KR100427392B1 - Heat exchanger of boiler to compact and to increase heat efficiency by obtaining heating water and hot water through combustion heat of burner - Google Patents

Abstract

PURPOSE: A heat exchanger is provided to reduce a heating time of hot water and to minimize the energy consumption by heating the hot water through the combustion heat of a burner. CONSTITUTION: A heat exchange unit(300) comprises an upper plate, a partition, dividing plates(303) and a flue. The partition divides a space to hot water heat exchange chambers under the upper plate. The dividing plates are layered between the partition and the lower plate to have a space passing through hot water and heating water by punching through holes differently. The flue exchanges heat between the heating water and the hot water by penetrating the dividing plates, the upper plate, the partition and the lower plate and passing combustion heat of a burner(200). Thereby, the heating time and the consumed fuel are saved by directly heating the hot water and the heating water through the combustion heat of the burner.

Description

Heat exchanger of boiler

The present invention relates to a heat exchanger of a boiler, and more particularly, to obtain heating water and hot water by using combustion heat of a burner, and thus, the boiler can be compacted and the thermal efficiency can be increased.

A boiler using general gas and oil as a fuel heats the heat exchanger with the combustion heat of the burner so that the first heat exchange is performed, and circulates mainly with the heating water, and selectively heats the hot water by performing secondary heat exchange with external direct water. It is configured to be obtained.

Conventional heat exchangers used in such boilers are generally applied to low temperature heat exchangers in which heating water is heated by direct heat of a burner and hot water is indirectly heated by heat exchange with heating water.

Conventionally, the low-heat type heat exchanger structure is an uneconomical method in which hot water is indirectly heated by heating water heated by combustion heat of a burner, and a large amount of time and fuel consumption are required to obtain hot water.

In addition, there is a drawback that the minimum unit size of the device for achieving heat exchange is very large, which causes many obstacles in slimming the boiler as a whole.

In addition, the structure is very complicated, which causes a decrease in productivity and unnecessary cost increase in the process line.

In addition, due to the increase in weight according to the overall size of the boiler, a lot of inconveniences during transportation and transport has been caused.

It is an object of the present invention to provide a heat exchanger for a boiler in which the hot water is directly heated by the combustion heat of the burner to shorten its heating time and minimize energy consumption.

Another object of the present invention is to provide a heat exchanger for a boiler that can contribute to the overall slim (SLIM) of a boiler by simplifying the configuration of a device for heat exchange.

Still another object of the present invention is to provide a heat exchanger for a boiler, which is economically beneficial to a consumer by reducing manufacturing costs in a process.

1 is an overall device diagram of the present invention

Figure 2 is an enlarged cross-sectional view of the heat exchanger of the present invention

Figure 3 is a perspective view showing the bottom of the heat exchanger

Figure 4 is a partially cutaway cross-sectional view showing the piping state of the heat exchange unit.

5 is an exploded perspective view showing the connection structure of the split pin

Figure 6 is an understanding showing the process of welding by placing the material between the split pins

Figure 7 is an enlarged cross-sectional view showing a state in which the melting of the material by the heating furnace welded the split pins.

Explanation of symbols for main parts in the drawings

100-Boiler Body 200-Burner

300-Heat Exchanger 310-Heating Water Heat Exchange Room

320-Hot Water Heat Exchange Room 330-Year

340-Preheated Heating 350-Buffles

400-Ash

The object of the present invention, the combustion chamber 110 is provided on the lower side and the boiler body 100 is installed therein;

A burner 200 configured to discharge thermal energy by burning fuel supplied and installed in the combustion chamber 110;

In the heat exchanger 300 for selectively supplying the heating water and hot water by heating the direct water by the heat of combustion of the burner 200,

The heat exchange part 300 includes a top plate 301, a diaphragm 304 dividing a space to have a heating water heat exchange chamber 320 at a predetermined interval below the upper plate 301, the diaphragm 304, and A plurality of stacking arrangements are arranged at predetermined intervals to have the heating water heat exchange chamber 320 between the lower plates 302 so that the through holes 303a and 303b are drilled at different positions, so that the hot water and the heating water cross each other. Through the partition plates 303, the partition plates 303, the upper plate 301, the diaphragm 304, and the lower plate 302 so that the combustion heat of the burner 200 passes and exchanges heat with the heating water and hot water. It is achieved by being composed of a year (330).

Therefore, by directly heating the direct water with the combustion heat of the burner 200, it is possible to save time and energy required to obtain hot water and heating water.

In addition, the heat efficiency is increased by alternately circulating the heating water and the hot water into the heat exchange unit 300, so that the overall apparatus can be compact and slim by minimizing the unit size.

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

In FIG. 1, the boiler of the present invention is shown as a whole apparatus diagram, and FIG. 2 is an enlarged configuration of the heat exchanger 300 so that the diaphragm 304 and the plurality of partition plates 303 are disposed between the upper plate 301 and the lower plate 302. Of the flue 330 through which the heat of combustion of the burner 200 passes to heat the heating water heat exchange chamber 320 and the hot water heat exchange chamber 310, and the heating water heat exchange chamber 320 and the hot water heat exchange chamber 310. The composition is showing.

The boiler body 100 is a structure that wraps various structures installed therein, as will be described later, and a combustion chamber 110 in which a burner 200 is burned therein is installed at a lower side thereof.

The combustion chamber 110 is to prevent the heat of combustion emitted from the burner 200 to flow out to the outside as will be described later.

The boiler body 100 is formed in a generally rectangular or cylindrical shape, etc., the upper side is provided with an exhaust port 120 for discharging the combustion gas to the outside as shown in Figure 1 of the accompanying drawings.

The exhaust port 120 is a discharge passage for discharging the combustion gas discharged from the burner 200 to the outside of the boiler body 100 as described below, and at the lower side thereof, a silencer for reducing the discharge noise of the combustion gas ( 121) is installed.

The burner 200 is located at the lower side of the heat exchanger 300 as shown in FIG. 1 and mixes the fuel supplied from a separate fuel tank with air at an appropriate ratio, and burns it to release heat energy. In this case, the fuel supplied at this time may use oil such as petroleum or kerosene, or may include gas.

The most important structural feature in the present invention, by simplifying the overall structure of the heat exchange unit 300, the size of the boiler body 100 is reduced to the whole, and hot water is obtained by the indirect heat of the burner 200 This saves fuel consumption and shortens the time.

It will be described in detail by the accompanying drawings as follows.

That is, the heat exchange part 300 is partitioned by a heat exchange unit consisting of a diaphragm 304 to a unit partition plate 303 of the heating water heat exchange chamber 320 and the hot water heat exchange chamber 310 as shown in FIG. The incoming direct water is heat-exchanged by heat passing through the flue 330 to obtain heating water and hot water.

The hot water heat exchange chamber 310 is formed between the diaphragm 304 and the lower plate 302, respectively, above and below the heat exchange unit of the partition plates 303, as shown in FIG. 1, so that the combustion heat of the burner 200 is flue 330. It is set to heat hot water directly when discharged through). The hot water heat exchange chamber 310 is provided on each of the upper and lower sides with the partition plate 303 therebetween, receiving direct water through the direct inflow pipe 311 connected to one side (lower side in the drawing), the year 330 After heating to obtain hot water, it is discharged through the hot water supply pipe 312 connected to the hot water heat exchange chamber 310 of the upper side.

The heating water heat exchange chamber 320 is the heating water circulated through the heating pipe (not shown) connected to the floor of the building is returned to the water tank (H), and then between the partition plate 303 by a pump (P). It is piped so as to circulate through the heating water heat exchange chamber 310, and the discharge of the heating water heated by the heat exchange is set to be discharged to the heating pipe through the heating water supply pipe 323.

On the other hand, it is more effective if the heating water is returned to the heating water heat exchange chamber 320 and supplied through the return pipe 322 to be heated after passing through the inside of the combustion chamber 110 to be primarily supplied. That is, since the temperature of the returned heating water is relatively low, a lot of fuel is consumed in order to heat it again to a predetermined temperature. Therefore, the heating preliminary heating chamber 340 is formed around the combustion chamber 110 maintaining the state heated by the burner 200, and after passing through the heating preliminary heating chamber 340, the heating water heat exchange chamber By installing it so as to be drawn into the 320, it is naturally supplied to the heating water heat exchange chamber 320 after the primary heating, thereby reducing the time required for the heating and saving energy required.

In the drawings, one heating preliminary heating chamber 340 is provided. However, the present invention is not limited thereto, and the number may be increased by increasing the number as necessary.

On the other hand, the heating of the heating water heat exchange chamber 320 not only forms a direct heat exchange with the combustion heat of the burner 200 passing through the flue 330, as described later, in particular, directly above the hot water heat exchange chamber 310 The heating time is reduced as a whole by forming a natural heat exchange with the heating water heated by the direct heat of the burner 200. Therefore, while the time required for the heating is significantly shortened, there is an advantage that the amount of hot water is rich.

The hot water heat exchange chamber 310 is supplied with direct water through the external direct inflow pipe 311 as shown in the accompanying drawings, and heated to obtain hot water, and then discharged through the hot water supply pipe 312.

The flue 330 is a discharge cylinder of the combustion gas discharged from the burner 200, and is formed to vertically penetrate a plurality of vertically through the heating water heat exchange chamber 320 and the hot water heat exchange chamber 310. have. Therefore, the hot combustion gas passing through the flue 330 directly heats the heating water heat exchange chamber 320 and the hot water heat exchange chamber 310, respectively, thereby heating the hot water and the heating water by heat exchange.

On the other hand, the flue 330 is to obtain a more improved heat exchange efficiency by increasing the number as needed.

In addition, it is preferable to provide a baffle 350 provided with a plurality of exhaust resistance plates 351 for delaying the discharge speed of the combustion gas in the flue 330. That is, the flue 330 is formed vertically, the combustion gas discharged from the burner 220 is discharged at a relatively high speed. Therefore, by reducing the speed with the exhaust resistance plate 351, the heat exchange time is increased to increase the efficiency.

In addition, in the case where the heating water heat exchange chamber 320 and the hot water heat exchange chamber 310 are installed in a plurality of layers, the heating water heat exchange chamber 320 layers may be connected to these layers to increase heat exchange efficiency. In addition, the hot water heat exchange chamber (310) layer is effective to increase the heat exchange efficiency by connecting in series with these layers.

In the case where the heating water heat exchange chamber 320 and the hot water heat exchange chamber 310 are formed in plural layers, the contact portion of each layer is welded in a process to prevent leakage of the heating water and hot water. Is sealed with.

The dividing plate 303 is arranged between the diaphragm 304 and the lower plate 302 so that the heated water and the external direct water pass through different layers and the heat exchange is sequentially performed. Passing holes 303a and 303b are drilled as shown in FIG. 5 so that the water can be passed at different positions.

At this time, as a means for circulating the water to the diaphragm, the protruding frenzy surface is protruded and repeatedly installed in close contact with the passage holes 303a and 303b of the partition plate 303 located next to the heated water and direct water. The passing layers of can be formed differently.

In addition, the bead groove 305 is repeatedly formed to serve to evenly spread the water introduced into the passage layer as a whole, and to reinforce the strength of the partition plate 303.

Meanwhile, in the present invention, the partition plates 303 and the upper plate 301, the lower plate 302, and the diaphragm 304 are welded to the contact surfaces with the material 400 to be bonded to each other in a state of maintaining airtightness. Molding.

Therefore, it is possible to prevent the coupling part from being damaged by high temperature and high pressure, and the rubber packing is not installed, so that the thickness of the joint becomes thin and the heat transfer area per one partition plate is reduced in size.

As the material 400, a copper material is suitable among materials having good fluidity, higher melting temperature than the maximum allowed heating temperature, and excellent bonding strength.

In addition, the copper material 400 has a high thermal conductivity and forms a thin film, there is no fear of corrosion inside, there is an advantage that can maintain the mechanical strength continuously.

First, hot water in the hot water heat exchange chamber 310 may be directly connected to the uppermost space between the divider plates 303 without passing through the heating water heat exchange chamber 320 between the diaphragm 304 and the uppermost partition plate 303. The tubular spacer 306 is installed so as to be provided.

In addition, a spacer 307 is also provided between the lowermost partition plate 303 and the lower plate 302 so that the return water is directly passed between the partition plates 303 without passing through the hot water heat exchange chamber 310 through the return pipe 322. After passing through, the passage is formed to be supplied to the heating water heat exchange chamber 320 on the uppermost side again.

Then, after placing the material 400 which is not yet molten between the parts where the parts require welding and the partition plates 303, the upper and lower parts are pressed by a jig (not shown) to a predetermined pressure. In a supported state, it is put in a melting furnace and heated.

This melting furnace melts the melt 400, and its heating temperature is lower than the melting point of the upper and lower plates 301 and 302, the partition plates 303 and the diaphragm 304, and the melting point of the melt 400. It will be heated to a high temperature, since the copper material is used as the material 400, the temperature will be above the copper melting point.

In this heating step, as shown in FIG. 6, the molten metal 400 formed into a plate is melted and collected at the contact portion, which is caused by the phenomenon of maintaining the surface to a minimum by the surface tension of the liquid. ) Are gathered at the contact position.

In addition, at this time, the gap between the contact portion is very small, the penetration of the material in the phenomenon of capillary phenomenon and by fully covering the outer portion of the partition plate 303 and the upper and lower plates 301, 302 and diaphragm (base plate) in a more complete state 304 will be bonded to each other.

The top of the bead groove 305 protruded to the partition plate 303 is welded to the next partition plate 303 so that the gap is not allowed, resulting in a thinner joint and a larger heat transfer area per unit. You lose.

Therefore, the introduced water is greatly increased in the heat exchange area as a result of passing through every corner of the water along the direction of the bead groove 305.

The bead groove 305 is a bead groove of the next divider plate 303 in a state in which a plurality of repetitions are formed in a diagonal diagonal direction from the divider plates 303 which become a quadrangle as illustrated in FIGS. 5 and 6. By intersecting with (305), the contact area and time can be greatly increased as a result of the upper and lower passage layers having the movement passages in opposite directions.

On the other hand, when the molten material is melted and gathered into the contact portion, a fine molten melt film is formed on the surface of the partition plates 303, the upper and lower plates 301, 302, and the diaphragm 304, which are the base materials. Corrosion resistance of copper (400) prevents the surface from being corroded, thereby having an effect of greatly increasing durability.

In addition, in order to protect the heat exchange part 300, it is preferable to protrude and form several embossing protrusions 308 on the lowermost plate 302.

Therefore, when a lot of heat is generated by burning fuel in the burner 200, the lower plate 302 itself may not be greatly deformed, and its permissible internal pressure may be increased.

In addition, the heat transfer area of the lower plate 302 is increased, so that the heat of combustion of the burner 200 can be more efficiently transmitted.

According to the configuration of the present invention as described above, by directly heating the hot water and heating water by the combustion heat of the burner 200, it is possible to significantly reduce the heating time and save the fuel required.

In addition, it is a very useful invention such that the overall size of the device can be made slim and compact by minimizing the unit size.

Claims (10)

A boiler body 100 having a combustion chamber 110 at a lower side thereof and having respective structures installed therein; A burner 200 configured to discharge thermal energy by burning fuel supplied and installed in the combustion chamber 110; In the heat exchanger 300 for selectively supplying the heating water and hot water by heating the direct water by the heat of combustion of the burner 200, The heat exchange part 300 includes a top plate 301, a diaphragm 304 dividing a space to have a heating water heat exchange chamber 320 at a predetermined interval below the upper plate 301, the diaphragm 304, and A plurality of stacking arrangements are arranged at predetermined intervals so as to have the heating water heat exchange chamber 320 up and down between the lower plates 302 so that the through holes 303a and 303b are drilled at different positions, respectively, and the hot water and the heating water cross each other. The heat of combustion of the burner 200 passes through the partition plates 303, the partition plates 303, the upper plates 301, the diaphragms 304, and the lower plates 302. Heat exchanger of the boiler, characterized in that consisting of the flue 330 to heat exchange. The heat exchanger of claim 1, wherein the flue 330 is provided in plural. The heat exchanger of claim 1, wherein the heating water heat exchange chamber (320) and the hot water heat exchange chamber (310) are stacked in plural. The heating water preliminary heating chamber 340 is provided in the heating water heat exchange chamber 320, the heating water is passed around the combustion chamber 110 to be heated by passing through the interior of the combustion chamber 110. Heat exchanger for the boiler, characterized in that. The heat exchanger according to claim 1, wherein the flue (330) is provided with a baffle (350) provided with a plurality of exhaust resistance plates (351) for reducing a discharge rate of combustion gas. The heat exchanger of claim 1, wherein the lower plate (302) protrudes a plurality of embossing protrusions (308). The heat exchanger according to claim 1, wherein bead grooves (305) are formed in diagonal lines in the dividing plates (303). The method of claim 1, wherein the spacers 306 and 307 having passages therein are respectively installed between the upper plate 301 and the diaphragm 304 and between the lowermost partition plate 303 and the lower plate 302, respectively. Heat exchanger for boiler. The heat exchanger according to claim 1, wherein the upper and lower plates (301) and the contact portions of the partition plates (303) and the diaphragms (304) are welded and joined by a material (400). 10. The auxiliary heat exchanger of claim 9, wherein the material (400) is copper.

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