KR20120124251A

KR20120124251A - Bio fuel combusion device

Info

Publication number: KR20120124251A
Application number: KR1020110042036A
Authority: KR
Inventors: 이사오 이노우에
Original assignee: 유겐가이샤 다이요
Priority date: 2011-05-03
Filing date: 2011-05-03
Publication date: 2012-11-13

Abstract

PURPOSE: A bio fuel combustion apparatus is provided to supply high temperature gas into a combustion inner drum smoothly by arranging a blower obliquely to a rotary shaft of the combustion inner drum. CONSTITUTION: A bio fuel combustion apparatus comprises a combustion outer drum(600), a combustion inner drum(700), a roller, a blower, a nozzle(720), a fuel supply part(100), a supply pipe(400), a screw(300), an ignition unit(500), and a connection pipe(510). The combustion inner drum is installed to be rotated. The roller supports the exterior of the inner drum. The blower is installed in the combustion outer drum and supplies high temperature gas. The nozzle supplies the high temperature gas to the combustion inner drum. The fuel supply part supplies bio fuel. The screw is installed in the supply pipe. The connection pipe connects the ignition unit and the combustion drum and surrounds the fuel supply pipe.

Description

Biofuel Combustor {BIO FUEL COMBUSION DEVICE}

The present invention relates to a biofuel combustion apparatus, and in particular, a combustion outer cylinder, a combustion inner cylinder disposed inside the combustion outer cylinder and rotatably installed with respect to the combustion outer cylinder, and a roller supporting the outer circumferential surface of the combustion inner cylinder; And a blower installed in the combustion outer cylinder to supply hot gas, a nozzle installed in the combustion inner cylinder to inject the hot gas into the combustion inner cylinder, a fuel supply unit supplying biofuel, and a fuel supply unit; A supply pipe connecting the combustion inner cylinder, a screw installed inside the supply pipe, an ignition device for igniting the biofuel, a connection pipe connecting the ignition device and the combustion inner cylinder and surrounding the supply pipe. It relates to a biofuel combustion apparatus.

Conventional biofuel combustion apparatus (Japanese Laid-Open Patent Publication No. 2010-32140) is a mixture of chaff, sawdust, waste paper, shells, straws, textile waste, and waste plastics, and compressed and pelletized (pellets). Is inserted into a rotating steel pipe and ignited.

A variety of waste pellets are used as petroleum substitute fuels by blowing the combustion air in the direction to rotate the combustion air from the hot air inlet formed on the outer circumference of the steel pipe and injecting it into the boiler. In addition, fossil fuel consumption can be reduced by 80%.

Plant debris and waste products do not burn even when compressed and solidified, but when mixed and assembled with 10-30% plastic waste products, they become stable and burn high-calorie fuel.

Pelletized fuel burns quickly because the smaller the particle size, the larger the oxidation area, but it is difficult to burn because it falls to ashes on the lattice.

Conventional biofuel combustion apparatus rotates the pellets by inserting them into a pellet burner composed of a tube and an exterior supporting the same while rotating a small diameter pellet of about 48 mm, and rotating the inner tube. While warming the air in the outer cylinder to about 200 ~ 300 ℃ by the heat transmitted to the outer surface of the rotary cylinder while moving in the direction of the crater of the burner with the transmission blade installed inside, the pellet in the inner cylinder from the spout installed in the inner cylinder ) To burn pellets at high temperatures quickly.

The pellet which burns at a high temperature continues combustion while rotating as the inner cylinder rotates, moves toward the burner outlet, becomes ash, and falls from the burner outlet to ashes.

According to the results of the combustion test, 50 kg of pellets of 80% of 6 mm diameter chaff and 20% of waste plastic were burned in one hour, generating about 500,000 kilocalories of heat.

Compressing and assembling the waste plastic in flame retardant waste such as rice husks, pellets of about 6000 kilocalories / kg are produced.

The conventional invention will be described in more detail.

Pellet is fed to the double-pipe burner of the prior art, and after ignition with the ignition burner, if the pressure is blown at the starting point of the flame, the flame increases in about 30 seconds. do.

When the blowing flame becomes large enough, the inner tube is rotated at a speed of 1 rotation for 1 minute to start supply of new fuel pellets, and this is continuously performed.

Waste plastics are removed with a demineralizer and then crushed up to 4 mm with a crusher, and 20-30% are mixed with chaff or wood waste.

The mixed material is put into peretamacin, compressed to a pressure of about 200 Kg / cm, and formed into pellets of 4 to 6 mm diameter.

The pellets are stored in stock silos, then distributed near a boiler equipped with a pellet burner and stocked for 2-6 days.

Stocked fuel pellets are pressed through a hopper attached to a pellet burner into a rotating barrel of a pellet burner and ignited with a ignition burner to combust combustion.

30 to 60 seconds after the start of combustion, the inner cylinder starts to rotate, and air heated at 80 ° C to 150 ° C outside the inner cylinder passes through the nozzle tube, is injected into the inner cylinder and sprayed into the pellet during combustion. The pellet burns violently.

This combustion rate is 4050 Kg per hour in the case of 200 mm of internal diameters, and the high temperature gas blown out from a burner will be about 9001200 degreeC, and will be 400,000 500,000 calories in a calculated value.

When the water temperature or steam pressure in the boiler reaches the set value, the pressure switch or the signal of the temperature switch is thrown off and the fuel supply is stopped. Then, the amount of combustion air is adjusted to the minimum, and the coal burner in the pellet burner is fired. The gas temperature is about 200 ° C., that is, the output of the burner is reduced by the capacity of 10 to 15%.

When the water temperature or steam pressure in the boiler decreases, and the burner needs to be turned to high output, first, the supply of pellet fuel is started and the blower fan supplies the combustion air when the combustion is confirmed by the photoelectric device. After the ejected gas temperature becomes sufficiently high, the inner tube starts to rotate and shifts to normal operation.

Even when in operation, when the hot gas temperature is low, the ignition heavy oil burner operates for the necessary time to assist combustion.

A heavy oil is used abundantly for a boiler used as a heat source, but the amount of CO2 generated by this is required to reduce its discharge as an environmental countermeasure.

For example, A heavy oil is currently used as a fuel for heating boilers such as greenhouses, and when the pellets and burners of the present invention are supplied to reduce CO 2 emissions accordingly, the annual estimate is around 1 farmhouse. When 60 tons of A heavy oil is used, and the heat source conversion by the conventional invention can reduce the current cost near Ichinohe, the average CO2 reduction amount reaches 19 tons / year, and 1 million conventional invention products. In the case of dissemination, the annual CO2 reduction totals 19 million tons / year.

In addition, it is shown in Japanese Laid-Open Patent Publication No. 1997-72525 to support through a roller to stably support the rotating furnace.

In addition, Japanese Patent Laid-Open No. 4085412 shows that the portion to be burned is a double tube, and the inner tube is formed with a hole through which additional combustion air can be introduced.

In addition, Japanese Laid-Open Patent Publication No. 2002-323213 shows that an input feeder is installed in a rotary kiln furnace and a burner is installed in a rotary kiln furnace.

However, such a conventional biofuel combustor has a burner installed in the inner barrel, which makes it difficult to effectively ignite the biofuel, the burner is disposed parallel to the axis of rotation of the inner barrel, and the blower is disposed perpendicular to the axis of rotation of the inner barrel. , There is a problem that the heated air does not flow smoothly into the inner barrel and interfere with the rotation of the inner barrel.

Japanese Laid-Open Patent Publication No. 2010-32140, Japanese Laid-Open Patent Publication No. 4085412, Japanese Laid-Open Patent Publication No. 1997-72525, Japanese Laid-Open Patent Publication No. 2002-323213

The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a biofuel combustion apparatus in which combustion is more effective by heating the supplied biofuel.

The biofuel combustion apparatus of the present invention for achieving the above object is a combustion outer cylinder, a combustion inner cylinder disposed inside the combustion outer cylinder, rotatably installed with respect to the combustion outer cylinder, and supporting an outer circumferential surface of the combustion inner cylinder. A roller, a blower installed in the combustion outer cylinder to supply hot gas, a nozzle installed in the combustion inner cylinder to inject the hot gas into the combustion inner cylinder, a fuel supply unit supplying biofuel, and the fuel A supply pipe connecting a supply part and the combustion inner cylinder, a screw installed inside the supply pipe, an ignition device for igniting the biofuel, a connection pipe connecting the ignition device and the combustion inner cylinder and surrounding the supply pipe. It includes.

The blower may be disposed to be inclined with respect to the rotating shaft of the combustion cylinder to face the outlet of the combustion cylinder.

According to the biofuel combustion apparatus of the present invention as described above, there are the following effects.

A combustion outer cylinder, a combustion inner cylinder disposed inside the combustion outer cylinder and rotatably installed with respect to the combustion outer cylinder, a roller supporting an outer circumferential surface of the combustion inner cylinder, and a blowing air provided in the combustion outer cylinder to supply hot gas An apparatus, a nozzle installed in the combustion inner cylinder to inject the hot gas into the combustion inner cylinder, a fuel supply unit for supplying biofuel, a supply pipe connecting the fuel supply unit and the combustion inner cylinder, and installed inside the supply tube And a screw, a ignition device for igniting the biofuel, and a connection pipe connecting the ignition device and the combustion inner cylinder, and installed to surround the supply pipe, so that combustion is more effective by heating the supplied biofuel. It can be quick.

The blower is disposed inclined with respect to the rotation shaft of the combustion cylinder to face the outlet of the combustion cylinder, the hot gas can be smoothly introduced into the combustion cylinder, the hot gas and the combustion cylinder Friction of the combustion can be smoothly rotated by the combustion inner cylinder.

1 is a cross-sectional view of a biofuel combustion apparatus according to a preferred embodiment of the present invention.
2 is a plan view of a biofuel combustion apparatus according to a preferred embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

For reference, among the configurations of the present invention to be described below, the same configuration as the prior art will be referred to the above-described prior art, and a detailed description thereof will be omitted.

1 and 2, the biofuel combustion apparatus of the present embodiment is disposed inside the combustion cylinder 600, the combustion cylinder 600, and rotatably installed with respect to the combustion cylinder 600. A combustion inner cylinder 700, a roller supporting an outer circumferential surface of the combustion inner cylinder 700, a blower 650 installed in the combustion outer cylinder 600 to supply hot gas, and the combustion inner cylinder 700. Is installed in the nozzle 720 for injecting the hot gas to the combustion inner cylinder 700, the fuel supply unit 100 for supplying biofuel, the fuel supply unit 100 and the combustion inner cylinder 700 is connected A supply pipe 400, a screw 300 installed inside the supply pipe 400, an ignition device 500 for igniting the biofuel, and a connection between the ignition device 500 and the combustion inner cylinder 700. And a connecting pipe 510 installed to surround the supply pipe 400.

As shown in Figure 1, the combustion outer cylinder 600 is formed so that the inlet side and the outlet side open, it is arranged horizontally.

Packing inlet 601 is installed at the inlet end and the outlet end of the combustion outer cylinder 600, the packing (P1, P2) is installed.

The outer cylinder bracket 610 is installed at the inlet side and the outlet side lower portion of the combustion outer cylinder 600, so that the combustion outer cylinder 600 is installed on the work table (W).

An incision is formed in the lower portion of the combustion outer cylinder 600.

The combustion inner cylinder 700 is disposed inside the combustion outer cylinder 600, and is rotatably installed with respect to the combustion outer cylinder 600.

The combustion inner cylinder 700 is formed so that the inlet side and the outlet side are open, and are arranged horizontally.

The combustion inner cylinder 700 is formed to have a smaller outer diameter than the combustion outer cylinder 600, and is formed longer than the combustion outer cylinder 600.

The combustion inner cylinder 700 is spaced apart from the inner wall of the combustion outer cylinder 600 so that the combustion inner cylinder 700 is rotatable relative to the combustion outer cylinder 600.

The refractory brick 710 is installed at the outlet end of the combustion inner cylinder 700.

Further, a protrusion 701 is formed in the combustion inner cylinder 700 between the inlet side and the outlet side, and the inlet side and the outlet side, respectively.

The protrusion 701 is formed along the inner circumference of the combustion inner cylinder 700, and the inlet side and the outlet side are formed to be inclined.

Combustion inner cylinder 700 is provided with a plurality of installation holes.

Screw grooves (not shown) may be formed on the inner wall of the combustion inner cylinder 700. When the combustion cylinder 700 is rotated due to the screw groove, the fuel inserted into the combustion cylinder 700 along the screw groove may be effectively moved to the combustion cylinder 700 outlet while burning.

An end plate 740 having an outer diameter larger than that of the combustion inner cylinder 700 is installed at the inlet of the combustion inner cylinder 700.

The end plate 740 is formed with a through hole having a diameter smaller than the inner diameter of the combustion inner cylinder 700.

The shaft diameter portion 730 is fitted into the through hole.

The outlet end of the shaft portion 730 is installed to be continuous to the protrusion 701.

The roller supports the outer circumferential surface of the combustion inner cylinder 700.

The roller includes a first roller 910 disposed at the inlet side of the combustion inner cylinder 700 and a second roller 920 disposed at the outlet side of the combustion inner cylinder 700.

The first and second rollers 910 and 920 are installed on the work table W through roller brackets 911 and 921.

A seating groove in which the end plate 740 is seated is formed on the outer circumferential surface of the first roller 910.

The first roller 910 may also play a role of supporting the combustion inner cylinder 700 does not move in the front and rear directions due to the seating groove.

The second roller 920 is inserted into the cutout of the combustion outer cylinder 600.

The rotating device for rotating the combustion inner cylinder 700 includes a reduction motor 800, a first sprocket 820 installed on the shaft of the reduction motor 800, and a second installation on the outer circumferential surface of the shaft diameter portion 730. The sprocket 731 and the chain C fitted to the 1st sprocket 820 and the 2nd sprocket 731 are included.

The reduction motor 800 is installed through the motor bracket 810 on the outer circumferential surface of the combustion outer cylinder 600.

In the rotation device, when the reduction motor 800 is driven, the first sprocket 820 is rotated. As the first sprocket 820 rotates, the chain C rotates, and the chain C is rotated. As the) rotates, the second sprocket 731 rotates, and thus the shaft diameter portion 730 and the combustion inner cylinder 700 rotate.

The second sprocket 731 is provided on the outer circumferential surface of the shaft diameter portion 730.

The blower 650 is installed to supply the hot gas generated through the hot gas generator (not shown) to the combustion outer cylinder 600.

The blower 650 and the inlet pipe connected to the blower 650 are disposed to be inclined with respect to the rotational axis of the burner inner cylinder 700 to face the outlet of the burner inner cylinder 700.

In this way, the blower 650 is disposed, the hot gas can be smoothly introduced into the combustion inner cylinder 700, the friction between the incoming high temperature gas and the rotating combustion inner cylinder 700 is reduced to reduce the combustion inner cylinder 700 may be smoothly rotated.

Preferably, as shown in FIG. 2, the blower 650 is arrange | positioned so that the angle (theta) between the blower 650 and the rotating shaft of the combustion inner cylinder 700 may be an acute angle.

The nozzle 720 is installed in the combustion inner cylinder 700, communicates with the combustion outer cylinder 600, and injects the hot gas in the combustion outer cylinder 600 to the combustion inner cylinder 700.

A plurality of nozzles 720 are provided, and are installed in the installation holes of the combustion inner cylinder 700, respectively.

The nozzle 720 is installed to be inclined so that the end thereof faces the outlet of the combustion cylinder 700.

The fuel supply unit 100 is formed in a rectangular cylinder shape with an open upper portion to supply biofuel in pellet form manufactured through a conventional pellet granulator.

The supply pipe 400 connects the fuel supply unit 100 and the combustion inner cylinder 700.

The supply pipe 400 is horizontally disposed under the fuel supply unit 100 and communicates with the fuel supply unit 100 and the combustion inner cylinder 700, respectively.

The outlet end of the supply pipe 400 is disposed closer to the outlet of the combustion cylinder 700 than the inlet protrusion 701 of the combustion cylinder 700.

The supply pipe 400 is supported by the support frame 320, and is disposed in a state spaced apart from the work table (W).

Furthermore, the packing installation ring 410 is installed on the outer circumferential surface of the supply pipe 400 so that the packing B3 is disposed between the supply pipe 400 and the shaft diameter portion 730.

As such, the packing P1, the first roller 910, the packing P2, the second roller 920, and the packing P3 are sequentially disposed so that the combustion inner cylinder 700 is spaced apart from the combustion outer cylinder 600. It is supported in a stable state, and the rotation of the combustion cylinder 700 can be smoothed.

The screw 300 is installed inside the supply pipe 400.

The screw 300 is rotated by the screw driver. The screw driving unit, the reduction motor 200, the first pulley 210 is installed on the shaft of the reduction motor 200, the second pulley 310 connected to the screw 300, and the first pulley 210 And a belt B fitted to the second pulley 310.

The reduction motor 200 is installed through the motor bracket 220 on the outside of the fuel supply unit 100.

The screw drive unit when the reduction motor 200 is driven, the first pulley 210 is rotated, the belt B is rotated as the first pulley 210 is rotated, the belt B is rotated As the second pulley 310 is rotated to rotate the screw (300).

The ignition device 500 ignites the biofuel transferred into the combustion inner cylinder 700 through the screw 300.

The connecting pipe 510 connects the ignition device 500 and the combustion inner cylinder 700, and is installed to surround some or all of the supply pipe 400.

The connecting pipe 510 is disposed horizontally, and the bent part 511 bent in the lower part and the side part is formed at the inlet side.

In this way, the connection pipe 510 surrounds the supply pipe 400 for transporting the biofuel, and the heat of the ignition device 500 is transferred to the transported biofuel so that combustion of the biofuel may be more effective and faster.

The operation of this embodiment having the above-described configuration will be described below.

After the pellet is injected into the combustion cylinder 700, the fuel is ignited by the burner 500, and when the air is blown into the combustion cylinder 700 at a low pressure at the time of burning, the flame increases within about 30 seconds, and the amount of air blown is increased. Increasing the flame is ejected from the combustion cylinder 700 outlet.

The combustion cylinder 700 is rotated at the speed | rate of 1 rotation for 1 minute when the flame which blows up becomes large enough to start supply of new fuel pellets, and this is made continuous.

Waste plastics are removed with a demineralizer and then cut to 4 mm or less with a shredder (not shown), and 20-30% of the waste plastics are mixed with chaff or wood waste.

The mixed material is put into a granulator (heated at 320 degrees), compressed to a pressure of about 5 Kg / cm, and formed into pellets of 12 mm diameter.

The pellets are stored in stock silos, then distributed near a boiler equipped with a biofuel combustor and stocked for two to six days.

The stock fuel pellets are pressed into the rotating combustion cylinder 700 and ignited by the ignition device 500 to start combustion.

After 30 to 60 seconds from the start of combustion, the combustion cylinder 700 rotates, and the air heated at 80 ° C to 150 ° C outside the combustion cylinder 700 is transferred to the inside of the combustion cylinder 700 through the nozzle 720. The pellets are sprayed violently by spraying on the pellets which are injected and burned.

This combustion rate is 4050 Kg per hour when the inner diameter of the combustion cylinder 700 is 200 mm, and the high temperature gas ejected from the combustion cylinder 700 becomes about 900-1200 degreeC, and 400,000 50 is calculated. It is ten thousand kilocalorie.

When the water temperature or steam pressure in the boiler equipped with the biofuel combustor reaches a set value, the control unit stops the fuel supply by receiving a signal of a pressure switch or a temperature switch, and then adjusts the amount of combustion air to a minimum value, 700, the inside of the ash is a charcoal state, the gas temperature ejected from the combustion inner cylinder 700 is about 200 ℃. The output of the biofuel combustor is reduced by the capacity of 10-15%.

For this reason, when the water temperature or steam pressure in a boiler falls and it is necessary to make a biofuel combustor high output, the supply of pellet fuel will start first and the blower 650 will start high temperature gas (air) for combustion. ) Is supplied and the gas temperature ejected from the biofuel combustor becomes sufficiently high, and then the operation proceeds to the normal operation.

When the temperature of the hot gas ejected from the fuel combustion device is low even in the operating state, the ignition device 500 using heavy oil operates for a necessary time to assist combustion.

Although A heavy oil is used abundantly for the boiler used as a heat source, emission reduction is calculated | required as an environmental countermeasure for the amount of CO2 which this generate | occur | produces.

For example, A heavy oil is used as fuel for heating boilers such as greenhouses now and estimate when we spread biofuel combustor of the present invention to reduce CO2 emission according to it is 60 tons per 1 farmhouse a year When A-heavy oil is used, and when the heat source conversion by the present invention is carried out, the average CO2 reduction amount reaches 36 tons / year per year, and in the case of supplying 1 million units of the present invention, the total amount of CO2 reductions per year is 36 million tons / year. Has the effect of.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications or variations of the present invention without departing from the spirit and scope of the invention described in the claims below Can be carried out.

DESCRIPTION OF REFERENCE NUMERALS
100: fuel supply unit 200: reduction motor
300: screw 400: supply pipe
500: ignition device 600: combustion outer cylinder
700: combustion inner cylinder 800: reduction motor

Claims

Combustion barrel;
A combustion inner cylinder disposed inside the combustion outer cylinder and rotatably installed with respect to the combustion outer cylinder;
A roller supporting an outer circumferential surface of the combustion inner cylinder;
A blower installed at the combustion outer cylinder to supply hot gas;
A nozzle installed in the combustion cylinder to inject the hot gas into the combustion cylinder;
A fuel supply unit supplying a biofuel;
A supply pipe connecting the fuel supply unit and the combustion inner cylinder;
A screw installed inside the supply pipe;
An ignition device for igniting the biofuel;
And a connecting pipe connecting the ignition device and the combustion inner cylinder and surrounding the supply pipe.

The method of claim 1,
And said blower is inclined with respect to the rotational shaft of said combustion cylinder so as to face the outlet of said combustion cylinder.