 is a layout view showing each part of the exhaust gas heat exchanger of the embodiment. FIG. 4 is a partial cutaway view of an assembly of a communication pipe in the exhaust pipe 3 and a passage. FIG. 5 is a view of the exhaust gas heat exchanger of the embodiment. 6 is a side cross-sectional view of the exhaust gas heat exchanger of the embodiment. FIG. 7 is a front sectional view of the exhaust gas heat exchanger of the embodiment. FIG. 8 is an exhaust gas heat exchanger of the embodiment. Illustrated diagram showing how to

<Description of the code | symbol about the principal part of drawing>

1. Exhaust gas heat exchanger 2. Hot water preheating chamber

3. Exhaust Pipe 4. Hot Water Boiler

5. Chimney 6. Dated pipe

7. Circular communication tube 8. Circular fin

9. Heating water preheating pipe 10. Hot water supply pipe

11. Hot water supply water pipe 12. Heating water supply pipe

Heating water return pipe 14.Heating water return pipe 15. Hot water inlet 16. Hot water outlet 17. Heating preheater inlet 18. Heating preheater outlet 19. Exhaust pipe assembly up and down 20. Heating water preheating pipe assembly up and down 21. Date (ㅡ) Communicator tube assembly front and rear 22. Circular tube assembly assembly left and right 23. Overpressure automatic discharge valve 24. Thermometer 25. Drain valve 26. Tightening bend 27. Circulating water pump 28. Expansion tube 29. Exhaust gas heat exchanger partial incision 30.Exhaust pipe partial incision 31. Rooftop water tank 32. Expansion tank

By recovering the exhaust gas heat of the domestic hot water boiler, the hot water hot water introduced into the hot water boiler and the cold water of the heating water are preheated in advance, and the hot water preheating chamber is formed by combining two cylinders in order to be introduced into the hot water boiler. 2) formed, the exhaust pipe assembly opening 19 in the upper and lower center of the hot water preheating chamber, and hot water inlet hot water inlet in the lower left and upper right. A water preheating tube assembly opening 20 is formed, and a hot water preheating chamber 2 is formed therein, and an exhaust pipe 3 formed of a cylindrical model having a wider center portion of the body than the inlet and the outlet of the exhaust passage is formed. A plurality of communication pipes were formed to communicate with the hot water preheating room in all directions across the wall and the wall. On the outer surface of the communication pipe, a plurality of circular fins (8), which formed a plurality of communication pipes (6), were formed from the front to the rear. , Round communication tube (7), silver It is formed to be inclined upward from the left to the right side, and the two communication tubes alternately alternate with each other, and the exhaust pipe (3) having a plurality of communication tubes embedded therein, and a heating water preheating tube (9) formed so as to wind the circumference in a coil form. An exhaust gas heat exchanger (1) having a water supply preheating device is provided in a domestic hot water boiler, which is characterized in the following. Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. 2 is a perspective view showing the chimney (5) is installed in the domestic hot water boiler (4) of the water supply pipe disconnection diagram and Figure 2 is a domestic hot water boiler (4) exhaust gas heat exchanger (1) of the water supply preheater according to the present invention ) Is a perspective view showing the installation and the disconnection of the water supply pipe, Figure 3 is a layout view showing each part of the exhaust gas heat exchanger (1) of the water supply preheater according to the present invention, Figure 4 is an exhaust pipe (3) passage As an exemplary view showing the assembling of the communication tube in a partial incision, hereinafter, a method for assembling and combining the exhaust gas heat exchanger 1 of the present invention is as follows. As shown in FIG. Where the exhaust pipe (3) front and side, and the left and right sides of the communication pipe assembly (21, 22) formed of a plurality of layers, the straight communication pipe (6) from the front to the rear, circular communication pipe (7) The circular pipe is leveled and is inclined upward from the left side to the right side to be fitted into the exhaust pipe (3) and the inner one, and assembled into the communication pipe assembly holes (21, 22), and the gap between the exhaust pipe wall and the communication pipe is fixed by welding. The gap is prevented from leaking water. In the order described above, the straight communication pipe 6 and the circular communication pipe 7 are alternately shifted to the exhaust pipe 3, the lower part and the upper part as shown in FIG. After the furnace floor has assembled the communicating pipes one by one, the exhaust pipe (3) The upper and lower parts are reassembled and assembled, and the gap is attached by welding to prevent the leakage of water to constitute the exhaust pipe 3. The heating water preheating tube 9 and the silver heating water preheating tube inlet 17 ) Is inserted from the inside of the heating water preheating pipe assembly opening 20 formed at the lower left side of the hot water preheating chamber 2 to form the heating water preheating pipe inlet 17. At this time, the heating water preheating tube (9) is placed so that the end of the inlet and outlet exits the hot water preheating chamber (5 to 10 cm), and then the gap between the heating water preheating tube (9) and the heating water preheating tube assembly opening (20) is Attach by welding to prevent water leakage. The assembled exhaust pipe (3), the heating water preheating tube (9) wound in a coil form, put into the circumference of the exhaust pipe assembly opening (19), the hot water preheating chamber (2) lower side, and then the hot water preheating chamber ( 2), Assemble the upper side and the lower side. At this time, the heating water preheating tube outlet 9 is assembled by inserting the heating water preheating tube 9 into the heating water preheating tube assembly opening 20 on the upper left side of the hot water preheating chamber 2 to form the heating water preheating tube outlet 18. Assembling the exhaust pipe (3) in the upper exhaust pipe assembly opening 19, and then the gap of the heating water preheating pipe assembly opening 20 through which the heating water preheating pipe outlet 18 passes through the hot water preheating chamber (2). The exhaust pipe 3 is fixed to the gap of the assembly opening 19 assembled with the hot water preheating chamber 2 by welding solder, so that the gap is not leaked when the water is filled in the hot water preheating chamber 2 and exhausted. After the gas heat exchanger 1 is completed, the outer surface of the gas heat exchanger 1 may be coated with a heat insulating material to insulate the exhaust gas heat exchanger. In the upper left portion of the hot water preheating chamber 2, the overpressure in the hot water preheating chamber 2 is increased. In the event of this occurrence, the overpressure automatic discharge valve 23 is provided so that the discharge is automatically performed. And a drain valve 25, and a thermometer 24 is provided on the side to view the temperature of the hot water preheating chamber 2. Fig. 5 shows a partial cutaway of an exhaust gas heat exchanger 1 having a water supply preheater. The operation of the exhaust gas heat exchanger 1 will be described as follows. Water in the hot water preheating chamber 2 is transferred from the rooftop water tank 31 to the hot water supply hot water supply pipe 10 to supply hot water with hot water. Inflow to the inlet (15) is filled in a number of (-) communication pipe (6) and circular communication pipe (7) formed in the hot water preheating chamber (2) and the exhaust pipe (3) passages, the water is hot water boiler ( 4) In use, while the exhaust gas heat is discharged out through the exhaust pipe 3, the flat communication pipe 6 formed with a plurality of fins 8 on the wall surface of the exhaust pipe 3 and the outer surface of the communication pipe is rearward. As, circular communication tube 7 is inclined upwardly to the side, two communication tubes are alternately formed with a layer, alternately The ventilation barrier of the exhaust through the communication tube is minimized, the maximum contact with the heat of the exhaust gas, the water in the communication tube is heated, come out front and rear and left and right sides to preheat the water in the hot water preheating chamber (2), wherein The water in the communication pipe and the water in the hot water preheating chamber (2) flow in all directions due to the convection effect caused by the difference in heating temperature, while preheating the hot water preheating chamber (2) and the whole water evenly. If not, preheated hot water is continuously provided to the hot water boiler (4), the preheated water is advanced to the hot water hot water outlet (16) in the upper right, hot water boiler through the hot water hot water supply pipe (10) The water supply for heating is transferred from the hot water boiler expansion tank 32 to the hot water boiler heating water supply pipe 12 to preheat the heating water in the lower left of the hot water preheating chamber 2. The preheated hot water velocity of the hot water preheating chamber 2 is entered along the inlet 17 and along the exhaust pipe 3 in the hot water preheating chamber 2, the heating water preheating tube 9 wound around the coil in the form of a coil. Preheated while going up to advance to the heating water preheating pipe outlet 18 to flow into the hot water boiler 4 through the heating water supply pipe 12. The exhaust gas heat exchanger 1 is installed in a domestic hot water boiler As a method, the hot water boiler exhaust side chimney 5 is removed, the exhaust gas heat exchanger 1 is put in place, and then tightened with a tightening bend 26 to be fixed to the hot water boiler and then the exhaust gas heat exchanger 1 , Put the chimney (5) on the top again to assemble. The hot water supply hot water pipe 10 is connected to the hot water supply hot water inlet 15, and the hot water supply hot water pipe 10 is connected to the hot water hot water outlet 16 and introduced into the hot water boiler 4. The heating water connects the heating water supply pipe 12 to the heating water preheating pipe inlet 17, and connects the heating water supply pipe 12 to the heating water preheating pipe outlet 18 to enter the hot water boiler. There is no need for complicated equipment installation, and the installation and separation is easy and requires less equipment, the exhaust gas heat exchanger 1 of the present invention is a simple and economical one that can be used for all domestic hot water boilers.

As described above, when using the exhaust gas heat exchanger (1) having a water supply preheater for domestic hot water boiler of the present invention, the heating efficiency of the hot water boiler (4) is improved to save fuel, the hot water boiler (4) ) The thermal stress is reduced by reducing the temperature difference between the water and the water, which helps to extend the life of the boiler, and the preheated hot water is continuously supplied when the hot water is used, so it can have a close effect even without the hot water function. In addition, exhaust soot is filtered and discharged, which is effective in preventing environmental pollution.

Claims (2)

In an exhaust gas heat exchanger (1) equipped with a water supply preheating device for a domestic hot water boiler, or a device for preheating hot water and heating water, and entering the hot water boiler (4), Combined with two cylinders, it is equipped with an egg-shaped hot water preheating chamber (2), and the exhaust pipe assembly opening (19) in the lower and upper center, the hot water supply hot water inlet (15) in the lower left and the hot water hot water outlet in the upper right (16), a hot water preheating chamber (2) having a heating water preheating pipe assembly (20) at the lower left and an upper portion thereof, and a cylindrical exhaust pipe having a body portion wider than the inlet and the outlet of the exhaust passage. (3), which is provided, the passage wall and the hot water preheating chamber (2) across the wall and the wall in one direction to communicate in one direction (6), the front to the rear, circular communication tube (7), Is provided with an inclined upward from the left side to the right side, the exhaust pipe (3) having a plurality of communication pipes built in layers alternately alternately with each other, and a heating water preheating tube (9) formed with a coil wound around the perimeter. An exhaust having a water supply preheater for domestic hot water boilers, characterized in that Heat exchanger., The exhaust pipe (3) according to claim 1, characterized in that it is provided with a straight communication pipe assembly (21) in the front and rear on the passage wall surface, and a circular communication pipe assembly (22) on the left and right sides of the passage. Exhaust gas heat exchanger.