CN2133768Y - Directly heating hot-blast stove - Google Patents

Abstract

The utility model relates to a directly heating hot blast furnace, a cylinder tubular combustion chamber is arranged and the chaff and the wood dust are the fuel. The fuel is sent into the furnace to do suspension combustion in tangential direction from the upper end of the cylinder tubular of the combustion chamber with human power, the glowing gas generated during the combustion, almost smokeless, dustless, and non-poisonous through the a plurality of dust removals, can directly be the baking media of the fodder, the chemical material and the wood. Because of the complete combustion, no heat exchange is needed. Thus, the utility model is a high efficiency energy conservation product, and has the advantage of high thermal efficiency.

Description

Directly heating hot-blast stove

The utility model belongs to the hot-air stove that dried material is used

From ancient times to the present, the buring solid fuel example: the combustion furnace of usefulness such as firewood, wood chip, husk, coal all is made up of grate and stove hall, fuel is delivered on the grate in the stove hall, air enters Lu Tang through grate below grate, airborne oxygen contacts with red-hot fuel, so fuel just burns, can produce heat and gas during fuel combustion, the heat that is produced at first heats the air to the burning oxygen supply, and the gas of generation calls directly-heated type hot blast or flue gas together during this air that has been heated and burning.

If dry by the fire material with this directly-heated type hot blast, can save the energy, reduce the oven dry cost, the researcher once carried out the oven dry research of materials such as cereal with this hot blast, the result is applied, its main cause is because in the directly-heated type hot blast that stove produced of this structure, has and does not have in a large number the imflammable gas and the many solid fuel particles that have burnt.And a large amount of dust.This is that air enters Lu Tang through grate in the less space of the resistance of fuel below grate because burning needs oxygen and temperature simultaneously.The fuel that has contacted with oxygen just burns, and the big place of the resistance that does not have the space there is not air to pass through, the imflammable gas that these fuel evaporate is difficult to obtain oxygen, can not burn, after treating that these imflammable gas are crossed the Lu Tang high-temperature region, be exactly to contact, again because of there not being ignition temperature not burn with oxygen.In order to provide more oxygen to burn, strengthen the amount of air often to fuel.Just strengthen air quantity, air quantity is big.Wind speed in the stove hall has also strengthened, and when wind speed during greater than the flotation velocity of some particle, these particles will hike up with the wind, and the reason of many solid fuel particles and a large amount of dusts is arranged in Here it is the directly-heated type hot blast that this stove produced.

Because the directly-heated type hot blast that above-mentioned stove produced contains a large amount of imflammable gas; the solid fuel particle dust; not only can not be used for drying material; and pollute the environment; therefore be used to dry the hot blast of material at present; be with the directly-heated type hot blast that stove produced of said structure just flue gas carry out heat exchange, routine steam boiler makes it to become steam with the water in this flue gas heating heat exchanger exactly.Pass through metal fin again, with the Steam Heating air or with above-mentioned flue gas water back and sheet metal, by sheet metal and pipeline, add hot-air, this hot blast that gets by heat exchange is called indirect hot blast, with this hot-air seasoning material clean hygiene, but heat loss is big during heat exchange, therefore energy consumption is big, oven dry cost height, so the beer groove that some prices are low, bent vinasse, fecula, soy sauce slag, the dregs of a decoction also do not obtain utilizing so far, because if above-mentioned drying materials is made feed, its price is lower than the oven dry cost.

The utility model is at the problem that prior art exists, and designs a kind ofly to make fuel combustion more complete the directly-heated type hot-air stove that the thermal efficiency is higher.

Directly-heated type hot-air stove provided by the utility model is that Pneumatic conveyer is formed by body of heater, deduster, the metering of fuel space method.

The main body of equipment is a body of heater, and it is a cylinder barrel shaped perpendicular to ground, and stove is interior from being divided into furnace bottom, combustion chamber, dirt pocket, three operating rooms down; Being furnace bottom below the grate, above the grate, is the combustion chamber below the dirt pocket, has only a center that the larynx orifice plate of a macropore is arranged between combustion chamber and the dirt pocket; Whole body of heater has four air inlets, two gas outlets; The position of four air inlets is: a furnace bottom that is positioned at below the grate, below two tangential directions that are positioned at combustion chamber cylinder barrel shaped upper side, larynx orifice plate, and near the larynx orifice plate, one in these two is fuel inlet, and also having one is the tangential direction that is positioned at dirt pocket cylinder barrel shaped upside; The position of two gas outlets is, one at furnace roof, the top of dirt pocket just, and one is the downside in the cylinder barrel shaped of dirt pocket, this outlet is connected with the import of deduster.

Fuel is to carry with strength with volumetric method metering back, enters in the stove from the tangential direction of combustion chamber upside.

Grate is a round step that the center is low, and the slit of a garden annular is arranged between per two steps.

Be illustrated below in conjunction with accompanying drawing

Fig. 1 is the utility model directly-heated type hot-air stove structural representation.

Fig. 2 is the structural representation of the utility model grate

Fuel in the fuel hopper 4 is after the volumetric method metering, by fuel conveying fan 3 usefulness strengths fuel is transported to the air inlet 10 of combustion chamber 8, fuel enters combustion chamber 8 from the tangential direction of cylinder barrel shaped, rotates with suspended form, burning on one side is Yi Bian slowly reduce on the grate 6; By the wind of dedusting fan 2 through air inlet 9, enter in the stove and rotate along the furnace wall, the gas that evaporates in the fuel can fully be contacted with oxygen, thereby obtain completing combustion, and the when burning institute red-hot gas that produces is also rotated thereupon, 15 to dirt pocket 12 through the larynx hole, because larynx hole 15 is big to the velocity variations of dirt pocket 12, the cold wind rotation of the rotation that dust can sedimentation be come in side-inlet 13 tangential directions on the dirt pocket 12 then, 17 enter deduster 19 and are removed through the gas outlet, and hot blast enters the wind that hot-blast main 16 and deduster 19 are separated from furnace roof air outlet 14, the wind that reclaims heat from the stove passageway comes together in hot-blast main 16, enters drying system.

Be deposited in and go back the intact fixed carbon of unburned on the grate 6, blow into furnace bottom 7 below grate 6 by hair-dryer 1, annular gap 20 between garden shape step 21 enters combustion chamber 8, and airborne oxygen fully contacts with the fixed carbon that does not burn down, and makes fixed carbon obtain completing combustion.Dust after having burnt is discharged by ash exhauster 20.

Obtain implementing in the Jiangxi Province State Scientific and Technological Commission nineteen ninety key research project that the utility model is born by the inventor " research of wet rice bran complete drying equipment ", implement the place: Grain and Cooking Oil Processing Factory, Chongren County, Jiangxi Province.

The inventor has designed an XKHG250 type directly-heated type hot-air stove according to customer requirements.Use rice husk as fuel, the 120 kg husk that per hour burns, theoretical calorific value are 360,000 kilocalories, and in fact now per hour, 255 ℃ 6000 cubic metres of hot blasts can take place, about 3,312 ten thousand kilocalories of conversion calorific value, the rice bran of this hot-air seasoning of about 92% usefulness of the thermal efficiency wherein is fair and clear, ashless nontoxic.Because 250 ℃ of hot blast temperatures are than higher, the wet rice bran of oven dry moisture content 60% just can obtain the siccative of moisture content 8% 9 seconds, and a class just can produce 2 tons of siccatives.

The utility model has the advantage of:

Since fuel under the effect of wind-force, in the combustion chamber, rotate with suspended form, burning on one side, slowly be down on the grate on one side, be deposited in the complete fixed carbon of unburned on the grate, have again the airborne oxygen of below grate, coming in to help further burning, therefore fuel has the sufficient time to contact with airborne oxygen with chance, thereby can obtain than completing combustion, almost not have imflammable gas in the directly-heated type hot blast that produces, just smokeless.

2. only have one very little wind to enter in the stove below grate, the like this solid fuel particle above the grate and dust just can not be blown up, and offer the required oxygen of fuel combustion Air mainly is that the tangential direction from the upside of combustion chamber cylinder barrel shaped enters in the stove, rotate along the furnace wall, itself just has dustproof function the forms of motion of this wind, and the hot blast that contains a small amount of dust is again after the dedusting of larynx hole, dirt pocket, deduster, and is almost smokelessly ashless.

3. with the quality of directly-heated type hot-air seasoning material provided by the utility model, almost can compare with the quality of material of indirect hot-air seasoning, but can save Energy Intensity Reduction oven dry cost, the waste material oven dry that makes the low brewex's grains of those prices, vinasse, fecula, soy sauce residues, the dregs of a decoction etc. not obtain utilizing is made feed and is had an economic benefit greatly.

4. directly-heated type hot-air stove provided by the utility model, so smokeless is free from environmental pollution.

Claims (4)

1, a kind of directly-heated type hot-air stove is characterized in that being made up of body of heater, deduster, the metering of fuel space method, Pneumatic conveyer.

2, directly-heated type hot-air stove according to claim 1, it is characterized in that body of heater is a cylinder barrel shaped perpendicular to ground, in the stove below being divided into furnace bottom 7, combustion chamber 8, dirt pocket 12, three operating rooms, grate 6 down be furnace bottom 7, grate 6 above, dirt pocket 12 below be combustion chamber 8, a larynx orifice plate 11 is arranged between combustion chamber and the dirt pocket.There is a larynx hole 15 at the center of larynx orifice plate 11; Whole body of heater has four air inlets, two gas outlets, the position of four air inlets is: air inlet 5 is positioned at below the grate 6, air inlet 9, air inlet 10 are positioned at the tangential direction of combustion chamber 8 cylinder barrel shaped upper sides, below the larynx orifice plate 11, and near larynx orifice plate 11 places, one in these two is fuel inlet, and air inlet 13 is the tangential directions that are positioned at dirt pocket cylinder barrel shaped upside; The position of two gas outlets is: gas outlet 14 is at furnace roof, is exactly the top of dirt pocket 12, and gas outlet 17 is positioned at the downside of the cylinder barrel shaped of dirt pocket 12, and this gas outlet is connected with the air inlet of deduster 19.

3, according to claim 1 or 2 described directly-heated type hot-air stoves, it is characterized in that used fuel is with after the volumetric method metering, carry with strength, the air inlet 9 of 8 upsides or air inlet 10 enter in the stove from tangential direction from the combustion chamber.

4, directly-heated type hot-air stove according to claim 1 and 2 is characterized in that described grate 6 is the garden steps that the center is low, has the slit 20 of an annular between per two steps

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