CN201531897U - Combustion improver for a low-calorie blast furnace gas straight-flow combustion system - Google Patents
Combustion improver for a low-calorie blast furnace gas straight-flow combustion system Download PDFInfo
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- CN201531897U CN201531897U CN2009202230271U CN200920223027U CN201531897U CN 201531897 U CN201531897 U CN 201531897U CN 2009202230271 U CN2009202230271 U CN 2009202230271U CN 200920223027 U CN200920223027 U CN 200920223027U CN 201531897 U CN201531897 U CN 201531897U
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Abstract
The utility model relates to a combustion improver for a low-calorie blast furnace gas straight-flow combustion system, which belongs to the technical field of blast furnace gas combustion. The combustion improver comprises a support frame (1) and a barrel-type main body (2), wherein the barrel-type main body (2) is arranged on the support frame (1), and is retained on a gas turbulent flow primary forming section through the support frame (1) within 1.5 to 2m in front of a combustor. The support frame (1) is built based on and vertical to the bottom of a hearth, and is arranged below the combustor, and the central line of the support frame (1) extends to pass through the cylindrical center of the barrel-type main body. The advantages lie in that the combustion improver can reduce ignition time from 1.5 to 2 hours to 40 to 50 minutes, and can burn low-calorie blast furnace gas 9.5 to 11 kNm3 per hour, and the caloric value of blast furnace gas is 600 kcal/Nm3.
Description
Technical field
The utility model belongs to the blast furnace gas field of combustion technology, a kind of low combustion value furnace gas single flow combustion system auxiliary combustion equipment particularly is provided, be used for iron and steel enterprise's byproduct blast furnace gas low heat value partial combustion and utilize the field, be specially adapted to the effective application under the direct current spray combustion mode.
Background technology
The generation of byproduct blast furnace gas is absolutely necessary in the production of iron and steel enterprise, wherein because many-sided factors such as production, post-processed, produce the low heat value blast furnace gas inferior of different content, this part coal gas or by being diffused and can not effectively utilize, or add a certain amount of other high-quality fuel and carry out mixed combustion.And the content of the CO of this part coal gas that burns used is lower than 23%, and the high low heat value blast furnace gas inferior of water content, dustiness, must adopt the burner of being convenient to fuel mix, and cost is higher, buys with regard to the 10t/h gas furnace and installation cost increases about 10%.
Because of the characteristics of parallel flow burner are that fuel and combustion-supporting gas are pressed ejection with the flow path band of opposing parallel, so fuel and combustion adjuvant mixability are poor, are difficult to form turbulent combustion, therefore in reality, it is far away from burner to light identity distance, and flame root and combustion front identity distance are from bigger.Add small amounts of natural gas in experiment, the result has the phenomenon of natural gas in flame end (burning the band rear portion) burning when a stove burns.This phenomenon explanation fuel and combustion adjuvant are not enough in the mix stages mixability, and because fuel value is low, light and the equal difficulty of sustained combustion, and easily fire extinguishing has great potential safety hazard.
Summary of the invention
The purpose of this utility model is to provide a kind of low combustion value furnace gas single flow combustion system auxiliary combustion equipment, has solved the not convenient usefulness of iron and steel byproduct and the energy waste problem that causes.Has the gas utilization rate inferior of raising, effects such as efficiency of combustion.
The utility model is made of tubular body device and two parts of support, as shown in Figure 1, comprise support, tubular body device two parts, the tubular body device is positioned on the support, be fixed in the combustion gas turbulent flow section of beginning to take shape by support, 1.5～2m scope before burner (annotate: tubular body device position is in concrete use, but based on fuel and combustion case are adjusted); Support is built to build based on burner hearth bottom and formed, and is positioned at the burner below, and is vertical with burner hearth bottom, and the center line extended line is by the cylinder center of circle of tubular body device.Wherein, the tubular body device is to be built by the refractory material that accumulation of heat character is arranged to grow into burner diameter
The tubular cylinder, the external diameter of tubular cylinder is
Burner diameter, wall thickness are 15～32cm, and it act as upsets air-flow and accumulate part heat (details are section as follows), thereby makes more efficient burning of fuel.Support is that thickness is the fire-resistant trapezoidal stage body of 15～40cm, and concrete An Jiantai cover is decided by the weight and the length of apparatus main body, can be 2 or 3, can play effective stationary body equipment and get final product.Because of apparatus main body and support are refractory material, can build to build build by refractory cement and close, make it stable.
The auxiliary combustion equipment that the utility model and single flow burner match and use, this device is installed on the combustion front face that forms after the igniting, each burner is made a reverse bumpy flow artificially near the outlet of air gas mixed airflow, by it entrainmenting of ambient gas is used for keeping the stable of flame.Be specially in the turbulent combustion band incipient stage, that is, and advection combustion zone end, one cylindrical fire-resistant bucket laterally is installed,, is effectively formed a combustion front face early by the air-flow intervention, and make refractory material absorb certain heat, to lighting and accumulation of energy smoothly of follow-up gas.
The Theoretical Fundamentals of Combustion of this device: air-flow around being to flow and Ku Ta-scholar Koffsky lift theorem according to hydromechanical circular rector around cylinder.Promptly, act on the lift on the unit length object, its size equals infinite distant place and locates speed V ∞, the density p of fluid and around the velocity circulation Г of object three's product, its direction is infinite distant place speed of incoming flow V ∞ recirculate direction rotation 90o, or say fluid when cylinder axis rotates, cylinder will be subjected to the side force vertical with coming flow path direction.The design's characteristics are can install to acquire on original Equipment Foundations, no longer carry out the operational mode of the equipment dismounting or the equipment of adjustment.
With the 10t/h boiler is example, do not add this facility before, the some stove is installed this device and afterwards can be advanced to 40～50 minutes the time to burning normal need 1.5 hours～2 hours, the incendivity low combustion value furnace gas is 9.5～11kNm3 per hour.Blast furnace gas calorific value 600kcal/Nm
3
Description of drawings
Fig. 1 is the utility model structure chart.Wherein, support 1, tubular body device 2.
Fig. 2 is the left cutaway view of Fig. 1.Wherein, support 1, tubular body device 2.
Fig. 3 is a gas-flow sketch behind the installation auxiliary combustion equipment.Wherein, at the bottom of support 1, tubular body device 2, gas-flow 3, furnace body outer wall 4, gas piping 5, the burner chamber 6, warm-air pipe.
The specific embodiment
This device is made by common refractory, and the most frequently used is refractory brick and refractory.Concrete installation site is before turbulent flow forms section, because of different burners and fuel will have concrete differentiation, usually apart from 1～2 meter of burner outlet.To help to form as early as possible the turbulence state, thereby improve efficiency of combustion.And because of the own uptake of auxiliary combustion equipment that refractory material is made just can be ignited follow-up fuel.
Shown in subordinate list 1, different burners are counted institute's corresponding intrument platform cover, installation site and device height of column.This plant bulk is specifically distinguished with the installation site and the platform number of burner, but generally the diameter of this cylinder all is as the criterion with≤1/2 burner diameter.
Subordinate list 1 boiler burner number is installed special plain correspondence table with device
Annotate: because of burning feature, the installation of burner all occurs with the even number of symmetry, and the single flow burner generally is no more than 8.
Claims (3)
1. low combustion value furnace gas single flow combustion system auxiliary combustion equipment, it is characterized in that, comprise support (1), tubular body device (2) two parts, tubular body device (2) is positioned on the support (1), be fixed in the combustion gas turbulent flow section of beginning to take shape by support (1), 1.5～2m scope before burner; Support (1) is built to build based on burner hearth bottom and formed, and is positioned at the burner below, and is vertical with burner hearth bottom, and the center line extended line is by the cylinder center of circle of tubular body device.
2. low combustion value furnace gas single flow combustion system auxiliary combustion equipment according to claim 1 is characterized in that, tubular body device (2) is to be built by the refractory material that accumulation of heat character is arranged to grow into burner diameter
The tubular cylinder, the external diameter of tubular cylinder is
Burner diameter, wall thickness are 15～32cm.
3. low combustion value furnace gas single flow combustion system auxiliary combustion equipment according to claim 1 is characterized in that, support (1) is the trapezoidal stage body of 15～40cm for thickness, is built by refractory cement and builds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202230271U CN201531897U (en) | 2009-10-09 | 2009-10-09 | Combustion improver for a low-calorie blast furnace gas straight-flow combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202230271U CN201531897U (en) | 2009-10-09 | 2009-10-09 | Combustion improver for a low-calorie blast furnace gas straight-flow combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201531897U true CN201531897U (en) | 2010-07-21 |
Family
ID=42527301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202230271U Expired - Lifetime CN201531897U (en) | 2009-10-09 | 2009-10-09 | Combustion improver for a low-calorie blast furnace gas straight-flow combustion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201531897U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072651A (en) * | 2011-01-04 | 2011-05-25 | 中冶南方(武汉)威仕工业炉有限公司 | Heat accumulating type heating furnace totally using blast furnace gas as fuel |
-
2009
- 2009-10-09 CN CN2009202230271U patent/CN201531897U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072651A (en) * | 2011-01-04 | 2011-05-25 | 中冶南方(武汉)威仕工业炉有限公司 | Heat accumulating type heating furnace totally using blast furnace gas as fuel |
| CN102072651B (en) * | 2011-01-04 | 2013-01-09 | 中冶南方(武汉)威仕工业炉有限公司 | Heat accumulating type heating furnace totally using blast furnace gas as fuel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee after: Shougang Group Co. Ltd. Patentee after: Qinhuangdao Shouqin Metal Material Co., Ltd. Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee before: Capital Iron & Steel General Company Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100721 |
|
| CX01 | Expiry of patent term |