CN202452488U - Burner for roasting pulverized coal at low temperature in rotary kiln - Google Patents
Burner for roasting pulverized coal at low temperature in rotary kiln Download PDFInfo
- Publication number
- CN202452488U CN202452488U CN2012200217541U CN201220021754U CN202452488U CN 202452488 U CN202452488 U CN 202452488U CN 2012200217541 U CN2012200217541 U CN 2012200217541U CN 201220021754 U CN201220021754 U CN 201220021754U CN 202452488 U CN202452488 U CN 202452488U
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- Prior art keywords
- rotary kiln
- burner
- temperature
- pulverized coal
- air pipe
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Abstract
The utility model discloses a burner for roasting pulverized coal at a low temperature in a rotary kiln. The burner comprises a primary air pipe and a secondary air pipe, a tertiary air pipe is coaxially mounted on the circumference of the secondary air pipe, and a precombustion chamber is arranged at an air outlet of the secondary air pipe; and an oil gun is arranged in the center of the primary air pipe. According to the burner for roasting pulverized coal at the low temperature in the rotary kiln, the design is special and the structure is simple; and the burner is suitable for process and usage requests of the rotary kiln; the combustion temperature of the pulverized coal can be adjusted in a range from 800 DEG C to 1600 DEG C randomly, the burner for roasting pulverized coal at the low temperature in the rotary kiln has the advantages of being bold and bright in flames, ideal in length, full in combustion, strong in plasticity, reasonable in temperature gradient, free of high temperature concentrating area, stable in thermal condition, simple and convenient in production and operation and the like, and the burner for roasting pulverized coal at the low temperature in the rotary kiln is suitable for technology characteristics of large rotary kilns and can meet the technical requirements of roasting production completely.
Description
Technical field
The utility model relates to a kind of pyrometallurgy, and the rotary kiln pulverized coal friring technical field of industries such as cement specifically refers to a kind of rotary kiln low-temperature bake powdered coal burner.
Background technology
Rotary kiln is meant rotation calcining kiln (being commonly called as rotary kiln), belongs to the building equipment class.Rotary kiln can be divided into cement kiln, chemical metallurgy kiln and limekiln by the material handling difference.In coloured and the iron and steel industry, metals such as iron, aluminium, copper, zinc, tin, nickel, tungsten, chromium, file are smelting equipment with the rotary kiln, and ore, concentrate, intermediate etc. are carried out sintering, roasting.
Ordinary burner is used at cement industry maturation, but has following problem in the application of copper concentrate low-temperature bake rotary kiln:
1, common flour coal burner requirement two, tertiary air (accounting for total blast volume more than 90%) they are hot blast, necessary supporting hot air apparatus, and product cost and operating cost are high;
2, the common flour coal burner is applicable to quantity-produced cement kiln sintering; Belong to high-temperature roasting (1300-1400 ℃), and rotary kiln processing nickel (copper) concentrate belongs to low-temperature bake (800-1000 ℃), and produce extremely discontinuous; Breaks in production 2-3 time wanted in per tour; Environmental temperature fluctuation is very big in the kiln, stops kiln fire extinguishing back kiln temperature and often drops to below 600 ℃, therefore will realize very difficulty of flameholding;
3, an ordinary burner designed combustion is used wind, does not consider oxidation sweetening institute required airflow;
4, ordinary burner rifle body is huge, and the kiln hood cover is complicated with the exterior portions configuration, does not meet field condition.
The utility model content
The technical problem that the utility model will solve provides a kind of near operation, anti-dust and good, the anti-scaling loss of the waste gas disturbance performance sustainable burning minimum temperature of fine coal, flame stabilization, rotary kiln powdered coal burner that burn-off rate is high of being adapted at.
For this reason, adopt following technical scheme: a kind of rotary kiln low-temperature bake powdered coal burner, comprise first and second airduct, tertiary-air pipe is coaxially installed on the periphery of said secondary air channel, the affixed precombustion chamber in air outlet place of this secondary air channel; Oil gun is installed at a said airduct center.
The utility model design is unique, simple in structure, is fit to the technology and the instructions for use of rotary kiln more.The ignition temperature of fine coal can be regulated arbitrarily at 800-1600 ℃; Has bold bright, desirable, the sufficient combustion of length of flame; Plasticity reach by force thermograde rationally, no high temperature concentration zones; Advantages such as thermal technology state is stable, production operation is easy, the process characteristic of suitable large-sized rotary kiln can satisfy the specification requirement of baked for producing fully.Burner fully burns coal dust under the effect of one or two tertiary airs, and the content of the CO in the flue gas is less than 0.02%.Temperature 800-1200 ℃ of flame zone (roast area), length of flame 5-10 m; The fine coal unit consumption is no more than the 15kg/t calcining, and unit consumption of heavy oil is no more than 2.0 kg/t calcinings, and the calcining temperature is 350-450 ℃, and rotary kiln production capacity is more than 60t calcining/h.
Description of drawings
Fig. 1 is the structural representation of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model and beneficial effect thereof are done further explain.
The setting of precombustion chamber 3 in the utility model; Make spray into precombustion chamber the initial state mixture by oily flame ignition after because the jet turning effort, in precombustion chamber, form a recirculating zone; Entrainment high temperature gases recirculating to time wind outlet, heat the initial state mixture continuously.Owing to can in precombustion chamber, keep high temperature; This temperature is higher than the ignition temperature of breeze airflow; Thereby coal dust promptly is heated heat up and fire burns; Solve the imperfect combustion problem that ordinary burner directly causes in the kiln internal combustion, thereby reduce the fuel consumption index, eliminate the electric field hidden peril of explosion; The purpose that simultaneously reaches cool burner, slows down scaling loss, prolongs its service life by the wind-force of tertiary-air pipe 9, the effect of adjusting air quantity, temperature and the length of flame of having held concurrently, raising security and reliability.
Being provided with of heavy oil rifle 1 one is to reach the temperature raisings operation before 600 ℃ in order to kiln temperature, the 2nd, and subsequent use during as fine coal feed system fault.
The air outlet of a said airduct 7 is a taper diffusing opening 5, and it is of a size of ф 572/ ф 219, L=500mm; Can be with the secondary wind outlet away from pci port; Be beneficial to fine coal and better spread, delay wind and secondary wind incorporation time, effectively keep the temperature and the flame stabilization of combustion zone.
The head of said oil gun 1 is installed bluff body 4, the connecting rod of this bluff body 4 through being set in the oil gun periphery with place the bluff body adjusting handle 14 of said oil gun 1 afterbody affixed; And bluff body 4 is in the front end of an airduct 7.Move forward and backward bluff body 4 through adjusting handle 14, make it and airduct diffusing opening 5 mating reactions, can adjust flame profile.60 ° of Streamline Design are adopted in the windward side of this bluff body 4, reduce the negative pressuren zone that produces, and alleviate the backflow effect.
Secondary wind spinning disk 6 is installed at said first and second airduct 7, the air outlet place between 8, is used to improve secondary wind speed and coal powder injection speed, strengthens coal, wind mixes, satisfied requirement of lighting with after-flame.
In the accompanying drawing 1: 10 is mounting flange, and 11 is the tertiary-air pipe air inlet, and 12 is the secondary air channel air inlet, and 13 is the igniter afterbody, and 15 is an airduct air inlet, and 16 is the oil gun afterbody.
Embodiment 2, the igniter 2 among the embodiment 1 that dismantles, but be a kind of manual firing's rotary kiln low-temperature bake powdered coal burner.
Claims (6)
1. a rotary kiln low-temperature bake powdered coal burner comprises first and second airduct (7,8), and it is characterized in that: tertiary-air pipe (9) is coaxially installed on the periphery of said secondary air channel (8), the affixed precombustion chamber in air outlet place (3) of this secondary air channel (8); Oil gun (1) is installed at a said airduct (7) center.
2. a kind of rotary kiln low-temperature bake powdered coal burner according to claim 1 is characterized in that: said precombustion chamber (3) is the anterior conical pipe that is, the rear portion is the combination diffusing opening of cylindrical tube.
3. a kind of rotary kiln low-temperature bake powdered coal burner according to claim 1 and 2 is characterized in that: said precombustion chamber (3) adopts the ZG-3Cr26Ni9SiMnMoNre high-temperature steel to process.
4. a kind of rotary kiln low-temperature bake powdered coal burner according to claim 1 is characterized in that: the air outlet of a said airduct (7) is taper diffusing opening (5).
5. a kind of rotary kiln low-temperature bake powdered coal burner according to claim 1; It is characterized in that: the head of said oil gun (1) is installed bluff body (4), and this bluff body (4) is connected with the bluff body adjusting handle (14) that places said oil gun (1) afterbody through connecting rod; And bluff body (4) is in the front end of an airduct (7).
6. a kind of rotary kiln low-temperature bake powdered coal burner according to claim 1 is characterized in that: secondary wind spinning disk (6) is installed at the air outlet place between said first and second airduct (7,8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200217541U CN202452488U (en) | 2012-01-18 | 2012-01-18 | Burner for roasting pulverized coal at low temperature in rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200217541U CN202452488U (en) | 2012-01-18 | 2012-01-18 | Burner for roasting pulverized coal at low temperature in rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202452488U true CN202452488U (en) | 2012-09-26 |
Family
ID=46868350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200217541U Expired - Fee Related CN202452488U (en) | 2012-01-18 | 2012-01-18 | Burner for roasting pulverized coal at low temperature in rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202452488U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014372A (en) * | 2012-12-17 | 2013-04-03 | 葫芦岛炼锌厂 | Zinc smelting device for gas rotary kiln |
| CN106196039A (en) * | 2016-08-29 | 2016-12-07 | 煤科院节能技术有限公司 | A kind of slotted blunt |
| CN111023083A (en) * | 2019-12-19 | 2020-04-17 | 哈尔滨工业大学 | W flame boiler adopting cyclone burner |
-
2012
- 2012-01-18 CN CN2012200217541U patent/CN202452488U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014372A (en) * | 2012-12-17 | 2013-04-03 | 葫芦岛炼锌厂 | Zinc smelting device for gas rotary kiln |
| CN106196039A (en) * | 2016-08-29 | 2016-12-07 | 煤科院节能技术有限公司 | A kind of slotted blunt |
| CN106196039B (en) * | 2016-08-29 | 2018-05-25 | 煤科院节能技术有限公司 | A kind of slotted blunt |
| CN111023083A (en) * | 2019-12-19 | 2020-04-17 | 哈尔滨工业大学 | W flame boiler adopting cyclone burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20150118 |
|
| EXPY | Termination of patent right or utility model |