KR101389749B1 - Boiler - Google Patents

Abstract

The present invention relates to a wood pellet boiler of high efficiency, eco-friendly, and more particularly, a combustion furnace having an inlet and an exhaust; It is provided inside the combustion furnace, and comprises a fixed frame having a guide portion, and the drying section, pre-combustion portion, the main combustion portion and the post-combustion portion is arranged in sequence to be arranged in series, spaced apart from each other, Combustion means; And a conveying frame arranged below the grate and supported by the guide part, a driving part connected to the conveying frame to transmit power, and arranged between the grate connected to the conveying frame. And conveying means including push plates for pushing the combustion products stacked on the upper part to the grate positioned at the lower end thereof.
Therefore, in the present invention, the multi-stage lattice is sequentially arranged into a drying unit, a pre-combustion unit, a main combustion unit, and a post-combustion unit, thereby enabling complete combustion through several stages of the combustion process, and by means of the conveying means, It is possible to simultaneously transfer the combustion products from the combustion stage to the next combustion stage, thereby eliminating the deviation of combustion products from each combustion stage. .

Description

Eco-friendly high efficiency wood pellet boiler {BOILER}

The present invention relates to an eco-friendly high-efficiency wood pellet boiler, and more specifically, the multi-stage lighters are sequentially arranged into a drying unit, a pre-combustion unit, a main combustion unit, and a post-combustion unit, thereby completely burning through several stages of combustion process. It is also possible to simultaneously transfer the combustion products from each combustion stage to the next combustion stage of the grate by the transfer means to eliminate the deviation of the combustion products in each combustion stage, thereby maximizing thermal efficiency by minimizing heat loss. It is characterized by.

Conventional wood chips or boilers for burning solid fuel are disclosed in the Republic of Korea Patent No. 10-0898175 (2009.05.11. Hereinafter 'prior art') "incineration boiler".

The prior art is provided on one side top of the incineration boiler, the raw material is crushed when the input is crushed, and is provided in the lower portion of the crusher, a hopper for smoothly supplying the raw material to the drying unit, and is provided on one side of the hopper, In the process of passing through the inside of the upper body is a multi-stage drying unit for transporting and drying the raw material to one side, provided in the lower body of the lower portion of the drying unit, a combustion unit for burning the dried raw material, and the lower body The lower portion is provided with a discharge portion for discharging the burned ash to the outside.

That is, the prior art has the advantage that it is possible to increase the combustion efficiency in that the drying unit is composed of a multi-stage sterilization, it is configured to dry the moisture,

Combustion part is made of a single structure has a disadvantage that takes a lot of time because it has to ensure enough time to completely burn all the fuel.

In addition, the prior art is a multi-stage drying unit has a transfer screw is built in the drying tube is configured to transfer the fuel to supply to the combustion unit, the fuel supplied to the combustion unit is not supplied at a time, the transfer deviation occurs, thereby There is a problem of prolonging the combustion time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

The multi-stage graders are arranged in the drying unit, pre-combustion unit, main combustion unit and post-combustion unit in order to achieve complete combustion through several stages of combustion process, and also to transfer the next stage in each combustion stage of the grate by the transfer means. Combustion can be simultaneously transferred to the combustion stage, thereby eliminating fluctuations in the transfer of the combustion products in each combustion stage, thereby minimizing heat loss, thereby maximizing thermal efficiency.

In addition, the present invention is provided with an external air inlet passage for communicating air to communicate with the outside to supply the combustion air, and at the same time a plurality of vents in communication with the external air inlet passage is formed on the grate or the plate, or both It is another object of the present invention to accelerate combustion speed by directly supplying combustion air into a passage through a vent.

Environmentally friendly wood pellet boiler according to the present invention comprises a combustion furnace having an input and an exhaust; It is provided inside the combustion furnace, and comprises a fixed frame having a guide portion, and the drying section, pre-combustion portion, the main combustion portion and the post-combustion portion is arranged in sequence to be arranged in series, spaced apart from each other, Combustion means; And a conveying frame arranged below the grate and supported by the guide part, a driving part connected to the conveying frame to transmit power, and arranged between the grate connected to the conveying frame. And conveying means including push plates for pushing the combustion products stacked on the upper part to the grate positioned at the lower end thereof.

The guide portion according to the invention is connected to the fixed frame, consisting of a guide roller having a contact roll on the inside,

The transfer frame is characterized in that the guide bar is further provided on the contact roll of the guide roller.

The conveying means according to the present invention is characterized in that it further comprises a support rod connected to both sides of the mill plates, the support bar is arranged upright, the support rod is spanned.

Side walls are connected to both sides of the fixing frame according to the present invention, the side walls are in close contact with both sides of the inner wall surface of the combustion furnace and the grate,

The outside of the grate is further provided with an external air inflow passage communicating with the outside,

The grate or the plates, or all of them are further provided with a plurality of vent holes communicating with the outside air inflow passage.

Eco-friendly high-efficiency wood pellet boiler according to the present invention is a multi-stage lighters are sequentially arranged in the drying unit, pre-combustion unit, the main combustion unit and the post-combustion unit to enable complete combustion through a multi-stage combustion process,

In addition, it is possible to simultaneously transfer the combustion products from each combustion step of the grate to the next combustion step by the transfer means to eliminate the transfer deviation of the combustion products in each combustion step, thereby maximizing the thermal efficiency by minimizing the heat loss.

In addition, the present invention is provided with an external air inlet passage for communicating air to communicate with the outside to supply the combustion air, and at the same time a plurality of vents in communication with the external air inlet passage is formed on the grate or the plate, or both Combustion air flowing into the passage can be directly supplied to the combustion products through the air vents to accelerate the combustion speed.

1 is a plan view showing an eco-friendly high efficiency wood pellet boiler according to the present invention,
2 is a side view and a front view showing an eco-friendly high efficiency wood pellet boiler according to the present invention,
3 is a plan view, a side view and a front view showing a combustion means and a transfer means of the boiler according to the present invention;
4 and 5 are a cross-sectional view and a conceptual view showing another modification of the boiler according to the present invention.

Hereinafter, with reference to the accompanying drawings, an eco-friendly high efficiency wood pellet boiler according to the present invention.

When referring to the direction reference used in the present specification with reference to the accompanying Figure 1,

First, the side provided with the input of the combustion furnace is called 'rear', and the side provided with the exhaust part of the combustion furnace is designated as 'forward'.

In addition, the combustion products in the present specification include wood chips, sawdust (including wood cut small), livestock droppings, rice hulls, pellets and solid fuel,

In addition, it refers to a comprehensive concept that includes the generation of combustion heat as various types of materials to be disposed of.

As shown in Figures 1 to 3 of the environmentally friendly wood pellet boiler according to the present invention

A combustion furnace 10 having an input unit 11 and an exhaust unit 12; It is provided in the combustion furnace 10, the fixed frame 21 having a guide portion 22, and connected to the fixed frame 21, the drying unit (D), pre-combustion unit (C1), main combustion unit Combustion means (20) comprising a multi-stage (C2) and the post-combustion unit (C3) arranged in sequence, spaced apart from each other formed grate 23; And a transfer frame 31 arranged below the grate 23 and supported by the guide unit 22, a driving unit 33 connected to the transfer frame 31 to transmit power, and the transfer. Transport means connected to the frame 31 and arranged between the grate 23, the transport means including a push plate 35 for pushing the combustion products stacked on the grate 23 to the grate 23 located at the bottom 30, including.

As shown in Figure 1 and 2 the combustion furnace 10 according to the present invention is

It is formed in the inner space surrounded by the fire-resistant wall (1) to be built on the base frame 2 to provide a space for the combustion of wood chips or pellet-shaped solid fuel, which is a combustion product.

In addition, the combustion furnace 10 includes an input unit 11 for inputting a combustion product and an exhaust unit 12 for discharging the combustion gas generated when the wood chip or the solid fuel is burned.

The input part 11 is formed through the rear fireproof wall 1 and arranged behind the combustion furnace 10,

The input unit 11 is provided with a screw conveyor 4 for transferring the combustion products into the combustion furnace 10, the power is transmitted to the screw conveyor 4 by the motor drive.

In addition, the exhaust part 12 is arranged in front of the combustion furnace 10, is composed of a flue is formed partitioned on the front fire wall (1).

In the combustion furnace 10, a partition 3 having an upper opening is formed in front of the combustion means 20, so that combustion gas stays in the combustion furnace 10 for a long time. Through it is possible to increase the combustion efficiency and thermal efficiency.

In addition, the opening and closing hole 13 is installed at the lower part of the rear fire wall 1 to remove burnt ashes, foreign substances, etc. dropped to the bottom of the fire wall 1, and also to the grate 23 of the combustion means 20 or the transfer means. (30) enables maintenance such as cleaning or troubleshooting.

In this case, although not shown in the accompanying drawings, it is preferable to use a device such as a cylinder for opening and closing the opening and closing, for example, a hydraulic pressure or a pneumatic working fluid, so as to be able to safely open and close the heating door heated at high temperatures. .

In addition, the opening and closing port 13 may be provided with an outside air inlet pipe 14 for introducing outside air into the combustion furnace 10 to supply combustion air to the outside air inlet passage S, thereby further accelerating combustion.

As shown in Figures 1 to 3 the combustion means 20 according to the invention

Wood chips stacked on the grate 23, or solid fuel is heated to burn, and serves to supply thermal energy to use the heat of combustion.

The combustion means 20 is provided in the combustion furnace 10, the fixed frame 21 having a guide portion 22, and the grate 23 connected to the fixed frame 21 consists of a multi-stage This is done including.

First, a fixing bracket 21e is provided below the fixing frame 21 to fix the fixing frame 21 to the bottom surface of the fireproof wall 1.

The fixing frame 21 is connected to both sides of the upper and arranged upright, the second cradle (21a) is shortened from the rear toward the front is provided.

And both sides of the grate 23 is provided with a second support bar (23c) is fixed over the second cradle (21a),

At this time, the upper end of the second holder (21a ) is provided with a settling groove (21b) so that the second support bar (23c) can be placed to form a stable support structure.

In addition, a plurality of fixing bars 21c are connected to both upper sides of the fixing frame 21 to connect the side wall part 40.

The side wall portion 40 has a cross-sectional shape of '∩' shape is inserted into each of the fixing bar (21c), the upper end of each fixing bar (21c) is provided with a cylindrical connecting bar (21d) It is connected and fixed inside the side wall portion 40.

In this case, the fixing bar 21c is formed to be shorter from the rear to the front, so that the connecting bar 21d is also inclined.

The side wall portion 40 coupled to the connection bar 21d is also inclined downward toward the front side.

In addition, the side wall part 40 is in close contact with both side surfaces of the fireproof wall 1, and is also in close contact with both sides of the grate 23 and positioned above the grate 23 and the lower space. It will act as a seal.

In addition, as shown in FIG. 3, the guide part 22 is connected to a frame 22f provided in both sides of the fixed frame 21 in a vertical direction, and the frame 22f is spaced apart from the front and rear of the fixed frame 21. Installed,

A pair of support brackets 22c are spaced apart from each other and coupled to each of the frames 22f,

A pair of guide rollers 22a are coupled to each of the support brackets 22c by a rotation shaft 22d.

And the inner side of the guide roller (22a) is provided with a contact roll 22b, the guide bar (31a) of the transfer frame 31 to be carried by the guide roller (22a) and the contact roll (22b) is placed on the transfer frame When moving in the front-rear direction of 30, the guide bar 31a is rotatably supported.

In particular, the grate 23 of the combustion means 20 according to the present invention is composed of a multi-stage,

The rear end is arranged so that the stage is lowered toward the front, the grate 23 is arranged spaced apart from each other at regular intervals

The drying unit (D), pre-combustion unit (C1), main combustion unit (C2) and post-combustion unit (C3) are sequentially arranged from the upper end to burn wood chips or solid fuel in stages.

Although not shown in the drawing attached to the lower part of the grate, the heating burner is provided in the main combustion part so that it operates only at the first ignition of the wood chips or the solid fuel.

First, the grate 23 located at the top of the grate 23 is a wood chip containing moisture as the drying part D or an incomplete combustion furnace by drying the solid fuel and supplying it to the combustion parts located at the bottom. It is desirable to prevent emissions of the exhaust gases so that efficient combustion is possible.

Next, the pre-combustion unit C1 is located at the lower end of the drying unit D, and wood chips from which moisture is removed by the drying unit D, or the solid fuel is preheated to a predetermined temperature prior to the main combustion. This allows for faster, more efficient combustion.

And the main combustion unit (C2) is located at the lower end of the pre-combustion unit (C1) to burn wood chips or solid fuel heated to some extent by the pre-combustion unit (C1),

At this time, the heating burner first ignites the wood chips or the solid fuel supplied from the pre-combustion unit C1 and stops the operation.

Finally, the post-combustion unit C3 is located at the bottom of the main combustion unit C2 and maximizes combustion efficiency by realizing complete combustion by additional combustion of wood chips or solid fuel burned by the main combustion unit C2. You can do it.

On the other hand, the grate 23 is a plurality of lattice elements are heat-resistant steel reciprocating grate 23, the material of the main material is iron, C (0.3 ~ 0.5%), Cr (2.1 ~ 2.3%), Mn (0.5 ~ 1.5) %), Ni (9-11%), Si (1-2.5%), S (0.03% or less), P (0.045% or less), etc.

Such lattice elements are chemically safe because they are not oxidized at various gases including combustion gases and at high temperatures, and are excellent in properties such as high temperature hardness, heat transfer properties, and thermal fatigue.

Furthermore, no deformation or carbides are decomposed at the use temperature, and thermal expansion occurs due to temperature rise, and thermal stress is generated, so that the lattice elements are not cracked or destroyed.

3, the grate 23 is arranged in such a manner that the plurality of lattice elements overlap each other to form a base panel 23a in which wood chips or solid fuel are stacked.

The grid elements are bent at an angle of 90 degrees downward to form the front panel 23b.

In addition, a plurality of ventilation holes are formed in the support panel 23a and the front panel 23b.

The second vent hole 37 formed in the support panel 23a is in communication with the external air inflow passage S positioned under the grate 23 so that the combustion air is supplied to the wood chips or the solid fuel to supply combustion. Accelerated.

In addition, the plurality of vent holes formed in the front panel 23b are communicated with the external air inflow passage S as the first nozzle holes 25 to blow ash generated in each combustion step forward to be located at the bottom. By pushing it to the grate 23, the ash is conveyed more quickly and smoothly to the post-combustion section C3, that is, to the final processing step (see FIG. 3C).

In this case, in front of the post-combustion unit C3, a wood chip or a screw conveyor 4 for conveying the ash of the solid fuel is provided, and the ash is transported and discharged.

The screw conveyor 4 is powered by the drive of the motor (M).

As shown in Figures 1 to 3 the transfer means 30 according to the invention

It is provided between the grate 23 of the combustion means 20 is configured to be able to uniformly transfer the wood chips or solid fuel to the next stage after each stage of combustion is finished.

The transfer means 30 is arranged below the grate 23, the transfer frame 31 supported by the guide portion 22, and the drive unit connected to the transfer frame 31 to transfer power ( 33),

And it is connected to the transfer frame 31 is arranged between the grate 23, and includes a compact plate 35 for pushing the combustion products accumulated on the grate 23 to the grate 23 located at the bottom It is done by

First, the transfer frame 31 of the transfer means 30 is capable of moving in the front and rear direction by the guide portion 22,

The transfer frame 31 is provided with a guide bar (31a) to be mounted on the guide portion 22, that is, the contact roll (22b) of the guide roller (22a).

And the drive unit 33 of the transfer means 30 is composed of a drive cylinder (33a) arranged in the rear of the transfer frame 31 to transfer power to the transfer frame 31,

At this time, the cylinder rod (33b) provided in the drive cylinder (33a) is connected to the rear end of the transfer frame (31) when the drive cylinder (33a), the transfer frame by the reciprocating motion of the cylinder rod (33b) The forward and backward operation of 31 is made.

At this time, the transfer frame 31 is supported by the guide bar 31a is mounted on the contact roll 22b of the guide roller 22a, the guide roller 22a and the forward and backward operation of the transfer frame 31 Operational stability of the transfer frame 31 is ensured by the rotation of the contact roll 22b to support the guide bar 31a.

And the plate 35 of the transfer means 30 is provided with a first support rod (35c) on both sides,

The transfer frame 31 is provided with a first cradle 31b connected to the guide bar 31a and arranged upright, and provided to the first cradle 31b on the first support rod 35c of each of the mill plates 35. On top of it,

In this case, a seating groove 31c is formed at an upper end of the first holder 31b to allow the first support rod 35c to be seated thereon.

Therefore, the plates 35 are mounted on the transfer frame 31 as described above and are disposed in the space between the grate 23, that is, the grate 23.

At the time of the forward movement of the transfer frame 31 by the drive unit 33, by moving the combustion products accumulated on the grate 23 at the same time to the bottom to remove the transfer deviation, thereby minimizing the heat loss combustion Efficiency can be increased.

In addition, the upper side of the plate 35, which is located at the top of the plate 35, the induction plate 5 inclined downward toward the front (Fig. 3 (A) and (B) as shown in the side wall portion 40 Is connected to the upper inner surface.) Wood chips or solid fuel is supplied through the input portion 11, so that the solid fuel can fall down and flow down the inclined surface of the guide plate (5) Therefore, the supply of solid fuel can be made smoothly.

Furthermore, the close plates 35 include a support panel 35a and a push panel 35b formed by bending a front end portion of the support panel 35a downward.

The ash accumulated in the grate 23 on the push panel 35b is pushed forward to be transferred to the grate 23 at the bottom.

And a plurality of ventilation holes are formed in the support panel 35a and the push panel 35b of the mill plate 35,

In particular, the ventilation hole formed in the push panel 35b is in communication with the outside air inflow passage S by the second nozzle hole 39, and ejects the incoming air to the front to lower the ash accumulated in the grate 23. It moves to the grate 23 located in the, and finally it is possible to move quickly and smoothly to the screw conveyor (4 ') located in front of the post-combustion section (C3) (see Fig. 3 (C)).

In addition, the second vent hole 37 formed in the support panel 35a is in communication with the external air inflow passage S, so that the combustion air can be supplied to the wood chips or the solid fuel to accelerate the combustion.

That is, as described above, the grate 23 of the combustion means 20 and the contact plates 35 of the transfer means 30 according to the present invention are as shown in FIG.

The plates 35 are sequentially arranged in the first stage, the third stage, the fifth stage and the seventh stage, that is, the odd stage from the top to the bottom,

The grate 23 is sequentially arranged in two stages, four stages, six stages and eight stages, that is, even stages from the top to the bottom.

However, as described above, the number of arrangement as described above can be increased or decreased in consideration of the amount of wood chips or solid fuel to be burned, the combustion efficiency, the thermal efficiency, and the like, but is not limited to a specific number as shown in the accompanying drawings.

In addition, in the present invention, the drying unit (D), pre-combustion unit (C1), main combustion unit (C2) and post-combustion unit (C3) are arranged in sequence,

If necessary, it is also possible to arrange the drying section in two or more stages,

In addition, when the livestock waste is combusted, the sterilization function is also performed in the drying section or the combustion section.

On the other hand, the boiler according to the present invention is provided with a plurality of injection nozzles to supply the compressed air into the combustion furnace 10 to amplify and recombust the combustion gas to greatly increase the combustion efficiency and thermal efficiency,

In addition, even if the combustion area is relatively narrow through amplification and recombustion of combustion gas, sufficient combustion can be ensured.

The injection nozzle for this is first provided with a primary injection nozzle (N1) formed on one side of the fire-resistant wall (1),

Next, a second injection nozzle (N2) is formed toward the side wall from the front of the refractory wall (1) to expose the nozzle pipe (n) into the combustion furnace (10).

In addition, the exhaust part 12 is provided with a third injection nozzle (N3) to expose the nozzle pipe (n) from the rear of the fire-resistant wall (1) into the flue,

The third injection nozzle (N3) serves to amplify the combustion gas, and can be separated and removed by the powerful compressed air to remove the solid matter stuck to the flue wall surface can be used for cleaning purposes.

Furthermore, the boiler according to the present invention is provided with a manhole in the front and rear of the side wall of the fireproof wall (1) can collect the ash accumulated on the bottom surface through the manhole (MH),

In addition, the lid provided in the manhole is configured to be opened and closed by the opening and closing means.

Boiler according to the present invention configured as described above is configured to have an output of more than 500kw (430,000kcal / h), mainly used for farms,

The present invention is not limited to this, and it can be applied to various technical fields aimed at burning wood chips and solid fuel and using the heat of combustion.

On the other hand, a heat exchanger (not shown) is provided in the upper part of the combustion furnace, that is, the refractory wall according to the present invention, and a chamber is provided in the heat exchanger, and a plurality of associations 60 are arranged in the chamber.

And the associated cleaning means 50 is arranged at the opposite end of the association in communication with the combustion furnace, which will be described in detail below.

The associated cleaning means 50 supplies compressed air to the associated pipe 60 to remove carbon (soot) or other foreign matter adhering to the associated wall of the pipe,

The associative cleaning means 50 basically comprises a plurality of injection elements 51 for supplying compressed air in an associative manner.

Specifically, as can be seen in [A], which is a cross-sectional view in FIG. 5, and [B], which is a conceptual view, each injection element 51 communicates compressed air between an inner tube 51A, an outer shell 51B, and an inner tube and the outer shell. It comprises the passage 51C.

The inner tube 51A has an opening 51a at an upper end thereof, and the outer shell 51B surrounds the inner tube 51 to form a space around the opening 51a, and is slit between the inner tube 51a. Form 51D.

Compressed air passages, in particular the injection element 51, are arranged in an integrated manner so as to communicate with the air chamber 53A of the integrated body 53 (see FIG. Compressed air supplied from the compressed air passage (51C)

It accelerates and flows into the opening part 51a of the inner tube 51A via the said slit 51D.

Accordingly, the primary inlet air is accelerated (amplified) while passing through the slit 51D, and the secondary inlet air stream at the periphery is continuously formed by the air flow of the primary inlet air. The principle in which the air injection system is formed allows for more complete cleaning.

In particular, in order to ensure the acceleration characteristics of the compressed air downward through the opening 51a of the inner tube 51A to the inner surface of the inner tube, and to make the passage direction of the slit 51D downward toward the inner surface of the inner tube 51A. The inner wall of the periphery of the opening 51a forms a downwardly inclined curved portion 51b so that the compressed air and the surrounding external air are supplied in the form of jet streams.

Such characteristics can be better understood through the conceptual diagram shown in FIG. 5B.

Next ([A] is the front view, [B] is the side cross-sectional view) and FIG. 4 ([A] is the schematic front view, [B] is the associated cleaning means 50 at the outside front of the heat exchanger in [A]). The upper first valve with respect to the lower three pairs of valves of the upper two pairs of valves and the lower three pairs of valves 55 in relation to the collector mounted on the semicircular frame 50A about the hinge 50a. A view of the pair in plan view,

[C] is a view of the five valves 55 arranged up and down in [A] in a side cross-sectional view),

A boiler having an associated cleaning means of a heat exchanger according to the present invention proposes an integrated arrangement of a plurality of injection elements 51 in order to increase the cleaning efficiency, improve the assemblability, and enhance the maintenance function.

In other words, the spraying elements 51 are collectively arranged in the integrated body 53 (see FIGS. 5A and 4).

The integrated body 53 has an air chamber 53A (see FIG. 4B) connected to the compressed air passages 51C of the respective injection elements 51, and an air injection nozzle 53a in communication with the air chamber. (See FIG. 4C).

In addition, each integrated body 53 may be provided with an air discharge nozzle in communication with the individual association 60, but in consideration of productivity and the like, the front end of the association 60 is integrally arranged in a disc, and between the discs. Arrange the separate communication chamber 54 (see Fig. 4 [C]),

In the integrated body 53, a plurality of air discharge nozzles 53b (see FIG. 4C) are arranged so that compressed and accelerated (amplified) air is supplied to the associated pipe 60 through the communication chamber 54 for cleaning. It is supposed to perform

On the other hand, the air injection nozzle 53a is preferably opened and closed by the valve 55.

In addition, an air header 57 having a compressed air staying space 57S (see Fig. 4B) is introduced therein so as to easily allow the compressed air to be accurately injected into the air nozzle 53a.

Further, in introducing the associated cleaning means 50 for the front circular shape of the cylindrical heat exchanger for ease of manufacture, in order to ensure the realistic and high quality of the integrated body 53, the integrated body is not in the shape of a disc or a semi-circle but air It is preferable to combine the integrated panel powders, such as square or trapezoid, which has the chamber 53A (refer FIG. 4 [A]).

Furthermore, two air headers 57, which guarantee smooth air supply to the integrated panel powders, are arranged in communication with each of the integrated panel powders arranged on both semicircular frames 50A (FIG. 4). [A] shows the injection element 51 and the panel type integrated body 53 in the semi-circular frame 50A.

It can be seen that two air headers 57, which are formed vertically and long, by two dashed lines, are provided in the center of each semicircular frame 50A).

In FIG. 4A, compressed air supplied from a separate compressor, etc., is supplied to the inner space 57S of the air header 57 through the injection pipe P1 (air or maintenance that cannot be supplied to the associated pipe 60), and the like. To remove the compressed air through the discharge pipe (P2),

A valve that opens and closes the air injection nozzle 53a of the integrated body 53, in particular, is opened and closed by an air pulse valve (electric or pneumatic), and is controlled by a controller composed of a programmable logic controller (PLC) or a conventional microcomputer. Can be controlled)

Through the air chamber 53A of the integrated body 53 and through the compressed air passage 51C of each injection element 51

It is amplified (accelerated) and introduced to the outside air in the form of a unique slit (21D) and further amplified to form a jet stream, passing through the inner pipe (51A), passing through the communication chamber (54), and introduced into the pipe (60). Remove foreign substances from the inner wall.

An air pulse valve 25 communicating with the air header 57 to open and close the air injection nozzle 53a of the integrated body 53 is provided for each air injection nozzle 53a.

As can be seen in FIG. 4B, the nozzle 53a communicates with the connecting pipe 55A, and an earthquake resistant member, particularly a flexible tube 55a, is provided between the valve and the connecting pipe. The vibration due to the operation of the boiler is not transmitted to the valve 55.

This flexible tube also functions to easily correct the discrepancy between the valve 55 and the air injection nozzle 53a so that the connection pipe 55A can be accurately coupled.

The pulse valve 55 uses a high durability diaphragm and a precision spring to prevent leakage. In addition, a special air header equipped with a plurality of pulse valves is manufactured by precisely machining a solid quadruple pipe to perform the performance of a two-stage injection system. It is supposed to serve to multiply.

In the description of the wood pellet boiler of the present invention eco-friendly and high efficiency with reference to the accompanying drawings, the present invention has been described with a particular shape and direction, the present invention can be variously modified and changed by those skilled in the art, such modifications and changes are the present invention It should be construed as being included in the scope of the right.

D: Drying unit C1: Pre-combustion unit
C2: Main combustion part C3: Post combustion part
N1: 1st injection nozzle N2: 2nd injection nozzle
N3: 3rd injection nozzle n: nozzle pipe
MH: Manhole S: Outside inflow passage
M: Motor
1: fireproof body 2: base frame
3: bulkhead 4: screw conveyor
5: induction plate
10: combustion furnace 11: input unit
12: exhaust 13: opening and closing
14: outside air inflow pipe
20: combustion means 21: fixed frame
21a: second cradle 21b: settling groove
21c: Fixing bar 21d: Connecting bar
21e: Fixed Bracket 21f: Frame
22: guide portion 22a: guide roller
22b: contact roll 22c: support bracket
22d: axis of rotation 23: grate
23a: Base panel 23b: Front panel
23c: second support rod 24: first vent hole
25: first nozzle hole
30: transfer means 31: transfer frame
31a: guide bar 31b: first holder
31c: seating groove 33: drive unit
33a: drive cylinder 33b: cylinder rod
35: plate 35a: support panel
35b: push panel 35c: first support rod
37: second vent hole 39: second nozzle hole
40: side wall
50: associated cleaning means
51: injection element 51A: inner tube
51B: sheath 51C: compressed air passage
53: aggregate 53AP: air chamber
54: communication chamber 55: valve
57: air header
60: association

Claims (4)

A combustion furnace 10 having an input unit 11 and an exhaust unit 12;
A fixed frame 21 provided in the combustion furnace 10 and having a guide part 22;
The grate 23 formed of multiple stages connected to the fixed frame 21 and configured to sequentially arrange a drying unit D, a preliminary combustion unit C1, a main combustion unit C2, and a post-combustion unit C3 in sequence. Combustion means 20 comprising a; And
A transfer frame 31 arranged below the grate 23 and supported by the guide part 22;
A driving unit 33 connected to the transfer frame 31 to transmit power;
Is connected to the transfer frame 31 is arranged between the grate 23, and includes a compact plate 35 for pushing the combustion products stacked on the grate 23 to the grate 23 located at the bottom Transfer means 30;
/ RTI >
The upper part of the combustion furnace 10 is provided with a heat exchanger,
The heat exchanger is provided with a chamber in which a plurality of associations 60 are arranged therein,
An association cleaning means 50 is further provided at an end of the association 60 in communication with the combustion furnace 10.
The associated cleaning means 50 is
A plurality of injection elements (51) for supplying compressed air to the associating (60),
Each of the injection elements 51 is surrounded by an inner tube 51A having an opening 51a at an upper end thereof, and is spaced apart from the inner tube 51A to form a space around the opening 51a, wherein the inner tube 51A is provided. And a shell 51B forming a slit 51D and a passage 51C through which compressed air is communicated between the inner tube 51A and the shell 51B.
Eco-friendly high-efficiency wood pellet boiler, characterized in that the inner wall around the opening (51a) of the inner tube (51A) consists of a downwardly curved surface portion (51b). The method of claim 1,
The guide portion 22 is connected to the fixed frame 21, and consists of a guide roller 22a having a contact roll 22b inside,
The transfer frame 31 is further provided with a guide bar (31a) to be placed on the contact roll (22b) of the guide roller (22a),
The transfer means 30 is
Support rods 35c connected to both sides of the mill plates 35,
The eco-friendly high-efficiency wood pellet boiler, characterized in that it further comprises a cradle (31b) is arranged upright in the guide bar (31a), the support rod (35c) spans. The method of claim 1,
It is further provided with a side wall portion 40 connected to both sides of the fixed frame 21, in close contact with both sides of the inner wall surface of the combustion furnace 10 and the grate 23,
The outside of the grate 23 is further provided with an external air inflow passage (S) in communication with the outside,
The grate 23 or the plate 35, or both of them are further provided with a plurality of ventilation holes 24, 37 in communication with the outside air inlet passage (S) Wood pellet boiler.
4. The method according to any one of claims 1 to 3,
The injection elements 51 of the associated cleaning means 50 are arranged in the integrated body 53,
The integrated body 53 associates an air chamber 53A connected to a passage 51C of each injection element 51, an air injection nozzle 53a in communication with the air chamber 53A, and introduced air (60). Including a communication chamber (54) for supplying

The air introduced into the air injection nozzle 53a is accelerated through the air chamber 53A of the integrated body 53, through the passage 51C of each injection element 51, and by the slit 51D. Environmentally efficient wood pellets, characterized in that the outside air is introduced into the secondary pipe 60 through the communication chamber 54 through the inner pipe 51A to remove foreign substances on the inner wall of the pipe while forming the jet stream by secondary flow. Boiler.

Images