CN2552923Y

CN2552923Y - Energy-saving vertical limekiln

Info

Publication number: CN2552923Y
Application number: CN02237668U
Authority: CN
Inventors: 周大伟; 刘启胜; 包正良; 尹保明
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-24
Filing date: 2002-06-24
Publication date: 2003-05-28
Anticipated expiration: 2012-06-24

Abstract

The utility model relates to an energy-saving lime shaft kiln, comprising an outer body, an inner hull, a feeder, an unloading grey device, a grate, a ring-shaped flue and a blower, which is characterized in that: the inner hull is arranged in the outer body; the feeder is arranged at the upper end of the inner hull; the grate is arranged at the lower end of the inner hull; the unloading grey device is arranged under the grate; the ring-shaped flue is arranged around the upper port of the inner hull; the inner side of the flue is communicated with the inner part of the inner hull; the ring-shaped flue is connected with the chimney; the blower is arranged under the grate; the inner hull is vase-shape; wherein the upper part is normal-section circular arc curve conical and the lower part is normal-section inverted circular arc curve conical. The utility model has the advantages that: the shape of the inner hull is favor of preheating, calcining and cooling of the material in the inner hull; the circular air duct and the blower form into an upper-pumping and lower-feeding ventilating mechanism; the mechanism is favor of the heat exchange to the air and the fully combustion of the fuel in the downward movement of the material; the product quality and yield are increased and the energy consumption is decreased; the umbrella-shape grate enlarged the draught area and improved the heat efficiency; the multilayer outer body structure greatly increased the heat insulation and reduced the energy consumption further.

Description

Energy-saving lime vertical kiln

Technical field

The utility model relates to the kiln of producing lime, particularly a kind of energy-saving lime vertical kiln.

Background technology

China lime enterprise mostly is earth kiln, general shaft kiln at present, and various places kiln type difference mainly contains shuttle type, club-type, altar type, pyramid type etc.The virtual height of the kiln of shuttle type, altar type is not enough, the kiln of particularly short altar type, and their volume is bigger, and because of being the naked light operation, heat loses in a large number from kilneye, though diameter is very big, it is not enough to ventilate.The virtual height of club-type and pyramid type kiln and maximum diameter bigger, may cause blast not enough, simultaneously because maximum diameter and last kilneye diameter ratio are too little, make kiln building stones rolling changing conditions bad, material is long and inhomogeneous at kiln residence time, influences quality product and production efficiency.

Earth kiln, general shaft kiln adopt natural ventilation, are plain grate at the bottom of the kiln, and the furnace air underfed is difficult to realize the perfect combustion of fuel in the kiln, and the kiln temperature drop is low, so lime quality is poor.Yield poorly, the energy consumption height.Its kiln wall heat-proof quality is bad in addition, rapid heat dissipation, expended energy.

Summary of the invention

The energy-saving lime vertical kiln that the purpose of this utility model just provides and a kind ofly can improve product quality and yield, energy consumption is low.

The technical solution of the utility model is: comprise ectosome, inner bag, feeder, ash-discharging device, fire grate, inner bag is positioned at ectosome, feeder is positioned at the inner bag upper end, fire grate is positioned at the inner bag lower end, ash-discharging device is positioned at the fire grate below, also comprise being positioned at inner bag annular flue on every side suitable for reading, its inboard communicates with inner bag inside, and this annular flue is communicated with chimney; Also comprise the fan that is positioned at the fire grate below; 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 fire grate is a umbrella shape.

Described inner bag comprises flame retardant coating, air heat-insulation layer, skin, and flame retardant coating is positioned at the inboard, is air heat-insulation layer between skin and the flame retardant coating; Described ectosome comprises bed course, enclosure wall, thermofin, the load larrying member wall that is arranged in order outside the inner bag lateral.

The flame retardant coating of described inner bag is made of refractory brick, and skin is a brick laying structure; The bed course of described ectosome is a slag, and enclosure wall and load larrying member wall are brick laying structure, and thermofin is made of perlite.

Inner bag shape of the present utility model helps material preheating, calcining and cooling therein, its annular passage and 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, improve quality product and output, reduced energy consumption.The fire grate of umbrella shape has enlarged draught area, has improved hot effect.The outer body structure of multiwalled has improved thermal insulation greatly, further reduces energy expenditure.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

Referring to Fig. 1, the utility model comprises ectosome, inner bag, feeder 6, ash-discharging device 7, fire grate 1, and inner bag is positioned at ectosome, and feeder 6 is positioned at the inner bag upper end, and 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 fire grate 1, be provided with fan 2.Described inner bag be vase-shaped, its top is the circular curve taper of abscissusing, 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.Described ectosome comprises slag bed course 11, common brick enclosure wall 12, perlite thermofin 13, the common brick load larrying member wall 14 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 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.

Preheating zone 15 circular curve tapers 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 the material volume expansible characteristic of sinking to being heated, and adapted to gas again and rose along with temperature descends and the situation of volume-diminished takes place, and made up and down that gas velocity reaches unanimity, and material can obtain the ideal pre-heat effect.The transverse section of calcining zone 16 also is to increase gradually from top to bottom, gas velocity is along with the transverse section constantly increases and corresponding reduction, prolonged the residence time 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 tap density of material, strengthened the space of storeroom, reduced ventilation resistance, ventilation effect obtains very big improvement, helps the abundant burning of fuel and the utilization of heat energy, has quickened the calcining of Wingdale, improve output and quality, reduced coal consumption.Cooling zone is the taper of rounding arc curve, section dwindles from top to bottom, gas velocity is reduced from bottom to top, lime increased from bottom to top in this band residence time, 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 consumption.

General shaft kiln generally adopts natural 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 weather effect, often the draft deficiency, air flow quantity 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.

The utility model adopts aerofoil 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 natural ventilation air output deficiency and the influence that is subjected to Changes in weather.The kiln body has seven layers of composition, makes the stopping property and the better heat preservation of kiln, has reduced the loss and the diffusion of heat energy, is that energy-saving shaft kiln improves the stable yield quality, improves effect, reduces the important measures of coal consumption.

Claims

1, a kind of energy-saving lime vertical kiln, comprise ectosome, inner bag, feeder, ash-discharging device, fire grate, inner bag is positioned at ectosome, feeder is positioned at the inner bag upper end, fire grate is positioned at the inner bag lower end, and ash-discharging device is positioned at the fire grate below, it is characterized in that: also comprise being positioned at inner bag annular flue on every side suitable for reading, its inboard communicates with inner bag inside, and this annular flue is communicated with chimney; Also comprise the fan that is positioned at the fire grate below; 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.

2, energy-saving lime vertical kiln according to claim 1 is characterized in that: described fire grate is a umbrella shape.

3, energy-saving lime vertical kiln according to claim 1 and 2, it is characterized in that: described inner bag comprises flame retardant coating, air heat-insulation layer, skin, and flame retardant coating is positioned at the inboard, is air heat-insulation layer between skin and the flame retardant coating; Described ectosome comprises bed course, enclosure wall, thermofin, the load larrying member wall that is arranged in order outside the inner bag lateral.

4, energy-saving lime vertical kiln according to claim 3, it is characterized in that: the flame retardant coating of described inner bag is made of refractory brick, and skin is a brick laying structure; The bed course of described ectosome is a slag, and enclosure wall and load larrying member wall are brick laying structure, and thermofin is made of perlite.