CN2676124Y - Continuous rotary-drum furnace - Google Patents

Abstract

The utility model discloses a continuous rotary-drum furnace, mainly solving the problem that the un-ideal degree of mixing of baking material in the continuous rotary-drum furnace provided with a spiral baffle in prior art. The utility model adopts a shoveling plate additionally arranged in the furnace body of the continuous rotary-drum furnace which is provided with the spiral baffle. The scheme that the shoveling plate tightly abuts against the inner wall of the furnace body preferably solves the problem. The utility model can be used in baking process of a catalyst and a catalyst carrier.

Description

A kind of continuity revolution stove

Technical field

The utility model relates to a kind of continuity revolution stove, particularly about a kind of continuity revolution stove that is used for calcined catalyst or catalyst carrier.

Background technology

Roasting is the key operation in the catalyst preparation process.The roasting process of catalyst and catalyst carrier carries out in static equipment usually, as muffle furnace, tunnel cave etc.Because the swinging stove can play the effect of stirring, mixing to material, thereby catalyst and catalyst carrier being heated betwixt is more even; Because the waste gas that catalyst produces in roasting process will in time discharge, even in some special occasions, catalyst also requires to carry out roasting under certain atmosphere, roasting apparatus structurally needs better seal like this, because the phenomenon of the device interior temperature distributing disproportionation that air draft or air blast cause, the swinging stove is easier in this meets the demands to reduce.Therefore, the combination property that adopts swinging stove calcined catalyst and catalyst carrier to be obtained is better than roasting in static equipment.

Yet people lack the understanding of system for the mobility status of bulk cargo for a long time, and reason is the research system not of bulk cargo itself on the one hand, is to characterize the mobile ways and means of bulk cargo because still lack consistent test at present on the other hand.From the engineering application point of view, the main purpose that the research bulk cargo flows in continuity revolution stove is to obtain the mean residence time of bulk cargo in stove and the computational methods of time of staying variance (important indicator of reflection time of staying intensity); In the two, the latter is very important for the roasting process of catalyst and catalyst carrier, because the roasting time and the temperature of catalyst and catalyst carrier are emphasized " just right ", can cross then too lately especially, be to weigh the key index whether roasting apparatus is applicable to catalyst and catalyst carrier roasting so guarantee the intensity of the time of staying.

Chinese patent (application number: 03210256.9) solved the problem that residence time of material is concentrated inadequately preferably by the technical scheme of setting up helical baffle in stove inside.The mean residence time t of material in stove can be calculated by following formula,

$t=\frac{L}{\mathrm{nH}}$

Wherein, L---stove total length, rice

N---stove rotating speed, rev/min

H---helical baffle spiral shell square, rice

Therefore, from following formula as can be known, when material mean residence time t is longer, certainly will to increase stove length overall L, less rotation speed n or helical baffle spiral shell square H.And L and H are decided by the stove manufacture level usually, for the body of heater material is the stove of metal material, for avoiding the distortion of stove under the high-temperature roasting, usually L is unsuitable long, and H then should not be too little, to avoid making processing difficulties, so a kind of feasible scheme is to reduce the stove rotation speed n, stove is moving than under the slow-speed of revolution like this, will reduce the chance that material mixes mutually, has weakened the uniformity coefficient of roasting.

Summary of the invention

Technical problem to be solved in the utility model is the uneven problem of mixability that has the roasting material in the continuity revolution stove in the conventional art, and a kind of new continuity revolution stove is provided.These continuity rotary furnace kiln furnitures have can make the roasting material keep the even time of staying in the revolution stove, helps the characteristics that material mixes mutually simultaneously.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows: a kind of continuity revolution stove, comprise feed arrangement, the revolution body of heater, be arranged at helical baffle and drawing mechanism in the body of heater, feed arrangement, revolution body of heater and drawing mechanism that helical baffle is set are supported by furnace body support, Power Drive Unit also is housed on body of heater, space between the revolution body of heater inside spin baffle plate constitutes Flow of Goods and Materials and heated zone, at least 1 flight wherein is set between each spiral shell square of helical baffle, flight and inboard wall of furnace body and helical baffle fit tightly, and its vertical height is less than 1/4 of the helical baffle height.

In the technique scheme, flight and helical baffle are used in combination; The number preferable range of flight is suitably to increase according to stove internal diameter size; The flight preferred version for be parallel to the stove central axis or and the stove central axis at an angle; Another preferred version of flight is for being radiation arrangement or inclination and stove internal diameter direction at an angle along the stove internal diameter; The material of flight is metal material or refractory material.

In the utility model, owing to be provided with flight in body of heater inside, helped promoting the mutual mixing of material, improved the uniformity of roasting material, concentrate owing to the original helical baffle of stove has the residence time of material of assurance simultaneously, thereby obtained better technical effect.

Description of drawings

Fig. 1 is an external heating type continuity revolution stove structural representation of the present utility model.

Fig. 2 is the part sectioned view of the utility model Fig. 1

Fig. 3 makes the schematic diagram of radial motion in continuity revolution stove for the roasting material.

Among Fig. 1, Fig. 2 or Fig. 3: 1 is air exhausting device, and 2 is drawing mechanism, and 3 is rotary furnace kiln body, and 4 is spiral baffle, and 5 is flight, and 6 is heating jacket, and 7 is drive unit, and 8 is feed arrangement, and 9 is support.

As Fig. 1, under drive unit 7 drives, continuity rotary furnace kiln body 3 is done to slowly run, by feed arrangement 8 send into the catalyst of stove body of heater 3 and catalyst carrier particle self and and inboard wall of furnace body between the frictional force acting in conjunction under, taken to behind the certain altitude along the landing of bed of material laminar surface by body of heater.Height that material takes up and stove rotating speed have much relations, and when rotating speed was big, the height that material is taken up was just big, even when stove rotating speed enough greatly the time, and no longer landing but be attached to the stove inwall and make circular motion after material takes up around the axle center.And when rotating speed was very little, material was only done slight swing in the stove bottom, thereby was unfavorable for that so the mutual mixing of material influences the uniformity coefficient of material roasting.After adding flight, material is taken up to certain altitude by flight, falls again again, helps promoting the mutual mixing of material, improves the uniformity of roasting.But have only the independent effect of flight will cause the dispersion of residence time of material, make the time of material particles roasting differ, thereby have influence on whole roasting quality, and can guarantee the centrality of the time of staying by the effect of helical baffle, Chinese patent (application number: 03210256.9) for being used as of helical baffle more detailed argumentation.Therefore, the utility model is used in combination by helical baffle and flight, has obtained better technical effect.

Claims (6)

1, a kind of continuity revolution stove, comprise feed arrangement, turn round body of heater, be arranged at helical baffle and drawing mechanism in the body of heater, feed arrangement, revolution body of heater and drawing mechanism that helical baffle is set are supported by furnace body support, Power Drive Unit also is housed on body of heater, space between the revolution body of heater inside spin baffle plate constitutes Flow of Goods and Materials and heated zone, it is characterized in that being provided with between each spiral shell square of helical baffle at least 1 flight, flight and inboard wall of furnace body and helical baffle fit tightly, and its vertical height is less than 1/4 of the helical baffle height.

2, according to the described continuity revolution of claim 1 stove, it is characterized in that flight and helical baffle are used in combination.

3,, it is characterized in that the number of flight suitably increases according to stove internal diameter size according to the described continuity revolution of claim 1 stove.

4, according to the described continuity of claim 1 revolution stove, it is characterized in that flight be parallel to the stove central axis or and the stove central axis at an angle.

5, according to the described continuity revolution of claim 1 stove, it is characterized in that flight is radiation arrangement or inclination and stove internal diameter direction at an angle along the stove internal diameter.

6, according to the described continuity revolution of claim 1 stove, the material that it is characterized in that flight is metal material or refractory material.

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