KR20120012041A - A burner of a hot-water boiler - Google Patents

Abstract

PURPOSE: A combustor of a hot water boiler is provided to improve the efficiency of combustion because a burner malfunction of a pellet combustor caused by a lack of an air supply for combustion is supplemented by a blower. CONSTITUTION: A combustor of a hot water boiler comprises a pellet combustor(200). The pellet combustor is inserted into a combustion chamber through a second fuel input(120). The pellet combustor comprises a burner(210), a pellet supplying pipe(230), a blowing pipe(240), and a shielding plate(250). The burner is connected to the pellet supplying pipe. The pellet supplying pipe supplies pellets from a hopper(220) to a nozzle(211) of the burner. A screw axis(232) of the pellet supplying pipe is driven by a motor(231). The blowing pipe is installed in one side of the burner. The blowing pipe supplies air required for the combustion to a spraying hole(212) of the burner by an operation of a blowing fan(241). The shielding plate is installed in a pipeline of the blowing pipe and the pellet supplying pipe connected to the burner. When the burner is inserted into the combustion chamber, the shielding plate closes the second fuel input.

Description

A burner of a hot-water boiler

The present invention relates to a combustion apparatus of a hot water boiler, and more particularly, in a hot water boiler using coal fuel such as lump coal or lignite as a heat source, the pellet is supplied to be burned by replacing the coal fuel with wood pellets. The present invention relates to a combustion apparatus of a hot water boiler, which is capable of attaching and burning a burner to a combustion chamber of a boiler, thereby improving the economy and convenience due to the replacement of fuel.

In general, boilers using coal-based solid fuel, which are relatively inexpensive compared to gas or oil-fired boilers, are common in facilities requiring continuous heating such as large facility farms or saunas and houses away from the city center. In recent years, environmentally-friendly and economically advantageous wood and coal, which are made by processing the wood, are fuel boilers.

The boiler using coal fuel or wood (firewood) is provided with a combustion chamber having a water chamber having a predetermined thickness on the upper and outer circumferential surfaces of the gas to ignite the fuel together with the ignition coal, thereby forcing the air necessary for combustion by the blower. The main combustion method is the combustion system.

However, in the case of the coal fuel boiler, due to the incomplete combustion occurs while the combustion takes a relatively long time from the start of combustion until the combustion is normally performed, the thermal efficiency is lowered, as well as dust is discharged to the atmosphere together with the unburned exhaust gas. There was a problem that pollutes the environment.

In addition, in the case of a boiler using wood as a fuel, there is an inconvenience and hassle that requires a lot of work by continuously inputting wood during combustion, and in recent years, in order to compensate for the problems caused by the supply of wood fuel, A pellet boiler has been introduced that can be automatically supplied by processing it into pellets of uniform size as a raw material.

In the case of the pellet boiler, the disadvantages of irregular sized wood are improved, and the recycled wood and waste materials can be recycled, thereby making it more economical and efficient than coal, which has been evaluated as a relatively economical fuel in various industries. As it is fueled, its use is spreading.

However, despite the advantages and positive evaluations of pellet boilers, demand for replacement installations was low due to the depreciation loss and initial purchase cost burden.

In other words, if the remaining fuel life of a coal fuel boiler remains for a long time, even if the economics and convenience of use of pellet fuel are taken into consideration, economic demand cannot be expected compared to the investment cost of replacing a device with a pellet boiler, so the demand is low. There was a problem.

The present invention is in view of the problems caused by the economic burden when replacing the conventional coal fuel or wood fuel boiler with a pellet boiler, the object of the combustion while automatically supplying pellets to the combustion chamber provided in the existing coal boiler It is to provide a combustion device of a hot water boiler that can be installed to attach and remove the burner selectively to increase the economy and convenience due to the replacement of fuel.

The present invention for achieving the above object is installed in the combustion chamber of the coal-fueled boiler to selectively attach and remove the burner of the pellet burner fueled by the pellet, the burner crater of the burner from the hopper loaded with pellets A pellet supply pipe equipped with a screw shaft driven by a motor to supply pellets is connected, and one side of the burner is provided with a blower pipe for supplying air for combustion to the injection hole of the burner by the operation of the blower fan, and the burner A shielding plate for closing the second fuel inlet when the burner is inserted into the combustion chamber is installed on the pipeline of the pellet supply pipe and the blower pipe connected to the pellet supply pipe, so that pellets obtained by processing wood using a coal-fired boiler can be used as fuel. It would be.

The combustion device of the hot water boiler of the present invention is configured to selectively attach and remove the pellet burner using the pellet fuel to the boiler that uses the coal fuel, thereby avoiding the restriction on the type of fuel and introducing a new boiler. It is economical to reduce the cost incurred, and it is possible to increase the combustion efficiency by supplementing the defects caused by the lack of supply of combustion air among the functions of the burner provided in the pellet burner. There are also advantages.

1 is an enlarged perspective view of a pellet burner removed from the combustion apparatus of the hot water boiler of the present invention by cutting a portion thereof, and a combustion device of the hot water boiler;
2 and 3 is a cross-sectional view showing a perspective view of the combined state and the use state of the pellet burner in the combustion apparatus of the hot water boiler of the present invention,
Figure 4a and 4b is a perspective view showing a cross-sectional configuration by partially extracting the pellet supply portion and the burner of the pellet burner in the combustion device of the hot water boiler,
5 is a cross-sectional configuration diagram of a conventional coal-fired boiler.

Hereinafter, the combustion apparatus of the hot water boiler of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 5, coal fuel C is stacked in an internal combustion chamber 130 through first and second fuel inlets 110 and 120 installed at an outer front surface of the gas 100. The present invention relates to a combustion apparatus capable of burning by replacing the coal fuel with wood pellets (F) in a boiler using coal, which has been ignited and combusted, as a heat source.

Inside the gas 100, a water chamber 140 filled with water is disposed in the upper and lower portions and the periphery of the combustion chamber 130 formed at the center thereof. Is connected, one side of the water chamber is formed with a plurality of associations 142 to guide the discharge of the combustion heat generated in the combustion chamber after passing through the flue 143.

The lower portion of the water pipe 141 having the loss stall function removes the foreign matter remaining in the storage chamber 170 and the storage chamber for circulating air necessary for combustion while remaining in the combustion process or various foreign substances generated after the combustion fall. A door 171 is provided to communicate with the outside of the gas 100 so that the water outlet 144 and the circulated water are discharged from the water chamber 140 by the heat exchange action. Inflow openings 145 are respectively piped.

Air generated by the driving of the blower fan 150 is provided on the side of the combustion chamber 130 via the ventilation path 160 provided at the bottom of the gas 100, and then operated by the control lever 163. First and second air supply pipes 161 and 162 for selectively supplying the lower side or the entire upper and lower sides are provided.

The first and second fuel inlets 110 and 120 installed on the outer front of the gas 100 are respectively provided with doors that can be sealed at the time of combustion, and the door of the second fuel inlet is a pellet burner using pellet fuel. When the 200 is installed to be detachable to maintain the open state.

The burner 210 provided at the front end of the pellet burner 200 is inserted into the combustion chamber 130 through the second fuel inlet 120 so as to be seated on the water pipe 141 which has a stall function.

The pellet burner 200 is driven by a motor 231 to supply pellets that are automatically dropped from the hopper 220 loaded with pellets F to the crater 211 provided at the center of the burner 210. A pellet supply pipe 230 equipped with a screw shaft 232 and one side of the burner 210 are connected to the injection hole 212 of the burner 210 by the air required for combustion by the operation of the blower fan 241. The second fuel inlet 120 is closed when the burner is inserted into the combustion chamber 130 by being installed on the air supply pipe 240 for supplying and the pipes of the pellet supply pipe 230 connected to the burner 210 and the air blowing tube 240. The shielding plate 250 is comprised.

The burner 210 ejects the air forcedly supplied by the blower tube 240 to the center of the crater 211 provided at the distal end of the pellet supply pipe 230 for supplying the pellets while being diffused in the cylinder body. It is made into a disk shape provided with a myriad of injection holes 212.

The front end portion of the blower pipe 240 for supplying air to the burner 210 is connected to the pellet pipe (230) of the branch pipe 242 for branching a part of the air is connected to the pellet conveyed by the screw shaft 232 Air was blown with (F) to facilitate the transfer and combustion of the pellets.

On the other hand, it is preferable to install a conventional igniter (not shown) that generates sparks electronically when the pellets are initially ignited in the vicinity of the burner 211 provided in the central portion of the burner 210.

Therefore, in the present invention as described above, when replacing the coal fuel with pellets, insert the burner 210 provided in the front end of the pellet burner 200 in the combustion chamber 130 of the gas 100 constituting the boiler, The second fuel inlet 120, which is the inlet of the combustion chamber 130, is closed with the shielding plate 250 provided on the pipe of the pellet supply pipe 230 and the blower pipe 240 connected to the burner 210 to prepare for combustion. do.

When the switch (not shown) of the pellet burner 200 is operated in the combustion ready state, the screw shaft 232 installed in the hollow portion of the pellet supply pipe 230 is driven by the motor 231 to the hopper 220. The stored pellet F is gradually transferred to the distal end of the pellet supply pipe 230 and supplied to the crater 211 provided at the center of the burner 210, and at the same time, the blower pipe 240 connected to one side of the burner 210. By blowing air generated in the blower fan 241 into the burner 210 through the injection hole 212, the igniter installed adjacent to the fireball 211 ignites the pellets supplied to the fireball Will be made.

Therefore, the blower fan 150 installed at one side of the gas 100 in the process of combustion is supplied to the burner 210 located in the combustion chamber 130 by the operation of the pellet burner 200 together with the pellet fuel and the air required for combustion. Is driven to supply air supplied through the ventilation path 160 provided at the bottom of the gas 100 to the combustion chamber through the first and second air supply pipes 161 and 162 provided on the side of the combustion chamber 130. By selectively supplying the lower side or the entire upper and lower sides, it is possible to prevent the incomplete combustion generated when the amount of air supplied from the pellet burner 200 is insufficient to increase the combustion efficiency.

As the combustion operation of the pellet burner 200 is performed, heat generated in the combustion chamber is discharged to the flue 143 through the water pipe 141 and the plurality of pipes 142 and the water pipe 140 around the combustion chamber. The filled water is heated, and the heated water is supplied to the outside of the gas through the outlet port 144, circulated and heat exchanged, and then flows back into the chamber through the inlet port 145.

The present invention is configured to selectively attach and detach the pellet burner using the pellet fuel to the boiler that uses the coal fuel in the past to avoid the constraints on the type of fuel to reduce the cost incurred when introducing a new boiler It is possible to reduce and improve the combustion efficiency by supplementing the defects due to the lack of supply of combustion air among the functions of the burner provided in the pellet burner by the blower provided in the gas.

100: gas 110: first fuel inlet
120: second fuel inlet 130: combustion chamber
140: water room 141: water pipe
142: Association 143: Year
150, 241: blower fan 160: ventilation path
161: first air supply pipe 162: second air supply pipe
163: control lever 170: storage compartment
200: pellet burner 210: burner
211: crater 212: injection hole
220: hopper 230: pellet feed pipe
231: motor 232: screw shaft
240: blowing pipe 242: branch pipe
250: shield plate

Claims (2)

A combustion chamber 130 in which fuel is injected through the first and second fuel injection holes 110 and 120 installed on the front of the gas 100 is provided, and after the heat of combustion passes around the combustion chamber 130, A water chamber 140 filled with water to be heat-exchanged in the process of being discharged through the flue 143 and a plurality of associations 142 are disposed to be wrapped, and the upper and lower portions of the combustion chamber 130 are driven by the blower fan 150. First and second air supply pipes 161 and 162 having an adjusting lever 163 to selectively supply generated air to the upper or lower portion of the combustion chamber via the ventilation path 160 provided at the bottom of the gas 100. In a boiler equipped with
A pellet burner 200 having a burner 210 is installed at a distal end thereof so as to be inserted into the combustion chamber 130 therein through the second fuel inlet 120, and the burner 210 is loaded with pellets F. Connected to a pellet supply pipe 230 equipped with a screw shaft 232 driven by a motor 231 to supply the burner 210 to the crater 211 of the burner 210, and One side is provided with a blower pipe 240 for supplying the air required for combustion by the operation of the blower fan 241 to the injection hole 212 of the burner 210, the pellet supply pipe 230 connected to the burner 210 and The combustion apparatus of the hot water boiler, characterized in that the shield plate 250 for closing the second fuel inlet 120 is installed when the burner is inserted into the combustion chamber 130 on the pipeline of the blower tube (240). According to claim 1, Blowing by connecting the branch pipe 242 to the front end of the blower pipe 240 for supplying air to the burner 210 by the driving of the blowing fan 241 and the pellet supply pipe 230 of one side Combustion apparatus of a hot water boiler, characterized in that a part of the air supply to the burner via the pellet supply pipe 230.

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