CN201896179U - Roaster of blast stove - Google Patents

Roaster of blast stove Download PDF

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Publication number
CN201896179U
CN201896179U CN2010206240504U CN201020624050U CN201896179U CN 201896179 U CN201896179 U CN 201896179U CN 2010206240504 U CN2010206240504 U CN 2010206240504U CN 201020624050 U CN201020624050 U CN 201020624050U CN 201896179 U CN201896179 U CN 201896179U
Authority
CN
China
Prior art keywords
gas pipe
roaster
hotblast stove
flame
burner port
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010206240504U
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Chinese (zh)
Inventor
韩宏松
毕传光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Meishan Iron and Steel Co Ltd
Original Assignee
Shanghai Meishan Iron and Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Meishan Iron and Steel Co Ltd filed Critical Shanghai Meishan Iron and Steel Co Ltd
Priority to CN2010206240504U priority Critical patent/CN201896179U/en
Application granted granted Critical
Publication of CN201896179U publication Critical patent/CN201896179U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a roasting device, in particular to a roaster of a blast stove and belongs to the technical field of ironmaking equipment. The roaster is provided with a big-caliber gas pipe which is positioned in the blast stove and provided with an upward outer burning port; a small-caliber gas pipe is inserted in the big-caliber gas pipe; and an inner burning port of the small-caliber gas pipe is positioned in the middle of the outer burning port. The roaster has the obvious advantages of meeting the roasting requirements in different stages, being high in precision of temperature rise, effectively lowering dynamic pressure loss, maintaining stable combustion, preventing the extinguishment of flame, and the like.

Description

The hotblast stove roaster
Technical field
The utility model relates to a kind of apparatus for baking, and especially a kind of hotblast stove roaster belongs to the ironmaking equipment technical field.
Background technology
Silica brick is a kind of tart refractory materials, and its high-temperature behavior is good, and cost is low, has become body of heater material main on the blast funnace hot blast stove now.Because the silica brick expansion characteristics that it had in 100 ℃ to 650 ℃ temperature range especially has transformation temperature at 117 ℃~163 ℃, 220 ℃~275 ℃, 572 ℃.Moisture is taken off to the greatest extent when guaranteeing baker and masonry does not influence the stable of masonry when expanded by heating, temperature-rise period should slowly carry out.In the crystal transition process because of residual quartz in silica brick, the intergranular low temperature phase change can take place, its coefficient of expansion is bigger, and this phase transition process is a reversing process simultaneously.If it is unreasonable to heat up, the thermo-efficiency and the life-span of hotblast stove will be influenced.Singularity on the hot blast demand of blast furnace High Temperature High Pressure and anti-material are selected has proposed new requirement to the baking technology of hotblast stove.
Other producers to silicon brick hot-blast stove baking technology commonly used are both at home and abroad: the interim process furnace of building, several No. 6 or No. 9 burners are installed in stove, and flue gas and a certain amount of freezing air blow in people's hotblast stove from manhole after being mixed into and requiring temperature.After baker finishes, also need interim process furnace is removed.This way.Equipment volume is huge, and the cost height is installed, removed trouble, and the temperature loss of hotblast stove is big, and particularly for the silicon brick hot-blast stove of crystal conversion sensitivity, the furnace technology that disposes interim process furnace is difficult to satisfy the requirement of baking process curve.Many improved methods have been arranged at present, but all existed flame long, made silica brick be subjected to the problem of naked light baking easily.Also useful interim sleeve type burner system toasts, but owing on caliber and burner port structure Design, have defective, be prone to flame-out big in actual applications with gas resistance damage, the flame instability, the intensification precision is difficult to problems such as control, and the problems referred to above are perplexing blast furnace man author dearly.
In sum, traditional hot wind furnace baking method has the following disadvantages:
(1) temperature control precision is poor, is difficult to satisfy the demand of silica brick baking;
(2) relate to the dismounting of extra burner in the bake process, time-consuming;
(3) lattice of anti-the material changes the high-temperature zone temperature drop, impairs the life-span of siliceous anti-material;
(4) flame-out easily in the baker process, flame stability is poor.
Retrieval finds, application number is that 200920011511.8 Chinese patent discloses a kind of blast funnace hot blast stove apparatus for baking, and burning capacity is strong though this device has, the accurate advantage of flow control, and flame stability is still not ideal enough.
The utility model content
The purpose of this utility model is: at the problem that above-mentioned prior art exists, a kind of hotblast stove roaster that can guarantee to toast stable burning under the initial stage low discharge coal gas stream condition, avoid fray-out of flame is proposed,
In order to reach above purpose, hotblast stove roaster of the present utility model comprises having and is positioned at the hotblast stove heavy caliber gas pipe of outer burner port up, the small-bore gas pipe of plug-in mounting in the described heavy caliber gas pipe, the internal combustion mouth of described small-bore gas pipe are positioned at described outer burner port middle part.
The utility model further improves: described inside and outside burner port is the bell mouth shape of latus rectum flaring respectively.
The utility model further improves: the cross section of described inside and outside burner port is major axis and the axial ellipse in the same way of gas pipe.
The utility model further improves again: the port of described inside and outside burner port flow of gas direction in the gas pipe has a down dip.
During use, this device has following main beneficial effect:
1) big and small sheath formula gas pipe structure can satisfy the baking requirement of different steps, and intensification precision height is slow at the low heat-up rate of hotblast stove baking initial stage temperature requirement, selects small-bore gas pipe for use, and the middle and later periods is selected heavy caliber gas pipe air feed for use;
2) the increaser structure of gas-fired mouth effectively reduces the dynamic pressure loss, avoids eddy current to produce, and keeps stable burning;
3) the inclined ellipse Cross section Design of gas-fired mouth can increase the contact surface of coal gas and oxygen, " on take out burning " that can produce simultaneously the local combustion supporting air that is similar to " little chimney " formula acts on, help coal gas and fully contacting of combustion air and in time replenishing of combustion-supporting oxygen, effectively guarantee coal gas stable burning, avoid that the fray-out of flame phenomenon often takes place existing roaster under the little gas flow.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model;
Fig. 2 is that the A-A of Fig. 1 overlooks enlarged view;
Fig. 3 is the structural representation of manhole joint flange among Fig. 1.
Accompanying drawing number: 1. heavy caliber gas pipe; 2. small-bore gas pipe; 3. heavy caliber gas-fired mouth; 4. small-bore gas-fired mouth; 5. flame-out warning thermopair; 6. ever-burning flame burning torch; 7. support; 8. manhole joint flange; 9. small-bore pipeline joint flange; 10. large diameter pipeline joint flange; 11. band slip lid peep hole; 12. camera open holes
Five, embodiment
Present embodiment is a kind of steel tube structure hotblast stove roaster, and as shown in Figure 1, heavy caliber gas pipe 1 is selected the DN300 weldless steel tube for use, has to be positioned at hotblast stove outer burner port 3 up.Small-bore gas pipe 2 is selected the DN80 weldless steel tube for use, is inserted in the heavy caliber gas pipe 1, has the internal combustion mouth 4 that is positioned at outer burner port 3 middle parts.Duct length determines according to the combustion chamber internal diameter of baking hotblast stove, and the center that the position that generally guarantees gas-fired mouth 3,4 approximately is in the combustion chamber gets final product.
The inside and outside burner port 4,3 of gas pipe 1,2 adopts the increaser structure, the bell mouth shape that all is the latus rectum flaring, its cross section is to be axially in the same way ellipse (referring to Fig. 2) of major axis and gas pipe, and the port of inside and outside burner port flow of gas direction in the gas pipe has a down dip.
Heavy caliber gas pipe 1 top is provided with support 7, divides upper and lower two-layer ever-burning flame burning torch 6 and the flame-out warning thermopair 5 installed respectively.Gas pipe 1, flame-out warning thermopair 5, ever-burning flame burning torch 6 are fixed by manhole joint flange 8 and hotblast stove manhole, and band slip lid peep hole 11, camera open holes 12 (referring to Fig. 3) are set on the manhole joint flange 8.Gas line 1,2 is connected with gas pipeline by joint flange 9,10.
Before the baking hotblast stove, roaster is installed on the combustion chamber manhole of hotblast stove, connects with gas conveying tube, the Controlling System Installation and Debugging are good, just can carry out hotblast stove according to the requirement of roast technic curve then and toast.In the bake process, can observe monitoring to the operating mode of burner by the peep hole 11 of band slip lid and the camera that is installed on the manhole flange 8, flame-out simultaneously warning thermopair 5 also provides the fray-out of flame alarm message.
Facts have proved: the roaster of present embodiment has satisfied the baking process requirement of silicon brick hot-blast stove in different steps, intensification precision height, and heating schedule control is effectively simple, avoided fray-out of flame phenomenon under the little gas flow situation, flame is stable, has improved baker efficient, and has had the following advantages:
1) disposes the ever-burning flame burning torch, further prevented fray-out of flame effectively;
2) configuration of flame warning thermopair and monitoring camera has realized the monitoring to the roaster operating mode;
3) installation, dismounting, simple to operation can be reused, and reduce facility investment.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims (5)

1. hotblast stove roaster has and is positioned at the hotblast stove heavy caliber gas pipe of outer burner port up, and it is characterized in that: the small-bore gas pipe of plug-in mounting in the described heavy caliber gas pipe, the internal combustion mouth of described small-bore gas pipe are positioned at described outer burner port middle part.
2. hotblast stove roaster according to claim 1 is characterized in that: described inside and outside burner port is the bell mouth shape of latus rectum flaring respectively.
3. hotblast stove roaster according to claim 2 is characterized in that: the cross section of described inside and outside burner port is major axis and the axial ellipse in the same way of gas pipe.
4. hotblast stove roaster according to claim 3 is characterized in that: the port of described inside and outside burner port flow of gas direction in the gas pipe has a down dip.
5. hotblast stove roaster according to claim 4 is characterized in that: described heavy caliber gas pipe top is provided with support, and described support divides upper and lower two-layer ever-burning flame burning torch and the flame-out warning thermopair installed respectively.
CN2010206240504U 2010-11-25 2010-11-25 Roaster of blast stove Expired - Fee Related CN201896179U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206240504U CN201896179U (en) 2010-11-25 2010-11-25 Roaster of blast stove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206240504U CN201896179U (en) 2010-11-25 2010-11-25 Roaster of blast stove

Publications (1)

Publication Number Publication Date
CN201896179U true CN201896179U (en) 2011-07-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010206240504U Expired - Fee Related CN201896179U (en) 2010-11-25 2010-11-25 Roaster of blast stove

Country Status (1)

Country Link
CN (1) CN201896179U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102679562A (en) * 2012-05-31 2012-09-19 苏州市金翔钛设备有限公司 Hot-blast stove monitoring system
CN103290155A (en) * 2013-06-14 2013-09-11 鞍钢集团工程技术有限公司 Hot blast furnace roaster and furnace roasting method
CN103498015A (en) * 2013-09-17 2014-01-08 鞍山市东盛能源设备有限公司 Roaster device of iron-making hot blast furnace

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102679562A (en) * 2012-05-31 2012-09-19 苏州市金翔钛设备有限公司 Hot-blast stove monitoring system
CN103290155A (en) * 2013-06-14 2013-09-11 鞍钢集团工程技术有限公司 Hot blast furnace roaster and furnace roasting method
CN103498015A (en) * 2013-09-17 2014-01-08 鞍山市东盛能源设备有限公司 Roaster device of iron-making hot blast furnace
CN103498015B (en) * 2013-09-17 2015-06-03 鞍山市东盛能源设备有限公司 Roaster device of iron-making hot blast furnace

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110713

Termination date: 20131125

C17 Cessation of patent right