CN204224467U - Limestone kiln and system for producing calcium carbide - Google Patents

Limestone kiln and system for producing calcium carbide Download PDF

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Publication number
CN204224467U
CN204224467U CN201420550291.7U CN201420550291U CN204224467U CN 204224467 U CN204224467 U CN 204224467U CN 201420550291 U CN201420550291 U CN 201420550291U CN 204224467 U CN204224467 U CN 204224467U
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burning
kiln
limestone kiln
burner blower
suction
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CN201420550291.7U
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杜景忠
赵西明
杜文轩
聂全胜
景会
俞慧军
郝博
聂开斌
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China National Salt Industry Corp Jilantai Salt Chemical Group
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China National Salt Industry Corp Jilantai Salt Chemical Group
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/40Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

Abstract

The utility model discloses a kind of limestone kiln and system for producing calcium carbide, this limestone kiln comprises: kiln body (1), and this kiln body comprises the upper suction beam (12) arranged successively, upper burning beam (13), lower burning beam (14) and lower suction beam (15) from top to bottom; Combustion air device, this combustion air device comprises burner blower (5), and this burner blower communicates with described upper burning beam and lower burning beam respectively; Waste gas exhausting device, this waste gas exhausting device comprises exhaust gas fan (6), and this exhaust gas fan communicates with the venting port of described upper suction beam; The venting port of described lower suction beam communicates with the inlet mouth of described burner blower.Above-mentioned limestone kiln can utilize the higher cooling air of temperature of the lime in limestone kiln after cooling calcining to carry out combustion-supporting, reduce the thermal losses in limestone kiln, and the cooling air after using is by burner blower sucking-off, can reduce the load of exhaust gas fan simultaneously, save energy, improves the production efficiency in limestone kiln.

Description

Limestone kiln and system for producing calcium carbide
Technical field
The utility model relates to production of construction materials field, particularly, relates to a kind of limestone kiln and system for producing calcium carbide.
Background technology
The industry such as calcium carbide industry, Iron And Steel Industry, aluminum oxide industry, refractory materials are all lime consumption rich anies influential family, and these industries are all the state of high speed development in recent years, and lime has huge demand as the main raw required for these industries or subsidiary material.
In tradition, produce lime limestone kiln used by the feeding device storage of raw materials on kiln body top being arranged on limestone kiln, then raw material makes lime after preheating, calcining and cooling, sends kiln body finally by drawing mechanism, completes the production of lime.
Normal temperature air in air is directly sent in kiln body combustion-supporting by burner blower by combustion air in the limestone kiln in tradition needed for lime kilning usually, or sends in kiln body combustion-supporting after interchanger heat exchange again by normal temperature air.But, due to kiln temperature higher (about 1200 DEG C), even and the temperature of air after interchanger heat exchange generally also only can reach about 180 DEG C, therefore relative to the calcining temperature (about 1200 DEG C) in limestone kiln, the combustion air that temperature is lower causes thermal losses larger in the calcination process of limestone kiln, limits the lime production in limestone kiln.
Therefore, wish that the thermal losses in the lime kilning process of limestone kiln can be reduced in a kind of limestone kiln, and then improve the output in limestone kiln.
Utility model content
Contriver finds after deliberation, the temperature of cooling air after cool lime for cooling the lime after calcining in limestone kiln can reach about 200 DEG C, this part high-temperature gas is just directly discharged without utilization usually, causes the waste of heat, and increases the load of exhaust gas fan.
The purpose of this utility model is to provide a kind of limestone kiln, and this limestone kiln can utilize the cooling air of the lime in limestone kiln after cooling calcining, to reduce the thermal losses in limestone kiln.
To achieve these goals, the utility model provides a kind of limestone kiln, and this limestone kiln comprises: kiln body, and this kiln body comprises the upper suction beam arranged successively, upper burning beam, lower burning beam and lower suction beam from top to bottom; Combustion air device, this combustion air device comprises burner blower, and this burner blower communicates with described upper burning beam and lower burning beam respectively, combustion air to be sent into described upper burning beam and described lower burning beam; Waste gas exhausting device, this waste gas exhausting device comprises exhaust gas fan, and this exhaust gas fan communicates with the venting port of described upper suction beam, to be discharged by the waste gas after described kiln body combustion; The venting port of described lower suction beam communicates with the inlet mouth of described burner blower.
Preferably, described combustion-supporting wind system also comprises interchanger, the high temperature conduit entrance of described interchanger is connected with described upper suction beam, the high temperature conduit outlet of described interchanger is connected with described exhaust gas fan, the connection of the cryogenic pipe entrance of described interchanger and the air outlet of described burner blower, the cryogenic pipe outlet of described interchanger is connected with described upper burning beam and described lower burning beam.
Preferably, the high temperature conduit of described interchanger exports and be provided with the first cleaning apparatus between described exhaust gas fan.
Preferably, this limestone kiln also comprises auxiliary burner blower, and the inlet mouth of this auxiliary burner blower is communicated with air, and the air outlet of described auxiliary burner blower communicates with the air outlet of described burner blower.
Preferably, the second cleaning apparatus is provided with between described lower suction beam and the inlet mouth of described burner blower.
Preferably, between described lower suction beam and the inlet mouth of described burner blower, be provided with the straight-through pipeline in parallel with described second cleaning apparatus, described straight-through pipeline is provided with stopping valve.
Preferably, be provided with evacuated tube between the air outlet of described burner blower and the cryogenic pipe entrance of described interchanger, described evacuated tube is provided with stopping valve.
According to another aspect of the present utility model, a kind of system for producing calcium carbide is provided, comprise furnace of calcium carbide and limestone kiln, described limestone kiln is above-mentioned limestone kiln, the kiln body discharge port in described limestone kiln is connected with the opening for feed of described furnace of calcium carbide, and the calcium carbide furnace gas that described furnace of calcium carbide produces sends into the upper burning beam in described limestone kiln and lower burning beam for burning.
Preferably, the calcium carbide furnace gas of described furnace of calcium carbide outlet and be provided with the 3rd cleaning apparatus between described upper burning beam and described lower burning beam.
By technique scheme, the higher cooling air of temperature of the lime in limestone kiln after cooling calcining can be utilized to carry out combustion-supporting, reduce the thermal losses in limestone kiln, and the cooling air after using is by burner blower sucking-off, the load of exhaust gas fan can be reduced, save energy simultaneously, improve the production efficiency in limestone kiln.
Other features and advantages of the utility model are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification sheets, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is the schematic diagram in the limestone kiln according to a kind of embodiment of the present utility model.
Description of reference numerals
1 kiln body; 11 feeding devices;
Suction beam on 12; Burning beam on 13;
14 times burning beams; 15 times suction beams;
16 heat-conducting oil pipes; 17 discharging batch boxes;
2 interchanger; 21 high temperature conduit entrances;
22 high temperature conduit outlets; 23 cryogenic pipe entrances;
24 cryogenic pipe outlets; 3 calcium carbide furnace gas pipelines;
4 evacuated tube; 5 burner blowers;
6 exhaust gas fans; 7 first cleaning apparatuss;
8 auxiliary burner blowers; 9 second cleaning apparatuss;
91 straight-through pipelines.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
In the utility model, when not doing contrary explanation, the noun of locality of use typically refers to vertical direction upper and lower along limestone kiln as " upper and lower, ".
According to an aspect of the present utility model, provide a kind of limestone kiln, this limestone kiln comprises: kiln body 1, and this kiln body 1 comprises upper suction beam 12, upper burning beam 13, lower burning beam 14 and the lower suction beam 15 arranged successively from top to bottom; Combustion air device, this combustion air device comprises burner blower 5, and this burner blower 5 communicates with described upper burning beam 13 and lower burning beam 14 respectively, combustion air to be sent into described upper burning beam 13 and described lower burning beam 14; Waste gas exhausting device, this waste gas exhausting device comprises exhaust gas fan 6, and this exhaust gas fan 6 communicates with the venting port of described upper suction beam 12, to be discharged by the waste gas after described kiln body 1 combustion; The venting port of described lower suction beam 15 communicates with the inlet mouth of described burner blower 5.
Pass through technique scheme, the higher cooling air of temperature of the lime in limestone kiln after cooling calcining is connected with the inlet mouth of burner blower 5 through lower suction beam 15, cooling air higher for described temperature is used for combustion-supporting, reduce the thermal losses in limestone kiln, and the cooling air after using is by burner blower 5 sucking-off, the load of exhaust gas fan 6 can be reduced, save energy simultaneously, improve the production efficiency in limestone kiln.
See Fig. 1, raw material storage is being positioned at the feeding device 11 on top of kiln body 1 in limestone kiln, and successively through distribute from top to bottom preheating zone, calcining zone, auxiliary calcining zone and cooling zone, last lime is transported by the hopper 17 be positioned on the downside of cooling zone, wherein, described preheating zone is between upper suction beam 12 and upper burning beam 13, and the high-temp waste gas produced after utilizing lime kilning carries out preheating to reduce the thermal losses in limestone kiln to raw material; Described calcining zone between upper burning beam 13 and lower burning beam 14, for lime kilning; Described auxiliary calcining zone, between lower burning beam 14 and lower suction beam 15, makes the raw material do not decomposed completely in calcining zone continue calcining and decomposing under the condition comparatively relaxed; Described cooling zone is between lower suction beam 15 and the cooling blower of bottom being arranged on kiln body 1, and for cooling the lime after calcining, described cooling blower can arrange in position according to actual needs.
After cool lime, the temperature of cooling air generally can reach about 200 DEG C, compare temperature with the air after normal temperature air and heat exchange all obviously to raise, therefore the thermal losses in limestone kiln can effectively be reduced, and, utilize burner blower 5 to extract the load that the cooling air after use can also reduce exhaust gas fan 6 out, avoid the underproof due to exhaust gas fan 6 to cause cooling air suction effect poor, make cooling air enter described auxiliary calcining zone affect limestone kiln produce the quality of lime.
Preferably, described combustion-supporting wind system also comprises interchanger 2, the high temperature conduit entrance 21 of described interchanger 2 is connected with described upper suction beam 12, the high temperature conduit outlet 22 of described interchanger 2 is connected with described exhaust gas fan 6, the cryogenic pipe entrance 23 of described interchanger 2 and the connection of the air outlet of described burner blower 5, the cryogenic pipe outlet 24 of described interchanger 2 is connected with described upper burning beam 13 and described lower burning beam 14.
The high-temp waste gas that interchanger 2 produces after utilizing limestone kiln lime kilning heats again to the cooling air after use, the temperature of further raising combustion air, reduce the thermal losses in limestone kiln, and after interchanger 2 heat exchange, the temperature of the high-temp waste gas got rid of by upper suction beam 12 also decreases, and can reduce the infringement of high-temp waste gas to exhaust gas fan 6 and pipeline.
Because the waste gas dustiness of discharging through upper suction beam 12 is comparatively large, easily causes exhaust gas fan 6 to block, and cause environmental pollution, therefore, preferably, between the high temperature conduit outlet 22 of described interchanger 2 and described exhaust gas fan 6, be provided with the first cleaning apparatus 7.
The damage of high-temp waste gas to cleaning apparatus can be reduced after first cleaning apparatus 7 being arranged on interchanger 2.The type of the first cleaning apparatus 7 can be selected according to practical situation, such as, and tornado dust collector, gravitational precipitator etc.
Preferably, this limestone kiln also comprises auxiliary burner blower 8, and the inlet mouth of this auxiliary burner blower 8 is communicated with air, and the air outlet of described auxiliary burner blower 8 communicates with the air outlet of described burner blower 5.
See Fig. 1, the air outlet of auxiliary burner blower 8 communicates with the air outlet of burner blower 5, make auxiliary burner blower 8 can burner blower 5 can upwards burning beam 13 and lower burning beam 14 air feed jointly, when the deficiency in draught of burner blower 5 by two common air feeds of burner blower with ensure on the air feed of burning beam 13 and lower burning beam 14, wherein, the air outlet of described auxiliary burner blower 8 is preferably connected between the cryogenic pipe entrance 23 of interchanger 2 and the air outlet of burner blower 5, the combustion air that auxiliary burner blower 8 is sent is used further to combustion-supporting after interchanger 2 heat exchange, reduce the thermal losses in limestone kiln.
Because the cooling air dustiness after cool lime is comparatively large, easily cause the stifled ash of the pipeline of burner blower 5 and interchanger 2, therefore, preferably, between described lower suction beam 15 and the inlet mouth of described burner blower 5, be provided with the second cleaning apparatus 9.
Limestone kiln is caused to use when breaking down for avoiding the second cleaning apparatus 9, therefore, preferably, between described lower suction beam 15 and the inlet mouth of described burner blower 5, be provided with the straight-through pipeline 91 in parallel with described second cleaning apparatus 9, described straight-through pipeline 91 is provided with stopping valve.When the second cleaning apparatus 9 breaks down, described stopping valve can be opened, make cooling air walk around the second cleaning apparatus 9 and be directly connected with burner blower 5.
In addition, the combustion air sent for avoiding burner blower 5 too much affects the combustion efficacy of burning beam, preferably, between the air outlet of described burner blower 5 and the cryogenic pipe entrance 23 of described interchanger 2, be provided with evacuated tube 4, described evacuated tube 4 is provided with stopping valve.Described stopping valve can be opened, by emptying for unnecessary combustion air when the combustion air that burner blower 5 is sent is too much.
Due to the calcining zone in limestone kiln and the temperature of auxiliary calcining zone higher, in order to avoid high temperature is to the infringement of upper burning beam 13, lower burning beam 14 and lower suction beam 15, preferably heat-conducting oil pipes 16 is set at upper burning beam 13, lower burning beam 14 and lower suction beam 15.
The utility model also provides a kind of system for producing calcium carbide, comprise furnace of calcium carbide and limestone kiln, described limestone kiln is above-mentioned limestone kiln, kiln body 1 discharge port in described limestone kiln is connected with the opening for feed of described furnace of calcium carbide, and the calcium carbide furnace gas that described furnace of calcium carbide produces sends into the upper burning beam 13 in described limestone kiln and lower burning beam 14 for burning.
Lime is the important source material of producing calcium carbide, and the fuel that the calcium carbide furnace gas that furnace of calcium carbide production calcium carbide produces also can be used as (calcium carbide furnace gas comprises: carbon monoxide, hydrogen, methane etc.) limestone kiln uses, in addition the tapping temperature of calcium carbide furnace gas higher (400 ~ 800 DEG C), the thermal losses in limestone kiln also can be reduced as fuel, therefore, the calcium carbide furnace gas that furnace of calcium carbide produces is transported to limestone kiln as fuel through calcium carbide furnace gas pipeline 3, and the lime that limestone kiln is produced is transported to furnace of calcium carbide through hopper 17, avoid the waste of the energy, and save the transportation cost of lime.
For avoiding the impurity blocking pipe in calcium carbide furnace gas, preferably, the calcium carbide furnace gas of described furnace of calcium carbide outlet and be provided with the 3rd cleaning apparatus between described upper burning beam 13 and described lower burning beam 14.
Below preferred implementation of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible array mode.
In addition, also can carry out arbitrary combination between various different embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.

Claims (9)

1. limestone kiln, this limestone kiln comprises:
Kiln body (1), this kiln body (1) comprises the upper suction beam (12) arranged successively, upper burning beam (13), lower burning beam (14) and lower suction beam (15) from top to bottom;
Combustion air device, this combustion air device comprises burner blower (5), this burner blower (5) communicates with described upper burning beam (13) and lower burning beam (14) respectively, combustion air to be sent into described upper burning beam (13) and described lower burning beam (14);
Waste gas exhausting device, this waste gas exhausting device comprises exhaust gas fan (6), and this exhaust gas fan (6) communicates with the venting port of described upper suction beam (12), to be discharged by the waste gas after described kiln body (1) combustion; It is characterized in that, the venting port of described lower suction beam (15) communicates with the inlet mouth of described burner blower (5).
2. limestone kiln according to claim 1, it is characterized in that, described combustion-supporting wind system also comprises interchanger (2), the high temperature conduit entrance (21) of described interchanger (2) is connected with described upper suction beam (12), high temperature conduit outlet (22) of described interchanger (2) is connected with described exhaust gas fan (6), the connection of the cryogenic pipe entrance (23) of described interchanger (2) and the air outlet of described burner blower (5), cryogenic pipe outlet (24) of described interchanger (2) is connected with described upper burning beam (13) and described lower burning beam (14).
3. limestone kiln according to claim 2, is characterized in that, is provided with the first cleaning apparatus (7) between high temperature conduit outlet (22) of described interchanger (2) and described exhaust gas fan (6).
4. limestone kiln according to claim 1, it is characterized in that, this limestone kiln also comprises auxiliary burner blower (8), the inlet mouth of this auxiliary burner blower (8) is communicated with air, and the air outlet of described auxiliary burner blower (8) communicates with the air outlet of described burner blower (5).
5. limestone kiln according to claim 1, is characterized in that, is provided with the second cleaning apparatus (9) between the inlet mouth of described lower suction beam (15) and described burner blower (5).
6. limestone kiln according to claim 5, it is characterized in that, be provided with the straight-through pipeline (91) in parallel with described second cleaning apparatus (9) between described lower suction beam (15) and the inlet mouth of described burner blower (5), described straight-through pipeline (91) is provided with stopping valve.
7. limestone kiln according to claim 2, it is characterized in that, be provided with evacuated tube (4) between the air outlet of described burner blower (5) and the cryogenic pipe entrance (23) of described interchanger (2), (4) are provided with stopping valve to described evacuated tube.
8. system for producing calcium carbide, comprise furnace of calcium carbide and limestone kiln, it is characterized in that, the limestone kiln of described limestone kiln according to any one of claim 1-7, kiln body (1) discharge port in described limestone kiln is connected with the opening for feed of described furnace of calcium carbide, and the calcium carbide furnace gas that described furnace of calcium carbide produces sends into the upper burning beam (13) in described limestone kiln and lower burning beam (14) for burning.
9. system for producing calcium carbide according to claim 8, is characterized in that, the outlet of the calcium carbide furnace gas of described furnace of calcium carbide and be provided with the 3rd cleaning apparatus between described upper burning beam (13) and described lower burning beam (14).
CN201420550291.7U 2014-09-22 2014-09-22 Limestone kiln and system for producing calcium carbide Active CN204224467U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111302674A (en) * 2020-02-26 2020-06-19 上海柯来浦能源科技有限公司 Beam type lime kiln with auxiliary beam
CN111825349A (en) * 2020-06-18 2020-10-27 西安交通大学 Lime-calcium carbide co-production system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111302674A (en) * 2020-02-26 2020-06-19 上海柯来浦能源科技有限公司 Beam type lime kiln with auxiliary beam
CN111825349A (en) * 2020-06-18 2020-10-27 西安交通大学 Lime-calcium carbide co-production system and method
CN111825349B (en) * 2020-06-18 2021-09-07 西安交通大学 Lime-calcium carbide co-production system and method

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