KR20000019521U - A recycling device of used heat for a boiler - Google Patents

Abstract

The present invention relates to a waste heat recovery apparatus of a hot water boiler, and in particular, the boiler is operated by first heating the water recovered to the hot water boiler through the greenhouse as waste heat discharged into the hot water boiler and supplying the heated hot water to the hot water boiler. It saves time and saves fuel while maximizing heating efficiency.

Collecting means (A) for heating the water in the stack (2) of the hot water boiler (1) to supply hot water in the state of the primary heating with combustion gas to the boiler (1),

The heat collecting means (A) is formed on both sides of the outer cylinder (3) to the end (4, 5), one end (4) is connected to the stack (2) of the boiler (1) and the other end (5) to the outside It is connected to the chimney (2) and forms the connection portion of the end (4, 5) and the outer cylinder (3) to the inclined surface (6,7) and to provide a heat insulating layer (8) outside the outer cylinder (3), inside the outer cylinder (3) The body 10 having a curved front surface is provided on both sides to connect the bodies 10 with several pipes 12, and the body 10 on the boiler 1 side is a hot water return pipe of the boiler 1. (1a) and the tubular body 13 are connected, and the opposite side is connected to the tubular body 14 of the side collect | recovered via the greenhouse B, The summary is characterized.

Description

Waste water recovery device of hot water boiler {A recycling device of used heat for a boiler}

The present invention relates to a waste heat recovery device of a hot water boiler, in particular, the waste heat discharged by the hot water boiler as a waste heat is discharged to the hot water boiler through the greenhouse as the primary heating and supplying the heated hot water to the hot water boiler operating time of the boiler This saves fuel while maximizing heating efficiency.

In general, in greenhouses for agriculture, a heater is operated to maintain a temperature necessary for growing crops. A hot water boiler used as a conventional heater is installed inside or outside the greenhouse, and pipes are piped to the greenhouse to heat the greenhouse. It is.

In this case, the thermal efficiency of the boiler is approximately 65-75%. In view of this, the hot water boiler of the above method has a large heat loss by releasing the combustion gas containing a large amount of heat into the atmosphere as it is.

The present invention has been made to solve the problems as described above, to provide a heat collecting means in the stack of hot water boilers commonly used, and configured to heat the water recovered to the hot water boiler through the greenhouse and heated It is characterized by allowing water to be supplied to the hot water boiler to increase heating efficiency while saving fuel.

1 is a cross-sectional view of an embodiment of the present invention

Figure 2 is a side cross-sectional configuration of the heat collecting means of the present invention

Figure 3 is a front sectional view showing a heat collecting means of another embodiment of the present invention

☞ Explanation of symbols used in the main part of the drawing ☜

A: heat collecting means B: greenhouse

1: boiler 2: stack

3: outer cylinder 4,5: end

6,7: inclined surface 8: heat insulation layer

11: front part 10: fuselage

12 pipe pipe 13,14 pipe

1 is a cross-sectional configuration diagram of an embodiment of the present invention, Figure 2 shows a side cross-sectional configuration diagram of Figure 1 looks at the configuration and operation.

The present invention provides a heat collecting means A capable of heating water in the stack 2 of a hot water boiler (hereinafter, referred to as a boiler) that is generally widely used and supplies hot water in the state of being primarily heated with combustion gas to the boiler 1. Configure it.

The heat collecting means A forms both ends 4 and 5 of the outer cylinder 3 so that one end 4 is connected to the stack 2 of the boiler 1 and the other end 5 is connected to the stack 2 to the outside, and the ends 4 and 5 and the outer cylinder 3 are formed. The connection part of is formed with the inclined surface 6 and 7, and the heat insulation layer 8 is provided in the outer side of the outer cylinder 3.

Inside the outer cylinder 1, the body 10 having a curved front surface is provided on both sides, and the body 10 is connected by several pipes 12, and the boiler 1 side body 10 is connected to the hot water recovery pipe 1a and the body 13 of the boiler 1 by the opposite side. Is supplied from the supply pipe 1b of the boiler 1 and connected to the pipe 14 on the side recovered through the greenhouse B.

3 shows another embodiment of the present invention.

In constituting the heat collecting means A having the above-described configuration, the tubular body 13, 14 and the tubular 20 which are connected to the body 10 are provided with the tubular body 20 so that the space 21 is provided outside the outer cylinder 3 and the end portions 4, 5 of the collecting means A. The pipe 22 is a pipe and the heat insulation layer 23 is formed outside the cylinder 20.

The present invention having such a configuration is as follows.

When power is supplied to the present invention as shown in FIG. 1, the water is heated in Boiler 1 and the heated water is supplied to Greenhouse B through a circulation pump and heated, and the water recovered through Greenhouse B is directly transferred to Boiler 1. It is to be recovered through the heat collecting means A without recovery to recover the water heated by the combustion gas in the heat collecting means A to the boiler 1, the combustion gas discharged to the stack 2 of the boiler 1 is approximately 350 ~ 400 ℃ The temperature rises and the temperature of the water recovered by the heat collecting means A is increased by 2 to 3 ° C.

Inclined surface of the outer cylinder 3 and the end portion 4, 5 in order to transfer more heat to the fuselage 10 or the pipe tube 12 inside the collecting means A is not discharged directly to the outside of the collecting means A of the present invention 6,7, and the front part of the body 10 is formed to be a vortex phenomena in the flow of the incoming combustion gas inside the moment, and a heat insulating layer 8 is provided on the surface of the outer cylinder 3 as a means for reducing heat emission from the outside air It was.

In addition, the present invention is to install a pipe connecting the heat collecting means A, boiler 1 and the greenhouse B in order to recover the waste heat more efficiently, the lower side (the side recovered from the greenhouse is the fuselage body connected to the outside) higher side The water can be circulated to the boiler body.

And the configuration as shown in Figure 3, in the heat collecting means A for first heating the water through the fuselage 3 and the pipe tube 12 as described above, the heat discharged to the outside through the outer cylinder 3 to the outside of the outer cylinder 3 to collect the heat again 20 to provide a space 21 between the cylinder 20 to allow the water to pass through and pipe 22 to pipe 13 and 14 connected to the body 10 to more effectively utilize the heat released to the outside to increase the temperature of the water. To make it possible.

Experimental results before and after the installation of the waste heat recovery device consisting of the above configuration was able to obtain the following effects.

The thermometer used for the experiment measured the temperature using the digital contact thermometer.

Temperature of water recovered by waste heat recovery system (℃) Water temperature after passing through waste heat recovery system (℃) Temperature difference (℃) One 56.4 58.5 2.1 2 55.7 57.9 2.2 3 58.1 60.2 2.1 4 57.1 59.6 2.5 5 57.4 60.7 3.3 6 63.7 68.7 3.6

In general, considering that the difference between the temperature of the hot water supplied from the boiler and the temperature recovered is 6 ~ 8 ℃, as shown in the above experimental results when using the waste heat recovery device of the present invention by using the same fuel more than 2 ℃ average You can see that you can get heat.

The waste heat recovery apparatus of the hot water boiler of the present invention heats the water of the combustion gas discharged from the stack 2 to the heat collecting means A, and supplies the water to the boiler 1 so that the temperature of the water is increased by only the waste heat discharged from the boiler. You can save fuel while heating the greenhouse more effectively.

The present invention provides a heat collecting means A in the stack 2 of the hot water boiler 1, which is commonly used as described above, and heats the water first with only waste heat of the combustion gas, and reintroduces it into the boiler 1 so that the second heating is performed. It can be easily attached to the hot water boiler in use and the present design is a very practical design to obtain the effect of increasing the heating efficiency while significantly reducing fuel.

Claims (2)

Collecting means A for heating the water in the stack 2 of the hot water boiler 1 to supply the hot water in the state of primary heating with the combustion gas to the boiler 1, The heat collecting means A is formed on both sides of the outer cylinder 3 to the end 4, 5, one end 4 is connected to the stack 2 of the boiler 1, the other end 5 is connected to the stack 2 to the outside, and the connecting portion of the end 4, 5 and the outer cylinder 3 To the inclined surface 6,7 and to provide a heat insulating layer 8 on the outside of the outer cylinder 3, Inside the outer casing 3, a fuselage 10 having a curved front surface is provided on both sides to connect the fuselage 10 with several pipes 12, and the boiler 1 side fuselage 10 is connected to the hot water collection pipe 1a of the boiler 1 and the tube 13 and the opposite side. Waste heat recovery apparatus of the hot water boiler, characterized in that connected to the tube 14 of the side to be recovered through the greenhouse B. The method of claim 1, The cylinder 20 is provided so that the space 21 is provided outside the outer cylinder 3 and the end portions 4 and 5 of the heat collecting means A. The pipes 13 and 14 and the cylinder 20 connected to the fuselage 10 are piped to a pipe 22, and a heat insulation layer 23 is formed outside the cylinder 20. One configuration.