CN203947032U - Oxygen-enriched combusting is produced the device of lime - Google Patents

Oxygen-enriched combusting is produced the device of lime Download PDF

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Publication number
CN203947032U
CN203947032U CN201420286045.5U CN201420286045U CN203947032U CN 203947032 U CN203947032 U CN 203947032U CN 201420286045 U CN201420286045 U CN 201420286045U CN 203947032 U CN203947032 U CN 203947032U
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Prior art keywords
oxygen
lime
kiln
pipeline
air
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Expired - Fee Related
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CN201420286045.5U
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Chinese (zh)
Inventor
贾会平
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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Abstract

The utility model relates to the device that a kind of oxygen-enriched combusting is produced lime, and device comprises sleeve kiln and lime rotary kiln, is provided with burner, gas line, primary air duct and secondary air pipeline, and gas line is connected with burner with primary air duct.Primary air duct is connected with oxygen pipeline with gas blower respectively, and secondary air pipeline is connected with oxygen pipeline with airline respectively.Limestone material is sent into lime kiln device through apparatus for feeding, through preheating, calcining and process of cooling, makes lime product.Burning is oxygen-enriched combusting, and use fuel value is 4180~7064KJ/Nm 3low calorie fuels, the oxygen level in combustion air is 26~35%(v).The utility model is by increasing the oxygen level in combustion air, realize sleeve kiln and the lime rotary kiln oxygen-enriched combusting of producing lime, improved the temperature of combustion of low calorie fuels, optimized calcining effect, produce fat lime product, low calorie fuels resource is fully used.

Description

Oxygen-enriched combusting is produced the device of lime
Technical field
The utility model belongs to building materials, chemical production equipment technical field, relates to the device that a kind of oxygen-enriched combusting is produced lime.
Background technology
With lime rotary kiln and sleeve kiln calcined limestone, produce lime and have the advantages such as energy consumption is low, lime product quality is good, throughput is strong, turndown ratio is large, the quickened lime that is widely used in the purposes such as metallurgy, chemical industry is produced.Calcining needs fuel to burn at calcining zone, emits heat heating calcined material.The decomposition temperature of Wingdale is 900 ℃ of left and right, and calcining temperature is generally 1000~1400 ℃.For reaching calcining temperature, produce qualified lime, need the fuel of certain calorific value.Low calorie fuels burning does not reach the temperature of requirement, and Wingdale just can not decompose; Or temperature is low, decomposition of limestone is incomplete, causes raw burn, the ropy problem of lime product.In smelter production process, produce a large amount of blast furnace gases and coal gas of converter, be valuable fuel source, the calorific value of blast furnace gas is 4180~7064KJ/Nm 3(1000~1690 kilocalories), because calorific value is low, can not be directly used in calcined limestone, and a large amount of low calorie fuelss can not be fully used.And produce lime, also need to purchase high performance fuel, cause the wasting of resources, affect economic benefit.
Application number is that 200810231028.0 application for a patent for invention discloses a kind of " closed type calcium carbide furnace tail gas carries out the method for active lime calcination with fuel as rotary kiln ", this patent application be take calcium carbide stove exhaust as raw material, " the clean tail gas after purifying and coke powder or coal dust are sent in the burner of rotary kiln burning system, as the fuel of lime calcining equipment; Wingdale after the preheating of kiln tail hot gas, and is realized predecomposition in shaft preheater, enters the firing system of rotary kiln "." participate in cooling air and enter rotary kiln burning as a wind, through the air participation of preheating, burn and made up the low deficiency of closed calcium carbide furnace tail gas calorific value ".It is combustion air that the cooling air after preheating is used in this patent application, has improved temperature of combustion, but in combustion processes, has still needed to add coal dust or the coke powder of high heating value.
Utility model content
For overcoming the deficiencies in the prior art, the utility model provides a kind of device of oxygen-enriched combusting production lime, strengthens the intensity of combustion of low calorie fuels by oxygen-enriched combusting, improves the quality of limestone calcination temperature and lime product.
The utility model oxygen-enriched combusting is produced the device of lime, comprises sleeve kiln and lime rotary kiln, and sleeve kiln and lime rotary kiln are respectively equipped with apparatus for feeding, discharging equipment, the fuel supply system exhaust emission system of unifying.Device is provided with burner, gas line, primary air duct and secondary air pipeline, and gas line is connected with burner with primary air duct.Primary air duct is connected with oxygen pipeline with gas blower respectively, and blower export and oxygen pipeline are provided with flow control valve.Secondary air pipeline is connected with oxygen pipeline with airline respectively, and airline and oxygen pipeline are provided with flow control valve.
Lime rotary kiln is provided with preheater, water cooler, kiln hood, rotary kiln and kiln hood, and the apparatus for feeding of lime rotary kiln comprises truck, feeder and hopper, and burner is positioned at kiln hood.Feeder and hopper are connected, and hopper is connected with preheater, and preheater is connected to rotary kiln by kiln hood, and rotary kiln is connected to water cooler by kiln hood, and the bottom of water cooler is connected with discharging equipment.Airline and oxygen pipeline are connected to the bottom of water cooler by secondary air pipeline, the air of cool lime is as secondary combustion-supporting wind.Sleeve kiln is provided with opening for feed, waste gas outlet, upper inner core, lower inner core, two-layer firebridge, injector and discharge port, and firebridge is connected with combustion chamber, and burner is positioned at combustion chamber.The injection air entrance of injector is connected with oxygen pipeline with airline, and the outlet of injector is connected to the secondary air entrance of combustion chamber by secondary air pipeline.
The utility model oxygen-enriched combusting is produced the device of lime by increasing the oxygen level in combustion air, realize sleeve kiln and the lime rotary kiln oxygen-enriched combusting of producing lime, improved the temperature of combustion of low calorie fuels, optimized calcining effect, produce fat lime product, low calorie fuels resource is fully used, improves and produce low calorie fuels Business Economic Benefit.Primary air duct is connected with oxygen pipeline with airline respectively with secondary air pipeline, regulates as required the oxygen level in combustion air and secondary combustion-supporting wind, has increased the handiness of oxygen-enriched combusting operation.Use avoids oxygen enrichment high-temp combustion to burn out burner with the burner of cooling sandwith layer.
Accompanying drawing explanation
Fig. 1 is that the utility model oxygen-enriched combusting is produced lime device lime rotary kiln schematic diagram;
Fig. 2 is that the utility model oxygen-enriched combusting is produced lime device sleeve kiln schematic diagram;
Wherein:
1-truck, 2-feeder, 3-hopper, 4-preheater, 5-kiln hood, 6-rotary kiln, 7-kiln hood, 8-burner, 9-gas line, 10-primary air duct, 11-water cooler, 12-airline, 13-oxygen pipeline, 14-discharging equipment, 15-sleeve kiln, 16-upper inner core, 17-firebridge, 18-lower inner core, 19-discharge port, 20-opening for feed, 21-flow control valve, 22-waste gas outlet, 23-secondary air pipeline, 24-injector, 25-injection air entrance.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is elaborated.
Embodiment 1
The device that the utility model oxygen-enriched combusting is produced lime is lime rotary kiln, as shown in Figure 1, lime rotary kiln comprises apparatus for feeding, discharging equipment 14, fuel feed system, exhaust emission system, preheater 4, water cooler 11, rotary kiln 6, kiln hood 5, kiln hood 7, burner 8, gas line 9, primary air duct 10 and secondary air pipeline 23.Apparatus for feeding comprises truck 1, feeder 2 and hopper 3.Burner 8, for the burner with cooling sandwith layer, is positioned at kiln hood, and gas line is connected with burner with primary air duct.Primary air duct is connected with oxygen pipeline with gas blower respectively, and blower export and oxygen pipeline are provided with flow control valve 21.Feeder and hopper are connected, and hopper is connected with preheater, and preheater is connected to the kiln body of rotary kiln by kiln hood, and rotary kiln is connected to water cooler by kiln hood, and the bottom of water cooler is connected with discharging equipment 14.Airline 12 and oxygen pipeline 13 are connected to the bottom of water cooler by secondary air pipeline 23, airline and oxygen pipeline are provided with flow control valve 21.
Lime rotary kiln oxygen-enriched combusting is produced lime process, and limestone material is transported to hopper 3 through truck 1, feeder 2, by hopper, material is sent into preheater 4, and the flue gas after lime rotary kiln calcined limestone enters preheater preheating fresh material.Material after preheating enters rotary kiln 6 through kiln hood 5 and calcines, and the lime after calcining enters water cooler 11, and cooling rear lime product goes out device through discharging equipment 14.Fuel gas enters burner 8 through gas line 9, oxygen in oxygen pipeline enters burner through flow control valve 21 and primary air duct 10, burner ejection fuel gas and combustion air burn in kiln hood 7, a combustion air accounts for the 10%(v of combustion air total amount), by flow control valve on oxygen pipeline, regulate oxygen flow, the flow control valve of gas blower and primary air duct 10 is in closing condition.The air of airline 12 is lime after secondary air pipeline 23 enters the cooling calcining of water cooler, and the flow control valve on oxygen pipeline 13 pipelines is in closing condition.It is that fuel gas burning is combustion-supporting that air after cool lime enters kiln hood as secondary combustion-supporting wind, and secondary combustion-supporting wind accounts for the 90%(v of combustion air total amount).Combustion air and the total oxygen content of secondary combustion-supporting wind are 29%(v).
As selection, the air that gas blower produces enters burner through flow control valve 21 and primary air duct 10, burner ejection fuel gas and combustion air burn in kiln hood 7, a combustion air accounts for the 30%(v of combustion air total amount), by the flow control valve 21 on gas blower pipeline, regulate air flow quantity, now the flow control valve of oxygen pipeline and primary air duct 10 is in closing condition.The cooling airs that airline 12 produces and the oxygen mix of oxygen pipeline 13 enter lime after the cooling calcining of water cooler by secondary air pipeline 23, by regulating the regulation secondary combustion-supporting wind oxygen level of the flow control valve of oxygen pipeline 13 and airline 12, be 35%(v), it is that fuel gas burning is combustion-supporting that oxygen-rich air after cool lime enters kiln hood as secondary combustion-supporting wind, and secondary combustion-supporting wind accounts for the 70%(v of combustion air total amount).Combustion air and the total oxygen content of secondary combustion-supporting wind are 30.8%(v).
Embodiment 2
Another embodiment of the present utility model is sleeve kiln, as shown in Figure 2, sleeve kiln is provided with opening for feed 20, waste gas outlet 22, upper inner core 16, lower inner core 18, two-layer firebridge 17, burner 8, gas line 9, primary air duct 10, secondary air pipeline 23, injector 24 and discharge port 19.Firebridge is connected with combustion chamber, and burner is positioned at combustion chamber, and burner is the burner with cooling sandwith layer.Primary air duct is connected with oxygen pipeline with gas blower respectively, and blower export and oxygen pipeline are provided with flow control valve 21.Cooling blower is connected to the cooling air port entrance of sleeve kiln bottom by pipeline.Injector is provided with injection air entrance 25, injection air outlet and recirculating air entrance, and recirculating air entrance is connected to the recirculating air outlet of lower inner core.Injector entrance is connected with oxygen pipeline with airline, and connecting pipeline is provided with valve.Injector outlet is connected to the secondary air entrance of combustion chamber by secondary air pipeline 23.
Sleeve kiln oxygen-enriched combusting is produced lime process, and limestone material is calcined to calcining zone after opening for feed 20 enters the preheating of sleeve kiln preheating zone, and the lime after calcining is cooling in cooling zone goes out device by discharge port 19.The operation of sleeve kiln oxygen-enriched combusting calcined limestone has three kinds of patterns.
(1) combustion air and secondary combustion-supporting wind are oxygen-rich air, and the oxygen level of oxygen-rich air is 28%(v), a combustion air accounts for the 25%(v of combustion air total amount); Secondary combustion-supporting wind accounts for the 75%(v of combustion air total amount).Fuel gas enters burner 8 through gas line 9, and combustion air and the oxygen mix in oxygen pipeline that gas blower produces enter burner 8 through primary air duct 10.Burner ejection fuel gas and combustion air burn in combustion chamber, by regulating the oxygen level of flow control valve 21 adjusting oxygen-rich air on blower export and oxygen pipeline.The air of airline and the oxygen mix of oxygen pipeline enter injector through injection air entrance, mix the secondary air entrance that enters combustion chamber by injector outlet, secondary air pipeline 23 with recirculating air.By regulating the regulation secondary combustion-supporting wind oxygen level of the flow control valve of oxygen pipeline and airline.Combustion air and the total oxygen content of secondary combustion-supporting wind are 28%(v).
(2) a combustion air is pure oxygen, and secondary combustion-supporting wind is air, and a combustion air accounts for the 15%(v of combustion air total amount), secondary combustion-supporting wind accounts for the 85%(v of combustion air total amount).Fuel gas enters burner 8 through gas line 9, oxygen in oxygen pipeline enters burner through flow control valve 21 and primary air duct 10, burner ejection fuel gas and pure oxygen are in combustion chambers burn, by flow control valve on oxygen pipeline, regulate oxygen flow, the flow control valve of gas blower and primary air duct 10 is in closing condition.The air of airline enters combustion chamber through injector, secondary air pipeline 23 and secondary air entrance, and combustion-supporting for fuel gas burning, the flow control valve on oxygen pipeline is in closing condition.Combustion air and the total oxygen content of secondary combustion-supporting wind are 32.85%(v).
(3) a combustion air is air, and secondary combustion-supporting wind is oxygen-rich air, and the oxygen level of oxygen-rich air is 30%(v), a combustion air accounts for the 20%(v of combustion air total amount), secondary combustion-supporting wind accounts for the 80%(v of combustion air total amount).The air that gas blower produces enters burner through flow control valve 21 and primary air duct 10, and burner ejection fuel gas and air be in combustion chambers burn, now the flow control valve closing condition of oxygen pipeline and primary air duct 10.The air of airline and the oxygen mix of oxygen pipeline enter the combustion-supporting burning in combustion chamber by injector, secondary air pipeline 23, secondary air entrance.By regulating the flow control valve regulation secondary combustion-supporting wind oxygen level of oxygen pipeline and airline, be 30%(v).Combustion air and the total oxygen content of secondary combustion-supporting wind are 28.2%(v).

Claims (4)

1. an oxygen-enriched combusting is produced the device of lime, comprise sleeve kiln (15) and lime rotary kiln, sleeve kiln and lime rotary kiln are respectively equipped with apparatus for feeding, discharging equipment, the fuel supply system exhaust emission system of unifying, described device is provided with burner (8), gas line (9), primary air duct (10) and secondary air pipeline (23), gas line is connected with burner with primary air duct, it is characterized in that: described primary air duct is connected with oxygen pipeline with gas blower respectively, blower export and oxygen pipeline are provided with flow control valve (21); Described secondary air pipeline is connected with oxygen pipeline (13) with airline (12) respectively, and airline and oxygen pipeline are provided with flow control valve.
2. oxygen-enriched combusting according to claim 1 is produced the device of lime, it is characterized in that: described lime rotary kiln is provided with preheater (4), water cooler (11), kiln hood (5), rotary kiln (6) and kiln hood ((7), the apparatus for feeding of lime rotary kiln comprises truck (1), feeder (2) and hopper (3), and burner (8) is positioned at kiln hood; Feeder and hopper are connected, and hopper is connected with preheater, and preheater is connected to rotary kiln (6) by kiln hood, and rotary kiln is connected to water cooler by kiln hood, and the bottom of water cooler is connected with discharging equipment (14); Airline (12) and oxygen pipeline (13) are connected to the bottom of water cooler by secondary air pipeline (23).
3. oxygen-enriched combusting according to claim 1 is produced the device of lime, it is characterized in that: described sleeve kiln (15) is provided with opening for feed (20), waste gas outlet (22), upper inner core (16), lower inner core (18), two-layer firebridge (17), injector (24) and discharge port (19), firebridge is connected with kiln combustion chamber, and burner is positioned at combustion chamber; The injection air entrance of injector is connected with oxygen pipeline with airline, and the outlet of injector is connected to the secondary air entrance of combustion chamber by secondary air pipeline (23).
4. oxygen-enriched combusting according to claim 1 is produced the device of lime, it is characterized in that: described burner (8) is the burner with cooling sandwith layer.
CN201420286045.5U 2014-05-31 2014-05-31 Oxygen-enriched combusting is produced the device of lime Expired - Fee Related CN203947032U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105384363A (en) * 2015-11-24 2016-03-09 洛阳建材建筑设计研究院有限公司 Application method of active lime rotary kiln
CN105698524A (en) * 2016-02-17 2016-06-22 石家庄新华能源环保科技股份有限公司 Regenerative multistage heating rotary kiln device
CN111322868A (en) * 2020-04-01 2020-06-23 海城市国田矿业有限公司 Production method of light-burning kiln with oxygen-enriched combustion-supporting function

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105384363A (en) * 2015-11-24 2016-03-09 洛阳建材建筑设计研究院有限公司 Application method of active lime rotary kiln
CN105384363B (en) * 2015-11-24 2018-05-04 洛阳建材建筑设计研究院有限公司 A kind of application process of Active Lime Rotary Kiln
CN105698524A (en) * 2016-02-17 2016-06-22 石家庄新华能源环保科技股份有限公司 Regenerative multistage heating rotary kiln device
CN105698524B (en) * 2016-02-17 2018-07-06 石家庄新华能源环保科技股份有限公司 Heat accumulating type multistage heating rotary kiln device
CN111322868A (en) * 2020-04-01 2020-06-23 海城市国田矿业有限公司 Production method of light-burning kiln with oxygen-enriched combustion-supporting function

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141119

Termination date: 20170531

CF01 Termination of patent right due to non-payment of annual fee