CN103435276B - Production apparatus of active lime - Google Patents
Production apparatus of active lime Download PDFInfo
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- CN103435276B CN103435276B CN201310318687.9A CN201310318687A CN103435276B CN 103435276 B CN103435276 B CN 103435276B CN 201310318687 A CN201310318687 A CN 201310318687A CN 103435276 B CN103435276 B CN 103435276B
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Abstract
The invention discloses a production apparatus of active lime, and belongs to the field of active lime calcining technologies. The production apparatus comprises a feeing device, a calcining device, and a separating and waste heat utilization device, wherein a fluid-bed furnace is used as the calcining device. The production apparatus is capable of saving resources, increasing resource utilization rate, and avoiding waste of limestone mine tailing, and can be directly used for calcining limestone with granularity less than 10mm. The production apparatus is characterized in that: processes are simple, cost is low, product quality is high, investment is less, operation and maintenance are simple, energy is saved, the production apparatus is friendly to the environment and is clean, and fuel is widely available.
Description
Technical field
The present invention relates to active lime calcining technology field.
Background technology
Along with China's expanding economy, metallurgy, chemical industry, the building material industry demand to active lime increases day by day.The process units of active lime calcination mainly contains several kiln types such as single thorax shaft furnace, Maers Kiln, Fu Kasi kiln, rotary kiln, suspension kiln.But no matter which kind of kiln type, only have the lime stone of granularity > 10mm just can be effectively utilized, and the lime stone of granularity < 10mm must be crushed to below 1mm, and suspension kiln could be used to calcine.Meanwhile, the mine tailing wastage of limestone mine is surprising, preresearch estimates, and every annual amount at least reaches more than ten-million-ton scale.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of active lime production plant, this process units is specifically designed to the lime stone of calcining granularity < 10mm, solve the problem of limestone mine mine tailing waste, operation is simple, with low cost, Functionality, quality and appealing design, economize on resources, and improves resource utilization.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of active lime production plant, comprises feeding device, calciner plant, separation and residual heat using device, and calciner plant is fluidized furnace.
The preferred structure of fluidized furnace comprises body of heater, bottom of furnace body is provided with furnace bottom bellows, and in body of heater, furnace bottom bellows top is provided with distribution plate, and distribution plate upper furnace body lower disposed has two row's burners, between two row's burners, body of heater is provided with fluidized furnace charge pipe, and body of heater top sidewall is provided with fluidized furnace discharging opening; Body of heater is rectangle or circle.
Preferably, arrangement of burner is the double layout in relative both sides or annular double layout; The double layout in relative both sides, body of heater is the fluidized furnace of rectangle, and relative both sides are arranged in parallel burner, and two rows are arranged in every side, the upper and lower interlaced arrangement in position of upper row's burner and lower row's burner, and the burner position of relative both sides is staggered front to back layout; Annular is double to be arranged as around body of heater, and be circular layout two rows burner, the upper and lower interlaced arrangement in position of upper row's burner and lower row's burner.
Burner fuel is gaseous fuel, liquid fuel or solid fuel.
Preferably, burner fuel is gaseous fuel.
Feeding device comprises bucket elevator, raw material cabin and chute, is provided with raw material cabin, is provided with star-shaped ash unloading valve below raw material cabin, be provided with chute below star-shaped ash unloading valve below bucket elevator discharging opening, and trough outlet communicates with fluidized furnace charge pipe;
Separation and residual heat using device comprise the first cyclone dust collectors, second cyclone dust collectors, sack cleaner, cooling chamber, cooling blower, booster fan, heat exchanger, primary air fan, preheating First air pipeline, first finished bin, second finished bin, air-introduced machine and chimney, described first cyclone dust collectors charging aperture communicates with fluidized furnace discharging opening, below first cyclone dust collectors, discharging opening communicates with cooling chamber charging aperture, cooling chamber air inlet communicates with cooling blower air outlet, cooling chamber discharging opening communicates with the second cyclone dust collectors charging aperture, below second cyclone dust collectors, discharging opening communicates with the first finished bin, above second cyclone dust collectors, air outlet communicates with booster fan air inlet, and booster fan air outlet communicates with fluidized furnace furnace bottom bellows, above first cyclone dust collectors, high-temperature flue gas outlet communicates with heat exchanger air inlet, and heat exchanger gas outlet communicates with sack cleaner charging aperture, and the below discharging opening of heat exchanger and sack cleaner is communicated by pipeline, and pipe outlet communicates with the second finished bin, heat exchanger air inlet communicates with primary air fan air outlet, and heat exchanger air outlet is communicated with chute and burner respectively by preheating First air pipeline, sack cleaner gas outlet communicates with air-introduced machine import, and air-introduced machine outlet is communicated with chimney by smoke discharging pipe.
Fluidized furnace, the first cyclone dust collectors, the second cyclone dust collectors, sack cleaner, preheating First air pipeline, chute and cooling chamber outside are provided with insulation material; Fluidized furnace, the first cyclone dust collectors and cooling chamber inside are provided with exotic material.
The principle of this process units is: pre-heat primary air is blown into from fluidized furnace furnace bottom bellows, the fuel combustion sprayed into burner, calcine the lime stone granule of the granularity < 10mm added simultaneously, along with limestone calcination is active lime, complete decomposition, its density diminishes immediately, namely by high-temperature flue gas fluidisation, and discharge out of the furnace with high-temperature flue gas, then carry out cooling, collecting.For the lime stone granule of granularity > 10mm, due to heavier, can not suspend with high-temperature flue gas in fluidized furnace, so this device can not be used to produce active lime, but for the limestone mine mine tailing of granularity < 20mm, only need carry out simple crushing, be processed into the lime stone of granularity < 10mm, namely can be used for this process units, therefore completely solve the problem of limestone mine mine tailing waste.
The beneficial effect adopting technique scheme to produce is as follows:
(1) the present invention economizes on resources, and improves resource utilization.Utilize fluidized furnace can the lime stone of dinectly bruning granularity < 10mm, solve the problem of limestone mine mine tailing waste, and operation is simple, with low cost, Functionality, quality and appealing design.
(2) small investment, difficulty of construction is low.Most equipment is common apparatus in industry.
(3) operate, safeguard simply.Electrical equipment is mainly blower fan, and fewer.
(4) economize energy.The temperature of outer waste air and finished product ash institute heat content are recycled utilization all to greatest extent.In system, hot equipment and pipeline also adopt heat insulation, isothermal holding, reduce system equipment surface heat loss to greatest extent.
(5) environment-protecting clean.Whole system closed operation, outside arranging except material loading, finished product outward transport airborne dust and system off gas, there is not other points of contamination in whole system.System off gas is through the process of bag-type dust, and dust content is easy to control within national standard.Material loading and finished product arrange separately dust pelletizing system also can meet environmental requirement.Meanwhile, except blower fan in system, the noise equipment large less than other is also very effective to the control of noise.
(6) fuel is widely applicable.No matter be gaseous fuel, liquid fuel or solid fuel, all can effectively use.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation;
Fig. 1 is structural representation of the present invention;
Fig. 2 is fluidized furnace structural representation of the present invention;
Fig. 3 is upper row's sectional schematic diagram of burner 4 when body of heater is rectangle in Fig. 2;
Fig. 4 is the next row sectional schematic diagram of burner 4 when body of heater is rectangle in Fig. 2;
Fig. 5 is upper row's sectional schematic diagram of burner 4 when body of heater is circle in Fig. 2;
Fig. 6 is the next row sectional schematic diagram of burner 4 when body of heater is circle in Fig. 2;
In figure: 1, bucket elevator; 2, raw material cabin; 3, fluidized furnace; 4, burner; 5, the first cyclone dust collectors; 6, cooling chamber; 7, cooling blower; 8, the second cyclone dust collectors; 9, the first finished bin; 10, booster fan; 11, primary air fan; 12, heat exchanger; 13, sack cleaner; 14, air-introduced machine; 15, chimney; 16, the second finished bin; 17, preheating First air pipeline; 18, chute; 19, furnace bottom bellows; 20, distribution plate; 21, fluidized furnace charge pipe; 22, fluidized furnace discharging opening; 23, body of heater.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, a kind of active lime production plant, comprises feeding device, calciner plant, separation and residual heat using device, and calciner plant is fluidized furnace 3.
The structure (see figure 2) of fluidized furnace comprises body of heater 23, furnace bottom bellows 19 are provided with bottom body of heater 23, in body of heater 23, furnace bottom bellows top is provided with distribution plate 20, distribution plate upper furnace body 23 lower disposed has two row's burners 4, between two row's burners 4, body of heater 23 is provided with fluidized furnace charge pipe 21, and body of heater 23 top sidewall is provided with fluidized furnace discharging opening 22; Body of heater 23 is rectangle.
Burner 4 arrangement is the double layouts in relative both sides, sees Fig. 3 and Fig. 4.The double layout in relative both sides, body of heater 23 is the fluidized furnace 3 of rectangle, and relative both sides are arranged in parallel burner 4, and two rows are arranged in every side, and the upper and lower interlaced arrangement in position of upper row's burner 4 and lower row's burner 4, burner 4 position of relative both sides is staggered front to back layout.Namely with body of heater 23 center line for image line, there is burner 4 place side, and opposite side does not have.This kind of layout can make temperature, smoke distribution in fluidized furnace 3 more even, and raw limestone is calcined, suspension effect is good.
Burner 4 fuel is gaseous fuel.Gaseous fuel can be coal gas of converter, coke-stove gas, blast furnace gas, producer gas, natural gas etc.Gaseous fuel is more clean, and operation proportioning is also more convenient, does not almost affect end product quality.
When gaseous fuel is the low heat value such as blast furnace gas or coal gas of converter chiral molecular gaseous fuel, heat exchanger 12 also can carry out preheating to gaseous fuel, to reach raising ignition temperature, economize energy, improves the object of burning velocity.
Feeding device comprises bucket elevator 1, raw material cabin 2 and chute 18, is provided with raw material cabin 2, is provided with star-shaped ash unloading valve below raw material cabin 2, be provided with chute 18 below star-shaped ash unloading valve below bucket elevator 1 discharging opening, and chute 18 outlet communicates with fluidized furnace charge pipe 21;
Separation and residual heat using device comprise the first cyclone dust collectors 5, second cyclone dust collectors 8, sack cleaner 13, cooling chamber 6, cooling blower 7, booster fan 10, heat exchanger 12, primary air fan 11, preheating First air pipeline 17, first finished bin 9, second finished bin 16, air-introduced machine 14 and chimney 15, described first cyclone dust collectors 5 charging aperture communicates with fluidized furnace discharging opening 22, below first cyclone dust collectors 5, discharging opening communicates with cooling chamber 6 charging aperture, cooling chamber 6 air inlet communicates with cooling blower 7 air outlet, cooling chamber 6 discharging opening communicates with the second cyclone dust collectors 8 charging aperture, below second cyclone dust collectors 8, discharging opening communicates with the first finished bin 9, above second cyclone dust collectors 8, air outlet communicates with booster fan 10 air inlet, and booster fan 10 air outlet communicates with fluidized furnace 3 furnace bottom bellows 19, above first cyclone dust collectors 5, high-temperature flue gas outlet communicates with heat exchanger 12 air inlet, heat exchanger 12 gas outlet communicates with sack cleaner 13 charging aperture, the below discharging opening of heat exchanger 12 and sack cleaner 13 is communicated by pipeline, and pipe outlet communicates with the second finished bin 16, heat exchanger 12 air inlet communicates with primary air fan 11 air outlet, and heat exchanger 12 air outlet is communicated with chute 18 and burner 4 respectively by preheating First air pipeline 17, sack cleaner 13 gas outlet communicates with air-introduced machine 14 import, and air-introduced machine 14 is exported and communicated with chimney 15 by smoke discharging pipe.
Fluidized furnace 3, first cyclone dust collectors 5, second cyclone dust collectors 8, sack cleaner 13, preheating First air pipeline 17, chute 18 and cooling chamber 6 outside are provided with insulation material, insulation material can adopt the thermal conductivity factors such as rock wool, silicate aluminum board, pearl expansive rock low, heat-insulating property is good, water absorption rate is low, the insulation material that heat resistance is good.Fluidized furnace 3, first cyclone dust collectors 5 and cooling chamber 6 inside are provided with exotic material, and exotic material mainly uses alkaline-resisting enhancing castable, Low Cement Castable and alumina firebrick etc.
When this device uses, the raw limestone of granularity < 10mm is carried into raw material cabin 2 by bucket elevator 1, be provided with the even blanking of star-shaped ash unloading valve below raw material cabin 2, under valve, raw limestone is blown into fluidized furnace 3 by chute 18 and fluidized furnace charge pipe 21 by the pre-heat primary air in preheating First air pipeline 17; Complete raw limestone calcining work in fluidized furnace 3, heat is supplied by burner 4.
After having calcined, active lime enters the first cyclone dust collectors 5 with high-temperature flue gas, complete fertilizer to be within it separated, major part high temperature active lime falls in cooling chamber 6, cooling blower 7 will cool wind in cooling chamber 6, complete the preheating of cooling air and the cooling of high temperature active lime, and preheating cooling air and cooling active lime enter in the second cyclone dust collectors 8, complete Conveyance hereinto, cooling active lime falls into the first finished bin 9.Preheating cooling air by second cyclone dust collectors 8 purify after from the upper side air outlet discharge through booster fan 10 pressurize after, be blown into fluidized furnace 3, for raw limestone fluidisation from fluidized furnace 3 furnace bottom bellows 19.
Have small part active lime granule to enter in heat exchanger 12 and sack cleaner 13 with high-temperature flue gas in first cyclone dust collectors 5, the powder active lime collected through heat exchanger 12, sack cleaner 13 enters the second finished bin 16.
Primary air fan 11 go out First air and obtain pre-heat primary air through heat exchanger 12 preheating, high-temperature flue gas reduces the temperature to less than 180 DEG C simultaneously, after sack cleaner 13 purified treatment, delivers to the outer row of chimney 15 by air-introduced machine 14; A pre-heat primary air part is as the heat air delivery of conveying raw limestone, raw limestone is blown into fluidized furnace 3 by chute 18 and fluidized furnace charge pipe 21, another part is as the combustion air of burner 4, enter in burner 4 through preheating First air pipeline 17, outer row's high-temperature flue gas institute heat content is utilized.
The main technologic parameters of fluidized furnace 3 active lime calcination is:
Calcining heat 1200 DEG C ± 50 DEG C
Calcination time 3 min-15min
Furnace bottom air temperature 350 DEG C ± 50 DEG C
To come out of the stove air temperature 800 DEG C ± 50 DEG C
Furnace pressure-40 Pa--80Pa
Body of heater 23 is fluidized furnace 3 specification and the active lime daily output table of comparisons of rectangle, in table 1.
Table 1
| Body of heater is the fluidized furnace specification of rectangle | 2.5m×2.5m | 2m×2m |
| The active lime daily output | 150T | 100T |
Apply this device calcining chemical composition when being the raw limestone of table 2, the activity degree of the active lime produced can reach 340ml, Functionality, quality and appealing design.
Table 2
| CaO | SiO 2 | S | Water content |
| ≥52% | ≤1.5% | ≤0.025% | ≤1% |
The active lime itself that this device first cyclone dust collectors 5 are accepted is with a large amount of heats, and high temperature active lime is also inconvenient to store, transport.So, cooling device must be set specially, so that the finished product ash under collected to the first cyclone dust collectors 5 cools.The cooling air simultaneously cooling active lime obtains preheating, can be used for raw limestone fluidisation, and therefore, high temperature active lime institute heat content is utilized to greatest extent, economize energy.
Whole system closed operation, outside arranging except material loading, finished product outward transport airborne dust and system off gas, there is not other points of contamination in whole system.System off gas is through the process of bag-type dust, and dust content is easy to control within national standard.Material loading and finished product arrange separately dust pelletizing system also can meet environmental requirement.Meanwhile, except blower fan in system, the noise equipment large less than other is also very effective to the control of noise.
First finished bin 9 and the second finished bin 16 are divided into and are unloaded ash or pneumatic transport equipment, to be transported outward by active lime.
Embodiment 2
Be that body of heater 23 is for circular with the difference of embodiment 1.
Burner 4 arrangement is annular double layout, sees Fig. 5 and Fig. 6.Annular is double to be arranged as around body of heater 23, and be circular layout two rows burner 4, the upper and lower interlaced arrangement in position of upper row's burner 4 and lower row's burner 4.The double layout of annular is mainly applicable to the larger type of furnace of body of heater sectional dimension.When cross section is larger, the double layout burner 4 in relative both sides has been not enough to meet the temperature requirement in fluidized furnace 3, so must could meet by annular double layout burner 4.
Burner 4 fuel is liquid fuel.Liquid fuel can be all suitable liquid fuels as fuel such as heavy oil, heavy diesel, light diesel.
Body of heater 23 is circular fluidized furnace 3 specification and the active lime daily output table of comparisons, in table 3.
Table 3
| Body of heater is circular fluidized furnace specification | φ4.0m | φ3.6m | φ3.2m | φ2.8m |
| The active lime daily output | 400T | 300T | 200T | 150T |
Embodiment 3
Be that burner 4 fuel is solid fuel with the difference of embodiment 1.Solid fuel is coal dust, should be noted when using coal dust as fuel, will affect the quality of finished activated lime, because the coal ash that in the technology arrangement heat smoke of following current, coal dust is brought into is difficult to separate from finished activated lime.
Claims (5)
1. an active lime production plant, comprise feeding device, calciner plant, be separated and residual heat using device, it is characterized in that: calciner plant is fluidized furnace (3), the structure of fluidized furnace (3) comprises body of heater (23), body of heater (23) bottom is provided with furnace bottom bellows (19), body of heater (23) interior furnace bottom bellows top is provided with distribution plate (20), distribution plate upper furnace body (23) lower disposed has two row's burners (4), between two rows' burner (4), body of heater (23) is provided with fluidized furnace charge pipe (21), body of heater (23) top sidewall is provided with fluidized furnace discharging opening (22), body of heater (23) is rectangle or circle,
Described feeding device comprises bucket elevator (1), raw material cabin (2) and chute (18), raw material cabin (2) is provided with below described bucket elevator (1) discharging opening, raw material cabin (2) below is provided with star-shaped ash unloading valve, be provided with chute (18) below star-shaped ash unloading valve, chute (18) outlet communicates with fluidized furnace charge pipe (21);
Separation and residual heat using device comprise the first cyclone dust collectors (5), second cyclone dust collectors (8), sack cleaner (13), cooling chamber (6), cooling blower (7), booster fan (10), heat exchanger (12), primary air fan (11), preheating First air pipeline (17), first finished bin (9), second finished bin (16), air-introduced machine (14) and chimney (15), described first cyclone dust collectors (5) charging aperture communicates with fluidized furnace discharging opening (22), first cyclone dust collectors (5) below discharging opening communicates with cooling chamber (6) charging aperture, cooling chamber (6) air inlet communicates with cooling blower (7) air outlet, cooling chamber (6) discharging opening communicates with the second cyclone dust collectors (8) charging aperture, second cyclone dust collectors (8) below discharging opening communicates with the first finished bin (9), second cyclone dust collectors (8) top air outlet communicates with booster fan (10) air inlet, and booster fan (10) air outlet communicates with fluidized furnace (3) furnace bottom bellows (19), the high-temperature flue gas outlet of first cyclone dust collectors (5) top communicates with heat exchanger (12) air inlet, heat exchanger (12) gas outlet communicates with sack cleaner (13) charging aperture, the below discharging opening of heat exchanger (12) and sack cleaner (13) is communicated by pipeline, and pipe outlet communicates with the second finished bin (16), heat exchanger (12) air inlet communicates with primary air fan (11) air outlet, and heat exchanger (12) air outlet is communicated with chute (18) and burner (4) respectively by preheating First air pipeline (17), sack cleaner (13) gas outlet communicates with air-introduced machine (14) import, and air-introduced machine (14) outlet is communicated with chimney (15) by smoke discharging pipe.
2. a kind of active lime production plant according to claim 1, is characterized in that described burner (4) arrangement is the double layout in relative both sides or annular double layout; The double layout in described relative both sides, the fluidized furnace (3) that body of heater (23) is rectangle, relative both sides are arranged in parallel burner (4), two rows are arranged in every side, the upper and lower interlaced arrangement in position of upper row's burner (4) and lower row's burner (4), burner (4) position of relative both sides is staggered front to back layout; Annular is double to be arranged as around body of heater (23), and be circular layout two rows burner (4), the upper and lower interlaced arrangement in position of upper row's burner (4) and lower row's burner (4).
3. a kind of active lime production plant according to claim 1, is characterized in that described burner (4) fuel is gaseous fuel, liquid fuel or solid fuel.
4. a kind of active lime production plant according to claim 3, is characterized in that described burner (4) fuel is gaseous fuel.
5. a kind of active lime production plant according to claim 1, is characterized in that described fluidized furnace (3), the first cyclone dust collectors (5), the second cyclone dust collectors (8), sack cleaner (13), preheating First air pipeline (17), chute (18) and cooling chamber (6) outside are provided with insulation material; Described fluidized furnace (3), the first cyclone dust collectors (5) and cooling chamber (6) inside are provided with exotic material.
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| CN106380091A (en) * | 2016-08-31 | 2017-02-08 | 博广热能股份有限公司 | Method for calcining active lime |
| CN106365571A (en) * | 2016-08-31 | 2017-02-01 | 博广热能股份有限公司 | Limestone slag and limestone powder molding method |
| CN107270709A (en) * | 2017-06-14 | 2017-10-20 | 株洲冶炼集团股份有限公司 | A kind of multiple hearth furnace |
| CN107473608A (en) * | 2017-09-30 | 2017-12-15 | 徐州金盟新型建材有限公司 | A kind of active lime producing process |
| CN107673637A (en) * | 2017-12-01 | 2018-02-09 | 河南中蓝新材料科技有限公司 | The suspension roasting device and its production technology of a kind of powdery active lime |
| CN107759115A (en) * | 2017-12-12 | 2018-03-06 | 泰安中意重型工业设备有限公司 | The new process for calcining and device of a kind of powdered lime |
| CN109160749B (en) * | 2018-11-09 | 2021-06-15 | 余松涛 | Internal circulation fine particle lime shaft kiln and calcining method thereof |
| CN110563349B (en) * | 2019-10-15 | 2020-10-02 | 厦门大学 | Two-way shell calcining device |
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| US5269263A (en) * | 1992-09-11 | 1993-12-14 | Foster Wheeler Energy Corporation | Fluidized bed reactor system and method of operating same |
| CN201407888Y (en) * | 2009-03-24 | 2010-02-17 | 新兴河北工程技术有限公司 | Series-flow heat storage energy-saving kiln |
| EP2503273B1 (en) * | 2009-11-16 | 2016-12-07 | Mitsubishi Materials Corporation | Mixing and calcining furnace |
| CN203373276U (en) * | 2013-07-26 | 2014-01-01 | 新兴河北工程技术有限公司 | Active lime production device |
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