CN202390462U - Coal gas and air asynchronous dual preheating system provided with additional combustion furnace - Google Patents
Coal gas and air asynchronous dual preheating system provided with additional combustion furnace Download PDFInfo
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- CN202390462U CN202390462U CN2011204864052U CN201120486405U CN202390462U CN 202390462 U CN202390462 U CN 202390462U CN 2011204864052 U CN2011204864052 U CN 2011204864052U CN 201120486405 U CN201120486405 U CN 201120486405U CN 202390462 U CN202390462 U CN 202390462U
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Abstract
The utility model relates to a coal gas and air asynchronous dual preheating system provided with an additional combustion furnace, which comprises a plate type air pre-heater, a plate type coal gas pre-heater, a chimney, a combustion furnace, a smoke pipeline and control system, an air pipeline and control system, and a coal gas pipeline and control system. The coal gas and air asynchronous dual preheating system provided with the additional combustion furnace has the advantages that temperature of the air and the coal gas can be adjusted according to requirements, and smoke discharged by a hot-blast stove is divided into two parts: one part of the smoke is mixed with high temperature smoke generated by a vertical combustion furnace, and the air is preheated to about 450 DEG C through the air pre-heater, and the other part of smoke directly preheats the coal gas to be in a range of 180 DEG C to 200 DEG C, so as to provide firm foundation for achieving complete combustion of the hot-blast stove and increasing theoretical combustion temperature; the plate type pre-heater has the advantages of being high in heat transmitting efficiency, compact in structure, corrosion resistant, long in service life, not easy for dust deposition, easy to clean and the like; and the coal gas and air asynchronous dual preheating system has reasonable and compact structure, and is high in operating condition stability, convenient to operate, and capable of being generalized.
Description
Technical field:
The present invention relates to a kind of smelting of iron and steel, particularly relate to a kind of asynchronous double-preheating system of coal gas, air that is used for the additional combustion stove of hotblast stove.
Technical background:
Air, gas preheating device are to carry out heat exchange through the high-temperature flue gas that hotblast stove produces with used freezing air of burning and inflammable gas; Thereby the temperature of improving freezing air and the inflammable gas of hotblast stove reduces the energy consumption of equipment; With high-temperature flue gas cooling, reduction dust content; The discharging that reduces flue dust and obnoxious flavour (like sulfurous gas, oxynitride etc.) is to reach environmental requirement, and this has become common recognition in the industry.Hotblast stove will realize that can efficient key with high wind-warm syndrome be in burning and heat transfer process, reach perfect combustion and high duty heat transfer.The inventor constantly studies and puts into practice in secular working practice; The preheating temperature of learning further raising air and coal gas will more help perfect combustion and improve theoretical combustion temperature; For making heat transfer process efficiently adopt plate-type heat exchanger is preferred, and the present invention is the product that the two is combined effectively.
Summary of the invention:
The objective of the invention is to provide a kind of rational in infrastructure, reliable operation, can realize the asynchronous double-preheating system of the coal gas that is provided with the additional combustion stove, air higher wind-warm syndrome, the minimizing environmental pollution to the prior art weak point.
The objective of the invention is to realize: a kind of asynchronous double-preheating system of coal gas, air that is provided with the additional combustion stove through following measure; Comprise plate air preheater, board-like gas preheating device, chimney; It is characterized in that also having roasting kiln, flue gas pipeline and system, airline and system, gaspipe line and system; Wherein:
Said flue gas pipeline and system be by flue I/O pipeline section, blower fan, roasting kiln flue gas input/output end port; Roasting kiln flue gas I/O pipeline section, plate air preheater flue gas input/output end port, the flue gas input/output end port of board-like gas preheating device; Flue bypass pipeline section; Chimney, plurality of control valves, some thermometrics/load cell is formed; Said flue input pipeline section give a dinner for a visitor from afar respectively flue gas input port, the flue bypass pipeline section of machine input port, board-like gas preheating device; Said roasting kiln flue gas input pipeline section connects blower fan output port and roasting kiln flue gas input port; Roasting kiln flue gas output pipeline section connects roasting kiln flue gas output port and plate air preheater flue gas input port; The flue gas output port of plate air preheater flue gas output port, board-like gas preheating device, the splice connection of flue bypass pipeline section are to flue output pipeline section, and flue output pipeline section links to each other with chimney; Said flue input blower fan pipeline section, roasting kiln flue gas input pipeline section, plate air preheater flue gas output pipeline section, board-like gas preheating device flue I/O pipeline section, flue bypass pipeline section are equipped with valve; Said flue pipeline input tube section, flue pipeline output tube section are equipped with thermometric/load cell; Roasting kiln flue gas I/O pipeline section is equipped with thermometric/load cell; Plate air preheater flue gas output port pipeline section is equipped with thermometric/load cell, and the flue gas output port pipeline section of board-like gas preheating device is equipped with temperature element;
Said airline and system are by air line I/O pipeline section; The air input/output end port of plate air preheater; Air line bypass pipeline section, plurality of control valves, some thermometrics, load cell are formed; The air input/output end port of said plate air preheater connects air line I/O pipeline section respectively; Air line bypass pipeline section is connected between the air line I/O pipeline section; The air input/output end port pipeline section of said plate air preheater is equipped with valve separately, and air line bypass pipeline section is equipped with variable valve and shut-off valve, on said air line input pipeline section, the air line output pipeline section thermometric, load cell is installed separately;
Said gaspipe line and system are imported pipeline section, the first output pipeline section, the second output pipeline section by gas line; The coal gas input/output end port of board-like gas preheating device; Gas line bypass pipeline section, plurality of control valves, some thermometrics/load cell are formed; The coal gas input port of said board-like gas preheating device connects gas line input pipeline section; The coal gas output port of board-like gas preheating device connects the first output pipeline section, the second output pipeline section; Gas line bypass pipeline section is connected between the gas line input pipeline section and the first output pipeline section, and the coal gas input port pipeline section of said board-like gas preheating device, the first output pipeline section, the second output pipeline section, gas line bypass pipeline section are equipped with valve separately, on said gas line input pipeline section, the first output pipeline section thermometric/load cell is installed.
Said roasting kiln is provided with auxiliary air input system and auxiliary coal gas input system; The accessory fan that said auxiliary air input system is connected by air line successively, thermometric/load cell, valve, roasting kiln air input port are formed, and the trip valve that said auxiliary coal gas input system is connected by gas line successively, thermometric/pressure element, by-pass valve control, roasting kiln coal gas input port are formed.
Compared with prior art; The asynchronous double-preheating system of the coal gas that is provided with the additional combustion stove, air that the present invention proposes; Have following advantage: 1) native system can be regulated air, temperature of gas as required; The flue gas that hotblast stove is discharged is divided into two portions, and part of smoke is mixed with the high-temperature flue gas that vertical shaft furnace produces, and passes through air preheater again with about preheating of air to 450 ℃; The direct preheating gas to 180 of another part～200 ℃ provides solid basis for realizing hotblast stove perfect combustion and raising theoretical combustion temperature; 2) plate type preheater of native system has heat transfer efficiency height, compact construction, and is corrosion-resistant, the life-span is long, is difficult for dust stratification, is prone to advantage such as cleaning; 3) native system is rational in infrastructure, compact, and operating mode stability is high, and easy to operate, system's regulating power strong, the easy care maintenance, is a propagable project.
Description of drawings:
Fig. 1 is the example structure synoptic diagram that the present invention proposes.
Embodiment:
Below in conjunction with accompanying drawing embodiment is elaborated: in one embodiment of the present of invention shown in Figure 1.Among the figure; A kind of asynchronous double-preheating system of coal gas, air that is provided with the additional combustion stove comprises: plate air preheater 4, board-like gas preheating device 15, chimney 14, roasting kiln 23, flue gas pipeline and system, airline and system, gaspipe line and system; Wherein:
Said flue gas pipeline and system be by flue 24 I/O pipeline sections, blower fan 21, roasting kiln 23 flue gas input/output end ports; Roasting kiln 23 flue I/O pipeline sections, plate air preheater 4 flue gas input/output end ports, the flue gas input/output end port of board-like gas preheating device 15; Flue 24 bypass pipeline sections; Chimney 14, plurality of control valves, some thermometrics, load cell are formed; Said flue 24 input pipeline sections give a dinner for a visitor from afar respectively flue gas input port, the flue 24 bypass pipeline sections of machine 21 input ports, board-like gas preheating device 15; Said roasting kiln 23 flues input pipeline section connects blower fan 21 output ports and roasting kiln 23 flue gas input ports; Roasting kiln 23 flues output pipeline section connects roasting kiln 23 flue gas output ports and plate air preheater 4 flue gas input ports; The flue gas output port of plate air preheater 4 flue gas output ports, board-like gas preheating device 15, flue 24 bypass pipeline section splice connections are to flue 24 output pipeline sections, and flue 24 output pipeline sections link to each other with chimney 14; Said flue 24 input blower fans 21 pipeline sections are equipped with valve 22, roasting kiln flue gas input pipeline section and valve 20, plate air preheater 4 flue gases output pipeline section are installed valve 19, board-like gas preheating device 15 flue I/O pipeline sections are equipped with valve 17/13, flue 24 bypass pipeline sections are equipped with valve 18; Said flue pipeline 24 I/O pipeline sections are equipped with thermometric/load cell 2; Roasting kiln flue gas I/O pipeline section is equipped with thermometric/pressure element 2; Plate air preheater 4 flue gas output port pipeline sections are equipped with thermometric/load cell 2, and the flue gas output port pipeline section of board-like gas preheating device 15 is equipped with temperature element 2b.In flue gas pipeline; A hot-blast stove fume part feeds vertical shaft furnace wind mixed chamber through smoke induced draught fan and mixes with the high-temperature flue gas that vertical shaft furnace produces; Mixed flue-gas temperature reaches about 600 ℃; Mixed flue gas is sent into three flow process plate air preheaters and is discharged sensible heat, and the hotblast stove combustion air is preheating to about 450 ℃; Another part hot-blast stove fume discharges sensible heat through board-like gas preheating device, burns sending into hotblast stove behind gas preheating to 180～200 ℃, and flue-gas temperature is reduced to 140～150 ℃ enters chimney, realizes the recycling of the waste heat energy.In addition, through regulating flue bypass pipeline section valve pressure, flow, preheating temperature and the exhaust temperature of the flue gas of flue are regulated.
Said airline and system are by air line 10 I/O pipeline sections; The air input/output end port of plate air preheater 4; Air line 10 bypass pipeline sections, plurality of control valves, some thermometric/load cells 2 are formed; The air input/output end port of said plate air preheater 4 connects air line 10 I/O pipeline sections respectively; Air line 10 bypass pipeline sections are connected between the air line 10 I/O pipeline sections; The air input/output end port pipeline section of said plate air preheater 4 is equipped with valve 8/3 separately, and air line 10 bypass pipeline sections are equipped with variable valve 7 and shut-off valve 5, on the said air line 10 I/O pipeline sections thermometric/load cell 2 are installed separately.In airline, on three flow process plate air preheater air input/output end port pipeline sections and the bypass pipeline section regulated valve is set, three flow process plate air preheater input/output end port pipeline sections are provided with temperature and pressure detection and access control system.The normal temperature combustion air is warming up to about 450 ℃ after through three flow process plate air preheaters, realizes the preheating to combustion air, and through regulating flow, pressure and the preheating temperature of the valve control hotblast stove combustion air on the air by-pass pipeline.
Said gaspipe line and system are exported pipeline section 22 by gas line input pipeline section 11, the first output pipeline section 21, second; The coal gas input/output end port of board-like gas preheating device 15, gas line bypass pipeline section 23, plurality of control valves, some thermometrics/load cell are formed; The coal gas input port of said board-like gas preheating device 15 connects gas line input pipeline section; The coal gas output port of board-like gas preheating device 15 connects the first output pipeline section, the second output pipeline section; Gas line bypass pipeline section 23 is connected between the gas line input pipeline section 11 and the first output pipeline section 22; The coal gas input port pipeline section of said board-like gas preheating device 15 is equipped with valve 12, the first output pipeline section and is equipped with that valve 211, the second output pipeline section are equipped with valve 221, gas line bypass pipeline section is equipped with valve 231, on said gas line input pipeline section 11, the first output pipeline section 21 thermometric/load cell 2 is installed.In gaspipe line; Low temperature coal gas passes through gaspipe line; Get into the gas preheating device through gas preheating device inlet variable valve and carry out preheating, with temperature increase to 180～200 ℃ after the gas preheating device exports the regulated valve of first output channel sends into hotblast stove and burn.Through regulating gas line bypass pipeline section valve pressure, flow and the preheating temperature of gaspipe line are regulated.The second output pipeline section joins through the auxiliary coal gas input system of valve and roasting kiln.
The present invention further takes following measure:
Said roasting kiln 23 is provided with auxiliary air input system and auxiliary coal gas input system; The accessory fan 29 that said auxiliary air input system is connected by air line successively, shut-off valve 28, variable valve 26, thermometric/load cell 2, roasting kiln 23 air input ports are formed, and the shut-off valve 27 that said auxiliary coal gas input system is connected by gas line successively, variable valve 25, thermometric/load cell 2, roasting kiln coal gas input port are formed.Shut-off valve 27 the other ends of gas line are connected with the second output pipeline section of gaspipe line and system.
During the plate type air that the present invention adopts, gas double system operation, the high-temperature flue gas that hotblast stove produces, low temperature combustion air, coal gas add strong disturbance through the corrugated board cluster of plate type preheater in the passage that section constantly changes; Can be implemented in (Re=200) formation turbulent flow under the low reynolds number, enhance heat transfer performance, complex heat transfer coefficient K can reach higher level; Can be steadily in the long term with about preheating of air to 450 ℃; About gas preheating to 180～200 ℃, improve 200～250 ℃ of wind-warm syndrome, possessed the condition that reaches perfect combustion; Therefore hotblast stove can realize that with single blast furnace gas be fuel, makes wind-warm syndrome reach the ability more than 1250 ℃.Can reduce iron coke per ton ratio 40～50Kg/ ton iron, increase the iron amount 8～10% of producing, increase injecting coal quantity 40～50Kg/ ton iron, and solve the problem of diffusing of blast furnace gas, reduce environmental pollution, bring huge economic benefit to the user.
Combine accompanying drawing to describe embodiment of the present invention above, the structure that embodiment provides is not construed as limiting the invention, and those skilled in the art make various distortion within the scope of the appended claims or revise all in protection domain in this area.
Claims (2)
1. asynchronous double-preheating system of coal gas, air that is provided with the additional combustion stove; Comprise plate air preheater, board-like gas preheating device, chimney; It is characterized in that also having roasting kiln, flue gas pipeline and system, airline and system, gaspipe line and system; Wherein:
Said flue gas pipeline and system be by flue I/O pipeline section, blower fan, roasting kiln flue gas input/output end port; Roasting kiln flue gas I/O pipeline section, plate air preheater flue gas input/output end port, the flue gas input/output end port of board-like gas preheating device; Flue bypass pipeline section; Chimney, plurality of control valves, some thermometrics/load cell is formed; Said flue input pipeline section give a dinner for a visitor from afar respectively flue gas input port, the flue bypass pipeline section of machine input port, board-like gas preheating device; Said roasting kiln flue gas input pipeline section connects blower fan output port and roasting kiln flue gas input port; Roasting kiln flue gas output pipeline section connects roasting kiln flue gas output port and plate air preheater flue gas input port; The flue gas output port of plate air preheater flue gas output port, board-like gas preheating device, the splice connection of flue bypass pipeline section are to flue output pipeline section, and flue output pipeline section links to each other with chimney; Said flue input blower fan pipeline section, plate air preheater flue gas output pipeline section, board-like gas preheating device flue I/O pipeline section, flue bypass pipeline section are equipped with valve; Said flue pipeline input tube section, flue pipeline output tube section are equipped with thermometric/load cell; Roasting kiln flue gas I/O pipeline section is equipped with thermometric/load cell; Plate air preheater flue gas output port pipeline section is equipped with thermometric/load cell, and the flue gas output port pipeline section of board-like gas preheating device is equipped with temperature element;
Said airline and system are by air line I/O pipeline section; The air input/output end port of plate air preheater; Air line bypass pipeline section, plurality of control valves, some thermometrics, load cell are formed; The air input/output end port of said plate air preheater connects air line I/O pipeline section respectively; Air line bypass pipeline section is connected between the air line I/O pipeline section; The air input/output end port pipeline section of said plate air preheater is equipped with valve separately, and air line bypass pipeline section is equipped with variable valve and shut-off valve, on said air line input pipeline section, the air line output pipeline section thermometric/load cell is installed separately;
Said gaspipe line and system are imported pipeline section, the first output pipeline section, the second output pipeline section by gas line; The coal gas input/output end port of board-like gas preheating device; Gas line bypass pipeline section, plurality of control valves, some thermometrics/load cell are formed; The coal gas input port of said board-like gas preheating device connects gas line input pipeline section; The coal gas output port of board-like gas preheating device connects the first output pipeline section, the second output pipeline section; Gas line bypass pipeline section is connected between the gas line input pipeline section and the first output pipeline section, and the coal gas input port pipeline section of said board-like gas preheating device, the first output pipeline section, the second output pipeline section, gas line bypass pipeline section are equipped with valve separately, on said gas line input pipeline section, the first output pipeline section thermometric/load cell is installed.
2. the asynchronous double-preheating system of coal gas, air that is provided with the additional combustion stove according to claim 1; It is characterized in that; Said roasting kiln is provided with auxiliary air input system and auxiliary coal gas input system; The accessory fan that said auxiliary air input system is connected by air line successively, shut-off valve, variable valve, thermometric/load cell, roasting kiln air input port are formed, and the shut-off valve that said auxiliary coal gas input system is connected by gas line successively, variable valve, thermometric/load cell, roasting kiln coal gas input port are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204864052U CN202390462U (en) | 2011-11-29 | 2011-11-29 | Coal gas and air asynchronous dual preheating system provided with additional combustion furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204864052U CN202390462U (en) | 2011-11-29 | 2011-11-29 | Coal gas and air asynchronous dual preheating system provided with additional combustion furnace |
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| CN202390462U true CN202390462U (en) | 2012-08-22 |
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| CN2011204864052U Expired - Lifetime CN202390462U (en) | 2011-11-29 | 2011-11-29 | Coal gas and air asynchronous dual preheating system provided with additional combustion furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131813A (en) * | 2011-11-29 | 2013-06-05 | 上海雷林工程技术有限公司 | Coal gas and air asynchronous and double-preheating system with additionally arranged combustion furnace |
| EP3059328A4 (en) * | 2013-10-16 | 2017-06-28 | Nippon Steel & Sumikin Engineering Co., Ltd. | Hot blast furnace facility |
-
2011
- 2011-11-29 CN CN2011204864052U patent/CN202390462U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131813A (en) * | 2011-11-29 | 2013-06-05 | 上海雷林工程技术有限公司 | Coal gas and air asynchronous and double-preheating system with additionally arranged combustion furnace |
| EP3059328A4 (en) * | 2013-10-16 | 2017-06-28 | Nippon Steel & Sumikin Engineering Co., Ltd. | Hot blast furnace facility |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180508 Address after: 201611 Workshop 14, Lane 38, South Yao Road, Che Dun Town, Songjiang District, Shanghai Patentee after: Shanghai Industrial Equipment Co., Ltd. Address before: No. 558 Xinqiao Road, Xinqiao Town, Songjiang District, Shanghai City, Shanghai Patentee before: Shanghai Lalleen Engineering Technology Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |