CN103131814A - Coal gas and air synchronous double-preheating system with additionally arranged combustion furnace - Google Patents
Coal gas and air synchronous double-preheating system with additionally arranged combustion furnace Download PDFInfo
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- CN103131814A CN103131814A CN2011103935568A CN201110393556A CN103131814A CN 103131814 A CN103131814 A CN 103131814A CN 2011103935568 A CN2011103935568 A CN 2011103935568A CN 201110393556 A CN201110393556 A CN 201110393556A CN 103131814 A CN103131814 A CN 103131814A
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Abstract
The invention relates to a coal gas and air synchronous double-preheating system with an additionally arranged combustion furnace. The coal gas and air synchronous double-preheating system with the additionally arranged combustion furnace comprises a plate-type air preheater, a plate-type coal gas preheater, a chimney, the 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 synchronous double-preheating system with the additionally arranged combustion furnace has the advantages that temperature of air and temperature of coal gas can be adjusted according to requirements, partial smoke exhausted by a hot air furnace is mixed with high-temperature smoke generated by the vertical-type combustion furnace, and then both the air and the coal gas are synchronously preheated to about 250-300 DEG C through an air heat exchanger so as to lay a solid foundation for complete combustion in the hot air furnace; the plate-type preheater has the advantages of being high in heat exchanging efficiency, compact in structure, anti-corrosion, long in service life, capable of ensuring that ash is not easily accumulated, and easy to clean; and the system is reasonable and compact in structure, high in working condition stability, convenient to operate, strong in system adjustment ability and easy to maintain, and is a program capable of being popularized.
Description
Technical field:
The present invention relates to a kind of smelting of iron and steel, particularly relate to a kind of synchronous double-preheating system of coal gas, air of the additional combustion stove for hotblast stove.
Technical background:
Air ﹠ gas heater is to carry out heat exchange by the high-temperature flue gas that hotblast stove produces with burning freezing air used and inflammable gas, thereby the temperature of improving the freezing air of hotblast stove and inflammable gas reduces the energy consumption of equipment, high-temperature flue gas is cooling, reduction dust content, reduce the discharging of flue dust and obnoxious flavour (as sulfurous gas, oxynitride etc.) to reach environmental requirement, this has become common recognition in the industry.Hotblast stove will realize that can efficient key with high wind-warm syndrome be reach perfect combustion and high duty heat transfer in burning and heat transfer process.The inventor constantly studies and puts into practice in long-term working practice, the preheating temperature of learning further raising air and coal gas will more help perfect combustion, be preferred for making heat transfer process efficiently adopt plate-type heat exchanger, the present invention is the product that will both effectively combine.
Summary of the invention:
The objective of the invention is to provide for the prior art weak point a kind of rational in infrastructure, reliable operation, can realize higher wind-warm syndrome, the coal gas that is provided with the additional combustion stove of environmental contamination reduction, the synchronous double-preheating system of air.
The objective of the invention is to realize by following measures: a kind of synchronous double-preheating system of coal gas, air that is provided with the additional combustion stove, comprise plate air preheater, board-like gas preheater, chimney, it is characterized in that also having roasting kiln, flue gas pipeline and Controlling System, airline and Controlling System, gaspipe line and Controlling System; Wherein:
described flue gas pipeline and Controlling System are 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 preheater, flue bypass pipeline section, chimney, some control valves, some thermometrics/load cell forms, the described flue input pipeline section machine input port of giving a dinner for a visitor from afar respectively, flue bypass pipeline section, described roasting kiln flue gas input pipeline section connecting fan output port and roasting kiln flue gas input port, roasting kiln flue gas output pipeline section one end connects roasting kiln flue gas output port, the other end fishplate bar regenerative air heater flue gas input port, flue gas input port with board-like gas preheater, plate air preheater flue gas output port, the flue gas output port of board-like gas preheater, the splice connection of flue bypass pipeline section is to flue output pipeline section, flue output pipeline section is connected with chimney, described flue input blower fan pipeline section, roasting kiln flue gas input pipeline section, plate air preheater flue gas I/O pipeline section, board-like gas preheater flue I/O pipeline section, flue bypass pipeline section is equipped with control valve, described flue pipeline incoming/outgoing section, thermometric/load cell is installed, roasting kiln flue gas I/O pipeline section is equipped with thermometric/load cell, flue bypass pipeline section is equipped with thermometric/load cell, plate air preheater flue gas output port pipeline section, the flue gas output port pipeline section of board-like gas preheater is equipped with temperature element,
described airline and Controlling System are by air line I/O pipeline section, the air input/output end port of plate air preheater, air line bypass pipeline section, some control valves, some thermometrics/load cell forms, the air input/output end port of described plate air preheater connects respectively air line I/O pipeline section, air line bypass pipeline section is connected between air line I/O pipeline section, the air input/output end port pipeline section of described plate air preheater, air line bypass pipeline section is equipped with control valve separately, described air line input pipeline section, on air line output pipeline section, thermometric/load cell is installed separately,
described gaspipe line and Controlling System are inputted pipeline section by gas line, the first output pipeline section, the second output pipeline section, the coal gas input/output end port of board-like gas preheater, gas line bypass pipeline section, some control valves, some thermometrics/load cell forms, the coal gas input port of described board-like gas preheater connects gas line input pipeline section, the coal gas output port of board-like gas preheater connects the first output pipeline section, the second output pipeline section, gas line bypass pipeline section is connected between gas line input pipeline section and the first output pipeline section, the coal gas input port pipeline section of described board-like gas preheater, the first output pipeline section, the second output pipeline section, gas line bypass pipeline section is equipped with control valve separately, described gas line input pipeline section, on the first output pipeline section, thermometric/load cell is installed.
Described roasting kiln is provided with auxiliary air input system and auxiliary coal gas input system, the accessory fan that described auxiliary air input system is connected successively by air line, shut-off valve, thermometric/load cell, variable valve, roasting kiln air input port are formed, and the trip valve that described auxiliary coal gas input system is connected successively by gas line, variable valve, thermometric/load cell, 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 the temperature of air, coal gas as required, the partial fume that hotblast stove is discharged mixes with the high-temperature flue gas that vertical shaft furnace produces, synchronously air, coal gas all are preheating to 250～300 ℃ of left and right by air heat exchanger again, provide solid basis for realizing hotblast stove perfect combustion; 2) plate type preheater of native system has that heat transfer efficiency is high, compact construction, and is corrosion-resistant, the life-span is long, is difficult for the advantages such as dust stratification, easy cleaning; 3) native system is rational in infrastructure, compact, and operating mode stability is high, and easy to operate, system's regulating power is strong, the easy care maintenance, is a propagable project.
Description of drawings:
Fig. 1 is the example structure schematic 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.In figure, a kind of synchronous double-preheating system of coal gas, air that is provided with the additional combustion stove comprises: plate air preheater 20, board-like gas preheater 15, chimney 14, roasting kiln 32, flue gas pipeline and Controlling System, airline and Controlling System, gaspipe line and Controlling System; Wherein:
described flue gas pipeline and Controlling System are by flue 28 I/O pipeline sections, blower fan 25, roasting kiln 32 flue gas input/output end ports, roasting kiln 32 flue gas I/O pipeline sections, plate air preheater 20 flue gas input/output end ports, the flue gas input/output end port of board-like gas preheater 15, flue 28 bypass pipeline sections, chimney 14, some control valves, some thermometrics/load cell forms, described flue 28 input pipeline sections machine 25 input ports of giving a dinner for a visitor from afar respectively, flue 28 bypass pipeline sections, described roasting kiln 32 flue gas input pipeline section connecting fan 25 output ports and roasting kiln 32 flue gas input ports, roasting kiln 32 flue gas output pipeline section one ends connect roasting kiln 32 flue gas output ports, the flue gas input port of the other end fishplate bar regenerative air heater 20 flue gas input ports and board-like gas preheater 15, plate air preheater 20 flue gas output ports, the flue gas output port of board-like gas preheater 15, flue 28 bypass pipeline section splice connections are to flue 28 output pipeline sections, flue 28 output pipeline sections are connected with chimney 14, described flue 28 input blower fan pipeline sections are equipped with control valve 26, roasting kiln flue gas input pipeline section has control valve 16, plate air preheater 20 flue gas I/O pipeline sections are equipped with control valve 23/18, board-like gas preheater 15 flue I/O pipeline sections are equipped with control valve 4/12, flue 28 bypass pipeline sections are equipped with control valve 22, described flue pipeline 28 I/O pipeline sections are equipped with thermometric/load cell 2, roasting kiln flue gas I/O pipeline section is equipped with thermometric/load cell 2, flue 28 bypass pipeline sections are equipped with thermometric/load cell 2, plate air preheater 20 flue gas output port pipeline sections, the flue gas output port pipeline section of board-like gas preheater 15 is equipped with temperature element 3.In flue gas pipeline, hot-blast stove fume is inputted vertical shaft furnace wind mixed chamber by blower fan and is mixed with the high-temperature flue gas that vertical shaft furnace produces, mixed flue-gas temperature reaches 600 ℃ of left and right, mixed flue gas sends into plate air preheater and board-like gas preheater discharges sensible heat, with hotblast stove combustion air, ℃ left and right, gas preheating to 250～300; Then send into hotblast stove and burn, two interchanger are reduced to 150 ℃ of left and right with flue-gas temperature and enter chimney, realize the recovery of the waste heat energy.Separately, by regulating flue bypass pipeline section control valve, pressure, flow and the exhaust temperature of the flue gas of flue are regulated.
Described airline and Controlling System be by air line 10 I/O pipeline sections, the air input/output end port of plate air preheater 20, and air line 10 bypass pipeline sections, some control valves, some thermometric/load cells 2 form; The air input/output end port of described plate air preheater 20 connects respectively air line 10 I/O pipeline sections, air line 10 bypass pipeline sections are connected between air line 10 I/O pipeline sections, the air input/output end port pipeline section of described plate air preheater 20 is equipped with control valve 19/21, air line 10 bypass pipeline sections are equipped with control valve 16, on described air line 10 I/O pipeline sections, thermometric/load cell 2 is installed separately.In airline, on plate air preheater air input/output end port pipeline section and bypass pipeline section, regulated valve is set, plate air preheater input/output end port pipeline section set temperature pressure detection and access control system.The normal temperature combustion air is warming up to 250～300 ℃ of left and right after by plate air preheater, realizes the preheating to combustion air, and controls flow, pressure and the preheating temperature of hotblast stove combustion air by regulating valve on the air line by-pass line.
described gaspipe line and Controlling System are by gas line 36 input pipeline sections, the first output pipeline section, the second output pipeline section, the coal gas input/output end port of board-like gas preheater 15, gas line 36 bypass pipeline sections, some control valves, some thermometrics/load cell form, the coal gas input port of described board-like gas preheater 15 connects gas line input pipeline section, the coal gas output port of board-like gas preheater 15 connects the first output pipeline section, the second output pipeline section, gas line 36 bypass pipeline sections are connected between gas line input pipeline section and the first output pipeline section, the coal gas input port pipeline section of described board-like gas preheater 15 is equipped with control valve 9, the first output pipeline section is equipped with control valve 8, the second output pipeline section is equipped with control valve 5, gas line 36 bypass pipeline sections are equipped with control valve 7, described gas line 36 input pipeline sections, on the first output pipeline section, thermometric/load cell 2 is installed respectively.In gaspipe line, low temperature coal gas passes through gaspipe line, enter gas preheater through gas preheater entrance variable valve and carry out preheating, hotblast stove is sent into by the regulated valve of gas preheater outlet the first output channel in temperature increase to 250～300 ℃ burn.By regulating gas line bypass pipeline section control valve, pressure, flow and the preheating temperature of gaspipe line are regulated.The second output pipeline section joins by the auxiliary coal gas input system of valve and roasting kiln.
The present invention further takes following measure:
Described roasting kiln 32 is provided with auxiliary air input system and auxiliary coal gas input system, the accessory fan 34 that described auxiliary air input system is connected successively by air line, shut-off valve 33, thermometric/load cell 2, variable valve 29, roasting kiln 32 air input ports are formed, and the shut-off valve 1 that described auxiliary coal gas input system is connected successively by gas line, variable valve 35, thermometric/load cell 2, control valve 27, roasting kiln coal gas input port are formed.The trip valve the other end of gas line is connected with the second output pipeline section of gaspipe line and Controlling System.
the plate type air that the present invention adopts, when the gas double system moves, the high-temperature flue gas that hotblast stove produces, the low temperature combustion air, coal gas is by the corrugated board cluster of plate type preheater, add strong disturbance in the passage that section constantly changes, can realize that (Re=200) forms turbulent flow under low reynolds number, enhance heat transfer performance, complex heat transfer coefficient K can reach higher level, can be steadily in the long term with air, ℃ left and right, gas preheating to 250～300, improve 200～250 ℃ of wind-warm syndrome, possessed the condition that reaches perfect combustion, therefore hotblast stove can be realized take Experience of Using Single Bf Gas as fuel, make wind-warm syndrome reach ability more than 1250 ℃.Can reduce iron coke per ton ratio 40～50Kg, increase the iron amount 8～10% of producing, increase injecting coal quantity 100～125Kg, and solved the problem of diffusing of blast furnace gas, reduce environmental pollution, bring huge economic benefit to the user.
The above has described embodiments of the present invention by reference to the accompanying drawings, and the structure that embodiment provides is not construed as limiting the invention, and in this area, those skilled in the art make within the scope of the appended claims various distortion or revise all in protection domain.
Claims (2)
1. synchronous double-preheating system of coal gas, air that is provided with the additional combustion stove, comprise plate air preheater, board-like gas preheater, chimney, it is characterized in that also having roasting kiln, flue gas pipeline and Controlling System, airline and Controlling System, gaspipe line and Controlling System; Wherein:
described flue gas pipeline and Controlling System are 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 preheater, flue bypass pipeline section, chimney, some control valves, some thermometrics/load cell forms, the described flue input pipeline section machine input port of giving a dinner for a visitor from afar respectively, flue bypass pipeline section, described roasting kiln flue gas input pipeline section connecting fan output port and roasting kiln flue gas input port, roasting kiln flue gas output pipeline section one end connects roasting kiln flue gas output port, the other end fishplate bar regenerative air heater flue gas input port, flue gas input port with board-like gas preheater, plate air preheater flue gas output port, the flue gas output port of board-like gas preheater, the splice connection of flue bypass pipeline section is to flue output pipeline section, flue output pipeline section is connected with chimney, described flue input blower fan pipeline section, roasting kiln flue gas input pipeline section, plate air preheater flue gas I/O pipeline section, board-like gas preheater flue I/O pipeline section, flue bypass pipeline section is equipped with control valve, described flue pipeline incoming/outgoing section, thermometric/load cell is installed, roasting kiln flue gas I/O pipeline section is equipped with thermometric/load cell, flue bypass pipeline section is equipped with thermometric/load cell, plate air preheater flue gas output port pipeline section, the flue gas output port pipeline section of board-like gas preheater is equipped with temperature element,
described airline and Controlling System are by air line I/O pipeline section, the air input/output end port of plate air preheater, air line bypass pipeline section, some control valves, some thermometrics/load cell forms, the air input/output end port of described plate air preheater connects respectively air line I/O pipeline section, air line bypass pipeline section is connected between air line I/O pipeline section, the air input/output end port pipeline section of described plate air preheater, air line bypass pipeline section is equipped with control valve separately, described air line input pipeline section, on air line output pipeline section, thermometric/load cell is installed separately,
described gaspipe line and Controlling System are inputted pipeline section by gas line, the first output pipeline section, the second output pipeline section, the coal gas input/output end port of board-like gas preheater, gas line bypass pipeline section, some control valves, some thermometrics/load cell forms, the coal gas input port of described board-like gas preheater connects gas line input pipeline section, the coal gas output port of board-like gas preheater connects the first output pipeline section, the second output pipeline section, gas line bypass pipeline section is connected between gas line input pipeline section and the first output pipeline section, the coal gas input port pipeline section of described board-like gas preheater, the first output pipeline section, the second output pipeline section, gas line bypass pipeline section is equipped with control valve separately, described gas line input pipeline section, on the first output pipeline section, thermometric/load cell is installed.
2. the synchronous double-preheating system of coal gas, air that is provided with the additional combustion stove according to claim 1, it is characterized in that, described roasting kiln is provided with auxiliary air input system and auxiliary coal gas input system, the accessory fan that described auxiliary air input system is connected successively by air line, shut-off valve, thermometric/load cell, variable valve, roasting kiln air input port are formed, and the shut-off valve that described auxiliary coal gas input system is connected successively by gas line, variable valve, thermometric/load cell, control valve, roasting kiln coal gas input port are formed.
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| CN2011103935568A CN103131814A (en) | 2011-12-01 | 2011-12-01 | Coal gas and air synchronous double-preheating system with additionally arranged combustion furnace |
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| CN2011103935568A CN103131814A (en) | 2011-12-01 | 2011-12-01 | Coal gas and air synchronous double-preheating system with additionally arranged combustion furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320561A (en) * | 2013-06-08 | 2013-09-25 | 中冶南方工程技术有限公司 | Hot-blast stove system for high air temperature by using pure blast furnace gas and method thereof |
| CN115491452A (en) * | 2022-08-30 | 2022-12-20 | 鞍钢股份有限公司 | Production method for reducing emission concentration of nitrogen oxides in flue gas of blast furnace hot blast stove |
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| CN1188808A (en) * | 1997-01-24 | 1998-07-29 | 冶金工业部鞍山热能研究院 | Technology for double preheating by using blast-furnace hot-blast stove gas, and combustion-supporting air |
| CN201305608Y (en) * | 2008-12-05 | 2009-09-09 | 攀枝花新钢钒股份有限公司 | Hot-blast furnace cascade system of preheating |
| CN101928796A (en) * | 2010-07-29 | 2010-12-29 | 江苏中天能源设备有限公司 | High wind temperature energy saving and emission reduction combined preheating method for blast furnace |
| CN202390463U (en) * | 2011-12-01 | 2012-08-22 | 上海雷林工程技术有限公司 | Gas and air synchronous double preheating system provided with auxiliary combustion furnace |
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2011
- 2011-12-01 CN CN2011103935568A patent/CN103131814A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1188808A (en) * | 1997-01-24 | 1998-07-29 | 冶金工业部鞍山热能研究院 | Technology for double preheating by using blast-furnace hot-blast stove gas, and combustion-supporting air |
| CN201305608Y (en) * | 2008-12-05 | 2009-09-09 | 攀枝花新钢钒股份有限公司 | Hot-blast furnace cascade system of preheating |
| CN101928796A (en) * | 2010-07-29 | 2010-12-29 | 江苏中天能源设备有限公司 | High wind temperature energy saving and emission reduction combined preheating method for blast furnace |
| CN202390463U (en) * | 2011-12-01 | 2012-08-22 | 上海雷林工程技术有限公司 | Gas and air synchronous double preheating system provided with auxiliary combustion furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320561A (en) * | 2013-06-08 | 2013-09-25 | 中冶南方工程技术有限公司 | Hot-blast stove system for high air temperature by using pure blast furnace gas and method thereof |
| CN115491452A (en) * | 2022-08-30 | 2022-12-20 | 鞍钢股份有限公司 | Production method for reducing emission concentration of nitrogen oxides in flue gas of blast furnace hot blast stove |
| CN115491452B (en) * | 2022-08-30 | 2023-09-26 | 鞍钢股份有限公司 | Production method for reducing emission concentration of nitrogen oxides in flue gas of blast furnace hot blast stove |
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Application publication date: 20130605 |