Efficient furnace core and gasification furnace

Abstract

The efficient furnace core comprises a cavity, at least one first air inlet hole is formed in the inner surface of the cavity, and an air inducing pipe is arranged in the first air inlet hole. The gasification furnace comprises a furnace body and a cavity formed in the furnace body, a furnace opening is formed in the upper end of the furnace body, a material adding opening, a furnace ash opening and a secondary gas inlet are formed in the side face of the furnace body, the furnace ash opening is formed in the lower portion of the cavity, and the material adding opening is communicated with the interior of the cavity. Gas introduced from the secondary air inlet enters the cavity through the air inducing pipe opening, and the air inducing pipe induces air towards the interior of the cavity in the same direction, or clockwise, or anticlockwise, or heavily straight towards the center of the cavity. The utility model has the advantage that the gasification effect can be improved by more than 4% under the condition of limited gas inlet area.

Description

Technical Field

[0001] The utility model relates to a gasifier, in particular to a high-efficiency furnace core and a gasifier. Background Art

[0002] In the prior art, the method of secondary air intake in the furnace core is adopted to improve the combustion efficiency of the furnace core. In order to further improve the combustion efficiency of the furnace core, that is, the gasification effect, only the area of secondary air intake can be increased. However, in order to maintain the combustion temperature in the furnace core, the area of secondary air intake has an upper limit value. Once this upper limit value is exceeded, negative effects will be brought. In order to further improve the combustion efficiency within the effective secondary air intake area, through repeated experiments by the inventor, it is found that during the secondary air intake process, the air flow directions of the intake air are inconsistent and will interfere with each other, thereby reducing the gasification effect generated by the secondary air intake. Summary of the Invention

[0003] The utility model provides a high-efficiency furnace core and a gasifier for improving the secondary air intake effect, which can increase the gasification effect by more than 4% under the condition of a limited air intake area.

[0004] The technical solution for realizing the invention purpose of the utility model is that a high-efficiency furnace core includes a cavity, at least a first air intake hole is provided on the inner surface of the cavity, and an air guiding pipe is arranged in the first air intake hole.

[0005] Furthermore, the air guiding pipe orifice is flush with the inner surface of the cavity.

[0006] Furthermore, the air guiding directions of the air guiding pipes in the multiple first air intake holes are the same;

[0007] The air guiding direction is clockwise or counterclockwise in the cavity or perpendicular to the center of the cavity.

[0008] Furthermore, the cavity includes a combustion chamber composed of an inner wall and an outer wall, there is a gap between the inner wall and the outer wall, the upper part of the gap is a sealed structure, the lower part of the gap is an open structure, the first air intake hole is arranged on the inner surface of the inner wall, one orifice of the air guiding pipe is in the gap, and the other orifice of the air guiding pipe is flush with the inner surface of the inner wall.

[0009] Furthermore, the cavity further includes a combustion cap arranged on the upper part of the combustion chamber, and the cross section of the groove of the combustion cap is trapezoidal;

[0010] The combustion cap is provided with a second ventilation hole.

[0011] Furthermore, the combustion cap and the combustion chamber are also of a detachable structure.

[0012] Furthermore, a notch ring is arranged on the inner ring of the sealed structure on the upper part of the combustion chamber, and a lower protruding ring is arranged on the inner ring of the lower part of the combustion cap;

[0013] The notched ring can be embedded in the lower protruding ring.

[0014] The gasifier includes a furnace body and a cavity provided inside the furnace body. The upper end of the furnace body is provided with a furnace opening. A feeding port, a furnace ash port, and a secondary air inlet are provided on the side surface of the furnace body. The furnace ash port is provided at the lower part of the cavity, and the feeding port is communicated with the inside of the cavity.

[0015] The gas introduced through the secondary air inlet enters the inside of the cavity through the air guiding pipe orifice.

[0016] Furthermore, the cavity includes a combustion chamber composed of an inner wall and an outer wall. There is a gap between the inner wall and the outer wall. The upper part of the gap is a sealed structure, and the lower part of the gap is an open structure. The first air inlet hole is provided on the inner surface of the inner wall. One orifice of the air guiding pipe is in the gap, and the other orifice of the air guiding pipe is flush with the inner surface of the inner wall.

[0017] The secondary air inlet is communicated with the gap.

[0018] Furthermore, the cavity further includes a combustion cap provided above the combustion chamber. The cross-sectional shape of the combustion cap groove is trapezoidal.

[0019] The combustion cap is provided with a second ventilation hole, and the second ventilation hole is communicated with the secondary air inlet through an air passage.

[0020] Furthermore, the combustion chamber and the combustion cap are of a detachable structure.

[0021] The high-temperature sleeve can be provided inside the combustion chamber.

[0022] The advantages of the present utility model are as follows: 1) By utilizing the air guiding function of the air guiding pipe (during the combustion process in the combustion chamber, oxygen is consumed, which is equivalent to an environment with a slightly negative pressure. The air guiding pipe introduces the air containing oxygen, which is equivalent to blowing in through the air guiding pipe. The air guiding pipe is generally 0.5 - 5 cm. If it is too long, there will be no effect), the secondary air inlet air velocity of the first air inlet hole can be increased, so that more air can contact the combustible gas, thereby improving...

[0023] 2) The air introduced by the air guiding pipe enters the combustion chamber in a clockwise or counterclockwise direction, thereby avoiding the mutual interference of adjacent first air inlet holes, which affects the air inlet efficiency, and enabling the secondary air entering through the first air inlet hole to blow more towards the middle of the combustion chamber.

[0024] 3) The air inlet pipe opening is flush with the inner surface of the cavity, which has two functions. One is that a more fire-resistant cylinder can be placed in the cavity, enabling the biomass gasifier to be transformed into a coal gasifier. The central temperature for burning biomass is generally 100 - 200 degrees Celsius, while that for burning coal is 600 - 800 degrees Celsius. When burning coal, a more fire-resistant cylinder needs to be placed in the combustion chamber to protect it. The other is that the air inlet pipe is not easily deformed. If it extends into the cavity, it is prone to overheating during the combustion process, causing deformation of the air inlet pipe opening.

[0025] 4) The combustion cap is provided with a second ventilation hole to further increase the opening for secondary air intake. Setting the second ventilation hole at the upper end of the combustion chamber allows for sufficient combustion.

[0026] 5) The combustion cap and the combustion chamber are also of a detachable structure. That is, by disassembling and assembling the combustion cap and the combustion chamber, a more fire-resistant cylinder can be placed into or removed from the combustion chamber, thus achieving the free switching between burning coal and burning biomass. Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the high-efficiency furnace core structure.

[0028] Figure 2 It is Figure 1 the schematic diagram of the A - A cross-section of

[0029] Figure 3 It is a schematic diagram of the preferred structure of the high-efficiency furnace core.

[0030] Figure 4 It is Figure 3 the schematic diagram of the B - B cross-section of

[0031] Figure 5 It is a schematic diagram of another preferred structure of the high-efficiency furnace core.

[0032] Figure 6 It is Figure 5 the schematic diagram of the combustion chamber structure in

[0033] Figure 7 It is Figure 5 the schematic diagram of the combustion cap structure in

[0034] Figure 8 It is a schematic diagram of the cross-section of the gasifier.

[0035] Figure 9 It is a schematic diagram of the preferred cross-section of the gasifier.

[0036] As shown in the figure: cavity 1, first air inlet 2, air inlet pipe 3, inner wall 11, outer wall 12, combustion chamber 13, combustion cap 14, second air inlet 15, notch ring 16, lower protruding ring 17, furnace body 20, furnace opening 21, feeding port 22, ash outlet 23, secondary air inlet 24. Detailed implementation mode

[0037] As Figure 1 In [reference], an efficient furnace core includes a cavity 1. At least a first air inlet hole 2 is provided on the inner surface of the cavity 1. An air guiding pipe 3 is provided in the first air inlet hole 2. The length of the air guiding pipe 3 is generally 0.5 cm to 5 cm.

[0038] Preferably, the opening of the air guiding pipe 3 is flush with the inner surface of the cavity 1.

[0039] As Figure 2 shown, the air guiding directions of the six air guiding pipes 3 in the six first air inlet holes 2 are the same;

[0040] The air guiding direction is clockwise in the cavity 1, or it can be counterclockwise or perpendicular to the center of the cavity 1. Generally, clockwise or counterclockwise is preferred. The gasification effect, that is, the combustion efficiency, is higher than that when perpendicular to the center of the cavity 1, generally higher than 2%. Compared with the case without the air guiding pipe 3, the combustion efficiency is increased by more than 5.2%.

[0041] Test method: Use firewood of equivalent weight. The cavities 1 with the air guiding pipe 3 are divided into three groups A, B, and C, with the air guiding directions being clockwise, counterclockwise, and perpendicular to the center of the cavity 1 respectively. The control group D is set with a cavity 1 without an air guiding pipe 3. There are five cavities 1 in each group. The above twenty cavities are placed in the same gasification furnace, that is, the gasification furnace is the same except for the cavity 1, and is placed in a relatively airtight environment. A ventilation pipe is provided at the lower part to introduce air into each gasification furnace, and an air extraction device is provided at the upper part to extract air to keep the air humidity in the relatively airtight environment within a controllable range. An open container is placed on each cavity 1, and the same mass and temperature of water are placed in each container for heating until all the biomass is burned out. Finally, see how much water remains in the container. The less water remains, the higher the combustion efficiency of the cavity. Conversely, the efficiency is lower. That is, by comparative analysis, which cavity has a higher combustion efficiency. It is found that the test results of groups A and B are almost the same in the four groups of comparative tests. The efficiency of groups A and B is 2% higher than that of group C and more than 5% higher than that of group D.

[0042] As Figure 3 、 4 , the cavity 1 includes a combustion chamber 13 composed of an inner wall 11 and an outer wall 12. There is a gap between the inner wall 11 and the outer wall 12. The upper part of the gap is a sealed structure, and the lower part of the gap is an open structure. The first air inlet hole 2 is provided on the inner surface of the inner wall 11. One end of the air guiding pipe 3 is in the gap, and the other end of the air guiding pipe is flush with the inner surface of the inner wall 11.

[0043] As Figure 5, the cavity 1 further includes a combustion cap 14 provided above the combustion chamber 13, and the cross-section of the combustion cap 14 is trapezoidal;

[0044] The combustion cap 14 is provided with second ventilation holes 15.

[0045] Preferably, the combustion cap 14 and the combustion chamber 13 are also of a detachable structure.

[0046] Such as Figure 6 , 7 As shown, a notch ring 16 is provided on the inner ring of the sealing structure above the combustion chamber 13, and a lower protruding ring 17 is provided on the inner ring of the lower part of the combustion cap 14;

[0047] The notch ring 16 can be embedded in the lower protruding ring 17.

[0048] Such as Figure 8 As shown, the gasifier includes a furnace body 20 and a cavity 1 provided inside the furnace body 20. There is a spaced space between the inner surface of the furnace body 20 and the outer surface of the cavity 1. A furnace opening 21 is provided at the upper end of the furnace body 20. The hot gas combusted inside the cavity 1 is discharged through the furnace opening 21 to heat the outside. A feeding port 22, an ash port 23, and a secondary air inlet 24 are provided on the side of the furnace body 20. The ash port 23 is provided below the cavity 1, and a grille is provided between the two. The ash after combustion inside the cavity 1 will fall into the ash port 23 through the grille. Generally, a box for loading ash is also provided at the ash port 23. When the cavity 1 is burning, the box is generally placed inside the ash port 23, and the box is taken out only when the ash needs to be cleaned. The feeding port 22 is communicated with the inside of the cavity 1, and biomass fuel is added into the cavity 1 through the feeding port 22;

[0049] The gas introduced through the secondary air inlet 24 enters the spaced space and then enters the inside of the cavity 1 through the mouth of the air duct 3. The direction of the air duct 3 guiding air into the inside of the cavity 1 is the same, either clockwise, or counterclockwise, or vertically towards the center of the cavity 1.

[0050] Such as Figure 9 , the cavity 1 includes a combustion chamber 13 composed of an inner wall 11 and an outer wall 12. There is a gap between the inner wall 11 and the outer wall 12. The upper part of the gap is a sealing structure, and the lower part of the gap is an open structure. The first air inlet 2 is provided on the inner surface of the inner wall 11. One end of the air duct 3 is in the gap, and the other end of the air duct 3 is flush with the inner surface of the inner wall 11;

[0051] The secondary air inlet 24 is communicated with the gap.

[0052] Preferably, the cavity 1 further includes a combustion cap 14 provided above the combustion chamber 13. The cross-section of the combustion cap 14 is trapezoidal, and there is a spaced space between the outer surface of the cavity 1 and the furnace body 20;

[0053] The combustion cap 14 is provided with a second vent hole 15, and the second vent hole 15 is communicated with the secondary air inlet 24 through an air passage via a spaced space.

[0054] Preferably, the combustion chamber 13 and the combustion cap 14 are of a detachable structure;

[0055] When it is necessary to burn coal, the combustion cap 14 is removed and the high-temperature sleeve is placed inside the combustion chamber 13. When it is necessary to burn biomass, the high-temperature sleeve is taken out.

Claims

1. A high-efficiency furnace core, characterized by: The furnace core includes a cavity, the inner surface of the cavity is provided with at least a first air inlet hole, and an air duct is provided in the first air inlet hole; the pipe mouth of the air duct is flush with the inner surface of the cavity; the air ducting directions of multiple air ducts in multiple first air inlets are consistent; the air ducting direction in the cavity is clockwise or counterclockwise or vertically toward the center of the cavity.

2. The high-efficiency furnace core according to claim 1, characterized in that: The cavity includes a combustion chamber consisting of an inner wall and an outer wall, there is a gap between the inner wall and the outer wall, the upper part of the gap is a sealed structure, and the lower part of the gap is an open structure, the first air inlet hole is arranged on the inner surface of the inner wall, the pipe opening at one end of the air duct is in the gap, and the pipe opening at the other end of the air duct is flush with the inner surface of the inner wall.

3. A high-efficiency furnace core according to claim 2, characterized in that: The cavity also includes a combustion cap arranged at the upper part of the combustion chamber, and the cross section of the combustion cap is trapezoidal; a second vent hole is arranged on the combustion cap.

4. The high-efficiency furnace core according to claim 3 is characterized in that: The combustion cap and the combustion chamber can also be detachable structures.

5. A high efficiency furnace core according to claim 4, characterized in that: The inner ring of the sealing structure at the upper part of the combustion chamber is provided with a notched ring, and the inner ring at the lower part of the combustion cap is provided with a lower protruding ring; The notched ring can be inserted into the lower protruding ring.

6. A gasifier using the high-efficiency furnace core of claim 1, characterized in that: The gasification furnace comprises a furnace body and a cavity in the furnace body, a furnace opening is provided at the upper end of the furnace body, a charging port, an ash port, and a secondary air inlet are provided on the side of the furnace body, the ash port is provided at the lower part of the cavity, and the charging port is communicated with the inside of the cavity; The gas introduced from the secondary air inlet enters the cavity through the air duct opening, and the air duct ducts the air into the cavity in the same direction, either clockwise, counterclockwise, or vertically toward the center of the cavity.

7. A gasifier according to claim 6, characterized in that: The cavity comprises a combustion chamber composed of an inner wall and an outer wall, a gap is formed between the inner wall and the outer wall, the upper part of the gap is a sealed structure, and the lower part of the gap is an open structure, the first air inlet hole is arranged on the inner surface of the inner wall, the pipe opening at one end of the air duct is in the gap, and the pipe opening at the other end of the air duct is flush with the inner surface of the inner wall; The secondary air inlet is communicated with the gap.

8. A gasifier according to claim 7, characterized in that: The cavity also includes a combustion cap disposed on the upper portion of the combustion chamber, and the cross-sectional shape of the combustion cap groove is a trapezoid; a second air vent is disposed on the combustion cap, and the second air vent is connected to the secondary air inlet through an air passage.

9. A gasifier according to claim 8, characterized in that: The combustion chamber and the combustion cap are detachable structures.

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