CN109506485A - Low-heat value gas MAERZ lime kiln exhaust heat utilization system - Google Patents
Low-heat value gas MAERZ lime kiln exhaust heat utilization system Download PDFInfo
- Publication number
- CN109506485A CN109506485A CN201811531706.5A CN201811531706A CN109506485A CN 109506485 A CN109506485 A CN 109506485A CN 201811531706 A CN201811531706 A CN 201811531706A CN 109506485 A CN109506485 A CN 109506485A
- Authority
- CN
- China
- Prior art keywords
- exhaust gas
- air
- thorax
- reversal valve
- heat exchanger
- 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.)
- Granted
Links
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 19
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 19
- 239000004571 lime Substances 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 142
- 210000000038 chest Anatomy 0.000 claims abstract description 122
- 238000001354 calcination Methods 0.000 claims abstract description 46
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 239000002912 waste gas Substances 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims abstract description 9
- 238000010304 firing Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
- F23L15/045—Arrangements of recuperators using intermediate heat-transfer fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
- Furnace Details (AREA)
Abstract
The present invention relates to a kind of low-heat value gas MAERZ lime kiln exhaust heat utilization systems, including A thorax air/exhaust gas reversal valve, B thorax air/exhaust gas reversal valve, A thorax air/exhaust gas heat exchanger, B thorax air/exhaust gas heat exchanger and air reversing valve.The beneficial effect is that: increase heat exchanger before air/exhaust gas reversal valve of MAERZ lime kiln, it is exchanged heat using kiln combustion air is entered with kiln discharge exhaust gas, not only waste gas residual heat can effectively be recycled, while improve the physical sensible heat of combustion air, be more conducive to improving calcination temperature.Meanwhile by the heat exchange of combustion air and exhaust gas, reduce the temperature of kiln discharge exhaust gas, extend the service life of reversal valve, dust-collecting bag, and reduce and mix cold blast rate, reduce smoke evacuation system load, it can be achieved that energy-saving and emission-reduction purpose.
Description
Technical field
The present invention relates to metallurgy lime production technical fields, more than a kind of low-heat value gas MAERZ lime kiln exhaust gas
Heat utilization system.
Background technique
MAERZ lime kiln is one of the mainstream kiln type of iron and steel enterprise's production lime, and cocurrent heat accumulating type is used to calcine principle, tool
There is many advantages, such as low heat consumption, good product quality.With energy inside the continuous propulsion of MAERZ lime kiln technology and each iron and steel enterprise
The diversity adjustment of source distribution, constantly derives various novel MAERZ lime kiln calcining technologies, as low-heat value gas MAERZ lime kiln is forged
Burning technology.
Compared to traditional MAERZ lime kiln calcining technology, low-heat value gas calcining technology has wide excellent of suitability of fuel
Point, but influenced simultaneously by calorific value of gas is low, calcination temperature is lower, and exhaust gas temperature is higher, compared to similar high heating value gas
MAERZ lime kiln, product quality and heat consumption index are all more difficult to reach.Meanwhile high fume temperature can also to air/exhaust gas reversal valve,
The service life of the equipment such as dust-collecting bag makes a big impact, at present solution be typically required optional equipment mix cold wind dress
It sets and is cooled down, this not only adds the loads of deduster and induced-draft fan, and the higher waste gas residual heat of temperature is not had
Effect utilizes, fundamentally without solving the problems, such as to reduce heat consumption, improving calcination temperature and product quality.
Summary of the invention
To overcome prior art defect, it is useless that the technical problem to be solved by the present invention is to provide a kind of low-heat value gas MAERZ lime kilns
Gas afterheat utilizing system increases heat exchanger before air/exhaust gas reversal valve of MAERZ lime kiln, using entering kiln combustion air and kiln discharge
Exhaust gas exchanges heat, and not only can effectively recycle waste gas residual heat, reduce kiln discharge exhaust gas temperature, while improving combustion air
Physical sensible heat is more conducive to improving calcination temperature.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
Low-heat value gas MAERZ lime kiln exhaust heat utilization system, including A thorax air/exhaust gas reversal valve, B thorax air/useless
Gas reversal valve, A thorax air/exhaust gas heat exchanger, B thorax air/exhaust gas heat exchanger and air reversing valve, which is characterized in that the sky
Combustion air supervisor is divided into two on entering kiln combustion air supervisor, divides and calcine to A calcining kiln thorax and B by the setting of gas reversal valve
Kiln thorax, and be connected respectively with A thorax air/exhaust gas heat exchanger and B thorax air/exhaust gas heat exchanger air intake, it is converged after exchanging heat
Always it is connected respectively with A thorax air/exhaust gas reversal valve and B thorax air/exhaust gas reversal valve air intake；The A calcining kiln thorax and B
Waste gas outlet pipeline/combustion air inlet pipeline of calcining kiln thorax, respectively with A thorax air/exhaust gas heat exchanger and B thorax air/useless
The exhaust gas entrance of gas heat exchanger is connected, useless with A kiln thorax air/exhaust gas reversal valve and B thorax air/exhaust gas reversal valve after exchanging heat
Gas entrance is connected, and A thorax air/exhaust gas reversal valve and B thorax air/exhaust gas reversal valve waste gas outlet pipeline lead to dedusting after summarizing
Device and chimney go smoke evacuation dedusting.
The A thorax air/exhaust gas heat exchanger and B thorax air/exhaust gas heat exchanger are all made of typical shell-and-tube heat exchanger, help
Combustion air is walked in pipe, and exhaust gas is walked outside pipe.
Further, can add in A thorax air/exhaust gas heat exchanger and B thorax air/exhaust gas heat exchanger heat exchanger tube as needed
Add accumulation of heat casing, to improve heat transfer effect.
Its working principle, includes the following steps:
1) when B calcining kiln thorax calcining work: air reversing valve switches to the connection of A calcining kiln thorax thorax direction, A thorax air/useless
The valve plate of gas reversal valve switches to exhaust gas side opening, and B thorax air/exhaust gas reversal valve valve plate switches to exhaust gas side closing, combustion-supporting
Air exchanges heat, the combustion air after preheating is through B thorax through A thorax air/exhaust gas heat exchanger with the kiln discharge exhaust gas of A calcining kiln thorax
Air/exhaust gas reversal valve enters B thorax air/exhaust gas heat exchanger, and B calcining kiln thorax is entered after exchanging heat, mixed with the coal gas of burning zone
Combination burning is logical through A thorax air/exhaust gas reversal valve after the kiln discharge exhaust gas of A calcining kiln thorax is by A thorax air/exhaust gas heat exchanger heat exchange
Smoke evacuation dedusting is gone toward deduster and chimney；
2) when A calcining kiln thorax calcining work: air reversing valve switches to the connection of B calcining kiln thorax thorax direction, B thorax air/useless
The valve plate of gas reversal valve switches to exhaust gas side opening, and A thorax air/exhaust gas reversal valve valve plate switches to exhaust gas side closing, combustion-supporting
Air exchanges heat, the combustion air after preheating is through A thorax through B thorax air/exhaust gas heat exchanger with the kiln discharge exhaust gas of B calcining kiln thorax
Air/exhaust gas reversal valve enters A thorax air/exhaust gas heat exchanger, and A calcining kiln thorax is entered after exchanging heat, mixed with the coal gas of burning zone
Combination burning is logical through B thorax air/exhaust gas reversal valve after the kiln discharge exhaust gas of B calcining kiln thorax is by B thorax air/exhaust gas heat exchanger heat exchange
Smoke evacuation dedusting is gone toward deduster and chimney.
Compared with prior art, the beneficial effects of the present invention are:
1) present invention effective use waste gas residual heat, improves the physical sensible heat of combustion air, and then improve calcination temperature
And product quality；
2) heat exchange for passing through combustion air and exhaust gas, reduces kiln discharge exhaust gas temperature, extends reversal valve, deduster cloth
The service life of bag, while reducing and mixing cold blast rate, smoke evacuation system load is reduced, the purpose of energy-saving and emission-reduction is realized.
Detailed description of the invention
Principle schematic diagram when Fig. 1 is the B calcining kiln thorax calcining work of the present invention；
Principle schematic diagram when Fig. 2 is the A calcining kiln thorax calcining work of the present invention.
In figure: 1-A thorax air/exhaust gas reversal valve 2-B thorax air/exhaust gas reversal valve 3-A thorax air/exhaust gas heat exchanger
4-B thorax air/exhaust gas heat exchanger 5- air reversing valve
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:
As shown in Fig. 1, Fig. 2, a kind of low-heat value gas MAERZ lime kiln exhaust heat utilization system of the present invention, including
A thorax air/exhaust gas reversal valve 1, B thorax air/exhaust gas reversal valve 2, A thorax air/exhaust gas heat exchanger 3, B thorax air/exhaust gas heat exchange
Device 4 and air reversing valve 5, the setting of air reversing valve 5 are for one point on entering kiln combustion air supervisor, by combustion air supervisor
Two, point to A calcining kiln thorax and B calcining kiln thorax, and respectively with A thorax air/exhaust gas heat exchanger 3 and B thorax air/exhaust gas heat exchanger 4
Air intake be connected, summarize after exchanging heat respectively with A thorax air/exhaust gas reversal valve 1 and B thorax air/exhaust gas reversal valve 2 sky
Gas entrance is connected；Waste gas outlet pipeline/combustion air inlet pipeline of the A calcining kiln thorax and B calcining kiln thorax, respectively with A thorax
Air/exhaust gas heat exchanger 3 is connected with B thorax air/exhaust gas heat exchanger 4 exhaust gas entrance, after exchanging heat with A kiln thorax air/exhaust gas
Reversal valve 1 is connected with B thorax air/exhaust gas reversal valve 2 exhaust gas entrance, A thorax air/exhaust gas reversal valve 1 and B thorax air/exhaust gas
The waste gas outlet pipeline of reversal valve 2 leads to deduster after summarizing and chimney goes smoke evacuation dedusting.
The A thorax air/exhaust gas heat exchanger 3 and B thorax air/exhaust gas heat exchanger 4 are all made of typical shell-and-tube heat exchanger,
Combustion air is walked in pipe, and exhaust gas is walked outside pipe.
It further, can be as needed in A thorax air/exhaust gas heat exchanger 3 and B thorax air/exhaust gas heat exchanger 4 heat exchanger tube
Accumulation of heat casing is added, to improve heat transfer effect.
Its working principle, includes the following steps:
1) when B calcining kiln thorax calcining work: air reversing valve 5 switches to the connection of A calcining kiln thorax thorax direction, A thorax air/useless
The valve plate of gas reversal valve 1 switches to exhaust gas side opening, and B thorax air/exhaust gas reversal valve 2 valve plate switches to exhaust gas side closing, helps
Air is fired through A thorax air/exhaust gas heat exchanger 3, is exchanged heat with the kiln discharge exhaust gas of A calcining kiln thorax, the combustion air after preheating is through B
Thorax air/exhaust gas reversal valve 2 enters B thorax air/exhaust gas heat exchanger 4, and B calcining kiln thorax, the coal with burning zone are entered after exchanging heat
Gas is mixed and burned, and after the kiln discharge exhaust gas of A calcining kiln thorax is exchanged heat by A thorax air/exhaust gas heat exchanger 3, is changed through A thorax air/exhaust gas
Lead to deduster to valve 1 and chimney goes smoke evacuation dedusting；
2) when A calcining kiln thorax calcining work: air reversing valve 5 switches to the connection of B calcining kiln thorax thorax direction, B thorax air/useless
The valve plate of gas reversal valve 2 switches to exhaust gas side opening, and A thorax air/exhaust gas reversal valve 1 valve plate switches to exhaust gas side closing, helps
Air is fired through B thorax air/exhaust gas heat exchanger 4, is exchanged heat with the kiln discharge exhaust gas of B calcining kiln thorax, the combustion air after preheating is through A
Thorax air/exhaust gas reversal valve 1 enters A thorax air/exhaust gas heat exchanger 3, and A calcining kiln thorax, the coal with burning zone are entered after exchanging heat
Gas is mixed and burned, and after the kiln discharge exhaust gas of B calcining kiln thorax is exchanged heat by B thorax air/exhaust gas heat exchanger 4, is changed through B thorax air/exhaust gas
Lead to deduster to valve 2 and chimney goes smoke evacuation dedusting.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone 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 (2)
1. low-heat value gas MAERZ lime kiln exhaust heat utilization system, including A thorax air/exhaust gas reversal valve, B thorax air/exhaust gas
Reversal valve, A thorax air/exhaust gas heat exchanger, B thorax air/exhaust gas heat exchanger and air reversing valve, which is characterized in that the air
Combustion air supervisor is divided into two, divides to A calcining kiln thorax and B calcining kiln on entering kiln combustion air supervisor by reversal valve setting
Thorax, and be connected respectively with A thorax air/exhaust gas heat exchanger and B thorax air/exhaust gas heat exchanger air intake, summarize after exchanging heat
It is connected respectively with A thorax air/exhaust gas reversal valve and B thorax air/exhaust gas reversal valve air intake；The A calcining kiln thorax and B are forged
Waste gas outlet pipeline/combustion air inlet pipeline of firing thorax, respectively with A thorax air/exhaust gas heat exchanger and B thorax air/exhaust gas
The exhaust gas entrance of heat exchanger is connected, after exchanging heat with A kiln thorax air/exhaust gas reversal valve and B thorax air/exhaust gas reversal valve exhaust gas
Entrance is connected, and A thorax air/exhaust gas reversal valve and B thorax air/exhaust gas reversal valve waste gas outlet pipeline lead to deduster after summarizing
Smoke evacuation dedusting is gone with chimney.
2. low-heat value gas MAERZ lime kiln exhaust heat utilization system according to claim 1, which is characterized in that the A
Thorax air/exhaust gas heat exchanger and B thorax air/exhaust gas heat exchanger are all made of typical shell-and-tube heat exchanger, and combustion air is walked in pipe,
Exhaust gas is walked outside pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811531706.5A CN109506485B (en) | 2018-12-14 | 2018-12-14 | Waste gas waste heat utilization system of low-calorific-value gas double-chamber shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811531706.5A CN109506485B (en) | 2018-12-14 | 2018-12-14 | Waste gas waste heat utilization system of low-calorific-value gas double-chamber shaft kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109506485A true CN109506485A (en) | 2019-03-22 |
| CN109506485B CN109506485B (en) | 2024-03-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811531706.5A Active CN109506485B (en) | 2018-12-14 | 2018-12-14 | Waste gas waste heat utilization system of low-calorific-value gas double-chamber shaft kiln |
Country Status (1)
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| CN (1) | CN109506485B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB745104A (en) * | 1953-10-24 | 1956-02-22 | Gen Refractories Ltd | Multiple kiln installation and method of operation |
| EP0878681A2 (en) * | 1997-04-25 | 1998-11-18 | Nippon Furnace Kogyo Kaisha Ltd. | Firing control apparatus and firing control method |
| CN101723605A (en) * | 2009-12-08 | 2010-06-09 | 福州闽缘电子有限公司 | Afterheat recycling method based on steel-making double-hearth lime kiln |
| CN203033894U (en) * | 2012-12-31 | 2013-07-03 | 广东韶钢松山股份有限公司 | Parallel flow heat storage double chamber kiln support arch structure |
| CN203687658U (en) * | 2014-01-21 | 2014-07-02 | 唐山钢铁国际工程技术有限公司 | Double-chamber heat accumulating type lime shaft kiln smoke heat exchange pipeline |
| CN104515402A (en) * | 2013-09-28 | 2015-04-15 | 沈阳铝镁设计研究院有限公司 | Method and device for waste-heat utilization of sintering system |
| CN209310526U (en) * | 2018-12-14 | 2019-08-27 | 中冶焦耐(大连)工程技术有限公司 | Low-heat value gas MAERZ lime kiln exhaust heat utilization system |
-
2018
- 2018-12-14 CN CN201811531706.5A patent/CN109506485B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB745104A (en) * | 1953-10-24 | 1956-02-22 | Gen Refractories Ltd | Multiple kiln installation and method of operation |
| EP0878681A2 (en) * | 1997-04-25 | 1998-11-18 | Nippon Furnace Kogyo Kaisha Ltd. | Firing control apparatus and firing control method |
| CN101723605A (en) * | 2009-12-08 | 2010-06-09 | 福州闽缘电子有限公司 | Afterheat recycling method based on steel-making double-hearth lime kiln |
| CN203033894U (en) * | 2012-12-31 | 2013-07-03 | 广东韶钢松山股份有限公司 | Parallel flow heat storage double chamber kiln support arch structure |
| CN104515402A (en) * | 2013-09-28 | 2015-04-15 | 沈阳铝镁设计研究院有限公司 | Method and device for waste-heat utilization of sintering system |
| CN203687658U (en) * | 2014-01-21 | 2014-07-02 | 唐山钢铁国际工程技术有限公司 | Double-chamber heat accumulating type lime shaft kiln smoke heat exchange pipeline |
| CN209310526U (en) * | 2018-12-14 | 2019-08-27 | 中冶焦耐(大连)工程技术有限公司 | Low-heat value gas MAERZ lime kiln exhaust heat utilization system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109506485B (en) | 2024-03-19 |
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