Multi-section producer for pyrolysis and gasification of organic solid waste

Abstract

The invention discloses a multi-section producer for pyrolysis and gasification of organic solid waste, the multi-section producer comprises a transmission pipe and an upper cylinder, the transmission pipe is communicated to the upper part of the upper cylinder, the lower part of the upper cylinder is connected with a lower cylinder, the lower part of the lower cylinder is connected with a fence, and a discharging cylinder is arranged in the fence; an inner cylinder is fixed in the lower cylinder, an interlayer is arranged between the lower cylinder and the inner cylinder, and a plurality of circles of exhaust holes penetrating through the interlayer are formed in the side wall of the inner cylinder; an inner pipe extending to the center of the inner barrel is fixed to the center of the discharging barrel, and an air outlet seam is formed in the side wall of the inner pipe. The side wall of the upper part of the upper cylinder is connected with a top gas pipe, the side wall of the lower cylinder is connected with a bottom gas pipe penetrating to the interlayer, and the lower end of the inner pipe is connected with a gas inlet pipe; compared with the prior art, efficient, stable and low-carbon operation of organic solid waste energy treatment is achieved, and reliable technical equipment support is provided for solid waste recycling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel pyrolysis, in particular to a multi-section generating furnace for organic solid waste pyrolysis gasification. BACKGROUND

[0002] The urbanization process has given birth to a large amount of organic solid waste, and traditional landfill has occupied land resources, and incineration has released dioxin and other toxic substances. Pyrolysis gasification technology converts solid waste into clean fuel gas and inert residues through anoxic environment, and is considered as the core path of green transformation.

[0003] The fixed bed gasification furnace adopts a static layering feeding method, and the gasifying agent penetrates the material layer in one direction. Its structure is simple, but the reaction efficiency is sacrificed - the central area forms slag due to excessive combustion, and the edge material remains a large amount of unreacted carbon due to insufficient gas supply, and the calorific value of the fuel gas fluctuates greatly. The fluidized bed gasification furnace relies on high-speed airflow to lift solid waste particles to achieve dynamic mixing. Although the heat transfer efficiency is improved, the escape of fine particles increases the dust removal cost, and the continuous high energy consumption to maintain the fluidized state weakens the economy. More fatally, the reaction gas carries ash and adheres to the exhaust structure, which needs to be manually unblocked every week. The single-section rotary furnace tries to improve the mixing effect by rotating the entire cylinder. However, due to the lack of internal active stirring, only the surface of the material is turned over, and the deep layer still has dead zones; at the same time, the open type slagging design destroys the stability of the gasification atmosphere, and the tar content in the fuel gas is high.

[0004] Therefore, it is necessary to provide a multi-section generating furnace for organic solid waste pyrolysis gasification to solve the problems raised in the background art. SUMMARY

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a multi-section generating furnace for organic solid waste pyrolysis gasification, comprising a conveying pipe and an upper cylinder, the conveying pipe being communicated to the upper side of the upper cylinder, the lower side of the upper cylinder being connected with a lower cylinder, the lower side of the lower cylinder being connected with a surrounding fence, and a discharging cylinder being arranged in the surrounding fence;

[0006] An inner cylinder is fixed in the lower cylinder, and a sandwich layer is formed between the lower cylinder and the inner cylinder, a plurality of exhaust holes are formed in the side wall of the inner cylinder and penetrate the sandwich layer;

[0007] An inner pipe is fixed in the center of the discharging cylinder and extends to the center of the inner cylinder, and a gas outlet slot is formed in the side wall of the inner pipe;

[0008] A top combustion gas pipe is connected to the side wall of the upper part of the upper cylinder, a bottom combustion gas pipe penetrates the sandwich layer and is connected to the side wall of the lower cylinder, and an air inlet pipe is connected to the lower end of the inner pipe.

[0009] Further, as a preferred, a plurality of stirring rods are rotatably arranged between the side wall of the inner cylinder and the inner pipe, one end of the stirring rod penetrates the outer wall of the inner cylinder and is fixed with a bevel gear;

[0010] The outer wall of the inner cylinder is rotationally provided with a rotating cylinder, and the inner wall of the rotating cylinder is fixedly provided with multiple rows of bevel gears.

[0011] Further, as a preferred, the side wall of the rotating cylinder is provided with multiple through holes.

[0012] Further, as a preferred, each of the stirring rods respectively penetrates each of the exhaust holes, and the outer wall of the stirring rod in the exhaust hole is provided with spiral blades.

[0013] Further, as a preferred, the lower part of the inner cylinder is rotationally provided with a rotating ring, and the periphery of the lower part of the rotating ring is provided with multiple blades of scrapers extending into the discharging cylinder.

[0014] The side wall of the discharging cylinder is provided with multiple sections of discharging ports.

[0015] Further, as a preferred, the lower part of the fence is provided with a discharging box. The ash material discharged from the discharging port of the discharging cylinder falls into the discharging box.

[0016] Further, as a preferred, the edge of the rotating ring is provided with a gear ring, the side wall of the lower cylinder is provided with a driving motor, the driving motor is connected to a driving gear, the driving gear is rotatably embedded into the side wall of the lower cylinder and engaged with the gear ring of the edge of the rotating ring.

[0017] Further, as a preferred, the lower end of the rotating cylinder is fixed to the rotating ring.

[0018] Further, as a preferred, a piston is slidingly arranged in the inner tube.

[0019] Further, as a preferred, a guide shaft is fixed in the inner tube, the guide shaft slidingly penetrates the piston, a lead screw is rotationally arranged at the center of the inner tube, the lead screw is threadedly connected with the piston, and the lower end of the lead screw is connected to a lead screw motor.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] In the present application, through the hierarchical gasification design, the gasification agent is accurately injected into the hot semi-coke layer to generate high-energy bottom combustion gas and top combustion gas rich in volatile matter. The distribution height of the gasification agent can be flexibly adjusted to adapt to different characteristics of organic solid waste, ensuring the synchronous optimization of gas production and calorific value. The top combustion gas preheats the newly incoming material during the rising process, realizing the hierarchical utilization of heat energy.

[0022] In the present application, multiple rows of self-rotating stirring rods realize three-dimensional tumbling of the material, eliminate reaction dead angles, clean the exhaust holes during the stirring process, continuously push back the blocked particles through the specially designed spiral blades, ensure the smoothness of the gas outlet channel, improve the uniformity of material heating and reaction, and significantly reduce the carbon content of residues. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a multi-stage generating furnace for organic solid waste pyrolysis gasification;

[0024] Figure 2 It is a semi-sectional structural schematic diagram of a multi-stage generating furnace for organic solid waste pyrolysis gasification;

[0025] Figure 3 It is a sectional structural schematic diagram of a multi-stage generating furnace for organic solid waste pyrolysis gasification;

[0026] Figure 4 It is a cross-sectional structural schematic diagram of the enclosure;

[0027] Figure 5 It is a cross-sectional structural schematic diagram of the inner cylinder;

[0028] In the figure: 1, conveying pipe; 2, upper cylinder; 21, top combustion gas pipe; 3, lower cylinder; 31, bottom combustion gas pipe; 4, enclosure; 41, discharge cylinder; 42, rotating ring; 43, scraper; 44, gas inlet pipe; 5, discharge box; 6, inner pipe; 61, piston; 62, guide shaft; 63, screw rod; 64, screw rod motor; 7, inner cylinder; 71, interlayer; 72, rotating drum; 73, stirring rod; 74, bevel gear; 75, bevel gear ring; 76, exhaust hole; 77, spiral blade; 8, driving motor; 81, driving gear. DETAILED DESCRIPTION

[0029] Please refer to Figures 1-5 In the embodiment of the present application, a multi-stage generating furnace for organic solid waste pyrolysis gasification includes a conveying pipe 1 and an upper cylinder 2, the conveying pipe 1 is connected to the upper side of the upper cylinder 2, the lower side of the upper cylinder 2 is connected with a lower cylinder 3, the lower side of the lower cylinder 3 is connected with an enclosure 4, and the enclosure 4 is provided with a discharge cylinder 41;

[0030] The inner cylinder 7 is fixed in the lower cylinder 3, and the interlayer 71 is formed between the lower cylinder 3 and the inner cylinder 7, and a plurality of exhaust holes 76 penetrating the interlayer 71 are formed in the side wall of the inner cylinder 7;

[0031] The inner pipe 6 extending to the center of the inner cylinder 7 is fixed in the center of the discharge cylinder 41, and a gas outlet slot is formed in the side wall of the inner pipe 6;

[0032] The top combustion gas pipe 21 is connected to the side wall of the upper part of the upper cylinder 2, the bottom combustion gas pipe 31 penetrating the interlayer 71 is connected to the side wall of the lower cylinder 3, and the gas inlet pipe 44 is connected to the lower end of the inner pipe 6.

[0033] Organic solid waste particles are introduced into the upper cylinder 2 and the inner cylinder 7 through the transmission pipe 1, and saturated gas composed of low-pressure steam and blast air as a gasification agent is introduced into the inner cylinder 7 from the air inlet pipe 44 through the inner pipe 6 from the air outlet gap, and the gasification agent and the hot semi-coke formed by the organic solid waste are subjected to a gasification reaction to generate biomass fuel gas, part of which is discharged from the interlayer 71 through the bottom fuel gas pipe through the exhaust hole 76 in the side wall of the inner cylinder 7, forming bottom fuel gas; the remaining fuel gas directly heats, dries and carbonizes the organic solid waste in the upper cylinder 2, and is discharged from the top fuel gas pipe 21 to form top fuel gas.

[0034] In this embodiment, a plurality of stirring rods 73 are rotatably arranged between the side wall of the inner cylinder 7 and the inner pipe 6, one end of the stirring rod 73 penetrates the outer wall of the inner cylinder 7 and is fixed with a bevel gear 74;

[0035] The outer wall of the inner cylinder 7 is rotatably provided with a rotating cylinder 72, and the inner wall of the rotating cylinder 72 is fixed with a plurality of bevel gear rings 75, and each bevel gear ring 75 is engaged into each bevel gear 74.

[0036] That is, when the rotating cylinder 72 rotates, it can drive each of the stirring rods 73 to rotate synchronously, so that the organic solid waste particles in the inner cylinder 7 can be stirred, so that the organic solid waste particles can be uniformly burned to ensure that the fuel gas can be fully released.

[0037] In this embodiment, a plurality of through holes are formed in the side wall of the rotating cylinder 72. The bottom fuel gas discharged from the exhaust hole 76 can pass through the through holes to be discharged from the bottom fuel gas pipe 31.

[0038] In this embodiment, each of the stirring rods 73 penetrates each of the exhaust holes 76, and the outer wall of the stirring rod 73 in the exhaust hole 76 is provided with a spiral blade 77.

[0039] The spiral blade 77 is a non-continuous blade, so the fuel gas can pass between the spiral blades 77, and when the stirring rod 73 rotates to stir the organic solid waste particles in the inner cylinder 7, the spiral blade 77 will push the organic solid waste particles in the exhaust hole 76 back into the inner cylinder 7, avoiding the discharge of the organic solid waste particles from the exhaust hole 76, which can not only avoid blockage, but also improve the exhaust efficiency.

[0040] In this embodiment, a rotating ring 42 is rotatably arranged below the inner cylinder 7, and a plurality of scrapers 43 extending into the discharge cylinder 41 are distributed around the lower part of the rotating ring 42;

[0041] A plurality of discharge openings are formed in the side wall of the discharge cylinder 41.

[0042] That is, the ash after combustion falls from the inner cylinder 7 to the discharge cylinder 41, and when the rotating ring 42 rotates, the ash in the discharge cylinder 41 will be gradually scraped away and discharged from the discharge opening, which can avoid the ash being discharged too quickly to cause insufficient combustion or being discharged too slowly to cause accumulation.

[0043] In the embodiment, a discharge box 5 is placed below the enclosure 4. The ash discharged from the side wall outlet of the discharge cylinder 41 falls into the discharge box 5.

[0044] In the embodiment, a gear ring is formed on the edge of the rotating ring 42, a driving motor 8 is arranged on the side wall of the lower cylinder 3, the driving motor 8 is connected to a driving gear 81, and the driving gear 81 is rotatably embedded in the side wall of the lower cylinder 3 and engaged with the gear ring on the edge of the rotating ring 42.

[0045] The rotating ring 42 can be driven to rotate by the driving motor 8 to discharge.

[0046] In the embodiment, the lower end of the rotating cylinder 72 is fixed to the rotating ring 42.

[0047] That is, when the rotating ring 42 rotates to discharge, the rotating ring 42 rotates to drive each stirring rod 73 to rotate.

[0048] In the embodiment, a piston 61 is slidably arranged in the inner tube 6.

[0049] By changing the height of the piston 61, the height of the gasification agent discharged from the air gap of the inner tube 6 can be adjusted to adapt to different combustion conditions.

[0050] In the embodiment, a guide shaft 62 is fixed in the inner tube 6, the guide shaft 62 slidably penetrates the piston 61, a lead screw 63 is rotatably arranged in the center of the inner tube 6, the lead screw 63 is threadedly connected with the piston 61, and the lower end of the lead screw 63 is connected to a lead screw motor 64.

[0051] That is, by driving the lead screw 63 to rotate through the lead screw motor 64, the height of the piston 61 can be adjusted.

[0052] In specific implementation, low-pressure steam and blast air are mixed in a process ratio to form saturated gasification agent, which is connected to the air inlet pipe 44, and organic solid waste particles are poured into the upper cylinder 2 through the conveying pipe 1, naturally fall into the inner cylinder 7, and the feeding rate is controlled to avoid excessive accumulation affecting the gasification efficiency.

[0053] The saturated gasification agent rises through the inner tube 6, enters the inner cylinder 7 through the side wall air gap, the lead screw motor 64 drives the lead screw 63 to rotate, drives the piston 61 to ascend and descend along the guide shaft 62, controls the exposure height of the air gap, and adapts to the reaction requirements of different solid wastes.

[0054] The gasification agent and the hot semi-coke in the inner cylinder 7 undergo a gasification reaction to generate biomass gas: part of the gas enters the interlayer 71 through the exhaust hole 76, passes through the through hole of the rotating cylinder 72, and is discharged through the bottom gas pipe 31; the remaining gas rises to the upper cylinder 2, dries and dry distills the raw materials, and is discharged from the top gas pipe 21;

[0055] The driving motor 8 drives the rotating ring 42 to rotate, the rotating drum 72 rotates synchronously, the bevel gear 74 is driven by the bevel gear ring 75, the stirring rod 73 rotates to uniformly turn the solid waste particles, and the non-continuous spiral blade 77 on the stirring rod 73 pushes the particles blocking the exhaust hole 76 back to the inner cylinder 7 with the rotation, so that the exhaust hole 76 is ensured to be unblocked.

[0056] After the reaction, the ash falls into the discharging cylinder 41, the rotating ring 42 drives the scraper 43 to rotate, and the ash is uniformly scraped to the discharging port on the side wall of the discharging cylinder 41, so that the ash is prevented from being accumulated or discharged too quickly.

[0057] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A multi-stage generator for pyrolysis gasification of organic solid waste, comprising a transfer pipe (1) and an upper cylinder (2), characterized in that, The transmission pipe (1) is connected to the top of the upper cylinder (2), and the lower cylinder (3) is connected below the upper cylinder (2). The lower cylinder (3) is connected to the bottom of the enclosure (4), and the discharge cylinder (41) is provided inside the enclosure (4). The lower cylinder (3) is fixed with an inner cylinder (7), and there is a sandwich layer (71) between the lower cylinder (3) and the inner cylinder (7). The inner cylinder (7) has multiple vent holes (76) that extend into the sandwich layer (71) on its side wall. The discharge cylinder (41) has an inner tube (6) that extends to the center of the inner cylinder (7) and the side wall of the inner tube (6) has an air outlet slit. The upper side wall of the upper cylinder (2) is connected to the top gas pipe (21), the lower side wall of the lower cylinder (3) is connected to the bottom gas pipe (31) that extends to the interlayer (71), and the lower end of the inner pipe (6) is connected to the air inlet pipe (44).

2. A multi-stage generator for pyrolysis gasification of organic solid waste according to claim 1, characterized in that, Multiple stirring rods (73) are rotatably arranged between the inner cylinder (7) and the side wall of the inner tube (6). One end of the stirring rod (73) extends through the outer wall of the inner cylinder (7) and is fixed with a bevel gear (74). The outer wall of the inner cylinder (7) is rotatably provided with a rotating cylinder (72), and the inner wall of the rotating cylinder (72) is fixed with multiple bevel gear rings (75), each bevel gear ring (75) meshing into each bevel gear (74).

3. A multi-stage generator for pyrolysis gasification of organic solid waste according to claim 2, characterized in that, The rotating drum (72) has multiple through holes on its side wall.

4. A multi-stage generator for pyrolysis gasification of organic solid waste according to claim 2, characterized in that, Each of the stirring rods (73) passes through each vent hole (76), and the stirring rods (73) have spiral blades (77) distributed on the outer wall inside the vent hole (76).

5. A multi-stage generator for pyrolysis gasification of organic solid waste according to claim 2, characterized in that, A rotating ring (42) is rotatably disposed below the inner cylinder (7), and multiple scrapers (43) extending into the discharge cylinder (41) are distributed around the lower part of the rotating ring (42). The side wall of the discharge cylinder (41) has multiple discharge ports.

6. A multi-stage generator for pyrolysis gasification of organic solid waste according to claim 1, characterized in that, A discharge box (5) is placed below the enclosure (4). The ash material discharged from the discharge port on the side wall of the discharge cylinder (41) falls into the discharge box (5).

7. A multi-stage generator for pyrolysis gasification of organic solid waste according to claim 5, characterized in that, The swivel ring (42) has a toothed ring on its edge, and the lower cylinder (3) has a drive motor (8) on its side wall. The drive motor (8) is connected to a drive gear (81), which is rotatably embedded in the side wall of the lower cylinder (3) and meshes with the toothed ring on the edge of the swivel ring (42).

8. A multi-stage generator for pyrolysis gasification of organic solid waste according to claim 5, characterized in that, The lower end of the rotating cylinder (72) is fixed to the rotating ring (42).

9. A multi-stage generator for pyrolysis gasification of organic solid waste according to claim 1, characterized in that, A piston (61) is slidably disposed inside the inner tube (6).

10. A multi-stage generator for pyrolysis gasification of organic solid waste according to claim 9, characterized in that, A guide shaft (62) is fixed inside the inner tube (6). The guide shaft (62) slides through the piston (61). A lead screw (63) is rotatably installed in the center of the inner tube (6). The lead screw (63) is threadedly connected to the piston (61). The lower end of the lead screw (63) is connected to the lead screw motor (64).

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