KR950000044Y1 - Heat exchange boiler - Google Patents

Abstract

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Description

Convection Accelerator for Indirect Heat Exchanger Boiler

1 is a longitudinal sectional view of the present invention.

2 is a cross-sectional view taken along the line II-II of FIG.

* Explanation of symbols for main parts of the drawings

1: boiler body 2: combustion chamber

3: water chamber 4: heat exchanger

5: sealed flange 6: cold water injection pipe

7: hot water outlet 8: open flange

9,9 ': associative 10: derivative

11: heat absorption pipe 12: upper collecting pipe

13: lower piping 14: superheater

15 injection hole 16 injection pipe

17 pump 18 connector

18 ': suction pipe A: heating portion

The present invention relates to an indirect heating type heat exchange boiler, in particular, a part of the primary heating water heated by the combustion gas through the pipe is vaporized and injected into the heat exchanger to promote heat exchange, thereby improving the thermal efficiency. The present invention relates to a heated heat exchange boiler.

The direct heating boilers, which are conventionally used in places such as baths and lodgings, are designed to directly heat the water supplied to the boiler and supply it to each of the users. Therefore, calcium carbonate (CaCO ₃ ) or magnesium (Mg) contained in the supplied water is supplied. ) And dissolved corals (O ₂ ) are made to scale and attached to the inside of the boiler body and the outside of the heat pipe or inside the pipe, and the effective diameter of the pipe is gradually narrowed, and the circulation of the hot water is not made smoothly. Corrosion of the pipes is accelerated, and the life of the boiler is shortened, and the circulation of the water is not smoothly performed, so that local overheating occurs and the thermal efficiency of the boiler is relatively low.

In order to improve these shortcomings, indirect heating boilers have been proposed to increase thermal efficiency and prevent corrosion of heat transfer pipes.Burner flames and combustion gases are fixedly filled in the tank by installing a heat exchanger in the tank of the boiler body. The primary heated water, which is directly heated by the heat of heat exchanges with the secondary heated water flowing in the heat exchanger, so that the secondary heated water is heated in a so-called hot water bath.

Therefore, in such an indirect heating type heat exchange boiler, the first heating water to be heated is not written directly, but the secondary heating water for hot water supply is indirectly heated while circulating in a convection phenomenon while maintaining a constant amount in the tank in the boiler body. Since the content of calcium carbonate, magnesium, and the like in the difference heating water is limited to a certain amount, only a very small amount of scale is generated, and corrosion or internal stenosis of the heat transfer tube due to scale generation can be effectively prevented.

On the other hand, even in the case of indirect heating, even in the boiler, the primary heating water directly heated in the boiler body is properly circulated in the boiler body in convection to exchange heat to the secondary heating water for hot water flowing through the heat exchanger. There is a limit, in order to solve the problem, for example, as in Utility Model Publication No. 81-60, the heating water of the boiler body is guided and moved to the convection guide plate to facilitate the convection action, but such a boiler is manufactured structurally. In addition to this drawback and costly drawback, there was a drawback of lengthening the piping because the inlet and outlet of the water supply line to the heat exchanger were installed on only one side when installing the boiler.

In addition, even if the convection guide membrane is installed so that the primary heated water is circulated, the primary heated water for heating the secondary heated water is not guided completely to the heat exchanger, but is stagnated toward the heating unit, thereby preventing circulation smoothly. Part of the low-temperature primary heated water cooled by heat exchange at the counter flows back toward the heat exchanger and is mixed with the hot heated water induced by the heating. Thus, the heat exchanger heat-exchanging the primary heated water and the secondary heated water is heated at the heating unit. There was a drawback that the primary heating water at a temperature lower than that of the primary heating water was in contact, and the indirect heating water could not be sufficiently raised, resulting in a low thermal efficiency of the boiler.

In addition, an indirect heating type heat exchanger boiler has been proposed by the present applicant to Utility Model Registration Application No. 86-10105 to solve the above-mentioned shortcomings to some extent. A heating part composed of an upper and a lower connection pipe is disposed on the other side while being disposed eccentrically to one side of the combustion chamber, while a heat exchanger made of a tube bundle through which secondary heating water flows is disposed above the combustion chamber. The primary heated water heated at is raised by convective circulation to heat exchanger, then heat exchanged and cooled down to the rear of the combustion chamber. Contacting only the first heated water to the secondary heated water The heat exchange can be made more efficiently.

However, even in an indirect heating boiler in which the combustion chamber is ubiquitous, there is a significant temperature deviation between the temperature of the primary heating water heated in the heating section and the secondary heating water indirectly heated by the primary heating water. One is a heat exchanger in which the heat exchanged between the secondary heated water and the primary heated water consists of a tube bundle consisting of a plurality of tubes, whereby the primary heated water is resisted to pass through the heat exchanger, thereby slowing the convective circulation of the heated water. This is because the heat exchange efficiency of the heat exchanger of the primary heated water that is heated and heated in the heating section is decreased.

In addition, since the secondary heated water is heated to the required temperature only after the entire primary heated water in the heating unit in the boiler body is heated to a high temperature, there is a drawback that the response rate of the secondary heated water rises slowly.

Therefore, the present invention was devised to solve the above-mentioned shortcomings, and the temperature rise response speed of the secondary heated water is increased, as well as the primary heated water absorbs the latent heat of the combustion gas as much as possible, thereby exchanging heat with the secondary heated water. It is an object of the present invention to provide a heat exchange boiler equipped with a convection accelerator to improve the thermal efficiency of the boiler.

The present invention for achieving the above object is, while the combustion chamber is placed in one of the lower chamber of the boiler body, the heat exchanger is installed on the upper part of the combustion chamber, while the other side in the upper chamber and the lower tube connected to each other to form an associated heat. In the indirect heating type heat exchanger boiler in which the heating part which consists of an association is arrange | positioned and the front end of this heating part is provided with the induction chamber which guides the combustion gas which passed through the said lower connection to the upper connection, The upper and lower connection in the said induction chamber A superheater composed of a plurality of heat absorbing pipes arranged to pass through the associated heat streams and upper and lower portions of the derivative chamber to communicate with both ends of the heat absorbing pipes, respectively; While being in communication with the upper collecting tube and arranged in parallel to the heat exchanger in the longitudinal direction It is characterized in that the convection promoting device is composed of a plurality of injection pipes having a plurality of injection holes, and a pump installed through the connection pipe and the suction pipe between the lower pipe and the lower part of the water chamber.

According to the present invention configured as described above, the primary heated water filled in the water chamber inside the boiler fuselage is heated in the heating unit and rises by convection, and then heats up to the heat exchanger through which the secondary heated water flows. The heater is lowered to the side opposite to the position where the heater is located and returned to the bottom of the heater. The portion of the primary heated water returned to the heater is sucked by the pump and injected into the heat absorption tube to pass through the derivative chamber of the combustion gas. The hot water is superheated to be almost vaporized by the combustion gas, and the steam is injected at high speed from the injection hole of the injection tube to the heat exchanger through the upper collecting pipe connected to the heat absorption pipe, thereby exchanging heat by the vaporized hot water. Secondary heated water passing through the cabin is heated to a higher temperature, and at high speed in the injection pipe The flow of the injected steam is heated in the heating portion to promote the convection flow of the primary heated water rising, so that the secondary heated water is heated faster and the heat exchange effect is increased.

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

1 is a longitudinal cross-sectional view of the boiler to which the present invention is applied, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, in which the combustion chamber 2 is eccentrically installed inside the boiler body 1, and in the upper portion of the combustion chamber 2; A heat exchanger (4) consisting of a bundle of tubes along the longitudinal direction of the body (1) is arranged, with a closed flange (5) at the rear end of the heat exchanger (4) and a supply order at the other front end. An open flange 8 having an inlet pipe 6 and a hot water discharge pipe 7 is provided, respectively, while the combustion chamber 2 and the combustion chamber (2) are opposite to the combustion chamber 2 in the water chamber 3 of the combustion chamber 2. The heating part A which heats a part of primary heated water in the water chamber 3 is arrange | positioned while the exhaust gas discharged by combustion exhaust in 2) passes.

Here, the heating portion (A) is configured such that the upper and lower pipes (9, 9 ') is arranged in the lower position opposite to the position of the heat exchanger (4) and the water chamber (3), the lower pipe (9) ') Is provided with a derivative chamber 10 for guiding the exhaust gas from the upper tube (9), while the upper tube (12), the lower tube (9) in front of the uppermost column formed by the upper tube (9) ') Is formed in the lower row of the lower row in front of the lower portion (13), respectively.

Here, the upper collecting pipe 12 and the lower pipe 13 are connected by a plurality of heat absorbing pipes 11 having a corrugated shape passing between the associated columns formed by the upper and lower pipes 9 and 9 '. While forming the superheater 14, the upper collecting tube 12 is a heat exchange between the heating unit (A) for heating the primary heating water to a high temperature combustion gas and the heat exchanger (4) where the primary heating water and the secondary heating water heat exchange. The lower part pipe 13 is connected to the lower part of the water chamber 3 and the suction pipe 18 'while being connected to the injection pipe 16 having a plurality of injection holes 15 arranged in parallel with the machine 4 at a predetermined interval. It communicates with the pump 17 and the connection pipe 18.

Next will be described the operation of the present invention configured as described above.

When the burner (19) is ignited, the heat and combustion gas flow along the combustion chamber (2), and the primary heating water, which is filled in the water chamber (3), is first heated slightly and then flows into the lower pipe (9 '). While heating the furnace secondly, and the combustion gas passing through the lower tube (9 ') is introduced into the upper tube (9) through the inductor chamber (10) while heating the primary heated water in the third and out through the flue (20) Discharged. Therefore, the primary heated water on the heating portion A side in which the plumbing 9, 9 'in the water chamber 3 is disposed is heated to a higher temperature more quickly, so that the density is lowered, and the lifting force is maintained. The primary heated water heated to high temperature in (A) continues to circulate in the direction of the arrow in FIG. 2 by convection, and the secondary hot water circulates while passing through the heat exchanger (4). Heat is heated by heating the hot water.

On the other hand, when the pump 17 connected to the lower part of the combustion chamber 2 through the water chamber 3 and the suction pipe 18 'is operated, a part of the primary heated water in the lower part of the water chamber 3 is connected to the derivative chamber through the connection pipe 18. Enter the lower part pipe (13) installed in (10), and then connected between the lower part pipe (13) and the upper collecting pipe (12) in parallel, between the associated row formed by the upper and lower pipe (9, 9 ') While passing through the plurality of heat absorbing pipe (11) in order to pass through, the superheated in the vapor state by the exhaust gas of about 500 ~ 600 ℃ flowing through the lower tube (9 ') and upper tube (9) do.

That is, since the flow rate of the primary heated water flowing through the heat absorption pipe 11 is small and the temperature of the exhaust gas passing through the inductor chamber 10 is high, the upper portion is passed through the heat absorption pipe 11 from the lower pipe 13. During the ascent to the collecting tube 12, the superheated water is expanded to become a vapor state and the expansion pressure is added to the pressure pumped to the pump 17. The superheated superheated water is connected to the upper collecting tube 12 to form a heat exchanger ( It enters into the injection pipe 16 arranged side by side with 4), and is injected at high speed toward the heat exchanger 4 from the injection hole 15 formed in this injection pipe 16.

The superheater overheated by the superheater 14 installed in the derivative chamber 10 is sprayed toward the heat exchanger 4 through the injection hole 15 of the injection tube 16, thereby accelerating the convection circulation of the primary heated water. Of course, the superheated water is mixed with the primary heated water that is heated in the heating unit A to further increase the temperature of the primary heated water, thereby increasing the temperature of the secondary heated water that is heat-exchanged in the heat exchanger 4. .

Here, the superheated water generation in the superheater 14 is the temperature of the exhaust gas passing through the derivative chamber 10 even if the boiler is initially ignited, that is, the primary heated water in the water chamber 3 is not yet fully heated. Is a high temperature of 500 to 600 ° C., so that the heat absorption tube 11 of the superheater 14 having a large diameter is overheated to reach a vapor state, whereby the heat exchanger 4 is discharged from the injection hole 15 of the injection tube 16. Hot superheated water is injected into the steam state to accelerate the circulation of the secondary heated water heated by the heat exchange in the heat exchanger (4) to make the heating time of the primary heated water faster, and the superheated water is mixed with the primary heated water. Therefore, the temperature of the primary heated water can be heated faster.

On the other hand, after passing through the heat exchanger 4, the first and second superheated water and the superheated water (the superheated water is mixed with the primary heated water and become the same state) after passing through the heat exchanger, The temperature rapidly decreases to increase the density, thereby enclosing the combustion chamber 2 opposite to the heating portion A side in the water chamber 3 toward the rear side and descending at a relatively high speed to enter the heating portion A below the heating portion (A). The circulation operation in which the heating in A) and the overheating of the superheater 14 is performed is repeated.

According to the indirect heating type heat exchange boiler provided with the convection promotion device of the present invention as described above, the heat exchanger 4 is located on the combustion chamber 2 upper part which is unevenly located in the water chamber 3 inside the boiler body 1, Positioned so that the heating portion (A) is located in the position and the other position, respectively, the upper collecting pipe 12 and the lower pipe 13, the heat absorption pipe 11 and the pump 17 in the combustion gas derivative chamber 10 Since the superheater 14 is formed in a structure such that a portion of the primary heating water is connected to the Daum upper collecting tube 12 superheated in the steam state in the superheater 14 and adjacent to the heat exchanger 4. The high-speed injection toward the heat exchanger 4 through the injection holes 15 of the injection pipes 16 arranged side by side, thereby increasing the temperature of the primary heated water passing through the heat exchange paper 4 and promoting convection. So that heat exchange in the heat exchanger (4) is more effective. High, this happens to be the faster the heat exchange by being be able to not only be possible to reduce the size of the heat exchanger (4) an increase in thermal efficiency to be speed up the heat exchange.

Claims (1)

While the combustion chamber 2 is unilaterally arranged in the water chamber 3 of the boiler body 1, the heat exchanger 4 is arranged above the combustion chamber 2, while the associated heat is arranged on the other side of the water chamber 3. A heating part A consisting of upper and lower connection pipes 9 and 9 'is formed, and a combustion gas having passed through the lower connection pipe 9' is disposed at the front part of the heating part A. In an indirect heating type heat exchange boiler comprising a derivative chamber (10) for directing a plurality of rows, a plurality of rows are installed so as to pass sequentially between the associated columns formed by the upper and lower pipes (9, 9 ') in the derivative chamber (10). Superheater consisting of an upper collecting tube 12 and a lower partial pipe 13 installed at the upper and lower portions of the absorption tube 11 and the derivative chamber 10 so as to communicate with both ends of the heat absorption tube 11, respectively. 14) and being in communication with the upper collecting tube 12 and arranged to be parallel to the heat exchanger 4 in the longitudinal direction. A pump provided with a spray pipe 16 having a number of spray holes 15 and a connecting pipe 18 and a suction pipe 18 'between the lower pipe 13 and the lower part of the water chamber 3; Convection promoting device of indirect heating type heat exchange boiler, characterized in that consisting of 17).