CN201532097U - Curved chamber kiln - Google Patents

Abstract

The utility model relates to a curved chamber kiln, in particular to a curved chamber kiln for calcine lump ore such as limestone, dolomite and the like. The curved chamber kiln comprises two kiln cylinders, wherein each kiln cylinder is provided with a feed device, a fuel spray gun, a kiln casing, a masonry layer and a discharge device from the top down, and the two kiln cylinders are connected through a flue channel. The curved chamber kiln is characterized in that the cross section of the masonry layer is of flat circular shape, the upper inner side of the flue channel in the middle of the kiln cylinder is respectively provided with an outward wind-guiding slope, the lower outer side of the flue channel in the middle of the kiln cylinder is respectively provided with an inward wind-baffle slope, and the kiln cylinder between the wind-guiding slope and the wind-baffle slope narrows down from left to right. The curved chamber kiln is provided with a narrow cavity, has excellent calcining quality, and is easy to operate.

Description

A kind of bent thorax kiln

Technical field

The utility model relates to a kind of bent thorax kiln, particularly is used for the bent thorax shaft furnace of massive ores such as calcined limestone, dolomite.

Background technology

At present, the existing bent thorax kiln of producing products such as lime, dolomite has two kiln bodies, and two kiln bodies are calcining and preheating ore by turns alternately, has interface channel to communicate with each other between two kiln bodies, regularly commutates once with the duty of conversion kiln body.In when operation, two kiln bodies ore of packing into from the top, fuel is sent into by the top of two kiln bodies respectively, by many spray guns that are embedded in the preheating zone fuel is evenly distributed on the section of whole kiln, and fuel is burnt uniformly.The fuel that bent thorax kiln uses also is fluid fuel, all can as combustion gas, fuel oil, coal dust etc.

Because two kiln thoraxes need rely on interface channel circulation flue gas, need to change at the flow direction of passage place flue gas.Showing as flue gas turns.The bent thorax shaft furnace of traditional structure, kiln thorax spatial axis is parallel, and is not curved two.Near a side at passage place, because distance is near, material bed thin, resistance is less, in flue gas turning process, and very smooth admission passage.Away from a side of passage, owing to distance, material bed thickness, resistance is bigger.In flue gas turning process, be difficult to admission passage, cause circulation not smooth, wind is walked a side, forms partially to burn.

Bent thorax kiln is built the cross section by laying bricks or stones and is generally circle, rectangle, semicircle, annular.Be generally axial symmetry or straight barrel structure, the cross sectional shape basically identical of above-below direction.Its common feature is: the axis in kiln thorax space straight perpendicular to ground, do not have bending; Can not effectively guide flue gas evenly to turn.Bias current problem in the time of can't fundamentally solving the flue gas turning.And interface channel is longer, and the easy sedimentation of the dust in the flue gas causes the collection ash, causes passage narrow, increases flue gas resistance, even blocking channel.

On the other hand, rectangle, semicircle, ring section cause the calcining section all to have obvious wedge angle: the sharp corner gas permeability is significantly better than other positions, and bigger with the gas permeability difference of core, local temperature is higher.During Flow of Goods and Materials, because the influence of Xie Liao Cone angle and kiln wall resistance; The ore decrease speed of sharp corner is starkly lower than the decrease speed at other positions.Aggravated localized hyperthermia.Dross, the frequent scaling loss of spray gun even scaffold accident in the kiln often appear.And sharp corner stress is concentrated relatively more serious, and housing is stressed unreasonable; Need more steel plate could satisfy requirement of strength.

Summary of the invention

In order to overcome the shortcoming of prior art, the utility model provides a kind of bent thorax kiln, and its housing width is little, and burning quality is good, easily holds operation.

The technical scheme in the invention for solving the technical problem is: it comprises two kiln tubes, each kiln tube all has feed arrangement, Fuel lance, kiln shell from top to bottom, builds layer and drawing mechanism by laying bricks or stones, two kiln tubes connect by exhaust gases passes, it is characterized in that: layer cross section of building by laying bricks or stones of described each kiln tube is oblateness; The inboard, top of the exhaust gases passes at described kiln tube middle part has outside wind-guiding slope respectively, and the outside, below of the exhaust gases passes at kiln tube middle part has inside Tuo Fengpo respectively; Described wind-guiding is sloping and drag the kiln tube between the wind slope to narrow down at left and right directions.

The utlity model has following advantage: 1, oblate cross section can effectively reduce circular on diametric(al) width, make core to the distance at edge less than circular and semicircle, improve the core gas permeability; 2, the wedge angle of calcining section is effectively eliminated in oblate cross section, avoids dross in the kiln, spray gun scaling loss situation to take place; 3, kiln thorax core is goed deep on outside wind-guiding slope, exhaust gases passes turning, makes the exhaust gases passes of its underpart directly go deep into the cross section core, significantly improves the core gas permeability; 4, the outside wind-guiding aspect kiln thorax core in exhaust gases passes turning is given prominence to, and particle is fully rolled, and calcines more even.Simultaneously, in the process that particle rolls, the size particles quadratic distribution make bulky grain flow to a side of gas permeability difference, and the good permeability of the bulky grain bed of material is in the granule bed of material, from having improved the gas permeability in the outside on the one hand again.Less grain flow reduces inboard local gas permeability to a gas permeability side preferably.Thereby reach the effect of balance air-flow uniformity coefficient; 5, under the prerequisite that guarantees gas permeability, increase substantially sectional area, output is largely increased.Bring up to more than 1000 tons from producing 800 tons daily.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model schematic front view;

Fig. 2 is the utility model signal left view;

Fig. 3 is the A-A cutaway view among the utility model Fig. 1;

Fig. 4 is the B-B cutaway view among the utility model Fig. 1;

Fig. 5 is the C-C cutaway view among the utility model Fig. 1;

Fig. 6 is the D-D cutaway view among the utility model Fig. 1.

The specific embodiment

As shown in drawings, the utility model comprises two kiln tubes 1,2, and each kiln tube 1,2 all has feed arrangement 3, Fuel lance 4, kiln shell 5 from top to bottom, build layer 6 by laying bricks or stones and 7, two kiln tubes of drawing mechanism 1,2 connect by exhaust gases passes 8.Layer 6 cross section of building by laying bricks or stones of described each kiln tube 1,2 are oblateness.The inboard, top of the exhaust gases passes 8 at described kiln tube 1,2 middle parts has outside wind-guiding slope 9 respectively, and the outside, the below of the exhaust gases passes 8 at kiln tube 1,2 middle parts has the inside wind slope 10 of dragging respectively, also can only establish wind-guiding slope 9, does not establish and drags wind slope 10.Described wind-guiding slope 9 and drag the kiln tube 1,2 between the wind slope 10 to narrow down at left and right directions.Hot blast deflection in the kiln tube 1,2 is quickened, mixed, smoothly by exhaust gases passes 8.

Described exhaust gases passes 8 is formed by 3-5.

The kiln thorax of described two kiln tubes 1,2 is a Long Circle at the cross section of drawing mechanism 7 parts.

Kiln shell 5 cross sections of described each kiln tube 1,2 are oblate.

Two kiln thorax axis 11 shown in Figure 1 are the curved shape of symmetry.

Claims (6)

1. bent thorax kiln, it comprises two kiln tubes (1,2), each kiln tube (1,2) all has feed arrangement (3), Fuel lance (4), kiln shell (5) from top to bottom, builds layer (6) and drawing mechanism (7) by laying bricks or stones, two kiln tubes (1,2) connect by exhaust gases passes (8), it is characterized in that: layer (6) cross section of building by laying bricks or stones of described each kiln tube (1,2) is oblateness; The inboard, top of the exhaust gases passes (8) at described kiln tube (1,2) middle part has outside wind-guiding slope (9) respectively, and the outside, below of the exhaust gases passes (8) at kiln tube (1,2) middle part has inside Tuo Fengpo (10) respectively; Described wind-guiding slope (9) and drag the kiln tube (1,2) between the wind slope (10) to narrow down at left and right directions.

2. bent thorax kiln according to claim 1 is characterized in that: described exhaust gases passes (8) is formed by 3-5.

3. bent thorax kiln according to claim 1 is characterized in that: the kiln thorax of described two kiln tubes (1,2) is a Long Circle at the cross section of drawing mechanism (7) part.

4. bent thorax kiln according to claim 1 is characterized in that: kiln shell (5) cross section of described each kiln tube (1,2) is for oblate.

5. bent thorax kiln according to claim 1 is characterized in that: the inboard, top of the exhaust gases passes (8) at described kiln tube (1,2) middle part has only outside wind-guiding slope (9) respectively.

6. bent thorax kiln according to claim 1 is characterized in that: described two kiln thorax axis (11) are the curved shape of symmetry.

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