CN2401554Y - Stalk gasifying furnace - Google Patents

Abstract

The utility model relates to a stalk gasifying furnace which relates to a gasifying furnace designed for solving the problem that the heat utilization efficiency of the present stalk gasifying furnace is lower, the combustion heat of the produced combustible gas is low, and the dust in the combustible gas abstracted from the furnace by a draught fan is much. The furnace body of the furnace is a double-layer furnace body with a cavity in the middle, wherein the cavity is filled with water. When the furnace is ignited, the steam generated by the heated water is communicated with a hearth through an air duct 16. An air inlet pipe 5 is installed in the cavity. The air inlet pipe is downwards connected with an air inlet 13 and is connected upwards to a gas inlet 14. A circular column cover 9 is installed beside a combustible gas inlet 17 below a grate 3. The utility model is mainly used for producing combustible gas with the stalk in the country. The stalk gasifying furnace has the advantages of high heat utilization efficiency, high combustion heat of the produced combustible gas, little dust in combustible gas, etc.

Description

Stalk gasifier

The utility model relates to a kind of vapourizing furnace.

Up to the present, generally speaking, after the farm crop results, crop material is directly burned in the farmland, and this easy initiation fire pollutes atmosphere again; Nearly one or two years, the gasifying stalk technology tentatively is applied as far as our knowledge goes, now used stalk gasifier is by the hollow cylinder body of heater that has thermal insulation layer, the body of heater upper end has the bell and the intravital fire grate of stove of opening for feed and forms, fire grate at the hollow cylinder body of heater is shaped on inlet mouth with top, is shaped on mixed combustible gas outlet and ash output hole at fire grate with the lower section; Add straw during use on the intravital fire grate of stove, light then, with blower fan the mixed combustible gas that produces in the body of heater is got final product from mixed combustible gas outlet extraction, the stalk ash that the burning back forms is discharged from ash output hole.Lower with inflammable gas content in the mixed combustible gas of this stalk gasifier generation, cause this mixed combustible gas combustion heat on the low side; Blower fan is bled the dust behind the straw burning when inflammable mixture is extracted out easily together; Simultaneously to remove mistake from body of heater bigger for the heat that produces when burning straw of this stalk gasifier, and heat utilization efficiency is lower.

The purpose of this utility model is to provide a kind of mixed combustible gas that can produce than heats of combustion, and mixed combustible gas is taken dust out of when extracting out less, the stalk gasifier that heat utilization efficiency is higher.

For achieving the above object, the utility model adopts following technical scheme: this stalk gasifier is made up of the hollow cylinder body of heater, bell and the fire grate that cover thermal insulation layer outward.Level is equipped with fire grate in body of heater, circular bell is installed in the upper surface of body of heater, on bell, be shaped on opening for feed and steam entry, on the hollow cylinder body of heater, be shaped on water container, water container upper end is shaped on steam outlet, and this steam outlet links to each other with steam entry on the stalk gasifier bell by conduit; The hollow cylinder body of heater above the steam outlet of water container circumference on uniform distribution be shaped on inlet mouth more than 2, in body of heater above the fire grate, be shaped on a gather qi together loudspeaker ring with the body of heater coaxial line near fire grate, this loudspeaker ring is less near fire grate end diameter, its the other end is identical with the body of heater internal diameter, and be fixed on the inboard wall of furnace body, be shaped on the mixed combustible gas outlet on the body of heater in body of heater below the fire grate, in body of heater, export identical level attitude with mixed combustible gas, with body of heater coaxial line system one diameter less than the grey air bound of warp in the body of heater from cylindrical sleeve, this cylindrical sleeve enlarges gradually at nearly fire grate end diameter, form the hydraucone identical with the body of heater internal diameter, this hydraucone is fixed on the inwall of fire grate below body of heater, this cylindrical sleeve the other end diameter also enlarges gradually, form the hydraucone of diameter less than the body of heater internal diameter, with the web plate more than 2 that is evenly distributed on its hydraucone end face the hydraucone end face is fixed on the inboard wall of furnace body, the mixed combustible gas outlet just has bell-mouthed grey air bound on the pairing body of heater of the column part of cylindrical sleeve at two ends, has bell-mouthed grey air bound to be shaped on the water inlet pipe and the rising pipe of ash output hole and water container on the body of heater below the cylindrical sleeve at two ends.

The utility model stalk gasifier is compared with present employed stalk gasifier has following beneficial effect: (1) this stalk gasifier is shaped on water container on body of heater, the thermal change that water in the water container absorbs the straw burning generation becomes water vapor, water vapor participates in the gasifying stalk process, make that combustible gas content increases in the mixed combustible gas of generation, thereby improve the combustion heat of inflammable mixture; Water in the water container also plays certain insulation effect simultaneously, reduces and removes the heat of mistake from body of heater, improves the heat utilization efficiency of stalk gasifier; (2) the utility model is in the body of heater under the fire grate, with mixed combustible gas outlet par position two ends are installed and bell-mouthed grey air bound are arranged from cylindrical sleeve, this has played certain interior heat of fire grate lower furnace body that prevents and has removed the effect of mistake from body of heater, make the gasification zone wall thickening of stalk gasifier, thereby improved the amount of vaporization of stalk; Mixed combustible gas because of the air-flow U-shaped flows, has reduced the content of dust in the mixed combustible gas of extracting out when extracting out by the mixed combustible gas outlet simultaneously.(3) be shaped on a gather qi together loudspeaker ring with the body of heater coaxial line near fire grate in the body of heater of the utility model above fire grate, this ring can make stalk be fully burned on the one hand and gather the ash effect, can prevent from the other hand in the body of heater directly to enter gasification zone under the fire grate without the combustion zone of fire grate top than the air of lower part near the temperature of furnace body wall, thereby improve the composition of mixed combustible gas, make in the mixed combustible gas content of combustible gas higher, reach the purpose that increases the mixed combustible gas combustion heat.

Below, by embodiment and accompanying drawing the utility model stalk gasifier is described further.

Fig. 1 is the sectional view of the utility model stalk gasifier.

Cut open this along the plane of symmetry of stalk gasifier and install resulting sectional view and be Fig. 1, with reference to Fig. 1, this stalk gasifier is made up of body of heater 1, bell 2, fire grate 3 and insulating layer of furnace body 4; Body of heater 1 is a hollow cylinder, in body of heater level movable furnace grate 3 is installed, circular bell 2 is installed in the upper surface of body of heater, is shaped on opening for feed 21 and steam entry 22 and porthole 23 on bell 2; Hollow cylinder body of heater 1 is made up of the body of heater shell 11 and the body of heater inner casing 12 of coaxial line different diameter, forms cavity between body of heater shell 11 and the body of heater inner casing 12, and body of heater shell 11 and body of heater inner casing 12 upper and lower end faces are shut; On the circumference that is positioned at the body of heater shell 11 of fire grate below 3, be evenly distributed with 8 gas inlets 13, one end tube head of the inlet pipe 5 in the cavity between body of heater shell 11 and the body of heater inner casing 12 is housed and places in this gas inlet 13, on the other end tube head of inlet pipe 5 and the body of heater inner casing 12 closely on the circumference of upper end portion equally distributed 8 inlet mouths 14 be connected; Be shaped on the liquidometer 6 that is communicated with cavity between body of heater shell 11 and the body of heater inner casing 12 on the body of heater shell 11 of fire grate 3 planes with top, be shaped on steam outlet 15 at liquidometer 6 with the body of heater shell 11 on top, the steam guiding tube 16 of this steam outlet 15 by being connected to Y-junction links to each other with steam entry 22 on the straw gasification stove bell 2, and Y-junction connects snifting valve 7 with conduit; In body of heater 1, fire grate 3 tops are shaped on a gather qi together loudspeaker ring 8 with the body of heater coaxial line near fire grate 3, this loudspeaker ring 8 is less near fire grate 3 end diameters, its the other end is identical with body of heater inner casing 12 internal diameters, and be fixed on body of heater inner casing 12 inwalls, in the body of heater 1 below fire grate 3, with the body of heater coaxial line be shaped on a diameter less than the grey air bound of body of heater inner casing 12 internal diameters from cylindrical sleeve 9, this cylindrical sleeve 9 enlarges gradually at nearly fire grate 3 end diameters, form and the identical hydraucone of body of heater inner casing 12 internal diameters, and be fixed on the inwall of body of heater inner casing 12 of fire grate 3 belows, these cylindrical sleeve 9 the other end diameters also enlarge gradually, form the hydraucone of diameter, the hydraucone end face is fixed on body of heater inner casing 12 inwalls with 3 identical web plates 91 that are evenly distributed on its hydraucone end face less than body of heater inner casing 12 internal diameters; At grey air bound on the body of heater between the hydraucone at cylindrical sleeve 9 two ends, pass the inside and outside shell of body of heater, be shaped on mixed combustible gas air outlet 17, on the body of heater below this cylindrical sleeve 9, pass the body of heater inside and outside shell, be shaped on ash output hole 18, on the body of heater shell of nearly body of heater lower surface, also be shaped on water inlet pipe 19 and the rising pipe 20 that has valve.

The material of the thermal insulation layer 4 of this stalk gasifier embodiment is a rock wool, liquidometer 6 usefulness standard cock glass-tube liquid level meters, and other material is iron and steel.

Before the use, the tank that mounting height is highly identical with liquidometer 6 upper ends is connected with the water inlet pipe 19 of stalk gasifier lower end with conduit, then from tank water filling in the body of heater shell 11 of stalk gasifier and the cavity between the body of heater inner casing 12, till tank is filled with water (at this moment, the water surface peaks in the liquidometer 6); Then mixed combustible gas air outlet on the gasifying stalk furnace body 1 17 and stove outer rapid condensation device, fly-ash separator, roots blower are linked in sequence; During use, on by worm conveyor stalk being delivered to fire grate 3 in the gasifying stalk furnace body from the opening for feed 21 on the stalk gasifier bell 2, light stalk from porthole 23, start roots blower simultaneously, can in the body of heater under the fire grate, produce mixed combustible gas after 2-3 minute, about 10 minutes between body of heater shell 11 and the body of heater inner casing 12 water in the cavity can produce steam, and participate in the straw gasifying process from the steam entry 22 input stalk gasifiers on the bell through steam guiding tube 16.When the water vapor amount that produces is excessive, can open the snifting valve 7 that is connected with steam guiding tube 16 and let out vapour, when liquidometer 12 shown liquid levels are lower than the liquidometer lower-most point, should add water to the liquidometer vertex by the cavity of tank between body of heater inner casing 12 and body of heater shell 11; When straw gasification stove does not use for a long time, should open the valve port on the rising pipe 20 of body of heater below, drainage water, and the cavity between body of heater shell 11 and the body of heater inner casing 12 cleaned.

Claims (4)

1, stalk gasifier is by body of heater (1), bell (2), the thermal insulation layer (4) that fire grate (3) and body of heater cover is outward formed, fire grate (3) is installed on the horizontal plane of middle hypomere in the hollow cylinder body of heater (1), the circular bell (2) that is shaped on opening for feed (21) is installed in the upper surface of body of heater, on the circumference of fire grate (3) with top of hollow cylinder body of heater (1), be evenly distributed with 2 above inlet mouths (14), fire grate (3) is shaped on ash output hole (18) and mixed combustible gas outlet (17) with the lower section, it is characterized in that being shaped on steam entry (22) on the described bell (2) that has opening for feed (21), be shaped on water container on the described hollow cylinder body of heater, be shaped on water-in on the water container, water outlet and steam outlet, this steam outlet links to each other with steam entry (22) on the stalk gasifier bell (2) by steam guiding tube (16), fire grate in body of heater (3) top, be shaped on a gather qi together loudspeaker ring (8) near fire grate (3), gather qi together loudspeaker ring (8) is less near fire grate (3) end diameter, its the other end is identical with the body of heater internal diameter, and be fixed on the inboard wall of furnace body, fire grate in body of heater (3) below exports (17) identical level attitude with mixed combustible gas on the body of heater of described fire grate (3) bottom, with body of heater coaxial line system one diameter less than the grey air bound of body of heater internal diameter from cylindrical sleeve (9), this cylindrical sleeve (9) enlarges gradually at nearly fire grate (3) end diameter, form the hydraucone identical with the body of heater internal diameter, this hydraucone is fixed on the inboard wall of furnace body of fire grate (3) below, this cylindrical sleeve (9) the other end diameter also enlarges gradually, form the hydraucone of diameter less than the body of heater internal diameter, with the web plate more than 2 (91) that is evenly distributed on its hydraucone end face hydraucone is fixed on the inboard wall of furnace body, mixed combustible gas outlet (17) has bell-mouthed grey air bound on the pairing body of heater of column part (1) of cylindrical shell (9) built in two ends; The ash output hole (18) of described fire grate (3) below has bell-mouthed grey air bound on the bottom body of heater of cylindrical sleeve (9) built in two ends.

2, stalk gasifier according to claim 1, it is characterized in that described hollow cylinder body of heater (1) is by coaxial line, the body of heater shell (11) of different diameter and body of heater inner casing (12) are formed, and on body of heater shell (11) and body of heater inner casing (12), shut at following two ends, form cavity between body of heater shell (11) and the body of heater inner casing (12), on body of heater shell (11), be shaped on steam outlet (15) and the body of heater inner casing (12) and be shaped on inlet mouth (14) near the body of heater upper end, this cavity is described water container, and the steam outlet (15) on the body of heater shell (11) is exactly the steam outlet of water container; Uniform distribution is shaped on and the described corresponding gas inlet of inlet mouth (14) (13) that is positioned at body of heater inner casing (12) upper end on the circumference of the body of heater shell (11) below fire grate (3), place the two ends of the inlet pipe (5) in the cavity between body of heater shell (11) and the body of heater inner casing (12), connect together with corresponding gas inlet (13) and inlet mouth (14).

3, stalk gasifier according to claim 1 and 2 is characterized in that being shaped on body of heater axis parallel liquidometer (12) with top, steam outlet (15) with the last water container that is communicated with of the body of heater shell (11) of lower section at the described fire grate (3) that is positioned at.

4,, it is characterized in that described equally distributed 2 above inlet mouths (14) are 8 according to claim 1,2 described stalk gasifiers.

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