KR20120123838A - The boiler with a wood pellet - Google Patents

Abstract

PURPOSE: A wood pellet boiler is provided to remove interferential elements for the combustion pallet by preventing the pile of sludgy. CONSTITUTION: A wood pellet boiler(100) comprises a housing(10), a pellet storing unit(20), a combustion unit(30), a pellet feed port(40), a blowing module, and a heat exchange module(70). The pellet storing unit is installed in the housing. The combustion unit generates heat energy by combusting the pallet. The heat exchange module discharges inner air of the heat exchange pipe by heating the outer surface of the heat exchange pipe.

Description

Wood pellet boiler {The boiler with a wood pellet}

The present invention relates to a wood pellet boiler, and more particularly, to a wood pellet boiler which is environmentally friendly while reducing heating costs by using pellets as a raw material.

In general, a boiler is a means for heating a water tank circulated for hot water and heating while the burner is operated by a control system such as an electric ignition method, and oil or gas is mainly used as the fuel.

In the case of a boiler using oil or gas as a fuel, the cost of purchasing the fuel is excessive and maintenance costs are high, so the burden of using the boiler is increasing in rural areas where the income level is low.

In view of these characteristics, boilers using pellets produced by processing rice husk, sawdust, and other sludge have been devised and used a lot.

However, it is a boiler using pellets designed for better fuel efficiency as well as to the environment, and there is a problem that the fuel efficiency is not high because the combustion of the pellets is not properly performed.

In addition, since the sludge accumulated on the combustion part is accumulated in the combustion part, it hinders the combustion of the pellet, and there is a problem that the residue is frequently removed.

In addition, there is also a concern that the flame from the combustion chamber is backfired, which is a problem that can be directly connected to a fire, and therefore, an urgent need for improvement is required.

The present invention is to solve the above problems, an object of the present invention is to provide a wood pellet boiler that is excellent in fuel efficiency, the discharge of sludge is reduced, and can prevent flame backfire.

The wood pellet boiler according to the present invention includes a housing forming an exterior, a pellet storage unit provided inside the housing for storing pellets, a combustion unit for burning the pellets to generate thermal energy, and the pellet storage unit Pellet supply unit for transferring to the combustion unit in the air, and a blower module for blowing air to the combustion unit, and a heat exchange module for heating the outer surface of the heat exchange pipe with heat energy generated in the combustion unit to discharge the air inside the heat exchange pipe to the outside It is characterized by.

And a pellet supply pipe communicating the pellet storage part with the pellet supply part, wherein the pellet supply pipe includes a first connection part vertically communicating with an open lower surface of the pellet storage part, and an angle at the first connection part. It characterized in that it comprises a inclined portion extending inclined downward to the lower portion, and a second connecting portion extending vertically from the inclined portion in communication with the pellet supply portion.

Further, the pellet supply part is a pellet conveying pipe one side is in communication with the second connecting portion of the pellet supply pipe and the other side extends to the lower portion of the combustion section, the shaft rod provided in the longitudinal direction inside the pellet conveying tube, and the outer peripheral surface of the shaft Including a transfer screw spirally formed in the, and the transfer motor for rotating the transfer screw, when the shaft rod is rotated by the drive of the transfer motor, the pellets are sent to the lower portion of the combustion unit while hitting the transfer screw to the combustion Is configured to be loaded with the combustion part from the lower part of the combustion part,

The blower module includes a blower means for supplying air, a first blower pipe connected to the blower means to form a flow path, and an extension from one side of the first blower pipe to cover a part of the outer circumference of the pellet supply pipe. An air inlet hole through which the air flows into the outer circumferential surface of the pellet supply pipe surrounded by the branch pipe, and the flow path from the flashback prevention tube to the combustion section, and surrounded by the flashback prevention tube. This formed is characterized by more specific features.

According to the present invention,

First, since pellets are supplied from the lower part to the combustion part, sludge hardly accumulates in the combustion part, thereby eliminating the factors that hinder the combustion of the pellets, and the garbage cleaning cycle is prolonged, thereby making it easy to manage.

Second, the combustion efficiency of the boiler is increased by the complete combustion of the pellets by the air supplied to the combustion chamber.

Third, by allowing a certain amount of air to be injected into the pellet supply unit, it is possible to prevent the backfire of the flame from the combustion unit to the pellet supply unit side to reduce the risk of an accident.

1 is a side view showing a wood pellet boiler according to the present invention.
Figure 2 shows a part of a wood pellet boiler according to the present invention.

Preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, and descriptions of well-known techniques will be omitted.

1 is a side view showing a wood pellet boiler according to an embodiment of the present invention, Figure 2 shows a portion of a wood pellet boiler according to an embodiment of the present invention.

1 to 2, wood pellet boiler 100 according to an embodiment of the present invention is a housing for forming an appearance, and a pellet storage provided in the housing 10 to store the pellets 2 The part 20, the combustion part 30 which burns pellets P, and generates heat energy, the pellet supply part 40 which transfers pellets P from the pellet storage part 20 to the combustion part 30, , A pellet supply pipe 50 for communicating the pellet storage unit 20 and the pellet supply unit 40, and a blower module 60 to blow the air into the combustion unit 30 so that the combustion of the pellets P is performed smoothly. The heat exchange module 70 heats the outer surface of the heat exchange pipe 72 with the heat energy generated by the combustion unit 30 and discharges the air inside the heat exchange pipe 72 to the outside.

The housing 10 forms an overall skeleton of the wood pellet boiler 100. The housing 10 includes a pellet storage unit 20, a combustion unit 30, a pellet supply unit 40, a pellet supply pipe 50, Blowing module 60, heat exchange module 70 is provided.

Pellet storage unit 20 is provided on the inner upper side of the housing 10, this pellet storage unit 20 is formed so that the upper side is to be able to store a large amount of pellet (2) therein. At this time, the lower side of the pellet storage portion 20 is tapered surface is formed so that the diameter becomes smaller, the pellet (P) is configured to be concentrated in the pellet storage portion 20 lower.

In addition, the lower surface of the pellet storage unit 20 is opened and connected to the pellet supply pipe 50 and the pellet supply pipe 50 is in communication with the pellet supply unit 40, the pellet (P) that was stored in the pellet storage unit 20 The pellet supply unit 40 is to be supplied.

The pellet supply pipe 50 is inclined at an inclined angle extending from the first connecting pipe 51 and the first connecting pipe 51 perpendicularly to the open lower surface of the pellet storage part 20 and extending downward. And a second connecting pipe 53 extending vertically downward from the inclined pipe 52 to communicate with the pellet supply part 40.

The inclination angle of the inclined tube 52 with respect to the first connecting tube 51 may be formed at an angle of approximately 15 degrees to 20 degrees, the tunnel by the weight of the pellet (P) through the inclined tube 52 The phenomenon can be prevented from occurring. Therefore, since the pellets P falling down to the pellet supply part 40 do not accumulate in the pellet supply part 40, the pellet supply part 40 is smoothly supplied to the combustion part 30.

The combustion unit 30 includes a combustion chamber 31 in which the pellets P transferred from the pellet supply unit 40 are combusted, and a combustion plate 32 provided in the lower side of the combustion chamber 31 to rest the pellets P; And a burner (not shown) provided at the lower side of the combustion plate 32 to ignite the pellets P.

In the combustion chamber 31, an exhaust port 33 is formed on an upper surface thereof, and a tapered surface is formed on the lower side thereof so that the diameter thereof becomes smaller and smaller, similar to the pellet storage unit 20. Moreover, the opening part is formed in the lower side of the combustion chamber 31, and the combustion plate 32 is located in this opening part.

The combustion plate 32 is formed in a circular plate shape, and a plurality of reprocessing holes 32a are formed on the circumference on an inclined surface other than the hole through which the pellets P can be supplied to the center. The reprocessing hole 32a formed as described above is formed such that the pellet 2 before combustion cannot pass, and only the ash remaining in the pellet P is discharged downward through the reprocessing hole 32a. The ash discharged to the bottom is accumulated in the ash tray (A) provided in the pellet supply portion 40 to be collected.

Next, the pellet supply unit 40 is configured to include a pellet feed pipe 41, the shaft 42, the forward feed screw 43, the reverse feed screw 44, the transfer motor 45.

The pellet feed pipe 41 is connected to the second connecting pipe 53 of the pellet supply pipe 50 through one outer peripheral surface thereof and the other side thereof is formed to extend under the combustion unit 30.

The conveying screws 43 and 44 are disposed inside the pellet conveying pipe 41, and the conveying screws 43 and 44 are formed spirally on the outer circumferential surface of the shaft rod 42 provided in the longitudinal direction of the pellet conveying pipe 41. do.

When the shaft rod 42 is rotated by the drive of the transfer motor 45, the pellet supply part 40 is loaded with the pellet P from the lower side of the combustion chamber 31 while being hit by the feed screws 43 and 44. The feed screw is divided into a forward feed screw 43 and a reverse feed screw 44 for more efficient supply.

The forward conveying screw 43 and the reverse conveying screw 44 are divided based on the lower side of the combustion unit 30, and as shown in the drawing, the forward conveying screw toward the conveying motor 45 based on the lower side of the combustion unit 30. 43 is formed, and the reverse transfer screw 44 is formed in the opposite direction with respect to the lower side of the combustion unit 30.

Unlike the screw formed in the same direction, as the pellets are formed in the opposite direction relative to the point where the pellets P are fed upward from the lower part of the combustion unit 30, the pellets P are raised at the point where they are supplied. By being concentrated and rising, it is possible to supply the combustion chamber 31 quickly and efficiently.

In addition, the blower module 60 for supplying air to the combustion unit 30 includes a blower means 61 for supplying air, a first blower tube 62 connected to the blower means 61, and a first blower module 60. A flame arresting tube (63) extending from the blower pipe (62) and provided to cover a portion of the pellet supply unit (40); It is comprised including the 2nd blowing pipe 64.

Blowing means 61 is a fan housing formed to have an inlet, not shown, fan housing

And a fan that is accommodated inside the gong to force the flow of air, and a blower motor that provides rotational force to the fan.

Therefore, when a control command is provided to the blower motor through a controller (not shown), the fan rotates to generate air flow, and the outside air introduced through the inlet moves along the first blower tube 62 and the backfire prevention blower 63. Next, it is supplied to the combustion chamber 31 through the second blowing pipe (64).

On the other hand, the air inlet hole (41a) is formed on the outer circumferential surface of the pellet transport pipe 41 surrounded by the flashback prevention tube 53, the air introduced into the flashback prevention tube 53 pellets through the air inlet hole (41a) It is configured to be introduced into the transport pipe (41).

In this way, the air is introduced into the combustion chamber 31 downward through the pellet transport pipe 41 by the flashback preventing pipe 53, and thus, into the combustion chamber 31 through the second blow pipe 64 of the blower module 60. The introduced air can be prevented from being backfired into the pellet supply pipe 50 through the lower portion of the combustion chamber 31.

Next, the heat exchange module 70 is provided in the housing 10. The heat exchange module 70 includes a heat exchange blower 71 and a plurality of heat exchange pipes 72 connected to the heat exchange blower 61. In the heat exchange pipe 72, the air passing through the inside exchanges heat with the combustion gas that heats the outer surface of the heat exchange pipe 72 to discharge warm air to the outside of the housing 10. The heat exchange pipe 62 is preferably formed of a structure bent several times in the housing 10 to increase the residence time of the combustion gas for efficient heat exchange.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. And the scope of the present invention should be understood as the following claims and their equivalents.

100: Wood Pellet Boiler
10: Housing
20: pellet storage unit
30: combustion unit
40: pellet supply unit
50: pellet feed pipe
60: blower module
70: heat exchange module

Claims (4)

A housing forming an appearance,
A pellet storage unit provided in the housing to store pellets;
A combustion unit for generating thermal energy by burning the pellets;
A pellet supply part for transferring the pellets from the pellet storage part to the combustion part;
A blowing module for blowing air into the combustion unit;
And a heat exchange module for heating the outer surface of the heat exchange pipe with the heat energy generated by the combustion unit and discharging the air inside the heat exchange pipe to the outside. The method of claim 1,
Further comprising a pellet supply pipe for communicating the pellet storage portion and the pellet supply portion,
The pellet supply pipe may include a first connection part vertically communicating with the open lower surface of the pellet storage part, an inclination part extending downward from the first connection part at an angle, and vertically extending from the inclination part to the pellets. A wood pellet boiler comprising a second connection in communication with the supply. The method of claim 2,
The pellet supply unit and the pellet conveying pipe one side is in communication with the second connecting portion of the pellet supply pipe and the other side extends to the lower portion of the combustion section;
An axial rod provided in the longitudinal direction inside the pellet feed pipe;
A feed screw spirally formed on an outer circumferential surface of the shaft;
Including a transfer motor for rotating the transfer screw,
When the shaft rod is rotated by the drive of the transfer motor, the pellet is hit by the conveying screw is transported to the lower portion of the combustion unit, the wood pellet boiler characterized in that it is loaded with the combustion unit from the lower portion of the combustion unit. The method of claim 2,
The blower module includes a blowing means for supplying air;
A first blowing pipe connected to the blowing means to form a flow path;
A flashback prevention tube extending from one side of the first blowing pipe and covering a portion of the outer circumference of the pellet supply pipe;
A second blowing pipe for forming a flow path from the flashback prevention pipe to the combustion section;
Wood pellet boiler, characterized in that the air inlet hole through which the air can be introduced from the flame arrester tube is formed on the outer peripheral surface of the pellet supply pipe surrounded by the flame arrester tube.

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