Energy-saving vertical fluidized bed furnace

Abstract

The utility model discloses an energy-saving vertical fluidized bed furnace which comprises a furnace body, the furnace body is provided with a combustion chamber, an air inlet channel penetrating through the furnace wall is arranged on the furnace wall of the furnace body, an air interlayer is arranged on the furnace wall in the circumferential direction, and the air interlayer, the air inlet channel and the combustion chamber are sequentially communicated. The conveying pipeline is connected to the furnace wall and is communicated with the air interlayer; and the recovery fan is connected to the conveying pipeline and used for conveying air to the conveying pipeline. According to the vertical fluidized bed furnace disclosed by the utility model, the air interlayer is arranged on the furnace wall of the furnace body, so that heat radiated outwards by the furnace wall of the furnace body can be received in a large area and then enters the furnace body through the air inlet channel, the recovery of the heat radiated by the furnace wall is realized, and the utilization rate of the heat is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiling furnace technical field especially relates to an energy -conserving vertical type boiling furnace. BACKGROUND

[0002] Boiling furnace is a kind of multi-fuel hot blast furnace, when running, fuel is sent into the hearth fluidized bed at uniform speed by fuel feed inlet, combustion air fan delivers high pressure air, high pressure air is shot into the hearth through numerous air cap small holes on the air distribution plate located below, wind scattered in each direction is aggregated into "air cushion" to hold fuel and slag, fuel and slag are in fluidized state and boil and burn, fuel and coal ash jump up and down in high temperature state, rub, collide and crack, until burn out, due to the large contact area of air and fuel, and the fast movement speed of fuel, it has the characteristics of fast burning speed, high burnout rate, energy saving and environmental protection etc.

[0003] The existing boiling furnace reduces heat dissipation and improves energy utilization when running by setting insulation cotton on the furnace wall. However, the method of setting insulation cotton still has heat loss, causing heat waste. SUMMARY

[0004] To solve at least one problem existing in the prior art, according to one aspect of the utility model, an energy -conserving vertical type boiling furnace is provided, comprising:

[0005] Furnace body, the furnace body is equipped with combustion chamber, the furnace wall of the furnace body is equipped with air inlet passage through the furnace wall, the furnace wall is equipped with air sandwich along the circumference, the air sandwich, the air inlet passage, the combustion chamber are sequentially communicated;

[0006] Conveying pipeline, connected to the furnace wall, and the air sandwich is communicated;

[0007] Recovery fan, connected to the conveying pipeline, for conveying air to the conveying pipeline.

[0008] In some embodiments, the furnace body sequentially comprises boiling section, suspension section and settling section from bottom to top, the side wall of the suspension section is equipped with feed inlet, and the air sandwich is located in the boiling section, suspension section and settling section.

[0009] In some embodiments, the side wall of the suspension section and the settling section is equipped with air inlet passage.

[0010] In some embodiments, the caliber of the boiling section expands from bottom to top in sequence;The caliber of the suspension section remains constant;The caliber of the settling section decreases from bottom to top in sequence.

[0011] In some embodiments, the conveying pipeline comprises a main pipeline and a plurality of branch pipelines, the plurality of branch pipelines are arranged in sequence from top to bottom, one end of each branch pipeline is communicated with the main pipeline, and the other end is communicated with the air layer, and the main pipeline is communicated with the recovery fan.

[0012] In some embodiments, the vertical boiling furnace further comprises a plurality of air inlet pipelines, the plurality of air inlet pipelines are arranged one by one corresponding to the plurality of air inlet channels, and the air inlet pipelines are embedded in the air inlet channels.

[0013] In some embodiments, the air inlet channel is arranged obliquely downward.

[0014] In some embodiments, the angle between the air inlet channel and the horizontal plane ranges from 10 to 20 degrees.

[0015] In some embodiments, the projection of the air inlet channel on the horizontal plane in the vertical direction deviates from the radial direction of the furnace body.

[0016] In some embodiments, the vertical boiling furnace further comprises a combustion-supporting fan, and the combustion-supporting fan is used for inputting waste heat air.

[0017] In summary, the energy-saving vertical boiling furnace has the following technical effects:

[0018] By arranging the air layer on the furnace wall of the furnace body and the air inlet channel penetrating through the furnace wall, the recovery fan can convey air into the air layer through the conveying pipeline, the air layer is arranged along the circumference of the furnace body, can receive a large amount of heat radiated outward by the furnace wall, and then enters the furnace body through the air inlet channel, so that the heat radiated by the furnace wall is recovered, the utilization rate of heat is improved, and energy is saved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the energy-saving vertical boiling furnace of the embodiment of the utility model;

[0020] Figure 2 It is a structural schematic view of the energy-saving vertical boiling furnace of the embodiment of the utility model; Figure 1 It is an enlarged schematic view of I in the figure;

[0021] Figure 3 It is a top view of the air inlet channel and the furnace body of the embodiment of the utility model on the horizontal plane in the vertical direction.

[0022] The drawings: 100-energy-saving vertical boiling furnace, 10-furnace body, 11-combustion chamber, 12-air inlet channel, 13-air interlayer, 14-feeding port, 15-outlet, 16-air inlet, 20-conveying pipeline, 21-main pipeline, 22-branch pipeline, 30-recovery fan, 40-combustion fan, 50-equal pressure air bellow, 60-air distribution plate, 70-air cap, 80-air inlet pipeline. DETAILED DESCRIPTION

[0023] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0024] In the description of the present application, it should be noted that the directions or position relations indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are the directions or position relations shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as a limitation on the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0026] The present application will be described in further detail below in combination with the drawings.

[0027] Please refer to Figures 1 to 3 The energy-saving vertical boiling furnace 100 provided by the embodiments of the present application includes a furnace body 10, a conveying pipeline 20 and a recovery fan 30.

[0028] Among them, please refer to Figure 1 And Figure 2 The furnace body 10 is provided with a combustion chamber 11, the furnace wall of the furnace body 10 is provided with an air inlet channel 12 penetrating through the furnace wall, the furnace wall is provided with an air interlayer 13 along the circumference, and the air interlayer 13, the air inlet channel 12 and the combustion chamber 11 are sequentially communicated; the conveying pipeline 20 is connected to the furnace wall and communicates with the air interlayer 13; the recovery fan 30 is connected to the conveying pipeline 20 and used for conveying air to the conveying pipeline 20.

[0029] The energy-saving vertical boiling furnace 100 recovers the heat radiated from the furnace wall by arranging the air interlayer 13 on the furnace wall of the furnace body 10 and arranging the air inlet channel 12 penetrating through the furnace wall, so that the air fan 30 can send air into the air interlayer 13 through the conveying pipeline 20, the air interlayer 13 is arranged along the circumference of the furnace body 10, can receive the heat radiated from the furnace wall of the furnace body 10 in a large area, and then enters into the furnace body 10 through the air inlet channel 12, so that the heat radiated from the furnace wall is recovered, the heat utilization rate is improved, and energy is saved.

[0030] Please refer to Figure 1 In an embodiment of the present application, the furnace body 10 sequentially comprises a boiling section a, a suspension section b and a settling section c from bottom to top, the bottom of the boiling section a is provided with an air inlet 16, the sidewall of the suspension section b is provided with a feeding port 14, and the air interlayer 13 is located in the boiling section a, the suspension section b and the settling section c, so that the material is sent into the feeding port 14 of the suspension section b when burning, the material falls to the boiling section a for burning by gravity, the hot air flow and the suspended particles sequentially go up to the suspension section b and the settling section c, the particles are gradually settled in the settling section c, and the hot air flow flows out of the outlet 15 of the settling section c, for example, a cyclone dust collector can be connected at the outlet 15 to make the particles settle, so that the hot air flow and the particles are separated, and clean high-temperature hot air flow is obtained for use in a drying tower.

[0031] In addition, the boiling furnace of the present application further comprises a combustion-supporting fan 40, an equal-pressure air tank 50, a wind distribution plate 60 and a wind cap 70, the bottom of the boiling section a is provided with the air inlet 16, the wind distribution plate 60 is arranged at the air inlet 16, the wind cap 70 is connected to the wind distribution plate 60, the combustion-supporting fan 40 is used for inputting air flow into the equal-pressure air tank 50, for example, for inputting waste heat air of a kiln or a generator, dispersing the air flow through the equal-pressure air tank 50, dispersing the air flow through the wind distribution plate 60, and finally spraying the air flow into the boiling section a through the wind cap 70, the air flow scattered in all directions supports the fuel, such as slag, biomass fuel and other combustibles, in the form of a "gas cushion", the fuel is in a fluidized state and is boiled and burned, and jumps up and down in the boiling section a under the driving of the air flow, rubs against each other, collides and cracks, until the fuel is burned out, the fuel has a large contact area with air and a high relative movement speed when burning, and stays in the fluidized bed for a long time, so that the fuel has the characteristics of fast burning speed, high burnout rate, energy saving and environmental protection, and the like. The hot air flow drives the small particles to go up to the suspension section b and the settling section c after the fuel is burned, and the particles are settled in the settling section c.

[0032] In order to fully utilize the heat radiated from the furnace wall, the air interlayer 13 is located in the boiling section a, the suspension section b and the settling section c, so that the heat radiated from the entire furnace wall can be absorbed by air after heat exchange, and the heat utilization rate is fully improved.

[0033] Further, since the settling section c is provided with the outlet 15 and the hot gas flow is guided out, in the arrangement of the various furnace sections of the embodiment, the diameter of the boiling section a is gradually increased from bottom to top, the diameter of the suspension section b is kept constant, and the diameter of the settling section c is gradually decreased from bottom to top, so that the boiling section a with gradually increased diameter can increase the movement area of the fuel, and the fuel is fully dispersed by the gas flow to achieve the effect of full combustion, the particulate matter at the impact position enters the suspension section b and the settling section c in turn, and is settled by the blockage of the inner wall of the settling section c with gradually decreased diameter, and finally is discharged through the outlet 15 of the settling section c, since the diameter of the settling section c is gradually decreased, the effect of gathering the hot gas flow can be achieved to facilitate the concentrated use in the next step.

[0034] Among them, please refer to Figure 1 and Figure 2 In an embodiment of the utility model, when the air inlet channel 12 is arranged on the furnace wall, the air inlet channel 12 is arranged on the side wall of the suspension section b and the settling section c, that is, the boiling section a is not provided with the air inlet channel 12, if the boiling section a is provided with the air inlet channel 12, the air flow enters the boiling section a through the air inlet channel 12 to give the fuel in the boiling section a an impact force, which can make the fuel produce the foaming phenomenon, and the fuel will be upwardly impacted, which is not conducive to the combustion of the material.

[0035] Please refer to Figure 1 In an embodiment of the utility model, when the air inlet pipeline 80 is arranged, the conveying pipeline 20 includes the main pipeline 21 and a plurality of branch pipelines 22, the plurality of branch pipelines 22 are arranged from top to bottom in turn, one end of each branch pipeline 22 is communicated with the main pipeline 21, and the other end is communicated with the air interlayer 13, and the main pipeline 21 is communicated with the recovery air blower 30, so that the air flow conveyed from the recovery air blower 30 is conveyed through the main pipeline 21 and then dispersed into the branch pipelines 22 in turn, and the branch pipelines 22 flow into the air interlayer 13, since the plurality of branch pipelines 22 are arranged from top to bottom in turn, the input air can contact the furnace wall in a larger area to exchange heat with the heat radiated by the furnace wall, so that the effect of full heat recovery is achieved.

[0036] Specifically, one branch pipeline 22 is arranged at the bottom end of the boiling furnace, and the suspension section b and the settling section c are each provided with at least one branch pipeline 22, so that a large amount of heat is input into the air interlayer 13 to fully achieve the recycling of the heat.

[0037] Please refer to Figure 1 and Figure 2In an embodiment of the utility model, in order to guarantee the structural strength of furnace wall, energy-saving vertical boiling furnace 100 further includes multiple air inlet ducts 80, multiple air inlet ducts 80 and multiple air inlet channels 12 are one-to-one corresponding arrangement, and air inlet duct 80 is embedded in air inlet channel 12, namely after setting air inlet channel 12 on furnace wall, air inlet duct 80 is embedded in air inlet channel 12, air inlet duct 80 is used to support furnace wall, and the structural stability of furnace wall is increased, simultaneously, through the setting of air inlet duct 80, air flows into through the inner wall of air inlet duct 80, and the impact on furnace wall is avoided.

[0038] As shown in the figure, when air inlet channel 12 is set, air inlet channel 12 is set to be inclined downward, namely air inlet duct 80 is also set to be inclined downward, so that air flow can flow downward when being sent into furnace body 10, exchanges with hot air flow in furnace body 10, and after being heated, hot air flow flows out of furnace body 10 upward, thereby guaranteeing the consistency of air flow temperature flowing out of furnace body 10. Figure 2 Specifically, please refer to the figure

[0039] When air inlet channel 12 is set, the included angle θ between air inlet channel 12 and horizontal plane is 10-20 °, namely the inclination angle relative to horizontal plane is not too large, air flow is avoided from flowing in the direction of boiling section a and impacting fuel when the inclination angle is too large, and air flow is avoided from not being mixed with hot air flow in furnace body 10 sufficiently when the inclination angle is too small. Among them, the downward inclination angle can be set to 10 °, 13 °, 15 °, 18 ° or 20 °, and the like, which is not limited herein. Figure 2 Further, when inclined downward air inlet channel 12 is set, please refer to the figure

[0040] The projection of air inlet channel 12 on horizontal plane along vertical direction deviates from the radial direction of furnace body 10, namely the extension direction of air inlet channel 12 and the radial direction of furnace body 10 have an included angle α, air flow is avoided from being concentrated in the center of furnace body 10 after flowing into furnace body 10 along air inlet channel 12 when being set along the radial direction directly, therefore, the setting mode of air inlet channel 12 in the embodiment is that air flow is dispersed towards the wall surface of furnace body 10 after entering through air inlet channel 12, and multiple air inlet channels 12 are cooperated, which is equivalent to the effect that air flow is dispersed, so that air flow can be mixed with hot air flow in furnace body 10 sufficiently and then flows out. Figure 3 In some embodiments, the included angle α is 30-40 °, the deviation angle is avoided from being too large and directly impacting on furnace wall, and the deviation angle is avoided from being too small and being concentrated in the center direction of furnace body 10. For example, the deviation angle can be set to 30 °, 32 °, 35 °, 38 ° or 40 °, and the like, which is not limited herein.

[0041]

[0042] ​The energy-saving vertical boiling furnace 100, by setting air interlayer 13 on furnace body 10, the air in air interlayer 13 can absorb the heat radiated by furnace wall, and then recycled to furnace body 10 through air inlet channel 12, fully utilize the heat, improve energy utilization rate;By the way of setting the angle between air inlet channel 12 and horizontal plane, so that the air flow can flow downward when being sent into furnace body 10, exchange with the hot air flow in furnace body 10, and then flow out of furnace body 10 after being heated, so as to ensure the consistency of the air flow temperature flowing out of furnace body 10;By setting the projection of air inlet channel 12 on the horizontal plane in the vertical direction to deviate from the radial direction of furnace body 10, avoid the air flow concentrated in the center of furnace body 10 after flowing into furnace body 10 along air inlet channel 12 when being set directly along the radial direction.

[0043] The technical means disclosed by the utility model scheme is not limited to the technical means disclosed by the above-mentioned embodiments, and also includes the technical scheme composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. An energy-saving vertical fluidized bed furnace (100), characterized in that, include: The furnace body (10) is provided with a combustion chamber (11). The furnace wall of the furnace body (10) is provided with an air inlet channel (12) that runs through the furnace wall. An air jacket (13) is provided on the furnace wall along the circumference. The air jacket (13), the air inlet channel (12), and the combustion chamber (11) are connected in sequence. The conveying pipe (20) is connected to the furnace wall and communicates with the air jacket (13); A recovery fan (30) is connected to the conveying pipe (20) for conveying air into the conveying pipe (20).

2. The energy-saving vertical fluidized bed furnace (100) according to claim 1, characterized in that, The furnace body (10) includes a boiling section, a suspension section and a settling section from bottom to top. The side wall of the suspension section is provided with a feed inlet (14). The air jacket (13) is located in the boiling section, the suspension section and the settling section.

3. The energy-saving vertical fluidized bed furnace (100) according to claim 2, characterized in that, Air inlet channels (12) are provided on the side walls of the suspension section and the settling section.

4. The energy-saving vertical fluidized bed furnace (100) according to claim 2, characterized in that, The diameter of the boiling section gradually increases from bottom to top; The diameter of the suspended section remains constant; The diameter of the settling section decreases from bottom to top.

5. The energy-saving vertical fluidized bed furnace (100) according to any one of claims 1-4, characterized in that, The conveying pipeline (20) includes a main pipeline (21) and multiple branch pipelines (22). The multiple branch pipelines (22) are arranged sequentially from top to bottom. One end of each branch pipeline (22) is connected to the main pipeline (21), and the other end is connected to the air interlayer (13). The main pipeline (21) is connected to the recovery fan (30).

6. The energy-saving vertical fluidized bed furnace (100) according to any one of claims 1-4, characterized in that, The vertical fluidized bed furnace (100) also includes multiple air inlet pipes (80), and the multiple air inlet pipes (80) and multiple air inlet channels (12) are arranged in a one-to-one correspondence, with the air inlet pipes (80) embedded in the air inlet channels (12).

7. The energy-saving vertical fluidized bed furnace (100) according to any one of claims 1-4, characterized in that, The air inlet channel (12) is inclined downward.

8. The energy-saving vertical fluidized bed furnace (100) according to claim 7, characterized in that, The angle between the air intake channel (12) and the horizontal plane is in the range of 10-20°.

9. The energy-saving vertical fluidized bed furnace (100) according to claim 7, characterized in that, The projection of the air inlet channel (12) in the vertical direction onto the horizontal plane deviates from the radial direction of the furnace body (10).

10. The energy-saving vertical fluidized bed furnace (100) according to any one of claims 1-3, characterized in that, The vertical fluidized bed furnace (100) also includes a combustion-supporting fan (40) for inputting waste heat air.

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