KR101280857B1 - Combustion apparatus with improved combustion efficiency - Google Patents

Combustion apparatus with improved combustion efficiency Download PDF

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Publication number
KR101280857B1
KR101280857B1 KR1020110073555A KR20110073555A KR101280857B1 KR 101280857 B1 KR101280857 B1 KR 101280857B1 KR 1020110073555 A KR1020110073555 A KR 1020110073555A KR 20110073555 A KR20110073555 A KR 20110073555A KR 101280857 B1 KR101280857 B1 KR 101280857B1
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South Korea
Prior art keywords
combustion
air
fuel
chamber
supplied
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KR1020110073555A
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Korean (ko)
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KR20130012390A (en
Inventor
김상권
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김상권
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F23B40/04Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed from below through an opening in the fuel-supporting surface
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00Combustion apparatus using only lump fuel
    • F23B1/16Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B60/00Combustion apparatus in which the fuel burns essentially without moving
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/10Under-feed arrangements
    • F23K3/14Under-feed arrangements feeding by screw
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23MCASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00Casings; Linings; Walls
    • F23M5/08Cooling thereof; Tube walls

Abstract

Combustion apparatus according to the present invention has a combustion cylinder for burning the fuel supplied by the fuel supply unit coupled to the lower side receiving the combustion air from the outside, and discharges the combustion gas generated by the combustion of the fuel to the boiler to heat A recovery apparatus for recovering heat, comprising: a cylindrical combustion chamber surrounded by an inner wall in the combustion cylinder for burning fuel supplied to a lower portion thereof, and an outer wall on which an outside of the combustion cylinder is provided with a combustion air supply port for supplying combustion air from the outside; Is provided with the combustion air supplied through the combustion air supply port formed in the tangential direction of the cylindrical outer wall while turning down the side combustion air supply chamber which is supplied to the combustion chamber to the open lower portion, and installed above the side combustion air supply chamber It is formed in the space between the upper inner wall and the upper outer wall, the upper outer wall is provided with an air duct The upper inner wall is provided with a plurality of air nozzles are installed in the circumferential direction and inclined upward in the discharge direction of the combustion gas by the combustion of fuel, the combustion air supplied from the outside through the air duct through the air nozzle It is characterized in that it comprises an upper combustion air supply chamber that is supplied upward into the combustion chamber to ensure a stable combustion of the secondary combustion and the smooth discharge of the combustion gas to the boiler at the same time to ensure a stable heat recovery.

Description

Combustion apparatus with improved combustion efficiency {COMBUSTION APPARATUS WITH IMPROVED COMBUSTION EFFICIENCY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus for heat recovery, and more particularly, to a heat recovery combustion apparatus for recovering heat from a combustion gas generated by burning a solid fuel or the like in a combustion chamber and using it as energy.

In general, in industrial facilities that require industrial hot water, steam, or hot gas, a combustion device is used to generate thermal energy by igniting and burning fuel in a combustion cylinder to obtain thermal energy. As such, solid fuels such as RDF fueled with domestic waste or RPF fueled with waste plastics are widely used in terms of economic efficiency and resource recycling.

By the way, the conventional combustion device is a way to put a large amount of solid fuel, etc. in the lower part of the combustion cylinder and combusts, but the fuel is incompletely burned, resulting in waste of materials as well as low thermal efficiency, many ashes at once (re) This is cumbersome because it is impossible to automate the remaining ash processing, and once combustion is completed, continuous combustion is difficult and the calorific value is not uniform, such as ignition after a certain amount of fuel is input again.

In addition, the solid fuel has a problem in that a large amount of gas or particles that pollute the environment, such as dust, carbon monoxide, soot, gaseous HCL, SOx, NOx, dioxin during combustion.

In order to solve this problem, the combustion apparatus 1000 of FIG. 1 has been developed. The heat recovery combustion apparatus 1000 according to the related art generates a high temperature combustion gas by burning the solid fuel supplied from the fuel hopper 310 in the combustion cylinder 100. The air cooling chamber 150, the passage 140a of the middle wall 140, the swirl flow supply chamber 130, and the passage 120a of the inner wall 120 are supplied to the combustion chamber 110.

In addition, the high temperature combustion gas generated by burning the fuel in the combustion chamber 110 is supplied to a heat recovery means such as a boiler through the elbow-shaped combustion gas discharge pipe 400 to recover heat.

By the way, in the conventional combustion apparatus, combustion air is supplied only to the outside of the solid fuel loaded in the combustion chamber, so that the outer portion of the solid fuel is well burned, but the solid fuel therein is difficult to contact with the combustion air, resulting in incomplete combustion. There was this. In addition, the fuel accumulated only up and then flowed down and the fuel that could not escape to the outside was a problem to become a clinker to prevent combustion. In addition, since the inner wall of the combustion chamber is continuously exposed to a high temperature combustion gas, deformation or cracking occurs during long-term use, which results in a poor durability.

The present invention has been made to solve the problems of the prior art to achieve the complete combustion of the solid fuel loaded in the combustion chamber to improve the combustion efficiency and smoothly supply the combustion gas to the boiler to improve the heat recovery rate and improved durability It is an object to provide a combustion device.

Combustion apparatus according to the present invention has a combustion cylinder for burning the fuel supplied by the fuel supply unit coupled to the lower side receiving the combustion air from the outside, and discharges the combustion gas generated by the combustion of the fuel to the boiler to heat A recovery apparatus for recovering heat, comprising: a cylindrical combustion chamber surrounded by an inner wall in the combustion cylinder for burning fuel supplied to a lower portion thereof, and an outer wall on which an outside of the combustion cylinder is provided with a combustion air supply port for supplying combustion air from the outside; Is provided with the combustion air supplied through the combustion air supply port formed in the tangential direction of the cylindrical outer wall while turning down the side combustion air supply chamber which is supplied to the combustion chamber to the open lower portion, and installed above the side combustion air supply chamber It is formed in the space between the upper inner wall and the upper outer wall, the upper outer wall is provided with an air duct The upper inner wall is provided with a plurality of air nozzles are installed in the circumferential direction and inclined upward in the discharge direction of the combustion gas by the combustion of fuel, the combustion air supplied from the outside through the air duct through the air nozzle It is characterized in that it comprises an upper combustion air supply chamber that is supplied upward into the combustion chamber to ensure a stable combustion of the secondary combustion and the smooth discharge of the combustion gas to the boiler at the same time to ensure a stable heat recovery.

In addition, the upward angle with respect to the horizontal of the air nozzle is preferably 5 degrees to 60 degrees.

In addition, the air nozzle is a first stage air nozzle is installed in a plurality in the circumferential direction from the upper inner wall, and the second stage air nozzle is installed in the circumferential direction in the upper inner wall is vertically spaced from the first stage air nozzle is stacked It is characterized by consisting of a multi-stage structure.

In addition, the first stage air nozzle and the second stage air nozzle are characterized in that the upward angle with respect to the horizontal is formed differently to facilitate the secondary combustion of the incomplete combustion and the smooth discharge of the combustion gas to the boiler at the same time.

In addition, the air nozzle is characterized in that it is installed at an angle with respect to the center direction of the upper inner wall of the circle on a plane.

According to the present invention, the combustion efficiency is improved by perfect combustion of the solid fuel loaded in the combustion chamber, and the combustion gas is smoothly supplied to the boiler to improve the heat recovery rate and the durability is improved.

1 is a view showing a combustion apparatus according to the prior art,
2 is a view showing a combustion apparatus according to the present invention,
Figure 3 is an enlarged side view of the combustion cylinder in Figure 2,
4 is a plan view of the combustion cylinder in FIG.
FIG. 5 is an enlarged view of the fuel supply unit of FIG. 2.

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

Figure 2 is a view showing a combustion apparatus according to the present invention, Figure 3 is an enlarged side view of the combustion cylinder in Figure 2, Figure 4 is a plan view of the combustion cylinder in Figure 2, Figure 5 is a fuel supply in Figure 2 This is an enlarged drawing.

Combustion apparatus according to a preferred embodiment of the present invention comprises a combustion cylinder 10 having a combustion chamber 11 for burning fuel therein, and a fuel supply unit 20 for supplying fuel into the combustion chamber 11. .

First, the combustion cylinder 10 has a cylindrical shape as shown in FIG. 2 to receive and combust solid fuel therein. The combustion chamber 11 is surrounded by an inner wall 12 in the combustion cylinder 10 to combust fuel. ), A cooling chamber 13 for cooling the inner wall 12 of the combustion chamber 11, and a side combustion air supply chamber formed on the side of the combustion chamber 11 for supplying combustion air from the outside to the combustion chamber 11 ( 15) is made.

The cooling chamber 13 is for lowering the temperature of the inner wall 12 that is in continuous contact with the hot combustion gas, and as shown in FIGS. 2 and 3, the inner wall 12 of the cylinder whose inner diameter is narrowed toward the upper portion thereof. Cooling water outlet 14b and cooling water inlet 14a are formed in a space between the inner wall 12 and the inner wall 12 spaced apart from the outside, and the coolant flows in and out of the upper and lower sides of the middle wall 14. . The cooling water inlet 14a is formed in the tangential direction of the cylindrical middle wall 14. A cooling water guide plate 13a formed in a spiral shape is provided inside the middle wall 14 of the cooling chamber 13 so that the cooling water introduced through the cooling water inlet 14a is rotated along the cooling water guide plate 13a And flows out through the cooling water outlet 14b formed on the upper side of the middle wall 14. The cooling water flowing out through the cooling water outlet 14b flows into the boiler 50 for use in recovering heat from the high temperature combustion gas generated in the combustion chamber 11 through a connection pipe (not shown), thereby improving the heat recovery rate have.

The side combustion air supply chamber 15 is formed in a space between the outer wall 16 and the middle wall 14 spaced apart from the middle wall 14 and air for supplying combustion air from the outside to the upper side of the outer wall 16. The supply port 16a is formed and the lower part 12a is open. The air supply port 16a is formed in the tangential direction of the cylindrical outer wall 16 so that the supplied combustion air descends inside the side combustion air supply chamber 15 and then into the combustion chamber 11 through the opened lower portion 12a. It is supplied by turning.

In addition, an upper combustion air supply chamber 30 for supplying combustion air from the upper side is formed around the upper portion of the combustion chamber 11. The upper combustion air supply chamber 30 is coupled to the upper side of the cooling chamber 13 and the side combustion air supply chamber 15 by the flange 18, and the upper inner wall 33 of the cylinder surrounding the upper inner side of the combustion chamber 11. ) And an upper outer wall 31. In addition, the upper outer wall 31 is provided with an air duct 32 for supplying combustion air from the outside to the upper combustion air supply chamber 30, and the upper inner wall 33 from the upper combustion air supply chamber 30 to the combustion chamber 11 A plurality of air nozzles 34 are provided in the circumferential direction of the upper inner wall 33 to supply combustion air to the upper part.

As shown in FIG. 4, two air ducts 32 are installed on the upper outer wall 31 so as to face each other, and are installed at a predetermined angle in a circular center direction of the upper outer wall 31 to the entire upper combustion air supply chamber 30. The combustion air is smoothly supplied.

The air nozzle 34 is installed to be inclined upward in the discharge direction of the combustion gas from the upper inner wall 33, as shown in FIG. The preferred upward angle α of the air nozzle 34 is preferably 5 degrees to 60 degrees. The upward angle α is selected by appropriately controlling the combustion effect of the combustion gas into the boiler and the secondary combustion of the incomplete combustion product.

As such, the air nozzle 34 is installed to be inclined upward so that incomplete combustion products contained in the combustion gas are secondaryly burned and the combustion gas is smoothly supplied to the boiler. This combustion device is a heat recovery combustion device, if the combustion gas is not smoothly supplied to the boiler may cause a problem that the heat recovery rate is lowered, this point is important.

In addition, the air nozzle 34 is vertically spaced apart from the first stage air nozzle 34a and a plurality of first stage air nozzles 34a installed in the circumferential direction on the upper inner wall 33, as shown in FIG. And a multistage structure in which a plurality of two-stage air nozzles 34b are installed on the upper inner wall 33 in the circumferential direction, and an upward angle of the one-stage air nozzles 34a and the two-stage air nozzles 34b ( α) is formed differently, in this embodiment, the upward angle α of the second stage air nozzle 34b is larger than that of the first stage air nozzle 34a. In this embodiment, the upward angle α of the second stage air nozzle 34b is formed larger than that of the first stage air nozzle 34a, so that the upward angle α of the first stage air nozzle 34a is small and reaches the center of the combustion chamber. By supplying combustion air, the secondary combustion effect of the incomplete combustion product is further promoted, and the second stage air nozzle 34b has a larger upward angle α to further discharge the combustion gas to the boiler. Therefore, the multi-stage structure with the different up angles of the present invention has the effect of ensuring two functions more reliably than the single-stage structure.

In addition, the air nozzle 34 is installed at an angle at a predetermined horizontal angle β in the center direction of the circular upper inner wall in a plane as shown in FIG. 4 to form combustion air above the combustion chamber 11. It is then supplied to help the incomplete combustion as it rotates along the upper inner wall to help complete combustion due to secondary combustion. The horizontal angle β of the air nozzle 34 is preferably 5 degrees to 60 degrees. In the present invention, the air nozzle 34 is installed to rotate the combustion air clockwise, but may be installed to rotate counterclockwise. . Further, the horizontal angle β of the first stage air nozzle 34a and the second stage air nozzle 34b may be formed differently. In this embodiment, the horizontal angle β of the first stage air nozzle 34a is made larger. By forming more rotary air of the combustion air, the secondary combustion effect of the incomplete combustion product is more effective. The second stage air nozzle 34b has a smaller horizontal angle β, which is more suitable for the combustion of the combustion gas into the boiler. The effect is to promote further emissions.

On the other hand, the upper part of the combustion cylinder 10 is opened to discharge the combustion gas at a high temperature, and the discharged high temperature combustion gas is supplied to a boiler (not shown) through a combustion gas discharge pipe And the boiler recovers heat from the high temperature combustion gas to obtain high temperature steam and the like.

A rotary grate 17 is provided below the combustion chamber 11 to be rotatable. The rotary grate 17 is a circular plate for burning the solid fuel supplied to the upper surface thereof. The rotary grate 17 is tilted downward from the center in the outward direction and then upwardly inclined so that both cross sections are formed in a V-shape. At the center of the rotary grate 17, a fuel supply part 20 for supplying solid fuel is formed.

As shown in FIG. 3, the fuel supply unit 20 is vertically installed at the lower center of the lower part of the combustion cylinder 10, and a fuel supply port 24 is formed at one lower side thereof, and the solid fuel is supplied to the combustion chamber by the transfer screw 22 therein. (11) is provided with a fuel supply pipe 21 for supplying into the inside, the outer side of the fuel supply pipe 21 is larger in diameter than the fuel supply pipe 21 and formed in a concentric shape and burned by air supply means 25 such as a ring blower The lower combustion air supply pipe 23 for supplying air into the combustion chamber 11 from the combustion chamber 11 is formed.

The fuel supply pipe 21 is formed at an upper portion thereof with a large diameter portion 21a protruding into the combustion chamber 11 and gradually increasing in diameter toward the upper side and a downwardly inclined downwardly sloping end portion of the large diameter portion 21a, 17 are guided to the upper surface of the guide portion 21b. The large diameter portion 21a is formed with a large number of air supply nozzles 21c through which the combustion air supplied from the lower combustion air supply pipe 23 flows in the circumferential direction.

The upper end portion protruding from the lower combustion air supply pipe 23 into the combustion chamber 11 is provided with an air supply enlarged diameter portion 23a whose diameter gradually increases toward the upper side and parallel to the lower side of the enlarged diameter portion 21a of the fuel supply pipe 21 And the end of the air supply large diameter portion 23a is closed by the inclined guide portion 21b of the fuel supply pipe 21. [ The combustion air supplied through the lower combustion air supply pipe 23 is guided by the supply airflow portion 23a to be supplied to the fuel supply pipe 21 via the air supply nozzle 21c formed in the enlarged diameter portion 21a of the fuel supply pipe 21, As shown in FIG.

The feed screw 22 installed in the fuel supply pipe 21 to transfer fuel into the combustion chamber is composed of a screw shaft 22d and a screw blade 22e in a spiral shape on the screw shaft 22d. A horizontal fuel supply member 22a, which is axially coupled to the screw shaft 22d and rotates together, is provided at an upper end of the screw shaft 22d. The horizontal fuel supply member 22a includes an extension shaft portion 22f extending outward from the fuel supply pipe 21 and protruding into the combustion chamber 11 and axially coupled to the upper end of the screw shaft 22d, A radial fuel supply member 22b formed on the outer peripheral surface of the extension shaft portion 22f and a fuel height adjustment bracket 22c coupled to the upper end of the extension shaft portion 22f.

The radial fuel supply member 22b protrudes perpendicularly to the outer circumferential surface of the extension shaft portion 22f, extends in the axial direction, and rotates with the screw shaft 22d so as to raise fuel that rises through the fuel supply pipe 21 by the combustion chamber 11. ) To be supplied radially, so that the solid fuel supplied from the fuel supply pipe 21 is constantly supplied radially into the combustion chamber 11 by the radial fuel supply member 22b to the air supply nozzle 21c. clinker).

A fuel height adjusting bracket 22c is provided at an upper end of the extending shaft portion 22f protruding into the combustion chamber 11 and perpendicular to the axial direction. As shown in Figs. 2 and 5, the fuel height adjustment bracket 22c is conical and the lower portion is formed larger than the diameter of the extension shaft portion 22f so that the fuel can be pushed out without continuing to the upper portion. By appropriately adjusting the height of the fuel loaded on the enlarged diameter portion 21a and the upper part of the grate 17 of the combustion chamber 11, complete combustion of the fuel is achieved.

On the other hand, at the lower edge of the combustion cylinder 10, a redistribution outlet 19 is formed so that ashes of the solid fuel burned are formed, and an upper flange 18 having a combustion air outlet (not shown) is coupled to the upper edge thereof. Is formed.

On the other hand, although not shown in the figure, the fuel supply pipe to supply the combustion air through the fuel supply pipe 21 to prevent backfire from the solid fuel burned in the combustion chamber 11 to the solid fuel existing in the fuel supply pipe 21. The other side of the lower part of the 21 may be provided with an air supply means such as a ring blower.

The solid fuel is supplied to the rotatable grate 17 by the fuel supply pipe 21 and the bottom surface of the solid fuel is supplied through the air supply nozzle 21c formed in the enlarged diameter portion 21a of the fuel supply pipe 21, The combustion air is directly supplied to the combustion chamber.

Hereinafter will be described a method of operating a combustion apparatus according to an embodiment of the present invention configured as described above.

First, the solid fuel supplied from the fuel hopper (not shown) is supplied into the combustion chamber 11 by the transfer screw 22 installed in the fuel supply pipe 21. The solid fuel injected into the combustion chamber 11 from the transfer screw 22 The radial fuel supply member 22b of the horizontal fuel transfer member 22a rotates together with the screw shaft 22d to supply the rising fuel radially and constantly into the combustion chamber 11. [ Since the fuel supply unit 20 has such a configuration, the light fuel having small particles is combusted while rising by the combustion air coming from the air supply nozzle 21c, and the relatively heavy fuel is fueled by the radial fuel supply member 22b. 21) Constantly supplied radially into the surrounding combustion chamber 11 to prevent the clinker from being caught in the air supply nozzle 21c. As a result, in the present invention, the fuel continues to accumulate in the upper part of the conventional fuel supply pipe, and the contact area with the combustion air decreases, and the fuel is incompletely burned. It is possible to solve the problem of interference.

The solid fuel thus supplied into the combustion chamber 11 is preheated and ignited and burned by the preheating burner and the ignition burner (not shown). The solid fuel supplied to the upper side of the rotating grate 17 is moved to the edge of the rotating grate 17 over time due to the continuous supply of fuel while being burned and at the edge of the rotating grate 17, Is discharged through the cultivation outlet (19) while the rotary grate (17) is rotated.

On the other hand, the solid fuel is combusted in the combustion chamber 11 and the cooling water flows in through the cooling water inlet 14a of the cooling chamber 13 formed on the outer periphery of the inner wall 12 and the introduced cooling water flows through the cooling water guide plate 13a, The cooling water flows out through the cooling water outlet 14b after the inner wall 12 is cooled. Then, the cooling water exiting from the cooling chamber (13) flows into the boiler (50), and heat is recovered from the high temperature combustion gas by heat exchange. As described above, according to the present invention, the cooling chamber 13 is provided on the outer circumference of the inner wall 12 to prevent the durability of the inner wall 12 of the combustion chamber 11 from being excessively increased due to the temperature rise, The heat is recovered from the high-temperature combustion gas introduced into the boiler 50 after the preheating, and then the internal wall 12 of the combustion chamber 11 is continuously exposed to the high-temperature combustion gas, Or deterioration in durability due to cracks or the like can be prevented, and unnecessary heat loss can be prevented and the thermal efficiency can be further improved.

And, the combustion air required to burn the solid fuel is supplied to the combustion chamber 11 through the side combustion air supply chamber 15, the upper combustion air supply chamber 30 and the lower combustion air supply pipe 23 from the outside, first, the side combustion In the air supply chamber 15, the lower part 12a opened after the combustion air supplied through the air supply port 16a tangentially formed on the upper portion of the circular outer wall 16 is turned down inside the side combustion air supply chamber 15. It is supplied into the combustion chamber 11 through. Therefore, since the combustion air is supplied while rotating in the side combustion air supply chamber 15 at the side of the combustion chamber 11, even if the combustion chamber 11 is smaller than when the combustion air is linearly supplied to the fuel, Thereby making it possible to improve the thermal efficiency while lowering the manufacturing cost.

The combustion air supplied to the upper combustion air supply chamber 30 and the combustion air supplied to the upper combustion air supply chamber 30 through the air duct 32 formed obliquely on the circular upper outer wall 31 is an air nozzle 34 having a two-layer structure. It is supplied to the upper portion of the combustion chamber (11) through. At this time, the air nozzle 34 is installed at an angle β on the plane from the circular upper inner wall and installed obliquely upward, and is inclined upwardly so that the combustion air is supplied to the upper part of the combustion chamber 11 while forming a rotary airflow, so that the incomplete combustion product is in the upper inner wall. As it rotates along, it helps to be completely burned out by the secondary combustion, and at the same time, it helps to increase the combustion gas to be smoothly supplied to the boiler. This combustion device is a combustion device for heat recovery, and if the combustion gas is not supplied to the boiler smoothly, the heat recovery rate may drop. This is important in this device. There are advantages to it.

In addition, the combustion air supplied by the side combustion air supply chamber 15 directly burns the solid fuel loaded on the grate 17, and the combustion air supplied by the upper combustion air supply chamber 20 does not completely burn and rises. It plays a role of combusting incomplete combustion product to achieve complete combustion of fuel.

Next, the combustion air is injected by the lower combustion air supply pipe 23, and the combustion air supplied by the lower combustion air supply pipe 23 formed on the outside of the fuel supply pipe 21 of the fuel supply pipe 21 is described. Solid fuel existing in the lower part and the interior as well as the outside of the solid fuel loaded by supplying combustion air to the lower portion of the solid fuel supplied through the air supply nozzle 21c formed in the enlarged diameter portion 21a and loaded in the combustion chamber 11. In addition, it burns smoothly and improves combustion efficiency.

As mentioned above, although the combustion apparatus of this invention was demonstrated with reference to the preferable embodiment, this invention is not limited to this, The person skilled in the art is various-modified within the range which does not deviate from the summary of this invention described in the claim below. It will be readily understood that this is possible.

10: combustion cylinder 11: combustion chamber
12: inner wall 13: cooling chamber
14: middle wall 16: outer wall
17: Rotating grate 20: Fuel supply
21: fuel supply pipe 22: feed screw

Claims (14)

  1. A burner for burning fuel supplied from a fuel supply unit coupled to a lower portion by receiving combustion air from the outside and discharging the combustion gas generated by the combustion of fuel to a boiler to recover heat; As a result,
    A cylindrical combustion chamber surrounded by an inner wall of the combustion cylinder to burn fuel supplied to a lower portion thereof,
    The outer wall of the combustion cylinder is provided with an outer wall which is formed with a combustion air supply port for supplying combustion air from the outside, the combustion air supplied through the combustion air supply port formed in the tangential direction of the cylindrical outer wall is turned down while turning down and opened. A side combustion air supply chamber supplied in the combustion chamber to the lower side;
    Is installed in the upper side of the side combustion air supply chamber, is formed in the space between the upper inner wall and the upper outer wall, the upper outer wall is provided with air ducts, the upper inner wall is provided with a plurality in the circumferential direction and the combustion gas by combustion of fuel The air nozzle is provided to be inclined upward in the discharge direction of the air, the combustion air supplied from the outside through the air duct is supplied upward into the combustion chamber through the air nozzle to smooth the secondary combustion of the incomplete combustion and the combustion gas to the boiler. Including the upper combustion air supply room to ensure a stable heat recovery rate by simultaneously discharging,
    The air nozzle is a multi-stage structure in which a plurality of single stage air nozzles are installed in the circumferential direction on the upper inner wall, and two stage air nozzles are installed in the circumferential direction on the upper inner wall and vertically spaced from the first stage air nozzle. Structured,
    The 1st stage air nozzle and the 2nd stage air nozzle are formed in a different upward angle with respect to the horizontal combustion apparatus to improve the combustion efficiency to facilitate the secondary combustion of the incomplete combustion and the smooth discharge of the combustion gas to the boiler at the same time.
  2. The method of claim 1,
    An upward angle of the air nozzles with respect to the horizontal is 5 to 60 degrees combustion efficiency improved combustion apparatus.
  3. delete
  4. delete
  5. The method of claim 1,
    And the air nozzles are installed at an angle with respect to the center direction of the upper inner wall in a plane at an angle, and the combustion efficiency is improved.
  6. The method of claim 5,
    Combustion efficiency improved combustion apparatus wherein the angle formed by the air nozzles in the plane with respect to the central direction of the upper inner wall of the circle is 5 to 60 degrees.
  7. delete
  8. The method according to claim 6,
    The first stage air nozzle and the second stage air nozzles are formed at different angles with respect to the center of the upper inner wall, respectively, so that the combustion efficiency is improved and the secondary combustion of the incomplete combustion and smooth discharge of the combustion gas to the boiler at the same time.
  9. delete
  10. The method of claim 1,
    The fuel supply unit includes a fuel supply pipe that is installed perpendicular to the lower portion of the combustion cylinder to guide the fuel into the combustion chamber, and a transfer screw installed in the fuel supply pipe to transfer the fuel into the combustion chamber,
    On the upper end of the transfer screw, an extended shaft portion which is axially coupled to the upper end of the screw shaft of the transfer screw and extends outwardly of the fuel supply pipe and protrudes into the combustion chamber, and protrudes perpendicularly to the outer circumferential surface of the extended shaft part to provide the fuel supply pipe. And a horizontal fuel transfer member comprising a radial fuel supply member for radially supplying fuel that is raised through the fuel into the combustion chamber.
  11. The method of claim 10,
    The combustion device is improved combustion efficiency is installed on the upper end of the extended shaft portion, the fuel height adjustment bracket is provided with a lower portion coupled to the extension shaft portion larger than the diameter of the extended shaft portion.
  12. The method of claim 1,
    Cooling water introduced into the space between the inner wall and the middle wall of the combustion chamber through the cooling water inlet is provided on the inside of the side combustion air supply chamber, the cooling water inlet and the cooling water inlet is formed in the upper and lower, respectively, the cooling water outlet and inlet And a cooling chamber formed outside the circumference of the combustion chamber so as to cool the inner wall.
  13. The method of claim 12,
    And a cooling water discharged from the cooling water outlet of the cooling chamber is supplied to the boiler and used for heat recovery.
  14. The method of claim 13,
    The combustion apparatus of the combustion efficiency is improved in the cooling chamber is provided with a spiral cooling water guide plate so that the cooling water flowing from the cooling water inlet ascending as it rises.
KR1020110073555A 2011-07-25 2011-07-25 Combustion apparatus with improved combustion efficiency KR101280857B1 (en)

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KR101503298B1 (en) * 2013-08-27 2015-03-18 김상권 Combustion apparatus
KR101710662B1 (en) * 2014-12-26 2017-02-27 에너원 주식회사 System for recovering discharged steam in a combustion apparatus
KR101900998B1 (en) 2015-06-18 2018-09-20 주식회사 엘지화학 Lightweight cooling plate, battery module comprising the same and fabricating method thereof
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