KR20170020055A - hypocaust heating apparatus using the biomass - Google Patents

hypocaust heating apparatus using the biomass Download PDF

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Publication number
KR20170020055A
KR20170020055A KR1020150114722A KR20150114722A KR20170020055A KR 20170020055 A KR20170020055 A KR 20170020055A KR 1020150114722 A KR1020150114722 A KR 1020150114722A KR 20150114722 A KR20150114722 A KR 20150114722A KR 20170020055 A KR20170020055 A KR 20170020055A
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KR
South Korea
Prior art keywords
main body
combustion chamber
firebox
opening
fuel
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KR1020150114722A
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Korean (ko)
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KR101741209B1 (en
Inventor
신창화
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주식회사 밸리구들
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Priority to KR1020150114722A priority Critical patent/KR101741209B1/en
Publication of KR20170020055A publication Critical patent/KR20170020055A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/06—Hot-air central heating systems; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated
    • F24D5/10—Hot-air central heating systems; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated with hot air led through heat-exchange ducts in the walls, floor or ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F23B40/06—Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed along the fuel-supporting surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B5/00—Combustion apparatus with arrangements for burning uncombusted material from primary combustion
    • F23B5/02—Combustion apparatus with arrangements for burning uncombusted material from primary combustion in main combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/06—Solid fuel fired boiler

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)

Abstract

According to the present invention, a biomass floor heating apparatus includes: an igniter body having a combustion chamber on the front surface connected to an air injection hole; a heat guide path connected to the combustion chamber of the igniter body; a room floor unit which is rectangular and is connected to the heat guide path; and a chimney installed to be linked to the room floor unit. The biomass floor heating apparatus also includes: a fuel supply unit which is installed on a side of the igniter body in a tilted position, has an opening on the lower end linked to the combustion chamber, and has an opening and closing unit for opening and closing a fuel injection opening formed on the upper or outer peripheral surface; a bypass member in which a connection path connected to the room floor unit on a part connected with the chimney or the chimney is installed; and a preheating path unit including an opening and closing unit installed in bypass member and opening and closing the connection path.

Description

[0001] The present invention relates to a biomass heating apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a combustion device for a sphere, and more particularly, to a biomass gasifier capable of heating biomass by pyrolyzing wood, straw, .

Generally, Ondol heating, which warms the indoor heating space by heating the oven through the fire whistle when the fire is blowing in the oven, is a unique method of Korea and has a close relationship with the lifestyle of the Korean people. Has come.

The heating principle of the ondol is to use heat conduction. By introducing a fire in the flat stones placed under the floor, it is heated by the heat released by the stones that have increased in temperature. In addition to heating by conduction, It also serves.

Such Ondol has advantages such as high efficiency of heat, economical of fuel and facilities, few breakdowns, and the need for frequent maintenance on the structure.

In the house to which the conventional technique is applied, an oven for generating fire is formed by burning wood, and a fire which flows through the oven heats the canopy. And because of the heating of the canopy, the firearms that are stored are spread evenly along the passage of firearms called whales, and the air that has cooled down through the whales is released to the outside through the chimneys.

If you look closely at the spheres in which the circulation path of firearms is formed, you can divide the thin, flat plate, called "ondol stone", on the top and form the floor by applying clay on the top. The robe is placed unrestrained in supporting your ears with small stones on top of the firebricks. Then fill the gaps between the pavement and the pavement with clay, then lay the soil horizontally on the top to form the floor.

Conventionally, whales are formed to communicate with each other in four directions, and the circulation path of the fire is formed to be short, thereby causing a large amount of heat loss. Korean Patent Registration No. 10-0926511 discloses a swiveling sphere.

The rotating spheres are formed in such a shape as to be rotated around the central portion through which the firebox is introduced, while being wrapped around. The spheres are formed in a spiral shape, which has the advantage of lengthening the circulation path of the firebox, but has the following problems.

Korean Utility Model Registration No. 45944 has a lower communication type improvement section, and Utility Model Registration No. 476852 shows a built-in type room for a door.

Meanwhile, the spheres connected to the conventional furnace heat the spheres by passing the heat and smoke generated by burning the firewood and the brush injected into the furnace through the spheres. These fireboxes and spheres are not able to improve the combustion efficiency because unburned incomplete gas is discharged. Particularly, there is a problem that the combustion air for burning wood is supplied through the entrance of the musical instrument, so that the secondary combustion in the rear of the drum is not completely performed.

Korean Patent No. 10-0926511. Korea Utility Model Registration No. 45944.

It is an object of the present invention to provide a heating device for biomass heating which can burn carbonized fuel such as wood, wood, straw and the like, and can activate secondary combustion generated in the rear of the furnace.

It is another object of the present invention to provide a biomass gas heating apparatus capable of continuously supplying fuel supplied through a fuel supply unit and improving operation efficiency.

According to an aspect of the present invention, there is provided an apparatus for heating a biomass gas, comprising: an egg shell body having a combustion chamber communicating with an air inlet; A fire guide path connected to the combustion chamber of the main body of the firebox, a meandering part connected to the fire guide path and forming a serpentine shape, And a chimney installed to communicate with the opening portions. And a fuel supply unit which is inclined at one side of the main body and has an opening at the lower end communicating with the combustion chamber and having a shutoff unit for opening and closing a fuel injection port formed on the outer circumferential surface or the upper surface, And a preheating passage unit provided on the bypass member and including an opening and closing unit for opening and closing the connecting passage.

In the present invention, it is preferable to further include a grate for supporting the fuel introduced from the connection supply unit to a lower portion of the main body of the firebox, and a partition wall protruding at a predetermined height from the bottom surface of the main body of the firebox, Respectively.

And an auxiliary air injection duct for supplying air from the air inlet of the main body to the front of the partition wall in the combustion chamber through the interior of the combustion chamber to activate the secondary combustion. The fuel supply unit includes a plurality of fuel supply units, and the fuel supply unit is inclined so that centers of the openings to which the fuel is supplied are aligned.

The biomass heating apparatus of the present invention can carbonize and burn the fuel supplied from the fuel supply unit while continuously supplying the fuel. By biomassing the biomass inside the combustion chamber of the main body of the furnace, that is, by combusting the combustible gas, have.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view of a biomass heating device according to the present invention,
2 is a cross-sectional view of a biomass hearth heating device according to the present invention,
FIG. 3 is a cross-sectional view illustrating the main body of the egg chamber unit,
4 is a perspective view showing another embodiment of the main body according to the present invention,
FIG. 5 is a sectional view showing another embodiment of the biomass gasifier according to the present invention. FIG.

The biomass heating and heating device for biomass production and combustion according to the present invention can continuously burn and combust wood, straw, grass, etc., household waste, and the like, 4.

Referring to the drawings, a biomass heating apparatus 10 according to the present invention includes an oven main body 20 having a combustion chamber 22 communicating with an air inlet 21 on the front side, An oven unit having a fire inducing passage 30 extending rearward of a space for heating and inclined upwards, a bow portion 40 having a meandering shape combined with the fire inducing passage 30, And a chimney (50) installed to communicate with the openings (40). The fuel chamber 60 is sloped at one side of the main body 20 of the engine and has a combustion chamber and an exhaust port 61 communicating with each other and a fuel storage space 62 is sealed. Or a thermal bypass unit (70) connected to the combustion chambers (40) communicating therewith to control the discharge of heat generated when the fuel is burned in the combustion chamber to induce the discharge of heat from the combustion chamber (30) Respectively.

Hereinafter, the operation of the combustion apparatus 10 according to the present invention will be described in detail.

An oven unit having an oven main body (20) constituting a burning apparatus (10) according to the present invention is installed such that a part thereof is buried in a wall for partitioning a room for heating or is exposed to the living room side, (20) may be formed in a polygonal shape, and the combustion chamber (22) may be formed in a dome shape. A grate 23 is installed on the lower surface of the combustion chamber 22 so as to smoothly discharge the ashes generated after the combustion of fuel such as wood, straw, household waste, and oxygen for combustion. The ashtray (24) can be installed on the lower side of the grate (23) so that the ash can be collected and discharged. The air inlet 21 formed on the front side of the main body 20 may be provided with a diaphragm (not shown) for varying the size of the air inlet 21 to control the amount of air injected. The air inlet 21 may further include a blower 25 for forcibly injecting air for combustion. The upper lip 21a is formed on the main body of the upper part of the air inlet 21 and the lower lip 21b is formed on the main body of the lower part of the air inlet 21. The upper lip 21a, And is formed relatively longer than the lower lip 21b.

A partition wall 26 may be provided in the inner space of the combustion chamber 22 of the main body 20 so as to bypass the heat generated when the fuel is burned and be discharged to the fire induction furnace 30. A skirt member 27 is formed on the ceiling of the main body 20 so as to guide firearms to the front of the partition wall 26 so as to be offset from the partition wall 26. A gap is maintained between the partition 26 and the skirt member 27 so that the fire can be discharged to the fire induction furnace.

The partition wall 26 is formed at a predetermined height from the bottom surface of the front side combustion chamber 22 of the fire inducing furnace 30 so that the burned heat of the combustion chamber 22 passes through the upper side of the combustion chamber 30, To be discharged to the outside.

 The main body 20 is formed with an auxiliary air injection duct 28 formed from an air inlet 21 for activating secondary combustion to the rear side of the combustion chamber 22. The auxiliary air injection duct 28 may be formed on a side surface or a bottom surface of the main body 20.

The main body 20 further includes an ignition unit (not shown) for initially igniting the fuel supplied from the fuel supply unit 60. The ignition unit may be a gas burner for igniting the fuel supplied from the fuel supply unit 60. The main body of the egg can be manufactured and standardized by a metal material, such as a casting, and mass-produced in a factory.

The fuel supply unit 60 can continuously supply the fuel to the combustion chamber 22 and can be supplied by its own weight in the process of burning the fuel, that is, the wood, the brush, the straw, the household garbage, So as to be inclined to the front side of the main body 20. The fuel supply part 60 includes a fuel tank part 63 having a fuel storage space 62 in which fuel is stored and a lower side opening part 61 of the fuel tank part 63 is connected to the upper part of the grate 23 . A fuel inlet 64 is formed in the upper portion of the fuel tank 63. The fuel inlet 64 is formed in the upper portion of the fuel tank 63 so as to prevent the inflow and outflow of air after fuel such as wood, (65).

As shown in FIG. 3, a plurality of the fuel supply units 60 may be provided on the front side of the main body 20. In this case, It is preferable to install it in an inclined manner. A side glass is preferably provided on the outer circumferential surface of the fuel tank portion 62 so that the state of fuel filling in the fuel tank can be known.

The fire induction furnace 30 is connected to the combustion chamber 22 of the main body 20 and extends to the rear side of the bottom surface for heating (away from the main body of the furnace) It gradually becomes narrower and it is desirable to embed the heat transfer at a high speed. A storage material 100 made of gravel and materials for emitting far-infrared rays may be filled around the fire induction furnace 30. [

A fountain bulb 40 is provided on the upper surface of the heat storage material 100. The fountain bulb 40 is connected to the end side of the firebox induction furnace 30 and has a shape of meandering . The fins 40 may be formed of a pipe member through which the heat is passed, and a side plate may be formed on both sides of the side plate and a top plate may be formed on the side plate. However, it is not limited thereto. The openings may be connected to the station guide passage and may be formed in a plurality of openings. The fins 40 are formed in a serpentine shape from the fire inducing furnace 30 to the side of the main body 20 of the furnace, and the outlet side thereof is connected to a chimney 50 installed outside the heating space.

The open bypass unit 70 is connected to the combustion chamber 22 and the outlet side of the chimney 50 or the fins 40 to selectively supply the heat of the combustion chamber 22 to the chimney 50 or the fins 40 so that a suction force can be generated in the fins 40 and the fire inducing furnace 30. The open bypass unit 70 includes a bypass member 72 provided with a connecting passage 71 for connecting to the chimney 50 or a chimney portion connected to the chimney, And a closure part 73 installed on the hinge part 72 for selectively opening and closing the connection channel 71. The opening / closing part 73 comprises a damper having a rotating plate for blocking and communicating the connection passage 71 for shutting off the heat.

The operation of the fuel supply unit according to the present invention having the above-described structure will now be described.

In order to heat by using the combustion device 10 for the spheres according to the present invention, the airtight door 65 formed on the upper side of the fuel tank portion 63 of the fuel supply portion 60 is opened, Timber, straw, or a brush or the like is put into the fuel storage unit 62. [ Then, the closing door 65 is closed to close the fuel inlet 64.

In this state, fuel such as wood, straw, etc. exposed at the opening of the fuel supply unit 60 is ignited by using an ignition device, and air necessary for combustion is supplied through the air inlet 21. In this way, the fuel supplied to the combustion chamber through the opening 61 is burned, and the wood or the wood, which is the fuel stored in the fuel storage portion 60, is pyrolyzed by the heat generated as the fuel is burned, And this combustion gas is burned in the combustion chamber 22. [

At this time, the combustion gas moving to the rear side of the combustion chamber 22 may not be completely burned due to lack of oxygen. The main body 20 is provided with auxiliary air injection ducts The secondary combustion can be activated by supplying oxygen for combustion to the inside of the combustion chamber 22 because air is supplied to the inside of the combustion chamber 22.

As described above, the heat generated when the fuel is burned can not be smoothly discharged through the induction passage 30, the fins 40, and the chimney 50 at an early stage. This phenomenon is due to the fact that the heat storage material 100, the fire inducing furnace 30 and the fins 40 are not sufficiently heated, so that an upward flow due to the chimney effect of the chimney 50 is not generated.

The opening of the combustion chamber 22 may be controlled by operating the opening and closing part 73 for blocking the connection passage 71 of the thermal bypass unit 70 so that the heat of the combustion chamber 22 flows through the connection passage 71 of the bypass member 72, The chimney 50 is discharged through the chimney 50 via the outlet of the duct 40 and maximizes the chimney effect that can be generated as the heated airflow increases. In this process, some of the heat is discharged through the fire inducing furnace 30 and the fins 40.

When the warming-up operation is performed by the fire inducing passage 30, the chimney portion 40 and the chimney 50 due to the above-described operation and the upward force (suction force at the fire inducing furnace side) due to the chimney effect is generated, The connection passage 71 is shut off by using the opening / In this way, the heat in the combustion chamber is discharged through the fireboxes (40) and the chimney (50).

In particular, in the process of being supplied to the combustion chamber 22 through the fuel supply unit 60, the combustion gas is continuously pyrolyzed and combusted and the combustion gas is introduced into the combustion chamber 22 from the rear side of the combustion chamber by the auxiliary air injection duct 28 It can be fully mixed with the supplied air so that secondary combustion can be performed. The heat generated by burning the fuel passes through the fire inducing furnace 30 and the fins 40 and heats the heat storage material and heats the room.

In the meantime, as shown in FIG. 5, the pyong heating unit according to the present invention can be applied to the traditional pyramid system by connecting the fire induction furnace 30 connected with the main body of the pyramid to traditional pyramids. In this case, it is preferable that the fire induction furnace 30 has a short length so as to serve as a whale.

As described above, the combustion device for generating and burning biomass according to the present invention pyrolyzes and burns the fuel supplied through the fuel supply unit, thereby improving the combustion efficiency. Further, the fuel supplied to the fuel supply unit is not required to be supplied while the fuel is being burned, and the outflow of heat from the combustion chamber can be fundamentally prevented.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

The burner for the generation and combustion of biomass of the present invention can be applied to the heating of the hearths, the hearth, the heating of the facility cultivation complex, and the like using the spheres.

Claims (7)

An oven main body having a combustion chamber communicating with an air inlet on the front side; A fire guide path connected to the combustion chamber of the main body of the firebox, a meandering part connected to the fire guide path and forming a serpentine shape, And a chimney installed to communicate with the chambers,
And a fuel supply unit which is inclined at one side of the main body and has an opening at the lower end communicating with the combustion chamber and a closing unit for opening and closing the fuel injection port formed on the outer circumferential surface or the upper surface,
And a preheating passage unit provided on the bypass member and including an opening and closing unit for opening and closing the connection passage, the bypass member being provided with a connecting passage for connecting to the chimney or the chimney, Biomass gas heating. The method according to claim 1,
And a grate for supporting the fuel flowing from the connection and supply unit to a lower portion of the main body of the firebox. In claim 1
And a partition wall protruding at a predetermined height from a lower surface of the inside of the main body of the firebox when burned in the main body of the firebox induction furnace. The method according to claim 1,
Further comprising an auxiliary air injection duct for supplying air from the air inlet of the main body to the front of the partition in the combustion chamber through the interior of the combustion chamber to activate the secondary combustion. The method according to claim 1,
Wherein the fuel supply unit comprises a plurality of fuel supply units and is inclined so that centers of openings through which fuel is supplied to the combustion chambers can be aligned with each other. The method according to claim 1,
Wherein the firebox guide portion is formed in a slanting manner in a direction away from the main body of the firebox and connected to the main body of the firebox in a diagonal shape from the firebox guide path to the main body of the firebox on the upper side of the firebox guide path, Wherein the biomass heating element comprises a plurality of heating elements. An oven main body having a combustion chamber communicating with an air inlet on the front side; And a fuel supply unit provided at an inclined side of the main body and having an opening at the lower end communicating with the combustion chamber and having a shutoff unit for opening and closing a fuel injection port formed on an outer circumferential surface or an upper surface,
A partition wall protruding at a predetermined height from the lower surface of the interior of the main body of the firebox in the front side of the firebox induction furnace, a skirt member provided at the ceiling portion of the main body of the partition front wall for guiding the heat, And an auxiliary air injection duct for supplying secondary air to the partition wall front side of the combustion chamber through the interior of the combustion chamber to activate the secondary combustion.
KR1020150114722A 2015-08-13 2015-08-13 hypocaust heating apparatus using the biomass KR101741209B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210128645A (en) * 2020-04-17 2021-10-27 동명대학교산학협력단 Structure of korean under paneal

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101811750B1 (en) 2017-06-01 2017-12-22 (주)로드텍 A heating apparatus
KR102182085B1 (en) 2019-03-06 2020-11-23 박종래 Hypocaust heating apparatus
KR102134556B1 (en) 2020-03-02 2020-08-03 김도순 the heating system for a korean floor type heater bed

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100926511B1 (en) 2007-09-19 2009-11-12 안진근 A rotating type korean underfloor heating system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101481086B1 (en) * 2014-07-01 2015-01-21 신창화 korean hypocaust improving efficiency of heating

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100926511B1 (en) 2007-09-19 2009-11-12 안진근 A rotating type korean underfloor heating system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
대한민국 실용신안 등록 제 45944호.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210128645A (en) * 2020-04-17 2021-10-27 동명대학교산학협력단 Structure of korean under paneal

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