CN201402036Y

CN201402036Y - Zhong shi lime shaft kiln

Info

Publication number: CN201402036Y
Application number: CN2009200390473U
Authority: CN
Inventors: 尹保明; 周大伟; 刘启胜; 包正良
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-06
Filing date: 2009-05-06
Publication date: 2010-02-10
Anticipated expiration: 2019-05-06

Abstract

The utility model relates to a zhong shi lime shaft kiln, which mainly comprises a furnace outer body, an liner, a chimney, a feeder, an ash discharging device, a composite fire grate; the liner is located in the furnace outer body, the feeder is located at the upper end of the liner, the composite fire grate is located at the lower end of the liner, the ash discharging device is located under thecomposite fire grate; a ring-shaped flue is arranged around the upper port of the liner, and the inner side of the ring-shaped flue is communicated with the inside of the liner, the ring-shaped flueis communicated with a flue gas dust wind pipe (chimney), a blower is arranged under the composite fire grate. The shape of the liner for the zhong shi lime shaft kiln facilitates the preheating, calcining and cooling of the materials. The ring-shaped flue and the blower form a ventilation mechanism of 'upper-drawing and lower-blowing', which facilitates the heat exchange between the materials during the course of moving downward and the gas and the full combustion of the fuel, and increases the quality and output of the products, and reduces the energy consumption. The umbrella-shaped fire grate enlarges the ventilation area, and increases the thermal efficiency. The multilayer outer body structure greatly increases the thermal insulation, and can further reduce the energy consumption.

Description

Middle stone lime vertical kiln

Technical field

The utility model relates to a kind of middle stone lime vertical kiln, specifically produces the roasting apparatus of lime, belongs to building material industry lime production equipment technical field.

Background technology

The kiln type of domestic medium-sized and small enterprises lime production mostly is earth kiln, ordinary shaft kiln etc.This class kiln generally adopts gravity-flow ventilation, rely on the negative pressure draft of kiln tube itself, again because of adopting flat fire grate at the bottom of the kiln, incoming air area is little, adds climatic effect, often the draft deficiency, air mass flow is not enough, cause non-complete combustion of fuel, the kiln temperature drop is low, produce lime quality poor, yield poorly, problem that energy consumption is high.Country has expressly provided and has been eliminated.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned weak point, thus a kind of mechanization degree height is provided, can improves product, quality, mechanical forced ventilation, oxygen supply fully, energy consumption reduces, work situation improvement and small investment, good in economic efficiency middle stone lime vertical kiln.

The technical scheme that provides according to the utility model, in the stone lime vertical kiln comprise that body of heater is outer, inner bag, chimney, feeder, ash-discharging device, compound fire grate, it is outer that inner bag is positioned at body of heater, feeder is positioned at the inner bag upper end, and compound fire grate is positioned at the inner bag lower end, and ash-discharging device is positioned at the below of compound fire grate, be positioned at inner bag and be provided with annular flue around suitable for reading, its inboard communicates with inner bag inside, and this annular flue is communicated with flue gas ash removal airduct (chimney), is provided with pressure fan below compound fire grate.

Described inner bag is shaped as vase-shaped, and its top is the circular curve taper of abscissusing, and the bottom is the rounding arc curve taper of abscissusing.Described compound fire grate is a umbrella shape.

Described inner bag comprises flame retardant coating, air heat-insulation layer, common brick skin, and flame retardant coating is positioned at the inboard, is air heat-insulation layer between common brick skin and the flame retardant coating.

Described ectosome comprises slag bed course, common brick enclosure wall, perlite thermal insulation layer, the common brick load-carrying members wall that is arranged in order outside the inner bag lateral.

The flame retardant coating of described inner bag is made of refractory brick.Inner bag can be divided into three zones, the i.e. cooling zone of the calcining zone at the preheating zone on top, middle part, bottom from top to bottom.Preheating zone circular curve taper enlarges from top to bottom gradually.

Described flue internal layer is made of refractory brick, and the centre is a thermal insulation layer, and skin is a brick laying structure; The bed course of described ectosome is a slag, and enclosure wall and load-carrying members are concrete constructional column and brick wall structure.

Compared with the prior art the utility model has the following advantages:

The utility model is simple, compact and reasonable for structure; The inner bag shape helps material preheating, calcining and cooling therein.Its annular flue and pressure fan form the venting mechanism of " on take out down send ", help material in moving downward with the heat exchange of gas and the abundant burning of fuel, improved product quality and output, reduced energy consumption.The fire grate of umbrella shape has enlarged draught area, has improved hot effect.The outer body structure of multilayer has improved thermal insulation greatly, has further reduced energy consumption.

Description of drawings

Fig. 1 is the utility model structural representation.

The specific embodiment

Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:

As shown in Figure 1, the cooling zone 17, inner bag, furnace outer body etc. that comprise calcining zone 16, the bottom at compound fire grate 1, pressure fan 2, annular flue 3, the preheating zone 15 of protecting kiln circle 4, flue gas ash removal airduct (chimney) 5, feeder 6, ash-discharging device 7, flame retardant coating 8, air heat-insulation layer 9, common brick skin 10, slag bed course 11, common brick enclosure wall 12, perlite thermal insulation layer 13, common brick load-carrying members wall 14, top, middle part.

The utility model inner bag is positioned at furnace outer body, and feeder 6 is positioned at the inner bag upper end, and feeder 6 belows are provided with protects kiln circle 4, and compound fire grate 1 is a umbrella shape, is positioned at the inner bag lower end, and ash-discharging device 7 is positioned at the below of fire grate 1.Also comprise being positioned at inner bag annular flue 3 on every side suitable for reading, its inboard communicates with inner bag inside, and this annular flue 3 is communicated with chimney 5.Below compound fire grate 1, be provided with pressure fan 2.Described inner bag is vase-shaped, and its top is the circular curve taper of abscissusing, and the bottom is the rounding arc curve taper of abscissusing.

Described inner bag comprises flame retardant coating 8, air heat-insulation layer 9, common brick skin 10, and flame retardant coating 8 is positioned at the inboard, is air heat-insulation layer 9 between common brick outer 10 and the flame retardant coating 8.The flame retardant coating of described inner bag is made of refractory brick.Described ectosome comprises slag bed course 11, common brick enclosure wall 12, perlite thermal insulation layer 13, the common brick load-carrying members wall 14 that is arranged in order outside the inner bag lateral.

Inner bag of the present utility model can be divided into three zones from top to bottom, i.e. the cooling zone 17 of the calcining zone 16 at the preheating zone 15 on top, middle part, bottom.

The 15 circular curve tapers of described preheating zone enlarge from top to bottom gradually, impel material in dropping process, to make outside tumbling motion, both having helped material evenly descends, area of section is constantly increased, the heat exchange that helps between gas and the material is carried out, give full play to the warm of air-flow, reduced the loss of heat building stones.The vary in diameter of preheating zone had both adapted to material sink to the being heated characteristic of volumetric expansion, adapted to gas again and rose along with temperature descends and the situation of volume-diminished takes place, and made up and down that air velocity reaches unanimity, and material can obtain desirable pre-heat effect.The cross section of calcining zone also is to increase gradually from top to bottom, air velocity is along with the cross section constantly increases and corresponding reduction, prolonged the time of staying of air-flow, improved total heat transfer coefficient, helped fully carrying out of gas and storeroom heat exchanging process at calcining zone.The calcining zone section enlarges downwards gradually, reduced the bulk density of material, strengthened the space of storeroom, reduced flowing resistance, ventilation effect obtains very big improvement, helps the abundant burning of fuel and the utilization of heat energy, has quickened the calcining of lime stone, improve output and quality, reduced coal consumption.Salband is the taper of rounding arc curve, section dwindles from top to bottom, air velocity is reduced from bottom to top, lime increased from top to bottom in this band time of staying, help lime and air and carry out heat exchange, make the lime cooling fully, reduced the ash discharge temperature, reduce heat-energy losses, reduced energy resource consumption.

The utility model adopts centrifugal fan to carry out forced ventilation, and leveling off fire grate is the umbrella shape fire grate, has strengthened the bottom air inlet open area; Establish annular flue around the kilneye of top, rely on the chimney height difference to produce the negative pressure smoke evacuation, make to be the micro-pressure operation operation in the kiln, increased the furnace air circulation, strengthen burning, accelerated kiln sodalime stone decomposition rate, overcome gravity-flow ventilation intake deficiency and the influence that is subjected to Changes in weather.The kiln body has seven layers of composition, makes the sealing and the better heat preservation of kiln, has reduced the loss and the diffusion of heat energy, is that middle stone lime vertical kiln improves output, and stabilised quality improves effect, reduces the important measures of coal consumption.

Claims

1, a kind of middle stone lime vertical kiln, comprise furnace outer body, inner bag, chimney (5), feeder (6), ash-discharging device (7), compound fire grate (1), it is characterized in that: inner bag is positioned at furnace outer body, feeder (6) is positioned at the inner bag upper end, compound fire grate (1) is positioned at the inner bag lower end, ash-discharging device (7) is positioned at the below of compound fire grate (1), be positioned at the inner bag annular flue (3) that is provided with suitable for reading on every side, its inboard communicates with inner bag inside, this annular flue (3) is communicated with flue gas ash removal airduct (5), is provided with pressure fan (2) in the below of compound fire grate (1).

2, middle stone lime vertical kiln according to claim 1 is characterized in that described compound fire grate (1) is umbrella shape.

3, middle stone lime vertical kiln according to claim 1, it is vase-shaped to it is characterized in that described inner bag is shaped as, and its top is the circular curve taper of abscissusing, and the bottom is the rounding arc curve taper of abscissusing.

4, middle stone lime vertical kiln according to claim 1, it is characterized in that described inner bag comprises flame retardant coating (8), air heat-insulation layer (9), common brick skin (10), flame retardant coating (8) is positioned at the inboard, is air heat-insulation layer (9) between common brick skin (10) and the flame retardant coating (8).

5, middle stone lime vertical kiln according to claim 1 is characterized in that described ectosome comprises slag bed course (11), common brick enclosure wall (12), perlite thermal insulation layer (13), the common brick load-carrying members wall (14) that is arranged in order outside the inner bag lateral.

6, middle stone lime vertical kiln according to claim 4 is characterized in that the flame retardant coating (8) of described inner bag is made of refractory brick.

7, middle stone lime vertical kiln according to claim 1 is characterized in that described inner bag can be divided into three zones from top to bottom, i.e. the cooling zone (17) of the calcining zone (16) at the preheating zone on top (15), middle part, bottom.

8, middle stone lime vertical kiln according to claim 7 is characterized in that described preheating zone (15) circular curve taper enlarges gradually from top to bottom.