阅读说明：本技术 无烟煤石灰竖窑及其改造工法 (Anthracite lime shaft kiln and transformation method thereof ) 是由 陈云 于 2020-12-17 设计创作，主要内容包括：本发明提供一种无烟煤石灰竖窑及其改造工法,包括从上至下分布在石灰竖窑内的预热带、煅烧带冷却带和卸料带,石灰竖窑底部圆周直径与高度比为4.5-5,预热带上端开设有进料口,进料口的下侧设置有过渡料仓,过渡料仓的出料口处设置有传输机构,传输机构下侧安装有布料机构,预热带底部铺设有透气隔板,煅烧带、冷却带和卸料带底部均铺设有防热隔板,防热隔板中间贯穿设置有导料机构,煅烧带进气口安装有风机,卸料带的底部铺设有一层炉篦,卸料带下方设置有刮板卸料机构,解决了以往的石灰竖窑结构不佳,导致石灰煅烧效果欠佳的问题,本发明结构合理,产出的石灰纯度高,受热均匀,热量利用率高。(The invention provides a anthracite lime shaft kiln and a transformation method thereof, which comprises a preheating zone, a calcining zone cooling zone and a discharging zone which are distributed in the lime shaft kiln from top to bottom, wherein the diameter-height ratio of the circumference of the bottom of the lime shaft kiln is 4.5-5, the upper end of the preheating zone is provided with a feed inlet, the lower side of the feed inlet is provided with a transition bin, the discharge outlet of the transition bin is provided with a transmission mechanism, the lower side of the transmission mechanism is provided with a material distribution mechanism, the bottom of the preheating zone is paved with a ventilating partition plate, the bottoms of the calcining zone, the cooling zone and the discharging zone are all paved with heat-proof partition plates, a material guide mechanism is arranged in the middle of each heat-proof partition plate in a penetrating manner, a fan is arranged at the air inlet of the calcining zone, a layer of grate is paved at the bottom of the discharging zone, and a scraper discharging mechanism is, the produced lime has high purity, uniform heating and high heat utilization rate.)

1. An anthracite lime shaft kiln is characterized in that: include from last preheating zone, calcining zone, cooling zone and the discharge strip of distributing down in lime shaft kiln, lime shaft kiln is hollow cylinder structure, the feed inlet has been seted up to the preheating zone upper end, the downside of feed inlet is provided with the transition feed bin, the discharge gate department of transition feed bin is provided with transmission device, cloth mechanism is installed to the transmission device downside, ventilative baffle has been laid to the preheating zone bottom, calcining zone, cooling zone and discharge strip bottom have all been laid and have been prevented the heat baffle, it is provided with guide mechanism to run through in the middle of preventing the heat baffle, the fan is installed to calcining zone air inlet, the bottom of discharge strip is provided with the grate, the discharge strip below is provided with scraper blade shedding mechanism.

2. The anthracite lime shaft kiln as set forth in claim 1, wherein: the transition bin discharge gate department installs speed limiting mechanism, speed limiting mechanism is a motor and connects the epaxial auger axle of motor power.

3. The anthracite lime shaft kiln as set forth in claim 1, wherein: the transmission mechanism is a conveyor belt for counterclockwise rotation.

4. The anthracite lime shaft kiln as set forth in claim 1, wherein: the distributing mechanism is a dense-phase filling device.

5. The anthracite lime shaft kiln as set forth in claim 1, wherein: the material guide mechanism comprises a material guide cylinder, a driving motor is arranged in the material guide cylinder, and a spiral shaft is connected to a power shaft of the driving motor.

6. The anthracite lime shaft kiln as set forth in claim 1, wherein: the scraper plate unloading mechanism comprises a main motor, and a plurality of scraper plates are connected to a power shaft of the main motor.

7. The anthracite lime shaft kiln as set forth in claim 6, wherein: the plurality of the scrapers are distributed in an annular shape, the distance between the outer walls of the scrapers and the inner wall of the discharging belt is 1-2mm, and the bottom of the discharging belt is provided with a discharging opening.

8. The anthracite lime shaft kiln as set forth in claim 1, wherein: the lime shaft kiln is characterized by further comprising a heat insulation layer arranged on the inner wall of the lime shaft kiln, wherein a kiln liner is laid on the inner wall side of the heat insulation layer, and the kiln liner is formed by laying refractory bricks.

9. The anthracite lime shaft kiln as set forth in claim 1, wherein: the no-load wind speed of the fan is 0.12-0.18 m/s, and the ratio of the diameter of the bottom circle of the lime shaft kiln to the height thereof is 4.5-5.

10. The kiln modification method of the anthracite lime shaft kiln as set forth in claims 1 to 10, which is characterized in that: the method comprises the following steps:

step one, reforming a kiln inner container: the refractory bricks at the feed inlet of the lime shaft kiln are downwards dismantled and rebuilt, if the refractory bricks at the cooling zone are not damaged, the refractory bricks can not be dismantled, and the diameter of the feed inlet is enlarged by 1.5 times;

step two, modifying a material distribution mechanism: the original material distributing mechanism of the lime shaft kiln is dismantled and replaced by a dense-phase loader;

step three, installing a transition bin additionally: a transition bin is installed at the feeding port of the original lime shaft kiln, a conveying belt is additionally installed at the discharging port of the transition bin, and the left side of the conveying belt can reach the feeding port of the dense phase loader in the step two;

step four, furnace grate and unloading reconstruction: and (3) dismantling the original unloader system and the grate under the lime shaft kiln, remanufacturing the grate, and installing a scraper plate unloading mechanism.

Technical Field

The invention relates to an anthracite lime shaft kiln and a transformation method thereof, belonging to the technical field of lime shaft kiln calcination.

Background

The limestone is burnt into lime through endothermic reaction, which is the result of satisfying various conditions in the decomposition process. Due to the difference of technical conditions, the quality of lime is also different, the honesty degree of a shaft kiln machine is higher, equipment is advanced, but the produced lime has high raw burning rate and over burning rate, high energy consumption and low activity, and has the bad phenomena of loose core, biased fire, nodulation and the like; the problems are mostly as follows: 1. the height-diameter ratio (the ratio of the height to the diameter) of the shaft kiln is not good; 2. the over-large taper of the upper section of the shaft kiln causes uneven heating of lime, insufficient side fire and high defective rate; 3. the heat distribution and the material distribution are not uniform; 4. the unloading is not uniform enough; the anthracite lime shaft kiln and a modification method thereof are urgently needed to solve the problems.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the anthracite lime shaft kiln and the transformation method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides an anthracite lime shaft kiln, includes from last preheating zone, calcining zone cooling zone and the discharge strip of distributing down in lime shaft kiln, lime shaft kiln bottom circumference diameter is 4.5-5 with the altitude ratio, the feed inlet has been seted up to the preheating zone upper end, the downside of feed inlet is provided with the transition feed bin, the discharge gate department of transition feed bin is provided with transmission device, cloth mechanism is installed to the transmission device downside, ventilative baffle has been laid to the preheating zone bottom, heat-proof baffle has all been laid to calcining zone, cooling zone and discharge strip bottom, it is provided with guide mechanism to run through in the middle of the heat-proof baffle, the fan is installed to the calcining zone air inlet, the one deck grate has been laid to the bottom of discharge strip, the discharge strip below is provided with scraper discharge mechanism.

Furthermore, a speed limiting mechanism is installed at the discharge port of the transition bin, and the speed limiting mechanism is composed of a motor and a packing auger shaft connected to a power shaft of the motor.

Further, the transmission mechanism is a conveyor belt for counterclockwise rotation.

Further, the material guiding mechanism comprises a material guiding barrel, a driving motor is installed inside the material guiding barrel, and a spiral shaft is connected to a power shaft of the driving motor.

Furthermore, the scraper discharging mechanism comprises a main motor, and a plurality of scrapers are connected to a power shaft of the main motor.

Furthermore, the scrapers are distributed annularly, the distance between the outer walls of the scrapers and the inner wall of the discharging belt is 1-2mm, and the bottom of the discharging belt is provided with a discharging opening.

The lime shaft kiln further comprises a heat insulation layer arranged on the inner wall of the lime shaft kiln, a kiln liner is laid on the side of the inner wall of the heat insulation layer, and the kiln liner is formed by laying refractory bricks.

Furthermore, the no-load wind speed of the fan is 0.12-0.18 m/s, and the ratio of the diameter of the bottom circle of the lime shaft kiln to the height thereof is 4.5-5.

The invention relates to a kiln transformation method of an anthracite lime shaft kiln, which comprises the following steps:

step one, reforming a kiln inner container: the refractory bricks at the feed inlet of the lime shaft kiln are downwards dismantled and rebuilt, if the refractory bricks at the cooling zone are not damaged, the refractory bricks can not be dismantled, and the diameter of the feed inlet is enlarged by 1.5 times;

step two, modifying a material distribution mechanism: the original material distributing mechanism of the lime shaft kiln is dismantled and replaced by a dense-phase loader;

step three, installing a transition bin additionally: a transition bin is installed at the feeding port of the original lime shaft kiln, a conveying belt is additionally installed at the discharging port of the transition bin, and the left side of the conveying belt can reach the feeding port of the dense phase loader in the step two;

step four, furnace grate and unloading reconstruction: demolishing original unloader system and grate under lime shaft kiln, remanufacturing grate, installing a scraper unloading mechanism

The invention has the beneficial effects that:

1. the ratio of the diameter to the height of the circumference at the bottom of the lime shaft kiln is 4.5-5, the ratio of the diameter to the height does not cause the preheating zone to move upwards and shorten, the heat loss is small, and the lime shaft kiln has stable quality because the ratio of the diameter to the height is large, the cooling zone is stable and is not easy to discharge fire materials;

2. the diameter of the improved feed inlet is enlarged by 1.5 times, and the taper of the upper section is reduced by enlarging the diameter of the feed inlet, so that the problem of insufficient peripheral heat is solved, and the yield is improved;

3. the material distribution mechanism is a dense-phase loader and can perform material distribution by spraying according to the Archimedes line, so that the material distribution is more uniform;

4. the scraper discharging mechanism comprises a main motor, wherein a power shaft of the main motor is connected with a plurality of scrapers, the scrapers form a cylindrical structure, and the diameter of the cylinder is the same as the inner diameter of a discharging belt, so that lime on the inner wall of a cooling belt is fully scraped.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of the anthracite lime shaft kiln of the present invention;

in the figure: lime shaft kiln 1, heat preservation 2, 3 kiln inner bags, 4 guide mechanisms, 5 feed inlets, 6 transition bins, 7 transmission mechanisms, 8 material distribution mechanisms, 9 breathable partition plates, 10 heat-proof partition plates, 11 grates, 12 scraper discharging mechanisms, 13 main motors, 14 discharge outlets and 15 fans.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Referring to fig. 1, the present invention provides a technical solution: an anthracite lime shaft kiln 1 comprises a preheating zone and a calcining zone which are distributed in the lime shaft kiln 1 from top to bottom, cooling zone and discharge area, lime shaft kiln 1 bottom circumference diameter and height ratio are 4.5-5, feed inlet 5 has been seted up to the preheating zone upper end, the downside of feed inlet 5 is provided with transition feed bin 6, the discharge gate department of transition feed bin 6 is provided with transport mechanism 7, cloth mechanism 8 is installed to transport mechanism 7 downside, ventilative baffle 9 has been laid to the preheating zone bottom, the calcining zone, cooling zone and discharge area bottom have all been laid heat-proof baffle 10, run through in the middle of the heat-proof baffle 10 and be provided with guide mechanism 4, fan 15 is installed to the calcining zone air inlet, one deck grate 11 has been laid to the bottom of discharge area, discharge area below is provided with scraper blade shedding mechanism 12, solved lime shaft kiln 1 structure not good in the past, lead to the lime calcination effect not good enough problem.

The specific working principle is as follows: the raw materials enter a transition bin 6 through a feeding hole 5 for temporary storage, a speed limiting mechanism is arranged at a discharging hole of the transition bin 6, the speed limiting mechanism is a motor and a packing auger shaft connected to a power shaft of the motor, and the feeding speed of the feeding hole 5 is controlled by controlling the input power of the motor; then the transition bin 6 guides the raw materials into a material distribution mechanism 8 through a lower conveying mechanism 7, the raw materials are uniformly distributed through the material distribution mechanism 8, and the raw materials uniformly fall into a combustion zone through a ventilating partition plate 9; in addition, high-temperature airflow in the combustion zone enters the preheating zone through the ventilating partition plate 9 to fully preheat the raw materials; the fan 15 is energized to blow air to the combustion zone and to initiate combustion. After being combusted by the combustion zone, the raw materials are conveyed to the cooling zone for sufficient cooling through the material guide mechanism 4 at the bottom; then the lime enters the discharging belt through the material guiding mechanism 4 below the cooling belt, is filtered through the grate 11, then the pure lime enters the scraper discharging mechanism 12 through the material guiding mechanism 4, and finally the lime is fully scraped out and is led out from the discharging opening 14.

The discharge port of the transition bin 6 is provided with a speed limiting mechanism which is a motor and a packing auger shaft connected to a power shaft of the motor and is used for controlling the feeding speed of the feed port 5.

The conveying mechanism 7 is a conveying belt rotating anticlockwise and used for conveying the materials in the transition bin 6 to the distributing mechanism 8.

The distributing mechanism 8 of the invention is a dense-phase loader, which is prior art and can refer to the publication number: CN21175482U, this cloth mechanism 8 can spray the cloth according to archimedes line for the cloth is more even.

The material guide mechanism 4 comprises a material guide cylinder, a driving motor is arranged in the material guide cylinder, and a spiral shaft is connected to a power shaft of the driving motor and used for uniformly guiding materials.

The scraper discharging mechanism 12 comprises a main motor 13, wherein a power shaft of the main motor 13 is connected with a plurality of scrapers, the scrapers form a cylindrical structure, and the diameter of the cylinder is the same as the inner diameter of a discharging belt, so that lime on the inner wall of a cooling belt is fully scraped.

The bottom of the discharging belt is provided with a discharging opening 14 for discharging calcined lime.

The invention also comprises a heat-insulating layer 2 arranged on the inner wall of the lime shaft kiln 1, a kiln liner 3 is laid on the inner wall side of the heat-insulating layer 2, the kiln liner 3 is formed by laying refractory bricks, the heat-insulating layer 2 has a good heat-insulating effect, the heat loss is slowed down, and the kiln liner 3 has a heat-insulating effect.

The no-load wind speed of the fan 15 is 0.12-0.18 m/s, and the speed is matched according to the required wind speed after the fan 15 is controlled by an external controller, so that the optimal air supply effect is achieved.

The invention relates to a kiln transformation method of an anthracite lime shaft kiln 1, which comprises the following steps:

step one, reforming a kiln inner container 3: the refractory bricks at the feed inlet 5 of the lime shaft kiln 1 are dismantled downwards and rebuilt, if the refractory bricks at the cooling zone are not damaged, the refractory bricks can not be dismantled, and the diameter of the feed inlet 5 is enlarged by 1.5 times;

step two, the transformation of the material distribution mechanism 8: the original distributing mechanism 8 of the lime shaft kiln 1 is dismantled and replaced by a dense-phase loader, which is the prior art and can refer to the publication number: CN21175482U, the material distribution mechanism 8 can spray material distribution according to Archimedes lines, so that the material distribution is more uniform;

step three, additionally installing a transition bin 6: a transition bin 6 is arranged at a feeding hole 5 of the original lime shaft kiln 1, a conveying belt is additionally arranged at a discharging hole of the transition bin 6, and the left side of the conveying belt can reach the feeding hole 5 of the dense phase filling device in the step two;

step four, the furnace grate 11 and the unloading reconstruction: the original unloader system and the grate 11 under the lime shaft kiln 1 are removed, the grate 11 is manufactured again, and a scraper unloading mechanism 12 is installed.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.