KR100812734B1 - Lumber fired steam boiler - Google Patents

Abstract

A lumber-fired steam boiler is provided to increase combustion efficiency by reusing waste heat and to be easily manufactured in a simple structure. A lumber-fired steam boiler includes a combustion chamber, a main body(4), a water pre-heating part(6), and an air pre-heating part(8). The main body includes fuel supply hole(424) and a steam chamber. Lumber as a fuel for the steam boiler is supplied through the fuel supply hole which is connected to the combustion chamber. The steam chamber surrounds the combustion chamber with water and is vertically connected to water pipes for high heat efficiency. High pressure and high temperature steam is transferred through steam exhaust pipes(406) to intended places. The water in the steam chamber is kept regular by a water supply control gauge(412). The combustion chamber heats the steam chamber by supplying the combustion chamber with oxygen through air nozzles in a vortex manner. Waste heat in the combustion chamber is collected through various types of pipes.

Description

Wood Fuel Steam Boiler {LUMBER FIRED STEAM BOILER}

1 is a front configuration diagram of the present invention.

2 is a cross-sectional configuration of the main body of the present invention.

3 is a plan sectional view of the water pipe of the present invention.

4 is a plan sectional view of an association of the present invention.

5 is a cross-sectional view of the water supply preheating unit of the present invention.

Figure 6 is a cross-sectional configuration of the air preheating unit of the present invention.

7 is a plan sectional view of the air jet port of the present invention.

8 is a partial cross-sectional configuration of the main body according to another embodiment of the present invention.

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

(2)-Wood fuel steam boilers (4)-Body parts

(6)-Water preheating unit (8)-Air preheating unit

(402)-combustion chamber (404)-steam chamber

(406)-Steam outlet (410)-Secondary water supply pipe

(412)-Water supply gauge (414)-Water pipe

(416)-Associated (418)-Air injection port

(440)-heat exchanger (442)-hot water tank

(602)-Primary water supply pipe (604)-Water preheating pipe

(612) (612a) (612b)-waste heat pipe (802)-waste heat separator

(804)-Air preheating pipes (808)-Fresh air input pipes

(810)-combustion gas discharge pipe (812)-air supply pipe

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam boiler, and more particularly, to a wood fuel steam boiler which burns wood fuel to generate and discharge steam at a high temperature and high pressure while the waste heat remaining during combustion is reused to increase combustion efficiency. It is about.

In general, a steam boiler burns fuel and transmits its heat of combustion to water to generate high temperature steam. The steam generated is used for industrial or agricultural purposes, and for general heating and hot water.

However, the conventional steam boiler composed of a combustion chamber and a steam chamber heated by the heat of combustion has a disadvantage in that the combustion efficiency is inferior to the combustion chamber capacity and the fuel cost, and thus cannot be widely used.

For example, in a public bath that requires a large amount of thermal energy, one steam boiler cannot produce all the steam required for heating, hot water and hot water, and a sauna. Since the installation must be used, the economic burden such as the equipment cost was very large.

Accordingly, an object of the present invention is to provide a wood fuel steam boiler that can obtain a high temperature and high pressure steam at a low cost in view of the above problems.

Another object of the present invention is to provide a wood fuel steam boiler that maximizes combustion efficiency by reusing waste heat during combustion several times.

Still another object of the present invention is to provide a wood fuel steam boiler which minimizes the amount of residues generated after combustion and combustion gas emissions such as carbon dioxide, nitrogen gas, monoxide gas, and sulfur oxides emitted to the atmosphere so that there is no risk of environmental pollution. have.

It is also an object of the present invention to provide a wood-fueled steam boiler capable of sufficiently extinguishing the role of a multi-purpose, versatile and large-capacity boiler even when using a single boiler, but reducing its maintenance cost.

Accordingly, the present invention, the main body portion consisting of a combustion chamber 402, which is provided with an association 416 for waste heat recovery, and a steam chamber 404 that is heated by the heat of combustion of the combustion chamber 402 to produce and discharge high-temperature, high-pressure steam ( 4) and the water supplied to the combustion chamber 402 and the water supplied to the steam chamber 404 while the waste heat recovered by the associated pipe 416 is transferred through the waste heat pipe 612 to the combustion gas discharge pipe 810. It characterized in that it is composed of a water supply preheating unit 6 and an air preheating unit 8 to warm each.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote components having the same function.

1 is a front configuration diagram of the present invention, FIG. 2 is a cross-sectional configuration diagram of the main body portion of the present invention, FIG. 3 is a plan sectional view of the water pipe of the present invention, and FIG. 4 is a plan sectional view of the association of the present invention.

The present invention is to produce and discharge the high-temperature and high-pressure steam using easy-to-use cheap wood fuel, large facilities that require a large amount of heat energy urgently or all at once, for example, heating for public baths, hot water, hot water, saunas and There is a gist of the present invention in that it is configured to be very efficient and economical for use in factories and the like.

The wood fuel steam boiler 2 of the present invention includes a main body 4 having a combustion chamber 402 and a steam chamber 404 and a water supply preheating unit 6 for supplying lukewarm water to the steam chamber 404. And an air preheating unit 8 for supplying lukewarm air to the combustion chamber 402.

As shown in FIGS. 1 and 2, the main body 4 of the wood fuel steam boiler 2 has a fuel inlet 424 for inserting wood on the outer surface of the main body 4, and the fuel inlet 424. The interior of is connected to the combustion chamber 402, consisting of a steam chamber 404 surrounding the combustion chamber 402 with water.

The steam chamber 404 is configured to horizontally connect a plurality of water pipes 414 penetrating the inside of the combustion chamber 402 to efficiently receive a lot of heat from the steam chamber 404, in the steam chamber 404 The generated high temperature and high pressure steam (S) is configured to be sent to each of the necessary place through the steam outlet 406.

At this time, when the amount of water in the steam chamber 404 is reduced due to the generation of steam (S) is measured by the water supply control gauge 412 installed outside the main body 4 and the water supply pump 614 connected to the water supply as necessary It is configured to automatically supply the water (W2) of the secondary water supply pipe (410). The amount of water in the steam chamber 404 is such that at least the combustion chamber 402 is completely covered.

In the combustion chamber 402 which heats the steam chamber 404, a plurality of air injection holes 418 that supply air, that is, oxygen required for combustion, are installed obliquely on the inner wall so as to be supplied in a whirlpool. In addition, the waste heat of the remaining combustion chamber 402 after supplying as much combustion heat as necessary to the steam chamber 404 allows radially mounting and recovering dozens of associations 416 on the inner wall of the combustion chamber 402, And it is configured to continuously transfer to the waste heat pipes (612, 612a, 612b) through the waste heat chamber (416a) lower steam chamber (404).

5 is a cross-sectional configuration diagram of the water supply preheating unit of the present invention, FIG. 6 is a cross-sectional configuration diagram of the air preheating unit of the present invention, and FIG. 7 is a plan cross-sectional view of the air injection port of the present invention.

The water W2 supplied to the steam chamber 404 of the main body 4 is water warmed lukewarm by waste heat in the water supply preheating unit 6, and the water supply preheating unit 6 is a device separate from the main body 4. And connected to the steam chamber 404. That is, the water supply preheating unit 6 is a water supply preheating tube 604 formed around a part of the waste heat pipe 612a, and the water W1 external to the water supply preheating tube 604 as shown in FIG. The primary water supply pipe 602 supplied by the) and the secondary water supply pipe 410 for sending the heated water (W2) in the water supply preheating pipe 604 to the steam chamber 404 is configured to connect.

In addition, the air HA supplied into the combustion chamber 402 is also air warmed to lukewarm by waste heat in the air preheating unit 8, and the air preheating unit 8 is waste heat installed at the transfer end of the waste heat pipe 612b. Air preheating tube 804 formed surrounding the side wall of the separation pipe 802, the waste heat separation pipe 802, and an external air input pipe for introducing external air into the air preheating pipe 804 by the operation of the ring blower 806. 808 and an air supply pipe 812 that warms the input air and sends it to the combustion chamber 402 are configured.

At this time, when the waste heat passing through the water supply preheating unit 6 is introduced into the waste heat separation tube 802 in the air preheating unit 8, the end portion of the waste heat separation tube 612 is disposed in a whirlwind force. Install at an angle to the Then, when the waste heat is turned into a waste heat separator tube 802 as if the waste heat is included in the waste heat separator tube 802, the waste residues fall into the residue separator 814 configured under the waste heat separator tube 802, and the remaining light The gases are configured to go out through the combustion gas discharge pipe 810 configured on the waste heat separation pipe 802. Therefore, the air preheating part 8 also serves as a pollution prevention device.

The feedwater preheating unit 6 and the air preheating unit 8 so that the waste heat can be transferred to the associating 416, waste heat chamber 416a, waste heat pipes 612, 612a, 612b, and air preheating pipes 804. The blowing fan 610 and the motor M are installed in between.

As described so far, the wood fuel steam boiler 2 of the present invention is the heat of combustion generated when wood is burned in the combustion chamber 402. The wood fuel steam boiler 2 primarily heats the water W2 of the steam chamber 404. The first water supplied to the water supply preheating pipe 604 (W1) is warmed, and the third air to warm the cold air introduced into the air preheating pipe 804. Then, the warmed water (W2) and air (HA) is introduced into the body portion 4 is used to maximize the combustion efficiency of the present invention.

In order to maximize combustion efficiency, the water pipe 414 of the steam chamber 404 and the structure of the plumbing 416 and the air supply pipe 812 in the combustion chamber 402 also play an important role.

As shown in FIGS. 2 and 3, the water pipe 414 is composed of a plurality of water pipes 414 having a two-layered structure in the upper and lower stages, and each layer is arranged in a horizontally tightly arranged tube to close the inside of the combustion chamber 402. It is formed to penetrate. The water pipe 414 can efficiently absorb the heat of combustion of the combustion chamber 402.

Association 416, as shown in FIG. 4, penetrates radially through the inner wall of combustion chamber 402 to form dozens of tubes, and connects to the waste heat chamber 416a below the steam chamber 404 as shown in FIG. 416 are formed to extend vertically downward and continue to be transported through the waste heat pipe 612.

In addition, as shown in FIGS. 7A and 7B, the air supply pipe 812 is radially installed on the inner wall of the combustion chamber 402 in a plurality of oblique manners, and is composed of several layers. It is configured to be supplied in a whirlwind in one direction. At this time, it is preferable to provide control valves 814 on the air supply pipes 812 exposed to the outside of the main body 4 so as to adjust the amount of air supplied to the air injection port 418. Further, the air pipe between the air injection port 418 and the air supply pipe 812 may be configured in the combustion chamber 402 as shown in FIG. 7A or in the steam chamber 402 as shown in FIG. 7B.

FIG. 8 is a partial cross-sectional view of the main body according to another embodiment of the present invention, which shows an additional hot water supply system to the wood fuel steam boiler 2 of the present invention.

The hot water supply facility, as shown in FIG. 8, is provided with a hot water tank 442 for hot water supply separately from the main body part 4, and a plurality of U-shaped pipes are formed so as to be immersed in the water in the steam chamber 404. The heat exchanger 440 is installed, and pipes are connected between the hot water tank 442 and the heat exchanger 440. In addition, the pump 448 is installed so that the water W3 supplied to the hot water tank 442 through the water supply pipe 444 from the outside to the heat exchanger 440, and the heat exchanger 440 in the steam chamber 404. ), The pipe 446 is installed so that the hot water is sent to the hot water tank 442 and air-fed as hot water (WH).

The operation of the wood fuel steam boiler 2 will now be described based on the configuration of the present invention.

When the wood fuel is injected into the combustion chamber 402 through the fuel inlet 424 of the main body 4 and fired, the combustion heat generated in the combustion chamber 402 heats the water in the steam chamber 404 to provide high temperature and high pressure steam. (S) is generated, and this steam is discharged through the steam discharge port 406 configured to be exposed to the outside of the main body 4.

Then, the water of the hot water tank 442 is heated while rotating in the heat exchanger 440 of the steam chamber 404 is supplied for the hot water supply through the water supply pipe 446.

Meanwhile, the waste heat in the combustion chamber 402 is recovered through the dozens of pipes 416 by the blower fan 610 operated by the power of the motor M, and the waste heat pipes 612 and 612a through the waste heat chamber 416a. To 612b.

During the transfer of the waste heat, the body portion along the secondary water supply pipe 410 while the cold water W1 supplied from the water supply preheating unit 6 to the water supply preheating pipe 604 to the primary water supply pipe 602 is warmed up. 4) It is supplied to the steam chamber 404 inside. When lukewarm water W2 is supplied to the steam chamber 404 through the secondary water supply pipe 410, the water supply control gauge 412 measures the amount of water in the steam chamber 404 so that the water is automatically supplied as it decreases. If necessary, the valve 814 of the externally exposed secondary water supply pipe 410 is manually adjusted.

In addition, the waste heat that has passed through the water supply preheating unit 6 is air to the air (HA) in which cold air, which has been lukewarmly warmed up through the air inlet pipe 808 by the operation of the ring blower 806 in the air preheating unit 8, is warmed. The gas is injected into the combustion chamber 402 in the main body 4 along the supply pipe 812 to the air injection port 418 to supply the combustion gas required to maximize the thermal power during the wood burning.

Finally, the waste heat introduced up to the air preheating unit 8 warms the outside air and at the same time the heavy residue falls to the lower residue separator 814 to be separated and discharged, and the remaining combustion gas is the upper combustion gas discharge pipe 810. Through the outside.

408 is the steam safety valve, 420 is the pressure gauge, 422 is the pressure breaker and 430 is the combustor outlet.

As described so far, the present invention is very economical because the fuel cost is very low, the waste heat is reused, the combustion efficiency is high, the structure is simple, the production is easy, and the residues and gases after combustion are separated and discharged, so there is no fear of environmental pollution. Has the effect of.

Claims (9)

delete delete Body part 4 which consists of the combustion chamber 402 in which the waste heat collection | collection 416 is installed, the steam chamber 404 heated by the heat of combustion of the combustion chamber 402, and produces | generates and discharges the high temperature high pressure steam, and the combustion chamber ( The waste heat recovered by the dozens of pipes 416 radially mounted on the inner wall is passed through the waste heat chamber 416a under the steam chamber 404 to the waste heat pipe 612 to exit the combustion gas discharge pipe 810. On the way, the water supply preheating unit 6 and the air preheating unit 8 are configured to heat the water supplied to the steam chamber 404 and the air supplied to the combustion chamber 402, respectively. A wood fuel steam boiler, which is formed integrally with the 404 but arranged in a multi-layer structure and arranged horizontally to penetrate the combustion chamber 402. The method of claim 3, wherein The steam chamber 404 is immersed in the heat exchanger 440, the hot water tank 442 is installed on the outside and connected between the heat exchanger 440 and the hot water tank 442 by pipes, hot water tank ( 442, the water supplied to the wood fuel steam boiler characterized in that it is heated while rotating in the heat exchanger (440). The method of claim 3, wherein The water supply preheating unit 6 includes a water supply preheating tube 604 formed by surrounding some waste heat pipes 612, a primary water supply pipe 602 supplied with water from the outside to the water supply preheating tube 604, and heated water. Wood fuel steam boiler, characterized in that for connecting the secondary water supply pipe 410 to send to the steam chamber (404). The method according to claim 3 or 5, The steam chamber 404 is to cover the combustion chamber 402 of the water completely, install a water supply control gauge 412 outside the body portion 4 so that the amount of water in the steam chamber 404 to maintain a certain level Wood fuel steam boiler, characterized in that configured to automatically control the water supply from the secondary water supply pipe (410). The method of claim 3, wherein The air preheating unit 8 includes a waste heat separation tube 802 installed at a transfer end of the waste heat tube 612, an air preheating tube 804 formed around the side wall of the waste heat separation tube 802, and an air preheating tube. Wood fuel steam boiler, characterized in that the external air input pipe 808 for introducing external air to the 804 and the air supply pipe 812 for warming the air and sending it to the combustion chamber 402. The method according to claim 3 or 7, The air warmed by the air preheating unit 8 is transferred to the air supply pipe 812 to be supplied to the combustion type 402 in a whirlwind type by a plurality of air injection holes 418 installed obliquely on the inner wall of the combustion chamber 402. Wood fuel steam boiler characterized in that the configuration. The method of claim 7, wherein An end of the waste heat pipe 612 is installed obliquely in the waste heat separation pipe 802 of the air preheating unit 8 so that waste heat is introduced into a whirlwind, and a residue separator 814 is disposed below the waste heat separation pipe 802. The wood fuel steam boiler, characterized in that for installing and installing the combustion gas discharge pipe 810 on the top.

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