KR20110092428A

KR20110092428A - Wood pellet boiler

Info

Publication number: KR20110092428A
Application number: KR1020100011842A
Authority: KR
Inventors: 정경수; 김철
Original assignee: 정경수; 김철
Priority date: 2010-02-09
Filing date: 2010-02-09
Publication date: 2011-08-18

Abstract

The present invention relates to a wood pellet boiler that obtains a heat source by burning wood pellets as a fuel, so that the heat exchange is performed while the hot combustion gas stays inside the main blister constituting the heat exchanger as much as possible. At the same time, even if the ash burned in the combustion chamber rises with the high-temperature combustion gas and sticks to the inside of the pipe, the ash stuck to the pipe can be easily removed to maximize the heat exchange efficiency.
To this end, the left and right blisters 32 and 33 are composed of a left blister 32, a right blister 33 and an upper blister 34 passing through each other so that the entire body 10 serves as a heat exchanger. The main blister 31 is installed in the upper portion of the combustion chamber 20 by passing through at least one or more connecting pipes 35, and the plurality of plumbing lines are zigzag at a predetermined angle inside the main blister 31. At the same time as installing the 40 and 40a, the inlet of the tube 40 and 40a formed adjacent to the outlet of the tube 40 and 40a is simultaneously wrapped with the guide plate 60, and the combustion gas is connected to the tube 40. Pass 40a in a zigzag and the upper portion of the main blister 31 is characterized in that by installing a flue 90 to pass through the center of the upper blister 34.

Description

Wood Pellet Boiler {omitted}

The present invention relates to a wood pellet boiler which obtains a heat source by burning wood pellets as a fuel and more specifically, the internal combustion of the main heat exchanger provided in the upper part of the combustion chamber allows for high temperature combustion gas. Wood pellets that stay and allow for heat exchange and at the same time burn the ashes burning in the combustion chamber together with the high-heat combustion gases and easily remove the ashes stuck to the pipes to maximize heat exchange efficiency. It's about a boiler.

In general, boilers are mainly used for supplying heating water and hot water in homes, offices, factories, and plastic houses. These boilers have high thermal efficiency and do not leave ash after combustion, which makes them easy to handle. Is widely used.

However, there are economic difficulties in using such oil boilers or gas boilers due to the increase in fuel costs such as oil and gas.In particular, the installation and operation of the oil boilers or gas boilers is a burden due to the increase in fuel costs in rural, mountainous, and walled areas. It was a difficult situation.

In addition, fossil fuels used in oil boilers and gas boilers are being used as an important cause of global environmental pollution, including air pollution, due to natural vapors from exhaust gases or oil storage tanks. .

Therefore, in recent years, a tendency to use a boiler using wood pellets (hereinafter referred to as "pellets") is increasing, mainly for general farms and factories used for home or small-scale business.

1 is a longitudinal cross-sectional view showing a conventional pellet boiler and FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1, wherein a conventional pellet boiler includes a boiler 100 having a combustion chamber and a heat exchanger in which pellets are burned, and the boiler It consists of a fuel supply unit 200 for supplying pellets to (100).

The boiler 100 includes a main body 110, a burner 121 installed in a combustion chamber, a blower 122 for blowing air to the burner, a water pipe type heat exchanger 123 and an associated heat exchanger as a heat exchanger. And a part 131 and a discharge part 140, and the inside of the main body 110 is divided into the first and second zones 120 and 130 by the partition wall 111 installed in the vertical direction. The upper cover 112 and the first and second side covers 113 and 114 are installed on the outside of the main body 110 so as to be openable and closed, so that the maintenance of the inside of the boiler 100 is facilitated.

At this time, the bottoms of the first and second zones 120 and 130 are provided with ash trays 124 and 133 for collecting ash generated in the process of burning the pellets, respectively.

A burner 121 for burning pellets is installed at a lower portion of the first zone 120, and through holes 121a and 121b are formed at side and bottom surfaces of the burner to supply air necessary for burning the pellets. The lower part is connected to the blower pipe 122 for supplying the wind generated by the blower 125.

The water pipe-type heat exchanger 123 installed in the upper portion of the burner 121 among the heat exchangers serves to warm the heating water by primary heat exchange with the hot combustion gas generated by the combustion of the pellets. It consists of a water pipe 123b through which fluid flows and a baffle plate 123a to which the water pipe 123b is fixed.

In addition, the associated heat exchanger 131 located in the second zone 130 is a place where secondary heat exchange is performed with the combustion gas that has completed the primary heat exchange in the water pipe heat exchanger 123. It consists of a plurality of pipes 131a through which combustion gas flows and a pipe 131b wound around the pipes 131a.

At this time, the one end is connected to the discharge unit 140 having the air blowing motor 141 and the other end is open, so that the heat exchange motor 141 drives the primary heat exchange. After the combustion gas is sucked through the inlet of the open tube (131a) is configured to be discharged to the outside through the discharge pipe 142 of the discharge unit 140.

Meanwhile, the fuel supply unit 200 for automatically supplying pellets to the boiler 100 includes a storage unit 210 in which pellets are stored, and a hopper 220 and pellets installed at a lower end of the storage unit 210 to discharge pellets. It consists of a conveying part 230 to convey.

The conveying unit 230 is a conveying pipe 231 installed inclined on the discharge side of the hopper 220, a conveying screw 232 installed in the conveying pipe 231 to convey pellets, and the conveying screw 232 ) And a feed port 234 installed inclined at the discharge side of the feed screw 232 to drop the pellets into the burner 121.

Therefore, when the pellets are filled in the storage unit 210 and the feed motor 233 is driven, the pellets are transferred by the feed screw 232 and supplied to the supply port 234, so that the pellets are accumulated in the burner 121.

When the pellets to be burned are supplied to the burner 121 as described above, when the blower 122 is operated while igniting the pellets, external air is supplied to the inside of the burner 121 through the air passages 121a and 121b. Combustion occurs, whereby a high-temperature combustion gas is generated to rise by the natural synergistic effect and the exhaust motor 141 of the discharge unit 140 installed in the second zone 130.

Therefore, the primary heat exchange is performed with the combustion gas raised in the water pipe-type heat exchanger 123 installed directly above the burner 121 to heat the heating return flowing along the water pipe 123b installed in the baffle plate 123a. do.

After that, the combustion gas which has undergone the first heat exchange is discharged through the connection 131a located in the second zone 130 via a space formed between the upper portion of the partition 111 and the upper surface of the main body 110. As it exits and is heated by heat exchange with water flowing through the pipe 131b wound on the outside of the pipe, the water can be used as hot water.

However, such a conventional pellet boiler is a heat exchanger, in which heat exchange is performed by hot combustion gas, into a tubular heat exchanger 123 installed horizontally on an upper portion of a combustion chamber, and an associated heat exchanger 131 surrounding an association. There are several problems, such as:

First, since the ashes burned by the wind of the blower 122 supplied for combustion of the pellets are scattered upward and accumulated on the baffle plate 123a of the water pipe-type heat exchanger 123, the heating return flowing through the water pipe 123b. It will significantly reduce the heat exchange efficiency with and.

Second, the water pipe 123b through which the heating return flows is arranged at a predetermined interval on the bottom surface of the baffle plate 123a constituting the water pipe-type heat exchanger 123, thereby reducing the heating efficiency because the amount of the heating return flowing through the water pipe is small. .

Third, ash stuck to the inner wall of the pipe 131a when the ashes raised by the air flow of the blower 125 adhere to the inner wall of the pipe in the process of being discharged along the pipe 131a to suppress the emission of exhaust gas. There is a limit to remove the stuck ash because the inner diameter of the tube is small.

Fourth, the associated heat exchanger 131 for heating the hot water while the combustion gas is discharged in the second zone 130 partitioned by the partition 111 is installed with a 180 ° phase difference from the combustion gas discharge direction of the combustion chamber. In order to discharge the combustion gas passing through the 131a, the discharge unit 140 having the motor 141 for forcibly discharging the combustion gas had to be installed. Therefore, the structure was complicated and the production cost was increased. And due to the discharge unit 140 occupy a lot of the installation area of the boiler.

The present invention has been made to solve such a conventional problem, by dramatically improving the structure of the heat exchanger provided in the main body heat of the hot combustion gas generated in the combustion chamber and the heating return filled inside the heat exchanger By delaying the exchange time as much as possible to maximize the thermal efficiency.

Another object of the present invention is to install the door to the front and rear of the main body to be opened and closed by the ash stuck to the joint by quickly removing even if the ash stuck to the inside of the joint in the process of ash discharged along the association with the combustion gas. It is to prevent the phenomenon of inferior thermal efficiency in advance.

Still another object of the present invention is to enable combustion gas to be discharged along the flue without using a separate motor.

According to an aspect of the present invention for achieving the above object, by burning the pellets by installing a burner in the combustion chamber provided in the interior of the main body, the hot combustion gas is heat exchanged with the heating return flowing through the interior of the heat exchanger In the heat exchanger of the pellet boiler, the front and rear doors are installed on the front and rear of the main body so as to be openable and closed, and the upper part of the combustion chamber provided in the main body is located inward from the connection surface of the front and rear doors to return the heating water. A box-type heat exchanger to be filled, and a plurality of pipes installed in a zigzag at a predetermined angle so that the inlet and the outlet inside the heat exchanger pass through the outside of the heat exchanger toward the front and rear doors, and the outside of the heat exchanger. Combustion gas zigzags through the plume at the same time by surrounding it with the exit of the plume Provided is a heat exchange apparatus for a wood pellet boiler, characterized in that it consists of a guide plate to guide.

The heat exchanger of the present invention has several advantages as compared to the conventional heat exchanger.

First, as the zigzag tube is arranged inside the heat exchanger filled with heating return, the heating return in the heat exchanger is heated in the process of discharging the high-temperature combustion gas through the pipe, which increases the heat efficiency due to the increase in the heat transfer area. It can be maximized.

Second, even if the ash builds up in the area where the plume breaks up due to the combustion gas, if the front and rear doors are opened and then the guide plate is removed, the plumbing will be completely open so that the ash stuck to the inside of the plumb can be easily removed quickly. Thus, the thermal conduction efficiency is maximized.

Third, the installation of a plate-shaped screw inside the pipe is delayed the time that the hot combustion gas passes through the pipe can increase the heat exchange efficiency.

Fourth, in the process of manufacturing the heat exchanger in the form of a box, the welding is fixed by zigzag welding a plurality of associations therein, thereby facilitating manufacture of the heat exchanger.

Fifth, the flue is installed vertically on the top of the heat exchanger so that the waste gas heat exchanged through the flue can be discharged through the flue without installing an outlet having a separate motor, so that the installation area of the boiler can be minimized, Installation is possible.

1 is a longitudinal sectional view of a pellet boiler equipped with a conventional heat exchanger
2 is a cross-sectional view taken along the line A-A of FIG.
3 is a perspective view showing the structure of the present invention
4 is a partially exploded perspective view of the present invention;
5 is a longitudinal cross-sectional view of FIG.
6 is a cross-sectional view taken along the line B-B of FIG.
Figure 7 is a longitudinal cross-sectional view showing another embodiment of the present invention

Hereinafter, with reference to Figures 3 to 6 showing an embodiment of the present invention in more detail as follows.

Figure 4 is a perspective view showing a partially exploded view of the structure of the present invention, Figure 5 is a longitudinal cross-sectional view of Figure 3 and Figure 6 is a cross-sectional view taken along line B-B of Figure 5, the present invention occurs as the pellet is burned in the combustion chamber 20 It is characterized in that the high temperature combustion gas is heat exchanged with the heating return to obtain a high temperature heating water is installed throughout the body 10 to obtain the maximum thermal efficiency.

The main body 10, which serves as a heat exchanger as a whole, consists of a left blister 32, a right blister 33, an upper blister 34, and a main blister 31, which are passed through each other, and the left and right blisters ( 32, 33 is provided in the lower portion of the left blister 32 or the right blister 33 through the inlet pipe 36 through which at least one connecting pipe 35 is introduced. The upper blister 34 is provided with a discharge pipe 37 for discharging the heated heating return water.

The reason for installing the heating return inlet pipe 36 in the left blister 32 and the right blister 33, respectively, is because the inflow direction of the heating return is different depending on the installation position of the pellet boiler any one of the two inlet pipe ( 36) to connect the conduit and to close the inlet pipe located on the opposite side.

Therefore, when the cold heating return water flows into the interior of the body 10 through the inlet pipe 36 is moved to the left blister 32 or the right blister 33 located on the opposite side through the connecting pipe 35 the main body 10 It is heated evenly by exchanging heat with hot combustion gas while moving the whole of.

On the other hand, the main blister 31 located in the upper portion of the combustion chamber 20 is provided with a plurality of associations 40, 40a in a zigzag form at a predetermined angle, and the associations 40, 40a have an inlet and an outlet. The appliance is open to the rear doors 11 and 12.

This means that the inlet and the outlet of the open tube 40 and 40a open even if they stick to the inner wall of the tube 40 and 40a in the course of ash passing together with the hot combustion gas through the tube 40 and 40a. It is intended to be able to quickly remove the ash stuck to the inner wall through.

The front and rear doors 11 and 12 which are installed to be opened and closed to the main body 10 are configured to be locked to the main body 10 by the locking lever 14 or open from the main body 10.

By installing a plurality of pipes 40 and 40a inside the main blister 31 to improve thermal efficiency by increasing the heat transfer area, even though hot combustion gas passes through the pipes 40 and 40a in a zigzag fashion. However, as shown in FIG. 7, in another embodiment, when a screw 50 made of a plate is installed inside the respective pipes 40 and 40a to delay the discharge of the combustion gas, hot combustion gas is associated with each other. 40) The time passing through 40a is delayed as much as possible, thereby increasing the heat exchange efficiency with the heating return in the main blister 31 is more preferable.

The diaphragm is formed so as to coincide with the connection surface 13 of the front and rear doors 11 and 12 at the upper and lower portions of the inlet and the outlet of the inlet 40 and 40a, which are opened before and after the main body 10. 41 and 42 are fixed, and when the bent portion 61 of the guide plate 60 is supported on the upper plate 41, the guide plate 60 is connected to the plate 42 positioned below the combustion gas. It is to constitute a closed circuit to move.

That is, the space 70 is formed by the guide plate 60 to allow the combustion gas to move upward, and when the guide plate 60 is removed from the diaphragms 41 and 42, the space 70 is associated with the space 70. Since the inlet and the outlet of the 40 and 40a are opened, the ash stuck to the inside of the tube 40 and 40a can be removed.

In addition, the flue 90 is installed in the upper blister 34 located above the main blister 31 so as to pass through the center, which passes through the main blister 31 and heat exchanged with the heating return as much as possible. In order to recover the waste heat from the upper blister 34 in the process of gas is discharged to the outside through the flue (90).

Hereinafter, the operation of the present invention will be described.

First, as shown in FIG. 6, when the cold heating return water flows into the body 10 through the inlet pipe 36 connected to the right blister 33, some of the introduced heating return water moves to the right blister 33. , Since some of them are moved to the left blister 32 side through the connecting pipe 35, the heating return is evenly circulated inside the main body 10.

As such, when the heating return water is filled inside the main body 10 serving as a heat exchanger, and combustion occurs in the burner 21 provided in the combustion chamber 20, the interior of the combustion chamber 20 is maintained at a high temperature. The heating return water filled in the left and right blisters 32 and 33 is heated.

At the same time, the hot combustion gas passes along the inlet of the tube 40 installed at the bottom of the main blister 31 in the direction of the arrow in FIG. 5 and heats the heating return located inside the main blister 31. Located in the interior of the space portion 70 formed in the guide plate 60 through the inlet to the inlet of the second position (40a) is to heat the heating return located in the interior of the main blister 31 again. , This process is repeated according to the number of the associated 40, 40a installed according to the height of the main blister 31 to heat the heating return located inside the main blister 31.

The heated heating water is cooled while circulating the heating pipe constituting the closed circuit and is heated, and is then introduced into the heat exchanger 30 to be heated again, and this process is repeatedly performed.

As the pellet burns in the burner 21 provided in the combustion chamber 20, the innate ash overflows and falls below the burner 21, which is placed on the connecting pipe 35 and then the ash through the gap between the connecting pipes. It is put in the receiving 80, at this time, the natural ash is also maintained a certain hot state to serve to heat the heating return.

On the other hand, the combustion gas heat exchanged with the heating return while passing through the main blister 31 is discharged to the outside through the flue (90) installed to be located in the center of the upper blister 34, in this case of the main blister 31 The flue 90 is located at the center of the upper blister 34 positioned at an upper portion thereof, so that waste heat of the combustion gas can be recovered.

When the wood pellet boiler of the present invention is used for a long time, the fine ash generated by the combustion of the pellets rises with the combustion gas due to the convection phenomenon and sticks to the inside of the pipes 40 and 40a zigzagly installed in the main blister 31. If this is left, the combustion gas is reduced heat exchange efficiency with the main blister 31, so the ash stuck to the associated 40, 40a must be periodically removed.

To this end, in one embodiment of the present invention, after releasing the lock lever 14 installed in the main body 10, the front and rear doors 11 and 12 are completely opened as shown in FIG. When the guide plate 60 is separated, the inlet and the outlet of the plumbing 40 and 40a are exposed to the outside through the space portion 70, thereby brushing the ash stuck to the inside of the plumbing 40 and 40a. Can be removed easily.

After the ashes inside the pipes 40 and 40a are removed cleanly by the above-described operation, the bent portion 61 of the bent portion 61 of the guide plate 60, which has been separated from the main body 10, is positioned at the top. Just put on the space 70 is closed so that the mounting of the guide plate 60 is completed.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiments are for the purpose of description and not of limitation.

In addition, it will be understood by those skilled in the art that various changes can be made within the scope of the technical idea of the present invention.

10: body 11: front door
12: rear door 31: main blister
32: left blister 33: right blister
34: upper blister 35: connector
40, 40a: associative 41, 42: diaphragm
60: guide plate 90: year

Claims

As the burner 21 is installed in the combustion chamber 20 provided in the main body 10 to burn the pellets, the heat of the wood pellet boiler in which the hot combustion gas exchanges heat with the heating return flowing through the heat exchanger. In the exchange apparatus, the left and right blisters 32 and 33 are composed of a left blister 32, a right blister 33, and an upper blister 34 passing through each other so that the entire body 10 serves as a heat exchanger. ) Through the at least one connecting pipe 35 and the main blister 31 is installed in the upper portion of the combustion chamber 20, the inside of the main blister 31 at a predetermined angle and a plurality of zigzag At the same time as installing the pipe (40, 40a) and the inlet of the pipe (40, 40a) formed adjacent to the outlet of the pipe (40, 40a) at the same time with the guide plate 60 at the same time combustion gas is associated ( 40) (40a) to pass through in a zigzag and the upper portion of the main blister 31 Wood pellet boiler, characterized in that by installing the flue 90 to pass through the center of the upper blister (34).

The method according to claim 1,
Wood pellet boiler, characterized in that the cold heating return inlet pipe 36 is installed in the lower portion of the left blister 32 or the right blister 33 and the hot heating return discharge pipe 37 is installed in the upper blister 34 .

The method according to claim 1,
The front and rear doors 11 and 12 are installed at the front and the rear of the main body 10 so as to be opened and closed, and the front and rear doors 11 and 12 are located on the lower part of the inlet and the outlet of the associative 40 and 40a. The bent portion 61 of the guide plate 60 is formed by forming a bent portion 61 on the guide plate 60 while simultaneously fixing the diaphragms 41 and 42 to coincide with the connection surface 13. The wood pellet boiler, characterized in that the guide plate 60 is connected to the plate 42 located in the lower portion as it is mounted on and supported by the plate (41) located in the lower portion to form a closed circuit in which combustion gas moves.

The method according to claim 1,
Wood pellet boiler, characterized in that the screw 50 made of a plate shape is installed in each of the associated (40, 40a) to delay the discharge of the combustion gas.