CN102207354A - Novel energy-saving combustion device based on tunnel kiln reducing process - Google Patents
Novel energy-saving combustion device based on tunnel kiln reducing process Download PDFInfo
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- CN102207354A CN102207354A CN2011101691643A CN201110169164A CN102207354A CN 102207354 A CN102207354 A CN 102207354A CN 2011101691643 A CN2011101691643 A CN 2011101691643A CN 201110169164 A CN201110169164 A CN 201110169164A CN 102207354 A CN102207354 A CN 102207354A
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Abstract
The invention is applicable to the field of novel energy-saving heat-supply combustors used for a tunnel kiln (or a similar kiln body) and filled with solid powder fuels. The invention discloses a novel energy-saving combustion device based on a tunnel kiln reducing process; a plurality of pairs of automatic feeding devices are arranged on the top of a tunnel kiln every 1 meters, wherein each automatic feeding device comprises a feed bin and a conveyor connected with the feed bin, one end of the conveyor is connected with a motor through a connector, and the other end of the conveyor is connected with a combustor through a discharging chute. When the novel energy-saving combustion device works, the motor controls the conveyor to convey the material in the feed bin into the combustor trough the discharge chute, the air-fuel ratio is set as 1.1 to 1.2, and the pressure inside the kiln is 0 to 50 Pa. Compared with the prior art, the novel energy-saving combustion device ensures that the temperature inside the kiln is distributed more uniformly and heat is supplied more stably because the air-fuel ratio is 1.1 to 1.2 and the pressure inside the kiln is 0 to 50 Pa, and only 150 to 170 kg/t of standard fuel is needed when the novel energy-saving combustion device generates certain amount of heat, while 450 to 550 kg/t standard fuel is needed in the traditional process.
Description
Technical field
The present invention relates to metallurgical technology field, particularly a kind of novel energy-conserving heat supply burner that relates to tunnel cave (or close kiln body) adding solid, powdery fuel.
Background technology
DRI (DRI) is that iron ore directly is reduced to iron under solid conditions, can be used as the pure raw material of smelting high-quality steel, special steel, also can be used as the iron-bearing material of technologies such as casting, ferroalloy, powder metallurgy.This technology is that raw material so be a kind of high-quality, low consumption, oligosaprobic ironmaking abbreviated system, also is one of cutting edge technology of whole world Ferrous Metallurgy also without sintering deposit without coke ironmaking.
The mode of production of China's sponge iron mainly is that adopting process is stablized coal-based tunnel furnace method, and China's tunnel cave of having built up or having built has more than 200, design year production capacity surpass 4,000,000 tons, DRI tunnel cave construction upsurge is growing on and on so far.But determined all that from plant layout, floor space, the automatic degree of equipment, labour intensity and environment, supplies consumption index etc. this explained hereafter cost is very high, yielded poorly, finally caused the benefit of factory very poor.Mention in " 12 " steel industry research and development focus technology project: the transformation of tunnel kiln direct reduced technology, perfect, research and development and use, emphasis is the technological transformation that cuts down the consumption of energy, reduces pollution.
The heating system of present tunnel kiln reduction sponge iron, adopt gas generator (or piped gas) heating system mostly, its heat supply just reaches 450～550kg/t (DRI) with the mark coal, especially adopts the gas generator heating system, need self to add the heat loss fire coal because of producing coal gas, energy consumption is higher.Therefore how to reduce tunnel cave heating system energy consumption, reduce a kind of important topic that the sponge iron production cost becomes this technical development.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of novel energy-conserving burner based on tunnel kiln reduction technology, this novel energy-conserving burner can avoid the traditional handicraft gas generator is used for the heating system of tunnel kiln reduction sponge iron, the efficiency of utilization that produces is low, cost is high, be subjected to regional condition to limit, have problems such as potential safety hazard simultaneously, improve the utilization efficiency of heat energy of coal gas, reduce production costs.
In order to solve the problems of the technologies described above, the invention provides a kind of novel energy-conserving burner based on tunnel kiln reduction technology, this novel energy-conserving burner is included in tunnel cave and pushes up every interval 1m and evenly be provided with a pair of autofeed device, wherein should comprise feed bin and the conveyer that is connected with this feed bin to drawing mechanism automatically, this conveyer one end is connected with motor by connector, and the other end is connected with burner by blow tank; By the Electric Machine Control conveyer material in the feed bin is sent in the burner by blow tank during work, making air-fuel ratio is 1.1-1.2, makes to be the 0-50Pa malleation in the kiln.
Say that further described air-fuel ratio is 1.15.
Say that further described burner is provided with the hopper that cooperates with blow tank.
Say further, be provided with the helical form airduct in the porch of described burner.
Say that further described conveyer is an auger conveyor.
Say that further described motor is a variable-frequency motor.
Say further, between described motor and connector, be provided with speed regulator.
Say further, on described helical form airduct, be provided with air preheater.
Say further, in described feed bin, be provided with screen pack.
A kind of novel energy-conserving burner of the present invention based on tunnel kiln reduction technology, evenly be provided with a pair of autofeed device by push up every interval 1m at tunnel cave, wherein should comprise feed bin and the conveyer that is connected with this feed bin to drawing mechanism automatically, this conveyer one end is connected with motor by connector, and the other end is connected with burner by blow tank; By the Electric Machine Control conveyer material in the feed bin is sent in the burner by blow tank during work, making air-fuel ratio is 1.1-1.2, is the 0-50Pa malleation in the kiln.Compared with prior art, because air-fuel ratio is 1.1-1.2, be the 0-50Pa malleation in the kiln, make that the Temperature Distribution in the kiln is more even, heat supply is more stable.According to creation data, this energy-saving combustion apparatus only need to mark coal 150～170Kg/t, and traditional handicraft need be marked coal 450～550kg/t when producing suitable heat simultaneously, and energy consumption is low; Heat supply is fully stable, and is safe; Technology is easy, simple to operate, easy to maintenance.This energy burner is lighted a fire or is stopped kiln conveniently, more saves use cost.
Description of drawings
Fig. 1 is the novel energy-conserving burner example structure schematic diagram that the present invention is based on tunnel kiln reduction technology.
Below in conjunction with embodiment, and with reference to accompanying drawing, realization, functional characteristics and the advantage of the object of the invention is described further.
The specific embodiment
As shown in Figure 1, the present invention is based on the novel energy-conserving burner EXAMPLE Example of tunnel kiln reduction technology.
This novel energy-conserving burner is included in tunnel cave and pushes up every interval 1m and evenly be provided with a pair of autofeed device, wherein should comprise feed bin 2 and the conveyer 10 that is connected with this feed bin 2 to drawing mechanism automatically, these conveyer 10 1 ends are connected with motor 4 by connector 12, and the other end is connected with burner 8 by blow tank 6; By motor 4 control conveyers 10 material in the feed bin 2 is sent in the burner 8 by blow tank 6 during work, making air-fuel ratio is 1.1-1.2, make and be the 0-50Pa malleation in the kiln, preferably, described air-fuel ratio is 1.15, and described conveyer 10 can adopt auger conveyor, for example adopts the shaftless auger conveyor, like this auger conveyor light weight, the friction little, energy-saving convenient; Described motor 4 adopts variable-frequency motor; This connector 12 can adopt joint coupling, maintenance for convenience detach.
Compared with prior art, because air-fuel ratio is 1.1-1.2, be the 0-50Pa malleation in the kiln, make that the Temperature Distribution in the kiln is more even, heat supply is more stable.According to experimental data, this energy-saving combustion apparatus only need to mark coal 150～170Kg/t, and traditional handicraft need be marked coal 450～550kg/t when producing suitable heat simultaneously, and energy consumption is low; Heat supply is fully stable, and is safe; Technology is easy, simple to operate, easy to maintenance.This energy burner is lighted a fire or is stopped kiln conveniently, more saves use cost.
In the present embodiment, described burner 8 is provided with the hopper 11 that cooperates with blow tank 6, and this hopper 11 can better make material go into to work hard in the burner 8.Be provided with helical form airduct 7 in the porch of described burner 8, it can blast combustion air, makes the material burning more abundant, preferably is provided with the air preheater that utilizes waste heat on helical form airduct 7, improves the temperature that blasts air, and then easier burning.
Be provided with speed regulator 3 between described motor 4 and connector 12, this speed regulator 3 can be regulated the transporting velocity of conveyer 10, convenient controlling to input material.Be provided with screen pack 9 in described feed bin 2, oarse-grained material filtering is fallen, improve efficiency of combustion, preferred employing can be filtered 80 purpose coal dusts.
Feed bin lid 1 can also be on feed bin 2, be provided with as required, the dusty fuel airborne dust can be prevented.Described feed bin 2 can be set to liftoff unsettled, helps with kiln top heat insulationly, reduces heat loss.
The above only is the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (9)
1. novel energy-conserving burner is characterized in that:
Being included in tunnel cave pushes up every interval 1m and evenly is provided with a pair of autofeed device, wherein should comprise feed bin and the conveyer that is connected with this feed bin to drawing mechanism automatically, this conveyer one end is connected with motor by connector, and the other end is connected with burner by blow tank; By the Electric Machine Control conveyer material in the feed bin is sent in the burner by blow tank during work, making air-fuel ratio is 1.1-1.2, makes to be the 0-50Pa malleation in the kiln.
2. novel energy-conserving burner according to claim 1 is characterized in that:
Described air-fuel ratio is 1.15.
3. novel energy-conserving burner according to claim 1 is characterized in that:
Described burner is provided with the hopper that cooperates with blow tank.
4. novel energy-conserving burner according to claim 1 is characterized in that:
Be provided with the helical form airduct in the porch of described burner.
5. novel energy-conserving burner according to claim 1 is characterized in that:
Described conveyer is an auger conveyor.
6. novel energy-conserving burner according to claim 1 is characterized in that:
Described motor is a variable-frequency motor.
7. novel energy-conserving burner according to claim 1 is characterized in that:
Between described motor and connector, be provided with speed regulator.
8. novel energy-conserving burner according to claim 1 is characterized in that:
On described helical form airduct, be provided with air preheater.
9. novel energy-conserving burner according to claim 1 is characterized in that:
In described feed bin, be provided with screen pack.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101691643A CN102207354A (en) | 2011-06-22 | 2011-06-22 | Novel energy-saving combustion device based on tunnel kiln reducing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101691643A CN102207354A (en) | 2011-06-22 | 2011-06-22 | Novel energy-saving combustion device based on tunnel kiln reducing process |
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| CN102207354A true CN102207354A (en) | 2011-10-05 |
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| CN2011101691643A Pending CN102207354A (en) | 2011-06-22 | 2011-06-22 | Novel energy-saving combustion device based on tunnel kiln reducing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563986A (en) * | 2013-10-25 | 2015-04-29 | 王建军 | Automatic adding device for drilling fluid powder drugs |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1193396B (en) * | 1981-09-07 | 1988-06-15 | Siderurgie Fse Inst Rech | PROCEDURE FOR FEEDING ENERGY TO A HEATING OVEN OF METALLURGICAL PRODUCTS |
| CN2103739U (en) * | 1991-01-16 | 1992-05-06 | 哈尔滨普华煤燃烧技术开发中心 | Self-balance two-stage powder supply device |
| JPH0790336A (en) * | 1991-12-27 | 1995-04-04 | Kawasaki Steel Corp | Method for controlling combustion of tunnel furnace for sponge iron |
| CN2245202Y (en) * | 1995-01-14 | 1997-01-15 | 李晓明 | Coal dust spray burning flame-isolated tunnel furnace for ceramic industry |
| JP2003279255A (en) * | 2002-03-22 | 2003-10-02 | Nippon Steel Corp | Rotary hearth furnace and operation method for it |
| JP2005300068A (en) * | 2004-04-14 | 2005-10-27 | Nippon Steel Corp | Method for control of oxygen concentration and temperature of exhaust gas from rotary hearth reducing furnace |
| US20100107818A1 (en) * | 2006-07-26 | 2010-05-06 | Nu-Iron Technology, Llc | System and method for producing metallic iron nodules |
-
2011
- 2011-06-22 CN CN2011101691643A patent/CN102207354A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1193396B (en) * | 1981-09-07 | 1988-06-15 | Siderurgie Fse Inst Rech | PROCEDURE FOR FEEDING ENERGY TO A HEATING OVEN OF METALLURGICAL PRODUCTS |
| CN2103739U (en) * | 1991-01-16 | 1992-05-06 | 哈尔滨普华煤燃烧技术开发中心 | Self-balance two-stage powder supply device |
| JPH0790336A (en) * | 1991-12-27 | 1995-04-04 | Kawasaki Steel Corp | Method for controlling combustion of tunnel furnace for sponge iron |
| CN2245202Y (en) * | 1995-01-14 | 1997-01-15 | 李晓明 | Coal dust spray burning flame-isolated tunnel furnace for ceramic industry |
| JP2003279255A (en) * | 2002-03-22 | 2003-10-02 | Nippon Steel Corp | Rotary hearth furnace and operation method for it |
| JP2005300068A (en) * | 2004-04-14 | 2005-10-27 | Nippon Steel Corp | Method for control of oxygen concentration and temperature of exhaust gas from rotary hearth reducing furnace |
| US20100107818A1 (en) * | 2006-07-26 | 2010-05-06 | Nu-Iron Technology, Llc | System and method for producing metallic iron nodules |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563986A (en) * | 2013-10-25 | 2015-04-29 | 王建军 | Automatic adding device for drilling fluid powder drugs |
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Application publication date: 20111005 |