CN108315025A - A kind of carbonization chamber upper space temperature regulation structure and adjusting method - Google Patents
A kind of carbonization chamber upper space temperature regulation structure and adjusting method Download PDFInfo
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- CN108315025A CN108315025A CN201810296300.7A CN201810296300A CN108315025A CN 108315025 A CN108315025 A CN 108315025A CN 201810296300 A CN201810296300 A CN 201810296300A CN 108315025 A CN108315025 A CN 108315025A
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- flue
- hole
- carbonization chamber
- upper space
- space temperature
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- 238000003763 carbonization Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000010410 layer Substances 0.000 claims abstract description 67
- 239000011449 brick Substances 0.000 claims abstract description 35
- 239000000571 coke Substances 0.000 claims abstract description 31
- 238000002485 combustion reaction Methods 0.000 claims abstract description 26
- 238000005192 partition Methods 0.000 claims abstract description 17
- 239000011148 porous material Substances 0.000 claims abstract description 16
- 239000011229 interlayer Substances 0.000 claims abstract description 13
- 206010022000 influenza Diseases 0.000 claims abstract description 7
- 238000004939 coking Methods 0.000 claims description 17
- 239000003034 coal gas Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 239000004484 Briquette Substances 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 239000003570 air Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The present invention relates to a kind of carbonization chamber upper space temperature regulation structure and adjusting method, carbonization chamber and the burning interventricular septum setting of coke oven, combustion chamber is made of multiple flues, and peephole is set above each flue；Flue is duplex flue, is separated by flue partition between each group duplex flue, 2 flues of every group of duplex flue are separated by duplex flue partition；The top of duplex flue sets upper layer and crosses over hole across hole and lower layer respectively, and upper and lower two layers of leap sets interlayer between hole；The interlayer laterally elongated setting in duplex flue, both ends are separately connected the flue partition of both sides；Intercommunicating pore is opened up respectively on interlayer immediately below 2 flue peepholes；Upper layer, which is crossed over, is equipped with air flow regulator in the horizontal gas flow channel in hole.The present invention can it is convenient, fast, accurately adjust carbonization chamber upper space temperature；And adjusting brick is blocked in the horizontal channel that gas flows, and is not influenced through peephole to flue thermometric.
Description
Technical field
The present invention relates to coke oven technical field more particularly to a kind of carbonization chamber upper space temperature regulation structure and adjusting sides
Method.
Background technology
Significant dimensions parameter when coke furnace carbonization chamber upper space temperature is coke oven construction design.On coke furnace carbonization chamber
Portion's space temperature is excessively high, is unfavorable for the quality and yield of raisingization product, can also increase roof carbon generation, it is normal to influence coke oven
Production operation；Coke furnace carbonization chamber upper space temperature crosses bottom, can reduce top charge of coke temperature, influences charge of coke uniformly ripening up and down,
Influence the quality and yield of coke.
Currently, the carbonization chamber upper space temperature of most of coke oven easily can not be adjusted directly, actual production
It can only change carbonization chamber upper space temperature by adjusting combustion chamber fire path temperature or adjustment carbonization chamber coal capacity in journey, but
It is to adjust combustion chamber fire path temperature to may result in high-temp combustion accident, increase NO_x formation, adjusts carbonization chamber coal capacity
Coke output can be influenced, two methods have drawback.
Design and develop 7.63 meters top dress coke ovens of German Wood Company, combustion chamber flue top is upper across pore structure point,
It lower 2 layers, covers two layers by mill brick and realizes that carbonization chamber upper space temperature is adjusted across hole intermediate channel.But cover mill brick
Afterwards, flue (while being also temperature measured hole) has just been covered, has led to not carry out flue temperature measurement, seriously affects coke oven
Production run operates；In addition, upper layer cannot accurately be adjusted across hole by tolerance by being adjusted using mill brick, section easily causes charing
Room upper space temperature is excessively high, the quality and yield of influence product.
Invention content
The present invention provides a kind of carbonization chamber upper space temperature regulation structure and adjusting methods, can be convenient, fast, smart
Carbonization chamber upper space temperature is adjusted accurately；And adjusting brick is blocked in the horizontal channel that gas flows, and does not influence to lead to
Peephole is crossed to flue thermometric.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of carbonization chamber upper space temperature regulation structure, the carbonization chamber of coke oven and burning interventricular septum setting, combustion chamber by
Multiple flues form, and peephole is set above each flue；Flue is duplex flue, between each group duplex flue
Separated by flue partition, 2 flues of every group of duplex flue are separated by duplex flue partition；Duplex flue
Top sets upper layer and crosses over hole across hole and lower layer respectively, and upper and lower two layers of leap sets interlayer between hole；The interlayer is in the vertical fire of duplex
Laterally elongated setting in road, both ends are separately connected the flue partition of both sides；On interlayer immediately below 2 flue peepholes
Intercommunicating pore is opened up respectively；Upper layer, which is crossed over, is equipped with air flow regulator in the horizontal gas flow channel in hole.
The width in the upper layer across hole is equal with the width of duplex flue；The air flow regulator include wall and
Adjusting brick；Upper layer is crossed in hole, and wall is equipped between 2 intercommunicating pores and at the intercommunicating pore of side, adjusting is opened up on wall
Hole, adjusting brick is movably equipped at adjustment hole, and adjusting brick can partly or entirely close adjustment hole.
The adjustment hole sets 1 to multiple.
The adjusting brick can drive lower edge to adjust hole horizontal sliding in the hitcher stretched into from peephole.
The lower layer is set to across hole on duplex flue partition.
The apical side height in the upper layer across hole is coaling line height less than carbonization chamber.
A kind of carbonization chamber upper space temperature control method of the carbonization chamber upper space temperature regulation structure, including：
1) according to carbonization chamber coal capacity, briquette degree of shrinkage, flue ignition temperature, and consider top dress coke making process
And/or the requirement of tamping coking technique, the bilayer at the top of the duplex flue of designed combustion room cross over pore structure；Target is：It is closing
It closes layer to cross under conditions of hole, 2/3 coking cycles moment, the carbonization chamber upper space temperature of coke oven is less than 850 DEG C；
2) in the normal productive process after coke oven is gone into operation, upper layer is closed across hole；At this point, coal gas, air exist
The exhaust gas of flue lower combustion, generation of burning rises at the top of flue, enters across hole with down current through lower layer
Flue；
3) after coke oven production state adjusts, the carbonization chamber upper space temperature at 2/3 coking cycles moment is less than 800 DEG C
When, hitcher is stretched by furnace roof top peephole in the combustion chamber flue adjacent with carbonization chamber, slidable adjustment brick opening pair
The adjustment hole answered；
When adjustment hole is equipped with it is multiple when, an adjustment hole is first opened, on the carbonization chamber for remeasuring for 2/3 coking cycles moment
If portion's space temperature increases open adjusting hole number still without desired temperature is reached, repeatedly, until carbonization chamber
Upper space temperature reaches required temperature；
After the adjustment hole opening in hole is crossed on upper layer, coal gas, the air exhaust gas caused by flue lower combustion rise
At the top of to flue, a part enters across hole in the flue with down current through lower layer, and a part crosses over hole through upper layer
Into in the flue with down current, wherein there is heat transfer to make carbonization chamber upper space by the exhaust gas in upper layer across hole
With, make carbonization chamber upper space temperature improve；
4) after coke oven production state adjusts again, the carbonization chamber upper space temperature at 2/3 coking cycles moment is higher than 850
DEG C when, hitcher is stretched by furnace roof top peephole in the combustion chamber flue adjacent with carbonization chamber, slidable adjustment brick close
Corresponding adjustment hole；
When adjustment hole is equipped with it is multiple when, an adjustment hole is first closed, on the carbonization chamber for remeasuring for 2/3 coking cycles moment
If portion's space temperature increases the adjusting hole number of closing still without desired temperature is reached, repeatedly, until carbonization chamber
Upper space temperature reaches required temperature；
After the adjusting bore closure in hole is crossed on upper layer, coal gas, the air exhaust gas caused by flue lower combustion rise
It is most of to enter in the flue with down current across hole through lower layer at the top of to flue, enter tool across hole through upper layer
There is the tolerance in the flue of down current to reduce, the heat transfer effect of the exhaust gas to carbonization chamber upper space in hole is crossed over by upper layer
Reduce, makes the reduction of carbonization chamber upper space temperature；
5) it according to practical condition, is adjusted by step 3) or step 4), realizes carbonization chamber upper space temperature
Precisely adjust.
Compared with prior art, the beneficial effects of the invention are as follows：
1) structure of the adjustment structure is simple, can be changed on carbonization chamber easily and fast by changing adjusting brick state
Portion's space temperature；
2) in routine techniques in such a way that mill brick is blocked in the Vertical Channel that gas flows compared with, this hair
It is bright to be blocked in the horizontal channel that gas flows using adjusting brick, it does not influence through peephole to flue thermometric；
3) it can be crossed in hole on a upper layer as needed and multiple adjustment holes are set, to accurately improve carbonization chamber top
Space temperature.
Description of the drawings
Fig. 1 is a kind of front view of carbonization chamber upper space temperature regulation structure of the present invention.
Fig. 2 is a kind of side view of carbonization chamber upper space temperature regulation structure of the present invention.
Fig. 3 is a kind of perspective view one of carbonization chamber upper space temperature regulation structure of the present invention (at adjustment hole
In opening state).
Fig. 4 is a kind of perspective view two of carbonization chamber upper space temperature regulation structure of the present invention (at adjustment hole
In closed state).
In figure：1. 2. lower layer of duplex flue partition is adjusted across 3. interlayer of hole, 4. upper layer across 5. wall 6. of hole
10. flue partition of brick 7. adjustment hole, 8. peephole, 9. flue, 11. intercommunicating pore
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Figure 1 and Figure 2, a kind of carbonization chamber upper space temperature regulation structure of the present invention, the carbonization chamber of coke oven with
Interventricular septum of burning setting, combustion chamber are made of multiple flues 9, and the top of each flue 9 sets peephole 8；Flue is double
Simultaneous quirk is separated by flue partition 10 between each group duplex flue, 2 flues 9 of every group of duplex flue by
Duplex flue partition 1 separates；The top of duplex flue sets upper layer and crosses over hole 2 across hole 4 and lower layer respectively, upper and lower two layers
Interlayer 3 is set across between hole 4,2；The laterally elongated setting in duplex flue of the interlayer 3, both ends are separately connected both sides
Flue partition 10；Intercommunicating pore 11 is opened up respectively on interlayer 3 immediately below 2 flue peepholes 8；The water in hole 4 is crossed on upper layer
Air flow regulator is equipped in flat gas channel.
The width in the upper layer across hole 4 is equal with the width of duplex flue；The air flow regulator includes wall 5
And adjusting brick 6；Upper layer is crossed in hole 4, and wall 5, wall 5 are equipped between 2 intercommunicating pores 11 and at side intercommunicating pore 11
On open up adjustment hole 7, adjusting brick 6 is movably equipped at adjustment hole 7, adjusting brick 6 can partly or entirely seal adjustment hole 7
It closes.
The adjustment hole 7 sets 1 to multiple.
The adjusting brick 6 can be in the case where the hitcher stretched into from peephole 8 drives along the horizontal sliding of adjustment hole 7.
The lower layer is set to across hole 2 on duplex flue partition 1.
The apical side height in the upper layer across hole 4 is coaling line height less than carbonization chamber.
A kind of carbonization chamber upper space temperature control method based on the carbonization chamber upper space temperature regulation structure, packet
It includes：
1) according to carbonization chamber coal capacity, briquette degree of shrinkage, flue ignition temperature, and consider top dress coke making process
And/or the requirement of tamping coking technique, the bilayer at the top of the duplex flue of designed combustion room cross over pore structure；
2) in the normal productive process after coke oven is gone into operation, upper layer is closed across hole 4；At this point, coal gas, air exist
The exhaust gas of 9 lower combustion of flue, generation of burning rises to 9 top of flue, and entering across hole 2 through lower layer has down current
Flue 9；
3) after coke oven production state adjusts, the carbonization chamber upper space temperature at 2/3 coking cycles moment is less than 800 DEG C
When, hitcher is stretched by furnace roof top peephole 8 in the combustion chamber flue 9 adjacent with carbonization chamber, slidable adjustment brick 6 is opened
Corresponding adjustment hole 7；(as shown in Figure 3)
When adjustment hole 7 be equipped with it is multiple when, first open an adjustment hole 7, remeasure the carbonization chamber at 2/3 coking cycles moment
If upper space temperature increases open 7 quantity of adjustment hole still without desired temperature is reached, repeatedly, until charing
Room upper space temperature reaches required temperature；
After the opening of adjustment hole 7 in hole 4 is crossed on upper layer, coal gas, air are on the exhaust gas caused by 9 lower combustion of flue
Rise to the top of flue 9, a part enters across hole 2 in the flue 9 with down current through lower layer, a part through upper layer across
More hole 4 enters in the flue 9 with down current, wherein having to carbonization chamber upper space by the exhaust gas in upper layer across hole 4
There is heat transfer effect, carbonization chamber upper space temperature is made to improve；
4) after coke oven production state adjusts again, the carbonization chamber upper space temperature at 2/3 coking cycles moment is higher than 850
DEG C when, hitcher is stretched by furnace roof top peephole 8 in the combustion chamber flue 9 adjacent with carbonization chamber, slidable adjustment brick 6 close
Close corresponding adjustment hole；(as shown in Figure 4)
When adjustment hole 7 be equipped with it is multiple when, first close an adjustment hole 7, remeasure the carbonization chamber at 2/3 coking cycles moment
If upper space temperature increases by 7 quantity of adjustment hole of closing still without desired temperature is reached, repeatedly, until charing
Room upper space temperature reaches required temperature；
After the closing of adjustment hole 7 in hole 4 is crossed on upper layer, coal gas, air are on the exhaust gas caused by 9 lower combustion of flue
9 top of flue is risen to, it is most of to enter in the flue 9 with down current across hole 2 through lower layer, cross over hole 4 through upper layer
It is reduced into the tolerance in the flue 9 with down current, the exhaust gas in hole 4 is crossed over to carbonization chamber upper space by upper layer
Heat transfer effect reduces, and makes the reduction of carbonization chamber upper space temperature；
5) it according to practical condition, is adjusted by step 3) or step 4), realizes carbonization chamber upper space temperature
Precisely adjust.
As shown in Figure 3, Figure 4, a kind of carbonization chamber upper space temperature regulation structure of the present invention, passes through slidable adjustment brick
6 open or close adjustment hole 7, realize the adjusting that 4 exhaust gas flow of hole is crossed over to upper layer, and then realize carbonization chamber upper space temperature
The adjusting of degree；Wall 5 is arranged against side intercommunicating pore 11, is slided to adjusting brick 6 with hitcher convenient for passing through furnace roof peephole 8
It adjusts.
As a kind of specific embodiment of the present invention, adjusting brick 6 can be set to the side of wall 5,5 adjustment apertures 7 of wall
Top or set slideway over and under, the top or top of adjusting brick 6 and bottom correspond to and set sliding slot, are slided along slideway by sliding slot
The dynamic overall movement for realizing adjusting brick 6 and position adjustment；The initial position of adjusting brick 6, can after sliding in the side of adjustment hole 7
Adjustment hole 7 is covered.Dog hole is set on adjusting brick 6, for coordinating with the hitcher stretched into from peephole 8.When adjusting brick 6 is only in bottom
If when sliding slot, there is up-narrow and down-wide shape in width direction, it is such as trapezoidal, can increase in this way its it is high to stability.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of carbonization chamber upper space temperature regulation structure, carbonization chamber and the burning interventricular septum setting of coke oven, combustion chamber is by more
A flue forms, and peephole is set above each flue；Flue is duplex flue, is led between each group duplex flue
Flue partition separation is crossed, 2 flues of every group of duplex flue are separated by duplex flue partition；The top of duplex flue
Portion sets upper layer and crosses over hole across hole and lower layer respectively, and upper and lower two layers of leap sets interlayer between hole；It is characterized in that, the interlayer
The laterally elongated setting in duplex flue, both ends are separately connected the flue partition of both sides；2 flue peepholes just under
Intercommunicating pore is opened up respectively on the interlayer of side；Upper layer, which is crossed over, is equipped with air flow regulator in the horizontal gas flow channel in hole.
2. a kind of carbonization chamber upper space temperature regulation structure according to claim 1, which is characterized in that the upper layer across
More the width in hole is equal with the width of duplex flue；The air flow regulator includes wall and adjusting brick；Hole is crossed on upper layer
In, it is equipped with wall between 2 intercommunicating pores and at the intercommunicating pore of side, adjustment hole is opened up on wall, is moved at adjustment hole
Ground is equipped with adjusting brick, and adjusting brick can partly or entirely close adjustment hole.
3. a kind of carbonization chamber upper space temperature regulation structure according to claim 2, which is characterized in that the adjustment hole
If 1 to multiple.
4. a kind of carbonization chamber upper space temperature regulation structure according to claim 2, which is characterized in that the adjusting brick
Lower edge can be driven to adjust hole horizontal sliding in the hitcher stretched into from peephole.
5. a kind of carbonization chamber upper space temperature regulation structure according to claim 1, which is characterized in that the lower layer across
More hole is set on duplex flue partition.
6. a kind of carbonization chamber upper space temperature regulation structure according to claim 1 or 2, which is characterized in that on described
The apical side height in layer across hole is coaling line height less than carbonization chamber.
7. a kind of carbonization chamber upper space temperature based on carbonization chamber upper space temperature regulation structure described in claim 1 is adjusted
Method, which is characterized in that including：
1) according to carbonization chamber coal capacity, briquette degree of shrinkage, flue ignition temperature, and consider top dress coke making process and/or
The requirement of tamping coking technique, the bilayer at the top of the duplex flue of designed combustion room cross over pore structure；Target is：Closing upper layer
Across under conditions of hole, the carbonization chamber upper space temperature at 2/3 coking cycles moment, coke oven is less than 850 DEG C；
2) in the normal productive process after coke oven is gone into operation, upper layer is closed across hole；At this point, coal gas, air are in vertical fire
The exhaust gas of road lower combustion, generation of burning rises at the top of flue, enters the vertical fire with down current across hole through lower layer
Road；
It 3), will when the carbonization chamber upper space temperature at 2/3 coking cycles moment is less than 800 DEG C after coke oven production state adjusts
Hitcher is stretched by furnace roof top peephole in the combustion chamber flue adjacent with carbonization chamber, and slidable adjustment brick opens corresponding tune
Knothole；
When adjustment hole is equipped with it is multiple when, first open an adjustment hole, the carbonization chamber top for remeasuring for 2/3 coking cycles moment is empty
Between temperature increase open adjusting hole number if still without desired temperature is reached, repeatedly, until carbonization chamber top
Space temperature reaches required temperature；
After the adjustment hole opening in hole is crossed on upper layer, coal gas, the air exhaust gas caused by flue lower combustion rise to vertical
At the top of quirk, a part enters across hole in the flue with down current through lower layer, and a part enters through upper layer across hole
In flue with down current, wherein there is heat transfer effect to carbonization chamber upper space by the exhaust gas in upper layer across hole,
Carbonization chamber upper space temperature is set to improve；
4) after coke oven production state adjusts again, the carbonization chamber upper space temperature at 2/3 coking cycles moment is higher than 850 DEG C
When, hitcher is stretched by furnace roof top peephole in the combustion chamber flue adjacent with carbonization chamber, the closing pair of slidable adjustment brick
The adjustment hole answered；
When adjustment hole is equipped with it is multiple when, first close an adjustment hole, the carbonization chamber top for remeasuring for 2/3 coking cycles moment is empty
Between temperature increase the adjusting hole number of closing if still without desired temperature is reached, repeatedly, until carbonization chamber top
Space temperature reaches required temperature；
After the adjusting bore closure in hole is crossed on upper layer, coal gas, the air exhaust gas caused by flue lower combustion rise to vertical
Quirk top, major part enter across hole in the flue with down current through lower layer, and hole is crossed under having through upper layer
Tolerance in the flue of sending down abnormally ascending stream is reduced, and the exhaust gas by upper layer across hole subtracts the heat transfer effect of carbonization chamber upper space
It is small, make the reduction of carbonization chamber upper space temperature；
5) it according to practical condition, is adjusted by step 3) or step 4), realizes the accurate of carbonization chamber upper space temperature
It adjusts.
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|---|---|---|---|
| CN201810296300.7A CN108315025B (en) | 2018-03-30 | 2018-03-30 | Carbonization chamber upper space temperature adjusting structure and adjusting method |
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|---|---|---|---|
| CN201810296300.7A CN108315025B (en) | 2018-03-30 | 2018-03-30 | Carbonization chamber upper space temperature adjusting structure and adjusting method |
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| CN108315025B CN108315025B (en) | 2023-11-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111057558A (en) * | 2019-12-31 | 2020-04-24 | 山东钢铁集团日照有限公司 | Application method of hydrogen-rich gas generated after LNG (liquefied Natural gas) process in coke oven heating |
| CN112342039A (en) * | 2020-11-26 | 2021-02-09 | 中冶焦耐(大连)工程技术有限公司 | Coke oven combustion chamber structure with oven wall thickness changing along height direction |
| CN112574761A (en) * | 2020-12-30 | 2021-03-30 | 中冶焦耐(大连)工程技术有限公司 | Coke oven top structure for realizing smokeless coal charging |
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