CN1624159B - Hot-blast stove heating from dual-end of air pipe of heat storage device set - Google Patents
Hot-blast stove heating from dual-end of air pipe of heat storage device set Download PDFInfo
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- CN1624159B CN1624159B CN 200310123604 CN200310123604A CN1624159B CN 1624159 B CN1624159 B CN 1624159B CN 200310123604 CN200310123604 CN 200310123604 CN 200310123604 A CN200310123604 A CN 200310123604A CN 1624159 B CN1624159 B CN 1624159B
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- heat storage
- hotblast stove
- storage group
- air
- regenerator
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 15
- 238000005338 heat storage Methods 0.000 title claims description 89
- 238000002485 combustion reaction Methods 0.000 claims abstract description 51
- 239000003034 coal gas Substances 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 7
- 230000007306 turnover Effects 0.000 claims description 6
- 238000009825 accumulation Methods 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 2
- 230000000737 periodic effect Effects 0.000 claims 1
- 238000010626 work up procedure Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 208000011580 syndromic disease Diseases 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
An air heating furnace features that two combustion chambers arranged at both ends of the air channel for heat accumulator set are alternatively working. It is composed of main body, heat accumulating combustion unit, high-temp valves, reversing system, combustion helping blower, draught fan, chimney, ignitor, air distributing channel, and pipeline. Its advantages are high air temp increased by 100-500 deg.C, and high heat efficiency.
Description
Affiliated technical field
The present invention relates to a kind of hotblast stove that is used for the demand high-temperature gas from the heating of heat storage group air flue two ends.
Following explanation is example with the blast-furnace smelting.
Background technology
Blast-furnace smelting needs the enough high temperature hot blast, and hotblast stove provides the device of this hot blast, and the hotblast stove that current industrial is used is made up of furnace shell, refractory lining, combustion unit, checker brick, fire grate, valve and channel system.Be subjected to the restriction of calorific value of fuel and fuel and combustion air initial temperature, the wind pushing temperature of existing hotblast stove generally about 1000-1200 ℃, can not adapt to new high wind-warm syndrome requirement.What pay particular attention to is under so high temperature, to want to make temperature to improve very difficulty again, but even make temperature improve tens degree, also be very useful to smelting process.The part of not knowing of traditional hot wind furnace is that 1. the heat storage group two ends temperature difference is very big in the stove, and the thermal capacitance ability of heat storage group fails to play one's part to the full, and under the condition of equal heat capacity, volume is big, and investment is high.2. the flue-gas temperature of discharging in the stove is higher, influences the thermo-efficiency of hotblast stove, adopts heat exchanger to come recovery waste heat, and needing increases investment, and effect is undesirable.3. influenced by combustion gas quality bigger for the hot blast temperature upper limit that provides of hotblast stove, when particularly using blast furnace gas, is difficult to adapt to the requirement of high wind-warm syndrome more than 1200 ℃.
Summary of the invention
The object of the present invention is to provide that a kind of wind-warm syndrome is higher, bigger, the easier raising thermo-efficiency of the heat storage capacity of heat storage, safer hotblast stove.
Basic design of the present invention is, respectively establish a combustion chamber at the air flue two ends of hotblast stove heat storage group, the air flue two ends heating from hotblast stove heat storage group makes hot blast temperature higher, hotblast stove heat storage group obtains littler thermograde, to improve the heat storage capacity of heat storage group.
For improving efficiency of combustion and, can use Regenerative Combustion Technology to the Heating temperature of heat storage group, with coal gas with or the combustion air thermal afterburning burn.
Regenerative Combustion Technology can be used regenerator or heat-accumulating burner.
The heat storage group of the hotblast stove under the above-mentioned design can also be to combine by a plurality of relatively independent heat storage group that pipeline and valve system keep communicating in twos, to guarantee normally carrying out of combustion processes.
Can make the passage of coal gas and combustion air parallel with hotblast stove heat storage group gas channel at hotblast stove heat storage group two ends, cold wind and hot-air channel intersect an angle at the sidepiece and the heat storage group gas channel of hotblast stove heat storage group both sides, also can make cold wind parallel with hotblast stove heat storage group gas channel at hotblast stove heat storage group two ends with hot-air channel, the passage of coal gas and combustion air intersects an angle at the sidepiece and the hotblast stove heat storage group gas channel of hotblast stove heat storage group both sides.
On air, for making the hot blast rotation flow pattern uniform, can the cold wind import with or the position of hot-blast outlet ring set is set, a plurality of air ports are set in the ring set.
For improving the distribution of air-flow turnover, can make the cold wind import with or the medullary ray of hot-blast outlet or centrosymmetry face and its radial slit between keep one to make and pass in and out the oblique angle that wind roughly tangentially passes in and out.
Equally, in the burning phase, for making hot blast gas stream in the stove uniform distribution, can coal gas, air intlet and or the position of exhanst gas outlet ring set is set, a plurality of air ports are set in the ring set, make coal gas, air intlet and or the medullary ray of exhanst gas outlet or centrosymmetry face and its radial slit between keep one to make the roughly oblique angle of turnover tangentially of turnover wind.
Be the burning of baker and low-temperature zone, respectively establish a lighter for ignition in heat storage group both sides.
When above-mentioned hotblast stove adopts the structure of horizontal monomer-type, can effectively reduce the hotblast stove height, reduce the creep of bottom heat storage, avoid producing the inconvenience that working aloft brings, make the thermograde in the heat storage group littler.
Beneficial effect
1. under the condition of refractory materials, heat storage material, Controlling System and time permission, even adopt fuel gas with low heat value, hot blast temperature also can reach the required arbitrary temp of technology, thereby realizes the optimization of the maximum of wind-warm syndrome factor in the smelting process.
2. under equal conditions, long than the existing hotblast stove air-supply time.
3. when adopting Regenerative Combustion Technology, the efficient of hotblast stove is higher, can reach the effect of energy-saving and environmental protection.
4. the internal difference in temperature of heat storage group is less in the stove, and the temperature of heat storage is higher, thereby the heat storage capacity of unit heat storage is bigger.
5. when hotblast stove adopts the structure of horizontal monomer-type, can effectively reduce the hotblast stove height, reduce investment; Reduce the creep of bottom heat storage; The equipment installation and maintenance is more convenient; Thermograde in the heat storage group is littler.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing and structure example, 6 pages of drawings attacheds of the present invention, totally 10 width of cloth.
Fig. 1 is from Combustion of Hot Air Furnace phase (right side) system diagram of the air flue two ends heating of hotblast stove heat storage group
Fig. 2 is from Combustion of Hot Air Furnace phase (left side) system diagram of the air flue two ends heating of hotblast stove heat storage group
The hotblast stove that Fig. 3 heats from the air flue two ends of hotblast stove heat storage group is system diagram on air
Fig. 4 regenerator decomposing schematic representation
Fig. 5 coal gas, air are at the pipeline synoptic diagram that burns
The whole connection diagram of Fig. 6 hotblast stove and regenerator
The another kind of heat storage group of Fig. 7 is arranged synoptic diagram
Fig. 8 A-A diagrammatic cross-section
Fig. 9 B-B diagrammatic cross-section
Figure 10 implements two synoptic diagram
Code name is among the figure:
1. regenerator 2. coal gas heat storages 3. air heat storages 4. high temperature valves
5 air burners, 6. coal gas burners, 7. hotblast stove bodies, 8. hot-blast outlet ring sets
9. combustion chamber 10. hotblast stove heat accumulating sections 11. combustion chambers
12. cold wind import ring set 13. exchange systems 14. burner blowers
15. induced draft fan 16. chimneys 17. lighter for ignitions
As Fig. 1-3, be the system diagram of embodiments of the invention one, displaying be the situation that hotblast stove adopts horizontal monomer-type.Form by hotblast stove body 7, regenerator 1, air burner 5, coal gas burner 6, hot-blast outlet ring set 8, cold wind import ring set 12, high temperature valve 4, exchange system 13, burner blower 14, induced draft fan 15, chimney 16, lighter for ignition 17 from the hotblast stove that heat at the air flue two ends of hotblast stove heat storage group.Wherein hotblast stove body 7 is made up of combustion chamber 9, hotblast stove heat accumulating sections heat storage group 10, combustion chamber 11.
The hotblast stove body can be horizontal steel cylinders 7, and inner lining refractory is divided into combustion chamber 9, hotblast stove heat accumulating sections 10, combustion chamber 11 on length, and heat accumulating sections is filled heat storage group 10, and the combustion chamber is the space of air, gas-fired.
As Fig. 1, establish many group regenerator or heat-accumulating burner at the two ends of body, in the burning phase, coal gas, air is through the regenerator 1 of combustion chamber 11 sides, high temperature valve 4,. coal gas burner 6, air, when burner 5 or heat-accumulating burner burning, the high-temperature flue gas that produces, heat storage group 10 through heat accumulating sections, then through the coal gas burner 6 of combustion chamber 9 sides, air burner 5, high temperature valve 4, regenerator 1 or heat-accumulating burner, behind the coal gas heat storage 2 in the regenerator 1 of heating flame chamber 9 sides and the heat storage of air heat storage 3 or heat-accumulating burner, through valve, piping system, exchange system, induced draft fan enters chimney.
As Fig. 2, in the burning phase, behind the 30-200s, the exchange system commutation, coal gas, air is through the regenerator 1 of combustion chamber 9 sides, high temperature valve 4, coal gas burner 6, when air burner 5 or heat-accumulating burner burning, the high-temperature flue gas that produces, heat storage group 10 through heat accumulating sections, then through the coal gas burner 6 of combustion chamber 11 sides, air burner 5, high temperature valve 4, regenerator 1 or heat-accumulating burner, behind the coal gas heat storage 2 in the regenerator 1 of heating flame chamber 11 sides and the heat storage of air heat storage 3 or heat-accumulating burner, through valve, piping system, exchange system, induced draft fan enters chimney.
As Fig. 3, on air, close the high temperature valve 4 at hotblast stove body two ends, after all pressing, open the valve of cold wind and hot blast, cold wind is through cold wind import ring set 12, enters after hotblast stove and heat storage group carry out heat exchange, enters the hot-blast main from hot-blast outlet ring set 8.
According to certain rule and program hotblast stove both sides regenerator or heat-accumulating burner alternation.
About 530 ℃ of the point of ignition of blast furnace gas, working control is greater than 600 ℃.The hotblast stove initial stage of heating from the air flue two ends of hotblast stove heat storage group, flue-gas temperature was low, by lighter for ignition 17 hotblast stove is dried by the fire to greater than 600 ℃, starts regenerator or heat-accumulating burner then when working.Therefore, heat-accumulating burner is not all to be in real working order in the complete period, and the temperature of a combuster 9,11 reached greater than the cycle after 600 ℃, just really worked.Press the hotblast stove operating mode, in the following several ways:
1) the hotblast stove stove builds up the initial stage, and hotblast stove is in " cold " state, and regenerator or heat-accumulating burner can't be worked, and carries out baker by the lighter for ignition 17 that is arranged on combustion chamber 9,11 sides.Use the lighter for ignition baker of combustion chamber 9 sides earlier, the lighter for ignition 17 of combustion chamber 9,11 sides baker in turn then, the beginning flue-gas temperature is lower, the regenerator temperature of regenerator or heat-accumulating burner is lower, when thermopair records side combusion chamber's temperature greater than 600 ℃, reach the point of ignition of air, coal gas, air, coal gas insert the regenerator or the heat-accumulating burner of this side, start working, simultaneously, detect the temperature of opposite side combustion chamber, when also reaching greater than 600 ℃, the exchange system commutation, air, coal gas insert the regenerator or the heat-accumulating burner of opposite side, start working.At this moment regenerator or heat-accumulating burner enter real working order, and arrests firearm 17 carries out baker by drying out curve, finishes up to baker.Because heat accumulating sections is in the middle part, when baker finished, the temperature of combustion chamber all reached 1300--1500 ℃, has created condition for hotblast stove puts into operation.
2) after baker finished, the temperature of combustion chamber all reached 1300--1500 ℃, and hotblast stove is in stewing stove state.Before dropping into burning, thermopair records both sides burning zone temperature, reaches 600 ℃, can carry out work by Control Program for Microcomputers [Digital Research] or director demon.
3) hotblast stove is after on air finishing, the about 1000--1500 of the temperature of hot-blast outlet side combusion chamber ℃, the cold wind on the suction side burns the about 300--500 of temperature ℃ that is, the temperature of hot-blast outlet side combusion chamber satisfies the condition of gas-fired, earlier send into coal gas and air from the regenerator or the heat-accumulating burner of hot-blast outlet side combusion chamber, burn, the regenerator or the heat-accumulating burner of cold wind on the suction side combustion chamber are in the accumulation of heat state.
When the temperature of cold wind on the suction side combustion chamber greater than 600 ℃, the exchange system commutation, the regenerator or the heat-accumulating burner of cold wind on the suction side combustion chamber begin to add heating gas, air, burn, and the regenerator of hot-blast outlet side combusion chamber or heat-accumulating burner are in the accumulation of heat state.Regenerator or heat-accumulating burner carry out work by Control Program for Microcomputers [Digital Research] or director demon, reach 1300--1500 ℃ up to the both sides chamber temperature.
Every group of regenerator or heat-accumulating burner can be divided into the two portions that are used for different purposes, or be decomposed into two groups of regenerator or heat-accumulating burners that are used for different purposes as Fig. 4, or send into hotblast stove in the pipeline internal combustion, or be linked to be integral body as Fig. 6 regenerator or heat-accumulating burner and hotblast stove as Fig. 5.
Fig. 7 is among the embodiment one, the arrangement form of another kind of heat storage group, and it is to be combined by a plurality of relatively independent heat storage group that keeps communicating in twos by pipeline and valve system.Among the figure, the 10th, a plurality of relatively independent heat storage groups, switch combination and pipeline by each valve can keep communicating in twos of they.
Fig. 8 is the sectional view of the A-A among Fig. 1, and what its was represented is a kind of structure when in the ring set 12 of sending into cold wind a plurality of blast inlet being set.
Fig. 9 is the sectional view of the B-B among Fig. 1, and what its was represented is a kind of structure when in the ring set 8 of deriving hot blast a plurality of air outlet being set.
If one or two (the using and the reserved) burner blowers 14 provide combustion air, its pressure will satisfy heat-accumulation combustion, is 5-15Kpa.
As a complete hot blast stove system, should constitute by two hotblast stoves shown in the present embodiment at least, consider situations such as maintenance, preferably adopt three hotblast stoves shown in the present embodiment to constitute a complete hot blast stove system.
Figure 10 is the structure iron that the present invention has adopted the embodiment two of a plurality of relatively independent heat storage group that communicates in twos by pipeline and valve system maintenance, and in order to simplify, refractory lining does not draw among the figure.The implication of each label among the figure is identical with the implication of label among Fig. 1-3.Be not difficult to find out that from figure in the present embodiment, on the one hand, the open and close combination by each valve can be heated in twos to each relatively independent heat storage group 10, and make the relatively independent heat storage group of finishing after the heating enter the exothermic phase of air-supply one by one; On the other hand, open and close by related valve cooperate, when any one relatively independent heat storage group is in ventilation state, all the other two relatively independent heat storage groups that are ready are heated, unless have one to belong to high temperature and await orders in two relatively independent heat storage groups of all the other that are ready, temporarily do not need heating.
No matter embodiment one still is embodiment two, can set up a plurality of combustion air inlet 6 and gas entry 5 and blow ring set 12, air-out ring sets 8 that are sent to blast furnace on furnace shell, and the section form of this ring set can also be semicircular or other shapes.
Claims (10)
1. hotblast stove from the heating of the air flue two ends of hotblast stove heat storage group, it is by the hotblast stove body, regenerator, high temperature valve, exchange system, burner blower, induced draft fan, chimney, lighter for ignition, cold wind hot blast or coal gas even air distributing ring row of channels, valve and piping system are formed, wherein the hotblast stove body comprises furnace shell, refractory lining, the combustion chamber, the heat storage group, it is characterized in that, respectively establish a combustion chamber at the air flue two ends of hotblast stove heat storage group, periodic work by combustion chamber, air flue two ends, realization makes whole hotblast stove heat storage group uniformity of temperature profile unanimity to the heating of hotblast stove heat storage group.
2. the hotblast stove that heats from the air flue two ends of hotblast stove heat storage group as claimed in claim 1 is characterized in that, the heat storage group of hotblast stove is to combine by a plurality of relatively independent heat storage group that pipeline and valve system keep communicating in twos.
3. the hotblast stove that heats from the air flue two ends of hotblast stove heat storage group as claimed in claim 1, it is characterized in that, regenerator is at least two groups, be positioned at the both sides or the outside of combustion chamber, two ends, every group of regenerator is divided into the two portions that are used for different purposes or is decomposed into two groups of regenerator that are used for different purposes.
4. the hotblast stove that heats from the air flue two ends of hotblast stove heat storage group as claimed in claim 1, it is characterized in that, make the passage of coal gas and combustion air parallel with hotblast stove heat storage group gas channel at hotblast stove heat storage group two ends, cold wind and hot-air channel intersect an angle at the sidepiece and the heat storage group gas channel of hotblast stove heat storage group both sides; Perhaps, make cold wind parallel with hotblast stove heat storage group gas channel at hotblast stove heat storage group two ends with hot-air channel, the passage of coal gas and combustion air intersects an angle at the sidepiece and the hotblast stove heat storage group gas channel of hotblast stove heat storage group both sides.
5. the hotblast stove that heats from the air flue two ends of hotblast stove heat storage group as claimed in claim 1, it is characterized in that, on air, for making hot blast gas stream in the stove uniform distribution, position at cold wind import and hot-blast outlet is provided with ring set, a plurality of air ports are set in the ring set, make and keep to make the roughly oblique angle of turnover tangentially of turnover wind between the medullary ray of cold wind import and/or hot-blast outlet or centrosymmetry face and its radial slit, equally, in the burning phase, for making hot blast gas stream in the stove uniform distribution, at coal gas, the position of air intlet and exhanst gas outlet is provided with ring set, a plurality of air ports are set in the ring set, make coal gas, keep an oblique angle that turnover wind is roughly tangentially passed in and out between the medullary ray of air intlet and/or exhanst gas outlet or centrosymmetry face and its radial slit.
6. the hotblast stove that heats from the air flue two ends of hotblast stove heat storage group as claimed in claim 1, it is characterized in that, for baker with do not possess the burning of the low-temperature zone of working conditions in regenerator, respectively establish a lighter for ignition in heat storage group both sides, the assurance regenerator can be devoted oneself to work up to creating conditions, after regenerator was devoted oneself to work, lighter for ignition quit work, lighter for ignition burning coke-oven gas.
7. the hotblast stove that heats from the air flue two ends of hotblast stove heat storage group as claimed in claim 1, it is characterized in that, the hotblast stove body is a steel cylinders, inner lining refractory, on length, be divided into combustion chamber (1), heat accumulating sections, combustion chamber (2), heat accumulating sections is filled the heat storage group, and the heat accumulating sections heat storage is a siliceous refractory [material, and structure is honeycomb, spheroid, 7 hole checker brick or 19 hole checker brick.
8. the hotblast stove that heats from the air flue two ends of hotblast stove heat storage group as claimed in claim 1 is characterized in that the heat storage of regenerator is a siliceous refractory [material, and structure is honeycomb or spheroid.
9. the hotblast stove that heats from the air flue two ends of hotblast stove heat storage group as claimed in claim 1 is characterized in that exchange system is reversing mechanism or independent valve group, simultaneously, establishes a high temperature, high pressure valve between hotblast stove body combustion chamber and regenerator.
10. the hotblast stove that heats from the air flue two ends of hotblast stove heat storage group as claimed in claim 1 is characterized in that, establishes one or two burner blowers, and combustion air is provided, and its pressure will satisfy heat-accumulation combustion, is 5-15Kpa; Establish one or two induced draft fans and chimney after the exchange system, the discharging flue gas, flue-gas temperature is less than 200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310123604 CN1624159B (en) | 2003-12-05 | 2003-12-05 | Hot-blast stove heating from dual-end of air pipe of heat storage device set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310123604 CN1624159B (en) | 2003-12-05 | 2003-12-05 | Hot-blast stove heating from dual-end of air pipe of heat storage device set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1624159A CN1624159A (en) | 2005-06-08 |
| CN1624159B true CN1624159B (en) | 2010-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310123604 Expired - Lifetime CN1624159B (en) | 2003-12-05 | 2003-12-05 | Hot-blast stove heating from dual-end of air pipe of heat storage device set |
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| CN (1) | CN1624159B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566389A (en) * | 2008-04-24 | 2009-10-28 | 沈阳东方钢铁有限公司 | Horizontal-type high temperature hot-blast furnace |
| CN101643807B (en) * | 2009-09-15 | 2011-06-15 | 贾会平 | Melting and iron-smelting device of heat storage type electric arc furnace |
| CN102116579B (en) * | 2009-12-30 | 2012-09-26 | 中冶长天国际工程有限责任公司 | Burning pipeline system for rotary hearth furnace |
| CN102146490B (en) * | 2010-02-09 | 2012-11-28 | 贾会平 | Reduction iron making method and device |
| CN105276982B (en) * | 2015-11-02 | 2018-04-10 | 保定安保能冶金设备有限公司 | A kind of heat accumulating type aluminium liquid furnace temperature control device |
| CN106895420A (en) * | 2017-04-10 | 2017-06-27 | 杨峥雄 | One kind circulation regenerative combustion furnace（RTO）Stewing stove method and apparatus |
| CN110425738A (en) * | 2019-07-17 | 2019-11-08 | 柳一曼 | A kind of energy-storage type industrial air heater |
| CN113587696B (en) * | 2021-08-09 | 2023-05-09 | 湖南顶立科技有限公司 | Thermal shock resistant heat storage system in cold air flow scouring environment and heating control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2041690U (en) * | 1988-07-21 | 1989-07-26 | 张旺才 | Self-preheating internal centre burning hot-blast stove |
| CN2705465Y (en) * | 2003-12-05 | 2005-06-22 | 山东省冶金设计院 | Hot-air furnace heated from air path two ends of hot-air furnace heat storage group |
-
2003
- 2003-12-05 CN CN 200310123604 patent/CN1624159B/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2041690U (en) * | 1988-07-21 | 1989-07-26 | 张旺才 | Self-preheating internal centre burning hot-blast stove |
| CN2705465Y (en) * | 2003-12-05 | 2005-06-22 | 山东省冶金设计院 | Hot-air furnace heated from air path two ends of hot-air furnace heat storage group |
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| CN1624159A (en) | 2005-06-08 |
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Owner name: SHANDONG PROVINCE METALLURGICAL ENGINEERING CO., L Free format text: FORMER NAME: SHANGDONG DESIGN INST OF METALLURGY |
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Address after: 250101 Shandong province Ji'nan High-tech Development Zone, Road No. 1969 Patentee after: SHANDONG PROVINCE METALLURGICAL ENGINEERING Co.,Ltd. Address before: 250014 Ji'nan, Lixia District, Shandong Lixia Road, No. 134 Patentee before: Shandong Metallurgical Design Institute |
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